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Sample records for hierro como problema

  1. Estimación de pequeñas perturbaciones en satélites geocéntricos como un problema inverso

    NASA Astrophysics Data System (ADS)

    Zadunaisky, P. E.

    El movimiento geocéntrico de un satélite artificial es simulado automáticamente por un sistema de ecuaciones diferenciales de segundo orden que incluyen dos funciones perturbadoras. La primera representa el segundo término del potencial gravitatorio de la Tierra y la segunda corresponde al frenado atmosférico. Asumiendo como conocidas, por hipótesis o por mediciones, la posición y velocidad del satélite en instantes sucesivos se estiman las perturbaciones a intervalos sucesivos por un método determinístico. Para ilustrar el método y comprobar la precisión de nuestros resultados hemos simulado dos ejemplos incluyendo valores conocidos de las perturbaciones que luego comparamos con los resultados de nuestro método. El método puede aplicarse por ejemplo para el intervalo de una revolución satelital lo cual permitiría el diseño inmediato de una maniobra correctiva de la órbita satelital.

  2. The sub-volcanic system of El Hierro, Canary Islands

    NASA Astrophysics Data System (ADS)

    Galindo, I.; Becerril, L.; Gudmundsson, A.

    2012-04-01

    The main volcanotectonic structures of El Hierro are three rift zones, trending northeast, west, and south. Most of the eruptions in El Hierro within these zones are basaltic fissure eruptions fed by subvertical dykes. The dykes appear as close to collinear or slightly offset segments, their surface expressions being clusters of cinder cones and eruptive vents. Three large landslides, referred to as El Golfo, El Julan, and Las Playas, have eroded the areas between rift axes and provide exposures that make it possible to provide a three-dimensional view of the uppermost part of the sub-volcanic system. Here we report the results of a structural study of the sub-volcanic system as obtained through the analysis of dykes and eruptive vents. The data obtained from surface outcrops have been combined with data from subsurface water galleries. More than 600 eruptive vents and 625 dykes have been studied in detail to characterise the subvolcanic system of the island. Using cinder-cone and other eruptive-vent alignments it has been possible to infer 115 eruptive fissures with lengths that range from 40 m to 2200 m. NE-SW trending volcanic fissures and dykes are common on the entire island and predominate in the northeast rift zone. The main strike of the dykes and fissures in the south and west rift zones are approximately NNW-SSE and E-W, respectively. However, in the west rift zone, eruptive fissures display a fan distribution with directions that range from N43°E to N124°E. Volcanic fissures within the El Golfo landslide valley trend parallel to the head scarp, except those that are close to the head of the valley, many of which are perpendicular to the scarp. Dykes show a radial distribution in the head scarp of the El Golfo landslide. Three feeder-dykes directly connected with their lava flows have been identified in El Hierro. Feeder dykes are difficult to observe in the field but provide important information when their lengths and thicknesses can be measured

  3. Geochronological constraints on the evolution of El Hierro (Canary Islands)

    NASA Astrophysics Data System (ADS)

    Becerril, Laura; Ubide, Teresa; Sudo, Masafumi; Martí, Joan; Galindo, Inés; Galé, Carlos; Morales, Jose María; Yepes, Jorge; Lago, Marceliano

    2016-01-01

    New age data have been obtained to time constrain the recent Quaternary volcanism of El Hierro (Canary Islands) and to estimate its recurrence rate. We have carried out 40Ar/39Ar geochronology on samples spanning the entire volcanostratigraphic sequence of the island and 14C geochronology on the most recent eruption on the northeast rift of the island: 2280 ± 30 yr BP. We combine the new absolute data with a revision of published ages onshore, some of which were identified through geomorphological criteria (relative data). We present a revised and updated chronology of volcanism for the last 33 ka that we use to estimate the maximum eruptive recurrence of the island. The number of events per year determined is 9.7 × 10-4 for the emerged part of the island, which means that, as a minimum, one eruption has occurred approximately every 1000 years. This highlights the need of more geochronological data to better constrain the eruptive recurrence of El Hierro.

  4. Estructura orbital en el Problema Restringido Rectilíneo Isósceles

    NASA Astrophysics Data System (ADS)

    Orellana, R. B.

    Para definir problemas en Mecánica Celeste se utilizan diferentes parámetros. El conocimiento de la dinámica del problema para valores particulares de estos parámetros nos permite entender el comportamiento en casos más generales. El Problema Restringido Rectilíneo Isósceles puede ser considerado como el caso límite del Problema de Sitnikov cuando la excentricidad tiende a uno o como el Problema Isósceles cuando la masa central tiende a cero. Se ha compactificado el espacio de fases y analizado la dinámica en el límite. Esto ha permitido separar el espacio de fases en diferentes regiones dependiendo de las clases de órbitas.

  5. Mode switching in volcanic seismicity: El Hierro 2011-2013

    NASA Astrophysics Data System (ADS)

    Roberts, Nick S.; Bell, Andrew F.; Main, Ian G.

    2016-05-01

    The Gutenberg-Richter b value is commonly used in volcanic eruption forecasting to infer material or mechanical properties from earthquake distributions. Such studies typically analyze discrete time windows or phases, but the choice of such windows is subjective and can introduce significant bias. Here we minimize this sample bias by iteratively sampling catalogs with randomly chosen windows and then stack the resulting probability density functions for the estimated b>˜ value to determine a net probability density function. We examine data from the El Hierro seismic catalog during a period of unrest in 2011-2013 and demonstrate clear multimodal behavior. Individual modes are relatively stable in time, but the most probable b>˜ value intermittently switches between modes, one of which is similar to that of tectonic seismicity. Multimodality is primarily associated with intermittent activation and cessation of activity in different parts of the volcanic system rather than with respect to any systematic inferred underlying process.

  6. Spatial probability distribution of future volcanic eruptions at El Hierro Island (Canary Islands, Spain)

    NASA Astrophysics Data System (ADS)

    Becerril, Laura; Cappello, Annalisa; Galindo, Inés; Neri, Marco; Del Negro, Ciro

    2013-05-01

    The 2011 submarine eruption that took place in the proximity of El Hierro Island (Canary Islands, Spain) has raised the need to identify the most likely future emission zones even on volcanoes characterized by low frequency activity. Here, we propose a probabilistic method to build the susceptibility map of El Hierro, i.e. the spatial distribution of vent opening for future eruptions, based on the probabilistic analysis of volcano-structural data of the Island collected through new fieldwork measurements, bathymetric information, as well as analysis of geological maps, orthophotos and aerial photographs. These data have been divided into different datasets and converted into separate and weighted probability density functions, which were included in a non-homogeneous Poisson process to produce the volcanic susceptibility map. The most likely area to host new eruptions in El Hierro is in the south-western part of the West rift. High probability locations are also found in the Northeast and South rifts, and along the submarine parts of the rifts. This map represents the first effort to deal with the volcanic hazard at El Hierro and can be a support tool for decision makers in land planning, emergency measures and civil defense actions.

  7. Spatial vent opening probability map of El Hierro Island (Canary Islands, Spain)

    NASA Astrophysics Data System (ADS)

    Becerril, Laura; Cappello, Annalisa; Galindo, Inés; Neri, Marco; Del Negro, Ciro

    2013-04-01

    The assessment of the probable spatial distribution of new eruptions is useful to manage and reduce the volcanic risk. It can be achieved in different ways, but it becomes especially hard when dealing with volcanic areas less studied, poorly monitored and characterized by a low frequent activity, as El Hierro. Even though it is the youngest of the Canary Islands, before the 2011 eruption in the "Las Calmas Sea", El Hierro had been the least studied volcanic Island of the Canaries, with more historically devoted attention to La Palma, Tenerife and Lanzarote. We propose a probabilistic method to build the susceptibility map of El Hierro, i.e. the spatial distribution of vent opening for future eruptions, based on the mathematical analysis of the volcano-structural data collected mostly on the Island and, secondly, on the submerged part of the volcano, up to a distance of ~10-20 km from the coast. The volcano-structural data were collected through new fieldwork measurements, bathymetric information, and analysis of geological maps, orthophotos and aerial photographs. They have been divided in different datasets and converted into separate and weighted probability density functions, which were then included in a non-homogeneous Poisson process to produce the volcanic susceptibility map. Future eruptive events on El Hierro is mainly concentrated on the rifts zones, extending also beyond the shoreline. The major probabilities to host new eruptions are located on the distal parts of the South and West rifts, with the highest probability reached in the south-western area of the West rift. High probabilities are also observed in the Northeast and South rifts, and the submarine parts of the rifts. This map represents the first effort to deal with the volcanic hazard at El Hierro and can be a support tool for decision makers in land planning, emergency plans and civil defence actions.

  8. Full-Vector Geomagnetic Field Records for the Late Quaternary from El Hierro and the Eifel

    NASA Astrophysics Data System (ADS)

    Monster, M.; de Groot, L. V.; Dekkers, M. J.; van Galen, J. P.; Kuiper, K.; Langemeijer, J.; Wiarda, L. R.

    2015-12-01

    Twenty-eight flows in the age range of c. 100 to c. 500 ka were sampled on the island of El Hierro (Canary Islands, Spain) and twelve in the Eifel (Germany). All sites from the Eifel had been previously dated, whereas the ages of the El Hierro flows were approximated by stratigraphic and directional coherency with a dated section c. 4 km to the north-east. Additionally, seven flows were dated using the ThermoFisher Helix multi-collector mass spectrometer at VU University Amsterdam (the Netherlands). The rocks were subjected to standard rock magnetic and palaeomagnetic experiments. Palaeodirections were obtained using both thermal and alternating-field demagnetisation techniques. Apart from two sites that appear to have been struck by lightning, all sites yielded reliable palaeodirections. Absolute palaeointensities were obtained using three different methods: IZZI-Thellier, the multispecimen protocol and the calibrated pseudo-Thellier technique. Nineteen sites from El Hierro and all twelve sites from the Eifel passed the selection criteria for one or more of these methods, with the pseudo-Thellier technique having the highest success rate (c. 35% for El Hierro and 55% for the Eifel). The palaeointensities obtained for El Hierro were mostly between 20 and 40 μT and for the Eifel between 20 and 50 μT, both with a tendency to be somewhat low compared to the present-day field of c. 39 μT and c. 49 μT, respectively. The pseudo-Thellier and multispecimen methods generally yielded lower palaeointensities than IZZI-Thellier, but no clear trend was visible.

  9. Mafic intrusion remobilising silicic magma under El Hierro, Canary Islands

    NASA Astrophysics Data System (ADS)

    Sigmarsson, O.; Laporte, D.; Marti, J.; Devouard, B.; Cluzel, N.

    2012-04-01

    The 2011 submarine eruption at El Hierro, Canary Islands, has produced volcanic bombs that degas at sea surface, boil seawater and sink when cooled and degassed. At the beginning of the eruption white coloured pumices enveloped in darker coloured spatters floated on land. These composite pumices show evidence of magma mingling with folds and undulations of the darker coloured magma within the white pumice suggesting magma mingling in a viscous regime. The white pumice is highly vesicular and resembles foam. Most of the vesicular structure is made of tightly packed, polygonal bubbles of uniform size (˜ 100 μm), suggesting a single event of homogeneous bubble nucleation. An earlier event of heterogeneous bubble nucleation is indicated by the presence of a few large bubbles developed around tiny quartz crystals. Both the darker and lighter coloured pumices are almost aphyric. A few olivine crystals with perfect euhedral morphology occur within the darker part. Rare olivines of same composition are also found in the white pumice glass but then display somewhat rounded outlines and hopper-type structure. Melt inclusions in olivines of the darker pumice are of the same composition as the enveloping mafic glass, whereas olivines in the mixing boundary layer have melt inclusions of less mafic composition. The whole-rock composition and slightly more evolved glass composition are of basanitc and alkali rhyolitic composition (at the limit of the trachyte field) according to the TAS classification. Such rhyolitic compositions are rare in the Canaries. Analyses of residual volatile concentration in the glasses show that the silicic glass is highly degassed (F: 511 ±222; Cl: 202 ±58; S: below detection limit; values in ppm,1SD, n=10), whereas the basanitic glass still has very high halogene concentrations (F: 1354 ±151; Cl: 1026 ±47; S: 362 ±29; 1SD, n=10). In-situ analysis of trace element compositions of the dark glasses reveal typical basanitic compositions with

  10. Melt inclusion study of the most recent basanites from El Hierro and Lanzarote, Canary Islands

    NASA Astrophysics Data System (ADS)

    Gomez-Ulla, Alejandra; Sigmarsson, Olgeir; Huertas, Maria Jose; Ancochea, Eumenio

    2015-04-01

    The latest eruptions of both Lanzarote (one of the oldest and easternmost of the Canary Island archipelago) and El Hierro (the youngest and westernmost) produced basanite lavas. Major, volatile and trace element concentrations of melt inclusion (MI) hosted in olivine for both eruptions have been analysed. The basanites display primitive mantle normalized trace element spectra suggesting a magma source largely composed of recycled oceanic crust. In addition, beneath Lanzarote an interaction with a carbonatitic fluid phase or metasome would explain eccentric Ba/U and other trace element ratios. Contribution of carbonatitic component would readily account for extremely volatile-rich (Cl, F, S) MI from Lanzarote (Cl=1577-2500 ppm) whereas the maximum for El Hierro is 1080 ppm. The submarine character of the 2011-12 eruption off El Hierro appears to have affected the degassing behavior, whereas estimated sulfur emission to the atmosphere during the historical Lanzarote eruptions are amongst the highest observed so far. An estimated magma volume (VDRE) of 0.02 km3 yields atmospheric mass loading of 0.2 Mt SO2 from the 1824 Lanzarote eruption. Scaling the volume of the 1824 Lanzarote eruption to that of the previous Timanfaya eruption (1730-6; 5 km3) results in estimated 12 Mt SO2, an atmospheric mass loading only outnumbered by the historical Laki and Eldgjá eruptions in Iceland. The significantly greater volatile budget of basanites from Lanzarote compared to El Hierro is thus controlled by more fertile source composition closer to the African continent.

  11. Magmatic sill intrusions beneath El Hierro Island following the 2011-2012 submarine eruption

    NASA Astrophysics Data System (ADS)

    Benito-Saz, María Á.; Sigmundsson, Freysteinn; Parks, Michelle M.; García-Cañada, Laura; Domínguez Cerdeña, Itahiza

    2016-04-01

    El Hierro, the most southwestern island of Canary Islands, Spain, is a volcano rising from around 3600 m above the ocean floor and up to of 1500 m above sea level. A submarine eruption occurred off the coast of El Hierro in 2011-2012, which was the only confirmed eruption in the last ~ 600 years. Activity continued after the end of the eruption with six magmatic intrusions occurring between 2012-2014. Each of these intrusions was characterized by hundreds of earthquakes and 3-19 centimeters of observed ground deformation. Ground displacements at ten continuous GPS sites were initially inverted to determine the optimal source parameters (location, geometry, volume/pressure change) that best define these intrusions from a geodetic point of view. Each intrusive period appears to be associated with the formation of a separate sill, with inferred volumes between 0.02 - 0.3 km3. SAR images from the Canadian RADARSAT-2 satellite and the Italian Space Agency COSMO-SkyMed constellation have been used to produce high-resolution detailed maps of line-of-sight displacements for each of these intrusions. These data have been combined with the continuous GPS observations and a joint inversion undertaken to gain further constraints on the optimal source parameters for each of these separate intrusive events. The recorded activity helps to understand how an oceanic intraplate volcanic island grows through repeated sill intrusions; well documented by seismic, GPS and InSAR observations in the case of the El Hierro activity.

  12. Early signs of geodynamic activity before the 2011-2012 El Hierro eruption

    NASA Astrophysics Data System (ADS)

    López, Carmen; García-Cañada, Laura; Martí, Joan; Domínguez Cerdeña, Itahiza

    2017-02-01

    The potential relation between mantle plume dynamics, regional tectonics and eruptive activity in the Canary Islands has not been studied yet through the analysis of long-time series of geophysical observational data. The existence of highly reliable seismic and geodetic data has enabled us to study from 1996 to 2014 the geodynamic evolution of the North Atlantic Azores-Gibraltar region (including the NW African margin) and its relationship with recent volcanic activity in El Hierro (Canary Islands). We compiled a new and unified regional seismic catalog and used long time-series of digital 3D surface displacements recorded by permanent GPS stations in the region. A joint regional- and local-scale analysis based on these data enabled us to identify signs of anomalous tectonic activity from 2003 onwards, whose intensity increased in 2007 and finally accelerated three months before the onset of the volcanic eruption on El Hierro in October 2011. Activity included the occurrence of regional extension and an uplift process affecting the southern Iberian Peninsula, NW Africa, and the Canary Islands. We interpret these observations as early signs of the geodynamic activity, which led to El Hierro eruption and the subsequent episodes of magma intrusion. Results point to the significant contribution of the mantle plume dynamics (i.e. external forces) in this renewed volcanic activity in the Canary Islands and emphasize the role of mantle dynamics in controlling regional tectonics.

  13. Structural interpretation of El Hierro (Canary Islands) rifts system from gravity inversion modelling

    NASA Astrophysics Data System (ADS)

    Sainz-Maza, S.; Montesinos, F. G.; Martí, J.; Arnoso, J.; Calvo, M.; Borreguero, A.

    2017-08-01

    Recent volcanism in El Hierro Island is mostly concentrated along three elongated and narrow zones which converge at the center of the island. These zones with extensive volcanism have been identified as rift zones. The presence of similar structures is common in many volcanic oceanic islands, so understanding their origin, dynamics and structure is important to conduct hazard assessment in such environments. There is still not consensus on the origin of the El Hierro rift zones, having been associated with mantle uplift or interpreted as resulting from gravitational spreading and flank instability. To further understand the internal structure and origin of the El Hierro rift systems, starting from the previous gravity studies, we developed a new 3D gravity inversion model for its shallower layers, gathering a detailed picture of this part of the island, which has permitted a new interpretation about these rifts. Previous models already identified a main central magma accumulation zone and several shallower high density bodies. The new model allows a better resolution of the pathways that connect both levels and the surface. Our results do not point to any correspondence between the upper parts of these pathways and the rift identified at the surface. Non-clear evidence of progression toward deeper parts into the volcanic system is shown, so we interpret them as very shallow structures, probably originated by local extensional stresses derived from gravitational loading and flank instability, which are used to facilitate the lateral transport of magma when it arrives close to the surface.

  14. Psychological aspects in a volcanic crisis: El Hierro Island eruption (October, 2011).

    NASA Astrophysics Data System (ADS)

    Lopez, P.; Llinares, A.; Garcia, A.; Marrero, J. M.; Ortiz, R.

    2012-04-01

    The recent eruption on the El Hierro Island (Canary Islands, Spain) has shown that Psychology plays an important role in the emergence management of a natural phenomenon. However, Psychology continues to have no social coverage it deserves in the mitigation of the effects before, during and after the occurrence of a natural phenomenon. Keep in mind that an unresolved psychological problem involves an individual and collective mismatch may become unrecoverable. The population of El Hierro has been under a state of alert since July 2011, when seismic activity begins, until the occurrence of submarine eruption in October 2011 that is held for more than three months. During this period the inhabitants of the small island have gone through different emotional states ranging from confusion to disappointment. A volcanic eruption occurs not unexpectedly, allowing to have a time of preparation / action before the disaster. From the psychological point of view people from El Hierro Island have responded to different stages of the same natural process. Although the island of El Hierro is of volcanic origin, the population has no historical memory since the last eruption occurred in 1793. Therefore, the educational system does not adequately address the formation in volcanic risk. As a result people feel embarrassment when the seismovolcanic crisis begins, although no earthquakes felt. As an intermediate stage, when the earthquakes are felt by the population, scientists and operational Emergency Plan care to inform and prepare actions in case of a possible eruption. The population feel safe despite the concerns expressed by not knowing where, how and when the eruption will occur. Once started the submarine eruption, taking into account that all the actions (evacuation, relocation, etc.) have worked well and that both their basic needs and security are covered there are new states of mind. These new emotional states ranging from disenchantment with the phenomenology of the

  15. From 3D to 4D seismic tomography at El Hierro Island (Canary Islands, Spain)

    NASA Astrophysics Data System (ADS)

    Garcia-Yeguas, A.; Koulakov, I.; Jakovlev, A.; Ibáñez, J. M.

    2012-04-01

    In this work we are going to show the advantages of a dynamic tomography 4D, versus a static image 3D related with a volcanic reactivation and eruption at El Hierro island (Canary Islands, Spain). In this process a high number of earthquakes before and during the eruptive processes have been registered. We are going to show a 3D image as an average of the velocity structure and then the characteristics and physical properties on the medium, including the presence or not of magma. This image will be complemented with its evolution along the time, observing its volcanic dynamic and its influence over the medium properties, including its power as an important element on early warnings protocols. After more than forty years of quiet at Canary Islands, since 1971 with Teneguía eruption at La Palma Island, and more than 200 years on El Hierro Island (The last eruption known at El Hierro took place in 1793, volcán de Lomo Negro), on 19th July on 2011 the Spanish seismic national network, administered by IGN (Instituto Geográfico Nacional), detected an increase of local seismic activity below El Hierro island (Canary Islands, Spain). Since this moment an intense swarm took place, with more than 11000 events, until 11th December, with magnitudes (MLg) from 0.2 to 4.4. In this period two eruptive processes have been declared in front of the South coast of El Hierro island, and they have not finished yet. This seismic swarm has allowed carrying out a 3D seismic tomography, using P and S waves traveltimes. It has showed a low velocity from the North to the South. On the other hand, we have performed a 4D seismic tomography, taking the events occurred at different intervals of time. We can observe the evolution of the negative anomaly along the time, from the North to the South, where has taken place La Restinga submarine eruption. 4D seismic tomography is an innovative and powerful tool able to show the evolution in time of a volcanic process.

  16. Felsic volcanism in a basic shield (El Hierro, Canary Islands). Implications in terms of volcanic hazards.

    NASA Astrophysics Data System (ADS)

    Pedrazzi, Dario; Becerril Carretero, Laura; Martí Molist, Joan; Meletlidis, Stavros; Galindo Jiménez, Inés

    2014-05-01

    El Hierro, the southwesternmost and smallest island of the Canary Archipelago, is a complex basaltic shield volcano characterized by mainly effusive volcanism with both Strombolian and Hawaiian activity. Explosive felsic volcanism is not a common feature of the archipelago and, so far, it has only been reported on the central islands of Tenerife and Gran Canaria, where it has been responsible for the formation of large central volcanic complexes. The presence of felsic rocks on the other islands of the archipelago and specifically on El Hierro is mostly restricted to subvolcanic intrusions and a few lava flows, generally associated with the oldest parts of the islands. We hereby report the presence of a trachytic pumice deposit on the island of El Hierro, referred to here as the Malpaso Member. A detailed stratigraphic, lithological, and sedimentological study was carried out on the deposits of this explosive episode of felsic composition, which is the only one found on the Canary Islands apart from those of Gran Canaria and Tenerife. Four different subunits were identified on the basis of their lithological and granulometrical characteristics. The products of the eruption correspond to a single eruptive event and cover an area of about 13 km2. This deposit originated from a base-surge-type explosive eruption with a subsequent radial emplacement of dilute PDC currents, was emplaced from the vent that would have been located in a similar position to the volcano of Tanganasoga. The low vesicularity of juvenile fragments and the morphological characteristics of the fine particles, as well as the high proportion of lithic fragments and the ash-rich nature of the deposit, suggest that magma/water interaction controlled the dynamics of the eruption. This study demonstrates that magmas from El Hierro could have the potential for producing an explosive eruption, in an environment in which the majority of the eruptions are basaltic and effusive in nature. Bearing in mind

  17. Volcanic Alert System (VAS) developed during the (2011-2013) El Hierro (Canary Islands) volcanic process

    NASA Astrophysics Data System (ADS)

    Ortiz, Ramon; Berrocoso, Manuel; Marrero, Jose Manuel; Fernandez-Ros, Alberto; Prates, Gonçalo; De la Cruz-Reyna, Servando; Garcia, Alicia

    2014-05-01

    In volcanic areas with long repose periods (as El Hierro), recently installed monitoring networks offer no instrumental record of past eruptions nor experience in handling a volcanic crisis. Both conditions, uncertainty and inexperience, contribute to make the communication of hazard more difficult. In fact, in the initial phases of the unrest at El Hierro, the perception of volcanic risk was somewhat distorted, as even relatively low volcanic hazards caused a high political impact. The need of a Volcanic Alert System became then evident. In general, the Volcanic Alert System is comprised of the monitoring network, the software tools for the analysis of the observables, the management of the Volcanic Activity Level, and the assessment of the threat. The Volcanic Alert System presented here places special emphasis on phenomena associated to moderate eruptions, as well as on volcano-tectonic earthquakes and landslides, which in some cases, as in El Hierro, may be more destructive than an eruption itself. As part of the Volcanic Alert System, we introduce here the Volcanic Activity Level which continuously applies a routine analysis of monitoring data (particularly seismic and deformation data) to detect data trend changes or monitoring network failures. The data trend changes are quantified according to the Failure Forecast Method (FFM). When data changes and/or malfunctions are detected, by an automated watchdog, warnings are automatically issued to the Monitoring Scientific Team. Changes in the data patterns are then translated by the Monitoring Scientific Team into a simple Volcanic Activity Level, that is easy to use and understand by the scientists and technicians in charge for the technical management of the unrest. The main feature of the Volcanic Activity Level is its objectivity, as it does not depend on expert opinions, which are left to the Scientific Committee, and its capabilities for early detection of precursors. As a consequence of the El Hierro

  18. Origin and significance of the 2011 El Hierro xeno-pumice

    NASA Astrophysics Data System (ADS)

    Zaczek-Pedroza, Kirsten; Troll, Valentin R.; Deegan, Frances M.; Meade, Fiona C.; Burchardt, Steffi; Carracedo, Juan C.; Klügel, Andreas; Harris, Chris; Wiesmaier, Sebastian; Berg, Sylvia E.; Barker, Abigail K.

    2014-05-01

    During the first week of the 2011/2012 submarine eruption off El Hierro (Canary Islands), peculiar light-coloured pumiceous rocks (xeno-pumice) were found floating on the sea. The appearance of these rocks led to a potentially inappropriate response from the authorities, because the rocks were viewed as likely indicators of high-silica magma and possible explosive eruptive behaviour. However, the eruption remained a relatively minor and dominantly effusive event and the origin and significance of these peculiar xeno-pumice rocks for volcanic monitoring remains unresolved. Three contrasting models have been put forward, describing them as: a) recycled hydrothermally altered felsic magmatic rocks (Meletlidis et al., 2012, Geophys. Res. Lett., 39:L17302), b) sediment-contaminated high-silica magma (Sigmarsson et al., 2013, Contrib. Mineral. Petrol., 165:601-622) or c) frothy xenoliths from pre-island sedimentary strata that were melted while immersed in magma (Troll et al., 2012, Solid Earth, 3:97-110). Here, we combine the three available datasets to assess the origin of El Hierro xeno-pumice in the light of texture, mineralogy, major and trace element composition, and oxygen isotope characteristics in order to discuss their significance. We note that: 1) Sedimentary relicts occur frequently in xeno-pumice samples with occasionally observed relict bedding. 2) Vesicle sizes are extremely variable, which documents multiple degassing events. The vesicles are biggest especially close to sedimentary relicts, likely the result of a complex mix of minerals and porewaters originally present. 3) The mineral assemblage of xeno-pumice includes quartz, smectite, illite, wollastonite, jasper and mica (XRD) and is akin to marine sedimentary rocks in the region (Hoernle, 1998, J. Petrol.,39:859-880; Robertson & Stillman, 1979, J. Geol. Soc., 136:47 -60; Aparicio et al., 2006, Geol. Mag. 143:181 -193). 4) CIPW norms calculated from xeno-pumice major element compositions show the

  19. El Hierro's floating stones as messengers of crust-magma interaction at depth

    NASA Astrophysics Data System (ADS)

    Burchardt, S.; Troll, V. R.; Schmeling, H.; Koyi, H.; Blythe, L. S.; Longpré, M. A.; Deegan, F. M.

    2012-04-01

    During the early stages of the submarine eruption that started on October 10 2011 south of El Hierro, Canary Islands, Spain, peculiar eruption products were found floating on the sea surface. These centimetre- to decimetre-sized "bombs" have been termed "restingolites" after the nearby village La Restinga and consist of a basaltic rind and a white to light grey core that resembles pumice in texture. According to Troll et al. (2011; see also Troll et al. EGU 2012 Abstracts), this material consists of a glassy matrix hosting extensive vesicle networks, which results in extremely low densities allowing these rocks to float on sea water. Mineralogical and geochemical analyses reveal that the "restingolites" originate from the sedimentary rocks (sand-, silt-, and mudstones) that form layer 1 of the oceanic crust beneath El Hierro. During the onset and early stages of the eruption, magma ponded at the base of this sedimentary sequence, breaking its way through the sedimentary rocks to the ocean floor. The textures of the "restingolites" reveal that crust-magma interaction during fragmentation and transport of the xenoliths involved rapid partial melting and volatile exsolution. Xenoliths strikingly similar to those from El Hierro are known from eruptions on other Canary Islands (e.g. La Palma, Gran Canaria, and Lanzarote). In fact, they resemble in texture xenoliths of various protoliths from volcanic areas worldwide (e.g. Krakatao, Indonesia, Cerro Quemado, Guatemala, Laacher See, Germany). This indicates that the process of partial melting and volatile exsolution, which the "restingolites" bear witness of, is probably occurring frequently during shallow crustal magma emplacement. Thermomechanical numerical models of the effect of the density decrease associated with the formation of vesicle networks in partially molten xenoliths show that xenoliths of crustal rocks initially sink in a magma chamber, but may start to float to the chamber roof once they start to heat up

  20. Volcanic alert system (VAS) developed during the 2011-2014 El Hierro (Canary Islands) volcanic process

    NASA Astrophysics Data System (ADS)

    García, Alicia; Berrocoso, Manuel; Marrero, José M.; Fernández-Ros, Alberto; Prates, Gonçalo; De la Cruz-Reyna, Servando; Ortiz, Ramón

    2014-06-01

    The 2011 volcanic unrest at El Hierro Island illustrated the need for a Volcanic Alert System (VAS) specifically designed for the management of volcanic crises developing after long repose periods. The VAS comprises the monitoring network, the software tools for analysis of the monitoring parameters, the Volcanic Activity Level (VAL) management, and the assessment of hazard. The VAS presented here focuses on phenomena related to moderate eruptions, and on potentially destructive volcano-tectonic earthquakes and landslides. We introduce a set of new data analysis tools, aimed to detect data trend changes, as well as spurious signals related to instrumental failure. When data-trend changes and/or malfunctions are detected, a watchdog is triggered, issuing a watch-out warning (WOW) to the Monitoring Scientific Team (MST). The changes in data patterns are then translated by the MST into a VAL that is easy to use and understand by scientists, technicians, and decision-makers. Although the VAS was designed specifically for the unrest episodes at El Hierro, the methodologies may prove useful at other volcanic systems.

  1. Driving magma to the surface: The 2011-2012 El Hierro Volcanic Eruption

    NASA Astrophysics Data System (ADS)

    López, Carmen; Benito-Saz, Maria A.; Martí, Joan; del-Fresno, Carmen; García-Cañada, Laura; Albert, Helena; Lamolda, Héctor

    2017-08-01

    We reanalyzed the seismic and deformation data corresponding to the preeruptive unrest on El Hierro (Canary Islands) in 2011. We considered new information about the internal structure of the island. We updated the seismic catalog to estimate the full evolution of the released seismic energy and demonstrate the importance of nonlocated earthquakes. Using seismic data and GPS displacements, we characterized the shear-tensile type of the predominant fracturing and modeled the strain and stress fields for different time periods. This enabled us to identify a prolonged first phase characterized by hydraulic tensile fracturing, which we interpret as being related to the emplacement of new magma below the volcanic edifice on El Hierro. This was followed by postinjection unidirectional migration, probably controlled by the stress field and the distribution of the structural discontinuities. We identified the effects of energetic magmatic pulses occurring a few days before the eruption that induced shear seismicity on preexisting faults within the volcano and raised the Coulomb stress over the whole crust. We suggest that these magmatic pulses reflect the crossing of the Moho discontinuity, as well as changes in the path geometry of the dyke migration toward the surface. The final phase involved magma ascent through a prefractured crust.

  2. Environmental monitoring of El Hierro Island submarine volcano, by combining low and high resolution satellite imagery

    NASA Astrophysics Data System (ADS)

    Eugenio, F.; Martin, J.; Marcello, J.; Fraile-Nuez, E.

    2014-06-01

    El Hierro Island, located at the Canary Islands Archipelago in the Atlantic coast of North Africa, has been rocked by thousands of tremors and earthquakes since July 2011. Finally, an underwater volcanic eruption started 300 m below sea level on October 10, 2011. Since then, regular multidisciplinary monitoring has been carried out in order to quantify the environmental impacts caused by the submarine eruption. Thanks to this natural tracer release, multisensorial satellite imagery obtained from MODIS and MERIS sensors have been processed to monitor the volcano activity and to provide information on the concentration of biological, chemical and physical marine parameters. Specifically, low resolution satellite estimations of optimal diffuse attenuation coefficient (Kd) and chlorophyll-a (Chl-a) concentration under these abnormal conditions have been assessed. These remote sensing data have played a fundamental role during field campaigns guiding the oceanographic vessel to the appropriate sampling areas. In addition, to analyze El Hierro submarine volcano area, WorldView-2 high resolution satellite spectral bands were atmospherically and deglinted processed prior to obtain a high-resolution optimal diffuse attenuation coefficient model. This novel algorithm was developed using a matchup data set with MERIS and MODIS data, in situ transmittances measurements and a seawater radiative transfer model. Multisensor and multitemporal imagery processed from satellite remote sensing sensors have demonstrated to be a powerful tool for monitoring the submarine volcanic activities, such as discolored seawater, floating material and volcanic plume, having shown the capabilities to improve the understanding of submarine volcanic processes.

  3. Nannofossils in 2011 El Hierro eruptive products reinstate plume model for Canary Islands

    NASA Astrophysics Data System (ADS)

    Zaczek, Kirsten; Troll, Valentin R.; Cachao, Mario; Ferreira, Jorge; Deegan, Frances M.; Carracedo, Juan Carlos; Soler, Vicente; Meade, Fiona C.; Burchardt, Steffi

    2015-01-01

    The origin and life cycle of ocean islands have been debated since the early days of Geology. In the case of the Canary archipelago, its proximity to the Atlas orogen led to initial fracture-controlled models for island genesis, while later workers cited a Miocene-Quaternary east-west age-progression to support an underlying mantle-plume. The recent discovery of submarine Cretaceous volcanic rocks near the westernmost island of El Hierro now questions this systematic age-progression within the archipelago. If a mantle-plume is indeed responsible for the Canaries, the onshore volcanic age-progression should be complemented by progressively younger pre-island sedimentary strata towards the west, however, direct age constraints for the westernmost pre-island sediments are lacking. Here we report on new age data obtained from calcareous nannofossils in sedimentary xenoliths erupted during the 2011 El Hierro events, which date the sub-island sedimentary rocks to between late Cretaceous and Pliocene in age. This age-range includes substantially younger pre-volcanic sedimentary rocks than the Jurassic to Miocene strata known from the older eastern islands and now reinstate the mantle-plume hypothesis as the most plausible explanation for Canary volcanism. The recently discovered Cretaceous submarine volcanic rocks in the region are, in turn, part of an older, fracture-related tectonic episode.

  4. Significant discharge of CO2 from hydrothermalism associated with the submarine volcano of El Hierro Island

    NASA Astrophysics Data System (ADS)

    Santana-Casiano, J. M.; Fraile-Nuez, E.; González-Dávila, M.; Baker, E. T.; Resing, J. A.; Walker, S. L.

    2016-05-01

    The residual hydrothermalism associated with submarine volcanoes, following an eruption event, plays an important role in the supply of CO2 to the ocean. The emitted CO2 increases the acidity of seawater. The submarine volcano of El Hierro, in its degasification stage, provided an excellent opportunity to study the effect of volcanic CO2 on the seawater carbonate system, the global carbon flux, and local ocean acidification. A detailed survey of the volcanic edifice was carried out using seven CTD-pH-ORP tow-yo studies, localizing the redox and acidic changes, which were used to obtain surface maps of anomalies. In order to investigate the temporal variability of the system, two CTD-pH-ORP yo-yo studies were conducted that included discrete sampling for carbonate system parameters. Meridional tow-yos were used to calculate the amount of volcanic CO2 added to the water column for each surveyed section. The inputs of CO2 along multiple sections combined with measurements of oceanic currents produced an estimated volcanic CO2 flux = 6.0 105 ± 1.1 105 kg d‑1 which is ~0.1% of global volcanic CO2 flux. Finally, the CO2 emitted by El Hierro increases the acidity above the volcano by ~20%.

  5. Significant discharge of CO2 from hydrothermalism associated with the submarine volcano of El Hierro Island

    PubMed Central

    Santana-Casiano, J. M.; Fraile-Nuez, E.; González-Dávila, M.; Baker, E. T.; Resing, J. A.; Walker, S. L.

    2016-01-01

    The residual hydrothermalism associated with submarine volcanoes, following an eruption event, plays an important role in the supply of CO2 to the ocean. The emitted CO2 increases the acidity of seawater. The submarine volcano of El Hierro, in its degasification stage, provided an excellent opportunity to study the effect of volcanic CO2 on the seawater carbonate system, the global carbon flux, and local ocean acidification. A detailed survey of the volcanic edifice was carried out using seven CTD-pH-ORP tow-yo studies, localizing the redox and acidic changes, which were used to obtain surface maps of anomalies. In order to investigate the temporal variability of the system, two CTD-pH-ORP yo-yo studies were conducted that included discrete sampling for carbonate system parameters. Meridional tow-yos were used to calculate the amount of volcanic CO2 added to the water column for each surveyed section. The inputs of CO2 along multiple sections combined with measurements of oceanic currents produced an estimated volcanic CO2 flux = 6.0 105 ± 1.1 105 kg d−1 which is ~0.1% of global volcanic CO2 flux. Finally, the CO2 emitted by El Hierro increases the acidity above the volcano by ~20%. PMID:27157062

  6. Heterogeneous vesiculation of 2011 El Hierro xeno-pumice revealed by X-ray computed microtomography

    NASA Astrophysics Data System (ADS)

    Berg, S. E.; Troll, V. R.; Deegan, F. M.; Burchardt, S.; Krumbholz, M.; Mancini, L.; Polacci, M.; Carracedo, J. C.; Soler, V.; Arzilli, F.; Brun, F.

    2016-12-01

    During the first week of the 2011 El Hierro submarine eruption, abundant light-coloured pumiceous, high-silica volcanic bombs coated in dark basanite were found floating on the sea. The composition of the light-coloured frothy material (`xeno-pumice') is akin to that of sedimentary rocks from the region, but the textures resemble felsic magmatic pumice, leaving their exact mode of formation unclear. To help decipher their origin, we investigated representative El Hierro xeno-pumice samples using X-ray computed microtomography for their internal vesicle shapes, volumes, and bulk porosity, as well as for the spatial arrangement and size distributions of vesicles in three dimensions (3D). We find a wide range of vesicle morphologies, which are especially variable around small fragments of rock contained in the xeno-pumice samples. Notably, these rock fragments are almost exclusively of sedimentary origin, and we therefore interpret them as relicts an the original sedimentary ocean crust protolith(s). The irregular vesiculation textures observed probably resulted from pulsatory release of volatiles from multiple sources during xeno-pumice formation, most likely by successive release of pore water and mineral water during incremental heating and decompression of the sedimentary protoliths.

  7. Significant discharge of CO2 from hydrothermalism associated with the submarine volcano of El Hierro Island.

    PubMed

    Santana-Casiano, J M; Fraile-Nuez, E; González-Dávila, M; Baker, E T; Resing, J A; Walker, S L

    2016-05-09

    The residual hydrothermalism associated with submarine volcanoes, following an eruption event, plays an important role in the supply of CO2 to the ocean. The emitted CO2 increases the acidity of seawater. The submarine volcano of El Hierro, in its degasification stage, provided an excellent opportunity to study the effect of volcanic CO2 on the seawater carbonate system, the global carbon flux, and local ocean acidification. A detailed survey of the volcanic edifice was carried out using seven CTD-pH-ORP tow-yo studies, localizing the redox and acidic changes, which were used to obtain surface maps of anomalies. In order to investigate the temporal variability of the system, two CTD-pH-ORP yo-yo studies were conducted that included discrete sampling for carbonate system parameters. Meridional tow-yos were used to calculate the amount of volcanic CO2 added to the water column for each surveyed section. The inputs of CO2 along multiple sections combined with measurements of oceanic currents produced an estimated volcanic CO2 flux = 6.0 10(5) ± 1.1 10(5 )kg d(-1) which is ~0.1% of global volcanic CO2 flux. Finally, the CO2 emitted by El Hierro increases the acidity above the volcano by ~20%.

  8. Nannofossils in 2011 El Hierro eruptive products reinstate plume model for Canary Islands.

    PubMed

    Zaczek, Kirsten; Troll, Valentin R; Cachao, Mario; Ferreira, Jorge; Deegan, Frances M; Carracedo, Juan Carlos; Soler, Vicente; Meade, Fiona C; Burchardt, Steffi

    2015-01-22

    The origin and life cycle of ocean islands have been debated since the early days of Geology. In the case of the Canary archipelago, its proximity to the Atlas orogen led to initial fracture-controlled models for island genesis, while later workers cited a Miocene-Quaternary east-west age-progression to support an underlying mantle-plume. The recent discovery of submarine Cretaceous volcanic rocks near the westernmost island of El Hierro now questions this systematic age-progression within the archipelago. If a mantle-plume is indeed responsible for the Canaries, the onshore volcanic age-progression should be complemented by progressively younger pre-island sedimentary strata towards the west, however, direct age constraints for the westernmost pre-island sediments are lacking. Here we report on new age data obtained from calcareous nannofossils in sedimentary xenoliths erupted during the 2011 El Hierro events, which date the sub-island sedimentary rocks to between late Cretaceous and Pliocene in age. This age-range includes substantially younger pre-volcanic sedimentary rocks than the Jurassic to Miocene strata known from the older eastern islands and now reinstate the mantle-plume hypothesis as the most plausible explanation for Canary volcanism. The recently discovered Cretaceous submarine volcanic rocks in the region are, in turn, part of an older, fracture-related tectonic episode.

  9. Nannofossils in 2011 El Hierro eruptive products reinstate plume model for Canary Islands

    PubMed Central

    Zaczek, Kirsten; Troll, Valentin R.; Cachao, Mario; Ferreira, Jorge; Deegan, Frances M.; Carracedo, Juan Carlos; Soler, Vicente; Meade, Fiona C.; Burchardt, Steffi

    2015-01-01

    The origin and life cycle of ocean islands have been debated since the early days of Geology. In the case of the Canary archipelago, its proximity to the Atlas orogen led to initial fracture-controlled models for island genesis, while later workers cited a Miocene-Quaternary east-west age-progression to support an underlying mantle-plume. The recent discovery of submarine Cretaceous volcanic rocks near the westernmost island of El Hierro now questions this systematic age-progression within the archipelago. If a mantle-plume is indeed responsible for the Canaries, the onshore volcanic age-progression should be complemented by progressively younger pre-island sedimentary strata towards the west, however, direct age constraints for the westernmost pre-island sediments are lacking. Here we report on new age data obtained from calcareous nannofossils in sedimentary xenoliths erupted during the 2011 El Hierro events, which date the sub-island sedimentary rocks to between late Cretaceous and Pliocene in age. This age-range includes substantially younger pre-volcanic sedimentary rocks than the Jurassic to Miocene strata known from the older eastern islands and now reinstate the mantle-plume hypothesis as the most plausible explanation for Canary volcanism. The recently discovered Cretaceous submarine volcanic rocks in the region are, in turn, part of an older, fracture-related tectonic episode. PMID:25609055

  10. Bone cadmium and lead in the ancient population from El Hierro, Canary Islands.

    PubMed

    González-Reimers, E; Arnay-de-la-Rosa, M; Velasco-Vázquez, J; Galindo-Martín, L; Santolaria-Fernández, F

    2005-01-01

    This study was performed to determine the levels of lead (Pb) and cadmium (Cd) in 63 bone samples of the prehispanic population of the island El Hierro, comparing them with the values obtained on 98 prehispanic samples from Tenerife, Fuerteventura, Gran Canaria, and La Palma, all of them in the Canary Islands, and with eight modern samples who served as controls. Prehispanic individuals from El Hierro showed the lowest bone Pb values of all the archipelago (0.72+/-1.01 mg/kg), significantly different (F=6.9, p<0.001) from the values obtained for the population of other islands such as Tenerife (4.87+/-5.36 mg/kg) or Fuerteventura (4.45+/-7.85 mg/kg) and also from those of the modern population (30.53+/-14.62 mg/kg). On the other hand, bone Cd, although slightly lower in the ancient population groups, was not significantly different when compared with the modern one. In addition, no differences were observed in bone Cd among the ancient population of the different islands. Bone lead but not cadmium kept an inverse significant relationship with the distance of the burial site both to south Spain (r=-0.31) and Atlantic Morocco (r=-0.28, p<0.001 in both cases).

  11. Palaeomagnetic constraints on the age of Lomo Negro volcanic eruption (El Hierro, Canary Islands)

    NASA Astrophysics Data System (ADS)

    Villasante-Marcos, Víctor; Pavón-Carrasco, Francisco Javier

    2014-12-01

    A palaeomagnetic study has been carried out in 29 cores drilled at six different sites from the volcanic products of Lomo Negro eruption (El Hierro, Canary Islands, Spain). Systematic thermal and alternating field demagnetization of the samples' natural remanent magnetization revealed a northward, stable palaeomagnetic direction similar in all the samples. Rock magnetic experiments indicate that this palaeomagnetic component is carried by a mixture of high-Ti and low-Ti titanomagnetite crystals typical of basaltic lithologies that have experienced a significant degree of oxyexsolution during subaerial cooling. The well constrained palaeomagnetic direction of Lomo Negro lavas was used to perform a palaeomagnetic dating of the volcanic event, using the SHA.DIF.14k global geomagnetic model restricted for the last 3000 yr. It can be unambiguously concluded that Lomo Negro eruption occurred well before the previously proposed date of 1793 AD, with three different age ranges being statistically possible during the last 3 ka: 115 BC-7 AD, 410-626 AD and 1499-1602 AD. The calibration of a previously published non-calibrated 14C dating suggests a XVI c. date for Lomo Negro eruption. This conclusion leaves open the possibility that the seismic crisis occurred at El Hierro in 1793 AD was related to an intrusive magmatic event that either did not reach the surface or either culminated in an unregistered submarine eruption similar to the one occurred in 2011-2012 at the southern off-shore ridge of the island.

  12. Sr-Nd-Pb isotope data for ultramafic xenoliths from Hierro, Canary Islands: Melt infiltration processes in the upper mantle

    NASA Astrophysics Data System (ADS)

    Whitehouse, M. J.; Neumann, E.-R.

    1995-03-01

    We present here Sr, Nd, and Pb-isotopic data from harzburgite (group I) and dunite-pyroxenite (group II) suite mantle xenoliths from the island of Hierro, one of the youngest and westernmost of the Canary Islands. A progressive leaching technique has been developed and applied to the whole-rock powder samples in order to identify and remove as far as possible any recent additions (host basalt and/or sea-water). Isotopic analyses of the leached residues show significant systematic differences between these two suites. Dunite-pyroxenite suite xenoliths (olivine pyroxenites, dunites and wehrlites) exhibit a relatively small range of isotopic compositions (87Sr/86Sr from 0.70292 to 0.70315; 143Nd/144Nd from 0.51295 to 0.51302; 206Pb/204Pb from 19.18 to 19.40) compared to the harzburgite suite (87Sr/86Sr from 0.70295 to 0.70320; 143Nd/144Nd from 0.51285 to 0.51296; 206Pb/204Pb from 18.85 to 19.41). In all isotope correlation diagrams the leached dunite-pyroxenite suite xenoliths plot between the Hierro basalt field and a hypothetical depleted mantle suggesting that these xenoliths may have been strongly infiltrated by Hierro-type basalt. Progressive leaching of this suite of samples showed removal of a component with more enriched Sr (higher 87Sr/86Sr relative to depleted mantle) and Nd (lower 143Nd/144Nd) isotopic compositions that is probably host basalt glass. The leached harzburgite suite xenoliths extend to more enriched Sr and Nd isotopic compositions than Hierro-type basalt but always have more depleted Pb. This relationship can best be explained if this suite has been subject to infiltration by earlier magmas of the Canary Island suite (in particular, those from Gran Canaria show appropriate compositional ranges), although additional infiltration by Hierro basalt cannot be ruled out. The leaching experiments for this suite mostly show removal of a radiogenic Sr component only (? seawater) which supports the interpretation of early infiltration and subsequent

  13. Origin of three-armed rifts in volcanic islands: the case of El Hierro (Canary Islands)

    NASA Astrophysics Data System (ADS)

    Galindo Jiménez, Inés; Becerril Carretero, Laura; Martí Molist, Joan; Gudmundsson, Agust

    2015-04-01

    Rifts zones in volcanic oceanic islands are common structures that have been explained through several theories/models. However, despite all these models it is as yet unclear whether it is the intense intrusive activity or the sector collapses that actually control the structural evolution and geometry of oceanic-island rift zones. Here we provide a new hypothesis to explain the origin and characteristics of the feeding system of oceanic-island rift zones based on the analysis of more than 1700 surface, subsurface (water galleries), and submarine structural data from El Hierro (Canary Islands). El Hierro's geological structure is primarily controlled by a three-armed rift-zone, the arms striking NE, WSW and S. Between the rift axes there are three valleys formed during huge landslides: El Golfo, El Julan, and Las Playas. Our results show: (1) a predominant NE-SW strike of structural elements, which coincides with the main regional trend of the Canary Archipelago as a whole; (2) a clear radial strike distribution of structural elements for the whole volcanic edifice (including submarine flanks) with respect to the centre of the island; (3) that the rift zones are mainly subaerial structures and do not propagate through the submarine edifice; (4) that it is only in the NE rift that structures have a general strike similar to that of the rift as a whole, and; (5) that in the W and S rifts there is not clear main direction, showing the structural elements in the W rift a fan distribution coinciding with the general radial pattern in the island as a whole. Based on these data, we suggest that the radial-striking structures reflect comparatively uniform stress fields that operated during the constructive episodes, mainly conditioned by the combination of overburden pressure, gravitational spreading, and magma-induced stresses. By contrast, in the shallower parts of the edifice, that is, the NE-SW, N-S and WNW-ESE-striking structures, reflect local stress fields related

  14. The natural ocean acidification and fertilization event caused by the submarine eruption of El Hierro

    NASA Astrophysics Data System (ADS)

    Santana-Casiano, J. M.; González-Dávila, M.; Fraile-Nuez, E.; de Armas, D.; González, A. G.; Domínguez-Yanes, J. F.; Escánez, J.

    2013-01-01

    The shallow submarine eruption which took place in October 10th 2011, 1.8 km south of the island of El Hierro (Canary Islands) allowed the study of the abrupt changes in the physical-chemical properties of seawater caused by volcanic discharges. In order to monitor the evolution of these changes, seven oceanographic surveys were carried out over six months (November 2011-April 2012) from the beginning of the eruptive stage to the post-eruptive phase. Here, we present dramatic changes in the water column chemistry including large decreases in pH, striking effects on the carbonate system, decreases in the oxygen concentrations and enrichment of Fe(II) and nutrients. Our findings highlight that the same volcano which was responsible for the creation of a highly corrosive environment, affecting marine biota, has also provided the nutrients required for the rapid recuperation of the marine ecosystem.

  15. The natural ocean acidification and fertilization event caused by the submarine eruption of El Hierro.

    PubMed

    Santana-Casiano, J M; González-Dávila, M; Fraile-Nuez, E; de Armas, D; González, A G; Domínguez-Yanes, J F; Escánez, J

    2013-01-01

    The shallow submarine eruption which took place in October 10(th) 2011, 1.8 km south of the island of El Hierro (Canary Islands) allowed the study of the abrupt changes in the physical-chemical properties of seawater caused by volcanic discharges. In order to monitor the evolution of these changes, seven oceanographic surveys were carried out over six months (November 2011-April 2012) from the beginning of the eruptive stage to the post-eruptive phase. Here, we present dramatic changes in the water column chemistry including large decreases in pH, striking effects on the carbonate system, decreases in the oxygen concentrations and enrichment of Fe(II) and nutrients. Our findings highlight that the same volcano which was responsible for the creation of a highly corrosive environment, affecting marine biota, has also provided the nutrients required for the rapid recuperation of the marine ecosystem.

  16. Parasite fauna of rodents (Murinae) from El Hierro (Canary Islands, Spain): a multidisciplinary approach.

    PubMed

    Feliu, Carlos; López, Mercedes; Gómez, María S; Torres, Jordi; Sánchez, Santiago; Miquel, Jordi; Abreu-Acosta, Néstor; Segovia, Juan M; Martín-Alonso, Aarón; Montoliu, Isabel; Villa, Mercedes; Fernández-Álvarez, Angela; Bakhoum, Abdoulaye J S; Valladares, Basilio; Orós, Jorge; Foronda, Pilar

    2012-06-01

    The parasite fauna (protozoa, helminths and insects) of the two most widespread Murinae rodents in El Hierro (Canary Islands, Spain), the black rat (Rattus rattus) and the house mouse (Mus musculus domesticus) was studied. Faunistic, ecological, ecotoxicological data, as well as information on the biology of some nematode parasites of R. rattus are provided. The present work is unprecedented in the Canary Islands, and provides the first data on the parasite biodiversity in Murinae from the archipelago. Concerning to parasitofaunas stands out: a) impoverishment of biodiversity of helminths respect of which have the same hosts in other islands; b) increasing the number of species of Siphonaptera, even compared with flea species that parasitize the same hosts from continental biotopes.

  17. Radiopaque transverse lines (Harris lines) in the prehispanic population of El Hierro (Canary Islands).

    PubMed

    Arnay-de-la Rosa, M; González-Reimers, E; Castilla-Garcia, A; Santolaria-Fernandez, F

    1994-03-01

    Harris lines were assessed in 48 right tibiae of prehispanic inhabitants of El Hierro (one of the Canary Islands), belonging to 23 adult females and 25 adult males. No Harris lines were detected in sixteen (33%) of the adult individuals (7 females = 30% and 9 males = 36%), these differences are not statistically significant. Female tibiae showed a slightly higher mean number of Harris lines at the distal end than male ones (2.091 +/- 1.9 in females vs 1.417 +/- in males). Ages at which Harris lines were formed show two peaks, a major one at the age of 2 years, and another one between 11 and 13, particularly in the females. Harris lines were more frequently observed at the proximal than at the distal end of the bone. No relation was found between the number of Harris lines and stature. The relative high number of lines detected in our population speak for several stressful episodes suffered during growth.

  18. The natural ocean acidification and fertilization event caused by the submarine eruption of El Hierro

    PubMed Central

    Santana-Casiano, J. M.; González-Dávila, M.; Fraile-Nuez, E.; de Armas, D.; González, A. G.; Domínguez-Yanes, J. F.; Escánez, J.

    2013-01-01

    The shallow submarine eruption which took place in October 10th 2011, 1.8 km south of the island of El Hierro (Canary Islands) allowed the study of the abrupt changes in the physical-chemical properties of seawater caused by volcanic discharges. In order to monitor the evolution of these changes, seven oceanographic surveys were carried out over six months (November 2011-April 2012) from the beginning of the eruptive stage to the post-eruptive phase. Here, we present dramatic changes in the water column chemistry including large decreases in pH, striking effects on the carbonate system, decreases in the oxygen concentrations and enrichment of Fe(II) and nutrients. Our findings highlight that the same volcano which was responsible for the creation of a highly corrosive environment, affecting marine biota, has also provided the nutrients required for the rapid recuperation of the marine ecosystem. PMID:23355953

  19. Soil gas 222Rn and volcanic activity at El Hierro (Canary Islands) before and after the 2011 submarine eruption

    NASA Astrophysics Data System (ADS)

    Padilla, G.; Hernández, P. A.; Padrón, E.; Barrancos, J.; Melián, G.; Dionis, S.; Rodríguez, F.; Nolasco, D.; Calvo, D.; Hernández, I.; Pereza, M. D.; Pérez, N. M.

    2012-04-01

    El Hierro (278 km2) is the southwesternmost island of the Canarian archipelago. From June 19, 2011 to January 2012, more than 11,950 seismic events have been detected by the seismic network of IGN. On 10 October 2011 the earthquake swarm changed its behaviour and produced a harmonic tremor due to magma movement, indicating that a submarine eruption located at 2 km south of La Restinga had started which is still in progress. Since 2003, the ITER Environmental Research Division now integrated in the Instituto Volcanológico de Canarias, INVOLCAN, has regularly performed soil gas surveys at El Hierro as a geochemical tool for volcanic surveillance. Among the investigated gases, soil gas radon (222Rn) and thoron (220Rn) have played a special attention. Both gases are characterized to ascend towards the surface mainly through cracks or faults via diffusion or advection, mechanisms dependent of both soil porosity and permeability, which in turn vary as a function of the stress/strain changes at depth. Years before the starts of the volcanic-seismic crisis on July 17, 2011, a volcanic multidisciplinary surveillance program was implemented at El Hierro including discrete and continuous measurements of 222Rn and 220Rn. Two soil gas 222Rn surveys had been carried out at El Hierro in 2003 and 2011, and four continuous geochemical monitoring stations for 222Rn and 220Rn measurements had been installed (HIE02, HIE03, HIE04 and HIE08). Soil gas 222Rn surveys were carried out at the surface environment of El Hierro after selecting 600 sampling observation sites (about 40 cm depth). Geochemical stations measure 222Rn and 220Rn activities by pumping the gas from a PVC pipe inserted 1m in the ground and thermally isolated. The results of the 2003 and 2011 soil gas 222Rn surveys show clearly a relatively higher observed 222Rn activities in the surface environment on 2011 than those observed on 2003 when no anomalous seismicity were taking place beneath El Hierro. The observed

  20. Characterization of the seismicity prior to the 2011 El Hierro eruption

    NASA Astrophysics Data System (ADS)

    Domínguez Cerdeña, Itahiza; del Fresno, Carmen; Gomis Moreno, Almudena; Hernández Yanes, Paula; Meletlidis, Stavros; López, Carmen

    2014-05-01

    The last eruption of the Canary Islands started on 10 October 2011, 2 km south of El Hierro. This submarine eruption was the first fully monitored volcanic eruption in this archipelago and was preceded by various precursory signals, the most evident of which was the seismicity that started in July 2011. This seismicity includes almost 10,000 low-magnitude earthquakes located during 81 days before the eruption which revealed a 20 km horizontal migration from the north of the island to the south at depths of between 10 and 17 km, the deeper events occurring further south. In this work we try to improve the quality of the seismic catalogue. We applied a relative location algorithm (hypoDD) to improve hypocentral locations. Tests performed to check the reliability of the results gave maximum uncertainties of 400 m in the relocations. Furthermore, new features were found, including the origin of the seismicity in the center of the island and the presence of two alternating seismogenic zones in the north of the island during the first month of activity. The first days of the unrest the seismic network was composed by only 2 seismic stations and almost no location was possible. We obtained information about location and magnitude of these events at the beginning of the seismic crisis by comparison of the waveforms by correlation with located earthquakes. We have also analyzed the baselevel seismicity of El Hierro from 1996 using digital data of a short period station. Manual revision of these data showed a considerably low number of earthquakes in the region before the unrest (less than one event per day).

  1. Multiparametric statistical investigation of seismicity occurred at El Hierro (Canary Islands) from 2011 to 2014

    NASA Astrophysics Data System (ADS)

    Telesca, Luciano; Lovallo, Michele; Lopez, Carmen; Marti Molist, Joan

    2016-03-01

    A detailed statistical investigation of the seismicity occurred at El Hierro volcano (Canary Islands) from 2011 to 2014 has been performed by analysing the time variation of four parameters: the Gutenberg-Richter b-value, the local coefficient of variation, the scaling exponent of the magnitude distribution and the main periodicity of the earthquake sequence calculated by using the Schuster's test. These four parameters are good descriptors of the time and magnitude distributions of the seismic sequence, and their variation indicate dynamical changes in the volcanic system. These variations can be attributed to the causes and types of seismicity, thus allowing to distinguish between different host-rock fracturing processes caused by intrusions of magma at different depths and overpressures. The statistical patterns observed among the studied unrest episodes and between them and the eruptive episode of 2011-2012 indicate that the response of the host rock to the deformation imposed by magma intrusion did not differ significantly from one episode to the other, thus suggesting that no significant local stress changes induced by magma intrusion occurred when comparing between all them. Therefore, despite the studied unrest episodes were caused by intrusions of magma at different depths and locations below El Hierro island, the mechanical response of the lithosphere was similar in all cases. This suggests that the reason why the first unrest culminated in an eruption while the other did not, may be related to the role of the regional/local tectonics acting at that moment, rather than to the forceful of magma intrusion.

  2. Floating sandstones off El Hierro (Canary Islands, Spain): the peculiar case of the October 2011 eruption

    NASA Astrophysics Data System (ADS)

    Troll, V. R.; Klügel, A.; Longpré, M.-A.; Burchardt, S.; Deegan, F. M.; Carracedo, J. C.; Wiesmaier, S.; Kueppers, U.; Dahren, B.; Blythe, L. S.; Hansteen, T.; Freda, C.; Budd, D. A.; Jolis, E. M.; Jonsson, E.; Meade, F.; Berg, S.; Mancini, L.; Polacci, M.

    2011-12-01

    The eruption that started off the south coast of El Hierro, Canary Islands, in October 2011 has emitted intriguing eruption products found floating in the sea. These specimens appeared as floating volcanic "bombs" that have in the meantime been termed "restingolites" (after the close-by village of La Restinga) and exhibit cores of white and porous pumice-like material. Currently the nature and origin of these "floating stones" is vigorously debated among researchers, with important implications for the interpretation of the hazard potential of the ongoing eruption. The "restingolites" have been proposed to be either (i) juvenile high-silica magma (e.g. rhyolite), (ii) remelted magmatic material (trachyte), (iii) altered volcanic rock, or (iv) reheated hyaloclastites or zeolite from the submarine slopes of El Hierro. Here, we provide evidence that supports yet a different conclusion. We have collected and analysed the structure and composition of samples and compared the results to previous work on similar rocks found in the archipelago. Based on their high silica content, the lack of igneous trace element signatures, and the presence of remnant quartz crystals, jasper fragments and carbonate relicts, we conclude that "restingolites" are in fact xenoliths from pre-island sedimentary rocks that were picked up and heated by the ascending magma causing them to partially melt and vesiculate. They hence represent messengers from depth that help us to understand the interaction between ascending magma and crustal lithologies in the Canary Islands as well as in similar Atlantic islands that rest on sediment/covered ocean crust (e.g. Cape Verdes, Azores). The occurrence of these "restingolites" does therefore not indicate the presence of an explosive high-silica magma that is involved in the ongoing eruption.

  3. Osteoarthritis among the prehispanic population from La Gomera and El Hierro (Canary Islands): a comparative study.

    PubMed

    Castañeyra-Ruiz, María; Trujillo-Mederos, Aioze; Arnay-de-la-Rosa, Matilde; González-Reimers, Emilio

    2015-01-01

    The pathogenesis of osteoarthritis is still unclear, and several factors may play a role in its development, including joint trauma or microtrauma (usually related to lifestyle), local inflammation, loading charge, and genetics. Assessment of osteoarthritis among ancient populations is important, since it may yield information relative to life habits. Therefore, we have performed the present study in order to assess the prevalence of osteoarthritis among the prehispanic populations from La Gomera and El Hierro, two islands of the Canary Archipelago with a similar size and altitude which were colonized by individuals of North African origin about 2000 - 2500 years ago. The economy of these people was based on goat herding, shellfishing, and agriculture together with consumption of some wild vegetal species. However, despite a similar geographic environment and a similar economic pattern, prevalence of osteoarthritis was by far higher among the population from La Gomera (78.57 % vs 15.85 %, p < 0.001), and that of eburnation, 11.65 % and 1.05 %, respectively (p = 0.016); in contrast, the population of El Hierro was markedly more robust than that of La Gomera. Globally, a trend to an inverse relationship was observed between epiphyseal robusticity index and the presence of osteoarthritis, which was statistically significant when only men were analysed. However, after performing a multivariate analysis, the only factor that was independently related to the presence of osteoarthritis was the variable "island" (i.e., population group), suggesting that - possibly - genetic factors played a major role in the differences observed.

  4. Observations of coupled seismicity and ground deformation at El Hierro Island (2011-2014)

    NASA Astrophysics Data System (ADS)

    Gonzalez, P. J.

    2015-12-01

    New insights into the magma storage and evolution at oceanic island volcanoes are now being achieved using remotely sensed space geodetic techniques, namely satellite radar interferometry. Differential radar interferometry is a technique tracking, at high spatial resolution, changes in the travel-time (distance) from the satellites to the ground surface, having wide applications in Earth sciences. Volcanic activity usually is accompanied by surface ground deformation. In many instances, modelling of surface deformation has the great advantage to estimate the magma volume change, a particularly interesting parameter prior to eruptions. Jointly interpreted with petrology, degassing and seismicity, it helps to understand the crustal magmatic systems as a whole. Current (and near-future) radar satellite missions will reduce the revisit time over global sub-aerial volcanoes to a sub-weekly basis, which will increase the potential for its operational use. Time series and filtering processing techniques of such streaming data would allow to track subsurface magma migration with high precision, and frequently update over vast areas (volcanic arcs, large caldera systems, etc.). As an example for the future potential monitoring scenario, we analyze multiple satellite radar data over El Hierro Island (Canary Islands, Spain) to measure and model surface ground deformation. El Hierro has been active for more than 3 years (2011 to 2014). Initial phases of the unrest culminated in a submarine eruption (late 2011 - early 2012). However, after the submarine eruption ended, its magmatic system still active and affected by pseudo-regular energetic seismic swarms, accompanied by surface deformation without resumed eruptions. Such example is a great opportunity to understand the crustal magmatic systems in low magma supply-rate oceanic island volcanoes. This new approach to measure surface deformation processes is yielding an ever richer level of information from volcanology to

  5. Acanthamoeba genotypes T2, T4, and T11 in soil sources from El Hierro island, Canary Islands, Spain.

    PubMed

    Reyes-Batlle, María; Zamora-Herrera, Jonadab; Vargas-Mesa, Alejandro; Valerón-Tejera, Marco Antonio; Wagner, Carolina; Martín-Navarro, Carmen Ma; López-Arencibia, Atteneri; Sifaoui, Ines; Martínez-Carretero, Enrique; Valladares, Basilio; Piñero, José E; Lorenzo-Morales, Jacob

    2016-08-01

    The genus Acanthamoeba includes pathogenic strains which are causative agents of keratitis and encephalitis that often may end fatal in humans and other animals. In the present study, forty soil samples were collected in the island of El Hierro, Canary Islands, Spain, and checked for the presence of Acanthamoeba. Samples were cultivated onto 2 % non-nutrient agar plates seeded with a layer of heat killed Escherichia coli. Amplification by PCR and sequencing of the DF3 region of the 18S rDNA of Acanthamoeba was carried out in order to confirm morphological identification of the amoebae. Furthermore, Acanthamoeba spp. was isolated from 47.5 % of soil samples. Moreover, genotypes T2, T4, and T11 were identified in these samples. To the best of our knowledge, this is the first study to establish genotypes T2, T4, and T11 in soil sources from El Hierro island.

  6. Time lag between deformation and seismicity along monogenetic volcanic unrest periods: The case of El Hierro Island (Canary Islands)

    NASA Astrophysics Data System (ADS)

    Lamolda, Héctor; Felpeto, Alicia; Bethencourt, Abelardo

    2017-07-01

    Between 2011 and 2014 there were at least seven episodes of magmatic intrusion in El Hierro Island, but only the first one led to a submarine eruption in 2011-2012. In order to study the relationship between GPS deformation and seismicity during these episodes, we compare the temporal evolution of the deformation with the cumulative seismic energy released. In some of the episodes both deformation and seismicity evolve in a very similar way, but in others a time lag appears between them, in which the deformation precedes the seismicity. Furthermore, a linear correlation between decimal logarithm of intruded magma volume and decimal logarithm of total seismic energy released along the different episodes has been observed. Therefore, if a future magmatic intrusion in El Hierro Island follows this behavior with a proper time lag, we could have an a priori estimate on the order of magnitude the seismic energy released would reach.

  7. Study of the thermohygrometric conditions of Juniperus turbinata habitat in the island of El Hierro (Canary Islands)

    NASA Astrophysics Data System (ADS)

    Salva-Catarineu, Montserrat; Salvador-Franch, Ferran; López-Bustins, Joan Albert; Padrón-Padrón, Perdro A.; Cortés-Lucas, Amparo

    2015-04-01

    The biggest population of Juniperus turbinata throughout the Canary Islands is located in the island of El Hierro. The current extent of juniper woodlands is very small compared with the potential distribution due to heavy exploitation for centuries. Nowadays, the recovery of its natural habitat has such a high environmental and scenic interest since this is a protected species in Europe; however, an improved understanding of the environmental factors that help or limit its recovery is indispensable. Under the JUNITUR project the populations of juniper woodlands in El Hierro are being studied, which are subjected to highly different environments. These environments are mainly determined by their altitude and exposure to NE trade winds. The main objective of this study is to compare the thermohygrometric conditions of three juniper woodlands, located at different altitude and orientation in El Hierro, which present different recovery rates. We are currently using air sensor data loggers fixed to tree branches for recording hourly temperature and humidity data in the three study areas. For this preliminary approach, we analyse daily data of two annual cycles (from September 2012 to August 2014). Our first results show similar thermohygrometric annual cycles among the three study areas. The largest differences are detected in winter temperature and summer humidity between the north (to windward) and south (to leeward) faces of the island. The juniper woodland with a highest recovery rate shows the most extreme temperature conditions in both winter and summer seasons. This last juniper woodland is located leeward to trade winds at 996 m a.s.l. In general terms, the results of this research project might contribute to the knowledge of the juniper bioclimatology in the westernmost of the Canary Islands. Key words: bioclimatology, El Hierro, habitat, Juniperus turbinata, protected species

  8. Analysis of surface deformation during the eruptive process of El Hierro Island (Canary Islands, Spain): Detection, Evolution and Forecasting.

    NASA Astrophysics Data System (ADS)

    Berrocoso, M.; Fernandez-Ros, A.; Prates, G.; Martin, M.; Hurtado, R.; Pereda, J.; Garcia, M. J.; Garcia-Cañada, L.; Ortiz, R.; Garcia, A.

    2012-04-01

    The surface deformation has been an essential parameter for the onset and evolution of the eruptive process of the island of El Hierro (October 2011) as well as for forecasting changes in seismic and volcanic activity during the crisis period. From GNSS-GPS observations the reactivation is early detected by analizing the change in the deformation of the El Hierro Island regional geodynamics. It is found that the surface deformation changes are detected before the occurrence of seismic activity using the station FRON (GRAFCAN). The evolution of the process has been studied by the analysis of time series of topocentric coordinates and the variation of the distance between stations on the island of El Hierro (GRAFCAN station;IGN network; and UCA-CSIC points) and LPAL-IGS station on the island of La Palma. In this work the main methodologies and their results are shown: •The location (and its changes) of the litospheric pressure source obtained by applying the Mogi model. •Kalman filtering technique for high frequency time series, used to make the forecasts issued for volcanic emergency management. •Correlations between deformation of the different GPS stations and their relationship with seismovolcanic settings.

  9. Precursory geophysical, geodetic and geochemical signatures of a new 2012 submarine eruption off the northwestern coast of El Hierro, Canary Islands, Spain

    NASA Astrophysics Data System (ADS)

    Pérez, Nemesio M.; Somoza, Luis; González de Vallejo, Luis; Sagiya, Takeshi; León, Ricardo; Hernández, Pedro A.; Biain, Ander; González, Francisco J.; Medialdea, Teresa; Gonzalez-Aller, Daniel; Sánchez de La Madrid, José Luis; Barrancos, José; Ibáñez, Jesús M.; Sumino, Hirochika

    2013-04-01

    Here we report precursory geophysical, geodetic, and geochemical signatures of a new submarine eruption off the northwestern coast of El Hierro, Canary Islands, which has been detected through acoustic imaging of submarine plumes on June 27, 2012, by the Spanish research vessel "Hespérides". Five distinct acoustic submarine plumes have been recognized in this area at water depths between 64 and 88 m along a submarine platform located in front of the Lomo Negro volcanic cone, northwestern of El Hierro. Submarine plums are characterized by vertical columns of high-amplitude values rising from seafloor. These acoustic imaging data clearly support a new submarine eruption in 2012 associated to the recent magmatic reactivation of El Hierro volcanic system. This new eruption event was preceded by several precursory signatures: (i) a sharp increase of the seismic energy release and the number of daily earthquakes of magnitude ≥ 2.5 on June 25, 2012, (ii) significant vertical and horizontal displacements observed at the Canary Islands GPS permanent network (Nagoya University-ITER-GRAFCAN) at El Hierro with uplifts up to 3 cm from June 25 to 26, 2012, (iii) an anomalous increase of the soil gas radon activity at HIE02, a geochemical station located in the northwestern of El Hierro, from the end of April until the beginning of June reaching peak values of 2.7 kBq/m3 on June 3, 2012, and (iv) the highest observed corrected value of 3He/4He ratio in ground waters (8,5 Ra) from San Simón well at the northwestern of El Hierro on June 16, 2012. These precursory signals have revealed important to improve and optimize the detection of early warning signals of volcanic unrest episodes at El Hierro.

  10. Evidence from acoustic imaging for submarine volcanic activity in 2012 off the west coast of El Hierro (Canary Islands, Spain)

    NASA Astrophysics Data System (ADS)

    Pérez, Nemesio M.; Somoza, Luis; Hernández, Pedro A.; de Vallejo, Luis González; León, Ricardo; Sagiya, Takeshi; Biain, Ander; González, Francisco J.; Medialdea, Teresa; Barrancos, José; Ibáñez, Jesús; Sumino, Hirochika; Nogami, Kenji; Romero, Carmen

    2014-12-01

    We report precursory geophysical, geodetic, and geochemical signatures of a new submarine volcanic activity observed off the western coast of El Hierro, Canary Islands. Submarine manifestation of this activity has been revealed through acoustic imaging of submarine plumes detected on the 20-kHz chirp parasound subbottom profiler (TOPAS PS18) mounted aboard the Spanish RV Hespérides on June 28, 2012. Five distinct "filament-shaped" acoustic plumes emanating from the flanks of mounds have been recognized at water depth between 64 and 88 m on a submarine platform located NW El Hierro. These plumes were well imaged on TOPAS profiles as "flares" of high acoustic contrast of impedance within the water column. Moreover, visible plumes composed of white rafts floating on the sea surface and sourcing from the location of the submarine plumes were reported by aerial photographs on July 3, 2012, 5 days after acoustic plumes were recorded. In addition, several geophysical and geochemical data support the fact that these submarine vents were preceded by several precursory signatures: (i) a sharp increase of the seismic energy release and the number of daily earthquakes of magnitude ≥2.5 on June 25, 2012, (ii) significant vertical and horizontal displacements observed at the Canary Islands GPS network (Nagoya University-ITER-GRAFCAN) with uplifts up to 3 cm from June 25 to 26, 2012, (iii) an anomalous increase of the soil gas radon activity, from the end of April until the beginning of June reaching peak values of 2.7 kBq/m3 on June 3, 2012, and (iv) observed positive peak in the air-corrected value of 3He/4He ratio monitored in ground waters (8.5 atmospheric 3He/4He ratio ( R A)) at the northwestern El Hierro on June 16, 2012. Combining these submarine and subaerial information, we suggest these plumes are the consequence of submarine vents exhaling volcanic gas mixed with fine ash as consequence of an event of rapid rise of volatile-rich magma beneath the NW submarine ridge

  11. Searching for structural medium changes during the 2011 El Hierro (Spain) submarine eruption

    NASA Astrophysics Data System (ADS)

    Sánchez-Pastor, Pilar S.; Schimmel, Martin; López, Carmen

    2017-04-01

    Submarine volcanic eruptions are often difficult to study due to their restricted access that usually inhibits direct observations. That happened with the 2011 El Hierro eruption, which is the first eruption that has been tracked in real time in Canary Islands. For instance, despite the real-time tracking it was not possible to determine the exact end of the eruption. Besides, volcanic eruptions involve many dynamic (physical and chemical) processes, which cause structural changes in the surrounding medium that we expect to observe and monitor through passive seismic approaches. The purpose of this study is to detect and analyse these changes as well as to search for precursory signals to the eruption itself using ambient noise auto and cross-correlations. We employ different correlation strategies (classical and phase cross-correlation) and apply them to field data recorded by the IGN network during 2011 and 2012. The different preprocessing and processing steps are tested and compared to better understand the data, to find the robust signatures, and to define a routine work procedure. One of the problems we face is the presence of volcanic tremors, which cause a varying seismic response that we can not attribute to structural changes. So far, structural changes could not be detected unambiguously and we present our ongoing research in this field.

  12. The natural ocean acidification and fertilization event caused by the submarine eruption of El Hierro

    NASA Astrophysics Data System (ADS)

    Magdalena Santana-Casiano, J.; González-Dávila, Melchor; Fraile-Nuez, Eugenio

    2014-05-01

    The shallow submarine eruption which took place in October 10th 2011, 1.8 km south of the island of El Hierro (Canary Islands) allowed the study of the abrupt changes in the physical-chemical properties of seawater caused by volcanic discharges. In order to monitor the evolution of these changes, seven oceanographic surveys were carried out over six months (November 2011-April 2012) from the beginning of the eruptive stage to the post-eruptive phase. Important changes in the water column chemistry including large decreases in pH, striking effects on the carbonate system, decreases in the oxygen concentrations and enrichment of Fe(II) and nutrients were produced. As a result of the ongoing magmatic activity, the submarine eruption produced an unprecedented episode of severe acidification and fertilization. The findings highlight that the same volcano which was responsible for the creation of a highly corrosive environment, affecting marine biota, has also provided the nutrients required for the rapid recuperation of the marine ecosystem.

  13. Volcanic signatures in time gravity variations during the volcanic unrest on El Hierro (Canary Islands)

    NASA Astrophysics Data System (ADS)

    Sainz-Maza Aparicio, Sergio; Arnoso Sampedro, José; González Montesinos, Fuensanta; Martí Molist, Joan

    2014-05-01

    Gravity changes occurring before the 2011-2012 El Hierro submarine eruption are interpreted in terms of the pre-eruptive signatures during the episode of unrest. Continuous gravity measurements were made at two sites on the island using the relative spring gravimeter LCR gPhone-054. On September 15, 2011, an observed gravity decrease of 45 µGal, associated with the southward migration of seismic epicenters, suggests that a lateral magma migration occurred beneath the volcanic edifice, an apparently clear precursor of the eruption that took place 25 days later on October 10, 2011. High-frequency gravity signals also appeared on October 6-11, 2011, suggesting that an interaction between a magmatic intrusion and the ocean floor was occurring. These important gravity changes, with amplitudes varying from 10 to -90 µGal, during the first three days following the onset of the eruption are consistent with the northward migration of the eruptive focus along an active eruptive fissure. An apparent correlation of gravity variations with body tide vertical strain was also noted, which suggests that concurrent tidal triggering occurred during the initial stage of the eruption.

  14. Monitoring El Hierro submarine volcanic eruption events with a submarine seismic array

    NASA Astrophysics Data System (ADS)

    Jurado, Maria Jose; Molino, Erik; Lopez, Carmen

    2013-04-01

    A submarine volcanic eruption took place near the southernmost emerged land of the El Hierro Island (Canary Islands, Spain), from October 2011 to February 2012. The Instituto Geografico Nacional (IGN) seismic stations network evidenced seismic unrest since July 2012 and was a reference also to follow the evolution of the seismic activity associated with the volcanic eruption. From the beginning of the eruption a geophone string was installed less than 2 km away from the new volcano, next to La Restinga village shore, to record seismic activity related to the volcanic activity, continuously and with special interest on high frequency events. The seismic array was endowed with 8, high frequency, 3 component, 250 Hz, geophone cable string with a separation of 6 m between them. The analysis of the dataset using spectral techniques allows the characterization of the different phases of the eruption and the study of its dynamics. The correlation of the data analysis results with the observed sea surface activity (ash and lava emission and degassing) and also with the seismic activity recorded by the IGN field seismic monitoring system, allows the identification of different stages suggesting the existence of different signal sources during the volcanic eruption and also the posteruptive record of the degassing activity. The study shows that the high frequency capability of the geophone array allow the study of important features that cannot be registered by the standard seismic stations. The accumulative spectral amplitude show features related to eruptive changes.

  15. The natural ocean acidification and fertilization event caused by the submarine eruption of El Hierro

    NASA Astrophysics Data System (ADS)

    Santana-Casiano, J.; Fraile-Nuez, E.; Gonzalez-Davila, M.

    2013-12-01

    The shallow submarine eruption which took place in October 10th 2011, 1.8 km south of the island of El Hierro (Canary Islands) allowed the study of the abrupt changes in the physical-chemical properties of seawater caused by volcanic discharges. In order to monitor the evolution of these changes, seven oceanographic surveys were carried out over six months (November 2011-April 2012) from the beginning of the eruptive stage to the post-eruptive phase. It was observed dramatic changes in the water column chemistry including large decreases in pH, striking effects on the carbonate system, decreases in the oxygen concentrations and enrichment of Fe(II) and nutrients. The findings highlight that the same volcano which was responsible for the creation of a highly corrosive environment, affecting marine biota, has also provided the nutrients required for the rapid recuperation of the marine ecosystem. In January 2013, a new project, the VULCANO project, was iniciated to study the post-eruptive phase in the submarine volcanic area.

  16. Volcanic signatures in time gravity variations during the volcanic unrest on El Hierro (Canary Islands)

    NASA Astrophysics Data System (ADS)

    Sainz-Maza Aparicio, S.; Arnoso Sampedro, J.; Gonzalez Montesinos, F.; Martí Molist, J.

    2014-06-01

    Gravity changes occurring during the initial stage of the 2011-2012 El Hierro submarine eruption are interpreted in terms of the preeruptive signatures during the episode of unrest. Continuous gravity measurements were made at two sites on the island using the relative spring gravimeter LaCoste and Romberg gPhone-054. On 15 September 2011, an observed gravity decrease of 45 μGal, associated with the southward migration of seismic epicenters, is consistent with a lateral magma migration that occurred beneath the volcanic edifice, an apparently clear precursor of the eruption that took place 25 days later on 10 October 2011. High-frequency gravity signals also appeared on 6-11 October 2011, pointing to an occurring interaction between a magmatic intrusion and the ocean floor. These important gravity changes, with amplitudes varying from 10 to -90 μGal, during the first 3 days following the onset of the eruption are consistent with the northward migration of the eruptive focus along an active eruptive fissure. An apparent correlation of gravity variations with body tide vertical strain was also noted, which could indicate that concurrent tidal triggering occurred during the initial stage of the eruption.

  17. Long-term volcanic hazard assessment on El Hierro (Canary Islands)

    NASA Astrophysics Data System (ADS)

    Becerril, L.; Bartolini, S.; Sobradelo, R.; Martí, J.; Morales, J. M.; Galindo, I.

    2014-07-01

    Long-term hazard assessment, one of the bastions of risk-mitigation programs, is required for land-use planning and for developing emergency plans. To ensure quality and representative results, long-term volcanic hazard assessment requires several sequential steps to be completed, which include the compilation of geological and volcanological information, the characterisation of past eruptions, spatial and temporal probabilistic studies, and the simulation of different eruptive scenarios. Despite being a densely populated active volcanic region that receives millions of visitors per year, no systematic hazard assessment has ever been conducted on the Canary Islands. In this paper we focus our attention on El Hierro, the youngest of the Canary Islands and the most recently affected by an eruption. We analyse the past eruptive activity to determine the spatial and temporal probability, and likely style of a future eruption on the island, i.e. the where, when and how. By studying the past eruptive behaviour of the island and assuming that future eruptive patterns will be similar, we aim to identify the most likely volcanic scenarios and corresponding hazards, which include lava flows, pyroclastic fallout and pyroclastic density currents (PDCs). Finally, we estimate their probability of occurrence. The end result, through the combination of the most probable scenarios (lava flows, pyroclastic density currents and ashfall), is the first qualitative integrated volcanic hazard map of the island.

  18. Long-term volcanic hazard assessment on El Hierro (Canary Islands)

    NASA Astrophysics Data System (ADS)

    Becerril, L.; Bartolini, S.; Sobradelo, R.; Martí, J.; Morales, J. M.; Galindo, I.

    2014-02-01

    Long-term hazard assessment, one of the bastions of risk-mitigation programs, is required for territorial planning and for developing emergency plans. To ensure qualitative and representative results, long-term volcanic hazard assessment requires several sequential steps to be completed, which include the compilation of geological and volcanological information, the characterization of past eruptions, spatial and temporal probabilistic studies, and the simulation of different eruptive scenarios. Despite being a densely populated active volcanic region that receives millions of visitors per year, no systematic hazard assessment has ever been conducted in the Canary Islands. In this paper we focus our attention on El Hierro, the youngest of the Canary Islands and the most recently affected by an eruption. We analyze the past eruptive activity (how), the spatial probability (where) and the temporal probability (when) of an eruption on the island. By studying the past eruptive behavior of the island and assuming that future eruptive patterns will be similar, we aim to identify the most likely volcanic scenarios and corresponding hazards, which include lava flows, pyroclastic fallout and pyroclastic density currents (PDCs). Finally, we estimate their probability of occurrence. The end result is the first total qualitative volcanic hazard map of the island.

  19. Seismic tomography model reveals mantle magma sources of recent volcanic activity at El Hierro Island (Canary Islands, Spain)

    NASA Astrophysics Data System (ADS)

    García-Yeguas, Araceli; Ibáñez, Jesús M.; Koulakov, Ivan; Jakovlev, Andrey; Romero-Ruiz, M. Carmen; Prudencio, Janire

    2014-12-01

    We present a 3-D model of P and S velocities beneath El Hierro Island, constructed using the traveltime data of more than 13 000 local earthquakes recorded by the Instituto Geográfico Nacional (IGN, Spain) in the period from 2011 July to 2012 September. The velocity models were performed using the LOTOS code for iterative passive source tomography. The results of inversion were thoroughly verified using different resolution and robustness tests. The results reveal that the majority of the onshore area of El Hierro is associated with a high-velocity anomaly observed down to 10-12-km depth. This anomaly is interpreted as the accumulation of solid igneous rocks erupted during the last 1 Myr and intrusive magmatic bodies. Below this high-velocity pattern, we observe a low-velocity anomaly, interpreted as a batch of magma coming from the mantle located beneath El Hierro. The boundary between the low- and high-velocity anomalies is marked by a prominent seismicity cluster, thought to represent anomalous stresses due to the interaction of the batch of magma with crust material. The areas of recent eruptions, Orchilla and La Restinga, are associated with low-velocity anomalies surrounding the main high-velocity block. These eruptions took place around the island where the crust is much weaker than the onshore area and where the melted material cannot penetrate. These results put constraints on the geological model that could explain the origin of the volcanism in oceanic islands, such as in the Canaries, which is not yet clearly understood.

  20. Morphology, cytochemical staining, and ultrastructural characteristics of the blood cells of the giant lizard of El Hierro (Gallotia simonyi).

    PubMed

    Martínez-Silvestre, A; Marco, I; Rodriguez-Dominguez, M A; Lavín, S; Cuenca, R

    2005-04-01

    The object of this study was to examine the erythrocytes, leukocytes and thrombocytes of the giant lizard of El Hierro (Gallotia simonyi) by light and electron (TEM) microscopy, and cytochemical staining. Smears were prepared from blood from the ventral coccygeal vein of 10 healthy adult lizards (five males and five females) from the Giant Lizard of El Hierro Reproduction and Research Centre, Canary Islands, Spain. The cytochemical stains used were: benzidine peroxidase (BP), chloroacetate esterase (CAE), alpha-naphthyl acetate esterase (ANAE), acid phosphatase (AP), periodic acid-Schiff (PAS), toluidine blue (TB) and May-Grünwald-Giemsa (MGG). Electron microscopy was also performed on all samples. Heterophils had granules that were heterogeneous in both size and electron density, and stained with BP, PAS and ANAE. Eosinophil granules were homogeneously electron-dense and stained for AP, CAE and ANAE. Basophils had both highly and moderately electron-dense granules, and stained with TB and ANAE. Azurophil granules were of low electron-density and stained for AP, CAE and ANAE. Azurophil cytoplasm was vacuolated on TEM. The cytoplasm of lymphocytes contained many ribosomes and was positive for AP. Monocytes had a large nucleus and a vacuolated cytoplasm but did not stain by any of the cytochemical methods used. Thrombocytes had a relatively large nucleus but little cytoplasm; they did not stain cytochemically. The blood cells of the giant lizards of El Hierro differ from those of other members of the Order Squamata both morphologically and cytochemically. The variation in cytochemical responses in the blood of reptiles makes it necessary to study species individually if meaningful clinical decisions are to be made.

  1. The 2011 El Hierro submarine eruption, Canary Islands: chemical and isotopic evidence in dissolved gases of seawater

    NASA Astrophysics Data System (ADS)

    Nolasco, D.; Padrón, E.; Melián, G.; Dionis, S.; Rodríguez, F.; Padilla, G.; Hernández, P. A.; Pérez, N. M.; Sumino, H.

    2012-04-01

    El Hierro is the smallest of the Canary Islands and is located in the southwest extreme of the archipelago. Since 16 July, an anomalous seismicity at El Hierro Island was recorded by IGN seismic network. After the occurrence of more than 10,000 seismic events, volcanic tremor started at 05:15 on October 10, 2011, followed by a green discolouration of seawater and strong degassing on October 12, 2011, indicating the occurrence of a submarine eruption at the south of El Hierro island. Further episodes of volcanic activity had occurred during November, December 2011 and January 2012, with turbulent water, foam rings, and volcanic material again reaching the sea surface. Colour of the discoloured area has changed frequently from light green to dark brown, depending on the eruptive activity. To provide additional information about the 2011 El Hierro submarine eruption, a chemical and isotopic study of the dissolved gases in the seawater affected by the eruptive event was conducted one week after the eruption started. Sea water samples were collected by the Ignacio Lozano Oceanographic Research Vessel (ICCM). Three vertical geochemical profiles of dissolved gases were carried out near the location of the submarine eruption. Depths of the sea water samples ranged from 10 to 400 meters. Dissolved CO2, He, N2, O2 and Ar as well as the isotopic composition of CO2, Ar and He were analyzed. Relatively high 3He/4He ratio were observed at most of the sea water samples reaching values up to 5.8 RA (RA the 3He/4He ratio on air) at 100 meters depth of the geochemical vertical profile closest to the eruption site, suggesting a significant volcanic-magmatic-hydrothermal discharge through the submarine eruption vent. Other dissolved gas geochemical parameters such as N2/36Ar, N2/O2 and CO2/O2 ratios clearly suggest a strong presence of a submarine volcanic plume around 100 meters depth associated to this submarine eruption. The He and CO2 isotopes systematics confirmed also clearly a

  2. Eighteen years of geochemical monitoring at the oceanic active volcanic island of El Hierro (Canary Islands, Spain)

    NASA Astrophysics Data System (ADS)

    Asensio-Ramos, María; Alonso, Mar; Sharp, Emerson; Woods, Hannah; Barrancos, José; Pérez, Nemesio M.

    2016-04-01

    We report herein the latest results of a diffuse CO2 efflux survey at El Hierro volcanic system carried out during the summer period of 2015 to constrain the total CO2 output from the studied area a during post-eruptive period. El Hierro Island (278 km2) is the youngest and the SW-most of the Canary Islands. On July 16, 2011, a seismic-volcanic crisis started with the occurrence of more than 11,900 seismic events and significant deformation along the island. On October 10, 2011, the dominant character of seismicity changed dramatically from discrete earthquakes to continuous tremor, a clear indication that magma was rapidly approaching the surface immediately before the onset of the eruption, October 12. Eruption was declared over on 5 March, 2012. In order to monitor the volcanic activity of El Hierro Island, from 1998 to 2015 diffuse CO2 emission studies have been performed at El Hierro volcanic system in a yearly basis (˜600 observation sites) according to the accumulation chamber method. Spatial distribution maps were constructed following the sequential Gaussian simulation (sGs) procedure. To quantify the total CO2 emission from the studied area, 100 simulations for each survey have been performed. During the eruption period, soil CO2 efflux values range from non-detectable (˜0.5 g m-2 d-1) up to 457 g m-2 d-1, reaching in November 27, 2011, the maximum CO2 output estimated value of all time series, 2,398 t d-1, just before the episodes of maximum degassing observed as vigorous bubbling at the sea surface and an increment in the amplitude of the tremor signal. During the 2015 survey, soil CO2 efflux values ranged from non-detectable up to 41 g m-2 d-1. The spatial distribution of diffuse CO2 emission values seemed to be controlled by the main volcano structural features of the island. The total diffuse CO2 output released to atmosphere was estimated at 575 ± 24 t d-1, value slightly higher that the background CO2 emission estimated at 422 t d-1 (Melián et

  3. Transient changes in bacterioplankton communities induced by the submarine volcanic eruption of El Hierro (Canary Islands).

    PubMed

    Ferrera, Isabel; Arístegui, Javier; González, José M; Montero, María F; Fraile-Nuez, Eugenio; Gasol, Josep M

    2015-01-01

    The submarine volcanic eruption occurring near El Hierro (Canary Islands) in October 2011 provided a unique opportunity to determine the effects of such events on the microbial populations of the surrounding waters. The birth of a new underwater volcano produced a large plume of vent material detectable from space that led to abrupt changes in the physical-chemical properties of the water column. We combined flow cytometry and 454-pyrosequencing of 16S rRNA gene amplicons (V1-V3 regions for Bacteria and V3-V5 for Archaea) to monitor the area around the volcano through the eruptive and post-eruptive phases (November 2011 to April 2012). Flow cytometric analyses revealed higher abundance and relative activity (expressed as a percentage of high-nucleic acid content cells) of heterotrophic prokaryotes during the eruptive process as compared to post-eruptive stages. Changes observed in populations detectable by flow cytometry were more evident at depths closer to the volcano (~70-200 m), coinciding also with oxygen depletion. Alpha-diversity analyses revealed that species richness (Chao1 index) decreased during the eruptive phase; however, no dramatic changes in community composition were observed. The most abundant taxa during the eruptive phase were similar to those in the post-eruptive stages and to those typically prevalent in oceanic bacterioplankton communities (i.e. the alphaproteobacterial SAR11 group, the Flavobacteriia class of the Bacteroidetes and certain groups of Gammaproteobacteria). Yet, although at low abundance, we also detected the presence of taxa not typically found in bacterioplankton communities such as the Epsilonproteobacteria and members of the candidate division ZB3, particularly during the eruptive stage. These groups are often associated with deep-sea hydrothermal vents or sulfur-rich springs. Both cytometric and sequence analyses showed that once the eruption ceased, evidences of the volcano-induced changes were no longer observed.

  4. Focal mechanism of the seismic series prior to the 2011 El Hierro eruption

    NASA Astrophysics Data System (ADS)

    del Fresno, C.; Buforn, E.; Cesca, S.; Domínguez Cerdeña, I.

    2015-12-01

    The onset of the submarine eruption of El Hierro (10-Oct-2011) was preceded by three months of low-magnitude seismicity (Mw<4.0) characterized by a well documented hypocenter migration from the center to the south of the island. Seismic sources of this series have been studied in order to understand the physical process of magma migration. Different methodologies were used to obtain focal mechanisms of largest shocks. Firstly, we have estimated the joint fault plane solutions for 727 shocks using first motion P polarities to infer the stress pattern of the sequence and to determine the time evolution of principle axes orientation. Results show almost vertical T-axes during the first two months of the series and horizontal P-axes on N-S direction coinciding with the migration. Secondly, a point source MT inversion was performed with data of the largest 21 earthquakes of the series (M>3.5). Amplitude spectra was fitted at local distances (<20km). Reliability and stability of the results were evaluated with synthetic data. Results show a change in the focal mechanism pattern within the first days of October, varying from complex sources of higher non-double-couple components before that date to a simpler strike-slip mechanism with horizontal tension axes on E-W direction the week prior to the eruption onset. A detailed study was carried out for the 8 October 2011 earthquake (Mw=4.0). Focal mechanism was retrieved using a MT inversion at regional and local distances. Results indicate an important component of strike-slip fault and null isotropic component. The stress pattern obtained corresponds to horizontal compression in a NNW-SSE direction, parallel to the southern ridge of the island, and a quasi-horizontal extension in an EW direction. Finally, a simple source time function of 0.3s has been estimated for this shock using the Empirical Green function methodology.

  5. Multi-event behavior of El Golfo landslide (El Hierro Island, Canary Archipelago)

    NASA Astrophysics Data System (ADS)

    León, Ricardo; Biain, Ander; Urgeles, Roger; Somoza, Luis; Ferrer, Mercedes; García-Crespo, Jesús; Francisco Mediato, José; Galindo, Inés; Yepes, Jorge; Gimenez-Moreno, Julia

    2017-04-01

    Based on the re-interpretation of a vast onshore-offshore data set, a new morpho-structural characterization of the El Golfo giant landslide in the island of El Hierro (Canary Archipelago, Spain) is presented. Offshore multibeam echosounder data, chirp sub-bottom profiles, multichannel seismic reflection data and onshore information from water wells and galleries have been analyzed to determine the nature of the event. The subaerial headscarp shows a non-continuous arcuate profile formed by two nested semi-circular amphitheaters that extend offshore along a smooth chute, suggesting the occurrence of at least two large retrogressive events. Channels/gullies and escarpments developed along the submarine sector of the scar also indicate smaller-scale events and predominance of sediment bypass. At the base of submerged island, two subunits within the related submarine mass transport deposit (MTD) are identified on multichannel seismic reflection profiles confirming the multi-event nature of the landslide. The MTD, identified as a debris avalanche, has a total estimated volume of 318 km3: 84 km3 and 234 km3, for the lower and upper subunits respectively. Data from wells and galleries show abrasion platforms with beach deposits at sea-level (0 masl) formed after the landslide scar and buried by the El Golfo post-collapse infill lavas, suggesting an age at least older than 23.5-82.5 ka for the landslide. This work has been supported by the projects IGCP-640 S4SLIDE, High resolution seabed mapping EASME/EMFF/2016/005 and CTM2010-09496-E. Keywords: Submarine landslides, volcanic islands, debris avalanche, Canary Islands

  6. Transient Changes in Bacterioplankton Communities Induced by the Submarine Volcanic Eruption of El Hierro (Canary Islands)

    PubMed Central

    Ferrera, Isabel; Arístegui, Javier; González, José M.; Montero, María F.; Fraile-Nuez, Eugenio; Gasol, Josep M.

    2015-01-01

    The submarine volcanic eruption occurring near El Hierro (Canary Islands) in October 2011 provided a unique opportunity to determine the effects of such events on the microbial populations of the surrounding waters. The birth of a new underwater volcano produced a large plume of vent material detectable from space that led to abrupt changes in the physical-chemical properties of the water column. We combined flow cytometry and 454-pyrosequencing of 16S rRNA gene amplicons (V1–V3 regions for Bacteria and V3–V5 for Archaea) to monitor the area around the volcano through the eruptive and post-eruptive phases (November 2011 to April 2012). Flow cytometric analyses revealed higher abundance and relative activity (expressed as a percentage of high-nucleic acid content cells) of heterotrophic prokaryotes during the eruptive process as compared to post-eruptive stages. Changes observed in populations detectable by flow cytometry were more evident at depths closer to the volcano (~70–200 m), coinciding also with oxygen depletion. Alpha-diversity analyses revealed that species richness (Chao1 index) decreased during the eruptive phase; however, no dramatic changes in community composition were observed. The most abundant taxa during the eruptive phase were similar to those in the post-eruptive stages and to those typically prevalent in oceanic bacterioplankton communities (i.e. the alphaproteobacterial SAR11 group, the Flavobacteriia class of the Bacteroidetes and certain groups of Gammaproteobacteria). Yet, although at low abundance, we also detected the presence of taxa not typically found in bacterioplankton communities such as the Epsilonproteobacteria and members of the candidate division ZB3, particularly during the eruptive stage. These groups are often associated with deep-sea hydrothermal vents or sulfur-rich springs. Both cytometric and sequence analyses showed that once the eruption ceased, evidences of the volcano-induced changes were no longer observed

  7. Magma displacements under insular volcanic fields, applications to eruption forecasting: El Hierro, Canary Islands, 2011-2013

    NASA Astrophysics Data System (ADS)

    García, A.; Fernández-Ros, A.; Berrocoso, M.; Marrero, J. M.; Prates, G.; De la Cruz-Reyna, S.; Ortiz, R.

    2014-04-01

    Significant deformations, followed by increased seismicity detected since 2011 July at El Hierro, Canary Islands, Spain, prompted the deployment of additional monitoring equipment. The climax of this unrest was a submarine eruption first detected on 2011 October 10, and located at about 2 km SW of La Restinga, southernmost village of El Hierro Island. The eruption ceased on 2012 March 5, after the volcanic tremor signals persistently weakened through 2012 February. However, the seismic activity did not end with the eruption, as several other seismic crises followed. The seismic episodes presented a characteristic pattern: over a few days the number and magnitude of seismic event increased persistently, culminating in seismic events severe enough to be felt all over the island. Those crises occurred in 2011 November, 2012 June and September, 2012 December to 2013 January and in 2013 March-April. In all cases the seismic unrest was preceded by significant deformations measured on the island's surface that continued during the whole episode. Analysis of the available GPS and seismic data suggests that several magma displacement processes occurred at depth from the beginning of the unrest. The first main magma movement or `injection' culminated with the 2011 October submarine eruption. A model combining the geometry of the magma injection process and the variations in seismic energy release has allowed successful forecasting of the new-vent opening.

  8. Monitoring the volcanic unrest of El Hierro (Canary Islands) before the onset of the 2011-2012 submarine eruption

    NASA Astrophysics Data System (ADS)

    López, C.; Blanco, M. J.; Abella, R.; Brenes, B.; Cabrera Rodríguez, V. M.; Casas, B.; Domínguez Cerdeña, I.; Felpeto, A.; de Villalta, M. Fernández; del Fresno, C.; García, O.; García-Arias, M. J.; García-Cañada, L.; Gomis Moreno, A.; González-Alonso, E.; Guzmán Pérez, J.; Iribarren, I.; López-Díaz, R.; Luengo-Oroz, N.; Meletlidis, S.; Moreno, M.; Moure, D.; de Pablo, J. Pereda; Rodero, C.; Romero, E.; Sainz-Maza, S.; Sentre Domingo, M. A.; Torres, P. A.; Trigo, P.; Villasante-Marcos, V.

    2012-07-01

    On 10 October 2011, a submarine volcanic eruption started 2 km south from El Hierro Island (Spain). Since July 2011 a dense multiparametric monitoring network was deployed all over the island by Instituto Geográfico Nacional (IGN). By the time the eruption started, almost 10000 earthquakes had been located and the deformation analyses showed a maximum deformation of more than 5 cm. Earthquake migration from the north to the south of the island and acceleration of seismicity are in good correlation with changes in the deformation pattern as well as with some anomalies in geochemical and geomagnetic parameters. An earthquake of local magnitude 4.3 at 12 km depth (8 October 2011) and shallower seismicity a day after, preceded the onset of the eruption. This is the first time that a volcanic eruption is fully monitored in the Canary Islands. Data recorded during this unrest episode at El Hierro will contribute to understand reawakening of volcanic activity in this region and others of similar characteristics.

  9. The submarine volcano eruption at the island of El Hierro: physical-chemical perturbation and biological response

    NASA Astrophysics Data System (ADS)

    Fraile-Nuez, E.; Santana-Casiano, J.; Gonzalez-Davila, M.

    2013-12-01

    On October 10 2011 an underwater eruption gave rise to a novel shallow submarine volcano south of the island of El Hierro, Canary Islands, Spain. During the eruption large quantities of mantle-derived gases, solutes and heat were released into the surrounding waters. In order to monitor the impact of the eruption on the marine ecosystem, periodic multidisciplinary cruises were carried out. Here, we present an initial report of the extreme physical-chemical perturbations caused by this event, comprising thermal changes, water acidification, deoxygenation and metal-enrichment, which resulted in significant alterations to the activity and composition of local plankton communities. Our findings highlight the potential role of this eruptive process as a natural ecosystem-scale experiment for the study of extreme effects of global change stressors on marine environments. (A) Natural color composite from the MEdium Resolution Imaging Spectrometer (MERIS) instrument aboard ENVISAT Satellite (European Space Agency), (November 9, 2011 at 14:45 UTC). Remote sensing data have been used to monitor the evolution of the volcanic emissions, playing a fundamental role during field cruises in guiding the Spanish government oceanographic vessel to the appropriate sampling areas. The inset map shows the position of Canary Islands west of Africa and the study area (solid white box). (B) Location of the stations carried out from November 2011 to February 2012 at El Hierro. Black lines denote transects A-B and C-D.

  10. TUBERCULOSIS COMO ENFERMEDAD OCUPACIONAL

    PubMed Central

    Mendoza-Ticona, Alberto

    2014-01-01

    Existe evidencia suficiente para declarar a la tuberculosis como enfermedad ocupacional en diversos profesionales especialmente entre los trabajadores de salud. En el Perú están normados y reglamentados los derechos laborales inherentes a la tuberculosis como enfermedad ocupacional, como la cobertura por discapacidad temporal o permanente. Sin embargo, estos derechos aún no han sido suficientemente socializados. En este trabajo se presenta información sobre el riesgo de adquirir tuberculosis en el lugar de trabajo, se revisan las evidencias para declarar a la tuberculosis como enfermedad ocupacional en trabajadores de salud y se presenta la legislación peruana vigente al respecto. PMID:22858771

  11. Diffuse CO_{2} degassing monitoring of the oceanic active volcanic island of El Hierro, Canary Islands, Spain

    NASA Astrophysics Data System (ADS)

    Hernández, Pedro A.; Norrie, Janice; Withoos, Yannick; García-Merino, Marta; Melián, Gladys; Padrón, Eleazar; Barrancos, José; Padilla, Germán; Rodríguez, Fátima; Pérez, Nemesio M.

    2017-04-01

    Even during repose periods, volcanoes release large amounts of gases from both visible (fumaroles, solfataras, plumes) and non-visible emanations (diffuse degassing). In the last 20 years, there has been considerable interest in the study of diffuse degassing as a powerful tool in volcano monitoring programs, particularly in those volcanic areas where there are no visible volcanic-hydrothermal gas emissions. Historically, soil gas and diffuse degassing surveys in volcanic environments have focused mainly on CO2 because it is, after water vapor, the most abundant gas dissolved in magma. As CO2 travels upward by advective-diffusive transport mechanisms and manifests itself at the surface, changes in its flux pattern over time provide important information for monitoring volcanic and seismic activity. Since 1998, diffuse CO2 emission has been monitored at El Hierro Island, the smallest and south westernmost island of the Canarian archipelago with an area of 278 km2. As no visible emanations occur at the surface environment of El Hierro, diffuse degassing studies have become the most useful geochemical tool to monitor the volcanic activity in this volcanic island. The island experienced a volcano-seismic unrest that began in July 2011, characterized by the location of a large number of relatively small earthquakes (M<2.5) beneath El Hierro at depths between 8 and 15 km. On October 12, 2011, a submarine eruption was confirmed during the afternoon of October 12, 2011 by visual observations off the coast of El Hierro, about 2 km south of the small village of La Restinga in the southernmost part of the island. During the pre-eruptive and eruptive periods, the time series of the diffuse CO2 emission released by the whole island experienced two significant increases. The first started almost 2 weeks before the onset of the submarine eruption, reflecting a clear geochemical anomaly in CO2 emission, most likely due to increasing release of deep seated magmatic gases to the

  12. Diffuse degassing He/CO2 ratio before and during the 2011-12 El Hierro submarine eruption, Canary Islands

    NASA Astrophysics Data System (ADS)

    Padrón, Eleazar; Hernández, Pedro A.; Melián, Gladys V.; Barrancos, José; Padilla, Germán; Pérez, Nemesio M.; Dionis, Samara; Rodríguez, Fátima; Asensio-Ramos, María; Calvo, David

    2015-04-01

    El Hierro Island (278 km2) is the youngest and the SW-most of the Canary Islands. On July 16, 2011, a seismic-volcanic crisis started with the occurrence of more than 11,900 seismic events and significant deformation along the island, culminating with the eruption onset in October 12. Since at El Hierro Islands there are not any surface geothermal manifestation (fumaroles, etc), we have focused our studies on soil degassing surveys. Between July 2011 to March 2012, seventeen diffuse CO2 and He emissions soil gas surveys were undertaken at El Hierro volcanic system (600 observation sites) with the aim to investigate the relationship between their temporal variations and the volcanic activity (Padrón et al., 2013; Melián et al., 2014). Based on the diffuse He/CO2 emission ratio, a sharp increase before the eruption onset was observed, reaching the maximum value on September 26 (6.8×10-5), sixteen days before the occurrence of the eruption. This increase coincided with an increase in seismic energy release during the volcanic unrest and occurred together with an increase on the 3He/4He isotopic ratio in groundwaters from a well in El Hierro Island (Padrón et al., 2013; from 2-3 RA to 7.2 RA where RA = 3He/4He ratio in air), one month prior to the eruption onset. Early degassing of new gas-rich magma batch at depth could explain the observed increase on the He/CO2 ratio, causing a preferential partitioning of CO2 in the gas phase with respect to the He, due to the lower solubility of CO2 than that of He in basaltic magmas. During the eruptive period (October 2011-March 2012) the prevalence of a magmatic CO2-dominated component is evident, as indicated by the generally lower He/CO2 ratios and high 3He/4He values (Padrón et al., 2013). The onset of the submarine eruption might have produced a sudden release of volcanic gases, and consequently, a decrease in the volcanic gas pressure of the magma bodies moving beneath the island, reflected by a drastic decrease in

  13. Spatial and temporal variations of soil CO2 degassing rate at El Hierro volcanic system and relation to the 2011 submarine eruption

    NASA Astrophysics Data System (ADS)

    Melían, G.; Barrancos, J.; Padilla, G.; Dionis, S.; Rodríguez, F.; Nolasco, D.; Padrón, E.; Hernández, P. A.; Calvo, D.; Hernández, I.; Peréz, N. M.; Peraza, M. D.

    2012-04-01

    El Hierro Island (278 km2) is the youngest and the SW-most of the Canary Islands. On July 16, 2011, a seismic-volcanic crisis started with the occurrence of more than 11,900 seismic events. On October 10, 2011, the seismic activity changed behaviour and produced a harmonic tremor due to magma movement suggesting the initial stage of an eruption. The purpose of this study is to investigate the spatial and temporal variations of soil CO2 degassing rates at El Hierro volcanic system and its relation with the 2011 El Hierro volcanic unrest. Since 1998, diffuse CO2 emission has been investigated at El Hierro volcanic system in a yearly basis during the summer periods with approximately 600 observation sites. From 2004 to 2009, a diffuse CO2 emission rate decreasing trend from 1434 to 358 t•d-1 (equivalent to background values) was observed, and this tendency changed from 2009 to 2010 reaching a diffuse CO2 emission rate of 970 t•d-1. Because of this observed tendency change on the diffuse CO2 emission rate is possible to think that the preliminary stages of the 2011 volcanic unrest at El Hierro did start by the middle of 2010 with aseismic magma rising in the upper mantle beneath El Hierro. Since July 2011 and due to the start of the seismic-volcanic crisis at El Hierro, 16 diffuse CO2 emission surveys have been undertaken until January 2012. Diffuse CO2 emission measurements were performed by means of portable NDIR sensors according to the accumulation chamber method. Observed soil CO2 efflux values for all the 2011-12 surveys have ranged from negligible values to 398 g•m-2•d-1. The diffuse CO2 output released to atmosphere for the 2011-12 surveys was estimated between 138 and 2,143 t•d-1. On October 6, 2011, an increase tendency of diffuse CO2 emission rate from 380 to 990 t•d-1 was observed prior the occurrence of the first 4 magnitude type earthquake on October 8, 2011, and El Hierro submarine eruption on October 12, 2011. From October 15, 2011, an

  14. Formation of U-depleted rhyolite from a basanite at El Hierro, Canary Islands

    NASA Astrophysics Data System (ADS)

    Sigmarsson, Olgeir; Laporte, Didier; Carpentier, Marion; Devouard, Bertrand; Devidal, Jean-Luc; Marti, Joan

    2013-03-01

    Phonolite and trachyte are the felsic magmas of the alkaline magma suites, which characterize the Canary Islands. The October 2011 submarine eruption off El Hierro, the westernmost island, nevertheless, produced a small volume of rhyolitic magma. The rhyolite occurred as highly vesicular, white coloured pumices enveloped in and mingled with darker coloured basanitic pumice. The basanitic pumice is relatively crystal poor with a few euhedral olivines (mostly Fo77-79), clinopyroxenes and Fe-rich spinels, whereas very rare olivine of same composition is found together with equally rare Fe-sulphide and FeTi-rich oxides in the rhyolite. The Fe-Mg exchange equilibrium in the oxides permits to calculate an equilibrium temperature of 970-890 °C for the rhyolite, in agreement with quartz-melt equilibrium at ca. 930 °C. A striking mineralogical feature of the rhyolite is the presence of rounded to contorted grains of milky quartz, which are xenocrysts incorporated and partly dissolved into the magma. Analyses of residual volatile concentrations in the glasses show that the rhyolite melt was highly degassed, whereas the basanitic glass still has important halogen concentrations. Trace element patterns of the mafic glasses and their elevated incompatible element concentrations are typical of the western Canary Island basanites. In contrast, the trace element composition of the rhyolite shows surprisingly low concentrations for all elements except the most incompatible ones (e.g. Rb, Ba, K and Th). All other measured LILE, HFSE and REE have significantly lower concentration than the basanitic counterpart that can be explained by fractionation of accessory phases (1 % apatite, 1 % sphene and 0.1 % zircon). Surprisingly, low U concentration is presumably related to elevated oxygen fugacity in the rhyolite, causing U to be in a hexavalent state, and fluxing of F-rich gas leading to volatilization of UF6, known to emanate at low temperature. The results suggest that a gas

  15. Time-dependent deformation at elevated temperatures in basalt from El Hierro, Stromboli and Teide volcanoes

    NASA Astrophysics Data System (ADS)

    Benson, P. M.; Fahrner, D.; Harnett, C. E.; Fazio, M.

    2014-12-01

    Time dependent deformation describes the process whereby brittle materials deform at a stress level below their short-term material strength (Ss), but over an extended time frame. Although generally well understood in engineering (where it is known as static fatigue or "creep"), knowledge of how rocks creep and fail has wide ramifications in areas as diverse as mine tunnel supports and the long term stability of critically loaded rock slopes. A particular hazard relates to the instability of volcano flanks. A large number of flank collapses are known such as Stromboli (Aeolian islands), Teide, and El Hierro (Canary Islands). Collapses on volcanic islands are especially complex as they necessarily involve the combination of active tectonics, heat, and fluids. Not only does the volcanic system generate stresses that reach close to the failure strength of the rocks involved, but when combined with active pore fluid the process of stress corrosion allows the rock mass to deform and creep at stresses far lower than Ss. Despite the obvious geological hazard that edifice failure poses, the phenomenon of creep in volcanic rocks at elevated temperatures has yet to be thoroughly investigated in a well controlled laboratory setting. We present new data using rocks taken from Stromboli, El Heirro and Teide volcanoes in order to better understand the interplay between the fundamental rock mechanics of these basalts and the effects of elevated temperature fluids (activating stress corrosion mechanisms). Experiments were conducted over short (30-60 minute) and long (8-10 hour) time scales. For this, we use the method of Heap et al., (2011) to impose a constant stress (creep) domain deformation monitored via non-contact axial displacement transducers. This is achieved via a conventional triaxial cell to impose shallow conditions of pressure (<25 MPa) and temperature (<200 °C), and equipped with a 3D laboratory seismicity array (known as acoustic emission, AE) to monitor the micro

  16. Improvements on the seismic catalog previous to the 2011 El Hierro eruption.

    NASA Astrophysics Data System (ADS)

    Domínguez Cerdeña, Itahiza; del Fresno, Carmen

    2017-04-01

    Precursors from the submarine eruption of El Hierro (Canary Islands) in 2011 included 10,000 low magnitude earthquakes and 5 cm crustal deformation within 81 days previous to the eruption onset on the 10th October. Seismicity revealed a 20 km horizontal migration from the North to the South of the island and depths ranging from 10 and 17 km with deeper events occurring further South. The earthquakes of the seismic catalog were manually picked by the IGN almost in real time, but there has not been a subsequent revision to check for new non located events jet and the completeness magnitude for the seismic catalog have strong changes during the entire swarm due to the variable number of events per day. In this work we used different techniques to improve the quality of the seismic catalog. First we applied different automatic algorithms to detect new events including the LTA-STA method. Then, we performed a semiautomatic system to correlate the new P and S detections with known phases from the original catalog. The new detected earthquakes were also located using Hypoellipse algorithm. The resulting new catalog included 15,000 new events mainly concentrated in the last weeks of the swarm and we assure a completeness magnitude of 1.2 during the whole series. As the seismicity from the original catalog was already relocated using hypoDD algorithm, we improved the location of the new events using a master-cluster relocation. This method consists in relocating earthquakes towards a cluster of well located events instead of a single event as the master-event method. In our case this cluster correspond to the relocated earthquakes from the original catalog. Finally, we obtained a new equation for the local magnitude estimation which allow us to include corrections for each seismic station in order to avoid local effects. The resulting magnitude catalog has a better fit with the moment magnitude catalog obtained for the strong earthquakes of this series in previous studies

  17. On the relation between crustal deformation and seismicity during the 2012-2014 magmatic intrusions in El Hierro island.

    NASA Astrophysics Data System (ADS)

    Domínguez Cerdeña, Itahiza; García-Cañada, Laura; Ángeles Benito Saz, María; Del Fresno, Carmen

    2017-04-01

    The last volcanic eruption in the Canary Islands took place in 2011 less than 2 km offshore El Hierro island, after 3 months of measuring surface deformation (up to 5 cm) and locating more than 10 000 earthquakes. In the two years following the end of the submarine eruption on 5 March 2012, six deep magmatic intrusions were recorded beneath the island. Despite the short time duration of these intrusions, these events have been more energetic that the 2011 pre-eruptive intrusive event but none of them ended in a new eruption. These post-eruptive reactivations are some of the few examples in the world of well monitored magmatic intrusions related with monogenetic volcanism. In order to understand these processes we have analyzed the geodetic and seismic data with different techniques. First, we did a joint hypocentral relocation of the six seismic swarms, including more than 6 300 events, to analyze the relative distribution of the earthquakes from different intrusions. The uncertainties of the earthquakes relocations was reduced to an average value of 300 m. New earthquakes' distribution shows the alignments of the different intrusions and a temporal migration of the events to larger depths. Moreover, we show the results of the ground deformation using GPS data from the network installed on the island (for each of the six intrusive events) and their inversion considering spherical models. In most of the intrusions the optimal source model was shallower and southern than the corresponding seismicity hypocenters. The intruded magma volume ranges from 0.02 to 0.13 km3. Finally, we also computed the b value from the Gutenberg Richter equation by means of a bootstrap method. The spatial and temporal evolution of the b value for the seismicity show a clear correlation with the temporal evolution of the crustal deformation. The six magma intrusions can be grouped, depending on their location, in three pairs each one associated with each of the three active rifts of El

  18. Enhancement of sub-daily positioning solutions for surface deformation surveillance at El Hierro volcano (Canary Islands, Spain)

    NASA Astrophysics Data System (ADS)

    Prates, G.; García, A.; Fernández-Ros, A.; Marrero, J. M.; Ortiz, R.; Berrocoso, M.

    2013-06-01

    El Hierro Island in the Canary Archipelago recently experienced a submerged eruption a few kilometers off its southern shore, detected 2011 October 10 on the island's south-rift alignment. The seismic activity suddenly increased around mid 2011 July, and ground deformation was then detected on the only geodetic benchmark that is continuously observed by global navigation satellite systems techniques and provides public data access. Based on that information, several other global navigation satellite system signal receivers were deployed on the island to provide continuous observation. For data collected by these receivers, a processing strategy was applied to achieve millimeter-level half-hourly positioning solutions. Position updates every 24 h are satisfactory to determine tectonic-plates' velocities. Updates near 1 s or less are required to characterize seismic waves. In between, minute-level updates are well suited for monitoring active volcano's inflation or deflation, providing an optimal time resolution of the local ground deformation. In half-hourly positioning solutions, the heterogeneous satellites' distribution in their orbital planes gives different constraints during satellite-constellation revolution, which can bias the solutions. Also, several geophysical influences can bias the solutions, including those related to gravitational movements. These influences have mostly semi-diurnal periodicities and may be considered Gaussian colored noise on the position's time series. Daily solutions that average out these influences can be applied in active volcanoes, but they can impose some limitations because they average the daily deformation, and the update waiting time is not suitable when near real-time surveillance is mandatory. These semi-diurnal biases do need to be removed or minimized to achieve millimeter-level sub-daily positioning solutions, however, and to do so, a discrete Kalman filter was applied to enhance the half-hourly positioning solutions

  19. The submarine volcano eruption at the island of El Hierro: physical-chemical perturbation and biological response

    PubMed Central

    Fraile-Nuez, E.; González-Dávila, M.; Santana-Casiano, J. M.; Arístegui, J.; Alonso-González, I. J.; Hernández-León, S.; Blanco, M. J.; Rodríguez-Santana, A.; Hernández-Guerra, A.; Gelado-Caballero, M. D.; Eugenio, F.; Marcello, J.; de Armas, D.; Domínguez-Yanes, J. F.; Montero, M. F.; Laetsch, D. R.; Vélez-Belchí, P.; Ramos, A.; Ariza, A. V.; Comas-Rodríguez, I.; Benítez-Barrios, V. M.

    2012-01-01

    On October 10 2011 an underwater eruption gave rise to a novel shallow submarine volcano south of the island of El Hierro, Canary Islands, Spain. During the eruption large quantities of mantle-derived gases, solutes and heat were released into the surrounding waters. In order to monitor the impact of the eruption on the marine ecosystem, periodic multidisciplinary cruises were carried out. Here, we present an initial report of the extreme physical-chemical perturbations caused by this event, comprising thermal changes, water acidification, deoxygenation and metal-enrichment, which resulted in significant alterations to the activity and composition of local plankton communities. Our findings highlight the potential role of this eruptive process as a natural ecosystem-scale experiment for the study of extreme effects of global change stressors on marine environments. PMID:22768379

  20. The submarine volcano eruption at the island of El Hierro: physical-chemical perturbation and biological response

    NASA Astrophysics Data System (ADS)

    Fraile-Nuez, Eugenio; Magdalena Santana-Casiano, J.; González-Dávila, Melchor

    2014-05-01

    On October 10 2011 an underwater eruption gave rise to a novel shallow submarine volcano south of the island of El Hierro, Canary Islands, Spain. During the eruption large quantities of mantle-derived gases, solutes and heat were released into the surrounding waters. In order to monitor the impact of the eruption on the marine ecosystem, periodic multidisciplinary cruises were carried out. Here, we present an initial report of the extreme physical-chemical perturbations caused by this event, comprising thermal changes, water acidification, deoxygenation and metal-enrichment, which resulted in significant alterations to the activity and composition of local plankton communities. Our findings highlight the potential role of this eruptive process as a natural ecosystem-scale experiment for the study of extreme effects of global change stressors on marine environments.

  1. The submarine volcano eruption at the island of El Hierro: physical-chemical perturbation and biological response.

    PubMed

    Fraile-Nuez, E; González-Dávila, M; Santana-Casiano, J M; Arístegui, J; Alonso-González, I J; Hernández-León, S; Blanco, M J; Rodríguez-Santana, A; Hernández-Guerra, A; Gelado-Caballero, M D; Eugenio, F; Marcello, J; de Armas, D; Domínguez-Yanes, J F; Montero, M F; Laetsch, D R; Vélez-Belchí, P; Ramos, A; Ariza, A V; Comas-Rodríguez, I; Benítez-Barrios, V M

    2012-01-01

    On October 10 2011 an underwater eruption gave rise to a novel shallow submarine volcano south of the island of El Hierro, Canary Islands, Spain. During the eruption large quantities of mantle-derived gases, solutes and heat were released into the surrounding waters. In order to monitor the impact of the eruption on the marine ecosystem, periodic multidisciplinary cruises were carried out. Here, we present an initial report of the extreme physical-chemical perturbations caused by this event, comprising thermal changes, water acidification, deoxygenation and metal-enrichment, which resulted in significant alterations to the activity and composition of local plankton communities. Our findings highlight the potential role of this eruptive process as a natural ecosystem-scale experiment for the study of extreme effects of global change stressors on marine environments.

  2. The magmatic plumbing system beneath El Hierro (Canary Islands): constraints from phenocrysts and naturally quenched basaltic glasses in submarine rocks

    NASA Astrophysics Data System (ADS)

    Stroncik, Nicole A.; Klügel, Andreas; Hansteen, Thor H.

    2009-05-01

    A thermobarometric and petrologic study of basanites erupted from young volcanic cones along the submarine portions of the three El Hierro rift zones (NE-Rift, NW-Rift and S-Ridge) has been performed to reconstruct magma plumbing and storage beneath the island. Mineral-melt thermobarometry applied to naturally quenched glass and clinopyroxene rims yields pressures ranging from 350 to 1070 MPa with about 80% of the calculated pressures being in the range of 600-800 MPa. This corresponds to a depth range of 19-26 km, implying that the main level of final crystal fractionation is within the uppermost mantle. No systematic dependence between sample locality and fractionation pressures could be observed. Olivine and clinopyroxene crystals in the rocks are complexly zoned and have, on an inter-sample as well as on an intra-sample scale, highly variable core and rim compositions. This can best be explained by mixing of multiply saturated (olivine, magnetite, clinopyroxene, ilmenite), moderately evolved magmas with more mafic magmas being either only saturated with olivine + spinel or with olivine + spinel + clinopyroxene. The inter-sample differences indicate derivation from small, isolated magma chambers which have undergone distinct fractionation and mixing histories. This is in contrast to oceanic intraplate volcanoes situated on plumes with high melt supply rates, e.g. Kilauea Volcano (Hawaii), where magma is mainly transported through a central conduit system and stored in a shallow magma chamber prior to injection into the rift zones. The plumbing system beneath El Hierro rather resembles the magma storage systems beneath, e.g. Madeira or La Palma, indicating that small, intermittent magma chambers might be a common feature of oceanic islands fed by plumes with relatively low fluxes, which results in only limited and periodic magma supply.

  3. Spatio-temporal occurrence of eruptions in El Hierro (Canary Islands). Sequential steps for long-term volcanic hazard assessment.

    NASA Astrophysics Data System (ADS)

    Becerril, Laura; Bartolini, Stefania; Sobradelo, Rosa; Martí, Joan; María Morales, José; Galindo, Inés; Geyer, Adelina

    2014-05-01

    Long term volcanic hazard assessment requires the attainment of several sequential steps, including the compilation of geological and volcanological information, the characterization of past eruptions, spatial and temporal probabilistic studies, and the simulation of different eruptive scenarios to get qualitative and representative results. Volcanic hazard assessment has not been yet systematically conducted in the Canary Islands, in spite of being a densely populated active volcanic region that receives millions of visitors per year. In this paper we focus our attention on El Hierro, the youngest and latest island affected by an eruption in the Canary Islands. We analyze the past eruptive activity (how), the spatial probability (where), and the temporal probability (when) on the island. Looking at the past eruptive behavior of the island, and assuming future eruptive patterns will be similar, we try to identify the most likely set of volcanic scenarios and corresponding hazards that could occur in the future (eg. lava flows, pyroclastic fallout, and pyroclastic density currents) and estimate their probability of occurrence. The final result shows the first volcanic hazard map of the island. This study represents a step forward in the evaluation of long term volcanic hazard at El Hierro Island with regard to previous studies. The obtained results should represent the main pillars on which to build risk mitigation programs as it is required for territorial planning and to develop emergency plans. This research was partially funded by IGME, CSIC and the European Commission (FT7 Theme: ENV.2011.1.3.3-1; Grant 282759: "VUELCO"), and MINECO grant GL2011-16144-E.

  4. Mantle to surface degassing of carbon- and sulphur-rich alkaline magma at El Hierro, Canary Islands

    NASA Astrophysics Data System (ADS)

    Longpré, Marc-Antoine; Stix, John; Klügel, Andreas; Shimizu, Nobumichi

    2017-02-01

    Basaltic volcanoes transfer volatiles from the mantle to the surface of the Earth. The quantification of deep volatile fluxes relies heavily on estimates of the volatile content of primitive magmas, the best archive of which is provided by melt inclusions. Available data from volcanoes producing mafic alkaline lavas in a range of tectonic settings suggest high volatile fluxes, but information remains sparse, particularly for intraplate ocean islands. Here we present measurements of volatile and trace element concentrations, as well as sulphur speciation, in olivine-hosted melt inclusions and matrix glasses from quenched basanite lava balloon samples from the 2011-2012 submarine eruption at El Hierro, Canary Islands. The results reveal remarkably high concentrations of dissolved volatiles and incompatible trace elements in this magma, with ∼80 ppm Nb and up to 3420 ppm CO2, 3.0 wt.% H2O and 5080 ppm S. Reconstructed primitive CO2 contents, considering CO2/Nb systematics and possible CO2 sequestration in shrinkage bubbles, reach weight percent levels, indicating that carbon is a major constituent of Canary Island magmas at depth and that exsolution of a CO2-rich fluid begins in the mantle at pressures in excess of 1 GPa. Correlations between sulphur concentration, sulphur speciation and water content suggest strong reduction of an initially oxidised mantle magma, likely controlled by coupled H2O and S degassing. This late-stage redox change may have triggered sulphide saturation, recorded by globular sulphide inclusions in clinopyroxene and ulvöspinel. The El Hierro basanite thus had a particularly high volatile-carrying capacity and released a minimum of 1.3-2.1 Tg CO2 and 1.8-2.9 Tg S to the environment, causing substantial stress on the local submarine ecosystem. These results highlight the important contribution of alkaline ocean island volcanoes, such as the Canary Islands, to volatile fluxes from the mantle.

  5. Geochemical monitoring network at El Hierro (Canary Islands) before and during 2011 submarine eruption

    NASA Astrophysics Data System (ADS)

    Torres, P. A.; Meletlidis, S.; Luengo-Oroz, N.; Moure, D.; Rodero, C.; Villasante-Marcos, V.; Abella, R.; López, C.; Blanco, M. J.

    2012-04-01

    Since 17 July 2011 an important increase in the number of seismic events located in El Hierro (Canary Islands, Spain) was detected by the seismic network of the Instituto Geográfico Nacional (I.G.N.). This increment was interpreted as a precursory signal of a potential eruption, which in fact took place three months later (10th October 2011). In order to improve and complete the volcano monitoring network several geochemical parameters were measured since the beginning of the anomalous seismic activity. Measurements of CO2 diffuse flux through the soil were carried out in the major part of the island: the central zone, El Golfo (northern area) and the zone delimitated by the western rift. More than 450 measurements were accomplished during July, August, and September 2011. Analysis of the data revealed the existence of a spatial anomaly with relative high CO2 diffuse flux in the southwest part of the El Golfo area, close to the zone where the anomalous seismicity was located. This abnormal flux, almost aligned with the western limit of the seismic swarm, was not detected again in measurements accomplished on September in the same area. Between July and August, four geochemical stations were installed in three sub-horizontal galleries and in one well. Air and soil temperature were measured in all galleries and air 222Rn concentration was determined in the four stations. Two of the galleries were also equipped with a sensor in order to obtain measurements of CO2 concentration in the air. The sampling period for each parameter was established in ten minutes. Anomalous high 222Rn concentrations were detected in the station located in the well, apparently related to increases in the seismic accumulated energy and the GPS deformation rates. Taking into account the location of the earthquake epicentres and in order to study the evolution over the time of some physicochemical parameters of groundwater, four wells in the El Golfo area were regularly sampled since July 2011

  6. Ultramafic Volcanism Associated With the El Golfo Giant Lateral Collapse, El Hierro, Canary Islands

    NASA Astrophysics Data System (ADS)

    Longpré, M.; Troll, V. R.; Hansteen, T. H.; Walter, T. R.

    2006-12-01

    It is firmly established that giant landslides play a key role in the evolution of ocean island volcanoes. On- and off-shore studies of e.g. Réunion Island, the Hawaiian, Canarian, and Cape Verdean archipelagoes confirm enormous landslide volumes up to thousands of km3 and runout distances frequently exceeding a hundred km [1]. Accelerated post-collapse volcanism has been witnessed at strato-volcanoes (e.g. Bezymianny, Mt. St. Helens), but may also be common for shield-volcanoes (Waianae, Oahu [2]; Teno, Tenerife [3]). The extent of this phenomenon and its consequences for the magmatic plumbing system of the volcanic edifice are poorly constrained. Between 15-134 ka, the El Golfo giant lateral collapse removed a 150-180 km3 sector of the volcanic edifice of El Hierro, the youngest and westernmost of the Canary Islands. Although no major volcanic edifice has been established since the collapse, post-El Golfo landslide volcanic vents concentrate at the base of the collapse scarp while additonal eruptions occurred along the triaxial rift system of the island [4]. Whilst pre- collapse volcanics include relatively differentiated rocks (up to trachytes, SiO2 ~55 wt%, MgO ~1.5 wt% [4]), a drastic change in the volcanic regime is reflected in the post-collapse eruptions of crystal-rich (up to 60 volume %, with megacrysts up to 3 cm in size) lava flows and pyroclastics (basanites, ankaramites, and picrites, SiO2 <45 wt%, MgO = 6-15 wt%). Chemical thermobarometry [5] using augite and olivine (Fo 71-81) rims, fused groundmass, and whole rock compositions of post-collapse samples indicates that crystallisation mostly occurred in the uppermost mantle at pressures and temperatures in the range of 7-13 kbar and 1150-1250°C, respectively. Most volcanics include several crystal populations, including complex normal and reverse zonation patterns. Narrow outer rims (last ~20 μm) of the augite and olivine crystals commonly show a sharp decrease in Mg# (from ~80 to ~70). We propose

  7. Sobre las soluciones acotadas del problema instantáneo de dos cuerpos

    NASA Astrophysics Data System (ADS)

    Altavista, C.

    La demostración se basa en el hecho de que las integrales del problema de los N-cuerpos admiten componentes en el campo complejo según las raíces n-ésimas de la unidad. Definida la matriz unitaria correspondiente, la fórmula de Cayley permite transformar la matriz unitaria en una matriz hermitiana. Utilizando como parámetros los cosenos direccionales de un sistema de coordenadas orbitales referidos a un sistema de referencia fijo, puede construirse, utilizando el operador hermitiano antes definido, una forma cuadrática cuyas raíces mínima y máxima definen las cotas respectivas de los movimientos de los mencionados cosenos direccionales.

  8. Xenopumice erupted on 15 October 2011 offshore of El Hierro (Canary Islands): a subvolcanic snapshot of magmatic, hydrothermal and pyrometamorphic processes

    NASA Astrophysics Data System (ADS)

    Del Moro, S.; Di Roberto, A.; Meletlidis, S.; Pompilio, M.; Bertagnini, A.; Agostini, S.; Ridolfi, F.; Renzulli, A.

    2015-06-01

    On 15 October 2011, a submarine eruption offshore of El Hierro Island gave rise to floating volcanic products, known as xenopumices, i.e., pumiceous xenoliths partly mingled and coated with the juvenile basanitic magma. Over the last few years, no consensus in the scientific community in explaining the origin of these products has been reached. In order to better understand the formation of xenopumice, we present a textural, mineralogical, and geochemical study of the possible magmatic, hydrothermal, and pyrometamorphic processes, which usually operate in the plumbing systems of active volcanoes. We carried out a comprehensive SEM investigation and Sr-Nd-Pb isotope analyses on some samples representative of three different xenopumice facies. All the data were compared with previous studies, new data for El Hierro extrusives and a literature dataset of Canary Islands igneous and sedimentary rocks. In the investigated xenopumices, we emphasize the presence of restitic magmatic phases as well as crystallization of minerals (mainly olivine + pyroxene + magnetite aggregates) as pseudomorphs after pre-existing mafic phenocrysts, providing evidence of pyrometamorphism induced by the high-T juvenile basanitic magma. In addition, we identify veins consisting of zircon + REE-oxides + mullite associated with Si-rich glass and hydrothermal quartz, which indicate the fundamental role played by hydrothermal fluid circulation in the xenopumice protolith. The petrological data agree with a pre-syneruptive formation of the xenopumice, when El Hierro basanite magma intruded hydrothermally altered trachyandesite to trachyte rocks and triggered local partial melting. Therefore, the El Hierro xenopumice represents a snapshot of the transient processes at the magma-wall rock interface, which normally occurs in the feeding system of active volcanoes.

  9. On the detection of thermohygrometric differences of Juniperus turbinata habitat between north and south faces in the island of El Hierro (Canary Islands)

    NASA Astrophysics Data System (ADS)

    Salva-Catarineu, Montserrat; Salvador-Franch, Ferran; Lopez-Bustins, Joan A.; Padrón-Padrón, Pedro A.; Cortés-Lucas, Amparo

    2016-04-01

    The current extent of Juniperus turbinata in the island of El Hierro is very small due to heavy exploitation for centuries. The recovery of its natural habitat has such a high environmental and scenic interest since this is a protected species in Europe. The study of the environmental factors that help or limit its recovery is indispensable. Our research project (JUNITUR) studied the populations of juniper woodlands in El Hierro from different environments. These environments are mainly determined by their altitude and exposure to north-easterly trade winds. The main objective of this study was to compare the thermohygrometric conditions of three juniper woodlands: La Dehesa (north-west face at 528 m a.s.l.), El Julan (south face at 996 m a.s.l.) and Sabinosa (north face at 258 m a.s.l.). They are located at different altitude and orientation in El Hierro and present different recovery rates. We used air sensor data loggers fixed to tree branches for recording hourly temperature and humidity data in the three study areas. We analysed daily data of three annual cycles (from September 2012 to August 2015). Similar thermohygrometric annual cycles among the three study areas were observed. We detected the largest differences in winter temperature and summer humidity between the north (to windward) (Sabinosa and La Dehesa) and south (to leeward) (El Julan) faces of the island. The juniper woodland with a highest recovery rate (El Julan) showed the most extreme temperature conditions in both winter and summer seasons. The results of this project might contribute to the knowledge of the juniper bioclimatology in El Hierro, where there is the biggest population of Juniperus turbinata throughout the Canary Islands.

  10. Diffuse H_{2} emission: a useful geochemical tool to monitor the volcanic activity at El Hierro volcano system

    NASA Astrophysics Data System (ADS)

    Pérez, Nemesio M.; Melián, Gladys; González-Santana, Judit; Barrancos, José; Padilla, Germán; Rodríguez, Fátima; Padrón, Eleazar; Hernández, Pedro A.

    2016-04-01

    The occurrence of interfering processes affecting reactive gases as CO2 during its ascent from magmatic bodies or hydrothermal systems toward the surface environment hinders the interpretation of their enrichments in the soil atmosphere and fluxes for volcano monitoring purposes (Marini and Gambardella, 2005). These processes include gas scrubbing by ground-waters and interaction with rocks, decarbonatation processes, biogenic production, etc. Within the rest of the soil gases, particularly interest has been addressed to light and highly mobile gases. They offer important advantages for the detection of vertical permeability structures, because their interaction with the surrounding rocks or fluids during the ascent toward the surface is minimum. H2 is one of the most abundant trace species in volcano-hydrothermal systems and is a key participant in many redox reactions occurring in the hydrothermal reservoir gas (Giggenbach, 1987). Although H2 can be produced in soils by N2-fixing and fertilizing bacteria, soils are considered nowadays as sinks of molecular hydrogen (Smith-Downey et al., 2006). Because of its chemical and physical characteristics, H2 generated within the crust moves rapidly and escapes to the atmosphere. These characteristics make H2 one of the best geochemical indicators of magmatic and geothermal activity at depth. El Hierro is the youngest and the SW-most of the Canary Islands and the scenario of the last volcanic eruption of the archipelago, a submarine eruption that took place 2 km off the southern coast of the island from October 2011 to March 2012. Since at El Hierro Island there are not any surface geothermal manifestations (fumaroles, etc), we have focused our studies on soil degassing surveys. Here we show the results of soil H2 emission surveys that have been carried out regularly since mid-2012. Soil gas samples were collected in ˜600 sites selected based on their accessibility and geological criteria. Soil gases were sampled at ˜40

  11. The 2011 El Hierro submarine eruption: estimation of erupted lava flow volume on the basis of helicopter thermal surveys

    NASA Astrophysics Data System (ADS)

    Hernández, P. A.; Calvari, S.; Calvo, D.; Marquez, A.; Padron, E.; Pérez, N.; Melian, G.; Padilla, G.; Barrancos, J.; Dionis, S.; Rodríguez, F.; Nolasco, D.; Hernández, I.

    2012-04-01

    El Hierro represents the summit of a volcanic shield elevating from the surrounding seafloor at depth of 4000 m to up to 1501 m above sea level. The island is believed to be near the present hotspot location in the Canaries with the oldest subaerial rocks dated at 1.12 Ma. The subaerial parts of the El Hierro rift zones (NE, NW and S Ridges) are characterized by tightly aligned dyke complexes with clusters of cinder cones as their surface expressions. Since 16 July, an anomalous seismicity at El Hierro Island was recorded by IGN seismic network. After the occurrence of more than 10,000 seismic events, volcanic tremor started at 05:15 on 10 October, followed on the afternoon of 12 October by a green discolouration of seawater, strong bubbling and degassing, and abundant bombs on a decimetre scale found floating on the ocean surface offshore, southwest of La Restinga village. The Canary Government raised the alert level from green to yellow on 10 October (3 colour basis: green, yellow, and red). Further episodes have occurred during November, December 2011 and January 2012, with turbulent water, foam rings, and volcanic material again reaching the sea surface. Colour of the discoloured area has changed frequently from light green to dark brown, depending on the eruptive activity. During the whole eruptive period, The Volcanological Institute of Canary Islands and the Helicopter Unit of the Spanish Civil Guard have carried out regularly thermal surveys with a hand held FLIR Thermal Camera P65. The images have been collected taking care of avoiding solar reflection (with cloudy weather) or at times of the day without direct sun light. Air temperature and humidity were measured with a handled thermo-hygrometer every time before the thermal image collection, and measurements were always performed at two fixed heights: 2000 and 1000 feet, and images were collected as perpendicular as possible to the surface. Together with thermal images, digital photos of the surface have

  12. Deployment of a seismic array for volcano monitoring during the ongoing submarine eruption at El Hierro, Canary Islands

    NASA Astrophysics Data System (ADS)

    Abella, R.; Almendros, J.; Carmona, E.; Martin, R.

    2012-04-01

    On 17 July 2011 there was an important increase of the seismic activity at El Hierro (Canary Islands, Spain). This increase was detected by the Volcano Monitoring Network (Spanish national seismic network) run by the Instituto Geográfico Nacional (IGN). As a consequence, the IGN immediately deployed a dense, complete monitoring network that included seismometers, GPS stations, geochemical equipment, magnetometers, and gravity meters. During the first three months of activity, the seismic network recorded over ten thousand volcano-tectonic earthquakes, with a maximum magnitude of 4.6. On 10 October 2011 an intense volcanic tremor started. It was a monochromatic signal, with variable amplitude and frequency content centered at about 1-2 Hz. The tremor onset was correlated with the initial stages of the submarine eruption that occurred from a vent located south of El Hierro island, near the village of La Restinga. At that point the IGN, in collaboration with the Instituto Andaluz de Geofísica, deployed a seismic array intended for volcanic tremor monitoring and analysis. The seismic array is located about 7 km NW of the submarine vent. It has a 12-channel, 24-bit data acquisition system sampling each channel at 100 sps. The array is composed by 1 three-component and 9 vertical-component seismometers, distributed in a flat area with an aperture of 360 m. The data provided by the seismic array are going to be processed using two different approaches: (1) near-real-time, to produce information that can be useful in the management of the volcanic crisis; and (2) detailed investigations, to study the volcanic tremor characteristics and relate them to the eruption dynamics. At this stage we are mostly dedicated to produce fast, near-real-time estimates. Preliminary results have been obtained using the maximum average cross-correlation method. They indicate that the tremor wavefronts are highly coherent among array stations and propagate across the seismic array with an

  13. Development and recent activity of the San Andrés landslide on El Hierro, Canary Islands, Spain

    NASA Astrophysics Data System (ADS)

    Klimeš, Jan; Yepes, Jorge; Becerril, Laura; Kusák, Michal; Galindo, Inés; Blahut, Jan

    2016-05-01

    Extremely voluminous landslides with a long run-out (also known as megalandslides) on oceanic volcanic islands are infrequent denudational processes on such islands. At the same time, they represent a major geological hazard that must be looked into to avoid negative consequences for the inhabitants of these islands. Their occurrence can be related to periods of intense seismo-volcanic activity, similar to that which occurred on El Hierro Island over 2011-2012. Landslides on volcanic islands are studied using onshore and offshore geological, geophysical and geomorphological records, considering their unique triggering conditions (e.g. lava intrusions, eruptive vents, magma chamber collapses). Previous work has pointed out similarities between specific cases of landslides on volcanic islands and deep-seated gravitational slope deformations (DSGSDs) which are typical in high mountain settings. Nevertheless, the methodological approaches and concepts used to investigate DSGSDs are not commonly applied on volcanic islands studies, even though their use may provide new information about the development stage, recent movements and future hazards. Therefore, this approach for studying the San Andrés landslide (SAL) on El Hierro (Canary Islands) has been developed applying a detailed morphological field mapping, an interpretation of digital elevation models, structural measurements, kinematic testing, and a precise movement monitoring system. The acquired information revealed a strong structural influence on the landslide morphology and the presence of sets of weakened planes acting as the sliding surfaces of the SAL or secondary landslides within its body. The presence of secondary landslides, deep erosive gullies, coastal cliffs and high on-shore relative relief also suggests a high susceptibility to future landslide movement. Direct monitoring on the landslide scarps and the slip plane, performed between February 2013 and July 2014, using an automated optical

  14. Different deformation patterns using GPS in the volcanic process of El Hierro (Canary Island) 2011-2013

    NASA Astrophysics Data System (ADS)

    García-Cañada, Laura; José García-Arias, María; Pereda de Pablo, Jorge; Lamolda, Héctor; López, Carmen

    2014-05-01

    Ground deformation is one of the most important parameter in volcano monitoring. The detected deformations in volcanic areas can be precursors of a volcanic activity and contribute with useful information to study the evolution of an unrest, eruption or any volcanic process. GPS is the most common technique used to measure volcano deformations. It can be used to detect slow displacement rates or much larger and faster deformations associated with any volcanic process. In volcanoes the deformation is expected to be a mixed of nature; during periods of quiescence it will be slow or not present, while increased activity slow displacement rates can be detected or much larger and faster deformations can be measure due to magma intrusion, for example in the hours to days prior a eruption beginning. In response to the anomalous seismicity detected at El Hierro in July 2011, the Instituto Geográfico Nacional (IGN) improved its volcano monitoring network in the island with continuous GPS that had been used to measure the ground deformation associated with the precursory unrest since summer 2011, submarine eruption (October 2011-March 2012) and the following unrest periods (2012-2013). The continuous GPS time series, together with other techniques, had been used to evaluate the activity and to detect changes in the process. We investigate changes in the direction and module of the deformation obtained by GPS and they show different patterns in every unrest period, very close to the seismicity locations and migrations.

  15. A new Volcanic managEment Risk Database desIgn (VERDI): Application to El Hierro Island (Canary Islands)

    NASA Astrophysics Data System (ADS)

    Bartolini, S.; Becerril, L.; Martí, J.

    2014-11-01

    One of the most important issues in modern volcanology is the assessment of volcanic risk, which will depend - among other factors - on both the quantity and quality of the available data and an optimum storage mechanism. This will require the design of purpose-built databases that take into account data format and availability and afford easy data storage and sharing, and will provide for a more complete risk assessment that combines different analyses but avoids any duplication of information. Data contained in any such database should facilitate spatial and temporal analysis that will (1) produce probabilistic hazard models for future vent opening, (2) simulate volcanic hazards and (3) assess their socio-economic impact. We describe the design of a new spatial database structure, VERDI (Volcanic managEment Risk Database desIgn), which allows different types of data, including geological, volcanological, meteorological, monitoring and socio-economic information, to be manipulated, organized and managed. The root of the question is to ensure that VERDI will serve as a tool for connecting different kinds of data sources, GIS platforms and modeling applications. We present an overview of the database design, its components and the attributes that play an important role in the database model. The potential of the VERDI structure and the possibilities it offers in regard to data organization are here shown through its application on El Hierro (Canary Islands). The VERDI database will provide scientists and decision makers with a useful tool that will assist to conduct volcanic risk assessment and management.

  16. Seismic hydraulic fracture migration originated by successive deep magma pulses: The 2011-2013 seismic series associated to the volcanic activity of El Hierro Island

    NASA Astrophysics Data System (ADS)

    Díaz-Moreno, A.; Ibáñez, J. M.; De Angelis, S.; García-Yeguas, A.; Prudencio, J.; Morales, J.; Tuvè, T.; García, L.

    2015-11-01

    In this manuscript we present a new interpretation of the seismic series that accompanied eruptive activity off the coast of El Hierro, Canary Islands, during 2011-2013. We estimated temporal variations of the Gutenberg-Richter b value throughout the period of analysis, and performed high-precision relocations of the preeruptive and syneruptive seismicity using a realistic 3-D velocity model. Our results suggest that eruptive activity and the accompanying seismicity were caused by repeated injections of magma from the mantle into the lower crust. These magma pulses occurred within a small and well-defined volume resulting in the emplacement of fresh magma along the crust-mantle boundary underneath El Hierro. We analyzed the distribution of earthquake hypocenters in time and space in order to assess seismic diffusivity in the lower crust. Our results suggest that very high earthquake rates underneath El Hierro represent the response of a stable lower crust to stress perturbations with pulsatory character, linked to the injection of magma from the mantle. Magma input from depth caused large stress perturbations to propagate into the lower crust generating energetic seismic swarms. The absence of any preferential alignment in the spatial pattern of seismicity reinforces our hypothesis that stress perturbation and related seismicity, had diffusive character. We conclude that the temporal and spatial evolution of seismicity was neither tracking the path of magma migration nor it defines the boundaries of magma storage volumes such as a midcrustal sill. Our conceptual model considers pulsatory magma injection from the upper mantle and its propagation along the Moho. We suggest, within this framework, that the spatial and temporal distributions of earthquake hypocenters reflect hydraulic fracturing processes associated with stress propagation due to magma movement.

  17. Submarine seismic monitoring of El Hierro volcanic eruption with a 3C-geophone string: applying new acquisition and data processing techniques to volcano monitoring

    NASA Astrophysics Data System (ADS)

    Jurado, Maria Jose; Ripepe, Maurizio; Lopez, Carmen; Blanco, Maria Jose; Crespo, Jose

    2015-04-01

    A submarine volcanic eruption took place near the southernmost emerged land of the El Hierro Island (Canary Islands, Spain), from October 2011 to February 2012. The Instituto Geografico Nacional (IGN) seismic stations network evidenced seismic unrest since July 2011 and was a reference also to follow the evolution of the seismic activity associated with the volcanic eruption. Right after the eruption onset, in October 2011 a geophone string was deployed by the CSIC-IGN to monitor seismic activity. Monitoring with the seismic array continued till May 2012. The array was installed less than 2 km away from the new vol¬cano, next to La Restinga village shore in the harbor from 6 to 12m deep into the water. Our purpose was to record seismic activity related to the volcanic activity, continuously and with special interest on high frequency events. The seismic array was endowed with 8, high frequency, 3 component, 250 Hz, geophone cable string with a separation of 6 m between them. Each geophone consists on a 3-component module based on 3 orthogonal independent sensors that measures ground velocity. Some of the geophones were placed directly on the seabed, some were buried. Due to different factors, as the irregular characteristics of the seafloor. The data was recorded on the surface with a seismometer and stored on a laptop computer. We show how acoustic data collected underwater show a great correlation with the seismic data recorded on land. Finally we compare our data analysis results with the observed sea surface activity (ash and lava emission and degassing). This evidence is disclosing new and innovative tecniques on monitoring submarine volcanic activity. Reference Instituto Geográfico Nacional (IGN), "Serie El Hierro." Internet: http://www.ign.es/ign/resources /volcanologia/HIERRO.html [May, 17. 2013

  18. Floating stones off El Hierro, Canary Islands: xenoliths of pre-island sedimentary origin in the early products of the October 2011 eruption

    NASA Astrophysics Data System (ADS)

    Troll, V. R.; Klügel, A.; Longpré, M.-A.; Burchardt, S.; Deegan, F. M.; Carracedo, J. C.; Wiesmaier, S.; Kueppers, U.; Dahren, B.; Blythe, L. S.; Hansteen, T. H.; Freda, C.; Budd, D. A.; Jolis, E. M.; Jonsson, E.; Meade, F. C.; Harris, C.; Berg, S. E.; Mancini, L.; Polacci, M.; Pedroza, K.

    2012-03-01

    A submarine eruption started off the south coast of El Hierro, Canary Islands, on 10 October 2011 and continues at the time of this writing (February 2012). In the first days of the event, peculiar eruption products were found floating on the sea surface, drifting for long distances from the eruption site. These specimens, which have in the meantime been termed "restingolites" (after the close-by village of La Restinga), appeared as black volcanic "bombs" that exhibit cores of white and porous pumice-like material. Since their brief appearance, the nature and origin of these "floating stones" has been vigorously debated among researchers, with important implications for the interpretation of the hazard potential of the ongoing eruption. The "restingolites" have been proposed to be either (i) juvenile high-silica magma (e.g. rhyolite), (ii) remelted magmatic material (trachyte), (iii) altered volcanic rock, or (iv) reheated hyaloclastites or zeolite from the submarine slopes of El Hierro. Here, we provide evidence that supports yet a different conclusion. We have analysed the textures and compositions of representative "restingolites" and compared the results to previous work on similar rocks found in the Canary Islands. Based on their high-silica content, the lack of igneous trace element signatures, the presence of remnant quartz crystals, jasper fragments and carbonate as well as wollastonite (derived from thermal overprint of carbonate) and their relatively high oxygen isotope values, we conclude that "restingolites" are in fact xenoliths from pre-island sedimentary layers that were picked up and heated by the ascending magma, causing them to partially melt and vesiculate. As they are closely resembling pumice in appearance, but are xenolithic in origin, we refer to these rocks as "xeno-pumice". The El Hierro xeno-pumices hence represent messengers from depth that help us to understand the interaction between ascending magma and crustal lithologies beneath the

  19. El problema de estabilidad de los sistemas Hamiltonianos multidimensionales

    NASA Astrophysics Data System (ADS)

    Cincotta, P. M.

    Se revisarán los aspectos básicos del problema de estabilidad de sistemans Hamiltonianos N-dimensionales, haciendo especial énfasis en los posibles mecanismos que dan lugar a la aparición de ``caos": overlap de resonancias, difusión de Arnol'd y otros procesos difusivos alternativos. Se mencionarán los aspectos aún no resueltos sobre la estabilidad de los sistemas con N > 2. Finalmente, se discutirá cuáles de estos mecanismos podrían tener alguna relevancia en la dinámica de sistemas estelares y planetarios.

  20. Crustal Deformation During the 2011 Volanic Crisis of El Hierro, Canary Islands, Revealed by Continuous GPS Observation

    NASA Astrophysics Data System (ADS)

    Sagiya, T.; Barrancos Martinez, J.; Calvo, D.; Padron, E.; Hernandez, G. H.; Hernández, P. A.; Perez Rodriguez, N.; Suárez, J. M. P.

    2012-04-01

    Seismo-volcnic activity of El Hierro started in the middle of July of 2011 and resulted in the active submarine eruption after October 12 south off La Restinga, the southern tip of the island. We have been operating one continuous GPS site on the island since 2004. Responding to the activity, we quickly installed 5 more GPS sites. Including another site operated by the Canary Islands Cartograhical Service (GRAFCAN) for a cartographic purpose, we have been monitoring 7 GPS sites equipped with dual-frequency receivers. We present the result of our crustal deformation monitoring and the magmatic activity inferred from the deformation data. In accordance with the deformation pattern, we divide the volcanic activity in 2011 into 4 stages. The first stage is from the middle of July to middle of September, during which steady magmatic inflation is estimated at the center of the island. The inflated volume of the first stage is estimated to be about 1.3 X 107 m3 at the depth of about 5km. The second stage, which continued until the first submarine eruption on October 12, is characterized by the accelerated deformation due to the upward as well as southward migration of magma. Additional inflation of about 2.1 X 107 m3 occurred in the depth range of 1-2km. The third stage continued for about 3 weeks after the first submarine eruption. During this stage, submarine eruption continues while no significant surface deformation is observed. It is considered magma supply from a deeper magma chamber continued during this 3 weeks period. Therefore, the total inflation volume during the first two stages gives the minimum estimate for the total magma volume. Since the beginning of November 2011, many GPS sites started subsiding. However, this deflation pattern is quite different from those in the shallow inflation stages. Horizontal deformation during this 4th stage is not significant, implying that deflation is occurring below the moho.

  1. Isolation and Molecular Identification of Vermamoeba vermiformis Strains from Soil Sources in El Hierro Island, Canary Islands, Spain.

    PubMed

    Reyes-Batlle, María; Wagner, Carolina; Zamora-Herrera, Jonadab; Vargas-Mesa, Alejandro; Sifaoui, Ines; González, Ana C; López-Arencibia, Atteneri; Valladares, Basilio; Martínez-Carretero, Enrique; Piñero, José E; Lorenzo-Morales, Jacob

    2016-07-01

    Free-living amoebae (FLA) are widely distributed protozoa in the environment and have been isolated from many sources such as dust, soil and water. Furthermore, some genera/species of FLA such as Naegleria fowleri, Balamuthia mandrillaris and Acanthamoeba spp. are also able to cause opportunistic infections in humans and other animals. More recently, FLA have been reported to be environmental carriers of pathogenic bacteria, fungi and viruses, and thus have gained further importance from the public health point of view. Among them, Acanthamoeba spp. and Vermamoeba vermiformis have been described in many occasions as the most common carriers of pathogens of high medical relevance such as Legionella pneumophila and Mycobacterium spp. In this study, 24 soil samples were collected from the island of El Hierro, Canary Islands, Spain, in order to check for the presence of V. vermiformis strains in these samples. Soil samples were cultured on 2 % non-nutrient agar plates covered with a thin layer of heat-killed E. coli and checked daily for the presence of Vermamoeba. After a week, V. vermiformis amoebae were observed in 5 of the 24 processed samples (20.8 %) incubated at room temperature and 37 °C. Molecular characterization was carried out by amplifying the 18S rDNA gene and DNA sequencing, confirming that the isolated strains belonged to Vermamoeba vermiformis species. The high percentage of V. vermiformis in the studied soil sources should raise awareness in the region since these amoebae are potential environmental carriers of pathogens of high medical relevance.

  2. CO2-SO3-rich (carbonate-sulfate) melt/fluids in the lithosphere beneath El Hierro, Canary Islands.

    NASA Astrophysics Data System (ADS)

    Oglialoro, E.; Ferrando, S.; Malaspina, N.; Villa, I. M.; Frezzotti, M. L.

    2015-12-01

    Mantle xenoliths from the island of El Hierro, the youngest of the Canary Islands, have been studied to characterize fluxes of carbon in the lithosphere of an OIB volcanism region. Fifteen xenoliths (4-10 cm in diameter) were collected in a rift lava flow (15-41 ka) at a new xenolith locality in El Julan cliff (S-SW of the island). Peridotites consist of protogranular to porphyroblastic spinel harzburgites, lherzolites, and subordinate dunites. One spinel clinopyroxenite, and one olivine-websterite were also analyzed. Ultramafic xenoliths were classified as HEXO (harzburgite and dunite with exsolved orthopyroxene), HLCO (harzburgite and lherzolite containing orthopyroxene without visible exsolution lamellae), and HTR (transitional harzburgite with exsolved orthopyroxene porphyroclasts, and poikilitic orthopyroxene) following [1]. While HLCO and HTR peridotites contain mostly CO2 fluid inclusions, HEXO peridotites preserve an early association of melt/fluid inclusions containing dominantly carbonate/sulfate/silicate glass, evolving to carbonate/sulfate/phosphate/spinel aggregates, with exsolved CO2 (± carbonates, anhydrite and H2O). Chemical and Raman analyses identify dolomite, Mg-calcite, anhydrite, sulfohalite [Na6(SO4)2FCl] (± other anhydrous and hydrous alkali-sulfates), apatite, and Cr-spinel in the inclusions. Sulfides are noticeably absent. The microstructure and chemical composition of the metasomatic fluids indicate that the peridotites were infiltrated by a carbonate-sulfate-silicate melt/fluid enriched in CO2, H2O, and P. A mantle origin for this fluid is supported by high densities of CO2inclusions (> 1g/cm3), determined by Raman microspectroscopy and cross-checked by microthermometry. Consequently, El Julan peridotites provide the first evidence for liberating oxidized C and S fluxes from the Earth lithosphere in an OIB source region, and suggest that oxidation of sulfide to sulfate can occur during small-degree partial melting of the upper mantle

  3. Volcanic hazard assessment for the Canary Islands (Spain) using extreme value theory, and the recent volcanic eruption of El Hierro

    NASA Astrophysics Data System (ADS)

    Sobradelo, R.; Martí, J.; Mendoza-Rosas, A. T.; Gómez, G.

    2012-04-01

    The Canary Islands are an active volcanic region densely populated and visited by several millions of tourists every year. Nearly twenty eruptions have been reported through written chronicles in the last 600 years, suggesting that the probability of a new eruption in the near future is far from zero. This shows the importance of assessing and monitoring the volcanic hazard of the region in order to reduce and manage its potential volcanic risk, and ultimately contribute to the design of appropriate preparedness plans. Hence, the probabilistic analysis of the volcanic eruption time series for the Canary Islands is an essential step for the assessment of volcanic hazard and risk in the area. Such a series describes complex processes involving different types of eruptions over different time scales. Here we propose a statistical method for calculating the probabilities of future eruptions which is most appropriate given the nature of the documented historical eruptive data. We first characterise the eruptions by their magnitudes, and then carry out a preliminary analysis of the data to establish the requirements for the statistical method. Past studies in eruptive time series used conventional statistics and treated the series as an homogeneous process. In this paper, we will use a method that accounts for the time-dependence of the series and includes rare or extreme events, in the form of few data of large eruptions, since these data require special methods of analysis. Hence, we will use a statistical method from extreme value theory. In particular, we will apply a non-homogeneous Poisson process to the historical eruptive data of the Canary Islands to estimate the probability of having at least one volcanic event of a magnitude greater than one in the upcoming years. Shortly after the publication of this method an eruption in the island of El Hierro took place for the first time in historical times, supporting our method and contributing towards the validation of

  4. Three-armed rifts or masked radial pattern of eruptive fissures? The intriguing case of El Hierro volcano (Canary Islands)

    NASA Astrophysics Data System (ADS)

    Becerril, L.; Galindo, I.; Martí, J.; Gudmundsson, A.

    2015-04-01

    Using new surface structural data as well as subsurface structural data obtained from seventeen water galleries, we provide a comprehensive model of the volcano-tectonic evolution of El Hierro (Canary Islands). We have identified, measured and analysed more than 1700 volcano-structural elements including vents, eruptive fissures, dykes and faults. The new data provide important information on the main structural patterns of the island and on its stress and strain fields, all of which are crucial for reliable hazard assessments. We conducted temporal and spatial analyses of the main structural elements, focusing on their relative age and association with the three main cycles in the construction of the island: the Tiñor Edifice, the El Golfo-Las Playas Edifice, and the Rift Volcanism. A radial strike distribution, which can be related to constructive episodes, is observed in the on-land structures. A similar strike distribution is seen in the submarine eruptive fissures, which are radial with respect to the centre of the island. However, the volcano-structural elements identified onshore and reflecting the entire volcano-tectonic evolution of the island also show a predominant NE-SW strike, which coincides with the main regional trend of the Canary archipelago as a whole. Two other dominant directions of structural elements, N-S and WNW-ESE, are evident from the establishment of the El Golfo-Las Playas edifice, during the second constructive cycle. We suggest that the radial-striking structures reflect comparatively uniform stress fields during the constructive episodes, mainly conditioned by the combination of overburden pressure, gravitational spreading, and magma-induced stresses in each of the volcanic edifices. By contrast, in the shallower parts of the edifice the NE-SW, N-S and WNW-ESE-striking structures reflect local stress fields related to the formation of mega-landslides and masking the general and regional radial patterns.

  5. Assessing the vulnerability of the evacuation emergency plan: the case of the El Hierro, Canary Island, Spain

    NASA Astrophysics Data System (ADS)

    Marrero, J. M.; Garcia, A.; Llinares, A.; Lopez, P.; Ortinz, R.

    2012-04-01

    On July 17, 2011 an unrest was detected in the El Hierro island. A serretian submarine eruption started on October 10th in the southern area of the island, two miles away from La Restinga village. The analysis and interpretation of seismic and deformation data show a large volume of intruded magma. These data also show a high probability of a new vent opening. One of the most complex volcanic hazard scenarios is a new open vent in the El Golfo Valley, in the north slope of the island, where more than 5,000 people live. In this area there are only two possible terrestrial evacuation routes: 1) HI-1 road NE direction, the fastest but most vulnerable one, very near a 1,000 meters height cliff and through a 2 km tunnel with a structural deficiency that had to be closed during high energy periods of seismic activity; and 2) HI-1 road SW direction, a mountain road with many curves, frequent small landslides and fog. The Emergency Plan of the island takes into account the entire evacuation of El Golfo Valley in case of eruption. This process will be carried out by means of an assisted evacuation. The evacuees will be transported to a temporally regrouping shelter outside the valley to organize the transport to Tenerife Island. Only those people who have a second residence or relatives outside the affected area will be able to remain in the island. The evacuation time estimated by authorities for the entire evacuation of El Golfo Valley is of about 4 hours. This is extremely low considering: the complexity of the area; the number of evacuees; the lack of preparedness by the population; and adverse weather conditions. To evaluate the Evacuation Plan vulnerability, a series of evacuation scenarios have been simulated: self-evacuation; assisted evacuation; both terrestrial evacuation routes. The warning time, the response time by the population and the evacuation time have been taken into account.

  6. Xenopumices from the 2011-2012 submarine eruption of El Hierro (Canary Islands, Spain): Constraints on the plumbing system and magma ascent

    NASA Astrophysics Data System (ADS)

    Meletlidis, S.; Di Roberto, A.; Pompilio, M.; Bertagnini, A.; Iribarren, I.; Felpeto, A.; Torres, P. A.; D'Oriano, C.

    2012-09-01

    Textures, petrography and geochemical compositions of products emitted during the onset of the 2011-2012 submarine eruption (15 October, 2011) off the coast of El Hierro have been investigated to get information on interaction mechanism between the first rising magma and the crust during the onset of the eruption as well as to get information on magma storage and plumbing systems beneath El Hierro volcano. Studied products consist of 5-50 cm bombs with an outer black to greenish, vesicular crust with bulk basanite composition containing pumiceous xenoliths (xenopumices). Our results show that xenopumices are much more heterogeneous that previously observed, since consist of a macro-scale mingling of a gray trachyte and white rhyolite. We interpreted xenopumices as resulting from the interaction (heating) between the basanitic magma feeding the eruption, a stagnant trachytic magma pocket/s and an associated hydrothermally altered halo with rhyolitic composition. Our findings confirm the importance of the study of the early products of an eruption since they can contain crucial information on the plumbing system geometry and the mechanism of magma ascent.

  7. Relative and probabilistic non linear relocation of the seismicity of El Hierro (Canary Islands, Spain): Implications for the 2011-2012 eruption.

    NASA Astrophysics Data System (ADS)

    Diaz-Moreno, Alejandro; Garcia-Yeguas, Araceli; De Angelis, Silvio; Prudencio, Janire; Ibañez, Jesus M.; Morales, José; Koulakov, Ivan

    2014-05-01

    El Hierro Island (Canary Islands, SPAIN) has recently attracted the interest of the international volcanological community. During a prolonged period of seismic and volcanic unrest, between July 2011 and April 2013, the local seismic network recorded more than 15,000 earthquakes accompanied by a submarine eruption. In this study we present an exhaustive relocation analysis of the original seismic catalog using two well established methods double-difference relative relocation (HypoDD), and probalistic non-linear location (NLLoc). Our relocations are based on 3D velocity models that were obtained from an active-source tomography experiment in the Canary Islands. The relocations constrain the spatial and temporal distribution of seismicity, and help to shed light on the patterns of stress propagation, and areas of crustal weakness under the island. The results show that the seismicity each of unrest recorded during this period is located within a small region close to the center of the island and located around 12 to 14 km depth. Then, the seismicity migrates away from the island. We confirm the presence of a high-velocity block centered underneath El Hierro (up to 15km depth) observed by other authors. This block may represent a barrier to magma propagation and it corresponds to the location of the bulk of seismicity at the beginning of each phase.

  8. Modelling framework developed for managing and forecasting the El Hierro 2011-2014 unrest processes based on the analysis of the seismicity and deformation data rate.

    NASA Astrophysics Data System (ADS)

    Garcia, Alicia; Fernandez-Ros, Alberto; Berrocoso, Manuel; Marrero, Jose Manuel; Prates, Gonçalo; De la Cruz-Reyna, Servando; Ortiz, Ramon

    2014-05-01

    In July 2011 at El Hierro (Canary Islands, Spain), a volcanic unrest was detected, with significant deformations followed by increased seismicity. A submarine eruption started on 10 October 2011 and ceased on 5 March 2012, after the volcanic tremor signals persistently weakened through February 2012. However, the seismic activity did not end when the eruption, as several other seismic crises followed since. The seismic episodes presented a characteristic pattern: over a few days the number and magnitude of seismic event increased persistently, culminating in seismic events severe enough to be felt all over the island. In all cases the seismic activity was preceded by significant deformations measured on the island's surface that continued during the whole episode. Analysis of the available GNSS-GPS and seismic data suggests that several magma injection processes occurred at depth from the beginning of the unrest. A model combining the geometry of the magma injection process and the variations in seismic energy released has allowed successful forecasting of the new-vent opening. The model presented here places special emphasis on phenomena associated to moderate eruptions, as well as on volcano-tectonic earthquakes and landslides, which in some cases, as in El Hierro, may be more destructive than an eruption itself.

  9. Spatial and temporal variations of diffuse CO2 degassing at El Hierro volcanic system: Relation to the 2011-2012 submarine eruption

    NASA Astrophysics Data System (ADS)

    Melián, Gladys; Hernández, Pedro A.; Padrón, Eleazar; Pérez, Nemesio M.; Barrancos, José; Padilla, Germán.; Dionis, Samara; Rodríguez, Fátima; Calvo, David; Nolasco, Dacil

    2014-09-01

    We report herein the results of extensive diffuse CO2 emission surveys performed on El Hierro Island in the period 1998-2012. More than 17,000 measurements of the diffuse CO2 efflux were carried out, most of them during the volcanic unrest period that started in July 2011. Two significant precursory signals based on geochemical and geodetical studies suggest that a magma intrusion processes might have started before 2011 in El Hierro Island. During the preeruptive and eruptive periods, the time series of the diffuse CO2 emission released by the whole island experienced two significant increases. The first started almost 2 weeks before the onset of the submarine eruption, reflecting a clear geochemical anomaly in CO2 emission, most likely due to increasing release of deep-seated magmatic gases to the surface. The second one, between 24 October and 27 November 2011, started before the most energetic seismic events of the volcanic-seismic unrest. The data presented here demonstrate that combined continuous monitoring studies and discrete surveys of diffuse CO2 emission provide important information to optimize the early warning system in volcano monitoring programs and to monitor the evolution of an ongoing volcanic eruption, even though it is a submarine eruption.

  10. Short-term volcano-tectonic earthquake forecasts based on a moving mean recurrence time algorithm: the El Hierro seismo-volcanic crisis experience

    NASA Astrophysics Data System (ADS)

    García, Alicia; De la Cruz-Reyna, Servando; Marrero, José M.; Ortiz, Ramón

    2016-05-01

    Under certain conditions, volcano-tectonic (VT) earthquakes may pose significant hazards to people living in or near active volcanic regions, especially on volcanic islands; however, hazard arising from VT activity caused by localized volcanic sources is rarely addressed in the literature. The evolution of VT earthquakes resulting from a magmatic intrusion shows some orderly behaviour that may allow the occurrence and magnitude of major events to be forecast. Thus governmental decision makers can be supplied with warnings of the increased probability of larger-magnitude earthquakes on the short-term timescale. We present here a methodology for forecasting the occurrence of large-magnitude VT events during volcanic crises; it is based on a mean recurrence time (MRT) algorithm that translates the Gutenberg-Richter distribution parameter fluctuations into time windows of increased probability of a major VT earthquake. The MRT forecasting algorithm was developed after observing a repetitive pattern in the seismic swarm episodes occurring between July and November 2011 at El Hierro (Canary Islands). From then on, this methodology has been applied to the consecutive seismic crises registered at El Hierro, achieving a high success rate in the real-time forecasting, within 10-day time windows, of volcano-tectonic earthquakes.

  11. Insights into the 2011-2012 submarine eruption off the coast of El Hierro (Canary Islands, Spain) from statistical analyses of earthquake activity

    NASA Astrophysics Data System (ADS)

    Ibáñez, J. M.; De Angelis, S.; Díaz-Moreno, A.; Hernández, P.; Alguacil, G.; Posadas, A.; Pérez, N.

    2012-08-01

    The purpose of this work is to gain insights into the 2011-2012 eruption of El Hierro (Canary Islands) by mapping the evolution of the seismic b-value. The El Hierro seismic sequence offers a rather unique opportunity to investigate the process of reawakening of an oceanic intraplate volcano after a long period of repose. The 2011-2012 eruption is a submarine volcanic event that took place about 2 km off of the southern coast of El Hierro. The eruption was accompanied by an intense seismic swarm and surface manifestations of activity. The earthquake catalogue during the period of unrest includes over 12 000 events, the largest with magnitude 4.6. The seismic sequence can be grouped into three distinct phases, which correspond to well-separated spatial clusters and distinct earthquake regimes. The estimated b-value is of 1.18 ± 0.03, and a magnitude of completeness of 1.3, for the entire catalogue. B is very close to 1.0, which indicates completeness of the earthquake catalogue with only minor departures from the linearity of Gutenberg-Richter frequency-magnitude distribution. The most straightforward interpretation of this result is that the seismic swarm reached its final stages, and no additional large magnitude events should be anticipated, similarly to what one would expect for non-volcanic earthquake sequences. The results, dividing the activity in different phases, illustrate remarkable differences in the estimate of b-value during the early and late stages of the eruption. The early pre-eruptive activity was characterized by a b-value of 2.25. In contrast, the b-value was 1.25 during the eruptive phase. Based on our analyses, and the results of other studies, we propose a scenario that may account for the observations reported in this work. We infer that the earthquakes that occurred in the first phase reflect magma migration from the upper mantle to crustal depths. The area where magma initially intruded into the crust, because of its transitional nature

  12. The submarine volcano eruption off El Hierro Island: effects on the scattering migrant biota and the evolution of the pelagic communities.

    PubMed

    Ariza, Alejandro; Kaartvedt, Stein; Røstad, Anders; Garijo, Juan Carlos; Arístegui, Javier; Fraile-Nuez, Eugenio; Hernández-León, Santiago

    2014-01-01

    The submarine volcano eruption off El Hierro Island (Canary Islands) on 10 October 2011 promoted dramatic perturbation of the water column leading to changes in the distribution of pelagic fauna. To study the response of the scattering biota, we combined acoustic data with hydrographic profiles and concurrent sea surface turbidity indexes from satellite imagery. We also monitored changes in the plankton and nekton communities through the eruptive and post-eruptive phases. Decrease of oxygen, acidification, rising temperature and deposition of chemicals in shallow waters resulted in a reduction of epipelagic stocks and a disruption of diel vertical migration (nocturnal ascent) of mesopelagic organisms. Furthermore, decreased light levels at depth caused by extinction in the volcanic plume resulted in a significant shallowing of the deep acoustic scattering layer. Once the eruption ceased, the distribution and abundances of the pelagic biota returned to baseline levels. There was no evidence of a volcano-induced bloom in the plankton community.

  13. Petrological and geochemical Highlights in the floating fragments of the October 2011 submarine eruption offshore El Hierro (Canary Islands): Relevance of submarine hydrothermal processes

    NASA Astrophysics Data System (ADS)

    Rodriguez-Losada, Jose A.; Eff-Darwich, Antonio; Hernandez, Luis E.; Viñas, Ronaldo; Pérez, Nemesio; Hernandez, Pedro; Melián, Gladys; Martinez-Frías, Jesús; Romero-Ruiz, M. Carmen; Coello-Bravo, Juan Jesús

    2015-02-01

    This paper describes the main physical, petrological and geochemical features of the floating fragments that were emitted in the initial stages of the 2011-2012 submarine eruption off the coast of the Canarian island of El Hierro, located 380 km from the Northwest African Coast. It attempts to assess the potential of radiometric analyses to discern the intriguing origin of the floating fragments and the differences between their constituent parts. In this regard, the material that conforms the core of the fragments contains the largest concentration of uranium (U) ever found in volcanic rocks of the Canary Islands. This enrichment in U is not found in the content of thorium (Th), hence the floating fragments have an unusual U/Th ratio, namely equal to or larger than 3. Although the origin of this material is under discussion, it is proposed that the enrichment in U is the result of hydrothermal processes.

  14. The Submarine Volcano Eruption off El Hierro Island: Effects on the Scattering Migrant Biota and the Evolution of the Pelagic Communities

    PubMed Central

    Ariza, Alejandro; Kaartvedt, Stein; Røstad, Anders; Garijo, Juan Carlos; Arístegui, Javier; Fraile-Nuez, Eugenio; Hernández-León, Santiago

    2014-01-01

    The submarine volcano eruption off El Hierro Island (Canary Islands) on 10 October 2011 promoted dramatic perturbation of the water column leading to changes in the distribution of pelagic fauna. To study the response of the scattering biota, we combined acoustic data with hydrographic profiles and concurrent sea surface turbidity indexes from satellite imagery. We also monitored changes in the plankton and nekton communities through the eruptive and post-eruptive phases. Decrease of oxygen, acidification, rising temperature and deposition of chemicals in shallow waters resulted in a reduction of epipelagic stocks and a disruption of diel vertical migration (nocturnal ascent) of mesopelagic organisms. Furthermore, decreased light levels at depth caused by extinction in the volcanic plume resulted in a significant shallowing of the deep acoustic scattering layer. Once the eruption ceased, the distribution and abundances of the pelagic biota returned to baseline levels. There was no evidence of a volcano-induced bloom in the plankton community. PMID:25047077

  15. The 2011 volcanic crisis at El Hierro (Canary Islands): monitoring ground deformation through tiltmeter and gravimetric observations

    NASA Astrophysics Data System (ADS)

    Arnoso, J.; Montesinos, F. G.; Benavent, M.; Vélez, E. J.

    2012-04-01

    El Hierro is an ocean island located at the western end of the Canary Islands, and along with Tenerife and La Palma islands have been the most geologically active in the recent past. The island has a triple armed rift and, presently, is at the stage of growth, representing the summit of a volcanic shield elevating from the seafloor at depth of 4000 m up to 1501 m above the sea level (Münn et al., 2006; Carracedo et al., 1999). Since July 19th, 2011 seismic activity has produced more than 11950 events up to date. The seismic crisis resulted in a volcanic eruption that began on October 10th, being still currently active. The new volcano is located 2 km off the coast and about 300 m depth, in the submarine flank of the southern rift of the island, which is extended some 40 km length. Since September 2004 until November 2010 two continuous tilt stations were installed at the north, Balneario site (BA), and at the center of the island, Aula de la Naturaleza (AU) site. Both stations were used to assess the pattern of local ground movements in the island. When seismic swarm started on past July 2011, we have reinstalled both tilt stations (BA and AU) and 2 new ones located at the south of the island, namely Montaña Quemada (MQ) and Restinga (RE) sites. We have used short base platform tiltmeters that measure ground tilts with resolutions varying from 0.1 up to 0.01 microradians (µrad). On October 8th, a 4.4 magnitude earthquake took place and is supposed that fractured the ocean crust at some 8-10 km off the south coast of the island and about 1000 m depth. Typical spike signals were observed at the tilt stations. Two days after, the eruption onset was recorded also at tilt stations through a remarkable increase of the high frequency signal, being of large amplitude the components (radial) orientated towards the new volcano edifice. When compared with previous tiltmeter records in the island, tilt pattern were clearly modified several times at the stations when strong

  16. InSAR techniques for reliable deformation estimation in volcanic areas and a first glance of Tandem-DEM accuracy - test site El Hierro Island

    NASA Astrophysics Data System (ADS)

    Cong, X.; Eineder, M.; Fritz, T.

    2013-12-01

    The accuracy and availability of deformation measurements using InSAR techniques is limited due to decorrelation effects, atmospheric disturbances and the SAR side-looking geometry (layover and shadowing). In this talk, we present our recent research and achievements on advanced InSAR techniques in order to retrieve reliable deformation signals from active volcanoes using high resolution TerraSAR-X (TSX) images. Another highlight of this talk is the evaluation of an experimental TanDEM-X (TDX) RawDEM with a resolution of approximately 6 m in order to compensate the topographic phase. A volcanic test site which is currently highly active -El Hierro- has been selected to demonstrate the developed techniques: 1) PSI processing in volcanic areas using high resolution TSX images; 2) Mitigation of atmospheric delay distortions; 3) Fusion of multi-geometrical PSI clouds. In order to measure the deformation from 2011 to 2013 at El Hierro [1], two stacks of stripmap TSX Mission data have been acquired, one in ascending orbit and one in descending. Each stack has more than 25 scenes. More than 1.5 million PSs have been detected (SCR>3.0 dB). The stratified atmospheric delay for each acquisition has been integrated for the PSI reference network and, afterwards, interpolated and compensated for all PSs. A linear deformation model has been assumed for PSI processing. For the descending orbit stack, a relative deformation from -21.7 to 131.8 mm/y from Sep. 2011 to Jan. 2013 with respect to a reference point located on the northeast coast has been measured. On the one hand, the spatial variation of the deformation has a good agreement with the seismicity distribution [1]. On the other hand, the deformation magnitude agrees with in-situ GPS measurements [2]. In ascending orbit, the linear deformation rate varies from -22.8 to 90.9 mm/y. This different range of value is due to a scene acquired on Feb. 2010, which has been included in order to obtain the pre-seismic deformation

  17. Multi-level magmatic system of El Hierro Island (Canary Islands) constrained by multi-satellite radar interferometry measurements during the 2011-2012 eruption

    NASA Astrophysics Data System (ADS)

    Gonzalez, P. J.; Samsonov, S. V.; Pepe, S.; Tiampo, K. F.; Tizzani, P.; Fernandez, J.; Sansosti, E.

    2012-12-01

    Starting from July 2011, anomalous seismicity was observed at El Hierro Island (Canary Islands, Spain). During the following three months, seismic activity increased both in number of events and in magnitude, while expanding over a large area. In early October 2011 the process led to a submarine eruption, with some uncertainty about the location and timing of vent(s) opening. The site of the eruption was ~10 km from the initial and main earthquake loci, indicative of significant lateral migration. Here, we conduct a multi-frequency, multi-sensor interferometric analysis of space-borne radar images acquired using three different satellites (Radarsat-2, ASAR-ENVISAT and COSMO-SkyMed). Radar interferometry is used to measure the deformation that occurred from December 2009 to July 2012. InSAR data fully captures both the pre-, co- and post-eruptive phases. Subsequently, elastic modeling of the ground deformation is employed to constrain the dynamics associated with the magmatic and eruptive activity. This study represents one of the first geodetically-constrained active magmatic plumbing system model for any of the Canary Islands volcanoes, and one of the few examples of geodetic measurement of submarine volcanic activity to date. It reveals a complex magmatic system with multiple levels of stagnation, a deeper central system (~8.5 km depth) and a shallower magma reservoir at the flank of the southern rift (~4 km depth). Before eruption, magma propagated ~5 km downrift towards the eruption fissure. From mid-November 2011 to early January 2012 the system was continuously recharged from source(s) deeper than 10 km, which contributed to a relatively atypical long duration for a basaltic eruption (~5 months). The submarine eruption finished on early March 2012. However, on June 24, 2012 the seismic activity resumed and intense ground deformation has been recorded. The anomalous seismicity continued for a month depicting a clear, but different migration path with respect

  18. New Features in the Subsurface Structure Model of El Hierro Island (Canaries) from Low-Frequency Microseismic Sounding: An Insight into the 2011 Seismo-Volcanic Crisis

    NASA Astrophysics Data System (ADS)

    Gorbatikov, A. V.; Montesinos, F. G.; Arnoso, J.; Stepanova, M. Yu; Benavent, M.; Tsukanov, A. A.

    2013-07-01

    To study the deep structure of El Hierro Island, Canarian Archipelago, we have used a microseismic sounding method (MSM) based on the fact that heterogeneities of the Earth's crust disturb the spectrum of the low-frequency microseismic field in their vicinity. So, at the Earth's surface, the spectral amplitudes of definite frequency f above the high-velocity heterogeneities are decreasing, and above the low-velocity ones they are increasing. Moreover, the frequency f is connected with the depth of a heterogeneity H and the velocity of the fundamental mode of Rayleigh waves V R( f) through the relation H ≈ 0.4 V R( f)/ f. From these relations, the MSM lets us model the subsurface structure in a 3D context by inverting the amplitude-frequency spatial distribution of the microseismic field of low frequency. The validity of the method is shown through of numerical simulations and previous applications with known or verified solutions. This MSM is now used to invert the microseismic data registered in El Hierro Island. The obtained subsurface model reveals two large intrusive bodies beneath the island. Joint interpretation of microseismic and gravimetric data and their comparison with the available geological studies relate the central-eastern intrusive body to the early stage of the island formation. With respect to the western intrusive body, at the depths of 15-25 km, an area with lowest seismic velocities is identified, where we suggest that a modern magmatic reservoir is located. This reservoir could be associated with the recent submarine eruption in October 2011 and the accompanying seismic swarm, which started in July 2011. Several correlations between the shallowest structures identified by the gravity and MSM approaches are also found. Besides the numerical simulation and previous studies of this method, the correlation between gravity results, the MSM model, the geological information and the possible explanation of the features of the seismic swarm through

  19. [Lung transplantation in cystic fibrosis. The results of the Clínica Puerta de Hierro (Madrid) and the Hospital La Fe (Valencia)].

    PubMed

    Lázaro-Carrasco, M T; Morales, P; Ferreiro, M J; Borro, J M; Varela, A; Vicente, R; Ramos, F; Estada, J A

    1999-05-01

    Retrospective analysis of cystic fibrosis patients who underwent pulmonary transplantation at Clínica Puerta de Hierro, Madrid, and at Hospital La Fe, Valencia. Since the beginning of the programme and until March 1998, a total of 63 patients with cystic fibrosis were studied. Among transplanted patients, 18 were males and 16 females, with a mean age of 18.9 years. All patients underwent sequential bilateral pulmonary transplantation. After transplantation, the most common complication was bacterial pneumonia which affected all patients. Six patients had dehiscence or stenosis of the bronchial suture. Other specific complications of this condition by frequency were intestinal obstruction and diabetes mellitus. Six patients developed obliterans bronchiolitis and one of them underwent a repeat transplantation. Three out of the 34 patients died, and the likelihood of survival after one and three years was 94%. Respiratory function tests and PaO2 peaked at sixth post-transplantation month. Pulmonary transplantation is a therapeutic option to be considered for the patient with cystic fibrosis and severe involvement of his/her pulmonary disease.

  20. Applying fractal dimensions and energy-budget analysis to characterize fracturing processes during magma migration and eruption: 2011-2012 El Hierro (Canary Islands) submarine eruption

    NASA Astrophysics Data System (ADS)

    López, Carmen; Martí, Joan; Abella, Rafael; Tarraga, Marta

    2014-05-01

    The impossibility of observing magma migration inside the crust obliges us to rely on geophysical data and mathematical modelling to interpret precursors and to forecast volcanic eruptions. Of the geophysical signals that may be recorded before and during an eruption, deformation and seismicity are two of the most relevant as they are directly related to its dynamic. The final phase of the unrest episode that preceded the 2011-2012 eruption on El Hierro (Canary Islands) was characterized by local and accelerated deformation and seismic energy release indicating an increasing fracturing and a migration of the magma. Application of time varying fractal analysis to the seismic data and the characterization of the seismicity pattern and the strain and the stress rates allow us to identify different stages in the source mechanism and to infer the geometry of the path used by the magma and associated fluids to reach the Earth's surface. The results obtained illustrate the relevance of such studies to understanding volcanic unrest and the causes that govern the initiation of volcanic eruptions.

  1. Applying Fractal Dimensions and Energy-Budget Analysis to Characterize Fracturing Processes During Magma Migration and Eruption: 2011-2012 El Hierro (Canary Islands) Submarine Eruption

    NASA Astrophysics Data System (ADS)

    López, Carmen; Martí, Joan; Abella, Rafael; Tarraga, Marta

    2014-07-01

    The impossibility of observing magma migration inside the crust obliges us to rely on geophysical data and mathematical modelling to interpret precursors and to forecast volcanic eruptions. Of the geophysical signals that may be recorded before and during an eruption, deformation and seismicity are two of the most relevant as they are directly related to its dynamic. The final phase of the unrest episode that preceded the 2011-2012 eruption on El Hierro (Canary Islands) was characterized by local and accelerated deformation and seismic energy release indicating an increasing fracturing and a migration of the magma. Application of time varying fractal analysis to the seismic data and the characterization of the seismicity pattern and the strain and the stress rates allow us to identify different stages in the source mechanism and to infer the geometry of the path used by the magma and associated fluids to reach the Earth's surface. The results obtained illustrate the relevance of such studies to understanding volcanic unrest and the causes that govern the initiation of volcanic eruptions.

  2. Probabilistic approach to decision making under uncertainty during volcanic crises. Retrospective analysis of the 2011 eruption of El Hierro, in the Canary Islands

    NASA Astrophysics Data System (ADS)

    Sobradelo, Rosa; Martí, Joan; Kilburn, Christopher; López, Carmen

    2014-05-01

    Understanding the potential evolution of a volcanic crisis is crucial to improving the design of effective mitigation strategies. This is especially the case for volcanoes close to densely-populated regions, where inappropriate decisions may trigger widespread loss of life, economic disruption and public distress. An outstanding goal for improving the management of volcanic crises, therefore, is to develop objective, real-time methodologies for evaluating how an emergency will develop and how scientists communicate with decision makers. Here we present a new model BADEMO (Bayesian Decision Model) that applies a general and flexible, probabilistic approach to managing volcanic crises. The model combines the hazard and risk factors that decision makers need for a holistic analysis of a volcanic crisis. These factors include eruption scenarios and their probabilities of occurrence, the vulnerability of populations and their activities, and the costs of false alarms and failed forecasts. The model can be implemented before an emergency, to identify actions for reducing the vulnerability of a district; during an emergency, to identify the optimum mitigating actions and how these may change as new information is obtained; and after an emergency, to assess the effectiveness of a mitigating response and, from the results, to improve strategies before another crisis occurs. As illustrated by a retrospective analysis of the 2011 eruption of El Hierro, in the Canary Islands, BADEMO provides the basis for quantifying the uncertainty associated with each recommended action as an emergency evolves, and serves as a mechanism for improving communications between scientists and decision makers.

  3. On the biology of Spiruroidea parasites of murine rodents on El Hierro (Canary Islands, Spain) with molecular characterization of Streptopharagus greenbergi Wertheim, 1993.

    PubMed

    Montoliu, Isabel; Sánchez, Santiago; Villa, Mercedes; Abreu-Acosta, Néstor; Martín-Alonso, Aarón; Fernández-Álvarez, Ángela; Foronda, Pilar

    2013-09-01

    This paper reports the role of darkling beetles Pimelia laevigata costipennis and Hegeter amaroides (Tenebrionidae) as intermediate hosts of spiruroid nematodes parasites of the black rat and house mouse of El Hierro (Canary Islands). Larvae of spiruroid species were found in the two tenebrionids (18.1% in P. l. costipennis, 7.8% in H. amaroides), Streptopharagus greenbergi being predominant in both (16.1% and 7.1%, respectively), ahead of Mastophorus muris and Gongylonema type larva. The larval stages of S. greenbergi are described for the first time, and adult worms were obtained experimentally from an infected laboratory rat, allowing the identification of the species. Morphometric measurements of experimental adults match those of adults detected in naturally infected rats on the island. Molecular data for S. greenbergi, and the ITS nucleotide sequence of the genus Streptopharagus are also provided for the first time. After the isolation of S. greenbergi DNA and amplification of the ITS region, the ITS1 of this spirocercid was sequenced and deposited in the GenBank database.

  4. Problemas de nervos: a multivocal symbol of distress for Portuguese immigrants.

    PubMed

    James, Susan; Fernandes, Mark; Navara, Geoffrey S; Harris, Sara; Foster, Durwin

    2009-06-01

    This article outlines research on a previous unstudied form of suffering specific to the Portugese immigrant community: problemas de nervos. Thirty-two Portuguese immigrant women (in Waterloo, ON and Boston, MA) were interviewed and each completed a questionnaire. Cluster analysis demonstrated that problemas de nervos has many meanings. The study profiled symptoms, causes and therapies associated with four variations of this culture-specific form of distress: "mal da cabeca" meaning problems with/in the head (e.g., lack of control, visions); " aflição" meaning affliction (e.g., nervous attacks, heart problems); immigration stress (causing sleep disturbances); and, conflicts with others (resulting in pressure within the body). None of the symptom clusters reported matched criteria for a DSM-IV-TR diagnosis, suggesting that problemas de nervos represents an idiomatic rather than universal expression of distress.

  5. Como Lo Hago Yo: Myelomeningocele

    PubMed Central

    Lazareff, Jorge

    2014-01-01

    Fortificación con ádico fólico es efectiva, pero aún falta conciencia en los jóvenes. La legalidad del aborto aumenta la importancia de la consulta prenatal. Realizo la cirugía bajo microcoscopio por razones didácticas. Irrigación continua para reducir la temperatura del tejido. Trato a la plaqueta como tejido viable. No suturo la plaqueta. No cierro músculo. ATB por una semana después de cirugía. Hidrocefalia: Válvula en todos los casos de ventriculomegalia. Médula anclada: Desanclar una sola vez. Chiari II: Revisar la válvula. Incluir en el seguimiento rendimiento escolar, puede indicar obstrucción de la válvula o médula anclada. PMID:24791217

  6. Hydrogeochemical variations in groundwater periodically sampled at El Hierro (Canary Islands) and its relationships with the recent eruptive and unrest periods

    NASA Astrophysics Data System (ADS)

    Luengo-Oroz, Natividad; Torres, Pedro A.; Moure, David; D'Alessandro, Walter

    2014-05-01

    On 10 October 2011, a submarine volcanic eruption started 2 km south El Hierro Island (Canary Islands, Spain). Since July 2011 a dense multiparametric monitoring network was deployed all over the island by Instituto Geográfico Nacional (IGN). By the time the eruption started, almost 10000 earthquakes had been located and the deformation analyses showed a maximum deformation of more than 5 cm. After the end of the submarine eruption and up to now, several volcanic unrest processes have taken place in the island. The most relevant ones started on June 2012 and March 2013. Each of these periods has been evidenced by intense seismicity and ground deformation. In the framework of this volcanic surveillance program, the IGN team started to periodically sample five groundwater sampling sites. Some parameters have been determined directly in the field (temperature, pH, electric conductivity and alkalinity) and collected samples have been analysed in the laboratory for major (Na, K, NH4, Ca, Mg, SO4, Cl, HCO3, CO3, NO3, NO2, PO4, SiO2, Br, F) and trace elements (Be, Al, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Se, Mo, Ag, Cd, Ba, Hg, Tl, Pb, Th, U) contents. In a few cases samples for the chemical analysis of dissolved gases and for the determination of the isotopic composition of He have been collected at two of the sites. Significant increases in alkalinity have been recorded in all sampling sites correlated both to the eruptive period and also to the following unrest episodes. Such increases are probably related to the dissolution of magmatic CO2 exsolved from the rising magma batches. The magmatic contribution can be confirmed by the isotopic composition of dissolved He showing values in the range from 7.76 to 8.91 R/Ra. Since July 2011, only one important CO2 soil degassing anomaly has been detected. This anomalous flux (620 g/m2.d) was measured in a small area (0.36 km2) before the beginning of the submarine eruption and has not been detected again after the eruption onset

  7. Evolution of submarine eruptive activity during the 2011-2012 El Hierro event as documented by hydroacoustic images and remotely operated vehicle observations

    NASA Astrophysics Data System (ADS)

    Somoza, L.; González, F. J.; Barker, S. J.; Madureira, P.; Medialdea, T.; de Ignacio, C.; Lourenço, N.; León, R.; Vázquez, J. T.; Palomino, D.

    2017-08-01

    Submarine volcanic eruptions are frequent and important events, yet they are rarely observed. Here we relate bathymetric and hydroacoustic images from the 2011 to 2012 El Hierro eruption with surface observations and deposits imaged and sampled by ROV. As a result of the shallow submarine eruption, a new volcano named Tagoro grew from 375 to 89 m depth. The eruption consisted of two main phases of edifice construction intercalated with collapse events. Hydroacoustic images show that the eruptions ranged from explosive to effusive with variable plume types and resulting deposits, even over short time intervals. At the base of the edifice, ROV observations show large accumulations of lava balloons changing in size and type downslope, coinciding with the area where floating lava balloon fallout was observed. Peaks in eruption intensity during explosive phases generated vigorous bubbling at the surface, extensive ash, vesicular lapilli and formed high-density currents, which together with periods of edifice gravitational collapse, produced extensive deep volcaniclastic aprons. Secondary cones developed in the last stages and show evidence for effusive activity with lava ponds and lava flows that cover deposits of stacked lava balloons. Chaotic masses of heterometric boulders around the summit of the principal cone are related to progressive sealing of the vent with decreasing or variable magma supply. Hornitos represent the final eruptive activity with hydrothermal alteration and bacterial mats at the summit. Our study documents the distinct evolution of a submarine volcano and highlights the range of deposit types that may form and be rapidly destroyed in such eruptions.Plain Language SummaryToday and through most of geological history, the greatest number and volume of volcanic eruptions on Earth have occurred underwater. However, in comparison to subaerial eruption, little is known about submarine eruptive processes as</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2013JGRB..118.4361G','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2013JGRB..118.4361G"><span>Magma storage and migration associated with the 2011-2012 El <span class="hlt">Hierro</span> eruption: Implications for crustal magmatic systems at oceanic island volcanoes</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>González, Pablo J.; Samsonov, Sergey V.; Pepe, Susi; Tiampo, Kristy F.; Tizzani, Pietro; Casu, Francesco; Fernández, José; Camacho, Antonio G.; Sansosti, Eugenio</p> <p>2013-08-01</p> <p>Starting in July 2011, anomalous seismicity was observed at El <span class="hlt">Hierro</span> Island, a young oceanic island volcano. On 12 October 2011, the process led to the beginning of a submarine NW-SE fissural eruption at ~15 km from the initial earthquake loci, indicative of significant lateral magma migration. Here we conduct a multifrequency, multisensor interferometric analysis of spaceborne radar images acquired using three different satellite systems (RADARSAT-2, ENVISAT, and COSMO-SkyMed (Constellation of Small Satellites for Mediterranean Basin Observation)). The data fully captures both the pre-eruptive and coeruptive phases. Elastic modeling of the ground deformation is employed to constrain the dynamics associated with the magmatic activity. This study represents the first geodetically constrained active magmatic plumbing system model for any of the Canary Islands volcanoes, and one of the few examples of submarine volcanic activity to date. Geodetic results reveal two spatially distinct shallow (crustal) magma reservoirs, a deeper central source (9.5 ± 4.0 km), and a shallower magma reservoir at the flank of the southern rift (4.5 ± 2.0 km). The deeper source was recharged, explaining the relatively long basaltic eruption, contributing to the observed island-wide uplift processes, and validating proposed active magma underplating. The shallowest source may be an incipient reservoir that facilitates fractional crystallization as observed at other Canary Islands. Data from this eruption supports a relationship between the depth of the shallow crustal magmatic systems and the long-term magma supply rate and oceanic lithospheric age. Such a relationship implies that a factor controlling the existence/depth of shallow (crustal) magmatic systems in oceanic island volcanoes is the lithosphere thermomechanical behavior.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/EJ275018.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/EJ275018.pdf"><span>"Mastery Learning" <span class="hlt">Como</span> Metodo Psicoeducativo para Ninos con <span class="hlt">Problemas</span> Especificos de Aprendizaje. ("Mastery Learning" as a Psychoeducational Method for Children with Specific Learning Problems.)</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Coya, Liliam de Barbosa; Perez-Coffie, Jorge</p> <p>1982-01-01</p> <p>"Mastery Learning" was compared with the "conventional" method of teaching reading skills to Puerto Rican children with specific learning disabilities. The "Mastery Learning" group showed significant gains in the cognitive and affective domains. Results suggested Mastery Learning is a more effective method of teaching…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=aprendizaje&pg=7&id=EJ275018','ERIC'); return false;" href="https://eric.ed.gov/?q=aprendizaje&pg=7&id=EJ275018"><span>"Mastery Learning" <span class="hlt">Como</span> Metodo Psicoeducativo para Ninos con <span class="hlt">Problemas</span> Especificos de Aprendizaje. ("Mastery Learning" as a Psychoeducational Method for Children with Specific Learning Problems.)</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Coya, Liliam de Barbosa; Perez-Coffie, Jorge</p> <p>1982-01-01</p> <p>"Mastery Learning" was compared with the "conventional" method of teaching reading skills to Puerto Rican children with specific learning disabilities. The "Mastery Learning" group showed significant gains in the cognitive and affective domains. Results suggested Mastery Learning is a more effective method of teaching…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014EGUGA..1615418M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014EGUGA..1615418M"><span>A new approach to the unrest and subsequent eruption at El <span class="hlt">Hierro</span> Island (2011) based on petrological, seismological, geodetical and gravimetric data</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Meletlidis, Stavros; Di Roberto, Alessio; Domínguez Cerdeña, Itahiza; Pompilio, Massimo; García-Cañada, Laura; Bertagnini, Antonella; Benito Saz, Maria Angeles; Del Carlo, Paola; Sainz-Maza Aparicio, Sergio; Lopez Moreno, Carmen; Moure García, David</p> <p>2014-05-01</p> <p>A shallow submarine eruption took place on 10th October 2011, about 1.8 km off the coast of La Restinga, a small village located in El <span class="hlt">Hierro</span> (Canary Islands, Spain). The eruption lasted for about four months and ended by early March 2012. The eruption was preceded by an unrest episode that initiated about three months before, in July 2011, and characterized by more than 10,000 localized earthquakes accompanied by up to 5 cm of vertical ground deformation. In the Canary Islands, this event represents the first case of an eruption that was monitored since the unrest to the end by the monitoring network of IGN (Instituto Geográfico National), providing a huge dataset that includes geophysical (seismic, magnetic and gravimetric), geodetic, geochemistry and petrological data. In this work we use the seismic, GPS and gravity records collected by IGN along with the petrological data derived from the study of various lava balloons, scoriaceous fragments and ash.Geophysical and geochemical monitoring tools provide a variety of information that need to be interpreted in terms of magma movement and/or interaction of magma with host rocks. We present a model, based on this data, which describes the intrusion and ascent of the magma. According to this model, a major intrusion beneath and around preexisting high-density magmatic bodies, localized in the central sector of the island, led to an eruption in the Southern sector of the island. After a failed attempt to reach the surface, while various dykes were emplaced, through a low fractured area in the Central and Northern parts of the island, the ascending magma finally found its way in the submarine area of La Restinga, in the South rift zone, at a depth of 350 m below sea level. Feeding of the eruption was achieved by the ascension of an important volume of material from the upper mantle which was emplaced near the crust-mantle boundary. However, the very energetic post-eruptive unrests - we had five episodes up today with</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1986SPIE..655...15V','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1986SPIE..655...15V"><span><span class="hlt">COMO</span> - A Program For Optical Design</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Vollrath, Wolfgang</p> <p>1986-10-01</p> <p><span class="hlt">COMO</span> is an optical design program of a special orthogonalization type, developed by Prof. H.Marx at Ernst Leitz Wetzlar Company. Not using a merit function, <span class="hlt">COMO</span> corrects aberrations under equality and inequality constraints not simultaneously but sequentially, the order is chosen by the optical designer. The optimization procedure shows distinctive features compared to other programs. <span class="hlt">COMO</span> is in use at Leitz since the early 1970's and is now running on HP-1000F and HP-A900 computer systems. In 1974, when it was implemented on a HP-2100, it was probably one of the very first "mainfrawe" optical design programs running on a minicomputer. H.Marx named this program <span class="hlt">COMO</span>.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2004AGUFM.P43A0904J','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2004AGUFM.P43A0904J"><span>Fast-Turnoff Transient Electro-Magnetic (TEM) geophysical survey in the Peña de <span class="hlt">Hierro</span> ("Berg of Iron") field area of the Mars Analog Research and Technology Experiment (MARTE)</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Jernsletten, J. A.</p> <p>2004-12-01</p> <p>This report describes the outcome of a Fast-Turnoff Transient Electro-Magnetic (TEM) geophysical survey carried out in the Peña de <span class="hlt">Hierro</span> ("Berg of Iron") field area of the Mars Analog Research and Technology Experiment (MARTE), during May and June of 2003. The MARTE Peña de <span class="hlt">Hierro</span> field area is located between the towns of Rio Tinto and Nerva in the Andalucia region of Spain. It is about one hour drive West of the city of Sevilla, and also about one hour drive North of Huelva. The high concentration of dissolved iron (and smaller amounts of other metals) in the very acidic water in the Rio Tinto area gives the water its characteristic wine red color, and also means that the water is highly conductive, and such an acidic and conductive fluid is highly suited for exploration by electromagnetic methods. This naturally acidic environment is maintained by bacteria in the groundwater and it is these bacteria that are the main focus of the MARTE project overall, and of this supporting geophysical work. It is the goal of this study to be able to map the subsurface extent of the high conductivity (low resistivity) levels, and thus by proxy the subsurface extent of the acidic groundwater and the bacteria populations. In so doing, the viability of using electromagnetic methods for mapping these subsurface metal-rich water bodies is also examined and demonstrated, and the geophysical data will serve to support drilling efforts. The purpose of this field survey was an initial effort to map certain conductive features in the field area, in support of the drilling operations that are central to the MARTE project. These conductive features include the primary target of exploration for MARTE, the very conductive acidic groundwater in the area (which is extremely rich in metals). Other conductive features include the pyretic ore bodies in the area, as well as extensive mine tailings piles.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1989Optik..81..146M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1989Optik..81..146M"><span>Rechenverfahren des optischen Korrektionsprogrammms "<span class="hlt">COMO</span>". Teil 1.</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Marx, H.</p> <p>1989-03-01</p> <p><span class="hlt">COMO</span> is a program of an orthogonalization type that was developed in order to achieve that each elementary correction step makes immediate use of the shortest possible step in the system data space even if many rigid boundary conditions are to be taken into account (optimization under constraints). <span class="hlt">COMO</span> usually does not correct aberrations simultaneously (by minimization), but one after the other. The order is given by the optical designer. For each aberration (paraxial data included) one can either specify a target value or a bandwidth between a lower and an upper limit.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3987255','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3987255"><span><span class="hlt">Como</span> Lo Hago Yo: Lipomas Medulares</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Portillo, Santiago</p> <p>2014-01-01</p> <p>Basados en la experiencia de 82 casos; en 5% se observaron anomalías pélvicas asociadas. En los menores de 3 años el motivo de consulta (85%) fue la tumoración. En los mayores de 3 años (42%) tenía <span class="hlt">problemas</span> neurológicos. Solo el 24% preocupados por la tumoración. El objetivo de la cirugía es desanclar la médula y no remover la totalidad del lipoma. El lipoma de filum es el que es mas simple para operar. Aún cuando la escuela francesa propone operar solamente cuando hay síntomas favorezco cirugía preventiva. Favorezco una segunda cirugía si hay signos de anclaje postoperatorio, aún cuando observamos empeoramiento postoperatorio motor en 2.5% de los operados y urológico a largo plazo en 6% de los operados. PMID:24791218</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28991281','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28991281"><span>Trombosis venosa esplácnica <span class="hlt">como</span> manifestación inicial de mielofibrosis primaria.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Campos-Cabrera, Gregorio; Campos-Cabrera, Virginia; Campos-Cabrera, Salvador; Campos-Villagómez, José-Luis; Romero-González, Alejandra</p> <p>2017-01-01</p> <p>Las neoplasias mieloproliferativas (NMP) son alteraciones crónicas de las células madre hematopoyéticas clonales caracterizadas por una mayor producción de granulocitos, glóbulos rojos o plaquetas. Una de las principales complicaciones de las NMP es la aparición de <span class="hlt">problemas</span> trombóticos venosos y arteriales causados por un aumento en la agregación plaquetaria y la generación de trombina. Se evaluaron 11 casos de mielofibrosis primaria (MP), de los cuales dos debutaron con trombosis venosa esplácnica (TVE). Tras observar los resultados de este estudio y de la literatura mundial, se sugiere que al evaluar pacientes con TVE se incluyan métodos diagnósticos para MP, <span class="hlt">como</span> la mutación JAK2V617F. Myeloproliferative neoplasms are chronic disorders of clonal hematopoietic stem cells, characterized by an overproduction of functional granulocytes, red blood cells and / or platelets, and one of the major complications is the occurrence of venous and arterial thrombotic problems caused by increased platelet aggregation and thrombin generation. In this study 11 cases of primary myelofibrosis (PM) were evaluated and 2 debuted with splanchnic venous thrombosis (SVT); so after seeing the results of this study and of world literature, it is suggested that in patients with SVT, diagnostic methods for PM like the JAK2V617F mutation should be included.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1998larm.confE..52C','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1998larm.confE..52C"><span>Soluciones analiticas AL <span class="hlt">problema</span> de jets con velocidad de eyeccion variable EN EL tiempo.</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Canto, J.; Raga, A. C.; D'Alessio, P.</p> <p>1998-11-01</p> <p>Se presenta un nuevo metodo que permite resolver de manera exacta y analitica las ecuaciones que describen un jet hipersonico con velocidad de eyeccion variable en el tiempo. El metodo se basa en consideraciones sencillas de conservacion de momento para las superficies de trabajo que se forman en el interior del jet. <span class="hlt">Como</span> ejemplo, se presentan soluciones para jets con variacion sinusoidal en la velocidad de eyeccion, y tambien para el caso de un incremento lineal en el tiempo. Estas soluciones analiticas tienen una clara aplicacion en la interpretacion de las observaciones de jets asociados a objetos Herbig-Haro.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3987296','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3987296"><span><span class="hlt">Como</span> Lo Hago Yo: Mielomeningocele En Bolivia</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Dabdoub, Carlos F.; Dabdoub, Carlos B.; Villavicencio, Ramiro; Quevedo, Germán</p> <p>2014-01-01</p> <p>Introducción: Las malformaciones del tubo neural (MTN) representan la segunda causa más frecuente de anomalías congénitas, luego de las cardiopatías. En este grupo se destaca el mielomeningocele (MMC) por su mayor incidencia, y por ser la más incapacitante y la más compleja entre todas las demás malformaciones del sistema nervioso c`entral (SNC). En Bolivia, <span class="hlt">como</span> en muchos países de Sudamérica, los bajos niveles socio-culturales y la debilidad en el sistema sanitario, hacen que su incidencia y su morbilidad, sean mayores que en las naciones más desarrolladas. Material y Métodos: Se realizó un estudio retrospectivo y descriptivo de 70 casos de MMC, atendidos por un equipo multidisciplinario en el Hospital Universitario Japonés (HUJ) de Santa Cruz de la Sierra, entre 2008-2011. De ellos, 60 fueron intervenidos quirúrgicamente. Resultados: Se realizaron controles prenatales sólo en 27 mujeres (38.6%), diagnosticándose una disrafia espinal en apenas dos casos (7.4%). La edad de ingreso del MMC en su mayoría fue después de las 24 horas (65.6%), predominando su localización en la región lumbosacra (64.3%). De ellos, 67.2% eran abiertos, presentando un 32.9% un daño neurológico motor parcial mientras que 47.1% tenían paraplejia por debajo de la lesión. De los 70 casos, tres (4.3%) no fueron intervenidos, por presentar defectos congénitos severos o estado general grave. Las principales complicaciones posoperatorias inmediatas fueron: dehiscencia de sutura y/o infección de la herida (16.6%), fístula de líquido cefalorraquídeo (LCR) (10%) e infección del SNC (11.7%). La mortalidad general y postoperatoria fue de 7.1% y 3.3%, respectivamente. Al mes de vida presentaban hidrocefalia un 80% de los pacientes operados, colocándose una derivación ventriculoperitoneal (DVP) de presión media. De 9 pacientes que tuvieron un acompanamiento de dos o más años, seis presentaron una médula anclada, que fueron intervenidas quirúrgicamente. Conclusi</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.dtic.mil/docs/citations/ADA548909','DTIC-ST'); return false;" href="http://www.dtic.mil/docs/citations/ADA548909"><span>Nontrivial Solutions to the Cubic Sieve Congruence Problem: x3 is congruent to y2z mod p: Soluciones no Triviales al <span class="hlt">problema</span> de Congruencia de Criba Cubica: x3 is congruent to y2z mod p</span></a></p> <p><a target="_blank" href="http://www.dtic.mil/">DTIC Science & Technology</a></p> <p></p> <p>2009-01-01</p> <p>x3 6= y2z. Las soluciones a este <span class="hlt">problema</span> resultan útiles para resolver el <span class="hlt">problema</span> del logaritmo discreto o el de factorización entera cuando se...<span class="hlt">problema</span> puede ser resuelto en tiempo polinomial en log p. Asimismo, extendimos la idea de cribado de Reyneri e identificamos algunas clases en donde el...<span class="hlt">problema</span> puede ser resuelto en tiempo constante. Los diseñadores de cripto-esquemas deben evitar utilizar cualquiera de los primos contenidos en los</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.fs.usda.gov/treesearch/pubs/13947','TREESEARCH'); return false;" href="https://www.fs.usda.gov/treesearch/pubs/13947"><span><span class="hlt">Como</span> Podar Arboles (Spanish Version), How to Prune Trees</span></a></p> <p><a target="_blank" href="http://www.fs.usda.gov/treesearch/">Treesearch</a></p> <p>Maureen McDonough; Russell; Lisa Burban; Lee Nancarrow; United States Department of Agriculture, Forest Service, Northeastern Area, State and Private Forestry</p> <p>2004-01-01</p> <p>Introduccion, El proposito de la poda es tener plantas fuertes, sanas y atractivas. Esta meta se puede alcanzar sabiendo <span class="hlt">como</span>, cuando y por que podar, y siguiendo unos cuantos principios muy sencillos.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_5");'>5</a></li> <li><a href="#" onclick='return showDiv("page_6");'>6</a></li> <li class="active"><span>7</span></li> <li><a href="#" onclick='return showDiv("page_8");'>8</a></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_7 --> <div id="page_8" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_6");'>6</a></li> <li><a href="#" onclick='return showDiv("page_7");'>7</a></li> <li class="active"><span>8</span></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="141"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2012EGUGA..1412345B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2012EGUGA..1412345B"><span>Estimated CO2, SO2 and H2S emission to the atmosphere from the 2011 El <span class="hlt">Hierro</span> submarine eruption (Canary Islands) on the basis of helicopter gas surveys</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Barrancos, J.; Padilla, G.; Padrón, E.; Hernández, P. A.; Calvo, D.; Marquez, A.; Pérez, N. M.; Melian, G.; Dionis, S.; Rodríguez, F.; Nolasco, D.; Hernández, I.</p> <p>2012-04-01</p> <p>An accurate estimation of SO2 emission rates is an important issue to elucidate the activity of volcanoes, moreover the monitoring of its temporal evolution might help to predict a possible eruption and thus, save the loss of human's lives in cities nearby volcanoes. In the lasts years new instruments have been developed and improved, in order to be more portable, cheaper and lighter. The miniDOAS consist of a small spectrometer with a lens for collecting scattered UV light, and are controlled/powered via USB with a laptop. Recently, new technical developments have allowed monitoring the emission of other gas species such as CO2, H2S, etc from volcanic plumes by means of portable multisensor system. With both devices we were able to evaluate the SO2 emission rates and the molar ratios of major volcanic gas components, respectively. Multiplying the observed SO2 emission rate times the observed (gas)i/SO2 mass ratios (CO2/SO2 and H2S/SO2) allowed us to estimate other volatiles emission rates. Between November 11, 2011, and January 16, 2012, and as a consequence of the submarine volcanic eruption started on October 10, 2011, south off shore El <span class="hlt">Hierro</span>, Canary Islands, a regularly monitoring of the volcanic plume from the submarine volcano has been performed with remote sensors, always depending of helicopter availability. The instruments are mounted aboard on a helicopter belonged to the Helicopter Unit of Spanish Civil Guard. The SO2 flux measured during this period showed a maximum SO2 emission of 109 ± 19 t/d on November 6, just two days before the occurrence of a intense bubbling at the sea surface on November 8, producing a water, gas and ash column of about 15 meters over the sea surface. That day, CO2 and H2S emission also reached the maximum measured, with 5400 t/d and 3.6 t/d, respectively. Since then, SO2, CO2 and H2S emission rates have declined to values close to detection limit (~ 2 t/d for SO2). These results report the first SO2 emission rates measured</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3557520','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3557520"><span>DIABETES MELLITUS <span class="hlt">COMO</span> FACTOR DE RIESGO DE DEMENCIA EN LA POBLACIÓN ADULTA MAYOR MEXICANA</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Silvia, Mejía-Arango; Clemente, y Zúñiga-Gil</p> <p>2012-01-01</p> <p>Introduccion La diabetes mellitus y las demencias constituyen dos <span class="hlt">problemas</span> crecientes de salud entre la población adulta mayor del mundo y en particular de los paises en desarrollo. Hacen falta estudios longitudinales sobre el papel de la diabetes <span class="hlt">como</span> factor de riesgo para demencia. Objetivo Determinar el riesgo de demencia en sujetos Mexicanos con diabetes mellitus tipo 2. Materiales y Metodos Los sujetos diabéticos libres de demencia pertenecientes al Estudio Nacional de Salud y Envejecimiento en México fueron evaluados a los dos años de la línea de base. Se estudió el papel de los factores sociodemográficos, de otras comorbilidades y del tipo de tratamiento en la conversión a demencia. Resultados Durante la línea de base 749 sujetos (13.8%) tuvieron diabetes. El riesgo de desarrollar demencia en estos individuos fue el doble (RR, 2.08 IC 95%, 1.59–2.73). Se encontró un riesgo mayor en individuos de 80 años y más (RR 2.44 IC 95%, 1.46–4.08), en los hombres (RR, 2.25 IC 95%, 1.46–3.49) y en sujetos con nivel educativo menor de 7 años. El estar bajo tratamiento con insulina incrementó el riesgo de demencia (RR, 2.83, IC 95%, 1.58–5.06). Las otras comorbilidades que aumentaron el riesgo de demencia en los pacientes diabéticos fueron la hipertensión (RR, 2.75, IC 95%, 1.86–4.06) y la depresión (RR, 3.78, 95% IC 2.37–6.04). Conclusión Los sujetos con diabetes mellitus tienen un riesgo mayor de desarrollar demencia, La baja escolaridad y otras comorbilidades altamente prevalentes en la población Mexicana contribuyen a la asociación diabetes-demencia. PMID:21948010</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2867611','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2867611"><span>LA BIOÉTICA <span class="hlt">COMO</span> QUEHACER FILOSÓFICO</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Ferrer, Jorge José</p> <p>2009-01-01</p> <p>El artículo examina el estatuto epistemológico de la bioética <span class="hlt">como</span> disciplina académica. El autor sostiene que el estatuto epistemológico de un discurso lo determina la pregunta fundamental que se plantea y la respuesta que se busca, focos integradores del discurso. En el caso de la bioética, la pregunta fundamental es de índole moral. La bioética es pues una disciplina ética que tiene su hogar epistemológico en la filosofía. El autor también defiende el concepto de “éticas aplicadas”. Sugiere finalmente que el método de la bioética, sobre todo la que se hace desde nuestras latitudes, debería adoptar el círculo hermenéutico <span class="hlt">como</span> metodología para su filosofar. PMID:20463860</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.fs.usda.gov/treesearch/pubs/52216','TREESEARCH'); return false;" href="https://www.fs.usda.gov/treesearch/pubs/52216"><span>Memorias del tercer simposio internacional sobre economía, planificación, y políticas de los incendios forestales: <span class="hlt">problemas</span> y enfoques comunes</span></a></p> <p><a target="_blank" href="http://www.fs.usda.gov/treesearch/">Treesearch</a></p> <p>Armando González-Cabán</p> <p>2009-01-01</p> <p>Estas memorias resumen el resultado de un simposio diseñado para discutir los <span class="hlt">problemas</span> actuales que confrontan las agencias con responsabilidad para la proteccion contra incendios forestales a nivel federal y estadual en los EE.UU., al igual que agencias en la comunidad internacional. Los temas discutidos en el simposio incluyen economía del fuego, teoría y modelos...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1995GAst...21a...2D','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1995GAst...21a...2D"><span>Il <span class="hlt">problema</span> del litio.</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>D'Antona, F.</p> <p>1995-03-01</p> <p>Contents: 1. Introduzione. 2. La nucleosintesi del Big Bang. 3. Il litio nelle stelle di popolazione II. 4. I modelli stellari standard. 5. Il litio negli ammassi aperti. 6. Meccanismi di distruzione "non standard". 7. I modelli non-standard applicati alla popolazione II. 8. L'evoluzione Galattica del litio. 9. Quali stelle producono litio? 10. Il litio come elemento chiave per dare un nome agli oggetti stellari più minuscoli. 11. Conclusioni.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014AGUFM.H51D0643B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014AGUFM.H51D0643B"><span>Sensitivity of Hydrologic Partitioning to Snowpack Dynamics, <span class="hlt">Como</span> Creek, CO</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Barnhart, T. B.; Molotch, N. P.; Harpold, A. A.; Knowles, J. F.; Anderson, S. P.</p> <p>2014-12-01</p> <p>Snowmelt is the primary source of surface water in the western United States and many other regions on Earth. Climate warming is forecast to impact the amount of precipitation that falls as snow and forms the mountain snowpack. Climate change induced alterations to snowpack translate to changes in snowpack magnitude, the timing of snowmelt, and changes in snowmelt rate. We ask how these perturbations may impact how snowmelt is partitioned between evapotranspiration (ET) and runoff (R) at <span class="hlt">Como</span> Creek, a snowmelt dominated catchment on the Colorado Front Range. <span class="hlt">Como</span> Creek is a 4.5 km2 headwater catchment spanning 2900-3560 m and is part of the Niwot Ridge Long Term Ecological Research Station and the Boulder Creek Critical Zone Observatory. We use observations of snow water equivalent (SWE), ET, and precipitation (P) from Niwot Ridge, CO, and discharge from <span class="hlt">Como</span> Creek to explore relationships between snowpack dynamics and snowmelt partitioning. Measurements of ET are collected adjacent to <span class="hlt">Como</span> Creek at the Niwot Ridge Ameriflux site and are assumed representative of the hydrologic fluxes in <span class="hlt">Como</span> Creek. Analyses from point data show that years with higher peak SWE/P ratios partition proportionally more snowmelt to ET (pValue: 0.045). For example, water year (WY) 2005 has a peak SWE/P ratio of 0.49 and a growing season ET normalized by WY precipitation (ET/P) ratio of 0.48 while WY 2008 has a peak SWE/P ratio of 0.83 and an ET/P ratio of 0.82. Observations also show that years that experience later peak SWE (DOY=142) partition proportionally less snowmelt into ET (ET/P=0.42) compared to years that experience earlier peak SWE (DOY=86) and partition proportionally more snowmelt to ET (ET/P=0.56). Further point analyses also suggest that more rapid snowmelt results in proportionally less snowmelt partitioned to ET and more partitioned to runoff. To explore the underlying processes responsible for these relationships at the catchment scale we use the Regional Hydro</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26520265','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26520265"><span>Recent DDT and PCB contamination in the sediment and biota of the <span class="hlt">Como</span> Bay (Lake <span class="hlt">Como</span>, Italy).</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Bettinetti, R; Quadroni, S; Boggio, E; Galassi, S</p> <p>2016-01-15</p> <p>Due to its peculiar geographical and morphological characteristics, Lake <span class="hlt">Como</span> (Northern Italy) represents an interesting study-case for investigating the sub-basin scale circulation of persistent organic pollutants (POPs) that, despite being banned since the 1970s, have reached surprisingly high concentrations in some southern alpine lakes as a consequence of their release from melting glaciers in recent years. In particular, the <span class="hlt">Como</span> Bay, which is located in the city of <span class="hlt">Como</span>, seems noteworthy because its waters have a longer residence time than the other areas of the lake. The analyses of the historical concentration of PCBs, pp′DDT and its metabolites in a sediment core sampled from the <span class="hlt">Como</span> Bay covering a time-period from their ban to recent times, showed that the DDTs have never experienced a significant (p < 0.05) decrease over time, with concentrations of the most abundant homologue, pp′DDE, ranging from 27 to 75 ng g(-1) d.w. Conversely PCBs significantly (p < 0.05) decreased towards recent times, reaching concentrations around 80 ng g(-1) d.w. The contribution of high altitude and local sources was recorded also in the food web: both zooplankton and the zooplanktivorous fish agone were mainly contaminated by pp′DDE (81.4 ng g(-1) w.w. and 534.6 ng g(-1) w.w. respectively) and by the PCB metabolite hexa-CB (449.7 ng g(-1) w.w. and 1672.1 ng g(-1) w.w. respectively). The DDT concentrations in the agone (sampled during the years 2006–2009) never exceeded the limits for human consumption in Italy, while concentrations of six selected PCBs exceeded human health advisory recommendations in one of the fish samples analysed, when it was approximately two times higher than the recommended value of 125 ng g(-1) w.w.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2012ISPAn..I4..287B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2012ISPAn..I4..287B"><span>Valorisation of <span class="hlt">Como</span> Historical Cadastral Maps Through Modern Web Geoservices</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Brovelli, M. A.; Minghini, M.; Zamboni, G.</p> <p>2012-07-01</p> <p>Cartographic cultural heritage preserved in worldwide archives is often stored in the original paper version only, thus restricting both the chances of utilization and the range of possible users. The Web C.A.R.T.E. system addressed this issue with regard to the precious cadastral maps preserved at the State Archive of <span class="hlt">Como</span>. Aim of the project was to improve the visibility and accessibility of this heritage using the latest free and open source tools for processing, cataloguing and web publishing the maps. The resulting architecture should therefore assist the State Archive of <span class="hlt">Como</span> in managing its cartographic contents. After a pre-processing consisting of digitization and georeferencing steps, maps were provided with metadata, compiled according to the current Italian standards and managed through an ad hoc version of the GeoNetwork Opensource geocatalog software. A dedicated MapFish-based webGIS client, with an optimized version also for mobile platforms, was built for maps publication and 2D navigation. A module for 3D visualization of cadastral maps was finally developed using the NASA World Wind Virtual Globe. Thanks to a temporal slidebar, time was also included in the system producing a 4D Graphical User Interface. The overall architecture was totally built with free and open source software and allows a direct and intuitive consultation of historical maps. Besides the notable advantage of keeping original paper maps intact, the system greatly simplifies the work of the State Archive of <span class="hlt">Como</span> common users and together widens the same range of users thanks to the modernization of map consultation tools.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3987295','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3987295"><span><span class="hlt">Como</span> Lo Hago Yo: Defectos Del Cierre Del Tubo Neural En Nicaragua</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Gonzalez, Juan Bosco</p> <p>2014-01-01</p> <p>En Nicaragua no hay un plan de forltificación de alimentos con ácido fólico. Las madres son muy jóvenes. En La Mascota operamos mas de cuarenta niños por año. Derivación tardía es un <span class="hlt">problema</span>. La infección preoperatoria tiene que ser descartada. Vancomicina y Ceftriaxone estan indicadas. Estricta regla de asepsia operatoria. Suturamos la plaqueta para asemejar su forma al cilindro normal de la médula. No ceramos la capa de músculo. PMID:24791221</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/FR-2013-06-26/pdf/2013-15246.pdf','FEDREG'); return false;" href="https://www.gpo.gov/fdsys/pkg/FR-2013-06-26/pdf/2013-15246.pdf"><span>78 FR 38287 - Bitterroot National Forest, Darby Ranger District, <span class="hlt">Como</span> Forest Health Project</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collection.action?collectionCode=FR">Federal Register 2010, 2011, 2012, 2013, 2014</a></p> <p></p> <p>2013-06-26</p> <p>... Forest Service Bitterroot National Forest, Darby Ranger District, <span class="hlt">Como</span> Forest Health Project AGENCY: Forest Service. ACTION: Notice; Correction. SUMMARY: The Department of Agriculture (USDA), Forest Service, Bitterroot National Forest, Darby Ranger District published a document in the Federal Register of June 17...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED470327.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED470327.pdf"><span><span class="hlt">Como</span> preparar un programa de informacion sobre la asistencia economica (Planning a Financial Aid Awareness Program).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Department of Education, Washington, DC.</p> <p></p> <p>This booklet, written in Spanish, is intended to be used with a set of slides as part of a presentation to students on "How To Apply for Federal Student Aid" ("<span class="hlt">Como</span> Solicitar la Asistencia Economica Federal para Estudiantes"). The first part of the book is a script based on the slides. After the script is a guide to hosting a financial aid…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2002BAAA...45...76F','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2002BAAA...45...76F"><span>Cúmulos globulares <span class="hlt">como</span> trazadores de bimodalidad estelar en galaxias cD</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Forte, J. C.</p> <p></p> <p>Se muestra que tanto la forma de los perfiles de brillo <span class="hlt">como</span> de color observados en dos galaxias arquetípicas de tipo cD (NGC 1399 y NGC 4486) son compatibles con la presencia de poblaciones estelares bi-modales que comparten la misma distribución espacial y composición química de las familias dominantes de cúmulos globulares asociadas con ellas. El modelo resultante también predice una variación de la frecuencia específica de los cúmulos <span class="hlt">como</span> función del radio galactocéntrico. Se discute este resultado en el contexto de una variedad de escenarios astrofísicos que intentan describir la formación de galaxias cD.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27845063','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27845063"><span>Recrudescence of onchocerciasis in the <span class="hlt">Como</span>é valley in Southwest Burkina Faso.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Koala, Lassane; Nikiema, Achille; Post, Rory J; Paré, Alain Brice; Kafando, Claude Montant; Drabo, François; Traoré, Soungalo</p> <p>2017-02-01</p> <p>Onchocerciasis control by vector control was instigated in southwest Burkina Faso in January 1969 by ORSTOM/OCCGE, and continued until operations were taken over by the WHO Onchocerciasis Control Programme (OCP) in February 1975, which itself ceased operations in the area in 1989 when onchocerciasis was judged to have been reduced to insignificant levels. Initially (1969-1975) vector immigration maintained unacceptably high levels of transmission, but OCP was much larger than the preceding campaign and in 1975 the Annual Transmission Potential (ATP) dropped below 100 at all sites in the <span class="hlt">Como</span>é river valley except Folonzo, which continued to be subject to reinvasion, along with the whole of the Léraba river valley. However, after the southern extension of the OCP in 1979, ATPs dropped below 100 everywhere in the <span class="hlt">Como</span>é basin (including the Léraba valley), and further dropped to insignificant levels after the western extension of the OCP in 1985. Thus transmission dropped more quickly in the <span class="hlt">Como</span>é river valley than the Léraba river valley (which had been subject to vector reinvasion), and this was also reflected in prevalence of microfilaraemia in the human population. After 1986 prevalence was less than 5% in all villages in the <span class="hlt">Como</span>é river valley (except for two, which subsequently dropped to 0% and 3.7% by 1999). However, in 2001 (12 years after the cessation of vector control) the prevalence in one village in the <span class="hlt">Como</span>é river valley had increased to 39.6%, and two more had increased above 5% by 2007. New epidemiological surveys in 2011 and 2012 showed that in 13 out of 30 villages in the <span class="hlt">Como</span>é river valley prevalence of microfilaraemia was above 5%, although this was not observed in the Léraba river valley where prevalence remained low. This is the first documented case of recrudescence of onchocerciasis in the old OCP area, and the reasons are not clear. It is possible that there has been immigration of parasites with humans or vectors from areas where</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2010EGUGA..12..225J','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2010EGUGA..12..225J"><span>The Sefwi-<span class="hlt">Como</span>é belt Ghana/Ivory Coast : a major crustal shear zone ?</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Jessell, Mark</p> <p>2010-05-01</p> <p>The Palaeoproterozoic Sefwi-<span class="hlt">Como</span>é region that straddles Ghana and the Ivory Coast in West Africa has been characterised as resulting from a combination of compression and simple shear during late synkinematic leucogranite intrusion. The analysis of regional geophysical datasets allows us to better define the geometry of the major lithostratigraphic packages and their structural contacts in this region. This analysis reveals a series of well defined leucogranites intrusions enveloped by high strain zones. Recent finite element modelling of two-phase aggregates has shown that we can analyse the geometry of these systems both in terms of their finite defomation and their mechanical contrast. We interpret the geometries we see in the Sefwi-<span class="hlt">Como</span>é region as reflecting the activity of a major crustal deformation zone which was dominated by simple shear. The comparison with the modelling suggests a finite shear strain of approximately 5 gamma, which in turn implies a lateral displacement of 400 km across the belt. Our analysis suggests that the leucogranites were already acting as more rigid bodies during the (dextral?) shearing, suggesting that their emplacement was predominantly pre-kinematic, and which has implications for their potential subsequent remobilization by gravitational forces.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2002SPIE.4694..242W','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2002SPIE.4694..242W"><span>Remote structural monitoring of the Cathedral of <span class="hlt">Como</span> using an optical fiber Bragg sensor system</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Whelan, Maurice P.; Albrecht, Daniel; Capsoni, Antonio</p> <p>2002-07-01</p> <p>This paper describes a prototype system being developed for on-line structural monitoring of the cathedral of <span class="hlt">Como</span>, Italy. Monitoring is based on relative displacement and temperature measurements employing optical fibre Bragg grating transducers. System features include an edge-filter demodulation scheme with wavelength multiplexing, palmtop-based control with customised software, automated data acquisition and analysis and GSM-based data transmission via email. The system also offers the option to be solar powered, allowing it to be located in areas with limited access, such as on the cathedral roof. Initial results obtained over an eight-month demonstration period are also presented. The intention is to develop this prototype into a complete system for on-line structural monitoring of the Cathedral, offering real decision support to those responsible for its maintenance.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28002878','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28002878"><span>Fluid dipping technology of chimpanzees in <span class="hlt">Como</span>é National Park, Ivory Coast.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Lapuente, Juan; Hicks, Thurston C; Linsenmair, K Eduard</p> <p>2016-12-21</p> <p>Over a 6 month period during the dry season, from the end of October 2014 to the beginning of May 2015, we studied tool use behavior of previously unstudied and non-habituated savanna chimpanzees (Pan troglodytes verus) living in the <span class="hlt">Como</span>é National Park, Ivory Coast (CI). We analyzed all the stick tools and leaf-sponges found that the chimpanzees used to forage for ants, termites, honey, and water. We found a particular behavior to be widespread across different chimpanzee communities in the park, namely, dipping for water from tree holes using sticks with especially long brush-tip modifications, using camera traps, we recorded adults, juveniles, and infants of three communities displaying this behavior. We compared water dipping and honey dipping tools used by <span class="hlt">Como</span>é chimpanzees and found significant differences in the total length, diameter, and brush length of the different types of fluid-dipping tools used. We found that water dipping tools had consistently longer and thicker brush-tips than honey dipping tools. Although this behavior was observed only during the late dry season, the chimpanzees always had alternative water sources available, like pools and rivers, in which they drank without the use of a tool. It remains unclear whether the use of a tool increases efficient access to water. This is the first time that water dipping behavior with sticks has been found as a widespread and well-established behavior across different age and sex classes and communities, suggesting the possibility of cultural transmission. It is crucial that we conserve this population of chimpanzees, not only because they may represent the second largest population in the country, but also because of their unique behavioral repertoire.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3987293','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3987293"><span><span class="hlt">Como</span> Lo Hago Yo: Anomalías del Tubo Neural en Guatemala — Mielomeningocele Unidad de Espina Bífida e Hidrocefalia</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Manucci, Graciela; von Quednow, Enzo</p> <p>2014-01-01</p> <p>En Guatemala nacen por añ 786 niños con defectos de tubo neural. Operamos 65 a 70 niños con mielomenigocele por año. Tenemos equipo multidisciplinario. Recomendamos parto por cesárea. Infección antes de la cirugía es un <span class="hlt">problema</span> mayor. Derivación tardía es un <span class="hlt">problema</span>. Disecamos la plaqueta con la técnica clásica. Suturamos la plaqueta para restituir la forma de la médula. Corpectomía en casos de cifósis. Hidrocefalía: Operamos el 80% de los niños. Chiari II: Operamos basados en los síntomas, primero nos aseguramos que la válvula funciona bien. Médula anclada: Operamos basados en los síntomas. PMID:24791216</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28884774','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28884774"><span>High-energy asymmetric supercapacitors based on free-standing hierarchical <span class="hlt">Co-Mo-S</span> nanosheets with enhanced cycling stability.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Balamurugan, Jayaraman; Li, Chao; Peera, Shaik Gouse; Kim, Nam Hoon; Lee, Joong Hee</p> <p>2017-09-08</p> <p>Layered transition metal sulfides (TMS) are emerging as advanced materials for energy storage and conversion applications. In this work, we report a facile and cost-effective anion exchange technique to fabricate a layered, multifaceted, free standing, ultra-thin ternary cobalt molybdenum sulfide nanosheet (<span class="hlt">Co-Mo-S</span> NS) architecture grown on a 3D porous Ni foam substrate. The unique <span class="hlt">Co-Mo</span> layered double hydroxides are first synthesized as precursors and consequently transformed into ultra-thin <span class="hlt">Co-Mo-S</span> NS. When employed as an electrode for supercapacitors, the <span class="hlt">Co-Mo-S</span> NS delivered an ultra-high specific capacitance of 2343 F g(-1) at a current density of 1 mA cm(-2) with tremendous rate capability and extraordinary cycling performance (96.6% capacitance retention after 20 000 cycles). Furthermore, assembled Co-Mo-S/nitrogen doped graphene nanosheets (NGNS) in an asymmetric supercapacitor (ASC) device delivered an excellent energy density of 89.6 Wh kg(-1), an amazing power density of 20.07 kW kg(-1), and superior cycling performance (86.8% capacitance retention after 50 000 cycles). Such exceptional electrochemical performance of <span class="hlt">Co-Mo-S</span> NS is ascribed to the good electrical contact with the 3D Ni foam, ultra-high contact area with the electrolyte, and enhanced architectural softening during the charging/discharging process. It is expected that the fabricated, unique, ultra-thin <span class="hlt">Co-Mo-S</span> NS have great potential for future energy storage devices.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014AGUFM.H11G0973Z','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014AGUFM.H11G0973Z"><span>Application of the Vic Model to Predict Streamflow in the <span class="hlt">Como</span> Creek Watershed, Colorado Front Range</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Zhang, Q.; Williams, M. W.; Cowie, R. M.</p> <p>2014-12-01</p> <p>Mountains are water towers that provide water security to many billions of people. An outstanding question is how climate change may affect surface-groundwater interactions in snow and ice-covered catchments. To address this question, we applied the Variable Infiltration Capacity (VIC) model to the seasonally snow-covered <span class="hlt">Como</span> Creek watershed to simulate discharge. The results for the years 2005-2008 show that the simulated discharge approximated the measured data in 2008, while the other years have been underestimated. As for the year 2008, sensitivity analysis shows that the correctly simulated discharge depends greatly on soil depth2, depth3 and Ws. For example, a 1% increase in soil depth2, depth3 or Ws leads to 1.3%, 0.8% and 1.3% increases in the Nash-Sutcliffe efficiency (Er). When depth2 and depth3 increased at the same time, Er increased higher than merely depth2 or depth3. The VIC results suggest that 85% of discharge is from groundwater in this snow-covered catchment. End-member mixing analysis using isotopic and geochemical tracers in 2010 showed that groundwater is the main water source for discharge, suggesting that the VIC modeling results are reasonable. The calibration of the VIC model serves as the basis for future projections in discharge after perturbations such as climate change and increases in the magnitude and timing of wildfires.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27386296','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27386296"><span>Vulnerability and adaptation to climate change in the <span class="hlt">Comoe</span> River Basin (West Africa).</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Yéo, Wonnan Eugène; Goula, Bi Tié Albert; Diekkrüger, Bernd; Afouda, Abel</p> <p>2016-01-01</p> <p>Climate change is impacting water users in many sectors: water supply, farming, industry, hydropower, fishing, housing, navigation and health. Existing situations, like population growth, movement of populations from rural to urban areas, poverty and pollution can aggravate the impacts of climate change. The aim of the study is to evaluate the vulnerability of different water user groups to climate change and define communities' adaptation strategies in the <span class="hlt">Comoe</span> River Basin. Information was collected on communities' concerns and perception on changes in climate and potential adaptation measures and strategies. Results show that 95 % of the sample in the study communities had heard of it and are aware that climate change is occurring. They have been experiencing changes in economic activity and cropping pattern, reduced water level in rivers, crop failure, delay in cropping season, new pests and diseases, food insecurity, drop in income and decline in crop yield. Results also show that communities employ various adaptation strategies including crops diversification, substitution and calendar redefinition, agroforestry, borrowing from friends and money lenders and increasing fertilizer application.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_6");'>6</a></li> <li><a href="#" onclick='return showDiv("page_7");'>7</a></li> <li class="active"><span>8</span></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_8 --> <div id="page_9" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_7");'>7</a></li> <li><a href="#" onclick='return showDiv("page_8");'>8</a></li> <li class="active"><span>9</span></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="161"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/19198356','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/19198356"><span>Kinetic modeling of the SWNT growth by CO disproportionation on <span class="hlt">CoMo</span> catalysts.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Monzon, A; Lolli, G; Cosma, S; Mohamed, S B; Resasco, D E</p> <p>2008-11-01</p> <p>A kinetic model has been developed to describe the growth of single-walled carbon nanotubes (SWNT) in the CoMoCAT method, which is based on the disproportionation of CO on supported <span class="hlt">CoMo</span> catalysts. The model attempts to capture mathematically the different stages involved in this method: (i) catalyst activation or in-situ creation of active sites, i.e., reduced Co clusters by transformation of CoMoOx precursor species, or oxidized sites; (ii) CO decomposition over active sites, which increases the surface fugacity of carbon until reaching a certain threshold; (iii) nucleation of ordered forms of carbon; (iv) C diffusion (both across the surface and into the metal particle); (v) SWNT growth; (vi) termination, by either deactivation of the catalyst active sites or by increase in the carbon concentration at the metal/SWNT interface, approaching that of the metal/gas interface and eliminating the driving force for diffusion. Previous investigations have only explained the growth termination by the former. Here, we emphasize the possible contribution of the later and propose a novel "hindrance factor" to quantify the effect of nanotube interaction with its surroundings on the growth termination. To test the kinetic model and obtain typical values of the physical parameters, experiments have been conducted on a CoMo/SiO2 catalyst in a laboratory flow reactor, in which the rate of carbon deposition was continuously evaluated by the direct measurement of the CO2 evolution as a function of time. The experimental data are fitted very well with model.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27206065','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27206065"><span>Infezioni virali in ginecologia: un <span class="hlt">problema</span> risolto?</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Agnello, Antonella; Bevilacqua, Luciano; Ariviello, Rosa; Bandieramonte, Gaetano; Peroni, Mario; Simoncini, Ettore; Verdi, Piero; Zanardi, Claudio</p> <p>2016-06-01</p> <p>The aim of this observational study was to evaluate the effectiveness of a dietary integrator containing methionine, zinc, Echinacea angustifolia and E. purpurea, probiotics, and antioxidant factors (Immuno Gin) in the treatment of mild cervical dysplasia associated with human papillomavirus (HPV) infection. The study sample was 95 women (age range, 31-55 years) resident in various cities in Italy. Initial Pap test results showed abnormal changes in cervical cells described as atypical squamous cells of undetermined significance (ASC-US) and HPV infection in 23/95 women, 3 of which received the study product. Follow-up repeat Pap testing at 6 months returned normal test results in all 3. In 12 of the 20 women who did not receive treatment with the study product, the repeat Pap test at 6 months showed normal results, whereas persistence of lesions was observed in the other 8 women, with progression to low-grade squamous intraepithelial lesion (LSIL) in one case. Forty-five women presented initially with abnormal changes in cervical cells described as LSIL and HPV infection. Twenty received treatment with the study product; the repeat Pap test at 6 months showed normal results in 15 and no change in lesions in the other 5. Among the 25 women who did not receive treatment with the study product, the repeat Pap test at 6 months showed normal results in 13, whereas persistence of lesions was noted in the other 12, with progression to high-grade squamous intraepithelial lesion - moderate cervical intraepithelial lesion 2 (HSIL - CIN 2) in one case. Twenty-seven women with vulvoperineal condylomatosis received treatment with the study product, as described above, plus biophysical treatment of the lesions. At the 6-month follow-up assessment, no relapse of lesions occurred in 19, whereas relapse was noted in the other 8. Though the study sample is too small to draw statistically significant conclusions, the percentage of cases of lesion regression among the women treated with the study product was slightly higher than in those who did not receive treatment. Use of the study product may provide clinical benefit by stimulating immune defenses against HPV infection.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=problemas+OR+distribucion&id=EJ666996','ERIC'); return false;" href="http://eric.ed.gov/?q=problemas+OR+distribucion&id=EJ666996"><span>The Prisoner <span class="hlt">Problem--A</span> Generalization.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Gannon, Gerald E.; Martelli, Mario U.</p> <p>2000-01-01</p> <p>Presents a generalization to the classic prisoner problem, which is inherently interesting and has a solution within the reach of most high school mathematics students. Suggests the problem as a way to emphasize to students the final step in a problem-solver's tool kit, considering possible generalizations when a particular problem has been…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=Problemas+OR+drogas&pg=2&id=EJ666996','ERIC'); return false;" href="https://eric.ed.gov/?q=Problemas+OR+drogas&pg=2&id=EJ666996"><span>The Prisoner <span class="hlt">Problem--A</span> Generalization.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Gannon, Gerald E.; Martelli, Mario U.</p> <p>2000-01-01</p> <p>Presents a generalization to the classic prisoner problem, which is inherently interesting and has a solution within the reach of most high school mathematics students. Suggests the problem as a way to emphasize to students the final step in a problem-solver's tool kit, considering possible generalizations when a particular problem has been…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26262699','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26262699"><span>[PRE-OPERATIVE IRON DEFICIENCY IN BARIATRIC SURGERY: DIAGNOSIS AND TREATMENT].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Magali Sanchez, Angela María; Pampillón, Natalia; Abaurre, Mariela; Omelanczuk, Pablo Esteban</p> <p>2015-07-01</p> <p> descenso en el post OP (37,5% ± 3,4 y 12,3 g/l p < 0,05). La suplementación con <span class="hlt">hierro</span> EV en pacientes ferropénicos (n = 9) aumentó la hemoglobina (13,5 g/l ± 0,7) con respecto al pre OP (12,8 g/l ± 1,2; p:0,05), así <span class="hlt">como</span> la saturación de transferrina y ferritina. Al mes de la cirugía el Hematocrito no tuvo cambios significativos (Hematocrito pre OP: 39%; Hematocrito post OP: 40% p: > 0,05). Discusion:1) Casi el 26% de los pacientes presentan ferropenia en el pre OP. 2) El tratamiento con <span class="hlt">hierro</span> EV parece ser eficaz para prevenir un descenso de hematocritos y mejorar el metabolismo del <span class="hlt">hierro</span> en pacientes ferropénicos previos a la cirugía. Los pacientes sin ferropenia al mes de la cirugía mantienen valores normales de hematocritos y metabolismo del <span class="hlt">hierro</span> sin necesidad de suplementación de <span class="hlt">hierro</span>.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/24528348','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/24528348"><span>Prevalence and determinants of the dual burden of malnutrition at the household level in Puna and Quebrada of Humahuaca, Jujuy, Argentina.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Bassete, M N; Romaguera, D; Giménez, M A; Lobo, M O; Samman, N C</p> <p>2014-02-01</p> <p>El objetivo del presente estudio fue identificar los hogares en los que coexisten el sobrepeso y bajo peso (doble carga de malnutrición) y explorar los factores que podrían contribuir a la doble carga de malnutrición en los hogares de esta población. Después de aplicar los criterios de exclusión, se incluyeron 136 hogares. Las madres fueron clasificadas <span class="hlt">como</span> de peso normal o con sobrepeso/ obesidad basado en puntos de corte del índice de masa corporal (IMC), los niños y adolescentes fueron clasificados según z–score de la talla para la edad, si tenían o no retraso en el crecimiento (Stunted). Los hogares con una madre obesa y niños o adolescentes con retraso en el crecimiento fueron clasificados <span class="hlt">como</span> hogares de doble carga. La prevalencia de hogares con doble carga fue del 12 %. En comparación con los otros hogares, en los hogares con doble carga de malnutrición habitan un mayor número de personas en la casa, y el nivel de educación del jefe de familia fue menor. Las personas que viven en hogares de doble carga mostraron ingestas de energía global más bajas y eran más propensos a tener una ingesta insuficiente de calcio y <span class="hlt">hierro</span>. Una de las principales causas de la doble carga de malnutrición observada en esta comunidad podría ser la transición nutricional. Los resultados presentados aquí indican la necesidad de considerar a los programas que se centran en un solo tipo de <span class="hlt">problema</span> nutricional y que en realidad podrían exacerbar el otro.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016MSMSE..24b5009P','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016MSMSE..24b5009P"><span>Ab initio study of energetics and magnetism of sigma phase in <span class="hlt">Co-Mo</span> and Fe-Mo systems</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Pavlů, J.; Vřešťál, J.; Šob, M.</p> <p>2016-02-01</p> <p>We analyse, from first-principles, the energetics and magnetic ordering of sigma phases in <span class="hlt">Co-Mo</span> and Fe-Mo systems. Total energy differences between the sigma phase and Standard Element Reference (SER) structures are calculated in the whole concentration range at equilibrium volumes by means of the linear muffin-tin orbitals method in the atomic-sphere approximation (LMTO-ASA), the full-potential linearised augmented-plane waves (FLAPW) method and the pseudopotential approach. They are compared with the enthalpy of formation of sigma phase obtained from the phase equilibria calculations at higher temperature based on the semiempirical CALPHAD (CALculation of PHAse Diagram) method. It turns out that the binary sigma phases are more stable than the weighted average of the sigma phase of elemental constituents and that this stability for Fe-Mo is higher than for <span class="hlt">Co-Mo</span>. On the other hand it was found that the binary sigma phases do not exhibit any stability with respect to the weighted average of the SER structures. The magnetic configurations in all systems are investigated and the stabilizing effect of magnetic order in sigma phase at 0 K is presented. It turns out that the atomic magnetic moment strongly depends on the type of occupied sublattice and total composition of the alloy.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4148045','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4148045"><span>Alejarse <span class="hlt">como</span> proceso social: niños y ancianos «abandonados» en Ayacucho1</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Leinaweaver, Jessaca</p> <p>2013-01-01</p> <p>En investigaciones previas sobre el acogimiento familiar y la adopción en Ayacucho, se ha podido descubrir cómo los ayacuchanos adquieren y producen relaciones sociales. Mientras negocian creativamente los discursos y espacios construidos simultáneamente por instituciones, comunidades, y estructuras sociales, van adquiriendo nuevas formas de relacionarse. Este artículo discute el proceso opuesto: el deshacerse de relaciones de parentesco, y el proceso social del abandono o alejamiento. Cuando se aleja a una persona de su familia o su comunidad, los que se quedan en ella llegan a entenderse <span class="hlt">como</span> ciertos tipos de personas. En los estudios de caso discutidos aquí, recopilados a través de una detallada y cuidadosa observación participante y de entrevistas etnográficas grabadas entre 2001 y 2007, se puede ver cómo, después de un alejamiento social, los individuos que alejan se reinterpretan <span class="hlt">como</span> sujetos que se encuentran superándose o volviéndose modernos, o bien sacrificándose. PMID:25177044</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2012EGUGA..14.7519H','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2012EGUGA..14.7519H"><span>Late Glacial to Holocene environmental variabilities: A new multi-proxy paleolimnological study of sedimentary sequences from <span class="hlt">Como</span> (northern Italy)</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Höbig, N.; Martinelli, E.; Motella, S.; Michetti, A. M.; Livio, F.; Tinner, W.; Reicherter, K.; Castelletti, L.</p> <p>2012-04-01</p> <p>Lake <span class="hlt">Como</span> (northern Italy) is the deepest Italian lake, reaching a depth of about 425 m. The lambda-shaped lake expands about 45 km in NE-SW direction. Southwards of the hydrologically closed western branch, two sediment cores of 70 m (S1) and 65 m length (S2) were taken in the year 2005 close to the cathedral of <span class="hlt">Como</span> (Piazza Verdi). The drilling sites are located in the middle of the Southern Alps, some 300 m from the present-day lakeshore. The cores provide the first detailed Late Glacial to Holocene multi-proxy record for the Lake <span class="hlt">Como</span> basin. Our research is aimed at investigating the environmental and geological evolution of the Insubria Region. The multi-proxy study of the stratigraphic sequences contain geophysical, geotechnical, sedimentological, paleobotanical, and radiocarbon analyses. They have been performed for core S1 and are still in progress on core S2. With this data the working group focuses on two main issues. The first topic is the reconstruction of the natural and anthropogenic processes controlling the ground subsidence in the <span class="hlt">Como</span> urban area (e.g., Comerci et al., 2007) and another aim is to reconstruct vegetation and land-use dynamics. In particular, 150 samples of vegetal macroremains have been collected in the palustrine deposits along S1 core, down to 31,00 m. Below this depth (dated 14C 12,496 ± 55 yr BP - 15,050 - 14,250 cal yr BP), the amount of plant macroremains in the sediment drops dramatically. The taxonomic determination was carried out on more than 800 macroremains. They are represented by fragments of wood, leaves, needles, seeds, fruits, mosses and tiny charcoals (Motella, 2009, unpublished PhD Thesis). Picea/Larix, Pinus sp., Juniperus with Betula, found in the deeper levels (30.80 - 30.00 m), are the first arboreal taxa that colonized the shores of Lake <span class="hlt">Como</span>, and show that the reforestation began in this area about 16,000 years ago. During the early Holocene (25.10 m) Abies alba expanded and further upwards the sequence</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2017ApSS..412..138L','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2017ApSS..412..138L"><span>Ternary CoS2/MoS2/RGO electrocatalyst with <span class="hlt">CoMoS</span> phase for efficient hydrogen evolution</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Liu, Yan-Ru; Shang, Xiao; Gao, Wen-Kun; Dong, Bin; Chi, Jing-Qi; Li, Xiao; Yan, Kai-Li; Chai, Yong-Ming; Liu, Yun-Qi; Liu, Chen-Guang</p> <p>2017-08-01</p> <p><span class="hlt">CoMoS</span> phase with metallic character plays crucial role on enhancing the activity of MoS2 electrocatalysts for hydrogen evolution reaction (HER). However, only Co atoms located in the edges of MoS2 can create <span class="hlt">CoMoS</span> phase, so it is a challenge to obtain <span class="hlt">CoMoS</span> phase with homogeneous distribution limited by the layered MoS2 and doping method of Co. Herein, we reported a simple one-pot hydrothermal method to prepare novel ternary CoS2/MoS2/RGO with <span class="hlt">CoMoS</span> phase for HER using reduced graphene oxide (RGO) as support. XPS proves the formation of <span class="hlt">CoMoS</span> phase, implying the enhanced activity for HER. RGO support ensures the well distribution of <span class="hlt">CoMoS</span> phase and enhances the conductivity of CoS2/MoS2/RGO. Compared to CoS2/RGO, MoS2/RGO and CoS2/MoS2, the obtained CoS2/MoS2/RGO shows superior activity for HER with an onset overpotential of -80 mV (vs. RHE), small Tafel slope of 56 mV dec-1, high exchange current density of 11.4 μA cm-2 and rigid electrochemical durability. The enhanced performances for HER may be ascribed to the formation of <span class="hlt">CoMoS</span> phase with high activity and the existence of RGO support with good electrical conductivitys in ternary CoS2/MoS2/RGO. Therefore, the introduction of <span class="hlt">CoMoS</span> phase and RGO into MoS2 could effectively enhance electrocatalytic properties for HER.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/21992305','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/21992305"><span>Interaction of <span class="hlt">Co(m)O</span>(-) (m = 1-3) with water: anion photoelectron spectroscopy and density functional calculations.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Li, Ren-Zhong; Xu, Hong-Guang; Cao, Guo-Jin; Zhao, Yu-Chao; Zheng, Wei-Jun</p> <p>2011-10-07</p> <p>We investigated the reactions between cobalt-oxides and water molecules using photoelectron spectroscopy and density functional calculations. It has been confirmed by both experimental observation and theoretical calculations that dihydroxide anions, Co(m)(OH)(2)(-) (m = 1-3), were formed when <span class="hlt">Co(m)O</span>(-) clusters interact with the first water molecule. Addition of more water molecules produced solvated dihydroxide anions, Co(m)(OH)(2)(H(2)O)(n)(-) (m = 1-3). Hydrated dihydroxide anions, Co(m)(OH)(2)(H(2)O)(n)(-), are more stable than their corresponding hydrated metal-oxide anions, Co(m)O(H(2)O)(n+1)(-). © 2011 American Institute of Physics</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2008BASBr..28...98D','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2008BASBr..28...98D"><span>A Utilização da Astronomia <span class="hlt">como</span> Tema Interdisciplinar e Aplicações de Objetos de Aprendizagem</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>da Silva, L. A.; Voelzke, M. R.</p> <p>2008-09-01</p> <p>Este trabalho visa analisar a possibilidade de relacionar conteúdos aplicados no ensino fundamental e médio de forma interdisciplinar por intermédio da astronomia, com a intervenção de objetos de aprendizagem que possam integrar as disciplinas e a utilização de recursos tecnológicos. Em uma pesquisa prévia com 20 professores de uma escola estadual situada na cidade de Guarulhos foi observado que apenas 25% dos professores utilizam algum recurso tecnológico para o desenvolvimento de conteúdos pertinentes à sua disciplina, tais <span class="hlt">como</span> sites e softwares educativos, sendo que a maioria absoluta continua ensinando apenas com livros didáticos. A maior parte dos professores apresenta dificuldades em trabalhar sua disciplina de forma interdisciplinar, ou seja, 75% dos professores preferem aplicar os conteúdos seguindo uma hierarquia linear de tópicos, evitando a discussão de temas que de alguma forma estão relacionados. A astronomia pode vir à fascinar o ser humano e despertar sua curiosidade promovendo um maior interesse no aprendizado, podendo favorecer análises interdisciplinares de forma lógica e objetiva, desta forma colocar a astronomia <span class="hlt">como</span> tema motivador interdisciplinar, pode ser relevante no que se refere ao distanciamento da fragmentação dos conteúdos. No Estado de São Paulo, a implantação da proposta curricular no ensino fundamental e médio mostra claramente a inserção da astronomia na maior parte das séries, principalmente na 6ª série em que todo o bimestre se fala de astronomia.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1996BAAA...40R...2B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1996BAAA...40R...2B"><span>Las fulguraciones <span class="hlt">como</span> manifestación de reconexión en el campo magnético solar</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Bagalá, L. G.; Mandrini, M. C.; Rovira, M. G.; Démoulin, P.</p> <p></p> <p>Las fulguraciones solares son fenómenos transitorios de liberación de energía que se desarrollan en las estructuras magnéticas de las regiones activas del Sol. Las fulguraciones pueden llegar a liberar hasta 1032 erg en 100 seg. en todo el rango electromagnético, y acelerar partículas. En este trabajo mostramos que la ubicación de los abrillantamientos en Hα de diversas fulguraciones está relacionado con las propiedades de las conexiones de las líneas del campo magnético de la región, <span class="hlt">como</span> se espera por las teorías de reconexión en 3D recientemente desarrolladas (Démoulin et al, 1996a). El campo magnético coronal se extrapola del campo fotosférico observado suponiendo una configuración libre de fuerzas lineal. Por medio de un algoritmo se determinan las regiones donde existe un cambio drástico en la conectividad de las líneas de campo (límites ``cuasi-discontinuos'', o cuasi-separatrices CS). Las CS son bandas abiertas que identifican zonas donde el campo magnético se reconectará con más probabilidad y, siempre que las mismas sean lo suficientemente finas, se producirá allíla liberación de energía proveniente del campo magnético. Hemos encontrado que en todas las regiones fulgurantes estudiadas (Démoulin et al, 1996b) existen CS en los mismos lugares donde se observaron los abrillantamientos en Hα. Allídonde coinciden los abrillantamientos con las CS, éstas tienen un espesor menor que 1 Mm. Las líneas de campo coronales extrapoladas de nuestro modelo tienen sus orígenes fotosféricos a ambos lados de las CS, <span class="hlt">como</span> se espera dados los recientes estudios de reconexión magnética en 3D. Estos resultados ponen a prueba los modelos presentes sobre fulguraciones solares.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/22925737','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/22925737"><span>In-situ HRTEM study of the reactive carbide phase of <span class="hlt">Co/MoS</span>2 catalyst.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Ramos, Manuel; Ferrer, Domingo; Martinez-Soto, Eduan; Lopez-Lippmann, Hugo; Torres, Brenda; Berhault, Gilles; Chianelli, Russell R</p> <p>2013-04-01</p> <p>Hydrotreatment catalytic operations are commonly performed industrially by layered molybdenum sulfide promoted by cobalt or nickel in order to remove heteroelements (S, N, O) from fossil fuels and biofuels. Indeed, these heteroelements are responsible of the emission of pollutants when these fuels are used in vehicles. In this respect, previous studies made by our research group have shown that the active phase under steady state conditions is partially carbided while strong bending effects of MoS2 slabs were also observed. However, up to now, the morphology of the resulting Co/MoSxCy carbided catalyst has not been fully characterized. In the present study, for the first time, a chemical reaction between the carbon content of a TEM Cu/C grid and a freshly sulfide <span class="hlt">Co/MoS</span>2 catalyst was in situ observed at 300 °C and 450 °C by HRTEM experimental techniques at ~10 nm of resolution. Results indicate that bending of MoS2 layers occurred due to carbon addition on MoS2 edge sites, as observed in stabilized catalysts after HDS reaction. Using a silicon grid, only cracks of MoS2 slabs were observed without bending effect confirming the role of structural-carbon in this change of morphology.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28441638','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28441638"><span>Health risk assessment for the consumption of fresh and preserved fish (Alosa agone) from Lago di <span class="hlt">Como</span> (Northern Italy).</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Quadroni, Silvia; Bettinetti, Roberta</p> <p>2017-07-01</p> <p>Although banned in many countries for decades, DDTs and PCBs still represent a global threat to food safety. As these contaminants are still present in aquatic ecosystems, fish can be an important contributor to their total dietary intake. Alosa agone specimens were sampled over a period of 10 years (from 2006 to 2015) to provide a representative overview of the DDT and PCB levels of Lago di <span class="hlt">Como</span>, a deep Italian lake where a DDT input due to secondary sources was observed in recent years. The potential health risk from the consumption of both fresh and preserved fish was evaluated. While DDT levels have generally decreased during the monitored period, reaching quite stable levels, PCB concentrations were variable, with values exceeding, in some cases, the European Union limit for human consumption and enabling potential carcinogenic effects. However, typical local processing of this fish species markedly appeared to decrease these contaminant levels, thus making the fish product (called missoltino) a safer food. The results of this work highlighted the need of continuous biomonitoring of those contaminants considered a past issue along with the emergent ones. Copyright © 2017 Elsevier Inc. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28762261','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28762261"><span>Self-Templating Construction of Hollow Amorphous <span class="hlt">CoMoS</span>4 Nanotube Array towards Efficient Hydrogen Evolution Electrocatalysis at Neutral pH.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Wang, Weiyi; Ren, Xiang; Hao, Shuai; Liu, Zhiang; Xie, Fengyu; Yao, Yadong; Asiri, Abdullah M; Chen, Liang; Sun, Xuping</p> <p>2017-09-18</p> <p>Environmentally friendly electrochemical hydrogen production needs the development of earth-abundant catalyst materials for the hydrogen evolution reaction with high activity and durability at neutral pH. In this work, the self-templating construction of a hollow amorphous <span class="hlt">CoMoS</span>4 nanotube array on carbon cloth (<span class="hlt">CoMoS</span>4 NTA/CC) is reported, using hydrothermal treatment of a Co(OH)F nanowire array on CC in (NH4 )2 MoS4 solution. When used as a 3D electrode for hydrogen evolution electrocatalysis, the resulting <span class="hlt">CoMoS</span>4 NTA/CC demonstrates superior catalytic activity and strong long-term electrochemical durability in 1.0 M phosphate buffer solution (pH=7). It shows small onset overpotential of 21 mV and requires low overpotentials of 104 and 179 mV to drive geometrical current densities of 10 and 50 mA cm(-2) , respectively. Density functional theory calculations suggest that <span class="hlt">CoMoS</span>4 has a more favorable hydrogen adsorption free energy than Co(OH)F. © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26040346','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26040346"><span>Iron status and dietary intakes of iron in normal-weight and obese young Mexican women.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Tijerina-Sáenz, Alexandra; Martínez-Garza, Nancy E; Ramírez-López, Erik; Solís-Pérez, Elizabeth; Martínez-Báez, Adbel Z</p> <p>2015-06-01</p> <p>Introducción: la obesidad se ha reportado <span class="hlt">como</span> predictor de la deficiencia de <span class="hlt">hierro</span>. En México, el 45,5% de las mujeres mayores de 20 años tienen obesidad, y la prevalencia de anemia es de 10,2% en mujeres de 20 a 29 años. Objetivo: investigar la relación entre índice de masa corporal (IMC), porcentaje de grasa (%GC), ingesta dietética y reservas de <span class="hlt">hierro</span> en mujeres jóvenes sanas con normopeso y obesidad. Métodos: ochenta y seis mujeres [normopeso (n = 46) y obesidad (n = 40)] completaron el estudio. La ingesta fue evaluada por un diario de registro de 8 días. La antropometría y obtención de sangre (hemoglobina, hematocrito, ferritina y transferrina) se consiguieron en la fase lútea del ciclo menstrual; se reportaron las características de la menstruación. Las reservas de <span class="hlt">hierro</span> se determinaron según etapas de depleción. Pruebas de T y Mann-Whitney U se usaron para comparar variables entre grupos. La correlación de Pearson se usó para determinar relaciones entre variables. La razón de momios se utilizó para medir la asociación de IMC, %GC e ingesta dietética con las reservas de <span class="hlt">hierro</span>. Resultados: los marcadores de <span class="hlt">hierro</span> fueron similares entre grupos. Se encontró una relación positiva entre %GC y ferritina (r = 0,222; p = 0,032). La similitud en ingesta y periodos menstruales puede ser la razón de que existan reservas de <span class="hlt">hierro</span> similares. El IMC, %GC e ingesta dietética no contribuyeron independientemente a las etapas de depleción de <span class="hlt">hierro</span>. Conclusión: se sugiere guía dietética para esta población con el fin de evitar complicaciones por deficiencia de <span class="hlt">hierro</span>.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25617577','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25617577"><span>Effect of alpha lipoic acid on the blood cell count and iron kinetics in hypertensive patients.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Mendes, Paula Renata Florêncio; Félix, Danielle dos Santos; Silva, Paulo César Dantas da; Pereira, Guêdijany Henrique; Simões, Mônica Oliveira da Silva</p> <p>2014-11-03</p> <p>Introducción: El Ácido -Lipóico (ALA) ha sido utilizado <span class="hlt">como</span> recurso terapéutico para reducir daño oxidativo en la Hipertensión Arterial Sistémica (HAS), pero aún no existen estudios in vivo que reporten sobre su mecanismo de acción en el metabolismo del <span class="hlt">hierro</span>. Objetivo: Evaluar el efecto antioxidante del ácido Alfa- Lipóico sobre el hemograma y metabolismo del <span class="hlt">hierro</span> en individuos hipertensos con o sin anemia. Métodos: Estudio clínico doble-ciego, randomizado y controlado con placebo. La muestra fue constituida por 60 individuos hipertensos, distribuidos aleatoriamente en grupo tratamiento (n = 32), que recibió 600 mg/día del ALA por doce semanas y grupo control (n = 28), que recibió el placebo por el mismo período. Fueron analizados antes y después de la intervención, los parámetros del hemograma, <span class="hlt">Hierro</span> Sérico, Ferritina, Capacidad Latente de Enlace del <span class="hlt">hierro</span>, Capacidad Total de Enlace del <span class="hlt">Hierro</span>, Índice de Saturación de la Transferrina (ISI) y Transferrina. Para evaluar las alteraciones entre los grupos, se utilizó el teste t de Student y el análisis de varianza ANOVA, adoptándose el nivel de significación de 5%. Resultados: Después de la intervención, el suplemento con el ALA demostró una asociación estadísticamente significativa (p < 0,05) con la reducción de los leucocitos totales, aumento del número de neutrófilos y reducciones en los niveles de <span class="hlt">Hierro</span> Sérico e ISI. Conclusión: La administración oral del ALA <span class="hlt">como</span> un adyuvante terapéutico, altera la respuesta hematológica del leucograma y reduce la absorción del <span class="hlt">hierro</span>. Cabe senãlar que el mecanismo de quelación de metales por el ácido lipoico puede ser responsable de estos cambios y, en consecuencia, podría desencadenar una condicion de anemia ferropénica en individuos hipertensos.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28099799','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28099799"><span>Hierarchically Porous Electrocatalyst with Vertically Aligned Defect-Rich <span class="hlt">CoMoS</span> Nanosheets for the Hydrogen Evolution Reaction in an Alkaline Medium.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Wu, Zexing; Guo, Junpo; Wang, Jie; Liu, Rong; Xiao, Weiping; Xuan, Cuijuan; Xia, Kedong; Wang, Deli</p> <p>2017-02-15</p> <p>Effective electrocatalysts for the hydrogen evolution reaction (HER) in alkaline electrolytes can be developed via a simple solvothermal process. In this work, first, the prepared <span class="hlt">CoMoS</span> nanomaterials through solvothermal treatment have a porous, defect-rich, and vertically aligned nanostructure, which is beneficial for the HER in an alkaline medium. Second, electron transfer from cobalt to MoS2 that reduces the unoccupied d orbitals of molybdenum can also enhance the HER kinetics in an alkaline medium. This has been demonstrated via a comparison of the catalytic performances of <span class="hlt">CoMoS</span>, CoS, and MoS2. Third, the solvothermal treatment time evidently impacts the electrocatalytic activity. As a result, after 24 h of solvothermal treatment, the prepared <span class="hlt">CoMoS</span> nanomaterials exhibit the lowest onset potential (42 mV) and overpotential (98 mV) for delivering a current density of 10 mA cm(-2) in a 1 M KOH solution. Thus, this study provides a simple method to prepare efficient electrocatalysts for the HER in an alkaline medium.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1992RMxF...38..701A','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1992RMxF...38..701A"><span>El <span class="hlt">problema</span> de N cuerpos en la astronomia.</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Aguilar, L. A.</p> <p>1992-10-01</p> <p>The N-body problem is one of the classic problems of celestial mechanics whose importance, nowadays, goes beyond the realm of our planetary system. The N-body problem plays a central role in the field of dynamics of stellar and galactic systems, as well as in cosmology. The author reviews the role that the N-body problem plays in modern astronomy. He describes the main algorithms presently in use, and illustrates each with examples of current interest in astronomy. He discusses the limits of validity of these numerical algorithms and the dangers in their misuse. Finally, he sketches the future prospects in this field.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_7");'>7</a></li> <li><a href="#" onclick='return showDiv("page_8");'>8</a></li> <li class="active"><span>9</span></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_9 --> <div id="page_10" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_8");'>8</a></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li class="active"><span>10</span></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="181"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/EJ097206.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/EJ097206.pdf"><span>Puertorriquenos En Chicago: El <span class="hlt">Problema</span> Educativo Del Dropout</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Lucas, Isidro</p> <p>1974-01-01</p> <p>Article written in Spanish. Defines the term "dropout," discusses the characteristics and motivations of Puerto Rican school dropouts in Chicago, and outlines the problems in educating them. (Author/RJ)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED470827.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED470827.pdf"><span>Emotional Disturbance. Fact Sheet = <span class="hlt">Problemas</span> Emocionales. Hojas Informativas Sobre Discapacidades.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>National Information Center for Children and Youth with Disabilities, Washington, DC.</p> <p></p> <p>This fact sheet, written in both English and Spanish, provides a definition, information on incidence, typical characteristics, and educational implications of emotional disturbance. The definition is from the Individuals with Disabilities Education Act (IDEA) and incidence in 1999-2000 is reported as about 470,000 children and youth. Educational…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=Problemas+OR+drogas&pg=2&id=EJ097206','ERIC'); return false;" href="https://eric.ed.gov/?q=Problemas+OR+drogas&pg=2&id=EJ097206"><span>Puertorriquenos En Chicago: El <span class="hlt">Problema</span> Educativo Del Dropout</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Lucas, Isidro</p> <p>1974-01-01</p> <p>Article written in Spanish. Defines the term "dropout," discusses the characteristics and motivations of Puerto Rican school dropouts in Chicago, and outlines the problems in educating them. (Author/RJ)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=Problemas+OR+drogas&id=ED470827','ERIC'); return false;" href="https://eric.ed.gov/?q=Problemas+OR+drogas&id=ED470827"><span>Emotional Disturbance. Fact Sheet = <span class="hlt">Problemas</span> Emocionales. Hojas Informativas Sobre Discapacidades.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>National Information Center for Children and Youth with Disabilities, Washington, DC.</p> <p></p> <p>This fact sheet, written in both English and Spanish, provides a definition, information on incidence, typical characteristics, and educational implications of emotional disturbance. The definition is from the Individuals with Disabilities Education Act (IDEA) and incidence in 1999-2000 is reported as about 470,000 children and youth. Educational…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2005BASBr..25a..83D','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2005BASBr..25a..83D"><span><span class="hlt">Como</span> os Alunos do Ensino Médio da Rede Estadual de São Paulo obtém Conhecimentos Astronômicos?</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>da Cunha, W. S.; Voelzke, M. R.; Amaral, L. H.</p> <p>2005-08-01</p> <p>Atualmente vivencia-se um mundo globalizado onde os computadores e a internet permitiram um acesso rápido e seguro a todo tipo de informação e conhecimento. O presente trabalho visa analisar a maneira pela qual alunos de segundo grau da rede estadual da cidade de São Paulo obtiveram, caso tenham, conhecimentos básicos de astronomia quanto aos fenômenos celestes que os rodeiam, tais <span class="hlt">como</span> a sucessão dos dias e das estações do ano, além de questioná~los sobre fatos genéricos tais <span class="hlt">como</span>: o que vem a ser o Sol, o Big Bang, o que ocasionou a extinção dos dinossauros. Para tanto foi elaborado um formulário constando de questões de múltipla escolha, o qual foi aplicado no primeiro colegial diurno da Escola Estadual Guilherme de Almeida. Num espaço amostral de 44 alunos constatou-se que 41% dos alunos adquiriram seus conhecimentos astronômicos na escola e 59% através da mídia em geral. Neste mesmo espaço amostral apenas 11% dos alunos usaram computadores na escola, 41% na residência, 5% no trabalho e 43% não utilizaram. O presente estudo revelou também que para 50% dos alunos o professor jamais utilizou um programa de computador a respeito de astronomia ou fez alguma apresentação sobre o tema. Embora em sua fase inicial este estudo revela claramente que a maioria dos alunos não obtém na escola seus conhecimentos astronômicos, estes provém de fontes não especificamente didático-pedagógicas tais <span class="hlt">como</span> filmes e revistas populares que não raramente geram conhecimentos incompletos e em muitos casos inclusive falhos.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3980004','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3980004"><span>Tal <span class="hlt">Como</span> Somos/Just As We Are: An Educational Film to Reduce Stigma towards Gay and Bisexual Men, Transgender Individuals & Persons Living with HIV/AIDS</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Ramirez-Valles, Jesus; Kuhns, Lisa M.; Manjarrez, Dianna</p> <p>2013-01-01</p> <p>In this paper we describe the development and dissemination of a film-based educational intervention to reduce negative attitudes towards gay and bisexual men and transgender women (GBT) and people living with HIV/AIDS (PLWHA) in Latino communities, with a focus on youth. The intervention, Tal <span class="hlt">Como</span> Somos/Just as We Are, is based on stigma and attribution theories, extensive formative research, and community input. Evaluation findings among educators and school youth suggest the film has the potential to effectively impact attitudes towards GBT and PLWHA. The film and intervention are being disseminated using diffusion of innovations theory through community-based organizations, schools, television broadcasting and film festivals. PMID:24377496</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/24377496','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/24377496"><span>Tal <span class="hlt">Como</span> Somos/just as we are: an educational film to reduce stigma toward gay and bisexual men, transgender individuals, and persons living with HIV/AIDS.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Ramirez-Valles, Jesus; Kuhns, Lisa M; Manjarrez, Dianna</p> <p>2014-04-01</p> <p>In this article, the authors describe the development and dissemination of a film-based educational intervention to reduce negative attitudes toward gay and bisexual men, transgender women, and people living with HIV/AIDS in Latino communities, with a focus on youth. The intervention, Tal <span class="hlt">Como</span> Somos/Just as We Are, is based on stigma and attribution theories, extensive formative research, and community input. Evaluation findings among educators and school youth suggest the film has the potential to effectively influence attitudes toward gay and bisexual men, transgender women, and people living with HIV/AIDS. The film and intervention are being disseminated using diffusion of innovations theory through community-based organizations, schools, television broadcasting, and film festivals.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2003BASBr..23...81P','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2003BASBr..23...81P"><span>Telescópio de pequeno porte <span class="hlt">como</span> suporte ao ensino em cidades com intensa poluição luminosa II</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Pereira, P. C. R.; Santos-Júnior, J. M.; Cruz, W. S.</p> <p>2003-08-01</p> <p>Para a maioria dos estudantes, sua passagem pelo ensino formal fundamental envolve a transmissão de fatos que devem ser guardados para um exame, a habilidade para lembrar fórmulas e, eventualmente, a repetição de experimentos que devem produzir resultados exigidos pelo professor. O resultado deste modelo de ensino, ao longo dos anos, é conhecido por todos: desconhecimento e descontentamento, por parte dos estudantes, de temas relativos ao papel e aos processos da ciência. Acreditamos que a Astronomia, pelo seu caráter observacional, é uma das áreas do conhecimento que pode contribuir neste cenário. A Fundação Planetário da Cidade do Rio de Janeiro possui um telescópio Meade LX-200 (25cm) que, juntamente com as câmeras CCD ST-7E e ST8E, tem sido utilizado em projetos voltados aos estudantes do ensino médio desde o ano 2000. Tais projetos envolvem a condução de um projeto de pesquisa observacional num nível apropriado, e possibilitam o contato com técnicas e novas tecnologias: computador, software para manipulação de dados e gráficos, programas de tratamento e redução de dados, uso de equipamentos óptico-eletrônicos (telescópio e CCD), bem <span class="hlt">como</span> o processo de aquisição de conhecimento. Dentro da proposta dos anos anteriores, priorizamos projetos de uma noite, ou seja, procuramos trabalhar com fenômenos que apresentem variabilidade com intervalo de recorrência relativamente curto. Em todos os casos, optamos pela fotometria diferencial, que tem se mostrado bastante eficiente para o céu luminoso <span class="hlt">como</span> o da cidade do Rio de Janeiro. Neste painel, apresentamos alguns dos projetos desenvolvidos no último ano, com 25 estudantes. Apresentamos os resultados da observação da variável pulsante AI Vel (V = 6,6) e da variável cataclísmica FO Aqr (V = 13,5), e do monitoramento do trânsito da lua de Júpiter, Europa, ocorrido em 30 de abril de 2003. As curvas de luz produzidas para as primeiras estão concordantes com as da literatura, assim</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2017QSRv..161...45M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2017QSRv..161...45M"><span>Climatic and anthropogenic forcing of prehistorical vegetation succession and fire dynamics in the Lago di <span class="hlt">Como</span> area (N-Italy, Insubria)</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Martinelli, Elisa; Michetti, Alessandro Maria; Colombaroli, Daniele; Mazzola, Eleonora; Motella De Carlo, Sila; Livio, Franz; Gilli, Adrian; Ferrario, Maria Francesca; Höbig, Nicole; Brunamonte, Fabio; Castelletti, Lanfredo; Tinner, Willy</p> <p>2017-04-01</p> <p>Combined pollen, charcoal and modeling evidence from the Insubria Region suggests that fire was a major driver of late Holocene vegetation change. However, the extent and timing of fire response dynamics are not clear yet. We use lacustrine sediments from Lago di <span class="hlt">Como</span> (N-Italy, S-Alps) to assess if the reconstructed vegetation and fire dynamics were relevant at large scales and if they coincided in time with those observed at smaller sites. The lake, due to its size (142 km2) and economic potential, was very attractive for early land use and human presence in this area is well documented since ca. 10,000 yrs ago (Mesolithic). We used pollen, plant macrofossils and charcoal to reconstruct the vegetation composition and fire activity. During the Younger Dryas and the Early Holocene until ca. 8000 cal BP natural dynamics prevailed. Subsequently, land use and slash-and-burn activities increased at the Mesolithic-Neolithic transition and became widespread around ca. 6500 cal BP. Microscopic charcoal and numerical analyses demonstrate that anthropogenic fires had a determinant influence on long-term vegetation dynamics at regional scales in Insubria. Microscopic charcoal and pollen and spores indicative of land use show that human pressure intensified after ca. 5300 cal yr BP and even more since ca. 4300 cal yr BP. Our results suggest that important species which disappeared or were strongly reduced by land use and fire (e.g. Abies alba, Tilia, Ulmus) will potentially reestablish in the Lago di <span class="hlt">Como</span> area and elsewhere in Insubria, if land abandonment initiated in the 1950s will continue.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25617535','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25617535"><span>Review of complementary feeding practices in Mexican children.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Pantoja-Mendoza, Itzayana Y; Meléndez, Guillermo; Guevara-Cruz, Martha; Serralde-Zúñiga, Aurora E</p> <p>2014-10-19</p> <p>Antecedentes: El inicio de la alimentación complementaria temprana coincide con un aumento significativo en la prevalencia de sobrepeso y obesidad especialmente en los niños, lo cual se debe entre otras causas a los cambios en los patrones de alimentación que se han experimentado. El objetivo del estudio fue describir las prácticas de alimentación complementaria en niños mexicanos. Métodos: Se realizó una búsqueda de los estudios que evaluaron las prácticas alimentarias en menores de 2 años en México en Medline, Lilacs y de forma manual con los siguientes términos: alimentación complementaria, alimentación suplementaria, México, ablactación y destete. Se recabó la edad de inicio de la alimentación complementaria, tipo de alimento consumido, frecuencia de consumo de los alimentos y motivo por el que iniciaban la alimentación complementaria. Se realizó un análisis cualitativo de la información recolectada y los datos en las gráficas son mostrados <span class="hlt">como</span> proporciones. Resultados: Se incluyeron 7 estudios que mostraron que los niños inician la alimentación complementaria antes de los 6 meses predominantemente con frutas, aunque también consumieron jugos industrializados, refrescos y frituras. El consumo de estos productos aumenta con el crecimiento de los niños, aunado a un bajo consumo de alimentos con proteína de alto valor biológico, especialmente las carnes rojas. Conclusiones: Los resultados de los estudios incluidos mostraron que los menores reciben alimentos con alta densidad energética, mientras que es bajo el consumo de aquellos que aportan proteína animal y <span class="hlt">hierro</span> en particular, lo que puede contribuir a <span class="hlt">problemas</span> de salud <span class="hlt">como</span> sobrepeso, obesidad, desnutrición y anemia.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27311799','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27311799"><span>An approach to personalized cell therapy in chronic complete paraplegia: The Puerta de <span class="hlt">Hierro</span> phase I/II clinical trial.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Vaquero, Jesús; Zurita, Mercedes; Rico, Miguel A; Bonilla, Celia; Aguayo, Concepcion; Montilla, Jesús; Bustamante, Salvador; Carballido, Joaquin; Marin, Esperanza; Martinez, Francisco; Parajon, Avelino; Fernandez, Cecilia; Reina, Laura De</p> <p>2016-08-01</p> <p>Cell transplantation in patients suffering spinal cord injury (SCI) is in its initial stages, but currently there is confusion about the results because of the disparity in the techniques used, the route of administration, and the criteria for selecting patients. We conducted a clinical trial involving 12 patients with complete and chronic paraplegia (average time of chronicity, 13.86 years; SD, 9.36). The characteristics of SCI in magnetic resonance imaging (MRI) were evaluated for a personalized local administration of expanded autologous bone marrow mesenchymal stromal cells (MSCs) supported in autologous plasma, with the number of MSCs ranging from 100 × 10(6) to 230 × 10(6). An additional 30 × 10(6) MSCs were administered 3 months later by lumbar puncture into the subarachnoid space. Outcomes were evaluated at 3, 6, 9 and 12 months after surgery through clinical, urodynamic, neurophysiological and neuroimaging studies. Cell transplantation is a safe procedure. All patients experienced improvement, primarily in sensitivity and sphincter control. Infralesional motor activity, according to clinical and neurophysiological studies, was obtained by more than 50% of the patients. Decreases in spasms and spasticity, and improved sexual function were also common findings. Clinical improvement seems to be dose-dependent but was not influenced by the chronicity of the SCI. Personalized cell therapy with MSCs is safe and leads to clear improvements in clinical aspects and quality of life for patients with complete and chronically established paraplegia. Copyright © 2016 International Society for Cellular Therapy. Published by Elsevier Inc. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016EGUGA..1813831T','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016EGUGA..1813831T"><span>Hydro-geochemical modeling of subalpine urbanized area: geochemical characterization of the shallow and deep aquifers of the urban district of <span class="hlt">Como</span> (first results).</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Terrana, Silvia; Brunamonte, Fabio; Frascoli, Francesca; Ferrario, Maria Francesca; Michetti, Alessandro Maria; Pozzi, Andrea; Gambillara, Roberto; Binda, Gilberto</p> <p>2016-04-01</p> <p>One of the greatest environmental and social-economics threats is climate change. This topic, in the next few years, will have a significant impact on the availability of water resources of many regions. This is compounded by the strong anthropization of water systems that shows an intensification of conflicts for water resource exploitation. Therefore, it is necessary a sustainable manage of natural resources thorough knowledge of the hosting territories. The development of investigation and data processing methods are essential to reduce costs for the suitable use and protection of resources. Identify a sample area for testing the best approach is crucial. This research aims to find a valid methodology for the characterization, modeling and management of subalpine urban aquifers, and the urban district of <span class="hlt">Como</span> appears perfect. The city of <span class="hlt">Como</span> is located at the southern end of the western sector of Lake <span class="hlt">Como</span> (N Italy). It is a coastal town, placed on a small alluvial plain, therefore in close communication with the lake. The plain is drained by two streams, which are presently artificially buried, and have an underground flow path in the urban section till the mouth. This city area, so, is suitable for this project as it is intensely urbanized, its dimensions is not too extensive and it is characterized by two aquifers very important and little known. These are a shallow aquifer and a deep aquifer, which are important not only for any water supply, but also for the stability of the ground subsidence in the city. This research is also the opportunity to work in a particular well-known area with high scientific significance; however, there is complete absence of information regarding the deep aquifer. Great importance has also the chosen and used of the more powerful open source software for this type of area, such as PHREEQC, EnvironInsite, PHREEQE etc., used for geological and geochemical data processing. The main goal of this preliminary work is the</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2009EnMan..44..695R','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2009EnMan..44..695R"><span>From Management to Negotiation: Technical and Institutional Innovations for Integrated Water Resource Management in the Upper <span class="hlt">Como</span>é River Basin, Burkina Faso</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Roncoli, Carla; Kirshen, Paul; Etkin, Derek; Sanon, Moussa; Somé, Léopold; Dembélé, Youssouf; Sanfo, Bienvenue J.; Zoungrana, Jacqueline; Hoogenboom, Gerrit</p> <p>2009-10-01</p> <p>This study focuses on the potential role of technical and institutional innovations for improving water management in a multi-user context in Burkina Faso. We focus on a system centered on three reservoirs that capture the waters of the Upper <span class="hlt">Como</span>é River Basin and servicing a diversity of users, including a sugar manufacturing company, a urban water supply utility, a farmer cooperative, and other downstream users. Due to variable and declining rainfall and expanding users’ needs, drastic fluctuations in water supply and demand occur during each dry season. A decision support tool was developed through participatory research to enable users to assess the impact of alternative release and diversion schedules on deficits faced by each user. The tool is meant to be applied in the context of consultative planning by a local user committee that has been created by a new national integrated water management policy. We contend that both solid science and good governance are instrumental in realizing efficient and equitable water management and adaptation to climate variability and change. But, while modeling tools and negotiation platforms may assist users in managing climate risk, they also introduce additional uncertainties into the deliberative process. It is therefore imperative to understand how these technological and institutional innovations frame water use issues and decisions to ensure that such framing is consistent with the goals of integrated water resource management.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.epa.gov/newsreleases/epa-se-mueve-hacia-la-prohibicion-de-desengrasantes-en-aerosol-y-quitamanchas-para','PESTICIDES'); return false;" href="https://www.epa.gov/newsreleases/epa-se-mueve-hacia-la-prohibicion-de-desengrasantes-en-aerosol-y-quitamanchas-para"><span>EPA se mueve hacia la prohibición de desengrasantes en aerosol y quitamanchas para lavado en seco <span class="hlt">como</span> una de las primeras acciones reglamentarias conforme a la ley reformada de sustancias químicas</span></a></p> <p><a target="_blank" href="http://www.epa.gov/pesticides/search.htm">EPA Pesticide Factsheets</a></p> <p></p> <p></p> <p>Comunicado de prensa de EPA: EPA se mueve hacia la prohibición de desengrasantes en aerosol y quitamanchas para lavado en seco <span class="hlt">como</span> una de las primeras acciones reglamentarias conforme a la ley reformada de sustancias químicas</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4452044','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4452044"><span>Detection and identification of pathogenic trypanosome species in tsetse flies along the <span class="hlt">Como</span>é River in Côte d’Ivoire</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Djohan, Vincent; Kaba, Dramane; Rayaissé, Jean-Baptiste; Dayo, Guiguigbaza-Kossigan; Coulibaly, Bamoro; Salou, Ernest; Dofini, Fabien; Kouadio, Alain De Marie Koffi; Menan, Hervé; Solano, Philippe</p> <p>2015-01-01</p> <p>In order to identify pathogenic trypanosomes responsible for African trypanosomiasis, and to better understand tsetse-trypanosome relationships, surveys were undertaken in three sites located in different eco-climatic areas in Côte d’Ivoire during the dry and rainy seasons. Tsetse flies were caught during five consecutive days using biconical traps, dissected and microscopically examined looking for trypanosome infection. Samples from infected flies were tested by PCR using specific primers for Trypanosoma brucei s.l., T. congolense savannah type, T. congolense forest type and T. vivax. Of 1941 tsetse flies caught including four species, i.e. Glossina palpalis palpalis, G. p. gambiensis, G. tachinoides and G. medicorum, 513 (26%) were dissected and 60 (12%) were found positive by microscopy. Up to 41% of the infections were due to T. congolense savannah type, 30% to T. vivax, 20% to T. congolense forest type and 9% due to T. brucei s.l. All four trypanosome species and subgroups were identified from G. tachinoides and G. p. palpalis, while only two were isolated from G. p. gambiensis (T. brucei s.l., T. congolense savannah type) and G. medicorum (T. congolense forest, savannah types). Mixed infections were found in 25% of cases and all involved T. congolense savannah type with another trypanosome species. The simultaneous occurrence of T. brucei s.l., and tsetse from the palpalis group may suggest that human trypanosomiasis can still be a constraint in these localities, while high rates of T. congolense and T. vivax in the area suggest a potential risk of animal trypanosomiasis in livestock along the <span class="hlt">Como</span>é River. PMID:26035296</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/21247101','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/21247101"><span>Density functional theory analysis of the interplay between Jahn-Teller instability, uniaxial magnetism, spin arrangement, metal-metal interaction, and spin-orbit coupling in Ca3<span class="hlt">CoMO</span>6 (M = Co, Rh, Ir).</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Zhang, Yuemei; Kan, Erjun; Xiang, Hongjun; Villesuzanne, Antoine; Whangbo, Myung-Hwan</p> <p>2011-03-07</p> <p>In the isostructural oxides Ca(3)<span class="hlt">CoMO</span>(6) (M = Co, Rh, Ir), the <span class="hlt">CoMO</span>(6) chains made up of face-sharing CoO(6) trigonal prisms and MO(6) octahedra are separated by Ca atoms. We analyzed the magnetic and electronic properties of these oxides on the basis of density functional theory calculations including on-site repulsion and spin-orbit coupling, and examined the essential one-electron pictures hidden behind results of these calculations. Our analysis reveals an intimate interplay between Jahn-Teller instability, uniaxial magnetism, spin arrangement, metal-metal interaction, and spin-orbit coupling in governing the magnetic and electronic properties of these oxides. These oxides undergo a Jahn-Teller distortion, but their distortions are weak, so that their trigonal-prism Co(n+) (n = 2, 3) ions still give rise to strong easy-axis anisotropy along the chain direction. As for the d-state split pattern of these ions, the electronic and magnetic properties of Ca(3)<span class="hlt">CoMO</span>(6) (M = Co, Rh, Ir) are consistent with d(0) < (d(2), d(-2)) < (d(1), d(-1)) but not with (d(2), d(-2)) < d(0) < (d(1), d(-1)). The trigonal-prism Co(3+) ion in Ca(3)Co(2)O(6) has the L = 2 configuration (d(0))(1)(d(2), d(-2))(3)(d(1), d(-1))(2) because of the metal-metal interaction between adjacent Co(3+) ions in each Co(2)O(6) chain, which is mediated by their z(2) orbitals, and the spin-orbit coupling of the trigonal-prism Co(3+) ion. The spins in each <span class="hlt">CoMO</span>(6) chain of Ca(3)<span class="hlt">CoMO</span>(6) prefer the ferromagnetic arrangement for M = Co and Rh but the antiferromagnetic arrangement for M = Ir. The octahedral M(4+) ion of Ca(3)<span class="hlt">CoMO</span>(6) has the (1a)(1)(1e)(4) configuration for M = Rh but the (1a)(2)(1e)(3) configuration for M = Ir, which arises from the difference in the spin-orbit coupling of the M(4+) ions and the Co···M metal-metal interactions.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28991274','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28991274"><span>Riesgos psicosociales y estrés <span class="hlt">como</span> predictores del burnout en médicos internos residentes en el Servicio de Urgencias.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Fernández-Prada, María; González-Cabrera, Joaquín; Iribar-Ibabe, Concepción; Peinado, José María</p> <p>2017-01-01</p> <p>Evaluar el estrés, los riesgos psicosociales asociados al puesto de trabajo y el burnout en un grupo de residentes en el servicio de urgencias; y analizar qué variables se relacionan y predicen mejor el burnout. Estudio analítico y transversal en el que han participado 42 médicos internos residentes que hacen guardias en el servicio de urgencias del Hospital Universitario San Cecilio, Granada. Se han utilizado la versión adaptada al español de la Perceived Stress Scale para evaluar el estrés, el Maslach Burnout Inventory (MBI) para valorar el desgaste profesional, y el cuestionario adaptado y baremado para la autoevaluación de riesgos psicosociales en el trabajo (CopSoQ-ISTAS21). El 78% de los residentes evaluados se encuentra en la categoría desfavorable o intermedia en todas las dimensiones del CopSoQ-ISTAS21, y destaca que el 90% presenta una puntuación desfavorable en exigencias psicológicas. Además, en el MBI el 45% presenta conjuntamente un alto agotamiento emocional y una elevada despersonalización. La dimensión de exigencias psicológicas del ISTAS21 (b = 0.393; p < 0.003) y las puntuaciones de estrés (b = 0.451; p < 0.001) predicen significativamente el agotamiento emocional (r(2) = 0.443). Por último, el 38% ha sufrido una amenaza/agresión en el servicio de urgencias. La situación de los residentes parece perjudicial para su desempeño profesional debido a los altos riesgos psicosociales asociados al puesto de trabajo. Las exigencias psicológicas se proponen <span class="hlt">como</span> un importante predictor del burnout. Se recomiendan intervenciones psicológicas y estructurales con las que mejorar la situación de los residentes que realizan guardias en el servicio de urgencias. To study the stress, the psychosocial risks associated to the job and the burnout, in a group of junior doctors working at the emergency ward; and to analyze what of those variables could predict and are better related with burnout. Cross-sectional study, with a sample of 42 junior</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.niddk.nih.gov/-/media/562066F366DA4742A6689835D8CC0785.ashx','NIH-MEDLINEPLUS'); return false;" href="https://www.niddk.nih.gov/-/media/562066F366DA4742A6689835D8CC0785.ashx"><span>Overactive Thyroid: What You Need to Know</span></a></p> <p><a target="_blank" href="http://medlineplus.gov/">MedlinePlus</a></p> <p></p> <p></p> <p>... o <span class="hlt">problemas</span> de tiroides, <span class="hlt">como</span> bocio • tiene una historia familiar de enfermedad tiroidea • tiene anemia perniciosa, una ... de los Estados Unidos. Esta publicación no tiene derechos de autor. El NIDDK otorga su permiso a ...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2792930','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2792930"><span>Percepción de competencia y adiestramiento profesional especializado relativos al VIH/SIDA en estudiantes y profesionales de la salud: el estigma <span class="hlt">como</span> un indicador de necesidad</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>RODRÍGUEZ, Yarimar ROSA; DÍAZ, Nelson VARAS</p> <p>2009-01-01</p> <p>El proceso de estigmatización asume una devaluación de la persona debido a una característica o marca que haya sido identificada socialmente y que permita que se le describa <span class="hlt">como</span> diferente. Desde que se desató la epidemia del VIH/SIDA, vivir con la enfermedad ha sido señalado de manera social <span class="hlt">como</span> una marca estigmatizante. Las manifestaciones de dicha estigmatización se han documentado entre profesionales de la salud. Este estigma puede afectar los servicios de salud que las personas que viven con VIH/SIDA reciben de estos profesionales. Los objetivos de esta investigación fueron explorar: 1) la percepción que tienen estudiantes y profesionales de la salud sobre su nivel de competencia para ofrecer servicios a personas que viven con VIH/SIDA, 2) las opiniones de éstos sobre el tipo de adiestramiento profesional recibido y la necesidad del mismo, y 3) la manifestación de actitudes estigmatizantes <span class="hlt">como</span> indicadores de necesidad de adiestramiento profesional. La muestra total del estudio estuvo compuesta por 80 de diversas profesiones de la salud. Los resultados reflejan que algunos/as de los/as participantes han recibido formación en VIH pero ésta no ha sido suficiente para contrarrestar las nociones estigmatizantes. Discutimos las implicaciones de los resultados para investigaciones futuras y el desarrollo de intervenciones con vías de minimizar las nociones estigmatizantes en los escenarios de salud. PMID:20011236</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26319853','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26319853"><span>[TEEN MOTHER AND NEWBORN NUTRITIONAL STATUS IN A GROUP OF TEENAGERS OF THE CITY OF MEDELLIN].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Restrepo-Mesa, Sandra Lucia; Zapata López, Natalia; Parra Sosa, Beatriz Elena; Escudero Vásquez, Luz Estela; Betancur Arrovaye, Laura</p> <p>2015-09-01</p> <p>Introducción: en los países en vía de desarrollo, entre ellos Colombia, el embarazo adolescente es un <span class="hlt">problema</span> de salud pública por sus consecuencias sociales, de salud y nutrición para el binomio madre-hijo. Objetivo: evaluar las características demográficas, socioeconómicas, de seguridad alimentaria, de salud y el estado nutricional en un grupo de gestantes adolescentes y sus recién nacidos. Métodos: se realizó un estudio analítico de corte transversal con 294 embarazadas adolescentes en el tercer trimestre de gestación del programa de control prenatal de la Red Pública Hospitalaria de Medellín-Colombia, durante 2011-2012. Se buscó la asociación del índice de masa corporal materno, estado nutritivo del <span class="hlt">hierro</span> y peso al nacer del neonato con variables explicativas. Resultados: los ingresos económicos mensuales inferiores a un salario mínimo se asociaron con bajo peso materno y con recién nacidos pequeños para la edad gestacional. El bajo peso gestacional se presentó en mayor proporción en las gestantes de 15 años o menos y con una edad ginecológica inferior a cinco años. La prevalencia de anemia fue baja en el primer trimestre y aumentó significativamente al final del embarazo; 90% presentaron reservas inadecuadas de <span class="hlt">hierro</span>. El bajo peso al nacer se asoció con la presencia de infecciones y el bajo peso materno en el tercer trimestre de gestación. Conclusión: la gestación adolescente es un <span class="hlt">problema</span> complejo que se asocia con efectos negativos en el estado nutricional, de salud y social de la mujer y su recién nacido.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_8");'>8</a></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li class="active"><span>10</span></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_10 --> <div id="page_11" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li class="active"><span>11</span></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="201"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2013RELEA..15...65D','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2013RELEA..15...65D"><span>The Astronomy Club of Araranguá: Educating Science Teachers as Science Communicators. (Breton Title: Clube de Astronomia de AraranguÁ: a Formação de Professores de Ciências <span class="hlt">Como</span> Divulgadores Científicos. ) Club de Astronomía de Araranguá: la Formación del Profesorado <span class="hlt">Como</span> Comunicadores de la Ciencia</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Damasio, Felipe; Allain, Olivier; Antunes Rodrigues, Adriano</p> <p>2013-07-01</p> <p>The study reported in this work takes place since 2009 at the Federal Institute of Education, Science and Technology of Santa Catarina, Campus Araranguá. Our main goal is to help form teachers, training undergraduate students in Natural Sciences with specialization in Physics as science communicators, as well as to promote actions of broader scientific popularization in the region of the town of Araranguá through an Astronomy Club called CA2. Among the actions of scientific popularization that the students promote are: video production, radio broadcasts, lectures, nightly observations, preparation and exhibition of posters, physics teaching for children, continuing education activities for teachers and regular physics teaching using Astronomy as a theme. The Club's teacher education and scientific dissemination work is based on the Theory of Meaningful Learning, always trying to reach the student's predisposition to learn and produce potentially meaningful material, the two essential conditions for meaningful learning to occur. O estudo que este trabalho relata ocorre desde 2009 no Instituto Federal de Educação, Ciência e Tecnologia de Santa Catarina, campus Araranguá. Nele procura-se formar divulgadores científicos durante a formação inicial de docentes do curso de Licenciatura em Ciências da Natureza com habilitação em Física, além de promover ações de divulgação científica para o público geral da região da cidade de Araranguá por meio de um Clube de Astronomia chamado CA² (Clube de Astronomia de Araranguá). Entre as ações de divulgação científica que os licenciandos promovem estão: produção de vídeos, programas de rádio, palestras, observações noturnas, confecção e exposição de pôsteres, ensino de física para crianças, formação continuada de professores em atividades e ensino de Física regular utilizando a Astronomia <span class="hlt">como</span> tema gerador. O trabalho de formação docente e divulgação científica do Clube fundamenta</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/832509','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/832509"><span>Evolution of sensitivity to fosfomycin in bacteria isolated in 1973, 1974 and 1975 in the Servicio de Microbiologia y Epidemiologia of the 'Clinica Puerta de <span class="hlt">Hierro</span>', Madrid.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Dámaso, D; Moreno-López, M; Martínez-Beltrán, J</p> <p>1977-01-01</p> <p>The bacteriostatic activity of fosfomycin was studied in vitro against 1,243 clinical isolations of gram-positive cocci and 4,086 isolations of gram-negative bacilli that were obtained in 1973, 1974 and in the period from January to May of 1975. MIC was determined by the agar diffusion method, quantifying it by means of the standard curve that was worked out with the strain of E. coli NCTC 10,418. A slight increase in resistance was observed in the gram-positive cocci: 64 mug/ml were inhibitory for 63% of the 249 isolations obtained in 1973, 59.1% of the 716 isolations obtained in 1974, and 57.5% of the 278 isolations from 1975. A slight loss of sensitivity was also observed in the gram-negative bacilli: the aforementioned concentration of fosfomycin inhibited 36% of the 742 isolations from 1973, 33.6% of the 2,387 isolations from 1974 and 32.6% of the 957 isolations from 1975. 933 g of this antibiotic were consumed in our hospital in 1973, 4,203 g in 1974 and 957 g in 1975. The consumption rate per patient per year was 0.15, 0.72 and 0.20 g, respectively. In conclusion, although no change was observed in the sensitivity of some bacterial strains to fosfomycin, the overall study indicates a slight decrease in the sensitivity, although it does not apparently have any relationship to the consumption of fosfomycin in our hospital.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ars.usda.gov/research/publications/publication/?seqNo115=229662','TEKTRAN'); return false;" href="http://www.ars.usda.gov/research/publications/publication/?seqNo115=229662"><span>Micoinseticidas e Micoacaricidas no Brasil: <span class="hlt">Como</span> estamos?</span></a></p> <p><a target="_blank" href="https://www.ars.usda.gov/research/publications/find-a-publication/">USDA-ARS?s Scientific Manuscript database</a></p> <p></p> <p></p> <p>Mycoinsecticides and mycoacaricides can be defined as biopesticide products based on living propagules of entomopathogenic fungi developed for inundative and inoculative biological control of insects and mites. Based on recently published data on global use of entomopathogenic fungi and a proposal f...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016BAAA...58..246B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016BAAA...58..246B"><span>Magnetares <span class="hlt">como</span> fuentes para potenciar supernovas superluminosas</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Bersten, M. C.; Benvenuto, O. G.</p> <p>2016-08-01</p> <p>Magnetars have been proposed as one of the possible sources to power the light curve of super-luminous supernovae. We have included the energy deposited by a hypothetical magnetar in our one-dimensional hydrodynamical code, and analyzed the dynamical effect on the supernova ejecta. In particular, we present a model for SN 2011kl, the first object associated with a ultra-long-duration gamma-ray burst. Finally, we show its effect on the light curves of hydrogen rich supernovae.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://pubs.usgs.gov/ds/2006/211/','USGSPUBS'); return false;" href="https://pubs.usgs.gov/ds/2006/211/"><span>Particle-associated contaminants in street dust, parking lot dust, soil, lake-bottom sediment, and suspended and streambed sediment, Lake <span class="hlt">Como</span> and Fosdic Lake watersheds, Fort Worth, Texas, 2004</span></a></p> <p><a target="_blank" href="http://pubs.er.usgs.gov/pubs/index.jsp?view=adv">USGS Publications Warehouse</a></p> <p>Wilson, Jennifer T.; Van Metre, Peter C.; Werth, Charles J.; Yang, Yanning</p> <p>2006-01-01</p> <p>A previous study by the U.S. Geological Survey of impaired water bodies in Fort Worth, Texas, reported elevated but variable concentrations of particle-associated contaminants (PACs) comprising chlorinated hydrocarbons, polycyclic aromatic hydrocarbons, and trace elements in suspended and bed sediment of lakes and streams affected by urban land use. The U.S. Geological Survey, in cooperation with the City of Fort Worth, collected additional samples during October 2004 to investigate sources of PACs in the watersheds of two impaired lakes: Lake <span class="hlt">Como</span> and Fosdic Lake. Source materials and aquatic sediment were sampled and analyzed for PACs. Source materials sampled consisted of street dust and soil from areas with residential and commercial land use and parking lot dust from sealed and unsealed parking lots. Aquatic sediment sampled consisted of bottom-sediment cores from the two lakes and suspended and streambed sediment from the influent stream of each lake. Samples were analyzed for chlorinated hydrocarbons (organochlorine pesticides and polychlorinated biphenyls), polycyclic aromatic hydrocarbons, major and trace elements, organic carbon, grain size, and radionuclides.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED455977.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED455977.pdf"><span>Colonias: Problems and Promise. Desperate Situations, Local Innovations = Colonias: <span class="hlt">Problemas</span> y Promesa. Situaciones Dificiles, Innovaciones Locales.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Borderlines, 1998</p> <p>1998-01-01</p> <p>Colonias--unincorporated, low-income settlements endemic to the U.S. borderlands--have inadequate infrastructure and dismal living conditions, but also provide a creative solution to the housing dilemma faced by many border families. Colonias are most common in Texas and New Mexico, primarily as a result of weak rural planning laws, and are…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED118644.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED118644.pdf"><span>Solucion de <span class="hlt">Problemas</span> y Procesos Cognoscitivos (Problem Solving and Cognitive Processes). Publication No. 41.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Rimoldi, Horacio J. A.</p> <p></p> <p>The study of problem solving is made through the analysis of the process that leads to the final answer. The type of information obtained through the study of the process is compared with the information obtained by studying the final answer. The experimental technique used permits to identify the sequence of questions (tactics) that subjects ask…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1986PIAGM.152.....R','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1986PIAGM.152.....R"><span>Tratamiento canonico del <span class="hlt">problema</span> de Poincaré. Movimiento del polo.</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Romero, P.; Sevilla, M. J.</p> <p></p> <p>The rotational motion for a rigid Earth model with a homogeneous liquid core has been obtained using Hamilton's equations. From the canonical equations for the precessional und nutational motions in an inertial frame, the corresponding equations in an Earth fixed frame are deduced. The linearized equations obtained for polar motion and liquid core motion are equivalent to the Moritz's equations (1980).</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2016BAAA...58....5L','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2016BAAA...58....5L"><span>Mesa redonda: Materia oscura vs. gravitación alternativa. Aciertos y <span class="hlt">problemas</span> de ambos paradigmas</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Landau, S. J.</p> <p>2016-08-01</p> <p>The dark matter paradigm was proposed in 1933 to try to explain the behavior of the rotation curves of galaxies and clusters. Subsequently, other explanations based on modifications to the current theory of gravitation were proposed. This article briefly describes both proposals, highlighting the successes and problems in each case. In the case of dark matter, the main problem is not detecting it in terrestrial experiments. On the other hand, the alternative theories of gravity couldn't explain the data from the cosmic background radiation and the large-scale structure observed in galaxy surveys.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25993503','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25993503"><span>Integrated control of Chagas disease for its elimination as public health <span class="hlt">problem--a</span> review.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Sosa-Estani, Sergio; Segura, Elsa Leonor</p> <p>2015-05-01</p> <p>Chagas disease or American trypanosomiasis is, together with geohelminths, the neglected disease that causes more loss of years of healthy life due to disability in Latin America. Chagas disease, as determined by the factors and determinants, shows that different contexts require different actions, preventing new cases or reducing the burden of disease. Control strategies must combine two general courses of action including prevention of transmission to prevent the occurrence of new cases (these measures are cost effective), as well as opportune diagnosis and treatment of infected individuals in order to prevent the clinical evolution of the disease and to allow them to recuperate their health. All actions should be implemented as fully as possible and with an integrated way, to maximise the impact. Chagas disease cannot be eradicated due because of the demonstrated existence of infected wild triatomines in permanent contact with domestic cycles and it contributes to the occurrence of at least few new cases. However, it is possible to interrupt the transmission of Trypanosoma cruzi in a large territory and to eliminate Chagas disease as a public health problem with a dramatic reduction of burden of the disease.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED202686.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED202686.pdf"><span>El Ruido: Un <span class="hlt">Problema</span> para la Salud (Noise: A Health Problem).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Environmental Protection Agency, Washington, DC. Office of Noise Abatement and Control.</p> <p></p> <p>This booklet contains nine sections describing ways in which noise may endanger health and well-being. Sections are included on: (1) hearing loss; (2) heart disease; (3) other reactions by the body; (4) effects on the unborn; (5) special effects on children; (6) intrusion at home and work; (7) mental and social well-being; and (8) danger to life…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1987RMxAA..14..639B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1987RMxAA..14..639B"><span>Sobre Algumas Tecnicas de Perturbacao Utilizadas no <span class="hlt">Problema</span> Ressonante 3/1</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Balthazar, J. M.; Sagnier, J. L.; Ferraz Mello, S.; Koiller, J.; Yokoyama, T.</p> <p>1987-05-01</p> <p>ABSTRACT. This work concerns with the study of a particular 3/1 resonant problem for which we have determined formal solutions according to the model belonging to the domain of the Restricted Elliptic Problem of Three Bodies. Key & : ASTEROIDS</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=problemas+OR+distribucion&pg=2&id=ED400184','ERIC'); return false;" href="http://eric.ed.gov/?q=problemas+OR+distribucion&pg=2&id=ED400184"><span>101 Short Problems from EQUALS = 101 <span class="hlt">Problemas</span> Cortos del programma EQUALS.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Stenmark, Jean Kerr, Ed.</p> <p></p> <p>EQUALS is a teacher advisory program that helps elementary and secondary educators acquire methods and materials to attract minority and female students to mathematics. The program supports a problem-solving approach to mathematics, including having students working in groups, using active assessment methods, and incorporating a broad mathematics…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=problemas+OR+distribucion&pg=3&id=EJ137665','ERIC'); return false;" href="http://eric.ed.gov/?q=problemas+OR+distribucion&pg=3&id=EJ137665"><span>Educational Policy and the Drug <span class="hlt">Problem--A</span> Redistributive Politics Issue</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Caliguri, Joseph P.</p> <p>1975-01-01</p> <p>The drug problem exists as a cluster of problems affecting broad interests or groups. The issues are redistributive in that everything relates to everything else. It seems apparent that a cluster of policies and programs need development as well as genuine citizen participation in the formulation of these policies. (Author)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=Problemas+OR+drogas&pg=3&id=EJ137665','ERIC'); return false;" href="https://eric.ed.gov/?q=Problemas+OR+drogas&pg=3&id=EJ137665"><span>Educational Policy and the Drug <span class="hlt">Problem--A</span> Redistributive Politics Issue</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Caliguri, Joseph P.</p> <p>1975-01-01</p> <p>The drug problem exists as a cluster of problems affecting broad interests or groups. The issues are redistributive in that everything relates to everything else. It seems apparent that a cluster of policies and programs need development as well as genuine citizen participation in the formulation of these policies. (Author)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=Problemas+OR+drogas&pg=3&id=ED400184','ERIC'); return false;" href="https://eric.ed.gov/?q=Problemas+OR+drogas&pg=3&id=ED400184"><span>101 Short Problems from EQUALS = 101 <span class="hlt">Problemas</span> Cortos del programma EQUALS.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Stenmark, Jean Kerr, Ed.</p> <p></p> <p>EQUALS is a teacher advisory program that helps elementary and secondary educators acquire methods and materials to attract minority and female students to mathematics. The program supports a problem-solving approach to mathematics, including having students working in groups, using active assessment methods, and incorporating a broad mathematics…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2009GeCar..35..110S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2009GeCar..35..110S"><span>Tiesioginio matomumo <span class="hlt">problema</span> ženklinant Lietuvos Respublikos valstybės sieną</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Sližienė, Gražina</p> <p>2009-01-01</p> <p>Lietuvos Respublikos valstybės sienai, ypač išorinės Europos Sąjungos sienos daliai, efektyviai apsaugoti ir eksploatuoti svarbu, kad tarp gretimų sienos ženklų būtų tiesioginis matomumas. Dažniausiai matomumas priklauso nuo vietovės reljefo, atstumo tarp ženklų, augalijos iš pasienio juostos pašalinimo. Atstumus tarp sienos ženklų lemia delimituotos (redelimituotos) sienos posūkio ta\\vskų išdėstymas, konkrečios fizinės-geografinės sąlygos, tarpvalstybiniai susitarimai. Lietuva, ženklindama valstybės sieną su Latvija, Baltarusija ir Lenkija, susidūrė su skirtingais tiesioginio matomumo problemos sprendimo būdais. Vienu atveju buvo įrengiami tarpiniai sienos ženklai, perkeliami jau įtvirtinti sienos ženklai arba net nukasamos kalvų viršūnės, kitu atveju - niveliuojamos sienos atkarpos, sudaromi sienos linijos profiliai ir, atsižvelgiant į vietovės reljefą, projektuojami nauji sienos ženklai. Demarkuojant Lietuvos ir Rusijos valstybių sieną, ši patirtis leis pasirinkti racionaliausią problemos sprendimo būdą.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=Historia&pg=3&id=EJ116093','ERIC'); return false;" href="http://eric.ed.gov/?q=Historia&pg=3&id=EJ116093"><span>La historia de la Literatura: sus <span class="hlt">problemas</span> y methodos (The History of Literature: Problems and Methods)</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Dopico, Blanca</p> <p>1975-01-01</p> <p>In order to achieve its goals, the study of literary history should follow a "programmed process." Such a process would help solve problems in the following areas: bibliography, text criticism, interpretation and explanation, dates and chronology, authenticity, source and origin etc. (Text is in Spanish.) (DS)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=literatura&pg=2&id=EJ116093','ERIC'); return false;" href="https://eric.ed.gov/?q=literatura&pg=2&id=EJ116093"><span>La historia de la Literatura: sus <span class="hlt">problemas</span> y methodos (The History of Literature: Problems and Methods)</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Dopico, Blanca</p> <p>1975-01-01</p> <p>In order to achieve its goals, the study of literary history should follow a "programmed process." Such a process would help solve problems in the following areas: bibliography, text criticism, interpretation and explanation, dates and chronology, authenticity, source and origin etc. (Text is in Spanish.) (DS)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28611728','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28611728"><span>Are Movement Artifacts in Magnetic Resonance Imaging a Real <span class="hlt">Problem?-A</span> Narrative Review.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Havsteen, Inger; Ohlhues, Anders; Madsen, Kristoffer H; Nybing, Janus Damm; Christensen, Hanne; Christensen, Anders</p> <p>2017-01-01</p> <p>Movement artifacts compromise image quality and may interfere with interpretation, especially in magnetic resonance imaging (MRI) applications with low signal-to-noise ratio such as functional MRI or diffusion tensor imaging, and when imaging small lesions. High image resolution has high sensitivity to motion artifacts and often prolongs scan time that again aggravates movement artifacts. During the scan fast imaging techniques and sequences, optimal receiver coils, careful patient positioning, and instruction may minimize movement artifacts. Physiological noise sources are motion from respiration, flow and pulse coupled to cardiac cycles, from the swallowing reflex and small spontaneous head movements. Par example, in resting-state functional MRI spontaneous neuronal activity adds 1-2% of signal change, even under optimal conditions signal contributions from physiological noise remain a considerable fraction hereof. Movement tracking during imaging may allow for prospective correction or postprocessing steps separating signal and noise.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_9");'>9</a></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li class="active"><span>11</span></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_11 --> <div id="page_12" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li class="active"><span>12</span></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="221"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25238851','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25238851"><span>[Nutrition and child development I; nutritional status of school children in a peripheral district of Madrid (Rev Clin Esp 1944; XII:87-94)].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Grande Covián, F; Rof Carballo, J; Jiménez García, F; Morata Cernuda, A</p> <p>2014-09-01</p> <p>El estudio clínico del estado nutritivo de un grupo de niños en edad escolar, habitantes de un suburbio madrileño revela la existencia, relativamente rara, de signos carenciales específicos, que contrasta vivamente con el considerable retraso que se observa en su desarrollo somático. Los hechos parecen demostrar que el <span class="hlt">problema</span> nutritivo de estos niños es sobre todo un <span class="hlt">problema</span> cuantitativo. El retraso de la evolución está en relación con la insuficiencia global de la dieta y con el déficit de calcio que es probablemente el elemento individual con mayor grado de carencia en las dietas. La anemia que presenta el 98% de los niños no parece deberse únicamente a una deficiencia de <span class="hlt">hierro</span> porque la dieta parece tener una cantidad adecuada; probablemente esté más en relación con el exiguo contenido de proteínas animales de la ración.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2014RELEA..17...39D','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2014RELEA..17...39D"><span>Essays on Eclipses, Transits and Occultations as Teaching Tools in the Introductory Astronomy College Course. (Spanish Title: Ensayos sobre Eclipses, Tránsitos y Ocultaciones <span class="hlt">Como</span> Herramientas de Enseñanza en el Curso Universitario Introductorio a la Astronomía.) Ensaios sobre Eclipses, Trânsitos e Ocultações <span class="hlt">Como</span> Ferramentas de Ensino em um Curso Universitário Introdutório de Astromomia</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Dcruz, Noella L.</p> <p>2014-07-01</p> <p> estudiantes que escribieran dos ensayos cortos de tres que se proponían. Los ensayos contenían partes descriptivas y conceptuales. Los mismos estaban destinados a servir <span class="hlt">como</span> herramientas de enseñanza. 62% de los 106 ensayos de 55 estudiantes obtuvo grados A, B o C. 21% de los 47 encuestados que respondieron al cuestionario posterior consideró que los ensayos aumentaron su interés por la astronomía. 49% de los encuestados consideró que los ensayos no eran educacionalmente útiles y que no deben ser propuestos de nuevo. Las respuestas escritas más comunes a nuestra encuesta indicaran que los estudiantes necesitan más orientación y una mejor preparación en la redacción de ensayos exitosos. Dado que los estudiantes encontraron las piezas conceptuales de los ensayos difíciles, en el futuro vamos a ofrecer actividades pertinentes antes de los plazos de redacción para ayudar a los estudiantes a crear ensayos de mayor calidad. Nós ocasionalmente incluímos projetos em nosso curso universitário introdutório centrado no aluno para permitir aos estudantes que pertencem às carreiras não científicas explorar alguns conceitos astronômicos em mais detalhes do que o normal. Tais projetos também enfatizam eventos astronômicos em curso ou futuros. Esperamos que os alunos se sintam mais interessados na astronomia através de projetos ligados a eventos astronômicos. No termo de Primavera de 2012 (EUA), propomos ensaios curtos focados em eclipses, trânsitos e ocultações para promover o raro trânsito de Vênus que ocorreu no dia 5 de junho de 2012. Pedimos aos alunos que escrevessem dois ensaios curtos dentre três que foram propostos. Os ensaios continham partes descritivas e conceituais. Eles foram feitos para servir <span class="hlt">como</span> ferramentas de ensino. 62% de 106 ensaios de 55 alunos ganhou graus A, B ou C. 21% dos 47 entrevistados que responderam ao levantamento posterior sentiu que os ensaios aumentaram seu interesse na astronomia. 49% dos inquiridos consideraram que os</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27439487','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27439487"><span>[The mind-brain problem (II): about consciousness].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Tirapu-Ustarroz, J; Goni-Saez, F</p> <p>2016-08-16</p> <p>Introduccion. La conciencia es el resultado de una serie de procesos neurobiologicos en el cerebro y a su vez es un rasgo del nivel de su complejidad. En realidad, el estar y el ser consciente nos situan ante lo que Chalmers ha denominado el '<span class="hlt">problema</span> blando' y el '<span class="hlt">problema</span> duro' de la conciencia. El primero hace referencia a aspectos <span class="hlt">como</span> la vigilia, la atencion o el conocimiento, y el segundo a conceptos tan complejos <span class="hlt">como</span> autoconciencia, 'yo neural' o cognicion social. En este sentido se puede afirmar que el concepto de conciencia <span class="hlt">como</span> algo unitario plantea <span class="hlt">problemas</span> de acercamiento a una realidad sumamente compleja. Desarrollo. Planteamos los principales modelos que desde una perspectiva neurocientifica han abordado el tema de la conciencia. Por un lado, los modelos de experiencia consciente de Crick, Edelman y Tononi, y Llinas, y por otro, los modelos y las bases neuronales de la autoconciencia de autores <span class="hlt">como</span> Damasio (conciencia central y extendida), Tulving (conciencia autonoetica, noetica y cronestesia), el <span class="hlt">problema</span> de los qualia (Dennett, Popper, Ramachandran) y el modelo de los cognitos (Fuster). Conclusiones. Todos los estimulos que recibimos del mundo externo y de nuestro mundo interno son convertidos y tratados por el cerebro para integrarlos y que formen parte de nuestra identidad. Desde la percepcion de un perro y reconocerlo <span class="hlt">como</span> tal hasta la comprension de la propia conciencia responden al funcionamiento de estructuras cerebrales, neuronas y sinapsis. Ahora bien, los procesos mas complejos de la conciencia, <span class="hlt">como</span> la autoconciencia o la empatia, son probablemente procesos emergentes del cerebro.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27238780','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27238780"><span>[In Process Citation].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Wang, Bingsong; Li, Yijun; Wu, Xiaolu; Liu, Qingqing; Tang, Xue; Wang, Zuo</p> <p>2016-03-25</p> <p>Objetivos: oligoelementos <span class="hlt">como</span> zinc (Zn), <span class="hlt">hierro</span> (Fe) y cobre (Cu) tienen una influencia significativa en el mantenimiento de la función inmune y del metabolismo normales; modulan la función immune e influyen en la susceptibilidad del organismo ante infecciones. Pero la relación entre trazas de estos elementos y la bronconeumonía resultó incierta. Métodos: en este estudio fueron incluidos 28 niños con bronconeumonía y 46 niños sanos agrupados por edad. Se determinaron los niveles de Zn, Cu, Fe, calcio (Ca) y/o magnesio (Mg) en el suero de los niños con bronconeumonía y sin ella mediante espectrofotometría de absorción atómica. Resultados: los resultados muestran que varios niveles de microelementos <span class="hlt">como</span> Zn, Ca, Mg y Fe en el grupo con bronconeumonía son menores que en el grupo control. En el grupo de niños con bronconeumonía el nivel de Ca en el suero está asociado positivamente con el zinc (Zn) (p < 0,05) y el <span class="hlt">hierro</span> (Fe) (p < 0,05), mientras que hay una correlación positiva entre el cobre (Cu) y el calcio (Ca) (p < 0,05), magnesio (mg) (p < 0,05). Conclusión: el nivel de oligoelemento en el suero puede estar asociado con el riesgo de bronconeumonía entre los niños.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.dtic.mil/docs/citations/ADA482696','DTIC-ST'); return false;" href="http://www.dtic.mil/docs/citations/ADA482696"><span>Measuring the Behavior and Response to Sound of Beaked Whales Using Recording Tags</span></a></p> <p><a target="_blank" href="http://www.dtic.mil/">DTIC Science & Technology</a></p> <p></p> <p>2004-01-01</p> <p>led by Alberto Brito of the University of La Laguna. His team of biology graduate students maintain a field station in the island of El <span class="hlt">Hierro</span> ...in the Canary Island field site of El <span class="hlt">Hierro</span> (Figs. 3, 4). In analyzing identification photos, the Italian group have confirmed sightings of several...specie. The exceptional sighting rate of both species in El <span class="hlt">Hierro</span> makes this one of the densest coastal populations of beaked whales known</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.dtic.mil/docs/citations/ADA480993','DTIC-ST'); return false;" href="http://www.dtic.mil/docs/citations/ADA480993"><span>Acoustic Detection, Behavior, and Habitat Use of Deep-Diving Odontocetes</span></a></p> <p><a target="_blank" href="http://www.dtic.mil/">DTIC Science & Technology</a></p> <p></p> <p>2007-01-01</p> <p>Blainville’s beaked whale, Mesoplodon densirostris, and Cuvier’s beaked whale, Ziphius cavirostris, off the island of El <span class="hlt">Hierro</span> in the Canary Islands...vocalizations to compare with the buoy recordings. We will also continue a seasonal photo-identification study of the El <span class="hlt">Hierro</span> beaked whales to build... <span class="hlt">Hierro</span> ), and April 2008 (pilot whales in Tenerife). Due to the late arrival of funds, we opted for a short field season with beaked whales in</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=contenido&id=EJ129536','ERIC'); return false;" href="http://eric.ed.gov/?q=contenido&id=EJ129536"><span>Los <span class="hlt">problemas</span> de contenido y de empleo del verbo haber (Problems of Meaning and Use of the Verb "Haber.")</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Perez Botero, Luis A.</p> <p>1975-01-01</p> <p>Discusses the derivation, meaning and both past and present uses of the Spanish verb "haber." The verb refers to relationships of possession, duration and existence, and is used as an auxiliary. Extant derivative forms of the verb in other languages and earlier Spanish meanings are noted. (Text is in Spanish.) (CHK)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2012PhDT.......284R','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2012PhDT.......284R"><span>Aportes del Aprendizaje Basado en <span class="hlt">Problemas</span> (ABP) en la ensenanza de la Fisiologia Animal en un programa de Zootecnia</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Reinartz-Estrada, Monica</p> <p></p> <p>Based on difficulties observed on the subject of technical-scientific conceptualization and the integration of theory and practice in learning animal physiology for students in the Animal Science program at the National University of Colombia in Medellin, this research paper proposes a problem-based learning strategy founded on the method of Problem Based Learning (PBL), applied specifically to the issues of thermoregulation and physiological stress in domestic animals. In this case study, a sample size of eight students was presented with a pedagogical problem during the first session that would then be solved during the course. In order to evaluate the process, three surveys were conducted called Level Test Formulations (NF) performed at different times of the trial: one before beginning the topic (NF 1), one after three theoretical classes had been given and before beginning the fieldwork (NF 2), and another one after the end of the process (NF 3). Finally, individual interviews were conducted with each student to know the students' perceptions regarding the method. The information obtained was subjected to a qualitative analysis and categorization, using the QDA Miner program which reviewed and coded texts from the surveys and individual interviews, supplemented in turn, by field observation, analyzing the conceptual change, the theory-practice relationship and the correlation between the variables and categories established. Among the main results obtained, it should be noted that following the implementation of PBL in this Animal Physiology course, support for conceptual change was demonstrated and the formulated problem served as a connector between theory and practice. Moreover, there was a fusion of prior knowledge with newly acquired knowledge, meaningful learning, improvement in the level of conceptualization and an increase in the scientificness of definitions; it also led to problem-solving and overcoming epistemological obstacles such as multidisciplinarity and nonlinearity. As a result of this research, it is recommended that this method be evaluated in other topics related to Animal Physiology, in other sciences, in larger sample sizes, as well as to address the issue of evaluation applied directly to this method. Key words: Problem Based Learning (PBL), conceptual change, integration of theory and practice, significatif learning, animal physiology, thermoregulation, physiological stress.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=psicologia&id=ED199279','ERIC'); return false;" href="https://eric.ed.gov/?q=psicologia&id=ED199279"><span>Decision e Informacion en Solucion de <span class="hlt">Problemas</span>. Publicacion No. 77 (Information and Decision Making in Problem Solving. Publication No. 77).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Rimoldi, Horacio J. A.; And Others</p> <p></p> <p>A technique using information and decision-making theories to evaluate problem solving tactics is presented. In problem solving, the process of solution is evaluated by investigating the questions that the subject doing the problem solving asks. The sequence of questions asked is called a tactic. It is assumed that: (1) tactics are the observable…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/EJ244023.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/EJ244023.pdf"><span>Temas y <span class="hlt">problemas</span> del idioma espanol en la prensa (Spanish Language Topics and Problems in the Press).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>El Brocense; And Others</p> <p>1980-01-01</p> <p>This section consists of reprints on the following topics: (1) the misuse of "en"; (2) anglicisms; (3) widespread use of vulgar language; (4) an interview with Emilio Criado on Spanish language variation; (5) use of the feminine in professional titles; and (6) Spanish, the national language of Latin American countries. (AMH)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=problemas+OR+distribucion&pg=4&id=EJ387362','ERIC'); return false;" href="http://eric.ed.gov/?q=problemas+OR+distribucion&pg=4&id=EJ387362"><span>Espanol mexicano y espanol chicano: <span class="hlt">Problemas</span> y propuestas fundamentales (Mexican Spanish and Chicano Spanish: Fundamental Problems and Proposals).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Hidalgo, Margarita</p> <p>1987-01-01</p> <p>Discusses the rise of Mexican Spanish as a distinct variety of Spanish and describes the regional and social dialects of contemporary Mexican Spanish. Although countless similarities exist between Mexican Spanish and the Chicano Spanish spoken in the southwestern United States, Mexican Spanish shows greater variability. (GR)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED019756.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED019756.pdf"><span>REASSESSMENT OF THE SCHOOL LOCATION <span class="hlt">PROBLEM--A</span> MULTI-FUNCTIONAL ROLE FOR THE SCHOOL IN THE URBAN ENVIRONMENT.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>DOST, JEANNE</p> <p></p> <p>RISING PRESSURES OF COMPETITION FOR LAND IN URBAN AREAS SUGGEST THE NEED FOR NOVEL APPROACHES TO PLANNING PUBLIC LAND USE FOR FOSTERING HIGHER LEVELS OF LIVING DESIRABILITY OF THE URBAN ENVIRONMENT. EMPIRICAL INVESTIGATIONS IN BOTH ECONOMIC AND NON-ECONOMIC DISCIPLINES SERVE AS THE BASIS FOR A BROADER CONCEPT OF THE URBAN SCHOOL LOCATION PROBLEM.…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/EJ116211.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/EJ116211.pdf"><span>Delimitacion de las Zonas Dialectales de Mexico: Objetivos y <span class="hlt">Problemas</span> (Delimitation of Dialect Zones in Mexico: Objectives and Problems)</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Blanch, Juan M. Lope</p> <p>1975-01-01</p> <p>Before creating a linguistic map of Mexican dialects, it is necessary to determine the dialect regions of the country. An extensive questionnaire must be written and distributed to collect data from a representative sample of the population for an accurate picture of the language. (CK) (Text in Spanish.)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28092710','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28092710"><span>[Sobre la (No) Responsabilidad de la Tecnociencia en los <span class="hlt">Problemas</span> Ambientales y la Búsqueda de Política].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Martínez Barrera, Jorge</p> <p>2016-01-01</p> <p>In this paper I propose to reflect upon modern configuration of technique, i.e., technoscience, and our responsibility towards environmental management. I show that the technological products of our world imply a certain attitude of aggression towards nature, contrasting with the attitude of protection from her, which was peculiar of the pre-technological world. Finally I suggest recovering the classical notion of politics as a possible alternative for controlling techno-scientific imperatives.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=linguistica&pg=4&id=ED061801','ERIC'); return false;" href="https://eric.ed.gov/?q=linguistica&pg=4&id=ED061801"><span>Una formalizacion tentativa del <span class="hlt">problema</span> de la barrera linguistica (A Tentative Formalization of the Problem of Linguistic Barriers).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Zierer, Ernesto</p> <p>1971-01-01</p> <p>The formulas presented in this paper provide the means for showing the ease with which scientific information can be passed from one language into another. The formulas are based on several factors. The linguistic barrier can be measured to illustrate the relative degree of difference between two languages based on a comparison of vocabulary,…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=Problemas+OR+drogas&pg=4&id=EJ387362','ERIC'); return false;" href="https://eric.ed.gov/?q=Problemas+OR+drogas&pg=4&id=EJ387362"><span>Espanol mexicano y espanol chicano: <span class="hlt">Problemas</span> y propuestas fundamentales (Mexican Spanish and Chicano Spanish: Fundamental Problems and Proposals).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Hidalgo, Margarita</p> <p>1987-01-01</p> <p>Discusses the rise of Mexican Spanish as a distinct variety of Spanish and describes the regional and social dialects of contemporary Mexican Spanish. Although countless similarities exist between Mexican Spanish and the Chicano Spanish spoken in the southwestern United States, Mexican Spanish shows greater variability. (GR)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=Problemas+OR+drogas&pg=4&id=EJ244023','ERIC'); return false;" href="https://eric.ed.gov/?q=Problemas+OR+drogas&pg=4&id=EJ244023"><span>Temas y <span class="hlt">problemas</span> del idioma espanol en la prensa (Spanish Language Topics and Problems in the Press).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>El Brocense; And Others</p> <p>1980-01-01</p> <p>This section consists of reprints on the following topics: (1) the misuse of "en"; (2) anglicisms; (3) widespread use of vulgar language; (4) an interview with Emilio Criado on Spanish language variation; (5) use of the feminine in professional titles; and (6) Spanish, the national language of Latin American countries. (AMH)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=Contenido&id=EJ129536','ERIC'); return false;" href="https://eric.ed.gov/?q=Contenido&id=EJ129536"><span>Los <span class="hlt">problemas</span> de contenido y de empleo del verbo haber (Problems of Meaning and Use of the Verb "Haber.")</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Perez Botero, Luis A.</p> <p>1975-01-01</p> <p>Discusses the derivation, meaning and both past and present uses of the Spanish verb "haber." The verb refers to relationships of possession, duration and existence, and is used as an auxiliary. Extant derivative forms of the verb in other languages and earlier Spanish meanings are noted. (Text is in Spanish.) (CHK)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=linguistica&pg=4&id=ED061801','ERIC'); return false;" href="http://eric.ed.gov/?q=linguistica&pg=4&id=ED061801"><span>Una formalizacion tentativa del <span class="hlt">problema</span> de la barrera linguistica (A Tentative Formalization of the Problem of Linguistic Barriers).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Zierer, Ernesto</p> <p>1971-01-01</p> <p>The formulas presented in this paper provide the means for showing the ease with which scientific information can be passed from one language into another. The formulas are based on several factors. The linguistic barrier can be measured to illustrate the relative degree of difference between two languages based on a comparison of vocabulary,…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=objetivos&id=EJ116211','ERIC'); return false;" href="https://eric.ed.gov/?q=objetivos&id=EJ116211"><span>Delimitacion de las Zonas Dialectales de Mexico: Objetivos y <span class="hlt">Problemas</span> (Delimitation of Dialect Zones in Mexico: Objectives and Problems)</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Blanch, Juan M. Lope</p> <p>1975-01-01</p> <p>Before creating a linguistic map of Mexican dialects, it is necessary to determine the dialect regions of the country. An extensive questionnaire must be written and distributed to collect data from a representative sample of the population for an accurate picture of the language. (CK) (Text in Spanish.)</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_10");'>10</a></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li class="active"><span>12</span></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_12 --> <div id="page_13" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li class="active"><span>13</span></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="241"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=psicologia&id=ED199279','ERIC'); return false;" href="http://eric.ed.gov/?q=psicologia&id=ED199279"><span>Decision e Informacion en Solucion de <span class="hlt">Problemas</span>. Publicacion No. 77 (Information and Decision Making in Problem Solving. Publication No. 77).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Rimoldi, Horacio J. A.; And Others</p> <p></p> <p>A technique using information and decision-making theories to evaluate problem solving tactics is presented. In problem solving, the process of solution is evaluated by investigating the questions that the subject doing the problem solving asks. The sequence of questions asked is called a tactic. It is assumed that: (1) tactics are the observable…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/20001706','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/20001706"><span>Fröhlich's coherent excitations & the cancer <span class="hlt">problem--a</span> retrospective overview of his guiding philosophy.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Hyland, G J</p> <p>2009-01-01</p> <p>The guiding philosophy underlying Fröhlich's approach to biology from the side of theoretical physics is summarized, and illustrated, in the context of his prediction of (dynamic) coherent excitations in living systems, based on their dielectric and elastic properties, and far-from-equilibrium (nonlinear) character. His envisaged role of these coherent excitations in cell division and its control is outlined, together with the associated implications for cancer--as understood both at the time of his work and subsequently.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2017BAAA...59...40D','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2017BAAA...59...40D"><span>PSR J1417-4402: no tan misterioso <span class="hlt">como</span> parece</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>De Vito, M. A.; Benvenuto, O. G.; Horvath, J. E.</p> <p>2017-10-01</p> <p>PSR J1417-4402 was detected when the binary system to which it belongs switched from an X-ray source to a pulsar state. The characteristic parameters of this binary system put it out of the Redback family, in which some of their members experienced such a change. This behaviour was not expected in this kind of systems. However, it is a natural result in the frame of our close binary systems models with irradiation feedback. We present a possible progenitor to this system.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=plan+AND+vida&id=ED298416','ERIC'); return false;" href="https://eric.ed.gov/?q=plan+AND+vida&id=ED298416"><span><span class="hlt">Como</span> Planear Mi Vida = Make a Life for Yourself.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Haffner, Debra; Casey, Sean</p> <p></p> <p>This booklet for teenagers about life planning is presented in parallel English and Spanish versions with a special focus on young Hispanics growing up in America. It discusses hopes and dreams that adolescents may have and gives tips for reaching goals. A sentence completion exercise is included to help readers set goals. Four important goals for…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=plan+AND+vida&id=ED339983','ERIC'); return false;" href="https://eric.ed.gov/?q=plan+AND+vida&id=ED339983"><span>Make a Life for Yourself = <span class="hlt">Como</span> Planear Mi Vida.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Center for Population Options, Washington, DC.</p> <p></p> <p>This booklet was devised to help Hispanic teenagers develop a life plan. It provides information for making decisions, and is written in both English and Spanish. Tips are provided for setting goals. A sentence-completion task helps the teenager focus on specific issues, and use concrete language when talking about the goals. Specific goals are…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3987294','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3987294"><span><span class="hlt">Como</span> Lo Hago Yo: Tratamiento Quirurgico Del Mielomeningocele</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Portillo, Santiago</p> <p>2014-01-01</p> <p>En Argentina hay plan de fortificación con ácido fólico. Diagnostico prenatal no siempre es correcto. Cierre según técnica. Cerramos músculo. No favorecemos corpectomía temprana en casos de cifosis. Suturamos la plaqueta. Cerramos el plano muscular. Hidrocefalia: Válvula de derivación, generalmente dentro de los dos primeros meses. Ventriculostomía no está indicada. Chiari II. Laminectomia cervical alta. Siringomielia: Derivación desde la cavidad al peritoneo. PMID:24791219</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED468642.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED468642.pdf"><span>Los colegios <span class="hlt">como</span> comunidades (Schools as Communities). ERIC Digest.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Royal, Mark A.; Rossi, Robert J.</p> <p></p> <p>A good deal of evidence now suggests that a strong sense of community in schools has benefits for both staff members and students, while providing a necessary foundation for school improvement. This digest in Spanish provides an overview of the literature on schools as communities. The digest identifies the elements of community schools, the…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=idiomas&pg=2&id=EJ175810','ERIC'); return false;" href="http://eric.ed.gov/?q=idiomas&pg=2&id=EJ175810"><span>El Espanol <span class="hlt">como</span> Idioma Universal (Spanish as a Universal Language)</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Mijares, Jose</p> <p>1977-01-01</p> <p>A proposal to transform Spanish into a universal language because it possesses the prerequisites: it is a living language, spoken in several countries; it is a natural language; and it uses the ordinary alphabet. Details on simplification and standardization are given. (Text is in Spanish.) (AMH)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2017AAS...22934724D','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2017AAS...22934724D"><span>Cosmic Web of Galaxies in the <span class="hlt">COMOS</span> Field</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Darvish, Behnam; Martin, Christopher D.; Mobasher, Bahram; Scoville, Nicholas; Sobral, David; COSMOS science Team</p> <p>2017-01-01</p> <p>We use a mass complete sample of galaxies with accurate photometric redshifts in the COSMOS field to estimate the density field and to extract the components of the cosmic web. The comic web extraction algorithm relies on the signs and the ratio of eigenvalues of the Hessian matrix and is enable to integrate the density field into clusters, filaments and the field. We show that at z < 0.8, the median star-formation rate in the cosmic web gradually declines from the field to clusters and this decline is especially sharp for satellite galaxies (~1 dex vs. ~0.4 dex for centrals). However, at z > 0.8, the trend flattens out. For star-forming galaxies only, the median star-formation rate declines by ~ 0.3-0.4 dex from the field to clusters for both satellites and centrals, only at z < 0.5. We argue that for satellite galaxies, the main role of the cosmic web environment is to control their star-forming/quiescent fraction, whereas for centrals, it is mainly to control their overall star-formation rate. Given these, we suggest that most satellite galaxies experience a rapid quenching mechanism as they fall from the field into clusters through the channel of filaments, whereas for central galaxies, it is mostly due to a slow quenching process. Our preliminary results highlight the importance of the large-scale cosmic web on the evolution of galaxies.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2003BAAA...46...34B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2003BAAA...46...34B"><span>Líneas UV <span class="hlt">como</span> indicadores de temperatura y densidad</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Brusasco, M. A.; Cidale, L. S.</p> <p></p> <p>In order to investigate the behavior of Fe II lines in Be stars, we carry out a statistical analysis over a sample of IUE images. We found that only 4 of the 39 studied stars (with spectral types B2, B5 and B8) show Fe II lines. Synthetic spectra of Fe II lines were computed by means of a rigorous treatment of the line transfer equation for moving flows, considering different effective temperature, velocity and temperature structure. Preliminary results show that the shape of the profiles depends mainly on the velocity structure, while the intensity changes with both the temperature and the density structure.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1997ascu.conf...87M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1997ascu.conf...87M"><span>Los mitos <span class="hlt">como</span> memoria colectiva de Los Pueblos.</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Martín, P. T.</p> <p></p> <p>Myths are essentially something practical that allows those who believe in them to solve any ambiguity which could come up in their relation with nature. Since they bring information about the condition of the reality to which they belong, they are but the appropriate instrument to insert nature into culture by actually achieving an adaptation to the environment. The purpose of this essay is to show how the deification of plants, animals, and stars, which are present in the daily lives of "Amerindian" people, not only constitutes a source of rich mythology but also turns out to be an effective measure towards the continuity of social groups. Similarities or identifications between human life and the life of plants, animals and stars as well as mutual interplay are somehow present in those myths: stars which create or are changed into human being, animals or plants; human beings who create or are transformed into astral bodies; battles between peoples and stars, etc. On this base, mythology can provide not only keys to show how certain human groups have achieved their adaptation to the environment and how the different social systems and their relations to nature have developed, but also hints of changes which have taken place in other heavenly spheres such as the falling of meteors, the appearance of comets or any other significant events of this kind in the lives of these groups.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=Plan+AND+vida&id=ED298416','ERIC'); return false;" href="http://eric.ed.gov/?q=Plan+AND+vida&id=ED298416"><span><span class="hlt">Como</span> Planear Mi Vida = Make a Life for Yourself.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Haffner, Debra; Casey, Sean</p> <p></p> <p>This booklet for teenagers about life planning is presented in parallel English and Spanish versions with a special focus on young Hispanics growing up in America. It discusses hopes and dreams that adolescents may have and gives tips for reaching goals. A sentence completion exercise is included to help readers set goals. Four important goals for…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=Plan+AND+vida&id=ED339983','ERIC'); return false;" href="http://eric.ed.gov/?q=Plan+AND+vida&id=ED339983"><span>Make a Life for Yourself = <span class="hlt">Como</span> Planear Mi Vida.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Center for Population Options, Washington, DC.</p> <p></p> <p>This booklet was devised to help Hispanic teenagers develop a life plan. It provides information for making decisions, and is written in both English and Spanish. Tips are provided for setting goals. A sentence-completion task helps the teenager focus on specific issues, and use concrete language when talking about the goals. Specific goals are…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=espanol&pg=7&id=EJ175810','ERIC'); return false;" href="https://eric.ed.gov/?q=espanol&pg=7&id=EJ175810"><span>El Espanol <span class="hlt">como</span> Idioma Universal (Spanish as a Universal Language)</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Mijares, Jose</p> <p>1977-01-01</p> <p>A proposal to transform Spanish into a universal language because it possesses the prerequisites: it is a living language, spoken in several countries; it is a natural language; and it uses the ordinary alphabet. Details on simplification and standardization are given. (Text is in Spanish.) (AMH)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED462727.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED462727.pdf"><span>Understanding Your Child's Learning Differences = Entienda <span class="hlt">como</span> aprende su hijo.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Fielding, Elizabeth N.</p> <p></p> <p>Children who are bright and hard-working, yet find school a struggle, or children who can discuss things they have learned but whose written work is of surprisingly poor quality, might have learning differences that are hindering them from reaching their full potential. Some children are visual learners, others are auditory learners, and others…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5553201','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5553201"><span>Número de ganglios linfáticos metastásicos <span class="hlt">como</span> determinante de los resultados después de prostatectomía radical de rescate para el cáncer de próstata de radiación recurrente</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Gugliemetti, G; Sukhu, R; Conca Baenas, M A.; Meeks, J; Sjoberg, D D.; Eastham, J A.; Scardino, P T.; Touijer, K</p> <p>2017-01-01</p> <p>Resumen Antecedentes La presencia de metástasis en los ganglios linfáticos (MGL) en la prostatectomía radical de rescate (PRs) se asocia con un mal pronóstico. Los factores predictivos de resultados en este contexto siguen siendo indeterminados. El objetivo fue evaluar el papel de número de ganglios linfáticos positivos sobre el resultado de los pacientes con MGL después de PRs y para el cáncer de próstata de radio-recurrente. Material y métodos Se analizaron los datos de una cohorte consecutiva de 215 hombres tratados con PRr en una sola institución. Se utilizaron los modelos de regresión de riesgos proporcionales de Cox univariante para la recurrencia bioquímica (RBQ) y los resultados metastásicos, con el antígeno prostático específico, la puntuación de Gleason, la extensión extraprostática, la invasión de vesículas seminales, el tiempo entre la terapia de radiación y PRr y el número de ganglios positivos <span class="hlt">como</span> factores predictivos. Resultados De los 47 pacientes con MGL, 37 desarrollaron RBQ, 11 desarrollaron metástasis a distancia y 4 fallecieron con una mediana de seguimiento de 2,3 años para los supervivientes. El riesgo de metástasis aumentó con mayores niveles preoperatorios de PSA (HR 1,19 por 1 ng/ml; IC del 95%: 1,06, 1,34; p = 0,003). Los factores predictivos restantes no alcanzaron niveles convencionales de significación. Sin embargo, la eliminación de 3 o más ganglios linfáticos positivos demostró una asociación positiva, <span class="hlt">como</span> se esperaba, con enfermedad metastásica (HR 3,44, IC: 0,91, 13,05; p = 0,069) en comparación con uno o dos ganglios positivos. Del mismo modo, la presencia de extensión extraprostática, invasión de vesículas seminales y grado de Gleason superior a 7 también demostraron una asociación positiva con un mayor riesgo de metástasis, con índices de riesgo de 3,97 (IC del 95% 0,50; 31,4; p = 0,2), 3,72 (IC 95% 0,80, 17,26; p = 0,1) y 1,45 (IC del 95% 0,44, 4,76; p = 0,5), respectivamente</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.dtic.mil/docs/citations/ADA482208','DTIC-ST'); return false;" href="http://www.dtic.mil/docs/citations/ADA482208"><span>Current Collapse Induced in AlGaN/GaN High-Electron-Mobility Transistors by Bias Stress</span></a></p> <p><a target="_blank" href="http://www.dtic.mil/">DTIC Science & Technology</a></p> <p></p> <p>2003-08-25</p> <p>structure where the traps causing current collapse can be passivated by forming H-defect complexes. <span class="hlt">Hierro</span> et al.7 have shown, for example, that deep...Lett. 75, 4016 ~1999!. 7 A. <span class="hlt">Hierro</span> , S. A. Ringel, M. Hansen, J. S. Speck, U. K. Mishra, and S. P. DenBaars, Appl. Phys. Lett. 77, 1499 ~2000!. 8 S. J</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.dtic.mil/docs/citations/ADA441195','DTIC-ST'); return false;" href="http://www.dtic.mil/docs/citations/ADA441195"><span>Development and Field testing of the DTAG for Deep-Diving Odontocetes</span></a></p> <p><a target="_blank" href="http://www.dtic.mil/">DTIC Science & Technology</a></p> <p></p> <p>2005-01-12</p> <p>34Resident and reproductive populations of beaked whales in El <span class="hlt">Hierro</span> , Canary Islands", European Research on Cetaceans 19th, France, April 2005. Aguilar... <span class="hlt">Hierro</span> (Canary Islands)", European Research on Cetaceans 18th, Sweden, 2004. Tregenza N.J.C., Johnson M., Aguilar de Soto N., "Automated detection of</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28000910','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28000910"><span>[Environmental and genetic variables related with alterations in language acquisition in early childhood].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Moriano-Gutierrez, A; Colomer-Revuelta, J; Sanjuan, J; Carot-Sierra, J M</p> <p>2017-01-01</p> <p>Introduccion. Los <span class="hlt">problemas</span> en la correcta adquisicion del lenguaje se han estudiado mucho, pero con escasas conclusiones globales; a ello contribuye la variabilidad individual, la existencia de diferentes medidas para evaluar el lenguaje y a que en su desarrollo participa una compleja red de factores geneticos y ambientales. Objetivo. Revisar las variables ambientales y geneticas que se han investigado hasta la actualidad, para comprender mejor las causas de los trastornos especificos del lenguaje y crear nuevas evidencias que faciliten la elaboracion de sistemas de deteccion precoz de estos trastornos. Desarrollo. Dentro de las variables ambientales relacionadas con peor desarrollo en el lenguaje infantil estan el sexo masculino, un nivel educacional maternal bajo, una historia familiar de <span class="hlt">problemas</span> en el lenguaje o <span class="hlt">problemas</span> psiquiatricos, los <span class="hlt">problemas</span> perinatales y los <span class="hlt">problemas</span> de salud en la infancia. El bilinguismo parece ser un factor protector. El temperamento y el lenguaje tienen relacion. Dentro de los factores geneticos existen ya varios genes especificos asociados con el lenguaje, dos de ellos con una influencia mayor en su adquisicion fisiologica: FOXP2 y CNTNAP2. Los otros genes mas relacionados con trastornos especificos del lenguaje son ATP2C2, CMIP, ROBO2, ZNF277 y NOP9. Conclusiones. La clave para entender el desarrollo de los trastornos especificos del lenguaje radica en llegar a comprender el verdadero papel que desempeñan los genes en la ontogenia, regulando los diferentes procesos de desarrollo y <span class="hlt">como</span> este papel se ve modulado por el ambiente.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1996BAAA...40R..17C','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1996BAAA...40R..17C"><span>Entropía de la información: una herramienta útil</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Cincotta, P.</p> <p></p> <p>En este trabajo se presenta una muy breve introducción al concepto de Entropía de la Información y se muestran distintas aplicaciones de una misma técnica para estudiar <span class="hlt">problemas</span> tan variados <span class="hlt">como</span> la determinación de periodicidad en una serie de tiempo arbitraria o de estimar el grado de caoticidad de una trayectoria en un sistema dinámico de N grados de libertad.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_11");'>11</a></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li class="active"><span>13</span></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_13 --> <div id="page_14" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li class="active"><span>14</span></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="261"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.dtic.mil/docs/citations/ADA593654','DTIC-ST'); return false;" href="http://www.dtic.mil/docs/citations/ADA593654"><span>Photoionization Spectroscopy of Deep Defects Responsible for Current Collapse in Nitride-Based Field Effect Transistors</span></a></p> <p><a target="_blank" href="http://www.dtic.mil/">DTIC Science & Technology</a></p> <p></p> <p>2003-10-24</p> <p>are quite similar to the results of photocapacitance measurements of MOCVD-grown p+–n and n-type GaN Schottky diodes reported by <span class="hlt">Hierro</span> et al [28...defect by <span class="hlt">Hierro</span> et al, while the 3.22 eV threshold was identified as an unintentional shallow acceptor, such as Mg or C, in agreement with the...transition is associated with the photoneutralization of residual ionized shallow acceptors in the GaN layer, as explained in section 4.1. <span class="hlt">Hierro</span> et</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.dtic.mil/docs/citations/ADA260807','DTIC-ST'); return false;" href="http://www.dtic.mil/docs/citations/ADA260807"><span>Numerical Simulations of Columbus’ Atlantic Crossings</span></a></p> <p><a target="_blank" href="http://www.dtic.mil/">DTIC Science & Technology</a></p> <p></p> <p>1992-02-01</p> <p><span class="hlt">Hierro</span> , around 27.7°N, so he must have thought he sailed almost due westward. One can argue that the 1.70 difference in latitude between his 26°N and the...36 27.7*N of <span class="hlt">Hierro</span> is just about equal to the 1.50 difference between the north coast of Hispanola and Grand Turk. If Columbus really first landed...Spain to the Indies circa 1533 and says to navigate from <span class="hlt">Hierro</span> one should sail 800 leagues on course W by SW (258 3/40) to arrive at LaDeseada, Guadalupe</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=lenguaje&pg=6&id=EJ175813','ERIC'); return false;" href="http://eric.ed.gov/?q=lenguaje&pg=6&id=EJ175813"><span><span class="hlt">Problemas</span> del Lenguaje Espanol en la Prensa: El Castellano, Esta Lengua Enferma (Problems of the Spanish Language in the Press: Castillian, That Closed-In Language)</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Quijada, Carlos Alonso</p> <p>1977-01-01</p> <p>Learned academies deplore the deterioration of Castillian Spanish due to foreign contamination. They ignore the real source of the problem within Spain itself where everyone speaks the language badly except those in the remote towns and a few intellectuals. A ray of hope comes from the Americans. (Text is in Spanish.) (AMH)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=lenguaje&pg=6&id=EJ219641','ERIC'); return false;" href="http://eric.ed.gov/?q=lenguaje&pg=6&id=EJ219641"><span>Temas y <span class="hlt">Problemas</span> del idioma espanol en la prensa: El lenguaje, arma peligrosa (Themes and Problems of the Spanish Language in the Press: Language, a Dangerous Weapon).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>de Senillosa, Antonio</p> <p>1979-01-01</p> <p>Discusses the important role that language has in our society and compares human communication to animal group communication. Gives specific examples of corruption in the Spanish language today. (NCR)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=padres+AND+escuela&pg=3&id=ED222298','ERIC'); return false;" href="https://eric.ed.gov/?q=padres+AND+escuela&pg=3&id=ED222298"><span>Hablando Con Maestros Guia para Padres para Resolver <span class="hlt">Problemas</span> Con La Escuela = Talking With Teachers: A Problem-Solving Handbook for Parents.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Mata, Roberto L.</p> <p></p> <p>Designed to help parents communicate with teachers about the school problems of their children, the handbook provides strategies which can guide parents to collect accurate information about a problem and to use it to initiate an open exchange with the teacher. The strategies can be used whether parents are becoming aware of a problem or have been…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2006BAAA...49...66L','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2006BAAA...49...66L"><span>Mapas dinamicos de trayectorias rapidas para un valor dado de la constante de Jacobi en el <span class="hlt">problema</span> de tres cuerpos restringido Tierra-Luna</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Leiva, A. M.; Briozzo, C. M.</p> <p></p> <p>Starting from the numerical integration of 1736649 trajectories we study the behaviour of 783209 trajectories in the Earth-Moon Circular Restricted Three Body Problem, for a value h=-1.5887 of the Jacobi constant. Many of these trajectories are of great interest because they take place between the primary masses for times shorter than 217 days and show close approaches to the Moon. On a surface of section we show dynamical maps which provide a global description of the main features of these trajectories, and show the optimal regions to search for periodic orbits and for orbits colliding with the Moon. FULL TEXT IN SPANISH</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=desarrollo&pg=6&id=ED157382','ERIC'); return false;" href="http://eric.ed.gov/?q=desarrollo&pg=6&id=ED157382"><span>El <span class="hlt">problema</span> de la barrera linguistica en el desarrollo cientifico y tecnologico (The Problem of the Language Barrier in Scientific and Technological Development).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Zierer, Ernesto</p> <p></p> <p>This monograph discusses the problem of the language barrier in scientific and technological development in terms of several parameters describing the flow of scientific information from one language to another. The numerical values of the language barrier parameters of the model are calculated in the field of information on second language…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=problemas+OR+distribucion&pg=4&id=ED222298','ERIC'); return false;" href="http://eric.ed.gov/?q=problemas+OR+distribucion&pg=4&id=ED222298"><span>Hablando Con Maestros Guia para Padres para Resolver <span class="hlt">Problemas</span> Con La Escuela = Talking With Teachers: A Problem-Solving Handbook for Parents.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Mata, Roberto L.</p> <p></p> <p>Designed to help parents communicate with teachers about the school problems of their children, the handbook provides strategies which can guide parents to collect accurate information about a problem and to use it to initiate an open exchange with the teacher. The strategies can be used whether parents are becoming aware of a problem or have been…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=problemas+OR+distribucion&pg=4&id=EJ373763','ERIC'); return false;" href="http://eric.ed.gov/?q=problemas+OR+distribucion&pg=4&id=EJ373763"><span>Adolescent Illiteracy: What Libraries Can Do to Solve the <span class="hlt">Problem--A</span> Report on the Research of the Project on Adolescent Illiteracy.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Davidson, Judith</p> <p>1988-01-01</p> <p>Describes characteristics of effective adolescent literacy programs and discusses the role of the public library. Library collections for adolescents with literacy needs and the professionals who work with them, referral to literacy programs, library sponsored programs, and staff development are identified as areas that public libraries need to…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED368584.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED368584.pdf"><span>Hacia Una Pedagogia de Solucion de <span class="hlt">Problemas</span> en La Educacion Ambiental. Serie Educacion Ambiental 15 (Pedagogy of Solutions and Problems in Environmental Education. Environmental Education Series 15.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>United Nations Educational, Scientific, and Cultural Organization, Santiago (Chile). Regional Office for Education in Latin America and the Caribbean.</p> <p></p> <p>This document discusses the teaching of problem solving in environmental education. From an interdisciplinary viewpoint, this study describes some strategies for teaching that can favor the practice of educational activities oriented toward solving the concrete problems of the surrounding environment. The volume is divided into seven chapters. The…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=lenguaje&pg=6&id=EJ219641','ERIC'); return false;" href="https://eric.ed.gov/?q=lenguaje&pg=6&id=EJ219641"><span>Temas y <span class="hlt">Problemas</span> del idioma espanol en la prensa: El lenguaje, arma peligrosa (Themes and Problems of the Spanish Language in the Press: Language, a Dangerous Weapon).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>de Senillosa, Antonio</p> <p>1979-01-01</p> <p>Discusses the important role that language has in our society and compares human communication to animal group communication. Gives specific examples of corruption in the Spanish language today. (NCR)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=lenguaje&pg=6&id=EJ175813','ERIC'); return false;" href="https://eric.ed.gov/?q=lenguaje&pg=6&id=EJ175813"><span><span class="hlt">Problemas</span> del Lenguaje Espanol en la Prensa: El Castellano, Esta Lengua Enferma (Problems of the Spanish Language in the Press: Castillian, That Closed-In Language)</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Quijada, Carlos Alonso</p> <p>1977-01-01</p> <p>Learned academies deplore the deterioration of Castillian Spanish due to foreign contamination. They ignore the real source of the problem within Spain itself where everyone speaks the language badly except those in the remote towns and a few intellectuals. A ray of hope comes from the Americans. (Text is in Spanish.) (AMH)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=linguistica&pg=4&id=ED157382','ERIC'); return false;" href="https://eric.ed.gov/?q=linguistica&pg=4&id=ED157382"><span>El <span class="hlt">problema</span> de la barrera linguistica en el desarrollo cientifico y tecnologico (The Problem of the Language Barrier in Scientific and Technological Development).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Zierer, Ernesto</p> <p></p> <p>This monograph discusses the problem of the language barrier in scientific and technological development in terms of several parameters describing the flow of scientific information from one language to another. The numerical values of the language barrier parameters of the model are calculated in the field of information on second language…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=Problemas+OR+drogas&pg=5&id=EJ373763','ERIC'); return false;" href="https://eric.ed.gov/?q=Problemas+OR+drogas&pg=5&id=EJ373763"><span>Adolescent Illiteracy: What Libraries Can Do to Solve the <span class="hlt">Problem--A</span> Report on the Research of the Project on Adolescent Illiteracy.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Davidson, Judith</p> <p>1988-01-01</p> <p>Describes characteristics of effective adolescent literacy programs and discusses the role of the public library. Library collections for adolescents with literacy needs and the professionals who work with them, referral to literacy programs, library sponsored programs, and staff development are identified as areas that public libraries need to…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2001IAIss..26....7D','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2001IAIss..26....7D"><span>Datirovka zvezdnogo kataloga Ptolemeya po sobstvennym dvizheniyam: tysyacheletnyaya <span class="hlt">problema</span> reshena %t Dating Ptolemy's star catalogue based on proper motions: the thousand-year-old problem solved</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Dambis, A. K.; Efremov, Yu. N.</p> <p></p> <p>The thousand-year-old problem of the origin of the star catalogue included in Ptolemy's "Almagest" is considered. The dilemma whether stellar coordinates were based on Hipparchus' or Ptolemy's observations has arisen long ago, because the 1 degree error in ecliptic longitudes may be explained either by Ptolemy's error in the initial longitudes of the Sun, or by the fact that Ptolemy adopted the original Hipparchus' coordinates and transformed them to a 265-year later epoch using an erroneous constant for precession. In fact, only indirect evidence for the Hipparchan origin of most of the coordinates was available so far, and most specialists considered the issue still to be resolved. We have successfully applied a new approach based on stellar proper motions. The time-dependent mutual distances in the configurations including 8 fast stars yield an epoch of -53 ± 130 B.C., whereas the bulk method based on an analysis of the Almagest minus computed coordinate differences for 40 fastest stars yields an epoch of -90 ± 120 B.C. Standard errors in the ancient ecliptic longitudes and latitudes are found to be σ(λcosβ) = 18' and σβ = 13', respectively. It is concluded that the stellar coordinates in the Almagest catalogue were observed during Hipparchus' lifetime and that Ptolemy's authorship claim can be rejected at a 94% significance level. Ptolemy's assertion that "we observed as many stars as we could sight down to the sixth magnitude" might simply imply that he found each star of the original catalogue to be near its position in the sky given by Hipparchus, and then adopted Hipparchus' coordinates as measured by a more skilled observer.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27064913','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27064913"><span>[Subjective memory complaints, perceived stress and coping strategies in young adults].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Molina-Rodriguez, Sergio; Pellicer-Porcar, Olga; Mirete-Fructuoso, Marcos; Martinez-Amoros, Estefanía</p> <p>2016-04-16</p> <p>Introduccion. Las quejas subjetivas de memoria son cada vez mas frecuentes entre los adultos jovenes. En la actualidad, no existe bibliografia que analice la relacion entre las quejas de memoria, el estres percibido y las estrategias de afrontamiento de forma conjunta en adultos jovenes. Objetivo. Determinar la contribucion del estres percibido y diferentes estrategias de afrontamiento sobre las quejas subjetivas de memoria en adultos jovenes sanos. Sujetos y metodos. La muestra estuvo compuesta por 299 universitarios, el 71,6% mujeres, con una edad media de 22,54 ± 4,73 años. La variable 'quejas de memoria' se midio con el cuestionario de fallos de memoria; la variable 'estres percibido', con la escala de estres percibido, y las variables referidas a estrategias de afrontamiento, con el inventario de estrategias de afrontamiento. Resultados. Las variables que presentan una mayor aportacion a la varianza de las quejas de memoria son, en primer lugar, estres percibido y estrategias de afrontamiento positivas centradas en el <span class="hlt">problema</span>, y, en segundo lugar, estrategias de afrontamiento negativas centradas en la emocion y en el <span class="hlt">problema</span>. Las estrategias de afrontamiento positivas centradas en la emocion presentan una aportacion nula. Conclusion. Una vez mas se evidencia la influencia del estres sobre los procesos de memoria. El empleo de estrategias de afrontamiento positivas centradas en el <span class="hlt">problema</span>, <span class="hlt">como</span> la reestructuracion cognitiva y la resolucion de <span class="hlt">problemas</span>, puede resultar beneficioso para atenuar la presencia de quejas de memoria, y es necesario realizar una mayor investigacion al respecto.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1998BAAA...42...22P','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1998BAAA...42...22P"><span>Relación masa-radio para estrellas enanas blancas y la interpretación de recientes mediciones hechas por Hipparcos</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Panei, J. A.; Althaus, L. G.; Benvenuto, O. G.</p> <p></p> <p>Recientes mediciones de la masa y el radio hechas por Hipparcos de las estrellas enanas blancas 40 Eri B y Procyon B (Shipman, H. & Provencal, J. - ApJ. 1998, 494, 759), sugieren un núcleo compuesto de <span class="hlt">hierro</span> para dichas estrellas, en lugar de carbono y oxígeno <span class="hlt">como</span> predice la teoría standard de evolución estelar. Para interpretar estas observaciones, presentamos aquí, relaciones masa-radio para configuraciones degeneradas a temperatura finita para distintas composiciones químicas centrales. Para tal fin hemos calculado secuencias evolutivas de enanas blancas utilizando el código de evolución estelar, desarrollado en el Observatorio de La Plata. Dicho código resuelve las ecuaciones de estructura y evolución estelar mediante la técnica de relajación de Henyey, y esta basado en una descripción física muy detallada y actualizada.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED112361.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED112361.pdf"><span><span class="hlt">Como</span> ayudar a su hijo a aprender a leer ingles <span class="hlt">como</span> segunda lengua. (How Can I Help My Child Learn to Read English as a Second Language.)</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Garcia, Ricardo L.; Deyoe, Rita Maxine</p> <p></p> <p>Suggestions for ways in which parents can help their children learn to read English are contained in this short booklet written in Spanish. Activities to be performed in the home, such as listening to and talking to the child in any language, reading aloud, reading for oneself, obtaining books for the home, and organizing study time for the child,…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27600738','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27600738"><span>[Prefrontal Symptoms Inventory (PSI): ecological validity and convergence with neuropsychological measures].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Pedrero-Perez, E J; Ruiz-Sanchez de Leon, J M; Rojo-Mota, G; Morales-Alonso, S; Pedrero-Aguilar, J; Lorenzo, I; Gonzalez, A</p> <p>2016-09-16</p> <p>Introduccion. El inventario de sintomas prefrontales (ISP) es un cuestionario autoinformado creado en España que interroga sobre alteraciones cognitivas, emocionales y comportamentales en las actividades de la vida diaria y que resulta aplicable tanto en poblacion general <span class="hlt">como</span> en multiples poblaciones clinicas. Existe una version abreviada de 20 items (ISP-20) con excelentes propiedades psicometricas para el cribado. Objetivo. Estudiar la validez convergente y divergente del ISP e ISP-20, analizando <span class="hlt">como</span> sus escalas reflejan las consecuencias cotidianas de deficits reales hallados en evaluacion neuropsicologica mediante pruebas de ejecucion. Pacientes y metodos. Se estudiaron 52 personas con adiccion a sustancias en tratamiento (31 varones y 21 mujeres) a las que se administro el ISP junto con una bateria de exploracion neuropsicologica abreviada centrada en describir procesos atencionales, mnemicos y ejecutivos. Resultados. Ambas versiones del ISP presentan optimas propiedades psicometricas (0,78 > alfa > 0,94 para la version completa de 46 items y 0,7 > alfa > 0,89 para la version abreviada de 20 items). Los resultados confirman las hipotesis sobre su validez: la escala de <span class="hlt">problemas</span> en la ejecucion se relaciona con la capacidad para resolver tests que presumiblemente valoran funciones ejecutivas de origen prefrontal (validez convergente), mientras que las escalas de <span class="hlt">problemas</span> en el control emocional y <span class="hlt">problemas</span> en la conducta social no se relacionan con dichas capacidades cognitivas (validez discriminante). Conclusiones. El ISP es una prueba clinicamente util, psicometricamente valida y aplicable en multiples poblaciones clinicas.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27412020','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27412020"><span>[The mind-brain problem (I): onto-epistemological foundations].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Goni-Saez, F; Tirapu-Ustarroz, J</p> <p>2016-08-01</p> <p>Introduccion. La ciencia y la filosofia han abordado a lo largo de la historia del pensamiento y desde diferentes perspectivas epistemicas el <span class="hlt">problema</span> mente-cerebro. La primera de ellas acota areas especificas de la realidad y construye hipotesis de corto alcance y multiple conectividad intercientifica con el objetivo de validar modelos teoricos; la segunda extiende su arquitectura sistemica al conjunto de lo real (incluida la actividad cientifica). Desarrollo. La complejidad del <span class="hlt">problema</span> mente-cerebro exige generar un vinculo de conexion disciplinar entre la filosofia y la ciencia; nuestros presupuestos ontoepistemologicos se erigen, por lo tanto, en el marco de una filosofia orientada cientificamente (filosofia cientifica). Se defiende el materialismo emergentista <span class="hlt">como</span> solucion filosofico-cientifica coherente y contrastable en contraposicion a otras propuestas desarrolladas desde diferentes modelos ontologicos (por ejemplo, dualismo interaccionista, funcionalismo, teoria de la identidad, epifenomenalismo...). Conclusiones. La respuesta al <span class="hlt">problema</span> mente-cerebro solo es factible desde una neurociencia cognitiva fundamentada filosoficamente: el materialismo emergentista –postulado ontologico– afirma que la mente es una propiedad emergente (novedad cualitativa) del cerebro; el realismo cientifico –postulado epistemologico– sostiene que la neurociencia cognitiva es la herramienta teorico-experimental basica que posibilita el acceso cognoscitivo tanto al cerebro <span class="hlt">como</span> a sus procesos neurocognitivos. Consideramos que a partir de esta fundamentacion filosofica, la neurociencia cognitiva adquiere legitimidad epistemica para acometer el estudio del proceso mental mas genuinamente humano: la conciencia.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_12");'>12</a></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li class="active"><span>14</span></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_14 --> <div id="page_15" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li class="active"><span>15</span></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="281"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://images.nasa.gov/#/details-PIA15017.html','SCIGOVIMAGE-NASA'); return false;" href="https://images.nasa.gov/#/details-PIA15017.html"><span>NASA Satellite Tracks Underwater Volcanic Eruption in Canary Islands</span></a></p> <p><a target="_blank" href="https://images.nasa.gov/">NASA Image and Video Library</a></p> <p></p> <p>2011-11-02</p> <p>In July 2011, volcanic tremors began on the Island of El <span class="hlt">Hierro</span> in the Canary Islands; by September, many tourists evacuated the resort island, fearing a volcanic eruption. This image is from NASA Terra spacecraft.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/23808435','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/23808435"><span>Bioavailability of iron measurement in two nutrients multiple solutions by in vitro and in vivo;a comparative methodology between methods.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Bueno, Luciana; Pizzo, Juliana C; Freitas, Osvaldo; Barbosa Júnior, Fernando; dos Santos, José Ernesto; Marchini, Julio Sergio; Dutra-de-Oliveira, José Eduardo</p> <p>2013-01-01</p> <p>Objetivos: La biodisponibilidad de <span class="hlt">hierro</span> presente en una formulación nutricional puede ser evaluada por in vitro y in vivo, ya que proporcionan para un estudio de línea cohesiva y proporcionado en la literatura. El objetivo de estudio fue evaluar la biodisponibilidad de <span class="hlt">hierro</span> con in vitro y in vivo, dirigida a un análisis comparativo de dos formulaciones de suplementos nutricionales (A y B). Métodos: Fueron utilizados dos métodos descritos en la literatura que para evaluar la biodiponibilidad de <span class="hlt">hierro</span>. Uno que es la simulación de digestión humana y otro por los niveles de <span class="hlt">hierro</span> sérico después de la ingestión de la formulación en los seres humanos. Resultados: Los resultados obtenidos por la simulación in vitro de la digestión del tracto gastrointestinal humano fueron 0,70 ± 0,02 y 0,80 dialisibilidad 0,01% de <span class="hlt">hierro</span>, respectivamente, para las formulaciones A y B. Los estudios in vivo, segú n se mide por las curvas de <span class="hlt">hierro</span> en suero en seres humanos después de la ingestión de las formulaciones mostró coeficiente de variación Δ < 0, lo que indica que había una baja absorción de <span class="hlt">hierro</span>. La biodisponibilidad de <span class="hlt">hierro</span> a los dos multi-nutrientes soluciones fueron obtenidos por in vitro y in vivo mostraron que había una comparación de las metodologías utilizadas en soluciones acuosas de muchos nutrientes.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25252665','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25252665"><span>[Discipline styles and co-morbid disorders of adolescents with attention deficit hyperactivity disorder: a longitudinal study].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Colomer-Diago, Carla; Berenguer-Forner, Carmen; Tárraga-Mínguez, Raúl; Miranda-Casas, Ana</p> <p>2014-02-24</p> <p>Introduccion. Los <span class="hlt">problemas</span> en el funcionamiento cognitivo, social y educativo de los niños con trastorno por deficit de atencion/hiperactividad (TDAH) continuan estando presentes en la adolescencia y edad adulta. A pesar de que la bibliografia evidencia una relacion significativa entre la utilizacion de metodos de disciplina disfuncional y la gravedad en la evolucion del TDAH, las investigaciones de seguimiento han sido escasas. Objetivos. Analizar el poder del estilo de disciplina y de la sintomatologia de TDAH evaluados en la niñez (tiempo 1) para predecir el oposicionismo y los <span class="hlt">problemas</span> cognitivos en la temprana adolescencia (tiempo 2), y estudiar, en funcion del uso de un estilo de disciplina disfuncional, la evolucion del oposicionismo y de los <span class="hlt">problemas</span> cognitivos. Pacientes y metodos. Se evaluo a 45 niños con TDAH subtipo combinado en dos momentos temporales: tiempo 1 (6-13 años) y tiempo 2 (8-16 años). Resultados. La gravedad del TDAH y el estilo de crianza disfuncional predijeron tanto el oposicionismo <span class="hlt">como</span> los <span class="hlt">problemas</span> cognitivos estimados en el tiempo 2. Se encontro un aumento del oposicionismo entre el tiempo 1 y el tiempo 2 en el grupo de disciplina disfuncional, mientras que el efecto contrario se observo en el grupo de disciplina funcional (efecto de interaccion tiempo x estilo de disciplina). Conclusiones. El empleo de un estilo de disciplina disfuncional por parte de los padres en la niñez predice <span class="hlt">problemas</span> cognitivos y de conducta en la adolescencia. Los hallazgos tienen implicaciones en la planificacion de las intervenciones.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27019240','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27019240"><span>[In Process Citation].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Petter da Silva, Fhaira; Beatriz Dallepiane, Loiva; Ramos Kirsten, Vanessa; Maria Kirchner, Rosane</p> <p>2016-02-16</p> <p>Introducción: la esperanza de vida está aumentando y convirtiéndose en un fenómeno característico de los países desarrollados y, cada vez más, de los países en desarrollo, <span class="hlt">como</span> Brasil. El proceso de envejecimiento produce cambios en algunas funciones fisiológicas, <span class="hlt">como</span> la pérdida del olfato o gusto o pérdida de apetito, entre otros, que terminan alterando la ingesta de alimentos de estos individuos.Objetivos: este estudio tuvo <span class="hlt">como</span> objetivo evaluar el consumo de alimentos de los ancianos y de los ancianos más longevos en una ciudad del sur de Brasil.Métodos: un estudio transversal realizado mediante visitas a domicilio en Palmeira das Missões - RS, Brasil. Los datos sociodemográficos, antropométricos y dietéticos fueron recogidos a través de cuestionarios y recordatorio de 24 horas. La adecuación de nutrientes se evaluó de acuerdo con las ingestas de referencia en la dieta. Los datos fueron analizados utilizando el software SPSS 18.0.Resultados: el estudio incluyó a 424 adultos mayores, el 84.4% (n = 358) de ellos menores de 80 años y el 15.6% (n = 66) con más de 80 años. La ingesta de energía y proteínas fue insuficiente tanto para jóvenes adultos <span class="hlt">como</span> para los más ancianos. El consumo de vitaminas y minerales ha sido insuficiente en todos los adultos mayores a excepción del <span class="hlt">hierro</span>, que presentaba una ingesta excesiva. Hubo una diferencia estadísticamente significativa entre las personas de edad y mayores sólo en cuanto al consumo de lípidos y vitamina B12. Conclusión: la mayoría de los estudios con personas mayores corrobora los resultados obtenidos en este artículo. Una ingesta inadecuada de nutrientes puede dar lugar a deficiencias nutricionales y, por lo tanto, a cambios fisiológicos y patológicos que pondrían en peligro la capacidad funcional de los ancianos. El consumo de energía y de macronutrientes resultó insuficiente tanto para los ancianos <span class="hlt">como</span> para los ancianos más longevos. Además, el consumo de vitaminas y</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=FONETICA&id=EJ175807','ERIC'); return false;" href="https://eric.ed.gov/?q=FONETICA&id=EJ175807"><span>La Lengua Escrita <span class="hlt">como</span> Norma Fonetica (The Written Language as Phonetic Norm)</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Diaz-Plaja, Guillermo</p> <p>1977-01-01</p> <p>A collectivity can be defined by the verbal instrument which binds it together. By extension of this thought of Marshall MacLuhan, the importance of the written language as normative for the uniformity, universality and preservation of the phonetic system of the language is discussed. (Text is in Spanish.) (AMH)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=yo&pg=4&id=ED326040','ERIC'); return false;" href="http://eric.ed.gov/?q=yo&pg=4&id=ED326040"><span>Platero <span class="hlt">como</span> el primer paso liteario (Platero y Yo: A Student's Introduction to Literary Analysis).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Ohrtman, Dennis W.</p> <p></p> <p>This instructional guide is to be used by teachers in the instruction of "Platero y Yo," written by Juan Ramon Jimenez, one of Spain's foremost poets. A systematic study is provided of movement throughout the text, by analyzing verb tenses, to help novice Spanish literature students grasp the scholastic and psychological interpretations of poetic…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/1282622','SCIGOV-DOEDE'); return false;" href="http://www.osti.gov/scitech/servlets/purl/1282622"><span>Materials Data on <span class="hlt">Co(Mo</span>3Se4)4 (SG:1) by Materials Project</span></a></p> <p><a target="_blank" href="http://www.osti.gov/dataexplorer">DOE Data Explorer</a></p> <p>Kristin Persson</p> <p>2016-02-10</p> <p>Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/1307826','SCIGOV-DOEDE'); return false;" href="http://www.osti.gov/scitech/servlets/purl/1307826"><span>Materials Data on <span class="hlt">Co(MoS</span>2)2 (SG:12) by Materials Project</span></a></p> <p><a target="_blank" href="http://www.osti.gov/dataexplorer">DOE Data Explorer</a></p> <p>Kristin Persson</p> <p>2016-04-23</p> <p>Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28409673','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28409673"><span>"<span class="hlt">Como</span> Si Nada": Enduring Violence and Diabetes among Rural Women in Southern Mexico.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Montesi, Laura</p> <p>2017-04-14</p> <p>Rural women in Southern Mexico link their diabetes to distressful life experiences rooted in ordinary violence. While much has been written on the use that diabetes sufferers make of their morbid condition as an idiom of distress, I investigate the personal and social effects that such an idiom has on women. As I illustrate, diabetes reflects an ambivalence that helps women to speak about the unspeakable and, at the same time, reinforces their ideas of culpability, namely that they are to blame for both the gendered violence that they endure and the diabetes from which they suffer. [Figure: see text].</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=organizacion&id=ED407069','ERIC'); return false;" href="http://eric.ed.gov/?q=organizacion&id=ED407069"><span>The New Room Arrangement as a Teaching Strategy = La Nueva Organizacion del Salon <span class="hlt">como</span> Estrategia Educativa.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Dodge, Diane Trister</p> <p></p> <p>Many typical classroom behavior problems--running in the classroom, inability to make choices, failure to stick with activities, fighting over toys, and poor use of materials-- can be traced to how the room is arranged and how materials are displayed. By making a few changes in the classroom environment, early childhood teachers can create a…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED327965.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED327965.pdf"><span><span class="hlt">Como</span> escoger una escuela para su hijo (Choosing a School for Your Child).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Weston, Susan Perkins</p> <p></p> <p>Step-by-step advice for Spanish-speaking parents on how to choose among available schools for their children is offered in this guidebook. Factors to consider in making the choice are discussed, as well as information on alternatives to the available choices, which include home schooling and working to create new options. After an introductory…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=english+AND+education+AND+mexico&pg=6&id=EJ910838','ERIC'); return false;" href="https://eric.ed.gov/?q=english+AND+education+AND+mexico&pg=6&id=EJ910838"><span>"Tanto Necesitamos De Aqui <span class="hlt">Como</span> Necesitamos De Alla": "Leer Juntas" among Mexican Transnational Mothers and Daughters</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>de la Piedra, Maria Teresa</p> <p>2011-01-01</p> <p>This paper presents part of the results of a qualitative study about literacy practices of Mexican transnational mothers, who live in and frequently cross the border between two countries (the United States and Mexico). Drawing on sociocultural approaches to literacy and literature on transnationalism, I analyze one practice: "leer…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2277384','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2277384"><span>Training in dual diagnosis interventions (the <span class="hlt">COMO</span> Study): Randomised controlled trial</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Hughes, Elizabeth; Wanigaratne, Shamil; Gournay, Kevin; Johnson, Sonia; Thornicroft, Graham; Finch, Emily; Marshall, Jane; Smith, Neil</p> <p>2008-01-01</p> <p>Background Despite the high prevalence of co-morbid substance use among mental health service users (dual diagnosis), very few mental health workers in the UK have had training and/or clinical experience to equip them to deliver targeted interventions to this client group. Method In a randomised controlled trial of training for dual diagnosis interventions, 79 case managers from 12 community mental health teams in South London were randomly allocated to either receive training and follow-up supervision (experimental group) or no training and supervision (control group). Baseline measures of attitude, self-efficacy and knowledge were collected prior to randomisation, and were repeated at 18 months post-training. An intention to treat analysis of follow-up data (adjusted for baseline score for that outcome and team) was performed. Results At 18 months post-training, the AAPPQ (The Alcohol and Alcohol Problems Perception Questionnaire) total score was did not differ significantly between the two groups (adjusted difference 7.43 [95% CI -0.86 to 15.71], p = 0.08). There were significant differences in favour of the experimental group on 2 of the 6 subscales of the AAPPQ: 'adequacy of knowledge and skills in working with alcohol" (adjusted difference 3.598 [95% CI 1.03 to 6.16], p = 0.007) and "self-esteem in working with alcohol" (adjusted difference 3.00 [95% CI 0.46 to 5.54], p = 0.021). In addition there were significant improvements for the experimental group on "Knowledge About Dual Diagnosis" (adjusted difference 2.00 [95% CI 0.80 to 3.22], p = 0.002) and "Self-Efficacy Scale" (adjusted difference 13.55 [95% CI 8.00 to 26.86], p = 0.001). The effect of membership of teams was added to the analysis of covariance and this changed the results for only one variable: "self-esteem working with drinkers" was no longer significant. Conclusion A brief training course in dual diagnosis interventions had a significant effect on secondary measures of knowledge and self-efficacy that was detectable at 18 months post-training. Improvements in attitudes towards working with drinkers and drug users in mental health settings failed to reach statistical significance. Future research should explore the effects of dose of dual diagnosis training, and the successful integration of skills gained into routine care. Trial Registration: ISRCTN98891022 14th March 2007 PMID:18304310</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED401511.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED401511.pdf"><span>Escuelas sin Drogas. <span class="hlt">Como</span> Actuar. Edicion 1992. (Schools without Drugs. What Works. 1992 Edition).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Department of Education, Washington, DC.</p> <p></p> <p>Across the United States, schools and communities have found ways to turn the tide in the battle against drugs. This guidebook describes the methods they have used and the actions they have taken. The first section, "Children and Drugs" outlines the nature and extent of the drug problem and summarizes the latest research on the effects of drugs on…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED341387.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED341387.pdf"><span><span class="hlt">Como</span> ayudar a sus hijos a usar la biblioteca (Helping Your Child Use the Library).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Perkinson, Kathryn</p> <p></p> <p>Focusing on the cooperative role of parents and public libraries in stimulating reading interests in children of all ages, this booklet addresses the following issues: (1) getting children interested in reading (reading aloud to children; encouraging children to read to you; starting a home library; showing children that you enjoy reading;…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=NOTA&pg=4&id=EJ117761','ERIC'); return false;" href="https://eric.ed.gov/?q=NOTA&pg=4&id=EJ117761"><span>Nota sobre el "Se" <span class="hlt">como</span> Sujeto Indefinido (A Note on "Se" as an Indefinite Subject)</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Lujan, Marta</p> <p>1975-01-01</p> <p>Contradicts Pablo Jordan's theory that certain "se" constructions in Spanish are neither passive nor reflexive. It is claimed that syntactic evidence reveals two types of impersonal structures, the impersonal active and the passive reflexive. (Text is in Spanish.) (CK)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=marshall+AND+mac+AND+luhan&id=EJ175807','ERIC'); return false;" href="http://eric.ed.gov/?q=marshall+AND+mac+AND+luhan&id=EJ175807"><span>La Lengua Escrita <span class="hlt">como</span> Norma Fonetica (The Written Language as Phonetic Norm)</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Diaz-Plaja, Guillermo</p> <p>1977-01-01</p> <p>A collectivity can be defined by the verbal instrument which binds it together. By extension of this thought of Marshall MacLuhan, the importance of the written language as normative for the uniformity, universality and preservation of the phonetic system of the language is discussed. (Text is in Spanish.) (AMH)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=idiomas&pg=2&id=ED131690','ERIC'); return false;" href="http://eric.ed.gov/?q=idiomas&pg=2&id=ED131690"><span>Spanish Oral Language Guide: Kindergarten Level. Espanol <span class="hlt">como</span> Segundo Idioma. Teacher's Guide: Level I.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Corbell, Gloria; And Others</p> <p></p> <p>This teacher's guide to Spanish language at the kindergarten level includes a recommended subject presentation sequence for the Spanish curriculum, a sample schedule, a grouping of students using three stations, and a classroom layout. The grouping would be effective when at least one-third of the children are Spanish-speaking or bilingual. The…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/22493231','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/22493231"><span>Contributions of local knowledge to the physical limnology of Lake <span class="hlt">Como</span>, Italy.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Laborde, Sarah; Imberger, Jörg; Toussaint, Sandy</p> <p>2012-04-24</p> <p>This article shows how local knowledge may be valuably integrated into a scientific approach in the study of large and complex hydrological systems where data collection at high resolution is a challenge. This claim is supported through a study of the hydrodynamics of a large lake where qualitative data collected from professional fishers was combined with theory to develop a hypothesis that was then verified by numerical modeling. First the fishermen's narratives were found to describe with accuracy internal wave motions that were evident in water column temperature records, which revealed their practical knowledge of the lake's hydrodynamics. Second, local knowledge accounts emphasized the recurrent formation of mesoscale gyres and return flows in certain zones of the lake in stratified conditions, which did not appear in the physical data because of limitations of sampling resolution. We hypothesized that these features developed predominantly because of the interaction of wind-driven internal motions with the lake's bathymetry, and the Earth's rotation in the widest areas of the basin. Numerical simulation results corroborated the fishers' descriptions of the flow paths and supported the hypothesis about their formation. We conclude that the collaboration between scientific and local knowledge groups, although an unusual approach for a physical discipline of the geosciences, is worth exploring in the pursuit of a more comprehensive understanding of complex geophysical systems such as large lakes.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.osti.gov/scitech/servlets/purl/1323868','SCIGOV-STC'); return false;" href="http://www.osti.gov/scitech/servlets/purl/1323868"><span>Materials Data on <span class="hlt">CoMo</span> (SG:221) by Materials Project</span></a></p> <p><a target="_blank" href="http://www.osti.gov/scitech">SciTech Connect</a></p> <p>Kristin Persson</p> <p>2016-09-11</p> <p>Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_13");'>13</a></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li class="active"><span>15</span></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_15 --> <div id="page_16" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li class="active"><span>16</span></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="301"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED482992.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED482992.pdf"><span><span class="hlt">Como</span> pagar to educacion, 2004-2005 (Funding Your Education, 2004-2005).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Office of Federal Student Aid (ED), Washington, DC.</p> <p></p> <p>This publication, written in Spanish, describes financial aid programs of the U.S. Department of Education and advises students about paying for college. It outlines things a student should ask about college and how to obtain financial aid, whether grants, work-study, or loans. Chapters provide information on: (1) "Education after High School";…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2015NatSR...515208D','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2015NatSR...515208D"><span><span class="hlt">Co/Mo</span> bimetallic addition to electrolytic manganese dioxide for oxygen generation in acid medium</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Delgado, Dario; Minakshi, Manickam; McGinnity, Justin; Kim, Dong-Jin</p> <p>2015-10-01</p> <p>An efficient electrocatalyst comprising inexpensive and earth-abundant materials for the oxygen evolution reaction (OER) is crucial for the development of water electrolysis. In this work, in-situ addition of cobalt/molybdenum ions to the electrolytic manganese dioxide has been shown to be beneficial for the OER in acid solution as its overpotential performed better (305 mV) than that of the commercial DSA® (341 mV) at 100 mA cm-2. The OER was investigated at ambient temperature in 2 M H2SO4 solution on the modified EMD (MnMoCoO) electrodes. The energy efficiency of the MnMoCoO electrodes improved significantly with the amount of Co in the plating solution. For the electrodeposited catalysts, physico-chemical and electrochemical measurements were conducted including static overpotentials. The better performance of the modified EMD was attributed to an improved charge transfer resistance (Rct; 0.290 Ω cm2), average roughness factor (rf; 429) and decrease in water content in the electrodeposited catalysts. The kinetic parameters obtained on MnMoCoO catalysts were compared and discussed according to the cobalt concentration.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED249297.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED249297.pdf"><span>International Perspectives on Affirmative Action. A Bellagio Conference (Lake <span class="hlt">Como</span>, Italy, August 16-20, 1982).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Rockefeller Foundation, New York, NY.</p> <p></p> <p>This volume presents nine papers read at a conference on affirmative action, sponsored by the Rockefeller Foundation and held at Columbia University in August 1982; a preface, summary paper, and list of participants are also included. Each paper addresses the issue of affirmative action within a different country and describes: (1) the policies…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=Ramon&pg=4&id=ED326040','ERIC'); return false;" href="https://eric.ed.gov/?q=Ramon&pg=4&id=ED326040"><span>Platero <span class="hlt">como</span> el primer paso liteario (Platero y Yo: A Student's Introduction to Literary Analysis).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Ohrtman, Dennis W.</p> <p></p> <p>This instructional guide is to be used by teachers in the instruction of "Platero y Yo," written by Juan Ramon Jimenez, one of Spain's foremost poets. A systematic study is provided of movement throughout the text, by analyzing verb tenses, to help novice Spanish literature students grasp the scholastic and psychological interpretations of poetic…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=novelas&id=EJ844172','ERIC'); return false;" href="http://eric.ed.gov/?q=novelas&id=EJ844172"><span>The Struggle for Mexico's First Gay-Straight Alliance: <span class="hlt">Como</span> una Novela Real</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Macgillivray, Ian K.</p> <p>2006-01-01</p> <p>In 2004, a group of high school students at a private American school in Mexico City started the first gay-straight alliance in Mexico. A small group of conservative parents and a Mormon principal organized in opposition. This paper details the students' struggle to keep their club and offers lessons learned about student activism, school change,…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=expresions&id=EJ648937','ERIC'); return false;" href="https://eric.ed.gov/?q=expresions&id=EJ648937"><span>"Las Charlas" <span class="hlt">como</span> expresion oral diaria ["Chats" as Daily Oral Practice].</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Borden, Matt</p> <p>2002-01-01</p> <p>An oral practice system of "chats" in the classroom functions as an extemporaneous speaking exercise or chat (without notes or prompt sheets), occurring between two students for a minute or so at the beginning of class, following which the presenters respond to other students' questions. (CNP)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=estrategia&pg=2&id=ED407069','ERIC'); return false;" href="https://eric.ed.gov/?q=estrategia&pg=2&id=ED407069"><span>The New Room Arrangement as a Teaching Strategy = La Nueva Organizacion del Salon <span class="hlt">como</span> Estrategia Educativa.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Dodge, Diane Trister</p> <p></p> <p>Many typical classroom behavior problems--running in the classroom, inability to make choices, failure to stick with activities, fighting over toys, and poor use of materials-- can be traced to how the room is arranged and how materials are displayed. By making a few changes in the classroom environment, early childhood teachers can create a…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=mexican+AND+border&pg=4&id=EJ910838','ERIC'); return false;" href="http://eric.ed.gov/?q=mexican+AND+border&pg=4&id=EJ910838"><span>"Tanto Necesitamos De Aqui <span class="hlt">Como</span> Necesitamos De Alla": "Leer Juntas" among Mexican Transnational Mothers and Daughters</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>de la Piedra, Maria Teresa</p> <p>2011-01-01</p> <p>This paper presents part of the results of a qualitative study about literacy practices of Mexican transnational mothers, who live in and frequently cross the border between two countries (the United States and Mexico). Drawing on sociocultural approaches to literacy and literature on transnationalism, I analyze one practice: "leer…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED476199.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED476199.pdf"><span><span class="hlt">Como</span> pagar tu educacion, 2003-2004 (How To Pay for Your Education, 2003-2004).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Office of Federal Student Aid (ED), Washington, DC.</p> <p></p> <p>This Spanish language booklet discusses paying for college. The guide presents information in question-and-answer form about things an applicant should ask and how to obtain financial aid. It describes the criteria for receiving aid and provides information about complying with aid requirements. The booklet also describes federal Pell grants and…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=Fiesta&pg=3&id=ED131690','ERIC'); return false;" href="https://eric.ed.gov/?q=Fiesta&pg=3&id=ED131690"><span>Spanish Oral Language Guide: Kindergarten Level. Espanol <span class="hlt">como</span> Segundo Idioma. Teacher's Guide: Level I.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Corbell, Gloria; And Others</p> <p></p> <p>This teacher's guide to Spanish language at the kindergarten level includes a recommended subject presentation sequence for the Spanish curriculum, a sample schedule, a grouping of students using three stations, and a classroom layout. The grouping would be effective when at least one-third of the children are Spanish-speaking or bilingual. The…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.gpo.gov/fdsys/pkg/FR-2013-06-17/pdf/2013-14229.pdf','FEDREG'); return false;" href="https://www.gpo.gov/fdsys/pkg/FR-2013-06-17/pdf/2013-14229.pdf"><span>78 FR 36163 - Bitterroot National Forest, Darby Ranger District, <span class="hlt">Como</span> Forest Health Project</span></a></p> <p><a target="_blank" href="http://www.gpo.gov/fdsys/browse/collection.action?collectionCode=FR">Federal Register 2010, 2011, 2012, 2013, 2014</a></p> <p></p> <p>2013-06-17</p> <p>... resilience to dwarf mistletoe, root rot, Douglas-fir beetle, and spruce budworm; (4) and maintain the visual..., thermal cover, old growth, and visual quality. DATES: Comments concerning the scope of the analysis must... resilience to native insects and diseases, and (4) maintain the visual integrity of the larger Lake...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED352266.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED352266.pdf"><span><span class="hlt">Como</span> Ayudar a sus Hijos a Aprender Ciencia (Helping Your Child Learn Science).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Paulu, Nancy; Martin, Margery</p> <p></p> <p>Because most parents say they do not or cannot help their children with science, this booklet was designed to help them do so, easily and with pleasure for both parent and child. The introduction presents information on why and how parents should help their children and provides a general orientation to the ideas and activities offered in the…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED431637.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED431637.pdf"><span><span class="hlt">Como</span> ayudar a su hijo a aprender mathematicas. (Helping Your Child Learn Math).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Kanter, Patsy F.; Darby, Linda B.</p> <p></p> <p>Mathematics has become increasingly important in this technological age. That is why it is even more important for children to learn mathematics at home as well as in school. This second edition of Helping Your Children Learn Math is for parents of children in kindergarten through fifth grade. It has been revised to include a variety of activities…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=Novelas&id=EJ844172','ERIC'); return false;" href="https://eric.ed.gov/?q=Novelas&id=EJ844172"><span>The Struggle for Mexico's First Gay-Straight Alliance: <span class="hlt">Como</span> una Novela Real</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Macgillivray, Ian K.</p> <p>2006-01-01</p> <p>In 2004, a group of high school students at a private American school in Mexico City started the first gay-straight alliance in Mexico. A small group of conservative parents and a Mormon principal organized in opposition. This paper details the students' struggle to keep their club and offers lessons learned about student activism, school change,…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=pipes&pg=7&id=EJ733769','ERIC'); return false;" href="https://eric.ed.gov/?q=pipes&pg=7&id=EJ733769"><span><span class="hlt">Como</span> si le Falta un Brazo: Latino Immigrant Parents and the Costs of Not Knowing English</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Worthy, Jo</p> <p>2006-01-01</p> <p>This study examined the perspectives of Latino/a immigrant parents about the place of English in their lives. The parents described how they had come to the United States with intentions of learning English, but various obstacles made it an overwhelming challenge. The author questions whether, despite rhetoric to the contrary, financially…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.ars.usda.gov/research/publications/publication/?seqNo115=328641','TEKTRAN'); return false;" href="http://www.ars.usda.gov/research/publications/publication/?seqNo115=328641"><span>Cosmic ray soil moisture observing systems <span class="hlt">comos</span> in cap fields at El Reno Oklahoma</span></a></p> <p><a target="_blank" href="https://www.ars.usda.gov/research/publications/find-a-publication/">USDA-ARS?s Scientific Manuscript database</a></p> <p></p> <p></p> <p>Soil water content (SWC) partitions rainfall into runoff and infiltration, modulates surface and atmospheric exchanges of water and energy, affects plant growth and crop yields, and impacts chemical and biological activities of soil, among other things. Thus, SWC, especially over large scales, is a...</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26922955','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26922955"><span>[Vulnerability to self-harm in autism].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Paula-Perez, I; Artigas-Pallares, J</p> <p>2016-01-01</p> <p>Introduccion. El porque de la autolesion en las personas con autismo no parece tener una explicacion simple, sencilla y unica. La predisposicion biologica, determinados estados psicologicos de estres, un procesamiento sensorial atipico, alteraciones en la comunicacion, <span class="hlt">problemas</span> medicos, limitaciones en la regulacion emocional, entre otros, pueden llevan a la persona con autismo a dañarse. Objetivo. En este articulo se diferencia, en primer lugar, la autolesion relacionada con alteraciones del neurodesarrollo, <span class="hlt">como</span> el autismo y la autolesion vinculada a otras condiciones psiquiatricas; y en segundo lugar, se propone una primera aproximacion a un modelo integral de comprension de la autolesion en el autismo. Desarrollo. Algunas de las hipotesis explicativas de la autolesion en el autismo estan centradas en el procesamiento sensorial atipico, en alteraciones de la comunicacion y <span class="hlt">problemas</span> medicos, y en la desregulacion emocional. Conclusiones. La limitada investigacion al respecto y la confusion de los datos que se arrojan ha generado un especial esfuerzo por separar los hechos de las suposiciones en todo lo relativo a este tema. Esta modesta propuesta inicial permite elaborar una hoja de ruta que oriente y ayude a las personas con autismo, a sus familias y a los profesionales en el proceso de disminuir o eliminar este comportamiento. Se sugiere dejar de hablar de la autolesion <span class="hlt">como</span> comportamiento disruptivo y mas bien interpretarla <span class="hlt">como</span> una (inadecuada) respuesta autorregulatoria al estres.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25726818','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25726818"><span>[The role of the prefrontal cortex in the sensory problems of children with autism spectrum disorder and its involvement in social aspects].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Martínez-Sanchis, Sonia</p> <p>2015-02-25</p> <p>Introduccion. En las personas con trastornos del espectro autista (TEA), las percepciones sensoriales aberrantes podrian ser tan caracteristicas y disruptivas <span class="hlt">como</span> la presencia de anomalias en la comunicacion e interaccion social, asi <span class="hlt">como</span> de intereses restringidos y repetitivos. La mayoria presenta trastornos de la modulacion sensorial (hiper o hiporresponsividad) en varios canales sensoriales. Ademas, muestra un deficit en la integracion de la informacion procedente de varios sistemas sensoriales (por ejemplo, auditivo y visual). Todo ello agravaria los sintomas nucleares relacionados con la comunicacion y aumentaria la aparicion de <span class="hlt">problemas</span> conductuales. Objetivo. Revisar la evidencia experimental que aborda el papel de la corteza prefrontal en las experiencias sensoriales inusuales en los TEA y su implicacion en los aspectos sociales. Hay evidencia de hipoactivacion y disfuncion en redes neurales, que incluyen la corteza prefrontal y participan en la cognicion social, <span class="hlt">como</span> la red por defecto y el sistema de neuronas espejo en niños con TEA. Conclusiones. Los <span class="hlt">problemas</span> sensoriomotores a edad temprana suponen una disrupcion de la organizacion y regulacion no solo de la percepcion y la accion, sino tambien del lenguaje, el pensamiento, la emocion e incluso la memoria.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25647552','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25647552"><span>Simple predictive model for Early Childhood Caries of Chilean children.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Fierro Monti, Claudia; Pérez Flores, M; Brunotto, M</p> <p>2014-01-01</p> <p>Introducción: Las caries temprana de la infancia (CTI), a pesar de ser una enfermedad prevenible, permanece <span class="hlt">como</span> uno de los <span class="hlt">problemas</span> de salud pública, tanto en países industrializados <span class="hlt">como</span> en los que están en vías de desarrollo, afectando principalmente a poblaciones vulnerables. Objetivo: el objetivo de este trabajo fue generar un modelo sencillo basado en factores de riesgo que sea predictivo del riesgo de CTI en niños de 3-5 años de edad a fin de mejorar las estrategias preventivas a nivel de salud pública. Métodos: Se recolectaron datos clínicos, del hogar y psico-socio-cultural de niños (n=250) de ambos sexos que concurren a centros de salud en la región del Bio Bio – Chile mediante historia clínica y encuesta de comportamiento. Resultados: 24% de los niños presentó <span class="hlt">problemas</span> de comportamiento (un comportamiento extraño fue la principal característica observada <span class="hlt">como</span> <span class="hlt">problema</span> de comportamiento). Las variables asociadas a ceo ?4 fueron: mal temperamento del niño (OR=2,43 [1,34; 4,40]) y estrés del hogar (OR=3,14 [1,54; 6,41]). Se observe que el modelo estratificado por género masculino fue el que presentó la mayor precisión diagnóstica de CTI (AUC= 78%, p-valor=0.000); además Conclusiones: Proponemos un modelo donde la higiene oral, el consumo de azúcar, el género masculino y el mal temperamento son los principales factores de predictivos de CTI. Este modelo podría ser una herramienta promisoria para el costo-efectividad del control de caries temprana.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27759964','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27759964"><span></span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Bellido, Diego; Bellido, Virginia</p> <p>2016-09-20</p> <p>El sobrepeso y la obesidad se definen <span class="hlt">como</span> un depósito anormal o excesivo de grasa corporal. El aumento de su prevalencia en las últimas décadas lo convierte en uno de los principales <span class="hlt">problemas</span> de salud pública que afecta a 42 millones de niños menores de 5 años en el mundo. Su presencia durante la infancia puede ser causa de enfermedades metabólicas hasta ahora consideradas típicas del adulto y mortalidad prematura, por lo que su correcto diagnóstico y tratamiento son fundamentales.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_14");'>14</a></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li class="active"><span>16</span></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_16 --> <div id="page_17" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li class="active"><span>17</span></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="321"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26262747','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26262747"><span>[ACCEPTANCE OF PULP FRUIT BEVERAGES FORTIFIED WITH FERROUS FUMARATE; AN ALTERNATIVE SUPPLEMENT FOR A HEALTH PROGRAM].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Morales Guerrero, Josefina Consuelo; García Zepeda, Rodrigo Antonio; Sánchez Vargas, Elena</p> <p>2015-07-01</p> <p>Introducción: la desnutrición y la deficiencia de <span class="hlt">hierro</span> son <span class="hlt">problemas</span> de salud pública en varios países, México no es la excepción, y la mayor prevalencia se presenta en el medio rural. Una forma de atenderla es a través de la suplementación. El suplemento que se seleccione debe ser aceptado sensorialmente por el consumidor final para que la intervención sea exitosa. Objetivos: elaborar un suplemento multivitamínico para el programa “Salud y Nutrición para Pueblos Indígenas” y evaluar su aceptación en la población infantil urbana y rural. Métodos: se determinaron las características fisicoquímicas del producto a desarrollar y el método de elaboración y de preparación para su consumo. La aceptación se evaluó en niños de entre 6 a 24 meses de edad, con una prueba de caritas, y en los infantes de 6 a 12 meses se corroboró con el registro del volumen consumido. Para determinar las diferencias en la aceptación por edad y género en la misma población y para establecer diferencias entre poblaciones se aplicó una Ji cuadrada. Resultados: los suplementos, en los tres sabores evaluados, cumplieron con la concentración de vitaminas y nutrimentos inorgánicos establecidos en el programa citado. El 80% de los niños aceptaron los suplementos multivitamínicos (SM) en sus tres sabores. La edad de los niños fue el factor que más influyó en la aceptación. Conclusión: los SM desarrollados en este estudio son una alternativa al suplemento que actualmente proporciona el PSNPI, para los niños mayores a seis meses.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/23897160','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/23897160"><span>[Language disorders. Diagnosis and treatment].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Moreno-Flagge, Noris</p> <p>2013-09-06</p> <p>Objetivos. Se revisan los trastornos del lenguaje en el niño. Partiendo de su desarrollo normal, se provee un diagnostico diferencial de acuerdo con la sintomatologia que presenta en el momento de la consulta y se sugiere un abordaje para el niño con alteraciones del lenguaje desde el punto de vista del neuropediatra a la vez que se actualiza el manejo de algunas de sus formas. Desarrollo. La adquisicion del lenguaje es uno de los hitos clave del desarrollo del niño. El desarrollo social e intelectual del niño se ve afectado por el retraso en la adquisicion del lenguaje y este puede crear un efecto continuo de aislamiento y regresion, que pasa hacia un rendimiento academico pobre y, eventualmente, lleva hacia el desarrollo de <span class="hlt">problemas</span> de aprendizaje y sociales. Existen estudios que muestran una relacion estrecha en el niño entre el desarrollo del lenguaje hablado y el lenguaje escrito y la importancia de la adquisicion del lenguaje <span class="hlt">como</span> base de las habilidades de la escritura. Estos <span class="hlt">problemas</span> son causa de mucha ansiedad en los padres. Conclusion. El conocimiento del <span class="hlt">problema</span> permite al especialista captar tempranamente a los niños en la etapa preescolar y asegurarse de que provee los servicios adecuados. Tratado a tiempo, se puede modificar, de manera significativa, el aprendizaje del lenguaje y, con ello, evitar las complicaciones que inciden en su desarrollo. El especialista que trata con niños debe reconocer estos <span class="hlt">problemas</span> y canalizarlos hacia la terapia adecuada.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25125065','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25125065"><span>[Experience in kidney transplantation without blood transfusion: kidney transplantation transfusion-free in Jehovah's Witnesses. First communication in Mexico].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Hernández-Navarrete, Liliana Stefany; Hernández-Jiménez, Jesús Diego; Jiménez-López, Luis Alfredo; Budar-Fernández, Luis Filadelfo; Méndez-López, Marco Tulio; Martínez-Mier, Gustavo</p> <p>2013-01-01</p> <p>Antecedentes: los Testigos de Jehová rechazan la transfusión sanguínea, pero aceptan el trasplante de órganos, albúmina, inmunoglobulina, vacunas y factores de coagulación. Casos clínicos: comunicamos tres casos de pacientes (dos masculinos y uno femenino) a quienes se realizó trasplante renal en Testigos de Jehová sin transfusión sanguínea, con edad promedio de 31.33 años e índice de masa corporal promedio de 20.99 kg/m(2). Los tres pacientes recibieron diálisis peritoneal pre trasplante por un promedio de 52.3 meses. Se realizaron dos trasplantes de donante vivo y uno de fallecido, con isquemia fría de 23 horas. Los donantes fueron dos femeninos y uno masculino, con edad promedio de 34.33 años. Los tres pacientes recibieron eritropoyetina y <span class="hlt">hierro</span> dextrán pretrasplante y en el transoperatorio se utilizó una máquina de recuperación celular. Las concentraciones de hemoglobina, hematócrito, glóbulos rojos, creatinina sérica y filtración glomerular a 24 meses postrasplante permanecieron estables. La inducción se realizó con basiliximab y la inmunosupresión inicial con inhibidores de calcineurina. Uno de los pacientes tuvo <span class="hlt">como</span> complicación un hematoma perirrenal que ameritó reintervención a los 20 días postrasplante. A 5, 26 y 36 meses postrasplante los tres pacientes están vivos y con injerto funcional. Conclusión: es posible realizar trasplantes renales sin transfusión sanguínea en Testigos de Jehová, con supervivencia global aceptable y sin episodios de rechazo agudo.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25301136','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25301136"><span>[Idiopathic scrotal elephantiasis. A case report].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>López-Caballero, Ignacio; Sánchez-Ruvalcaba, Itzel; Sánchez-Martinez, Luis Carlos; Hernández-Ordoñez, Octavio; Gómez-Lara, Miguel; Flores-Carrillo, Víctor</p> <p>2014-01-01</p> <p>Introducción: el linfedema penoescrotal (también conocido <span class="hlt">como</span> elefantiasis penoescrotal) es una condición que históricamente se ha descrito en áreas en las que la filariasis es endémica. Caso clínico: presentamos el caso de un hombre de 45 años de edad con linfedema escrotal. Después de descartar las causas adquiridas de linfedema, el paciente fue sometido a escrotectomía, prepuciectomía y reconstrucción escrotal y peneana. Actualmente el paciente se encuentra en seguimiento, sin datos de recidiva. Conclusión: el linfedema penoescrotal puede causar síntomas de debilidad e inmovilidad, así <span class="hlt">como</span> <span class="hlt">problemas</span> psicológicos. La cirugía otorga resultados cosméticos y funcionales aceptables.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25984622','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25984622"><span>[Association between anxiety and coping strategies employed by primary caregivers of bedridden patients].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Cedillo-Torres, Arianna Gabriela; Grijalva, María Guadalupe; Santaella-Hidalgo, Guadalupe B; Cuevas-Abad, Martha; González Pedraza-Avilés, Alberto</p> <p>2015-01-01</p> <p>Introducción: el cuidador primario enfrenta un conjunto de <span class="hlt">problemas</span> derivados de la responsabilidad que representa cuidar al paciente; esto conlleva la generación de respuestas psicológicas complejas que actúan <span class="hlt">como</span> mecanismos cognitivos y conductuales, conocidos <span class="hlt">como</span> afrontamiento. El objetivo fue determinar si existía correlación entre el nivel de ansiedad y las estrategias de afrontamiento empleadas por los cuidadores primarios de pacientes en estado de postración. Métodos: estudio descriptivo, correlacional y transversal. Se aplicaron el Inventario de Ansiedad de Beck y el Inventario de Estrategias de Afrontamiento. Se utilizó el coeficiente de correlación de Spearman, un nivel de significación de 0.05 y el programa estadístico SPSS, versión 15. Resultados: se trató de 60 cuidadores primarios. La puntuación más frecuente para ansiedad fue nivel moderado (28 %). La estrategia más frecuentemente utilizada fue la resolución de <span class="hlt">problemas</span> (media = 14.7). Al relacionar las variables se obtuvo correlación significativa con la resolución de <span class="hlt">problemas</span> r = 0.260; la autocrítica r = 0.425; pensamiento desiderativo r = 0.412, y retirada social r = 0.453. Conclusiones: la ansiedad influye en la forma de afrontar de los cuidadores; la mayoría de la población que tiene ansiedad de moderada a severa utiliza estrategias desadaptativas enfocadas a la emoción.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25929361','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25929361"><span>[Breastfeeding as a method to prevent cardiovascular diseases in the mother and the child].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Aguilar Cordero, María José; Madrid Baños, Nayra; Baena García, Laura; Mur Villar, Norma; Guisado Barrilao, Rafael; Sánchez López, Antonio Manuel</p> <p>2015-05-01</p> <p>Introducción: La lactancia materna es una práctica recomendada desde las instituciones sanitarias nacionales e internaciones, debido a los beneficios que reporta para la salud, tanto del lactante <span class="hlt">como</span> de la madre. Se ha comprobado que los <span class="hlt">problemas</span> cardiovasculares de las madres que lactan son menores que las de aquellas que no lo han hecho nunca, entre ellos, la hipertensión arterial. Objetivo: El objetivo de esta revisión es analizar los estudios que han investigado la lactancia materna, <span class="hlt">como</span> protección frente a los <span class="hlt">problemas</span> cardiovasculares de la madre y el niño. Métodos: Se ha efectuado una búsqueda sistemática y se seleccionaron 12 meta-análisis o revisiones, 7 artículos originales de ensayos clínicos, 39 estudios de cohorte o longitudinales y 14 estudios correlacionales de muestra amplia y descriptivos. Resultados/conclusión: La enfermedad cardiovascular es la principal causa de muerte de las mujeres en todo el mundo. La dieta, el ejercicio, dejar de fumar y el control de la presión arterial son todos reconocidos <span class="hlt">como</span> elementos clave en la prevención de las enfermedades cardiovasculares. Se ha demostrado que la lactancia materna influye positivamente en los niveles de la presión arterial materna y del niño, tanto a corto <span class="hlt">como</span> a largo plazo. Es, pues, necesario facilitar más información a la población para promocionar la lactancia materna y conocer así sus beneficios.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2000BAAA...44....3C','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2000BAAA...44....3C"><span>Difusión de Arnold en un modelo simple</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Cincotta, P. M.; Nuñez, J. A.; Miloni, O.</p> <p></p> <p>Investigadores <span class="hlt">como</span> Merritt, Valluri, Pfenniger o Contopoulos (por citar los más relevantes) consideran seriamente la hipótesis que la difusión de Arnold juega un rol importante en la evolución dinámica de los sistemas estelares y planetarios. Sin embargo no existe ninguna evidencia. El mayor <span class="hlt">problema</span> para investigar fenómenos <span class="hlt">como</span> éste es que uno debe estudiar numéricamente sistemas multidimensionales (más de dos grados de libertad) y visualizar de alguna manera el espacio de fases (más de cuatro dimensiones). Más complicado aún es el caso de difusión de Arnold, donde deben considerarse tiempos de movimiento extremadamente largos y tratar con parámetros exponencialmente pequeños. El propósito de este trabajo es estudiar, en un modelo simple 3D, la existencia o no de difusión de Arnold mediante experimentos numéricos y estimaciones analíticas. Siguiendo los trabajos de Cincotta (2000) y Cincotta, Nuñez y Simo (2000), aquí se pretende ``visualizar" la difusión y, a la vez, determinar la escala de tiempo en la que ésta se podría manifestar. Este trabajo es el escalón inicial para luego abordar este <span class="hlt">problema</span> en modelos.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.dtic.mil/docs/citations/AD1025061','DTIC-ST'); return false;" href="http://www.dtic.mil/docs/citations/AD1025061"><span>Propuesta Para La Creacion Del Cuerpo De Ingenieros De Las Fuerzas Armadas De Honduras. Proposal for the Creation of a Corps of Engineers in the Honduran Armed Forces</span></a></p> <p><a target="_blank" href="http://www.dtic.mil/">DTIC Science & Technology</a></p> <p></p> <p>2016-05-26</p> <p>15 Enunciado del <span class="hlt">problema</span> ...16 Formulación del <span class="hlt">problema</span> ... <span class="hlt">problema</span> central que se presenta a menudo y que amerita su atención se centra en el desarrollo económico enfocados en la competitividad, desarrollo</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED412715.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED412715.pdf"><span>Keys to the Future: A Handbook for Parents of Children with Disabilities [and] Las Llaves para el Futuro: Un Libro para los Padres de Ninos con <span class="hlt">Problemas</span> de Desarrollo.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Idaho State Council on Developmental Disabilities.</p> <p></p> <p>Designed for parents of children with disabilities, this handbook (in both English and Spanish versions) provides information about services available in Idaho, how to use these services, and how to approach the job of parenting a child with disabilities. Chapters include: (1) "Beginnings: Understanding Your Family and Your Child with a…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27448265','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27448265"><span>[Efectividad de un programa manualizado de intervención en habilidades de resolución de <span class="hlt">problemas</span> para niños con trastorno del espectro autista (TEA)].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Bonete, Saray; Molinero, Clara; Mata, Sara; Calero, M D; Gómez-Pérez, M M</p> <p>2016-08-01</p> <p>Children with Autism spectrum disorders (ASD) frequently present a deficit in interpersonal and social problem solving skills. The Interpersonal Problem-Solving Skills Programme for Children (SCI-Children) comprises 10 weekly, one hour sessions working on interpersonal abilities from a mediation strategy for training purposes. The first study explores the effectiveness of training through pre- and post-treatment evaluations of a sample of 22 children with ASD (7-13 years of age). The second study replicates the programme with 15 children who were assessed three times (three months before the programme starts, at the beginning of the training and at the end of it). In the first study, significant differences were found in outcome measures (a parent-report subscale of a socialisation measure and child performance on one subscale and total scores of an interpersonal problem-solving skills task). Results in the second study showed no significant changes in absence of the treatment during the waiting period and significant changes after the treatment in the socialisation measure. These findings suggest that the SCI-Children program causes positive impact on the participants. Further evaluation is warranted.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2854515','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2854515"><span>ANÁLISE DA INSERÇÃO DOS TEMAS DE HUMANIDADES E ÉTICA, COM METODOLOGIA DE APRENDIZAGEM BASEADA EM <span class="hlt">PROBLEMAS</span>, EM CURRICULO MÉDICO INTEGRADO EM ESCOLA PÚBLICA NO DISTRITO FEDERAL, BRASIL</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Novaes, Maria Rita Carvalho Garbi; Novaes, Luiz Carlos Garcez; Guilhem, Dirce; Lolas, Fernando; Silveira, Carla; Guiotti, Murilo</p> <p>2009-01-01</p> <p>Objetivo Realizar uma análise da inserção da ética e humanidades no currículo do Curso de Medicina da Escola Superior em Ciências da Saúde - ESCS, escola pública do Distrito Federal, Brasil, de forma a contribuir com o processo de gestão curricular. Metodologia O Estudo é de coorte e documental. Foram pesquisados 37 termos relacionados à ética e 36 referentes à humanização nos objetivos educacionais e conteúdo dos módulos temáticos, habilidades e atitudes e interação ensino-serviço-comunidade, de 1a a 4a série e no programa do internato no currículo (ano 2006) e no projeto pedagógico do Curso de Medicina (2001). Resultados Maior inserção da humanização, ética e bioética na 1a e 2a série, quando comparado à inserção na 3a e 4a série e no internato, (IC95%-α=0,034, pvalue=0,007). Unidade de habilidades e atitudes: freqüência das 3 temáticas no currículo da 1a a 4a séries (IC95%-α=0,026, pvalue=0,013). Quando comparada a inserção entre o internato e as quatro primeiras séries, observa-se que nestas a inserção da temática humanização é superior (IC95%-α=0,042, pvalue=0,029). Conclusão O currículo desenvolvido no ano de 2006 na ESCS apresentou correlação com o projeto pedagógico do curso e contemplou a temática de forma abrangente, em todas as séries e internato. PMID:20396594</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=embarazo&id=ED463474','ERIC'); return false;" href="http://eric.ed.gov/?q=embarazo&id=ED463474"><span>Nine Tips To Help Faith Leaders and Their Communities Address Teen Pregnancy = Nueve consejos para ayudar a lideres espirituales y sus comunidades a hacerle frente al <span class="hlt">problema</span> del embarazo en la adolescencia.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>National Campaign To Prevent Teen Pregnancy, Washington, DC.</p> <p></p> <p>To support faith communities in protecting teenage boys and girls from too-early sexual activity and teen pregnancy, the National Campaign To Prevent Teen Pregnancy's Task Force on Religion and Public Values has compiled these nine tips which summarize a wealth of experience and advice from faith leaders around the country. The members of the Task…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=conducta&id=ED472555','ERIC'); return false;" href="http://eric.ed.gov/?q=conducta&id=ED472555"><span>SOS! Ayuda para Padres: Una Guia Practica para Manejar <span class="hlt">Problemas</span> de Conducta Comunes y Corrientes. (SOS! Help for Parents: A Practical Guide for Handling Common Everyday Behavior Problems.) Leader's Guide.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Clark, Lynn</p> <p></p> <p>This Spanish-language version of "SOS" provides parents with guidance for handling a variety of common behavior problems based on the behavior approach to child rearing and discipline. This approach suggests that good and bad behavior are both learned and can be changed, and proposes specific methods, skills, procedures, and strategies…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2005IAIss..30..200S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2005IAIss..30..200S"><span>Lunnoe zatmenie -330, sept. 20 i <span class="hlt">problema</span> izmereniya dolgoty v antichnoj geografii %t The -330, Sept. 20 lunar eclipse and the problem of the determination of longitude in ancient geography</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Shcheglov, D. A.</p> <p></p> <p>The attempt to reconstruct the Hipparchus system of is proposed. The offered analysis of certain passages in the treatises of Ptolemy, Pliny, and Strabo allows to trace the latent semantic connection between them and to advance a hypothesis to clarify it. Ptolemy's passage (sect. 3) states Hipparchus to propose in his geography a certain system of meridians and to use the -330, Sept. 20 eclipse to determine the relative longitudes of Arbela and Carthage. Pliny's evidence (4) shows that Hipparchus must have known about the observation of this eclipse from Sicily, which demands to situate this island far eastward of Carthage. Strabo's data (5) confirm that Hipparchus, while criticising Eratosthenes, suggested situating Sicily far eastward of Carthage. Ptolemy's data (6) show that Marinus, whose work Ptolemy's geography was based on, in his early redaction, must situate Sicily farther eastward than in the final variant. Posidonius' passage (7) demonstrates the latitude of Sicily in Ptolemy's geography to go back to Hipparchus. In "Almagest" (9) the longitude of Babylon (relative to Alexandria) is directly ascribed to Hipparchus and the longitude of Rome agrees with that of Sicily in Pliny's evidence. The data of Ptolemy's geography (9.3-9.5) permit that Arbela and Babylon were situated on the same meridian initially. All these enable us to suggest that Hipparchus determined the longitudes not only of Arbela and Babylon, but also of Babylon and Sicily, Alexandria and Rome.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED135281.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED135281.pdf"><span>Educational Assistance Overpayments, A Billion Dollar <span class="hlt">Problem--A</span> Look at the Causes, Solutions, and Collection Efforts. Veterans Administration. Report to the Congress by the Comptroller General of the United States.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Comptroller General of the U.S., Washington, DC.</p> <p></p> <p>Overpayments to veterans and veterans' dependents under the VA's educational assistance programs have increased dramatically in recent years; as of the end of 1975, cumulative overpayments totaled almost $1.4 billion. In fiscal year 1967, overpayments represented 0.7 percent of VA's total educational benefits paid, whereas in the first six months…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=problemas+OR+distribucion&pg=5&id=EJ375105','ERIC'); return false;" href="http://eric.ed.gov/?q=problemas+OR+distribucion&pg=5&id=EJ375105"><span>Il <span class="hlt">problema</span> della scelta e della continuita della lingua straniera nella scuola dell'obbligo (Problems of Choice and Continuity of a Foreign Language in Elementary and Junior High School).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Gotti, Maurizio</p> <p>1987-01-01</p> <p>Discusses two current problems with foreign language study in Italy: (1) Students are frequently unable to study English, the most popular language, because of a lack of qualified English teachers; and (2) Students sometimes cannot continue studying in junior high school the language they began in elementary school. (CFM)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=pedagogia&pg=2&id=EJ387325','ERIC'); return false;" href="https://eric.ed.gov/?q=pedagogia&pg=2&id=EJ387325"><span>Studiar L'inglese dalle elementari--<span class="hlt">Problema</span> europeo: Una proposta nuova della pedagogia cibernetica (Beginning the Study of English in the Elementary School Grades--A European Problem: A New Proposal from Cibernetic Education).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Chiti-Batelli, Andrea</p> <p>1986-01-01</p> <p>Warns the European community of the dangers of accepting English as the international language and urges the adoption of Esperanto, a neutral language without its own cultural tradition, as the international lingua franca. (CFM)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=ayuda&id=ED472555','ERIC'); return false;" href="https://eric.ed.gov/?q=ayuda&id=ED472555"><span>SOS! Ayuda para Padres: Una Guia Practica para Manejar <span class="hlt">Problemas</span> de Conducta Comunes y Corrientes. (SOS! Help for Parents: A Practical Guide for Handling Common Everyday Behavior Problems.) Leader's Guide.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Clark, Lynn</p> <p></p> <p>This Spanish-language version of "SOS" provides parents with guidance for handling a variety of common behavior problems based on the behavior approach to child rearing and discipline. This approach suggests that good and bad behavior are both learned and can be changed, and proposes specific methods, skills, procedures, and strategies…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=pedagogia&pg=2&id=EJ387325','ERIC'); return false;" href="http://eric.ed.gov/?q=pedagogia&pg=2&id=EJ387325"><span>Studiar L'inglese dalle elementari--<span class="hlt">Problema</span> europeo: Una proposta nuova della pedagogia cibernetica (Beginning the Study of English in the Elementary School Grades--A European Problem: A New Proposal from Cibernetic Education).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Chiti-Batelli, Andrea</p> <p>1986-01-01</p> <p>Warns the European community of the dangers of accepting English as the international language and urges the adoption of Esperanto, a neutral language without its own cultural tradition, as the international lingua franca. (CFM)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=linguistica&pg=5&id=EJ434570','ERIC'); return false;" href="https://eric.ed.gov/?q=linguistica&pg=5&id=EJ434570"><span>Il fattore "eta'" nell'acquisizione linguistica (L1 e L2): dimensioni di un "meta-<span class="hlt">problema</span>" (The "Age" Factor in Language Acquisition [L1 and L2]: The Dimensions of a "Meta-Problem").</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Titone, Renzo</p> <p>1991-01-01</p> <p>Summarizes and comments on two recent books, one by Birgit Harley and the other by David Singleton, that review the language research carried out to determine the importance of age in learning a second language. (CFM)</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_15");'>15</a></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li class="active"><span>17</span></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_17 --> <div id="page_18" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li class="active"><span>18</span></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="341"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=Problemas+OR+drogas&pg=5&id=EJ375105','ERIC'); return false;" href="https://eric.ed.gov/?q=Problemas+OR+drogas&pg=5&id=EJ375105"><span>Il <span class="hlt">problema</span> della scelta e della continuita della lingua straniera nella scuola dell'obbligo (Problems of Choice and Continuity of a Foreign Language in Elementary and Junior High School).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Gotti, Maurizio</p> <p>1987-01-01</p> <p>Discusses two current problems with foreign language study in Italy: (1) Students are frequently unable to study English, the most popular language, because of a lack of qualified English teachers; and (2) Students sometimes cannot continue studying in junior high school the language they began in elementary school. (CFM)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=adolescencia&id=ED463474','ERIC'); return false;" href="https://eric.ed.gov/?q=adolescencia&id=ED463474"><span>Nine Tips To Help Faith Leaders and Their Communities Address Teen Pregnancy = Nueve consejos para ayudar a lideres espirituales y sus comunidades a hacerle frente al <span class="hlt">problema</span> del embarazo en la adolescencia.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>National Campaign To Prevent Teen Pregnancy, Washington, DC.</p> <p></p> <p>To support faith communities in protecting teenage boys and girls from too-early sexual activity and teen pregnancy, the National Campaign To Prevent Teen Pregnancy's Task Force on Religion and Public Values has compiled these nine tips which summarize a wealth of experience and advice from faith leaders around the country. The members of the Task…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=linguistica&pg=5&id=EJ434570','ERIC'); return false;" href="http://eric.ed.gov/?q=linguistica&pg=5&id=EJ434570"><span>Il fattore "eta'" nell'acquisizione linguistica (L1 e L2): dimensioni di un "meta-<span class="hlt">problema</span>" (The "Age" Factor in Language Acquisition [L1 and L2]: The Dimensions of a "Meta-Problem").</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Titone, Renzo</p> <p>1991-01-01</p> <p>Summarizes and comments on two recent books, one by Birgit Harley and the other by David Singleton, that review the language research carried out to determine the importance of age in learning a second language. (CFM)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2004BAAA...47...81L','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2004BAAA...47...81L"><span>Condiciones de fase y continuación analítica de órbitas periódicas de transferencia rápida de RTBP Tierra-Luna al <span class="hlt">problema</span> cuasi-circular Sol-Tierra-Luna</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Leiva, A. M.; Briozzo, C. M.</p> <p></p> <p>We present a first order necessary condition for the value of the initial Solar phase, allowing the analytic continuation of periodic orbits from the Earth-Moon Restricted Three Body Problem (RTBP) to the Sun-Earth-Moon Quasi-Bicircular Problem (QBCP). We apply this condition to several fast Earth-Moon transfer orbits, detailing the final orbits obtained for the QBCP.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2005IAIss..30...75I','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2005IAIss..30...75I"><span><span class="hlt">Problema</span> vizual'noj registratsii nablyudenij v opticheskoj astronomii XVII-XVIII vekov %t Problem of visual registration of observations in optical astronomy in the 17th-18th centuries</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Ivanov, Kostantin V.</p> <p></p> <p>This paper attempts to explain the growth of optical astronomy as a result of more general social and cultural change in European life during the two post-Renaissance centuries. It shows how the introduction of optical instruments into astronomical work was accompanied (and partly conditioned) by a few nonastronomical practices, such as collecting unusual things and their images, producing illusionary effects by means of optical devices, manufacturing pictures that could disturb the common visual perception, etc. The paper draws particular attention to the practices of manipulation with visual images that could help to introduce "illusionary" optical knowledge into making "true" drawings from natural objects, including celestial ones. In this way, the formation of new astronomical language can be understood as closely connected to the explicit formulation of technological instructions and legal rules for making copies from natural objects, as well as the general development of printing production and broadening of the market of printed illustrations. These often not enough co-ordinated practices stipulated the shift of optical astronomy into a significant part of seigniorial culture, where it obtained recognition as an essentially new and elite knowledge, associated with particular technological vigilance. During the transition of European monarchies into the absolutist social order, astronomy, on a level with other court services, assumed a shape of professional occupation supplied with certain monetary salaries, a stable position in official hierarchy, and supreme privileges. This was the way by which astronomy merged with the other natural studies and became one of the publicly recognised scientific disciplines.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2008RELEA...6...55D','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2008RELEA...6...55D"><span>Insertion of Astronomy as a High School Subject. (Spanish Title: Inserción de Astronomia <span class="hlt">Como</span> Materia del Ciclo Secundario.) Inserção da Astronomia <span class="hlt">Como</span> Disciplina Curricular do Ensino Médio</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Dias, Claudio André C. M.; Santa Rita, Josué R.</p> <p>2008-12-01</p> <p>Astronomy is considered among the first sciences that man dominated, however, the basic skills for the construction of knowledge, relatively to the contents "Earth and the Universe" are not being developed properly for the majority of students concluding the high school level. The students are concluding this teaching cycle without proper knowledge of several subjects in the area of Astronomy, which are mandatory in the national Curricular National Parameters (PCN). Because of this discrepancy, this work stresses the need of the incorporation of a specific subject of Astronomy in the high school, in order to reduce the gap between what is taught and which should be taught. La Astronomía es considerada una de las primeras ciencias que el hombre dominó. Sin embargo, las habilidades básicas para la construcción del conocimento, relativo al eje temático "Tierra y Universo", no vienen siendo trabajadas adecuadamente con la mayoría de los alumnos que concluyen el ciclo escolar medio. Los alumnos están concluyendo este nivel de enseñanza sin conocimentos de varios temas en el área de Astronomía, que son obligatorios según los Parámetros Curriculares Nacionales (PCN). En virtud de esta discrepancia, este trabajo enfatiza la necesidad de incorporar una disciplina específica de Astronomía em el ciclo medio, em pro de la reducción de las distorsiones entre lo que es enseñado y lo que se debe enseñar. A Astronomia é considerada uma das primeiras ciências que o homem dominou, porém as competências básicas para a construção do conhecimento, relativo ao eixo temático "Terra e Universo", não vêm sendo trabalhadas a contento com a maioria dos alunos que concluem o ensino médio. Os alunos estão concluindo este nível de ensino sem conhecimento de vários temas na área de Astronomia, que são obrigatórios nos Parâmetros Curriculares Nacionais (PCN). Em virtude desta discrepância, este trabalho vem evidenciar a necessidade da incorporação de uma disciplina específica de Astronomia, no ensino médio, em prol da redução das distorções entre o que é ensinado e o que se deve ensinar.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED344962.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED344962.pdf"><span>How Families Teach, Support, Learn, Make Decisions: Ways for Families To Help Children Do Better in School = <span class="hlt">Como</span> las Familias Ensenan, Apoyan, Aprenden, Toman Decisiones: <span class="hlt">Como</span> las Familias Ayudan a los Ninos a Mejorar en la Escuela.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>RMC Research Corp., Hampton, NH.</p> <p></p> <p>This booklet contains ideas about how families can help children in school in the following basic ways by: (1) teaching their children; (2) learning new things to help their children learn; (3) supporting children and the school; and (4) making decisions about what and how children learn. For each of these areas, a chart is included so that…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26319825','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26319825"><span>[SOCIODEMOGRAPHIC FACTORS AND ADEQUACY OF PRENATAL CARE ASSOCIATED PERINATAL MORTALITY IN COLOMBIAN PREGNANT WOMEN].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Flores Navarro-Pérez, Carmen; González-Jiménez, Emilio; Schmidt-RioValle, Jacqueline; Meneses-Echávez, José Francisco; Martínez-Torres, Javier; Ramírez-Vélez, Robinson</p> <p>2015-09-01</p> <p>Introducción: el adecuado seguimiento clínico y el cumplimiento de los requerimientos nutricionales, son aspectos esenciales para el adecuado desarrollo fetal y la culminación exitosa del embarazo. El objetivo de este estudio fue determinar la asociación entre los factores sociodemográficos y el seguimiento prenatal asociados a la mortalidad perinatal en gestantes de Colombia. Material y métodos: estudio descriptivo y transversal secundario a la información obtenida en la Encuesta Nacional de la Situación Nutricional 2010 (ENSIN 2010) y la Encuesta Nacional de Demografía y Salud (ENDS 2010), en 14.754 mujeres gestantes de entre 13 y 44 años de edad. Los factores sociodemográficos: sexo del recién nacido, región geográfica (atlántica, oriental, central, pacífica, Bogotá, territorios nacionales), nivel socioeconómico- Sisbén (I al VI) y área geográfica (cabecera municipal, centro poblado, población dispersa), el seguimiento prenatal (control de peso, altura uterina, presión arterial, fetocardia, bioquímica sanguínea, análisis de orina) y la suplementación con <span class="hlt">hierro</span>, calcio y ácido fólico se recogieron a través de una encuesta estructurada. Se establecieron asociaciones mediante la construcción de modelos de regresión logística binaria simple y multivariable. Resultados: de las variables sociodemográficas, residir en centros poblados, región oriental o pacífica, y pertenecer al nivel Sisbén I, son las que mostraron mayor frecuencia de muerte perinatal, con valores de 1,7%, 1,5%, 1,4% y 1,4%, respectivamente. Tras ajustar por sexo del recién nacido, área, región geográfica y puntaje de Sisbén, se encontró que un inadecuado seguimiento en el control del peso (OR 5,12), la presión arterial (OR 5,18), la bioquímica sanguínea (OR 2,19) y la suplementación con <span class="hlt">hierro</span> (OR 2,09), calcio (OR 1,73) y ácido fólico (OR 2,73) se asociaron <span class="hlt">como</span> factores predisponentes a la mortalidad perinatal. Conclusiones: la mortalidad perinatal</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/EJ1051596.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/EJ1051596.pdf"><span>Significant Learning Experiences for English Foreign Language Students (Experiencias significativas para estudiantes de inglés <span class="hlt">como</span> lengua extranjera)</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Becerra, Luz María; McNulty, Maria</p> <p>2010-01-01</p> <p>This action research examines experiences that students in a grade 10 EFL class had with redesigning a grammar-unit into a topic-based unit. Strategies were formulating significant learning goals and objectives, and implementing and reflecting on activities with three dimensions of Dee Fink's (2003) taxonomy of significant learning: the human…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED413766.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED413766.pdf"><span>Programa Academico de Dominio de Ingles <span class="hlt">Como</span> Lengua Extranjera (Academic Program in English as a Foreign Language).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Flores Revilla, Maria Teresa; Zoreda, Margaret Lee; Vivaldo Lima, Javier; Blanco Lopez, Guadalupe; Caballero Robles, Teresita del Rosario; Mercau Appiani, Virginia</p> <p></p> <p>The guide presents the newly-developed curriculum of the Universidad Autonoma Metropolitana at Iztapalapa (Mexico) for its program in English as a foreign language. An introductory section provides background information on the initiative to design a new curriculum. The second section presents the principles on which the curriculum and its methods…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED467566.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED467566.pdf"><span><span class="hlt">Como</span> ayudar a los padres a prevenir el envenenamiento por plomo (Helping Parents Prevent Lead Poisoning). ERIC Digest.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Binns, Helen J.; Ricks, Omar Benton</p> <p></p> <p>Children are at greater risk than adults for lead poisoning because children absorb lead more readily than adults, and a small amount of lead in children's bodies can do a great deal of harm. This Spanish-language Digest summarizes some of the causes and effects of childhood lead poisoning and suggests some lead poisoning prevention strategies…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=14+AND+day+AND+rule&pg=2&id=ED429659','ERIC'); return false;" href="http://eric.ed.gov/?q=14+AND+day+AND+rule&pg=2&id=ED429659"><span>How To Start a Family Day Care = <span class="hlt">Como</span> Iniciar una Guarderia en El Hogar. [Videotape and Viewer's Guide].</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Raphael, Doris; Weisman, Douglas</p> <p></p> <p>Being a family day care provider is work that requires professional responsibilities and attention to the physical, emotional, and educational well-being of children; listening and responding to parents; and running a business. This videotape, in English- and Spanish-language versions, explores the elements involved in starting up a family day…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/22188886','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/22188886"><span>[Rabdomiosarcoma primario de corazón <span class="hlt">como</span> causa de síncope recurrente en el adulto].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Díaz-Pérez, Julio Alexander; Gómez-Arbeláez, Diego; Hurtado-Gomez, Gabriel Alexander</p> <p>2011-01-01</p> <p>Primary or secondary neoplasms can affect the heart. Secondary are more common. However, primary neoplasms are relevant because is a group with diverse genesis, behavior, treatment and clinical manifestations. We present a case of a 45 year-old woman, with recurrent syncope started 1 year before her first consult. She had palpitations and chest pain. Echocardiography identified a left atrium mass of 2.1x1.8 cm. Endomyocardial biopsy document a primary rhabdomyosarcoma of the heart. The patient dies after a overall-survival of 22 months. This case presented had a good study of its symptoms with an accurate diagnosis and early treatment, which provided prolonged survival of this rare and aggressive neoplasm.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED469317.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED469317.pdf"><span><span class="hlt">Como</span> los colegios asignan y utilizan sus recursos? (How Schools Allocate and Use Their Resources). ERIC Digest.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Picus, Lawrence O.</p> <p></p> <p>School finance has traditionally concentrated on the distribution of resources to school districts, focusing primarily on the equitable distribution of funds within a state. In recent years, more attention has been paid to the issue of productivity--how effectively school districts use the funds they receive to provide education to students. This…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED046270.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED046270.pdf"><span>"Tras de un Amoroso Lance" <span class="hlt">como</span> Estructura Expresiva (The Poem, "Behind the Amorous Cast" as an Expressive Structure).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Bratosevich, Nicolas</p> <p>1967-01-01</p> <p>An analysis of a poem by San Juan de la Cruz (St. John of the Cross), the sixteenth century Spanish mystic, identifies symbols and images, explains themes, and offers a synthesis of his structural patterns. The poem, "Tras de amoroso lance", deals with the theme of the search of the beloved (i.e., the soul) for the lover, and…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2010PhDT........55N','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2010PhDT........55N"><span>Estudio de generacion de energia con celdas de combustible con membrana poly diallydimethylammonium chloride (PDADMAC) <span class="hlt">como</span> polimero de intercambio protonico</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Nino Galeano, Miguel Angel</p> <p></p> <p>Fuel cells were built with poly diallydimethylammonium chloride or PDADMAC (by its initials in English) as proton exchange membrane and were compared with earlier studies of fuel cells constructed by other methods and / or materials. Also copper, aluminum and nickel were used as electrodes in the electrode membrane ensamble in search of the best performance operational cell. The results of the current were used to justify the use of PDADMAC membranes in 40% volume-volume ratio in different combinations of metals Cu-Al, Ni-Al as electrodes. For the study of conduction performance of membrane electrode ensambles (MEA), copper and aluminum were as cathode and anode for their active behavior as functional electrodes in the experimental cell, walling individually membrane types PDADMAC, PDADMAC + Buffer, PDADMAC + deionized water and PDADMAC + tap water.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED404849.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED404849.pdf"><span>Contextualizacion y "Expresiones Pragmaticas": "Che" <span class="hlt">como</span> Senal de Marco (Contextualization and "Pragmatic Expressions": "Che" as Deictic Marker).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Carranza, Isolda</p> <p></p> <p>The pragmatic expressions of Argentine Spanish (e.g., "bueno, viste, no? mira") are defined as deictic signals. They are deictic because they indicate elements of the communicative situation: transitions between text segments, conversational roles, or the social relationship between participants. They also signal contextual suppositions…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1997BAAA...41...56F','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1997BAAA...41...56F"><span>Las líneas de aluminio neutro <span class="hlt">como</span> diagnóstico cromosférico</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Fernández Borda, R.; Mauas, P. J. D.</p> <p></p> <p>Se presenta un modelo atómico para el cálculo de las lí neas del Aluminio neutro que se forman en la cromósfera solar. En particular, se estudia la línea λ 3961 Å, que, por estar muy próxima a la lí nea H del Ca II y a Hɛ es muy frecuentemente observada. Observaciones en esta lí nea obtenidas con el espectrógrafo a instalarse en el CASLEO, serán utilizadas para el estudio de fulguraciones solares.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.dtic.mil/docs/citations/ADA258161','DTIC-ST'); return false;" href="http://www.dtic.mil/docs/citations/ADA258161"><span>International Workshop on Mathematical Methods in Combustion Held in <span class="hlt">Como</span>, Italy on 18-22 May 1992</span></a></p> <p><a target="_blank" href="http://www.dtic.mil/">DTIC Science & Technology</a></p> <p></p> <p>1992-05-01</p> <p>Colombo Mr. Ugo Scaglione Mathematical Methods in Combustion Monday, 18 May 1992 Villa Olmo, Room ’ Olimpo " 08.30 Registration 09.15 L De Luca, R...Villa Olmo, Room " Olimpo " 8.50 L. De Luca Introductory Remarks NUMERICAL FUNDAMENTALS M.K. Strelets chairman 09.00 E.S. Oran Limitations and...Villa Olmo, Room " Olimpo " 08.50 L. De Luca Introductory Remarks LINEAR COMBUSTION STABILITY A.G. Merzhanov chairman 09.00 B.V. Novozhilov Combustion</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/EJ1051655.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/EJ1051655.pdf"><span>The English as a Foreign Language/Lingua Franca Debate: Sensitising Teachers of English as a Foreign Language towards Teaching English as a Lingua Franca (El debate del inglés <span class="hlt">como</span> lengua extranjera o <span class="hlt">como</span> lengua franca: sensibilización de docentes de inglés <span class="hlt">como</span> lengua extranjera hacia la enseñanza del inglés <span class="hlt">como</span> lengua franca)</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Mansfield, Gillian; Poppi, Franca</p> <p>2012-01-01</p> <p>The function of English as a lingua franca for communication needs rethinking in the teaching of English as a foreign language classroom as a consequence of globalisation. The present contribution is an empirical study carried out in an Italian university environment which aims to show how teachers should take on board awareness raising activities…</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_16");'>16</a></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li class="active"><span>18</span></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_18 --> <div id="page_19" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li class="active"><span>19</span></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="361"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED064976.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED064976.pdf"><span>Caracteristicas de la Instruccion Programada <span class="hlt">como</span> Tecnica de Ensenanza (Characteristics of Programed Instruction as a Teaching Technique).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Dorrego, Maria Elena</p> <p></p> <p>This discussion of programed instruction begins with the fundamental psychological aspects and learning theories behind this teaching method. Negative and positive reinforcement, conditioning, and their relationship to programed instruction are considered. Different types of programs, both linear and branching, are discussed; criticism of the…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=materia&id=EJ175806','ERIC'); return false;" href="http://eric.ed.gov/?q=materia&id=EJ175806"><span>La Traduccion Simultanea <span class="hlt">como</span> Materia en Una Carrera de Lenguas (Simultaneous Translation as a Course in a Foreign Language Program)</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Bradley, D.</p> <p>1977-01-01</p> <p>A description of the foreign language curriculum at the university level in which courses in simultaneous translation are required. The size and composition of the groups are described as well as methods used to develop skill in translating and interpreting. Results are assessed. (Text is in Spanish.) (AMH)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=hogar&id=ED429659','ERIC'); return false;" href="https://eric.ed.gov/?q=hogar&id=ED429659"><span>How To Start a Family Day Care = <span class="hlt">Como</span> Iniciar una Guarderia en El Hogar. [Videotape and Viewer's Guide].</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Raphael, Doris; Weisman, Douglas</p> <p></p> <p>Being a family day care provider is work that requires professional responsibilities and attention to the physical, emotional, and educational well-being of children; listening and responding to parents; and running a business. This videotape, in English- and Spanish-language versions, explores the elements involved in starting up a family day…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2017JaJAP..56fGE08K','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2017JaJAP..56fGE08K"><span>Characterization of coke, or carbonaceous matter, formed on <span class="hlt">CoMo</span> catalysts used in hydrodesulfurization unit in oil refinery</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Kimura, Nobuharu; Iwanami, Yoshimu; Koide, Ryutaro; Kudo, Reiko</p> <p>2017-06-01</p> <p>When a mixture of light gas oil (LGO) and light cycle oil is fed into an oil refinery’s hydrodesulfurization (HDS) unit to produce diesel fuel, the catalyst in the HDS unit is rapidly deactivated. By contrast, when the feed is LGO mixed with residue desulfurization gas oil, the catalyst is deactivated slowly. Hoping to understand why, the authors focused on the coke formed on the catalysts during the HDS reaction. The result of a comprehensive analysis of the coke suggested that the ways coke formed and grew on the catalysts may differ depending on the feeds used, which in turn could affect the deactivation behaviors of the catalysts.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED397971.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED397971.pdf"><span>How Can We Provide Safe Playgrounds? = <span class="hlt">Como</span> podemos proveer lugares con juegos infantiles que no sean peligrosos para los ninos?</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>ACCESS ERIC, Rockville, MD.</p> <p></p> <p>Outdoor playgrounds can be exciting places where children explore their environment and develop motor and social skills; however, they can also pose serious safety hazards. With the exception of California, no mandatory state or federal standards currently exist regarding manufacture or installation of playground equipment or surfaces. The…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28627194','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28627194"><span></span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Martín-González, M Candelaria; Torres-Vega, Ana María; González-Reimers, Emilio; Quintero-Platt, Geraldine; Fernández-Rodríguez, Camino; Alvisa-Negrín, Julio; Hawari-Meilud, Adnan; Santolaria-Fernández, Francisco</p> <p>2017-06-05</p> <p>Introducción: en Canarias existe una elevada prevalencia de factores de riesgo vascular, superior a la del resto de España.Objetivo: analizar las características clínicas de 300 adultos diabéticos tipo II de El <span class="hlt">Hierro</span>, en el Archipiélago Canario.Métodos: los pacientes fueron valorados en la Unidad de Medicina Interna del hospital entre 1982 a 2010, y seguidos hasta diciembre de 2014 o hasta su fallecimiento. La muestra se compone de 154 mujeres y 156 hombres (52%).Resultados: la edad media fue de 66.40 ± 11,60 años, con un tiempo medio de seguimiento de 11,04 ± 4,93 años, y el 80,3% fue diagnosticados de síndrome metabólico, significativamente más frecuente entre las mujeres (86,43% vs.74,67%; χ2 = 5,62, p = 0,018). Durante el periodo de seguimiento 51 pacientes murieron, y una proporción significativa desarrolló nuevas complicaciones cardiovasculares, <span class="hlt">como</span> insuficiencia cardiaca (6,7%), cardiopatía isquémica (17,3%), fibrilación auricular (14,3%), ictus (4,7%), o enfermedad arterial periférica (6,9%). Mediante análisis de regresión de Cox observamos que, aunque la edad avanzada fue el factor principal implicado en el desarrollo de todas estas complicaciones y en la mortalidad, los niveles bajos de colesterol se relacionaron con el desarrollo de cardiopatía isquémica y de mortalidad, resultados que no eran dependientes del consumo de estatinas (<span class="hlt">como</span> en otros ejemplos de epidemiología inversa). El consumo de etanol se relacionó con la incidencia de la enfermedad arterial periférica.Conclusiones: la edad avanzada fue el factor principal implicado en el desarrollo de complicaciones y mortalidad. Además, los niveles bajos de colesterol se relacionaron con el desarrollo de cardiopatía isquémica y mortalidad.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28236794','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28236794"><span>Pharmaceutical care practice in patients with chronic kidney disease.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Arroyo Monterroza, Dadier Antonio; Castro Bolivar, José Francisco</p> <p>2017-03-01</p> <p>Introducción: El impacto de la insuficiencia renal crónica en la salud ya dejó de ser solo un <span class="hlt">problema</span> paciente-médico, no solo por el aumento del número de pacientes diagnosticados, sino por el costo humano y económico que ocasiona en los sistemas de salud. Es por ello que la Atención Farmacéutica debe incluir procedimientos normalizados de trabajo que se encuentren estructurados por criterios consensuados para realizar el Seguimiento Farmacoterapéutico, que permitirá la prevención, identificación y resolución de resultados negativos asociados a la medicación en los pacientes.Objetivos: Conocer los tipos de <span class="hlt">problemas</span> relacionados con los medicamentos y los resultados negativos asociados a los medicamentos que se pueden detectar, prevenir y resolver en pacientes con insuficiencia renal crónica mediante el seguimiento farmacoterapéutico. Método: Se realizó un estudio de tipo cuasi experimental, con diseño descriptivo y retrospectivo, en 47 pacientes hospitalizados, diagnosticados de Insuficiencia Renal Crónica, en una clínica de alta complejidad, empleando la metodología DADER. Se analizaron sus tratamientos farmacológicos y se verificaron si estos fueron necesarios, efectivos y seguros, teniendo en cuenta variables <span class="hlt">como</span> los resultados negativos asociados a la medicación, los <span class="hlt">problemas</span> relacionados con la medicación, las intervenciones farmacéuticas y los estadios de la insuficiencia renal.Resultados: Se detectaron 51 resultados negativos asociados a la medicación durante el estudio, el 13,72% fueron de necesidad, el 45,1% de efectividad y el 41,18% de seguridad. Se realizaron un total de 41 intervenciones farmacéuticas, 35 fueron aceptadas y 6 no fueron aceptadas; de estas 6 intervenciones no aceptadas, 3 <span class="hlt">problemas</span> de salud no se solucionaron, se realizaron 12 reajustes de dosis, siendo el cefepime el medicamento con mayor número de reajustes. El mayor número de pacientes se encontraban en el estadio III y V</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26262721','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26262721"><span>[THE CASE OF ENTERAL NUTRITIONAL SUPPORT TUBE IN COLOMBIA: INSTITUTIONAL COORDINATION PROBLEMS].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Pinzón-Espitia, Olga Lucia; Chicaiza-Becerra, Liliana; Garcia-Molina, Mario; González-Rodríguez, Javier Leonardo</p> <p>2015-07-01</p> <p>Introducción: el presente artículo estudia el caso de la prescripción del soporte nutricional enteral por sonda en Colombia, analizada desde el marco del Sistema de Seguridad Social en Salud, y lo explica <span class="hlt">como</span> resultado de un <span class="hlt">problema</span> de coordinación institucional. Para ello se identifican el papel y los incentivos de los distintos agentes y se muestra cómo la interacción de los mismos desincentiva el uso de la nutrición enteral, en casos en los que esta es necesaria, con su correspondiente efecto clínico para el paciente y el aumento de costes para el sistema. Métodos: análisis de los efectos que puede tener en la práctica clínica el <span class="hlt">problema</span> de la coordinación institucional de los entes reguladores del país. Analiza su origen y los incentivos e intereses de los distintos agentes involucrados, previa síntesis de la revisión bibliográfica pertinente. Se realizó la búsqueda en las siguientes bases de datos: PubMed, Medline, ScienceDirect y Embase. Conclusiones: la situación actual del soporte nutricional enteral en Colombia es un equilibrio subóptimo, resultado de un <span class="hlt">problema</span> de coordinación institucional que solo puede ser resuelto cuando los agentes miren más allá de sus incentivos locales, ya que el soporte nutricional es un componente fundamental de la atención hospitalaria y se constituye en un medio para lograr el objetivo de la salud de la población atendida.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2005LPI....36.1014J','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2005LPI....36.1014J"><span>Fast-Turnoff Transient Electromagnetic (TEM) Field Study at the Mars Analog Site of Rio Tinto, Spain</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Jernsletten, J. A.</p> <p>2005-03-01</p> <p>This report describes a Fast-Turnoff Transient Electromagnetic (TEM) study at the Peña de <span class="hlt">Hierro</span> ("Berg of Iron") field area of the Mars Analog Research and Technology Experiment (MARTE), near the towns Rio Tinto and Nerva, Andalucia region, Spain.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/12470938','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/12470938"><span>Phylogeography of pipistrelle-like bats within the Canary Islands, based on mtDNA sequences.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Pestano, J; Brown, R P; Suárez, N M; Fajardo, S</p> <p>2003-01-01</p> <p>Evolution of three Canary Island Vespertilionid bat species, Pipistrellus kuhlii, Pipistrellus maderensis, and Hypsugo savii was studied by comparison of approximately 1 kbp of mtDNA (from cytochrome b and 16S rRNA genes) between islands. mtDNA reveals that both P. kuhlii and P. maderensis exist in sympatry on Tenerife (and possibly other islands). Their morphological similarity explains why their co-occurrence had not been detected previously. Levels of sequence divergence are quite low within P. maderensis. Haplotypes were either identical or separated by </=2 mutational steps on two of the islands (La Gomera and El <span class="hlt">Hierro</span>). However there is sufficient between-island divergence between haplotypes from Tenerife, La Palma, and La Gomera/El <span class="hlt">Hierro</span> to suggest that they could represent three evolutionary significant units (ESU). H. savii has an overlapping island distribution but a contrasting phylogeographical pattern. Most significantly, sequence divergence is greatest between La Gomera and El <span class="hlt">Hierro</span> (>/=12 mutational steps) indicating colonization of the latter from the former sometime during the last approximately 1.2 Ma, with low subsequent gene flow. Unlike P. maderensis the El <span class="hlt">Hierro</span> population alone appears to represent an ESU. The H. savii haplotypes detected in Gran Canaria and Tenerife are identical or separated by 1 mutational step.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.dtic.mil/docs/citations/ADA542167','DTIC-ST'); return false;" href="http://www.dtic.mil/docs/citations/ADA542167"><span>Acoustic Detection, Behavior, and Habitat Use of Deep-Diving Odontocetes</span></a></p> <p><a target="_blank" href="http://www.dtic.mil/">DTIC Science & Technology</a></p> <p></p> <p>2010-09-30</p> <p>Biologia Marina, Alicante, Sept. 2010. Escanez A., Guerra A., Gonzalez A., Landeira J., Vicente A., Arranz P., Aguilar N., "Cefalopodos...mesopelagicos capturados en las islas de El <span class="hlt">Hierro</span> u Tenerife durante la campana Zifiocal-I", Sociedad Iberico de Estudios de Biologia Marina, Alicante, Sept</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2003BASBr..23..208D','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2003BASBr..23..208D"><span>Determinação de regiões de órbitas diretas estáveis ao redor da Lua</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>de Melo, C. F.; Winter, O. C.; Vieira Neto, E.</p> <p>2003-08-01</p> <p>Neste Trabalho estamos investigando regiões do sistema Terra-Lua que contêm órbitas diretas estáveis ao redor da Lua visando a utilização destas órbitas em futuras missões de veículos espaciais <span class="hlt">como</span> alternativas de trajetórias com baixo custo de manutenção. Adotando-se o <span class="hlt">problema</span> restrito de três corpos, Terra-Lua-partícula, a localização e a extensão destas regiões de estabilidade foram investigadas numericamente considerando <span class="hlt">como</span> estável toda órbita que permanece ao redor a Lua por, no mínimo, 1000 dias com energia de dois corpos da partícula em relação à Lua negativa. A estabilidade de tais regiões está associada a duas famílias de órbitas periódicas simples H1 e H2 e a órbitas quase-periódicas associadas a elas. Uma vez identificadas as regiões de estabilidade passamos a analisá-las introduzindo, paulatinamente, outras interações relevantes ao sistema <span class="hlt">como</span> as perturbações do Sol (via <span class="hlt">problema</span> restrito de quatro corpos), das marés, da pressão de radiação e do achatamento terrestre. Os resultados encontrados até o momento mostram que a perturbação do Sol é a única que reduz significativamente o tamanho das regiões de estabilidade. Também estamos investigando o comportamento de tais regiões quando características intrínsecas do sistema <span class="hlt">como</span> as excentricidades das órbitas da Terra e da Lua e a inclinação da órbita Lua são consideradas. Com este estudo estamos reunindo informações que nos permitirão compreender a evolução das regiões de estabilidade no sistema Terra-Lua, bem <span class="hlt">como</span> estabelecer parâmetros adequados para a utilização das trajetórias estáveis em futuras missões espaciais. Agradecimentos: Este projeto conta com o apoio do CNPq, da Capes e da Fapesp.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27792689','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27792689"><span>[80 years of soial service in medicine].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p></p> <p></p> <p>Hace 80 años, la Escuela de Medicina de la Universidad Nacional, en voz de su director, Gustavo Baz Prada, hizo una propuesta que pronto se convirtió en realidad y finalmente en norma, la que desde entonces se conoce <span class="hlt">como</span> SS. Esta iniciativa se vio <span class="hlt">como</span> una manera para que los estudiantes de medicina del último año retribuyeran a la sociedad una parte de lo que esta invirtió en su educación, consolidaran su formación mediante la exposición a las realidades de todos los días en los medios más necesitados, se pusieran a prueba sobre sus verdaderas capacidades para atender pacientes y participaran en la solución de un <span class="hlt">problema</span> de atención sanitaria que en ese entonces era mucho más apremiante que ahora. Unos años después, los recién egresados de otras licenciaturas (pasantes) también fueron incorporados a esta estrategia y, al fin, se reconoció formalmente <span class="hlt">como</span> una responsabilidad de las instituciones educativas. Las aportaciones del SS a la salud de las personas y a la formación de los médicos han sido incuestionables, y la experiencia humana que ha representado para quienes lo han vivido ha dejado marcas indelebles.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28169413','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28169413"><span>[Efficacy of the application of kinesio tape in patients with stroke].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Ortiz-Ramirez, J; Perez-De la Cruz, S</p> <p>2017-02-16</p> <p>Objetivos. Revisar la efectividad del vendaje neuromuscular (kinesio tape) en pacientes con accidente cerebrovascular en los estudios cientificos publicados hasta la fecha y discutir estos hallazgos a la luz de lo que pueda ser de interes para la neurologia. Desarrollo. Busqueda exhaustiva en las principales bases de datos cientificas utilizando palabras clave <span class="hlt">como</span> kinesio tape, kinesiotaping y vendaje neuromuscular, asi <span class="hlt">como</span> analisis de las citas bibliograficas de los articulos seleccionados y los estudios publicados en la pagina oficial de la Asociacion Española de Vendaje Neuromuscular. Se han admitido estudios cuantitativos experimentales, cuasiexperimentales y estudios de casos, sin limite de fecha, con finalidad terapeutica del vendaje neuromuscular, y que han aportado resultados importantes. Ocho articulos han cumplido los criterios de inclusion. Existen estudios que muestran el tratamiento de los miembros inferiores, la marcha y el equilibrio con este tipo de terapia, asi <span class="hlt">como</span> de los miembros superiores, y los <span class="hlt">problemas</span> de deglucion que estos pacientes pueden presentar. Conclusion. El vendaje neuromuscular en patologia neurologica en adultos puede ser una tecnica complementaria que, empiricamente, aporta beneficios, pero aun se precisan estudios de mejor calidad metodologica que evidencien los efectos que se le atribuyen.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2004PhDT........76C','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2004PhDT........76C"><span>Investigaccion-accion en la sala de clases sobre las creencias de la cultura de la ciencia de un grupo de estudiantes universitarios y su relacion reciproca con el aprendizaje de las ciencias biologicas</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Cordova-Santiago, Lizzette Astrid</p> <p></p> <p>La investigacion---accion que se llevo a cabo en la sala de clases tenia <span class="hlt">como</span> punto de partida las creencias de la cultura de la ciencia de un grupo de estudiantes universitarios para luego examinar sus implicaciones en el proceso de aprendizaje de las Ciencias Biologicas. ¿Que se supone que hagan las creencias en relacion con el aprendizaje? ¿En que consiste incorporar este aspecto a la practica educativa universitaria? Utilizando el modelo de Kemmis y McTaggart (1987) la investigacion-accion se planteo <span class="hlt">como</span> un proceso dinamico en cuatro momentos en espiral constituidos por la planificacion, la accion, la observacion y la reflexion. Cada una de las fases tuvo una intencion retrospectiva y prospectiva formando una espiral de autorreflexion del conocimiento y la accion. Se llevaron a cabo audio grabaciones en clases y analisis de documentos. Ademas, la profesora-investigadora hizo un portafolio para reflexionar sobre las creencias de la cultura de la ciencia que tienen los estudiantes y las creencias del aprendizaje que tiene la profesora y sobre <span class="hlt">como</span> la comprension de estos elementos ayudo a mejorar su practica educativa a traves del tiempo. Los resultados obtenidos apuntan a que las creencias de la cultura de la ciencia que tiene el grupo de estudiantes son diversas. Ellos si creen que la ciencia tiene una cultura la cual describieron <span class="hlt">como</span>: complicada y desconocida que evoluciona constantemente, que es un conjunto de metodos, que es altamente tecnologica, que resuelve <span class="hlt">problemas</span> de salud, ayuda a interpretar la realidad del mundo que los rodea y su origen y que existen unas intersecciones entre la ciencia y el poder. Sobre las creencias del proceso de aprendizaje de la profesora-investigadora, estas senalan que el modelaje de actores, la vision de la academia que tiene ella asi <span class="hlt">como</span> la participacion y negociacion entre todos los involucrados en el proceso educativo, son factores que inciden en el proceso de aprendizaje.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26268132','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26268132"><span>[NEURODEGENERATIVE DISEASES; NUTRITIONAL ASPECTS].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>de Luis, Daniel A; Izaola, Olatz; de la Fuente, Beatriz; Muñoz-Calero, Paloma; Franco-Lopez, Angeles</p> <p>2015-08-01</p> <p>Introducción: las enfermedades neurodegenerativas producen alteraciones en el nivel de conciencia o en los mecanismos de la deglución que con frecuencia hacen necesario un soporte nutricional especializado. Objetivo: revisar el riesgo de desnutrición, así <span class="hlt">como</span> su tratamiento, en pacientes con enfermedad cerebral vascular, enfermedad de Parkinson, demencia y esclerosis lateral amiotrófica. Desarrollo: las enfermedades neurológicas degenerativas son una de las principales indicaciones de soporte nutricional en nuestro país. En los procesos agudos (enfermedad vascular cerebral), el correcto manejo nutricional se relaciona con una mejor evolución y con una disminución de las complicaciones. En los procesos neurodegenerativos crónicos (esclerosis lateral amiatrófica y demencia), la malnutrición es un <span class="hlt">problema</span> importante que empeora el pronóstico de estos pacientes siendo, necesario un correcto manejo de la disfagia y sus complicaciones, así <span class="hlt">como</span> la utilización de diferentes etapas de soporte nutricional. Una correcta valoración nutricional de estos pacientes, así <span class="hlt">como</span> un claro esquema de intervención nutricional, es imprescindible en el seguimiento de su enfermedad. Por último, en la enfermedad de Parkinson avanzada, el soporte nutricional, <span class="hlt">como</span> en las enfermedades neurodegenerativas anteriores, es de vital importancia, sin olvidarnos de la carga proteica y su distribución en la dieta de estos pacientes. Las sociedades científicas internacionales (American Society for Parenteral and Enteral Nutrition ASPEN) recomiendan, con un grado de evidencia B, realizar un cribaje de malnutrición a los pacientes con enfermedades neurológicas. Conclusiones: una correcta valoración nutricional, así <span class="hlt">como</span> un adecuado soporte nutricional deben formar parte del proceso diagnóstico y terapéutico de estas enfermedades.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27269214','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27269214"><span>[Not Available].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Molina Villaverde, Raquel</p> <p>2016-06-03</p> <p>El cáncer es un <span class="hlt">problema</span> sanitario de primera magnitud a escala mundial. Su tratamiento es uno de los mayores campos de innovación y desarrollo en medicina. La visión del cáncer <span class="hlt">como</span> una enfermedad sistémica, heterogénea y de una elevada complejidad hace que los enfermos deban recibir una atención oncológica de calidad, proporcionada por equipos multidisciplinares altamente cualificados. Además de la gran incidencia de malnutrición en estos pacientes, la intervención nutricional precoz puede mejorar su pronóstico, aumentar la calidad de vida y disminuir la tasa de complicaciones de la enfermedad. Por ello, es necesaria una estrecha colaboración entre el oncólogo y el experto en nutrición.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2788237','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2788237"><span>Consentimiento informado: una praxis dialogica para la investigacion</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Mondragon-Barrios, Liliana</p> <p>2009-01-01</p> <p>El consentimiento informado es un proceso, en el que una persona acepta participar en una investigation, conociendo los riesgos, beneficios, consecuencias o <span class="hlt">problemas</span> que se puedan presenter durante el desarrollo de la misma. El objetivo de este trabajo es reunir las caracteristicas del proceso de consentimiento informado (PCI) pare que su discernimiento y cumplimiento posibilite el ejercicio etc° dialogico, reflexivo y responsable del investigador. Se presentan los resultados de una extensa revision de les elementos del PCI, desde sus cornponentes hasta su fundamento etico y legal, incluyendo los mites y realidades que existen sobre el formato de consentimiento informado come recurso legal de protection. El consentimiento informado no es un formato establecido que los investigadores repliquen, se trata de que la praxis del PCI sea una tarea cotidiana dentro de la investigation con seres humanos, <span class="hlt">como</span> comunicaciOn deliberative y critica, responsable y comprometida entre dos agentes morales, investigador-investigado. PMID:19507477</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/24610692','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/24610692"><span>[Reversible porencephalic cyst related to shunt dysfunction].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Santín-Amo, José M; Rico-Cotelo, María; Serramito-García, Ramón; Gelabert-González, Miguel; Allut, Alfredo G</p> <p>2014-03-16</p> <p>Introduccion. El tratamiento quirurgico de la hidrocefalia es uno de los procedimientos quirurgicos mas habituales en la neurocirugia pediatrica, y las derivaciones ventriculoperitoneales constituyen una herramienta fundamental en el tratamiento de la hidrocefalia tanto infantil <span class="hlt">como</span> del adulto. Las complicaciones de las valvulas son relativamente frecuentes, sobre todo en la poblacion pediatrica, y, entre estas, las mas habituales incluyen: las obstrucciones, las desconexiones, el hiperdrenaje y las infecciones. Caso clinico. Niña de 7,5 años, portadora de una valvula ventriculoperitoneal, que presentaba cefalea intermitente. Un estudio con tomografia computarizada demostro una lesion quistica temporal derecha. Tras la revision valvular, la tomografia computarizada evidencio la reduccion del quiste. Conclusiones. La formacion de una cavidad porencefalica es una complicacion poco frecuente. Se relaciona con <span class="hlt">problemas</span> en el cateter distal en pacientes con ventriculos dilatados y de las que existen escasas referencias en la bibliografia.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1998BAAA...42....9B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1998BAAA...42....9B"><span></span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Brunini, A.</p> <p></p> <p>Se presenta una revisión de los conocimientos actuales sobre el proceso de acreción del sistema solar exterior. En base a nuevas y más realistas simulaciones numéricas, se analiza el impacto que tuvo dicho proceso en otras regiones del sistema solar tales <span class="hlt">como</span> la nube de Oort, el cinturón de Kuiper y el sistema solar interior. Se presentan entonces, las principales limitaciones de los modelos numéricos actuales, los principales puntos aún oscuros en el <span class="hlt">problema</span>, y algunos de los posibles caminos a seguir para mejorar nuestro conocimiento en el tema. Se discute a continuación la posible utilidad de este tipo de estudios para el diseño de estrategias de búsqueda de otros sistemas planetarios.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_17");'>17</a></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li class="active"><span>19</span></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_19 --> <div id="page_20" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li class="active"><span>20</span></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="381"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3109662','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3109662"><span>QUALITY, HEALTH SYSTEM AND GOVERNANCE. THE ARGENTINEAN CASE</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Litewka, Sergio G.</p> <p>2011-01-01</p> <p>Argentina ha sido un campo fértil para los intentos de reforma del sector salud, en la búsqueda por mejorar la calidad de sus servicios y, consecuentemente, la accesibilidad y la equidad del mismo. Los resultados obtenidos no han sido proporcionales a los esfuerzos desarrollados. Aunque la bioética debería, <span class="hlt">como</span> forma de reflexión interdisciplinaria, participar en la fundamentación de nuevas políticas sanitarias y sus efectos sobre los usuarios, parece haber permanecido ajena, en general, a los graves <span class="hlt">problemas</span> derivados de la corrupción, prefiriendo enfocarse en cuestiones vinculadas a planteos abstractos de justicia y solidaridad, atribuyendo los fracasos a la imposición de modelos económicos foráneos. PMID:21660255</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/21660255','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/21660255"><span></span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Litewka, Sergio G</p> <p>2010-11-01</p> <p>Argentina ha sido un campo fértil para los intentos de reforma del sector salud, en la búsqueda por mejorar la calidad de sus servicios y, consecuentemente, la accesibilidad y la equidad del mismo. Los resultados obtenidos no han sido proporcionales a los esfuerzos desarrollados. Aunque la bioética debería, <span class="hlt">como</span> forma de reflexión interdisciplinaria, participar en la fundamentación de nuevas políticas sanitarias y sus efectos sobre los usuarios, parece haber permanecido ajena, en general, a los graves <span class="hlt">problemas</span> derivados de la corrupción, prefiriendo enfocarse en cuestiones vinculadas a planteos abstractos de justicia y solidaridad, atribuyendo los fracasos a la imposición de modelos económicos foráneos.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/24528350','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/24528350"><span>Sociodemographic and dietary profile of 4,471 childbearing-age women planning a pregnancy.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Cuervo, Marta; Goni, Leticia; Santiago, Susana; Zazpe, Itziar; García, Aquilino; Martínez, J Alfredo</p> <p>2014-02-01</p> <p>Introducción: El mantenimiento de unos adecuados estilos de vida, es de gran importancia para la prevención de enfermedades relacionadas con el embarazo durante las primeras etapas. Por ello, es necesario conocer el estado de salud general de las mujeres en edad fértil, y poder proporcionar un asesoramiento adecuado con el objetivo de mantener o mejorar su estado nutricional. El objetivo de este estudio fue evaluar los estilos de vida de las mujeres en edad fértil que planean un embarazo y estudiar las diferencias entre mujeres primíparas y multíparas en dichos estilos de vida. Métodos: Este estudio transversal incluyó un total de 4.471 mujeres españolas en edad fértil que está planeando un embarazo. La información se recogió, a través de un cuestionario, por profesionales de oficinas de farmacia. Resultados: El perfil de las mujeres reclutadas en edad fértil que planean un embarazo fue de poco más de treinta años (31,4 ± 4,8 años) y el 72,5% estaba buscando a su primer bebé. Ellas tenían una buena percepción tanto de su estado nutricional <span class="hlt">como</span> de salud, y una dieta equilibrada pero con algunos hábitos no saludables. Cabe destacar que las mujeres primíparas presentaban menor riesgo de complicaciones relacionadas con salud pero eran mayores consumidoras de tabaco y alcohol, y menos consumidoras de leche fortificada, yodo y suplementos de <span class="hlt">hierro</span> (p < 0,05), que las mujeres multíparas. Además, la población examinada mostró un patrón más sedentario en las mujeres primíparas en comparación con las mujeres multíparas, relativo a las horas / día tumbada, sentada y de pie. Conclusión: Las diferencias entre ambos grupos (primíparas y multíparas) ofrecen una gran oportunidad para promover hábitos saludables entre las mujeres en edad fértil, de acuerdo con el perfil de paridad, con el objetivo de prevenir estilos de vida no adecuados en embarazos futuros.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4351992','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4351992"><span>CONTAMINACIÓN AMBIENTAL, VARIABILIDAD CLIMÁTICA Y CAMBIO CLIMÁTICO: UNA REVISIÓN DEL IMPACTO EN LA SALUD DE LA POBLACIÓN PERUANA</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Gonzales, Gustavo F.; Zevallos, Alisson; Gonzales-Castañeda, Cynthia; Nuñez, Denisse; Gastañaga, Carmen; Cabezas, César; Naeher, Luke; Levy, Karen; Steenland, Kyle</p> <p>2015-01-01</p> <p>RESUMEN El presente artículo es una revisión sobre la contaminación del agua, el aire y el efecto del cambio climático en la salud de la población peruana. Uno de los principales contaminantes del aire es el material particulado menor de 2,5 μ (PM 2,5), en la ciudad de Lima, anualmente 2300 muertes prematuras son atribuibles a este contaminante. Otro <span class="hlt">problema</span> es la contaminación del aire domiciliario por el uso de cocinas con combustible de biomasa, donde la exposición excesiva a PM 2,5 dentro de las casas es responsable de aproximadamente 3000 muertes prematuras anuales entre adultos, con otro número desconocido de muertes entre niños debido a infecciones respiratorias. La contaminación del agua tiene <span class="hlt">como</span> principales causas los desagües vertidos directamente a los ríos, minerales (arsénico) de varias fuentes, y fallas de las plantas de tratamiento. En el Perú, el cambio climático puede impactar en la frecuencia y severidad del fenómeno de El Niño oscilación del sur (ENSO) que se ha asociado con un incremento en los casos de enfermedades <span class="hlt">como</span> cólera, malaria y dengue. El cambio climático incrementa la temperatura y puede extender las áreas afectadas por enfermedades transmitidas por vectores, además de tener efecto en la disponibilidad del agua y en la contaminación del aire. En conclusión, el Perú, pasa por una transición de factores de riesgo ambientales, donde coexisten riesgos tradicionales y modernos, y persisten los <span class="hlt">problemas</span> infecciosos y crónicos, algunos de los cuales se asocian con <span class="hlt">problemas</span> de contaminación de agua y de aire. PMID:25418656</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27238792','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27238792"><span>[In Process Citation].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Muros, José Joaquín; Cofre-Bolados, Cristian; Zurita-Ortega, Félix; Castro-Sánchez, Manuel; Linares-Manrique, Marta; Chacón-Cuberos, Ramón</p> <p>2016-03-25</p> <p>Introducción: la sociedad actual está experimentando reducciones significativas en los niveles de actividad física, y estos niveles de sedentarismo están asociados a un aumento de la obesidad. Objetivo: describir y analizar las relaciones entre composición corporal, realización de actividad física y condición física, además de describir los índices de sobrepeso/obesidad de una muestra de escolares de la provincia de Santiago (Chile). Material y métodos: se diseñó un estudio transversal con una muestra representativa de 515 alumnos (10,6 ± 0,5). Se determinaron diferentes índices antropométricos (IMC y porcentaje graso), así <span class="hlt">como</span> la actividad física y la condición física (capacidad aeróbica y fuerza muscular máxima en tren superior e inferior). Resultados: alrededor del 55% de la muestra estudiada presentó <span class="hlt">problemas</span> de sobrepeso/obesidad. Los valores de volumen de oxígeno máximo (VO 2 máx) y fuerza del tren superior fueron estadísticamente superiores en el grupo de los niños que en el de las niñas. Los alumnos clasificados <span class="hlt">como</span> obesos presentaron unos niveles superiores de porcentaje graso, así <span class="hlt">como</span> unos niveles inferiores de actividad física y de condición física que el grupo con normopeso. Se encontró una correlación negativa entre las puntuaciones del PAQ-C (Physical Activity Questionnaire for Older Children) y los parámetros antropométricos, así <span class="hlt">como</span> entre los parámetros antropométricos y los valores obtenidos en todas las pruebas de condición física. Conclusión: ante los alarmantes niveles de sobrepeso y obesidad infantil detectados en Santiago parece de importante relevancia crear planes de intervención centrados en la mejora de la condición física; los grupos con <span class="hlt">problemas</span> de sobrepeso y obesidad y los grupos de sexo femeninos donde se debería hacer una mayor incidencia.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28273229','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28273229"><span>Setting health priorities in a community: a case example.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Sousa, Fábio Alexandre Melo do Rego; Goulart, Maria José Garcia; Braga, Antonieta Manuela Dos Santos; Medeiros, Clara Maria Oliveira; Rego, Débora Cristina Martins; Vieira, Flávio Garcia; Pereira, Helder José Alves da Rocha; Tavares, Helena Margarida Correia Vicente; Loura, Marta Maria Puim</p> <p>2017-03-02</p> <p> ativo, concebeu-se um processo de estabelecimento de prioridades a fim de selecionar o <span class="hlt">problema</span> prioritário para intervenção. O processo integrou quatro etapas sucessivas de análise e classificação dos <span class="hlt">problemas</span>: (1) agrupamento por nível de similitude, (2) classificação de acordo com critérios epidemiológicos, (3) ordenação por peritos e (4) aplicação do método de Hanlon. No decurso destas etapas, combinaram-se, de forma integrada, as perspetivas dos profissionais da equipe de saúde, de peritos em enfermagem comunitária e gerontologia e da própria comunidade. Na primeira etapa, agruparam-se por nível de similitude os <span class="hlt">problemas</span> identificados, constituindo-se um corpo de 19 <span class="hlt">problemas</span> para análise. Na segunda, esses <span class="hlt">problemas</span> foram classificados pelos elementos da equipe de saúde, mediante a aplicação de critérios de cariz epidemiológico (magnitude, vulnerabilidade e transcendência). Os nove <span class="hlt">problemas</span> mais relevantes resultantes da operacionalização da segunda etapa do processo foram submetidos a análise por peritos, e selecionados os cinco <span class="hlt">problemas</span> com maior pertinência de atuação. Na última etapa, com recurso à participação de líderes formais e informais da comunidade, identificou-se o <span class="hlt">problema</span> prioritário para intervenção nessa comunidade específica: a Baixa Interação Social na Participação Comunitária. O processo de estabelecimento de prioridades é uma etapa fundamental do planejamento em saúde, permitindo identificar os <span class="hlt">problemas</span> prioritários a intervir numa determinada comunidade e num determinado momento. Não existem fórmulas predeterminadas para a seleção de <span class="hlt">problemas</span> prioritários. Cabe a cada equipe de intervenção comunitária a definição de um processo próprio com diferentes métodos/técnicas que possibilitem a identificação e intervenção em necessidades classificadas <span class="hlt">como</span> prioritárias pela comunidade.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/23808436','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/23808436"><span>Iron (FeSo4) bioavailability in obese subjects submitted to bariatric surgery.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Bueno, Luciana; Pizzo, Juliana C; Marchini, Julio Sergio; Dutra-de-Oliveira, José Eduardo; Dos Santos, José Ernesto; Barbosa Junior, Fernando</p> <p>2013-01-01</p> <p>Objetivo: Obesos sometidos a cirugía bariátrica muestran la utilización de deterioro de <span class="hlt">hierro</span>. Evaluar la biodisponibilidad del <span class="hlt">hierro</span> en los obesos por el consumo de suplemento nutricional que contiene múltiples nutrientes antes y después de seis meses de la cirugía bariátrica. Material y Métodos: El estudio incluyó a 14 voluntarios antes y después de la cirugía bariátrica que recibieron formulaciones que contienen múltiples nutrientes y medir las concentraciones séricas de <span class="hlt">hierro</span> en ayunas y cada 1 hora después de la ingestión de formulaciones, con un total de cuatro horas. Resultados: Ferremia por el consumo de entre dos formulaciones de pre-y post-operatorios fueron: El ayuno 104.50 (70,00-363,00) mg / dl y 198.00 (38.00 a 617.00) mg / dl, 103.00 horas (63,00 a 305,00) mg / dl y 160.00 (11,00- 206,90) mg / dL, 2 horas 102.50 (62.00 a 150.00) mg / dL y 141.30 (10.00 a 412.20) mg / dl, 3 horas 97.00 (63.00 a 190.00) mg mg / dl y 153,00 (6,00 hasta 269,60) / dl , 4 horas 91,00 (58,00 a 163,00) mg / dl y 156.10 (40.00 a 250.50) mg / dl y no hubo asociación estadísticamente significativa entre los dos períodos para los niveles de <span class="hlt">hierro</span> suero. Los valores de la zona de las curvas en el suero fueron 453,50 ± 202,80 mg / dl / hora, p = 0,000 y 579,00 ± 380,30 mg / dl / hora, p = 0,007 y fue estadísticamente diferente entre los dos períodos. La biodisponibilidad del <span class="hlt">hierro</span> en soluciones que contienen múltiples nutrientes se vio afectada antes y después de seis meses de la cirugía bariátrica. Conclusión: Se encontró que los niveles se redujeron ferremia con la cirugía, que puede poner en peligro estos pacientes presentaron deficiencia de <span class="hlt">hierro</span>.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28244785','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28244785"><span></span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Rodríguez-Martín, Beatriz; Castillo, Carlos Alberto</p> <p>2017-02-01</p> <p>Introducción: aunque el consumo de hidratos de carbono es un factor clave para alcanzar un óptimo rendimiento deportivo, los niveles de ingesta parecen cuestionados por algunos deportistas amateurs, que llegan a desarrollar una aversión irracional por los hidratos de carbono conocida <span class="hlt">como</span> "carbofobia". Por otro lado, la alimentación es origen de comunidades virtuales erigidas <span class="hlt">como</span> fuente de conocimiento e intercambio de información, aunque apenas se ha analizado la influencia de estas en los comportamientos alimentarios.Objetivos: conocer las conceptualizaciones sobre el consumo de hidratos de carbono y los patrones alimentarios relacionados con la carbofobia a través de la actividad en Twitter de aficionados a la práctica deportiva.Métodos: estudio cualitativo diseñado desde la Etnografía Virtual de Hine. Realizamos una inmersión virtual en cuentas en abierto de la red social Twitter en una muestra teórica de tuits de aficionados al deporte. Se realizó un análisis del discurso de la información narrativa de tuits mediante los procesos de codificación abierta, axial y selectiva y el método de comparación constante. Resultados: del análisis emergen cuatro grandes categorías que retratan las conceptualizaciones sobre los hidratos de carbono: los hidratos de carbono <span class="hlt">como</span> sospechosos o culpables del estancamiento en el entrenamiento y de los <span class="hlt">problemas</span> con el peso, la carbofobia <span class="hlt">como</span> estilo de vida, la carbofobia <span class="hlt">como</span> religión y la relación amor/odio con los hidratos de carbono. Conclusiones: la dieta baja en hidratos de carbono, o carente de ellos, es considerada <span class="hlt">como</span> un estilo de vida saludable en algunos aficionados a la práctica deportiva. Los resultados de este estudio ponen de manifiesto el poder de herramientas de comunicación virtual <span class="hlt">como</span> Twitter para apoyar, fomentar y mantener conductas alimentarias no frecuentes y no siempre saludables. Futuros estudios deben seguir profundizando en el contexto en el que aparecen estas prácticas.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26667695','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26667695"><span>[MATERNAL DIABETES MELLITUS AND ITS IMPACT ON CHILD NEURODEVELOPMENT; SYSTEMATIC REVIEW].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Aguilar Cordero, María José; Baena García, Laura; Rodríguez Blanque, Raquel; Latorre García, Julio; Mur Villar, Norma; Sánchez López, Antonio Manuel</p> <p>2015-12-01</p> <p>Introducción: en la actualidad, la diabetes se ha convertido en un <span class="hlt">problema</span> de salud mundial. Las consecuencias que conlleva, tanto a corto <span class="hlt">como</span> a largo plazo, hacen necesarios más estudios y conocimientos para su detección, control y tratamiento. Además, su prevalencia va en aumento, tanto en la población general <span class="hlt">como</span> en las mujeres embarazadas. Se han descrito numerosos efectos en los bebés de madres diabéticas, tales <span class="hlt">como</span> macrosomía fetal, hipoglucemia y un riesgo mayor de desarrollar obesidad en el futuro. Esta patología puede tener efectos negativos en el desarrollo neurológico del niño, pudiendo afectar a su capacidad intelectual, aumentando así las alteraciones cognitivas. Objetivo: analizar los estudios que han investigado la relación existente entre la diabetes mellitus durante el embarazo y su influencia en el neurodesarrollo del niño a corto y largo plazo. Métodos: se lleva a cabo una búsqueda sistemática y se seleccionan 20 artículos específicos sobre el tema, siguiendo las directrices PRISMA. Resultados: en los estudios consultados cabe destacar una gran variedad metodológica, tanto en los instrumentos y escalas de valoración cognitiva <span class="hlt">como</span> en la edad en la que se estudia la muestra. Sin embargo, la mayor parte de los investigadores concluyen que la diabetes materna puede tener consecuencias en el niño, tanto a corto <span class="hlt">como</span> a largo plazo. También se describe una mayor tasa de obesidad, intolerancia a la glucosa, trastornos cardiovasculares y metabólicos y afectación del neurodesarrollo, pues aumentan los trastornos neuroconductuales y la discapacidad intelectual. Conclusiones: la mayoría de los estudios consultados coinciden en describir alteraciones del desarrollo neurológico en los hijos de madres diabéticas, tanto en la capacidad cognitiva <span class="hlt">como</span> en las áreas concretas relacionadas con el lenguaje expresivo, las relaciones sociales, las habilidades gráficas y el desarrollo psicomotor. Asimismo, otros trabajos de investigaci</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3395996','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3395996"><span>Esquizofrenia y trastorno en el consumo de sustancias: prevalencia y characterísticas sociodemográficas en la población Latina</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Jiménez-Castro, Lorena; Raventós-Vorst, Henriette; Escamilla, Michael</p> <p>2012-01-01</p> <p>El interés por comprender la co-morbilidad de la esquizofrenia y el trastorno en el uso de sustancias, ha aumentado debido al incremento de este diagnóstico, a los efectos negativos observados en el sujeto y a los costos en los servicios de salud. Este trastorno dual puede tener efectos dramáticos en el curso clínico del trastorno psicótico tales <span class="hlt">como</span>: mayores recaídas, re-hospitalizaciones, síntomas más severos, no adherencia al tratamiento antipsicótico, cambios marcados del humor, aumento en el grado de hostilidad e ideación suicida, así <span class="hlt">como</span> alteraciones en otras áreas del funcionamiento incluyendo violencia, victimización, indigencia y <span class="hlt">problemas</span> legales. La literatura proveniente en particular de Estados Unidos y Europa sugiere que el rango de prevalencia para este diagnóstico puede oscilar entre el 10% hasta el 70%. En este estudio, revisamos la prevalencia del diagnóstico dual de esquizofrenia y trastorno en el uso sustancias, así <span class="hlt">como</span> sus características sociodemográficas, con base en la literatura disponible alrededor del mundo dando énfasis en la poblacion latina. A pesar de que este diagnóstico es ampliamente aceptado, se conoce poco sobre su prevalencia en la población latina, sobre los factores ambientales, demográficos, clínicos y otras características de estos individuos. Un mejor conocimiento sobre este diagnóstico permitiría mejorar los métodos para la detección y adecuada valoración del trastorno en el uso de sustancias en personas con trastornos metales severos <span class="hlt">como</span> la esquizofrenia. PMID:21404151</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/24972461','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/24972461"><span>[Accelerometer description as a method to assess physical activity in different periods of life; systematic review].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Aguilar Cordero, M J; Sánchez López, A M; Guisado Barrilao, R; Rodríguez Blanque, R; Noack Segovia, J; Pozo Cano, M D</p> <p>2014-06-01</p> <p>Introducción: La acelerometría, se muestra <span class="hlt">como</span> una de las técnicas más fiables, en el registro y almacenamiento de la cantidad y el nivel de actividad física, realizada por cada persona y en un periodo de tiempo determinado. Objetivo: Esta revisión tiene <span class="hlt">como</span> objetivo describir y analizar los principales artículos que utilizan este método para valorar la actividad física. Método: Los artículos seleccionados para ser incluidos en esta revisión se identificaron a través de los siguientes motores de búsqueda especializados: SCOPUS, PUBMED, GOOGLE SCHOLAR; con un total de 56 artículos. La validez de los artículos estuvo dada por el grado de evidencias demostrado, por las recomendaciones que describen y por la aplicabilidad a nuestro contexto. Esta revisión ha considerado los estudios que evalúan la actividad física a través de acelerómetros. Resultados: Los resultados demuestran que este método se puede utilizar en edades comprendidas entre 3 y 90 años. También se puede utilizar en personas con sobrepeso/ obesidad, con lesiones articulares, niños con síndrome de Down, autistas, así <span class="hlt">como</span> personas con <span class="hlt">problemas</span> psicológicos. Los estudios en mujeres embarazadas muestran datos fiables. Conclusión: La literatura analizada establece la acelerometría <span class="hlt">como</span> un método eficaz para valorar la actividad física.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2000HydJ....8..161S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2000HydJ....8..161S"><span>Stratigraphic and geochemical controls on naturally occurring arsenic in groundwater, eastern Wisconsin, USA</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Schreiber, M. E.; Simo, J. A.; Freiberg, P. G.</p> <p></p> <p> pyrite et dans les sulfates dissous et la corrélation entre les concentrations en sulfates, en fer et en arsenic dissous laissent penser que l'oxydation des sulfures est le processus dominant contrôlant la libération de l'arsenic dans les eaux souterraines. Cependant, les oxy-hydroxydes contenant de l'arsenic sont susceptibles d'être une autre source d'arsenic si des conditions réductrices apparaissent ou s'ils sont transportés dans l'aquifère sous forme de colloïdes. L'analyse des données provenant de puits montre que l'intersection entre le SCH et les niveaux statiques des puits domestiques est fortement corrélée à de fortes concentrations en arsenic dans les eaux souterraines. Des données de terrain et de laboratoire conduisent à penser que la contamination en arsenic la plus forte est causée par l'interaction localisée aux forages entre l'air, l'eau et les sulfures. Bien que la contamination en arsenic soit causée par l'oxydation de sulfures présents naturellement, elle est influencée par les fluctuations du niveau piézométrique causées par les pompages du captage municipal ou par les variations climatiques, ce qui peut conduire au déplacement des zones géographiques où se produisent les contaminations. Resumen Se han medido concentraciones de arsénico muy altas (de hasta 12000μg/L) en las aguas subterráneas de un acuífero confinado, en areniscas, localizado en la parte oriental de Wisconsin (EEUU). La fuente principal de arsénico es un horizonte de cementación secundaria (SCH) con un alto contenido en sulfuros, y con una gran variabilidad en espesor, morfología y concentraciones de As. El arsénico aparece en piritas y marcasitas, además de en oxihidróxidos de <span class="hlt">hierro</span>, pero no <span class="hlt">como</span> una fase independiente de arsenopiritas. El hecho que la marca isotópica de piritas y sulfatos disueltos sea muy similar, y que exista una gran correlación entre las concentraciones de sulfato disuelto, <span class="hlt">hierro</span> y arsénico sugiere que la oxidación de</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/EJ1053828.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/EJ1053828.pdf"><span>Collaborative Work as an Alternative for Writing Research Articles (El trabajo colaborativo <span class="hlt">como</span> alternativa para la escritura de artículos investigativos)</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Carvajal Medina, Nancy Emilce; Roberto Flórez, Eliana Edith</p> <p>2014-01-01</p> <p>Academic writing in English in our context is a significant aspect that can be innovative when a convergence model of writing stages is used along with collaborative work. This article reports on a study aimed at analyzing how collaborative work relates to undergraduate electronics students' academic writing development in English as a foreign…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2012BAAA...55..505L','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2012BAAA...55..505L"><span>Estadísticas de visitas en portales web institucionales <span class="hlt">como</span> indicador de respuesta del público a propuestas de divulgación</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Lares, M.</p> <p></p> <p>The presence of institutions on the internet is nowadays very important to strenghten communication channels, both internal and with the general public. The Córdoba Observatory has several web portals, including the official web page, a blog and presence on several social networks. These are one of the fundamental pillars for outreach activities, and serve as communication channel for events and scientific, academic, and outreach news. They are also a source of information for the staff, as well as data related to the Observatory internal organization and scientific production. Several statistical studies are presented, based on data taken from the visits to the official web pages. I comment on some aspects of the role of web pages as a source of consultation and as a quick response to information needs. FULL TEXT IN SPANISH</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/EJ1051535.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/EJ1051535.pdf"><span>The Accented EFL Teacher: Classroom Implications (El acento del profesor de inglés <span class="hlt">como</span> lengua extranjera: implicaciones pedagógicas)</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Arboleda Arboleda, Argemiro; Castro Garcés, Ángela Yicely</p> <p>2012-01-01</p> <p>This article reports the findings of a research study on how significant having a foreign accent is for non-native English as a foreign language teachers and learners at university level. It points out the perceptions that teachers and students have about the most relevant issues in the teaching and learning processes. Data were collected by means…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/EJ1051580.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/EJ1051580.pdf"><span>The Nature of Recognition in TEFL Teachers' Lives (La naturaleza del reconocimiento en la vida de los maestros de inglés <span class="hlt">como</span> lengua extranjera)</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Scholes Gillingsde González, Barbara</p> <p>2011-01-01</p> <p>This article aims at sharing a vital issue that emerged from the findings of a qualitative research study into collective responses of teachers of English as a foreign language to an extended change process in their Mexican university context from 1989 to 2003. The data generation process employed was comprised of semi-structured interviews as…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED057655.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED057655.pdf"><span>Planeamiento de la unidad didactica en le ensenanza del ingles <span class="hlt">como</span> idioma extranjero (Planning the Teaching Unit in the Instruction of English as a Foreign Language).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Medina T., Rene</p> <p>1971-01-01</p> <p>This paper discusses the use of the teaching unit as a means for organization in English-as-a-foreign-language classes. It lists the essential elements in the construction of such a unit: cultural topic, linguistic elements, time period, main objectives, instructional materials, focus, specific activities, intended results, evaluation techniques,…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED473989.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED473989.pdf"><span>Tips for Parents on Keeping Children Drug Free = Consejos para Los Padres Sobre <span class="hlt">Como</span> Mantener a Los Hijos Libres de La Droga.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Department of Education, Washington, DC. Office of Intergovernmental and Interagency Affairs.</p> <p></p> <p>Research shows that recent trends in youth drug use have stabilized; however, the rates of use remain at high levels. It has been shown that the earlier drug use is initiated, the more likely a person is to develop drug problems later in life. Youth substance abuse may lead to many other problems that affect not only the child, but also the…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/EJ1053728.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/EJ1053728.pdf"><span>Emotions as Learning Enhancers of Foreign Language Learning Motivation (Las emociones <span class="hlt">como</span> potenciadoras de la motivación en el aprendizaje de una lengua extranjera)</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Méndez López, Mariza G.; Peña Aguilar, Argelia</p> <p>2013-01-01</p> <p>The present article reports on a study that explores the effects of the emotional experiences of Mexican language learners on their motivation to learn English. In this qualitative research we present how emotions impact the motivation of university language learners in south Mexico. Results suggest that emotions, both negative and positive,…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=comportamiento&id=EJ049938','ERIC'); return false;" href="https://eric.ed.gov/?q=comportamiento&id=EJ049938"><span>Metodo de Archivar las Observaciones del Comportamiento del Nino, <span class="hlt">Como</span> Guia para Entenderlo Mejor (Methods of Recording Observations of Children's Behavior, A Guide for Better Understanding)</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Stamp, Isla M.</p> <p>1971-01-01</p> <p>Copies of the Behaviour Study Technique described in this article may be obtained in English from the Australian Council for Educational Research, Frederick St., Hawthorn, Victoria, Australia 3122. (RY)</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_18");'>18</a></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li class="active"><span>20</span></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_20 --> <div id="page_21" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li class="active"><span>21</span></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="401"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED436315.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED436315.pdf"><span>Building Your Baby's Brain: A Parent's Guide to the First Five Years = <span class="hlt">Como</span> estimular el cerebro infantil: Una guia para padres de familia.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Dodge, Diane Trister; Heroman, Cate</p> <p></p> <p>Noting that all parents can help their baby's brain to grow, this guide, in English- and Spanish-language versions, explores what science has learned about infant brain development and how parents and caregivers can influence cognitive development. Topics covered include: prenatal care, touching your baby, teaching about feelings and self-control,…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=imagen&id=EJ242503','ERIC'); return false;" href="https://eric.ed.gov/?q=imagen&id=EJ242503"><span>La Imagen Publica y Professional del Espanol en Yanquilandia - y <span class="hlt">Como</span> Mejorarla (The Public and Professional Image of Spanish in "Yankee-Land" and How to Improve It).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Mead, Robert G., Jr.</p> <p>1981-01-01</p> <p>Decries the stereotypes and prejudices that affect U. S. relations with the Hispanic world and with its own Hispanic minorities. Points out that these attitudes also affect the study of Spanish as a foreign language and suggests means by which educators can improve the Hispanic image among Anglo Americans. (MES)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED478013.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED478013.pdf"><span>Interculturalidad y anglofonia en la ensenanza del ingles <span class="hlt">como</span> lengua extranjera (Interculturalism and Anglophone Studies in the Teaching of English as a Foreign Language).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Zoreda, Margaret Lee; Revilla, Teresa Flores</p> <p></p> <p>This article, written in Spanish, proposes to incorporate the subject "Anglophonism" into the curriculum of English as a Foreign Language (EILE) with a view to providing universities with an intercultural division. It provides a brief summary of John Dewey's philosophy with regard to anthropology, politics, and education. It explains the term…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=desarrollo+AND+pensamiento&id=EJ510294','ERIC'); return false;" href="https://eric.ed.gov/?q=desarrollo+AND+pensamiento&id=EJ510294"><span>La efectividad de la educacion a distancia <span class="hlt">como</span> metodologia en la desarrollo de destrezas de pensamiento (Effectiveness of Distance Education as a Methodology for Developing Thinking Skills).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Melendez Alicea, Juan</p> <p>1992-01-01</p> <p>Presents steps taken in designing, justifying, and implementing an experimental study designed to investigate the effectiveness of distance education as a methodology for developing thinking skills. A discussion reviews major findings of the study by comparing student experiences from multimedia distance education and student experiences from…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED401705.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED401705.pdf"><span><span class="hlt">Como</span> Ayudar a Su Hijo a Tener Exito en la Escuela: Guia para Padres Hispanos (Helping Your Child Find Success at School: A Guide for Hispanic Parents).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Hine, Candis Y.</p> <p></p> <p>This pamphlet guides Hispanic parents in helping their children succeed academically, based on findings from a study of 10 high-achieving Puerto Rican high school students. The students described specific family factors which supported and nurtured their academic achievement. Guidelines for parents are extracted from these factors and include: (1)…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED380936.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED380936.pdf"><span><span class="hlt">Como</span> Comunicarse con la Escuela a Traves de la Correspondencia: Guia para Padres (How To Communicate with the School through Letterwriting: A Parent's Guide).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Ferguson, Susan; Ripley, Suzanne</p> <p></p> <p>This guide is intended to help parents understand how a child becomes eligible for special education and related services and how to use letter writing to effectively communicate with the school when necessary. Initial information is presented in question-and-answer format and letters to request services. Sample letters are offered for the parent…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=pobreza&id=EJ525250','ERIC'); return false;" href="http://eric.ed.gov/?q=pobreza&id=EJ525250"><span>Cidadania Negada: A Educacao <span class="hlt">como</span> Instrumento de Combate a Pobreza no Brasil (Denial of Citizenship: Education as a Way to Fight Poverty in Brazil).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Germano, Jose Willington</p> <p>1995-01-01</p> <p>Compares two compensatory social/educational programs developed by the Brazilian government in the last 15 years. States that although one was formulated during the military regime and one during the present government, they both combat poverty and encourage privatization. Concludes that this promotes a process that sees education as social…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=Idiomas&pg=4&id=ED173997','ERIC'); return false;" href="https://eric.ed.gov/?q=Idiomas&pg=4&id=ED173997"><span><span class="hlt">Como</span> evalvar la actuacion del profesor en una clase de segundo idioma (How to Evaluate a Teacher in a Second Language Classroom).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Galvez de Bracamonte, Teresa</p> <p></p> <p>This guide in Spanish provides performance criteria for evaluating the foreign language teacher. It provides an outline for analyzing the teacher's actions and teaching methods in the classroom. Through the evaluation by an outsider, the teacher can learn his or her faults in the views of others and can improve on them. The aspects to be analyzed…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=teoria&id=EJ648071','ERIC'); return false;" href="http://eric.ed.gov/?q=teoria&id=EJ648071"><span>"O Ensaio <span class="hlt">como</span> Forma" ou Um Ensaio acerca da Teoria Critica da Sociedade ("The Essay as Form" or An Essay about the Critical Theory of Society).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Giordano, Rosely</p> <p>2000-01-01</p> <p>Illuminates the critical theory project, with themes permeating the theoretical constructions of Frankfurt (Germany). Debates the predominance of positivism in the production of knowledge. Speculates that "the essay as form" constitutes itself as a representation of the concept of the Enlightenment. Concludes with a dialogue between…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=PREESCOLAR&pg=3&id=ED418804','ERIC'); return false;" href="https://eric.ed.gov/?q=PREESCOLAR&pg=3&id=ED418804"><span>Finding an Appropriate Preschool for Your Child with Special Needs = <span class="hlt">Como</span> Encontrar un Programa Pre-escolar para su nino con desabilidades.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Bernstein, Sandra; Wonderlick, Mary; Madden, Drina</p> <p></p> <p>This booklet, with English and Spanish versions, provides a step-by-step procedure to help families find an appropriate preschool program in the community for their child with disabilities. The booklet lists six steps for locating a program: (1) decide what kind of program is wanted for the child; (2) complete included form outlining child's needs…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=aprender+AND+aprender&id=ED441587','ERIC'); return false;" href="https://eric.ed.gov/?q=aprender+AND+aprender&id=ED441587"><span><span class="hlt">Como</span> los padres ocupados pueden ayudar a sus hijos a aprender y desarrollarse (How Busy Parents Can Help Their Children Learn and Develop). Early Childhood Digest.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Mayer, Ellen; Kreider, Holly; Vaughan, Peggy</p> <p></p> <p>Although parents are often very busy with work and family responsibilities, there are many things they can do to help their school-age children learn and develop. This Spanish-language early childhood digest for parents provides tips obtained from parents of first and second graders in the School Transition Study on creative ways to stay involved…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED420055.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED420055.pdf"><span>El Reto: A Leer America! A Leer Y Escribir Ya! <span class="hlt">Como</span> Divertirse Leyendo Y Escribiendo. (America Reads Challenge: Read*Write*Now! Activities for Reading and Writing Fun)</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Kameenui, Edward J.; Simmons, Deborah C.</p> <p></p> <p>Developed by national reading experts for the "America Reads Challenge: Read*Write*Now!" initiative and translated into Spanish, this booklet provides 45 ideas for families, teachers, librarians, and other learning partners to use with all children--including those with disabilities--to help them read well and independently by the end of…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=Educacion+AND+formal&id=ED207759','ERIC'); return false;" href="https://eric.ed.gov/?q=Educacion+AND+formal&id=ED207759"><span><span class="hlt">Como</span> Puede Mejorar el Programa de Educacion Migrante con el Poder e Influencia de los Padres. Parent Power in the Migrant Education Program: How to Make a Difference.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>National Council of La Raza, Washington, DC.</p> <p></p> <p>The bilingual (English-Spanish) handbook explains the established rights that parents with children enrolled in the Elementary and Secondary Education Act Title I Migrant Education Program have and presents ways in which parents can use these rights to help ensure that their children receive a quality education. Chapters discuss: (1) content of…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED455918.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED455918.pdf"><span>Me escuchas? <span class="hlt">Como</span> conversar con ninos de cuatro a doce anos (Are You Listening to Me? Communicating with Children from Four to Twelve Years Old).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Delfos, Martine F.</p> <p></p> <p>Although talking to children is a daily activity for almost everyone at some stage in one's life and an essential activity for professionals who work with children, there is little research on activity. This Spanish-language book describes communication with children between the ages of 4 and 12 years, focusing on open question-and-answer sessions…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=idiomas&pg=4&id=ED173997','ERIC'); return false;" href="http://eric.ed.gov/?q=idiomas&pg=4&id=ED173997"><span><span class="hlt">Como</span> evalvar la actuacion del profesor en una clase de segundo idioma (How to Evaluate a Teacher in a Second Language Classroom).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Galvez de Bracamonte, Teresa</p> <p></p> <p>This guide in Spanish provides performance criteria for evaluating the foreign language teacher. It provides an outline for analyzing the teacher's actions and teaching methods in the classroom. Through the evaluation by an outsider, the teacher can learn his or her faults in the views of others and can improve on them. The aspects to be analyzed…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4182938','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4182938"><span>Un currículo interdisciplinario de base teórica para enseñar inglés <span class="hlt">como</span> segunda lengua1</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Fuentes, Brenda O.; Mas, Francisco Soto; Mein, Erika; Jacobson, Holly E.</p> <p>2013-01-01</p> <p>Among Hispanic immigrants in the United States (US), learning English is considered necessary for economic and social achievement. As a consequence, there is a high demand for English as a Second Language (ESL) classes. Despite the recognized benefits of ESL programs, both at the individual and social levels, more research is needed to identify education strategies that effectively promote all aspects of learning English as a second language. This article describes an ESL curriculum that incorporates a theory-based pedagogical approach specifically designed for immigrant Hispanic adults on the US-Mexico border region. The article also describes the implementation of the curriculum as well as the results of the evaluation, which was conducted using both quantitative and qualitative methods. Quantitative results indicate that the participants significantly improved their English proficiency (L2). Qualitative results suggest that participants were positively impacted by both the content and pedagogical approaches used by the curriculum. Their experience with the ESL class was positive in general. It can be concluded that the curriculum achieved its objective. This approach could serve as a model for second language teaching for adults. PMID:25284915</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4864188','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4864188"><span>Prevalence of sarcopenia among community‐dwelling elderly of a medium‐sized South American city: results of the <span class="hlt">COMO</span> VAI? study</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Bielemann, Renata M.; Gonzalez, Maria Cristina; Menezes, Ana Maria B.</p> <p>2015-01-01</p> <p>Abstract Background There is insufficient data concerning sarcopenia prevalence in South America. The aim of this study was to estimate sarcopenia prevalence and its clinical subgroups in a Southern Brazilian city. Methods A cross‐sectional population‐based study was performed among community‐dwelling elderly aged 60 years or over. Subjects were evaluated according to the European Working Group on Sarcopenia in Older People established criteria. Muscle mass was estimated by calf circumference (CC). Cut‐off CC points were defined by a subsample's dual X‐ray absorptiometry estimation of the appendicular skeletal muscle mass index (ASMI), which was subsequently compared with the values of a young adult population from the same city. Muscle strength was measured by manual dynamometry. Muscle performance was assessed through the 4 m gait speed test. Results The three diagnostic tests were performed in 1291 subjects. CC of ≤34 cm (males) and ≤33 cm (females) were defined as indicatives of low ASMI. The overall sarcopenia prevalence was 13.9% (CI95% 12.0; 15.8%). Its frequency was significantly higher among elderly with low schooling, without a partner, with low socioeconomic status, smokers, inactive, and with low body mass index. A higher prevalence of pre‐sarcopenia was found in the youngest elderly; a higher prevalence of the clinical stages of the syndrome was found in older age groups. Conclusions Approximately one in ten elderly aged 60–69 years was in the preclinical stage of the disease. This is the age group in which public policies should focus to establish early diagnosis and prevent clinical progression of the syndrome. PMID:27493867</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED416548.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED416548.pdf"><span>"<span class="hlt">Como</span> Se Dice HIV?" Adapting Human Immunodeficiency Virus Prevention Messages to Reach Homosexual and Bisexual Hispanic Men: The Importance of Hispanic Cultural and Health Beliefs.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Bowdy, Matthew A.</p> <p></p> <p>HIV/AIDS prevention messages catered to Anglo homosexual/bisexual men are not effective in teaching preventative behaviors to Hispanic homosexual/bisexual men. Hispanic sociocultural traits associated with homosexuality and bisexuality prevent the effectiveness of these messages. The Hispanic family is also extremely important in influencing…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=Prevalencia+OR+violencia+OR+noviazgo+OR+adolescentes&pg=3&id=ED319516','ERIC'); return false;" href="https://eric.ed.gov/?q=Prevalencia+OR+violencia+OR+noviazgo+OR+adolescentes&pg=3&id=ED319516"><span>How To Talk to Your Teens and Children about AIDS = <span class="hlt">Como</span> hablar con sus adolescentes y sus ninos sobre el SIDA.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>National PTA, Chicago, IL.</p> <p></p> <p>Two brochures, one in English and one in Spanish, provide parents with basic information that will enable them to educate their children about Acquired Immune Deficiency Syndrome (AIDS). Contents address 11 questions: (1) What is AIDS? (2) How do you get AIDS? (3) How is AIDS not spread? (4) Who can get AIDS? (5) How can you tell if someone has…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=comportamiento&id=EJ049938','ERIC'); return false;" href="http://eric.ed.gov/?q=comportamiento&id=EJ049938"><span>Metodo de Archivar las Observaciones del Comportamiento del Nino, <span class="hlt">Como</span> Guia para Entenderlo Mejor (Methods of Recording Observations of Children's Behavior, A Guide for Better Understanding)</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Stamp, Isla M.</p> <p>1971-01-01</p> <p>Copies of the Behaviour Study Technique described in this article may be obtained in English from the Australian Council for Educational Research, Frederick St., Hawthorn, Victoria, Australia 3122. (RY)</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_19");'>19</a></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li class="active"><span>21</span></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_21 --> <div id="page_22" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li class="active"><span>22</span></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li><a href="#" onclick='return showDiv("page_24");'>24</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="421"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED474024.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED474024.pdf"><span>La anglofonia y literaturas poscoloniales en la ensenanza de ingles <span class="hlt">como</span> lengua extranjera (Anglophonism and Postcolonial Literature in Teaching English as a Second Language).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Zoreda, Margaret Lee</p> <p></p> <p>This paper, written in Spanish, focuses on the instruction of English as a Second Language in the context of cultural understanding, rather than from a purely linguistic point of view. It argues that foreign language instruction should include lessons in the field of sociology, anthropology, history, geography, politics, the arts, and popular…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.dtic.mil/docs/citations/ADA258478','DTIC-ST'); return false;" href="http://www.dtic.mil/docs/citations/ADA258478"><span>International Workship on Mathematical Methods in Combustion Held in Villa Olmo, <span class="hlt">Como</span>, Italy on May 18 - 22, 1992. Program and List of Abstracts</span></a></p> <p><a target="_blank" href="http://www.dtic.mil/">DTIC Science & Technology</a></p> <p></p> <p>1992-05-22</p> <p>Olmo, Room " Olimpo " 08.30 Registration 09.15 L. De Luca, R. Reichenbach, V. Calarese Introductory Remarks ANALYTICAL FUNDAMENTALS B.V. Novozhilov...1 sposea• S etIa1 Tuesday, 19 May 1992 Villa Olmo, Room " Olimpo " 8.50 L. De Luca Introductory Remarks NUMERICAL FUNDAMENTALS A. Quarteroni chairman...Trovati: Numerical Simulation in Combustion: Industry Needs and Perspectives 1730 End of Session I Wednesday, 20 May 1992 Villa Olmo, Room " Olimpo " 08.50 L</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=nino+AND+4&pg=5&id=ED319516','ERIC'); return false;" href="http://eric.ed.gov/?q=nino+AND+4&pg=5&id=ED319516"><span>How To Talk to Your Teens and Children about AIDS = <span class="hlt">Como</span> hablar con sus adolescentes y sus ninos sobre el SIDA.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>National PTA, Chicago, IL.</p> <p></p> <p>Two brochures, one in English and one in Spanish, provide parents with basic information that will enable them to educate their children about Acquired Immune Deficiency Syndrome (AIDS). Contents address 11 questions: (1) What is AIDS? (2) How do you get AIDS? (3) How is AIDS not spread? (4) Who can get AIDS? (5) How can you tell if someone has…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED243595.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED243595.pdf"><span>The Why, What, and How of a Bilingual Approach for Young Children [and] El Porque, el Cual y el <span class="hlt">Como</span> de un Enfoque Bilingue para Ninos Preescolares.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Flores, Alfredo R.; Riley, Mary Tom</p> <p></p> <p>This guide, in parallel English and Spanish volumes, provides information necessary for implementing bilingual/multicultural programs. Section 1 defines and describes the bilingual approach, examining instructional goals, rationale, philosophical justification, legal foundations, and practical considerations. Section 2 discusses attitudinal…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED418804.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED418804.pdf"><span>Finding an Appropriate Preschool for Your Child with Special Needs = <span class="hlt">Como</span> Encontrar un Programa Pre-escolar para su nino con desabilidades.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Bernstein, Sandra; Wonderlick, Mary; Madden, Drina</p> <p></p> <p>This booklet, with English and Spanish versions, provides a step-by-step procedure to help families find an appropriate preschool program in the community for their child with disabilities. The booklet lists six steps for locating a program: (1) decide what kind of program is wanted for the child; (2) complete included form outlining child's needs…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2003ASAJ..114R2526S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2003ASAJ..114R2526S"><span>Sound in ecclesiastical spaces in Cordoba. Architectural projects incorporating acoustic methodology (El sonido del espacio eclesial en Cordoba. El proyecto arquitectonico <span class="hlt">como</span> procedimiento acustico)</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Suarez, Rafael</p> <p>2003-11-01</p> <p>This thesis is concerned with the acoustic analysis of ecclesiastical spaces, and the subsequent implementation of acoustic design methodology in architectural renovations. One begins with an adequate architectural design of specific elements (shape, materials, and textures), with the intention of elimination of acoustic deficiencies that are common in such spaces. These are those deficiencies that impair good speech intelligibility and good musical audibility. The investigation is limited to churches in the province of Cordoba and to churches built after the reconquest of Spain (1236) and up until the 18th century. Selected churches are those that have undergone architectural renovations to adapt them to new uses or to make them more suitable for liturgical use. The thesis attempts to summarize the acoustic analyses and the acoustical solutions that have been implemented. The results are presented in a manner that should be useful for the adoption of a model for the functional renovation of ecclesiastical spaces. Such would allow those involved in architectural projects to specify the nature of the sound, even though somewhat intangible, within the ecclesiastical space. Thesis advisors: Jaime Navarro and Juan J. Sendra Copies of this thesis written in Spanish may be obtained by contacting the advisor, Jaime Navarro, E.T.S. de Arquitectura de Sevilla, Dpto. de Construcciones Arquitectonicas I, Av. Reina Mercedes, 2, 41012 Sevilla, Spain. E-mail address: jnavarro@us.es</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED370157.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED370157.pdf"><span>A+chieving Excellence. A Parent's Guide to Site-Based Decision Making. Noteworthy = A+lcanzar la Excelencia. Un manual para padres sobre <span class="hlt">como</span> hacer decisiones. Notable.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Hutchins, C. L.</p> <p></p> <p>The parents' guide in English and Spanish versions, offers a synthesis of the Mid-Continent Regional Educational Laboratory's (McRel) "A+chieving Excellence," a 480-page manual on educational decision-making and management. Four sections examine four broad areas in which policies must be established for improving student achievement--efficiency,…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=ayuda&id=ED449885','ERIC'); return false;" href="https://eric.ed.gov/?q=ayuda&id=ED449885"><span>H.E.L.P.: How To Enjoy Living with a Preadolescent = AYUDA: <span class="hlt">Como</span> Disfrutar de la Vida con un Preadolescente.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Baenen, Judith</p> <p></p> <p>Noting that young adolescents are very much affected by their families, this booklet, in both English- and Spanish-language versions, was prepared for parents/guardians of children ages 10-15 to help them provide the support needed by a child undergoing some of the most dramatic changes in a lifetime. The booklet describes typical behavior of…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED438927.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED438927.pdf"><span>Manejando las burlas: <span class="hlt">Como</span> los padres pueden ayudar a sus hijos (Easing the Teasing: How Parents Can Help Their Children). ERIC Digest.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Freedman, Judy S.</p> <p></p> <p>Children who are teased on a school bus, in class, or during recess often do not want to return to school. Unfortunately, teasing can occur anywhere, and it is difficult to prevent--despite the best efforts of parents, teachers, and school administrators to create a more cooperative atmosphere. This Spanish-language Digest discusses different…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=influencia&id=ED207759','ERIC'); return false;" href="http://eric.ed.gov/?q=influencia&id=ED207759"><span><span class="hlt">Como</span> Puede Mejorar el Programa de Educacion Migrante con el Poder e Influencia de los Padres. Parent Power in the Migrant Education Program: How to Make a Difference.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>National Council of La Raza, Washington, DC.</p> <p></p> <p>The bilingual (English-Spanish) handbook explains the established rights that parents with children enrolled in the Elementary and Secondary Education Act Title I Migrant Education Program have and presents ways in which parents can use these rights to help ensure that their children receive a quality education. Chapters discuss: (1) content of…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=criancas&id=EJ648083','ERIC'); return false;" href="https://eric.ed.gov/?q=criancas&id=EJ648083"><span>O Brincar <span class="hlt">como</span> uma Acao Mediadora no Trabalho Desenvolvido com Criancas Hospitalizadas (Play as a Mediating Activity in Work Developed with Hospitalized Children).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Goulart, Aurea Maria Paes Leme; de Moraes, Silvia Pereira Gonzaga</p> <p>2000-01-01</p> <p>Describes experiences with hospitalized children through the extension project "Writing and Reading at the University Hospital", State University of Maringa Hospital (Brazil). States the initial project proposal provided educational assistance to the children separated from school due to being in the hospital. Used play and games as an…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28197588','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28197588"><span>An unexpected pathway for hydrodesulfurization of gazole over a <span class="hlt">CoMoS</span> active phase supported on a mesoporous TiO2 catalyst.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Naboulsi, I; Felipe Linares Aponte, C; Lebeau, B; Brunet, S; Michelin, L; Bonne, M; Blin, J L</p> <p>2017-02-28</p> <p>Using dual mesoporous titania as a support, due to the presence of intrinsic Brönsted acid sites, the main approach to 4,6-dimethylbenzothiophene (46DMDBT) hydrodesulfurization (HDS) becomes the direct desulfurization (DDS) route through isomerization and dismutation reactions, instead of the hydrogenation (HYD) pathway usually observed with a conventional promoted (by Ni or Co) MoS2/Al2O3 catalyst.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=pensamiento&pg=2&id=EJ510294','ERIC'); return false;" href="http://eric.ed.gov/?q=pensamiento&pg=2&id=EJ510294"><span>La efectividad de la educacion a distancia <span class="hlt">como</span> metodologia en la desarrollo de destrezas de pensamiento (Effectiveness of Distance Education as a Methodology for Developing Thinking Skills).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Melendez Alicea, Juan</p> <p>1992-01-01</p> <p>Presents steps taken in designing, justifying, and implementing an experimental study designed to investigate the effectiveness of distance education as a methodology for developing thinking skills. A discussion reviews major findings of the study by comparing student experiences from multimedia distance education and student experiences from…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.dtic.mil/docs/citations/ADA096058','DTIC-ST'); return false;" href="http://www.dtic.mil/docs/citations/ADA096058"><span>National Dam Safety Program. Lake <span class="hlt">Como</span> Dam (DE 00028), Delaware River Basin, Mill Creek, Kent County, Delaware. Phase I Inspection Report.</span></a></p> <p><a target="_blank" href="http://www.dtic.mil/">DTIC Science & Technology</a></p> <p></p> <p>1980-11-01</p> <p>J J WILLIAMS DACWl1-80- O -0013 uNCLASSIFIED DAEN/NAP-53842/DEOOS2B-BO/ NL LUIIIIIIEEEE IhIIIIIIIIIIIl IIIIIIIIIIIIIu IIIIIIIIIIIIII EIEIIIIIIIII...PHILADELPHIA PA 1q106 15:5 EST IMGMCOMP S.TO REPLY BY MAILGRAM. SEE RFVERSE SIDE FOR WFSTERN UNION S lOLL FI , ADA096 0bb O * BRIEN AND GERE ENGINEERS INC...Lak -e Cowm nlasfe Dam (DE 00028), Del~iturre River Basin, Un. O classifieINdONRIN M4ill Creek, Kent County, Delare 15m SCEDLEIIAIN/ONRD Phase I</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=Mead+AND+G.&pg=4&id=EJ242503','ERIC'); return false;" href="http://eric.ed.gov/?q=Mead+AND+G.&pg=4&id=EJ242503"><span>La Imagen Publica y Professional del Espanol en Yanquilandia - y <span class="hlt">Como</span> Mejorarla (The Public and Professional Image of Spanish in "Yankee-Land" and How to Improve It).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Mead, Robert G., Jr.</p> <p>1981-01-01</p> <p>Decries the stereotypes and prejudices that affect U. S. relations with the Hispanic world and with its own Hispanic minorities. Points out that these attitudes also affect the study of Spanish as a foreign language and suggests means by which educators can improve the Hispanic image among Anglo Americans. (MES)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=espanol&pg=6&id=EJ659446','ERIC'); return false;" href="https://eric.ed.gov/?q=espanol&pg=6&id=EJ659446"><span><span class="hlt">Como</span> sacar el mayor partido a una cancion en la clase de espanol (How to Get the Most Out of a Song in a Spanish Class).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Acuna, Beatriz Gomez</p> <p>2002-01-01</p> <p>Although second language textbooks rarely provide songs or many song-related exercises, music excels at alleviating students' tension, enlivening the atmosphere, and offering teachers opportunities to emphasize pedagogical concepts, whether linguistic or cultural. A series of easy-to-use activities is provided that will work with most songs and is…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=brasil&pg=3&id=EJ525250','ERIC'); return false;" href="https://eric.ed.gov/?q=brasil&pg=3&id=EJ525250"><span>Cidadania Negada: A Educacao <span class="hlt">como</span> Instrumento de Combate a Pobreza no Brasil (Denial of Citizenship: Education as a Way to Fight Poverty in Brazil).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Germano, Jose Willington</p> <p>1995-01-01</p> <p>Compares two compensatory social/educational programs developed by the Brazilian government in the last 15 years. States that although one was formulated during the military regime and one during the present government, they both combat poverty and encourage privatization. Concludes that this promotes a process that sees education as social…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28597233','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28597233"><span>How Have You Been? or ¿<span class="hlt">Como</span> estás?: Does Language of Interview Influences Self-Rated Health Among Hispanic Subgroups?</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Santos-Lozada, Alexis R; Martinez, Matthew J</p> <p>2017-06-08</p> <p>This paper reports language differences in poor/fair self-rated health (SRH) among adults from six Hispanic groups in the United States. Data are from the cross-sectional 1997-2013 National Health Interview Survey (NHIS). The total sample of Hispanic adults with valid information for the variables considered in the study (n = 156,374) included Mexican-Americans (Mex-Am; n = 43,628), Mexicans (n = 55,057), Puerto Ricans (n = 14,631), Cubans (n = 8,041), Dominicans (from Dominican Republican, n = 4,359) and Other Hispanics (n = 30,658). We compared percentage of the population that reported poor/fair SRH among Hispanic individuals by language of interview and across origins using bivariate tests of association. Multivariable logistic regression analysis was used to study the odds of reporting poor/fair SRH based on language among the overall population and each group. Among the six Hispanic origins Puerto Ricans (15.92%), Cubans (16.36%) and Dominicans (15.32%) reported poor/fair SRH at higher levels than the overall sample (12.32%). In the logistic regression model adjusting potential covariates, those interviewed in Spanish were at higher odds of reporting poor/fair SRH than those interviewed in English (OR = 1.47, p < 0.0001). In the stratified analysis, Mexican-Americans were the only group where language of interview did not affect the odds of reporting poor/fair SRH. There are differences by Hispanic origin for reporting poor/fair SRH, and also by language of interview. Achieving accurate measurement of health status among Hispanics is a concern for all researchers, in particular those who study differences in health status by race/ethnicity in the United States. Future, research should account for Hispanic background and language of interviews.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=aprender+AND+aprender&id=ED441587','ERIC'); return false;" href="http://eric.ed.gov/?q=aprender+AND+aprender&id=ED441587"><span><span class="hlt">Como</span> los padres ocupados pueden ayudar a sus hijos a aprender y desarrollarse (How Busy Parents Can Help Their Children Learn and Develop). Early Childhood Digest.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Mayer, Ellen; Kreider, Holly; Vaughan, Peggy</p> <p></p> <p>Although parents are often very busy with work and family responsibilities, there are many things they can do to help their school-age children learn and develop. This Spanish-language early childhood digest for parents provides tips obtained from parents of first and second graders in the School Transition Study on creative ways to stay involved…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/18096210','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/18096210"><span>Opportunities and challenges in ovarian cancer research, a perspective from the 11th Ovarian cancer action/HHMT Forum, Lake <span class="hlt">Como</span>, March 2007.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Ashworth, Alan; Balkwill, Frances; Bast, Robert C; Berek, Jonathan S; Kaye, Allyson; Boyd, Jeffrey A; Mills, Gordon; Weinstein, John N; Woolley, Katie; Workman, Paul</p> <p>2008-03-01</p> <p>Advances in surgery and chemotherapy have improved the 5-year survival for patients with epithelial ovarian cancer, but have not impacted on the ultimate rate of cure in a disease that is diagnosed in late stage and that recurs in the majority of patients. "Omic" technologies promise to define genetically driven aberrant signaling pathways in malignant cells, provided that bioinformatic expertise can be focused on a cancer that is neither common nor rare. Molecular therapeutics must be linked to molecular diagnostics to permit individualized therapy. Not only epithelial cancer cells but also stroma, vasculature and the immune response must be targeted. Closer collaboration between academic institutions, biotech and pharma will be required to facilitate this process and to interest the private sector in an orphan disease. New preclinical models may permit more efficient development of drugs and siRNA that can target dormant drug resistant stem cells. Strategies must be developed to deal with the heterogeneity of different grades and histotypes. Identification of women at increased risk will facilitate prevention and early detection in subsets of patients. BRCA1/2 might be sequenced in all ovarian cancer patients to identify new kindreds. Epidemiologic algorithms are being developed and validated. Awareness must be raised that oral contraceptives can reduce risk of developing ovarian cancer by 50%. Early detection is likely to require panels of complementary biomarkers, analyzed by sophisticated statistical techniques, to improve sensitivity while maintaining extremely high specificity. As ovarian cancer becomes a chronic disease, greater emphasis will be placed on the challenges facing survivors.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_20");'>20</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li class="active"><span>22</span></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li><a href="#" onclick='return showDiv("page_24");'>24</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_22 --> <div id="page_23" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li class="active"><span>23</span></li> <li><a href="#" onclick='return showDiv("page_24");'>24</a></li> <li><a href="#" onclick='return showDiv("page_25");'>25</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="441"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=critical+AND+theory+AND+frankfurt&pg=2&id=EJ648071','ERIC'); return false;" href="https://eric.ed.gov/?q=critical+AND+theory+AND+frankfurt&pg=2&id=EJ648071"><span>"O Ensaio <span class="hlt">como</span> Forma" ou Um Ensaio acerca da Teoria Critica da Sociedade ("The Essay as Form" or An Essay about the Critical Theory of Society).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Giordano, Rosely</p> <p>2000-01-01</p> <p>Illuminates the critical theory project, with themes permeating the theoretical constructions of Frankfurt (Germany). Debates the predominance of positivism in the production of knowledge. Speculates that "the essay as form" constitutes itself as a representation of the concept of the Enlightenment. Concludes with a dialogue between…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=segunda+AND+lengua&id=EJ366198','ERIC'); return false;" href="https://eric.ed.gov/?q=segunda+AND+lengua&id=EJ366198"><span>Creacion de un programa de ensenanza de espanol <span class="hlt">como</span> segunda lengua para ninos de edad prescolar (Creating a Spanish as a Second Language Program for Preschool Children).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Rosenbusch, Marcia H.</p> <p>1987-01-01</p> <p>Presents suggestions for planning a Spanish as a second language program for preschool children. The rationale and means of implementing the program are considered, and guidelines for teaching vocabulary are discussed. A variety of classroom activities are also presented. (TR)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/22754085','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/22754085"><span>Experiencias sobre el impacto del Programa de Formación en Ética de la Investigación Biomédica y Psicosocial en el ámbito de la salud mental y la investigación conductual.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Barrios, Liliana Mondragón</p> <p>2012-01-01</p> <p>El propósito de este trabajo es presentar el impacto y la integración que los conocimientos adquiridos en el Programa Internacional de Formación en Ética de la Investigación Biomédica y Psicosocial de la Universidad de Chile han tenido en mi experiencia profesional, en el ámbito de la investigación psicosocial en un Instituto de Salud de México. Para este objetivo, expondré tres áreas en las cuales se ha podido evidenciar tal impacto: trabajo en los comités de ética, desarrollo de programas de académicos en bioética e investigación y publicación sobre ética y bioética. El motivo que me llevó a incursionar en el Programa fue que su enseñanza vincula la investigación psicosocial con la ética y la bioética, lo cual me permitió dirigir este tipo de reflexión hacia <span class="hlt">problemas</span> <span class="hlt">como</span> violencia, suicidio, adicciones, depresión y salud mental, y a nuevos campos <span class="hlt">como</span> los estudios comunitarios, con poblaciones en riesgo o vulnerables, en los cuales las diversas implicaciones son difíciles de indagar.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/23658034','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/23658034"><span>[Chorea due to TITF1/NKX2-1 mutation: phenotypical description and therapeutic response in a family].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Salvado, Maria; Boronat-Guerrero, Susanna; Hernández-Vara, Jorge; Álvarez-Sabin, José</p> <p>2013-05-16</p> <p>Introduccion. El corea por mutacion en el gen TITF1, tambien denominado corea hereditario benigno, es un trastorno autosomico dominante que suele iniciarse antes de los 5 anos. En la mayoria de casos, el corea tiende a mejorar con la edad. Puede asociar hipotiroidismo y <span class="hlt">problemas</span> respiratorios, <span class="hlt">como</span> el sindrome de distres respiratorio alveolar neonatal o la enfermedad pulmonar intersticial, ya que TITF1 es un factor de transcripcion esencial para el desarrollo del cerebro, tiroides y pulmon. Casos clinicos. Presentamos el fenotipo clinico de una familia con corea, en la cual dos hermanas presentan hipotiroidismo congenito, y una de ellas, sindrome de distres respiratorio alveolar. En ambas se identifico una mutacion en TITF1 (c.825delC) y se observo mejoria clinica en respuesta al tratamiento con levodopa-carbidopa en dosis bajas. Conclusiones. El corea por mutacion de TITF1 es una causa infradiagnosticada de corea en ninos. Debido a la posibilidad de realizar diagnostico genetico, creemos indicado realizarlo siempre en casos familiares dominantes, teniendo en cuenta la penetrancia variable, asi <span class="hlt">como</span> en pacientes que presenten afectacion concomitante de pulmon o hipotiroidismo. En casos esporadicos, puede ser recomendable en coreas de causa no filiada, lo que nos permitira evitar otras pruebas, dar un pronostico no degenerativo, permitir un consejo genetico, y hacer ensayos terapeuticos mas dirigidos y eficaces. Por el momento, la levodopa parece el tratamiento sintomatico de eleccion.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3904861','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3904861"><span>Experiencias y repercusión de una formación en ética de investigación</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Rupaya, Carmen Rosa García</p> <p>2012-01-01</p> <p>El presente artículo tiene <span class="hlt">como</span> propósito describir los logros y repercusiones de la capacitación en ética de la investigación que brinda el Centro Interdisciplinario de Estudios en Bioética de la Universidad de Chile, sirviendo de estímulo, motivación y orientación a profesionales que requieren conocer y aplicar las normas y el raciocinio conducente a la deliberación de los <span class="hlt">problemas</span> en esta disciplina. Asimismo, describe cómo este conocimiento genera un efecto multiplicador en aspectos tales <span class="hlt">como</span> la participación en un comité de ética de la investigación (CEI), organización de cursos y creación y desarrollo de líneas de investigación, que repercuten en publicaciones realizadas con estudiantes de posgrado. Relata además los contenidos y estrategias didácticas que pueden ser empleados en cursos de ética y bioética para estudiantes de estomatología y concluye mencionando la aplicación práctica de esta capacitación en los ámbitos docente, institucional y de investigación. PMID:24482556</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26677776','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26677776"><span>[Structural and functional changes of the hippocampus in patients with multiple sclerosis and their relationship with memory processes].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Cruz-Gómez, Álvaro J; Belenguer-Benavides, Antonio; Martínez-Bronchal, Beatriz; Fittipaldi-Márquez, M Sol; Forn, Cristina</p> <p>2016-01-01</p> <p>Introduccion. Una de las alteraciones cognitivas mas prevalentes en los pacientes con esclerosis multiple son los <span class="hlt">problemas</span> de codificacion de la informacion (tanto verbal <span class="hlt">como</span> visual), proceso relacionado con el hipocampo. Objetivo. Estudiar la relacion entre los procesos de aprendizaje y retencion de la informacion a largo plazo con el volumen hipocampal y la conectividad funcional (CF) en pacientes con esclerosis multiple comparados con un grupo control. Sujetos y metodos. Ambos grupos fueron evaluados con la bateria neuropsicologica breve, que incluye pruebas de memoria verbal y visual. Se realizo el estudio de volumetria de la sustancia gris mediante la tecnica de morfometria basada en el voxel y un estudio de CF de voxel de semilla centrado en la zona de interes (hipocampo). Se realizaron analisis de asociacion entre rendimiento en memoria y cambios volumetricos y de CF. Resultados. Los resultados mostraron atrofia en la sustancia gris en el hipocampo izquierdo y una menor CF entre el hipocampo izquierdo y el troncoencefalo, el cerebelo, el giro fusiforme y el giro temporal superior en los pacientes respecto al grupo control. En el grupo de pacientes se observa una correlacion positiva entre la sustancia gris en ambos hipocampos y el rendimiento en memoria verbal, asi <span class="hlt">como</span> una correlacion positiva entre el rendimiento en memoria visual y la CF entre el hipocampo izquierdo y diversas regiones temporales. Conclusiones. Los resultados muestran una relacion entre el rendimiento de memoria verbal y visual, y cambios estructurales y funcionales en el hipocampo en pacientes con esclerosis multiple.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/24915031','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/24915031"><span>[Refractory status epilepticus presenting as shaken baby syndrome].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Fernandez-Menendez, Andrea; Buenache-Espartosa, Raquel; Coca-Perez, Ana; Morillo-Carnero, Pablo; Martinez-San Millan, Juan; Lorenzo-Sanz, Gustavo</p> <p>2014-06-16</p> <p>Introduccion. El estado convulsivo en el lactante suele ser desencadenado por un sindrome febril secundario a una infeccion intercurrente o una infeccion del sistema nervioso central. El sindrome del bebe zarandeado se caracteriza por la asociacion de hemorragia subdural bilateral o multifocal, hemorragia retiniana y encefalopatia. Los niños menores de 1 año constituyen el grupo de mayor riesgo, con un pico de incidencia maxima entre las 10 y 16 semanas de vida. Los procesos intercurrentes, <span class="hlt">como</span> los colicos del lactante o los sindromes febriles que favorecen el llanto, suelen ser factores precipitantes del zarandeo. Casos clinicos. Presentamos los casos de dos lactantes que en el contexto de un sindrome febril comenzaron con un estado epileptico. En las pruebas de imagen se evidenciaron hematomas subdurales bilaterales en diferente estadio evolutivo y en el fondo de ojo se observaron hemorragias retinianas bilaterales en ambos niños. Conclusiones. En un niño con un proceso febril inespecifico que desarrolla un estado convulsivo se debe pensar, ademas de en los <span class="hlt">problemas</span> mas habituales, en el sindrome del bebe zarandeado <span class="hlt">como</span> posible causa etiologica, sobre todo si es menor de 6 meses.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/24506407','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/24506407"><span>[Prospective study on the effect of the influence of holiday periods in the weight during a low-calory dietetic treatment].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>García, Cándido Gabriel; Berná, Amparo; Sebastià, Natividad; Soriano, José Miguel</p> <p>2013-11-01</p> <p>Introducción: El sobrepeso y la obesidad constituyen, tanto en Europa <span class="hlt">como</span> en España, uno de los mayores <span class="hlt">problemas</span> de Salud Pública puesto que se asocian a factores de riesgo cardiovascular y a la aparición de otras patologías. Según la SEEDO la prevalencia de obesidad en la sociedad española está cerca del 25 %. Además del estudio de nuestro estilo de vida y hábitos incorporados a las costumbres cotidianas, resultaría interesante evaluar cómo influyen en la ganancia de peso total anual los excesos realizados durante muchas festividades, que en muchos casos se suelen prolongar más allá de los días oficialmente festivos. Material y métodos: Estudio prospectivo, de carácter descriptivo a un total de 258 pacientes (95 varones y 163 mujeres) correspondientes a personas con un tratamiento para la reducción del peso corporal, <span class="hlt">como</span> mínimo, de un mes. Se estudiaron siete periodos festivos. Resultados: Considerando todos los pacientes, se observó una correlación lineal significativa (p.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3384683','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3384683"><span>Experiencias sobre el impacto del Programa de Formación en Ética de la Investigación Biomédica y Psicosocial en el ámbito de la salud mental y la investigación conductual</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Barrios, Liliana Mondragón</p> <p>2012-01-01</p> <p>El propósito de este trabajo es presentar el impacto y la integración que los conocimientos adquiridos en el Programa Internacional de Formación en Ética de la Investigación Biomédica y Psicosocial de la Universidad de Chile han tenido en mi experiencia profesional, en el ámbito de la investigación psicosocial en un Instituto de Salud de México. Para este objetivo, expondré tres áreas en las cuales se ha podido evidenciar tal impacto: trabajo en los comités de ética, desarrollo de programas de académicos en bioética e investigación y publicación sobre ética y bioética. El motivo que me llevó a incursionar en el Programa fue que su enseñanza vincula la investigación psicosocial con la ética y la bioética, lo cual me permitió dirigir este tipo de reflexión hacia <span class="hlt">problemas</span> <span class="hlt">como</span> violencia, suicidio, adicciones, depresión y salud mental, y a nuevos campos <span class="hlt">como</span> los estudios comunitarios, con poblaciones en riesgo o vulnerables, en los cuales las diversas implicaciones son difíciles de indagar. PMID:22754085</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27571857','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27571857"><span>[Not Available].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Perales-García, Aránzazu; Estévez-Martínez, Isabel; Urrialde, Rafael</p> <p>2016-07-12</p> <p>Introducción: la hidratación se define <span class="hlt">como</span> el aporte de agua proveniente de alimentos y bebidas. Su estudio constituye desde hace unos años un área en sí misma dentro de la nutrición, que ha supuesto que en 2010 la European Food Safety Authority (EFSA) aprobara las recomendaciones de ingesta de agua; pero el estudio del estado de hidratación implica un elevado nivel metodológico que presenta ciertos desafíos. Objetivo: ofrecer una visión general de los principales <span class="hlt">problemas</span> metodológicos en estudios sobre el estado de hidratación. Material y métodos: revisión de la bibliografía científica existente. Resultados: los principales <span class="hlt">problemas</span> metodológicos presentes son: selección de la muestra (ámbito de investigación y diseño muestral), selección del método de evaluación del estado de hidratación (técnicas de dilución, impedancia bioeléctrica, indicadores plasmáticos y urinarios, cambios en la composición corporal, pérdidas de agua y síntomas clínicos), selección del método de valoración de la ingesta de agua (biomarcadores, cuestionarios, programas informáticos, uso de smartphones, registro 24 h, historia dietética y frecuencia de consumo de alimentos), así <span class="hlt">como</span> sus principales fuentes dietéticas. Conclusiones: el estado de hidratación debe ser entendido <span class="hlt">como</span> un modelo rutinario, de frecuencia diaria y variable en función de la edad, sexo, actividad física y condiciones ambientales; por todo ello es de especial importancia un correcto diseño metodológico capaz de recoger estos matices.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25937559','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25937559"><span>Molecular phylogenetics of Micromeria (Lamiaceae) in the Canary Islands, diversification and inter-island colonization patterns inferred from nuclear genes.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Puppo, Pamela; Curto, Manuel; Gusmão-Guedes, Joana; Cochofel, Jaqueline; Pérez de Paz, Pedro Luis; Bräuchler, Christian; Meimberg, Harald</p> <p>2015-08-01</p> <p>Here we reconstruct the evolutionary history of Micromeria in the Canary Islands using eight nuclear markers. Our results show two centers of diversification for Micromeria, one in the eastern islands Gran Canaria and Lanzarote, the other in the western islands, Tenerife, La Palma and El <span class="hlt">Hierro</span>. Suggested directions of inter-island colonization are the following: Gran Canaria to Lanzarote and La Gomera; Tenerife to La Palma (from the paleoisland of Teno), to El <span class="hlt">Hierro</span> (from the younger, central part), and to La Gomera and Madeira (from the paleoislands). Colonization of La Gomera probably occurred several times from Gran Canaria and Tenerife. The taxonomic implications of these results are discussed. Incongruence among the different markers was evaluated and, using next generation sequencing, we investigated if this incongruence is due to gene duplication. Copyright © 2015 Elsevier Inc. All rights reserved.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/24067336','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/24067336"><span>Depth of origin of magma in eruptions.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Becerril, Laura; Galindo, Ines; Gudmundsson, Agust; Morales, Jose Maria</p> <p>2013-09-26</p> <p>Many volcanic hazard factors--such as the likelihood and duration of an eruption, the eruption style, and the probability of its triggering large landslides or caldera collapses--relate to the depth of the magma source. Yet, the magma source depths are commonly poorly known, even in frequently erupting volcanoes such as Hekla in Iceland and Etna in Italy. Here we show how the length-thickness ratios of feeder dykes can be used to estimate the depth to the source magma chamber. Using this method, accurately measured volcanic fissures/feeder-dykes in El <span class="hlt">Hierro</span> (Canary Islands) indicate a source depth of 11-15 km, which coincides with the main cloud of earthquake foci surrounding the magma chamber associated with the 2011-2012 eruption of El <span class="hlt">Hierro</span>. The method can be used on widely available GPS and InSAR data to calculate the depths to the source magma chambers of active volcanoes worldwide.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3783892','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3783892"><span>Depth of origin of magma in eruptions</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Becerril, Laura; Galindo, Ines; Gudmundsson, Agust; Morales, Jose Maria</p> <p>2013-01-01</p> <p>Many volcanic hazard factors - such as the likelihood and duration of an eruption, the eruption style, and the probability of its triggering large landslides or caldera collapses - relate to the depth of the magma source. Yet, the magma source depths are commonly poorly known, even in frequently erupting volcanoes such as Hekla in Iceland and Etna in Italy. Here we show how the length-thickness ratios of feeder dykes can be used to estimate the depth to the source magma chamber. Using this method, accurately measured volcanic fissures/feeder-dykes in El <span class="hlt">Hierro</span> (Canary Islands) indicate a source depth of 11–15 km, which coincides with the main cloud of earthquake foci surrounding the magma chamber associated with the 2011–2012 eruption of El <span class="hlt">Hierro</span>. The method can be used on widely available GPS and InSAR data to calculate the depths to the source magma chambers of active volcanoes worldwide. PMID:24067336</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/23889641','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/23889641"><span>Metabolic syndrome and nutrition in a Granada's tropical coast population.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Millán, S; Samaniego-Sánchez, C; Romero, A; Quesada-Granados, J J; López-García de la Serrana, H</p> <p>2013-01-01</p> <p>Antecedentes: El síndrome metabólico (SM) es una asociación de <span class="hlt">problemas</span> de salud que pueden aparecer de forma simultánea o secuencial en un mismo individuo, y es importante porque se relaciona con un incremento significativo de riesgo de diabetes, enfermedad coronaria y enfermedad cerebrovascular. La nutrición junto a otros factores <span class="hlt">como</span> es el ejercicio físico y la genetica del individuo, influyen en la prevención del SM. Objetivo: Conocer aspectos importantes <span class="hlt">como</span> el diagnostico, prevalencia y prevención del síndrome metabólico en población de la Costa Tropical Granadina. Métodos: Se estudiaron en 119 individuos de la Costa Granadina parámetros <span class="hlt">como</span> el indice de masa corporal, el porcentaje de grasa corporal, análisis clínicos de glucosa, colesterol total, colesterol HDL, colesterol LDL y estudiaron valores nutricionales mediante encuesta. Resultados: En el estudio se obtuvo una prevalencia el Síndrome metabólico del 20,2%, del que el 58,3% correspondía a mujeres. Los resultados obtenidos reflejan diferencias estadísticas significativas entre los individuos con síndrome metabólico y el grupo control, observándose dichas diferencias en parámetros tales <span class="hlt">como</span> IMC o el porcentaje de grasa corporal. Sin embargo en parámetros <span class="hlt">como</span> porcentaje de lípidos, porcentaje de hidratos de carbono, porcentaje de proteínas y kcal/día no hay diferencias significativas entre los individuos con SM y los individuos control. Conclusión: De esta manera podemos deducir del estudio que la prevalencia de síndrome metabólico en la población de la Costa Tropical Granadina se asemeja a la obtenida en EE.UU y a la obtenida en algunas zonas estudiadas en España. Igualmente, se puede apreciar en este estudio <span class="hlt">como</span> el síndrome metabólico es más frecuente en personas con IMC y % de grasa corporal superior a 30.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.dtic.mil/docs/citations/AD1013937','DTIC-ST'); return false;" href="http://www.dtic.mil/docs/citations/AD1013937"><span>Population Parameters of Blainvilles and Cuviers Beaked Whales</span></a></p> <p><a target="_blank" href="http://www.dtic.mil/">DTIC Science & Technology</a></p> <p></p> <p>2015-09-30</p> <p>deep oceanic waters, they are usually difficult to study. El <span class="hlt">Hierro</span> (Canary Islands) holds resident populations of Blainville’s and Cuvier’s beaked...whales (Mesoplodon densirostris and Ziphius cavirostris) in deep waters close to the shore (Aguilar de Soto 2006, Arranz et al. 2011, 2013). This...individual catalogs available for these species, freely accessible on-line at www.cetabase.info. This web -tool is currently being promoted to construct a</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://ntrs.nasa.gov/search.jsp?R=STS030-73-087&hterms=Hierro&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D60%26Ntt%3DHierro','NASA-TRS'); return false;" href="https://ntrs.nasa.gov/search.jsp?R=STS030-73-087&hterms=Hierro&qs=Ntx%3Dmode%2Bmatchall%26Ntk%3DAll%26N%3D0%26No%3D60%26Ntt%3DHierro"><span>Canary Island Archipelago</span></a></p> <p><a target="_blank" href="http://ntrs.nasa.gov/search.jsp">NASA Technical Reports Server (NTRS)</a></p> <p></p> <p>1989-01-01</p> <p>This nearly vertical view of the Canary Archipelago (28.5N, 16.5W) shows five of the seven islands: Grand Canary, Tenerife, Gomera, <span class="hlt">Hierro</span> and La Palma. The largest island in view is Tenerife. Island cloud wakes evident in this photo are the result of southerly winds giving rise to cloud banks on the lee side especially on Tenerife which has the highest volcanic peaks. Island water wakes and internal waves are also evident but not as apparent.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://www.dtic.mil/docs/citations/ADA578413','DTIC-ST'); return false;" href="http://www.dtic.mil/docs/citations/ADA578413"><span>Population Parameters of Beaked Whales</span></a></p> <p><a target="_blank" href="http://www.dtic.mil/">DTIC Science & Technology</a></p> <p></p> <p>2012-09-30</p> <p>Chronic Ocean Noise: Cetacean Ecology and Acoustic Habitat Loss (European Commission Marie Curie Fellowship) Dec 2010 - Nov 2012 (£190K). Current...students are involved in all facets of the work. RELATED PROJECTS Natacha Aguilar  Sound use in the marine ecosystem (European Commission Marie ... Curie Fellowship) March 2010 - Feb2013 (€297K). Current.  Cetaceans, Oceanography and Biodiversity of Deep Waters in El <span class="hlt">Hierro</span> and La Palma (Canary</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/23808438','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/23808438"><span>Iron availability in an enteral feeding formulation by response surface methodology for mixtures.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Bueno, Luciana</p> <p>2013-01-01</p> <p>Objetivos: La terapia nutricional con nutrición enterales se ha especializado en los últimos 2013s y estas formulaciones pueden sustituir a la dieta tradicional para aquellos pacientes que necesitan de infusiones de alimentación. El objetivo fue estudiar el efecto de los componentes de la formulación de nutrición enterales: fibra, calcio y triglicéridos de cadena media para optimizar una formulación para el <span class="hlt">hierro</span> dialisibilidad. Métodos: La herramienta utilizada fue el análisis de múltiples variables, utilizando modelos de superficie de respuesta para las mezclas. Los ingredientes usados en las formulaciones de la dieta se presentan en el diseño experimental elegido de acuerdo con los módulos que se venden en dieta enteral estándar. Resultados: Los resultados mostraron la dependencia de la respuesta en la proporción de nutrientes que han sido manipulados en las mezclas preparadas en el diseño experimental. En el momento de obtener el contorno de <span class="hlt">hierro</span> dialisible se puede ver que la interacción fibra y calcio era el más sinérgico presentado para la formulación evaluada. Teniendo en cuenta los hechos analizados la mejor formulación de la dieta enteral optimizado para el <span class="hlt">hierro</span> dialisibilidad fue la proporción de 60% de fibra y 40% de calcio.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2013GGG....14.2100H','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2013GGG....14.2100H"><span>Turbidite record of frequency and source of large volume (>100 km3) Canary Island landslides in the last 1.5 Ma: Implications for landslide triggers and geohazards</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Hunt, J. E.; Wynn, R. B.; Talling, P. J.; Masson, D. G.</p> <p>2013-07-01</p> <p>During the last two decades, numerous studies have focused on resolving the landslide histories of the Canary Islands. Issues surrounding the preservation and dating of onshore and proximal submarine landslide deposits precludes accurate determination of event ages. However, submarine landslides often disaggregate and generate sediment gravity flows. Volcaniclastic turbidites sampled from Madeira Abyssal Plain piston cores represent a record of eight large-volume failures from the Western Canary Islands in the last 1.5 Ma. During this time, there is a mean recurrence rate of 200 ka, while the islands of El <span class="hlt">Hierro</span> and Tenerife have individual landslide recurrences of 500 ka and 330 ka, respectively. Deposits from the 15 ka El Golfo landslide from El <span class="hlt">Hierro</span> and 165 ka Icod landslide from Tenerife are examined. This study also identifies potential deposits associated with the Orotava (535 ka), Güímar (850 ka), and Rogues de García landslides (1.2 Ma) from Tenerife, El Julan (540 ka), and El Tiñor (1.05 Ma) landslides from El <span class="hlt">Hierro</span>, and the Cumbre Nueva landslide (485 ka) from La Palma. Seven of eight landslides occurred during major deglaciations or subsequent interglacial periods, which represent 55% of the time. However, all of the studied landslides occur during or at the end of periods of protracted island volcanism, which generally represent 60% of the island histories. Although climate may precondition failures, it is suggested that volcanism presents a more viable preconditioning and trigger mechanism for Canary Island landslides.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28591297','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28591297"><span>Organization of professional practices against intrafamily violence against children and adolescents in the institutional context.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Schek, Gabriele; Silva, Mara Regina Santos da; Lacharité, Carl; Bueno, Maria Emília Nunes</p> <p>2017-06-05</p> <p> atendimento nos serviços e o inter-jogo entre a concepção de violência <span class="hlt">como</span> um <span class="hlt">problema</span> de saúde pública e a de violência <span class="hlt">como</span> um <span class="hlt">problema</span> social. a maneira <span class="hlt">como</span> essas práticas estão organizadas se reflete em ações pouco protetivas frente às situações de violência intrafamiliar contra crianças e adolescentes. analizar, basado en el discurso profesional, <span class="hlt">como</span> ocurre la organización de sus prácticas frente a las situaciones de violencia doméstica intrafamiliar contra niños y adolescentes. investigación cualitativa realizada con 15 profesionales que trabajan en salud y servicios sociales en el sur de Brasil. Los datos fueron recolectados a través de entrevistas semiestructuradas realizadas en el lugar de trabajo de los participantes. Para el análisis de los datos se construyó una matriz teórica basada en la Etnografia Institucional y utilizada la técnica de análisis textual del discurso. las prácticas profesionales desarrolladas en situaciones de violencia intrafamiliar contra los niños y adolescentes se organizan a partir de: las relaciones de poder que tienen lugar en los servicios que responden a las situaciones de violencia; las rutinas puestas en practica para satisfacer las demandas de servicios de atención y el inter-juego entre la concepción de la violencia <span class="hlt">como</span> un <span class="hlt">problema</span> de salud pública y la violencia <span class="hlt">como</span> un <span class="hlt">problema</span> social. la forma en que estas prácticas se organizan se refleja en acciones de poca protección en el enfrentamiento de las situaciones de violencia intrafamiliar contra niños y adolescentes.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li class="active"><span>23</span></li> <li><a href="#" onclick='return showDiv("page_24");'>24</a></li> <li><a href="#" onclick='return showDiv("page_25");'>25</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_23 --> <div id="page_24" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li class="active"><span>24</span></li> <li><a href="#" onclick='return showDiv("page_25");'>25</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="461"> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27571670','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27571670"><span>[Not Available].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Cruz-Sáez, María Soledad; Pascual Jimeno, Aitziber; Wlodarczyk, Anna; Polo-López, Rocío; Echeburúa Odriozola, Enrique</p> <p>2016-07-19</p> <p>Introducción: los <span class="hlt">problemas</span> relacionados con el peso constituyen un <span class="hlt">problema</span> importante de salud pública debido a su alta prevalencia y a las adversas consecuencias que tienen para la salud.Objetivo: el objetivo principal de este estudio fue analizar si la depresión y la ansiedad tienen un papel mediador en la relación entre la insatisfacción corporal y las conductas de control del peso en chicas adolescentes con sobrepeso.Material y métodos: en el estudio participaron 140 mujeres de 16 a 20 años con sobrepeso. Las participantes tuvieron que cumplimentar la escala de insatisfacción corporal del EDI-2, las escalas de ansiedad y depresión del GHQ-28 y una adaptación de las escalas del EAT survey para evaluar las conductas de control del peso. Para los análisis estadísticos se utilizaron métodos de diferencias de medias, correlaciones y de mediación secuencial.Resultados: las adolescentes con sobrepeso y alta insatisfacción corporal presentaban más sintomatología ansiosa y depresiva, así <span class="hlt">como</span> mayor cantidad de conductas de control del peso. Los resultados del análisis de mediación secuencial evidencian que el efecto de la insatisfacción corporal en las conductas de control del peso está parcialmente mediado por las variables depresión y ansiedad. Mientras que la sintomatología ansiosa presenta efectos directos e indirectos sobre las conductas de control de peso, la sintomatología depresiva solamente presenta un efecto indirecto.Conclusiones:los resultados del estudio destacan el rol mediador de la sintomatología depresiva y, especialmente, de la ansiedad en el desarrollo de conductas no saludables de control del peso.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26545507','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26545507"><span>[PREVALENCE OF THINNESS, OVERWEIGHT AND OBESITY AMONG 4-TO-6-YEAR-OLD SPANISH SCHOOLCHILDREN IN 2013; SITUATION IN THE EUROPEAN CONTEXT].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>González García, Alberto; Álvarez Bueno, Celia; Lucas de la Cruz, Lidia; Sánchez López, Mairena; Solera Martínez, Montserrat; Díez Fernández, Ana; Martínez Vizcaíno, Vicente</p> <p>2015-10-01</p> <p>Introducción y objetivos: tanto el exceso de peso <span class="hlt">como</span> la delgadez se relacionan con diversos <span class="hlt">problemas</span> de salud que pueden continuar hasta la edad adulta. Los objetivos de este estudio fueron estimar la prevalencia de delgadez, sobrepeso y obesidad en escolares de 4-6 años de las provincias de Cuenca y Ciudad Real (España), mediante criterios del Grupo Internacional de Trabajo sobre Obesidad y de la Organización Mundial de la Salud, y comparar estas cifras con otros estudios europeos. Métodos: estudio observacional-transversal que incluyó a 1.585 escolares realizado en septiembre de 2013. Las mediciones de peso y talla fueron realizadas por enfermeras entrenadas y mediante procedimientos estandarizados. El estatus ponderal se definió según los criterios del Grupo Internacional de Trabajo sobre Obesidad y la Organización Mundial de la Salud. Resultados: según criterios del Grupo Internacional de Trabajo sobre Obesidad, la prevalencia de delgadez, sobrepeso y obesidad fue del 20,51%, 11,84% y 8,58%, respectivamente; y del 3,97%, 13,92% y 10,79% cuando se utilizaron los criterios de la Organización Mundial de la Salud. No se encontraron diferencias estadísticamente significativas por sexo ni provincia para ninguna categoría de estatus ponderal. Para ambos criterios, la prevalencia de delgadez fue menor a medida que aumentaba la edad, mientras que la prevalencia de sobrepeso/obesidad fue mayor. Conclusiones: la prevalencia de exceso de peso podría haber tocado techo en España, aunque continúa siendo un importante <span class="hlt">problema</span> de salud pública. El aumento de la prevalencia de bajo peso debería ocupar un lugar relevante en las intervenciones de salud pública.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2010PhDT.......232G','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2010PhDT.......232G"><span>Teorí­as de primer y segundo orden sobre el potencial de ciertas figuras de equilibrio de cuerpos celestes</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Gumbau, Manuel Forner</p> <p>2010-11-01</p> <p>Uno de los <span class="hlt">problemas</span> que aborda la Mecánica Celeste es la determinación de las figuras de equilibrio de los cuerpos celestes. Para investigar su solución mediante métodos directos, se precisa evaluar el potencial generado por su autogravitación, el generado por su fuerza centrí­fuga y el generado por la fuerza de atracción entre los cuerpos. Los métodos clásicos de Finlay y Kopal que afrontan estos <span class="hlt">problemas</span>, para determinar el potencial autogravitatorio en las configuraciones de equilibrio, emplean desarrollos en serie de los potenciales interior y exterior del potencial autogravitatorio. Estos métodos incurren en el error de suponer la convergencia en capas donde resulta cuestionable dicha convergencia para estos desarrollos en serie. En este trabajo se han elaborado unos algoritmos que contemplan toda la casuí&stica y que permiten una manipulación efic iente del producto de polinomios de Legendre, del producto de funciones asociada s de Legendre y del producto de armónicos esféricos <span class="hlt">como</span> combinacióon lineal de ellos mismos, respectivamente. Se han obtenido, para primer y segundo orden en las amplitudes, los desarrollos correctos para los potencial es interior y exterior del potencial autogravitatorio para configuraciones de equilibrio aisladas, y , en primer orden de amplitudes, los mismos potenciales para los sistemas binarios próximos. Se ha elaborado un método analítico, en primer orden respecto de las amplitudes, para la determinación del potencial de marea en sistemas binarios próximos en el cual se manifiesta la forma de la componente secundaria del sistema</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=politica+AND+economica&id=ED253384','ERIC'); return false;" href="http://eric.ed.gov/?q=politica+AND+economica&id=ED253384"><span>Los Hispanos: <span class="hlt">Problemas</span> y Oportunidades. Resumen de la Actual Situacion Demografica, Economica, Social y Politica de los Hispanos en los Estados Unidos y de las Iniciativas Tomadas por la Fundacion Ford Para Hacer Frente a las Necesidades de esta Poblacion en Aumento y Determinar sus Efectos Sobre la Sociedad Estadounidense. Documento de Trabajo de la Fundacion Ford, No. 436.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Ford Foundation, New York, NY.</p> <p></p> <p>The Hispanic population's growing impact on American society has caused the Ford Foundation to explore new Foundation initiatives. The 1980 census revealed 14.6 million Hispanics: 60% Mexican American; 14% Puerto Rican; 6% Cuban, and 20% Other. The Hispanic population in the United States is growing and is characterized by diversity; rapid growth…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://eric.ed.gov/?q=juegos&id=EJ1094704','ERIC'); return false;" href="http://eric.ed.gov/?q=juegos&id=EJ1094704"><span>The Problem of "Just Tell Us": Insights from Playing with Poetic Inquiry and Dialogical Self Theory (El <span class="hlt">problema</span> con la actitud de "díganos lo que tenemos que aprender": Comprensiones a partir del juego con indagación poética y la teoría del self dialógico)</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Grimmett, Helen</p> <p>2016-01-01</p> <p>Contemporary approaches to pre-service teacher education and in-service teachers' professional development increasingly reflect the general paradigm swing in education, advocating for dialogic co-construction of understandings of teaching and learning rather than monologic telling of how to be a teacher or how to improve teaching practice.…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://eric.ed.gov/?q=oportunidades&pg=2&id=ED253384','ERIC'); return false;" href="https://eric.ed.gov/?q=oportunidades&pg=2&id=ED253384"><span>Los Hispanos: <span class="hlt">Problemas</span> y Oportunidades. Resumen de la Actual Situacion Demografica, Economica, Social y Politica de los Hispanos en los Estados Unidos y de las Iniciativas Tomadas por la Fundacion Ford Para Hacer Frente a las Necesidades de esta Poblacion en Aumento y Determinar sus Efectos Sobre la Sociedad Estadounidense. Documento de Trabajo de la Fundacion Ford, No. 436.</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Ford Foundation, New York, NY.</p> <p></p> <p>The Hispanic population's growing impact on American society has caused the Ford Foundation to explore new Foundation initiatives. The 1980 census revealed 14.6 million Hispanics: 60% Mexican American; 14% Puerto Rican; 6% Cuban, and 20% Other. The Hispanic population in the United States is growing and is characterized by diversity; rapid growth…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2003BASBr..23..207C','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2003BASBr..23..207C"><span>Transferências orbitais dentro do modelo quase bicircular no sistema Terra-Lua-Sol</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Corrêa, A. A.; de Almeida Prado, A. F. B.; Stuchi, T. J.; Beaugé, C.</p> <p>2003-08-01</p> <p>O <span class="hlt">problema</span> quase bicircular planar consiste na determinação da dinâmica de um corpo, de massa desprezível, que se move sob o campo gravitacional de três corpos. No caso estudado, o quarto corpo é considerado um satélite artificial e os demais são a Terra, a Lua e o Sol, formando o sistema de três corpos. Este modelo permite a construção de uma hamiltoniana similar a do <span class="hlt">problema</span> restrito de três corpos (PRTC), incluindo termos periódicos não autônomos, provenientes da presença do Sol, portanto pode ser entendido <span class="hlt">como</span> uma perturbação ao PRTC. Suas órbitas periódicas aparecem isoladas e possuem o mesmo período solar. Os pontos de equilíbrio colineares possuem o mesmo caráter de estabilidade linear dos pontos lagrangianos (L1, L2 e L3) do PRTC, sendo do tipo sela x centro x centro, instável na direção x e estáveis nas direções y e z. As órbitas periódicas tridimensionais ao redor do ponto colinear é chamada órbita Halo. O objetivo deste trabalho é determinar órbitas de transferências de baixo consumo de combustível para um veículo espacial partindo de uma órbita de estacionamento ao redor da Terra em direção a uma órbita Halo do ponto L1, situado entre a Terra e Lua. Esta tarefa pode ser transformada no <span class="hlt">problema</span> de valor de contorno: dado um ponto inicial na órbita de estacionamento, um ponto final na órbita halo e o tempo de transferência, deseja-se obter a trajetória que liga estes dois pontos e que minimize os incrementos de velocidade do veículo. Essas transferências são realizadas baseadas no método de Lambert e analisadas de modo a fornecer um baixo consumo. Posteriormente, é feita uma comparação de consumo com as órbitas de transferência equivalentes do PRTC.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27571866','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27571866"><span>[Not Available].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Ortega Anta, Rosa M; Jiménez Ortega, Ana Isabel; Perea Sánchez, José Miguel; Cuadrado Soto, Esther; López Sobaler, Ana M</p> <p>2016-07-12</p> <p>Objetivos: la hipertensión arterial es un <span class="hlt">problema</span> sanitario frecuente y con repercusiones sanitarias graves, infradiagnosticado y modulado por los hábitos alimentarios, estilo de vida e ingesta de diversos nutrientes, por lo que analizar los datos más recientes sobre la implicación de la nutrición en la prevención y control de la hipertensión es el objeto de la presente revisión.Métodos: búsqueda bibliográfica en relación con el tema.Resultados: aunque las pautas más conocidas y seguidas son la restricción en la ingesta de sodio, el control de peso y la moderación en el consumo de alcohol, la mejora de la dieta (aumento en el consumo de cereales, verduras, frutas...) y la actividad física parecen tener un gran impacto en el control de las cifras de presión arterial (PA). Asimismo, un menor consumo de grasa saturada (con aumento de ácidos grasos monoinsaturados y omega-3), el aporte adecuado de calcio, magnesio, proteínas, vitamina D y fibra, y la mejora de la capacidad antioxidante de la dieta pueden tener gran importancia en la lucha contra el <span class="hlt">problema</span> de la hipertensión. Teniendo en cuenta que la dieta media española no alcanza los aportes aconsejados para muchos de los nutrientes mencionados <span class="hlt">como</span> favorables en el control de la PA, una aproximación de la dieta al ideal teórico puede ser de gran ayuda en la lucha contra este <span class="hlt">problema</span>, que tiene gran impacto sanitario.Conclusiones: mejorar la alimentación, aumentando el consumo de verduras, legumbres, cereales integrales, pescado… puede tener un mayor beneficio en el control de la presión arterial que el seguimiento de pautas restrictivas más extendidas en la práctica.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28229443','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28229443"><span>[Desvenlafaxine and neuropathic pain: additional clinical benefits of a second generation serotonin-noradrenaline reuptake inhibitor].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Alcantara-Montero, A</p> <p>2017-03-01</p> <p>Introduccion. La desvenlafaxina es el tercer antidepresivo incluido entre los inhibidores de la recaptacion de serotonina y noradrenalina. Las ultimas guias de practica clinica consultadas coinciden en señalar que los antidepresivos triciclicos, los duales (venlafaxina/duloxetina) y los antiepilepticos gabapentina y pregabalina constituyen los farmacos de primera linea en el tratamiento del dolor neuropatico. El tramadol, los apositos de lidocaina al 5% y los parches de capsaicina al 8% son los farmacos de segunda linea, mientras que los opioides potentes constituirian una tercera linea de tratamiento. La interaccion entre el binomio dolor y depresion es muy habitual y representa la complicacion psicologica mas frecuente en los pacientes con dolor cronico. Desarrollo. Tras una busqueda bibliografica, en este articulo se resumen los datos farmacologicos mas relevantes de la desvenlafaxina y su utilidad en la practica clinica, asi <span class="hlt">como</span> la bibliografia especifica de este farmaco en el dolor neuropatico y el dolor cronico. Conclusiones. Aunque la evidencia de la desvenlafaxina en el dolor neuropatico es escasa, presenta unas caracteristicas farmacocineticas interesantes, <span class="hlt">como</span> son no ser sustrato ni actuar sobre la glicoproteina P y tener un metabolismo que practicamente no depende del sistema del citocromo P450, lo que limita el riesgo de interacciones farmacocineticas y los potenciales <span class="hlt">problemas</span> de tolerabilidad asociados cuando se administra con farmacos que sean inhibidores moderados o potentes del CYP2D6 o con otros sustratos de esta isoenzima. Estas caracteristicas hacen de la desvenlafaxina un antidepresivo distinto y especialmente util en algunos subgrupos de pacientes con dolor cronico (<span class="hlt">como</span> polimedicados y pacientes con insuficiencia hepatica), donde la depresion comorbida es frecuente.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27197106','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27197106"><span>[Biofeedback treatment for acute whiplash patients].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Gálvez-Hernández, Carmen Lizette; Rodríguez-Ortiz, María Dolores; Del Río-Portilla, Yolanda</p> <p>2016-01-01</p> <p>Introducción: el objetivo de este trabajo consistió en evaluar el efecto fisiológico y psicológico de la retroalimentación biológica de electromiografía de superficie (RB de EMGs) en combinación con relajación muscular progresiva (RMP) en pacientes con esguince cervical (EC) agudo. Métodos: Un total de 12 pacientes con EC agudo participaron voluntariamente en el estudio, con diseño cuasiexperimental, y grupo control. Criterios de inclusión: máximo dos meses del accidente automovilístico; gravedad I y II. Se excluyeron: pacientes con historia previa de dolor persistente, o que hayan tenido lesión seria. Se dividió en dos grupos aleatoriamente (de intervención y en lista de espera). Se realizó un registro psicofisiológico de los músculos trapecios con EMGs, en conjunto con instrumentos psicométricos: inventario de ansiedad y depresión de Beck; índice de incapacidad de Oswestry; escala visual análoga y de miedo al movimiento. La intervención consistió aplicar RB de EMGs, posterior a un entrenamiento en RMP. Resultados: el grupo de intervención disminuyó significativamente su valor de simetría muscular (permaneciendo dentro de lo normal) así <span class="hlt">como</span> su percepción subjetiva del dolor, intragrupo antes/después de la intervención. Conclusiones: se produjo un cambio significativo (tanto clínico <span class="hlt">como</span> estadístico) en la percepción del dolor y la actividad conjunta de músculos pares. Igualmente, muestra la relevancia de atender un <span class="hlt">problema</span> agudo multidisciplinariamente; así <span class="hlt">como</span> la utilidad de las estrategias psicofisiológicas clínicas en pacientes agudos de EC.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/24528356','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/24528356"><span>Prolonged flaxseed flour intake decreased the thickness of the aorta and modulates some modifiable risk factors related to cardiovascular disease in rats.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Cardozo, Ludmila Ferreira Medeiros de França; Vicente, Gabriela Câmara; Brant, Lívia Hipólito Cardozo; Mafra, Denise; Chagas, Maurício Alves; Boaventura, Gilson Teles</p> <p>2014-02-01</p> <p>Las enfermedades cardiovasculares son un <span class="hlt">problema</span> de salud pública. Diferentes factores de riesgo han sido reconocidos <span class="hlt">como</span> las principales causas del desarrollo y la progresión de las enfermedades cardiovasculares. La linaza es una fuente de fibra dietética, lignanos, y el ácido alfa-linolénico. El objetivo de este estudio fue evaluar los efectos de la suplementación prolongada con harina de linaza <span class="hlt">como</span> tratamiento preventivo de los parámetros de riesgo cardiovascular en ratas Wistar saludables. Material y métodos: Ratas hembras Wistar fueron divididas en dos grupos después de dar a luz y durante el perío do de lactancia: el grupo de control fue alimentado con una dieta basada en caseína y el grupo de la linaza se alimentó con una dieta basada en caseína que contiene 25% de harina de linaza. Al destete, 10 ratas macho de la camada de cada grupo siguió recibiendo las mismas dietas de sus madres durante 250 días. El peso corporal, la masa grasa visceral, colesterol, triglicéridos, HDL, VLDL, la glucosa y el grosor de la aorta fueron analizado. Resultados: El peso corporal, la masa grasa visceral, colesterol, triglicéridos, HDL, VLDL, la glucosa y el grosor de la aorta esos valores fueron estadísticamente menor en comparación con el grupo control. Conclusión: Los datos sugieren que la suplementación con harina de linaza en ratas Wistar saludables durante un período prolongado puede disminuir el espesor de la aorta y puede ser utilizado <span class="hlt">como</span> una medida preventiva en la modulación de algunos factores de riesgo modificables relacionados con la enfermedad cardiovascular.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26156441','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26156441"><span>[Drooling therapy in children with neurological disorders].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Táboas-Pereira, M Andrea; Paredes-Mercado, Cecilia; Alonso-Curcó, Xènia; Badosa-Pagès, Joaquim; Muchart, Jordi; Póo, Pilar</p> <p>2015-07-16</p> <p>Introduccion. La sialorrea es la incapacidad para retener la saliva dentro de la boca y su progresion al tracto digestivo, y es un <span class="hlt">problema</span> frecuente en pacientes pediatricos con patologia neurologica, por lo que se estan utilizando diferentes medidas para su tratamiento. Objetivo. Evaluar la eficacia y seguridad del trihexifenidilo, la escopolamina y la infiltracion de toxina botulinica en el tratamiento del babeo en niños con patologia neurologica. Pacientes y metodos. Es un estudio de tipo abierto y prospectivo. Incluye pacientes atendidos en el servicio de neurologia que presentaban babeo excesivo, con repercusion en su calidad de vida, entre 2009 y 2013. Resultados. En 46 pacientes se indico tratamiento con trihexifenidilo oral, y se obtuvo buena respuesta en 15 (32,6%), tres con efecto transitorio y el resto mantenido. Presentaron efectos secundarios tres pacientes (6,5%). De los 11 pacientes a los que se indicaron parches de escopolamina, se hallo efecto beneficioso en cuatro (36,36%), uno fue retirado por falta de eficacia y seis por efectos secundarios. Veinticinco pacientes fueron infiltrados con toxina botulinica, con disminucion significativa del babeo en 16 (64%) tras la primera infiltracion. No observamos cambios significativos en nueve casos. Solo uno presento efectos secundarios (disfagia leve). Conclusiones. Por no haber una opcion terapeutica totalmente eficaz para los pacientes con sialorrea, recomendamos iniciar el tratamiento con trihexifenidilo; <span class="hlt">como</span> segunda opcion, los parches de escopolamina, y <span class="hlt">como</span> tercera opcion, la toxina botulinica. La infiltracion de toxina botulinica en glandulas salivales se muestra <span class="hlt">como</span> una alternativa eficaz y segura segun nuestra serie.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26268127','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26268127"><span>ASSOCIATION OF HELICOBACTER PYLORI INFECTION WITH NUTRITIONAL STATUS AND FOOD INTAKE.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Rocha, Daianne Cristina; Sampaio, Helena Alves de Carvalho; de Oliveira Lima, José Wellington; Carioca, Antônio Augusto Ferreira; Posso Lima, Gláucia; Ribeiro de Oliveira, Ticihana; Araújo Chagas Vergara, Clarice Maria; Sousa Nunes Pinheiro, Diana Célia; Lima Herculano Júnior, José Ruver; de Pontes Ellery, Thais Helena</p> <p>2015-08-01</p> <p>Introducción: la infección por H. pylori afecta a más de la mitad de la humanidad, siendo un <span class="hlt">problema</span> de salud pública. Su prevalencia es significativamente mayor en los países en desarrollo, <span class="hlt">como</span> Brasil. Se ha sugerido que la infección por H. pylori puede influir en la ingesta y la homeostasis calórica. Propósito: comparar el estado nutricional y la ingesta de alimentos de los pacientes incluidos en el Sistema Nacional de Salud, con y sin infección por H. pylori. Métodos: se evaluarón 140 pacientes. Realizaron la endoscopia digestiva alta para investigar la presencia de H. pylori. Se midieron el peso corporal y la altura de los pacientes. La ingesta de alimentos se investigó a través de dos recordatorios de 24 horas, con los dados transformados en gramos y analizados en el software DietWin Professional 2.0. Los resultados se compararon mediante la prueba de chi-cuadrado o la prueba t de Student. Se adoptó de p < 0,05 <span class="hlt">como</span> nivel de significación. Resultados: hubo predominio de pacientes con exceso de peso tanto para Hp - (60,3%) <span class="hlt">como</span> Hp + (67,7%), sin diferencias entre ellos. La ingesta de alimentos de los grupos evaluados fue similar. Conclusiones: no hubo diferencias en el estado nutricional y la ingesta de alimentos entre los dos grupos.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27238779','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27238779"><span>[In Process Citation].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Blázquez, Ferrán Padrós; Navarro Contreras, Gabriela; Garcidueñas Gallegos, Diana; Fulgencio Juárez, Mónica</p> <p>2016-03-25</p> <p>Introducción: la obesidad es una enfermedad asociada a diferentes trastornos físicos y emocionales que inciden en la calidad de vida y que representan un <span class="hlt">problema</span> de elevada prevalencia en el mundo. La etiología es múltiple y compleja; se ha señalado la culpa <span class="hlt">como</span> consecuencia del sobrepeso y, al mismo tiempo, <span class="hlt">como</span> factor asociado al aumento de peso. En México no existen instrumentos para evaluar la culpa por obesidad y sobrepeso en niños y adolescentes. Objetivos: analizar la fiabilidad y validez de la Escala de Culpa por Obesidad o Sobrepeso para Niños y Adolescentes (ECOSNA) en población de Morelia (México). Material y métodos: se elaboró una versión preliminar basada en la bibliografía que se sometió a la revisión de jueces expertos. La escala obtenida de 6 ítems se aplicó a una muestra de 1.418 estudiantes de educación básica de 7 a 15 años. Se realizó un análisis factorial confir- matorio y se estudió la relación de la escala con otras variables <span class="hlt">como</span> autoestima, sintomatología depresiva y ansiedad. Resultados: la escala resultó unifactorial, se obtuvo un índice alfa de Cronbach de 0,853. La escala ECOSNA mostró una correlación moderada e inversa con la escala de autoestima, y directa y baja con la sintomatología depresiva y la ansiedad clínica. Conclusión: los datos empíricos indican que la escala presenta una validez y confiabilidad satisfactorias.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28591299','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28591299"><span>Anxiety and coping in women with breast cancer in chemotherapy.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Silva, Araceli Vicente da; Zandonade, Eliana; Amorim, Maria Helena Costa</p> <p>2017-06-05</p> <p> com o enfrentamento com foco no <span class="hlt">problema</span> (p=0,001) e com o foco na emoção (p=0,004). Os resultados demonstram fracas associações entre as diferentes estratégias de enfrentamento. a estratégia de enfrentamento eleita pelas mulheres com câncer de mama tem relação direta com a ansiedade. As pacientes que possuem ansiedade com nível baixo tendem a utilizar <span class="hlt">como</span> estratégia a resolução dos <span class="hlt">problemas</span> e quando o nível é médio a alto o enfrentamento com foco na emoção. identificar las estrategias de enfrentamiento utilizadas por las mujeres con cáncer de mama sometidas a quimioterapia y la asociación con el perfil de la ansiedad que presentan. estudio transversal de tipo analítico. Utilizamos muestra aleatoria de 307 mujeres con cáncer con quimioterapia previa, adyuvante o paliativa. Se recogieron los datos con entrevistas registradas en un formulario y búsqueda activa en los registros médicos, Escala de Modo de Enfrentamiento de <span class="hlt">Problemas</span> e Inventario de Ansiedad y Estado. Se utilizó para análisis el Paquete Estadístico para Ciencias Sociales 19.0, coeficiente de correlación Pearson y la prueba de Mann-Whitney. hubo una asociación significativa del rasgo ansiedad y las estrategias de enfrentamiento centradas en el <span class="hlt">problema</span> y en la emoción (p<0,000) y el estado de ansiedad con el enfrentamiento centrado en el <span class="hlt">problema</span> (p=0,001) y con el foco en emoción (p=0,004). Los resultados muestran asociaciones débiles entre diferentes estrategias de enfrentamiento. la estrategia de enfrentamiento elegida por las mujeres con cáncer de mama está directamente relacionada con la ansiedad. Las pacientes que tienen ansiedad con niveles bajos tienden a utilizar una estrategia de solución de <span class="hlt">problemas</span> y cuando el nivel es medio a alto utilizan el enfrentamiento centrado en la emoción.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://files.eric.ed.gov/fulltext/ED465239.pdf','ERIC'); return false;" href="http://files.eric.ed.gov/fulltext/ED465239.pdf"><span>Communicacion Expresiva: <span class="hlt">Como</span> los ninos nos envian mensajes [and] Comunicacion Receptiva: <span class="hlt">Como</span> los ninos entienden nuestros mensajes [and] Interacciones de Comunicacion: Hacen falta dos. Hojas informativa de DB-LINK (Communication Interactions: It Takes Two [and] Receptive Communication: How Children Understand Your Messages to Them [and] Expressive Communication: How Children Send Their Messages to You. DB-LINK Fact Sheets).</span></a></p> <p><a target="_blank" href="http://www.eric.ed.gov/ERICWebPortal/search/extended.jsp?_pageLabel=advanced">ERIC Educational Resources Information Center</a></p> <p>Stremel, Kathleen</p> <p></p> <p>This document consists of three separately published fact sheets combined here because of the close relationship of their subject matter. The first fact sheet, "Communication Interactions: It Takes Two" (Kathleen Stremel), defines communication; suggests ways to find opportunities for interactive communication; offers specific suggestions for…</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5047372','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=5047372"><span>Relaciones entre el sueño y la adicción</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Cañellas, Francesca; de Lecea, Luis</p> <p>2016-01-01</p> <p>Resumen La interacción entre los trastornos del sueño y el abuso de sustancias es ya conocida, pero seguramente más compleja de lo que se pensaba. Existe tanto una relación positiva entre tener un trastorno por uso de substancias y sufrir un trastorno de sueño, <span class="hlt">como</span> viceversa. Los efectos sobre el sueño dependen de la substancia utilizada, pero se ha demostrado que tanto durante su uso <span class="hlt">como</span> en período de abstinencia los consumidores tienen diferentes <span class="hlt">problemas</span> de sueño y fundamentalmente un sueño más fragmentado. Sabemos que hay que tener en cuenta los <span class="hlt">problemas</span> de sueño para evitar recaídas en la adicción. Investigaciones recientes indican que el sistema hipocretinérgico definido por el neuropéptido hipocretina/orexina (Hcrt/ox), localizado en el hipotálamo lateral e implicado entre otros en la regulación del ciclo sueño-vigilia, jugaría un papel importante en las conductas adictivas. Diferentes estudios han demostrado interacciones entre el sistema hipocretinérgico, los circuitos de respuesta aguda al estrés y los sistemas de recompensa. También sabemos que la activación optogenética selectiva del sistema hipocretinérgico incrementa la probabilidad de la transición del sueño a la vigilia, y también es suficiente para iniciar un comportamiento compulsivo de recaída adictiva. La activación del sistema hipocretinérgico podría explicar la hipervigilia asociada al estrés y a la adicción. El mayor conocimiento de esta interacción permitiría entender mejor los mecanismos de la adicción y encontrar nuevas estrategias para el tratamiento de las adicciones. PMID:23241715</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2011SNEA....1...34V','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2011SNEA....1...34V"><span>Análise dos Conceitos Astronômicos Apresentados por Professores de Algumas Escolas Estaduais Brasileiras</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Voelzke, Marcos Rincon; Gonzaga, Edson Pereira</p> <p>2011-12-01</p> <p>A razão para o desenvolvimento deste trabalho baseia-se no fato de que muitos professores da Educação Básica (EB) não lidam com conceitos relacionados à astronomia, e quando o fazem eles simplesmente seguem livros didáticos que podem conter erros conceituais. <span class="hlt">Como</span> é de conhecimento geral a astronomia é um dos conteúdos a serem ensinados na EB fazendo parte dos Parâmetros Curriculares Nacionais e das Propostas Curriculares do Estado de São Paulo, mas é um fato, que vários pesquisadores apontam, a existência de muitos <span class="hlt">problemas</span> no ensino da astronomia. Com o propósito de minimizar algumas dessas deficiências foi realizado um trabalho de pesquisa com a utilização de questionários pré e pós pesquisa, para tanto foi desenvolvido um Curso de Extensão Universitária para professores da Diretoria de Ensino Regional (DE) que abrange Mauá, Ribeirão Pires e Rio Grande da Serra (no Estado de São Paulo) com os seguintes objetivos: levantar concepções alternativas; subsidiar os professores por meio de palestras, debates e workshops, e verificar o sucesso da aprendizagem após o curso, adotando-se <span class="hlt">como</span> referência, para a análise dos resultados, os dicionários de Língua Portuguesa (FERREIRA, 2004) e Enciclopédico de Astronomia e Astronáutica (MOURĀO, 1995). Portanto, dezesseis questões foram aplicadas antes e após o curso, assim pode-se verificar após a pesquisa que 100,0% dos professores sabiam os nomes das fases da Lua, 97,0% entenderam que o Sistema Solar é composto por oito planetas, 78,1% foram capazes de explicar <span class="hlt">como</span> ocorre um eclipse lunar, um eclipse solar e um solstício, 72,7% sabiam <span class="hlt">como</span> explicar a ocorrência das estações do ano; 64,5% explicaram corretamente a ocorrência do equinócio, 89,7% foram capazes de definir adequadamente o termo cometa; 63,6% definiram asteróide, 54,5% meteoro, 58,1% galáxia, e 42,4% planeta. Os resultados obtidos indicam uma aprendizagem significativa por parte dos participantes.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2003BASBr..23...66S','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2003BASBr..23...66S"><span>Estudo de soluções locais e cosmológicas em teorias do tipo tensor-escalar</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Silva E Costa, S.</p> <p>2003-08-01</p> <p>Teorias do tipo tensor-escalar são a mais simples extensão possí vel da Relatividade Geral. Nessas teorias, cujo modelo padrão é a teoria de Brans-Dicke, a curvatura do espaço-tempo, descrita por componentes tensoriais, aparece acoplada a um campo escalar que, de certo modo, representa uma variação na constante de acoplamento da gravitação. Tais teorias apresentam soluções locais e cosmológicas que, em determinados limites, recaem nas apresentadas pela Relatividade Geral, mas que em outros limites trazem novidades, tais <span class="hlt">como</span> conseqüências observacionais da evolução de flutuações primordiais distintas daquelas previstas pela Relatividade Geral (ver, por ex., Nagata et al., PRD 66, p. 103510 (2002)). Graças a esta possibilidade de trazer à luz novidades em relação à gravitação, teorias do tipo tensor-escalar podem ser vistas <span class="hlt">como</span> um interessante campo alternativo de pesquisas para soluções dos <span class="hlt">problemas</span> de massa faltante (ou escura) e/ou energia escura. Seguindo tal linha, este trabalho, ainda em sua fase inicial, apresenta soluções gerais de teorias do tipo tensor-escalar para diversas situações, verificando-se em que consiste a divergência dessas soluções dos casos tradicionais possí veis na Relatividade Geral. <span class="hlt">Como</span> exemplos das soluções aqui apresentadas pode-se destacar uma expressão geral para diferentes soluções cosmológicas englobando diferentes tipos de matéria (representados por diferentes equações de estado), e a expressão para uma solução local representando um buraco negro com rotação, similar à solução de Kerr da Relatividade Geral. Por fim, é importante ressaltar que, embora aqui apresentem-se poucos resultados novos, na literatura sobre o assunto a maior parte das soluções apresentadas limita-se a uns poucos casos especí ficos, tal <span class="hlt">como</span> soluções cosmológicas apenas com curvatura nula, e que mesmo as soluções disponí veis são, em geral, pouco divulgadas e, portanto, pouco conhecidas, e </p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2003BASBr..23..136V','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2003BASBr..23..136V"><span>Melhoramentos no código Wilson-Devinney para binárias eclipsantes</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Vieira, L. A.; Vaz, L. P. R.</p> <p>2003-08-01</p> <p>A análise de curvas de luz e velocidades radiais de sistemas binários eclipsantes pode ser feita por meio de vários modelos. Um desses é o Modelo Wilson-Devinney (WD). Ao longo dos anos, esse modelo sofreu várias alterações em seus códigos principais, com a finalidade de torná-lo mais consistente tanto fíisica <span class="hlt">como</span> numericamente. O Modelo WD tem sido melhorado de várias maneiras em seus dois códigos: um para a predição das curvas de luz teórica e de velocidade radiais e outra para as soluções destas curvas. Teoricamente, na física do modelo, nós introduzimos a possibilidade de levar em conta os efeitos do movimento apsidal. Numericamente, nós introduzimos a possibilidade de usar o Método SIMPLEX no procedimento da solução, <span class="hlt">como</span> uma alternativa para o já implementado Método de Mínimos Quadrados (Least Squares Method). Estas modificações, juntamente com outras já introduzidas pelo nosso grupo anteriormente, tornam o código mais eficiente na solução das curvas de luz e de velocidade radiais de binárias eclipsantes. <span class="hlt">Como</span> o modelo tem sido usado para analisar sistemas com componentes pré-sequência principal (TY CrA, Casey et al. 1998, Vaz et al. 1998), SM 790, Stassun et al. 2003), este melhoramento beneficiará estes casos também. Apresentamos os resultados obtidos com a modificação do código WD por meio do uso de dados da estrela GL Carinae, comprovando, (1) que os parâmetros orbitais calculados por nós são coerentes com os obtidos anteriormente na literatura (Giménez & Clausen, 1986) e com os obtidos por Faria (1987), e (2) que a implementação do Método SIMPLEX torna o código mais lento mas completamente consistente internamente e evita os <span class="hlt">problemas</span> gerados pelo uso do Método de Mínimos Quadrados, tais <span class="hlt">como</span> imprecisão no cálculo das derivadas parciais e convergência para mínimos locais.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li class="active"><span>24</span></li> <li><a href="#" onclick='return showDiv("page_25");'>25</a></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_24 --> <div id="page_25" class="hiddenDiv"> <div class="row"> <div class="col-sm-12"> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li><a href="#" onclick='return showDiv("page_24");'>24</a></li> <li class="active"><span>25</span></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div> </div> <div class="row"> <div class="col-sm-12"> <ol class="result-class" start="481"> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/1999BAAA...43...57L','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/1999BAAA...43...57L"><span>Variación temporal de las constantes fundamentales</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Landau, S. J.; Vucetich, H.</p> <p></p> <p>La variación temporal de las constantes fundamentales es un <span class="hlt">problema</span> que ha motivado numerosos trabajos teóricos y experimentales desde la hipótesis de los grandes números de Dirac en 1937. Entre los métodos experimentales y observacionales para establecer restricciones sobre la variación de las constantes fundamentes es importante mencionar: comparación entre relojes atómicos[1], métodos geofísicos[2][3], análisis de sistemas de absorción en quasares[4][5][6] y cotas provenientes de la nucleosíntesis primordial[7]. En un trabajo reciente[5], se reportó una significativa variación en la constante de estructura fina. Intentos de unificar las cuatro interacciones fundamentales dieron <span class="hlt">como</span> resultado teorías con múltiples dimensiones <span class="hlt">como</span> las teorías de Kaluza-Klein y teorías de supercuerdas. Estas teorías proporcionan un marco teórico natural para el estudio de la variación temporal de las constantes fundamentales. A su vez, un modelo sencillo para estudiar la variación de la constante de estructura fina, fue propuesto en [8], a partir de premisas muy generales <span class="hlt">como</span> ser covarianza, invarianza de gauge, causalidad y invarianza ante reversiones temporales en el electromagnetismo. Diferentes versiones de las teorías antes mencionadas coinciden en predecir variaciones temporales de las constantes fundamentales pero difieren en la forma de esta variación[9][10]. De esta manera, las restricciones establecidas experimentalmente sobre la variación de las constantes fundamentales pueden ser una herramienta importante para testear estas diferentes teorías. En este trabajo, utilizamos las cotas provenientes de diversas técnicas experimentales, para testear si las mismas son consistentes con alguna de las teorías antes mencionadas. En particular, establecemos cotas sobre la variación de los parámentros libres de las diferentes teorías <span class="hlt">como</span> por ejemplo el radio de las dimensiones extras en las teorías tipo Kaluza-Klein.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2003BASBr..23R.118L','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2003BASBr..23R.118L"><span>Abundância química de simbióticas na direção do bojo galáctico</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Luna, G. J. M.; Costa, R. D. D.</p> <p>2003-08-01</p> <p>O estudo da distribuição de metalicidades de gigantes K no Bojo indica um largo intervalo com valores entre 0.1 a 10 vezes o valor solar. As razões elementais Ca/Fe, Si/Fe, Mg/Fe são típicas de estrelas do halo, apontando para um processo rápido de enriquecimento, via estrelas masssivas (SN's tipo II). No entanto, este cenário não combina com os resultados derivados de nebulosas planetárias do bojo tais <span class="hlt">como</span> os de Ratag et al. (1992, A&A,255,270), Cuisinier et al.(2000, A&A,353, 543), Escudero e Costa (2001, A&A,380, 300),que obtêm abundâncias análogas às do disco. Neste cenário, o estudo de estrelas simbióticas possibilita uma abordagem particularmente apropriada para o <span class="hlt">problema</span> das abundâncias químicas de estrelas de massa intermediária em estágios avançados da evoluçao estelar. Apresentamos aqui os resultados da determinacão das abundâncias do grupo do CNO numa extensa amostra de simbióticas do bojo. Aliás, com a disponibilidade de espectros no visível determinamos também abundâncias de Ar, Ne, S e He, fundamentais para analisar os processos de enriquecimento químico ocorridos ao longo da evolução estelar, bem <span class="hlt">como</span> a evolução química do meio interestelar. Com os espectros UV do satelite IUE obtivemos abundâncias de C, necessárias no estudo da evolução dos sistemas. As relaçoes C/N-O/N mostram que o material nebular é produto do vento da componente gigante e não dos eventos de nova que às vezes acontecem nestes sistemas, <span class="hlt">como</span> foi mostrado por Nussbaumer et al (1988,A&A,198,179). As abundâncias de Ar, S, Ne e O são compativeis com resultados de fontes no disco e bojo, seguindo o gradiente proposto por muitos autores na literatura a partir de diferentes objetos <span class="hlt">como</span> cefeidas, nebulosas planetárias e anãs G. (CAPES,FAPESP,CNPq)</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2006RELEA...3...19P','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2006RELEA...3...19P"><span>Reviving Erathostenes. (Breton Title: Revivendo Eratóstenes.) Reviviendo a Eratóstenes.</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Pereira, Paulo Cesar R.</p> <p>2006-12-01</p> <p> <span class="hlt">problemas</span>. <span class="hlt">Como</span> parte de las conmemoraciones del Año Internacional de la Física y con el objetivo principal de introducir a los estudiantes secundarios al método científico, la Fundación Planetario Rio de Janeiro, en conjunto con diversas instituciones de Brasil y de Europa, coordinó la actividad denominada "Reviviendo a Eratóstenes" cuyo objetivo consistió en la determinación de la cincunferencia de la Tierra. Para esto se utilizó un procedimiento semejante al empleado por Eratóstenes hace más de 2.000 años, con algunas adaptaciones. Este trabajo expone y analiza el método empleado, con la intención de aplicarlo en las escuelas. La posibilidad de trabajar en lugares situados en diferentes meridianos permite una mejor comprensión de los conceptos más abstractos, tales <span class="hlt">como</span> coordenadas y husos horarios. La precisión de los resultados resultó razonable, mejorando para aquellas ciudades mas apartadas. Finalmente, una de las conclusiones más importantes es la de la percepción, por parte de los estudiantes, de la importancia de la colaboración (en este caso internacional) para resolver <span class="hlt">problemas</span>.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/28092242','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/28092242"><span>[Prehospital emergency care injuries from external causes in a region of Venezuela].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Herrera, Rafael; Bastidas, Daniel; Arteaga, Everilda; Bastidas, Gilberto</p> <p>2017-01-01</p> <p>Introducción: a nivel mundial, anualmente mueren aproximadamente 3 500 000 personas <span class="hlt">como</span> consecuencia de lesiones debidas a causas externas, lo que representa para Venezuela la tercera causa de morbilidad general. Sin embargo, no existen registros en el país de los aspectos que definen la atención de emergencia prehospitalaria <span class="hlt">como</span> herramienta para afrontar este <span class="hlt">problema</span> socio-sanitario, objeto de la presente investigación. Métodos: estudio descriptivo, transversal y de campo con base en la información registrada diariamente durante un año en emergencia prehospitalaria. Resultados: fueron en total 1493 los lesionados por causas externas, con edad promedio de 29.5 ± 12 años, 84.5% del género masculino. Las lesiones fueron, en su mayoría, de severidad menor-moderada (69.4%), debidas a accidentes de transporte terrestre (70.9%), ocurridos de día (75.9%), entre lunes y viernes (72.9%), atendidos en 20 minutos o menos, y trasladados en el 97.3% de los casos. Conclusiones: los hombres jóvenes, económicamente productivos, de las zonas con mayor densidad poblacional y urbanismos son los más afectados por lesiones por causas externas; en ambos géneros, los accidentes de transporte terrestre son las causas más frecuente de lesión, de severidad menor-moderada; asimismo, la atención de emergencia prehospitalaria puede considerarse adecuada.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25252667','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25252667"><span>[Pharmacological management of attention deficit hyperactivity disorder with methylphenidate and atomoxetine within a context of epilepsy].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Mulas, Fernando; Roca, Patricia; Ros-Cervera, Gonzalo; Gandía-Benetó, Rubén; Ortiz-Sánchez, Pedro</p> <p>2014-02-24</p> <p>Introduccion. La prevalencia del trastorno por deficit de atencion/hiperactividad (TDAH) en pacientes con epilepsia se situa en torno al 30-40%, especialmente del subtipo inatento, mientras que, a su vez, distintos estudios sobre niños diagnosticados de TDAH muestran cifras variables del 6,1-30% que presentan alteraciones en el electroencefalograma y <span class="hlt">problemas</span> de epilepsia. Aunque las guias de practica clinica no desaconsejan el tratamiento con psicoestimulantes en el TDAH comorbido con epilepsia, en especial si esta no se considera activa, algunos investigadores y clinicos recomiendan ser cautos en el inicio de esta terapia farmacologica, mientras que el uso de no psicoestimulantes esta menos estudiado. Objetivo. Revisar las historias clinicas de niños con epilepsia y TDAH que recibieron tratamiento farmacologico con psicoestimulantes y no psicoestimulantes para el trastorno de atencion. Pacientes y metodos. Muestra de 23 pacientes de 5-16 años. Se analizo el tipo de epilepsia y la evolucion clinica y electroencefalografica al año y a los dos años tras el inicio del tratamiento farmacologico del TDAH. Resultados. A los dos años, un paciente presento una crisis y dos pacientes continuaban mostrando actividad paroxistica en el electroencefalograma. Conclusion. Los datos presentados muestran que el tratamiento farmacologico del TDAH no empeora la epilepsia en pacientes bien controlados, aunque se recomienda tener en cuenta factores <span class="hlt">como</span> el tipo de farmaco antiepileptico, el tipo de farmaco para el TDAH, asi <span class="hlt">como</span> el perfil cognitivo, para favorecer un desarrollo adecuado. En los niños epilepticos con dificultades del aprendizaje, deben valorarse los mecanismos de los procesos atencionales que puedan estar alterados y que precisen un tratamiento especifico.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25795934','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25795934"><span>[Bariatric surgery in adults: variables that facilitate and hinder weight loss from pacients perspective].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Lecaros-Bravo, Javiera; Cruzat-Mandich, Claudia; Díaz-Castrillón, Fernanda; Moore-Infante, Catalina</p> <p>2015-04-01</p> <p>Introducción: La obesidad se ha convertido en un <span class="hlt">problema</span> de salud pública a nivel mundial. Asociado a esto, las cirugías bariátricas han ido en progresivo aumento, dada su efectividad en la baja de peso a corto plazo. Sin embargo, se ha visto que existe un alto porcentaje de reganancia de peso a partir del tercer año post cirugía y existen pocos estudios de seguimiento de estos pacientes. Objetivos: Describir los facilitadores y obstaculizadores de la pérdida de peso, desde la perspectiva de adultos que han sido sometidos a cirugía bariátrica. Métodos: Se utilizó un enfoque cualitativo, descriptivo, basado en la Teoría Fundamentada. Se realizaron entrevistas en profundidad y los datos se analizaron a través de codificación abierta. La muestra estuvo compuesta por 8 mujeres y 3 hombres adultos, intervenidos en clínicas privadas. Resultados: Se generaron cinco categorías de análisis: (1) variables que favorecen la pérdida de peso post cirugía bariátrica, (2) variables que dificultan la pérdida y mantención de peso post cirugía, (3) evaluación de los resultados de la cirugía bariátrica, (4) problematización de la obesidad, y (5) relación con la comida. Discusión: Los principales hallazgos indican que el fracaso y el éxito en la pérdida de peso post cirugía se encuentra asociado a la posibilidad de tener una red de apoyo emocional y social, así <span class="hlt">como</span> a la posibilidad de comprender y modificar el rol de la comida <span class="hlt">como</span> mecanismo de regulación emocional.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/25617579','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/25617579"><span>[Prevalence of malnutrition in a mid-long term stay unit].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Argente Pla, María; García Malpartida, Katherine; León De Zayas, Beatriz; Martín Sanchis, Silvia; Micó García, Andrea; Del Olmo García, Maria Isabel; Moral Moral, Pedro; Moreno Muñoz, Iván; Beseler Soto, Rosario; Ramos Prol, Agustín; Merino Torres, Juan Francisco</p> <p>2014-10-06</p> <p>Introducción: La desnutrición es un <span class="hlt">problema</span> de salud frecuente, especialmente en el ámbito hospitalario donde se asocia con estancias más prolongadas y mayor tasa de morbi-mortalidad. Por otro lado, los avances científicos actuales y la mayor expectativa de vida, han producido un aumento progresivo de unidades de media y larga estancia (UMLE). Objetivos: Determinar la prevalencia de desnutrición en una UMLE mediante el uso del MNA y la VGS, así <span class="hlt">como</span> analizar los factores/características clínicas asociadas a la misma y sus repercusiones. Métodos: Estudio transversal, descriptivo de una cohorte formada por 201 pacientes ingresados en la UMLE de un Hospital universitario de forma consecutiva durante 12 meses. Se recogieron variables clínicas, antropométricas, bioquímicas e historia nutricional, así <span class="hlt">como</span> escala de comorbilidad de Charlson, escala cognitiva de Pfeiffer, escala funcional de Barthel y presencia de edemas, ascitis y úlceras por presión. El estado nutricional fue evaluado en las primeras 24-72 horas de ingreso mediante el MNA y la VGS. La presencia de disfagia se evaluó mediante el cuestionario EAT-10 y el MECV-V. Resultados: La prevalencia global de desnutrición fue del 76,6%, siendo la desnutrición mixta grave la más prevalente (20.4%). Los pacientes desnutridos tenían más edad (p=0,002), mayor grado de dependencia (p.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4286892','PMC'); return false;" href="https://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4286892"><span>Estrategia innovadora enfocada en parejas del mismo sexo para disminuir la infección del VIH en hombres Latinos</span></a></p> <p><a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pmc">PubMed Central</a></p> <p>Martinez, Omar; Wu, Elwin; Sandfort, Theo; Shultz, Andrew Z.; Capote, Jonathan; Chávez, Silvia; Moya, Eva; Dodge, Brian; Morales, Gabriel; Porras, Antonio; Ovejero, Hugo</p> <p>2014-01-01</p> <p>Resumen El VIH es un <span class="hlt">problema</span> de salud importante dentro de la comunidad latina de los Estados Unidos. Gracias a los esfuerzos de prevención, los niveles de contagio entre los latinos se han mantenido estables por más de una década. Sin embargo, esta población sigue siendo afectada a niveles muy altos, en particular entre hombres que tienen sexo con hombres (HSH), de origen latino y que hablan principalmente el idioma español. Existen varios factores que contribuyen a la transmisión del VIH entre esta población, <span class="hlt">como</span> son: el uso de drogas; la violencia dentro de la pareja; la presencia de infecciones de transmisión sexual; relaciones sexuales sin protección, dentro y fuera de la pareja; el evadir la búsqueda de recursos (prueba y tratamiento adecuado) por temor a ser discriminado o por su estatus migratorio; la escasez de recursos económicos o estado de pobreza y los patrones relacionados a la migración. En particular, Investigaciones Epidemiológicas de Comportamientos han determinado: cómo algunas dinámicas en parejas están directamente asociadas a los comportamientos sexuales de riesgos. En consecuencia, es necesaria mayor investigación para identificar esas dinámicas, y a su vez, realizar intervenciones dirigidas a la reducción de conductas de riesgo enfocadas en parejas de hombres del mismo sexo. En este escrito, se describe la importancia del uso de las relaciones de pareja <span class="hlt">como</span> estrategia en la reducción de la trasmisión del VIH/SIDA en HSH de origen latino y que hablan principalmente el idioma español en los Estados Unidos. PMID:25580466</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2003BASBr..23...33P','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2003BASBr..23...33P"><span>OV-Wav: um novo pacote para análise multiescalar em astronomia</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Pereira, D. N. E.; Rabaça, C. R.</p> <p>2003-08-01</p> <p>Wavelets e outras formas de análise multiescalar têm sido amplamente empregadas em diversas áreas do conhecimento, sendo reconhecidamente superiores a técnicas mais tradicionais, <span class="hlt">como</span> as análises de Fourier e de Gabor, em certas aplicações. Embora a teoria dos wavelets tenha começado a ser elaborada há quase trinta anos, seu impacto no estudo de imagens astronômicas tem sido pequeno até bem recentemente. Apresentamos um conjunto de programas desenvolvidos ao longo dos últimos três anos no Observatório do Valongo/UFRJ que possibilitam aplicar essa poderosa ferramenta a <span class="hlt">problemas</span> comuns em astronomia, <span class="hlt">como</span> a remoção de ruído, a detecção hierárquica de fontes e a modelagem de objetos com perfis de brilho arbitrários em condições não ideais. Este pacote, desenvolvido para execução em plataforma IDL, teve sua primeira versão concluída recentemente e está sendo disponibilizado à comunidade científica de forma aberta. Mostramos também resultados de testes controlados ao quais submetemos os programas, com a sua aplicação a imagens artificiais, com resultados satisfatórios. Algumas aplicações astrofísicas foram estudadas com o uso do pacote, em caráter experimental, incluindo a análise da componente de luz difusa em grupos compactos de galáxias de Hickson e o estudo de subestruturas de nebulosas planetárias no espaço multiescalar.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2003cnam.conf...84B','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2003cnam.conf...84B"><span>Estudio de la fotoabsorción y fotoionización de la molécula de alta relevancia atmosférica no a través de los estados Rydberg con la metodología MQDO</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Bustos, E.; Velasco, A. M.; Martín, I.; Lavín, C.</p> <p></p> <p>Los procesos de fotoionización son de una importancia fundamental [1] y encuentran aplicación en un gran número de contextos científicos: Astrofísica [2], química de las radiaciones, biología. Los investigadores de dichos campos, necesitan de valores de fiables de secciones eficaces para la fotoionización parcial, la Fotoabsorción, así <span class="hlt">como</span> para los procesos de fotofragmentación en amplios intervalos espectrales, particularmente en estudios de modelización [3-5]. En este trabajo se ha centrado la atención sobre el oxido nítrico, que se ha considerado apropiado y relevante por varios motivos: por el trascendental papel que representa en la física y química de la alta atmosfera [6], aparte de por estar íntimamente relacionado con los <span class="hlt">problemas</span> de contaminación. Los procesos de recombinación disociativa [7] del NO, donde los estados Rydberg se encuentran directamente implicados, son relevantes, por ejemplo, en las regiones E y F de la ionosfera [7]. En este trabajo se estudia la fotoionización del NO desde el estado fundamental con la versión molecular del método del orbital de defecto cuántico (MQDO). Para ello se calcula el diferencial de las fuerzas de oscilador parciales que constituyen los canales de fotoionización del NO desde el estado fundamental. La continuidad del diferencial de fuerza de oscilador calculada a través del umbral de fotoionización, esto es, en las regiones del espectro discreta y del continua, se adopta <span class="hlt">como</span> criterio de calidad la escasez de datos comparativos [8].</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27149186','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27149186"><span>[Effectiveness of a ketogenic diet in children with refractory epilepsy: a systematic review].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Araya-Quintanilla, F; Celis-Rosati, A; Rodriguez-Leiva, C; Silva-Navarro, C; Silva-Pinto, Y; Toro-Jeria, B</p> <p>2016-05-16</p> <p>Introduccion. La epilepsia es una patologia cerebral que afecta tanto a niños <span class="hlt">como</span> a adultos. Desde los años veinte, la dieta cetogenica ha ganado prestigio <span class="hlt">como</span> otra opcion de tratamiento en pacientes con epilepsia refractaria. Sujetos y metodos. Se realiza una sintesis de la evidencia a traves de una revision sistematica de ensayos clinicos aleatorizados que hayan comparado una dieta cetogenica sola con otros tipos de dieta para el tratamiento de estos pacientes. Objetivo. Determinar la efectividad de la dieta cetogenica en la disminucion de los episodios de convulsiones en pacientes con epilepsia refractaria. La estrategia de busqueda incluyo ensayos clinicos aleatorizados y ensayos clinicos controlados. Las bases de datos usadas fueron: Medline, LILACS, Central y CINAHL. Resultados. Se obtuvieron seis articulos que cumplian con los criterios de elegibilidad. Conclusiones. Existe evidencia limitada de que la dieta cetogenica en comparacion con la dieta de trigliceridos de cadena media es mas efectiva en disminuir la frecuencia de las convulsiones. Existe evidencia moderada de que la dieta cetogenica clasica en comparacion con la dieta gradual (2,5:1 y 3:1) es mas efectiva para disminuir las crisis epilepticas. Existe evidencia moderada de que la dieta cetogenica clasica en comparacion con la dieta Atkins es mas efectiva para disminuir la frecuencia de convulsiones en tres meses. La decision de aplicar este tipo de dietas tambien debe basarse en costes, preferencias y seguridad del tratamiento. Ademas, debe considerarse la probabilidad de que algunos estudios, por <span class="hlt">problemas</span> de indizacion, hayan quedado fuera de la revision.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/23897146','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/23897146"><span>[Autism and attention deficit hyperactivity disorder: similarities and differences in executive functioning and theory of mind].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Miranda-Casas, Ana; Baixauli-Fortea, Immaculada; Colomer-Diago, Carla; Roselló-Miranda, Belén</p> <p>2013-09-06</p> <p>Introduccion. Aunque los criterios diagnosticos del autismo y del trastorno por deficit de atencion/hiperactividad (TDAH) en el DSM-IV-TR no se solapan, la presencia de sintomas de TDAH en individuos con un diagnostico clinico de autismo es muy elevada. A su vez, los niños con TDAH pueden tener rasgos autistas, aunque los mas prevalentes son las dificultades sociales y de comunicacion. El analisis del perfil en las funciones ejecutivas y en la teoria de la mente (ToM) podria ayudar a explicar el solapamiento y la diferenciacion entre ambos trastornos. Objetivo. Revisar los hallazgos de estudios empiricos en los que se ha comparado a niños con TDAH y con autismo en indicadores de funcionamiento ejecutivo y ToM. Desarrollo. La revision de las investigaciones sugiere la existencia de patrones distintos en el trastorno del espectro autista (TEA) y en el TDAH cuando el funcionamiento ejecutivo se segmenta en componentes. Los niños con TDAH experimentan deficit en el control inhibitorio mientras que los niños con TEA tienen mas <span class="hlt">problemas</span> en flexibilidad cognitiva y en planificacion. En cuanto al dominio de las habilidades mentales se producen diferencias evolutivas, asi <span class="hlt">como</span> en su gravedad. Los niños mas pequeños con TEA experimentan mayores deficiencias en la ToM en comparacion con los niños con TDAH y un deficit primario en la orientacion social. Conclusiones. Aunque los avances son importantes, quedan asuntos pendientes por aclarar, entre los que destaca el analisis de <span class="hlt">como</span> afecta un pobre desarrollo de las funciones ejecutivas al desarrollo de la ToM, con estudios longitudinales que analicen las trayectorias evolutivas de niños con TEA y niños con TDAH.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27238791','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27238791"><span>[In Process Citation].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Jiménez-León, Alejandra Soledad; Pérez-Escobar, Iván; Matías-Pérez, Diana; García-Montalvo, Iván Antonio</p> <p>2016-03-25</p> <p>Introducción: los grupos de ayuda mutua se forman con la finalidad de atender a adultos mayores con <span class="hlt">problemas</span> crónicos-degenerativos. La organización y participación activa de los integrantes favorece la intervención del nutriólogo y, por ende, cambios en el estilo de vida de los participantes, sobrellevando de mejor manera sus vidas. Objetivo: intervenir nutricionalmente en individuos del Grupo de Ayuda Mutua del Centro de Salud C-2, "El Rosario" de Oaxaca de Juárez, México. Material y métodos: se trató de un estudio observacional, descriptivo, analítico y longitudinal, llevado a cabo desde noviembre/2014 hasta julio/2015, evaluando el estado nutricional antes y después de la intervención, buscando la correlación entre índice de masa corporal (IMC), glucosa capilar, hemoglobina glicada con las consultas-talleres brindadas. Resultados: la muestra trabajada fue de 15 participantes del Grupo de Ayuda Mutua con un promedio de edad de 55,26 años, con un IMC de 28,74 kg/cm 2 , glucosa capilar de 218,66 mg/dl y una hemoglobina glicada de 10,43%. Al finalizar la intervención se correlacionaron entre sí mediante Spearman, dando <span class="hlt">como</span> resultado el valor de 1, es decir, una correlación positiva perfecta. Conclusión: el nutriólogo juega hoy en día un papel importante en el hecho de atender enfermedades crónico-degenerativas, a través del seguimiento en consultas y talleres propuestos. Los grupos de ayuda mutua día a día se posicionan <span class="hlt">como</span> una estrategia en la línea educativa para mejorar el control de las enfermedades.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2003BASBr..23...35M','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2003BASBr..23...35M"><span>Sobre o uso das séries de Puiseux em mecanica celeste</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Miloni, O. I.</p> <p>2003-08-01</p> <p>Neste trabalho é apresentada uma demonstração do uso dos diferentes desenvolvimentos em séries para as equações de perturbação em Mecânica Celeste no marco Hamiltoniano. Em trabalhos clássicos <span class="hlt">como</span> os de Poincaré (Poincaré, 1893) por exemplo, já esta planteado o uso de potências não inteiras no pequeno parâmetro, o que evidencia a não analiticidade das funções quando uma ressonância ocorre. Nestes trabalhos os desenvolvimentos são na raíz quadrada da massa de Júpiter (o pequeno parâmetro). Mais recentemente (Ferraz-Mello, 1985) outros tipos de desenvolvimentos foram aplicados modificando substancialmente as ordens de grandeza e a velocidade de convergência das séries. Com esta abordagem, os desenvolvimentos foram expressados em termos da raíz cúbica do pequeno parâmetro. Neste trabalho apresentamos um enfoque geral, onde os diferentes tipos de desenvolvimentos em séries de Puiseux (Valiron, 1950) são obtidos a partir da aplicação de Teorema de Preparação de Weierstrass (Goursat, 1916) considerando a equação de Hamilton-Jacobi <span class="hlt">como</span> uma equação algébrica. Os resultados são aplicados ao <span class="hlt">problema</span> restrito dos três corpos em ressonância de primeira ordem e, dependendo da grandeza da excentricidade do asteróide em relação à de Júpiter, obtemos os diferentes desenvolvimentos, em raíz quadrada ou raíz cúbica da massa de Júpiter.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/26461127','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/26461127"><span>[Evolution of functional capacity, assessed with the Egen Klassifikation scale, in the Spanish population with spinal muscular atrophy or Duchenne muscular dystrophy. A three year longitudinal study].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Fagoaga, J; Girabent-Farres, M; Bagur-Calafat, C; Steffensen, B F</p> <p>2015-10-16</p> <p>Introduccion. La atrofia muscular espinal (AME) y la distrofia muscular de Duchenne (DMD) son dos enfermedades neuromusculares que evolucionan con perdida progresiva de la fuerza muscular y, en consecuencia, perdida de la capacidad funcional. La valoracion con escalas de medicion permite conocer mejor y cuantificar esta involucion, asi <span class="hlt">como</span> tomar decisiones terapeuticas para anticiparse a los <span class="hlt">problemas</span> y mejorar la calidad de vida de las personas afectas de estas patologias. Objetivo. Estudiar los cambios de la capacidad funcional de un grupo de pacientes con AME y DMD en un periodo de tres años. Pacientes y metodos. Diecinueve personas de la poblacion española afectas de AME o DMD, a las que se valoro con la escala Egen Klassifikation en dos ocasiones, en un periodo de tres años. Resultados. Los resultados obtenidos reflejan una disminucion de la capacidad funcional de estas personas durante este periodo de tiempo, con una diferencia significativa en la suma total de la escala (p = 0,003). Todos los items de la escala tuvieron valoraciones inferiores despues de tres años, y se llego a la significacion estadistica en la valoracion de la capacidad de mover las manos y de toser. Conclusion. La capacidad funcional de los pacientes con AME y DMD disminuye de forma significativa en tres años.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27569568','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27569568"><span>[A proposal for a model to replace carbamazepine or oxcarbazepine by eslicarbazepine acetate in clinical practice].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Poza-Aldea, J J</p> <p>2016-09-01</p> <p>Introduccion. Durante muchos a˜os, la carbamacepina (CBZ) ha sido el farmaco de referencia para el tratamiento de las crisis epilepticas parciales. Sin embargo, los <span class="hlt">problemas</span> asociados de su farmacocinetica y tolerabilidad han llevado al desarrollo de otros derivados, <span class="hlt">como</span> la oxcarbacepina (OXC) y, mas recientemente, el acetato de eslicarbacepina (ESL), que obvien estos inconvenientes. Desarrollo. En la practica clinica, se presenta con relativa frecuencia la posibilidad de sustituir la CBZ o la OXC por ESL, buscando mantener la eficacia de los predecesores y ganar las ventajas en el ambito de farmacocinetica y tolerabilidad que ofrece este ultimo derivado. Para ello es indispensable disponer de una equivalencia aproximada de dosis y un protocolo de intercambio. La presente revision ofrece un modelo practico y razonado para realizar el cambio. Conclusiones. El paso de OXC a ESL se puede realizar de un dia para otro con una equivalencia de dosis de 1-1,5 a 1. La sustitucion de CBZ por ESL debe ser mas progresiva, y la equivalencia de dosis se establece en 1-1,3 a 1.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2002BAAA...45...78C','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2002BAAA...45...78C"><span>Órbitas caóticas en satelites galácticos</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Carpintero, D. D.; Muzzio, J. C.; Vergne, M. M.; Wachlin, F. C.</p> <p></p> <p>En trabajos anteriores investigamos las órbitas de estrellas que forman los satelites galácticos utilizando análisis de frecuencias. Su uso estaba plenamente justificado por su velocidad y la gran información que brinda, amén de haber dado resultados muy concordantes con los exponentes de Liapunov. Sin embargo, más recientemente, encontramos algunos <span class="hlt">problemas</span> en la utilización del análisis de frecuencias en sistemas de referencia rotantes (<span class="hlt">como</span> se utilizan para los satélites), por lo que en este trabajo rehicimos nuestras investigaciones previas utilizando exclusivamente exponentes de Liapunov. Algunas conclusiones anteriores se han confirmado, en tanto que otras deben modificarse. Además, los nuevos resultados muestran que las escalas de tiempo de los procesos caóticos en los satélites galácticos son comparables a, o más cortas que, las escalas de tiempo de otros procesos dinámicos característicos de estos objetos.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/24144141','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/24144141"><span>[Analysis of maternal deaths in Mexico occurred during 2009].</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Fajardo-Dolci, Germán; Meljem-Moctezuma, José; Vicente-González, Esther; Venegas-Páez, Francisco Vicente; Villalba-Espinoza, Ignacio; Pérez-Cardoso, Ana Luisa; Barrón-Saldaña, Dante Adrián; Montesinos-Gómez, Gabriela; Aguirre Güemez, Ana Valeria; Novoa-Boldo, Alejandro; Mendoza-Larios, Laura Alejandra; López-González, Rosa; Mazón-González, Betania; Aguirre-Gas, Héctor Gerardo</p> <p>2013-01-01</p> <p>Introducción: en 2011 ocurrieron 955 defunciones maternas en México, 49.9 por 100 000 nacidos vivos. La meta de la Organización Mundial de la Salud para 2015 es reducir la tasa a 22.5: 560 defunciones anuales. Métodos: estudio descriptivo y retrospectivo de 1257 muertes maternas ocurridas en México durante 2009, con una muestra representativa de 173 expedientes. Se calcularon frecuencias simples y porcentajes. Resultados: las muertes maternas ocurrieron por causas directas <span class="hlt">como</span> preeclampsia-eclampsia, infección y hemorragia obstétrica secundaria a atonía uterina, acretismo placentario y placenta previa. Quince mujeres tuvieron complicaciones por abortos. Cuatro murieron por embarazo extrauterino debido a diagnóstico y tratamiento tardíos. Las causas indirectas de la muerte materna fueron neoplasias, sepsis abdominal, eventos vasculares, <span class="hlt">problemas</span> metabólicos y cardiopatías. Veinticinco pacientes fallecieron por neumonía atípica y 11 por influenza A H1N1. Conclusiones: es factible disminuir la mortalidad materna mediante suficientes consultas prenatales de calidad y evitar embarazos con riesgo alto por los antecedentes obstétricos y los padecimientos asociados. La influenza A H1N1 interrumpió la tendencia descendente de la mortalidad materna.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('https://www.ncbi.nlm.nih.gov/pubmed/27606662','PUBMED'); return false;" href="https://www.ncbi.nlm.nih.gov/pubmed/27606662"><span>Campylobacter jejuni: A rare agent in a child with peritoneal dialysis-related peritonitis.</span></a></p> <p><a target="_blank" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed">PubMed</a></p> <p>Tural Kara, Tugce; Yilmaz, Songul; Ozdemir, Halil; Birsin Ozcakar, Zeynep; Derya Aysev, Ahmet; Ciftci, Ergin; Ince, Erdal</p> <p>2016-10-01</p> <p>La peritonitis es un <span class="hlt">problema</span> grave en los niños que reciben diálisis peritoneal. La bacteria Campylobacter jejuni es una causa infrecuente de peritonitis. Un niño de 10 años de edad con insuficiencia renal terminal causada por síndrome urémico hemolítico atípico ingresó a nuestro hospital con dolor abdominal y fiebre. El líquido de la diálisis peritoneal era turbio; en el examen microscópico se observaron leucocitos abundantes. Se inició tratamiento con cefepime intraperitoneal. En el cultivo del líquido peritoneal se aisló Campylobacter jejuni, por lo que se agregó claritromicina oral al tratamiento. Al finalizar el tratamiento, el resultado del cultivo del líquido peritoneal era negativo. Hasta donde sabemos, no se había informado previamente peritonitis por C. jejuni en niños. Conclusión. Si bien la peritonitis por C. jejuni es rara en los niños, debe considerarse <span class="hlt">como</span> factor etiológico de la peritonitis.</p> </li> <li> <p><a target="_blank" onclick="trackOutboundLink('http://adsabs.harvard.edu/abs/2005BASBr..24b..21Z','NASAADS'); return false;" href="http://adsabs.harvard.edu/abs/2005BASBr..24b..21Z"><span>Uma Comparação entre Técnicas de Propagação de Erros em Astrofísica: Monte Carlo x Bootstrap</span></a></p> <p><a target="_blank" href="http://adsabs.harvard.edu/abstract_service.html">NASA Astrophysics Data System (ADS)</a></p> <p>Zabot, Alexandre; Baptista, Raymundo</p> <p>2005-07-01</p> <p>Neste trabalho é feito um estudo comparativo entre dois algoritmos numéricos usados para propagação de erros em dados experimentais. Um deles é conhecido por Método de Monte carlo e o outro por Método de Bootstrap. Recentemente, Dhullon & Watson argüiram que a aplicação do método de Monte Carlo introduz ruído nos dados, e propuseram então a utilização do Bootstrap <span class="hlt">como</span> alternativa capaz de produzir resultados superiores. O objetivo deste trabalho é testar a validade dessa afirmação. As duas técnicas foram aplicadas a três <span class="hlt">problemas</span> diferentes: o ajsute de modelos de emissão LTE simples e atmosfera estelar a espectros estelares observados e o ajuste de curvas de luz de eclipses de Variáveis Cataclísmicas para a detemrinação da distribuição radial de brilho dos seus discos de acréscimo. Os métodos foram testados quanto à sua robusteza, ou seja, a capacidade de prover resultados coerentes enre si. Além disso, as soluções dos métodos foram comparadas. Os resultados indicam que não existe evidência de superioridade de um métodos em relação ao outro.</p> </li> </ol> <div class="pull-right"> <ul class="pagination"> <li><a href="#" onclick='return showDiv("page_1");'>«</a></li> <li><a href="#" onclick='return showDiv("page_21");'>21</a></li> <li><a href="#" onclick='return showDiv("page_22");'>22</a></li> <li><a href="#" onclick='return showDiv("page_23");'>23</a></li> <li><a href="#" onclick='return showDiv("page_24");'>24</a></li> <li class="active"><span>25</span></li> <li><a href="#" onclick='return showDiv("page_25");'>»</a></li> </ul> </div> </div><!-- col-sm-12 --> </div><!-- row --> </div><!-- page_25 --> <center> <div class="footer-extlink text-muted"><small>Some links on this page may take you to non-federal websites. 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