Science.gov

Sample records for ou sistemas produtivos

  1. El Sistema's Open Secrets

    ERIC Educational Resources Information Center

    Booth, Eric

    2011-01-01

    In this article, the author talks about Venezuela's national youth orchestra program called El Sistema whose attributes offer a direct challenge to traditional Western music practices. As U.S. classical music--and all "high arts"--struggle to find relevance to more than the small "arts club" percentage of the U.S. populace, El…

  2. Tunable, nonlinear Hong-Ou-Mandel interferometer

    NASA Astrophysics Data System (ADS)

    Oehri, D.; Pletyukhov, M.; Gritsev, V.; Blatter, G.; Schmidt, S.

    2015-03-01

    We investigate the two-photon scattering properties of a Jaynes-Cummings (JC) nonlinearity consisting of a two-level system (qubit) interacting with a single-mode cavity, which is coupled to two waveguides, each containing a single incident photon wave packet initially. In this scattering setup, we study the interplay between the Hong-Ou-Mandel (HOM) effect arising due to quantum interference and effective photon-photon interactions induced by the presence of the qubit. We calculate the two-photon scattering matrix of this system analytically and identify signatures of interference and interaction in the second-order auto- and cross-correlation functions of the scattered photons. In the dispersive regime, when qubit and cavity are far detuned from each other, we find that the JC nonlinearity can be used as an almost linear, in situ tunable beam splitter giving rise to ideal Hong-Ou-Mandel interference, generating a highly path-entangled two-photon NOON state of the scattered photons. The latter manifests itself in strongly suppressed waveguide cross-correlations and Poissonian photon number statistics in each waveguide. If the two-level system and the cavity are on resonance, the JC nonlinearity strongly modifies the ideal HOM conditions leading to a smaller degree of path entanglement and sub-Poissonian photon number statistics. In the latter regime, we find that photon blockade is associated with bunched autocorrelations in both waveguides, while a two-polariton resonance can lead to bunched as well as antibunched correlations.

  3. Atomic Hong-Ou-Mandel experiment

    NASA Astrophysics Data System (ADS)

    Lopes, R.; Imanaliev, A.; Aspect, A.; Cheneau, M.; Boiron, D.; Westbrook, C. I.

    2015-04-01

    Two-particle interference is a fundamental feature of quantum mechanics, and is even less intuitive than wave-particle duality for a single particle. In this duality, classical concepts--wave or particle--are still referred to, and interference happens in ordinary space-time. On the other hand, two-particle interference takes place in a mathematical space that has no classical counterpart. Entanglement lies at the heart of this interference, as it does in the fundamental tests of quantum mechanics involving the violation of Bell's inequalities. The Hong, Ou and Mandel experiment is a conceptually simpler situation, in which the interference between two-photon amplitudes also leads to behaviour impossible to describe using a simple classical model. Here we report the realization of the Hong, Ou and Mandel experiment using atoms instead of photons. We create a source that emits pairs of atoms, and cause one atom of each pair to enter one of the two input channels of a beam-splitter, and the other atom to enter the other input channel. When the atoms are spatially overlapped so that the two inputs are indistinguishable, the atoms always emerge together in one of the output channels. This result opens the way to testing Bell's inequalities involving mechanical observables of massive particles, such as momentum, using methods inspired by quantum optics, and to testing theories of the quantum-to-classical transition. Our work also demonstrates a new way to benchmark non-classical atom sources that may be of interest for quantum information processing and quantum simulation.

  4. Atomic Hong-Ou-Mandel experiment.

    PubMed

    Lopes, R; Imanaliev, A; Aspect, A; Cheneau, M; Boiron, D; Westbrook, C I

    2015-04-02

    Two-particle interference is a fundamental feature of quantum mechanics, and is even less intuitive than wave-particle duality for a single particle. In this duality, classical concepts--wave or particle--are still referred to, and interference happens in ordinary space-time. On the other hand, two-particle interference takes place in a mathematical space that has no classical counterpart. Entanglement lies at the heart of this interference, as it does in the fundamental tests of quantum mechanics involving the violation of Bell's inequalities. The Hong, Ou and Mandel experiment is a conceptually simpler situation, in which the interference between two-photon amplitudes also leads to behaviour impossible to describe using a simple classical model. Here we report the realization of the Hong, Ou and Mandel experiment using atoms instead of photons. We create a source that emits pairs of atoms, and cause one atom of each pair to enter one of the two input channels of a beam-splitter, and the other atom to enter the other input channel. When the atoms are spatially overlapped so that the two inputs are indistinguishable, the atoms always emerge together in one of the output channels. This result opens the way to testing Bell's inequalities involving mechanical observables of massive particles, such as momentum, using methods inspired by quantum optics, and to testing theories of the quantum-to-classical transition. Our work also demonstrates a new way to benchmark non-classical atom sources that may be of interest for quantum information processing and quantum simulation.

  5. Thoughts on Seeing "El Sistema"

    ERIC Educational Resources Information Center

    Booth, Eric

    2009-01-01

    The FESNOJIV (the Spanish acronym for the State Foundation for the National System of Youth and Children's Orchestras), more commonly known as "El Sistema," teaches 300,000 of Venezuela's poorest children in the nationwide music learning program. Many begin attending the "nucleo" as early as age two or three, and the vast…

  6. Knowledge Exchange with Sistema Scotland

    ERIC Educational Resources Information Center

    Allan, Julie; Moran, Nikki; Duffy, Celia; Loening, Gica

    2010-01-01

    This paper reports on a knowledge exchange project, funded by the Scottish Funding Council and undertaken by a group of researchers from three higher education institutions in Scotland and the project partner, Sistema Scotland. This newly established charity is attempting to implement a major programme of social change, developed in Venezuela,…

  7. Sidi Ali Ou Azza (L4): A New Moroccan Fall

    NASA Astrophysics Data System (ADS)

    Chennaoui Aoudjehane, H.; Agee, C. B.; Aaranson, A.; Bouragaa, A.

    2016-08-01

    Sidi Ali Ou Azza is the latest meteorite fall in Morocco, it occurred on 28 July 2015 very close (about 40 km) to Tissint martian shergottite fall that occurred on 18 July 2011. It's one of the small group of 23 L4 ordinary chondrite falls.

  8. Eielson Air Force Base OU-1 baseline risk assessment

    SciTech Connect

    Jarvis, M.T.; Jarvis, T.T.; Van Houten, N.C.; Lewis, R.E.

    1993-09-01

    This Baseline Risk Assessment report is the second volume in a set of three volumes for operable Unit 1 (OU-1). The companion documents contain the Remedial Investigation and the Feasibility Study. Operable Unit 1 (OU-1) is one of several groups of hazardous waste sites located at Eielson Air Force Base (AFB) near Fairbanks, Alaska. The operable units at Eielson are typically characterized by petroleum, oil, lubricant/solvent contamination, and by the presence of organics floating at the water table. In 1989 and 1990, firms under contract to the Air Force conducted field studies to gather information about the extent of chemical contamination in soil, groundwater, and soil air pore space (soil gas) at the site. This report documents the results of a baseline risk assessment, which uses the 1989 and 1991 site characterization database to quantify the potential human health risk associated with past Base industrial activities in the vicinity of OU-1. Background data collected in 1992 were also used in the preparation of this report.

  9. Hong-Ou-Mandel Interference with a Single Atom

    PubMed Central

    Ralley, K. A.; Lerner, I. V.; Yurkevich, I. V.

    2015-01-01

    The Hong-Ou-Mandel (HOM) effect is widely regarded as the quintessential quantum interference phenomenon in optics. In this work we examine how nonlinearity can smear statistical photon bunching in the HOM interferometer. We model both the nonlinearity and a balanced beam splitter with a single two-level system and calculate a finite probability of anti-bunching arising in this geometry. We thus argue that the presence of such nonlinearity would reduce the visibility in the standard HOM setup, offering some explanation for the diminution of the HOM visibility observed in many experiments. We use the same model to show that the nonlinearity affects a resonant two-photon propagation through a two-level impurity in a waveguide due to a “weak photon blockade” caused by the impossibility of double-occupancy and argue that this effect might be stronger for multi-photon propagation. PMID:26365761

  10. Hong-Ou-Mandel Interference with a Single Atom

    NASA Astrophysics Data System (ADS)

    Ralley, K. A.; Lerner, I. V.; Yurkevich, I. V.

    2015-09-01

    The Hong-Ou-Mandel (HOM) effect is widely regarded as the quintessential quantum interference phenomenon in optics. In this work we examine how nonlinearity can smear statistical photon bunching in the HOM interferometer. We model both the nonlinearity and a balanced beam splitter with a single two-level system and calculate a finite probability of anti-bunching arising in this geometry. We thus argue that the presence of such nonlinearity would reduce the visibility in the standard HOM setup, offering some explanation for the diminution of the HOM visibility observed in many experiments. We use the same model to show that the nonlinearity affects a resonant two-photon propagation through a two-level impurity in a waveguide due to a “weak photon blockade” caused by the impossibility of double-occupancy and argue that this effect might be stronger for multi-photon propagation.

  11. Geology and hydrocarbon potential of the Oued Mya basin, Algeria

    SciTech Connect

    Benamrane, O.; Messaoudi, M.; Messelles, H. )

    1993-09-01

    The Oued Mya hydrocarbon system is located in the Sahara basin. It is one of the best producing basins in Algeria, along with the Ghadames and Illizi basins. The stratigraphic section consists of Paleozoic and Mesozoic, and is about 5000 m thick. This intracratonic basin is limited to the north by the Toughourt saddle, and to the west and east it is flanked by regional arches, Allal-Tilghemt and Amguid-Hassi Messaoud, which culminate in the super giant Hassi Messaoud and Hassi R'mel hydrocarbon accumulations, respectively, producing oil from the Cambrian sands and gas from the Trissic sands. The primary source rock in this basin is lower Silurian shale, with an average thickness of 50 m and a total organic carbon of 6% (14% in some cases). Results of maturation modeling indicate that the lower Silurian source is in the oil window. The Ordovician shales are also source rocks, but in a second order. Clastic reservoirs are in the Trissic sequence, which is mainly fluvial deposits with complex alluvial channels, and the main target in the basin. Clastic reservoirs in the lower Devonian section have a good hydrocarbon potential east of the basin through a southwest-northwest orientation. The Late Trissic-Early Jurassic evaporites that overlie the Triassic clastic interval and extend over the entire Oued Mya basin, are considered to be a super-seal evaporite package, which consists predominantly of anhydrite and halite. For paleozoic targets, a large number of potential seals exist within the stratigraphic column. This super seal does not present oil dismigration possibilities. We can infer that a large amount of the oil generated by the Silurian source rock from the beginning of Cretaceous until now still is not discovered and significantly greater volumes could be trapped within structure closures and mixed or stratigraphic traps related to the fluvial Triassic sandstones, marine Devonian sands, and Cambrian-Ordovician reservoirs.

  12. Hong Ou Mandel interferometer: A quantum measurement tool

    NASA Astrophysics Data System (ADS)

    Borjemscaia, Natalia

    Quantum computing research has been around for several decades, since it was first proposed by Richard Feynman. Many efforts have been made to utilize quantum systems in creation of new computing devices in the recent years. One of the essential tools used for characterization and manipulation of optical quantum systems is a Hong Ou Mandel (HOM) Interferometer. It is used in this work to provide information about propagation, distortion and degree of indistinguishability of single photons. This work provides complete characterization of an optical tunneling effect in dielectric Bragg gratings. Samples with different thin film configurations are examined and their corresponding propagation delay times are calculated with sub-femtosecond precision. It is determined that for specific configurations for dielectric stacks, propagation delays can exhibit superluminal behavior. The distortion due to this effect is also calculated using HOM profiles. HOM interferometer is also used to calculate the degree of coalescence between two dissimilar sources. Single photons generated by quantum dot emission and parametric down conversion are tailored through aggressive filtering techniques to be identical in their spectral, temporal and polarization profiles. The degree of their coalescence is then calculated in an attempt to create quantum interference. This work attempts to provide better understanding of single photon interactions through use of an HOM interferometer.

  13. El Sistema and American Music Education

    ERIC Educational Resources Information Center

    Lesniak, Melissa

    2012-01-01

    The brainchild of Jose Antonio Abreu, El Sistema, a music education program for aspiring orchestra musicians launched in Venezuela for students of limited means and now spreading to other parts of the world, has become a subject of interest to music teachers and teacher educators in North America. This article examines a bit of the program's…

  14. Dynamique sédimentaire comparative dans les bassins stéphano-permiens des Ida Ou Zal et Ida Ou Ziki, haut Atlas Occidental, MarocDynamic sedimentology of two Upper Stephano-Lower Permian basins: Ida Ou Zal and Ida Ou Ziki, western High Atlas, Morocco

    NASA Astrophysics Data System (ADS)

    Saber, H.; El-Wartiti, M.; Broutin, J.

    2001-05-01

    The intra-mountainous Ida Ou Zal Basin developed as a graben during the Stephanian (Carboniferous) and Lower Permian. Along its borders from east to west are the remnants of basal conglomerates. Passing laterally towards the centre of the basin are fine-grained fluvial-lacustrine sediments or flood-plain deposits. The important accumulation (1800 m) of sediments, associated with climatic and tectonic changes, caused substantial subsidence in a late orogenic setting. The remnants of sporadic volcanic products (shards) found in the Ida Ou Zal and the Ida Ou Zika Basins suggest nearby simultaneous magmatic activity. A comparison between the basins of Ida Ou Zal and Ida Ou Ziki suggest that the two basins formed a single unit, called the Souss Basin, ultimately terminated between the Lower Permian and Upper Permian times by a sinistral movement of the N70-80° Agadir Ou Anzizen Fault (west branch of the Tizi N'Test Fault) at the very end of the Hercynian Orogeny in Morocco.

  15. Caos en sistemas clásico-cuánticos

    NASA Astrophysics Data System (ADS)

    Dirani, L. D.; Núñez, J. A.

    Una de las formas de estudiar la existencia de caos en el comportamiento de un sistema clásico-cuántico, es truncando el espacio de Hilbert del sistema cuántico. El objetivo de este trabajo es analizar como afecta dicho truncamiento en la dinámica del sistema. Para tal fin se propone un Hamiltoniano integrable, cuyos valores de expectación asociados a coordenadas y momentos cuánticos responden, por el teorema de Ehrenfest, a un sistema de dos osciladores clásicos con acoplamiento lineal.

  16. Evolución estelar en sistemas binarios

    NASA Astrophysics Data System (ADS)

    De Vito, M. A.; Benvenuto, O.

    Definición y clasificación de sistemas binarios; descripción del comportamiento del sistema frente a la variación de su masa; binarias de rayos X; transferencia de masa en sistemas binarios masivos aplicado al posible esclarecimiento del progenitor azul de la supernova SN 1987A; comentario acerca de la evolución de enanas blancas de helio de baja masa y su conexión con los sistemas binarios; reseña del trabajo de Kippenhahn y Weigert sobre el cual está basado el código evolutivo desarrollado en la FCAG por el Dr. Benvenuto y sobre el cual se trabajará para poder incluir la evolución de una estrella con pérdida de masa perteneciente a un sistema binario.

  17. FIELD SCALE EVALUATION OF TREATMENT OF TCE IN A BIOWALL AT THE OU-1 SITE

    EPA Science Inventory

    A passive reactive barrier (Biowall) was installed at the OU-1 site at Altus Air Force Base, Oklahoma to treat TCE contamination in ground water from a landfill. Depth to ground water varies from 1.8 to 2.4 meters below land surface. To intercept and treat the plume of contamin...

  18. Gas physical conditions and kinematics of the giant outflow Ou4

    NASA Astrophysics Data System (ADS)

    Corradi, Romano L. M.; Grosso, Nicolas; Acker, Agnès; Greimel, Robert; Guillout, Patrick

    2014-10-01

    Context. The recently discovered bipolar outflow Ou4 has a projected size of more than one degree in the plane of the sky. It is apparently centred on the young stellar cluster - whose most massive representative is the triple system HR 8119 - inside the H ii region Sh 2-129. The driving source, the nature, and the distance of Ou4 are not known. Aims: The basic properties of Ou4 and its environment are investigated to shed light on the origin of this remarkable outflow. Methods: Deep narrow-band imagery of the whole nebula at arcsecond resolution was obtained to study the details of its morphology. Long-slit spectroscopy of the bipolar lobe tips was secured to determine the gas ionisation mechanism, physical conditions, and line-of-sight velocities. An estimate of the proper motions at the tip of the south lobe using archival plate images was attempted. The existing multi-wavelength data for Sh 2-129 and HR 8119 were also comprehensively reviewed. Results: The observed morphology of Ou4, its emission-line spatial distribution, line flux ratios, and the kinematic modelling developed adopting a bow-shock parabolic geometry, illustrate the expansion of a shock-excited fast collimated outflow. The observed radial velocities of Ou4 and its reddening are consistent with those of Sh 2-129 and HR 8119. The improved determination of the distance to HR 8119 (composed of two B0 V and one B0.5 V stars) and Sh 2-129 is 712 pc. We identify in WISE images at 22 μm an emission bubble of 5' radius (1 pc at the distance above) emitted by hot (107 K) dust grains, located inside the central part of Ou4 and corresponding to several [O iii] emission features of Ou4. Conclusions: The apparent position of Ou4 and the properties studied in this work are consistent with the hypothesis that Ou4 is located inside the Sh 2-129 H ii region, suggesting that it was launched some 90 000 yr ago by HR 8119. The outflow total kinetic energy is estimated to be ≈4 × 1047 ergs. However, we cannot

  19. Nuevos sistemas de frecuencia intermedia para el IAR

    NASA Astrophysics Data System (ADS)

    Olalde, J. C.; Perilli, D.; Larrarte, J. J.

    Se presenta el diagrama en bloques de los nuevos sistemas de Frecuencia Intermedia para los dos radiómetros instalados en el IAR. Entre las características más importantes del sistema podemos mencionar la posibilidad de conectar cualquiera de las dos antenas a los ``backend" disponibles: analizador espectral de alta resolución (META II) de 0,05 Hz, autocorrelador de 1008 canales y contínuo. Se incorporan al sistema nuevos sintetizadores de frecuencia implementados con PLL y la moderna técnica de síntesis digital directa. Por último, el conjunto del sistema es susceptible de ser configurado por las computadoras de adquisición de datos, supervisadas por otra, que entrega el estado de funcionamiento actual y evita la selección de configuraciones incorrectas por parte del usuario.

  20. Spatial and temporal variation of the water quality of an intermittent river - Oued Fez (Morrocco)

    NASA Astrophysics Data System (ADS)

    Perrin, Jean-Louis; Bellarbi, Meriem; Lombard-Latune, Rémi; Rais, Naoual; Chahinian, Nanée.; Ijjaali, Mustafa

    2010-05-01

    In the South of the Mediterranean basin, many rivers are characterized by an alternation of very long dry periods only cut by short flood events. Currently, the socio-economical development of these zones is limited by the water scarcity but also by the poor quality of the water resources. In fact, human activities, generally concentrated in overpopulated cities, generate large quantity of domestic and industrial effluents which are directly rejected in the environment without any treatment. In Morocco, the well known city of Fez illustrates perfectly this situation observed in all the Maghreb countries. During the dry period, the Oued Fez which crosses the city, is only fed by non-treated anthropogenic inputs. Accumulation of pollutants is observed in the river bed sediments. Domestic and industrial effluents (200 000 m3/day) pollute all the down stream water bodies some of which are used for irrigation and other for fresh water supply. During floods, mainly generated by urban runoff, river bed sediments could be remobilized and a significant flush effect could occur. This study aims at characterising and quantifying the pollutant concentrations and fluxes in various points of the Oued Fez hydrological network and assessing its impact on the Sebou River; water resources of this river being considered as national priority in Morocco. Due to the peculiar Mediterranean hydrological regime, specific observation networks are set up to assess the temporal and spatial variability of pollutant fluxes in the river and to rank water and pollutant sources. The sampling sites on the Fez and Sebou oueds are selected based these criteria. A reference station is chosen upstream of the Oued Fez less than 300 metres from the direct anthropic inputs. Water quality is evaluated through nutrients (Total nitrogen, and total phosphorus essentially), heavy metals (essentially chromium) and suspended solids. The results of 4 sampling campaigns indicate that: in terms of nitrogen

  1. El sistema ESO 296-IG 11

    NASA Astrophysics Data System (ADS)

    Agüero, E. L.; Paolantonio, S.

    El objeto ESO 296-IG 11 que se presenta en forma de ``V'' y posee destacadas condensaciones a lo largo de cada una de sus dos ramas, las que son de igual extensión (~ 1'), es estudiado en base a material espectroscópico obtenido en el CASLEO. Así se establecen las principales características espectrales, las condiciones físicas y los mecanismos de excitación dominantes de las zonas más notables de su estructura, como así también la distribución de su extinción interna y la variación del grado de excitación de las mismas. Del análisis de las velocidades radiales se determina que se trata de dos galaxias de tipo disco que se están interpenetrando y que conforman un sistema triple junto con una galaxia de contorno elíptico y tamaño considerablemente menor (0.2') que se encuentra a ~ 1.3' del punto de intersección de las dos primeras, ubicada sobre la dirección que contiene a una de éstas y hacia la que se extienden unas débiles y largas prolongaciones de la otra.

  2. Hong-Ou-Mandel interferometer with one and two photon pairs

    NASA Astrophysics Data System (ADS)

    Cosme, Olavo; Pádua, S.; Bovino, Fabio A.; Mazzei, A.; Sciarrino, Fabio; de Martini, Francesco

    2008-05-01

    We study the Hong-Ou-Mandel interferometer in the regime of spontaneous parametric down-conversion with high pump beam power at the crystal. In this regime one and two photons from a pump pulsed laser beam generate one and two pairs of photons, respectively. These photons are then directed to the beam splitter of the interferometer and detected at its exit in coincidence. An interesting phenomenon is observed: The reduction of the visibility of the Hong-Ou-Mandel coincidence peak (or dip) with the increase of pump power. We study the relation between the visibility of the fourth-order interference pattern and the power of the pumping laser beam for type I and type II phase-matching crystals. Our theoretical calculations are in good agreement with the experimental results.

  3. Hong-Ou-Mandel Interference between Two Deterministic Collective Excitations in an Atomic Ensemble.

    PubMed

    Li, Jun; Zhou, Ming-Ti; Jing, Bo; Wang, Xu-Jie; Yang, Sheng-Jun; Jiang, Xiao; Mølmer, Klaus; Bao, Xiao-Hui; Pan, Jian-Wei

    2016-10-28

    We demonstrate deterministic generation of two distinct collective excitations in one atomic ensemble, and we realize the Hong-Ou-Mandel interference between them. Using Rydberg blockade we create single collective excitations in two different Zeeman levels, and we use stimulated Raman transitions to perform a beam-splitter operation between the excited atomic modes. By converting the atomic excitations into photons, the two-excitation interference is measured by photon coincidence detection with a visibility of 0.89(6). The Hong-Ou-Mandel interference witnesses an entangled NOON state of the collective atomic excitations, and we demonstrate its two times enhanced sensitivity to a magnetic field compared with a single excitation. Our work implements a minimal instance of boson sampling and paves the way for further multimode and multiexcitation studies with collective excitations of atomic ensembles.

  4. Complete three photon Hong-Ou-Mandel interference at a three port device.

    PubMed

    Mährlein, Simon; von Zanthier, Joachim; Agarwal, Girish S

    2015-06-15

    We report the possibility of completely destructive interference of three indistinguishable photons on a three port device providing a generalisation of the well known Hong-Ou-Mandel interference of two indistinguishable photons on a two port device. Our analysis is based on the underlying mathematical framework of SU(3) transformations rather than SU(2) transformations. We show the completely destructive three photon interference for a large range of parameters of the three port device and point out the physical origin of such interference in terms of the contributions from different quantum paths. As each output port can deliver zero to three photons the device generates higher dimensional entanglement. In particular, different forms of entangled states of qudits can be generated depending on the device parameters. Our system is different from a symmetric three port beam splitter which does not exhibit a three photon Hong-Ou-Mandel interference.

  5. Hong-Ou-Mandel Interference between Two Deterministic Collective Excitations in an Atomic Ensemble

    NASA Astrophysics Data System (ADS)

    Li, Jun; Zhou, Ming-Ti; Jing, Bo; Wang, Xu-Jie; Yang, Sheng-Jun; Jiang, Xiao; Mølmer, Klaus; Bao, Xiao-Hui; Pan, Jian-Wei

    2016-10-01

    We demonstrate deterministic generation of two distinct collective excitations in one atomic ensemble, and we realize the Hong-Ou-Mandel interference between them. Using Rydberg blockade we create single collective excitations in two different Zeeman levels, and we use stimulated Raman transitions to perform a beam-splitter operation between the excited atomic modes. By converting the atomic excitations into photons, the two-excitation interference is measured by photon coincidence detection with a visibility of 0.89(6). The Hong-Ou-Mandel interference witnesses an entangled NOON state of the collective atomic excitations, and we demonstrate its two times enhanced sensitivity to a magnetic field compared with a single excitation. Our work implements a minimal instance of boson sampling and paves the way for further multimode and multiexcitation studies with collective excitations of atomic ensembles.

  6. Caracterisation des proprietes acoustiques des materiaux poreux a cellules ouvertes et a matrice rigide ou souple

    NASA Astrophysics Data System (ADS)

    Salissou, Yacoubou

    L'objectif global vise par les travaux de cette these est d'ameliorer la caracterisation des proprietes macroscopiques des materiaux poreux a structure rigide ou souple par des approches inverses et indirectes basees sur des mesures acoustiques faites en tube d'impedance. La precision des approches inverses et indirectes utilisees aujourd'hui est principalement limitee par la qualite des mesures acoustiques obtenues en tube d'impedance. En consequence, cette these se penche sur quatre problemes qui aideront a l'atteinte de l'objectif global precite. Le premier probleme porte sur une caracterisation precise de la porosite ouverte des materiaux poreux. Cette propriete en est une de passage permettant de lier la mesure des proprietes dynamiques acoustiques d'un materiau poreux aux proprietes effectives de sa phase fluide decrite par les modeles semi-phenomenologiques. Le deuxieme probleme traite de l'hypothese de symetrie des materiaux poreux selon leur epaisseur ou un index et un critere sont proposes pour quantifier l'asymetrie d'un materiau. Cette hypothese est souvent source d'imprecision des methodes de caracterisation inverses et indirectes en tube d'impedance. Le critere d'asymetrie propose permet ainsi de s'assurer de l'applicabilite et de la precision de ces methodes pour un materiau donne. Le troisieme probleme vise a mieux comprendre le probleme de transmission sonore en tube d'impedance en presentant pour la premiere fois un developpement exact du probleme par decomposition d'ondes. Ce developpement permet d'etablir clairement les limites des nombreuses methodes existantes basees sur des tubes de transmission a 2, 3 ou 4 microphones. La meilleure comprehension de ce probleme de transmission est importante puisque c'est par ce type de mesures que des methodes permettent d'extraire successivement la matrice de transfert d'un materiau poreux et ses proprietes dynamiques intrinseques comme son impedance caracteristique et son nombre d'onde complexe. Enfin, le

  7. How nonlinear optical effects degrade Hong-Ou-Mandel like interference

    NASA Astrophysics Data System (ADS)

    Mirza, Imran M.; van Enk, S. J.

    2015-05-01

    Two-photon interference effects, such as the Hong-Ou-Mandel (HOM) effect, can be used to characterize to what extent two photons are identical [20]. Furthermore, these interference effects underly linear optics quantum computation. We show here how nonlinear optical effects, such as those mediated by atoms or quantum dots in a cavity, degrade the interference. This implies that, on the one hand, nonlinearities are to be avoided if one wishes to utilize the interference, but on the other hand, one may be able to measure or detect nonlinearities by observing the disappearance of the interference.

  8. Hong-Ou-Mandel interference between triggered and heralded single photons from separate atomic systems

    NASA Astrophysics Data System (ADS)

    Leong, Victor; Kosen, Sandoko; Srivathsan, Bharath; Gulati, Gurpreet Kaur; Cerè, Alessandro; Kurtsiefer, Christian

    2015-06-01

    We present Hong-Ou-Mandel interference of single photons generated via two different physical processes by two independent atomic systems: scattering by a single atom, and parametric generation via four-wave mixing in a cloud of cold atoms. Without any spectral filtering, we observe a visibility of V =62 ±4 % . After correcting for accidental coincidences, we obtain V =93 ±6 % . The observed interference demonstrates the compatibility of the two sources, forming the basis for an efficient quantum interface between different physical systems.

  9. Sistemas de cúmulos globulares extragalácticos

    NASA Astrophysics Data System (ADS)

    Forte, J. C.

    Se describen las características de los sistemas de cúmulos globulares asociados a galaxias elípticas en una variedad de medios y, en particular, aquellas vinculadas con la distribución espacial, frecuencia específica y composición química. Esta discusión se hace dentro de un conjunto de esquemas orientados a explicar las primeras fases de la formación de las galaxias dominantes en cúmulos y del rol de los sistemas de cúmulos globulares en esos procesos.

  10. 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.

  11. Sistemas Correctores de Campo Para EL Telescopio Cassegrain IAC80

    NASA Astrophysics Data System (ADS)

    Galan, M. J.; Cobos, F. J.

    1987-05-01

    El proyecto de instrumentación de mayor importancia que ha tenido el Instituto de Astrofisica de Canarias en los últimos afios ha sido el diseflo y construcción del te1escopio IAC8O. Este requería del esfuerzo con junto en mec´nica, óptica y electrónica, lo que facilitó la estructuración y el crecimiento de los respectivos grupos de trabajo, que posteriormente se integraron en departamentos En su origen (1977), el telescopio IAC80 fue concebido como un sistema clásico tipo Cassegrain, con una razón focal F/i 1.3 para el sistema Casse grain y una razón focal F/20 para el sistema Coudé. Posteriormente, aunque se mantuvo la filosofia de que el sistema básico fuera el F/11.3, se consideró conveniente el diseño de secundarios para razones focales F/16 y F/32, y se eliminó el de F/20. Sin embargo, dada la importancia relativa que un foco estrictamente fotográfico tiene en un telescopio moderno, diseñado básicamente para fotometría fotoeléctrica y con un campo util mínimamente de 40 minutos de arco, se decídió Ilevar a cabo el diseño de un secundario F/8 con un sistema corrector de campo, pero que estuviera formado únicamente por lentes con superficies esféricas para que asl su construcción fuera posible en España ó en México. La creciente utilización de detectores bidimensionales para fines de investigación astron6mica y la viabilidad de que en un futuro cercano éstos tengan un área sensible cada vez mayor, hicieron atractiva la idea de tener diseñado un sistema corrector de campo para el foco primario (F/3), con un campo útil mínimo de un grado, y también con la limitante de que sus componentes tuvieron sólamente supérficies esféricas. Ambos diseños de los sis-temas correctores de campo se llevaron a cabo, en gran medida, como parte de un proyecto de colaboración e intercambio en el área de diseño y evaluación de sistemas ópticos.

  12. Tolerance and biomarkers as useful tools for assessing environmental quality in the Oued Souss estuary (Bay of Agadir, Morocco).

    PubMed

    Ait Alla, A; Mouneyrac, C; Durou, C; Moukrim, A; Pellerin, J

    2006-05-01

    The aim of this study was to assess aquatic environmental quality of Oued Souss (Agadir, Morocco). This estuary has been subjected for a long time to large amounts of sewage discharges and industrial effluents. Since November 2002, no waste outlets have been discharged in this site due to their connection to a wastewater purification plant. Firstly, we have compared metal tolerance of the annelid polychaete (Nereis diversicolor) originating from Oued Souss and a relatively clean site (Oualidia, Morocco). Secondly, we have evaluated with a multi-marker approach (acetylcholinesterase [AChE], glutathione-S-transferases [GSTs], catalase, thiobarbituric acid reactive substances [TBARs]) responses of worms to the pollution gradient. Results have shown that worms from Oued Souss have acquired tolerance to copper and zinc due to a long-term sub-lethal metal exposure and this metal tolerance was maintained in spite of the end of wastewater discharges in this site. Higher catalase, GSTs and TBARs values have been observed in worms from Oued Souss sampled before implantation of wastewater treatment. The multi-marker approach confirms that these worms have been submitted to various contaminants. In contrast, high inhibition in AChE activities measured in worms from Oued Souss could be explained by the continuous agricultural influence of nearest areas. The level of contamination was probably maintained since biomarker values were generally higher in worms from Oued Souss when compared to Oualidia.

  13. Nonlinear optical effects and Hong-Ou-Mandel interference in cavity quantum electrodynamics

    NASA Astrophysics Data System (ADS)

    Mirza, Imran M.; van Enk, Steven J.

    Pure quantum interference among single photons is one of the key ingredients to perform linear optics quantum computation (LOQC). The Hong-Ou-Mandel interference (HOMI) [C. K. Hong, Z. Y. Ou and L. Mandel, Phys. Rev. Lett. 59, (18), 2044-2046 (1987)] i.e. complete destructive interference between two identical and indistinguishable photons simultaneously entering input ports of a 50/50 beam splitter, is a well-known example in this context. In this talk, I'll present our theoretical study of HOMI in a coupled Jaynes-Cummings array. In particular and by applying quantum jump/trajectory formalism, I'll focus on how partial quantum interference between two photons survive both non-linearities produced by two-level emitter and spectral filtering due to optical cavities in our coupled cavity array setup [Imran M. Mirza and Steven J. van Enk, Opt. Comm. 343, 172-177 (2015)]. Along with LOQC, this work is crucial from the perspective of exploiting coupled cavity arrays to store single photons reliably (without altering their temporal and spectral traits) [Imran M. Mirza, Steven J. van Enk and Jeff Kimble, JOSA B, 10, 2640-2649, (2013)].

  14. Water quality assessment of a highly polluted Mediterranean River - Oued Fez (Morocco)

    NASA Astrophysics Data System (ADS)

    Perrin, J.-L.; Bellarbi, M.; Raïs, N.; Chahinian, N.; Moulin, P.; Ijjaali, M.

    2012-04-01

    In the South of the Mediterranean basin, many rivers are characterized by an alternation of very long dry periods only cut by short flood events. Currently, the socio-economical development of these zones is limited by water scarcity and poor quality of the water resources. Indeed human activities, generally concentrated in overpopulated cities, generate large quantity of domestic and industrial effluents which are directly rejected in the environment without any treatment. In Morocco, the well known city of Fez illustrates perfectly this situation, observed in most developing countries. The oued Fez receives continuously the non-treated domestic and industrial effluents (90.000 m3/day) of the city and pollutes all the downstream water bodies. Indeed, it is a tributary of the Sebou River, a major body of great economical importance used for irrigation and freshwater supply. This study aims at characterising and quantifying the pollutant concentrations and fluxes in various points of oued Fez's hydrological network and assessing its impact on the Sebou River; this river's preservation being considered a national priority in Morocco. A coupled water quality-water quantity monitoring scheme has been implemented on oued Fez since 2008. In addition to basic hydrological data, water quality samples are collected at regular intervals at 8 locations where discharge is simultaneously measured using an Acoustic Doppler Current Profiler (ADCP). Water samples are analysed for different forms of nitrogen (nitrates, nitrites, ammonium and total nitrogen), phosphorus (soluble reactive phosphorus and total phosphorus) but also total chromium which is used in the leather tanning processes, one of the most important industrial production of the city of Fez, using a photospectrometer (Hach Lange DR 2800 VIS-photometer (Germany). The results of 17 sampling campaigns, carried out over 3 hydrological years, indicate that the rural areas contribute mostly to baseflow during the wet

  15. The Story of Carora: The Origins of El Sistema

    ERIC Educational Resources Information Center

    Carlson, Alexandra

    2016-01-01

    Venezuela's youth symphony program, the Fundación Musical Simón Bolívar, commonly referred to as "El Sistema," combines musical achievement with learning important life skills through orchestral practice and performance. Although the history most commonly reported outside Venezuela is of the program's director, José Antonio Abreu,…

  16. Interactions between the hydrology and hydrochemistry of an intermittent southern Mediterranean River- Oued Fez (Morocco)

    NASA Astrophysics Data System (ADS)

    Perrin, J.-L.; Bellarbi, M.; Chahinian, N.; Raïs, N.; Moulin, P.; Ijjaali, M.

    2012-04-01

    Mediterranean catchments are often characterized by highly variable rainfall inputs and intermittent flows. In comparison to the existing knowledge on their hydrological behaviour, the interactions between flow conditions and pollution levels remain less documented. This study aims at filling that gap through a case study on Oued Fez (Morocco). Oued Fez is an intermittent river located in central-eastern Morocco. It has a 615 km2 catchment 10% of which corresponds to the city of Fez, the 3rd biggest in the kingdom (1.2 M inhabitants). Oued Fes is a tributary of the Sebou River, a major body of great economical importance used for irrigation and freshwater supply. A coupled water quality-water quantity monitoring scheme has been implemented on Oued Fez since 2008. In addition to basic hydrological data, water quality samples are collected at regular intervals at 8 locations where discharge is simultaneously measured using an Acoustic Doppler Current Profiler (ADCP). Water samples are analysed for different forms of nitrogen (nitrates, nitrites, ammonium and total nitrogen) and phosphorus (soluble reactive phosphorus and total phosphorus) using a photospectrometer (Hach Lange DR 2800 VIS-photometer (Germany). The results of the study indicate that, despite variations in annual rainfall, the catchment's hydrological response is controlled by the urban impervious zones during floods. The rural areas contribute mostly to baseflow during the wet period while non-treated anthropogenic inputs constitute most of the flow during the dry period. This in turn affects the water quality results. Indeed: - during low flow conditions the pollution levels are very high and total nitrogen and total phosphorus concentrations reach 45 mg/l N and 6.5 mg/l P respectively at the most polluted sites. - during average and high flow conditions the pollution levels decrease due to dilution. Total nitrogen and total phosphorus concentrations reach 32 mg/l N and 3.5 mg/l P respectively with

  17. Hong-Ou-Mandel experiment for temporal investigation of single-electron fractionalization.

    PubMed

    Freulon, V; Marguerite, A; Berroir, J-M; Plaçais, B; Cavanna, A; Jin, Y; Fève, G

    2015-04-21

    Coulomb interaction has a striking effect on electronic propagation in one-dimensional conductors. The interaction of an elementary excitation with neighbouring conductors favours the emergence of collective modes, which eventually leads to the destruction of the Landau quasiparticle. In this process, an injected electron tends to fractionalize into separated pulses carrying a fraction of the electron charge. Here we use two-particle interferences in the electronic analogue of the Hong-Ou-Mandel experiment in a quantum Hall conductor at filling factor 2 to probe the fate of a single electron emitted in the outer edge channel and interacting with the inner one. By studying both channels, we analyse the propagation of the single electron and the generation of interaction-induced collective excitations in the inner channel. These complementary pieces of information reveal the fractionalization process in the time domain and establish its relevance for the destruction of the quasiparticle, which degrades into the collective modes.

  18. Laser cooling atoms to indistinguishability: Atomic Hong-Ou-Mandel interference and entanglement through spin exchange

    NASA Astrophysics Data System (ADS)

    Kaufman, Adam

    2016-05-01

    Motional control of neutral atoms has a rich history and increasingly interest has turned to single-atom control. In my thesis work, we created a platform to individually prepare single bosonic atoms in highly pure quantum states, by developing methods to laser cool single atoms to the vibrational ground state of optical tweezer traps. Applying this toolset, we observe the atomic Hong-Ou-Mandel effect when we arrange for atom tunneling to play the role of a balanced beam splitter between two optical tweezers. In another experiment, we utilize spin exchange to create entanglement, which we then verify after spatially separating the atoms to observe their non-local correlations. Merging these results with our recent demonstration of deterministic loading of atomic arrays, our results establish the concept of quantum gas assembly, which could be applied to a variety of systems ranging from the production of single dipolar molecules to the assembly of low-entropy arrays of atoms.

  19. Multiparticle Correlations in Mesoscopic Scattering: Boson Sampling, Birthday Paradox, and Hong-Ou-Mandel Profiles

    NASA Astrophysics Data System (ADS)

    Urbina, Juan-Diego; Kuipers, Jack; Matsumoto, Sho; Hummel, Quirin; Richter, Klaus

    2016-03-01

    The interplay between single-particle interference and quantum indistinguishability leads to signature correlations in many-body scattering. We uncover these with a semiclassical calculation of the transmission probabilities through mesoscopic cavities for systems of noninteracting particles. For chaotic cavities we provide the universal form of the first two moments of the transmission probabilities over ensembles of random unitary matrices, including weak localization and dephasing effects. If the incoming many-body state consists of two macroscopically occupied wave packets, their time delay drives a quantum-classical transition along a boundary determined by the bosonic birthday paradox. Mesoscopic chaotic scattering of Bose-Einstein condensates is, then, a realistic candidate to build a boson sampler and to observe the macroscopic Hong-Ou-Mandel effect.

  20. Two-dimensional fermionic Hong-Ou-Mandel interference with massless Dirac fermions

    NASA Astrophysics Data System (ADS)

    Khan, M. A.; Leuenberger, Michael N.

    2014-08-01

    We propose a two-dimensional Hong-Ou-Mandel (HOM) type interference experiment for massless Dirac fermions in graphene and 3D topological insulators. Since massless Dirac fermions exhibit linear dispersion, similar to photons in vacuum, they can be used to obtain the HOM interference intensity pattern as a function of the delay time between two massless Dirac fermions. We show that while the Coulomb interaction leads to a significant change in the angle dependence of the tunneling of two identical massless Dirac fermions incident from opposite sides of a potential barrier, it does not affect the HOM interference pattern. We apply our formalism to develop a massless Dirac fermion beam splitter (BS) for controlling the transmission and reflection coefficients. We calculate the resulting time-resolved correlation function for two identical massless Dirac fermions scattering off the BS.

  1. Effects of interactions on the generalized Hong-Ou-Mandel effect

    NASA Astrophysics Data System (ADS)

    Gertjerenken, B.; Kevrekidis, P. G.

    2015-09-01

    We numerically investigate the influence of interactions on the generalized Hong-Ou-Mandel (HOM) effect for bosonic particles in a (quasi-)one-dimensional set-up with weak harmonic confinement and show results for the cases of N = 2, N = 3 and N = 4 bosons interacting with a beam splitter, whose role is played by a δ-barrier. In particular, we focus on the effect of attractive interactions and compare the results with the repulsive case, as well as with the analytically available results for the non-interacting case (that we use as a benchmark). We observe a fermionization effect both for growing repulsive and attractive interactions, i.e., the dip in the HOM coincidence count is progressively smeared out, for increasing interaction strengths. The role of input asymmetries is also explored.

  2. Hong-Ou-Mandel interference of entangled Hermite-Gauss modes

    NASA Astrophysics Data System (ADS)

    Zhang, Yingwen; Prabhakar, Shashi; Rosales-Guzmán, Carmelo; Roux, Filippus S.; Karimi, Ebrahim; Forbes, Andrew

    2016-09-01

    Hong-Ou-Mandel (HOM) interference is demonstrated experimentally for entangled photon pairs in the Hermite-Gauss (HG) basis. We use two Dove prisms in one of the paths of the photons to manipulate the entangled quantum state that enters the HOM interferometer. It is demonstrated that, when entangled photon pairs are in a symmetric Bell state in the Laguerre-Gauss (LG) basis, they will remain symmetric after decomposing them into the HG basis, thereby resulting in no coincidence events after the HOM interference. On the other hand, if the photon pairs are in an antisymmetric Bell state in the LG basis, then they will also be antisymmetric in the HG basis, thereby producing only coincidence events as a result of the HOM interference.

  3. Measurement of photon indistinguishability to a quantifiable uncertainty using a Hong-Ou-Mandel interferometer

    SciTech Connect

    Thomas, Peter J.; Cheung, Jessica Y.; Chunnilall, Christopher J.; Dunn, Malcolm H.

    2010-04-10

    We present a method for using the Hong-Ou-Mandel (HOM) interference technique to quantify photon indistinguishability within an associated uncertainty. The method allows the relative importance of various experimental factors affecting the HOM visibility to be identified, and enables the actual indistinguishability, with an associated uncertainty, to be estimated from experimentally measured quantities. A measurement equation has been derived that accounts for the non-ideal performance of the interferometer. The origin of each term of the equation is explained, along with procedures for their experimental evaluation and uncertainty estimation. These uncertainties are combined to give an overall uncertainty for the derived photon indistinguishability. The analysis was applied to measurements from an interferometer sourced with photon pairs from a parametric downconversion process. The measured photon indistinguishably was found to be 0.954+/-0.036 by using the prescribed method.

  4. Hong-Ou-Mandel experiment for temporal investigation of single-electron fractionalization

    PubMed Central

    Freulon, V.; Marguerite, A.; Berroir, J.-M.; Plaçais, B.; Cavanna, A.; Jin, Y.; Fève, G.

    2015-01-01

    Coulomb interaction has a striking effect on electronic propagation in one-dimensional conductors. The interaction of an elementary excitation with neighbouring conductors favours the emergence of collective modes, which eventually leads to the destruction of the Landau quasiparticle. In this process, an injected electron tends to fractionalize into separated pulses carrying a fraction of the electron charge. Here we use two-particle interferences in the electronic analogue of the Hong-Ou-Mandel experiment in a quantum Hall conductor at filling factor 2 to probe the fate of a single electron emitted in the outer edge channel and interacting with the inner one. By studying both channels, we analyse the propagation of the single electron and the generation of interaction-induced collective excitations in the inner channel. These complementary pieces of information reveal the fractionalization process in the time domain and establish its relevance for the destruction of the quasiparticle, which degrades into the collective modes. PMID:25896625

  5. Interactions and Charge Fractionalization in an Electronic Hong-Ou-Mandel Interferometer

    NASA Astrophysics Data System (ADS)

    Wahl, Claire; Rech, Jérôme; Jonckheere, Thibaut; Martin, Thierry

    2014-01-01

    We consider an electronic analog of the Hong-Ou-Mandel (HOM) interferometer, where two single electrons travel along opposite chiral edge states and collide at a quantum point contact. Studying the current noise, we show that because of interactions between copropagating edge states, the degree of indistinguishability between the two electron wave packets is dramatically reduced, leading to reduced contrast for the HOM signal. This decoherence phenomenon strongly depends on the energy resolution of the packets. Insofar as interactions cause charge fractionalization, we show that charge and neutral modes interfere with each other, leading to satellite dips or peaks in the current noise. Our calculations explain recent experimental results [E. Bocquillon, et al., Science 339, 1054 (2013)] where an electronic HOM signal with reduced contrast was observed.

  6. Spectrally resolved Hong-Ou-Mandel interference between independent photon sources

    NASA Astrophysics Data System (ADS)

    Jin, Rui-Bo; Gerrits, Thomas; Fujiwara, Mikio; Wakabayashi, Ryota; Yamashita, Taro; Miki, Shigehito; Terai, Hirotaka; Shimizu, Ryosuke; Takeoka, Masahiro; Sasaki, Masahide

    2015-11-01

    Hong-Ou-Mandel (HOM) interference between independent photon sources (HOMI-IPS) is the fundamental block for quantum information processing, such as quantum gate, Shor's algorithm, Boson sampling, etc. All the previous HOMI-IPS experiments were carried out in time-domain, however, the spectral information during the interference was lost, due to technical difficulties. Here, we investigate the HOMI-IPS in spectral domain using the recently developed fast fiber spectrometer, and demonstrate the spectral distribution during the HOM interference between two heralded single-photon sources, and two thermal sources. This experiment can not only deepen our understanding of HOMI-IPS in the spectral domain, but also be utilized to improve the visibility by post-processing spectral filtering.

  7. Hong-Ou-Mandel interference of two phonons in trapped ions

    NASA Astrophysics Data System (ADS)

    Toyoda, Kenji; Hiji, Ryoto; Noguchi, Atsushi; Urabe, Shinji

    2015-11-01

    The quantum statistics of bosons and fermions manifest themselves in the manner in which two indistinguishable particles interfere quantum mechanically. When two photons, which are bosonic particles, enter a beam-splitter with one photon in each input port, they bunch together at either of the two output ports. The corresponding disappearance of the coincidence count is the Hong-Ou-Mandel effect. Here we show the phonon counterpart of this effect in a system of trapped-ion phonons, which are collective excitations derived by quantizing vibrational motions that obey Bose-Einstein statistics. We realize a beam-splitter transformation of the phonons by employing the mutual Coulomb repulsion between ions, and perform a two-phonon quantum interference experiment using that transformation. We observe an almost perfect disappearance of the phonon coincidence between two ion sites, confirming that phonons can be considered indistinguishable bosonic particles. The two-particle interference demonstrated here is purely a quantum effect, without a classical counterpart, hence it should be possible to demonstrate the existence of entanglement on this basis. We attempt to generate an entangled state of phonons at the centre of the Hong-Ou-Mandel dip in the coincidence temporal profile, under the assumption that the entangled phonon state is successfully generated if the fidelity of the analysis pulses is taken into account adequately. Two-phonon interference, as demonstrated here, proves the bosonic nature of phonons in a trapped-ion system. It opens the way to establishing phonon modes as carriers of quantum information in their own right, and could have implications for the quantum simulation of bosonic particles and analogue quantum computation via boson sampling.

  8. Hong-Ou-Mandel interference of two phonons in trapped ions.

    PubMed

    Toyoda, Kenji; Hiji, Ryoto; Noguchi, Atsushi; Urabe, Shinji

    2015-11-05

    The quantum statistics of bosons and fermions manifest themselves in the manner in which two indistinguishable particles interfere quantum mechanically. When two photons, which are bosonic particles, enter a beam-splitter with one photon in each input port, they bunch together at either of the two output ports. The corresponding disappearance of the coincidence count is the Hong-Ou-Mandel effect. Here we show the phonon counterpart of this effect in a system of trapped-ion phonons, which are collective excitations derived by quantizing vibrational motions that obey Bose-Einstein statistics. We realize a beam-splitter transformation of the phonons by employing the mutual Coulomb repulsion between ions, and perform a two-phonon quantum interference experiment using that transformation. We observe an almost perfect disappearance of the phonon coincidence between two ion sites, confirming that phonons can be considered indistinguishable bosonic particles. The two-particle interference demonstrated here is purely a quantum effect, without a classical counterpart, hence it should be possible to demonstrate the existence of entanglement on this basis. We attempt to generate an entangled state of phonons at the centre of the Hong-Ou-Mandel dip in the coincidence temporal profile, under the assumption that the entangled phonon state is successfully generated if the fidelity of the analysis pulses is taken into account adequately. Two-phonon interference, as demonstrated here, proves the bosonic nature of phonons in a trapped-ion system. It opens the way to establishing phonon modes as carriers of quantum information in their own right, and could have implications for the quantum simulation of bosonic particles and analogue quantum computation via boson sampling.

  9. The different origins of magnetic fields and activity in the Hertzsprung gap stars, OU Andromedae and 31 Comae

    NASA Astrophysics Data System (ADS)

    Borisova, A.; Aurière, M.; Petit, P.; Konstantinova-Antova, R.; Charbonnel, C.; Drake, N. A.

    2016-06-01

    Context. When crossing the Hertzsprung gap, intermediate-mass stars develop a convective envelope. Fast rotators on the main sequence, or Ap star descendants, are expected to become magnetic active subgiants during this evolutionary phase. Aims: We compare the surface magnetic fields and activity indicators of two active, fast rotating red giants with similar masses and spectral class but different rotation rates - OU And (Prot = 24.2 d) and 31 Com (Prot = 6.8 d) - to address the question of the origin of their magnetism and high activity. Methods: Observations were carried out with the Narval spectropolarimeter in 2008 and 2013. We used the least-squares deconvolution (LSD) technique to extract Stokes V and I profiles with high signal-to-noise ratio to detect Zeeman signatures of the magnetic field of the stars. We then provide Zeeman-Doppler imaging (ZDI), activity indicators monitoring, and a precise estimation of stellar parameters. We use state-of-the-art stellar evolutionary models, including rotation, to infer the evolutionary status of our giants, as well as their initial rotation velocity on the main sequence, and we interpret our observational results in the light of the theoretical Rossby numbers. Results: The detected magnetic field of OU Andromedae (OU And) is a strong one. Its longitudinal component Bl reaches 40 G and presents an about sinusoidal variation with reversal of the polarity. The magnetic topology of OU And is dominated by large-scale elements and is mainly poloidal with an important dipole component, as well as a significant toroidal component. The detected magnetic field of 31 Comae (31 Com) is weaker, with a magnetic map showing a more complex field geometry, and poloidal and toroidal components of equal contributions. The evolutionary models show that the progenitors of OU And and 31 Com must have been rotating at velocities that correspond to 30 and 53%, respectively, of their critical rotation velocity on the zero age main sequence

  10. El Sistema de Referencia Celeste convencional de la IAU

    NASA Astrophysics Data System (ADS)

    Arias, E. F.

    La Unión Astronómica Internacional (IAU) recomendó la adopción de un nuevo sistema de referencia celeste baricéntrico cuyo plano fundamental y origen de ascensiones rectas estén próximos, respectivamente, al ecuador y equinoccio dinámicos J2000.0. El nuevo sistema de referencia estará materializado por las posiciones J2000.0 de radiofuentes extragalácticas determinadas con la técnica de interferometría de larga línea de base (VLBI). El Working Group on Reference Frames de la IAU (WGRF) decidió adoptar (Grasse, 1995) al sistema de referencia celeste extragaláctico del Servicio Internacional de la Rotación Terrestre (IERS) como futuro sistema de referencia celeste convencional bajo el nombre International Celestial Reference System (ICRS) y encomendó su mantenimiento futuro al IERS. El marco de referencia que materializará al ICRS contiene posiciones precisas J2000.0 de más de 600 radiofuentes extragalácticas. Las coordenadas fueron ajustadas en una única solución VLBI en la cual se incluyeron todas las observaciones realizadas hasta octubre de 1995 con la técnica de adquisición de datos VLBI Mark III. Para minimizar los errores sistemáticos que pueden afectar la calidad del marco de referencia se introdujeron mejoras sustanciales en la modelización y en la selección de datos. Un subconjunto de objetos del marco de referencia se utilizó para referir las posiciones estelares determinadas con el satélite astrométrico Hipparcos al ICRS.

  11. HD 208905: um sistema múltiplo de estrelas quentes

    NASA Astrophysics Data System (ADS)

    Candeias, J. P.; Daflon, S.; Cunha, K.

    2003-08-01

    Durante o survey de associações OB do disco Galáctico, foi constatada a multiplicidade do sistema HD 208905, pertencentes à associação de Cep OB2. Este objeto está classificado como uma estrela pertencente a um sistema múltiplo, com magnitude mv = 7.0 e tipo espectral B1V. De fato, os espectros de HD 208905 apresentam perfis de absorção triplicados. Dois dos perfis são bastante similares entre si, e são estreitos e bem definidos, sugerindo que as velocidades rotacionais projetadas (v sin i) das duas estrelas são baixas. Os espectros obtidos também apresentam perfis mais alargados que poderiam ser atribuídos a uma terceira componente estelar com v sin i mais alto. A análise de HD 208905 é baseada no estudo da variação da posição relativa dos perfis espectrais de acordo com a fase do sistema. Nossos dados observacionais são um conjunto de espectros de alta resolução obtidos no McDonald Observatory (Universidade do Texas, Austin), Kitt Peak National Observatory e Palomar Observatory, cobrindo o período de 10/91 até 12/95. Inicialmente, calculamos a velocidade radial de cada componente do sistema, considerando o desvio Doppler sofrido por cada estrela. As velocidades radiais medidas foram, em seguida, corrigidas para velocidades radiais heliocêntricas. O passo seguinte constituiu na determinação da periodicidade da série temporal definida pelas medidas das velocidades radiais heliocêntricas através da análise de Fourier. A nossa base de dados não permitiu definir uma solução única para o sistema HD 208905. As possíveis soluções encontradas têm períodos entre 1 e 27 dias e serão apresentadas e discutidas.

  12. Prise en Charge du Syndrome de Lyell ou Necrolyse Epidermique Toxique

    PubMed Central

    Siah, S.; Baite, A.; Bakkali, H.; Atmani, M.; Ababou, K.; Ihrai, H.

    2009-01-01

    Summary Le syndrome de Lyell ou nécrolyse épidermique toxique (NET) est une pathologie très grave des dermatoses bulleuses d'étiologie médicamenteuse. Il se caractérise par une nécrose aiguë de l'épiderme sur toute la hauteur du corps muqueux. L'aspect clinique de la NET est celui d'une brûlure étendue du deuxième degré profond. A ce tableau s'associent constamment des lésions muqueuses et une atteinte multiviscérale qui aggrave le pronostic. Nous rapportons deux cas de NET qui illustrent l'importance d'une prise en charge précoce et multidisciplinaire de ces patients atteints au sein d'un service de réanimation des brûlés, dont les fondements reposent sur l'asepsie rigoureuse, l'apport hydroélectrolytique et nutritionnel, la prévention de l'infection et son traitement par une antibiothérapie adaptée, et un nursing et des soins locaux. L'efficacité supposée des immunoglobulines intraveineuses ne repose que sur des cas isolés et il n'y a pas encore d'études randomisées. PMID:21991170

  13. The 'ouR-HOPE' approach for ethics and communication about neonatal neurological injury.

    PubMed

    Racine, Eric; Bell, Emily; Farlow, Barbara; Miller, Steven; Payot, Antoine; Rasmussen, Lisa Anne; Shevell, Michael I; Thomson, Donna; Wintermark, Pia

    2017-02-01

    Predicting neurological outcomes of neonates with acute brain injury is an essential component of shared decision-making, in order to guide the development of treatment goals and appropriate care plans. It can aid parents in imagining the child's future, and guide timely and ongoing treatment decisions, including shifting treatment goals and focusing on comfort care. However, numerous challenges have been reported with respect to evidence-based practices for prognostication such as biases about prognosis among clinicians. Additionally, the evaluation or appreciation of living with disability can differ, including the well-known disability paradox where patients self-report a good quality of life in spite of severe disability. Herein, we put forward a set of five practice principles captured in the "ouR-HOPE" approach (Reflection, Humility, Open-mindedness, Partnership, and Engagement) and related questions to encourage clinicians to self-assess their practice and engage with others in responding to these challenges. We hope that this proposal paves the way to greater discussion and attention to ethical aspects of communicating prognosis in the context of neonatal brain injury.

  14. Hong-Ou-Mandel Interference with Atomic Many-Body States

    NASA Astrophysics Data System (ADS)

    Islam, Rajibul; Lukin, Alexander; Ma, Ruichao; Preiss, Philipp; Rispoli, Matthew; Tai, M. Eric; Greiner, Markus

    2015-05-01

    Hong-Ou-Mandel (HOM) interference experiments are a powerful probe for the indistinguishability and underlying quantum statistics of particles. In the classic HOM experiment, a pair of identical photons incident on different input ports of a beamsplitter exits via the same output port. Using the precise control and readout afforded by our quantum gas microscope, we present an implementation of this classic experiment using massive bosons in a doublewell optical potential. Identical states are prepared on each site of the doublewell and by lowering the tunnel coupling between the sites for specific times, we drive a beam splitter operation between the sites. For single-atom Fock input states, we have realized a high fidelity beamsplitter operation and observed an HOM interference contrast of >90%. By generalizing to more complex initial states on the input ports, we have been able to establish HOM experiment protocols as a robust approach towards studying the indistinguishability of many-body states as well as probe interaction-induced effects. These techniques open a path towards the measurement of purity in a quantum system and entanglement entropy in many-body states.

  15. Hong-Ou-Mandel Interference Between Triggered And Heralded Single Photons From Separate Atomic Systems

    NASA Astrophysics Data System (ADS)

    Cere, Alessandro; Leong, Victor; Kaur Gulati, Gurpreet; Srivathsan, Bharath; Kosen, Sandoko; Kurtsiefer, Christian

    2015-05-01

    The realization of quantum networks and long distance quantum communication rely on the capability of generating entanglement between separated nodes. We demonstrate the compatibility of two different sources of single photons: a single atom and four-wave mixing in a cold cloud of atoms. The four-wave mixing process in a cloud of cold 87Rb generates photon pairs. The cascade level scheme used ensures the generation of heralded single photons with exponentially decaying temporal envelope. The temporal shape of the heralding photons matches the shape of photons emitted by spontaneous decay but for the shorter coherence time A single 87Rb atom is trapped in an far-off-resonance optical dipole trap and can be excited with high probability using a short (~3 ns) intense pulse of resonant light, emitting a single photon by spontaneous decay. A large numerical aperture lens collects ~4% of the total fluorescence. The heralded and the triggered photons are launched into a Houng-Ou-Mandel interferometer: a symmetrical beam-splitter with outputs connected to single photon detectors. Scanning the relative delay between the two sources we observe the HOM dip with a maximum visibility of 70 +/-4%.

  16. Hong-Ou-Mandel interference with two independent weak coherent states

    NASA Astrophysics Data System (ADS)

    Hua, Chen; Xue-Bi, An; Juan, Wu; Zhen-Qiang, Yin; Shuang, Wang; Wei, Chen; Zhen-Fu, Han

    2016-02-01

    Recently, the Hong-Ou-Mandel (HOM) interference between two independent weak coherent pulses (WCPs) has been paid much attention due to the measurement-device-independent (MDI) quantum key distribution (QKD). Using classical wave theory, articles reported before show that the visibility of this kind of HOM-type interference is ≤ 50%. In this work, we analyze this kind of interference using quantum optics, which reveals more details compared to the wave theory. Analyses confirm the maximum visibility of 50%. And we conclude that the maximum visibility of 50% comes from the two single-photon states in WCPs, without considering the noise. In the experiment, we successfully approach the visibility of 50% by using WCPs splitting from the single pico-second laser source and phase scanning. Since this kind of HOM interference is immune to slow phase fluctuations, both the realized and proposed experiment designs can provide stable ways of high-resolution optical distance detection. Project supported by the National Basic Research Program of China (Grants Nos. 2011CBA00200 and 2011CB921200), the National Natural Science Foundation of China (Grant Nos. 61201239, 61205118, 11304397, and 61475148) and the “Strategic Priority Research Program (B)” of the Chinese Academy of Sciences (Grant No. XDB01030100 and XDB01030300).

  17. Intercomparison of Groundwater Flow Monitoring Technologies at Site OU 1, Former Fort Ord, California

    SciTech Connect

    Daley, P F; Jantos, J; Pedler, W H; Mandell, W A

    2005-09-20

    This report presents an intercomparison of three groundwater flow monitoring technologies at a trichloroethylene (TCE) groundwater plume at Operational Unit 1 (OU 1) adjacent to the former Fritzsche Army Airfield at the former Fort Ord Army Base, located on Monterey Bay in northern Monterey County, California. Soil and groundwater at this site became contaminated by fuels and solvents that were burned on a portion of OU 1 called the Fire Drill Area (FDA) as part of firefighter training from 1962 and 1985. Cont Contamination is believed to be restricted to the unconfined A-aquifer, where water is reached at a depth of approximately 60 to 80 feet below the ground surface; the aquifer is from 15 to 20 feet in thickness, and is bounded below by a dense clay layer, the Salinas Valley Aquitard. Soil excavation and bioremediation were initiated at the site of fire training activities in the late 1980s. Since that time a pump-and-treat operation has been operated close to the original area of contamination, and this system has been largely successful at reducing groundwater contamination in this source area. However, a trichloroethylene (TCE) groundwater plume extends approximately 3000 ft (900 m) to the northwest away from the FDA. In this report, we have augmented flow monitoring equipment permanently installed in an earlier project (Oldenburg et al., 2002) with two additional flow monitoring devices that could be deployed in existing monitoring wells, in an effort to better understand their performance in a nearly ideal, homogeneous sand aquifer, that we expected would exhibit laminar groundwater flow owing to the site's relatively simple hydrogeology. The three flow monitoring tools were the Hydrotechnics{reg_sign} In In-Situ Permeable Flow Sensor (ISPFS), the RAS Integrated Subsurface Evaluation Hydrophysical Logging tool (HPL), and the Lawrence Livermore National Laboratory Scanning Colloidal Borescope Flow Meter (SCBFM). All three devices produce groundwater flow

  18. Sobre os sistemas de referência celeste

    NASA Astrophysics Data System (ADS)

    Poppe, P. C. R.; Martin, V. A. F.

    2003-02-01

    Apresentamos neste trabalho, algumas discussões sobre os sistemas de referência utilizados em Astronomia. Claramente, não é possível esgotar todo este assunto num único texto, mas esperamos, contudo, que o presente material possa ser apreciado nos cursos de Introdução à Astronomia, que estão cada vez mais presentes nas atuais propostas curriculares das graduações de Física. As discussões pertinentes às "Bases de Referência Celeste", serão apresentadas em um outro trabalho.

  19. 200-DV-1OU Sediment and Pore Water Analysis and Report for Samples at Borehole C8096

    SciTech Connect

    Lindberg, Michael J.

    2011-10-01

    This is an analytical data report for sediment samples received at 200-DV-1 OU. On August 30, 2011 sediment samples were received from 200-DV-1 OU Borehole C8096 for geochemical studies. The analyses for this project were performed at the 331 building located in the 300 Area of the Hanford Site. The analyses were performed according to Pacific Northwest National Laboratory (PNNL) approved procedures and/or nationally recognized test procedures. The data sets include the sample identification numbers, analytical results, estimated quantification limits (EQL), and quality control data. The preparatory and analytical quality control requirements, calibration requirements, acceptance criteria, and failure actions are defined in the on-line QA plan 'Conducting Analytical Work in Support of Regulatory Programs' (CAW). This QA plan implements the Hanford Analytical Services Quality Assurance Requirements Documents (HASQARD) for PNNL.

  20. Resurrection Symphony: "El Sistema" as Ideology in Venezuela and Los Angeles

    ERIC Educational Resources Information Center

    Fink, Robert

    2016-01-01

    The explosive growth of Venezuela's "El Sistema" is rewriting the agenda of musical education in the West. Many commentators from the world of classical music react to the spectacle of dedicated young colonial musicians playing European masterworks as a kind of "miracle," accepting "Sistema" founder José Antonio…

  1. Lifting the Veil: A Realist Critique of Sistema's Upwardly Mobile Path

    ERIC Educational Resources Information Center

    Logan, Owen

    2016-01-01

    El Sistema sits somewhere between a social project and a classical music initiative. However, its promise of delivering upward mobility has not been sufficiently examined as a structural phenomenon which dovetails with critical policy issues in taxation, educational provision, human rights, and welfare. This article argues that Sistema-style…

  2. Hatching Plans: Pedagogy and Discourse within an El Sistema-Inspired Music Program

    ERIC Educational Resources Information Center

    Dobson, Nicolas

    2016-01-01

    In this article, I draw on my experience as an instrumental tutor with a music program inspired by and explicitly linked to El Sistema, to explore new perspectives on Sistema-based pedagogy and management. Detailed ethnographic description of an orchestral session provides a first-hand account of the program's pedagogy, which I then contextualize…

  3. Struggling for Integration: Universalist and Separatist Discourses within El Sistema Sweden

    ERIC Educational Resources Information Center

    Bergman, Åsa; Lindgren, Monica; Saether, Eva

    2016-01-01

    This article focuses on the El Sistema programme, which started up in Sweden in 2010 with the objective to deal with segregation problems typical for Swedish urban areas. The purpose of the article is to examine how promoting integration through music and music education is constructed within El Sistema as a way to help children growing up in…

  4. Implementation of Enhanced Attenuation at the DOE Mound Site OU-1 Landfill: Accelerating Progress and Reducing Costs

    SciTech Connect

    Hooten, Gwendolyn; Cato, Rebecca; Looney, Brian

    2016-03-06

    At the US Department of Energy (DOE), Office of Legacy Management, Mound, Ohio, Site, chlorinated organic contaminants (cVOCs) originating from the former solid-waste landfill have impacted groundwater in Operable Unit 1 (OU-1). The baseline groundwater remedy was groundwater pump and treat (P&T). Since the source materials have been removed from the landfill, the Mound core team, which consists of DOE, US Environmental Protection Agency (US EPA), Ohio EPA, and other stakeholders, is assessing the feasibility of switching from the active P&T remedy to a passive attenuation-based remedy. Toward this end, an enhanced attenuation (EA) strategy based on the creation of structured geochemical zones was developed. This EA strategy addresses the residual areas of elevated cVOCs in soil and groundwater while minimizing the rebound of groundwater concentrations above regulatory targets (e.g., maximum contaminant levels [MCLs]) and avoiding plume expansion while the P&T system is turned off. The EA strategy has improved confidence and reduced risk on the OU-1 groundwater transition path to monitored natural attenuation (MNA). To better evaluate the EA strategy, DOE is conducting a field demonstration to evaluate the use of edible oils to enhance the natural attenuation processes. The field demonstration is designed to determine whether structured geochemical zones can be established that expedite the attenuation of cVOCs in the OU-1 groundwater. The EA approach at OU-1 was designed based on “structured geochemical zones” and relies on groundwater flow through a succession of anaerobic and aerobic zones. The anaerobic zones stimulate relatively rapid degradation of the original solvent source compounds (e.g., cVOCs such as tetrachloroethene [PCE] and trichloroethene [TCE]). The surrounding aerobic areas encourage relatively rapid degradation of daughter products (such as dichloroethene [DCE] and vinyl chloride [VC]) as well as enhanced cometabolism of TCE resulting from

  5. Lait humain provenant d’une banque de dons ou acheté en ligne?

    PubMed Central

    St-Onge, Maude; Chaudhry, Shahnaz; Koren, Gideon

    2015-01-01

    Résumé Question Une de mes patientes m’a demandé si elle pourrait se procurer du lait humain par Internet pour allaiter son nourrisson s’il le fallait. L’usage de lait humain provenant d’une banque de dons est-il plus sécuritaire que son achat en ligne? Réponse L’Organisation mondiale de la Santé et l’American Academy of Pediatrics recommandent d’utiliser des dons de lait humain comme choix à privilégier lorsque le lait maternel n’est pas disponible. Cependant, la Société canadienne de pédiatrie n’approuve pas le partage de lait humain non traité. Le lait humain entreposé dans les banques de lait diffère de celui qu’on peut se procurer par Internet en raison du processus rigoureux de sélection des donneuses, des fréquentes inspections de la qualité, des procédés de transport règlementés et du processus de pasteurisation conforme aux directives établies par l’Agence canadienne d’inspection des aliments. La plupart des échantillons achetés en ligne contiennent des bactéries à gram négatif ou comptent au total plus de 104 unités formant colonies de bactéries aérobiques par millilitre; ils renferment aussi en moyenne au décompte total plus de bactéries aérobiques, de bactéries à gram négatif, de coliformes et de Staphylococcus spp que les échantillons des banques de lait. La croissance de la plupart des espèces de bactéries est associée au nombre de jours en transit, ce qui porte à croire que les conditions de collecte, d’entreposage et de transport sont médiocres pour le lait acheté en ligne.

  6. Market memory and fat tail consequences in option pricing on the expOU stochastic volatility model

    NASA Astrophysics Data System (ADS)

    Perelló, Josep

    2007-08-01

    The expOU stochastic volatility model is capable of reproducing fairly well most important statistical properties of financial markets daily data. Among them, the presence of multiple time scales in the volatility autocorrelation is perhaps the most relevant which makes appear fat tails in the return distributions. This paper wants to go further on with the expOU model we have studied in Ref. [J. Masoliver, J. Perelló, Quant. Finance 6 (2006) 423] by exploring an aspect of practical interest. Having as a benchmark the parameters estimated from the Dow Jones daily data, we want to compute the price for the European option. This is actually done by Monte Carlo, running a large number of simulations. Our main interest is to “see” the effects of a long-range market memory from our expOU model in its subsequent European call option. We pay attention to the effects of the existence of a broad range of time scales in the volatility. We find that a richer set of time scales brings the price of the option higher. This appears in clear contrast to the presence of memory in the price itself which makes the price of the option cheaper.

  7. Estudio del sistema simbiótico AR Pavonis

    NASA Astrophysics Data System (ADS)

    Quiroga, C.; Brandi, E.; Ferrer, O.; García, L.; Barbá, R.

    Se presenta un estudio espectroscópico y polarimétrico de la binaria eclipsante AR Pavonis a partir de observaciones obtenidas con el telescopio de 2.15 m. del CASLEO (San Juan). El estudio de la naturaleza del sistema se realizó a través del análisis de algunos espectros reunidos entre los años 1990 y 1995 y de datos polarimétricos correspondientes al intervalo 1995 y 1997. El análisis espectroscópico indica que AR Pav está compuesta por una gigante roja M3.7 y una componente caliente compacta, con una temperatura mayor a 90000 K y una luminosidad del orden de 500Lsolar. A lo largo del período orbital, las variaciones observadas en flujo y en velocidades radiales, reflejan que las emisiones permitidas se forman en una región que rodea la componente caliente. El estudio de la polarización lineal de AR Pav indica que además de una componente interestelar, existe una componente intrínseca del sistema que varía temporalmente y con la longitud de onda de la luz polarizada. El distinto comportamiento del grado de polarización y del ángulo de posición observado en fases diferentes, sugiere que distintos mecanismos pueden estar actuando, dependiendo de la región de scattering observado a lo largo de la línea de la visual.

  8. Water quality assessment of highly polluted rivers in a semi-arid Mediterranean zone Oued Fez and Sebou River (Morocco)

    NASA Astrophysics Data System (ADS)

    Perrin, J. L.; Raïs, N.; Chahinian, N.; Moulin, P.; Ijjaali, M.

    2014-03-01

    Oued Fez (one of the Sebou River tributaries - Morocco) allowed us to study and quantify the effect of the lack of wastewater treatment on surface water quality in semi-arid hydrological context. The analysis is based on field data collected from June 2009 to December 2011. Concentration and load patterns of nitrogen, phosphorus and chromium (used in the processing of leather) are compared in stable hydrological conditions during low flow and high flow periods in an eight-location sampling network. The Oued Fez and the Sebou River are characterised by severe pollution downstream from the city of Fez, particularly TN (mainly NH4 and Norg), TP (mainly Ppart) and TCr. The most polluted sites are those directly under the influence of domestic and industrial waste water inputs, particularly tannery effluents. Obviously, the concentrations measured at these locations are above all environmental quality standards. Pollutant loads are very heavy in the Sebou River and can contaminate the river course for kilometres. Moreover, as the water of the Sebou River is used for the irrigation of vegetables, serious problems of public health could arise. A better understanding of contaminant dynamics and self-purifying processes in these rivers will help implement actions and steps aimed at improving water quality in the Sebou River, which is the primary water supply source in Morocco and is used for agricultural and industrials purposes as well as for drinking water.

  9. Analysis of Aquifer Response, Groundwater Flow, and PlumeEvolution at Site OU 1, Former Fort Ord, California

    SciTech Connect

    Jordan, Preston D.; Oldenburg, Curtis M.; Su, Grace W.

    2005-02-24

    This report presents a continuation from Oldenburg et al. (2002) of analysis of the hydrogeology, In-Situ Permeable Flow Sensor (ISPFS) results, aquifer response, and changes in the trichloroethylene (TCE) groundwater plume at Operational Unit 1 (OU 1) adjacent to the former Fritzsche Army Airfield at the former Fort Ord Army Base, located on Monterey Bay in northern Monterey County. Fuels and solvents were burned on a portion of OU 1 called the Fire Drill Area (FDA) during airport fire suppression training between 1962 and 1985. This activity resulted in soil and groundwater contamination in the unconfined A-aquifer. In the late 1980's, soil excavation and bioremediation were successful in remediating soil contamination at the site. Shortly thereafter, a groundwater pump, treat, and recharge system commenced operation. This system has been largely successful at remediating groundwater contamination at the head of the groundwater plume. However, a trichloroethylene (TCE) groundwater plume extends approximately 3000 ft (900 m) to the northwest away from the FDA. In the analyses presented here, we augment our prior work (Oldenburg et al., 2002) with new information including treatment-system totalizer data, recent water-level and chemistry data, and data collected from new wells to discern trends in contaminant migration and groundwater flow that may be useful for ongoing remediation efforts. Some conclusions from the prior study have been modified based on these new analyses, and these are pointed out clearly in this report.

  10. Things to Remember about El Sistema: A Response to "El Sistema--A Perspective for North American Music Educators" by Tricia Tunstall

    ERIC Educational Resources Information Center

    Lesniak, Melissa

    2013-01-01

    Melissa Lesniak, the executive director of the Greater Miami Youth Symphony, discusses how much she enjoyed reading the responses to her "El Sistema" article and appreciates the opportunity for healthy dialogue and debate. In response, she states that there are many common goals and objectives across all music education programs that can…

  11. Correlação de longo alcance em sistemas binários de raios-x usando remoção de flutuações

    NASA Astrophysics Data System (ADS)

    Pereira, M. G.; Moret, M. A.; Zebende, G. F.; Nogueira, E., Jr.

    2003-08-01

    Neste trabalho é proposta uma metodologia de analise de series temporais de fontes astrofísicas, baseada no método proposto por Peng et al. (1994) e Liu et al. (1999), o qual consiste na idéia de que uma série temporal correlacionada pode ser mapeada por um processo de busca de auto-similaridades em diversas escalas de tempo n. Removendo as eventuais tendências e integrando o sinal observado, é obtida uma medida do desvio médio quadrático das flutuações do sinal integrado F(n)~na, onde a representa o fator de escala associado com a auto-similaridade da correlação de longo alcance do sinal. Baseado nos valores obtidos de a, é possível distinguir entre os casos de sinais não-correlacionados, tipo ruído branco (a = 0,5), sinal anti-persistentes (a < 0,5) e sinal persistente (a > 0,5). Usando esta metodologia, foram analisadas 129 curvas de luz de sistemas binários de raios-X, provenientes do banco de dados públicos de observações feitas pelo instrumento All Sky Monitor, a bordo do satélite Rossi X-Ray Timing Explorer (ASM-RXTE). Foram identificadas a presença de a'0,5 em mais de 90% dos sistemas estudados, implicando em dizer que as flutuações de intensidade observadas apresentam correlação de auto-similaridade, sem entretanto, indícios de apresentarem uma escala de tempo característica das flutuações de intensidade. Sistemas onde são observadas erupções (flares), apresentam sistematicamente a > 0,5, característica esta, possivelmente associada com persistência das flutuações de densidade de disco ou taxa de acréscimo de massa. Os sistemas com curvas de luz onde nao são observadas as erupções apresentam uma distribuição normal centrada em a~0,62+/-0,10. Referências ¾ Peng, C.-K., Buldyrev, S.V., Havlin, S., Simons, M., Stanley, H.E., e Goldberg, A.L., Phys. Rev. E, (49), 1685 (1994). ¾ Liu, Y., Gopikrishnan, P., Cizeau, P., Meyer, M., Peng,C.-K., e Stanley, H.E., Phys. Rev. E, (60), 1390 (1999).

  12. Performing Hong-Ou-Mandel-type numerical experiments with repulsive condensates: The case of dark and dark-bright solitons

    NASA Astrophysics Data System (ADS)

    Sun, Zhi-Yuan; Kevrekidis, Panayotis G.; Krüger, Peter

    2016-12-01

    The Hong-Ou-Mandel experiment leads indistinguishable photons simultaneously reaching a 50:50 beam splitter to emerge on the same port through a two-photon interference. Motivated by this phenomenon, we consider numerical experiments of the same flavor for classical wave objects in the setting of repulsive condensates. We examine dark solitons interacting with a repulsive barrier, a case in which we find no significant asymmetries in the emerging waves after the collision, presumably due to their topological nature. We also consider case examples of two-component systems, where the dark solitons trap a bright structure in the second component (dark-bright solitary waves). For these, pronounced asymmetries upon collision are possible for the nontopological bright component. We also show an example of a similar phenomenology for ring dark-bright structures in two dimensions.

  13. Hong-Ou-Mandel interference mediated by the magnetic plasmon waves in a three-dimensional optical metamaterial.

    PubMed

    Wang, S M; Mu, S Y; Zhu, C; Gong, Y X; Xu, P; Liu, H; Li, T; Zhu, S N; Zhang, X

    2012-02-27

    We studied the quantum properties of magnetic plasmon waves in a three-dimensional coupled metamaterial. A Hong-Ou-Mandel dip of two-photon interference with a visibility of 86 ± 6.0% was explicitly observed, when the sample was inserted into one of the two arms of the interferometer. This meant that the quantum interference property survived in such a magnetic plasmon wave-mediated transmission process, thus testifying the magnetic plasmon waves owned a quantum nature. A full quantum model was utilized to describe our experimental results. The results showed that the metamaterials could not only steer the classical light but also the non-classical light and they might have potential application in the future quantum information.

  14. Loss-tolerant state engineering for quantum-enhanced metrology via the reverse Hong-Ou-Mandel effect.

    PubMed

    Ulanov, Alexander E; Fedorov, Ilya A; Sychev, Demid; Grangier, Philippe; Lvovsky, A I

    2016-06-21

    Highly entangled quantum states, shared by remote parties, are vital for quantum communications and metrology. Particularly promising are the N00N states-entangled N-photon wavepackets delocalized between two different locations-which outperform coherent states in measurement sensitivity. However, these states are notoriously vulnerable to losses, making them difficult to both share them between remote locations and recombine in order to exploit interference effects. Here we address this challenge by utilizing the reverse Hong-Ou-Mandel effect to prepare a high-fidelity two-photon N00N state shared between two parties connected by a lossy optical medium. We measure the prepared state by two-mode homodyne tomography, thereby demonstrating that the enhanced phase sensitivity can be exploited without recombining the two parts of the N00N state. Finally, we demonstrate the application of our method to remotely prepare superpositions of coherent states, known as Schrödinger's cat states.

  15. Loss-tolerant state engineering for quantum-enhanced metrology via the reverse Hong-Ou-Mandel effect

    NASA Astrophysics Data System (ADS)

    Ulanov, Alexander E.; Fedorov, Ilya A.; Sychev, Demid; Grangier, Philippe; Lvovsky, A. I.

    2016-06-01

    Highly entangled quantum states, shared by remote parties, are vital for quantum communications and metrology. Particularly promising are the N00N states--entangled N-photon wavepackets delocalized between two different locations--which outperform coherent states in measurement sensitivity. However, these states are notoriously vulnerable to losses, making them difficult to both share them between remote locations and recombine in order to exploit interference effects. Here we address this challenge by utilizing the reverse Hong-Ou-Mandel effect to prepare a high-fidelity two-photon N00N state shared between two parties connected by a lossy optical medium. We measure the prepared state by two-mode homodyne tomography, thereby demonstrating that the enhanced phase sensitivity can be exploited without recombining the two parts of the N00N state. Finally, we demonstrate the application of our method to remotely prepare superpositions of coherent states, known as Schrödinger's cat states.

  16. Contribution to the study of pollution of soil and water in Oued El Maleh area (Mohammedia, Morocco)

    NASA Astrophysics Data System (ADS)

    El hajjaji, Souad; Dahchour, Abdelmalek; Belhsaien, Kamal; Zouahri, Abdelmjid; Moussadek, Rachid; Douaik, Ahmed

    2016-04-01

    In Morocco, diffuse ground and surface water pollution in irrigated areas has caused an increase in the risk of water and soil quality deterioration. This has generated a health and environmental risks. The present study was carried out in the Oued El Maleh region located 65 Km to the south of Rabat on the Moroccan Atlantic coast. It covers a surface area of 310 km2 where agriculture constitutes the main activity of the population. This region is considered as a very important agricultural area, known nationally for its high potential for market gardening. This intensification has been accompanied by an excessive use of agrochemical inputs and poor control of irrigation and drainage. Consequently, salinization phenomena and deterioration of soil structure as well as water are about to create an alarming situation. In order to assess the state of pollution of waters and soil in the region, our study focuses on the determination of physicochemical parameters for the quality of water and soil. The obtained results from sampled wells and surface water show relatively higher values of nitrate and conductivity exceeding Moroccan national standards and revealing net degradation of water quality; therefore the water can be considered not suitable for human consumption and can induce a degradation of soil. The results of the studied soil show that the pH of these soils is weakly to moderately basic; they are usually non-saline with organic matter content moderately filled. Moreover, very high concentrations of nutrients (potassium, phosphorus and nitrogen) were recorded, highlighting poor management fertilizing vegetable crops in the region of Oued El Maleh.

  17. L’administration postnatale de corticoïdes pour traiter ou prévenir les affections pulmonaires chroniques chez les prématurés

    PubMed Central

    2002-01-01

    Le présent énoncé est conçu à l’intention des professionnels de la santé qui soignent des nouveau-nés et de jeunes nourrissons. Il vise à examiner les effets à court et à long terme de l’administration postnatale de corticoïdes systémiques et par inhalation pour prévenir ou traiter une affection pulmonaire chronique évolutive ou établie et à faire des recommandations quant à l’usage de corticoïdes chez les nourrissons à très faible poids de naissance. Le recours systématique à la dexaméthasone systémique pour prévenir ou traiter une affection pulmonaire chronique n’est pas recommandé chez les nourrissons à très faible poids de naissance.

  18. Stratigraphic and structural characterization of the OU-1 area at the former George Air Force Base, Adelanto, Southern California

    USGS Publications Warehouse

    Catchings, R.D.; Gandhok, G.; Goldman, M.R.

    2001-01-01

    The former George Air Force Base (GAFB), now known as the Southern California Logistics Airport (SCLA), is located in the town of Adelanto, approximately 100 km northeast of Los Angeles, California (Fig. 1). In this report, we present acquisition parameters, data, and interpretations of seismic images that were acquired in the OU-1 area of GAFB during July 1999 (Fig. 2). GAFB is scheduled for conversion to civilian use, however, during its years as an Air Force base, trichlorethylene (TCE) was apparently introduced into the subsurface as a result of spills during normal aircraft maintenance operations. To comply with congressional directives, TCE contaminant removal has been ongoing since the early-tomid 1990s. However, only a small percentage of the TCE believed to have been introduced into the subsurface has been recovered, due largely to difficulty in locating the TCE within the subsurface. Because TCE migrates within the subsurface by ground water movement, attempts to locate the TCE contaminants in the subsurface have employed an array of ground-water monitoring and extraction wells. These wells primarily sample within a shallow-depth (~40 m) aquifer system. Cores obtained from the monitoring and extraction wells indicate that the aquifer, which is composed of sand and gravel channels, is bounded by aquitards composed largely of clay and other fine-grained sediments. Based on well logs, the aquifer is about 3 to 5 m thick along the seismic profiles. A more thorough understanding of the lateral variations in the depth and thickness of the aquifer system may be a key to finding and removing the remaining TCE. However, due to its complex depositional and tectonic history, the structural and stratigraphic sequences are not easily characterized. An indication of the complex nature of the structure and stratigraphy is the appreciable variation in stratigraphic sequences observed in some monitoring wells that are only a few tens of meters apart. To better

  19. "The Feelings Have Come Home to Me." Examining Advertising Films on the Swedish Website of El Sistema

    ERIC Educational Resources Information Center

    Kuuse, Anna-Karin; Lindgren, Monica; Skåreus, Eva

    2016-01-01

    The purpose of this study is to analyze how the music educational program of El Sistema Sweden is advertised and legitimized through moving images. The films are a major part of the information on the Swedish national website of El Sistema and are supposed to contribute to the picture that the organization and its founders wish to market. The use…

  20. The planetary nebula IPHASXJ211420.0+434136 (Ou5): insights into common-envelope dynamical and chemical evolution

    NASA Astrophysics Data System (ADS)

    Corradi, R. L. M.; Rodríguez-Gil, P.; Jones, D.; García-Rojas, J.; Mampaso, A.; García-Alvarez, D.; Pursimo, T.; Eenmäe, T.; Liimets, T.; Miszalski, B.

    2014-07-01

    While analysing the images of the IPHAS (INT/WFC Photometric Hα Survey of the northern Galactic plane) survey, we noticed that the central star of the candidate planetary nebula IPHASXJ211420.0+434136 (also named Ou5) was clearly variable. This is generally considered as an indication of binarity. To confirm it, we performed a photometric monitoring of the central star, and obtained images and spectra of the nebula. The nebular spectrum confirms that IPHASXJ211420.0+434136 is a planetary nebula of moderately high excitation. It has a remarkable morphology with two nested pairs of bipolar lobes and other unusual features. The light curve of the central star reveals that it is an eclipsing binary system with an orbital period of 8.74 h. It also displays a strong irradiation effect with an amplitude of 1.5 mag. The presence of multiple bipolar outflows adds constraints to the formation of these nebulae, suggesting the occurrence of discrete ejection events during, or immediately before, the common-envelope phase. IPHASXJ211420.0+434136 also adds evidence to the hypothesis that a significant fraction of planetary nebulae with close binary central stars have a peculiar nebular chemistry and a relatively low nebular mass. This may point to low-mass, low-metallicity progenitors, with additional effects related to the binary evolution. We also suggest that these objects may be relevant to understand the abundance discrepancy problem in planetary nebulae.

  1. Geo-environmental risk in the upper valley of the Oued Sebou (Fès, Central Morocco): a preliminary approach

    NASA Astrophysics Data System (ADS)

    De Waele, J.; Di Gregorio, F.; El Wartiti, M.; Fadli, D.; Follesa, R.; Marini, A.; Melis, M. T.

    2004-06-01

    In the framework of several projects sustained by the Regional Sardinian Government Laws no. 43 (28/09/1990) and no. 19 (11/04/1996), research groups of the University of Cagliari (Sardinia, Italy) and of the University Mohamed V-Agdal of Rabat (Morocco) have started a series of preliminary geo-environmental studies in the basin of the Oued Sebou. An area of almost 1000 square km around the famous city of Fès has been studied, using satellite images and two ground surveying campaigns. These surveys aim to define the geological and structural settings, the vegetation and land use, in order to define the landscape units and to select the areas of major hydrogeological and geo-environmental risk. The satellite data used are the LANDSAT TM5 images taken on the 9th of October 1997. These images have been analysed to obtain the different bases for further thematic mapping, resulting in the geo-environmental map of the area around Fès that constitutes an up-to-date representation of the geological and environmental state of the territory and a useful instrument for further risk assessment and urban and territorial planning.

  2. Ou (Psittirostra psittacea)

    USGS Publications Warehouse

    Snetsinger, Thomas J.; Reynolds, Michelle H.; Herrmann, Christina M.

    1998-01-01

    The ‘Ö‘ü and the Läna‘i Hookbill are plump, predominantly olive green, thick-billed Hawaiian honeycreepers. The ‘Ö‘ü is now very rare and restricted to remote, high-elevation native forest, and the Läna‘i Hookbill is extinct. They are closely related species, belonging to a specialized tribe, Psittirostrini, consisting of nine historically known Hawaiian species with heavy, finchlike to parrotlike bills. Because of their taxonomic affinity and the paucity of information on the Läna‘i Hookbill, we are treating the two species in a single account.

  3. Exploración del Sistema Solar -- Una mirada hacia el futuro

    NASA Video Gallery

    ¿Piensas que ya sabemos todo acerca de nuestro sistema solar? La realidad es que apenas hemos comenzado con lo que hay para conocer. Únete a la NASA, en el envío de misiones a los confines del sist...

  4. El Sistema as a Bourgeois Social Project: Class, Gender, and Victorian Values

    ERIC Educational Resources Information Center

    Bull, Anna

    2016-01-01

    This article asks why classical music in the UK, which is consumed and practiced by the middle and upper classes, is being used as a social action program for working-class children in British music education schemes inspired by El Sistema. Through exploring the discourse of the social benefits of classical music in the late nineteenth century, a…

  5. El Sistema de Formas en Colores for Teaching Grammar in Spanish

    ERIC Educational Resources Information Center

    Nailon, James

    2010-01-01

    Sistema de formas en colores (SFC) is a symbols-based system for teaching Spanish grammatical structures and concepts within a communicative context in the elementary school. The (ACTFL) Standards for Foreign Language Learning: Preparing for the 21st Century states that, "While grammar and vocabulary are essential tools for communication, it is…

  6. Improving Middle School Quality in Poor Countries: Evidence from the Honduran "Sistema De Aprendizaje Tutorial"

    ERIC Educational Resources Information Center

    McEwan, Patrick J.; Murphy-Graham, Erin; Torres Irribarra, David; Aguilar, Claudia; Rápalo, Renán

    2015-01-01

    This article evaluates the impact and cost-effectiveness of offering an innovative middle school model--the Sistema de Aprendizaje Tutorial (SAT)--to Honduran villages instead of traditional middle schools. We identified a matched sample of villages with either type of school and collected baseline data among primary school graduates eligible to…

  7. Five Encounters with "El Sistema" International: A Venezuelan Marvel Becomes a Global Movement

    ERIC Educational Resources Information Center

    Booth, Eric; Tunstall, Tricia

    2014-01-01

    Genuine worldwide movements for social change are rare in human history. Even more rare is the phenomenon of a worldwide movement for social change through art, with teaching artists at the forefront. This article presents the evolution of such a movement now, in the global blossoming of "El Sistema," a program that seeks to change the…

  8. Another Perspective: El Sistema--A Perspective for North American Music Educators

    ERIC Educational Resources Information Center

    Tunstall, Tricia

    2013-01-01

    Herein, Tricia Tunstall presents a critique of the article by Melissa Lesniak published in the December 2012 "Music Educators Journal," and offers a new perspective on the Venezuelan youth orchestra program known as "El Sistema." The program, which began in Caracas thirty-eight years ago, is dedicated to changing the lives of…

  9. Social Responsibility and Community Development: Lessons from the Sistema de Aprendizaje Tutorial in Honduras

    ERIC Educational Resources Information Center

    Honeyman, Catherine A.

    2010-01-01

    This article extends understanding of the connections between education, social capital, and development through a mixed-methods case study of the Sistema de Aprendizaje Tutorial, or SAT, an innovative secondary-level education system. The quantitative dimension of the research used survey measures of social responsibility to compare 93 SAT…

  10. Antibody Production, Anaphylactic Signs, and T-Cell Responses Induced by Oral Sensitization With Ovalbumin in BALB/c and C3H/HeOuJ Mice

    PubMed Central

    Pablos-Tanarro, Alba; López-Expósito, Ivan; Lozano-Ojalvo, Daniel; López-Fandiño, Rosina

    2016-01-01

    Purpose Two mouse strains, BALB/c and C3H/HeOuJ, broadly used in the field of food allergy, were compared for the evaluation of the allergenic potential of ovalbumin (OVA). Methods Sensitization was made by administering 2 different OVA doses (1 and 5 mg), with cholera toxin as Th2-polarizing adjuvant. Antibody levels, severity of anaphylaxis, and Th1 and Th2 responses induced by the allergen were assessed. In addition, because the mice selected had functional toll-like receptor 4, the influence of contamination with lipopolysaccharide (LPS) on the immunostimulating capacity of OVA on spleen cells was also evaluated. Results Both strains exhibited similar susceptibility to OVA sensitization. The 2 protein doses generated similar OVA-specific IgE and IgG1 levels in both strains, whereas C3H/HeOuJ mice produced significantly more IgG2a. Oral challenge provoked more severe manifestations in C3H/HeOuJ mice as indicated by the drop in body temperature and the severity of the anaphylactic scores. Stimulation of splenocytes with OVA led to significantly higher levels of Th2 and Th1 cytokines in BALB/c, and these were less affected by protein contamination with LPS. Conclusions The antibody and cytokine levels induced by OVA in BALB/c mice and the observation that BALB/c spleen cell cultures were more resistant than those of C3H/HeOuJ mice to the stimulus of LPS make this strain prone to exhibit Th2-mediated food allergic reactions and very adequate for the study of the features of OVA that make it allergenic. PMID:26922934

  11. Le syndrome du canal d’Alcock ou névralgie pudendale : un diagnostic à ne pas méconnaître

    PubMed Central

    Ziouziou, Imad; Bennani, Hassan; Zizi, Mohamed; Karmouni, Tarik; Khader, Khalid El; Koutani, Abdellatif; Andaloussi, Ahmed Iben Attya

    2013-01-01

    Résumé Le syndrome du canal d’Alcock – ou névralgie pudendale – est lié à la compression chronique du nerf pudendal dans la fossette ischiorectale ou au niveau du ligament sacroépineux. Le diagnostic du syndrome d’Alcock est surtout clinique. Les examens complémentaires sont dominés par les explorations électrophysiologiques et le test de bloc anesthésique. Le diagnostic repose sur des critères bien précis, soit les critères de Nantes. La prise en charge doit être globale, comprenant un traitement médicamenteux, des infiltrations, des techniques de neuromodulation, et dans les cas graves ou résistants, un traitement chirurgical qui consiste à libérer le nerf pudendal. Les névralgies pudendales peuvent être rencontrées après traitement d’une incontinence urinaire d’effort par bande-lettes sous-urétrales (TVT). Ce syndrome motive des consultations en urologie, car la douleur intéresse le territoire du périnée et des organes génitaux. Des signes urinaires peuvent aussi accompagner cette douleur. Il est donc judicieux de connaître cette pathologie. PMID:23914265

  12. L’administration postnatale de corticoïdes pour traiter ou prévenir la maladie pulmonaire chronique chez les prématurés

    PubMed Central

    Jefferies, Ann L

    2012-01-01

    RÉSUMÉ Les corticoïdes sont administrés pendant la période postnatale pour prévenir et traiter la maladie pulmonaire chronique néonatale (MPC) (qu’on appelle aussi dysplasie bronchopulmonaire), une cause importante de mortalité et de morbidité chez les nourrissons prématurés. Puisque l’administration de dexaméthasone ou d’hydrocortisone pendant les sept premiers jours de vie s’associe à un plus grand risque d’infirmité motrice cérébrale, il n’est pas recommandé d’amorcer rapidement une corticothérapie pour prévenir la MPC pendant la période postnatale. Après sept jours de vie, il a été établi que la dexaméthasone réduit le taux de MPC à 36 semaines d’âge postmenstruel et a moins de répercussions sur les issues neurodéveloppementales. Aucun essai n’a évalué si les bienfaits des corticoïdes sont supérieurs à leurs effets indésirables chez les nourrissons à haut risque de MPC ou atteints d’une grave MPC. Il n’est pas recommandé d’administrer systématiquement de la dexaméthasone à tous les enfants sous respirateur, mais les cliniciens peuvent envisager un court traitement à l’aide de faibles doses de dexaméthasone à des nourrissons sélectionnés à haut risque de MPC ou atteints d’une grave MPC. Aucune donnée probante n’indique que l’hydrocortisone est une solution efficace ou sécuritaire pour remplacer la dexaméthasone, et peu de données probantes appuient l’utilisation systématique de corticoïdes en aérosol dans le cadre de la prévention ou du traitement. On peut envisager la corticothérapie en aérosol pour remplacer la dexaméthasone dans le traitement de nourrissons sélectionnés atteints d’une grave MPC. La présente révision remplace le document de principes publié conjointement avec l’American Academy of Pediatrics en 2002.

  13. Sistema Planeta-Satélite. Simulación orbital y potenciales gravitatorios

    NASA Astrophysics Data System (ADS)

    Medina, C.; Carrillo, M.

    Se presenta un programa (desarrollado en Quick Basic 4.5) que simula, en tres dimensiones, el movimiento orbital de un satélite (o luna) alrededor de un planeta, al tiempo que calcula y grafica, en un plano, el potencial gravitatorio del sistema en función de la distancia al planeta. Para la simulación orbital, se emplea la matriz de transformación entre el sistema del planeta y el plano orbital. Para el cálculo y graficación del potencial se aplica un desarrollo en serie hasta el segundo orden, que da cuenta del efecto de achatamiento de los polos, en caso de que éste exista. Las longitudes de los ejes del planeta, la masa de éste y del satélite, sus tamaños aparentes, y los parámetros orbitales son introducidos por el usuario.

  14. Discos de acresção em sistemas Be-X

    NASA Astrophysics Data System (ADS)

    Lopes de Oliveira, R.; Janot-Pacheco, E.

    2003-08-01

    Alguns fenômenos de outbursts em Be-X sugerem a existência, mesmo que temporária, de um disco de acresção quando da passagem do objeto compacto pelo periastro orbital. Neste trabalho avaliamos a possibilidade de formação do disco de acresção em sistemas Be+estrela de neutrons e Be+anã branca, e a influência da excentricidade orbital na ocorrência deste fenômeno. Utilizamos a expressão analítica para o momento angular específico da matéria constituinte de um meio em expansão lenta, como é o caso do disco circunstelar das estrelas Be, proposta por Wang(1981), sob a condição básica de que o raio de circularização deva ser maior do que o raio de Alfvén. Concluímos que existe um limite para o período orbital do sistema acima do qual não é possível a formação do disco de acresção, e que este valor aumenta para sistemas com excentricidade orbital maior.

  15. Total petroleum systems of the Trias/Ghadames Province, Algeria, Tunisia, and Libya; the Tanezzuft-Oued Mya, Tanezzuft-Melrhir, and Tanezzuft-Ghadames

    USGS Publications Warehouse

    Klett, T.R.

    2000-01-01

    Undiscovered conventional oil and gas resources were assessed within total petroleum systems of the Trias/Ghadames Province (2054) as part of the U.S. Geological Survey World Petroleum Assessment 2000. The Trias/Ghadames Province is in eastern Algeria, southern Tunisia, and westernmost Libya. The province and its total petroleum systems generally coincide with the Triassic Basin. The province includes the Oued Mya Basin, Melrhir Basin, and Ghadames (Berkine) Basin. Although several total petroleum systems may exist within each of these basins, only three ?composite? total petroleum systems were identified. Each total petroleum system occurs in a separate basin, and each comprises a single assessment unit. The main source rocks are the Silurian Tanezzuft Formation (or lateral equivalents) and Middle to Upper Devonian mudstone. Maturation history and the major migration pathways from source to reservoir are unique to each basin. The total petroleum systems were named after the oldest major source rock and the basin in which it resides. The estimated means of the undiscovered conventional petroleum volumes in total petroleum systems of the Trias/Ghadames Province are as follows: [MMBO, million barrels of oil; BCFG, billion cubic feet of gas; MMBNGL, million barrels of natural gas liquids] Total Petroleum System MMBO BCFG MMBNGL Tanezzuft-Oued Mya 830 2,341 110 Tanezzuft-Melrhir 1,875 4,887 269 Tanezzuft-Ghadames 4,461 12,035 908

  16. Calcification and silicification: fossilization potential of cyanobacteria from stromatolites of Niuafo'ou's Caldera Lakes (Tonga) and implications for the early fossil record.

    PubMed

    Kremer, Barbara; Kazmierczak, Józef; Lukomska-Kowalczyk, Maja; Kempe, Stephan

    2012-06-01

    Calcification and silicification processes of cyanobacterial mats that form stromatolites in two caldera lakes of Niuafo'ou Island (Vai Lahi and Vai Si'i) were evaluated, and their importance as analogues for interpreting the early fossil record are discussed. It has been shown that the potential for morphological preservation of Niuafo'ou cyanobacteria is highly dependent on the timing and type of mineral phase involved in the fossilization process. Four main modes of mineralization of cyanobacteria organic parts have been recognized: (i) primary early postmortem calcification by aragonite nanograins that transform quickly into larger needle-like crystals and almost totally destroy the cellular structures, (ii) primary early postmortem silicification of almost intact cyanobacterial cells that leave a record of spectacularly well-preserved cellular structures, (iii) replacement by silica of primary aragonite that has already recrystallized and obliterated the cellular structures, (iv) occasional replacement of primary aragonite precipitated in the mucopolysaccharide sheaths and extracellular polymeric substances by Al-Mg-Fe silicates. These observations suggest that the extremely scarce earliest fossil record may, in part, be the result of (a) secondary replacement by silica of primary carbonate minerals (aragonite, calcite, siderite), which, due to recrystallization, had already annihilated the cellular morphology of the mineralized microbiota or (b) relatively late primary silicification of already highly degraded and no longer morphologically identifiable microbial remains.

  17. Sistemas Correctores de Campo Para EL Telescopio Ritchey-Chretien UNAM212

    NASA Astrophysics Data System (ADS)

    Cobos, F. J.; Galan, M. J.

    1987-05-01

    El telescopio UNAM2l2 fue inaugurado hace siete años y concebido para trabajar en las razones focales: f/7.5, F/13.5, F/27 y F/98. El diseño Ritchey-Chretién corresponde a la razón focal F/7.5 y el foco primario (F/2.286) no se consideró como utilizable para fotografía directa. En el Instituto de Astronomía de la UNAM, se diseñó y construyó un sistema corrector de campo para la razón focal F/7.5, que actualmente está en funcionamiento. Dentro de un programa de colaboración en diseflo y evaluación de sistemas ópticos, entre el Instituto de Astrofísica de Canarias y el Instituto de Astronomía de la UNAM, decidimos intentar el diseño de una correctora de campo para el foco primario del tȩlescopio UNAM212 bajo la consideración de que no son insalvables los problemas que implicaría su instalación y de que es muy posible que, en un futuro relativamente cercano, podamom tener un detector bidimenmional tipo Mepsicrón cuya área sensible haga tentadora la idea de construir la cámara directa para foco primario

  18. La prévention et le traitement des infections bactériennes chez les enfants aspléniques ou hypospléniques

    PubMed Central

    1999-01-01

    L’asplénie, qu’elle soit fonctionnelle ou anatomique, s’associe à un accroissement du risque d’infection potentiellement fatale ou constituant un danger de septicémie postsplénectomie (SPS). En raison du risque accru de bactériémie par des bactéries encapsulées chez les enfants aspléniques, la vaccination visant à prévenir une infection au Streptococcus pneumoniae, à l’Haemophilus influenzae de type b (Hib) et au Neiserria meningitidis est recommandée. Malgré la prévalence croissante de S pneumoniae pénicillinorésistant, on recommande aussi l’usage de pénicilline prophylactique chez les enfants aspléniques de moins de cinq ans, et pendant au moins un an après une splénectomie. La poursuite de la prophylaxie antibiotique après cette période dépend de la situation clinique de chaque enfant et de la prévalence de S pneumoniae pénicillinorésistant au sein de la collectivité. Lorsque des enfants aspléniques font de la fièvre ou présentent des symptômes non spécifiques, ils devraient faire l’objet d’une évaluation immédiate. Si on présume la présence de septicémie bactérienne, il faut procéder à une analyse du sang et des autres liquides organiques pertinents et entreprendre sur-le-champ une antibiothérapie à large spectre par voie parentérale, laquelle doit agir également contre les souches de S pneumoniae présentes dans la collectivité. Chez les enfants aspléniques souffrant d’une septicémie foudroyante à S pneumoniae, le taux de mortalité est élevé, malgré l’utilisation rapide d’une antibiothérapie convenable, d’où l’importance des mesures préventives.

  19. Determination of heavy metals in suspended waste water collected from Oued El Harrach Algiers River by Energy Dispersive X-Ray Fluorescence

    NASA Astrophysics Data System (ADS)

    Ouziane, S.; Amokrane, A.; Toumert, I.

    2013-12-01

    A preliminary study of the atmospheric pollution in the centre of Algiers is one of the important fields of applications in the environmental science. Nowadays, we need to evaluate the level of the contamination which has an unfavourable effect on physicochemical properties of soils and plants and namely also on human health. In the present work, water samples collected from Oued El-Harrach Algiers River, have been filtered in 0.45 μm Millipore filters to be analysed by Energy Dispersive X-Ray Fluorescence technique using 109Cd radioisotope source. Concentrations of the toxic elements like heavy metals are determined and compared with the published ones values by Yoshida [1] and those obtained using PIXE and NAA techniques [6].

  20. Le fibromatosis colli ou torticolis congénital: son diagnostic et sa prise en charge à propos de deux cas

    PubMed Central

    Tchaou, Mazamaesso; Pegbessou, Plaodezina Essobozou; Sonhaye, Lantam; Ahouanssou, Patricia Yékpé; Amadou, Abdoulatif; Kolou, Beresa; Kama, Lidi Bessi; Garba, Nouhou Mahamadou; Koussema, Lama Kegdigoma Agoda; N'dakéna, Koffi

    2015-01-01

    Le fibromatosis colli (FC) est pseudotumeur rare du muscle sterno-cléido-mastoïdien (SCM), à l'origine d'un torticolis dit congénital chez le nouveau-né ou le nourrisson. Le mécanisme étio-pathogénique de sa survenue est sujet à controverse. Son diagnostic fait appel à l’échographie qui permet de mettre en évidence un épaississement caractéristique du muscle. Nous rapportons deux cas diagnostiqués par l’échographie avec pour un cas une notion de malposition intra-utérine et pour l'autre cas une absence totale de malposition et de traumatisme obstétrical qui pourtant est évoqué comme élément du mécanisme de survenue du FC. PMID:26834927

  1. What Feynman could not yet use: the generalised Hong-Ou-Mandel experiment to improve the QED explanation of the Pauli exclusion principle

    NASA Astrophysics Data System (ADS)

    Malgieri, Massimiliano; Tenni, Antonio; Onorato, Pasquale; De Ambrosis, Anna

    2016-09-01

    In this paper we present a reasoning line for introducing the Pauli exclusion principle in the context of an introductory course on quantum theory based on the sum over paths approach. We start from the argument originally introduced by Feynman in ‘QED: The Strange Theory of Light and Matter’ and improve it by discussing with students modern experimental evidence from the famous Hong-Ou-Mandel experiment with indistinguishable photons and its generalised version using electrons. The experiments can be analysed in a rather simple way using Feynman’s method of ‘arrow multiplication’ for treating processes involving more than one quantum object. The approach described is especially relevant in the formation of high school physics teachers to the basics of modern physics.

  2. Sur les anomalies structurales de l'anticlinal de l'oued Bahloul de Tunisie : héritage tectonique et plissement cisaillant de couverture

    NASA Astrophysics Data System (ADS)

    Saadi, Ahmed; Boukadi, Noureddine; Gaaya, Ali

    2006-07-01

    The Oued Bahloul structure exists in the central Atlas of Tunisia. This structure is oriented N70 and it shows a very particular geometry characterized by: ( i) an important disharmony between the northern and the southern flanks; ( ii) a dissymmetry between the east and the west parts of the structure; ( iii) several gaps and progressive unconformities present in the Cretaceous and Eocene series. Three major tectonic directions characterize this structure: ( i) the N120 appears in the western part of the anticline; ( ii) some north-south faults distinguish the oriental part; ( iii) the strike fault, which is confirmed by seismic data, affects the central part of this anticline. To cite this article: A. Saadi et al., C. R. Geoscience 338 (2006).

  3. Response of Nereis diversicolor (Polychaeta, Nereidae) populations to reduced wastewater discharge in the polluted estuary of Oued Souss, Bay of Agadir, Morocco

    NASA Astrophysics Data System (ADS)

    Ait Alla, A.; Gillet, P.; Deutsch, B.; Moukrim, A.; Bergayou, H.

    2006-12-01

    Field investigations on the population dynamics of Nereis diversicolor were carried out from January 2002 to December 2003 in the estuary of Oued Souss (southwestern Morocco) to determine the changes caused by setting up of a domestic and industrial wastewater purification plant (M'zar) before and after by the end of wastewater discharges in November 2002 on the structure of the ecosystem. Samples of N. diversicolor were collected monthly in the intertidal zone at low tide before (during 2002) and after (during 2003) the end of wastewater discharges. Separation of cohorts using the Algorithm EM method (McLachlan, G.J., Krishnan, T., 1997. The EM algorithm and extensions. Wiley Series in Probability and Statistics. Wiley, New York, 274 pp.) allowed determination of the growth rate (mm day -1) by cohort and the annual production. The data showed significant differences between populations of Nereis diversicolor before and after the end of wastewater discharges. During the wastewater discharge period (2002), the population had a mean annual density of 1992 ind m -2, a mean annual biomass of 75.52 g DW m -2 and an annual secondary production of 141.3 g DW m -2 with a P/ B ratio of 1.87. After the end of discharges (2003), density, biomass and secondary production decreased significantly. The annual averages for these parameters were 740 ind m -2, 14.16 g DW m -2 and 23.83 g DW m -2, respectively, with a P/ B ratio of 1.68. The important decrease observed in density, biomass and secondary production of Nereis diversicolor may be attributed (a) to the environmental changes observed after the end of wastewater discharges in the estuary of Oued Souss, namely the increase of salinity and the decrease of organic matter content, and (b) to the migration of this species towards other areas.

  4. Ore deposits and epithermal evidences associated with intra-magmatic faults at Aïn El Araâr-Oued Belif ring structure (NW of Tunisia)

    NASA Astrophysics Data System (ADS)

    Aissa, Wiem Ben; Aissa, Lassaâd Ben; Amara, Abdesslem Ben Haj; Tlig, Said; Alouani, Rabah

    2017-03-01

    Hydrothermal ore deposits at Aïn El Araâr-Oued Belif location are classified as epithermal deposits type. The ore bodies are hosted by upper Turonian (8-9 M.y) volcanic rhyodacitic complex. Polymetallic sulfide orebodies are mainly concentrated within intra-magmatic faults. Petrographic, XRD, and TEM-STEM investigations revealed that ore minerals are essentially, arsenopyrite, pyrite, chalcopyrite, pyrrhotite, hematite, goethite and magnetite with Au, Ag and Pt trace metals. Gangue minerals are mainly adularia, quartz, sericite, alunite, tridymite, chlorite, phlogopite and smectite. Epithermal alteration is well zoned with four successive characteristic zones: (1) zone of quartz-adularia-sericite and rare alunite; (2) zone of kaolinite and plagioclase albitization; (3) intermediate zone of illite-sericite; (4) sapropelic alteration type zone of chlorite-smectite and rare illite. This can be interpreted as a telescoping of two different acidity epithermal phases; low sulfidation (adularia-sericite) and high sulfidation (quartz-alunite), separated in time or due to a gradual increase of fluids acidity and oxicity within the same mineralization phase. Brecciated macroscopic facies with fragments hosting quartz-adularia-sericite minerals (low-sulfidation phase) without alunite, support the last hypothesis. Geodynamic context and mineral alteration patterns are closely similar to those of Maria Josefa gold mine at SE of Spain which exhibit a volcanic-hosted epithermal ore deposit in a similar vein system, within rhyolitic ignimbrites, altered to an argillic assemblage (illite-sericite abundant and subordinate kaolinite) that grades outwards into propylitic alteration (Sanger-von Oepen et al. (1990)). Mineralogical and lithologic study undertaken in the volcanic host rock at Aïn El Araâr-Oued Belif reveals a typical epithermal low-sulfidation and high-sulfidation ore deposits with dominance of low-sulfidation. Host rocks in these systems range from silicic to

  5. Slug Test Characterization Results for Multi-Test/Depth Intervals Conducted During the Drilling of CERCLA Operable Unit OU UP-1 Wells 299-W19-48, 699-30-66, and 699-36-70B

    SciTech Connect

    Spane, Frank A.; Newcomer, Darrell R.

    2010-06-15

    This report presents test descriptions and analysis results for multiple, stress-level slug tests that were performed at selected test/depth intervals within three Operable Unit (OU) UP-1 wells: 299-W19-48 (C4300/Well K), 699-30-66 (C4298/Well R), and 699-36-70B (C4299/Well P). These wells are located within, adjacent to, and to the southeast of the Hanford Site 200-West Area. The test intervals were characterized as the individual boreholes were advanced to their final drill depths. The primary objective of the hydrologic tests was to provide information pertaining to the areal variability and vertical distribution of hydraulic conductivity with depth at these locations within the OU UP-1 area. This type of characterization information is important for predicting/simulating contaminant migration (i.e., numerical flow/transport modeling) and designing proper monitor well strategies for OU and Waste Management Area locations.

  6. Slug Test Characterization Results for Multi-Test/Depth Intervals Conducted During the Drilling of CERCLA Operable Unit OU ZP-1 Wells 299-W11-43, 299-W15-50, and 299-W18-16

    SciTech Connect

    Spane, Frank A.; Newcomer, Darrell R.

    2010-06-21

    The following report presents test descriptions and analysis results for multiple, stress level slug tests that were performed at selected test/depth intervals within three Operable Unit (OU) ZP-1 wells: 299-W11-43 (C4694/Well H), 299-W15-50 (C4302/Well E), and 299-W18-16 (C4303/Well D). These wells are located within south-central region of the Hanford Site 200-West Area (Figure 1.1). The test intervals were characterized as the individual boreholes were advanced to their final drill depths. The primary objective of the hydrologic tests was to provide information pertaining to the areal variability and vertical distribution of hydraulic conductivity with depth at these locations within the OU ZP-1 area. This type of characterization information is important for predicting/simulating contaminant migration (i.e., numerical flow/transport modeling) and designing proper monitor well strategies for OU and Waste Management Area locations.

  7. A reference region for the Ordovician-Silurian boundary: the Oued In Djerane, Algerian SaharaUne région de référence pour la limite Ordovicien-Silurien : l'Oued In Djerane, Sahara algérien

    NASA Astrophysics Data System (ADS)

    Legrand, Philippe

    2000-01-01

    The melting chronology of the Latest Ordovician inlandsis takes on a particular importance in northern Gondwana. A continuous sequence of Diplograptid range zones has been defined from outcrops in the Oued In Djerane, but its comparison with the sequence observed in the stratotype of the Silurian-Ordovician boundary is problematic because of the endemic character of the Saharan species. Moreover, some difficulties are linked to the definition of the Ordovician-Silurian boundary, which, in the Algerian Sahara, probably lies in the Pseudorthograptus (?) kiliani zone. A definite regional diachronism in the melting of the ice-cap has also been confirmed.

  8. Détention provisoire des jeunes femmes accusées d'avortement clandestin ou d'infanticide au Sénégal

    PubMed Central

    Soumah, Mohamed Maniboliot; Pemba, Liliane Flore

    2012-01-01

    Introduction L'activité sexuelle chez les jeunes les expose à un accroissement du risque de contracter des grossesses non désirées. Le recours à l'avortement clandestin avec son corollaire de complications peut entrainer le décès de la jeune femme. Avortement et infanticide sont interdits et sanctionnés par la loi sénégalaise. Comment ces jeunes femmes vivent-elles leur détention? Existe-il des alternatives à la détention pour éviter leur désocialisation? Méthodes Cette étude rétrospective portait sur la maison d'arrêt des femmes de Dakar située à Liberté 6, un quartier de Dakar. Nous avons procédé à des entretiens avec des femmes détenues à la maison d'arrêt des femmes de Dakar et suspectées d'infanticide ou d'avortement clandestin. Résultats Les femmes de notre échantillon ont une moyenne d’âge inférieure à 25 ans avec parmi elles une fille mineure de 16 ans. Nous avons trouvé 18,51% de femmes suspectées d'infanticide ou d'avortement. Dans notre étude 50% des femmes sont originaires de la périphérie et de la banlieue de Dakar et presque 44% proviennent des autres régions du pays. La durée moyenne de détention provisoire est de neuf mois. Conclusion Malgré leur qualification distincte dans le code pénal: l'infanticide est un crime et l'avortement un délit, les femmes suspectées d'avoir commis ces actes sont soumises à de longues détentions préventives. PMID:22937189

  9. Fiabilité des structures mécaniques adaptatives: effet de la panne des actionneurs ou des capteurs sur la stabilité

    NASA Astrophysics Data System (ADS)

    Fall, H.; Charon, W.; Kouta, R.

    2002-12-01

    Ces dernières décennies, des activités significatives dans le monde étaient dirigées autour du contrôle actif. Le but de ces recherches était essentiellement d'améliorer les performances, la fiabilité et la sécurité des systèmes. Notamment dans le cas des structures soumises à des vibrations aléatoires. D'importants travaux ont été consacré à l'utilisation des “matériaux intelligents” comme capteurs et actionneurs. Cette article propose l'analyse de la fiabilité des systèmes mécaniques en étudiant les pannes des actionneurs ou des capteurs. L'effet de ces pannes sur la stabilité et la performance du système y est démontré. Les méthodologies de conception y sont rappelées. Des exemples numériques sont fournis à travers le contrôle d'un panneau sous chargement dynamique pour illustrer la méthode proposée.

  10. Coupling of spin and orbital degrees of freedom in tunable Hong-Ou-Mandel interference involving photons in hybrid spin-orbit modes

    NASA Astrophysics Data System (ADS)

    Leary, Cody C.; Lankford, Maggie; Sundarraman, Deepika

    2015-05-01

    We investigate the connection between biphoton states involving photons in product modes of their spin and orbital degrees of freedom and those involving photons in hybrid spin-orbit modes, as mediated by Hong-Ou-Mandel interference (HOMI) in an asymmetric Mach-Zehnder interferometer. We predict that two input photons in balanced superposition states of both their spin and orbital degrees of freedom will exhibit HOMI while undergoing a simultaneous mode conversion from product spin-orbit input modes to hybrid output modes bearing orbital angular momentum. These hybrid outputs contain a spatially varying polarization structure which may be controllably rotated about the photonic beam axis by varying the relative phase between the vertical and horizontal components of each input photon's polarization. Additionally, a type of coupling of the spin and orbital degrees of freedom is exhibited in this system: the transverse spatial profile of the output photons may be continuously manipulated by tuning the polarization parameters of the input photons, in such a way that the HOMI between the photons remains stable. An interesting corollary to this work is the possibility of demonstrating in a simple experimental system that HOMI may occur between distinguishable input modes.

  11. Soil Organic Carbon Pool and Its Chemical Composition in Phyllostachy pubescens Forests at Two Altitudes in Jian-ou City, China

    PubMed Central

    Ji, Haibao; Zhuang, Shunyao; Zhu, Zhaoliang; Zhong, Zheke

    2015-01-01

    Phyllostachys pubescens forests play an important role in soil organic carbon (SOC) sequestration in terrestrial ecosystems. However, the estimation and mechanism of SOC sequestration by P. pubescens forests remain unclear. In this study, the effect of P. pubescens forest distribution with elevation was investigated at two altitude sites in Jian-ou City, Southeast China. SOC storage was estimated and its chemical composition was obtained via 13C-nuclear magnetic resonance (NMR), chemical classification, and spectral analysis. Results showed that the SOC contents and stocks were significantly higher at the high-altitude site than at the low-altitude site in the entire soil profile (0–60 cm). The C contents of the three combined humus forms exhibited similar responses to the elevation change, and all of these forms were higher at the high-altitude site than at the low-altitude site regardless of soil layer. However, the proportions of the three combined humus C showed no significant differences between the two altitudes. The results of 13C-NMR showed that the SOC chemical composition did not significantly vary with elevation as well. This finding was consistent with the E465/E665 of the loosely combined humus. Overall, the results suggested that altitude should be considered during regional SOC estimation and that altitude affected the quantity rather than the quality of the SOC under the same P. pubescens vegetation. PMID:26716688

  12. Soil Organic Carbon Pool and Its Chemical Composition in Phyllostachy pubescens Forests at Two Altitudes in Jian-ou City, China.

    PubMed

    Ji, Haibao; Zhuang, Shunyao; Zhu, Zhaoliang; Zhong, Zheke

    2015-01-01

    Phyllostachys pubescens forests play an important role in soil organic carbon (SOC) sequestration in terrestrial ecosystems. However, the estimation and mechanism of SOC sequestration by P. pubescens forests remain unclear. In this study, the effect of P. pubescens forest distribution with elevation was investigated at two altitude sites in Jian-ou City, Southeast China. SOC storage was estimated and its chemical composition was obtained via 13C-nuclear magnetic resonance (NMR), chemical classification, and spectral analysis. Results showed that the SOC contents and stocks were significantly higher at the high-altitude site than at the low-altitude site in the entire soil profile (0-60 cm). The C contents of the three combined humus forms exhibited similar responses to the elevation change, and all of these forms were higher at the high-altitude site than at the low-altitude site regardless of soil layer. However, the proportions of the three combined humus C showed no significant differences between the two altitudes. The results of 13C-NMR showed that the SOC chemical composition did not significantly vary with elevation as well. This finding was consistent with the E465/E665 of the loosely combined humus. Overall, the results suggested that altitude should be considered during regional SOC estimation and that altitude affected the quantity rather than the quality of the SOC under the same P. pubescens vegetation.

  13. Improvement and Comparative Assessment of a New Hydrological Modelling Approach for the Ouémé River Basin (Bénin), West Africa

    NASA Astrophysics Data System (ADS)

    GABA, C. O. U.

    2015-12-01

    Assessing water resources is still an important issue especially in the context of climatic changes. Although numerous hydrological models exist, new approaches are still under investigation. In this context, we propose a new modelling approach based on the Physics Principle of Least Action. A first version of a Least Action based model, in its deterministic version has already given very good results on simulating the Bétérou catchment in the Ouémé basin, Benin. The paper presents new hypotheses to go further in the model development with a view of widening its application. The improved version of the model MODYPMA was applied on 22 subcatchments in Africa, in Bénin, Côte d'Ivoire, Ethiopia; in Europe, and in the USA. Its performance was compared to two well known lumped conceptual models, the GR4J and HBV models. The model could be successfully calibrated and validated; it shows a good performance for a range of scales but a limited applicability to catchments smaller than 500 km2 . The analysis revealed that the three models have similar performance and timing errors. The parameter uncertainty was analysed using the GLUE methodology. It is concluded that model uncertainty is higher during high flows and that uncertainty analysis should include the uncertainty of the discharge data. Finally, some aspects that further research must address are brought out.

  14. Formes hémorragiques de Dengue observées dans le service des maladies infectieuses du CHU Yalgado Ouédraogo, Burkina Faso

    PubMed Central

    Mamoudou, Savadogo; Boushab, Boushab Mohamed

    2016-01-01

    La dengue est une arbovirose ré émergente dans les pays tropicaux. Sa forme hémorragique peut s'accompagner d'une défaillance circulatoire pouvant conduire à un choc hypovolémique, souvent fatal. Nous rapportons une série de trois cas de formes hémorragiques de dengue observées dans le service des maladies infectieuses du CHU Yalgado Ouédraogo de Ouagadougou dont l'objectif est de décrire les caractéristiques épidémiologiques cliniques et évolutives. Les cas étaient des jeunes de sexe féminin dont l’âge variait entre 27 ans et 43 ans, résidant dans la ville de Ouagadougou. Malgré de multiples transfusions de concentrées plaquettaires et un traitement symptomatique, nous déplorons un cas de décès. Le développement d'antiviraux et la mise au point de nouveaux vaccins constituent une lueur d'espoir pour prévenir la létalité due à cette maladie. PMID:27303584

  15. From the model of El Sistema in Venezuela to current applications: learning and integration through collective music education.

    PubMed

    Majno, Maria

    2012-04-01

    Over the last years, El Sistema--the Venezuelan project started in 1975 and now acknowledged worldwide as the most significant example of collective music education--has inspired a profusion of remarkable initiatives on all continents. From the original impulse by founder José Antonio Abreu, strong social principles of integration are combined with specific musical approaches to achieve individual empowerment as a large-scale alternative to endemic juvenile crime, counteracting the risk factors of social unease, serving as a stimulating example toward emancipation, and providing professional opportunities to the talented. Such a network, in turn, proves to be a powerful instrument of cultural progress: the tenets of "Sistema" become shared values able to foster development, reaching into issues of disability and rehabilitation. This paper presents continuities and contrasts in various ramifications of such a successful trend and outlines perspectives for further impact of this powerful transformational agent.

  16. Estudo e aplicação do código de desembaraçamento espectral - Korel - em sistemas triplos

    NASA Astrophysics Data System (ADS)

    Torres, K. B. V.; Vaz, L. P. R.

    2003-08-01

    O código KOREL é uma ferramenta adicional eficiente para a determinação simultânea de parâmetros orbitais espectroscópicos para o desembaraço de espectros individuais de sistemas estelares com até cinco componentes. Estudos já realizados (Torres,KBV,2002, Dissertação de Mestrado DF-ICEx-UFMG) mostram as limitações, aplicabilidade e eficiência do código para sistemas com duas componentes. Apresentamos, neste trabalho, a continuação dos estudos para sistemas com três componentes (sistemas hierárquicos), utilizando espectros sintéticos "gabaritos" de estrelas individuais em órbitas cujos parâmetros são conhecidos "a priori". Geramos os espectros compostos e verificamos como o código reproduz os parâmetros orbitais e espectros individuais em diversas situações físicas. É apresentado, ainda, uma discussão da aplicabilidade do código em sistemas reais como RV Crateris (Machado,ACM,1997, Dissertação de Mestrado DF-ICEx-UFMG), um sistema triplo cujas componentes eclipsantes estão, provavelmente, ainda na fase pré-sequência principal.

  17. Comparative study of microflora in Rhizospheric soils of Argania spinosa and Acacia raddiana of the arid zone from Oued El Ma (Tindouf)

    NASA Astrophysics Data System (ADS)

    Tissouras, Fatiha; Habib, Semira; Missoum, Malika; Louacini, Braim Kamel

    2016-04-01

    Desert soils occupy a large area in Algeria (80Moreover, exploitation of the Saharan soil microorganisms has several interests and especially in maintaining the ecological equilibrium of ecosystems. Unfortunately, few of microbiological studies have been conducted so far about the Saharan soil Algerian, with the exception of some work done on the desert soils in the region of Beni Ounif. This work falls within the framework of Project CNEPRU F02320100009. The study focuses on an evaluation of the main germs rhizosphere soils from Argania spinosa and Acacia raddiana of the region of Oued El-ma (wilaya of Tindouf), located in southwest Algeria, followed by physicochemical analysis of some parameters (soil texture, pH, moisture content, organic matter). The results reveal that both rhizosphere soils have a sandy silt texture of alkali pH, with very low water content slightly different. Organic material of the rate varies from 0.2 to 1The type of vegetation influences positively the quantity and the dynamics of microbial population. Indeed, the two soils have an interesting microbial diversity, with densities of azotobacters, fungi, aerobic bacteria and actinomycetes are very high, followed germs ammonifiants, nitrifying and denitrifying. In the presence of Argania spinosa the microbial growth is most important (6.53 × 107 germs /g soil), compared with Acacia raddiana (3.13 × 107 germs /g). This shows the stimulating effect of the vegetation on the increase in the rate of these microorganisms in the soil. Well as the strong Fitness of adaptation the microbial biomass to drought. Keywords: Argania spinoza; Acacia raddiana; rhizospheric soil; microbiology evaluation.

  18. Amorçage d'une décharge dans le vide entre deux electrodes d'argent ou des alliages argent-nickel

    NASA Astrophysics Data System (ADS)

    Zouache, N.; Lefort, A.

    1997-03-01

    Comparison of the characteristics of an electric are breakdown in vacuum between two silver or silver-nickel alloy electrodes prompted us to study the evolution of the breakdown voltage with electrode separation, with resistance value placed between the anode and the high voltage supply used for the breakdown, and with the effect of conditionning by heating in vacuum. The measurement of the commutation time and delay time, and the observations by a metallographic microscope of the electrodes surfaces after one breakdown, enabled us to evidence the origin of the electric arc for each of the studied materials. La comparaison des caractéristiques de l'amorçage d'un arc électrique dans le vide entre deux électrodes bombées de 8mm de diamètre et de rayon de courbure en surface de 16mm, constituées d'argent ou de son alliage avec le nickel, nous a amené à étudier l'évolution de la tension d'amorçage avec plusieurs paramètres : la distance inter-électrodes, les valeurs de la résistance intercalée entre la source haute tension servant au claquage et les électrodes et le conditionnement par chauffage sous vide des électrodes. La mesure du temps de commutation, du temps de retard et les observations au microscope métallographique de la surface des électrodes après un amorçage donnent des informations sur l'origine de l'arc électrique concernant chaque matériau étudié.

  19. [Effects of saline-alkali stress on electrical impedance spectroscopy parameters and ion contents in shoots of Ping'ou hybrid hazelnut].

    PubMed

    Zhang, Li; Jia, Zhi-Guo; Ma, Qing-Hua; Zhang, Gang; Wang, Gui-Xi

    2014-11-01

    To study the adaptability to salt-alkaline stress of Ping'ou hybrid hazelnut, 'Liaozhen 3' shoots which were treated with three types of stress neutral NaCl, alkaline Na2CO3, and mixed salt-alkali, and the changes in electrical impedance spectroscopy (EIS) parameters and mineral ion contents were subsequently determined. The correlations between the EIS parameters and mineral ion contents were analyzed. The results showed that with the increasing level of NaCl, specific high- frequency resistance (r), specific low-frequency resistance ( r(l)), specific intracellular resistance (r(i)) and specific extracellular resistance (r(e)) of shoots decreased firstly, then increased, and finally decreased again. However, these parameters increased gradually with the increasing level of Na2CO3, while r(l) and r(e) decreased slowly in the mixed salt-alkali treatments. The Na+ contents of shoots increased significantly under the three salt-alkali stresses with the order of NaCl stress > mixed salt-alkali stress > Na2CO3 stress. Furthermore, Na2CO3 stress resulted in the decreases in the contents of three elements Zn, B and Ca. The significant negative correlation was found between the sum of five cations and four EIS parameters r(l), r(e), relaxation time (τ) , and distribution coefficient of relaxation time (ψ). The shoots of 'Liaozhen 3' might be tolerant of Na2CO3 stress of 200 mmol · L(-1), while they could be resistant to NaCl stress of 100-150 mmol · L(-1).

  20. Les fractures de jambe à fibula intact: traitement orthopédique ou enclouage centromédullaire? (étude comparative à propos de 60 cas)

    PubMed Central

    Abouchane, Merouane; Fadili, Assia; Belmoubarik, Amine; EL Andaloussi, Yassir; Nechad, Mohammed

    2015-01-01

    La fracture de jambe à fibula intact (FJFI) est caractérisée par un potentiel de déplacement minime ainsi le pronostic semble bon, souvent associées à des difficultés de réduction de consolidation ou de cal vicieux. Notre but est de comparer les résultats du traitement orthopédique et de l'enclouage centromédullaire (ECM). Entre janvier 2006 et janvier 2011, on a traité 60 fractures de jambe à fibula intact. 31 patients ont bénéficié d'un ECM, dont 14 fois était statique, 16 fois dynamique et simple une fois, avec un appui compris entre le 2eme jour (pour la plupart des patients) et la sixième semaine. 29 patients ont bénéficiés d'un traitement orthopédique après réduction par plâtre cruro-pédieux avec libération du genou après 4 semaines avec appui total chez la plupart des patients. La durée de consolidation été de 4 mois en moyenne pour les patients traites par ECM et de 6 mois pour les patients traites orthopédiquement. On a noté 3 cas de pseudarthrose dans notre série d’étude soit 5%: 2 observées chez le groupe de l'ECM soit 6,4% et un cas pour le groupe du traitement orthopédique soit 3,8%. 6 cas de déplacement secondaires ont été note chez les patients traites orhtopédiquement à j15 du traitement, pour 5 patients le déplacement été jugé tolérable et pour un seul patient (trouble angulaire supérieur à 10°) ayant nécessité un ECM. 13 cas soit 54% de cal vicieux angulaire supérieur à 10 dans notre série tous traités orthopédiquement versus aucun cas de cal vicieux chez les patients du groupe du traitement par ECM. Cliniquement: tous les patients traités par ECM ont présenté une mobilité du genou et de la cheville normale. Les patients traités orthopédiquement ont tous bénéficié d'une rééducation du genou libération du genou et confection d'un plâtre type Sarmiento et celle de la cheville après son ablation définitive, ainsi aucun de nos patients n'a gardé une raideur après avoir termin

  1. Approche au diagnostic de la maladie cœliaque chez les patients ayant une faible densité minérale osseuse ou des fractures de fragilité

    PubMed Central

    Rios, Lorena P.; Khan, Aliya; Sultan, Muhammad; McAssey, Karen; Fouda, Mona A.; Armstrong, David

    2013-01-01

    Résumé Objectif Présenter aux cliniciens une mise à jour sur le diagnostic de la maladie cœliaque (MC), ainsi que des recommandations sur les indications de procéder au dépistage de la MC chez les patients présentant une faible densité minérale osseuse (DMO) ou des fractures de fragilité. Qualité des données Un groupe de travail multidisciplinaire a élaboré des questions cliniquement pertinentes relativement au diagnostic de la MC servant de fondement à une recherche documentaire dans les bases de données MEDLINE, EMBASE et CENTRAL (de janvier 2000 à janvier 2009) à l’aide des mots clés en anglais celiac disease, osteoporosis, osteopenia, low bone mass et fracture. Les ouvrages scientifiques existants comportent des études de niveaux I et II. Message principal La prévalence estimée de la MC asymptomatique est de 2 % à 3 % chez les personnes qui ont une faible DMO. Par ailleurs, un dépistage ciblé est recommandé pour les patients qui ont des T-scores de −1,0 ou moins à la colonne vertébrale ou aux hanches ou des antécédents de fractures de fragilité associées à des symptômes ou à des problèmes reliés à la MC, des antécédents familiaux de MC ou de bas niveaux de calcium urinaire, une insuffisance en vitamine D et des niveaux à la hausse d’hormones parathyroïdiennes en dépit d’un apport suffisant en calcium et en vitamine D. Le dépistage de la MC devrait se faire pendant que le sujet consomme un régime alimentaire contenant du gluten. On procède au dépistage initial par le dosage d’immunoglobuline (Ig) A antitransglutaminase en utilisant la transglutaminase tissulaire humaine recombinante ou une autre transglutaminase tissulaire, en association avec l’immunofluorescence des IgA anti-endomysium. Une biopsie du duodénum est nécessaire pour confirmer le diagnostic de la MC. Le typage des antigènes des leucocytes humains peut aider à confirmer ou à exclure le diagnostic de la MC dans les cas où la s

  2. The Effects of Musical Training on Child Development: a Randomized Trial of El Sistema in Venezuela.

    PubMed

    Alemán, Xiomara; Duryea, Suzanne; Guerra, Nancy G; McEwan, Patrick J; Muñoz, Rodrigo; Stampini, Marco; Williamson, Ariel A

    2016-11-28

    Many studies have explored the links between music and children's outcomes; however, study designs have not been sufficiently rigorous to support causal findings. This study aims to assess the effects of a large-scale music program on children's developmental functioning in the context of high rates of exposure to violence. The paper describes the results of an experimental evaluation of Venezuela's National System of Youth and Children's Orchestras. The curriculum of the program, better known as "El Sistema," emphasizes social interactions through group instruction and group performances. The randomized control trial was conducted in 16 music centers between May 2012 and November 2013. In total, 2914 children ages 6-14 participated in the experiment, with approximately half receiving an offer of admission to the program in September 2012 and half in September 2013. The treatment group children participated for one semester more than the control group children. After 1 year, full-sample ITT estimates indicate improved self-control (by 0.10 standard deviations) and reduced behavioral difficulties (by 0.08 standard deviations), both significant at 10% after controlling for multiple hypothesis testing. There were no full-sample effects on other domains. Sub-sample effects are larger among (1) children with less-educated mothers and (2) boys, especially those exposed to violence at baseline. In the latter subgroup, we find lower levels of aggressive behavior. We find that the program improved self-control and reduced behavioral difficulties, with the effects concentrated among subgroups of vulnerable children. The results suggest the importance of devising mechanisms to target resources to the most vulnerable children.

  3. Modelizacion, control e implementacion de un procesador energetico paralelo para aplicacion en sistemas multisalida

    NASA Astrophysics Data System (ADS)

    Ferreres Sabater, Agustin

    Cualquier sistema electronico que incluya un procesado o tratamiento de la senal, y ademas, algun tipo de actuador mecanico generalmente necesita, como minimo, dos tensiones diferentes de alimentacion. Excluyendo los sistemas de alimentacion distribuida, la solucion tecnica mas utilizada para proporcionar dos o mas tensiones consiste en las fuentes de alimentacion multisalida. En una fuente de alimentacion multisalida los diferentes circuitos que conforman cada salida comparten un mismo transformador de potencia optimizando coste, masa, y volumen. Las ventajas obtenidas con este procedimiento tienen en su contra el efecto que sobre cada salida individual provocan las demas en su conjunto debido, principalmente, a los efectos de los elementos parasitos de los componentes. Un cambio de carga en una de las salidas produce un transitorio que es visto por todas las demas como un efecto de impedancia cruzada, y al final del transitorio, la tension de cada salida es diferente respecto a la que tenian antes del transitorio. Este ultimo resultado se conoce como regulacion cruzada. La disminucion de los efectos de la regulacion cruzada ha sido objeto de estudio durante los ultimos anos. El objetivo ha sido el desarrollo de distintas estrategias que permiten, desde disminuir los efectos de la regulacion cruzada hasta los niveles deseables, a eliminarla completamente. El resultado final suele suponer una penalizacion sobre el diseno del sistema directamente proporcional al grado de regulacion a conseguir en las distintas salidas. Entre las soluciones propuestas para eliminar la regulacion cruzada las tecnicas de post-regulacion se han consolidado como la opcion mas aceptada ya que, pueden aplicarse a cualquier convertidor y no suponen ninguna complejidad adicional a la hora de plantear el diseno. En esta Tesis Doctoral se abordara el estudio de la tecnica conocida como postregulacion mediante transformador controlado, que si bien se ha empleado en convertidores resonantes, su

  4. Complications du diverticule de Meckel (DM) chez l'adulte: à propos de 11 cas au CHU-Yalgado Ouédraogo au Burkina Faso

    PubMed Central

    Ouangré, Edgar; Zida, Maurice; Bazongo, Moussa; Sanou, Adama; Bonkoungou, Gilbert Patindé; Doamba, Rodrigue Namékinsba; Sawadogo, Elie Yamba; Ouédraogo, Sidziguin; Zongo, Nayi; Traore, Si Simon

    2015-01-01

    Le diverticule de Meckel (DM) est la persistance partielle du canal omphalomésentérique. Ses complications sont rares. Le diagnostic est le plus souvent per opératoire. L'objectif a été de décrire les complications du diverticule de Meckel chez l'adulte dans le service de chirurgie générale et digestive du CHU Yalgado Ouédraogo. Il s'est agi d'une étude transversale descriptive sur 10 ans (janvier 2004-décembre 2013) portant sur les dossiers des patients âgés de plus de 15 ans ayant présenté un DM compliqué. Durant la période d’étude, 11 cas ont été colligés. L'incidence annuelle a été de 11 cas. Nous avons noté une prédominance masculine avec un sex-ratio de 4,5. L’âge moyen des patients était de 29,8 ans. Le diagnostic préopératoire a été dans huit cas une occlusion intestinale aiguë, une appendicite aiguë dans deux cas, une péritonite aiguë généralisée dans un cas. Il a été diagnostiqué en peropératoire une occlusion intestinale dans neuf cas; une diverticulite dans un cas et un cas de perforation du DM. Tous les DM avaient été réséqués dont huit résections segmentaires iléales emportant le DM et trois résections cunéiformes. Tous les DM étaient situés à moins d'un mètre de la jonction iléo-caecale. L'histologie réalisée dans deux cas avait conclu à une diverticulite. Les suites opératoires ont été simples dans neuf cas, compliquées dans deux cas dont une éventration et un décès. Les complications du diverticule de Meckel sont rares. Le diagnostic préopératoire est difficile. Le traitement est essentiellement chirurgical. PMID:26958137

  5. [Political challenges facing the consolidation of the Sistema Único de Saúde: a historical approach].

    PubMed

    Rodrigues, Paulo Henrique de Almeida

    2014-01-01

    This article investigates the circumstances in which Brazil’s sanitation reform was conceived and the Sistema Único de Saúde (SUS) was constructed. A brief analysis is conducted of Brazil’s political transition to democracy, focusing on three political challenges facing the consolidation of SUS: its weak support base amongst workers, competition with the private sector, and the fragmentation of its administration caused by its municipalization. Finally, the changes in the scenario caused by the weakening of neoliberalism since the 2008 crisis, the reemergence of a multipolar political scenario internationally, and the financing conditions of the Brazilian State are described.

  6. Projeto do sistema anti-ressonante da fiação dos transdutores para o detector Mario Schenberg

    NASA Astrophysics Data System (ADS)

    Vieira, S. J.., Jr.; Melo, J. L.

    2003-08-01

    O detector de ondas gravitacionais Mario Schenberg está sendo projetado e construído pelo grupo Gráviton. Sua construção está ocorrendo no Laboratório de Estado Sólido e Baixas Temperaturas (LESBT) da Universidade de São Paulo, na cidade de São Paulo. Esse detector possui uma massa ressonante esférica de cobre-alumínio, com 65 cm de diâmetro, pesando aproximadamente 1150 Kg, suspensa por um sistema de isolamento vibracional, que se encontra em fase de testes preliminares. A real eficácia desse sistema, entretanto, só poderá ser comprovada quando o detector estiver aparelhado com, pelo menos, um transdutor eletromecânico de altíssima sensibilidade acoplado à massa ressonante. Neste momento, não só este sistema de isolamento vibracional será posto em teste, como o do projeto da fiação que transporta os sinais de microondas até os transdutores e destes para a pré-amplificação. Apesar dessa fiação ter sido projetada para não apresentar nenhum contato com a superfície esférica da antena, de maneira a não haver nenhuma transmissão de ruído vibracional do laboratório para esta, deve-se minimizar o ruído microfônico produzido nessa fiação por oscilações mecânicas, uma vez que ela não utiliza nenhum sistema de isolamento vibracional. Com o intuito de resolver este problema, projetamos uma estrutura, formada por pequenos cilindros conectados por barras, a qual não terá nenhuma ressonância mecânica na faixa de freqüências de interesse para detecção (3000 - 3400 Hz). Desta forma, as vibrações nessa faixa não serão amplificadas. O projeto foi feito usando iterativamente, de maneira a otimizar os resultados obtidos, o programa de elementos finitos Msc/Nastran. Através de simulações feitas neste programa, determinamos os parâmetros geométricos ideais a serem utilizados, os quais proporcionam a maior região espectral de interesse livre de ressonâncias.

  7. Transferências orbitais dentro do modelo quase bicircular no sistema Terra-Lua-Sol

    NASA Astrophysics Data System (ADS)

    Corrêa, A. A.; de Almeida Prado, A. F. B.; Stuchi, T. J.; Beaugé, C.

    2003-08-01

    O problema 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 problema restrito de três corpos (PRTC), incluindo termos periódicos não autônomos, provenientes da presença do Sol, portanto pode ser entendido como 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 problema 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.

  8. Slug Test Characterization Results for Multi-Test/Depth Intervals Conducted During the Drilling of CERCLA Operable Unit OU ZP-1 Wells 299-W10-33 and 299-W11-48

    SciTech Connect

    Newcomer, Darrell R.

    2007-09-30

    Slug-test results obtained from single and multiple, stress-level slug tests conducted during drilling and borehole advancement provide detailed hydraulic conductivity information at two Hanford Site Operable Unit (OU) ZP-1 test well locations. The individual test/depth intervals were generally sited to provide hydraulic-property information within the upper ~10 m of the unconfined aquifer (i.e., Ringold Formation, Unit 5). These characterization results complement previous and ongoing drill-and-test characterization programs at surrounding 200-West and -East Area locations (see Figure S.1).

  9. Un exemple de volcanisme calco-alcalin de type orogénique mis en place en contexte de rifting (Cambrien de l'oued Rhebar, Meseta occidentale, Maroc)

    NASA Astrophysics Data System (ADS)

    El Hadi, Hassan; Tahiri, Abdelfatah; Simancas Cabrera, Fernando; González Lodeiro, Francisco; Azor Pérez, Antonio; Jesús Martínez Poyatos, David

    2006-03-01

    The Middle Cambrian calc-alkaline Oued Rhebar volcanic complex (western Meseta, Morocco) compares with rocks originated in orogenic contexts. The La/Nb ratios are relatively high (5.2), suggesting a lithospheric mantle origin. The La/Ta ratios, higher than 26, and the negative Nb anomaly indicate a lithospheric source contaminated by the continental crust. These rocks were generated in the Mesetian Mid-Cambrian rift and would have inherited their orogenic signature from the partial melting of a previously metasomatized mantle. To cite this article: H. El Hadi et al., C. R. Geoscience 338 (2006).

  10. Comparison of Identify-Friend-Foe and Blue-Force Tracking Decision Support for Combat Identification (Comparaison des Systemes d’aide a la Decision Identification ami ou Ennemi et Suivi des Forces Bleues pour l’Identification au Combat)

    DTIC Science & Technology

    2011-02-01

    disposition de chaque soldat à pied. Deux expériences ont permis d’examiner l’efficacité des systèmes d’aide à la décision Identification ami ou ennemi (IAE...chaque fois qu’ils sont ciblés par une transmission donnée (infrarouge, radar, etc.). Les soldats munis du générateur et récepteur de signaux...rapidement et pourraient éventuellement être mises à la disposition de chaque soldat à pied. Deux expériences ont permis d’examiner l’efficacité des

  11. Resonances and Tides in Natural Satellites Systems. (Breton Title: Ressonâncias e Marés em Sistemas de Satélites Naturais.) Resonancias y Mareas en Sistemas de Satélites Naturales

    NASA Astrophysics Data System (ADS)

    Callegari, Nelson, Jr.

    2006-12-01

    In this work we describe some aspects of the dynamics of the mean-motion resonances. Emphasis to the case of resonances between regular satellites of the giant planets will be given, even so some aspects of the physics of the resonances in extra-solar planetary systems are also briefly treated. The role of the resonances in satellites systems is discussed through examples, showing how certain resonances, and its relations with the tidal dissipation effects, can be the key of the explanation of some phenomena still not explained in the Solar System. Amongst some examples we highlight the problem of the resurfacing of Enceladus, the existence of active volcanoes in Io, and the possible existence of the subsurface ocean in Europe. This work has as objective the divulgation of some topics in Celestial Mechanics and Planetary Sciences for an undergraduate public in exact sciences, as Astronomy and Physics, and not their detailed description. Neste trabalho descrevemos alguns aspectos da dinâmica de ressonâncias de movimentos médios. Será dada ênfase maior ao caso de ressonâncias entre satélites regulares dos planetas gigantes, embora alguns aspectos da física das ressonâncias em sistemas planetários extra-solares também sejam discutidos brevemente. A importância do estudo de ressonâncias em sistemas de satélites é discutida mais detalhadamente através de exemplos, mostrando como certas ressonâncias e suas relações com efeitos de dissipação de maré podem ser a chave de parte da explicação de alguns fenômenos ainda não explicados no Sistema Solar. Dentre vários exemplos destacamos o problema da remodelagem da superfície do satélite Enceladus, a existência de vulcões ativos em Io, e a possível existência do oceano subterrâneo em Europa. Este trabalho tem como objetivo a divulgação de alguns tópicos de Mecânica Celeste e Planetologia para um público de nível de graduação em disciplinas na área de exatas, em especial Astronomia e F

  12. El Sistema-inspired ensemble music training is associated with changes in children's neurocognitive functional integration: preliminary ERP evidence.

    PubMed

    Hedayati, Nina; Schibli, Kylie; D'Angiulli, Amedeo

    2016-12-01

    Children (aged 9-12) training in an El Sistema-inspired program (OrKidstra) and a matched comparison group participated in an auditory Go/No-Go task while event-related potentials (ERPs) were recorded. Entire-sweep waveform patterns correlated with known ERP peaks associated with executive and other cognitive functions and indicated that the spread of neural activity in the initial 250 ms of executive attention processing (pre-P300) showed higher level of topographical overlap in OrKidstra children. In these children, late potentials (post-P300) concurrent with response control were more widely distributed and temporally coordinated. Intensive ensemble music training, we suggest, may be associated with neuroplastic changes facilitating integration of neural information.

  13. Etude de l'effet de la température de dépôt ou de recuit sur la formation de l'interface Au/GaSb(100) par diffraction d'électrons lents et spectroscopies d'électrons Auger ou de pertes d'énergies

    NASA Astrophysics Data System (ADS)

    Rouanet, M.; Oueini, W.; Nouaoura, M.; Bertru, N.; Bonnet, J.; Lassabatere, L.

    1995-05-01

    Auger electron spectroscopy (AES), energy electron loss spectroscopy (EELS) and low energy electron diffraction (LEED) are used to precise the interaction of gold with GaSb(100) surfaces grown on GaSb substrates by molecular beam epitaxy (MBE). After the growth, the GaSb layers, produced in the laboratory, were transferred by the mean of an ultra vacuum lock chamber, into an other ultra vacuum devoted to the deposit of gold and to the physical studies. Measurements were first performed on the clean surfaces and then on surfaces covered by increasing amounts of gold (6 × 10^{13} 1.8 × 10^{16} atoms cm^{-2}) deposited on substrates brought at room temperature or at low temperature (220 K). The samples were then studied during the annealing up to 520 K. The results show, at the beginning of the deposition, gold was adsorbed on the MBE GaSb(100) surface. When the gold coverage increases and becomes higher than 10^{15} atomes cm^{-2}, Au diffuses into the bulk and forms alloys. Nous étudions par spectroscopie d'électrons Auger (SEA), spectroscopie de pertes d'énergies d'électrons lents (SPEEL) et diffraction d'électrons lents (DEL), l'adsorption de l'or sur des surfaces (100) de couches de GaSb obtenues au laboratoire par épitaxie par jets moléculaires (EJM) sur des substrats de GaSb, puis transférées pour dépôt et étude dans l'enceinte à ultravvide de dépôt métallique par l'intermédiaire d'un sas sous ultravide. Les mesures sont effectuées avant et après dépôts d'or (6 × 10^{13} 1,8 × 10^{16} atomes cm^{-2}) réalisés sur un substrat à la température ambiante ou refroidi à 220 K. Les échantillons sont ensuite étudiés pendant lerecuit jusqu'à 520 K. Les résultats obtenues montrent que l'or, dans un premier temps s'adsorbe sur la surface, puis, lorsque le dépôt augmente, diffuse dans le volume du matériau. cette diffusion, qui peut s'acompagner de la formation d'alliages, n'est cependant notable dans la gamme de température utilis

  14. La distribución de objetos en el Cinturón de Kuiper y la posible existencia de un nuevo planeta en el Sistema Solar

    NASA Astrophysics Data System (ADS)

    Brunini, A.

    A pesar de que la capacidad observacional no lo limita, no se han descubierto objetos en el Cinturón de Kuiper más allá de las 50 AU. Recientemente, hemos propuesto que un embrión planetario originalmente formado en la región de Urano-Neptuno, y posteriormente migrado hacia distancias mayores a 50-60 AU, puede explicar este hecho. Presentamos simulaciones numéricas de acreción del Sistema Solar exterior que muestran cómo, naturalmente, podriamos esperar que un planeta de este tipo se encuentre actualmente en regiones distantes del sistema solar. Analizamos además la posibilidad de detectarlo con instrumentos actuales.

  15. Obstáculos a la adherencia y retención en los sistemas de salud público y privado según pacientes y personal de salud

    PubMed Central

    Arístegui, Inés; Dorigo, Analía; Bofill, Lina; Bordatto, Alejandra; Lucas, Mar; Cabanillas, Graciela Fernández; Sued, Omar; Cahn, Pedro; Cassetti, Isabel; Weiss, Stephen; Jones., Deborah

    2016-01-01

    Resumen Introducción el Programa Nacional de Sida garantiza el acceso universal a los antirretrovirales, aun así las personas que reciben medicamentos a través del sistema público no logran obtener una carga viral indetectable en la misma proporción que los pacientes del sistema privado. Este estudio cualitativo tiene como objeto identificar los factores asociados a la adherencia y retención en la cascada de atención de VIH de los sistemas de salud público y privado de Buenos Aires, según las percepciones de pacientes y del personal de salud. Métodos se registraron datos cualitativos de 12 entrevistas semi-estructuradas a informantes clave y 4 grupos focales de pacientes y personal de salud tanto del sistema público como privado. Se codificaron y analizaron temas predeterminados sobre adherencia, utilizando el software QRS Nvivo9® de análisis de datos cualitativos. Resultados pacientes y personal de salud de ambos sistemas coinciden en la importancia del estigma asociado al VIH, la relación médicopaciente, la comunicación entre ambos y la división de responsabilidades en relación al tratamiento como aspectos fundamentales para la adherencia y retención en la cascada de atención. Se observan diferencias entre los sistemas en la forma en que algunos de estos aspectos actúan. Las barreras estructurales se presentan como principales obstáculos del sistema público. Discusión se resalta la necesidad de intervenciones focalizadas en la díada médico-paciente que considere las particularidades de cada sistema de atención para facilitar el compromiso del paciente en la adherencia. PMID:26878024

  16. The Development of Musical Skills of Underprivileged Children Over the Course of 1 Year: A Study in the Context of an El Sistema-Inspired Program

    PubMed Central

    Ilari, Beatriz S.; Keller, Patrick; Damasio, Hanna; Habibi, Assal

    2016-01-01

    Developmental research in music has typically centered on the study of single musical skills (e.g., singing, listening) and has been conducted with middle class children who learn music in schools and conservatories. Information on the musical development of children from different social strata, who are enrolled in community-based music programs, remains elusive. This study examined the development of musical skills in underprivileged children who were attending an El Sistema-inspired program in Los Angeles. We investigated how children, predominantly of Latino ethnicity, developed musically with respect to the following musical skills – pitch and rhythmic discrimination, pitch matching, singing a song from memory, and rhythmic entrainment – over the course of 1 year. Results suggested that participation in an El Sistema-inspired program affects children’s musical development in distinct ways; with pitch perception and production skills developing faster than rhythmic skills. Furthermore, children from the same ethnic and social background, who did not participate in the El Sistema-inspired music program, showed a decline in singing and pitch discrimination skills over the course of 1 year. Taken together, these results are consistent with the idea of musical development as a complex, spiraling and recursive process that is influenced by several factors including type of musical training. Implications for future research are outlined. PMID:26869964

  17. The Development of Musical Skills of Underprivileged Children Over the Course of 1 Year: A Study in the Context of an El Sistema-Inspired Program.

    PubMed

    Ilari, Beatriz S; Keller, Patrick; Damasio, Hanna; Habibi, Assal

    2016-01-01

    Developmental research in music has typically centered on the study of single musical skills (e.g., singing, listening) and has been conducted with middle class children who learn music in schools and conservatories. Information on the musical development of children from different social strata, who are enrolled in community-based music programs, remains elusive. This study examined the development of musical skills in underprivileged children who were attending an El Sistema-inspired program in Los Angeles. We investigated how children, predominantly of Latino ethnicity, developed musically with respect to the following musical skills - pitch and rhythmic discrimination, pitch matching, singing a song from memory, and rhythmic entrainment - over the course of 1 year. Results suggested that participation in an El Sistema-inspired program affects children's musical development in distinct ways; with pitch perception and production skills developing faster than rhythmic skills. Furthermore, children from the same ethnic and social background, who did not participate in the El Sistema-inspired music program, showed a decline in singing and pitch discrimination skills over the course of 1 year. Taken together, these results are consistent with the idea of musical development as a complex, spiraling and recursive process that is influenced by several factors including type of musical training. Implications for future research are outlined.

  18. Temporal dynamics of Trichodesmium erythraeum (Cyanophyta) in the National Park "Sistema Arrecifal Veracruzano" in the Gulf of Mexico.

    PubMed

    Aké-Castillo, José A

    2011-07-01

    Trichodesmium erythraeum Ehrenberg ex Gomont is a microalga worldwide distributed in tropical seas. This filamentous microalga was detected in phytoplankton samples collected in the Protected NaturalArea "Parque Nacional SistemaArrecifal Veracruzano", and because of its ecological importance, its temporal dynamics was studied using net samples (30 microm) collected in one year period. Samples were studied with a light microscope recording the presence, morphological characteristics, life form and relative abundance. Trichodesmium erythraeum occurred as single filaments and was rare in April 2007 and March 2008; as single filaments from May to August and December 2007; as single filaments and small aggregates in September 2007 and January 2008; in aggregates of large size (> 3mm) and high relative abundance in October 2007; and was absence in November 2007 and April 2008. Although the relative abundance of the species was not important comparing with other members of phytoplankton, its occurrence was frequent with a bloom at the beginning of the north winds period. The observed temporal dynamics of this microalga in this coral reef region comes up on the alert in the monitoring red tides programs being implemented in Veracruz coast.

  19. Experiências internacionais da aplicação de sistemas de apoio à decisão clínica em gastroenterologia

    PubMed Central

    Tenório, Josceli Maria; Hummel, Anderson Diniz; Sdepanian, Vera Lucia; Pisa, Ivan Torres; de Fátima Marin, Heimar

    2015-01-01

    Objetivo Descrever as experiências recentes com a aplicação de sistemas de apoio à decisão clínica em gastroenterologia, de forma a estabelecer o nível de desenvolvimento, testes e vantagens conferidas à prática médica com a introdução desses softwares. Métodos Foi realizada busca nas bases de dados PubMed, LILACS e ISI Web of Knowledge, utilizando termos relacionados à sistemas de apoio à decisão e à gastroenterogia, incluindo artigos originais publicados no período entre 2005 e 2010. Foram recuperadas 104 publicações, na busca inicial e, após a aplicação dos critérios de inclusão e exclusão, foram eleitos nove estudos para leitura do texto completo. Resultados Os sistemas de apoio à decisão clínica apresentam grande multiplicidade de problemas clínicos e investigação de doenças. Em 89% dos casos, são descritos modelos experimentais para o desenvolvimento de sistemas de apoio à decisão clínica. A descrição dos resultados obtidos por técnicas de inteligência artificial em 78% das publicações. Em dois dos estudos foram realizadas comparações com o médico e em apenas uma publicação um estudo controlado foi descrito, mostrando evidências de melhorias na prática médica. Conclusão Os estudos mostram potenciais benefícios dos sistemas de apoio à decisão clínica à prática médica, porém, estudos controlados em ambiente real devem ser realizados para comprovar esta perspectiva. PMID:26491625

  20. Culture ou Intercultures (Culture or Intercultural).

    ERIC Educational Resources Information Center

    Steele, Ross

    1996-01-01

    While planet Earth endeavors to transmit information instantaneously, cultural misunderstanding interferes with communication more than any language barrier. The article urges teachers of French to be cognizant of their role as cultural mediators. (Author/CK)

  1. Hernie inguinale ou vésicale ?

    PubMed Central

    El Anzaoui, Jihad; El Harrech, Y.; Abbaka, N.; Touiti, D.; Lahkim, M.; Fihri, J. Fassi; Bakzaza, W.; Majdane, M.; Achour, A.

    2013-01-01

    Résumé Si la hernie inguinale est une pathologie fréquente en chirurgie digestive, elle touche rarement la vessie. La hernie vésicale ne se manifeste généralement par aucun signe particulier, et son diagnostic est le plus souvent peropératoire, parfois même postopératoire lors de l’apparition de complications. Le traitement est chirurgical ; il consiste à réintégrer la partie herniée et à réaliser une pariétorraphie. Le présent article fait état de l’observation médicale d’un patient présentant une hernie vésicale de découverte peropératoire. PMID:24475009

  2. Utilisation de la post-décharge d'un plasma micro-ondes d'air ou d'azote pour valoriser le méthane

    NASA Astrophysics Data System (ADS)

    Oumghar, A.; Legrand, J. C.; Diamy, A. M.; Turillon, N.; Ben-Aïm, R. I.

    1994-01-01

    Valorization of methane is obtained by means of the reaction with a plasma. The plasma is produced in a quartz tube (30 mm in diameter) crossing a wave guide. The energy is supplied by a generator (Thomson CSF, 2 450 MHz, 15 to 1 500 W). Directional couplers followed by an attenuator and thermistor detectors enable forward Pi_i and reflected Pi_r power to be measured. Methane is introduced in the post-discharge zone through five tubes symmetrically arranged around the reactor. Methane consumption α, selectivity SX and yield RX are measured as a function of the following parameters : β methane/air ratio, F gaz flow, d distance where methane is introduced in the plasma, P pressure, Pi microwave power absorbed by air or nitrogen. It appears that acetylene is the major hydrocarbon obtained. The corresponding selectivity is increased when Pi and P are increased or when d and F are decreased. The optimum value of β is 4/5. If the best experimental conditions are selected, selectivity of total C2 reaches 44 % with a conversion ratio of 80 %. By decreasing methane/air ratio, carbon monoxide yield is increased. The ratio acetylene/ethylene can by varied without changing the conversion ratio, by introducing a catalyst in the post reaction zone. La valorisation du méthane est réalisée dans la post-décharge d'un plasma microondes (2 450 MHz) d'air ou d'azote. Lorsque la décharge est produite dans l'azote, les principaux produits dosés sont l'acétylène, l'éthylène, l'éthane et l'hydrogène. Lorsque la décharge est produite dans l'air, on dose en outre le monoxyde de carbone. Le taux de conversion du méthane ainsi que la sélectivité des produits ont été déterminés en fonction des paramètres expérimentaux suivants : proportion méthane/gaz plasmagène, flux gazeux, distance d'introduction du méthane dans la post-décharge, pression et puissance micro-ondes. Le procédé expérimenté permet d'obtenir des rendements chimiques importants et d'éviter la

  3. Assessment of the current and future water balance of the Ouémé catchment (Benin) for an integrated water resource management by using the WEAP water planning model

    NASA Astrophysics Data System (ADS)

    Giertz, Simone; Diekkrüger, Bernd; Höllermann, Britta

    2010-05-01

    Today, fresh water has already become a critically scarce resource in many regions of the world. In many developing countries insufficient water supply infrastructure aggravates this problem. With the ongoing global change and population growth water security will become one of the major problems in the 21st century. Regarding the annual water balance the West African Country Benin is not suffering from physical water scarcity. Nevertheless, investigations show that water scarcity occurs at the local scale, especially at the end of the dry season. This is caused by reduced water availability in this period and particularly by the inadequate water supply infrastructure. Facing the impacts of climate and socio-economic change, an assessment of the national water resources is an important step to assure a sustainable water resource management and to satisfy the raising water demand of Benin in the future. In the presented study the WEAP water planning model was used to analyse the current and future water balance of Benin's largest catchment Ouémé. To take into account the possible impacts of climate and socio-economic change, two IPCC scenarios (A1B and B1) and three socio-economic scenarios were simulated for the time period 2002-2025. The results show that the pressure on Benin's water resources will increase, due to population growth and changing socio-economic conditions. This leads to a greater competition for surface water especially during the dry season. Improving the access to groundwater is an alternative; however, financial and institutional constraints hinder such a development. Furthermore, declining catchment inflows and groundwater recharge aggravate the situation and require an adapted groundwater management. Beside the scenario results the presentation will also examine the uncertainties of the modelling process with WEAP. Furthermore, the suitability of the model in supporting a sustainable and integrated water resources management in developing

  4. Autographa californica multiple nucleopolyhedrovirus ODV-E56 envelope protein is required for oral infectivity and can be substituted functionally by Rachiplusia ou multiple nucleopolyhedrovirus ODV-E56.

    PubMed

    Harrison, Robert L; Sparks, Wendy O; Bonning, Bryony C

    2010-05-01

    The Autographa californica multiple nucleopolyhedrovirus (AcMNPV) odv-e56 gene encodes an occlusion-derived virus (ODV)-specific envelope protein, ODV-E56. In a previous analysis, the odv-e56 gene was found to be under positive selection pressure, suggesting that it may be a determinant of virus host range. To assess the role of ODV-E56 in oral infectivity and host range, we constructed recombinant AcMNPV clones (Ac69GFP-e56lacZ and AcIEGFP-e56lacZ) in which ODV-E56 protein synthesis was eliminated by inserting a beta-galactosidase (lacZ) expression cassette into the odv-e56 open reading frame. We also constructed a recombinant virus, Ac69GFP-Roe56, in which the native AcMNPV odv-e56 coding sequence was replaced with that of Rachiplusia ou multiple nucleopolyhedrovirus (RoMNPV), a closely related virus that is significantly more virulent towards some host species than AcMNPV. The odv-e56 recombinant viruses exhibited no alterations in polyhedron production and morphogenesis or in the production of infectious budded virus in cell culture. In bioassays using three lepidopteran host species, the oral infectivities of the odv-e56 mutant viruses Ac69GFP-e56lacZ and AcIEGFP-e56lacZ were profoundly impaired compared with those of wild-type and control recombinant viruses. Oral infectivity was restored fully by marker rescue of the odv-e56 mutant viruses with either the AcMNPV or the RoMNPV odv-e56 gene. In bioassays using two host species that are more susceptible to RoMNPV than to AcMNPV, Ac69GFP-Roe56 killed larvae with LC50 values similar to those of recombinant viruses expressing AcMNPV ODV-E56. This result indicated that replacement of the AcMNPV odv-e56 gene with the RoMNPV orthologue did not increase virulence against these two species.

  5. Epidémiologie et prise en charge des infections du per-partum à la maternité du centre hospitalier départemental de l'Ouémé-Plateau au Bénin

    PubMed Central

    Saizonou, Jacques; Ouédraogo, Laurent; Paraiso, Moussiliou Noël; Ayélo, Paul; Kpozèhouen, Alphonse; Daraté, René; Traoré, Esther

    2014-01-01

    Introduction La présente étude avait pour objectif de mesurer l'ampleur des infections du per-partum à la maternité du Centre Hospitalier Départemental de l'Ouémé-Plateau d'analyser les conditions de survenue et de prise en charge dans la perspective de l'amélioration des soins et services maternels et néonataux. Méthodes Une étude descriptive et analytique a été conduite de Août 2009 à Février 2010 et a impliqué 110 mères victimes d'infections du per-partum; elles ont été soumises à un questionnaire durant tout leur séjour hospitalier; des observations des pratiques de prise en charge des prestataires de soins ont été menées et des registres et autres supports de données sanitaires ont été exploités. L'analyse des données a été effectuée à l'aide du logiciel Epi Info 6.4 dans sa version française. Résultats L'incidence des infections du per-partum était de 5,9 pour 100 accouchements (110/ 1875); les types d'infections les plus incriminés étaient les endométrites (27,3%), les chorioamniotites (18,2%), les infections du site opératoire (12,7%) et les infections urinaires (2,7%). Les examens cliniques ont été relativement acceptables. En revanche, les examens biologiques ont été très insuffisants expliquant l'imprécision importante au niveau des diagnostics. L'antibiothérapie a été instaurée systématiquement. Le taux de mortinaissance était de 25,6% et les enfants de petit poids représentaient 23,2%. Conclusion L'incidence des infections du per-partum dans la présente étude était assez élevée. Des efforts de préventions et de dépistage de ces infections sont nécessaire afin d'améliorer la qualité des soins PMID:25120854

  6. Sensibilité à la détonation de divers mélanges gazeux explosifs : hydrazine, hydrogène et hydrocarbures/air ou oxygène

    NASA Astrophysics Data System (ADS)

    Dupré, G.; Lee, J. H.; Knystautas, R.; Péraldi, O.

    A number of experiments have been carried out in the framework of an informal cooperation between a french laboratory belonging to C.N.R.S. and McGill University at Montreal, with the aim of studying the propagation and the stability of a detonation wave in various gaseous explosive mixtures including hydrazine, hydrogen and some hydrocarbons with air or oxygen, in relation with the nature of the confinement, the chemical kinetics and the detonation structure. These studies point out the necessity of the presence of transverse waves or, in other words, of a tridimensional structure in the detonation front to allow a detonation to propagate. They give a measure and a comparison of the respective sensitivities to detonation of the explosive mixtures studied. This is of major importance for industrial safety. The sensitivity to detonation is evaluated from a "fundamental dynamic parameter" that is the detonation cell size. On décrit brièvement un certain nombre d'expériences effectuées dans le cadre d'une coopération informelle entre un laboratoire français du C.N.R.S. et l'Université McGill de Montréal, sur la propagation et la stabilité des détonations dans divers mélanges gazeux explosifs (hydrazine, hydrogène et divers hydrocarbures en mélange avec l'air ou l'oxygène), en relation avec la nature du confinement, la cinétique chimique et la structure de l'onde de détonation. Ces travaux mettent en évidence la nécessité de la présence d'ondes transversales, donc d'une structure tridimensionnelle dans le front de détonation pour en assurer la propagation. Ils visent aussi à connaître et à comparer entre eux la sensibilité à la détonation de ces gaz explosifs, à des fins de sécurité industrielle. Cette sensibilité peut être estimée grâce à un "paramètre dynamique fondamental" qui est la "largeur" de la cellule de détonation.

  7. Les manifestations oculaires au cours de la pré-éclampsie sévère ou l’éclampsie au Centre Hospitalier Universitaire Sourô Sanou de Bobo Dioulasso

    PubMed Central

    Diallo, Jean Wenceslas; Méda, Nonfounikoun; Ahnoux-Zabsonré, Ahgbatouhabéba; Ouattara, Souleymane; Yanogo, Armande; Tougouma, Somnoma Jean Baptiste; Somé, Der; Sanou, Jérôme; Dolo, Mariam

    2015-01-01

    La pré-éclampsie sévère est un problème de santé publique. L'atteinte oculaire est une de ses nombreuses complications. Le but de notre travail était de décrire les atteintes oculaires chez les patientes présentant une pré-éclampsie et/ou éclampsie afin de contribuer à leur meilleure prise en charge. Il s'est agi d'une étude transversale descriptive à collecte prospective allant du 1er novembre 2013 au 31 juillet 2014, chez les patientes ayant souffert de pré-éclampsie sévère/éclampsie. Nous avons inclus 127 patientes dans notre étude. La moyenne d’âge des patientes de notre étude était de 26,37 ans (ET= 6,8 ans), avec des extrêmes de 15 et 40 ans. Les tranches d’âge les plus représentées étaient celles de 26 à 30 ans avec 29,1% des cas et celle des 15 à 20 ans avec 25,2%. Le diagnostic de pré-éclampsie sévère a été retenu dans 69,3% des cas. Les primigestes représentaient 40,9% de la population. Les troubles visuels à type de phosphènes ont été observés chez 33,1% des patientes. Nous avons noté un courant granulaire conjonctival dans 41,7%, des lésions du segment postérieur chez 32,3% des patientes. Ces résultats ont été discutés par rapport à la littérature, et nous notons plus de cas d'atteinte rétinienne. Nous n'avons pas trouvé de lien statistiquement significatif entre la tension artérielle à l'admission et le stade de la rétinopathie hypertensive. Les complications oculaires de la pré-éclampsie sévère sont très fréquentes et souvent ignorées. Les atteintes rétiniennes sont fréquentes mais de bon pronostic. PMID:26405485

  8. Patients diabétiques de type 2 hypertendus: préfèrent-ils traiter le diabète ou l'hypertension artérielle?

    PubMed Central

    Aassri, Hind El; El Mghari, Ghizlane; El Ansari, Nawal

    2014-01-01

    Les diabétologues sont confrontés à des diabétiques le plus souvent hypertendus et polypathologiques, les rendant peu observants des différentes thérapeutiques prescrites. Le but de notre étude est d’évaluer l'observance au traitement chez les patients diabétiques hypertendus. Il s'agit d'une étude descriptive prospective transversale. La population est faite de patients diabétiques de type 2 hypertendus vus aux urgences, à la consultation ou hospitalisés au service d'Endocrinologie. L’échantillon est non probabiliste. La population est faite de 61 patients, d'un âge moyen de 48,9 ans avec une hypertension (HTA) de type systolique dans 59%, diastolique dans 16% et systolo-diastolique dans 25% des cas. Les patients sont équilibrés sur le plan glycémique dans 65% des cas, alors que l’équilibre tensionnel n'est atteint que dans 41% des cas. En ce qui concerne l'observance thérapeutique, 24% des patients sont observant totalement au traitement prescrit, 33% ne sont pas observant au traitement et 43% ont une observance partielle au traitement dont 73.68% préfèrent le traitement destiné au diabète et 26,32% prennent le traitement anti hypertenseur. Les facteurs altérant l'observance au traitement médicamenteux sont un surcoût du traitement un nombre élevé de médicaments prescrits, un nombre important de prises quotidiennes de médicaments, une intolérance au traitement et une mauvaise information du patient sur la justification du traitement. Enfin, les patients diabétiques hypertendus sont classés comme patients à haut risque cardiovasculaire ce qui impose l'application de stratégies thérapeutiques parfois lourdes. Cette polymédication entrave la qualité de l'observance thérapeutique des patients ayant une pathologie chronique dont la compliance au traitement constitue la pierre angulaire de la prise en charge, et ce pour plusieurs raisons en particulier d'ordre économique. PMID:25396019

  9. [The history of the public health reform in Brazil and of the Sistema Único de Saúde: changes, continuities, and the current agenda].

    PubMed

    Menicucci, Telma Maria Gonçalves

    2014-01-01

    The paper offers a historical retrospective of Brazil's Sistema Único de Saúde (SUS), including its background and its legacy on its current design. It begins describing some of the system's structural problems, especially the co-existence of a public system alongside a private one. It identifies problems that have hampered a firmer solidification of SUS, while it also highlights the immense import of establishing a unified, universal system in a country the size of Brazil. The discussion includes the effects of the system, which has represented a major change in the field of social rights, introducing new actors, and internalizing the notion of health as a right. Lastly, recent developments that have put SUS on the public agenda are discussed.

  10. [Considerations on the Sistema Único de Saúde in the twenty-first century: an interview with Lígia Bahia].

    PubMed

    Bahia, Lígia; Cueto, Marcos; Benchimol, Jaime; Teixeira, Luiz Antonio; Cerqueira, Roberta C

    2014-01-01

    This interview with Lígia Bahia explores evaluations of the first 25 years of Brazil's Sistema Único de Saúde (SUS) and analyzes the project's progress, impasses, and missteps. Bahia is critical of both tendencies currently found within SUS: the one that sees the system as aimed at equity and the other posing equality as its goal. She criticizes the ambivalence that various spheres of government have displayed in their decisions regarding large corporate groups and private health insurance plans, which conflict with the ideas of SUS. She evaluates the participation of doctors and other healthcare professionals in the system. Lastly, she analyzes the emergence of identity politics, which are missing from the public health reform project, whose emphasis was on equality.

  11. Cobertura de los sistemas de pensiones y factores asociados al acceso a una pensión de jubilación en México

    PubMed Central

    Murillo-López, Sandra; Venegas-Martínez, Francisco

    2016-01-01

    Resumen Objetivos: obtener estimaciones de indicadores de cobertura de las pensiones por jubilación o retiro para la población mexicana de 65 y más años, y evaluar el impacto que tienen los sistemas de pensiones en las transiciones al retiro de los adultos en edades medias y avanzadas en México. Para ello se utilizan datos microeconómicos provenientes de la Encuesta Nacional de Salud y Envejecimiento. Mediante análisis econométrico se identifican los factores sociodemográficos, económicos, laborales e institucionales que están asociados al acceso a una pensión de jubilación, o bien, a la dependencia de otras fuentes de ingresos. Se encontró que, en México, las transiciones al retiro del mercado de trabajo en las etapas avanzadas del ciclo de vida son limitadas debido a las características eminentemente contributivas de los esquemas de pensiones, los cuales favorecen a la población con trayectorias laborales formales y más estables asociadas a: características de género, oportunidades educativas y posibilidades de inserción en el mercado laboral. PMID:27524936

  12. Hepatitis B in children in Italy: incidence and risk factors: SEIEVA Collaborating Group. Sistema Epidemiologico Integrato dell'Epatite virale Acuta.

    PubMed

    Corona, R; Gandolfi, C; Ferrigno, L; Sagliocca, L; Ciaralli, F; Martelli, A; Galanti, C; Moiraghi, A; Palumbo, F; Novaco, F

    1994-04-01

    The objectives of the present report were to give a baseline picture of hepatitis B notification incidence rates in children before the campaign of mass vaccination for newborns and adolescents (12-13 years old), and to study the role of different risk factors. Data from a specific national surveillance system of acute viral hepatitis (SEIEVA, Sistema Epidemiologico Integrato dell'Epatite Virale Acuta) were used and acute hepatitis B cases were compared to acute hepatitis A patients with the case-control study method to estimate the associations with the considered risk factors. Since the system began, one hundred and sixty-three local health departments have joined SEIEVA covering 30% of the Italian population. The incidence of acute hepatitis B notifications among 0-14 aged children was 9 per 100,000 in 1985 and 1 per 100,000 in 1990. Such decline in incidence was observed in both the North and the South of Italy. Surgical interventions, dental therapy and household contacts with a HBsAg chronic carrier were found to be associated with acute hepatitis B. The point estimate of the odds ratio was 10 for the latter risk factor. Other preventive measures in addition to vaccination are needed to control the risk of hepatitis B infection and other parenteral diseases due to surgical intervention and dental therapy.

  13. Positive predictive value of ICD-9th codes for upper gastrointestinal bleeding and perforation in the Sistema Informativo Sanitario Regionale database.

    PubMed

    Cattaruzzi, C; Troncon, M G; Agostinis, L; García Rodríguez, L A

    1999-06-01

    We identified patients whose records in the Sistema Informativo Sanitario Regionale database in the Italian region of Friuli-Venezia Giulia showed a code of upper gastrointestinal bleeding (UGIB) and perforation according to codes of the International Classification of Diseases (ICD)-9th revision. The validity of site- and lesion-specific codes (531 to 534) and nonspecific codes (5780, 5781, and 5789) was ascertained through manual review of hospital clinical records. The initial group was made of 1779 potential cases of UGIB identified with one of these codes recorded. First, the positive predictive values (PPV) were calculated in a random sample. As a result of the observed high PPV of 531 and 532 codes, additional hospital charts were solely requested for all remaining potential cases with 533, 534, and 578 ICD-9 codes. The overall PPV reached a high of 97% for 531 and 532 site-specific codes, 84% for 534 site-specific codes, and 80% for 533 lesion-specific codes, and a low of 59% for nonspecific codes. These data suggest a considerable research potential for this new computerized health care database in Southern Europe.

  14. Discordance gradient-surface dans le rétrécissement mitral: le gradient moyen transmitral est-il un critère de sévérité ou un indice de tolérance du rétrécissement mitral serré?

    PubMed Central

    Najih, Hayat; Arous, Salim; Laarje, Aziza; Baghdadi, Dalila; Benouna, Mohamed Ghali; Azzouzi, Leila; Habbal, Rachida

    2016-01-01

    Le rétrécissement mitral (RM) rhumatismal demeure une valvulopathie fréquente dans les pays en voie de développement. Cependant, les pays industrialisés ont vu l'émergence ces dernières années de nouvelles étiologies de RM; notamment l'origine médicamenteuse et/ou toxique responsable de valvulopathies restrictives aussi bien sténosantes que régurgitantes. Pour cette raison, l'évaluation échocardiographique du RM et surtout, la définition de critères objectifs pour conclure au caractère serré du RM reste toujours d'actualité. Les objectifs du travail sont: évaluer l'existence ou non d'une corrélation directe entre le gradient moyen transmitral (GMT) et la sévérité du RM chez les patients porteurs d'un RM serré ou très serré (critère primaire) et analyser les différents paramètres qui conditionnent le gradient moyen transmitral (GMT) (Critère secondaire). Il s'agit d'une étude transversale monocentrique incluant tous les patients admis au service de Cardiologie du CHU Ibn Rochd de Casablanca pour un RM serré ou très serré, sur une période d'une année (Janvier 2014 à Décembre 2014). Nous avons analysés séparément deux groupes de patients : ceux avec un gradient moyen transmitral<10 mmHg (groupe 1) et ceux avec un gradient>10mmHg (groupe2). 50 patients porteurs d'un RM serré ou très serré ont été inclus. L'âge moyen de nos patients est de 41,7 ans avec prédominance féminine (sex ratio: 0,25). 64% de nos patients avaient un RM serré et 36% avaient un RM très serré. 52% (26 patients) avaient un GMT <10mmHg et 48% (24 patients) avaient un gradient moyen >10mmHg, ce qui suggère l'absence de corrélation directe entre la sévérité du RM et le GMT (coefficient de Pearson R: -0,137). Pour la dyspnée, 80% des patients du groupe 1 étaient dyspnéiques stade II de la NYHA et 70% des patients du groupe 2 étaient dyspnéiques stade III (41%) ou IV (29%) de la NYHA, ce qui signifie l'existence d'une corr

  15. The Forum for Defence of the Brazilian Unified Health System (Sistema Único de Saúde) and its role in building community participation in the fight against the privatization of health.

    PubMed

    de Lara, Lutiane; Guareschi, Neuza Maria de Fátima

    2016-03-01

    Based on a Foucauldian framework, this article discusses the involvement of the Forum for Defence of the Sistema Único de Saúde in the fight against health care privatization. Community participation is a locus of experience that produces subjects implicated in the production of public health care. The locus of experience in this instance derives from the rejection of private elements that historically have been part of Brazilian public policies. It is an experience that produces workers and service users as agents able to defend the public system and endowed with instituting power.

  16. A critical view of the 'social reinsertion' concept and its implications for the practice of psychologists in the area of mental health in the Brazilian Unified Health System (Sistema Único de Saúde).

    PubMed

    Frazatto, Carina F; Sawaia, Bader B

    2016-03-01

    Improving psychological practice in mental health services in the Brazilian Unified Health System (Sistema Único de Saúde) requires a critical analysis of core concepts of the psychiatric reform, such as 'social reinsertion'. This analysis, oriented by the dialectics of exclusion/inclusion, showed that this concept is impregnated with the adaptation paradigm and asylum view which prevents its effective implantation. The results suggest it is necessary to include social aspects in the discussion of mental health, articulating it with networks of social work and recuperating the revolutionary aspects of the psychiatric reform, thus demarcating the political nature of professional practices.

  17. Aspergilosis cervical con diseminación al sistema nervioso central. Presentación de un caso y revisión de bibliografía

    PubMed Central

    Vergara, Guillermo Enrique; Roura, Natalia; del Castillo, Marcelo; Mora, Andrea; Alcorta, Santiago Condomi; Mormandi, Rubén; Cervio, Andrés; Salvat, Jorge

    2015-01-01

    Introducción: la Aspergilosis Invasiva (AI) del Sistema Nervioso Central (SNC) es infrecuente y ocurre generalmente en pacientes inmunocomprometidos. Puede presentarse con cuadros de meningitis, aneurismas micóticos, infartos o abscesos. Es una infección con pronóstico reservado y puede afectar el SNC de forma primaria o secundaria a partir de un foco que se disemina por vía hematógena. Presentamos el caso de un paciente con AI con invasión primaria a nivel óseo y diseminación posterior al cerebro. Caso clínico: Paciente masculino de 25 años con diagnóstico de leucemia linfática aguda en tratamiento quimioterápico que presentó neumonitis por metotrexate por lo que inicia tratamiento con corticoides. Posteriormente agregó cervicalgia y con el diagnóstico de osteomielitis cervical se realiza punción bajo tomografía computada (TC) sin aislarse gérmenes. Se colocó Halo Vest e inició tratamiento antibiótico empírico. Posteriormente presentó afasia de expresión secundaria a lesión frontal izquierda. Se realizó evacuación de absceso cerebral aislando A. fumigatus. El tratamiento antibiótico específico posterior permitió una buena respuesta clínica y radiológica. Conclusión: La presencia de lesiones en el SNC de pacientes inmunocomprometidos debe incluir a las micosis como diagnóstico diferencial. La evacuación quirúrgica permite llegar rápidamente al diagnóstico mejorando la respuesta posterior al tratamiento antibiótico. Para evaluar la respuesta terapéutica y posibles recaídas se debe realizar un seguimiento periódico clínico radiológico. Palabras clave: Aspergilosis cerebral; Aspergilosis cervical; Aspergilosis invasiva; Voriconazol. PMID:26600985

  18. Sistema de Gravacao Dados Digitais

    NASA Astrophysics Data System (ADS)

    Neri, J. A. C. F.; Jayanthi, U. B.; Alves, A. M. R.

    1990-11-01

    ABSTRACT. A Large data ( 3.7 Gigabytes/tape) recording system using commercial videocassette recorders with digital data interface is being developed at INPE. The digital interface converts the data into NTSC video format for recording. This high-speed system is planned for use in stratospheric balloon experiments. tt'Oit : DATA RECORDING - INSTRUMENTS

  19. Gestion des plaines inondables: Hauteur ou débit

    NASA Astrophysics Data System (ADS)

    El-Jabi, Nassir; Rousselle, Jean

    1983-07-01

    A stochastic model based on the recent developments in the theory of extreme values is presented to describe the flood occurrence. This model is applied to the "Rivière des Prairies", assuming that the exceedances (flood peak and/or stage above a given base flow and/or base stage) are independent and identically distributed in the time interval for a given year and season.

  20. Le bilingue, surhomme ou infirme? (The Bilingual, Superman or Cripple?)

    ERIC Educational Resources Information Center

    Tournier, Michel

    1975-01-01

    Discusses good translation techniques, "true bilingualism," and the effect of bilingualism on cognitive development. (Text is in French.) Available from Lloyds Bank Chambers, 91 Newington Causeway, London SE1 6BN, England. (AM)

  1. "Etre" ou ne pas "etre" in Immersion French.

    ERIC Educational Resources Information Center

    Knaus, Valerie; Nadasdi, Terry

    2001-01-01

    Examines verbal auxiliary selection in the speech of French immersion students. Examines variation in auxiliary selection in the oral discourse to determine to what extent it resembles that of native speakers. (Author/VWL)

  2. Analisis del contenido curricular de los Documentos Normativos del Programa de Ciencias en el area de biologia para la escuela superior del sistema de educacion publica de Puerto Rico: 1993-2012

    NASA Astrophysics Data System (ADS)

    Davila Montanez, Melissa

    Esta investigacion de naturaleza cualitativa se ocupo de realizar un analisis de contenido documental de los Documentos Normativos del Programa de Ciencias en el area de biologia de la escuela superior del sistema de educacion publica de Puerto Rico del periodo 1993-2012. Los documentos analizados fueron: Guia Curricular, 1995; Marco Curricular, 2003; Estandares de Excelencia, 1996, 2000 y Estandares de Contenido y Expectativas de Grado, 2007. Se indago si hubo cambios en significados en los Componentes Estructurales: Naturaleza de la ciencia, Paradigmas para la ensenanza de la ciencia, Funcion del curriculo formal, Mision de la ensenanza de la ciencia; Contenidos, destrezas y competencias, Estrategias de ensenanza y Evaluacion/Assessment del aprendizaje. El analisis sugiere que no hubo cambios sustanciales en los significados de los Componentes Estructurales. Los documentos estudiados muestran mayormente caracteristicas similares, aunque los documentos mas recientes eran mas descriptivos, explicativos y especificos.

  3. Poorer functionality is related to better quality of life response following the use of biological drugs: 6-month outcomes in a prospective cohort from the Public Health System (Sistema Único de Saúde), Minas Gerais, Brazil.

    PubMed

    de Oliveira Junior, Haliton Alves; dos Santos, Jéssica Barreto; Acurcio, Francisco Assis; Almeida, Alessandra Maciel; Kakehasi, Adriana Maria; Alvares, Juliana; de Carvalho, Luis Fernando Duarte; Cherchiglia, Mariangela Leal

    2015-06-01

    We aim to analyze factors associated with the quality of life (QOL) response of individuals with rheumatic diseases treated by the Public Health System (Sistema Único de Saúde) with biological disease-modifying antirheumatic drugs (bDMARDs). Data from 428 patients using bDMARDs were collected using a standardized form at baseline and 6 months after the onset of treatment. The average reduction of the scores on EuroQol-five dimension was 0.11 ± 0.18 6 months after the onset of treatment with bDMARDs, denoting significant improvement of the participants' QOL. All the investigated types of disease exhibited significant improvement at the 6-month assessment, without any difference among them (p = 0.965). The participants with baseline poorest functionality and best QOL exhibited the best QOL outcomes after 6 months of treatment. Our study showed that the use of biological drugs induced considerable improvement in the participants' QOL.

  4. Analyse de l'effet des courants induits sur l'impédance d'un système électromagnétique alimenté en tension BF ou HF. Utilisation de la méthode des circuits couplés

    NASA Astrophysics Data System (ADS)

    Maouche, B.; Feliachi, M.

    1997-10-01

    In this paper, a study of the interaction between the inductor and the load of an axisymmetrical induction device is proposed. This interaction concerns the effect of the eddy current on both the excitation current and on the system impedance. A half analytical model, based on a numerical discretization of the electromagnetic solution domain, is used. In each cell of the numerical discretization, an analytical calculation using the Moment Method (MM) is considered. In the case of strong skin effect (High Frequency: HF), the formulation makes use of the Impedance Boundary Condition (IBC); in the contrary case (Low Frequency: LF), the interior domain is discretized. Dans cet article nous proposons l'étude de l'influence d'une charge (induit) conductrice sur la répartition du courant inducteur ainsi que sur l'impédance du système. L'inducteur est à géométrie axisymétrique de forme solénoïdale ou pancake destiné au chauffage par induction. Une méthode semi-analytique, basée sur une discrétisation du domaine en mailles élémentaires auxquelles s'applique une formulation intégrale (Méthode des Circuits Couplés : MCC) des grandeurs électromagnétiques, est utilisée. Dans le cas où l'effet de peau est important (Haute Fréquence:HF), la formulation associe la Condition d'Impédance de Surface; dans le cas contraire (Basse Fréquence : BF), un maillage du domaine interne est pratiqué.

  5. "Canteiro Escola"--Uma Resposta da Industria da Construcao no Contexto Produtivo Atual (The "Building Site" School--A Construction Industry Answer in the Actual Productive Context).

    ERIC Educational Resources Information Center

    Barone, Rosa Elisa; Letelier, Maria Eugenia

    1995-01-01

    Presents examples of the discourse of construction industry personnel involved in workplace basic education in Brazil. Reports on the perspective of the workers/students and on the experiences and the vision of those who implement the educational programs. Identifies the limits of the schooling process and the difficulties inherent in the present…

  6. Effet de la concentration du cuivre ou de l'argent sur les propriétés des agrégats de rhodium déposés sur silice amorphe dans l'hydrogénation du 1,3 butadiène

    NASA Astrophysics Data System (ADS)

    Ksibi, Z.; Ghorbel1, A.; Bellamy, B.

    1999-02-01

    Some samples with rhodium, rhodium-copper and rhodium-silver deposited on amorphous silica by vapor deposition of the metallic phase under high-vacuum (P < 5.10-7 Pa) have been prepared. The effect of rhodium cluster size and copper or silver addition on catalytic properties of rhodium in the 1,3 butadiène hydrogenation was studied. Results show that the reaction is sensitive to the size of rhodium aggregates and that there is an important difference between the effect of copper and silver on the rhodium properties. Indeed copper forms an alloy with rhodium and provokes a poison effect on the activity of the noble metal, whereas silver exhibits a mask effect on the rhodium particles without forming alloy with it. Des échantillons mono-métalliques au rhodium et bimétalliques rhodium-cuivre et rhodium-argent déposés sur une silice amorphe par vapodéposition d'une phase métallique dans des conditions ultra-vide (P < 5.10-7 Pa) ont été préparés. L'effet de la taille des agrégats de rhodium ainsi que celui de l'addition du cuivre ou de l'argent sur les propriétés catalytiques du rhodium dans l'hydrogénation du 1,3 butadiène ont été étudiés. Les résultats montrent que la réaction étudiée est sensible à la taille des agrégats de rhodium et nous notons une différence importante entre l'effet du cuivre et de l'argent sur les propriétés du rhodium. En effet le cuivre forme un alliage avec le rhodium et provoque un effet poison d?où une modification de l'activité du métal noble, alors que l'argent exerce un effet de masque sur les particules de rhodium sans toutefois former d'alliage avec ce dernier.

  7. Health and safety plan for operations performed for the Environmental Restoration Program. Task, OU 1-03 and OU 4-10 Track 2 investigations

    SciTech Connect

    Trippet, W.A. II; Reneau, M.; Morton, S.L.

    1992-04-01

    This document constitutes the generic health and safety plan for the Environmental Restoration Program (ERP). It addresses the health and safety requirements of the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA); Occupational Safety and Health Administration (OSHA) 29 CFR 1910.120 standard; and EG&G Idaho, Inc. This plan is a guide to individuals who must complete a health and safety plan for a task performed for the EPR. It contains a task specific addendum that, when completed, specifically addresses task specific health and safety issues. This health and safety plan reduces the time it takes to write a task specific health and safety plan by providing discussions of requirements, guidance on where specific information is located, and specific topics in the Addendum that must be discussed at a task level. This format encourages a complete task specific health and safety plan and a standard for all health and safety plans written for ERP.

  8. Medio ambiente y cáncer pediátrico en la Región de Murcia (España): integrando la historia clínica medioambiental en un sistema de información geográfica

    PubMed Central

    Ortega-García, J.A.; López-Hernández, F.A.; Sobrino-Najul, E.; Febo, I.; Fuster-Soler, J.L.

    2016-01-01

    Introducción Medio Ambiente y Cáncer Pediátrico (CP) en la Región de Murcia (RM) es un proyecto de investigación, cuya principal meta es el desarrollo de una cuidadosa historia ambiental pediátrica (HAP) y el uso de sistemas de información geográfica (SIG) para crear mapas de incidencia y analizar la distribución geográfica del CP en la RM. El objetivo es presentar la metodología, el estudio descriptivo y los primeros resultados sobre la incidencia espacial y temporal del CP en la RM (España). Material y métodos Estudio descriptivo y de georreferenciación de todos los casos de CP menores de 15 años, diagnosticados entre el 1 de enero de 1998 y el 31 de diciembre de 2009. Se han asociado a cada caso tres direcciones postales, durante el embarazo, en el período posnatal y en el momento del diagnóstico. También se han utilizado las siguientes variables: sexo, fechas de nacimiento y diagnóstico y el diagnóstico patológico. Resultados No se observa un incremento en la tendencia de la incidencia del CP. La tasa cruda de incidencia fue de 14,3 casos por 100.000 niños menores de 15 años. La razón de incidencia estandarizada es más elevada en el noroeste de la RM. El 30% tienen un domicilio previo al diagnóstico distinto al del embarazo. Conclusiones La integración de la información temporal y espacial de la HAP en un SIG permitirá la identificación y el estudio de conglomerados espacio-temporales a través de un sistema de vigilancia medioambiental que ayude a ponderar la importancia de los factores de riesgo asociados. PMID:21315667

  9. Assessing causes of death in the Cardiology Department of Yalgado Ouédraogo University Hospital

    PubMed Central

    Yameogo, Aristide Relwende; Mandi, Germain; Millogo, Georges; Samadoulougou, Andre; Zabsonre, Patrice

    2014-01-01

    Introduction Analysis of the underlying causes of death can develop action plans for prevention of death that could be avoided. The aim of our study was to analyse the causes of cardiovascular deaths in the cardiology department of Yalgado Ouedraogo University Hospital. Methods The study was a descriptive retrospective study over a 24 month period among patients who died in the department. Results Prevalence of death in the cardiology department was of 13.2%. Sex ratio was of 1.2 and 72.7% of patients were residing in Ouagadougou. Mean age of patients was 56.1 years and 59.4% of patients were under 65 years old. Hypertension was the major cardiovascular risk factor (46.1%) and 27.4% of patients had a medical history of dilated cardiomyopathy. Cardiogenic shock was the immediate cause of death in 55.5% of cases and the initial cause of death was hypertension and its complications in 46.1% of cases. Death was not notified in 18% of cases and no death had been medically certified. Conclusion Death statistics are the most reliable data for public health interventions. However, it is necessary to establish an effective method of data gathering according to the WHO standards in order to facilitate international comparison. PMID:25767673

  10. La terminologie, outil et/ou objet pedagogique (Terminology, Instructional Tool and/or Object).

    ERIC Educational Resources Information Center

    Van Deth, Jean-Pierre

    1990-01-01

    It is proposed that while interest has focused on specialized professional vocabulary as an object of language instruction, the same vocabulary can be viewed as a tool for teaching. The exchange of concepts and terminology between student and teacher improves student understanding of the language and the problems of translation. (MSE)

  11. Final Water Quality Monitoring Summary Report, 2013 Remedial Dredging, OU1, August 2014

    EPA Pesticide Factsheets

    This report presents the scope, monitoring methods, decision criteria used, field and analytical results and key findings from the water quality monitoring performed during the 2013 dredge season at the New Bedford Harbor Superfund Site.

  12. Groundwater Strategy for the Ou-1 Landfill Area, Miamisburg Closure Project, Ohio

    SciTech Connect

    LOONEY, BRIANB.

    2004-01-01

    The general objective of the study was to assist the Miamisburg Closure Project in their efforts to develop and refine a comprehensive, technically sound strategy for remediation of groundwater contaminated with trichloroethylene and other volatile organic compounds in the vicinity of the landfill in Operable Unit 1. To provide the necessary flexibility to the site, regulators and stakeholders, the resulting evaluation considered a variety of approaches ranging from ''no further action'' to waste removal. The approaches also included continued soil vapor extraction, continued groundwater pump and treat, monitored natural attenuation, biostimulation, partitioning barriers, hydrologic modification, and others.

  13. Introduction. Types de discours, ou fonctionnement discursif (Introduction. Types of Discourse, or Discursive Function)

    ERIC Educational Resources Information Center

    Guespin, L.

    1976-01-01

    Discusses the limits of Harris' and Chomsky's models for discourse analysis and questions their epistemological basis. Also discusses the "French school of discourse analysis." (Text is in French.) (AM)

  14. Professionnalisation ou Deprofessionnalisation: Une Base Conceptuelle pour L'evaluation de La Competence en Psychologie.

    ERIC Educational Resources Information Center

    Perron, Jacques; And Others

    1980-01-01

    Elements of professionalization--systematic body of theory, social recognition, monopoly, and degree of organization--are presented and applied to the development of professional psychology in Quebec. The concept of deprofessionalization is introduced as an alternative basis for evaluating competence in professional psychology. (Author)

  15. Antoine Béchamp: pere de la biologie. Oui ou non?

    PubMed

    Manchester, K L

    2001-06-01

    There is an alternative medicine lobby that, in conjunction with antivivisectionists, believes Louis Pasteur to have been a fraud [R. Bottomley's You Don't Have to Feel Unwell! (Newleaf, 1994) is a recent example]. They frame their accusations around a rivalry between Pasteur and a contemporary, Antoine Béchamp, from whom they suggest Pasteur stole his ideas and then distorted them for his own purposes. This article explores some aspects of the controversies between Béchamp and Pasteur.

  16. Sources semiconductrices de photons uniques ou de photons jumeaux pour l'information quantique

    NASA Astrophysics Data System (ADS)

    Berger, Vincent; Gérard, Jean-Michel

    2003-07-01

    A large number of scientific proposals in recent years are based on transport and manipulation of information using single quantum objects. Although very impressive theoretical perspectives have been envisaged, experimental demonstrations are still limited due to technological difficulties with present state-of-the-art devices. This paper presents various approaches aiming at efficient single or twin photons semiconductor sources. The emergence of these devices will be an important technological breakthrough in the field of quantum information. To cite this article: V. Berger, J.-M. Gérard, C. R. Physique 4 (2003).

  17. Flow Model Development for the Idaho National Laboratory OU 10-08 Sitewide Groundwater Model

    SciTech Connect

    Hai Huang; Swen Magnuson; Thomas Wood

    2005-09-01

    A two-dimensional (2D), steady-state groundwater flow model was developed for the Idaho National Laboratory (INL) sitewide groundwater model. A total of 224 wells inside the model domain were used to calibrate the 2D flow model. Three different calibration techniques, zonation approach, pilot point approach and coupled zonation/pilot point approach, were explored and applied during the model development. The pilot point approach allows modelers to model aquifer heterogeneities at various scales, and extract the maximum amount of data from available monitoring data, permitting the best possible representation of flow and transport at the INL.

  18. La Complexite de la Noetique en Mathematiques ou les Raisons de la Devolution Manquee.

    ERIC Educational Resources Information Center

    D'Amore, Bruno

    2003-01-01

    Inspired by the studies of pioneer Raymond, aims to redraw and make obvious the different hypotheses explaining missed devolvement. Supports research on the notions of concept and object in mathematics. (KHR)

  19. Egalite ou Realite: Where Do Muslims Truly Reside in Today’s France?

    DTIC Science & Technology

    2007-06-01

    and 57 Alfred Cobban, A History of Modern France Volume 1: 1715-1799. (Baltimore, MD: Penguin ...France Volume 2: 1799-1945. (Baltimore, MD: Penguin Books, 1961) details the military, social, and political exploits of the First Empire. 60...As early as 1798, during the Napoleonic expedition in Egypt, the emperor himself reflected on the challenges of integrating Muslim subjects into the

  20. Genuine modern analogues of Precambrian stromatolites from caldera lakes of Niuafo'ou Island, Tonga.

    PubMed

    Kazmierczak, Józef; Kempe, Stephan

    2006-03-01

    Calcareous or dolomitic, often secondarily silicified, laminated microbial structures known as stromatolites are important keys to reconstruct the chemical and biotic evolution of the early ocean. Most authors assume that cyanobacteria-associated microbialitic structures described from Shark Bay, Western Australia, and Exuma Sound, Bahamas, represent modern marine analogues for Precambrian stromatolites. Although they resemble the Precambrian forms macroscopically, their microstructure and mineralogical composition differ from those characterizing their purported ancient counterparts. Most Precambrian stromatolites are composed of presumably in situ precipitated carbonates, while their assumed modern marine analogues are predominantly products of accretion of grains trapped and bound by microbial, predominantly cyanobacterial, benthic mats and biofilms and only occasionally by their physicochemical activity. It has therefore been suggested that the carbonate chemistry of early Precambrian seawater differed significantly from modern seawater, and that some present-day quasi-marine or non-marine environments supporting growth of calcareous microbialites reflect the hydrochemical conditions controlling the calcification potential of Precambrian microbes better than modern seawater. Here we report the discovery of a non-marine environment sustaining growth of calcareous cyanobacterial microbialites showing macroscopic and microscopic features resembling closely those described from many Precambrian stromatolites.

  1. High explosive spot test analyses of samples from Operable Unit (OU) 1111

    SciTech Connect

    McRae, D.; Haywood, W.; Powell, J.; Harris, B.

    1995-01-01

    A preliminary evaluation has been completed of environmental contaminants at selected sites within the Group DX-10 (formally Group M-7) area. Soil samples taken from specific locations at this detonator facility were analyzed for harmful metals and screened for explosives. A sanitary outflow, a burn pit, a pentaerythritol tetranitrate (PETN) production outflow field, an active firing chamber, an inactive firing chamber, and a leach field were sampled. Energy dispersive x-ray fluorescence (EDXRF) was used to obtain semi-quantitative concentrations of metals in the soil. Two field spot-test kits for explosives were used to assess the presence of energetic materials in the soil and in items found at the areas tested. PETN is the major explosive in detonators manufactured and destroyed at Los Alamos. No measurable amounts of PETN or other explosives were detected in the soil, but items taken from the burn area and a high-energy explosive (HE)/chemical sump were contaminated. The concentrations of lead, mercury, and uranium are given.

  2. [Consultations in oncological supportive care mono-, multi-, ou interdisciplinary: What should we favour?].

    PubMed

    Garnier, Stéphanie Ranque; Pelletti, Caroline; Quenard, Christelle; Vallet, Fabienne; Lemoine, Patrick; Guastella, Virginie; Rhondali, Wadih

    2015-09-01

    According to the point 7.6 and 7.7 of the Cancer Plan 2014, all cancer patients should have access to supportive care. Indeed, the supportive care consultation in oncology is an important tool for the symptom management of cancer patients at all times of treatment. This consultation can be mono-disciplinary or multi-disciplinary (with different professions: physician, nurse, psychologist, social service assistant…) with or without integration (multidisciplinary or interdisciplinary). There are few studies focusing on the types of consultations (mono- or multidisciplinary) to promote based on their expected outcomes. After describing the different types of consultations (initial, follow-up, unscheduled, discharge) and having highlighted the main issues of these consultations, we will present the possible configurations. Our discussion will concern then the advantages and disadvantages of monodisciplinarity and different types of multidisciplinary highlighting the possible improvements. At the end of this work, after a brief synthesis of the different outcomes associated with each type of consultation, we would like to discuss the type of consultation to choose according to the outcomes.

  3. Mercury speciation modeling using site specific chemical and redox data from the TNXOD OU

    SciTech Connect

    Kaplan, D.I.

    2000-03-22

    The objective of this study was to evaluate mercury speciation under reducing conditions expected in sediments at the TNX Outfall Delta Operable Unit. These changes in speciation would then be used to infer whether mercury toxicity and mobility would be expected to be significantly altered under reducing conditions. The results from this work suggest that mercury would likely become more strongly retained by the solid phase under reducing conditions than under oxidizing conditions at the TNX Outfall Delta Site. Considering that experimental results indicate that mercury is extremely tightly bound to the solid phase under oxidizing conditions, little mercury mobility would therefore be expected under reducing conditions.

  4. Site-Specific Technical Report for Free Product Recovery Testing at OU-2, George AFB, California

    DTIC Science & Technology

    2007-11-02

    efficacy of the bioslurping technology for (1) recovery of LNAPL from groundwater and the capillary fringe, and (2) enhancing natural in situ degradation of petroleum contaminants in the vadose zone via bioventing .

  5. Moto del Sole intorno al baricentro del sistema solare

    NASA Astrophysics Data System (ADS)

    Piovan, Luciano; Milani, Franco

    2006-06-01

    The paper discusses the Sun's motion around the barycentre of the Solar System determined by the ever-changing dispositon of the planets over approximately 2000 years. Files of high-quality data taken from international sites were used in common personal computers. The Sun shows a repetitive behaviour, where an apocycle (ApC, decennial period in which the Sun moves very far from the barycentre) is followed by a pericycle (PeC, decennial period in which the Sun moves very near the barycentre) and by another ApC, etc. Periodicities exist in the short period (supercycles, SpC, lasting about 40 years and made of two sequences ApC-PeC, each lasting 20 years), in the mean period (phases comprising a sequence of 4 to 5 SpC, then lasting approximately 160 or 200 years respectively, mean value 180 years), and in the long period (hypercycles, IpC, consisting of two phases, lasting approximately 360 or 400 years). During one phase, the successive ApCs start opposed to each other in ecliptical coordinates and end nearly superimposed; during the following phase the ApCs start superimposed one over the other and end opposed to each other in ecliptical coordinates. The phase length, whose mean value is about 180 years, is very near the modulation of the maxima of the sunspot cycle (178.7 years). The periodicities found are modulated mainly by the alignment of Jupiter, or by both Jupiter and Saturn, with the Sun and the barycentre of the Solar System.

  6. The Mexican Sistema de Alerta Sismica (SAS) Experience

    NASA Astrophysics Data System (ADS)

    Espinosa-Aranda, J.; Rodriguez, F.

    2003-12-01

    The Mexico City's SAS is an Early Warning System developed in accordance with recommendations of foreign and national seismology experts, after the disaster generated in 1985 by the M8.1 Michoacan earthquake. The SAS aim is to help mitigate future seismic disasters in Mexico City (MC), mainly if the big forecast "Guerrero Earthquake" hits. In 1991 the SAS started its service in an experimental basis for evaluating its performance both with a group of basic education students in public schools, and with the emergency stop function for the Mexico City Metropolitan Subway System (METRO of MC); after this The Federal District Government (FDG) opened the SAS as a public service in August, 1993, shortly after the SAS warned, with more than 60 seconds of anticipation, the incoming effect of May 13, 1993, M5.8, and M6 double earthquake originated more than 300 Km from MC between Guerrero and Oaxaca, on the coast. That year, an initial technical flaw generated one false alert signal; the cause was readily corrected. The SAS has 12 seismic sensor stations covering a stripe close to 400 X 100 Km on the Guerrero's coast, between Papanoa and Punta Maldonado, that send information through a dedicated radio relay system to the SAS Central Control in MC., using the valuable support of some TELMEX field installations. Until August, 2003, the SAS sensor system has detected more than 1550 earthquakes in the 2.55 magnitude events, which are the ones felt in MC. The SAS has generated 57 warning signals with an average of 60 sec in advance to earthquake effects: 46 of restricted use for M<6, and 11 of public use for M>6 events. Public warnings have the automatic broadcast support of many commercial radio AM/FM and TV stations in Mexico City and Toluca valleys. The FDG controls the SAS signal service that includes the more frequent events (from M>5 up), asking the user to develop procedures and practice useful actions to mitigate seismic disasters. Each validated SAS seismic warning automatically generates and sends the event information by fax and e-mail to the DFG and Civil Protection Authorities, users and news media; it also sends information about the SAS operating conditions to service technicians, via radio, and phone.

  7. El enfoque de sistemas en programas de seguridad cuarentenaria

    Technology Transfer Automated Retrieval System (TEKTRAN)

    In a globalized world, the application of phytosanitary measures for quarantine by the producing countries is becoming more important as it facilitates access to key export markets for fruits and vegetables. Some of the problems currently encountered with quarantine treatments include, among others...

  8. Un sistema protoestelar a bajas frecuencias en radio

    NASA Astrophysics Data System (ADS)

    Peri, C. S.; Benaglia, P.; Martí, J.; Sánchez-Sutil, J. R.; Ishwara-Chandra, C. H.

    2016-08-01

    Stars form in the coolest and densest places of the Galaxy. Protostellar systems are very complex, have several components, produce a rich phenomenology and experiment very interesting physical processes to be studied. There exist a lot of similarities and differences between protostellar systems related to all the mass ranges. A common characteristic related to high--mass protostars is the detection of non--thermal synchrotron radio emission coming from the jets. One system that presents this kind of evidence is 165474247, called that way because of the infrared source on its center. This source has been observed and studied in several radio frequencies and modeled as possible generator of high-energy photons. We present radio maps of the Giant Metrewave Radio Telescope, of 1 deg, at 610 MHz, never reported before, with a noise level of mJy. We detected the entire system of 165474247, center and lobes, and other sources in the region. We name some of them and their counterparts.

  9. Momentos centrados en sistemas estelares a simetria axial.

    NASA Astrophysics Data System (ADS)

    Sanz Subirana, J.; Juan Zornoza, J. M.; Català Poch, M. A.

    Centered moments in the galactic plane have been analytically determined up to the fourth order for a non-stationary stellar system model with a distribution of peculiar velocities of the stars symmetric under point-axial transformations and equatorial plane reflexions. The obtained results explain satisfactorily the peculiar velocities distribution of the considered stellar samples in the solar neighborhood.

  10. EL Sistema CCD de Tonantzintla. Pruebas Y Planes Futuros

    NASA Astrophysics Data System (ADS)

    Cardona, O.; Chavira, E.; Furenlid, L.; Iriarte, B.

    1987-05-01

    We present results of the laboratory tests of the CCD camera system recently acquired by INAOE, also the theoretical and observational performance of the instrument with the one meter telescope of UNAM. The system has a TI 4849 CCD with 390 >c 584 pixels. We will present the future plans of its use in the new 2.1 m telescope at Cananea, onora.

  11. Etude experimentale de l'utilisation des revetements glaciophobes et/ou hydrophobes sur les pales d'eoliennes

    NASA Astrophysics Data System (ADS)

    Adomou, Maryelle C.

    2011-12-01

    Blade icing is a major problem of windmill use in northern climates. At present, the use of anti-icing protection on blades is little used because it is energy intensive and unsafe. An interesting current alternative is the use of ice-shedding coatings because they are proving to be less energy hungry, but their efficiency and durability have yet to be proven in windmills. Since windmills have a special dynamic structure and icing events can be of several types, an understanding of the accretion process on a variety of coatings is necessary to advance general knowledge in this field. To explore this problem, experiments were performed in the refrigerated wind tunnel at the Anti-icing Materials International Laboratory of the Universite du Quebec a Chicoutimi on a static-blade section covered with three commercial ice-shedding coatings chosen using well-defined criteria. Experimental conditions were based on several real extreme icing events. Scaling of the parameters of the icing events gave two air speeds for the wind tunnel (21 and 33m/s), two air temperatures (5 and -20°C) and one humidity level (0.4g/m 3). The experimental runs were carried out on blades covered with the coatings alone and also in combination with an electrothermal deicing system. The efficiency of the apparatus was evaluated by analysing the shape of the ice formed, the energy consumption of each anti-icing and de-icing combination and also by analysing the internal distribution of temperatures in the system. When used as a protective anti-icing system, none of the icephobic coatings was effective in reducing ice accumulation significantly on the blades. However, combined with an electrothermal anti-icing system, these types of coatings proved to be effective. Nevertheless, the power must be high enough to cause runoff. Hydrophobic coatings reduce energy consumption of electric anti-icing systems by about 7% whereas a super hydrophobic coating can reduce energy consumption by more than twice this amount. In de-icing mode and using a super hydrophobic coating, a reduction of 15% was recorded. These power reductions are largely due to the hydrophobic nature of the surfaces.

  12. Formation des adultes ou transformation des structures de l'entreprise (Manpower Development or the Transformation of Industrial Structures).

    ERIC Educational Resources Information Center

    Caspar, Pierre

    This action research study describes how the Centre Universitaire de Cooperation Economique et Sociale (CUCES) set up an initial instructor training program for senior engineers in a large French cement firm and eventually progressed toward overall organizational change. Beginning with research methodology and some practical problems encountered…

  13. Simulation d'un systeme de stockage saisonnier de glace pour la climatisation d'un batiment commercial ou institutionnel

    NASA Astrophysics Data System (ADS)

    Giraldo, Raul Alberto

    The principal goal of this study was to evaluate, using numerical simulation, the feasibility of an air conditioning system, supported by a seasonal ice storage system, installed in a commercial or institutional building. In this regard, the effects of changing several elements around the design of two possible scenarios were modeled in TRNSYS using Matlab® as a programming tool. In the first scenario, the air demanded inside the building passes directly through the ice storage system. In a second scenario, a closed loop pipe full of glycol transports the heat between the ice reservoir and an air cooling coil. First of all, the literature review shows some studies and earlier relevant applications, as well as different solving methods for moving boundary problems in a biphasic medium (waterice). Next, the heat load profile for a typical institutional building in Montreal is determined as a reference point using EE4 and three different methods of solving the boundary motion problem are compared for both, ice training and ice melting. Subsequently, the design parameters are presented for each scenario. This is followed by a description of the programming codes in Matlab® and the components that have been implemented in TRNSYS. Finally, the results involving the heat exchanged and the waterice boundary movements, among others, are collected for one year and for three years. The simulations of both scenarios have also included the experimental variation of some parameters such as the construction area for the ice reservoir, the duration of the ice melting period and other related physical variables. A final analysis of results was followed by an economic study, which considered the changes in initial investment and the potential energy savings for each scenario, compared with a traditional air conditioning unit. This showed that, although research is still needed on many improvements in the design of scenarios and whether its application is limited by several macroeconomic factors, a seasonal ice storage system is an appealing option in energy efficiency terms and it could potentially be, technically and ecologically, a good way to obtain energy savings.

  14. De la Langue a l'Eleve: Enseignement ou Apprentissage (From the Language to the Student: Teaching or Learning)

    ERIC Educational Resources Information Center

    Bautier-Castaing, Elisabeth

    1977-01-01

    A new stage of development in the methodology of language instruction is characterized by its recentering of teaching on the student and flexibility of method. In this context, several topics are addressed, including language as an instrument of communication and pedagogical consequences of the contributions of psycholinguistics. (Text is in…

  15. Results of the Survey of OU Students' Reading Skills. Text and Readers Programme Technical Report No. 3.

    ERIC Educational Resources Information Center

    Macdonald-Ross, Michael; Scott, Bernard

    A study investigated the reading skills of entering students at the Open University. Just over 2,000 of the 3,000 students (representing 10% of all students taking courses at the foundation level) completed questionnaires that were mailed to them. Subjects completed 3 cloze tests, graded in difficulty, and a vocabulary test. Results indicated that…

  16. Imagerie par contraste en reflexion ou transmission lors d'une procedure par laser au dioxyde de carbone

    NASA Astrophysics Data System (ADS)

    Bourdon, Alexandre

    The use of laser micromachining is now reaching maturity. Laser micromachining is now competing with traditional methods in procedures such as welding, cutting or melting. This thesis will focus on various aspects of the uses of laser in the industry. In each aspect we are drawing our attention on the method to image a given procedure in real-time. In this manuscript we are applying Maxwell's equations to describe the propagation of an electromagnetic wave across various interfaces between media. The approach is tantamount to using Fresnel equation by taking into account the thickness between two successive interfaces bounding a given medium. This theory becomes useful when investigating the evaporation of matter, welding of two dissimilar materials and etching at the surface of a substrate. The progression of welding and etching will be imaged in real-time using an effect of contrast. Various planes of observation that are available in our set-up will allow us to draw firm conclusions in real-time as the procedure develops. Using the principle of contrasting regions it was found that the progression of a laser procedure can be imaged and give interesting details as it evolves in time. It will be also possible to determine when it is time to stop the operation during a laser procedure when a substance evaporates on a substrate. In the case of a laser welding procedure, it will be shown that the imaging method can give some information about the quality of a weld between two different materials. Lastly, it will also be shown that we can image a laser etching procedure by using the contrast of reflectance in neighbouring regions.

  17. Using Television as a Unique Teaching Resource for OU Courses. I.E.T. Papers on Broadcasting No. 225.

    ERIC Educational Resources Information Center

    Salomon, Gavriel

    This discussion and critique of television programs used in two courses--D102 (vandalism) and M101 (mathematics)--at the British Open University suggests that the television presentation of real life-like raw material can facilitate the comprehension of abstract material inasmuch as it provides concrete illustrations, and provides an opportunity…

  18. Double diffusion, convection de Boussinesq et convection profonde en air atmosphérique pollué ou humide

    NASA Astrophysics Data System (ADS)

    Bois, Pierre-Antoine

    2006-11-01

    We derive the molecular diffusion equations, and we show how the determination of the molecular diffusion coefficients of passive scalars (pollutants or moisture) in the atmospheric air may be performed, in first approximation, by means of data of pressure, temperature and densities in the medium at the rest. These approximations are sufficient in order to write the equations of shallow convection (Boussinesq equations), whatever be the Brunt-Väisälä frequency of the medium (as well as in the troposphere and in the stratosphere). In the case of deep convection, which is possible in the troposphere only, the weakness of the Brunt-Väisälä frequency modifies the molecular diffusion equations, and these equations also modify the equations of convection. More accurate evaluations of the diffusion coefficients must also be made, using, for instance, static datas associated with several temperature distributions. To cite this article: P.-A. Bois, C. R. Mecanique 334 (2006).

  19. Structure de l'univers - quand l'observation guide la théorie... ou pas

    NASA Astrophysics Data System (ADS)

    Nazé, Yaël

    The scientific method is often presented, e.g. to children, as a linear process, starting by a question and ending by the elaboration of a theory, with a few experiments in-between. The reality of the building of science is much more complex, with back-and-forth motions between theories and observations, with some intervention of technology and randomness. This complex process is not always correctly understood and assimilated, even amongst scientists. The hero cult, mixed with some revisionism, still exists despite in-depth historical studies. In this context, it may be useful to comparatively examine the reaction to crucial observations, their interpretation and their impact on the contemporaneous theory development. Four examples are presented here, all linked to the question of the 'construction of the heavens' but at different epochs.

  20. Perles et saphirs ou comment parer votre expression francaise (Pearls and Sapphires or How to Embellish Your French Expression).

    ERIC Educational Resources Information Center

    Geno, Thomas H.

    1981-01-01

    Illustrates the pitfalls of French grammar and syntax by reproducing a student's composition, which mangles the language. Draws from similarly frustrating experiences and from a "New York Times" article entitled "The Fumble-rules of Grammar" to compile a list of "General Principles for the Improvement of Oral and Written French Expression." (MES)

  1. Direct method for measuring and witnessing quantum entanglement of arbitrary two-qubit states through Hong-Ou-Mandel interference

    NASA Astrophysics Data System (ADS)

    Bartkiewicz, Karol; Chimczak, Grzegorz; Lemr, Karel

    2017-02-01

    We describe a direct method for experimental determination of the negativity of an arbitrary two-qubit state with 11 measurements performed on multiple copies of the two-qubit system. Our method is based on the experimentally accessible sequences of singlet projections performed on up to four qubit pairs. In particular, our method permits the application of the Peres-Horodecki separability criterion to an arbitrary two-qubit state. We explicitly demonstrate that measuring entanglement in terms of negativity requires three measurements more than detecting two-qubit entanglement. The reported minimal set of interferometric measurements provides a complete description of bipartite quantum entanglement in terms of two-photon interference. This set is smaller than the set of 15 measurements needed to perform a complete quantum state tomography of an arbitrary two-qubit system. Finally, we demonstrate that the set of nine Makhlin's invariants needed to express the negativity can be measured by performing 13 multicopy projections. We demonstrate both that these invariants are a useful theoretical concept for designing specialized quantum interferometers and that their direct measurement within the framework of linear optics does not require performing complete quantum state tomography.

  2. Exploring Dephasing of a Solid-State Quantum Emitter via Time- and Temperature-Dependent Hong-Ou-Mandel Experiments

    NASA Astrophysics Data System (ADS)

    Thoma, A.; Schnauber, P.; Gschrey, M.; Seifried, M.; Wolters, J.; Schulze, J.-H.; Strittmatter, A.; Rodt, S.; Carmele, A.; Knorr, A.; Heindel, T.; Reitzenstein, S.

    2016-01-01

    We probe the indistinguishability of photons emitted by a semiconductor quantum dot (QD) via time- and temperature-dependent two-photon interference (TPI) experiments. An increase in temporal separation between consecutive photon emission events reveals a decrease in TPI visibility on a nanosecond time scale, theoretically described by a non-Markovian noise process in agreement with fluctuating charge traps in the QD's vicinity. Phonon-induced pure dephasing results in a decrease in TPI visibility from (96 ±4 )% at 10 K to a vanishing visibility at 40 K. In contrast to Michelson-type measurements, our experiments provide direct access to the time-dependent coherence of a quantum emitter on a nanosecond time scale.

  3. La Peur de L'évaluation: Évaluation de L'enseignement ou du Sujet?

    NASA Astrophysics Data System (ADS)

    Kosmidou-Hardy, Chryssoula; Marmarinos, Jean

    2001-03-01

    This article addresses first of all the question why nowadays evaluation is so intensively promoted. It then goes on to analyse the reasons why there is currently a resistance to evaluation among teachers. It refers especially to the situation in Greece, where evaluation has been absent since 1981, whereas before that date it was applied in an oppressive manner, more resembling discipline and punishment than the personal development of the teachers. The authors refer particularly to the work of Michel Foucault but also to that of J. F. Lyotard. They point out that it is the teachers' fear of evaluation of their personal identity rather than their professional competence that lies behind the resistance to evaluation. Emphasis is placed on the necessity to support teachers in their personal and professional development. The use of action research, termed "critical active research" in Greek, is advocated as a basic strategy for the development of the teacher as well as of the curriculum and of society in general.

  4. La conception de l'expérience scolaire aujourd'hui: Virage ou Évolution

    NASA Astrophysics Data System (ADS)

    Bordėleau, Louis-Gabriel

    1987-09-01

    The changes characterizing the conception and educational practices in the school environment nowadays are mainly manifest on the following three levels: the learner and his learning, the planning and implementation of school programmes and thirdly, the conception and practice of evaluation. These changes are strongly stimulated by the complex interaction of social, economic and technological transformations which are reshaping our present pluralistic society. The speed with which these social changes have taken place have forced the school to face two major challenges: firstly, to involve itself resolutely in decreasing the distance between school and society and secondly to define its own function in a more precise manner so as to take over its prescribed role of educational leadership in society. On the conceptional level with regard to the learner and the learning process, the author discerns an important tendency leading to a more integral vision. The sterile juxtapositioning of process and content is now being overcome. On the level of planning and implementation of school programmes several tendencies become apparent: the programmes tend to become more prescriptive and the school increases its stock of core subjects. These two tendencies try to integrate themselves in a policy of respect for individual differences. And finally it is recognized that the phase of implementation is of as critical importance if not more so than that of planning. The practices concerning evaluation seem at present to be influenced by recent social pressures demanding that the school provide education of greater quality which responds more adequately to the new challenges effected by a society in a state of tremendous evolution.

  5. Trali ou œdème pulmonaire lésionnel aigu post-transfusionnel: à propos d'un cas avec revue de la literature

    PubMed Central

    Serghini, Issam; Nader, Youssef; Qamouss, Youssef; Zoubir, Mohamed; Lalaoui, Jaafar Salim; Boughalem, Mohamed

    2015-01-01

    L’œdème pulmonaire lésionnel aigue transfusionnel est une complication classique de la transfusion de produits sanguins labiles, responsable de 17% des décès liés à la transfusion. Il s'agit d'un syndrome de détresse respiratoire aiguë post-transfusionnel qui se présente comme un œdème pulmonaire aigu non cardiogénique survenant dans les six heures suivant la mise en oeuvre d'une transfusion sanguine. Le mot Trali utilisé pour désigner cet œdème est l'acronyme de l'anglais « transfusion-related acute lung injury »; l'incidence des TRALI déclarés en France reste faible à cause de leurs méconnaissances, faute d'une définition précise tant au plan clinique qu'au plan étiologique. La sensibilisation des médecins à l'identification des TRALI et à la déclaration, notamment en réanimation, doit être poursuivie. Des données récentes ont souligné sa relative fréquence et des études cliniques et biologiques plus attentives ont contribué à une meilleure compréhension de ses mécanismes dont deux sont bien défini: un conflit immunologique d'une part, une activation des polynucléaires neutrophiles par des facteurs lipidiquesd'autre part. Il est également admis que le Trali ne se déclenche que dans un contexte favorisant dont le substratum commun pourrait essentiellement être une leucostase préalable. Le traitement du Trali est celui des œdèmes pulmonaires lésionnels, oxygénothérapie et assistance respiratoire. Nous rapportons un cas de Trali survenu à la suite de la transfusion de 08 concentrés de globules rouges chez un jeune homme de 26 ans. PMID:26379812

  6. Footpaths: Fusion of mObile OuTdoor Personal Advisor for walking rouTe and Health fitnesS.

    PubMed

    Waluyo, Agustinus Borgy; Pek, Isaac; Yeoh, Wee-Soon; Kok, Tian Shiang; Chen, Xiang

    2009-01-01

    This paper is mainly concerned with the integration of wireless body sensor network and walking route navigation system in order to provide the most suitable walking path to the wearer following the wearer's health condition. A novel system called Footpaths is proposed. Footpaths is designed to facilitate the measurement of the user's cardio-respiratory fitness level (CRF), through the use of a wearable wireless sensor network, in which the result is used as a key factor in determining the most suitable walking route. The CRF is assessed based on the maximal oxygen uptake or VO2max through field performance tests (i.e. Rockport 1-mile test). The prototype of Footpaths and showcase of its effective uses are exhibited in the paper.

  7. Tomorrow's Families: Triumph of the Individual or Sharing the Caring? (Les familles de demain: Triomphe de l'individu ou partage des soins a donner?).

    ERIC Educational Resources Information Center

    Theilheimer, Ish, Ed.

    1993-01-01

    This theme issue of the Canadian newsletter "Transitions" in both English and French explores the question of the future of families in a period of broken marriages, difficult times, and an obsession with individual success and materialism. "Families of the Future: New Ways to Do the Same Old Things," summarizes the findings of…

  8. Assimilation of SMOS soil moisture into a distributed hydrological model and impacts on the water cycle variables over the Ouémé catchment in Benin

    NASA Astrophysics Data System (ADS)

    Leroux, Delphine J.; Pellarin, Thierry; Vischel, Théo; Cohard, Jean-Martial; Gascon, Tania; Gibon, François; Mialon, Arnaud; Galle, Sylvie; Peugeot, Christophe; Seguis, Luc

    2016-07-01

    Precipitation forcing is usually the main source of uncertainty in hydrology. It is of crucial importance to use accurate forcing in order to obtain a good distribution of the water throughout the basin. For real-time applications, satellite observations allow quasi-real-time precipitation monitoring like the products PERSIANN (Precipitation Estimation from Remotely Sensed Information using Artificial Neural Networks, TRMM (Tropical Rainfall Measuring Mission) or CMORPH (CPC (Climate Prediction Center) MORPHing). However, especially in West Africa, these precipitation satellite products are highly inaccurate and the water amount can vary by a factor of 2. A post-adjusted version of these products exists but is available with a 2 to 3 month delay, which is not suitable for real-time hydrologic applications. The purpose of this work is to show the possible synergy between quasi-real-time satellite precipitation and soil moisture by assimilating the latter into a hydrological model. Soil Moisture Ocean Salinity (SMOS) soil moisture is assimilated into the Distributed Hydrology Soil Vegetation Model (DHSVM) model. By adjusting the soil water content, water table depth and streamflow simulations are much improved compared to real-time precipitation without assimilation: soil moisture bias is decreased even at deeper soil layers, correlation of the water table depth is improved from 0.09-0.70 to 0.82-0.87, and the Nash coefficients of the streamflow go from negative to positive. Overall, the statistics tend to get closer to those from the reanalyzed precipitation. Soil moisture assimilation represents a fair alternative to reanalyzed rainfall products, which can take several months before being available, which could lead to a better management of available water resources and extreme events.

  9. Aspects épidémiologique, clinique et anatomopathologique du mélanome CHU Yalgado Ouédraogo de Ouagadougou (Burkina Faso)

    PubMed Central

    Korsaga-Somé, Nina; Zongo, Nayi; Ouangré, Edgar; Tapsoba, Patrice; Ouédraogo, Muriel Sidnomam; Ilboudo, Léopold; Bassolet, Alban; Sanou, Maryam; Djimtibaye, Djounitana; Barro-Traoré, Fatou; Niamba, Pascal; Traoré, Adama

    2015-01-01

    Le mélanome est une tumeur maligne développée aux dépens des mélanocytes. Ses caractéristiques épidémiologiques restent peu étudiées dans les populations africaines. D'où le but de cette étude. Il s'est agit d'une étude rétrospective descriptive de janvier 2009 à décembre 2012 et prospective en 2013. Pour la partie rétrospective, nous avons inclus tous les patients atteints de mélanome confirmé par l'examen histopathologique et ayant un dossier clinique exploitable. Pour la partie prospective, nous avons inclus tous les cas de mélanomes recensés en 2013. Les variables étudiées étaient les caractéristiques sociodémographiques, anatomocliniques et thérapeutiques. Au total 19 patients étaient inclus, avec un âge médian de 53,42 ans et 10 patients de sexe féminin. La durée moyenne d’évolution de la maladie était de 3,7 ans. Les lésions étaient surtout ulcero-bourgeonnantes (13), hyperpigmentées (15), et siégeaient sur les plantes (14). Le type et acro-lentigineux était le plus fréquent (13). L'indice de Clarck a été mesuré dans 3 cas, l'indice de Breslow dans aucun cas. Les métastases étaient présentes chez 10 patients. Le traitement était surtout chirurgical. Les 11 patients inclus de manière retrospective étaient ont été perdus de vue. Un décès était noté parmi les 8 patients inclus de manière prospective. Le retard à la consultation semblait être le principal facteur de mauvais pronostic dans notre contexte. Une sensibilisation de la population et du personnel de santé sur les signes précoces de la maladie, permettrait probablement de réduire la morbidité. PMID:26113951

  10. Operational Medical Issues in Hypo-and Hyperbaric Conditions (les Questions medicales a caractere oprationel liees aux conditions hypobares ou hyperbares)

    DTIC Science & Technology

    2001-06-01

    niveau du conduit auditif externe proche du tympan au niveau d’un capteur , - L’échappement par une fuite calibrée du volume d’air en excés induit par...activant naturellement la commande de gonflement du harnais. Pour l’évaluation, l’équipement est positionné de façon à reproduire la disposition réelle

  11. [Gynecology-obstetrics at the Yalgado-Ouédraogo (Ouagadougou) National Hospital Center. Cancer of the cervix uteri: epidemio-clinical and anatomopathologic aspects].

    PubMed

    Lankoandé, J; Sakandé, B; Ouédraogo, A; Ouédraogo, C M; Ouattara, T; Bonané, B; Koné, B

    1997-01-01

    We report the findings of a 3-year retrospective study aimed at describing the epidemiological, clinical, anatomical and pathological profile of cervical cancers in an African country. We studied 46 cases of invasive cervical cancer. This type of cancer accounts for 31.7% of female genital cancers. The mean waiting time for a consultation was 7 +/- 2.4 months. The average age of the patients was 48 +/- 3.7 years. They were mostly women who had had several pregnancies without paid work. The main reasons for seeking medical help were metrorrhagia (95.6%), pelvic pain (58.7%) and purulent discharge (45.6%). In 89.1% of the cases, the cancer was inoperable. Pathology results were available in 37 cases. We found 36 cases (97.3%) of epidermoid carcinoma and a single case (2.7%) of adenocarcinoma. There were associated condylomatous lesions in 21.6% of cases. These results demonstrate the importance of making cervical smear tests a routine part of medical examination and of making the public aware of the importance of screening for cervical cancer.

  12. La carence en vitamine D chez l'adulte au Gabon: cas isolé ou problème méconnu?

    PubMed Central

    Ntyonga-Pono, Marie-Pierrette

    2014-01-01

    La carence en vitamine D chez l'adulte est un sujet d'actualité à cause de ses multiples effets et de son extension de par le monde. Cependant elle est peu explorée au Gabon et en Afrique centrale en général. Le but de cet article qui rapporte trois cas documentés de carence en vitamine D chez l'adulte au Gabon, est d'attirer l'attention sur l'existence de ce problème même en zone équatoriale ensoleillée. Vu les implications de cette carence dans diverses pathologies osseuses, cardio-vasculaires, métaboliques, infectieuses, auto-immunes, néoplasiques..., des recherches plus approfondies sont nécessaires pour cerner le problème et prendre des mesures appropriées. PMID:25815104

  13. Image et Langage, ou Comment ne pas Parler avec des Images (Image and Language, or How Not to Speak with Images)

    ERIC Educational Resources Information Center

    Jacquinot, Genevieve

    1974-01-01

    This article discusses the relationship of the audiovisual method to the instruction of French, especially the audiovisual image as a sign which encourages cognitive development an therefore linguistic development. (Text is in French.) (AM)

  14. "O Ensaio como Forma" ou Um Ensaio acerca da Teoria Critica da Sociedade ("The Essay as Form" or An Essay about the Critical Theory of Society).

    ERIC Educational Resources Information Center

    Giordano, Rosely

    2000-01-01

    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…

  15. Du texte au texte: Ou l'on dit ce qu'il faut faire (From Text to Text: Where One Is Told What to Do).

    ERIC Educational Resources Information Center

    Bertocchini, Paola; Costanzo, Edwige

    1991-01-01

    A variety of authentic materials drawn from explanatory texts or offering instructions for performing some daily or common task are presented, and classroom activities for building foreign language competence based on the materials are outlined. (MSE)

  16. Maturation syntaxique chez le jeune enfant (9-36 mois): Continuite ou rupture (Syntactic Maturation in the Young Child [9-36 Months]: Continuity or Rupture)?

    ERIC Educational Resources Information Center

    Konopczynski, Gabrielle

    2001-01-01

    This article deals with an important question in the area of developmental psycholinguistics. It studies the conditions for a presyntactcic utterance to become a "canonical sentence" or "canonical utterance" at the stage of the two-word combinations. Two main points are highlighted: (1) how a prelinguistic utterance between 9-12 months of age can…

  17. Une reevaluation de l'evaluation ou "Le coucou dans le nid" (A Critical Look at Evaluation Methods or "The Cuckoo in the Nest").

    ERIC Educational Resources Information Center

    Roe, Peter J.

    1981-01-01

    Discusses the fundamental principles of evaluation to show that the conventional approaches to testing have led to a situation where procedure requirements overshadow the objectives of the learning process. Advocates instruments that address realistic communication goals and states criteria based on the learner's need for continous, constructive…

  18. Les notions floves en droit ou l'economie de l'imprecision (Fuzzy Notions in Law or the Economy of Imprecision).

    ERIC Educational Resources Information Center

    Mackaay, Ejan

    1979-01-01

    Proposes the theory that the "semantic fluidity" of legal terminology, far from being an obstacle to the carrying out of the law, is essential to the functioning of the executive, legislative, and judicial branches in a cost-effective manner. (AM)

  19. What Feynman Could Not yet Use: The Generalised Hong-Ou-Mandel Experiment to Improve the QED Explanation of the Pauli Exclusion Principle

    ERIC Educational Resources Information Center

    Malgieri, Massimiliano; Tenni, Antonio; Onorato, Pasquale; De Ambrosis, Anna

    2016-01-01

    In this paper we present a reasoning line for introducing the Pauli exclusion principle in the context of an introductory course on quantum theory based on the sum over paths approach. We start from the argument originally introduced by Feynman in "QED: The Strange Theory of Light and Matter" and improve it by discussing with students…

  20. Performances comparées des machines à aimants et à réluctance variable. Maximisation du couple massique ou volumique

    NASA Astrophysics Data System (ADS)

    Matt, D.; Llibre, J. F.

    1995-10-01

    The subject of this article is to compare the performances of electrical machines using three different principles of functioning which are recently exploited. We consider possibilities to realise actuators with high torque and power per unit of mass for direct drive applications. The three different machines involved in the comparison are: (i) the classical synchronous structure with permanent magnets in the inductor, (ii) the vernier reluctance structure, (iii) the vernier reluctance structure with permanent magnets. To allow a good comparison, the architecture of those three motors has to be identical, particularly the shape of the main elements. L'objet de cet article est de comparer directement, pour la première fois à notre connaissance, les performances de machines électriques mettant en oeuvre trois principes de fonctionnement différents, très récemment exploités. Nous examinons les possibilités de réalisation d'actionneurs à fort couple et puissance massique élevée, pour des applications d'entraînement direct, conçus à partir soit d'une structure synchrone classique utilisant des aimants pour l'inducteur, soit d'une structure à réluctance variable vernier soit, enfin, d'un dispositif combinant l'effet de réluctance variable à l'utilisation d'aimants. Pour permettre une comparaison réellement directe, l'architecture des trois moteurs exploitant les concepts évoqués, ainsi que la forme de leurs principales pièces, seront pratiquement identiques.

  1. Ecole et Comportement: Session de formation ou de perfectionnement sur l'intervention au secondaire (School and Behavior: Preservice or Inservice Training on Intervention at the Secondary Level).

    ERIC Educational Resources Information Center

    Audet, Danielle; And Others

    A 2-day training session on interventions for use with secondary students who have behavior problems is presented. The first section is a participant's workbook, which contains 23 training activities. For each activity, the workbook indicates the relevant section of a companion guide "Ecole et Comportement: Un Guide d'Intervention au…

  2. Time series geophysical monitoring of permanganate injections and in situ chemical oxidation of PCE, OU1 area, Savage Superfund Site, Milford, NH, USA

    USGS Publications Warehouse

    Harte, Philip T.; Smith, Thor E.; Williams, John H.; Degnan, James R.

    2012-01-01

    In situ chemical oxidation (ISCO) treatment with sodium permanganate, an electrically conductive oxidant, provides a strong electrical signal for tracking of injectate transport using time series geophysical surveys including direct current (DC) resistivity and electromagnetic (EM) methods. Effective remediation is dependent upon placing the oxidant in close contact with the contaminated aquifer. Therefore, monitoring tools that provide enhanced tracking capability of the injectate offer considerable benefit to guide subsequent ISCO injections. Time-series geophysical surveys were performed at a superfund site in New Hampshire, USA over a one-year period to identify temporal changes in the bulk electrical conductivity of a tetrachloroethylene (PCE; also called tetrachloroethene) contaminated, glacially deposited aquifer due to the injection of sodium permanganate. The ISCO treatment involved a series of pulse injections of sodium permanganate from multiple injection wells within a contained area of the aquifer. After the initial injection, the permanganate was allowed to disperse under ambient groundwater velocities. Time series geophysical surveys identified the downward sinking and pooling of the sodium permanganate atop of the underlying till or bedrock surface caused by density-driven flow, and the limited horizontal spread of the sodium permanganate in the shallow parts of the aquifer during this injection period. When coupled with conventional monitoring, the surveys allowed for an assessment of ISCO treatment effectiveness in targeting the PCE plume and helped target areas for subsequent treatment.

  3. Time series geophysical monitoring of permanganate injections and in situ chemical oxidation of PCE, OU1 area, Savage Superfund Site, Milford, NH, USA.

    PubMed

    Harte, Philip T; Smith, Thor E; Williams, John H; Degnan, James R

    2012-05-01

    In situ chemical oxidation (ISCO) treatment with sodium permanganate, an electrically conductive oxidant, provides a strong electrical signal for tracking of injectate transport using time series geophysical surveys including direct current (DC) resistivity and electromagnetic (EM) methods. Effective remediation is dependent upon placing the oxidant in close contact with the contaminated aquifer. Therefore, monitoring tools that provide enhanced tracking capability of the injectate offer considerable benefit to guide subsequent ISCO injections. Time-series geophysical surveys were performed at a superfund site in New Hampshire, USA over a one-year period to identify temporal changes in the bulk electrical conductivity of a tetrachloroethylene (PCE; also called tetrachloroethene) contaminated, glacially deposited aquifer due to the injection of sodium permanganate. The ISCO treatment involved a series of pulse injections of sodium permanganate from multiple injection wells within a contained area of the aquifer. After the initial injection, the permanganate was allowed to disperse under ambient groundwater velocities. Time series geophysical surveys identified the downward sinking and pooling of the sodium permanganate atop of the underlying till or bedrock surface caused by density-driven flow, and the limited horizontal spread of the sodium permanganate in the shallow parts of the aquifer during this injection period. When coupled with conventional monitoring, the surveys allowed for an assessment of ISCO treatment effectiveness in targeting the PCE plume and helped target areas for subsequent treatment.

  4. Time series geophysical monitoring of permanganate injections and in situ chemical oxidation of PCE, OU1 area, Savage Superfund Site, Milford, NH, USA

    NASA Astrophysics Data System (ADS)

    Harte, Philip T.; Smith, Thor E.; Williams, John H.; Degnan, James R.

    2012-05-01

    In situ chemical oxidation (ISCO) treatment with sodium permanganate, an electrically conductive oxidant, provides a strong electrical signal for tracking of injectate transport using time series geophysical surveys including direct current (DC) resistivity and electromagnetic (EM) methods. Effective remediation is dependent upon placing the oxidant in close contact with the contaminated aquifer. Therefore, monitoring tools that provide enhanced tracking capability of the injectate offer considerable benefit to guide subsequent ISCO injections. Time-series geophysical surveys were performed at a superfund site in New Hampshire, USA over a one-year period to identify temporal changes in the bulk electrical conductivity of a tetrachloroethylene (PCE; also called tetrachloroethene) contaminated, glacially deposited aquifer due to the injection of sodium permanganate. The ISCO treatment involved a series of pulse injections of sodium permanganate from multiple injection wells within a contained area of the aquifer. After the initial injection, the permanganate was allowed to disperse under ambient groundwater velocities. Time series geophysical surveys identified the downward sinking and pooling of the sodium permanganate atop of the underlying till or bedrock surface caused by density-driven flow, and the limited horizontal spread of the sodium permanganate in the shallow parts of the aquifer during this injection period. When coupled with conventional monitoring, the surveys allowed for an assessment of ISCO treatment effectiveness in targeting the PCE plume and helped target areas for subsequent treatment.

  5. Pour Savoir ou vous en etes. Evaluez vous-meme vos connaissances (Knowing Where You Are. Evaluate Your Knowledge by Yourself).

    ERIC Educational Resources Information Center

    Aiello, Angelo; And Others

    1986-01-01

    A form is presented for language teacher self-evaluation concerning attitudes and knowledge about learning theories, general linguistics, sociolinguistics, pragmatics, discourse analysis, teaching methodology, the communicative approach, class activities, class management, instructional support, and evaluation. (MSE)

  6. Missile Interceptor Guidance System Technology (La Technologie Pour Les Systemes De Guidage Des Missiles Intercepteurs (DE Missiles Ou D’Aeronefs)

    DTIC Science & Technology

    1990-01-01

    and polarization attenuation (for passive or semiactive systems). BANK-TO-TURN CONTROL The goal of the pure BTT control law is to roll the the missile... analyisis . This can be used for comparisons between architectures and for finding the parameters of the lowest cost point design that satisfies a given

  7. Pseudo-HELLP syndrome par carence en folates et/ou en vitamine B12: à propos d'un cas

    PubMed Central

    Benali, Mechaal; Bouassida, Mahdi; Dhouib, Firas; Bouzeidi, Kaled

    2014-01-01

    Plusieurs pathologies médicales peuvent interférer avec la grossesse et mimer le tableau biologique de HELLP syndrome. L’évolution naturelle de ce syndrome est d'une particulière gravité pour la mère et le fœtus, il convient d’éliminer rapidement les autres diagnostics afin d’éviter une extraction fœtale prématurée injustifiée. Nous rapportons le cas d'une parturiente qui s'est présentée avec un tableau évocateur d'un HELLP syndrome, rapporté finalement à une carence en folates et en vitamine B12. PMID:25404961

  8. Sistemas exoplanetarios múltiples: estadísticas y clasificación

    NASA Astrophysics Data System (ADS)

    Hobson, M. J.; Gómez, M.

    2015-08-01

    459 multiplanet systems are currently known, of which 50 possess four or more planets. We present statistical analyses of the physical properties of both the host stars and the planets, and of the orbital configurations of these systems. We devote special attention to the 50 most populated systems, performing a metallicity analysis of the host stars, and a measure of the compactness of each system. We investigate if the planets are ordered preferentially by size in their systems. We analyse the diversity of the known multiplanet systems with relation to the Solar System.

  9. Avances en la formación de los planetas gigantes del sistema solar

    NASA Astrophysics Data System (ADS)

    Guilera, O. M.; Fortier, A.; Brunini, A.; Benvenuto, O. G.

    In the framework of the "Nice model", we compute the formation of the solar system giant planets by concurrent accretion of solids and gas, and study the dependence of this process on the surface profile of the protoplan- etary disk and the size distribution of the accreted planetesimals. We focus on the conditions that lead to the simultaneous formation of two massive cores, corresponding to Jupiter and Saturn, which should be able to reach the cross-over mass (where the mass of the envelope equals the mass of the core, and gaseous runway starts), while two other cores should be able to grow up to Uranus and Neptune's current masses. We find that the si- multaneous formation of the giant planets is favored by flat surface density profiles and by the accretion of relatively small planetesimals. FULL TEXT IN SPANISH

  10. Il sistema multiplo di Spica osservato dal Padre Giovanni Battista Audiffredi nel 1753

    NASA Astrophysics Data System (ADS)

    Sigismondi, Costantino

    2005-06-01

    The multiplicity of Spica's system has been first observed in 1753 by the dominican father Giovanni Battista Audiffredi through a lunar occultation. Audiffredi noted that the emersion's duration from the bright lunar limb was not instantaneous. Nowadays Spica has five known components, four of them have been discovered by occultation. This observation is presented along with a general introduction of lunar occultations, Watts' profiles, Cassini regions and grazes.

  11. Distribución de planos orbitales de sistemas binarios en la Galaxia

    NASA Astrophysics Data System (ADS)

    Weidmann, W. A.; Díaz, R. J.

    In this work we study the orientations of the orbital planes of visual binary stellar systems. This analysis was carried out on a certain region of the sky, where we found a peculiar distribution of the position angles of elongated planetary nebulae. The distribution of the orientations of binary systems towards the galactic center shows some non-random characteristics, although the number of objects studied is not enough to conclude about the relationship between orientations of the planetary nebulae and the population of visual binary stellar systems studied.

  12. Evolución de estrellas que pertenecen a sistemas binarios cerrados

    NASA Astrophysics Data System (ADS)

    De Vito, M. A.; Benvenuto, O. G.

    Stellar evolution in close binary systems (CBSs, those in which one or more mass transfer/mass loss episodes can occur) is a topic of great interest in Astronomy. The reason is that a large fraction of the stars belong to CBSs and this has originated our interest for the study of such systems. Based on the stellar evolution code for isolated stars developed in the Facultad de Ciencias Astronómicas y Geofísicas (UNLP) by Dr. O.G. Benvenuto, we have built a new code that can compute the evolution of stars members of CBSs. The version of the code we have employed in performing the calculations we show in this work, make a great advance in the study of this kind of systems, since the rate of mass loss is computed in an self-consistent fashion. For this purpose, we have incorporated in the code for isolated stars a new variable in the iterations: the rate of mass loss dot{M}. In addition, we need to compute a critical radius that discern if the star is lossing mass or not. Based on the experience of other authors we have defined the radius of the Roche lobe as a critical radius in such a way that if the stellar radius overflows this, mass loss will occur. On the other hand, if the stellar radius is smaller, the evolution proceeds as if the star were isolated. If all mass lost from a star is deposited on the surface of its companion, and total systemic energy is conserved we have a conservative case. However, we have included in our code effects of energy loss for ejection of matter from the system, and consider dissipative effects like gravitational radiation and magnetic braking. This considerations causes different results from conservative case. Inasmuch as, in view of the non conservation of total angular momentum, it is necessary to perform a careful calculation of the orbital evolution. We present the evolution of four primary stars (the initially more massive star in the systems) with the following characteristics: - Initial masses of 1.5 and 2 M⊙, initial period of 0.7 days, and initial mass ratio of 1.5. Case A (mass transfer begin during core hydrogen burning), non conservative. - Initial masses of 2 and 1.4 M⊙, initials periods of 1.5 and 1 days, initial mass ratios of 1.5 and 1, respectively. Case B (mass transfer begin during central contraction after central hydrogen exhaustion), non conservative. We have also shown the results obtained with a version of the code, in preparation, that performs the evolution for both stars belonging to a CBS simultaneously. It is a CBS in which the initial mass of the primary is 10 M⊙, the initial period of 6 days and the initial mass ratio of 1.25. Case B, conservative.

  13. Una guia a los padres acerca del sistema educacional = A Parent's Guide to Education. Spanish Edition.

    ERIC Educational Resources Information Center

    Rowch, Nancy

    A guide for Spanish-speaking parents of elementary and secondary school students in Nebraska provides in Spanish, and then in English, information concerning education in the state. Topics covered include: state policy concerning enrolling children in school, medical requirements for enrollment and attendance, the school curriculum requirements…

  14. Curso Introductorio sobre el Sistema DIALOG (Introductory Course on the DIALOG System).

    ERIC Educational Resources Information Center

    Rodriguez, Ketty

    As an introduction to the use of the DIALOG online retrieval service, this guide presents material that was developed during a fellowship at Carlos III University, School of Library Science and Documentation, Madrid (Spain) and that is based on a course on the same subject taught in English at Texas Women's University. Although the use of DIALOG…

  15. The Solar System/El Sistema Solar--A Fully Integrated Instructional Unit.

    ERIC Educational Resources Information Center

    Van Heukelem, Tom; Mercado, Maria de Jesus

    This lesson plan for the second grade uses information on the solar system to provide science education for limited-English-proficient (LEP) students in San Diego, California. The lesson has been developed to be taught in a bilingual class, a Spanish-language immersion class, or a two-way bilingual class. Lessons are arranged so that native…

  16. Portulano frente a Landsat: Dos sistemas de georreferenciacion para el Estrecho de Gibraltar

    NASA Astrophysics Data System (ADS)

    Barranco Molina, Carlos

    The purpose of this research is to study and an compare two different images of the same area, from geographical, topographical and historical perspectives. The main differences between them are the temporal localization and the techniques and tools required in the process of getting both images. One of them is a 17th century map and the other is a contemporary satellite image. Any cartographical document would be expected to be precise, exact and cutting edge thanks to the application of the new technologies to cartography, geodesy and computing. The document can therefore be considered as insuperable and definitive. In this context, this research is a starting point for my future doctoral dissertation which will deal with the importance of the portulano maps in the Scientific Revolution of the 15th and 16 th century.

  17. Sistemas Eolicos Pequenos para Generacion de Electricidad; Una guia para consumidores en los EE.UU.

    SciTech Connect

    Not Available

    2007-09-01

    This Spanish version of the popular Small Wind Electric Systems: A U.S. Consumer's Guide provides consumers with information to help them determine whether a small wind electric system can provide all or a portion of the energy they need for their home or business based on their wind resource, energy needs, and economics. Topics include how to make a home more energy efficient, how to choose the correct turbine size, the parts of a wind electric system, how to determine whether enough wind resource exists, how to choose the best site for a turbine, how to connect a system to the utility grid, and whether it's possible to become independent of the utility grid using wind energy. In addition, the cover of the guide contains a list of contacts for more information.

  18. Sistemas Eolicos Pequenos para Generacion de Electricidad: Una guia para consumidores en Nuevo Mexico

    SciTech Connect

    Not Available

    2007-09-01

    This Spanish version of the popular Small Wind Electric Systems: A New Mexico Consumer's Guide provides consumers with information to help them determine whether a small wind electric system can provide all or a portion of the energy they need for their home or business based on their wind resource, energy needs, and economics. Topics include how to make a home more energy efficient, how to choose the correct turbine size, the parts of a wind electric system, how to determine whether enough wind resource exists, how to choose the best site for a turbine, how to connect a system to the utility grid, and whether it's possible to become independent of the utility grid using wind energy. In addition, the cover of the guide contains a list of contacts for more information.

  19. Investigacion Participativa y Gestion de Sistemas Educativos. (Participatory Research and the Management of Educational Systems).

    ERIC Educational Resources Information Center

    Valle, Victor M.

    Elements which, when put in harmony, might generate powerful tools for social change and educational development are (1) the ever present need of the educational systems to evaluate their performance; (2) the universal acceptance of the life-long education concept as a major guideline to design educational programs; (3) the trend toward a…

  20. Sistemas binarios viuda negra: conectando sus orígenes con su estado final

    NASA Astrophysics Data System (ADS)

    Benvenuto, O. G.; De Vito, M. A.; Horvath, J. E.

    ``Black widow'' systems are located in a well determined region of the plane (where is the mass of the pulsar companion and is the orbital period of the system). An attempt has been made to understand which are the mechanisms that lead to companions of ``black widows'' to be located in this region; since standard binary evolution does not provide a satisfactory response. From our evolutionary calculations; we study the path performed in the plane by a binary system to reach the state of ``black widow''. We also discuss whether there is a connection between ``redbacks'' and ``black widows''. FULL TEXT IN SPANISH

  1. Crecimiento adiabático de un agujero negro en el centro de un sistema estelar

    NASA Astrophysics Data System (ADS)

    Arrigoni, M.; Carpintero, D. D.

    We present preliminary results on the dynamical influence of an adiabatically grown central black hole upon its surroundings. Young (1980), in his pioneer work, found an r-3/2 density profile for the neighborhood of a black hole, a result not confirmed by observation. In this work, we extend Young's result to a more realistic case, namely an inhomogeneous galactic center, although keeping the spherical symmetry hypothesis, in order to verify whether the final density profile changes.

  2. Sintesis y caracterizacion de portadores magneticos coloidales. Aplicaciones al diseno de sistemas de liberacion de farmacos

    NASA Astrophysics Data System (ADS)

    Gomez Lopera, Salvador Angel

    2003-10-01

    The present work is mainly dedicated to the synthesis and characterization of composite colloidal particles with a magnetic core (magnetite) and a polymeric biodegradable material shell (poly(DL-lactide), PLA). The aim is to use them as drug carrier systems in the field of controlled (or modified) release. The appropriate synthesis conditions are analyzed for such purpose, starting with the synthesis of the magnetic nuclei, and continuing with that of microspheres of the polymer used later as shell material. The final step is the manufacture of the composite colloids. In order to have a good comparison, all the experiments of the work have been run in triplicate, that is, for the three individual materials (magnetic nuclei, PLA and composite particles magnetite/PLA) and all the discussions are presented by way of parallel study of the three colloidal systems. The following surface and bulk properties have been studied: shape and size of the particles, specific surface area, chemical composition. The magnetic behavior of the nuclei is characterized, as well as that of the composite particles, through measurement of the magnetic susceptibility and the hysteresis cycles. In addition, a study of the electrokinetic behavior of the systems as a function of pH---at constant ionic strength---has been complemented by an investigation of their surface thermodynamics to check the extent of coverage achieved. Very significant results were also obtained in the analysis of the stability of the suspensions. Since our final aim was the design of a drug carrier and controlled release system, we also present a series of preliminary results concerning the effect of the glucocorticoid betamethasone 21-phosphate sodium salt on the surface electrical properties of the three kinds of particles, observing clear differences between the behavior of magnetite particles and of composite or pure polymeric colloids. It is demonstrated that the polymer layer affects considerably the capacity of the colloid for adsorbing this drug and, probably, other drugs of interest in the treatment of those pathologies in which one needs an elevated local concentration of any therapeutic product but without adverse side effects, like those used in the chemotherapy of the solid tumors.

  3. Coexistencia e integracion de comunicaciones inalambricas en sistemas de transmision opticos

    NASA Astrophysics Data System (ADS)

    Perez Soler, Joaquin

    Current network and telecommunication systems are required to provide higher data rates in access networks to an increasing number of users. This fact is mainly due to the increase in the Internet traffic data, which is related with the higher demand of online videogames and software, the increased complexity in the content of web pages, the joint distribution of audio-visual and added-value online content, and the introduction of high-definition services and contents such as video on demand, as a result of a society increasingly more interconnected. In order to satisfy these higher data rates requirements, new techniques for the joint distribution of several wireless communication systems are proposed in this Thesis. The aim of these techniques is to facilitate the deployment of an integrated access network at the customer premises, enabling the integration of optical transmission over an optical access network and radio-frequency transmission in the same infrastructure. Two main wireless communication systems are considered in this Thesis, WiMAX (Worldwide Interoperability for Microwave Access) and UWB (Ultra-Wide Band) according to WiMedia Alliance recommendation. Comparing the bit rate and expected range, WiMAX and UWB are complementary radio technologies expected to coexist in a near future in integrated access networks. The optical access network considered in this Thesis can be regarded as a FTTH network (Fibre-to-the-Home). The wireless signals are natively transmitted over optical network, that is, without frequency upconversion and remodulation stages, over one or several optical carriers. This technology, which is known as Radio-over-Fibre (RoF), is well suited for integrated access networks. First, the requirements for the wireless convergence of services based on Multi-Band Orthogonal-Frequency Division-Multiplexing UWB (MB-OFDM UWB) and WiMAX 802.16e in Wireless Personal Area Networks (WPAN) are stated. The aim of this study is to provide relevant protection margins in order to ensure the coexistence between both technologies. The obtained protection margins are of great interest for the development of advanced interference mitigation techniques such as DAA (Detect-and-Avoid), in the framework of future cognitive radio technologies. In a second step, the wireless coexistence of MB-OFDM UWB and WiMAX technologies is analyzed from the point of view of access networks based on RoF systems. Two experimental field trials are here carried out. In the first one, the wireless convergence is evaluated in a multi-mode fibre RoF system, whereas in the second one, the RoF system is based on a standard single-mode fibre. These experimental results provide relevant fibre link transmission distances to enable the deployment of RoF networks. Moreover, a new optical transmission technique based on polarization division multiplexing is proposed and experimentally evaluated in order to ensure the wireless coexistence in RoF systems. Finally, the impact of the electro-optical Mach-Zehnder modulator is analyzed, since the dynamic range of this device limits the performance of the RoF system. Moreover, a new optical linearization technique for Mach-Zehnder modulators is proposed and evaluated in order to overcome this limitation.

  4. [Distribution and taxonomy of Pyrgophorus platyrachis (Caenogastropoda: Hydrobiidae) in the Sistema de Maracaibo, Venezuela].

    PubMed

    Nava, Mario; Severeyn, Héctor; Machado, Nakary

    2011-09-01

    The presence of a microgastropod identified as Potamopyrgus sp. was detected previously in the Maracaibo System; nevertheless, a detailed morphological analysis identified this snail in other genera. The objective of this work is to update the distribution and taxonomy of Pyrgophorus platyrachis in the Maracaibo System, Venezuela in samples obtained between 2001 and 2009. The presence of hundreds of individuals of P. platyrachis were observed in the estuary, indeed in the localities of the Gran Eneal lagoon (4 111 snails), Peonías lagoon (229 snails), Punta Capitán Chico (758 snails), San Francisco (2 517 snails), Curarire (240 snails), Apon River mouth (173 snails), Ojeda City (240 snails), Bachaquero (128 snails) and Tomoporo de Agua (385 snails). We performed a taxonomical analysis, and emphasized in ecological aspects, such as the distribution of the species and habitat features, as near vegetation and type of associated sediment. We found three morphotypes of the species, one smooth, another with spiral striations and the other with spines. Smooth morphotype was exclusive of the Gran Eneal lagoon, Peonías lagoon, Punta Capitan Chico and Apon River mouth localities, whereas the other two morphotypes were found together in the remaining localities. According to our detailed anatomical and taxonomical analysis we propose a synonymy between P. platyrachis and the other species described like Pyrgophorus parvulus and Pyrgophorus spinosus.

  5. Estudio de la Velocidad de Rotacion EN LOS Sistemas Estelares a Simetria Axial

    NASA Astrophysics Data System (ADS)

    Sanz, J.; Catala, M. A.

    1986-12-01

    This paper contains the calculation of the tangential component of the velocity for a model of galaxy with axial symmetry, non.stationary state and equatorial symmetry plane, from the postulates and fundamental equations of Chandrasekhar theory, that shows a shift of the maximum for different values of the Z coordinate and the 0 direction. Key words: STELLAR DYNAMICS - STELLAR SYSTEMS

  6. Intermitência alfvênica gerada por caos na atmosfera solar e no vento solar

    NASA Astrophysics Data System (ADS)

    Rempel, E. L.; Chian, A. C.-L.; Macau, E. E. N.; Rosa, R. R.

    2003-08-01

    Dados medidos no vento solar rápido proveniente dos buracos coronais revelam que os plasmas no meio interplanetário são dominados por flutuações Alfvênicas, caracterizadas por uma alta correlação entre as variações do campo magnético e da velocidade do plasma. As flutuações exibem muitas características esperadas em turbulência magneto-hidrodinâmica totalmente desenvolvida, tais como intermitência e espectros contínuos. Contudo, os mecanismos responsáveis pela evolução de turbulência Alfvênica intermitente não são completamente compreendidos. Neste trabalho a teoria de caos é usada para explicar como sistemas Alfvênicos, modelados pela equação Schrödinger não-linear derivativa e pela equação Kuramoto-Sivashinsky, podem se tornar fortemente caóticos à medida em que parâmetros do plasma são variados. Pequenas perturbações no parâmetro de dissipação podem fazer com que o sistema mude bruscamente de um regime periódico, ou fracamente caótico, para um regime fortemente caótico. As séries temporais das flutuações do campo magnético nos regimes fortemente caóticos exibem comportamento intermitente, em que fases laminares ou fracamente caóticas são interrompidas por fortes estouros caóticos. É mostrado que o regime fortemente caótico é atingido quando as soluções periódicas ou fracamente caóticas globalmente estáveis interagem com soluções do sistema que são fortemente caóticas, mas globalmente instáveis. Estas soluções globalmente instáveis são conjuntos caóticos não-atrativos conhecidos como selas caóticas, e são responsáveis pelos fortes estouros nos regimes intermitentes. Selas caóticas têm sido detectadas experimentalmente em uma grande variedade de sistemas, sendo provável que elas desempenhem um papel importante na turbulência intermitente observada em plasmas espaciais.

  7. La producción de cráteres en el Sistema de Satélites de Saturno

    NASA Astrophysics Data System (ADS)

    Zanardi, M.; Di Sisto, R. P.

    The saturnian satellite system has been observed by the Cassini-Huygens mission, in particular the impact craters on them. These satellites present a diversity of surfaces which could help us to understand about their history. To study the production of craters on these satellites, we develop a theoretical model from previous simulations and we obtain the contribution of Centaur objects to the production of craters. We calculate the number of craters for a given size and the greatest crater produced by Centaur objects. This allowed us to compare our theoretical results with the observations by the Cassini-Huygens and determine the origin of craters as well as constrain the size distribution of Centaurs. FULL TEXT IN SPANISH

  8. Influencia de diferentes ecuaciones de transformacion del sistema UBVal RGU en el estudio fotometrico de cumulos galacticos.

    NASA Astrophysics Data System (ADS)

    Huestamendia Aparicio, G.

    Three-colour photometry of ten open clusters in the RGU system has been carried out. The calibration sequence has been defined using the Buser's transformation equations between the UBV and RGU systems, while in earlier works the Steinlin's formulae have been used. The results have been compared with those given in these works. Some differences have been found in G, G-R and U-G as a function of the spectral type and the interstellar absorption. They have a systematic character.

  9. Modelos autoconsistentes de sistemas estelares cuspidales y triaxiales con distribución de velocidades casi isotrópica

    NASA Astrophysics Data System (ADS)

    Carpintero, D. D.; Muzzio, J. C.; Navone, H. D.; Zorzi, A. F.

    It has been shown in many works that it is possible to build stable, self-consistent models of triaxial stellar systems, even with cusps, and containing high percentages of chaotic orbits. Since all these models have been obtained from cold collapses, their velocity distributions are strongly radial. Also, chaos was computed using either Lyapunov exponents or SALI. However, models obtained by adiabatic deformation of spherical systems, in which the velocity distribution is more isotropic, showed a very low level of chaos, though it must be noted that the method of detecting chaos used in this case, namely the variation of orbital frequencies, is less sensitive than the abovementioned methods. In this work, we present models obtained by adiabatic deformation, in which we compute the fraction of chaotic orbits using both Lyapunov exponents and variation of orbital frequencies. Our results show that the percentages of chaotic orbits is significant, though they are smaller than those obtained in models with strong radial velocity components. FULL TEXT IN SPANISH

  10. Curva de luz y análisis del sistema CPD-59 2603 (=Tr16-104)

    NASA Astrophysics Data System (ADS)

    Fernández Lajús, E.; Schwartz, M.; Torres, A.; Fariña, C.; Salerno, N., Llinares, C.; Niemela, V.

    CPD -59 2603 is a multiple system which belongs to the open cluster Trumpler 16. This system is composed by a short period eclipsing binary (O7V+O9.5V) and at least a third star (B0.2IV). We have made CCD observations using the HSH Telescope at CASLEO in order to obtain photometric data from this system. Some additional CCD images were obtained with the the Reflector Telescope at La Plata Observatory. In this work we present the resulting light curve of CPD -59 2603 in the Johnson-Cousins's V band. We have performed a preliminary analysis of the system from our photometry and the published spectroscopic data by means of the Wilson & Devinney (1971) code.

  11. Efectos difusivos en la formación de enanas blancas de Helio de baja masa en sistemas binarios cerrados

    NASA Astrophysics Data System (ADS)

    De Vito, M. A.; Benvenuto, O. G.

    In the last years, and thanks to advances in observational techniques, many astronomers have discovered in a great number of binary radio-pulsars the presence of a helium white dwarf resulting from a previous evolutionary state in which the progenitor of this star experienced one or more episodes of mass transfer to the compact component in the pair. That is the case for PSR B1855+09 (van Kerkwijk, M. H., Bell, J. F, Kaspi, V. M., & Kulkarni, S. R. 2000, ApJ 530, L37), where the mass for the white dwarf is known accurately from measurements of the Shapiro delay of the pulsar signal, MWD = 0.258+0.028-0.016 M⊙; for PSR J02018 + 4232 (Bassa, C. G., van Kerkwijk, M. H., & Kulkarni, S. R. 2003, A&A, 403, 1067), the spectra confirm that the companion is a helium-core white dwarf of ≈ 0.2 M⊙. On the other hand, there are several authors (Ferraro, F., Possenti, A., Sabbi, E., & D'Amico, N. 2003, ApJ, 596, L211; Bassa et al. 2003) that have identified the optical binary companion to the BMSP PSR J1911 - 5958A, located in the halo of the Galactic globular cluster NGC 6752, like a blue star whose position in the color-magnitude diagram is consistent with the cooling sequence of a low-mass, ≈ 0.17 - 0.20 M⊙, low metallicity helium white dwarf at the cluster distance. Finally, the color and magnitude of the stellar companion for B 1620-26 indicate that is a white dwarf of 0.34 ± 0.04 M⊙ (Sigurdson, S., Richer, H. B., Hansen, B. M., Stairs, I. H. & Thorset, S. E. 2003, Science, 301, 193S). This has motivated us to study the formation of low mass helium white dwarfs in the context of binary evolution. For that purpose, using the code of binary evolution, entirely developed in the Facultad de Ciencias Astronómicas y Geofísicas of the Universidad Nacional de La Plata, Argentina, we have investigated the effects of diffusive processes on the evolution of a star member of a close binary system. A similar study was performed for Althaus, L. G., Serenelli, A. M., & Benvenuto, O. G. (2001, MNRAS, 323, 471) but in that paper the mass transfer was mimicked by subtracting mass to a progenitor of 1 M⊙ to obtain the mass for the desired object. Actually, our binary code has a full nuclear reactions network for hydrogen and helium burning that allowed us to follow the abundances of fifteen isotopes throughout the entire evolution of the star. We have also included a detailed equation of state. The mass loss treatment is non conservative. We have modified the conditions for the beginning and end of mass transfer episodes. In our previous version, we assumed it to occur when the stellar radius was greater or smaller, respectively, that the Roche Lobe radius for the star. This introduced numerical problems, especially at the end of mass transfer phases. We adopted H. Ritter (1988, A&A, 202, 93) formulation that considers a finite scale height in the stellar atmosphere. The numerical behaviour in much more satisfactory, besides that it constitutes a more appropriate description for the physical problem. We perform the calculations for the evolution of the primary star in a close binary system of initial mass 2 M⊙, initial period of 1 day, initial mass ratio of 1.4142 and solar metallicity. We have done the calculations in four cases: A) with diffusion and all Roche Lobe overflows, B) with diffusion and only the first Roche Lobe overflow, C) without diffusion and all Roche Lobe overflows, D) without diffusion and only the first Roche Lobe overflow. Cases B) and D) where performed to compare with results obtained for Althaus et al. (2001). The main conclusion of this work is that the age of these objects is mainly determined by diffusive effects, and the late stages of mass transfer, not considered in Althaus et al. (2001), constituted a minor effect on the scales of cooling times.

  12. Exploring the Academic and Psychosocial Impact of El Sistema-Inspired Music Programs within Two Low Socio-Economic Schools

    ERIC Educational Resources Information Center

    Osborne, Margaret S.; McPherson, Gary E.; Faulkner, Robert; Davidson, Jane W.; Barrett, Margaret S.

    2016-01-01

    We sought to understand the potential for positive non-musical outcomes for economically and socially disadvantaged primary school students who are involved in instrumental music learning programs. Two schools with students experiencing generational poverty, current or first-generation immigrant or refugee status who were running El-Sistema…

  13. Cuerpo de Paz Manual de Sistema de Programacion y Capacitacion (Peace Corps Programming and Training System Manual): T0063.

    ERIC Educational Resources Information Center

    Peace Corps, Washington, DC.

    This Spanish version of the Peace Corps Programming and Training System Manual is designed to help field staff members of the Peace Corps train volunteers. Its task descriptions, guidelines, examples, and definitions are intended to be practical and informative rather than restrictive. The manual is divided into six major sections: (1)…

  14. Sistema Solar: de la observación de La Tierra a los planetas gigantes y sus lunas

    NASA Astrophysics Data System (ADS)

    Rodrigo, R.

    La fotoquímica tiene un papel principal en la composición de las atmósferas planetarias. Se examinan diferentes procesos fotoquímicos tanto para atmósferas oxidadas como reductoras, poniendo un especial énfasis en los ciclos químicos más importantes. En este sentido, se presentan diferentes ciclos químicos capaces de producir hidrocarbonos y nitrilos en atmósferas reductoras, así como aquellos capaces de mantener las proporciones de mezcla de las moléculas que contienen oxígeno, tales como CO2, O2 y H2O. También se analizan otros procesos importantes tales como la condensación y procesos de sputtering y de sublimación que han de tenerse en cuenta cuando se realizan modelos sobre la composición atmosférica.

  15. Life Support Systems. Environment Booklet 1. Teacher's Edition=Sistemas vitales. Libro del medio ambiente 1. Manual para El Maestro.

    ERIC Educational Resources Information Center

    California State Univ., Los Angeles. National Dissemination and Assessment Center.

    The booklet is part of a grade 10-12 social studies series produced for bilingual education. The series consists of six major thematic modules, with four to five booklets in each. The interdisciplinary modules are based on major ideas and designed to help students understand some major human problems and make sound, responsive decisions to improve…

  16. Sistemas Eolicos Pequenos para Generacion de Electridad (Spanish version of Small Wind Electric Systems: A U.S. Consumer's Guide)

    SciTech Connect

    Not Available

    2005-07-01

    This Spanish version of the popular Small Wind Electric Systems: A U.S. Consumer's Guide provides consumers with information to help them determine whether a small wind electric system can provide all or a portion of the energy they need for their home or business based on their wind resource, energy needs, and economics. Topics include how to make a home more energy efficient, how to choose the correct turbine size, the parts of a wind electric system, how to determine whether enough wind resource exists, how to choose the best site for a turbine, how to connect a system to the utility grid, and whether it's possible to become independent of the utility grid using wind energy. In addition, the cover of the guide contains a list of contacts for more information.

  17. O carater de Chern-Connes para C^*-sistemas dinamicos calculado em algumas algebras de operadores pseudodiferenciais

    NASA Astrophysics Data System (ADS)

    Dias, David P.

    2008-08-01

    Given a C^*-dynamical system (A, G, α) one defines a homomorphism, called the Chern-Connes character, that take an element in K_0(A) oplus K_1(A), the K-theory groups of the C^*-algebra A, and maps it into H_{{R}}^*(G), the real deRham cohomology ring of G. We explictly compute this homomorphism for the examples (overline{Psi_{cl}^0(S^1)}, S^1, α) and (overline{Psi_{cl}^0(S^2)}, SO(3), α), where overline{Psi_{cl}^0(M)} denotes the C^*-algebra generated by the classical pseudodifferential operators of zero order in the manifold M and α the action of conjugation by the regular representation (translations).

  18. The use of climatic parameters and indices in vegetation distribution. A case study in the Spanish Sistema Central

    NASA Astrophysics Data System (ADS)

    Gavilán, Rosario G.

    2005-11-01

    In this study, over 100 phytoclimatic indices and other climatic parameters were calculated using the climatic data from 260 meteorological stations in a Mediterranean territory located in the centre of the Iberian Peninsula. The nature of these indices was very different; some of them expressed general climatic features (e.g. continentality), while others were formulated for different Mediterranean territories and included particular limits of those indices that expressed differences in vegetation distribution. We wanted to know whether all of these indices were able to explain changes in vegetation on a spatial scale, and whether their boundaries worked similarly to the original territory. As they were so numerous, we investigated whether any of them were redundant. To relate vegetation to climate parameters we preferred to use its hierarchical nature, in discrete units (characterized by one or more dominant or co-dominant species), although it is known to vary continuously. These units give clearer results in this kind of phytoclimatic study. We have therefore used the main communities that represent natural potential vegetation. Multivariate and estimative analyses were used as statistical methods. The classification showed different levels of correlation among climatic parameters, but all of them were over 0.5. One hundred and eleven parameters were grouped into five larger groups: temperature (T), annual pluviothermic indices (PTY), summer pluviothermic indices (SPT), winter potential evapotranspiration (WPET) and thermal continentality indices (K). The remaining parameters showed low correlations with these five groups; some of them revealed obvious spatial changes in vegetation, such as summer hydric parameters that were zero in most vegetation types but not in high mountain vegetation. Others showed no clear results. For example, the Kerner index, an index of thermal continentality, showed lower values than expected for certain particular types of vegetation. Parameters relating to the water balance turned out to be very discriminative for separating vegetation types according to the season or the month when water begins to be scarce. Thus, water availability in soils is a limiting factor for the development of vegetation in spring or autumn as well as in summer. As expected, precipitation and temperature discriminated the altitudinal levels of vegetation. Finally, these index limits only worked in the territories where they were formulated, or in nearby areas.

  19. Estudio fotométrico de sistemas binarios y multiples de cumulos estelares de la Nube Mayor de Magallanes

    NASA Astrophysics Data System (ADS)

    Palma, T.; Clariá, J. J.; Geisler, D.; Ahumada, A. V.

    We study 11 probable binary or multiple systems of star clusters (SCs) of the Large Magellanic Cloud. They are formed by 31 SCs; out of which 19 have been observed in the Washington system with the Cerro Tololo ``Victor Blanco'' 4m telescope. We confirm a high probability of physical reality for some of the studied binary or multiple system candidates. We also determine their probable formation epochs and show that some of them could not be genuine physical systems. In all cases we recommend to confirm the physical association of these SC systems by examining their heliocentric distances and relative radial velocities. FULL TEXT IN SPANISH

  20. Cinemática de sistemas interactuantes de tipo M51: Relación de Tully-Fisher

    NASA Astrophysics Data System (ADS)

    Gúnthardt, G.; Díaz, R. J.

    We present heliocentric radial velocity distributions of six M51-type galaxies. Additionally we present Tully-Fisher relations for M51-type systems from our kinematic catalog (Gunthardt et al. 2006) with the velocities determined from H-alpha and using B-band absolute magnitudes; we also considered systems with maximum velocities from HI lambda-21 cm line. In both cases, we found shallower relations compared with nearby spiral galaxies, in agreement with the results found by Reshetnikov & Klimanov (2003). FULL TEXT IN SPANISH

  1. Radio Engineering System of Short-Range Navigation. RSBN-2. Part 2, (Radioteknicheskaya Sistema Blizhney Navigatisii RSBN-2)

    DTIC Science & Technology

    1977-02-09

    mark is slant, ranges. For ccnvenience in the reading on screen are created the markets of azimuth (2o. 100 and 300) and of range (10 and 50 kn). Ten...2320 r/min); driver with thti cairbon regulator cf voltage; control board. _I 11 DOC = 77150017 PAGE 4P Fig. 147. Cabinet of the feed of the radio...mIounting 94f thle diagram of power electric power supplv is made by thf- iire of the brand of RPVL. WiLes outside appiratus cabin are includ~-i into

  2. PLANETALP338: Un nuevo código para la síntesis poblacional de sistemas planetarios

    NASA Astrophysics Data System (ADS)

    Ronco, M. P.; Guilera, O. M.; de Elía, G. C.

    2016-08-01

    In the last years, the observational progress allowed us to study and characterize exoplanets in different planetary systems. From a theoretical point of view, the population synthesis models allow us to link the diversity of planetary systems to the protoplanetary disks where they are formed. In this work, we present the main characteristics of a new code, named PlanetaLP338, able to calculate the formation of a planetary system and to describe the evolution of the embryos and planetesimals while the gas is still present in the protoplanetary disk. Our model incorporates the main physical phenomena for planetary formation such as type I and II migrations, gaseous accretion, water delivery in embryos and planetesimals, and mergers between embryos taking into account their respective atmospheres. A particular application of PlanetaLP338 is its automatization to generate population synthesis and to analize the different types of resulting planetary systems. The aim of this work is to explore the ranges of physical parameters that generate planetary systems analog to the Solar System in order to improve our knowledge about its formation.

  3. [Health reform and the creation of the Sistema Único de Saúde: notes on contexts and authors].

    PubMed

    Paiva, Carlos Henrique Assunção; Teixeira, Luiz Antonio

    2014-01-01

    Within the context of the return to democracy, the new constitution enacted in 1988 transformed health into an individual right and initiated the process of creating a public, universal and decentralized health system, profoundly altering the organization of public health in Brazil. This article discusses the main institutional, political and social aspects of this health reform, along with the changes, the continuities and the major initiatives, based on the literature published by the most widely read authors in this field of study. Without purporting to offer an exhaustive analysis, we discuss how the historiography written by authors who were also actors in the process assess its main features, along with the genesis of the process and the legacy of health reform in Brazil.

  4. The use of climatic parameters and indices in vegetation distribution. A case study in the Spanish Sistema Central.

    PubMed

    Gavilán, Rosario G

    2005-11-01

    In this study, over 100 phytoclimatic indices and other climatic parameters were calculated using the climatic data from 260 meteorological stations in a Mediterranean territory located in the centre of the Iberian Peninsula. The nature of these indices was very different; some of them expressed general climatic features (e.g. continentality), while others were formulated for different Mediterranean territories and included particular limits of those indices that expressed differences in vegetation distribution. We wanted to know whether all of these indices were able to explain changes in vegetation on a spatial scale, and whether their boundaries worked similarly to the original territory. As they were so numerous, we investigated whether any of them were redundant. To relate vegetation to climate parameters we preferred to use its hierarchical nature, in discrete units (characterized by one or more dominant or co-dominant species), although it is known to vary continuously. These units give clearer results in this kind of phytoclimatic study. We have therefore used the main communities that represent natural potential vegetation. Multivariate and estimative analyses were used as statistical methods. The classification showed different levels of correlation among climatic parameters, but all of them were over 0.5. One hundred and eleven parameters were grouped into five larger groups: temperature (T), annual pluviothermic indices (PTY), summer pluviothermic indices (SPT), winter potential evapotranspiration (WPET) and thermal continentality indices (K). The remaining parameters showed low correlations with these five groups; some of them revealed obvious spatial changes in vegetation, such as summer hydric parameters that were zero in most vegetation types but not in high mountain vegetation. Others showed no clear results. For example, the Kerner index, an index of thermal continentality, showed lower values than expected for certain particular types of vegetation. Parameters relating to the water balance turned out to be very discriminative for separating vegetation types according to the season or the month when water begins to be scarce. Thus, water availability in soils is a limiting factor for the development of vegetation in spring or autumn as well as in summer. As expected, precipitation and temperature discriminated the altitudinal levels of vegetation. Finally, these index limits only worked in the territories where they were formulated, or in nearby areas.

  5. Estudio general de la region del Lago Titicaca evaluando en forma preliminar un sistema de analisis interactivo de imagenes multiespectrales

    USGS Publications Warehouse

    Brockmann, C.E.; Carter, William D.

    1976-01-01

    ERTS-1 digital data in the form of computer compatible tapes provide the geoscientist with an unusual opportunity to test the maximum flexibility of the satellite system using interactive computers, such as the General Electric Image 100 System. Approximately 9 hours of computer and operator time were used to analyze the Lake Titicaca image, 1443-14073, acquired 9 October 1973. The total area of the lake and associate wetlands was calculated and found to be within 3 percent of previous measurements. The area was subdivided by reflectance characteristics employing cluster analysis of all 4 bands and later compared with density values of band 4. Reflectance variations may be attributed to surface roughness, water depth and bottom characteristics, turbidity, and floating matter. Wetland marsh vegetation, vegetation related to ground-water effluents, natural grasses, and farm crops were separated by cluster analysis. Sandstone, limestone, sand dunes, and several volcanic rock types were similarly separated and displayed by assigned colors and extended through the entire scene. Waste dumps of the Matilde Zinc Mine and smaller mine workings were tentatively identified by signature analysis. Histograms of reflectance values and map printouts were automatically obtained as a record of each of the principal themes. These themes were also stored on a work tape for later display and photographic record as well as to serve in training. The Image 100 System is rapid, extremely flexible and very useful to the investigator in identifying subtle features that may not be noticed by conventional image analysis. The entire scene, which covers 34,225 km2, was analyzed at a scale of 1:600,000, and portions at 1:98,000 and 1:25,000, during a 9-hour period at a rental cost of $250 per hour. Costs to the user can be reduced by restricting its uses to specific areas, objectives, and procedures, rather than undertaking a complete analysis of a total scene.

  6. Alternancia entre el estado de emisión de Rayos-X y Pulsar en Sistemas Binarios Interactuantes

    NASA Astrophysics Data System (ADS)

    De Vito, M. A.; Benvenuto, O. G.; Horvath, J. E.

    2015-08-01

    Redbacks belong to the family of binary systems in which one of the components is a pulsar. Recent observations show redbacks that have switched their state from pulsar - low mass companion (where the accretion of material over the pulsar has ceased) to low mass X-ray binary system (where emission is produced by the mass accretion on the pulsar), or inversely. The irradiation effect included in our models leads to cyclic mass transfer episodes, which allow close binary systems to switch between one state to other. We apply our results to the case of PSR J1723-2837, and discuss the need to include new ingredients in our code of binary evolution to describe the observed state transitions.

  7. Scientific and technological capabilities in health-related areas: opportunities, challenges, and interactions with the industrial sector.

    PubMed

    Vargas, Marco Antonio; Britto, Jorge

    2016-11-03

    Characterization of the scientific and technological infrastructure in health and its interactions with the industrial sector provides key elements for understanding the dynamics of innovation in health. This study conducts an exploratory analysis of the potentialities and limitations associated with scientific and technological capabilities in the health area in Brazil and the different links between the scientific and industrial sectors in health. The analysis points to important growth in internationally indexed research output, especially in certain areas such as pharmaceutics, public health, genetics, morphology, physiology, and microbiology. There has also been important growth in research groups that interact with the industrial sector in selected areas of health. The study highlights the importance of building more solid and permanent bridges between companies, research institutions, and the health system, linking the knowledge developed in research institutions to the dynamics of the industrial sector in health. Resumo: A caracterização da infraestrutura científica e tecnológica na área da saúde e das suas formas de articulação com a base produtiva representam elementos centrais na compreensão da dinâmica de inovação em saúde. Este estudo faz uma análise exploratória sobre as potencialidades e limitações associadas às capacitações científicas e tecnológicas na área da saúde no Brasil e as formas de articulação entre a base científica e a base produtiva em saúde. A análise aponta para o crescimento expressivo da produção bibliográfica com circulação internacional no campo da saúde, particularmente em determinadas áreas como farmácia, saúde coletiva, genética, morfologia, fisiologia e microbiologia. Além disso, observa-se um crescimento expressivo dos grupos de pesquisa com relacionamentos com o setor produtivo em áreas selecionadas da saúde. Destaca-se a importância da construção de pontes mais sólidas e

  8. The link between industry and social interests in health in Brazil's National Health Innovation System: the experience of the Brazilian National Institute of Traumatology and Orthopedics (INTO).

    PubMed

    Vianna, Cid Manso de Mello; Fermam, Marcelo Kropf Santos; Rodrigues, Marcus Paulo da Silva; Mosegui, Gabriela Bittencourt Gonzalez

    2016-11-03

    This article has two parts. The first discusses the relationship between industry and health interests based on three different but non-mutually exclusive "logics": (a) independent; (b) divergent; and (c) convergent. The second part describes the experience at the Brazilian National Institute of Traumatology and Orthopedics (INTO) with a technology management model. The accumulated expertise in orthopedics at INTO can favor Brazil's domestic medical equipment industry without jeopardizing the country's social health needs. This means directing the production of feasible technologies adapted to the national reality, with a focus on safety and quality, without burdening the public coffers and by overcoming the country's dependency on imported products. The proposal is to promote socioeconomic development through a virtuous circle by attracting reserves and fomenting national competitiveness in domestic and foreign markets while improving social conditions and access to health. Resumo: Este artigo está dividido em duas partes. Na primeira, discute-se como se relacionam os interesses produtivos e a saúde a partir de três "lógicas" ou perspectivas diferentes que não são mutuamente excludentes: (a) independente; (b) divergente e (c) convergente. Na segunda, descreve-se a experiência do Instituto Nacional de Traumatologia e Ortopedia (INTO) na montagem de um modelo de gestão de tecnologia. O conhecimento internalizado em ortopedia do INTO pode favorecer a indústria nacional de equipamentos médicos sem abandonar as necessidades sociais brasileiras de saúde. Isto é, direcionar a produção de tecnologias viáveis e adaptadas à realidade nacional, com foco em segurança e qualidade, sem onerar os cofres públicos e abandonando a dependência de produtos importados. A proposta é a de promover um desenvolvimento socioeconômico que construa um ciclo virtuoso, por atrair divisas e fomentar a competitividade nacional em mercados internos e externos, melhorando as

  9. Activités physiques libres ou encadrées et condition physique liée à la santé chez des adultes burundais: étude transversale

    PubMed Central

    Bizimana, Jean Berchmans; Lawani, Mansourou Mohamed; Akplogan, Barnabé; Gaturagi, Charles

    2016-01-01

    Introduction l’activité physique régulière a un impact positif sur la santé. Cette étude a pour objet de comparer la condition physique liée à la santé des adultes qui s’exercent librement avec celle des adultes bénéficiant d’un encadrement professionnel. Elle tente aussi d’établir une relation entre le niveau d’activité physique et les paramètres de la condition liée à la santé. Méthodes nous avons évalué le niveau d’activité physique et les paramètres de la condition physique liée à la santé. Par le test t pour échantillons indépendants, nous avons comparé les moyennes et avons par le calcul du coefficient de corrélation r de Pearson analysé la relation entre le niveau d’activité physique et les paramètres de la condition physique. Résultats des écarts significatifs (p < 0,05) de niveau d’activité physique, de souplesse, de V˙O2max et de la FC de repos ont été enregistrés en faveur du groupe encadré. Le niveau d’activité physique est positivement corrélé (p < 0,05) au V˙O2max et à la force de préhension mais négativement corrélé à la FC de repos et au cholestérol LDL. La prévalence des facteurs de risque cardiovasculaire n’est pas élevée excepté pour le cholestérol HDL. Conclusion les résultats de cette étude montrent que l’activité physique libre est aussi efficace que l’activité physique encadrée dans le maintien des profils lipidique et physiologique favorables à la santé chez l’adulte burundais. Cependant, l’activité physique encadrée apporte des bénéfices supplémentaires pour le V˙O2max, la fréquence cardiaque de repos, la souplesse antérieure et la détente verticale PMID:28203315

  10. Fluid Dynamics Problems of Vehicles Operating Near or in the Air-Sea Interface (Problemes de Dynamique des Fluides des Vehicules Evoluant dans ou pres de L’interface Air-Mer).

    DTIC Science & Technology

    1999-02-01

    ecoulement ä surface libre, instationnaire, couple avec des effets thermodynamiques lies aux gaz de chasse chauds et condensables. Dans une premiere...fermeture de la bulle. Dans une seconde partie une decomposition des phenomenes thermodynamiques basee sur une modelisation et des calculs numeriques [4... thermodynamiques interviennent si les gaz de chasse sont condensables. C’est ce qui arrive lorsque ces gaz resultent d’une combustion et qu’ils sont

  11. L'E.A.P. ou l'anglais enseigne dans les etudes superieures. Un guide pour le debutant (E.A.P. or English for Academic Purposes: A Guide for the Beginner).

    ERIC Educational Resources Information Center

    Roe, Peter J.

    1981-01-01

    Addresses those readers who are not familiar with EAP, offering an introductory discussion of its objectives and methods, in two parts. Devotes the first part to the needs that justify an EAP approach, and the second to its methodology, with particular attention to interdisciplinary, task-oriented instruction. Societe Nouvelle Didier Erudition, 40…

  12. Neuromuscular and cardiovascular effects of mivacurium chloride (BW B109OU) during nitrous oxide-narcotic, nitrous oxide-halothane and nitrous oxide-isoflurane anesthesia in surgical patients.

    PubMed

    Pearson, K S; From, R P; Choi, W W; Abou-Donia, M; Sokoll, M D

    1990-06-01

    One hundred seventeen adult surgical patients were studied to compare neuromuscular and cardiovascular effects of mivacurium chloride during nitrous oxide-narcotic (BAL, n = 45) nitrous oxide-halothane (HAL, n = 27) and nitrous oxide-isoflurane (ISF, n = 45) anesthesia. Anesthesia was maintained with nitrous oxide (60%-70%) and oxygen (30%-40%) with end-tidal concentrations of halothane or isoflurane to yield a total MAC of approximately 1.25, or with supplemental fentanyl and thiopental as clinically indicated. Twitch response of the adductor pollicis muscle was elicited by supramaximal square wave pulses of 0.2 msec duration at a frequency of 0.15 Hz (Grass S44 stimulator) to the ulnar nerve and quantitated by a Grass FT10 transducer. Nine patients in each of the HAL and ISF groups received one of four doses of mivacurium (0.03, 0.05, 0.10 or 0.15 mg/kg). Ninety patients in the balanced anesthesia group received one of seven doses of mivacurium (0.03, 0.04, 0.05, 0.08, 0.15, 0.20, 0.25 mg/kg). The ED50, ED75 and ED95 of mivacurium in each group were estimated from linear regression plots of log dose versus probit of maximum percentage depression of twitch height. The ED50, ED75 and ED95 for halothane and isoflurane are 0.040, 0.053 and 0.081 and 0.037, 0.043 and 0.053, respectively. The ED50, ED75, and ED95 for the balanced group are 0.039, 0.050, and 0.073 mg/kg respectively. There was no significant difference between the slopes of the HAL and BAL inhalation anesthetic dose-response curves. The slope of the ISF group was significantly than the slope of the BAL group. Intercepts of the HAL and BAL curves were not different. The isoflurane curve's intercept was significantly less than the other groups' intercepts, lying above the halothane curve, but below the BAL curve. For the 0.05 mg/kg dose, maximum block was greater in the ISF group (89.1 +/- 2.7%, n = 9) than in the HAL (70.3 +/- 7.6%, n = 9) or BAL (67.7 +/- 6.4%, n = 9) groups. At higher doses of mivacurium, isoflurane produces a greater potentiation of neuromuscular block than halothane or balanced anesthesia. There were no significant cardiovascular changes seen in any group following mivacurium doses up to 0.15 mg/kg (approximately 2xED95).

  13. Can a combined screening/treatment programme prevent premature failure of renal transplants due to chronic rejection in patients with HLA antibodies: study protocol for the multicentre randomised controlled OuTSMART trial

    PubMed Central

    2014-01-01

    Background Renal transplantation is the best treatment for kidney failure, in terms of length and quality of life and cost-effectiveness. However, most transplants fail after 10 to 12 years, consigning patients back onto dialysis. Damage by the immune system accounts for approximately 50% of failing transplants and it is possible to identify patients at risk by screening for the presence of antibodies against human leukocyte antigens. However, it is not clear how best to treat patients with antibodies. This trial will test a combined screening and treatment protocol in renal transplant recipients. Methods/Design Recipients >1 year post-transplantation, aged 18 to 70 with an estimated glomerular filtration rate >30 mL/min will be randomly allocated to blinded or unblinded screening arms, before being screened for the presence of antibodies. In the unblinded arm, test results will be revealed. Those with antibodies will have biomarker-led care, consisting of a change in their anti-rejection drugs to prednisone, tacrolimus and mycophenolate mofetil. In the blinded arm, screening results will be double blinded and all recruits will remain on current therapy (standard care). In both arms, those without antibodies will be retested every 8 months for 3 years. The primary outcome is the 3-year kidney failure rate for the antibody-positive recruits, as measured by initiation of long-term dialysis or re-transplantation, predicted to be approximately 20% in the standard care group but <10% in biomarker-led care. The secondary outcomes include the rate of transplant dysfunction, incidence of infection, cancer and diabetes mellitus, an analysis of adherence with medication and a health economic analysis of the combined screening and treatment protocol. Blood samples will be collected and stored every 4 months and will form the basis of separately funded studies to identify new biomarkers associated with the outcomes. Discussion We have evidence that the biomarker-led care regime will be effective at preventing graft dysfunction and expect this to feed through to graft survival. This trial will confirm the benefit of routine screening and lead to a greater understanding of how to keep kidney transplants working longer. Trial registration Current Controlled Trials ISRCTN46157828. PMID:24447519

  14. Modalités de prise de décision chez les filles et les garçons en la présence ou en l'absence de l'enseignant

    NASA Astrophysics Data System (ADS)

    Zghibi, Makram; Sahli, Hajer; Jabri, Mohamed; Ouelhezi, Samira; Guelmemi, Noomen; Wallian, Nathalie

    2013-12-01

    How girls and boys take decisions in the presence and absence of a teacher - This work is part of an innovative approach to physical and sports education in Tunisia, and team sports in particular. It uses language studies carried out within the framework of this teaching both to generate a reflective attitude on the part of students, and to identify the effect of gender as a variable in the ways in which they make decisions. Discourse analysis highlights the importance of language output by girls and boys in football teaching when a teacher is present or absent. The teacher is an institutional authority who imposes specific uses of language, and when he/she is absent, emotional tensions predominate and may reflect the repression of ideas that occurs when the teacher is present. Although girls appear to take part in the discussion, their utterances are fewer in number, and their analytical statements less effective than those of boys. Girls never gain the upper hand over boys. The study also suggests a redefinition of social role divisions on the basis of gender - masculinity and femininity.

  15. Fiches pratiques: Modalites logiques; De l'image au recit; Trois lettres; Ou est la Provence (Practical Ideas: Logical Modalities; From Picture to Words; Three Letters; Where Is Provence).

    ERIC Educational Resources Information Center

    Gasser, Rachel Beatrice; And Others

    1993-01-01

    Four ideas for classroom French instruction are described, including a lesson in the use of indicative and subjunctive moods; creative writing exercises; a comparison of the text styles of letters with different purposes; and a beginning French geography lesson. (MSE)

  16. Altérations dans la zone tropicale. Signification à travers les mécanismes anciens et/ou encore actuelsWeathering in tropical zone. Significance through ancient and still active mechanisms

    NASA Astrophysics Data System (ADS)

    Nahon, Daniel

    2003-12-01

    The microscopic study of the organization of soils and alterites reveals the direction of evolution and the genetic and historical relationship between their constitutive minerals and how, subsequently, geochemical processes could be visualized. If certain soils and alterites may be considered to be the products of recent weathering, others span a much longer time interval. These different aspects of the weathering mantle coexist in the same landscape, and this situation makes them difficult to distinguish. In other words, the weathering mantle that extends over most continental areas is a real patchwork in search for an equilibrium never reached. So, in lateritic weathering mantles, most of genetic and evolutive modelling reveals the complexity of geochemical processes and time scale required to their differentiation ranges from one to several million years. The weathering rates and ages of weathering profiles are discussed as a function of processes that run at the top and at the bottom of weathering mantles. To cite this article: D. Nahon, C. R. Geoscience 335 (2003).

  17. Les Sciences Physiques À L'école Maternelle: Un Cadre Sociocognitif Pour La Construction Des Connaissances ET/OU LE Développement Des Activités Didactiques

    NASA Astrophysics Data System (ADS)

    Ravanis, Konstantinos

    2005-05-01

    NATURAL SCIENCES IN KINDERGARTEN: A SOCIO-COGNITIVE FRAMEWORK FOR LEARNING AND TEACHING - The present study presents a socio-cognitive framework for the construction of the scientific knowledge of natural phenomena among pre-school children and for the development of science activities at kindergarten. It involves elements from theories of social interaction; social psychology of development and cognitive functioning; and research in natural-science teaching methods which acknowledge the importance and fundamental role of social interaction in the development of cognitive operations and learning. The study also presents some of the more significant results of the research carried out on different aspects of this topic. The discussion unfolded here supports the hypothesis that the construction of natural-scientific knowledge at the pre-school age and corresponding scholastic activities are necessary and effective.

  18. La Carriere: Chance ou Planification? = Career: Chance or Planning? = Cariera: Sansa sau Planificare? Proceedings of the Annual Meeting of the International Association for Educational and Vocational Guidance (Brasov, Romania, September 22-24, 1997).

    ERIC Educational Resources Information Center

    Cujba, Andrei, Ed.; Westfried, Stefan, Ed.

    1997-01-01

    These proceedings consist of 62 presentations (21 written in French, 19 in English, 21 in Romanian, 1 in Spanish). The foreword appears in French, English, and Romanian. Papers written in English include the following:"Vocational Guidance and Change of Career: The New Demands" (Graciela Canessa); "Intervention Strategies. Youth…

  19. Non-contact laser speckle sensor for measuring one- and two-dimensional angular displacement Capteur non-contact de laser speckle pour mesurer le déplacement angulaire à une ou deux dimensions

    NASA Astrophysics Data System (ADS)

    Rose, Bjarke; Imam, Husain; Hanson, Steen G.

    1998-06-01

    A novel method for measurement of angular displacement in one or two dimensions for arbitrarily shaped objects is presented. The method is based on Fourier transforming the scattered field from a single laser beam that illuminates the target. The angular distribution of the light field at the target is linearly mapped onto an array image sensor placed in the Fourier plane. Measuring this displacement facilitates the determination of the angular displacement. It is demonstrated both theoretically and experimentally that the angular displacement sensor is insensitive to object shape, target distance and any longitudinal or transverse movement of the target, if the image sensor is placed in the Fourier plane. A straightforward procedure to place the image sensor in the Fourier plane is presented here. Theoretically and experimentally, it is shown that the method has a resolution of 0.3 mdeg for small angular displacements, and methods for further improvement in resolution are discussed. No special surface treatment is required for surfaces having irregularities of the order of or larger than the wavelength of the incident light. It is shown that this is the case for most surfaces of practical interest. Furthermore, it is shown that robust, non-contact optical systems for industrial applications can be produced.

  20. Directory of Factual and Numeric Databases of Relevance to Aerospace and Defence R and D (Repertoire de Bases de donnees Factuelles ou Numeriques d’interet pour la R and D).

    DTIC Science & Technology

    1992-07-01

    Tecnica Aeroespacial [INTA]) ADDRESS/POINT OF CONTACT: Attention: Elisa Sugranez Puerto Pinto Rosales, 34 28008 Madrid, Spain Fax: 34 (1) 2480872...atmospheric molecular extinction coefficients, total extinction ratios, ozone and N02 mixing ratios, and corresponding error arrays as a function of

  1. News and Views: Space technology in the oil industry; OU to play role in next stage of Mars exploration; Viking revisited; Wish you were here? GOCE gets going again

    NASA Astrophysics Data System (ADS)

    2010-10-01

    The troubles flowing from BP's Macondo oil well in Gulf of Mexico have focused attention on the technological demands of safe deep-water drilling. European Space Agency research presented in a Space and Energy Seminar in August offers spin-off technologies that could support oil exploration and production in extreme environments, from corrosion control to better robotics. NASA and the European Space Agency have embarked on a joint programme to study the chemical composition of the atmosphere of Mars from 2016. They have just announced the providers of five scientific instruments for the first mission, including two consortia in which the Open University has a major role.

  2. L'application d'un modele mathematique a l'analyse de dissertations en langue seconde: utile ou pas (Application of a Mathematical Model in the Analysis of Essays in a Second Language: Useful or Not?)?

    ERIC Educational Resources Information Center

    Corbeil, Giselle

    1998-01-01

    A study analyzed the second-language essays of seven anglophone and one French-speaking Quebec university students enrolled in a literature course by using a cognitive-metacognitive framework developed for mathematical problem-solving and a think-aloud protocol. Results indicate the framework, with some adjustments, is a reliable tool for…

  3. Enseigner aux eleves ayant des troubles emotionnels et (ou) des psychopathologies. Elabore pour les eleves ayant des besoins speciaux (Teaching Students with Emotional Disorders and/or Mental Illnesses. Elaborated for Eligible Special Needs Students).

    ERIC Educational Resources Information Center

    Alberta Learning, Edmonton. Direction de l'education francaise.

    This resource manual, in French, is designed to assist Alberta teachers in the identification and education of students with emotional disorders and/or mental illnesses. It takes a comprehensive look at six emotional disorders. The first section focuses on eating disorders. It describes the characteristics and symptoms of anorexia nervosa, bulimia…

  4. Le shunt circulaire dans la forme néonatale sévère de la maladie d’Ebstein : effet bénéfique ou délétère des prostaglandines?

    PubMed Central

    Hakim, Kaouthar; Boussaada, Rafik; Ayari, Jihen; Imen, Hamdi; Msaad, Hela; Ouarda, Fatma; Chaker, Lilia

    2014-01-01

    Résumé La maladie d’Ebstein avec atrésie pulmonaire fonctionnelle est une présentation sévère néonatale de la maladie d’Ebstein où la conduite thérapeutique se base classiquement sur la prescription de prostaglandines. Le shunt circulaire est une complication « hémodynamique » grave et souvent méconnue, incitant à l’arrêt des prostaglandines. Nous rapportons une forme néonatale sévère de maladie d’Ebstein avec aggravation hémodynamique attribuée à un shunt circulaire. Le diagnostic de maladie d’Ebstein avec atrésie pulmonaire fonctionnelle a été fait en anténatal à 36 semaines d’aménorrhée. Le patient est né à 38 semaines d’aménorrhée par césarienne. Une échographie post-natale a confirmé le diagnostic. Un traitement par prostaglandines a été initialement institué pour maintenir le canal artériel vicariant. Malgré ce traitement, une dégradation hémodynamique a été observée. L’échographie de contrôle a montré des images en faveur d’un shunt circulaire. En effet, Le sang arrivant dans l’artère pulmonaire par le canal artériel large, était « aspiré » vers le ventricule droit, puis dans l’oreillette droite du fait de la régurgitation tricuspide et de là vers le coeur gauche via le foramen ovale shuntant droite-gauche; il était alors éjecté dans l’aorte et le canal artériel. Devant ce shunt circulaire, le traitement par prostaglandines était interrompu et un traitement visant à réduire plutôt les résistances pulmonaires a été prescrit. Cependant, le patient est décédé avant l’instauration de ce traitement. La forme néonatale de maladie d’Ebstein est une forme grave qui peut se compliquer d’un shunt circulaire. Ce phénomène hémodynamique encourage la fermeture précoce du canal artériel contre indiquant ainsi la prescription des prostaglandines. PMID:25642457

  5. The autographa californica multiple nucleopolyhedrovirus ODV-E56 envelope protein is required for oral infectivity and can be functionally substituted by rachiplusia ou multiple nucleopolyhedrovirus ODV-E56

    Technology Transfer Automated Retrieval System (TEKTRAN)

    The Autographa californica multiple nucleopolyhedrovirus (AcMNPV) odv-e56 gene encodes an occlusion-derived virus (ODV)-specific envelope protein, ODV-E56. In a previous analysis, the odv-e56 gene was found to be under positive selection pressure, suggesting that it may be a determinant of viral ho...

  6. Pollution Atmosphérique et Santé: Corrélation ou Causalité? Le Cas de la Relation entre l'Exposition aux Particules et la Mortalité Cardio-pulmonaire.

    PubMed

    Dab, William; Ségala, Claire; Dor, Frédéric; Festy, Bernard; Lameloise, Philippe; Moullec, Yvon Le; Tertre, Alain Le; Médina, Sylvia; Quénel, Philippe; Wallaert, Benoît; Zmirou, Et Denis

    2001-02-01

    De nombreuses études épidémiologiques ont observé dans des contextes différents une faible relation à court terme entre les particules et la mortalité cardio-pulmonaire, même quand les normes de qualité de l'air n'étaient pas dépassées. La causalité de cette relation est un enjeu de santé publique en raison de l'importance de la population exposée. Notre objectif est de faire l'inventaire critique des arguments utilisés dans 15 revues de la littérature publiées. Nous expliquons l'importance de distinguer la validité de la causalité et analysons de façon systématique les différents critères de jugement dans le contexte des études écologiques temporelles. Notre conclusion est que la relation observée est valide et que la plupart des critères de causalité sont respectés. Diminuer le niveau d'exposition des populations aux particules est souhaitable. En Europe, en agissant à la source, notamment sur les émissions Diesel, on diminuera aussi d'autres polluants qui peuvent jouer un rôle sanitaire. Aux États-Unis, la situation est plus complexe car les particules sont surtout secondaires. Il est également indispensable de poursuivre les recherches pour mieux connaître les déterminants des expositions globales des individus et mieux comprendre le rôle toxique des différents facteurs physico-chimiques des particules.

  7. "Bonjour History": Materials and Ideas for Teaching Louisiana's Cajun History = "Bonjour l'Histoire": Quelques Idees, Deux ou Trois Activites, et Plusieurs Materiaux pour l'Enseignement de l'Histoire des Cadiens en Louisiane.

    ERIC Educational Resources Information Center

    Mounier, Brenda

    The goals of this teacher's guidebook and videotape are designed to incorporate Acadian (Cajun) history into the 4th grade social studies curriculum and the 4th and 5th grade Louisiana 30-minute daily French programs and French immersion programs. Another goal is to create an awareness, appreciation, and understanding of Acadian history in…

  8. L'enseignement d'une langue (non-maternelle ou maternelle) aux apprenants en difficulté et aux enfants issus de milieux socialement défavorisés

    NASA Astrophysics Data System (ADS)

    Wambach, Michel

    1986-06-01

    Official statistics reveal a high percentage of school failure at primary-school level in Belgium, notably among children from socially disadvantaged backgrounds, be they francophone or foreign. Furthermore, the percentage of adult illiteracy is rising. These situations share a common root: the methodology of the mother tongue at school and the approach to the written language in particular. After defining the psychological objective of a language course the present study proposes a methodology, a synthesis of up-to-date psycho-pedagogical, linguistic and (neuro) biological trends. The data from this research make it possible to verify the working hypotheses which have been elaborated and revised over the last twenty years. Within the recommended methodology, the libération de la parole (`liberation of speech') occupies an important place. This initial stage increases and reinforces the creative dispositions in the child and prepares for real language activities. These help the child to communicate and enable a functional learning of the language. The methodology of reading takes into account research conducted on the operation of the memory and the selective activity of the brain. A first evaluation of the methodology has verified the working hypotheses. Moreover, the pupils in the experimental classes obtained markedly higher grades in tests such as reading comprehension, elaborating texts and in those tests calling for imagination and creativity.

  9. Lignes directrices sur l’aiguillage des cas soupçonnés de cancer colorectal par un médecin de famille ou autre professionnel des soins primaires

    PubMed Central

    Del Giudice, M. Elisabeth; Vella, Emily T.; Hey, Amanda; Simunovic, Marko; Harris, William; Levitt, Cheryl

    2014-01-01

    Résumé Objectif Ces lignes directrices ont pour but d’aider les médecins de famille et les autres professionnels des soins primaires à reconnaître les caractéristiques qui devraient susciter leurs soupçons quant à la présence d’un cancer colorectal (CCR) chez leurs patients. Composition du comité Les membres du comité ont été choisis parmi les dirigeants régionaux des soins primaires au sein du Réseau provincial des soins primaires et de la lutte contre le cancer, les membres du Comité consultatif sur le dépistage du cancer colorectal de l’Ontario et les membres du Groupe sur le siège de la maladie, Cancer gastrointestinal, d’Action Cancer Ontario. Méthodes Ces lignes directrices sont le fruit d’une revue systématique et d’une synthèse des données probantes, ainsi que d’un examen formel par des intervenants canadiens pour valider la pertinence des recommandations. Rapport Des lignes directrices fondées sur des données probantes ont été élaborées pour améliorer la prise en charge des patients qui présentent des caractéristiques cliniques d’un CCR et ce, dans le contexte canadien. Conclusion Un équilibre judicieux entre une suspicion de CCR et le niveau de risque d’un tel cancer devrait favoriser une demande de consultation en temps opportun par les médecins de famille et les professionnels des soins primaires. Ces lignes directrices pourraient aussi orienter les décisions de demander une consultation à des programmes d’évaluation diagnostique du CCR.

  10. Lignes directrices sur l’aiguillage des cas soupçonnés de cancer du poumon par un médecin de famille ou autre professionnel des soins primaires

    PubMed Central

    Del Giudice, M. Elisabeth; Young, Sheila-Mae; Vella, Emily T.; Ash, Marla; Bansal, Praveen; Robinson, Andrew; Skrastins, Roland; Ung, Yee; Zeldin, Robert; Levitt, Cheryl

    2014-01-01

    Résumé Objectif Les présentes lignes directrices visent à aider les médecins de famille et autres généralistes à reconnaître les manifestations cliniques devant éveiller les soupçons quant à la présence d’un cancer du poumon chez les patients. Composition du comité Les membres du comité ont été choisis parmi les leaders régionaux en soins primaires du Réseau provincial des soins primaires et de la lutte contre le cancer d’Action Cancer Ontario et parmi les membres du Groupe sur le siège de la maladie, Cancer du poumon d’Action Cancer Ontario. Méthodes Les présentes lignes directrices sont le fruit d’une revue systématique des données probantes, d’une synthèse des données et d’un examen externe formel effectué par des intervenants canadiens qui ont validé la pertinence des recommandations. Rapport Ces lignes directrices fondées sur des données probantes ont été formulées pour améliorer la prise en charge en contexte canadien des patients qui présentent des manifestations cliniques du cancer du poumon. Conclusion Le dépistage et l’aiguillage précoces des patients atteints de cancer du poumon pourraient en fin de compte aider à réduire les morbidités et mortalités liées au cancer. Ces lignes directrices pourraient aussi s’avérer utiles dans la mise sur pied de programmes de diagnostic du cancer du poumon et pour aider les décideurs à veiller à ce que les ressources appropriées soient en place.

  11. Cooperation or Competition? The American and French Foreign Policies in Africa (Cooperation ou concurrence? La politique africaine de la France et des Etats-Unis en Afrique sub-saharienne)

    DTIC Science & Technology

    2007-11-02

    2004. Soudan, Frangois. < 4 ans de plus! >>. Jeune Afrique/l’Intelligent, num 2287, 7-13 novembre 2004. Talla, Blaise - Pascal . << Cameroun Lettre ouverte...ces relations privildgi~es. Pascal Chaigneau souligne que ’ cette politique [africaine], th6oris6e sous le g~n~ral de Gaulle, maintenue par Georges...continent. Pascal Chaigneau souligne que << cette politique [africaine], th~orisde sous le g~n~ral de Gaulle, maintenue par Georges Pompidou, perpdtu~e

  12. La classe d'anglais se batit-elle sur du sable? ou les avatars des categories grammaticales. (Is the English Class Built on Sand? Or the Ups and Downs of Grammatical Categories.)

    ERIC Educational Resources Information Center

    Bailly, Danielle

    1983-01-01

    The use of second language students' existing understanding of grammatical forms in their native language for second language instruction is examined, and the importance of knowing when to replace grammatical analysis with use of the target language is discussed. A slow process of discovering appropriate teaching techniques is foreseen. (MSE)

  13. Imagens do céu ontem e hoje - um multimídia interativo de astronomia e uma nova exposição no MAST

    NASA Astrophysics Data System (ADS)

    Caretta, C. A.; Lima, F. P.; Requeijo, F.; Vieira, G. G.; Alves, F.; Valente, M. E. A.; de Almeida, R.; de Garcia, G. C.; Quixadá, A. C.

    2003-08-01

    "Imagens do Céu Ontem e Hoje" é o título de uma nova exposição que está sendo inaugurada no Museu de Astronomia e Ciências Afins (MCT), que inclui experimentos interativos, maquetes, réplicas e 8 terminais de computador com um multimídia interativo sobre Astronomia para consulta dos visitantes. O multimídia apresenta um conteúdo bastante extenso, que engloba quase todos os temas em Astronomia, consistindo numa fonte de divulgação e pesquisa para um público que vai das crianças até estudantes universitários. O conteúdo está distribuído em mais de 500 páginas de texto divididas em 4 módulos: "O Universo", "Espectroscopia", "Telescópios" e "Observando o Céu". Cada módulo é subdividido em 5 seções, em média, cada uma iniciada por uma animação que ilustra os temas a serem abordados na seção. Ao final da animação, uma lista de temas é apresentada sob o título "Saiba Mais". Para exemplificar, o módulo "O Universo" contém as seguintes seções: "O Universo visto pelo homem", "Conhecendo o Sistema Solar", "Indo além do Sistema Solar", "Nossa Galáxia, a Via-Láctea" e "Indo mais além, a imensidão do Universo". A seção "Conhecendo o Sistema Solar", por sua vez, tem os seguintes temas: "A origem do Sistema Solar", "O Sol", "Os planetas", "Satélites, asteróides, cometas e outros bichos..." e "O Sistema Solar em números". Cada texto é repleto de imagens, quadros, desenhos, esquemas, etc, além de passatempos ao final de cada seção, incluindo jogos interativos, quadrinhos e curiosidades, que auxiliam o aprendizado de forma divertida. Apresentamos neste trabalho as idéias gerais que permearam a produção da exposição, e uma viagem pelo multimídia para exemplificar sua estrutura e conteúdo. O multimídia será posteriormente disponibilizado para o público externo pela página eletrônica do MAst e/ou por intermédio de uma publicação comercial.

  14. Base de linhas moleculares para síntese espectral estelar

    NASA Astrophysics Data System (ADS)

    Milone, A.; Sanzovo, G.

    2003-08-01

    A análise das abundâncias quí micas fotosféricas em estrelas do tipo solar ou tardia, através do cálculo teórico de seus espectros, emprega a espectroscopia de alta resolução e necessita de uma base representativa de linhas atômicas e moleculares com suas respectivas constantes bem determinadas. Nesse trabalho, utilizamos como ponto de partida as extensas listas de linhas espectrais de sistemas eletrônicos de algumas moléculas diatômicas compiladas por Kurucz para a construção de uma base de linhas moleculares para a sí ntese espectral estelar. Revisamos as determinações dos fatores rotacionais de Honl-London das forças de oscilador das linhas moleculares, para cada banda vibracional de alguns sistemas eletrônicos, seguindo a regra usual de normalização. Usamos as forças de oscilador eletrônicas da literatura. Os fatores vibracionais de Franck-Condon de cada banda foram especialmente recalculados empregando-se novas constantes moleculares. Reproduzimos, com êxito, as absorções espectrais de determinadas bandas eletrônicas-vibracionais das espécies moleculares C12C12, C12N14 e Mg24H em espectros de estrelas de referência como o Sol e Arcturus.

  15. Gradiente radial de [Mg/Fe] em duas galáxias elípticas

    NASA Astrophysics Data System (ADS)

    Milone, A.; Capelato, H.

    2003-08-01

    Basicamente, são propostos dois cenários de evolução quí mio-dinâmico para os sistemas esferoidais: (i) o hierárquico através da fusão e/ou acresção de sub-sistemas com ou sem surtos de formação estelar, e (ii) o colapso monolí tico dissipativo com formação estelar interrompida por um vento galáctico. Ambos, dentro de certos limites, conseguem explicar os gradientes internos de metalicidade estelar presentes nas galáxias elí pticas bem como a relação observada entre a metalicidade central e a massa (Mg20 vs. log sv0). No entanto, nenhum prevê uma variação interna para a razão de abundâncias Mg/Fe que indiretamente define a escala temporal da formação estelar. Empregamos a espectroscopia óptica de fenda longa com a finalidade de recuperar as histórias de formação estelar, de enriquecimento quí mico e da dinâmica dentro de determinadas regiões das galáxias. Os espectros de média resolução (FWHM = 7,1 Å) e escala angular de 1,092 arcsec/pixel foram coletados com o telescópio 1,60m do OPD/LNA. Comparamos nossas medidas de linhas de absorção com resultados espectrofotométricos de modelos de populações estelares simples - mais especificamente os í ndices do Sistema Lick como Mg2, Mg b, < Fe > e Hb - a fim de se investigar as variações internas de [Fe/H], [Mg/Fe] e idade. Para duas galáxias elí pticas, NGC 1052 e NGC 7796, pertencentes a ambientes de baixa densidade, encontramos uma variação radial da razão Mg/Fe decrescente do centro para fora em regiões de 0,6 e 1 raio efetivo respectivamente. Discutimos alguns cenários de enriquecimento quí mico para estas duas galáxias.

  16. Estudo de perturbações orbitais de satélites artificiais, considerando ressonância, através de transformações canônicas

    NASA Astrophysics Data System (ADS)

    Vilhena de Moraes, R.

    2003-08-01

    Aplicações recentes de satélites artificiais, principalmente aquelas com finalidades geodinâmicas ou altimétricas, requerem órbitas determinadas com bastante precisão. Em particular os satélites do sistema GPS, que têm sido envolvidos direta ou indiretamente em tais problemas, necessitam de ter suas órbitas muito bem conhecidas. As órbitas dos satélites GPS tem uma peculiaridade: o período orbital está em comensurabilidade 2: 1, aproximada, com o período de rotação da Terra. A existência de ressonâncias faz com que métodos usuais de teoria de perturbações não possam ser usados para se estudar órbitas com esta característica. No presente trabalho são apresentados dois processos para se estudar tal problema. Para tanto o sistema dinâmico que descreve o movimento orbital de satélites artificiais, perturbado por forças que derivem ou não de um potencial, incluindo ressonância, é inicialmente colocado em forma canônica estendida. Um dos processos apresentado é baseado na teoria de Lie-Hori e o outro em uma seqüência de transformações canônicas. Perturbações devidas ao geopotencial, ao arrasto atmosférico, à pressão de radiação solar direta (incluindo o efeito da sobra) e à ressonâncias do movimento orbital com o movimento de rotação da Terra são consideradas. Neste trabalho, sucintamente, os dois processos originais desenvolvidos em colaboração com o autor são apresentados. Simulações são feitas mostrando o efeito da ressonâncias 2: 1 na evolução temporal de elementos orbitais de satélites artificiais. Exemplos são exibidos para diversas órbitas considerando-se diferentes excentricidades e inclinações, incluindo às do tipo GPS.

  17. Caracterización del sistema fotométrico del VVV para el estudio de la subestructura en nuestra galaxia

    NASA Astrophysics Data System (ADS)

    Santucho, V.; Gurovich, S.; Dominguez, M.; Minniti, D.; Soto, M.; Amôres, E. B.

    In this work we calculate colour transformation equations between the VVV and 2MASS filters for bulge field stars. Our method involves matching stars from both surveys and include cuts to ensure that only sources with the best photometry are included in the calibration. Our bivariate weighted fits show that the transformation equations depend on galactic coordinates, so we provide local transformation calibrations, for each Tile. FULL TEXT IN SPANISH

  18. Investigacion del sistema ABS/PC a partir de material reciclado procedente del sector electrico y electronico. Caracterizacion y optimizacion de mezclas industriales

    NASA Astrophysics Data System (ADS)

    Balart Gimeno, Rafael

    In the last years, polymer blends have acquired great relevance due to the excellent performances that can be reached. Particularly, ABS/PC blends show a growing interest since they exhibit good thermal and mechanical performance. All these features make them useful for technical applications: electronics, automotive, house ware and office,...PC contributes to a good thermal and mechanical stability, while ABS contributes, fundamentally, to the improvement of processability and cost reduction. Considering the importance of these blends, it has been developed the possibility to recycle ABS and PC by blending systems, following the residue generation ratio (around 4:1 for ABS:PC). In this research, we have worked with polycarbonate coming from city lighting and a most common degree of ABS. Due to the nature and origin of recycled materials, it is important to know and to quantify the previous level of degradation of individual materials as well as the thermal behaviour of the blends to establish the possible interaction of the components. We have used calorimetric and spectrophotometric techniques to identify previous degradation and the presence of impurities in the recycled as well as the characterization of the blends. Thermogravimetric analysis has been used for kinetic study of degradation processes and thermal stability of ABS/PC system. We have also studied mechanical properties of ABS/PC system due to the partial miscibility of the system which involves a reduction on mechanical performance, particularly plastic properties such as impact strength while resistant properties show no important decrease. The small decrease on impact strength can be attributed to the degradation processes of butadiene present in the ABS and interphase interaction between partial miscible phases. The addition of PC improves thermal stability of the blend since the thermal resistance of the PC is higher than that of ABS. Mechanical properties stand with good equilibrium and the processability of blends is quite good. All this features contributes to a high viability of the blending process of ABS/PC from recycled materials.

  19. Diseño, Construcción Y Desarrollo De Un Sistema Limitado Por Difracción Para Telescopios Terrestres: Fastcam

    NASA Astrophysics Data System (ADS)

    Lopez Lopez, Roberto

    2013-02-01

    This work describes the concept, design, development, evolution and application of the FastCam instrument. FastCam is an image photometer for astronomy with image capture in a high-frequency range and diraction limited, in order to apply the Lucky Imaging technique to medium- and large-sized ( 1.5 to 4 m) telescopes. The Lucky Imaging technique allows, for ground-based telescopes, to achieve the resolution limit for astronomical images under suitable conditions. This work describes the atmospheric problems and the active and adaptive optics techniques to solve them, as well as the Lucky Imaging fundamentals. A description of the considerations to the project development and design parameters is performed. Then, the optical design and dierent adaptations to several telescopes will be revised. In a next step, some of the scientic results obtained thanks to this project are shown, both in position astronomy and complex structures in globular cluster and binary systems. Dierent designs arising from the basic idea and the instruments now in development that are expanding the system's capabilities and the technique are explained. Some other possible applications to other elds in which the image sharpness is necessary despite uctuations or instabilities of the observing system will be also pointed out: ophthalmology, video-control, etc.

  20. Osnovi polojenia na reformata v obrasovatelnata sistema na Narodna republika Bulgaria (Basic Provisions of the Reform of the Public Education System in the People's Republic of Bulgaria).

    ERIC Educational Resources Information Center

    Bulgarian Communist Party, Sofia.

    This document is an English language abstract (approximately 1,500 words) of the reform provisions of the Bulgarian education system as formulated by the Bulgarian Communist Party in 1969. These reforms include the following items: access to compulsory secondary education for all; enrollment of all six-year olds; teachers to be specialized from…

  1. El sistema fonologico del dialecto judeo-espanol de Bulgaria (The Phonological System of the Judeo-Spanish Dialect of Bulgaria)

    ERIC Educational Resources Information Center

    Kanchev, Ivan V.

    1974-01-01

    The phonetics and phonological system of the Bulgarian Judeo-Spanish dialect is discussed, showing its similarities to and borrowings from modern Spanish and Bulgarian. Treatment of phonemes is analyzed in detail. (Text is in Spanish.) (CK)

  2. A Handbook for Title I Migrant Parent Advisory Councils: Understanding the System=Un Folleto Para los Concilios de Padres Titulo I Migrante: Entendiendo el Sistema.

    ERIC Educational Resources Information Center

    Arredondo, C.; And Others

    A bilingual handbook for Title I migrant Parent Advisory Councils (PACs) was designed to be used by administrators, teachers, consultants and parents in organizing and training PACs at local, district, and state levels. All information is duplicated in separate English and Spanish sections. The first part discusses the Texas migrant program,…

  3. El humanismo y la educacion en diversos niveles del sistema educativo national (Humanism and Education at Different Levels of the National Education System).

    ERIC Educational Resources Information Center

    Consejo Nacional Tecnico de la Educacion (Mexico).

    This document is an English-language abstract (approximately 1,500 words) of six studies of the different levels of education and the humanistic content of the teaching program at each level. On the preschool level, it is stated that kindergarten education in Mexico attempts to put the small child in contact with the world that surrounds him.…

  4. Predlog teza o razvoju i usavrsavanju sistema obrazovanja i vaspitanja u SFRJ (Proposals for the Development and Advancement of the System of Education in Yugoslavia).

    ERIC Educational Resources Information Center

    Federal Assembly of the Socialist Federal Republic of Yugoslavia, Belgrade,

    This document is an English-language abstract (approximately 1,500 words) of a draft setting out an education system for Yugoslavia to be considered by the Federal Assembly. The proposals are divided into six chapters: (1) current trends and developments in education; (2) socioeconomic foundations of educational development; (3) changes in the…

  5. Sistema de Transferencia de Archivos para Estudiantes Migrantes: Un Mejor Entendimiento para Padres. (Migrant Student Record Transfer System: A Better Understanding for Parents).

    ERIC Educational Resources Information Center

    Jaramillo, Senaida I.

    When migrant children are enrolled in the Migrant Education Program, they are also enrolled in the Migrant Student Record Transfer System (MSRTS), a national system which accumulates educational and health information for each child on a computer located in Little Rock, Arkansas. The system affords teachers the opportunity to review the records,…

  6. Trazando el mapa genético de NGC 1316 a través de su sistema de cúmulos globulares

    NASA Astrophysics Data System (ADS)

    Sesto, L. A.; Faifer, F. R.; Forte, J. C.

    2015-08-01

    The giant early-type galaxy NGC 1316 (Fornax A) is an intermediate-age merger remnant (-- yrs), in which an unusual pattern of dust, formed by large filaments and dark structures, demands special attention. This galaxy belongs to Fornax, one of the closest and most studied galaxy clusters of the southern hemisphere. The dust structures pose an interesting challenge for photometry in the central regions. Based on the idea that Globular Clusters systems (GCS) constitute genuine tracers of the formation and evolution of galaxies that contain them, we present a multicolor photometric study of globular clusters candidates (GC) associated with NGC 1316. We performed the reduction and analysis of a mosaic of gri images obtained with the Gemini Multi-object Spectrograph (GMOS) camera, mounted on the Gemini South telescope. These GMOS data were combined with BVIgz photometry from the HST Advanced Camera for Surveys (ACS) as well as with published Washington photometry, and used to define a multicolor grid. This grid will be used to attempt to identify the properties of the different subpopulations of CG present in NGC 1316.

  7. Distribuciones Espectrales de Energía de las compañeras visibles en sistemas binarios que albergan agujeros negros de masas estelares

    NASA Astrophysics Data System (ADS)

    Cúneo, V. A.; Gómez, M. N.

    Stellar mass black holes are mainly detected in binary systems; where the compact object accretes material from its visible compa-nion. With the objective of characterizing visible companions; we analyse the Spectral Energy Distributions (SEDs) of a sample of these objects; selected from a galactic stellar black holes catalogue built by the authors. Using the VOSA SED Analyzer; we obtained; from several catalogues; the fluxes to construct the SEDs. A black body for a single star was adjusted for every observed SED. The excesses found between these distributions are attributed to the presence of the compact object. FULL TEXT IN SPANISH

  8. [Rethinking how health is promoted in the Colombian general health-related social security system (Sistema General de Seguridad Social en Salud)].

    PubMed

    Eslava-Castañeda, Juan C

    2006-12-01

    This article takes stock of how promoting health (PH) (promoción de la salud - PS) has been understood within an international setting and gives three meanings for promotion: as general policy orientation, as a set of actions and as a special dimension of sanitary work. Interest expressed in giving it a specific basis distinguishing it from prevention, transcending educational work, has emerged from the subtle differences established from such different ways of coming to terms with PH. After recognising the challenge posed by PH in the field of health, the text succinctly describes how discourse regarding PH has been introduced in Colombia and discusses how an attempt has been made to be more precise regarding its place in the general health-related social security system. Efforts currently being made in Colombia regarding making PH become a reality within the Colombian health system are then mentioned.

  9. Sistemas Eólicos Pequeños para Generación de Electricidad: Una guia para consumidores en Nuevo México

    SciTech Connect

    Not Available

    2005-10-01

    This Spanish version of the popular Small Wind Electric Systems: A New Mexico Consumer's Guide provides consumers with information to help them determine whether a small wind electric system can provide all or a portion of the energy they need for their home or business based on their wind resource, energy needs, and economics. Topics include how to make a home more energy efficient, how to choose the correct turbine size, the parts of a wind electric system, how to determine whether enough wind resource exists, how to choose the best site for a turbine, how to connect a system to the utility grid, and whether it's possible to become independent of the utility grid using wind energy. In addition, the cover of the guide contains a list of contacts for more information.

  10. Sistemas de Documentacion e Informacion Educativa en Belgica, Paises Bajos y Francia (Educational Documentation and Information Systems in Belgium, Holland, and France).

    ERIC Educational Resources Information Center

    Rossi Etchelouz, Nelly Yvis

    This booklet describes the working and organization of the information and documentation systems in Belgium, the Netherlands, and France. The discussion begins with a look at the Belgium educational system and how information services operate within that system. The central library, specialized services, and specialized information centers are all…

  11. Aplicaciones del sistema GPS en la búsqueda de sitios para Interferometría Astronómica Milimétrica

    NASA Astrophysics Data System (ADS)

    Meza, A.; Fernández, L.; Natali, P.; Moirano, J.; Brunini, C.

    The water vapor content of the atmosphere is the biggest restriction to the Millimeter and Sub-millimeter Astronomy. It also plays a crucial role in most of the atmospheric processes. Nowadays water vapor is one of the less characterized meteorological parameter. It is a highly variable atmospheric constituent and its presence is a limiting factor to the obtention of high angular resolutions in interferometric observations of astrophysical interest. Thus, the improved determination of the percentage of precipitable water vapor (PWV) is widely appreciated when performing a site testing for Millimeter Astronomy (MA). It is extensive the use of Water Vapor Radiometers (WVRs) for characterizing the PWV. Using its typical frequency the WVR monitors at 22 Ghz., but some of them had been specially designed for MA at 183 Ghz (M.C. Wiedner, Atmospheric Water Vapour and Astronomical Millimetre Interferometry, PhD Thesis, 1998). Another possibility for PWV determinations are the Radiosondes (RS). A RS is a nothing but a set of sensors and radio transmitters carried out by a balloon up to 30.000 mts. They register twice a day (at 0 UTC and 12 UTC) the values of temperature, humidity and atmospheric pressure as a function of the altitude. All the observations are immediately transmitted to a ground station. At the beginning of the '90s GPS started to be used as an approach to the remote sensing of atmospheric water vapor (Bevis et al, Geophys. Res., 97, 15787, 1992). The radio signal GPS is delayed by the atmosphere as it propagate from the satellites to the ground-receivers. The tropospheric delay is modeled as the add of two contributions: a ``dry" and a ``wet" delay. Each of them is calculated as the product of a zenith path delay by a mapping function depending on the elevation angle. An estimate of the zenith wet delay can be transformed into an estimate of the PWV (Bevis et al, 1992; Hogg et al., A&A, 95, 304, 1981). Any of the former techniques can determine the PWV with an accuracy better than 1 millimeter of PWV. In this work we use the GPS to estimate the PWV. The procedure followed here is having comparable precision and accuracy with respect to the classical techniques (Coster et al., GPS-96, 625, 1996).

  12. Work-related mental disorders and their inclusion in health policies in the Brazilian Unified Health System (Sistema Único de Saúde).

    PubMed

    Cocchiola-Silva, Rafaela A

    2016-03-01

    This study discusses the inclusion of mental disorders as work-related diseases in occupational health policies in Brazil. Mental disorders first appeared as a group of occupational diseases in 1999. Establishing mental disorders as occupational diseases was a result of the confluence of several factors: a broader notion of health, a positive shift in public perception regarding preconceived judgements relating to mental disorders and the improvement in the process that defines social security benefit entitlements due to the implementation of a new methodology in 2007.

  13. Tracking and Treating Mobile Populations. The TB Net System. Migrant Clinicians Network Monograph Series. = El Sistema de Red para la TB.

    ERIC Educational Resources Information Center

    Migrant Clinicians Network, Inc., Austin, TX.

    A comprehensive tracking and referral network that helps provide continuity of care for mobile populations with active tuberculosis (TB) or TB infection is considered essential for effective treatment of TB. However, the interstate referral system that exists between state health departments has been highly inefficient for serving migrant…

  14. Develando las propiedades del sistema inexplorado de cúmulos globulares de NGC 5044 a través de Gemini+GMOS

    NASA Astrophysics Data System (ADS)

    Scalia, M. C.; Faifer, F.; Smith Castelli, A.; Forte, J. C.; Cellone, S.; Bassino, L.

    2016-08-01

    We present the first photometric characterization and determination of radial velocities of globular cluster (GC) candidates belonging to the system of the elliptical galaxy NGC5044. This rich system presents several thousand candidates and its bimodal color distribution is dominated by blue GCs. We have spectroscopically confirmed 27 members of the system, with an averaged radial velocity of 2833kms. One of the confirmed members is a strong candidate to be the first Ultra-Compact Dwarf discovered in NGC5044.

  15. Detecção inesperada de efeitos de lentes fracas em grupos de galáxias pouco luminosos em raios-X

    NASA Astrophysics Data System (ADS)

    Carrasco, R.; Mendes de Oliveira, C.; Sodrã©, L., Jr.; Lima Neto, G. B.; Cypriano, E. S.; Lengruber, L. L.; Cuevas, H.; Ramirez, A.

    2003-08-01

    Obtivemos, como parte do programa de verificação científica do GMOS Sul, imagens profundas de três grupos de galáxias: G97 e G102 (z~0,4) e G124 (z = 0,17). Esses alvos foram selecionados a partir do catálogo de fontes extensas de Vikhlinin (1998), por terem luminosidades em raios X menores que 3´1043 ergs s-1, valor cerca de uma ou duas ordens de grandeza inferior ao de aglomerados de galáxias. O objetivo primário dessas observações é o estudo da evolução de galáxias em grupos. Grupos são ambientes menos densos que aglomerados, contêm a grande maioria das galáxias do Universo mas que, até o momento, foram estudados detalhadamente apenas no Universo local (z~0). Com esses dados efetuamos uma análise estatística da distorção na forma das galáxias de fundo (lentes gravitacionais fracas) como forma de inferir o conteúdo e a distribuição de massa nesses grupos apesar de que, em princípio, esse efeito não deveria ser detectado uma vez que os critérios de seleção adotados previlegiam sistemas de baixa massa. De fato, para G124 obtivemos apenas um limite superior para sua massa que é compatível com sua luminosidade em raios X. De modo contrário e surpreendente, os objetos G102 e G097, aparentam ter massas que resultariam em dispersões de velocidade maiores que 1000 km s-1, muito maiores do que se espera para grupos de galáxias. Com efeito, para G097 obtivemos, a partir de dados do satélite XMM, uma estimativa para a temperatura do gás intragrupo de kT = 2,6 keV, que é tipica de sistemas com dispersões de velocidade de ~ 600 km s-1, bem característica de grupos. Essas contradições aparentes entre lentes fracas e raios X podem ser explicadas de dois modos: i) a massa obtida por lentes estaria sobreestimada devido à superposição de estruturas massivas ao longo da linha de visada ou ii) a temperatura do gás do meio intra-grupo reflete o potencial gravitacional de estruturas menores que estariam se fundindo para formar uma

  16. TIBIOTARSAL COMPRESSION ARTHRODESIS USING A LATERAL LOCKING PLATE.

    PubMed

    Coughlin, Michael J; Nery, Caio; Baumfeld, Daniel; Jastifer, James

    2012-01-01

    Objetivos: A artrodese tibiotársica (TT) continua sendo uma importante opção no tratamento da artrose primária ou pós-traumática do tornozelo mas persiste ainda a controvérsia sobre o melhor método de fixação do foco de artrodese. Independentemente do tipo de material utilizado, o objetivo maior é a obtenção da fusão articular sólida, saudável e indolor. O propósito do presente estudo é apresentar os resultados preliminares de um novo sistema de placa bloqueada lateral compressiva para a artrodese do tornozelo. Método: Treze pacientes consecutivos portadores de artrose tibiotársica foram submetidos à artrodese do tornozelo nove pacientes eram homens e quatro mulheres. Com o auxílio de um guia, as superfícies articulares do talo e da tíbia foram decorticadas. Um sistema de compressão foi aplicado para evitar o alinhamento indesejável dos segmentos e uma placa bloqueada pré-moldada lateral foi utilizada para obter a fusão articular. Resultados: Tanto o escore AOFAS quanto o VAS melhoraram com a cirurgia. Todos os tornozelos operados consolidaram dentro do prazo de seis meses. Em todos os pacientes, foi obtido um ótimo alinhamento nos planos sagital, coronal e transverso. Conclusão: Acreditamos que a combinação de compressão bilateral, cortes ósseos com contornos pré-demarcados e placa lateral bloqueada, constitui uma técnica moderna, segura e útil para a artrodese do tornozelo.

  17. Condições físicas do disco de acréscimo da nova-anã V4140 SGR

    NASA Astrophysics Data System (ADS)

    Borges, B.; Baptista, R.

    2003-08-01

    Discos de acréscimo são aparatos cósmicos que permitem que matéria seja eficientemente acrescida sobre uma fonte compacta pela remoção de momento angular via tensões viscosas enquanto transforma a energia potencial gravitacional em calor e, posteriormente, em radiação. Sistemas binários semi-ligados, como Variáveis Cataclísmicas (VCs) não-magnéticas, são talvez os melhores ambientes encontrados para o estudo da física desses discos de acréscimo. O desenvolvimento de técnicas de imageamento indireto, como o mapeamento por eclipses (MME) e a tomografia Doppler, permitiu avanços importantes na compreensão da física dos processos de acréscimo desses sistemas. V4140 Sagitarii é uma VC eclipsante de curto período orbital (~ 90 min) que não havia sido classificada como nova-anã ou polar. Neste trabalho apresentamos a análise do mapeamento por eclipse feito com dados de fotometria CCD nas bandas B, V e R de V4140 Sgr realizada no LNA. O objeto foi observado no declínio de erupção em julho de 1992 e em erupção em julho de 2001, isso indicou a classificação do sistema como uma nova-anã. A análise, feita sobre os mapas já apresentados em trabalho anterior, apresenta (i) diagrama cor-cor, que indica uma emissão opticamente espessa nas partes internas do disco em quiescência (R < RL1); (ii) diagrama cor-magnitude, usado para inferir uma distância de 600 +/- 10 pc ao sistema; (iii) a distribuição radial de temperatura observada que concorda com a lei de disco espesso em estado estacionário TµR-3/4, com temperaturas em torno de 10000 K e 3000 K ns partes internas e externas do disco em quiescência, respectivamente; (iv) a evolução da distribuição de temperatura no declínio de erupção; (v) estimativa da transferência de massa de 109.9+/-0.1 M¤/ano em quiescência, similar àquelas observadas em novas-like. O sistema é comparado à outras novas-anãs (e.g. OY Car e Z Cha) em quiescência e erupção, mostrando-se tratar um

  18. Aquisição fonológica do português brasileiro por crianças ouvintes bilíngues bimodais e surdas usuárias de implante coclear

    PubMed Central

    Cruz, Carina Rebello; Finger, Ingrid

    2014-01-01

    Resumo O presente estudo investiga a aquisição fonológica do Português Brasileiro (PB) por 24 crianças ouvintes bilíngues bimodais, com acesso irrestrito à Língua Brasileira de Sinais (Libras), e por 6 crianças surdas que utilizam implante coclear (IC), com acesso restrito ou irrestrito à Libras. Para a avaliação do sistema fonológico das crianças em PB, foi utilizada a Parte A, Prova de Nomeação, do ABFW – Teste de Linguagem Infantil (ANDRADE et al. 2004). Os resultados revelaram que as crianças ouvintes bilíngues bimodais e a criança surda usuária de IC com acesso irrestrito à Libras apresentaram processo de aquisição fonológica esperada (normal) para a sua faixa etária. Considera-se que a aquisição precoce e o acesso irrestrito à Libras podem ter sido determinantes para o desempenho dessas crianças no teste oral utilizado. PMID:25506105

  19. Conference Proceedings on Ionospheric Modification and Its Potential to Enhance or Degrade the Performance of Military Systems Held in Bergen, Norway on 28-31 May 1990 (La Modification de l’Ionosphere et son Potentiel d’Amelioration ou de Degradation des Performances des Systemes Militaires)

    DTIC Science & Technology

    1990-05-31

    experts appointed by the National Dele~ates, the Consultant and Exchange Programme and the Aerospace Applications Studies Prgam. T’he results of AGARD...facilities were specially built both in the West and in the Soviet Union, to study their characteristics. Special issues of a number of journals have been...irregularities uniqucly well studied by a satellite in situ pass. The background ionosphere was smooth to a small fraction of a percent. The satellite entering

  20. Reply to Comment on "The Jurassic-Cretaceous basaltic magmatism of the Oued El-Abid syncline (High Atlas, Morocco): Physical volcanology, geochemistry and geodynamic implications" by André Michard et al. (2013) [J. Afr. Earth Sci. 88 (December) (2013) 101-105

    NASA Astrophysics Data System (ADS)

    Bensalah, Mohamed Khalil; Youbi, Nasrrddine; Mata, João; Madeira, José; Martins, Línia; Font, Eric; Medina, Fida; Marzoli, Andrea; Hachimi, Hind El; Bertrand, Hervé; Bellieni, Giuliano; Doblas, Miguel; Mahmoudi, Abdelkader; Beraâouz, El Hassane; Miranda, Rui; Verati, Chrystèle; Min, Angelo De; Abbou, Mohamed Ben; Zayane, Rachid

    2016-06-01

    We welcome the comment by Michard et al. (2013) as it gives us the opportunity to better discuss the Jurassic-Cretaceous magmatism of the High Atlas (Morocco). In their comment, Michard et al. (2013) focus on three main points which are: (i) the age of the basalts from Naour, (ii) the structural history of the Central High Atlas and (iii) the geodynamic significance of the related Jurassic-Cretaceous magmatism. We will address these questions in the following sections.

  1. Use or Reduction of Propagation and Noise Effects in Distributed Military Systems: Electromagnetic Wave Propagation Panel Symposium Held in Rethymno, Crete, Greece on 15-18 October 1990 (Utilisation ou Reduction des Effets de la Propagation et du Bruit dans les Systemes Militaires Distribues)

    DTIC Science & Technology

    1991-06-01

    6liminables est une fonction croissante du nombre de capteurs du reseau, les systtmes La Direction des Recherches, Etudes et Techniques ’basses...cozmmo cola oat naturel dana le cas AVAReat ~temin6A patirde toisoi lVon traite un prof il do liaison parambtros qui d~finissent les types be...varitiondesm~dineshoraresdirect., cosine cola oat naturel locales sur un profil do liaison loraque Vlon consid~ro des probl&Mes donn6, au cours du temnps

  2. Délais de prise en charge des syndromes coronariens aigus avec sus-décalage du segment ST à Ouagadougou et facteurs associés à un allongement de ces délais: étude transversale à propos de 43 cas colligés au CHU-Yalgado Ouédraogo

    PubMed Central

    Yameogo, Nobila Valentin; Samadoulougou, André; Millogo, Georges; Kologo, Koudougou Jonas; Kombassere, Karim; Toguyeni, Boubacar Jean Yves; Zabsonre, Patrice

    2012-01-01

    La prise en charge de l'infarctus du myocarde est une course contre la montre et les trois premières heures constituent les « golden hours ». Les objectifs de ce travail étaient de déterminer le délai de prise en charge des infarctus du myocarde du myocarde au Burkina Faso, les facteurs liés à un allongement du délai et le pronostic des patients. Il s'agit d'une étude transversale descriptive menée de Septembre 2010 à Août 2011. Le critère d'inclusion était l'infarctus du myocarde dont le diagnostic était basé sur des critères clinique (douleur angineuse), électrocardiographique (sus-décalage persistant du segment ST dans au moins deux dérivations contiguës du même territoire coronaire, onde Q de nécrose) et biologique (élévation de la troponine). Les informations relatives au délai de prise en charge ont été recueillies: début du premier symptôme, contact avec le premier agent de santé et le cardiologue, nombre de centre de santé consulté avant le transfert en cardiologie, situation géographique des patients, moyen de transport utilisé. Les données ont été analysées grâce au logiciel SPSS version 17. Durant la période d’étude, 43 patients d’âge moyen de 56,51 ± 12,91 ans ont été admis pour infarctus du myocarde. Plus de la moitié des patients (72,0%) habitait Ouagadougou et sa banlieue. Le délai moyen entre le début de la douleur et la consultation dans la première structure sanitaire était de 48 ± 20,8 heures; celui entre le début de la douleur et la réalisation du premier ECG était en moyenne de 8,6 ±4,5 jours. Le délai entre la réalisation de l'ECG et l'admission dans le service de cardiologie était de 4,35 ±4,0 jours [00 heure et 13 jours]. Le délai entre l'admission dans le service de cardiologie et la thrombolyse était de 34 minutes. Enfin le délai entre le début de la douleur et le contact avec le cardiologue était de 9,6±3,5 jours. Il n'y avait pas de différence statiquement significative (P = 0,076) entre le délai de consultation des malades résidant en campagne et ceux résidant en ville. Le moyen de déplacement le plus utilisé était les transports en commun (67,4%). Aucun patient n’était référé par un transport médicalisé. Aucun patient n’était référé après la première consultation dans une structure sanitaire. Seuls 6 patients étaient référés avec le diagnostic de SCA ST+. L’âge de plus de 60 ans (P = 0,016), la prescription des antalgiques (p =0,021) et le niveau socioéconomique faible (P= 0,038) étaient également des facteurs associés à un allongement des délais de prise en charge. La reperfusion myocardique était constituée par la thrombolyse à la streptokinase qui a été réalisée chez 2 patients. La coronarographie n'a pas été réalisée. L’évolution a été marquée par 5 décès (11,6%). la prise en charge des infarctus du myocarde au Burkina Faso est caractérisée par de très longs délais. Elle n'est de ce fait pas optimale. PMID:23396976

  3. Les mammiferes aquatiques: lexique anglais-francais des mammiferes marins actuels ou recemment disparus, y compris les especes d'eau douce des groupes surtout marins (Aquatic Mammals: English-French Glossary of Livinq or Recently Extinct Marine Mammals, Including the Fresh Water Species of Prevalently Marine Groups).

    ERIC Educational Resources Information Center

    Nekrassoff, Vladimir N.

    1980-01-01

    Introduces a new glossary of aquatic mammals representing recent taxonomic revisions. Describes its design, which consists of the glossary proper, listing the scientific name of each entry followed by its English and French equivalents, and of two indexes, listing other common names for the same entries referred back to the scientific term. (MES)

  4. Evaluation du potentiel radiosensibilisateur ou radioprotecteur/antioxydant de quelques composes selectionnes par dosimetrie par gel de polyacrylamide et dosimetre de Fricke, et utilisation de la filamentation par impulsion laser infrarouge fenitoseconde comme un nouveau et puissant faisceau pour la radiotherapie du cancer

    NASA Astrophysics Data System (ADS)

    Meesat, Ridthee

    In radiation treatment, a sufficiently high radiation dose must be delivered to the tissue volumes containing the tumor cells while the lowest possible dose should be deposited in surrounding healthy tissue. We developed an original approach that is fast and easy to implement for the early assessment of the efficiency of radiation sensitizers and protectors. In addition, we characterized a new femtosecond laser pulse irradiation technique. We are able to deposit a considerable dose with a very high dose rate inside a well-controlled macroscopic volume without deposition of energy in front or behind the target volume. The radioprotective efficiency was measured by irradiation of the Fricke solution incorporating a compound under study and measuring the corresponding production of ferric ions G(Fe3+). The production of ferric ions is most sensitive to the radical species produced in the radiolysis of water. We studied experimentally and simulated with a full Monte-Carlo computer code the radiation-induced chemistry of Fricke/cystamine solutions. Results clearly indicate that the protective effect of cystamine originates from its radical-capturing ability, which allows this compound to compete with the ferrous ions for the various free radicals - especially ·OH radicals and H· atoms - formed during irradiation of the surrounding water. The sensitizing capacity of radiation sensitizers was measured by irradiation of a polyacrylamide gel (PAG) dosimeter incorporating a compound under study and measuring the corresponding increase in the gradient between spin-spin relaxation rate (R2) and absorbed dose. We measured an irradiation energy-dependent increase in R 2-dose sensitivity for halogenated compounds or a decrease for radioprotectors. Finally, we studied a novel laser irradiation method called "filamentation". We showed that this phenomenon results in an unprecedented deposition of energy and the dose rate thus achieved exceeds by orders of magnitude values previously reported for the most intense clinical radiotherapy systems. Moreover, the length of the dose-free entrance region was adjusted by selecting the duration of femtosecond laser pulses. In addition, we provided evidence that the biological damage caused by this irradiation was similar to other ionizing radiation sources. Keywords: Radiotherapy, radiosensitization, radioprotection, laser, filamentation, dosimetry.

  5. Le Juge de paix et le gardien de la paix, ou le probleme de la determination dans le complement du nom ("Le juge de paix et le gardien de la paix," or the Problem of Determination in the Object of a Noun Phrase).

    ERIC Educational Resources Information Center

    Coulon, R.

    1979-01-01

    Presents an analysis of noun phrases in which the definite article is used and omitted. Several studies are reviewed and two types of occurrences are distinguished: direct (agent, instrument, object) and oblique (locative, dative). The relationships, perceptible in the deep structure, are blurred in the transformations leading to surface…

  6. Mesures spectroscopiques de constituants et de polluants atmosphériques par techniques in situ et à distance, au sol ou embarquéesSpectroscopic measurements of atmospheric constituents and pollutants by in situ and remote techniques from the ground and in flight

    NASA Astrophysics Data System (ADS)

    Camy-Peyret, Claude; Payan, Sébastien; Jeseck, Pascal; Té, Yao

    2001-09-01

    Infrared spectroscopy is a powerful tool for precise measurements of atmospheric trace species concentrations through the use of characteristic spectral signatures of the different molecular species and their associated vibration-rotation bands in the mid- or near-infrared. Different methods based on quantitative spectroscopy permit tropospheric or stratospheric measurements: in situ long path absorption, atmospheric absorption/emission by Fourier transform spectroscopy with high spectral resolution instruments on the ground, airborne, balloon-borne or satellite-borne.

  7. Abundâncias espectroscópicas de simbióticas amarelas

    NASA Astrophysics Data System (ADS)

    Calbo, S. R.; Costa, R. D. D.

    2003-08-01

    Este trabalho consiste no estudo de uma amostra de estrelas simbióticas amarelas cujas componentes frias apresentam tipos espectrais G ou K. Uma amostra de 20 estrelas foi usada, o que corresponde ao conjunto completo de estrelas simbióticas amarelas visíveis no hemisfério sul presentes no catálogo de Belczynski et al (2000 A&A Suppl. 146, 407). Os espectros estelares foram obtidos por observações usando os telescópios de 1,6 m do LNA e 1,52 m do ESO e os dados fornecidos pelo satélite IUE (International Ultraviolet Explorer) e posteriormente reduzidos no IAG. Os fluxos das linhas medidas de cada espectro foram calibrados em fluxo (com as correções de avermelhamento baseados no trabalho de Pacheco e Costa 1992, A&A 257, 619), e os parâmetros físicos (temperatura e densidade eletrônica) das nebulosas que envolvem os sistemas simbióticos determinados, usando-se fluxos medidos de OIII e NII da parte visível do espectro. Para a determinação das razões de abundâncias de C/N e O/N aplicou-se o método de Nussbaumer et al. (1988, A&A 198, 179). As razões de abundâncias foram derivadas das linhas de emissão (NIV, CIV, OIII, NIII e CIII) dos espectros IUE. Numa última fase plotou-se o diagrama C/N-O/N onde comparou-se a abundância química das simbióticas amarelas obtidas neste trabalho com as de gigantes normais. Os resultados mostram abundâncias compatíveis com aquelas derivadas para nebulosas planetárias do bojo, indicando que o material nebular é originado das gigantes vermelhas de cada sistema, e não da fonte quente. (FAPESP, CNPq)

  8. Rotação do jato em DG tau próximo à região de sua formação: análise comparativa das velocidades radiais simuladas e observadas

    NASA Astrophysics Data System (ADS)

    Cerqueira, A. H.; de Gouveia dal Pino, E. M.

    2003-08-01

    Os modelos magneto-centrífugos utilizados para explicar a formação dos jatos Herbig-Haro assumem a presença de um disco de acresção em rotação kepleriana na base de lançamento do jato. Neste cenário, o jato transmite a informação da rotação do disco para regiões distantes da fonte central, além da superfície de Alfvén, na região de colimação inicial do jato. Recentemente, Bacciotti et al. (2002, ApJ, 537, L49) obtiveram pela primeira vez uma evidência observacional de rotação em um jato HH, o jato em DG Tau, em regiões próximas da fonte central, compatível (qualitativa e quantitativamente) com o esperado a partir dos modelos magneto-centrífugos para a produção e colimação inicial de jatos HH. No presente trabalho, apresentamos mapas de velocidade radial, obtidos através de simulações numéricas tri-dimensionais SPH, para um jato com características semelhantes ao jato em DG Tau, objetivando uma comparação com os mapas de velocidade radiais obtidos por Bacciotti et al.. Nossos resultados, embora preliminares, indicam que a inclusão de efeitos como a precessão, evidenciada em DG Tau (Dougados et al. 2000, A&A, 357, L61) devem ser levadas em consideração na análise da presença de rotação não só em DG Tau mas em qualquer sistema, com o uso das velocidades radias observadas. A ausência de um grau elevado de simetria axial (quebrada, por exemplo, pela precessão do eixo do jato; ou pela presença de uma superfície interna de trabalho, ou seja, um bow shock interno), implica também em uma maior complexidade nos mapas, com conseqüências relevantes para suas interpretações.

  9. [Efficacy of the Vaccines Against Human Papillomavirus in Women Older than 24 Years in the Cervix Cancer Prevention].

    PubMed

    Pimenta Ribeiro, Jaime; Borges, Isabel

    2016-06-01

    Introdução: O cancro do colo do útero é o quarto tipo de cancro feminino mais comum e o segundo mais frequente nas mulheres entre os 15 e os 44 anos. A infeção pelo vírus do papiloma humano é condição necessária na quase totalidade dos casos de cancro do colo do útero; trata-se de uma doença sexualmente transmissível e todas as mulheres sexualmente ativas estão em risco de contrair infeção. Atualmente existem três vacinas contra o vírus do papiloma humano, e apesar da sua eficácia estar bem comprovada nas mulheres até aos 25 anos, não está totalmente estabelecida em idades superiores.Material e Métodos: Realizou-se uma revisão da literatura sobre a evidência atual relativa à eficácia das vacinas contra o vírus do papiloma humano nas mulheres com mais de 24 anos na prevenção do cancro do colo do útero e foi avaliada a qualidade da evidência segundo o sistema GRADE.Resultados: Foram identificados dois estudos controlados randomizados relevantes para a análise que envolveram um total de 9 571 participantes – 4 792 no grupo vacinado e 4 779 no grupo controlo – e reportaram dados relativos a 48 meses de follow-up. A redução do risco relativo foi de 41% (95% CI: 29 a 50%), – favorável para o grupo vacinado. Não existiram diferenças entre a segurança e tolerabilidade das vacinas nos grupos vacina e controlo.Conclusão: A evidência atual demonstra que as vacinas contra o vírus do papiloma humano 16 e/ou 18 nas mulheres com mais de 24 e até aos 45 anos apresentam uma eficácia importante na redução do risco de desenvolver infeção persistente e/ou adquirir lesões precursoras de cancro do colo do útero.

  10. [Relational and reproductive trajectories leading to adolescent pregnancy in Portugal: a national and regional characterization].

    PubMed

    Pires, Raquel; Pereira, Joana; Pedrosa, Anabela Araújo; Bombas, Teresa; Vilar, Duarte; Vicente, Lisa; Canavarro, Maria Cristina

    2014-01-01

    Introdução: Este estudo pretendeu caracterizar as trajetórias relacionais e reprodutivas conducentes à gravidez na adolescência em Portugal, explorando a existência de especificidades regionais.Material e Métodos: O estudo decorreu entre 2008 e 2013 em 42 serviços de saúde públicos. A amostra, nacionalmente representativa, incluiu 459 grávidas com idades entre os 12 e os 19 anos. Os dados foram obtidos por autorrelato, através de uma ficha de caracterização construída para o efeito.Resultados: Independentemente de terem tido um (59,91%) ou múltiplos parceiros sexuais (40,09%), as adolescentes engravidaram de forma mais frequente numa relação de namoro, utilizando contraceção à data da conceção e tendo identificado a falha contracetiva que esteve na origem da gravidez (39,22%). A nível regional, outras trajetórias surgiram com elevada prevalência, refletindo opções como a decisão de engravidar (Alentejo/Açores), a não utilização de contraceção (Centro/Madeira) ou a sua utilização ineficaz sem que a falha contracetiva fosse identificada (Madeira). As relações de namoro revelaram-se maioritariamente duradouras (> 19 meses), com homens mais velhos (> 4 anos) e fora do sistema de ensino (75,16%); estes resultados foram particularmente expressivos quando a gravidez foi planeada.Discussão: O conhecimento gerado por este estudo reflete a necessidade de investir em abordagens preventivas que atendam às necessidades específicas das jovens de cada região e integrem a população masculina de maior risco.Conclusão: Os nossos resultados podem contribuir para o delineamento de políticas de saúde mais eficazes e para uma atuação multidisciplinar mais informada ao nível da educação sexual e do planeamento familiar nas diferentes regiões do país.

  11. Astronomia Motivadora no Ensino Fundamental

    NASA Astrophysics Data System (ADS)

    Melo, J.; Voelzke, M. R.

    2008-09-01

    O objetivo principal deste trabalho é procurar desenvolver o interesse dos alunos pelas ciências através da Astronomia. Uma pesquisa com perguntas sobre Astronomia foi realizada junto a 161 alunos do Ensino Fundamental, com o intuito de descobrir conhecimentos prévios dos alunos sobre o assunto. Constatou-se, por exemplo, que 29,3% da 6ª série responderam corretamente o que é eclipse, 30,0% da 8ª série acertaram o que a Astronomia estuda, enquanto 42,3% dos alunos da 5ª série souberam definir o Sol. Pretende-se ampliar as turmas participantes e trabalhar, principalmente de forma prática com: dimensões e escalas no Sistema Solar, construção de luneta, questões como dia e noite, estações do ano e eclipses. Busca-se abordar, também, outros conteúdos de Física tais como a óptica na construção da luneta, e a mecânica no trabalho com escalas e medidas, e ao utilizar uma luminária para representar o Sol na questão do eclipse, e de outras disciplinas como a Matemática na transformação de unidades, regras de três; Artes na modelagem ou desenho dos planetas; a própria História com relação à busca pela origem do universo, e a Informática que possibilita a busca mais rápida por informações, além de permitir simulações e visualizações de imagens importantes. Acredita-se que a Astronomia é importante no processo ensino aprendizagem, pois permite a discussão de temas curiosos como, por exemplo, a origem do universo, viagens espaciais a existência ou não de vida em outros planetas, além de temas atuais como as novas tecnologias.

  12. Self-Image Development: A Chicano Enfasis. Self-Programmed Counseling and Self-Programmed Control. Instructor's Guide = Desarrollo de la Imagen Propia: Enfasis en el Chicano. Sistema de Consejo y Control Auto-Programado. Manuel del Profesor.

    ERIC Educational Resources Information Center

    Mireles, S. Raymond

    Self-Programmed Counseling, the instructor's guidance, and Self-Programmed Control (SPC), the student's response, was initially developed by Title III Project USTED (United Students and Teachers for Educational Development) for Mexican American students on academic probation to use on a non-credit, special group counseling basis. As part of a…

  13. "Buddy System": A Pedagogical Innovation to Promote Online Interaction (Sistema de amigos: una innovación pedagógica para fomentar la interacción en línea)

    ERIC Educational Resources Information Center

    Espitia Cruz, Martha Isabel; Kwinta, Anna

    2013-01-01

    Recent technological development has created new pedagogical practices in the EFL classroom to maximize the time for students to use the language by considering online tools. Whilst working in a pedagogical context with new technologies, some educators were concerned with how online interaction in EFL content-based classes could be effectively…

  14. Informe: Agua potable - la EPA necesita adoptar medidas adicionales para garantizar que los pequeños sistemas de agua comunitarios señalados como graves infractores logren cumplir con las normas

    EPA Pesticide Factsheets

    Informe #16-P-0108, 22 de Marzo de 2016. La EPA puede proteger mejor al público del agua potable contaminada, lo que incluye a casi 200,000 personas en Puerto Rico que todavía carecen de agua potable segura.

  15. Pautas para Organizar Una Actividad de Capacitacion: Un Seminario-Taller para el Desarrollo de Personal de Direccion de Sistemas Educativos (Guidelines to Organize a Training Activity: A Workshop for Management Development of Educational Systems).

    ERIC Educational Resources Information Center

    Valle, Victor M.

    Often personnel performing managerial functions within educational systems are educators with almost no training in management. This paper presents ideas on how to organize a training activity intended to develop management knowledge and skills among educational systems officials and to implement an organizational self-study on management…

  16. La Capacitacion de Docentes Como Prioridad de los Sistemas Educativos de America Latino y al Caribe (In-Service Teacher Training as a Priority of Latin American and Caribbean Educational Systems).

    ERIC Educational Resources Information Center

    Valle, Victor M.

    Whenever top-level officials in Latin American and Caribbean educational systems are approached, the topic of inservice teacher training is presented as a major priority. This paper outlines some ideas about the subject of inservice teacher training as a priority of educational systems in Latin American and Caribbean countries. The most frequent…

  17. Primera Reunion de la Comision Nacional de Analisis y Evaluacion del Sistema Educativo: Informe Final (The First Meeting of the National Committee for Analysis and Evaluation of the Educational System: Final Report).

    ERIC Educational Resources Information Center

    Ministerio de Cultura y Educacion, Buenos Aires (Argentina). Centro National de Documentacion e Informacion Educativa.

    This document contains the legislation creating the National Committee for Analysis and Evaluation of the Educational System and the final report of that committee's first meeting. The report deals with each level from elementary to higher education. For each level it describes and considers curriculum, school buildings, human resources, current…

  18. Metric System Resource Units = Unidades de Trabajo del Sistema Metrico Decimal. K-12. Project C.A.M.B.I.O., Changing Attitudes towards Metrics for Bilingual Instruction & Operations.

    ERIC Educational Resources Information Center

    Pulido, Josefina; Almendares, Simon

    Four resource units are included in this document. For each, general objectives on knowledge and concepts, skills, and attitudes are given; content is outlined; and some suggestions for initiating the unit are listed. The first unit, on measuring length, provides six lesson plans, to teach about the meter, the smaller units of the meter, units…

  19. Memorias Conferencia Internacional IEEE Mexico 1971, Sobre Sistemas, Redes Y Computadoras. Volumen I and Volumen II. (Proceedings of International Conference of IEEE Concerning Systems, Networks, and Computers. Volume I and Volume II.

    ERIC Educational Resources Information Center

    Concheiro, A. Alonso, Ed.; And Others

    The following papers in English from this international conference may be of particular interest to those in the field of education. T. Nakahara, A. Tsukamota, and M. Matsumoto describe a computer-aided design technique for an economical urban cable television system. W. D. Wasson and R. K. Chitkara outline a recognition scheme based on analysis…

  20. Investigacion educativa. El sistema escolar en sus diferentes niveles, factores que favorecen o frenan su eficacia y medidas de superacion (Educational Research. The Educational System at Different Levels; Factors Promoting or Hindering Its Efficiency; Possible Improvements.

    ERIC Educational Resources Information Center

    Jimenez Lozano, Blanca; And Others

    This document is an English-language abstract (Approximately 1,500 words) of a study on educational research in Mexico. Chapter one discusses the importance of educational research, in terms of its role both in scientific and technical development; it should use scientific methods so that it will have solid foundations. Chapter two is a survey of…

  1. Edades y metalicidades de cinco cúmulos estelares proyectados en dirección a la Nube Menor de Magallanes: implicaciones sobre los procesos de formación y evolución de estos sistemas

    NASA Astrophysics Data System (ADS)

    Piatti, A. E.; Santos, J. F. C.; Clariá, J. J.; Bica, E.; Sarajedini, A.; Geisler, D.

    Washington photometry of the 5 star clusters Lindsay 32, Lindsay 38, Kron 28, Kron 44 and Lindsay 116 and their surrounding fields located towards the Small Magellanic Cloud (SMC) is presented for the first time. From the color-magnitude diagrams, cleaned from field stars contamination, the cluster and SMC field reddenings, ages and metallicities are determined. The ages - derived from the difference in the T1 magnitude betweem the giant clump and the Main Sequence turnoff point - vary between 2 and 6 Gyr, and the metallicities ([Fe/H]) between -1.65 and -1.10. Lindsay 116 is located closer to the Large Magellanic Cloud (LMC) than to the SMC and its fundamental parameters suggests a higher probability of belonging to the LMC. The results obtained in this work, combined with previous estimates of age and metallicity for other seven clusters, allow us to draw the following conclusions: (1) There does not exist an age-position relation in the SMC, but a age-metallicity one. (2) The chemical enrichment in the SMC has been very efficient during the last 5 Gyr. (3) The SMC clusters formation and evolution can be better represented by a bursting star formation process than by a continuum star formation mechanism.

  2. Estudio de la interacción de mareas en sistemas exoplanetarios observados: Estimación de las probabilidades de captura en resonancias espín-órbita

    NASA Astrophysics Data System (ADS)

    Luna, S. H.; Melita, M. D.; Navone, H. D.

    2016-08-01

    This article is mainly concerned with the problem of determining the most likely rotation state of exoplanets HD 154088 b and HD 85512 b. To achieve this objective, Darwin-Kaula formalism is used in order to obtain expressions for the tidal torque. The triaxially caused torque of each planet is also considered. The description of the deformation is based on the Andrade rheology. Two methods are described for the estimation of the probability capture in the spin-orbit resonances , and ; these are the brute force method and the semi-analytic method. Due to the uncertainty in the values of the eccentricity, only the semi-analytic method was used to compute the probability of capture as a function of the eccentricity, covering its uncertainty range.

  3. Cough: neurophysiology, methods of research, pharmacological therapy and phonoaudiology.

    PubMed

    Balbani, Aracy Pereira Silveira

    2012-04-01

    Introdução: A tosse é o sintoma respiratório mais comum em crianças e adultos.Objetivo: Apresentar uma revisão sobre a neurofisiologia e os métodos para estudo do reflexo da tosse, bem como a farmacoterapia e terapia fonoaudiológica da tosse, baseada nos trabalhos publicados entre 2005 e 2010 e indexados nas bases Medline, Lilacs e Biblioteca Cochrane sob os unitermos “tosse” ou “antitussígenos”.Síntese dos dados: O reflexo da tosse envolve ativação de múltiplos receptores vagais nas vias aéreas e de projeções neurais do núcleo do trato solitário para outras estruturas do sistema nervoso central. Técnicas experimentais permitem estudar o reflexo da tosse ao nível celular e molecular para desenvolver novos agentes antitussígenos. Não há evidências de que antitussígenos isentos de prescrição médica tenham eficácia superior à do placebo para o alívio da tosse. A terapia fonoaudiológica pode beneficiar pacientes com tosse crônica refratária ao tratamento farmacológico, sobretudo quando coexiste movimento paradoxal das pregas vocais.Comentários Finais: A abordagem multidisciplinar tem papel fundamental no diagnóstico etiológico e tratamento da tosse. O otorrinolaringologista deve informar os pacientes sobre os riscos dos antitussígenos de venda livre a fim de prevenir intoxicações e efeitos adversos, especialmente em crianças.

  4. Far Away from the Revolution: Understanding the Cuban Revolutionary Armed Forces Mission Changes

    DTIC Science & Technology

    2011-12-01

    Party) SPE Sistema de Perfeccionamiento Empresarial TRD Tiendas para la Recaudacion de Divisas (Shops for the Collection of Foreign Currency...foundation of major industries in Cuba known as Sistema de Perfeccionamiento Empresarial - SPE (official policy to guide the full restructuring of the...officers were sent to Europe to study western business methods, techniques of economic management and production. The sistema de perfeccionamiento

  5. Requirement Analysis: Evaluating the Degree of Heterogeneity for Determining an Appropriate Basis for Contract Award

    DTIC Science & Technology

    2006-06-01

    27 Sistema de Información al Comercio Exterior (Foreign Trade Information System). Integrated multilingual dictionary of trade terms...determined by the responsible entity. 28 Sistema de Información al Comercio Exterior (Foreign...http://www.pcc.gov.tw/eng/indexE.htm Sistema de Información al Comercio Exterior (Foreign Trade Information System). Integrated multilingual

  6. Gravity Effects in Small-Scale Structural Modeling

    DTIC Science & Technology

    1988-12-01

    attenuating material (Reference 23). The materials tested were cellular concrete with fly ash, expanded polystyrene concrete with fly ash, foamed...polyurethane, foamed sulfer and molded expanded polystyrene . The studies showed that with proper adjustments in the cement content, water-cement ratio and foam...Compression (Ou,c) 4000 100 Tension (Ou,t) 400 10 E/Quc 1000 1000 Ou,c/Ou,t 10 10 Further analysis of the properties of expanded polystyrene concrete with

  7. The Legacy and Impact of Open University Women's/Gender Studies: 30 Years On

    ERIC Educational Resources Information Center

    Kirkup, Gill; Whitelegg, Elizabeth

    2013-01-01

    In 1983, the UK Open University (OU) offered its first women's/gender studies (WGS) course. Although a late entrant to the area, OU WGS courses were influential nationally and internationally for many feminists and WGS teachers and scholars. Not only did OU WGS courses have the largest WGS student cohort of any UK institution with over 8000…

  8. Something for Everyone? The Different Approaches of Academic Disciplines to Open Educational Resources and the Effect on Widening Participation

    ERIC Educational Resources Information Center

    Coughlan, Tony; Perryman, Leigh-Anne

    2011-01-01

    This article explores the relationship between academic disciplines' representation in the United Kingdom Open University's (OU) OpenLearn open educational resources (OER) repository and in the OU's fee-paying curriculum. Becher's (1989) typology was used to subdivide the OpenLearn and OU fee-paying curriculum content into four disciplinary…

  9. Online Library Accessibility Support: A Case Study within the Open University Library

    ERIC Educational Resources Information Center

    Mears, Wendy; Clough, Helen

    2015-01-01

    The Open University (OU) is the UK's largest distance education provider and has a large and growing disabled student population. Disabled user support presents particular challenges for an online library service in the distance learning environment. The OU introduced guidelines for working with non-OU--authored content (external content) in 2011…

  10. Dealing with spatial heterogeneity

    NASA Astrophysics Data System (ADS)

    Marsily, Gh.; Delay, F.; Gonçalvès, J.; Renard, Ph.; Teles, V.; Violette, S.

    2005-03-01

    Heterogeneity can be dealt with by defining homogeneous equivalent properties, known as averaging, or by trying to describe the spatial variability of the rock properties from geologic observations and local measurements. The techniques available for these descriptions are mostly continuous Geostatistical models, or discontinuous facies models such as the Boolean, Indicator or Gaussian-Threshold models and the Markov chain model. These facies models are better suited to treating issues of rock strata connectivity, e.g. buried high permeability channels or low permeability barriers, which greatly affect flow and, above all, transport in aquifers. Genetic models provide new ways to incorporate more geology into the facies description, an approach that has been well developed in the oil industry, but not enough in hydrogeology. The conclusion is that future work should be focused on improving the facies models, comparing them, and designing new in situ testing procedures (including geophysics) that would help identify the facies geometry and properties. A world-wide catalog of aquifer facies geometry and properties, which could combine site genesis and description with methods used to assess the system, would be of great value for practical applications. On peut aborder le problème de l'hétérogénéité en s'efforçant de définir une perméabilité équivalente homogène, par prise de moyenne, ou au contraire en décrivant la variation dans l'espace des propriétés des roches à partir des observations géologiques et des mesures locales. Les techniques disponibles pour une telle description sont soit continues, comme l'approche Géostatistique, soit discontinues, comme les modèles de faciès, Booléens, ou bien par Indicatrices ou Gaussiennes Seuillées, ou enfin Markoviens. Ces modèles de faciès sont mieux capables de prendre en compte la connectivité des strates géologiques, telles que les chenaux enfouis à forte perméabilité, ou au contraire les faci

  11. Spotlight on medicinal chemistry education.

    PubMed

    Pitman, Simone; Xu, Yao-Zhong; Taylor, Peter; Turner, Nicholas; Coaker, Hannah; Crews, Kasumi

    2014-05-01

    The field of medicinal chemistry is constantly evolving and it is important for medicinal chemists to develop the skills and knowledge required to succeed and contribute to the advancement of the field. Future Medicinal Chemistry spoke with Simone Pitman (SP), Yao-Zhong Xu (YX), Peter Taylor (PT) and Nick Turner (NT) from The Open University (OU), which offers an MSc in Medicinal Chemistry. In the interview, they discuss the MSc course content, online teaching, the future of medicinal chemistry education and The OU's work towards promoting widening participation. SP is a Qualifications Manager in the Science Faculty at The OU. She joined The OU in 1993 and since 1998 has been involved in the Postgraduate Medicinal Chemistry provision at The OU. YX is a Senior Lecturer in Bioorganic Chemistry at The OU. He has been with The OU from 2001, teaching undergraduate courses of all years and chairing the master's course on medicinal chemistry. PT is a Professor of Organic Chemistry at The OU and has been involved with the production and presentation of The OU courses in Science and across the university for over 30 years, including medicinal chemistry modules at postgraduate level. NT is a Lecturer in Analytical Science at The OU since 2009 and has been involved in the production of analytical sciences courses, as well as contributing to the presentation of a number of science courses including medicinal chemistry.

  12. Laterally-Biased Quantum IR Detectors

    DTIC Science & Technology

    2013-10-23

    Sistemas Optoelectronicos y Microtecnologia Calle Ramiro de Maeztu 7 Madrid 28040 SPAIN EOARD Grant 12-3006 Report Date: October 2013 Final...Universidad Politecnica de Madrid Instituto de Sistemas Optoelectronicos y Microtecnologia Calle Ramiro de Maeztu 7 Madrid 28040 SPAIN 8. PERFORMING...Z39-18 Laterally-biased quantum IR detectors – Report Nov 2013 1 EOARD - Award No. FA8655-12-1-3006 Instituto de Sistemas Optoelectrónicos

  13. Worldwide Report, Telecommunications Policy, Research and Development, No. 258

    DTIC Science & Technology

    2007-11-02

    3379, December 1979. [20] F. Vatalaro: Caratteristiche di un filtro digitale dpplicato al sistema DME di precisione per MLS, F.U.B., Relazione 43...Spring 1980. [8] F. Chiarini, M. Gori: Possibilitä di miglioramento della precisione di un DME in banda L öfferta da u’n sistema di antenne a...Vecchio, G. Pedrini, F. Vatalaro: Rapporto sul programma per la determinazione delta forma d’onda impulsiva ottima per un sistema DME di precisione in

  14. [Laparoscopic surgery of gastroesophageal reflux in children].

    PubMed

    Dias, Ana; Amaral, Marina; Trindade, Eunice; Dias, Jorge Amil; Campos, Miguel; Estevão-Costa, José

    2013-01-01

    Introdução: O refluxo gastroesofágico na criança é frequente e geralmente inócuo. Contudo, perante doença de refluxo gastroesofágico pode impor-se o tratamento cirúrgico, o qual pode ser realizado por via clássica ou laparoscópica. No presente estudo pretende-se avaliar a exequibilidade, eficácia e segurança da cirurgia antirrefluxo (fundoplicatura de Nissen) por via laparoscópica com ênfase no recém-nascido, lactente e primeira infância.Material e Métodos: Estudaram-se as crianças com refluxo gastroesofágico propostas para cirurgia por via laparoscópica entre janeiro 2006 e dezembro 2012 num Serviço de Cirurgia Pediátrica de um Hospital universitário. Realizou-se uma análise descritiva e comparativa por faixa etária (grupo I: <1 ano, grupo II: 1-3 anos, grupo III: > 3 anos) e presença de comorbilidades. Foram avaliados os seguintes parâmetros: demografia, sintomatologia, comorbilidades, indicações operatórias, perioperatório e evolução pós-operatória. Foi assumido um nível de significância de 5%.Resultados: Foram propostas 55 crianças, das quais 12 do grupo I, 15 do grupo II e 28 do grupo III. 50,9% apresentavam comorbilidades (21 com doença do sistema nervoso central e sete com atresia esofágica). Em 52 (94,5%) casos, a cirurgia foi exequível exclusivamente por via laparoscópica. A duração do procedimento foi de 167 ± 42 minutos, sem diferenças significativas entre grupos etários, mas superior na doença do sistema nervoso central. Com um seguimento de 35,5 ± 23,9 meses, ocorreram as seguintes complicações: síndrome de gas-bloat, dumping e disfagia em oito casos (15,7%) e hérniaparaesofágica em dois casos (3,9%), sem diferenças significativas entre os grupos; verificou-se recidiva clínica com reoperação em dois casos.Conclusão: A fundoplicatura de Nissen laparoscópica é um procedimento exequível, eficaz e com baixa morbilidade, inclusive em recém-nascidos, lactentes e na primeira infância.

  15. Final Environmental Assessment, Outgrant for Construction and Operation of a Solar Photovoltaic System in Area I, Nellis Air Force Base, Clark County, Nevada

    DTIC Science & Technology

    2011-03-01

    metro de d•sltlbuoloo de energfa. El sistema perm itirla a los 1Q a 15 megavallos de conionte alltma de enefgla renovables I Ia base aer&a de NeUls...oparacl6ra de un sistema solar fotovojtaico compuesto por paneles solares y una nueva linea de metro de dstrib,UCi6n de energia . El sistema P.Srtnitirfa a...los tO a 15 megavatios de eonieflte alterna de energfa renovables a Ia base aerea de Nel!js. La locallzaci6n propuesta para el sistema fotovoltaico

  16. [Epidemiological and Demographic Characteristics of Patients with Head and Neck Tumours in the Northern Portugal: Impact on Survival].

    PubMed

    Estêvão, Roberto; Santos, Tiago; Ferreira, Ana; Machado, Anabela; Fernandes, João; Monteiro, Eurico

    2016-10-01

    Introdução: Em Portugal não existem, ainda, estudos epidemiológicos e demográficos realizados em doentes portadores de tumores da cabeça e pescoço. Os objectivos desta análise são descrever os aspectos epidemiológicos e demográficos dos doentes portadores de tumores malignos da cabeça e do pescoço, referenciados ao serviço de Otorrinolaringologia de um centro oncológico do norte de Portugal e avaliar o impacto destas características na sobrevivência. Material e Métodos: Estudo retrospectivo descritivo, dos doentes referenciados entre janeiro de 2011 e dezembro de 2013 ao Serviço de Otorrinolaringologia do Instituto Português de Oncologia do Porto. Foram incluídos 566 doentes. As variáveis analisadas foram a localização anatómica dos tumores, o estadiamento, o género e a idade dos doentes, o distrito de proveniência, os hábitos etílicos e tabágicos, o nível educacional, a profissão, o estado civil e a estrutura familiar.Resultados: Os 566 doentes estudados correspondem a 498 homens e 68 mulheres, com idade média de 58,1 ± 12,2 anos. A maioria (80,5%) foi referenciada com doença em estadio avançado (III e IV). Verificamos hábitos etílicos moderados a excessivos em 78% dos doentes e 69% eram fumadores. A grande maioria dos doentes (82,3%) tinha apenas o ensino básico. Os doentes com tumores da hipofaringe e com hábitos etílicos excessivos foram referenciados em estadios mais avançados e apresentaram pior sobrevivência (p < 0,001). Os doentes casados foram referenciados em estadios mais precoces (p = 0,020) e os doentes sem apoio familiar apresentaram pior sobrevivência (p = 0,030). Discussão: Os dados epidemiológicos encontrados estão de acordo com a literatura internacional. A elevada taxa de doentes referenciados em estádio avançado pode ser atribuída ao atraso na procura de cuidados médicos ou a factores inerentes ao sistema de referenciação. A vigilância e o suporte familiar têm um papel

  17. [Magnetic Resonance Imaging Conversion Predictors of Clinically Isolated Syndrome to Multiple Sclerosis].

    PubMed

    Peixoto, Sara; Abreu, Pedro

    2016-11-01

    Introdução: A síndrome clinicamente isolada é uma forma de apresentação da esclerose múltipla, doença desmielinizante crónica do sistema nervoso central, e define-se por um único episódio clínico sugestivo de desmielinização. Porém, doentes com esta síndrome podem não desenvolver novos sintomas ou lesões, mesmo após longos períodos de seguimento, não cumprindo os critérios de diagnóstico da doença. Aqui serão revistas, na síndrome clinicamente isolada, as alterações na ressonância magnética que melhor predizem a conversão em esclerose múltipla. Material e Métodos: Pesquisaram-se na base de dados da PubMed artigos publicados entre janeiro de 2010 e junho de 2015 usando os termos ‘clinically isolated syndrome’, ‘cis’, ‘multiple sclerosis’, ‘magnetic resonance imaging’, ‘magnetic resonance’ e ‘mri’. Resultados: Carga lesional, localização das lesões, critérios de Barkhof e áreas/volumes de estruturas cerebrais foram as alterações na ressonância magnética convencional encontradas nos artigos incluídos nesta revisão. As técnicas não convencionais estudadas foram a dupla inversão-recuperação, a transferência de magnetização, a espectroscopia e a imagem de tensor de difusão. Discussão: Enquanto o número de lesões e a sua localização têm um papel claro na previsão da conversão da síndrome clinicamente isolada em esclerose múltipla, as técnicas não convencionais e as restantes alterações na ressonância magnética necessitam de mais estudos para confirmar a sua capacidade de prever o desenvolvimento da doença. Conclusão: Para além do valor preditivo das alterações já citadas, no futuro, diferentes achados neurorradiológicos na síndrome clinicamente isolada poderão ser considerados para os critérios de diagnóstico da esclerose múltipla e/ou modificar as recomendações sobre o seu tratamento.

  18. [Diabetes mellitus and its influence on the success of endodontic treatment: a retrospective clinical study].

    PubMed

    Ferreira, Manuel Marques; Carrilho, Eunice; Carrilho, Francisco

    2014-01-01

    Introdução: A diabetes mellitus é uma doença endócrina onde estão envolvidas as hormonas produzidas pelos ilhéus de Langerhans. A diabetes mellitus pode afetar várias funções do sistema imunitário do indivíduo, predispondo-o para a inflamação crónica, degradação progressiva dos tecidos e diminuição da reparação tecidular. Das alterações provocadas por esta doença ao nível da cavidade oralpode-se destacar a xerostomia, disgeusia, alterações periodontais, aumento da suscetibilidade à infeção e alterações tanto ao nível da polpa dentária como nos tecidos periapicais.Objetivos: O objetivo deste trabalho é avaliar a influência da diabetes mellitus ao nível dos tecidos periapicais e no sucesso dos tratamentos endodônticos nestes doentes.Material e Métodos: Foram analisados 737 casos clínicos tratados na consulta da Área de Medicina Dentária, a que foram feitos tratamentos endodônticos não cirúrgicos, entre os anos de 2003 e 2012. Destes foram selecionados os doentes com diabetes mellitus, num total de 32, dos quais 23 se dispuseram a vir à consulta e a participar neste estudo. Os dados recolhidos foram analisados no software Statistical Package for the Social Sciences, versão 19, a um nível de significância de 5%.Resultados: Foram avaliados 37 dentes no grupo teste e 25 no grupo controlo. Para os parâmetros analisados relativos ao diagnóstico pulpar, mobilidade, presença de fístula, dor à percussão horizontal e vertical, avaliação da restauração definitiva e intervalo de tempo entre a consulta de obturação e a restauração definitiva e/ou a consulta de controlo, não foram verificadas diferenças estatisticamente significativas (p > 0,05). Em relação à avaliação do sucesso dos tratamentos endodônticos realizados, este foi de 62% nogrupo de teste e de 80% no grupo controlo (p > 0,05).Conclusões: Os resultados deste estudo não são conclusivos em relação ao aumento da prevalência da periodontite

  19. [Postoperative recovery of blood in patients undergoing total knee or hip arthroplasty].

    PubMed

    Laranjeira, Hugo; Coimbra, Celeste; Fernandes, Nuno; Pinho, Romeu; Anjos, Rui; Mesquita, Elisabeth; Barros, António; Ferreira, Rita; Borges, Lúcia

    2013-01-01

    Introdução: Na artroplastia total do joelho e na artroplastia total da anca ocorrem perdas de sangue consideráveis, sendo necessário recorrer frequentemente a transfusões de concentrado de eritrócitos. No entanto, para além dos potenciais riscos inerentes, o sangue homólogo é um recurso limitado e caro. No sentido de reduzir o recurso a transfusões homólogas, tem-se desenvolvido estratégias alternativas, como a recuperação pós-operatória de sangue.Objetivos: Avaliação da implementação da recuperação pós-operatória de sangue no consumo de concentrado de eritrócitos no período pós-operatório e no tempo de internamento, pela avaliação retrospetiva de doentes submetidos a artroplastia total do joelho ou a artroplastia total da anca.Material e Métodos: Os 976 doentes foram divididos em 2 grupos: CELL TRANS – doentes submetidos à intervenção após a implementação da recuperação pós-operatória de sangue e CONT – submetidos à intervenção antes da implementação da estratégia referida. O número de unidades de concentrado de eritrócitos administradas foi obtido pela análise das requisições ao Serviço de Imunohemoterapia e o tempo de internamento foi obtido através do Sistema de Apoio ao Médico. A análise estatística foi realizada com recurso à linguagem R, considerando-se diferenças significativas entre os grupos quando p < 0,05.Resultados: Após a introdução da recuperação pós-operatória de sangue, 29% dos doentes submetidos a artroplastia total do joelho e 38% dos doentes submetidos a artroplastia total da anca receberam concentrado de eritrócitos no período pós-operatório, um número consideravelmente menor ao observado antes da implementação da estratégia, 68% e 59% respetivamente. Concomitantemente, verificou-se uma redução estatisticamente significativa no tempo de internamento de 9,0 para 8,3 dias para o caso dos doentes submetidos a artroplastia total do joelho e de 9,1 para 8,8 dias para o

  20. The Science Teachers and Their way of Thinking about Astronomy. (Spanish Title: Los Profesores de Ciencias y Sus Formas de Pensar la Astronomía.) Os Professores de Ciências e Suas Formas de Pensar a Astronomia

    NASA Astrophysics Data System (ADS)

    Leite, Cristina; Hosoume, Yassuko

    2007-12-01

    ómicos y la estructura espacial del montaje del Universo son características fundamentales. Muchos indican Sol y estrellas como cosas distintas: el Sol es un objeto caliente y las estrellas son frías. Esos resultados nos preocupan y ciertamente señalan una urgencia de programas de formación continuada para profesores en el contenido de astronomía, pues los PCN's (Parámetros Curriculares Nacionales) recomiendan con énfasis la enseñanza de este contenido. O modo de pensar dos professores de Ciências do ensino fundamental sobre os elementos da Astronomia é o objeto de pesquisa presente neste artigo, cuja metodologia consiste em entrevistas semiestruturadas, filmadas em vídeo e centradas numa perspectiva tridimensional dos elementos astronômicos, possibilitando um mapeamento das concepções das formas e das dimensões da Terra, do Sol, da Lua, dos planetas e das estrelas, bem como da concepção de céu e de Universo como um todo. Os resultados indicam um Universo contendo: Sol, estrelas, planetas e Lua, onde o Sistema Solar é parte do todo. Algumas vezes o Universo é concebido como o próprio Sistema Solar. Os objetos estão no céu ou no Universo o qual, para muitos, se restringe ao espaço que está acima da Terra. A forma plana dos objetos astronômicos e a estrutura espacial da montagem do Universo são características marcantes. Muitos indicam Sol e estrelas como coisas diferentes: Sol é um objeto quente e as estrelas são frias. Esses resultados nos preocupam e certamente sinalizam uma urgência de programas de formação continuada para professores no conteúdo de astronomia, uma vez que os PCN's indicam fortemente o ensino desse conteúdo.

  1. Evolução química em galáxias compactas azuis (BCGs)

    NASA Astrophysics Data System (ADS)

    Lanfranchi, G. A.; Matteucci, F.

    2003-08-01

    Neste trabalho, a formação estelar e evolução quí mica em galáxias Compactas Azuis (Blue Compact Galaxies - BCGs) foram estudadas através da comparação de previsões de modelos de evolução quí mica a várias razões de abundância quí mica observadas nestas galáxias. Modelos detalhados com recentes dados de nucleossí ntese e que levam em consideração o papel desempenahdo por supernovas de ambos os tipos (II e Ia) na evolução galáctica foram desenvolvidos para as BCGs permitindo seguir a evolução de vários elementos quí micos (H, D, He, C, N, O, Mg, Si, S, Ca, e Fe). O modelo é caracterizado pelas prescrições adotadas para a formação estelar, a qual ocorre em vários surtos de atividade separados por longos perí odos quiescentes. Após ajustar os melhores modelos aos dados observacionais, as previsões destes modelos foram comparadas também a razões de abundância observadas em sistemas Damped Lyman alpha (DLAs) e a origem do N (primária ou secundária) foi discutida. Alguns dos resultados obtidos são: i) as razões de abundância observadas nas BCGs são reproduzidas por modelos com 2 a 7 surtos de formação estelar com eficiência entre n = 0.2-0.9 Gano-1; ii) os baixos valores de N/O observados nestas galáxias são um resultado natural de uma formação estelar em surtos; iii) os modelos para BCGs podem reproduzir os dados dos DLAs, iv) uma quantidade "baixa" de N primário produzido em estrelas de alta massa pode ser uma explicação para os baixos valores de [N/a] observados em DLAs.

  2. Estimativa de imagens solares soho através de redes neurais artificiais

    NASA Astrophysics Data System (ADS)

    Andrade, M. C.; Fernandes, F. C. R.; Cecatto, J. R.; Rios Neto, A.; Rosa, R. R.; Sawant, H. S.

    2003-08-01

    A Rede Neural Artificial (RNA), no âmbito da teoria computacional, constitui uma teoria emergente que, por possuir habilidade em aprender a partir de dados de entrada, encontra diferentes aplicações em diferentes áreas. Um exemplo é a utilização de RNA na caracterização de padrões associados à dinâmica de processos espaço-temporais relacionados a fenômenos físicos não-lineares. Para obter informações sobre o comportamento destes fenômenos físicos utiliza-se, em diversos casos, seqüências de imagens digitalizadas, onde a caracterização de alguns fenômenos espaço-temporais é o procedimento mais viável para descrever a dinâmica das regiões ativas do Sol. Com base em imagens observadas por telescópios a bordo de satélites, estudos de previsão de eventos solares podem ser programados, permitindo prever possíveis efeitos posteriores nas regiões mais próximas da Terra (tempestades geomagnéticas e irregularidades ionosféricas). Neste trabalho avaliamos o desempenho da RNA para estimar padrões espaço-temporais, ou seja, imagens solares em ultravioleta, obtidas através do telescópio a bordo do satélite SOHO. Os resultados mostraram que as RNA conseguem generalizar os padrões de maneira satisfatória sem perder de forma significativa os principais aspectos da configuração global da atmosfera solar, comprovando a eficácia da RNA como ferramenta para esse tipo de aplicação. Portanto, este trabalho comprova a viabilidade de uso desta ferramenta em projetos voltados ao estudo do comportamento solar, em trabalhos do grupo de Física do Meio Interplanetário (FMI) na DAS e em programas desenvolvidos pelo Núcleo de Simulação e Análise de Sistemas Complexos (NUSASC) do Laboratório Associado de Computação e Matemática Aplicada (LAC) do INPE.

  3. Adults with Down syndrome: characterization of a Portuguese sample.

    PubMed

    Breia, Paula; Mendes, Rosário; Silvestre, Ana; Gonçalves, Maria Joao; Figueira, Maria Joao; Bispo, Regina

    2014-01-01

    Introdução: A síndrome de Down ou Trissomia 21 afeta o desenvolvimento físico, comportamental e cognitivo. No decurso do envelhecimento, a ocorrência de comorbilidades aumenta nesta população, sendo a sua deteção e tratamento precoces determinantes na sua qualidade de vida. Objetivo: Analisar numa amostra de adultos com síndrome de Down a existência de doenças médicas comuns, uso regular de medicação, eventual disfunção cognitiva e capacidades de comunicação oral. Material e Métodos: Foram coletados os dados sociodemográficos e clínicos de 209 adultos portugueses (20 - 58 anos), com síndrome de Down. Vinte e seis indivíduos foram avaliados com a WAIS-III. Os dados foram analisados estatisticamente - SPSS (v.19). Resultados: Quase metade da amostra (47,36%) sofre de comorbilidades, sendo as doenças cardíacas, psiquiátricas, epilepsia e hipotiroidismo as mais prevalentes. Setenta e dois indivíduos (34,45%) tomam medicação com ação no sistema nervoso central. Na WAIS-III, os valores de QI situam-se entre 45-61 (m = 49,65, dp = 4,93) existindo 141 indivíduos (67,5%) capazes de se expressar através de linguagem oral básica. Discussão: Os indivíduos desta amostra são vulneráveis a várias comorbilidades. A maioria tem linguagem oral básica, mas os valores de QI situam-se na faixa ‘extremamente baixo’, sendo melhor o desempenho em tarefas verbais. Conclusão: As limitações cognitivas e dificuldades comunicacionais na população com síndrome de Down podem condicionar o reconhecimento clínico precoce de comorbilidades que lhe estão associadas no decurso do envelhecimento. A valorização semiológica, com apoio do cuidador, é essencial para garantir que os cuidados de saúde adequados são prestados a esta população.

  4. Nebulosas planetárias galácticas: idades e cinemática

    NASA Astrophysics Data System (ADS)

    Lago, L. G.; Maciel, W. J.

    2003-08-01

    As nebulosas planetárias são formadas a partir de estrelas com massas entre 0.8 e 8 massas solares na sequência principal, formando um conjunto de objetos com idades e populações diferentes. Esse fato torna as nebulosas interessantes ao estudo da rotação galáctica, uma vez que as populações mais jovens devem estar claramente associadas ao disco fino da Galáxia, enquanto que as populações mais velhas estariam associadas ao disco espesso ou mesmo ao halo galáctico. Neste trabalho, utilizamos uma grande amostra de nebulosas com velocidades radiais conhecidas para determinar a curva de rotação da Galáxia. Para minimizar os erros decorrentes das incertezas nas distâncias, usamos quatro diferentes escalas estatísticas. Para a atribuição da idade dos objetos, utilizamos o método proposto recentemente por Maciel et al. (Astron. Astrophys. 397, 667, 2003), em um estudo da variação temporal dos gradientes de abundâncias. Com esse método, é possível obter uma classificação das nebulosas por grupos de idade, totalmente independente de outros sistemas de classificação, uma vez que as idades são estimadas individualmente, a partir das metalicidades das nebulosas. Nossos resultados são comparados com as previsões dos tipos de Peimbert, e mostram que os desvios médios das curvas obtidas são sensivelmente menores nos casos dos objetos mais jovens, associados ao disco fino, com relação aos objetos mais velhos do disco espesso, levando à determinação de uma curva de rotação semelhante à dos objetos de população I jovem. (CNPq)

  5. 2004 Space Report: Environment and Strategy for Space Research at NATO’s Research and Technology Organisation (RTO) (Compte rendu Espace 2004 : Environnement et strat gie de la recherche spatiale de l’Organisation pour la recherche et la technologie de l’OTAN)

    DTIC Science & Technology

    2007-02-01

    génération de l’OTAN, la participation à la résolution du recouvrement de fréquence entre GALILEO et les satellites de navigation radio GPS, un projet ...Les demandes de documents RTO ou AGARD doivent comporter la dénomination « RTO » ou « AGARD » selon le cas, suivi du numéro de série. Des informations...documents RTO ou AGARD doivent comporter la dénomination « RTO » ou « AGARD » selon le cas, suivie du numéro de série (par exemple AGARD-AG-315). Des

  6. Development policy for the Brazilian health industry and qualification of national public laboratories.

    PubMed

    Viana, Ana Luiza d'Ávila; Silva, Hudson Pacifico da; Ibañez, Nelson; Iozzi, Fabíola Lana

    2016-11-03

    Technological innovations play a decisive role in societies' development by contributing to economic growth and the population's welfare. The state has a key role in this process by inducing innovative behavior, strategies, and decisions. This study addresses Brazil's current policy for development of the health industry and its effects on qualification of national public laboratories by contextualizing different cycles of interaction between health policy and the industrial base, discussing the government's development strategy and the transfer and absorption of health technology (through Industrial Development Partnerships), and presenting two current partnerships involving public laboratories in the production of medicines and vaccines. Resumo: As inovações tecnológicas jogam papel decisivo no processo de desenvolvimento das sociedades, visto que contribuem para gerar crescimento econômico e bem-estar da população. O Estado possui grande importância e centralidade nesse processo, pois pode induzir fortemente o comportamento, as estratégias e as decisões relativas à inovação. O presente artigo tem por objetivo investigar a atual política de desenvolvimento produtivo em saúde no Brasil e seus reflexos sobre a capacitação dos laboratórios públicos nacionais. Para essa finalidade, contextualiza os diferentes ciclos de interação entre a política de saúde e a sua base produtiva, discute a estratégia do governo brasileiro para o desenvolvimento, a transferência e a absorção de tecnologia na área da saúde (as parcerias para o desenvolvimento produtivo) e apresenta duas parcerias vigentes envolvendo laboratórios públicos para a produção de medicamentos e vacinas.

  7. Para Candidatos en Programas de Centros de Cuidado y Educacion Infantil con Bebes y "Toddlers": Asociado en Desarrollo Infantil Sistema de Evaluacion y Normas de Competencia CDA (Infant/Toddler Caregivers in Center-Based Programs: The Child Development Associate Assessment System and Competency Standards).

    ERIC Educational Resources Information Center

    Council for Early Childhood Professional Recognition, Washington, DC.

    This Spanish-language booklet outlines the requirements of the Child Development Associate (CDA) credential for caregivers working in center-based infant and toddler day care programs. Part 1 provides an overview of the CDA credentialing system and the various options, settings, standards, and stages of the CDA assessment system. Part 2 explains…

  8. Para Candidatos en Programas de Centros de Cuidado y Educacion Infantil con Ninos de Edad Pre-escolar: Asociado en Desarrollo Infantil Sistema de Evaluacion y Normas de Competencia CDA (Preschool Caregivers in Center-Based Programs: The Child Development Associate Assessment System and Competency Standards).

    ERIC Educational Resources Information Center

    Council for Early Childhood Professional Recognition, Washington, DC.

    This Spanish-language booklet outlines the requirements of the Child Development Associate (CDA) credential for preschool teachers or caregivers who work in center-based preschool day care programs. Part 1 provides an overview of the CDA credentialing system and the various options, settings, standards, and stages of the CDA assessment system.…

  9. Comparing Teaching Styles and Personality Types of EFL Instructors in the Public and Private Sectors (Una comparación de los estilos de enseñanza y los tipos de personalidad de profesores de inglés de los sistemas educativos estatal y privado)

    ERIC Educational Resources Information Center

    Diaz Larenas, Claudio H.; Rodriguez Moran, Andrea Victoria; Poblete Rivera, Karen Jocelyn

    2011-01-01

    This is an exploratory non-experimental research study whose main objective is to compare the teaching styles of a group of thirty teachers of English working in either public or private secondary education in Chile. In order to collect the required data, two instruments were administered to the participants: a teaching style inventory and a…

  10. Self-Programmed Counseling and Self-Programmed Control Manual. A Guide to Self-Image Development with Emphasis on the Chicano Student. Student's Guide = Manual de Sistema de Consejo Auto Programado y Control Auto Programado. Una Guia Para el Desarrollo de La Imagen Propia Con un Enfasis en el Estudiante Chicano.

    ERIC Educational Resources Information Center

    Mireles, S. Raymond

    Self-Programmed Counseling, the instructor's guidance, and Self-Programmed Control (SPC), the student's response, was initially developed by Title III Project USTED (United Students and Teachers for Educational Development) for Mexican American college students on academic probation to use on a non-credit, special group counseling basis. As part…

  11. Europe/Latin America Report, Science and Technology, Italy: Development Prospects for Transport, Pharmaceuticals, Aerospace

    DTIC Science & Technology

    1987-04-02

    ATTERRAGGIO " 4 . A MICR00NDE • FIBRE OTTICHE 7.. ► SISTEMA INTERAMENTE DIGITALE DI COMANDO E CONTROLLO 8. • ATTERRAGGIO AUTOMATIK...Aircraft t PRESTAZIONI 1. ,.* •CONTROLU S 3 INTERAMENTE AEREINUOVAGENERAZ.ONE >1 ’ ELETTR0N,C1 y » SISTEMA 01

  12. [Characteristics of communication systems of suspected occupational disease in the Autonomous Communities, Spain].

    PubMed

    García Gómez, Montserrat; Urbaneja Arrúe, Félix; García López, Vega; Estaban Buedo, Valentín; Rodríguez Suárez, Valentín; Miralles Martínez-Portillo, Lourdes; González García, Isabel; Egea Garcia, Josefa; Corraliza Infanzon, Emma; Ramírez Salvador, Laura; Briz Blázquez, Santiago; Armengol Rosell, Ricard; Cisnal Gredilla, José María; Correa Rodríguez, Juan Francisco; Coto Fernández, Juan Carlos; Díaz Peral, Mª Rosario; Elvira Espinosa, Mercedes; Fernández Fernández, Iñigo; García-Ramos Alonso, Eduardo; Martínez Arguisuelas, Nieves; Rivas Pérez, Ana Isabel

    2017-03-17

    En algunas comunidades autónomas existen diversas iniciativas de sistemas para la comunicación de las sospechas de enfermedades profesionales (EP). El objetivo de este trabajo fue describir su grado de desarrollo y características de los sistemas puestos en marcha desde las administraciones sanitarias a nivel autonómico.

  13. Long-Baseline Comparisons of the Brazilian National Time Scale to UTC (NIST) Using Near Real-Time and Postprocessed Solutions

    DTIC Science & Technology

    2007-11-01

    long baseline of ~8600 km. The comparisons were made with measurement systems developed for the Sistema Interamericano de Metrologia (SIM) comparison...measurements are compared and summarized. I. INTRODUCTION The Sistema Interamericano de Metrologia (SIM) is a regional metrology organization...Interamericano de Metrologia (SIM) comparison network, a network designed to intercompare the national standards of time and frequency in North, Central

  14. The Chilean Army, Its History, Organization, Regional Environment and Challenges Over the Next 25 Years

    DTIC Science & Technology

    2002-04-09

    Training System (Sistema de Entrenamiento Thctico Computacional -SETAC) 52 employed at the War College is set, designed by military polytechnic engineers...www.army.mil/usawc/Parameters/01 spring/addicott.htm Tactical Computer Training System web page (Sistema de Entrenamiento Thctico Computacional -SETAC) http

  15. Groundwater-flow modeling in the Yucatan karstic aquifer, Mexico

    NASA Astrophysics Data System (ADS)

    González-Herrera, Roger; Sánchez-y-Pinto, Ismael; Gamboa-Vargas, José

    2002-09-01

    aquifère. La zone karstifiée a été modélisée en posant l'hypothèse qu'il fonctionne hydrauliquement comme un milieu poreux granulaire. Au cours de la calibration, les hypothèses suivantes ont été testées: (1) les phénomènes karstiques jouent un rôle important dans le système aquifère, (2) un anneau ou une ceinture de dépressions dans la région est la manifestation d'une zone à forte transmissivité qui permet l'écoulement en conduits de l'eau souterraine en direction du Golfe du Mexique, et (3) la situation géologique dans la partie sud du Yucatan détermine les écoulements souterrains. Le modèle montre que la faille de la Sierrita de Ticul, dans la partie sud-ouest de la région étudiée, joue le rôle de barrière et que les valeurs de la piézométrie décroissent en direction du nord-est. La modélisation montre également que la dynamique du système aquifère à l'échelle régionale n'a pas été modifiée malgré le grand nombre de puits de pompage, parce que le volume pompé est faible en comparaison du volume de recharge; en outre, le réseau karstique très bien développé dans cette région possède une très forte conductivité hydraulique. Resumen. El modelo conceptual actual del acuífero cárstico no confinado de la Península de Yucatán (México) es el de un lentejón de agua dulce flotando sobre agua salada, más densa, la cual penetra más de 40 kilómetros tierra adentro. Debido a la alta conductividad hidráulica del acuífero, existe un gradiente hidráulico muy bajo cuyo rango está entre 7 y 10 milímetros por kilómetro en la porción norte de la península. Se utilizó el código AQUIFER para investigar el sistema de flujo de las aguas subterráneas a escala regional en el acuífero. La zona carstificada se modeló suponiendo que actúa hidráulicamente como un medio poroso granular. Como parte de la calibración, se probaron las siguientes hipótesis: (1) las características cársticas desempeñan un papel importante

  16. Cardiopulmonary Exercise Test: Background, Applicability and Interpretation.

    PubMed

    Herdy, Artur Haddad; Ritt, Luiz Eduardo Fonteles; Stein, Ricardo; Araújo, Claudio Gil Soares de; Milani, Mauricio; Meneghelo, Romeu Sérgio; Ferraz, Almir Sérgio; Hossri, Carlos; Almeida, Antonio Eduardo Monteiro de; Fernandes-Silva, Miguel Morita; Serra, Salvador Manoel

    2016-11-01

    surgimento de sintomas e/ou sinais limitantes. Neste exame se mensura a ventilação (VE), o consumo de oxigênio (VO2), a produção de gás carbônico (VCO2) e as demais variáveis de um teste de exercício convencional. Adicionalmente, podem ser verificadas, em situações específicas, a oximetria de pulso e as alças fluxo-volume antes, durante e após o esforço. A análise integrada dos dados permite a completa avaliação dos sistemas cardiovascular, respiratório, muscular e metabólico no esforço, sendo considerado padrão-ouro na avaliação funcional cardiorrespiratória.1-6 O TCPE permite definir mecanismos relacionados à baixa capacidade funcional, os quais podem ser causadores de sintomas como a dispneia, correlacionando-os com alterações dos sistemas cardiovascular, pulmonar e musculoesquelético. Também pode ser de grande aplicabilidade na avaliação prognóstica em cardiopatas, pneumopatas e em pré-operatório, além de auxiliar na prescrição mais criteriosa do exercício em sujeitos normais, em atletas, em cardiopatas e em pneumopatas. Assim como ocorre com o uso clínico, a pesquisa nesse campo também cresce e várias contribuições científicas de pesquisadores nacionais são publicadas em periódicos de alto fator de impacto. Sendo assim, o objetivo deste documento é fornecer uma revisão ampla da aplicabilidade do TCPE nas diferentes situações clínicas, bem como servir como guia prático na interpretação desse teste propedêutico.

  17. Civil-Military Relations During Coalition Operations in the Balkans

    DTIC Science & Technology

    2001-05-01

    no. 4 (October 1997), 94; and General Jean Cot, French Army, “Dayton ou la Porte Etroite: Genese et Avenir d’un Desastre ,” in Derniere Guerre...Defense Nationale 53, no. 4 (October 1997), 94; and General Jean Cot, French Army, “Dayton ou la Porte Etroite: Genese et Avenir d’un Desastre ,” in

  18. Personal Computers for Distance Education. The Study of an Educational Innovation.

    ERIC Educational Resources Information Center

    Jones, Ann; And Others

    This book examines the effects of a 1988 policy decision of the British Open University (OU) requiring all distance learners to acquire a personal computer (PC) on their own and use it to conduct their distance education as OU students. The following topics are discussed in the book's nine chapters: potential, history, and development of computers…

  19. Evaluation of an Access Route to Higher Education through a Work-Based Assessment Strategy

    ERIC Educational Resources Information Center

    Harvey, Morag; Slaughter, Tim

    2007-01-01

    The Open University (OU) is the UK's largest university, with over 200,000 people studying, part time and at a distance, a range of undergraduate and postgraduate courses and packs. Research and development carried out at the OU's Centre for Outcomes-Based Education (COBE), has provided a new way of enabling students to be accredited at higher…

  20. Superfund Record of Decision (EPA Region 5): North Bronson Industrial Area, Operable Unit 1, city of Bronson, Branch County, MI, June 19, 1998

    SciTech Connect

    1998-09-01

    This document presents the selected remedial action for the North Bronson Industrial Area Superfund site, Operable Unit 1 (OU 1). OU 1 is an interim action that addresses the eastern and western sludge lagoons, groundwater impacted by the sludge lagoons, exposure to area-wide groundwater contamination, and County Drain No. 30 (CD No. 30).

  1. Radiations cosmiques : danger dans l'Espace

    NASA Astrophysics Data System (ADS)

    Bonnet-Bidaud, J. M.; Dzitko, H.

    2000-06-01

    Au sol, l'atmosphere nous protege plus ou moins bien. Mais dans l'espace ou a bord des avions de ligne, l'homme est directement expose aux rayonnements cosmiques qui peuvent etre mortels. Un veritable frein a la presence humaine prolongee dans l'espace. Une menace que les agences spatiales prennent tres au serieux.

  2. Institutional Change for Improving Accessibility in the Design and Delivery of Distance Learning--The Role of Faculty Accessibility Specialists at the Open University

    ERIC Educational Resources Information Center

    Slater, Rachel; Pearson, Victoria K.; Warren, James P.; Forbes, Tina

    2015-01-01

    The Open University (OU) has an established infrastructure for supporting disabled students. Historically, the thrust of this has focused on providing accessible adjustments post-production. In 2012, the OU implemented securing greater accessibility (SeGA) to raise awareness and bring about an institutional change to curriculum design so that the…

  3. 77 FR 12616 - Notice of Lodging of Consent Decree Under the Comprehensive Environmental Response, Compensation...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-03-01

    ... 1 Superfund Site in South El Monte, Los Angeles County, California (the ``South El Monte O.U... to the South El Monte O.U. will pay a total of $1.7 million plus interest. The PRPs are Linderman... pay. In exchange for the ability to pay payments, the plaintiffs covenant not to sue the ability...

  4. Using Interactive Videodiscs in Open University Courses. I.E.T. Papers on Broadcasting No. 218.

    ERIC Educational Resources Information Center

    Fuller, Robert G., Ed.

    This nine-paper collection from a June 1983 Open University (OU) campus workshop in Milton Keynes, England, describes an interactive video project developed for an OU undergraduate course, T252, Introduction to Engineering Materials, and discusses varied aspects of interactive videodisc program development. The following papers are included:…

  5. Is Developing Employability Skills Relevant to Adult Language Students?

    ERIC Educational Resources Information Center

    Beaven, Tita

    2016-01-01

    Open University (OU) students are typically mature students who combine studying part-time with work or caring responsibilities; the average age of OU language students has been dropping, and about 30% of our new students are now under 25. The traditional view of adult learners who study languages is that they often study for pleasure or personal…

  6. Experiences with New Approach to Use of Information Technologies in Education

    ERIC Educational Resources Information Center

    Kostolányová, Katerina

    2008-01-01

    Paper describes approach of Department of Information and Communication technologies (KIK) on Pedagogical Faculty of University of Ostrava in Ostrava (PedF OU) to development of information knowledge and skills of students of OU with the aid of modern methods and education technologies with support of information technologies (IT). It surveys the…

  7. L'appendagite épiploïque primitive: une cause rare de douleur abdominal

    PubMed Central

    Yazough, Issam; El bouhadouti, Hecham; Mazaz, Khalid

    2015-01-01

    Les appendagites sont une cause rare de douleur abdominale chez l'adulte, elles simulent souvent le tableau d'une appendicite aiguë ou une sigmoïdite, le diagnostic est souvent poser par une TDM ou lors d'un acte chirurgicale, le traitement est essentiellement médicale. PMID:26113913

  8. The Suitability of Non-Traditional Distance Learning Systems for Different Types of Students: The Experience of the Open University of the United Kingdom. AIR Forum 1980 Paper.

    ERIC Educational Resources Information Center

    McIntosh, Naomi E.; Woodley, Alan

    The progress of students under 21 years old at the United Kingdom's Open University (OU) was compared with a sample of mature students, using sociological and psychometric research methods. The research goal was to consider whether the OU's teaching system originally designed for adults is suited to the needs and circumstances of students in the…

  9. Enhancements to Boundary Element Cathodic Protection Simulation Software

    DTIC Science & Technology

    2002-02-01

    navire. Nous avons effectue des modifications pour tenir compte de plusieurs courbes de polarisation et de regions ou Ia peinture est endommagee. En...mailles et le contr6le des anodes), ainsi que de nouvelles commandes permettant de decrire les courbes de polarisation et les regions ou la peinture

  10. 75 FR 34405 - National Oil and Hazardous Substances Pollution Contingency Plan; National Priorities List...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-06-17

    ... have entered the sewer system ] through cracks or loose connections (1992). OU 15: Asbestos IRA--Continuation of the Army's survey and removal of friable asbestos from on-post structures (1996). OU 16: M-1...-deposited contamination in surface soils immediately north of the On-Post boundary in the southeast...

  11. Hydrodynamic model of cells for designing systems of urban groundwater drainage

    NASA Astrophysics Data System (ADS)

    Zimmermann, Eric; Riccardi, Gerardo

    2000-08-01

    An improved mathematical hydrodynamic quasi-two-dimensional model of cells, CELSUB3, is presented for simulating drainage systems that consist of pumping well fields or subsurface drains. The CELSUB3 model is composed of an assemblage of algorithms that have been developed and tested previously and that simulate saturated flow in porous media, closed conduit flow, and flow through pumping stations. A new type of link between aquifer cells and drainage conduits is proposed. This link is verified in simple problems with well known analytical solutions. The correlation between results from analytical and mathematical solutions was considered satisfactory in all cases. To simulate more complex situations, the new proposed version, CELSUB3, was applied in a project designed to control the water-table level within a sewer system in Chañar Ladeado Town, Santa Fe Province, Argentina. Alternative drainage designs, which were evaluated under conditions of dynamic recharge caused by rainfall in a critical year (wettest year for the period of record) and a typical year, are briefly described. After analyzing ten alternative designs, the best technical-economic solution is a subsurface drainage system of closed conduits with pumping stations and evacuation channels. Résumé. Un modèle hydrodynamique perfectionné de cellules en quasi 2D, CELSUB3, est présenté dans le but de simuler des systèmes de drainage qui consistent en des champs de puits de pompage ou de drains souterrains. Le modèle CELSUB3 est composé d'un assemblage d'algorithmes développés et testés précédemment et qui simulent des écoulements en milieu poreux saturé, en conduites et dans des stations de pompage. Un nouveau type de lien entre des cellules d'aquifères et des drains est proposé. Ce lien est vérifié dans des problèmes simples dont les solutions analytiques sont bien connues. La corrélation entre les résultats des solutions analytiques et des solutions mathématiques a été consid

  12. Analysis of the maximum discharge of karst springs

    NASA Astrophysics Data System (ADS)

    Bonacci, Ognjen

    2001-07-01

    ) la dimension limitée du conduit karstique, (2) l'écoulement en charge, (3) le débordement dans un autre bassin, (4) le débordement du réseau s'écoulant vers la source principale par des sources temporaires dans le même bassin, (5) le stockage d'eau dans la zone surmontant l'aquifère karstique ou la zone épikarstique du bassin, et (6) des facteurs tels que le climat, le sol et le couvert végétal, l'altitude et la géologie du bassin d'alimentation. Le phénomène de capacité limitée du débit maximal des sources karstiques n'est pas pris en compte dans la modélisation des processus de précipitation-ruissellement, ce qui est probablement une des principales raisons de l'actuelle médiocre qualité de la modélisation hydrologique du karst. Resumen. Se presenta un análisis de las condiciones que limitan la descarga de algunos manantiales kársticos. Un elevado número de los manantiales estudiados muestra que, bajo condiciones de precipitación extremadamente intensa, hay un valor máximo para la descarga de los manantiales principales de la cuenca, independientemente del tamaño de ésta y del volumen de precipitación. La modelación de la descarga de manantiales kársticos no es fácil de generalizar y esquematizar debido a la existencia de numerosas características que son inherentes a los sistemas kársticos de flujo. A partir del estudio detallado de los datos publicados sobre cuatro manantiales kársticos, se identificó las posibles causas de la existencia de un caudal máximo de descarga: (1) el tamaño limitado del conducto kárstico, (2) el caudal surgente, (3) la descarga a otras cuencas, (4) el desbordamiento del sistema de flujo principal hacia manantiales intermitentes dentro de la misma cuenca, (5) el almacenamiento de agua en la zona superior del acuífero kárstico o zona epikárstica de la cuenca, y (6) factores tales como el clima, suelo y cubierta vegetal, y la altitud y geología de la zona de captación. La limitación de la

  13. Análise de Estruturas Morfológicas da Cauda de Plasma do Cometa P/Halley

    NASA Astrophysics Data System (ADS)

    Voelzke, M. R.; Matsuura, O. T.

    1997-08-01

    permitiram determinar o instante de suas origens, ou seja, o instante em que supostamente a de sconexão teve lugar no núcleo. Assim, foram identificados 19 D.E.'s distintos. Aparentemente o plasma desconectado de um dado D.E. afasta-se com velocidade constante do núcleo cometário. Tal velocidade, contudo, varia enormemente de um D.E. para outro. Nove D.E.'s pré-periélicos apresentaram velocidade média Vc, corrigida dos efeitos de projeção, igual a (260 +- 87) km/s e dez pós-periélicos (130 +- 37) km/s. Esta assimetria de Vc em relação ao periélio pode ser devida ao modo assimétrico com que a componente radial da velocidade orbital do cometa se combina com a velocidade do vento solar no sistema de referência cometocêntrico. Os D.E.'s foram correlacionados com variações simultâneas de brilho, formação de jatos e outros fenômenos associados. Sua ocorrência é discutida no contexto dos modelos de reconexão magnética e de compressão dinâmica por vento solar exacerbado. - Brandt, J.C., Niedner, M.B.Jr. and Rahe, J., The International Halley Watch Atlas of Large-Scale Phenomena (printed by: Johnson Printing Co, Boulder, CO), University of Colorado-Boulder, 1992. - Celnik, W.E., Koczet, P., Schlosser, W., Schulz, R., Svejda, P. and Weissbauer, K., Astron. Astrophys. Suppl. Ser. 72, 89, 1988. - Delva, M., Schwingenschuh, K., Niedner, M.B.Jr. and Gringauz, K.I., Planet. Space Sci. 39, Number 5, 697, 1991. - Hyder, C.L., Brandt, J.C. and Roosen, R.G., Icarus 23, 601, 1974. - Jockers, K., Astron. Astrophys. Suppl. Ser. 62, 791, 1985. - Matsuura, O.T. and Voelzke, M.R., Rev. Mexicana Astron. Astrof. 21, 609, 1990. - Niedner, M.B.Jr. and Brandt, J.C., Astrophys. J. 234, 723, 1979. - Niedner, M.B.Jr. and Brandt, J.C., Icarus 42, 257, 1980. - Tomita, K., Saito, T. and Minami, S., Astron. Astrophys. 187, 215, 1987. - Voelzke, M.R., Publications of the Astronomical Society of the Pacific 108, Number 729, 1063, 1996.

  14. [Evaluation of two closed-system drug transfer device in the antineoplastic drug elaboration process].

    PubMed

    Gómez-Álvarez, Sandra; Porta-Oltra, Begoña; Hernandez-Griso, Marta; Pérez-Labaña, Francisca; Climente-Martí, Mónica

    2016-01-01

    Objetivo: evaluar el impacto del uso de dos sistemas cerrados sobre el proceso de preparación de quimioterapia parenteral, con respecto al sistema estándar, en términos de contaminación local y ambiental, y tiempos de preparación. Método: estudio observacional prospectivo. Se compararon dos proveedores distintos de sistemas cerrados, Icu Medical® y Care Fusion®, frente al sistema estándar de preparación de quimioterapia parenteral. Quince enfermeros del Servicio de Farmacia elaboraron cada uno de ellos 5 preparaciones, una siguiendo el procedimiento estándar y cuatro usando los sistemas cerrados. Para evaluar la aparición de contaminación se elaboró una solución de fluoresceína al 0,5%. Se evaluaron dos tipos de contaminación: local (en tres puntos: sistema acoplado a vial, jeringa y envase final) y ambiental (guantes y mesa de trabajo), obteniéndose el porcentaje de preparaciones contaminadas en cada uno de ellos. Se registró el tiempo empleado por cada enfermero en cada una de las preparaciones. Resultados: se elaboraron 75 preparaciones. Se produjo una reducción global de la contaminación local para los SC Icu Medical® y Care Fusion® del 24% y 74%, respectivamente. En el sistema cerrado Care Fusion® la contaminación local fue significativamente menor que en el sistema estándar en vial, jeringa y envase final; mientras que en el sistema cerrado Icu Medical® solo fue significativamente menor en la conexión al vial. Se produjo un incremento significativo del tiempo de preparación con la utilización de sistemas cerrados de los entre 23,4 y 30,5 segundos. Conclusiones: ambos sistemas cerrados han mostrado un beneficio con respecto a la utilización del sistema estándar. Sin embargo, se han visto incrementados significativamente los tiempos de preparación con ambos sistemas.

  15. Comparative study of preparation of hazardous drugs with different closed-system drug transfer devices by means of simulation with fluorescein.

    PubMed

    González-Haba Peña, Eva; Manrique Rodríguez, Silvia; Herranz Alonso, Ana Mª; Pérez Castán, Patricia; Moreno Gálvez, Mónica; Iglesias Peinado, Irene; Sanjurjo Saez, María

    2016-11-01

    Objetivo: Comparar la contaminación generada durante la elaboración y administración de fármacos peligrosos con diferentes componentes de sistemas cerrados y de manera secundaria, seleccionar el sistema más eficiente. Material y métodos: Estudio comparativo de elaboración de mezclas de fluoresceína con diferentes combinaciones de sistemas cerrados de tipo valvular. Se consideró contaminación ambiental la detectada en los puntos críticos de conexión y las salpicaduras generadas en cualquier otro punto distinto. La variable principal fue la detección cualitativa mediante luz ultravioleta de contaminación por salpicaduras al comparar las modalidades con y sin conector. Se calculó un tamaño muestral de 160 preparaciones por modalidad, para detectar diferencias de al menos un 5%. Resultados: Se produjeron salpicaduras en 7 preparaciones, todas sin conector (p = 0,015). No se encontraron diferencias entre utilizar punzón de apoyo o de anclaje (p = 0,445), ni entre el sistema ChemoCLAVE® vs sistema valvular con sueros Fleboflex®. En todas las preparaciones se produjo contaminación en algún punto crítico. La utilización de punzones de apoyo, conectores y sueros luer se ha identificado como la modalidad más eficiente. Conclusiones: Es importante utilizar el conector de jeringa para que el sistema sea completamente cerrado. El uso de punzones de anclaje no parece presentar ventajas frente a los de apoyo y la combinación con los sueros Fleboflex® presenta una seguridad similar al sistema ChemoCLAVE®. Sin embargo, las conexiones de estos sistemas no son secas y, por tanto, es importante continuar con estudios de contaminación que comparen diferentes sistemas.

  16. Extraterrestrial hydrogeology

    NASA Astrophysics Data System (ADS)

    Baker, Victor R.; Dohm, James M.; Fairén, Alberto G.; Ferré, Ty P. A.; Ferris, Justin C.; Miyamoto, Hideaki; Schulze-Makuch, Dirk

    2005-03-01

    subsurface apparaissent à travers toute leur histoire planétaire. La Terre est particulièrement clémente avec la recharge des réservoirs, avec de amples précipitations, des conditions glaciaires et de fortes chaleurs, comme l'atteste les enregistrements géologiques et paléontologiques. D'un autre côté, Mars se trouve dans une phase essentiellement glaciaire, qui est interrompue par des activités contraintes par les phénomènes endogéniques. Cette activité conduit de manière catastrophique à des cycles hydrologiques et à des perturbations climatiques brutaux. Les aquifères régionaux dans les haute terres martiennes qui se sont formés dans des conditions similaires aux conditions terrestres, alimentent les plaines du Nord. L'eau a également été déplacée vers le Pôle Sud martien durant des changements marqués par une forte activité endogénique et une modification des paramètres de l'orbite de Mars. Venus possèdait vrais emblablement une hydrosphère chaude durant des millions d'année, avant le développement de son atmosphère et sa surface particulièrement chaude. Par après Venus a perdit son hydrosphère alors que la luminosité solaire augmentait et qu'une humidité liée à un effet de serre s'installait. Les océans de subsurface d'eau ou d'eau ammoniacale, induits par les forces de marée et le chauffage radiogénique, apparaissent probablement sur les satellites les plus importants (Europa, Ganymede, Callisto, Titan, Triton). Les forces de marée entre les petits corps externes du système solaire peuvent également occasionner la fusion de glace et la stabilité des océans internes d'eau liquide. Los procesos hídricos subsuperficiales son comunes en cuerpos planetarios del sistema solar y son altamente probables para exoplanetas (planetas fuera del sistema solar). Para muchos cuerpos del sistema solar, el agua subsuperficial existe como hielo. Para la Tierra y Marte han ocurrido zonas saturadas subsuperficiales a través de sus

  17. Superfund record of decision (EPA Region 2): Syosset Landfill Site, operable unit 2, Town of Oyster Bay, Nassau County, NY, March 28, 1996

    SciTech Connect

    1996-11-01

    This decision document presents the selected remedy for the second operable unit (OU2) for the Syosset Landfill site (the Site), located in the Town of Oyster Bay, Nassau County, New York. This operable unit addresses the fate and transport of the contaminants in the groundwater emanating from the Site. EPA is consultation with the State of New York has determined that contamination is limited and does not pose a significant threat to human health or the environment; therefore, remediation is not appropriate. This determination is based on the OU2 Remedial Investigation and the expected successful implementation of the OU1 remedy.

  18. Recent Advances in Augmented Reality

    DTIC Science & Technology

    2001-12-01

    forms images directly on the retina. These dis- plays, which MicroVision is developing commercially, literally draw on the retina with low-power lasers...the Phillips Tower, as seen from two different viewpoints. C ou rt es y H RL L ab or at or ie s 8 RV-Border Guards, an AR game. C ou rt es y M R Sy...filtered view (bottom), from Julier et al.55 C ou rt es y N av al R es ea rc h La b 14 Virtual and real occlusions. The brown cow and tree are

  19. Simulation-Based Acquisition of the Future Air-Land Combat System (acquisition par la simulation des systemes futurs de combat aeroterresire)

    DTIC Science & Technology

    2003-11-01

    technologiques récentes, comme les robots ou les capteurs miniaturisés. Afin d’explorer les différents concepts et d’engager les phases de conception des...situation opérationnelle, en recoupant des informations provenant de capteurs terrestres (radars), aériens (avions, drones) ou spatiaux (satellites...détectée. Le principe essentiel est basé sur une mise en réseau des capteurs de tout type (exemples : imagerie visible ou infrarouge, radars) et des

  20. Durability Evaluation of the Effects of Hydro-processed Renewable Jet (HRJ) Blended at 50% with Petroleum JP-8 on a Navistar Maxxforce D10 9.3L Engine

    DTIC Science & Technology

    2012-05-01

    nif old C oo lan t En gin e I n Co ola nt En gin e Ou t...100 hour JP-8 Performance Run, Standard and DOC Data Summary UNCLASSIFIED A3 - 3 JP -8 10 0 H RS Ai r L FE Int ak e Ma nif old C AC De...CA C I nle t C AC ou tle t Int ak e Ma nif old C oo lan t En gin e I n Co ola nt En gin e Ou t Oi l S um p Te mp Fu el Be ak er Fu el

  1. Combat Identification Decision Making: Effect of a Secondary Task

    DTIC Science & Technology

    2010-10-01

    compensatoires et heuristiques sont fondées sur des systèmes de calcul distincts. Les sujets ont appris à classer des photos de soldats en tant qu’amis ou...sujets ont appris à classer des photos de soldats en tant qu’amis ou ennemis par apprentissage par essai et par erreur et ont alors subi une séance de...compensatoires et heuristiques sont fondées sur des systèmes de calcul distincts. Les sujets ont appris à classer des photos de soldats en tant qu’amis ou

  2. Source Hierarchy List. Volume 3. O through Z

    DTIC Science & Technology

    1994-07-01

    PHOTOGRAMMETRY 02 TECHNISCHE UNIV GRAZ (AUSTRIA) DEPT OF PHOTOGRAPHY* 01 TECHNISCHE UNIV GRAZ (AUSTRIA) INST FUER DIGITALE BILBERARBEITUNG IN...UNIVERSIDAD NACIONAL AUTCHOMA DE MEXICO MEXICO CITY CEWTRO DE IHVESTIGACION EN MATEMATICAS APLICADAS/ SISTEMAS * Of UNIVERSIDAD NACIONAL AUTONOMA DE MEXICO

  3. NASA Astrophysics Data System (ADS)

    Brunini, A.

    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 como 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 problema, 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.

  4. Male Reproductive System (For Teens)

    MedlinePlus

    ... español Sistema reproductor masculino All living things reproduce. Reproduction — the process by which organisms make more organisms ... male and female reproductive systems are essential for reproduction. Humans, like other organisms, pass certain characteristics of ...

  5. Integrated disease management: a critical review of foreign and Portuguese experience.

    PubMed

    Coelho, Anabela; Leone, Cláudia; Ribeiro, Vanessa; Sá Moreira, Pedro; Dussault, Gilles

    2014-01-01

    Introdução: O artigo faz uma revisão de literatura sobre os programas de gestão integrada da doença, apresentando resultados sobre o nível de integração dos cuidados, as intervenções prioritárias utilizadas nos programas e o seu efeito, nomeadamente, nos doentes.Material e Métodos: A revisão de literatura identificou 1 251 artigos, publicados entre 2006 e 2011. Depois de uma criteriosa seleção identificaram-se para a análise bibliométrica e discussão crítica, 61 artigos.Resultados: Realçamos o facto de serem os Estados Unidos da América o país que mais publica sobre esta matéria; A doença mais reportada é a diabetes mellitus e o domínio de intervenção da gestão integrada da doença, predominante, é o ‘apoio ao auto-cuidado’. A maioria dos estudos foram implementados por managed care organizations, médicos de medicina geral e familiar organizados para o efeito ou hospitais. Das 360 intervenções reportadas, as mais utilizadas são as dirigidas aos doentes e aos profissionais. Os resultados mais observados nos doentes, aquando da monitorização dos programas, são: resposta clínica, utilização de serviços e estado de saúde.Discussão: Cada país tem a sua própria forma de implementar a estratégia de gestão integrada da doença. O foco de atenção da prática clínica é o empoderamento dos doentes, particularmente através da promoção da auto-gestão. Os resultados clínicos e os de utilização dos serviços para além de serem os mais utilizados, são também, aqueles com maior impacto nos programas de gestão integrada da doença.Conclusão: O sistema de saúde Português ainda enfrenta sérios desafios no tocante à coordenação e integração de cuidados dirigidos à pessoa com doença crónica pelo que se sugere a atualização do programa.

  6. [Biomarkers of cervical carcinogenesis associated with genital human papillomavirus infection].

    PubMed

    Oliveira, Ana; Delgado, Candida; Verdasca, Nuno; Pista, Angela

    2013-01-01

    Introdução/Objetivos: A infeção persistente pelo Vírus do Papiloma Humano de alto risco (HPVar) é considerada como a causa necessária, embora não suficiente, para o desenvolvimento do cancro do colo do útero, sugerindo que outros fatores estarão envolvidos no processo de carcinogénese. Este estudo pretendeu avaliar indicadores de prognóstico da persistência da infeção por HPV, nomeadamente o estado físico e a carga viral dos HPV 16 e 18 e a superexpressão dos transcritos do RNAm dos HPV 16, 18, 31, 33 e 45, num grupo de mulheres com ou sem sintomatologia clínica e citopatológica. Material e Métodos: Foram estudadas 378 alíquotas de células epiteliais congeladas pertencentes a utentes dos centros de saúde do Serviço Nacional de Saúde e de clínicas privadas, referenciadas para teste HPV, entre Janeiro de 2007 e Dezembro de 2010. De acordo com o diagnóstico citopatológico, foram definidos cinco grupos: normal, ASCUS, LSIL, HSIL e carcinoma invasivo do colo do útero. Para a determinação do estado físico do DNA e da carga viral dos HPV 16 e 18 foi utilizada metodologia de PCR em tempo real, e para a superexpressão dos transcritos dos oncogenes E6 e E7 o sistema comercial NucliSENS EasyQ HPV®. Os indicadores foram analisados em associação com os tipos de lesão do colo do útero. Para a análise estatística foi utilizado o o programa informático SPSS versão 16.0 e o teste de Chi-Quadrado. Resultados: Os resultados mostraram ausência de associação estatisticamente significativa entre a gravidade da lesão e o estado físico do DNA dos HPV 16 e 18. A superexpressão dos transcritos do RNAm E6/E7 e a carga viral dos HPV 16 e 18 aumentaram significativamente em função do grau da lesão. Conclusões: Os resultados obtidos sugerem que a determinação do estado físico do DNA dos HPV 16 e 18, isoladamente, não constitui um indicador de prognóstico para o desenvolvimento e progressão das lesões. A superexpressão dos transcritos

  7. Birds and people in semiarid northeastern Brazil: symbolic and medicinal relationships

    PubMed Central

    2013-01-01

    representantes. Sete espécies foram indicadas apenas na categoria medicinal, cinco espécies apenas relacionadas a aspectos simbólicos e quatro foram indicadas como relacionadas a ambas as categorias (medicinal e simbólica). Conclusão Os conhecimentos, crenças e práticas relacionadas à avifauna no semiárido brasileiro, seja no aspecto simbólico ou medicinal, demonstra a importância cultural que esse grupo de vertebrados representa para as populações locais, revelando um sistema de crenças que está intrinsicamente relacionado às práticas cinegéticas na região. PMID:23295130

  8. INRiM Time and Frequency Laboratory: A New Data Management System (DMS)

    DTIC Science & Technology

    2010-11-01

    protocols defined at international level. The INRIM TFL, at present, is equipped with a set of measuring and control devices (SAD – Sistema di...Proceedings of the 22 th European Frequency and Time Forum (EFTF), 22-25 April 2008, Toulouse, France. [2] G. Vizio, 2000, “ Sistema per l’acquisizione...dei dati del Laboratorio di Tempo e Frequenza,” Manuale Operativo INRIM – 2000. [3] R. Costa, D. Orgiazzi, G. C. Cerretto, and V. Pettiti, 2010

  9. AGARD Index of Publications, 1989-1991 (Index des Publications 1989-1991)

    DTIC Science & Technology

    1992-07-01

    26150 18-08) May N92-12458# Sener Ingenieria y Sistemas S.A., Madrid (Spain). 1991 A METHODOLOGY FOR SOFTWARE SPECIFICATION AND (AGARD-AG-317...RICARDO MINGUEZ, andAGARND/ Scientionl ruestions Executive PEDRO SEGUROLA (Sener Ingenieria y Sistemas S.A., Madrid, Complex control systems like those used...Mulisaffcnrliaameter Observations with a network Inshrchaigwl biu Fwn MREEC MUf of digitall lonoeondaa p 251 Ne- 36p256 NP9148521IPITERFREMCENIM113IT

  10. 25 Jahre - Institut fuer Geodaesie, Teil 2: Forschungsarbeiten und Veroeffentlichungen (25 Years - Institute of Geodesy, Part 2: Research Areas and Publications)

    DTIC Science & Technology

    2000-01-01

    Festpunktfeld Ruanda - 1992 - SIRGAS ( Sistema de refer6ncia geocdntrico para Amdrica del Sur) - 1995 - Festpunktfeld Per6 - 1996 Die DOENAV-Kampagne...Forschungsschwerpunkte Mit dem Sistema di Referdncia Geoc6ntrico para a Amd~rica do Sul (SIRGAS) wurde 1995 in einer Gerneinschaftsaktion aller... digitaler Form gespei- chert werden. Aus demn dabei anfallenden redundanten Datensatz erhalt man im Wege einer Ausgleichung den H6henunterschied

  11. Remediation System Evaluation, Comm. Bay/South Tacoma Channel, Well 12A Superfund Site

    EPA Pesticide Factsheets

    The first operable unit (OU1) of the Commencement Bay/South Tacoma Channel Superfund Site addressessoil and groundwater contamination associated with the Time Oil property that was first discovered inpublic supply Well 12A in 1981.

  12. Optimization Review: Lockwood Operable Unit 1 - Beall Source Area, Billings, Montana

    EPA Pesticide Factsheets

    The Lockwood Solvent Groundwater Plume Site (LSGPS) consists of two operable units (OUs) and is located on the outskirts of Billings, Montana in EPA Region 8. OU1 consists of contaminated soils and a chlorinated solvent groundwater plume associated with...

  13. A Squashed Heliosphere

    NASA Video Gallery

    Heliophysics' finding of the 'squashed' heliosphere when Voyager 1 and 2 crossed the bubble of solar wind at different distances from the sun. This led to a change in the way we see the shape of ou...

  14. Long-Term Monitoring Network Optimization Evaluation for Operable Unit 2, Bunker Hill Mining and Metallurgical Complex Superfund Site, Idaho

    EPA Pesticide Factsheets

    This report presents a description and evaluation of the ground water and surface water monitoring program associated with the Bunker Hill Mining and Metallurgical Complex Superfund Site (Bunker Hill) Operable Unit (OU) 2.

  15. Simulation of Merger of Two Black Holes and Gravitational Radiation

    NASA Video Gallery

    This movie shows a simulation of the merger of two black holes and the resulting emission of gravitational radiation. The colored fields represent a component of the curvature of space-time. The ou...

  16. 75 FR 62422 - Notice of Proposed Consent Decree Under the Comprehensive Environmental Response, Compensation...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-10-08

    ... ``Operable Unit 2'' (``OU2''), a category of remedial action addressing sources of groundwater contamination... ``Operable Unit 3,'' a category of remedial action addressing wetland contamination at the Site. In...

  17. Characterization of a Differentially Translated Protein, OMP85, from Two Campylobacter jejuni Isolates with Different Colonization Potentials in Broiler Chickens

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Campylobacter spp., considered a leading bacterial etiology of acute gastroenteritis in humans, is commonly associated with poultry. However, the factors involved in colonization of poultry with Campylobacter spp. remain unclear. Determination of colonization-associated factors should facilitate ou...

  18. Robotic Landers: Small With Big Benefits

    NASA Video Gallery

    NASA and the Johns Hopkins University Applied Physics Laboratory are creating a new generation of smart, versatile robotic landers. for exploring the moon, asteroids, and other airless bodies in ou...

  19. Proceedings of the Conference of the International Group for the Psychology of Mathematics Education (PME) (15th, Assisi, Italy, June 29-July 4, 1991), Volume 3.

    ERIC Educational Resources Information Center

    Furinghetti, Fulvia, Ed.

    Research reports from the annual conference of the International Group for the Psychology of Mathematics Education include: "La construcion algorithmique: niveaux ou stades?" (Mesquita); "For Establishing the Generality of Conjectures" (Miyazaki); "Teachers' Attitudes Towards Mathematics and Mathematics Teaching:…

  20. IMPROVING WATERBORNE DISEASE SURVEILLANCE

    EPA Science Inventory

    Public health surveillance has played a key role in controlling the spread of communicable disease and identifying the need for specific publich health practices, such as the filteration and chlorination of drinking water supplies. However, the characteristics of waterborne ou...

  1. What You Should Know about Hormone Therapy Health Risks and Benefits

    MedlinePlus

    ... HAT Y OU S HOULD K NOW A BOUT Hormone Therapy Health Risks and Benefits V aginal dryness and ... for- women/ menopauseflashes/ news- you- can- use- about- hormone- therapy. Menopause and The North American Menopause Society grant ...

  2. 7TH Annual Anesthesia and Critical Care Symposium (7th) Held in Paris (France) on 22-24 April 1994,

    DTIC Science & Technology

    1994-09-30

    sntramuscia iranet ponctions aresielles. EFFETS INDESIRABLES- htmnrragiquen en caurn ou ndmorragiss eaten Antdceanat m~ine aaramn a accidnet vasculerrs... hematoma patients transportation : A medical surgical challenge. D. HONNART (Dijon, France) 11.30 Munich emergency services information management

  3. Building Robust Systems with Fallible Construction (Batir des Systemes surs Partir de Constructions Faillibles)

    DTIC Science & Technology

    2009-05-01

    provide a communication link to military users and other NATO bodies. RTO’s scientific and technological work is carried out by Technical Teams...Professor of Communications Systems – Expertise: Self Managed Systems and Networks UNITED STATES Mary SHAW Institute for Software Research...des spécifications, d’erreurs de fabrication ou de mise en œuvre, ou d’une mauvaise communication entre les différentes équipes impliquées dans le

  4. A Study of Co-Relation between the Length of English Low Vowels and Diphthongs by Korean Exchange Students

    ERIC Educational Resources Information Center

    Park, Heesuk

    2010-01-01

    This paper aims at comparing the five English diphthongs, /ei/, /ou/, /au/, /ai/, /[inverted c]i/, in the aspect of length, to find out a common feature in /au/, ai/, /[inverted c]i/ and /ei/, and /ou/ and to see if there is any evidence between English low vowels and diphthongs. This study is a following research of Park (2009), and I analyzed…

  5. Entity Profiling for Intelligence Using the Graphical Overview of Social and Semantic Interactions of People (GOSSIP) Software Tool

    DTIC Science & Technology

    2010-11-01

    celles-ci. GOSSIP fait appel à un modèle informatique de système sémantique pour représenter la signification, ou le sens, de tous les mots ou...et à découvrir la nature des connexions entre celles−ci. GOSSIP fait appel à un modèle informatique de système sémantique pour représenter la

  6. Progress Toward Cleanup of Operable Unit 1 Groundwater at the US DOE Mound, Ohio, Site: Success of a Phase-Combined Remedy – 15310

    SciTech Connect

    Hooten, Gwendolyn; Cato, Rebecca; Looney, Brian; Huntsman, Brent

    2015-03-01

    Operable Unit 1 (OU-1) soil and groundwater have been affected by volatile organic compounds (VOC) Present groundwater remedy is collection, treatment, and disposal (pump and treat [P&T]) Several combinations of technologies were used to address soil and groundwater contamination Monitored natural attenuation (MNA) is a viable alternative Majority of source term has been excavated VOC concentrations in groundwater have decreased Attenuation mechanisms have been observed in the subsurface at OU-1

  7. Language Identification by Statistical Analysis

    DTIC Science & Technology

    1974-09-01

    8217\\ou10l■l^ou^omoL^ou• lOli >0’^o^’.0 OO OO OOOO O O OO OO OOO O O •■-«>-’•-••-•—<’-’■-’—•^^’-’’J’-,—<^’^’-1,~,,^l^f^"Ni-,’Jf>>’rNJ

  8. SHOP and M-SHOP: Planning With Ordered Task Decomposition

    DTIC Science & Technology

    2006-01-01

    every atom in A. More specifically, if t is a primitive task and there is an mgu u for t and h such that hu is ground, then the operator instance ou...respectively. Suppose there is an mgu u for t and h such that hu is ground and no atom in L is also in DE u. Then ou is applicable to t under L, and

  9. Rupture sous-cutanée du tendon long extenseur du pouce: à propos de 5 cas

    PubMed Central

    Abdelillah, Rachid; Abbassi, Najib; Erraji, Moncef; Abdeljawad, Najib; Yacoubi, Hicham; Daoudi, Abdelkrim

    2014-01-01

    La rupture spontanée du muscle long extenseur du pouce (EPL) du tendon au niveau du poignet est rare et principalement rapportés après fracture du radius distal à tubercule de Lister, dans la synovite, ténosynovite ou la polyarthrite rhumatoïde. Nous rapportons 5 cas de rupture spontanée du tendon long extenseur du pouce, traités par une greffe ou un transfert tendineux. PMID:25317233

  10. Groundwater modeling to support risk assessment at Rocky Flats Plant, Colorado

    SciTech Connect

    Newill, R.J.; Zhang, C.M.; Belcher, W.; Roberts, B.

    1994-12-31

    Operable Unit No. 2 (OU2) of the Rocky Flats Plant (RFP), located west of Denver, Colorado, has been the site of extensive environmental investigations related to contamination from past radioactive and chemical waste storage and disposal practices. As part of the OU2 Phase 2 RCRA Facility Investigation/Remedial Investigation (RFI/RI) process, numerical groundwater fate and transport modeling using the MODFLOW, MT3D, and ONED3 codes was performed to support the data needs of the OU2 Human Health Risk Assessment. Characterization of OU2 physical conditions indicates that complex subsurface geologic conditions dominate the hydrogeology and contaminant distribution and transport within OU2. Because the sole purpose of the groundwater fate and transport modeling for this project was to support the needs of the human health risk assessment, it was adequate to limit the degree of model complexity to that necessary to provide conservative estimates of contaminant loading to local creeks, thus resulting in conservative estimates of human health risk. To accomplish this, the complex, multi-layer, highly transient site conditions were simplified to an equivalent, single-layer, steady-state system that incorporated the large-scale behavior of the integrated OU2 system.

  11. Wetland Survey of Selected Areas in the Oak Ridge Y-12 Plant Area of Responsibilty, Oak Ridge, Tennessee

    SciTech Connect

    Rosensteel

    1997-01-01

    This document was prepared to summarize wetland surveys performed in the Y- 1 2 Plant area of responsibility in June and July 1994. Wetland surveys were conducted in three areas within the Oak Ridge Y- 12 Plant area of responsibility in June and July 1994: the Upper East Fork Poplar Creek (UEFPC) Operable Unit (OU), part of the Bear Creek Valley OU (the upper watershed of Bear Creek from the culvert under Bear Creek Road upstream through the Y-12 West End Environmental Management Area, and the catchment of Bear Creek North Tributary 1), and part of Chestnut Ridge OU 2 (the McCoy Branch area south of Bethel Valley Road). Using the criteria and methods set forth in the Wetlands Delineation Manual, 18 wetland areas were identified in the 3 areas surveyed; these areas were classified according to the system developed by Cowardin. Fourteen wetlands and one wetland/pond area that are associated with disturbed or remnant stream channels and seeps were identified in the UEFPC OU. Three wetlands were identified in the Bear Creek Valley OU portion of the survey area. One wetland was identified in the riparian zone of McCoy Branch in the southern portion of Chestnut Ridge OU 2.

  12. Applicability and methodology of determining sustainable yield in groundwater systems

    NASA Astrophysics Data System (ADS)

    Kalf, Frans R. P.; Woolley, Donald R.

    2005-03-01

    There is currently a need for a review of the definition and methodology of determining sustainable yield. The reasons are: (1) current definitions and concepts are ambiguous and non-physically based so cannot be used for quantitative application, (2) there is a need to eliminate varying interpretations and misinterpretations and provide a sound basis for application, (3) the notion that all groundwater systems either are or can be made to be sustainable is invalid, (4) often there are an excessive number of factors bound up in the definition that are not easily quantifiable, (5) there is often confusion between production facility optimal yield and basin sustainable yield, (6) in many semi-arid and arid environments groundwater systems cannot be sensibly developed using a sustained yield policy particularly where ecological constraints are applied. Derivation of sustainable yield using conservation of mass principles leads to expressions for basin sustainable, partial (non-sustainable) mining and total (non-sustainable) mining yields that can be readily determined using numerical modelling methods and selected on the basis of applied constraints. For some cases there has to be recognition that the groundwater resource is not renewable and its use cannot therefore be sustainable. In these cases, its destiny should be the best equitable use. ou peuvent devenir durable est invalide (4) souvent il y a un nombre de

  13. Capture-zone design in an aquifer influenced by cyclic fluctuations in hydraulic gradients

    NASA Astrophysics Data System (ADS)

    Zawadzki, Willy; Chorley, Don; Patrick, Guy

    2002-10-01

    alors réalisées sur la base du gradient hydraulique moyen déterminé au moyen de techniques de filtrage sur des mesures continues de la piézométrie. Lorsque la période de la fluctuation cyclique dans le gradient hydraulique est proche de ou supérieure au temps de parcours du contaminant, les variations résultantes de gradient hydraulique ne peuvent plus être ignorées. Dans ces cas-là, des procédures ont été mises au point pour prendre en compte ces fluctuations dans la conception de la zone d'extraction. Celles-ci prennent en considération la caractérisation propre du régime de la nappe, l'évaluation du temps de parcours moyen et de la période des fluctuations cycliques, et des techniques numériques qui permettent de considérer les fluctuations cycliques dans la conception de la zone d'extraction. Resumen. El diseño de un sistema de bombeo y tratamiento de aguas subterráneas para una instalación de manufactura de madera que está próxima al estuario del río Fraser, sometido a la influencia de las mareas, ha requerido el desarrollo de metodologías para tener en cuenta las variaciones cíclicas de los gradientes hidráulicos. El diseño de tales sistemas debe considerar los efectos de las fluctuaciones cíclicas en la captura de contaminantes en fase disuelta. Cuando el período de la fluctuación cíclica es mucho menor que el tiempo de tránsito del contaminante disuelto entre el punto de entrada y el de descarga, se puede ignorar las variaciones del gradiente hidráulico provocadas por dichos ciclos. Las zonas de captura se diseñan entonces en función del gradiente hidráulico promedio, que se determina mediante técnicas de filtrado de medidas continuas del nivel piezométrico. Cuando el período de la fluctuación cíclica del gradiente hidráulico es comparable o mayor que el tiempo de tránsito del contaminante, no puede ignorarse las variaciones resultantes en el gradiente hidráulico. En ese caso, se tiene que desarrollar

  14. Approaches to optimal aquifer management and intelligent control in a multiresolutional decision support system

    NASA Astrophysics Data System (ADS)

    Orr, Shlomo; Meystel, Alexander M.

    2005-03-01

    échelle donnée. Alors que l'accumulation d'incertitudes et, par conséquent, la stockasticité ou l'aléat a augmenté la perspicacité et amis en lumière d'importantes relations entre l'incertitude, la fiabilité, le risque, et leur effet sur les coûts de fonctionnement, il a également (a) introduit une complexité additionnelle qui résulte dans un pouvoir prohibitif des moyens de calcul informatique même pour une simple estimation de l'incertitude; et (b) a conduita une reconnaissance de notre manque d'aptitude à maîtriser l'incertitude totale même en introduisant tous les paramètres connus de l'incertitude. La représentation du changement est introduit: une adaptation de nouvelles méthodes de contrôle intelligent qui va relâcher la dépendance à la rigidité des algorithmes, aux calculs informatiques intensifs, à la PDE stockastique, et qui modifiera l'emphase entre les MRDS—systèmes interactifs d'aide à la décision de multiresolutionelle (flexibles, adaptables et orientables selon les objectifs)—avec un fort apprentissage non (orienté vers l'anticipation plutôt que la prédiction), et une capacité d'optimisation efficiente très élevée, qui pourrait apporter le besoin de solutions pour la modélisation des problèmes de management des aquifères réalistes. Cet article met en lumière les liens entre les développements passés et les futurs moyens d'optimisation, de gestion et de contrôle des systèmes hydrogéologiques. A pesar de nuevos avances notables en hidrología estocástica y las adaptaciones de métodos avanzados de investigación de operaciones, control estocástico, e inteligencia artificial, las soluciones de problemas complejos del mundo real en hidrogeología han sido bastante limitadas. La principal razón es la dependencia definitiva en modelos de primer-principio que conducen a ecuaciones parciales diferencias de parámetro distribuido complejas (PDE) a una escala dada. Mientras que la adición de incertidumbre, y

  15. Numerical analysis of the hydrogeologic controls in a layered coastal aquifer system, Oahu, Hawaii, USA

    NASA Astrophysics Data System (ADS)

    Oki, Delwyn S.; Souza, William R.; Bolke, Edward L.; Bauer, Glenn R.

    é hydraulique de la couverture dans son ensemble et les variations de la conductivité hydraulique liées à la stratigraphie de la couverture. A l'intérieur de la couverture, les variations de la conductivité hydraulique, dues à la stratigraphie ou à des discontinuités entre les unités stratigraphiques, sont le contrôle principal de la direction d'écoulement et de la répartition des niveaux et de la salinité de l'eau. La modélisation sur une section transversale a donné des résultats qui confirment l'organisation générale des directions d'écoulement, telle qu'elle pouvait être envisagée dans un aquifère littoral multicouche. L'écoulement souterrain est essentiellement vertical vers le haut dans les unités sédimentaires à faible perméabilité, et essentiellement horizontal dans les unités sédimentaires à forte perméabilité. Resumen El sistema acuífero costero de la zona sur de Oahu, en Hawaii, está formado por acuíferos volcánicos de alta permeabilidad, subyacentes a rocas volcánicas alteradas, con inclusiones de sedimentos marinos y terrestres, tanto de alta como de baja permeabilidad. Al conjunto de rocas volcánicas alteradas y sedimentos se le conoce por "tapón de roca", ya que impide la descarga libre de las aguas subterráneas del acuífero volcánico subyacente. Se usó un modelo de flujo de agua subterránea y transporte de solutos en sección vertical para evaluar los aspectos hidrogeológicos que controlan el flujo regional en la zona sudoeste de Oahu. Se consideraron: (a) la conductividad hidráulica global del tapón y (b) las variaciones estratigráficas de la conductividad hidráulica. En el tapón de roca, las variaciones de la conductividad hidráulica, causadas por la estratigrafía o por discontinuidades en las unidades estratigráficas, son las que controlan la dirección del flujo subterráneo y la distribución de niveles piezométricos y salinidad. Los resultados del modelo en sección transversal confirman la distribuci

  16. Marine hydrogeology: recent accomplishments and future opportunities

    NASA Astrophysics Data System (ADS)

    Fisher, A. T.

    2005-03-01

    l'estimation des propriétés à la sub-surface des fonds marins, et des travaux complémentaires ont mis en valeur les mesures de flux, local ou global, de termes « sources » et « pertes », et des liens quantitatifs entre l'hydrogéologie, la chimie, la tectonique, la biologie, et les processus géophysiques. Cet article vise à résumer des résultats sélectionnés parmi un petit nombre d'études, et à décrire plusieurs nouvelles expériences et programmes, qui sont autant d'opportunités pour répondre aux questions fondamentales relatives aux fonds marins, posées ces dernières 20-30 années. La hidrogeología marina es una disciplina científica de amplios alcances que involucra la exploración de interacciones fluido-roca por debajo del fondo del mar. Se han llevado a cabo estudios en centros de expansión del fondo del mar, lugares en medio de una placa, y en ambientes de placa y margen continental. Aunque muchos sitios en el fondo del mar son remotos, existen aspectos de estos sistemas marinos que los hacen particularmente adaptables para análisis hidrológico. Nuevas técnicas y herramientas desarrolladas, y el establecimiento de varios programas multidisciplinarios para exploración oceanográfica, han ayudado a impulsar la hidrogeología marina hacia delante durante las ultimas décadas. La mayor parte del trabajo hidrogeológico marino se ha enfocado en la medición o estimación de propiedades hidrogeológicas dentro del subsuelo superficial, pero trabajo adicionalha enfatizado mediciones de flujos globales y locales, términos de fuente y sumidero de fluidos, y vínculos cuantitativos entre procesos hidrogeológicos, químicos, tectónicos, biológicos y geofísicos. Además de resumir resultados seleccionados de un número pequeño de estudios de caso, este artículo incluye una descripción de varios programas y experimentos nuevos que aportarán oportunidades excepcionales para dirigir preguntas hidrogeológicas fundamentales dentro del

  17. STRATEGIES IN SEARCHING HOMOGENEITY IN A FACULTY OF A POSTGRADUATE PROGRAM.

    PubMed

    Cecatti, José G; Fernandes, Karayna G; Souza, Renato T; Silveira, Carla; Surita, Fernanda G

    2015-01-01

    students´ teams. O docente tem importância fundamental no programa de pós-graduação, pois é quem planeja e executa grande parte das tarefas, sendo também o responsável por difundir conhecimentos aos alunos. O professor deve utilizar recursos didáticos que o qualifiquem continuamente, criando condições favoráveis para que o aluno se desenvolva e aprenda da melhor maneira e com mais facilidade. A homogeneidade no grupo de pós-graduação consiste da presença de subgrupos de pesquisa correspondentes às Áreas de Concentração, onde cada subgrupo trabalhe com algumas linhas de pesquisas diversificadas. É desejável que o corpo docente tenha significativa produção científica, de qualidade e distribuída homogeneamente entre os docentes. Estes devem sistematicamente buscar recursos em agências de fomento para pesquisa, tanto para o custeio dos estudos, quanto para a valorização dos pesquisadores envolvidos em todas as atividades. Os programas de pós-graduação precisam investir na formação de seus docentes, os quais devem aprimorar seus conhecimentos em epidemiologia de estudos clínicos, ética em pesquisa e em didática. Duas das características do sistema de pós-graduação no Brasil são a nucleação e a solidariedade, embasadas na capacidade e/ou interesse dos mais estruturados se solidarizarem com os programas iniciantes, cooperando com as suas atividades. A Capes valoriza a inserção social no contexto das atividades dos programas de pós-graduação, prevendo nos critérios de avaliação o reconhecimento de atividades com impacto tecnológico, cultural, educacional e social. Existe um modelo ideal de pós-graduação? Partimos do pressuposto de que não há uma fórmula matemática ou modelo ideal de pós-graduação e sim que cada instituição deve se adequar e buscar aperfeiçoar seu corpo docente e discente.

  18. Service configuration, unit characteristics and variation in intervention rates in a national sample of obstetric units in England: an exploratory analysis

    PubMed Central

    Rowe, Rachel E; Townend, John; Brocklehurst, Peter; Knight, Marian; Macfarlane, Alison; McCourt, Christine; Newburn, Mary; Redshaw, Maggie; Sandall, Jane; Silverton, Louise; Hollowell, Jennifer

    2014-01-01

    Objectives To explore whether service configuration and obstetric unit (OU) characteristics explain variation in OU intervention rates in ‘low-risk’ women. Design Ecological study using funnel plots to explore unit-level variations in adjusted intervention rates and simple linear regression, stratified by parity, to investigate possible associations between unit characteristics/configuration and adjusted intervention rates in planned OU births. Characteristics considered: OU size, presence of an alongside midwifery unit (AMU), proportion of births in the National Health Service (NHS) trust planned in midwifery units or at home and midwifery ‘under’ staffing. Setting 36 OUs in England. Participants ‘Low-risk’ women with a ‘term’ pregnancy planning vaginal birth in a stratified, random sample of 36 OUs. Main outcome measures Adjusted rates of intrapartum caesarean section, instrumental delivery and two composite measures capturing birth without intervention (‘straightforward’ and ‘normal’ birth). Results Funnel plots showed unexplained variation in adjusted intervention rates. In NHS trusts where proportionately more non-OU births were planned, adjusted intrapartum caesarean section rates in the planned OU births were significantly higher (nulliparous: R2=31.8%, coefficient=0.31, p=0.02; multiparous: R2=43.2%, coefficient=0.23, p=0.01), and for multiparous women, rates of ‘straightforward’ (R2=26.3%, coefficient=−0.22, p=0.01) and ‘normal’ birth (R2=17.5%, coefficient=0.24, p=0.01) were lower. The size of the OU (number of births), midwifery ‘under’ staffing levels (the proportion of shifts where there were more women than midwives) and the presence of an AMU were associated with significant variation in some interventions. Conclusions Trusts with greater provision of non-OU intrapartum care may have higher intervention rates in planned ‘low-risk’ OU births, but at a trust level this is likely to be more than offset by lower

  19. Comparison of the traditional pharmaceutical validation method versus an assisted pharmaceutical validation in hospitalized patients.

    PubMed

    García Marco, D; Hernández Sánchez, M V; Sanz Márquez, S; Pérez Encinas, M; Fernández-Shaw Toda, C; Jiménez Cerezo, M J; Ferrari Piquero, J M; Martínez Camacho, M

    2016-05-01

    Objetivo: Analizar las intervenciones farmacéuticas realizadas con el apoyo de un sistema automático de validación de tratamientos vs. el método tradicional sin apoyo informático. Metodos: El programa automatizado, ALTOMEDICAMENTOS ® version 0, cuenta con 925.052 celdas con información de aproximadamente 20.000 medicamentos, analizando dosis, vías de administración, días de tratamiento, dosificación en insuficiencia renal y hepática, control de interacciones, de medicamentos semejantes y de medicamentos por vía enteral. Durante ocho días distribuidos en cuatro hospitales diferentes (alta complejidad con más de 1.000 camas, intermedio de 400 camas, geriátrico y monográfico), los mismos pacientes y tratamientos se analizaron mediante los dos sistemas. Resultados: Se han analizado 3.490 pacientes diferentes con 42.155 tratamientos. Por el sistema tradicional se han realizado 238 intervenciones (0,56% intervenciones/posibles intervenciones) vs. 580 (1,38%) con el automatizado. Las intervenciones farmacéuticas muy significativas fueron 0,14 vs. 0,46%, las significativas 0,38 vs. 0,90%, las no significativas 0,05 vs. 0,01%. Las intervenciones fueron del 1,85% al utilizar los dos sistemas vs. 0.56% usando solo el sistema tradicional. El sistema tradicional detectó el 30,5% de las posibles intervenciones, sin embargo con el sistema automático se detectaron el 84% de dichas intervenciones. Conclusiones: La automatización multiplica entre 2,43 a 3,64 veces las intervenciones farmacéuticas. En base a los resultados de este estudio el sistema tradicional de validación debería ser modificado, apoyándose en sistemas automatizados. El programa automático funciona en diferentes hospitales.

  20. Large-Scale Pumping Test Recommendations for the 200-ZP-1 Operable Unit

    SciTech Connect

    Spane, Frank A.

    2010-09-08

    CH2M Hill Plateau Remediation Company (CHPRC) is currently assessing aquifer characterization needs to optimize pump-and-treat remedial strategies (e.g., extraction well pumping rates, pumping schedule/design) in the 200-ZP-1 operable unit (OU), and in particular for the immediate area of the 241 TX-TY Tank Farm. Specifically, CHPRC is focusing on hydrologic characterization opportunities that may be available for newly constructed and planned ZP-1 extraction wells. These new extraction wells will be used to further refine the 3-dimensional subsurface contaminant distribution within this area and will be used in concert with other existing pump-and-treat wells to remediate the existing carbon tetrachloride contaminant plume. Currently, 14 extraction wells are actively used in the Interim Record of Decision ZP-1 pump-and-treat system for the purpose of remediating the existing carbon tetrachloride contamination in groundwater within this general area. As many as 20 new extraction wells and 17 injection wells may be installed to support final pump-and-treat operations within the OU area. It should be noted that although the report specifically refers to the 200-ZP-1 OU, the large-scale test recommendations are also applicable to the adjacent 200-UP-1 OU area. This is because of the similar hydrogeologic conditions exhibited within these two adjoining OU locations.

  1. Predicting odour emissions from wastewater treatment plants by means of odour emission factors.

    PubMed

    Capelli, Laura; Sironi, Selena; Del Rosso, Renato; Céntola, Paolo

    2009-04-01

    In this study, the results of odour concentration measurements on different wastewater treatment plants are presented and used in order to estimate the odour emission factors relevant to single odour sources. An odour emission factor is a representative value that relates the quantity of odour released to the atmosphere to a specific activity index, which in this case was the plant treatment capacity, resulting in an odour emission factor expressed in odour units per cubic metre of treated sewage. The results show that the major odour source of a wastewater treatment plant is represented by the primary sedimentation (with an OEF equal to 1.9 x 10(5)ou(E) m(-3)). In general, the highest OEFs are observed in correspondence of the first steps of the wastewater depuration cycle (OEF between 1.1 x 10(4)ou(E) m(-3) and 1.9 x 10(5)ou(E) m(-3)) and tend to decrease along the depuration process (OEF between 7.4 x 10(3)ou(E) m(-3) and 4.3 x 10(4)ou(E) m(-3)). In general, the OEFs calculated according to this approach represent a model for a rough prediction of odour emissions independently from the specific characteristics of the different plants.

  2. The Importance of the KR-Rich Region of the Coat Protein of Ourmia melon virus for Host Specificity, Tissue Tropism, and Interference With Antiviral Defense.

    PubMed

    Rossi, Marika; Vallino, Marta; Abbà, Simona; Ciuffo, Marina; Balestrini, Raffaella; Genre, Andrea; Turina, Massimo

    2015-01-01

    The N-terminal region of the Ourmia melon virus (OuMV) coat protein (CP) contains a short lysine/arginine-rich (KR) region. By alanine scanning mutagenesis, we showed that the KR region influences pathogenicity and virulence of OuMV without altering viral particle assembly. A mutant, called OuMV6710, with three basic residue substitutions in the KR region, was impaired in the ability to maintain the initial systemic infection in Nicotiana benthamiana and to infect both cucumber and melon plants systemically. The integrity of this protein region was also crucial for encapsidation of viral genomic RNA; in fact, certain mutations within the KR region partially compromised the RNA encapsidation efficiency of the CP. In Arabidopsis thaliana Col-0, OuMV6710 was impaired in particle accumulation; however, this phenotype was abolished in dcl2/dcl4 and dcl2/dcl3/dcl4 Arabidopsis mutants defective for antiviral silencing. Moreover, in contrast to CPwt, in situ immunolocalization experiments indicated that CP6710 accumulates efficiently in the spongy mesophyll tissue of infected N. benthamiana and A. thaliana leaves but only occasionally infects palisade tissues. These results provided strong evidence of a crucial role for OuMV CP during viral infection and highlighted the relevance of the KR region in determining tissue tropism, host range, pathogenicity, and RNA affinity, which may be all correlated with a possible CP silencing-suppression activity.

  3. Superfund Record of Decision (EPA Region 5): Oconomowoc Electroplating Company site, Ashippun, WI. (First remedial action), September 1990

    SciTech Connect

    Not Available

    1990-09-20

    The 10.5-acre Oconomowoc Electroplating site encompasses a 5-acre active electroplating facility and 5 acres of adjacent wetlands in Dodge County, Ashippun, Wisconsin. Electroplating, finishing, and degreasing processes performed since 1957 at the OEC facility produce a multi-source effluent stream contaminated with heavy metals and VOCs. The effluent, as well as accidental spills and leaks around the property, have resulted in widespread site contamination. Prior to 1972, untreated wastewaters were discharged directly into the Davy Creek wetlands, and even after the construction of two treatment lagoons, untreated wastes and sludge overflowed the lagoons and continued to accumulate in the wetlands. Lagoon sludge removal was initiated by OEC in 1979 but was never completed, and therefore, discharge of contaminants, including RCRA-listed hazardous waste (F006), continued into the wetlands. Due to its complexity, the site has been divided into four Operable Units (OU) for remediation: the surface water, sludge and contaminated soil associated with the two lagoons (OU1); all other contaminated soil around the OEC facility not associated with the lagoons or found beneath the manufacturing building, including a fill area, a lowlands area, the drainage ditches and the parking lot area (OU2); the associated contaminated ground water (OU3); and the highly contaminated sediment in the Davy Creek wetlands area (OU4). The primary contaminants of concern affecting the soil, sediment, debris, sludge, ground water and surface water are VOCs including TCE, toluene, and xylenes; and metals including chromium and lead.

  4. Post-Closure Land Jurisdiction Transfer to the US Fish and Wildlife Service at Rocky Flats: Surviving the Safari Through Old Records and Other Lessons Learned

    SciTech Connect

    Schiesswohl, S.; Hanson, M.

    2008-07-01

    The U.S. Department of Energy's (DOE's) Rocky Flats Site (Rocky Flats), located near Denver, Colorado, was listed on the Comprehensive Environmental Response, Compensation, and Liability Act National Priorities List (NPL) in 1989. Subsequent cleanup and closure activities were completed in October 2005 and the final remedy was selected in September 2006. The remedy is 'no further action' for the generally un-impacted Peripheral Operable Unit (OU), formerly known as the Buffer Zone, and institutional and physical controls with continued monitoring for the Central OU, formerly the industrialized area. The Peripheral OU has been deleted from the NPL and jurisdiction over the majority of land in that OU (3,953 acres) was transferred to the U.S. Fish and Wildlife Service (USFWS) on July 12, 2007, to establish the Rocky Flats National Wildlife Refuge. The remaining approximately 929 acres in the Peripheral OU were retained by DOE's Office of Legacy Management where outstanding mineral leases and mining operations exist. As mineral rights are purchased or mining operations and mineral leases are completed and fully reclaimed, jurisdiction of portions of the 929 acres will also be transferred to USFWS for inclusion into the refuge. During the almost 2 years since cleanup and closure work was completed at Rocky Flats, DOE and USFWS have worked the specific legal parameters, timing, and constraints of the 3,953-acre transfer. Many lessons have been learned, based on these early experiences. (authors)

  5. Superfund Record of Decision (EPA Region 9): Andersen Air Force Base, Operable Unit 3 (MARBO Annex), Yigo, Guam, June 16, 1998

    SciTech Connect

    1999-03-01

    This decision document, a Record of Decision (ROD), presents the selected remedial actions for soil and groundwater at the Marianas/Bonnis Command (MARBO) Annex Operable Unit (OU) at Andersen Air Force Base (AFB), Guam. No risk was found at Waste Pile 5 and the War Dog Borrow Pit, so no further action is planned for these two sites. Current risks associated with soil exceed acceptable risk levels at Waste Pile 6, Waste Pile 7, Landfill 29, and the MARBO Laundry. Based on alternatives evaluated in the OU 3 Focused FS the US Air Force, the USEPA, and Guam have selected Soil Removal (Alternative OU3-D) as the remedy for three of the sites, and Soil Cover (Alternative OU3-C) for one of the sites. Based on alternatives evaluated in the OU-2 Focused FS, the USAF, the USEPA, and the Guam EPA have selected Natural Attenuation with Wellhead Treatment (Alternative G-2) as the remedy for the TCE and PCE contaminated groundwater beneath the MARBO Annex.

  6. Appendicite chronique chez les enfants

    PubMed Central

    Kim, David; Butterworth, Sonia A.; Goldman, Ran D.

    2016-01-01

    Résumé Question Alors que le diagnostic d’appendicite aigu est relativement simple à poser, celui d’appendicite chronique peut être controversé et souvent mal posé. De quelle manière et à quel moment les cliniciens devraient-ils investiguer l’appendicite chronique comme la cause de douleurs abdominales chroniques et récidivantes dans la population pédiatrique? Réponse L’appendicite chronique est une inflammation ou fibrose de longue date de l’appendice dont le tableau clinique est une douleur abdominale prolongée ou intermittente. Son diagnostic est souvent difficile à poser et elle peut entraîner des complications telles que des infections intra-abdominales, ou l’occlusion ou la perforation de l’intestin. Le tableau clinique, de même que les études d’imagerie, peuvent aider le clinicien à écarter d’autres affections, et chez les patients qui reçoivent un diagnostic, dont de nombreux enfants, l’appendicectomie soulage partiellement ou complètement la douleur.

  7. Operable Unit 1 remedial investigation report, Eielson Air Force Base, Alaska

    SciTech Connect

    Gilmore, T.J.; Fruland, R.M.; Liikala, T.L.

    1994-06-01

    This remedial investigation report for operable Unit 1 (OU-1) at Eielson Air Force Base presents data, calculations, and conclusions as to the nature and extent of surface and subsurface contamination at the eight source areas that make up OU-1. The information is based on the 1993 field investigation result and previous investigations. This report is the first in a set of three for OU-1. The other reports are the baseline risk assessment and feasibility study. The information in these reports will lead to a Record of Decision that will guide and conclude the environmental restoration effort for OU-1 at Eielson Air Force Base. The primary contaminants of concern include fuels and fuel-related contaminants (diesel; benzene, toluene, ethylbenzene, and xylene; total petroleum hydrocarbon; polycyclic aromatic hydrocarbons), maintenance-related solvents and cleaners (volatile chlorinated hydrocarbons such as trichloroothylene), polychlorinated biphenyls, and dichlorodiphenyltrichloroethane (DDT). The origins of contaminants of concern include leaks from storage tanks, drums and piping, and spills. Ongoing operations and past sitewide practices also contribute to contaminants of concern at OU-1 source areas. These include spraying mixed oil and solvent wastes on unpaved roads and aerial spraying of DDT.

  8. Superfund record of decision (EPA Region 8): Sand Creek Industrial Site (Operable Unit 4), Commerce City, CO, April 1994

    SciTech Connect

    Not Available

    1994-07-01

    The decision document presents the selected remedy for Operable Unit 4 (OU4), Site-wide groundwater at the Sand Creek Industrial Superfund Site in Commerce City, Colorado. The Sand Creek Industrial Superfund Site has an extensive history of industrial use, including pesticide manufacturing, petroleum refining, acidic waste disposal, municipul landfilling, and chemical storage and distribution. OU4 addresses groundwater underlying the Site and is contaminated with volatile organic compounds (VOCs), semi-volatile organic compounds (SVOCs), pesticides, and metals. The remedy selected for OU4 will minimize direct contact with and ingestion of groundwater underlying the Site and prevents further offsite migration of contaminants in excess of federal and state groundwater standards. Municipal water for the area surrounding OU4 is supplied by the South Adams County Water and Sanitation District (SACWSD) and the Denver Water Department (DWD). Water supplied by the DWD is obtained primarily from surface-water sources located outside of the Site area. Residents near the OU4 area are not currently using contaminated groundwater for domestic purposes.

  9. Two-stage application of the optimised uncertainty method: a practical assessment.

    PubMed

    Lyn, Jennifer A; Ramsey, Michael H; Damant, Andrew P; Wood, Roger

    2005-09-01

    Uncertainty estimates from routine sampling and analytical procedures can be assessed as being fit for purpose using the optimised uncertainty (OU) method. The OU method recommends an optimal level of uncertainty that should be reached in order to minimise the expected financial loss, given a misclassification of a batch as a result of the uncertainty. Sampling theory can used as a predictive tool when a change in sampling uncertainty is recommended by the OU method. The OU methodology has been applied iteratively for the first time using a case study of wholesale butter and the determination of five quality indicators (moisture, fat, solids-not-fat (SNF), peroxide value (PV) and free fatty acid (FFA)). The sampling uncertainty (s(samp)) was found to be sub-optimal for moisture and PV determination, for 3-fold composite samples. A revised sampling protocol was devised using Gy's sampling theory. It was predicted that an increase in sample mass would reduce the sampling uncertainty to the optimal level, resulting in a saving in expectation of loss of over pounds 2000 per 20 tonne batch, when compared to current methods. Application of the optimal protocol did not however, achieve the desired reduction in s(samp) due to limitations in sampling theory. The OU methodology proved to be a useful tool in identifying broad weaknesses within a routine protocol and assessing fitness for purpose. However, the successful routine application of sampling theory, as part of the optimisation process, requires substantial prior knowledge of the sampling target.

  10. Superfund Record of Decision (EPA Region 3): Naval Weapons Station-Yorktown, Operable Units 6 and 7, Yorktown, VA, March 23, 1998

    SciTech Connect

    Not Available

    1999-03-01

    This Record of Decision (ROD) documents the selected remedial action to reduce the risks posed by soil, surface water and sediment at Site 9 and soil at Site 19 located at WPNSTA Yorktown, Yorktown, Virginia. Soil contaminated by 2,4,6-trinitrotoluene (2,4,6-TNT) and RDX (explosives) at Site 19 is designated as OU VI and soil, surface water, and sediment at Site 9 are designated as OU VII. Major components of the selected remedy for OUs VI and VII include: OU VI -- Dismantling and disposal of the Site 19 conveyor belt; Excavation of soil beneath the belt to a depth of approximately 4 feet; Excavation of aluminum contaminated soil (above Station-wide background) to approximately 6 inches around Building 527 and disposal in the bottom of the conveyor belt excavation area; Backfilling (with clean soil) and regarding the conveyor belt area and the area around building 527; and Biological treatment of excavated explosives-contaminated soil at the WPNSTA Yorktown biocell and placement of treated soil at Site 22 (Former Burn Pad) now occupied by the WPNSTA Yorktown biocell; and OU VII -- No action at OU VII.

  11. [Utility of a pneumatic system to transport erythrocyte concentrates: pilot study].

    PubMed

    Castillo-Torres, Noemí Patricia; Virgen-Díaz, Surid; León-Olvera, Daira L; Hernández-Pérez, Ana L; Calderón-Abbo, Moisés C

    2014-01-01

    INTRODUCCIÓN: los sistemas de transporte de componentes eritrocitarios deben ser seguros y modernos. En este trabajo se analiza la seguridad de un sistema neumático como medio de transporte de concentrados eritrocitarios del servicio de transfusiones al servicio de la terapia posquirúrgica. MÉTODOS: se estudiaron las muestras piloto de 50 concentrados eritrocitarios, previa homogeneización del tubo con pinza rotatoria. Se obtuvieron 1.5 mL de la muestra antes de enviar el concentrado eritrocitario por el sistema neumático y 1.5 mL después de su llegada a su destino. Las muestras fueron colocadas en tubos de cristal para su análisis. También se analizaron la concentración de hemoglobina, el nivel de hematócrito y la concentración de potasio extracelular.

  12. Farmyard Manure and Fertilizer Effects on Seed Potato (Solanum tuberosum L.) Yield in Green House Production

    NASA Astrophysics Data System (ADS)

    László, M.

    2009-04-01

    cultura da batata podem ser de ordem agronómica, economica e comercial. Como exemplos destes podem ser citados: o uso racional de matérias orgânicos, esterco de curral e inorgânico fertilizantes. Efeito de materias orgnicânicos e N, P, K elementos minerais para produção da batata As necessidades em N, P, e K elementos minerais da batata são superidas pela aplicação apropriada de matérias orgânicos, esterco de currals, fertilizantes ao solo, combinada com a ambiente (Márton 2001a., 2001b.), época adequada e posição ideal de aplicá- lo. Efeito da materias orgânicos O suprimento de N á batateira provém principalmente da matéria orgânica do solo e do fertilizante aplicado (László 2000a., Márton et all. 2000.). Embora não seja muito praticado no Brasíl, a incorporação de esterco ao solo é fator de aumento da produção de tuberculos. Este resultado favorável poderia ser atribuído ao melhoramento da estrutura do solo, á maior retenção de água pelo e mesmo favorecendo o melhor desenvolvimento do sistema radicular da planta. A batata pode ser cultivada em todo tipo de solo desde que tenha boa drenagem e seja bem estruturado. Isto é tem que ser bem aerado e permitir o bom desenvolvimento dos órgãos subterráneos da batateira. Sem de matéria orgânicos e esterco de curral a tendencia de determinados solos formar crosta, oferecendo uma alta resisténcia mecánica á emergéncia das plantas, pode ser um determinante de stands desuniformes. A cause primaria da formação de crostas é a destruição dos agregados do solo pela excessiva manipulação mecánica resultando em aeração reduzida e aumento da densidade e coesão das particulas do solo. O encrostamento do solo pode ser reduzido através com matérias orgânicos. De maneira geral, a produção de tuberculos em solo de baixa potencialidade (aqueles em que a penetração das raizes é dificultada pela compactação, textura argilosa ou com camadas no solo) será menor do que nagueles com

  13. Superfund Record of Decision (EPA region 3): Sand, Gravel and Stone site, Elkton, MD. (Second remedial action), September 1990

    SciTech Connect

    Not Available

    1990-09-28

    The 200-acre Sand, Gravel and Stone site is a former sand and gravel quarry three miles west of the town of Elkton, in Cecil County, Maryland, along a tributary to Mill Creek. Surface water in Mill Creek eventually flows to the Elk River and the Chesapeake Bay. Beginning in 1969, hazardous materials were disposed of onsite. In 1974, a pool of chemical waste burned in a onsite fire. The site has been separated into three operable units (OU). The ROD focuses on OU2, the threat posed by soil and ground water contamination migrating from the eastern portion of the site, including remediation of ground water contamination in the lower aquifers if needed. A future ROD will address OU3. The primary contaminants of concern affecting the ground water are VOCs, including benzene and toluene; and metals.

  14. Superfund record of decision (EPA Region 4): Homestead Air Reserve Base, operable unit 1, Site FT-5, Dade County, FL, September 7, 1995

    SciTech Connect

    1996-03-01

    This decision document presents the selected remedial action for the Fire Protection Training Area No. 2 (Site FT-5), Operable Unit No. 1 (OU-1), at Homestead Air Reserve Base, in Homestead, Florida. The major components of the selected remedy include: implementation of deed restrictions or restrictive covenants to limit usage of Site FT-5/OU-1 to prevent schools, playgrounds, hospitals, and residential units from being built at OU-1 to limit exposure to adults and children; eliminate and prevent the practice of continued rubble disposal at the site; restrict the placement of potable water wells into the contaminated groundwater beneath the site; two years of semiannual groundwater monitoring followed by a review of the site to assess the migration and attenuation of groundwater contaminants; and five year review to determine whether the site remains protective of human health and the environment and evaluate the need for further action, if required.

  15. Contrôle de l'orientation et de l'alignement moléculaire par un train d'impulsions soudaines

    NASA Astrophysics Data System (ADS)

    Sugny, D.

    2006-10-01

    Les récents progrès technologiques dans le domaine des Lasers permettent d'envisager le contrôle de nombreux processus quantiques jouant un rôle dans une variété de problèmes s'étendant de la réactivité chimique à l'information quantique. Dans ce contexte, nous nous sommes intéressés au contrôle de l'orientation ou de l'alignement moléculaire en utilisant un train d'impulsions soudaines. Nous avons défini des états cibles qui maximisent à la fois l'orientation ou l'alignement et sa durée dans le temps et montré comment atteindre ces états à l'aide de stratégie systématique ou optimisée

  16. Treatability Study Operational Testing Program and Implementation Plan for the Gunite and Associated Tanks at the Oak Ridge National Laboratory, Oak Ridge, Tennessee

    SciTech Connect

    1996-09-01

    To support future decision making of the Gunite and Associated Tanks (GAAT) Operable Unit (OU) remedy selection, the Department of Energy (DOE) is performing a Treatability Study (TS), consistent with the EPA guidance for Comprehensive Environmental Response, compensation, and Liability Act (CERCLA) treatability studies. The study will inform stakeholders about various waste removal technologies and the cost of potential remediation approaches, particularly the cost associated with sluicing and the reduction in risk to human health and the environment from tank content removal. As part of the GAAT OU remedy, a series of studies and technology tests will be preformed. These may address one or more of the following areas, characterization, removal, treatment, and transfer of wastes stored in the GAAT OU.

  17. Superfund Record of Decision (EPA Region 10): Puget Sound Naval Shipyard Complex, (Operable Unit NSC) (aka: Bremerton Naval Complex), Bremerton, WA, December 13, 1996

    SciTech Connect

    1997-11-01

    This decision document presents the selected action for Operable Unit NSC (OU NSC) at the Bremerton Naval Complex in Bremerton, Washington. The selected remedy for OU NSC includes: controlling access to the Bremerton Naval Complex through security measures such as fences and signs; establishing administrative measures to prohibit use of groundwater from site; implementing deed restrictions to limit future usage of the site; developing a management excavation plan to limit potential contact with, and assure appropriate handling and disposal of, soils excavated during future excavation connected with any construction activity at the site; upgrading site paving to reduce the possibility of contact with contaminated soil and limit the potential for precipitation to transport contaminants from soil to the groundwater; collecting and disposing of sediments and debris accumulated in storm drain lines serving OU NSC; and conducting environmental monitoring to detect any change in the quality of groundwater at the site.

  18. The Gamma renewal process as an output of the diffusion leaky integrate-and-fire neuronal model.

    PubMed

    Lansky, Petr; Sacerdote, Laura; Zucca, Cristina

    2016-06-01

    Statistical properties of spike trains as well as other neurophysiological data suggest a number of mathematical models of neurons. These models range from entirely descriptive ones to those deduced from the properties of the real neurons. One of them, the diffusion leaky integrate-and-fire neuronal model, which is based on the Ornstein-Uhlenbeck (OU) stochastic process that is restricted by an absorbing barrier, can describe a wide range of neuronal activity in terms of its parameters. These parameters are readily associated with known physiological mechanisms. The other model is descriptive, Gamma renewal process, and its parameters only reflect the observed experimental data or assumed theoretical properties. Both of these commonly used models are related here. We show under which conditions the Gamma model is an output from the diffusion OU model. In some cases, we can see that the Gamma distribution is unrealistic to be achieved for the employed parameters of the OU process.

  19. La matiere noire dans l'Univers.

    NASA Astrophysics Data System (ADS)

    Mamon, G.

    Parmi les mille questions que l'on peut se poser sur l'Univers, les plus fondamentales concernent son contenu : De quoi est faite la matière de l'Univers ? Est-ce que la matière de l'Univers est principalement constituée d'étoiles, ou bien de gaz interstellaire, de poussières interstellaires, de planètes, petits astéroïdes, ou de trous noirs ? Ou doit-on admettre que l'Univers est composé d'une autre forme de matière que l'on ne connaît pas, qui serait basée sur des particules élémentaires plus exotiques que les protons, neutrons et électrons qui constituent la matière ordinaire, dite baryonique?

  20. Cardiomyopathie du péripartum: à propos d’une observation et revue de la littérature

    PubMed Central

    Bouzerda, Abdelmajid

    2016-01-01

    La cardiomyopathie du péripartum ou cardiomyopathie gravidique primitive, est une entité rare et méconnue définie comme une insuffisance cardiaque systolique survenant le dernier mois de la grossesse ou les cinq premiers mois du postpartum en l'absence d'étiologie connue ou de cardiopathie préexistante. Nous rapportons l'observation d'une jeune patiente de 31 ans sans antécédents pathologiques particuliers admise pour une poussée d'insuffisance cardiaque gauche 1mois après son accouchement. Le contexte de péripartum nous a fait penser au diagnostic et a motivé la réalisation d'une Echocardiographie qui a confirmé cette entité. PMID:28154713

  1. [Hypofractionation in locally advanced breast cancer: "flash" scheme].

    PubMed

    Padilha, Marisa; Gonçalves, Sara; Fardilha, Carlos; Melo, Gilberto; Miranda, Cristina; Alves, Paula

    2013-01-01

    Introdução: O carcinoma da mama é uma das principais causas de morte no nosso país. No Serviço de Radioterapia do Instituto Português de Oncologia de Coimbra de Coimbra utilizamos, desde há mais de 30 anos, um esquema de hipofraccionamento de radioterapia, denominado “Flash”, como opção terapêutica em doentes idosos ou com baixo Performance Status, portadores de carcinoma da mama localmente avançado ou com estádios IIb ou IV, com intenção neoadjuvante ou paliativa. Objectivos: Avaliar a resposta ao tratamento, nomeadamente sobrevivência global aos três anos, resposta local e toxicidades aguda e crónica, no grupo de doentes seleccionados submetidos a esquema de hipofraccionamento, em estudo retrospectivo. Metodologia: Entre Janeiro de 2006 e Dezembro de 2008, um total de 83 doentes com diagnóstico de Carcinoma da Mama Localmente Avançado ou com estádios IIb ou IV, foi submetido a “Flash” mamário. A dose de radioterapia prescrita foi de 13Gy / 2Fr / 3 dias (em 23 doentes - 27,7%) e 26Gy / 4Fr / 2,5 semanas (em 60 doentes - 72,3%), com fotões de 4 MV, sobre a mama afectada. Foi avaliada sobrevivência global segundo o método de Kaplan-Meier. A análise estatística foi efectuada através da aplicação SPSS, versão 17.0 e os testes estatísticos foram avaliados ao nível de significância de 5%. Resultados: 80 doentes (96,4%) que efectuaram “Flash” mamário eram do género feminino, com idades compreendidas entre os 59 e os 93 anos (idade média 80,72 + 5,87 anos) e Performance Status (Karnosfsky: 0 - 100) entre 90 e 50%. Em 72 doentes (86,7%) o diagnóstico histológico foi Carcinoma Ductal Invasivo. A cirurgia após a realização do “Flash” Mamário foi realizada em 44 doentes (53%) após evidência de resposta local à radioterapia, sendo a Mastectomia Radical Modificada a técnica cirúrgica mais frequente. Efectuou-se o diagnóstico de metastização óssea em 10 doentes (12%), sendo que a taxa de sobrevivência global foi

  2. Combined Spectroscopic and Interferometric (NPOI) Observations of the Be Star o Cassiopeiae

    DTIC Science & Technology

    2010-01-01

    orbitales de este sistema SB1 implican una función de masa muy alta de alrededor de una masa solar . Esto implica una masa muy alta de la estrella...caracteŕısticas de este sistema binario peculiar. ABSTRACT The analysis of radial velocities of the Be star o Cas from spectra taken between 1992 and...in 1978, but later refuted by several authors. The orbital parameters of this SB1 system imply a very high mass function of about one solar mass. This

  3. Aplicación del Teorema de Nekhorochev para tiempos de estabilidad en Mecánica Celeste

    NASA Astrophysics Data System (ADS)

    Miloni, O.; Núñez, J.; Brunini, A.

    En Mecánica Celeste, uno de los problemas centrales consiste en la determinación de los tiempos de estabilidad. El teorema de Nekhorochev proporciona un método para dicho estudio, para un sistema determinado por un hamiltoniano descripto en las variables acción-ángulo. El trabajo consiste en la acotación tanto del potencial perturbador y de la matriz hessiana del hamiltoniano integrable para determinar luego el tiempo de estabilidad de dicho sistema, donde por estabilidad se entiende la separación en norma infinito en el espacio de las acciones.

  4. Voting Systems for Environmental Decisions

    PubMed Central

    BURGMAN, MARK A; REGAN, HELEN M; MAGUIRE, LYNN A; COLYVAN, MARK; JUSTUS, JAMES; MARTIN, TARA G; ROTHLEY, KRIS

    2014-01-01

    Voting systems aggregate preferences efficiently and are often used for deciding conservation priorities. Desirable characteristics of voting systems include transitivity, completeness, and Pareto optimality, among others. Voting systems that are common and potentially useful for environmental decision making include simple majority, approval, and preferential voting. Unfortunately, no voting system can guarantee an outcome, while also satisfying a range of very reasonable performance criteria. Furthermore, voting methods may be manipulated by decision makers and strategic voters if they have knowledge of the voting patterns and alliances of others in the voting populations. The difficult properties of voting systems arise in routine decision making when there are multiple criteria and management alternatives. Because each method has flaws, we do not endorse one method. Instead, we urge organizers to be transparent about the properties of proposed voting systems and to offer participants the opportunity to approve the voting system as part of the ground rules for operation of a group. Sistemas de Votación para Decisiones Ambientales Resumen Los sistemas de votación agregan preferencias eficientemente y muy seguido se usan para decidir prioridades de conservación. Las características deseables de un sistema de votación incluyen la transitividad, lo completo que sean y la optimalidad de Pareto, entre otras. Los sistemas de votación que son comunes y potencialmente útiles para la toma de decisiones ambientales incluyen simple mayoría, aprobación y votación preferencial. Desafortunadamente, ningún sistema de votación puede garantizar un resultado y a la vez satisfacer un rango de criterios de desempeño muy razonable. Además, los métodos de votación pueden manipularse por los que toman las decisiones y votantes estratégicos si tienen el conocimiento de los patrones de votación y de las alianzas entre miembros dentro de las poblaciones votantes. Las

  5. Bref incident résolu inexpliqué

    PubMed Central

    Arane, Karen; Claudius, Ilene; Goldman, Ran D.

    2017-01-01

    Résumé Question Pendant de nombreuses années, l’acronyme ALTE (apparent life-threatening event ou malaise grave du nourrisson) était associé au syndrome de mort subite du nourrisson. Les parents qui décrivaient un malaise aigu chez leur nourrisson étaient envoyés à l’hôpital pour le faire admettre. J’ai appris qu’une nouvelle terminologie est recommandée pour les nourrissons. Quelle est l’approche actuelle pour une expérience proche de la mort chez un nourrisson? Réponse Dans un guide de pratique clinique récent, on a révisé le nom d’un ALTE pour le remplacer par BRUE (brief resolved unexplained event ou bref incident résolu inexpliqué), de même que sa définition. Un diagnostic de BRUE chez les nourrissons de moins de 1 an est posé lorsque l’enfant présente 1 des symptômes suivants du BRUE : un bref épisode (c.-à-d. moins de 1 minute et habituellement de 20 à 30 secondes) qui s’est complètement réglé (l’état du nourrisson est revenu à la normale), qui demeure inexpliqué après l’anamnèse et l’examen physique, et peut comporter un incident caractérisé par une cyanose ou une pâleur; une respiration absente, diminuée ou irrégulière; une hypertonie ou une hypotonie; ou une réceptivité altérée. Les nourrissons à faible risque ne devraient pas être hospitalisés et les tests excessifs sont découragés. PMID:28115453

  6. Remedial investigation work plan for Bear Creek Valley Operable Unit 1 (S-3 Ponds, Boneyard/Burnyard, Oil Landfarm, Sanitary Landfill 1, and the Burial Grounds, including Oil Retention Ponds 1 and 2) at the Oak Ridge Y-12 Plant, Oak Ridge, Tennessee. Volume 1, Main text

    SciTech Connect

    Not Available

    1993-09-01

    The intent and scope of the work plan are to assemble all data necessary to facilitate selection of remediation alternatives for the sites in Bear Creek Valley Operable Unit 1 (BCV OU 1) such that the risk to human health and the environment is reduced to acceptable levels based on agreements with regulators. The ultimate goal is to develop a final Record Of Decision (ROD) for all of the OUs in BCV, including the integrator OU. However, the initial aim of the source OUs is to develop a ROD for interim measures. For source OUs such as BCV OU 1, data acquisition will not be carried out in a single event, but will be carried out in three stages that accommodate the schedule for developing a ROD for interim measures and the final site-wide ROD. The three stages are as follows: Stage 1, Assemble sufficient data to support decisions such as the need for removal actions, whether to continue with the remedial investigation (RI) process, or whether no further action is required. If the decision is made to continue the RI/FS process, then: Stage 2, Assemble sufficient data to allow for a ROD for interim measures that reduce risks to the human health and the environment. Stage 3, Provide input from the source OU that allows a final ROD to be issued for all OUs in the BCV hydrologic regime. One goal of the RI work plan will be to ensure that sampling operations required for the initial stage are not repeated at later stages. The overall goals of this RI are to define the nature and extent of contamination so that the impact of leachate, surface water runoff, and sediment from the OU I sites on the integrator OU can be evaluated, the risk to human health and the environment can be defined, and the general physical characteristics of the subsurface can be determined such that remedial alternatives can be screened.

  7. Human and Murine Tissue-Engineered Colon Exhibit Diverse Neuronal Subtypes and Can Be Populated by Enteric Nervous System Progenitor Cells When Donor Colon Is Aganglionic

    PubMed Central

    Wieck, Minna M.; El-Nachef, Wael N.; Hou, Xiaogang; Spurrier, Ryan G.; Holoyda, Kathleen A.; Schall, Kathy A.; Mojica, Salvador Garcia; Collins, Malie K.; Trecartin, Andrew; Cheng, Zhi; Frykman, Philip K.

    2016-01-01

    Purpose: Tissue-engineered colon (TEC) might potentially replace absent or injured large intestine, but the enteric nervous system (ENS), a key component, has not been investigated. In various enteric neuropathic diseases in which the TEC is derived from aganglionic donor colon, the resulting construct might also be aganglionic, limiting tissue engineering applications in conditions such as Hirschsprung disease (HD). We hypothesized that TEC might contain a diverse population of enteric neuronal subtypes, and that aganglionic TEC can be populated by neurons and glia when supplemented with ENS progenitor cells in the form of neurospheres. Materials and Methods: Human and murine organoid units (OU) and multicellular clusters containing epithelium and mesenchyme were isolated from both mouse and human donor tissues, including from normally innervated and aganglionic colon. The OU were seeded onto a biodegradable scaffold and implanted within a host mouse, resulting in the growth of TEC. Aganglionic murine and human OU were supplemented with cultured neurospheres to populate the absent ENS not provided by the OU to rescue the HD phenotype. Results: TEC demonstrated abundant smooth muscle and clusters of neurons and glia beneath the epithelium and deeper within the mesenchyme. Motor and afferent neuronal subtypes were identified in TEC. Aganglionic OU formed TEC with absent neural elements, but neurons and glia were abundant when aganglionic OU were supplemented with ENS progenitor cells. Conclusion: Murine and human TEC contain key components of the ENS that were not previously identified, including glia, neurons, and fundamental neuronal subtypes. TEC derived from aganglionic colon can be populated with neurons and glia when supplemented with neurospheres. Combining tissue engineering and cellular replacement therapies represents a new strategy for treating enteric neuropathies, particularly HD. PMID:26414777

  8. Awareness of Emerging Wireless Technologies: Ad-hoc and Personal Area Networks Standards and Emerging Technologies (Sensibilisation a l’emergence des technologies sans fil: technologies emergeantes et normes de reseaux personnels et ad-hoc)

    DTIC Science & Technology

    2007-04-01

    Projet Hipercom – INRIA Rocquencourt. [14] Performance analysis of OLSR Multipoint Relay flooding in two ad hoc wireless network models N°4260...comporter la dénomination « RTO » ou « AGARD » selon le cas, suivi du numéro de série. Des informations analogues, telles que le titre est la date de...RTO » ou « AGARD » selon le cas, suivie du numéro de série (par exemple AGARD-AG-315). Des informations analogues, telles que le titre et la date

  9. YBCO Microbolometers for Infrared Detection: Enhancement of Performances with Regionally Thinned Microbridges

    DTIC Science & Technology

    2009-06-01

    infrarouge entraîne un changement de résistance électrique du matériau actif. Ce changement de résistance est suivi en appliquant un courant constant et...9a. NUMÉRO DU PROJET OU DE LA SUBVENTION (Spécifier si c’est un projet ou une subvention) 9b. NUMÉRO DE CONTRAT 10a...cote de sécurité. Des renseignements tels que le modèle de l’équipement, la marque de fabrique, le nom de code du projet militaire, la situation

  10. DETAILED ANALYSIS OF THE MOST PROMISING ALTERNATIVES TO USING GRANULAR ACTIVATED CARBON TO TREAT 200-ZP-1 GROUNDWATER AND 200-PW-1 SOIL VAPOR

    SciTech Connect

    BYRNES ME, KALMAR JA

    2007-11-26

    This document presents a detailed evaluation of selected alternative treatment options to granular activated carbon (GAC) for removing carbon tetrachloride generated from the groundwater pump-and-treat system at the 200-ZP-I Operable Unit (OU) in the 200 West Area of the Hanford Site. This evaluation of alternative treatment options to GAC is also applicable to the vadose zone soil vapor extraction (SVE) system at the 200-PW-l OU, which is also located in the Hanford Site's 200 West Area.

  11. Influence de l'état physique sur l'ionisation gamma de lipides d'uf

    NASA Astrophysics Data System (ADS)

    Ben Miled Lassoued, M.; Raffi, J.; Sonaglia, I. Pouliquen; Prost, M.; Lesgards, G.

    1999-01-01

    Egg lipid irradiation, in solid or liquid state, does not change the nature of radioinduced hydrocarbons but only they quantities. Moreover the ratio between yields in solid and in liquid state is independent from the hydrocarbon. L'irradiation de lipides d'uf à l'état solide ou liquide ne change pas la nature des hydrocarbures radioformés mais seulement leur quantités. Cependant le rapport entre les rendements de formation à l'état solide ou liquide ne dépend pas de l'hydrocarbure.

  12. A Simple Expression for the Matrix Gradient of a Diagonal Element of R in QR Decomposition for Use in MIMO Communications and Signal Processing

    DTIC Science & Technology

    2010-12-01

    est bien connu que n’importe quelle matrice A peut être décomposée, ou factorisée, puisque A = QR où Q est une matrice à colonnes ortho- normales...signal plus bruit A, il est intéressant de connaı̂tre les effets du bruit surQ etR . À cette fin, les gradients des élémentsQ etR par rapport àA

  13. Modification of the Gerin Falling Ball Viscosity Comparator Model V3 for Use at the Standard Test Temperature of 100 deg C

    DTIC Science & Technology

    1989-03-01

    version modifi6e du viscosimetre comparateur a bille peut mesurer un chanSement en pourcentage de viscosit6 d’une huile de graissage pour diesels MIL-L...900OG us6e par rapport a la mime huile neuve, sans 6gard au lot ou au fabricant. Ce changement de viscosit6 peut &tre utilis6e I bord d’un navire pour...indiquer si une huile de graissage pour diesels eat encore ou n’est plus utilisable. La version modifi6e du viscosimetre comparateur a bill. permet de

  14. Nuclear Forensic Field Exercise #1

    DTIC Science & Technology

    2006-11-01

    travaillent dans un environnement contaminé par une substance radioactive. Ainsi, un exercice radiologique pratique a été organisé dans le but d’examiner...Ottawa; novembre 2006. Introduction ou contexte Un exercice radiologique pratique a été organisé à l’appui du projet 04-0030TD de l’IRTC. Les...capacité d’effectuer des analyses radiologiques est jugé comme un atout. Importance Il est essentiel de trouver une installation (ou des installations

  15. In-Plume Emission Test Stand 2: Emission Factors for 10- to 100-kW U.S. Military Generators

    DTIC Science & Technology

    2009-12-01

    Dust - Trak Model 8520 light scattering...gi st ra tio n (C CR Ti tle 13 , Di vi si on 3, Ch . 5, Ar t. 2) AS TM D2 50 0 Cl ou d po in t o C 11 12 56 56 Cl ou d po in t o F 12 .2 10 .4...05 2 (IP 36 5) AP Ig ra vi ty 15 .5 6 °C , 60 ° F o A PI 35 .0 35 .3 41 .0 41 .2 37 x 51 33 < x < 39 AS TM D8 6 In iti al bo ili ng po in t o F 37

  16. In situ relationship between energy reserves and steroid hormone levels in Nereis diversicolor (O.F. Müller) from clean and contaminated sites.

    PubMed

    Mouneyrac, C; Pellerin, J; Moukrim, A; Ait Alla, A; Durou, C; Viault, N

    2006-10-01

    The aim of this study was to investigate, in situ, the temporal effects of urban effluent discharge on energy reserves and steroid hormone levels in the intrasedimentary worm Nereis diversicolor. Results have shown no differences in energy reserves (glycogen, lipids) in organisms originating from a contaminated site (Oued Souss) and a comparatively clean site (Oualidia). Both sites are located on the Moroccan Atlantic coast. In contrast, steroid hormone (progesterone, testosterone, and 17beta-estradiol) levels were significantly decreased in animals from Oued Souss. The differences in the responses suggest that organisms from the polluted site have been exposed to endocrine disruptors.

  17. Canada-wide effect of regulatory warnings on antidepressant prescribing and suicide rates in boys and girls.

    PubMed

    Rhodes, Anne E; Skinner, Robin; McFaull, Steven; Katz, Laurence Y

    2013-11-01

    Objectif : Examiner l’effet des mises en garde de Santé Canada concernant la prescription d’antidépresseurs (AD) et les taux de suicide des filles et garçons de moins de 18 ans et de 18 à 19 ans au Canada entre 2004 et 2009. Nous avons émis l’hypothèse qu’une augmentation des taux de suicide serait propre aux filles, reflétant des taux de prescription d’AD plus élevés chez les filles que chez les garçons. Méthode : Nous avons établi des graphiques et testé la différence entre les taux de suicide pancanadiens avant et après les périodes de mise en garde réglementaires (soit de 1995 à 2006 ou de 1995 à 2009) chez les filles et garçons de moins de 18 ans ou de 18 à 19 ans. Pour comparer avec les études précédentes, nous avons estimé les rapports de cotes et les intervalles de confiance à 95 % à l’aide de la régression de Poisson ou de la régression négative binomiale. Résultats : Il n’y avait pas d’augmentation statistiquement significative des taux de suicide chez les filles de moins de 18 ans, ou de 18 à 19 ans, en réponse aux mises en garde réglementaires contre les AD. Chez les garçons de moins de 18 ans ou de 18 à 19 ans, les taux de suicide ont diminué après 2003. Conclusions : Nous n’avons pas observé de taux de suicide accrus après les mises en garde réglementaires contre les AD chez les filles ou les garçons de moins de 18 ans ou de 18 à 19 ans dans les taux pancanadiens. Cependant, cela n’élimine pas la possibilité qu’un tel effet se soit produit dans certaines administrations chez les filles et (ou) que les mises en garde réglementaires aient nui à la tendance à la baisse des taux de suicide. Les facteurs influençant la tendance à la baisse chez les garçons méritent d’être davantage étudiés.

  18. Toxoplasmose oculaire atypique chez une femme congolaise de 72 ans: à propos d'une observation

    PubMed Central

    Bienvenu, Yogolelo Asani; Angel, Musau Nkola; Eric, Kasamba Ilunga; Socrate, Kapalu Mwangala; Sebastien, Mbuyi Musanzayi; Philippe, Cilundika Mulenga; Leon, Kabamba Ngombe; Bruno, Iye Ombamba Kayimba; Gaby, Chenge Borasisi

    2015-01-01

    Les auteurs rapportent un cas de toxoplasmose oculaire binoculaire, rarement décrit dans la littérature, chez une personne âgée de 72 ans, de sexe féminin, à laquelle s'associe une rétinite pigmentaire unilatérale. Cette observation permet d'attirer l'attention de la communauté scientifique sur les autres formes ou variétés de présentation moins courantes, « atypiques », pouvant être rencontrées ou associées à la toxoplasmose oculaire. PMID:26958130

  19. Materials Research for Superconducting Machinery-IV

    DTIC Science & Technology

    1975-09-01

    0.187 5 1.495 5 0.188 42 63 j TABLE 31. THERMAL EXPANSION BEHAVIOR OF ROWLAND POLY- SULFONE IN THE LONGITUDINAL AND TRANSVERSE DIRECTION...Miscellaneous Composites GlassPnlyimide o,u (24, 67, 68), ofu(89), o^m.l.Bg). At/i(67) Glass- Melamine otu(65). 6* (65). X(90) Glass-Viton olu{68...Glass-Phenyl Formaldehyde o’d 10), X (72), Cp (72) SiOi-Epoxy o,u(31), AL/L »28) Gra(J)it^-Aluminiun a,u (thermal cyclinQ effects 6-6.2

  20. La pneumatose kystique intestinale secondaire à un ulcère peptique : à propos de trois cas

    PubMed Central

    Hassani, Karim Ibn Majdoub; Yazough, Issam; Laalim, Said Ait; Toughrai, Imane; Mazaz, Khalid

    2015-01-01

    La pneumatose kystique intestinale (PNK) est une pathologie rare qui se caractérise par la présence de kystes gazeux dans la paroi intestinale. Elle est asymptomatique ou pauci symptomatique, et le plus souvent découverte lors d'un examen d'imagerie ou d'endoscopie. Nous rapportons une série de trois cas de pneumatose kystique secondaire à un ulcère peptique. A travers ce travail nous essayons de mettre la lumière sur les différents aspects cliniques, radiologiques et thérapeutiques de cette pathologie. PMID:27386026

  1. Official Guard and Reserve Manpower Strengths and Statistics. FY 2000 Summary

    DTIC Science & Technology

    2000-01-01

    tOU cc z...ex r-<UJ ZS r- UJ z £ UJ UJ r- tou ex z < LU < o. u. h- Ul LU < Q Q Q Q Z Pt < < 3 z Q Q o H SrJ 00 (- L3 L3 o;< LU U 00 l/l U 3...fNincoryai i/im^ rsi HO ID OOrHlD lit mmio oo rHmrN, IN. •<J-< DrH MIT OU1H IDm ID oo in a* mry r%. (VlrHTj- Ory

  2. Superfund Record of Decision (EPA Region 7): Des Moines TCE Site, Operable Unit 3, Des Moines, IA. (Second remedial action), September 1992. Final report

    SciTech Connect

    Not Available

    1992-09-18

    The Des Moines TCE site is located southwest of downtown Des Moines, Polk County, Iowa. Land use in the area is predominantly industrial and commercial, and part of the site lies within the floodplain of the Raccoon River. Water from the Des Moines Water Works north infiltration gallery was found to be contaminated with trichloroethylene (TCE), dichloroethylene (DCE), and vinyl chloride at levels above accepted drinking water standards. The ROD addresses OU3, which encompasses potential sources of ground water contamination in an area north of the Raccoon River. The selected remedial action for OU3 includes no action with periodic groundwater monitoring.

  3. Kelp and Eelgrass in Puget Sound

    DTIC Science & Technology

    2007-05-01

    elt er ed to m od er at ely ex po se d ha bi ta ts. Pr os tra te D ict yo ne ur um D . c al ifo rn icu m R up re ch t...at ely sh elt er ed to m od er at ely ex po se d ha bi ta ts. Pr os tra te D ict yo ne ur um D . c al ifo rn icu m R up re ch t. St ra its *U...L in na eu s) La m ou ro ux 1 G re at B en d ar ea , s ou th

  4. Risk factors for falls in older adults with lower extremity arthritis: a conceptual framework of current knowledge and future directions.

    PubMed

    Arnold, Cathy M; Gyurcsik, Nancy C

    2012-01-01

    Objectif : Le nombre de Canadiens de 65 ans et plus augmentera au cours des 20 prochaines années et la prévalence des maladies chroniques, dont l'arthrite, sera en hausse, tout comme le nombre de chutes. Bien que des facteurs de risques de chute connus soient associés à l'arthrose du genou ou de la hanche, une somme minimale de recherches a évalué les risques ou les taux de chutes et de fractures chez ce segment de la population. En conséquence, l'objectif de cette étude était de dresser un résumé des recherches réalisées sur les risques de chute ou de fracture chez les adultes plus âgés aux prises avec de l'arthrose au genou ou à la hanche, et d'élaborer un cadre conceptuel pour le dépistage et l'évaluation des risques de chute. Méthode : La Classification internationale du fonctionnement, du handicap et de la santé (CIF), qui forme les directives cliniques pour le dépistage des risques de chute, et une revue documentaire sélective ont été utilisées. Résultats : Il existe des lacunes dans nos connaissances relatives aux risques de chute et de fracture au sein de ce segment de la population. La dégradation de la performance musculaire, de l'équilibre et de la mobilité a été établie, mais on sait peu de choses en ce qui a trait aux répercussions possibles de facteurs contextuels personnels ou environnementaux sur les risques de chute ou de fracture. L'activité physique peut aider à prévenir les chutes, mais la non-adhésion des patients à un programme d'activité physique pose problème. Conclusion : Une évaluation des risques de chute chez les adultes plus âgés souffrant d'arthrose du genou ou de la hanche est nécessaire. La promotion de l'activité physique régulière, en se concentrant sur les facteurs contextuels personnels propres à la maladie ou à l'activité, pourrait aider directement la planification du traitement.

  5. Controlling the interference of single photons emitted by independent atomic sources

    NASA Astrophysics Data System (ADS)

    Cerè, Alessandro; Leong, Victor; Kosen, Sandoko; Srivathsan, Bharath; Gulati, Gurpreet K.; Kurtsiefer, Christian

    2015-09-01

    Hong-Ou-Mandel interference between independent sources is a fundamental primitive of many quantum communication and computation protocols. We present a study of the Hong-Ou-Mandel interference of single photons generated via two different physical processes by two independent atomic systems: scattering by a single atom, and parametric generation via four-wave mixing in a cloud of cold atoms. By controlling the coherence time and central frequency of the heralded single photons generated by four-wave mixing we observe quantum beat and a varying degree of interference.

  6. Le gingembre contre la nausée et les vomissements de la grossesse

    PubMed Central

    Lindblad, Adrienne J.; Koppula, Sudha

    2016-01-01

    Question clinique Le gingembre peut-il traiter la nausée et les vomissements de la grossesse? Résultats Durant le premier trimestre, le gingembre soulagerait la nausée et les vomissements de quelque 4 points sur une échelle de 40 points, ou éliminerait les vomissements chez 1 femme sur 3 au jour 6. L’étude la plus vaste ne laisse croire à aucune hausse des malformations congénitales ou de la mortinatalité, mais les études de moins grande envergure laissent croire le contraire.

  7. Italy’s All-Volunteer Army: An Analytical Framework for Understanding the Key Policy Issues and Choices During the Transition

    DTIC Science & Technology

    2002-01-01

    contribution (importo aggiuntivo pensionabile mensile, or IAPM), and an operational allowance (indennita’ impiego operativo , or 110) .62 Basic pay...1483-ARPA, 1974. Nones, Michele, L’efficienza del Sistema Difesa, Rome, Italy: Documenti IAI, 1996. O’Keefe, Mary, W. Kip Viscusi, and Richard J

  8. Base Lunar Alpha

    NASA Video Gallery

    Tu misión: Recuperar los sistemas críticos cuando un meteoro daña los equipos de supervivencia de tu ambiente lunar. Parece una película de ciencia ficción, ¿verdad? En realidad, es el nuevo juego ...

  9. Ada Compiler Validation Summary Report: Certificate Number: 920509S1. 11259 Alenia Aeritalia and Selenia S.p.A DACS VAX/VMS to 80x86 PM MARA Ada Cross Compiler, Version 4.6 Microvax 4000/200 => MARA

    DTIC Science & Technology

    1992-01-01

    INTERFACE exc. non ADA ------- v codice ADA exception ADA AH A AI .1 I sistema operativo exc. non ADA ------- - fig. 1- Function Exception Handling is...identification of page terminator can be penalized when teletype characterization is used to handle serial communication lines connected to host computers. In

  10. Spleen and Lymphatic System

    MedlinePlus

    ... A Week of Healthy Breakfasts Shyness Spleen and Lymphatic System KidsHealth > For Teens > Spleen and Lymphatic System A A A What's in this article? Why ... español El bazo y el sistema linfático The lymphatic system is an extensive drainage network that helps keep ...

  11. Research Techniques in Wave Propagation and Scattering. Program and Abstracts of Workshop/Symposium held at the Ohio State University on 18-21 October 1982.

    DTIC Science & Technology

    1982-01-01

    EXPANSIONS APPLIED TO -. DIFFRACTION OF ELASTIC WAVES S.K. Vatta, Univeu,,a o6 Colouado F.J. Sabina, In6titto de Inve.tigacione. en Matematica ., Mexico 10:20...Colorado Boulder, CO 80309 F.J. Sabina Instituto de Investigaciones en Matematicas Aplicadas y en Sistemas 04510 Mexico, D.F. Diffraction of elastic

  12. Asteroides

    NASA Video Gallery

    Los asteroides son más que una roca metálica que orbita alrededor del sol. Al igual que la Tierra, es posible que Ceres, el asteroide más grande del sistema solar, tenga casquetes polares. Únete a ...

  13. Energia Renovable para Centros de Salud Rurales (Renewable Energy for Rural Health Clinics)

    SciTech Connect

    Jimenez, T.; Olson, K.

    1999-07-28

    Esta es la primera de una serie de guias de aplicaciones que el Programa de Energia de Villas de NREL esta comisionando para acoplar sistemas comerciales renovables con aplicaciones rurales, incluyendo agua, escuelas rurales y micro empresas. La guia esta complementada por las actividades de desarrollo del Programa de Energia de Villas de NREL, proyectos pilotos internacionales y programas de visitas profesionales.

  14. JPRS Report Soviet Union USA: Economics, Politics, Ideology No 12, December 1987.

    DTIC Science & Technology

    2007-11-02

    no question, however, that one day there will be no more oil. The main renewable sources of energy ( solar and thermonuclear) are still dreams for...A.F.), No 11 Herken, Gregg, "Counsels of War" (Kobrinskaya, I.Ya.), No 3 "Shirokomasshtabnaya protivoraketnaya sistema i mezhdunarodnaya

  15. A New United Nations for a New Era: Security, Development, and the ’Regional Solution’ (The Case of Latin America)

    DTIC Science & Technology

    2009-12-01

    feasible. In the mean time or if a developed nation preferred another avenue other power production could be invested in (wind, solar , hydroelectric...of the South American peoples. SICA - Sistema de Integracion Centroamericana, or Central American Integration System (Est. 1991) The Central

  16. The SOAR Telescope Project Southern Observatory for Astronomical Research (SOAR)

    DTIC Science & Technology

    2003-03-21

    completed SOAR dome and facility. 2. Dome The preliminary design of the dome was handled by M3 (US). A Brazilian firm, Equatorial Sistemas led the...for the Gemini Telescope during construction, now Project Manager at the National Solar Observatory • Robert Shelton, Provost of the University on

  17. JPRS Report, Soviet Union, USA: Economics, Politics, Ideology, No. 12, December 1987.

    DTIC Science & Technology

    2007-11-02

    main renewable sources of energy ( solar and thermonuclear) are still dreams for some indefinite time in the distant future. We will be very lucky...I.Ya.), No 3 "Shirokomasshtabnaya protivoraketnaya sistema i mezhdunarodnaya bezopasnost" [The Broad-Scale Anti- missile System and International

  18. The Voroshilov Lectures. Materials from the Soviet General Staff Academy, Volume 2: Issues of Soviet Military Strategy

    DTIC Science & Technology

    1990-12-01

    wide dimensions, deep vacuums, special temperature 100 The Voroshilov Lectures conditions, special effects of solar radiation in all spectra, the...command post. The operation is supported by a signal center and supporting elements. KOSMICHESKAIA SISTEMA Space system: A grouping of space and ground

  19. Two Decades of SIMCE: An Overview of the National Assessment System in Chile

    ERIC Educational Resources Information Center

    Meckes, Lorena; Carrasco, Rafael

    2010-01-01

    The Chilean national learning outcome assessment system (Sistema de Medicion de Calidad de la Educacion, SIMCE) has carried out census-based assessments since 1988 and publishes the results at both the national and school levels. During its 20 years of existence, SIMCE has experienced changes in its institutional framework, objectives,…

  20. Frank Middelburg (1936-1985)

    NASA Astrophysics Data System (ADS)

    Ardeberg, A.

    1985-12-01

    La noticia de la desaparicion de Frank Middelburg, en el dia 15 de Noviembre de 1985, conmovio a tode el mundo astronomico con un sentimiento especial de tristeza. Frank no solo era un experto reconocido en el campo de procesamiento de imagen y un ingeniero de sistemas altamente respetado, tambien era un preciado amigo y colega.