Sample records for sobre suelos cambisoles

  1. EFECTO DE LA LABRANZA SOBRE LAS PROPIEDADES FÍSICAS DEL SUELO Y EL RENDIMIENTO DEL FRIJOL (Vigna unguiculata L. Walp) EN EL YARACUY MEDIO

    Microsoft Academic Search

    Carlos Ohep; Felipe Marcano; Orlando Sivira

    RESUMEN Para evaluar los efectos que ocasionan diferentes métodos de labranza (no labranza, subsolado sin rastra, subsolado con rastra y rastra solamente) sobre algunas propiedades físicas del suelo (densidad aparente, porosidad y resistencia a la penetración) y el desarrollo del cultivo del frijol (peso seco, densidad radical y rendimiento), se condujo un experimento bajo un diseño en bloques al azar

  2. Vertical distribution of chloroform-extractable green fraction in several Andosol and Cambisol profiles

    Microsoft Academic Search

    Takayuki Kobayashi; Makiko Watanabe; Hiroyuki Ohta; Nobuhide Fujitake

    2006-01-01

    The vertical distribution of the content of the chloroform-extractable green fraction (CEGF) in the soil profiles of four Japanese Andosols, one Japanese Cambisol and one Nepalese Cambisol was examined using a colorimetric method with an ultraviolet and visible spectrophotometer. In addition, the relationship between the CEGF content and the soil chemical properties was examined by statistical analysis. CEGF was detected

  3. Contrasting agronomic response of biochar amendment to a Mediterranean Cambisol: Incubation vs. field experiment

    NASA Astrophysics Data System (ADS)

    De la Rosa, José M.; Paneque, Marina; De Celis, Reyes; Miller, Ana Z.; Knicker, Heike

    2015-04-01

    The application of biochar to soil is being proposed as a novel approach to establish a significant long-term sink for atmospheric carbon dioxide in terrestrial ecosystems. In addition, biochars offer a simple, sustainable tool for managing organic wastes and to produce added value products. Numerous research studies pointed out that biochar can act as a soil conditioner enhancing plant growth by supplying and, more importantly, retaining nutrients and by providing other services such as improving soil physical and biological properties [1]. However, the effectiveness of biochar in enhancing plant fertility is a function of soil type, climate, and type of crop [2] but also of the biochar properties. The inherent variability of biochars due to different feedstock and production conditions implies a high variability of their effect on soil properties and productivity. Furthermore, due to the irreversibility of biochar application, it is necessary to perform detailed studies to achieve a high level of certainty that adding biochar to agricultural soils, for whatever reason, will not negatively affect soil health and productivity. The major goals of this research were: i) understanding how the properties of 5 different biochars produced by using different feedstock and pyrolysis conditions are related to their agronomic response, and ii) assessing the agronomic effect of biochar amendment under field conditions of a typical Mediterranean non-irrigated plantation. Four of the used biochars were produced by pyrolysis from wood (2), paper sludge (1) and sewage sludge (1), at temperatures up to 620 °C. The fifth biochar was produced from old grapevine wood by applying the traditional kiln method. Biochars were analysed for elemental composition (C, H, N), pH, WHC and ash contents. The H/C and O/C atomic ratios suggested high aromaticity of all biochars, which was confirmed by 13C solid-state NMR spectroscopy. The FT-IR spectra indicated the presence of lignin residues in wood biochars. The FESEM-EDS distinguished compositional and structural differences of the studied biochars such as macropores on the surface of pyrolysis wood biochars. In the frame of a pot experiment, the biochar characteristics (physical properties and chemical composition) were related to the germination rates and to the plant biomass production of a Lolium perenne. Incubation was carried out in 300 mL pots during 79 days in which a calcic Cambisol [3] was amended with 10, 20 and 40 t ha-1 biochar. After adjusting the soil humidity to 60% of the maximum water holding capacity (WHC), the pots were placed into a greenhouse under similar conditions than those reported by [4]. Biochar amendment improved significantly germination rates and soil fertility (excepting kiln wood biochar), and had no negative pH impact on the already alkaline soil. Application of sewage sludge biochar, the richest in minerals and nitrogen, resulted in the highest soil fertility. In this case, increase of the dose went along with an enhancement of plant production. Considering further costs due to production and transport of biochar, the application of 10 t ha-1 turned out as the most efficient for the crop and soil used in the incubation experiment [further details in 5]. The field study was performed with seeds of Helianthus annuus, at the experimental station "La Hampa", located in the Guadalquivir river valley (SW Spain; 37° 21.32' N, 6° 4.07' W), Seville. The calcic Cambisol which was also used as matrix for the pot experiments was amended with doses equivalent to 0 (control), 1.5 and 15 t ha-1 of the five biochars, making a total of 12 different treatments. Soil properties and composition were monitored during the growing time including elemental composition, pH, water holding capacity and soil microbial biomass. After 6 months of growth, sunflower plants were harvested. Plant height, chlorophyll content and sunflower seeds production were recorded. Results of this field experiment are still being processed. Nevertheless, preliminary results indicated that addition

  4. Emergence of irrigated cotton in flatland planting in relation to furrow opener type and crust-breaking treatments for Cambisols in central Iran

    Microsoft Academic Search

    Abbas Hemmat; A. A Khashoei

    2003-01-01

    Emergence of cotton (Gossypium hirsutum L.) under flatland mechanized planting system with crust-forming soil and saline soil and irrigation water can be suboptimal in central Iran. A field experiment was conducted to determine furrow opener type and crust-breaking method effects on cotton emergence on a silty clay soil (Calcic Cambisols). The effects of five planters (equipped with runner, single- and

  5. Determinacion de periodos fundamentales del suelo mediante vibraciones ambientales en el municipio de Humacao, Puerto Rico

    NASA Astrophysics Data System (ADS)

    Cintron Aponte, Rommel

    La tecnica de Nakamura ha sido utilizada a nivel mundial para determinar periodos fundamentales del suelo. La tecnica consiste en calcular y graficar cocientes espectrales H/V de vibraciones ambientales registradas sobre el suelo. Mediciones de vibraciones ambientales fueron tomadas en 151 lugares dentro del municipio de Humacao, localizado al este de Puerto Rico. Los datos se procesaron utilizando espectros de Fourier y espectros de potencia. La tecnica fue validada al compararla con los resultados de cocientes espectrales H/V de registros de sismos debiles y tambien con una modelacion numerica realizada con datos de un ensayo "downhole". Las graficas de los cocientes espectrales H/V fueron divididas en casos y grupos, los cuales dependen de la facilidad para identificar el periodo fundamental pico y amplitudes en frecuencias menores de 1 Hz, respectivamente. Los resultados obtenidos con ambos espectros fueron comparados y se concluye que los mismos se complementan para proveer resultados mas confiables. Se crearon mapas de periodos fundamentales, factores de amplitud, isoperiodos y clasificacion sismica de sitio. Los mapas de isoperiodos fueron realizados en las zonas mas pobladas sobre depositos de suelo. El mapa de periodos fundamentales del suelo mostro buena correlacion con la geologia local. El mapa de clasificacion sismica derivado de periodos de sitio fue comparado con el mapa de clasificacion sismica derivado de barrenos geotecnicos. El mapa de clasificacion obtenido de periodos puede sobreestimar un poco algunas clasificaciones del suelo. Sin embargo, este mapa puede proveer un estimado aproximado de la velocidad de onda de corte promedio del suelo hasta una profundidad de 100 pies (30 metros).

  6. Suelos, Sal y OsmosisSuelos, Sal y Osmosis Maarten W. Saaltink

    E-print Network

    Politècnica de Catalunya, Universitat

    Suelos, Sal y OsmosisSuelos, Sal y Osmosis Maarten W. Saaltink Alejandro Blanco Jesús Carrera Toni. sal (kg mol-3) #12;Curva de retención y osmosis q ¿Usar Pmat o Pmat - Posm? qEn teoría osmosis apenas afecta fuerzas capilares q¿Cómo osmosis afecta fuerzas de adsorción? q Hay que medir ( ) min 1 1 0 minmax

  7. Impact of charcoal waste application on the soil organic matter content and composition of an Haplic Cambisol from South Brazil

    NASA Astrophysics Data System (ADS)

    dos Anjos Leal, Otávio; Pinheiro Dick, Deborah; Cylene Lombardi, Kátia; Gonçalves Maciel, Vanessa

    2014-05-01

    In some regions in Brazil, charcoal is usually applied to the soil with the purpose to improve its fertility and its organic carbon (SOC) content. In Brazil, the use of charcoal waste from steel industry with agronomic purposes represents also an alternative and sustainable fate for this material. In this context, the objective of this work was to evaluate the impact of Eucalyptus charcoal waste application on the SOC content and on the soil organic matter (SOM) composition. Increasing doses of charcoal (0, 10, 20 and 40 Mg ha-1) were applied to an Haplic Cambisol, in Irati, South-Brazil. Charcoal was initially applied on the soil surface, and then it was incorporated at 10 cm with a harrow. Soil undisturbed and disturbed samples (four replicates) were collected in September 2011 (1 y and 9 months) after charcoal incorporation. Four soil depths were evaluated (0-5, 5-10, 10-20 and 20-30 cm) and each replicate was composed by three subsamples collected within each plot. The soil samples were air dried, passed through a 9.51 mm sieve and thereafter through a 2.00 mm sieve. The SOC content and total N were quantified by dry combustion. The SOM was concentrated with fluoridric acid 10% and then the SOM composition was evaluated by thermogravimetric analysis along the soil profile. The main impact of charcoal application occurred at the 0-5 cm layer of the area treated with the highest dose: SOC content increased in 15.5 g kg-1 in comparison to the soil without charcoal application. The intermediary doses also increased the SOC content, but the differences were not significant. No differences for N content were found in this soil depth. Further results were observed in the 10-20 cm soil depth, where the highest dose increased the SOC content and N content. Furthermore, this treatment increased the recalcitrance of the SOM, mainly at the 0-5 cm and 10-20 cm soil layers. No differences between doses of charcoal application were found in the 20-30 cm soil depth, suggesting that the charcoal has not migrated so deep in soil even after almost two years of its incorporation.

  8. MINERALOGÍADE SUELOS DE LA SIERRA DE GUADARRAMA MADRID. ESPAÑA

    Microsoft Academic Search

    Hernando Massanet; Hernando Costa; Plaza Ramón

    The mineralogy of fine sand (light and heavy fractions) and clay fractions of different soils are studied. The soils are distric, eutric, umbric y mollic Leptosols; distric and eutric Cambisols; haplic Luvisols and haplic Phaeozems (FAO 1998) in the Guadarrama ridge (Morcuera, Navafría and Cerro de la Cruz-El Chaparral) developed from gland gneiss and under different vegetation: shrublands of Cytisus

  9. CARACTERIZACIÓN HIDRODINÁMICA DE LOS SUELOS DE MNASRA (MARRUECOS) MEDIANTE MEDIDAS INFILTROMÉTRICAS IN SITU

    Microsoft Academic Search

    Karim Tamoh; ABDELLATIF MASLOUHI; J. M. GUTIÉRREZ CARRERA

    2005-01-01

    RESUMEN. Para determinar las curvas características de los suelos de Mnasra (NO de Marruecos) se ha utilizado un método basado en la combinación de ensayos in situ de infiltrómetro de disco y un código de simulación del flujo de agua en el suelo. Los ensayos se han realizado muestreando el suelo después del experimento, lo que permite estimar los parámetros

  10. Effects of the distribution, amount, and size of beech fine roots on the C-turnover in the topsoil and subsoil of a sandy podzolic Cambisol

    NASA Astrophysics Data System (ADS)

    Vormstein, Svendja; Kaiser, Michael; Ludwig, Bernard

    2015-04-01

    The function of soil to act as a sink for CO2 is affected by the decomposition intensity of plant roots entering the mineral soil at different depths. Little is known about the key factors governing the mineralization kinetics of beech fine roots in different soil depths. We aimed to analyze the effects of the distribution, amount, and size of beech fine roots on their decomposition in the top- and subsoil. Topsoil (2 - 10 cm) and subsoil (145 - 152 cm) samples were taken from 3 profiles of a sandy Cambisol under beech located near Hannover (Germany). Incubation experiments were carried out for 300 days at 10°C and water contents at 50% of the water-holding capacity and CO2 emission rates were determined using an automated microcosm system. Treatments included control soils (either homogenized and sieved <2 mm or as intact soil column) and application of dried beech fine roots of different sizes (<2 mm and 1-2 cm) at different application rates (2 g kg-1 and 8 g kg-1) either homogenously mixed with homogenized soil or added in form of hot spots to the columns. First order models were applied to the cumulative C mineralization data. Calibration of a one-pool model was carried out for the C mineralization of the control topsoil. A two-pool model was calibrated to C mineralization data of the treatment with root application to subsoil at the rate of 2 g kg-1. Models were validated in the treatments using topsoil and root application at the rate of 2 g kg-1 (using the three pools obtained in the calibration) and at the rate of 8 g kg-1 (using the three pools obtained in the calibration and multiplying the maximum mineralizable root amounts by 4). The C mineralization data for the samples containing roots <2 mm, homogenously distributed at a concentration of 2 g per kg topsoil and subsoil and at a concentration of 8 g per kg subsoil were well described (calibration) or estimated (validation) indicating that root composition and amount were highly important for the C-turnover. The C mineralization rates measured for the samples containing the 1-2 cm roots and for those where the roots were added in hot spots were less satisfactorily estimated with the chosen model approach indicating pronounced effects of the root size and distribution on the mineralization kinetics. Especially for the subsoil samples with root concentrations of 8 g kg-1, the CO2 emission rates were distinctly larger for the samples that received the 1-2 cm roots compared to those containing the <2 mm roots. The differences between topsoils and subsoils in the CO2 emissions rates were lowest for the samples containing 2 g of <2 mm homogenously distributed roots per kg soil. The largest differences were detected for the samples where 8 g <2 mm roots per kg soil were distributed in hot spots. Our results indicate that size and distribution effects have to be taken into account for the elucidation of differences in the decomposition kinetics of roots between topsoil and subsoil.

  11. Investigación sobre la leucemia

    Cancer.gov

    Instantánea de la leucemia Información sobre las tendencias de incidencia, mortalidad y financiamiento del NCI sobre la leucemia; así como ejemplos de actividades del NCI y adelantos en la investigación de este tipo de cáncer.

  12. EFECTOS DE LA LABRANZA CONSERVACIONISTA EN LOS ATRIBUTOS FÍSICOS DEL SUELO QUE INFLUYEN SOBRE EL RENDIMIENTO DEL MAÍZ

    Microsoft Academic Search

    Carlos Ohep; Felipe Marcano; Spiridione Pudzzar; Carlos Colmenárez

    2002-01-01

    Effects of conservationist tillage on the physical attributes of soil that influence the yield of corn In order to study the effects of different conservationist tillage on the bulk density, capacity of air and hydraulic conductivity of the soil as well as the root density and yield of corn (Zea mays L.) in the production zone of Yaracuy state, an

  13. Inferencias sobre grafos

    Microsoft Academic Search

    Carlos N. Bouza; Sira M. Allende

    2002-01-01

    El estudio de un juego puede ser modelado asumiendo que solo algunas partidas son observadas. Entonces el árbol del juego debe ser estimado utilizando información muestral. Similarmente ocurre al obtener información sobre el comportamiento de las decisiones tomadas por individuos muestreados sobre un árbol de decisión teórico. Al considerar una medida de probabilidad que caracterice el comportamiento de redes aleatorias

  14. Investigación sobre los tumores cerebrales

    Cancer.gov

    Información sobre las tendencias de incidencia, mortalidad y financiamiento del NCI sobre los cánceres de cerebro y del sistema nervioso central; así como ejemplos de actividades del NCI y adelantos en la investigación de estos tipos de cáncer.

  15. EFECTO DEL TRÁFICO CONTROLADO SOBRE LA INFILTRACIÓN DEL AGUA Y LA EROSIÓN DEL SUELO EN UN SISTEMA DE CULTIVOS ANUALES EN LOMOS PERMANENTES EN EL SUR DE ESPAÑA

    Microsoft Academic Search

    H. Boulal; T. Alves Sobrinho; H. Gómez-Macpherson; J. A. Gómez

    This study was carried out in a commercial farm (Fuente Palmera, Córdoba) where direct sowing and controlled traffic had been practised during 4 years. The rotation cotton\\/maize is grown on permanent beds separated 0.95 m. A portable rainfall simulator was used to estimate the water infiltration rate, the runoff volume and the soil loss in furrows with and without wheels

  16. IX JORNADAS SOBRE DERECHO PENAL,

    E-print Network

    Escolano, Francisco

    IX JORNADAS SOBRE DERECHO PENAL, CRIMINOLOGÍAY DERECHO PENITENCIARIO 2 CRÉDITOS DE LIBRE ELECCIÓN CURRICULAR PRESENTACIÓN En la línea seguida en ediciones anteriores, las IX Jornadas de Derecho Penal, Criminología y Derecho Penitenciario pretenden ser un foro en el que se debatan cuestiones clave que

  17. Investigación sobre el cáncer de próstata

    Cancer.gov

    Información sobre las tendencias de incidencia, mortalidad y financiamiento del NCI sobre el cáncer de próstata; así como ejemplos de actividades del NCI y adelantos en la investigación de este tipo de cáncer.

  18. Poemes inèdits sobre Cèsar Borja

    Microsoft Academic Search

    Júlia Benavent

    2009-01-01

    Català:<\\/b> Descripció i extractes d'alguns poemes narratius italians impresos sobre Cèsar Borja, a partir d'un volum que havia pertangut a Hernando Colón (Sevilla, Biblioteca Colombina). \\u000aEnglish:<\\/b> Description and excerpts of several printed Italian narrative poems on Cesare Borgia contained in a volume that had belonged to Hernando Colon (Seville, Biblioteca Colombina). \\u000aItaliano:<\\/b> Descrizione ed estratti di alcuni poemi narrativi italiani

  19. Departamento de Matemticas Matemticas (CC. Qumicas) Ejercicios sobre derivacin: optimizacin

    E-print Network

    transporta paralela al suelo. 10. El propietario de un huerto de manzanas calcula que si siembra 24 árboles por acre, entonces cada árbos dará 600 manzanas por año. Por cada tres árboles más que se planten por acre, el número de manzanas disminuye en 12 al año. ¾Cuántos árboles debe plantar para obtener el mayor

  20. Curso de Actualización sobre el Teatro Iberoamericano

    E-print Network

    1990-10-01

    148 LATIN AMERICAN THEATRE REVIEW Curso de Actualización sobre el Teatro Iberoamericano Entre el 16 y el 27 de octubre de 1990 en Cádiz, España, se llevó a cabo el Curso de Actualización sobre Teatro Iberoamericano. El curso fue dirigido a...

  1. La intervención estatal en el mercado del suelo urbano. La reconstrucción del eje cafetero: El caso de Armenia

    Microsoft Academic Search

    Santiago Alberto Camargo; Samuel Jaramillo González

    2011-01-01

    A raíz del pavoroso terremoto que tuvo lugar en el Eje Cafetero colombiano en 1999, que causó grandes pérdidas humanas y una gran destrucción, sobre todo del stock inmobiliario, hubo un gran esfuerzo nacional de solidaridad tanto estatal como privado para socorrer las víctimas. El principal rubro fueron recursos en la forma de subsidios a los afectados para que compraran

  2. NOTIFICACIN CONJUNTA SOBRE PRACTICAS DE PRIVACIDAD Y SOBRE LAS DISPOSICIONES DE ASISTENCIA

    E-print Network

    Príncipe, José Carlos

    NOTIFICACIÓN CONJUNTA SOBRE PRACTICAS DE PRIVACIDAD Y SOBRE LAS DISPOSICIONES DE ASISTENCIA MEDICA INFORMACIÓN MEDICA ACERCA DE USTED Y COMO PUEDE USTED OBTENER DICHA INFORMACIÓN. FAVOR REVISARLA MEDICA ACERCA DE USTED: Comprendemos que su información médica es algo personal y estamos comprometidos

  3. Jornadas sobre Tecnologas y Aplicaciones de

    E-print Network

    Escolano, Francisco

    espaciales para misiones científicas, tecnológicas y de sostenibilidad. 09:30 - 10:00 La Agencia EspacialJornadas sobre Tecnologías y Aplicaciones de las Comunicaciones Espaciales EMPRESA Colaboran-CV APLICACIONES Y TECNOLOGÍAS ESPACIALES EN LA COMUNIDAD VALENCIANA. Instituto Superior de Investigación

  4. Teorías sobre cobertura con contratos de futuro

    Microsoft Academic Search

    Vicent Aragó Manzana

    2009-01-01

    En este trabajo se presenta una revisión de las principales teorías sobre cobertura con contratos de futuro y de los distintos métodos de estimación utilizados para determinar el ratio de cobertura óptimo. La aproximación a la cobertura más utilizada en la literatura especializada es la basada en el modelo de la teoría de carteras. No obstante, debido a sus hipótesis

  5. O casamento entre pessoas do mesmo sexo. Sobre \\

    Microsoft Academic Search

    MIGUEL VALE DE ALMEIDA

    2006-01-01

    O artigo constitui uma primeira reflexão sobre dados de uma pesquisa realizada em Barcelona. O debate público sobre o casamento entre pessoas do mesmo sexo revela as tensões sociais em torno do género, da sexualidade, da conjugalidade, da procriação e da parentalidade. As representações simbólicas e os discursos ideológicos sobre estes campos vêem revelado o seu carácter construído no momento

  6. Reflexiones sobre la ética del Derecho

    Microsoft Academic Search

    Elida Aponte Sanchez

    2010-01-01

    This presentation is part of the Conceptions of Autonomy track.\\u000aEl fenómeno jurídico, en todas sus manifestaciones, contiene dos notas que son de innegable trascendencia: a) es un orden regulador o normativo, pero no sólo eso como veremos más adelante, b) versa sobre conductas, actos, comportamientos entre sujetos y sujetas. El ámbito jurídico es el ámbito de la conducta intersubjetiva,

  7. 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.

  8. Sobre el poder, fatal, de la llegenda

    Microsoft Academic Search

    Joan F. Mira

    2009-01-01

    Català:<\\/b> Reflexió sobre l'impacte de l'accés dels Borja al poder pontifici i polític en general, com a origen de la llegenda creada al voltant de la família.\\u000aEnglish:<\\/b> Reflections on the impact of Borgia's papacy and political enpowerment upon the origin of the black legend constructed around their family.\\u000aItaliano:<\\/b> Riflessione sull'impatto dell'accesso dei Borgia al potere pontificio e politico

  9. EFECTO DE UNA QUEMA CONTROLADA SOBRE LA POBLACIÓN MICROBIANA EN SUELOS CON PASTURAS EN LA SAIS TUPAC AMARU - JUNÍN, PERÚ EFFECT OF PRESCRIBED BURNING ON MICROBIAL POPULATIONS OF GRASSLANDS SOILS OF THE TUPAC AMARU SAIS - JUNIN, PERU

    Microsoft Academic Search

    Diana L. Torres Vargas; Roberto Quiroz Guerra; Juan Juscamaita Morales

    2004-01-01

    A study was carried out to evaluate the effects of prescribed burning (head fire) in populations of aerobic bacteria, anaerobic bacteria, fungi and two genus of Nitrogen-fixing bacteria (Azotobacter sp. and Azospirillum sp.) in Junín. Samples were taken from the end of the dry season (September 2001) to the beginning of the following dry season (June 2002). The burning experiment

  10. Simulating transport of nitrogen and phosphorus in a Cambisol after natural and simulated intense rainfall.

    PubMed

    Kaufmann, Vander; Pinheiro, Adilson; Castro, Nilza Maria dos Reis

    2014-05-01

    Intense rainfall adversely affects agricultural areas, causing transport of pollutants. Physically-based hydrological models to simulate flows of water and chemical substances can be used to help decision-makers adopt measures which reduce such problems. The purpose of this paper is to evaluate the performance of SWAP and ANIMO models for simulating transport of water, nitrate and phosphorus nutrients, during intense rainfall events generated by a simulator, and during natural rainfall, on a volumetric drainage lysimeter. The models were calibrated and verified using daily time series and simulated rainfall measured at 10-minute intervals. For daily time-intervals, the Nash-Sutcliffe coefficient was 0.865 for the calibration period and 0.805 for verification. Under simulated rainfall, these coefficients were greater than 0.56. The pattern of both nitrate and phosphate concentrations in daily drainage flow under simulated rainfall was acceptably reproduced by the ANIMO model. In the simulated rainfall, loads of nitrate transported in surface runoff varied between 0.08 and 8.46 kg ha(-1), and in drainage form the lysimeter, between 2.44 and 112.57 kg ha(-1). In the case of phosphate, the loads transported in surface runoff varied between 0.002 and 0.504 kg ha(-1), and in drainage, between 0.005 and 1.107 kg ha(-1). The use of the two models SWAP and ANIMO shows the magnitudes of nitrogen and phosphorus fluxes transported by natural and simulated intense rainfall in an agricultural area with different soil management procedures, as required by decision makers. PMID:24650647

  11. Water infiltration and hydraulic conductivity in sandy cambisols: impacts of forest transformation on soil hydrological properties

    Microsoft Academic Search

    Oliver Bens; Niels Arne Wahl; Holger Fischer; Reinhard F. Hüttl

    2007-01-01

    Soil hydrological properties like infiltration capacity and hydraulic conductivity have important consequences for hydrological\\u000a properties of soils in river catchments and for flood risk prevention. They are dynamic properties due to varying land use\\u000a management practices. The objective of this study was to characterize the variation of infiltration capacity, hydraulic conductivity\\u000a and soil organoprofile development on forest sites with comparable

  12. Bibliografa bsica, webs y blogs sobre mujer e islam

    E-print Network

    Escolano, Francisco

    Bibliografía básica, webs y blogs sobre mujer e islam: [La bibliografía y las referencias en Internet sobre mujer e islam es amplísima. Aquí solo presentamos unos pocos títulos. ] - L. Abu-Lughod (ed, 1996, - L. Ahmed, Women and gender in Islam: historical roots of a modern debate, New Haven: Yale

  13. Consideraciones sobre los alumnos que abandonan el sistema escolar y las repercusiones sobre la for- mación de los profesores

    Microsoft Academic Search

    Escolástica MACÍAS GÓMEZ

    RESUMEN En cada curso escolar un elevado número de alumnos de educación secundaria obligatoria abandona el sis- tema escolar sin conocimientos suficientes sobre los que basar la adquisición o el desarrollo de competencias para el ejercicio profesional. En estas páginas se pretende analizar algunas consideraciones sobre lo que ocu- rre en las aulas, en la interacción entre el profesor y

  14. Sobre el estado evolutivo de ? Pictoris

    NASA Astrophysics Data System (ADS)

    Brunini, A.; Benvenuto, O. G.

    Desde el descubrimiento de fuertes excesos infrarrojos en ? Pictoris, esta estrella ha sido muy estudiada y es considerada candidata a poseer un sistema planetario propio. ? Pic está rodeada de un disco asimétrico de polvo que se observa de canto y que esta vacío a distancias <= 40 AU. Esto se considera una fuerte evidencia en favor de la presencia de (al menos) un planeta gigante. Recientemente se han observado líneas de material circunestelar que se han interpretado como consecuencia de la caída de objetos cometarios sobre esta estrella. Recientemente se ha utilizado la existencia del disco de polvo para atribuir una edad corta (pre - secuencia principal) a ?Pic. Sin embargo, la evaporación de estos cometas provee suficiente polvo como para explicar la presencia del disco observado sin necesidad de edades cortas. En este trabajo mostramos que la comparación entre la tasa de impactos cometarios estimada en el Sistema Solar para diferentes etapas de su evolución y los datos observados en ? Pic indica edades avanzadas para ? Pic. Esta estimación debe tomarse con cautela ya que depende de la estructura de los sistemas planetarios. Además mostramos que, desde el punto de vista de la evolución estelar y con las incertezas presentes en la luminosidad y la temperatura efectiva, existe un continuo de edades posible para ? Pic. Sin embargo, empleando los datos provenientes de los flujos cometarios encontramos que una edad prolongada es consistente con ambos tratamientos.

  15. Lo que usted necesita saber sobre™ el cáncer de cérvix

    Cancer.gov

    Contiene información sobre las opciones de tratamiento, la obtención de una segunda opinión, los cuidados de seguimiento y las fuentes de apoyo para alguien que ha sido diagnosticado recientemente con cáncer de cérvix o cuello uterino.

  16. VIII SIMPOSIO INTERNACIONAL SOBRE EDUCACIN Y CULTURA EN IBEROAMRICA

    E-print Network

    Paris-Sud XI, Université de

    VIII SIMPOSIO INTERNACIONAL SOBRE EDUCACIÓN Y CULTURA EN IBEROAMÉRICA Hacia una competencia diferencias. La interculturalidad, entendida como la interacción intencional entre culturas o individuos solidaridad. Si al término « cultura » se le reconoce todo su valor, ello implica reconocimiento de valores

  17. LAS IDEAS SOBRE EL HOMBRE EN LA GRECIA ANTIGUA

    Microsoft Academic Search

    JUAN JAVIER SAAVEDRA MAYORGA

    2007-01-01

    Resumen El presente artículo es el primero de una serie de documentos que tienen por objeto identificar el paradigma antropológico sobre el cual se ha construido el pensamiento administrativo, y su impacto en las prácticas administrativas contemporáneas. Para ello se parte de una perspectiva histórica, examinando las distintas concepciones que se han tenido acerca del hombre, y de qué modo

  18. Metodologas de Programacin II (Funcional): Sobre este curso.

    E-print Network

    Guerra Hernández, Alejandro

    Metodologías de Programación II (Funcional): Sobre este curso. Dr. Alejandro Guerra Bienvenidos al curso de Metodología de Programación II, en la Maestría en In- teligencia Artificial de la Universidad Veracruzana. El tema central de este curso es la programación funcional, y complementa al curso de

  19. SOBRE LA DEFINICION DE KTEORIA ALGEBRAICA Pere Pascual Gainza

    E-print Network

    Politècnica de Catalunya, Universitat

    Universitat Polit`ecnica de Catalunya Diagonal 647, 08028 Barcelona 25/07/96 Indice Introducci'on. 1. El grupo no se pretende dar un panorama bibliogr'afico sobre la K ­teor'ia. Estas notas tienen su origen en

  20. SOBRE AS SIGNIFICAES JURDICAS DA RESPONSABILIDADE POLTICA* Eric Millard*

    E-print Network

    Paris-Sud XI, Université de

    um regime juridicamente organizado ­ um Estado de Direito"). Refletir sobre o valor lógico real desta Direito Constitucional do primeiro ano de Direito que pode saber o que é a responsabilidade política. O no conhecimento do Direito. * Réplica de artigo publicado In: Ph. Ségur, Gouvernants, quelles responsabilité?. L

  1. Sobre algunos espacios de funciones continuas en el circulo unidad

    E-print Network

    Martín Peinador, Elena

    Sobre algunos espacios de funciones continuas en el c´irculo unidad Elena CILLERO y Elena MART Arkhangelskii, destaca como un gran cap´itulo el estudio de los espacios de funciones reales continuas definidas en un espacio topol´ogico X. En efecto, las distintas estructuras algebraicas en los espacios C

  2. Charla con el doctor Walter Willett sobre la alimentación y el cáncer

    Cancer.gov

    El doctor Walter Willett, presidente del departamento de nutrición de la Facultad de Salud Pública de Harvard, responde a preguntas sobre cómo han evolucionado los puntos de vista sobre la alimentación y el riesgo de cáncer.

  3. Teorías y doctrina sobre las relaciones del derecho con la economía

    Microsoft Academic Search

    William Leguizamón Acosta

    2004-01-01

    A partir de la conformación definitiva de la Economía como ciencia autónoma; hecho sucedido a partir de la obra de ADAM SMITH “sobre la naturaleza y riqueza de las Naciones” se ha venido discutiendo con intensidad sobre las estrechas relaciones que esta disciplina mantiene con el Derecho. Algunos abordan el tema bajo condiciones de dominio de una ciencia sobre la

  4. OS RECENSEAMENTOS DEMOGRAFICOS : UMA FONTE DE INFORMAO SOBRE A FILIAO

    E-print Network

    Boyer, Edmond

    5 OS RECENSEAMENTOS DEMOGRAFICOS : UMA FONTE DE INFORMA��O SOBRE A FILIA��O RELIGIOSA NO BRASIL NO BRASIL O Brasil é um país de tradição estatística. Os recenseamentos são, em princípio, realizados a cada *** Geógrafa, Pontifícia Universidade Católica, PUC, Rio de Janeiro ­ Brasil. #12;PHILIPPE WANIEZ VIOLETTE

  5. INFORME SOBRE LA IMPLANTACI DE SAP GESTI DE RECURSOS HUMANS

    E-print Network

    Casanellas, Marta

    INFORME SOBRE LA IMPLANTACI� DE SAP GESTI� DE RECURSOS HUMANS DOCUMENT INFORMATIU CG 4/11 2011 Vicerector de Personal Acadèmic Gerència Barcelona 9 de novembre de 2011 #12;Projecte SPA Implantació de SAP de Becas ·Tarifes #12;3a fase març-maig/2012 (en revisió) #12;Projecte SPA Implantació de SAP

  6. Nitrification and acidification from urea application in red soil (Ferralic Cambisol) after different long-term fertilization treatments

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Purpose. Long-term manure applications can prevent or reverse soil acidification by chemical nitrogen (N) fertilizer. However, the resistance to re-acidification from further chemical fertilization is unknown. The aim of this study was to examine the effect of urea application on nitrification and a...

  7. Reflexión bioética sobre el uso de organismos genéticamente modificados

    PubMed Central

    Yunta, Eduardo Rodríguez

    2011-01-01

    El presente artículo reflexiona desde los 4 principios de la bioética el uso comercial de organismos genéticamente modificados. Se cuestiona fundamentalmente la falta de transferencia de tecnología entre el mundo desarrollado y en desarrollo y el que el presente sistema de patentamiento de organismos vivos modificados fomenta intereses comerciales y no da debida importancia al desarrollo sostenible de la agricultura y ganadería en los países en desarrollo, donde más se necesita. Se reflexiona sobre la importancia que tiene evaluar los riesgos antes de introducirse en el mercado organismos genéticamente modificados y la necesidad de regulación en los países. PMID:21927675

  8. DEBAT SOBRE LA NATURALESA, COMPOSICI I FUNCIONS DELS RGANS DE GOVERN DE LA UNIVERSITAT EN EL

    E-print Network

    Politècnica de Catalunya, Universitat

    DEBAT SOBRE LA NATURALESA, COMPOSICI� I FUNCIONS DELS �RGANS DE GOVERN DE LA UNIVERSITAT EN EL de febrer de 2014 #12;CU UPC 24/02/2014 Debat sobre la naturalesa, composició i funcions dels òrgans DE LA UPC (24/02/2014) 8. Debat sobre la naturalesa, composició i funcions dels òrgans de govern de

  9. NOTAS TAXONÓMICAS SOBRE EL GÉNERO VALERIANELLA MILL. (VALERIANACEAE) PARA LA FLORA IBÉRICA

    Microsoft Academic Search

    Juan Antonio DEVESA; Josefa LÓPEZ; Raúl GONZALO

    2005-01-01

    RESUMEN. Notas taxonómicas sobre el género Valerianella Mill. (Valerianaceae) para la Flora Ibérica. Sobre la base de estudios experimentales que han puesto de manifiesto que Valerianella coronata y V. pumila no son sino dos morfotipos de una misma especie, que difieren fundamentalmente en caracteres carpológicos, se plantea la hipótesis de que igual sucede en el caso de V. locusta V.

  10. Que pas este? Narrativas sobre o Brasil criadas por brasileiros residentes no exterior

    E-print Network

    Paris-Sud XI, Université de

    Que país é este? Narrativas sobre o Brasil criadas por brasileiros residentes no exterior Luis utilizados no Brasil, como o Orkut, existem mais de sessenta comunidades com o título "Brasileiros-representação e a imagem do Brasil e dos brasileiros no exterior ou sobre a percepção da terra de chegada. O

  11. Informacin grabada sobre su pago ms reciente de beneficios del Seguro de Desempleo (UI, siglas en

    E-print Network

    Información grabada sobre su pago más reciente de beneficios del Seguro de Desempleo (UI, siglas en este mensaje en español. ¸ Marque el 1 para información sobre su pago de Seguro de Desempleo y Tarjeta la cantidad que Ud. recibiría antes de deducciones si se le pagara beneficios del seguro de desempleo

  12. Per: Chirapaq celebra 25 aos con un foro sobre "Derechos de los Pueblos Indgenas"

    E-print Network

    Islas, León

    Perú: Chirapaq celebra 25 años con un foro sobre "Derechos de los Pueblos Indígenas celebrará su 25 aniversario con el foro público internacional: "Derechos de los Pueblos Indígenas: Avances y la Nación Cree, ex parlamentario y miembro del Mecanismo de Expertos sobre los Derechos de los

  13. Uma Aula Prtica sobre LISP Siang Wun Song -Universidade de So Paulo -IME/USP

    E-print Network

    Song, Siang Wun

    Uma Aula Prática sobre LISP Siang Wun Song - Universidade de São Paulo - IME/USP MAC 5710 - Estruturas de Dados - 2008 Siang Wun Song - Universidade de São Paulo - IME/USP Uma Aula Prática sobre LISP #12;Linguagem LISP Surgiu no final dos anos 50 - John McCarthy (MIT). Linguagem para processamento

  14. Adiciones a la avifauna del Valle de Aburr y comentarios sobre la investigacin ornitolgica local

    E-print Network

    Cuervo, Andrés

    Adiciones a la avifauna del Valle de Aburrá y comentarios sobre la investigación ornitológica local tendientes a mejorar la calidad de información disponible sobre la avifauna del Valle de Aburrá. La taxonomía & Graves 1995). Especies nuevas para la avifauna del Valle de Aburrá Águila Paramuna Geranoaëtus

  15. Recerca etnogràfica sobre els valors dels estudiants d'Infermeria i Fisioteràpia de la URL

    Microsoft Academic Search

    Montserrat Alguacil de Nicolás; Josep M. Duart; Concepció Poch

    2008-01-01

    Els mecanismes de transformació ètica s'han accelerat, i per tant, el debat generat sobre l'eticitat té una vitalitat i una extensió social fins ara desconegudes. L'actual pluralitat de propostes manté un fòrum constantment obert sobre el que és bo per a l'home i per a la convivència humana, i el que no ho és.\\u000aLa novetat i característica principal de

  16. O que bilíngues bimodais têm a nos dizer sobre desenvolvimento bilíngue?

    PubMed Central

    de Quadros, Ronice Müller; Lillo-Martin, Diane; Pichler, Deborah Chen

    2013-01-01

    O objetivo deste trabalho é apresentar o que as pesquisas que estamos desenvolvendo com crianças ouvintes, filhas de pais surdos, adquirindo Língua Brasileira de Sinais (Libras) e Português e Língua de Sinais Americana (ASL) e Inglês (Lillo-Martin et al. 2010) têm a nos dizer sobre desenvolvimento bilíngue. Os dados deste estudo fazem parte de um banco de dados de interações espontâneas coletadas longitudinalmente, alternando contextos de aquisição da Libras e do português como língua alvo, no Brasil e dados coletados longitudinalmente. nos mesmos contextos, de crianças adquirindo ASL e inglês1. Além disso, há também dados do estudo experimental com testes aplicados nos dois pares de línguas que se agregam ao presente estudo. Uma visão geral dos estudos desenvolvidos sobre a aquisição bilíngue bimodal por crianças ouvintes, filhas de pais surdos, será apresentada e, então, serão expostos alguns aspectos linguísticos deste tipo de aquisição, considerando as discussões sobre aquisição bilíngue a partir da pesquisa realizada. PMID:24431480

  17. Discussions about the Nature of Science in a Course on the History of Astronomy. (Spanish Title: Discusiones sobre la Naturaleza de la Ciencia en un Curso sobre Historia de la Astronomía.) Discussões sobre a Natureza da Ciência em um Curso sobre a História da Astronomia

    NASA Astrophysics Data System (ADS)

    Pires de Andrade, Victória Flório; L'Astorina, Bruno

    2010-07-01

    There are an increasing number of researches in science education that affirm the importance of discussions on the "nature of science" in basic education level as well as in teacher training. The history of science applied to education is a way to contextualize epistemological discussions, allowing both the understanding of scientific content and learning about science concepts. We present some reasonably consensual definitions on the nature of science that have been widely discussed by the academic community. We show also some episodes in the history of astronomy which can lead to discussions involving some aspects of the nature of science, and how they can do it. Hay un número creciente de investigaciones en la enseñanza de las ciencias que afirman la importancia de debates sobre la "naturaleza de la ciencia" en la educación básica y formación del profesorado. La historia de la ciencia aplicada a la educación es una manera de contextualizar los debates de la epistemología, lo que permite tanto la comprensión de los contenidos científicos como el aprendizaje de conceptos científicos. En esto trabajo, presentamos algunas definiciones bastante consensuales sobre la naturaleza de la ciencia que han sido ampliamente discutidas por la comunidad académica y mostramos cómo algunos episodios en la historia de la astronomía pueden llevar a discusiones sobre algunos aspectos de la naturaleza de la ciencia. Há um número crescente de pesquisas na área de ensino de ciências que afirmam a importância de discussões sobre a "natureza da ciência" na educação básica e na formação de professores. A história da ciência aplicada ao ensino é uma maneira de contextualizar discussões epistemológicas, permitindo tanto a compreensão de conteúdos científicos quanto o aprendizado de noções sobre as ciências. Neste trabalho apresentamos algumas definições razoavelmente consensuais sobre a natureza da ciência que foram amplamente discutidas pela comunidade acadêmica e mostramos como alguns episódios da história da astronomia podem levar a discussões envolvendo alguns dos aspectos da natureza da ciência.

  18. Los discursos sobre sexualidad en la obra de Alicia Gaspar de Alba

    E-print Network

    Vivancos P?erez, Ricardo F

    2002-01-01

    sexualidad que mas han influido en las dos ultimas decadas del siglo XX, hasta llegar a formulaciones sobre el deseo lesbico. En la segunda parte recojo las teorizaciones y conceptos encontrados y los aplico al estudio de la construccion de los discursos... publicos mas amplios. Al igual que en las secciones previas, conecto en todo momento sus escritos con otras obras de feministas-lesbianas chicanas, sobre todo con las de Cherrie Moraga, Gloria Anzaldua y Emma Perez en el ambito literario. A Mari siempre...

  19. Las IX Jornadas de Derecho penal, Derecho penitenciario y Criminologa en la UA reflexionan sobre el nuevo panorama del terrorismo

    E-print Network

    Escolano, Francisco

    Las IX Jornadas de Derecho penal, Derecho penitenciario y Criminología en la UA reflexionan sobre socio-criminológica" es el tema sobre el que se centran las IX Jornadas de Derecho penal, Derecho, Jesús Pradells, y a la decana de la Facultad de Derecho de la UA, Amparo Navarro. Las Jornadas, que se

  20. V SEMINARIO HISPANO-ARGENTINO: Los discursos sobre la Ciencia y las Nuevas Tecnologas en la Sociedad del Conocimiento

    E-print Network

    Escolano, Francisco

    V SEMINARIO HISPANO-ARGENTINO: Los discursos sobre la Ciencia y las Nuevas Tecnologías en la Universidad Nacional del Litoral (Argentina), se centra este año en los "Discursos sobre la Ciencia y las procede, esta vez centrando la atención en el discurso de la ciencia y de las nuevas tecnologías. Se

  1. A Monsanto no Brasil: Discursos publicitrios e tecno-cientficos sobre os transgnicos(*)

    E-print Network

    Paris-Sud XI, Université de

    1 A Monsanto no Brasil: Discursos publicitários e tecno- científicos sobre os transgênicos.reigota@prof.uniso.br marcos.reigota@pq.cnpq.br Resumo: O trabalho aborda as estratégias e práticas discursivas da Monsanto Nacional de Pesquisa Científica. O artigo é pautado em documentos publicitários difundidos pela Monsanto

  2. El testimoniatge de l'Escriptura i la tradició sobre el ministeri apostòlic o de comunió

    Microsoft Academic Search

    Jaume Fontbona

    2009-01-01

    Aquest estudi cerca les arrels del ministeri apostòlic o de comunió en el Nou Testament (Escriptura) i té en compte els estudis i les síntesis ja fetes sobre els textos litúrgics i patrístics dels primers segles, representatius de l’Església indivisa, i els estudis i les síntesis dels textos conciliars de Trento i del Vaticà II, representatius de l’Església llatina (Tradició),

  3. Avaliao do INPE/OBT sobre a misso para validao DETER Introduo

    E-print Network

    . A estatística da validação, bem como as fotos e as respectivas avaliações seguem abaixo. Análise somente das 73 fotos válidas, ou seja, fotos tiradas exatamente sobre um polígono do Deter: Fotos avaliadas como: Desmatamento = 69 (94.5 %) Fotos avaliadas como: Nao é desmatamento = 4 (5.5 %) Graficamente temos: Detalhando

  4. ORIENTACIÓN GENERAL PARA EDUCADORES DE LA ENSEÑANZA MEDIA SUPERIOR, SOBRE SEXUALIDAD EN LA ADOLESCENCIA

    Microsoft Academic Search

    Miguel Angel Miranda Martín

    2008-01-01

    Es de suma importancia la introducción del tema de la educación sexual con mayor ahínco en esta etapa de la vida de la adolescencia comprendida entre los 10 y 20 años donde se pone de manifiesto la curiosidad por conocer sobre su sexualidad teniendo en cuenta los conocimientos insuficientes o erróneos .La falta de orientación sexual los conducen a conflictos

  5. CENTRO CLINICO DE CNCER DE STANFORD CARTA INFORMATIVA SOBRE LA CITA PARA PACIENTES NUEVOS

    E-print Network

    Bogyo, Matthew

    HEMATOLOGY Centro Clínico de Cáncer de Stanford Centro De Medicina Avanzada Fecha: 875 Blake Wilbur Drive/a _______________________________________, Tiene una cita programada con el Departamento de Hematology. Por favor vea la fecha y hora de su cita CÁNCER DE STANFORD CARTA INFORMATIVA SOBRE LA CITA PARA PACIENTES NUEVOS HEMATOLOGY La clínica Hematology

  6. JORNADA SOBRE LA TRANSFORMACIN DEL DERECHO PRIVADO ANTE LA CRISIS1

    E-print Network

    Rey Juan Carlos, Universidad

    JORNADA SOBRE LA TRANSFORMACIÓN DEL DERECHO PRIVADO ANTE LA CRISIS1 . Lugar de celebración: Sala Conde. Catedrático de D. Constitucional y Director del Instituto de Derecho Público. URJC. 10:00 Conferencia inaugural Prof. Dr. D. Domingo Bello Janeiro, Catedrático de Derecho Civil. Universidad de

  7. Filantropía no asistencialista: Las memorias de Boris Garfunkel sobre Colonia Mauricio

    Microsoft Academic Search

    Edgardo Zablotsky

    2012-01-01

    Colonia Mauricio, cercana a Carlos Casares, Provincia de Buenos Aires, se estableció en 1891 sobre las primeras tierras adquiridas por la Jewish Colonization Association (J.C.A.) en nuestro país y, por lejos, las más fértiles. En relación a este hecho, el Informe de 1902 de los Inspectores del Consejo Central de París señalaba que su excelente locación había convertido a Mauricio

  8. Aquilo que no tem sido dito no debate sobre a "Cincia em crise"

    E-print Network

    Instituto de Sistemas e Robotica

    Aquilo que não tem sido dito no debate sobre a "Ciência em crise" José Manuel Fernandes Extremo últimos dias a experiência de mais uma "zona de J desastre". Desta vez, garante- se, o que está em causa é o futuro da Ciência em Portugal. Como é típico nestas situações, o "consenso" que rapidamente se

  9. Some Research-Based Issues and Recommendations Expressed at the Seminario Internacional Sobre la Educacion Bilingue.

    ERIC Educational Resources Information Center

    Bernal, Ernesto M.

    The first Seminario Internacional Sobre la Educacion Bilingue (International Seminar on Bilingual Education), under the aegis of the National Association for Bilingual Education and the Mexican secretary for public education, brought together professionals from Canada, the United States, and Mexico in Oaxtepec, Mexico in November 1986 to share…

  10. INFLUÊNCIA DE DIFERENTES CLASSES DE INFESTAÇÃO POR MANCHA PÚRPURA SOBRE O VIGOR DE SEMENTES DE SOJA

    Microsoft Academic Search

    LUCIANO DOS; REIS VENTUROSO; MARCO ANTÔNIO SEDREZ; FÁBIO RÉGIS DE SOUZA; ANDERSON CRISTIAN BERGAMIN; LENITA APARECIDA CONUS

    RESUMO: O trabalho propôs-se a analisar a influência de diferentes classes de infestação por mancha púrpura (Cercospora kikuchii) no tegumento das sementes de três cultivares de soja, sobre o vigor de plântulas no município de Dourados - MS. O experimento foi conduzido na Embrapa Agropecuária Oeste, em outubro de 2006. As classes de infestação foram determinadas visualmente e classificadas em

  11. ACTIU, LA FUNDACIN PACUAL ROS AGUILAR Y APSA NOS HABLAN SOBRE RESPONSABILIDAD SOCIAL CORPORATIVA

    E-print Network

    Escolano, Francisco

    ACTIU, LA FUNDACIÓN PACUAL ROS AGUILAR Y APSA NOS HABLAN SOBRE RESPONSABILIDAD SOCIAL CORPORATIVA Alicante (APSA). Estas empresas e instituciones participarán en la mesa redonda "Responsabilidad social y la empresa traduce en hechos su responsabilidad social con la adhesión a los 10 principios del Pacto

  12. Conectarse a la red inalmbrica (WiFi) EDUROAM Hacer doble click sobre el

    E-print Network

    Autonoma de Madrid, Universidad

    Conectarse a la red inalámbrica (WiFi) EDUROAM Paso 1: Hacer doble click sobre el icono de conexiones de red inalámbricas. Paso 2: Esperar a que localice redes inalámbricas cercanas y hacer doble en la barra de tareas que tenemos cuando estamos conectados #12;Desconectarse de la red inalámbrica

  13. Centro de Contacto del NCI—Servicio de Información sobre el Cáncer

    Cancer.gov

    El Instituto Nacional del Cáncer (NCI) ofrece información actualizada, precisa, confiable y fácil de entender sobre diferentes de temas de cáncer. Los especialistas en información le pueden ayudar en el teléfono 1-800-422-6237 (1-800-4-CANCER).

  14. Influência do óleo de linhaça sobre o desempenho e a qualidade dos ovos de poedeiras semipesadas

    Microsoft Academic Search

    Fernando Guilherme Perazzo Costa; Janete Gouveia de Souza; José Humberto Vilar da Silva; Carlos Bôa-Viagem Rabello; Cláudia de Castro Goulart; Raul da Cunha Lima Neto

    2008-01-01

    RESUMO - O experimento foi conduzido para avaliar a influência da adição de óleo de linhaça em substituição ao óleo de soja em rações para poedeiras semipesadas sobre o desempenho e a qualidade interna e externa dos ovos. Utilizaram-se 192 poedeiras da linhagem Bovans Godline com 29 semanas de idade, distribuídas em seis tratamentos, que consistiram de uma dieta controle

  15. Sobre as Bases de Referência Celeste (On the Celestial Reference Frames)

    NASA Astrophysics Data System (ADS)

    Martin, Vera A. F.; Poppe, Paulo C. R.

    2003-05-01

    Ao longo deste artigo, apresentamos, como continuidade à discussão apresentada no trabalho anterior, uma primeira discussão sobre algumas das principais bases de referência utilizadas em Astronomia. Da mesma forma, esperamos que o presente texto possa ser utilizado ao longo dos cursos de Introdução à Astronomia das atuais graduações de Física e áreas afins.

  16. Gua breve sobre la La anemia es un trastorno de la sangre. La sangre es

    E-print Network

    Bandettini, Peter A.

    Anemia Guía breve sobre la La anemia es un trastorno de la sangre. La sangre es un líquido esencial de anemia, como la anemia por deficien- cia de hierro, la anemia perniciosa, la anemia aplásica y la anemia hemolítica. Los distintos tipos de anemia tienen relación con diversas enfermedades y problemas de

  17. I JORNADAS SOBRE TRASTORNO DE DFICIT DE ATENCIN CON/SIN HIPERACTIVIDAD. CONOCIENDO EL

    E-print Network

    Rey Juan Carlos, Universidad

    I JORNADAS SOBRE TRASTORNO DE DÉFICIT DE ATENCIÓN CON/SIN HIPERACTIVIDAD. CONOCIENDO EL TDAH PARA SU CORRECTA INTERVENCIÓN EN EL AULA Si existe un trastorno infantil que desborda la atención de los profesores y que afecta al desarrollo normal de cualquier aula de clase es el Trastorno por Déficit de

  18. Impacto de la Red de Interconexión sobre los Protocolos de Coherencia en Sistemas Multiprocesador

    Microsoft Academic Search

    Lucía G. Menezo; Javier Merino; Pablo Prieto; Pablo Abad; José Ángel Gregorio

    1 Resumen—En este trabajo se han analizado algunas posibilidades de aceleración de los protocolos de coherencia empleando el conocimiento que la red de interconexión tiene o puede tener sobre los mensajes que circulan por los sistemas multiprocesador. Se ha determinado el número de saltos de los mensajes necesarios para mantener la coherencia empleando un entorno de simulación basado en el

  19. EFEITO DO RECOBRIMENTO DE SEMENTES DE ALGODÃO SOBRE SUA QUALIDADE FISIOLÓGICA

    Microsoft Academic Search

    VICENTE DE PAULA QUEIROGA; JOSÉ MARIA DURAN; DIEGO ANTONIO; NÓBREGA QUEIROGA

    4 RESUMO: A encapsulação de sementes com materiais de cobertura e o uso de equipamentos adequados constitui-se numa técnica simples e eficiente que permite alterar a forma e o tamanho das sementes, podendo facilitar a realização da semeadura de precisão. Com o presente trabalho, objetivou-se estudar o processo de revestimento e seus efeitos sobre a qualidade fisiológica de sementes de

  20. Convocatoria de participacin V Coloquio internacional sobre la Enseanza del Espaol,

    E-print Network

    Parrott, Lael

    aprendizaje de ELE, y sus implicaciones en el aula. El Comité Organizador del V Coloquio sobre la Enseñanza métodos para la enseñanza y aprendizaje de ELE 2) Las nuevas tecnologías en ELE 3) Materiales didácticos Equipamiento necesario para la presentación: proyector, computadora, conexión a Internet Aunque la lengua del

  1. Impacto de la cultura sobre el desarrollo y la asesoría económica

    Microsoft Academic Search

    Lauchlin Currie

    1993-01-01

    Para poder diseñar una teoría sobre la asesoría económica, es necesario distinguir entre los conceptos que la determinan y aquellos que la condicionan. Es esencial establecer una distinción entre la teoría y la política, y tener en cuenta la interrelación existente entre la cultura y los grados de desarrollo. El desarrollo no es un estado sujeto a mediciones cuantitativas sino

  2. Estudio sobre alternativas de atención integral a la niñez menor de 4 años (1a fase)

    Microsoft Academic Search

    Asesorías para el Desarrollo S. A

    2006-01-01

    Este estudio recoge y sistematiza un conjunto de información disponible sobre: 1) el nivel de desarrollo infantil en sectores de pobreza en Chile; 2) la oferta de programas e instancias de apoyo al desarrollo infantil que existen para esta población (metodologías, estrategias, agentes educativos); 3) la efectividad de estos programas e instancias; 4) los costos de las principales modalidades de

  3. Prazer e perigo: notas sobre feminismo, sex-shops e S\\/M

    Microsoft Academic Search

    Maria Filomena Gregori

    2004-01-01

    O objeto deste artigo é o de discutir as novas conceituações sobre a sexualidade, desejo e corpo desenvolvidas pelas teorias feministas de origem anglo-saxã no exame da pornografia. Além de um mapeamento desta literatura, são analisados aspectos relacionados a novas formas de erotismo, a partir de pesquisa exploratória junto a sex-shops em São Francisco e Berkeley, EUA. São analisadas tendências

  4. La vivienda mínima en España: primer paso del debate sobre la vivienda social

    Microsoft Academic Search

    Ma. Concepción Diez-Pastor Iribas

    2007-01-01

    Durante los años veinte hubo en España un intenso debate sobre el problema de la vivienda mínima al chocar el planteamiento defendido en el resto de Europa con el vigente aquí desde la aprobación en 1911 de la Ley de Casas Baratas. Esa discusión es decisiva para centrar el problema de la vivienda social desde 1939 hasta hoy. En España,

  5. Totem e Tabu: Uma reflexão sobre o Complexo de Édipo na origem da civilização

    Microsoft Academic Search

    Josefa D. D. de Carvalho

    2002-01-01

    Resumo A decisão pela escolha deste tema, se deu a partir do interesse despertado nas apresentações e discussões em sala de aula sobre o texto Totem e Tabu. Para tanto, foi feito um recorte na teoria freudiana de um dos seus conceitos mais importante: o Complexo de Édipo. Este, segundo Freud, parece apontar para a possibilidade da sua existência na

  6. Emissions of Nitrous Oxide, Ammonia, and Carbon Dioxide from a Cambisol at Two Contrasting Soil Water Regimes and Urea Granular Sizes

    Microsoft Academic Search

    M. I. Khalil; U. Schmidhalter; R. Gutser

    2009-01-01

    The superiority of mixing and deep placement of prilled urea (PU) or urea supergranules (USG) over surface?broadcast application for reducing nitrogen (N) loss from lowland rice is well established. In upland agricultural systems, rainfall and\\/or the application and loss of irrigation water from soil systems may regulate urea N transformations and gaseous losses, depending on the method of fertilizer application

  7. Hoja 5 Calculo I Primero de Ingenieria Informatica Curso 20112012 Sobre funciones inversas

    E-print Network

    Fernández Gallardo, Pablo

    Hoja 5 C´alculo I Primero de Ingenier´ia Inform´atica Curso 2011­2012 Sobre funciones inversas 1. Halla una f´ormula para la derivada segunda de la funci´on inversa. 2. Se llama arco seno hiperb´olico a la inversa de la funci´on f : R - R definida por la f´ormula f(x) = (ex - e-x)/2. Explica por qu´e el

  8. Premissas histórico-socioculturais sobre a família brasileira em função do sexo e da idade

    Microsoft Academic Search

    Eveline Maria Leal Assmar; Maria Cristina Ferreira; Heliane Novaes; Mariana Tomaz

    2000-01-01

    Resumo Segundo a abordagem etnopsicológica, as premissas histórico-socioculturais, que constituem crenças inquestionáveis consensualmente aceitas por um grupo social, desempenham papel chave na compreensão do comportamento individual. Apoiando-se nessa perspectiva, investigou-se a influência do sexo e idade no grau de adesão a premissas sobre a família brasileira. A amostra compreendeu 393 sujeitos de ambos os sexos, distribuídos em quatro faixas etárias,

  9. Filantropía no asistencialista: La reseña de Demetrio Aranovich sobre Colonia Mauricio

    Microsoft Academic Search

    Edgardo Zablotsky

    2012-01-01

    Colonia Mauricio se estableció en 1891 sobre las primeras tierras adquiridas por la Jewish Colonization Association (J.C.A.) en nuestro país y, por lejos, las más fértiles. La Memoria Oficial de la J.C.A. de 1904 llegó a calificarla como la más próspera de las colonias. Sin embargo, Colonia Mauricio se desintegró rápidamente. ¿Qué sucedió? Comprender las razones por las cuales se

  10. PROYECTO DE CONVENCIN SOBRE LA PREVENCIN Y LA PENALIZACIN DEL DELITO DE DESARROLLO,

    E-print Network

    Sussex, University of

    , ADQUISICI�N, ALMACENAMIENTO, RETENCI�N, TRANSFERENCIA O EMPLEO DE ARMAS BIOL�GICAS O QUÍMICAS DRAFT CONVENTION, TRANSFERENCIA O EMPLEO DE ARMAS BIOL�GICAS O QUÍMICAS PREÁMBULO Los Estados Partes en la presente Convención, Recordando que el Protocolo de Ginebra de 1925, la Convención sobre Armas Biológicas de 1972 y la Convención

  11. Conferencia de Consenso sobre la braquiterapia en cáncer de mama en estadios iniciales

    Microsoft Academic Search

    F. Guedea; L. Arribas; F. Casquero; C. Cinos; V. Crispin; A. Gracia; J. L. Guinot; I. Monteiro-Grillo; V. Munoz; J. Pera; A. Polo; L. Linares; H. Marsiglia; J. J. Mazeron

    2003-01-01

    Resumen  Existe una controversia desde hace décadas sobre el papel de la sobredosis después de la radioterapia externa en el tratamiento\\u000a conservador de cáncer de mama inicial. En el caso de comparar la supervivencia y el control local de un tratamiento conservador\\u000a frente a la mastectomía, existen en la literatura 5 estudios randomizados1–5 y un metaanálisis6 que demuestran que la radioterapia

  12. EDUCAÇÃO SEXUAL NO 1ºCEB: PERCEPÇÕES DOS PROFESSORES SOBRE AS SUAS DIFICULDADES EM ÁREAS E TÓPICOS ESPECÍFICOS

    Microsoft Academic Search

    Zélia ANASTÁCIO; Graça S. CARVALHO; Pierre CLÉMENT

    Resumo Pretendeu-se identificar as percepções de professores de 1ºCEB, sobre as suas dificuldades sobre a educação sexual e analisar alguns factores individuais com influência nestas concepções. Os dados recolhidos por um questionário construído para o efeito foram tratados estatisticamente no programa SPSS. Os resultados sugerem maiores dificuldades na área de expressões da sexualidade e menores na de relações interpessoais. Como

  13. Tendências De Teses e Dissertações Sobre Educação em Astronomia No Brasil

    NASA Astrophysics Data System (ADS)

    Bretones, Paulo Sergio; Megid Neto, Jorge

    2005-07-01

    Apresentam-se os resultados de uma pesquisa do tipo estado da arte sobre teses e dissertações defendidas no Brasil e relativas ao ensino de Astronomia, com objetivo de identificar essa produção e conhecer as principais tendências da pesquisa nesse campo. Foram localizadas 13 dissertações de mestrado e 3 teses de doutorado, as quais foram estudadas em função dos seguintes aspectos: isntituição, ano de defesa, nível escolar abrangido no estudo, foco temático do estudo e gênero de trabalho acadêmico. Pretende-se assim colaborar com a divulgação ampla da produção acadêmica na área. Ao mesmo tempo o estudo possibilita, a partir de investigações decorrentes, apontar as contribuições dessa produção para o ensino e sinalizar com necessidades a serem supridas por futuras pesquisas.

  14. Memorias del Segundo Simposio Internacional Sobre Polticas, Planificacin y Economa de los Programas de Proteccin Contra Incendios Forestales: Una Visin Global Memorias del Segundo Simposio Internacional Sobre Polticas, Planificacin y Economa de los Progra

    E-print Network

    Standiford, Richard B.

    entorno actual y el futuro previsible del entorno australiano de gestión de incendios. Este proyecto se) que se derivan de los incendios forestales es un ingrediente clave para poder tomar decisiones sobre el método de valoración se fundamente en los principios de economía, y no en las pérdidas financieras

  15. Memorias del Segundo Simposio Internacional Sobre Polticas, Planificacin y Economa de los Programas de Proteccin Contra Incendios Forestales: Una Visin Global Memorias del Segundo Simposio Internacional Sobre Polticas, Planificacin y Economa de los Progra

    E-print Network

    Standiford, Richard B.

    alcanzan, ponen en peligro la pervivencia de los sistemas forestales. Los estudios sobre el impacto del obtenidas, ni se ha comprobado la evolución posterior de los paisajes afectados que, en algunos casos habrán. Un estudio de lo sucedido en zonas anteriormente quemadas puede ser interesante como instrumento de

  16. Costos laborales y no laborales y su impacto sobre el desempleo, la duración del desempleo y la informalidad en Colombia, 1980-2007

    Microsoft Academic Search

    Fabio Sánchez; Valentina Duque; Mauricio Ruíz

    2009-01-01

    Este documento describe y analiza la evolución del desempleo desde 1980 estimando el efecto de los costos laborales no salariales (parafiscales) y salario mínimo sobre la tasa y duración del desempleo así como el efecto de los costos mencionados sobre la informalidad. Los resultados obtenidos muestran que aumentos en las regulaciones laborales aumentan la informalidad, el desempleo y su duración.

  17. Efectos de las variaciones en el tiempo de trabajo sobre la ocupación adolescente y juvenil en el sector industrial: un análisis regional

    Microsoft Academic Search

    Ángel Luis Martin Roman; Alfonso Moral de Blas

    2002-01-01

    RESUMEN El objetivo de este trabajo es doble. En primer lugar, se pretende hacer una racionalización teórica de los efectos de las modificaciones del tiempo de trabajo sobre el empleo. En segundo lugar, se lleva a cabo un análisis empírico de estas ideas sobre la ocupación laboral de los grupos de menor edad: adolescentes y jóvenes. El motivo de analizar

  18. O IMPACTO DA ARMAZENAGEM DA SOJA NA PROPRIEDADE RURAL SOBRE OS PREÇOS DE MERCADO DA COMMODITY E NA AMPLIAÇÃO DA CAPACIDADE DE ARMAZENAMENTO

    Microsoft Academic Search

    Lenio Tramontina; Edson Talamini; Gabriel Murad Velloso Ferreira

    2008-01-01

    O presente trabalho consiste em um estudo realizado com objetivo principal de avaliar o impacto do aumento na capacidade de armazenagem de soja na propriedade rural, sobre o nível de preços da commodity e deste sobre a viabilidade de novos incrementos na capacidade de armazenagem. Para o seu desenvolvimento aplicou-se um estudo exploratório, baseado no levantamento e análise de dados

  19. Estudos sobre religião e saúde mental realizados no Brasil: histórico e perspectivas atuais Brazilian studies on religion and mental health: history and current perspectives

    Microsoft Academic Search

    PAULO DALGALARRONDO

    Resumo Contexto: Há mais de um século, vários pesquisadores brasileiros têm estudado as relações entre religiosidade e transtornos mentais, mas estes trabalhos são pouco conhecidos atualmente. Objetivos: apresentar um panorama e uma análise crítica da produção sobre saúde mental e religião no Brasil. Métodos: análise das pesquisas de relevância histórica, assim como investigações contemporâneas sobre o tema saúde mental e

  20. Estudios de la Facultad de Derecho Informacin sobre PREINSCRIPCIN y MATRCULA para el curso 2014-2015

    E-print Network

    Escolano, Francisco

    Estudios de la Facultad de Derecho Información sobre PREINSCRIPCIÓN y MATRÍCULA para el curso 2014 · DERECHO · DERECHO-ADE (DADE) · DERECHO-CRIMINOLOGÍA (DECRIM) · GESTIÓN Y ADMINISTRACIÓN PÚBLICA Universitario en Derecho Ambiental y de la Sostenibilidad · Doctorado en Derecho · Curso de experto en Derecho

  1. USO Y MANEJO DEL FERTILIZANTE ORGÁNICO GALLINAZO. EFECTOS SOBRE EL AMBIENTE Y LA SALUD DE LA POBLACIÓN RURAL

    Microsoft Academic Search

    José Arturo Bastidas Romero; Núcleo Universitario; Rafael Rangel-Trujillo

    2007-01-01

    Las condiciones ambientales cambian constante y rápidamente en los espacios geográficos rurales, en parte porque el hombre actúa sobre ellos aplicando innovaciones tecnológicas y sociales para beneficio propio acarreando consecuencias imprevisibles. Estos efectos imprevistos alteran la vida de los habitantes rurales, a menudo de manera desfavorable. Las perturbaciones causadas por el individuo en el espacio rural pretendiendo cambiarlo y adaptarlo

  2. Para mayor informacin sobre E-Verify, favor ponerse en contacto con la oficina del DHS llamando al

    E-print Network

    Para mayor información sobre E-Verify, favor ponerse en contacto con la oficina del DHS llamando al necesario, al Departamento de Seguridad Nacional (DHS), información obtenida del Formulario I-9 contacto con la oficina del SSA y, o el DHS antes de tomar una determinación adversa en contra suya

  3. Enseñar economía mediante estrategias de investigación escolar. Estudio de caso sobre las concepciones y prácticas del profesorado

    Microsoft Academic Search

    Gabriel Travé González; Francisco José Pozuelos Estrada

    2008-01-01

    Se presenta en este trabajo un análisis de caso realizado a lo largo de dos años en un centro de primaria de educación compensatoria en el que se reflexiona sobre las percepciones y los obstáculos que encuentra el profesorado cuando diseña y desarrolla en la práctica una unidad didáctica de contenido socioeconómico siguiendo enfoques de investigación escolar.

  4. Meu trabalho como ornitloga abrange reas do comportamento animal, distribuies geogrficas e estudos sobre ecologia de populaes, incluindo biologia

    E-print Network

    Hrbek, Tomas - Department of Biology, Universidad de Puerto Rico

    família Pipridae, como modelos. Estas aves frugívoras ocorrem somente em florestas Neotropicais, e formam de estudos sobre o comportamento de corte em si, estes pássaros são modelos para estudos de dinâmica populacional em sistemas poligâmicos, além de estudos de interações ecológicas diversas, como a utilização do

  5. Estudio muestra la importancia de las conversaciones tempranas sobre el cuidado en la etapa final de la vida

    Cancer.gov

    Las conversaciones sobre cuidados paliativos y atención al final de la vida a menudo se retrasan hasta tarde en la vida de un paciente, si es que se llega a hablar de estos temas. Las conversaciones tempranas a este respecto ayudan a asegurar un cuidado en la etapa final de la vida más acorde con las preferencias de los pacientes.

  6. Las normas de derecho blando: un análisis jurídico de los efectos de la reserva de instrucción sobre el derecho territorial

    Microsoft Academic Search

    Alexander Sánchez Pérez

    La autonomía territorial ha venido experimentado un lento proceso de “(de)constitucionalización” debido al uso inadecuado de lo que denominamos reserva de instrucción administrativa, sobre la que descansan las normas blandas cuyos efectos no se acondicionan al sistema de fuentes y su utilización ha terminado por provocar una rebeldía de la administración pública al principio de legalidad: circulares, protocolos, directivas, instrucciones,

  7. Instrucin sobre o recoecemento de cursos de idiomas realizados en universidades estranxeiras baixo programas de mobilidade de estudantes

    E-print Network

    Fraguela, Basilio B.

    Instrución sobre o recoñecemento de cursos de idiomas realizados en universidades estranxeiras créditos que poderán ser obxecto de recoñecemento. Este límite será o correspondente a un curso completo da titulación que estea a cursar o/a estudante para unha estadía de curso completo ou equivalente para estadías

  8. MARCO TEÓRICO PARA EL ESTUDIO SOBRE LA EXPRESIÓN HISTÓRICA DE LA PLANEACIÓN ESTRATÉGICA DE LA PREVENCIÓN DELICTIVA (I)

    Microsoft Academic Search

    Dager Aguilar Avilés; Abdiel Llerena Martínez

    2010-01-01

    El Presente trabajo aborda algunos resultados parciales cualitativos de una investigación realizada en el barrio capitalino cubano “la Corea” a partir del experimento investigativo sobre nuestras variables independientes y la evaluación del comportamiento delictivo en esta zona. En este sentido se abordan los fundamentos históricos de la Criminología como vía posible de solución a las problemáticas y deficiencias de la

  9. Direito ao adicional noturno deve incidir sobre as horas prorrogadas O Tribunal Superior do Trabalho Assessoria de Comunicao Social A

    E-print Network

    Floeter, Sergio Ricardo

    Direito ao adicional noturno deve incidir sobre as horas prorrogadas O Tribunal Superior do a jurisprudência do TST (Súmula nº 60, item II) "não deixa a mínima dúvida de que o direito ao adicional noturno, obteve no Tribunal Regional do Trabalho da 4ª Região (RS) o reconhecimento ao direito de receber com o

  10. "O IDOSO PORTADOR DE TRANSTORNOS NEUROSPIQUITRICOS E SEU DIREITOS" XXV CURSO E CICLO DE DEBATES SOBRE NEUROPSIQUIATRIA GERITRICA

    E-print Network

    Chaimowicz, Luiz

    "O IDOSO PORTADOR DE TRANSTORNOS NEUROSPIQUIÁTRICOS E SEU DIREITOS" XXV CURSO E CICLO DE DEBATES PORTADOR DE TRANSTORNOS NEUROSPIQUIÁTRICOS E SEU DIREITOS" XXV CURSO E CICLO DE DEBATES SOBRE Medicina da UFMG Velhice como direito 27/06 Dra. Karla Cristina Giacomin Presidente, Conselho Nacional dos

  11. TEORA DE LOS GRANDES ESPACIOS DEMOCRACIA COSMOPOLITA: NOTAS BREVES SOBRE LAS TEORAS DEL ORDENAMIENTO ESPACIAL CONTEMPORNEO DESDE UNA

    E-print Network

    Paris-Sud XI, Université de

    TEORÍA DE LOS GRANDES ESPACIOS � DEMOCRACIA COSMOPOLITA: NOTAS BREVES SOBRE LAS TEORÍAS DEL Cosmopolita y La teoría de los Grandes Espacios. El objetivo último del artículo consiste en ofrecen un modelo hacia el espacio latinoamericano. Palabras Clave: Democracia Cosmopolitita, Teoría del gran espacio

  12. INFORMAO CCPG/002/2011 Tendo em vista a necessidade de reviso da regulamentao das normas sobre o

    E-print Network

    de Aguiar, Marcus A. M.

    INFORMA��O CCPG/002/2011 Tendo em vista a necessidade de revisão da regulamentação das normas sobre deverão obrigatoriamente conter: I. Capa com formato único ou em formato alternativo que deverá conter as respectivas assinaturas. V. Resumo e abstract em português e em inglês (ambos com no máximo 500 palavras). VI

  13. Tendências de teses e dissertações sobre ensino de astronomia no Brasil

    NASA Astrophysics Data System (ADS)

    Bretones, P. S.; Megid Neto, J.

    2003-08-01

    Neste trabalho são apresentados os resultados de uma pesquisa do tipo estado da arte sobre teses e dissertações defendidas no Brasil e relativas ao ensino de Astronomia. Teve por objetivo identificar essa produção e conhecer as principais tendências da pesquisa nesse campo. O procedimento inicial consistiu de um levantamento bibliográfico junto ao Centro de Documentação em Ensino de Ciências (CEDOC) da Faculdade de Educação da UNICAMP e ao Banco de Teses da CAPES disponível na Internet. Foram localizadas 13 dissertações de mestrado e 3 teses de doutorado, as quais foram estudadas em função dos seguintes aspectos: instituição, ano de defesa, nível escolar abrangido no estudo, foco temático do estudo e gênero de trabalho acadêmico. Deste conjunto de pesquisas, 13 (81,3%) delas foram defendidas a partir da segunda metade dos anos 90, indicando uma preocupação mais recente com temas relativos ao ensino de Astronomia no conjunto da produção acadêmica em programas de pós-graduação no Brasil. Verificou-se que 43,7% dos trabalhos foram produzidas na USP e 18,8% na UNICAMP. Quanto ao nível escolar abrangido nos estudos, predominaram os estudos direcionados ao Ensino Fundamental de 5a a 8a séries (62,5%). No que diz respeito ao foco temático das pesquisas, as principais tendências voltaram-se: 56,3% para Conteúdo e Método; 43,8% para Concepções do Professor; 37,5% para Currículo e Programas; 37,5% para Recursos Didáticos. Quanto ao gênero de trabalho acadêmico, verificou-se que 43,8% são de Pesquisa Experimental e 31,3% de Pesquisa de Análise de Conteúdo. Estudos de revisão bibliográfica como este visam colaborar com a divulgação ampla da produção acadêmica em determinada área, traçando algumas de suas tendências. Ao mesmo tempo possibilita, a partir de investigações decorrentes, apontar as suas contribuições para o ensino e sinalizar com necessidades a serem supridas por futuras pesquisas.

  14. Los Suelos y la agricultura en el municipio de Candelaria 

    E-print Network

    Banco de Fomento Agrí cola e Industrial de Cuba. Division Agrí cola. Departamento de Diversificací on

    1957-01-01

    ?mero de cuenta de su banco si desea que los fondos para asistencia luego un desastre se depositen directamente en su cuenta. Obtenci?n de asistencia ante un desastre Se le entregar? un n?mero de identificaci?n de inscripci?n de FEMA. Una vez que este... de comunicarse con usted. En caso de que alguien que diga ser oficial de FEMA le solicite este n?mero, no se lo d?. Dado que los representantes oficiales de FEMA ya tienen este n?mero, debe solicitarles la identificaci?n. Se le enviar? una copia...

  15. El precio de la electricidad y la política de cambio climático: ¿qué papel puede jugar un impuesto sobre el carbono en España? \\/The Price of Electricity and Climate Change Policy: What Role May a Carbon Tax Play in Spain?

    Microsoft Academic Search

    MIGUEL BUÑUEL GONZÁLEZ

    2011-01-01

    La política de cambio climático basada en las energías renovables es compatible con la reducción del déficit tarifario del sector eléctrico trasladando a los Presupuestos Generales las primas que subvencionan aquellas energías. Dicha política se potenciaría con un impuesto sobre el carbono, que podría generar una recaudación mayor que las primas al régimen especial eléctrico. La simulación del efecto sobre

  16. Revista Brasileira de Meteorologia, v.23, n.1, 58-72, 2008 Variabilidade do regime de mones sobre o brasil: o clima presente e

    E-print Network

    Carvalho, Leila M. Vespoli de

    o brasil: o clima presente e projeções para um cenário com 2xco2 usando o modelo miroc. Rodrigo José) sobre o Brasil com particular interesse na região do cerrado brasileiro. O início, final e total de bioma primitivo que em sua origem cobria grande parte do centro-oeste do Brasil, parte do sudeste e

  17. Desempleo, inmigración y su impacto sobre el desempleo en Medellín: Análisis de las encuestas de calidad de vida-Medellín, 2004-2005

    Microsoft Academic Search

    Donald J. Robbins

    2006-01-01

    Resumen: este estudio se enfoca en el patrón y en las causas del desempleo en Medellín; en el patrón y la velocidad de inmigración hacia Medellín y en el impacto de la inmigración sobre la tasa de desempleo para los años 2004 y 2005. El estudio se realiza con base en el análisis de la Encuesta de Calidad de Vida

  18. Extensin de los mtodos Hop-by-Hop, CR-LDP y RSVP-TE para Multicast IP sobre MPLS1

    E-print Network

    Ortega, Eusebi Calle

    Extensión de los métodos Hop-by-Hop, CR-LDP y RSVP-TE para Multicast IP sobre MPLS1 Yezid Donoso presents the functioning of IP multicast working on MPLS for the traffic without quality of service is carried out. Keywords:MPLS, Multicast IP, QoS Resumen En este artículo se presentan el funcionamiento de

  19. DIMENSIONALIDAD DE LA RESPONSABILIDAD SOCIAL EMPRESARIAL PERCIBIDA Y SUS EFECTOS SOBRE LA IMAGEN Y LA REPUTACIÓN: UNA APROXIMACIÓN DESDE EL MODELO DE

    Microsoft Academic Search

    ALEJANDRO ALVARADO HERRERA; MARÍA WALESSKA SCHLESINGER DÍAZ

    2008-01-01

    La literatura de marketing sugiere que las acciones y programas de responsabilidad social empresarial podrían mejorar la imagen y la reputación de las empresas ante los ojos de sus consumidores y ser una importante fuente de ventaja competitiva para las mismas. Sin embargo, poco se sabe acerca las percepciones de estos stakeholders al respecto y sobre sus efectos en dichas

  20. La Percepción de los Agricultores sobre el Problema del Tizón Tardío o Rancha (Phytophthora infestans) su Manejo: Estudio de Casos en Cajamarca, Perú

    Microsoft Academic Search

    Oscar Ortiz; Paul Winters; Hugo Fano

    1999-01-01

    Los agricultores que cultivan papa en zonas tropicales montañosas enfrentan varios problemas que limitan la productividad y producción. Sin embargo, poco se conoce sobre los efectos del tizón tardío, el conocimiento de los agricultores y el manejo de esta enfermedad a nivel de campo en países en desarrollo. Este estudio se llevó a cabo en Cajamarca, Perú, durante la campaña

  1. FACULTDAD DE CIENCIAS DE LA SALUD DE LA UNIVERSIDAD DE ALICANTE TTULO: Seminario sobre "Divulgacin de conocimientos en ciencias de la nutricin"

    E-print Network

    Escolano, Francisco

    FACULTDAD DE CIENCIAS DE LA SALUD DE LA UNIVERSIDAD DE ALICANTE TÍTULO: Seminario sobre "Divulgación de conocimientos en ciencias de la nutrición" DESTINADO A: Estudiantes de Grado de Nutrición:00 a 18:00. LUGAR: Salón de grados de la Facultad de Ciencias de la Salud de la Universidad de Alicante

  2. El Observatori de Bioètica i Dret y la Càtedra UNESCO de Bioètica de la Universitat de Barcelona presentan un nuevo libro sobre la dignidad humana

    Microsoft Academic Search

    Parc Científic de Barcelona

    2009-01-01

    Con la publicación de este libro el Observatori conmemora su 10º aniversario y el 15º de la creación del Máster en Bioética y Derecho\\u000aSe trata de un trabajo inédito, colectivo y multidisciplinar, que analiza cada uno de los artículos de la Declaración Universal sobre Bioética y Derechos Humanos de la UNESCO

  3. EFECTO DE DOS MÉTODOS DE CONGELACIÓN SOBRE LA VIABILIDAD ESPERMÁTICA DE SEMEN DE VERRACO EFFECT OF TWO FREEZING METHODS ON SPERM VIABILITY OF BOAR SEMEN

    Microsoft Academic Search

    El objetivo del presente trabajo fue evaluar el efecto de dos métodos de congelación sobre la viabilidad espermática de semen de verraco. Se utilizaron seis eyaculados (dos por macho), de tres verracos adultos de las razas Hampshire, Duroc y Landrace. Se evaluó el volumen, motilidad y concentración espermática de cada eyaculado. Posterior- mente, el semen fue diluido con solución BTS

  4. Un estudio sobre la enseñanza de la historia, la geografía y la educación cívica en la escuela elemental en Francia: temas, métodos y preguntas

    Microsoft Academic Search

    François Audigier

    2002-01-01

    Este artículo describe y analiza las diferentes etapas de una investigación sobre la enseñanza de la historia, de la geografía y de la educación cívica realizada en Francia entre 1997 y 2000. Su intención es mostrar las decisiones teóricas y prácticas que se han tenido que asumir, los problemas que se han presentado y los dispositivos y los métodos aplicados.

  5. Genesis of petroduric and petrocalcic horizons in Latinamerica volcanic soils

    NASA Astrophysics Data System (ADS)

    Quantin, Paul

    2010-05-01

    Introduction. In Latinamerica, from Mexico to Chile, there are indurated volcanic soils horizons, named 'tepetate' in Mexico or cangahua in the Andes Mountains. Apart from original volcanic tuffs, these horizons were produced by pedogenesis: either through a former weathering of volcanic ash layers into fragic and later to petrocalcic horizons; or after a former soil formation through a second process of transformation from clayey volcanic soils to silicified petroduric horizons. This oral presentation will briefly deal with the formation of petroduric horizons in Mexico and petrocalcic horizon in Ecuador. Petroduric horizon genesis in Mexico. A soil climato-toposequence, near to Veracruz (Rossignol & Quantin, 1997), shows downwards an evolution from a ferralic Nitisol to a petroduric Durisol. A Durisol profile comports these successive horizons: at the top A and Eg, then columnar Btg-sim, laminar Bt-sim , prismatic Bsim, plinthite Cg, over andesite lava flow. Among its main features are especially recorded: clay mineralogy, microscopy and HRTEM. These data show: an increase in cristobalite at the expenses of 0.7 nm halloysite in Egsiltans, laminar Bt-sim, around or inside the columns or prisms of Btg-sim and Bsimhorizons. HRTEM (Elsass & al 2000) on ultra thin sections reveals an 'epigenesis' of clay sheets by amorphous silica, to form successively A-opal, Ct-opal and microcrystalline cristobalite. From these data and some groundwater chemical analyses, a scenario of duripan formation from a past clayey Nitisol is inferred: clay eluviation-illuviation process? alternate redoximorphy? clay degradation, Al leaching and Si accumulation, to form successively A-opal, Ct-opal and cristobalite. Petrocalcic horizon genesis in Ecuador. A soil climato-toposequence on pyroclastic flows, near to Bolivar in Ecuador (Quantin & Zebrowski, 1997), shows downwards the evolution from fragic-eutric-vitric Cambisols to petrocalcic-vitric Phaeozems, at the piedmont under semi-arid climate. A complex soil profile of petrocalcic Phaeozem, derived from 4 pyroclastic layers, shows among its successive horizons: in layer 3 the 'upper cangahua' with petrocalcic features and in layer 4 the 'lower cangahua' with hard fragipan properties. The features of the petrocalcic cangahua differ from a Mexican fragipan (Hidalgo & al 1997) by: a hard calcrete, higher alkalinity, stability in water after HCl and NaOH treatment, 2-4% of 'free silica'. The macro and micro-morphology shows: the laminar calcite crust, at the top of cangahua, with alternate micrite-sparite layers; downwards, microcalcite infillings in the voids of a prismatic structure, invading the groundmass by epigenesis of clay sheets, together whith microcrystalline opal. From these data this scenario is inferred: after a former weathering of volcanic glass to form a clayey matrix, as well amorphous silica and microcalcite coatings and infillings, then a second process, perhaps due to drier climate, produced the laminar crust formation, by invasion of microcalcite in the matrix. Conclusion. The petrocalcic horizon in Ecuador was produced by two processes: from a former phase of weathering giving a fragic horizon to a second producing the accumulation of calcite and some opal over and inside the matrix, due to climate change. The petroduric horizon in Mexico, is the product of a very complex soil transformation, from a former clayey Nitisol, through four successive processes: clay eluviation-illuviation, alternate redoximorphy, clay degradation, finally a progressive silicification over and inside the groundmass, probably due to pedoclimate change. References F. Elsass, D. Dubroeucq & M. Thiry. 2000. Clay Minerals, 35, 477-489. C. Hidalgo, P. Quantin & F. Elsass. 1997. Memorias del III Simposio Internacional sobre Suelos volcanicos endurecidos (Quito 1996), p. 65-72. - P. Quantin & C. Zebrowski. 1997. idem, p. 29-47.- J.P. Rossignol & P. Quantin. 1997. idem, p. 73-82.

  6. EFEITO INSETICIDA DE AMIDAS NATURAIS DE Piper E DO DERIVADO SINTÉTICO TETRAIDROPIPERINA SOBRE Lucilia cuprina (DIPTERA: CALLIPHORIDAE) E Musca domestica (DIPTERA: MUSCIDAE)

    Microsoft Academic Search

    ÉLIO BARBIERI JUNIOR; CLEBER B. BARRETO JUNIOR; ROBERTA CRISTIANE RIBEIRO; VÍTOR HUGO; S. DE OLIVEIRA; MARCO EDILSON FREIRE DE LIMA; GONZALO E. MOYA-BORJA

    6 ABSTRACT:- BARBIERI JUNIOR, E.; BARRETO JUNIOR, C.B.; RIBEIRO, R.C.; OLIVEIRA, V.H.S. DE; LIMA, M.E.F. DE; MOYA-BORJA, G.E. (Insecticide effects of natural amides from Piper and of the synthetic derivative tetrahydropiperine on Lucilia cuprina (Diptera: Calliphoridae) and Musca domestica (Diptera: Muscidae)). Efeito inseticida de amidas naturais de Piper e do derivado sintético tetraidropiperina sobre Lucilia cuprina (Diptera: Calliphoridae) e Musca

  7. Contributed Paper Effects of Exurban Development and Temperature

    E-print Network

    Turner, Monica G.

    : Las din´amicas de uso de suelo y gradientes clim´aticos tienen grandes efectos sobre muchos sistemas construcciones y a la elevaci´on. Usamos modelos de ocupaci´on para determinar las asociaciones de 36 especies de densidad de construcci´on y la temperatura media fueron incluidas en los principales modelos de ocupaci

  8. On-Site Wastewater Treatment Systems: Mound Systems (Spanish) 

    E-print Network

    Lesikar, Bruce J.

    2002-04-18

    general, un tanque s?ptico; un tanque bomba para dosificar las aguas negras; y un campo elevado de drenaje con un sistema de distribuci?n de presi?n. El mont?culo mismo es una estructura en capas formada de: a19 Una capa de arena colocada sobre el suelo...

  9. Por ms de 30 aos, el programa de CU Wizards ha presentado shows mensuales GRATIS que entretienen e informan a los nios sobre las maravillas de la ciencia. Estos shows interactivos se

    E-print Network

    Lineberger, W. Carl

    e informan a los niños sobre las maravillas de la ciencia. Estos shows interactivos se presentan una Harvey "Ilusión y Realidad: La Ciencia de la Percepción" Duane G1B30 10/18/2014 Prof. Veronica Bierbaum

  10. Resolver los siguientes ejercicios: (1) En cada uno de los siguientes incisos, determinar si la funcion que se da es uno a uno, sobre

    E-print Network

    Aíza, Ricardo Gómez

    , determinar si la funci´on que se da es uno a uno, sobre o biyectiva: (a) f (x) = 3 (c) f (x) = ax + b, con a, b R (e) y = 1 x-1 (b) f (x) = 2x - 1 (d) y = 1 x (f) y = x (2) Una funci´on f : R R es par si f siguientes incisos, hacer un dibujo de la gr´afica de la funci´on que se da y determinar si es una funci´ones

  11. Experiencias sobre el impacto del Programa de Formación en Ética de la Investigación Biomédica y Psicosocial en el ámbito de la salud mental y la investigación conductual.

    PubMed

    Barrios, Liliana Mondragón

    2012-01-01

    El propósito de este trabajo es presentar el impacto y la integración que los conocimientos adquiridos en el Programa Internacional de Formación en Ética de la Investigación Biomédica y Psicosocial de la Universidad de Chile han tenido en mi experiencia profesional, en el ámbito de la investigación psicosocial en un Instituto de Salud de México. Para este objetivo, expondré tres áreas en las cuales se ha podido evidenciar tal impacto: trabajo en los comités de ética, desarrollo de programas de académicos en bioética e investigación y publicación sobre ética y bioética. El motivo que me llevó a incursionar en el Programa fue que su enseñanza vincula la investigación psicosocial con la ética y la bioética, lo cual me permitió dirigir este tipo de reflexión hacia problemas como violencia, suicidio, adicciones, depresión y salud mental, y a nuevos campos como los estudios comunitarios, con poblaciones en riesgo o vulnerables, en los cuales las diversas implicaciones son difíciles de indagar. PMID:22754085

  12. Experiencias sobre el impacto del Programa de Formación en Ética de la Investigación Biomédica y Psicosocial en el ámbito de la salud mental y la investigación conductual

    PubMed Central

    Barrios, Liliana Mondragón

    2012-01-01

    El propósito de este trabajo es presentar el impacto y la integración que los conocimientos adquiridos en el Programa Internacional de Formación en Ética de la Investigación Biomédica y Psicosocial de la Universidad de Chile han tenido en mi experiencia profesional, en el ámbito de la investigación psicosocial en un Instituto de Salud de México. Para este objetivo, expondré tres áreas en las cuales se ha podido evidenciar tal impacto: trabajo en los comités de ética, desarrollo de programas de académicos en bioética e investigación y publicación sobre ética y bioética. El motivo que me llevó a incursionar en el Programa fue que su enseñanza vincula la investigación psicosocial con la ética y la bioética, lo cual me permitió dirigir este tipo de reflexión hacia problemas como violencia, suicidio, adicciones, depresión y salud mental, y a nuevos campos como los estudios comunitarios, con poblaciones en riesgo o vulnerables, en los cuales las diversas implicaciones son difíciles de indagar. PMID:22754085

  13. ENCUADRES NOTICIOSOS EN LA INFORMACIÓN PERIODÍSTICA SOBRE LOS RECURSOS HÍDRICOS Y SUS EFECTOS EN LA PERCEPCIÓN Y ACTITUDES HACIA LA PARTICIPACIÓN CÍVICA EN LA POLÍTICA HIDROLÓGICA: UN ESTUDIO EXPERIMENTAL

    Microsoft Academic Search

    Lifen Cheng; Darío Paéz; Juan José Igártua; María Luisa Humanes

    Resumen Existen muchos factores que pueden explicar la razón por la que los ciudadanos están más o menos atentos a un determinado tema social de actualidad como la cuestión del agua y su relación con el medio ambiente (Shanahan, Morgan, y Stenbjerre, 1997). Mucho de lo que sabe el público sobre dicho tema probablemente proviene de los medios de comunicación,

  14. EARLY GROWTH AND FLORISTIC DIVERSITY OF HYBRID ASPEN (POPULUS X WETTSTEINII HÄMET-AHTI) PLANTATIONS ON A RECLAIMED OPENCAST OIL SHALE QUARRY IN NORTH-EAST ESTONIA

    Microsoft Academic Search

    A. TULLUS; T. SOO; H. TULLUS; A. VARES; A KANAL; E ROOSALUSTE

    2008-01-01

    The early growth of the trees, foliar and soil properties, and floristic diversity were studied in 5-year-old hybrid aspen plantations in four sites: A1-levelled oil shale quarry spoil (Calcaric Regosol), A2-levelled quarry spoil covered with the mixture of removed former Calcaric Cambisol horizons, B1-former arable land on Calcaric Cambisol, Chromic Cambisol and Rendzic Leptosol, B2-former arable land on Mollic Planosol.

  15. Artículo reseña EL INJERTO HERBÁCEO: ALTERNATIVA PARA EL MANEJO DE PLAGAS DEL SUELO

    Microsoft Academic Search

    Farah María González; A. Hernández; A. Casanova; T. Depestre; Lucila Gómez; Mayra G. Rodríguez

    Vegetables grown under greenhouses are very affected the root-knot nematodes Meloidogyne spp. This pest causes considerable yield losses in that kind of facilities. Several management alternatives have been successfully used in the world; among them grafting is a cultural practice that constitutes an important component of the IPM systems on sheltered cultivation of Solanaceae (tomato, pepper and eggplant) and Cucurbitaceae

  16. PORTAINJERTOS de CIRUELO, CEREZO y ALBARICOQUERO desde la PERSPECTIVA de la REPLANTACIÓN y PATÓGENOS del SUELO

    Microsoft Academic Search

    Jorge PINOCHET; Joan TORRENTS; Agromillora Catalana; T. M Subirats; Antonio FELIPE

    This article presents updated information on replant problems associated with the performance of rootstocks for plum, cherry and apricot in Spain. The origin and causal agents for specific replant problems are discussed. Resistance and (or) tolerance traits against the main soilborne pests and diseases that are implicated in replant disease are presented. The provided information should be regarded as orientative

  17. Los Suelos y la agricultura en los municipios de Alquizar y de Güira de Melena 

    E-print Network

    Banco de Fomento Agrí cola e Industrial de Cuba. Division Agrí cola. Departamento de Diversificací on

    1957-01-01

    itself, breaks itself into bits, regroups itself, is an abundant, materna, pederastic femininity" (Marks and de Couitivron 98). The denial of logical unity in my narrative reflects Rain's rejection of the male principle, as typified by his father, a... contains many clearly contemporary details: Joy and his group of friends, who seem suspiciously "hippy" in appearance, speech, and manners (238); the "transmissions" heard by Rain in the woods, which include bits of current songs, nursery rhymes...

  18. INCUBACION ANAEROBICA DEL SUELO COMO DIAGNOSTICO DE LA RESPUESTA A NITROGENO DEL MAIZ BAJO SIEMBRA DIRECTA

    Microsoft Academic Search

    PA CALVIÑO; HE ECHEVERRÍA

    -1 then the yield increment = 72,5 - 1,38 Nan, if Nan > 48.mg kg -1 the yield increment = 6 %). Nan was related with the time (years) since the last pasture (r 2 = 0.39). These results suggest that Nan probably is associated with light carbon fractions and can be used to explain the response of maize to

  19. Estudio del comportamiento acustico de recubrimientos de suelo derivados de la madera

    Microsoft Academic Search

    Jose Maria Gadea Borrell

    2009-01-01

    This work describes a study of the vibroacoustic behaviour of laminate flooring and is partly accomplished by means of an experimental method somewhat simpler than that normally used at the present time and partly by a hybrid FEM-FDTD numerical method that reproduces the proposed experiment. The experimental configuration records the sounds emitted by laminate floors when impacted and the numerical

  20. RESPUESTA DEL TRIGO AL AGREGADO DE ZINC Y COBRE EN SUELOS DEL SUDESTE BONAERENSE

    Microsoft Academic Search

    SAINZ ROZAS; PA CALVIÑO; PA BARBIERI; M REDOLATTI; EEA INTA

    In the southeast of the Buenos Aires Province (Argentina) agricultural soils have been intensively used and wheat productivity increased in the last two decades. Therefore, nitrogen and phosphorus fertilization is an usual practice in wheat production. However, some micronutrients like zinc (Zn) or copper (Cu) considered not restrictive can be limiting for wheat under more intensive management practices. The objective

  1. INDICADORES DE CALIDAD FÍSICA EN SUELOS DE LA REGIÓN PAMPEANA NORTE DE ARGENTINA BAJO SIEMBRA DIRECTA

    Microsoft Academic Search

    LAURA FERRERAS; GUSTAVO MAGRA; PABLO BESSON; ESTEBAN KOVALEVSKI; FERNANDO GARCÍA

    2007-01-01

    SUMMARY Sustainable land use implies the conservation of soil properties associated both to fertility and tillage. Soil alterations induced by management may affect crop production since management practices influence organic matter distribution and nutrient dynamics, and also soil aggregation and porosity. The Argentinean Northern Pampa is one of the region of the world where soils have been subjected to an

  2. Producción de suelo industrial en la Comunidad de Madrid: expansión, dispersión y fragmentación del espacio industrial

    Microsoft Academic Search

    Javier GUTIÉRREZ PUEBLA

    This paper studies tbc evolution in the produetion of industrial areas in the Comunidad de Madrid. As apposed to the spatial concentration in the sixties and seventies (big industrial arcas in a few munícípa- lities), it has been observed during thc last years a trend towards expansian, dispersion and fragmenta- tion olthc industrial space(a great number of more diverse and

  3. Impactos de las regulaciones en los precios de suelo no urbanizado: caso de estudio Bogotá

    Microsoft Academic Search

    Oscar Borrero Ochoa; Carlos Morales Schechinger

    1970-01-01

    Las regulaciones urbanas en Latinoamérica que crean beneficios para los terratenientes en forma de mayores ganancias suelen ser bien recibidas, especialmente por los que tienen tierras donde se han concentrado más beneficios; por ejemplo, cuando los planes de zonificación autorizan la urbanización en un área pero la limitan en otra, o cuando los códigos de construcción estimulan un tipo de

  4. CoNoCIMIeNToS SoBRe VIH\\/SIDA Y PRÁCTICAS SeXUALeS De eSCoLAReS De TACNA, PeRÚ 2004

    Microsoft Academic Search

    Fresia Catacora-López; Javier Villanueva-Roque

    ReSUMeN Objetivo: Determinar el nivel de conocimientos sobre el VIH\\/SIDA y las prácticas sexuales de los escolares de 14 a 17 años de la ciudad de Tacna, Perú. Materiales y métodos: Estudio transversal realizado entre septiembre y noviembre del 2004, se realizó un muestreo probabilística bietápico por conglomerados en instituciones educativas nacionales y privadas. Se incluyeron 399 escolares que respondieron

  5. La ley 388 de 1997 en Colombia: algunos puntos de tensión en el proceso de su implementación

    Microsoft Academic Search

    María Mercedes Maldonado Copello

    1970-01-01

    La experiencia colombiana de expedición e implementación de la legislación de\\u000aordenamiento territorial y suelo constituye un buen ejemplo sobre el tipo de debates, tensiones\\u000ay resistencias que en la coyuntura se movilizan en América Latina en este aspecto crucial de la\\u000agestión urbana. Varias décadas de esfuerzos para contar con un marco constitucional y legal\\u000aque ha sentado bases

  6. Pósteres Sobre Animales y Matemáticas

    NSDL National Science Digital Library

    TERC

    2010-01-01

    Exponga estos pósteres en el salón o déjelos donde los chicos los puedan explorar. Los chicos buscan las respuestas en libros de consulta o en línea. Algunas respuestas pueden variar a medida que se vaya descubriendo nueva información. Disponibles en formato pdf y en Inglés.

  7. Constru»c~ao de conceitos de f¶‡sica moderna e sobre a natureza da ci^encia com o suporte da hiperm¶‡dia (Construction of concepts of modern physics and on the nature of science with the support of hypermedia)

    Microsoft Academic Search

    D. I. Machado; R. Nardi

    Apresentam-se os resultados de uma pesquisa sobre a constru»c~ao de conceitos de F¶‡sica Moderna e sobre a natureza da Ci^encia com o apoio da hiperm¶‡dia, que envolveu a produ»c~ao e avalia»c~ao de um software edu- cacional. A proposta didatica fundamentou-se na Teoria da Aprendizagem de Ausubel, em orienta»c~oes para a implementa»c~ao de sistemas hiperm¶‡dia educacionais e em abordagens derivadas da

  8. High School Students' Previous Knowledge about the Stars. (Spanish Title: Conocimientos Previos de Estudiantes de Secundaria Acerca de Las Estrellas.) O Conhecimento Prévio de Alunos do Ensino Médio sobre as Estrelas

    NASA Astrophysics Data System (ADS)

    Iachel, Gustavo

    2011-12-01

    Based on the readings of articles related to Astronomy Education published in Brazil, it was noticed a lack of research on previous knowledge of students about the physical characteristics of stars, a fact that motivated us to develop this study. Previous knowledge of 125 students (approximated 15 years old) constituted the study sample; data was collected through written questionnaires (Appendix A) for analysis. From the content analysis of these responses it was possible to achieve some inferences as, for example, many students have some difficult to develop an explanatory model on the functioning of a star; there are few who say that the stars have a certain length of existence; some students have said that stars have tips; few recognize that a star is formed by a mass of gas; some previous knowledge come from purely visual aspects; furthermore, some students do not have the habit of observing nature in detail. We see this research as a reference in which science teachers can recognize the importance of previous knowledge for practice teaching and acquire resources for planning their lessons. De la lectura de artículos relacionados con la Educación en Astronomía publicados en el Brasil, se encuentra una falta de investigaciones acerca del conocimiento previo de los estudiantes sobre las características físicas de las estrellas, hecho que nos motivó a desarrollar este estudio. Los datos analizados se obtuvieron al aplicar un cuestionario a 125 estudiantes de secundaria, para posteriormente realizar un análisis de contenido, tal cuestionario se presenta en el Anexo A. Al realizar el análisis de contenido de las respuestas obtenidas, fue posible hacer algunas inferencias, como por ejemplo; muchos estudiantes tienen dificultades para desarrollar un modelo explicativo acerca del funcionamiento de una estrella; pocos estudiantes dicen que las estrellas tienen un cierto tiempo de vida; algunos estudiantes imaginan que las estrellas tienen puntas; pocos reconocen que una estrella es formada por una masa de gas; varios conocimientos previos parten de aspectos puramente visuales; por otro lado, los estudiantes no tienen el hábito de observar la naturaleza detalladamente, entre otros problemas. Vemos esta investigación como una probable fuente de referencia en la que los profesores de ciencias pueden reconocer la importancia del conocimiento previo, y la forma como interfieren con su práctica de enseñanza, además de la adquisición de recursos para la planificación de sus clases. Com base em leituras de artigos relacionados ao ensino de Astronomia publicados no Brasil, verificou-se a inexistência de investigações sobre o conhecimento prévio de estudantes acerca das características físicas das estrelas, fato que nos motivou a desenvolver a pesquisa apresentada. Os conhecimentos prévios de 125 estudantes do primeiro ano do ensino médio constituíram os dados do estudo, os quais foram inferidos através da análise das respostas cedidas em questionários impressos (Apêndice A). A partir da análise de conteúdo dessas respostas tornou-se possível realizar algumas inferências como, por exemplo: vários estudantes possuem dificuldade em elaborar um modelo explicativo sobre o funcionamento de uma estrela; são poucos os que dizem que as estrelas possuem certo tempo de existência; alguns alunos as imaginam com pontas; poucos reconhecem que uma estrela é formada por uma massa de gás; vários conhecimentos prévios partem de aspectos meramente visuais; ainda assim, os estudantes não possuem o hábito de observar a natureza mais detalhadamente, entre outras. Vemos essa pesquisa como uma provável fonte de consulta na qual os professores de ciências poderão, além de reconhecer a importância dos conhecimentos prévios para o ensino e como eles interferem em sua prática, adquirir subsídios para o planejamento de suas aulas.

  9. COMPORTAMIENTO DE ALGUNAS PROPIEDADES DEL SUELO EN UNA SABANA DEL CHACO SEMIARIDO OCCIDENTAL BAJO DISTINTAS FRECUENCIAS DE FUEGO

    Microsoft Academic Search

    CC GONZALEZ; GA STUDDERT; C KUNST; A ALBANESI

    Soil properties related to carbon and nitrogen dynamics of a savanna of Elionurus muticus (Spreng) O. Kuntze under three different fire frequencies ('fire history') were compared at one point of time. Soil was described as a Torriorthentic Haplustoll. Fire frequencies were characterized as: high (one fire every year), medium or normal (one fire every 3-4 years), and low (one fire

  10. C ALCULO Y DISE ~NO ASISTIDO POR ORDENADOR DE TOMAS DE TIERRA CON MODELOS DE SUELO NO UNIFORMES

    E-print Network

    Colominas, Ignasi

    and design of substation grounding requires computing the distribu- tion of potential on the earth surface computation of substa- tion grounding systems in nonuniform soils is presented in this paper. The formulation |for reasons of human security| and the equivalent resistance of the earthing system |for reasons

  11. PATÓGENOS DEL SUELO EN EL CULTIVO DE PIMENTÓN EN LA ZONA BAJA DEL MUNICIPIO JIMÉNEZ, ESTADO LARA, VENEZUELA

    Microsoft Academic Search

    Yoleidy Escalona; Dorian Rodríguez; Nancy Contreras; Nixon Jiménez

    2006-01-01

    Soil pathogens in bell pepper grown at the low basin of the Jimenez county of Lara State, Venezuela Bell pepper (Capsicum annuum L.) is the fourth most cultivated vegetable in Venezuela. It is affected by several diseases being, the most important those caused by soil pathogens, such as wilt, yellowing and\\/or poor development, which are found in the basin of

  12. MODELO DE UTILIZACIÓN CEREAL-PASTO EN SISTEMAS DE PRODUCCIÓN DE SABANAS BIEN DRENADAS CON SUELOS ÁCIDOS EN VENEZUELA

    Microsoft Academic Search

    José L. Berroterán

    SUMMARY This paper proposes a management model for acid-soil savannas applicable to mixed farm systems, to make efficient use of the available forage throughout the year. The area of low- fertility soils in the Venezuelan savannas covers a surface of about 130,000 km 2. They have a mesoclimate with a pronounced rainy season and a dry season with hydric deficit,

  13. Medios de vida y dinámica del uso del suelo en los Territorios Indígenas Bribri y Cabécar de

    Microsoft Academic Search

    Matthew Whelan; Dietmar Stoian; D. Wulfhorst; Eduardo Somarriba; Gabriela Soto; Kees Prins

    The livelihoods and farm land use change in three zones with different access and basic services were studied in the indigenous territories of Bribri and Cabecar groups in Talamanca, Costa Rica. The households located in the highlands (Zone I), where there was less infrastructure and cultural homogeneity, practiced subsistence agriculture and depended on the sale of their labour in the

  14. Mixed-Methods Study that Examines Nine Science Teachers' Perceptions of Slooh Robotic Telescope for Teaching Astronomy. (Breton Title: Métodos Mistos de Estudo que Examinam a Percepção de Nove Professores de Ciências sobre o Telescópio Robótico Slooh Para Ensino de Astronomia.) Métodos Mixtos de Estudio que Examinan la Percepcion de Nueve Profesores de Ciencias sobre EL Telescopio Robótico Slooh Para la Enseñanza de la Astronomía

    NASA Astrophysics Data System (ADS)

    Gershun, Daniel C.; Slater, Timothy F.; Berryhill, Katie J.

    2014-07-01

    Although previous studies show that robotic telescopes have the potential to enhance student learning, there is comparatively little research that focuses on teacher perceptions of this technology. This study investigates: "what is the academic merit of using SLOOH robotic telescopes to teach astronomy as perceived by science teachers?" Our sample consists of nine science teachers of students aged 13-18 years. Pre- and post-tests, interviews, and surveys were collected during two weeks of a summer online course about robotic telescopes. While pre and post-tests do not reveal a statistically significant gain in astronomy content knowledge, analysis of qualitative data reveals five themes which describe the most important aspects of using SLOOH according to participants: "Images," "Interface," "Classroom Application," "Instructor Impact," and "Logistical Issues." Analysis of these themes suggests that SLOOH can provide an interactive and social learning environment with capabilities to incorporate crossdisciplinary themes. Embora estudos anteriores mostram que os telescópios robóticos têm o potencial de melhorar a aprendizagem dos alunos, há relativamente pouca investigação focada nas percepções de professores a respeito desta tecnologia. Este estudo investiga: "qual é o mérito acadêmico da utilização de telescópios robóticos Slooh para ensinar astronomia, tal como percebido pelos professores de ciências?" Nossa amostra é composta por nove professores de ciências de estudantes com idades entre 13-18 anos pré e pós-testes, entrevistas, e levantamentos foram coletados durante duas semanas de um curso on-line de verão sobre telescópios robóticos. Enquanto os testes pré e pós não revelaram um ganho estatisticamente significativo no conhecimento do conteúdo astronomia, a análise de dados qualitativos revela cinco temas que descrevem os aspectos mais importantes da utilização Slooh de acordo aos participantes: "Imagens", "Interface", "Aplicação em sala de aula", "Impacto no Instrutor" e "Questões logísticas". A análise desses temas sugere que Slooh pode proporcionar um ambiente de aprendizagem interativo e social com capacidade de incorporar temas interdisciplinares. Aunque estudios previos muostraron que los telescopios robóticos tienen el potencial de mejorar el aprendizaje del estudiante, hay relativamente poca investigación centrada en las percepciones de lós profesores respecto de esta tecnología. Este estudio investiga: "¿cuál es el mérito académico de la utilización de telescopios robóticos SLOOH para enseñar astronomía según la percepción de los profesores de ciências?" Nuestra muestra está formada por nueve profesores de ciencias de estudiantes entre 13 a 18 años pre-y post-tests, entrevistas, y. encuestas se recogieron durante dos semanas de un curso on-line de verano sobre los telescopios robóticos. Si bien lós tests antes y después de las pruebas no revelaron un aumento estadísticamente significativo en el conocimiento de contenido astronómico, el análisis de lós datos cualitativos reveló cinco temas que describen los aspectos más importantes de la utilización de SLOOH de acuerdo con los participantes:. "Imágenes", "Interface", "aplicación en el aula", "Impacto en el Instructor" y "problemas logísticos" . El análisis de estos temas sugiere que SLOOH puede proporcionar un ambiente de aprendizaje interactivo y social, con capacidad para incorporar temas transversales.

  15. Investigación sobre cómo hacer frente al cáncer

    Cancer.gov

    Los familiares proporcionan la gran mayoría de los cuidados de las personas con cáncer. Un programa educativo del City of Hope Cancer Center ofrece a los profesionales de salud la información y las herramientas necesarias para ayudar a los familiares a saber cómo cuidarse a si mismos y a sus seres queridos con cáncer.

  16. UM BREVE ESTUDO SOBRE AS ESTRUTURAS TENSEGRITY

    Microsoft Academic Search

    Telmo Egmar Camilo Deifeld; Ruy Marcelo de Oliveira Pauletti

    This work presents some preliminary results of a research on the behavior of tensegrity systems. Initially, it is discussed how the appearance of this type of structures relates to the non-conformity of some artists to traditional technical rules. The behavior of some basic tensegrity modules is then inspected, including the effects of the geometric stiffness on their stability. A constant

  17. Investigación sobre el tratamiento de cáncer

    Cancer.gov

    La Iniciativa de Respuestas Excepcionales (Exceptional Responders Initiative), un estudio que investiga los factores moleculares de los tumores en pacientes de cáncer que responden en forma excepcional al tratamiento con medicamentos, se inició hoy bajo la guía del Instituto Nacional del Cáncer (NCI). Los científicos tratarán de identificar en los tumores las características moleculares que predicen si un medicamento o una clase de medicamento en particular será beneficioso o no.

  18. Investigación sobre la detección del cáncer

    Cancer.gov

    De acuerdo con un estudio en el que participaron más de un millón de mujeres, los investigadores del NCI han determinado que el resultado negativo de una prueba para la detección del VPH proporciona mayor certeza o seguridad frente a riesgos futuros de cáncer de cuello uterino que una prueba de Pap.

  19. Informe sobre actividades 2005 Baobabs, Madagascar

    E-print Network

    representaciones 1-3 4-6 7-12 13-25 26-50 51-62 105 133 @ Bélgica Marruecos El IRD en el mundo Véase página 60 la reforzó la presencia del IRD en el mediterráneo gracias a la apertura de una representación en Marruecos

  20. Un nuevo observatorio sobre el Cordón Macón

    NASA Astrophysics Data System (ADS)

    Vrech, R.; Renzi, V.; Recabarren, P.; García Lambas, D.

    We report on the current status of the construction of an astronomical fa- cility at Cordón Macón (4660 m.a.s.l.) in Salta Province, Argentina. This project is the continuation of more than five years of site testing carried on by IATE and ESO at this site. Currently, the project is being suported by the Salta Province Government and the MINCyT. Even though the character- istics of the instrument to be located at Macón are not completely defined yet, the construction of an 8 metres diameter dome is currently under con- struction. This dome will have the capability of hosting a 1-2 m reflector telescope. FULL TEXT IN SPANISH

  1. Nota sobre "Neblina" (Notes on "Neblina")

    ERIC Educational Resources Information Center

    De Bruyne, Jacques

    1974-01-01

    Suggests that the Royal Spanish Academy change the definition of "neblina" in the next edition of the "Dictionary of the Spanish Language" to "niebla ligera" or "light fog," and cites literary usage in support. (Text is in Spanish.) (CK)

  2. Sobre la importancia de la alfabetizacin informtica

    E-print Network

    Spagnolo, Filippo

    informática. Este proceso implica necesariamente un proceso de adaptación y de aprendizaje de este "nuevo. Desgraciadamente, para la mayoría de las personas, frecuentemente la informática se reduce a las computadoras personales. Sin embargo, hoy en día además de ellas, existen sofisticadas calculadoras, redes de computadoras

  3. The Meanings of Astronomical Observation: An Analysis on the Basis of Relationship with Knowledge. (Spanish Title: Los Sentidos de la Observación Astronómica: un Análisis sobre la Base de la Relación con el Saber.) Os Sentidos da Observação Astronômica: Uma Análise com Base na Relação com o Saber

    NASA Astrophysics Data System (ADS)

    Klein, Alberto Eduardo; de Mello Arruda, Sergio; Meneghello Passos, Marinez; Vinicius Domenes Zapparoli, Ferdinando

    2010-12-01

    This article presents results of a research which aimed to understand the meanings that people construct for astronomical observation. The subjects, students and school teachers, initially received some instruction on how to view astronomical objects through the telescope. After the observation was realized, they were interviewed. The data analysis allowed the creation of 12 categories, later interpreted on the basis of relationship with knowledge (relation to the world, with himself and with others), as presented by Bernard Charlot. Este artículo presenta los resultados de una investigación que tuvo como objetivo comprender los sentidos que las personas construyen para la observación astronómica. Los sujetos, los estudiantes y maestros de escuela, recibieron inicialmente algunas instrucciones sobre cómo ver los objetos astronómicos a través del telescopio. Al término de la observación, fueron entrevistados. El análisis de datos permitió la creación de 12 categorías que más tarde fueron interpretadas sobre la base de la relación con el conocimiento (relación con el mundo, consigo mismo y con los demás), tal como presentado por Bernard Charlot. Este artigo apresenta resultados de uma pesquisa que objetivou entender quais os sentidos que as pessoas constroem para a observação astronômica. Os sujeitos da pesquisa, estudantes e professores do ensino médio, receberam inicialmente alguma instrução sobre como visualizar os objetos astronômicos através do telescópio. Após a realização da observação, eles foram entrevistados. A análise dos dados permitiu a elaboração de 12 categorias que foram posteriormente interpretadas com base nas relações com o saber (relação com o mundo, consigo mesmo e com o outro), conforme apresentadas por Bernard Charlot.

  4. O DEBATE BRASILEIRO SOBRE PLURIATIVIDADE: IMPLICAÇÕES SOBRE O DESENVOLVIMENTO RURAL E AS POLÍTICAS PÚBLICAS

    Microsoft Academic Search

    Raquel Pereira Souza; Marcelo Santos Souza

    2008-01-01

    O fenômeno da pluriatividade tem sido um tema bastante debatido e controverso. Nesse debate destacam-se duas perspectivas teóricas que polarizam o debate que são: a do “novo rural” e a da pluriatividade como “estratégia de reprodução social”. Essas perspectivas, apesar de vêem esse fenômeno como eixo dinâmico para o desenvolvimento do meio rural, possuem interpretações diferentes do que vem a

  5. On-Site Wastewater Treatment Systems: Septic Tank/Soil Absorption Field (Spanish)

    E-print Network

    Lesikar, Bruce J.; Enciso, Juan

    2000-10-13

    hasta la superficie del suelo y protegerse con una buena tapa. Estos tubos ascendentes facilitan mucho el mantenimiento del tanque. Textura del suelo: Hay tres texturas de suelo: arenosa, limosa y arcillosa. La textura del suelo afecta la rapidez con la...

  6. INFLUENCIA DE LA TEMPERATURA EN LA EVOLUCIÓN DE LA POBLACIÓN DE AEROBIOS TOTALES Y DE MICROORGANISMOS PATÓGENOS EN UN SUELO TRATADO CON LODO DE DEPURADORA URBANA

    Microsoft Academic Search

    I. B. Estrada; M. V. Gil Matellanes; A. Aller Urdiales; A. Morán Palao

    It has been studied during the application of sewage sludge to the soil, the influence of temperature in the evolution of total aerobe microorganisms and faecal pathogen microorganisms such as faecal coliforms, Escherichia coli and faecal streptococcus and the connection between the growth and the decrease of this microbial population with pH, in soil samples with and without sewage sludge,

  7. Relación entre Condiciones de Suelo y Manejo de Huertas de Nogal Pecanero Carya illinoensis Koch con la Dinámica de la Pudrición Texana, causada por Phymatotrichum omnivorum Duggar

    Microsoft Academic Search

    José Alfredo Samaniego-Gaxiola; Teodoro Herrera-Pérez; Jesús Santamaría-César

    2001-01-01

    From 1995 to 1998, 26 plots of three ha each were selected in commercial walnut orchards. The objective of the survey was to relate the dynamics of Phymatotrichum root rot with orchard management and soil condition. The management variables were: age of the trees, plantation distance, trees\\/ha, pest management, number of irrigations and incidence of diseased trees (in 1995); for

  8. Cambios en la cubierta vegetal y uso del suelo en el área del proyecto Pujal-Coy, San Luis Potosí, México, 1973-2000

    Microsoft Academic Search

    Humberto Reyes; Miguel Aguilar; Juan R. Aguirre; Irma Trejo; Humberto Reyes Hernández; Miguel Aguilar Robledo; Juan Rogelio; Aguirre Rivera; Irma Trejo Vázquez

    The objective of the present work is to identify the land-cover and land-use changes derived from irrigation project Pujal-Coy setting, east of San Luis Potosi' state, Mexico. The study is based on the interpretation and analysis of satellite images Landsat MSS and ETM+, official and historical documents of the irrigation project and field work. The results indicate that during the

  9. Capitulo 37 Noc~oes Basicas Sobre Espacos de Hilbert

    E-print Network

    Barata, João Carlos Alves

    ¸cos de Hilbert... 3John von Neumann (1903­1957). 4Nota hist´orica. Dois dos trabalhos seminais de von por diversos autores, mas foi especialmente von Neumann3 quem mais claramente destacou sua relev Neumann a respeito s~ao: J. von Neumann, "¨Uber die Grundlagen der Quantenme- chanik"

  10. O Impacto de Gestão sobre o Desempenho Educacional (Brasil)

    Microsoft Academic Search

    Rosane Silva de Mendoca; Ricardo Paes de Barros

    1997-01-01

    Uma das razões da ineficiência educacional brasileiro encontra-se na forma de gestão escolar. Desde as eleições diretas para governador em 1982 deslanchou-se no país um processo de difusão de inovações em gestão escolar. Este proceso atingiu velocidade e intensidade distintas nos diversos sistemas estaduais de ensino e baseou-se fundamentalmente em três aspectos: (i) transferência direta de recursos para as escolas,

  11. Modelo analítico del efecto de PRS sobre satélites GPS

    NASA Astrophysics Data System (ADS)

    Meza, A.; Brunini, C.; Usandivaras, J. C.

    El sistema GPS (Global Position System) es, hoy en día, la herramienta de navegación y posicionamiento más potente y lo será sin duda en la próxima década. Gran parte de su valiosa utilidad se debe a la alta precisión que permite lograr y ésta, a su vez, depende, entre otras causas, de la precisión con que se conocen las órbitas de los satélites. La presión de radiación solar (PRS) fija el límite de la precisión con que pueden calcularse en la actualidad las efemérides satelitarias. El objetivo de este trabajo es proponer una mejor resolución de este fenómeno. El modelo analítico aquí presentado, se basa en el análisis del comportamiento de los residuos de un ajuste por mínimos cuadrados en el que se utiliza el modelo de PRS propuesto por Beutler. El mismo consiste en un modelo determinista del fenómeno con dos parámetros libres. Los resultados obtenidos ponen de manifiesto que, aún después de aplicar dichos parámetros, prevalecen en los residuos efectos semidiurnos en las componentes radial,tangencial y normal. Estos resultados obtenidos se comparan con los de un trabajo desarrollado por el Instituto de Berne (Beutler et al., 1994), en el que se utilizaron como pseudo-observaciones las órbitas precisas del IGS (CODE). El intervalo de integración escogido por este centro fueron las semanas 680 y 681. En resumen se tienen arcos de 14 días para todos los satélites, donde las efemérides precisas de los mismos para los 14 días fueron utilizados como pseudo-observaciones. El modelo de fuerza que empleó dicho centro fue básicamente el tradicional en lo que respecta al modelo de las fuerzas gravitacionales, y para la PRS utilizo el modelo standard de Beutler. Los parámetros de este modelo junto con las 6 condiciones iniciales (posición y velocidad) fueron ajustados por el método general de mínimos cuadrados. Los residuos en la componente radial, tangencial y normal, para los satélites con un buen comportamiento, presentan una componente semidiurna. El modelo analítico planteado en este trabajo, predice el comportamiento de los residuos que se observan en las publicaciones más recientes. Esto abre el camino para plantear una estimación distinta de las incógnitas del problema, basado en el método de colocación por mínimos cuadrados. Ello requiere modelar estadísticamente la señal debida a las componentes de la PRS que no son tomadas en cuenta en el modelo determinista.

  12. Sobre a viagem de Enrico Fermi ao Brasil em 1934

    E-print Network

    Caruso, Francisco

    2014-01-01

    Enrico Fermi was one of the greater physicists of the XX century. In 1934, he gave several lectures in Brazil. Invited by Theodoro Ramos to work in S\\~ao Paulo, he preferred to stay in Rome and went to the USA in 1938. However, Fermi recommended Gleb Wataghin to come in his place. Wataghin made history in Brazil, becoming one of the first Professors of the future S\\~ao Paulo University. Besides his relevance to the History of Science, Fermi eventually leaved an indelible mark on the creation and institutionalization of national scientific research due to the indication of Wataghin. Despite this fact, very little is known about Fermi's trip to Brazil. This work tries to reconstruct the fullest possible steps of the famous Italian physicist in our lands.

  13. Aprendizaje de funciones usando inducción sobre clasificaciones discretas

    Microsoft Academic Search

    José Ramón Quevedo; Antonio Bahamonde

    There are two main streams in machine learning from examples: those system trying to synthesize rules (or any other equivalent mechanisms) able to classify unseen cases into a finite set of discrete categories, and algorithms aiming to induce functions. In this paper these approaches are combined in order to obtain a new method to learn functions using, as a central

  14. Consecuencias de las contracciones excéntricas del diafragma sobre su función

    Microsoft Academic Search

    Joaquim Gea; Ercheng Zhu; Juan B. Gáldiz; Norman Comtois; Igor Salazkin; José Antonio Fiz; Alejandro Grassino

    2009-01-01

    Introduction and ObjectivesEccentric contractions are those that occur after a muscle has been stretched, and they can predispose the muscle to damage. Most previous studies have been performed on limb muscles, and the potential consequences of eccentric contractions on the respiratory muscles are therefore unknown. The aim of this study was to evaluate the effects of repeated eccentric contractions on

  15. Estudios sobre Educacion, 2002 (Studies on Education, 2002).

    ERIC Educational Resources Information Center

    Estudios sobre Educacion, 2002

    2002-01-01

    This scholarly journal deals with the study of education. Articles in this second issue are: "La Vertebracion Academica de la Formacion Inicial del Profesorado" (The Academic Backbone of the Initial Formation of Teachers) (Jose M. Esteve); "Deficiencia Visual en el Nino" (Visual Deficiency in the Young Child) (Feli Peralta; Juan Narbona); "The…

  16. Hoja informativa sobre la calidad del aire interior

    E-print Network

    · Moho · Polen · Caspa del pelo de los animales · Humo secundario del tabaco · Formaldehído · Monóxido de deshumidificador para ayudar a controlar el moho. · Limpie para eliminar el polvo y el pelo de los animales. · Arregle las fugas de agua para evitar el moho. · Use spray contra insectos solo cuando sea absolutamente

  17. A influência da atividade física regular sobre o autoconceito

    Microsoft Academic Search

    Alvaro Tamayo; Ana Paula M. de Campos; Daniela R. Matos; Graciano R. Mendes; Juliana B. dos Santos; Nális T. de Carvalho

    2001-01-01

    The influence of regular physical activity on the self-concept. The objective of this research was to study the effect of regular physical activity of men and women over 40 on their self-concept. The Self- concept Factorial Scale was administered to 200 subjects, half of them practicing some kind of regu- lar physical activity and the other half being sedentary. The

  18. Apuntes sobre la educación y el entrenamiento para la calidad

    Microsoft Academic Search

    Enrique Yacuzzi

    2006-01-01

    Distinguimos entre educación para la calidad y entrenamiento para la calidad. A través de la educación, aprendemos la ‘filosofía’ de la calidad; a través del entrenamiento, aprendemos sus herramientas. Así, el aprendizaje es un concepto central de este artículo. Pero no es el único. Para que el aprendizaje sea efectivo se requiere motivación, y ésta depende de muchos factores, como

  19. Consenso español sobre la utilización de natalizumab (Tysabri ®) - 2011

    Microsoft Academic Search

    O. Fernández; J. A. García-Merino; R. Arroyo; J. C. Álvarez-Cermeño; T. Arbizu; G. Izquierdo; A. Saiz; J. Olascoaga; A. Rodríguez-Antigüedad; J. M. Prieto; C. Oreja-Guevara; M. A. Hernández; X. Montalbán

    IntroductionNatalizumab is very effective at reducing relapses and delaying disease progression in patients with relapsing-remitting multiple sclerosis (RRMS). However, treatment has also been associated with a risk of progressive multifocal leukoencephalopathy (PML). The aim of this article is to provide a consensus view on the assessment and stratification of these risks, and to improve the management of natalizumab-treated patients.

  20. Pensamientos Sobre (Thoughts on) Teaching English as a Second Language.

    ERIC Educational Resources Information Center

    Ulibarri, Mari-Luci

    This document presents ideas on various topics in teaching English as a second language. Some of the problems of English orthography and semantics are illustrated. The role of contrastive analysis is mentioned with Spanish-English illustrations. A list of second-language-acquisition principles and techniques is provided, and suggestions for…

  1. Noves dades sobre briòfits semifòssils de la Garrotxa

    Microsoft Academic Search

    Ramón Pérez-Obiol; Creu Casas i Sicart

    1999-01-01

    Hom ha estudiat els briòfits semifòssils dels diferents nivells torbosos de quatre columnes sedimentàries extretes de dipòsits quaternaris de la zona volcànica de la Garrotxa. Hom ha determinat 5 taxons: Drepanocladus aduncus, Leptodyctium riparium, Eurhynchium\\u000aschleicheri, Homalothecium<\\/i> sp. i Meesia triquetra. M. triquetra<\\/i> no s'havia trobat mai a Catalunya i només se'n coneixen dues citacions a tota la península Ibèrica,

  2. Estudios sobre Educacion, 2002 (Studies on Education, 2002).

    ERIC Educational Resources Information Center

    Estudios sobre Educacion, 2002

    2002-01-01

    This journal, which provides abstracts of its articles mostly in Spanish and a few in English, contains studies (estudios) and notes (notas) about educational issues, as well as relevant book reviews (recensiones). Studies in this issue (No. 3, 2002) are: "Unprotected Time of Early Adolescence and Intergenerational Relations: A New Educational…

  3. INFORME SOBRE LA MARCHA DE LA UNIVERSIDAD SIMN BOLVAR

    E-print Network

    Vásquez, Carlos

    Administrativo Cristián Puig Secretario Alberto Armengol Director Sede del Litoral Elaboración y Edición acciones específicas de los proyectos del Organismo 61 1.1 Procesos Electorales 61 1.2 Auditoría Interna 61

  4. 5-7 FEBRERO XVII CONGRESO ESPAOL SOBRE

    E-print Network

    Granada, Universidad de

    ´on de informaci´on en Internet Aplicaci´on de un sistema de recomendaciones que combina relevancia y Jos´e Mar´ia Armingol Sistema de localizaci´on en interiores basado en la fusi´on de informaci´on 553 ACTAS #12;ORGANIZADORES: Departamento de Inform´atica e Ingenier´ia de Sistemas, Universidad de Zaragoza

  5. Reflexiones Sobre Investigacion Educacional (Reflections on Educational Research).

    ERIC Educational Resources Information Center

    Valle, Victor M.

    Educational research can serve to improve education in both developed and developing countries. It can be oriented toward increasing knowledge about the educational reality, generating theories, or confirming immediate educational political decisions. Educational research should be an interdisciplinary undertaking; this variety helps to unify…

  6. INFORME SOBRE LA MARCHA DE LA UNIVERSIDAD SIMN BOLVAR

    E-print Network

    Vásquez, Carlos

    67 ACCIÓN CENTRALIZADA 1: GESTIÓN DEL CAPITAL HUMANO 67 PROYECTOS DE LA INTITUCIÓN EN DESARROLLO 70.7 Planificación 59 1.9 Administración Financiera 59 1.10 Administración de Recursos Humanos 61 1.11 Servicios de

  7. Algo sobre el "Don" (Something about the Word "Don")

    ERIC Educational Resources Information Center

    Pruneda, Armandino G.

    1975-01-01

    Discusses the many uses of the honorific title of "Don" in Spanish literature and Spanish colloquial speech. It may be used to joke and express irony, as in the expression "don ladron" (sir thief), and forms part of many idiomatic expressions. (Text is in Spanish.) (TL)

  8. ACTIVIDAD ANTIFUNGICA DEL ISOESPINTANOL SOBRE HONGOS DEL GENERO COLLETOTRICUM

    Microsoft Academic Search

    NATALIA ANDREA ARANGO; Auxiliar Investigación; Sede Medellín; NANCY BEATRIZ VANEGAS; JAIRO SAEZ VEGA; CARLOS MARIO GARCÍA

    2007-01-01

    Monoterpenoids are naturally occurring compounds that are found in higher- order plants. These compounds are secondary metabolites that to play a role in the metabolic functioning of the plants. In this work, isoespintanol (2-Isopropyl- 3,6-dimethoxy-5-methylphenol) extracted of leaves of Oxandra cf xylopioides, was evaluated on fungi of the Coletotricum genera (Colletotrichum gloeosporioides and Colletotrichum acutatum), we not found a correlation

  9. UNA REVISIÓN BÁSICA SOBRE CONCEPTOS Y TEORÍAS DE GOBERNABILIDAD

    Microsoft Academic Search

    Xiomara Araujo

    Governance is a concept widely used to explain governing processes, particularly those undertaken by nation states as an answer to its external environments, or those actions that refer the role of the state in co-ordinating the interaction between the public and the private sector. This is also a concept linked to the debates on development and democracy. There are several

  10. Impacto de los nuevos trenes AVE sobre la movilidad

    Microsoft Academic Search

    Juan Carlos Martín; Gustavo Nombela

    2008-01-01

    Este trabajo analiza los impactos de la nueva red de alta velocidad que se está construyendo en España. A partir de la estimación de un logit multinomial se calculan elasticidades con respecto a variables fundamentales (tiempo de viaje, frecuencia y precio). Los resultados indican que las decisiones de los individuos dependen de forma importante del tiempo de viaje, por lo

  11. Sobre el nacionalisme a Mallorca (1890-1936)

    Microsoft Academic Search

    Antoni Marimon Riutort

    2008-01-01

    Aquest article analitza l’evolució dels grups, entitats i partits nacionalistes o regionalistes a Mallorca des dels seus orígens fins al començament de la Guerra Civil de 1936. L’autor també estudia l’arrelament social, el pensament polític i els vincles amb els altres territoris catalanoparlants.

  12. Captulo 37 Nocoes Basicas Sobre Espacos de Hilbert

    E-print Network

    Barata, João Carlos Alves

    â?ºcos de Hilbert... 3 John von Neumann (1903--1957). 4 Nota histâ??orica. Dois dos trabalhos seminais de von apontada por diversos autores, mas foi especialmente von Neumann 3 quem mais claramente destacou sua relev Neumann a respeito sâ?ao: J. von Neumann, `` Ë? Uber die

  13. OBSERVAÇÕES SOBRE A FUNDAMENTAÇÃO MORAL DO DIREITO EM KANT

    Microsoft Academic Search

    ERICK CALHEIROS DE LIMA

    One could assert that the two main tasks of Kants philosophy of right are, firstly, to show that the community of external freedom must become positive as an enforced or coercive order, i.e as the submission of all arbitria to a juridical-political arrangement that is able to judge people and to punish infractions. This is conceptually achieved in the transition

  14. Ensayo sobre endurecimiento de adhesivos estructurales sometidos a cargas dinámicas

    Microsoft Academic Search

    A. RECUERO; J. P. GUTIÉRREZ; C. LÓPEZ; A. DE DIEGO

    Carbon fibre reinforced polymers are increasingly replacing the steel reinforcing systems in the repair and strengthening of concrete structures thanks to their high strength\\/weight and stiffness\\/weight ratios, corrosion resistance, lightweight, and ease of handling and application. This paper presents a study on the behaviour of bridge concrete beams strengthened with CFRP sheets when the strengthening is made when traffic is

  15. Concentraciones empresariales e información contable sobre grupos de empresas

    Microsoft Academic Search

    Vicente Condor López; Ana Monclús Salamero

    2008-01-01

    The economic globalization is making companies rationalize their structures, intensifying their concentrating operations. Therefore, the description of the activity developed by the companies involved in these kinds of proceses requieres a specific treatment. This paper describes the accountancy approach that companies use to tackle their business combinations, in general, and the group of companies, more precisely. In relation with the

  16. Considerações sobre a prevenção do câncer de mama feminino

    Microsoft Academic Search

    Luiz Claudio Thuler

    Abstract Breast cancer control should place emphasis on preventing cancers or detecting cases in early stages. Prevention not only focuses on the risks associated with breast cancer but also on protective factors. Some factors that increase breast cancer risk, such as postmenopausal obesity, high-dose exposure to ionizing radiation, exposure to pesti- cides\\/organochlorines and tobacco use, are modifiable; other risk factors,

  17. Metodologa de investigacin para la restauracin del

    E-print Network

    Rey Benayas, José María

    DESARROLLO SOSTENIBLE DEL MEDIO RURAL LEY DE 28 DE MAYO DE 2007, DE SUELO #12;CAMBIOS EN LOS USOS DEL SUELO sostenible es reivindicar el paisaje como la materialización del encuentro entre el territorio, la acción

  18. Sobre as inclinações carnais: inflexões do pensamento cristão sobre os desejos e as sensações prazerosas do baixo corporali

    PubMed Central

    RIOS, LUÍS FELIPE; PARKER, RICHARD; TERTO, VERIANO

    2011-01-01

    On carnal inclinations: from early Christianity to the present This study develops a historical review of the meanings of the “flesh” in the West, focusing on its significance in the context of Christianity. Our hope is that a study along these lines can help to illuminate current understandings of questions related to sexuality both within and outside of the religious contexts found in contemporary Brazil. Such questions are of special interest for those who are concerned with both old and new problems found in the field that has come to be known as sexual and reproductive rights, with implications for the field of Public Health. PMID:21980215

  19. Informe Sobre la Conferencia (Think Tank) de Aspira Nacional Sobre Education Bilingue (Aspira National Think Tank Report: Bilingual Education)

    ERIC Educational Resources Information Center

    Aspira, Inc., New York, NY.

    This Spanish edition reports on the Aspira National Think Tank Conference attended by educational leaders and social scientists representing the major bilingual communities namely, Puerto Ricans, Mexicans, and Cubans. The conference studied four major topics: (1) equality and not similarity, theory, rationale, and objectives of bilingual…

  20. Influence of cultivation and fertilization on total organic carbon and carbon fractions in soils from the Loess Plateau of China

    Microsoft Academic Search

    Tianyun Wu; Jeff J Schoenau; Fengmin Li; Peiyuan Qian; Sukhdev S Malhi; Yuanchun Shi; Fuli Xu

    2004-01-01

    To evaluate the degradation of soil quality and find ways to maintain soil fertility on the Loess Plateau of China, the effects of cultivation time on total organic carbon (TOC), light fraction of organic carbon (LFOC), and microbial biomass carbon (MB-C) in two soil chronosequences comprised of Huangmian (Calcaric Cambisols, FAO) and Huihe (Haplic Greyxems, FAO) soils were investigated. The

  1. Evaluation of remediation process with plant-derived biosurfactant for recovery of heavy metals from contaminated soils

    Microsoft Academic Search

    Kyung-Jin Hong; Shuzo Tokunaga; Toshio Kajiuchi

    2002-01-01

    A washing process was studied to evaluate the efficiency of saponin on remediating heavy metal contaminated soils. Three different types of soils (Andosol: soil A, Cambisol: soil B, Regosol: soil C) were washed with saponin in batch experiments. Utilization of saponin was effective for removal of heavy metals from soils, attaining 90–100% of Cd and 85–98% of Zn extractions. The

  2. Impact of the antibiotic sulfadiazine and pig manure on the microbial community structure in agricultural soils

    Microsoft Academic Search

    Ute Hammesfahr; Holger Heuer; Bert Manzke; Kornelia Smalla; Sören Thiele-Bruhn

    2008-01-01

    Large amounts of veterinary antibiotics enter soil via manure of treated animals. The effects on soil microbial community structure are not well investigated. In particular, the impact of antibiotics in the presence of manure is poorly understood. In this study, two agricultural soils, a sandy Cambisol (KS) and a loamy Luvisol (ML), were spiked with manure and sulfadiazine (SDZ; 0,

  3. Acta fytotechnica et zootechnica - Mimoriadne ?íslo Nitra, Slovaca Universitas Agriculturae Nitriae, 2009, s. 216-225 VPLYV BENOMYLU A PROMETRÝNU NA PÔDNE MIKROBIÁLNE SPOLO?ENSTVO INFLUENCE OF BENOMYL AND PROMETRYNE ON SOIL MICROBIAL COMMUNITY

    Microsoft Academic Search

    Ivana HUDECOVÁ

    The aim of this study was to determine the influence of xenobiotics (pesticides) on the soil respiration and biodiversity (numerous and PLFA proportion) of the main groups of microorganisms (bacteria and their spores utilizing organic and inorganic nitrogen, actinomycetes, G+ bacteria, G- bacteria and microscopic fungi) in the soil type Cambisol (upland grassland) from four Slovak localities (Ve?ká Fatra, Malá

  4. Carbon Sequestration: Do N Inputs and Elevated Atmospheric CO 2 Alter Soil Solution Chemistry and Respiratory C Losses?

    Microsoft Academic Search

    P. Hill; C. Marshall; H. Harmens; D. L. Jones; J. Farrar

    2004-01-01

    Soil respiration is a large C flux which is of primary importance in determining C sequestration. Here we ask how it is altered by atmospheric CO2 concentration and N additions. Swards of Lolium perenne L. were grown in a Eutric cambisol under controlled conditions with and without the addition of 200 kg NO-3 -N ha-1, at either 350 ppm or

  5. Grain yield and protein concentration of two amaranth species ( Amaranthus spp.) as influenced by the nitrogen fertilization

    Microsoft Academic Search

    Ana Pospišil; M. Pospišil; B. Varga; Z. Sve?njak

    2006-01-01

    Amaranth, an alternative cereal, is attracting researchers’ attention mainly because of the high nutritional value of its seed, which can be influenced by nitrogen fertilization. The goal of the research carried out on eutric cambisol in Zagreb in the period 2002–2004 was to determine the influence of nitrogen fertilization upon seed yield, seed protein concentration, 1000-seed weight, dry matter content

  6. Combined Radio and Dye-tracer Study To Determine The Persistence and Efficiency of Preferential Flow Paths In Untilled Agricultural Soils

    Microsoft Academic Search

    R. Penfield; T. Centofanti; A. Albrecht; E. Frossard; H. Flühler

    2002-01-01

    To investigate the persistence and transport efficiency of flow paths in structured soils, two radiotracer experiments have been performed in unsaturated, untilled agricultural loams (eutric cambisol above glacial moraine). In both experiments, four radioactive tracers (54Mn, 57Co, 65Zn, and 134Cs) and a Brilliant Blue dye solution were applied prior to excavation and sampling, and radionuclides were consistently found to be

  7. Vertical rooting patterns of mature Quercus trees growing on different soil types in northern Germany

    Microsoft Academic Search

    Frank M. Thomas

    2000-01-01

    At two different sites in northern Germany, the vertical distribution patterns of roots with diameters of up to 10 mm were investigated with the trench profile wall technique beneath mature trees of Quercus petraea (Matt.) Liebl. growing on clayey (cambi-stagnic gleysol) or sandy soil (dystric cambisol). The rooting patterns were related to soil bulk density, maximum plant-available soil water and

  8. Spatial Variability of Soil Organic Carbon Under Maize Monoculture in the Song-Nen Plain, Northeast China

    Microsoft Academic Search

    Zong-Ming WANG; Bai ZHANG; Kai-Shan SONG; Dian-Wei LIU; Chun-Ying REN

    2010-01-01

    Soil organic carbon (SOC) and its relationship with landscape attributes are important for evaluating current regional, continental, and global carbon stores. Data of SOC in surface soils (0–20 cm) of four main soils, Cambisol, Arenosol, Phaeozem, and Chernozem, were collected at 451 locations in Nongan County under maize monoculture in the Song-Nen Plain, Northeast China. The spatial characteristics of soil

  9. Changes in some physical properties of a clay soil in Central Italy following the passage of rubber tracked and wheeled tractors of medium power

    Microsoft Academic Search

    M Pagliai; A Marsili; P Servadio; N Vignozzi; S Pellegrini

    2003-01-01

    The aim of this study was to evaluate the compacting effect of rubber tracked tractors in comparison to that of the traditional wheeled tractors. Macroporosity, pore shape and size distribution, bulk density, penetration resistance and saturated hydraulic conductivity were analysed in a clay soil (Vertic Cambisol) near Rome (Italy) following one and four passes on the same track of rubber

  10. Changes in hot water soil extracts brought about by nitrogen immobilization and mineralization processes during incubation of amended soils

    Microsoft Academic Search

    G. Redl; C. Hübner; F. Wurst

    1990-01-01

    During incubation of an acid cambisol and an alkaline fluvisol, amended with glucose and nitrate, hot water soil extracts were analysed for N content, ultraviolet absorption, and fluorescence. Humic substances in the hot water extracts and in a neutral sodium pyrophosphate extract were fractionated on polyvinylpyrrolidone and measured spectroscopically. Changes in the hot water and pyrophosphate extract compositions were related

  11. Geo-pedological control of soil organic carbon and nitrogen stocks at the landscape scale

    NASA Astrophysics Data System (ADS)

    Barré, Pierre; Durand, Hermine; Chenu, Claire; Meunier, Patrick; Montagne, David; Castel, Géraldine; Billiou, Daniel; Cécillon, Lauric

    2015-04-01

    Geo-pedology, here defined as soil type (or Reference Soil Group) and parent material, can have a major impact on ecosystem (vegetation and soil) functioning. Geo-pedology can therefore deeply influence soil organic matter (SOM) stock. Nonetheless, the effect of geo-pedology on soil organic C (SOC) and N stocks has seldom been investigated. Indeed, factors known to influence SOM stocks such as land use and climate frequently co-vary with geo-pedology, so that testing the influence on SOM stocks of the factor "geo-pedology" alone is challenging. In this work, we studied SOM stocks of forest and cropland soils in a small landscape (17 km²) of the Paris basin (AgroParisTech domain, Thiverval-Grignon, France). We collected soil samples (0-30 cm) in 50 forest and cropland plots, located in five geo-pedological contexts: Luvisols developed on loess deposit, Cambisols developed on hard limestone, Cambisols developed on shelly limestone, Cambisols developed on chalk and Cambisols developed on calcareous clay deposits. We then determined SOM stocks (organic C and total N) and SOM distribution across different particle size fractions (coarse sand, fine sand and silt-clay). As expected, SOC stocks were much higher in forests (~ 83 tC ha-1) than in cultivated soils (~ 49 tC ha-1). Interestingly, Cambisols had higher SOC stocks than Luvisols (69 vs 56 tC ha-1) and the difference between SOC stocks in forest and cultivated soils was much higher for Cambisols compared to Luvisols. Within Cambisols, parent material did not influence SOC stocks but the interaction between parent material and land use was significant, indicating that the effect of land use on SOC stocks was modulated by parent material. Similar trends were observed for soil N stocks. Conversely, soil type and parent material did not control SOM distribution in soil size fractions, while forest soils showed a higher distribution of SOC and N in the sand-size fraction than cropland soils. Overall, our study evidenced a geo-pedological control of SOM stocks and clearly indicates that the change in SOM stocks resulting from a land-use change is strongly modulated by soil type. A good knowledge of the Reference Soil Group distributions is therefore needed to reduce the uncertainty on SOC stock evolutions in a changing environment from the landscape to the global scale.

  12. Emergencia y sobrevivencia de gramíneas con diferentes secuencias de humedad\\/sequía en tres tipos de suelo Emergence and survival of native and introduced grasses in an arid environment under different wet-dry sequences in three soil types

    Microsoft Academic Search

    Mario Humberto Esqueda Coronado; Alicia Melgoza Castillo; Manuel Sosa Cerecedo; Regina Carrillo Romo; Jorge Jiménez Castro

    Land degradation can be reversed using revegetation. Reseeding in degraded pastures is high risk, and requires knowledge of grass species behavior under several precipitation regimens. A study was done to evaluate germination and survival of native and introduced gramineas in an arid environment under different wet-dry sequences and in different soil types. The experiment was conducted under greenhouse conditions. Soils

  13. APTITUD FÍSICA DE TRES CLASES DE SUELOS A TRES PASTOS, EN LA PLANICIE DEL RÍO MOTATÁN, ESTADO TRUJILLO, VENEZUELA Physical suitability of the three soil class to three grass of the River Motatan lowlands, Trujillo State, Venezuela

    Microsoft Academic Search

    Neida Pineda; Edgar Jaimes; Graciano Elizalde; Guido Ochoa

    2002-01-01

    Physical suitability of three soil classes previously identified in groups and characterized through a methodology, that enables agricultural technicians and experienced farmers to define group of soils in a more understandable way, was determined. The study area covered 30,365 hectares of an alluvial sector in the Motatan River lowlands, Trujillo state, Venezuela. Land Evaluation was made using the maximum limitation

  14. SOIL WATER CONTENT MEASURED BY FDR PROBES AND THRESHOLDS FOR DRIP IRRIGATION MANAGEMENT IN PEACH TREES * CONTENIDO DE AGUA EN EL SUELO MEDIDO CON SONDAS FDR Y UMBRALES PARA MANEJO DE RIEGO POR GOTEO EN DURAZNO

    Microsoft Academic Search

    Oussama Hussein-Mounzer; José Rodolfo Mendoza-Hernández; Isabel Abrisqueta-Villena; Luis Mario Tapia-Vargas; José María Abrisqueta-García; Juan Vera-Muñoz; Mari Carmen Ruiz-Sánchez

    2008-01-01

    Soil water content was monitored continuously with multisensor capacitance probes, based on the frequency domain refl ectometry (FDR) technique, in drip irrigated young peach trees (Prunus persica (L.) Batsch) cv. Flordastar in a semiarid region of Murcia, Spain during 2004. The aim of this work was to study the effect of two irrigation treatments on volumetric soil water content and

  15. CAMBIOS DE USO DE SUELO MEDIANTE TÉCNICAS DE SISTEMAS DE INFORMACIÓN GEOGRÁFICA EN UNA REGIÓN CACAOTERA Change of Land Use by Means of Geographical Information Systems in a Cacao Region

    Microsoft Academic Search

    Rodimiro Ramos-Reyes; David J. Palma-López; Carlos A. Ortiz-Solorio; Carlos F. Ortiz-García; Gabriel Díaz-Padilla

    SUMMARY In this work the changes of soil use were analyzed in the north-central part of the Chontalpa region, Tabasco, Mexico in 1972, 1984, and 2000. Also, the cartographic information on units of land and their potential for growing cacao were up-dated, which was the direct result of classification by use capacity. The methodology used for the analysis was based

  16. El método del hidrómetro: base teórica para su empleo en la determinación de la distribución del tamaño de partículas de suelo The hydrometer method: theoretical basis for its employment in determining the soil particle-size distribution

    Microsoft Academic Search

    Jorge García Coronado; Daniel Núñez Acosta

    2007-01-01

    The objective of this work is to physically explain the bases supporting the hydrometer method for determining the soil size particle distribution. The equations related to the physical principles of the phenomenon and the principle of working of the hydrometer as such, are explained in details. An analysis of the relationship between these equations and the most well recognized simplifications

  17. Cadmium content of plants as affected by soil cadmium concentration

    SciTech Connect

    Lehoczky, E. [Pannon Univ. of Agricultural Sciences, Keszthely (Hungary); Szabados, I.; Marth, P. [Plant Health and Soil Conservation Station, Higany (Hungary)

    1996-12-31

    Pot experiments were conducted in greenhouse conditions to study the effects of increasing cadmium (Cd) levels on biomass production and Cd contents in corn, (Zea mays L.), garlic (Allium sativum L.), and spinach (Spinacia oleracea L.). Plants were grown in two soil types: Eutric cambisol soil and A gleyic luvisol soil. Spinach proved to be the most sensitive to Cd treatments as its biomass considerably decreased with the increasing Cd levels. Cadmium contents of the three crops increased with increasing levels of Cd applications. Statistical differences were observed in the Cd contents of crops depending on soil type. With the same Cd rates, Cd tissue concentration of test plants grown in the strongly acidic Gleyic luvisol soil were many times higher than that of plants grown in a neutral Eutric cambisol soil. 14 refs., 4 tabs.

  18. The effect of agricultural management systems on the weed incidence in cereals

    Microsoft Academic Search

    S. Maiksteniene; A. Arlauskiene

    Two field trials were carried out at the Lithuanian Institute of Agriculture's Joniskelis Research Station on an Endocalcari-Endohypogleyic Cambisol. The experiments were designed to identify the effects of legume pre-crops and intercrops as well as the impact of their biomass incorporated as green manure on the weed incidence in succeeding cereals. The effects of legume pre-crops red clover, sown lucerne,

  19. Long-term effect of straw and farmyard manure on soil organic matter in field experiment in the Czech Republic

    Microsoft Academic Search

    TomᚠŠimon; Olga Mikanová; Dana Cerhanová

    2012-01-01

    The effect of long-term (45 years) mineral and organic fertilization on soil organic matter (SOM) quantity (organic C and N content) and quality (hot-water-soluble C content, microbial biomass C content, hydrophobic organic components of SOM, soil enzyme activities) was determined in a field experiment established in Trutnov (North Bohemia, sandy loam, Eutric Cambisol). Six treatments were chosen for investigation: unfertilized

  20. Leaching of depleted uranium in soil as determined by column experiments

    Microsoft Academic Search

    W. Schimmack; U. Gerstmann; U. Oeh; W. Schultz; P. Schramel

    2005-01-01

    The basic features of the leachability of depleted uranium (DU) projectiles in soil was investigated by using 12 projectiles\\u000a (145–294 g DU) and 16 columns installed in an air-conditioned laboratory. Two soils widely distributed in Europe, a sandy-loamy\\u000a cambisol and a silty-loamy luvisol, were filled into the columns (3.3 kg dry soil each). The effluents of all columns were\\u000a collected weekly during

  1. Differences in growth and nutrient uptake from a coarse-soil substrate by ectomycorrhizal- and fungicide-treated Picea abies seedlings

    Microsoft Academic Search

    Nina KoeleErnst; Ernst E. Hildebrand

    2011-01-01

    In order to quantify the importance of ectomycorrhizal fungi on nutrient uptake from the coarse-soil fraction of a haplic\\u000a Cambisol (alumic), a microcosm study that allowed for nutrient budgets was designed. Ectomycorrhizal- and fungicide-treated\\u000a spruce seedlings were grown on isolated and cleaned gneiss fragments (6.3 mm > Ø > 2 mm) from 90 cm soil depth. The substrate\\u000a was the only source of Ca, K and Mg.

  2. Stress distribution and soil displacement under a rubber-tracked and a wheeled tractor during ploughing, both on-land and within furrows

    Microsoft Academic Search

    T Keller; A Trautner; J Arvidsson

    2002-01-01

    Ploughing is a field operation considered to be associated with severe soil compaction. Two experiments were carried out in Denmark on Eutric Cambisols with a Claas Challenger 2-65 E rubber-tracked tractor with a total weight of 185kN. In Experiment A, the vertical stress under the track during ploughing was measured by stress sensors at 0.1m depth in order to study

  3. Effects on some clay soil qualities following the passage of rubber-tracked and wheeled tractors in central Italy

    Microsoft Academic Search

    P Servadio; A Marsili; M Pagliai; S Pellegrini; N Vignozzi

    2001-01-01

    There is increased use of rubber-tracked tractors for ploughing on clay soil (Vertic Cambisol) in central, south and insular Italy instead of metal-tracked tractors, because they allow travel on public roads. Field tests were carried out on arable soil previously ploughed and harrowed to compare two types of tractors, one rubber-tracked (CAT Challenger Ch 45) and one wheeled (New Holland

  4. Use of dairy-industry sludge as fertiliser for grasslands in northwest Spain: heavy metal levels in the soil and plants

    Microsoft Academic Search

    M. E López-Mosquera; C Moirón; E Carral

    2000-01-01

    The suitability of dairy-plant sludge for fertilisation of a Cambisolic soil was investigated in northwest Spain. Soil properties (pH, electrical conductivity, organic matter content, NO3?, P, Ca, Mg, Na, K and Al) and soil and plant tissue heavy metal contents (Hg, Pb, Cd, Cu, Zn, Ni and Cr) were determined in 12 grassland plots fertilised over a 1–4-year period with

  5. Effect of High Nickel and Chromium Background Levels in Serpentine Soil on Their Accumulation in Organs of a Perennial Plant

    Microsoft Academic Search

    Vlado Licina; Mirjana Kresovic; Jörg Rinklebe

    2010-01-01

    The effect of high concentrations of nickel (Ni) and chromium (Cr) in alkaline serpentine Fluvisol (FL 1) on their uptake by grapevine as a perennial plant was compared to their accumulation on alkaline Fluvisol (FL 2) and an acid Cambisol (CM). The FL 1 revealed high pseudo total Ni (900–1737 mg kg) and Cr (263–775 mg kg) concentrations, whereas those in FL 2 and

  6. Carbon partitioning and below-ground translocation by Lolium perenne

    Microsoft Academic Search

    Y. Kuzyakov; H. Ehrensberger; K. Stahr

    2001-01-01

    Carbon (C) balance, rhizodeposition and root respiration during development of Lolium perenne were studied on a loamy Gleyic Cambisol by 14CO2 pulse labeling of shoots in a two-compartment chamber under controlled laboratory conditions.The losses from shoot respiration were about 36% of the total assimilated C. The highest respiration intensity was measured in the first night after the labeling, and diminishes

  7. El efecto del cloruro de N-cetilpiridina sobre la absorción de un colorante reactivo sobre Leacril. Potencial zeta y termodinámica de absorción

    Microsoft Academic Search

    Manuel Espinosa Jiménez; Alfonso Ontiveros Ortega; E. Giménez Martín

    1970-01-01

    Nous avons entrepis des recherches de type expérimentel sur l'absorption et le potentiel de flux de Remazol Blue R (RBB-R) avec des fibres Leacril traitées et non traitées avec 10^-3 M de chlorure de N-cétylpyridine (N-CP-CI). Les modèles de faisceaux capillaires utilisés sont ceux de Goring et Mason, Biefer et Mason, et Chang et Roberston. Le comportement qualitatif du potential

  8. Termodinámica de los procesos de absorción del etil xantogenato sobre fibra de poliéster. Efecto de la absorción sobre el potencial zeta del sistema

    Microsoft Academic Search

    Manuel Espinosa Jiménez; Andrés Cano

    1970-01-01

    On présente des données sur des cinétiques et la thermodynamique de sorption de l'éthylxanthogénate de sodium sur la fibre de polyester à différentes températures. La sorption de l'éthylxanthogénate est favorisée par l'accroîssement de la température d'absorption du composant avant-cité sur la fibre de polyester. Les équilibres d'absorption de l'éthylxanthogénate de sodium sur la fibre de polyester sont décrits par l'isotherme

  9. Changes in cadmium mobility during composting and after soil application

    SciTech Connect

    Hanc, Ales [Department of Agro-Environmental Chemistry and Plant Nutrition, Czech University of Life Sciences, 165 21 Prague (Czech Republic)], E-mail: hanc@af.czu.cz; Tlustos, Pavel; Szakova, Jirina; Habart, Jan [Department of Agro-Environmental Chemistry and Plant Nutrition, Czech University of Life Sciences, 165 21 Prague (Czech Republic)

    2009-08-15

    The effect of twelve weeks of composting on the mobility and bioavailability of cadmium in six composts containing sewage sludge, wood chips and grass was studied, along with the cadmium immobilization capacity of compost. Two different soils were used and Cd accumulation measured in above-ground oat biomass (Avena sativa L.). Increasing pH appears to be an important cause of the observed decreases in available cadmium through the composting process. A pot experiment was performed with two different amounts of compost (9.6 and 28.8 g per kg of soil) added into Fluvisol with total Cd 0.255 mg kg{sup -1}, and contaminated Cambisol with total Cd 6.16 mg kg{sup -1}. Decrease of extractable Cd (0.01 mol l{sup -1} CaCl{sub 2}) was found in both soils after compost application. The higher amount of compost immobilized an exchangeable portion of Cd (0.11 mol l{sup -1} CH{sub 3}COOH extractable) in contaminated Cambisol unlike in light Fluvisol. The addition of a low amount of compost decreased the content of Cd in associated above-ground oat biomass grown in both soils, while a high amount of compost decreased the Cd content in oats only in the Cambisol.

  10. Consenso sobre las pruebas de sensibilidad a los antimicrobianos en Enterobacteriaceae

    Microsoft Academic Search

    A. FAMIGLIETTI; M. QUINTEROS; M. VÁZQUEZ; M. MARÍN; F. NICOLA; M. RADICE; C. BANTAR; J. KOVENSKY PUPKO; E. COUTO; M. GOLDBERG; H. LOPARDO; G. GUTKIND; R. SOLOAGA

    SUMMARY Consensus for antimicrobial susceptibility testing for Enterobacteriaceae. Taking into account previous recommendations from the National Committee for Clinical Laboratory Standards (NCCLS), the Antimicrobial Committee, Sociedad Argentina de Bacteriología Clínica (SADEBAC), Asociación Argentina de Microbiología (AAM), and the experience from its members and some invited microbiologists, a consensus was obtained for antimicrobial susceptibility testing and interpretation in most frequent enterobacterial

  11. Diferencias en el desarrollo de Panonychus citri (McGregor) sobre hojas de diversas especies

    E-print Network

    Paris-Sud XI, Université de

    - mentina), mandarino Satsuma (C unshiu), limonero (C limon) y pomelo (C paradisi). Dichas hojas se tomaron: limonero y pomelo, Satsuma y Clementino, Navel y Valencia. También se encontró que la puesta es mayor, para

  12. SOFTWARE DE SIMULACION DE DIFERENTES TIPOS DE MODULACION DE SEÑALES DE RADIOFRECUENCIA SOBRE FIBRA OPTICA

    Microsoft Academic Search

    German Enrique; Campos Hernández; Guiovanna Paola Sabogal Alfaro

    2006-01-01

    This article presents a National Instruments LabVIEW ® developed software which includes a Virtual Instrument library named RoFSim (Radio over Fiber - SIMulator) for a full transmission radio frequency modulated signals over optical communications scheme simulation including transmission laser, optical fiber, and photodetector, over a fully graphical environment. It presents its structure, multiplexing and time and frequency analysis and optical

  13. Reducción catalítica de NOx con Pt soportado sobre zeolitas MFI modificadas con Cu, Co, Fe, Mn

    Microsoft Academic Search

    Sarah Briceño; Héctor Del Castillo

    The selective catalytic reduction of NO by propane in the presence of excess oxygen has been studied over catalysts based on Pt supported on Fe-ZSM-5, Co-ZSM-5, Cu- ZSM-5 and MnZSM-5. Pure Pt based catalysts are highly active, but produce large amounts of N2O. The bimetallic catalyst was found to offer wider temperature window than that of monocatalysts, and show a

  14. El peligro de las (in)definiciones: apuntes para un dosier sobre la \\

    Microsoft Academic Search

    Fernando de Felipe; Joaquim Roglan; Víctor-M. Amela; Joan Tharrats; Salvador Llopart; Bosco Palacios; Mireya Marrón; Martín Gálvez; David Saiz; Félix Romeo

    2007-01-01

    Toda definicio?n supone en el fondo una cierta forma de res- \\u000atriccio?n. Definir algo es, en esencia, dejar fuera de “lo defi- \\u000anido” todo lo que “por defecto” no es (ejemplo: definir \\u000a“perro” implica dejar claras las diferencias que hay entre ese ani- \\u000amal y, pongamos por caso, un gato... o una silla, tanto da). En el \\u000atema de la

  15. Sobre Algumas Tecnicas de Perturbacao Utilizadas no Problema Ressonante 3/1

    NASA Astrophysics Data System (ADS)

    Balthazar, J. M.; Sagnier, J. L.; Ferraz Mello, S.; Koiller, J.; Yokoyama, T.

    1987-05-01

    ABSTRACT. This work concerns with the study of a particular 3/1 resonant problem for which we have determined formal solutions according to the model belonging to the domain of the Restricted Elliptic Problem of Three Bodies. Key & : ASTEROIDS

  16. Influencia de algunas variables organizacionales sobre la salud y la accidentabilidad laboral

    Microsoft Academic Search

    Blanca López-Araújo; Amparo Osca Segovia

    2010-01-01

    Title: The effect of some organizational variables on health and occupa- tional accidents. Abstract: Construction work is a very dangerous occupation, thus it is important to reduce worker exposure to organizational stressors. This study examines the relationships between three organizational variables (job stress, safety climate, social support) and accidents or near-miss out- comes. Self-reported questionnaire data collected from 285 construction

  17. Efeito de tipos de leite sobre oídio em abóbora plantadas a campo

    Microsoft Academic Search

    Antonio Ismael; I. Cardoso; Edson Luiz Furtado

    Effect of types of cow milk on the powdery mildew control of pumpkin under field conditions In the present work we evaluated, under field conditions, the efficiency of several types of cow milk on the control of powdery mildew of pumpkin cv. Piramoita, caused by Sphaerotheca fuliginea. The experimental design consisted of randomized blocks with six treatments, five replications and

  18. Descoberta de Conhecimento em Processos de Workflow Modelados e Executados sobre Plataforma Oracle

    Microsoft Academic Search

    Rafael S. Garcia; Duncan D. Ruiz

    1. Introdução Atualmente, com a necessidade cada vez maior da informatização das grandes organizações, a utilização de modelagem de processos de negócio através de alguma ferramenta de workflow vem se tornando uma prática bastante comum. Diversos processos presentes no dia-a-dia de uma grande empresa podem ser automatizados, desde a solicitação e aprovação de férias, viagens e compra de produtos, até

  19. Phytochemical and biological studies on Nephelium longan (Estudios fitoquímicos y biológicos sobre Nephelium longan)

    Microsoft Academic Search

    Khondaker M. RAHMAN; Kamrun NAHAR; Mohammad Gias; Uddin KHAN; Choudhury M. HASAN

    Extensive chromatographic separation and purification of the organic solvent extracts of Nephelium longan (Sapindaceae) stem bark afforded two compounds; scopoletin and stigmasterol. The structures of these compounds were determined by spectroscopic analyses, including 1H and 13C NMR. Different crude extracts (n-hexane, carbon tetrachloride, chloroform and methanol) were tested for antimicrobial activity by standard disc diffusion method known as the Kirby-Bauer

  20. PROGRAMAS DE TRANSFERÊNCIAS DE RENDA NO BRASIL: IMPACTOS SOBRE A DESIGUALDADE

    Microsoft Academic Search

    Fabio Veras Soares; Sergei Soares; Marcelo Medeiros; Rafael Guerreiro Osório

    2006-01-01

    This paper evaluates the contribution of cash transfer programmes to the observed fall in inequality in Brazil between 1995 and 2004 as well as its impact on poverty. We use the 2004 Brazilian National Household Survey (PNAD) that for the first time collected data on the incidence of some of the cash transfer programmes. We develop a methodology to separate

  1. NUEVOS DATOS SOBRE LA FLORA DE LA PROVINCIA DE CUENCA, XXI

    Microsoft Academic Search

    Gonzalo MATEO SANZ; Olga MAYORAL GARCÍA-BERLANGA; Miguel Ángel GÓMEZ-SERRANO

    RESUMEN: Se comunica la presencia de 22 táxones pertenecientes a plantas vas- culares autóctonas o naturalizadas recolectadas en la provincia de Cuenca, que resultan raras o poco conocidas en la misma, destacando como novedades provinciales Carex demissa Hornem., Epilobium palustre L., Ranunculus ficaria L. subsp. ficaria y Senecio viscosus L. Por otro lado, Cardamine flexuosa With. no se conocía en

  2. Recursos de Trabajo: Informacion sobre Carreras (Occupational Resources: Career Information). CHOICE (Challenging Options in Career Education).

    ERIC Educational Resources Information Center

    Putnam and Northern Westchester Counties Board of Cooperative Educational Services, Yorktown Heights, NY.

    Part of a two-level career education curriculum initially developed for migrant children, the book is the first of three secondary level texts designed to provide high school students with self-awareness, job and role information, and decision-making/goal attaining information related to career education. The text provides job and role information…

  3. Ahorre Energia: Consejos sobre el ahorro de dinero y energia en el hogar (Book)

    SciTech Connect

    Not Available

    2014-09-01

    Learn how to save money with Energy Saver: Tips on Saving Money & Energy at Home, from the U.S. Department of Energy. The Energy Saver guide will help you reduce your monthly energy costs and live more efficiently. This guide takes you through the systems and appliances that consume the most energy in your home, and provides solutions to cut costs for you while saving the environment. The Energy Saver guide also includes transportation tips to help you save money at the pump.

  4. Una discusión sobre la curva de Phillips de Friedman y la tasa natural de desempleo

    Microsoft Academic Search

    Leonardo Raffo López

    2007-01-01

    In this paper I evaluate the theoretical consistency of Friedman.s Phillips curve. For this, I review his own exposition in the subject, making emphasis in his contributions to the short-run analysis of unemployment, wages and prices in front of the classical theory and Keynes.s .General Theory.. I examine his hypothesis founded in the natural rate of unemployment, looking at the

  5. Departamento de Matemticas Matemticas (CC. Qumicas) Ejercicios sobre derivacin: representacin de funciones.

    E-print Network

    : representación de funciones. En los siguientes ejercicios se pide representar una serie de funciones. Puedes usar siguientes funciones en los conjuntos que se indica. Mo- tivos técnicos impiden numerar los ejercicios de funciones en los conjuntos que se indica. Mo- tivos técnicos impider numerar los ejercicios de forma normal

  6. Uma revisão sobre instrumentos de avaliação do estado funcional do idoso

    Microsoft Academic Search

    Carlos Montes Paixão Jr.; Michael E. Reichenheim

    2005-01-01

    The Comprehensive Geriatric Assessment is char- acterized as a functional and interdisciplinary evaluation. The first step is the assessment of functional status, which lies at the core of the procedure and can be defined by the level at which an individual performs roles and activi- ties of daily living. Such assessment can be car- ried out by instruments (questionnaires) whose

  7. EFEITO DO ÓLEO DE NIM (Azadirachta indica) SOBRE OVOS DE Helicoverpa zea

    Microsoft Academic Search

    DIRCEU PRATISSOLI; LEANDRO PIN DALVI; RICARDO ANTONIO POLANCZYK; GILBERTO SANTOS ANDRADE; ALEXANDRE FARIA DA SILVA

    The effect of commercial formulation neem oil of the 0.3, 0.4 e 0.5% was evaluated, as it was applied on eggs of Helicoverpa zea with 1, 2, and 3 days old. The experiment was carried out in acclimatized chamber 25 ± 1º C, 70 ± 10% relative humidity and photophase of 14 hours, in the Entomology Laboratory of the CCA-UFES,

  8. Sobre el test de máxima potencia para hipótesis nula simple contra hipótesis alternativa simple

    Microsoft Academic Search

    Pedro José Paúl Escolano; Padl Escolano

    1984-01-01

    Resumen  El propósito de este trabajo es dar una construcción explícita del test de máxima potencia para un constraste de hipótesis\\u000a paramétrico en el que tanto la hipótesis nual como la hipótesis alternativa son simples; utilizando para ello técnicas de\\u000a Análisis Funcional y de Programación Matemática.

  9. Bibliografia sobre el "bilinguismo" del Paraguay (A Bibliography on Bilingualism in Paraguay)

    ERIC Educational Resources Information Center

    Melia, Bartomeu

    1974-01-01

    This bibliography of ninety-five entries ranging in publication date from 1847 to 1947 brings together information from areas of history, literature, sociology, anthropology, sociolinguistics, descriptive linguistics, folk-lore and language planning, the central criterion being the relationship of these areas specifically to the bilingual…

  10. VI-1.20(A) POLTICA DE LA UNIVERSIDAD DE MARYLAND SOBRE LA CONDUCTA SEXUAL INDEBIDA

    E-print Network

    Bernstein, Joseph B.

    razones de sexo, lo cual es contrario al Código de Equidad de la Universidad de Maryland, Diversidad e sexual indebida, que puede ser entre personas del mismo sexo o del sexo opuesto. La conducta sexual indebida puede ser una forma de discriminación por razones de sexo, prohibida por la legislación federal y

  11. La ciudad vivida: movilidad espacial y representaciones sobre la estratificación social en Bogotá 1

    Microsoft Academic Search

    Consuelo Uribe Mallarino; Camila Pardo Pérez

    2006-01-01

    A specific form of social mobility, spatial mobility, is examined in this paper. Likewise, social representations by residents of different social strata are analyzed. The research project that the current results are based upon, deals with the effects of the stratification policy on paying public utilities and with social mobility. Spatial mobility patterns towards and within Bogotá are reviewed, as

  12. APUNTES SOBRE CODIFICACIÓN Y COSTUMBRE EN LA HISTORIA DEL DERECHO COLOMBIANO

    Microsoft Academic Search

    MAURICIO GARCÍA VILLEGAS

    There is, in Latin America, a general culture of non-observance of the law that has not been studied at length. In order to offer a historical perspective on the roots of this phenomenon, the article follows the development of the law and legal institutions during the colonial period and independence. Both periods show a divergence between the legal archetype that

  13. Las Preguntas Que Hacen los Padres sobre la Escuela (Questions Parents Ask about School).

    ERIC Educational Resources Information Center

    National Opinion Research Center, Chicago, IL.

    This guide presents questions that parents frequently ask about their children's school along with answers to those questions. The questions and answers were prepared based on the results of studies conducted by the Partnership for Family Involvement in Education, the U.S. Department of Education, the GTE Foundation, and by the National Center for…

  14. Acción biocida de plantas de Piper tuberculatum Jacq. sobre Diatraea saccharalis (Lepidóptera, Pyralidae)

    Microsoft Academic Search

    Gladys V. Soberón; Consuelo Rojas; Jorge Saavedra; Massuo J. Kato; Guillermo E. Delgado

    The biocid action of DCM:MeOH (2:1), EtOH and aqueous extracts of leaves, stems and mature spikes (with fruits and seeds) of field plants and DCM:MeOH (2:1) extract of in vitro plants of Piper tuberculatum on III larval stage of Diatraea saccharalis was evaluated. The method was by inoculating the previously eluted extract with distillate water as topic applications on the

  15. REFLEXIONES PRELIMINARES SOBRE UNA APLICACIÓN CIENTÍFICO-MÉDICA DE ACTUALIDAD: LA CLONACIÓN

    Microsoft Academic Search

    José Antonio Arranz; Xavier Ariza; Encarnació Riudor; Lluis Vilar; Jordi Salvadó; Núria Galofré; Susana Vendrell; Josep María Esquirol

    2003-01-01

    Resumen: Este artículo afronta el nuevo reto que la tecnociencia médica ha abierto: la posibilidad de clonación terapéutica o reproductiva. En el presente trabajo se aborda, clara y esquemáticamente, la terminología científico-médica, desde los conceptos de reproducción sexual o asexual hasta la endonucleación, pasando por los conceptos de embrión gamético, somático, de cultivo y células madres, para ir realizando un

  16. Un país hispánico donde no se habla español: informe sobre el estado del español en Filipinas

    E-print Network

    Villaroel, O. P., Fidel

    2014-01-01

    educados en la enseñanza del inglés. A su vez, la prensaa usar el inglés como instrumento de enseñanza en todas susenseñanza en los centros docentes ya no es recomendable, máxime cuando el mismo inglés

  17. Impacto de un complejo de antioxidantes sobre la fragmentación del ADN espermático en varones infértiles

    Microsoft Academic Search

    Carlos Balmori Boticario; Cristina Areces Viña; Alberto Pacheco Castro; Marta San Celestino Carchenilla; Juan Antonio García Velasco

    2010-01-01

    In assisted reproduction treatments it is no longer enough to obtain spermatozoa, we must find the best spermatozoa. Among the different parameters studied until recently, such as concentration, motility and morphology, varying success rates were observed even with similar classical sperm quality markers. Thus, research has been developed in order to find new markers of sperm quality. One of them

  18. Listado 2012 de bibliografa sobre EXTENSIN UNIVERSITARIA para Amrica, Central, Amrica

    E-print Network

    Vásquez, Carlos

    Sul e Caribe Marcelo Luis López ­ Norma Beatriz Di Filippo Ordoñez ­ Laura Fabiola del V. Aramayo SAN SALVADOR DE JUJUY / REPÚBLICA ARGENTINA ­ diciembre de 2012 EL SIKU / ISBN: 978-987-26670-1-6 #12;- 2 de 35 este catálogo para encontrar bibliografia para os seus trabalhos por favor citar a fonte. Marcelo Luis

  19. Afectación extracraneal de oligoastrocitoma anaplásico desarrollado sobre un glioma de bajo grado

    Microsoft Academic Search

    Jorge Molina Saera; Ángel Segura Huerta; Laura Palomar Abad; Alejandra Giménez Ortiz; José Ponce Lorenzo; Gaspar Reynés Muntaner

    2005-01-01

    \\u000a Abstract  Oligodendrogliomas are primary brain tumours derived from oligodendroglial cells, or precursors, and represent 2%–5% of brain\\u000a tumours. This type of glioma has a favourable prognosis compared to other brain tumours. The treatment is multidisciplinary\\u000a and is based on three therapeutic arms: surgery, radiotherapy and chemotherapy. We present a patient who had received treatment\\u000a previously for a lowgrade glioma and who

  20. Los ojos de la NASA sobre la Tierra - Duration: 97 seconds.

    NASA Video Gallery

    La NASA cuenta con más de una decena de satélites que estudian la Tierra. Conoce la información que recaban los satélites, junto con Gilberto Colón, asistente especial del subdirector del Centro de...

  1. FUNCIÓN SOCIAL DE LAS LÁGRIMAS: UNA INDAGACIÓN EMPÍRICA SOBRE LOS TIPOS DE LLANTO EMOCIONAL

    Microsoft Academic Search

    OSCAR SIERRA FITZGERALD; BEATRIZ E. MEJÍA CONSTAÍN

    Human emotional interchange implicates expression\\/recognition of emotions. The human face is a conspicuous place to express\\/read emotion. Certain emotions associate with emotional tearing, differentiable from basal and reflex tearing. Murube, Murube and Murube (1999) classified emotional tearing in requesting- and offering -help. The validity of that typology was evaluated using faces of people of both sexes crying because of their

  2. A PERCEPÇÃO DOS CARPINTEIROS SOBRE A ORGANIZAÇÃO DO SEU TRABALHO CONSTATADA POR MAPAS COGNITIVOS

    Microsoft Academic Search

    José Adelino; Leila Amaral

    This article deals with the carpentry tasks at construction sites, applying the ergonomic analysis of the work. The study intended to verify the efficiency of an education process. The carpentry tasks were analyzed, including the implications, the conditioning factors and the work organization. The activities performed by the carpenters were observed, and a photographic register showed all the required steps.

  3. XV Simpsio Brasileiro de Recursos Hdricos 1 SOBRE O DESIGN DE UM SISTEMA DE SUPORTE DECISO

    E-print Network

    Cengarle, María Victoria

    Resumo - Neste artigo apresentamos uma aplicação da tecnologia de sistemas baseados em modelos, dentro do-chave - Sistema de Suporte à Decisão, Diagnóstico Baseado em Modelos, Raciocínio Qualitativo, Inteligência Artificial, Tratamento de Água. INTRODUÇÃO Sistemas de conhecimento com base em modelos fornecem meios para

  4. On Modelling an Immune System Sobre un Modelo Computacional del Sistema Inmune

    Microsoft Academic Search

    Raúl Monroy; Rosa Saab; Fernando Godínez; Eugenio Garza Sada; Nuevo León

    2004-01-01

    Immune systems of live forms have been an abundant source of inspiration to contemporary computer scientists. Problem solving strategies, stemming from known immune system phenomena, have been successfully applied to challenging problems of modern computing. However, research in artificial immune systems has overlooked establishing a coherent model of known immune system behaviour. This paper aims reports on an preliminary computer

  5. Notes sobre la difusió de l’art català als Estats Units

    Microsoft Academic Search

    Francesc Fontbona

    2009-01-01

    Marxants com Adolphe Goupil difongueren als EUA l’obra de pintors com Marià Fortuny -que tingué bons col·leccionistes com William H. Stewart- o Romà Ribera. George A. Lucas, nordamericà establert a París, promogué, des 1880, l’obra de Casanova Estorach. Com al segle XX Durand-Ruel hi portà obra de Ricard Canals.\\u000aAltres hi viatjaren pel seu compte, com el pintor romàntic Eduard

  6. Guia para los padres sobre educacion preescolar (A Parents' Guide to Early Childhood Education).

    ERIC Educational Resources Information Center

    Dodge, Diane Trister; Phinney, Joanna

    This handbook, entirely in Spanish, was originally intended for parents whose children attend programs which use "The Creative Curriculum for Early Childhood" (CCEC), but the information is also useful to parents whose children attend early childhood programs using other curriculum models based on child development theories. The purpose of the…

  7. Sobre els cartells d'Alexandre de Riquer i les seves fonts

    Microsoft Academic Search

    Rafael Cornudella i Carré

    1995-01-01

    El paper capdavanter d'Alexandre de Riquer en la historia del cartelisme català és reconegut per tota la historiografia. Tanmateix, no disposem encara d'un catalogue raisonné de la seva producció cartellística. El nostre article aporta un conjunt de precisions que contribueixen a l'elaboració d'aquest catàleg, encara obert. Però, sobretot, insistim en la necessitat d'investigar més a fons les fonts internacionals del

  8. EFECTO DE LOS PARÁMETROS DEL PROCESO DE PUNZONADO SOBRE EL COMPORTAMIENTO EN FATIGA DE ACEROS ESTRUCTURALES

    Microsoft Academic Search

    D. Pesquera; L. Sánchez; F. Gutiérrez-Solana

    In the framework of a research project (1-2) on the performance c riteria for cold formed structural steels, a study of the influence of different parameters of punching p rocess on the fatigue behaviour, such as plate thickness, hole diameter, clearance and loading direction, is being carry out. This study is being performed by means of the determination of the

  9. Cmo expresar sus deseos sobre su cuidado y tratamiento 450 Brookline Ave.

    E-print Network

    Liu, Xiaole Shirley

    podría obtener. Se necesita la toma seria de decisiones médicas al considerar las numerosas opciones.dana-farber.org Decisiones para cuidados de salud: planificación por adelantado Usted tiene derecho a tomar las decisiones decisiones médicas por sí mismo. En Massachusetts, la persona que usted elige se denomina apoderado de

  10. Guía de buenas practicas sobre herramientas de selección y comprobación inspectora

    Microsoft Academic Search

    Banco Interamericano de Desarrollo

    2007-01-01

    En el presente documento analizamos los principales problemas a los que se enfrentan los diferentes países de Latinoamérica en sus procesos de fiscalización y las técnicas para solucionarlos. En general, los problemas y las maneras de afrontarlos son muy parecidos. La distinta situación en que pueden encontrarse las diferentes Administraciones pone de manifiesto un proceso similar de desarrollo administrativo y

  11. Acerca de este aviso Este Aviso le informar sobre las formas en que podemos

    E-print Network

    Qian, Ning

    necesite saber si usted tiene dia- betes, ya que la diabetes puede demorar el proceso de curación. Los todos nuestros pacientes reciben cuidado de calidad y para fines administrativos y de manejo. Por

  12. Inteligência emocional: um estudo de validade sobre a capacidade de perceber emoções

    Microsoft Academic Search

    José Maurício Haas Bueno; Ricardo Primi

    2003-01-01

    ano do curso de Psicologia, com idades entre 21 e 50 anos, estagiários na disciplina de Psicodiagnóstico, além de 8 professores supervisores da mesma disciplina. Os protocolos foram pontuados por 3 métodos: concordância com o consenso, concordância com especialistas e concordância com a pessoa-alvo. Discutiu-se alguns problemas metodológicos relacionados a esses critérios de pontuação. Obtiveram-se correlações estatisticamente significativas com o

  13. ¿Se perciben con inteligencia emocional los docentes? Posibles consecuencias sobre la calidad educativa

    Microsoft Academic Search

    Raquel Palomera Martín; Marc A. Brackett

    Do teachers perceive themselves as emotionally intelligent? Possible consequences on quality in education Due to the increase in the demand of emotional intelligence programmes in schools and given the relevance of the role of teachers in their implementation, the objective of our study has been to analyse the perception, not only of practising teachers but also of future teachers

  14. Nueva investigacion sobre kindergarten de dia completo (Recent Research on All-Day Kindergarten). ERIC Digest.

    ERIC Educational Resources Information Center

    Clark, Patricia

    Noting that much of the early research on the effects of all-day kindergarten had serious problems with internal and external validity due to inadequate methodological standards, this Spanish-language digest reviews research conducted in the 1990s. The digest discusses the academic, social, and behavioral effects of all-day kindergarten, as well…

  15. DISYUNTIVAS EN LAS CONCEPCIONES SOBRE AUTONOMÍA Y BENEFICENCIA QUE AFECTAN LA TERAPÉUTICA DEL INTENTO SUICIDA1

    PubMed Central

    Mondragón, Liliana; Monroy, Zuraya; Ito, Ma. Emily; Medina-Mora, Dra. Ma. Elena

    2010-01-01

    El objetivo del trabajo es conocer las disyuntivas entre los principios de beneficencia y autonomía, que se presentan en la relación médico-paciente, durante la terapéutica del intento de suicidio. La investigación se realizó en dos hospitales psiquiátricos de la Ciudad de México. La muestra incluyó a tres sujetos con intento de suicidio, mayores de 18 años, que eran atendidos en consulta externa a causa de una lesión autoinfligida en el último año, y a tres psiquiatras que trataban a estos pacientes. La información se obtuvo previo consentimiento informado en entrevistas individuales. Se llevó a cabo un análisis de discurso argumentado para encontrar los significados que los participantes otorgaron a los principios bioéticos y las posibles disyuntivas entre éstos. Las discordancias entre la beneficencia y la autonomía estuvieron relacionadas con el beneficio del tratamiento, el respeto por los valores y las creencias de los pacientes, entre otros. Este trabajo presenta consideraciones éticas relevantes en el escenario clínico, al ofrecer al psiquiatra un análisis bioético que le permita actuar de acuerdo con la beneficencia y respetando la autonomía del paciente frente a casos de intento de suicidio y, de esta forma procurar una mejor atención para ellos. PMID:20830214

  16. Sobre Como Varian las Firmas Manuscritas con el Tiempo: una Modelizacion Sigma Lognormal

    E-print Network

    Autonoma de Madrid, Universidad

    de edad basado en los par´ametros del modelo. 1 Introducci´on Como en cualquier nuevo ´area de- conocimiento, con el objetivo de conseguir menores tasas de error. Como conse- cuencia, se han pasado por alto nueva aproximaci´on para el estudio de firmas pertenecientes a grupos de edades dis- tintas. #12;La

  17. Efectos del salario mínimo sobre el estatus laboral de los jóvenes en Colombia

    Microsoft Academic Search

    Yenny Catalina Aguirre Botero

    2011-01-01

    Resumen: Las altas tasas de desempleo que ha presentado la economía colombiana en las últimas décadas, particularmente en la población más joven, son preocupantes. Una de las causas probables para esta situación podría ser la imposición de un salario mínimo en el mercado laboral, que desplaza a los jóvenes a la condición de desempleados o inactivos. Para determinar esta relación,

  18. ACTUALIDADES SOBRE LA EPIDEMIOLOGA DE LA ENFERMEDAD DE CHAGAS EN MXICO

    E-print Network

    Hammerton, James

    período más productivo de la vida, entre los 35 y 55 años de edad, y requiere del empleo de terapias de reporta una seroprevalencia de 1.0% para niños de edad escolar (Ramsey et al. 2001). Esta cifra contrasta rurales, aún cuando éstas representan una menor parte de la población (24% en el caso de Morelos), pueden

  19. Recomendaciones sobre métodos de estimación forense de la edad de los menores extranjeros no acompañados

    Microsoft Academic Search

    Pedro M. Garamendi González; Rafael Bañón González; Amadeo Pujol Robinat; Fernando F. Aguado Bustos; María Irene Landa Tabuyo; José Luis Prieto Carrero; Fernando Serrulla Rech

    2011-01-01

    Age estimation of unaccompanied minors is an issue that occasionally demands forensic assessment. There is currently significant disparity between diagnostic procedures used in Spain. The aim of this document is to standardise and harmonise the minimum technical requirements of expert reports, and how the standard deviation due to normal distribution as well as how the variability in individual physical development

  20. Evaluación del efecto de algunas características inherentes al animal sobre la terneza de la carne bovina

    Microsoft Academic Search

    Ricardo Camacho

    2009-01-01

    Se evaluó la diferencia de la terneza entre carnes bovinas en edades diferentes dentro de los rangos normales a las cuales son llevadas estas a sacrificio, siendo calculados sus índices de deposición grasa según el sexo debido a las diferencias halladas de dicho rasgo entre machos y hembras, de igual forma que razas taurinas e índicas. Para determinar la concentración

  1. Observaciones sobre estacionalidad de vuelos de fidos cubanos y particularmente de Myzus persicae (Sulz.) en

    E-print Network

    Boyer, Edmond

    de pucerons à Cuba et particulièrement de Myzus persicae (Sulz.) en culture de pomme de terre. L'année (pièges « permanents ») et pendant la durée du cycle de culture de la pomme de terre (pièges « temporaires cas sur 8. Ces résultats sont discutés dans le cadre d'une étude épidémiologique des maladies à virus

  2. NOTAS SOBRE NEÓFITAS 3. DISTRIBUCIÓN DE ALGUNAS BRASSICACEAE DE RECIENTE INTRODUCCIÓN EN EL CENTRO DE MÉXICO

    Microsoft Academic Search

    HEIKE VIBRANS

    Additional information is presented on the distribution of various exotic species of Brassicaceae, introduced recently to central Mexico. Three populations of Thlaspi arvense L. and Sinapis alba L. are reported. The species Diplotaxis muralis (L.) DC., Hirschfeldia incana (L.) Lagrèze-Fossat and Brassica tournefortii Gouan, known previously from northern Mexico, are now naturalized at various localities in the central part of

  3. Estudios realizados en España sobre concentraciones en humanos de compuestos tóxicos persistentes

    Microsoft Academic Search

    Miquel Porta; Elisa Puigdomènech; Ferran Ballester; Javier Selva; Núria Ribas-Fitó; Luis Domínguez-Boada; Piedad Martín-Olmedo; Nicolás Olea; Sabrina Llop; Marieta Fernández

    2008-01-01

    No systematic review is available on studies conducted in Spain on human concentrations of persistent toxic substances (PTS). The objectives were: to identify studies conducted in Spain in the past 30 years that determined concentrations in humans of dichlorodiphenyltrichloroethane (DDT), dichlorodiphenyldichloroethane (DDE), hexachlorobenzene (HCB), hexachlorocyclohexane (HCH) and polychlorinated bi-phenyls (PCBs); and to summarize the main characteristics and results of each

  4. Impacto de una intervención de autoevaluación clínica sobre la adecuación de la estancia hospitalaria

    Microsoft Academic Search

    Jaume Monteis Catot; Montserrat Martín-Baranera; Nikita Soler; Josep Vilaró; Carlos Moya; Francesc Martínez; Marta Riu; Carme Puig; Antoni Riba; Gemma Navarro; Assumpta Espinagosa; Genís Carrasco Gómez; Xavier Castells; Salvador Peiró

    2007-01-01

    AimTo assess the impact of an intervention on inappropriate hospital stays (IHS) in acute-care hospitals in Catalonia (Spain) with the aim of testing the hypothesis that a simple intervention (adeQhos®) reduces the proportion of IHS.

  5. 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…

  6. PAULO FREIRE, UM EDUCADOR AMBIENTAL: APONTAMENTOS CRÍTICOS SOBRE A EDUCAÇÃO AMBIENTAL A PARTIR DO PENSAMENTO FREIREANO

    Microsoft Academic Search

    Andreisa Damo; Christian da Silva Simões; Danieli Veleda Moura; Luís Fernando Minasi; Ricardo Gauterio Cruz

    2012-01-01

    O ponto de partida para o debate que aqui levantamos está situado nas questões trazidas por Paulo Freire em diversas de suas obras. Procuramos levantar alguns pontos cruciais suscitados pelo autor, orientados pela perspectiva dialética materialista, de modo a dialogar com os princípios da Educação Ambiental.No plano social, entendemos que a Educação Ambiental que pretende ser transformadora precisa assumir-se com

  7. Notas sobre dos autores mejicoamericanos de California (Notes on Two Mexican-American Authors in California).

    ERIC Educational Resources Information Center

    Moesser, Alba

    This paper discusses the work of two Mexican American authors, Jose A. Villerreal and Richard Vazquez, using "Pocho" by Villarreal and "Chicano" by Vazquez as the focus for discussion. Both authors describe the world of Mexican Americans and their social conditions, and both underscore the need for conserving their native culture and reject the…

  8. INFORME SOBRE L'APLICACI DEL RGIM DE DEDICACI DEL PROFESSORAT DE LA UPC

    E-print Network

    Casanellas, Marta

    ;1 INFORME AVALUACIÓ DEL RÈGIM DE DEDICACIÓ DEL PDI DE LA UPC Convocatòria 2011 PREÀMBUL En data 24 de juliol realitzar la difusió dels resultats del procés entre el PDI afectat, es varen gestionar les incidències'aquesta fase, són Difusió dels resultats · Total PDI avaluat 1.755 · PDI que va accedir a l'aplicació 1.557 (88

  9. SOBRE LOS FUNDAMENTOS INTERNACIONALES DE LA POLÍTICA ARGENTINA: TEORÍA Y REALIDAD

    Microsoft Academic Search

    Roberto Miranda

    2005-01-01

    RESUMEN: Toda política exterior tiene fundamentos teóricos que la sostienen. En América Latina hubo teoría internacional que fue fuente de inspiración de las relaciones exteriores de varios países. A pesar de los numerosos cambios que impuso la posguerra fría y la globalización, algunos países conservaron y actualizaron esta inspiración. En otros países, como la Argentina, los enfoques desti- nados a

  10. Qu es un ensayo clnico sobre la infeccin por el VIH/SIDA?

    E-print Network

    Levin, Judith G.

    efectos secundarios imprevisibles. · Es posible que los protocolos exijan al paciente bastante tiempo y frecuentes viajes al sitio del ensayo. Un servicio del Departamento de Salud y Servicios Humanos de los estudio? · ¿Cuánto tiempo durará el estudio? · ¿Quién me presta

  11. Agradecimientos Muy al principio de la maestra, Anglica Garca me present un artculo sobre redes de

    E-print Network

    Guerra Hernández, Alejandro

    trabajo enormemente gracias a las conversaciones sostenidas durante todo este tiempo; a Memo Hoyos siempre zarpar en compañía de tan entusiasta tripulación en el primer viaje del buque de la MIA de la UV". Este

  12. Dinámica macroeconómica y la curva de Philips bajo diversos supuestos sobre el mecanismo de ajuste salarial

    Microsoft Academic Search

    Alejandro Rodríguez Arana

    2004-01-01

    In a quite simplified model, when nominal wages are completely predetermined, different macroeconomic shocks produce oscillations in output and inflation that can be stable or explosive. If they are stable, in many cases a peculiar dynamics, perhaps complex, appears, where output and inflation show cycles of multiple order. Even in those cases the cycles show well defined patterns. The model

  13. Los campos de concentración en Europa. Algunas consideraciones sobre su definición, tipología y estudios comparados

    Microsoft Academic Search

    Jan Stanis?aw Ciechanowski

    2005-01-01

    El artículo presenta el problema de los campos de concentración en Europa durante la Segunda Guerra Mundial y la posguerra. Aborda el origen y funcionamiento de los campos nazis y soviéticos, y presenta la perspectiva comparada de los campos de los países totalitarios con los campos de prisioneros de guerra y de internamiento, también denominados «de concentración». Para este fin

  14. La Naturaleza Contradictoria de las Peliculas Hechas en Mexico Sobre la Revolucion Mexicana

    E-print Network

    Garza, Alex Steve

    2010-10-12

    constitucionalistas de Carranza y cuando Villa quiso tomar el pueblo fronterizo de Agua Prieta, Wilson, pensando que la victoria de Villa en esta ciudad le ayudar?a al revolucionario a obtener armamentos, ayud? a transportar tropas constitucionalistas a la batalla...

  15. Documento de consenso sobre fototerapia: terapias PUVA y UVB de banda estrecha

    Microsoft Academic Search

    José M. Carrascosa; Jesús Gardeazábal; Amparo Pérez-Ferriols; Agustín Alomar; Pilar Manrique; María Jones-Caballero; Mario Lecha; José Aguilera; Jesús de la Cuadra

    2005-01-01

    It is essential to develop a consensus document on phototherapy in order to adapt this procedure to the specific characteristics, needs and reality of our milieu.Using a review of existing literature on the subject and the experience of its own members as a reference, the Spanish Photobiology Group (GEF) of the Spanish Academy of Dermatology and Venereology (AEDV) has developed

  16. Situación de la Gestión del Riesgo en Bolivia: Indicadores sobre Su Desempeño

    Microsoft Academic Search

    María Elen Soria

    2006-01-01

    Esta presentación fue comisionada por la Red de Desastres Naturales del Diálogo Regional de Política para la Reunión Subregional de los países andinos de la Red de Desastres Naturales celebrada el día 25 de octubre de 2006 en Cochabamba, Bolivia.

  17. Ecocardiografía tridimensional. Nuevas perspectivas sobre la caracterización de la válvula mitral

    PubMed Central

    Solis, Jorge; Sitges, Marta; Levine, Robert A.; Hung, Judy

    2010-01-01

    Recent developments in three-dimensional echocardiography have made it possible to obtain images in real time, without the need for off-line reconstruction. These developments have enabled the technique to become an important tool for both research and daily clinical practice. A substantial proportion of the studies carried out using three-dimensional echocardiography have focused on the mitral valve, the pathophysiology of mitral valve disease and, in particular, functional mitral regurgitation. The aims of this article were to review the contribution of three-dimensional echocardiography to understanding of the functional anatomy of the mitral valve and to summarize the resulting clinical applications and therapeutic implications. PMID:19232192

  18. Apuntes sobre la distribución geográfica de Neoleucinodes elegantalis (Lepidoptera: Crambidae) en Colombia

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Neoleucinodes elegantalis is considered the most limiting pest for production and merchandising of solanaceous fruit and vegetables in the Neotropics. The present study updates the geographic distribution of N. elegantalis in areas of major agricultural production of Solanum lycopersicum, S. melong...

  19. La doctora Martha Linet comenta sobre el uso de teléfonos celulares y el riesgo de cáncer

    Cancer.gov

    La doctora Martha Linet, jefa de la Subdivisión de Epidemiología de la Radiación de la División de Epidemiología y Genética Oncológica del NCI, responde a preguntas acerca de las investigaciones en curso de los teléfonos celulares y el riesgo de cáncer.

  20. Sobre la Universidad UMASS Amherst es el recinto principal del sistema de la Universidad

    E-print Network

    Mountziaris, T. J.

    : biotecnología animal, ingeniería química, química, ciencia de computadora, historia, matemáticas, filosofía y una experiencia única de aprendizaje a través de su Commonwealth Honors College. A través del colegio

  1. Memorias Tercer Congreso Internacional sobre la Enseñanza de la Matemática Asistida por Computadora

    Microsoft Academic Search

    Lorena Acuña; Maricella Becerril; Elsie Villalobos

    Un ambiente de aprendizaje apoyado con computadoras bajo un enfoque algorítmico, por medio de presentaciones de PowerPoint, puede resultar de gran ayuda para la en señanza de la Matemática. Dentro del proceso de ap rendizaje, en la fase de motivación puede resultar altamente estimulante a n ivel sensorial; en la fase de comprensión permite l a reiteración de los conceptos

  2. Nuevos paradigmas en ecologia y su influencia sobre el conocimiento de la dinamica

    E-print Network

    Veblen, Thomas T.

    de la teoría de dinámica de la vegetación y presenta brevemente estudios de casos provenientes de la contemporáneas al estudio de la dinámica de bosques. La teoría sucesional clásica enfatizaba la naturaleza del sitio ("condiciones iniciales"). Las aproximaciones actuales al estudio de la dinámica de la

  3. Podredumbres basales de Gypsophila paniculata (Caryophyllaceae): Agentes causales y su patogenicidad potencial sobre Dianthus caryophyllus (Caryophyllaceae)

    Microsoft Academic Search

    SILVIA MARÍA WOLCAN; LÍA RONCO; GLADYS ALBINA LORI

    Summary: Basal rots of Gypsophila paniculata (Caryophyllaceae). Causal agents and its potential pathogenicity on Dianthus caryophyllus (Caryophyllaceae) The aims of the paper were to determine the causal agents of basal rots of Gypsophila paniculata in Argentina, and to evaluate its possible pathogenicity on Dianthus caryophyllus. Fusarium solani, F. oxysporum, Phytophthora nicotianae, Rhizoctonia solani, F. graminearum, F. verticilloides, F. equiseti and

  4. Perspectiva sobre una Personalidad Senera: Carmen Fischer Ramirez (Perspective on a Singular Personality: Carmen Fischer Ramirez).

    ERIC Educational Resources Information Center

    Quezeda, Dina Alarcon

    1992-01-01

    Traces the career of Carmen Fischer Ramirez, focusing on her work in improving early childhood education in Chile. Reviews her university career, work with the World Organization for Early Childhood Education, and major publications. (AC)

  5. Perspectiva General sobre la Sordo-Ceguera (Overview on Deaf-Blindness). DB-LINK.

    ERIC Educational Resources Information Center

    Miles, Barbara

    This overview provides basic information on the causes of deaf-blindness and the particular challenges faced by individuals who are deaf-blind. Causes of deaf-blindness include various syndromes, multiple congenital anomalies, prematurity, congenital prenatal dysfunction, and various postnatal causes. Differences between people deaf-blind from…

  6. PROPUESTA DE UNA REPARACIÓN SOBRE PLACAS DE FIBRA DE CARBONO SOMETIDAS A IMPACTO BALISTICO

    Microsoft Academic Search

    A. Monsalve; B. Díaz; L. Venegas

    Carbon fibre is a material with increasing use for airplanes construction due to its low specific weight and relatively high mechanical strength. Its use is of particular interest in the construction of combat helicopters, which can be subjected to fire coming from low calibre weapons, typically used by infantry troops. The effect on the mechanical behaviour of carbon fibre sheets

  7. Iniciativa sobre Efectividad: Un entorno para el aprendizaje (Initiative about Effectiveness: An Environment for Learning).

    ERIC Educational Resources Information Center

    Moreno Garcia, Teresa, Ed.

    2000-01-01

    This Spanish- and Portuguese-language bulletin presents articles focusing on the Effectiveness Initiative (EI), a project of the Bernard van Leer Foundation for making a qualitative analysis of those elements of the programs of Early Childhood Development (ECD) that benefit the participants and their communities and cultures. The first article…

  8. Un caso de cefalea post traumática: consideraciones sobre clasificación, fisiopatología y tratamiento

    Microsoft Academic Search

    M. G. Meli

    2010-01-01

    Case report of a 35 year old woman with a post traumatic headache (PTH). Onset of the pain three years earlier, after falling on the ground, which required resuscitation. She had to be on mechanical ventilation for 11 days and suffered several contusions on the right frontal-temporal area of the skull. On discharge, she complained of a continuous bilateral tension

  9. Efectos de la confianza en la información contable sobre el coste de la deuda

    Microsoft Academic Search

    Gill de Albornoz Noguer Belén; Illueca Muñoz Manuel

    2006-01-01

    The aim of this paper is to examine the potentialeffects of trust in financial reporting on the costof debt of a wide sample of Spanish firms,corresponding to the period 1996-2002. To do so,we analyse whether auditor reputation has a significantimpact on the way investors use accruals fordecision-making. Particularly, an empirical analysisis carried out to test whether the pricing ofaccruals quality

  10. Algumas observações sobre o não verbal: neurociência da memória e clínica psicanalítica

    Microsoft Academic Search

    Flavia Sollero-de-Campos

    The neuroscience of memory may enrich our understan ding of psychoanalytic theory. Recent studies show that memory is a process activated by a retrieval cue. Freud and others had already shown that each memory is constructed, tran sformed, and expanded anew leading to new networks and change Therefore, it can expand an d create new meanings and psychic changes. These

  11. ESTADO E AGRICULTORES FAMILIARES: UMA ANÁLISE INTERPRETATIVA SOBRE O DESENVOLVIMENTO RURAL NO SUL DE MINAS GERAIS

    Microsoft Academic Search

    Patricia Aparecida Ferreira; Jose Roberto Pereira; Edgard Alencar; Ana Carolina Santana

    2008-01-01

    Este trabalho procurou identificar como os atores sociais vinculados à agricultura familiar (lideranças de produtores familiares, profissionais de ciências agrárias, autoridades municipais, pesquisadores e professores universitários) interpretam o papel do Estado para o desenvolvimento dessa categoria na Região Sul de Minas Gerais. Com relação à coleta de dados, utilizou-se a técnica \\

  12. INFORMACIN SOBRE EL EXAMEN IDIOMA MODERNO CONVOCATORIAS SEGUNDO CUATRIMESTRE 2013/14

    E-print Network

    Rey Juan Carlos, Universidad

    LIBRE TENDRÁS QUE SEGUIR EL PROCEDIMIENTO QUE APARECE EN LA SIGUIENTE PÁGINA WEB: http://miportal.urjc.es/cui/main/examenes/examenes.jsp deberán inscribirse a través de la aplicación de Idioma Moderno en el link: http://miportal.urjc.es/imoderno/jsp/alumno/login.jsp

  13. Notas sobre la variación morfológica de Ganoderma curtisii (Ganodermatales, Ganodermataceae) en México

    Microsoft Academic Search

    Mabel Gisela Torres-Torres; Laura Guzmán-Dávalos

    A macro and micromorphological study of selected Ganoderma curtisii specimens collected in Mexico were done. Traditional taxonomic methods were used, making dissections through a trajectory from the base to the border of the pileus. The macromorphological variation according to the state of maturation, presence or absence of shine and color of the pileus, and form, color and size of the

  14. ELEMENTOS PARA ORIENTAR UNA POLÍTICA ESTATAL SOBRE ALQUILER DE VIVIENDA URBANA EN COLOMBIA

    Microsoft Academic Search

    Samuel Jaramillo; Marcela Ibáñez

    2002-01-01

    El objetivo de este documento es el de contribuir a diseñar cursos de acción gubernamental en dos ejes: el de promover y activar el mercado de vivienda en alquiler en general y el de buscar criterios para diseñar instrumentos que permitan utilizar el alquiler en las acciones estatales de vivienda social. Uno de los graves obstáculos que existen actualmente para

  15. REFLEXÕES SOBRE A LOUCURA E A CIDADANIA NA DIMENSÃO DAS PRÁTICAS CORPORAIS DE LAZER

    Microsoft Academic Search

    Vitor de Souza Carneiro

    The current text looked for to evidence the importance of the practical physics with new meanings in the mental health. The modification of the practical physics for playful contributes in the constitution positive spaces of the leisure, possible fact for presenting as axle the fight for the citizenship and socialization of the users of the services of the mental health.

  16. Influência de fatores genéticos e ambientais sobre características reprodutivas do rebanho eqüino do Exército Brasileiro

    Microsoft Academic Search

    Vinício Aurélio Lagoas Campos; Concepta McManus; Beatriz Helena Fuck; Luiz Fernando Andrade da Silva; Helder Louvandini; Laila Talarico Dias; Rodrigo de Almeida Teixeira

    2007-01-01

    This study aimed to estimate genetic and phenotypic parameters for foaling interval (FI), age at first foaling (AFF), generation interval (GI), reproductive life (RL) and foaling date distribution in equines of four genetic groups: Brazilian Showjumper (BS), Thoroughbred (Th), Hanoverian (HAN) and No Defined Breed (NDB). Data collected from 1977 to 2002 was provided by a Brazilian Army herd. Models

  17. Efeito do estresse térmico e do exercício sobre parâmetros fisiológicos de cavalos do exército brasileiro

    Microsoft Academic Search

    Giane Regina Paludo; Concepta McManus; Renata Queiroz de Melo; André Granja Cardoso; Fabíola Peixoto da Silva Mello; Moryenne Moreira; Beatriz H. Fuck

    2002-01-01

    RESUMO - Os cavalos do exército brasileiro são usados em dias de exposição e, muitas vezes, submetidos a exercício intenso, que, aliado às condições climáticas do cerrado do Centro-Oeste brasileiro, resulta na necessidade de extrema aclimatação dos mesmos. O objetivo desse estudo foi determinar o efeito do estresse térmico e do exercício a que estão submetidas às raças de eqüinos

  18. La herpetofauna de la Atlántida: un ensayo crítico sobre paleobiología espacial

    Microsoft Academic Search

    BORJA SANCHIZ

    2002-01-01

    The Herpetofauna of Atlantis: A critical essay on spatial Paleobiology. The objective of Dynamic Chorology, within the biogeographical disciplines, is to determine the causes and processes responsible of dis- tributional range changes. Dynamic Chorology should be able to develop accurate models that account for the present ranges and their transformation rules, including predictive components that could be tested when ap-

  19. La Naturaleza Contradictoria de las Peliculas Hechas en Mexico Sobre la Revolucion Mexicana 

    E-print Network

    Garza, Alex Steve

    2010-10-12

    patriarcales. Este estudio es singular ya que analiza un gran n?mero de textos para poder dar un mejor panorama de c?mo permanecieron estas t?cnicas en las pel?culas hechas entre las d?cadas 1930-70. Dado que las pel?culas sonoras fueron las que le dieron...

  20. Los discursos sobre sexualidad en la obra de Alicia Gaspar de Alba 

    E-print Network

    Vivancos P?erez, Ricardo F

    2002-01-01

    chicanas / latinas que se identifican corno lesbianas o son percibidas corno lesbianas, pero que caen fuera de mis limites en este trabajo. " El caso de Ana Castillo merece especial atencion. Queda claro que no se identifica camo heterosexual, pero...

  1. Estudio Electroquímico del Ácido 3,4-Dihidroxifenilacético (DOPAC) Adsorbido sobre Oro

    Microsoft Academic Search

    Sylvia M. Esquenoni; Alicia E. Von Mengershausen; María G. Sustersic

    2007-01-01

    The objective of this study was to obtain knowledge on the behavior of acid 3,4 dihydroxyphenylacetic (DOPAC) as an adsorbate and electrochemical reagent adsorbed on gold. The redox reaction characteristic of the catechol ring allows the study of the substance adsorption under open circuit conditions. The step of the procedure include adsorption, rinsing with electrolyte, and making cyclic voltammetric scan

  2. Evaluación del impacto de un ensayo comunitario sobre el consumo de frutas y verduras en Colombia

    Microsoft Academic Search

    Gloria Esperanza Prada; Lucia Yalile Dubeibe-Blanco; Oscar F. Herrán; Martha Herrera-Anaya

    2007-01-01

    Objective. To evaluate the impact of an alimentary inter- vention on the frequency of consumption of fruits and veg- etables (FV) in the municipality of Girón, Santander, Colombia. Material and Methods. A community interven- tion was carried out over a ten-month period, where 66 families who use fourteen community homes (HC) received an alimentary intervention based on educational strategies. Seventy-three

  3. Departamento de Matematicas Matematicas (CC. Quimicas) Ejercicios sobre funciones elementales, limites y continuidad 2.

    E-print Network

    (e) t - log(3). c) Definir R = logr, S = logs. Entonces R = log(3) s + log(5) - log(3). d) Definir U = logu, V derecha) , debera tener el aspecto Figura 1: Pulsa el bot´on del asistente para crear gr´aficos Aparecer

  4. Efecto antimicrobiano in vivo de la infusión de Camellia sinensis sobre bacterias orales

    Microsoft Academic Search

    Hilda Moromi Nakata; Elba Martínez Cadillo; Margot Gutiérrez Ilave; Donald Ramos Perfecto; María E. Núñez Lizarraga; Jonny Burga Sánchez; Javier Tello; Isabel Trevejo

    In order to determine, in vivo antimicrobial effect of Camellia sinensis infusión (green Tea), as a mouthwash at 10 %; not stimulated saliva of 32 seemingly healthy people was collected: 1) Before mouthwash, 2) immediately after, and 3) after 30 minutes. The samples were spread in Agar Tripticasa Soy Bean and Agar Mitis Salivarius Bacitracina; then proceeded to the recount

  5. Influencia del vendaje neuromuscular sobre la presión plantar durante la marcha

    Microsoft Academic Search

    P. Pérez Soriano; J. Gascó López de Lacalle; M. A. Merino Josa; A. Sandá Meijide; R. Moll Puigcerver; V. Castillo Antúnez

    2010-01-01

    Application of the neuromuscular bandage has frequently been used in sports and rehabilitation. There are several benefits associated with this bandage, although its influence and effects on the plantar pressure pattern have not been analyzed. In this sense, our study has analyzed plantar pressure in 5 foot zones with the pedobarographic system Biofoot IBV® 6.0 as well as cadence and

  6. Consideraciones sobre la Ansiedad en la Primera Infancia (Considerations Concerning Anxiety in Early Infancy).

    ERIC Educational Resources Information Center

    Muller, Elsa

    The results of an experience obtained while working with children in the early stages of infancy are presented. They are basically observations taken of a child's reaction to sudden changes, particularly separation from its mother. Anxiety was observed in these infants in diverse circumstances; in some cases it was at a normal level and in others…

  7. Tpicos sobre programao de computadores como mtodo educativo no jardim-de-infncia

    E-print Network

    Paris-Sud XI, Université de

    apoiam-se fortemente na teoria construtivista de Jean Piaget (o que não é de espantar, já que Papert trabalhou com Piaget na Suíça), pese as necessárias diferenças que apresentam. Contudo, o aspecto essencial

  8. Efecto de Steinernema sp. sobre larvas de Ancognatha scarabaeoides (Coleoptera: Scarabaeidae) en condiciones de laboratorio e

    Microsoft Academic Search

    Luis Alberto Peña Villamil; Leonel Cultid

    2006-01-01

    The effect of Steinernema sp. entomonematode on Ancognatha scarabaeoides grubs (Coleopter: Scarabaeidae) in laboratory and greenhouse conditions Organisms such as parasitic insect nema- todes have played a fundamental role as biological control tools in integrated pest management programmes (IPM) during the last decade due to their broad world-wide distribution, selectivity and effectiveness in controlling insects. The present work was aimed

  9. Creación y desarrollo de agroredes como estrategia de desarrollo rural en áreas periurbanas, el caso de la localidad de Sumapaz \\/ Bogotá-Colombia

    Microsoft Academic Search

    Maria del Pilar Leal Londoño

    2008-01-01

    Bogotá una ciudad cuyo suelo rural corresponde a 78.00 hectáreas que representan poco mas del 75 por ciento de todo el territorio, pero en donde el 25 por ciento restante que corresponde a suelo urbano alberga una alta densidad habitacional, consecuencia de la concentración de las actividades económicas que se contraponen a la ausencia de oportunidades relacionadas con la actividad

  10. Irrigation Monitoring with Soil Water Sensors (Spanish) 

    E-print Network

    Enciso, Juan; Porter, Dana; Peries, Xavier

    2007-07-25

    campo y el punto de marchitamiento permanente. Generalmente, este par?metro se expresa en pulgadas de agua por pie de profundidad del suelo. ?ste depende de factores tales como la textura del suelo, densidad aparente y estructura Tabla 1. El contenido...

  11. Atlas y Libro Rojo de la Flora Vascular Amenazada de Espaa Rhynchospora modesti-lucennoi Castrov.

    E-print Network

    Herrera, Carlos M.

    -lucennoi Castrov. Especie no protegida legalmente que vive en suelos oligotrofos y frescos, en proceso de regresión (Cádiz y Huel- va) y noroeste de África (Argelia y Marruecos). En Pontevedra también existía una polinización anemófila. Hábitat Vive en suelos higroturbosos. Molinia caerulea, Lobelia urens, Eleocharis

  12. Introduccin Un nmero creciente de estudios est

    E-print Network

    Traveset, Anna

    como inhibiéndolas. Además, estas interacciones planta-biota del suelo tienen el potencial de modificar limitado debido a los efectos inhibidores de la biota del suelo con la que interactúa; en Norte América, sin embargo, esta planta es invasora debido a que la biota con la que interactúa no inhibe su

  13. Invertebrate fauna associated with Torpedograss, Panicum repens (Cyperales: Poaceae), in Lake Okeechobee, Florida, and prospects for biological control

    SciTech Connect

    Cuda, J.P.; Dunford, J.C.; Leavengood, J.M. Jr. [University of Florida, Entomology and Nematology Department, Gainesville, FL 32611-0620 (United States)

    2007-03-15

    Torpedograss, Panicum repens L., is an adventive, rhizomatous grass species that has become an invasive weed of terrestrial, wetland, and aquatic environments in tropical and subtropical regions worldwide. Until recently, strategies for controlling torpedograss in the USA have focused almost exclusively on mechanical and chemical methods, either alone or in combination, with varied results. A survey of the arthropods and nematodes currently associated with the plant in Lake Okeechobee, Florida, was conducted as part of a feasibility study to determine whether torpedograss is an appropriate target for a classical biological control program. Overall, approximately 4,000 arthropods and 400 nematode specimens were collected. Sweep, clipped vegetation, and soil core samples were dominated by representatives of the arthropod orders Hemiptera, Hymenoptera, Diptera, and Acari. Lesion nematodes of the genus Pratylenchus were commonly associated with the roots of torpedograss. None of the organisms collected were torpedograss specialists. Although classical biological control of torpedograss is feasible based on the extent of the infestation, economic losses, resistance to conventional controls, and the report of a potentially host specific natural enemy in India, the botanical position of this grass weed will require a formal risk assessment before proceeding with a classical biological control program. (author) [Spanish] La conota, Panicum repens L., es una especie foranea de pasto que produce rizomas que ha convertido en ser una maleza invasora de ambientes terrestres, pantanosos y acuaticos en regiones tropicales y subtropicales en todo el mundo. Hasta hace un tiempo reciente, las estrategias para controlar conota en los EEUU eran enfocadas casi exclusivamente en los metodos mecanicos y quimicos, solos o en combinacion, con resultados variables. Un muestreo de los artropodos y nematodos asociados corrientemente con esta planta en el Lago de Okeechobee, Florida, fue realizado como parte de un estudio de factibilidad para determinar si conota es una candidata apropiada para un programa de control biologico clasico. En general, especimenes de aproximadamente unos 4,000 artropodos y unos 400 nematodos fueron recolectados. Muestras recolectadas pasando una red sobre vegetacion mezclada, cortando la vegetacion y tomando centros del suelo fueron dominados por representantes de artropodos de los ordenes de Hemiptera, Hymenoptera, Diptera, y Acari. Nematodos en el genero Pratylenchus, que causan lesiones sobre tejido, fueron asociados regularmente con las raices de conota. Ninguno de los organismos recolectados eran especialistas sobre conota. Aunque el control biologico clasico de la conota es factible basado sobre la magnitud de la infestacion, las perdidas economicas, la resistencia hacia los metodos de control convencionales y el informe en la India de un posible enemigo natural especifico a esta planta, la posicion botanica de este pasto maleza requiere una evaluacion de riesgo economico formal antes de continuar con un programa de control biologico clasico. (author)

  14. Estudio de la influencia de la refrigeracion con aire de forma natural e inducida en el comportamiento de instalaciones fotovoltaicas

    NASA Astrophysics Data System (ADS)

    Mazon Hernandez, Rocio

    The aim is to analyse the negative influence of high panel temperatures on electrical production when they are placed on steel roofs of industrial buildings and greenhouse roofs. Different configurations have been tested in order to allow cooling of photovoltaic panels to decrease panel temperature and improve electrical performance. To research this problem two experimental facilities have been built. The first facility includes two panels fixed on a structure. A panel is integrated on a parallel steel plate which does not allow sufficient cooling. Between both surfaces, there is an open air channel in which an air flow is created by the chimney effect thus cooling the panel by natural convection or inducing air, using a fan, by forced convection. The other panel has not any plate underneath it and is used as a referent. The electrical behaviour of the integrated panel has been studied for different air gaps and induced velocities, being also compared with the reference panel. An experimental model was developed to establish correlations which allow determine the panel temperature depending on the influential variables on the cooling ability. This research also analyses the data of a working solar plant, with the same panel model, obtaining the correlations between electrical variables and panel temperature. A comparison with the electrical behaviour in the experimental facility and the solar plant is also presented. The second experimental facility is a replica of a photovoltaic greenhouse. It consists of four photovoltaic panels placed on the plastic roof, providing an open and divergent channel between both surfaces thus creating an air flow by natural convection. This research studies the effect of high temperatures within the greenhouse which is transferred by the roof and thus affects the electrical production. In addition, two air gaps were used and the effect of adding insulating material to the plastic roof was studied. The electrical variables of the panels are analysed to compare and select the best configuration. The presented research provides a deep knowledge of how they work as well as information and results for an improvement in future designs of building integrated photovoltaic systems. Este estudio se centra en analizar la influencia negativa de la temperatura en la produccion electrica de paneles fotovoltaicos al estar emplazados sobre cubierta de acero, como sucede en naves industriales y sobre un invernadero. Se estudian diferentes configuraciones que permitan refrigerar los paneles, reduciendo su temperatura y mejorar su rendimiento. Para abordar este problema, se han construido dos instalaciones experimentales, fieles a plantas solares en funcionamiento. Una instalacion engloba dos paneles fotovoltaicos sobre estructura fija al suelo. Uno de los paneles esta integrado sobre una superficie paralela y metalica. Entre ambas superficies existe un espacio que posibilita circular aire, permitiendo refrigerar el panel por conveccion natural, o conveccion forzada impulsando el aire con un ventilador. El otro panel, libre por su cara posterior y se ha considerado de referencia. Se ha estudiado el comportamiento del panel integrado sobre cubierta para diferentes secciones de aire y velocidades inducidas, comparandolo con el panel de referencia. Se ha desarrollado un modelo experimental que nos permite determinar la temperatura del panel en funcion de las variables que influyen en su refrigeracion. Adicionalmente, se han analizado los datos de una planta solar en funcionamiento, con paneles de igual caracteristicas, obteniendo correlaciones entre la temperatura del panel y las variables electricas y comparandolos con las obtenidas en la instalacion experimental. La segunda instalacion experimental reproduce parte de una instalacion solar sobre un invernadero, formada por cuatro paneles fotovoltaicos colocados sobre el plastico del invernadero, existiendo un canal divergente entre ambas superficies. Se estudia la influencia de las altas temperaturas en el interior del invernadero sobre la produccion electric

  15. Impact of vegetation types on soil organic carbon stocks SOC-S in Mediterranean natural areas

    NASA Astrophysics Data System (ADS)

    Parras-Alcántara, Luis; Lozano-García, Beatriz; Cantudo-Pérez, Marta

    2015-04-01

    Soils play a key role in the carbon geochemical cycle because they can either emit large quantities of CO2 or on the contrary they can act as a store for carbon. Agriculture and forestry are the only activities that can achieve this effect through photosynthesis and the carbon incorporation into carbohydrates (Parras-Alcántara et al., 2013). The Mediterranean evergreen oak Woodland (MEOW - dehesa) is a type of pasture with scattered evergreen and deciduous oak stands in which cereals are often grown under the tree cover. It is a system dedicated to the combined production of Iberian swine, sheep, fuel wood, coal and cork as well as to hunting. These semi-natural areas still preserve some of the primitive vegetation of the Mediterranean oak forests. The dehesa is a pasture where the herbaceous layer is comprised of either cultivated cereals such as oat, barley and wheat or native vegetation dominated by annual species, which are used as grazing resources. These Iberian open woodland rangelands (dehesas) have been studied from different points of view: hydrologically, with respect to soil organic matter content, as well as in relation to gully erosion, topographical thresholds, soil erosion and runoff production, soil degradation and management practices…etc, among others. The soil organic carbon stock capacity depends not only on abiotic factors such as the mineralogical composition and the climate, but also on soil use and management (Parras et al., 2014 and 2015). In Spanish soils, climate, use and management strongly affect the carbon variability, mainly in soils in dry Mediterranean climates characterized by low organic carbon content, weak structure and readily degradable soils. Hontoria et al. (2004) emphasized that the climate and soil use are two factors that greatly influence carbon content in the Mediterranean climate. This research sought to analyze the SOC stock (SOCS) variability in MEOW - dehesa with cereals, olive grove and Mediterranean oak forest with different vegetation types (Quercus suber, Quercus ilex, Quercus faginea, Pinus pinaster and Pinus pinea) in The Cardeña-Montoro Natural Park, a nature reserve that consists of a 38,449 ha forested area in southern Spain. Sixty-eight sampling points were selected in the study zone. Each sampling point was analyzed as soil control section with different depth increments (0-25, 25-50, 50-75 and 75-100 cm). The studied soils were classified as Cambisols and the major goal of this research was to study the SOCS variability at regional scale. The total SOCS in The Cardeña-Montoro Natural Park was higher in MEOW with olive grove (111,69 Mg ha-1) and lower in MEOW with Quercus faginea (93,57 Mg ha-1). However, when the top soil (superficial section control) was analyzed, the SOCS was the highest in MEOW with olive grove (70,12 Mg-1) and the lowest in MEOW with Pinus (47,82 Mg ha-1). This research is a preliminary assessment for modeling SOCS at the regional level in Mediterranean natural areas. References Hontoria, C., Rodríguez-Murillo, J., and Saa, A.: Contenido de carbono orgánico en el suelo y factores de control en la España Peninsular, Edafología, 11, 149-155, 2004. Parras-Alcántara, L., Díaz-Jaimes, L., and Lozano-García, B: Organic farming affects C and N in soils under olive groves in Mediterranean areas, Land Degrad. Develop., in press, available online: in Wiley Online Library (wileyonlinelibrary.com), http://dx.doi.org/10.1002/ldr.2231, 2013. Parras-Alcántara, L., Díaz-Jaimes, L., Lozano-García, B., Fernández Rebollo, P., Moreno Elcure, F., Carbonero Muñoz, M.D.: Organic farming has little effect on carbon stock in a Mediterranean dehesa (southern Spain). Catena 113 (2014) 9-17. http://dx.doi.org/10.1016/j.catena.2013.09.002 Parras-Alcántara, L., Díaz-Jaimes, L., and Lozano-García, B.: Management effects on soil organic carbon stock in Mediterranean open rangelands -- treeless grasslands, Land Degrad. Develop., in press, available online: in Wiley Online Library (wileyonlinelibrary.com), http://dx.doi.org/10.1002/ldr.2269, 2015.

  16. Could be the future climate change an opportunity for the winegrowers? The case study of Aglianico wine in southern Italy.

    NASA Astrophysics Data System (ADS)

    Bonfante, Antonello; Basile, Angelo; Dragonetti, Giovanna; De Lorenzi, Francesca; De Mascellis, Roberto; Gambuti, Angelita; Giorio, Pasquale; Guida, Giampiero; Manna, Piero; Minieri, Luciana; Oliva, Marco; Orefice, Nadia; Terribile, Fabio

    2015-04-01

    Water deficit is a limiting factor to yield production and crop adaptation to future climate conditions. This is true for crops addressed mainly for biomass production (e.g. maize, wheat, etc.) but not for those where the quality is relevant. Specifically, in grapevine water stress (mid or limited) - occurring during specific phenological phases - is a factor to produce good quality wines. It induces for example the production of anthocyanins and aroma precursors. Therefore, the water stress, due to the future increase of temperature and the rainfall decrease, could represent an opportunity to increase winegrowers' incomes. The study was carried out in Campania region (Southern Italy), in an area vocated to high quality wines production (ZOVISA project: Viticultural zoning at farm scale) The study was realized in two different soils (calcisol and cambisol), under the same climate, on Aglianico cultivar, standard clone population on 1103 Paulsen rootstocks placed along a slope of 90 m length with 11% of gradient. The agro-hydrological model SWAP was calibrated and applied to estimate soil-plant water status at the various crop phenological phases for three vintages (2011-2013). Crop water stress index (CWSI) - estimated by the model - was related to physiological measurements (e.g leaf water potential), grape bunches measurements (e.g. sugar content) and wine quality (e.g. tannins). For both soils, the correlation between measurements and CWSI were high (e.g. -0.97** with sugar; 0.895* with anthocyanins in the skins). Then, the model was applied to future climate condition (2021-2051) obtained from statistical downscaling of GCM in order to estimate the effect of the climate on CWSI and hence on vine quality. The results show that the effects of the climate change on the vine quality is dependent by the soil, being relevant to the cambisol and less pronounced to the calcisol, with an expected improvement of wine quality in the cambisol.

  17. Heavy metal sorption and desorption capacity of soils containing endogenous contaminants.

    PubMed

    Covelo, Emma Fernández; Vega, Flora Alonso; Andrade, M Luisa

    2007-05-01

    Soils on serpentinites in some regions of northwestern Spain have been the subject of agricultural management practices involving the use of fertilizers and various types of organic waste containing heavy metals. Although such practices have facilitated crop growth, they have also raised the natural contents in heavy metals of the soils. In this work, three ferralic Cambisols and another three mollic Leptosols with high Cr and Ni contents were used to study competitive sorption and desorption of six heavy metals via K(d100), which was employed as a measure of the ability of the soils to adsorb and retain each metal. Lead was found to be the metal sorbed and retained to the greatest extent, and Cd, Ni and Zn those sorbed and retained in the smallest amounts. Although the ferralic Cambisols were found to contain greater amounts of natural heavy metals, they exhibited an increased ability to adsorb and retain the body of metals relative to the mollic Leptosols by effect of their increased contents in clay and Fe, Mn and Al oxides, in addition to their higher ion-exchange capacity. Based on the results, Pb and Cu are strongly bound, and Zn, Cd and Ni weakly bound, to the soils. The ferralic Cambisols exhibited an increased capacity to adsorb and retain Cd, Ni, Zn and--especially--Cr than the mollic Leptosols; the latter, however, proved more effective in adsorbing and retaining Cu and Pb by virtue of their increased organic matter contents. Copper sorption and retention, and Pb retention, were found to be correlated with the content in organic matter and that in vermiculite--which was only present in the mollic Leptosols--in the clay fraction. PMID:17092646

  18. Effect of long-term phosphorus fertilization on soil Se and transfer of soil Se to crops in northern Japan.

    PubMed

    Altansuvd, Javkhlantuya; Nakamaru, Yasuo M; Kasajima, Shinya; Ito, Hirotake; Yoshida, Hozumi

    2014-07-01

    Phosphorus (P) fertilizer can potentially serve as a source for Se accumulation in croplands. Furthermore, it has been reported that the addition of P fertilizer to soil may enhance Se availability. Japanese agricultural soils are typically enriched in P as a result of long-term, excessive P fertilization. Therefore, we conducted a three-year field experiment in order to evaluate the effect of P fertilization on the Se content of soils and crops. Potato, wheat and barley were cultivated with and without P fertilization at two field sites in Hokkaido (northern Japan) with different levels of historical P accumulation. The first field site consisted of an Andosol soil with low available P and the second site, a Cambisol soil with high available P. The three years of continuous P fertilization over the course of the experiment did not result in a significant increase in the Se content of soils or plants. The Se content of soils and plants, however, was higher in soil samples from the Cambisol field site than from the Andosol field site, and total soil Se was significantly correlated with available soil P. Soluble soil Se and the soil-plant transfer factor for Se were not affected by P fertilization. Thus, we concluded that the higher plant Se content at the Cambisol field site was primarily due to the higher levels of accumulated Se in the soil at the site and that historical excess P fertilization typical of agricultural soils in Japan contributes to increased Se uptake by crops. PMID:24875865

  19. Adsorption of glyphosate and aminomethylphosphonic acid in soils

    NASA Astrophysics Data System (ADS)

    Rampazzo, N.; Rampazzo Todorovic, G.; Mentler, A.; Blum, W. E. H.

    2013-03-01

    The results showed that glyphosate is initially adsorbed mostly in the upper 2 cm. It is than transported and adsorbed after few days in deeper soil horizons with concomitant increasing content of its metabolite aminomethylphosphonic acid. Moreover, Fe-oxides seem to be a key parameter for glyphosate and aminomethylphosphonic adsorption in soils. This study confirmed previous studies: the analysis showed lower contents of dithionite-soluble and Fe-oxides for the Chernozem, with consequently lower adsorption of glyphosate and aminomethylphosphonic as compared with the Cambisol and the Stagnosol.

  20. Transport of four pharmaceuticals in different horizons of three soil types

    NASA Astrophysics Data System (ADS)

    Kodesova, Radka; Svatkova, Paula; Klement, Ales; Jaksik, Ondrej; Golovko, Oksana; Fer, Miroslav; Kocarek, Martin; Nikodem, Antonin; Grabic, Roman

    2015-04-01

    Soil structure, which varies in different soil types and the horizons of these soil types, has a significant impact on water flow and contaminant transport in soils. Transport of many contaminants is in addition strongly influenced by their sorption on soil particles. Transport of four pharmaceuticals (sulfamethoxazole, trimethoprim, atenolol and carbamazepine) was studied in soil columns (a diameter of 10.5 cm and a height of 13 cm) taken from all diagnostic horizons of three different soil types (Haplic Luvisol, Greyic Phaeozem and Haplic Cambisol). The irrigation by water contaminated by a mixture of all four compounds followed by ponding infiltration of distilled water was simulated and water outflow and solute concentrations from the bottom of the soil sample was monitored in time. The highest infiltration rates were observed for soil samples from the Bt horizons of the Greyic Phaeozem that exhibited prismatic structure, followed by rates observed in the Ap horizons of the Haplic Luvisol, Greyic Phaeozem and Haplic Cambisol (due to their granular soil structure and presence of root channels). The lowest infiltration rate was measured for the Bw horizon of the Haplic Cambisol, which had a poorly developed soil structure and a low fraction of macropores. Compound discharge was however also highly affected by their sorption on solids. The highest mobility was observed for sulfamethoxazole followed by carbamazepine atenolol and trimethoprim, which corresponds to measured sorption isotherms. Mobility of ionizable compounds in different soil samples was influenced by pH (i.e. degree and form of their ionization) and sites available for absorption. Mobility of sulfamethoxazole decreased with decreasing pH (i.e. the largest sorption measured in horizons of the Haplic Cambisol). While mobility of atenolol and trimethoprim decreased with increasing base cation saturation, and with increasing organic matter content for carbamazepine. As result of both affects (i.e. soil structure and compounds' sorption) the highest discharge of all compounds was observed from the Ap horizon of the Greyic Phaeozem followed by compound discharge from the C horizons of the Greyic Phaeozem and the C and Bt2 horizons of the Haplic Luvisol. Acknowledgement: The authors acknowledge the financial support of the Czech Science Foundation (Project No. 13-12477S, Transport of pharmaceuticals in soils). References: Kodesova, R., Grabic, R., Kocarek, M., Klement, A., Golovko, O., Fer, M., Nikodem, A., Jaksik, O., Pharmaceuticals' sorptions relative to properties of thirteen different soils. Science of the Total Environment 511 (2015) 435-443.

  1. Low intensity ultrasonic vibration amplitude as a tool for characterisation water stable soil aggregates

    NASA Astrophysics Data System (ADS)

    Mentler, Axel; Schomakers, Jasmin; Mayer, Herwig

    2013-04-01

    Ultrasonic dispersion of soil aggregates is a useful method to determine soil aggregate stability. Commercially available ultrasonic devices, however, operate at relatively high ultrasonic power, which hampers the analysis of less stable aggregates. Ultrasonic power is controlled in these devices with rather low accuracy and is used for correlation with the process of soil disaggregation. Self-developed ultrasonic equipment remedies these shortcomings by using low intensity ultrasonic vibrations. The vibration amplitude rather than the ultrasonic power is used to control the magnitude of loading in the dispersion experiment. Under well-defined geometrical conditions, the vibration amplitude strongly correlates with the magnitude of the acoustic pressure waves emitted into the fluid that cause disaggregation of soil particles. Samples of aggregates 2 000 - 250 ?m of a degraded loamy silt chernozem, a loamy clay cambisol and a loamy sand cambisol had been collected under different tillage regimes in Austria: conventional tillage (CT) with mechanical weed control, reduced tillage (RT) and no tillage (NT) with inter cropping in winter. The cavitation threshold of gas saturated de-ionized water was determined at an ultrasonic vibration amplitude of 0.5-0.6 µm at 20 kHz frequency (acoustic pressure 0.9-1.1 bar) with a diode array spectrophotometer. Subsequent experiments were performed near this limit to be able to characterize weakly aggregated soils. Measuring soil aggregate stability (SAS) according to DIN norm showed greater aggregate stability of cambisol than of chernozem, however, could hardly show influences of tillage. Better results were obtained with the USAS (ultrasound soil aggregate stability) method, which on the one hand validated the SAS results. On the other hand it was possible to show an influence of soil tillage on aggregate stability, which significantly decreased from NT to RT and to CT for both soil types. The measurements correlated with total organic carbon content in aggregates that was greater in no tillage than in conventional tillage and larger in cambisol than in highly degraded chernozem. The data suggest that the dynamic of soil dispersion depends on the absorbed ultrasonic energy and the vibration amplitude. Promising results were obtained at ultrasonic vibration amplitudes of 0.5 ?m and 2 ?m, respectively. Dispersion experiments at 5 ?m did not allow for a differentiation between soil types nor tillage variant, which indicates that low intensity vibrations should be used to monitor differences in aggregate stabilities.

  2. Memorias del Segundo Simposio Internacional Sobre Polticas, Planificacin y Economa de los Programas de Proteccin Contra Incendios Forestales: Una Visin Global Memorias del Segundo Simposio Internacional Sobre Polticas, Planificacin y Economa de los Progra

    E-print Network

    Standiford, Richard B.

    , socials, financieras y medioambientales han dado lugar a una amplia gama de sistemas de organización de la históricas, políticas, sociales, medioambientales y financieras han dado lugar a una amplia gama de sistemas dar una visión de este problema que pueda ser de utilidad cuando se estén adoptando estas decisiones

  3. Memorias del Segundo Simposio Internacional Sobre Polticas, Planificacin y Economa de los Programas de Proteccin Contra Incendios Forestales: Una Visin Global Memorias del Segundo Simposio Internacional Sobre Polticas, Planificacin y Economa de los Progra

    E-print Network

    Standiford, Richard B.

    formulación de modelos y sistemas analíticos de ecuaciones diferenciales. A. M. Girshim propone un ejemplo de este modelo, que describe los procesos en 3D de cambio de temperatura, e implica sistemas de ecuaciones sistema de control de la lucha contra los incendios forestales es uno de los mayores problemas de la

  4. Memorias del Segundo Simposio Internacional Sobre Polticas, Planificacin y Economa de los Programas de Proteccin Contra Incendios Forestales: Una Visin Global Memorias del Segundo Simposio Internacional Sobre Polticas, Planificacin y Economa de los Progra

    E-print Network

    Standiford, Richard B.

    combustible. El conocimiento de los modelos forestales de gestión de quemas prescritas, permite la aplicación costes de forma comparada entre los sistemas mecánicos y el uso de quemas prescritas, con especial se aborda el estudio de los costes entre ambos sistemas, aportando una matriz de decisión como

  5. Memorias del Segundo Simposio Internacional Sobre Polticas, Planificacin y Economa de los Programas de Proteccin Contra Incendios Forestales: Una Visin Global Memorias del Segundo Simposio Internacional Sobre Polticas, Planificacin y Economa de los Progra

    E-print Network

    Standiford, Richard B.

    toma de decisiones en funcionamiento en el momento del incidente. Las investigaciones de los incendios contexto más amplio de toma de decisiones en el que tiene lugar la gestión del incidente. La investigación decisiones para desarrollar un modelo que descomponga y reconstruya los procesos de decisión en incendios

  6. Memorias del Segundo Simposio Internacional Sobre Polticas, Planificacin y Economa de los Programas de Proteccin Contra Incendios Forestales: Una Visin Global Memorias del Segundo Simposio Internacional Sobre Polticas, Planificacin y Economa de los Progra

    E-print Network

    Standiford, Richard B.

    Forestales: Una Visión Global Análisis Comparativo Entre los Sistemas Antiincendios Forestales en Sicilia. Destacamos que existe gran dificultad para recopilar determinadas informaciones importantes en materia de realizamos puede ayudar a establecer líneas comunes de trabajo, mejorando los sistemas mutuos de lucha contra

  7. Memorias del Segundo Simposio Internacional Sobre Polticas, Planificacin y Economa de los Programas de Proteccin Contra Incendios Forestales: Una Visin Global Memorias del Segundo Simposio Internacional Sobre Polticas, Planificacin y Economa de los Progra

    E-print Network

    Standiford, Richard B.

    J. Levy5 Resumen Se describe un algoritmo que calcula rápidamente los tiempos mínimos de viaje entre pueden tardar minutos, cuando no horas, para calcular el tiempo de viaje de cada recurso, lo que resulta incontrolados es la estimación exacta de los tiempos de viaje de los recursos de extinción en tierra de un lugar

  8. Memorias del Segundo Simposio Internacional Sobre Polticas, Planificacin y Economa de los Programas de Proteccin Contra Incendios Forestales: Una Visin Global Memorias del Segundo Simposio Internacional Sobre Polticas, Planificacin y Economa de los Progra

    E-print Network

    Standiford, Richard B.

    incendio. Esta valoración debe contemplar: a) El valor comercial original del bosque (madera, turismo en este trabajo se describe el uso de técnicas geostadísticas en la definición de superficies sitios, distribuidos al azar, dentro de un área de 1400 ha. La definición de superficies continuas fue

  9. Memorias del Segundo Simposio Internacional Sobre Polticas, Planificacin y Economa de los Programas de Proteccin Contra Incendios Forestales: Una Visin Global Memorias del Segundo Simposio Internacional Sobre Polticas, Planificacin y Economa de los Progra

    E-print Network

    Standiford, Richard B.

    una teoría contable del incendio que identifique y valore el daño económico total que se espera evitar con origen en el coste de la lucha contra incendios. La teoría contable que se sigue responde a los

  10. Memorias del Segundo Simposio Internacional Sobre Polticas, Planificacin y Economa de los Programas de Proteccin Contra Incendios Forestales: Una Visin Global Memorias del Segundo Simposio Internacional Sobre Polticas, Planificacin y Economa de los Progra

    E-print Network

    Standiford, Richard B.

    noviembre, de Montes reconoce la función social que desempeñan los mismos, tanto por ser fuente de recursos, Ordenación del Territorio y Vivienda. Gobierno de Navarra. Avenida del ejército, 2. 31002, Navarra, España. 3

  11. VISITA AO MUSEU DE LOUCURA: UMA EXPERIÊNCIA DE APRENDIZAGEM SOBRE A REFORMA PSIQUIÁTRICA VISITING THE MUSEUM OF MADNESS: THE EXPERIENCE OF LEARNING ABOUT THE PSYCHIATRIC REFORM VISITA AL MUSEO DE LA LOCURA: UNA EXPERIENCIA DE APRENDIZAJE SOBRE LA REFORMA PSIQUIÁTRICA

    Microsoft Academic Search

    Eline Mascarenhas Cotta; Fabiano de Almeida Célio

    The Museum of Madness in the landscape of the Minas Gerais State is a place where art, history and memory disclose the differences about the Psychiatry approach since the beginning of the last century till nowadays. A qualitative study with 39 nursing undergraduate students was developed, aiming to identify the meaning of the visit to the Museum of Madness. The

  12. BIOTROPICA 36(2): 184195 2004 Soil Microbial Dynamics in Costa Rica: Seasonal and

    E-print Network

    Cleveland, Cory

    -poor oxisols and nutrient-rich mollisols) to inves- tigate seasonal changes in the size and activity tropicales hu´medos en el sudoeste de Costa Rica (Peni´nsula de Osa). En los suelos infe´rtiles (oxisoles

  13. Spatial Predictions of Cover Attributes of Rangeland Ecosystems Using Regression Kriging and Remote Sensing

    E-print Network

    rangeland attributes (percent cover of shrubs, bare ground, and cheatgrass [Bromus tectorum L cobertura de arbustos, suelo desnudo y cheatgrass [Bromus tectorum L.]) en un a´rea de estudio en el sur de

  14. UN REGALO PARA HISTORIA. A CMERA DE UM "TIGRE DO SAARA" RETRATA TEMPOS DE ESCURIDO NA REPBLICA ORIENTAL DEL URUGUAY.

    E-print Network

    Paris-Sud XI, Université de

    González. El fotógrafo nacido en Marruecos en la época del protectorado español, llegó a Uruguay como sacar la foto. Cuando el inspector José Luis Tellechea me vió disparó su revólver. Yo me tiré al suelo

  15. elirden2012 elirdbrevemente

    E-print Network

    DÁFRICA MADAGASCAR INDONESIA VIETNAM POLINESIA FRANCESA PERÚ BOLIVIA BRASIL MARTINICA MARRuECOS MALÍ NÍGER Gu día y aún más que ayer, se enfrentan los países en desarrollo: cambio climático, degradación del suelo

  16. IRD -INFORME DE ACTIVIDADES 2013 INVESTIGACIONES DE EXCELENCIA ORIENTADAS HACIA EL SUR

    E-print Network

    ); riesgos, vulnerabilidades y su impacto en los Andes (Rivia); suelos, aguas, zonas costeras y sociedades vegetal (Marruecos, Rabat); · Cefirse, Célula franco-india de investigación en ciencia del agua (India

  17. Institut de recherche pour le dveloppement informe de actividades 2012

    E-print Network

    VIETNAM POLINESIA FRANCESA PERÚ BOLIVIA BRASIL MARTINICA MARRuECOS MALÍ NÍGER GuAYANA FRANCESA Bu que ayer, se enfrentan los países en desarrollo: cambio climático, degradación del suelo, conservación

  18. Ao XI, N3 / 2002 Septiembre -Diciembre

    E-print Network

    Espigares, Tíscar

    floración otoñal, endémico del sur de la Península Ibérica y Norte de África (Argelia y Marruecos). En suelo #12;Año XI, Nº3 / 2002 Septiembre - Diciembre arcilloso. Ambas poblaciones se encuentran dentro de

  19. 109Agrociencia. (2006) Vol. X N 2 pg. 109 -124 FORESTACIN EN PASTIZALES: HACIA UNA VISIN INTEGRAL DE

    E-print Network

    Jackson, Robert B.

    2006-01-01

    /03/06 Aceptado: 25/10/06 1 Grupo de Estudios Ambientales ­ IMASL, Universidad Nacional de San Luis & CONICET mayoría de los pastizales de la región acidifican el suelo y en algunos casos el agua de los arroyos

  20. Investigacin Centro de Investigacin y de Estudios Avanzados del Instituto Politcnico Nacional

    E-print Network

    moleculares microbianos en suelos. Ana Carmela Ramos Valdivia Biotecnología del metabolismo secundario y la y de plantas de especies americanas y su producción a nivel de biorreactor. Graciano Calva Calva

  1. Influência do treinamento físico sobre parâmetros do eixo hipotála- mo-pituitária-adrenal de ratos administrados com dexametasona

    Microsoft Academic Search

    J. Rodrigo Pauli; José Leme; Daniel Crespilho; M. Alice; Gustavo Rogatto; Eliete Luciano

    Influence of physical training on hypothalamo-pituitary-adrenal axis parameters of rates administered with dexametasone The aim of present study was to investigate the influence of acute and chronic physical exercise on the hypothalamo-pituitary-adrenal axis in Wistar rats administered with dexamethasone. Young Wistar rats were divided into four groups: sedentary control (CS), sedentary dexametha- sone (DxS), trained control (CT) and trained dexamethasone

  2. General Information about Learning Disabilities (Fact Sheet Number 7) = Informacion General sobre Impedimentos en el Aprendizaje (Fact Sheet Number 19).

    ERIC Educational Resources Information Center

    Interstate Research Associates, Inc., Washington, DC.

    This fact sheet providing general information about learning disabilities is presented in both English and Spanish versions. It begins with the federal definition of learning disabilities and a discussion of its implications followed by estimates of incidence. Typical characteristics of students with learning disabilities are then summarized as…

  3. Efecto de la meniscectomía acromioclavicular sobre el dolor residual en la luxación acromioclavicular grado III o mayor

    Microsoft Academic Search

    Juan David Castillo Mejía; Juan Manuel Herrera Arbeláez; Oscar Eduardo Reyes; Juan Carlos López; Carlos Leal Contreras; Residente de Ortopedia; Juan Manuel Herrera; Postgrado de Ortopedia

    2009-01-01

    In order to compare the prevalence of post-surgical pain in patients who undergone a meniscal extraction during coracoclavicular repair with those who didn't have it after a grade III or worse acromio-clavicular joint dislocation, we did make a transverse cohort study on 25 patients between January 2005 and April 2007 at Clínica Universitaria El Bosque. Fifteen patients were menisectomized and

  4. Análise de metodologias de pesquisa sobre utilização de assentos de segurança infantil: lições de um projeto piloto

    Microsoft Academic Search

    Sergio Ricardo L. de Oliveira; Maria Dalva de B. Carvalho; Rosângela Getirana Santana; Camila Hibari Kawazoe; Eduardo Quirino dos Santos; Fernanda Cabrera de Oliveira

    2008-01-01

    Objective: Analyze research methodologies about the utilization of child restraint systems. Methods: In order to verify child restraint systems used in vehicles that transported children up to four years old to one day care center, during a single study day, four methods were applied: inspection without interview, inspection with interview, self-applied questionnaire and digital filming. These methods were analyzed regarding

  5. INFORMACIN SOBRE LOS NUEVOS RECORTES A EMPLEADAS Y EMPLEADOS PBLICOS. APLICACIN DEL REAL DECRETO LEY 20/2012

    E-print Network

    Oro, Daniel

    subida de impuestos indirectos provocan la reducción de la actividad económica y más desempleo. n Los Las reducciones en las prestaciones por desempleo pretenden culpabilizar a las personas en paro de su

  6. Los jóvenes latinoamericanos en transición: Un análisis sobre el desempleo juvenil en América Latina y el Caribe

    Microsoft Academic Search

    Caroline S. Fawcett

    2002-01-01

    Este estudio intenta captar la dinámica del proceso en el cual los jóvenes pasan del desempleo a la escuela, al empleo no remunerado y al empleo no calificado de bajos salarios, y su repercusión en los factores determinantes y en las políticas de desempleo juvenil. Este análisis de política considera las relaciones económicas entre sectores: dónde están estrechamente vinculados los

  7. Boletn Sociedad Entomolgica Aragonesa, n 44 (2009) : 579580. NOTAS BREVES Nuevos datos sobre la presencia de Canariola emarginata

    E-print Network

    Herrera, Carlos M.

    2009-01-01

    : ALBACETE: T. M. Vianos, WH 45/71, Cortijo de Escondite (Bergerie), 900 m, 6.viii.2008, vareo de Crataegus), 1250 m, 18.viii.2008, vareo de Crataegus, 2, 1, 1 juvenil. GRANADA: T. M. Huescar, WH 35/02, Cortijo de la Losa. 1450 m, 17.viii.2008, vareo Crataegus 1; T. M. Huescar, WH 39/03, Cortijo de Mirabetes

  8. El Conocimiento Ocupacional y del Yo para los Grupos Especiales. Monografias sobre el Conocimiento Ocupacional y del Yo.

    ERIC Educational Resources Information Center

    Hoyt, Kenneth B.

    This Spanish translation of ED 132 428 includes the three papers representing Office of Education attempts to face the need for improving delivery of career education to special portions of the population. New additions are brief sections on basic definitions and additional considerations of the significance of work. The first paper, on career…

  9. Mobile Library Guidelines. IFLA Professional Report No. 28 [and] Lineamientos sobre Bibliotecas Moviles. Informes Professionales de IFLA: 30.

    ERIC Educational Resources Information Center

    Pestell, Robert

    This publication provides the latest information available on the equipment and operation of mobile libraries operating out of road vehicles. The guide provides details on the establishment of mobile library services, financing, vehicles, furniture and equipment, staffing, collections, service base, and publicity. Some generalizations with regard…

  10. Memorias del Cuarto Simposio Internacional Sobre Polticas, Planificacin y Economa de los Incendios Forestales: Cambio Climtico e Incendios Forestales

    E-print Network

    Standiford, Richard B.

    Montes. Head of Forest Fire Research SEILAF. 5 Ingeniero de Montes. Head of Forest Fire Training SEILAF comparte el mismo objetivo común, a saber, la extinción del incendio al menor coste económico minimizando

  11. Inventário de macroliquens epífi tos sobre árvores utilizadas na arborização urbana em Curitiba, Paraná, Brasil: Subsídio para biomonitoramento urbano

    Microsoft Academic Search

    Sionara Eliasaro; Patrícia Wolf Veiga; Cristine Gobel Donha; Lucas Nogueira

    2009-01-01

    Inventory of epiphytic macrolichens on trees used in urban arborization in Curitiba, Paraná, Brazil. The fl oristic composition of epiphytic macrolichens on the following tree species used in urban arborization in Curitiba was analysed: Acer negundo , Lagerstroemia indica , Ligustrum lucidum , Parapiptadenia rigida , Cassia leptophylla , Syagrus romanzofÞ ana , Tabebuia alba , Tabebuia chrysotricha , Tabebuia

  12. PEIRCE E A CIÊNCIA DA INFORMAÇÃO: considerações preliminares sobre as relações entre a obra peirceana e a organização da informação

    Microsoft Academic Search

    Carlos Cândido de Almeida; José Augusto Chaves Guimarães

    The interdisciplinary relationships of the information science with Charles Sanders Peirces work (1839-1914) are still little explored. The contributions of the theory of signs in the information science, specifi- cally in the processes, instruments and products of the information organization, they fall back upon the expla- nations of the structuralist semiology and linguistics. The research is a theoretical study that

  13. Detalles sobre la publicacin, incluyendo instrucciones para autores e informacin para los usuarios en: http://espacialidades.cua.uam.mx

    E-print Network

    Paris-Sud XI, Université de

    usuarios en: http://espacialidades.cua.uam.mx Ruth Pérez López El sistema de bicicletas públicas "Ecobicis este artículo: http://espacialidades.cua.uam.mx © Ruth Pérez López (2013). Publicado en espacialidades Morales Arroyo, Manz. 1, Edif. 9, Depto. 502, Hogares de Ati- zapán, Atizapán de Zaragoza, Estado de

  14. Estado Actual del Conocimiento Sobre las Propiedades Biocidas de la Gobernadora (Larrea tridentata (D.C.) Coville)

    Microsoft Academic Search

    Química Aplicada

    2003-01-01

    Creosote bush (Larrea tridentata) is a perennial shrub from the Chihuahuan, Sonoran and Mohave deserts of North America. The leaves contain a thick resin, which behaves as a barrier that diminishes transpiration. Resin secondary metabolites like phenols, lignans and flavonoids, appear to be biochemical defenses that repel the aggression of herbivores, fungi, and other microorganisms, since there are not known

  15. Recubrimientos de TiAlN sobre acero ASTM A36 por el proceso de sputtering reactivo RF

    Microsoft Academic Search

    Franz Quesada; Álvaro Mariño

    TiAlN films were deposited on ASTM A36 steel by RF reactive sputtering process using a TiAl (60\\/40%) target. Films were sputtered at two different relative pres- sures, 0,05 and 0,1, keeping constant the Argon pressure. The films were deposi- ted on samples with different pretreatments: as received material, hardened and quenched, plasma-nitrided, and with initial coatings of Ti and TiN.

  16. Caderneta de Saúde da Criança: avaliação do preenchimento dos dados sobre gravidez, parto e recém-nascido

    Microsoft Academic Search

    Lúcia Maria H. F. Goulart; Claudia Regina; L. Alves; Zeína Soares Moulin

    Objective: Evaluate pregnancy, birth and neonatal data filling of the Child's Health Record (CHR) and study mother's perception about the function of this tool in Belo Horizonte, Minas Gerais, Brazil. Methods: This was a cross-sectional descriptive study of 797 CHR of infants born between April and December 2005 and delivered to their mothers soon after birth. A written protocol was

  17. Etnografía acelerada para transformar normas sociales sobre género y sexualidad en hombres puertorriqueños heterosexuales1,2

    PubMed Central

    Ortiz-Torres, Blanca; Rivera-Ortiz, Rafael J.; Mendoza, Sigrid

    2014-01-01

    Resumen La construcción de roles de género dominantes contribuyen al riesgo de contraer VIH, y por tal razón se ha urgido a que se integren las normas sociales relativas al género en las intervenciones preventivas del VIH. Este estudio pretende adaptar y desarrollar una intervención que facilite la transformación de normas sociales del género y de prácticas sexuales en hombres puertorriqueños. La intervención propone transformar normas sociales relacionadas al género y sexualidad en barras comunitarias utilizando el modelo de líderes de opinión. Luego de ser elegidos/as, los/as líderes de opinión diseminan mensajes integrando la importancia de relaciones equitativas entre parejas para la prevención del VIH. La primera fase de esta intervención es discutida en este artículo, la cual incluye un proceso de etnografía acelerada para identificar los escenarios comunitarios en los que podemos desarrollar esta intervención y permitirnos entender la cultura de las barras comunitarias. A partir de las observaciones etnográficas, pudimos: desarrollar un protocolo de seguridad para realizar las observaciones, desarrollar un perfil de la cultura de las barras, elegir las barras a participar en las dos condiciones del estudio y adaptar los instrumentos de la intervención para que respondieran a la particularidad de los/as participantes. PMID:25530828

  18. DESALINEACIN ELECTORAL Y NUEVOS ESCENARIOS POLTICOS. UN ESTUDIO COMPARADO SOBRE LOS CASOS DE COLOMBIA, COSTA RICA Y URUGUAY

    E-print Network

    Paris-Sud XI, Université de

    COLOMBIA, COSTA RICA Y URUGUAY Enrico GIACOMETTI SARTHOU Universidad de Salamanca giacometti estudiar estos procesos de cambio, los casos escogidos serán Costa Rica, Colombia y Uruguay. Palabras Clave

  19. Posibilidades y limitaciones de las políticas fiscales como instrumentos de salud: los impuestos sobre consumos nocivos. Informe SESPAS 2010

    Microsoft Academic Search

    Ángel López Nicolás; Arántzazu Viudes de Velasco

    This article discusses the possibilities of indirect taxation as a mechanism that alters the relative prices of goods and services and hence encourages citizens to adopt healthy lifestyles. We review the case of smoking and unhealthy diet. These two cases were chosen because these are the two lifestyle factors with the greatest impact on morbidity and mortality in Spain and

  20. Todos los clientes no son iguales: una perspectiva financiera sobre servicio al cliente para los gerentes de mercadeo

    Microsoft Academic Search

    Harold Lee Koch

    1999-01-01

    Los gerentes colombianos estamos pensando en Servicio al Cliente como la próxima ventaja competitiva y una ayuda para contrarrestar los efectos de la recesión actual. Estamos cansados de buscar siempre en nuestra caja de herramientas de mercadeo y encontrar solamente el martillo del precio. Para diferenciamos de la competencia, hacerle al cliente menos sensible una diferencia en precio y encontrar

  1. Apontamento sobre a contabilidade em Portugal entre 1900 e 1950. (Note on the accounting in Portugal between 1900 and 1950)

    Microsoft Academic Search

    Hernâni O. Carqueja

    2011-01-01

    Este ensayo intenta encontrar respuestas a la pregunta: ¿qué doctrinas fueron acogidas por los académicos portugueses y cómo evolucionó la contabilidad en Portugal, en el período 1900 a 1950? Para esclarecer el contexto en 1900 se procede a una breve revisión de los antecedentes desde la creación del “Aula do Comércio de Lisboa”, que es el referente de la enseñanza

  2. Memorias del Cuarto Simposio Internacional Sobre Polticas, Planificacin y Economa de los Incendios Forestales: Cambio Climtico e Incendios Forestales

    E-print Network

    Standiford, Richard B.

    Palabras clave: toma de decisiones, FARSITE, simulación de propagación del fuego, tratamientos de a menudo difícil, si no imposible. Así, muchas decisiones costosas de planificación de incendios se basan

  3. Oficina Nacional de Control Interno -ONCI Dcimo Informe de Evaluacin Sobre la Marcha de UN-SIMEGE

    E-print Network

    Prieto, Germán A.

    .001.001.002 Versión: 0.0 Página 2 de 20 PROCESO: Evaluación CÓDIGO: 001 SUBPROCESO: Evaluación DECIMO INFORME DE Calidad ­ SGC, Modelo Estándar de Control Interno ­ MECI y el Sistema de Desarrollo Administrativo

  4. Evaluación del sistema de información de Navarra sobre diagnósticos de infección por el VIH, 1985-2003

    Microsoft Academic Search

    Ana María Caro-Murillo; Concepción Moreno-Iribas; Fátima Irisarri; Pablo Aldaz; Víctor Napal; Carmen Varela Santos; Jesús Castilla

    2007-01-01

    Evaluation of the surveillance system for Human Immunodeficiency Virus Infections of Navarra, Spain, 1985-2003 Background: Navarra has an information system of HIV diagnoses working since the beginning of the epidemic up to the present day. This study aims at describing and evaluating this system, focusing on its sensitivity.

  5. Algunas consideraciones sobre comorbilidad del TADH: aspectos clínicos y epidemiológicos Some considerations on comorbidity of ADHD: clinical and epidemiological features

    Microsoft Academic Search

    Jorge Holguín Acosta; William Cornejo Ochoa

    summARY Attention deficit hyperactivity disorder is the most common neurocomportamental disorder in our country, with prevalence around 15 per cent; its repercussion on academic performance and discipline demands an early and adequate diagnosis and treatment. Clinicians must know the diagnostic criteria of other coexisting disorders that modify the prognosis and require additional therapeutic measures. Bipolar affective disorder may exhibit symptoms

  6. ENSAYO SOBRE LA OSCILACI ´ ON DEL MEDITERR ´ ANEO OCCIDENTAL Y SU INFLUENCIA EN LA PLUVIOMETRIA DEL ESTE DE ESPA ˜ NA

    Microsoft Academic Search

    Javier MARTIN VIDE

    An index of the Western Mediterranean Oscillation (WeMO) as the difference of the standarized pressures between Cadiz-San Fernando and Padua is defined. This low frequency variability pat- tern shows negative correlation with the winter precipitation (January) at Murcia, Alicante and Valencia, better than with the NAO.

  7. Artculo publicado en "Geogaceta", 32: 191-194. 2002 Sobre la contaminacin microbiolgica del acufero de la

    E-print Network

    Castillo, Antonio

    asientan en el área metropolitana de Granada capital. El abastecimiento de este área urbana se realiza perforaron numerosos sondeos de emergencia de los que se llegó a abastecer Granada capital; en la actualidad para el regadío (Castillo, 1993), y sólo aceptable para el consumo humano (Castillo, 1986b); en este

  8. Departamento de Fisica y Matematicas Matematicas -Grado en Biologia Hoja de problemas sobre funciones de varias variables

    E-print Network

    - y2 c) z = f(x, y) = 6 - 3x - y d) z = f(x, y) = 4 + x - y2 (a) Dibujar la intersecci´on de su gr´afica con los planos coordenados. (b) Dibujar alguna de sus curvas de nivel. (c) Dibujar aproximadamente su gr´afica. 4. Dibujar deforma aproximada la gr´afica de las siguientes funciones: a) z = 1 + x2 + y2 b

  9. El seminario consta de dos partes: Una primera parte (terica) sobre la Optimizacin delTDA-H desde una

    E-print Network

    Escolano, Francisco

    : · AnalizarlarealidaddelossujetosconTDAH,desdesuprimera infancia hasta la entrada en la edad adultaTDAH. · Promovercompetenciasenelalumnadoquelespermitadesarrollar las aptitudes de los menores conTDAH,para desenvolverse mejor por las diferentes trayectorias

  10. Cambios en el ingreso del hogar y sus efectos sobre la escolaridad de menores (Argentina, 1995-2003)

    Microsoft Academic Search

    Jorge A. Paz

    2008-01-01

    En este artículo se examinan los determinantes del uso del tiempo de los menores con especial referencia a los que tienen que ver con choques (idiosincrásicos o globales) adversos al bienestar de los hogares. Muchos de los hogares que ven resentidos sus ingresos por algún motivo apelan a la fuerza de trabajo de los cónyuges con el objetivo de lograr

  11. EFECTO DE LA LECTURA DE MATERIAL DE AUTOAYUDA SOBRE ALGUNAS VARIABLES PSICOLÓGICAS EN UNA MUESTRA NO CLÍNICA

    Microsoft Academic Search

    PATRICIA MARTÍNEZ SERRANO; ASOCIACIÓN ESPAÑOLA DE PSICOLOGÍA; JUAN CARLOS SIERRA

    2005-01-01

    Over the last decades there has been an important increase in the use of self-help literature. The present research evaluates the effect of self-help books on anxiety, fear of negative evaluation, dysfunctional attitudes and assertive behaviour. These variables were assessed in a 20 healthy volunteers before and after reading the self-help book (experimental group) and in a 20 healthy volunteers

  12. Efecto de la acetilación y oxidación sobre algunas propiedades del almidón de semillas de Fruto de pan (Artocarpus altilis)

    Microsoft Academic Search

    Alicia Mariela Rincón; Lizet Bou Rached; Luis E. Aragoza; Fanny Padilla

    SUMMARY. Effect of acetylation and oxidation on some properties of Breadfruit (Artocarpus altilis) seed starch. Starch extracted from seeds of Artocarpus altilis (Breadfruit) was chemi- cally modified by acetylation and oxidation, and its functional prop- erties were evaluated and compared with these of native starch. Analy- sis of the chemical composition showed that moisture content was higher for modified starches.

  13. Carlos Menem y Fernando Collor de Mello ¿Arquitectos del Mercosur? Algunas reflexiones sobre calidad democrática e integración regional

    Microsoft Academic Search

    SANTIAGO C. LEIRAS

    El 21 de Marzo de 1991, los presidentes y ministros de relaciones exteriores de la Argentina, Brasil, Paraguay y Uruguay suscribieron el Tratado de Asunción para la constitución de un mercado común entre sus países, complementando luego el marco institucional para la conformación del MERCOSUR con la firma del Protocolo de Brasilia, en el mes de Diciembre del año 1991,

  14. Impacto de la luz artificial sobre la anidación de la tortuga marina Dermochelys coriacea (Testudines: Dermochelyidae), en playa Cipara, Venezuela

    Microsoft Academic Search

    María Rondón Médicci; Joaquín Buitrago; Michael Mccoy

    Impact of artificial light on nesting in the leatherback turtle Dermochelys coriacea (Testudines: Dermochelyidae) at Cipara beach, Venezuela. The number of Leatherback turtle nests and their spatial dis- tribution was compared between years with and without artificial light, and between dark and lighted beach segments, in Cipara Beach, Paria Peninsula, Venezuela. Residents were interviewed to identify their perceptions about the

  15. 1. 1. JUSTIFICACIN Y PLANTEAMIENTO q Los presupuestos tericos sobre los que se asienta el mtodo de trabajo de las

    E-print Network

    Escolano, Francisco

    LA COMISIÓN DE CALIDAD DE TURISMO 1. Decano o persona en quien delegue 2. Vicedecano coordinador de de mejora para las prácticas preprofesionales. o 6ª sesión: 18 de junio: punto 3. 1. 5. Definición de

  16. Consenso SER sobre la gestión de riesgo del tratamiento con terapias biológicas en pacientes con enfermedades reumáticas

    Microsoft Academic Search

    Juan Gómez Reino; Estíbaliz Loza; José Luis Andreu; Alejandro Balsa; Enrique Batlle; Juan D. Cañete; Eduardo Collantes Estévez; Cristina Fernández Carballido; José Luis Fernández Sueiro; Rosario García de Vicuña; Isidoro González-Álvaro; Carlos González Fernández; Xavier Juanola; Luis Francisco Linares; José Luis Marenco; Emilio Martín Mola; Manuel Moreno Ramos; Juan Mulero Mendoza; Santiago Muñoz Fernández; Rubén Queiro; Patricia Richi Alberti; Jesús Sanz; Jesús Tornero Molina; Pedro Zarco Montejo; Loreto Carmona

    2011-01-01

    ObjectiveDue to the increasing use of biologic therapy in rheumatic diseases and the importance of its risk management, the Spanish Society of Rheumatology (SER) has promoted the development of recommendations based on the best evidence available. These recommendations should be a reference to rheumatologists and those involved in the treatment of patients who are using, or about to use biologic

  17. Revista de Derecho Administrativo Econmico N 14, pgs. 35 -51 [2005] Rudnick, Hugh -Mocrquer, Sebastin -Cerda, Sebastin Propuesta sobre sanciones

    E-print Network

    Dixon, Juan

    Ingeniería, Universidad Católica de Chile. 2 Ingeniero Civil, Gerente de Estudios, Systep Ingeniería y la existencia de organismos encargados de la operación del sistema. Si bien, el interés del estudio las empresas distribuidoras, en algunos casos, puedan actuar contra

  18. Producción masiva automatizada de la broca del café, Hypothenemus hampei (Coleoptera: Scolytidae) sobre la dieta artificial Cenibroca modificada.

    Technology Transfer Automated Retrieval System (TEKTRAN)

    An automated system for the mass rearing of coffee berry borer, CBB, Hypothenemus hampei (Ferrari) was developed at the National Biological Control Laboratory, USDA-ARS in the United States. A novel cell design of 32 cell trays (30 x 14.6 x 1.1 cm) and an automated diet dispenser were developed and ...

  19. O IMPACTO DA POLÍTICA FISCAL LOCAL SOBRE O CRESCIMENTO ECONÔMICO: UM ESTUDO EM CROSS-SECTION PARA OS MUNICÍPIOS POTIGUARES

    Microsoft Academic Search

    Francisco Soares de Lima

    Resumo: Este trabalho tem como objetivo estudar os efeitos da política fiscal local no crescimento econômico dos municípios do Rio Grande do Norte. A pesquisa é fundamentada teoricamente com base no modelo de Crescimento Endógeno e na Nova Geografia Econômica (NGE). Foi utilizado um modelo econométrico baseado no proposto por Oliveira (2006), que visa estimar o efeito da política fiscal

  20. Observaciones sobre el debate Sahlins-Obeyesekere: la muerte del capitán Cook vista desde la antropología de René Girard

    Microsoft Academic Search

    Gabriel Andrade

    2004-01-01

    The goal of this article is to take sides in the dispute between the anthropologists Marshall Sahlins and Gananath Obeyesekere, using René Girard's work as a theoretic instrument. Sahlins argues that Captain James Cook was murdered in Hawaii in 1779, and according to posterior testimonies, the natives identified Cook with Lono, a local god of agriculture. Obeyesekere holds that Sahlins'

  1. LA COMPARABILIDAD DE LA INFORMACIÓN CONTABLE EN EUROPA: EFECTOS DE LA MANIPULACIÓN CONTABLE SOBRE EL NIVEL DE CONSERVADURISMO

    Microsoft Academic Search

    Araceli Mora; Ana Gisbert; Beatriz García Osma; Juan M. García Lara

    2004-01-01

    This paper aims to study international differences in accounting conservatism, excluding the effect ofearnings management practices across three European countries (France, Germany and United Kingdom).These countries not only belong to different accounting regulatory regimes but also present significantinstitutional differences determinant on both the magnitude and sign of earnings management practices.Particularly, continental European countries included in our sample have institutional features

  2. Neurociência computacional: um instrumento na pesquisa clínica sobre o cérebro Computational Neurosciences: a tool for clinical research about the brain

    Microsoft Academic Search

    Marcelo Bastos Mazza

    This review discusses fundamental concepts in computational neuroscience and it presents applications of the computational model construction in clinical problems in neurology and neuropsychology. The text presents basic processes involved in the elaboration of computational models in neurosciences and it exhibits recent works in epilepsy and cognition showing the importance of the use of computational methods to study clinical problems

  3. Percepção dos produtores de leite do município de Passos, MG, sobre o carrapato Boophilus microplus (Acari: Ixodidae), 2001

    Microsoft Academic Search

    Christiane Maria Barcellos Magalhãe Rocha; Paulo Roberto de Oliveira; Romário Cerqueira Leite; Denis Lúcio Cardoso; Simone Berger Calic; John Furlong

    2006-01-01

    Twenty five dairy farms were randomly chosen from all farms producing more than 500 liters of milk\\/ day in Passos, MG, Brazil. The owners were interviewed to characterize their perceptions about the biology of B. microplus and their attitudes towards tick control. Most of the producers have a college degree and more than six year-experience in the activity. The biological

  4. La història en l’estratègia política dels dirigents catalans per enderrocar Olivares. Encara sobre la Proclamación católica

    Microsoft Academic Search

    Antoni Simón Tarrés

    2007-01-01

    Este artículo traza la estrategia seguida por los dirigentes revolucionarios catalanes de 1640 con objeto de derrocar al Conde Duque de Olivares y evitar la invasión militar de Cataluña. Se analizan los argumentos históricos que, a través de la Procalamción católica de fray Gaspar Sala, los consellers de Barcelona presentaron a Felipe IV para demostrar que una “rectificación” de la

  5. A história de Pierina e as interpretações sobre processos de sofrimento, perturbação e loucura (RS\\/Brasil, século XX)1

    Microsoft Academic Search

    Yonissa Marmitt Wadi

    This article is based on the reconstitution of the peasant Pierina's history of life, who drowned her small daughter, accused in a process-crime and later interned in a psychiatric hospital for ascertainment of its \\

  6. Efeito da Monensina e Lasalocida sobre a Atividade de Fermentação de Aminoácidos in Vitro pelos Microrganismos Ruminais

    Microsoft Academic Search

    Rogério de Paula Lana; Juliana Silva de Oliveira; Arnaldo Chaer Borges; Rafael Gonçalves Veloso; Poliana Mary Magalhães Nunes

    2002-01-01

    The objective of this experiment was to study the in vitro effects of the ionophores on ruminal fermentation of amino acids. Rumen fluid of a steer fed an elephant-grass based diet was used in the incubations, with addition of casein hydrolysate, in three treatments (control-C; monensin-M; and lasalocid-L). Inocula were transferred into new tubes, daily and on the 11th day

  7. Efecto de la alimentación con sangre humana sobre la fecundidad, fertilidad y ciclo biológico de Rhodnius prolixus (Hemiptera: Reduviidae)

    Microsoft Academic Search

    E. Aldana; E. Lizano; A. Valderrama

    The effect of several human blood fractions artificially fed to Rhodnius prolixusStal 1859 on ovipos- ture (fecundity), egg-hatching (fertility) and life cycle was observed. Specimens fed on mans blood were more fecund than those fed with womans blood. There were no significant differences in fertility related to host sex. The nymphal development time and number of feedings to molt to

  8. Efecto de la contaminación ambiental sobre las consultas por infecciones respiratorias en niños de la Ciudad de México

    Microsoft Academic Search

    MARTHA MARÍA TÉLLES-ROJO; ISABELLE ROMIEU; MARCO POLO-PEÑA; SILVIA RUIZ-VELASCO; FERNANDO MENESES-GONZÁLEZ; MAURICIO HERNÁNDEZ-AVILA

    1997-01-01

    Objective. To model the variability of medical visits by chil- dren for respiratory reasons as a consequence of the daily changes in environmental pollution observed in the emer- gency and family medicine departments of a hospital of the Instituto Mexicano del Seguro Social located in the south- west of Mexico City during 1993. Materials and meth- ods. The correlation between

  9. Sobre rex y regnum. Problemas de terminología política durante el primer siglo de historia de los visigodos

    Microsoft Academic Search

    Ana María Jiménez Garnica

    2004-01-01

    En este trabajo se revisa el significado que pudieron tener los términos rex y regnum en la pars accidentis durante el s. v, cuando las fuentes romanas los emplearon para calificar a ciertos jefes militares no necesariamente germanos. En el caso de los godos establecidos en la Galia, parece que puede desterrarse la idea de que quisieran crear un Estado

  10. Ação antrópica e resultantes sobre a estrutura e composição da Mata Atlântica na Ilha Grande, RJ 1

    Microsoft Academic Search

    Rogério Ribeiro de Oliveira

    The Atlantic Rain Forest at Ilha Grande is constituted by a mosaic of different aged forests. I examined a successional gradient of 5-yr, 25-yr and 50-yr-old slope forests, growing in areas once used for subsistence agriculture by the caiçara people in what is today the Praia do Sul State Biological Reserve on Ilha Grande, Rio de Janeiro state. These areas

  11. El justiprecio expropiatorio en los Países Bajos

    Microsoft Academic Search

    Demetrio Muñoz Gielen

    1970-01-01

    La plusvalía urbanística en los Países Bajos pertenece al propietario del suelo. La legislación\\u000aexpropiatoria es coherente con este principio al reconocer al propietario el derecho a un\\u000ajustiprecio que incluye la revalorización del suelo originada por su futuro uso. Desde finales de\\u000alos 80, cuando la Administración Pública dejó de practicar masivamente políticas activas de\\u000asuelo y vivienda social,

  12. Thallium contamination of soils as affected by sphalerite weathering: A model rhizospheric experiment

    NASA Astrophysics Data System (ADS)

    Van?k, Aleš; Grösslová, Zuzana; Mihaljevi?, Martin

    2015-04-01

    The environmental stability of Tl-rich sphalerite in two contrasting soils was studied. Rhizospheric conditions were simulated to assess the risk associated with sulfide microparticles entering agricultural (top)soils. The data presented here clearly demonstrate a significant effect of 500 ?M citric acid, a model rhizospheric solution, on ZnS alteration followed by enhanced Tl and Zn release. The relative ZnS mass loss after 28 days of citrate incubation reached 0.05 and 0.03 wt.% in Cambisol and Leptosol samples respectively, and was up to 4 times higher, compared to H2O treatments. Incongruent (i.e., substantially increased) mobilization of Tl from ZnS was observed during the incubation time. Generally higher (long-term) stability of ZnS with lower Tl release is predicted for soils enriched in carbonates. Furthermore, the important role of illite in the stabilization of mobilized Tl, linked with structural (inter)layer Tl-K exchange, is suggested. Thallium was highly bioavailable, as indicated by its uptake by white mustard; maximum Tl amounts were detected in biomass grown on the acidic Cambisol. Despite the fact that sulfides are thought as relatively stable phases in soil environments, enhanced sulfide dissolution and Tl/trace metal release (and bioaccumulation) can be assumed in rhizosphere systems.

  13. Soil wetting patterns of vegetation and inter-patches following single and repeated wildfires

    NASA Astrophysics Data System (ADS)

    González, Óscar; Malvar, Maruxa; van den Elsen, Erik; Hosseini, mohammadreza; Coelho, Celeste; Ritsema, Coen; Bautista, Susana; Keizer, Jan Jacob; Cerdà, Artemi

    2015-04-01

    Although wildfires spread in Mediterranean areas are considered a natural processes, the expected increase in fire frequency has raised concerns about the systems' future resilience (Pausas, 2004). Besides more frequent, future wildfires can become more severe and produce more pronounced changes in topsoil properties, vegetation and litter (Cerdá and Mataix-Solera, 2009). To deal with challenges, the EU funded CASCADE and RECARE projects, which are currently assessing soil threats and tipping-points for land degradation in a climatic gradient across Europe. The present research was developed in Portugal and aims to find relationships between fire frequency and soil wetting patterns following single versus repeated wildfires. In September 2012, a wildfire burnt 3000 ha. of Pine stands and shrub vegetation in the vicinity of Viseu district, North-Central Portugal. Analyses according to the available burnt-area maps (1975-2012), discriminated areas that has been burned 1x (called SD) and 4x (called D) times. In order to evaluate the post-fire soil surface moisture patterns, 6 slopes (3 in SD and 3 in D) were selected and a balanced experimental design with 72 soil moisture sensors (EC5 and GS3, from Decagon devices) was implemented under shrubs (n=18) and on bare (n=18) soil environments, at 2.5 cm and 7.5 cm soil depth each. The spatio-temporal occurrence of soil water repellence (SWR) (Keizer et al., 2008; Prats et al., 2013; Santos et al., 2014) was monthly assessed through the MED test at 2.5 cm and 7.5 cm soil depth into 5 sampling points located at regular distances along a transect running from the top to bottom of a selected slope in SD and D. Automatic and totalize rainfall gauges were also installed across the study area. Preliminary results showed that soil wetting patterns and SWR occurrence differs between SD, D sites and, between soil environment (under shrubs and on bare soil areas). SWR were more pronounced on the SD than in D, affecting soil wetting cycles. Soil moisture content and antecedent rainfall were both correlated with SWR, although insufficient to predict the temporal variations. Antecedent and maximum soil moisture were close related with the SWR status and data analyses showed a top-down breaking mechanism on the SWR Acknowledgements. The research projects CASCADE FP7 (ENV.2011.2.1.4, www.cascade-project.eu) AND RECARE FP7 (n° 603498, http://recare-project.eu/) supported this research. References. Cerdá, A., Mataix-Solera, J., 2009. Incendios forestales en España. Ecosistemas terrestres y suelos. En: Efectos de los incendios forestales sobre los suelos en España. Cerda and Mataix-Solera (eds). Universidad de Valencia, Valencia (España). 529 pp. Keizer, J.J., Doerr, S.H., Malvar, M.C., Prats, S.A., Ferreira, R.S.V., Oñate, M.G., Coelho, C.O.A., Ferreira, A.J.D., 2008. Temporal variation in topsoil water repellency in two recently burnt eucalypt stands in north-central Portugal. Catena 74 (3), 192-204. Pausas, J., 2004. Changes in fire and climate in the eastern Iberian Peninsula (Mediterranean basin). Climatic Change, 63: 330-340. Prats, S.A., Malvar, M., Vieira, D.C.S., McDonald, L., Keizer, J.J. 2013. Effectiveness of hydromulching to reduce runoff and erosion in a recently burnt pine plantation in central Portugal. Land Degradation and Development. DOI: 10.1002/ldr.2236. Santos J.M., Verheijen F.G.A., Wahren F.T., Wahren A., Feger K.H., Bernard-Jannin L., Rial Rivas M.E., Keizer J.J., Nunes J.P. 2014. Soil Water Repellency dynamics in Pine and Eucalypt plantations in Portugal - A high resolution time series. Land Degradation & Development. DOI: 10.1002/ldr.2251.

  14. Hydrogeology in North America: past and future

    NASA Astrophysics Data System (ADS)

    Narasimhan, T. N.

    2005-03-01

    This paper is a retrospective on the evolution of hydrogeology in North America over the past two centuries, and a brief speculation of its future. The history of hydrogeology is marked by developments in many different fields such as groundwater hydrology, soil mechanics, soil science, economic geology, petroleum engineering, structural geology, geochemistry, geophysics, marine geology, and more recently, ecology. The field has been enriched by the contributions of distinguished researchers from all these fields. At present, hydrogeology is in transition from a state of discovering new resources and exploiting them efficiently for maximum benefit, to one of judicious management of finite, interconnected resources that are vital for the sustenance of humans and other living things. The future of hydrogeology is likely to be dictated by the subtle balance with which the hydrological, erosional, and nutritional cycles function, and the decision of a technological society to either adapt to the constraints imposed by the balance, or to continue to exploit hydrogeological systems for maximum benefit. Although there is now a trend towards ecological and environmental awareness, human attitudes could change should large parts of the populated world be subjected to the stresses of droughts that last for many decades. Cet article est une rétrospective de l'évolution de l'hydrogéologie en Amérique du Nord sur les deux derniers siècles, et une brève évaluation de son futur. L'histoire de l'hydrogéologie est marquée par le développement de plusieurs techniques de terrain telles, l'hydrologie des eaux souterraines, la mécanique des sols, les sciences du sol, la géologie économique, l' ingénierie pétrolière, la géologie structurale, la géochimie, la géophysique, la géologie marine et plus récemment l'écologie. La science a été enrichie par la contribution de plusieurs chercheurs distingués, provenant de toutes ces branches. A présent, l'hydrogéologie est à la transition entre la volonté de découvrir de nouvelles ressources et l' exploitation la plus bénéfique au possible, et un management judicieux des ressources finies, interconnectées, qui sont vitales pour l' approvisionnement des hommes et autres formes de vie. Le futur de l' hydrogéologie sera dicté par la balance subtile dans laquelle intervient les cycles de l'hydrologie, de l'érosion, de la nutrition, et la décision d'une société technologique qui s'adapterait aux contraintes de la balance, ou qui continuerait d'exploiter les systèmes hydrologiques pour un bénéfice maximum. Par ailleurs il y a une nette tendance à inclure les aspects écologiques, les aspects environnementaux, et les changements humains qui pourraient être influencés par les modifications hydrogéologiques observées depuis une dizaine d'années. Este articulo es una retrospectiva sobre la evolución de la hidrogeología en Norte América en los pasados dos siglos, y una breve especulación de su futuro. La historia de la hidrogeología está marcada por desarrollos en muchos campos diferentes tal como hidrología de aguas subterráneas, mecánica de suelos, ciencia del suelo, geología económica, ingeniería del petróleo, geología estructural, geoquímica, geofísica, geología marina, y más recientemente, ecología. El campo se ha enriquecido por las contribuciones de investigadores distinguidos en todos esos campos. Actualmente, la hidrogeología se encuentra en transición de un estado de descubrir nuevos recursos y explotarlos eficientemente para un beneficio máximo, a un estado de gestión juiciosa de recursos finitos, interconectados, que son vitales para el sustento de humanos y otras cosas vivientes. El futuro de la hidrogeología posiblemente esté determinado por el balance sutil con el cual funcionan los ciclos nutricionales, erosionales e hidrológicos, y la decisión de una sociedad tecnológica para ya sea adaptarse a las restricciones impuestas por el balance o para continuar con la explotación de los sistemas hidrogeológicos para un benefici

  15. Impacts of afforestation on groundwater resources and quality

    NASA Astrophysics Data System (ADS)

    Allen, Alistair; Chapman, Deborah

    2001-07-01

    Plans to double the proportion of land under forest cover in Ireland by the year 2035 have been initiated. The plan, primarily financially driven, ignores potential environmental impacts of forestry, particularly impacts on groundwater resources and quality. Since groundwater supplies almost 25% of Ireland's total potable water, these impacts are important. Field investigations indicate that afforestation leads to a reduction in runoff by as much as 20%, mainly due to interception of rainfall by forest canopies. Clearfelling has the opposite impact. Implications are that uncoordinated forestry practices can potentially exacerbate flooding. Groundwater recharge is affected by forestry, largely due to greater uptake of soil water by trees and to increased water-holding capacity of forest soils, arising from higher organic contents. Recharge rates under forests can be reduced to one tenth that under grass or heathland. Groundwater quality may be affected by enhanced acidification and nitrification under forests, due partly to scavenging of atmospheric pollutants by forest canopies, and partly to greater deposition of highly acid leaf litter. The slower recharge rates of groundwater under forests lead to significant delays in manifestation of deterioration in groundwater quality. Résumé. Des plans sont à l'étude pour doubler la proportion du couvert forestier en Irlande d'ici à 2035. Le plan, primitivement déterminé sur une base financière, ignore les impacts environnementaux potentiels de la foresterie, et particulièrement les impacts sur les ressources en eau souterraine et leur qualité. Du fait que les eaux souterraines satisfont presque 25% du total de l'eau potable de l'Irlande, ces impacts sont importants. Les études de terrain montrent que le reboisement conduit à une réduction du ruissellement d'au moins 20%, principalement à cause d'une interception de la pluie par le couvert forestier. Les coupes ont un impact contraire. Les implications sont que des pratiques forestières non coordonnées sont susceptibles d'exacerber les crues. La recharge des nappes est affectée par la foresterie, surtout à cause de prélèvements plus importants de l'eau du sol par les arbres et à cause de la capacité accrue des sols forestiers à retenir de l'eau, conduisant à de plus fortes teneurs en matières organiques. Les taux de recharge sous les forêts peuvent être réduits d'un dixième par rapport à la prairie ou à la lande. La qualité de l'eau souterraine peut être affectée par une acidification accrue et par une nitrification sous les forêts, provoquées pour une part par une fixation des polluants atmosphériques par le couvert forestier et pour une autre part par un dépôt plus important d'une litière plus fortement acide. Les taux de recharge plus lente des nappes sous les forêts conduisent à des retards importants dans la manifestation de la détérioration de la qualité de l'eau souterraine. Resumen. Se han iniciado los planes para duplicar la proporción de terrenos reforestados en Irlanda hacia el año 2035. El plan, impulsado por fines económicos, ignora los impactos potenciales medioambientales de la silvicultura, y, en particular, los impactos a los recursos de aguas subterráneas y a su calidad. Puesto que el 25 % del agua potable en Irlanda es suministrada por medio de aguas subterráneas, dichos impactos son importantes. Las investigaciones de campo indican que la reforestación lleva a una reducción de la escorrentía de hasta un 20 %, fundamentalmente por la interceptación de la lluvia en las copas de los árboles, mientras que la deforestación tiene el impacto opuesto. Las implicaciones son tales que las prácticas forestales descoordinadas pueden aumentar enormemente el riesgo de inundaciones. También la recarga a los acuíferos se ve afectada por la reforestación, debido, sobre todo, al uso del agua del suelo por los árboles y a la mayor capacidad de retención de los suelos en zonas boscosas, al disponer de más materia orgánica. Las tasas de recarga en zonas boscosas puede

  16. Biotransformation of pesticides in saturated-zone materials

    NASA Astrophysics Data System (ADS)

    Hoyle, Blythe L.; Arthur, Ellen L.

    Many studies have been conducted to evaluate pesticide contamination of groundwater in the United States, but investigations of pesticide biotransformation in saturated zones are much less numerous than in surface soils. Because results of studies using soils are not directly applicable to the subsurface, the purpose of this paper is to illustrate examples of pesticide biotransformation in saturated-zone materials. Although it must be considered with caution, the US Environmental Protection Agency's (EPA) "Pesticides in Ground Water Database" was used to focus the discussion on the biotransformation potential of dibromoethane (EDB), atrazine, acetanilide herbicides, and aldicarb, all of which have been detected in groundwater in the United States. Results of more than two dozen studies indicate that a biotransformation potential for these pesticides exists in saturated-zone materials, although for any given pesticide substantial differences in biotransformation occurred. These variations were due both to differences in experimental methods and to heterogeneities in the subsurface materials under investigation. However, because biotransformation mechanisms were not well investigated, it is generally not possible to extrapolate predictions of biotransformation potential beyond the specific sites investigated. These results highlight the need to better understand microbial genetic regulation of biotransformation processes so that genetic information may be effectively incorporated into future investigations of biotransformation potential in the subsurface. Résumé De nombreuses études ont été réalisées pour évaluer le degré de pollution des aquifères par les pesticides aux États-Unis, mais les recherches concernant la biotransformation des pesticides dans les eaux souterraines sont beaucoup moins nombreuses que dans les sols. Du fait que les résultats des études concernant les sols ne sont pas directement applicables au milieu souterrain, le propos de cet article est d'illustrer par des exemples la biotransformation des pesticides dans les nappes. Bien qu'il faille la considérer avec précaution, la base de données sur les pesticides dans les eaux souterraines de l'Agence américaine pour la protection de l'environnement a été utilisée pour centrer la discussion sur le potentiel de biotransformation du dibromoéthane (EDB), de l'atrazine, des désherbants acétanildés et de l'aldicarb, qui tous ont été détectés dans les nappes des États-Unis. Les résultats de plus de deux douzaines d'études indiquent qu'il existe un potentiel de biotransformation de ces pesticides dans les nappes, bien qu'entre chacun de ces pesticides il existe des différences très nettes dans la biotransformation. Ces variations sont en fait dues à la fois à des différences dans les méthodes expérimentales et dans les hétérogénéités dans les matériaux étudiés. Cependant, parce que les mécanismes de la biotransformation ne sont pas bien étudiés, il est en général impossible d'extrapoler les prédictions du potentiel de biotransformation à des sites d'étude spécifiques. Ces résultats soulignent la nécessité de mieux comprendre la régulation génétique microbienne des processus de biotransformation, pour que l'information génétique puisse être efficacement prise en compte dans les futures recherches sur le potentiel de biotransformation dans le sous-sol. Resumen Se han llevado a cabo un gran número de estudios para evaluar la contaminación por pesticidas en los acuíferos de los Estados Unidos de América. Sin embargo, las investigaciones sobre biotransformación de pesticidas en la zona saturada son mucho menos numerosas que en suelos. Como los resultados obtenidos en suelos no son directamente transladables a la zona saturada, el objetivo de este artículo es mostrar ejemplos de biotransformación de pesticidas en la zona saturada. Aunque debe tomarse con cautela, la base de datos "Pesticides in Ground Water Database (Base de Datos de Pesticidas en Aguas Subterráneas)" perteneci

  17. Soil type affects migration pattern of airborne Pb and Cd under a spruce-beech forest of the UN-ECE integrated monitoring site Zöbelboden, Austria.

    PubMed

    Kobler, Johannes; Fitz, Walter J; Dirnböck, Thomas; Mirtl, Michael

    2010-03-01

    Anthropogenic trace element emissions have declined. However, top soils all over the world remain enriched in trace elements. We investigated Pb and Cd migration in forest soils of a remote monitoring site in the Austrian limestone Alps between 1992 and 2004. Large spatial variability masked temporal changes in the mineral soil of Lithic Leptosols (Skeltic), whereas a significant reduction of Pb concentrations in their forest floors occurred. Reductions of concentrations in the less heterogeneous Cambisols (Chromic) were significant. In contrast, virtually no migration of Pb and Cd were found in Stagnosols due to their impeded drainage. Very low element concentrations (<1 microg l(-1)) in field-collected soil solutions using tension lysimeters (0.2 microm nylon filters) imply that migration largely occurred by preferential flow as particulate-bound species during intensive rainfall events. Our results indicate that the extent of Pb and Cd migration in soils is largely influenced by soil type. PMID:19879680

  18. Temporal variability of selected chemical and physical properties of topsoil of three soil types

    NASA Astrophysics Data System (ADS)

    Jirku, Veronika; Kodesova, Radka; Nikodem, Antonin; Muhlhanselova, Marcela; Zigova, Anna

    2013-04-01

    Temporal variability of soil properties measured in surface horizons of three soil types (Haplic Cambisol, Greyic Phaeozem, Haplic Luvisol) was studied in years 2007, 2008, 2009 and 2010. Undisturbed soil samples were taken every month to evaluate the actual field soil-water content, bulk density, porosity and hydraulic properties. The grab soil samples were taken every month to evaluate aggregate stability using the WSA (water stable aggregates) index, pHH2O and pHKCl, soil organic matter content and quality. Unsaturated hydraulic conductivity for pressure head of -2 cm was measured directly in the field using the minidisk tension infiltrometer. In addition soil structure was documented on micromorphological images. In some cases, the similar trends of the pHH2O , pHKCl , A400/A600, rod, P, ?field or WSA values were observed in different soils. Interestingly, the similar trends were found mostly for the Haplic Cambisol and the Greyic Phaeozem despite the fact that these soils considerably differed (different soil substrate, pedogenetic processes, etc.) and that variable crops (winter wheat and spring wheat) were planted at both locations during two years (2007 and 2006). Mostly different trends were observed for the Haplic Luvisol and the Greyic Phaeozem (soil of the same substrate). The reason could be attributed to a high vulnerability of the Haplic Luvisol to soil degradation in comparison to that of the Greyic Phaeozem. Parameters of hydraulic properties were highly variable and did not show similar trends for different soils (except the saturated soil water content and the slope of the retention curve at the inflection point for Haplic Cambisol and Greyic Phaeozem). Soil structure, aggregate stability and soil hydraulic properties were interrelated and depended on plant growth, rainfall compaction and tillage. The drier conditions in some soils positively influenced the soil aggregate stability, the slope of the retention curve at the inflection point and hydraulic conductivity. Probably due to the high variation of soil hydraulic properties no closer correlation between them and other properties was detected. Despite that the slope of the retention curve at the inflection point (which should indicate physical quality of the soil, e.g. soil aggregation and consequently soil porosity system) in many cases increased (decreased) when also the soil aggregate stability and hydraulic conductivity values increased (decreased), no closer correlation was revealed when analyzing for the entire 4 year period. The study showed different trends during different years. This was anticipated in the Greyic Phaeozem where different cops (spring wheat, winter wheat and winter barley) were planted during different years. Different trends were however observed also in the Haplic Cambisol and the Haplic Luvisol, where the same or similar crops (in both cases mostly winter wheat and ones winter barley) was sown. Results showed that climatic conditions (mostly during he winter end spring) played dominant role. Thus data, which were obtained during one year period, could not be used to generalize a soil regime in a particular soil and crop. Our results showed that it is impossible to apply any model, which would be based on statistical analyses, to predict soil properties development during one year or even longer period. Results indicate that findings cannot be used to generalize soil properties for other soil types, plants or climates. Acknowledgment: Authors acknowledge the financial support of the Czech Science Foundation (GA CR 526/08/0434) and the Ministry of Agriculture of the Czech Republic (QJ1230319).

  19. Spatial variability of soil quality in the surroundings of a saline lake environment

    NASA Astrophysics Data System (ADS)

    Pérez González, María Eugenia; García Rodríguez, María Del Pilar; González-Quiñones, Vanesa; Jiménez Ballesta, Raimundo

    2006-10-01

    The spatial variability of the quality of the soil on the shores of a lagoon affected by hydromorphy and/or salinity can be identified (Laguna de Villacañas, Castilla La Mancha) by the use of multitemporal Landsat images in order to analyse these changes. For this purpose, TM and ETM images along with field observations and certain edaphic laboratory parameters are used. In order to identify saline-hydromorphic soils, the spatial variability of chemical and physical properties of a transect, which includes from Solonchaks to Regosols and Cambisols, have been correlated with the Normalised Difference Vegetation Index (NDVI). This index, chosen for specific dates, has proven to be very useful in detecting halophytic vegetation and relating it to the variability of the quality of these soils.

  20. Delineation of colluvial soils in different soil regions

    NASA Astrophysics Data System (ADS)

    Zádorová, Tereza; Penížek, Vít; Vašát, Radim

    2015-04-01

    Colluvial soils are considered to be the direct result of accelerated soil erosion in agricultural landscape, resulting in accumulation of humus-rich soil material in terrain depressions and toe slopes. They represent an important soil cover element in landscapes influenced by soil erosion and form an important soil organic carbon (SOC) pool. Delineation of colluvial soils can identify areas with high sediment input and potential deep organic carbon storage and thus improve our knowledge on soil mass and SOC stock redistribution in dissected landscapes. Different prediction methods (ordinary kriging, multiple linear regression, supervised fuzzy classification, artificial neural network, support vector machines) for colluvial soils delineation have been tested in three different soil regions (Cambisol, Luvisol and Chernozem) at two scales (plot and watershed) in the Czech Republic. The approach is based on exploitation of relationship between soil and terrain units and assumes that colluvial soil can be defined by particular range of terrain attributes values. Terrain attributes derived from precise DEMs were used as predictors in applied models. The soil-terrain relationship was assessed using a large dataset of field investigations (300 cores at each plot and 100 cores at each watershed). Models were trained at plot scale (15-33 ha) and the best performing model was then calibrated and validated at watershed scale (25-55 km2). The study proved high potential of terrain variables as predictors in colluvial soil delineation. Support vector machines method was the best performing method for colluvial soil occurrence prediction at all the three sites. However, significant differences in performance have been identified among the studied plots. The best results were obtained in Luvisol region where both determination coefficient and prediction accuracy reached the highest values. The model performance was satisfactory also in Chernozem region. The model showed its limitations in the Cambisol region, where a high uncertainty and low prediction accuracy resulted from generally weak soil-terrain relationship given by low redistribution of the soil material. Different terrain attributes were applied as predictors in the models at each study region. In the Chernozem region, the colluvial area is defined by extreme values of slope and topographic position index. In Luvisol and Cambisol regions, colluvial soil area is related mostly to specific values of plan curvature and topographic wetness index. Role of colluvial soils given by theirs spatial extent differs in the studied sites. Colluvial soil in the Chernozem region represents an important soil cover part (13% from the total area). Moderate importance of colluvial soils was determined in the Luvisol region (8 %) and low in the Cambisol region (3%). Spatial extent of colluvial soils corresponds to the intensity of soil mass redistribution. At the three sites with similar environmental settings (terrain, land management, climate), it is mostly soil characteristics and profile development typical for each classification unit that resulted in different importance of colluvial soil in each study site. The study was supported by grant nr. 13-07516P of the Czech science foundation and by grant nr. QJ1230319 of the Ministry of Agriculture.

  1. Spatial variability of detrended soil plow layer penetrometer resistance transect in a sugarcane field

    NASA Astrophysics Data System (ADS)

    Pérez, Luis D.; Cumbrera, Ramiro; Mato, Juan; Millán, Humberto; Tarquis, Ana M.

    2015-04-01

    Spatial variability of soil properties is relevant for identifying those zones with physical degradation. In this sense, one has to face the problem of identifying the origin and distribution of spatial variability patterns (Brouder et al., 2001; Millán et al., 2012). The objective of the present work was to quantify the spatial structure of soil penetrometer resistance (PR) collected from a transect data consisted of 221 points equidistant. In each sampling, readings were obtained from 0 cm till 70 cm of depth, with an interval of 5 cm (Pérez, 2012). The study was conducted on a Vertisol (Typic Hapludert) dedicated to sugarcane (Saccharum officinarum L.) production during the last sixty years (Pérez et al., 2010). Recently, scaling approach has been applied on the determination of the scaling data properties (Tarquis et al., 2008; Millán et al., 2012; Pérez, 2012). We focus in the Hurst analysis to characterize the data variability for each depth. Previously a detrended analysis was conducted in order to better study de intrinsic variability of the series. The Hurst exponent (H) for each depth was estimated showing a characteristic pattern and differentiating PR evolution in depth. References Brouder, S., Hofmann, B., Reetz, H.F., 2001. Evaluating spatial variability of soil parameters for input management. Better Crops 85, 8-11. Millán, H; AM Tarquís, Luís D. Pérez, Juan Mato, Mario González-Posada, 2012. Spatial variability patterns of some Vertisol properties at a field scale using standardized data. Soil and Tillage Research, 120, 76-84. Pérez, Luís D. 2012. Influencia de la maquinaria agrícola sobre la variabilidad espacial de la compactación del suelo. Aplicación de la metodología geoestadística-fractal. PhD thesis, UPM (In Spanish). Pérez, Luís D., Humberto Millán, Mario González-Posada 2010. Spatial complexity of soil plow layer penetrometer resistance as influenced by sugarcane harvesting: A prefractal approach. Soil and Tillage Research, 110(1), 77-86. Tarquis, A.M., N. Bird, M.C. Cartagena, A. Whitmore and Y. Pachepsky, 2008. Multiscale entropy-based analyses of soil transect data. Vadose Zone Journal, 7(2), 563-569.

  2. Availability of 99Tc in undisturbed soil cores.

    PubMed

    Denys, Sébastien; Echevarria, Guillaume; Florentin, Louis; Leclerc-Cessac, Elisabeth; Morel, Jean-Louis

    2003-01-01

    Models for safety assessment of radioactive waste repositories need accurate values of the soil-to-plant transfer of radionuclides. In oxidizing environments, (99)Tc is expected to occur as pertechnetate ((99)TcO(4)(-)). Due to its high mobility, leaching of this element in the field might be important, potentially affecting the reliability of estimated transfer parameters of (99)Tc as measured in closed experimental systems such as hydroponics or pot experiments. The aim of this experiment was to measure the leaching of (99)Tc in undisturbed irrigated soil cores under cultivation as well as plant uptake and to study the possible competition between the two transfer pathways. Undisturbed soil cores (50 x 50 cm) were sampled from a Rendzic Leptosol (R), a colluvial Fluvic Cambisol (F) and a Dystric Cambisol (D) using PVC tubes (three cores sampled per soil type). Each core was equipped with a leachate collector at the bottom, allowing the monitoring of (99)Tc leaching through the cores. Cores were placed in a greenhouse and maize (Zea mays L., cv. DEA, Pioneer) was sown. After 135 d, maize was harvested and radioactivity determined in both plant and water samples. Results showed that during the growing period, leaching of (99)Tc was limited, due to the high evapotranspiration rate of maize. After harvest, leaching of (99)Tc went on because of the absence of evapotranspiration. Effective uptake (EU) of (99)Tc in leaves and grains was calculated. EU reached 70% of the input in the leaves and was not significantly different among soils. These results confirmed those obtained from pot experiments, even though leaching was allowed to occur in close-to-reality hydraulical conditions. As a consequence, it was concluded that pot experiments are an adequate surrogate for more complex "close-to-reality" experimental systems for measuring transfer factors. PMID:12915064

  3. Seasonal variability of soil aggregate stability

    NASA Astrophysics Data System (ADS)

    Rohoskova, M.; Kodesova, R.; Jirku, V.; Zigova, A.; Kozak, J.

    2009-04-01

    Seasonal variability of soil properties measured in surface horizons of three soil types (Haplic Luvisol, Greyic Phaeozem, Haplic Cambisol) was studied in years 2007 and 2008. Undisturbed and disturbed soil samples were taken every month to evaluate field water content, bulk density, porosity, ration of gravitational and capillary pores, pHKCl and pHH2O, organic matter content and its quality, aggregate stability using WSA index. In addition, micromorphological features of soil aggregates were studied in thin soil sections that were made from undisturbed large soil aggregates. Results showed that soil aggregate stability depended on stage of the root zone development, soil management and climatic conditions. Larger aggregate stabilities and also larger ranges of measure values were obtained in the year 2007 then those measured in 2008. This was probably caused by lower precipitations and consequently lower soil water contents observed in 2007 than those measured in 2008. The highest aggregate stability was measured at the end of April in the years 2007 and 2008 in Haplic Luvisol and Greyic Phaeozem, and at the end of June in the year 2007 and at the beginning of June in 2008 in Haplic Cambisol. In all cases aggregate stability increased during the root growth and then gradually decreased due to summer rainfall events. Aggregate stability reflected aggregate structure and soil pore system development, which was documented on micromorphological images and evaluated using the ration of gravitational and capillary pores measured on the undisturbed sol samples. Acknowledgement: Authors acknowledge the financial support of the Grant Agency of the Czech Republic grant No. 526/08/0434, and the Ministry of Education, Youth and Sports grant No. MSM 6046070901.

  4. Trace element concentrations in leachates and mustard plant tissue (Sinapis alba L.) after biochar application to temperate soils.

    PubMed

    Kloss, Stefanie; Zehetner, Franz; Oburger, Eva; Buecker, Jannis; Kitzler, Barbara; Wenzel, Walter W; Wimmer, Bernhard; Soja, Gerhard

    2014-05-15

    Biochar application to agricultural soils has been increasingly promoted worldwide. However, this may be accompanied by unexpected side effects in terms of trace element (TE) behavior. We used a greenhouse pot experiment to study the influence of woodchip-derived biochar (wcBC) on leaching and plant concentration of various TEs (Al, Cd, Cu, Pb, Mn, As, B, Mo, Se). Three different agricultural soils from Austria (Planosol, Cambisol, Chernozem) were treated with wcBC at application rates of 1 and 3% (w/w) and subsequently planted with mustard (Sinapis alba L.). Soil samples were taken 0 and 7 months after the start of the pot experiment, and leachate water was collected twice (days 0 and 54). The extractability (with NH4NO3) of cationic TEs was decreased in the (acidic) Planosol and Cambisol after wcBC application, whereas in the (neutral) Chernozem it hardly changed. In contrast, anionic TEs were mobilized in all three soils, which resulted in higher anion concentrations in the leachates. The application of wcBC had no effect on Al and Pb in the mustard plants, but increased their B and Mo concentrations and decreased their Cd, Cu and Mn concentrations. A two-way analysis of variance showed significant interactions between wcBC application rate and soil type for most TEs, which indicates that different soil types may react differently upon wcBC application. Correlation and partial correlation analyses revealed that TE behavior was primarily related to soil pH, whereas the involvement of other factors such as electrical conductivity (EC), organic carbon (OC) content and dissolved organic carbon (DOC) was found to be more soil and TE-specific. The application of wcBC may be a useful strategy for the remediation of soils with elevated levels of cationic TEs, but could lead to deficiencies of cationic micronutrients and enhance short-term translocation of anionic TEs towards the groundwater at high leaching rates. PMID:24631613

  5. Disturbances can control fine-scale pedodiversity in old-growth forests: is the soil evolution theory disturbed as well?

    NASA Astrophysics Data System (ADS)

    Šamonil, P.; Vaší?ková, I.; Dan?k, P.; Janík, D.; Adam, D.

    2014-10-01

    Biota-soil interactions in natural ecosystems are the subject of considerable research. Our hypothesis is that individual trees play a significant role through biomechanical and biochemical disturbances affecting soil formation in temperate forests, resulting in a complex spatial pattern of disturbance regimes and a close relationship between disturbance histories and soil units. In Žofínský Prales (Czech Republic) - the fourth oldest, continuously protected reserve in Europe and the first site of global research network SIGEO (Smithsonian Institution Global Earth Observatories) in continental Europe - we compared extensive dendrochronological, soil and pit-mound microtopography data both temporally and spatially from an area of anthropogenically unaffected 42 ha collected from 2008-2012. These data sets differ in terms of information complexity and length of memory: tree cores contain complex information about the disturbance history of the past 350 years, footprints of disturbances from the uprooting of a specific tree can persist 1700 years, and soils represent an extensive composite phenotype that has been developing for at least the entire postglacial period (10 500 years). On average, 6.18-13.41% of the canopy on individual soil units was disturbed per decade. Even though the "backbone" of key events in the development of the forest ecosystem remained the same (e.g. the 1870s, 1880s and 1980s), the internal structure of disturbance history often differed among soil units; the most exceptional were Gleysols and Histosols, where important feedback from soil to trees was expected. However, the characteristics of treethrow dynamics as well as the frequencies of stronger releases in core series also significantly differed along a gradient of terrestrial soil weathering and leaching (Haplic Cambisols - Dystric Cambisols - Entic Podzols - Albic Podzols). These results suggest the existence of several disturbance regimes within the forest, controlling fine-scale pedodiversity.

  6. Disturbances can control fine-scale pedodiversity in old-growth forest: is the soil evolution theory disturbed as well?

    NASA Astrophysics Data System (ADS)

    Šamonil, P.; Vaší?ková, I.; Dan?k, P.; Janík, D.; Adam, D.

    2014-04-01

    Biota-soil interaction in natural ecosystems is an area of considerable research. Our hypothesis is that individual trees play a significant role through biomechanical and biochemical disturbances in soil formation in temperate forest resulting in complex spatial pattern of disturbance regimes and a close relationship between disturbance histories and soil units. In Žofínský Prales (Czech Republic) - the fourth oldest, continuously protected reserve in Europe and the only SIGEO site in continental Europe - in time and space we compared extensive dendrochronological, soil and pit-mound microtopography data on an area of 42.01 ha collected in 2008-2012. The datasets differ in terms of information complexity and length of memory. Tree cores contain complex information about disturbance history of the past 350 years, footprints of the specific tree uprooting disturbance can persist 1700 years, and soils representing extensive composite phenotype have been developing for at least the entire postglacial period (10 500 years). On average, 6.18-13.41% of the canopy was disturbed on individual soil units per decade. Even though the "backbone" of key events in the development of the forest ecosystem remained the same (e.g. the 1870s, 1880s and 1980s), the internal structure of disturbance history often differed among soil units; the most exceptional were Gleysols and Histosols, where important feedback from soil to trees was expected. However characteristics of treethrow dynamics as well as frequencies of stronger releases in core series significantly differed also along a gradient of terrestrial soil weathering and leaching (Haplic Cambisols - Dystric Cambisols - Entic Podzols - Albic Podzols). Results suggest the existence of several disturbance regimes within the forest controlling fine-scale pedodiversity.

  7. SOBRE LAS IMPLICACIONES EN EL CAMPO ESCOLAR DEL TRABAJO CON TEXTOS NARRATIVOS: REFLEXIONES CONCEPTUALES Y DISEÑO DE ACTIVIDADES SIGNIFICATIVAS EN EL AULA

    Microsoft Academic Search

    ALEXA TATIANA; JIMÉNEZ HEREDIA

    The present psychoeducational method is related with the narrative texts use and it is framed in the joint work among teacher, school psychologist, and pupils. The importance of working with this sort of texts, its relation to educational proposals made by the Ministry of National Education of Colombia, the criteria for evaluating the psychological development, and the proposal itself are

  8. Study of Bearing Life for Single Row Deep Groove Ball Bearings Estudo Sobre A Vida Útil De Rolamentos Fixos De Uma Carreira De Esferas 1

    Microsoft Academic Search

    Amilton Sinatora

    The present work has the purpose of discussing the life of rolling bearings, describing the evolution of bearing life calculation until its current state of the art. Our focus is to demonstrate, simply and objectively, the inconsistencies occurring between the actual life of rolling bearings and their theoretical fatigue life estimation. For such purpose, tests were developed in a special

  9. Captura y Reconfiguración Cooptada del Estado en Guatemala, México y Colombia Análisis conceptual de las memorias de la Primera Discusión Internacional Sobre Captura y Reconfiguración Cooptada del Estado

    Microsoft Academic Search

    Luis Jorge Garay-Salamanca; Isaac de León-Beltrán; Eduardo Salcedo-Albarán

    2010-01-01

    La evidencia muestra que el narcotráfico es importante en el fortalecimiento de la corrupción de Guatemala, México y Colombia; por lo tanto, es problemático analizar de modo separado ambos fenómenos. Los hechos muestran también que las organizaciones narcotraficantes de los tres países han aprendido a regular la coerción del Estado. Este aprendizaje ha representado un salto que va desde la

  10. Role of Systematic Formative Assessment on Students' Views of Their Learning (El papel de la evaluación formativa en las percepciones de los estudiantes sobre su aprendizaje)

    ERIC Educational Resources Information Center

    Areiza Restrepo, Hugo Nelson

    2013-01-01

    This article presents a partial report of a small qualitative research study that explored the students' views of their learning during and after the implementation of formative procedures such as self-assessment, feedback, and conferences. The article also includes their perceptions about this implementation. The research was carried out with a…

  11. La investigacion sobre la calidad de los programas para ninos de hasta dos anos de edad (Research on Quality in Infant-Toddler Programs). ERIC Digest.

    ERIC Educational Resources Information Center

    Honig, Alice Sterling

    Concern about the quality of infant-toddler care programs has grown recently in response to two factors. The first is the need of employed parents for such care, and the second is research emphasizing the importance of brain development in the early years. This Spanish-language Digest introduces some of the many issues related to the quality of…

  12. EL EFECTO DE TEGETICULA YUCCASELLA RILEY (LEPIDOPTERA: PRODOXIDAE) SOBRE LA FENOLOGÍA REPRODUCTIVA DE YUCCA FILIFERA CHABAUD (AGAVACEAE) EN LINARES, N.L., MÉXICO

    Microsoft Academic Search

    Laura RENTERIA; César CANTÚ

    We registered the phenology (flowering, fruiting) and evaluated the effect of Tegeticula yuccasella Riley (Lepidoptera:Prodoxidae) on seed production of Yucca filifera Chabaud (Agavaceae). Yucca filifera flowered only once during 1998, from February to May, with peak flowering in March-April. The moth exhibited a 67% of pollinating efficiency and 3.8% of seed mortality by larvae. The highest density of T. yucassella

  13. Politica Nacional sobre Discapacidad: Un Informe del Progreso, Diciembre 2000-Diciembre 2001 (National Disability Policy: A Progress Report, December 2000-December 2001).

    ERIC Educational Resources Information Center

    National Council on Disability, Washington, DC.

    This report (written in Spanish) of the National Council on Disability (NCD) describes the nation's progress in advancing public policies to increase the inclusion, empowerment, and independence of people with disabilities in light of the Americans with Disabilities Act of 1990. The report covers December 2000 through December 2001. It reviews…

  14. EFECTO DE SOLUTOS SOBRE EL CRECIMIENTO DE HONGOS DETERIORATIVOS DE ALIMENTOS EFFECT OF SOLUTES ON GROWTH PARAMETERS OF FOOD SPOILAGE MOULDS

    Microsoft Academic Search

    M. L. Carrillo-Inungaray; M. R. Ramírez-Zapata; J. C. Martínez-Castilleja

    2006-01-01

    Growth parameters (growth rate, latency time and maximal growth) of Penicillium digitatum and Rhizopus oryzae were compared. Parameters were obtained to fit the growth curves with Baranyi model. Suspension of spores was inoculated in Sabouraud D-glucose agar with water activity adjusted at 0.80, 0.895, and 0.990 employing two organic solutes (sucrose and glycerol) and one inorganic solute (NaCl). All experiments

  15. Check It Out. FDIC Money Smart Financial Education Curriculum = Conceptos Basicos sobre Cuentas Corientes. FDIC Money Smart Plan de Educacion para Capacitacion en Finanzas.

    ERIC Educational Resources Information Center

    Federal Deposit Insurance Corp., Washington, DC.

    This module on how to choose and keep a checking account is one of ten in the Money Smart curriculum, and includes an instructor guide and a take-home guide. It was developed to help adults outside the financial mainstream enhance their money skills and create positive banking relationships. It is designed to enable participants to open and keep a…

  16. Borrowing Basics. FDIC Money Smart Financial Education Curriculum = Conceptos Basicos sobre Prestamos. FDIC Money Smart Plan de Educacion para Capacitacion en Finanzas.

    ERIC Educational Resources Information Center

    Federal Deposit Insurance Corp., Washington, DC.

    This module, an introduction to credit, is one of ten in the Money Smart curriculum, and includes an instructor guide and a take-home guide. It was developed to help adults outside the financial mainstream enhance their money skills and create positive banking relationships. It is designed to enable participants to decide when and how to use…

  17. Parenting Information for Parents: Books 1-3 (Informacion Para Los Padres Sobre La Crianza De Los Hijos: Libros 1-3).

    ERIC Educational Resources Information Center

    Moreno, Steve

    These 3 booklets provide ideas, guidelines, and activities for establishing effective parenting and are part of a series of 22 booklets specifically designed to help parents understand their children and help them to learn. The first booklet (booklet #20) discusses preparation for parenthood, infant and toddler developmental stages, the importance…

  18. Apreciaciones generales sobre Cast. /X/ Cat. [X] en el campo de Tarragona (General Considerations on the Castilian /X/ and the Catalan [X] in Tarragona).

    ERIC Educational Resources Information Center

    Cerda Masso, Ramon

    1967-01-01

    Throughout the centuries in Spain, the Castilians and Catalans have shared cultural, social, political, generational, and human experiences. This exchange was bound to have a linguistic influence of the Castilian on the Catalan language. (In Catalonia bilingualism is prevalent, and in Castile it is not.) While there have been lexical changes, the…

  19. Efecto insecticida de cuatro extractos botánicos y del cartap sobre la polilla de la papa Phthorimaea operculella (Zeller) (Lepidoptera: Gelechiidae), en el Perú

    Microsoft Academic Search

    José Iannacone; Gerardo Lamas

    2003-01-01

    y por los tres extractos de lantana y de molle. La emergencia de pupas no fue afectada por ninguna de las sustancias químicas empleadas. Además, ninguna de las sustancias químicas empleadas causaron efectos estadísticamente significativos en el porcentaje de mortalidad de adultos de P. operculella, a excepción del extracto acetónico al 10 % de molle y por cartap. Se discute

  20. EFECTO DE TRATAMIENTOS CUARENTENARIOS, COMBINANDO FRÍO Y ATMÓSFERAS INSECTICIDAS, SOBRE LA FISIOLOGÍA Y LA CALIDAD NUTRICIONAL Y SENSORIAL DE MANDARINAS 'CLEMENULES

    Microsoft Academic Search

    Cristina Rojas-Argudo; Lluis Palou; Adriana Contreras; M. Bernardita Pérez-Gago; Alicia Marcilla

    2007-01-01

    There is a need to develop new postharvest technologies that contribute to maintain the nutritional and sensory quality of fresh fruits and vegetables. The presence of vitamin C and other bioactive components, most of them with antioxidant activity, in citrus fruits gives them an important nutritional value. The application of quarantine treatments, such as low temperature exposure, might affect their

  1. Guía de aprendizaje sobre la implementación de responsabilidad social empresarial en pequeñas y medianas empresas: Cluster de proyectos Promover la competitividad a través de la Responsabilidad Social Empresarial

    Microsoft Academic Search

    Banco Interamericano de Desarrollo

    2009-01-01

    En abril de 2004, el FOMIN lanzó el Plan de Acción para el Cluster de proyectos Promover la competitividad a través de la Responsabilidad Social Empresarial. Su objetivo es ayudar a las empresas latinoamericanas, especialmente las PYME, a mejorar la competitividad a través de la adopción de prácticas de que contribuyan a la sostenibilidad económica, social y ambiental. Mediante esta

  2. CONSIDERAÇÕES SOBRE RESÍDUOS SÓLIDOS DE SERVIÇO DE SAÚDE NA INTERNAÇÃO DOMICILIAR. CONSIDERATIONS ABOUT HEALTH SOLID WASTE IN THE HOME-CARE

    Microsoft Academic Search

    Ângelo José Consoni

    RESUMO O atendimento domiciliar à saúde vem crescendo significativamente nos últimos anos. Em detrimento do manejo adequado de resíduos se tratar de boa prática, as empresas e profissionais que prestam este tipo de assistência deixam de gerenciá-lo da forma correta, seja por questões financeiras ou conhecimento. Estimativas indicam que a cidade de São Paulo pode ter 7,5 toneladas\\/dia de resíduos

  3. Estudio de casos sobre el distrés laboral en profesionales de la educación especial Case study about working stress in special education professionals

    Microsoft Academic Search

    2005-01-01

    This research seeks to describe the stress process appea- rance between the special education professionals (symptoms), state the possible causes of this stress process, analyze its costs and consequences, and offer strategies and resources for its pre- vention or treatment. So, it has been used a qualitative metho- dology of case study that has allowed to do some contributions that,

  4. FUNDAMENTOS DE UN MODELO DE FORMACIÓN PERMANENTE DEL PROFESORADO DE CIENCIAS CENTRADO EN LA REFLEXIÓN DIALÓGICA SOBRE LAS CONCEPCIONES Y LAS PRÁCTICAS

    Microsoft Academic Search

    COPELLO LEVY; MARIA INÉS; SANMARTÍ PUIG

    SUMMARY In this article, principles of one model for male and female Science teacher formation are discussed, considering as its basis the dialogical and critical reflection on concepts and practices, between the teacher and his\\/her tutor. The dialogical reflection takes place due to problems located in a concrete environment, which are scrutinized in the light of modern theoretical references regarding

  5. Fronteras del saber cientfico: reflexin epistemolgica sobre las investigaciones fundamentales y praxeolgicas en las ciencias de la educacin en torno al trabajo

    E-print Network

    Paris-Sud XI, Université de

    praxeológicas en las ciencias de la educación en torno al trabajo docente1 Javier NUNEZ MOSCOSO Doctorando en Ciencias de la Educación2 UMR ­ EFTS (Education, Formation, Travail, Savoirs) Université de Toulouse II le de Chile, Facultad de Educación Correspondencia: javier.nunez.m@gmail.com Resumen Las ciencias de la

  6. Regulando la Enfermedad a través de la Definición y la Restricción: Profesionales de la Salud Hablan sobre el VIH/SIDA1

    PubMed Central

    Rivera, Souhail Malavé; Díaz, Nelson Varas

    2009-01-01

    Resumen Las profesiones de la salud tienen un papel social dual. Por un lado, velan por el mantenimiento de la salud de la población protegiendo el bien común. Por el otro, dictaminan las formas saludables, y por lo tanto socialmente apropiadas, de ser, actuar y pensar. Este último papel, está más ligado al control social de la población que a una preocupación altruista hacia la misma. A través de esta supervisión y control, se construyen los sujetos a los cuales todos/as debemos aspirar a ser para gozar de aceptación social. Los/as profesionales de la salud han jugado un rol protagónico en dicho proceso, siendo los agentes que delimitan y definen lo que es enfermo vs. saludable, útil vs. inútil, apropiado vs. inapropiado. En el caso de la epidemia del VIH, este esfuerzo se ha hecho cada vez más vigente ya que estos/as profesionales juegan un papel importante en el tratamiento de las personas que viven con VIH/SIDA (PVVS). Sin embargo, su función está plasmada de definiciones que sirven para criminalizar a las PVVS. El objetivo de este estudio fue explorar la manera en que una muestra de profesionales de la salud en Puerto Rico construyen a las PVVS. Con este propósito, entrevistamos 80 profesionales de la salud y estudiantes de estas profesiones. Estas entrevistas fueron grabadas, transcritas y sometidas a un análisis de discurso. Los resultados reflejaron que según las personas participantes: 1) la PVVS no es una persona “normal” o funcional bajo los estándares sociales debido a que su salud no se los permite, 2) representa una carga para la sociedad incluyendo familiares, amigos/as, el mundo del trabajo, e incluso para el gobierno, 3) debe ser vigilada porque representa un riesgo para la persona seronegativa que es descrita como saludable y productiva, y 4) necesita que su salud y conducta sexual sean controladas por vía legal y/o por las personas que representan las instituciones sociales, como lo son los/as profesionales de la salud. En este artículo abordamos el potencial rol de la psicología para servir como vehículo de reconstrucción de dichas nociones, tomando en consideración su propio rol en la formación y mantenimiento de dicho sujeto socialmente deseable. PMID:22025907

  7. Atuação da Fisioterapia sobre o Tempo de Internação dos Neonatos Pré-termo Acometidos por Distúrbios Respiratórios na UTI Neo natal do Hospital Universitário São Francisco de Paula

    Microsoft Academic Search

    Ana Paula Ribeiro; Clarissa Bachini Barros; Débora Crochemore Bettin; Elenice Maahs Piper; Gabriela Lemos dos Santos; Gilcéli da Silva Fernandes; Katiúscia Naparo Mirapalhete; Lara Vergara Radmann; Flaviano Moreira da Silva

    Resumo Introdução: No Brasil observa-se um alto índice de re- cém-nascidos (RN's) pré-termo. Os RN's que apresentam complicações peri ou pós-natais, na maioria das vezes correm algum risco de morte podendo apresentar hipóxia neonatal, baixo peso ao nascer, distúrbios neurológicos e alterações respiratórias sendo encaminhados a Unida- des de Terapia Intensiva Neonatais (UTIN). Objetivo: Comparar o tempo de internação dos

  8. "Que vienen los lobos!" (Breve nota sobre el plural de los apellidos) ("May The Wolves Come:" [A Brief Note on the Plural of Surnames])

    ERIC Educational Resources Information Center

    Vivaldi, Gonzalo Martin

    1975-01-01

    This article discusses the problems that arise with the formation of plural forms of surnames in Spanish, problems both with morphology and with ambiguity. Suggestions as to how to lessen problems are made. (Text is in Spanish.) (CLK)

  9. Análisis sobre la inferencia estadística en la comprobación de la tasa de kerma de referencia en aire de lotes de semillas estériles de 125I del suministrador Bebig

    Microsoft Academic Search

    C. Rodríguez Rodríguez; A. López Fernández; P. Fernández-Letón; L. C. Martínez Gómez; R. Gilarranz; M. J. Manzanas Artigas Moreno

    The average Reference Air Kerma Rate (RAKR) for batches of sterile, undistinguishable seeds with short half-life must be inferred from the measurement of a sample of seeds. In this work we study the RAKR distri- bution of sterile 125I seeds provided by Bebig for brachytherapy treatment of prostate cancer, and we dedu- ce an adequate size of the control sample.

  10. Percepción y utilización de las fuentes de información sobre mercados y su relación con el desempeño de las Pyme recién creadas

    Microsoft Academic Search

    Claudia María Muñoz Herrera; Rocío Morales Camacho

    2009-01-01

    Resumen Diferentes autores han reconocido la importancia de la investigación de mercados, como una herramienta estratégica de mercadeo, para la toma de decisiones acertadas. Los autores de este estudio, mediante entrevistas personales, buscaron identificar las fuentes de información utilizadas por los gerentes de Pyme manufactureras de la ciudad de Cali, para la toma de decisiones de mercadeo, en la etapa

  11. Consenso de la Sociedad Española de Anatomía Patológica (SEAP) y de la Sociedad Española de Oncología Médica (SEOM) sobre la determinación de HER2 en el carcinoma gástrico

    Microsoft Academic Search

    Fernando López-Ríos; Ángel Concha; José María Corominas; Elena García-García; Mar Iglesias; José Antonio López; Santiago Ramón y Cajal; Federico Rojo; José Palacios; Francisco Vera-Sempere; Enrique Aranda; Pilar García-Alfonso; Pilar Garrido; Fernando Rivera; Carlos Gómez-Martín

    2011-01-01

    The identification of HER2 alterations in advanced gastric carcinomas is critically important in daily clinical practice as such neoplasms require specific treatment with Trastuzumab. For this reason, expert pathologists and oncologists have agreed on national guidelines for HER2 testing in gastric carcinomas. The guidelines are based on the experience of the participants and pertinent recent international publications. They outline the

  12. Informe sobre el avance del proyecto de determinaciones de V sen i para todas las estrellas B más brillantes que 6.5 mag.

    NASA Astrophysics Data System (ADS)

    Abt, H.; Levato, H.

    Se ha finalizado con la determinación de V sen i para todas las estrellas B más brillantes que 6.5 mag y al norte de -30 grados de declinación. Esta muestra involucra casi 1000 estrellas. Las observaciones fueron realizadas desde KPNO. Mientras tanto, se ha completado desde CASLEO la observación de 350 estrellas B más brillantes que 6.5 mag. al sur de -30 grados. Además de la determinación de la rotación axial se determinan, en los casos posibles, los anchos equivalentes de las líneas 4471 Ådel He I y 4481 Ådel Mg II.

  13. Guia para Madres y Padres de Familia sobre Educacion Pre-Escolar a Temprana Edad (A Parents' Guide to Early Childhood Education).

    ERIC Educational Resources Information Center

    Dodge, Diane Trister; Phinney, Joanna

    This booklet for parents explains what children learn in preschools that employ the Creative Curriculum for Early Childhood and the ways in which learning can be reinforced at home. The first sections of the booklet explain the goals and philosophy of experience-based preschools. Goals include teaching children to love reading and school and to be…

  14. IMPORTANCIA DEL SITIO WEB EN LA BANCA ONLINE: INFLUENCIA SOBRE LA CONFIANZA \\/ IMPORTANCE OF WEBSITE IN THE ONLINE BANKING: INFLUENCE ON THE TRUST

    Microsoft Academic Search

    M. J. López Miguens; L. Rodríguez Comesaña; E. González Vázquez

    2010-01-01

    En este trabajo se analiza la incidencia de la calidad del sitio web financiero en la generación de confianza que los usuarios del mismo desarrollan hacia el canal Internet. Se discute, con ese fin, la hipótesis que establece una relación entre ambos constructos y que permitirá comprobar si el diseño, estructura de navegación y la información contenida en el sitio

  15. 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

    Microsoft Academic Search

    A. E. Piatti; J. F. C. Santos; J. J. Clariá; E. Bica; A. Sarajedini; D. Geisler

    2000-01-01

    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

  16. Una primera parte (terica), sobre la Optimizacin, desde la perspectiva psicopedaggica y clnica,de la intervencin psicoeducativa en el Trastorno

    E-print Network

    Escolano, Francisco

    : · AnalizarlarealidaddelossujetosconTDAH,desdesuprimera infancia hasta la entrada en la edad adulta. ·Promovercompetenciasenelalumnadoquelespermitadesarrollar las aptitudes de los menores conTDAH,para desenvolverse mejor por las diferentes trayectorias

  17. Exhibicin de Arte sobre el Ocano Coastal America Por favor complete, imprima y firme el Formato de Registro y el Formato de Liberacin mostrados a

    E-print Network

    Tullos, Desiree

    el participante es menor a 18 años de edad, este Formato deberá ser firmado tanto por el participante participante es menor de 18 años de edad, la Liberación deberá ser firmada por alguno de los padres o tutor del Registro Información del Participante Nombre: Edad: Grado (si aplica): Dirección postal: Ciudad: Estado

  18. Memorias del Segundo Simposio Internacional Sobre Polticas, Planificacin y Economa de los Programas de Proteccin Contra Incendios Forestales: Una Visin Global Remfiresat, Gestin de Emergencias en

    E-print Network

    Standiford, Richard B.

    las tecnologías espaciales disponibles para la gestión de los incendios forestales. Un consorcio Aeroespaciales). Departamento de Estudios y Misiones, P° Pintor Rosales, 34, Madrid, CP 28008. 3 Ingeniero de Sistemas, INSA INSA (Ingeniería y Servicios Aeroespaciales). Departamento de Estudios y Misiones, P° Pintor

  19. FACTORES QUE INFLUYEN SOBRE LA EMERGENCIA DE PLÁNTULAS DE BORRAJA (BORAGO OFFICINALIS L.) FACTORS INFLUENCING BORAGE (BORAGO OFFICINALIS L.) SEEDLING EMERGENCE

    Microsoft Academic Search

    Alejandro Solís; Rosemarie Wilckens; Maritza Tapia; Susana Fischer; Daniel Sorlino; Marisol Berti

    Background: Borago officinalis L. seeds and the whole plant are used as medicinal plants. Gamma linolenic acid, an important essential fatty acid from the omega-6 family is present in its seeds. Objectives: To analyze the effect of the seeding depth, seed maturity, germination promoters, and\\/or stratification on the emergence percentage, vigor index and time to reach a 50% emergence were

  20. Guia para la Ensenanza Combinada de Ingles y Ciencia. Para Padres/sobre Padres. (A Guide to Teaching English and Science Together. For Parents/about Parents).

    ERIC Educational Resources Information Center

    Schwartz, Wendy

    In the past, students who knew only a little English (called limited English proficient, or LEP), were usually taught only low-level science and mathematics. Now, new science and mathematics teaching methods can help LEP students get a good education in both fields. This guide will help parents know if their children are learning as much as…

  1. Presentacin Entre los das 3 y 14 de junio del ao 1992, se celebr la Conferencia de las Naciones Unidas sobre Medio

    E-print Network

    Escolano, Francisco

    Unidas (ONU) para promover el desarrollo sostenible entendido como mejora de la calidad de vida de la el Desarrollo Sostenible gracias a la aprobación del programa de la Agenda 21 que se fué ejecutando 3400 Fax: (+34) 96 590 3464 Agenda 21UA. Medio Ambiente y Desarrollo Sostenible #12;

  2. The Portugal Project: Adult Education in a Socio-economic Perspective. Paper for the Course, "Curso sobre Educacao de Adultos." Document No. 1.

    ERIC Educational Resources Information Center

    Erasmie, Thord

    Education is one of the major problems connected with the economic and social distribution of the total resources of the world. Examples of the educational gap between rich and poor countries can be seen by statistical comparisons between Peru and Czechoslavakia and between Guatemala and Denmark which show how unevenly educational resources are…

  3. Simposio sobre Educacion de Ninas: Evidencias, Temas, Acciones. Actas de sesiones. (Symposium on Girls Education: Evidence, Issues, Actions. Proceedings). (Washington, DC, May 17-18, 2000).

    ERIC Educational Resources Information Center

    Agency for International Development (IDCA), Washington, DC.

    This symposium highlighted core issues of controversy in girls' education and developed implications for policy and practice. Its evidence-based discussion forum encouraged dialogue, debate, and increased interaction and developed partnerships among academic institutions, nongovernmental organizations, multilateral development agencies, and other…

  4. Educação Ambiental e Construção de Horta Orgânica na Escola: Um Alerta sobre o Cultivo e o Consumo de Produtos com Agrotóxicos

    Microsoft Academic Search

    Patricia Carla Di Giovanni; Camila Brunhari Zanetti

    The occupation of naturals spaces for human beings has provocated impacts on earth and its degradation. So, the Environmental Education came to emphasize this work and wants to touch human being to renovate the environment, taking a turn for the better of life's quality in the present and of future generations. This project wants to put into practice the Environmental

  5. EFECTO DE LA CONDICIÓN CORPORAL AL PARTO SOBRE EL COMPORTAMIENTO REPRODUCTIVO Y VARIACIÓN DE PESO CORPORAL POSTPARTO DE VACAS MESTIZAS LECHERAS

    Microsoft Academic Search

    Libardo Maza; Roger Salgado O

    Body condition and body weight at birth have a direct relation, as with postpartum reproductive behavior as with post partum weight change. Being in mind that cows with extreme body condition score at birth, as too low <3.0 as too high >4.0 in a 1-5 scale, showed less reproductive behavior, in relation to the cyclical luteal ovarian activity, silent estrus

  6. Sistema de cúmulos globulares de la galaxia lenticular NGC 6861: en busca de indicios sobre la formación de las S0s.

    NASA Astrophysics Data System (ADS)

    Escudero, C. G.; Faifer, F. R.; Bassino, L. P.; Calderón, J. P.; Caso, J. P.

    We present a preliminar photometric study of the globular cluster system (GCS), associated to the lenticular galaxy (S0) NGC 6861, which is located in a low density environment (d˜31.8 Mpc). It is based on GEMINI/GMOS images (GS-2010B-Q-2: PI Lilia P. Bassino) in the filters g', r', i' of three fields, one of them centered in the galaxy. We find a large number of GCs candidates and detect the presence of at least two sub-populations of GCs (``blue''/metal-poor and ``red''/metal-rich). The spatial distribution of ``red'' candidates presents a higher concentration toward the galaxy (associated to the bulge?), while the distribution of ``blue'' candidates is more homogeneus over the three fields (associated to the halo?). In the color-magnitud diagram, the ``blue'' GC candidates show a possible mass-luminosity relation, known as ``blue-tilt'', probably detected for the first time in a lenticular galaxy. FULL TEXT IN SPANISH

  7. Evaluación de impacto de las fases I y II del sistema de transporte masivo TransMilenio sobre el tiempo total de desplazamiento de los usuarios del tr

    Microsoft Academic Search

    Jorge Andrés Perdomo Calvo; Hasbleidy Castañeda; Juan Carlo Mendieta

    2010-01-01

    El transporte público de Bogotá, durante décadas, ha representado uno de los grandes problemas por resolver en la ciudad. Con el fin de mejorar su eficiencia, fue implementado el sistema de transporte masivo TransMilenio (TM); cuyo objetivo principal, consiste en disminuir el tiempo total de viaje (acceso, espera y desplazamiento dentro del vehículo) para los usuarios. Por consiguiente, el presente

  8. Las vinazas de los jugos de caña energética más miel final y su impacto sobre el medio ambiente en la destilería Paraíso de la Provincia de Santi Spíritus

    Microsoft Academic Search

    Susana Mirían Perdigón Martín; Raquel de la Cruz Soriano; Joaquín Obregón Luna; Irenio Curbelo Tribicio

    2005-01-01

    The waste originated in the sugar and derived industry can become by-products, with certain economic value and at the same time, to avoid the impact to the environment that would cause their incorrect disposition. The impact is presented that causes in the environment the still vinaza. Presently work is approached the study of environmental impact as an element of special

  9. Evaluación de la frecuencia de corte y tipos de fertilización sobre tres genotipos de pasto elefante (Pennisetum purpureum). 1. Rendimiento y contenido de proteína

    Microsoft Academic Search

    Freddy Márquez; José Sánchez; Diannelis Urbano; Ciro Dávila

    In order to evaluate the effect of the cutting frequency and types of nitrogen fertilization on three elephant grass genotypes, a field trial was carried in the Universidad de Los Andes farm, in El Vigia, Merida state, Venezuela, located at 67 masl. A random bocks design with three replications was used; treatments were two cutting frequencies (F1: 49 and F2:

  10. Respuesta de la administración al informe final del grupo asesor independiente sobre sostenibilidad: De la gestión de riesgos al aprovechamiento de nuevas oportunidades

    Microsoft Academic Search

    Banco Interamericano de Desarrollo

    2011-01-01

    En febrero de 2011, el GAI presentó a la Comisión General y la Administración su Informe Final, en el que se llegó a la conclusión de que las salvaguardias ambientales y sociales previstas en la Política de Medio Ambiente y Cumplimiento de Salvaguardias eran adecuadas, pero se recomendaron no obstante medidas adicionales para fortalecer la capacidad del Banco de cumplir

  11. in Arboleda, Luis Carlos & Paty, Michel (eds.), Formacin de Cultura Cientfica en Colombia. Ensayos sobre Matemticas y Fsica, Instituto de Educacin y

    E-print Network

    Paris-Sud XI, Université de

    115 in Arboleda, Luis Carlos & Paty, Michel (eds.), Formación de Cultura Científica en Colombia (Colombia), 2004, p. 111-151. FORMACI�N Y DESARROLLO DE LA CULTURA CIENTÍFICA EN COLOMBIA: LA FÍSICA DE 1880 introducidas y enseñadas en Colombia desde los tiempos de la Colonia (1550-1810), principalmente en Santafé de

  12. Mobilidades: um novo direito s cidades/metrpoles? Redes de transporte e produo do espao urbano: Tours e Salvador sobre novos trilhos

    E-print Network

    Paris-Sud XI, Université de

    Tema Mobilidades: um novo direito às cidades/metrópoles? Título Redes de transporte e produção do a questão da mobilidade e do direito à cidade, proposto pelo Seminário Diálogos França Brasil 2012. O texto

  13. EFEITO DA ADUBAÇÃO ORGÂNICA SOBRE AS FRAÇÕES DE CARBONO DE SOLOS CUL TIVADOS COM ALFACE AMERICANA Organic fertilizer effects upon carbon fractions from soils cultivated with iceberg lettuce

    Microsoft Academic Search

    Edilene Carvalho Santos Marchi; Marco Antônio Rezende Alvarenga; Giuliano Marchi; Carlos Alberto Silva; Jarso Luiz de Souza Filho

    This study evaluated the effects of organic and mineral fertilizers and liming, on humic, fulvic, and organic carbon fractions of an Inceptisol and an Oxisol grown with lettuce. The experiment was carried out at the Soil Science Department of Federal University of Lavras, Minas Gerais state, Brazil. It was performed with 5 levels of soil conditioner (0, 20, 40, 100,

  14. Normativa sobre cambios de Segunda Lengua (o Lengua C) en los Grados impartidos en la Facultad de Filosofa y Letras de la UAM

    E-print Network

    Autonoma de Madrid, Universidad

    "Estudios de Asia y África", "Estudios Hispánicos", "Estudios Ingleses", "Lenguas Modernas, Cultura y mismo curso si hubiera plazas vacantes en la asignatura de su interés. 8) En ningún caso se garantizara Idiomas Modernos del grado de Estudios de Asia y África". #12;

  15. Kathy Finds Out about the Introduction of Solids. Mother-to-Mother Support = Josefa Descubre Conocimientos sobre la Introduccion de Solidos. Apoyo Madre a Madre.

    ERIC Educational Resources Information Center

    Magalhaes, Rebecca; Stone-Jimenez, Maryanne; Allen de Smith, Paulina; Smith, Natalia

    These magazine-sized booklets, one in English, one in Spanish, are in cartoon format and are designed to be used by people with limited literacy in English or Spanish. This booklet explains that exclusive breastfeeding means giving no water, liquids, or food; breast milk contains sufficient water to satisfy the baby's thirst; at about 6 months,…

  16. International Work Group for Indigenous Affairs Newsletter, July 1991-December 1992 = Boletin de Grupo Internacional de Trabajo sobre Asuntos Indigenas, Septiembre 1991-Diciembre 1992.

    ERIC Educational Resources Information Center

    IWGIA Newsletter, 1992

    1992-01-01

    This document contains seven consecutive English-language issues of the IWGIA Newsletter, from July 1991 through December 1992, followed by the seven corresponding issues in Spanish. These newsletters provide educators with a resource on the history, current conditions, and struggles for self-determination of indigenous peoples around the world.…

  17. El primer examen de las Pruebas de Acceso a la Universidad en la UA se centra en un texto sobre Torrente de Santiago Segura

    E-print Network

    Escolano, Francisco

    Torrente de Santiago Segura Alicante, 9 de junio de 2011 "Torrente y la clase política". Con este artículo, Torrente, la clase política actual en España y la o las crisis que vive el país, ha sido el escogido para

  18. Otra perspectiva sobre lo que los ninos deben estar aprendiendo (Another Look at What Young Children Should Be Learning). ERIC Digest.

    ERIC Educational Resources Information Center

    Katz, Lilian G.

    This Spanish-language ERIC Digest addresses the question of what young children should be learning that will best serve their development and learning in the long term. Two major dimensions of development--normative and dynamic--are explored, and four categories of learning goals are discussed: (1) knowledge; (2) skills; (3) dispositions; and (4)…

  19. Perspectivas sobre las escuelas charter: Una resena para padres de familia (Perspectives on Charter Schools: A Review for Parents). ERIC Digest.

    ERIC Educational Resources Information Center

    Donahoo, Saran

    Recently, charter schools have gained popularity with parents, students, and others as alternatives to public schools, but what are charter schools and what effects are they having? This Spanish-language Digest defines charter schools and clarifies some of the administrative and legal details surrounding such schools. The Digest also lays out some…

  20. EFECTOS DE LA ISQUEMIA FOCAL SOBRE LA INTERACCION GLIA - NEURONA: UN ANALISIS BASADO EN LA EXPRESION DE TRANSPORTADORES DE GLUTAMATO, LAS CELULAS GLIALES Y LAS INTERNEURONAS CORTICALES

    Microsoft Academic Search

    Adriana Medina; Martha I Escobar

    Glial cells are the most numerous cellular population in the Central Nervous System. The astrocitic network, known as the glial sincitium is a major feature in the preservation of neural tissue homeostasis. The network function includes neurotransmitter uptake at the synaptic cleft, the maintenance of ionic gradients and the distribution of molecules for ener gy supply. This article focus on

  1. Esbs de soluci a l'examen d'IAT (01.02.03) 1. [un punt per frase, puntuada sobre 8

    E-print Network

    Forcada, Mikel L.

    /verb), "droga" (nom/verb)". De les setze interpretacions, n'hi ha dues sintàcticament vàlides: 1: det n pron v 2: pron v det n g) Ambigüitat lèxica per anàfora: el pronom relatiu "que" pot tenir dos antecedents: el SN

  2. Os primeiros curadores da humanidade: abordagens psicológicas e psiquiátricas sobre os xamãs e o xamanismo Humanity's first healers: psychological and psychiatric stances on shamans and shamanism

    Microsoft Academic Search

    STANLEY KRIPPNER

    Background: the author describes shamans as practitioners who deliberately shift their phenomenological pattern of attention, perception, cognition, and awareness in order to obtain information not ordinarily available to members of the social group that granted them privileged status. Objectives: to describe how these phenomenological shifts were accomplished and used. Methods: archival studies of shamanic literature as well as field research

  3. Reunión de Consenso sobre la biopsia selectiva del ganglio centinela en el cáncer de mama. Sociedad Española de Senología y Patología Mamaria

    Microsoft Academic Search

    A. Piñero; J. Giménez; B. Merck; C. Vázquez

    2007-01-01

    Selective biopsy of the sentinel node is a useful diagnostic technique in the management of breast cancer that has been introduced into the clinical practice and is widely used and accepted. Based on its results, adequate staging can be made with less associated morbidity. However, at present, there are many methodological variations in how it is done that are pending

  4. ACORDO DO CONSELLO DE GOBERNO DO 27 DE FEBREIRO, POLO QUE SE MODIFICA O ARTIGO 7.2 E 9 B) DO REGULAMENTO SOBRE MOBILIDADE

    E-print Network

    Fraguela, Basilio B.

    ACORDO DO CONSELLO DE GOBERNO DO 27 DE FEBREIRO, POLO QUE SE MODIFICA O ARTIGO 7.2 E 9 B) DO estudante por titulación. Esta limitación, porén, pode resultar incompatible co novo marco de elixibilidade polo OAPEE determinan que só acadarán financiamento do OAPEE as estadías de cinco meses. Sendo isto así

  5. Efectos de extractos acuosos de la maleza Cyperus rotundus L. (Cyperaceae) sobre la germinación de semillas y crecimiento de plántulas de maíz (Zea mays L.) cv. Pioneer 3031

    Microsoft Academic Search

    José A. Laynez-Garsaball; Jesús Rafael Méndez-Natera

    The objective of this experiment was to determine the effects of foliage water extracts of purple nutsedge (Cyperus rotundus L.) on seed germination and seedling growth of corn ( Cyperus rotundus L.) on seed germination and seedling growth of corn ( Cyperus rotundus Zea mays L.) cv. Pioneer 3031. An extract was prepared with nutsedge foliage of 15 days at

  6. Confesionario breve, en lengua mexicana y castellana 

    E-print Network

    Molina, Alonso de, d. 1585

    2011-03-25

    ?metro de Dominio de Tiempo (RDT). (Esta secci?n solamente describe los sensores ECH2O ? .) Funcionamiento Estos sensores proporcionan las lecturas de los contenidos volum?tricos de agua en el suelo a la profundidad a la que se colocan (m 3 de agua/m 3... terreno con el fin de dar seguimiento al movimiento del agua del suelo y a su agotamiento dentro de la zona radicular. Esto permitir? monitorear la humedad y determinar el uso del agua por el cultivo a trav?s del tiempo. Ya que los sensores miden el...

  7. EFECTO DE LA TEMPERATURA DE SECADO SOBRE LA DEGRADACIÓN DE CAROTENOIDES EN FRUTOS DE COROBA (Jessenia polycarpa Karst) EFFECT OF DRYING TEMPERATURE ON DEGRADATION OF CAROTENOIDS IN COROBA (Jessenia polycarpa Karst) FRUITS EFECTO DA TEMPERATURA DE SECADO SOBRE A DEGRADACIÓN DE CAROTENOIDES EN FROITOS DE COROBA (Jessenia polycarpa Karst)

    Microsoft Academic Search

    D. R. Belén-Camacho; M. J. Moreno-Álvarez; R. Alemán; F. Álvarez

    2004-01-01

    Coroba (Jessenia polycarpa Karst) is a palm whose fruit is useful as food because it is a source of fat, fiber, minerals, carbohydrates and carotenoids. In order to increase the utility of coroba fruit as flour, its mesocarp must be dried, but this operation can reduce the carotenoid content. In this research, the effect of drying temperature on the total

  8. Essays on Eclipses, Transits and Occultations as Teaching Tools in the Introductory Astronomy College Course. (Spanish Title: Ensayos sobre Eclipses, Tránsitos y Ocultaciones Como Herramientas de Enseñanza en el Curso Universitario Introductorio a la Astronomía.) Ensaios sobre Eclipses, Trânsitos e Ocultações Como Ferramentas de Ensino em um Curso Universitário Introdutório de Astromomia

    NASA Astrophysics Data System (ADS)

    Dcruz, Noella L.

    2014-07-01

    We occasionally include projects in our learner-centered introductory astronomy college course to enable non-science major students explore some astronomical concepts in more detail than otherwise. Such projects also highlight ongoing or upcoming astronomical events. We hope that students will feel more interested in astronomy through projects tied to astronomical events. In Spring 2012, we offered short essays focused on eclipses, transits and occultations to promote the rare transit of Venus that occurred on June 5th, 2012. We asked students to write two short essays from three that were offered. The essays contained descriptive and conceptual parts. They were meant to serve as teaching tools. 62% of 106 essays from 55 students earned A, B or C grades. 21% of 47 feedback survey respondents felt the essays increased their interest in astronomy. 49% of respondents felt that the essays were not educationally beneficial and should not be offered again. The most common written response to our survey indicated that students need more guidance and better preparation in writing successful essays. Since students found the conceptual parts of the essays difficult, in the future we will provide relevant activities prior to essay deadlines to help students create successful essays. Ocasionalmente, incluimos proyectos en nuestro curso de introducción a la astronomía universitario centrado en el alumno para permitir que los estudiantes de carreras no científicas exploren algunos conceptos astronómicos en más detalle que lo habitual. Estos proyectos también ponen en relevancia eventos astronómicos en curso o futuros. Esperamos que los estudiantes se sientan más interesados en la astronomía a través de proyectos vinculados a eventos astronómicos. En el período de primavera de 2012 (EUA), propusimos breves ensayos centrados en los eclipses, tránsitos y ocultaciones para promover el raro tránsito de Venus que se produjo el 5 de junio de 2012. Le pedimos a los estudiantes que escribieran dos ensayos cortos de tres que se proponían. Los ensayos contenían partes descriptivas y conceptuales. Los mismos estaban destinados a servir como herramientas de enseñanza. 62% de los 106 ensayos de 55 estudiantes obtuvo grados A, B o C. 21% de los 47 encuestados que respondieron al cuestionario posterior consideró que los ensayos aumentaron su interés por la astronomía. 49% de los encuestados consideró que los ensayos no eran educacionalmente útiles y que no deben ser propuestos de nuevo. Las respuestas escritas más comunes a nuestra encuesta indicaran que los estudiantes necesitan más orientación y una mejor preparación en la redacción de ensayos exitosos. Dado que los estudiantes encontraron las piezas conceptuales de los ensayos difíciles, en el futuro vamos a ofrecer actividades pertinentes antes de los plazos de redacción para ayudar a los estudiantes a crear ensayos de mayor calidad. Nós ocasionalmente incluímos projetos em nosso curso universitário introdutório centrado no aluno para permitir aos estudantes que pertencem às carreiras não científicas explorar alguns conceitos astronômicos em mais detalhes do que o normal. Tais projetos também enfatizam eventos astronômicos em curso ou futuros. Esperamos que os alunos se sintam mais interessados na astronomia através de projetos ligados a eventos astronômicos. No termo de Primavera de 2012 (EUA), propomos ensaios curtos focados em eclipses, trânsitos e ocultações para promover o raro trânsito de Vênus que ocorreu no dia 5 de junho de 2012. Pedimos aos alunos que escrevessem dois ensaios curtos dentre três que foram propostos. Os ensaios continham partes descritivas e conceituais. Eles foram feitos para servir como ferramentas de ensino. 62% de 106 ensaios de 55 alunos ganhou graus A, B ou C. 21% dos 47 entrevistados que responderam ao levantamento posterior sentiu que os ensaios aumentaram seu interesse na astronomia. 49% dos inquiridos consideraram que os ensaios não eram benéficos para a educação e que não devem ser propostos novamente. As resp

  9. INTRODUCCIN AL "WEB SOIL SURVEY" Y EL "SOIL DATA MART" DEL NRCS Jorge L. LugoCamacho

    E-print Network

    Gilbes, Fernando

    INTRODUCCIÓN AL "WEB SOIL SURVEY" Y EL "SOIL DATA MART" DEL NRCS Jorge L. LugoCamacho MLRA Americanas. El Web Soil Survey (WSS) provee acceso a los mapas de suelos y les permite a los usuarios obtener información precisa y al momento. El Soil Data Mart permite descargar la información geográfica

  10. MEtabolisMo y DEficiEncia DE zinc En bovinos

    Microsoft Academic Search

    Rosa DE; Mattioli Ga

    Resumen: El Zn resulta esencial como mineral traza por su rol estructural, catalítico y regula- torio de la actividad celular. Las funciones más comprometidas durante su carencia serían la expresión génica, la defensa antioxidante del organismo y el consumo de alimento. Los forrajes y granos pueden no cubrir los requerimientos del animal cuando crecen en suelos carentes o se destinan

  11. Una revolución (no tan) silenciosa. Claves para repensar el agro en Argentina

    Microsoft Academic Search

    Roberto Bisang; Guillermo Anlló; Mercedes Campi

    Introducción La relación entre las producciones agropecuarias y el desarrollo de la economía argentina tiene una larga y compleja historia. En sus orígenes, este sector -en base a una mezcla de expansión de la frontera territorial, la calidad de suelos y climas y la importación\\/adaptación de tecnología, sumado a los recursos humanos- fue el motor del crecimiento aunque con deudas

  12. Modelos de estados y transicines: nuevas aplicaciones en contexto mundial

    E-print Network

    Modelos de estados y transiciónes: nuevas aplicaciones en contexto mundial Brandon T. Bestelmeyer predicciones a los encargados Necesitamos sistemas de conocimiento espacial que son fácilmente disponible a los posibles en la vegetación y suelos por cada sitio ecologico · Modelos estado y transición son archivos de

  13. Rangeland Ecol Manage 65:638646 | November 2012 | DOI: 10.2111/REM-D-12-00021.1 A Strategy for Rangeland Management Based on Best Available Knowledge and

    E-print Network

    de sistemas de conocimiento integrales (KSs)--colecciones de recursos (ej., datos, herramientas anal modelos conceptuales. Un KS integrado podr´ia definir la relevancia por atributos ecol´ogicos (ej., suelos sistemas de conocimiento. Falta de referencias geogra´ficas consistentes del conocimiento; documentaci

  14. Actuar en asociacin Regin del Gran Atlas, Marruecos

    E-print Network

    Actuar en asociaciòn Región del Gran Atlas, Marruecos #12;39 ··· En el àmbiti international ··· En Mahidol, Tailandia) · Mejoramiento de la fertilidad de los suelos en Tailandia y en Laos · Prevención de Medio Oriente. En Marruecos, el número de programas aumentó considerablemente, como resultado de una

  15. Este estudio examina los factores demogrficos asociados con la deforestacin en el Par-que Nacional Sierra de Lacandn (PNSL), Guatemala, utilizando un anlisis de regresin

    E-print Network

    Lopez-Carr, David

    - que Nacional Sierra de Lacandón (PNSL), Guatemala, utilizando un análisis de regresión multinivel. Más. Palabras clave: usos del suelo, deforestación, crecimiento demográfico, regresión multini- vel, Guatemala análisis multinivel de población y deforestación en el Parque Nacional Sierra de Lacandón (Petén, Guatemala

  16. Estimacin de la Recarga por Retorno de Riego a partir de la

    E-print Network

    Politècnica de Catalunya, Universitat

    controlado por p y g · k suelo no saturado es función o p Considera ( ) ( ) ( ) ( ) 1w H h z h J K h k h K h Richards Planta-Modelo Feddes Parámetros no saturados-Modelo van Genuchten Solución Inversa ROSETTA (FETs Joaquín Jiménez CONCEPTOS PREVIOS : succión ( = -h) Richards (1931) C(): capacidad específica (pendt

  17. Análisis económico de la “bio-carbonización” como práctica de manejo agrícola

    Microsoft Academic Search

    Juan Andrés Ramírez; Ramón Rosales

    2009-01-01

    Las altas concentraciones de gases de efecto invernadero, específicamente CO2, han sido señaladas como la principal causa del cambio climático. La adopción de prácticas agrícolas capaces de incrementar el contenido de carbono en el suelo, ha sido propuesta como una estrategia de bajo costo y disponibilidad inmediata para enfrentar este fenómeno. La Bio-carbonización es una de estas prácticas agrícolas, la

  18. Tipologías de expansión metropolitana en Santiago de Chile: precariópolis estatal y privatópolis inmobiliaria

    Microsoft Academic Search

    Rodrigo Hidalgo Dattwyler; Axel Borsdorf; Hugo Marcelo Zunino; Lily Álvarez Correa

    2008-01-01

    Una de las principales manifestaciones de cambio que se viven hoy en las grandes ciudades de América Latina, y del tercer mundo en general, tienen que ver con la con las modificaciones recientes que se manifiestan en los usos del suelo de sus periferias. El trabajo busca otorgar antecedentes empíricos y lecturas teóricas al modo en que se están gestando

  19. ORIENTATION WEEK / SEMANA DE ORIENTACIN / SETMANA D'ORIENTACI February 2014 / febrero 2014 /febrer 2014 (2

    E-print Network

    Politècnica de Catalunya, Universitat

    and culture Taller sobre lengua y cultura catalana Taller sobre llengua i cultura catalana Session 2 /Sesión 2 lengua y cultura catalana Taller sobre llengua i cultura catalana Session 3 /Sesión 3 / Sessió 3 JUST on Catalan language and culture Taller sobre lengua y cultura catalana Taller sobre llengua i cultura

  20. POESIA E TECNOLOGIA POETRY AND TECNOLOGY

    Microsoft Academic Search

    Patrícia Ferreira da Silva

    RESUMO: Este trabalho apresenta um breve relato sobre o impacto das mudanças nos meios materiais sobre nosso pensamento e subjetividade. Também apresenta um comentário sobre dois poemas produzidos no contexto das novas tecnologias: \\