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1

The sitting statue of Vargas.  

PubMed

Medicine and health care in Venezuela have had a roller coaster evolution in parallel with advances and retreats of democracy and of efforts to modernize. The most prominent of the founding fathers of Venezuelan medicine has a sitting statue in the homonymous hospital. After a blossoming of medicine, health care, and research led by dermatology that lasted for nearly four decades, the system went into a tailspin that mirrors what took place in the governmental institutions and in the economy. The statue of Vargas seems to warn Venezuelans that if the decay goes too far, it may become irreversible. PMID:21679877

Goihman-Yahr, Mauricio

2

Sacrificio, violencia y nación en Lituma en los Andes de Mario Vargas Llosa  

Microsoft Academic Search

This paper addresses gender, nation and sacrifice as central elements in Lituma en los Andes (1993), a novel published by Mario Vargas Llosa after he ran unsuccessfully for the Peruvian presidency. The book presents a number of masculine models that are either inadequate, romanticized or brutal and sets them against a backdrop of a Peru deep in the economic and

Cesar Valverde

2012-01-01

3

Inventing the Self, Fictionalizing the Other: False Memories in the Theatre of Mario Vargas Llosa  

Microsoft Academic Search

The Peruvian writer Mario Vargas Llosa, one of the most prolific and distinguished Spanish American novelists of the twentieth century and the winner of the 2010 Nobel Prize in Literature, is also the author of eight plays, which have frequently been overshadowed by his narrative production. Going beyond the relationship traced by critics between his novels and his plays, this

Priscilla Meléndez

2012-01-01

4

José María Vargas (1786-1854): Reformer of Anatomical Studies in Venezuela.  

PubMed

José María Vargas (1786-1854): Venezuelan medical doctor, surgeon, optician, anatomist, chemist, botanist, professor, geologist, mineralogist, and mathematician. Second President of Venezuela (1835-1836), First republican dean, he reformed medicine studies in 1827 establishing human anatomical dissection in the Universidad Central de Venezuela where he taught human anatomy between 1827 and 1853 along with surgery and chemistry. In 1838, he wrote Curso de Lecciones y demostraciones Anatómicas, the first book on the subject printed in Venezuela for the teaching of human anatomy. Clin. Anat., 2013. © 2013 Wiley Periodicals, Inc. PMID:23650143

Reverón, Rafael Romero

2013-05-01

5

Representations of the French Language in the Detective Novel Sous les vents de Neptune by Fred Vargas  

Microsoft Academic Search

This essay studies the role played by the two equally important varieties of the French language (Québécois and Parisian) present in Sous les vents de Neptune (2004) by Fred Vargas, and sets the novel in the context of recent debates about the French language. Many topics in these debates are not so new, such as the inseparable link between language

Kathleen Shields

2010-01-01

6

CARTAS DE PRESOS POLÍTICOS E DE SEUS FAMILIARES: VIOLÊNCIA E ATUAÇÃO FEMININA NO GOVERNO VARGAS. 1930-1945  

Microsoft Academic Search

Resumo: Para a análise do tema da repressão durante o governo Vargas (1930-1945), as cartas de presos políticos e de seus familiares revelaram ser fontes valiosas para a percepção do alcance e dos significados para parte da sociedade do poder repressivo empregado por este governo no combate a seus \\

Janete Leiko TANNO

2005-01-01

7

EL ESTADO EN LOS MONTES DE MARIA  

Microsoft Academic Search

Se pretende en el presente trabajo, mostrar las carcatristicas que presenta el Estado en los Montes de María (1) (departamentos de Sucre y Bolívar, republica de Colombia), en el cual se resalta la naturaleza mafiosa y politiquera de un Estado que ya no existe como tal y que se ha convertido en feudos de la politiquería local. Igualmente, se hace

Daniel Menco Rivera

2009-01-01

8

Estados que requieren cobertura de los costos de estudios clínicos  

Cancer.gov

Una lista de búsqueda y el mapa de los estados de EE.UU. requieren que los planes de salud para pagar los costos de la atención del paciente asociados con ensayos clínicos. Las principales disposiciones se resumen.

9

H3+: superficies de energía potencial, estados y transiciones rovibracionales  

NASA Astrophysics Data System (ADS)

Hemos calculado varias superficies globales de energía potencial para el estado fundamental y excitados del sistema H3+ en más de ocho mil geometrías diferentes usando una base (9s 3p 1d)/[4s 3p 1d] en cada átomo de Hidrógeno y mediante un método de cálculo de interacción de configuraciones completa (FCI). Hemos ajustado las superficies a formas analíticas del tipo Aguado y Paniagua con un error promedio menor de 50 cm-1 y menor en el pozo de potencial del estado fundamental. Finalmente hemos calculado y analizado los niveles vibracionales para los dos estados electrónicos más bajos, siendo la desviación respecto de los mejores valores publicados, tanto experimentales como teóricos, de unos pocos números de onda.

Aguado, M. Paniagua Y. A.

10

Deep co-add stack (DCS) sample (Varga+, 2012)  

NASA Astrophysics Data System (ADS)

For the present analysis, we use the 1400-MHz radio data from the VLA FIRST survey (Becker et al., 1995ApJ...450..559B) and the u-, g-, r-, i- and z-band optical images from the SDSS Stripe 82 co-added data set (Abazajian et al., 2009ApJS..182..543A). (1 data file).

Varga, J.; Csabai, I.; Dobos, L.

2013-04-01

11

Paleoenvironmental and paleoclimatic investigations on Isla de los Estados, Argentina  

NASA Astrophysics Data System (ADS)

The expedition in November-December 2005 to Isla de los Estados (Staten Island) off the southeastern tip of South America was a cooperative venture between Lund University (LU) and Stockholm University (SU) in Sweden and the CADIC-CONICET Institute in Ushuaia, Argentina. The aim of the expedition was threefold: (1) to extend the Swedish paleoclimatic "ATLANTIS"-project (Greenland, Iceland, Faroe Islands, Azores, Grenada, Tristan da Cunha; PI S Björck) to the southern part of the South American continent, (2) to connect earlier glacial and climate history reconstructions from the Antarctic Peninsula to equivalents north of the Drake Passage in southernmost South America, and (3) to complement paleo-information available from the Tierra del Fuego mainland with information from Isla de los Estados. Focus was on two areas in the northern and north-western part of the island, Bahía Colnett and Bahia Crossley. Detailed geomorphologic and stratigraphic mapping of glacial deposits were combined with sampling sediments for OSL dating. To reconstruct the paleoclimatic development of Isla de los Estados since the last ice retreat, four main peat bog/lake sites were cored and sampled. In addition, living trees of Nothofagus and old logs preserved in the peat were sampled for dendrochronological and dendroclimatological studies. Preliminary results show that the deglaciation of the study area occurred before 16500 cal yr BP. Detailed multi- proxy analyses of the four sequences are under way and first results will be presented.

Björck, S.; Fernandez, M.; Hjort, C.; Ljung, K.; Martinez, O.; Möller, P.; Ponce, F.; Rabassa, J.; Roig, F.; Unkel, I.; Wohlfarth, B.

2007-05-01

12

Patrones de migración México-Estados Unidos en los noventa: Datos de cuatro encuestas mexicanas  

Microsoft Academic Search

Este artículo analiza los patrones de migración internacional de los mexicanos, con destino a Estados Unidos, en los noventa, a partir de los datos que arrojan cuatro encuestas mexicanas. Este artículo se insiere en una discusión reciente en la literatura de migraciones sobre los supuestos cambios estructurales del patrón migratorio procedente de México y con destino a los Estados Unidos.

Cristóbal Mendoza

13

La emigración española a Estados Unidos: una aproximación desde los microdatos censales de 1910  

Microsoft Academic Search

Este artículo tiene como objetivo principal explorar las características demográficas y el efecto de la desigual distribución de efectivos por sexos en las pautas matrimoniales de los inmigrantes y segunda generación de españoles en Ybor City (Tampa, Florida, Estados Unidos) a principios de siglo XX. Ybor City, además de proporcionarnos detalles de la poco estudiada emigración a Estados Unidos, es

Albert Esteve Palós; Àngels Torrents i Rosés; Clara Cortina Trilla

2007-01-01

14

Los Estados Unidos y la República de Chile se unen para combatir el cáncer  

Cancer.gov

Una nueva alianza entre el Instituto Nacional del Cáncer de los Estados Unidos y el Ministerio de Salud de la República de Chile, tiene el propósito de acelerar el avance contra el cáncer en la población hispana en los Estados Unidos y en América Latina.

15

Modelos estocásticos de aprendizaje en ensayos de respuesta dicotómica y un número finito de estados absorbentes  

Microsoft Academic Search

En este trabajo se construye un modelo probabilístico para representar un proceso de aprendizaje en el contexto de los modelos de estado en la denominada teoría matemática del aprendizaje. El modelo in- cluye tanto el proceso de adquisición como el de olvido, así como el supuesto de que el proceso pue - de terminar en uno cualquiera de r estados.

Carmen Santisteban Requena

2000-01-01

16

71 FR 33759 - Announcement of Availability of Funds for Cooperative Agreement to the Fundación México-Estados...  

Federal Register 2010, 2011, 2012, 2013

...oacute]n M[eacute]xico-Estados Unidos para la Ciencia, A.C. (FUMEC...oacute]n M[eacute]xico-Estados Unidos para la Ciencia, A. C. (FUMEC...oacute]n M[eacute]xico-Estados Unidos para la Ciencia, A. C....

2006-06-12

17

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

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

Luis Jorge Garay-Salamanca; Isaac de León-Beltrán; Eduardo Salcedo-Albarán

2010-01-01

18

La red exterior de Puertos del Estado: Información oceanográfica en tiempo real. Puertos del Estado deep water network: Oceanographic information in real time  

Microsoft Academic Search

SUMMARY In the last 20 years, Puertos del Estado has settled a complex marine monitoring system that allows the access to real time oceanographic and meteorological information. One of the networks in this system is the deep water network with buoys deployed at open sea. The access to this information is completely free through the web pages where users can

Marta Alfonso; José Damián López; Isabel Ruiz; Enrique Álvarez; Nuevas Tecnologías

19

Patrones alimenticios y valoración del estado nutricional en población adulta atendida en la Atención Primaria  

Microsoft Academic Search

INTRODUCCIÓN: Los patrones alimenticios influyen en la salud del momento y pueden determinarla a largo plazo.\\u000aOBJETIVOS: Identificar los hábitos alimenticios y el estado nutricional de la población entre 18 y 44 años de edad atendida en un centro de atención primaria y estudiar los factores asociados.\\u000aTIPO DE ESTUDIO: Transversal.\\u000aEMPLAZAMIENTO: Área básica urbana.\\u000aSUJETOS: Muestra aleatoria de 201

Matilde González Solanellas; Marta Puig Soler; Ana Romagosa Perez-Portabella; Clàudia Caselles Montagut; Montserrat Grau Carod; Hegoi Segurola Gurrutxaga; Santiago Lancho Lancho; Edurne Zabaleta del Olmo

2009-01-01

20

CÁLCULO DEL VOLUMEN ESPECÍFICO DE LÍQUIDOS PUROS CON ECUACIONES DE ESTADO CÚBICAS  

Microsoft Academic Search

RESUMEN. En este trabajo se presenta una revisión de los cambios que se han producido en los últimos años en las ecuaciones de estado cúbicas de más amplia aceptación y se hace un estudio comparativo del cálculo del volumen específico de once líquidos puros por medio de cinco ecuaciones cúbicas: Van der Waals, Redlich-Kwong, Soave-Redlich-Kwong, Peng-Robinson y Valderrama-Patel- Teja .

BIBIAN HOYOS

21

El número de supervivientes de cáncer en Estados Unidos asciende a aproximadamente 12 millones  

Cancer.gov

El número de supervivientes de cáncer en Estados Unidos ascendió a 11,7 millones en 2007, de acuerdo a un informe publicado por los Centros para el Control y la Prevención de Enfermedades, CDC, y el Instituto Nacional del Cáncer, NCI, el cual forma parte de los Institutos Nacionales de la Salud. Hubo 3 millones de supervivientes de cáncer en 1971 y 9,8 millones en 2001.

22

DESCRIPTIONS OF GENUS DOWNSIOMYIA VARGAS (DIPTERA: CULICIDAE: AEDINI) AND ITS TYPE SPECIES DO. NIVEA LUDLOW  

Technology Transfer Automated Retrieval System (TEKTRAN)

Genus Downsiomyia and its type species, Do. nivea (Ludlow), are described in detail. Thirty species included in the genus are listed. An extensive list of previous literature pertaining to the genus is provided with references cited....

23

HANSEN'S DISEASE AND REACTIONAL S TATES: PATIENT LIFE STORIES MAL DE H ANSEN Y ESTADO REACCIONAL: HISTÓRIA DE VIDA DE PERSONAS ACOMETIDAS  

Microsoft Academic Search

RESUMO: RESUMO: RESUMO: RESUMO: RESUMO: Trata-se de um estudo de natureza qualitativa com emprego do método de história de vida que objetivou descrever a interferência do estado reacional na história de vida das pessoas acometidas pela hanseníase. Foi realizada em 2006, numa unidade básica de saúde, no município do Rio de Janeiro. Foram entrevistados 13 clientes com estado reacional em

Miranda LF; Leão AMM; Kelly Cristina; Cateringer SangiI

24

Revisiting the Role Schoo l?Regents Played in the Educational Policy of Estado Novo (1930's-1950's)  

Microsoft Academic Search

Though approached in several texts about the organization of teaching activity during Estado Novo, the figure of the school ? regent has barely deserved specific treatment. It was not until recently that the first systematisation of quantitative data concerning their presence in the education system emerged, along with an attempt of analysis about the characteristics of this professional group, reaching

Paulo Guinote

25

AVALIAÇÃO DE PROCEDÊNCIAS E PROGÊNIES DE LIQUIDAMBAR DA AMÉRICA CENTRAL, DO MÉXICO E DOS ESTADOS UNIDOS, EM AGUDOS, BRASIL  

Microsoft Academic Search

Foi instalado um teste de procedência e progênie de Liquidambar styraciflua L. em Agudos, SP, em solo de areia quartzosa. Os materiais genéticos foram fornecidos pelo Oxford Forestry Institute, incluindo doze procedências da Guatemala, Honduras, Nicarágua, México e dos Estados Unidos, sendo testados juntamente com uma testemunha local, com duas a dez progênies por procedência. Medições efetuadas dos quatro até

Jarbas Y. Shimizu; Ivana H. Z. Spir

26

COMPARACIÓN DE VARIOS MÉTODOS PARA LA REPRESENTACIÓN CARTOGRÁFICA DE INFORMACIÓN CLIMÁTICA EN ZONAS ALTAS DEL ESTADO LARA  

Microsoft Academic Search

Se compararon tres métodos cartográficos diferentes para la representación de aspectos climáticos (temperatura y precipitación) en zonas altas del estado Lara. Se usó conjuntamente A) Representación analógica (en papel), B) Mapas digitalizados de coberturas mediante el software para Sistema de Información Geográfica (SIG) ArcInfo y C) Modelos numéricos interpolados mediante software de aplicación geoestadística (SURFER), empleando el modelo de interpolación

Jorge López Márquez; Rigoberto Andressen

2001-01-01

27

IDENTIFICACIÓN BACTERIOLÓGICA DE LAS INFECCIONES RESPIRATORIAS EN LOS BECERROS Y SU SUSCEPTIBILIDAD ANTIMICROBIANA EN DOS FINCAS DEL ESTADO GUÁRICO, VENEZUELA  

Microsoft Academic Search

Un total de 50 muestras de hisopados nasales de becerros. con enfermedad respiratoria procedentes de dos fincas ubicadas en el estado Guárico. fueron analizados por estudios bacteriológicos. Los agentes bacterianos más frecuentes fueron Pasteurella multocida (28%), Streptococcus spp. hemolíticos (22%), Klebsiella pneumoniae (18%), Corynebacterium spp. (14%), Staphylococcus epidermidis (6%), Bacillus spp. (4%), Escherichia coli y Pseudomonas aeruginosa (2%). respectivamente. Se

Yuraima Pineda; Salin Mora; Jorge Santander

28

El comercio de servicios de enseñanza en el el tratado de libre comercio (TLC) con los Estados Unidos de América. Las implicaciones para la educación superior en Colombia  

Microsoft Academic Search

Desde la perspectiva del comercio internacional la prestación de servicios, en particular la de servicios públicos, ha sido un tema reciente. En el caso de la educación este tema se consideraba tradicionalmente como una actividad propia del Estado, asociada al concepto de servicio público. En la actualidad estos conceptos han cambiado y hoy se considera que la educación no sólo

Hernán Jaramillo Salazar; Marcela Anzola Gil

2005-01-01

29

Estado nutricional em zinco e teste de acuidade do paladar em crianças de baixa estatura familiar Zinc nutritional status and taste acuity test in familial short stature children  

Microsoft Academic Search

Objetivos: Avaliar o estado nutricional em zinco e a percepção do paladar (salgado, doce, ácido e amargo) em crianças de baixa estatura familiar. Métodos: Estudo transversal de 30 crianças sem sinais de puberdade, pacientes do ambulatório de crescimento da Universidade Federal de São Paulo. A ingestão dietética foi avaliada pelo método do Registro Alimentar. Para o teste de acuidade do

Andréa G. Marques; Luiz A. Lopes; Olga M. S. Amancio

30

COMPETITIVIDADE, ESPECIALIZAÇÃO E VANTAGEM COMPARATIVA DO ESTADO DE MATO GROSSO NO MERCADO INTERNACIONAL: UM ESTUDO DE INDICADORES DE COMÉRCIO EXTERIOR NO PERÍODO 1996- 2007  

Microsoft Academic Search

Este artigo identifica os grupos de produtos do estado de Mato Grosso que exibem vantagens competitivas no comércio exterior durante o período 1996-2007. Para tanto, com base em dados da Secretaria de Comércio Exterior do Ministério da Indústria e Comércio, estimam-se indicadores de Comércio Exterior, tais como VCR (Vantagens Comparativas Reveladas), ICSC (Índice de Contribuição ao Saldo da Balança Comercial)

Paula Luciana Silva; Benedito Dias Pereira; Alexandre Magno Faria; Gerson Rodrigues Silva; Arturo Zavala Zavala

2008-01-01

31

The Prince, the Captain and "The State": An Examination of the Mesquita Family Ownership of "O Estado de Sao Paulo" to 1969.  

ERIC Educational Resources Information Center

|Julio Mesquita joined the staff of "O Estado de Sao Paulo" in 1885 and became a director in 1891, when he also began his first term as a deputy of the Sao Paulo state assembly. Until his death in 1927, Mesquita guided the newspaper's growth in all respects--editorial, political, technological, and economic. Julio de Mesquita Filho assumed…

Etsinger, Jean

32

Petrogenesis of fertile mantle peridotites from the Monte del Estado massif (southwest Puerto Rico): a preserved section of Proto-Caribbean oceanic lithospheric mantle?  

NASA Astrophysics Data System (ADS)

The Monte del Estado massif is the largest and northernmost serpentinized peridotite belt in southwest Puerto Rico. It is mainly composed of spinel lherzolite and minor harzburgite with variable clinopyroxene modal abundances. Mineral and whole rock major and trace element compositions of peridotites coincide with those of fertile abyssal peridotites from mid ocean ridges. Peridotites lost 2-14 wt% of relative MgO and variable amounts of CaO by serpentinization and seafloor weathering. HREE contents in whole rock indicate that the Monte del Estado peridotites are residues after low to moderate degrees (2-15%) of fractional partial melting in the spinel stability field. However, very low LREE/HREE and MREE/HREE in clinopyroxene cannot be explained by melting models of a spinel lherzolite source and support that the Monte del Estado peridotites experienced initial low fractional melting degrees (~ 4%) in the garnet stability field. The relative enrichment of LREE in whole rock is not due to secondary processes but probably reflects the capture of percolating melt fractions along grain boundaries or as microinclusions in minerals, or the presence of exotic micro-phases in the mineral assemblage. We propose that the Monte del Estado peridotite belt represents a section of ancient Proto-Caribbean (Atlantic) lithospheric mantle originated by seafloor spreading between North and South America in the Late Jurassic-Early Cretaceous. This portion of oceanic lithospheric mantle was subsequently trapped in the forearc region of the Greater Antilles paleo-island arc generated by the northward subduction of the Caribbean plate beneath the Proto-Caribbean ocean. Finally, the Monte del Estado peridotites belt was emplaced in the Early Cretaceous probably as result of the change in subduction polarity of the Greater Antilles paleo-island arc without having been significantly modified by subduction processes.

Marchesi, Claudio; Jolly, Wayne T.; Lewis, John F.; Garrido, Carlos J.; Proenza, Joaquín. A.; Lidiak, Edward G.

2010-05-01

33

PRODUÇÃO E COMERCIALIZAÇÃO DA CASTANHA DO BRASIL (BERTHOLLETIA EXCELSA, H.B.K) NO ESTADO DO ACRE BRASIL, 1998-2006  

Microsoft Academic Search

A castanha do brasil (Bertholletia excelsa, H.B.K.), é uma planta nativa da Amazônia, sendo uma das mais importantes espécies de exploração extrativista. Suas amêndoas apresentam alto valor econômico, tornando-se uma das principais atividades econômicas na região amazônica. O presente estudo teve como objetivo fazer um levantamento da produção e comercialização da castanha-do-brasil no Estado do Acre, n o período de

Lilliane Martins; Zenobio Perelli Gouveia E Silva; Breno Carrillo Silveira

2008-01-01

34

Estudio de la fotoabsorción y fotoionización de la molécula de alta relevancia atmosférica no a través de los estados Rydberg con la metodología MQDO  

NASA Astrophysics Data System (ADS)

Los procesos de fotoionización son de una importancia fundamental [1] y encuentran aplicación en un gran número de contextos científicos: Astrofísica [2], química de las radiaciones, biología. Los investigadores de dichos campos, necesitan de valores de fiables de secciones eficaces para la fotoionización parcial, la Fotoabsorción, así como para los procesos de fotofragmentación en amplios intervalos espectrales, particularmente en estudios de modelización [3-5]. En este trabajo se ha centrado la atención sobre el oxido nítrico, que se ha considerado apropiado y relevante por varios motivos: por el trascendental papel que representa en la física y química de la alta atmosfera [6], aparte de por estar íntimamente relacionado con los problemas de contaminación. Los procesos de recombinación disociativa [7] del NO, donde los estados Rydberg se encuentran directamente implicados, son relevantes, por ejemplo, en las regiones E y F de la ionosfera [7]. En este trabajo se estudia la fotoionización del NO desde el estado fundamental con la versión molecular del método del orbital de defecto cuántico (MQDO). Para ello se calcula el diferencial de las fuerzas de oscilador parciales que constituyen los canales de fotoionización del NO desde el estado fundamental. La continuidad del diferencial de fuerza de oscilador calculada a través del umbral de fotoionización, esto es, en las regiones del espectro discreta y del continua, se adopta como criterio de calidad la escasez de datos comparativos [8].

Bustos, E.; Velasco, A. M.; Martín, I.; Lavín, C.

35

Records of environmental changes during the Holocene from Isla de los Estados (54.4°S), southeastern Tierra del Fuego  

NASA Astrophysics Data System (ADS)

Southernmost Patagonia, located at the relatively narrow passage between Antarctica and South America, is a highly sensitive region for recording meridional and zonal changes in the pattern of oceanic and atmospheric circulation. The island of Isla de los Estados, situated at 54.5°S, 64°W, east of Argentinean Tierra del Fuego, provides an exceptional possibility, to investigate terrestrial records of atmospheric conditions in an oceanic setting during the last deglaciation and the Holocene. Here we present geochemical and diatom analyses from 10 600 to c. 1500 cal BP of one sequence (LGB) with peat, lake sediments and lagoon deposits at the northern coast of the island, and a lake sediment sequence (CAS) 3 km further inland. The data comprise TC, TN, loss on ignition analyses and continuous XRF scanning as well as age-depth modeling based on AMS- 14C dating on both cores. Diatom analysis of the CAS record complements the geochemical proxies. During the Holocene, our two sites have been impacted by two different forcings: changes in the regional climate regime largely influenced by the varying strength and position of the Southern Hemisphere Westerlies (SHW), while relative sea-level changes affected the deposits of the coastal site. In concert with the onset of the Antarctic thermal optimum, our data suggest fairly warm conditions and the establishment of denser peat and forest vegetation on the island c. 10 600 cal BP. Between 8500 and 4500 cal BP geochemistry and diatoms from the CAS record indicate stronger Westerlies at this latitude, which means higher wind speed or higher storm frequency and more precipitation, resulting in more pronounced surface run-off. After 4500 cal BP, the geochemical proxies and large changes in diatom assemblages indicate a decrease in precipitation, weaker winds and possibly cooler conditions, probably as an effect of weaker SHW and/or a latitudinal shift. The depositional environment of CAS changed from gyttja to peat around 1000 cal BP. At LGB, the onset of gyttja sedimentation around 7900 cal BP shows that the former wet land with peat accumulation had become a lake with a fairly rapid sedimentation. The chemical data from LGB imply a gradually increasing marine influence, probably as an effect of both rising sea level and increased impact of storms and maximum high tides. After a marine high-stand during the mid-Holocene, the LGB site returned into a peat bog again around 3400 cal BP. Our data suggest that since then relative sea level first dropped back below present sea level followed by a rise to present day sea level.

Unkel, Ingmar; Fernandez, Marilen; Björck, Svante; Ljung, Karl; Wohlfarth, Barbara

2010-12-01

36

A EFICIÊNCIA DOS PROGRAMAS EDUCATIVOS IMPLEMENTADOS POR EMPRESAS E ORGÃOS GOVERNAMENTAIS COMO FORMA DE PREVENÇÃO AO IMPACTO AMBIENTAL CAUSADO PELO DESCARTE INCORRETO DAS EMBALAGENS DE AGROTÓXICOS EM CAMPOS GERAIS NO SUL DO ESTADO DE MINAS GERAIS  

Microsoft Academic Search

Este estudo atua com uma ferramenta de feedback quanto aos resultados obtidos com os programas educacionais em combate ao descarte incorreto de embalagens vazias no município de Campos Gerais no Sul do Estado de Minas Gerais. Os objetivos são mensurar a eficiência dos -programas educativos implementados por empresas e órgãos governamentais como forma de prevenção ao impacto ambiental causado pelo

Jairo Gustavo De Lima; Marcelo Marcio Romaniello; Cristhiane Oliveira Da Graca Amancio

2008-01-01

37

HIPERTENSÃO OCULAR E OPACIDADES CRISTALINIANAS SUBCAPSULARES ASSOCIADA AO TRATAMENTO DO ESTADO REACIONAL HANSÊNICO COM CORTICOTERAPIA ORAL Ocular hypertension and cataract related to the treatment of the reactional states in Hansen's disease with oral prednisone  

Microsoft Academic Search

RESUMO O objetivo deste trabalho foi determinar a freqüência de hipertensão ocular e de catarata em portadores de hanseníase em tratamento de estado reacional dos tipos I e II, associado ou não à neurite, com corticoterapia oral. A partir daí, selecionar, orientar e encaminhar os pacientes que apresentaram complicações oculares para propedêutica e tratamento oftalmológico adequados. Foi elaborado estudo descritivo

Monica Jeha Maakaroun; N. B. Vilela de Castro; Arthur Jeha; Maakaroun Vilela de Castro

38

Comparative anatomy of the female genitalia of generic-level taxa in tribe Aedini (Diptera: Culicidae). Part XXII. Genus Downsiomyia Vargas  

Technology Transfer Automated Retrieval System (TEKTRAN)

A comparative, morphological analysis of the female genitalia of the genus Downsiomyia was conducted. The female genitalia of the genus are characterized and a comparison with other taxa is provided. Downsiomyia is divided into two groups. The type species of the genus, Do. nivea (Ludlow), is ill...

39

El Estado de los Ecosistemas  

NSDL National Science Digital Library

The recent Millennium Ecosystem Assessment has illustrated that human actions have significantly transformed many of Earths ecosystems. The main findings describe how: humans changed ecosystems dramatically over the past 50 years, changes to ecosystem services may get worse in the next 50 years, global action at all levels can reverse the degradation, and how ecosystem degradation increases risks of sudden changes and reduces benefits for future generations.

ChristiÃÂán Samper (National Museum of Natural History of the Smithsonian Institution;)

2005-08-01

40

Multi-proxy analyses of a peat bog on Isla de los Estados, easternmost Tierra del Fuego: a unique record of the variable Southern Hemisphere Westerlies since the last deglaciation  

NASA Astrophysics Data System (ADS)

We have analyzed an almost 14,000 year old peat sequence on the island of Isla de los Estados (55° S, 64° W), east of Tierra del Fuego, in the core of the Southern Hemisphere Westerlies. A multitude of methods have been used: high resolution 14C dating; detailed lithologic descriptions including humification degree; loss on ignition; magnetic susceptibility; bulk density; pollen and spore analysis and determination of Aeolian sand influx. By combining proxies for wind and precipitation we have been able to reconstruct how the westerlies have varied over time in the Atlantic sector of the Southern Ocean. It shows that this westerly wind belt was most intense at the onset of the record, 13,600-13,200 cal BP, coinciding with the mid to late part of the Antarctic Cold Reversal, followed by a gradual decline. At 12,200 cal BP the westerlies seem to have shifted to a position south of Tierra del Fuego and this phase, the calmest and driest period on the island throughout the sequence, ended at 10,000 cal BP when the westerlies moved equatorward again. Since then the westerlies have been present but with a variable impact on the 55° S latitude of the Atlantic. Mostly conditions have been fairly similar to today, but occasionally with a wider or narrower and/or weaker or stronger wind belt. At 7200 cal BP wind intensity began to increase and between 4500 and 3500 cal BP these southern latitudes experienced a distinct wind and precipitation maximum, both in terms of perseverance and intensity. Our results show a both wide and strong wind belt, with possible niveo-aeolian activity in Tierra del Fuego in winter, and possibly creating milder summers around the Antarctic Peninsula. In the later part of the Holocene, expansion-contraction phases of the wind belt, especially in winter, seem to have been a common phenomenon.

Björck, Svante; Rundgren, Mats; Ljung, Karl; Unkel, Ingmar; Wallin, Åsa

2012-05-01

41

Las Fuerzas Armadas y el Estado  

Microsoft Academic Search

La Argentina, como Nación, en el nuevo contexto internacional, de libre comercio y de interdependencia económica, no tiene aún una visión homogénea de su pasado. Cada corriente ideológica como así también cada grupo de interés, se inclina, inevitablemente, por aquellas personas o sucesos que sean afines con sus pensamientos, haciendo un análisis subjetivo del pasado para dar validez a su

Claudio Cuello

42

TAXONOMIA ZOOLÓGICA NO BRASIL: ESTADO DA ARTE  

Microsoft Academic Search

Brazil is a megadiverse developing country and the knowledge on the current situation of Brazilian taxonomy is a necessary step to establish future policies to deal with biodiversity. Certainly, the most important issue for the understanding of biodiversity is the installing capacity of taxonomists. In fact, little is known concerning the number of taxonomists, scientific production, and the problems faced

ANTONIO CARLOS MARQUES; CARLOS JOSÉ

43

Sobre el estado evolutivo de ? Pictoris  

NASA Astrophysics Data System (ADS)

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.

Brunini, A.; Benvenuto, O. G.

44

Electrodynamics of the Maxwell-Lorentz type in the ten-dimensional space of the testing of special relativity: A case for Finsler type connections  

Microsoft Academic Search

It has recently been shown by Vargas, (4) that the passive coordinate transformations that enter the Robertson test theory of special relativity have to be considered as coordinate transformations in a seven-dimensional space with degenerate metric. It has also been shown by Vargas that the corresponding active coordinate transformations are not equal in general to the passive ones and that

Jose G. Vargas; Douglas G. Torr

1989-01-01

45

Correlación entre la corriente interlobular inducida y estados de depresión  

Microsoft Academic Search

A non-invasive technique known as transcranial magnetic stimulation (TMS), that uses electromagnetic fields to induce electric currents in the brain, that could alter brain activity, is being applied since 1985. Initially, such technique (TMS) was used in a diagnostic procedure to dimension excitability and connectivity of nervous tissue, and to map brain functions, but due to its capacity of modulating

Antonino Caralli D'Ambrosio; Cesar Seijas; Sergio Villazana; Francisco Arteaga; Andreau Lenox

46

La FDA investiga Brote de Hepatitis A en varios estados ...  

Center for Food Safety and Applied Nutrition (CFSAN)

... FDA, los Centros para el Control y la Prevención de Enfermedades (CDC) y de las autoridades de salud locales y estatales acerca de un brote de ... More results from www.fda.gov/food/recallsoutbreaksemergencies/outbreaks

47

Múltiples estados de desorden en el etanol sólido  

NASA Astrophysics Data System (ADS)

El diagrama de fases del etanol por debajo de los 169 K será presentado. Se mostrará que el etanol puede solidificarse en tres fases con diversos niveles de desorden,(como un vidrio(G), como un vidrio orientacional (OG) y como un cristal de fase rotora (RP)) además de en una fase totalmente cristalina. Las estructuras de estas tres fases serán presentadas tal y como se deducen a partir de diversas medidas de difracción de neutrones al igual que las proporciones de los isómeros de dicho material en las fases desordenadas y se compararán con los resultados de la fase cristalina y del líquido superenfriado. Igualmente diversas medidas sobre su dinámica serán presentadas, tanto de dispersión de neutrones, como de capacidad calorífica y de medidas dieléctricas y comparadas con modelos teóricos y simulaciones para tratar de explicar los procesos de relajación observados y las transiciones entre las diversas fases.

Fernández-Perea, R.

48

Comercio justo, Estado y sociedad civil. Una aproximación crítica  

Microsoft Academic Search

In this paper, we propose to analyze the case of a textile productive chain, framed in fair trade, it takes place in the town of Capilla del Monte, Cordoba, Argentina. This iniciative brings together a large number of workers in the context of domestic and handmade work processes. Under the guidelines of local economic development, the textile productive chain was

Susana R. Presta

2009-01-01

49

Contaminación del aire en Santiago: Estado actual y soluciones  

Microsoft Academic Search

En el presente trabajo se discute el problema de la contaminación atmosférica en Santiago y de los esfuerzos en marcha para su solución, representados formalmente por el Plan de Prevención y Descontaminación de la Región Metropolitana (PPDA). A modo de introducción se definen términos y conceptos utilizados en el PPDA, los cuales son de uso frecuente en el área de

Raúl ORyan; Luis Larraguibel

2000-01-01

50

ACRIDOIDEOS (INSECTA: ORTHOPTERA) DEL ESTADO DE GUANAJUATO, MÉXICO  

Microsoft Academic Search

Thirty eight species were determined in 28 genera of the superfamily Acridoidea in the state of Guanajuato. Gomphocerinae belonging to Acrididae, showed the greatest number of genera and species with 11 and 14 respectively; next came Oedipodinae, with six genera and eigth species, and finally Melanoplinae with three genera and four species. Melanoplus differentilis was the most abundant species, constituting

Manuel Darío SALAS-ARAIZA; Eduardo SALAZAR-SOLIS; Genaro MONTESINOS-SILVA

51

Estado e Economia no Institucionalismo de Douglass North  

Microsoft Academic Search

Douglass North's ideas, notwithstanding his 1993's Nobel award are still barely known among Brazilian economists. This unawareness is deplorable not only because the relevance of his ideas to current development theory but also for his new (and rather heterodox) contribution to the analysis of the modern State's economic role. This paper presents a synthesis of North's discussion concerning the institutional

RONALDO FIANI

52

Servicio de Salud Pública de los Estados Unidos  

Center for Food Safety and Applied Nutrition (CFSAN)

Text Version... “Escherichia coli enterohemorrágica” (EHEC, por sus siglas en ingles) es la E. coli que causa la colitis hemorrágica, es decir, hemorragia intestinal. ... More results from www.fda.gov/downloads/food/guidanceregulation

53

La Economía y la Reinvención del Estado Mexicano  

Microsoft Academic Search

For the last few years, the importance of the role of the state in formulating and implementing economic policies to achieve growth and development of society, broadly speaking, both state and society have undergone a lot of changes and transformations. In Mexico, the so called neoliberal model of state has been impossed over a former protectionist, statist and populist regimes

José G. Vargas

54

Hacia una teoría sistémica del 'Estado parasitario': El caso Argentino  

Microsoft Academic Search

Argentina has more than twice the total debt of India whilst the latter has twenty-eight times more population in roughly equivalent territories. It was once a prosperous haven for poor Europeans, with one of the highest per capita incomes in the world, but now half its population is underneath the poverty line. It has perpetrated the greatest default in world

Carlos Escudé

2004-01-01

55

Histórias infantis: um recurso para a compreensão dos estados mentais  

Microsoft Academic Search

Children's storybooks: a resource to the understanding of mental states. This study examined a sample of 100 national children's storybooks directed to pre-school children aged four to six years to identify words\\/ utterances that denote mental states according to three views of analysis: via words and expressions in the text; via the pictures; and via presence of irony or false

Marisa Cosenza Rodrigues; Jacqueline Silva Rubac

2008-01-01

56

Electrodynamics of the Maxwell-Lorentz type in the ten-dimensional space of the testing of special relativity: A case for Finsler type connections  

Microsoft Academic Search

It has recently been shown by Vargas,\\u000a(4)\\u000a that the passive coordinate transformations that enter the Robertson test theory of special relativity have to be considered as coordinate transformations in a seven-dimensional space with degenerate metric. It has also been shown by Vargas that the corresponding active coordinate transformations are not equal in general to the passive ones and that

Jose G. Vargas; Douglas G. Torr

1989-01-01

57

Literary Reviews  

Microsoft Academic Search

Searching for truth. Who Killed Palomino Molero?. Mario Vargas Llosa. Translated from the Spanish by Alfred MacAdam. London: Faber & Faber. 1988. 151pp. £9.95 hbThe Perpetual Orgy. Mario Vargas Llosa. Translated from the Spanish by Helen Lane. London: Faber & Faber. 1987. 240pp. £9.95 hbMetamorphoses. Men of Maize. Miguel Angel Asturias. Translated from the Spanish by Gerald Martin. London\\/New York:

Jason Wilson; William Rowe; Norman Thomas Di Giovanni; Clare Ferros; Angela Smith; Aamer Hussain; A Reza Navabpour; Gerald Martin

1988-01-01

58

2020 Focus briefs on the world's poor and hungry people  

Microsoft Academic Search

Contents: 1.The Changing Profile of Poverty in the World\\/Shaohua Chen and Martin Ravallion. 2.Characteristics and Causes of Severe Poverty and Hunger\\/Akhter U. Ahmed, Ruth Vargas Hill, Lisa C. Smith, and Tim Frankenberger. 3.The Poorest and Hungry: Looking Below the Line\\/Akhter U. Ahmed, Ruth Vargas Hill, and Doris M. Wiesmann. 4.Mapping Where the Poor Live\\/Todd Benson, Michael Epprecht, and Nicholas Minot

2007-01-01

59

Reply to ``Comment on `Two-dimensional charged-exciton complexes' ''  

NASA Astrophysics Data System (ADS)

We respond to criticisms raised by K. Varga [Phys. Rev. B 57, 13 305 (1998)] and reaffirm that the results in our original paper obtained using a two-body analytical method remains valid within the framework of an effective excitonic composite model. The conceptual model of the excitonic systems as well as the numerical method based on variational functions utilized by Varga differ significantly from ours. Hence comparison of binding energies of the charged biexciton remains questionable. In this reply, we discuss the shortcomings of modeling the charged biexciton as a five-body system and treating excitonic complexes as atomic systems, as done in Varga's Comment. We also clarify the somewhat misleading statement that the ``charged-biexciton complex is stable for any value of the mass ratio'' in our original paper and derive a simple criterion for the existence of a single bound charged-biexciton state.

Thilagam, A.

1998-05-01

60

Time dependent transport in nanostructures  

NASA Astrophysics Data System (ADS)

Using the Lagrange-function representation [1] we present time-dependent density functional calculations of the transport properties of nanostructures. To avoid the complications related to the semiinfinite leads a complex absorbing potential (CAP) is added to the Hamiltonian [2,3]. This transformation leads to an effectively closed system which is computationally manageable. We will compare the results of the time dependent approach to those of time independent approaches for prototypical molecular devices such as benzene ring between gold electrodes and nanotubes.[4pt] [1] K. Varga, Z. Zhang, S.T. Pantelides, Phys. Rev. Lett. 93, 176403 (2004).[0pt] [2] K. Varga, S.T. Pantelides, Phys. Rev. Lett. 98, 076804 (2007).[0pt] [3] J. A. Driscoll, K. Varga, Phys. Rev. B.

Varga, Kalman

2009-03-01

61

Lenguaje, nación y Estado: pasado y presente Language, Nation, and State: Past and Present  

Microsoft Academic Search

The three elements: language, nation and state have been interrelated. Three types of interrelations can be distinguished: 1) language-nation- state, 2) nation-language and state, 3) state-nation and language. These types have been active especially in Europe since the 19 th century, and in countries and regions following European example, including present cases of nationalism and ethno-regionalism. In recent decades language

ROMAN SZUL

62

CONTROL QUÍMICO DE MALEZAS EN FRIJOL (Phaseolus vulgaris L.) EN EL ESTADO DE VERACRUZ 1  

Microsoft Academic Search

Chemical weed control in dry beans (Phaseolus vulgaris L.) in the state of Veracruz México. Two experi- ments wiht herbicides were carried out during the Fall-Winter seasons of 1990-91 and 1991-92. The objective was to determi- ne the best preemergence and\\/or postemergence herbicide treatments for controlling the dominant weed species in the residual moisture growing sistem of beans. The experiments

Valentín A. Esquivel; Octavio Cano; Ernesto López

63

El comercio de los productos transgénicos: el estado del debate internacional  

Microsoft Academic Search

Los productos transgénicos mezclan aspectos contradictorios. La manipulación genética de cultivos permite desarrollar tanto productos con toxinas insecticidas, disminuyendo el uso de defensivos agrícolas que pueden dañar el medio ambiente, como alimentos con propiedades vitamínicas y proteicas, que pueden mejorar los indicadores sociales en los países en desa- rrollo. Por otra parte, se han abierto interrogantes acerca de los posibles

María Angélica Larach; División de Comercio Internacional

64

Radioinmunoterapia en los linfomas no Hodgkin: desarrollo histórico y estado actual  

Microsoft Academic Search

Radioimmunotherapy treatment for lymphoma is a novel targeted therapeutic approach. Several years of development of radioimmunotherapeutic compounds came to fruition in February of 2002 when 90Y-ibritumomab tiuxetan (Zevalin (™), Y2B8) was approved in the USA and later in Europe, for the treatment of relapsed or refractory, low grade or transformed B-cell lymphoma in the USA. 90Y-ibritumomab tiuxetan utilizes a monoclonal

C. Emmanouilides

2006-01-01

65

AVALIAÇÃO DA EFICÁCIA DE PROGRAMA DE FORMAÇÃO DE EMPREENDEDORES E LIDERANÇAS RURAIS NO ESTADO DO PARANÁ  

Microsoft Academic Search

Este artigo apresenta os resultados de avaliações da eficácia do Programa Empreendedor Rural – PER – em alcançar seus objetivos. O PER é um programa de educação rural para produtores e trabalhadores rurais desenvolvido no Paraná e executado pelo Senar\\/PR e Sebrae\\/PR que visa elevar os estoques de capital humano e social no meio rural. O programa adota o construtivismo

Vania Di Addario Guimaraes; Fernando Curi Peres; Luis Alberto Ambrosio; Jose Roberto Fernandes Canziani

2008-01-01

66

Prevalencia de caries y estado periodontal de los niños y adolescentes de Navarra (2002)  

Microsoft Academic Search

Background. Surveys of caries prevalence and dental treatment have been conducted in Navarra since 1987, before PADI was implemented (1991). Objectives: Investigate the dental and perio- dontal health status of children and adolescents of Navarra in 2002. Methods: Epidemiological survey of a representative sample (n 1,566) of 1º,3º,6º EP and 2º ESO schoolchildren. Clinical examinations were conducted by calibrated examiners

Ángel Doria-Bajo; Cortés Martinicorena; Francisco Javier

67

One Language for the United States? (Un Idioma para Los Estados Unidos?) CSG Backgrounder.  

ERIC Educational Resources Information Center

The United States has become increasingly multilingual in recent decades, and while English is the most commonly spoken language, almost 11 percent of Americans prefer to speak another language at home. Bilingualism is promoted by governmental units at the federal, state, and local levels through a variety of programs, particularly in education…

Ford, Mark L.

68

Conductas purgativas y estado nutricional en anorexia nerviosa y bulimia nerviosa  

Microsoft Academic Search

Aims: The aim of the study was to investigate whether the use of purgative methods in patients with eating di- sorders (anorexia nervosa (AN) and bulimia nervosa (BN)) could be capable of producing changes in the nu- tritional status of the patients. Setting and Patients: The group under study was com- posed of 184 female eating disordered outpatients. One hundred

F. J. Vaz; A. García-Herráiz; B. López-Vinuesa; M. Monge; A. Fernández-Gil; J. A. Guisado

69

ESTRUCTURA PRODUCTIVA Y DESEQUILIBRIO EXTERNO EN CARNE DE VACUNO ENTRE MÉXICO Y ESTADOS UNIDOS  

Microsoft Academic Search

The problem to investigate is the permanent disequilibrium of Mexican commercial balance of cattle heads and meat regarding United States during the period 1993-2007. The objective is shows that the inequality productive structure on cattle heads and meat that exists between Mexico and American Union, through commercial exchange of those products impact the commercial balance. The methodology used was the

Luis Alberto Araujo Andrade; Eraclio del Jesus Cruz Pacheco

2010-01-01

70

EMBARCAÇÕES, ARTES E PROCEDIMENTOS DA PESCA ARTESANAL NO LITORAL SUL DO ESTADO DO PARANÁ, BRASIL  

Microsoft Academic Search

Boats, gears and procedures of the artisanal fishing at the southern coast of Paraná state, Brazil This work describes boats and gears employed by artisanal fishermen of the Southern Paraná coast, Brazil, and analyses the fishing procedures performed at the shallow continental shelf. Seven types of boats and 7 main types of gears were identified. Differences between the fisherman communities

PAULO DE TARSO CHAVES; MAURÍCIO DE CASTRO ROBERT

71

Monitoramento de radioatividade ambiental no estado de Sao Paulo. (Environmental radiation monitoring in Sao Paulo state).  

National Technical Information Service (NTIS)

The results of environmental radiation monitoring that CETESB (Technological Company of Environmental Sanitation of Sao Paulo) does in influence areas of radioactive materials store of Nuclemon Minero-Quimica S.A. in the municipality of Itu, Sao Paulo Sta...

E. G. Agudo A. M. Albuquerque N. V. Vasconcellos

1991-01-01

72

Características asociadas al subregistro de muerte en niños del estado de Guerrero, México  

Microsoft Academic Search

Objective. To estimate the frequency of underregis- tered children deaths in rural areas and to identify associ- ated characteristics. Material and methods. The study was conducted in three stages. In the first, three strata of communities were formed according to the number of in- habitants; then a representative number of villages was ran- domly selected from each stratum. A census

PATRICIA TOMÉ; HORTENSIA REYES; CÉSAR PIÑA; LETICIA RODRÍGUEZ; GONZALO GUTIÉRREZ

1997-01-01

73

Inconsistencias en la seguridad nacional de Vicente Fox y la relacion con Estados Unidos  

Microsoft Academic Search

The central argument of this dissertation is to examine how the political regime which emerged from the Mexican Revolution confused its own security with the security of the Nation-State between 1928 and the year 2000. Nevertheless, that was the type of relationship supported by Washington because it helped to preserve its own interests of stability and security in its Southern

Abelardo Rodriguez Sumano

2007-01-01

74

¿Quién habla en la oreja de Einstein? Arte indígena contemporáneo en el estado de Chiapas (México)  

Microsoft Academic Search

This article analyzes the current artistic production of the indigenous peoples of Chiapas, combining a sociological focus and an aesthetic perspective. The Zapatista uprising of 1994, transformed the urbanistic structure and social fabric of San Cristóbal de Las Casas in such a way that, today, the idealized indigenous world for tourism does not compare to the real indigenous world of

Luca D'Ascia

75

Economía Urbana y Calidad de Vida. Una revisión del estado del conocimiento en España  

Microsoft Academic Search

Quality of life is increasingly becoming a concept researched empirically and theoretically in the field of economics. In urban economics in particular, this increasing interest stems mainly from the fact that quality of life affects urban competitiveness and urban growth, research shows that when households and businesses decide where to locate, quality of life considerations can play a very important

Vicente Royuela; Diona Lambiri; Bianca Biagi

2006-01-01

76

AVALIAÇÃO DE ESPÉCIES FLORESTAIS EM ÁREA DE MATA NO ESTADO DE RORAIMA  

Microsoft Academic Search

This study was carried out to evaluate 19 native and exotic species and to identify potential species for plantation in homogeneous stands and in agroforestry systems in forest ecosystem in Roraima State. The species were planted from 1997 to 2000. When the objective was sawn wood production the spacing was 4 x 3 m and when the objective was energy

Helio Tonini; Marcelo Francia Arco-Verde; Dalton Schwengber; Moises Mourão Junior

2006-01-01

77

HAMMONDIA HEYDORNI, NEOSPORA CANINUM E TOXOPLASMA GONDII EM CAPRINOS ABATIDOS NO ESTADO DA BAHIA, BRASIL  

Microsoft Academic Search

Resumo Hammondia heydorni, Neospora caninum e Toxoplasma gondii são protozoários coccídios que parasitam diferentes espécies animais domésticas e silvestres. E nquanto a infecção por H. heydorni parece ser assintomática, N. caninum e T. gondii podem provocar alterações reprodutivas em ruminantes. N. caninum é um importante causador de abortamentos em bovinos, ao passo que T. gondii induz a abortamentos em caprinos

R. S. UZÊDA; K. ABE-SANDES; L. F. P. GONDIM

78

REDISTRIBUCIÓN DEL ESTADO TENSIONAL EN ALAMBRES DE ACERO DE ALTA RESISTENCIA  

Microsoft Academic Search

This paper analyzes the evolution of the residual stresses in high strength steel wires when diverse fatigue loadings are applied. According to the obtained results, a stress redistribution at surface is observed, it being more accused in the cases where the maximum loading exceeds the yield strength. This effect on the stress state could be relevant in the analysis of

M. Lorenzo; D. Vergara; V. Kharin; J. Toribio

79

Evaluación del estado de salud con la Encuesta SF36: resultados preliminares en México  

Microsoft Academic Search

Objective. To establish a multidimensional profile of the health status in a population of southeastern Mexico and analyze the psychometric properties of a translation of the SF-36 survey authorized by the International Quality of Life Assessment Project. Material and methods. The SF-36 was administered to 257 volunteers of a clinic and a con- trol group in a governmental institution. The

Miguel A. Zúniga; Genny T. Carrillo-Jiménez; Peter J. Fos; Barbara Gandek; Manuel R. Medina-Moreno

1999-01-01

80

RESCATE Y RETORNO A ESTADO SALVAJE DE UN OSO PARDO EN ASTURIAS (ESPAÑA)  

Microsoft Academic Search

Una hembra de oso pardo (Ursus arctos, L.), localizada junto a una carretera el 28 de marzo de 1999 con dificultades motrices y que no mostraba el comportamiento habitual de huida, fue capturada y dotada de un transmisor. Tras una inspección sobre el terreno, en la que sus ritmos respiratorios y cardiacos y su temperatura corporal resultaron normales, se le

J. NAVES; A. FERNÁNDEZ-GIL; M. RUIZ-BASCARÁN; J. F. GARCÍA-GAONA; J. C. DEL CAMPO; Y M. DELIBES

2001-01-01

81

A GESTÃO DO CONHECIMENTO E A INOVAÇÃO: ABORDAGENS DO ATUAL ESTADO DA ARTE  

Microsoft Academic Search

The world and the current society live a moment of deep transformations. Concepts are appearing and being adapted. The Knowledge Management appears as alternative in the managerial ambit. Information Technology, allied to new products and concepts it is generating innovation in the companies management. The organizations to each generation, year, event suffers changes that are worsened by the economical recession

Fábio Câmara; Araújo de Carvalho; M. Eng; João Ernesto Escosteguy Castro; Aline França de Abreu

82

Níveis de organoclorados em queijos produzidos no Estado do Rio Grande do Sul  

Microsoft Academic Search

Organochlorine compounds are pesticides used in agriculture, for the control of biological vectors of diseases and of livestock ectoparasites. Their use in Brazil is now prohibited, except for control of biological vectors in epidemics. However, residues of such compounds can still be found in the environment and in foodstuffs. For this reason, the presence of organochlorine compounds in cheese produced

Joice Sifuentes dos Santos; Ana Augusta Odorissi Xavier; Edi Franciele Ries; Ijoni Hilda Costabeber; Tatiana Emanuelli

2006-01-01

83

From Chavela to Frida: loving from the margins.  

PubMed

This article analyzes the portrayal of lesbian desire in the case of two of the most renowned icons of contemporary Mexican and Latino popular culture: singer Chavela Vargas (1919-2012) and painter Frida Kahlo (1910-1954). This article explores the intertextual dialogue between two texts that deal with the construction of Kahlo's persona and sexuality: Chavela's memoir, titled Y si quieres saber de mi pasado (2002), and the film Frida (2001), directed by Julie Taymor. Fundamental to this study is Chavela Vargas' lesbian subject position in both texts and the consequences and implications her location has in representing lesbian homoerotics and desire. PMID:22966995

Ruiz-Alfaro, Sofía

2012-01-01

84

Development Communication Report, Winter 1985, No. 48.  

ERIC Educational Resources Information Center

|This newsletter discusses development projects in developing nations, including the Dominican Republic, Ecuador, and Peru. The following major articles are included: (1) "Radio Santa Maria: A Case Study of Participatory Evaluation" (John K. Mayo, Charles B. Green, and Miguel E. Vargas); (2) "Instruction by Audio Conference: An Alaskan Example"…

Development Communication Report, 1985

1985-01-01

85

Perspectivas Pedagogicas. Documentos-Ponencias Y Ensayos Proyecto Teacher Corps, Ciclo XII (Pedagogical Perspectives. Documents, Papers and Essays, Teacher Corps Project, Cycle XII).  

ERIC Educational Resources Information Center

|The purpose of this book is to stimulate ideas leading to a sharing of approaches, strategies, and methodologies applicable to the education of Puerto Ricans. Following introductory material, 18 papers are presented, the first 10 of which are in Spanish. Titles and authors are: (1) "El maestro que Puerto Rico necesita," Leonides Santos Vargas

Albino, Isidra, Ed.; Davila, Sonia, Ed.

86

The regions development characterisation by diversity\\/variety of the firms – study case for Romania  

Microsoft Academic Search

In this paper we try to find empirical evidence regarding the region diversity by firm characteristics, using spatial data from Tempo (INS Romania database) at NUTS 1, 2 and 3 region level for the period 1997-2008. Using instruments of statistical analysis of spatial data (Anselin, Varga) we try to sketch the spatial pattern of firm agglomerations and values of main

Cristina Lincaru; Draga Atanasiu; Beatrice Chiriac

2011-01-01

87

New families of exact solutions for finitely deformed incompressible elastic materials  

NASA Astrophysics Data System (ADS)

The governing partial differential equations for static deformations of homogeneous isotropic incompressible elastic materials are highly nonlinear, and consequently only a few exact solutions are known. For these materials, only one general solution involving a single arbitrary function is presently known, which is for plane deformations and is applicable to the so-called Varga strain-energy function. In this paper, new families of exact solutions are derived for plane and axially symmetric deformations of perfectly elastic materials. In the case of plane deformations, a different formulation of the known general solution for the Varga strain-energy function is presented, from which numerous new solutions may be obtained. In the case of axially symmetric deformations, the Varga material again arises as the privileged strain-energy function, and this constitutes the main result of the paper. For this material, a number of new simple exact solutions are derived for axially symmetric deformations. Finally, all the solutions obtained here are shown to also apply to a modified Varga strain-energy function involving the reciprocals of the principal stretches.

Hill, James M.; Arrigo, Daniel J.

1995-01-01

88

Comment on ``Four-component relativistic density functional calculations of heavy diatomic molecules'' [J. Chem. Phys. 112, 3499 (2000)  

NASA Astrophysics Data System (ADS)

The present solid analysis shows that the results by Varga et al. [J. Chem. Phys. 112, 3499 (2000)] are not benchmark to calibrate more approximate relativistic approaches. The convergence of the multipolar expansion of the charge density to evaluate the Hartree potential is demonstrated.

Liu, Wenjian; van Wüllen, Christoph

2000-08-01

89

Asymptotic bifurcation results for the eversion of elastic shells  

NASA Astrophysics Data System (ADS)

We apply the WKB method to the bifurcation analysis of everted cylindrical and spherical shells composed of Varga material. Both compressible and incompressible cases are considered. The method is degenerate but we obtain explicit bifurcation criteria and compare with previous numerical approximations. Different strategies are compared.

Haughton, D. M.; Chen, Y.-c.

90

No Cover  

ERIC Educational Resources Information Center

|Born and raised in Los Angeles, Dan Vargas spent his twenties going to punk shows at King's Palace, Club 88, the Cathay de Grand, the Vex, the Starwood, the Hong Kong Cafe, Base's Hall, and the Masque. He has produced for several bands and is currently a songwriter and singer for an LA rock band. In this article, he reflects on the "original"…

Vargas, Dan

2012-01-01

91

On the Impact and Import of A Writer's Reality  

Microsoft Academic Search

In A Writer's Reality, literary critic Dr. Myron Lichtblau and Peruvian writer Mario Vargas Llosa mimic and question the delicate balance between fiction and reality. In doing so, they not only coauthor the book, they also immortalize themselves as writers and characters in their own text. This essay looks through the broad lens of Hispanic letters to argue that the

Gail Bulman

2012-01-01

92

Two new species of Pseudohadena Alph?raky, 1889 from Kazakhstan (Lepidoptera, Noctuidae, Xyleninae)  

PubMed Central

Abstract Two new species of Pseudohadena, Pseudohadena anatine sp. n. and Pseudohadena gorbunovi sp. n. (Lepidoptera, Noctuidae) are described from Ustyurt, Kazakhstan. Illustrations of adults and the genitalia of both sexes are provided. Microstructures of vesicae are described and illustrated. A diagnostic comparison is made with Pseudohadena evanida psammoxantha Ronkay, Varga & Fábián, 1995, Pseudohadena magnitudinis Hacker & Ebert, 2002 and Pseudohadena pseudamoena (Boursin, 1943).

Pekarsky, Oleg

2012-01-01

93

Germination and development of Mimosa pilulifera in petroleum-contaminated soil and bioremediated soil  

Microsoft Academic Search

In 2000 there was an oil spill at the Getúlio Vargas Refinery (REPAR\\/PETROBRÁS) in Paraná, Brazil. Nearly five years after contamination and the use of bioremediation, a study was carried out to identify the effects of the contaminated soil and the bioremediated soil on the germination and initial growth of Mimosa pilulifera seedlings. The experiment consisted of three treatments: petroleum-contaminated

Renata Charvet Inckot; Gedir de Oliveira Santos; Luiz Antonio de Souza; Cleusa Bona

2011-01-01

94

Interaction of science and diplomacy: Latin American, the United States and nuclear energy, 1945-1955  

Microsoft Academic Search

Nuclear programs in Argentina and Brazil can be traced to August 1945 when their scientific communities articulated responses to the atomic bombings of Japan. They culminated in attempts to develop independent nuclear programs, sharply opposed by the United States, during the nationalist governments of Juan Peron and Getulio Vargas. This dissertation, based on primary sources from the three nations, analyzes

Cabral

1986-01-01

95

Exploring the Cultural Content of French Feature Films.  

ERIC Educational Resources Information Center

Presents strategies for exploring the cultural content of feature foreign films in the language or culture and civilization classroom. Examples are taken from Francois Truffaut's "L'Argent de poche" and from Agnes Varga's "L'Une Chante, L'autre pas." (AM)

Carr, Thomas M., Jr.

1980-01-01

96

Revised Robertson's test theory of special relativity: Supergroups and superspace  

Microsoft Academic Search

The revised Robertson's test theory of special relativity (SR) has been constructed upon a family of sets of passive coordinate transformations in flat space-time [J. G. Vargas and D. G. Torr,Found. Phys., 16, 1089 (1986)]. In the same paper, it has also been shown that the boosts depend in general on the velocities of the two frames involved and not

José G. Vargas

1986-01-01

97

Revised Robertson's test theory of special relativity: Supergroups and superspace  

Microsoft Academic Search

The revised Robertson's test theory of special relativity (SR) has been constructed upon a family of sets of passive coordinate transformations in flat space-time [J. G. Vargas and D. G. Torr, Found. Phys., 16, 1089 (1986)]. In the same paper, it has also been shown that the boosts depend in general on the velocities of the two frames involved and

José G. Vargas

1986-01-01

98

Women Faculty of Color in the White Classroom: Narratives on the Pedagogical Implications of Teacher Diversity.  

ERIC Educational Resources Information Center

|This book compiles narratives by women professors of color who examine their classroom experiences in predominantly white U.S. campuses, focusing on the impact of their social positions upon their classroom practices and teaching-learning selves. The 19 papers are (1) "Introduction" (Lucila Vargas); (2) "Why Are We Still So Few and Why Has Our…

Vargas, Lucila, Ed.

99

El Escritor y las Normas del Canon Literario (The Writer and the Norms of the Literary Canon).  

ERIC Educational Resources Information Center

|This paper speculates about whether a literary canon exists in contemporary Latin American literature, particularly in the prose genre. The paper points to Carlos Fuentes, Gabriel Garcia Marquez, and Mario Vargas Llosa as the three authors who might form this traditional and liberal canon with their works "La Muerte de Artemio Cruz" (Fuentes),…

Policarpo, Alcibiades

100

Trauma ocular ocupacional por corpo estranho superficial  

Microsoft Academic Search

Objetivo: Estudar a ocorrência de trauma ocular provocado por corpos estranhos superficiais durante a realização de atividades ocupacionais. Métodos: Estudo prospectivo de pacientes portadores de trauma ocular ocupacional atendidos no serviço de urgência do Hospital Getúlio Vargas (HGV) \\/ Universidade Federal do Piauí (UFPI), no período de outubro de 1997 a março de 1999. Os seguintes dados foram coletados: idade,

Fernando Antônio de Macedo Leal; Arthur Pereira da Silva e Filho; Daniela Martins Neiva; Josilene Carvalho Soares Learth; Durwagner Barros da Silveira

2003-01-01

101

Multiphoton Imaging of Renal Regulatory Mechanisms - Supplemental Videos  

NSDL National Science Digital Library

Video 1 - SNGFR - Video 2 - PT calcium oscillations - Video 3 - TGF DIC - Video 4 - renin release - Video 5 - oscillations time From Peti-Peterdi J, Toma I, Sipos A, Vargas SL. Multiphoton Imaging of Renal Regulatory Mechanisms. Physiology 24: 88-96, 2009

Janos Peti-Peterdi (Departments of Physiology and Biophysics and Medicine); Ildiko Toma (University of Southern California); Arnold Sipos (University of Souther California); Sarah Vargas (University of California)

2009-04-01

102

A Response to Recent Reanalyses of the National Reading Panel Report: Effects of Systematic Phonics Instruction Are Practically Significant  

Microsoft Academic Search

The authors examine the reassessments of the National Reading Panel (NRP) report (National Institute of Child Health and Human Development, 2000) by G. Camilli, S. Vargas, and M. Yurecko (2003); G. Camilli, P. M. Wolfe, and M. L. Smith (2006); and D. D. Hammill and H. L. Swanson (2006) that disagreed with the NRP on the magnitude of the effect

Karla K. Stuebing; Amy E. Barth; Paul T. Cirino; David J. Francis; Jack M. Fletcher

2008-01-01

103

[Occurrence of Platynosomum illiciens in enclosured wild cats in the state of Bahia, Brazil].  

PubMed

This paper reports the occurrence of eggs of Platynosomum illiciens, found in the feces of three species of wild cats Herpailurus yagouaroundi, Puma concolor and Leopardus tigrinus from material collected at the enclosures of the Park Zoobotânico Getúlio Vargas in Salvador, Bahia, Brazil. It is the first record of this parasite in P. onca and L. tigrinus. PMID:19265585

Castro, Letícia S de; Albuquerque, George R

104

Registros documentados de cinco novos trinta-réis (Charadriiformes: Sternidae) no estado do Ceará, nordeste do Brasil  

Microsoft Academic Search

Documented records of five terns (Charadriiformes: Sternidae) new for the State of Ceará, north-east Brazil. We present new records, based on museum specimens and\\/or photographs, of five species of Sternidade for the State of Ceará in north- east Brazil, namely, Black Noddy Anous minutus (apparently the first from Brazilian mainland), Least Tern Sternula antillarum, Black Tern Chlidonias niger, Arctic Tern

Weber Girão; Ciro Albano; Alberto A. Campos; Thieres Pinto; Caio J. Carlos

105

Guia para su incorporacion a los Estados Unidos de America (A Guide to Resettlement in the United States. Spanish).  

ERIC Educational Resources Information Center

|This resettlement guide, entirely in Spanish, describes the initial stage of resettlement and the processes that refugees undergo as new arrivals. Subjects covered in this guide include pre-arrival procedures, admissions criteria, immigrant's statement of understanding, travel costs and U.S. Customs; resettlement procedures, immigrants'…

Center for Applied Linguistics, Washington, DC. Refugee Service Center.

106

ADICIONES AL CONOCIMIENTO DE LA DIVERSIDAD DE LOS HONGOS CONIDIALES DEL BOSQUE MESÓFILO DE MONTAÑA DEL ESTADO DE VERACRUZ  

Microsoft Academic Search

An account of 29 anamorphs and one holomorph species are presented, all of them were collected in several localities of the State of Veracruz, where small areas of cloud forest still remain. All the species are recorded for the first time to Mexico, many of them are scarcely known in the worldwide. Pictures and data about their distribution and substrates

GABRIELA HEREDIA ABARCA; REYES ESTEBANEZ Y ROSA; M. A. ARIAS MOTA; Carretera Antigua; Congregación El Haya; JULIO MENA PORTALES; ÁNGEL MERCADO SIERRA

2004-01-01

107

Relações solo-geoambiente em áreas de ocorrências de Ipucas na planície do Médio Araguaia - Estado de Tocantins  

Microsoft Academic Search

RESUMO - Dentre as paisagens do médio rio Araguaia, destacam-se as extensas planícies e depressões sazonalmente alagadas. Nelas se inserem formações florestais higrófilas denominadas Ipucas, como enclaves peculiares pela sua fitossociologia e ambiente pedogeomorfológico. Esses fragmentos florestais naturais ocorrem na planície fluvial, em região de ecótono entre o Cerrado e a Floresta Amazônica. Neste estudo, foi selecionada uma área de

Alan Kardec Elias Martins; Carlos Ernesto G. R. Schaefer; Elias Silva; Vicente Paulo Soares; Guilherme Resende Corrêa; Bruno Araújo Furtado de Mendonça

2006-01-01

108

OCORRÊNCIA DE TARPON ATLANTICUS (VALENCIENNES, 1846) (PISCES: MEGALOPIDAE) NA BAÍA DE TODOS OS SANTOS (ESTADO DA BAHIA,BRASIL)  

Microsoft Academic Search

The presence of Tarpon atlanticus (Valenciennes, 1846) is recorded for the first time inside the Todos os Santos Bay (State of Bahia, Brazil). Five specimens were analized, measuring between 210,95 and 226,00mm in total length, collected near the mouth of Dorneles River (Araripe de Baixo Beach), Saubara Municipality (13ºS - 39ºW). Morphometric and meristic data, as well as a diagnosis,

Paulo Roberto Duarte Lopes; Marconi Porto Sena

109

Primórdios do Ativismo Feminino nos Estados Unidos e a Violência de Rua EARLY UNITED STATES WOMEN'S ACTIVISM AND STREET VIOLENCE  

Microsoft Academic Search

This paper focus on the role of women in antebellum racial incitement, beginning with Philadelphia and Boston Female Anti-Slavery Societies. The political nature of their abolitionist activities and their acceptance of black women as members led critics to associate the women's groups with the fear of racial \\

JUDITH MULCAHY

110

RELAÇÃO ENTRE OCORRÊNCIA DO AMARELECIMENTO FATAL DO DENDEZEIRO (Elaeis guineensis Jacq.) E VARIÁVEIS AMBIENTAIS NO ESTADO DO PARÁ  

Microsoft Academic Search

The development of a sustainable production system, perennial, with low environmental impact and high socioeconomic potential in the Brazilian Amazon has always been seen as an ideal model of development for the region. In this context, the deployment and the expansion of the cultivation of palm ( Elaeis guineensis Jacq.) was driven and today represents one of agroindustrial activities with

Adriano Venturieri

111

Chironomidae (Diptera) do Rio Ribeira (divisa dos Estados de São Paulo e Paraná) numa avaliação ambiental faunística  

Microsoft Academic Search

Chironomidae (Diptera) in Rio Ribeira (border between the States of São Paulo and Paraná) in an Environmental faunistic evaluation- During a program of limnological characterization, the macrobenthic community was evaluated in a section of river Ribeira, in the area included of the future reservoir UHE Tijuco Alto. In the four expeditions, during XII\\/95 to IX\\/96, samples were collected in five

Susana Trivinho-Strixino; Giovanni Strixino

2005-01-01

112

PRODUÇÃO INTEGRADA DE FRUTAS PIF e a produção de Açaí (Euterpe oleracea Mart) no Estado do Pará: ameaças ou oportunidades?  

Microsoft Academic Search

Este trabalho, apoiado na dinâmica de crescimento do consumo de sucos naturais, como uma das bebidas esportivas associadas à imagem de produto saudável, suscita as questões relacionadas com a aplicação do PIF junto à produção do Açaí, visto a ampliação da aceitação desse produto nos mercados nacional e internacional. Está fundamentado na aplicação da legislação específica e seus pré-requisitos frente

Rubens Cardoso Da Silva; Paulo Cerqueira Dos Santos; Jose Sebastiao Romano De Oliveira; Maria Cristina Das Neves Silva; Ismael Matos Da Silva

2008-01-01

113

Producción de hojarasca en un bosque semideciduo estacional en São Pedro, Potirendaba, estado de São Paulo, Brasil  

Microsoft Academic Search

Litter production was determined during a year in a semideciduous forest located in Potirendaba, State of São Paulo, Brasil. Litterfall was collected at monthly intervals, from June 1999 to May 2000, by placing 15 traps of 0.25 m 2 of surface area. The material was separated into five components and the sorted samples were dried at 80ºC in order to

Maristela Sanches Bertasso-Borges; Dania Prieto Trueba; Fabrícia C. Peral; Cristiane A. R. Tamburi; Ronaldo Caseri; Rosalina Berazaín

114

INVENTARIO DE CONTAMINACIÓN EMITIDA A SUELO, AGUA Y AIRE EN 14 MUNICIPIOS DEL ESTADO DE HIDALGO, MÉXICO  

Microsoft Academic Search

An inventory of pollution for 14 municipalities in Hidalgo, México is reported in this paper. The studied zone concentrates about 40 % of Hidalgo's population, its main communication roads, services, the most representative industries and all the state's industrial zones. Therefore, it is important to determinate qualitative and quantitatively pollution emissions in this area. The methodology used was the environmental

René Bernardo; Elías CABRERA; José GORDILLO MARTÍNEZ; Álvaro CERÓN BELTRÁN

2003-01-01

115

Análisis no destructivo del estado de degradación en morteros bajo la acción de ciclos hielo-deshielo  

Microsoft Academic Search

Evaluation by means of non destructive techniques to deterioration of mortars due to cycles freeze-thawing In this paper we evaluate different mortars, with varying degrees of damage by the action of ice-thawing cycles, and analyzing their status through various methods to assess usual. The results obtained by these methods are compared to an analysis by means of the technique of

E. MEnéndEz; J. dE Frutos

116

EL CULTIVO DE LA CANOLA (Brassica napus Y B. rapa) EN EL ESTADO DE JALISCO, MÉXICO. I. CARACTERÍSTICAS AGRONÓMICAS  

Microsoft Academic Search

Growing canola (Brassica napus and B. rapa) in Jalisco State, Mexico. I. Agronomic characteristics With the purpose of determining some probable benefits of canola production in Jalisco State, Mexico, the crop potential was studied in different counties of the regions of Ciénega and Sur de Jalisco. During four cycles of agricultural production in autumn- winter (2000-2004) varieties of canola were

Ramón Hernández; Alfredo González; Patricia River

117

Estado de conservación de Melanomys zunigae (Sanborn 1949) y de los mamíferos pequeños en las Lomas de Lima  

Microsoft Academic Search

The coastline and the western slopes of the Andes are main sites of Peruvian endemic mammals. Along the central coast occurs the only endemic rat from Lima, Zuniga's dark rice rat, Melanomys zunigae (Sanborn, 1949). It was collected by Enrique Zuñiga in 1942 at Lomas de Atocongo and Cerro San Jerónimo. Since then, sporadic searches have been conducted, not necessarily

José Luis Mena; Martha Williams; Carla Gazzolo; Francesca Montero

118

De la White House a la Black House: elección presidencial de los Estados Unidos en el 2008. ¿Movilidad social ascendente?  

Microsoft Academic Search

The aim of this article is to present a sociological interpretation of the 2008 presidential election in the United States. It suggests that the victory of the democrat Barack Obama, can be analyzed by the conceptual framework of social mobility. The historical-ideological context in which the American dream has emerged and has been transformed; an empirical analysis that reflects the

Juan Paul Farías Peña

119

Atlas de Recursos Eólicos del Estado de Oaxaca (The Spanish version of Wind Energy Resource Atlas of Oaxaca)  

SciTech Connect

The Oaxaca Wind Resource Atlas, produced by the National Renewable Energy Laboratory's (NREL's) wind resource group, is the result of an extensive mapping study for the Mexican State of Oaxaca. This atlas identifies the wind characteristics and distribution of the wind resource in Oaxaca. The detailed wind resource maps and other information contained in the atlas facilitate the identification of prospective areas for use of wind energy technologies, both for utility-scale power generation and off-grid wind energy applications.

Elliott, D.; Schwartz, M.; Scott, G.; Haymes, S.; Heimiller, D.; George, R.

2004-04-01

120

EFEITO DA ÉPOCA DE SEMEADURA SOBRE A QUALIDADE FISIOLÓGICA DE SEMENTE DE SOJA NO ESTADO DO MATO GROSSO1  

Microsoft Academic Search

This study was conducted to determine the effect of planting date on soybean seed quality. The cultivars evaluated were Cristalina, IAC-2, Tropical, Doko, and IAC-8. The sowing dates were stablished between October 29, 1983 and January 7, 1984 (10\\/29, 11\\/11, 11\\/25, 12\\/10, 12\\/24 and 01\\/7), at Lucas do Rio Verde in Mato Grosso State, Brazil. In the plantings carried out

NILTON PEREIRA DA COSTA; JOSÉ DE BARROS; FRANÇA NETO; ADEMIR ASSIS HENNING; FRANCISCO CARLOS KRZYZANOWSKI; NORIVAL TIAGO CABRAL; MÁRCIO C. MENDES

121

Adaptive Estimation of State Noise in a Kalman Filter Estimacao Adaptativa Do Ruido No Estado Para O Filtro de Kalman.  

National Technical Information Service (NTIS)

In the presence of estimates, divergence due to errors in system dynamics modelling and to algorithm numerical ill-conditioning, Kalman filter usefulness is seriously impaired. A procedure to estimate the state noise level adaptively and in real time in o...

A. R. Neto H. K. Kuga

1982-01-01

122

EFECTO DE LA APLICACIÓN DE RESIDUOS ORGÁNICOS SOBRE EL CULTIVO DEL MAÍZ EN SUELOS DEGRADADOS DEL ESTADO YARACUY, VENEZUELA  

Microsoft Academic Search

Effect of applications of organic residues on maize performance in two soils of Yaracuy State, Venezuela The intense land cultivation for maize cropping on the last 50 years in Yaracuy State, Venezuela, caused an accelerated soil degradation expressed by loss of soil organic matter and crop productivity. With the objective of improving those parameters, the use of organic residues were

Isabel Arrieche; Orlando Mora

2005-01-01

123

COMPARACIÓN DE MÉTODOS PARA EL ANÁLISIS DE MERCURIO EN SUELOS PROCEDENTES DE EL CALLAO, ESTADO BOLÍVAR, VENEZUELA  

Microsoft Academic Search

SUMMARY Mercury levels in soil samples from El Callao, Bolívar State, Venezuela, were determined by mineralization in aqua regia followed by cold vapor-atomic absorption spectrometry (CVAAS), and by direct determination on solid matrix by pyrolisis and preconcentration using an automatic mercury analyzer AMA-254 (AMA). Hg concentration in samples were in the range of 0.05 to 17.31mg\\/kg for CVAAS and of

Armando Carrasquero Durán; Melitón Adams

124

Cambios en el uso del suelo y deforestación en el sur de los estados de Campeche y Quintana Roo, México  

Microsoft Academic Search

Landsat MSS satellite imagery from 1975 to 1990 were anaiyzed in order to estimate the rates of conversion of tropical forests and savannas to cropland and pasture in the southern Yucatán Peninsula of Mexiw. The area of southeastern Campeche and southern Quintana Roo was subject of a federally financed directed-colonization program during the seventies, which included felling the tropical forests

Sergio Cortina Villar; Pedro Macario Mendoza; Yelena Ogneva-Himmelberger

125

Ocorrência e coleta de colônias e de enxames de abelhas africanizadas na zona urbana de Maringá, Estado do Paraná, Brasil  

Microsoft Academic Search

Occurrence and collection of Africanized honeybee swarm and colonies on the urbane zone of Maringá, Paraná State, Brazil. During the last years, a great number of swarms of Africanized honey bees migrated to the urban zone of Maringá, Paraná State, Brazil, causing a great concern, mainly in those who live at home with children, elderly and allergic people. This study

Vagner De Alencar Arnaut de Toledo; Fábio Luiz Buranelo Toral; Sidnei Bueno de Miranda; Adilson Shiraishi; Juliano Hideo Hashimoto; Waldirene Rossi da Silva

2006-01-01

126

ANÁLISIS DEL RIESGO PARA LA SALUD PÚBLICA OCASIONADO POR LA EXPOSICIÓN A FLUORUROS EN EL ESTADO DE AGUASCALIENTES, MÉXICO  

Microsoft Academic Search

of the groundwater wells that provide drinking water for the state of Aguascalientes show fluoride concentrations above 1.5 mg\\/L. The objective of our research was to perform a risk analysis study to estimate the health implicationsof fluoride exposure through drinking water in Aguascalientes. Fluoride exposure doses were calculated for local population in each of the state municipalities. These estimates were

Adrián BONILLA-PETRICIOLET; Rodolfo TREJO-VÁZQUEZ; Carlos MÁRQUEZ-ALGARA

127

Perspectiva Historica de la Educacion Bilingue en los Estados Unidos (A Historical Perspective of Bilingual Education in the United States)  

ERIC Educational Resources Information Center

|This article defines bilingualism and bilingual education and traces the history of bilingual education in the United States, starting with the Spanish missions in the west. (Text is in Spanish.) (NCR)|

Zamora, Juan Clemente

1978-01-01

128

Florística y fisonomía de un matorral xerófilo espinoso intervenido en Punta de Piedras, Municipio Miranda, Estado Zulia, Venezuela  

Microsoft Academic Search

Floristic and physiognomic characteristics of disturbed thorny xerophytic scrubland in Punta de Piedras, Miranda Municipality, Zulia State, Venezuela. We determined the floristic and physiognomic aspects of disturbed thorny xerophytic scrubland in Punta de Piedras, Miranda Municipality, Zulia State, Venezuela. Botanical sampling was done twice monthly (November 2005-June 2006), in both rainy and dry seasons, for a total of 16 samples.

Antonio Vera; Maritza Martínez; Yin Ayala; Sadieth Montes; Anderson González

2009-01-01

129

Parameter calibration for synthesizing realistic-looking variability in offline handwriting  

NASA Astrophysics Data System (ADS)

Motivated by the widely accepted principle that the more training data, the better a recognition system performs, we conducted experiments asking human subjects to do evaluate a mixture of real English handwritten text lines and text lines altered from existing handwriting with various distortion degrees. The idea of generating synthetic handwriting is based on a perturbation method by T. Varga and H. Bunke that distorts an entire text line. There are two purposes of our experiments. First, we want to calibrate distortion parameter settings for Varga and Bunke's perturbation model. Second, we intend to compare the effects of parameter settings on different writing styles: block, cursive and mixed. From the preliminary experimental results, we determined appropriate ranges for parameter amplitude, and found that parameter settings should be altered for different handwriting styles. With the proper parameter settings, it should be possible to generate large amount of training and testing data for building better off-line handwriting recognition systems.

Cheng, Wen; Lopresti, Dan

2011-01-01

130

Explanation of how the Karman vortices are generated  

NASA Astrophysics Data System (ADS)

An account is given of the kinematics of vortex-shedding flow in the vicinity of cylinderlike bodies with well-developed cavitation, on the basis of flow visualization study data furnished by Varga and Sebestyen (1970). Alternating jet formation phenomena are shown to be responsible for vortex-generation, as elucidated by a computer model of cavity jet-formation conditions. Based on these conditions, an explanation is given of vortex-shedding dynamics for both cavitating and noncavitating flows.

Fay, Arpad

131

Few-body problem in terms of correlated Gaussians  

NASA Astrophysics Data System (ADS)

In their textbook, Suzuki and Varga [Stochastic Variational Approach to Quantum-Mechanical Few-Body Problems (Springer, Berlin, 1998)] present the stochastic variational method with the correlated Gaussian basis in a very exhaustive way. However, the Fourier transform of these functions and their application to the management of a relativistic kinetic energy operator are missing and cannot be found in the literature. In this paper we present these interesting formulas. We also give a derivation for formulations concerning central potentials.

Silvestre-Brac, Bernard; Mathieu, Vincent

2007-10-01

132

REFLEXÕES SOBRE A POLÍTICA E A LINGUAGEM: A música brasileira na visão de Heitor Villa-Lobos  

Microsoft Academic Search

Resumo : O presente artigo visa um breve estudo da obra de V illa-Lobos e sua posição em meio ao contexto modernista -característico de u ma época de transformações- e ao cenário do governo de Getúlio Vargas. Palavras-chave: Modernismo; Villa-Lobos; Música . Abstract : The present article seeks an abbreviation study of the work of Villa-Lobos and your position amid

Patrícia Muniz Mendes; Priscila da Costa Pinheiro

133

Side-effects of organic and synthetic pesticides on cold-stored diapausing prepupae of Trichogramma cordubensis  

Microsoft Academic Search

The side-effects of three insecticides (deltamethrin, lambda-cyhalothrin and Bacillus thuringiensis Berliner) and one fungicide (basic copper sulphate) were tested on cold-stored diapausing prepupae of Trichogramma cordubensis Vargas and Cabello (Hymenoptera: Trichogrammatidae). Pesticides were directly sprayed on parasitized host eggs (being the\\u000a diapausing parasitoids in the prepupal stage) after cold storage (3°C) for three different periods (60, 120 and 180 days).\\u000a Regardless

Patrícia Ventura Garcia; Nuno Pereira; Luísa M. Oliveira

2009-01-01

134

Feasibility of nuclear quadrupole resonance as a novel dosimetry tool  

Microsoft Academic Search

Nuclear quadrupole resonance (N.Q.R) frequencies are influenced by the symmetry of the charge distribution of a compound around the site of interest. Damage by ionizing radiation causes changes in this charge symmetry which can be detected by standard pulsed N.Q.R. methods. Previous work done on various chlorates of [sup 35]Cl at room temperature (Vargas et al., 1978) shows a linear

L. H. Iselin; D. E. Hintenlang; S. J. Epperson; G. A. Higgins; K. Jamil

1990-01-01

135

Feasibility of nuclear quadrupole resonance as a novel dosimetry tool  

Microsoft Academic Search

Nuclear quadrupole resonance (N.Q.R) frequencies are influenced by the symmetry of the charge distribution of a compound around the site of interest. Damage by ionizing radiation causes changes in this charge symmetry which can be detected by standard pulsed N.Q.R. methods. Previous work done on various chlorates of ³⁵Cl at room temperature (Vargas et al., 1978) shows a linear effect

L. H. Iselin; D. E. Hintenlang; S. J. Epperson; G. A. Higgins; K. Jamil

1990-01-01

136

Electromechanical stability of compressible dielectric elastomer actuators  

NASA Astrophysics Data System (ADS)

The constitutive relation and the electromechanical stability of Varga-Blatz-Ko-type compressible isotropic dielectric elastomers undergoing large deformation are investigated in this paper. Free energy in any form, which consists of elastic strain energy and electric field energy, can be applied to analyze the electromechanical stability of dielectric elastomers. The constitutive relation and the electromechanical stability are analyzed by applying a new kind of free energy model, which consists of elastic strain energy, composed of the Varga model as the volume conservative energy and the Blatz-Ko model as the volume non-conservative energy, and electric field energy with constant permittivity. The ratio between the principal planar stretches, the ratio between the thickness and length direction stretches, and the power exponent of the stretch are defined to characterize the mechanical loading behavior and compressible behavior of the dielectric elastomer. Along with the increase of these parameters, which determine the shape or volume of the elastomer, and the Poisson ratio, the critical nominal electric field is higher, which indicates a more stable dielectric elastomer electromechanical system. In contrast, with the decrease of the dimensionless material parameter ? of the Varga elastic strain energy, the critical nominal electric field increases. The coupling system becomes more stable. We further demonstrate that the critical nominal electric field of the compressible dielectric elastomer electromechanical coupling system is significantly influenced by the ratio between the principal planar stretches.

Liu, Liwu; Liu, Yanju; Leng, Jinsong; Lau, Kin-tak

2011-11-01

137

Aragonian stratigraphy reconsidered, and a re-evaluation of the middle Miocene mammal biochronology in Europe  

NASA Astrophysics Data System (ADS)

The recently collected fauna of Armantes 1A in Chron C5Br of the Armantes section necessitates reinterpretation of the previous bio- and magnetostratigraphical correlations between the Armantes and Vargas sections (Calatayud-Daroca Basin, Central Spain) [W. Krijgsman, M. Garcés, C.G. Langereis, R. Daams, J. van Dam, A.J. van der Meulen, J. Agust?´, L. Cabrera, A new chronology for the Middle to Late Miocene continental record in Spain, Earth Planet. Sci. Lett. 142 (1996) 367-380]. The long reversal in the Vargas section is now correlated to C5Br, instead of to C5Cr, on the basis of the biostratigraphical correlation of Armantes 1A to the faunas of Fuente Sierra 2 and 3 (in the Vargas section), which are situated in the basal part of the Middle Aragonian (MN5). This leads to the revised age of 16.0 Ma for the Early-Middle Aragonian (MN 4/5) boundary. Our age estimate of the MN5/6 boundary is maintained at ca. 13.75 Ma. The Vargas section is now considered to start in Chron C5Cn.2r and to end in C5Bn.1n. As a result of the revised correlation the duration of the time gap between the fossiliferous parts of Vargas and the younger Aragón section, previously estimated as ca. 1.5 Myr, is now reduced to less than 200,000 years. The tie points of the European mammal units (MN4-MN6) to the geomagnetic polarity time scale [F.F. Steininger, W.A. Berggren, D.V. Kent, R.L. Bernor, S. Sen, J. Agust?´, Circum-Mediterranean Neogene (Miocene and Pliocene) marine-continental chronologic correlations of European mammal units, in: R.L Bernor, V. Fahlbusch, H.-W. Mittmann (Eds.), The Evolution of Western Eurasian Neogene Mammal Faunas, Columbia Univ. Press, New York, 1996, pp. 7-46] are evaluated. Our age estimates of the MN4/5 and MN5/6 boundaries are compatible with the new magnetostratigraphic calibration of middle Miocene mammal zones in the Swiss Molasse basin [O. Kempf, T. Bolliger, D. Kälin, B. Engesser, A. Matter, New magnetostratigraphic calibration of Early to Middle Miocene mammal biozones of the North Alpine foreland basin, in: J.-P. Aguilar, S. Legendre, J. Michaux (Eds.), Actes du Congrès BiochroM '97, Mém. Trav. E.P.H.E. 21 (1997) 547-562].

Daams, R.; van der Meulen, A. J.; Alvarez Sierra, M. A.; Peláez-Campomanes, P.; Krijgsman, W.

1999-02-01

138

Métodos para la suavización de indicadores de mortalidad: aplicación al análisis de desigualdades en mortalidad en ciudades del Estado español (Proyecto MEDEA)  

Microsoft Academic Search

Although there is some experience in the study of mortality inequalities in Spanish cities, there are large urban centers that have not yet been investigated using the census tract as the unit of territorial analysis. The coordinated project «Socioeconomic and environmental inequalities in mortality in Spanish cities. The MEDEA project» was designed to fill this gap, with the participation of

M. Antònia Barceló; Marc Saez; Gemma Cano-Serral; Miguel Ángel Martínez-Beneito; José Miguel Martínez; Carme Borrell; Ricardo Ocaña-Riola; Imanol Montoya; Montse Calvo; Gonzalo López-Abente; Maica Rodríguez-Sanz; Silvia Toro; José Tomás Alcalá; Carme Saurina; Pablo Sánchez-Villegas; Adolfo Figueiras

2008-01-01

139

Comunicação relacionada ao uso de agrotóxicos em região agrícola do Estado do Rio de Janeiro Pesticide use reporting in a rural area of Rio de Janeiro state, Brazil  

Microsoft Academic Search

Objective To assess communications aspects related to pesticide use in a rural area of the Rio de Janeiro state, Brazil. Methods The study was carried out in the area of São Lourenço stream. It was based on methodological triangulation comprising: semi-structured interviews and observation of a local population sample (about 600 inhabitants); structured questionnaire to collect data on the local

Frederico Peres; Brani Rozemberg; Sérgio Rabello Alves; Josino Costa Moreira; Jefferson José Oliveira-Silva

140

VIABILIDADE TÉCNICA E ECONÔMICA DA SUBSTITUIÇÃO DE FONTES CONVENCIONAIS DE ENERGIA POR BIOGÁS EM ASSENTAMENTO RURAL DO ESTADO DE SÃO PAULO1  

Microsoft Academic Search

The aim of this work was to evaluate the economic feasibility of two biodigestion systems using animal excrements in a rural settlement, in Itaberá - SP, Brazil, in the year of 2005. One of them was constructed to supply biogas for five residences. The other one was constructed to supply biogas for production activities. The generated benefits related to the

MAURA S. T. ESPERANCINI; FERNANDO COLEN; OSMAR DE C. BUENO; ANDRÉA E. B. PIMENTEL; ELIAS J. SIMON

141

…TICA Y G…NERO EN LA OBRA DE PIONEROS Y PIONERAS DE LA PSICOLOG?A EN ESTADOS UNIDOS DE NORTEAM…RICA Y CHILE1  

Microsoft Academic Search

This study seeks the presence of contents related to gender and ethics in the writings of 12 pioneers in psychology, both from United States and Chile: William James, Stanley Hall, James Baldwin, Mary Calkins, Margaret Washburn, Helen Thompson, Hernán Larraín, Salvador Cifuentes, Sergio Yulis, Lola Hoffmann, Héliettè Saint Jean, and Leyla Holmberg. We confirmed our central hypothesis, that a prevalence

MARÍA I NÉS WINKLER; DIANA PASMANIK; XIMENA WOLFF; MARÍA ISABEL REYES; HELIA VARGAS

142

…TICA Y G…NERO EN LA OBRA DE PIONEROS Y PIONERAS DE LA PSICOLOG?A EN ESTADOS UNIDOS DE NORTEAM…RICA Y CHILE 1  

Microsoft Academic Search

This study seeks the presence of contents related to gender and ethics in the writings of 12 pioneers in psychology, both from United States and Chile: William James, Stanley Hall, James Baldwin, Mary Calkins, Margaret Washburn, Helen Thompson, Hernán Larraín, Salvador Cifuentes, Sergio Yulis, Lola Hoffmann, Héliettè Saint Jean, and Leyla Holmberg. We confirmed our central hypothesis, that a prevalence

MARÍA I NÉS WINKLER; DIANA PASMANIK; XIMENA WOLFF; MARÍA ISABEL REYES; HELIA VARGAS

143

BIOLOGIA ALIMENTAR DO BAGRE GENIDENS GENIDENS (VALENCIENNES, 1839) NA BARRA DA LAGOA DO AÇU, NORTE DO ESTADO DO RIO DE JANEIRO  

Microsoft Academic Search

FEEDING BIOLOGY OF THE CATFISH GENIDENS GENIDENS (VALENCIENNES, 1839) FROM THE AÇU LAKE SAND BARR IN THE NORTH OF THE STATE OF RIO DE JANEIRO. The article describes the feeding habits of the catfi sh Genidens genidens (Valenciennes, 1839) caught in the Açu Lake, an impor- tant coastal lagoon in the north of the state of Rio de Janeiro. It

Mona Lisa; Ribeiro Pedra; Marcelle de Azevedo Oliveira; Ronaldo Novelli

144

Determinação da área de vida e do uso de hábitats pela jaguatirica (Felis pardalis) na região nordeste do Estado de São Paulo  

Microsoft Academic Search

The brazilian ocelot (Felis pardalis mitis) is one of the facing extinction cats due mainly to the loss of habitat. This animal occurs mainly in the vegetal tree coverings and feeds itself basically of small vertebrate animals as rodents, reptiles and birds among others. This study was carried through in the Jatai Ecological Station, in the period between March, 2000

Ana Lia de Barros; José Eduardo Mantovani; Caixa Postal

145

Qualidade de ambiente para a onça-pintada, puma e jaguatirica na Baía de Guaratuba, Estado do Paraná, utilizando os aplicativos Capture e Presence  

Microsoft Academic Search

Environmental quality for jaguar, puma and ocelot in Guaratuba Bay, State of Paraná, using the programs Capture and Presence. Two month-long expeditions to Guaratuba Bay in the southern Atlantic Forest of Brazil were conducted in 2006. Parameters calculated from vestiges and camera-trap sampling were mammalian richness and proportion of area occupied (PAO) by jaguar, puma, and opportunistically, by ocelot. Eight

Marcelo Mazzolli; Matthias Ludwig; Alfons Hammer; Projeto Puma; Liberato Carioni

2008-01-01

146

Cambios en el uso de tabaco y factores relacionados en estudiantes del sexto al noveno grado, Estado Lara, Venezuela, años 2000 y 2003  

Microsoft Academic Search

The Global Youth Tobacco Survey (GYTS) is a school-based surveillance system. In Lara State, Venezuela, it was conducted by a coalition of or- ganizations. The instrument includes: attitudes, knowledge, behaviors, exposure to environmen- tal tobacco smoke, mass media, and marketing. Participation was 85.7% in 2000 and 79.3% in 2003. Comparing prevalence (%) from 2000 to 2003: \\

Ricardo Granero; Magda Sánchez

2006-01-01

147

Validación de escalas de seguridad alimentaria y de apoyo social en una población afro-colombiana: aplicación en el estudio de prevalencia del estado nutricional  

Microsoft Academic Search

We conducted a cross-sectional study on 193 mothers of children 6 to 18 months of age in an African-Colombian community, with the objec- tives: (1) to adapt and validate the Community Childhood Hunger Identification Project scale, the DUKE-UNC-11 social support scale, and the Quebec Longitudinal Study of Child Develop- ment (QLSCD) partner support scale, and (2) to identify any existent

Beatriz Eugenia Alvarado; María Victoria Zunzunegui; Helene Delisle

148

Influence of Conduction States on the Electronic Properties of Doped Semiconductors Influencia DOS Estados de Conducao Sobre as Propriedades Eletronicas de Semicondutores Dopados.  

National Technical Information Service (NTIS)

A model for the calculation of electronic properties of doped semiconductors, that considers the presence of the conduction band of the host material, is proposed. The model is derived from the standard basis operator form of the extended Anderson model. ...

L. F. Perondi R. Kishore

1983-01-01

149

Bactérias transportadas em mutucas (Diptera: Tabanidae) no nordeste do estado do Pará, Brasil Bacteria transported by horseflies (Diptera: Tabanidae) in the northeast of Pará State, Brazil  

Microsoft Academic Search

Resumo: Os insetos da família Tabanidae (Diptera), conhecidos vulgarmente como mutucas, são considerados potenciais pragas ao homem e animais domésticos pelo comportamento hematófago de suas fêmeas. São capazes de transportar mecanicamente vírus, bactérias e helmintos, pelo fato desses patógenos aderirem-se à estrutura da probóscide. As coletas dos insetos foram realizadas em áreas peri-urbanas e florestadas, utilizando-se armadilhas Malaise e cavalos

Willy Cristiano Luz-Alves; Inocêncio de Sousa Gorayeb; José Caetano Lima Silva; Edvaldo Carlos; Brito Loureiro

150

Perfil de atividade física em escolares da rede pública de diferentes estados nutricionais Physical activity profile among children of public school of different nutritional status  

Microsoft Academic Search

JENOVESI, J.F.; BRACCO, M.M.; COLUGNATI, F.A.B.; TADDEI, J.A.A.C. Physical activity profile among children of public school of different nutritional status. R. bras. Ci. e Mov. 2003; 11(4): 57-62. The aim of study was to compare physical activity levels among school children of different nutritional status. The sample was composed of 2519 children of both sexes (male 50,7%; female 49,3%), of

Jefferson Ferreira Jenovesi; Mario Maia Bracco; Fernando Antonio; Basile Colugnati

151

A Transferencia do Controle da Educacao da Igreja para o Estado (The Transfer of Educational Control from the Church to the State).  

ERIC Educational Resources Information Center

|Analyzes the principal phases in the historical process of the occidental world that resulted in the transfer of educational control from the church to the state, demonstrating some of the consequences of this historic turn. (BT)|

Silva, Marcos

2000-01-01

152

Assistência pré-natal, baixo peso e prematuridade no Estado de São Paulo, 2000 Prenatal care, low birth weight and prematurity in Brazil, 2000  

Microsoft Academic Search

Objective The historical evolution of infant mortality rate and neonatal mortality according to birth weight and term of delivery in the state of São Paulo are presented to assess the role of the number of prenatal visits and others factors for determining mortality. Methods Based on data available from the Seade Institute of Vital Statistics, four variables (maternal age, marital

Samuel Kilsztajn; Manuela Santos; Gustavo Toshiaki; Lopes Sugahara

2003-01-01

153

LA HABITABILIDAD DESDE UNA PERSPECTIVA SUBJETIVA: EL CASO DE LA AGEB 010-9 DEL FRACCIONAMIENTO OJO DE AGUA, MUNICIPIO DE TECÁMAC, ESTADO DE MÉXICO  

Microsoft Academic Search

El crecimiento desmedido e incontenible de la Zona Metropolitana de la Ciudad de México en los últimos 50 años, concatenado a las políticas de liberalización y desregulación económicas ha conformado un espacio con grandes núcleos de concentración generando problemas de habitabilidad y calidad de vida para sus habitantes. El diagnosticar la habitabilidad de dichas zonas es un trabajo complejo, pues

Osvaldo Velázquez Mejía

2010-01-01

154

Satisfação de Idosos com Aparelhos Auditivos Concedidos no Estado do Tocantins Satisfaction of Elderly with Hearing Aid Conceded in Tocantins State  

Microsoft Academic Search

Method: Forty elderly hearing aid users were selected to complete the Satisfaction with Amplification in Daily Life scale. This self-report inventory was developed by COX and ALEXANDER (1999) and was translated into Portuguese and modified according to individual's reality. Besides the Satisfaction with Amplification in Daily Life questionnaire, additional tools were used to help better understand the factors that interfere

Janaina Santo; Amore de Carvalho

155

ESTUDIO PRELIMINAR DE LA INFLUENCIA DE LA COSTRA MICROBIÓTICA EN LOS SUELOS DE QUÍBOR, ESTADO LARA, VENEZUELA, MEDIANTE MICROANÁLISIS DE RAYOS-X (EDS)  

Microsoft Academic Search

A microbiotic crust, consisting photosynthetic organisms, develops in about the first 3mm of surface in the locality of Quíbor Lara state, Venezuela. The crust is constituted by algae, cyanobacteria, mosses (bryophytes) and lichens. The objective of this investigation is the determination of the chemical elements that compose the matrix of the soil with microbiotic crust in the interphases morphological soil-structure

156

LOS EFECTOS DEL RELAJAMIENTO SOBRE EL ESTADO DE ANSIEDAD Y EN LOS NIVELES DE IgA EN LA SALIVA DE MUJERES EN PUERPERIO  

Microsoft Academic Search

This experimental study aimed to evaluate the effect of relaxation techniques on anxiety levels, and the relation between anxiety and the concentration of Immunoglobulin A. The study was carried out in a maternity hospital in a city of the State of Espírito Santo, Brazil. The sample was composed of 60 puerperae. The information on the variables: age, education, marital status,

Cândida Caniçali Primo

157

Estado actual y recomendaciones sobre la utilización de los sistemas de monitorización continua de glucosa en niños y adolescentes con diabetes mellitus tipo 1  

Microsoft Academic Search

Glucose monitoring methods have made great advances in the last decade with the appearance of the continuous glucose monitoring systems (CGMS) that measure the glucose levels in the interstitial liquid, providing information about glucose patterns and trends, but do not replace the self-monitoring of capillary glucose.Improvement in diabetes control using the CGMS depends on the motivation and training received by

M. Torres Lacruz; R. Barrio Castellanos; B. García Cuartero; A. Gómez Gila; I. González Casado; F. Hermoso López; C. Luzuriaga Tomás; M. Oyarzabal Irigoyen; I. Rica Etxebarria; M. Rodríguez Rigual

2011-01-01

158

RESPOSTA A DOSES DE NITROGÊNIO E AVALIAÇÃO DO ESTADO NUTRICIONAL DO ARROZ IRRIGADO IRRIGATED RICE RESPONSE TO NITROGEN LEVELS AND ITS NUTRITIONAL STATE EVALUATION  

Microsoft Academic Search

Morphological and physiological characteristics of rice cultivars may influence nutrient amounts required by rice plants and their response to nitrogen (N) application. The objective of this study was to evaluate the response of two irrigated rice cultivars to nitrogen levels and its relation to nutritional plant state during the vegetative cycle, using a chlorophyll meter and a Leaf Color Chart

Leandro Souza da Silva; Humberto Bohnen; Elio Marcolin; Vera Regina; Mussoi Macedo

159

Resposta de fase aguda, subnutriÁªo e estado nutricional do ferro em adultos com AIDS Iron status, malnutrition and acute phase response in HIV-positive patients  

Microsoft Academic Search

Nutritional status and some iron metabolism parameters of acute phase response (APR) positive and APR-negative AIDS patients were studied. Twenty-nine AIDS patients were submitted to 24h food intake recall, anthropometry, and albumin, C-reactive protein (CRP), hemoglobin, ferritin, and total iron binding capacity (TIBC) measurements. Infection plus serum CRP > 7mg\\/dl were criteria for APR presence. Protein-energy malnutrition (PEM) was ascertained

Jacqueline Pontes Monteiro; Daniel Ferreira da Cunha; Freire de Carvalho da Cunha; Mário León Silva-Vergara; Dalmo Correia; Maria de Lourdes; Pires Bianchi

160

AVALIAÇÃO DO ESTADO QUÍMICO E ECOLÓGICO DOS CORPOS D' ÁGUA SOB O ENFOQUE DA NOVA DIRETRIZ DA ÁGUA DA UNIÃO EUROPÉIA  

Microsoft Academic Search

Desde os anos 90 existe um esforço da União Européia em promover a proteção ecológica dos corpos d'água. Com a nova Diretriz da Água do Parlamento Europeu e do Conselho, de 23 de Outubro de 2000, pela primeira vez, uma orientação ecológica foi atingida na União Européia. Várias ações estão sendo implementadas, dentre elas ressalta-se o estabelecimento de um plano

Alessandra Maciel; Maria do Carmo Sobral; Günter Gunkel

161

ESTADO NUTRIMENTAL Y CRECIMIENTO DE VITROPLANTAS DE CAÑA DE AZÚCAR EN RESPUESTA A REGULADORES DE CRECIMIENTO Nutritional Status and Growth of Sugarcane Vitroplants in Response to Growth Regulators  

Microsoft Academic Search

En este estudio se analizó la influencia de auxinas y citocininas en el contenido de nutrimentos y crecimiento vegetal de vitroplantas de caña de azúcar (Saccharum spp.) de la variedad ITV 92-1424. Se evaluaron dos factores: ácido indol-3-acético (AIA), como fuente de auxina, y N6-furfurilade nina (kinetina o KIN), como fuente de citocinina, con cinco niveles cada uno (0, 0.5,

Odón Castañeda-Castro; Fernando C. Gómez-Merino; Libia I. Trejo-Téllez; Miriam C. Pastelín-Solano; Yolanda Martínez-Ocampo; Marina Guevara-Valencia

2008-01-01

162

Análise Ecoepidemiológica da Incidência da Doença de Chagas em Abaetetuba, Barcarena e Bragança, no estado do Pará, entre 2000 e 2006, utilizando Geotecnologias Livres  

Microsoft Academic Search

The main propose of this paper is to demonstrate the ecoepidemiological analysis of the spatial distribution of vectors of Chagas's Disease in the municipalities of Abaetetuba, Barcarena and Bragança, in the state of Pará. Taking into account that the incidence of this disease is linked to human activities such as deforestation, agriculture for subsistence, among others. To achieve this goal

Cláudia Souza; Douglas Gasparetto; Cleice T. N. Souza; Nelson F. L. Soffiatti

163

Mapeamento da cobertura natural e uso da terra como subsidio ao estudo da dinâmica e ocupação do Estado do Tocantins entre 1990 e 2007  

Microsoft Academic Search

In the Amazon Region large areas of savannas and forests have been changing in pasture and agriculture that modify the environment resulting in environmental and economic problems. The Tocantins state has climatics and physicals features common with Amazon and the Brazil Central Region and it is a transiction zone. On the purpose of study the dynamic of coverage and land

Marco Aurélio Barros

164

Caracterização da vegetação no município de Marabá, no estado do Pará, através de dados e transformações espectrais (Índice de Vegetação por Diferença Normalizada) do sensor ETM+ \\/ Landsat 7  

Microsoft Academic Search

The objective of this work is to evaluate the spectral response of several vegetation physiognomies in the municipality of Maraba, Para, in relation to the reflectance in Landsat -7 ETM+ and to NDVI (\\

Adriana Gomes Affonso; Dalton de Morrison Valeriano; Getúlio Teixeira Batista

2005-01-01

165

LUMINA, una Cohorte de Pacientes con Lupus en Minorías Étnicas de Estados Unidos. ¿Qué Hemos Aprendido? LUMINA, a Multiethnic US Lupus Cohort What Have We Learned?  

Microsoft Academic Search

Systemic lupus erythematosus (SLE) tends to be a more serious disease (disease manifestations, disease activity, damage accrual and expected survival) among non-Caucasian populations. Distinctive biological and genetic features, as well as socioeconomic features play an important role in the discrepant course, and outcome of the disease among patients from different ethnic groups. To delineate the influence of these factors on

Mónica Fernández; Jaime Calvo-Alén; Qing Li; Gerald McGwin Jr; Luis M. Vilá; John D. Reveille; Graciela S. Alarcón

166

CAPACIDADE DE CARGA TURÍSTICA EM CAVERNAS: ESTADO-DA-ARTE E NOVAS PERSPECTIVAS 1 TOURIST CARRYING CAPACITY IN CAVES: STATE-OF-ART AND NEW PERSPECTIVES  

Microsoft Academic Search

This work presents some studies related to the behavioral and physical limits for tourism in Brazilian caves, as well as trends in current research on speleoturist carrying capacity. The methods of research were based on surveys including world examples for any comparisons with caves in Brazil. Three main approaches were found for the management of tourist caves: 1) control of

Heros Augusto; Santos Lobo; José Alexandre de Jesus; Paulo César

2009-01-01

167

DIFERENCIAS EN LAS CONDICIONES DE SALUD Y ENFERMEDAD EN LAS POBLACIONES RURALES Y URBANO-MARGINALES EN EL ESTADO DE NUEVO LEÓN  

Microsoft Academic Search

This work shows the results of two surveys taken in the state of Nuevo León, Mexico during 1985. The first survey, which covered morbidity and health service use, was taken from 759 households in urbanlsuburban Mon- terrey (a city of two million inhabitants and capital of the state of Nuevo León) and from 751 households from a stratified sample from

AXEL KROES; FERNANDO MALO; CARMEN PÉREZ SAMANIESO; HEINRICH BERG

168

Dynamical Hyperpolarizabilities from Real-Time Density Functional Theory  

NASA Astrophysics Data System (ADS)

The explicitly time dependent wave function obtained in the framework of Real-Space, Time-Dependent Density Functional Theory captures the essential physics and allows a non-perturbative calculations of important observables. We generalize finite-difference method typically used to calculate static hyperpolarizabilities to the dynamical case footnotetextV. A. Goncharov and K. Varga, J. Chem. Phys., 2012, 137, 094111 and compute nonlinear optical response functions to the third order inclusively. The method is simple and free of errors associated with basis function based methods. Comparison with experimental results for a range of molecules including C60 is presented.

Goncharov, Vladimir; Varga, Kalman

2013-03-01

169

Focusing of light through a stratified medium: a practical approach for computing microscope point spread functions. Part I: Conventional microscopy  

NASA Astrophysics Data System (ADS)

We propose a method for microscope point spread function computation in which both design and actual acquisition parameters are explicitly introduced in the integrals describing the electromagnetic field in the focal region. This model therefore combines the ease of use of the Gibson and Lanni scalar approach with the accuracy of the Török and Varga method. We also compare some theoretical predictions of this model with those of a scalar model. In particular, the scalar model underestimates the point spread function size. This has practical application, for example when deconvolving microscope images or analyzing point spread functions. The method may also be used for confocal microscopy.

Haeberlé, Olivier

2003-02-01

170

Quantum transport in carbon nanotube field effect transistors  

NASA Astrophysics Data System (ADS)

We have investigated the transport properties of carbon nanotube field effect transistors using the recently developed source-and-sink method [1]. We report first-principles results on the current-voltage characteristics of semiconducting carbon nanotubes in transverse electric field, highlighting differences with Si-based devices, e.g., band mixing caused by the gate electric field. We also find that the source-drain current exhibits an intrinsic saturation as function of the gate voltage. The calculated results are in good overall agreement with pertinent experiments. [1] K. Varga and S. T. Pantelides, Phys. Rev. Lett. submitted for publication.

Varga, Kalman; Pantelides, S. T.

2007-03-01

171

Spin-polarized field emission from nanotubes  

NASA Astrophysics Data System (ADS)

Time-dependent density functional theory has been used to calculate the spin-polarized field emission from carbon nanotubes with and without Fe adsorbates (atoms and clusters). Using our previously-developed approach [1], the electronic wave function was propagated in real time. Complex absorbing potentials have been employed to avoid artificial reflections from the boundaries and to allow long time simulations. It was observed that various adsorbates cause the separation of density into spin-polarized regions. The calculations predict that carbon nanotubes with various adsorbates can be used as spin-polarized current sources. [4pt] [1] J. A. Driscoll and K. Varga, Phys. Rev. B 80, 245431 (2009).

Driscoll, Joseph; Cook, Brandon; Bubin, Sergiy; Varga, Kalman

2011-03-01

172

Old and new from SOR  

NASA Astrophysics Data System (ADS)

From the long history of Successive Over Relaxation (SOR) between the end of second world war and today three points are considered: (1) Classical results of Young and Varga are described. (2) It is shown how results on semiiterative methods can be used to derive these classical results in a unifying way and to compare SOR with other iterative methods. (3) In the last 15 years the application of SOR to compute the stationary distribution of a homogeneous Markov chain has been discussed. These results are reported, considering especially the term "extended convergence" introduced by Kontovasilis, Plemmons and Stewart.

Niethammer, Wilhelm

2000-09-01

173

Role of Strain in Nucleation of BCC Fe in Ultrathin FCC films  

NASA Astrophysics Data System (ADS)

Fe on Cu(100) has been studied extensively for the last three decades owing to its apparent ability to stabilize the ferromagnetic fcc phase of Fe. All measurements on the magnetic structure agree quite well. We have analysed the crystallographic structure by STM with atomic resolution. We could show that ferromagnetic Fe layers up to 4 ML are not fcc or fct as has been determined by LEED but form nanosized domains of strained bcc which we call nanomartensite(1). 5-10ML Fe/Cu(100) (which show surface magnetism) exhibit a 1x2 and 2x2 surface reconstruction, which is strongly influenced by hydrogen. Furthermore for this layer thickness, a direct view of the very initial stage of the nucleation and subsequent reaxation of the martensitic bcc structure on an atomic scale will be presented. The STM images reveal the nucleation centres as nanometer sized strained bcc crystals. They form virtually without mass transfer under conservation of volume (2). As a conclusion it seems that ferromagnetic Fe is always bcc or strained bcc but never fcc. (1) A.Biedermann, R.Tscheliessnig, M.Schmid and P.Varga, PRL 87(2001)086103 (2)A.Biedermann, M. Schmid and P.Varga, PRL 86(2001)464

Varga, Peter

2003-03-01

174

The intermediate oxidation of the Pd(100) surface  

NASA Astrophysics Data System (ADS)

The formation of oxides on metal surfaces has recently received much attention. Apart from the fundamental importance of the oxidation process, the interest is driven by the observation that oxides can play an important role in catalysis1, 2. The geometric structure of surface oxides can in some cases3 not be directly inferred from known bulk oxides. The surface structures formed by oxygen on Pd(100) have been studied by Scanning Tunneling Microscopy (STM), High Resolution Core-Level Spectroscopy (HRCLS) and Low Energy Electron Diffraction (LEED). It is shown that the structure determined in a recent LEED analysis4 of the Pd(100)- (root5xroot5)-O structure formed by adsorption of 0.8 ML of oxygen is difficult to reconcile with our STM and HRCLS data. New models for this surface oxide consistent with our experimental results are suggested. [1] Y. D. Kim, A. P. Seitsonen, S. Wendt, E. Lundgren, M. Schmid, P. Varga, A. Morgante, and G. Ertl., Science 287, 1474 (2000). [2] B. L. M. Hendriksen and J. W. M. Frenken, Phys. Rev. Lett. 89, 046101 (2002). [3] E. Lundgren,, G. Kresse, C. Klein, M. Borg, J.N. Andersen, M. De Santis, Y. Gauthier, C. Konvicka, M. Schmid, and P.Varga, Phys. Rev. Lett. 88 (2002) 246103 [4] M. Saidy, O.L. Warren, P.A. Thiel, and K.A.R. Mitchell, Surf. Sci. 494, L799 (2001).

Mikkelsen, A.; Lundgren, E.; Gustafson, J.; Borg, M.; Andersen, J. N.

2003-03-01

175

Lie group analysis and plane strain bending of cylindrical sectors for compressible nonlinearly elastic materials  

NASA Astrophysics Data System (ADS)

The plane strain bending of cylindrical sectors for two important classes of homogeneous, isotropic, compressible, nonlinearly elastic materials is considered. In contrast to the traditional approach to this problem, a double semi-inverse approach is adopted here. The strain-energy densities and the deformation fields considered each contain an arbitrary function. The deformation field is completely determined from the equations of equilibrium (as is usual) but additionally here the strain-energy function is completely determined on using Lie's linearization theorem. This theorem gives necessary and sufficient conditions for a second-order ODE to be linearizable, i.e. for a second-order equation to have a solution of the form y = ax + b, where a, b are constants and x, y are transformed variables. For harmonic materials, it has been shown in the literature that a quadrature solution can be developed. Due to the restrictive nature of an invertibility assumption inherent in this approach, however, it is shown here that very few closedform solutions can be found in this way. The use of Lie's linearization theorem does lead to some new solutions for particular harmonic materials. This method does not, however, provide any new solutions for Varga materials. When the linearization theorem fails to determine the arbitrary function in the strainenergy density, invariance techniques are used. A new parametric solution for a specific Varga material is determined in this way.

Horgan, Cornelius O.; Murphy, Jeremiah G.

2005-02-01

176

Constitutive relation and electromechanical stability of compressible dielectric elastomer  

NASA Astrophysics Data System (ADS)

The constitutive relation and electromechanical stability of Varga-Blatz-Ko-type compressible isotropic dielectric elastomer is investigated in this paper. Free-energy in any form, which consists of elastic strain energy and electric energy, can be applied to analyse the electromechanical stability of dielectric elastomer. The constitutive relation and stability is analyzed by applying a new kind of free energy model, which couples elastic strain energy, composed of Varga model as the volume conservative energy and Blatz-Ko model as the volume non-conservative energy, and electric field energy with constant permittivity. The ratio between principal planar stretches m(t0) (?2 = m(t0)?1), the ratio between thickness direction stretch and length direction stretch 0 n(t0) (?3 = n(t0)?1 ), and power exponent of the stretch k(t0) are defined to characterize the mechanical loading process and compressible behavior of dielectric elastomer. Along with the increase of material parameters m(t0) , n(t0) , k(t0) and poison ratioV , the nominal electric field peak is higher. This indicates that the dielectric elastomer electromechanical system is more stable. Inversely, with the increase of the material parameter ? , the nominal electric field peak, critical area strain and the critical thickness strain increase, coupling system is more stable.

Liu, Liwu; Liang, Xiangfeng; Yang, Kai; Wu, Chunxia; Liu, Zhongyu; Sun, Shouhua; Liu, Yanju; Leng, Jinsong

2011-03-01

177

A critical review on two types of Laghupanchamula.  

PubMed

A group of five roots of small plants i.e., Shalaparni, Prshniparni, Brhati, Kantakari and Gokshura or Eranda is known as Laghupanchamula under Mishraka Varga (group of drugs). It is used as such or with Mahat Panchamula i.e., Bilva, Gambhari, Shyonaka, Agnimantha and Patala, constituting Dashamula, a well recognized and popular Ayurvedic preparation or as an ingredient of different dosage forms. Classical texts of Ayurveda differs regarding components of this Mishraka Varga. Four out of five drugs of Laghupanchamula are similar in all the Ayurvedic texts, but either Gokshura or Eranda is considered as the fifth drug. So a comphrenesive review of Veda, Samhita Grantha, Cikitsa Grantha and Nighantus, with regards to synonyms, contents, Guna- Karma, origin of variation in contents and possible thought behind two kinds of Laghupanchamula, to throw light for rational use of either Eranda or Gokshura under Laghupanchamula was conducted. It was observed that both the traditions were in practice however Acharya Kashyapa and Ravigupta were in view of Eranda as a fifth drug of Laghupanchamula where as Acharya Charaka, Sushruta, Vagabhatta, Yogaratnakara and Chakradatta are in favour of Gokshura. Infact, the variation in content depends on the need i.e Dosha, Dushya and Vyadhi. PMID:23723639

Ghildiyal, Shivani; Joshi, Vinod Kumar

2012-07-01

178

ÍNDICES DE SÍTIOS PARA Hovenia dulcis Thunberg NA REGIÃO CENTRAL DO ESTADO DO RIO GRANDE DO SUL, BRASIL SITES INDEX FOR Hovenia dulcis Thunberg IN THE CENTRAL REGION OF THE STATE OF RIO GRANDE DO SUL, BRAZIL  

Microsoft Academic Search

The main objective of this work is to study the index forest sites build, for the dominant height, of populations located in the central area of the state of Rio Grande do Sul. To do that, information from 3 stands located at FEPAGRO was used. To construct the curves index sites forest, information from 18 dominant trees was collected in

Gerson Luiz Selle; Frederico Dimas Fleig; Elisabete Vuaden; Evaldo Muñoz Braz

2009-01-01

179

Revisión y estado de conservación de la flora briológica de la Sierra de Peña Sagra (Cordillera Cantábrica, España). Revision and conservation status of the bryological flora from Sierra de Peña Sagra (Cordillera Cantábrica, Spain  

Microsoft Academic Search

Se analiza el porcentaje de especies de briófitos amenazados del catálogo de la Sierra de Peña Sagra (Cantabria). Se aportan 4 nuevos taxones a la Lista Roja de Briófitos de la Península Ibérica: Anastrepta orcadensis, Plagiochila spinulosa, Orthotrichum consimile y Sphagnum brevifolium. Se plantea el cambio de categoría de amenaza de Bazzania tricrenata. Se propone la inclusión de esta zona

Gisela Oliván Martínez; Esther Fuertes Lasala; M. Acón

2003-01-01

180

Anthropically dislodged assemblages of sponges (Porifera: Demospongiae) in the River Araguaia at Araguatins, Tocantins State, Brazil Assembléias de esponjas desalojadas no Rio Araguaia em Araguatins, Estado do Tocantins, Brasil  

Microsoft Academic Search

A recent outbreak of an human ocular disease at Araguaia River by the town of Araguatins, TO, Central Amazonia, along the low water period of 2005 required pathological analyses of surgically extracted ocular tissues. Spicules which invest the gemmules of the freshwater sponges Drulia uruguayensis and D. ctenosclera were found inside these ocular materials. Such relation between an ocular disease

C. Volkmer-Ribeiro; Salvador França; Rodovia Washington Luís

181

Estado nutricional e carência de ferro em crianças freqüentadoras de creche antes e 15 meses após intervenção nutricional Nutritional status and iron deficiency among children enrolled in a day care center before and after 15 months of nutritional management  

Microsoft Academic Search

Objective: To compare the nutritional status and the preva- lence of iron deficiency among children enrolled in a day care center before and after 15 months of nutritional management. Methods: Cohort study of 52 children, aged 32 to 78 months, evaluated before and after treatment of anemia and nutritional disturbs in a no-profit day care center in Catan- duva, São

Terezinha Soares Biscegli; Carlos Elysio; C. Corrêa; João Romera; André Binotti Candido

2008-01-01

182

Integração de Dados Aerogeofísicos Gamaespectométricos e Altimétricos do SRTM (Shuttle Radar Topography Mission) a imagens do Sensor LANDSAT7 ETM+ utilizando-se a adição de bandas em RGB em área da Folha Garanhuns, Estado de Pernambuco, Nordeste Brasileiro  

Microsoft Academic Search

A methodology of data integration using aerogeophysical and altimetry data from STRM with the first Principal Component of LANDSAT 7 ETM+, applied in the area of Garanhuns Sheet (SC.24-X-B, 18.000 km2 in Northeastern Brazil), is the scope of this paper. This methodology has been developed to support the geological mapping of the area. A greater control concerning the STRM and

Carlos Eugênio da Silveira Arraes

183

CONTAMINACIÓN DE SUELOS CON HUEVOS DE Toxocara spp. (NEMATODA, ASCARIDIDA) EN PARQUES PÚBLICOS DE LA CIUDAD DE CORO, ESTADO FALCÓN, VENEZUELA. Soil Contamination With Toxocara spp. Eggs (Nematoda, Ascaridida) in Public Parks From Coro City, Falcon State, Venezuela  

Microsoft Academic Search

A descriptive and transversal survey to establish contamination with Toxocara spp. eggs of soils from 38 public parks of the city of Coro, Falcon State, Venezuela, was carried out between February-March 2004. The soil samples were parasitologically processed using the technique of flotation with NaCl (modified Willis-Molloy). Texture, salinity (electric conductivity) and pH of the soils were also analyzed. Toxocara

Dalmiro José Cazorla Perfetti; Pedro Morales Moreno; María Eugenia; Acosta Quintero

184

NUEVO FOCO DE INFECCIÓN DE Oxyspirura mansoni EN GALLOS DE PELEA DE MUNICIPIOS DEL ESTADO ZULIA, VENEZUELA. New Focal Infection of Oxyspirura mansoni in Gamecock of Municipalities of Zulia State, Venezuela  

Microsoft Academic Search

The purpose of this research was to determine the existence of the source of an Oxispirurosis infection which ethiological agent is a nematode known as Thelaziidae: Oxyspirura man- soni (Cobbold, 1869). This nematode is responsible of ocular filariosis of birds. This study is related with gamecock birds lo- cated in the following Municipalities: Maracaibo, San Fran- cisco, Jesus Enrique Lossada

Nelly M. de Chirinos; Angel R. Chirinos; Jorge Briceño; Marvin Molina

185

CORRELAÇÃO ENTRE AS CAPACIDADES FÍSICAS BÁSICAS E O ÍNDICE DE CAPACIDADE DE TRABALHO EM BOMBEIROS DO ESTADO DO RIO DE JANEIRO Correlation between basic physical capacities and the work capacity index in firefighters of the state of rio de janeiro  

Microsoft Academic Search

The purpose of this experiment was to investigate the basic physical characteristics of a military firefighter of Corpo de Bombeiro Militar do Rio de Janeiro (CBMRJ) and to correlate the physical fitness level with the work capacity index (WCI). Participants of this study were 14 military firefighters (33 ± 4 years; 179 ± 0.07 cm; 83.4 ± 11.6 kg) students

EDUCAÇÃO FÍSICA; Cristiano Marcelino; Roberto Simão; Raphael Guimarães; Belmiro Freitas de Salles; Juliano Spineti

2009-01-01

186

CARACTERIZACIÓN FÍSICA Y QUÍMICA DEL FRUTO DE CARDÓN DE DATO DE LOS MUNICIPIOS TORRES Y JIMÉNEZ, ESTADO LARA, VENEZUELA PHYSICAL AND CHEMICAL CHARACTERIZATION OF THE CACTI FRUITS OF THE MUNICIPALITY TORRES AND JIMENEZ, LARA STATE, VENEZUELA  

Microsoft Academic Search

SUMMARY In Lara state, the semiarid zones represent approximately 52% of the total territory. Among the xerophytes plants found in the area can be mentioned the cactus Lemaireo- cereus griseus (Haw) Britt & Rose. This plant is well adapted to soil and climate conditions. The fruits from this plant represents a source of feeding for local people and showed a

Yanira Terán; Ramón D'Aubeterre; María P. de Camacaro

2008-01-01

187

COMPOSICIÓN QUÍMICA del PASTO AGUJA (brachiaria humidìcola) SOMETIDA A PASTOREO EN UNA FINCA DEL MUNICIPIO GUANARE ESTADO PORTUGUESA Chemical composition of Brachiaria humidicola grazed into a farm in Guanare, Portuguesa state, Venezuela  

Microsoft Academic Search

In order to evaluate the chemical composition of Brachiaria humidicola in a farm of Guanare, Portuguesa state, eight samples were taken monthly by means of metallic frame (0.5 x 0.5), and dried off at 60 ºC during 48 h, for dry matter estimation. Each sample was divided in two components: (PI) the plant as a whole, (H) just leaves. Proximal

Adelis Arias; Helber Hernández

2002-01-01

188

ANÃLISIS DE RENTABILIDAD DE UN SISTEMA DE PRODUCCIÓN DE HONGO SETA BAJO CONDICIONES DE INVERNADERO, EN EL MUNICIPIO DE AMOZOC DE MOTA EN EL ESTADO DE PUEBLA  

Microsoft Academic Search

The profitability of a production system of oyster mushrooms was evaluated under conditions of greenhouse with a surface of 112 m2 located in San Salvador Chachapa, pertaining to the municipality of Amozoc de Mota in the state of Puebla. The indicators of economic evaluation were used: net present value (NPV), relation benefit-cost (B\\/C), relation net benefitinvestment (N\\/K) and internal rate

Omar Romero Arenas; J. Manuel Barrios Diaz; A. Macias Lopez; A. Simon Baez; A. Ibanez Martinez; F. Juarez Huerta

2009-01-01

189

Factors influencing tropical island freshwater fishes:Species, status, and management implications in puerto rico [Factores que influencian a los peces tropicales de agua dulce: Especies, estado actual e implicaciones para el manejo en Puerto Rico  

USGS Publications Warehouse

Anthropogenic effects including river regulation, watershed development, contamination, and fish introductions have substantially affected the majority of freshwater habitats in Europe and North America. This pattern of resource development and degradation is widespread in the tropics, and often little is known about the resources before they are lost. This article describes the freshwater resources of Puerto Rico and identifies factors that threaten conservation of native fishes. The fishes found in freshwater habitats of Puerto Rico represent a moderately diverse assemblage composed of 14 orders, 29 families, and 82 species. There are fewer than 10 species of native peripherally-freshwater fish that require a link to marine systems. Introductions of nonindigenous species have greatly expanded fish diversity in freshwater systems, and native estuarine and marine species (18 families) also commonly enter lowland rivers and brackish lagoons. Environmental alterations, including land use and development, stream channelization, pollution, and the impoundment of rivers, combined with nonnative species introductions threaten the health and sustainability of aquatic resources in Puerto Rico. Six principal areas for attention that are important influences on the current and future status of the freshwater fish resources of Puerto Rico are identified and discussed.

Wesley, Neal, J.; Lilyestrom, C. G.; Kwak, T. J.

2009-01-01

190

Estudos de Fraturamentos Para Pesquisa de Agua Subterranea No Estado de Sergipe COM Produtos de Sensoriamento Remoto (Study of Fracturing for Groundwater Research in the Sergipe State with Remote Sensing Products).  

National Technical Information Service (NTIS)

For groundwater prospecting in Sergipe Crystalline Complex, a systematic interpretation of the remote sensing data was conducted and enabled the delineation of some potential areas for groundwater exploration in the future. The method used includes the an...

O. Souzasampaio J. Tavaresdemattos P. Veneziani

1986-01-01

191

SUSCEPTIBILIDAD A INSECTICIDAS EN POBLACIONES DE Plutella xylostella (L.) (LEPIDOPTERA: PLUTELLIDAE) DEL ESTADO DE GUANAJUATO, MÉXICO SUSCEPTIBILITY TO INSECTICIDES IN POPULATIONS OF Plutella xylostella (L.) (LEPIDOPTERA: PLUTELLIDAE) FROM THE STATE OF GUANAJUATO, MÉXICO  

Microsoft Academic Search

Considering that Plutella xylostella (L.) is the most important pest of cruciferous crops in the State of Guanajuato, susceptibility of early third instar larvae of P. xylostella to emamectin benzoate, indoxacarb, fipronil, and spinosad was determined in three insect populations (North, West, and East) of the State of Guanajuato and in one susceptible population in the laboratory. The values of

Roberto Barrera-Urzúa; Rafael Bujanos-Muñiz; J. Concepción Rodríguez-Maciel; Gustavo Mora-Aguilera; Miguel Á. Martínez-Téllez; Centro de Investigación

192

Evolução do estado nutricional de crianças com mielomeningocele em período de três anos Tree-year period evolution of the nutritional condition of children with mielomeningocelis Evolución en tres años de la condición nutricional de niños con mielomeningocele  

Microsoft Academic Search

RESumo: O presente manuscrito teve o objetivo de descrever e classificar o perfil antropométrico, de forma longitudinal, de um grupo de crianças com mielomeningocele inserido em um programa especial de atividades físicas. Vinte e quatro crianças com mielomeningocele foram avaliada em três momentos, com intervalo de um ano entre os mesmos. Foram avaliados: peso, comprimento, e calculado o IMC (índice

Cynthia Müller Coelho; Elizabeth Miyeko Egashira; Regina Célia da Silva; Sandra Maria Lima Ribeiro

193

IMPACTO DE LA DENSIDAD DE GATUÑO (MIMOSA MONANCISTRA) EN LA MICROFLORA DE SUELOS DEL SEMIÁRIDO DEL ESTADO DE AGUASCALIENTES IMPACT OF THE DENSITY OF CATCLAW (MIMOSA MONANCISTRA) ON THE MICROFLORA OF SEMIARID SOILS FROM AGUASCALIENTES  

Microsoft Academic Search

SUMMARY The impact of different densities of a native shrub legume known as cat claw (Mimosa monancistra) was determine, over the abundance and activity of the microbial flora located in and out side the canopy. Such impact was determine by means of the carbon content of microbial biomass, total amount of microorganisms (bacteria, fungus and actinomycets) and the inorganic nitrogen

Jaime A. Félix-Herrán; María V. Angoa-Pérez; Rosalinda Serrato-Flores; Víctor Olalde-Portugal

2007-01-01

194

The effect of motor activity on improved memory and The effect of motor activity on improved memory and emotional well-being in elderly women. emotional well-being in elderly women. Influencia de la actividad motora en la mejora de la memoria y Influencia de la actividad motora en la mejora de la memoria y del estado de ánimo emocional de mujeres mayores. del estado de ánimo emocional de mujeres mayores  

Microsoft Academic Search

This study researches the effect of a wide range of different types of intervention (cognitive versus cognitive + motor versus non-intervention) on the memory and mental state of elderly women complaining of memory loss and leading a sedentary life. Subjects (N=102, 80% women, age M\\/SD = 76\\/5 years) were distributed randomly into the three treat- ment groups. The cognitive training

Carmen Requena Hernández; Marta Zubiaur González; Alberto Fernández Lucas; Tomas Ortiz Alonso

195

Política de incentivos governamentais na Paraíba- implicações sobre o desenvolvimento industrial e a geração de empregos (1988-2003)  

Microsoft Academic Search

Neste trabalho foi analisada a política de incentivos governamentais adotada pelo estado da Paraíba no período 1988-2003, como forma de se inserir no contexto da guerra fiscal. Verificou-se que a Paraíba foi um dos estados beneficiados pelo processo de desconcentração industrial verificado na economia brasileira, durante a década de 90 e início dos anos 2000, já que este Estado apresentou

Patrick Morais Brasil

196

A Report on CUR 2000: The Many Facets of Undergraduate Research  

NASA Astrophysics Data System (ADS)

The Eighth National Conference of the Council on Undergraduate Research, "The Many Facets of Undergraduate Research", was held at The College of Wooster in Wooster, Ohio, June 22-24, 2000. There were more than 600 participants. Conference co-chairs Charlotte Otto (University of Michigan-Dearborn) and Patricia DeWinstanley (Oberlin College), with College of Wooster local committee co-chairs Don Jacobs and Lori Bettison-Varga, assembled a variety of plenary sessions, workshops, poster sessions, and symposia to explore a rich array of themes. Institutionalization of undergraduate research, facility design and renovation, faculty development, funding opportunities, collaborative research, assessment of research activities, and interdisciplinary research were among the issues highlighted. More than 100 workshops given by 230 presenters provided opportunities for faculty and administrators to exchange ideas on undergraduate research and science education.

Karukstis, Kerry K.

2000-11-01

197

Time dependent density functional study of enhanced field emission from carbon nanotubes  

NASA Astrophysics Data System (ADS)

We have calculated the field emission current of carbon nanotubes in real-time and real-space using the Lagrange- function basis [1] combined with efficient time-propagating schemes. Experimental studies reported orders of magnitude increase of field emission current from Cesium deposited carbon nanotubes [2]. We have studied the increase of field emission current due to the deposition of different atoms (Cesium, Gold, Tungsten, etc.) on capped carbon nanotube tips. The theoretical results are in good agreement with the experimental findings. This work was supperted by NSF grant ECS 0622146. [1] K. Varga, Z. Zhang, and S. T. Pantelides, Phys. Rev. Lett. 93, 176403 (2004). [2] A. Wadhawan, R. E. Stallcup, and J. M. Perez, Appl. Phys. Lett., 78 108 (2001).

Driscoll, Joseph; Varga, Kalman

2008-03-01

198

Determination of the energy level of boron induced charge traps in Si/SiO2 systems by second harmonic generation  

NASA Astrophysics Data System (ADS)

Interfacial charge traps were characterized using second harmonic generation (SHG) in highly boron-doped Si/SiO2 systems. We propose the presence of B^- and B^+ ions in Si substrate and SiO2 respectively across the interface [1]. A two color pump-probe SHG experiment was performed to determine the energy level of the B^+ ion in the oxide. A threshold wavelength of 475 nm (2.61 eV) was found for single photon excitation of electrons from the Si valence band to fill B^+ charge traps in SiO2 [2]. This work was supported in part by DOE. [4pt] [1] H. Park and Y. Xu J. Qi, K. Varga, S. M. Weiss, B. R. Rogers, G. L"upke, N. Tolk, Appl. Phys. Lett. 95, 062102 (2009). [0pt] [2] To be published.

Park, Heungman; Qi, Jingbo; Xu, Ying; Varga, Kalman; Lüpke, Gunter; Tolk, Norman

2010-03-01

199

BEST UNIFORM RATIONAL APPROXIMATION OF \\vert x\\vert ON \\lbrack-1,\\,1\\rbrack  

NASA Astrophysics Data System (ADS)

We consider best rational approximants in the uniform norm to the function \\vert x\\vert on \\lbrack-1,\\,1\\rbrack. The main result is a proof of a conjecture by R. S. Varga, A. Ruttan, and A. J. Carpenter. They have conjectured that if E_{nn}(\\vert x\\vert,\\, \\lbrack-1,\\,1\\rbrack), n\\in\\mathbb{N}, denotes the error of the nth degree rational approximant, then \\displaystyle \\lim_{n\\to\\infty}e^{\\pi\\sqrt n}E_{nn}(\\vert x\\vert,\\, \\lbrack-1,\\,1\\rbrack)=8.This conjecture generalizes earlier results, among them most prominently results by D. J. Newman and by N. S. Vyacheslavov.

Shtal', G.

1993-02-01

200

LETTER TO THE EDITOR: The stability and structure of Li+Ps2 and Na+Ps2  

NASA Astrophysics Data System (ADS)

The fixed-core stochastic variational method has been used to demonstrate the existence of an electronically stable ground state for the Li+Ps2 and Na+Ps2 systems. The stability of Li+Ps2 has been indicated previously in an ab initio calculation by Varga, but the present estimate of the binding energy is much closer to convergence. The Li+Ps2 system has a binding energy of 0.013 149 Hartree and a 2icons/Journals/Common/gamma" ALT="gamma" ALIGN="TOP"/> annihilation rate of 3.86 × 109 s-1. The Na+Ps2 system has a binding energy of 0.005 736 Hartree and an annihilation rate of 4.02 × 109 s-1. Examination of the interparticle expectation values, correlation functions and the annihilation rates suggests that both of these systems can be best described as a Ps2 molecule weakly bound to an alkali atom cation.

Mitroy, J.; Ryzhikh, G. G.

1999-11-01

201

H -matrix theory vs. eigenvalue localization  

NASA Astrophysics Data System (ADS)

The eigenvalue localization problem is very closely related to the -matrix theory. The most elegant example of this relation is the equivalence between the Ger?gorin theorem and the theorem about nonsingularity of SDD (strictly diagonally dominant) matrices, which is a starting point for further beautiful results in the book of Varga [19]. Furthermore, the corresponding Ger?gorin-type theorem is equivalent to the statement that each matrix from a particular subclass of -matrices is nonsingular. Finally, the statement that all eigenvalues of a given matrix belong to minimal Ger?gorin set (defined in [19]) is equivalent to the statement that every -matrix is nonsingular. Since minimal Ger?gorin set remained unattainable, a lot of different Ger?gorin-type areas for eigenvalues has been developed recently. Along with them, a lot of new subclasses of -matrices were obtained. A survey of recent results in both areas, as well as their relationships, will be presented in this paper.

Cvetkovic, Ljiljana

2006-07-01

202

Critical metal phase at the Anderson metal-insulator transition with Kondo impurities  

NASA Astrophysics Data System (ADS)

It is well known that magnetic impurities can change the symmetry class of disordered metallic systems by breaking spin and time-reversal symmetry. At low temperature, these symmetries can be restored by Kondo screening. It is also known that at the Anderson metal-insulator transition, wave functions develop multifractal fluctuations with power-law correlations. Here, we consider the interplay of these two effects. We show that multifractal correlations open local pseudogaps at the Fermi energy at some random positions in space. When dilute magnetic impurities are at these locations, Kondo screening is strongly suppressed. When the exchange coupling J is smaller than a certain value J^*, the metal-insulator transition point extends to a critical region in the disorder strength parameter and to a band of critical states. The width of this critical region increases with a power of the concentration of magnetic impurities. [S. Kettemann, E. R. Mucciolo, and I. Varga, Phys. Rev. Lett. 103, 126401 (2009).

Mucciolo, Eduardo; Kettemann, Stefan; Varga, Imre

2010-03-01

203

Violent Star Formation in NGC 2363: Erratum  

NASA Astrophysics Data System (ADS)

In the paper "Violent Star Formation in NGC 2363" by Rosa M. Gonzalez- Delgado, Enrique Perez, Guillermo Tenorio-Tagle, Jose M. Vilchez, Elena Terlevich, Roberto Terlevich, Eduardo Telles, Jose M. Rodriguez-Espinosa, Miguel Mas-Hesse, Maria Luisa Garcia-Vargas, Angeles I. Diaz, Jordi Cepa, and Hector Castaneda (ApJ, 437,239 [1994)), there are three errors in Section 5.4. The Paschen discontinuity in knot A is (0.82 +/- 0.19) x 10^-16^ ergs s^-1^ cm^-2^ A^-1^, the coefficient in the formula in page 258 is 2.445 x 10^11^, and the units in the ordinate axis of Figure 16 are 10^-15^ ergs cm^-2^ s^-1^ A^-1^. These are typographical errors, and they do not affect the determination of the electron temperature using the Paschen jump and the discussion and conclusions in this paper.

Gonzalez-Delgado, Rosa M.; Perez, Enrique; Tenorio-Tagle, Guillermo; Vilchez, Jose M.; Terlevich, Elena; Terlevich, Roberto; Telles, Eduardo; Rodríguez Espinosa, Jose M.; Mas-Hesse, Miguel; Garcia-Vargas, Maria Luisa; Diaz, Angeles I.; Cepa, Jordi; Castaneda, Hector

1996-12-01

204

Møller Energy Momentum Complex in General Relativity for Higher Dimensional Universes  

NASA Astrophysics Data System (ADS)

Using the Møller energy momentum definition in general relativity (GR) we calculate the total energy momentum distribution associated with (n+2)-dimensional homogeneous and isotropic model of the universe. It is found that total energy of Møller is vanishing in (n+2) dimensions everywhere but n-momentum components of Møller in (n+2) dimensions are different from zero. Also, we evaluate the static Einstein Universe, FRW universe and de Sitter universe in four dimensions by using (n+2)-type metric, then calculate the Møller energy momentum distribution of these spacetimes. However, our results are consistent with the results of Banerjee and Sen, Xulu, Radinschi, Vargas, Cooperstock-Israelit, Aygün et al., Rosen, and Johri et al. in four dimensions.

Aygün, M.; Aygün, S.; Yilmaz, I.; Baysal, H.; Tarhan, I.

2007-07-01

205

Julio Cortázar quotes on normal and abnormal movements: magical realism or reality?  

PubMed

Together with Mario Vargas Llosa and Gabriel García Márquez, Julio Cortázar was one of the most representative authors of the Latin American magical realism genre. Within his extensive body of work, many descriptions of characters suffering physical disabilities, as well as situations suggesting such medical conditions, can be extracted. In this review, two short stories by Cortázar are presented. In the first one, the main character could easily be a man suffering from corticobasal degeneration; in the second, an old woman with symptoms suggestive of progressive supranuclear palsy is clearly depicted. Despite the fact that one of the main ingredients in Cortázar's magical realism is fiction, cases described here fit real medical conditions quite well, making it hard to believe that they represent purely fantastic descriptions rather than the product of Cortázar's inquisitive observation and the description of real patients. PMID:16685680

Merello, Marcelo

2006-08-01

206

Babies Born to Native High-Altitude Mothers Have Decreased Risk of Low Birth Weight  

NSDL National Science Digital Library

The study, ÃÂAugmented uterine artery blood flow and oxygen delivery protect Andeans from altitude-associated reductions in fetal growth.àwas done by Colleen Glyde Julian, Megan J. Wilson, Henry Yamashiro and Lorna G. Moore of the University of Colorado; Wilma Tellez, Armando Rodriguez and Enrique Vargas of Universidad Mayor de San Andrés, La Paz, Bolivia; Abigail Bigham and Mark Shriver of Pennsylvania State University; and Miriam Lopez of Clínica del Sur, La Paz, Bolivia. Dr. Yamashiro is also affiliated with Clinica Siraní, Santa Cruz de la Sierra, Bolivia and Dr. Moore is also affiliated with Wake Forest University, Winston-Salem, North Carolina.

APS Communications Office (American Physiological Society Communications Office)

2006-05-18

207

New Tactics in Human Rights  

NSDL National Science Digital Library

As this website explains in its Common Questions area, "Tactics consist of how to make a change", and given this statement, the site will be of great interest to those with a concern for international human rights. The New Tactics in Human Rights organization is primarily concerned with providing practitioners in the field with a package of practical tools, a worldwide symposium, and a number of other strategic planning resources. The project itself is coordinated by the Center for Victims of Torture and is overseen by a board of advisors that includes novelist Mario Vargas Llosa and the Right Honorable Kim Campbell, who is the former Prime Minister of Canada. The "Tools for Action" section is a real find as it contains a number of tactical notebooks taken from various case studies around the world, including work from Turkey, Hungary, Romania, and Albania. It is worth noting that many of the materials on the site are also available in Spanish and French.

208

Dynamic heterogeneity above and below the mode-coupling temperature  

NASA Astrophysics Data System (ADS)

We study the temperature dependence of the spatial extend of the dynamic heterogeneity in a soft sphere system near the so-called mode-coupling temperature Tc. We utilize a recently introduced procedureootnotetextE. Flenner and G. Szamel, Phys. Rev. Lett. 105, 217801 (2010) to calculate the ensemble independent dynamic susceptibility ?4(??) and the dynamic correlation length ?(??) at the alpha relaxation time ??. Above Tc, we find that ?4(??) ˜?(??)^3 and ?(??) ˜(??), which is the same behavior found in a binary hard-sphere system. We track these relationships below Tc to examine the recently reported non-monotonic temperature dependence of dynamic correlations found in the same systemootnotetextW. Kob, S. Roland-Vargas and L. Berthier, Nat. Phys. DOI:10.1038/NPHYS2133. Finally, we examine the relationship between dynamic susceptibilities that can be determined from experiments and the dynamic correlation length ?(??).

Flenner, Elijah; Szamel, Grzegorz

2012-02-01

209

Estimating the TNT equivalence of a 15-ton single base powder explosion through damaged building profiles analyses.  

PubMed

Back in 1964 President Vargas Works was the only place in the country which processed single base powder for the Brazilian Armed Forces. Then its industrial activity was quite strong and around 4:45 a.m. of 23rd September an intense decomposition of nearly 15 ton of that material took place in one of the production lines workshops. The consequences of this explosion were the destruction and extensive damage to the workshops around its epicenter. At that time pictures of all affected buildings were taken and their damages fully described. This led to the present work which consists in the evaluation of the TNT equivalent charge of the explosion using the concept of damage category developed by UK engineers based on the WWII damaging bombing data. PMID:18353550

Mendonça-Filho, L G; Bastos-Netto, D; Guirardello, R

2008-02-12

210

Microwave Spectra of Fluoroformyloxyl and Fluorosulfate Radicals  

NASA Astrophysics Data System (ADS)

Rotational spectra of fluoroformyloxyl (FCO_2) and fluorosulfate radicals (FSO_3) were studied in their ground states. The spectra measured involve fine structures due to a unpaired electron as well as hyperfine interaction features due to 19F nucleus that can give rise to an additional hyperfine doubling of levels. These radicals are of the atmospheric interest, for example the FCO_2 radical may be produced by stratospheric degradations of HCFCs and HFCs . Their atmospheric presence can be now supported by Eyjafjallajokull volcano massive eruptions of gasses and dust particles containing Fluor and Sulfur. Both the radicals were prepared by a pyrolysis of a suitable precursor directly in a sample cell. Besides the radical spectra, the majority of spectral lines in observed spectra belongs to other molecular species. Therefore the identification of the radical lines was simplified by using an external magnetic field affecting only the radical species by the molecular Zeeman effect. The radicals FCO_2 and FSO_3 were measured in the frequency regions 125 -242 GHz and 93 - 430 GHz, respectively. From obtained transition frequencies the set of rotational, centrifugal distortion, fine and hyperfine constants were calculated. The study of the fluorosulfate radical was performed in the Prague laboratory for the first time. L. Kolesniková, J. Varga, H. Beckers, M. Šimecková, Z. Zelinger, L. Nová St?íteská, P. Kania, H. Willner, and Š. Urban: Detailed study of fine and hyperfine structures in rotational spectra of the free fluoroformyloxyl radical FCO2, J. Chem. Phys. 128 (2008) 1-8. L. Kolesniková, J. Varga, L. Nová St?íteská, H. Beckers, H. Willner, F. Aubke, and Š. Urban: The Ground State Rotational Spectrum of the Fluorosulfate, J. Chem. Phys. 130 (2009) 18430.

Urban, S.; Varga, J.; Kolesniková, L.; Meltzerová, Z.; Uhlíková, T.; Koucký, J.; Kania, P.; Beckers, H.; Willner, H.

2010-06-01

211

Lessons in posttraumatic stress disorder from the past: Venezuela floods and Nairobi bombing.  

PubMed

Identification and treatment of posttraumatic stress disorder (PTSD) are important following a disaster. Insights into how these aims can be achieved may be obtained from previous disasters. This article describes mental health initiatives following the 1999 flooding in Vargas State, Venezuela, and the 1998 U.S. Embassy bombing in Nairobi, Kenya. Following the Vargas State floods, a specialist mental health center devoted to the diagnosis, treatment, and follow-up of PTSD was established. Awareness and acceptance of the clinic was promoted by media campaigns and community-based activities. After 18 months, approximately 5000 people had been screened, of whom 62% were diagnosed with PTSD and treated. Moreover, the clinic's activities had expanded to include treatment of other medical conditions and assistance with nonmedical needs. Following the Nairobi bombing, a mass media campaign was initiated to create awareness of PTSD symptoms and help victims come to terms with their experience. This campaign was found to be well received and helpful. In addition, counselors were trained to support people living or working close to the blast. These examples show that mental health initiatives are feasible after a disaster and highlight a number of issues: (1) The intervention should be tailored to the needs of the target population; (2) Communication should be simple and appropriate; (3) Community-based activities are valuable in promoting awareness and acceptance of mental health initiatives; (4) Reducing the stigma often associated with mental health problems is important; and (5) The mass media can be helpful in promoting awareness of mental health issues following major trauma. PMID:16602817

Carlos Otero, Juan; Njenga, Frank G

2006-01-01

212

AGRUPAMENTO DE MUNICÍPIOS DO PONTAL DO PARANAPANEMA, ESTADO DE SÃO PAULO, EM FUNÇÃO DE VARIÁVEIS RELACIONADAS À AGROPECUÁRIA rfiretti@apta.sp.gov.br Apresentação Oral-Desenvolvimento Rural, Territorial e regional RICARDO FIRETTI 1; VANDERLEI JOSÉ SEREIA 2; EDUARDO CARDOSO DE OLIVEIRA 3; ANTONIO ASSIZ DE CARVALHO FILHO 4. 1.APTA\\/SAA-SP, PRESIDENTE PRUDENTE - SP - BRASIL; 2.UEL, LONDRINA - PR - BRASIL; 3.AEDZO, PRESIDENTE PRUDENTE - SP - BRASIL; 4.FCT\\/UNESP, PRESIDENTE PRUDENTE - SP - BRASIL. AGRUPAMENTO DE MUNICÍPIOS DO PONTAL DO PARANAPANEMA , ESTADO DE SÃO PAULO, EM FUNÇÃO DE VARIÁVEIS RELACIONADAS À  

Microsoft Academic Search

Recognized in the State of São as one of the last f rontiers of development paulista, the Pontal do Par anapanema, has its main base in the agricultural economy, but needs to further diversify and increase technology. Order to support actions of public and private actors with r egard to rural development, this work had as main o bjective to

Ricardo Firetti; Vanderlei José Sereia; Eduardo Cardoso de Oliveira; Antônio Assiz de Carvalho

213

Domestic Determinants of Net U. S. Foreign Investment (Facteurs intérieurs déterminant l'investissement net étranger dans les comptes nationaux des Etats-Unis) (Factores determinantes internos de la inversión externa neta de Estados Unidos)  

Microsoft Academic Search

The current account balance known as net foreign investment in the national income and product accounts of the United States is largely determined by domestic factors that have changed the supply of national saving relative to the demand for domestic investment. Thus, the estimated rate of net foreign investment declined by almost half as much as the cyclically adjusted net

George M. Von Furstenberg

1980-01-01

214

Proyecto Curricular Sobre la Herencia Iberoamericana. Latinos en la Formacion de los Estados Unidos de American: Ayer, Hoy y Manana. Procedimientos de la Conferencia Sequnda Conferencia Anual del Panel Consultivo Internacional en Santillana del Mar, Espana (The Ibero-American Heritage Curriculum Project. Latinos in the Making of the United States of America: Yesterday, Today, and Tomorrow).  

ERIC Educational Resources Information Center

|The Ibero-American Heritage Curriculum Project is an interdisciplinary curriculum development project designed to integrate the study of Ibero-American heritage and culture into classroom instructional programs, kindergarten through grade 12. The project was initiated by the New York State Education Department and involves the Spanish National…

New York State Education Dept., Albany.

215

Frecuencia de Trichinella spiralis en sangre y músculo de equinos sacrifi cados en dos diferentes mataderos, uno de tipo industrial y otro de tipo rural en el Estado de México, México Frequency of Trichinella spiralis in blood and muscles of horses from two slaughter houses (industrial and rural) in the State of Mexico, Mexico  

Microsoft Academic Search

The objective of this study was the evaluation of the frequency of Trichinella spiralis in horse meat that is used for human and animal consumption. A total of 150 horses were sampled, from two private slaughterhouses, one industrial slaughterhouse with some level of technology and the other one rural with less technology. Seventy animals from the fi rst one and

Enedina Jiménez-Cardoso; María de Lourdes Caballero-García; Gabriel Uribe-Gutiérrez; Esmeralda Trejo-Hernández; Francisco Ramón Gay-Jiménez

216

Double-blind evaluation of transdermal nitroglycerine as adjuvant to oral morphine for cancer pain management 1 1 Sponsored by a financial grant from FAPESP (Fundação de Amparo à Pesquisa do Estado de São Paulo). Marcelo V Perez received a monthly grant from FAPESP during the realization of this paper  

Microsoft Academic Search

Study Objectives: To examine analgesia and adverse effects following transdermal application of nitroglycerine (a nitric oxide generator) combined with oral morphine, in cancer pain patients.Design: Randomized, double-blind study.Setting: Teaching hospital.Patients: 36 patients suffering from cancer pain.Interventions: Patients were divided into two groups (n = 18). All patients were regularly taking oral amitriptyline 50 mg at bedtime. Pain was evaluated using

Gabriela R Lauretti; Marcelo V Perez; Marlene P Reis; Newton L Pereira

2002-01-01

217

VIGOR JUVENIL EM PROGÊNIES DE ERVA-MATE (Ilex paraguariensis A. St.-Hil.) NATIVAS DO ESTADO DE MATO GROSSO DO SUL JUVENILE VIGOUR IN ERVA-MATE (Ilex paraguariensis A. St.-Hil.) NATURAL PROGENIES FROM MATO GROSSO DO SUL STATE  

Microsoft Academic Search

The objective of this paper was to estimate the parameters and genetic values for the traits height, diameter and survival of erva-mate progenies, in an initial development phase, for the establishment of a progeny test in the indian area Kaiowá and Guarani. Seeds from 30 parent trees were collected in Caarapó, MS. The half-sib progenies were established at the COMFLORA

Suzi Maggi Kras; Reginaldo Brito da Costa; Marcos Deon; Vilela de Resende

2007-01-01

218

Análisis de la Satisfacción con los Cuidados en Salud a Través del Cuestionario EORTC IN-PATSAT32 en Pacientes con Cáncer de Mama, Linfoma no Hodgkin y Cáncer ColoRectal en Diferentes Etapas Clínicas. Relación con las Características Socio-Demográficas, Estados Co-Mórbidos y Variables del Proceso de Atención en el Instituto Mexicano del Seguro Social  

Microsoft Academic Search

IntroductionIn Mexico cancer is a public health burden. Nowadays the health care systems pay special attention to patient's perception and satisfaction of the health care received. Satisfaction with quality of health care has an impact in the adherence to the treatment.

Luz-Ma-Adriana Balderas-Peña; Daniel Sat-Muñoz; Iris Contreras-Hernández; Pedro Solano-Murillo; Guillermo-Allan Hernández-Chávez; Ignacio Mariscal-Ramírez; Martha Lomelí-García; Margarita-Arimatea Díaz-Cortés; Joaquín-Federico Mould-Quevedo; Juan-Manuel Castro-Cervantes; Oscar-Miguel Garcés-Ruiz; Gilberto Morgan-Villela

2011-01-01

219

FishTraits: A database of ecological and life-history traits of freshwater fishes of the United States [FishTraits: Base de datos de caracter??sticas ecol??gicas y de historia de vida de peces dulceacu??colas en los Estados Unidos de Norteam??rica  

USGS Publications Warehouse

The need for integrated and widely accessible sources of species traits data to facilitate studies of ecology, conservation, and management has motivated development of traits databases for various taxa. In spite of the increasing number of traitsbased analyses of freshwater fishes in the United States, no consolidated database of traits of this group exists publicly, and much useful information on these species is documented only in obscure sources. The largely inaccessible and unconsolidated traits information makes large-scale analysis involving many fishes and/or traits particularly challenging. We have compiled a database of > 100 traits for 809 (731 native and 78 nonnative) fish species found in freshwaters of the conterminous United States, including 37 native families and 145 native genera. The database, named FishTraits, contains information on four major categories of traits: (1) trophic ecology; (2) body size, reproductive ecology, and life history; (3) habitat preferences; and (4) salinity and temperature tolerances. Information on geographic distribution and conservation status was also compiled. The database enhances many opportunities for conducting research on fish species traits and constitutes the first step toward establishing a central repository for a continually expanding set of traits of North American fishes.

Frimpong, E. A.; Angermeier, P. L.

2009-01-01

220

The Cost of Trade Restraints: The Case of Japanese Automobile Exports to the United States (Le coût des obstacles au commerce: étude du cas des exportations d'automobiles japonaises aux Etats-Unis) (El costo de las limitaciones del comercio: El caso de la exportación de automóviles japoneses a los Estados Unidos)  

Microsoft Academic Search

This paper assesses the extent to which restraints on exports of Japanese automobiles to the United States affected car sales and prices in the period 1981-84. The estimates are obtained using a model of the U.S. automobile sector that explicitly allows for the effects of the quotas on the average quality of cars purchased. By distinguishing between pure price effects

Charles Collyns; Steven Dunaway

1987-01-01

221

Palabras del Secretario de Educacion Publica en la reunion anual de directores de education federal e inspectores generales en los estados que se rigen por el calendario "A". (Address by the Minister of Education at the Annual Meeting of Directors of Federal Education and Inspectors General in Calendar "A" States).  

ERIC Educational Resources Information Center

|This document is an English-language abstract (approximately 1,500 words) of a speech by the Mexican Minister of Education at an annual educators meeting. The Minister dealt with the administration and quality of education, the role of the directors and the duties towards them of the inspectors, and the main features of the reform of national…

Yanez, Agustin

222

Caracteristicas DA Drenagem Determinadas Em Fotografias Aerease Do Relevo Determinadas Em Cartas Planialtimetricas de Escalas Diferentes Para Tres Solos Do Estado de Sao Paulo (Characteristics of Drainage Determinations in Aerial Photographs and Relief Determination on Different Scales Planialtimetric Charts for Three Soils in the State of Sao Paulo).  

National Technical Information Service (NTIS)

Based on the interpretation of vertical aerial photographs on a 1:35,000 scale, the characterization was made of the drainage standards from three different soils of the State of Sao Paulo (red-yellow latosol, red-yellow podzol, and litosol) and the varia...

R. Angulofilho V. A. Demetrio G. V. Defranca

1986-01-01

223

Welfare recipients’ quality of life: lessons from the United Nations’ Human Development Index for the US welfare policy La calidad de vida de las beneficiarias del bienestar social: lecciones del Indice de Desarrollo Humano (IDH) de las Naciones Unidas para la política de bienestar social de los Estados Unidos de América  

Microsoft Academic Search

This article is part of a study on single mothers who were welfare recipients in Georgia, US (n?=?53,323) in the year 2000 which used the Human Development Index (HDI) to measure their quality of life (QOL) and that of the overall Georgia population by race. The United Nations created the HDI in 1990 to compare QOL across nations, but the

Mónica M. Alzate

2006-01-01

224

Nível de atividade física da população do Estado de São Paulo: análise de acordo com o gênero, idade, nível socioeconômico, distribuição geográfica e de conhecimento Physical activity level of São Paulo State population: an analysis based on gender, age, socio-economic status, demographics and knowledge  

Microsoft Academic Search

Physical inactivity has assumed the highest prevalence among cardiovascular risk factors. This phenomenon is even worse in the developing countries. Considering the relevance of this problem, we aimed to assess the São Paulo State physical activity level. 2001 people aged from 14 to 77 years old were interviewed (953 males and 1048 females) on July, 2002, referring to a sample

Sandra Mahecha Matsudo; Victor Rodrigues Matsudo; Timoteo Araújo; Douglas Andrade; Erinaldo Andrade; Luis Oliveira; Glaucia Braggion

225

La flor y el fruto de la salud, la virtud y la felicidad: Lo interno transformado en externo en la enseñanza de la música en las escuelas públicas de los Estados Unidos desde décadas tempranas hasta el presente * The Flower and Fruit of Health, Virtue, and Happiness: Inwardness Turned Outward in American Public School Music Instruction from the Early Decades to the Present  

Microsoft Academic Search

In this article, I analyze several of the key systems of reasoning that are embodied in several eras of music documents. Starting from these texts and reading across cultural practices that touched the curriculum, the analysis considers ideals and codes of behavior as systems of knowledge that fabricate who the learner is and what the substance of the lessons should

Ruth Gustafson

2007-01-01

226

RESUMEN DE TESIS DOCTORAL Reconstrucción de Parámetros y Variables de Estado para una Clase de Sistemas Caóticos con Aplicación en Codificación y Decodificación de Información Parameter and State Variable Reconstruction for a Class of Chaotic with Application to Information Codification and De-codification  

Microsoft Academic Search

In this paper we describe how to use exact state and parametric integral equations re-constructors for the identification of the state variables of dynamic chaotic discrete and continuous non-lineal systems. In both cases, we avoid the use of asymptotic observers and Takens Theorem. Identification and reconstruction of discrete systems is illustrated with Lozi's system. The state reconstruction schema for discrete

Miguel Santiago; Suárez Castañón; Carlos Fernando Aguilar Ibáñez

2005-01-01

227

Photometric properties of stars clusters with young or mixed age stellar populations  

NASA Astrophysics Data System (ADS)

The main goal of this work is to present and discuss the synthetic photometrical properties of stellar clusters resulting from the PopStar code. Colors in Johnson and SDSS systems, H? and H? luminosities and equivalent widths, and ionizing region size, have been computed for a wide range of metallicities Z = 0.0001, 0.0004, 0.004,0.008,0.02 and 0.05, and ages, from 0.1 Myr to 20 Gyr in Mollá, Garc{í}a-Vargas, & Bressan (2009, MNRAS, 398, 451). Emission lines are shown in Mart{í}n-Manj{ó}n et al. (2010, MNRAS, 403, 2012). Now we calculate colors with the emission lines contribution to the broad band color, so colors include stellar and nebular components, plus the emission lines following the evolution of the cluster and the region geometry in a consistent way. We compare the Single Stellar Populations contaminated and uncontaminated colors (in both Johnson and SDSS systems) and show the importance of emission lines contribution when photometry is used as a tool to characterize stellar populations. With these models we may determine the physical properties of young ionizing clusters when only photometrical observations are available and these correspond to the isolated star forming regions, subtracted the contribution of the underlying population In most cases, however, the ionizing population is usually embedded in a large and complex system, and the observed photometrical properties are the result of the combination of both the young star-forming burst and the host-underlying older population. The second objective of our work is therefore to provide a grid of models for nearby galaxies able to interpret mixed regions where the separation of young and old population is not possible or reliable enough. We obtain a set of PopStar Spectral Energy Distributions (available at PopStar site and also in VO) and derived colors for mixed populations where an underlying host population is combined in different mass ratios with a recent, metal-rich ionizing burst. These colors, together with other photometrical parameters, like H? radius of the ionized region, and Balmer lines equivalent width and luminosity allow to infer the physical properties of star-forming regions without any spectroscopic information. For details and a complete set of tables and figures see Mollá, García-Vargas, & Martín-Manjón (2012, MNRAS, submitted).

Mollá, M.; García-Vargas, M. L.; Martín-Manjón, M. L.

2013-05-01

228

Vale a pena desarmar? Uma avaliação do impacto da campanha de entrega voluntária de armas sobre as mortes com armas de fogo  

Microsoft Academic Search

Resumo O objetivo deste trabalho foi avaliar o impacto da campanha de entrega de armas (política de buy-back) sobre a incidência de óbitos com armas de fogo no Estado do Paraná. Visto que neste estado esta campanha teve início seis meses antes da campanha nacional, foi possível utilizar o estimador de diferenças em diferenças, em que os municípios paranaenses constituíram

Milena Karla Soares; Luiz Guilherme Dácar Da Silva Scorzafave

2008-01-01

229

La presencia de China en América Latina. Un tema controvertido  

Microsoft Academic Search

El autor analiza la presencia de la República Popular China en América Latina y sus repercusiones para la seguridad nacional de los Estados Unidos en la última década. Al sostener que actualmente la RPC no amenaza los intereses vitales de Estados Unidos en su patio trasero, el autor toma en cuenta el diálogo estratégico sino-estadounidense, la seguridad nacional de la

Peter M. Lewis

2007-01-01

230

Economia Política de Petróleo e Gás: A Experiência Russa  

Microsoft Academic Search

A recuperação do poder central da Rússia no governo Putin com uma estratégia de desenvolvimento nacional foi o ponto de partida para uma revisão da política do Estado diante do setor de energia. O governo aumentou drasticamente a presença do Estado no setor de energia, e chegou a controlar, no final de 2007, 47% dos ativos, contra menos de 10%

Giorgio Romano Schutte

2010-01-01

231

España, entre Europa y América: un ensayo interpretativo  

Microsoft Academic Search

Este último artículo del dossier presenta algunas hipótesis de interpretación sobre la historia de la política exterior española durante el siglo xx.Los elementos centrales son la relación entre España y el resto de los Estados continentales; la imagen de las instituciones europeas; los sentimientos encontrados hacia Estados Unidos, su política y su sociedad; y las cambiantes percepciones, estrategias e intereses

Florentino Portero

2003-01-01

232

EVOLUÇÃO DAS EXPORTAÇÕES, COMÉRCIO INTRASETORIAL E IMPACTOS AMBIENTAIS DOS NEGÓCIOS INTERNACIONAIS DE MADEIREIRA BRASILEIRA  

Microsoft Academic Search

O Brasil é importante exportador de madeira do mundo, tendo como principais mercados de destino os Estados Unidos e a União Européia. Desse modo, nesse estudo pretende-se estimar as equações de oferta e demanda por exportação madeireira do Brasil para os Estados Unidos e a União Européia; identificar as fontes de comércio madeireiro do Brasil nos seus principais mercados de

Rachel Silva Almeida; Rosemeiry Melo Carvalho; Ruben Dario Mayorga Mera

2008-01-01

233

Tratamiento nutricional de los síndromes colestáticos en la infancia  

Microsoft Academic Search

ResumenLa hepatopatía colestática causa un riesgo serio de desnutrición, que incluye la desnutrición de proteína y energía y las carencias nutricionales específicas. El estado nutricional puede evaluarse basándose en mediciones antropométricas, que pueden ser equívocas a causa de la ascitis y el edema periférico. Las determinaciones bioquímicas del estado de las vitaminas liposolubles son importantes para evaluar las necesidades de

Piotr Socha

2008-01-01

234

Introduction to Cleft and Craniofacial Team Care  

MedlinePLUS

... los Estados Unidos, alfabéticamente por estado ) A – C – D – F – G – H – I – K – L – M – N – O – P – R – S – T – U – V – W International Team Listings alphabetically by Country ( Equipos internacionales, alfabéticamente por país ) A – B – C – D – F – G – I – J – K – M – N – P – S – T – U Before ...

235

Role of Ngamma-acetyldiaminobutyrate as an enzyme stabilizer and an intermediate in the biosynthesis of hydroxyectoine.  

PubMed

Strain CHR63 is a salt-sensitive mutant of the moderately halophilic wild-type strain Halomonas elongata DSM 3043 that is affected in the ectoine synthase gene (ectC). This strain accumulates large amounts of Ngamma-acetyldiaminobutyrate (NADA), the precursor of ectoine (D. Cánovas, C. Vargas, F. Iglesias-Guerra, L. N. Csonka, D. Rhodes, A. Ventosa, and J. J. Nieto, J. Biol. Chem. 272:25794-25801, 1997). Hydroxyectoine, ectoine, and glucosylglycerate were also identified by nuclear magnetic resonance (NMR) as cytoplasmic organic solutes in this mutant. Accumulation of NADA, hydroxyectoine, and ectoine was osmoregulated, whereas the levels of glucosylglycerate decreased at higher salinities. The effect of the growth stage on the accumulation of solutes was also investigated. NADA was purified from strain CHR63 and was shown to protect the thermolabile enzyme rabbit muscle lactate dehydrogenase against thermal inactivation. The stabilizing effect of NADA was greater than the stabilizing effect of ectoine or potassium diaminobutyrate. A (1)H NMR analysis of the solutes accumulated by the wild-type strain and mutants CHR62 (ectA::Tn1732) and CHR63 (ectC::Tn1732) indicated that H. elongata can synthesize hydroxyectoine by two different pathways-directly from ectoine or via an alternative pathway that converts NADA into hydroxyectoine without the involvement of ectoine. PMID:10473374

Cánovas, D; Borges, N; Vargas, C; Ventosa, A; Nieto, J J; Santos, H

1999-09-01

236

Role of N?-Acetyldiaminobutyrate as an Enzyme Stabilizer and an Intermediate in the Biosynthesis of Hydroxyectoine  

PubMed Central

Strain CHR63 is a salt-sensitive mutant of the moderately halophilic wild-type strain Halomonas elongata DSM 3043 that is affected in the ectoine synthase gene (ectC). This strain accumulates large amounts of N?-acetyldiaminobutyrate (NADA), the precursor of ectoine (D. Cánovas, C. Vargas, F. Iglesias-Guerra, L. N. Csonka, D. Rhodes, A. Ventosa, and J. J. Nieto, J. Biol. Chem. 272:25794–25801, 1997). Hydroxyectoine, ectoine, and glucosylglycerate were also identified by nuclear magnetic resonance (NMR) as cytoplasmic organic solutes in this mutant. Accumulation of NADA, hydroxyectoine, and ectoine was osmoregulated, whereas the levels of glucosylglycerate decreased at higher salinities. The effect of the growth stage on the accumulation of solutes was also investigated. NADA was purified from strain CHR63 and was shown to protect the thermolabile enzyme rabbit muscle lactate dehydrogenase against thermal inactivation. The stabilizing effect of NADA was greater than the stabilizing effect of ectoine or potassium diaminobutyrate. A 1H NMR analysis of the solutes accumulated by the wild-type strain and mutants CHR62 (ectA::Tn1732) and CHR63 (ectC::Tn1732) indicated that H. elongata can synthesize hydroxyectoine by two different pathways—directly from ectoine or via an alternative pathway that converts NADA into hydroxyectoine without the involvement of ectoine.

Canovas, David; Borges, Nuno; Vargas, Carmen; Ventosa, Antonio; Nieto, Joaquin J.; Santos, Helena

1999-01-01

237

Study of spin-orbit resolved angular distribution components of Xe 5p.  

NASA Astrophysics Data System (ADS)

The role of relativistic effects and interchannel coupling for spin-orbit resolved mainlines has been described successfully with the relativistic random phase approximation (RRPA) for photoemission experiments within the dipole approximation. Nondipole photoemission experiments near the Xe 4p thresholds hold a new challenge for theory especially for the Xe 5p photolines. Angular distribution parameters ? and ? = 3?+? for the xenon 5p1/2 and 5p3/2 photoelectrons have been measured at the Advanced Light Source in the 80--220 eV photonenergy range. The results are compared with RRPA calculations [1] and experimental data [2]. Even though both experimental data sets agree well with theory for the dipole parameter ? both sets of experimental results show a fairly large disagreement with RRPA calculations [1] for the nondipole results. More interestingly, both experimental data sets do not agree with each other. This shows that there are still open questions that need to be addressed by experimenters and theorists. [1] W.R. Johnson and K.T. Cheng, Phys. Rev. A 63, 022504 (2001). [2] R. Sankari, S. Ricz, A. Kover, M. Jurvansuu, D. Varga, J. Nikkinen, T. Ricsoka, H. Aksela, and S. Aksela Phys. Rev. A 69, 012707 (2004).

Hemmers, O.; Guillemin, R.; Rolles, D.; Wolska, A.; Yu, S. W.; Lindle, D. W.; Manson, S. T.

2005-05-01

238

Orthopositronium scattering off H and He  

NASA Astrophysics Data System (ADS)

Exploiting an approach similar to the R-matrix theory, the diffusion Monte Carlo method is employed to compute phase shifts and threshold cross sections for the elastic scattering of positronium off light atoms. We briefly review the main ideas behind the use of quantum Monte Carlo techniques in scattering problems and, as applications, we present results for Ps-H and Ps-He. We find scattering lengths of 4.375(34) and 2.228(50) a.u. for the singlet and the triplet states of Ps-H, and of 1.4046(6) a.u. for Ps-He. A discussion of the agreement with other recent estimates for the same quantities is included. In particular, the scattering length for the Ps-H singlet agrees within 1% with the stochastic variational minimization (SVM) estimate by Ivanov, Varga, and Mitroy [Phys. Rev. A 65, 32703 (2002)] and the R-matrix one by Blackwood, McAlinden, and Walter [Phys. Rev. A 65, 32517 (2002)]. The Ps-H triplet scattering length, which still shows good agreement (1%) with the SVM one, appears to be 10% larger than the R-matrix value. As far as Ps-He is concerned, the calculation has been performed in a fully many-body framework. Comparison of the diffusion Monte Carlo scattering length with other estimates allows us to qualitatively and quantitatively assess the degree of approximation involved in other approaches.

Chiesa, Simone; Mella, Massimo; Morosi, Gabriele

2002-10-01

239

A WKB analysis of the buckling condition for a cylindrical shell of arbitrary thickness subjected to an external pressure  

NASA Astrophysics Data System (ADS)

We consider the plane-strain buckling of a cylindrical shell of arbitrary thickness which is made of a Varga material and is subjected to an external hydrostatic pressure on its outer surface. The WKB method is used to solve the eigenvalue problem that results from the linear bifurcation analysisE We show that the circular cross-section buckles into a non-circular shape at a value of {micro}1 which depends on A1/A2 and a mode number, where A1 and A2 are the undeformed inner and outer radii, and {micro}1 is the ratio of the deformed inner radius to A1. In the large mode number limit, we find that the dependence of {micro}1 on A1/A2 has a boundary layer structure: it is constant over almost the entire region of 0 < A1/A2 < 1 and decreases sharply from this constant value to unity as A1/A2 tends to unity. Our asymptotic results for A1 - 1 = O(1) and A1 - 1 = O(1/n) are shown to agree with the numerical results obtained by using the compound matrix method.

Sanjarani Pour, M.

2005-02-01

240

Atomization of Non-Newtonian Liquids by a High Momentum Coaxial Gas Jet. Stability Analysis, Modelling and Experimental Validation  

NASA Astrophysics Data System (ADS)

The atomization of a liquid jet by a co-flowing, high-speed gas has been studied for non-Newtonian polymer solutions. In this study, the R-T model originally developed by Varga et al. (2003) is extended to viscous and non-Newtonian fluids by applying the general dispersion relation developed by Joseph et al. (2002). When viscous effects are negligible the maximum amplification wavenumber is k?=?a ?l/(3?). On the contrary, when viscous effects are dominant, the wavenumber for maximum amplification can be approximated by k?=?[3]a ?l^2/?l^2. If the effects of surface tension and viscosity are assumed to be additive, the resulting R-T instability wavelength can be estimated as ?RT= 2 ?(?3 ?/ (a ?l) + C2?[3]?l^2/(a ?l^2)). The model obtained from the theoretical analysis has been validated from droplet diameter measurements of the atomization of six different liquids under a wide range of experimental conditions. The diameter and axial velocity of the liquid droplets was measured by Phase Doppler Particle Analyzer.

Aliseda, Alberto; Hopfinger, Emil; Kremer, Douglas M.; Berchielli, Alfred; Connolly, Emilia K.; Lasheras, Juan C.

2007-11-01

241

Successive overrelaxation (SOR) and related methods  

NASA Astrophysics Data System (ADS)

Covering the last half of the 20th century, we present some of the basic and well-known results for the SOR theory and related methods as well as some that are not as well known. Most of the earlier results can be found in the excellent books by Varga (Matrix Iterative Analysis, Prentice-Hall, Englewood Cliffs, NJ, 1962) Young (Iterative Solution of Large Linear systems, Academic Press, New York, 1971) and Berman and Plemmons (Nonnegative Matrices in the Mathematical Sciences, SIAM, Philadelphia, PA, 1994) while some of the most recent ones are given in the bibliography of this paper. In this survey, both the point and the block SOR methods are considered for the solution of a linear system of the form Ax=b, where and Some general results concerning the SOR and related methods are given and also some more specific ones in cases where A happens to possess some further property, e.g., positive definiteness, L-, M-, H-matrix property, p-cyclic consistently ordered property etc.

Hadjidimos, A.

2000-11-01

242

Excited, Resonant, and Unnatural Parity States of Positronic Atoms and Ions  

NASA Astrophysics Data System (ADS)

Calculations have demonstrated that 11 neutral atoms can bind positrons. We report on configuration interaction (CI) calculations that have demonstrated the existence of a ^2P^o excited state of e^+Ca, which consists predominantly of a positronium (Ps) cluster orbiting the Ca^+ ion in the L=1 partial wave [1]. This raises the possibility of detecting the formation of positronic bound states by an optical transition to the ground (^2S^e) e^+Ca state. The e^+Mg system is shown to lack an equivalent excited state, however, by extracting phase shifts from CI pseudostate energy shifts, we show that the system has a low-energy p shape resonance [2]. Finally, CI and stochastic variational method calculations of annihilation suppressed, unnatural parity ^2,4S^o, states of PsH, LiPs, NaPs and KPs are reported [3,4]. The LiPs system being Borromean in nature. [1] M.W.J.Bromley and J.Mitroy Phys. Rev. Lett. 97 183402 (2006) [2] J.Mitroy and M.W.J.Bromley Phys. Rev. (under review)[3] J.Mitroy and M.W.J.Bromley Phys. Rev. Lett. (in press)[4] M.W.J.Bromley, J.Mitroy and K.Varga Phys. Rev. A (in preparation)

Bromley, Michael W. J.; Mitroy, Jim; Varga, Kalman

2007-06-01

243

Intrinsic free carrier mobility of quantum wells in polar materials  

NASA Astrophysics Data System (ADS)

The intrinsic mobility of AlGaN/GaN quantum wells is numerically computed, assuming that it results from the free carrier scattering by the natural plasmon and/or phonon hybrid modes initially introduced by Varga and which self-consistently issue from the full dielectric response of the material. We first develop a physical approach (i) which allows us to find back in a simple way the transition probability which was initially obtained for three-dimensional systems by Kim in the frame of the second quantization formalism and (ii) which allows us to easily extend this formalism to the case of multi subband quantum wells. Then, the full two-dimensional dielectric function and its corresponding scattering potential is numerically computed, allowing us to predict the order of magnitude that can be expected for the low-field intrinsic mobility versus free carrier density in triangular quantum wells. We finally compare this scattering mechanism with the usual extrinsic scattering mechanisms associated with impurities, dislocations, and interface roughness.

Farvacque, J.-L.; Carosella, F.

2005-09-01

244

End-point energies of electrons ejected during Auger neutralization of slow, multicharged ions near metal surfaces  

NASA Astrophysics Data System (ADS)

A study has been done of the end-point energies of electrons ejected during Auger neutralization of slow, multicharged ions near metal surfaces. The study includes a wide variety of ions. Experimental results are presented for Alz+ and Cn+ ions incident on a gold surface, where z=2-5 and n=2-5. Ions from a laser-ion source are processed to produce ion pulses with incident energies ranging from 40 to 280 eV/charge. Data published by Hagstrum for 200-eV He2+, Nen+, Arn+, Krn+, and Xen+, on tungsten, where n=2 and 3, are analyzed along with the work of Varga, Hofer, and Winter for low-energy Ne2+, Ar2+, Ar3+, Kr2+, and Xe2+ on tungsten. It is concluded that the high-energy end of the Auger emission is dominated by single-electron capture by the ion and an internal conversion process involving direct coupling of optically allowed transitions in the lower-lying excited states of the singly neutralized ion to the top of the conduction band of the metal target. It is shown that a considerable fraction of the neonlike Al3+ ions from the laser-ion source are in a metastable state and are neutralized through autoionization.

Hughes, R. H.; Wattuhewa, Garvin; Miller, R. D.; Ye, X. M.; Pederson, D. O.

1987-12-01

245

Stochastic Variational Method for Atomic Gases  

NASA Astrophysics Data System (ADS)

We have applied the stochastic variational method [1] to trapped cold gases and calculated energies, densities, correlation functions and condensate fractions as function of scattering length and particle number [2]. We also investigated the N-body Efimov effect for systems with N=3, 4, 5, 6, and 7 bosons at infinite scattering length and obtained the characteristic exponential scaling factors for the energies and densities [3]. We have also compared the finite-range three-body model with the zero-range model [4] and determined the validity region of, and the effective range corrections to, the latter.[1] H.H. Sorensen, D.V. Fedorov and A.S. Jensen, AIP Conference Proc. 777 (2005) 12; K. Varga and Y. Suzuki, Comput. Phys. Commun. 106 (1997) 157.[2] M. Thøgersen, D.V. Fedorov and A.S. Jensen, Europhys. Lett. 79 (2007) 40002.[3] M. Thøgersen, D.V. Fedorov and A.S. Jensen, submitted to Europhys. Lett.[4] E. Braaten and H.-W. Hammer, Phys. Rep. 428 (2006) 259; T. Kraemer et al., Nature 440 (2006) 315.

Thøgersen, Martin; Fedorov, Dmitri; Jensen, Aksel

2008-05-01

246

Towards a hyperspherical description of positronium-positronium scattering  

NASA Astrophysics Data System (ADS)

The interest in the scattering properties of the positronium (Ps) has grown with the possibility of creating a Bose-Einstein condensate of matter-antimatter. Such an experimental realization would not only permit an exploration of quantum effects at macroscopic temperatures, but it would also contribute to our understanding of the relationship between the Ps2 molecule and more conventional molecules like H2. A deep understanding of positronium's collisional properties is crucial for cooling techniques and for the realization of a Bose-Einstein condensate. A hyperspherical analysis of this four-body system with two electrons and two positrons allow us not only to benchmark calculations of the Ps-Ps scattering length which have been previously studied (see e.g. Ref. [1]) but also to analyze recombination processes such as Ps+e+e^+ -> Ps+Ps or Ps^- + e^+, etc... We extend previous implementations of the correlated Gaussian hyperspherical method [2] to describe four-body systems with Coulomb interactions. The results from this hyperspherical analysis are compared with previous studies and correlated Gaussian calculations. [4pt] [1] I. A. Ivanov, J. Mitroy, and K. Varga. Phys. Rev. A 65, 022704 (2002)[0pt] [2] J. von Stecher and C.H. Greene. Phys. Rev. A 80, 22504(2009)

von Stecher, Javier; Greene, Chris H.

2012-06-01

247

The Surface Science of Metal Oxides: A Step Towards More 'Realistic' Model Systems  

NASA Astrophysics Data System (ADS)

Surface science has developed at a rapid pace over the past thirty years. The tools available to surface scientists, foremost the atomic probe microscopes, allow fundamental studies on the atomic level with unprecedented detail and beautiful insights. In recent years, there has been a push towards understanding more 'realistic' model systems, beyond single crystalline elemental semiconductor or metal surfaces. Our research group is predominantly interested in surface science investigations of metal oxide materials. One particularly well-studied system, the (110) surface of rutile titanium dioxide, will be discussed in this talk. Although a large body of work on the physics and chemistry of this material has been published,(V.E. Henrich and P.A. Cox, The Surface Science of Metal Oxides, Cambridge University Press 1994) very basic questions, such as: What is actually imaged with a scanning tunneling microscope? (U. Diebold, J.F. Anderson, K.-O. Ng, and D. Vanderbilt PRL 77 (7) (1996) 1322-1325) and: How do common surface preparation procedures affect surface morphology? (M. Li, W. Hebenstreit and U. Diebold Surf. Sci. Lett. 414 (1/2) (1998) L951-9) have been addressed only recently. Answering these questions allows insights into the very unusual adsorption behavior of chlorine molecules,(U. Diebold, G. Leonardelli, W. Hebenstreit, M. Schmid and P. Varga PRL 81 (2) (1998) 405-408) and the encapsulation of deposited group-VIII metals that occurs upon heating TiO2 to high temperatures in a reducing atmosphere.

Diebold, Ulrike

1998-11-01

248

Transport properties and stability of molecular break junctions  

NASA Astrophysics Data System (ADS)

The electrode-molecule interface in a break junction is known to be crucial to understand its electronic and transport properties. Using first-principles calculations we first probe a comprehensive set of mechanisms responsible for the stability of the prototype junction of a benzene-dithiol (BDT) between gold electrodes. We find that by pulling the electrodes apart the geometry of the molecule depends drastically on the electrode-surface morphology. We next report results of the quantum transport calculations for several stable junction configurations. The calculations are performed using the recently developed technique based on density functional theory and complex absorbing potentials[1]. The molecular junction is treated as a closed system with a set of complex potentials mimicking the source and the drain electrodes. We find that the conductance of the BDT molecule varies significantly within the different junction configurations. We will compare the results with recent experiments on BDT break junctions. [1]. K. Varga and S.T. Pantelides, PRL 98, 076804 (2007).

Sergueev, Nikolai; Tsetseris, Leonidas; Varga, Kalman; Pantelides, Sokrates

2009-03-01

249

Superbox method for order-N electronic structure calculations for very large systems  

NASA Astrophysics Data System (ADS)

We have developed a superbox method for ab initio electronic structure calculations for very large systems. The method is applicable to density-fucntional or Hartree-Fock-based calculations. In this approach a molecule, a cluster, or a large supercell of a crystal is divided into a number of boxes. Self-consistent calculations are then carried out in parallel for each box, treating it either as a supercell or as a free unit. The wave function or the Green's function of the total system is then constructed by connecting the solutions obtained in the individual boxes by a rigorous and formally exact procedure that yields a self- consistent solution for the entire system. The method has been implemented by using the recently introduced Lagrange-function basis [1]. Examples will be presented using density functional theory to demonstrate the linear scaling of the approach with respect to the number of atoms in the system. [1] K. Varga, Z. Zhang, and S. T. Pantelides, Phys. Rev. Lett. 93, 176403 (2004).

Varga, Kalman; Pantelides, S. T.

2005-03-01

250

A new Brazilian Passiflora leafminer: Spinivalva gaucha, gen. n., sp. n. (Lepidoptera, Gracillariidae, Gracillariinae), the first gracillariid without a sap-feeding instar.  

PubMed

Male, female, pupa, larva and egg of a new genus and species of Gracillariidae (Gracillariinae), Spinivalva gaucha Moreira and Vargas from southern Brazil are described and illustrated with the aid of optical and scanning electron microscopy. A preliminary analysis of mitochondrial DNA sequences including members of related lineages is also provided. The immature stages are associated with Passiflora actinia, Passiflora misera and Passiflora suberosa (Passifloraceae), and build mines on the adaxial leaf surface. Initially the mines are serpentine in shape, but later in larval ontogeny become a blotch type. Although the larvae are hypermetamorphic as in other Gracillariidae, there is no sap-feeding instar in Spinivalva gaucha; the larva feeds on the palisade parenchyma, thus producing granular frass during all instars. Pupation occurs outside the mine; prior to pupating, the larva excretes numerous bubbles that are placed in rows on the lateral margins of the cocoon external surface. This is the second genus of gracillariid moth described for the Atlantic Rain Forest, and the second gracillariid species known to be associated with Passifloraceae. PMID:23794860

Brito, Rosângela; Gonçalves, Gislene L; Vargas, Hector A; Moreira, Gilson R P

2013-04-17

251

Two on Wagner  

NSDL National Science Digital Library

In September 1876, Karl Marx found the time to complain in a letter to his daughter Jenny: "Wherever one goes these days one is pestered with the question: What do you think of Wagner?" In his life, Richard Wagner was the subject of great discussion and admiration, and his works remain immensely popular today. Taken together, these two sites represent a nice introduction to both the man and his body of work, and visitors will enjoy visiting both of them. The first site is maintained by Wagner enthusiast Vincent Vargas, and here visitors can learn about various productions of Wagner's operas, his life, and also get a glimpse into the world of famous Wagnerians throughout history, including Herbert von Karajan and Birgit Nilsson. Of course, visitors can also listen to sound clips from some of their performances as well. The second site was created by the BBC and it provides some basic information about Wagner's Ring Cycle, complete with plot synopses and material on the various leitmotifs utilized throughout these works. Visitors can also listen to an interview with conductor Daniel Barenboim about his involvement with his production of the Ring.

252

Investigation of ?-resonances in ^10Be using ^6He(,)^6He  

NASA Astrophysics Data System (ADS)

Numerous theoretical and experimental studies have shown the importance of clustering in light nuclei [1]. The Be isotopes have been of particular interest recently due to their exotic two-core ?+?+ valence neutrons configurations [2,3,4,5]. Experimentally, (,) reactions are prime tools for studying these structures. In this work, the ^6He+? excitation function in the range of 10 to 18.5 MeV was measured. The ^6He beam was produced with the RESOLUT radioactive beam facility at FSU. Measurements were performed using the active target detector ANASEN [6]. Parameters of the observed states were determined by an R-Matrix analysis. The properties of these resonances in ^10Be will be discussed.[4pt] [1] M. Freer, Rep. Prog. Phys. 70, 2149 (2007).[0pt] [2] A. Dote, H. Horiuchi, and Y. Kanada-Enyo, Phys. Rev. C 56, 1844 (1997).[0pt] [3] N. Itagaki and S. Okabe, Phys. Rev. C 61, 044306 (2000).[0pt] [4] Y. Ogawa, K. Arai, Y. Suzuki, and K. Varga, Nucl. Phys. A 673, 122 (2000).[0pt] [5] M. Freer, et al., Phys. Rev. Lett. 96, 042501 (2006).[0pt] [6] M.Matos, et al., Proc. Intern. Symposium on Nuclei in the Cosmos XI, July 2010, Heidelberg, Germany, p.226 (2010).

Kuchera, Anthony; Rogachev, G. V.; Blackmon, J. C.; Wiedenhoever, I.; Baby, L. T.; Belarge, J. A.; Johnson, E. D.; Koshchiy, E.; Lai, J.; Linhardt, L. E.; Macon, K.; Matos, M.; Santiago-Gonzalez, D.

2012-10-01

253

Christopher Columbus and Culicoides: was C. jamaicensis Edwards, 1922 introduced into the Mediterranean 500 years ago and later re-named C. paolae Boorman 1996?  

PubMed

The biting midge, Culicoides paolae Boorman, described from specimens collected in the extreme south of Italy in 1996, belongs in the subgenus Drymodesmyia. This subgenus was erected by Vargas in 1960 for the so-called Copiosus species group, an assemblage of 22 species endemic to the tropical regions of the New World and, where known, breed in vegetative materials including the decaying leaves (cladodes) and fruits of Central American cacti. The Mexican peoples have utilised these cacti for over 9,000 years; one of these, Opuntia ficus-indica Linnaeus, was brought to Europe by Christopher Columbus following his voyages of discovery. As a taxon C. paolae is very similar to the Central American C. jamaicensis Edwards, 1922 raising the possibility that it (or a closely related species of Drymodesmyia) was introduced into the Mediterranean Region at the time of Columbus, but was (perplexingly) discovered only 500 years later and named C. paolae. The comparison of Sardinian specimens of C. paolae with Panamanian material of C. jamaicensis (housed in the Natural History Museum in London) confirmed the two species to be very similar but unusual differences were noted around the precise distribution of the sensilla coeloconica on the female flagellum. Until it is understood whether these differences represent either intra- or interspecific variation, the question of the possible synonymy of C. paolae must be held in abeyance. PMID:20419690

Meiswinkel, R; Labuschagne, K; Goffredo, M

254

Star formation in H II galaxies  

NASA Astrophysics Data System (ADS)

H II galaxies integrated properties have been widely studied. However, little is known about the individual H II regions and their photoionizing stellar clusters. To broaden our knowledge on star formation in low mass star-forming galaxies (like H II galaxies) it is necessary to answer questions like: How does the star formation distributes along the galaxy? Is it possible for them to form super stellar clusters? How does the star formation history on them looks like? To answer those questions the goal of this thesis work is to map (at tens of parsecs resolution) the recent star formation in six H II galaxies with extremely young star-forming bursts (Rosa-González et al. 2007, ApJ, 654, 226). The preliminary results obtained have allowed us to develop a catalog of H II regions (identified for the first time) in these galaxies and the characterization of the young stellar clusters responsible for their photoionization using POPSTAR (Mollá, García-Vargas, & Bressan 2009, MNRAS, 398, 451) stellar populations models.

Torres-Campos, A.; Díaz, A. I.; Terlevich, E.; Rosa-González, D.; Telles, E.; Terlevich, R.

2013-05-01

255

Influence of equilibrium flows and the atmospheric magnetic field on solar oscillation modes  

NASA Astrophysics Data System (ADS)

The competing effects of an atmospheric magnetic field and an equilibrium flow in the internal regions of the Sun are studied on the helioseismic f- and p-modes. The Sun is modeled as a multi-layered plasma, where the upper parts, representing the chromosphere and corona, are embedded in a unidirectional though inhomogeneous magnetic field, meanwhile the lower part, representing the sub-photospheric polytropic region, is in a steady equilibrium state. The steady state sub-surface region can be considered as a first approximation of dynamic motions (e.g., convective motion, differential rotation, sub-surface flows, meridional flows, etc.). The obtained frequency shifts of the different eigenmodes are associated with flow and magnetic effects. We also found damping of the eigenfrequencies which apparently can be associated with the universal mechanism of resonant absorption. Resonant absorption (already known as a viable heating mechanism in the solar corona) is present due to inhomogeneities in the atmosphere which give rise to Alfvén and slow continua. Damping of helioseismic modes occurs when the modes are coupled into these continua. When both atmospheric magnetic field and sub-surface flows are present, a complex picture of competition of these two effects is found. The theoretically predicted frequency shifts in a steady state are in excellent agreement with the observed values. For related works see also the papers by Erdélyi & Taroyan and Varga & Erdélyi in the present Volume.

Pintér, B.; Erdélyi, R.; New, R.; Goossens, M.

2001-01-01

256

Remote rainfall sensing for landslide hazard analysis  

USGS Publications Warehouse

Methods of assessing landslide hazards and providing warnings are becoming more advanced as remote sensing of rainfall provides more detailed temporal and spatial data on rainfall distribution. Two recent landslide disasters are examined noting the potential for using remotely sensed rainfall data for landslide hazard analysis. For the June 27, 1995, storm in Madison County, Virginia, USA, National Weather Service WSR-88D Doppler radar provided rainfall estimates based on a relation between cloud reflectivity and moisture content on a 1 sq. km. resolution every 6 minutes. Ground-based measurements of rainfall intensity and precipitation total, in addition to landslide timing and distribution, were compared with the radar-derived rainfall data. For the December 14-16, 1999, storm in Vargas State, Venezuela, infrared sensing from the GOES-8 satellite of cloud top temperatures provided the basis for NOAA/NESDIS rainfall estimates on a 16 sq. km. resolution every 30 minutes. These rainfall estimates were also compared with ground-based measurements of rainfall and landslide distribution. In both examples, the remotely sensed data either overestimated or underestimated ground-based values by up to a factor of 2. The factors that influenced the accuracy of rainfall data include spatial registration and map projection, as well as prevailing wind direction, cloud orientation, and topography.

Wieczorek, Gerald F.; McWreath, Harry; Davenport, Clay

2001-01-01

257

AGU Scholars  

NASA Astrophysics Data System (ADS)

In recognition of the strong support and substantial contribution given by the American Geophysical Union to the American Geological Institute's Minority Participation Program, 16 of the 1982-83 scholarship recipients were designated ‘AGU Scholars.’ Because of a matching grant from the National Oceanographic and Atmospheric Administration to increase the number of minority students studying in fields related to the development of marine and coastal resources, five of this group were designated ‘AGU Sea Grant Scholars.’ The AGU Scholars, all of whom are following courses of study related to AGU's broad areas of interest, are Torin J. Edwards, a student of geophysics at the University of New Orleans; Gwendolyn Hofler, geophysics, Virginia State University; Jolecia Mitchell, environmental sciences, Howard University; Louis F. Montiel, geohydrology, Northern Arizona University; Alex M. Richards, geophysics, Northern Arizona University; Roxanne C. Rogers, geophysics, Colorado School of Mines; John F. Vargas, geophysics, University of Kansas; Toni M. VanDam, geophysics, University of Colorado; Edith G. Williams, geophysics, Stanford University; Saundra F. Willis, geosciences, California State University, Northridge; and Lacy B. Ward, geophysics, Virginia State University.

258

[Parasitology and entomology in the 29th century in Latin American narrative].  

PubMed

In the present review of twelve pieces produced by distinguished 20th century Latin American writers--Jorge Luis Borges from Argentina, Jorge Amado and João Ubaldo Ribeiro from Brazil, José Donoso from Chile, Gabriel García Márquez from Colombia, Alejo Carpentier from Cuba, Miguel Angel Asturias from Guatemala, Octavio Paz from Mexico, Mario Vargas Llosa from Perú, Horacio Quiroga and Mario Benedetti from Uruguay and Arturo Uslar-Pietri from Venezuela--paragraphs or parts of paragraphs in which parasitological or entomological situations of the most varied hues are referred to or described, have been extracted in a selective form. Sometimes in these descriptions appear, local or regional expressions, without ignoring colorful folklore representations. For a easier interpretation these or part of these paragraph sentences have been arranged by thematic similarities. In a varied and kaleidoscopic vision, it will be possible to find protozoiasis (malaria, Chagas disease, leishmaniasis, amebiasis), helminthiases (ascariasis, hydatidosis, trichinosis, schistosomiasis, cysticercosis, onchocerciasis), parasitoses produced by arthropods (pediculosis, scabies, tungiasis, myiasis), passing progressively to hemaphagous arthropods (mosquitoes, gnats, horse flies, bedbugs, ticks), venomous arthropods (Latrodectus spiders, scorpions, wasps, bees), mechanical vectors (flies and cockroaches), culminating with a conjunction of bucolic arthropods (butterflies, crickets, grasshoppers cicadas, ants, centipedes, beetles, glow worms, dragonflies). PMID:11338977

Schenone, H

259

Is reasoning from counterfactual antecedents evidence for counterfactual reasoning?  

PubMed

In most developmental studies the only error children could make on counterfactual tasks was to answer with the current state of affairs. It was concluded that children who did not show this error are able to reason counterfactually. However, children might have avoided this error by using basic conditional reasoning (Rafetseder, Cristi-Vargas, & Perner, 2010). Basic conditional reasoning takes an antecedent, which like in counterfactual reasoning can be counter to fact, and combines it with a conditional (or set of conditionals reflecting knowledge of how the world works) to draw a likely conclusion. A critical feature of counterfactual reasoning then is that these additional assumptions be modelled after the actual events to which the counterfactual is taken to be counterfactual. In contrast in basic conditional reasoning one enriches the given antecedent with any plausible assumptions. In our tasks basic conditional reasoning leads to different answers than counterfactual reasoning. For instance, a doctor, sitting in the park with the intention to read a paper, is called to an emergency at the swimming pool. The question, "if there had been no emergency, where would the doctor be?" should counterfactually be answered "in the park". But ignoring the doctor's intentions and just reasoning on plausible grounds one might answer: "in the hospital". Only by 6 years, did children give mostly correct answers. PMID:22187537

Rafetseder, Eva; Perner, Josef

2010-05-01

260

Stability of DNA-linked nanoparticle crystals: Effect of number of strands, core size, and rigidity of strand attachment  

NASA Astrophysics Data System (ADS)

Three-dimensional ordered lattices of nanoparticles (NPs) linked by DNA have potential applications in novel devices and materials, but most experimental attempts to form crystals result in amorphous packing. Here we use a coarse-grained computational model to address three factors that impact the stability of bcc and fcc crystals formed by DNA-linked NPs : (i) the number of attached strands to the NP surface, (ii) the size of the NP core, and (iii) the rigidity of the strand attachment. We find that allowing mobility in the attachment of DNA strands to the core NP can very slightly increase or decrease melting temperature TM. Larger changes to TM result from increasing the number of strands, which increases TM, or by increasing the core NP diameter, which decreases TM. Both results are consistent with experimental findings. Moreover, we show that the behavior of TM can be quantitatively described by the model introduced previously [F. Vargas Lara and F. W. Starr, Soft Matter, 7, 2085 (2011)].

Padovan-Merhar, Olivia; Lara, Fernando Vargas; Starr, Francis W.

2011-06-01

261

Pharmaceutical standardization of Jala Shukti Bhasma and Mukta Shukti Bhasma.  

PubMed

Shukti is an important component of Sudha Varga, which is considered as the latest class in the field of Rasa Shastra. Two types of Shukti have been mentioned in Rasa Shastra texts i.e. Jala Shukti and Mukta Shukti according to the availability. In present study, an attempt has been made to develop a standard manufacturing procedure (SMP) of Jala Shukti Bhasma and Mukta Shukti Bhasma. Five batches of Jala Shukti Bhasma and Mukta Shukti Bhasma were prepared and standardization was attempted by maintaining batch manufacturing records of individual batches. During pharmaceutical procedures like Shodhana, Bhavana, Marana, etc. due care of temperature, its duration, percentage of weight gain or loss and the cost factor of the end product, etc. were considered. The average weight loss observed was 12.08 g i.e. 2.42% and 14.62 g i.e. 2.92% during Jala Shukti and Mukta Shukiti Shodhana respectively. Average weight loss found was 38.94 g i.e. 7.79% in Jala Shukti Bhasma while in Mukta Shukti Bhasma, it was 35.24 g i.e. 7.05%. At the end of the pharmaceutical procedure, it was found that Mukta Shukti Bhasma is 2.8 times costlier than Jala Shukti Bhasma. PMID:23049199

Parmar, Kirti Kumar G; Galib; Patgiri, B J

2012-01-01

262

[Antidiabetic therapy--a new possibility in the complex therapy of cancer?].  

PubMed

Nowadays the lack of exercise and improper eating habits are main characteristics of modern life style. This favors not only formation of type 2 diabetes or cardiovascular diseases, but also increaseas the incidence and prevalence of malignant tumors. Today there are many epidemiologic trials that demonstrate the connection between type 2 diabetes and formation of several malignomas. Its cause should be searched in common paths of pathologic processes. One of this is the birth of hyperinsulinsulinemia, which accompanies insulin resistance. Hyperinsulinemia of the host leads to increased glucose uptake in the highly insuline sensitive tumor cells which supports tumor growth. This makes type 2 diabetes a metabolic state favoring tumor formation, suggesting a potential application of oral insulin sensitizers in cancer therapy. Currently several international trials are testing the anti-tumor activity of metformin and thiazolidinedions (TZD). Besides this, encouraging results were obtained with the use of anti-IGFR antibodies in the treatment of tumors. A common therapy of diabetes and tumor may lead to new possibilities in the treatment of malignant tumor diseases. By doing this we could be able to weaken the tumor and strengthen the body, enabling it to fight against cancer. Bánhegyi RJ, Rus-Gal PO, Nagy AK, Martyin T, Varga R, Pikó B. Correlation between type 2 diabetes and malignant tumors - new possibilities in the complex therapy of cancers? PMID:21163762

Bánhegyi, Róbert János; Rus-Gal, Paul Ovidiu; Nagy, Agnes Krisztina; Martyin, Tibor; Wágner, Róbert; Varga, Richárd; Pikó, Béla

2010-12-01

263

Fiscal Deficits and Interest Rates in the United States: An Empirical Analysis, 1960-84 (Déficits budgétaires et taux d'intérêt aux Etats-Unis: analyse empirique, 1960-84) (El déficit fiscal y las tasas de interés en Estados Unidos: Un análisis empírico, 1960-84)  

Microsoft Academic Search

The paper deals with the ongoing controversy about whether fiscal deficits bring about higher interest rates and whether the historically high peacetime fiscal deficits experienced by the United States in recent years have been the main factor explaining the extraordinarily high level of U.S. real interest rates. On the basis of a simple model of interest rate determination that includes

Vito Tanzi

1985-01-01

264

Freqüência das infecções pelo HIV1, rubéola, sífilis, toxoplasmose, citomegalovírus, herpes simples, hepatite B, hepatite C, doença de Chagas e HTLV I\\/II em gestantes, do Estado de Mato Grosso do Sul Frequency of HIV1, rubella, syphilis, toxoplasmosis, cytomegalovirus, simple herpes virus, hepatitis B, hepatitis C, Chagas' disease and HTLV I\\/II infection in pregnant women of State of Mato Grosso do Sul  

Microsoft Academic Search

It was aimed to estimate the frequency of syphilis, rubella, hepatitis B, hepatitis C, toxoplasmosis, Chagas' disease, HTLV I\\/II, simple herpes virus, HIV-1 and cytomegalovirus in pregnant women and to evaluate the relationship between age and the frequency of the infections studied. A transversal study of 32,512 pregnant women submitted to pre-natal sreening in the period of November 2002 to

Ernesto Antonio Figueiró-Filho; Flávio Renato de Almeida; Alessandro Henrique Antunes Lopes; Orlando Oliveira de Morais; Virgílio Gonçalves; Souza Júnior; Tamara Lemos Maia; Geraldo Duarte

265

Desenvolvimento local e agricultura familiar: o caso da produção de açúcar mascavo em Capanema - Paraná Local development and family agriculture: the brown sugar production case in Capanema city- Paraná state in Brazil Développement local et agriculture familiale: le cas de la production de sucre brun dans la ville de Capanema dans l'état du Paraná au Brésil Desarrollo local y la agricultura familiar: el caso de la producción de azúcar marrón en la ciudad de Capanema - estado de Paraná en Brasil  

Microsoft Academic Search

Resumo: Esse estudo analisa, por meio de um estudo exploratório, o aporte dos produtos derivados da cana-de- açúcar no contexto do desenvolvimento local no município de Capanema - Paraná. Essa atividade se apresenta como opção para a produção da agricultura familiar ao criar alternativa de renda nas unidades agroindustriais, além de possibilitar a diversificação da produção. Os resultados mostram que

Mariza Zeni de Castro; Jandir Ferrera de Lima; Pery Francisco Assis Shikida

2009-01-01

267

66 FR 12658 - Office of Protocol; Gifts to Federal Employees From Foreign Government Sources Reported to...  

Federal Register 2010, 2011, 2012, 2013

...United Mexican States. Government. Unidos de America William Jefferson Clinton, Como Recuerdo de las Visita a los Estados Unidos de America Vincente Fox Quesada, Presidente Electo de Mexico, 24, VIII, 2000;'' Recd-August 24, 2000;...

2001-02-27

268

60 FR 52512 - Commerce Trade Fair Privatization: Private Sector Organization and Management of U.S. Exhibitor...  

Federal Register 2010, 2011, 2012, 2013

...and packaging Brazil machinery Eduardo Altenfelder Commercial Specialist U.S. and Foreign Commercial Service Rua Estados Unidos, 1812 Sao Paulo, S.P. 01427-002 Brazil Tel: 55-11-853-2011/2411/2778 Fax:...

1995-10-06

269

60 FR 17622 - Commerce Trade Fair Privatization: Private Sector Organization and Management of Overseas Trade...  

Federal Register 2010, 2011, 2012, 2013

...B Machado Feiras e Promocoes Ltda., Commercial Officer, US&FCS Rua Rua Brasilio Machado 60, 01230- Estados Unidos, 1812, Sao Paulo, 905, Sao Paulo, Brazil, Tel: 55- S.P., Brazil, Tel: 55-11-853-...

1995-04-06

270

61 FR 63828 - Joint Projects With the U.S. Commercial Centers in Sao Paulo, Brazil, Jakarta, Indonesia, and...  

Federal Register 2010, 2011, 2012, 2013

...in-country. FOR FURTHER INFORMATION CONTACT: John Steuber, Director, U.S. Commercial Center--Sao Paulo, Rua Estados Unidos, 1812, Sao Paulo, SP. 01427-002, Brazil or AMCONGEN--Sao Paulo, Unit 3502, APO AA 34030, TEL:...

1996-12-02

271

63 FR 14424 - Joint Projects with the U.S. Commercial Centers in Sao Paulo, Brazil; Jakarta, Indonesia; and...  

Federal Register 2010, 2011, 2012, 2013

...in-country. FOR FURTHER INFORMATION CONTACT: Alan Long, Director, U.S. Commercial Center--Sao Paulo, Rua Estados Unidos, 1812, Sao Paulo, SP. 01427-002, Brazil; or AMCONGEN--Sao Paulo, Unit 3502, APO AA 34030. Tel:...

1998-03-25

272

PDVSA Waste Oil Lagoon Cleanup Feasibility Study. Characterization and Cost Estimate Report, Mara Estacion E Annex.  

National Technical Information Service (NTIS)

The report was prepared for PDVSA Exploration and Production, Protection Integral in Lagunillas, Estado Zulia, Venezuela to evaluate the conditions in 14 different study areas due to contamination resulting from the exploration, production and refining of...

1998-01-01

273

PDVSA Waste Oil Lagoon Cleanup Feasibility Study. Characterization and Cost Estimate Report, Mara Estacion E.  

National Technical Information Service (NTIS)

The report was prepared for PDVSA Exploration and Production, Protection Integral in Lagunillas, Estado Zulia, Venezuela to evaluate the conditions in 14 different study areas due to contamination resulting from the exploration, production and refining of...

1998-01-01

274

PDVSA Waste Oil Lagoon Cleanup Feasibility Study. External Financing Evaluation Report.  

National Technical Information Service (NTIS)

The report was prepared for PDVSA Exploration and Production, Protection Integral in Lagunillas, Estado Zulia, Venezuela to evaluate the conditions in 14 different study areas due to contamination resulting from the exploration, production and refining of...

1998-01-01

275

PDVSA Waste Oil Lagoon Cleanup Feasibility Study. Characterization and Cost Estimate Report, Canal Bachaquero.  

National Technical Information Service (NTIS)

The report was prepared for PDVSA Exploration and Production, Protection Integral in Lagunillas, Estado Zulia, Venezuela to evaluate the conditions in 14 different study areas due to contamination resulting from the exploration, production and refining of...

1998-01-01

276

PDVSA Waste Oil Lagoon Cleanup Feasibility Study. Characterization and Cost Estimate Report, Mene Grande.  

National Technical Information Service (NTIS)

The report was prepared for PDVSA Exploration and Production, Protection Integral in Lagunillas, Estado Zulia, Venezuela to evaluate the conditions in 14 different study areas due to contamination resulting from the exploration, production and refining of...

1998-01-01

277

PDVSA Waste Oil Lagoon Cleanup Feasibility Study. Characterization and Cost Estimate Report, Las Gemelas.  

National Technical Information Service (NTIS)

The report was prepared for PDVSA Exploration and Production, Protection Integral in Lagunillas, Estado Zulia, Venezuela to evaluate the conditions in 14 different study areas due to contamination resulting from the exploration, production and refining of...

1998-01-01

278

PDVSA Waste Oil Lagoon Cleanup Feasibility Study. Characteriztion and Cost Estimate Report, La Concepcion.  

National Technical Information Service (NTIS)

The report was prepared for PDVSA Exploration and Production, Protection Integral in Lagunillas, Estado Zulia, Venezuela to evaluate the conditions in 14 different study areas due to contamination resulting from the exploration, production and refining of...

1998-01-01

279

PDVSA Waste Oil Lagoon Cleanup Feasibility Study. Characterization and Cost Estimate Report, Mara DM-120.  

National Technical Information Service (NTIS)

The report was prepared for PDVSA Exploration and Production, Protection Integral in Lagunillas, Estado Zulia, Venezuela to evaluate the conditions in 14 different study areas due to contamination resulting from the exploration, production and refining of...

1998-01-01

280

PDVSA Waste Oil Lagoon Cleanup Feasibility Study. Prioritization Report.  

National Technical Information Service (NTIS)

The report was prepared for PDVSA Exploration and Production, Protection Integral in Lagunillas, Estado Zulia, Venezuela to evaluate the conditions in 14 different study areas due to contamination resulting from the exploration, production and refining of...

1998-01-01

281

NORMAS DE BUENAS PRÁCTICAS CLÍNICAS (BPC)  

Center for Biologics Evaluation and Research (CBER)

Text Version... Unión Europea, Japón y los Estados Unidos, así como las de Australia, Canadá, los países Nórdicos y la Organización Mundial de la Salud (OMS). ... More results from www.fda.gov/downloads/drugs/guidancecomplianceregulatoryinformation

282

Los Ref ige ios!  

Center for Food Safety and Applied Nutrition (CFSAN)

Text Version... Las Guías Alimentarias para las Personas que Viven en los Estados Unidos recomiendan que escoja leche baja en grasa o sin grasa, yogur o ... More results from www.fda.gov/downloads/food/ingredientspackaginglabeling

283

Demographic implications of the New United States certificates  

Microsoft Academic Search

\\u000a Resumen  Rara atender al desarrollo de una información uniforme de sucesos vitales en los cincuenta estados, junto con Puerto Rico\\u000a y las islas Vírgenes, el gobierno de los Estados Unidos prepara cettificados estandar de nacimienios, muertes fetales, muertes,\\u000a matrimonios y divorcios. Estos modelos son revisados aproximadamente cada diez años con asistencia de todos los esiados, Actualmente\\u000a se está preparando una revisión

Anders S. Lunde; Robert D. Grove

1966-01-01

284

Boletín del Instituto Nacional del Cáncer - 31 de enero de 2012  

Cancer.gov

Dr. Nils Daulaire Salud mundial a través de la colaboración y el liderazgo Para conmemorar el Día Mundial del Cáncer que tuvo lugar el 4 febrero, el doctor Nils Daulaire, director de la Oficina de Asuntos Internacionales del Departamento de Salud y Servicios Humanos de los Estados Unidos habla sobre las razones por las cuales los Estados Unidos deben participar en iniciativas para mejorar la salud mundial.

285

Emergence of protocellular growth laws.  

PubMed

Template-directed replication is known to obey a parabolic growth law due to product inhibition (Sievers & Von Kiedrowski 1994 Nature 369, 221; Lee et al. 1996 Nature 382, 525; Varga & Szathmáry 1997 Bull. Math. Biol. 59, 1145). We investigate a template-directed replication with a coupled template catalysed lipid aggregate production as a model of a minimal protocell and show analytically that the autocatalytic template-container feedback ensures balanced exponential replication kinetics; both the genes and the container grow exponentially with the same exponent. The parabolic gene replication does not limit the protocellular growth, and a detailed stoichiometric control of the individual protocell components is not necessary to ensure a balanced gene-container growth as conjectured by various authors (Gánti 2004 Chemoton theory). Our analysis also suggests that the exponential growth of most modern biological systems emerges from the inherent spatial quality of the container replication process as we show analytically how the internal gene and metabolic kinetics determine the cell population's generation time and not the growth law (Burdett & Kirkwood 1983 J. Theor. Biol. 103, 11-20; Novak et al. 1998 Biophys. Chem. 72, 185-200; Tyson et al. 2003 Curr. Opin. Cell Biol. 15, 221-231). Previous extensive replication reaction kinetic studies have mainly focused on template replication and have not included a coupling to metabolic container dynamics (Stadler et al. 2000 Bull. Math. Biol. 62, 1061-1086; Stadler & Stadler 2003 Adv. Comp. Syst. 6, 47). The reported results extend these investigations. Finally, the coordinated exponential gene-container growth law stemming from catalysis is an encouraging circumstance for the many experimental groups currently engaged in assembling self-replicating minimal artificial cells (Szostak 2001 et al. Nature 409, 387-390; Pohorille & Deamer 2002 Trends Biotech. 20 123-128; Rasmussen et al. 2004 Science 303, 963-965; Szathma ry 2005 Nature 433, 469-470; Luisi et al. 2006 Naturwissenschaften 93, 1-13). PMID:17472929

Rocheleau, Tristan; Rasmussen, Steen; Nielsen, Peter E; Jacobi, Martin N; Ziock, Hans

2007-10-29

286

A Cube Dismantling Problem Related to Bootstrap Percolation  

NASA Astrophysics Data System (ADS)

An n× n×⋯× n hypercube is made from n d unit hypercubes. Two unit hypercubes are neighbours if they share a ( d-1)-dimensional face. In each step of a dismantling process, we remove a unit hypercube that has precisely d neighbours. A move is balanced if the neighbours are in d orthogonal directions. In the extremal case, there are n d-1 independent unit hypercubes left at the end of the dismantling. We call this set of hypercubes a solution. If a solution is projected in d orthogonal directions and we get the entire [ n] d-1 hypercube in each direction, then the solution is perfect. We show that it is possible to use a greedy algorithm to test whether a set of hypercubes forms a solution. Perfect solutions turn out to be precisely those which can be reached using only balanced moves. Every perfect solution corresponds naturally to a Latin hypercube. However, we show that almost all Latin hypercubes do not correspond to solutions. In three dimensions, we find at least n perfect solutions for every n, and we use our greedy algorithm to count the perfect solutions for n?6. We also construct an infinite family of imperfect solutions and show that the total size of its three orthogonal projections is asymptotic to the minimum possible value. Our results solve several conjectures posed in a proceedings paper by Barát, Korondi and Varga. If our dismantling process is reversed we get a build-up process very closely related to well-studied models of bootstrap percolation. We show that in an important special case our build-up reaches the same maximal position as bootstrap percolation.

Barát, János; Wanless, Ian M.

2012-11-01

287

Electronic origin of kinetic and dynamic processes at atomic steps on vicinal metal substrates  

NASA Astrophysics Data System (ADS)

Single-atomic-layer steps play an important role in the kinetics and dynamics of morphological evolution and structural formation at surfaces. In this talk, we will attempt to elucidate the importance of the electronic nature in determining the bonding of adatoms and the activation barriers for adatom descent at step edges. The insights gained through first-principles case studies have timely and important impacts in understanding the evolution of many nanostructured surfaces and prevention of electrical breakdown in nanodevices. In the first case [1], we establish a clear correlation between the preferred diffusion mechanism and step-edge barrier and the relative degree of electronic shell filling of the adatom and the substrate. We also find an approximate linear relation between the adatom step-edge hopping barrier and the adatom-surface bonding strength with a slope roughly proportional to the number of the nearest neighbors of the adatom in the initial state. These results can serve as simple guiding rules for predicting precise atomic surface morphologies and designing desirable surface nanostructures, such as atom wires [2]. In the second case [3], we discover an optimal surface electromigration inhibitor on the technologically important Cu(111) surface, characterized by energetically favoring and binding strongly at the kink of step edges. Finally, we will briefly discuss how the electronic bonding strengths influence the nucleation and growth behavior of carbon atoms at the step edges of various transition-metal surfaces, a crucial insight in designing optimal kinetic pathways for mass production of quality epitaxial graphene [4]. [4pt] [1] Y. Mo, W. G. Zhu, E. Kaxiras, and Z. Y. Zhang, Phys. Rev. Lett. 101, 216101 (2008). [0pt] [2] Y. Mo, K. Varga, E. Kaxiras, and Z. Y. Zhang, Phys. Rev. Lett. 94, 155503 (2005). [0pt] [3] K. H. Bevan, W. G. Zhu, H. Guo, and Z. Y. Zhang, Phys. Rev. Lett. (submitted). [0pt] [4] H. Chen, W. G. Zhu, and Z. Y. Zhang, Phys. Rev. Lett. 104, 186101 (2010).

Zhu, Wenguang

2011-03-01

288

Archetypal structure of ultrathin alumina films: Grazing-incidence x-ray diffraction on Ni(111)  

NASA Astrophysics Data System (ADS)

We have studied by grazing-incidence x-ray diffraction the atomic structure of an ultrathin alumina film grown on Ni(111). We show that, since there is neither registry between the film and the substrate nor induced Ni relaxations, this system appears to be a prototypical freestanding oxide layer. We have been able to unambiguously determine the three-dimensional structure of the film, which consists of a substrate/Al16/O24/Al24/O28 stacking within a (18.23 × 10.53 Å) R0° unit cell. From the different Al coordinations (3/4/5) in the layer and from the precise determination of the Al-O interatomic distances, we conclude that the film structure presents some similarities with the ? phase of bulk alumina, which also has a high surface/bulk ratio. The precise comparison between these two structures allows us to explain that the perfect 3 ratio between the two sides of the mesh of the film is governed by the stacking of the two central planes, combining oxygen close-packed atoms below Al atoms in tetrahedral or pyramidal positions. Moreover, Al atoms at the interface plane of the ultrathin film adopt a quasitrihedral configuration, which confirms that, in the alumina ? phase, Al atoms with such a coordination are located near the surface of the nanocrystals. The atomic structure is also very close to the one first proposed by Kresse [G. Kresse, M. Schmid, E. Napetschnig, M. Shishkin, L. Köhler, and P. Varga, ScienceSCIEAS0036-807510.1126/science.1107783 308, 1440 (2005)] for alumina films on NiAl(110). This strongly suggests that this atomic model, within small variations, can be extended to ultrathin alumina film on numerous other metal substrates and may be quasi-intrinsic to a freestanding layer rather than governed by the interactions between the film and the substrate.

Prévot, G.; Le Moal, S.; Bernard, R.; Croset, B.; Lazzari, R.; Schmaus, D.

2012-05-01

289

Regions of Rhodobacter sphaeroides cytochrome c2 required for export, heme attachment, and function.  

PubMed Central

Cytochrome c2 is a periplasmic redox protein involved in both the aerobic and photosynthetic electron transport chains of Rhodobacter sphaeroides. The process of cytochrome c2 maturation has been analyzed in order to understand the protein sequences involved in attachment of the essential heme moiety to the cytochrome c2 polypeptide and localization of the protein to the periplasm. To accomplish this, five different translational fusions which differ only in the cytochrome c2 fusion junction were constructed between cytochrome c2 and the Escherichia coli periplasmic alkaline phosphatase. All five of the fusion proteins are exported to the periplasmic space. The four fusion proteins that contain the NH2-terminal site of covalent heme attachment to cytochrome c2 are substrates for heme binding, suggesting that the COOH-terminal region of the protein is not required for heme attachment. Three of these hybrids possess heme peroxidase activity, which indicates that they are functional as electron carriers. Biological activity is possessed by one hybrid protein constructed five amino acids before the cytochrome c2 COOH terminus, since synthesis of this protein restores photosynthetic growth to a photosynthetically incompetent cytochrome c2-deficient derivative of R. sphaeroides. Biochemical analysis of these hybrids has confirmed CycA polypeptide sequences sufficient for export of the protein (A. R. Varga and S. Kaplan, J. Bacteriol. 171:5830-5839, 1989), and it has allowed us to identify regions of the protein sufficient for covalent heme attachment, heme peroxidase activity, docking to membrane-bound redox partners, or the capability to function as an electron carrier. Images

Brandner, J P; Stabb, E V; Temme, R; Donohue, T J

1991-01-01

290

Dissociated mean and functional connectivity BOLD signals in visual cortex during eyes closed and fixation.  

PubMed

We investigated the effects of resting state type on blood oxygen level-dependent (BOLD) signal and functional connectivity in two paradigms: participants either alternated between fixation and eyes closed or maintained fixation or eyes closed throughout each scan. The BOLD signal and functional connectivity of lower and higher tiers of the visual cortical hierarchy were found to be differentially modulated during eyes closed versus fixation. Fixation was associated with greater mean BOLD signals in primary visual cortex and lower mean BOLD signals in extrastriate visual areas than periods of eyes closed. In addition, analysis of thalamocortical functional connectivity during scans in which participants maintained fixation showed synchronized BOLD fluctuations between those thalamic nuclei whose mean BOLD signal was systematically modulated during alternating epochs of eyes closed and fixation, primary visual cortex and the attention network, while during eyes closed negatively correlated fluctuations were seen between the same thalamic nuclei and extrastriate visual areas. Finally, in all visual areas the amplitude of spontaneous BOLD fluctuations was greater during eyes closed than during fixation. The dissociation between early and late tiers of visual cortex, which characterizes both mean and functionally connected components of the BOLD signal, may depend on the reorganization of thalamocortical networks. Since dissociated changes in local blood flow also characterize transitions between different stages of sleep and wakefulness (Braun AR, Balkin TJ, Wesenten NJ, Gwadry F, Carson RE, Varga M, Baldwin P, Belenky G, Herscovitch P. Science 279: 91-95, 1998), our results suggest that dissociated endogenous neural activity in primary and extrastriate cortex may represent a general aspect of brain function. PMID:22875902

McAvoy, Mark; Larson-Prior, Linda; Ludwikow, Marek; Zhang, Dongyang; Snyder, Abraham Z; Gusnard, Debra L; Raichle, Marcus E; d'Avossa, Giovanni

2012-08-08

291

Novel variants of human SCaMC-3, an isoform of the ATP-Mg/Pi mitochondrial carrier, generated by alternative splicing from 3?-flanking transposable elements  

PubMed Central

CaMCs (calcium-dependent mitochondrial carriers) represent a novel subfamily of metabolite carriers of mitochondria. The ATP-Mg/Pi co-transporter, functionally characterized more than 20 years ago, has been identified to be a CaMC member. There are three isoforms of the ATP-Mg/Pi carrier in mammals, SCaMC-1 (short CaMC-1), -2 and -3 (or APC-1, -3 and -2 respectively), corresponding to the genes SLC25A24, SLC25A25 and SLC25A23 respectively, as well as six N-terminal variants generated by alternative splicing for SCaMC-1 and -2 isoforms. In the present study, we describe four new variants of human SCaMC-3 generated by alternative splicing. The new mRNAs use the exon 9 3?-donor site and distinct 5?-acceptor sites from repetitive elements, in regions downstream of exon 10, the last exon in all SCaMCs. Transcripts lacking exon 10 (SCaMC-3b, -3b?, -3c and -3d) code for shortened proteins lacking the last transmembrane domain of 422, 456 and 435 amino acids, and were found in human tissues and HEK-293T cells. Mitochondrial targeting of overexpressed SCaMC-3 variants is incomplete. Surprisingly, the import impairment is overcome by removing the N-terminal extension of these proteins, suggesting that the hydrophilic N-terminal domain also participates in the mitochondrial import process, as shown for the CaMC members aralar and citrin [Roesch, Hynds, Varga, Tranebjaerg and Koehler (2004) Hum. Mol. Genet. 13, 2101–2111].

2005-01-01

292

Sleep Disordered Breathing, Insomnia Symptoms, and Sleep Quality in a Clinical Cohort of US Hispanics in South Florida  

PubMed Central

Study Objectives: There is a paucity of information on the epidemiology of sleep disorders among US Hispanics. This study describes the frequency of sleep disordered breathing (SDB) risk, insomnia complaints, poor sleep quality, and daytime somnolence in a clinical cohort of ethnically diverse US Hispanics living in South Florida. Methods: We explored the presence of sleep disorders in a cohort of Hispanics seen at primary care, pulmonary, and sleep clinics at the University of Miami and Miami Veterans Affair Medical Center. Participants completed validated questionnaires, evaluating risk of SDB, presence of insomnia symptoms, sleep quality, and daytime sleepiness. Polysomnography was completed on the majority of the sleep clinic participants. Results: Participants (N = 282; 62% male; mean age 54 ± 15 years; mean BMI 31 ± 6 kg/m2) included Hispanics of Cuban, Puerto Rican, Central/South American, and Caribbean heritage. Excessive daytime sleepiness was noted by 45% of participants. Poor sleep quality was reported by 49%; 76% screened high risk for SDB, and 68% had insomnia symptoms. Sleep disorders were more commonly reported in sleep clinic participants; however, 54% of non-sleep clinic participants were high risk for SDB, 35% had insomnia complaints, 28% had poor sleep quality, and 18% reported daytime sleepiness. Conclusions: Sleep disorders (including SDB) are common in clinical samples of Hispanics in South Florida. These findings highlight the urgent need for linguistically relevant and culturally responsive screening, awareness and education programs in clinical sleep medicine among US Hispanics. Citation: Shafazand S; Wallace DM; Vargas SS; Del Toro Y; Dib S; Abreu AR; Ramos A; Nolan B; Baldwin CM; Fleming L. Sleep disordered breathing, insomnia symptoms, and sleep quality in a clinical cohort of US Hispanics in South Florida. J Clin Sleep Med 2012;8(5):507-514.

Shafazand, Shirin; Wallace, Douglas M.; Vargas, Silvia S.; Del Toro, Yanisa; Dib, Salim; Abreu, Alexandre R.; Ramos, Alberto; Nolan, Bruce; Baldwin, Carol M.; Fleming, Lora

2012-01-01

293

Pressure effects on sarcoplasmic reticulum: a Fourier transform infrared spectroscopic study.  

PubMed

The Ca2(+)-ATPase of sarcoplasmic reticulum is irreversibly inactivated by exposure to 1.5-2.0 kbar pressure for 30-60 min in a Ca2(+)-free medium; mono- or decavanadate (5 mM) or to a lesser extent Ca2+ (2-20 mM) protect against inactivation (Varga et al. (1986) J. Biol. Chem. 261, 13943-13956). The structural basis of these effects was analyzed by FTIR spectroscopy of sarcoplasmic reticulum in 2H2O medium. The inactivation of the Ca2(+)-ATPase at 1.5-2.0 kbar pressure in a Ca2(+)-free medium was accompanied by changes in the Amide II region of the spectrum (1550 cm-1), that are consistent with increased hydrogen-deuterium (H-2H) exchange, and by the enhancement of a band at 1630 cm-1 in the Amide I region, that is attributed to an increase in beta sheet. The frequency of the peak of the Amide I band shifted from about 1648 cm-1 at atmospheric pressure to 1642 cm-1 at approximately equal to 12.5 kbar pressure, suggesting a decrease in alpha helix, and an increase in beta and/or random coil structures. Upon releasing the pressure, the shift of the Amide I band was partially reversed. Vanadate (5 mM), and to a lesser extent Ca2+ (2-20 mM), protected the Ca2(+)-ATPase against pressure-induced changes both in the Amide I and Amide II regions of the spectrum, together with protection of ATPase activity. These observations establish a correlation between the conformation of the Ca2(+)-ATPase and its sensitivity to pressure. The involvement of the ATP binding domain of the Ca2(+)-ATPase in the pressure-induced structural changes is suggested by the decreased polarization of fluorescence of fluorescein 5'-isothiocyanate covalently attached to the enzyme. PMID:2138499

Buchet, R; Carrier, D; Wong, P T; Jona, I; Martonosi, A

1990-03-30

294

PA01.62. Mukta-sukti bhasma; nectar for acid peptic disorders, w.s.r to its anti-ulcer activity - an experimental study  

PubMed Central

Purpose: Mukta Shukti (Pearl oyster shell); a sudha varga dravya, attains better therapeutic properties with proper sodhana and marana processes. It is indicated in Amlapitta, Parinamashoola and Annadravashoola. Acharya Susruta mentioned; Amla is the property of Vidagdha Pitta. The term Amlapitta may be correlated with Acid reflux syndrome which comprises of various types of Gastro esophageal reflux diseases like Gastritis, Peptic ulcer etc. A peptic ulcer is a sore on the lining of the stomach or duodenum, the beginning of the small intestine. A bacterium called Helicobacter pylori is a major cause of peptic ulcers. An attempt was made in this regard to establish standards to assure quality and to assess antiulcer activity of Mukta Sukti Bhasma. Method: Mukta sukti Bhasma prepared as per Rasatarangini and subjected to Atomic absorption spectroscopy (AAS) and X ray diffraction (XRD). Anti ulcer activity of Mukta sukti Bhasma in Albino rats by Aspirin induced gastric ulcer. Sucralfate as standard group and normal food water as control group used for the comparison. Result: Mukta sukti Bhasma showed highly significant Anti ulcer activity than control group. The alkaline pH and chemical components might have contributed by inhibiting secretions, neutralizing the acidity and reducing size of the ulcerative lesions. Presence of Calcium (Ca), Magnesium (Mg), Manganese (Mn), Iron (Fe), Potassium (K), Aluminum (Al), Copper (Cu), Sodium (Na) and Zinc (Zn) were detected in raw Mukta sukti and Mukta sukti Bhasma. X ray diffraction shown face centered Cubic, hexagonal, tetragonal and monoclinic crystal structures. Conclusion: In aspirin induced model, the Mukta sukti Bhasma and standard group (Sucralfate) showed highly significant Anti ulcer activity than control group (food water). The Mukta sukti Bhasma showed highly significant Anti ulcer activity than standard group (Sucralfate) when compared. This experimental study has given scientific evidence for the claim in the ancient text regarding the Anti ulcer property of Mukta sukti Bhasma which gives scope for conducting clinical study.

Sreejith, R

2012-01-01

295

Informe a la nación indica que continúa la disminución de las tasas de mortalidad por cáncer que empezó a principios de los noventa; Una sección especial destaca los cánceres asociados al exceso de peso y a la falta de actividad física adecuada  

Cancer.gov

Los índices de mortalidad por todos los cánceres combinados para hombres, mujeres y niños siguieron bajando en Estados Unidos entre 2004 y 2008, según el Informe Anual a la Nación sobre el Estado del Cáncer de 1975 a 2008. El índice general de diagnósticos nuevos de cáncer, que se conoce también como incidencia, bajaron entre los hombres un promedio de 0,6% por año entre 2004 y 2008. Los índices generales de incidencia de cáncer entre las mujeres bajaron 0,5% por año de 1998 hasta 2006; estos índices se nivelaron de 2006 a 2008.

296

Sinuosity change of the Po River near Cremona (Northern Italy) - a result of neotectonic activity?  

NASA Astrophysics Data System (ADS)

In the map sheets of the Second Military Survey of the Habsburg Empire, Lombardia, Parma, Modena and Venice also can be seen (Timár et al., 2006). This area was surveyed between 1818 and 1829. In these map sheets, we can also follow the river Po from Vaccarizza to the delta. This river reach is about 350 km long. This river reach was digitized and sinuosity values were calculated with different window sizes, and displayed in a spectrum-like diagram (sinuosity spectra; after van Balen et al., 2008). At Cremona, a significante sinuosity change were identified. The sinuosity increasing, and we have high sinuosity values. In the summarizing geological map of Italy (Compagnoni and Calluzzo, 2004), at this place, a tectonic line was identified. So probably this fault line invokes the sinuosity change on the river. The vertical movements indicated on the maps are just the opposite like they would be according to the flume experiments of Ouchi (1985). In the case of the Po River at Cremona, the decrease of the channel slope results higher sinuosity. The reason is that the rate of the slope and water discharge is higher than it is required by the self-organized meandering and the river parameters fell to the range of the unorganized meandering (cf. Timár, 2003). Another possible explanation could be that the northern tributary, the Adda River has significant sediment load that lowers the sinuosity of the trunk river at the confluence. Compagnoni, B., Galluzzo, F. (eds., 2004): Geological Map of Italy. Agenzia per la Protezione dell'Ambiente per I Servizi Tecnici - Dipartimento Difesa del Suolo, Servizio Geologico d'Italia, Rome-Florence-Genoa. Map, scale=1:1250000, especially printed for the 32nd International Geological Congress. Ouchi, S. (1985): Response of alluvial rivers to slow active tectonic movement. Geol. Soc. Am. Bull. 96: 504-515. Timár, G. (2003): Controls on channel sinuosity changes: a case study of the Tisza River, the Great Hungarian Plain. Quaternary Science Reviews 22: 2199-2207. Timár, G., Molnár, G., Székely, B., Biszak, S., Varga, J., Jankó, A. (2006): Digitized maps of the Habsburg Empire - The map sheets of the second military survey and their georeferenced version. Arcanum, Budapest, 59 p. van Balen, R. T., Kasse, C., Moor, J. (2008): Impact of groundwater flow on meandering; example from the Geul river, the Netherlands. Earth Surf. Process. and Landf. 33(13): 2010-2028.

Petrovszki, Judit; Timár, Gábor

2010-05-01

297

PREFACE: 14th Latin American Workshop on Plasma Physics (LAWPP 2011)  

NASA Astrophysics Data System (ADS)

These proceedings present the written contributions from participants of the Latin American Workshop on Plasma Physics (LAWPP), which was held in Mar del Plata, Argentina, on 20-25 November 2011. This was the 14th session of the series of LAWPP biennial meetings, which started in 1982. The five-day scientific program of LAWPP 2011 consisted of 32 talks and various poster sessions, with the participation of 135 researchers from Argentina, Brazil, Canada, Chile, Colombia, Mexico, Puerto Rico, USA, Venezuela, as well as others from Europe and Asia. In addition, a School on Plasma Physics and a Workshop on Industrial Applications of Plasma Technology (AITP) were organized together with the main meeting. The five-day School held in the week previous to the meeting was intended for young scientists starting their research in Plasma Physics. On the other hand, the objective of the AITP Workshop was to enhance regional academic and industrial cooperation in the field of plasma assisted surface technology. Topics addressed at LAWPP 2011 included space plasmas, dusty plasmas, nuclear fusion, non-thermal plasmas, basic plasma processes, plasma simulation and industrial plasma applications. This variety of subjects is reflected in these proceedings, which the editors hope will result in enjoyable and fruitful reading for those interested in Plasma Physics. It is a pleasure to thank the Institutions that sponsored the meeting, as well as all the participants and collaborators for making this meeting possible. The Editors Luis Bilbao, Fernando Minotti and Hector Kelly LAWPP participants Participants of the 14th Latin American Workshop on Plasma Physics, 20-25 November 2011, Mar del Plata, Argentina International Scientific Committee Carlos Alejaldre, Spain María Virginia Alves, Brazil Ibere Caldas, Brazil Luis Felipe Delgado-Aparicio, Peru Mayo Villagrán, Mexico Kohnosuke Sato, Japan Héctor Kelly, Argentina Edberto Leal-Quirós, Puerto Rico George Morales, USA Julio Puerta, Venezuela Leopoldo Soto, Chile Michael Tendler, Sweden Carlos Varandas, Portugal Henry Riascos, Colombia Ivan Vargas-Blanco, Costa Rica Local Organizing Committee Luis Bilbao (Chairman) Fernando Minotti (Vice-Chairman) Luis Bernal, UNMDP Alejandro Clausse, PLADEMA-CNEA Graciela Gnavi, INFIP, CONICET-UBA Fausto Gratton, INFIP, CONICET-UBA Diana Grondona, INFIP, CONICET-UBA Héctor Kelly, INFIP, CONICET-UBA Adriana Márquez, INFIP, CONICET-UBA María Milanese, UNCPBA César Moreno, INFIP, CONICET-UBA Sponsors Instituto de Física del Plasma (INFIP) Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) Comisión Nacional de Energía Atómica (CNEA) Agencia Nacional de Promoción Científica y Tecnológica (ANPCyT) Centro Latino-Americano de Física (CLAF) Universidad Nacional de Mar del Plata (UNMP) Universidad Nacional del Centro de la Provincia de Buenos Aires (UNICEN) Academia Nacional de Ciencias de Buenos Aires (ANCBA) Conference poster

Bilbao, Luis; Minotti, Fernando; Kelly, Hector

2012-06-01

298

Spare parts management for nuclear power generation facilities  

NASA Astrophysics Data System (ADS)

With deregulation, utilities in the power sector face a much more urgent imperative to emphasize cost efficiencies as compared to the days of regulation. One major opportunity for cost savings is through reductions in spare parts inventories. Most utilities are accustomed to carrying large volumes of expensive, relatively slow-moving parts because of a high degree of risk-averseness. This attitude towards risk is rooted in the days of regulation. Under regulation, companies recovered capital inventory costs by incorporating them into the base rate charged to their customers. In a deregulated environment, cost recovery is no longer guaranteed. Companies must therefore reexamine their risk profile and develop policies for spare parts inventory that are appropriate for a competitive business environment. This research studies the spare parts inventory management problem in the context of electric utilities, with a focus on nuclear power. It addresses three issues related to this problem: criticality, risk, and policy. With respect to criticality and risk, a methodology is presented that incorporates the use of influence diagrams and the Analytic Hierarchy Process (AHP). A new method is developed for group aggregation in the AHP when Saaty and Vargas' (2007) dispersion test fails and decision makers are unwilling or unable to revise their judgments. With respect to policy, a quantitative model that ranks the importance of keeping a part in inventory and recommends a corresponding stocking policy through the use of numerical simulation is developed. This methodology and its corresponding models will enable utilities that have transitioned from a regulated to a deregulated environment become more competitive in their operations while maintaining safety and reliability standards. Furthermore, the methodology developed is general enough so that other utility plants, especially those in the nuclear sector, will be able to use this approach. In addition to regulated utilities, other industries, such as aerospace, and the military can also benefit from extensions to these models, as risk profiles and subsequent policies can be adjusted to align with the business environment in which each industry or company operates.

Scala, Natalie Michele

299

Pedro García Faria, ingeniero de Caminos (y arquitecto)  

Microsoft Academic Search

Pedro García Faria fue uno de los Ingenieros de Caminos, Canales y Puertos más destacados al servicio de la administración del Estado en España desde finales del siglo XIX hasta principios del XX. El interés que desde los inicios de su carrera profesional mostró por el problema del saneamiento de zonas afectadas por epidemias, le condujeron al reconocimiento profesional de

Miguel Ángel Miranda González

2007-01-01

300

CRISIS FINANCIERA INTERNACIONAL Lo que hemos aprendido y lo que nos queda por aprender  

Microsoft Academic Search

Desde aquel ya lejano, y para mí infausto, día de verano del año 2007 - cuya mañana me cogió en Palm Beach, Florida, en una piscina de hotel leyendo el New York Times mientras tomaba el sol - hasta hoy, he venido siguiendo, con insospechado interés, lo que pasó y lo que está pasando en la economía de los Estados

José Jurado Gil

2009-01-01

301

Desarrollo rural con base en la innovación de las reformas organizativas de trabajo  

Microsoft Academic Search

Al observar desde el medio académico, la crisis tanto social como económica que atraviesa Colombia, sobre todo en su área rural, siendo los más afectados los campesinos, segmento de población inveteradamente menos favorecido por el Estado, es necesario presentar hoy propues- tas de solución a sus problemas y por allí mismo a los del país y sus regiones. Lo que

Juan Guillermo Correa Jaramillo; Fabio Antonio Calle Correa; Diego Alonso Moreno; Sergio Andrés Martínez Jiménez

2004-01-01

302

Los dilemas del desarrollo territorial: repercusiones del zapatismo en la Selva Lacandona de Chiapas1  

Microsoft Academic Search

Este artículo discute los dilemas del desarrollo territorial en la Selva Lacandona. En particular analiza las relaciones entre movimientos sociales, nuevas formas de gobernanza ambiental y desarrollo en esta región del estado de Chiapas, en México. Con base en el llamado enfoque territorial del desarrollo rural (Schejtman y Berdegué, 2004), planteamos que en el contexto actual de globalización, para lograr

Luis Reygadas

303

Prevención de la carencia de hierro en la lactancia, la infancia y la adolescencia  

Microsoft Academic Search

ResumenLa carencia de hierro (CH) es frecuente en lactantes, niños y adolescentes de todo el mundo debido a sus elevadas necesidades de hierro durante el crecimiento, la precaria ingestión de hierro alimentario y la dieta con biodisponibilidad baja. El estado de hierro deficitario se asocia a consecuencias adversas para la salud durante toda la infancia. Las medidas preventivas deben iniciarse

Maria Andersson; Richard F. Hurrell

2010-01-01

304

Más y mejores trenes: Cambiando la matriz de transporte en América Latina y el Caribe  

Microsoft Academic Search

Esta nota técnica aborda el tema de los ferrocarriles de América Latina y el Caribe en sus tres modelos de negocio (Transporte de cargas, de pasajeros urbanos y suburbanos -trenes de cercanías-, y de pasajeros de larga distancia) y su potencial papel en un cambio de matriz de transporte. Se analiza el estado actual del sector y se revisan sus

Jorge Kohon

2011-01-01

305

Manejo de los recursos costeros y marinos en América Latina y el Caribe  

Microsoft Academic Search

El presente documento (ENV-128) expone una estrategia de manejo de los recursos costeros y marinos para el Banco Interamericano de Desarrollo. El manejo costero integrado se presenta como una actividad amplia y polivalente encaminada por un lado a mejorar la calidad de vida de las comunidades que dependen de los recursos costeros y, por otro, a ayudar a los estados

Michele H. Lemay

1998-01-01

306

CARACTERÍSTICAS DE LA POLÍTICA CRIMINAL ADOPTADA POR CUBA EN RELACIÓN AL TRÁFICO Y USO DE LA DROGA, PSICOFÁRMACOS Y OTRAS SUSTANCIAS DE EFECTOS SIMILARES  

Microsoft Academic Search

La droga, psicofármacos y otras sustancias de similares efectos, han ido evolucionando a lo largo de la historia con sus características específicas, de acuerdo a las condiciones de la sociedad, pero en Cuba, este flagelo ha sido atendido y controlado especialmente por las diferentes instituciones de nuestro Estado, debido a las graves consecuencias que acarrea para la población, específicamente para

Yaniuska Pose Roselló

2011-01-01

307

LA IMPORTANCIA DE LA EDUCACIÓN EN HÁBITOS DE VIDA SALUDABLES  

Microsoft Academic Search

Hablar de Salud es no sólo hablar de ausencia de enfermedad física o mental sino también de la presencia de un adecuado entorno personal y afectivo. Un todo que nos lleva a la Felicidad. Salud es bienestar general, buen estado físico y psíquico, alegría, ganas de vivir, de relacionarse con otras personas, de disfrutar, de libertad, de paz. Por tanto,

Eva Maria Rodriguez Cobos

2009-01-01

308

El dolor como terapia. La médula común de los campos de concentración nazis y franquistas  

Microsoft Academic Search

Los campos de concentración franquistas y los nazis evidencian un cuerpo común. En ambos se desarrollaba una terapia para los internos que tenía al cuerpo como vehículo de aprendizaje. El tratamiento político prescribía penalidades físicas — la suciedad, el hambre, la sed— y morales que debían conducir a los prisioneros a comprender la finalidad buscada por el Estado totalitario alemán

Mirta Núñez Díaz-Balart

2005-01-01

309

LAS ESTRUCTURAS SOCIALES DE LA ECONOMÍA: EN PIERRE BOURDIEU  

Microsoft Academic Search

Los últimos acontecimientos dentro y fuera de los Estados Unidos en materia económica llevan a re-pensar el rol que juegan tanto la propiedad inmobiliaria como la propiedad en general dentro de nuestras conceptualizaciones y sistema económico. En ese contexto, se inscribe el trabajo del sociólogo francés Pierre Bourdieu titulado Las Estructuras Sociales de la Economía. Originalmente, el autor comienza uno

Maximiliano E. Korstanje

2009-01-01

310

¿QUÉ ES EL TURISMO?  

Microsoft Academic Search

El turismo se presenta hoy día como una actividad que produce un intenso intercambio de personas y mercancías (Ascanio, 2007). Aquellos estados que requieren fomentar el turismo intentan celebrar convenios de reciprocidad o facilidades para el intercambio mencionado. Esos convenios pueden estar orientados sólo hacia las mercancías, hacia las personas o ambas. En este sentido, el visado o el permiso

Maximiliano Korstanje

2011-01-01

311

LOS MANTEROS DE LA CALLE FLORIDA: TEORÍA DE LA CAPITALIZACIÓN DEL VÍNCULO  

Microsoft Academic Search

El presente trabajo de revisión cuestiona de raíz la tesis de los no lugares y toma como objeto de estudio el conflicto acaecido en los últimos meses entre los manteros de la calle Florida y el Estado circunscripto a la ciudad de Buenos Aires. Para los primeros, existía un derecho a instalarse en un espacio público por motivos laborales mientras

Maximiliano Korstanje

2012-01-01

312

Aplicación de un Enfoque Intencional al Análisis de Variabilidad  

Microsoft Academic Search

El interés por el estudio de la variabilidad, es decir la habilidad de cambio o adaptación de un sistema, ha aumentado significativamente durante los últimos años. Esto se debe a su utilidad en diversos campos, desde la personalización del software a las líneas de producto o la adaptación automática de sistemas. Dicho estudio ha estado centrado principalmente en cuestiones de

Bruno González-Baixauli; Miguel A. Laguna; Sampaio do Prado

2005-01-01

313

EVALUATION OF THE STATUS OF RANGELAND HEALTH: TOWARDS THE FUTURE  

Technology Transfer Automated Retrieval System (TEKTRAN)

En los últimos años se ha mejorado mucho la evaluación del estado de salud de los pastizales con la integración de conceptos ecológicos. La guía “Interpreting Indicators of Rangeland Health”, versión 3, fue desarrollada con el objetivo de proveer una evaluación rápida de la salud de los pastizales. ...

314

Sintomas Depressivos e Qualidade de Vida em Indivíduos com Epilepsia por Esclerose Mesial Temporal  

Microsoft Academic Search

RESUMO Introdução: Dificuldades no trabalho, em relacionamentos interpessoais, familiares e sociais, a percepção do estigma, da discriminação dentre outros têm sido associados aos estados depressivos interictais, influen- ciando negativamente a qualidade de vida (QV) das pessoas com epilepsia. A depressão tem alta prevalência (20 a 55%) nas epilepsias, sendo vista como o fator mais importante no julgamento do paciente sobre

Neide Barreira Alonso; Tatiana Indelicato da Silva; Ana Carolina Westphal; Auro Mauro Azevedo

315

El Instituto Nacional del Cáncer publica nuevo atlas de mortalidad por cáncer  

Cancer.gov

El Instituto Nacional del Cáncer (NCI, por sus siglas en inglés) ha publicado un nuevo atlas, el Atlas de Mortalidad por Cáncer en los Estados Unidos, 1950-94, que muestra los patrones geográficos de las tasas de mortalidad por cáncer durante más de cuatro décadas, en más de 3.000 condados a lo largo del país.

316

MAPEAMENTO DO ESTILO DE APRENDIZAGEM DA AGROINDUSTRIA DE CARNE BOVINA EM GOIÁS  

Microsoft Academic Search

O mapeamento do estilo de aprendizagem é a medição da forma de adquirir conhecimento de um indivíduo ou grupo, uma ferramenta desenvolvida por Felder-Silverman aplicada na pesquisa com o objetivo de analisar os cargos e funções das agroindústrias de carne bovina do estado de Goiás. Os quatro estilos de aprendizagem desenvolvidos pela ferramenta possibilitaram chegar ao estilo do segmento: ATIVO,

MARCÉLIO OLIVEIRA RODRIGUES; Reginaldo Santana Figueiredo; Odilon Jose De Oliveira Neto

2008-01-01

317

Movilizaciones étnicas y crítica civilizatoria. Un cuestionamiento a los proyectos estatales en América Latina  

Microsoft Academic Search

Resumen La exposición de la historia y las motivaciones occidentales en las coyunturas de expansión colonial, así como las lógicas políticas de los estados uninacionales que continuaron su dominio sobre los pueblos nativos, han sido abordadas desde muy distintos puntos de vista. Sin embargo, creo que no se ha insisti- do los suficiente sobre las transformaciones sufridas por las colectividades

MIGUEL ALBERTO BARTOLOMÉ

318

A LEI DE RESPONSABILIDADE FISCAL E SEU IMPACTO SOBRE A ORDEM FISCAL NOS MUNICÍPIOS DO RIO GRANDE DO SUL  

Microsoft Academic Search

RESUMO: Em 2000, entrou em vigor a Lei Complementar nº 101 a chamada Lei de Responsabilidade Fiscal (LRF). Surge com o intuito de limitar o endividamento da União, dos Estados e Municípios, ao passo que define os princípios básicos de responsabilidade, derivados da noção de prudência na gestão de recursos públicos. O presente trabalho tem por objetivo avaliar o impacto

Daiane Londero; Daniel Lena; Marchiori Neto; Gilberto Veloso

319

Nova ocorrência de Asiatoceratodus (Osteichthyes, Dipnoiformes) na Formação Alcântara, Eocenomaniano da bacia de São Luís, MA, Brasil  

Microsoft Academic Search

RESUMO - O Cretáceo médio está bem representado na Bacia de São Luís pelos depósitos predominantemente areníticos da Formação Alcântara. Na Ilha do Cajual, norte do Estado do Maranhão, nordeste do Brasil, uma paleocomunidade continental datada como de idade eocenomaniana inclui vegetais, peixes, crocodilomorfos e dinossauros. Duas placas dentárias, coletadas em uma fácies conglomerática, com sete cristas arranjadas de forma

DARCILÉA FERREIRA CASTRO; EDUARDO VIEIRA; MANUEL ALFREDO MEDEIROS

2004-01-01

320

El papel de las Brigadas Internationales en el cine documental extranjero (1936-1939)  

Microsoft Academic Search

El cine fue utilizado como elemento de propaganda durante la Guerra Civil española. Las Brigadas Internacionales nunca tuvieron una productora cinematográfica propia. Por esta razón, algunos documentales fueron filmados en el Reino Unido, los Estados Unidos y Francia, producidos por organismos progresistas. La estructura interna de los brigadistas no es analizada, pero se destaca su solidaridad en la lucha contra

Magi Crusells

2004-01-01

321

A LEITURA DO MUNDO ATRAVÉS DE TEXTOS LITERÁRIOS E IMAGÉTICOS  

Microsoft Academic Search

RESUMO: Este trabalho é parte integrante do processo de formação continuada desenvolvido pela Secretaria de Estado da Educação do Paraná, através do Programa de Desenvolvimento Educacional (PDE). A proposta deste artigo é refletir sobre a importância da leitura imagética e literária críticas no ambiente escolar - especificamente no Ensino Médio -, partindo de seu conceito, passando pela teoria semiótica e

Andréa Fleury; Sérgio Paulo

322

La historia orbital de Deimos y la oblicuidad de Marte  

Microsoft Academic Search

Recientemente, se ha demostrado mediante extensas integraciones numéricas, que la rotación de Marte pasó repetidamente por estados caóticos de movimiento, debido al pasaje por zonas de resonancia spin - órbita. En dichas circunstancias, la oblicuidad marciana pudo haber sufrido grandes excursiones de varias decenas de grados. Las consecuencias de dichas variaciones son de extrema importancia en el contexto de la

A. Brunini; T. Yokoyama

1996-01-01

323

TRATAMIENTO FISCAL DE LOS FACTORES DE RIESGO PARA LA SALUD Y DEL GASTO SANITARIO: REVISIÓN Y PROPUESTAS DE REFORMA  

Microsoft Academic Search

El presente trabajo revisa algunos de los aspectos más destacables de la fiscalidad sobre el consumo de bienes nocivos como instrumento de intervención vinculada a las políticas de salud y a la corrección del fallo de mercado. El objetivo no es otro que el de repasar el estado de conocimiento al respecto, destacando las variables que delimitan el marco de

Guillém López Casasnovas; Esther Martínez García

2001-01-01

324

The Educational Narrativity in the First Period of Oliveira Salazar's Government. Women's Voices in the National Assembly (1935-1945)  

ERIC Educational Resources Information Center

|Oliveira Salazar's accession to the government followed the military coup of 1926, which put an end to the period of democratic republican life. The Constitution approved in 1933 defined the new regime, which came to be known as "Estado Novo". Ideologically sustained by an anti-liberal concept of Catholicism, this political regime would grant…

Adao, Aurea; Remedios, Maria Jose

2005-01-01

325

Vegetais fósseis do Terciário brasileiro  

Microsoft Academic Search

A bacia de Fonseca, situada na região do Quadrilátero Ferrífero, no estado de Minas Gerais, sudeste do Brasil, constitui um clássico exemplo de sedimentos terciários, tendo despertado o interesse de vários pesquisadores, desde a segunda metade do século passado, por conter depósitos de \\

Claudio Limeira Mello; Lílian Paglarelli Bergqvist; Lucy Gomes Sant

326

MÚSICA Y AGRUPACIONES DE CARNAVAL A FINALES DEL SIGLO XX EN ANDALUCÍA OCCIDENTAL. LA REVITALIZACIÓN FESTIVA Y EL RENACIMIENTO DEL CARNAVAL  

Microsoft Academic Search

Con este trabajo pretendemos acercarnos al Carnaval de Andalucía occidental a partir de su recuperación durante la Transición y los gobiernos socialistas en la década de los años ochenta del pasado siglo XX. Este proceso tuvo lugar en un marco de participación ciudadana, modernización económica, estado del bienestar, constitución de las comunidades autónomas, sociedad del espectáculo y del entretenimiento, y

Francisco José García Gallardo

2005-01-01

327

La política de vivienda de interés social en Colombia en los noventa  

Microsoft Academic Search

Este trabajo analiza el desarrollo de la política de vivienda de interés social en Colombia a partir de 1991, cuando se adoptó el sistema de subsidios a la demanda. Este sistema sustituyó al antiguo esquema en el cual el Estado era directamente constructor de viviendas, proveedor de créditos y de subsidios. La nueva política persigue incrementar la demanda efectiva de

María Luisa Chiappe de Villa

1999-01-01

328

Declaración del Instituto Nacional del Cáncer sobre los exámenes selectivos de detección de cáncer de seno  

Cancer.gov

El Instituto Nacional del Cáncer (NCI) agradece la cuidadosa revisión y análisis que ha hecho la Brigada de Servicios Preventivos de los Estados Unidos de la evidencia con respecto a los exámenes de detección de cáncer de seno para mujeres que tienen un riesgo del promedio.Preguntas y Repuestas

329

Late Quaternary palaeoenvironmental change in western Staaten Island (54.5° S, 64° W), Fuegian Archipelago  

Microsoft Academic Search

Late Glacial – Holocene environmental conditions were interpreted in western Isla de los Estados (Staaten Island) from geomorphological and palynological analysis. The geomorphological data from Caleta Lacroix (54°50? S; 64 40? W) indicate the presence of a fossil dune field that suggest exposition of a larger land surface and stronger wind intensity predominantly from SW and W probably during Late Glacial

Ponce Juan Federico; Borromei Ana María; Rabassa Jorge Oscar; Martinez Oscar

2011-01-01

330

Application of FTIR-HATR spectroscopy and multivariate analysis to the quantification of adulterants in Mexican honeys  

Microsoft Academic Search

Fourier transform infrared (FTIR) spectroscopy with attenuated total reflectance (ATR) accessory was used to quantify three different adulterants (corn syrup, high fructose corn syrup and inverted sugar) in honeys of four different locations of México (Chiapas, Oaxaca, Estado de México and Morelos). The optimal calibrations for the three adulterants were developed with partial least squares (PLS). The developed models were

Tzayhri Gallardo-Velázquez; Guillermo Osorio-Revilla; Marlene Zuñiga-de Loa; Yadira Rivera-Espinoza

2009-01-01

331

Efficacy of long-term obesity's treatment with diethylpropion  

Microsoft Academic Search

4 1 MD, MS, MBA, FACN, MFICAN, Head membership of the Board of Directors of Associação Brasileira de Nutrologia (ABRAN\\/Brazil), director of the Department of Prevention and Treatment of Overweight and Obesity - ABRAN\\/Brazil, chief of the Ambulatory of Prevention and Treatment of Overweight and Obesity of ABRAN - Regional Estado do Rio de Janeiro\\/Brazil, master in Medical Sciences (Neurophysiology's

Paulo Giorelli; Durval Ribas-Filho; Socorro Giorelli; Guilherme Giorelli

2008-01-01

332

Valoración Económica y Ambiental Aplicada a Casos del Manejo de la Calidad del Aire y Control de la Contaminación  

Microsoft Academic Search

Este documento fue comisionado por la Red de Medio Ambiente del Diálogo Regional de Política para la III Reunión Hemisférica celebrada los días 9 y 10 de marzo de 2004. Durante las últimas décadas se han establecido derechos y obligaciones ciudadanas; se han definido las funciones del Estado y de los organismos públicos responsables en materia ambiental; se han realizado

Luis A. Cifuentes; Luis Rizzi; Héctor Jorquera; Javier Vergara

2004-01-01

333

POLÍTICAS PÚBLICAS E AÇÕES POPULARES: O CASO DOS ALAGADOS - SALVADOR\\/BA  

Microsoft Academic Search

Resumo: Esta pesquisa analisa o papel das políticas públicas no processo de produção do solo urbano nos Alagados e as implicações dos movimentos populares reivindicando seu direito à cidade. Parte-se do princípio de que tais intervenções do Estado e da comunidade foram relevantes para a continuidade da luta pela morada e pela vida nos Alagados. Busca-se desvendar as contradições das

Janio Santos

2005-01-01

334

Desempenho de um trator operando em solo com diferentes tipos de cobertura vegetal  

Microsoft Academic Search

RESUMO: A eficiência de um trator para desenvolver esforço tratório depende da interação entre o rodado e o solo, envolvendo um complexo conjunto de fatores: característica do rodado, patinagem, transferência de peso do trator, tipo de solo, umidade, estado de compactação, tipo de cobertura do solo, entre outros, que proporcionam diferentes condições de trabalho e interferem no desempenho do trator.

Antonio Gabriel Filho; Suedêmio de L. Silva; Alcir J. Modolo; João C. M. da Silveira

2004-01-01

335

FOTOSSENSIBILIZAÇÃO EM ANIMAIS DE PRODUÇÃO NA REGIÃO SEMI-ÁRIDA DO RIO GRANDE DO NORTE  

Microsoft Academic Search

O presente trabalho objetivou estudar a ocorrência de surtos naturais de fotossensibilização que vêm ocorrendo em diversas espécies animais na região semi-árida do Estado do Rio Grande do Norte. Foram visitadas 17 propriedades nas quais estavam ocorrendo casos naturais desta patologia. Foram realizadas entrevistas com os tratadores, exames clínicos e provas séricas bioquímicas de função hepática nos animais afetados. Também

M. F. Macedo; M. B. Bezerra; B. Soto Blanco

336

Health-related fitness assessment in childhood and adolescence: a European approach based on the AVENA, EYHS and HELENA studies  

Microsoft Academic Search

Results from cross-sectional and longitudinal studies such as Alimentación y Valoración del Estado Nutricional en Adolescentes: Food and Assessment of the Nutritional Status of Spanish Adolescents (AVENA) and the European Youth Heart Study (EYHS) respectively, highlight physical fitness as a key health marker in childhood and adolescence. Moderate and vigourous levels of physical activity stimulate functional adaptation of all tissues

Jonatan R. Ruiz; Francisco B. Ortega; Angel Gutierrez; Dirk Meusel; Michael Sjöström; Manuel J. Castillo

2006-01-01

337

Sensoriamento Remoto de Sistemas Aquaticos (Remote Sensing of Aquatic System).  

National Technical Information Service (NTIS)

This is the first technical report of the 'Remote Sensing of the Aquatic Systems' Project sent to the 'Fundasao de Amparo a Pesquisa do Estado de Sao Paulo' describing the activities performed between May 1989 and June 1990. The methodology and technical ...

E. M. Leaodemoraesnovo C. Z. F. Braga

1991-01-01

338

REDE DE DINAMIZAÇÃO DAS FEIRAS DA AGRICULTURA FAMILIAR – REDIFEIRA: UMA ALTERNATIVA PARA A INCLUSÃO SOCIOECONÔMICA DAS FAMÍLIAS RURAIS  

Microsoft Academic Search

A Rede de Dinamização das Feiras da Agricultura Familiar – REDIfeira, projeto integrante do Programa de Extensão Universitária – Universidade Sem Fronteiras, da Secretaria de Ciência, Tecnologia e Ensino Superior (SETI) do Governo do Estado do Paraná, tem como objetivo, dinamizar a produção e a comercialização dos produtos produzidos pela Agricultura Familiar nos municípios do Programa de Desenvolvimento da Região

Ednaldo Michellon; Tiago Ribeiro Costa; Gisiane July Stroher; Lucas Souza Camacho; Paulo Sipoli Pereira

2008-01-01

339

ESTILO DE VIDA DE PROFESSORES UNIVERSITÁRIOS: UMA ESTRATÉGIA PARA A PROMOÇÃO DA SAÚDE DO TRABALHADOR Lifestyle of university professors: a strategy for worker's health promotion  

Microsoft Academic Search

RESUMO Objetivo: Avaliar o estilo de vida de professores universitários, verificando a existência de associação com fatores sócio-demográficos (sexo, idade, estado civil, classificação sócio- econômica) e ocupacionais (tempo e regime de trabalho). Método: Estudo transversal com características descritivas. A amostra foi composta por 76 professores selecionados aleatoriamente, que responderam voluntariamente o instrumento de coleta de informações composto de três partes:

Marcos Henrique Fernandes; Almeida LGD; Rocha VM; Gomes Porto; Dias de Almeida; Vera Maria da Rocha

340

ARTE RUPESTRE EN ASENTAMIENTOS DEL PERÍODO TARDÍO EN LOS VALLES DE LLUTA Y AZAPA, NORTE DE CHILE ROCK ART IN LATE HORIZON SETTLEMENTS IN THE VALLEYS OF LLUTA AND AZAPA, NORTHERN CHILE  

Microsoft Academic Search

Este trabajo busca contribuir a la discusión sobre el proceso de expansión del estado Inka hacia las áreas periféricas del sur de los Andes, particularmente en los valles costeros Lluta y Azapa del extremo norte de Chile. Este proceso es analizado explorando el rol del arte rupestre -como soporte material de transmisión de ideología- en el proceso de integración que

Daniela Valenzuela; Calogero M. Santoro; Álvaro Romero

2004-01-01

341

Proyecto para prestación de servicios \\  

Microsoft Academic Search

Esta presentación fue expuesta durante el Tercer Encuentro Técnico de Capacitación en Materia de Estructuración de Proyectos de Asociación Público-Privada, llevado a cabo en Mérida, Yucatán, México, el 20, 21 y 22 de enero de 2010. El Plan de Desarrollo del Estado de México 2005-2011 establece que se debe generar un acceso de calidad a los servicios de salud, para

Miguel Donovan

2010-01-01

342

The Politics of Re-Territorialisation: Space, Scale and Teachers as a Professional Class  

Microsoft Academic Search

Resumo Este artigo, utilizando escala, espaço e território como quadro conceitual, busca explorar a mudança das relações de classe social para o professorado como resultado da reestruturação, juntamente com as implicações estratégicas das lutas políticas organizadas pelo magistério e os meios tradicionais de apresentação de seus interesses. Inicia, primeiro, com alguns comentários breves sobre globalização e reestruturação do estado e

Susan L. Robertson

2002-01-01

343

Different views over Hansen's Disease Control Program actions: the health care professionals' perspective in Brazil  

Microsoft Academic Search

RESUMO Baseado na percepção dos profissionais de saúde envolvidos nas ações de gerência e assistência do Programa de Controle da Hanseníase desenvolveu-se estudo qualitativo para construção do contexto real dessas ações. Foram incluídos profissionais de estados da região Norte e Nordeste que participaram de Oficinas de Pesquisas Operacionais realizadas em 2006. No total, 16 profissionais participaram do estudo, tendo como

Alberto Novaes Ramos Jr; Maria Vaudelice Mot; Duane Hinders; Márcia Gomide da Silva

344

Muerte súbita en el deportista. Requerimientos mínimos antes de realizar deporte de competición  

Microsoft Academic Search

Para la mayor parte de nuestra sociedad los de- portistas representan el estado de máxima salud, por lo que aun siendo muy infrecuente, la muerte súbita de un deportista joven es siempre un acon- tecimiento con un gran impacto social y que pro- voca una gran inquietud en su entorno (médicos, deportistas, entrenadores, etc.). Esto, unido al pro- gresivo incremento

Araceli Boraita Pérez; Luis Serratosa Fernández; Consejo Superior de Deportes

345

Les disparités internationales de comportements d'épargne  

Microsoft Academic Search

[spa] Las disparidades internacionales de comportamientos de ahorro. Un análisis de los Estados Unidos, del Japon y de Europa a través del ciclo de vida - La concentración persistente de los desequilibrios exteriores en ciertos países índustrializados constituye un problema mayor en los años ochenta. La misma no refleja solo fenómenos reales o monetarios (competitividad, especialización, tasas de cambio) sino

Virginie Coudert

1990-01-01

346

COMPORTAMIENTO DE Ca, Mg Y KEN RESPUESTA A LA APLICACION DE FERTILIZANTE POTASICO Y DE CAL DOLOMITICA EN UN ANDISOL DE LA ZONA SUR DE COSTA RICA 1  

Microsoft Academic Search

Con el objetivo de estudiar el estado y el com- Behavior of Ca, Mg and K under potasic portamiento de Ca, Mg y K tanto en el suelo como fertilizer and dolomitic liming in a Costa en la planta, asi como sus posibles intelrelaciones, se Rican Andisol. An experiment was established sembro un ensayo sobre un Typic Hapludand de baja

Carlos Henriquez; Floria Bertsch

347

Fallas estructurales del mercado de maíz. Comentario a Robles y García  

Microsoft Academic Search

El artículo es un esfuerzo valioso por parte de economistas para poner (por fin) a funcionar el instrumental de la teoría económica sobre un tema del que sólo parecen ocuparse antropólogos y agrónomos. La carencia de investigación empírica y de reflexión analítica sobre aspectos centrales de la realidad económica del país habla mal del estado que guarda la disciplina de

Ángel Palerm

1995-01-01

348

The environmental science and economic growth  

Microsoft Academic Search

Las acciones derivadas de la política económica deben tender, en términos generales, al logro del desarrollo económico. Este habrá de traducirse en bienestar social y en el mejoramiento de la calidad de la vida. El papel del Estado es fundamental en la formulación de tal política y en la vigilancia para que se cumpla. De esta manera se espera que

Nicolás Sánchez

1988-01-01

349

Acute respiratory infections control in the context of the IMCI strategy in the Americas Controle das infecções respiratórias agudas no contexto da estrategia AIDPI nas Américas  

Microsoft Academic Search

As infecções respiratórias agudas (IRA) são importante causa de morbidade e mortalidade em menores de cinco anos. Importantes contrastes são observados em relação a isto nos diferentes países das Américas, e também entre regiões ou estados de um mesmo país. A morbidade está associdada a vários fatores, especialmente com a situação nutri- cional das pacientes e o tempo de aleitamento

Yehuda Benguigui

350

Crimen en Colombia: análisis y sugerencias de política  

Microsoft Academic Search

Introducción: Las tasas de homicidio en Colombia están entre las más altas del mundo. En el pico de 1991, casi mil colombianos fueron asesinados en un año. La tasa de homicidios en Colombia es tres veces más alta que la de Brasil o México, y diez veces mayor que la de Argentina, Uruguay o que la de los Estados Unidos.

Levitt Steven; Mauricio Rubio

2000-01-01

351

Asambleas tribales , \\  

Microsoft Academic Search

Durante años mis temas de investigación y de intervención en el campo de las adicciones han estado atravesados por las dimensiones de género (diferencias en las modalidades de adicción para las mujeres y los varones, y formas de ayudar específicas en cada caso) y por la relación entre la adicción a sustancias y los abusos (maltratos, violencia) hacia las personas.

Cristina Ravazzola

352

Una revisión de los beneficios del aporte complementario de nutrientes durante el embarazo: desde hierro y ácido fólico hasta probióticos pasando por ácidos grasos poliinsaturados de cadena larga  

Microsoft Academic Search

ResumenEn esta revisión se resume el conocimiento actual sobre la eficacia de los aportes complementarios prenatales de nutrientes, desde hierro y ácido fólico (HAF), que representan el patrón asistencial en muchas partes del mundo, hasta los más novedosos como ácidos grasos ?–3 y probióticos, en la mejora de los desenlaces del estado de salud materno-infantil. En ensayos aleatorios controlados se

Usha Ramakrishnan

2010-01-01

353

Toxicología Postmortem: estudio analítico de cocaína en cerebro  

Microsoft Academic Search

Resumen: El screening de drogas de abuso postmortem en casos de presunta causa de muerte por sobredosis es un análisis habitual en todos los laboratorios toxicológicos. La matriz más utilizada y común para el estudio es la sangre debido a su relación temporal con los efectos en el individuo y su estado en el momento de la muerte. Otras matrices

Mora A; Arroyo A; Sánchez M

2008-01-01

354

Macro Volatility and Financial Institutions  

Microsoft Academic Search

In 2004, with support from IDRC, CEDES (Centro de Estudios de Estado y Sociedad) launched a global project to generate proposals for the reform of national financial institutions in developing countries, and for the building of global and regional financial architectures needed to support their development. Specialized teams led by local researchers from Thailand, China, South Africa, Nigeria, Russia, Brazil,

José María Fanelli

355

DESARROLLO Y PROVISIÓN INICIAL DE ENTRENAMIENTO INTENSIVO EN LAS HABILIDADES SOCIALES Y PREPARACIÓN PARA EL TRABAJO EN ADULTOS CON TRAUMATISMO ENCÉFALO-CRANEAL: POSIBILIDADES DE REPLICACIÓN EN EL RÍO DE LA PLATA  

Microsoft Academic Search

Resumen Los déficit en habilidades sociales luego de traumatismo encéfalo-craneal severo son predominantes. Sin embargo, el desarrollo y la provisión de tratamientos preventivos durante el proceso de rehabilita- ción no han estado a la par de las necesidades en esta área. Este estudio describe el desarrollo conceptual y la provisión inicial de programas intensivos de entrenamiento de habilidades sociales y

THOMAS D. UPTON; PAOLA PREMUDA; JAMES BORDIERI

356

SÍTIOS DE NIDIFICAÇÃO DE TUIUIÚ Jabiru mycteria (AVES: CICONIIDAE) NO PANTANAL DE POCONÉ, MATO GROSSO  

Microsoft Academic Search

RESUMO: Foram estudados 120 ninhos de tuiuiú (Jabiru mycteria), durante três estações reprodutivas consecutivas de 1995 a 1977, na Estrada-Parque Transpantaneira e fazendas limítrofes, localizadas no Pantanal de Poconé, no Estado de Mato Grosso. Foram caracterizadas e monitoradas as árvores que serviam de suporte aos ninhos de tuiuiú, medidos a altura do ninho ao solo, o ângulo do galho com

DALCI MAURÍCIO MIRANDA DE OLIVEIRA; ROBERTO BRANDÃO

357

Notes on the Seven-coloured Tanager Tangara fastuosa in north-east Brazil  

Microsoft Academic Search

São apresentadas novas localidades de ocorrência e extensões de distribuição geográfica para o pintor-verdadeiro Tangara fastuosa, uma espécie endêmica e ameaçada de extinção, que ocorre apenas em ambientes florestais dos estados do Rio Grande do Norte até Alagoas, no nordeste brasileiro. São reportados também novos dados sobre preferências de habitat, comportamento, ecologia e conservação desta espécie. A distribuição geográfica deste

Luís Fábio Silveira; Fábio Olmos; Sônia Aline Roda; Adrian J. Long

358

RESPUESTA TEMPORAL A H2 DE CAPACITORES MOS CON COMPUERTA DE Mo TEMPORAL RESPONSE TO H2 IN Mo GATE MOS CAPACITORS  

Microsoft Academic Search

. La fotocorriente inducida por iluminación pulsada, de un capacitor MOS con compuerta de Mo, provisto de ventana óptica, se emplea como monitor de su estado de carga, frente a estímulos químicos con concentraciones crecientes de H2 en N2 de hasta 1000 ppm. Se describen las respuestas inducidas por transporte a la interfaz metal-dieléctrico. Los resultados confirman que la sensibilidad

R. M. Lombardi; R. Aragón

359

Mecanismos psicofisiológicos implicados en la regulación afectiva y la restricción alimentaria de mujeres con riesgo de padecer bulimia nerviosa  

Microsoft Academic Search

El objetivo del estudio fue conocer el efecto de visualizar imágenes de comida bajo diferentes estados de ánimo y diferentes condiciones de restricción alimentaria en la modulación emocional de dos refle- jos defensivos (sobresalto motor y defensa cardiaca). 72 mujeres con riesgo de padecer bulimia ner- viosa fueron asignadas a dos grupos: 1) un grupo al que se inducía un

Sonia Rodríguez; José Luis Mata; Silvia Moreno; Jaime Vila

2007-01-01

360

Lifelines-Pancreatic-Cancer-SPA-2013  

Cancer.gov

LOS HISPANOS Y EL CÁNCER DE PÁNCREAS: COSAS PARA SABER por el Instituto Nacional del Cáncer Una de las causas principales de muerte relacionadas con el cáncer en los hispanos o latinos de los Estados Unidos es una enfermedad poco común pero con frecuencia

361

Empresa y entorno económico, experiencia del Grupo de Estudios en Economía y Empresa de la Universidad Eafit  

Microsoft Academic Search

En este artículo se presentan los fundamentos conceptuales de la Política Coyuntural de la Empresa, la cual considera que los estados financieros de las empresas reflejan sus relaciones con el entorno, y las aplicaciones realizadas por el Grupo de Estudios en Economía y Empresa. Luego de introducir los principios fundamentales, se trata el tema de la visión de la empresa

Javier Santiago Ortiz

2004-01-01

362

PIGMENTATION CHARACTERS: AN EXAMPLE OF SANKOFF CHARACTERS FROM TINAMOU PHYLOGENY  

Microsoft Academic Search

Resumen. - Caracteres de pigmentación: ejemplos de caracteres de Sankoff en una filogenia de perdices. - En un análisis cladístico de perdices, se prestó una atención especial a la definición y codifica- ción de caracteres tradicionalmente cuestionados para la filogenia en aves. Por ejemplo, se definieron cos- tos de transformación entre estados (caracteres de Sankoff) para analizar los colores de

Sara Bertelli

2004-01-01

363

FENOLOGIA REPRODUCTIVA EN TRES TIPOS DE VEGETACION DE LA PLANICIE COSTERA DE LA PENINSULA DE PARAGUANA, VENEZUELA  

Microsoft Academic Search

Reproductive phenology of 51 plant species was evaluated according to life form and vegetation types in a coastal plain of the Paraguaná Peninsula, Estado Falcón, Venezuela. Plant species distribution according to three vegetation types (herbaceous littoral, herbaceous psamophil, and mangrove area) was determined. Life form frequency was different according to vegetation type. Herbaceous littoral and herbaceous psamophil vegetation were dominated

Luis José Lemus-Jiménez; Nelson Ramírez

364

Teoría de los bienes públicos y aplicaciones prácticas. Presentación de un número monográfico sobre“Bienes públicos”\\/The Theory of Public Goods and its Empirical Applications. Introduction to a Monographic Issue on Public Goods  

Microsoft Academic Search

Se ofrece un panorama muy breve del estado actual de la teoría de los bienes públicos y de sus aplicaciones prácticas, esto es, de los estudios empíricos sobre la demanda y provisión de bienes públicos, así como de algunas de las limitaciones tanto teóricas como empíricas que han surgido en los últimos años. A continuación se presentan los artículos incluidos

FRANCISCO JAVIER BRAÑA PINO

2004-01-01

365

Processamento cognitivo \\  

Microsoft Academic Search

Resumo Objetivo: O transtorno afetivo bipolar está associado ao comprometimento funcional persistente. Apesar de muitas pesquisas demon- strarem que bipolares podem apresentar déficits cognitivos, um número menor de trabalhos avaliou o papel de prejuízos no proces- samento cognitivo social, a Teoria da Mente (relacionado à capacidade de inferir estados mentais), no aparecimento de sintomas e complicações sociais em bipolares. O

Hélio Anderson Tonelli

2009-01-01

366

Multivariant analysis in anthropometric indexes and energy intake in university students  

Microsoft Academic Search

Resumo - O excesso de peso é considerado uma epidemia que afeta muitos indivíduos no mundo e a sua prevenção é um desafio para os pesquisadores da área da Saúde Pública. Através da antropometria e do estudo da ingestão energética e a sua associação, podemos inferir o estado nutricional dos sujeitos. Nosso objetivo é estudar a relação entre os índices

Mauricio Jesús; Rivas Gil; Elia Margarita; Lagrange de Castillo; Hector Antonio Herrera Mogollón; Gloria Cabral

367

Estudio para la prevención del cáncer necesita voluntarias: El Estudio del Tamoxifeno y Raloxifeno (STAR) se realiza en Norteamérica  

Cancer.gov

El Estudio del Tamoxifeno y Raloxifeno (STAR, por sus siglas en inglés), uno de los estudios más importantes realizados para la prevención del cáncer del seno, está ahora reclutando voluntarias en más de 400 centros en los Estados Unidos, Puerto Rico y Canadá.

368

PROTECÇÃO PATRIMONIAL & DESENVOLVIMENTO TERRITORIAL. Três Casos Internacionais: Stonehenge, Dordonha, Aragão  

Microsoft Academic Search

** Resumo : Os Estados e as suas administrações públicas detêm um papel preponderante nos domínios da protecção patrimonial e do desenvolvimento territorial. Com efeito, se por um lado a intervenção dos agentes públicos se justifica pela necessidade de potenciar melhorias nas condições de vida das populações, por outro lado, vários são os desafios que se colocam na definição das

Fernando Pau-Preto

369

Reporting on health-related research in two prestigious Brazilian newspapers  

PubMed Central

OBJECTIVES: The dissemination of health-related news through newspapers can influence the behavior of patients and of health care providers. We conducted a study to analyze the characteristics of health-related research published by two leading Brazilian newspapers. METHOD: We retrospectively evaluated health-related news published in the electronic versions of the newspapers Folha de São Paulo and O Estado de São Paulo over a period of three months (July through September, 2009). Only articles mentioning medical research were included. The articles were categorized according to topic, source, study location and the nature of the headline. We also analyzed the presence of background information on the topic, citations of medical periodicals, national contextualization and references to products or companies. RESULTS: Scientific research articles corresponded to 57% and 20% of health-related articles published by Folha de São Paulo and O Estado de São Paulo, respectively. Folha de São Paulo published significantly more articles about national studies, and most articles were written by its own staff. In contrast, most articles in O Estado de São Paulo came from news agencies. Folha de São Paulo also better contextualized its reports for Brazilian society. O Estado de São Paulo tended to cite the name of the periodical in which the study was published more frequently, but their articles lacked national contextualization. CONCLUSION: The results showed a significant difference in the way in which the studied newspapers report on health-related research. Folha de São Paulo tends to write its own articles and more frequently publishes the results of national research, whereas O Estado de São Paulo publishes articles that originate in news agencies, most of which have little national contextualization.

Teixeira, Ricardo Afonso; Carlini, Marcela; de Carvalho Jatoba e Sousa, Arthur; Fernandes, Paula Teixeira; Camargo, Vera Regina Toledo; Vogt, Carlos; Li, Li Min

2012-01-01

370

PFI-ZEKE (Pulsed Field Ionization-Zero Electron Kinetic Energy) para el estudio de iones  

NASA Astrophysics Data System (ADS)

Entre las áreas hacia donde ha evolucionado la Química en los últimos años están los estudios de sistemas con especies reactivas de alta energía y los dominados por fuerzas intermoleculares débiles, con energías de unas pocas kcal/mol. En efecto, el estudio de las propiedades de los iones, comenzando por su relación con la molécula neutra de la que procede, la energía de ionización, los estados vibracionales y rotacionales, energías de enlace de Van der Waals entre el ión y una amplia variedad de otras moléculas, sus confórmeros o isómeros y sus reacciones o semi-reacciones químicas están en la raíz de la necesidad de la espectroscopía conocida como PFI-ZEKE, Pulsed Field Ionization-Zero Electron Kinetic Energy. Entre las aplicaciones que requieren estos conocimientos se encuentran la generación de plasmas para la fabricación de semiconductores, memorias magnéticas, etc, así como los sistemas astrofísicos, la ionosfera terrestre, etc. La espectroscopía ZEKE es una evolución de las de fluorescencia inducida por láser, LIF, ionización multifotónica acrecentada por resonancia, REMPI, con uno y dos colores y acoplada a un sistema de tiempo de vuelo, REMPI-TOF-MS, y las espectroscopías de doble resonancia IR-UV y UV-UV. Sus espectros y la ayuda de cálculos ab inicio permite determinar las energías de enlace de complejos de van der Waals en estados fundamental y excitados, identificar confórmeros e isómeros, obtener energías de ionización experimentales aproximadas (100 cm-1) y otras variables de interés. Al igual que con LIF, REMPI y dobles resonancias, es posible utilizar muestras gaseosas, pero los espectros están muy saturados de bandas y su interpretación es difícil o imposible. Se evitan estas dificultades estudiando las moléculas o complejos en expansiones supersónicas, donde la T de los grados de libertad solo alcanzan unos pocos K. Para realizar experimentos de ZEKE hay que utilizar una propiedad recientemente descubierta, que va en contra de lo esperado en otros sistemas físicos y que consiste en que los altos estados Rydberg de átomos, moléculas y sus complejos de van der Waals (o de los iones) tienen tiempos de vida de centenas de ? s. En resumen, el experimento y la espectroscopía ZEKE consiste en excitar un átomo, molécula o cluster sucesivamente a dos estados excitados selectivos de manera que el final sea un estado Rydberg. A continuación se aplica un campo eléctrico variable que lo ioniza y después de un cierto retraso se aplica un campo eléctrico de extracción, tanto para el electrón como para el ión. El espectro de los iones, es un espectro ZEKE. Hay varias alternativas para hacer este último proceso. El estudio de la espectroscopía y propiedades de iones y sus clusters requiere el conocimiento detallado de la espectroscopía de la molécula neutra, los estados Rydberg, de los confórmeros y sus complejos. Todo ello implica el haber estudiado los sistemas por LIF, REMPI y doble resonancia (hole burning IR-UV, UV-UV). Además solo es posible interpretar los resultados y obtener la información contenida en los espectros con ayuda de cálculos cuánticos ab initio. Hasta el momento hemos aplicado tanto el ZEKE como el conjunto de técnicas mencionadas anteriormente, a varias molécula de interés químico general como anilina y sus derivados, así como sus complejos con agua y amoniaco. Sin embargo, el método es muy versátil y puede aplicarse a iones de átomos, iones múltiples, moléculas sencillas y sus clusters así como a sus semi-reacciones. Como ejemplo de uno de estos espectros PFI-ZEKE se presenta aquí el caso del amonibenzonitrilo, ABN y solamente en su estado fundamental. En la conferencia se presentarán espectros ZEKE del ABN y moléculas similares en estados vibracionales intermedios (islas de estabilidad), así como la determinación de potenciales de ionización precisos, energías de enlace de compuestos del ión con varios disolventes y otras propiedades de interés, discutiendo sus resultados.

Castaño, F.; Fernández, J. A.; Basterretxea, A. Longarte. F.; Sánchez Rayo, M. N.; Martínez, R.

371

Informe a la Nación encuentra bajas continuas en muchos índices de cáncer;su sección especial destaca cambios en los índices de tumores cerebrales y en supervivencia  

Cancer.gov

Los índices de mortalidad en los Estados Unidos de todos los cánceres en hombres y mujeres siguieron bajando entre 2003 y 2007, que es el período más reciente del que se disponen datos, según el último Informe Anual a la Nación sobre el Estado del Cáncer. El informe encuentra también que el índice general combinado de nuevos diagnósticos de cáncer en hombres y mujeres decreció un promedio un poco menos de 1% por año en el mismo período.

372

Prevalencia de deficiencia subclínica de vitamina A y desnutrición en niños marginales de Maracaibo - Venezuela  

Microsoft Academic Search

RESUMEN. El presente estudio fue realizado para estimar la prevalencia de deficiencia de vitamina A en niños, mediante examen clínico, oftalmológico y por citología de impresión conjuntival (CIC); y el estado nutricional, analizando los indicadores antropométricos T\\/\\/E, P\\/\\/E y P\\/\\/T. La población de estudio incluyó 157 niños, 2-6 años de edad, provenientes de barrios marginales urbanos y rurales de Maracaibo,

Haydée V. Castejón; Pablo Ortega; María E. Díaz; Daisy Amaya; Gisela Gómez; María Ramos; María V. Alvarado; Jesús R. Urrieta

373

CARACTERIZAÇÃO DA PESCA DE LINHA E DINÂMICA DAS FROTAS LINHEIRAS DA BAHIA, BRASIL  

Microsoft Academic Search

RESUMO: A caracterização da pesca de linha e da distribuição batimétrica e sazonal do esforço de pesca das frotas linheiras estabelecidas no estado da Bahia e em operação na costa central, entre Salvador e o norte do Banco de Abrolhos (13-18ºS), foi estudada com base na amostragem de desembarques monitorados pelo Programa REVIZEE em Salvador, Valença, Ilhéus e Porto Seguro

GEORGE OLAVO; PAULO A. S. COSTA; AGNALDO S. MARTINS

374

Resultados comparativos de la reaccion intradermica a la tuberculina - histoplasmina- coccidioidina en Tuberculosos  

Microsoft Academic Search

Resumen  Se estudiaron los resultados comparativos de las reacciones intradérmicas a la Tuberculina, Histoplasmina y Coccidioidina,\\u000a practicadas simultáneamente a 644 enfermos tuberculosos hospitalizados en los Sanatorios „Simón Bolívar“, „Andrés Herrera\\u000a Vegas“, „Luisa Cáceres de Arismendi“ y „Padre Cabrera“, población representativa del aislamiento hospitalario para esta enfermedad\\u000a en el Distrito Federal y Estado Miranda, sin hacer distinción de la clase de tuberculosis

Rafael Fernández Ruiz; Juan Delgado Blanco; Alexis Ilukevich

1961-01-01

375

A domesticação das singularidades. Reflexões sobre o paradigma da prevenção - o caso da epidemia de HIV\\/AIDS The domestication of singularity. Reflections on the HIV\\/AIDS prevention speech paradigm  

Microsoft Academic Search

Resumo Refletindo sobre as estratégias de combate à epidemia de HIV\\/Aids, analisa-se o discurso da prevenção num quadro de subjetivação marcado pela constituição de permanente estado de alerta às situações de risco. Temos observado uma medicalização da vida com a importação para o campo da saúde da idéia de administrar riscos. Configura-se o surgimento de um projeto de vida saudável

Camila Miranda de Amorim

376

Cold-adapted microorganisms as a source of new antimicrobials  

Microsoft Academic Search

Thirty out of 8,000 different colony morphotypes isolated from soil samples of Isla de los Estados were selected based on\\u000a their ability to produce antimicrobials. The significant influence of culture media and incubation temperature on antimicrobial\\u000a production was proved, being LB medium and 8°C the conditions of choice. Most of the psychrotolerant isolates were phylogenetically\\u000a related to Serratia proteamaculans (96.4–97.9%)

Leandro A. Sánchez; Fiorella F. Gómez; Osvaldo D. Delgado

2009-01-01

377

Estudio comparativo de las moléculas isovalentes de interés atmosférico CF3Cl y CF3Br y sus correspondientes halógenos aislados Cl y Br.  

NASA Astrophysics Data System (ADS)

Los estados Rydberg moleculares han suscitado en los últimos años un creciente interés entre los espectroscopistas experimentales, motivado en parte por el desarrollo de nuevas técnicas espectroscópicas capaces de investigar estos estados altamente excitados electrónicamente. Los procesos de fotoabsorción que implican estados Rydberg en los derivados halogenados del metano son de gran importancia, debido a su abundancia en la atmósfera y a sus implicaciones medioambientales. Por ello, la obtención de datos relativos a sus fuerzas de oscilador es de gran interés. En este trabajo se aborda el estudio de dichas propiedades para las moléculas isovalentes CF3Cl y CF3Br. Ambas moléculas presentan idéntica estructura electrónica para el estado fundamental por lo que se espera que sus espectros Rydberg presenten grandes similitudes, en ausencia de perturbaciones. Por ello y dada la escasez de datos relativos a fuerzas de oscilador, hemos establecido la corrección de nuestros resultados en base a las analogías esperadas en las intensidades espectrales correspondientes a transiciones análogas. Por otro lado, Novak y col. [1] han encontrado experimentalmente un marcado carácter atómico en el espectro correspondiente a estas moléculas, siendo muy similar a los de los átomos de Cl y Br. Por ello en el presente trabajo, además de establecer la comparación entre ambas moléculas hemos buscado las similitudes con sus respectivos halógenos. Los cálculos relativos a las especies moleculares se han realizado utilizando la Metodología Molécular de Orbítales de Defecto Cuántico (MQDO) [2], mientras que para el estudio de los átomos de Cl y Br se empleó la versión relativista del método (RQDO) [3].

Mayor, E.; Velasco, A. M.; Martín, I.; Lavín, C.

378

Which Benjamin Franklin—Yours or mine? Examining responses to a new story from the historical archaeology site of Franklin court  

Microsoft Academic Search

\\u000a Resumen  La reciente revisión de las campañas arqueológicas llevadas a cabo en la mansión de Benjamín Franklin en Filadelfia (excavada\\u000a entre 1953 y 1975) revelan una nueva hístoría muy significativa para las comunidades que viven en la actualidad en Estados\\u000a Unidos. La historia de Franklin, inicialmente poseedor de esclavos y posteriormente abolicionista da un giro completo cuando,\\u000a en sentido figurado, los

Patrice L. Jeppson; Benjamin Franklin

2006-01-01

379

Some selected findings of the princeton fertility study: 1963  

Microsoft Academic Search

\\u000a Resumen  Deepués de tres años se hizo una reencuesta de una muestra probabilística de respondientes que al principio vivían en siete\\u000a de las áreas metropolitanas más grandes de los Estados Unidos y que habían tenido el segundo hijo seis meses antis de la primera\\u000a entrevista. Se encontró en la encuesta anterior que la efectividad de la contraconcepcíon fue comparativamente baja entre

Charles F. Westoff; Robert G. Potter; Philip C. Sagi

1964-01-01

380

Premarital pregnancies and out-of-wedlock births in denmark, 1950–65  

Microsoft Academic Search

\\u000a Resumen  A pesar de que una comprensiva investigación de los modelos de espaciamiento de nacimientos requiere tambien la consideración\\u000a de aquellos que son concebidos antes del matrimonio, la información detallada sobre esios nacimientos frecuentemente no existe,\\u000a sobre todo en los Estados Unidos. En cambio, las estadisticas de Dinamarca sobre primeros nacimientos de acuerdo a la duración\\u000a del matrimonio, y de nacimientos

Sidney Goldstein

1967-01-01

381

Análisis del comportamiento estructural de la basílica del Pilar de Zaragoza  

Microsoft Academic Search

En el artículo se presentan los trabajos de desarrollo y validación de un conjunto de modelos estructurales\\u000ade la basílica del Pilar de Zaragoza planteados con el objetivo de aproximar el estado estructural actual del\\u000atemplo y su nivel de seguridad. Los modelos numéricos se han formulado aplicando el MEF en teoría lineal\\u000ay no lineal, incluyendo el proceso constructivo

Luis E. Romera; Santiago Hernández; José Manuel Reinosa

1970-01-01

382

Evaluation of birth statistics derived retrospectively from fertility histories reported in a national population survey: United States, 1945–64  

Microsoft Academic Search

\\u000a Resumen  Este artículo evalua las estimaciones retrospectivas del numero de nacimientos y tasas de natalidad para los Estados Unidos\\u000a derivadas de las historias de fertilidad recogidas en un survey representativo de la poblacion nacional conducido en 1965.\\u000a Más especificamenie, este artículo se centra en la relación entre las variaciones en la calidad de las estadísticas de fertilidad\\u000a derivadas del survey y

Monroe G. Sirken; Georges Sabagh

1968-01-01

383

CONTROLE DA FORMIGA-PRETA-PASTADEIRA, Acromyrmex crassispinus, COM FORMICIDAS EM PÓ CONTROL OF THE BLACK LEAF CUTTING ANT, Acromyrmex crassispinus, WITH POWDERED FORMICIDES  

Microsoft Academic Search

Com o objetivo de buscar alternativas no controle químico da formiga-preta -pastadeira, Acromyrmex crassispinus (Forel, 1909) (Hymenoptera: Formicidae), foram instalados quatro ensaios com formicidas em pó, em Santa Maria, Estado do Rio Grande do Sul, entre 1996 e 1998. Avaliaram-se, em formigueiros grandes (80cm ou mais de diâmetro), doses de Fentiom (50g i.a.\\/kg), de Imidacloprid (4g i.a.\\/kg), de Betaciflutrina (2g

Henrique Moreira Link; Fábio Moreira Link; Dionisio Link

384

Boletín del Instituto Nacional del Cáncer - 07-20-2010  

Cancer.gov

El doctor Harold Varmus, acompañado de su esposa Constance Casey (centro), presta juramento como director del NCI ante la Secretaria del Departamento de Salud y Servicios Humanos, Kathleen Sebelius, el lunes 12 de julio. (Foto cortesía de Chris Smith) El 12 de julio, el doctor Harold Varmus prestó juramento ante la Secretaria del Departamento de Salud y Servicios Humanos de los Estados Unidos, Kathleen Sebelios, como el decimocuarto director del Instituto Nacional del Cáncer.

385

TOXICIDAD DE ACEITES, ESENCIAS Y EXTRACTOS VEGETALES EN LARVAS DE MOSQUITO CULEX QUINQUEFASCIATUS SAY (DIPTERA: CULICIDAE)  

Microsoft Academic Search

Se evaluaron 51 especies de plantas del estado de Oaxaca, México; 39 como extractos acuosos al 5 y 15% y 21 al 25%, y como extractos acetónicos tres especies con cinco dosis (0.1, 0.01, 0.001, 0.0001 y 0.00001%). Además de ocho aceites vegetales a tres dosis (0.1, 0.01 y 0.001%) y 11 esencias vegetales comerciales con cuatro dosis (0.1, 0.01,

Rafael PÉREZ-PACHECO; Cesáreo RODRÍGUEZ HERNÁNDEZ; Joel LARA-REYNA; Roberto MONTES BELMONT; Gustavo RAMÍREZ VALVERDE

386

A quantitative study of the determinants of fertility behavior  

Microsoft Academic Search

\\u000a Resumen  En los últimos años la literatura revela un gran interés en el estudio cuantitativo de los determinantes de la fecundidad.\\u000a Becker presenta bastantes evidencias en un invalorable marco teórico. Mincer provee evidencias e ideas adicionales. Silver\\u000a ha estudiado la respuesta de las tasas de natalidad a los ciclos económicos, para diferentes paises y varios grupos de población\\u000a en Estados Unidos.

Stanley Friedlander; Morris Silver

1967-01-01

387

Neurobiolog?a de la impulsividad y los trastornos de la conducta alimentaria*  

PubMed Central

Resumen Introducción La impulsividad es un rasgo de personalidad multidimensional relacionado con el control del comportamiento y las emociones. Está presente de manera diversa en los trastornos de la conducta alimentaria, particularmente, en la bulimia nerviosa (BN). Aunque la relación entre la impulsividad y BN ha sido objeto de numerosas investigaciones, en la actualidad se desconocen los sustratos neurobiológicos de esta relación. Objetivos Discutir críticamente la evidencia que sugiere que las alteraciones en los sistemas neuronales relacio-nados con las funciones ejecutivas, con la formación de preferencias y con la regulación de los estados emocionales sirven como base para el rasgo de personalidad impulsiva, así como su estado en subgrupos de pacientes con BN. Métodos Búsqueda selectiva de la literatura relevante. Resultados y conclusiones Esta discusión ilustra la complejidad de la relación entre la impulsividad y BN, donde la impulsividad actúa como un factor de vulnerabilidad que puede sensibilizar al sujeto con BN a estados emocionales negativos, durante los cuales modifica el impacto de estímulos internos y externos sobre el comportamiento y su regulación, favoreciendo así patrones de comportamiento maladaptativos e inflexibles.

Orozco-Cabal, Luis Felipe; Herin, David

2009-01-01

388

Zwanzig model of multi-component mixtures of biaxial particles: y3 theory re-visited  

NASA Astrophysics Data System (ADS)

The paper considers the thermodynamic and phase ordering properties of a multi-component Zwanzig mixture of hard rectangular biaxial parallelepipeds. An equation of state (EOS) is derived based on an estimate of the number of arrangements of the particles on a three- dimensional cubic lattice. The methodology is a generalization of the Flory-DiMarzio counting scheme, but, unlike previous work, this treatment is thermodynamically consistent. The results are independent of the order in which particles are placed on the lattice. By taking the limit of zero lattice spacing, a translationally continuous variant of the model (the off-lattice variant) is obtained. The EOS is identical to that obtained previously by a wide variety of different approaches. In the off-lattice limit, it corresponds to a third-level y-expansion and, in the case of a binary mixture of square platelets, it also corresponds to the EOS obtained from fundamental measure theory. On the lattice it is identical to the EOS obtained by retaining only complete stars in the virial expansion. The off-lattice theory is used to study binary mixtures of rods (R1 - R2) and binary mixtures of platelets (P1 - P2). The particles were uniaxial, of length (thickness) L and width D. The aspect ratios ?i = Li/Di of the components were kept constant (?1R = 15, ?1P = 1/15 and ?2R = 150, ?2P = 1/150), so the second virial coefficient of R1 was identical to P1 and similarly for R2 and P2. The volume ratio of particles 1 and 2, v1/v2, was then varied, with the constraints that viR = viP and ILM0001. Results on nematic-isotropic (N - I) phase coexistence at an infinite dilution of component 2, are qualitatively similar for rods and platelets. At small values of the ratio v1/v2, the addition of component 2 (i.e. a thin rod (e.g. a polymer) or a thin plate) results in the stabilization of the nematic phase. For larger values of v1/v2, however, this effect is reversed and the addition of component 2 destabilizes the nematic. For similar molecular volumes of the two components strong fractionation is observed: shorter rods and thicker platelets congregate in the isotropic phase. In general, the stabilization of the ordered phase and the fractionation between the phases are both weaker in the platelet mixtures. The calculated spinodal curves for isotropic-isotropic demixing are noticeably different between the R1 - R2 and the P1 - P2 systems. The platelet mixtures turn out to be stable with respect to de-mixing up to extremely high densities. The values of the consolute points for the R1 - R2 blends are remarkably similar to those obtained using the Parsons-Lee approximation for bi-disperse mixtures of freely rotating cylinders with similar aspect ratios [S. Varga. A. Galindo, G. Jackson, Mol. Phys., 101, 817 (2003)]. In a number of R1 - R2 mixtures, phase diagrams exhibiting both N - I equilibrium and I - I de-mixing were calculated. The latter is pre-empted by nematic ordering in all the cases studied. Calculations show the possible appearance of azeotropes in the N - I coexistence domain.

Sokolova, E. P.; Tumanyan, N. P.; Vlasov, A. Yu.; Masters, A. J.

389

PREFACE: The XI Mexican School on Particles and Fields  

NASA Astrophysics Data System (ADS)

The XI Mexican School on Particles and Fields took place on 2-13 August 2004, in the city of Xalapa, Veracruz, México. The School continued with the tradition of promoting High Energy Physics among the younger generation in Mexico. Thus, it was aimed specifically at graduate students and postdocs. The School consisted of several courses delivered by international experts on subjects of current interest to the scientific community. The length of each course was of six to eight hours, English being the language of instruction. A novelty in this edition of the School was its total duration (two weeks as opposed to one), the number of hours assigned to one subject, and the addition of some experimental courses for the students to overcome their inhibitions of a direct encounter with the equipment and its usage. There were also a few overview talks delivered by local experts on the current status of some of the research fields actively pursued in Mexico. The XI-MSPF was organized by the Particles and Fields Division of the Mexican Physical Society. It was generously sponsored by several institutions: Universidad de Veracruz, Universidad Nacional Autónoma de México, Universidad Michoacana de San Nicolás de Hidalgo, Centro de Investigaciones y Estudios Avanzados del IPN (CINVESTAV) and Consejo Nacional de Ciencia y Tecnología (CONACyT). We are very grateful to Dr Raúl Arias Lovillo, Dr Víctor Manuel Alcaráz Romero, Dr Asdrúbal Flóres López and Mtro Walter Saiz González, head of the Academic Secretariat, Director and Subdirector of the Office of Scientific Research and Director of the Division of Exact Sciences of the University of Veracruz, respectively, for their invaluable support in all senses to our Summer School. We also appreciate the important and useful assistance provided by Dr Rubén Bernardo Morante López, Director of the Museum of Anthropology of Xalapa, and Dr Héctor Coronel Brizio of the Secretariat of Education and Culture of the state of Veracruz. We acknowledge the help of our colleagues in the Organizing Committee: Norma Bagatella Flores (FFIA-U. Veracruzana), Heriberto Castilla Valdés (CINVESTAV-U. Zacatenco), Lorenzo Díz Cruz (FCFM-BUAP), Juan José Godina Nava (CINVESTAV-U. Zacatenco), Gerardo Herrera Corral (CINVESTAV-U. Zacatenco), German Mandujano Vallejo (FFIA-U. Veracruzana), Miguel Ángel Pérez Angón (CINVESTAV-U. Zacatenco), Efraín Rojas Marcial (FFIA-U. Veracruzana) and Carlos Vargas Madrazo (FFIA-U Veracruzana). Many thanks also to our Conference Secretaries Patricia Carranza and Soledad López for the efficiency with which they carried out their job and their dedication. Special thanks go to María Guadalupe Colorado Hernández and Javier Ignacio Fragoso Tizapan, whose help in carrying out the School was essential, without their collaboration this School would not have been the same. We take this opportunity to thank most warmly all the speakers for delivering excellent lectures which made this event a success. Moreover, to our utmost delight, the students participated very enthusiastically and we hope that this school will contribute considerably towards their academic development. The future of scientific endeavour always depends upon the students. Adnan Bashir (IFM-UMSNH) Jens Erler (IF-UNAM) Rául Hernández (FFIA-UV) Myriam Mondragón (IF-UNAM) Luis Villaseñor (IFM-UMSNH)

2005-01-01

390

Changes in sinuosities of the rivers at geological structural lines in the Pannonian Basin - Mosaics to the neotectonic image of the region  

NASA Astrophysics Data System (ADS)

In the central, flat area of the Pannonian Basin, there are just few topographic features for neotectonic investigations. However, a lot of meandering rivers flow here, and it is possible to reconstruct their natural, pre-regulation planforms. Using the map sheets of the Second Military Survey of the Habsburg Empire (mid-19th century; Timár et al., 2006), I digitized the meandering rivers on this area. Sinuosities at different sample section lengths were computed in a GIS environment, providing so-called 'sinuosity-spectra' (van Balen et al., 2008) for each point of the analyzed channels. The channel sinuosity of this river systems are analyzed in order to draw conclusions on the neotectonic activity of the Great Hungarian Plain and the other flat areas of the Pannonian Basin. Several points of sinuosity change were identified. To prove, that these are of neotectonic origin, seismic sections crossing the study area, were also analyzed as well as the geodinamical map of the area (Horváth et al., 2006). High sinuosity variations (low to high or high to low), spatially correlated to linear features identified in seismic survey sections, indicating their neotectonic activity (after Ouchi, 1985). We can see two significante sinuosity changes on the Hron/Garam River (Slovakia), one at Tekov and the one at Kéménd. There are faults on the neotectonic map at these points, crossing the river - they are the possible causes of the increasing of the sinuosity. The vertical activity of these structural lines is verified by the sinuosity changes. At the Maros/Mure? River (Romania/Hungary), a significant sinuosity change can also be identified near to the town of Aiud, where the phenomene is just the opposite like in the Hron/Garam river. There is a fault on the neotectonic map crossing the river. Upstream of the river has higher sinuosity values, and after crossing the fault, it decresed. Here also the fault caused the sinuosity changing, so this fault is also an active one. However, there are more case studies, concerning the rivers of the Pannonian Basin, such as the Tisza River (Timár, 2003), the Körös system (Petrovszki and Timár, 2010), the creeks of the Little Hungarian Plain (Zámolyi et al., 2010) and the downstream part of the Danube (Petrovszki, 2010), providing a broader overview of the river-confirmed neotectonic activity of the region. Horváth, F., Bada, G., Windhoffer, G., Csontos, L., Dombrádi, E., Dövényi, P., Fodor, L., Grenerczy, Gy., Síkhegyi, F., Szafián, P., Székely, B., Timár, G., Tóth, L., Tóth, T. (2006): A Pannon-medence jelenkori geodinamikájának atlasza: Euro-konform térképsorozat és magyarázó. Magyar Geofizika 47(4), 133-137. Ouchi, S. (1985): Response of alluvial rivers to slow active tectonic movement. Geol. Soc. Am. Bull. 96, 504-515. Petrovszki, J. (2010): Sinuosity calculations of the Danube River between Paks (Hungary) and Beograd (Serbia). Geophysical Research Abstracts. Vol. 12, EGU2010-4571 Petrovszki, J., Timár, G. (2010): Channel sinuosity of the Körös River system, Hungary/Romania, as possible indicator of the neotectonic activity. Geomorphology, in press, DOI: 10.1016/j.geomorph.2009.11.009. Timár, G. (2003): Controls on channel sinuosity changes: a case study of the Tisza River, the Great Hungarian Plain. Quaternary Sci. Rev. 22, 2199-2207. Timár, G., Molnár, G., Székely, B., Biszak, S., Varga, J., Jankó, A. (2006): Digitized maps of the Habsburg Empire - The map sheets of the second military survey and their georeferenced version. Arcanum, Budapest, 59 p. van Balen, R. T., Kasse, C., Moor, J. (2008): Impact of groundwater flow on meandering; example from the Geul river, the Netherlands. Earth Surf. Process. and Landf. 33(13), 2010-2028. Zámolyi, A., Székely, B., Draganits, E., Timár, G. (2010): Neotectonic control on river sinuosity at the western margin of the Little Hungarian Plain. Geomorph., in press, DOI: 10.1016/j.geomorph.2009.06.028

Petrovszki, Judit

2010-05-01

391

River sinuosity changes as indicators of the possible neotectonic activity - a case study on the Danube River between Paks (Hungary) and Beograd (Serbia)  

NASA Astrophysics Data System (ADS)

The meandering, pre-regulation river planforms of the Danube River, between Paks (Hungary) and Beograd (Serbia) was digitized from the map sheets of the Second Military Survey of the Habsburg Empire (Timár et al., 2006). These maps were surveyed before or simultaneously with the river control works, so it is possible to follow the natural riverbeds, the natural changing of the meandering structure. The sinuosity values were calculated with different window sizes, and displayed in a spectrum-like diagram (sinuosity spectra; after van Balen et al., 2008). The channel sinuosity of this river is analyzed in order to draw conclusions on the neotectonic activity of the western part of the Great Hungarian Plain. Several points of sinuosity change were identified. To prove that these are of neotectonic origin, a neotectonic map and seismic sections crossing the study area, were also analyzed. Significant sinuosity changes (low to high or high to low), spatially correlated to linear features identified in seismic survey sections or in tectonic maps (Horváth et al., 2006), indicate their neotectonic activity (Ouchi, 1985; Timár, 2003; Zámolyi et al., 2010). Upstream of the Hungarian-Serbian border, the Duna (Danube) has anabranching planform, the Baracskai-Duna is the main anabranch. There is a fault on the neotectonic map, crossing both rivers, and cause the decreasing of the sinuosity. The vertical activity of the structural line, which is more or less parallel to the international border, is verified by the sinuosity change. The direction of the change (from high to low sinuosity values) correlates with the normal fault character, shown on the map. Another significant sinuosity change occurs downstream of the Drava River confluence. The explanation of this change can be of two kinds. First, there is a known tectonic feature along the Drava River, with dextral faulting. The sinuosity increase could indicate a small active vertical component of this structural line. However, another possible explanation is based on the significant sediment load of the tributary, that is naturally decreases the river sinuosity. Horváth, F., Bada, G., Windhoffer, G., Csontos, L., Dombrádi, E., Dövényi, P., Fodor, L., Grenerczy, Gy., Síkhegyi, F., Szafián, P., Székely, B., Timár, G., Tóth, L., Tóth, T. (2006): A Pannon-medence jelenkori geodinamikájának atlasza: Euro-konform térképsorozat és magyarázó. Magyar Geofizika 47(4), 133-137. Ouchi, S. (1985): Response of alluvial rivers to slow active tectonic movement. Geol. Soc. Am. Bull. 96, 504-515. Timár, G. (2003): Controls on channel sinuosity changes: a case study of the Tisza River, the Great Hungarian Plain. Quaternary Sci. Rev. 22, 2199-2207. Timár, G., Molnár, G., Székely, B., Biszak, S., Varga, J., Jankó, A. (2006): Digitized maps of the Habsburg Empire - The map sheets of the second military survey and their georeferenced version. Arcanum, Budapest, 59 p. van Balen, R. T., Kasse, C., Moor, J. (2008): Impact of groundwater flow on meandering; example from the Geul river, the Netherlands. Earth Surf. Process. and Landf. 33(13), 2010-2028. Zámolyi, A., Székely, B., Draganits, E., Timár, G. (2010): Neotectonic control on river sinuosity at the western margin of the Little Hungarian Plain. Geomorph., in press, DOI: 10.1016/j.geomorph.2009.06.028

Petrovszki, Judit

2010-05-01

392

Investigation of watercourses by comparison of successive historical map surveys of Western Hungary  

NASA Astrophysics Data System (ADS)

The Second (Timár et al., 2006) and Third Military Survey (Biszak et al., 2007) of the Habsburg Empire, completed in the 19th century (1806-69 and 1869-87), can be very useful in different scientific investigations because of their accuracy and data content. The mapmakers used geodetic projections and survey technologies provided high accuracy. Therefore, scientists can use these maps and the represented objects in retrospective studies. The streams were drawn with very thin lines that also ascertain the high accuracy of their location. Previous study used the Second Military Survey to examine the neotectonic evaluation of the western part of the Pannonian Basin, bordered by Pinka, Rába and Répce Rivers (Kovács, 2010). The watercourses, especially alluvial ones, react very sensitively to tectonic forcing (Schumm & Khan, 1972; Ouchi, 1985). However, the present-day course of the creeks and rivers are mostly regulated, therefore they are unsuitable for such studies. The watercourses have reconstructed from maps surveyed prior to the main water control measures. The Second Military Survey was a perfect source for such studies. The investigated streams were free meandering ones. They could flood their banks, and only natural levees were present. After georeferencing the maps of the area, the streams were digitized, and their sinuosity values were computed. Where significant sinuosity changes have been detected along the streams, it can be considered as indicators of differential uplift or subsidence of the bedrock/alluvium. The goal of this study is to decide the character of several stream sections: were they free meandering ones or not? Some of the sections are antecedent ones, especially at the Vas Mountain at the present Austrian-Hungarian border. If the shapes of the watercourses on the different surveys are almost the same, the sinuosity refers to a prior, forced state of the stream. After digitizing the watercourses on the Third Military Survey sheets, some newly regulated sections are recognized as well as forced and free meandering ones. Thus, the neotectonic evaluation of the study area can be made more accurate. References - Biszak, S., Timár, G., Molnár, G., Jankó, A. (2007): Digitized maps of the Habsburg Empire - The third military survey, Ungarn, Siebenbürgen, Kroatien-Slawonien, 1867-1887, 1:25000. Arcanum, Budapest, DVD-issue. - Kovács, G. (2010): The advantages of using the Second Military Survey maps in fluvial studies. Acta Geodaetica et Geophysica Hungarica 45(1): 64-70. - Ouchi, S. (1985): Response of alluvial rivers to slow active tectonic movement. Geol. Soc. Am. Bull. 96: 504-515. - Schumm, S. A., Khan, H. R. (1972): Experimental study of channel patterns. Geol. Soc. Am. Bull. 83: 1755-1770. - Timár, G., Molnár, G., Székely, B., Biszak, S., Varga, J., Jankó, A. (2006): Digitized maps of the Habsburg Empire - The map sheets of the second military survey and their georeferenced version. Arcanum, Budapest, 59 p.

Kovács, Gábor

2010-05-01

393

Time-series studies of drainage pattern and morphological features along the Leitha river (Eastern Austria)  

NASA Astrophysics Data System (ADS)

Geomorphologic mapping and drainage network analysis was conducted in the Southern Vienna Basin on the Leitha and Fischa rivers. The study area belongs to an active pull-apart basin between the Eastern Alps and the Carpathians that started to subside in Karpatian times (~ 17 Ma), but with still active faults, proven by fault scarps and earth quakes. The investigated rivers are important tributaries to the Danube river and run through a region that has been subject to settlement since Neoltihic times. Thus, interaction between land use, settlement pattern and river dynamics can be studied. Several datasets are integrated to perform a comprehensive overview of geomorphological, as well as river dynamic changes in the landscape. During an earlier stage of this investigation a map of paleochannel distribution including the location and shape of the paleochannels was extracted from color-infrared and RGB digital orthophotos. Based on this map the location, character and shape of palaeomeanders is studied on different georeferenced historic maps (Timár et al., 2006; Biszak et al., 2007) in order to derive a time-series study. The paleochannels extracted from the digital orthophotos show a good coincidence with the depicted rivers on the historic maps. This partly allows quite well constrained age estimates of the paleochannel sections. The investigated maps are the Walter maps, the First, Second and Third Military Survey of the Habsburg/Austro-Hungarian Empire. Mapping of the Walter maps was conducted 1754-56 (Ulbrich, 1952), the First, Second and Third Military Surveys were mapped in this area in the time-span of 1782-1785, 1819-1869, and 1872-1873, respectively (Kretschmer et al., 2004). This sequence of georeferenced historical maps allows to study only a very short time-span (1755 - 1873) compared to the geological time scale. However, the characteristics of river dynamics special for the study area can be derived and, considering certain assumptions, extrapolated to a wider time range. Within the observable time period the Leitha river preserved its meandering characteristics. Small shifts of the mean channel towards E or W can be detected. A disadvantage of the maps previous to the Third Military Survey is the lack of contour lines. On these maps, variation in terrain elevation was mapped „a la vue" and rather depicted as changes in slope of the terrain by applying hatchures showing a density increase with higher slope. This method provided a very plastic overview of changes in the terrain, but the reading of absolute or relative elevations is not possible. According to this, geomorphologic observations from these maps are constricted to the comparison of the horizontal position of elevated areas and the change of their outline. This study shows that historical maps provide an essential tool to investigate younger river dynamics and sensitively show the impact of anthropological modifications as well as active tectonics. Biszak, S., Timár, G., Molnár, G., Jankó, A. (2007): Digitized maps of the Habsburg Empire - The third military survey, Österreichisch-Ungarische Monarchie, 1869-1887, 1:75000. DVD-issue, Arcanum, Budapest. ISBN 978-963-73-7451-7 Kretschmer, I., Dörflinger, J., Wawrick, F. (2004): Österreichische Kartographie. Wiener Schiften zur Geographie und Kartographie - Band 15. Institut für Geographie und Regionalforschung der Universität Wien, Wien. Timár, G., Molnár, G., Székely, B., Biszak, S., Varga, J., Jankó, A. (2006): Digitized maps of the Habsburg Empire - The map sheets of the second military survey and their georeferenced version. Arcanum, Budapest, 59 p. ISBN 963-7374-33-7 Ulbrich K. (1952): Die Grenzkarte Ungarn-Niederösterreich von C. J. Walter (1754 - 56). Burgenländische Heimatblätter, 14, 108-121

Zámolyi, A.; Draganits, E.; Doneus, M.; Fera, M.; Griebl, M.

2009-04-01

394

Preface  

NASA Astrophysics Data System (ADS)

The biennial International Conferences on Photoacoustic and Photothermal Phenomena (ICPPP) are widely recognized as the major venue for the dissemination of recent and significant research results in the traditional areas, as well as in new and exciting outgrowths of this interdisciplinary field. The ICPPP is concerned with the science, applications and technologies involving the optical, electron-beam or otherwise production, propagation and detection of acoustic, thermal and general diffusion-wave fields.

In the 2004 edition the conference was held in Rio de Janeiro, Brazil, and involved 14 topics covered in the scientific programme. These are Spectroscopy, Analytical Chemistry and Photochemistry, PA and PT Imaging and Microscopy, Thermophysical Properties and Characterization of Materials, Laser Ultrasonics, Ultrafast PA and PT Phenomena, Electronic and Optical Materials, Thin Films and Devices, Non Linear Phenomena and Inverse Problem, Nanoscale Phenomena, Non Destructive Evaluation, Diffusion Waves and Applications, Industrial Applications, New Instruments and Methodology, Biological,Medical and Dental Applications, Agriculture, Food and Environmental Applications . More than 300 short abstracts contributions were received and refereed for acceptation, from 690 authors of 28 different countries.

This volume contains the proceedings of the 13ICPPP including the 207 full papers accepted after a very careful peer review process. Their contents are very deep and modern and show the peculiar interdisciplinary nature of the area. It is provided a collection of papers which includes the traditional subjects of the area as well as new developments of th the fields. The characterization of materials is occupying a great interest in the papers and many studies involving nanoscale phenomena were developed exploring the photothermal methodology. As in the previous conferences thermal wave microscopy and non-linear photothermal phenomena keep a high interest. The application of the methodology to any diffusive wave, other than the thermal one, showed significant growth. In the applications field many expressive papers are analyzing environmental, dental and medical concerns besides those involving other industrial purposes.

The Conference received financial support from various Brazilian institutions and agencies, specially the National Council for Scientific and Technological Development - CNPq and Research and Projects Financing - Brazilian innovation Agency - FINEP, and from United Nations Educational, Scientific and Cultural Organization - UNESCO, to whom the conference organizers are very grateful.

We would like to thank greatly the colleagues that helped much with the refereeing tasks and for the stimulating discussions and suggestions during the conference organization and proceedings preparation. Besides we wish to thank the authors for the high quality of their contributions. In special it should be acknowledge the essential help of the people from State University of the North of Rio de Janeiro (Fluminense)- UENF, State University of Campinas - UNICAMP and National Institute for Space Research - INPE, and colleagues that chaired previous conferences. Finally, we are all grateful evious for the precious work of the conference secretary Nelia F. Leite.

Helion Vargas Chairman of the 13th International Conference on Photoacoustic and Photothermal Phenomena

Vargas, Helion

2005-06-01

395

Assessing the accuracy of the Second Military Survey for the Doren Landslide (Vorarlberg, Austria)  

NASA Astrophysics Data System (ADS)

Reconstruction of the early and long-term evolution of landslide areas is especially important for determining the proportion of anthropogenic influence on the evolution of the region affected by mass movements. The recent geologic and geomorphological setting of the prominent Doren landslide in Vorarlberg (Western Austria) has been studied extensively by various research groups and civil engineering companies. Civil aerial imaging of the area dates back to the 1950's. Modern monitoring techniques include aerial imaging as well as airborne and terrestrial laser scanning (LiDAR) providing us with almost yearly assessment of the changing geomorphology of the area. However, initiation of the landslide occurred most probably earlier than the application of these methods, since there is evidence that the landslide was already active in the 1930's. For studying the initial phase of landslide formation one possibility is to get back on information recorded on historic photographs or historic maps. In this case study we integrated topographic information from the map sheets of the Second Military Survey of the Habsburg Empire that was conducted in Vorarlberg during the years 1816-1821 (Kretschmer et al., 2004) into a comprehensive GIS. The region of interest around the Doren landslide was georeferenced using the method of Timár et al. (2006) refined by Molnár (2009) thus providing a geodetically correct positioning and the possibility of matching the topographic features from the historic map with features recognized in the LiDAR DTM. The landslide of Doren is clearly visible in the historic map. Additionally, prominent geomorphologic features such as morphological scarps, rills and gullies, mass movement lobes and the course of the Weißach rivulet can be matched. Not only the shape and character of these elements can be recognized and matched, but also the positional accuracy is adequate for geomorphological studies. Since the settlement structure is very stable in the region, and in the historical map sheets the individual buildings were also mapped, it is possible to match several buildings with their present-day counterparts. We used matched geomorphologic features and buildings for deriving RMSE values, which range around 26 m. Orientation of major scarps and conspicuous geomorphologic features derived from the historic map and on the LiDAR DTM show a good correlation which confirms the long-term existence of these elements. Evidence from field geologic measurements provide the possible link of these elements to structural geologic features. Furthermore there is strong indication for that the landslide had been in a somewhat other state in the 19th century and the scarp retreat rate could have increased in the second half of the 20th century. Kretschmer, I., Dörflinger, J., Wawrick, F. (2004): Österreichische Kartographie. Wiener Schiften zur Geographie und Kartographie - Band 15. Institut für Geographie und Regionalforschung der Universität Wien, Wien. Molnár, G. (2009): Making a georeferenced mosaic of historical map series using constrained polynomial fit. Geophysical Research Abstracts, 11, ISSN 10297006. Timár, G., Molnár, G., Székely, B., Biszak, S., Varga, J., Jankó, A. (2006): Digitized maps of the Habsburg Empire - The map sheets of the second military survey and their georeferenced version. Arcanum, Budapest, 59 p. ISBN 963-7374-33-7

Zámolyi, András.; Székely, Balázs; Biszak, Sándor

2010-05-01

396

Desiccation tolerance of iron bacteria biofilms on Mars regolith simulants  

NASA Astrophysics Data System (ADS)

Iron oxidizing bacteria play an important role in the geological redox cycling of iron on earth. The redox change between Fe(II) and Fe(III) can be used for biological energy production [1]. Therefore iron oxidation in the iron rich martian soils may be or may have been microbially mediated. The microbial conversion of iron is considered to be an ancient form of metabolism [2], so it might have evolved on Mars as well. However, to exist in recent martian soils, bacteria must be able to endure dry and cold conditions. Neutrophilic iron oxidizers can be found in various iron rich aquatic environments, where they lead to the precipitation of insoluble ferric hydroxides. Some of these environments fall temporarily dry, what could have led to an adaptation to desiccation by bacteria, existing there. One strategy of iron bacteria to endure drought stress might be the formation of biofilms by excreting Extracellular Polymeric Substances (EPS). The deposition of iron hydroxides could enable them to endure dry conditions as well. For our experiments, neutrophilic iron oxidizing bacteria have been isolated from a creek in Bad Salzhausen/Hesse and temporarily drying out pools in Tierra del Fuego. Strains from aquatic environments in the national park "Unteres Odertal" and from water wells in Berlin/Brandenburg are included in the tests as well. In desiccation experiments, the capability of iron bacteria to tolerate dry conditions are investigated. The aim of our first experiment is the adaptation to dry conditions. Biofilms of 15 strains are grown on ceramic beads in liquid medium containing complexed Fe(II), established biofilms contain Fe(III) precipitates. The cultures are desiccated in a sterile airflow until the weight of the cultures remained constant. After a desiccation period of 9 h up to 7 d, the beads are transferred to fresh liquid medium. Adapted strains are used in further desiccation experiments, where biofilms are grown on two martian regolith simulants. These mineral mixtures were developed and produced by the Naturkundemuseum Berlin according to recent data of Mars research missions [3, 4, 5, 6, 7]. The minerals are attached to object slides with potassium silicate and biofilms are grown on the mineral surface. The biofilms are quantified by cell counting and the structure is evaluated by epifluorescence microscopy. After desiccation in a sterile airflow, the survival of cells is determined by fluorescence staining. Acknowledgements This research was supported by the Helmholtz Association through the research alliance "Planetary Evolution and Life". References [1] Weber, K. A. et al. (2006). Microorganisms pumping iron: anaerobic microbial iron oxidation and reduction. Nature Reviews Microbiology 4: 752-764. [2] Vargas, M. et al. (1998). Microbiological evidence for Fe(III) reduction on early Earth. Nature 395: 65-67. [3] Bibring, J.-P., Y. Langevin, et al. (2005). Mars surface diversity as revealed by the OMEGA/Mars express observations. Science 307(5715): 1576-1581. [4] Bibring, J.-P., S. W. Squyres, et al. (2006). Merging Views on Mars. Science 313(5795): 1899-1901. [5] Chevrier, V. and P. E. Mathé (2007). Mineralogy and evolution of the surface of Mars: A review. Planetary and Space Science 55(3): 289-314. [6] McCollom, T. M. and B. M. Hynek (2005). A volcanic environment for bedrock diagenesis at Meridiani Planum on Mars. Nature 438(7071): 1129-1131. [7] Poulet, F., J. P. Bibring, et al. (2005). Phyllosilicates on Mars and implications for early martian climate. Nature 438(7068): 623-627.

Feyh, Nina; Szewzyk, Ulrich

2010-05-01

397

Evolution of the late Paleozoic accretionary complex and overlying forearc-magmatic arc, south central Chile (38°-41°S): Constraints for the tectonic setting along the southwestern margin of Gondwana  

NASA Astrophysics Data System (ADS)

Stratigraphic, structural, metamorphic, and geochronologic studies of basement rocks in the Andean foothills and Coast Ranges of south central Chile (39°-41°S) suggest a protracted late Paleozoic to middle Mesozoic deformational and metamorphic history that imposes important constraints on the tectonic development of the southwestern Gondwana margin. In the study area the late Paleozoic paired metamorphic belt, coeval magmatic arc, and overlying Triassic sedimentary units preserve a record of Late Carboniferous to Early Permian subduction and arc magmatism, subsequent deep exhumation of the Western Series subduction complex, and diminished uplift and erosion of the Eastern Series arc-forearc region by the Late Triassic. Late Paleozoic structural elements and metamorphic assemblages formed during early subduction and arc magmatism, collectively referred to as Dl, are largely erased in the Western Series by the dominant D2 schistosity and lower greenschist grade metamorphism. D1 structural features, as well as original sedimentary textures, are relatively well preserved in the less penetratively deformed Eastern Series. The regional distribution of late Paleozoic arc magmatism suggests that the late Paleozoic convergent margin deviated from a N-S trend north of this area to a NW-SE trend near this latitude and faced an open marine environment to the southwest. A transition from F2 isoclinal folding to more open, larger-scale F3 folds, interpreted as change in ductility during differential uplift of the Western Series, is not apparent in the Eastern Series. Despite a lesser degree of uplift during the main exhumational D2 event, delineation of unconformities and U-Pb dating of detrital zircons and intrusions into the Eastern Series allow tighter constraints to be placed on timing of uplift and denudation of the Eastern Series than on that in the Western Series. A regional unconformity exposed in the Lake District that separates more highly deformed Eastern Series lithologies from Late Triassic shallow marine to continental deposits suggests that substantial uplift also affected the inner forearc and magmatic arc region during the D2 event. We propose that dextral-oblique convergence, initiated during the middle Permian along this segment of the Gondwana margin, resulted in the transpressional uplift and juxtaposition of high pressure/temperature (P/T) Western Series against low P/T Eastern Series lithologies and culminated with deposition of Late Triassic, continental to shallow marine, coarse clastic sedimentary rocks in fault-bounded strike-slip basins adjacent to the exhumed Western Series. Large-scale dextral transpression and northward displacement of the accretionary complex during Late Permian to Late Triassic time along the Chilean margin of Gondwana are synchronous and kinematically compatible with widespread regional transpression, extension, and silicic magmatism inboard of the southern Gondwana margin at this time. We thank C. Mpodozis, M. Gardeweg, and J. Muñoz of the Servicio de Geología y Minería de Chile (SERNAGEOMIN) for their support of this work. Fruitful discussions with N. Blanco, F. Hervé, H. Moreno, C. Mpodozis, and F. Munizaga have aided in our understanding of the geology of the region. The hard work by the staff of SERNAGEOMIN's Puerto Varas office is graciously appreciated. We thank J.D. Walker and W.R. Van Schmus at the University of Kansas for allowing MWM use of their U-Pb and mass spectrometer facilities and J. Vargas and the staff of SERNAGEOMIN's geochemistry laboratory for their assistance in this project. F. Munizaga allowed us to cite an unpublished 40Ar-39Ar date. We thank G. Ya˜nez for access to aeromagnetic data. T. Kato wishes to thank W. G. Ernst. Comments by I. Dalziel, S. Kay, and V. Ramos helped clarify ideas presented in this paper and are greatly appreciated. This work is dedicated to our friend and colleague Alberto Campos C., who died in a climbing accident on Calbuco Volcano, 1996.

Martin, Mark W.; Kato, Terence T.; Rodriguez, Carolina; Godoy, Estanislao; Duhart, Paul; McDonough, Michael; Campos, Alberto

1999-08-01

398

Se evitaron cerca de 800 000 muertes debido al descenso en tabaquismo  

Cancer.gov

Programas y estrategias de control del tabaco del siglo XX fueron responsables de la prevención de más de 795 000 muertes por cáncer de pulmón en Estados Unidos de 1975 al 2000. Si todo el tabaquismo en este país hubiera cesado después de la publicación del primer informe del Director General de Sanidad sobre el tabaquismo y la salud en 1964, un total de 2,5 millones de personas no habrían muerto por cáncer de pulmón en los 36 años que siguieron a ese informe

399

El cáncer de pulmón y los hispanos: esta es la realidad  

Cancer.gov

Primero, las buenas noticias: el número de casos de cáncer de pulmón diagnosticados entre hispanos es cerca de la mitad del número de casos diagnosticados entre blancos no hispanos en Estados Unidos. Y, del 2000 al 2009, el número de casos entre hombres hispanos disminuyó a un ritmo más acelerado que entre hombres blancos no hispanos y se mantuvo estable entre mujeres hispanas. La razón principal de estas buenas noticias es que los hispanos, en general, tienen menos probabilidad de fumar y tienen menos probabilidad de ser fumadores diarios de cigarrillos en comparación con muchos otros segmentos de la población estadounidense.

400

[Interactive multimedia in nursing: a technology for teaching-learning semiology].  

PubMed

This study was aimed at examining the use of interactive multimedia for the theoretical-practical teaching of Semiology in Nursing It was developed at the Nursing School Alfredo Pinto, Universidade Federal do Estado de Rio de Janeiro, Brazil, from August 2004 to June 2005, with fifth semester students. Opinion forms following the structured interview technique were used to collect the data. The results showed that nursing students think interactive multimedia is an instrument that enhances teaching, making possible the interaction of sounds and images. It represents an element directed at audiovisual senses, optimizing their performance during the patient's physical exam and care. PMID:18767364

Gomes, Aline Verônica de Oliveira; Santiago, Luiz Carlos

2008-03-01

401

Fotometría CCD en el campo del cúmulo abierto Ruprecht 58  

NASA Astrophysics Data System (ADS)

La región de Vela-Puppis contiene varios cúmulos cuyo estudio puede brindarnos información acerca de la cinemática y el estado evolutivo de la población estelar en las zonas externas del disco galáctico. A través de observaciones CCD en los filtros UBV en el campo del cúmulo abierto Ruprecht 58 (?2000= 8h 14m 41s, ?2000=-31o 57'), se han determinado por primera vez los parámetros fundamentales de este cúmulo tales como distancia, enrojecimiento y edad. Se analiza también la estructura de su secuencia principal y la presencia de gigantes y binarias.

Giorgi, E. E.; Vázquez, R. A.; Seggewiss, W.; Ostrov, P.; Solivella, G. R.

402

Evolución de planetas gigantes y posibilidades de su detección directa  

NASA Astrophysics Data System (ADS)

Desde la reciente detección de planetas gigantes orbitando estrellas cercanas de tipo solar por medio de efecto Doppler, uno de los principales problemas, en cuanto al estudio de los sistemas planetarios extrasolares, se refiere a la posibilidad de obtener evidencia directa de su existencia. Esto parece ser factible gracias a que en un futuro cercano entrarán en operación algunos telescopios especialmente adecuados a estos propósitos. Por tal motivo, hemos comenzado desde hace un tiempo un esfuerzo en cuanto al estudio de la evolución planetaria. A tales efectos hemos adaptado el código de evolución estelar de nuestro Observatorio al caso planetario. Las principales diferencias entre el caso estelar y el planetario se encuentran en la ecuación de estado. A tales fines hemos incluído la reciente ecuación de estado de Saumon, Chabrier y Van Horn, las opacidades radiativas de Guillot et al., procesos de quema de Deuterio, etc. También se ha considerado la posible existencia de fases de hielo y roca en el interior planetario. Por el momento hemos despreciado los efectos de la rotación planetaria. Con este código hemos computado la evolución de planetas con masas desde 10 hasta 0.3 masas de Júpiter. Utilizando nuestros resultados numéricos discutimos la detectabilidad de estos objetos en condiciones realistas.

Brunini, A.; Benvenuto, O. G.

403

Ensino e divulgação de astronomia no Planetário de Campinas  

NASA Astrophysics Data System (ADS)

Projeto desenvolvido em 1981 por professores da Unicamp, sob a coordenação do Prof. Dr. Carlos Alfredo Argüello propunha a instalação de um Planetário em Campinas. Convênio firmado em 1982 entre a Unicamp, a Prefeitura de Campinas, a Funcamp e a Academia de Ciências do Estado de São Paulo, possibilitou a aquisição de um planetário Zeiss ZKP2, através do MEC, e em 28 de outubro de 1987 foi inaugurado o Planetário de Campinas. Desde então várias atividades de ensino e divulgação da Astronomia foram desenvolvidas regularmente. A verificação dos registros das atividades realizadas mostra um alto índice de atendimento, considerada a capacidade das instalações (sala de projeção para 60 pessoas, auditório com 45 poltronas e hall de exposições). As atividades dirigidas ao público, estudantes e professores, atenderam cerca de 400.000 participantes nos quase 16 anos de sua existência. Além de sessões públicas e escolares, com duração de 1 hora, são oferecidas às escolas vários outros tipos de atividades, com duração de 2,5 horas. Abordam diversos temas e são dirigidas a diferentes níveis de escolaridade. Cursos para o público e para professores, palestras, exposições e eventos especiais completam o quadro de atividades regulares. Mesmo enfrentando quase sempre dificuldades financeiras e administrativas verifica-se que o Planetário de Campinas realizou um trabalho quantitativamente e qualitativamente satisfatório, prestando bom serviços à comunidade de Campinas e de outras cidades de São Paulo e outros Estados. Isso é também atestado pela grande procura de reservas para suas atividades.

Faria, R. P.

2003-08-01

404

Maple procedures for the coupling of angular momenta. IX. Wigner D-functions and rotation matrices  

NASA Astrophysics Data System (ADS)

The Wigner D-functions, Dpqj(?,?,?), are known for their frequent use in quantum mechanics. Defined as the matrix elements of the rotation operator Rˆ(?,?,?) in R and parametrized in terms of the three Euler angles ?, ?, and ?, these functions arise not only in the transformation of tensor components under the rotation of the coordinates, but also as the eigenfunctions of the spherical top. In practice, however, the use of the Wigner D-functions is not always that simple, in particular, if expressions in terms of these and other functions from the theory of angular momentum need to be simplified before some computations can be carried out in detail. To facilitate the manipulation of such Racah expressions, here we present an extension to the RACAH program [S. Fritzsche, Comput. Phys. Comm. 103 (1997) 51] in which the properties and the algebraic rules of the Wigner D-functions and reduced rotation matrices are implemented. Care has been taken to combine the standard knowledge about the rotation matrices with the previously implemented rules for the Clebsch Gordan coefficients, Wigner n-j symbols, and the spherical harmonics. Moreover, the application of the program has been illustrated below by means of three examples. Catalogue identifier:ADFv_9_0 Program summary URL:http://cpc.cs.qub.ac.uk/summaries/ADFv_9_0 Program obtainable from: CPC Program Library, Queen's University of Belfast, N. Ireland Catalogue identifier of previous version: ADFW, ADHW, title RACAH Journal reference of previous version(s): S. Fritzsche, Comput. Phys. Comm. 103 (1997) 51; S. Fritzsche, S. Varga, D. Geschke, B. Fricke, Comput. Phys. Comm. 111 (1998) 167; S. Fritzsche, T. Inghoff, M. Tomaselli, Comput. Phys. Comm. 153 (2003) 424. Does the new version supersede the previous one: Yes, in addition to the spherical harmonics and recoupling coefficients, the program now supports also the occurrence of the Wigner rotation matrices in the algebraic expressions to be evaluated. Licensing provisions:None Computer for which the program is designed and others on which it is operable: All computers with a license for the computer algebra package Maple [Maple is a registered trademark of Waterloo Maple Inc.] Installations:University of Kassel (Germany) Operating systems under which the program has been tested: Linux 8.2+ Program language used:MAPLE, Release 8 and 9 Memory required to execute with typical data:10 50 MB No. of lines in distributed program, including test data, etc.:52?653 No. of bytes in distributed program, including test data, etc.:1?195?346 Distribution format:tar.gzip Nature of the physical problem: The Wigner D-functions and (reduced) rotation matrices occur very frequently in physical applications. They are known not only as the (infinite) representation of the rotation group but also to obey a number of integral and summation rules, including those for their orthogonality and completeness. Instead of the direct computation of these matrices, therefore, one first often wishes to find algebraic simplifications before the computations can be carried out in practice. Reasons for new version: The RACAH program has been found an efficient tool during recent years, in order to evaluate and simplify expressions from Racah's algebra. Apart from the Wigner n-j symbols (j=3,6,9) and spherical harmonics, we now extended the code to allow for Wigner rotation matrices. This extension will support the study of those quantum processes especially where different axis of quantization occurs in course of the theoretical deviations. Summary of revisions: In a revised version of the RACAH program [S. Fritzsche, Comput. Phys. Comm. 103 (1997) 51; S. Fritzsche, T. Inghoff, M. Tomaselli, Comput. Phys. Comm. 153 (2003) 424], we now also support the occurrence of the Wigner D-functions and reduced rotation matrices. By following our previous design, the (algebraic) properties of these rotation matrices as well as a number of summation and integration rules are implemented to facilitate the algebraic simplification of expressions from the the

Pagaran, J.; Fritzsche, S.; Gaigalas, G.

2006-04-01

405

TGS pipeline primed for Argentine growth, CEO says  

SciTech Connect

Nowhere in Latin America has the privatization process been more aggressively pursued than in Argentina where President Carlos Menem has successfully turned over the bulk of state companies to the private sector. In the energy sector, that meant the divestiture in 1992 of Gas del Estado, the state-owned integrated gas transportation and distribution company. It was split in two transportation companies: Transportadora de Gas del Sur (TGS) and Transportadora de Gas del Norte (TGN), and eight distribution companies. TGS is the largest transporter of natural gas in Argentina, delivering more than 60 percent of that nation`s total gas consumption with a capacity of 1.9 Bcf/d. This is the second in a series of Pipeline and Gas Journal special reports that discuss the evolving strategies of the natural gas industry as it continues to restructure amid deregulation. The article focuses on TGS, the Argentine pipeline system in which Enron Corp. is a key participant.

Share, J.

1997-03-01

406

Sexual competitiveness and compatibility between mass-reared sterile flies and wild populations of Anastrepha Ludens (Diptera: Tephritidae) from different regions in Mexico  

SciTech Connect

The mass-reared colony of Anastrepha ludens (Loew) currently used in Mexico for suppression of the Mexican fruit fly has been in use for over 10 years. Sterile flies are released into a wide range of environmental conditions as part of an integrated area-wide approach to suppress diverse populations of this pest in the Mexican Republic. This paper assesses the performance of the sterile flies interacting with wild populations from the different environments. We investigated the sexual compatibility and competitiveness of the sterile flies when competing with wild populations from 6 representatives Mexican states: Nuevo Leon, Tamaulipas, Sinaloa, Nayarit, Michoacan, and Chiapas. Results show that the males of the wild populations differed in the time to the onset and peak of sexual activity. Nevertheless, the index of sexual isolation (ISI) reflected sexual compatibility between the populations and the mass-reared strain, indicating that the sterile individuals mate satisfactorily with the wild populations from the 6 states. The male relative performance index (MRPI) showed that the sterile male is as effective in copulating as the wild males. The female relative performance index (FRPI) reflected a general tendency for wild females to copulate in greater proportion than the sterile females, except for the strains from Tamaulipas and Chiapas. In general, the lower participation of the sterile females in copulation increases the possibilities of sterile males to mate with wild females. The relative sterility index (RSI) showed that the acceptance by wild females of the sterile males (25-55%) was similar to that of wild males. Females of the Chiapas strain showed the lowest acceptance of sterile males. Finally, the results obtained in the Fried test (which measures induced sterility in eggs) showed a competitiveness coefficient ranging from 0.2 to 0.5. This suggests that sterile males successfully compete and are compatible with flies from different geographic origins. (author) [Spanish] La colonia actualmente usada para controlar la mosca mexicana de la fruta, Anastrepha ludens (Loew), en Mexico tiene mas de 10 anos en cria masiva. Los insectos esteriles son liberados en una gran variedad de condiciones ambientales como parte de un control integrado para suprimir diversas poblaciones de esta plaga dentro de la Republica Mexicana. El objetivo de este documento esta dirigido a revisar el desempeno de las moscas esteriles frente a poblaciones silvestres procedentes de diferentes ambientes y para esto se realizaron comparaciones de compatibilidad y competitividad sexual de las moscas esteriles contra poblaciones silvestres de seis estados representativos de la Republica Mexicana: Nuevo Leon, Tamaulipas, Sinaloa, Nayarit, Michoacan y Chiapas. Los resultados obtenidos manifiestan diferencias en el horario de inicio de llamado y mayor actividad sexual del macho entre las moscas provenientes de cada estado. Sin embargo el indice de aislamiento (ISI) reflejo compatibilidad sexual entre la cepa de laboratorio y todas las poblaciones analizadas, indicando que los individuos esteriles pueden aparearse satisfactoriamente con las poblaciones silvestres de los seis estados. El indice de efectividad de apareamiento del macho (MRPI) reflejo de manera global que los machos esteriles son tan efectivos para copular como los silvestres. El indice de efectividad de apareamiento de la hembra (FRPI) reflejo que en la mayoria de los estados las hembras silvestres copularon en mayor proporcion que las hembras esteriles, excepto para las poblaciones de Tamaulipas y Chiapas. En general, la baja participacion de las hembras esteriles en el campo permitio al macho esteril ampliar su probabilidad de apareamiento con las hembras silvestres. En cuanto al indice de esterilidad relativa (RSI), observamos que la aceptacion de las hembras silvestres al macho esteril (25-55%) fue similar a la de los machos silvestres. Las hembras de la poblacion de Chiapas registro la menor aceptacion. Finalmente, los resultados obtenidos en la prueba de Fried, la cual determi

Orozco-Davila, D.; Hernandez, R.; Meza, S.; Dominguez, J. [Programa Moscamed Moscafrut-Desarrollo de Metodos, Central Poniente No. 14 altos-Esq. 2a Avenida Sur. CP 30700 Tapachula, Chiapas (Mexico)

2007-03-15

407

Religiosidade, juventude e sexualidade: entre a autonomia e a rigidez1  

PubMed Central

Esse artigo descreve como jovens religiosos e autoridades religiosas de sua comunidade compreendem a sexualidade, considerando suas experiências pessoais e como membros de comunidades religiosas. A análise pretende contribuir para que políticas públicas dedicadas à promoção da saúde sexual da juventude considerem a religiosidade, no contexto de um estado laico e da promoção do direito à prevenção. Foram realizadas 26 entrevistas abertas e semidirigidas em diferentes comunidades da região metropolitana da cidade de São Paulo (comunidades católicas, da umbanda, do candomblé e de diferentes denominações evangélicas) sobre iniciação sexual, casamento, gravidez, contracepção e prevenção das DST/Aids, homossexualidade, aborto e direitos humanos. Observou-se como jovens e autoridades religiosas convivem com a tensão entre tradição e modernidade e os distintos discursos sobre a sexualidade. Como sujeitos religiosos (do discurso religioso) e sujeitos sexuais (de discursos sobre sexualidade), devem ser incorporados pelos programas como sujeitos de direito nos termos de sua religiosidade.

Silva, Cristiane Goncalves da; Santos, Alessandro Oliveira; Licciardi, Daniele Carli; Paiva, Vera; Parker, Richard

2009-01-01

408

Energy Savers: Tips for Saving Energy and Money at Home; El Ahorro de Energa: Sugerencias para ahorrar energa y dinero en el hogar  

SciTech Connect

The Department of Energy of the United States of America works to guarantee provisions of safe energy, reliable and economically accessible to support to one developing economy and to protect the atmosphere. These suggestions and ideas to increase the energy efficiency in their house represent simple ways in which our citizens can contribute to preserve the atmosphere at world-wide level, to reduce the level of contamination of the air and to reserve our natural resources for future generations. [Spanish] El Departamento de Energa de los Estados Unidos de America trabaja para garantizar suministros de energa seguros, confiables y econmicamente accesibles para apoyar a una economa en desarrollo y proteger el medio ambiente. Estas sugerencias e ideas para aumentar la eficiencia energetica en su casa representan maneras sencillas en que nuestros ciudadanos pueden contribuir a preservar el medio ambiente a nivel mundial, a reducir el nivel de contaminacin del aire y a reservar nuestros recursos naturales para las generaciones futuras.

Jones, J.

2000-06-01

409

La historia orbital de Deimos y la oblicuidad de Marte  

NASA Astrophysics Data System (ADS)

Recientemente, se ha demostrado mediante extensas integraciones numéricas, que la rotación de Marte pasó repetidamente por estados caóticos de movimiento, debido al pasaje por zonas de resonancia spin - órbita. En dichas circunstancias, la oblicuidad marciana pudo haber sufrido grandes excursiones de varias decenas de grados. Las consecuencias de dichas variaciones son de extrema importancia en el contexto de la búsqueda de manifestaciones de vida fósil en dicho planeta. El estudio de la dinámica orbital del satélite más exterior de Marte, Deimos, nos ha permitido comprobar, en el marco de las distintas teorías sobre su orígen, que la oblicuidad de Marte dificilmente pudo haber sufrido variaciones que la aparten más de 10o respecto de actual valor. Este resultado parece ser mucho más robusto que las simulaciones numéricas de Touma y Wisdom asi como las de Laskar y Robutel, lo que permite poner cotas más severas a la evolución paleoclimática de Marte.

Brunini, A.; Yokoyama, T.

410

Establishment of radiation qualities for mammography according to the IEC 61267 and TRS 457.  

PubMed

This article presents the technical conditions necessary to establish appropriate radiation qualities for the calibration of the dosemeters used in the mammography detectors in the Laboratório de Ciências Radiológicas (LCR) from the Universidade do Estado do Rio de Janeiro. Tests were conducted to evaluate the homogeneity of the radiation field, scattering, half-value layers and system stability. The calibration method (substitution) is described in this work. A moderate alteration in filtration makes it possible to maintain the half-value layers within the limits recommended. The results indicate the adequacy of the LCR laboratory for the calibration of the dosemeters in the radiation qualities for mammography with an expanded uncertainty in the best measurement capability of ± 1.8 % (k = 2). PMID:21062803

Pires, Evandro J; David, Mariano G; Peixoto, J Guilherme; Dealmeida, Carlos E

2010-11-09

411

Análise dos Conceitos Astronômicos Apresentados por Professores de Algumas Escolas Estaduais Brasileiras  

NASA Astrophysics Data System (ADS)

A razão para o desenvolvimento deste trabalho baseia-se no fato de que muitos professores da Educação Básica (EB) não lidam com conceitos relacionados à astronomia, e quando o fazem eles simplesmente seguem livros didáticos que podem conter erros conceituais. Como é de conhecimento geral a astronomia é um dos conteúdos a serem ensinados na EB fazendo parte dos Parâmetros Curriculares Nacionais e das Propostas Curriculares do Estado de São Paulo, mas é um fato, que vários pesquisadores apontam, a existência de muitos problemas no ensino da astronomia. Com o propósito de minimizar algumas dessas deficiências foi realizado um trabalho de pesquisa com a utilização de questionários pré e pós pesquisa, para tanto foi desenvolvido um Curso de Extensão Universitária para professores da Diretoria de Ensino Regional (DE) que abrange Mauá, Ribeirão Pires e Rio Grande da Serra (no Estado de São Paulo) com os seguintes objetivos: levantar concepções alternativas; subsidiar os professores por meio de palestras, debates e workshops, e verificar o sucesso da aprendizagem após o curso, adotando-se como referência, para a análise dos resultados, os dicionários de Língua Portuguesa (FERREIRA, 2004) e Enciclopédico de Astronomia e Astronáutica (MOUR?O, 1995). Portanto, dezesseis questões foram aplicadas antes e após o curso, assim pode-se verificar após a pesquisa que 100,0% dos professores sabiam os nomes das fases da Lua, 97,0% entenderam que o Sistema Solar é composto por oito planetas, 78,1% foram capazes de explicar como ocorre um eclipse lunar, um eclipse solar e um solstício, 72,7% sabiam como explicar a ocorrência das estações do ano; 64,5% explicaram corretamente a ocorrência do equinócio, 89,7% foram capazes de definir adequadamente o termo cometa; 63,6% definiram asteróide, 54,5% meteoro, 58,1% galáxia, e 42,4% planeta. Os resultados obtidos indicam uma aprendizagem significativa por parte dos participantes.

Voelzke, Marcos Rincon; Gonzaga, Edson Pereira

2011-12-01

412

Cálculos ab initio con correlación electrónica  

NASA Astrophysics Data System (ADS)

Estamos entrando en una era donde la ortogonalidad entre las investigaciones de carácter experimental y de naturaleza teórica se irá difuminando progresivamente y la problemática a resolver quedará en escena como el único actor principal de la obra. Como premisa para una cooperación teórico-experimental de igual a igual, la metodología químico-cuántica utilizada debe ser capaz de ofrecer resultados de carácter predictivo. Sin duda, esta madurez en la metodología químico-cuántica ya la hemos alcanzado hace algunos años, tal y como muestra entre otras muchas, la labor que nuestro grupo ha realizado en el transcurso de la última década, dentro del campo de la Espectroscopía Teórica. Los estudios realizados comprenden una amplia gama de sistemas, variando tanto en tamaño como en complejidad, abordando problemáticas espectroscópicas consideradas tradicionalmente como especialmente controvertidas. Nuestra contribución científica más relevante reside en el carácter cuantitativo de las asignaciones espectroscópicas que hemos propuesto en base a resultados ab initio. Recordemos que en los años noventa los resultados ab initio solían presentar para las energías de excitación de sistemas de tamaño molecular moderado, como el benceno, errores de más de 1 eV. En comparación con el éxito relativo de los métodos semiempíricos, la frustración de la metodología ab initio quedaba todavía más patente. Los estudios que hemos presentado representan una comprensión profunda de los espectros electrónicos en sistemas orgánicos claves, mostrando el camino a seguir para obtener asignaciones espectroscópicas precisas (entre 0.1-0.2 eV). La naturaleza del método CASPT2 junto al diseño de estrategias computacionales nos ha permitido alcanzar el carácter cuantitativo con el que se caracterizan nuestras contribuciones[1,2]. Por todo ello, algunos de los trabajos publicados se consideran clásicos dentro del campo, pues en cierto modo definen el campo, y se reflejan en libros publicados recientemente. En la conferencia se analizarán ciertos pormenores de las investigaciones realizadas. El tipo de aplicaciones llevadas a cabo hasta la fecha se ilustrará mediante el estudio teórico del espectro electrónico de ciclooctatetraeno. Dando un paso más en la evolución de nuestra investigación, pretendemos en la actualidad describir, desde un formalismo teórico y al mismo nivel de exigencia, los mecanismos subyacentes que tienen lugar en las reacciones biológicas fototoinducidas, es decir, reacciones que se inician mediante la absorción de luz[3]. Como muestra de la caracterización de los procesos fotofísicos y fotoquímicos en fotobiología teórica, hemos elegido la descripción de la conversión interna ultrarrápida que tiene lugar en los cromóforos del ADN. Los estados excitados de las moléculas de los ácidos nucleicos presentan tiempos de vida media que se encuentran en el rango de sub-picosegundos, sugiriendo la presencia de un canal ultrarrápido de conversión interna, lo que normalmente se asocia en la fotoquímica contemporánea a una intersección cónica entre el estado excitado y el fundamental[4]. De esta forma nuestro ADN previene de forma eficaz posibles reacciones en el estado excitado y se revela como un excelente protector solar.

Merchán Bonete, M.

413

Validation of the emission inventory in the Sao Paulo Metropolitan Area of Brazil, based on ambient concentrations ratios of CO, NMOG and NO x and on a photochemical model  

NASA Astrophysics Data System (ADS)

In recent years, photochemical air pollution has become a significant problem in the São Paulo Metropolitan Area (SPMA). For some air pollutants, especially ozone and particulate matter, concentrations in excess of national air quality standards have been registered. According to data published by the State Environmental Agency (CETESB), approximately 90% of ozone precursors are emitted into the atmosphere by the vehicle fleet [CETESB, 2000. Relatório de Qualidade do ar do Estado de Sao Paulo, 1999; CETESB, 2002. Relatório de Qualidade do ar do Estado de Sao Paulo, 2004]. The estimation of precursor emissions speciation is a rather complex task. Estimating spatial and temporal variation of vehicle emissions is the greatest source of uncertainty. As in other locales, data regarding motor vehicle emissions are scarce. Due to the considerable discrepancies in emission inventories reported in various regions of the world, we evaluated the official emission inventories of non-methane organic gas (NMOG) and nitrogen oxides (NO x) using an observation-based approach. Ratios of NO x/carbon monoxide (CO) and NMOG/CO were calculated from ambient measurements taken in the early morning (0700-0800) during July and August of 1999. This top-down approach assumes that early morning ambient concentrations of CO, NO x and NMOG are dominated by motor vehicle emissions, and that the photochemical process has not substantially affected the concentrations. Based on these ratios and on the assumption that official inventory of CO emissions is reasonably accurate, on-road motor vehicle emissions of NO x seem to be significantly overestimated and NMOG emissions slightly underestimated. An Eulerian photochemical model, using both the revised motor vehicle emission inventory and the original official emissions provided by CETESB, was applied to an episodic air pollution event in the SPMA (9-12 August 1999). Meteorology fields were obtained from the CALMET model. When the revised, rather than the official, emission inventories are used, ozone and NO concentrations predicted by the California Institute of Technology (CIT) airshed model more closely match observed values.

Vivanco, Marta G.; Andrade, Maria de Fátima

414

Predicting the ocurrence probability of freak waves baed on buoy data and non-stationary extreme value models  

NASA Astrophysics Data System (ADS)

In the last decades, freak or rogue waves have become an important topic in engineering and science. Forecasting the occurrence probability of freak waves is a challenge for oceanographers, engineers, physicists and statisticians. There are several mechanisms responsible for the formation of freak waves, and different theoretical formulations (primarily based on numerical models with simplifying assumption) have been proposed to predict the occurrence probability of freak wave in a sea state as a function of N (number of individual waves) and kurtosis (k). On the other hand, different attempts to parameterize k as a function of spectral parameters such as the Benjamin-Feir Index (BFI) and the directional spreading (Mori et al., 2011) have been proposed. The objective of this work is twofold: (1) develop a statistical model to describe the uncertainty of maxima individual wave height, Hmax, considering N and k as covariates; (2) obtain a predictive formulation to estimate k as a function of aggregated sea state spectral parameters. For both purposes, we use free surface measurements (more than 300,000 20-minutes sea states) from the Spanish deep water buoy network (Puertos del Estado, Spanish Ministry of Public Works). Non-stationary extreme value models are nowadays widely used to analyze the time-dependent or directional-dependent behavior of extreme values of geophysical variables such as significant wave height (Izaguirre et al., 2010). In this work, a Generalized Extreme Value (GEV) statistical model for the dimensionless maximum wave height (x=Hmax/Hs) in every sea state is used to assess the probability of freak waves. We allow the location, scale and shape parameters of the GEV distribution to vary as a function of k and N. The kurtosis-dependency is parameterized using third-order polynomials and the model is fitted using standard log-likelihood theory, obtaining a very good behavior to predict the occurrence probability of freak waves (x>2). Regarding the second objective of this work, we apply different algorithms using three spectral parameters (wave steepness, directional dispersion, frequential dispersion) as predictors, to estimate the probability density function of the kurtosis for a given sea state. ACKNOWLEDGMENTS The authors thank to Puertos del Estado (Spanish Ministry of Public Works) for providing the free surface measurement database.

Tomas, A.; Menendez, M.; Mendez, F. J.; Coco, G.; Losada, I. J.

2012-04-01

415

Genetic variation in Bactericera cockerelli (Hemiptera: Triozidae) from Mexico.  

PubMed

Bactericera cockerelli (Sulc) is a significant pest of several solanacious crops in Mexico and the United States since 1970. In 2001 significant outbreaks of outstanding importance were observed for the first time in areas where infestations of this insect were historically rare. Molecular studies revealed that this was because of the development of a new biotype of B. cockerelli that had become adapted to south-western United States, further demonstrating that this genetic differentiation was reflected in the survival, development cycle, fertility, and growth rate of both the native biotype as well as the one recently reported. To determine genetic variation in populations of B. cockerelli from Mexico, inter simple sequence repeat were used. Results showed that populations of B. cockerelli from central and northeastern Mexico (Guanajuato, Morelos, Estado de Mexico, and Nuevo Leon states) are genetically similar, meanwhile B. cockerelli from northwest, southwest, and southeast of the country (Sinaloa, Michoacan, and Oaxaca states) are genetically distinct from each other and from the rest of the populations included in the study. PMID:23786093

Lopez, Beatriz; Favela, Susana; Ponce, Gustavo; Foroughbakhch, Rahim; Flores, Adriana E

2013-04-01

416

VIII Olimpíada Brasileira de Astronomia e Astronáutica  

NASA Astrophysics Data System (ADS)

Neste trabalho apresentamos as motivações pelas quais organizamos, em conjunto, pela primeira vez, a Olimpíada Brasileira de Astronomia incluindo a Astronáutica, em colaboração com a Agência Espacial Brasileira. Esta ampliação contribuiu para atrair ainda mais alunos, professores, escolas e patrocinadores para participarem desta Olimpíada. Em 2005 participaram da VIII Olimpíada Brasileira de Astronomia e Astronáutica (VIII OBA) 187.726 alunos distribuídos por 3.229 escolas, pertencentes a todos os estados brasileiros, incluindo o Distrito Federal. O crescimento em número de alunos participantes foi 52,4% maior do que em 2004. Em abril de 2005 organizamos, em Itapecerica da Serra, SP, um curso para os 50 alunos previamente selecionados e participantes da VII OBA e ao final selecionamos, dentre eles, uma equipe de 5 alunos, os quais representaram o Brasil na X Olimpíada Internacional de Astronomia, na China, em outubro de 2005. Ganhamos, pela primeira vez, uma medalha de ouro naquele evento. Em Agosto de 2005, organizamos a VIII Escola de Agosto para 50 alunos e respectivos professores, em Águas de Lindóia, SP, juntamente com a XXXI reunião anual da Sociedade Astronômica Brasileira (SAB). Em novembro de 2005 realizamos a I Jornada Espacial, em São José dos Campos, com 22 alunos e 22 professores selecionados dentre os participantes que melhores resultados obtiveram nas questões de Astronáutica da VIII OBA. Neste trabalho detalhamos os resultados da VIII OBA bem como as ações subseqüentes.

Garcia Canalle, João Batista; Villas da Rocha, Jaime Fernando; Wuensche de Souza, Carlos Alexandre; Pereira Ortiz, Roberto; Aguilera, Nuricel Villalonga; Padilha, Maria De Fátima Catta Preta; Pessoa Filho, José Bezerra; Soares Rodrigues, Ivette Maria

2007-07-01

417

Estudio multiespectral del remanente de supernova W 28  

NASA Astrophysics Data System (ADS)

Se presentan observaciones en continuo de radio con muy alta resolución angular y sensibilidad del remanente de supernova (RSN) W28. Las observaciones fueron realizadas con el interferómetro Very Large Array (Estados Unidos), en las configuraciones C y D, en 1415 y 324 MHz. Por la gran extensión de este remanente (diámetro ~ 1o), las observaciones en 1415 MHz se realizaron en modo mosaico, combinando 48 apuntamientos diferentes en una única imagen. En ambas frecuencias los datos se procesaron con el agregado de observaciones de menor resolución angular, a fin de recuperar información en todas las frecuencias espaciales y obtener estimaciones precisas de densidad de flujo. Las imágenes resultantes muestran por primera vez la presencia de extensiones con forma de arco, cuya naturaleza se investiga. Las observaciones en radio se comparan con una imagen óptica de W28, y con la emisión en rayos X, observada con el satélite ROSAT. Este remanente muestra una clara morfología híbrida, tipo cáscara en frecuencias de radio y de centro lleno en las bandas óptica y de rayos X blandos.

Dubner, G.; Velázquez, P.; Castelletti, G.

418

[Barriers and Facilitators in the Recruitment and Retention of Heterosexual Couples for Preventive Interventions.  

PubMed

El Reclutamiento y la Retención (R&R) de participantes es fundamental para el éxito de estudios y para el desarrollo de intervenciones preventivas. El R&R de participantes determina la validez y efectividad de estos programas. En este trabajo examinamos algunos de los factores que facilitan y dificultan el R&R en los proyectos preventivos y ofrecemos algunas alternativas para mejorar los índices de R&R. Realizamos dos estudios, en el primero administramos el Instrumento de Informatión, Motivatión y Conductas-Español (IIMC-E) a un grupo de 26 parejas heterosexuales (52 participantes). En el segundo, entrevistamos a 5 parejas VIH discordantes (10 participantes). Encontramos que el 75% de los/las participantes indicó que su trabajo era una de las principales barreras que dificultan la asistencia a las actividades. Otras barreras son las responsabilidades laborales y familiares. Encontramos que la principal barrera fue el miedo a la revelación del estado serlógico. Los principales facilitadores del R&R son la coordinación adecuada y el seguimiento telefónico ofrecido por parte del personal del proyecto. Concluimos que en el desarrollo e implantación de programas de prevención el investigador/a debe tomar en cuenta la adaptación de aspectos logísticos como la disponibilidad y las necesidades particulares de los/las participantes. PMID:23264700

Hernández-Hernández, Alberto L; Perez-Jimenez, David

2010-01-01

419

Vínculos sobre um modelo de quartessência de Chaplygin usando observações do satélite chandra da fração de massa de gás em aglomerados de galáxias  

NASA Astrophysics Data System (ADS)

Observações de Supernovas do tipo Ia mostram que a expansão do Universo está acelerando. Segundo as equações de Einstein uma componente com pressão negativa (energia escura) é necessária para explicar a aceleração cósmica. Além da energia escura é usualmente admitido que no Universo há também uma matéria exótica com pressão zero, que é chamada de matéria escura. Essa componente possui um papel fundamental na formação de estruturas no Universo. Recentemente tem se explorado a possibilidade de que matéria e energia escura poderiam ser unificadas através de uma única componente, que tem sido denominada de quartessência. Um exemplo de fluido com essas características é o Gás de Chaplygin Generalizado, que possui uma equação de estado da forma p = -A/ra. Inicialmente consideramos o caso especial a = 1 (gás de Chaplygin) e vinculamos parâmetros do modelo utilizando observações em raios-X do satélite Chandra da fração de massa de gás em aglomerados de galáxias. Uma comparação dos vínculos obtidos com esse teste com outros testes, tais como supernovas e idade do Universo, mostra que esse teste é bastante restritivo. Exibiremos ainda resultados para o caso em que a curvatura é nula e o parâmetro a está compreendido no intervalo -1 < a 1.

de Souza, R. S.

2003-08-01

420

Improvement of a popcorn population using selection indexes from a fourth cycle of recurrent selection program carried out in two different environments.  

PubMed

We estimated genetic gains for popcorn varieties using selection indexes in a fourth cycle of intrapopulation recurrent selection developed in the campus of the Universidade Estadual do Norte Fluminense. Two hundred full-sib families were obtained from the popcorn population UNB-2U of the third recurrent selection cycle. The progenies were evaluated in a randomized block design with two replications at sites in two different environments: the Colégio Estadual Agrícola Antônio Sarlo, in Campos dos Goytacazes, and the Empresa de Pesquisa Agropecuária do Estado do Rio de Janeiro (PESAGRO-RIO), in Itaocara, both in the State of Rio de Janeiro. There were significant differences between families within sets in all traits, indicating genetic variability that could be exploited in future cycles. Thirty full-sib families were selected to continue the program. The selection indexes used to predict the gains were those of Mulamba and Mock, Smith and Hazel. The best results were obtained with the Mulamba and Mock index, which allowed the prediction of negative gains for the traits number of diseased ears and ears attacked by pests, number of broken plants and lodging, as well as ears with poor husk cover. It also provided higher gains for popping expansion and grain yield than with the other indexes, giving values of 10.55 and 8.50%, respectively, based on tentatively assigned random weights. PMID:20309820

Amaral Júnior, A T; Freitas Júnior, S P; Rangel, R M; Pena, G F; Ribeiro, R M; Morais, R C; Schuelter, A R

2010-03-02

421

[Treatment of osteosarcoma in children with pre- and postoperative chemotherapy and block resection of the tumor].  

PubMed

The authors describe the results of five pediatric patients with nonmetastatic osteosarcoma of an extremity, admitted from 1987 to 1989 to the Hospital Infantil del Estado de Sonora. Four patients presented with their primary tumor located at the distal end of the femur, whereas one had a primary lesion of the humerus. All of them received preoperative chemotherapy consisted of two cycles of cisplatin and adriamycin. One of the patients presented immediate complications after first cicle and died due to overwhelming sepsis by Candida albicans. Surgery was an amputation in one patients and block ressection in three cases. Necrosis was good in three cases, fair in one. Postoperative chemotherapy consisted of bleomycin, cyclophosphamide and dactinomycin every four weeks alternated with cisplatin plus adriamycin. One of the three patients, in which block ressection was made, had a local recurrence 12 months after diagnosis, without metastasis. He underwent desarticulation and died four months later of leukoencephalopathy and no tumor was found on necropsy. Three patients have remained continuously free of disease with follow up of 20, 26 and 31 months after diagnosis and are out of chemotherapy since 5, 12 and 17 months, respectively. In two of them the affected extremity still is safe. PMID:2064745

Covarrubias-Espinoza, G; Goiricelaya-Asia, J M; Vásquez-Bojórquez, R; López-Cervantes, G

1991-03-01

422

A participatory approach to integrated aquifer management: The case of Guanajuato State, Mexico  

NASA Astrophysics Data System (ADS)

Guanajuato State, located in central Mexico, with less than 2% of the country's area, has almost 17,000 deep water wells, from which nearly 4,000 cubic hectometers (hm3) per year are being extracted, more than 1,000 hm3 over the estimated renewable yield. Since, in Mexico, water is administered under federal jurisdiction by the National Water Commission (CNA, for its Spanish acronym), the state government faces the challenge of ensuring its population's economic development without formal means of intervention. Being thus limited to apply mandatory policies and measures, the state water program has focused on the implementation of a two-sided strategy. First, basic hydrogeological studies and mathematical groundwater hydrodynamic models were developed upon a comprehensive survey of existing wells and a general revision of the state's geological framework. Second, a structure for water user's participation in water management actions was promoted (from the dissemination of information to the implementation of pilot efficient water use projects) with financial, technical and political support from the state. Simultaneously, a coordinated effort towards the completion of the water user's registry was performed with the federal authority along with other supporting measures such as training and monitoring programs. In this paper, a general overview of the project's achievements and challenges is presented. L'État de Guanajuato, situé dans la partie centrale du Mexique, avec moins de 2% de la surface du pays, a près de 17 000 puits profonds, d'où sont extraits près de 4 000 hm3 par an, soit plus de 1 000 hm3 de plus que le débit renouvelable estimé. Comme au Mexique l'eau est administrée dans le cadre d'une juridiction fédérale, le gouvernement de l'État fait tout son possible pour assurer le développement de sa population sans moyens formels d'intervention. Étant ainsi limité à appliquer des politiques et des mesures de recommandations, le programme Eau de l'État s'est appliqué à développer une stratégie sur deux plans. Tout d'abord, des études hydrogéologiques de base et des modèles mathématiques d'écoulement et de transport de nappe ont été réalisés à partir d'un suivi d'ensemble des puits existants et d'une révision générale du contexte géologique de l'État. Ensuite, on a soutenu une structure de participation des usagers de l'eau aux actions de gestion de l'eau, à partir de la dissémination de l'information pour la mise en place de projets pilotes efficaces d'utilisation de l'eau, avec des aides financières, techniques et politiques de l'État. Simultanément, un effort coordonné en vue de l'achèvement de l'enregistrement des usagers de l'eau a été fait avec l'autorité fédérale, en même temps que d'autres mesures de soutien, telles que des programmes de formation et des campagnes de surveillance. Cet article présente une vue d'ensemble des réalisations de projets et des défis. Resumen El Estado de Guanajuato, situado en el centro de México, ocupa menos del 2% de la superficie del país. Tiene casi 17.000 pozos profundos, de los cuales se extrae cerca de 4.000 hm3/a, lo que supone un exceso de 1.000 hm3/a respecto a la recarga anual. Puesto que el agua es administrada a nivel federal en México, el gobierno del Estado afronta el reto de asegurar el desarrollo de la población sin disponer de medios formales de intervención. Dadas las limitaciones para aplicar políticas y medidas reguladoras, el programa del agua en el Estado tiene como objetivo principal la implantación de una doble estrategia. Por un lado, desarrollar estudios hidrogeológicos básicos y modelos matemáticos de flujo y transporte de los acuíferos, basándose en una campaña exhaustiva de pozos existentes y en una revisión del marco geológico del Estado. Por otro lado, promover-con soporte financiero, técnico y político-una estructura de participación de los usuarios en las acciones de gestión, incluyendo desde la difusión de la información hasta la implantación de proyectos piloto para un uso

Sandoval, Ricardo

423

Screening for marijuana and cocaine abuse by immunoanalysis and gas chromatography.  

PubMed

Drug abuse among college students is characterized by lower academic performance and long-term negative consequences. Screening to detect students at high risk of consuming drugs is of primary importance to insure early identification and appropriate levels of care. As a result, this study aimed to determine the current or past use of drug abuse through a questionnaire applied to a student population at the Universidad Autónoma del Estado de Morelos. The results were confirmed by immunoanalysis and gas chromatography of urine. We interviewed 181 students aged 15 to 21 (gender was not considered in this study), and urine samples were collected for analytical analysis. For detection of metabolites Delta9-THCA-A and benzoylecgonine from marijuana and cocaine, respectively, a homogenous enzymatic inmmunoanalysis was used; subsequent samples were analyzed by a mass spectrometer with quadrupole detector. Seven samples of the total (181) did not completely fit the inclusion criteria and were eliminated. The results showed 0.50% and 1.16% positive samples for benzoylecgonine and Delta9-THCA-A, respectively. These results are not different from those of the National Questionnaire on Addiction. We can establish a program for detecting drug consumption in our students. This kind of study is important in order to implement programs that can help us to decrease the abuse of drugs in our college population. PMID:18991889

Garcia-Jimenez, Sara; Heredia-Lezama, Karina; Bilbao-Marcos, Fernando; Fuentes-Lara, Griselda; Monroy-Noyola, Antonio; Deciga-Campos, Myrna

2008-10-01

424

The use of polliniferous resources by Melipona capixaba, an endangered stingless bee species.  

PubMed

Abstract Pollen types present in samples from corbiculae of Melipona capixaba (Moure and Camargo) (Hymenoptera: Apidae: Meliponina) worker bees were analyzed, as well as pollen samples from food pots inside the hives in three sites located at the bees' original habitat. The aim was to find out the sources used as a trophic resource by this species. The dominant pollen grains in the spectrum of the samples belonged to the families Myrtaceae and Melastomataceae. Eucalyptus was the most frequent pollen type in the corbiculae in Conceição do Castelo municipality; Eucalyptus, Myrcia, and Melastomatacea/Combretaceae in the Fazenda do Estado district; and Eucalyptus and Myrcia in the São Paulo de Aracê district, both in the Domingos Martins municipality. Eucalyptus and Melastomataceae/Combretaceae were the predominant pollen types in the food pots. Eucalyptus was the most prevalent type all year round or most of the year. The most common pollen types in the months that Eucalyptus was not present or dominant in the samples were of remaining native forest species, "ruderal" (field) plants, fruit-bearing plants, and introduced ornamental plants. PMID:23464528

Serra, Bruna Danielle Vieira; da Luz, Cynthia Fernandes Pinto; Campos, Lucio Antonio de Oliveira

2012-01-01

425

Simulações Numéricas de Rotação Nuclear Cometária  

NASA Astrophysics Data System (ADS)

Este trabalho apresenta os resultados iniciais de simulações numéricas da evolução rotacional, de um núcleo cometário não esférico, ao longo de uma passagem periélica, levando-se em conta os torques devido a existência dos jatos de poeira e de gás. Inicialmente os autores apresentam um modelo simples (primeira aproximação), com somente um único jato na extremidade do semi-eixo maior, para compreender a variação positiva ou negativa que estas forças não gravitacionais exercem sobre o período de rotação cometário. Posteriormente incrementa-se o número de jatos, os quais são distribuídos ao longo da superfície cometária, para observar-se a contribuição dos efeitos provenientes dos torques originários da liberação da poeira e gás cometários, que provavelmente violará a suposição da livre precessão. Os estados rotacionais, sob torques induzidos devido à sublimação, dependem fortemente da localização das áreas ativas do núcleo. Os cometas P/Schwassmann-Wachmann 1, P/Tempel 2, P/Forbes e C/Meunier-Dupouy serão observados fotometricamente, pelos autores, no Laboratório Nacional de Astrofísica (LNA) ao longo de algumas noites consecutivas em abril, junho e julho de 1999. Estas observações serão comparadas com as simulações numéricas de rotação cometária.

Voelzke, M. R.; Winter, O. C.

1999-08-01

426

[The arrival of the plague in São Paulo in 1899].  

PubMed

In October 1899, the bubonic plague arrived in Brazil through the port of Santos. A city of intensive port activity, Santos was the gateway for a plague epidemic that devastated several cities in Brazil in the early 20th century and prompted joint action by several states to fight it. More importantly, given the difficulties and delays in importing anti-plague serum from Europe, it led to the creation of the Butantan Institute in Sao Paulo (in 1899) and the Municipal Serotherapeutic Institute in Rio de Janeiro (in 1900), which developed and standardized anti-plague serum and vaccines according to the particular conditions of the country. Until then, public health efforts had been isolated and had not reached the whole country. Oswaldo Cruz, newly arrived after three years of specialization at the Pasteur Institute in Paris, worked with scientists Adolfo Lutz and Vital Brazil on identifying the plague in Santos. This article analyzes the arrival of the bubonic plague epidemic in the state of Sao Paulo and the public health measures taken to combat the disease and provide patient care in the early part of the 20th century. The primary sources for this analysis were the São Paulo newspapers, especially O Estado de Sao Paulo, and reports from the Ministry of Justice and the President of the State of Sao Paulo. PMID:21936225

do Nascimento, Dilene Raimundo

2011-01-01

427

Science and technology disclosure in the state of Queretaro: Science and Technology for Children program  

NASA Astrophysics Data System (ADS)

Science and technology disclosure is an integral part of our scientific work as researches; it is an induction process for children, young people and teachers of primary and secondary schools in the state of Queretaro. Education must be offered in a clear and objective way, it allows to the students apply the acquired knowledge to understand the world and improve his quality of life. Nowadays, the Centro de Investigacion en Ciencia Aplicada y Tecnologia Avanzada of the Instituto Politecnico Nacional Unidad Queretaro (CICATA-IPN Queretaro) together with the Consejo de Ciencia y Tecnologia del Estado de Queretaro (CONCYTEQ) have implemented the "Science and Technology for Children" program (Ciencia y Tecnologia para Ninos - CTN), it allows to the educative sector obtain information through the CONCYTEQ web page. The fist stage of the program was the development of two subjects: the brochure titled "Petroleum, Nonrenewable Natural Resource that Moves the World" and the manual "Experiments of Physics". At the moment we are working with the second stage of the program, it is about the energy generation using renewable sources such as: geothermal, aeolian, solar and biomass. The CTN program allows to students and teachers to create conscience about the importance of the development of the science of technology in our country.

Contreras Flores, Rubén; Villeda Muñoz, Gabriel

2007-06-01

428

The Use of Polliniferous Resources by Melipona capixaba, an Endangered Stingless Bee Species  

PubMed Central

Pollen types present in samples from corbiculae of Melipona capixaba (Moure and Camargo) (Hymenoptera: Apidae: Meliponina) worker bees were analyzed, as well as pollen samples from food pots inside the hives in three sites located at the bees’ original habitat. The aim was to find out the sources used as a trophic resource by this species. The dominant pollen grains in the spectrum of the samples belonged to the families Myrtaceae and Melastomataceae. Eucalyptus was the most frequent pollen type in the corbiculae in Conceição do Castelo municipality; Eucalyptus, Myrcia, and Melastomatacea/Combretaceae in the Fazenda do Estado district; and Eucalyptus and Myrcia in the São Paulo de Aracê district, both in the Domingos Martins municipality. Eucalyptus and Melastomataceae/Combretaceae were the predominant pollen types in the food pots. Eucalyptus was the most prevalent type all year round or most of the year. The most common pollen types in the months that Eucalyptus was not present or dominant in the samples were of remaining native forest species, “ruderal” (field) plants, fruit-bearing plants, and introduced ornamental plants.

Serra, Bruna Danielle Vieira; da Luz, Cynthia Fernandes Pinto; Campos, Lucio Antonio de Oliveira

2012-01-01

429

Diversity of mtDNA in Southern River Otter (Lontra provocax) from Argentinean Patagonia.  

PubMed

Lontra provocax is an endemic species from Patagonia that has been categorized as "endangered" by the International Union for Conservation of Nature. In this study, noninvasive molecular methods were used to investigate the genetic diversity and haplotype distribution of L. provocax in Argentinean Patagonia. We analyzed 150 scat samples collected from 1995 to 2006 and obtained 13 sequences of control region with 1 haplotype and 34 sequences of cytochrome b with 4 haplotypes. The population of the south of Patagonia (Tierra del Fuego and De los Estados Island) showed a relatively high haplotype diversity (h = 0.71) and was statistically different to the population of the north (analysis of molecular variance, F(ST) = 0.15, P = 0.018). We concluded that there are 2 different subpopulations of L. provocax that deserve conservation attention and that the southern population appears not to have suffered a human-induced population bottleneck of the sort typically experienced by various otter species around the world. PMID:18310615

Centrón, Daniela; Ramirez, Benjamín; Fasola, Laura; Macdonald, David W; Chehébar, Claudio; Schiavini, Adrián; Cassini, Marcelo H

2008-02-29

430

Esquizofrenia y trastorno en el consumo de sustancias: prevalencia y character?sticas sociodemogr?ficas en la poblaci?n Latina  

PubMed Central

El interés por comprender la co-morbilidad de la esquizofrenia y el trastorno en el uso de sustancias, ha aumentado debido al incremento de este diagnóstico, a los efectos negativos observados en el sujeto y a los costos en los servicios de salud. Este trastorno dual puede tener efectos dramáticos en el curso clínico del trastorno psicótico tales como: mayores recaídas, re-hospitalizaciones, síntomas más severos, no adherencia al tratamiento antipsicótico, cambios marcados del humor, aumento en el grado de hostilidad e ideación suicida, así como alteraciones en otras áreas del funcionamiento incluyendo violencia, victimización, indigencia y problemas legales. La literatura proveniente en particular de Estados Unidos y Europa sugiere que el rango de prevalencia para este diagnóstico puede oscilar entre el 10% hasta el 70%. En este estudio, revisamos la prevalencia del diagnóstico dual de esquizofrenia y trastorno en el uso sustancias, así como sus características sociodemográficas, con base en la literatura disponible alrededor del mundo dando énfasis en la poblacion latina. A pesar de que este diagnóstico es ampliamente aceptado, se conoce poco sobre su prevalencia en la población latina, sobre los factores ambientales, demográficos, clínicos y otras características de estos individuos. Un mejor conocimiento sobre este diagnóstico permitiría mejorar los métodos para la detección y adecuada valoración del trastorno en el uso de sustancias en personas con trastornos metales severos como la esquizofrenia.

Jimenez-Castro, Lorena; Raventos-Vorst, Henriette; Escamilla, Michael

2012-01-01

431

Inverse problem in hydrogeology  

NASA Astrophysics Data System (ADS)

The state of the groundwater inverse problem is synthesized. Emphasis is placed on aquifer characterization, where modelers have to deal with conceptual model uncertainty (notably spatial and temporal variability), scale dependence, many types of unknown parameters (transmissivity, recharge, boundary conditions, etc.), nonlinearity, and often low sensitivity of state variables (typically heads and concentrations) to aquifer properties. Because of these difficulties, calibration cannot be separated from the modeling process, as it is sometimes done in other fields. Instead, it should be viewed as one step in the process of understanding aquifer behavior. In fact, it is shown that actual parameter estimation methods do not differ from each other in the essence, though they may differ in the computational details. It is argued that there is ample room for improvement in groundwater inversion: development of user-friendly codes, accommodation of variability through geostatistics, incorporation of geological information and different types of data (temperature, occurrence and concentration of isotopes, age, etc.), proper accounting of uncertainty, etc. Despite this, even with existing codes, automatic calibration facilitates enormously the task of modeling. Therefore, it is contended that its use should become standard practice. L'état du problème inverse des eaux souterraines est synthétisé. L'accent est placé sur la caractérisation de l'aquifère, où les modélisateurs doivent jouer avec l'incertitude des modèles conceptuels (notamment la variabilité spatiale et temporelle), les facteurs d'échelle, plusieurs inconnues sur différents paramètres (transmissivité, recharge, conditions aux limites, etc.), la non linéarité, et souvent la sensibilité de plusieurs variables d'état (charges hydrauliques, concentrations) des propriétés de l'aquifère. A cause de ces difficultés, le calibrage ne peut êtreséparé du processus de modélisation, comme c'est le cas dans d'autres cas de figure. Par ailleurs, il peut être vu comme une des étapes dans le processus de détermination du comportement de l'aquifère. Il est montré que les méthodes d'évaluation des paramètres actuels ne diffèrent pas si ce n'est dans les détails des calculs informatiques. Il est montré qu'il existe une large panoplie de techniques d'inversion : codes de calcul utilisables par tout-un-chacun, accommodation de la variabilité via la géostatistique, incorporation d'informations géologiques et de différents types de données (température, occurrence, concentration en isotopes, âge, etc.), détermination de l'incertitude. Vu ces développements, la calibration automatique facilite énormément la modélisation. Par ailleurs, il est souhaitable que son utilisation devienne une pratique standardisée. Se sintetiza el estado del problema inverso en aguas subterráneas. El énfasis se ubica en la caracterización de acuíferos, donde los modeladores tienen que enfrentar la incertidumbre del modelo conceptual (principalmente variabilidad temporal y espacial), dependencia de escala, muchos tipos de parámetros desconocidos (transmisividad, recarga, condiciones limitantes, etc), no linealidad, y frecuentemente baja sensibilidad de variables de estado (típicamente presiones y concentraciones) a las propiedades del acuífero. Debido a estas dificultades, no puede separarse la calibración de los procesos de modelado, como frecuentemente se hace en otros campos. En su lugar, debe de visualizarse como un paso en el proceso de enten dimiento del comportamiento del acuífero. En realidad, se muestra que los métodos reales de estimación de parámetros no difieren uno del otro en lo esencial, aunque sí pueden diferir en los detalles computacionales. Se discute que existe amplio espacio para la mejora del problema inverso en aguas subterráneas: desarrollo de códigos amigables alusuario, acomodamiento de variabilidad a través de geoestadística, incorporación de información geológica y diferentes tipos de datos (temperatura, presencia y co

Carrera, Jesús; Alcolea, Andrés; Medina, Agustín; Hidalgo, Juan; Slooten, Luit J.

2005-03-01

432

Moléculas orgánicas obtenidas en simulaciones experimentales del medio interestelar.  

NASA Astrophysics Data System (ADS)

Las nubes moleculares son regiones de formación de estrellas, con temperaturas cinéticas entre 10-50 K y densidades de 103-106 átomos cm-3. Su materia está formada por gas y polvo interestelar. Estas partículas de polvo están cubiertas por una fina capa de hielo, de unos 0.01 ?m, que contiene H2O y a menudo CO, CO2, CH3OH y NH3. El hielo es presumiblemente irradiado por fotones ultravioleta y rayos cósmicos en las zonas poco profundas de las nubes moleculares y las regiones circunestelares. En un sistema de vacío, P ˜ 10-7 mbar, simulamos la deposición de hielo a partir de 10 K y la irradiación ultravioleta por medio de una lámpara de descarga de hidrógeno activada con microondas. La evolución del hielo se observa por medio de un espectrómetro infrarrojo. De este modo es posible determinar la composición del hielo observado en el medio interestelar y predecir la presencia de moléculas aún no detectadas en el espacio, que han sido producto del procesamiento del hielo en nuestros experimentos. También es posible calentar el sistema hasta temperatura ambiente para sublimar el hielo depositado. Cuando el hielo ha sido previamente irradiado, se observa un residuo compuesto por moléculas orgánicas complejas, algunas prebióticas, como varios ácidos carboxílicos, aminas, amidas, ésteres y en menor proporción moléculas heterocíclicas y aminoácidos. Algunas de estas moléculas podrían detectarse en estado gaseoso por medio de observaciones milimétricas y de radio. También podrían estar presentes en el polvo cometario, cuyo análisis químico está planeado por las misiones Stardust y Rosetta. Mientras tanto, nuestro grupo está llevando a cabo el análisis de partículas de polvo interplanetario (IDPs), algunas de las cuales pueden ser de origen cometario. Al igual que ocurre con los productos obtenidos por irradiación del hielo en nuestros experimentos, algunas IDPs son ricas en material orgánico que contiene oxígeno.

Muñoz-Caro, Guillermo Manuel

433

 

PubMed

O método Grade of Membership (GoM) tem sido cada vez mais utilizado por demógrafos brasileiros e tem a vantagem de possuir um parâmetro que mensura a heterogeneidade individual, com base nas correlações não-observáveis entre as categorias de resposta das variáveis de interesse, gerando um medida do grau de pertencimento de cada indivíduo a perfis extremos. Alguns autores, contudo, chamam atenção para questões importantes na calibragem dos modelos finais que utilizam o programa GoM versão 3.4, como o problema de identificabilidade - soluções múltiplas para parâmetros estimados. Neste artigo, é sugerido um procedimento capaz de identificar um modelo final com solução única que descreva os tipos puros mais fidedignos à base de dados, em uma tentativa de otimização. Para ilustrar esse processo, utilizou-se uma base de dados correspondente a um levantamento econômico e sociodemográfico de uma população de pequenos agricultores residentes ao longo da Rodovia Transamazônica, no Estado do Pará. Também identificou-se a existência de instabilidade nos parâmetros estimados pelo programa GoM 3.4, sendo proposto um método de estabilização de seus valores. Com esses procedimentos combinados, os usuários do programa GoM 3.4 poderão descrever sua base de dados de forma mais adequada e responder às críticas sobre questões de identificabilidade e estabilidade dos modelos resultantes. Essas soluções empíricas são relevantes por afetarem cálculos de prevalência e de incidência de eventos de interesse, além de trazerem consequências importantes sobre o ponto e o momento corretos para intervenções de políticas públicas ou de planejamento prospectivo em análises de projeção. PMID:21709732

Guedes, Gilvan Ramalho; Caetano, André Junqueira; Machado, Carla Jorge; Brondízio, Eduardo Sonewend

2010-01-01

434

Detección y estudio mediante Fluorescencia Inducida por Láser de radicales libres formados por Disociación Multifotónica Infrarroja  

NASA Astrophysics Data System (ADS)

Una de las principales aplicaciones actuales de los procesos de disociación multifotónica inducidos por radiación láser infrarroja (DMI) es la producción de radiales libres, con el fin de estudiar sus propiedades cinéticas y espectroscópicas. La disociación de moléculas poliatómicas en el IR con láseres de CO2 tiene lugar desde la superficie de energía molecular mas baja y conduce generalmente a la formación de fragmentos en el estado electrónico fundamental, con diversos grados de excitación vibracional. En el Grupo de Procesos Multifotónicos del Instituto de Estructura de la Materia del C.S.I.C. hemos puesto a punto la técnica de Fluorescencia Inducida por Láser (LIF) para la detección y análisis en tiempo real de los fragmentos producidos en la DMI inducida mediante uno o dos campos láseres de diferentes longitudes de onda. Objetivos de nuestro trabajo han sido el estudio de los canales de disociación mayoritarios y de las especies transitoria producidas, así como de la distribución de energía interna con que éstas son generadas. En particular hemos detectado mediante LIF las especies: C2, CF, CH, SiH2, CF2, CH2, SiHCl, y CF3 a partir de la disociación de, entre otras, las siguientes moléculas: C2H3Br, C3F6, C4H8Si, C2H5ClSi y CH5ClSi. En este trabajo presentamos algunos de los resultados obtenidos mediante el estudio por LIF de estos radicales: estudio temporal de la señal LIF obtenida con determinación de tiempos de vida, espectros de excitación y fluorescencia, temperaturas vibracionales de formación, variación de la intensidad LIF con el tiempo de retraso entre los láseres de disociación y prueba, etc.

Santos, M.; Díaz, L.; Torresano, J. A.; Rubio, L.; Samoudi, B.

435

Grupos españoles de cálculos ab initio de moléculas de interés astrofísico  

NASA Astrophysics Data System (ADS)

Pocos campos de la química están tan bien adaptados a la modelización por medio de los métodos teóricos de la Química Cuántica como la Astroquímica y la Química de la Atmósfera, donde las interacciones moleculares son, generalmente, lo suficientemente pequeñas para que el modelo de molécula aislada funcione muy bien. En España son varios los grupos teóricos que dedican su esfuerzo de investigación, o parte de él, al estudio de moléculas o procesos de interés en Astrofísica o en atmósferas planetarias. Presentaremos diferentes ejemplos paradigmáticos de esta actividad en la que se exploran desde aspectos estructurales, hasta aspectos espectroscópicos y dinámicos. Entre los últimos, cabe destacar estudios en los que se demuestra la importancia de procesos a dos estados, prohibidos por espín, en la formación astrofísica de diversos derivados de interés. En el tratamiento espectroscópico se han hecho esfuerzos interesantes, que han aunado teoría y experimento, en el estudio de sistemas relevantes desde el punto de vista atmosférico, como los hidratos de ácido nítrico, o el tratamiento espectroscópico de moléculas no rígidas. No menos interesantes son los estudios de fotoabsorción de radicales o de procesos multifotónicos. Son particularmente abundantes los estudios dedicados a la reactividad específica de sistemas de interés astrofísico o atmosférico, con el objetivo de esclarecer vías de formación de determinados compuestos o de proporcionar mecanismos que permitan identificar las etapas reactivas limitantes de reacciones de interés en esos medios y sobre los que no existía información previa. Así, por ejemplo, se han publicado interesantes estudios sobre la formación o propiedades de compuestos de fósforo, de silico o de azufre o sobre mecanismos de reacción en los que intervienen el ozono, el radical nitrato, el radical OH u otras especies. Finalmente, son también particularmente relevantes los estudios que varios grupos españoles han llevado, y siguen llevando a cabo, sobre sistemas débilmente enlazados, como complejos de Van der Waals o complejos por enlace de hidrógeno, que sin duda juegan un papel importante tanto en medios atmosféricos como interestelares.

Yáñez, M.

436

Magnetospheric Response To The Solar Wind Dynamic Pressure Inferred From Polar Cap Index  

NASA Astrophysics Data System (ADS)

The North-East region of Venezuela lies on the border of the friction zone between the Caribbean and South-American tectonic plates, a source of great seismicity. The first written news of an earthquake in the American Continent were those of the earth- quake of september 1530 which caused damage to Cumaná, the first town of that Continent. Since then a continuous series of earthquakes have been reported, many of them with damaging effects on Cumaná; those caused in the 1929 earthquake (17-01- 1929; with IX Mercalli degrees) were well described by Sidney Paige in the Vo. 20 of the B.S.S.A., March, 1930. An earthquake of magnitude 5.9 {11-06-1986; 10.26z N,63.29z W} was the trigger for the Unesco`s intention to declare the Estado Sucre as a pilot zone for seismological studies. In 1991 a report issued by the International Institute of Earthquake Prediction Theory and Matematical Geophysics (Academy of Sciences, U.R.S.S.) stated that the ocurrence of an earthquake of great magnitude which could affect the North-East region of Venezuela was possible. Other studies of the seismicity of the region have been carried out. The interest of the authorities and of the seismologists reached a peak with the earthquake of july 1997 (10.456z N, 63.555z W), with a magnitude of 6.9; there was a death toll of 73, around 528 people injured and more than 2000 houses needed to be completely rebuilt. A study of micro- zonification of the city of Cumaná has been carried out recently and the results of this study will be presented also to this Congress.

Lukianova, R.; Troshichev, O.

437

Argentina: the road to energy independence. Part 1. Petroleum and natural gas  

SciTech Connect

It is established that Argentina is now self-sufficient in oil. The only import contract (with Saudi Arabia) was to expire at the end of 1982. But new discoveries are needed and more conservation measures taken to avoid imports without endangering industrial development. Oil reserves currently are about 2500 million barrels. Production was 179.7 million barrels in 1980 and 181.4 million barrels in 1981; production in 1982 should slightly exceed that of 1981. Natural gas reserves have increased during the past 16 years from almost 6321 million cubic feet in 1966 to 22,919 million cubic feet in 1982. Brazil and Uruguay are suggested as possible importers. Argentine territory contains 19 sedimentary basins (43% in the continent and 36% on its continental shelf). According to Gas del Estado, the 10 main sedimentary basins have an estimated 21,189 million cubic feet of proven reserves of natural gas. One official estimates that there are also some 8,829,000 million cubic feet more in the country. Argentina's natural gas production in the first half of 1982 was 196,173 million cubic feet; production in 1981 was 399,056 million cubic feet; 368,191 in 1980; 342,517 in 1979, and 317,055 in 1978. Natural gas participation in total national energy consumption is now 23%, and oil is 67%. Officials expect natural gas to account for 30% by 1985. The Energy Detente fuel price/tax series is updated for countries of the Eastern Hemisphere.

Not Available

1982-12-09

438

[Reproductive phenology of three vegetation types from a coastal plain of Paraguana Penninsula, Venezuela].  

PubMed

Reproductive phenology of 51 plant species was evaluated according to life form and vegetation types in a coastal plain of the Paraguaná Peninsula, Estado Falcón, Venezuela. Plant species distribution according to three vegetation types (herbaceous littoral, herbaceous psamophil, and mangrove area) was determined. Life form frequency was different according to vegetation type. Herbaceous littoral and herbaceous psamophil vegetation were dominated by herbaceous species; woody species were mostly frequent in the mangrove vegetation. Phenological data revealed that 14 (27.5%) plant species flower and fruit year-round; 23 (45.1%) plant species flower and fruit at the beginning of the wet season; seven (13.7%) plant species flower at the end of wet season, and seven (13.7%) more flower at the beginning of the dry season. Flowsring and fruiting phenology showed similar frequency distribution during the year; reproductive phenology was independent of life forms. Flowering and fruiting peaks occurred during the rainy season and the beginning of the dry season for trees and perennial herbs, and from one to three months later for shrubs and annual herbs. The lowest proportion of flowering and fruiting occurred before rain increase for all life forms. Flowering and fruiting phenologies were similar for the three vegetation types evaluated: flowering peak occurred during the lowest value of precipitation, three to four months after precipitation peak, and fruiting peak occurred four months later from the precipitation peak. These results suggest that flowering and fruiting phenology were not affected by life form and vegetation types. The peaks of flowering and fruiting during the lowest values of precipitation may be considered as a slow and late response to the precipitation maximum, and to the proximity between maximum and minimum of precipitation. PMID:12945492

Lemus-Jiménez, Luis José; Ramírez, Nelson

2002-01-01

439

Precessão do jato de 3C120: simulações hidrodinâmicas 3D  

NASA Astrophysics Data System (ADS)

Observações com técnicas de interferometria com longa linha de base têm mostrado a existência de um jato relativístico com componentes superluminais na região central de 3C 120. Estas componentes são ejetadas em distintas direções no plano do céu e com diferentes velocidades aparentes. Estas características foram interpretadas em trabalhos anteriores como efeitos da precessão do jato relativístico. Neste trabalho, realizamos simulações tri-dimensionais do jato de 3C 120 utilizando os parâmetros de precessão determinados em trabalhos anteriores e variando as características iniciais do jato e meio ambiente, tais como densidade numérica e temperatura. Todas as simulações foram feitas com o código hidrodinâmico YGUAZÚ-A, assumindo-se um jato adiabático descrito por uma equação de estado relativística. Pelo fato de estarmos utilizando um código hidrodinâmico, nós assumimos que a intensidade do campo magnético e a distribuição de partículas, necessários para se calcular a emissão sincrotron, são proporcionais à pressão hidrodinâmica. Comparação entre dois cenários distintos, nos quais o material do jato é ejetado com velocidade constante (jato contínuo) e com velocidade modulada por um padrão sinusoidal no tempo (jato intermitente), é apresentada e discutida. Para jatos que apresentam fenômenos de precessão e intermitência, com amplitude de variação na velocidade de injeção maior que dez por cento da velocidade média de injeção, a hipótese balística, controlada pela intermitencia, é mais provável. Por outro lado, para jatos com precessão mas sem intermitência (ou com amplitude de variabilidade em velocidade mais baixa que no caso anterior), o efeito da precessão na morfologia do jato não é desprezível. Portanto, de um modo geral, ambos efeitos (precessão e movimentos balísticos) devem estar concorrendo para afetar a morfologia dos jatos superluminais.

Caproni, A.; de Gouveia dal Pino, E. M.; Abraham, Z.; Raga, A. C.

2003-08-01

440

Mechanisms of Earth activity forsed by external celestial bodies:energy budjet and nature of cyclicity  

NASA Astrophysics Data System (ADS)

In given report we discuss tidal and non-tidal mechanisms of forced tectonic (endogenous) activity of the Earth caused by gravitational attraction of the Moon, Sun and the planets. On the base of the classical solution of the problem of elasticity for model of the Earth with concentric mass distribution the evaluations of the tidal energy and power of Earth lunar-solar deformations, including their joint effect, were obtained. Important role of the joint energetic effect of rotational deformation of the Earth with lunar and solar tides was illustrated. Gravitational interaction of the Moon and Sun with non-spherical, non-homogeneous shells of the Earth generates big additional mechanical forces and moments of the interaction of the neighboring shells (rigid core, liquid core, mantle, lithosphere and separate plates). Acting of these forces and moments in the different time scales on the corresponding sells generates cyclic perturbations of the tensional state of the shells, their deformations, small relative translational displacements and small relative rotational oscillations of the shells. In geological period of time it leads to a fundamental tectonic reconstruction of the Earth. These additional forces and moments of the cyclic celestial-mechanical nature produce cyclic deformations of the all layers of the body and organize and control practically all natural processes. The additional force between mantle and core is cyclic and characterized by the wide basis of frequencies typical for orbital motions (of the Sun, Moon and planets), for rotational motion of the Earth, Moon and Sun and for many from observed natural processes. The problem about small relative translatory-rotary motion of the two shells separated by the thin viscous-elastic layer is studied. The differential equations of motion were obtained and have been studied in particular cases (plane motion of system; case of two axisymmetrical interacting shells and oth.) by approximate methods of small parameter and methods of averaging. Some regimes of the relative translatory-rotary motions of the shells were described in analytical form. Wide set observed geodynamical and geophysical phenomena can be illustrated as results or as reflections of the small and slow relative displacements of the shells in corresponding time-scales. Barkin's work was accepted and financed by RFBR grant 02-05-64176 and by grant SAB2000-0235 of Ministry of Education of Spain (Secretaria de Estado de Educacion y Universidades).

Barkin, Yu. V.; Ferrandiz, J. M.

2003-04-01

441

Onshore and offshore wind resource evaluation in the northeastern area of the Iberian Peninsula: quality assurance of the surface wind observations  

NASA Astrophysics Data System (ADS)

Offshore wind energy is becoming increasingly important as a reliable source of electricity generation. The areas located in the vicinity of the Cantabrian and Mediterranean coasts are areas of interest in this regard. This study targets an assessment of the wind resource focused on the two coastal regions and the strip of land between them, thereby including most of the northeastern part of the Iberian Peninsula (IP) and containing the Ebro basin. The analysis of the wind resource in inland areas is crucial as the wind channeling through the existing mountains has a direct impact on the sea circulations near the coast. The thermal circulations generated by the topography near the coast also influence the offshore wind resource. This work summarizes the results of the first steps of a Quality Assurance (QA) procedure applied to the surface wind database available over the area of interest. The dataset consists of 752 stations compiled from different sources: 14 buoys distributed over the IP coast provided by Puertos del Estado (1990-2010); and 738 land sites over the area of interest provided by 8 different Spanish institutions (1933-2010) and the National Center of Atmospheric Research (NCAR; 1978-2010). It is worth noting that the variety of institutional observational protocols lead to different temporal resolutions and peculiarities that somewhat complicate the QA. The QA applied to the dataset is structured in three steps that involve the detection and suppression of: 1) manipulation errors (i.e. repetitions); 2) unrealistic values and ranges in wind module and direction; 3) abnormally low (e.g. long constant periods) and high variations (e.g. extreme values and inhomogeneities) to ensure the temporal consistency of the time series. A quality controlled observational network of wind variables with such spatial density and temporal length is not frequent and specifically for the IP is not documented in the literature. The final observed dataset will allow for a comprehensive understanding of the wind field climatology and variability and its association with the large scale atmospheric circulation as well as their dependence on local/regional features like topography, land-sea contrast, etc. In future steps, a high spatial resolution simulation will be accomplished with the WRF mesoescale model in order to improve the knowledge of the wind field in the area of interest. Such simulation will be validated by comparison with the observational dataset. In addition, studies to analyze the sensitivity of the model to different factors such as the parameterizations of the most significant physical processes that the model does not solve explicitly, the boundary conditions that feed the model, etc. will be carried out.

Hidalgo, A.; González-Rouco, J. F.; Jiménez, P. A.; Navarro, J.; García-Bustamante, E.; Lucio-Eceiza, E. E.; Montávez, J. P.; García, A. Y.; Prieto, L.

2012-04-01

442

Spirituality and Cultural Identification Among Latino and Non-Latino College Students  

PubMed Central

The purposes of this study were to examine (a) differences in spiritual perspectives and practices of Latino and non-Latino young adults and (b) the cultural relevance of the Latino Spiritual Perspective Scale (LSPS). Studies indicate that spiritual perspectives are embedded within cultural group norms and vary significantly across ethnic groups. A cross-sectional survey design was used with a convenience sample of 223 Latino and non-Latino university students in the Southwestern United States. The Spiritual Perspective Scale (SPS), the LSPS, the Orthogonal Cultural Identification Scale, and a demographic questionnaire were used. Latinos scored significantly higher than non-Latinos in both measures of spiritual perspectives. Self-reported behavioral measures, such as frequency of personal prayer, were also higher among the Latino group. Latino cultural identification was the only significant predictor of LSPS scores. Findings from this study indicate that spirituality among Latinos has meanings specific to the cultural group context. These findings have implications for nursing research involving the conceptualization and measurement of spirituality among multiethnic groups. Los propósitos de este estudio eran examinar: (a) diferencias en perspectivas espirituales y prácticas de jóvenes Latinos y no Latinos; y (b) la relevancia cultural de la Escala de la Perspectiva Espiritual Latina. Estudios indican que perspectivas espirituales están incrustadas entre normas culturales del grupo y varían considerablemente entre grupos étnicos. Un diseño transversal y de encuesta fue utilizado con una muestra de conveniencia de 233 estudiantes universitarios Latinos y no Latinos en el Suroeste de los Estados Unidos. La Escala de la Perspectiva Espiritual (EPE), la Escala de la Perspectiva Espiritual Latina (EPEL), la Escala Ortogonal de Identificación Cultural, y un cuestionario demográfico fueron utilizados. Los Latinos calificaron considerablemente más alto que los no Latinos en ambas medidas de perspectivas espirituales. Medidas de comportamiento auto-reportadas, como la frecuencia de oración, también estuvieron más altas en el grupo Latino. La identificación con la cultura Latina fue el único vaticinador de las calificaciones de la EPEL. Los resultados de este estudio indican que la espiritualidad entre Latinos tiene significados específicos al contexto del grupo cultural. Estas conclusiones tienen implicaciones para las investigaciones de enfermería que involucran la conceptualización y medida de la espiritualidad entre grupos multiétnicos.

Campesino, Maureen; Belyea, Michael; Schwartz, Gary

2010-01-01

443

Courtship behavior of different wild strains of Ceratitis Capitata (Diptera: Tephritidae)  

SciTech Connect

This study documents differences in the courtship behavior of wild strains of Ceratitis capitata (Wiedemann) from Madeira (Portugal), Hawaii (U.S.A.), Costa Rica, and Patagonia (Argentina). Some traits showed large variations and others substantial overlaps. The angle at which the male faced toward the female at the moment of transition from continuous wing vibration and intermittent buzzing changed very little during the course of courtship in all strains, but males from Madeira tended to face more directly toward the female than other males. Females tended to look more, and more directly, toward the males as courtship progressed in all strains. The distance between male and female tended to decrease as courtship proceeded in all strains, but the distances at which males initiated continuous vibration, intermittent buzzing, and jumped onto the female were relatively less variable between strains, except for the strain from Costa Rica. Flies of Madeira courted for longer and the male moved his head and buzzed his wings longer than the other strains. (author) [Spanish] Este estudio documenta diferencias en el comportamiento de cortejo de cepas silvestres de Ceratitis capitata (Wied.) provenientes de Madeira (Portugal), Hawaii (Estados Unidos de Norte America), Costa Rica y Patagonia (Argentina). Algunas caracteristicas mostraron grandes variaciones y traslape substancial. Los angulos a los cuales los machos miraron hacia las hembras cambiaron muy poco en el momento de la transicion de la vibracion continua al zumbido intermitente durante el curso del cortejo en todo las cepas, pero los machos de Madeira tendieron a enfrentar mas directamente a la hembra que otros machos. Los angulos de las hembras disminuyeron claramente durante el cortejo en todas las cepas. La distancia entre el macho y la hembra tendio a disminuir conforme el cortejo continuaba en todas las cepas, pero las distancias a las cuales los machos iniciaron la vibracion continua, el zumbido intermitente, y el salto sobre la hembra eran relativamente menos variables entre cepas excepto la cepa de Costa Rica. Moscas de Madeira cortejaron mas tiempo y el macho moviosu cabeza y zumbaba sus alas mas prolongadamente que las otras cepas. (author)

Briceno, D. [Escuela de Biologia, Universidad de Costa Rica, Ciudad Universitaria (Costa Rica); Eberhard, W. [Escuela de Biologia, Universidad de Costa Rica, Ciudad Universitaria and Smithsonian Tropical Research Institute (Costa Rica); Vilardi, J. [Dpto. de Ciencias Biologicas, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, 1428 Buenos Aires (Argentina); Cayol, J.-P. [Technical Cooperation Division, IAEA, Wagramerstrasse 5, P.O. Box 100 A-1400, Vienna (Austria); Shelly, T. [A. C. , D. , E. USDA/APHIS/CPHST, 41-650 Ahiki St. Waimanalo, HI 96795 (United States)

2007-03-15

444

Open-field host specificity test of Gratiana boliviana (Coleoptera: Chrysomelidae), a biological control agent of tropical soda apple (Solanaceae) in the United States  

SciTech Connect

An open-field experiment was conducted to assess the suitability of the South American leaf feeding beetle Gratiana boliviana Spaeth for biological control of Solanum viarum Dunal in the USA. An open-field test with eggplant, Solanum melongena L., was conducted on the campus of the University of Buenos Aires, Argentina, and a S. viarum control plot was established 40 km from the campus. One hundred adult beetles were released in each plot at the beginning of the experiment during the vegetative stage of the plants, and forty additional beetles were released in the S. melongena plot at the flowering stage. All the plants in each plot were checked twice a week and the number of adults, immatures, and eggs recorded. Results showed almost a complete rejection of eggplant by G. boliviana. No noticeable feeding damage was ever recorded on eggplant. The experiment was ended when the eggplants started to senesce or were severely damaged by whiteflies and spider mites. The results of this open-field experiment corroborate previous quarantine/laboratory host-specificity tests indicating that a host range expansion of G. boliviana to include eggplant is highly unlikely. Gratiana boliviana was approved for field release in May 2003 in the USA. To date, no non-target effects have been observed either on eggplant or native species of Solanum. (author) [Spanish] Una prueba de campo fue conducida para evaluar la especificidad del escarabajo suramericano defoliador Gratiana boliviana Spaeth para control biologico de Solanum viarum Dunal en los Estados Unidos. La prueba con berenjena se realizo en el campo experimental de la Universidad de Buenos Aires, Argentina, y una parcela control con S. viarum fue establecida a 40 km. Cien escarabajos adultos fueron liberados en cada parcela al inicio del experimento durante la fase vegetativa, y cuarenta escarabajos adicionales fueron liberados en la parcela de berenjena durante la floracion. Todas las plantas en cada parcela fueron inspeccionadas dos veces a la semana y el numero de adultos, larvas, y posturas fueron registrados. Resultados indicaron un casi completo rechazo de la berenjena por G. boliviana. Ningun dano visible de defoliacion en la berenjena fue detectado. Las pruebas concluyeron cuando las plantas de berenjena alcazaron su madurez o fueron severamente danadas por mosca blanca y acaros. Resultados corroboran previas pruebas de especificidad en laboratorio/cuarentena que indican que la berenjena no es un hospedero de G. boliviana y que la posibilidad de llegar a ser una plaga de este cultivo es muy remota. Gratiana boliviana fue aprobado para ser liberado en el campo en mayo del 2003. Ningun dano ha sido observado hasta la fecha a plantas no blanco. (author)

Gandolfo, D.; McKay, F. [USDA-ARS South American Biological Control Laboratory, Hurlingham (Argentina); Medal, J.C.; Cuda, J.P. [University of Florida, Department of Entomology and Nematology, Gainesville, FL 32611 (United States)

2007-03-15

445

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

NASA Astrophysics Data System (ADS)

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

Borges, B.; Baptista, R.

2003-08-01

446

Depth Seismic-Migration Modeling Offshore `Tierra Del Fuego', Argentina (54° 25' S)  

NASA Astrophysics Data System (ADS)

Within the framework of the TESAC Project (Tectonic Evolution of the South America-Scotia plate boundary during the Cenozoic), about 900 km of multichannel seismic reflection profiles were acquired off the Atlantic coast of the Tierra del Fuego Island. The profiles cut across the South America-Scotia plate boundary, a transform margin which traverses in an E-W direction the Island. Data processing and interpretation of a seismic reflection profile is presented in this contribution. A robust post-stack technique involved depth-migration of the seismic section, using an interval-velocity model of the upper Crust adjusted by iterative processing. An interpreted seismic- velocity section (which trends roughly NW-SE), shows a complex superposition of different tectonic structures, with presence of extensional, compressional and transtensional features in the area located to the north of Isla de los Estados. The profile, which crosses the offshore part of the Magallanes fold-and-thrust belt, images the deep structural framework of part of this tectonic province. The identification of acoustic fabrics and seismic discontinuities allowed us to recognize four main units. Overlaying the acoustic basement (Seismic unit 1), there is another unit (Seismic unit 2) which exhibits some reflector packages of high amplitude; this unit must be related to the volcanic and volcaniclastic sequences of Tobífera/Lemaire Fms. The Seismic Unit 3 displays internal reflector configurations of moderate amplitude and continuity and low-to-moderate frequency; the Yaghán/Beauvoir Fms must be the onshore equivalent of this unit. An uppermost seismic layer (Unit 4) may be correlated with the Tertiary sediments of the Magallanes foreland basin which were involved in the fold and thrust belt. A major structure identified in the studied seismic profile is a SE structural high (which involves the units 1, 2 and 3) and a NW down-faulted area. The latter display folds of kilometric size (3-4 km). Steeply dipping (mainly to the south) reverse faults cut through the folds. Some of these faults represent old extensional faults of the Middle- Mesozoic Rocas Verdes marginal basin rifting, which have been subsequently inverted by compressional stress fields. In addition, a noticeable flower fault system is recognized in the seismic profile, which involves both the sedimentary cover and the acoustic basement. This fault is interpreted as the result of shear stresses produced along the transcurrent South America-Scotia plate boundary.

Comínguez, A. H.; Flores, J.; Tassone, A.

2007-05-01

447

Movement of water through the thick unsaturated zone underlying Oro Grande and Sheep Creek Washes in the western Mojave Desert, USA  

NASA Astrophysics Data System (ADS)

Previous studies indicate that a small quantity of recharge occurs from infiltration of streamflow in intermittent streams in the upper Mojave River basin, in the western Mojave Desert, near Victorville, California. Chloride, tritium, and stable isotope data collected in the unsaturated zone between 1994 and 1998 from boreholes drilled in Oro Grande and Sheep Creek Washes indicate that infiltration of streamflow occurs to depths below the root zone, and presumably to the water table, along much of Oro Grande Wash and near the mountain front along Sheep Creek Wash. Differences in infiltration at sites along each wash are the result of hydrologic variables such as proximity to the mountain front, quantity of streamflow, and texture of the subsurface deposits. Differences in infiltration between the washes are the result of large-scale geomorphic processes. For example, Oro Grande wash is incised into the Victorville fan and infiltration has occurred at approximately the same location over recent geologic time. In contrast, Sheep Creek Wash overlies an active alluvial fan and the stream channel can move across the fan surface through time. Infiltration does not occur to depths below the root zone at control sites outside of the washes. Résumé. Des études précédentes indiquent qu'une faible part de la recharge est assurée par l'infiltration d'écoulement de surface dans des cours temporaires du bassin supérieur de la rivière Mojave, dans la partie occidentale du désert Mojave, près de Victorville (Californie). Des données portant sur les chlorures, le tritium et les isotopes stables, recueillies dans la zone non saturée entre 1994 et 1998 grâce à des forages réalisés dans les fonds de vallées d'Oro Grande et de Sheep Creek, montrent que l'infiltration des écoulement de surface se produit en profondeur sous la zone racinaire, et probablement jusqu'à la nappe, le long de la plus grande partie du cours de l'Oro Grande et au pied des montagnes le long de celui de Sheep Creek. Des différences dans l'infiltration aux sites le long de chacun des fonds de vallée sont la conséquence de variables hydrologiques comme la proximité du pied des montagnes, la quantité d'écoulement de surface et la texture des dépôts. Des différences dans l'infiltration entre les fonds de vallée résultent de processus géomorphologiques à grande échelle. Par exemple, le vallon de l'Oro Grande entaille le cône de déjection de Victorville et l'infiltration s'est toujours produite à peu près au même endroit lors des époques géologiques récentes. Au contraire, le fonds de la vallée de Sheep Creek passe sur un cône alluvial actif et le lit du cours d'eau peut divaguer à la surface du cône au cours du temps. L'infiltration ne se produit pas en profondeur sous la zone racinaire dans les sites hors des fonds de vallée. Resumen. Estudios previos indican que hay una pequeña contribución a la recarga por infiltración de aguas superficiales en cauces intermitentes de la cuenca del Río Mojave, en el sector occidental del Desierto de Mojave, cerca de Victorville (California, Estados Unidos de América). Los datos de cloruros, tritio e isótopos estables en la zona no saturada, registrados en sondeos perforados en los torrentes Oro Grande y Sheep Creek entre 1994 y 1998, indican que dicha infiltración tiene lugar hasta profundidades superiores a la zona radicular y, presumiblemente, hasta el nivel freático. Esto acontece en gran parte del Oro Grande Wash y cerca del frente montañoso, a lo largo del Sheep Creek Wash. Las diferencias en la infiltración en puntos de cada torrente resultan de variables hidrológicas tales como la proximidad al frente montañoso, el caudal en los cauces y la textura de los depósitos subsuperficiales. Las diferencias en la infiltración entre ambos torrentes son causadas por procesos geomórficos de gran escala. Por ejemplo, el Oro Grande Wash está encajado en el abanico de Victorville, de modo que la infiltración se ha estado produciendo en aproximadamente el mismo punto durante las époc

Izbicki, John; Radyk, John; Michel, Robert

2002-04-01

448

Farmyard Manure and Fertilizer Effects on Seed Potato (Solanum tuberosum L.) Yield in Green House Production  

NASA Astrophysics Data System (ADS)

Nowadays is widely well know that the potato is an important vegetable crop at Brazíl. It is grown on about 173.000 ha, with total yield of 2.6 million tons year-1. The average yield is 15 t ha-1. This level is very low because degeneration of crop is rapid under high temperature and high viruses pressure. Therefore seed potato propagation and production is principal on consumption potato production. This is why we found it necessary to develop it. The latossolo vermelho soil-farmyard manure- burnt rice straw-fertilizer 4N:14P:8K greenhouse pot trial was set up at the National Vegetable Crops Research Center, Brasília-DF, Brazíl in 1990. The methods of the experiments were soil x farmyard manure x burnt rice straw, soil x 4N:14P:8K fertilizer and soil x farmyard manure x burnt rice straw x 4N:14P:8K fertilizer on randomized block design in total 29 combination of treatments in 5, 5 and 3 repetitions with in a total parcel of 116. According to chemical analysis of the a., soil, b., farmyard manure and c., burnt rice straw the agrochemistry parameters were as follows (estimated datas): a., latossolo vermelho soil: CaCO3 0.3-0.7%, humo 0.9-1.0%, pH (H2O) 5.3, pH (KCl) 4.5, AL- P2O5 3.2-3.5 mg kg-1, AL- K2O 180 mg kg-1, Mg (KCl) 70 mg kg-1, EDTA-Zn 0.5-0.8 mg kg-1, EDTA-Cu 0.5-0.6 mg kg-1, b., farmyard manure: N 1.8 g kg-1, P2O5 2.0 g kg-1, K2O 4.0 g kg-1, c., burnt rice straw: N 0.8 g kg-1, P2O5 7.0 g kg-1, K2O 4.5 g kg-1. The experimental datas were estimated by analysis of variance, ANOVA and MANOVA. The main conclusions were as follows: 1. Mixture of 80% latossolo vermelho, 10% burnt rice straw and 10% farmyard manure were shown best performance on seed potato productivity. The piece of tubers with a 0-20 mm (consumption seeds) was increased by 77%. 2. Total seed potato number was reached maximum at 10.8 g pot-1 4N:14P:8K fertilizer regarding to average of treatments with a 33%. 3. Dry biomassa production plant-1 was decreased by high dose of 4N:14P:8K fertilizer (18.0 g pot-1) with a hard effect (57%). Our results are shown that it was possible developing of the seed potato production under tropical greenhouse conditions by optimalised soil-organic matter-fertilizer system. This datas should be as indicators to sustainable field potato advisory systems. Keywords: potato (Solanum tuberosum L.), greenhouse, latossolo vermelho soil, farmyard manure, burnt rice straw, 4N:14P:8K fertilizer, sustainability, yield Introducáo: Importância e situação actual em produção da batata no Brazíl A batata é atualmente uma das hortaliças de maior importância no Brasíl (Márton 2000a., 2000b.) com um cultivo annual médio de 173.000 ha e uma produção de 2600000 t. A produtividade médio nacional é de 15 t ha-1, muito baixa se considerar que é possivel a obtenção de rendimentos acima de 40 t ha-1. Observa- se também, que existe variação no produtividade entre regiões e estados. E importante como fonte de alimento pelo seu alto valor nutricional a quantidade produzida muito superior por unidade de área a tempo, se comparada com diversas outras culturas (László 2000b., 2000c.). Os estados que tradicionalmente produzem batata em maior ou menor escala são indicados em seguente: Pernambuco, Ceará, Sergipe, Goiás, Mato Grosso, Mato Grosso do Sul, Rondonia e Acre. Os plantios predominantes são o das águas e das secas, sendo o de inverno bem menos expressivo, pois poucas áreas permitem o seu cultivo, na maioria dos casos necessitando- se de irrigação. Considerando as três épocas de plantio e diferentes condições climaticas brasileiras, podemos definir de um modo geral o plantio de batata no Brasíl da seguinte maneira: Nordeste e Centro- Oeste- plantio de inverno, Sudeste- plantio das águas, secas e inverno, Sul- plantio das aguas, secas e inverno. Sendo este último em áreas muito limitadas. Dentre as hortaliças a batata é uma das culturas mais estudadas actualmente. Os principais problemas que afetam a cultura da batata podem ser de ordem agronómica, economica e comercial. Como exemplos destes podem se

László, M.

2009-04-01

449

Groundwater recharge and chemical evolution in the southern High Plains of Texas, USA  

NASA Astrophysics Data System (ADS)

The unconfined High Plains (Ogallala) aquifer is the largest aquifer in the USA and the primary water supply for the semiarid southern High Plains of Texas and New Mexico. Analyses of water and soils northeast of Amarillo, Texas, together with data from other regional studies, indicate that processes during recharge control the composition of unconfined groundwater in the northern half of the southern High Plains. Solute and isotopic data are consistent with a sequence of episodic precipitation, concentration of solutes in upland soils by evapotranspiration, runoff, and infiltration beneath playas and ditches (modified locally by return flow of wastewater and irrigation tailwater). Plausible reactions during recharge include oxidation of organic matter, dissolution and exsolution of CO2, dissolution of CaCO3, silicate weathering, and cation exchange. Si and 14C data suggest leakage from perched aquifers to the High Plains aquifer. Plausible mass-balance models for the High Plains aquifer include scenarios of flow with leakage but not reactions, flow with reactions but not leakage, and flow with neither reactions nor leakage. Mechanisms of recharge and chemical evolution delineated in this study agree with those noted for other aquifers in the south-central and southwestern USA. Résumé. L'aquifère libre des Hautes Plaines (Ogallala) est le plus vaste aquifère des états-Unis et la ressource de base pour l'eau potable de la région semi-aride du sud des Hautes Plaines du Texas et du Nouveau-Mexique. Des analyses de l'eau et des sols prélevés au nord-est d'Amarillo (Texas), associées à des données provenant d'autres études dans cette région, indiquent que des processus intervenant au cours de l'infiltration contrôlent la composition de l'eau de la nappe libre dans la moitié septentrionale du sud des Hautes Plaines. Les données chimiques et isotopiques sont compatibles avec une séquence de précipitation épisodique, avec la reconcentration en solutés dans les sols des hautes terres par évapotranspiration, avec le ruissellement et l'infiltration dans les playas et les fossés (modifiée localement par l'écoulement en retour des eaux usées et des laisses d'irrigation). Des réactions probables intervenant au cours de la recharge sont l'oxydation de la matière organique, la dissolution et le dégazage du CO2, la dissolution du CaCO3, l'altération des silicates et l'échange de cations. Les données concernant Si et 14C laissent penser qu'il existe une drainance descendante à partir d'aquifères perchés vers l'aquifère des Hautes Plaines. Des modèles vraisemblables de bilan de matière pour l'aquifère des Hautes Plaines prennent en compte des scénarios d'écoulement avec drainance mais sans réactions, des écoulements avec réactions mais sans drainance et des écoulements sans réactions ni drainance. Les mécanismes de recharge et d'évolution chimique déterminés dans cette étude sont en accord avec ceux mis en évidence dans d'autres aquifères du centre sud et du sud-ouest des états-Unis. Resumen. El acuífero libre de High Plains (Ogallala) es el mayor de los Estados Unidos y supone la fuente principal de abastecimiento en la región semiárida del sur de High Plains (Texas) y de Nuevo México. Los análisis de agua y suelos realizados al nordeste de Amarillo (Texas), junto con los datos de otros estudios regionales, indican que los procesos que tienen lugar durante la recarga del acuífero controlan la composición de las aguas subterráneas en la mitad septentrional de los High Plains del Sur. Los datos isotópicos y hidroquímicos son coherentes con una secuencia de episodios de precipitación, concentración de solutos en la parte superior del suelo por evapotranspiración, escorrentía, e infiltración a través de 'playas' y zanjas (modificadas localmente por los flujos de retorno de aguas residuales y de excedentes de riego).

Fryar, Alan; Mullican, William; Macko, Stephen

2001-11-01

450

The migration, dissolution, and fate of chlorinated solvents in the urbanized alluvial valleys of the southwestern USA  

NASA Astrophysics Data System (ADS)

The migration, dissolution, and subsequent fate of spilled chlorinated solvents in the urban alluvial valleys of the southwestern U.S. appear to be governed by a unique set of hydrogeologic and geochemical processes occurring within terrigeneous clastic depositional systems. The alluvial and lacustrine fill of the basins, the trapping of solvents in fine-grained sediments beneath the urbanized valley centers, the oxic conditions typical of the deeper alluvium, and the contaminant-transport patterns produced by large-scale basin pumping combine to produce long aqueous-phase plumes derived from the dissolution of trapped chlorinated solvents. Although of limited aqueous solubility, these dense solvents are sufficiently mobile and soluble in the southwestern alluvial valleys to have produced aqueous plumes that have migrated several kilometers through the deeper alluvium and have contaminated valuable water-supply well fields in California, Arizona, and New Mexico. The typical length of these plumes and the presence of oxic groundwater indicate that it is unlikely that natural attenuation will be a practical remedial option in the southwestern alluvial valleys or in other alluvial systems in which similar hydrogeologic and geochemical conditions exist. Résumé La migration, la dissolution et l'évolution consécutive des rejets de solvants chlorés dans les vallées alluviales du sud-ouest des États-Unis paraissent déterminées par un même ensemble de processus hydrogéologiques et géochimiques intervenant dans des formations de dépôts clastiques terrigènes. Les remplissages alluviaux et lacustres des bassins, le piégeage des solvants par des sédiments fins sous les centres des vallées urbanisées, les conditions oxiques typiques des alluvions plus profondes et les types de transport de contaminants provoqués par le pompage à l'échelle du bassin se combinent pour produire des panaches, étendus dans la phase aqueuse, provenant de la dissolution de solvants chlorés piégés. Malgré leur faible solubilité dans l'eau, ces solvants denses sont suffisamment mobiles et solubles pour avoir produit, dans le sud-ouest des vallées alluviales, des panaches aqueux qui ont migré de plusieurs kilomètres dans les alluvions plus profondes et ont contaminé des champs captants pour l'eau potable en Californie, en Arizona et au Nouveau-Mexique. La longueur de ces panaches et la présence d'eau souterraine en conditions oxiques indiquent qu'il est peu probable que la décroissance naturelle soit un recours pratique de décontamination dans les vallées alluviales du sud-ouest ou dans d'autres systèmes alluviaux dans lesquels existent des conditions hydrogéologiques et géochimiques semblables. Resumen La migración, disolución y transporte de compuestos clorados en valles aluviales urbanos del sudoeste de los Estados Unidos de América parecen estar gobernados por un conjunto único de procesos hidrogeológicos y geoquímicos que tienen lugar en los depósitos clásticos. El relleno aluvial y lacustre de las cuencas, la inmovilización de los solutos en sedimentos de grano fino bajo las zonas urbanizadas, los condiciones óxicas típicas del aluvial profundo y las direcciones de transporte regidas por los fuertes bombeos en las cuencas se combinan para producir grandes penachos en fase acuosa procedentes de la disolución de los compuestos clorados atrapados en el medio. Aunque la solubilidad de estos compuestos clorados densos es pequeña, es suficiente para producir penachos que en algunos casos se han desplazado varios kilómetros a través del aluvial profundo y han llegado a contaminar zonas de extracción muy productivas en California, Arizona y Nuevo México. La longitud de estos penachos y la presencia de agua subterránea oxidante indican que es improbable que la degradación natural sea un buen método de limpieza de estos acuíferos o de otros sistemas aluviales que presenten características hidrogeológicas y geoquímicas semejantes.

Jackson, R. E.

451

Efectos de la irradiación iónica en hielos de moléculas carbonadas  

NASA Astrophysics Data System (ADS)

En Astrofísica podemos encontrar numerosos contextos en los cuales se observan moléculas en estado sólido que, en condiciones estándar de presión y temperatura, se encontrarían como gases o líquidos. Dichas moléculas se denominan hielos y han sido observadas en nubes densas del medio interestelar, en envolturas circumestelares, en satélites del Sistema Solar, en cometas, etc. Los hielos pueden ser alterados en su composición química debido a diversos factores como por ejemplo variaciones de temperatura o aportes energéticos por parte de la irradiación, ya sea tanto de fotones ultravioleta como de iones. Dependiendo del escenario astrofísico que analicemos, unos factores cobran más importancia que otros. Los experimentos de laboratorio muestran el efecto que produce sobre la composición de los hielos la irradiación iónica, en particular sobre los que contenían alguna molécula con átomos de carbono. Dicha composición se analiza con espectroscopía IR en el rango de 2 a ˜ 25? m. La aplicabilidad de los resultados de los experimentos es distinta dependiendo de la composición química inicial de los hielos, del tipo de ion utilizado y de la dosis total de irradiación. Existen efectos generales de la irradiación sobre la materia en los experimentos de relevancia astrofísica como son: - la formación de nuevas moléculas, que pueden incluir o no el ion incidente; - la progresiva pérdida de hidrógeno (carbonización) cuando irradiamos muestras que originalmente contienen una determinada relación carbono/hidrógeno; - la variación de la temperatura de sublimación que presentan algunos hielos. Esto puede suceder tanto en hielos que estaban presentes antes de la irradiación como en hielos formados por ésta. Se presentará el papel del ion en la formación de nuevas moléculas a partir de las que originalmente se encontraban en el hielo. Al penetrar en él, el ion provoca distintos procesos como rotura de enlaces y excitaciones electrónicas. En la mayor parte de los casos las especies producidas por la rotura del enlace, se recombinan volviendo a formar la molécula original. Sin embargo un pequeño porcentaje es capaz de formar nuevas moléculas. Si el ion queda implantado en el hielo y es reactivo (H+, C+,ldots) podría formar parte de una molécula nueva que incorpora un átomo que inicialmente no se encontraba presente en el hielo. También se presentará un contraejemplo para demostrar que no es posible asegurar que siempre que implantemos un ion reactivo, éste formará parte de nuevas moléculas en la mezcla. También se presentará la formación de nuevas moléculas a partir de la irradiación de hielos de metano, que llevan a la formación de otros compuestos como acetileno, eteno, etano,... en los cuales la relación C/H ha variado. Además de estos compuestos se forma también un residuo carbonoso (refractario) que es estable a temperatura ambiente y cuya composición química no es bien conocida. Por último, el aumento de la temperatura de sublimación es también una consecuencia de la irradiación, aunque la magnitud del aumento depende de la mezcla original y de la irradiación sufrida. Existen moléculas que llegan a variar su temperatura de sublimación en decenas de grados. Para el caso de moléculas carbonadas se forman especies por irradiación que son estables a temperatura ambiente. Con todo ello se muestra que los experimentos de laboratorio pueden ayudarnos a comprender la formación, destrucción y variación de las propiedades físicas de los hielos de interés astrofísico con la irradiación.

Satorre, M. A.

452

Delineation of capture zones for municipal wells in fractured dolomite, Sturgeon Bay, Wisconsin, USA  

NASA Astrophysics Data System (ADS)

A wellhead protection study for the city of Sturgeon Bay, Wisconsin, USA, demonstrates the necessity of combining detailed hydrostratigraphic analysis with groundwater modeling to delineate zones of contribution for municipal wells in a fractured dolomite aquifer. A numerical model (MODFLOW) was combined with a particle tracking code (MODPATH) to simulate the regional groundwater system and to delineate capture zones for municipal wells. The hydrostratigraphic model included vertical and horizontal fractures and high-permeability zones. Correlating stratigraphic interpretations with field data such as geophysical logs, packer tests, and fracture mapping resulted in the construction of a numerical model with five high-permeability zones related to bedding planes or facies changes. These zones serve as major conduits for horizontal groundwater flow. Dipping fracture zones were simulated as thin high-permeability layers. The locations of exposed bedrock and surficial karst features were used to identify areas of enhanced recharge. Model results show the vulnerability of the municipal wells to pollution. Capture zones for the wells extend several kilometers north and south from the city. Travel times from recharge areas to all wells were generally less than one year. The high seasonal variability of recharge in the study area made the use of a transient model necessary. Résumé. Une étude pour la protection d'un champ captant pour la ville de Sturgeon Bay (Wisconsin, Etats-Unis) montre qu'il est nécessaire de combiner une analyse hydrostratigraphique détaillée avec une modélisation de la nappe pour définir les zones de contribution aux puits captés pour l'alimentation en potable (AEP) dans un aquifère dolomitique fracturé. Un modèle numérique (MODFLOW) a été combiné avec un code de suivi de particules (MODPATH) pour simuler le système aquifère régional et pour délimiter les zones de prélèvements concernées par les puits de l'AEP. Le modèle hydrostratigraphique comporte des fractures verticales et horizontales et des zones à forte perméabilité. Les interprétations stratigraphiques ont été corrélées avec les données de terrain telles que les logs géophysiques, les tests entre packers et la cartographie des fractures, de manière à construire un modèle numérique avec cinq zones à forte perméabilité liées à des plans de stratification ou à des variations de faciès. Ces zones constituent des conduits majeurs de l'écoulement horizontal des eaux souterraines. Les zones de fractures qui plongent ont été simulées comme des couches minces à forte perméabilité. La localisation des roches affleurantes et les phénomènes karstiques de surface ont été utilisés pour identifier les secteurs de recharge plus importante. Les résultats du modèle montrent la vulnérabilité des puits de l'AEP à la pollution. Les zones d'alimentation des puits s'étendent à plusieurs kilomètres au nord et au sud de la ville. Les temps de parcours depuis les zones de recharge vers tous les puits sont en général inférieurs à un an. La forte variabilité saisonnière de la recharge dans la région étudiée a rendu nécessaire l'utilisation d'un modèle en régime transitoire. Resumen. Se ha elaborado un estudio de perímetros de protección en la ciudad de Sturgeon Bay (Wisconsin, Estados Unidos) que demuestra la necesidad de combinar análisis detallados hidroestratigráficos con modelos numéricos para delimitar las zonas que contribuyen a los pozos de producción municipal en un acuífero de dolomitas fracturadas. Se combinó un modelo numérico (MODFLOW) con un código de seguimiento de partículas (MODPATH) para simular el sistema regional de aguas subterráneas y para delimitar las áreas de captura de los pozos municipales. El modelo hidroestratigráfico incluía fracturas horizontales y verticales y zonas de alta permeabilidad. Mediante correlación de las interpretaciones estratigráficas con diversos datos de campo, tales como perfiles geofísicos, ensayos con obturadores y identificación de

Rayne, Todd; Bradbury, Kenneth; Muldoon, Maureen

2001-09-01

453

'Everybody knows', but the rest of the world: the case of a caterpillar-borne reproductive loss syndrome in dromedary camels observed by Sahrawi pastoralists of Western Sahara  

PubMed Central

Background The traditional knowledge of local communities throughout the world is a valuable source of novel ideas and information to science. In this study, the ethnoveterinary knowledge of Sahrawi pastoralists of Western Sahara has been used in order to put forward a scientific hypothesis regarding the competitive interactions between camels and caterpillars in the Sahara ecosystem. Methods Between 2005 and 2009, 44 semi-structured interviews were conducted with Sahrawi pastoralists in the territories administered by the Sahrawi Arab Democratic Republic, Western Sahara, using a snow-ball sampling design. Results Sahrawi pastoralists reported the existence of a caterpillar-borne reproductive loss syndrome, known locally as duda, affecting their camels. On the basis of Sahrawi knowledge about duda and of a thorough literature review, we built the hypothesis that: 1) caterpillars of the family Lasiocampidae (genera Lasiocampa, Psilogaster, or Streblote) have sudden and rare outbreaks on Acacia treetops in the Western Sahara ecosystem after heavy rainfall; 2) during these outbreaks, camels ingest the caterpillars while browsing; 3) as a consequence of this ingestion, pregnant camels have sudden abortions or give birth to weaklings. This hypothesis was supported by inductive reasoning built on circumstantiated evidence and analogical reasoning with similar syndromes reported in mares in the United States and Australia. Conclusions The possible existence of a caterpillar-borne reproductive loss syndrome among camels has been reported for the first time, suggesting that such syndromes might be more widespread than what is currently known. Further research is warranted to validate the reported hypothesis. Finally, the importance of studying folk livestock diseases is reinforced in light of its usefulness in revealing as yet unknown biological phenomena that would deserve further investigation. Resumen ‘Todos lo saben’, menos el resto del mundo: el caso de un síndrome de pérdida reproductiva en dromedarios transmitido por orugas y observado por pastores nómadas saharauis del Sáhara Occidental. Antecedentes Los conocimientos tradicionales de las comunidades locales de todo el mundo son una valiosa fuente de nuevas ideas e información para la ciencia. En este estudio, se utilizaron los conocimientos de etnoveterinaria de pastores saharauis del Sáhara Occidental con el fin de proponer una hipótesis científica sobre las interacciones competitivas entre los camellos y las orugas en el ecosistema del Sáhara. Métodos Entre los años 2005 y 2009, se realizaron 44 entrevistas semi-estructuradas a los pastores saharauis en los territorios administrados por la República Árabe Saharaui Democrática, Sáhara Occidental, mediante un diseño de muestreo por bola de nieve. Resultados Los pastores nómadas saharauis describieron un síndrome reproductivo transmitido por orugas, llamado duda, entre sus camellas. Sobre la base de los conocimientos saharauis sobre el duda y una revisión literaria exhaustiva, se propuso la siguiente hipótesis: 1) brotes esporádico de orugas de la familia Lasiocampidae (géneros Lasiocampa, Psilogaster o Streblote) en árboles de Acacia se pueden presentar después de fuertes lluvias en el ecosistema del Sáhara Occidental; 2) durante estos brotes, los camellos ingieren las orugas durante el pastoreo; 3) como consecuencia de esta ingestión, se producen abortos repentinos o partos de crías debilitadas. Apoyamos esta hipótesis mediante razonamiento inductivo basado en evidencia circunstancial y razonamiento analógico con síndromes similares en yeguas de los Estados Unidos y Australia. Conclusiones Este es el primer reporte de la posible existencia de un síndrome de pérdida reproductiva en camellos, transmitido por orugas. Se insinúa que estos síndromes son más comunes que lo que actualmente se conoce. Se sugieren investigaciones adicionales p

2013-01-01

454

Monitoring artificially stimulated fluid movement in the Cretaceous Dakota aquifer, western Kansas  

NASA Astrophysics Data System (ADS)

Aquifer properties can be evaluated by monitoring artificially stimulated fluid movements between wells, if the fluid is heated. Changes in the temperature profile recorded in observation wells indicate the flow path of the heated fluid, which in effect acts as a tracer. A fluid-flow experiment in the Cretaceous Dakota Formation at the Hodgeman County site, west-central Kansas, demonstrated the advantage of using the distributed optical-fiber temperature sensing method for monitoring transient temperature conditions in this hydrological application. The fluid flow in the aquifer was increased by producing water from a pumping well and injecting heated water in an injection well 13 m (43 ft) distant from the pumping well. The time-temperature series data obtained and compared with results from previous pumping tests point to interwell heterogeneity of the aquifer and to a zone in the sandstone aquifer of high hydraulic conductivity. However, the experiment would have allowed further clarification of aquifer heterogeneity and thermal properties if at least one observation well had been present between the injection and production wells. Résumé. Les caractéristiques d'un aquifère peuvent être évaluées en effectuant un suivi des mouvements du fluide stimulés artificiellement entre des puits, si le fluide est chauffé. Les variations de profils de température enregistrés dans les puits d'observation donnent des informations sur les directions d'écoulement du fluide chauffé, qui en fait se comporte comme un traceur. Réalisée dans la formation crétacée de Dakota, sur le site du Comté de Hodgeman (centre-ouest du Kansas), une expérience a démontré l'intérêt d'utiliser la méthode de détection distribuée de température par fibres optiques pour suivre les variations de température dans cette application hydrologique. L'écoulement du fluide dans l'aquifère a été favorisé en extrayant de l'eau par pompage et en injectant de l'eau chaude dans un puits d'injection distant de 13 m du puits de pompage. La chronique de température obtenue et comparée aux résultats d'essais de pompage précédents fait apparaître l'hétérogénéité de l'aquifère entre les puits et l'existence d'une zone de forte conductivité hydraulique dans l'aquifère de grès. Toutefois, l'expérience aurait fourni des éclaircissements supplémentaires sur l'hétérogénéité de l'aquifère et sur ses propriétés thermiques si au moins un puits d'observation avait été placé entre le puits d'injection et le puits de pompage. Resumen. Se puede evaluar las propiedades de un acuífero mediante la observación del movimiento de un fluido, calentado artificialmente, entre pozos. Los cambios registrados en el perfil de temperatura de los pozos de observación indican la trayectoria del fluido calentado, el cual actúa como un trazador. Un experimento de este tipo que se realizó en la formación cretácica de Dakota, en el condado de Hodgeman (porción occidental del centro de Kansas, Estados Unidos de América), demostró la ventaja de utilizar el método del sensor de temperatura con fibra óptica distribuída para medir condiciones transitorias de temperatura en esta aplicación hidrológica. El flujo del fluido en el acuífero aumentó con el bombeo de un pozo y la inyección de agua caliente en otro sondeo, que distaba 13 m (43 pies) del primero. Las series de temperatura obtenidas y comparadas con resultados de ensayos de bombeo previos resaltan la heterogeneidad del acuífero entre ambos pozos, así como la existencia de una zona de elevada conductividad hidráulica en el acuífero de la arenisca. Sin embargo, el experimento habría proporcionado más información sobre la heterogeneidad de la formación y sus propiedades termales si se hubiera dispuesto al menos de un punto de observación entre los pozos de inyección y bombeo.

Macfarlane, Allen; Förster, Andrea; Merriam, Daniel; Schrötter, Jörg; Healey, John

2002-10-01

455

Evolution of potentially eroding events along the northern coast of the Iberian Peninsula  

NASA Astrophysics Data System (ADS)

The anthropogenic global warming is expected to result in a rise in sea-level, accompanied by changes in extreme climate events, such as the frequency and intensity of storms. Such scenario would result in an acceleration of coastal erosion. The aim of the present study is to assess the temporal evolution of potentially eroding events along the northern coast of the Iberian Peninsula during the second half of the 20th century, and to investigate changes in forcing processes such as the frequency and magnitude of storm surges and high wave events. To characterize the potentially eroding events, the total elevation of the water level was selected, being calculated as the sum of the contributions of the average water level, wave run up and the storm surges. Potentially eroding events were identified and quantified following a two-step procedure. Through the first step the potential flood induced by a given storm was estimated by simulating its effects on a theoretical beach profile (intermediate) using an empirical parameterization for extreme run-up approach. The second step consisted on characterizing the maximum storm surge registered during a storm. Those parameters were calculated from hindcasted data (storm surge, wave heights and period, wind speed and direction), retrieved from the SIMAR-44 database (Puertos del Estado), and validated against actual tide gauge measurements and buoy data (RedMar and RedExt networks). Analyses of total water levels showed a long term increase since 1958, resulting from the increase of mean sea level; conversely, a reduction of the frequency and the intensity of the storm events were deduced from the analysis of meteorological records. Since the impact of the storms on macro- and meso- tidal coast closely depend on the tides, a storm impact index was computed taking into account the storm surge magnitude, the wave heights and time duration during which a predefined threshold was exceeded by the sea level. The results are consistent with the analysis of the shoreline evolution on a specific sector of Cantabria (Oyambre) through the comparison of aerial photographs taken between 1957 and 2005. From the late 50´s to late 70’s, the shoreline significantly retreated, in correspondence with the period of maximum storm activity. Conversely, shoreline retreat slowed down during the late 1980s and 1990s while storm activity considerably decreased. Thus long-term coastal erosion, due to the occurrences of high water levels embedded into a long trend term of sea level rise, has been balanced by the reduction of the frequency and intensity of the Atlantic storms. Since relative sea-level will continue rising in the future, most of the coastal morphologies will probably be more frequently reached by the sea, increasing the flooding risk in low-lying sectors and promoting landslides along the cliffs.

Rasilla Álvarez, D.; García Codrón, J. C.

2009-09-01

456

Measurement and evaluation of national family planning programs.  

PubMed

RESUMEN: En los últimos quince años diez paises han inaugurado programas nacionales de planeamiento familiar: India, Pakistán, Corea del Sur, Taiwan, Turquía, Malasia, Ceilán, Túez, la República Arabe Unida, y Marruecos. Otros paises, incluyendo Tailandia, Hong Kong, Singapur, Kenya, Barbados, Trinidad y los Estados Unidos, apoyan y/o estimulan actividades de planeamiento familiar. En la mayor parte de los casos la razón fundamental del programa ha sido que si la tasa de crecimiento poblacional disminuyera, aumentaría la tasa de crecimiento económico.Las metas de largo alcance, expresadas típicamente en términos de reducir las tasa.de de natalidad o de crecimiento, tienen su ejemplo en el propósito de Pakistán de reducir su tasa de crecimiento a 26 para 1970; el de Corea de reducir su tasa de natalidad a 20 para 1971; y el de India de reducir su tasa de natalidad a 25 para 1973.Los objectivos intermedios, que cubren diversos aspectos del pro grama, incluyen metas específicas para un determinado mes a año, considerando personal, la adquisición de anticonceptivos, y el número de usarios por método. Las metas específicas anuales de aceptantes de dispositivos intrauterinos (IUD), para Taiwán, Corea, Túnez, Pakistán e India, son comunes, tanto por la naturaleza del artefacto, como por la facilidad de medición de los que continúan utilizándolos. El programa de evaluación en Taiwán, que trata de medir por diversos medios los efectos inmediatos, mediatos y de largo plazo del programa de planeamiento familiar sirve de modelo. El propósito de la evaiuación de un programa de planeamiento familiar es contribuir a la efectividad y eficiencia del programa, midiendo y analizando su progreso. Las áreas a medir pueden ser clasificadas como- (1) conocimiento acerca de; (2) actitudes hacia; (3) práctica de control de natalidad; y (4) nivel de fecundidad.Un buen sistema de evaluación debería incluir: A. Un buen conjunto de estadísticas de servicio presentadas en formularios estandarizados, en las siguienies formas: 1. Informes nensuales por áreas administrativas, sobre los actuales servicios de planeamiento familiar proporcionados en la actualidad, de carácter permanente o de larga duración (al presente, esterilización y IUD de acuerdo a las siguientes características del receptor: residencia, edad, paridad (número de hijos vivos por sexo), y donde se enteró del programa, si es posible "clase";(probablemente educación de la madre, pero posiblemente ocupación del esposo, ingreso, o equivalente); prácticas anticonceptivas anteriores; intervalo; y deseo de tener más hijos. En un programa grande estos datos pueden obtenerse en base a una muestra. 2. Informes mensuales sobre la distribución de suministros anticonceptivos (condones, píldoras, sustancias efervescentes, etc.), los primeros suministros deben ir acompañados de un registro de las características del recipiente, como anteriormente; los suministros subsecuentes se regietrarán sólo en volumen bruto. Esto también se aplicará al ritmo, donde éste método se enseñe a un número considerable de mujeres. 3. Informes regulares sobre las actividades de planeamiento familiar de médicos privados, como una estimación del efecto catalítico del programa del gobierno sobre ci sector privado. 4. Datos generates mensuales, ppr áreas admirtistrativas importantes, sabre: visitas domiciliarias, reuniones, cuñas radiates y televisadas, avisos en los periódicos y personal que trabaja. 5. Para propósitos de seguimiento una entrevi eta de campo cada 6 a 12 meses a cada N mujer de las listas para (1) y (2) arriba, en un total de 300 o 400, para conocer las tasas de continuación y las razones de abandono (ej: desea otro hijo, insatisfecha can ci método, otras). Las mue.stras podrían ser de 300 cada una, con una supuesta experiencia de 6, 12, 18 y 24 meses. B. Un buen conjunto de datos sobre costa (datos sobre cotos actulaes atribuíbles directamente al programa de planeamiento familiar) fraccionados par áreas principales y cinco a seis

Mauldin, W P

1967-03-01

457

Physical activity and overweight among adolescents on the Texas-Mexico border  

PubMed Central

Objective To investigate differences in associations between physical activity and overweight for students in two adjacent areas on the border between Mexico and the United States of America: students in the city of Matamoros, Mexico, and Mexican-American students in the Lower Rio Grande Valley (LRGV) area of southern Texas. Since the extremely high prevalence of overweight among Mexican-American adolescents is well-recognized, we wanted to determine whether overweight has become a problem among Mexican adolescents. Methods Students from 6 schools (n = 669), representing 12% of the ninth-grade students in Matamoros during 2002-2003, and students from 13 high schools (n = 4 736), representing 22% of the ninth-grade students in the LRGV during 2000-2001, completed questionnaires. Polytomous logistic regression was performed to estimate the risk of being at risk of overweight (?85th percentile to <95th percentile of body mass index (BMI) for age and sex) and the risk of being overweight (?95th percentile of BMI-for-age and sex) versus normal weight associated with measures of physical activity. For simplicity normal weight includes underweight. Results A higher percentage of adolescents in the LRGV were at risk of overweight (17.2%) in comparison with adolescents from Matamoros (14.8%). The percentages of LRGV and Matamoros adolescents who were overweight were identical (16.9%). LRGV adolescent boys (OR = 0.87, 95% CI = 0.77-0.98) who participated in team sports were less likely to be at or above the 85th percentile of BMI-for-age and sex. Although of borderline significance, Matamoros and LRGV adolescent boys who participated in physical education classes were less likely to be at risk of overweight. Neither in Matamoros nor LRGV students were any of the various physical activity categories or levels associated with being at risk of overweight or being overweight. Conclusions Nearly one-third of the students in both Matamoros and the LRGV are at risk of overweight and are overweight. Implementation of interventions on healthful dietary choices and participation in physical education classes and sports teams are essential for reducing the extremely high prevalence of overweight among students on both sides of the Texas/Mexico border. ABSTRACT. Spanish. Objetivo: Investigar si hay diferencias en las asociaciones entre la actividad física y el sobrepeso observadas en estudiantes de dos zonas colindantes en la frontera mexicanoestadounidense: estudiantes de la ciudad de Matamoros, México, y estudiantes mexicanoestadounidenses del valle a lo largo de la desembocadura del Río Bravo (VRB) en la parte sur del estado de Texas. Dada la consabida prevalencia extremadamente alta de sobrepeso en adolescentes mexicanoestadounidenses, los autores queríamos determinar si el sobrepeso también se ha convertido en un problema entre adolescentes mexicanos. Métodos: Estudiantes de 6 escuelas (n = 653), que comprenden 11% de los estudiantes de noveno grado en Matamoros durante 2002–2003, y estudiantes de 13 bachilleratos (n = 4 736), que comprenden 22% de los estudiantes de noveno grado del VRB durante 2000–2001, contestaron cuestionarios. Se llevó a cabo una regresión logística politómica a fin de calcular el riesgo de estar en riesgo de tener sobrepeso (?85.° percentil a <95.° percentil de índice de masa corporal (IMC) para la edad y el sexo) y el riesgo de tener sobrepeso (?95.° percentil de índice de masa corporal (IMC) para la edad y el sexo), frente a un peso normal, que se asociaban con distintos grados de actividad física. En aras de la sencillez, en la clasificación del peso normal también se abarcó la insuficiencia de peso. Resultados: Un mayor porcentaje de adolescentes estaban en riesgo de sufrir sobrepeso en el VRB (17%) que en Matamoros (15%). Los porcentajes de adolescentes de VRB y de Matamoros que tenían sobrepeso fueron idénticos (17%). Los varones adolescentes en el VRB (raz&

Perez, Adriana; Reininger, Belinda M.; Flores, Maria Isabel Aguirre; Sanderson, Maureen; Roberts, Robert E.

2006-01-01

458

Biotransformation of pesticides in saturated-zone materials  

NASA Astrophysics Data System (ADS)

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

Hoyle, Blythe L.; Arthur, Ellen L.

459

Simulation of regional-scale groundwater flow in the Azul River basin, Buenos Aires Province, Argentina  

NASA Astrophysics Data System (ADS)

A three-dimensional modular model (MODFLOW) was used to simulate groundwater flow in the Azul River basin, Buenos Aires Province, Argentina, in order to assess the correctness of the conceptual model of the hydrogeological system. Simulated heads satisfactorily match observed heads in the regional water-table aquifer. Model results indicate that: (1) groundwater recharge is not uniform throughout the region but is best represented by three recharge rates, decreasing downgradient, similar to the distribution of soils and geomorphological characteristics; and (2) evapotranspiration rates are larger than previous estimates, which were made by using the Thornthwaite-Mather method. Evapotranspiration rates estimated by MODFLOW agree with results of independent studies of the region. Model results closely match historical surface-flow records, thereby suggesting that the model description of the aquifer-river relationship is correct. Résumé Un modèle modulaire tridimensionnel (MODFLOW) a été utilisé pour simuler les écoulements souterrains dans le bassin de la rivière Azul (Province de Buenos Aires, Argentine), dans le but d'évaluer la justesse du modèle conceptuel du système hydrogéologique. La piézométrie simulée s'ajuste de façon satisfaisante à celle observée pour l'ensemble de la nappe. Les résultats du modèle indiquent que: (1) la recharge de la nappe n'est pas uniforme sur toute la région, mais qu'elle est mieux approchée par trois valeurs différentes, décroissant vers l'aval-gradient, en suivant la même distribution que les sols et les caractéristiques géomorphologiques et (2) l'évapotranspiration est nettement plus importante que prévu initialement à partir de la méthode de Thornthwaite-Mather. Les valeurs d'évapotranspiration fournies par MODFLOW concordent bien avec les résultats d'autres études portant sur la région. Les résultats du modèle reproduisent convenablement les chroniques de débit des écoulements de surface, suggérant ainsi que la description par le modèle des relations rivière-nappe est correcte. Resumen Se ha utilizado el modelo MODFLOW, del Servicio Geológico de los Estados Unidos, para simular el flujo de agua subterránea en la cuenca del arroyo del Azul, Provincia de Buenos Aires, Argentina, con el objeto de evaluar el modelo hidrogeológico conceptual. Los niveles hidráulicos simulados ajustan satisfactoriamente con los niveles observados. Los resultados de la simulación indican que: (1) la recarga no es uniforme, sino que puede caracterizarse con tres zonas en las que sus valores decrecen en la medida en que decrece la pendiente, que guarda similitud con la distribución de suelos y características geomorfológicas y (2) la evapotranspiración sería mayor que la estimada en estudios previos, en los que se utilizó el método