oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 82 )

2018 ( 97 )

2017 ( 113 )

2016 ( 161 )

Custom range...

Search Results: 1 - 10 of 54702 matches for " David;Lamas-Padilla "
All listed articles are free for downloading (OA Articles)
Page 1 /54702
Display every page Item
Probable encefalitis por virus del oeste del Nilo
Díaz-Olachea, Carlos Gabriel;de la Maza-Flores, Manuel;Dondis-Cama?o, David;Lamas-Padilla, Biorica Elena;
Archivos de neurociencias (México, D.F.) , 2005,
Abstract: the case of a patient with a clinically suspected west nile virus encephalitis is described. the patient is a 70 year male with a 7 day fever who developed confusión, speaking difficulties and generalized muscular weakness. since the patient' s condition improved, he was discharged from this hospital seven days after admission. twenty days later, west nile virus igg antibodies were found high through elisa method. the case was retrospectively reviewed and it was classified as possible west nile virus encephalitis. the results if igg antibodies for west nile virus obtained by the elisa method, as well as the clinical features of the patient are consistent with west nile virus infection according to the cdc criteria.
A geometric approach to invariant sets for dynamical systems
David Medina,Pablo Padilla
Electronic Journal of Differential Equations , 2010,
Abstract: In this article, we present a geometric framework to study invariant sets of dynamical systems associated with differential equations. This framework is based on properties of invariant sets for an area functional. We obtain existence results for heteroclinic and periodic orbits. We also implement this approach numerically by means of the steepest descent method.
Procesos electorales en el Estado de México 1981-2006
David Padilla Macayo
Espacios Públicos , 2007,
Abstract: El presente reporte de investigación pretende estudiar el comportamiento electoral a través de un análisis estadístico de las elecciones de gobernador, diputados locales y presidentes municipales. Además de los resultados de elecciones de presidente de la república en el Estado de México, la finalidad es llegar a las generalidades estadísticas que permitan tener conclusiones preliminares sobre los partidos políticos en la entidad.
Partido Acción Nacional, Estado de México: las variables de la profesionalización
David Macayo Padilla
Espacios Públicos , 2008,
Abstract: El artículo busca comprobar que los elementos como: competitividad electoral, cargos de elección, financiamiento y burocracia partidista son variables que conducen el Partido Acción Nacional en el Estado de México a la profesionalización, sin que sean elementos exclusivos o negativos de este partido, sino como parte de un proceso inevitable para todos los partidos políticos en los ámbitos local y nacional. Inicialmente, la intención era incluir, como otra de las variables la gestión, pero el acceso a esta información es restringida ya que son informes que los diputados del PAN hacen al Comité Directivo Estatal y no están disponibles al público.
Elecciones 2009: realineamiento
David Padilla Macayo
Espacios Públicos , 2011,
Abstract: En 2006, el Partido Revolucionario Institucional (pri) se encontraba en el peor momento de su historia al ganar sólo 65 de los 300 distritos en las elecciones de diputados. Para el siete de julio de 2009, el pri había ganado 184 distritos y, así, pasó a su mejor momento histórico (al menos desde 1988), es decir, sumó 119 triunfos de una elección a otra. Desconocemos a qué partidos les ganó y qué tipos de distritos eran; saberlo resulta importante porque proporciona nuevos ángulos a teorías muy socorridas para explicar el voto de los partidos políticos en México. Esta investigación muestra el desalineamiento en las elecciones de diputados de mayoría de 2009 en dos partidos (pan y prd), y el alineamiento del pri, teniendo como base la clasificación que realiza el Instituto Federal Electoral (ife) de los 300 distritos en urbanos, rurales y mixtos.
Ab-initio study of BaTiO3 surfaces
J. Padilla,David Vanderbilt
Physics , 1997, DOI: 10.1103/PhysRevB.56.1625
Abstract: We have carried out first-principles total-energy calculations of (001) surfaces of the tetragonal and cubic phases of BaTiO3. Both BaO-terminated (type I) and TiO2-terminated (type II) surfaces are considered, and the atomic configurations have been fully relaxed. We found no deep-gap surface states for any of the surfaces, in agreement with previous theoretical studies. However, the gap is reduced for the type-II surface, especially in the cubic phase. The surface relaxation energies are found to be substantial, i.e., many times larger than the bulk ferroelectric well depth. Nevertheless, the influence of the surface upon the ferroelectric order parameter is modest; we find only a small enhancement of the ferroelectricity near the surface.
Ab-initio study of SrTiO3 surfaces
J. Padilla,David Vanderbilt
Physics , 1998, DOI: 10.1016/S0039-6028(98)00670-0
Abstract: We present first-principles total-energy calculations of (001) surfaces of SrTiO3. Both SrO-terminated and TiO2-terminated surfaces are considered, and the results are compared with previous calculations for BaTiO3 surfaces. The major differences are in the details of the relaxed surface structures. Our calculations argue against the existence of a large ferroelectric relaxation in the surface layer, as had been previously proposed. We do find some indications of a weak surface ferroelectric instability, but so weak as to be easily destroyed by thermal fluctuations except perhaps at quite low temperatures. We also compute surface relaxation energies and surface electronic band structures, obtaining results that are generally similar to those for BaTiO3.
Empirical Bayes methods corrected for small numbers of tests
Marta Padilla,David R. Bickel
Mathematics , 2010, DOI: 10.1515/1544-6115.1807
Abstract: Histogram-based empirical Bayes methods developed for analyzing data for large numbers of genes, SNPs, or other biological features tend to have large biases when applied to data with a smaller number of features such as genes with expression measured conventionally, proteins, and metabolites. To analyze such small-scale and medium-scale data in an empirical Bayes framework, we introduce corrections of maximum likelihood estimators (MLE) of the local false discovery rate (LFDR). In this context, the MLE estimates the LFDR, which is a posterior probability of null hypothesis truth, by estimating the prior distribution. The corrections lie in excluding each feature when estimating one or more parameters on which the prior depends. An application of the new estimators and previous estimators to protein abundance data illustrates how different estimators lead to very different conclusions about which proteins are affected by cancer. The estimators are compared using simulated data of two different numbers of features, two different detectability levels, and all possible numbers of affected features. The simulations show that some of the corrected MLEs substantially reduce a negative bias of the MLE. (The best-performing corrected MLE was derived from the minimum description length principle.) However, even the corrected MLEs have strong negative biases when the proportion of features that are unaffected is greater than 90%. Therefore, since the number of affected features is unknown in the case of real data, we recommend an optimally weighted combination of the best of the corrected MLEs with a conservative estimator that has weaker parametric assumptions.
Rea??es do algodoeiro CNPA-ITA 90 ao cloreto de mepiquat
LAMAS, FERNANDO MENDES;ATHAYDE, MANOEL LUIZ FERREIRA;BANZATTO, DAVID ARIOVALDO;
Pesquisa Agropecuária Brasileira , 2000, DOI: 10.1590/S0100-204X2000000300005
Abstract: the effects of different doses of mepiquat chloride on cotton (gossypium hirsutum l.) plants, cultivar cnpa-ita 90, during the 1993/94 and 1994/95 growing seasons were evaluated at itamarati farm, ponta por?, ms, brazil. the doses were split in three application dates and the experimental design was in randomized blocks, with five treatments replicated four times. the treatments were as follows: 1) unsprayed control; 2) 12.5+12.5+25.0 (50.0); 3) 25.0+25.0+25.0 (75.0); 4) 0.0+50.0+50.0 (100.0); and 5) 12.5+62.5+50.0 (125.0) g ha-1 of mepiquat chloride. the spraying was done at 34, 47 and 62 days after emergence (dae) in 1993/94 and at 42, 60 and 73 dae in 1994/95, when the plants were at the average hight of 51, 84 and 93 cm and 61, 79 and 97 cm, respectively. increasing dose of mepiquat chloride caused decreasing in plant height; leaf stems and total above ground dry matter; number of nodes and branching; the branches length; the number of damaged fruits; the total number of bolls and the number of fully opened bolls.
Rea es do algodoeiro CNPA-ITA 90 ao cloreto de mepiquat
LAMAS FERNANDO MENDES,ATHAYDE MANOEL LUIZ FERREIRA,BANZATTO DAVID ARIOVALDO
Pesquisa Agropecuária Brasileira , 2000,
Abstract: Com o objetivo de avaliar os efeitos de diferentes doses de cloreto de mepiquat aplicadas parceladamente no algodoeiro (Gossypium hirsutum L.) cv. CNPA-ITA 90, dois experimentos foram conduzidos durante os anos agrícolas de 1993/94 e 1994/95, na Fazenda Itamarati, Ponta Por , MS. As doses estudadas foram: 1) 0,0; 2) 12,5+12,5+25,0 (50,0); 3) 25,0+25,0+25,0 (75,0); 4) 0,0+ 50,0+50,0 (100,0) e 5) 12,5+62,5+50,0 (125,0) g ha-1 de cloreto de mepiquat. O delineamento experimental utilizado foi o de blocos casualizados, com quatro repeti es. As aplica es foram efetuadas aos 34, 47 e 62 dias após a emergência (DAE), em 1993/94, e aos 42, 60 e 73 DAE no ano de 1994/95, quando as plantas apresentavam altura média de 51, 84 e 93 cm e 61, 79 e 97 cm, respectivamente. Com o aumento da dose de cloreto de mepiquat, verificou-se redu o da altura de plantas, da matéria seca foliar, do caule e do total da parte vegetativa, do número de nós, de ramos, do comprimento de ramos, do número de frutos danificados e do número de ma s, e aumento do número de capulhos totalmente abertos.
Page 1 /54702
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.