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Search Results: 1 - 10 of 49817 matches for " Hugo Alberto González-Robles "
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Frecuencia de infección por VIH/sida en usuarios de preservativo Frequency of infection by HIV/ AIDS preservative users
Bertha Alicia Olmedo-Buenrostro,Hugo Alberto González-Robles,Ivan Delgado-Enciso,Ana Bertha Mora-Brambila
Revista Cubana de Investigaciones Biom??dicas , 2012,
Abstract: El propósito fundamental del presente trabajo fue identificar la frecuencia de pacientes atendidos en el servicio de Medicina Interna del Hospital General de Zona No. 1 IMSS-Colima que habiendo utilizado el preservativo en todas sus coitos estuvieran infectados con VIH/sida descartando otra vía de transmisión; considerando su edad, sexo, estado civil, lugar de residencia, número de parejas sexuales y preferencia sexual. El objetivo de este trabajo fue identificar la frecuencia de pacientes infectados por VIH/sida en usuarios de preservativo. Es un estudio descriptivo transversal. Se estudió una muestra de 61 pacientes VIH/sida, durante los meses agosto-octubre, que acudieron a sus citas de control al servicio de medicina interna del Instituto Mexicano del Seguro Social de la ciudad de Colima a quienes se les invitó a participar garantizándoles el anonimato, se obtuvieron medidas de tendencia central. De los 61 pacientes con VIH/sida descartando otra vía de transmisión, 12 (20 %) refirieron haber utilizado en todas sus coitos el preservativo, de los cuales 3 (25 %) eran mujeres y 9 (75 %) hombres. El rango de 20 a 39 a os de edad y los solteros fueron los más afectados. Número de parejas sexuales: 8 (67 %) varias parejas y 4 (33 %) una pareja. Preferencia sexual: 3 (25 %) heterosexuales, 7 (58 %) homosexuales y 2 (17 %) bisexuales. Se concluye que el preservativo no es del todo efectivo, para la protección de enfermedades de transmisión sexual como el VIH/SIDA. The primary purpose of this study was to identify the frequency of patients treated at the Internal Medicine Service of General Hospital Zone No. 1 IMSS, Colima having used preservative in all sexual intercourse were infected with HIV / AIDS discarding other means of transmission, considering his age, sex, marital status, place of residence, number of sexual partners and sexual preference. The aim of this study was to identify the frequency of patients infected with HIV / AIDS in preservative users. It is a cross-sectional study. The sample consisted of 61 patients with HIV / AIDS during the months from August to October, which came to control appointments to the service of internal medicine of the Instituto Mexicano del Seguro Social in Colima city who were invited to participate by guaranteeing anonymity, we obtained measures of central tendency. Of the 61 patients with HIV / AIDS discarding other means of transmission, 12 (20%) reported having used preservatives all their intercourse, of whom 3 (25%) were female and 9 (75%) men. The range of 20 to 39 years old and single were the most affected.
Determinantes psicolingüísticos da compreens?o de leitura em inglês como língua estrangeira
Vivaldo-Lima, Javier;López-Olivas, Miguel;González-Robles, Rosa Obdulia;
Psicologia Escolar e Educacional , 2003, DOI: 10.1590/S1413-85572003000100003
Abstract: the purpose of this study was to analyze the contribution of linguistic and psychological variables in the explanation of the variance associated with reading comprehension in english (l2). two hundred and eighty mexican university students participated in the study. the variables analyzed within the linguistic dimension were: reading strategies in spanish, linguistic competence in english, and ability to perceive lexical transparency between l1 and l2. the psychological dimension evaluated the influence of the reader’s cognitive style, locus of control, and action control orientation on reading comprehension in l2. subjects were administered a battery of seven evaluation instruments. multiple regression analyses suggested a two-stage explanatory model of reading in l2. firstly, psychological variables accounted for 10.0% of the variance in reading comprehension in the first language. secondly, reading comprehension in spanish, linguistic competence in l2, and perception of lexical transparency, accounted for 35.5% of the variance in reading comprehension in english.
Sleep Deprivation Affects Working Memory in Low but Not in High Complexity for the N-Back Test  [PDF]
Guadalupe J. Terán-Pérez, Alejandra E. Ruiz-Contreras, Rosa O. González-Robles, Rosario Tarrago-Castellanos, Roberto E. Mercadillo, Anabel Jiménez-Anguiano, Javier Velázquez-Moctezuma
Neuroscience & Medicine (NM) , 2012, DOI: 10.4236/nm.2012.34047
Abstract: Sleep clearly influences learning and memory since sleep deprivation and stress impairs both cognitive processes. Working memory is an essential cognitive process and refers to a short-term holding of incoming information required to update the long-term mnemonic storage and to manipulate new elements in order to solve problems and make decisions. Nevertheless, the influence of sleep deprivation on working memory has scarcely been studied. In this study we evaluated working memory using the N-back test after increasing periods of wakefulness. Healthy young males were kept awake for 36 hours and the two N-back tasks with low (1-Back) and high (3-Back) levels of complexity were applied every 6 hours. Additionally, salivary cortisol was determined along the study. Unlike the control non-deprived participants, the sleep deprived volunteers showed a significant decrease in their efficiency to solve the 1-Back task after 24 hours of sleep deprivation. However, no differences were observed after 30 and 36 hours of sleep deprivation. Concerning the 3-Back task no differences were observed after sleep deprivation. Regarding reaction time, the deprived group manifested slower responses for the 1-Back task and for the 3-Back task after 30 hours and 36 hours of sleep deprivation, respectively. Cortisol levels presented the normal daily oscillation and no differences were observed between groups. This data suggests that sleep deprivation affects basal states of attention instead of working memory while performing simple tasks. The impact of sleep deprivation on the cognitive performance depends on the moment of day when the task is applied and the complexity of the tests used to assess these mnemonic skills.
EhADH112 Is a Bro1 Domain-Containing Protein Involved in the Entamoeba histolytica Multivesicular Bodies Pathway
Cecilia Ba uelos,Guillermina García-Rivera,Israel López-Reyes,Leobardo Mendoza,Arturo González-Robles,Silvia Herranz,Olivier Vincent,Esther Orozco
Journal of Biomedicine and Biotechnology , 2012, DOI: 10.1155/2012/657942
Abstract: EhADH112 is an Entamoeba histolytica Bro1 domain-containing protein, structurally related to mammalian ALIX and yeast BRO1, both involved in the Endosomal Sorting Complexes Required for Transport (ESCRT)-mediated multivesicular bodies (MVB) biogenesis. Here, we investigated an alternative role for EhADH112 in the MVB protein trafficking pathway by overexpressing 166 amino acids of its N-terminal Bro1 domain in trophozoites. Trophozoites displayed diminished phagocytosis rates and accumulated exogenous Bro1 at cytoplasmic vesicles which aggregated into aberrant complexes at late stages of phagocytosis, probably preventing EhADH112 function. Additionally, the existence of a putative E. histolytica ESCRT-III subunit (EhVps32) presumably interacting with EhADH112, led us to perform pull-down experiments with GST-EhVps32 and [35S]-labeled EhADH112 or EhADH112 derivatives, confirming EhVps32 binding to EhADH112 through its Bro1 domain. Our overall results define EhADH112 as a novel member of ESCRT-accessory proteins transiently present at cellular surface and endosomal compartments, probably contributing to MVB formation during phagocytosis.
Transcraneal Magnetic Stimulation Improves Sleep Parameters in Patients Affected with Imsomnia Associated to Electroencephalographic Abnormalities  [PDF]
Oscar Sánchez-Escandón, Yoaly Arana-Lechuga, Guadalupe Terán-Pérez, Enrique Esqueda-Leon, Rosa Obdulia González-Robles, ángel Ruiz-Chow, Paul Shkurovich-Bialik, Miguel ángel Collado-Corona, Javier Velázquez-Moctezuma
Neuroscience & Medicine (NM) , 2014, DOI: 10.4236/nm.2014.51010
Abstract:

Insomnia is one of the most frequently observed sleep disorders, affecting nearly 10% of the general population. It has multiple etiological factors. Recently, it has been reported that EEG abnormalities are associated with insomnia in patients previously diagnosed as idiopathic insomniacs. In addition, transcranial magnetic stimulation (TMS) has shown to be effective in the treatment of disorders characterized by neural hyper-excitability. Method: In the present study, patients with insomnia and EEG abnormalities were submitted to slow repetitive trans-cranial magnetic stimulation, for 15 minutes daily during 10 days. Polysomnographic recordings were performed before and after TMS. Results: The results indicate that the presence of EEG abnormalities significantly decreased after TMS. In addition, most of the sleep parameters showed significant improvement. Conclusions: These data support the notion that TMS is a reliable therapeutic tool for patients affected with abnormalities linked to neuronal hyper-excitability.

Implementation of the Hough Transform for Iris Detection and Segmentation  [PDF]
Francisco Javier Paulín-Martínez, Alberto Lara-Guevara, Rosa María Romero-González, Hugo Jiménez-Hernández
Advances in Molecular Imaging (AMI) , 2019, DOI: 10.4236/ami.2019.91002
Abstract: The iris is used as a reference for the study of unique biometric marks in people. The analysis of how to extract the iris characteristic information represents a fundamental challenge in image analysis, due to the implications it presents: detection of relevant information, data coding schemes, etc. For this reason, in the search for extraction of useful and characteristic information, approximations have been proposed for its analysis. In this article, it is presented a scheme to extract the relevant information based on the Hough transform. This transform helps to find primitive geometries in the irises, which are used to characterize each one of these. The results of the implementation of the algorithm of the Hough transform applied to the location and segmentation of the iris by means of its circumference are presented in the paper. Two public databases of iris images were used: UBIRIS V2 and CASIA-IrisV4, which were acquired under the same conditions and controlled environments. In the pre-processing stage the edges are found from the noise elimination in the image through the Canny detector. Subsequently, to the images of the detected edges, the Hough transform is applied to the disposition of the geometries detected.
De qué se mueren los ancianos en Espa a?
Robles González, Elena
Estudios Geográficos , 2009,
Abstract: Following the analyses of the standardized mortality rates, that allows to eliminate the effect of age structure, the impact of mortality is directly appreciated and the evolution of the main causes of death in the 80+ population in Spain between 1975 and 2007, is described. Using the Short-List of Eurostat, causes of death have been divided into 17 broad groups. The article analyzes the decline of mortality caused by the fall of circulatory diseases, mainly the cerebrovascular ones, and to a lesser extent, the respiratory diseases, ill-defined diseases and external causes. Inversely, in the remaining thirteen groups the mortality has increased over such period particularly, the neoplasms, nervous system diseases and mental disorders. Important differences by gender have been found, being neoplasms and respiratory diseases much higher in men, which would explain the greater men oldest-old mortality in Spain. Se analiza la evolución, entre 1975 y 2007, de las principales causas de muerte en la población espa ola de 80+ a os, a partir del análisis de las tasas estandarizadas de mortalidad que, al eliminar el efecto de la estructura por edad, permiten apreciar el impacto de la mortalidad. Las causas de muerte se han agrupado en 17 grandes grupos, siguiendo la Lista Abreviada de Eurostat. Se describe la caída de la mortalidad debida al descenso de las enfermedades circulatorias, (en especial las cerebrovasculares) y, en menor medida, de las respiratorias, las mal definidas y las causas externas. Por el contrario, la mortalidad en los 13 grupos restantes se ha incrementado durante el período, sobre todo la relativa a tumores, enfermedades del sistema nervioso y trastornos mentales. Se constatan importantes diferencias por género, siendo los tumores y las enfermedades respiratorias muy superiores en los hombres. Ello explicaría la mayor mortalidad masculina de la población anciana. [fr] On analise l’évolution des principales causes de mort chez la population espagnole de plus de 80 ans de 1975 à 2007, sur la base de l’analyse des taux standarisés de mortalité qui permettent aprécier l’impact de la mortalité en éliminant l’effet de la structure par age. Les causes de mort ont été groupées en 17 grands groupes suivant la liste abrégée d’Eurostat. On découvre la chute de la mortalité, due à la déscente des maladies circulatoires, en particulier les cardiovasculaires et, à une moindre échelle, des respiratoires, les mal définies et les causes externes. La mortalité chez le reste des groupes est augmenté au long de cette periode, surtout les tumeurs et les maladie
CORRELACIóN ENTRE PROPIEDADES ANATóMICAS, RESISTENCIA A FLEXIóN ESTáTICA Y ENERGíA REQUERIDA PARA EL CORTE DE LA CA?A DE AZúCAR (Saccharum officinarum L.)
González Sánchez,Hugo Alberto; Toro Betancur,Alejandro; álvarez Mejía,Fernando; Cortés Marín,Elkin Alonso;
Revista Facultad Nacional de Agronomía, Medellín , 2008,
Abstract: the microstructure, anatomical structure, bending resistance and the energy required to cut stems of three varieties of sugar cane cultivated in the valle del cauca ( colombia ), were studied in order to have useful data for the development of cutting blades. microestructural and anatomical characterization tasks were performed by optical microscopy ( om), and scanning electron microscopy (sem). the physical and mechanical properties were determined after adaptation of astm standards (which were developed for wood), while the consumption of energy during cutting was evaluated by using a modified charpy type impact pendulum. the fibers and silica particles showed different geometry and distribution in the stems of the three studied varieties, and a relation was established between the microstructure of the stems and the energy required to cut them in the modified charpy pendulum. generally speaking, cutting the internodes required higher specific energy than cutting the nodes, and the use of blades with cutting angle of 20° led to lower levels of energy consumption. also, a relation of proportionality between the effective cross-sectional area of fibers (atef) and the specific energy consumed in cutting, as well as between the flexibility coefficient and the modulus of elasticity in bending were found.
CORRELACIóN ENTRE PROPIEDADES ANATóMICAS, RESISTENCIA A FLEXIóN ESTáTICA Y ENERGíA REQUERIDA PARA EL CORTE DE LA CA A DE AZúCAR (Saccharum officinarum L.) CORRELATIONS AMONG ANATOMIC PROPERTIES, BENDING RESISTANCE AND ENERGY REQUIRED TO CUT SUGAR CANE (Saccharum officinarum L.)
Hugo Alberto González Sánchez,Alejandro Toro Betancur,Fernando álvarez Mejía,Elkin Alonso Cortés Marín
Revista Facultad Nacional de Agronomía, Medellín , 2008,
Abstract: La microestructura, estructura anatómica, la resistencia a la flexión y la energía requerida durante el corte de los tallos de tres variedades de ca a de azúcar cultivadas en el Valle del Cauca (Colombia), fueron estudiados con el propósito de adquirir información útil para el desarrollo de cuchillas para corte de esta especie. Las labores de caracterización microestructural y anatómica se apoyaron en las técnicas de microscopía óptica y electrónica de barrido. Las propiedades mecánicas se determinaron adaptando algunas normas ASTM para maderas, mientras que la energía al corte se evaluó usando un péndulo de impacto tipo Charpy modificado. En los tallos de las tres variedades estudiadas se observaron diferentes distribuciones y dimensiones geométricas de las fibras y se verificó la presencia de partículas de sílice. Se presentó en general mayor requerimiento de energía específica al corte en los entrenudos que en los nudos y un menor consumo específico de energía al corte con las cuchillas con ángulo de afilado de 20°. Se establecieron relaciones entre la microestructura de los tallos, comportamiento a la flexión y al corte, destacándose la relación proporcional entre el área transversal efectiva de fibra (ATEF) y la energía específica al corte, así como entre el coeficiente de flexibilidad y el módulo de elasticidad en flexión. The microstructure, anatomical structure, bending resistance and the energy required to cut stems of three varieties of sugar cane cultivated in the Valle del Cauca ( Colombia ), were studied in order to have useful data for the development of cutting blades. Microestructural and anatomical characterization tasks were performed by optical microscopy ( OM), and scanning electron microscopy (SEM). The physical and mechanical properties were determined after adaptation of ASTM standards (which were developed for wood), while the consumption of energy during cutting was evaluated by using a modified Charpy type impact pendulum. The fibers and silica particles showed different geometry and distribution in the stems of the three studied varieties, and a relation was established between the microstructure of the stems and the energy required to cut them in the modified Charpy pendulum. Generally speaking, cutting the internodes required higher specific energy than cutting the nodes, and the use of blades with cutting angle of 20° led to lower levels of energy consumption. Also, a relation of proportionality between the effective cross-sectional area of fibers (ATEF) and the specific energy consumed in cutting, as well as between the fl
Representaciones mediáticas socioambientales en torno al proyecto de megapuerto en Bahía Colonet
Claudia Cecilia González Olimón,óscar Alberto Pombo López,Hugo Méndez Fierros,Martha Ileana Espejel Carbajal
Culturales , 2011,
Abstract: En este artículo se identifica la valoración que se ha creado en torno a los factores antrópicos, bióticos y abióticos del proyecto de Bahía Colonet. El trabajo se hizo con base en el análisis de 409 artículos online de periódicos de la región México-Estados Unidos. Se eligió el marco epistemológico interpretativo y se emplearon métodos cuali y cuantitativos. Se concluyó que el proyecto no es sustentable porque es imperiosamente antropogénico, centrado en valores que reducen el entorno natural a un simple recurso para acumular riqueza.
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