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Procesamiento intensivo de datos en aplicaciones empotradas con restricciones de tiempo real
Fidel González Vázquez,Moisés Herrera Vázquez,Erick López González,René González Rodríguez
Revista Cubana de Ciencias Informáticas , 2011,
Abstract: Existe un número creciente de aplicaciones sobre sistemas empotrados que realizan procesamiento intensivo de datos con restricciones de tiempo real. Ejemplos destacados los encontramos en aplicaciones relacionadas con la inteligencia artificial, la robótica móvil, biomédicina, en aplicaciones aeroespaciales e incluso en las finanzas. Como en todo tema de relativa novedad existen varios intentos de dar soluciones generales pero debido a la diversidad de arquitecturas presentes en los sistemas empotrados esto ha sido imposible. Por otra parte varias de las soluciones existentes en el mercado son propietarias y de código cerrado dificultando la utilización de estás como plataformas de trabajo e investigación. En este trabajo se propone una solución de código abierto al procesamiento intensivo de datos con restricciones temporales en una plataforma empotrada basada en tecnología ARM, la cual es una de las más extendidas dentro de los sistemas empotrados. Los componentes utilizados se caracterizan por su alta reutilización y robustez. Se realizan pruebas de desempe o en tiempo real y/o calidad de servicio sobre cada uno de los componentes que conforman la solución, así como a su integración mediante dos aplicaciones de ejemplo.
Factores no Genéticos que Afectan la Producción y Composición de la Leche en un Reba?o de Pariciones de la Décima Región de los Lagos, Chile
Pérez P,Lucio??; Anrique G,René??; González V,Humberto;
Agricultura Técnica , 2007, DOI: 10.4067/S0365-28072007000100005
Abstract: a total of 1578 lactations of 493 cows were analyzed between 1990 and 2001. lactations were grouped according to calving season (autumn and spring), month of calving within season (autumn: march, april, may; spring: july, august, september), cow age, number of calvings and lactation year. accumulated production up to 305 days was considered; shorter lactations were not adjusted in order to detect environmental effects on the production period. monthly milk production was adjusted to 30 days and standardized at 4% fat content. variables evaluated were milk production, production and concentration of protein and fat, lactation length and persistency. independent variables were analyzed estimating average minimum squares. with autumn calvings, milk production, fat production and lactation persistency were 5,293 kg, 205 kg and 72.1%, respectively, being greater (p ≤ 0.05) than spring calvings (5,114 kg, 198 kg and 66.2%) with no difference in protein production. during the first half of lactation, milk production was lower with autumn calvings and the opposite was observed in the second half of lactation, indicating in both cases an underutilization of production potential of the cows for nutritional reasons. lactation yield increased with earlier calvings in both seasons (5,600 vs. 5,440 kg in march and may with autumn lactations; and 5,303 vs. 4,980 kg in july and september with spring lactations). milk protein content was greater (p ≤ 0.05) with spring lactations compared to autumn lactations (3.23 vs. 3.19%, respectively) with no differences in milk fat content (3.72 vs. 3.71%).
Factores no Genéticos que Afectan la Producción y Composición de la Leche en un Reba o de Pariciones de la Décima Región de los Lagos, Chile Non Genetic Factors Affecting Milk Production and Composition in a Dairy Herd with Two Calving Seasons in Los Lagos Region, Chile
Lucio Pérez P,René Anrique G,Humberto González V
Agricultura Técnica , 2007,
Abstract: Se analizaron 1578 lactancias de 493 vacas generadas entre 1990 y 2001. Se agruparon por época de parto (oto o, primavera), mes de parto dentro de época (oto o: marzo, abril y mayo; primavera: julio, agosto, septiembre), edad, numero del parto, a o de inicio de lactancia. Se consideró producción acumulada hasta 305 días; lactancias menores no se proyectaron para detectar efectos ambientales sobre el período de producción. La producción mensual se corrigió a 30 días y se estandarizó a 4% de materia grasa. Se evaluó producción de leche, producción y concentración de proteína y grasa, duración y persistencia de lactancia. Las variables independientes se analizaron estimando promedios mínimos cuadrados. Con partos de oto o, las producciones de leche, de grasa y la persistencia, respectivamente, 5.293 kg, 205 kg y 72,1%, fueron superiores (P ≤ 0,05) que con partos de primavera (5.114 kg, 198 kg y 66,2%), sin diferencias en producción de proteína. En la primera mitad de lactancia, la producción fue menor con partos de oto o y lo contrario ocurrió en la segunda mitad, indicando en ambos casos una subutilización del potencial productivo por razones nutricionales. La producción por lactancia aumentó con partos tempranos dentro de época (5.600 vs 5.440 kg en marzo y mayo, con lactancias de oto o; y 5.303 vs 4.980 kg en julio y septiembre, con lactancias de primavera). El contenido de proteína fue mayor (P ≤ 0,05) en lactancias de primavera que de oto o (3,23 vs 3,19%) sin diferencias en grasa láctea (3,72 vs 3,71%). A total of 1578 lactations of 493 cows were analyzed between 1990 and 2001. Lactations were grouped according to calving season (autumn and spring), month of calving within season (autumn: March, April, May; spring: July, August, September), cow age, number of calvings and lactation year. Accumulated production up to 305 days was considered; shorter lactations were not adjusted in order to detect environmental effects on the production period. Monthly milk production was adjusted to 30 days and standardized at 4% fat content. Variables evaluated were milk production, production and concentration of protein and fat, lactation length and persistency. Independent variables were analyzed estimating average minimum squares. With autumn calvings, milk production, fat production and lactation persistency were 5,293 kg, 205 kg and 72.1%, respectively, being greater (P ≤ 0.05) than spring calvings (5,114 kg, 198 kg and 66.2%) with no difference in protein production. During the first half of lactation, milk production was lower with autumn calvings and the opp
Genetic Characterization of Atypical Citrobacter freundii
Gabriela Delgado, Valeria Souza, Rosario Morales, René Cerritos, Andrea González-González, José Luis Méndez, Virginia Vázquez, Alejandro Cravioto
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0074120
Abstract: The ability of a bacterial population to survive in different niches, as well as in stressful and rapidly changing environmental conditions, depends greatly on its genetic content. To survive such fluctuating conditions, bacteria have evolved different mechanisms to modulate phenotypic variations and related strategies to produce high levels of genetic diversity. Laboratories working in microbiological diagnosis have shown that Citrobacter freundii is very versatile in its colony morphology, as well as in its biochemical, antigenic and pathogenic behaviours. This phenotypic versatility has made C. freundii difficult to identify and it is frequently confused with both Salmonella enterica and Escherichia coli. In order to determine the genomic events and to explain the mechanisms involved in this plasticity, six C. freundii isolates were selected from a phenotypic variation study. An I-CeuI genomic cleavage map was created and eight housekeeping genes, including 16S rRNA, were sequenced. In general, the results showed a range of both phenotypes and genotypes among the isolates with some revealing a greater similarity to C. freundii and some to S. enterica, while others were identified as phenotypic and genotypic intermediary states between the two species. The occurrence of these events in natural populations may have important implications for genomic diversification in bacterial evolution, especially when considering bacterial species boundaries. In addition, such events may have a profound impact on medical science in terms of treatment, course and outcomes of infectious diseases, evading the immune response, and understanding host-pathogen interactions.
Docencia e investigación en Medicina Legal: Situación actual y desafíos para las Facultades de Medicina de Chile
González W,Leonardo; Inzunza N,José Antonio; Bustos M,Luis; Vallejos V,Carlos; Gutiérrez L,René;
Revista médica de Chile , 2005, DOI: 10.4067/S0034-98872005000700008
Abstract: background:lawyers need some medical knowledge and physicians must know about forensics. aim: to explore training and research programs in forensic medicine in chilean universities. material and methods: deans of all medicine faculties in chile were contacted by e-mail and invited to answer a questionnaire containing 21 questions. a survey of chilean publications on forensic medicine was performed in medline, lilacs and scielo databases. results: fourteen deans answered the questionnaire. in all the responding faculties, forensic medicine is an obligatory course, generally during the fifth year and mostly combining theory with practice. in seven faculties, forensic medicine concepts are included in other courses. forensics is taught in only two of 10 dental schools, two of 17 nursing schools, one of nine midwives schools and one of nine medical technology schools. it is not taught in phonoaudiology, kinesiology and nutrition schools. there are 74 physicians that teach the specialty but only 10 are certified by the national board of medical specialty certification (conacem). treatment of most topics on forensics is insufficient. thanatology is the strongest topic and forensic dentistry is the weakest. there are 52 publications in the area, mostly on "medical law". conclusions: forensic medicine is taught in medical schools mostly as thanatology. the knowledge of forensics among medical students is limited and must be improved
Modeling of the Water Table Level Response Due to Extraordinary Precipitation Events: The Case of the Guadalupe Valley Aquifer  [PDF]
Javier González Ramírez, Rogelio Vázquez González
International Journal of Geosciences (IJG) , 2013, DOI: 10.4236/ijg.2013.46088
Abstract:

A two-dimensional algorithm for underground water flow simulation was modified and adapted to the geohydrologic conditions of the Guadalupe valley located in the state of Baja California in northern México. In order to solve the numerical model using the balance equation, the central finite differences with spatial and temporal constant increments method were used. Such model considers a heterogeneous and transient unconfined aquifer. Modeling and calibration processes are presented using the data of water table levels provided by the water level data loggers installed in a monitoring network and precipitation data from climatic stations of both seasons: 2009-2010 and 2010-2011. It was possible to locate, correlate and model specific rainfall-recharge events with the aim of obtaining an estimation of how these events are directly reflected on the water table level of the aquifer and how it reacts against simulated extraordinary events.

Dise?o de un índice espectral de la vegetación desde una perspectiva conjunta de los patrones exponenciales y lineales del crecimiento
Romero-Sánchez, Enrique;Paz-Pellat, Fernando;Palacios-Vélez, Enrique;Bola?os-González, Martín;Valdez-Lazalde, René;Aldrete, Arnulfo;
Agrociencia , 2009,
Abstract: this study analyzes different experiments with reflectance measurements to review the patterns of the first two constants of the models of radiative interaction in the red (r) and near infrared (nir) space. from experimental evidence, it is concluded that the first order model of interactions is sufficient for this aim. secondly, the algorithm of the spectral index iv_cimas is developed and applied to crop experiments, concluding that this index is only a relative improvement over the ndvicp index and that the expo-linear phase of the vegetative growth stage of the vegetation are well-described by both. the reproductive phase is not adequately modeled by either of the spectral indexes. finally, the models of sun-sensor geometry proposed are reviewed, and it is concluded that these have good experimental fit, allowing this geometry to be standardized. modeling of the associated patterns to the spectral curve constants of equal vegetation is very difficult to do because of properties of the spaces used. the problem of designing vegetation indexes is still open.
Durabilidad de la respuesta inmune antihepatitis B en trabajadores de la salud peruanos con 6 a?os de vacunados
González Griego,Antonio; Ramírez Albajés,Victoria; Almeida Varela,Ricardo; Zumaeta,Eduardo; Ferrandiz,Jorge; Villanueva,A; Soto,Víctor; Alerm González,Alina; Díaz,René; Antón Lolo,Manuel;
Revista Cubana de Investigaciones Biom??dicas , 2000,
Abstract: on the basis of the importance given by the health world organization and the disease control center to the protection of health workers against viral hepatitis b(hbv), the peruvian institute of social security(presently essalud) instructed in 1993 the vaccination of health personnel at risk in 4 national hospitals by using the cuban vaccine called herberbiovac hb(20 mg, 0,1,and 2 month schedule). the purpose was to evaluate the persistence of antibodies in the immunized workers six years after the immunization program and the possible presence of hb virus infection markers. sera from 144 health workers were studied covering 70.24% of seroprotected subjects in comparison with seroprotected subjects in the initial study. conventional immunoenzymatic methods were used to detect markers in the serum, hbsag and antibodies to hbcag were negative in all the serological samples, an outcome that showed that any of the vaccinated persons had traces of hb virus infection. the anti-hbsag was positive, seroconversion was 100% whereas seroprotection and hyperesponse amounted to 91.6 and 43.7% respectively. the mean lifetime of anti-hbsag is 3 years but it was predicted that the levels of antibodies would reach over 10 ui/l after 15 years of the vaccination schedule completion. subjects aged under 40 years had significantly higher levels of seroprotection and hyperesponse, being females those in the higher response categories. the evaluation of the post-vaccination reinforcement immunological response in seroconverted non-seroprotected cases and the extension of the work with essalud to other hospitals in the country were recommended
FECUNDACION ASISTIDA EMPLEANDO ESPERMATOZOIDES FRESCOS Y CRIOPRESERVADOS-DESCONGELADOS OBTENIDOS MEDIANTE BIOPSIA TESTICULAR (TESE)
Donoso P.,Patricio; Enríquez R.,Rodrigo; González S.,Patricio; Salinas S.,René; Triantafilo V.,Yasson; Roblero S.,Luis; Carrasco F.,Isabel; Duque A.,Gonzalo;
Revista chilena de obstetricia y ginecología , 2003, DOI: 10.4067/S0717-75262003000200002
Abstract: we performed a retrospective study in obstructive and non-obstructive azoospermic patients in which spermatozooa had been recovered through testicular biopsy (tese). the main objective was to compare the results of assisted reproductive technique using fresh testicular spermatozoa and frozen-thawed testicular spermatozoa. from a total of 18 cycles in 13 patients, 7 were done with sperm-injected oocyte fallopian transfer (soft) and 11 with icsi and uterine embryo transfer. fresh spermatozoa were used in 4 patients in the soft group and frozen-thawed spermatozoa in 3 patients resulting in 3 and 1 clinical pregnancy respectively. in the icsi group, 9 cycles used fresh spermatozoa obtaining three prergnancies and two frozen-thawed achieving 1 pregnancy. the fertilization rate was calculed considering only the cycles with uterine embryo transfer resulting in 78% for fresh sperm and 57.14% for frozen-thawed. the pregnancy rate per cycle was 38.46% and 40% for fresh and frozen-thawed sperm respectively. we conclude that the use of frozen thawed testicular sperm for icsi in azoospermic patients shows comparable results to fresh testicular sperm being an iinvaluable tool for the management of this pathology
DETERMINACION DEL GASTO ENERGETICO (GE) POR EL METODO FACTORIAL EN PATINADORES CUBANOS DE VELOCIDAD
López Galarraga,Aldo V; Izquierdo Miranda,Zonia; González Revuelta,María Elena; Hernández Yanes,Yoany; Romero Esquivel,René Jorge;
Revista Habanera de Ciencias M??dicas , 2009,
Abstract: four and five female and male speed roller skaters of cuban team were studied for nutritional status and energy cost estimation even as energy recommendations. a microcycle type of general (g) and special (s) training phases was the frame for measuring. ec was determined by factorial method. inferential statistics for estimating differences between variables by sex and phases of training was for p ≤ 0,05. in order to make energy recommendations a pal was also estimated. morphological characteristics were similar to those reported in colombian roller skaters and bmi was adequate. sport training energy cost was significantly different in both phases and tec was higher in g. it was observed that male skaters showed a trend to have higher values for all variables with the exception of discretionary activities in s and pal for both phases. energy recommendations depended on training phase of speed roller skaters.
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