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Search Results: 1 - 10 of 6828 matches for " Flores Aguirre "
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De los modelos animales a la práctica psicológica: El surgimiento de algunas técnicas aplicadas a problemas de salud
Flores Aguirre,Carlos Javier;
Suma Psicológica , 2011,
Abstract: the paper stands out the relevance and necessity of basic research as a particular mode of knowledge. the emergence of animal models and research paradigms in the origins of psychological science is described and mentioned several animal models used for studying certain human diseases. finally, we illustrate the link between basic research with animals and the practice of psychology.
De los modelos animales a la práctica psicológica: El surgimiento de algunas técnicas aplicadas a problemas de salud
Carlos Javier Flores Aguirre
Suma Psicológica , 2011,
Abstract: Se destaca la relevancia y necesidad de la investigación básica como un modoparticular de generación de conocimiento. Se describe el surgimiento de los modelosanimales como paradigmas de investigación en los orígenes de la cienciapsicológica y se menciona el uso de varios de ellos para el estudio de ciertaspatologías en humanos. Finalmente, se ilustra el vínculo entre la investigaciónbásica con animales y la práctica de la psicología.
Criminalización de la libertad de expresión: protesta social y administración local en Guayaquil
Flores Aguirre, Xavier
Iconos : Revista de Ciencias Sociales , 2007,
Abstract: Mediante el estudio de la detención de tres personas por protestar en contra de la Metrovía, este artículo analiza la naturaleza de la imposición de las políticas públicas en Guayaquil. Para el efecto, se recogen los hechos narrados en los medios de prensa de la ciudad, se los encuadra dentro de una práctica política local generalizada y se los contrasta con teorías contemporáneas de derechos humanos en materia de libertad de expresión. El artículo demuestra el carácter autoritario y antidemocrático de las autoridades locales y la necesidad de crear espacios que respeten y propicien el debate crítico entre las autoridades y la sociedad civil sobre las políticas públicas.
Efectos del intervalo entre ciclos y control del estímulo en programas definidos temporalmente
Mateos Morfín, Rebeca;Flores Aguirre, Carlos;
Revista mexicana de análisis de la conducta , 2009,
Abstract: two groups of rats were exposed to temporally defined schedules (td = 30 s, tδ=30 s) that differed by the length of an inter cycle interval (3 or 30 s) intruded between the end of tδ and the beginning of td. in order to evaluate stimulus functions development, both td and tδ were correlated with particular cues. response rate was higher in td than in tδ for the group exposed to the longer inter-cycle interval, whereas for the other group the inverse effect was observed. results are discussed in terms of stimulus functions development, highlighting a possible conditioned reinforcement function of the cue correlated with tδ subcycle.
SPAC: An alternative method to estimate earthquake site effects in Mexico City
Hortencia Flores Estrella,Jorge Aguirre González
Geofísica internacional , 2003,
Abstract: Microtremor recordings are a very useful tool for microzonation studies because of simple data acquisition and analysis. The Spatial Autocorrelation Method (SPAC) proposed by Aki (1957), may be used to constrain the velocity structure underlying the site with microtremor array measurements, and the site effect (dominant period and amplification) can be calculated. In this paper the SPAC method is applied to Ciudad Universitaria, Mexico City. Results are compared with those obtained by Kagawa (1996) with the F-K method. The velocity structure inferred using SPAC method is consistent with Kagawa′s results. We compare the transfer function obtained from the velocity model estimated by SPAC method with the transfer function from Kagawa′s velocity model, and from spectral ratios of earthquake data. We conclude that the velocity structure of a site can be estimated from microtremor recordings by the SPAC method.
RIQUEZA FLORISTICA DEL SANTUARIO DE LA NATURALEZA PALMAR EL SALTO, VI?A DEL MAR, REGION DE VALPARAISO, CHILE
Flores-Toro,Lorena; Aguirre-Saavedra,Francisco;
Gayana. Botánica , 2008, DOI: 10.4067/S0717-66432008000100007
Abstract: the nature sanctuary "palmar el salto", is home to the third largest jubaea chilensis (molina) baillon (chilean palm) population in the country. the objective of this study is to contribute to the knowledge of the flora found in the sanctuary and, to achieve this, thirty vegetation census were carried out with the phytosociologic method of the zurich-montpellier school. the flora consists of 234 species. conformed by 92 species, the endemic element is dominant in the flora. the most important species in the palm grove are: nassella chilensis (trin.) e.desv., chusquea cumingii nees, retanilla trinervia (gillies et hook.) hook. et arn. and jubaea chilensis, all native. stands out the presence of nine species with conservation problems, most of them vulnerable to extinction.
Tiempo relativo, elección demorada de reforzamiento en discriminación condicional
Flores Aguirre, Carlos Javier;Mateos Morfín, Laura Rebeca;
Revista mexicana de análisis de la conducta , 2009,
Abstract: some recent studies reported inconsistent results about the effects of delay of reinforcement and retention interval in different procedures varying the intereinforcer interval (e.g., schaal, schuh & branch, 1992; shahan & lattal, 2005; williams, 1998, 2003). the study was designed to evaluate the effects of delay of reinforcement and the retention interval in different conditions, with an intertrial interval constant or variable. rats were trained on a conditional discrimination procedure. in experiment 1 the intertrial interval (iti) was increased for a group (iti variable), while for another group the iti duration was constant, concurrently the stimulus-choice interval (retention interval) was increased. the effects of retention interval were smaller with longer iti's (variable group). experiment 2 was a reply of exp. 1, except the delay of reinforcement was increased (0, 2, 4 and 8 s). the percentage of correct responses was constant in all delay values. the occurrence of relative time effects in experiment 1, but not in experiment 2, suggest that different types of delay intervals (retention interval and delay of reinforcement) depend upon different psychological processes. the results are discussed in terms of differences in procedures and the generality of relative time effect.
Especies de Fusarium en granos de maíz recién cosechado y desgranado en el campo en la región de Ciudad Serdán, Puebla
García-Aguirre, Genoveva;Martínez-Flores, Rebeca;
Revista mexicana de biodiversidad , 2010,
Abstract: sixteen corn samples, 10 of national white corn and 6 of "criollo" white were analyzed to determine the fusaria species present on the kernels, especially those reported as ear and kernel rot inducers, mainly those mycotoxin producers. the identified species, ordered in relation to the number of obtained isolates were f. oxysporum, f. subglutinans, f. moniliforme, f. graminearum, f. anthophilum, f. poae, f. tricinctum, f. sporotrichioides, and f. proliferatum. the species f. oxysporum, f. tricinctum, and f. anthophilum have not been reported causing ear or kernel rots. all of the others have been reported as ear and kernel rots inducers, as well as stalk rots. besides, most of these species produce various mycotoxins, many of which are capable of causing health problems to humans and animals.
Probabilidad de reforzamiento diferencial y no diferencial en una tarea de discriminación condicional
FLORES-AGUIRRE,CARLOS JAVIER; MATEOS-MORFíN,REBECA;
Universitas Psychologica , 2010,
Abstract: using a conditional discrimination task, the correct responses for a group of rats (do) were reinforced with different probabilities (0.8 versus 0.4) depending the conditional cue; whereas for another group (ndo) the correct responses were reinforced with the same probability of reinforcement (0.6). after the training (acquisition), the retention interval and the delay of reinforcement were introduced in different phases. the subjects trained with differential outcomes (do) had a faster acquisition and reached higher discrimination index than non-differential group (ndo). the retention interval results in lower discrimination index in ndo group than in do group; no differential changes in accuracy were observed by the delay of reinforcement. the results extend the differential outcomes effect to a two-choice conditional discrimination task with rats varying the probability of reinforcement. the absence of delay of reinforcement effect is discussed.
RIQUEZA FLORISTICA DEL SANTUARIO DE LA NATURALEZA PALMAR EL SALTO, VI A DEL MAR, REGION DE VALPARAISO, CHILE FLORAL RICHNESS OF THE NATURE SANCTUARY PALMAR EL SALTO, VI A DEL MAR, VALPARAISO REGION, CHILE
Lorena Flores-Toro,Francisco Aguirre-Saavedra
Gayana. Botanica , 2008,
Abstract: El Santuario de la Naturaleza Palmar El Salto alberga la tercera población de Jubaea chilensis (Molina) Baillon (Palma chilena), más numerosa del país. El objetivo de este trabajo es contribuir al conocimiento de la flora presente en el Santuario. Se trabajó con 30 censos de vegetación levantados con la metodología fitosociológica de la escuela de Zurich-Montpellier. La flora está compuesta por 234 especies. En la flora domina el elemento endémico con 92 especies. Las más importantes en el palmar son: Nassella chilensis (Trin.) E.Desv., Chusquea cumingii Nees, Retanilla trinervia (Gillies et Hook.) Hook. et Arn. y Jubaea chilensis, todas autóctonas. Destaca la presencia de nueve especies con problemas de conservación, la mayoría vulnerables a la extinción. The Nature Sanctuary "Palmar El Salto", is home to the third largest Jubaea chilensis (Molina) Baillon (Chilean palm) population in the country. The objective of this study is to contribute to the knowledge of the flora found in the sanctuary and, to achieve this, thirty vegetation census were carried out with the phytosociologic method of the Zurich-Montpellier school. The flora consists of 234 species. Conformed by 92 species, the endemic element is dominant in the flora. The most important species in the palm grove are: Nassella chilensis (Trin.) E.Desv., Chusquea cumingii Nees, Retanilla trinervia (Gillies et Hook.) Hook. et Arn. and Jubaea chilensis, all native. Stands out the presence of nine species with conservation problems, most of them vulnerable to extinction.
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