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Search Results: 1 - 10 of 146401 matches for " MIGUEL CORDERO V "
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De la sobrevida al desarrollo integral de la infancia: Pasos en el desarrollo del sistema de protección integral a la infancia
HELIA MOLINA M,MIGUEL CORDERO V,VERóNICA SILVA V
Revista chilena de pediatría , 2008,
Abstract:
Areas of endemism of mexican terrestrial mammals: a case study using species? ecological niche modeling, parsimony analysis of endemicity and goloboff fit
Escalante,Tania; Sánchez-Cordero,Víctor; Morrone,Juan J; Linaje,Miguel;
Interciencia , 2007,
Abstract: areas of endemism of mexican terrestrial mammals using ecological niche modeling projected as species? potential distributions were identified to compare its performance with a previous analysis that used point occurrence data, and to incorporate goloboff fit to parsimony analysis of endemicity (pae) for improving identification of areas of endemism. six pae were performed, combined or not, with goloboff fit (k=0 and 2) using species? potential distributions of 429 terrestrial mammals overlaid on 248 by 232 quadrats of 1° latitude-longitude countrywide. consistency (ci) and retention (ri) indices were used for identifying endemic, characteristic, and possibly endemic species. based on the strict consensus cladogram with k=0, seven areas of endemism defined by two or more species were identified: the mexican plateau, the baja california peninsula (with a nested pattern of endemism in the south and north), chiapas (with a nested pattern of endemism in the south and north), the mexican pacific coast, the isthmus of tehuantepec, the sierra madre occidental, and the yucatan peninsula. pae cladograms using species? potential distributions showed a better resolution than those produced using point occurrence data, showing consensus with fewer number of steps and higher number of synapomorphies. goloboff fit (k) allowed individual down-weighting of "noisy" species, thus increasing the number of synapomorphies in the cladograms, and even identifying more areas of endemism. cladograms with k=0 had the largest number of synapomorphies, whereas k=2 allowed to obtain a smaller number of cladograms.
Perspectivas actuales del duelo en el fallecimiento de un recién nacido
Cordero V,Miguel ángel; Palacios B,Paulina; Mena N,Patricia; Medina H,Luis;
Revista chilena de pediatría , 2004, DOI: 10.4067/S0370-41062004000100011
Abstract: although death is a daily event in medicine, the psychological events that it bears and the human confrontation of it has not been studied frequently with scientific rigor. 25 years ago, faced with the death of a newborn child, it was recommended that the mother should not have contact with the baby, to administer sedatives to the family to avoid all emotional manifestations, not to speak of the subject, to forget the baby and to have other children. the present recommendations are exactly the opposite, but although there is more objective information, sometimes systematically obtained, there are only a few controlled studies. in general, many clinical guidelines are based on qualitative reports of the grief of a few parents and the opinions of specialists such as psychiatrists or psychotherapists. the objective of this article, based on literature review and the clinical experience of the authors, is to suggest guidelines that facilitates the support of the parents facing the death of their newborn child, based on the present knowledge available
Nuevos registros del ?tepezcuintle? (Agouti paca) para el norte del estado de Oaxaca, México
Botello, Francisco;Illoldi, Patricia;Linaje, Miguel;Monroy, Gabriela;Sánchez-Cordero, Víctor;
Revista mexicana de biodiversidad , 2005,
Abstract: using camera-traps in july 2004, two new records of the tepezcuintle (agouti paca) were obtained in the north of the state of oaxaca, mexico. this records widen the distributional range approximately 60 km west of the previous distribution proposed for this species.
Evaluación de la efectividad de las áreas protegidas para contener procesos de cambio en el uso del suelo y la vegetación. ?Un índice es suficiente?
Figueroa, Fernanda;Sánchez-Cordero, Víctor;Illoldi-Rangel, Patricia;Linaje, Miguel;
Revista mexicana de biodiversidad , 2011,
Abstract: effectiveness of 44 federal protected areas (pa) for preventing land use and land cover changes (lulc) in mexico is examined, comparing results and methodological approaches used in previous studies. we quantified the percentage of transformed area (ts) in 2002 and its rate of change between 1993 and 2002. we compared observed ts rate of change in pa, adjacent areas, and their ecoregions of location. an effectiveness index was build to produce a characterization of lulc processes developed for each pa. in 2002, 77% pa showed less than 20% covered by ts; nearly 30% of pa showed a reduction of ts. additionally, in 30% of pa, ts increase exceeded the mean rate for all pa. more than 70% of pa showed lower lulc rates than their surrounding areas, and in 80% of pa, these rates were lower than those observed in their corresponding ecoregions. overall, pa were effective to prevent lulc processes as previously suggested. however, trends derived from this type of analyses depend on methodological specifications. effectiveness indexes should be complemented with a detailed characterization of lulc processes and their interpretation should correspond to the specific methodological approach used.
Perspectivas actuales del duelo en el fallecimiento de un recién nacido Perspectives in the grief of a newborn child death
Miguel ángel Cordero V,Paulina Palacios B,Patricia Mena N,Luis Medina H
Revista chilena de pediatría , 2004,
Abstract: La muerte constituye un evento cotidiano en la medicina, sin embargo, los eventos psicológicos que la acompa an y el enfrentamiento humano de ella ha sido estudiado pocas veces con rigurosidad científica. Hace 25 a os, frente a la muerte de un recién nacido, se recomendaba que la madre no tuviese contacto con el ni o, administrar tranquilizantes a la familia para evitar toda manifestación emocional, no hablar del tema, olvidar al ni o y tener otros hijos. Las recomendaciones actuales son diametralmente opuestas, pero aunque hay más información objetiva, a veces sistemáticamente obtenida, aún son escasos los estudios bien controlados. En general muchas guías clínicas se fundamentan en reportes cualitativos del duelo de unos pocos padres y opiniones de especialistas como psiquiatras o psicoterapeutas. El propósito de este artículo, basado en la literatura y en la experiencia clínica de los autores, es sugerir a partir del conocimiento actual, pautas que faciliten el proceso de acompa amiento de los padres en el fallecimiento de un recién nacido Although death is a daily event in medicine, the psychological events that it bears and the human confrontation of it has not been studied frequently with scientific rigor. 25 years ago, faced with the death of a newborn child, it was recommended that the mother should not have contact with the baby, to administer sedatives to the family to avoid all emotional manifestations, not to speak of the subject, to forget the baby and to have other children. The present recommendations are exactly the opposite, but although there is more objective information, sometimes systematically obtained, there are only a few controlled studies. In general, many clinical guidelines are based on qualitative reports of the grief of a few parents and the opinions of specialists such as psychiatrists or psychotherapists. The objective of this article, based on literature review and the clinical experience of the authors, is to suggest guidelines that facilitates the support of the parents facing the death of their newborn child, based on the present knowledge available
Primer registro del Tigrillo (Leopardus Wiedii, Schinz 1821) y del Gato Montés (Lynx Rufus, Kerr 1792) en la reserva de la biósfera de Tehuacán-Cuicatlán, Oaxaca, México
Francisco Botello,Patricia Illoldi Rangel,Miguel Linaje,Víctor Sánchez Cordero
Acta zoológica mexicana , 2006,
Abstract: Using camera-traps, two new records of margay (Leopardus wiedii) and two of lynx (Lynx rufus)were obtained at the Biosphere Reserve de Tehuacán-Cuicatlán, Oaxaca, Mexico, in 2003 and 2004. These are the first records documenting the presence of both species in this reserve
Evaluación de la efectividad de las áreas protegidas para contener procesos de cambio en el uso del suelo y la vegetación. Un índice es suficiente? Evaluation of protected area effectiveness for preventing land use and land cover changes in Mexico. Is an index good enough?
Fernanda Figueroa,Víctor Sánchez-Cordero,Patricia Illoldi-Rangel,Miguel Linaje
Revista mexicana de biodiversidad , 2011,
Abstract: Se examina la efectividad de 44 áreas protegidas federales (AP) en México para evitar procesos de cambio en el uso del suelo y la vegetación (CUSV) y se comparan los métodos y resultados con los de algunos estudios previos. Se cuantificó el porcentaje de superficie transformada (ST) en 2002 y su tasa de cambio entre 1993 y de 2002 y se compararon las tasas de cambio observadas en las AP, en las áreas circundantes de cada AP y en sus respectivas ecorregiones. Se integró un índice de efectividad y se caracterizaron los procesos de CUSV en cada AP. En 2002, el 77% de las AP analizadas tenía menos de 20% de ST; casi 30% mostró una reducción en la ST, en tanto que en otro 30%, el incremento en la ST fue mayor que la tasa promedio de las AP analizadas. Poco más del 70% de las AP mostraron tasas de CUSV menores a las de sus áreas circundantes y en 80% de las AP, las tasas fueron menores que en sus ecorregiones. En general, estos resultados coinciden con estudios previos, pero existen variaciones según el enfoque metodológico utilizado. Consecuentemente, los índices de efectividad deben complementarse con una caracterización detallada de los procesos de CUSV y la interpretación de los resultados debe matizarse en función de los métodos. Effectiveness of 44 federal protected areas (PA) for preventing land use and land cover changes (LULC) in Mexico is examined, comparing results and methodological approaches used in previous studies. We quantified the percentage of transformed area (TS) in 2002 and its rate of change between 1993 and 2002. We compared observed TS rate of change in PA, adjacent areas, and their ecoregions of location. An effectiveness index was build to produce a characterization of LULC processes developed for each PA. In 2002, 77% PA showed less than 20% covered by TS; nearly 30% of PA showed a reduction of TS. Additionally, in 30% of PA, TS increase exceeded the mean rate for all PA. More than 70% of PA showed lower LULC rates than their surrounding areas, and in 80% of PA, these rates were lower than those observed in their corresponding ecoregions. Overall, PA were effective to prevent LULC processes as previously suggested. However, trends derived from this type of analyses depend on methodological specifications. Effectiveness indexes should be complemented with a detailed characterization of LULC processes and their interpretation should correspond to the specific methodological approach used.
Comparación de la Evaluación Tradicional del Desarrollo Psicomotor versus una Prueba Autoadministrada
SCHONHAUT B,LUISA; ARMIJO R,IVáN; MILLáN K,TERESA; HERREROS A,JOSEFINA; HERNáNDEZ R,KATHERINE; SALGADO V,ANA MARíA; CORDERO V,MIGUEL áNGEL;
Revista chilena de pediatría , 2010, DOI: 10.4067/S0370-41062010000600003
Abstract: introduction: the purpose of this study is to evaluate the applicability of a self-administered questionnaire in the screening of psychomotor development (pd) in a primary care setting (pc). for that purpose, the degree of concordance between the ages and stages questionnaire (asq) and a psychomotor development evaluation scale (escala de evaluación del desarrollo psicomotor-eedp) currently utilized in pc was tested. in addition, perceptions and value judgment by professionals who participated in the study were explored. methodology: this semi-quantitative study was performed between november 2008 and december 2009 in two pc centers of the metropolitan area of chile on full-term newborns of the well-baby clinic. at age 8 and 18 months, parents or primary caretakers were asked to fill out the asq, and a pc professional completed the eedp. correlation and concordance between both tests was measured. interviews and mini-focus groups were con-ducted with the participating professionals. results: three hundred and thirty newborns were recruited in the study. pd deficits were found on 8.79% of patients through the use of eedp and in 12.73% through the use of asq (p = 0,05). correlation between both evaluations was acceptable (r 0,5) as was concordance in deficit detection (kappa 0.576). the qualitative analysis showed appreciation of asq as a measuring tool as well as promoting awareness of pd. staff of the pc settings utilized various strategies to overcome deficiencies of a self-administered test in populations of higher socio-educational and cultural risk. conclusions: asq picked up significantly more pm deficits than eedp, while correlation and concordance indices between both tests were adequate. considering the subjective advantages expressed by staff in favor of asq, it is proposed that those pc centers that wish to implement the asq do so by progressively incorporating parents and caretakers into the observation of their children's development.
Clustering and fluidization in a one-dimensional granular system: molecular dynamics and direct-simulation Monte Carlo method
Jose Miguel Pasini,Patricio Cordero
Physics , 2000, DOI: 10.1103/PhysRevE.63.041302
Abstract: We study a 1-D granular gas of point-like particles not subject to gravity between two walls at temperatures T_left and T_right. The system exhibits two distinct regimes, depending on the normalized temperature difference Delta = (T_right - T_left)/(T_right + T_left): one completely fluidized and one in which a cluster coexists with the fluidized gas. When Delta is above a certain threshold, cluster formation is fully inhibited, obtaining a completely fluidized state. The mechanism that produces these two phases is explained. In the fluidized state the velocity distribution function exhibits peculiar non-Gaussian features. For this state, comparison between integration of the Boltzmann equation using the direct-simulation Monte Carlo method and results stemming from microscopic Newtonian molecular dynamics gives good coincidence, establishing that the non-Gaussian features observed do not arise from the onset of correlations.
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