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Search Results: 1 - 10 of 14390 matches for " Eugenia;GARCIA "
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On Quantum Momentum Maps associated to non Ad*-equivariant Classical Momentum Maps
Maria Eugenia Garcia,Marcela Zuccalli
Physics , 2009,
Abstract: In an interesting work M.F. Muller-Bahns and N. Neumaier ("Some remarks on g-invariant Fedosov star products and quantum momentum mappings". Journal of Geometry and Physics 50 (2004), 257-272.) analyze the existence of a quantum momentum map based on the existence of a classical momentum map providing an answer to the proposal given by P. Xu in ("Fedosov *-products and quantum momentum maps". Commun. Math. Phys (1998) 167-197). In both papers only equivariant classical momentum maps are considered. In these notes, we extend Muller-Bahns and Neumaier analysis to the case of a non equivariant momentum map. In addition, we propose the notion of an anomalous quantum momentum map as an alternative to recover a non equivariant momentum map at the classical level by considering central extensions of the Lie algebra associated with non equivariance.
Mining and Seasonal Variation of the Metals Concentration in the Puyango River Basin—Ecuador  [PDF]
Maria Eugenia Garcia, Oscar Betancourt, Edwin Cueva, Jean Remy D. Gimaraes
Journal of Environmental Protection (JEP) , 2012, DOI: 10.4236/jep.2012.311170
Abstract: The Puyango River Basin covers approximately an area of 4400 km2, it is located in Southern of Ecuador, with Calera and Amarillo rivers as tributaries. In this region, one of the main activities is small scale gold and silver mining. Currently there are 110 processing plants on the bank of Calera and Amarillo rivers, causing a significant degradation of natural resources. A seasonal comparison of metal concentrations in surface water, sediments and particulate matter from the Puyango River and its effluents is made. It was done a differentiation between natural contaminations with the anthropogenic one generated by mining activity. Samples were taken during dry season (2004) and rainy season (2006), and analyzed physicochemical parameters, anions and cations and the concentrations of heavy metals. The results show a clear influence of gold mining in Puyango River contamination, starting with its tributaries, Calera and Amarillo rivers, which have the highest concentrations of heavy metals from the basin, corresponding with the location of the mineral processing plants.
Risk Factors for Posttraumatic Stress Disorder in Haitian Students  [PDF]
Gretel Silvestre, Pascale Anacréon, Michèle Théodore, Emmanuel Silvestre, Eugenia Garcia-Dubus
Psychology (PSYCH) , 2014, DOI: 10.4236/psych.2014.58096
Abstract:

The aim of this study was to assess the prevalence of posttraumatic stress disorder (PTSD) in undergraduate students after the Haiti earthquake on January 12, 2010, as well as to identify the risk factors involved in the development of PTSD symptoms in this sample. Evaluations concerning depression, anxiety, risk and protective factors, and PTSD symptoms were conducted in 246 Haitian undergraduate students enrolled in a Dominican private university. Results indicate a prevalence of 36% for PTSD 2 years after the earthquake, with a high prevalence also of depression (31.7%) and anxiety (21.1%). Some of the risk factors identified are being female, a history of psychiatric treatment, and the amount of personal and material losses. The instauration of crisis management and follow-up protocols after traumatic events was deemed to be needed. Further research is necessary to study the long-term effects of this tragedy, not only in undergraduate students, but also in the working class Haitian immigrants living in the Dominican Republic.

APLICACIóN DE SALES DE TETRAZOLIO DE NUEVA GENERACION (XTT) PARA LA ESTIMACION DE LA DENSIDAD DE MICROORGANISMOS DEGRADADORES DE HIDROCARBUROS EN SUELOS DE LA ECORREGION CAFETERA COLOMBIANA
Vallejo Quintero Victoria Eugenia,Yanine Habib,Roldan Garcia Fabio Augusto
Acta Biológica Colombiana , 2010,
Abstract: El presente estudio evaluó el desempe o de dos sales de tetrazolio, una tradicional: INT y una de nueva generación: XTT, para estimar la densidad de microorganismos degradadores de hidrocarburos (HCs) en suelos empleando la técnica del Número Más Probable (NMP). Se analizaron 96 muestras de suelo con diferente historia de uso en la Ecorregión Cafetera de Colombia. Los microorganismos fueron recuperados en agar mínimo en atmósfera saturada de HCs y la capacidad degradadora fue confirmada por repiques sucesivos utilizando diesel como fuente de carbono. No se observaron diferencias en los recuentos de microorganismos degradadores obtenidos con las dos sales (t de Student, p<0,05), pero el XTT permitió mejor visualización de los pozos positivos dada la solubilidad del producto reducido, mientras que el INT produjo precipitación, debido al formazán insoluble generado, dificultando la lectura. Se obtuvo un mayor porcentaje de aislamientos empleando XTT (67%), lo cual podría indicar que el tipo de sal es determinante en la recuperación de estas bacterias. Adicionalmente, se evaluó el límite de detección celular, las condiciones óptimas de concentración de XTT y el tiempo de incubación necesario para la detección de actividad microbiana utilizando la cepa Acinetobacter sp. El aumento en la concentración de XTT de 0,5mM a 2mM y el tiempo tuvieron un efecto inhibitorio y favorable respectivamente, en la recuperación de células viables y el límite de detección de la técnica fue de 102 UFC/ml; la producción de XTT-formazán se relacionó positivamente con la concentración inicial de células y negativamente con el tiempo de incubación.
Recurrent and de novo non-alcoholic steatohepatitis following orthotopic liver transplantation
GARCIA Raquel F. Liermann,MORALES Eugenia,GARCIA Christian Evangelista,SAKSENA Sushma
Arquivos de Gastroenterologia , 2001,
Abstract: Background - Non-alcoholic steatohepatitis was coined in 1980 to describe pathological and clinical features of non-alcoholic disease associated with pathological features, commonly seen in alcoholic-liver disease itself. It is now a well-recognised cause of end-stage liver disease and a rare cause of orthotopic liver transplantation. A small number of cases with recurrent non-alcoholic steatohepatitis following liver transplantation have been reported, however de novo non-alcoholic steatohepatitis in the liver allograft is not well recognised. Aims/Results - We report four cases of non-alcoholic steatohepatitis following orthotopic liver transplantation describing the factors related with the pathology. The recurrence of fatty infiltration occurred within 21 months and transition from mild steatosis to non-alcoholic steatohepatitis and early fibrosis was observed within 60 months post transplant in all four patients. All four cases had association with one or multiples risk factors (obesity, type 2 diabetes and/or hyperlipidemia). Conclusions - Management of this risk factors may play a therapeutic role in the prevention of recurrent and de novo non-alcoholic steatohepatitis following orthotopic liver transplantation.
Effect of user fee on patient’s welfare and efficiency in a two tier health care market  [PDF]
Eugenia Amporfu
Health (Health) , 2010, DOI: 10.4236/health.2010.29164
Abstract: This is a theoretical paper examining the effect of user fee on patients’ welfare and social welfare under three forms of provider reimbursements: full cost, prospective payment and cost sharing. The paper extends Rickman and McGuire (1999) by introducing user fee to the public sector and maintaining the assumption that providers can work in both the private and public health sectors. Contrary to previous studies, this study shows that efficiency is possible under the full cost reimbursement. The paper also shows the conditions under which efficiency is possible under each reimbursement scheme. Patient’s welfare can improve with the introduction of user fee when services in the public and private sector are complementary.
Estimating the effect of early discharge policy on readmission rate. An instrumental variable approach  [PDF]
Eugenia Amporfu
Health (Health) , 2010, DOI: 10.4236/health.2010.25075
Abstract: Early discharge policy, common in the developed countries, refers to the reduction of hospital length of stay as a way of reducing the cost of care. The effect of the policy on quality of care has received a lot of attention in the literature. Some of the earlier papers have ignored the endogeneity of length of stay in the readmission equation, an approach that could lead to inconsistent estimation. This study develops a statistical technique for the consistent estimation of the effect of the early discharge policy. An instrument that can be used extensively across different diagnostic groups is provided, hence solving the difficult problem of finding an instrument for length of stay. The exogeneity test in Gorgger (1990), the test for weak instruments in Staiger and Stock (1997) as well as the Hensen (1982) for over identification confirmed respectively that length of stay is endogenous the instrument is strong and the valid.
A theoretical analysis of how user fee on healthcare can waste economic resources  [PDF]
Eugenia Amporfu
Health (Health) , 2014, DOI: 10.4236/health.2014.61020
Abstract: The difficulty of assessing funds to directly fund healthcare for the poor makes governments adopt user fee in the health system. Many studies have shown how user fee can cause the poor to under utilize healthcare but not on how it can lead to the waste of resources. The current study is theoretical and it examines the efficiency of regulated user fee and the factors affecting the efficiency. Efficiency focused mainly on the extent to which resources are wasted as a result of regulated user fee. The results show that the asymmetric information between the provider of healthcare and the patient combined with the costliness of investigation by the government as well as the costliness of revenue collection caused three sources of waste: excessive treatment of the rich or the non-poor, investigation and revenue collection. Comparative statics were done to examine the effect of various factors on the level of waste. The study then examined the conditions under with regulated user fee is more efficient than direct financing of healthcare by the government. Some recommendations were made to reduce wastes.
Recurrent and de novo non-alcoholic steatohepatitis following orthotopic liver transplantation
GARCIA, Raquel F. Liermann;MORALES, Eugenia;GARCIA, Christian Evangelista;SAKSENA, Sushma;HüBSCHER, Stefan G.;ELIAS, Elwin;
Arquivos de Gastroenterologia , 2001, DOI: 10.1590/S0004-28032001000400007
Abstract: background ? non-alcoholic steatohepatitis was coined in 1980 to describe pathological and clinical features of non-alcoholic disease associated with pathological features, commonly seen in alcoholic-liver disease itself. it is now a well-recognised cause of end-stage liver disease and a rare cause of orthotopic liver transplantation. a small number of cases with recurrent non-alcoholic steatohepatitis following liver transplantation have been reported, however de novo non-alcoholic steatohepatitis in the liver allograft is not well recognised. aims/results - we report four cases of non-alcoholic steatohepatitis following orthotopic liver transplantation describing the factors related with the pathology. the recurrence of fatty infiltration occurred within 21 months and transition from mild steatosis to non-alcoholic steatohepatitis and early fibrosis was observed within 60 months post transplant in all four patients. all four cases had association with one or multiples risk factors (obesity, type 2 diabetes and/or hyperlipidemia). conclusions - management of this risk factors may play a therapeutic role in the prevention of recurrent and de novo non-alcoholic steatohepatitis following orthotopic liver transplantation.
Educational Milieu Formation: Social and Cultural Aspects  [PDF]
Eugenia V. Listvina
Open Journal of Social Sciences (JSS) , 2014, DOI: 10.4236/jss.2014.25012
Abstract: This paper presents the interrelationship between the concepts of educational milieu and educational area, characterized by systematic, internal integrity. The attempt is also undertaken to specify the relationship of the educational milieu with the determination of the culture role in the education itself. The author notes the fundamental role of cultural and mental components inscribed in the very structure of the educational milieu in the process of getting education. In the context of educational process elements unification educational milieu contributes to the preservation of the socio-cultural persistent forms developed on the basis of cultural traditions.
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