OALib Journal期刊

ISSN: 2333-9721




2018 ( 14 )

2017 ( 260 )

2016 ( 369 )

2015 ( 7299 )


匹配条件: “Elsys Cárdenas” ,找到相关结果约219018条。
Alicia Kompalic Cristo,Luis Eduardo Traviezo Valles,Elsys Cárdenas,Mario Torres
Salud, Arte y Cuidado , 2011,
Abstract: The aim of this research was to study the frequency of intestinal parasites in patients from three communities belonging to the state of Lara, Venezuela. A rural community, Miracuy, Andrés Eloy Blanco municipality, a suburban community, Agua Viva, Palavecino municipality and a third community (control group) consisting of samples made of patients from Barquisimeto, a city in the Iribarren municipality of the state of Lara. After the application of the coprological techniques to each stool sample, a total of 503 samples was obtained. From those samples, 35,8% belonged to the urban group, 48,9% to the suburban group and 15,3% to the rural one. The group with the highest proportion of intestinal parasites was the rural one (80,5%). The most common parasites were the protozoa, being Blastocystis hominis the most prevalent in the three groups, followed by Giardia lamblia and Endolimax nana. Among helminths, Ascaris lumbricoides was the most common metazoan, followed by Trichuris trichiura. It is considered that the high prevalence rates in these parasitic diseases are associated with lack of information, as well as living conditions in marginal and rural population, including the lack of enforcement of hygiene, health education, adequate water storage, poor sewage systems and garbage disposal, among others. Funded by UCLA project CDCHT-013-ME-2008.
Jeanette Delmoral,Luis Eduardo Traviezo Valles,Elsys Cárdenas,Alicia Kompalic
Salud, Arte y Cuidado , 2009,
Abstract: We report a human case of Babesia sp., Which is a frequent coccidian parasite in cattle, dogs and cats but rare inhumans. These female patient four years of age whose mother reported anemia, approximately two months duration,concomitant hyperoxia and generalized weakness, and it is transferred to the Social Security Hospital, being evaluated bya general practitioner, who said tests laboratory, which showed the presence of parasites in blood. In view of these resultsis referred to the Section of Medical Parasitology at UCLA, where he performed peripheral blood smears observed bymorphological and morphometric analysis, the presence of Babesia sp., An obligatory intraerythrocytic parasite
Epidemiología de la enfermedad de Chagas en el municipio Andrés Eloy Blanco, Lara, Venezuela: infestación triatomínica y seroprevalencia en humanos
Rodríguez-Bonfante, Claudina;Amaro, Aned;García, María;Mejías Wohlert, Ligia Elena;Guillen, Pamela;Antonio García, Rafael;álvarez, Naysan;Díaz, Marialejandra;Cárdenas, Elsys;Castillo, Silvia;Bonfante-Garrido, Rafael;Bonfante-Cabarcas, Rafael;
Cadernos de Saúde Pública , 2007, DOI: 10.1590/S0102-311X2007000500015
Abstract: a seroepidemiological survey and vector captures were performed in four rural communities in andrés eloy blanco, lara state, venezuela. systematic random sampling was based on family clusters, with samples drawn from 869 individuals to determine anti-trypanosoma cruzi and anti-leishmania sp. antibodies by indirect immunofluorescence. positive individuals were defined as > 1:32 for anti-t. cruzi antibody and non-reactive to leishmania sp. antigen, revealing an antibody frequency of 6.9% (n = 60), of whom 46.66% were females and 53.33% males and 60% were over 39 years of age. some 5 (8.33%) seropositive individuals were under 10 years of age and 10 (16.66%) under 20 years. rhodnius prolixus and panstrongylus geniculatus were the triatomines captured, with infestation rates of 1.9% and 10.54%, colonization index of 0% and 18.18% in infested houses, and a t. cruzi infection index of 20% and 5.07%, respectively. the results suggest active chagas disease transmission in andrés eloy blanco in the last two decades and that p. geniculatus is replacing r. prolixus as the chagas disease vector.
An Iterative Method for Solving Two Special Cases of Lane-Emden Type Equation  [PDF]
Pedro Pablo Cárdenas Alzate
American Journal of Computational Mathematics (AJCM) , 2014, DOI: 10.4236/ajcm.2014.43021

In this work we apply the differential transformation method or DTM for solving some classes of Lane-Emden type equations as a model for the dimensionless density distribution in an isothermal gas sphere \"\" and as a study of the gravitational potential of (white-dwarf) stars ,\"\" which are nonlinear ordinary differential equations on the semi-infinite domain [1] [2]. The efficiency of the DTM is illustrated by investigating the convergence results for this type of the Lane-Emden equations. The numerical results show the reliability and accuracy of this method.

A Survey of the Implementation of Numerical Schemes for Linear Advection Equation  [PDF]
Pedro Pablo Cárdenas Alzate
Advances in Pure Mathematics (APM) , 2014, DOI: 10.4236/apm.2014.48052

The interpolation method in a semi-Lagrangian scheme is decisive to its performance. Given the number of grid points one is considering to use for the interpolation, it does not necessarily follow that maximum formal accuracy should give the best results. For the advection equation, the driving force of this method is the method of the characteristics, which accounts for the flow of information in the model equation. This leads naturally to an interpolation problem since the foot point is not in general located on a grid point. We use another interpolation scheme that will allow achieving the high order for the box initial condition.

A Survey of the Implementation of Numerical Schemes for the Heat Equation Using Forward Euler in Time  [PDF]
Pedro Pablo Cárdenas Alzate
Journal of Applied Mathematics and Physics (JAMP) , 2014, DOI: 10.4236/jamp.2014.213135
Abstract: We establish the conditions for the compute of the Global Truncation Error (GTE), stability restriction on the time step and we prove the consistency using forward Euler in time and a fourth order discretization in space for Heat Equation with smooth initial conditions and Dirichlet boundary conditions.
A Special Case of Variational Formulation for Two-Point Boundary Value Problem in L2(Ω)  [PDF]
Pedro Pablo Cárdenas Alzate
Applied Mathematics (AM) , 2015, DOI: 10.4236/am.2015.64065
Abstract: We consider the nonlinear boundary value problems for elliptic partial differential equations and using a maximum principle for this problem we show uniqueness and continuous dependence on data. We use the strong version of the maximum principle to prove that all solutions of two-point BVP are positives and we also show a numerical example by applying finite difference method for a two-point BVP in one dimension based on discrete version of the maximum principle.
?Y VERáS COMO QUIEREN EN CHILE...?: Un estudio sobre el prejuicio hacia los inmigrantes bolivianos por parte de los jóvenes chilenos
Cárdenas C,Manuel;
Ultima década , 2006, DOI: 10.4067/S0718-22362006000100006
Abstract: the main objective of this study was to investigate in the forms that the prejudice takes towards the immigrants of bolivian origin. we have used the typology that stem from the scales of subtle and blatant prejudice (pettigrew and meertens, 1995) to compare to the subjects in different psycosocial variables relevant in the existing literature on prejudice and racism. the sample was formed of 167 school students of last year of average education, belonging to diverse education centers both public and private of the antofa-gasta city, chile.
Psicología social y contexto: sobre la fuerza de las situaciones sociales perversas
Manuel Cárdenas C.
Límite , 2006,
Abstract: Para entender la conducta de los sujetos y comprender lo que pasa al interior de los individuos haríamos mejor si dejásemos de mirar únicamente al interior de éstos y nos centramos en las condiciones sociales que sirven de marco para su acción. De lo que se trata es de mirar afuera para comprender lo que pasa dentro, de entender que las acciones correctivas sobre ciertos fenómenos sociales sólo son posibles de ser abordadas desde los marcos que delimitan la acción de los individuos y sus relaciones, y no pueden ser achacadas exclusivamente a éstos. Para abordar este tema se hace referencia a tres conocidos experimentos en Psicología Social que nos muestran qué ocurre cuando los sujetos son puestos en situaciones perversas.
Laser in medicine Láser en medicina
Juan C. Cárdenas
Iatreia , 1993,
Abstract: The fundamentals of laser functioning and a brief historic description on the subject are presented; laser Is classified according to emission potency, materials with which it is built and pulsation. Different mechanisms of action of laser as well as Its indications and contraindications are discussed. Emphasis is given to low-power laser. Local and foreign experiences with Its medlcal use are briefly described Se revisan los principios fundamentales del funcionamiento del láser, se hace una breve revisión histórica del mismo y se lo clasifica de acuerdo con la potencia de emisión, los materiales de fabricación y la pulsación. Se enumeran los diferentes mecanismos de acción del láser y sus indicaciones y contraindicaciones haciendo énfasis en lo concerniente al láser de baja potencia, tanto pulsado como no pulsado; se alude a las experiencias nacionales y de otros países.

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