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Search Results: 1 - 10 of 462136 matches for " Mejía Mejía "
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Evaluación económica de programas y servicios de salud
Mejía Mejía,Aurelio;
Revista Gerencia y Políticas de Salud , 2008,
Abstract: the gap between what medicine can do and what it is economically feasible to do makes more relevant the economic evaluation of health care programmes as a tool that makes explicit what otherwise would be implicit and informs decision makers about the health impact and resource use of different health programmes, which may offer society a better understanding of political process and resource allocation. this article shows the steps in an economic evaluation in health. also, some methodological issues are discussed.
An Alternative Manifold for Cosmology Using Seifert Fibered and Hyperbolic Spaces  [PDF]
Maria E. Mejía, Reinaldo R. Rosa
Applied Mathematics (AM) , 2014, DOI: 10.4236/am.2014.56096

We propose a model with 3-dimensional spatial sections, constructed from hyperbolic cusp space glued to Seifert manifolds which are in this case homology spheres. The topological part of this research is based on Thurston’s conjecture which states that any 3-dimensional manifold has a canonical decomposition into parts, each of which has a particular geometric structure. In our case, each part is either a Seifert fibered or a cusp hyperbolic space. In our construction we remove tubular neighbourhoods of singular orbits in areas of Seifert fibered manifolds using a splice operation and replace each with a cusp hyperbolic space. We thus achieve elimination of all singularities, which appear in the standard-like cosmological models, replacing them by “a torus to infinity”. From this construction, we propose an alternative manifold for cosmology with finite volume and without Friedmann-like singularities. This manifold was used for calculating coupling constants. Obtaining in this way a theoretical explanation for fundamental forces is at least in the sense of the hierarchy.

CV3D – Reconstrucción tridimensional de imágenes tomográficas
Sergio Mejía,Juan Mejía
Iatreia , 2001,
Abstract: Las técnicas de reconstrucción tridimensional han ampliado el horizonte de las imágenes médicas al permitir la visualización de volúmenes en lugar de superficies de 2 dimensiones lo que permite encontrar relaciones anatómicas que facilitan los diagnósticos y mejoran los enfoques terapéuticos. Se desarrollará un programa en entorno MATLAB para la reconstrucción 3D de imágenes tomográficas digitales.
La investigación con células troncales humanas embrionarias y adultas: El nacimiento de la medicina regenerativa Perspectivas científicas, implicaciones epistemológicas y dilemas bioéticos
Mejía Rivera,Orlando;
Acta Medica Colombiana , 2007,
Abstract: research with stem cells is the most promising medical discovery for understanding and management of pathologies incurable so far. but besides that, it also announces the birth of regenerative medicine. this article analyses the state of the art with human embryonic and adult stem cells research, from the perspective of its revolutionary biological implications (questioning the classical embryology dogma of modern cardiology as well as the modern neurology dogma, epistemology (insufficient explanation of the mechanistic model of molecular biology) and its bioethical dilemma (moral statute of the embryo, creation of human - non - human and clinical research protocols).
La genética y la medicina predictiva: Implicaciones epistemológicas y consideraciones bioéticas
Acta Medica Colombiana , 2005,
Abstract: el desarrollo de las pruebas diagnósticas genéticas, tanto de las enfermedades monogenéticas de aparición temprana como de las enfermedades de aparición tardía, y de las pruebas de predisposición, están generando una transformación epistemológica en la medicina contemporánea. pues se comienza a pasar de los modelos clásicos del diagnóstico clínico basado en lo anatomopatológico, lo fisiopatológico y lo etiopatogénico, a un nuevo paradigma diagnóstico que se puede denominar como el modelo genómico. en este trabajo se analizan los dilemas bioéticos y sociales de los distintos tipos de pruebas predictivas del diagnóstico genético.
Las posibilidades de la terapia génica y sus dilemas bioéticos
Acta Medica Colombiana , 2005,
Abstract: according to anderson, gene therapy has four levels of application; somatic cells, germinal cells, perfective therapy and eugenic manipulation. an analysis of the bio-ethical dilemma in each therapy level is made and the so called evolution concept is stated to question the wish of some scientists to start gene therapy from germ cells. likewise, there is a warning about the hazards of starting perfective therapy and eugenic manipulation due to the social and political implications of positive eugenics programs reactivation.
El nuevo paradigma genético y la naturaleza humana: Una perspectiva desde la bioética reflexiva y secular
Acta Medica Colombiana , 2005,
Abstract: genetics has become the scientific area with the greatest bio-ethical and social implications, due its transformation power upon what has been considered, so far, as human nature. this work's objective is to analyze the relationship between the genetic paradigm, the historical notion of human essence and the contemporary anthropocentric and evolution models of human nature; using conceptual elements that correspond to reflexive, secular and critical bio-ethics to try to better understand the ideological basis of genomic medicine technologies.
Combinación de carcinomas de ri?ón y próstata, con metástasis del primero a parótida y pulmón
Acta Medica Colombiana , 2010,
Abstract: the case is reported of a patient with renal cell carcinoma who underwent radical nephrectomy. four years later, metastases were found in the right parotid gland. surgical excision of the parotid and radical neck dissection were then performed. one year later, metastases were found in the right lung, which prompted surgical ablation of the upper lobe. one year after the nephrectomy, the patient presented with adenocarcinoma of the prostate, which required radical prostatectomy. a discussion of the case and of recent information about the combination of these neoplastic diseases is carried out (acta med colomb 2009; 35: 26-30).
El diagnóstico de preimplantación genética. Perspectivas científicas y dilemas bioéticos
Acta Medica Colombiana , 2005,
Abstract: the diagnosis of genetic pre-implantation (pgd) is the most recent test amongst the genetic diagnostic techniques. this works analyses its development, medical indications and bio-ethical dilemma that may occur with indiscriminate use. it has been proposed as well that some questions guiding the physicians in the decision making process to implant or not an embryo with some genetic defect. and last, some philosophical issues are also analyzed in pro or against pgd.
El diagnóstico de preimplantación genética, el caso Nash y las indicaciones no médicas: De la transgresión del imperativo kantiano a las advertencias de Habermas
Acta Medica Colombiana , 2005,
Abstract: the diagnosis of genetic pre-implantation (gpd) has extended its use and indications beyond the limits of genetic abnormalities detection. with the nash case, the first step to the so called, embryos' constructions has been taken, and for the first time, an embryo has been manipulated to benefit a third party alive. this work analyses the scientific and bio ethical aspects of this case. interpretation of the implications of kant's mandate transgression, that says that every rational being must be an end by itself and not a means to serve others. likewise, the warnings made by the philosopher jurgen habermas are exposed; the use of gpd as a positive eugenics technique. and last, other non medical indications of gpd and the bio-ethical dilemma are shown.
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