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Search Results: 1 - 10 of 8865 matches for " Aureliano Campos Orjuela "
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Modelo de evaluación de la sostenibilidad territorial de Bogotá: Una propuesta multicriterio con enfoque modelizador de la movilidad de las ciudades
Martínez Rivillas,Alexander; Barragán Zaque,William; Campos Orjuela,Aureliano;
Revista de Ingeniería , 2010,
Abstract: the main objective of this essay is to demonstrate the predictability of a landscape sustainability assessment model for bogotá, based upon primary and secondary sources. the model's predictability lies on the relevance of considered variables, as well as the consistent interaction among those variables in order to explain multifactor phenomena, such as the sustainable mobility of a city. finally, a set of possible scenarios, which are aimed to improve the implementation of a sustainable mobility policy, will be presented. this set will be the result of the sustainable mobility assessment model created as a predictive model for the city.
Modelo de evaluación de la sostenibilidad territorial de Bogotá: Una propuesta multicriterio con enfoque modelizador de la movilidad de las ciudades
Alexander Martínez Rivillas,William Barragán Zaque,Aureliano Campos Orjuela
Revista de Ingeniería , 2010,
Abstract: El objetivo principal de este artículo es mostrar la capacidad predictiva de un modelo de sostenibilidad territorial para Bogotá, fundamentado en información multidimensional primaria y derivada. Su capacidad predictiva reside en la pertinencia de las variables consideradas y en la articulación consistente de ellas, para explicar fenómenos multifactoriales como la movilidad sostenible de una ciudad. Finalmente, se presenta un conjunto de escenarios posibles para mejorar los procesos de implementación de una política de movilidad sostenible en Bogotá, con base en los resultados de un modelo de evaluación de la sostenibilidad de la ciudad, concebido en virtud del modelo predictivo.The main objective of this essay is to demonstrate the predictability of a landscape sustainability assessment model for Bogotá, based upon primary and secondary sources. The model's predictability lies on the relevance of considered variables, as well as the consistent interaction among those variables in order to explain multifactor phenomena, such as the sustainable mobility of a city. Finally, a set of possible scenarios, which are aimed to improve the implementation of a sustainable mobility policy, will be presented. This set will be the result of the sustainable mobility assessment model created as a predictive model for the city.
EL POSPARTO EN LA VACA POST-PARTUM IN THE CATTLE
Góngora Orjuela Agustín,Hernández Vásquez Aureliano
Revista de la Facultad de Medicina Veterinaria y de Zootecnia , 2007,
Abstract: El posparto es un periodo crítico del ciclo reproductivo del bovino. Para que se reasuma la función reproductiva después del parto, es necesario que haya involución uterina, cese la inhibición de la función del hipotálamo y la hipófisis para que se restablezcan el patrón de secreción de la hormona luteinizante y la ovulación. En el presente artículo se discuten sucintamente los aspectos más relevantes que influyen en la restauración de la función reproductiva, a saber: el amamantamiento y cercanía del ternero a la madre, presencia del toro en el hato, la nutrición, las reservas energéticas de la madre y el efecto del suministro de algunas hormonas. The postpartum is a critical period during the reproductive life of a cow. In a general approach, the return to reproductive function after parturition, depends on uterine involution and cessation of the inhibition of hypothalamic and hypophyseal functions. In the present revision, known relevant factors aspects which influence postpartum reproductive physiology, are briefly discussed, including suckling, nutrition and energy status of the cow, contact with the calf and presence of a bull, and the effect of time of the year at parturition, as well as the use of hormonal therapies.
Implante de resincronizador cardiaco por vía femoral: Una alternativa para accesos subclavios difíciles Cardiac resynchronization device implantation via the femoral artery: An alternative to difficult subclavian access
Alejandro Orjuela
Revista Colombiana de Cardiología , 2012,
Abstract: Pese a que no hay duda del beneficio de la terapia de resincronización cardiaca, el incremento del uso de esta técnica deja entrever dificultades en el posicionamiento de los electrodos y en particular del electrodo izquierdo. Se describe el caso de un hombre con indicación de terapia de resincronización cardiaca en quien, por anormalidades anatómicas de los vasos venosos izquierdos y por contraindicación para el uso de la región subclavia derecha, se utilizó la vía femoral derecha con éxito, hecho que permite mostrarla como una alternativa práctica y segura para el implante de resincronizadores cardiacos. Although there is no doubt of the benefit of cardiac resynchronization therapy, the increased use of this technique allows to see the difficulties in the positioning of electrodes, particularly of the left electrode. We describe the case of a man with an indication of cardiac resynchronization therapy in whom due to anatomical abnormalities of the left venous vessels and contraindication for the use of the right subclavian region, the right femoral route was successfully used. This allows us to show the femoral route as a practical and safe alternative for the implantation of cardiac resynchronization devices.
Angioplastia del seno coronario en el implante de electrodo del ventrículo izquierdo Angioplasty of coronary sinus in left ventricle electrode implant
Alejandro Orjuela
Revista Colombiana de Cardiología , 2011,
Abstract: Con el incremento de implantes de dispositivos de estimulación cardíaca en pacientes con miocardiopatía dilatada, el diseno día a día más sofisticado de los mismos para satisfacer los requerimientos de los pacientes con cambios anatómicos que surgen como consecuencia de la misma dilatación cardíaca, tales como modificaciones en el calibre, curso, longitud y número de venas coronarias, cada vez se encuentran mayores dificultades para lograr los objetivos anatómicos, en particular el sitio ideal de posicionamiento del electrodo de estimulación ventricular izquierda en el seno coronario. Esta situación limita, en algunos casos, el beneficio terapéutico de esta técnica, viéndose, en ocasiones, en la necesidad de someter al paciente a toracotomía para posicionar el electrodo en el epicardio posterolateral del ventrículo izquierdo. Es así como, con el objetivo de abreviar los tiempos y la morbimortalidad e incrementar el éxito del implante, se disenó una estrategia basada en la técnica de hemodinámica para vencer las obstrucciones de las arterias coronarias y lograr, mediante angioplastia de las estrecheces del seno coronario, un abordaje más preciso a un determinado vaso epicárdico preseleccionado. Se describe la técnica usada en la angioplastia del seno coronario para este propósito. The design of devices of cardiac stimulation in patients with dilated cardiomyopathy has become more sophisticated due to the increment of its implantation, devices that must satisfy the requirements for patients with anatomical changes that appear as a consequence of the cardiac dilation such as caliber modifications, course, length and number of coronary veins. Every time is more difficult to achieve the anatomical objectives, particularly the ideal place for the left ventricular stimulation electrode position in the coronary sinus. This situation limits in some cases the therapeutical benefit of this technique, occasionally facing to the need to submit the patient to thoracotomy for positioning the electrode in the left ventricle posterior-lateral epicardium. Thus, in order to shorten the times and morbidity and increment the implant success, we designed a strategy based on the hemodynamic technique to overcome coronary arteries obstruction and achieve through the angioplasty of the coronary sinus narrowness a more precise approach to a preselected determined epicardial vessel. We describe the technique used in the angioplasty of the coronary sinus for this purpose.
Complete minimal hypersurfaces in quaternionic hyperbolic space
Jaime Orjuela
Mathematics , 2012, DOI: 10.1007/s10711-013-9907-5
Abstract: We construct new examples of embedded, complete minimal hypersurfaces in quaternionc hyperbolic space and also some minimal foliations. We introduce fans an construct analytic deformations of bisectors.
Política pública y componentes sociodemográficos de la microempresa en el nuevo siglo: el caso de Colombia y México
Neira-Orjuela, Fernando;
Economía, sociedad y territorio , 2011,
Abstract: in latin america two countries have been characterized by receiving important international funds to foster and consolidate microenterprises: colombia and mexico. with said supports, both countries have sought to foment employment and social development. in this sense, the present article, which is part of a broader qualitative research on microenterprises in latin america, has as an objective to analyze the development of microenterprises in both countries and the socio-demographic characteristics of their labor force. for such end, in this research we make a brief historic account of the way and the conditions wherein public policies for the microenterprises appear and evolve in both countries; likewise, some of the socio-demographic characteristics of microenterprises in each country are analyzed.
Migración, remesas e indicadores económicos en la Comunidad Andina
Neira Orjuela, Fernando;
Latinoamérica. Revista de estudios Latinoamericanos , 2009,
Abstract: remittances have become an element of dynamic economies in latin america in general and the andina community in particular. one of the main manifestations of the importance of remittances is the weight in macro-economic indicators. to this extent, this article not only a characterization of international migration flows in the andina countries, but addresses in particular the way it has affected the macroeconomic indicators in the region by the resources of remittances.
LA COMPLEJA Y AMBIGUA repolitización de América Latina
Orjuela E,Luis Javier;
Colombia Internacional , 2007,
Abstract: in opposition to some scholars who maintain that analyzing latin america's current political situation using the concepts of left and right is inadequate, the author afirms that such concepts are not only pertinent for interpreting the region's situation, but also represent the region's current repolitization since that conceptual dichotomy expresses the confrontational character of politics. such confrontational character disappeared in the 80's and 90's due to three factors: authoritarian regimes, neoliberalism, and the left's ambiguous attitude towards its participation in the political democratic game and in elections.the current repolitization expresses itself in the left's revalorization of democracy, its rejection of neoliberal reforms and the anticapitalism of some of its sectors. on the other side, the ambiguity and complexity of such repolitization expresses itself in the hibridation of leftist politics into a radical, moderate, populist, and ethnic left, which characterizes some of the region's current political regimes.
Dinámica del Carbono en estanques de peces
Ladino-Orjuela,Guillermo;
ORINOQUIA , 2011,
Abstract: aquaculture ponds'carbon dynamicsare dominated by physical, chemical and biological transformations in feed and organic and inorganic fertilisation. increasedfish productionhas been associated with an increase incarbon inputin the form of fish-feed exceeding ponds'metabolic capacity,thereby leading to water quality deteriorating due toan accumulationof organic compounds. water quality is a major constraint in terms of increasedfish crop density. the most important carbon loss within aproduction system is associated with co2evaporation;this makes aquaculture ponds become carbon footprints instead of carbon sinks. phytoplankton is the major means of co2 retentionas it captures both that produced by the respiration of all organisms within a particularpond and within the atmosphere. aquaculture production systemsusually have a negativeorganic carbon balance; however,higher carbon recovery is possible but this involves adjusting management practiceand increasedresearch into the pertinent dynamics. feed, feedingpractices, the speciesbeing cultivated, water exchange, aeration, pond depth and the microorganisms living in a pondare factorswhich affect the biogeochemical carboncycle in aquaculture ponds.
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