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Search Results: 1 - 10 of 205041 matches for " Oscar Salazar Gaitán "
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Enabling Roaming in Heterogeneous Multi-Operator Wireless Networks
Oscar Salazar Gaitán,Philippe Martins,Jacques Demerjian,Samir Tohmé
Journal of Communications , 2007, DOI: 10.4304/jcm.2.4.18-28
Abstract: Next generation wireless networks will take advantage of the popularity and the data rates offered byunlicensed wireless networks to enhance cellular services. Nowadays, it is not surprising to see heterogeneous wireless networks coexisting on a daily basis i.e. UMTS, WiFi, and WiMAX. Unfortunately, technical issues and the lack of roaming agreements between network operators prevent interoperability. One of the goals of next generation wireless networks is to enable service mobility between heterogeneous wireless networks, thus we present in this article a SIP-based roaming architecture to enable service mobility in heterogeneous multi-operator wireless networks. Our objective is to establish mutual trust between cellular network operators and unlicensed wireless networks through a efficient SLA monitoring and enforcement and brokerbased access control. All this, with minimal changes in current wireless network architectures.
Estar críticamente enfermo significa no ser capaz y no poder decidir
Beltrán Salazar,Oscar;
Index de Enfermería , 2008, DOI: 10.4321/S1132-12962008000200003
Abstract: objective: to describe the meaning for the critically sick patients hospitalized in icu of the experience of being dependent of nurses for meting needs. methodology: phenomenological focused research carried out in medellín in 2006; it included nine adults among 24 and 80 years who were critically sick and hospitalized in icu. the interview in depth was used for gathering information. the data were analyzed according to the outline proposed by cohen, kahan and steeves. results: the dependency on other people to act and decide, the suffering and the pain influence in the hardness of the experience of suffering a serious illness. discussion: not to be capable of meeting the own necessities and making decisions make the experience of suffering a serious illness "hard and difficult". conclusion: the dependence of patients with a serious illness should not be assumed by nurses but rather it should be evaluated in each case, as the same as the responses to this dependence to assure the respect for sick people′ rights.
Estar críticamente enfermo significa no ser capaz y no poder decidir Undergoing a critical sickness means not to be capable and not to be able to decide
Oscar Beltrán Salazar
Index de Enfermería , 2008,
Abstract: Objetivo: Describir el significado para los pacientes críticamente enfermos hospitalizados en UCI de la experiencia de ser dependientes de los enfermeros para la satisfacción de las necesidades. Metodología: Investigación con enfoque fenomenológico realizada en Medellín en 2006; incluyó a nueve personas adultas entre 24 y 80 a os que estuvieron críticamente enfermos y hospitalizados en UCI. La entrevista en profundidad se utilizó para la recolección de información. Los datos se analizaron según el esquema propuesto por Cohen, Kahan y Steeves. Resultados: Depender de otras personas para actuar y para decidir, el sufrimiento y el dolor influyen en la dureza de la experiencia de padecer una enfermedad grave. Discusión: No ser capaz de autosatisfacer las necesidades propias y no poder tomar decisiones contribuyen para que la experiencia de padecer una enfermedad grave sea "dura y difícil". Conclusión: la dependencia de los pacientes que padecen una enfermedad grave no debe ser asumida por los enfermeros sino que debe evaluarse en cada caso, lo mismo que las respuestas a dicha dependencia para asegurar el respeto por los derechos de las personas enfermas. Objective: To describe the meaning for the critically sick patients hospitalized in ICU of the experience of being dependent of nurses for meting needs. Methodology: Phenomenological focused research carried out in Medellín in 2006; it included nine adults among 24 and 80 years who were critically sick and hospitalized in ICU. The interview in depth was used for gathering information. The data were analyzed according to the outline proposed by Cohen, Kahan and Steeves. Results: The dependency on other people to act and decide, the suffering and the pain influence in the hardness of the experience of suffering a serious illness. Discussion: Not to be capable of meeting the own necessities and making decisions make the experience of suffering a serious illness "hard and difficult". Conclusion: the dependence of patients with a serious illness should not be assumed by nurses but rather it should be evaluated in each case, as the same as the responses to this dependence to assure the respect for sick people′ rights.
Rechazo al cuidado de la salud por motivaciones del paciente
Beltrán Salazar,Oscar Alberto;
Investigación y Educación en Enfermería , 2010,
Abstract: objective. to describe the meaning for the patients of the health care rejection.methodology. qualitative study with phenomenological focus performed in medellin (colombia) between 2008 and 2009. it included 12 hospitalized adults. the in depth interview was used to collect the information. data were analyzed according to the cohen, kahan and steeves proposed scheme. results. fear, suffering, dependency as well as the "bad reputation" of professionals, institutions or procedures contribute to the answer to care rejection. patients reject the disease because of pain and suffering. knowledge plays a double role in health care because it helps to accept or reject care and promote patients' acceptance and satisfaction. conclusion. rejection is a patient decision answering to situations linked to the disease, knowledge and nurses' behaviors should be taken into account by the nurses.
Tiempo libre al aire libre. Prácticas sociales, espacio público y naturaleza en el Parque Nacional Enrique Olaya Herrera (1938-1948)
Salazar Arenas,Oscar Iván;
Historia Crítica , 2007,
Abstract: the growth of bogotá during the 20th century was tied to process of modernizing urban space as well as the customs, social practices and mentality of the public. in order to understand the meaning of parks in the transformation of the city, this article examines the relationship between the state, elites and citizens in the public space of the enrique olaya herrera national park. reviewing the early years of this park (1938-1948) reveals two important notions regarding urban parks in bogotá: first, although they were part of a modernization project directed by local elites, these parks took on a life of their own once they were opened to the public. second, there was a gap between the concept that planners had of the city and the urban practices of the people who used them. this gap shows that the public’s relation with urban space is dynamic and that their daily practices can affect ideas and hegemonic discourses.
Tiempo al aire libre. Prácticas sociales, espacio público y naturaleza en el Parque Nacional Enrique Herrera *
Oscar Iván Salazar Arenas
Historia Crítica , 2007,
Abstract: The growth of Bogotá during the 20th century was tied to process of modernizing urban space as well as the customs, social practices and mentality of the public. In order to understand the meaning of parks in the transformation of the city, this article examines the relationship between the state, elites and citizens in the public space of the Enrique Olaya Herrera National Park. Reviewing the early years of this park (1938-1948) reveals two important notions regarding urban parks in Bogotá: First, although they were part of a modernization project directed by local elites, these parks took on a life of their own once they were opened to the public. Second, there was a gap between the concept that planners had of the city and the urban practices of the people who used them. This gap shows that the public's relation with urban space is dynamic and that their daily practices can affect ideas and hegemonic discourses.
Rechazo al cuidado de la salud por motivaciones del paciente Rejei o ao cuidado da saúde por motiva es do paciente Health care rejection due to patient motivations
Oscar Alberto Beltrán Salazar
Investigación y Educación en Enfermería , 2010,
Abstract: Objetivo. Describir el significado que tiene para los pacientes del rechazo al cuidado de la salud. Metodología. Investigación cualitativa con enfoque fenomenológico realizada en Medellín (Colombia) entre 2008 y 2009. Incluyó a 12 adultos hospitalizados. La entrevista en profundidad se utilizó para la recolección de información. Los datos se analizaron según el esquema propuesto por Cohen, Kahan y Steeves. Resultados. El temor, el sufrimiento, la dependencia así como el desconocimiento y la "mala fama" de profesionales, instituciones o procedimientos contribuyen a la respuesta de rechazo al cuidado. Los pacientes rechazan la enfermedad por el dolor y el sufrimiento. El conocimiento juega un doble papel en el cuidado de la salud porque ayuda a aceptar o rechazar el cuidado y a promover aceptación y satisfacción de los pacientes. Conclusión. El rechazo es una decisión de los pacientes en respuesta a situaciones relacionadas con la enfermedad, el conocimiento y los comportamientos de los enfermeros y debe ser tenido en cuenta por los enfermeros. Objetivo. descrever o significado que tem para os pacientes da rejei o ao cuidado da saúde. Metodologia. investiga o qualitativa com enfoque fenomenológico realizada em Medellín (Col mbia) entre 2008 e 2009. Incluiu a 12 adultos hospitalizados. A entrevista em profundidade se utilizou para recolher informa o. Os dados se analisaram segundo o esquema proposto por Cohen, Kahan e Steeves. Resultados. o temor, o sofrimento, a dependência bem como o desconhecimento e a "má fama" de profissionais, institui es ou procedimentos contribuem à resposta de rejei o ao cuidado. Os pacientes recusam a doen a pela dor e o sofrimento. O conhecimento joga um duplo papel no cuidado da saúde porque ajuda a aceitar ou recusar o cuidado e a promover aceita o e satisfa o dos pacientes. Conclus o. A rejei o é uma decis o dos pacientes em resposta a situa es relacionadas com a doen a, o conhecimento e os comportamentos dos enfermeiros e deve ser tido em conta pelos enfermeiros. Objective. To describe the meaning for the patients of the health care rejection.Methodology. Qualitative study with phenomenological focus performed in Medellin (Colombia) between 2008 and 2009. It included 12 hospitalized adults. The in depth interview was used to collect the information. Data were analyzed according to the Cohen, Kahan and Steeves proposed scheme. Results. Fear, suffering, dependency as well as the "bad reputation" of professionals, institutions or procedures contribute to the answer to care rejection. Patients reject the disease because
An Artificial Neural Network Model to Analyze Maize Price Behavior in Mexico  [PDF]
Raquel Salazar Moreno, Oscar Zerecero Salazar
Applied Mathematics (AM) , 2018, DOI: 10.4236/am.2018.95034
Abstract: Mexican producers were supported by the Government from 1993-2013 through the PROCAMPO (support program, direct subsidy from the federal government), in order to keep the prices stable. The tool used to analyze the basic products price behavior was Artificial Neural Network (ANN) models. Data from the period 1980 to 2014 was available, and two ANN models were implemented, one including only internal prices of related products and the second takes into account also the international maize price. The purpose of this paper was to analyze the impact of internal related products and international maize price on the behavior of internal maize price. Both models demonstrated the powerful of the ANN for prediction of the maize price 3 and 5 years ahead. Also, a sensitivity analysis was performed using Garson’s algorithm, through which was demonstrated that rice, safflower and sorghum are corn’s complementary products. The rice price was the variable with a major positive impact on the national corn price. On the other hand, wheat, soybean and barley behave as corn’s substitute products, with wheat price being the variable with major impact on the corn price. Including the international corn price improves the model performance, besides there was a negative sensitivity between the international and national corn price; this behavior is explained by the fact that during PROCAMPO existence, the national prices were forced to be stable while the international maize price was increasing. Finally, this study showed the application of the ANN models in a particular product price behavior, with the possibility of being used in the decision making process for the application of subsidies to the agricultural producers in public policies.
Efecto de la localización del electrodo ventricular derecho (tracto de salida vs. ápex) sobre la sincronía ventricular mecánica, en pacientes sometidos a terapia de implante de marcapaso cardiaco
Rincón,Oscar S; Sáenz,Luis C; Salazar,Gabriel; Hernández,Edgar;
Revista Colombiana de Cardiología , 2008,
Abstract: objective: to assess in depth the effect of ventricular stimulation from the right ventricular outflow tract and the apex on mechanical ventricular synchrony. materials and methods: cohort analytical study. 20 patients with indication of definitive pacemaker indication underwent transthoracic echocardiogram before and after pacemaker implant with electrode implantation in the right ventricular outflow tract and in the apex (10 patients in each group). there was no structural cardiopathy, ejection fraction was > 50%, qrs and av conduction were normal. mechanical ventricular asynchrony (m mode and tissue doppler) and implant and device parameters were evaluated. statistical analysis: results are given as mean values, standard deviation or percentages. continuous variables were compared using chi-square test and anova. a p <0.05 value was considered statistically significant. results: in five patients (25%) a pre-implant ventricular asynchrony was found; in seven (70%) ventricular asynchrony post-implant in the right ventricle outflow tract and in 5 (50%) in the apex. mean interventricular pot-implant delay was 21,6 ms in the right ventricular outflow tract and 11,5 ms in the apex (p = 0,8); mean septal to lateral wall delay was 73 ms in the right ventricular outflow tract and 26 ms in the apex (p = 0,8). qrs post-implant delay was 134 ms in the right ventricular outflow tract and 140 ms in the apex (p = 0,1). no differences between implant parameters and device programming were found. conclusions: presence of ventricular asynchrony was evidenced in patients with normal qrs and structurally healthy heart. ventricular stimulation with pacemaker from the apex or the right ventricular outflow tract suggests acute ventricular asynchrony at least in 60% of the cases, without statistically significant difference between both groups.
Efecto de la localización del electrodo ventricular derecho (tracto de salida vs. ápex) sobre la sincronía ventricular mecánica, en pacientes sometidos a terapia de implante de marcapaso cardiaco Effect of right ventricular electrode location (outflow tract vs. apex) on mechanical ventricular synchrony in patients that underwent pacemaker implant therapy
Oscar S Rincón,Luis C Sáenz,Gabriel Salazar,Edgar Hernández
Revista Colombiana de Cardiología , 2008,
Abstract: Objetivo: evaluar a profundidad el efecto de la estimulación ventricular desde el tracto de salida del ventrículo derecho y el ápex, sobre la sincronía ventricular mecánica. Materiales y métodos: estudio analítico de cohorte, en el que se realizó ecocardiograma transtorácico pre y post implante de marcapaso a 20 pacientes (diez por cada grupo) con indicación de marcapaso definitivo, con implante del electrodo en el tracto de salida del ventrículo derecho y el ápex, sin cardiopatía estructural, fracción de eyección > 50%; QRS y conducción aurículo-ventricular normal, con el fin de evaluar la asincronía ventricular mecánica (modo M y Doppler tisular) y los parámetros de implante y programación del dispositivo. Análisis estadístico: los resultados se presentan como promedios, desviación estándar o porcentajes. Las variables continuas se compararon utilizando prueba Chi cuadrado y ANOVA. Se consideró como estadísticamente significativa una p < 0,05. Resultados: en cinco pacientes (25%), se encontró asincronía ventricular pre implante, en siete (70%) asincronía ventricular post implante en el tracto de salida del ventrículo derecho y en cinco (50%) en el ápex. El promedio del retraso interventricular post implante fue de 21,6 ms en el tracto de salida del ventrículo derecho y de 11,5 ms en el ápex (p=0,8). El promedio de retraso septum a pared lateral fue de 73 ms en el tracto de salida del ventrículo derecho y de 26 ms en el ápex (p=0,8). El del QRS post implante fue de 134 ms en el tracto de salida del ventrículo derecho y de 140 ms en el ápex (p=0,1). No hubo diferencias en parámetros de implante y programación del dispositivo. Conclusiones: se evidenció presencia de asincronía ventricular en pacientes con QRS normal y corazón con estructura sana. La estimulación ventricular con marcapaso desde el ápex o el tracto de salida del ventrículo derecho, sugiere asincronía ventricular aguda al menos en 60% de los casos, sin diferencia estadísticamente significativa entre ambos grupos. Objective: to assess in depth the effect of ventricular stimulation from the right ventricular outflow tract and the apex on mechanical ventricular synchrony. Materials and Methods: cohort analytical study. 20 patients with indication of definitive pacemaker indication underwent transthoracic echocardiogram before and after pacemaker implant with electrode implantation in the right ventricular outflow tract and in the apex (10 patients in each group). There was no structural cardiopathy, ejection fraction was > 50%, QRS and AV conduction were normal. Mechanical ventricular asynchron
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