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Search Results: 1 - 10 of 198940 matches for " Germán Carvajal "
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El discurso tecnológico en la Grecia antigua. The Technological Speech in the Ancient Greece.
Germán Carvajal Ahumada
HYBRIS : Revista de Filsofía , 2013,
Abstract: El presente escrito pretende ser un corto estudio en relación con el concepto griego antiguo de tecnología. La tesis fundamental que lo anima es que la palabra τεχνολογ α [tecnología], en el contexto griego antiguo, menta un concepto cuya plenitud objetiva no ha sido desarrollada, en su complejidad, por los modernos estudios sobre la cultura griega, los cuales se han centrado, eso sí, bastante en el estudio del término τ χνη, equivalente a técnica. Se examinan en este ensayo cinco autores entre el siglo IV a. C. y el siglo II d. C. Este escrito se divide en tres partes, la primera relativa a un examen del método dialéctico del Fedro de Platón, la segunda a una comprensión de la tecnología como modelo discurso; y la tercera a una comprensión de la tecnología como una relación entre las técnicas sostenida por el mentado modelo discursivo This paper aims to be a brief study on the ancient Greek concept of technology. The thesis that props it lies on the fact that the word τεχνολογ α [technology], in the ancient Greek context, names a concept whose complexity has not been studied deeply in the modern times. The contemporary studies has been focused well on the word τ χνη [technique]. Five authors, since the IV century b c., up to the II century a. d, are studied. This paper is divided into three pieces: the first one is devoted to the analysis of the dialectical method in Plato′s Phaedrus; the second one is devoted to interpret technology as a discursive model; and the third one to technology as a relationship, between the techniques, sustained by the mentioned discursive model
Observaciones historiográficas sobre el dise o de una teoría general de la Tecnología: Aristóteles, Beckmann, Marx y Kuhn
Germán Carvajal
Revista Observaciones Filosóficas , 2011,
Abstract: This paper aims to point out two ways of the concept of technology: one way, imaginary, linked to the instrument, the other one, real, linked to thought. But the second one is vanished behind the first, because the first is considered as worthy for social development; on the contrary the second, lost, is deeply rooted into politics and ethics.
La entrevista motivacional en adicciones
Torres Carvajal,Germán Alexánder;
Revista Colombiana de Psiquiatría , 2010,
Abstract: introduction: in the last 15 years, motivational interviewing (mi) has become one of the most popular and effective methods to treat drug addictions. its efficacy is supported by numerous investigations. objective: to review the main theoretical characteristics of mi and clinical evidence available. method: we reviewed the medical literature on the subject, using the medline database. results: mi is a patient-centered intervention, with proven effectiveness that takes advantage of the ambivalence toward a problem, and through reflective listening and some targeted interventions, achieve resolution of the ambivalence, leading to greater willingness to change the addictive behavior in the patient. conclusions: mi is an effective tool in the management of drug addicted patients by recovering therapeutic areas and encouraging the process of change. given its characteristics, mi could be a useful tool for the treatment of drug addicts in the colombian context.
La entrevista motivacional en adicciones Motivational Interviewing in Addictions
Germán Alexánder Torres Carvajal
Revista Colombiana de Psiquiatría , 2010,
Abstract: Introducción: En los últimos 15 a os, la entrevista motivacional se ha convertido en uno de los métodos más populares y efectivos en el manejo de las adicciones, hecho sustentado por numerosas investigaciones. Objetivo: Llevar a cabo una revisión teórica de las principales características de la entrevista motivacional y la evidencia clínica disponible. Método: Revisión de la literatura médica publicada sobre el tema, utilizando la base de datos MedLine. Resultados: La entrevista motivacional es un tipo de intervención centrado en el paciente, ampliamente documentado e investigado y con efectividad demostrada, que aprovecha la ambivalencia frente a una problemática y, por medio de una escucha reflexiva y algunas intervenciones puntuales, intenta lograr su resolución, generando una mayor disposición al cambio del comportamiento lesivo en el paciente. Conclusión: La entrevista motivacional es una herramienta efectiva en el manejo de los pacientes, que recupera espacios terapéuticos y favorece el proceso de cambio. Podría ser una herramienta útil en el ámbito colombiano, dadas sus características. Introduction: In the last 15 years, Motivational Interviewing (MI) has become one of the most popular and effective methods to treat drug addictions. Its efficacy is supported by numerous investigations. Objective: To review the main theoretical characteristics of MI and clinical evidence available. Method: We reviewed the medical literature on the subject, using the Medline database. Results: MI is a patient-centered intervention, with proven effectiveness that takes advantage of the ambivalence toward a problem, and through reflective listening and some targeted interventions, achieve resolution of the ambivalence, leading to greater willingness to change the addictive behavior in the patient. Conclusions: MI is an effective tool in the management of drug addicted patients by recovering therapeutic areas and encouraging the process of change. Given its characteristics, MI could be a useful tool for the treatment of drug addicts in the Colombian context.
Visual Anosognosia (Anton-Babinski Syndrome): Report of Two Cases Associated with Ischemic Cerebrovascular Disease  [PDF]
Juan José Romero Carvajal, Augusto Alejandro Arias Cárdenas, Germán Zamora Pazmi?o, Patricio Abad Herrera
Journal of Behavioral and Brain Science (JBBS) , 2012, DOI: 10.4236/jbbs.2012.23045
Abstract: Visual anosognosia or Anton-Babinski syndrome is a rare neurological condition related to cortical blindness. The patients deny their blindness and affirm adamantly that they are capable of seeing. The clinical presentation includes confabulations and sometimes confusional states. In this article we report two patients with anosognosia related to ischemic stroke in two different sets of etiology and pathogenesis. We describe the major clinical manifestations of this syndrome and review the current medical literature. Two patients were identified, a 96-year-old male with visual anosognosia secondary to a right posterior cerebral artery thrombosis, and a 56-year-old female with the same syndrome but related to central nervous system angiitis in relation with multiple sclerosis and Hashimoto’s thyroiditis. Visual anosognosia or Anton-Babinski syndrome is a rare neurological condition, however the ischemic vascular cerebral disease is a frequent etiology. We believe that this is the first report of this syndrome in relation to angiitis with a clear autoimmune pathogenesis.
Evidencias de cambio climático en Colombia: tendencias y cambios de fase y amplitud de los ciclos anual y semianual
Pérez, Carlos,Poveda, Germán,Mesa, Oscar,Carvajal, Luis
Bulletin de l'Institut Francais d'études Andines , 1998,
Abstract: éVIDENCES DE CHANGEMENT CLIMATIQUE EN COLOMBIE : TENDANCES, CHANGEMENTS DE PHASE ET AMPLITUDE DES CYCLES ANNUELS ET SEMI-ANNUELS. On a utilisé plusieurs techniques d analyse pour mettre en évidence des changements climatiques en Colombie. On a montré une nette tendance au réchauffement des températures minimales et moyennes. Les chroniques de points de rosée et de pression de vapeur d eau indiquent une augmentation de l humidité de l atmosphère qui va de pair avec un réchauffement. Par contre les séries de précipitations ne montrent pas de tendance bien définie. Les débits des principaux bassins ont tendance à diminuer, ce qui pourrait être relié aux variations de l évapotranspiration. Une analyse par démodulation complexe confirme ces tendances dans plusieurs parties de la Colombie. Ces résultats pourraient être d une grande utilité pour l estimation des ressources hydriques, la planification et la gestion des systèmes hydrauliques. Se implementan varias técnicas estadísticas de análisis para identificar se ales de cambio climático en registros hidrológicos y climáticos de Colombia. Hay clara tendencia de calentamiento que se observa en las series de temperaturas mínimas y que concuerda con las series de temperaturas medias. Las series de punto de rocío y presión de vapor indican un aumento en la humedad atmosférica. Esta tendencia coincide con el calentamiento. Las series de precipitación no muestran se al clara de cambio climático. Las principales cuencas presentan tendencia decreciente en los caudales. Los resultados de Demodulación Compleja ratifican los resultados descritos anteriormente y permiten establecer corrimientos en las fases de los ciclos anual y semianual de diversas variables climáticas en Colombia. Estos resultados tienen implicaciones fundamentales para la disponibilidad del recurso hídrico y para el planeamiento y manejo de sistemas hidráulicos. EVIDENCES OF CLIMATE CHANGE IN COLOMBIA: TRENDS AND PHASE AN AMPLITUDE CHANGES OF ANNUAL AND SEMIANNUAL CYCLES. Several statistical techniques and tests are performed trying to detect signals of climatic change in hydroclimatic records of Colombia, including identifying possible changes in the mean and the variance of the records, as well as detection of trends and non-homogeneities of the records. Results confirm positive trends in minimum and mean temperature records throughout Colombia. Precipitation series exhibit no clear spatial signal. Most important rivers basins appear to exhibit decreasing trends in discharge. Deforestation and changes in evapotranspiration could account for the ob
Bioasimilación de oligoelementos en el camarón de río, Macrobrachium amazonicum (crustacea, palaemonidae)
Carvajal,Yolimar; Orozco,Wuili; Amaya,Jorge; Matute,Saida; Merú Marcó,Lué; Poleo,Germán;
Bioagro , 2009,
Abstract: the river prawn, macrobrachium amazonicum, presents characteristics that make it potentially desirable for culture. the objective of this study was to evaluate its proximal analysis and bioaccumulation of the elements fe, cu, zn and se. in order to analyze its bioaccumulation capability, 300 juvenile individuals were distributed into 15 20-l aquaria and five treatments with three repetitions were evaluated in a completely randomized block design. a control group of prawns was feed with commercial fish food. prawns in the experimental treatments were feed with fish food mixed separately with each one of the elements (fe, cu, zn, se).the concentration level being twice the nutritional requirements for similar species. after 20 days prawns were sacrificed to split the exoskeleton from the muscular tissue for later analysis. the control group showed a content of 58.1 % protein, 11.0 % fats, 8.6 % carbohydrate, and 0,15 % phosphorus. significant differences were found within the muscular tissue when compared the control group vs. prawns fed with food with copper (130 vs. 170 mg·kg-1) and zinc (70 vs. 80 mg·kg-1). the differences were higher when element concentrations were evaluated in the exoskeleton (140 vs. 200 mg·kg-1 for copper, and 90 vs. 100 mg·kg-1 for zinc). this study showed that this prawn represents a rich source of oligoelements when compared with other foods for human consumption, and has some capability for bioaccumulation of copper and zinc, especially at the exoskeleton tissue.
On classification improvement by using an approximate discriminative hidden Markov model
Carvajal- González,Johanna; Sarria-Paja,Milton; Castellanos- Dom,Germán;
Revista Facultad de Ingeniería Universidad de Antioquia , 2010,
Abstract: hmms are statistical models used in a very successful and effective form in speech recognition. however, hmm is a general model to describe the dynamic of stochastic processes; therefore it can be applied to a huge variety of biomedical signals. usually, the hmm parameters are estimated by means of mle (maximum likelihood estimation) criterion. nevertheless, mle has as disadvantage that the distribution it is wanted to adjust is the distribution of each class, besides the models and/or data of other classes do not participate in the parameter re-estimation, as a result, the ml criterion is not directly related to reduce the error rate; it has led to many researchers to choice other training techniques known as discriminative training, including maximum mutual information (mmi) estimation. in this work, we carry out an eeg classification in order to compare hmm trained with both ml estimation and mmi estimation. the obtained results show a better performance in all database used.
Dissemination of Clonal Groups of Brachyspira hyodysenteriae amongst Pig Farms in Spain, and Their Relationships to Isolates from Other Countries
Jesús Osorio, Ana Carvajal, Germán Naharro, Tom La, Nyree D. Phillips, Pedro Rubio, David J. Hampson
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0039082
Abstract: Background Swine dysentery (SD) is a widespread diarrhoeal disease of pigs caused by infection of the large intestine with the anaerobic intestinal spirochaete Brachyspira hyodysenteriae. Understanding the dynamics of SD, and hence being able to develop more effective measures to counter its spread, depends on the ability to characterise B. hyodysenteriae variants and trace relationships of epidemic strains. Methodology/Principal Findings A collection of 51 Spanish and 1 Portuguese B. hyodysenteriae isolates was examined using a multilocus sequence typing (MLST) scheme based on the sequences of seven conserved genomic loci. The isolates were allocated to 10 sequence types (STs) in three major groups of descent. Isolates in four of the STs were widely distributed in farms around Spain. One farm was infected with isolates from more than one ST. Sequence data obtained from PubMLST for 111 other B. hyodysenteriae strains from other countries then were included in the analysis. Two of the predominant STs that were found in Spain also were present in other European countries. The 73 STs were arranged in eleven clonal complexes (Cc) containing between 2 and 26 isolates. A population snapshot based on amino acid types (AATs) placed 75% of the isolates from 32 of the 48 AATs into one major cluster. The founder type AAT9 included 22 isolates from 10 STs that were recovered in Spain, Australia, Sweden, Germany, Belgium, the UK, Canada, and the USA. Conclusions/Significance This MLST scheme provided sufficient resolution power to unambiguously characterise B. hyodysenteriae isolates, and can be recommended as a routine typing tool that rapidly enables comparisons of isolates. Using this method it was shown that some of the main genetic lineages of B. hyodysenteriae in Spain also occurred in other countries, providing further evidence for international transmission. Finally, analysis of AATs appeared useful for deducing putative ancestral relationships between strains.
Device-associated infections in a Colombian neonatal intensive care unit
Contreras-Cuellar,Germán A.; Leal-Castro,Aura L.; Prieto,Reinaldo; Carvajal-Hermida,Alba L.;
Revista de Salud Pública , 2007, DOI: 10.1590/S0124-00642007000300012
Abstract: objective the present study was aimed at determining device-associated infection rates, device use rates and the microbiologic profile of nosocomial infections in a tertiary neonatal intensive care unit (icu) in bogotá, colombia. methods prospective nosocomial infection surveillance was implemented in a neonatal intensive care unit for 11 months in line with the high risk nursery component of the colombian nosocomial infection surveillance programme. patient-days, length of stay, device use rates and device-associated nosocomial infection rates were calculated. results 1 998 device days were observed among 2 890 patient days during the 11 months' surveillance. central venous catheter-related bloodstream infection was the most common device-associated infection for all birth-weight categories. 69,2 % and 100 % of all coagulase negative staphylococci and staphylococcus aureus infections were methicillin resistant strains and all gram negative rods were susceptible to third generation cephalosporins, carbapenems, ciprofloxacin and piperacillin-tazobactam. device-associated infection and device use rates in the icu were higher than colombian nosocomial infection surveillance reports for october 2004 and reports from colombia and other latin-american countries. conclusions this surveillance identified blood-stream infection as being the most common infection in the icu in question. efforts should thus be directed at establishing suitable infection-control practices.
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