ESTE ARTÍCULO REVISA DE MANERA CRÍTICA EL TRABAJO EMPÍRICO PRESENTADO POR RAMASWAMY, GATIGNON Y R... more ESTE ARTÍCULO REVISA DE MANERA CRÍTICA EL TRABAJO EMPÍRICO PRESENTADO POR RAMASWAMY, GATIGNON Y REIBSTEIN (1994), SOBRE COMPORTAMIENTO COMPETITIVO DE MERCADOTECNIA EN MERCADOS INDUSTRIALES. EL PLANTEAMIENTO ORIGINAL ANALIZA EL EFECTO DE LAS VARIABLES ESTRUCTURALES DEL MERCADO Y CARACTERÍSTICAS DEL PRODUCTO SOBRE DOS TIPOS DE COMPORTAMIENTO: VENGATIVO Y COOPERATIVO. EL PROPÓSITO DE ESTA REVISIÓN SOBRE LAS VARIABLES Y METODOLOGÍA ORIGINALES ES PROPONER NUEVAS LÍNEAS DE INVESTIGACIÓN A PARTIR DE LA MODIFICACIÓN E INCLUSIÓN DE VARIABLES. SE PROPONE CAMBIAR LA MEDIDA DE CONCENTRACIÓN DE MERCADO Y GRADO DE DIFERENCIACIÓN, INCLUYENDO ADEMÁS EL CRECIMIENTO DE CATEGORÍA DE PRODUCTO, GRADO DE INCERTIDUMBRE Y LA CAPACIDAD DE RESPUESTA DE LAS FIRMAS COMO NUEVAS VARIABLES. SE PROPONE EL USO DE UN ÍNDICE DE INEQUIDAD COMPETITIVA. ADEMÁS, SE RECOMIENDA REALIZAR ESTUDIOS EN OTROS SECTORES Y ANALIZAR EL COMPORTAMIENTO COMPETITIVO COMPLEJO POR SEPARADO.
Meconium periorchitis is uncommon. In the unborn child the peritoneum vaginal canal is open and, ... more Meconium periorchitis is uncommon. In the unborn child the peritoneum vaginal canal is open and, secondary to intestinal perforation due to any cause (intestinal atresia, volvulus, and others), meconium peritonitis occurs. The intestinal content reaches the scrotal vaginal cavity. Meconium peritonitis can heal spontaneously and without consequences. Calcified remnants of this event may remain in the peritoneal cavity and/or scrotum. In the newborn, a hydrocele and scrotal mass can be observed; the ultrasound will show a heterogeneous image with calcifications. Meconium periorchitis or meconium vaginalitis resolves spontaneously. The lack of awareness of this disease could lead to unnecessary surgery in the newborn. We present a 33 days old patient with a scrotal mass in whom surgery was performed with the pathological diagnosis of meconium periorchitis.
For over 200 years, fossils of bizarre extinct creatures have been described from the Americas th... more For over 200 years, fossils of bizarre extinct creatures have been described from the Americas that have ranged from giant ground sloths to the 'native' South American ungulates, groups of mammals that evolved in relative isolation on South America. Ground sloths belong to the South American xenarthrans, a group with modern although morphologically and ecologically very different representatives (anteaters, armadillos and sloths), which has been proposed to be one of the four main eutherian clades. Recently, proteomics analyses of bone collagen have recently been used to yield a molecular phylogeny for a range of mammals including the unusual…
Por varias décadas el sector floricultor colombiano ha contribuido a la generación de divisas y e... more Por varias décadas el sector floricultor colombiano ha contribuido a la generación de divisas y empleo. Recientemente, atraviesa por una difícil situación económica, marcada por pérdidas crecientes de un grupo también en aumento de productores. Existe también un porcentaje importante que continúan obteniendo ganancias en su negocio, auque a tasas bajas. El presente trabajo explora los factores que ayudan a
Laser induced breakdown plasmas are ``dirty'' events yielding a mixture of ionized specie... more Laser induced breakdown plasmas are ``dirty'' events yielding a mixture of ionized species, electrons, and non-ionized matter of various size. Molecular emissions have been detected in excited nanosecond plasmas microseconds after the ablation event. However, with these molecular signatures it is difficult to distinguish between native emissions and atmospheric recombination with respect to the sample probed. A time resolved study during and after the continuum of the plasma event produced from specific organic materials can yield a possible insight in identifying native molecular emission and recombination. In this study, a plasma was formed by interacting a femtosecond beam with Nitrobenzoic acid, Ammonium Nitrate, Benzylacetonitrile, Nitrophenol, and Phthalimide. Molecular spectral signatures of NO, OH+, CN, C2, and NH were monitored as a function of plasma lifetime, with a 50 nanosecond gate window, delineating a trend of growth and decay. Use of a buffer gas, Argon, has...
Biomédica : revista del Instituto Nacional de Salud, 2005
Daily cigarette smoking is associated with high morbidity and mortality in adults. This pattern o... more Daily cigarette smoking is associated with high morbidity and mortality in adults. This pattern of tobacco use is established during the early adolescence. Among adolescents, daily cigarette smoking is a strong predictor of illegal, addictive substance use. The prevalence of daily cigarette smoking is not known in Colombian adolescent middle-school students. To assess smoking prevalence, daily cigarette smoking and associated factors among middle school-students in Bucaramanga, northeast Colombia. An anonymous questionnaire concerning illegal and legal substance use was administered to a random sample of 2,586 students. The group mean age was 13.0 years; 54.9% was male; 32.0% was in sixth grade, 31.7% in seventh, 25.2% in eighth and 11.1% in ninth grade, with 67.1% enrolled in public schools. The prevalence of daily cigarette smoking lasting the month prior to the questionnaire was 3.8% (95% CI 2.7-4.9). Logistic regression showed a significant association between being the best fri...
ESTE ARTÍCULO REVISA DE MANERA CRÍTICA EL TRABAJO EMPÍRICO PRESENTADO POR RAMASWAMY, GATIGNON Y R... more ESTE ARTÍCULO REVISA DE MANERA CRÍTICA EL TRABAJO EMPÍRICO PRESENTADO POR RAMASWAMY, GATIGNON Y REIBSTEIN (1994), SOBRE COMPORTAMIENTO COMPETITIVO DE MERCADOTECNIA EN MERCADOS INDUSTRIALES. EL PLANTEAMIENTO ORIGINAL ANALIZA EL EFECTO DE LAS VARIABLES ESTRUCTURALES DEL MERCADO Y CARACTERÍSTICAS DEL PRODUCTO SOBRE DOS TIPOS DE COMPORTAMIENTO: VENGATIVO Y COOPERATIVO. EL PROPÓSITO DE ESTA REVISIÓN SOBRE LAS VARIABLES Y METODOLOGÍA ORIGINALES ES PROPONER NUEVAS LÍNEAS DE INVESTIGACIÓN A PARTIR DE LA MODIFICACIÓN E INCLUSIÓN DE VARIABLES. SE PROPONE CAMBIAR LA MEDIDA DE CONCENTRACIÓN DE MERCADO Y GRADO DE DIFERENCIACIÓN, INCLUYENDO ADEMÁS EL CRECIMIENTO DE CATEGORÍA DE PRODUCTO, GRADO DE INCERTIDUMBRE Y LA CAPACIDAD DE RESPUESTA DE LAS FIRMAS COMO NUEVAS VARIABLES. SE PROPONE EL USO DE UN ÍNDICE DE INEQUIDAD COMPETITIVA. ADEMÁS, SE RECOMIENDA REALIZAR ESTUDIOS EN OTROS SECTORES Y ANALIZAR EL COMPORTAMIENTO COMPETITIVO COMPLEJO POR SEPARADO.
Meconium periorchitis is uncommon. In the unborn child the peritoneum vaginal canal is open and, ... more Meconium periorchitis is uncommon. In the unborn child the peritoneum vaginal canal is open and, secondary to intestinal perforation due to any cause (intestinal atresia, volvulus, and others), meconium peritonitis occurs. The intestinal content reaches the scrotal vaginal cavity. Meconium peritonitis can heal spontaneously and without consequences. Calcified remnants of this event may remain in the peritoneal cavity and/or scrotum. In the newborn, a hydrocele and scrotal mass can be observed; the ultrasound will show a heterogeneous image with calcifications. Meconium periorchitis or meconium vaginalitis resolves spontaneously. The lack of awareness of this disease could lead to unnecessary surgery in the newborn. We present a 33 days old patient with a scrotal mass in whom surgery was performed with the pathological diagnosis of meconium periorchitis.
For over 200 years, fossils of bizarre extinct creatures have been described from the Americas th... more For over 200 years, fossils of bizarre extinct creatures have been described from the Americas that have ranged from giant ground sloths to the 'native' South American ungulates, groups of mammals that evolved in relative isolation on South America. Ground sloths belong to the South American xenarthrans, a group with modern although morphologically and ecologically very different representatives (anteaters, armadillos and sloths), which has been proposed to be one of the four main eutherian clades. Recently, proteomics analyses of bone collagen have recently been used to yield a molecular phylogeny for a range of mammals including the unusual…
Por varias décadas el sector floricultor colombiano ha contribuido a la generación de divisas y e... more Por varias décadas el sector floricultor colombiano ha contribuido a la generación de divisas y empleo. Recientemente, atraviesa por una difícil situación económica, marcada por pérdidas crecientes de un grupo también en aumento de productores. Existe también un porcentaje importante que continúan obteniendo ganancias en su negocio, auque a tasas bajas. El presente trabajo explora los factores que ayudan a
Laser induced breakdown plasmas are ``dirty'' events yielding a mixture of ionized specie... more Laser induced breakdown plasmas are ``dirty'' events yielding a mixture of ionized species, electrons, and non-ionized matter of various size. Molecular emissions have been detected in excited nanosecond plasmas microseconds after the ablation event. However, with these molecular signatures it is difficult to distinguish between native emissions and atmospheric recombination with respect to the sample probed. A time resolved study during and after the continuum of the plasma event produced from specific organic materials can yield a possible insight in identifying native molecular emission and recombination. In this study, a plasma was formed by interacting a femtosecond beam with Nitrobenzoic acid, Ammonium Nitrate, Benzylacetonitrile, Nitrophenol, and Phthalimide. Molecular spectral signatures of NO, OH+, CN, C2, and NH were monitored as a function of plasma lifetime, with a 50 nanosecond gate window, delineating a trend of growth and decay. Use of a buffer gas, Argon, has...
Biomédica : revista del Instituto Nacional de Salud, 2005
Daily cigarette smoking is associated with high morbidity and mortality in adults. This pattern o... more Daily cigarette smoking is associated with high morbidity and mortality in adults. This pattern of tobacco use is established during the early adolescence. Among adolescents, daily cigarette smoking is a strong predictor of illegal, addictive substance use. The prevalence of daily cigarette smoking is not known in Colombian adolescent middle-school students. To assess smoking prevalence, daily cigarette smoking and associated factors among middle school-students in Bucaramanga, northeast Colombia. An anonymous questionnaire concerning illegal and legal substance use was administered to a random sample of 2,586 students. The group mean age was 13.0 years; 54.9% was male; 32.0% was in sixth grade, 31.7% in seventh, 25.2% in eighth and 11.1% in ninth grade, with 67.1% enrolled in public schools. The prevalence of daily cigarette smoking lasting the month prior to the questionnaire was 3.8% (95% CI 2.7-4.9). Logistic regression showed a significant association between being the best fri...
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