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匹配条件: “Julián Chaverri Polini” ,找到相关结果约197825条。
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EFECTO EN EL íNDICE DE DISCAPACIDAD EN PACIENTES ADULTOS CON VéRTIGO PAROXíSTICO POSICIONAL BENIGNO MEDIANTE LA REHABILITACIóN VESTIBULAR CON MOVIMIENTO HUMANO
Sofía Chaverri Flores,Julián Chaverri Polini,Andrea Mora Campos
Revista en Ciencias del Movimiento Humano y Salud , 2007,
Abstract: Propósito: determinar el efecto en el índice de discapacidad en pacientes adultos con vértigo paroxístico posicional benigno mediante la RV con el movimiento humano. Sujetos: seis sujetos, con una edad promedio de 49.5 ± 14.22 a os, que se han diagnosticado previamente, por medio de un especialista en otorrinolaringología, con vértigo paroxístico posicional benigno. Instrumentos: se utilizó el Dizziness Handicap Inventory, cuestionario para determinar el impacto en la calidad de vida en pacientes con dicha patología (Ceballos y Vargas, 2004). Procedimiento: se les sometió a una terapia vestibular durante cuatro semanas con ejercicios de habituación y equilibrio, en una modalidad semipresencial. Se realizaron dos mediciones, antes y después de terapia vestibular, y se valoró si hubo alguna mejoría en las dimensiones física, funcional y emocional. Análisis estadístico: se aplicó estadística descriptiva y una “t-Student” de medidas repetidas para analizar los resultados obtenidos. Resultados: hubo diferencias estadísticamente significativas en la dimensión física entre el pretest (19.33 ± 4.67 puntos) y el postest (13 ± 7.24 puntos) (t = 2.65; p < 0.05). Por otro lado, no hubo diferencias significativas en las dimensiones funcional (t= 2.44; p>0.05), emocional (t= 2.37; p>0.05) y general (t= 2.55; p>0.05). Conclusión: la terapia vestibular con movimiento humano semipresencial mejoró el índice de discapacidad por vértigo (dimensión física) de sujetos con VPPB.
Anidación de la tortuga Dermochelys coriacea (Testudines: Dermochelyidae) en playa Gandoca, Costa Rica (1990 a 1997)
Chacón Chaverri,Didiher;
Revista de Biología Tropical , 1999,
Abstract: the nesting of the leatherback sea turtle was studied in gandoca beach, an important nesting beach on the southeastern caribbean coast of costa rica, in the gandoca/manzanillo national wildlife refuge. nesting was recorded from 1990 to 1997 (each february through july). nesting peaked in april and may (depending on the year); 16 biological paramenters were recorded and part of the rookery was tagged with monel tags. during this period 1 045 females were studied and 3 484 nests were recorded; 534 nests was the yearly mean, (range 226-1 135), 20.8 % of the nests were relocated to hatcheries, as a conservation effort to prevent loss of nests. mean curve carapace length was 154.65 cm and width 112.83 cm. mean normal number of eggs/nest was 79.28 and 35 yolkless. each turtle laid an average of 2.5 nests per season with an internesting interval of 9 days. in 1997, 39% of the nesting females had been previously tagged in gandoca beach and a few also in colombia (urabá gulf), pacuare and tortuguero (costa rica). poaching activity, beach debris and extensive erosion represent the main hazards that are leading to a decline of the sea turtles in gandoca.
Anidación de la tortuga Dermochelys coriacea (Testudines: Dermochelyidae) en playa Gandoca, Costa Rica (1990 a 1997)
Didiher Chacón Chaverri
Revista de Biología Tropical , 1999,
Abstract: La anidación de la tortuga baula fue estudiada en playa Gandoca, una importante playa de anidación de tortugas marinas localizada al sureste de la costa Caribe a de Costa Rica, dentro de los límites del Refugio Nacional de Vida Silvestre Gandoca/Manzanillo (82° 37' O, 09° 37' N). Entre 1990 y 1997, se desarrollaron campa as de observación de la anidación entre los meses de febrero a julio de cada a o; 16 variables de la anidación fueron anotadas y una parte de la colonia fue marcada con marcas monel y 3 484 nidos fueron encontrados; durante este periodo se depositaron un promedio de 534 nidos por temporada, 1,135 nidos fue el máximo de anidación anual, mientras que 226 nidos fue el mínimo, el 20.8% de los nidos fueron relocalizados en los viveros. El promedio de la longitud curva del caparazón de las hembras fue de 154.65 cm y el promedio del ancho curvo del caparazón fue de 112.83 cm. Las observaciones mostraron que el promedio de huevos normales para este periodo fue de 79.28, mientras que el promedio de huevos vanos fue de 35. La recolección ilegal de huevos, la basura sobre la playa y la erosión intensiva son parte de los problemas más importantes que están causando el declive de las tortugas en Gandoca. The nesting of the leatherback sea turtle was studied in Gandoca Beach, an important nesting beach on the southeastern Caribbean coast of Costa Rica, in the Gandoca/Manzanillo National Wildlife Refuge. Nesting was recorded from 1990 to 1997 (each February through July). Nesting peaked in April and May (depending on the year); 16 biological paramenters were recorded and part of the rookery was tagged with monel tags. During this period 1 045 females were studied and 3 484 nests were recorded; 534 nests was the yearly mean, (range 226-1 135), 20.8 % of the nests were relocated to hatcheries, as a conservation effort to prevent loss of nests. Mean curve carapace length was 154.65 cm and width 112.83 cm. Mean normal number of eggs/nest was 79.28 and 35 yolkless. Each turtle laid an average of 2.5 nests per season with an internesting interval of 9 days. In 1997, 39% of the nesting females had been previously tagged in Gandoca Beach and a few also in Colombia (Urabá Gulf), Pacuare and Tortuguero (Costa Rica). Poaching activity, beach debris and extensive erosion represent the main hazards that are leading to a decline of the sea turtles in Gandoca.
Determining Critical Submergence in Tanks by Means of Reynolds & Weber Numbers  [PDF]
Carlos Julián Gavilán Moreno
World Journal of Engineering and Technology (WJET) , 2014, DOI: 10.4236/wjet.2014.23024
Abstract: Critical submergence in pumping systems can be determined using a number of calculations, all of which result from heterogeneous geometries based on water. The most widely spread critical submergence formula is that of the Hydraulic Institute. A study, carried out in Germany, looked at eight different formulations used to calculate critical submergence, comparing their results with those of a hydraulic model test. The conclusion is that the simplest models, overestimate the critical submergence. Similarly, a study of submergence in water intake structures concluded that predicted values were much higher than real values. A detailed analysis has been done to detect the origin of the off-set between the measured submergence and the calculated value. The main aspects selected from the analysis were the fluid properties involved in the surface deformation and the dynamic behavior outlet flow, so two a-dimensional numbers have been selected, Weber and Reynolds. To build an equation, to calculate the critical submergence, based on the mentioned a-dimensional numbers, a mixed technique (numerical and testing) has been used. The first step was driving a test in a hydraulic model to verify the critical submergence level. Then, a numerical model was built to simulate the same phenomenon and calibrate it, to be used in the future. After that, the second step is to simulate and calculate the critical submergence with other boundary condition (fluid, flow rate, pipe diameter). Once the critical submergence is calculated, a non-linear least squared approach has been developed to build the equation to calculate the critical submergence based on the Reynolds and Weber number. The numerical method used in this paper is a finite element model with a fluid volume scheme, used normally in the fluid simulation activities.
Flora bacteriana aeróbica del tracto digestivo del vampiro común, Desmodus rotundus (Chiroptera: Phyllostomidae)
Chaverri,Gloriana;
Revista de Biología Tropical , 2006,
Abstract: aerobic bacterial flora from the digestive tract of the common vampire bat, desmodus rotundus (chiroptera: phyllostomidae). this study addresses the composition of microbial flora in the vampire bat (desmodus rotundus) primarily because all available data are outdated, and because of the economical significance of this bat species. twenty-one bats were collected and their aerobic bacteria documented separately for stomach and intestine. bacteria were identified through the analytical profile index (api), and results analyzed with the apilab software. a total of thirty bacterial species were isolated from sixteen females and five males. the most common species were escherichia coli and staphylococcus aureus, although other bacteria, such as acinetobacter johnsonii, enterobacter sakazakii, staphylococcus chromogenes, s. hyicus and s. xylosus were also common. the number of species found in the stomach and intestine was significantly different, and the intestine presented a higher diversity compared to the stomach. this has previously been found in other mammals and it is attributed to a reduction of acidity. most of the species found in this study are considered normal components of the digestive tract of mammals, although other bacteria common in the skin of mammals and from aquatic environments were found. bacteria from the skin may invade the vampire?s stomach and/or intestine when the bat has contact with its prey, and may suggest that the vampire?s feeding habit facilitates the invasion of other microbes not common in its digestive tract. the fact that bacteria from aquatic environments were also found suggests that d. rotundus, as previously found by other researchers, drinks free water when available, and water may be another source of microbial invasion. rev. biol. trop. 54 (3): 717-724. epub 2006 sept. 29.
Flora bacteriana aeróbica del tracto digestivo del vampiro común, Desmodus rotundus (Chiroptera: Phyllostomidae)
Gloriana Chaverri
Revista de Biología Tropical , 2006,
Abstract: El objetivo de esta investigación fue determinar la flora bacteriana del vampiro común (Desmodus rotundus) primordialmente debido a que los datos al respecto están desactualizados, y además por la gran importancia económica de esta especie de murciélago. Veintiún murciélagos fueron recolectados y su flora bacteriana identificada separadamente a nivel de estómago e intestino. Las bacterias fueron identificadas con el Analytical Profile Index (API), y los resultados analizados con el paquete APILAB. Un total de treinta especies fueron aisladas en 16 hembras y cinco machos. Las especies más comunes fueron Escherichia coli y Staphylococcus aureus, aunque otras especies, como Acinetobacter johnsonii, Enterobacter sakazakii, Staphylococcus chromogenes, S. hyicus y S. xylosus también se aislaron con frecuencia. El número de especies identificadas en el estómago y el intestino fue significativamente diferente, siendo el intestino más diverso. Esto ha sido encontrado anteriormente en otros mamíferos, y se atribuye probablemente a la reducción en acidez. Asimismo, la mayoría de las especies identificadas en este estudio forman parte de la flora bacteriana normal del tracto digestivo de mamíferos, aunque también se encontraron otras bacterias comunes en la piel de mamíferos y en ambientes acuáticos Las bacterias de la piel podrían estar colonizando el estómago y/o intestino del vampiro cuando éste tiene contacto con sus presas, lo que sugiere que el hábito alimentario de esta especie facilita su colonización por microorganismos que no se encontrarían comúnmente en su tracto digestivo. Ya que también se identificaron bacterias comunes en ambientes acuáticos, es probable que D. rotundus consuma agua cuando esté disponible, lo que respalda los resultados de otros investigadores, y sugiere que esta podría ser una fuente adicional de invasión microbiana. Aerobic bacterial flora from the digestive tract of the common vampire bat, Desmodus rotundus (Chiroptera: Phyllostomidae). This study addresses the composition of microbial flora in the vampire bat (Desmodus rotundus) primarily because all available data are outdated, and because of the economical significance of this bat species. Twenty-one bats were collected and their aerobic bacteria documented separately for stomach and intestine. Bacteria were identified through the Analytical Profile Index (API), and results analyzed with the APILAB software. A total of thirty bacterial species were isolated from sixteen females and five males. The most common species were Escherichia coli and Staphylococcus aureus, although oth
Pulperos rurales: entre la vida privada y la pública
Carrera,Julián;
Mundo agrario , 2004,
Abstract: this article studies the private life of rural pulpero in the countryside of buenos aires and the activities developed when he is out of his store. through the analysis of testaments and inventorys of rural pulperos of buenos aires of late xviii century and early xix century the study attempt to penetrate in the privacy and alternatives activities. the work proves the existence of a space protected from the public intrusion. if is true that the frontier between private and public spaces often is widespread, the privacy has been conquered more an less for many rural pulperos. in this way the article place in doubt the image of general rusticity which involved rural life and place the pulperos inside the meddle classis of countryside population.
Voters' Rationality Under Four Electoral Rules: A Simulation Based on the 2010 Colombian Presidential Elections
Parada,Julián;
Desarrollo y Sociedad , 2011,
Abstract: in this work we analyze the impact of the voting rule on individual behavior. we use a sample of individuals naturally motivated by real candidates. then, in our methodology we do not induce preferences. moreover, up to our knowledge, this is the first work in which both individual behavior and aggregate results are studied with a relatively large sample. we implemented an online simulation during the presidential campaigns for 2010 in colombia. voters were asked to submit experimental ballots under four different voting rules: plurality rule, approval voting, borda rule and majority rule with runoff elections. we compared the observed individual behavior with two benchmarks. the fist one considers sincere voting and the second one instrumental behavior. our results show that under approval voting and borda rule we observe a lower level of sincerity and instrumental behavior in comparison to the other two rules. however, both models predict well the aggregate outcomes under all the voting rules.
El público, la ciencia y el supermercado (o el 10%)
Betancourt M,Julián;
Interciencia , 2002,
Abstract: public appropriation of science is to have as a goal, at least in our countries, the training of citizens for democratic life in the 21st century. the values of science and its many forms of thought are important in such training. this essay presents some ideas in this respect.
expresividad musical y lenguaje
Marrades Millet,Julián?;
EPISTEME , 2005,
Abstract: abstract in this article we explore the semantic dimension of music in relation to its expressive faculty. first, we appose the absolute conception of musical expression of romanticism to the representational conception, characteristic of enlightenment. then, we propose an alternative explanation of musical expressivity, based on the most recent philosophy of wittgenstein, as a response to some of the problems confronted by romantic aesthetics
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