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Search Results: 1 - 10 of 252516 matches for " Ramírez Céspedes "
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Criterios e indicadores para evaluar las bibliotecas digitales
Ramírez Céspedes,Zulia;
ACIMED , 2006,
Abstract: the concepts of digital library, traditional library, electronic library, hybrid library and virtual library are analyzed. a group of proposals found in literature to evaluate the digital libraries is considered, as well as an assembly of criteria and indicators to evaluate this type of entities. the proposed criteria are: identity, updating, accessibility, information architecture, information services, collections, content, design of interface, positioning, system of search and recovery, usability.
Criterios e indicadores para evaluar las bibliotecas digitales Criteria and indicators to evaluate digital libraries
Zulia Ramírez Céspedes
ACIMED , 2006,
Abstract: Se abordan los conceptos de biblioteca digital, biblioteca tradicional, biblioteca electrónica, biblioteca híbrida y biblioteca virtual. Se valora un grupo de propuestas, aparecidas en la literatura, para evaluar las bibliotecas digitales y se sistematiza un conjunto de criterios e indicadores para evaluar esta clase de entidades. Los criterios propuestos son: identidad, actualización, accesibilidad, arquitectura de información, servicios de información, colecciones, contenido, dise o de interfase, posicionamiento, sistema de búsqueda y recuperación y usabilidad. The concepts of digital library, traditional library, electronic library, hybrid library and virtual library are analyzed. A group of proposals found in literature to evaluate the digital libraries is considered, as well as an assembly of criteria and indicators to evaluate this type of entities. The proposed criteria are: identity, updating, accessibility, information architecture, information services, collections, content, design of interface, positioning, system of search and recovery, usability.
El profesional de la información como arquitecto de los contenidos en el Web
Caraballo Pérez,Yeter; Ramírez Céspedes,Zulia; Roque Chao,Dayamí;
ACIMED , 2006,
Abstract: with the objective of analyzing the function of the information professional as an information architect, as well as the origin and affiliation of the professionals that write about information architecture, organization and design, a search was carried out on the registered literature, different databases and search engines related to the subject. a group of theoretical-conceptual aspects is explored related to this subject, as well as the origin and affiliation of the professionals that write about this object of study. the information professional, due to his know-how on organization and presentation of the information, can perform as architect of efficient information websites.
El profesional de la información como arquitecto de los contenidos en el Web The information professional as an architect of the Web contents
Yeter Caraballo Pérez,Zulia Ramírez Céspedes,Dayamí Roque Chao
ACIMED , 2006,
Abstract: Con el objetivo de analizar la función del profesional de la información como arquitecto de información, así como la procedencia y afiliación de los profesionales que escriben sobre arquitectura, organización y dise o de la información, se realizó una búsqueda de la literatura registrada en diferentes bases de datos, motores y sitios relacionados con el tema. Se explora un grupo de aspectos teóricos-conceptuales relacionados con esta temática , así como la procedencia y afiliación de los profesionales que escriben sobre el tema objeto de estudio. El profesional de la información, debido a conocimientos sobre organización y presentación de la información, pueden desempe arse como un arquitecto de información eficiente de sitios Web. With the objective of analyzing the function of the information professional as an information architect, as well as the origin and affiliation of the professionals that write about information architecture, organization and design, a search was carried out on the registered literature, different databases and search engines related to the subject. A group of theoretical-conceptual aspects is explored related to this subject, as well as the origin and affiliation of the professionals that write about this object of study. The information professional, due to his know-how on organization and presentation of the information, can perform as architect of efficient information websites.
Impacto de la reforma del sistema de seguridad social sobre la equidad en los servicios de salud en Colombia
Céspedes-Londo?o, Juan Eduardo;Jaramillo-Pérez, Iván;Casta?o-Yepes, Ramón Abel;
Cadernos de Saúde Pública , 2002, DOI: 10.1590/S0102-311X2002000400008
Abstract: to evaluate the impact on access to, and use of, health services in colombia's new national health insurance system, the authors compared two cross sections of the population: before (1993) and after (1997), with the approval of act 100, creating the general system for social security in health (sgsss). two equity indicators were assessed: concentration curves (cc) and concentration indices (ci), summarizing the distribution of access to health care and utilization of health care services provided by the sgsss according to income deciles. between 1993 and 1997, the ci for access to insurance halved from 0.34 to 0.17; simultaneously, coverage increased from 23% to 57%, especially among the poorest segments of the population, where it increased from 3.7% to 43.7% as a result of subsidies provided by local governments. the ci for utilization of health care services did not vary significantly. increased disease prevalence and utilization of services among the insured, due to biased selection of risks and moral hazards, were also documented. these findings suggest a positive impact by the reform on inequalities in access to health care insurance; however, a similar effect on inequities in utilization of health services is not clear.
Impacto de la reforma del sistema de seguridad social sobre la equidad en los servicios de salud en Colombia
Céspedes-Londo?o Juan Eduardo,Jaramillo-Pérez Iván,Casta?o-Yepes Ramón Abel
Cadernos de Saúde Pública , 2002,
Abstract: Para evaluar el impacto sobre la equidad en el acceso y en la utilización de servicios de salud del nuevo Sistema General de Seguridad Social en Salud Colombiano (SGSSS), se compararon dos cortes transversales de la población, antes (1993) y después (1997) de promulgada la Ley 100, de 1993, que lo creó, con respecto a dos indicadores de equidad: las curvas (CC) e índices de concentración (IC) correspondientes a la distribución del aseguramiento y a la utilización de servicios. Entre 1993 y 1997, el IC en el aseguramiento se redujo a la mitad, del 0,34 al 0,17; simultáneamente, la cobertura del SGSSS se incrementó del 23% al 57%, sobretodo entre los segmentos más pobres de la población, donde pasó del 3,1% al 43,7%, como resultado de los subsidios otorgados por los gobiernos locales. Los IC en la utilización de servicios variaron muy poco. Adicionalmente, se detectó una mayor prevalencia de enfermedad y utilización de servicios entre los asegurados, debido a selección sesgada de riesgos y riesgo moral. Estos resultados sugieren un impacto positivo del SGSSS sobre las inequidades en el acceso al aseguramiento; sin embargo, no se evidenció un impacto claro sobre la equidad en la utilización final de servicios.
SOIL FERTILITY EVALUATION OF COFFEE (Coffea spp.) PRODUCTION SYSTEMS AND MANAGEMENT RECOMMENDATIONS FOR THE BARAHONA PROVINCE, DOMINICAN REPUBLIC
Nú?ez,P.A; Pimentel,A; Almonte,I; Sotomayor-Ramírez,D; Martínez,N; Pérez,A; Céspedes,CM;
Journal of soil science and plant nutrition , 2011, DOI: 10.4067/S0718-95162011000100010
Abstract: reported yields in most coffee farms of the barahona province in the dominican republic are relatively low (< 290 kg ha-1 parchment coffee). in general, coffee producers do not use diagnostic techniques such as soil testing. this fact prevents them from identifying the limiting factors (especially nutrients), complicates the work of coffee cultural management practices, and potentially reduces productivity and coffee quality. this study was designed to diagnose the fertility level of soils in coffee farms in the area of barahona in 96 farms within an area of 637 hectares and design a nutrient management strategy. soils from each farm were sampled and analyzed for soil fertility parameters. a survey was provided to farmers that permitted the collection of information regarding yields, management practices, and landscape features. soils in the area were predominantly clayey. soil ph varied between 4.61 and 7.69 and soil organic matter ranged between 3.29 and 10.9%. exchangeable potassium levels were classified as deficient in all areas. the clustering of results identified two main components, which accounted for 76% of the variability of the data and the grouping into five communities by similarity of features. the results show that soil testing of this coffee coffee-growing region can be used as a tool to diagnose the soil fertility status and guide them in implementing management and fertilization recommendations.
Hidrocarburos de petróleo, disueltos y dispersos, en cuatro ambientes costeros de Costa Rica
Acu?a-González,Jenaro; Vargas-Zamora,José A; Gómez-Ramírez,Eddy; García-Céspedes,Jairo;
Revista de Biología Tropical , 2004,
Abstract: four coastal ecosystems with contrasting characteristics were sampled in costa rica (2000 - 2002). oil pollution status, expressed as the fraction of dissolved/dispersed petroleum hydrocarbons related to chrysene equivalents, was determined by the molecular fluorescence analytical technique. a total of 130 water samples were taken, from the caribbean (moín bay), and from the pacific (bahía culebra, gulf of nicoya and dulce gulf). on one occasion, seven samples along the puntarenas estuary were also analysed. in moín the mean and standard deviation were 0.10 μg·l-1 ± 0.18 μg·l-1 , ranging from non detectable (nd) to 0.65 μg·l-1 . for the pacific ecosystems the total range was from nd to 0.37 μg·l-1 . in bahía culebra no fluorescence signals were obtained. in the gulf of nicoya the mean and standard deviation were 0.04 μg·l-1 ± 0.09 μg·l-1 , from nd to 0.33 μg·l-1 . values in dulce gulf were 0.05 μg·l-1 ± 0.11 μg·l-1 , from nd to 0.37 μg·l-1 . along the puntarenas estuary the range was 0.17 to 5.91 μg·l-1 , with a mean of 1.21 μg·l-1 and a standard deviation of ± 2.10 μg·l-1 . the four coastal ecosystems had concentrations below the 10 μg·l-1 limit for polluted oceanic areas. the puntarenas estuary reflects the influence of antropogenic activities from and around the city of puntarenas. these levels are considered low for inshore waters
Hidrocarburos de petróleo, disueltos y dispersos, en cuatro ambientes costeros de Costa Rica
Jenaro Acu?a-González,José A Vargas-Zamora,Eddy Gómez-Ramírez,Jairo García-Céspedes
Revista de Biología Tropical , 2004,
Abstract: Entre los a os 2000 a 2002 se recolectaron y se analizaron 130 muestras de agua de mar en las costas de Costa Rica, para determinarles la concentración de hidrocarburos de petróleo disueltos y dispersos (HPDD), referida a equivalentes de criseno en hexano, y expresada como μg·L-1 . Se utilizó la técnica analítica de fluorescencia molecular. 42 muestras correspondieron al Caribe (Moín) y 81 al Pacífico (Bahía Culebra, Golfo de Nicoya, Golfo Dulce y en una ocasión se tomaron muestras a lo largo del Estero de Puntarenas). En la zona costera de Moín el promedio de la concentración de HPDD fue 0.10 μg·L-1 , con una desviación estándar de ± 0.18 μg·L-1 , en un ámbito desde concentraciones no detectables por el método, (nd), hasta 0.65 μg·L-1 . En el Pacífico las concentraciones para todo el período del estudio, estuvieron entre nd y 0.37 μg·L-1 . En la Bahía Culebra no se detectaron HPDD en ninguna de las muestras (n = 12); en el Golfo de Nicoya el promedio y la desviación estándar fueron 0.04 μg·L-1 ± 0.09 μg·L-1 (n = 51), en un ámbito desde nd hasta 0.33 μg·L-1 . En el Golfo Dulce el promedio y la desviación estándar fueron 0.05 μg·L-1 ± 0.11 μg·L-1 (n = 18), en el ámbito desde nd a 0.37 μg·L-1 . Durante las fechas en que se llevó a cabo el muestreo, no se encontró una situación de contaminación por petróleo en los ecosistemas costeros estudiados, puesto que las concentraciones de HPDD no rebasaron el límite de 10 μg·L-1 referido a equivalentes de criseno, considerado típico de áreas oceánicas contaminadas. En Bahía Culebra fue la primera vez que se hizo el estudio de la contaminación por petróleo y se comprobó que en las fechas de muestreo la zona estuvo libre de esta contaminación. El promedio y la desviación estándar en el Estero de Puntarenas fueron 1.21 μg·L-1 ± 2.10 μg·L-1 (n = 7), en un ámbito de 0.17 a 5.91 μg·L-1 . Estos resultados evidenciaron una situación de contaminación moderada y la naturaleza estuarina de este cuerpo de agua costera, que distribuye irregularmente los HPDD descargados en ella Four coastal ecosystems with contrasting characteristics were sampled in Costa Rica (2000 - 2002). Oil pollution status, expressed as the fraction of dissolved/dispersed petroleum hydrocarbons related to chrysene equivalents, was determined by the molecular fluorescence analytical technique. A total of 130 water samples were taken, from the Caribbean (Moín Bay), and from the Pacific (Bahía Culebra, Gulf of Nicoya and Dulce Gulf). On one occasion, seven samples along the Puntarenas estuary were also analysed. In Moín the mean and standard deviation were 0
Influencia de algunos factores de riesgo cardiovasculares sobre los eventos clínicos adversos más frecuentes, en pacientes revascularizados con circulación extracorpórea
Llanes Echevarría,José Ramón; Pérez López,Horacio; Rodríguez Nande,Lidia; Solís Cordero,Michel; Batista Castellanos,Maité; Bacallao San Julian,Francisco; Céspedes Arias,Gerardo; Mojena Morfa,Guillermo; Ramírez López,Milvio;
Revista Cubana de Cirug?-a , 2011,
Abstract: objective: to determine how different risk factors influence on the more frequent adverse clinical events during the immediate postoperative period of patients operated on myocardial revascularization surgery with extracorporeal circulation. methods: a prospective, longitudinal and observational study was conducted in 60 patients from the institute of cardiology and cardiovascular surgery for 2008-2009. results: there was predominance of dyslipemia patients (90 %) and hypertensive patients (86.7 %). patients with manifestation of adverse clinical events showed a close association with dyslipemia (p< 0.01), a significant decrease of ejection fraction of left ventricle (p< 0.05), a significant increase of extracorporeal circulation times (p < 0.01) and ischemic arrest (p< 0.05). conclusions: the basal dyslipemia, the depressed left ventricle ejection and the length of surgical procedure, were the more significant risk factors for development of adverse clinical events during the immediate postoperative period of revascularization patients.
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