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Search Results: 1 - 10 of 212772 matches for " Caraballo Pérez "
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Los Topic Maps y su relación con las redes sociales
Caraballo Pérez,Yeter;
ACIMED , 2007,
Abstract: some theoretical considerations on the increase of specifications such as xml topic maps are made. the main definitions and characteristics of topic maps are exposed. the aspects that relate topic maps to the social networks are identified through the advances they offer in connection with management knowledge and the semantic web consolidation.
La gestión de contenidos en portales Web
Caraballo Pérez,Yeter;
ACIMED , 2007,
Abstract: some considerations on the present status of the web portal content management, as well as the relation and importance in the organization, and its implementation starting from the free software tools, are presented. the competences of the information professional to develop this management work in the era of the information society are approached. it is concluded that the web content management is one of the most important functions of the information professional. in the internet and web portal contexts, the task of these professional is to manage the information so that the adequate users receive it properly and in due time.
Los Topic Maps y su relación con las redes sociales The Topic Maps and their connection with social networks
Yeter Caraballo Pérez
ACIMED , 2007,
Abstract: Se realizan algunas consideraciones teóricas sobre el auge de las especificaciones como XML Topic Maps. Se exponen las principales definiciones y características de los Topic Maps. Se identifican los aspectos que relacionan a los Topic Maps con las redes sociales, a partir de los avances que estos ofrecen en materia de gestión del conocimiento y con respecto a la consolidación de la Web semántica. Some theoretical considerations on the increase of specifications such as XML Topic Maps are made. The main definitions and characteristics of Topic Maps are exposed. The aspects that relate Topic Maps to the social networks are identified through the advances they offer in connection with management knowledge and the semantic Web consolidation.
La gestión de contenidos en portales Web The Web portal content management
Yeter Caraballo Pérez
ACIMED , 2007,
Abstract: Se presentan algunas consideraciones sobre el estado actual de la gestión de contenidos en portales Web; así como la relación e importancia en la organización y su puesta en práctica a partir de las herramientas de software libre. Se abordan las competencias que posee el profesional de la información para desarrollar esta labor de gestión en la era de la sociedad de la información. La gestión de contenidos es una de las funciones más importantes del profesional de la información. En el contexto de Internet y los portales Web, la tarea de estos profesionales es gestionar la información para que esta llegue a los usuarios adecuados de forma adecuada y en el tiempo adecuado. Some considerations on the present status of the Web portal content management, as well as the relation and importance in the organization, and its implementation starting from the free software tools, are presented. The competences of the information professional to develop this management work in the era of the information society are approached. It is concluded that the Web content management is one of the most important functions of the information professional. In the Internet and Web portal contexts, the task of these professional is to manage the information so that the adequate users receive it properly and in due time.
El análisis de las redes sociales en la identificación de las relaciones de colaboración: estudio de la Revista Cubana de Ciencia Agrícola
Caraballo Pérez,Yeter; Más Basnuevo,Anays;
ACIMED , 2009,
Abstract: the analysis of the social networks allows determining the relationships of collaboration established in any organizational structure. an information source like the revista cubana de ciencia agrícola can be studied to determine that type of relationship among their authors. this is the more important scientific publication edited by the instituto de ciencia animal; their frequency is quarterly. with the aim to identify the most prominent authors as regards cooperation and exchange of information and knowledge and the most frequent relationships of collaboration, the 361 articles published by the journal between 1999 and 2007 were studied. microsoft office excel 2007 was used to register and to normalize data; ucinet, for the matrix analysis, and netdraw, to represent the social networks. the characterization of the most outstanding authors with regard to the cooperation in the journal and their collaboration relationships allowed to identify collaboration fronts of collaboration and the exchange of the information/knowledge, what, without doubts, it will facilitate the understanding of the changes that the organization should be carried out to improve their access to this essential input of the activity of all modern organization.
El análisis de las redes sociales en la identificación de las relaciones de colaboración: estudio de la Revista Cubana de Ciencia Agrícola Social networks analysis related to characterization of collaborative relations: study about Revista Cubana de Ciencia Agrícola
Yeter Caraballo Pérez,Anays Más Basnuevo
ACIMED , 2009,
Abstract: El análisis de las redes sociales permite determinar las relaciones de colaboración que se establecen en cualquier estructura organizativa. Una fuente de información como la Revista Cubana de Ciencia Agrícola puede estudiarse para determinar ese tipo de relaciones entre sus autores. Esta es la publicación científica más importante emitida por el Instituto de Ciencia Animal; su periodicidad es trimestral. Con el objetivo de identificar los autores más prominentes en materia de cooperación e intercambio de información/conocimiento y las relaciones de colaboración más frecuentes en la Revista Cubana de Ciencia Agrícola, se estudiaron los 361 artículos publicados por la revista entre 1999 y 2007. Se empleó Microsoft Office Excel 2007 para registrar y normalizar los datos; Ucinet para el análisis de las matrices y NetDraw para representar las redes sociales. La identificación de los autores más destacados con respecto a la cooperación en la revista y sus relaciones de colaboración permitió identificar frentes de colaboración y de intercambio de la información/conocimiento, lo que, sin dudas, facilitará la comprensión de los cambios que se deben realizar para mejorar su acceso a este insumo esencial de la actividad de toda organización moderna. The analysis of the social networks allows determining the relationships of collaboration established in any organizational structure. An information source like the Revista Cubana de Ciencia Agrícola can be studied to determine that type of relationship among their authors. This is the more important scientific publication edited by the Instituto de Ciencia Animal; their frequency is quarterly. With the aim to identify the most prominent authors as regards cooperation and exchange of information and knowledge and the most frequent relationships of collaboration, the 361 articles published by the journal between 1999 and 2007 were studied. Microsoft Office Excel 2007 was used to register and to normalize data; Ucinet, for the matrix analysis, and NetDraw, to represent the social networks. The characterization of the most outstanding authors with regard to the cooperation in the journal and their collaboration relationships allowed to identify collaboration fronts of collaboration and the exchange of the information/knowledge, what, without doubts, it will facilitate the understanding of the changes that the organization should be carried out to improve their access to this essential input of the activity of all modern organization.
Epidemiological and Clinical aspects of Snakebites in Bolivar State, Venezuela
A Caraballo,J Navarro,E Sánchez,JC Pérez
Revista de la Facultad de Medicina , 2004,
Abstract: ABSTRACT: A retrospective study of the clinical and epidemiological aspects of snakebites in the Bolivar State, Venezuela, from January 1990 to December 1999 was done for 284 patients from the University Hospital Ruiz y Paez, in Bolivar City, Venezuela. Most of the patients were rural workers, 155 (76.4%) males and 48 (23.6%) females, from one to sixty years old. One hundred and five (51.7%) patients were diagnosed as bitten by Bothrops snakes; 75 (37.0%) by Crotalus, and 23 (11.3%) by Lachesis. One hundred seventy five (86.2%) were bitten in the legs and 28 (13.8%) in the arms. The high incidence of bothropic envenomation was from January to November, while crotalic envenomation was from June to December. Lachesic envenomation was from October to December. This study showed that the prevalence of crotalic envenomation in Bolivar State was higher than other regions of the country. Further prospective epidemiological studies will be necessary for a better understanding of these findings. RESUMEN. Se estudia retrospectivamente los aspectos clínicos y epidemiológicos de los pacientes con mordeduras de serpientes en el Estado Bolívar, Venezuela. Se revisaron los expedientes de 284 pacientes del Hospital Universitario Ruiz y Páez en Ciudad Bolívar, Venezuela desde enero 1990 hasta diciembre 1999 que sufrieron mordeduras de serpientes. La mayoría de estos pacientes fueron trabajadores rurales, 155 (76.4) hombres y 48 (23.6%) mujeres, con edades entre un a o y mayores de sesenta a os. Ciento cuatro (51.7%) pacientes fueron mordidos por serpientes del genero Bothrops, 75 (37.0%) por Crotalus y 23 (11.3%) por Lachesis. Ciento veinticuatro (86.2%) fueron mordidos en las piernas y 28 (13.8%) en el brazo. De enero a noviembre fueron los meses de mayor incidencia de envenenamientos botrópicos, mientras los envenenamientos crotálicos fueron de junio a diciembre. Los envenenamientos lachésicos fueron de octubre a diciembre. Este estudio mostró que la prevalencia de envenenamientos crotálicos en el estado Bolívar fue más elevado que en otra región de Venezuela. Promover estudios epidemiológicos prospectivos será necesario para una mejor comprensión de estas conclusiones.
Epidemiological and Clinical Aspects of Snakebites in Monagas State, Venezuela
J Navarro,A Caraballo,E Sánchez,JC Pérez
Revista de la Facultad de Medicina , 2003,
Abstract: : One hundred fifty-eight patients bitten by venomous snakes were retrospectively studied at Manuel Nu ez Tovar Hospital, Monagas state, Venezuela, from January 1990 to December 1999. Most of these patients were rural workers: 124 (78%) males and 34 (22%) females, ranging in ages from one to over sixty. One hundred and five (67%) patients were diagnosed as bitten by Bothrops and 53 (33%) by Crotalus snakes. One hundred twenty-one (76%) were bitten in the legs and 37 (24%) in the arms. January, April, May, September, October, November and December were the months of higher incidence of bothropic envenomations, while crotalic envenomations were March, August and December. This study showed that the prevalence of crotalic envenomations in the Monagas state was higher compared to other states in the country. Additional prospective epidemiological studies are needed for a better understanding of these findings. RESUMEN. Fueron estudiados retrospectivamente ciento cincuenta y ocho pacientes mordidos por serpientes venenosas en las historias médicas del Hospital Manuel Nú ez Tovar del estado Monagas, Venezuela desde enero de 1990 hasta diciembre de 1999. La mayoría de estos pacientes fueron trabajadores rurales: 124 (78%) hombres y 34 (22%) mujeres, en edades desde 1 hasta más de 60 a os. Ciento cinco (67%) pacientes fueron diagnosticados con mordedura de serpientes del género Bothrops y 53 (33%) por Crotalus. Ciento veinte y un (76%) fueron mordidos en las piernas y 37 (24%) en los brazos. Los meses de enero, abril, mayo, septiembre, octubre noviembre y diciembre fueron los de mayor incidencia para el envenenamiento bothrópico, mientras el envenenamiento crotálico fue mayor en los meses de marzo, agosto y diciembre. Este trabajo mostró que la prevalencia del envenenamiento crotálico fue muy alta en comparación con otros estados del país. Estudios adicionales en epidemiología prospectiva serán necesarios para un mejor entendimiento de los hallazgos observados en este trabajo.
Exponential decay estimates for Singular Integral operators
Carmen Ortiz-Caraballo,Carlos Pérez,Ezequiel Rela
Mathematics , 2012,
Abstract: The following subexponential estimate for commutators is proved |[|\{x\in Q: |[b,T]f(x)|>tM^2f(x)\}|\leq c\,e^{-\sqrt{\alpha\, t\|b\|_{BMO}}}\, |Q|, \qquad t>0.\] where $c$ and $\alpha$ are absolute constants, $T$ is a Calder\'on--Zygmund operator, $M$ is the Hardy Littlewood maximal function and $f$ is any function supported on the cube $Q$. It is also obtained \[|\{x\in Q: |f(x)-m_f(Q)|>tM_{1/4;Q}^#(f)(x) \}|\le c\, e^{-\alpha\,t}|Q|,\qquad t>0,\] where $m_f(Q)$ is the median value of $f$ on the cube $Q$ and $M_{1/4;Q}^#$ is Str\"omberg's local sharp maximal function. As a consequence it is derived Karagulyan's estimate \[|\{x\in Q: |Tf(x)|> tMf(x)\}|\le c\, e^{-c\, t}\,|Q|\qquad t>0,\] improving Buckley's theorem. A completely different approach is used based on a combination of "Lerner's formula" with some special weighted estimates of Coifman-Fefferman obtained via Rubio de Francia's algorithm. The method is flexible enough to derive similar estimates for other operators such as multilinear Calder\'on--Zygmund operators, dyadic and continuous square functions and vector valued extensions of both maximal functions and Calder\'on--Zygmund operators. On each case, $M$ will be replaced by a suitable maximal operator.
Improving bounds for singular operators via Sharp Reverse H?lder Inequality for $A_{\infty}$
Carmen Ortiz-Caraballo,Carlos Pérez,Ezequiel Rela
Mathematics , 2012,
Abstract: In this expository article we collect and discuss some recent results on different consequences of a Sharp Reverse H\"older Inequality for $A_{\infty}$ weights. For two given operators $T$ and $S$, we study $L^p(w)$ bounds of Coifman-Fefferman type. $ \|Tf\|_{L^p(w)}\le c_{n,w,p} \|Sf\|_{L^p(w)}, $ that can be understood as a way to control $T$ by $S$. We will focus on a \emph{quantitative} analysis of the constants involved and show that we can improve classical results regarding the dependence on the weight $w$ in terms of Wilson's $A_{\infty}$ constant $ [w]_{A_{\infty}}:=\sup_Q\frac{1}{w(Q)}\int_Q M(w\chi_Q).$ We will also exhibit recent improvements on the problem of finding sharp constants for weighted norm inequalities involving several singular operators. We obtain mixed $A_{1}$--$A_{\infty}$ estimates for the commutator $[b,T]$ and for its higher order analogue $T^k_{b}$. A common ingredient in the proofs presented here is a recent improvement of the Reverse H\"older Inequality for $A_{\infty}$ weights involving Wilson's constant.
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