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The Numerical and Experimental Analysis of Concrete Bridges of Different Typologies Análisis numérico y experimental de puentes de hormigón de diferentes tipologías
Leonel Osvaldo Pico,María Haydeé Peralta,Norma Luján Ercoli,Salvador La Malfa
Revista Cubana de Ingeniería , 2011, DOI: 10.1234/rci.v2i1.38
Abstract: The increase in vehicular load and velocity over the years has prompted the need for structural modifications of concrete bridges. The measurements and analysis of vibrations in situ along with numerical techniques aid in the global evaluation of these structures by obtaining the dynamic characteristics and corresponding response. These measurements are then compared to international standards and codes in order to formulate superior concrete bridges with the objective of obtaining the influence of the difference in typology on the behavior of bridges. Bridge 1 uses a two way system with beams and deck slabs and bridge 2 is a superior structure composed of pretension T beams and situ-cast concrete deck. These findings are fundamental references in the designing of bridges. El incremento de las cargas y de las velocidades de circulación vehicular de los últimos a os provoca una modificación en el comportamiento estructural de puentes de hormigón entre 30 y 50 a os de vida en servicio. Se originan problemas que no solo se relacionan con la seguridad estructural sino también con el confort, lo cual motiva la necesidad de un monitoreo y evaluación de su comportamiento estructural. La medición y análisis de vibraciones in situ, junto con el uso de técnicas numéricas, permiten realizar la evaluación global de dichas estructuras, a partir de la obtención de las características dinámicas y respuesta correspondiente. Los resultados de las mediciones efectuadas se comparan con normas y criterios actuales existentes a nivel internacional.En el presente trabajo se evalúan dos puentes de hormigón de tablero superior correspondientes a tipologías estructurales diferentes, en un caso emparrillado de vigas y losas llenas y en el otro vigas de hormigón pretensadas tipo doble T y losas llenas hormigonadas in situ, con el objetivo de determinar la influencia de las tipologías en el comportamiento estructural. Los análisis efectuados permiten arribar a conclusiones sobre la relación entre la respuesta estructural y la tipología estructural correspondiente, de interés para el dise o y/o evaluación de puentes.
Decisión de desinversión como alternativa de la gestión financiera de una empresa venezolana
Pico Pico,Gonzalo;
Universidad, Ciencia y Tecnología , 2005,
Abstract: the intention of this document is to demonstrate the effect over the evaluation in an investment project has the fact to considerate the possibility to abandon it or disinvestment into the project. to begin with the investigation from existent bibliography about this issue or topic and through of practical exercises, a comparative analysis is made between two alternatives: to take in consideration the possibility of abandonment or disinvestment neither considerate it as a possibility. as a result, it was determinate that for the management has a lot of importance to considerate the real possibility to abandon an investment, because if you do not do it, the profits, revenues and risk of the firm could be affected. this issue has a lot of apply for many venezuelan companies which in the past years had been seriously threatened for a long economic depressing period in this country.
El mapa de procesos: Elemento fundamental de un sistema de gestión de calidad para empresas de servicios en Venezuela
Gonzalo Pico
Revista Venezolana de Análisis de Coyuntura , 2006,
Abstract: Esta investigación tuvo como objetivo elaborar el mapa de procesos de un sistema de gestión de calidad para empresas venezolanas, específicamente del sector servicios, con base en la norma COVENIN ISO 9001: 2000. En este caso se seleccionó una empresa de consultoría de tama o medio, representativa del sector. Se utilizó la investigación documental, mediante la revisión y análisis de información existente sobre el tema y la investigación de campo, mediante la aplicación de instrumentos de recolección de información para obtener datos; además, la investigación fue de tipo aplicada, puesto que los resultados se utilizaron inmediatamente para resolver los problemas detectados. Los resultados de la investigación indican que para una empresa de servicios es fun-damental elaborar un mapa de procesos como herramienta de gestión de calidad, porque facilita el control de los aspectos claves a mejorar constantemente y le permiten aumentar su valor agregado.
Analgesia preventiva en hembras Caninas sometidas a Ovariohisterectomía: comparación del efecto analgésico de Morfina y Tramadol asociados a Xilazina
Sandoval,Osvaldo; Herzberg,Daniel; Galecio,Sebastián; Cardona,Leonel; Bustamante,Hedie;
Revista Científica , 2010,
Abstract: the objective of the present study was to compare and evaluate the postoperative analgesic effects after the preventive administration of tramadol and morphine combined with xylazine in canine ovarihysterectomy. twenty four adult bitches without distinction of race and age were used. animals were randomly assigned to three different groups receiving respectively: control group: 0.5 mg/kg xilazine, tramadol group 0.5 mg/kg xilazine + 3 mg/kg tramadol and morphine group: 0.5 mg/kg xilazine + 0.4 mg/kg morphine. surgeries were carried out without complications under general anaesthesia under isoflurane. pain evaluations started 30 minutes after removing the endotracheal tube and carried out for 10 hours every thirty minutes for the first six hours and then every hour. pain scores were determined using a numerical rating scale. pain scores between different treatments were analyzed using kruskall-wallis non-parametric analysis of variance. a value of p<0.05 was considered to be statistically significant. pain scores showed significant differences (p<0.05) between control and tramadol groups at third, third and a half, fourth and seventh hour. similarly at six, nine and ten hours of evaluation significant differences (p<0.05) between control and morphine groups were found. finally at four hour thirty minutes, the five hours thirty minutes and the eigth hour these significant differences (p<0.05) were between control and morphine and tramadol groups. it can be concluded that tramadol and morphine are effective and safe for the control of early post surgical pain in canine ovariohysterectomy.
TRATAMIENTO QUIRúRGICO DE ANEURISMAS INTRACRANEALES GIGANTES CON CIRCULACIóN EXTRACORPóREA EN EL CARDIOCENTRO / Surgical treatment of giant intracranial aneurysm using cardiopulmonary bypass at the cardiocentro
Pedro Aníbal Hidalgo Menéndez,Alain Moré Duarte,Osvaldo González Alfonso,Leonel Fuentes Herrera
CorSalud , 2011,
Abstract:
REDUCCIóN DE TRANSFUSIONES ALOGéNICAS EN CIRUGíA CARDíACA EMPLEANDO UN PROGRAMA DE AHORRO DE SANGRE / The reduction of allogeneic blood transfusions in cardiac surgery using a blood saving program
Pedro A. Hidalgo Menéndez,Osvaldo González Alfonso,Alain Moré Duarte,Leonel Fuentes Herrera
CorSalud , 2009,
Abstract: Antecedents and objectives: Cardiac surgery has been a process which traditionally requires large amounts of homologous blood transfusions. Due to the negative effects on perioperativemorbimortality, and its cost, some alternatives have been developed in order to reduce or avoid giving a transfusion to the patients. The aim of this study is to put into practice and assess theeffectiveness of a strategy for reducing the use of allogeneic transfusions in the cardiac surgery perioperative at the Ernesto Che Guevara Cardiology Hospital. Method: 151 patients, who were operated on with or without extracorporeal circulation, and who were inserted in a blood saving program that included acute intentional normovolemic hemodilution with autotransfusion during theyear 2008, were studied in order to assess the effectiveness of such strategies. Results: It was possible to avoid the transfusions with allogeneic components in 55 percent of the patients (56.0 percent from the group intervened with extracorporeal circulation (ECC), and 52.64 percent of the patients operated on without ECC) and the patients who received the transfusions needed a smaller amount of allogeneic blood components, as well as fewer units administered through the transfusion. Conclusions: The strategies for saving blood were effective in order to reduce the homologous transfusions in the cardiac surgery perioperative.
Decreto de inamovilidad laboral y su aplicación por parte de la gerencia en venezuela
Pico Pico,Gonzalo; Corredor Rincón,Edwin;
Universidad, Ciencia y Tecnología , 2006,
Abstract: this paper has as objective to do an analysis about the employees immobility decree actually in force in venezuelan labor sector and the way how the venezuelan management should apply it. it is a documental investigation in which the diverse contained aspects are analyzed in this decree as well as the interpretation that should be given by the employers. as a result, the employer has the possibility to fire a worker who has this labor protection if a justified cause exists to do it, and also the labor procedure established in laws has been applied, fact which seems to be unconsidered by many managers
CONDUCCIóN ANESTéSICA DE LA REVASCULARIZACIóN MIOCáRDICA VIDEO-ASISTIDA. INFORME DE CINCO CASOS / Anesthetic conduction of video-assisted myocardial revascularization. Report of five cases
Antonio de Arazoza Hernández,Fausto Leonel Rodríguez Salgueiro,Miguel ángel Carrasco Molina,Osvaldo Valdés Dupeirón
CorSalud , 2011,
Abstract: The advantages of video-assisted cardiac surgery are very necessary for high-risk patients, but subjecting them to possible complications is a big responsibility and a challenge for the cardiovascular anesthesiologist. This article presents the first five cases of video-assisted coronary artery bypass grafting in the country, and describes the anesthetic techniques and results. Also, the advantages of this surgical technique are discussed: less invasive, less postoperative pain, less duration of postoperative intubation and ventilation, minimal risk of infection and bleeding, reduced need for transfusions, and better healing and aesthetics of the wound. It was concluded that although this series is small, we consider it a good option for patients with ischemic heart disease and a single-vessel (anterior descending artery) revascularization criterion, not accessible to intervention.
La esclavitud de los sentimientos: vida familiar y afectiva de la población esclava en el nororiente del Nuevo Reino de Granada, 1720-1819
Pita Pico, Roger
Revista de Indias , 2012,
Abstract: Even on top of the established rules in the Nuevo Reino de Granada, the possibility of slaves establishing loving relationships or marrying always depended on the will and interests of the masters. Contact with free people brought certain complications to the slaves, but it also opened up greater opportunities for their emotional lives. The outlook for the slaves’ family was not more encouraging. Trade dynamics, the manumission and other forms of slaves circulation represented a constant threat to the unity of these blood communities. There were many efforts and repeated pleas by those affected crying out for better conditions for a more stable emotional life. Aún por encima de las normas establecidas en el Nuevo Reino de Granada, la posibilidad de los esclavos de entablar relaciones afectivas o de comprometerse en matrimonio siempre dependió de la voluntad y de los intereses de los amos. El cruce con personas libres también le trajo al esclavo ciertas complicaciones aunque también le abrió mayores oportunidades en su vida afectiva. El panorama para la familia esclava no era más alentador. La dinámica comercial, la manumisión y otras formas de circulación de esclavos, representaron una amenaza constante para la unidad de esas comunidades de sangre. Muchos fueron los esfuerzos y reiteradas las súplicas de los afectados por clamar mejores condiciones para llevar una vida afectiva más estable.
La atención a los padres con hijos con necesidades educativas especiales (NEE)
Claudia María Pernas Pico
Zona Próxima , 2011,
Abstract: Los padres que tienen hijos con necesidades educativas especiales (NEE) necesitan al igual que sus hijos de la intervención del maestro de Audición y Lenguaje con el objetivo primordial de mejorar la comunicación y el lenguaje de los ni os. Se pretende en este artículo dar un abanico de posibilidades de cómo se puede intervenir con los padres desde las escuelas: con largas horas de reuniones, con formación, con talleres, con actividades y juegos, con libretas viajeras, con peque as pautas, etc... Siempre desde la empatía y la profesionalidad que debe transmitir el maestro de Audición y Lenguaje. Cambiando la preocupación de los padres por su ocupación.
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