Viabilidad de la cogeneración eólica en las plantas desaladoras

El objetivo principal de este estudio, es realizar una valoración detallada y actualizada sobre la viabilidad de la cogeneración eólica en las desaladoras. Se centrará en aspectos económicos y técnicos, los aspectos medioambientales no serán objeto de este estudio, aunque siempre estas soluciones cumplirán con las normativas existentes al respecto. El resultado del estudio de la viabilidad económica, será obtener el porcentaje de ahorro en todo el proceso de desalación del agua, teniendo en cuenta diferentes variables y factores para la obtención de los resultados, como por ejemplo, diferentes tamaños de desaladoras, diferentes configuraciones de alimentación de la potabilizadora, diferentes índices de rentabilidades, etc. A la vez, y para no hacer un estudio muy extenso, se han tenido en cuenta una producción eólica constante, a un precio de venta constante, y el precio de compra de la energía constante. La decisión de elegir la energía eólica es porque la tecnología está bastante avanzada tecnológicamente y tiene un rendimiento alto, aún con valores de velocidad muy bajos, por ello puede ser una posibilidad para disminuir los altos costes de energía que tienen estas instalaciones y que sean más atractivas para tenerlas en cuenta. La cogeneración se hace necesaria, puesto que, se puede dar al caso que no hubiese aire, pero haya necesidad de suministro de agua, y éste es una necesidad primaria y se debe de asegurar siempre su disponibilidad y suministro.Ingeniería Industria

Plan de acciones recreativas que favorezcan la masificación por la práctica del Voleibol en niños de 8-10 años en la Escuela Comunitaria no.10 Ceferino Fernández Viñas del Municipio Pinar del Río

Nuestro trabajo el cual está titulado Plan de acciones recreativas que favorezcan la masificación por la practica del Voleibol, tiene su punto de partida en la problemática consistente en el debilitamiento que existe en la masificación por la práctica del Voleibol en la comunidad, por lo que el mismo persigue como objetivo fundamental proponer un plan de acciones recreativas que favorezcan la masificación por la práctica del Voleibol en niños de 8-10 años de la escuela comunitaria No 10 Ceferino Fernández Viñas, del consejo popular Ceferino Fernández Viñas del Municipio Pinar del Río, consistente en acciones tanto físicas como educativas; para la cumplimentaciòn del mismo nos apoyamos en la utilización de diferentes métodos rectorados por el dialéctico materialista, donde podemos encontrar los teóricos, empíricos y matemáticos estadísticos, destacándose el histórico-lógico, enfoque sistema y el análisis documental, y dentro los empíricos la encuesta para niños, a entrenadores, la observación y métodos de intervención comunitaria como entrevista a informantes claves y el forum comunitario. Los mismos nos permitieron la recopilación de información, recogida de datos así como el procesamiento estadístico de los mismos, además nuestra investigación se puso en práctica durante un periodo de 3 meses donde podemos plantear que se han obtenido resultados satisfactorios, obteniendo a su vez valoraciones emitidas por especialistas donde sus ideas, criterios, valoraciones y sugerencias nos permitieron profundizar en nuestra propuesta así como su futura puesta en practica, esperando obtener resultados objetivos con vista a su validación y de esta forma hacerla extensiv

A group signature scheme based on the integer factorization and the subgroup discrete logarithm problems

8 pagesGroup signature schemes allow a user, belonging to a speci c group of users, to sign a message in an anonymous way on behalf of the group. In general, these schemes need the collaboration of a Trusted Third Party which, in case of a dispute, can reveal the identity of the real signer. A new group signature scheme is presented whose security is based on the Integer Factorization Problem (IFP) and on the Subgroup Discrete Logarithm Problem (SDLP).This work has been partially supported by the \Fundaci on Memoria D. Samuel Sol orzano Barruso" under the Project FS/7-2010.Peer reviewe

A multisignature scheme based on the SDLP and on the IFP

8 páginasMultisignature schemes are digital signature schemes that permit one to determine a unique signature for a given message, depending on the signatures of all the members of a speci c group. In this work, we present a new semi-short multisignature scheme based on the Subgroup Discrete Logarithm Problem (SDLP) and on the Integer Factorization Problem (IFP). The scheme can be carried out in an on- and o -line basis, is efficient, and the bitlength of the multisignature does not depend on the number of signers.This work has been partially supported by the \Fundación Memoria D. Samuel Solórzano Barruso" under the Project FS/7-2010.Peer reviewe

A group signature scheme based on the integer factorization and the subgroup discrete logarithm problems

8 pagesGroup signature schemes allow a user, belonging to a speci c group of users, to sign a message in an anonymous way on behalf of the group. In general, these schemes need the collaboration of a Trusted Third Party which, in case of a dispute, can reveal the identity of the real signer. A new group signature scheme is presented whose security is based on the Integer Factorization Problem (IFP) and on the Subgroup Discrete Logarithm Problem (SDLP).This work has been partially supported by the \Fundaci on Memoria D. Samuel Sol orzano Barruso" under the Project FS/7-2010.Peer reviewe

Factors influencing the missed nursing care in patients from a private hospital

Objective: to determine the factors that influence the missed nursing care in hospitalized patients. Methods: descriptive correlational study developed at a private hospital in Mexico. To identify the missed nursing care and related factors, the MISSCARE survey was used, which measures the care missed and associated factors. The care missed and the factors were grouped in global and dimension rates. For the analysis, descriptive statistics, Spearman’s correlation and simple linear regression were used. Approval for the study was obtained from the ethics committee. Results: the participants were 71 nurses from emergency, intensive care and inpatient services. The global missed care index corresponded to M=7.45 (SD=10.74); the highest missed care index was found in the dimension basic care interventions (M=13.02, SD=17.60). The main factor contributing to the care missed was human resources (M=56.13, SD=21.38). The factors related to the care missed were human resources (rs =0.408, p<0.001) and communication (rs =0.418, p<0.001). Conclusions: the nursing care missed is mainly due to the human resource factor; these study findings will permit the strengthening of nursing care continuity. Descriptors: Nursing Care; Patient Care; Human Resources; Communication; Hospitals, Private

Fatores que influenciam o cuidado de enfermagem omitido em pacientes de um hospital particular

Objetivo: determinar os fatores que influenciam o cuidado de enfermagem omitido em pacientes hospitalizados. Método: estudo descritivo correlacional, desenvolvido em um hospital particular do México. Para identificar o cuidado omitido e fatores relacionados, utilizou-se o instrumento MISSCARE, que mede o cuidado omitido e os fatores associados. O cuidado omitido e os fatores foram agrupados em índices globais e por dimensões. Para fins de análise, foi utilizada estatística descritiva, correlação de Spearman e regressão linear simples. O estudo recebeu aprovação de comité de ética. Resultados: participaram 71 enfermeiras dos serviços de urgências, terapia intensiva e hospitalização. O índice global de cuidado omitido mostrou um coeficiente M=7,45 (DE=10,74); o índice com maior cuidado omitido correspondeu à dimensão de intervenções de cuidado básico (M=13,02, DE=17,60). O principal fator que contribuiu ao cuidado omitido foi o de recursos humanos (M=56,13, DE=21,38). Os fatores relacionados ao cuidado omitido foram os recursos humanos (rs=0,408, pObjetivo: determinar los factores que influyen en el cuidado de enfermería perdido en pacientes hospitalizados. Método: estudio descriptivo correlacional, se realizó en un hospital privado de México. Para identificar el cuidado perdido y factores relacionados se utilizó el instrumento MISSCARE que mide el cuidado perdido y los factores asociados. El cuidado perdido y los factores se agruparon en índices globales y por dimensiones. Para el análisis se utilizó estadística descriptiva, correlación de Spearman y regresión lineal simple. El estudio fue aprobado por el comité de ética. Resultados: participaron 71 enfermeras de los servicios de urgencias, terapia intensiva y hospitalización. El índice global de cuidado perdido mostró una M=7,45 (DE=10,74); el índice con mayor cuidado perdido correspondió a la dimensión de intervenciones de cuidado básico (M=13,02, DE=17,60). El principal factor que contribuyó en el cuidado perdido, fue el de recursos humanos (M=56,13, DE=21,38). Los factores relacionados con el cuidado perdido fueron los de recursos humanos (rs=0,408, pObjective: to determine the factors that influence the missed nursing care in hospitalized patients. Methods: descriptive correlational study developed at a private hospital in Mexico. To identify the missed nursing care and related factors, the MISSCARE survey was used, which measures the care missed and associated factors. The care missed and the factors were grouped in global and dimension rates. For the analysis, descriptive statistics, Spearman’s correlation and simple linear regression were used. Approval for the study was obtained from the ethics committee. Results: the participants were 71 nurses from emergency, intensive care and inpatient services. The global missed care index corresponded to M=7.45 (SD=10.74); the highest missed care index was found in the dimension basic care interventions (M=13.02, SD=17.60). The main factor contributing to the care missed was human resources (M=56.13, SD=21.38). The factors related to the care missed were human resources (rs=0.408,

Bronchogenic cysts. Importance of infection in adults. Study of 12 cases

AbstractBackgroundBronchogenic cyst is a rare congenital malformation and commonly located in the mediastinum and lung parenchyma.ObjectiveTo determine the clinical characteristics of the patients with diagnosis of bronchogenic cysts, their location and the infectious bacteria when the cysts are infected. The cases were collected from 1st January 2005 to 1st January 2013, in a third level hospital.Material and methodsThe cases with bronchogenic cysts resected by thoracotomy were confirmed by histological study. Age, sex, admission diagnosis, location, size, imagenologic studies, and bacteriological cultures were evaluated.ResultsOf the12 cases with diagnosis of bronchogenic cysts surgically resected by thoracotomy, six were male and six female, with 50% located in lung parenchyma and 50% in mediastinum, one of the latter was para-oesophageal. Bacteriological study of the cystic content demonstrated bacterial infection in seven (58%) cases.ConclusionsBronchogenic cysts are rare congenital benign lesions. They must be resected because their content might be infected. The histopathology study is necessary to confirm the diagnosis, together with bacteriological examination. Thoracotomy is a safe procedure to resect bronchogenic cysts

Dimension of the intersection of a pair of orthogonal groups

Let $g,h\colon V\times V\rightarrow mathbb{C}$ be two non-degenerate symmetric bilinear forms on a finite-dimensional complex vector space $V$. Let $G$ (resp.\ $H$) be the Lie group of isometries of $g$ (resp.\ $h$). If the endomorphism $L\colon \rightarrow V$ associated to $g,h$ is diagonalizable, then the dimension of the intersection group $G\cap H$ is computed in terms of the dimensions of the eigenspaces of $L$.Peer reviewe

Self-adaptive strategy based on fuzzy control systems for improving performance in wireless sensors networks

The solutions to cope with new challenges that societies have to face nowadays involve providing smarter daily systems. To achieve this, technology has to evolve and leverage physical systems automatic interactions, with less human intervention. Technological paradigms like Internet of Things (IoT) and Cyber-Physical Systems (CPS) are providing reference models, architectures, approaches and tools that are to support cross-domain solutions. Thus, CPS based solutions will be applied in different application domains like e-Health, Smart Grid, Smart Transportation and so on, to assure the expected response from a complex system that relies on the smooth interaction and cooperation of diverse networked physical systems. The Wireless Sensors Networks (WSN) are a well-known wireless technology that are part of large CPS. The WSN aims at monitoring a physical system, object, (e.g., the environmental condition of a cargo container), and relaying data to the targeted processing element. The WSN communication reliability, as well as a restrained energy consumption, are expected features in a WSN. This paper shows the results obtained in a real WSN deployment, based on SunSPOT nodes, which carries out a fuzzy based control strategy to improve energy consumption while keeping communication reliability and computational resources usage among boundaries