Shape Optimization For Parabolic Troughs Working In Non-Ideal Conditions

AbstractThe aim to realize more efficient solar concentrators, improves the research on the best configuration for the mirror surfaces. The optical behavior of a parabolic trough collector is investigated depending on its particular shape outside the ideal conditions. A 2D ray-tracing model of the real systems was realised taking into account a reference value for the solar radiation and different misalignment errors between the light beams and the mirrors axis.The computational analysis shows the relationship among the collection performance and the main geometrical parameters; different boundary conditions bring to consider different optimal configurations for the concentrator shape. Generally for medium concentration levels (50-150x) and non-ideal settings the more efficient parabolas are not characterized by a rim angle equal to 90°, which is the theoretical best value.Among the studied cases, it is interesting to note that a possible working condition for the PT system corresponds to a light beam scattering of 0.5° and a tracking misalignment of 0.2°.With these constrains, imposing high optical performance requirements, a maximum concentration ratio near to 60 can be reached with rim angle values of about 114°

Educational intervention on malignant hyperthermia with nursing professionals of the operating room

OBJECTIVE To evaluate the effectiveness of an educational intervention on malignant hyperthermia with operating room nurses. METHOD A quasi-experimental study, aimed at an educational intervention of short duration with the nursing staff in the operating room of the institution hosting the research in the city of São Paulo, with the participation of 96 professionals. Pre-intervention tests and post-intervention tests were applied, which consisted of a lecture followed by simulation. RESULTS Considering the overall results of the intervention, there was a statistically significant difference (pOBJETIVO Avaliar a efetividade de uma intervenção educativa sobre a hipertermia maligna com profissionais de enfermagem do centro cirúrgico. MÉTODO Estudo quase-experimental, voltado a uma intervenção educativa de curta duração com a equipe de enfermagem do centro cirúrgico da instituição-sede da pesquisa, situada na cidade de São Paulo, com a participação de 96 profissionais. Foram aplicados pré e pós-teste à intervenção, que consistiu em aula expositiva seguida de simulação. RESULTADOS Considerando-se os resultados globais da intervenção, houve diferença estatística significativa (pOBJETIVO Evaluar la efectividad de una intervención educativa acerca de la hipertermia maligna con profesionales de enfermería del quirófano. MÉTODO Estudio casi experimental, volcado a una intervención educativa de corta duración con el equipo de enfermería del quirófano de la institución sede de la investigación, ubicada en la ciudad de São Paulo, con la participación de 96 profesionales. Se aplicaron pre y post prueba a la intervención, que consistió en clase expositiva seguida de simulación. RESULTADOS Considerándose los resultados globales de la intervención, hubo diferencia estadística significativa (

"Incubadora dos Direitos Sociais - Patronato": uma análise do subprograma no Município de Londrina (PR)

Anais do 35º Seminário de Extensão Universitária da Região Sul - Área temática: Direitos Humanos e Justiça / EducaçãoEste trabalho tem como objetivo analisar o Subprograma: Incubadora dos Direitos Sociais – PATRONATO no município de Londrina. Através da pesquisa qualitativa, o estudo apresenta o percurso do Subprograma desde a sua implementação, bem como, as atividades das áreas envolvidas e relevância de sua permanência no município. Para tanto, conclui que é necessário haver uma readequação em determinadas exigências do Subprograma, bem como, destaca a importância de uma Política Pública para o Regime Abert

Sistema de control interno para optimizar los procesos del área de tesorería en la Municipalidad Provincial de Lambayeque, 2019.

En la investigación denominada “Sistema de Control Interno para optimizar los procesos del área de Tesorería en la Municipalidad Provincial de Lambayeque, 2019”, se evaluaron los procesos que se vienen llevando a cabo en esta entidad edil, específicamente en el Área de Tesorería, que es donde se han detectado algunas inconsistencias y no pocas irregularidades cometidas por sus funcionarios y trabajadores en relación con los recursos directamente recaudados y de aquellos transferidos por el Ministerio de Economía y Finanzas por concepto de FONCOMUN, Vaso de Leche u otros programas sociales. La investigación permitió establecer que muchos de los procesos son demasiado lentos y engorrosos, a pesar de que cuentan con un Manual de Organización y Funciones y con el correspondiente Texto Único de Procedimientos Administrativos – TUPA. En tal sentido, el problema de investigación quedó formulado ¿De qué manera el Sistema de Control Interno optimizará los procesos del Área de Tesorería de la Municipalidad de Lambayeque, 2019?, en tanto se Justificó porque a través de ella se llegó a determinar la incidencia que tendrá el Control Interno en las operaciones realizadas a los procesos operativos del Área de Tesorería. La Hipótesis confirmó que el Sistema de Control Interno optimizará tales procesos, mientras que el Objetivo general fue aplicar un Sistema de Control Interno para optimizar los procesos en dicha área. La investigación fue del tipo Descriptiva porque implico la observación sistemática del objeto de estudio y el Diseño de investigación fue del tipo No experimental.TesisGestión empresarial y emprendimient

A cholinergic-sympathetic pathway primes immunity in hypertension and mediates brain-to-spleen communication

The crucial role of the immune system in hypertension is now widely recognized. We previously reported that hypertensive challenges couple the nervous drive with immune system activation, but the physiological and molecular mechanisms of this connection are unknown. Here, we show that hypertensive challenges activate splenic sympathetic nerve discharge to prime immune response. More specifically, a vagus-splenic nerve drive, mediated by nicotinic cholinergic receptors, links the brain and spleen. The sympathetic discharge induced by hypertensive stimuli was absent in both coeliac vagotomized mice and in mice lacking α7nAChR, a receptor typically expressed by peripheral ganglionic neurons. This cholinergic-sympathetic pathway is necessary for T cell activation and egression on hypertensive challenges. In addition, we show that selectively thermoablating the splenic nerve prevents T cell egression and protects against hypertension. This novel experimental procedure for selective splenic denervation suggests new clinical strategies for resistant hypertension

ANÁLISIS PARA OPTIMIZAR LOS PROCESOS DEL ÁREA DE TESORERÍA EN LA MUNICIPALIDAD PROVINCIAL DE LAMBAYEQUE, 2019

En la investigación denominada “Análisis para optimizar los procesos del área de Tesorería en la Municipalidad Provincial de Lambayeque, 2019”, se evaluaron los procesos que se vienen llevando a cabo en esta entidad edil, específicamente en el Área de Tesorería, que es donde se han detectado algunas inconsistencias y no pocas irregularidades cometidas por sus funcionarios y trabajadores en relación con los recursos directamente recaudados y de aquellos transferidos por el Ministerio de Economía y Finanzas por concepto de FONCOMUN, Vaso de Leche u otros programas sociales. La investigación permitió establecer que muchos de los procesos son demasiado lentos y engorrosos, a pesar de que cuentan con un Manual de Organización y Funciones y con el correspondiente Texto Único de Procedimientos Administrativos – TUPA. En tal sentido, el problema de investigación quedó formulado ¿De qué manera se ejecutan los procesos del Área de Tesorería en la Municipalidad Provincial de Lambayeque, 2019?, en tanto se Justificó porque a través de ella se llegó a determinar de qué manera se vienen llevando a cabo las operaciones ejecutadas a los procesos operativos del Área de Tesorería de la Municipalidad Provincial de Lambayeque, mientras que el Objetivo general describir los procesos del Área de Tesorería de la Municipalidad Provincial de Lambayeque, 2019. La investigación fue del tipo Descriptiva porque implico la observación sistemática del objeto de estudio y el Diseño de investigación fue del tipo No experimental.Trabajo de investigació

Structured Light Profilometry on m-PTC

In concentrating solar systems, it is essential to study the optical losses of the collectors. A fundamental parameter is the intercept factor, namely, the fraction of sunrays reflected by the concentrator that reaches the receiver. Optical profilometry studies the relationship between the collector profile and the intercept factor, which influences the collection efficiency. Profilometric analyses were performed on a micro-parabolic trough collector (m-PTC), with reduced sizes and greater mirror curvature than a usual PTC. The proposed technique projects a luminous pattern (structured light) both on the collector with an opaque covering and on a flat reference plane. Measurement set-up and calibration technique were developed for m-PTC. A program coded in Python analyzed the images and reconstructs the mirror profile. The tilted reference plane was reconstructed using an original geometric model and a calibration procedure. The focal length of each parabolic section was calculated, providing information on surface defects in the mirror. An important parameter obtained was the displacement of the focus of the parabola with respect to the ideal position. Using this value, the intercept factor was estimated to be 0.89. The proposed technique was validated by comparing the results with an independent profilometric study applied to the same m-PTC

Temporomandibular disorders among Brazilian adolescents: reliability and validity of a screening questionnaire

Temporomandibular disorders (TMD) screeners assume significant item overlap with the screening questionnaire proposed by the American Academy of Orofacial Pain (AAOP). Objective: To test the reliability and validity of the Portuguese version of AAOP questions for TMD screening among adolescents. Material and Methods: Diagnoses from Research Diagnostic Criteria for Temporomandibular Disorders (RDC/TMD) Axis I were used as reference standard. Reliability was evaluated by internal consistency (KR-20) and inter-item correlation. Validity was tested by sensitivity, specificity, predictive values, accuracy and receiver operating characteristic (ROC) curves, the relationship between the true-positive rate (sensitivity) and the false-positive rate (specificity). Test-retest reliability of AAOP questions and intra-examiner reproducibility of RDC/TMD Axis I were tested with kappa statistics. Results: The sample consisted of 1307 Brazilian adolescents (56.8% girls; n=742), with mean age of 12.72 years (12.69 F/12.75 M). According to RDC/TMD, 397 [30.4% (32.7% F/27.3% M)] of adolescents presented TMD, of which 330 [25.2% (27.6% F/22.2% M)] were painful TMD. Because of low consistency, items #8 and #10 of the AAOP questionnaire were excluded. Remaining items (of the long questionnaire version) showed good consistency and validity for three positive responses or more. After logistic regression, items #4, #6, #7 and #9 also showed satisfactory consistency and validity for two or more positive responses (short questionnaire version). Both versions demonstrated excellent specificity (about 90%), but higher sensitivity for detecting painful TMD (78.2%). Better reproducibility was obtained for the short version (k=0.840). Conclusions: The Portuguese version of AAOP questions showed both good reliability and validity for the screening of TMD among adolescents, especially painful TMD, according to RDC/TMD