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Search Results: 1 - 10 of 32735 matches for " Daniel;Lavarda "
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Vibration energy harvesting using piezoelectric transducer and non-controlled rectifiers circuits
Motter, Daniel;Lavarda, Jairo Vinícius;Dias, Felipe Aguiar;Silva, Samuel da;
Journal of the Brazilian Society of Mechanical Sciences and Engineering , 2012, DOI: 10.1590/S1678-58782012000500006
Abstract: vibration energy harvesting with piezoelectric materials is of practical interest because of the demand for wireless sensing devices and low-power portable electronics without external power supply. for practical use of vibration energy harvester with piezoelectric materials, it is necessary to process the alternating current (ac) by using different rectifiers' circuits in order to charge batteries with direct current (dc) or to feed electronic devices. unfortunately, most of the models used focused on simplifying the energy harvesting circuit into a simple resistive load. in the real-world applications, the energy harvesting external circuit is more complex than a simple load resistance. in this sense, the goal of the present paper is to describe a comprehensive strategy for power harvesting device to estimate the output power provided by a cantilever beam with the electrodes of the piezoceramic layers connected to a standard rectifier circuit. the true electrical components were considered in the full-wave rectifier circuit with four diodes in bridge. a very simple and comprehensive description for choosing the capacitance and resistance loads is provided. in order to illustrate the results, numerical simulations and experimental verifications are also performed to ensure the accuracy. all tests and results are described and detailed using matlab, the simpowersystem toolbox of the simulink and an experimental setup.
A dêixis como um "complicador/facilitador" no contexto cognitivo e lingüístico em ambiente educacional face aos alunos com deficiência visual
Lavarda, Santa Terezinha Falcade;Bidarra, Jorge;
Revista Brasileira de Educa??o Especial , 2007, DOI: 10.1590/S1413-65382007000300002
Abstract: deixis means the linguistic referencing expression the function of which is to relate, during the act of enunciation, certain grammatical units to space-time coordinates. the use of deictics throughout oral exposition is a very frequent and usually essential device. in this article, the starting point for the observation are teachers' enunciations in the classroom, considered generically. in these speeches, we have identified that the use of deictics, especially spatial ones, constitutes a serious problem when not carefully and attentively dealt with by the teacher. based on this phenomenon, we have carried out a theoretical discussion, still in preliminary stages, on deixis and on its impact on a very particular audience, made up of students with visual disability. this paper presents a theoretical review of the categories and objects of discourse by means of which the subjects understand the world.
RETROSPECTIVA BIBLIOGRáFICA SOBRE O BALANCED SCORECARD (BSC) COMO INSTRUMENTO DE PLANEJAMENTO E CONTROLE NAS EMPRESAS
Irani Rocha,Carlos Eduardo Facin Lavarda
Revista de Contabilidade do Mestrado em Ciências Contábeis da UERJ , 2011,
Abstract: O estudo busca investigar o uso do Balanced Scorecard (BSC) como instrumento que facilita o processo de planejamento e controle nas empresas, especificamente no ajuste entre os objetivos estratégicos e os planos operacionais, identificando as causas de seu fracasso e/ou sucesso, por meio da análise de trabalhos publicados em anais de congressos e revistas brasileiras. Trata-se de um estudo ilustrativo com aplica o de ferramentas básicas de infometria, bibliometria e cienciometria, com características descritivas e bibliográficas e uma abordagem qualitativa dos dados. Foram investigados 2.439 artigos que abordavam a avalia o de desempenho, no título, resumo e palavras-chave. Destes, selecionou-se 71 artigos que apresentaram as terminologias: Balanced Scorecard e BSC que realizavam estudos empíricos. Entre os resultados, constatou-se que os principais fatores que facilitam ou inibem a implanta o da ferramenta de medi o de desempenho (BSC) nas organiza es s o a cultura organizacional, a prepara o e motiva o dos colaboradores, o empenho e envolvimento da alta administra o.
Febrifugine derivative antimalarial activity: quantum mechanical predictors
Autreto, Pedro Alves da Silva;Lavarda, Francisco Carlos;
Revista do Instituto de Medicina Tropical de S?o Paulo , 2008, DOI: 10.1590/S0036-46652008000100005
Abstract: plasmodium falciparum resistant strain development has encouraged the search for new antimalarial drugs. febrifugine is a natural substance with high activity against p. falciparum presenting strong emetic property and liver toxicity, which prevent it from being used as a clinical drug. the search for analogues that could have a better clinical performance is a current topic. we aim to investigate the theoretical electronic structure by means of febrifugine derivative family semi-empirical molecular orbital calculations, seeking the electronic indexes that could help the design of new efficient derivatives. the theoretical results show there is a clustering in well-defined ranges of several electronic indexes of the most selective molecules. the model proposed for achieving high selectivity was tested with success.
Factores procoagulantes en pacientes con cáncer Procoagulant factors in patients with cancer
Soledad Molnar,Hugo Guglielmone,Marcelo Lavarda,María Laura Rizzi
Acta bioqu?-mica cl?-nica latinoamericana , 2006,
Abstract: El objetivo del presente estudio fue determinar los niveles de factor tisular (FT) y procoagulante del cáncer (PC) en pacientes con enfermedades neoplásicas para intentar establecer: 1) si existe asociación entre la presencia de estos marcadores y el origen del tumor; 2) si los niveles de estas proteínas procoagulantes se correlacionan con los estadíos I/II o III/IV de la enfermedad; 3) si los tratamientos con quimioterapia modifican los niveles séricos del FT y PC y, finalmente 4) evaluar si estos procoagulantes podrían comportarse como marcadores predictivos en el desarrollo de trombosis. Se incluyeron 61 pacientes con diferentes tipos de cáncer: pulmón (n=14), mama (n=19), digestivo (n=13) y génitourinario (n=12) y controles normales (n=20). Los resultados demostraron una sensibilidad y especificidad del 87,9% y 85%, respectivamente, para el PC y del 72,4% y 100% para el FT. Los pacientes con cáncer génitourinario presentaron los valores más altos de ambos procoagulantes coincidiendo con la mayor prevalencia de trombosis objetivada clínica y radiológicamente. Ninguno de los procoagulantes evaluados permitió diferenciar estadío I-II de III-IV de la enfermedad. Por otra parte, el tratamiento con quimioterapia no modificó, con significancia estadística, los niveles de ambos procoagulantes. Un seguimiento clínico y de laboratorio en función del tiempo y del tratamiento sería importante para establecer el valor pronóstico de los niveles de estos procoagulantes y su propensión a desarrollar trombosis en pacientes con cáncer. The objectives of the present study were to determine the tissue factor (FT) and cancer procoagulant (PC) levels in patients with neoplasic diseases in order to establish: 1) if there is association between the presence of both markers and the tumor origin; 2) if the levels of these procoagulant proteins are correlated with stages I/II or III/IV of the disease; 3) if treatment with chemotherapy modifies the FT and PC serum levels and, finally 4) to evaluate if these procoagulants could be used as predictive markers in thrombosis development . Sixty-one patients with different types of cancer were included: lung (n=14), breast (n=19), digestive (n=13) and genitourinary (n=12) and normal controls (n=20). The results demonstrated a sensitivity and specificity of 87.9% and 85% for PC and of 72.4% and 100% for FT, respectively. Patients with genitourinary cancer displayed the highest values of both procoagulants in agreement with the greatest prevalence of thrombosis observed in this group. None of them enabled differentiation between stage
PARADIGMAS DE INVESTIGACIóN EN CONTABILIDAD DE GESTIóN
Carlos Eduardo Facin Lavarda,Mercedes Barrachina,Vicente M. Ripoll Feliu
Revista de Contabilidade do Mestrado em Ciências Contábeis da UERJ , 2008,
Abstract: Los estudios realizados sobre la evolución de la investigación contable evidencian que las publicaciones en las principales revistas contables, se ubican en el paradigma funcionalista, siendo la corriente dominante en nuestros días, privilegiando todavía, por tanto, las conclusiones obtenidas a través de métodos estadístico – cuantitativos. Con el objetivo de entender el estado actual de la investigación en Contabilidad de Gestión, el artículo lleva a examinar los paradigmas de investigación que subyacen en la misma, para de esta forma sea posible explicar las diferencias existentes entre las diversas elecciones teóricas y/o metodológicas adoptadas a lo largo de la historia de la investigación en Contabilidad de Gestión. Así, se propone una discusión presentada en primer lugar por Larrinaga (1999) sobre la cuestión de que la investigación alternativa a la corriente principal explica mejor el funcionamiento de la contabilidad de gestión, basada en ideas filosóficas vigentes y consistentes internamente.
LITERATURE REVIEW ON BUDGET IN FIVE YEARS IN INTERNATIONAL JOURNALS FROM 2000 TO 2009 REVISIóN DE LA LITERATURA SOBRE EL PRESUPUESTO EN CINCO PERIóDICOS INTERNACIONALES DESDE EL A O 2000 HASTA EL 2009 REVIS O DA LITERATURA SOBRE OR AMENTO EM CINCO PERIóDICOS INTERNACIONAIS NOS ANOS DE 2000 ATé 2009
Giancarlo Gomes,Carlos Eduardo Facin Lavarda,Edson Wilson Torrens
Rege : Revista de Gest?o , 2013,
Abstract: This article analyzed the scientific production budget in the literature. The budget is a combination of information flow, administrative processes and procedures which are part of the short-term planning and control system of an organization. Regarding the research plan, this work is characterized as descriptive, longitudinal, and as a means of documentary research. The research is of type desk research and sought publications in a period between 2000 and 2009. It was found that over a period of 10 years, there were 40 international and 11 national papers dealing with budget. Stands a concentration of publications in the journal Organization & Accounting Society. The year 2000 had the highest number of publications. Most of the articles were undertaken by one or two authors. The survey was the predominant type of research. The work that has figured more times the references of these articles was "Participative Budgeting: The Effects of Risk Aversion and Asymmetric Information on Budgetary Slack" the researcher Mark S. Young (1995). Although referenced less often, the books still figured as the second largest source of research, highlighting the most of them referenced Multiple Regression in Behavioral Research author Elazar Pedhazur (1982) with five references. The issue in Brazil is incipient in relation to the amount of work done abroad. El presente artículo analizó la producción científica en el área de presupuesto en la literatura internacional. El presupuesto es una combinación de flujo de información, procesos y procedimientos administrativos, los cuales son parte integrante del planeamiento de corto plazo y del sistema de control de una organización. En relación al plano de investigación, este trabajo se caracteriza como descriptivo, longitudinal y teniendo como forma la investigación documental. La investigación es del tipo desk research, abarcando un período de publicaciones entre 2000 y 2009. Se verificó que en un período de 10 a os fueron publicados 40 trabajos internacionales y 11 nacionales sobre presupuesto. Se destaca una concentración de publicaciones en el periódico Accounting Organization & Society. El a o de 2000 presentó la mayor cantidad de publicaciones. La mayor parte de los artículos fue desarrollada por uno o dos autores. La investigación predominante fue del tipo levantamiento. La obra que figuró más veces en el referencial de esos artículos fue Participative Budgeting: The Effects of Risk Aversion and Asymmetric Information on Budgetary Slack, del investigador Mark S. Young (1985). A pesar de aparecer en las referencias meno
Atua o do gerente intermediário no processo de formula o e implanta o da estratégia: um estudo de caso
Fábio Franzon,Denise de Oliveira,Rosalia Aldraci Barbosa Lavarda
Revista Brasileira de Administra??o Científica , 2012, DOI: 10.6008/ess2179-684x.2012.003.0009
Abstract: O objetivo deste estudo foi identificar a atua o do gerente intermediário no processo de formula o e implanta o da estratégia. Com o entendimento de que a gerência intermediária pode e deve participar ativamente do "pensar" e do “fazer” estratégia, elaborou-se a quest o de pesquisa: Como atuam os gerentes de nível intermediário no processo de formula o e implanta o da estratégia da organiza o? Foi desenvolvida uma pesquisa qualitativa por meio de estudo de caso. Os dados foram coletados utilizando-se a técnica de entrevistas semi-estruturadas, análise de documentos e observa o direta. Após análise dos dados identificou-se que os gerentes de nível intermediário têm papel determinante tanto na formula o quanto na implanta o da estratégia da organiza o, independente destas serem deliberadas ou emergentes. Este nível gerencial conduz as estratégias do nível operacional à alta gerência e vice-versa, sendo determinante na formula o das mesmas. Na implanta o, a gerência intermediária atua como um elo por onde perpassa um fluxo intenso de relacionamentos com o nível operacional, com a alta gerência e entre os próprios gerentes intermediários, facilitando a implanta o das respectivas estratégias. A gerência intermediária é o nível organizacional que mais se relaciona com os demais níveis organizacionais da Institui o, confirmando a proposi o de que o gerente de nível intermediário desempenha o papel de sintetizador da informa o e defensor de alternativas no processo de formula o da estratégia e desempenha o papel de facilitador da adaptabilidade e implementador da estratégia.
Motivos de Cambio de los Sistemas Contables de Gestión en las Peque as Empresas
Carlos Eduardo Facin Lavarda,Mercedes Barrachina Palanca,Vicente Ripoll Feliu
Contabilidade Vista & Revista , 2010,
Abstract: Los motivos de cambio en los Sistemas Contables de Gestión (SCG) están generalmente asociados con la búsqueda de una mejora en la salud empresarial, o por cuestiones de competitividad. Desde un punto de vista holista, introduciendo implicaciones sociales, políticas y culturales en el fenómeno estudiado, tenemos también la cuestión de la necesidad de legitimación o reconocimiento de la organización en su entorno. Por ello, el objetivo del estudio es analizar los motivos que llevan las peque as y medianas empresas (PYME) a cambiar sus SCG. Esto se va a alcanzar a través de un abordaje cualitativo utilizándose del estudio de caso. Los resultados muestran que las empresas afrontaron problemas como: la pérdida de márgenes de beneficios, la necesidad de orientación hacia los resultados, el análisis estratégico, sobrellevar la crisis en las ventas en el mercado externo, la necesidad de reducir costes, la intensidad competitiva desde los países de costes más bajos, y en los cambios en el mercado internacional de divisas.
Factores procoagulantes en pacientes con cáncer
Molnar,Soledad; Guglielmone,Hugo; Lavarda,Marcelo; Rizzi,María Laura; Jarchum,Gustavo;
Acta bioqu?-mica cl?-nica latinoamericana , 2006,
Abstract: the objectives of the present study were to determine the tissue factor (ft) and cancer procoagulant (pc) levels in patients with neoplasic diseases in order to establish: 1) if there is association between the presence of both markers and the tumor origin; 2) if the levels of these procoagulant proteins are correlated with stages i/ii or iii/iv of the disease; 3) if treatment with chemotherapy modifies the ft and pc serum levels and, finally 4) to evaluate if these procoagulants could be used as predictive markers in thrombosis development . sixty-one patients with different types of cancer were included: lung (n=14), breast (n=19), digestive (n=13) and genitourinary (n=12) and normal controls (n=20). the results demonstrated a sensitivity and specificity of 87.9% and 85% for pc and of 72.4% and 100% for ft, respectively. patients with genitourinary cancer displayed the highest values of both procoagulants in agreement with the greatest prevalence of thrombosis observed in this group. none of them enabled differentiation between stages i-ii and iii-iv of the disease. on the other hand, the chemotherapy treatment did not modify the levels of any procoagulant. a clinical and laboratory follow-up based on the treatment would be important in order to establish the value of these procoagulants levels and their propensity to develop thrombosis in cancer patients.
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