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Search Results: 1 - 10 of 8711 matches for " Alex Sandro Keniti Okumura "
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Control of Hypothenemus hampei (FERRARI) on yards for coffee drying / Controle da broca-do-café (Hypothenemus hampei) FERRARI em terreiros de secagem de café
Alex Sandro Keniti Okumura,Pedro Manuel Oliveira Janeiro Neves,Anelize Fernanda Possagnolo,Viviane R. Chocorosqui
Semina : Ciências Agrárias , 2003,
Abstract: The coffee borer (Hypothenemus hampei), one of the main pests affecting coffee fruits under favorable conditions for development, can contribute to a reduction in productivity. The control of this insect is basically chemical, causing environmental, food and farmer contamination. Thus, alternatives must be found to reduce the use of chemical insecticides in the control of this insect. The objective of this work was to analyze, in a coffee drying area: 1) the capture efficiency of traps placed at different heights: 0, 35 and 70 cm; 2) the period of greatest collection (0 to 96 hrs) and 3) the effect of Beauveria bassiana spraying, in two concentrations, on the coffee fruits. Traps were placed around the area, and the insects were collected at 24, 48, 72,and 96 hours. At the same time, the drying fruits were sprayed with two concentrations of B. bassiana to evaluate the mortality rate caused by the fungus found in the emerged borer. Results showed no significant difference regarding the capture of the insects in the traps placed at different heights, and the 48 hour interval registered the highest number of borers collected. The highest fungus concentration (1 x 1011 canidia/ml) caused a mortality rate, attested by B. bassiana of approximately 50% of the emerged borers. A broca-do-cafeeiro (Hypothenemus hampei) é uma das principais pragas pelo ataque aos frutos que, sob condi es favoráveis ao seu desenvolvimento, pode contribuir para redu o da produtividade. O principal método de controle deste inseto é químico, provocando a contamina o ambiental dos alimentos e do agricultor. Assim, alternativas devem ser pesquisadas visando diminuir o uso de inseticidas químicos. O objetivo deste trabalho foi analisar, no terreiro de secagem, a eficiência de captura das armadilhas em diferentes alturas (0, 35 e 70 cm); o período de maior captura (0-96 h) e o efeito da pulveriza o de Beauveria bassiana, em duas concentra es, sobre os frutos de café, visando o controle da broca. As armadilhas foram distribuídas em volta do terreiro, sendo os insetos coletados às 24, 48, 72 e 96 horas. Paralelamente, foram pulverizadas, nos frutos em secagem no terreiro, duas concentra es de B. bassiana avaliando-se a mortalidade provocada pelo fungo nas brocas emergidas. Os resultados obtidos mostraram que n o houve diferen a significativa quanto à captura dos insetos nas diferentes alturas das armadilhas e no intervalo de 24-48 horas foi coletado o maior número de brocas. A maior concentra o do fungo (1 x 1011 conídios/ml) promoveu mortalidade confirmada por B. bassiana de aproxim
An Innovative Approach for Attribute Reduction in Rough Set Theory  [PDF]
Alex Sandro Aguiar Pessoa, Stephan Stephany
Intelligent Information Management (IIM) , 2014, DOI: 10.4236/iim.2014.65022
Abstract:

The Rough Sets Theory is used in data mining with emphasis on the treatment of uncertain or vague information. In the case of classification, this theory implicitly calculates reducts of the full set of attributes, eliminating those that are redundant or meaningless. Such reducts may even serve as input to other classifiers other than Rough Sets. The typical high dimensionality of current databases precludes the use of greedy methods to find optimal or suboptimal reducts in the search space and requires the use of stochastic methods. In this context, the calculation of reducts is typically performed by a genetic algorithm, but other metaheuristics have been proposed with better performance. This work proposes the innovative use of two known metaheuristics for this calculation, the Variable Neighborhood Search, the Variable Neighborhood Descent, besides a third heuristic called Decrescent Cardinality Search. The last one is a new heuristic specifically proposed for reduct calculation. Considering some databases commonly found in the literature of the area, the reducts that have been obtained present lower cardinality, i.e., a lower number of attributes.

REFERENCIAL TEóRICO CONSTRUTIVISTA PARA AVALIA O DE SOFTWARE EDUCATIVO
Alex Sandro Gomes
Revista Brasileira de Informática na Educa??o , 2009,
Abstract: Este artigo apresenta um referencial teórico de base construtivista para orientar a avalia o e o design de interfaces educativas com envolvimento de usuários. Ilustramos a aplica o desse referencial com um estudo de caso no qual analisamos qualitativamente o impacto na aprendizagem que ocorre durante o uso de um software para o ensino da Geometria. Os resultados obtidos permitem concluir sobre a eficácia dainterface de um software educativo serve como elemento mediador à constru o de situa es significativas para a aprendizagem de conceitos específicos.
Informa??es: a busca da evidencia??o ideal
Oliveira, Alex-Sandro Macêdo de;
Caderno de Estudos , 1998, DOI: 10.1590/S1413-92511998000300002
Abstract: as informa??es devem ser evidenciadas, de modo a propiciar condi??es para que os usuários possam tomar decis?es acertadas. as subjetividades sobre quais e quantas informa??es seriam necessárias causam discórdias entre os pesquisadores da contabilidade. alguns defendem que todas as informa??es deveriam estar disponíveis através da utiliza??o de um banco de dados flexível e outros defendem um numero limitado, afirmando que muitas informa??es causam confus?es. mais dois fatores. a serem observados, relacionam-se com as características que devem ter as informa??es para serem evidenciadas, quais sejam: materialidade e relevancia. existe um conjunto básico de informa??es que interessa a todos os tipos de usuários, que s?o relatados nos demonstrativos formais. contudo, há uma necessidade de consubstanciar o poder informativo dos mesmos, através da evidencia??o de demonstrativos complementares, como o demonstrativo de fluxo de caixa, demonstrativo do valor adicionado e outras informa??es julgadas necessárias como o goodwill, leasing, etc.
Aprendizagem organizacional na área de suprimentos: um estudo na área de saúde do sul do Brasil [doi: 10.5329/RECADM.20111002002]
Alex Sandro Quadros Weymer,Ubirat? Tortato
Revista Eletr?nica de Ciência Administrativa - RECADM , 2011, DOI: 10.5329/971
Abstract: APRENDIZAGEM ORGANIZACIONAL NA áREA DE SUPRIMENTOS: UM ESTUDO NA áREA DE SAúDE DO SUL DO BRASIL RESUMO O objetivo deste artigo é identificar de que maneira a aprendizagem organizacional acontece na área de suprimentos da Unidade de Negócios da área da saúde de uma Holding do sul do Brasil, a partir de uma reestrutura o corporativa. Para atingir esse objetivo, foram entrevistados todos os gestores responsáveis pelos principais processos da cadeia de suprimentos e, após a transcri o literal das entrevistas, os dados foram tratados e analisados com o apoio do software computacional Atlas TI. Os resultados apontam para um esfor o significativo rumo à profissionaliza o da gest o de suprimentos com um viés baseado na lógica da indústria da produ o de bens de consumo, levando em considera o as peculiaridades da área da saúde, que buscam o constante equilíbrio entre a otimiza o dos custos com a entrega de servi os e produtos de qualidade. Palavras-Chave Cadeia de suprimentos, Aprendizagem organizacional, Alinhamento estratégico. ORGANIZATIONAL LEARNING IN SUPPLY AREA: A STUDY IN THE FIELD OF HEALTH IN SOUTHERN BRAZIL ABSTRACT The aim of this paper is to identify how organizational learning happens in the supply area in the health unit of a holding company in southern Brazil, after a corporate restructuring. To achieve this objective, we interviewed all managers responsible for key supply chain processes and after transcription of the interviews, data were analyzed with the help of software Atlas TI. The results indicate a significant effort towards the professionalization of supply management with a bias based on the logic of industrial production of consumer goods, taking into account the peculiarities of the health field, looking for the constant balance between the optimization of costs service delivery and quality of products. Keywords Supply chain management, Organizational learning, Strategic alignment.
Physical Education: Adaptations and Benefits for Deaf Students  [PDF]
Clévia Fernanda Sies Barboza, Alex Sandro Lins Ramos, Paula Alvarez Abreu, Helena Carla Castro
Creative Education (CE) , 2019, DOI: 10.4236/ce.2019.104053
Abstract: Human development encompasses a relationship between genetics and environment factors including affective, social, cognitive and motor development. Physical activity can reduce the risk of several diseases also stimulating health promotion, feelings expression, formation of critical awareness, autonomy development, motivation for study and others. In case of deaf students, physical education also has other benefits, including social inclusion. Many challenges need to be overcome on adapted physical education for deaf students such as the lack of bilingual teachers and also the lack of specific signs of some important words for physical education. Herein we reviewed the benefits of physical activity for deaf children, highlighting some adaptations for helping on teaching and learning and development of this public.
Topographic Effects on Ambient Dose Equivalent Rates from Radiocesium Fallout
Alex Malins,Masahiko Okumura,Masahiko Machida,Kimiaki Saito
Physics , 2015,
Abstract: Land topography can affect air radiation dose rates by locating radiation sources closer to, or further from, detector locations when compared to perfectly flat terrain. Hills and slopes can also shield against the propagation of gamma rays. To understand the possible magnitude of topographic effects on air dose rates, this study presents calculations for ambient dose equivalent rates at a range of heights above the ground for varying land topographies. The geometries considered were angled ground at the intersection of two planar surfaces, which is a model for slopes neighboring flat land, and a simple conical geometry, representing settings from hilltops to valley bottoms. In each case the radiation source was radioactive cesium fallout, and the slope angle was varied systematically to determine the effect of topography on the air dose rate. Under the assumption of homogeneous fallout across the land surface, and for these geometries and detector locations, the dose rates at high altitudes are more strongly affected by the underlying land topography than those close to ground level. At a height of 300m, uneven topographies can lead to a 50% change in air dose rates compared to if the ground were uniformly flat. However, in practice the effect will more often than not be smaller than this, and heterogeneity in the source distribution is likely to be a more significant factor in determining local air dose rates.
Fields of View for Environmental Radioactivity
Alex Malins,Masahiko Okumura,Masahiko Machida,Hiroshi Takemiya,Kimiaki Saito
Physics , 2015,
Abstract: The gamma component of air radiation dose rates is a function of the amount and spread of radioactive nuclides in the environment. These radionuclides can be natural or anthropogenic in origin. The field of view describes the area of radionuclides on, or below, the ground that is responsible for determining the air dose rate, and hence correspondingly the external radiation exposure. This work describes Monte Carlo radiation transport calculations for the field of view under a variety of situations. Presented first are results for natural 40K and thorium and uranium series radionuclides distributed homogeneously within the ground. Results are then described for atmospheric radioactive caesium fallout, such as from the Fukushima Daiichi Nuclear Power Plant accident. Various stages of fallout evolution are considered through the depth distribution of 134Cs and 137Cs in soil. The fields of view for the natural radionuclides and radiocaesium are different. This can affect the responses of radiation monitors to these nuclides if the detector is partially shielded from the ground within its field of view. The field of view also sets the maximum reduction in air dose rates that can be achieved through local decontamination or remediation measures. This maximum efficiency can be determined quickly from the data presented here for the air dose rate versus the spatial extent of radioactive source on the ground.
Sobrevivência de pupas de Lucilia eximia (Wiedemann) (Diptera, Calliphoridae) após submers?o em laboratório
Souza, Alex Sandro Barros de;Keppler, Ruth Leila Ferreira;
Revista Brasileira de Entomologia , 2009, DOI: 10.1590/S0085-56262009000300028
Abstract: between may and june of 2008, the survival of the pupae of lucilia eximia (diptera, calliphoridae) was observed after submersion in laboratory. for this experiment 480 pupae of same age were used, these were divided in eight groups: the group control was not submerged and the other groups were submerged from one to seven days. the increase of the submersion period reduces the survival, with one day of submersion the survival is of 80%, with two days 40%, of 30% with three days, in the fourth day it falls to 23,34% and in the fifth day it is 10%. after this period the mortality rises to 100%. this pattern can be explained by the curve "u-shaped" that happens in the consumption of o2 during the pupal period, where the consumption is larger at the beginning and at the end of the pupal period. the time of submersion also affects the development time, increasing the pupal period. these data are potentially useful in estimating duration of submergence of a corpse in forensic entomology investigations.
Indica??o de cesarianas em óbito fetal
Sampaio, ?nderson Gon?alves;Souza, Alex Sandro Rolland;
Revista Brasileira de Ginecologia e Obstetrícia , 2010, DOI: 10.1590/S0100-72032010000400004
Abstract: purpose: to determine the factors associated with cesarean section in pregnancies with fetal death at a maternity hospital in recife, pernambuco, brazil. methods: a cross-sectional study was performed, which analyzed data from the information system about mortality and medical records, from january 2005 to december 2008, of hospital bar?o de lucena (hbl). we analyzed women with fetal death diagnosis, with gestational age of 20 weeks or more, in terms of sociodemographic characteristics, causes and types of fetal death, obstetrical precedents and birth characteristics. the associations between the variables were analyzed by the χ2 test of association and fisher exact test, with the level of significance set at 5%. we calculated the prevalence ratio as the measure of risk and the confidence interval (ci) at 95%. logistic regression analysis was also performed and the odds ratio (or) was calculated. results: among the 258 pregnant women with fetal death, 27.5% (n=71) underwent cesarean section. after multivariate analysis, the factors that remained significantly associated with cesarean section were maternal age below 20 years (or=0.23; 95%ci=0.06-0.85), history of one or more cesarean sections (or=7.02; 95%ci=2.29-21.55), multiple gestation (or=9.06; 95%ci=2.01-40.71), use of misoprostol for birth induction (or=0.07; 95%ci=0.01-0.32), fetal death occurring during birth (or=4.01; 95%ci=1.13-14.24), low birth weight (or=0.33; 95%ci=0.11-0.94), presence of hypertensive disorders (or=3.7; 95%ci=1.46-9.39) and abruptio placentae (or=13.9; 95%ci=4.67-41.69). conclusion: in hbl, the risk factors for cesarean section in pregnancies with fetal death were previous cesarean section, multiple gestation, intrapartum deaths, hypertensive disorders and abruptio placentae. the protective factors were teenage pregnancy, use of misoprostol and low birth weight.
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