2,405 research outputs found
ECONOMIC VALUATION OF THE Eucalyptus urograndis PRODUCTION IN TWO TYPES OF CONTAINERS
The systematic treatment of uncertainties associated with forest production processes allows the establishment of technical and managerial strategies to mitigate the risk inherent in the application of capital demanded in the production of cuttings. Therefore, the aim of this research was to ascertain the unit risk to produce Eucalyptus cuttings using the Monte Carlo simulation method. Based on the estimate of the production cost of Eucalyptus cuttings and in the expected revenues of six productive systems, characterized as forestry investment projects, it was possible to construct cash flows followed by the metrics used for the decision of mutually exclusive investment projects. The incorporation of risk analysis had as propositions the uncertainties associated with the productive factors, in which probability distributions were attributed. Then, pseudorandom numbers were generated by the Monte Carlo simulation method, with the purpose of measuring the stochastic economic values and the probabilities of occurrences for the project metrics. The stochastic results showed that the probability of economic viability for the analyzed conditions is null. The most critical stochastic variables of forestry projects are investments and the cycle production of cuttings.
Foraging Activity of Xylocopa cearensis (Ducke) in Sand Dune Landscape
Bees foraging strategy is affected by the distribution and abundance of flower resources, mainly nectar and pollen. Homing-time of female Xylocopa cearensis (Ducke) bees to their nests was assessed through a simple translocation method. The hypothesis addressed was that resource distribution in the landscape level influences bee homing time. The study area comprises about 300ha in a sand dune field with patchy shrubs in Salvador, Bahia, Brazil. The mean homing time after translocation was 60 min (sd = 4.36 min; n= 03), except for one bee that did not returned. The translocation technique was successfully applied to large solitary bees, since they do return to their own nest and can be easily recognized when arriving. Also, bees returned carrying pollen, what suggests foraging activity after translocations. Results evidence landscape functional connectivity since bees were able to move through local habitats. Further studies should address movement cost tradeoffs and its consequences on bee diversity conservation
Determining factors of domestic accidents in early childhood
Introduction: Domestic accidents are one of the main causes of death among children, characterized by an event that involves multiple determinants, emphasizing, among others, intrapersonal, interpersonal, cultural and institutional factors. Objective: To analyse the determinants of domestic accidents in early childhood. Methods: This is an exploratory, descriptive, and cross-sectional study carried out in the Emergency Hospital of Teresina city, Piauí, Brazil, between January and March 2016. The population was composed of 21 caregivers of children under five years old, hospitalized between January and March 2016. For data collection, a structured interview was conducted on aspects related to the risk factors associated with the incidence of domestic accidents involving children. A descriptive analysis was performed, with absolute and relative frequencies for the variables. The Human Research Ethics Committee approved the research with Protocol No. 1324184. Results: In relation to intrapersonal factors, pre-school children were the main victims (57.2%). For interpersonal factors, it was observed that most of participants (85.7%) considered the household unsafe for children. The evaluation of institutional factors showed that most caregivers (52.4%) had not been advised about the prevention of accidents at home. In terms of cultural factors, most participants (81%) had not heard news about domestic accidents. Conclusion: Parents and caregivers have very limited knowledge about the prevention of childhood accidents at home, with male pre-schoolers the main victims of domestic accidents
Avaliação da disciplina Estágio Supervisionado em Ensino de Química III pelos discentes no curso de licenciatura em Química da Universidade Federal de Sergipe – campus Professor Aberto Carvalho
ESTE TRABALHO TEM POR OBJETIVO APRESENTAR DADOS OBTIDOS POR MEIO DE UMA AVALIAÇÃO FINAL– QUESTIONÁRIOS COM DEZ QUESTÕES, APLICADO A TURMA DE ESTÁGIO SUPERVISIONADO EM ENSINO DE QUÍMICA III EM 2011 DA UNIVERSIDADE FEDERAL DE SERGIPE/CAMPUS PROFESSOR ALBERTO CARVALH
MONITORIA DA DISCIPLINA ZOOLOGIA II - 99
A monitoria é um serviço de apoio pedagógico oferecido aos alunos interessados em aprofundar conteúdos, bem como solucionar dificuldades em relação à matéria trabalhada em aula e contribui para a formação integrada do aluno nas atividades de ensino, pesquisa e extensão dos cursos de graduação. Com essas ações a monitoria tem como objetivo ajudar os alunos com o ensino da matéria de zoologia. Para o ensino da matéria Zoologia II foram realizadas cinco ações: Aulas práticas onde o monitor auxiliava os alunos a identificar as estruturas dos animais estudados; Correção dos relatórios de aulas práticas; auxiliar os alunos a montar suas caixas entomológicas; Arrumação da coleção em meio liquido e Arrumação das caixas entomológicas pertencentes a coleção do curso de biologia. De modo geral a monitoria mostrou um resultado satisfatório visto que a taxas de reprovação e desistência foram baixa
TEORIA DA BASE DE EXPORTAÇÃO: UMA AVALIAÇÃO DA BASE DE EXPORTAÇÃO DA REGIÃO SUL DO BRASIL
A teoria da base de exportação desenvolvida a priori por North (1955) destaca as exportações como fator primordial para o crescimento de uma determinada região, tendo em vista o efeito multiplicador exercido pelas exportações sobre as atividades locais, ou seja, orientadas a demanda interna. Diante disto, o presente trabalho tem por objetivo traçar o perfil da base de exportação da região Sul do Brasil, assim como, verificar a sua validade, por meio do método econométrico dos mínimos quadrados ordinários (MQO), tendo como variável o emprego formal nas atividades produtivas da região Sul nos anos 2002, 2006 e 2010. Com a finalidade de classificar as atividades entre básicas e não-básicas aplicou-se o critério do quociente locacional. O coeficiente de localização apontou uma concentração das atividades básicas no setor da indústria de transformação nos três anos em estudos, havendo uma alteração significativa na participação do setor de serviços entre os anos de 2002 e 2006 e estagnando sua participação em 2010. Com respeito ao modelo econométrico empregado, evidenciou-se uma relação positiva entre as atividades básicas e não-básicas para a região Sul nos três anos em estudo, corroborando com teoria da base de exportação
Influence of neuromuscular fatigue on co-contraction between vastus medialis and vastus lateralis during isometric contractions
The aim of this study was to evaluate the effect of neuromuscular fatigue on vastus medialis and vastus lateralis co-contraction. Fifteen healthy young subjects performed an isometric leg extension test in two
different condition phases: i) maximum test for determining the maximum voluntary isometric contraction, and ii) fatigue test for exercises executed at 50% of the maximum voluntary contraction in three distinct periods with seven-day intervals between the tests. To quantify the co-contraction between the vastus medialis and vastus lateralis muscles, the signals overlapped and the intersection area was calculated. The data reliability was verified with the intraclass correlation coefficient (ICC) and standard error measurement
(SEM). Values of median frequency and root mean square for both muscles showed a significant difference between the beginning and the end of the test, which indicates occurrence of the neuromuscular fatigue. The median frequency and root mean square ICC values ranged from moderate (ICC .66) to high (ICC .74) reliability with low SEM both for vastus medialis and vastus lateralis. The co-contraction values in the beginning of the test varied from 0.76 to 0.77, with a moderate reliability (ICC .63) and with low SEM. In the neuromuscular fatigue condition, ICC values of co-contraction varied from .75 to .76, with low reliability (.14) and with low SEM. Therefore, there were no significant differences between the co-contraction behavior at the beginning and the end of the fatigue tests. Based on these results, it is understood that the neuromuscular fatigue does not alter muscle co-contraction between vastus medialis and vastus lateralis in maximum
voluntary contraction tests
Eficiência de Amplificação do DNA Isolado de Sangue Bovino
Resumo: a extração de DNA proporciona uma comunhão de técnicas e experiências, sendo assim, enriquecendo a pecuária nacional. O estudo genético é uma variável importante para o sucesso da atividade rural relacionada ao melhoramento do rebanho. O objetivo do presente estudo foi avaliar a qualidade de DNA bovino isolado de sangue periférico mediante amplificação de DNA genômico por PCR.
Palavras-chave: Extração. DNA. Pecuária. Melhoramento. Bovino. PCR
Eficiência de Amplificação do DNA Isolado no Sangue Bovino
Resumo: a extração de DNA oferece uma união de técnicas
e experiências, enriquecendo assim o gado nacional.
Testes genéticos são variáveis importantes para o sucesso
das atividades rurais relacionadas com a melhoria do rebanho.
O objetivo deste estudo foi avaliar a qualidade do
DNA bovino isolado do sangue periférico por amplificação
do DNA genômico por PCR.
Palavras-chave: Extração. Bovinos. Amplificação.
PCR
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