Load Lifting
Mostrando 1-12 de 15 artigos, teses e dissertações.
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1. Load Rate Effects in Adhesive Single Lap Joints Bonded with Epoxy/Ceramic Composites
Abstract The present paper is concerned with the analysis of the effect of the loading rate in a particular class of single lap joints used in the oil industry. The adhesive/adherend system consists of ASTM A36 steel plates bonded with an epoxy/ceramic composite. The loading rate sensitivity is analysed considering two different situations: (i) strain contro
Lat. Am. j. solids struct.. Publicado em: 2016-10
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2. Ergonomic evaluation of operations in poultry production systems / Avaliação ergonômica em operações do sistema produtivo de carne de frango
Based on the importance of poultry production for the Brazilian economy and based on current demands of domestic and foreign markets with respect to production and processing of chicken meat, several aspects should be improved in the production chain in order to provide increased product quality with particular attention to safe working conditions for employ
Publicado em: 2009
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3. Desenvolvimento de um macromodelo biomecânico tridimensional da coluna vertebral durante tarefas de levantamento
As atividades desenvolvidas pelo ser humano traduzem-se em grandes esforços internos, sobre as mais variadas estruturas corporais. O conhecimento da magnitude destes esforços pode auxiliar profissionais da área da saúde em atividades como prescrição de exercícios, reabilitação e prevenção de lesões. A magnitude dos esforços internos pode ser obt
Publicado em: 2009
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4. Integração do controle postural e de ações manuais em função da previsibilidade de perturbação e da demanda de precisão espacial / Integration between postural control and manual tasks as a function of predictability of perturbation and spatial precision demand
The aim of this study was to analyze postural control as a function of predictability of a load lifted with the hands, and demand of spatial accuracy in the task. Fifteen males (mean age: 22.8 3.5 years) lifted boxes with variable masses (1, 3 and 5 kg), in conditions of predictable or unpredictable load. The task was performed either under lower spatial acc
Publicado em: 2008
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5. Estudo eletromiográfico dos músculos póstero-mediais do tronco na tarefa de levantamento simétrico de carga do solo / Electromyographic study of posterior medial muscles of the trunk during simmetric load lifting
O presente estudo analisou o comportamento eletromiográfico de vários níveis dos músculos póstero-mediais do tronco, bilateralmente, para verificar a ocorrência de ativação elétrica simétrica e em busca de padrões de comportamento para embasar modelos biomecânicos. A amostra foi composta por 16 indivíduos saudáveis de ambos gêneros. Todas as e
Publicado em: 2008
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6. Um sistema para estimação da vazão de gás de poços produzindo por Plunger Lift para vaso separador de teste em plataformas de petróleo
This work intends to analyze the behavior of the gas flow of plunger lift wells producing to well testing separators in offshore production platforms to aim a technical procedure to estimate the gas flow during the slug production period. The motivation for this work appeared from the expectation of some wells equipped with plunger lift method by PETROBRAS i
Publicado em: 2007
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7. Análise das estratégias de movimento adotadas durante a realização de manuseio de carga.
Despite recent technological advances, occupational activities of manual nature are still essential in many sectors and industries. Such activities impose risky conditions, which are inherent to its nature and can be responsible for musculoskeletal injuries. In addiction, the complexity and the interaction of risk factors, many still not comprehended, that a
Publicado em: 2007
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8. Modelagem paramétrica de pórticos rolantes: estabilidade estrutural e otimização. / Gantry cranes parametric modeling: structural stability and optimization.
The objective of this work is to develop a tool to generate an automatic structural design of gantry cranes. With an automatic generation of finite element models and also a design report, this routine allows a fast verification against yield of material and structural instability. The use of the finite element method was chosen for the structural design bec
Publicado em: 2005
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9. Spectral analysis of the electromyograph of the erector spinae muscle before and after a dynamic manual load-lifting test
The aim of the present study was to assess the spectral behavior of the erector spinae muscle during isometric contractions performed before and after a dynamic manual load-lifting test carried out by the trunk in order to determine the capacity of muscle to perform this task. Nine healthy female students participated in the experiment. Their average age, he
Brazilian Journal of Medical and Biological Research. Publicado em: 2004-07
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10. Methodological aspects to determining the internal loads on the human column. / Aspectos metodológicos para a determinação de cargas internas na coluna vertebral.
Load lifting yields a contact force in the lumbar region (L5-S1) that can sometimes reach the value of the body weight, depending upon the elevated load. Force analyses (muscular, weight, load), the spine being consided as a rigid shank, with extension beimg done only by the erector spine musculature, represent a poor approximation, since the several muscula
Publicado em: 2001
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11. Physical work load and gestational age at delivery.
OBJECTIVE--To assess the impact of physical activity on the gestational age at delivery in women performing physical tasks in their jobs during pregnancy. METHODS--Qualified nurses at 15 weeks of pregnancy were asked through a questionnaire to describe the tasks in their regular job, the physical activities involved, and their exposure to other occupational
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12. Performance of a bimanual load-lifting task by parkinsonian patients.
Normal subjects and Parkinsonian patients performed a bimanual load lifting task. In this task, one "postural" forearm, held in a horizontal position while supporting a 1 kg weight, was unloaded either by the experimenter's hand (imposed unloading) or by the subject's other hand in response to a tone burst (voluntary unloading). The variables recorded were r