124 resultados para Bioplastics,Toy sector,Sustainable materials
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The clothing sector in several countries is still seen, in many aspects as a traditional sector with some average characteristics, nevertheless is a very important sector in terms of labour market. Globalization and de-localization are having a strong impact in the organisation of work and in occupational careers. Very few companies are able to keep a position in the market without changes in organisation of work and workers, founding different ways to face this reality according to size, capital and position. We could find two main paths: one where companies outsource production to another territory, close and/ or dismissal the workers; other path, where companies up skilled their capacities. This paper will present some results from the European project WORKS – Work organisation and restructuring in the knowledge society (6th Framework Programme), focusing the Portuguese case studies in several clothing companies in a comparative analysis with some other European countrie
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The aim of this paper is to characterize complaints in the upper limbs, shoulders, neck and back- lumbar region directly related to musculo-skeletal disorders in a sampling of 114 cleaners from seven cleaning (janitor) companies, operating at eight client organizations. Complaints had been diagnosed as stiffness, any pain, numbness, paraesthesiae, tingling, cold feeling and blanching of at least one finger tip, according to a temporal criteria of symptoms were present now or have been present on at least 4 days during the last 7 days, or symptoms have been present on at least 4 days during at least one week in the last 12 months. It was analyzed the severity of the complaints (interference with current activities) and the simultaneous occurrence of multiple symptoms. The causes of medical consultation in the last year were analyzed (osteo-articular pathology of the vertebral spine, of the upper and lower limbs, depressive syndromes and other complaints of the lower limbs among others). In the end, the relation between persistent complaints and musculo- skeletal pathology related to work activities was analyzed, considering particularly the age of the workers and the existence of osteo-articular pathology.
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The aim of this contribution is to extend the techniques of composite materials design to non-linear material behaviour and apply it for design of new materials for passive vibration control. As a first step a computational tool allowing determination of macroscopic optimized one-dimensional isolator behaviour was developed. Voigt, Maxwell, standard and more complex material models can be implemented. Objective function considers minimization of the initial reaction and/or displacement peak as well as minimization of the steady-state amplitude of reaction and/or displacement. The complex stiffness approach is used to formulate the governing equations in an efficient way. Material stiffness parameters are assumed as non-linear functions of the displacement. The numerical solution is performed in the complex space. The steady-state solution in the complex space is obtained by an iterative process based on the shooting method which imposes the conditions of periodicity with respect to the known value of the period. Extension of the shooting method to the complex space is presented and verified. Non-linear behaviour of material parameters is then optimized by generic probabilistic meta-algorithm, simulated annealing. Dependence of the global optimum on several combinations of leading parameters of the simulated annealing procedure, like neighbourhood definition and annealing schedule, is also studied and analyzed. Procedure is programmed in MATLAB environment.
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Dissertação apresentada na Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa para a obtenção do grau de Mestre em Conservação e Restauro, especialização em pintura sobre tela
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Dissertação para obtenção do Grau de Doutor em Química Sustentável
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Dissertação para obtenção do Grau de Mestre em Engenharia do Ambiente
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Baseado no relatório avaliado na disciplina de Economia e Gestão da Inovação (Prof. Maria Luísa Lopes), no programa doutoral de Avaliação de Tecnologia, na Faculdade de Ciências e Tecnologia - Universidade Nova de Lisboa em Janeiro de 2011
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Dissertação para obtenção do Grau de Mestre em Engenharia do Ambiente, perfil de Gestão e Sistemas Ambientais
O Impacto Económico da II Guerra Mundial no Sector Vitivinícola Português - O caso dos Vinhos Comuns
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Dissertação apresentada para cumprimento dos requisitos necessários à obtenção do grau de Mestre em História Contemporânea
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Dissertação para obtenção do Grau de Mestre em Engenharia e Gestão Industrial
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Dissertation to obtain the Master degree in Electrical Engineering and Computer Science
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A presente exposição tem como tema, a Troca Electrónica de Dados (Electronic Data Interchange – EDI) transferência de dados em mensagens normalizadas estabelecidas computador a computador por meios electrónicos. O objectivo proposto é o estudo de um caso real de implementação da tecnologia EDI num sector específico do mercado português – sector farmacêutico – onde se dá total atenção às várias etapas do projecto da cooperativa distribuidora Codifar.
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Dissertação para obtenção do Grau de Mestre em Engenharia Química e Bioquímica
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Dissertação para obtenção do Grau de Mestre em Engenharia e Gestão Industrial
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The objective of the paper is to help to understand recent changes in the structure of R&D activities, by analyzing data on the expenditure of the business sector in research and development (R&D). The results are framed in an international context, through comparison with indicators from the most developed countries, divided by technological intensity and economic activity. The study reveals that the indicators of Portuguese R&D expenditure in the business sector are closely linked both to fiscal policy and to high foreign direct investment in knowledge-intensive industries. It also links these indicators to phenomena such as the abundance of skilled labor in pharmaceutical industries and the government intervention in some sectors of the economy (namely health and rail transportation).