Encontrados 13 documentos, a visualizar página 1 de 2
Recycling of textile wastes in fibre-cement composites
Monteiro, H.; Caldeira, F.; Pinto, J.; Varum, H.Changing wastes into raw materials is one of the most favoured options for waste management, as it diverts wastes from landfill and saves resources. Fibres, either vegetable (cellulosic) or synthetic, may be added to cement pastes in order improve the properties of concrete or mortar by reinforcement. At the same time, if our source of fibres is wastes, then such processes make ways for recycling. In this work ...
Multinational telecommunications operators : impact of market factors and forei...
Oliveira, Maria da Conceição T. F. Monteiro H.Mestrado em Finanças ; Firms are exposed to foreign exchange risk when the results of their projects depend on future exchange rates and those exchange rates can not be fully anticipated. Through the last 50 years, exchange risk management has received increasing attention in both corporate practice and literature. Firms are also exposed to other market factors, domestic and internationally, with a major impac...
Pricing for scarcity
Roseta-Palma, C.; Monteiro, H.DINÂMIA, Junho de 2008. ; “Prémio Científico ISCTE-IUL 2012” ; In many areas where water is not abundant, water pricing schedules contain significant nonlinearities. Existing pricing literature establishes that efficient schedules will depend on demand and supply characteristics. However, most empirical studies show that actual pricing schemes have little to do with theoretical efficiency results. In particul...
Recuperação de custos no sector de abastecimento de água e de drenagem e tratam...
Monteiro, H.Neste artigo investiga-se em que medida as receitas no sector de abastecimento de água e drenagem e tratamento de águas residuais em Portugal continental cobrem os custos de exploração e de investimento. Os resultados são analisados por tipos de sistema (em baixa e em alta), por NUTS III e por tipo de entidade gestora. Enquanto que nos sistemas de abastecimento de água existem níveis de recuperação de custos qu...
Caracterização dos tarifários de abastecimento de água e saneamento em Portugal
Monteiro, H.; Roseta-Palma, C.Código JEL: Q25 ; Os tarifários aplicados pelas entidades gestoras no sector da água em Portugal apresentam globalmente uma enorme complexidade, o que não só dificulta a sua análise como ensombra o objectivo da eficiência, que é reconhecido como uma peça importante na gestão da água pela legislação nacional e europeia. Neste trabalho são apresentados os principais critérios que podem ser levados em consideraçã...
A comparison of the undergraduate economics major in Europe and in the United S...
Monteiro, H.; Lopes, A. F.JEL Code: A12, A22 ; In this work we compare the undergraduate Economics majors and their underlying structure in the top-ranked Economics departments of Europe and the United States. We identify the fundamental courses usually included in an Economics major by means of a cluster analysis. We further distinguish between those courses which are required and those which are usually offered as electives. We find ...
Water pricing models: a survey
Monteiro, H.JEL Classification: L95, Q25. ; This paper surveys water pricing models, highlighting some important results. Efficiency requires marginal cost pricing. Intra-annual price changes or customer differentiation to reflect differences in marginal costs can enhance efficiency. A marginal cost pricing mechanism may signal the value that consumers attribute to further capacity expansions as the water supply system ap...
A flexibilidade das estruturas curriculares portuguesas enquanto implicação do ...
Monteiro, H.; Lopes, A. F.Classificação JEL: A12; A22. ; Neste artigo fizemos uma análise comparativa da estrutura curricular dos cursos de graduação em Economia entre Portugal e as melhores instituições europeias, para o ano lectivo 2004-05. A análise aponta para uma menor flexibilidade das licenciaturas portuguesas actuais face à realidade europeia de referência, exigindo-se a frequência de uma proporção maior de disciplinas obrigató...
Thalidomide and pentoxifylline block the renal effects of supernatants of macro...
Martins,A.M.C.; Nobre,A.C.L.; Almeida,A.C.; Bezerra,G.; Lima,A.A.M.; Fonteles,M.C.; Monteiro,H.S.A.Because thalidomide and pentoxifylline inhibit the synthesis and release of tumor necrosis factor-alpha (TNF-alpha), we determined the effect of these drugs on the renal damage induced by supernatants of macrophages activated with Crotalus durissus cascavella venom in order to identify the role of TNF-alpha in the process. Rat peritoneal macrophages were collected with RPMI medium and stimulated in vitro with C...
Effects of lipopolysaccharide on low- and high-density cultured rabbit vascular...
Barbosa de Oliveira,L.C.; Rocha Oliveira,C.J.; Fries,D.M.; Stern,A.; Monteiro,H.P.Previous studies have shown that exogenously generated nitric oxide (NO) inhibits smooth muscle cell proliferation. In the present study, we stimulated rabbit vascular smooth muscle cells (RVSMC) with E. coli lipopolysaccharide (LPS), a known inducer of NO synthase transcription, and established a connection between endogenous NO, phosphorylation/dephosphorylation-mediated signaling pathways, and DNA synthesis....
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