58 resultados para 7798


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We rely on a survey of Swiss firms to document deviation from first-best for reasons of internal 'fairness' when allicating resources. This 'socialist' practice is more widespread in smaller than in larger firms. It ignores the reputation and past performance of the managers who apply for dunding, but takes into account their hierarchical position and their past use of resources. Socialism is only partially explained by concerns about empire building and managerial optimism, and it is not meant to benefit shareholders.

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Changes in the seawater carbonate chemistry (ocean acidification) from increasing atmospheric carbon dioxide (CO2 ) concentrations negatively affect many marine calcifying organisms, but may benefit primary producers under dissolved inorganic carbon (DIC) limitation. To improve predictions of the ecological effects of ocean acidification, the net gains and losses between the processes of photosynthesis and calcification need to be studied jointly on physiological and population levels. We studied productivity, respiration, and abundances of the symbiont-bearing foraminifer species Marginopora vertebralis on natural CO2 seeps in Papua New Guinea and conducted additional studies on production and calcification on the Great Barrier Reef (GBR) using artificially enhanced pCO2 . Net oxygen production increased up to 90% with increasing pCO2 ; temperature, light, and pH together explaining 61% of the variance in production. Production increased with increasing light and increasing pCO2 and declined at higher temperatures. Respiration was also significantly elevated (~25%), whereas calcification was reduced (16-39%) at low pH/high pCO2 compared to present-day conditions. In the field, M. vertebralis was absent at three CO2 seep sites at pHTotal levels below ~7.9 (pCO2 ~700 µatm), but it was found in densities of over 1000 m(-2) at all three control sites. The study showed that endosymbiotic algae in foraminifera benefit from increased DIC availability and may be naturally carbon limited. The observed reduction in calcification may have been caused either by increased energy demands for proton pumping (measured as elevated rates of respiration) or by stronger competition for DIC from the more productive symbionts. The net outcome of these two competing processes is that M. vertebralis cannot maintain populations under pCO2 exceeding 700 µatm, thus are likely to be extinct in the next century.

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Número 259 en el catálogo de Vicente Galbis e Hilari García, bajo el título "Himne a València"

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Contiene T. V.

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We present an application of the Hall-Findlay mammaplasty skin pattern for skin-sparing mastectomy (SSM). This is a simplified vertical reduction mammaplasty. Vertical reduction mammaplasty is the procedure advised for patients with moderator or large ptotic breasts, who wish to have a simultaneous contra-lateral breast reduction/mastopexy at the time of SSM for cancer or prophylactic mastectomy. It is particularly suitable for breast reconstruction with autologous tissue in the form of free transverse rectus abdominis myocutaneous (TRAM), deep inferior epigastric artery perforator (DIEP) and extended latissimus dorsi (ELD) flaps.

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This research investigates the process of “opening out” spaces with sound as an approach to sonic arts practice, investigating the spaces that sounds articulate, reveal and imply in our encounter with them. It positions spatial aesthetics as a key consideration at each stage of the creative process and connects approaches to spatiality in sonic arts practices with contextual considerations drawn from, for example, phenomenological accounts of spatial and sonic experience, human geography, architecture and acoustic ecology. The portfolio consists of seven sonic artworks and two collaborative projects that each engage with these ideas from a different perspective, exploring a number of applications, contexts and outcomes in the investigation. This accompanying commentary discusses these works, providing an introduction to the portfolio followed by a discussion, in the subsequent chapters, of the practices explored and developed in the research process.

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O sistema de uso da terra baseado na implantação de sistemas agro florestais na Amazônia é fortemente recomendado pela pesquisa agropecuária brasileira, no entanto, poderia apresentar algumas restrições no âmbito da sustentabilidade econômica de modo a colocar em risco eminente a população menos favorecida deste território. Para equacionar tal problemática de pesquisa analisamos o processo de emergência e de desenvolvimento de uma experiência agroecológica, localizada no sudeste da Amazônia, mais precisamente em Ouro Preto do Oeste, Rondônia. A investigação teve como objetivo central reconstruir a trajetória de conversão das unidades de produção familiar, de maneira tal que as relações sociais de produção, a diversidade de atividades agropecuárias, as práticas agroambientais, o contexto econômico e social da produção agropecuária, foram identificados e caracterizados, verificando em que medida e momento ocorre ou não, a valorização da relação homem-natureza. A pesquisa foi realizada entre os anos de 2005 e 2007 através de dados secundários, visitas técnicas, a aplicação de questionário e entrevistas aprofundadas junto a 50 famílias de agricultores pertencentes à Associação dos Produtores Alternativos (APA). As famílias são integrantes no programa Proambiente que visa à remuneração de serviços ambientais. Os resultados indicam alta diversidade no uso da terra reafirmando a pluralidade da agricultura familiar na Amazônia. As diferentes formas de exploração da terra revelaram a existência de agricultores adaptados às condições edafoclimáticas locais. A escolha pela implantação de sistemas agroflorestais pelos agricultores é uma alternativa capaz de reduzir a degradação ambiental, êxodo e pobreza rural. Foram identificadas diversas práticas agroecológicas nas propriedades, como: sistema agro florestais, diversificação de espécies, modalidade de implantações distintas, manejo, certificação da produção e organização comunitária visando o equilíbrio homem-natureza.

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Mapa de ubicación de amenazas naturales, con el objetivo de apoyar el proceso de prevención contra desastres naturales en el nivel local.