36 research outputs found

    Nanocomposites: synthesis, structure, properties and new application opportunities

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    A Texel fishing lineage: the social dynamic and economic logic of family firms

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    In the 1970s and early 1980s, several maritime anthropologists and sociologists pointed out that for a number of economic, social and psychological reasons, the performance of commercial fishing firms based on kin-based capital and labour was highly adaptive. For this reason, most crews in the North Atlantic area seemed to be organized around a core of agnatic relatives with women playing important shore-based roles. As of the early 1990s, the attention of anthropologists and sociologists shifted away from ‘classical’ themes such as the social organization of fishing to issues of policy and management, particularly property rights regimes and rights-based fishing. Consequently, the topic of kin and family in the fisheries disappeared into the background. Nonetheless, it would appear that family firms are still predominant in the fisheries. In this paper, I will analyze their logic and dynamic in conditions of ecological, economic and political uncertainty, using ethnographic material from research in Dutch fishing communities on the island of Texel. Considerable attention will be devoted to the issue of what rights-based management regimes have meant for the social organization of and kin involvement in fishing firms

    Workplace Creativity, Innovation, and Age

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    Creativity is the generation of ideas that are both novel and appropriate. Innovation is the subsequent intentional implementation of those ideas.While work performance is a complex and multifaceted construct (Viswevaran 2001), one of the most coveted and elusive dimensions of work performance is creative and innovative performance. Organizations look for ways to stimulate (or at least not hinder) their employees’ creative and innovative performance, because this will – it is believed – contribute to individual, team, and organizational success (Gilson 2008). Since the workforce is aging and will continue to do so over the next decades, organizations need to know what ramifications – if any – this demographic change will have for their innovative potential. The goal of this entry, therefore, is to examine relationships between employee age and workplace creativity and innovation

    The worldwide leaf economics spectrum

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    Bringing together leaf trait data spanning 2,548 species and 175 sites we describe, for the first time at global scale, a universal spectrum of leaf economics consisting of key chemical, structural and physiological properties. The spectrum runs from quick to slow return on investments of nutrients and dry mass in leaves, and operates largely independently of growth form, plant functional type or biome. Categories along the spectrum would, in general, describe leaf economic variation at the global scale better than plant functional types, because functional types overlap substantially in their leaf traits. Overall, modulation of leaf traits and trait relationships by climate is surprisingly modest, although some striking and significant patterns can be seen. Reliable quantification of the leaf economics spectrum and its interaction with climate will prove valuable for modelling nutrient fluxes and vegetation boundaries under changing land-use and climate

    Aerodynamic and Electrostatic Properties of Model Dry Powder Aerosols: a Comprehensive Study of Formulation Factors

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    The impact of formulation variables on aerodynamic and electrostatic properties of dry powder aerosol particles is of great importance to the development of efficient and reproducible inhaler products. Systematic evaluation requires a well-designed series of experiments using appropriate methods. A factorial experimental design was employed. In broad terms, the conditions considered were two drugs, albuterol and budesonide, in combination with different excipients, drug concentrations, delivered doses, and metering system (capsule composition) and sampled under different flow conditions using standard entrainment tubes. Samples were collected in an electrical low-pressure impactor, to evaluate distribution of electrostatic properties, and an Andersen eight-stage nonviable cascade impactor, to estimate aerodynamic particle size distribution, concurrently. The deposition studies allowed calculation of approximate per particle charge levels for drug. The results showed very high particle charge levels, often in the 1,000–10,000 of elementary charges per particle range, orders of magnitude higher than charge levels predicted by the Boltzmann charge distribution. The charge levels are considerably higher than had previously been estimated (200e per particle)
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