1,358 research outputs found

    Free boundary on a cone

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    We study two phase problems posed over a two dimensional cone generated by a smooth curve γ\gamma on the unit sphere. We show that when length(γ)<2πlength(\gamma)<2\pi the free boundary avoids the vertex of the cone. When length(γ)2πlength(\gamma) \geq 2\pi we provide examples of minimizers such that the vertex belongs to the free boundary

    Localized states in the conserved Swift-Hohenberg equation with cubic nonlinearity

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    The conserved Swift-Hohenberg equation with cubic nonlinearity provides the simplest microscopic description of the thermodynamic transition from a fluid state to a crystalline state. The resulting phase field crystal model describes a variety of spatially localized structures, in addition to different spatially extended periodic structures. The location of these structures in the temperature versus mean order parameter plane is determined using a combination of numerical continuation in one dimension and direct numerical simulation in two and three dimensions. Localized states are found in the region of thermodynamic coexistence between the homogeneous and structured phases, and may lie outside of the binodal for these states. The results are related to the phenomenon of slanted snaking but take the form of standard homoclinic snaking when the mean order parameter is plotted as a function of the chemical potential, and are expected to carry over to related models with a conserved order parameter.Comment: 40 pages, 13 figure

    Does Social Capital Have a Role in Environmental Kuznets Curve? Spatial Panel Regression Approach

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    We advance a case for an inclusion of social capital in the environmental Kuznets curve analysis using highly disaggregated data on water pollution in Louisiana. A social capital index and other variables are used in parametric and spatial panel regression models to explain water pollution dynamics.social capital, principal component analysis, environmental Kuznets curve, spatial regression, Environmental Economics and Policy,

    Strategic environmental assessment: assessing the environmental impact of biotechnology

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    Poverty reduction, Agricultural research, Environmental protection, Genetically modified organisms, Crops, Agricultural biotechnology Research, Investments, Strategic Environmental Assessment,

    Analysis for biotechnology innovations using Strategic Environmental Assessment (SEA):

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    " Meeting the food needs of the world's growing population while reducing poverty and protecting the environment is a major global challenge. Genetically modified crops appear to provide a promising option to deal with this challenge. However there is a need to make strategic decisions on how to spend limited agricultural research funds in order to achieve a maximum impact with regard to finding sustainable solutions to end hunger and poverty. In international development institutions, there is growing interest in the potential use of Strategic Environmental Assessment (SEA) as part of a research based Environmental Management System (EMS) to promote mainstreaming of environmental considerations in policy development. SEA was developed as an approach to integrate environmental considerations at a policy level, where alternatives environmental policies can be evaluated. In this paper, we propose using SEA in a policy research and priority setting process regarding new technologies, taking the development of Genetically Modified Organisms (GMOs) as an example. We propose that this method would be a useful tool for the international agricultural research centers of the Consultative Group for International Agricultural Research (CGIAR), streamlining business processes, strengthening accountability, sharpening the research agenda it supports, fostering broader partnerships, and increasing the relevance and impact of CGIAR research in achieving international development goals. Currently international law requires only Environmental Impact Assessments (EIAs) of specific biotechnology projects. The incorporation of environmental considerations only at the level of specific projects precludes the adoption of alternative environmental policies. In this review, we outline an SEA approach currently being considered at the International Food Policy Research Institute (IFPRI) for use in evaluating biotechnology policies. SEA may be a useful tool to inform the evaluation of biotechnology policies and priorities by taking account of information on the economic, social, and environmental benefits, cost and risks of adopting those policies." Authors' AbstractRisk, Strategic Environmental Assessment, Genetically modified organisms, Living modified organisms,

    Retiring from Intercollegiate Athletics: A Phenomenological Investigation

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    The major objective of this research was to explore the experience of retiring from sport following a career in college athletics. The phenomenological method was used to interview five retired athletes and gather data, A clearer understanding of the experience of the participant is established by the unstructured interview style inherent within the phenomenological method, allowing the participant to control the interview and be the expert of his or her own experience. Following these interviews, a research group analyzed the transcripts looking for themes that existed for all five participants. Four main themes with subthemes emerged from this analysis, including Identity, with the sub-themes of Void, Emotion, and Life Shift/Redirection; The Game, with the subthemes of Stories of Past History, Difference between Levels of Sport, Contentment in Reminiscing, and Retirement as a Process; Body, with the sub­themes of Fitness/Being in Shape, Injury, and Speed; and Others, with the sub­themes of The Team (Coaches/Teammates) and The Community (Family/Friends). It is the hope of the author that this research will provide a clearer understanding of the experience of retiring from sport so that coaches, parents, counselors, and the athletes themselves can take steps toward having a successful and constructive retirement
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