25,817 research outputs found

    Adapting Human Rights

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    Governmental leaders, scholars, and activists have advocated for human rights to food, water, education, health care, and energy. Such rights, also called positive rights, place an affirmative duty upon the state to provide a minimum quantity and quality of these goods and services to all citizens. But food, education, water, and health care are so different–in how they are produced, consumed, and financed–that the implementation of a positive right must be adapted to the distinctive characteristics of the good or service it guarantees. The primary aims of this adaptive implementation are transparency, enforceability and sustainability in the provision of positive rights. Only by adapting a positive right to its policy environment can such a right function as a viable means of protecting disadvantaged members of society. This article uses the example of positive rights to public utilities, such as water and energy, to illustrate adaptive implementation of positive rights. In doing so, this article explains why and how a positive right must be adapted to the unique policy environment of a given public utility

    Kolmogorov-Burgers Model for Star Forming Turbulence

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    The process of star formation in interstellar molecular clouds is believed to be controlled by driven supersonic magnetohydrodynamic turbulence. We suggest that in the inertial range such turbulence obeys the Kolmogorov law, while in the dissipative range it behaves as Burgers turbulence developing shock singularities. On the base of the She-Leveque analytical model we then predict the velocity power spectrum in the inertial range to be E_k ~ k^{-1.74}. This result reproduces the observational Larson law, ~ l^{0.74...0.76}, [Larson, MNRAS 194 (1981) 809] and agrees well with recent numerical findings by Padoan and Nordlund [astro-ph/0011465]. The application of the model to more general dissipative structures, with higher fractal dimensionality, leads to better agreement with recent observational results.Comment: revised, new material added, 8 page

    Scaling relations of supersonic turbulence in star-forming molecular clouds

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    We present a direct numerical and analytical study of driven supersonic MHD turbulence that is believed to govern the dynamics of star-forming molecular clouds. We describe statistical properties of the turbulence by measuring the velocity difference structure functions up to the fifth order. In particular, the velocity power spectrum in the inertial range is found to be close to E(k) \~ k^{-1.74}, and the velocity difference scales as ~ L^{0.42}. The results agree well with the Kolmogorov--Burgers analytical model suggested for supersonic turbulence in [astro-ph/0108300]. We then generalize the model to more realistic, fractal structure of molecular clouds, and show that depending on the fractal dimension of a given molecular cloud, the theoretical value for the velocity spectrum spans the interval [-1.74 ... -1.89], while the corresponding window for the velocity difference scaling exponent is [0.42 ... 0.78].Comment: 17 pages, 6 figures include

    KEY DEVELOPMENTS IN THE FOOD DISTRIBUTION SYSTEM

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    Many changes are occurring in food retailing. Forces driving these changes include the sales gains by supercenter, membership club, and convenience stores, the growing popularity of foodservice, the expansion of private label products (and the response by branded food manufacturers), and the identification of new consumer interests and concerns. These forces encouraged food processors, distributors, and retailers to improve the efficiency of the food distribution system. The Efficient Consumer Response and Efficient Foodservice Response initiatives are designed to lower the costs to move products through the system. These developments in the food distribution system have several important implications for other food and agricultural businesses.Supercenter, Membership Club, New Products, Private Label, Supermarket, Retailing, Efficient Consumer Response, Efficient Foodservice Response, Food Spending, Agricultural and Food Policy, Food Consumption/Nutrition/Food Safety, Industrial Organization, Marketing,

    CHANGING EMPHASIS IN AGRIBUSINESS CURRICULA

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    Required courses for agribusiness degrees at forty-three schools were divided into six categories. The ranges in the percentage of required credits by category were quite large. Industry leaders, alumni, and employers have suggested increasing the course work on communications and business skills to improve the curricula. However, a comparison of degree requirements over time for a sample of twelve programs did not reveal major increases in emphasis for these areas. Departments should consider customer needs and competing programs as they review their curricula and attempt to add more value to their educational products.Teaching/Communication/Extension/Profession,

    Time-temperature characteristics of thin- skinned models as affected by thermocouple variables Semiannual report

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    Time-temperature characteristics of thin skinned models as affected by thermocouple variable
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