25,817 research outputs found
Adapting Human Rights
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
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
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
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
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
Time-temperature characteristics of thin skinned models as affected by thermocouple variable
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