ANNUAL ESTIMATES OF LATIN AMERICAN DISTORTIONS TO AGRICULTURAL INCENTIVES

Distorted incentives, agricultural and trade policy reforms, national agricultural development, Agricultural and Food Policy, International Relations/Trade, F13, F14, Q17, Q18,

ANNUAL ESTIMATES OF ASIAN DISTORTIONS TO AGRICULTURAL INCENTIVES

Distorted incentives, agricultural and trade policy reforms, national agricultural development, Agricultural and Food Policy, International Relations/Trade, F13, F14, Q17, Q18,

ANNUAL ESTIMATES OF DISTORTIONS TO AGRICULTURAL INCENTIVES IN EUROPE’S TRANSITION ECONOMIES

Distorted incentives, agricultural and trade policy reforms, national agricultural development, Agricultural and Food Policy, International Relations/Trade, F13, F14, Q17, Q18,

ANNUAL ESTIMATES OF AFRICAN DISTORTIONS TO AGRICULTURAL INCENTIVES

Distorted incentives, agricultural and trade policy reforms, national agricultural development, Agricultural and Food Policy, International Relations/Trade, F13, F14, Q17, Q18,

Absence of weak antilocalization in ferromagnetic films

We present magnetoresistance measurements performed on ultrathin films of amorphous Ni and Fe. In these films the Curie temperature drops to zero at small thickness, making it possible to study the effect of ferromagnetism on localization. We find that non-ferromagnetic films are characterized by positive magnetoresistance. This is interpreted as resulting from weak antilocalization due to strong Bychkov-Rashba spin orbit scattering. As the films become ferromagnetic the magnetoresistance changes sign and becomes negative. We analyze our data to identify the individual contributions of weak localization, weak antilocalization and anisotropic magnetoresistance and conclude that the magnetic order suppresses the influence of spin-orbit effects on localization phenomena in agreement with theoretical predictions.Comment: 6 pages, 6 figure

Annual Estimates of Distortions to Agricultural Incentives in Europe's Transition Economies

Ernesto Valenzuela, Marianne Kurzweil, Johanna Croser, Signe Nelgen and Kym Anderso

Adapting approximate memory potentials for time-dependent density functional theory

Frequency dependent exchange correlation kernels for time-dependent density functional theory can be used to construct approximate exchange-correlation potentials. The resulting potentials are usually not translationally covariant nor do they obey the so-called zero-force condition. These two basic symme-try requirements are essential for using the potentials in actual applications (even within the linear re-sponse regime). We provide two pragmatic methods for imposing these conditions. As an example we take the Gross and Kohn (GK) frequency dependent XC functional (Phys. Rev.Lett. 55, 2850 (1985)), correct it, and numerically test it on a sodium metal cluster. Violation of the basic symme-tries causes instabilities or spurious low frequency modes

Annual Estimates of African Distortions to Agricultural Incentives

Ernesto Valenzuela, Marianne Kurzweil, Johanna Croser, Signe Nelgen and Kym Anderso

Annual Estimates of Asian Distortions to Agricultural Incentives

Ernesto Valenzuela, Marianne Kurzweil, Johanna Croser, Signe Nelgen and Kym Anderso

Annual Estimates of Latin American Distortions to Agricultural Incentives

Ernesto Valenzuela, Marianne Kurzweil, Esteban Jara, Johanna Croser and Kym Anderso