Welfare Implications of Washington Wheat Breeding Programs

We calculate the welfare effects of the WSU wheat breeding programs for producers and consumers in Washington State, Oregon, Idaho, the United States and the rest of the world. We develop a partial equilibrium multi-region, multi-product, multi-variety trade model for wheat that provides consumer, producer and total surplus for each wheat class and region. Our results provide evidence suggesting that WSU wheat breeding programs have increased welfare in Washington State, in the United States and the rest of the world.welfare, wheat breeding programs, economic surplus, partial equilibrium, Agribusiness, F14, F17, Q11, Q16, Q18,

Transition amplitude, partition function and the role of physical degrees of freedom in gauge theories

This work explores the quantum dynamics of the interaction between scalar (matter) and vectorial (intermediate) particles and studies their thermodynamic equilibrium in the grand-canonical ensemble. The aim of the article is to clarify the connection between the physical degrees of freedom of a theory in both the quantization process and the description of the thermodynamic equilibrium, in which we see an intimate connection between physical degrees of freedom, Gibbs free energy and the equipartition theorem. We have split the work into two sections. First, we analyze the quantum interaction in the context of the generalized scalar Duffin-Kemmer-Petiau quantum electrodynamics (GSDKP) by using the functional formalism. We build the Hamiltonian structure following the Dirac methodology, apply the Faddeev-Senjanovic procedure to obtain the transition amplitude in the generalized Coulomb gauge and, finally, use the Faddeev-Popov-DeWitt method to write the amplitude in covariant form in the no-mixing gauge. Subsequently, we exclusively use the Matsubara-Fradkin (MF) formalism in order to describe fields in thermodynamical equilibrium. The corresponding equations in thermodynamic equilibrium for the scalar, vectorial and ghost sectors are explicitly constructed from which the extraction of the partition function is straightforward. It is in the construction of the vectorial sector that the emergence and importance of the ghost fields are revealed: they eliminate the extra non-physical degrees of freedom of the vectorial sector thus maintaining the physical degrees of freedom

Distribuicao radicular de caupi em solo arenoso sob diferentes laminas de agua e dose de adubacao fosfatada.

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Maximally Localized States in Quantum Mechanics with a Modified Commutation Relation to All Orders

We construct the states of maximal localization taking into account a modification of the commutation relation between position and momentum operators to all orders of the minimum length parameter. To first order, the algebra we use reproduces the one proposed by Kempft, Mangano and Mann. It is emphasized that a minimal length acts as a natural regulator for the theory, thus eliminating the otherwise ever appearing infinities. So, we use our results to calculate the first correction to the Casimir Effect due to the minimal length. We also discuss some of the physical consequences of the existence of a minimal length, culminating in a proposal to reformulate the very concept of "position measurement"

Comportamento de açaizeiros em solos inundáveis de igapó no estado do Pará.

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Estrutura e dinâmica populacional de açaizais nativos de várzea na região do Baixo Tocantins, Estado do Pará.

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CNC 0434: nova cultivar de feijão caupi para o Amapá.

Esta cultivar foi introduzida no Amapá pela Embrapa através da Unidade de Execução de Pesquisa de Ambito Territorial de Macapá (UEPAT de Macapá) no ano de 1982, sendo avaliada durante 3 anos nos municipios de Macapá e Mazagão. Esta cultivar, pelo fato de possuir graos com tegumento de coloração branca e apresentar rendimentos medios de 1.000 kg/ha, superiores em ate 40% aos das tradicionalmente plantadas no Territorio, e recomendada para utilização em escala comercial pelos agricultores amapaenses.bitstream/item/64922/1/AP-1985-cnc-nova-cultivar-feijao-caupi.pd