A 300 GHz "Always-in-Focus" Focusing System for Target Detection

A focusing system for a 300 GHz radar with 5 m target distance and 10 mm diameter spot size resolution is proposed. The focusing system is based on a Gaussian telescope scheme and its main parameters have been de¬signed using Gaussian beam quasi-optical propagation theory with an in-house developed MATLAB® based analysis tool. Then, this approach has been applied to a real focusing system based on two elliptical mirrors in order to reduce the distortion and cross-polar level and a plane mirror to provide scanning capabilities. The over¬all system has been simulated with a full-wave electromag¬netic simulator and its behavior is presented. With this approach, the focusing system always works "in-focus" since the only mirror that is rotated when scanning is the output plane mirror, so the beam is almost not distorted. The design process, although based in the well-known Gaussian beam quasi-optical propagation theory, provides a fast and accurate method and minimizes the overall size of the mirrors. As a consequence, the size of the focusing system is also reduced

Habilidade competitiva relativa de milhã em convivência com arroz irrigado e soja.

201

The limiting behavior of solutions to p-Laplacian problems with convection and exponential terms

We consider, for $a,l\geq1,$ $b,s,\alpha>0,$ and $p>q\geq1,$ the homogeneous Dirichlet problem for the equation $-\Delta_{p}u=\lambda u^{q-1}+\beta u^{a-1}\left\vert \nabla u\right\vert ^{b}+mt^{l-1}e^{\alpha t^{s}}$ in a smooth bounded domain $\Omega\subset\mathbb{R}^{N}.$ We prove that under certain setting of the parameters $\lambda,$ $\beta$ and $m$ the problem admits at least one positive solution. Using this result we prove that if $\lambda,\beta>0$ are arbitrarily fixed and $m$ is sufficiently small, then the problem has a positive solution $u_{p},$ for all $p$ sufficiently large. In addition, we show that $u_{p}$ converges uniformly to the distance function to the boundary of $\Omega,$ as $p\rightarrow\infty.$ This convergence result is new for nonlinearities involving a convection term.Comment: 18 page

Cardiovascular disease behavioral risk factors among Latinos by citizenship and documentation status.

BACKGROUND:Studies have observed that recent Latino immigrants tend to have a physical health advantage compared to immigrants who have been in the US for many years or Latinos who are born in the United States. An explanation of this phenomenon is that recent immigrants have positive health behaviors that protect them from chronic disease risk. This study aims to determine if trends in positive cardiovascular disease (CVD) risk behaviors extend to Latino immigrants in California according to citizenship and documentation status. METHODS:We examined CVD behavioral risk factors by citizenship/documentation statuses among Latinos and non-Latino US-born whites in the 2011-2015 waves of the California Health Interview Survey. Adjusted multivariable logistic regressions estimated the odds for CVD behavioral risk factors, and analyses were stratified by sex. RESULTS:In adjusted analyses, using US-born Latinos as the reference group, undocumented Latino immigrants had the lowest odds of current smoking, binge drinking, and frequency of fast food consumption. There were no differences across the groups for fruit/vegetable intake and walking for leisure. Among those with high blood pressure, undocumented immigrants were least likely to be on medication. Undocumented immigrant women had better patterns of CVD behavioral risk factors on some measures compared with other Latino citizenship and documentation groups. CONCLUSIONS:This study observes that the healthy Latino immigrant advantage seems to apply to undocumented female immigrants, but it does not necessarily extend to undocumented male immigrants who had similar behavioral risk profiles to US-born Latinos

Integração lavoura-pecuária-floresta. 3. Escolha dos animais e formação de lotes.

O cultivo de forrageiras em sucessão ou em consórcio com culturas anuais em áreas agrícolas é uma prática que tem crescido nos últimos anos. Esta prática visa à cobertura do solo e à melhoria do ambiente para produção de grãos. Em algumas situações estas forrageiras têm causado problemas devido ao excesso de produção, ao não serem pastejadas. Utilizam esta prática os agricultores que têm obtido grande disponibilidade de forragem durante a estação seca, época em que falta pasto para os pecuaristas tradicionais. Isto representa uma oportunidade para os agricultores diversificarem sua atividade, com recria e engorda de gado, em sistema de integração lavoura-pecuária. Embora por falta de conhecimento sobre o assunto, esses agricultores têm encontrado dificuldades para a escolha do gado no momento da compra. Alguns conhecimentos zootécnicos relacionados à aparência dos animais, tais com sexo, raça, tipo, idade e desenvolvimento, qualidade zootécnica, estado sanitário, entre outros, permitem aos agricultores a identificação no campo dos animais com características mais adequadas ao seu sistema de produção. Em decorrência da boa qualidade e disponibilidade das pastagens produzidas nas áreas de lavoura esses agricultores podem produzir animais para mercados mais exigentes, que pagam melhor por um produto de qualidade superior. Para este sistema são necessários animais com bom potencial genético, que ainda jovens possam estar com peso e acabamento requerido pelos frigoríficos.bitstream/item/58731/1/DOC2011112.pd

On the Dirac delta as initial condition for nonlinear Schr\"odinger equations

In this article we will study the initial value problem for some Schr\"odinger equations with Diraclike initial data and therefore with infinite L2 mass, obtaining positive results for subcritical nonlinearities. In the critical case and in one dimension we prove that after some renormalization the corresponding solution has finite energy. This allows us to conclude a stability result in the defocusing setting. These problems are related to the existence of a singular dynamics for Schr\"odinger maps through the so called Hasimoto transformation.Comment: 17 pages, to appear in in AnIHP Ann Non Li

Percepção sobre as perspectivas da agricultura familiar na região do Alto Uruguai Catarinense.

Projeto/Plano de Ação: 06.09.06.001