872 research outputs found

    On Stability of Multivariate Polynomials

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    Synchronization of mechanical systems

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    Coordination of two robot manipulators based on position measurements only

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    In this note we propose a controller that solves the problem of coordination of two (or more) robots, under a master-slave scheme, in the case when only position measurements are available. The controller consists of a feedback control law, and two non-linear observers. It is shown that the controller yields ultimate uniformly boundedness of the closed loop errors, a relation between this bound and the gains on the controller is established. Simulation results on two twolink robot systems show the predicted convergence performance

    Race and Health Disparities Among Seniors in Urban Areas in Brazil

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    White seniors report better health than Black seniors in urban areas in Sao Paulo, Brazil. This is the case even after controlling for baseline health conditions and several demographic, socio-economic and family support characteristics. Furthermore, adjusted racial disparities in self-reported health are larger than the disparities found using alternative measures of functional health. Our empirical research in this paper suggests that the two most important factors driving racial disparities in health among seniors (in our sample) are historical differences in rural living conditions and current income. Present economic conditions are more relevant to racial disparities among poor seniors than among rich seniors. Moreover, racial differences in health not attributable to observable characteristics are more important when comparing individuals in the upper half of the income distribution.

    Mercadeo : Decisiones sobre el diseño de producto como ventaja competitiva

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    Al elaborar un producto se deben tomar diferentes decisiones en cuanto al diseño del mismo como; los atributos, seleccionar las funciones, el empaque, el etiquetado, las garantías, el servicio y el nombre de la marca que ayudarán a la entrega de los beneficios buscados del producto por el mercado objetivo. Ya que cada una de estas decisiones si se realizan como es debido proporcionarán al producto en concreto una ventaja competitiva en el mercado que se pretende penetrar. El mercadólogo debe conocer detalladamente todo lo referente al producto, y tomar las decisiones correctas al crear un producto adaptándolo a los deseos de los consumidores, desde los atributos y beneficios, la calidad, los niveles que se aplican en el producto, si será un producto de consumo o industrial y las diferentes etapas por las que pasa el producto durante su ciclo de vida, con el fin de crear un producto con ventaja competitiva ante los demás productos del mercado. Por esto en un mercado de competencia y diversidad se tiene que aprender del ingenio y la creatividad e innovar ideas que den como resultado cambios a favor del beneficio de los consumidores y la empresa. Por ende se tiene que hacer uso eficiente del diseño del producto, etiquetado, el servició, una marca que sea llamativa y fácil de posicionarse en la mente del consumidor, así como elegir un empaque apropiado que proteja al producto y que lo haga fácil de usar y transportar permitiendo tener resultados efectivos que nos ayudaran a crecer y triunfar en el mercado competitivo. En la presente investigación se utilizó una metodología de investigación documental, basándonos en fuentes de información secundarias como diferentes libros de marketing, seminarios de graduación y monografías relacionadas a nuestro tema de investigación

    Time Series Heterogeneous Co-execution on CPU+GPU

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    Time series motif (similarities) and discords discovery is one of the most important and challenging problems nowadays for time series analytics. We use an algorithm called “scrimp” that excels in collecting the relevant information of time series by reducing the computational complexity of the searching. Starting from the sequential algorithm we develop parallel alternatives based on a variety of scheduling policies that target different computing devices in a system that integrates a CPU multicore and an embedded GPU. These policies are named Dynamic -using Intel TBB- and Static -using C++11 threads- when targeting the CPU, and they are compared to a heterogeneous adaptive approach named LogFit -using Intel TBB and OpenCL- when targeting the co-execution on the CPU and GPU.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

    Energy equality for the compressible Primitive Equations with vacuum

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    We study the energy conservation for the weak solutions to the compressible Primitive Equations (CPE) system with degenerate viscosity. We give sufficient conditions on the regularity of weak solutions for the energy equality to hold, even for solutions that may include a vacuum. In this paper, we give two theorems, the first one gives regularity in the classical isotropic Sobolev and Besov spaces. The second one state result in anisotropic spaces. We get new regularity results in the second theorem because of the special structure of the CPE system, which is in contrast to compressible Navier-Stokes equations
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