Open source environment to define constraints in route planning for GIS-T

Route planning for transportation systems is strongly related to shortest path algorithms, an optimization problem extensively studied in the literature. To find the shortest path in a network one usually assigns weights to each branch to represent the difficulty of taking such branch. The weights construct a linear preference function ordering the variety of alternatives from the most to the least attractive.Postprint (published version

Temperature and Disorder Chaos in Low Dimensional Directed Paths

The responses of a $1+\epsilon$ dimensional directed path to temperature and to potential variations are calculated exactly, and are governed by the same scaling form. The short scale decorrelation (strong correlation regime) leads to the overlap length predicted by heuristic approaches; its temperature dependence and large absolute value agree with scaling and numerical observations. Beyond the overlap length (weak correlation regime), the correlation decays algebraically. A clear physical mechanism explains the behavior in each case: the initial decorrelation is due to `fragile droplets,' which contribute to the entropy fluctuations as $\sqrt{T}$, while the residual correlation results from accidental intersections of otherwise uncorrelated configurations.Comment: four pages, revtex4; minor modifications in the text and typos correcte

Grupo de Interesse de Pesquisa em Agricultura Familiar e Meio Ambiente - GIPAF: um recurso útil para o debate nacional via Internet.

O presente trabalho apresenta uma proposta de renovação de um serviço de apoio à pesquisa agropecuária, via internet, intitulado ?Grupo de interesse de pesquisa em agricultura familiar e meio ambiente - Gipaf?, coordenado pela Embrapa Meio Ambiente, em conjunto com a Embrapa Informática Agropecuária, que pode ser acessado em . Esta iniciativa visa consolidar o Gipaf como meio de debate importante para os pesquisadores engajados nos temas. Tendo como um dos pontos principais apontar desdobramentos para apoiar a formulação de políticas públicas, o objetivo principal do Gipaf é ser um ponto de referência nacional para informações científicas e análises sobre a pesquisa em agricultura familiar e meio ambiente, visando, em última instância, a promoção do desenvolvimento econômico e ambientalmente sustentável de unidades familiares

Fisgando oportunidades.

bitstream/item/128287/1/EDUFA-FISGANDO.pdf1. ed.Projeto Minibibliotecas

Design Science Research – Alternative Pathway for Aviation Training-Related Studies

Relevance is a permanent requirement of academic research, which means it is worth discussing methods and paradigms that provide the most useful outcomes to the most relevant problems, while maintaining rigor and criteria at a high level. The class of problems associated with aviation [pilot] training-related studies demands pragmatic solutions that are not always conspicuous from traditional qualitative or quantitative methods akin to the natural sciences. Hence, an interface between the natural and the artificial is required. The purpose of this theoretical essay is to review design science research (DSR) methodology, considering its applicability to aviation [pilot] training problems, thus, providing insight that will eventually help education practitioners in the field of aviation instructional design. To this end, DSR is analyzed in four distinct dimensions – concept, processes, outcomes, and evaluation – with reference to the seminal papers in information systems (IS) literature. DSR presents itself and is further discussed as a method that possesses the characteristics to build relevant solutions to prominent aviation training problems. DSR is supported by a systematic process that is rigorous and flexible at the same time. Its potential outputs/outcomes suit different classes of problems and are receptive to a significant number of different evaluation methods, all of which works to satisfy design science knowledge criteria demanded by academia

Esta é uma outra história.

bitstream/item/128292/1/EDUFA-HISTORIA.pdfProjeto Minibibliotecas