Generation of road accident risk maps

http://citta-conference.fe.up.pt/editions/2013Knowing the factors that affect the likelihood of an accident occurrence has been increasingly challenging to the researchers given the huge social and financial costs that derive from road accidents. In Portugal, developments in this area have mainly involved interurban roads studies. However, according to ANSRi, about 70% of Portuguese road accidents occur in urban spaces, a trend common to most European countries. The lack of national or local information systems containing geo-referenced road accidents, geometric characteristics of roads, among others, hamper the creation of tools that help to assess the risk of exposure at a micro level, i.e. road intersections. The weaknesses mentioned above led us towards the implementation of models in a GIS-based environment in order to estimate the frequency of accidents for urban areas according to several breakdowns: road element, type of accident and the inclusion of explanatory variables related to road environment. One of the challenges faced by researchers when applying these models is the absence of data or its poor quality. Therefore, it is necessary to cross and analyse information from different sources, such as traffic variables (from model transportation planning), digital cartographic data, and other geometric variables, that may not be obtained in a direct way (e.g. using OpenStreetMap or Google Maps). In a further step, the estimation models will be programmed and applied according to the type of road element (e.g. intersections, roundabouts, segments). Finally, new information will be generated with all inputted data: a digital map with the number of accidents per road element. Such figures will need to be converted into something more meaningful for potential users, such as levels/categories (e.g. high, medium and low risk of exposure), which can be mapped. This paper proposes a methodology for automatic generation of road accident maps with those levels/categories. Thus, maps will serve as a decision support tool not only to insurers (who are likely to tax drivers more effectively, according to their exposure to risk), but also to drivers themselves (through generation of alarms that will allow them to tailor their driving performance), envisaging road safety improvement

Zoneamento de aptidão climática para a videira europeia no Estado do Piauí.

bitstream/item/80699/1/documento-194.pd

Comparing reverse complementary genomic words based on their distance distributions and frequencies

In this work we study reverse complementary genomic word pairs in the human DNA, by comparing both the distance distribution and the frequency of a word to those of its reverse complement. Several measures of dissimilarity between distance distributions are considered, and it is found that the peak dissimilarity works best in this setting. We report the existence of reverse complementary word pairs with very dissimilar distance distributions, as well as word pairs with very similar distance distributions even when both distributions are irregular and contain strong peaks. The association between distribution dissimilarity and frequency discrepancy is explored also, and it is speculated that symmetric pairs combining low and high values of each measure may uncover features of interest. Taken together, our results suggest that some asymmetries in the human genome go far beyond Chargaff's rules. This study uses both the complete human genome and its repeat-masked version.Comment: Post-print of a paper accepted to publication in "Interdisciplinary Sciences: Computational Life Sciences" (ISSN: 1913-2751, ESSN: 1867-1462

Zoneamento de risco climático para a cultura da soja no Estado do Piauí.

Introdução; Modelo de balanço hídrico; Modelo de espacialização; Mapas de risco climático; Conclusões.bitstream/item/37184/1/Doc167.pd

DETERMINAÇÃO da curva de retenção de água no solo em laboratório.

Determinação da curva de retenção; Coleta da amostra; Preparo da amostra; Saturação das amostras e membranas porosas; Introdução das amostras na câmara de pressão; Determinação da densidade aparente e do peso seco da amostra; Cálculos para determinação do conteúdo de água no solo; Obtenção da curva de retenção de água no solo. Equipe Técnica: Aderson Soares de Andrade Júnior, Edson Alves Bastos, Rafael Maschio e Everaldo Moreira da Silva.bitstream/CPAMN-2009-09/21443/1/curva_retencao.pd

Dissimilar Symmetric Word Pairs in the Human Genome

In this work we explore the dissimilarity between symmetric word pairs, by comparing the inter-word distance distribution of a word to that of its reversed complement. We propose a new measure of dissimilarity between such distributions. Since symmetric pairs with different patterns could point to evolutionary features, we search for the pairs with the most dissimilar behaviour. We focus our study on the complete human genome and its repeat-masked version.Comment: Submitted 13-Feb-2017; accepted, after a minor revision, 17-Mar-2017; 11th International Conference on Practical Applications of Computational Biology & Bioinformatics, PACBB 2017, Porto, Portugal, 21-23 June, 201

Água pluvial disponível para consumo de plantas agrícolas no âmbito de microrregiões no Pará.

bitstream/item/27579/1/Doc356.pdfDisponível também on-line

Densidade de plantio em cultivares de feijão-caupi de porte semiprostado.

O objetivo do presente estudo foi avaliar a resposta de cultivares de feijão-caupi de porte semiprostrado a diferentes densidades de plantio no cerrado de Roraima. O ensaio foi realizado no Campo Experimental Água Boa da Embrapa Roraima, no município de Boa Vista. O delineamento experimental utilizado foi o blocos ao acaso, em esquema fatorial com 4 cultivares (BRS Aracê, BRS Juruá, BRS Pajeu e BRS Xiquexique) e 5 densidades de plantio (60 mil, 100 mil, 140 mil, 180 mil e 220 mil plantas por hectare). Cada parcela útil foi composta por duas fileiras de 5,0 m de comprimento cada uma e espaçadas entre si de 0,80 m. A característica produtividade de grãos secos foi avaliada, sendo os dados submetidos à análise de variância. Não foi possível definir densidades de plantio para as cultivares avaliadas. BRS Aracê, BRS Pajeu e BRS Xiquexique foram as que apresentaram as maiores produtividades.CONAC 2012. Disponível em: http://www.conac2012.org/resumos/pdf/022c.pdf. Acesso em: 24 jun. 2013

Zoneamento de risco climático para a cultura do sorgo granífero no Estado do Piauí.

bitstream/item/95325/1/DOC1780001.pd

Zoneamento de risco climático para as culturas de milho e feijão-caupi consorciadas no Estado do Piauí.

bitstream/item/80701/1/documento-199.pd