Route planning is a challenging problem for urban computing that usually involves the processing of a huge amount of data and collaborative user feedback. Traditionally, route planning services are street-based, that is, even paths for a pedestrian are suggested in terms of streets. However, such models are not suitable for users with certain disabilities. To address this problem, we have performed a requirement analysis with a group of wheelchair-users and their companions to understand their urban mobility experience. Given that perspective, we describe in this article a sidewalk-based model to accommodate the needs for a wheelchair route planning service. The model is mathematically defined as a graph, where the vertices are the city block corners and the edges are the sidewalks or crosswalks. The edge costs are derived from important accessibility features, such as distance, path inclination, and existence and maintenance conditions of curb ramps, crosswalks, and sidewalks. The model has been designed so that user feedback is considered to help updating the model when accessibility issues are detected, by wheelchair-users and companions, or solved, by the department of city planning. We also present a route planning algorithm that provides a set of alternative routes based on accessibility conditions, and a shortcut recommender algorithm to support accessibility-related decision making by the department of city planning. Experiments, by using PgRouting and PostGIS with open data, are reported for a Brazilian city neighborhood to validate the model and the route planning service.

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RESUMOAtualmente poucos sites têm estrutura e conteúdo acessível a todos os tipos de usuários. A adequação deles é necessária para promover um ambiente igualitário. Este trabalho apresenta um método para a avaliação distinta da implementação de critérios de acessibilidade baseada em contexto por meio de um conjunto de fases do processo de engenharia web, que juntos auxiliam na criação de um site acessível. Palavras-chaveAcessibilidade, Critérios, Processo ABSTRACT Currently few sites have structure and content accessible to all user types, their suitability is necessary to promote an equal environment. This paper presents a method for assessing distinct accessibility guidelines implementation priorities based on context through a set of phases of the web engineering process, which together help to create an accessible site Author

Neste artigo, busca-se analisar técnicas de ataque com XSS, demonstrando esses ataques no ambiente de testes bWAPP, por meio dos principais payloads encontrados no Projeto OWASP. Apresentam-se também critérios para mitigar e corrigir as falhas encontradas. O método de ataque Cross-Site Scripting (XSS) é uma das vulnerabilidades frequentemente encontradas em aplicações web, uma vez que, permitem a injeção de scripts maliciosos que quando executados, podem acarretar graves problemas, como o sequestro de sessão e redirecionamento para sites maliciosos.