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The aim of the present study was to identify and analyze scientific evidence available in the literature to answer the following question: Are psychological disorders associated with the development of oral lichen planus (OLP)? Using scientific databases (PubMed, LILACS, and Science Direct), a literature search was conducted between December 2016 and January 2017, using previously selected keywords. Two independent reviewers critically assessed the results in three stages, strictly obeying the inclusion and exclusion criteria defined in the study protocol. We assessed paper quality based on STROBE (Strengthening The Reporting of Observational studies in Epidemiology). After analysis, we selected 14 papers, of which 10 showed evidence of association between psychological disorders (in particular, stress, anxiety, and depression) and the development of OLP. The paper-quality assessment by means of STROBE showed that 13 papers presented intermediate quality and one paper presented high quality. In the present systematic review, we found an association between psychological disorders and the development of OLP. K E Y W O R D Sanxiety, depression, oral lichen planus, stress, systematic review

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Change impact analysis techniques that underestimate impact may cause important financial losses from the point of view of an IT services company. Thus, reducing falsenegatives in these techniques is a goal with strong practical relevance. This work presents a technique that uses both static and dynamic analysis of object-oriented source code to improve resulting impact estimates in terms of recall. The technique consists of three steps: static analysis to identify structural dependencies between code entities, dynamic analysis to identify dependencies based on a succession relation derived from execution traces, and a ranking of results from both analyses that takes into account the relevance of dynamic dependencies. Evaluation was performed through prototype development and a multiple-case quantitative case study that compared our solution against a static technique and a dynamic one. Results showed that our hybrid technique improved recall between 90 and 115% compared to the static technique, and between 21.2 and 39% compared to the dynamic one.

A motivação tem um papel importante no processo de aprendizagem dos estudantes, podendo ajudá-los a enfrentar dificuldades. Neste estudo, investigamos como uma abordagem de ensino de programação para non-majors, que faz uso do ambiente Scratch, da linguagem de programação Python com a biblioteca Turtle e com o ambiente de desenvolvimento JES, influencia na motivação dos estudantes. Verificamos que o Scratch contribuiu para a motivação dos estudantes, enquanto que o JES não mostrou o mesmo desempenho. Além disso, destacamos, a partir de um modelo de motivação, um conjunto de variáveis que podem despertar, manter ou diminuir a motivação.