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With the increasing use of mobile devices to access the Inter-net anytime and anywhere, the relevance of disconnected operation has emerged. Disconnected operation allows users to execute applications during temporary failures in networks or when they explicitly decide to work off-line. This paper presents a system, called Jamp, that uses mobile computation(More)
Despite its unquestionable importance, software maintenance usually has a negative image among software developers and even project managers. As a result, it is common to consider maintenance requests as short-term tasks that should be implemented as quick as possible to have a minimal impact for end-users. In order to promote software maintenance to a(More)
The ever-increasing representativeness of software maintenance in the daily effort of software team requires initiatives for enhancing the activities accomplished to provide a good service for users who request a software improvement. This article presents a quantitative approach for evaluating software maintenance services based on cluster analysis(More)
Software Product Line (SPL) is a development paradigm that targets the creation of variable software systems. Despite the increasing interest in product lines, research in the area usually relies on small systems implemented in the laboratories of the authors involved in the investigative work. This characteristic hampers broader conclusions about(More)
The Open Services Gateway Initiative (OSGi) is a framework that supports the implementation of component-based, service-oriented applications in Java. The framework man- ages the life-cycle of modules (called bundles in OSGi) and provides means to publish and search for services. Moreover, it supports the dynamic install and uninstall of bundles. Nowadays,(More)
Establishing credible thresholds is a central challenge for promoting source code metrics as an effective instrument to control the internal quality of software systems. To address this challenge, we propose the concept of relative thresholds for evaluating metrics data following heavy-tailed distributions. The proposed thresholds are relative because they(More)
In this paper, we propose a defect prediction approach centered on more robust evidences towards causality between source code metrics (as predictors) and the occurrence of defects. More specifically, we rely on the Granger Causality Test to evaluate whether past variations in source code metrics values can be used to forecast changes in time series of(More)
Despite the interest and the increasing number of static analysis tools for detecting defects in software systems, there is still no consensus on the actual gains that such tools introduce in software development projects. Therefore, this article reports a study carried out to evaluate the degree of correspondence and correlation between post-release(More)
Several bug-finding tools have been proposed to detect software defects by means of static analysis techniques. However, there is still no consensus on the effective role that such tools should play in software development. Particularly, there is still no concluding answer to the following question usually formulated by software developers and software(More)
SUMMARY This paper presents Arcademis, a Java-based framework for communication middleware development. Arcademis consists of a set of abstract classes, interfaces and concrete components that define the general architecture of middleware systems. Its main objective is to support the implementation of non-monolithic and easily configurable middleware(More)