Abstract
Roles are not a new concept, but they have been used in two different ways: as modeling concepts in a static view and as instance extensions in a dynamic view. For these views only the dynamic offers supporting languages. The static view, although proving the utility of roles in modeling, does not offer a programming language that allows developers to use roles all the way from modeling to programming. We try to overcome this by presenting our role language JavaStage, based on the Java language. We do this by designing and implementing a simple framework and then compare the results with its OO equivalent. Our results show that static roles are in fact useful when used in code and that JavaStage features expand role reuse.

Abstract
In this paper we experimentally evaluate the performance of a fiber supported radio application, namely WiFi IEEE802.11n, using a low power consumption base-station based on a reflective electro absorption modulator and commercial transceivers. We conclude that the proposed setup is suitable to achieve a transmission of 20 Mbit/s over a 4m wireless channel. A theoretical signal to noise ratio analysis is also carried out, based on experimental results. Finally, we evaluate the possibility of employing the proposed setup in a passive optical network, concluding that this solution may not be cost effective. © 2012 IIMC Ltd.

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In this paper we present the overall evaluation of the Quantitative Evaluation Framework (QEF) approach which has been applied in an operational teaching environment for the last year. This environment includes the development of a serious game, supported by a web platform and extended to mobile platforms, which is being supervised by the research group GILT (Graphics, interaction amp, learning technologies) under the frame of an international project. The serious game that has been developed is called "Time Mesh". Time Mesh is a funded quasi experimental educational software project which is being developed under the frame of a quality evaluation environment, Quantitative Evaluation Framework (QEF) (Escudeiro Paula and Bidarra José, 2006), that measures system quality throughout its development life cycle. The quality evaluation process started with a careful planning phase. It has included the purpose of the evaluation, the timing of the evaluation and who should be conducting the evaluation process. Moderating the development of "Time Mesh" with QEF assures the quality of the final product. © 2012 IEEE.