An Environment Aware Learning-based SelfAdaptation Technique with Reusable Components

Abstract

Self-adaptive systems appeared in order to reduce the effort of manual software maintenance. Apart from software attributes, for example, different alternative software modules, self-adaptation decisions depend on environmental attributes, for example, service rate, bandwidth etc. Current well-known self-adaptation approaches can be further improved by incorporating environmental attributes. Moreover, reducing maintenance effort includes minimizing both operational and development effort. To reduce the effort of developing self-adaptive software, the constituent components should be reusable. This paper proposes a technique to incorporate environmental attributes to learning-based self-adaptation and to increase the reuse potential of self-adaptive system components. The environmental attributes are provided as a constraint to an optimization problem which results in an optimal software attribute selection. Design patterns for selfadaptive system components are proposed to improve its reusability. The proposed technique was validated on a news serving website called Znn.com. According to renowned reusability metrics such as Lines of Code (LOC), Message Passing Coupling (MPC) and Lack of Cohesion of Methods 4 (LCOM4), the proposed technique improved reuse potential. The website was further tested for adaptation effectiveness under two scenariosadaptation and without adaptation. According to our experiments, Adaptation gradually improved the main goal response time of the website where it performed poorly without adaptation.

Career Orientations and Professional Responsibility of Ukrainian Women with Different Sexual Orientations. Are Sexual Minorities Worse Adapted to Professional Activities?

“…Purpose of the article: to identify and compare career orientations and professional responsibility peculiarities in women with different sexual orientations to determine whether the representatives of SM in Ukraine are less adapted to professional activity than the representatives of the heterosexual majority. According to our hypotheses, career orientations and the level of responsibility, which differ significantly, disharmonious profiles of career orientations with very low scores on some orientations will indicate difficulties in the professional adaptation of SM representatives [8][9][10]. As D. M. Kaplan emphasizes: «In a perfect world, one free of discrimination and stigma, Gay, Lesbian, and Bisexual (GLB) workers would be expected to pursue careers no differently than anyone else.…”