study of the engineering education from several aspects needs to be paid attention. in order to make ease the learning process, to get successful in educational courses and technical programs, and having a useful performance in working areas. these challenging issues make it necessary to educate engineers with ability of special competencies and skills as social capital, creativity, group worki...

Developing a data warehouse (DW) is a complex, time consuming and prone to fail task. Different DW models and methods have been presented during the last few years. However, none of them addresses the whole development process in an integrated manner. In this paper, we present a DW development method, based on the Unified Modeling Language (UML) and the Unified Process (UP), which addresses the...

This paper demonstrates an approach to requirements engineering with process models as the hub for a family of consistent sub-models. The process model taken as a starting point gives focus, and the different requirement perspectives are served through the enrichment of the process model in several dimensions. Different views into the model family give the well-known specification models; infor...

Software systems come and go through a series of passages that account for their inception, initial development, productive operation, upkeep, and retirement from one generation to another. This article categorizes and examines a number of methods for describing or modeling how software systems are developed. It begins with background and definitions of traditional software life cycle models th...

Requirements engineering (RE) tools are software tools which provide automated assistance during the RE process. The need for automated support varies in different projects. RE-tool support could clearly be useful if an organisation deals with requirements specifications containing many requirements which need to evolve over time. However, the mainstream RE practice relies on office tools (e.g....

Hydrogen gas (∼60% H2) was produced in a continuous flow bioreactor inoculated with heat-treated soil, and fed synthetic wastewater containing glucose (9.5 g l). The pH in the bioreactor was maintained at 5.5 to inhibit consumption of H2 by methanogens. The objective of this study was to characterize bacterial communities in the reactor operated under two different hydraulic retention times (HR...