This paper has developed a novel multiobjective function for optimal sizing and sitting ofDistributed Generation (DG) units and capacitor banks in simultaneous mode to improve reliabilityand reduce energy losses. The proposed function consists of four objectives: Cost of Energy NotSupplied (CENS), System Average Interruption Duration Index (SAIDI), costs of energy loss andinvestment. A novel st...

This paper explains the possible uses of scenarios in product design. A scenario classification is proposed as a framework to create, use and reuse different types of scenarios in a product design process. Our aims are three-fold: (1) to obtain a better view on the extent to which scenarios can be useful to a product design process, (2) to identify in which specific areas of scenario-based desi...

This paper reports on the experiment PICGAL which aims to assess the beneets of using VDM to develop high reliability related software in the space industry in a practical way. The application used in this project is a code generator from a next generation environment to be used in the development of ground application software for boosters such as ARIANE V. The experiment is constructed as a p...

Using concrete stories about product or technology use, or ‘scenarios’, is a promising design approach. Nevertheless, design practices face uncertainties especially in the activities of identifying, creating and selecting scenarios. Based on a workshop series at a design company, specific problem areas in its scenario practice have been identified. Support is required in: (1) documentation of d...

Scenario-based design originates from the human-computer interaction and software engineering disciplines, and continues to be adapted for product development. Product development differs from software development in the former’s more varied context of use, broader characteristics of users and more tangible solutions. The possible use of scenarios in product design is therefore broader and more...

background policy makers need models to be able to detect groups at high risk of hiv infection. incomplete records and dirty data are frequently seen in national data sets. presence of missing data challenges the practice of model development. several studies suggested that performance of imputation methods is acceptable when missing rate is moderate. one of the issues which was of less concern...

Background Policy makers need models to be able to detect groups at high risk of HIV infection. Incomplete records and dirty data are frequently seen in national data sets. Presence of missing data challenges the practice of model development. Several studies suggested that performance of imputation methods is acceptable when missing rate is moderate. One of the issues which was of less concern...

While requirements elicitation has been established as a crucial phase of the systems development process, empirical research on the topic of requirements elicitation is sparse. In this paper we present a requirements elicitation scenario that can be used by researchers to evaluate different methods of eliciting a set of requirements. This scenario consists of an elicitation tasks, a system fea...