Software variability modeling is a complex task. To manage this complexity, we introduce an approach called Svamp. The main contribution of Svamp is to model concepts through ontologies and offer tool support for capturing functional and quality variability in software product family architectures. Variability description languages are defined by different ontologies that provide meta-models. F...

One of the biggest risks in software requirements engineering is the risk of overemphasizing one quality attribute requirement (e.g., performance) at the expense of others at least as important (e.g., evolvability and portability). This paper describes an exploratory knowledge-based tool for identifying potential conflicts among quality attributes early in the software/system life cycle. The Qu...

introduction: acceptance test is a necessary procedure after spect system installation. the goal of this test is to reveal system's present condition, to compare it with manufacturer's specifications and also as a base for later tests. methods: this study investigated four spect systems in tehran. all of the quality control tests are performed on the basis of nema and iaea recommendations and b...

Quality assurance in medical services has become a more and more important issue. In order to achieve reliable results of DNA image cytometry as described and discussed in detail in the first part of this report [2], the conditions for reproducible preparation, measurement and interpretation have to be worked out, carefully followed and checked at various steps of the process in certain time in...

A large number of parameters are acquired during practical water quality monitoring. If all the parameters are used in water quality assessment, the computational complexity will definitely increase. In order to reduce the input space dimensions, a fuzzy rough set was introduced to perform attribute reduction. Then, an attribute recognition theoretical model and entropy method were combined to ...

Grid systems, which are composed of autonomous domains, are open and dynamic. In such systems, there are usually a large number of users, the users are changeable, and different domains have their own policies. The traditional access control models that are identity based are closed and inflexible. The Attribute Based Access Control (ABAC) model, which makes decisions relying on attributes of r...