Nowadays using online tools to support group collaboration has become a necessity. Online collaboration tools allow users to work together in easy and efficient way. A great number of such tools have been developed that provide a variety of different features. In this paper, we investigate the available features of online collaboration tools, the meanings of these features and identify their co...

there are several problems in matters concerning scientific explanation, the most important of which is offering a definition of explanation and classifying the different approaches taken in offering a model for scientific explanation. in this paper, we will go through the current approaches to explanation while presenting a definition of it. in their discussions about explanation, philosophers...

In recent years, software development with components has become more and more popular. Component technology promises efficient software development, emphasizing reliability and re-usability. Unfortunately, many current development environments do not integrate the component concept very well and therefore lack in the support of the common development steps when applied to components and compon...