Challenges in Developing Adaptive Educational Hypermedia Systems

Traditional educational hypermedia systems afford learners the “one size fits all” approach to learning (Brusilovsky, 2003, 2004; Chatti, Jarke, & Specht, 2010; Hsieh, Lee, & Su, 2013). In the “one size fits all” approach to learning each student in every cohort of students is given access to the same learning objects in the same way as every other student who is studying the same course. The learning objects or learning content stays static regardless of the learning requirements of different students

A change impact model for changeability assessment in object-oriented software systems

AbstractGrowing maintenance costs have become a major concern for developers and users of software systems. Changeability is an important aspect of maintainability, especially in environments where software changes are frequently required. In this work, the assumption that high-level design has an influence on maintainability is carried over to changeability and investigated for that quality characteristics. The approach taken to assess the changeability of an object-oriented (OO) system is to compute the impact of changes made to classes of the system. A change impact model is defined at the conceptual level and mapped on the C++ language. In order to experiment the model as a changeability indicator on large industrial software systems, an experiment involving the impact of one change is carried out on a telecommunications system. The results suggest that the software can easily absorb that kind of change and that well chosen conventional OO design metrics can be used as indicators of changeability