Web service plays an important role in implementing Service Oriented Architecture (SOA) for achieving dynamic business process. With the mushrooming number of web services in public repositories, it is becoming vital to provide an efficient web service discovery with respect to a given consumer's requirement. Considerable efforts have been made to address this issue among which includes context aware discovery methods, which have been attained much importance. However, there are two major challenges in this kind of approaches. Firstly, the concept of context is too broad to be defined in a simpler way. As such a question has been raised on how to properly employ contextual information into web service discovery applica- tions. Secondly, a web service discovery process will return a large set of web service candi- dates, among which how to discern the best suited one has become a greater challenge. This research studies contextual information from a web service composition perspective and . explore the possibility of using personal profile to facilitate web service discovery, particu- larly focusing on web service selection as it is pointed out by some scholars that recommen- dation of a proper service is probably the most important task in web service discovery appli- cations. Since it is anticipated that a retrieved web service will often partake in some compo- sition processes, it can be argued that the web service composition provides some useful in- formation for web service discovery. Based on this hypothesis, two types of contextual infor- mation are identified to build up the personal profile, i.e. individual based usage history and group based usage history. The individual based usage history is the consumer's own experi- ence and its capacity is explored to show the feasibility in web service selection. However in reality it is inapplicable to rely on individual history to make decision. To overcome this kind of information insufficiency, a group based usage history is then developed to support coor- dination and knowledge sharing. Finally, a web service selection framework based on the proposed contextual information is presented. An experimental study is then conducted to validate its potential, result analysis is undertaken and some future work directions are identi- fied during the result analysis.

Thesis (M.Inf.) --University of Limpopo, 2008 / The aim of the study is to investigate which of the information delivery systems (communication strategies) established at government level are used by rural clinics, and whether such information delivery systems are accessible to rural end-users. A literature review discussing and assessing the use of information delivery systems was conducted. The survey method and semi-structured interviews were used to collect data from all Clinics at Ga- Molepo. The study revealed that rural end-users cannot access HIV/AIDS information because clinics use information delivery systems which are not acceptable and accessible to them. Recommendations for further study on the subject under investigation are provided. The study assumes that with the identified barriers and recommendations at their disposal HIV/AIDS campaigners will be in a good position to identify, package and employ information delivery systems which are suitable for end-users.