Economists have argued that commonly held African rangelands are suffering widespread degradation due to overstocking. However, in many areas, degradation is localized rather than widespread. Current common property models are insufficient for analysis of such degradation. A model is developed identifying conditions leading to spatial differences in rangeland condition. Analysis of longitudinal...

This article provides a review of the research published in Computers and Composition about teaching writing with distance-learning technology. The purpose of the article is to assess what research has been conducted in the context of a prominent journal in the field. Distance education is an emerging focus in the field of computers and writing, and the goal of this review is to provide a found...

The medical writings of early medieval western Europe c. 700 – c. 1000 have often been derided for their disorganised appearance, poor Latin, nebulous conceptual framework, admixtures of magic and folklore, and general lack of those positive features that historians attribute to ancient or later medieval medicine. This paper attempts to rescue the period from its negative image. It examines a n...

Dear Editor, Many years ago unprofessional supervisors were identified as one of the main reasons for the withdrawal of a student’s study. Recently in some universities, unethical supervision has become an increasing concern of students and ethic committees. The last few years has witnessed an increase in the withdrawal rate of students who quit their study because of the poor guidance of their...