Necrotizing Sialometaplasia (NS) is a benign, self-limiting inflammatory disease of the mucus-secreting glands, and this illness mainly involves the minor salivary glands. The significance of NS resides in its clinical and histopathological resemblance to malignancy. We present here a case of necrotizing sialometaplasia on the soft palate, and this was accompanied by adenoid cystic carcinoma. W...

Consider the multicolored urn model where after every draw, balls of the different colors are added to the urn in proportion determined by a given stochastic replacement matrix. We consider some special replacement matrices which are not irreducible. For three and four color urns, we derive the asymptotic behavior of linear combinations of number of balls. In particular, we show that certain li...

This paper argues that Teacher Education could play a significant role in promoting social change. This however is only possible if teacher educators go beyond the dominant behaviourist and constructivist views that have constrained Teacher Education in Kenya and perhaps other countries in Eastern and Southern Africa and also embrace alternative approaches, particularly the sociocultural view o...

This paper presents a new algorithm to implement causal ordering. Causal ordering was first proposed in the ISIS system developed at Cornell University. The interest of causal ordering in a distr ibuted system is that it is cheaper to realize than total ordering. The implementation of causal ordering proposed in this paper uses logical clocks of Mat te rn-Fidge (which define a partial order bet...

Knowledge discovery is one of the humans' most creative activities. As is often pointed out, humans often draw figures in the process of reasoning and problem solving. Diagrammatic information from a figure gives us numerical and relational data for reasoning, and it also gives us cues for controlling reasoning. The author has developed four discovery systems in the domain of plane geometry. Th...

Charles Bean has written an informative discussion of unemployment that brings to a larger audience some parts of his comprehensive discussion of European unemployment (Bean, 1994). His current paper also discusses the role that policy might take to reduce unemployment. I will put policy issues aside initially to concentrate on the causes of unemployment. I begin by stating and commenting on fo...

In this paper, we investigate how interorganizational networks and interpersonal networks interact over time. We present a retrospective longitudinal case study of the network system that developed a novel aircraft material and analyze change episodes from a structurationist perspective. We identify five types of episodes in which interpersonal and interorganizational networks interact (persist...