A semi-presentation for a group G is a set of relations which characterises a set of generators of G up to automorphism. We discuss some techniques for finding semi-presentations and illustrate them by exhibiting semi-presentations on standard generators for the 26 sporadic simple groups and their automorphism groups. We then show how these semipresentations were used to check the data in the W...

How does the Web affect our dependence on different shopping information sources? We compared the perceived importance of four decision sources (self-evaluation, traditional word-of-mouth or WOM, electronic WOM or eWOM, and expert opinion) under three circumstances (one cannot use the Web, one can only use the Web, one can use both) for 6 different types of products (2 search, 2 experience, and...

This paper describes a method to acquire hyponyms for given hypernyms from HTML documents on the WWW. We assume that a heading (or explanation) of an itemization (or listing) in an HTML document is likely to contain a hypernym of the items in the itemization, and we try to acquire hyponymy relations based on this assumption. Our method is obtained by extending Shinzato’s method (Shinzato and To...

In this paper we present the evolution of the structure of the Chilean Web between 2000 and 2002. Our results show that although the Web grows as expected, also a significant part of it disappears. In addition, some components are much more stable than others. We also compare the expected life cycle of a Web site in the structure with the actual real data.

In this paper we present an overview of several Web surveys. The aim of this research is to study Web survey design characteristics that may influence participation in Web surveys (Lozar Manfreda, 2001; Vehovar et al., 2002). Except for a few studies (whose results we present below), the previous research has mainly studied the effect of a single factor, or a group of related factors on the res...

National standards have arisen in recent years to address the process of preparing teachers to incorporate technology into education in effective and appropriate ways; both pre-service and inservice teacher education now commonly include technology components. This presentation will describe the ways in which one particular College of Education in an urban setting has chosen to include technolo...

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T objective of this paper is to better understand the factors that competitive news providers consider to design or deliver news programmes. The focus is broadcast news where, in any programming time period, a viewer watches (or consumes) one programme. We assume that each viewer is interested in a limited set of topics and that her utility only comes from the “most interesting” news she observ...