We point out that there is a problem with the definition of homological critical value (as defined in the widely cited paper [2] by Cohen-Steiner, Edelsbrunner and Harer). Under that definition, the critical value lemma of [2] in fact fails. We provide several counterexamples and a definition (due to Bubenik and Scott [1]) we feel should be preferred and under which the critical value lemma doe...

Scott Baker’s article takes a creative approach to the question of whether the federal judiciary should receive a pay raise and concludes that the data counsel otherwise.1 While I am a great advocate of empirical analysis to inform questions such as this, and Professor Baker may have done the best job possible with the available measures, I fear that this study contributes little to the debate ...

It’s my pleasure to introduce the new Education department. Gitta Domik and Scott Owen— two well-recognized experts in the  eld—will coedit it. I introduced Gitta as a new editorial board member last issue. For more on this new department, see the sidebar on the next page. Scott Owen has also joined the board. Scott, as the ACM Siggraph president, among many other accomplishments, needs no int...

This paper examines the changing nature of ethnic and religious identification in Malaysia, drawing upon a survey of attitudes conducted in three locations in Malaysia. The paper argues that the widely perceived political shift from a prevailing ethnic Malay/non-Malay dichotomy towards a more religious Muslim/non-Muslim dichotomy is more complex that previous analyses have suggested. Moreover, ...

1 The research was sponsored by the Department for Communities and Local Government, UK. It was led jointly by the Local Governance Research Unit at De Montfort University, UK (Lawrence Pratchett) and the e-Democracy Centre at the University of Geneva, Switzerland (Uwe Seurdult and Fernando Mendez). Country reports were developed by specialist country analysts: Estonia Liia Hanni (e-Governance ...

Gray-Scott model has been studied extensively in recent years. However, most of the results are in one dimensional. In this paper, we study the 2-D Gray-Scott system. We rst construct two single pulse solutions and then we establish the stability and instability of such solutions in terms of the parameters involved.