Singular perturbation problems have been studied by many mathematicians. Since the approximate solutions of these problems are as the sum of internal solution (boundary layer area) and external ones, the formation or non-formation of boundary layers should be specified. This paper, investigates this issue for a singular perturbation problem including a first order differential equation with gen...

This special issue of JPP is dedicated to Professor Shunichi Fukuzumi on the occasion of his retirement from the Osaka University, Osaka, Japan. The cover images are taken in part from Prof. Fukuzumi’s publications and website, and illustrates his research activities covering different areas of photochemistry and photocatalysis, in recent years. The current issue of JPP contains 52 papers from ...

This Special Edition of Sensoria: A Journal of Mind, Brain, and Culture presents a collection of papers in which a relatively recent pedagogical direction for universities is explored – a focus on learners rather than on the ‘sage on the stage’ (King, 1993). Until the 1990s, learning and teaching in universities worldwide tended to follow the sage on the stage model in which an ‘expert’ would i...

The current sluggish performance of the US economy follows one of the more remarkable booms in modern history. The late 1990s was a period of simultaneous output and productivity growth, low unemployment and stable inflation, culminating in an unemployment rate of only 3.9% in the fourth quarter of the year 2000. The absence of rising inflation during this period came as a surprise to many sinc...

You need not look far to find a slew of articles, white papers, and research reports describing the vulnerability of voice over IP systems. VoIP systems are vulnerable, but currently, the threat of actual attack to these systems is moderate. New vulnerabilities are being reported at an accelerating rate, such as the one that recently affected Cisco’s Call Manager (http://www.techweb.com/wire/ s...

Norms play an important role in establishing social order. The current literature focuses on the emergence, maintenance and impact of norms with regard to coordination and cooperation. However, the issue of norm-related conflict deserves more attention. We develop a general theory of “normative conflict” by differentiating between two different kinds of conflict. The first results from distinct...

There is an ever increasing interest in publishing Linked Open Datasets about scientific papers. The current landscape is very fragmented: some projects focus on bibliographic data, others on authorship data, others on citations, and so on. The quality is also heterogeneous and the production and maintenance of such datasets is difficult and time-consuming. In this paper we introduce the Semant...

Flexible and rigid methods coexisted in symplectic topology from its inception. While the rigid methods dominated the development of the subject during the last three decades, the balance has somewhat shifted to the flexible side in the last three years. In the talk we survey the recent advances in symplectic flexibility in the work of S. Borman, K. Cieliebak, T. Ekholm, E. Murphy, I. Smith, an...