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We revisit the dividend payment problem in the dual model of Avanzi et al. ([2–4]). Using the !uctuation theory of spectrally positive Lévy processes, we give a short exposition in which we show the optimality of barrier strategies for all such Lévy processes. Moreover, we characterize the optimal barrier using the functional inverse of a scale function. We also consider the capital injection p...

In this paper we discuss how information technology impacts erotic life. This has been a neglected issue in most of the literature, even the literature on IT in the home. We argue that current IT, in particular in the home, tends to marginalize erotic aspects of life, through developing domestic technology, without considering how it impacts conditions for erotic life in the home. We suggest th...

Z. Andjelkovic1, Ch. Geppert1,2, J. Krämer1, W. Nörtershäuser1,2, M. Vogel2, V. Hannen3, Ch. Weinheimer3, D.F.A. Winters3, D. Church4, D. Schneider5, S. Bharadia6, D. M. Segal6, R. Thompson6, and the HITRAP collaboration2 1Institut für Kernchemie, Johannes Gutenberg-Universität, Mainz, Germany; 2Gesellschaft für Schwerionenforschung, Darmstadt, Germany; 3Westfälische Wilhems-Universität, Münste...

Much attention has been paid in the recent literature to the notions of validity, thoroughness, and effectiveness of different Usability Evaluation Methods (UEMs). Calculation of these makes sense if a study aims to compare UEMs, but not, it is argued here, if a study aims to evaluate a given application. Illustrated by a case study employing different UEMs, it is argued here that for practitio...

The term Context of Use has been treated with much attention in HCI in recent years. In this paper, the integration of context information into task models will be described. The notion of context is formulated and used to annotate the task model. The reuse of such context-sensitive task models in light of task patterns is also examined.

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We give a characterization of right Noetherian semiprime semiperfect and semidistributive rings with inj. dimAAA 6 1.

The impact of new technologies is hard to predict. We suggest the value of theories of performativity in understanding dynamics around the convergence of biomedical and information technology. Drawing on the ideas of Butler and Foucault, we discuss a new, internal, context for HCI and raise potentially disturbing issues with monitoring health. We argue that by adopting explicitly social framing...