Die technische Entwicklung und die inzwischen gegebene Allgegenwart von Geräten der Mobilkommunikation machen auch vor Schulen nicht Halt. Insbesondere verändert sie auch das im Informatikunterricht diskutierte Themenspektrum. Dieser Artikel diskutiert, an welchen Stellen die Mobilkommunikation als ein innovativer Ansatz für den Informatikunterricht dienen kann.

Recently, the 802.11e Working Group (WG) has proposed the Hybrid Coordination Function (HCF), which has a HCF Controlled Channel Access (HCCA) and an Enhanced Distributed Coordination Access (EDCA), in order to provide QoS in WLANs. In this paper an innovative HCCA-based algorithm, which will be referred to as Power Save Feedback Based Dynamic Scheduler (PS FBDS) providing bounded delays while ...

Total marine fisheries catches from the Exclusive Economic Zone of Benin and its coastal lagoons were estimated between 1950 and 2010. The reconstruction considered artisanal and industrial sectors and their discards, subsistence fisheries from the marine and lagoon waters including those generated by women for the first time. Small-scale catch estimates were obtained using catch per unit of ef...

Catch shares appear to lower fishing costs by eliminating redundant capacity. Theory suggests that catch shares may also alter within-season behavior and generate revenue benefits through improved market timing, higher product quality, and changes in the fresh/frozen product mix. Do catch shares alter within-season behavior to end the race to fish? Do catch shares cause ex vessel prices to incr...

Catch-up growth, a risk factor for later obesity, type 2 diabetes, and cardiovascular diseases, is characterized by hyperinsulinemia and an accelerated rate for recovering fat mass, i.e., catch-up fat. To identify potential mechanisms in the link between hyperinsulinemia and catch-up fat during catch-up growth, we studied the in vivo action of insulin on glucose utilization in skeletal muscle a...

Example 1. In a genetic study, n = 2217 patients are recruited, among which 1127 have bladder cancer. After whole genome sequencing, p = 475290 single nucleatide polymorphisms (or SNPs, a possible variation of the DNA sequence at one location) are measured on each patient. We construct a matrix X = (Xij)1≤i≤n,1≤j≤p where Xij = 1 if the ith patient has a mutation at jth location and 0 otherwise....

This paper is about moral panics over contemporary technology, which I call " technopanics. " I use two examples, the cyberporn panic of 1996 and the contemporary panic over online predators and MySpace, to demonstrate the links between media coverage and content legislation. In both cases, Internet content legislation is directly linked to media-fueled moral panics that concern uses of technol...

We present Catch, a protocol that encourages cooperation in multi-hop wireless networks comprised of autonomous nodes. While these nodes depend on each other to relay packets, scarce bandwidth and energy resources may motivate some nodes to cheat and avoid packet forwarding. Catch employs a novel technique based on anonymous messages to significantly increase the difficulty of cheating with imp...

Catch-up growth early in life (after fetal, neonatal or infantile growth retardation) is a major risk factor for later obesity, type-2 diabetes and cardiovascular diseases. These risks are generally interpreted alongside teleological arguments that environmental exposures which hinder growth early in life lead to programming of 'thrifty mechanisms' that are adaptive during the period of limited...