Christel Lenk: Freiberufler in der Weiterbildung. Empirische Studie am Beispiel Hessen (Erwachsenenbildung und lebensbegleitendes Lernen; Bd. 16). Bielefeld: W. Bertelsmann Verlag 2010 (150 S.) [Rezension]

Rezension von: Christel Lenk: Freiberufler in der Weiterbildung. Empirische Studie am Beispiel Hessen (Erwachsenenbildung und lebensbegleitendes Lernen; Bd. 16). Bielefeld: W. Bertelsmann Verlag 2010 (150 S.; ISBN 978-3-7639-3348-8; 24,90 EUR)

Cryptanalysis of RadioGatun

In this paper we study the security of the RadioGatun family of hash functions, and more precisely the collision resistance of this proposal. We show that it is possible to find differential paths with acceptable probability of success. Then, by using the freedom degrees available from the incoming message words, we provide a significant improvement over the best previously known cryptanalysis. As a proof of concept, we provide a colliding pair of messages for RadioGatun with 2-bit words. We finally argue that, under some light assumption, our technique is very likely to provide the first collision attack on RadioGatun

The INEX 2010 Interactive Track: An Overview

In the paper we present the organization of the INEX 2010 interactive track. For the 2010 experiments the iTrack has gathered data on user search behavior in a collection consisting of book metadata taken from the online bookstore Amazon and the social cataloguing application LibraryThing. The collected data represents traditional bibliographic metadata, user-generated tags and reviews and promotional texts and reviews from publishers and professional reviewers. In this year’s experiments we designed two search task categories, which were set to represent two different stages of work task processes. In addition we let the users create a task of their own, which is used as a control task. In the paper we describe the methods used for data collection and the tasks performed by the participants

Age and gender differences in health-related quality of life of children and adolescents in Europe: a multilevel analysis

Objectives: To determine age and gender differences in health-related quality of life (HRQOL) in children and adolescents across 12 European countries using a newly developed HRQOL measure (KIDSCREEN). Methods: The KIDSCREEN-52 questionnaire was filled in by 21,590 children and adolescents aged 8-18 from 12 countries. We used multilevel regression analyses to model the hierarchical structure of the data. In addition, effect sizes were computed to test for gender differences within each age group. Results: Children generally showed better HRQOL than adolescents (P<0.001). While boys and girls had similar HRQOL at young age, girls' HRQOL declined more than boys' (P<0.001) with increasing age, depending on the HRQOL scale. There was significant variation between countries both at the youngest age and for age trajectories. Conclusions: For the first time, gender and age differences in children's and adolescents' HRQOL across Europe were assessed using a comprehensive and standardised instrument. Gender and age differences exist for most HRQOL scales. Differences in HRQOL across Europe point to the importance of national contexts for youth's well-bein

Standards ethischen Handelns in Verbänden der Erwachsenenbildung: zum Stand der Entwicklung einer erwachsenenpädagogischen Bereichsethik

Obwohl die erwachsenenpädagogische Forschung sich ethischen Fragen nur schwerlich verschließen kann, ist bisher kaum empirisch erforscht, welche Akteursgruppen berufsethische Fragen behandeln und welche konkreten ethischen Probleme sich in der Erwachsenenbildung stellen. Die Autoren gliedern das Feld der Erwachsenenbildung in drei Bereiche von Verbänden und Organisationen und untersuchen diese auf die Frage hin, welche ethischen Standards bereits vorhanden sind und wie diese implementiert wurden. Auf Basis verschiedener Kriterien führen sie eine Analyse öffentlich zugänglicher Dokumente durch. Die Autoren schlagen vor, einen Diskurs zu ethischen Standards in der Erwachsenenbildung zu etablieren, an dem sowohl Forscher/innen als auch die Akteure der Erwachsenenbildungspraxis partizipieren. Sie führen bestehende Ansätze von Berufsverbänden mit den Bemühungen nationaler Organisationen zusammen, welche damit befasst sind, professionelle Standards in der Erwachsenenbildung stärker zu institutionalisieren. So liefert der Beitrag eine Grundlage für weitere empirische Forschung zu ethischen Problemen von Lehrenden und Trainer/inne/n, deren professioneller Umgang mit ethischen Fragen zum Gelingen erwachsenenpädagogischer Lehr-/Lernsituationen beiträgt

The Reconfiguration of Public Authority in Developing Countries

In recent years, several scholars of world politics have observed a relocation of authority in different issue areas of global policy-making. This development appears to be particularly evident in the field of global climate politics where a number of authors have highlighted the gradual loss of authority by national governments and the emergence of new spheres of authority dominated by actors other than the nation-state. In fact, due to the existence of a regulatory gap in this policy domain, various new governance arrangements have emerged which work simultaneously at different levels (some top-down and others bottom-up) to cope with the problem of climate change. However, despite several broader descriptions and mapping exercises, we have little systematic knowledge about their workings, let alone their impact on political-administrative systems. Given these shortcomings, in this paper we explore how (and how far) different types of globally operating governance arrangements have caused changes in the distribution of authority within national governments and their public administration. We will focus on two stylized governance arrangements: one that operates bottom-up (i.e. Transnational City Networks, TCNs) and another that operates top-down (i.e. Reducing Emissions from Deforestation and Forest Degradation, REDD+). Departing from our hypotheses that the former is likely to lead to more decentralization and the latter to more centralization of environmental policy making, we will present some preliminary findings from our case studies in Brazil, India, Indonesia, and South Africa

New Results on Modified Versions of Ketje Jr

International audienceThis report documents the program and the outcomes of Dagstuhl Seminar 18021 "Symmetric Cryptography", which was held on January 7-12, 2018 in Schloss Dagstuhl-Leibniz Center for Informatics. The seminar was the sixth in a series of Dagstuhl seminars on "Symmetric Cryptography", previously held i

A Bioinformatics Approach

By regulating the timing of cellular processes, the circadian clock provides a way to adapt physiology and behaviour to the geophysical time. In mammals, a light-entrainable master clock located in the suprachiasmatic nucleus (SCN) controls peripheral clocks that are present in virtually every body cell. Defective circadian timing is associated with several pathologies such as cancer and metabolic and sleep disorders. To better understand the circadian regulation of cellular processes, we developed a bioinformatics pipeline encompassing the analysis of high-throughput data sets and the exploitation of published knowledge by text-mining. We identified 118 novel potential clock- regulated genes and integrated them into an existing high-quality circadian network, generating the to-date most comprehensive network of circadian regulated genes (NCRG). To validate particular elements in our network, we assessed publicly available ChIP-seq data for BMAL1, REV-ERBα/β and RORα/γ proteins and found strong evidence for circadian regulation of Elavl1, Nme1, Dhx6, Med1 and Rbbp7 all of which are involved in the regulation of tumourigenesis. Furthermore, we identified Ncl and Ddx6, as targets of RORγ and REV-ERBα, β, respectively. Most interestingly, these genes were also reported to be involved in miRNA regulation; in particular, NCL regulates several miRNAs, all involved in cancer aggressiveness. Thus, NCL represents a novel potential link via which the circadian clock, and specifically RORγ, regulates the expression of miRNAs, with particular consequences in breast cancer progression. Our findings bring us one step forward towards a mechanistic understanding of mammalian circadian regulation, and provide further evidence of the influence of circadian deregulation in cancer