Navigation Behaviour On The Internet - A Qualitative Analysis Of Typical Search Strategies Of Users Of The German Education Server

Aufgabe von Bildungsportalen ist es, den „Normalnutzern“ den Zugang zu den gewünschten Informationen zu erleichtern. Die bisher vorliegenden empirischen Untersuchungen über das reale Suchverhalten von Internetnutzern beziehen sich im wesentlichen auf allgemeine Suchmaschinen. Ziel der vorliegenden Studie ist es, das Suchverhalten und die typischen Suchanfragen von Normalnutzern von Bildungsportalen in einer qualitativen Analyse zu untersuchen. Grundlage dafür waren Logfiles des Deutschen Bildungsservers aus dem Zeitraum Oktober 2001 bis April 2002. Diese wurden bearbeitet und zum einen auf typische Suchanfragen hin untersucht, zum anderen wurden Erkenntnisse über individuelle Suchstrategien herausgearbeitet und qualitativ analysiert. Diese Ergebnisse werden mit den Resultaten anderer empirischer Untersuchungen verglichen. Einige Schlussfolgerungen für die Weiterentwicklung von Bildungsportalen bilden den Abschluss der Untersuchung.The task of education portals is to make it easier for "normal users" to access the desired information. The empirical studies available so far on the real search behaviour of Internet users mainly refer to general search engines. The aim of the present study is to investigate the search behaviour and typical search queries of normal users of educational portals in a qualitative analysis. The basis for this were log files of the German Education Server from the period October 2001 to April 2002. These were processed and, on the one hand, examined for typical search queries and, on the other hand, insights into individual search strategies were worked out and qualitatively analysed. These results are compared with the results of other empirical studies. Some conclusions for the further development of education portals form the conclusion of the study

Mitgedacht: Roboter in meinem Leben - und jetzt? : Dokumentation eines Learning Circles zu Robotik und KI

Das Skript dokumentiert einen sechswöchigen Learning Circle zu Robotik und Künstlicher Intelligenz. Die Informationen wurden von den genannten Autor:innen kollaborativ zusammengetragen und stehen als offene Bildungsresource (OER) anderen Interessierten zur Verfügung

A New Unconventional Antiferromagnet, Yb3_3Pt4_4

We report the synthesis and basic properties of single crystals of a new binary compound, Yb$_{3}$Pt$_{4}$. The Yb ions in this compound are fully trivalent, and heat capacity measurements show that the crystal field scheme involves a doublet ground state, well separated from the excited states, which are fully occupied above $\sim$ 150 K. The heat capacity displays a large, weakly first order anomaly at 2.4 K, where a cusp is observed in the magnetic susceptibility signalling the onset of antiferromagnetic order. The entropy associated with this order is the full Rln2 of the doublet ground state, however the magnetic susceptibility in the ordered phase is dominated by a large and temperature independent component below the Neel temperature. The heat capacity in the ordered state originates with ferromagnetic spin waves, giving evidence for the inherently local moment character of the ordered state. The electrical resistivity is unusually large, and becomes quadratic in temperature exactly at the Neel temperature. The absence of analogous Fermi liquid behavior in the heat capacity and the magnetic susceptibility implies that Yb$_{3}$Pt$_{4}$ is a low electron density system, where the Fermi surface is further gapped by the onset of magnetic order.Comment: 8 pages, 9 figure

Agriculture, nutrition and education: On the status and determinants of primary schooling in rural Mali before the crises of 2012

This cross-sectional study examines the status and the determinants of primary education in food insecure areas of Mali. Net and gross enrolment ratios in primary school were between 0.3 and 0.4 for both girls and boys and well below national levels, highlighting a critical gap in terms of access to primary education. Schooling was found to respond to a broad range of determinants, including child's age and nutrition status, as well as on household consumption, on farm labour, teacher availability, and village level remoteness. Interestingly, no significant gender differences were found in terms of primary education. School meals were found to be associated with increased enrolment, attendance and attainment. The scale of the problem in Mali strongly suggests the need for investments in education and social protection to be prioritised and funded as part of national education policy and development strategies