Adaptive progressive download based on the MPEG-4 file format

In this paper we describe how progressive download and adaptive streaming can be combined into a simple and efficient streaming framework. Based on the MPEG-4 file format (MP4) we use HTTP for transport and argue that these two components are sufficient for specifying an open streaming architecture. The client selects appropriate chunks from the MP4 file to be transferred based on (1) the header information (i.e. the “moov” box) in the first part of the file and (2) his observation of network throughput. The framework is completely client driven which allows for better server scalability and reduces signalling overhead. We discuss architecture and implementation issues such as complexity, interoperability and scalability and compare to 3GPP PSS Rel-6 adaptive streaming when appropriate. Measurements from a simple MP4/HTTP streaming client are presented showing that appropriate chunks are selected such that increased reliability is achieved.     

Der Internationale Beirat der Unesco für Lehrplanfragen

Ohne Zusammenfassung     

The Relative Efficiency of Departments at a Turkish Engineering College: A Data Envelopment Analysis

In this study, Data Envelopment Analysis is used to measure relative efficiencies of academic departments of an engineering college. Input and output criteria are determined and measured utilizing the academic personnel performance measurement scheme of the College. New measures are developed to compare departments of different disciplines. The discriminating power of the measurement models is improved by restricting criteria weights directly and by using a multiple criteria decision making approach. Sensitivity of the results to exclusion of a criterion and changes in relative importance of the criteria is analyzed. Evaluation of the results jointly by the college administration and the departments is explained for a successful efficiency improvement mechanism.     

Teaching Foreign Languages at a distance

This paper is about how to teach a foreign language at a distance, i.e. how to support the learning of a foreign language by students who are not taught by teachers face‐to‐face. Much experience about this has been collected by correspondence schools and similar organisations. Among the public bodies of importance here should be mentioned the state‐owned and state‐run French Centre National d'Enseignement par Correspondence and Athabasca University in Alberta, Canada. Little seems to have been published about teaching and learning foreign languages at a distance, although Rousseau 1977 and contributions to ICDE and EHSC conferences (in 1982 and 1979) have surveyed essential problem areas. Experiences of teaching English as a foreign language provide the basis from which many considerations are examined.     

Learning How (and How Not) to Weld: Vocational Learning in Technical Vocational Education

This article focuses on vocational learning in technical vocational education in upper-secondary school, with a special focus on the object of learning to weld. A concrete teaching situation where the learning object to weld is the focus of the interaction between a vocational teacher and an upper-secondary student was documented by a video camera and then analysed from two different perspectives: a conversation analytical perspective and a variation theory perspective. The combination of the two perspectives allows a study of learning that deals with issues regarding both form and content, which may increase our understanding of vocational learning in technical vocational education in upper-secondary school.     

Validity of Holland’s theory in adolescence: evidence from a Slovak sample

The underlying calculus assumption of Holland’s theory was tested in two samples of primary school students (N₁ = 400 and N₂ = 250) with an average age of 13.86 and 14.14 years, respectively. Both exploratory and confirmatory multidimensional scaling and Hubert and Arabie’s randomization test of hypothesized order relations were calculated. The circular spatial arrangement of RIASEC types was not confirmed in either of the two samples. The study discusses possible causes of the inappropriateness of using Holland’s model in an adolescent sample.

     

Secular youth and religious practice: candle lighting in Norwegian folk high schools

Although large international studies have defined Norway as one of the most secular countries in the world, Christian folk high schools in Norway have experienced record high attendance. This paper presents case studies of the religious education (RE) and practices of two Christian folk high schools in Norway. A survey shows that students at these schools can be considered representative of the confessional backgrounds and stated values of their cohort of Norwegian youth. The studied institutions have the declared goal of offering RE, of which an on-campus worship service is a central element. A large portion of the student body attends these services. Using a reconstruction of Etienne Wenger’s theory of communities of practice, the author analyses student participation in the school worship service, specifically in the act of candle lighting. Observations and student interviews indicate that the service can be described as a reflective practice representing a dialogic form of religion. This article contributes an analysis of the distinctive form of RE offered by Christian folk high schools in Norway. In a broader sense, it contributes to the understanding of secular youth and their relation to religious practice.