The influence of sitting posture on mechanics and metabolic energy requirements during sit-skiing: a case report

Several different sitting postures are used in Paralympic cross-country sit-skiing. The aim of this study was to evaluate the impact of sitting posture on physiological and mechanical variables during steady-state double-poling sit-skiing, as well as to determine how seat design can be improved for athletes without sufficient trunk control. Employing a novel, custom-designed seat, three trunk positions were tested while performing double-poling with submaximal oxygen consumption on an ergometer. Cycle kinematics, pole forces, and oxygen consumption were monitored. The athlete performed best, with longer cycle length and less pronounced metabolic responses, when kneeling with the trunk resting on a frontal support. For this case, a forward leaning trunk with knees below the hip joint was interpreted as most optimal, as it showed lower oxygen consumption and related parameters of performance during cross-country sit-skiing. Further investigations should examine whether such improvement is dependent on the level of the athlete’s handicap, as well as whether it is also seen on snow.     

CONFINTEA VI from a Canadian perspective

The 12-yearly International Conferences of Adult Education (CONFINTEA) organised by UNESCO are significant events in the ongoing global dialogues about adult learning and education (ALE) and its role within society. Thus, the latest conference held in Brazil in 2009 offered a major opportunity to consider and review developments about ALE policies and practices worldwide and encouraged both national governments and non-governmental organisations alike to examine their approaches to adult education and lifelong learning. After a review of the process that Canada adopted in following the UNESCO guidelines for preparing its country report, this paper focuses specifically on the involvement of Canada??s major academic adult education organisation and details its concerns with both the development and the substance of the report. Comparing it with the country reports of Finland, Sweden and the UK, the authors analyse the Canadian report and provide some explanatory reasons why, in their opinion, both the process and the result provided a less than complete picture of ALE in Canada and, in so doing, fell short of UNESCO??s aspirations for CONFINTEA.     

Governmental innovation support in Norway: Micro- and macro-level effects

The present article focuses on a government supported program in Norway. “The Innovation Plan”, aiming at overcoming the critical lack of innovation now facing industry. A framework based on the well known structure-conduct-performance paradigm serves as the theoretical point of departure. Both secondary and primary data are applied to assess micro- and macro-level effects.In this piece of research governmental R&D support was found to exert an impact on the level of R&D activities, as well as on the willingness to direct R&D resources towards projects representing solutions high in novelty. Various types of positive outcomes such as increased technical competence and spin-offs, as well as various types of economic effects could also be traced for the supported projects. Implications of the findings are highlighted.     

Problem‐based distance learning of energy issues via computer network

Problem‐based learning (PBL) modified for distance education (PBDiL = Problem‐Based Distance Learning) has been used for teaching energy issues at Uppsala University, Sweden. Collaborative learning in groups of seven to eight students was enabled by computer communication and enhanced the use of Internet. Two different teaching methods have been tried and are compared, both being influenced by methods used in conventional face‐to‐face PBL. The problem presentation was entirely built on pictures, and examination through student reports was successful. A student remark, ‘I study on my own but yet not alone’ shows the importance of social contact.     

Theoretical Commitment and Implicit Knowledge: Why Anomalies do not Trigger Learning

A theory consists of a mental model, laws that specify parameters of the model and one or more explanatory schemas. Models represent by being isomorphic to real systems. To explain an event is to reenact its genesis by executing the relevant model in the mind's eye. Schemas capture recurring structural features of explanations. To subscribe to a theory is to be committed to explaining a particular class of events with that theory (and nothing else). Given theoretical commitment, an anomaly, i.e., an event that cannot be explained, is an occasion for theory change, but in the absence of commitment, the response is instead to exclude the anomalous event from the domain of application of the theory. Lay people and children hold their theories implicitly and hence without commitment. These observations imply that the analogy between scientist's theories and children's knowledge is valid, but that the analogy between theory change and learning is not.     

Beyond rules and propositions: Reflections on Bereiter's concept of problem-centred knowledge

Bereiter's concept of problem-centred knowledge is criticized on two grounds. First, associating knowledge with particular problem types limits the use of that knowledge to those problem types, causing rather than curing mindlessness. Second, interesting problems are not independent of our knowledge but arise within particular knowledge structures. Hence, problems must be indexed by the knowledge structures they are relevant to, rather than the other way around. It is suggested that a more traditional concept of theoretical knowledge carries some of the same pedagogical potential as the concept of problem-centred knowledge without sharing its inherent difficulties.     

Some principles of intelligent tutoring

Research on intelligent tutoring systems is discussed from the point of view of providing moment-by-moment adaptation of both content and form of instruction to the changing cognitive needs of the individual learner. The implications of this goal for cognitive diagnosis, subject matter analysis, teaching tactics, and teaching strategies are analyzed. The results of the analyses are stated in the form of principles about intelligent tutoring. A major conclusion is that a computer tutor, in order to provide adaptive instruction, must have a strategy which translates its tutorial goals into teaching actions, and that, as a consequence, research on teaching strategies is central to the construction of intelligent tutoring systems.     

School Marks.

During a period of about 15 years after World War Two several attempts were made in Sweden to estimate the size of 'begåvningsreserven', i.e. the proportion of the population that did not reach the level of education they were intellectually capable to attain. The research activities engaged both psychologists and statisticians and the results were followed by a lively public discussion. The article concentrates on the methodological problems involved, which gave rise to rather unique contributions.     

’Non Scholae sed Vitae Discimus’. Life‐span perspectives on school learning

After a brief survey of the literature on life‐span effects of school education, a conceptual model is presented of the interplay between learning and selection effects within and outside formal education and how this interplay affects competencies among adults. This model serves as point of departure for a follow‐up study at the age of 32 of a representative sample of the birth cohort of 1948 which was first studied at the age of 13. In this article, path analyses are presented of the regression of educational level on background characteristics of the sample and of the regression of self‐rated competencies on background and education.