Teaching and discussing about risk: seven elements of potential significance for science education

The present paper takes its point of departure in risk being a relevant content for science education, and that there are many different approaches to how to incorporate it. By reviewing the academic literature on the use and definitions of risk from fields such as engineering, linguistics and philosophy, we identified key elements of the risk concept relevant for science education. Risk is a phenomenon of the future that may be conveyed by our activity, it is something that may or may not take place. Hence, at the core of risk we find uncertainty and consequence. Furthermore, the elements of probability and severity are relevant modifiers of the consequence, as well as both subject to uncertainty. Additionally, in framing, understanding and decision-making on risk, as individuals or society, we need to acknowledge that risk has both objective and subjective components, lying in the interface between knowledge and values. In this paper, we describe how these key elements were derived from the literature and derive a schematic model of the risk concept for the purpose of science education. We further discuss how this model may assist in planning, execution and evaluation of teaching activities explicitly or implicitly involving risk issues.     

Liberal arts colleges and Standards for College Libraries: a quantitative analysis

Standards for College Libraries provide benchmarks for collection size and professional staffing. Formulas from the Standards were used to compare the recommended collection size and number of professional librarians with the actual size of the collections and the number of librarians for a random sample of Baccalaureate I and II colleges.     

AN INVESTIGATION OF GENDER AND OTHER VARIABLES ON TIME TO COMPLETION OF DOCTORAL DEGREES

A sample of factors presumed relevant to thetime required to complete doctoral degrees (TTC) wasexplored in a survey of 154 recent graduates of NaturalScience, Social Science, and Humanities doctoral programs at York University. In addition to thevariables of gender and discipline, characteristics ofthe supervisory relationship, as well as the graduate'sfinancial situation and enrollment status, were investigated. On average, respondents took5.94 years to complete their degrees with students inthe Natural Sciences the fastest completers. Althoughthere were no significant gender differences in TTC, male graduates were more satisfied withtheir doctoral education overall and the quality ofsupervision they received (from both their supervisorsand their supervisory committees) than were females. Males were also more likely to collaborate withtheir supervisors in the preparation of research papers.With respect to financial support, respondents who wereslower completers reported receiving more years of teaching assistantships. Additionally,respondents from the Natural Sciences reported receivingmore years of teaching assistantships and researchassistantships than respondents from the other disciplines. A multiple regression analysisrevealed that the following combination of variablesaccounted for 30% of the variance in TTC: beginning thedissertation research early in the program, remaining with the original topic and supervisor, meetingfrequently with supervisor, and collaborating withsupervisor on conference papers.     

Learning to collaborate in a peer-tutoring situation: Who learns? What is learned?

The issue of “collaborating to learn” is tackled by analysing a peer-tutoring situation aimed at providing help to students with learning difficulties. The corpus consists of a six-lesson cycle between a 15 year-old student and her 14 year-old tutee who has difficulties with German. The analysis shows that the tutor and the tutee interactively construct the asymmetry and complementarity of their roles. As a consequence, what seemed at first sight to be the tutor’s discursive and guidance abilities appears, upon closer examination, to be the result of the students’ interactional work. In this particular case, the mode of collaboration which is achieved results in the tutor taking charge of the major part of the cognitive work.     

ATP and phosphocreatine utilization in single human muscle fibres during the development of maximal power output at elevated muscle temperatures

In this study, we examined the effect of muscle temperature (Tm) on adenosine triphosphate (ATP) and phosphocreatine utilization in single muscle fibres during the development of maximal power output in humans. Six male participants performed a 6-s maximal sprint on a friction-braked cycle ergometer under both normal (Tm = 34.3 degrees C, s = 0.6) and elevated (T(m) = 37.3 degrees C, s = 0.2) muscle temperature conditions. During the elevated condition, muscle temperature of the legs was raised, passively, by hot water immersion followed by wrapping in electrically heated blankets. Muscle biopsies were taken from the vastus lateralis before and immediately after exercise. Freeze-dried single fibres were dissected, characterized according to myosin heavy chain composition, and analysed for ATP and phosphocreatine content. Single fibres were classified as: type I, IIA, IIAX25 (1 - 25% IIX isoform), IIAX50 (26 - 50% IIX), IIAX75 (51 - 75% IIX), or IIAX100 (76 - 100% IIX). Maximal power output and pedal rate were both greater (P < 0.05) during the elevated condition by 258 W (s = 110) and 22 rev . min(-1) (s = 6), respectively. In both conditions, phosphocreatine content decreased significantly in all fibre types, with a greater decrease during the elevated condition in type IIA fibres (P < 0.01). Adenosine triphosphate content was also reduced to a greater (P < 0.01) extent in type IIA fibres during the elevated condition. The results of the present study indicate that after passive elevation of muscle temperature, there was a greater decrease in ATP and phosphocreatine content in type IIA fibres than in the normal trial, which contributed to the higher maximal power output.     

Abortion and Infanticide

Abstract

This issue introduces an occasional series where readers are invited to argue points of view, express opinions, raise issues they deem important ‐ or indeed disagree with an earlier point of view. Controversy need not be avoided! Contributions to the series, which should normally fall between 400 and 2000 words are now being sought.

The first contribution is concerned with abortion and infanticide and the moral problems thrown up by following certain lines of philosophical enquiry to their logical conclusion. Karin Bernath introduces the topic, pointing out that this is a topic intensely debated in the German‐speaking world, and Hans Furrer develops some of the philosophical implications in his paper. It is perhaps well to be reminded of these matters as the shades of World War II and the ideologies that underpinned it are once more in our minds.     

Quality in early childhood education and care: a case study of disadvantage

Large numbers of young children spend significant amounts of time in early childhood educational settings. Concerns about the quality of this experience have increased substantially in recent years. Further, as social inequalities in Australia continue to grow the gap between disadvantage and advantage widens despite overall levels of increased economic prosperity. Provision of quality early childhood education may be one important way to address disadvantage as international studies show that high quality early childhood education experience contributes to reducing inequality later in life. This study investigated the relationship between quality and disadvantage in a childcare centre in urban Australia. Employing a case study approach, building on Bronfenbrenner’s theory and previous literature, the study found that four key components affected the quality of childcare in this centre—physical environment, staff–child interaction, curriculum/program and family support. Importantly, staff knowledge and dedication were crucial to achieving quality.