On Acquiescence and Ends-Less War: An Inquiry into the New War Rhetoric     

Jeremy Engels  William O. Saas 《Quarterly Journal of Speech》2013,99(2):225-232

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Forthcoming Conferences     

Gregor A. Ramsey 《International Journal of Science Education》2013,35(2):235-237

Thirty 14‐15‐year‐old pupils were taught about the effect of temperature and pressure on a gaseous reaction at equilibrium. Two problems were then given to the pupils and a word association test on a small number of carefully chosen stimulus words was administered in the context of the problems. The pupils were finally interviewed about what they had done in the tests. The results of all of the tests were analysed and compared for evidence of perception and strategy.

Various strategies were found to have been used by the pupils: one based on the formally correct perception of Le Chatelier's rule, one based on a perception in which the speed of a reaction is the factor that governs position of equilibrium (this was the major incorrect strategy), one that uses spurious analogies with more familiar factors (such as ‘catalyst') and one that reflects only superficial learning with no evidence of Le Chatelier's principle.

Comparisons with the classroom tests and the interview data revealed that about 60% of the word association test results produced responses that were criterial for the problem‐solving strategies adopted by the pupils, both correct and incorrect. The results show that this type of word association offers a means of unobtrusive, formative testing which, with experience, could be used to anticipate learning problems in science lessons.  相似文献   

Expediency‐based practice? Medical students' reliance on Google and Wikipedia for biomedical inquiries     

Terry Judd  Gregor Kennedy 《British journal of educational technology : journal of the Council for Educational Technology》2011,42(2):351-360

Internet usage logs captured during self‐directed learning sessions were used to determine how undergraduate medical students used five popular sites to locate and access biomedical resources. Students' perceptions of each site's usefulness and reliability were determined through a survey. Google and Wikipedia were the most frequently used sites despite students rating them as the least reliable of the five sites investigated. The library—the students' primary point of access to online journals—was the least used site, and when using Google less than 40% of pages or resources located by students were from ‘high’ quality sources. Students' use of all sites' search tools was unsophisticated. Despite being avid users of online information and search tools, the students targeted in this study appeared to lack the requisite information‐seeking skills to make the most of online resources. Although there is evidence that these skills improved over time, a greater emphasis on information literacy skills training may be required to ensure that graduates are able to locate the best available evidence to support their professional practice.  相似文献   

Question     

John Engels 《Academic Questions》1996,10(1):40

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The muscle activity paradox during circular rhythmic leg movements   总被引：1，自引：0，他引：1  

J P Clarys  J Cabri  R J Gregor 《Journal of sports sciences》1988,6(3):229-237

A cyclist's legs make a simple 360 degrees circular and rhythmic movement, activated by a simple flexion-extension function in a sagittal plane. However, because of the simultaneous combination of leg rotation in the hip, knee and ankle joint with translation of the upper body, the general motion becomes quite complex. This complexity is increased by the anatomical interpretations of EMG readings taken during the pedalling cycle, indicating a high activity of 'flexor' muscles during the downward 'extension' of the leg (0-90 degrees propulsion phase of the pedalling cycle). This calls for an anatomical paradox. In order to verify these interpretations, the activity of six lower limb muscles was measured under field circumstances on nine elite cyclists using a portable EMG data acquisition system and active surface electrodes allowing remote (non-telemetric) monitoring of the cyclists' muscle activity patterns. Measurements were made during a 1000 m submaximal but constant effort and during a 200 m sprint. Confirmation of the anatomical paradox was found in both test circumstances. Analyses of the normalized EMG in combination with torque values of both hip and knee during the pedalling cycle indicate a zero torque at 135 degrees for the knee, while at this same angle the overall extensor activity ends in one leg and starts simultaneously in the other leg (at 315 degrees). Since the propulsion does not continue until 180 degrees, the flexor muscles have to be activated before the extension activity ends in order to generate the continuation of the circular motion until (and beyond) the bottom dead centre (180 degrees).(ABSTRACT TRUNCATED AT 250 WORDS)  相似文献   

Ökonomie des Fußballs     

Gregor Hovemann  Manfred Schubert 《Sportwissenschaft》2004,34(4):502-507

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Using video-stimulated recall to investigate teacher awareness of explicit and implicit gendered thoughts on classroom interactions     

Els Consuegra  Nadine Engels  Vicky Willegems 《Teachers and Teaching》2016,22(6):683-699

Teachers believe they don’t interact any differently with boys than with girls. However, an examination of the evidence base on gendered student–teacher interactions shows – at times contradicting – unequal interaction patterns for boys and girls. In this study, the videotaped lessons of 13 secondary school teachers in three schools are analysed by both the teachers themselves and the researchers. Video-stimulated recall is used to bring to the surface the thoughts, images and emotions that evoke teachers’ (re)actions in the classroom. Content analysis and thematic analysis of teachers’ recall reveal three things: (1) when recalling specific situations, gender imbalances in the thoughts and images that accompany teachers’ (re)actions come to the surface; (2) "video-stimulated recall" interviewing is a promising method to raise teacher awareness of these gendered thoughts and images; and (3) with a view to practitioners’ professional learning process, it is important for researchers to allow practitioners to co-investigate their practice.  相似文献   

The psychophysics of remembered duration     

J. Gregor Fetterman 《Learning & behavior》1995,23(1):49-62

Pigeons were trained on a psychophysical choice task to make one response after a 2-sec signal and a different response after a 10-sec signal. Delayed dimensional control was assessed by presenting durations intermediate to the short and long signals and by introducing delays between the signals and choice opportunities. In Experiment 1, choices after intermediate durations were not reinforced; in Experiment 2, one choice was reinforced after the three shortest durations and another was reinforced after the three longest durations. In Experiment 1, the slopes of the psychophysical functions decreased with increases in delays, but the decrease in stimulus control was not unbiased; choice probabilities decreased for longer durations, but did not increase for shorter durations. Experiment 2 revealed the same generalized loss of stimulus control on the temporal dimension, but not the same pattern of bias; temporal control was relinquished equally for shorter and longer durations. These results are evaluated in the context of the subjective shortening model of remembered duration (Spetch & Wilkie, 1983) and Staddon’s theory of timing and remembering (Staddon, 1984).  相似文献   

3. Christoph Butterwegge/Gudrun Hentges (Hrsg.): Politische Bildung und Globalisierung     

Gregor Lang-Wojtasik 《Zeitschrift für Erziehungswissenschaft》2003,6(2):296-297

Ohne Zusammenfassung  相似文献   

The processes involved in the solid-to-liquid phase transition     

Hubertus M. Thomas  Gregor E. Morfill 《Endeavour》1997,21(4):148-153

The detailed study of crystals and the dynamics of the melting process in two and three dimensions is a fundamental and interesting research topic, which is important for increasing our knowledge of solid state physics. In natural crystals, structure information can be obtained principally by Bragg-scattering of neutrons, electrons or photons on the crystal, followed by an analysis in Fourier space. Dynamical aspects cannot be investigated in these systems. Recently, a new crystalline system was discovered whose properties are such that the melting transition can be investigated in great detail — the ‘plasma crystal’. This article presents the results of such an investigation and shows evidence for the existence of intermediate phases between the solid, liquid and gaseous phases. The observed ‘structured’ phase transition may be specific for plasma crystals but, alternatively, it may indicate the existence of intermediate stages in the melting transition more generally.  相似文献