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141.
The duration of the final fixation before movement initiation – a gaze strategy labelled quiet eye – has been found to explain differences in motor expertise and performance in precision tasks. To date, research only addressed this phenomenon in situations without adversarial constraints. In the present study, we compared the quiet-eye behaviour of intermediately-skilled and highly-skilled basketball players in defended vs. undefended game situations. We predicted differences in quiet-eye duration as a function of skill and performance particularly resulting from late quiet-eye offsets. Results indicated performance-enhancing effects of long quiet-eye durations in the defended but not in the undefended game situation. Furthermore, in line with our prediction, later quiet-eye offsets were associated with superior performance elucidating the phenomenon’s relevance in online-demanding motor tasks. Further, earlier quiet-eye onsets were linked to successful performance supporting earlier suggestions that it is not only the duration but also the timing that matters. These findings not only extend the positive effects of the quiet eye in motor performance to dynamic game-play situations but also support the role of the quiet eye in response to programming and information processing respectively. 相似文献
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Autonomous vehicles must be programmed with procedures for dealing with trolley-style dilemmas where actions result in harm to either pedestrians or passengers. This paper outlines a Rawlsian algorithm as an alternative to the Utilitarian solution. The algorithm will gather the vehicle’s estimation of probability of survival for each person in each action, then calculate which action a self-interested person would agree to if he or she were in an original bargaining position of fairness. I will employ Rawls’ assumption that the Maximin procedure is what self-interested agents would use from an original position, and then show how the Maximin procedure can be operationalized to produce unique outputs over probabilities of survival. 相似文献
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Interviews with key scientists who had conducted research on Severe Acute Respiratory Syndrome (SARS), together with analysis
of media reports, documentaries and other literature published during and after the SARS epidemic, revealed many interesting
aspects of the nature of science (NOS) and scientific inquiry in contemporary scientific research in the rapidly growing field
of molecular biology. The story of SARS illustrates vividly some NOS features advocated in the school science curriculum,
including the tentative nature of scientific knowledge, theory-laden observation and interpretation, multiplicity of approaches
adopted in scientific inquiry, the inter-relationship between science and technology, and the nexus of science, politics,
social and cultural practices. The story also provided some insights into a number of NOS features less emphasised in the
school curriculum—for example, the need to combine and coordinate expertise in a number of scientific fields, the intense
competition between research groups (suspended during the SARS crisis), the significance of affective issues relating to intellectual
honesty and the courage to challenge authority, the pressure of funding issues on the conduct of research and the ‘peace of
mind’ of researchers, These less emphasised elements provided empirical evidence that NOS knowledge, like scientific knowledge
itself, changes over time. They reflected the need for teachers and curriculum planners to revisit and reconsider whether
the features of NOS currently included in the school science curriculum are fully reflective of the practice of science in
the 21st century. In this paper, we also report on how we made use of extracts from the news reports and documentaries on
SARS, together with episodes from the scientists’ interviews, to develop a multimedia instructional package for explicitly
teaching the prominent features of NOS and scientific inquiry identified in the SARS research.
Siu Ling Wong is an Assistant Professor, in the Division of Science, Mathematics and Computing in the Faculty of Education at The University of Hong Kong. She received her B.Sc. from The University of Hong Kong and her Ph.D. from the University of Oxford. Her research interests include promoting teachers’ and students’ understanding of nature of science and scientific inquiry, physics education, teacher professional development. Jenny Kwan is a PhD student in the Faculty of Education, at The University of Hong Kong. She received her B.Sc. from University of Sydney. She is now investigating in-service teachers’ classroom instruction on nature of science in relation to their intentions, beliefs, and pedagogical content knowledge. Derek Hodson is Professor of Science Education at the Ontario Institute for Studies in Education and Editor of the Canadian Journal of Science, Technology and Mathematics Education. His major research interests include: history, philosophy & sociology of science and its implications for science education; STSE education and the politicisation of science education; science curriculum history; multicultural and antiracist education; and science teacher education via action research. Benny Hin Wai Yung is Head, Associate Professor, in the Division of Science, Mathematics and Computing in the Faculty of Education at University of Hong Kong. His main research areas are teacher education and development, science education and assessment for science learning. His recent publications include Yung BHW (2006) Assessment reform in science education: fairness and fear. Springer, Dordrecht. 相似文献
Siu Ling WongEmail: |
Siu Ling Wong is an Assistant Professor, in the Division of Science, Mathematics and Computing in the Faculty of Education at The University of Hong Kong. She received her B.Sc. from The University of Hong Kong and her Ph.D. from the University of Oxford. Her research interests include promoting teachers’ and students’ understanding of nature of science and scientific inquiry, physics education, teacher professional development. Jenny Kwan is a PhD student in the Faculty of Education, at The University of Hong Kong. She received her B.Sc. from University of Sydney. She is now investigating in-service teachers’ classroom instruction on nature of science in relation to their intentions, beliefs, and pedagogical content knowledge. Derek Hodson is Professor of Science Education at the Ontario Institute for Studies in Education and Editor of the Canadian Journal of Science, Technology and Mathematics Education. His major research interests include: history, philosophy & sociology of science and its implications for science education; STSE education and the politicisation of science education; science curriculum history; multicultural and antiracist education; and science teacher education via action research. Benny Hin Wai Yung is Head, Associate Professor, in the Division of Science, Mathematics and Computing in the Faculty of Education at University of Hong Kong. His main research areas are teacher education and development, science education and assessment for science learning. His recent publications include Yung BHW (2006) Assessment reform in science education: fairness and fear. Springer, Dordrecht. 相似文献
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Frane Pastrovic Anita Madir Kristian Podrug Marko Lucijanic Tomislav Bokun Marko Zelenika Sanda Mustapic Adriana Unic Lovorka Derek Ivica Grgurevic 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2022,32(2)
IntroductionOesophageal varices are routinely diagnosed by esophagogastroduodenoscopy (EGD), and their bleeding has high mortality. We aimed to evaluate diagnostic performance of biochemical tests in comparison to elastography-based approaches, as non-invasive alternatives to EGD, for ruling-out high risk oesophageal varices (HRV).Material and methodsRetrospective analysis of patients (N = 861) who underwent liver stiffness measurement (LSM) by transient elastography (TE) in a single centre over 5-year period, with available results of EGD (within 3 months from LSM). Only patients with suspicion of compensated advanced chronic liver disease (cACLD) defined by LSM ≥ 10 kPa were included comprising the final cohort of 73 subjects. Original and expanded Baveno VI criteria (B6C), controlled attenuation parameter (CAP), platelet count (PLT), aspartate aminotransferase to PLT ratio index (APRI), Fibrosis-4 index (FIB4), model for end stage liver disease (MELD) score were evaluated against the results of EGD that served as the reference method.ResultsAnalysed patients had median age 62 years, 59/73 (0.81) were males, 54/73 (0.74) had alcoholic/non-alcoholic fatty liver disease, and 21/73 (0.29) had HRV. In multivariate logistic regression analysis only LSM and PLT were independently associated with HRV. The best performing tests for ruling-out HRV (% of spared EGD; % of missed HRV) were respectively: LSM < 20 kPa (53.4%; 0%), B6C (38%; 0%), Expanded B6C (47.9%; 4.8%); PLT > 214x109/L (21.9%; 0%); FIB4 ≤ 1.8 (21.4%; 0%), APRI ≤ 0.34 (12.3%; 0%). CAP, MELD = 6 alone or combined with PLT > 150(x109/L) did not show acceptable performance.ConclusionThe best performing biochemical tests for ruling-out HRV in our cohort of patients were PLT and FIB-4, but they were still outperformed by elastography-based approaches.Keyword: portal hypertension, cirrhosis, platelet count, esophageal varices, non-invasive tests 相似文献
146.
In this work, we demonstrate the use of a thin, self adherent, and clinically durable patch device that can collect fluid from a wound site for analysis. This device is manufactured from laminated silicone layers using a novel all-silicone double-molding process. In vitro studies for flow and delivery were followed by a clinical demonstration for exudate collection efficiency from a clinically presented partial thickness burn. The demonstrated utility of this device lends itself for use as a research implement used to clinically sample wound exudate for analysis. This device can serve as a platform for future integration of wearable technology into wound monitoring and care. The demonstrated fabrication method can be used for devices requiring thin membrane construction. 相似文献
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Dr Derek Cheung John Hattie Robert Bucat Graham Douglas 《Research in Science Education》1996,26(4):375-389
The study described in this paper investigated the degree of implementation of school-based assessment schemes for practical
science. An assessment scheme in Hong Kong was used as the context for the research. Five dimensions of implementation were
identified and a conceptual framework was built by breaking down each dimension into attributes and these into content areas.
The research method used in the study incorporated some modifications on most past designs in order to determine adequately
the construct validity of data and to examine any method-specific biases. Three measuring instruments (namely, a student questionnaire,
a teacher questionnaire and an observation schedule) were designed. The construct validity of student data was demonstrated
through confirmatory factor analysis and multitrait-multimethod analysis. Comparative analyses of students' perceptions, teacher
self-reports and independent observational data resulted in convergent findings for only three out of the ten attributes of
implementation. 相似文献