Using Food Science Demonstrations to Engage Students of All Ages in Science,Technology, Engineering,and Mathematics (STEM)     

Shelly J. Schmidt  Dawn M. Bohn  Aaron J. Rasmussen  Elizabeth A. Sutherland 《Journal of Food Science Education》2012,11(2):16-22

Abstract: The overarching goal of the Science, Technology, Engineering, and Mathematics (STEM) Education Initiative is to foster effective STEM teaching and learning throughout the educational system at the local, state, and national levels, thereby producing science literate citizens and a capable STEM workforce. To contribute to achieving this goal, we have assembled six food science demonstrations for use at all educational levels and have presented these lessons to students at the elementary through higher education levels. The focus of this article is to share these food science demonstrations and our experiences using them so that others can use them for engaging students in STEM disciplines, through food science, at any educational level. Featured demonstrations include: (1) liquid nitrogen ice cream: a matter of changing phases, (2) seeing our senses work together, (3) whipping up the cream, (4) milk versus dark: what is the difference?, (5) counting calories by burning them, and (6) culinary spherification: the wonders of cross‐linking. Overall, our experience with using these demonstrations has been very positive. Students appear engaged in the learning process and love to consume the demonstration end products. Downloadable handouts containing demonstration details for each demonstration are available as supporting information.  相似文献   

Were Women Really Underrepresented in Media Coverage of Summer Olympic Games (1984–2008)? An Invitation to Open a Methodological Discussion Regarding Sex Equity in Sports Media     

Nicolas Delorme 《Mass Communication and Society》2014,17(1):121-147

In previous literature, there is an important heterogeneity in how to proceed to determine whether media coverage of the Summer Olympics in relation to athletes' sex is equitable. Therefore, the aims of this study are to determine the most appropriate standards for this comparison and to use them to assess whether there are biases in the journalistic coverage of the Summer Games, using data from previous studies (n = 18). Results show that media coverage is far from being detrimental to women: They are either equitably represented (28.79%) or significantly overrepresented (46.97%). Indeed, all modalities combined, women are only underrepresented in 22.24% of cases. In most cases, these results significantly differ from those of previous research and stress the importance of and the need to take methodological precautions in this type of study.  相似文献   

Lifelong learning policy in two national contexts     

Palle Rasmussen 《International Journal of Lifelong Education》2014,33(3):326-342

This article describes and discusses the development of lifelong learning policy in two EU member states, Denmark and Portugal. The purpose is to show how different societal and historical contexts shape the development and implementation of lifelong learning policies, even though these policies have significant common elements. As a basis for the discussion an inventory of policy elements is presented. Denmark and Portugal have been chosen as examples of smaller EU member states with different historical, social and cultural characteristics. Developments and policies in the two countries, including the links with EU education policy, are described. The discussion includes comparison drawing on the inventory of policy elements. A main conclusion is that the different historical trajectories of the two countries remain very important for present-day education and for the advancement of lifelong learning policy. Early development of public primary education and popular adult education has provided a strong foundation for lifelong learning policy in Denmark while in Portugal not only institutional provision but also popular demand for lifelong learning has had to be built up relatively recently. EU education policy has had much more impact on lifelong learning policy in Portugal than in Denmark, because Portugal has had to depend much more on economic support from the EU social fund.  相似文献   

Using Ancient Chinese and Greek Astronomical Data: A Training Sequence in Elementary Astronomy for Pre-Service Primary School Teachers     

Cécile de Hosson  Nicolas Décamp 《Science & Education》2014,23(4):809-827

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Investigation of the hydro-mechanical behaviour of fouled ballast   总被引：1，自引：0，他引：1  

Yu-jun CUI  Trong Vinh DUONG  Anh Minh TANG  Jean-Claude DUPLA  Nicolas CALON  Alain ROBINET 《浙江大学学报(A卷英文版)》2013,14(4):244-255

In this study, a fouled ballast taken from the site of Sénissiat, France, was investigated. For the hydraulic behaviour, a large-scale cell was developed allowing drainage and evaporation tests to be carried out with monitoring of both suction and volumetric water content at various positions of the sample. It was observed that the hydraulic conductivity of fouled ballast is decreasing with suction increase, as for common unsaturated soils. The effect of fines content was found to be negligible. For the mechanical behaviour, both monotonic and cyclic triaxial tests were carried out using a large-scale triaxial cell. Various water contents were considered. The results were interpreted in terms of shear strength and permanent axial strain. It appeared that the water content is an important factor to be accounted for since any increase of water content or degree of saturation significantly decreases the shear strength and increases the permanent strain. Constitutive modelling has been attempted based on the experimental results. The model in its current state is capable of describing the effects of stress level, cycle number and water content.  相似文献   

Book Publishing     

Nicolas Barker  Peter Sutcliffe  Mary Hill  Wendell Cochran  Stanley Rice  Stanley Rice 《Communication Booknotes Quarterly》2013,44(10):154-155

The Oxford University Press and the Spread of Learning: An Illustrated History, by Nicolas Barker (London and New York: Oxford University Press, 1978 —$25.00)

The Oxford University Press: An Informal History, by Peter Sutcliffe (London and New York: Oxford University Press, 1978—$15.00)

Mary Hill and Wendell Cochran's Into Print: A Practical Guide to Writing, Illustrating, and Publishing (Los Altos, Calif.: William Kaufmann, Inc., 1977—$12.00/6.951)

Stanley Rice's Book Design: Systematic Aspects (274 pp., $17.50)

Stanley Rice's Book Design: Text Format Models (215 pp., $17.50)

John Y. Cole, ed. The Library of Congress in Perspective: A Volume Based on the Reports of the 1976 Librarian's Task Force and A visory Groups (New York: R.R. Bowker, 1978—$21.95)

Literary Market Place: 1978 Edition (New York: R.R. Bowker, 1978— $22.50, paper)  相似文献   

Technology‐enhanced Interactive Teaching of Marginal,Joint and Conditional Probabilities: The Special Case of Bivariate Normal Distribution     

Ivo D. Dinov  Scott Kamino  Bilal Bhakhrani  Nicolas Christou 《Teaching Statistics》2013,35(3):131-139

Data analysis requires subtle probability reasoning to answer questions like What is the chance of event A occurring, given that event B was observed? This generic question arises in discussions of many intriguing scientific questions such as What is the probability that an adolescent weighs between 120 and 140 pounds given that they are of average height? and What is the probability of (monetary) inflation exceeding 4% and housing price index below 110? To address such problems, learning some applied, theoretical or cross‐disciplinary probability concepts is necessary. Teaching such courses can be improved by utilizing modern information technology resources. Students' understanding of multivariate distributions, conditional probabilities, correlation and causation can be significantly strengthened by employing interactive web‐based science educational resources. Independent of the type of a probability course (e.g. majors, minors or service probability course, rigorous measure‐theoretic, applied or statistics course) student motivation, learning experiences and knowledge retention may be enhanced by blending modern technological tools within the classical conceptual pedagogical models. We have designed, implemented and disseminated a portable open‐source web‐application for teaching multivariate distributions, marginal, joint and conditional probabilities using the special case of bivariate Normal distribution. A real adolescent height and weight dataset is used to demonstrate the classroom utilization of the new web‐application to address problems of parameter estimation, univariate and multivariate inference.  相似文献   

A test of anxiety/uncertainty management theory: The intercultural adaptation context     

Mitchell R. Hammer  Richard L. Wiseman  J. Lewis Rasmussen  Jon C. Bruschke 《Communication quarterly》2013,61(3):309-326

Anxiety/Uncertainty Management theory, as formulated by Gudykunst and Hammer (1987a), proposes that intercultural adaptation outcomes are based on the two mediating dimensions of uncertainty reduction and anxiety reduction and sixteen secondary variables that systematically influence uncertainty and anxiety reduction. In this paper, the sixteen variables originally identified are categorized into four “fundamental factors”; (interpersonal saliencies, intergroup saliencies, communication message exchange, and host contact conditions). The present study examines this revised Anxiety/Uncertainty Management (AUM) theory of intercultural adaptation. A total of 291 international students at two universities in the United States participated in the study. The study found overall fit of the revised AUM theory vis‐a‐vis the two mediating factors of uncertainty and anxiety reduction, the importance of interpersonal saliencies for uncertainty reduction, and the importance of host contact conditions for facilitating feelings of comfort and reducing anxiety. Intergroup saliencies were significantly related to uncertainty reduction but not, contrary to expectation, to anxiety reduction. Communication message exchange (which consists of information gathering strategies and second language proficiency) was, again contrary to expectation, not significantly related to either uncertainty or anxiety reduction. Finally, cultural identity showed a small though significant negative relationship to intergroup saliencies, suggesting a stronger, ingroup identity was associated with increased uncertainty. The paper concludes by proffering explanations for the findings and suggestions for future research.  相似文献   

The academic and psychological benefits of exercise in healthy children and adolescents     

Martin Rasmussen  Karin Laumann 《European Journal of Psychology of Education - EJPE》2013,28(3):945-962

This review examines the psychological benefits exercise is connected to in healthy children and adolescents. Studies on the effect of exercise on academic performance, self-esteem, emotions, and mood were examined. Academic performance is found to be maintained when normal academic classes are reduced and replaced by an increase in exercise, physical activity, or physical education. Exercise seems to have a positive effect on several aspects of cognition and self-esteem in healthy children and adolescents. A positive connection between exercise and emotions and moods in children is found in the few studies that have been conducted.  相似文献   

Design and optimization of a double-enzyme glucose assay in microfluidic lab-on-a-chip     

Yegermal Tesfaw Atalay  Daan Witters  Steven Vermeir  Nicolas Vergauwe  Pieter Verboven  Bart Nicola?  Jeroen Lammertyn 《Biomicrofluidics》2009,3(4)

An electrokinetic driven microfluidic lab-on-a-chip was developed for glucose quantification using double-enzyme assay. The enzymatic glucose assay involves the two-step oxidation of glucose, which was catalyzed by hexokinase and glucose-6-phosphate dehydrogenase, with the concomitant reduction of NADP⁺ to NADPH. A fluorescence microscopy setup was used to monitor the different processes (fluid flow and enzymatic reaction) in the microfluidic chip. A two-dimensional finite element model was applied to understand the different aspects of design and to improve the performance of the device without extensive prototyping. To our knowledge this is the first work to exploit numerical simulation for understanding a multisubstrate double-enzyme on-chip assay. The assay is very complex to implement in electrokinetically driven continuous system due to the involvement of many species, which has different transport velocity. With the help of numerical simulation, the design parameters, flow rate, enzyme concentration, and reactor length, were optimized. The results from the simulation were in close agreement with the experimental results. A linear relation exists for glucose concentrations from 0.01 to 0.10 g l⁻¹. The reaction time and the amount of enzymes required were drastically reduced compared to off-chip microplate analysis.  相似文献