Improving information retrieval using Medical Subject Headings Concepts: a test case on rare and chronic diseases     

SJ Darmoni  LF Soualmia  C Letord  MC Jaulent  N Griffon  B Thirion  A Névéol 《Journal of the Medical Library Association : JMLA》2012,100(3):176-183

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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   

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   

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   

A person-centered approach to achievement goal orientations in competitive tennis players: Associations with motivation and mental toughness     

Richard Gregory Cowden  Nicolas Mascret  Timothy Ryan Duckett 《运动与健康科学(英文)》2021,10(1):73-81

Background:Research on achievement goal orientations in sport has typically relied on the use of variable-centered approaches that tend to overlook population heterogeneity.In this study,we used a person-centered approach to identify subgroups of competitive tennis players according to unique combinations of achievement goal orientations and tested for subgroup differences in motivation and mental toughness.Methods:A sample of 323 competitive tennis athletes(69.35%male)between 15 and 25 years of age(17.60±2.40 years,mean±SD)completed the 3×2 Achievement Goal Questionnaire for Sport,Sport Motivation Scale Ⅱ,and Mental Toughness Index.Latent profile analysis was used to identify unique combinations of achievement goal orientations.Comparisons between latent subgroups on autonomous motivation,controlled motivation,and mental toughness were performed using analysis of variance.Results:Latent profile analysis supported 3 distinct patterns of achievement goal profiles that were primarily distinguishable based on valence of competence(i.e.,approach vs.avoidance).Analyses of variance indicated that athletes who were classified into subgroups that endorsed approach types of goals(regardless of the types of avoidance goals they endorsed)reported higher levels of autonomous motivation and mental toughness.Conclusion:Results indicated that athletes tend to pursue a number of achievement goals collectively rather than in isolation.Although approach goals are more commonly linked to adaptive psychological functioning and positive outcomes,avoidance goals may also be associated with desirable psychological characteristics if they are pursued in conjunction with approach types of achievement goals.  相似文献   

A scale-based approach to interdisciplinary research and expertise in sports     

Jorge Ibáñez-Gijón  Martinus Buekers  Antoine Morice  Guillaume Rao  Nicolas Mascret  Jérome Laurin 《Journal of sports sciences》2017,35(3):290-301

After more than 20 years since the introduction of ecological and dynamical approaches in sports research, their promising opportunity for interdisciplinary research has not been fulfilled yet. The complexity of the research process and the theoretical and empirical difficulties associated with an integrated ecological-dynamical approach have been the major factors hindering the generalisation of interdisciplinary projects in sports sciences. To facilitate this generalisation, we integrate the major concepts from the ecological and dynamical approaches to study behaviour as a multi-scale process. Our integration gravitates around the distinction between functional (ecological) and execution (organic) scales, and their reciprocal intra- and inter-scale constraints. We propose an (epistemological) scale-based definition of constraints that accounts for the concept of synergies as emergent coordinative structures. To illustrate how we can operationalise the notion of multi-scale synergies we use an interdisciplinary model of locomotor pointing. To conclude, we show the value of this approach for interdisciplinary research in sport sciences, as we discuss two examples of task-specific dimensionality reduction techniques in the context of an ongoing project that aims to unveil the determinants of expertise in basketball free throw shooting. These techniques provide relevant empirical evidence to help bootstrap the challenging modelling efforts required in sport sciences.  相似文献   

Is a single question of the Global Physical Activity Questionnaire (GPAQ) valid for measuring sedentary behaviour in the Chilean population?     

Nicolas Aguilar-Farias  Jaime Leppe Zamora 《Journal of sports sciences》2017,35(16):1652-1657

A study was conducted to assess the validity of the Global Physical Activity Questionnaire (GPAQ) for measuring sedentary behaviour (SB) in the Chilean adult population. About 217 adults (93/124 male/female, 43.8 ± 15.75 years) who were randomly selected during National Health Survey 2009–2010 completed the protocol. The participants wore an ActiGraph GT3X (AG) for 7 consecutive days and then completed the GPAQ (single-item question for measuring time spent sitting in a usual day). Validity was examined using Spearman’s correlation, mean bias and limits of agreement (LoA), with AG (vertical axis <100 counts · min^?1) as the reference standard for estimates of SB in bouts of 1 (AG1), 5 (AG5) and 10 (AG10) min. Agreement between the GPAQ and AG for classifying data into quartiles and tertiles was assessed with kappa method. The GPAQ showed fair correlation with AG1, AG5 and AG10 (range = 0.23–0.26), with large mean biases (range = ?293.9, ?76.12 min · day^?1). Agreement between the GPAQ and AG1, AG5 and AG10 was poor for categorising time spent in SB into tertiles and quartiles. The single question from the GPAQ has shown fair validity for measuring SB and poor ability for correctly classifying individuals into tertiles or quartiles of SB in a Chilean population.  相似文献