Dynamic profiles and predictive values of some biochemical and haematological quantities in COVID-19 inpatients     

María Jos Castro-Castro  Laura García-Tejada  Ariadna Arbiol-Roca  Lourdes Snchez-Navarro  Loreto Rapún-Mas  Isabel Cachon-Surez  Marta lvarez-lvarez  Dolors Dot-Bach  Roser Güell-Mir  Anna Corts-Bosch de Bassea  Macarena Dastis-Arias  Ana Sancho-Cerro  Noelia Díaz-Troyano  Teresa Escartín-Diez  Diego Muoz-Provencio  Rosa Navarro-Badal 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2022,32(1)

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Full-income and price elasticities of demand for German public theatre     

Marta Zieba 《Journal of Cultural Economics》2009,33(2):85-108

This article provides estimates of price and income elasticities of demand for German public theatre, using a large and reliable data set for 178 theatres over 40 years (1965–2004). It is posited that the consumption of the performing arts is a time-intensive activity for which both a theatre ticket and leisure time are necessary. Thus, the impacts of ‘full-income’ (‘leisure time income’ added to disposable income) and the price of leisure time on theatre attendance are examined. The findings indicate that the demand for the performing arts is own-price inelastic. The disposable income elasticity is significant, positive and equals approximately one. In contrast, the full-income elasticity is well above one and greater than usual income elasticity indicating that the performing arts are a luxury good when leisure time income is included in the consumer’s budget. The positive full-income effect is, however, offset by the negative price of leisure effect indicating that leisure time is a complement for the performing arts. Additionally, three objective quality characteristics of theatrical productions which can positively influence theatre demand are examined.

Marta ZiebaEmail:

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Activity profile of top-class association football referees in relation to fitness-test performance and match standard   总被引：1，自引：1，他引：0  

Mallo J  Navarro E  Aranda JM  Helsen WF 《Journal of sports sciences》2009,27(1):9-17

The aim of this study was to examine the kinematic activity profiles, cardiovascular responses and physical fitness of top-class football referees (n=11) during the FIFA Confederations Cup 2005. Computerised match-analyses (n=9) were performed with a two-dimensional photogrammetric video system, and the cardiovascular demand imposed on the referees (n=12) was measured using heart rate recordings. Total distance covered was 10,218, s=643 m of which 3531, s=510 m was covered at high intensities (>3.6 m.s(-1)). Both total distance covered (r2=0.59; P=0.02) and high-intensity activities (r2=0.44; P=0.05) were related to the distance covered by the ball in the same match. The referees ran at high speed 37% further (P=0.01) in the actual tournament than during under-17 top-level officiating. After the 5-min interval during which high-speed running peaked, in the following 5 min the performance was reduced by 19% (P=0.01) in relation to the mean of the game. Mean heart rate was 161, s=9 b.min(-1) (86, s=3% of maximal heart rate (HRmax)). Mean heart rate (expressed as percentage of HRmax) was related in part (r2=0.36; P<0.01) to the number of high-intensity activities performed in the same 5-min interval. The results of this study show that: (1) kinematic activity profiles of top-class referees can be influenced by the distance covered by the ball; (2) the amount of high-speed running (>5 m.s(-1)) best describes the physical performance of referees; (3) heart rate recording can be a useful tool to determine the most intense periods of a match and (4) the new fitness tests adopted by FIFA were poor predictors of match activities.  相似文献   

A bibliometric analysis of the scientific literature on Internet, video games, and cell phone addiction          下载免费PDF全文

Xavier Carbonell  Elena Guardiola  Marta Beranuy    Ana Bells 《Medical Library and Historical Journal》2009,97(2):102-107

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Letters to Prospects     

Ilse Gerth  Felix Garcia Aznar 《Prospects》1976,6(1):159-160

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National and Institutional Policies on Open Access in the United States   总被引：2，自引：0，他引：2  

MartaMestrovicDeyrup MarthaFallahayLoesch 《图书情报工作》2005,49(6):37-44

National and institutional policies on open access are not yet fully established in the United States because of the manner in which the open access movement has evolved. In this report, the authors illustrate how the open access movement has evolved within each community libraries, universities, publishing companies, government agencies, the professoriate, public interest groups, and the U.S. Congress and note what trends now are beginning to emerge.  相似文献   

The implications of a connectivist learning blog model and the changing role of teaching and learning          下载免费PDF全文

Elaine Garcia  Ibrahim Elbeltagi  Mel Brown  Kerry Dungay 《British journal of educational technology : journal of the Council for Educational Technology》2015,46(4):877-894

While the use of Web 2.0 tools and specifically blogs is becoming increasingly popular within higher education (HE) and has been shown to promote learning, relatively little is known about the manner in which such tools may affect how teaching and learning may change as a result of the use of such tools. It is within this context that a connectivist learning model was created and has been further developed within this paper in order to consider the implications of how the use of blogs may change the manner in which teaching and learning occurs. Within this research, a case study of the use of collective student blogs utilized as part of a formally assessed module, undertaken within an HE institution, is utilized to explore the manner in which teaching and learning can be seen to change through a connectivist learning model of blog usage. From this case study, it appears that connectivism does provide a theoretical model for the way in which teaching and learning may change as a result of the use of blogs by learners. However, the experience of staff and students who undertook the project suggests that while a number of elements of the connectivist model can be identified, these are not seen universally among all students.  相似文献   

Learning to teach physics through inquiry: The lived experience of a graduate teaching assistant     

Mark J. Volkmann  Marta Zgagacz 《科学教学研究杂志》2004,41(6):584-602

This investigation examines the difficulties encountered by one graduate teaching assistant as she taught Physics for Elementary Education, a large‐enrollment, inquiry‐based science course taught at a public Midwestern university. The methodological approach of hermeneutic phenomenology served as the lens to investigate the research question, “What is the lived experience of a graduate teaching assistant as she learned to teach physics through inquiry to elementary education students?” We summarize the findings in terms of the blending of two conceptual frameworks: orientations to science teaching and professional identity. We learned that fundamental beliefs about the nature of science support certain orientations, and if those beliefs remain unchallenged, then the orientation is unlikely to change. Finally, we discuss implications for strategies that may assist college‐level instructors with changing their orientation to teaching science. © 2004 Wiley Periodicals, Inc. J Res Sci Teach 41: 584–602, 2004  相似文献   

Attenuation by contextual cues of retroactive interference of a conditional discrimination in rats     

Ward A. Rodriguez  Louis S. Borbely  Ronald S. Garcia 《Learning & behavior》1993,21(2):101-105

We investigated the effect of associating unique contextual cues with an interpolated learning task on retroactive interference in long-term memory. Rats were originally trained in a two-bar operant chamber with an auditory conditional discrimination stimulus. During interpolated learning, which occurred in either the original or a new context, some rats were trained on a probability learning task that did not include the auditory stimuli present during original learning. Subsequent retraining on the original conditional discrimination task in the original context showed that (1) significant retroactive interference occurs in rats, and (2) the presence of unique contextual cues during interpolated learning significantly reduces this interference. These results extend the conditions under which the susceptibility to retroactive interference can be altered by contextual cues.  相似文献   

Layers of Influence: Exploring Institutional- and State-Level Effects on College Student Views Toward Access to Public Education for Undocumented Immigrants     

Juan C. Garibay  Felisha A. Herrera  Marc P. Johnston-Guerrero  Gina A. Garcia 《Research in higher education》2016,57(5):601-629

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