排序方式： 共有56条查询结果，搜索用时 421 毫秒
11.
12.
In the early 1930s, the young Antoni Quintana-Marí undertook some research on Antoni de Martí i Franquès, one of the most
prominent Catalan scientists of the Enlightenment. This scientist worked in Tarragona, where Quintana-Marí lived. Quintana-Marí
learnt about Martí i Franquès from Josep Estalella, his teacher of physics and chemistry at the secondary school. It was while
researching on Martí i Franquès that Quintana-Marí became a true historian of science. He subsequently collaborated with other
Spanish and foreign historians of science in the early years of this discipline. Quintana-Marí never forgot that his passion
for history of science had been aroused by his school teacher. 相似文献
13.
Although not much has been written about older adults' use of academic libraries, they experience challenges navigating these considerable physical and online library spaces. Members of a university lifelong learning community were recruited for a 10-week diary study. They were asked to record their real-time information seeking behaviors related to their study groups, and the challenges they faced looking for or using information. They were also asked to rate their enjoyment to determine whether the joy of engaging in community learning extends to the information seeking process. Findings from sixteen diarists show that they sought information primarily on a specific topic, person, or book. They used a variety of resources but found books and periodicals most useful. They struggled with trust, technology, time management, library anxiety, information overload and dissemination. With increased understanding, librarians can be better equipped to reach older adults that are doing scholarly research and contribute to their success. 相似文献
14.
Romaguera D Tauler P Bennasar M Pericas J Moreno C Martinez S Aguilo A 《Journal of sports sciences》2011,29(9):989-997
The purpose of the present study was to investigate the socio-demographic and lifestyle determinants of physical activity practice, as well as the motivations for being or not being physically active in Spanish university students. A representative sample of students from a Spanish university (n = 2,051; 42.1% males; mean age 21.9, s = 4.8 years) participated in the present cross-sectional study. A questionnaire including questions regarding lifestyle, dietary habits, parents' characteristics, and physical activity habits was administered to the students. The socio-demographic and lifestyle determinants of physical activity practice were assessed using multivariable logistic regression. 68.4% of men and 48.4% of women reported to practise physical activity in the present sample. Those who practised physical activity consumed more fruits and were less likely to be smokers compared to non-physically active students. Also, physically inactive men spent more time in front of the computer and physically inactive women spent more time in front of the TV and were more likely to be frequent alcohol consumers. Maternal educational level and maternal physical activity habits were also important determinants of physical activity practice among men and women respectively. In conclusion, physically active students tended to engage in other healthy habits in the present population, suggesting the clustering of healthy or unhealthy lifestyle factors among specific subgroups. 相似文献
15.
Inma Rodríguez-Ardura Antoni Meseguer-Artola 《Interactive Learning Environments》2016,24(6):1030-1053
User retention is a major goal for higher education institutions running their teaching and learning programmes online. This is the first investigation into how the senses of presence and flow, together with perceptions about two central elements of the virtual education environment (didactic resource quality and instructor attitude), facilitate the user's intention to continue e-learning. We use data collected from a large sample survey of current users in a pure e-learning environment along with objective data about their performance. The results provide support to the theoretical model. The paper further offers practical suggestions for institutions and instructors who aim to provide effective e-learning experiences. 相似文献
16.
Three experiments are reported assessing whether rats prefer controllable over uncontrollable aversive shock. In Experiment 1, subjects chose between escapable and inescapable shock while relative shock duration varied parametrically. In Experiment 2, subjects again chose between escapable and inescapable shock, but duration was held constant and equal. The final experiment gave subjects a choice between avoidable and unavoidable shock under several signaling conditions. Choice behavior proved sensitive to relative shock duration and to predictability of shock but not to controllability of shock. 相似文献
17.
18.
We discuss the ways in which English and Catalan students perceive themselves as members of communities and as citizens and the role of schools in these perceptions. Questionnaire and interview data were collected and analysed from 583 secondary school students in a total of 9 schools that were known for their commitment to citizenship education in England and Catalonia. The research took place when issues of national and other identities were prominently discussed in the media and elsewhere and when significant changes were being introduced in both locations regarding citizenship education as a specific curriculum subject and also in the wider context of education and schooling. Our results suggest that while the English students in our sample understand citizenship in terms of a subjective identification, our Catalan students perceive citizenship as a legal and externally assigned status. We did not intend to obtain nationally representative samples but rather to gain in-depth knowledge of the data and to discuss the implications of these results for the differing purposes of citizenship education. We make recommendations for how school-based citizenship education may contribute to current challenges related to citizenship and identities. 相似文献
19.
Despite the important benefits for firms of commercial initiatives on the Internet, e-commerce is still an emerging distribution channel, even in developed countries. Thus, more needs to be known about the mechanisms affecting its development. A large number of works have studied firms' e-commerce adoption from technological, intraorganizational, institutional, or other specific perspectives, but there is a need for adequately tested integrative frameworks. Hence, this work proposes and tests a model of firms' business-to-consumer (called B2C) e-commerce adoption that is founded on a holistic vision of the phenomenon. With this integrative approach, the authors analyze the joint influence of environmental, technological, and organizational factors; moreover, they evaluate this effect over time. Using various representative Spanish data sets covering the period 1996–2005, the findings demonstrate the suitability of the holistic framework. Likewise, some lessons are learned from the analysis of the key building blocks. In particular, the current study provides evidence for the debate about the effect of competitive pressure, since the findings show that competitive pressure disincentivizes e-commerce adoption in the long term. The results also show that the development or enrichment of the consumers' consumption patterns, the technological readiness of the market forces, the firm's global scope, and its competences in innovation continuously favor e-commerce adoption. 相似文献
20.
Antoni Aguiló Marta Monjo Carlos Moreno Pau Martinez Sonia Martínez 《Journal of sports sciences》2013,31(17):1659-1669
AbstractThe aim of this study was to determine whether the highest vitamin C supplementation associated with complete bioavailability influences the plasma and blood mononuclear cell IL-6 and IL-10 response to exercise. A double-blinded study of supplementation with vitamin C was performed. After 15 days of supplementation with vitamin C (500 mg · day?1, n = 16) or a placebo (n = 15), participants in the study completed a 15-km run competition. Blood samples were taken before and after competition. Oxidative stress markers, antioxidants, cortisol, IL-6 and IL-10 were determined in plasma or serum. IL-6 and IL-10 protein and mRNA levels were measured in blood mononuclear cells. Although higher plasma and blood mononuclear cell vitamin C levels were observed in the supplemented group when compared with the placebo one, the two groups showed identical exercise-induced changes in all the measured parameters. Exercise induced increased IL-6 and IL-10 levels in plasma and blood mononuclear cells. IL-6 and IL-10 mRNA levels in blood mononuclear cells increased after the competition. After recovery, IL-6 mRNA returned to basal levels and IL-10 mRNA levels remained elevated. In conclusion, exercise induced increased IL-6 and IL-10 production in blood mononuclear cells. However, vitamin C supplementation did not influence IL-6 and IL-10 response to exercise. 相似文献