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41.
Pedro B. Júdice Joo P. Magalhes Gil B. Rosa Duarte Henriques-Neto Megan Hetherington-Rauth Luís B. Sardinha 《运动与健康科学(英文)》2021,10(1):55
BackgroundEvidence on correlates relies on subjective metrics and fails to include correlates across all levels of the ecologic model. We determined which correlates best predict sensor-based physical activity (PA), sedentary time (ST), and self-reported cell phone screen time (CST) in a large sample of youth, while considering a multiplicity of correlates.MethodsUsing sensor-based accelerometry, we assessed the PA and ST of 2179 youths. A χ2 automatic interaction detection algorithm was used to hierarchize the correlates associated with too much ST (> 50th percentile), insufficient moderate-to-vigorous PA (MVPA) (<60 min/day), and prolonged CST (≥2 h/day).ResultsAmong youth 10–14 years old, the correlates for being inactive consisted of being a girl, not having sport facilities in the neighborhood, and not perceiving the neighborhood as a safe place, whereas in the youth 15–18 years old, the correlate for being inactive was not performing sports (9.7% chance of being active). The correlates for predicting high ST in the younger group was not performing sports (55.8% chance for high ST), and in the older group, the correlates were not owning a pet, perceiving the neighborhood as safe, and having inactive parents (63.7% chance for high ST). In the younger group, the greatest chances of having high CST were among those who were in the last elementary school years, who were girls, and who did not have friends in the neighborhood (73.1% chance for high CST), whereas in the older group, the greatest chance for having high CST was among those who were girls and had a TV in the bedroom (74.3% chance for high CST).ConclusionTo counteract ST and boost MVPA among youths, a specific focus on girls, the promotion of sport participation and facilities, neighborhood safety, and involvement of family must be prioritized. 相似文献
42.
We propose a conceptual framework to analyze technology adoption in mega infrastructure projects, and assess their potential to innovating large socio-technical systems. Drawing on an in-depth empirical analysis of Heathrow airport's Terminal 5 project, we find that innovation hinges on technology adoption decisions that are governed systematically by two intertwined determinants - assessment of expected profitability and development of absorptive capacity, both of which are distributed across various interdependent actors. On an ad hoc basis, technological decisions are also affected by other factors, namely attitudes toward risk, politics, and (lack of) established standards. We reveal how a schedule-driven project framing creates an underlying boundary condition that constrains the longitudinal process of building a ‘whole collective’ with capacity to absorb new technologies. The innovation potential of mega projects is thus subjected to a fundamental, unifying tension: on the one hand, they offer a one-off opportunity to invest in cutting-edge technologies and innovate socio-technical systems; on the other hand, project stakeholders have limited time to develop capacity to absorb novel technologies and negotiate differences on assessments of profitability and risk. Stakeholders may therefore be compelled to agree to adopt proven technologies upfront to reduce uncertainty and mitigate risks, thus limiting the innovation potential of new infrastructure development. 相似文献
43.
Tom R. Thomas Gil L. Etheridge Ben R. Londeree Wayne Shannon 《Research quarterly for exercise and sport》2013,84(4):709-714
Abstract The superiority of motor set reaction time over sensory set reaction time has been accepted since the 1880s. Recently, however, there has been work favoring the sensory set. This study attempted to reconcile the varied findings. Woodworth had suggested that set and stimulus intensity interact. To test that presumed interaction and related ideas, the study proposed to determine not only the effect of motor set and sensory set on reaction time (RT) and muscle electrical activity (MEA), but also, the relationship between motor set and sensory set RT and motor set and sensory set MEA. Twenty-four subjects were tested in sessions that included the placement of electrodes on the motor end point of the extensor digitorum muscle, set instructions, practice, and data collection. Data collection consisted of recording of RT and MEA for 96 trials, 12 recordings at each of four levels of auditory stimulus intensity for each of the two sets. An ANOVA for repeated measures produced a significant interaction between set and intensity for RT; thus the Woodworth prediction was upheld. The results seem best explained in terms of signal detection theory and the attention demands of movement. 相似文献
44.
Despite its glamour and elevated social status, the movie industry receives much assistance from governments around the world. Governments mainly use both direct (subsidies and tax credits) and indirect (screen quotas or censorship) tools to help their own domestic motion picture industries. This article presents evidence of an indirect government intervention in the Spanish movie industry. In 1999, the Spanish government mandated that operating TV networks invest 3% of their receipts on the production of movies in the Spanish language. Using a new dataset of Spanish movies produced between 2000 and 2008, this article studies the empirical relation between TV network participation on movie production and box office success. Private TV network participation (as opposed to public networks) through production (and not distribution) was found to be associated with higher box office revenues and gross profitability rates, even after controlling for movie production budgets. 相似文献
45.
In the past 2 decades, cable television and the Internet have greatly increased the availability of media content. The phenomenon has reinvigorated a longstanding debate about the effects of this media landscape, as people selectively get exposed to specific content. Based on U.S. national survey data, this article advances research in this area by analyzing the interplay between individuals' ideological predispositions, their selective exposure to cable news, and the relationship between selective exposure and their attitudes toward an issue with key policy-making implications: Mexican immigration. Results indicate conservative Republicans are more likely to watch FOX News, which is associated with negative perceptions of Mexican immigrants and higher support for restrictive immigration policies. Findings also suggest that liberals who get exposed to FOX News also show less support for Mexican immigration. 相似文献
46.
47.
Susana María Gil Jon Zabala-Lili Iraia Bidaurrazaga-Letona Badiola Aduna Jose Antonio Lekue Jordan Santos-Concejero 《Journal of sports sciences》2014,32(20):1931-1939
AbstractThe aim of this study was to analyse the talent identification process of a professional soccer club. A preselection of players (n = 64) aged 9–10 years and a final selection (n = 21) were performed by the technical staff through the observation during training sessions and matches. Also, 34 age-matched players of an open soccer camp (CampP) acted as controls. All participants underwent anthropometric, maturity and performance measurements.Preselected outfield players (OFs) were older and leaner than CampP (P < 0.05). Besides, they performed better in velocity, agility, endurance and jump tests (P < 0.05). A discriminant analysis showed that velocity and agility were the most important parameters. Finally, selected OFs were older and displayed better agility and endurance compared to the nonselected OFs (P < 0.05). Goalkeepers (GKs) were taller and heavier and had more body fat than OFs; also, they performed worse in the physical tests (P < 0.05). Finally, selected GKs were older and taller, had a higher predicted height and advanced maturity and performed better in the handgrip (dynamometry) and jump tests (P < 0.05).Thus, the technical staff selected OFs with a particular anthropometry and best performance, particularly agility and endurance, while GKs had a different profile. Moreover, chronological age had an important role in the whole selection process. 相似文献
48.
Jon Torres-Unda Idoia Zarrazquin Javier Gil Fátima Ruiz Amaia Irazusta Maider Kortajarena 《Journal of sports sciences》2013,31(2):196-203
Abstract We investigated the anthropometric, physiological and maturation characteristics of young players (13–14 years old) associated with being successful in basketball. Body parameters were measured (stature, total body mass, skinfolds and lengths) and physiological capacities were assessed by endurance, sprint (20 m), jump and dribbling tests. Chronological age (CA) was recorded and maturity estimated using predicted age at peak height velocity (APHV). Anthropometric analysis indicated that elite players were taller, heavier and had a higher percentage of muscle. Further, physiological testing showed that these elite players perform better in jump, endurance, speed and agility tests (especially in the agility and ball tests). In addition, these skills are correlated with point average during the regular season. More basketball players born in the first semester of the year are selected and there is a predominance of early-maturing boys among those selected for the elite team. Those who are more mature have advantages in anthropometric characteristics and physiological test results. In conclusion, around puberty, physical and physiological parameters associated with maturity and CA are important in determining the success of basketball players. These findings should be taken into account by trainers and coaches, to avoid artificial bias in their selection choices. 相似文献
49.
Tali Gil 《The International Journal of Art & Design Education》2019,38(2):360-375
The article describes a workshop that combines nature photography and haiku poems writing with the use of smartphones in an outdoor educational setting. The workshop's purpose is to enhance the experience of being close to nature by observation and introspection. The participants use photography and haiku‐writing as means of visual and textual self‐expression. While wandering in nature, they take pictures and then write haiku poems inspired by them. Later they upload their photos to a WhatsApp forum created for the workshop. At this stage, they can write new haikus, inspired by the pictures taken by other participants, and upload them too. By the end of the day, the participants have a joint artistic product that contains all photos and haikus created at the workshop. The photographs that were chosen as samples for this article are analysed with interpretive tools based on semantic theory and Barthes’ methodology, and take into consideration the Photovoice method's principles. The poems were analysed considering their content and artistic measures and in comparison, with haiku writing's principles, and then compared to the photographs’ visual content. The analysis shows that observing nature through the camera's eye and writing poems while close to nature can generate self‐expression and introspection. The use of mobile technology in the workshop does not intrude on the experience of being in nature; on the contrary, it is used to get the participants closer to it and to each other. The workshop described here contributes to the experience of meaningful learning through art. 相似文献
50.