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Research in Science Education - Two 20-h modelling-based workshops focused on the explanation of thermally activated phenomena were held at the University of Palermo, Italy, during the Academic...  相似文献   
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The present study tests the assumption that the stable vs. unstable character of the structural relationship between groups influences the type of bias to which differentiation may lead, and affects the likelihood of identification with one's ingroup. Study 1 was conducted in Canada with university students and Study 2 in two French highschools; they both measured the impact of membership in a prestigious vs. a non-prestigious group on intergroup perceptions. In the Canadian sample, the structural relationship between groups was unstable, in a way that status asymmetry due to prestige differences might in time be eased out to the advantage of the less prestigious group. In the French study, the structural relationship was stable and not likely to evolve. As predicted, data from both samples' prestigious groups demonstrate a clear ingroup bias. Students from the less prestigious Canadian university situated in an ascending movement did not judge their competencies as lower than those of the prestigious university students, and further expressed the wish to enrol their children in their own university rather than the prestigious university. As expected, data collected from French high school students in the less prestigious study programme demonstrate a clear outgroup bias. Contrary to the initial hypothesis, in Canada, the prestigious university students identify less strongly with their ingroup than the less prestigious university students. This effect may be interpreted as participants distancing themselves from their ingroup prototype and it was also observed in the students of the prestigious study programme in the French high schools.  相似文献   
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INSIDE FAMILY VIEWING: ETHNOGRAPHIC RESEARCH ON TELEVISION'S AUDIENCES by James Lull (New York: Routledge, 1991—$55.00/17.95, ISBN 0-415-04414-6 hard, 0-415-04997-0 paper, 190 pp.)

PROGRESS IN COMMUNICATION SCIENCES, VOLUME X edited by Brenda Dervin and Melvin Voigt (Norwood, NJ: Ablex, 1991—$75.00 institutional price/$35.00 personal price, ISBN 0-89391-645-5, 336 pp.)

MEDIA RESEARCH TECHNIQUES by Arthur Asa Berger (Newbury Park, CA: Sage, 1991—$28.00/14.00, ISBN 0-8039-4179-X hard, 0-8039-4180-3, 148 pp.)

THE ANNUAL REVIEW 1990 by the Institute for Information Studies (a joint project of the Aspen Institute and Northern Telecom; for information write to Aspen Institute, Wye Center, PO Box 222, Queenstown, MD 21658, price not given, paper, ISBN 0-89843-094-0, 249 pp.)

COMMUNICATION THEORY: A JOURNAL OF THE INTERNATIONAL COMMUNICATION ASSOCIATION (Guilford Publications, 72 Spring St., New York, NY 10012—$60 for institutions/$30 for individuals, ISSN 1050-3293, quarterly)

CINCOM: COURSES IN COMMUNICATIONS 1989 compiled by Communications Library (Communications Institute, Lockbox 5891, 1535 Francisco St., San Francisco, CA 94101-5891—$35.00, paper, ISSN 0742-3632 and ISBN 0-934339-95-3, 100 pp.)

SESAME STREET RESEARCH BIBLIOGRAPHY: SELECTED CITATIONS RELATING TO SESAME STREET, 1969-1989 (June 1990, xx pp.)

WHAT RESEARCH INDICATES ABOUT THE EDUCATIONAL EFFECTS OF SESAME STREET (February 1991, 14 pp.)

“CHILDREN'S LEARNING FROM TELEVISION: RESEARCH AND DEVELOPMENT AT THE CHILDREN'S TELEVISION WORKSHOP,” Educational Technology Research and Development 38:4 (1990, 96 pp. ISSN 1042-1629)

SESAME STREET RESEARCH: A 20th ANNIVERSARY SYMPOSIUM (1990, 96 pp.)

CONTACT 1-2-3: RESEARCH BIBLIOGRAPHY (June 1990, 43 pp.)

GANNETT CENTER JOURNAL: “HIGHER EDUCATION IN THE INFORMATION AGE,” (Spring-Summer 1991, Vol 5, Nos. 2-3)

GANNETT CENTER JOURNAL: “MEDIA AND AMERICA'S SCHOOLS,” (Winter 1991, Vol 5, No. 1); both available from Gannett Center Journal, Columbia University, 2950 Broadway, New York, NY 10027—$5.00, paper, each, ISSN 0893-8342)

EXTENDING TELECOMMUNICATIONS SERVICE TO AMERICANS WITH DISABILITIES by Stuart Brotman (Annenberg Washington Program, 1455 Pennsylvania Ave. NW, Suite 200, Washington, DC 20004—free on request, paper, no ISBN given, 53 pp.)  相似文献   
116.
The purpose of this study is to examine the interactive effect of worldviews and media frames on policy preference. Using flooding as a case study, we examine the interplay of ecological worldviews and news framed as either emphasizing harmony with nature or mastery over nature on individuals' preference for flood protection policy. A total of 255 undergraduate students participated in a 2 (ecological worldviews: balance-with-nature vs. human-domination-over-nature) × 2 (media frames: harmony frame vs. mastery frame) between-subjects experiment. The findings indicate that both the balance-with-nature worldview and the human-domination-over-nature worldview have significant impacts on preference for flood protection policy. Furthermore, the harmony frame amplified the effect of the balance-with-nature worldview in supporting a natural approach to flood protection. In contrast, the mastery frame amplified the effect of the human-domination-over-nature worldview on the preference for a structural approach to flood protection. Implications are discussed.  相似文献   
117.
Previous research has demonstrated that compliance‐gaining strategies can he arrayed on an unidimensional continuum, anchored by positive, pro‐social strategies and negative, antisocial strategies (Hunter & Boster, 1987; Rolojf & Barnicott, 1978, 1979). Individual differences, including argumentativeness and verbal aggression (Boster & Levine, 1988), have been shown to affect one's ethical threshold. This ethical threshold is consistent with a Guttman simplex and determines both how many, as well as how antisocial, compliance‐gaining strategies individuals may consider using. Activists, who are highly involved and committed to their cause and who tend to be less verbally aggressive and more argumentative than the general public (Campo, 1999), are likely to have a lower threshold and to use more strategies. This study examines to what extent activism predicts one's ethical threshold, when controlling for the known effects of argumentativeness, verbal aggressiveness, and sex. Participants (N = 454) at two separate universities completed a repeated measures questionnaire that asked them to indicate their likelihood of use of 25 separate compliance‐gaining strategies. Based on respondents’ likelihood of use of these 25 strategies, the data were consistent with a Guttman simplex. A multiple regression model was tested, and indicated that one's ethical threshold is directly predicted by level of activism and verbal aggressiveness. Sex and argumentativeness were not found to be significant predictors in this revised model. In addition, activists used more strategies than non‐activists. Implications for advancing research related to activism and compliance‐gaining strategy selection are discussed.  相似文献   
118.
ABSTRACT

This article describes a library workshop for freshman hospitality management students enrolled at New York City College of Technology, CUNY, which features a focus on critical thinking. An active learning experience uses an element of surprise. Students evaluate the Website of a bankrupt company where information about the company's situation is not obvious. When the instructor guides the class to find unbiased information from newspapers, many students begin to think critically about sources.  相似文献   
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Abstract

In this study, we examined fat oxidation rates during exercise in obese pubescent boys. Three groups of pubescent boys (16 pre-pubescent, Tanner's stage I; 16 pubescent, Tanner's stage III; and 14 post-pubescent, Tanner's stage V) performed a graded test on a leg cycle ergometer. The first step of the test was fixed at 30 W and power was gradually increased by 20 W every 3.5 min. Oxygen consumption ([Vdot]O2) and carbon dioxide production ([Vdot]CO2) were determined as the means of measurements during the last 30 s of each step, which allowed us to calculate fat oxidation rates versus exercise intensity. Between 20 and 50% of peak oxygen consumption ([Vdot]O2peak), fat oxidation rate in relative values (mg · min?1 · kg FFM?1) decreased continuously with pubertal development. In the same way, the maximum rate of fat oxidation occurred at a lower percentage of [Vdot]O2peak (pre-pubescent: 49.47 ± 1.62%; pubescent: 47.43 ± 1.26%; post-pubescent: 45.00 ± 0.97%). Our results confirm that puberty is responsible for a decrease in fat free mass capacities to use fat during exercise. The results suggest that post-pubescent obese boys need to practise physical activity at a lower intensity than pre-pubescent boys to enhance lipolysis and diminish adipose tissue and the consequences of obesity.  相似文献   
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