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The aim of this paper was to study the construction of children’s self-perception relying on Cooley’s hypothesis. More precisely, we were interested in the mediation effect of significant others’ actual appraisal on self-perception by the perception of others’ actual appraisal (i.e., reflected appraisal). First, we argued that this mediation effect would occur in the domains where children have feedback from significant others (here teacher or parents). Second, we took into account two measures of reflected appraisal: reflected appraisal assessed in a classic fashion and appraisal social support assessed with Harter’s scale (1985b). We argued that reflected appraisal assessed in a classic fashion would be a better mediator of the effect of actual appraisal on self-perception by reflected appraisal in comparison to appraisal social support. In order to test these hypotheses, we conducted a study with 126 children (age 8–9), 106 parents and six teachers. The results, taken as a whole, support these hypotheses.  相似文献   
85.

TELECOM REFORM: PRINCIPLES, POLICIES AND REGULATORY PRACTICES by edited by William H. Melody (Lyngby, Denmark: Den private Ingeniørfond, Technical University of Denmark, 1997‐$39.00, paper, ISBN 7–7381–071–1, 557 pp., tables figures notes, index, glossary, appendix)

RADIO CANADA INTERNATIONAL: VOICE OF A MIDDLE POWER by James L. Hall (East Lansing: Michigan State University Press, “Canadian Series No. 7,”; 1997—$24.95, paper, ISBN 0–87013–420–5, 295 pp., photos, notes, appendices, bibliography, index)

BITS ACROSS BORDERS: POLICY CHOICES FOR INTERNATIONAL MULTIMEDIA AND DIGITAL SERVICES: A Report of the Second Annual Aspen Institute Roundtable on International Telecommunications, Berlin, Germany, June 19–22, 1996, by Kenneth G. Robinson and Charles M. Firestone (Queenstown, MD: The Aspen Institute, 1997—$10.00, ISBN 0–89843–208–1, 55 pp., appendix)

IT'S A WIRED WORLD by Anne C. Leer (Oslo: Scandinavian University Press [Universitetsforlaget], 1996—L27.50, ISBN 82–00–42310–7, 188 pp., figures, appendices, notes, glossary)

THE POLITICAL ECONOMY OF COMMUNICATION: RETHINKING AND RENEWAL by Vincent Mosco (Thousand Oaks, CA: Sage Publications, 1996—$39.95/13.95, ISBN 0–8039–8560–6 hard, 0–8039–8561–4 paper, 320 pp., figures, tables, notes, index)

EBU YEARBOOK 1997 (Geneva: European Broadcasting Union, 1997—free by contacting the EBU, no ISSN given, 52 pp., tables, charts, photos)

LIVE, DIRECT AND BIASED? MAKING TELEVISION NEWS IN THE SATELLITE AGE by Brent MacGregor (London: Arnold/New York: St. Martin's Press, 1997—prices not given, ISBN 0–340–66224–7 hard, 0–340–66225–5 paper, 234 pp., table, references, index)

GLOBAL INFORMATION AND WORLD COMMUNICATION: NEW FRONTIERS IN INTERNATIONAL RELATIONS by Hamid Mowlana (London: Sage, 1997 [2nd ed.] $29.95, ISBN 0–7619–5256‐X hard, ISBN 0–7619–5257–8 soft, 270 pp., figures, selected bibliography, index)  相似文献   
86.
The webbing clothes moth Tineola bisselliella (Hummel, 1823) is one of the most common museum pests and can be found all over the world. The larvae damages objects made of feather, wool, fur, and other keratinaceous materials. Pheromone traps are important tools in integrated pest management, which allow the detection of infestations and evaluation of their extent. Organic-rich dust (detritus) or other materials of animal origin, such as dead birds, can be an alternative food source for the moths. This paper analyzes monitoring data collected with pheromone traps from six different museums in Vienna and Berlin and tries to differentiate between moths resulting from infested objects or moths coming from other food sources, such as organic-rich dust. Annual totals of moths trapped and catch rate (moths per trap) are important guides for selecting appropriate remedial measures. Long-term data (over six years) enabled us to interpret monitoring results and differentiate between active infestation of objects and cleaning or housekeeping problems. However, detailed knowledge of the site and buildings, availability of high-quality food for the larvae, and lack of regular cleaning are also important factors to consider when interpreting the data.  相似文献   
87.
Recent laboratory studies have suggested that heart rate variability (HRV) may be an appropriate criterion for training load (TL) quantification. The aim of this study was to validate a novel HRV index that may be used to assess TL in field conditions. Eleven well-trained long-distance male runners performed four exercises of different duration and intensity. TL was evaluated using Foster and Banister methods. In addition, HRV measurements were performed 5 minutes before exercise and 5 and 30 minutes after exercise. We calculated HRV index (TLHRV) based on the ratio between HRV decrease during exercise and HRV increase during recovery. HRV decrease during exercise was strongly correlated with exercise intensity (R = ?0.70; p < 0.01) but not with exercise duration or training volume. TLHRV index was correlated with Foster (R = 0.61; p = 0.01) and Banister (R = 0.57; p = 0.01) methods. This study confirms that HRV changes during exercise and recovery phase are affected by both intensity and physiological impact of the exercise. Since the TLHRV formula takes into account the disturbance and the return to homeostatic balance induced by exercise, this new method provides an objective and rational TL index. However, some simplification of the protocol measurement could be envisaged for field use.  相似文献   
88.
Abstract

The aim of the present study was to determine whether 4 months of intensified training would result in modified plasma insulin-like growth factor I (IGF-I), insulin-like growth factor binding protein 1 (IGFBP-1) or IGFBP-3 in eight competitive cyclists and eight sedentary individuals and to define the relationships of these factors with glucose disposal. Insulin sensitivity and glucose effectiveness — that is, the fractional disappearance of glucose independent of any change in insulinaemia — were measured with the minimal model (mathematical analysis of frequently sampled intravenous glucose tolerance test). Both glucose effectiveness and insulin sensitivity were higher in the cyclists than in the sedentary individuals, but did not increase further with training. IGF-I was higher in the cyclists than in the sedentary group only after training (P<0.05). Plasma IGFBP-1 and IGFBP-3 increased after training (38 and 20%, respectively; P<0.05) in the cyclists and were higher than in the sedentary individuals (P<0.05). IGF-I was negatively correlated with insulin sensitivity before and after training (r=?0.66 and ?0.67, respectively; P<0.05) and IGFBP-1 was negatively correlated with glucose effectiveness before and after training (r=?0.68 and ?0.77, respectively; P<0.05). Our results show that strenuous endurance training improves the somatotrope axis (growth hormone—IGF) and that IGFBP-1 may be involved in glucose homeostasis, possibly by limiting the exercise-induced increase in glucose disposal, in competitive cyclists.  相似文献   
89.
According to self-determination theory, when teachers establish an autonomy supportive climate in the classroom, students demonstrate high levels of self-determination and are intrinsically motivated. The aim of this study was to identify factors leading teachers (N=336) to report that they create such a climate. We conducted a path analysis in order to examine the respective roles of teachers’ implicit theories, their seniority, and their perceptions of pressures at work. We also attempted to find out whether these personal and contextual variables have a direct influence or are mediated by teachers’ self-efficacy. Our first finding was that a theory of academic ability as a fixed trait caused a drop in the teachers’ reported support for autonomy. On the other hand, the belief that academic abilities can be improved through students’ own efforts indirectly favored an autonomy supportive climate by acting positively on the teachers’ self-efficacy. Also, seniority had a significant positive effect on autonomy support that was direct, but was also mediated by self-efficacy. Finally, perceived pressures had a negative impact on reported autonomy support, but their influence was also mediated by self-efficacy.  相似文献   
90.
The aim of the present study was to determine whether 4 months of intensified training would result in modified plasma insulin-like growth factor I (IGF-I), insulin-like growth factor binding protein 1 (IGFBP-1) or IGFBP-3 in eight competitive cyclists and eight sedentary individuals and to define the relationships of these factors with glucose disposal. Insulin sensitivity and glucose effectiveness--that is, the fractional disappearance of glucose independent of any change in insulinaemia--were measured with the minimal model (mathematical analysis of frequently sampled intravenous glucose tolerance test). Both glucose effectiveness and insulin sensitivity were higher in the cyclists than in the sedentary individuals, but did not increase further with training. IGF-I was higher in the cyclists than in the sedentary group only after raining (P < 0.05). Plasma IGFBP-1 and IGFBP-3 increased after training (38 and 20%, respectively; P < 0.05) in the cyclists and were higher than in the sedentary individuals (P < 0.05). IGF-I was negatively correlated with insulin sensitivity before and after training (r = -0.66 and -0.67, respectively; P < 0.05) and IGFBP-1 was negatively correlated with glucose effectiveness before andafter training (r = -0.68 and -0.77, respectively; P < 0.05). Our results show that strenuous endurance training improves the somatotrope axis (growth hormone-IGF) and that IGFBP-1 may be involved in glucose homeostasis, possibly by limiting the exercise-induced increase in glucose disposal, in competitive cyclists.  相似文献   
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