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61.

Background

The purpose of this study was to analyze the relationship between performance test parameters and match-related physical performance in professional soccer players.

Methods

To determine physical capacity, 28 male soccer players underwent several performance tests at the start of the seasons 2013/2014, 2014/2015, and 2015/2016. The following parameters were assessed: maximum running velocity (vmax), fixed (v4mmol/l) and individual anaerobic threshold (vIAS) during an incremental treadmill test; 30-m sprint time in a linear sprint test (LS30m); in a repeated-sprint test, the 30-m sprint time (RST30m) and performance decrement (RSTdecr); and countermovement jump height (CMJ). Match physical performance was quantified during the first ten official matches of each season using a computerized, camera-based tracking system. The following measures of match physical performance were considered: top running speed (TS), mean running speed (vØ), total distance covered (TD), number of sprints (SP), number of high-intensity running (HIR), and aerial duels won (AD+). Pearson correlation coefficients were used for statistical analysis.

Results

Moderate to very large correlations were found between the majority of performance test parameters and match performance variables, with a variability of correlations across the three seasons. Large relationships across all three seasons were only observed between vmax and TD, vmax and vØ, LS30m and TS as well as RST30m and TS.

Conclusion

This study demonstrates the relationship between several performance test parameters and match-related physical performance in professional soccer players, thereby supporting the test parameters’ criterion validity. vmax, LS30m, and RST30m seem to be the most consistent parameters.
  相似文献   
62.
Digital technologies allow teachers and students to experience new pedagogical approaches leveraging on interactivity and collaboration. Among the available techniques, digital storytelling (DST) has been usually regarded as an activity that can both enrich the teaching practices and foster students’ active behaviour. This paper aims at analysing to what extent a DST platform proposing the collaborative writing of a fictional story and leveraging on an active learning technique such as role-play can affect a variety of dimensions, namely students’ performance, commitment, creativity and social skills. Combining the analysis of the data-log automatically collected by the system with the evaluations given by teachers before and after the activity, this article shows that the use of a DST tool in the teaching practice can have positive effects on students, including the ones that usually manifest moderate scores for the previously mentioned dimensions. Additionally, semi-structured interviews and direct observations provide an insight on how the benefits stemming from the use of a DST tool in the classroom can especially lie on the collaborative process that is activated.  相似文献   
63.
This article develops and tests the argument that leadership behavior in organizations can best be understood within a contingency technology-environment model. The major premise of this model is that one of the most influential intervening factors between organizational performance and leadership behavior is either the technology that the organization utilizes or the environment with which the organization interacts. Building upon this premise and the work of Kuhn (1970), four hypotheses are tested concerning the relationship between the effectiveness of natural science and social science departments in American universities using factor analysis. The data supports the conclusion that differential leadership styles are predictable in different scientific fields.  相似文献   
64.
Developmental dyscalculia is a specific learning disability that is described as a heterogeneous and persistent cognitive disorder. Given the need to detect and intervene as early as possible to minimise its effects, teachers’ knowledge about symptoms, characteristics and effective intervention strategies in dyscalculia is essential. Given the lack of research about this topic and measures to evaluate teachers’ knowledge, this study aims to present a literature-based measure to evaluate knowledge about developmental dyscalculia and to investigate the predictors of this type of knowledge. Data were collected from a sample of 175 primary school teachers. The measure presented adequate psychometric properties. Teachers’ personal characteristics such as age and gender did not predict their knowledge about dyscalculia. Being a Special Education teacher predicted a higher knowledge of intervention strategies in dyscalculia and having heard about dyscalculia predicted higher knowledge about not only intervention strategies but also dyscalculia characteristics. The data are discussed, and suggestions for further studies are presented.  相似文献   
65.
Academic work: Perceptions of senior academic administrators   总被引:1,自引:0,他引:1  
This article reports on selected findings of the first stage of a qualitative study of academic work in Australian universities. This stage examined the perceptions senior academic administrators from the humanities, sciences, social sciences and professional areas hold of the work roles of academics. The article presents their perceptions of ‘research’ and ‘scholarship’ and the link between the two, as well as the interrelationships between research, scholarship and teaching. The findings show a high level of consensus and coherence in the views presented. The article examines possible reasons for such a unanimity of perception and raises further questions for investigation.  相似文献   
66.
The present study compared Australian and Chinese teachers' causal attributions for student behavior. A total of 204 Australian teachers and 269 Chinese teachers rated the importance of four causes (ability, effort, family, teacher) of six student problem behaviors. Results showed that both groups of teachers attributed misbehaviors most to student effort and least to teacher factors. Chinese teachers emphasized family factors more while Australian teachers placed greater importance on ability. There was significant variation in attribution patterns for different types of problems, with effort attribution being equally and strongly emphasized across cultural contexts and behavior types. The results are interpreted in the light of how individualistic and collectivistic values influence teacher thinking, and implications for school‐based interventions for behavior problems are discussed.  相似文献   
67.
The issue of implementing large-scale reforms has played an important role both in the past as well as in current debates on structural changes and quality measures in education. When putting reforms into practice, individual schools and their leaders, who take a key role in reform processes, are focused. In the context of a comprehensive school reform in Berlin, this contribution presents an implementation of the Stages of Concern Questionnaire (SoCQ, Hall and Hord 2011), which intends to assess the degree of participants’ engagement with innovations in a phased respectively stepwise approach. Recently, the SoCQ questionnaire has been used to build different profiles or types of engagement in reform. Based on N?=?196 school leaders, latent profile analyses thus served to identify five types of profiles. Altogether, they indicate that the majority of school leaders are ready to implement the reform and contribute to its optimization. A rather small group remained skeptical with regard to the school reform. With respect to individual leadership characteristics, differences in profile composition could be found for gender, school type, and professional experience.  相似文献   
68.
This study examines the relationship between characteristics of academic areas and students' evaluation of instruction. Based on Biglan's model of subject matter and relevant studies of the role of instruction, a weak partial order model for classifying academic fields and predicting their relative ranking on instructional evaluation was tested. The findings of the study support the weak partial order model for all three criteria of instructional evaluation that are used in this research. Moreover, the major discriminant facet in this study is the knowledge base of the academic program (i.e., hard versus soft sciences). Based on the results of this research, an adapted model for understanding the role of academic areas in predicting instructional evaluation is proposed. The implications of this study are discussed and elaborated.  相似文献   
69.
70.
This research examines whether parental homework involvement mediates the relationship between family background and educational outcomes such as academic achievement and academic self-concept. Data from two studies in which grade 8 students (N = 1274 and N = 1911) described their parents’ involvement in the homework process were reanalyzed via structural equation modeling. Perceived parental homework interference and perceived homework-related conflict were negatively related to students’ academic development, whereas perceived parental support and perceived parental competence to help with homework were positively related to academic outcomes. Although there were small associations between some aspects of parental homework involvement and family background variables, parental homework involvement did not mediate the relationship between family background and educational outcomes. Findings highlight the need for differentiated conceptualizations of parental homework involvement as well as detailed analyses of the processes underlying the association between family background and educational outcomes.  相似文献   
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