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41.
Recent research has indicated that there are long‐term consequences of early media exposure. This study examined the amount, content and context of television exposure across the infancy period in the USA. Parents of 308 infants aged 6–18 months completed questionnaires detailing parental attitudes regarding their children’s television use and 24‐hour television diaries to provide an accurate measurement of household television usage. Television exposure during infancy varied as a function of infant age, sibling status, socio‐economic status and parental attitudes toward television. Regression analyses indicated that parental attitudes were not associated with the amount of television exposure, but were associated with the content of television exposure. These findings indicate that television exposure changes rapidly across infancy and is associated with parental attitudes.  相似文献   
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Digital media and open educational resources (OER) are said to redraw the boundaries between learners and teachers, by weakening the centralization of expertise and the distribution of subject-matter authority. This paper presents the findings of an ethnographic study of how the use of OER mediates the relations between self-directed learners and facilitators in two online open courses offered at a non-formal educational organization. Findings highlight the different role played by OER in mediating the relations between learners and facilitators in the two courses. In one course, early-stage learners encountered difficulties in repurposing OER and needed help to move to a more advanced stage of conceptual understanding. In the other course, well-read participants used OER to develop an affinity space in which the facilitator was a fellow learner. The findings suggest that OER are better viewed as artifacts-in-interaction rather than resources to be delivered as they are to learners. Although facilitators at P2PU do not play the role of academic teachers, it is argued that the influence of OER on the facilitator role can have implications for that of the academic teachers as well.  相似文献   
44.
The need to preserve cultural heritage on paper requires the setting up of methods and treatments that can be applied to original documents. The cellulose main degradation processes are hydrolysis and oxidation. Only the first one has been widely investigated. The Istituto Centrale per la Patologia del Libro (ICPL) focused its attention on oxidation phenomena and studied a particular class of reducing agents, namely the borane-amine complexes. During the investigation it was found that the borane tert-butylamine complex, besides being the most promising reducing agent, was also able to react with carboxylic functions. In the present study 1H and 13C NMR, Pulsed field gradient NMR spectroscopy as well as Raman spectroscopy were used as analytical tools to disclose the mechanism of the interaction between the borane tert-butylamine complex and the carboxylic functions. Given the complexity of the paper/environment interactions and the subsequent degradation phenomena, we worked on simplified models based on small carbohydrate molecules in order to reproduce the behavior of degraded paper after reductive restoration. Modified D-glucose and D-cellobiose were used in this first step in order to set up the analytical methods before approaching more complex systems such as microcrystalline cellulose and paper. Our results give the experimental evidence that borane tert-butylamine complex is also able to neutralize acidic functions. This finding has important perspectives in paper restoration.  相似文献   
45.
Using the Social Cognitive Theory as a theoretical framework, this study evaluated a 4-month, individual cognitive-behavioral intervention program to decrease burnout and increase self-efficacy, engagement, and performance among university students. The main objective of the intervention was to decrease the anxiety the students coped with before exams in order to increase their beliefs of self-efficacy. Besides the study group intervened, two control groups were involved (i.e., a “stressed” control group and a “healthy” control group). All 3 groups filled out a questionnaire before the intervention and then again 6 months later (2 months after the intervention was completed). The results show that self-efficacy, engagement and performance increased in the intervened group when compared to both control groups. Regarding burnout, decreases were noted in both the intervened and stressed control groups but not in the healthy control group. The implications of the study are discussed, together with its limitations and suggestions for future research.  相似文献   
46.
In the wake of recent school shootings, fear over violence in schools has prompted increased requests for psychologists, educators, and law enforcement professionals to assist in preventing future school violence incidents. We attempt to lay a foundation for developing effective assessment and prevention approaches by first distinguishing planned school‐based attacks from other forms of school and youth violence. We then review the three assessment approaches that have been advocated and used in some jurisdictions (profiling, guided professional judgment, automated decision‐making) and demonstrate why they are inappropriate—and potentially harmful—in preventing planned school‐based attacks. We then describe the contours of the threat assessment approach, developed by the U.S. Secret Service to prevent assassinations, and examine its utility for responding to communications or behaviors of concern that students may present in school settings. © 2001 John Wiley & Sons, Inc.  相似文献   
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This study investigated the relationships between completing the high school portion of a college- and career-preparatory program of study and high school achievement outcomes in a large urban district in the West. Programs of study are secondary-to-postsecondary educational programs mandated by the federal legislation (Perkins IV) governing career and technical education (CTE) in the United States. At graduation, 49.5% of students in the sample who began a program of study had completed their programs. Using multiple regression models, we compared graduates who completed a program of study (hereafter POS completers) to graduates who completed a number of CTE courses in a specific occupational area (CTE concentrators), and to graduates who may have taken a CTE course or two during high school but were neither POS completers nor CTE concentrators (All Others). POS completers were more likely to (a) have a higher overall GPA, (b) have a higher CTE GPA, and (c) earn more STEM (science, technology, engineering, and mathematics) credits than All Other students. Compared with CTE concentrators, POS completers were more likely to (a) have a higher overall GPA and (b) earn more STEM credits. Qualitative data describe contextual elements of programs of study as offered in West District that could explain these results. Study results suggest that districts should consider implementing career-themed programs such as programs of study that enhance their existing college- and career-readiness initiatives. We also call for further study of the postsecondary and labor market outcomes associated with programs of study in order to generate a clearer picture of their potential to increase academic and technical achievement and promote successful student transitions to higher education and the workplace.  相似文献   
48.
This study examined differences between Ecuadorian and Euro-American college students in the perceived acceptability of lies. Six different lie domains were examined: flattery, impression management, conflict avoidance, enhancement of others’ self-esteem, self-aggrandizement, and instrumental lies. Overall, Euro-Americans rated lies as more acceptable than Ecuadorians. In both cultures, lies motivated by a desire to benefit others were considered to be more acceptable than lies that primarily benefited the self. Additionally, lying to the outgroup was perceived as being more acceptable than lying to the ingroup. These results were interpreted in light of the findings that Ecuadorians scored higher on measures of uncertainty avoidance and power distance, whereas Euro-Americans scored higher on levels of independence. The implications of these findings for intercultural relations and future directions for research are discussed.  相似文献   
49.
AIMS: In January 2004, the Italian government passed new legislation designed to give people with disabilities access to online services. Starting from the new legislation requirements, the purpose of this study is to investigate whether Italian Local Health Authorities websites are accessible to users with different abilities. METHODS: One hundred and seventy websites were analysed evaluating their compliance to the World Wide Web Consortium (W3C) Priority 1 guidelines via a combination of appropriate accessibility testing methods. This review was carried out twice: the first time it took place between the end of 2003 and May-June 2004. The same survey was repeated again in December 2004, after the issuing of the draft of the Implementation Regulations for The Stanca Law in July 2004. In this second survey, all the websites analysed before were checked again to establish if some measures to make those sites accessible were taken. RESULTS: Seventy-six per cent of the analysed websites fail to satisfy the most basic W3C requirements, but Italian Local Health Authorities websites are likely to present significant improvements to access for some disabled user groups: the number of accessible websites increased consistently between the first and the second review. CONCLUSIONS: It seems that awareness of web accessibility issues is increasing among developers of health information websites because of law enforcement. Recommendations for future research and development are offered.  相似文献   
50.
The last 5 years have witnessed growing support amongst government institutions and educational foundations for applying continuous improvement research (CIR) in school settings. CIR responds to the challenge of implementing effective educational innovations at scale by working with practitioners in local contexts to understand “what works, for whom, and under what conditions.” CIR works to achieve system improvement through the use of plan–do–study–act (PDSA) cycles, which are multiple tests of small changes. This comparative case study of two urban school districts examined how innovation design teams took up PDSA in their work to improve high school student outcomes, and their perceptions of PDSA as an approach to innovation development, adaptation, and implementation. Findings revealed both possibilities and challenges for implementing PDSA. Nearly all participants reported the value in PDSA, and participants pointed to connections to previous experiences and PDSA training as helping to build capacity. However, we found mixed levels of enthusiasm for actually conducting PDSA cycles, and capacity constraints regarding time and data collection.  相似文献   
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