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This study addresses the communication apprehension of the non‐native English speaker in the U.S. Previous studies which have examined the implications of communication apprehension (CA) for bilingual, non‐native communicators have generated results which indicate that trait‐like CA is consistent across first and second language‐speaking situations. However, none of these studies have probed the cause of the cross‐linguistic consistency of CA. This research is designed to provide a scientific explanation for the etiology of CA by applying the communibiological paradigm to CA theory and research. By selecting the situational constraints of international students, this study tests a theory based on proposition 4 of the communibiological paradigm (Beatty & McCroskey w/Valencic, 2001, p. 128): “Environment or ‘situation’ has only a negligible effect on interpersonal behavior.” The results of this study replicate the strong relationship previously observed between CA in a first language and CA in a second language. It also found that the genetic markers employed (Eysenck's Big 3 temperament variables) predicted first and second language CA approximately equally. The results indicate that, although both first and second languages are learned, the CA associated with them most likely is not. 相似文献
84.
Sae Yeol Yoon Jee Kyung Suh Soonhye Park 《International Journal of Science Education》2013,35(16):2666-2693
Korean students have shown relatively little interest and confidence in learning science, despite being ranked in the top percentile in international evaluations of academic achievement in science such as the Trends in International Mathematics and Science Study. Although research indicates a positive relationship between student perceptions of science and their science learning, this area has not been sufficiently explored in Korea. Particularly, even though both students' perceptions of scientific practice and their understanding of the nature of science (NOS) are influenced by their science learning experiences at schools, little research examines how this perception, understanding, and experience are related to one another. This study aimed to uncover Korean students' perceptions of school scientific practice through exploring their drawings, writings, and responses to questionnaires. Participants were 500 Korean students in 3rd, 7th, and 10th grades who were asked to complete an open-ended questionnaire. The results indicated that Korean students typically viewed school scientific practices as experimental activities or listening to lecture; and that most participants held an insufficient understanding of the NOS. Overall, no significant relationship emerged between students' perceptions of school scientific practice and their understanding of the NOS. Our findings highlight the need to help both teachers and students understand the potential breadth of school scientific practices, beyond simple ‘activity mania.’ This study also suggests that teachers must balance implicit and explicit instructional approaches to teaching about the NOS through scientific practices in school science contexts. 相似文献
85.
According to the national survey of science education, science educators in the USA currently face many challenges such as lack of qualified secondary Earth and Space Science (ESS) teachers. Less qualified teachers may have difficulty teaching ESS because of a lack of conceptual understanding, which leads to diminished confidence in content knowledge. More importantly, teachers’ limited conceptual understanding of the core ideas automatically leads to a lack of pedagogical content knowledge. This mixed methods study aims to explore the ways in which current secondary schooling, especially the small numbers of highly qualified ESS teachers in the USA, might influence students’ learning of the discipline. To gain a better understanding of the current conditions of ESS education in secondary schools, in the first phase, we qualitatively examined a sample middle and high school ESS textbook to explore how the big ideas of ESS, particularly geological time, are represented. In the second phase, we quantitatively analyzed the participating college students’ conceptual understanding of geological time by comparing those who had said they had had secondary school ESS learning experience with those who did not. Additionally, college students’ perceptions on learning and teaching ESS are discussed. Findings from both the qualitative and quantitative phases indicate participating students’ ESS learning experience in their secondary schools seemed to have limited or little influence on their conceptual understandings of the discipline. We believe that these results reflect the current ESS education status, connected with the declining numbers of highly qualified ESS teachers in secondary schools. 相似文献
86.
Word sense disambiguation (WSD) is meant to assign the most appropriate sense to a polysemous word according to its context. We present a method for automatic WSD using only two resources: a raw text corpus and a machine-readable dictionary (MRD). The system learns the similarity matrix between word pairs from the unlabeled corpus, and it uses the vector representations of sense definitions from MRD, which are derived based on the similarity matrix. In order to disambiguate all occurrences of polysemous words in a sentence, the system separately constructs the acyclic weighted digraph (AWD) for every occurrence of polysemous words in a sentence. The AWD is structured based on consideration of the senses of context words which occur with a target word in a sentence. After building the AWD per each polysemous word, we can search the optimal path of the AWD using the Viterbi algorithm. We assign the most appropriate sense to the target word in sentences with the sense on the optimal path in the AWD. By experiments, our system shows 76.4% accuracy for the semantically ambiguous Korean words. 相似文献
87.
An emulsion system was simulated under simple shear rates to analyze its rheological
characteristics using a hierarchical multi-scale approach. The molecular dynamics (MD) simulation
was used to describe the interface of droplets in an emulsion. The equations derived from the MD
simulation relative to interfacial tension, temperature, and surfactant concentration were applied
as input parameters within lattice Boltzmann method (LBM) calculations. In the LBM simulation, we
calculated the relative viscosity of an emulsion under a simple shear rate along with changes in
temperature, shear rate, and surfactant concentration. The equations from the MD simulation showed
that the interfacial tension of the droplets tended to decrease with an increase in temperature and
surfactant concentration. The relative viscosity from the LBM simulation decreased with an increase
in temperature. The shear thinning phenomena explaining the inverse proportion between shear rate
and viscosity were observed. An increase in the surfactant concentration caused an increase in the
relative viscosity for a decane-in-water emulsion, because the increased deformation caused by the
decreased interfacial tension significantly influenced the wall shear stress. 相似文献
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The purpose of this study was to investigate the relationship of students’ understanding of science knowledge, attitude and decision making on socio-scientific issues (SSI), especially on the issues of nuclear energy in Korea. SSI-focused instructions were developed to encourage students to understand and reflect on knowledge, attitude and decision making on nuclear energy in the current society. Eighty-nine students attended the instruction and participated in pre and post questionnaires to understand their understandings of nuclear energy. In this study, science knowledge was categorized into content and contextual knowledge, attitude consisted of images, safety, risk, potential, benefits and future roles, and decision making section included preference and alternative about lifetime extension of nuclear power plant. The results of questionnaires were analyzed by correlation, cross-tabulation and regression. As a result, while students’ understandings of science knowledge were significantly improved throughout the instruction, they maintained similar attitude and decision making on the issue. Regarding the relationship of the three domains, attitude showed some degree of connection to decision making whereas science knowledge did not show a significant relationship to decision making. This finding challenges SSI teaching in content-based science curriculum and classroom. Reflection and implications on the way of teaching SSI in the classroom were discussed further in this paper. 相似文献
90.
Private organizations and public sector regarding child welfare services have been two main actors in improving the quality of children ’s lives. In this paper, the author examines two cases of childre... 相似文献