排序方式： 共有62条查询结果，搜索用时 15 毫秒
31.
Dong-il Kim Hye-jung Koh Su-yeon Jo JeeEun Karin Nam Myeung-chan Kim 《Asia Pacific Education Review》2014,15(3):409-416
Educational psychology has seen rapid growth as an academic discipline in recent years. The current study reviewed research articles published in Asia Pacific Education Review (APER), a journal that has been gaining greater international recognition, to reveal recent trends in educational psychology research in Asia Pacific. Specifically, the study reviewed general (country, research methods and academic subject) and topical trends among 84 articles published in APER from 2005 to 2013. Findings of the study revealed that studies on diverse age groups were conducted in various countries. Although quantitative research greatly outnumbered qualitative research, qualitative research appeared to be increasingly accepted. Topics from special education and counseling were actively studied, with the greatest focus on learner characteristics highlighting individual differences. Outlined research trends and related discussions in this study may be useful for educational psychology researchers in East Asia. 相似文献
32.
We experimentally investigate the effects of high electric field on living cells inside a charged droplet under electrophoretic actuation. When an aqueous droplet suspended in a dielectric liquid contacts with electrified electrode, the droplet acquires charge. This charged droplet undergoes electrophoretic motion under strong electric field (1–3 kV/cm), which can be used as a droplet manipulation method in biomicrofluidic applications. However, because strong electric field and use of dielectric oil can be a harmful environment for living cells, the biological feasibilities have been tested. Trypan blue test and cell growth test have been performed to check the viability and proliferation of cells in a droplet under various electric field strengths and actuation times. We have not observed any noticeable influence of electric field and silicone oil on the viability and proliferation of cells, which indicates that electrophoresis could be safely used as a manipulation method for a droplet containing living biological system. 相似文献
33.
Kim Nam Ju Vicentini Cristiane Rocha Belland Brian R. 《International Journal of Science and Mathematics Education》2022,20(2):215-236
International Journal of Science and Mathematics Education - Success in problem-based learning requires both strong information literacy to search for, evaluate, and use information effectively,... 相似文献
34.
This study presents a method for density-based separation of monodisperse encapsulated cells using a standing surface acoustic wave (SSAW) in a microchannel. Even though monodisperse polymer beads can be generated by the state-of-the-art technology in microfluidics, the quantity of encapsulated cells cannot be controlled precisely. In the present study, mono-disperse alginate beads in a laminar flow can be separated based on their density using acoustophoresis. A mixture of beads of equal sizes but dissimilar densities was hydrodynamically focused at the entrance and then actively driven toward the sidewalls by a SSAW. The lateral displacement of a bead is proportional to the density of the bead, i.e., the number of encapsulated cells in an alginate bead. Under optimized conditions, the recovery rate of a target bead group (large-cell-quantity alginate beads) reached up to 97% at a rate of 2300 beads per minute. A cell viability test also confirmed that the encapsulated cells were hardly damaged by the acoustic force. Moreover, cell-encapsulating beads that were cultured for 1 day were separated in a similar manner. In conclusion, this study demonstrated that a SSAW can successfully separate monodisperse particles by their density. With the present technique for separating cell-encapsulating beads, the current cell engineering technology can be significantly advanced. 相似文献
35.
Yun Suk Huh Chang-Moon Jeong Ho Nam Chang Sang Yup Lee Won Hi Hong Tae Jung Park 《Biomicrofluidics》2010,4(1)
A protein separation technology using the microfluidic device was developed for the more rapid and effective analysis of target protein. This microfluidic separation system was carried out using the aqueous two-phase system (ATPS) and the ionic liquid two-phase system (ILTPS) for purification method of the protein sample, and the three-flow desalting system was used for the removal of salts from the sucrose-rich sample. Partitioning of the protein sample was observed in ATPS or ILTPS with the various pHs. The microdialysis system was applied to remove small molecules, such as sucrose and salts in the microfluidic channel with the different flow rates of buffer phase. A complex purification method, which combines microdialysis and ATPS or ILTPS, was carried out for the effective purification of bacteriorhodopsin (BR) from the purple membrane of Halobacterium salinarium, which was then analyzed by sodium dodecyl sulfatepolyacrylamide gel electrophoresis and matrix-assisted laser desorption∕ionization time-of-flight. Furthermore, we were able to make a stable three-phase flow controlling the flow rate in the microfluidic channel. Our complex purification methods were successful in purifying and recovering the BR to its required value. 相似文献
36.
南宗镇 《陕西师范大学学报(哲学社会科学版)》2000,29(2):123-129
唐代短篇人物传发展的成因,一是作传意识的强化,对史传的记录性与鉴戒性、寓言的讽刺性、古文的功利性认识进一步明确.二是文体规范与记述技法日益成熟,杂传的历史传统、部分史传的文艺性、墓道文的记述规范、传奇的创作技巧与经验、古文运动所造成的散文体的复兴奠立了基础.三是社会环境形成,史传的官撰与修史的中止等引起文入学士作传的欲望. 相似文献
37.
Hyung Nam Kim 《Interactive Learning Environments》2013,21(6):533-546
It is often observed that most international students are less likely to express their opinions in class. The lack of communicative engagement has negative impacts on students' academic performance. The objective of this article was to explore a range of possible explanations for international students' lack of engagement in class discussions and to seek a way to model how an e-tool could be applied to make international students more comfortable communicating. The present study viewed that those students' communication problems are induced by the following multiple factors: a sense of belonging to a minority, cultural difference, and communication apprehension. Blogs were thus suggested to enhance those students' communication contexts. An ideal model of blogging interactions between students and teachers was theoretically proposed. 相似文献
38.
Sung Youl Park Min‐Woo Nam Seung‐Bong Cha 《British journal of educational technology : journal of the Council for Educational Technology》2012,43(4):592-605
As many Korean universities have recommended the implementation of mobile learning (m‐learning) for various reasons, the number of such tertiary learning opportunities has steadily grown. However, little research has investigated the factors affecting university students' adoption and use of m‐learning. A sample of 288 Konkuk university students participated in the research. The process by which students adopt m‐learning was explained using structural equation modeling technique and the Linear Structural Relationship (LISREL) program. The general structural model based on the technology acceptance model included m‐learning self‐efficacy, relevance for students' major (MR), system accessibility, subjective norm (SN), perceived usefulness, perceived ease of use, attitude (AT), and behavioral intention to use m‐learning. The study results confirmed the acceptability of the model to explain students' acceptance of m‐learning. M‐learning AT was the most important construct in explaining the causal process in the model, followed by students' MR and SN. 相似文献
39.
This empirical study examines the effect of the Freedom of Information legislation on press freedom by analyzing cross-sectional data at the national level of aggregate indicators across 191 countries in 2010. The prediction by two-stage least square regression found that the impact of the legislation on press freedom is determined by control of corruption, the type of political regime (democratic or authoritarian regime), and the level of national economy. For recent adopters of the legislation, it could be no more than a legislative luxury. As the legislative effect on press freedom is mostly limited to less corrupt, advanced industrial democracies, the workings of the legislation require political and economic prerequisites. 相似文献
40.
By analyzing the Citizenship Involvement Democracy survey conducted on American citizens, this paper investigates categorical and demographic disparities between online and offline political participants and examines the two-sided effects (reinforcing and mobilizing) of the internet on political participation. The analysis presents three main findings. First, those who participate in online political activity do not differ categorically from those who conduct their political activity offline. Second, cross-group differences in how actively individuals participate in political activity make little distinction between offline and online modes. There is a trade-off between the generational gap in online political activity and the racial gap in offline political activity, but the gap in political participation between the socioeconomically advantaged and their counterparts appears in both online and offline political activities. Finally, the internet plays a dual role in mobilizing political participation by people not normally politically involved, as well as reinforcing existing offline participation. 相似文献