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51.
We have developed a coaxial flow focusing geometry that can be fabricated using soft lithography in poly(dimethylsiloxane) (PDMS). Like coaxial flow focusing in glass capillary microfluidics, our geometry can form double emulsions in channels with uniform wettability and of a size much smaller than the channel dimensions. However, In contrast to glass capillary coaxial flow focusing, our geometry can be fabricated using lithographic techniques, allowing it to be integrated as the drop making unit in parallel drop maker arrays. Our geometry enables scalable formation of emulsions down 7 μm in diameter, in large channels that are robust against fouling and clogging. 相似文献
52.
Tran D. Keys AnneMarie M. ConleyGreg J. Duncan Thurston Domina 《Contemporary educational psychology》2012
This study examines the association between personal goal orientations and mathematics achievement within the trichotomous goal framework. Participants comprised approximately 2000 seventh and eighth grade White, Hispanic, and Vietnamese students in a low-income urban school district in California. Regression analysis with classroom fixed effects minimized biases arising from non-random assignment of teachers and students to schools and classrooms. While all three achievement goal orientations were correlated with mathematics achievement, only a mastery goal orientation consistently predicted achievement when a full set of prior achievement and demographic controls were included. Performance-approach and performance-avoidance goal orientations did not predict achievement in the full model. 相似文献
53.
This paper is concerned with Lotka–Volterra models formulated using stochastic differential equations with regime switching represented by a continuous-time Markov chain. Different from the existing literature, the Markov chain is hidden and can only be observed in a Gaussian white noise in our work. For such partially observed problems, we use a Wonham filter to estimate the Markov chain from the observable evolution of the given process, and convert the original system to a completely observable one. We then establish the regularity, positivity, stochastic boundedness, and sample path continuity of the solution. Moreover, stochastic permanence and extinction using feedback controls are investigated. Numerical experiments are conducted to validate the theoretical findings and demonstrate how feedback controls perform in practice. 相似文献
54.
Martin Ebon Lawrence C. Soley John S. Nichols Olive Renier Vladimir Rubinstein Tran Van Dinh 《Communication Booknotes Quarterly》2013,44(5-6):44-45
THE SOVIET PROPAGANDA MACHINE by Martin Ebon (New York: McGraw-Hill, 1987—$22.95) CLANDESTINE RADIO BROADCASTING: A STUDY OF REVOLUTIONARY AND COUNTERREVOLUTIONARY ELECTRONIC COMMUNICATION by Lawrence C. Soley and John S. Nichols (New York: Praeger, 1987—$47.95) ASSIGNED TO LISTEN: THE EVESHAM EXPERIENCE, 1939–43 by Olive Renier and Vladimir Rubinstein (London: BBC External Services, 1986—L3.95, paper, plus 25% more to cover postage and packing outside of the U.K.) INDEPENDENCE, LIBERATION, REVOLUTION: AN APPROACH TO THE UNDERSTANDING OF THE THIRD WORLD by Tran Van Dinh (Norwood, NJ: Ablex, 1987—$37.50) FOLLOWING THE FOOTPRINTS: PROTECTING FILM AND TV RIGHTS IN THE WORLD SATELLITE MARKETPLACE edited by Charles Firestone and Daniel Brenner (Communications Law Program, UCLA School of Law, University of California, Los Angeles 90024—price not given, paper) 相似文献
55.
Eileen R. C. Parsons Lynn Uyen Tran Crystall Travis Gomillion 《International Journal of Science Education》2013,35(11):1469-1489
Achievement disparities among racial groups attest to the elusiveness of the ‘science for all’ goal, an emphasis of reform efforts in the USA. One popular approach to making science accessible to all is group work. The study investigated roles attained by five African American and six European‐American eighth graders working in small, racially mixed groups. What roles did the African‐American and European‐American students attain in the small, racially mixed science groups? Did race‐associated patterns of role attainment exist? If so, what was the nature of the patterns? Roles were derived and patterns examined via the qualitative and quantitative analyses of videotaped group interactions. The findings indicated that European‐Americans attained roles more frequently than their African‐American counterparts of comparable abilities and whiteness operated in the small groups. The findings imply racial inequities in group work and the need for teachers to consider race when employing it. 相似文献
56.
Narrating Lives,Narrating Faith: “Organic Hybridity” for Contemporary Christian Religious Education 总被引：1，自引：1，他引：0
Mai-Anh Le Tran 《Religious education (Chicago, Ill.)》2013,108(2):188-203
This article proposes that Christian Religious Education (CRE) today requires the practice of “organic hybridity” in fluid and shifting “diasporic spaces,” the prerequisite for which is the recognition that “hybrid subjectivities” is characteristic of our current postmodern, postcolonial, transnational, globalized world. Toward this aim, CRE must strive to understand how contemporary hybrid subjects negotiate identities and faith in the way they narrate situationally, improvisationally, and organically about the inter-activity between human and Divine for everyday living. 相似文献
57.
Anh Tran 《Health information and libraries journal》2017,34(3):258-262
Public Health England plays a vital role in ensuring the health of the nation. The Knowledge and Library Service (KLS) is a key part of the organisation's evidence supply chain. KLS staff handle over 200 requests for literature searches per annum, and this number is increasing exponentially year on year. Searches are often complex and require specialist public health knowledge to complete effectively. Library staff who are new to the area of public health require support and training. In this article, Anh Tran, Knowledge and Evidence Specialist for Public Health England, discusses a peer supported literature search training course that has been developed in‐house for the benefit of new library staff, and to increase the Knowledge and Library Service's literature searching capacity at Public Health England. H. S. 相似文献
58.
Ly Thi Tran Tran Le Huu Nghia Cam Khuong Truc Thi Thanh Le 《Teaching in Higher Education》2019,24(6):755-771
Language and learning advisors (LLAs) play a vital role in supporting the academic development of a fast-growing population of international students. This paper tackles the professional development practices for LLAs and barriers to their professional development. Using Bourdieu’s concepts of field and habitus, the paper addresses the mutual interactions between the work environment and LLAs’ thinking and actions regarding providing language and learning advice to international students. The analysis of 44 semi-structured interviews with LLAs from 18 institutions shows that there was a scarcity of targeted professional development opportunities for LLAs to improve their expertise directly related to international students and internationalisation of education. Financial shortage, time constraints, casualisation conditions, managerial issues, academic to professional employment re-classification for LLAs and the ongoing marginalisation of LLAs have created unfavourable contexts for LLAs’ professional development. The paper points out the critical need to create better work conditions for LLAs, to ensure more investment in creating targeted opportunities for LLAs’ professional development and to provide more resources and attention to support their enactment of agency and development of professional capacities. 相似文献
59.
Tuan D. Tran Laura C. Adducci Liza D. DeBartolo Beth A. Bower Eugene R. Delay 《Learning & behavior》1994,22(4):421-426
Cross-modal transfer of learning between black/white and rough/smooth discrimination tasks was studied in a two-choice maze procedure in which the stimuli for both discriminations were located on the floor of the maze. Rats were trained initially with cues of one modality and then given transfer training with cues of the second modality. The amount of transfer produced by two criteria of learning, 9 correct responses in 10 trials and 18 correct responses in 20 trials, was also studied. Bidirectional cross-modal transfer of learning was demonstrated more clearly with the more stringent learning criteria. These positive transfer effects appeared primarily to be the result of general transfer processes. 相似文献
60.
Le Huu Nghia Tran 《Journal of Education & Work》2017,30(8):854-867
This article reports a study that investigated student engagement and inhibitors of their engagement with developing employability skills via extra-curricular activities in Vietnamese universities. Content analysis of 18 interviews with students and statistical analysis of 423 students’ responses to a paper-based survey showed that despite a variety of extra-curricular activities being frequently organised, students engaged in these activities just above a moderate level. The analysis revealed that students with different motivations as well as students from different university types, disciplines, and university years engaged differently with developing employability skills via this channel. Five inhibitors of their engagement were identified, including students’ working part-time, a lack of information about extra-curricular activities, students’ beliefs about participating bringing no benefits, competition with curriculum-based activities, and unprofessional organisation of these activities. The article discusses ways to improve student engagement with developing employability skills via extra-curricular activities. 相似文献