排序方式： 共有13条查询结果，搜索用时 359 毫秒
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Hamblin MN Hawkins AR Murray D Maynes D Lee ML Woolley AT Tolley HD 《Biomicrofluidics》2011,5(2):21103
Planar nanochannels are fabricated using sacrificial etching technology with sacrificial cores consisting of aluminum, chromium, and germanium, with heights ranging from 18 to 98 nm. Transient filling via capillary action is compared against the Washburn equation [E. W. Washburn, Phys. Rev. 17, 273 (1921)], showing experimental filling speeds significantly lower than classical continuum theory predicts. Departure from theory is expressed in terms of a varying dynamic contact angle, reaching values as high as 83° in channels with heights of 18 nm. The dynamic contact angle varies significantly from the macroscopic contact angle and increases with decreasing channel dimensions. 相似文献
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John M. Edwards IV Mark N. Hamblin Hernan V. Fuentes Bridget A. Peeni Milton L. Lee Adam T. Woolley Aaron R. Hawkins 《Biomicrofluidics》2007,1(1)
Electro-osmotic flow (EOF) pumps are attractive for fluid manipulation in microfluidic channels. Open channel EOF pumps can produce high pressures and flow rates, and are relatively easy to fabricate on-chip or integrate with other microfluidic or electrical components. An EOF pump design that is conducive to on-chip fabrication consists of multiple small channel arms feeding into a larger flow channel. We have fabricated this type of pump design using a thin film deposition process that avoids wafer bonding. We have evaluated pumps fabricated on both silicon and glass substrates. Consistent flow rate versus electric field were obtained. For the range of 40–400 V, flow rates of 0.19–2.30 μL∕min were measured. Theoretical calculations of pump efficiency were made, as well as calculations of the mechanical power generated by various pump shapes, to investigate design parameters that should improve future pumps. 相似文献
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This article discusses the use of a sentence completion instrument predicated on Lazarus' multimodal system. The instrument, entitled The Multimodal Sentence Completion Form for Chindren (MSCF-C), is designed to systematically assess client needs and assist in identifying intervention strategies. Administration procedures and profile development also are addressed. To assist the reader in understanding the strengths and limitations of the MSCF-C, a case study of a 12-year-old sixth-grade student is presented. Based on the verbatim responses of this student, a profile of client characteristics and plausible strategies was outlined. 相似文献
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Carolyn J. Hamblin 《Community College Journal of Research & Practice》2013,37(12):1182-1186
A survey of novice community college teachers in Arizona examined what learning experiences are available to help them learn to teach, and how valuable they consider those experiences to be in learning to teach. These activities can be organized into four general categories: reflective activities, classroom application, formal methods of learning teaching strategies, and college-based activities. Of these activities, new teachers value reflective activities the most, followed by classroom application, then formal methods of learning teaching strategies. College-based activities got the lowest ranking. These rankings raise two questions that warrant further professional exchange and research. First, are college-based professional development activities actually less valuable in promoting student success, or are they simply perceived that way by faculty members? Second, is there an intuitive process that new teachers use to learn to teach that relies more heavily on reflective and applied activities? 相似文献
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Douglas Hamblin 《Pastoral Care in Education》2013,31(4):3-5
Chris Watkins was a member of the first NAPCE executive in 1982, and has continued on that committee and on the London committee ever since. He was chair of NAPCE from 1992 to 1994, and is currently chair of the Publications Committee. He has been a maths teacher in a large secondary school, a teacher in charge of a unit for pupils whose effect on school was disruptive, and a trained school counsellor. He is now head of the academic group ‘Assessment, Guidance and Effective Learning’ at the University of London Institute of Education, where his current areas of work include school behaviour, mentoring, tutoring, personal–social education – all centrally linked to effective learning in classrooms and school. He is course tutor to the MA in Effective Learning and the MA in School Development, and is involved in consultancy to schools and training others in consultation. Current research projects include ‘The Violence-resilient School’ and ‘Learning about Learning’. 相似文献
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浅论计算机网络用语对现代汉语的影响及其规范 总被引：1，自引：0，他引：1
林纲 《徐州师范大学学报(哲学社会科学版)》2001,27(3):85-87
计算机网络用语是现代汉语新词的来源之一，本文试从三个方面对其进行探讨：1、我国计算机网络用语的现状。2、我国计算机网络用语的影响。3、我国计算机网络用语的规范。 相似文献