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91.
This paper reports the improvement of rectification effects in diffuser∕nozzle structures with viscoelastic fluids. Since rectification in a diffuser∕nozzle structure with Newtonian fluids is caused by inertial effects, micropumps based on this concept require a relatively high Reynolds numbers and high pumping frequencies. In applications with relatively low Reynolds numbers, anisotropic behavior can be achieved with viscoelastic effects. In our investigations, a solution of dilute polyethylene oxide was used as the viscoelastic fluid. A microfluidic device was fabricated in silicon using deep reactive ion etching. The microfluidic device consists of access ports for pressure measurement, and a series of ten diffuser∕nozzle structures. Measurements were carried out for diffuser∕nozzle structures with opening angles ranging from 15° to 60°. Flow visualization, pressure drop and diodicity of de-ionized water and the viscoelastic fluid were compared and discussed. The improvement of diodicity promises a simple pumping concept at low Reynolds numbers for lab-on-a-chip applications. 相似文献
92.
Laina Ho 《Children‘s Literature in Education》2000,31(4):259-271
This article investigates the possible role of children's literature in the education of adult learners of English. This three-year study on adult learners of English from the People's Republic of China shows that children's literature can be effective in teaching linguistic skills such as pronunciation practice and improving language acquisition. Using and reading children's literature is an initial step to developing literary competence, critical thinking, increasing knowledge, and multicultural understanding as well as exposing learners from developing countries to effective innovative educational methodology. Despite the limitations of children's literature—identification with child protagonists—it paves the way to developing literacy in adult literature. 相似文献
93.
We identify literature that argues the process of creating knowledge‐based system is often imbalanced. In most knowledge‐based systems, development is often technology‐driven instead of requirement‐driven. Therefore, we argue designers must recognize that evaluation is a critical link in the application of requirement‐driven development models because it provides the information that keeps the iterative developmental process on track. In this study we took a closer look at the decision‐making in the design of a complex performance system in a non‐profit organization. The purpose was to gain insights into the roles and functions of evaluation during the process of building a performance support system. This study adopted an exploratory case study as its inquiry method. Findings suggested that effective communication is as important a function to evaluation as is decision‐making, and that the implementation of evaluation seldom follows the textbook guidelines. That is, evaluation practice is a patchwork history of the designers' knowledge and experience. Further, neither complexity nor the informality of the evaluation protocols seems to influence the quality of decision‐making. 相似文献
94.
State testing programs regularly release previously administered test items to the public. We provide an open-source recipe for state, district, and school assessment coordinators to combine these items flexibly to produce scores linked to established state score scales. These would enable estimation of student score distributions and achievement levels. We discuss how educators can use resulting scores to estimate achievement distributions at the classroom and school level. We emphasize that any use of such tests should be tertiary, with no stakes for students, educators, and schools, particularly in the context of a crisis like the COVID-19 pandemic. These tests and their results should also be lower in priority than assessments of physical, mental, and social–emotional health, and lower in priority than classroom and district assessments that may already be in place. We encourage state testing programs to release all the ingredients for this recipe to support low-stakes, aggregate-level assessments. This is particularly urgent during a crisis where scores may be declining and gaps increasing at unknown rates. 相似文献
95.
An exploratory study on collaborative modes of professional development and learning for teachers of students with autism spectrum disorder (ASD) 下载免费PDF全文
Fuk Chuen Ho Cici Sze‐Ching Lam Sam Ka‐lam Sam Michael Arthur‐Kelly 《Support for Learning》2018,33(2):142-164
This study aims to deliver a school‐based mode of training for in‐service teachers of students with ASD in Hong Kong. The training is delivered following the phases of implementation science, namely, exploration, installation, and implementation. The project team used the theory of mind approach, which enables teachers to engage with students with ASD and to focus on recognizing and reacting to emotions. Participants in this study included four educators from a teacher education institution, three expert teachers, and 19 in‐service teacher trainees. The most salient responses came from trainees who were provided with the opportunity to apply learned skills in their own classrooms immediately and to share the knowledge and skills in dealing with students with ASD in the post‐conference meetings. 相似文献
96.
97.
Wai-Chung Ho 《Asia Pacific Journal of Education》2006,26(2):225-241
This study deals with the issue of incorporating values education in music education in Hong Kong's primary and secondary schools. It includes the development of the state's cultural and national identity since its handover from the United Kingdom to the People's Republic of China (PRC). Thirty primary and secondary school music teachers were interviewed in order to understand how notions of “musical values” and “non-musical values” have been addressed in the curriculum. In particular, this study focuses on music teachers' perspectives on teaching world music, traditional Chinese music, the PRC national anthem, and non-musical values. This paper questions the effectiveness of existing curricular and pedagogical attempts to encourage the students' musical experience and extra-musical education. It concludes that values education must have clear conceptions of “values”, “musical cultures”, and “national identity” in order to maintain unity amidst the intensifying plurality of ethnicities and cultures in Hong Kong. 相似文献
98.
Ho Wah Kam 《Asia Pacific Journal of Education》1988,9(2):59-62
The purpose of the Functional Objectives in Language Learning Project (FOLL) is two-fold:
? to identify what may be called “functional objectives” in language learning (in English, Chinese, Malay and Tamil) at three grade levels, viz. Primary 6 Normal (P6N), Secondary 4 Normal (S4N) and Secondary 4 Express (S4E), and
? to determine empirically how realistic or attainable these objectives are for pupils at each of the three grade levels. 相似文献
99.
100.
Fong Ho Kheong 《Asia Pacific Journal of Education》1987,8(2):32-44
Many students have found the learning of multiplication a difficult task. Without mastering multiplication facts, a student will always resort to fundamental strategies which may be undesirable in problem-solving. Many teachers and educators agree that learning basic facts in the four operations are the fundamental steps that precede learning harder facts. Referring to the aspect of computational errors, Knifong and Holton (1975) indicated that computational errors accounted for 49% of the total errors made by 35 students who sat for the Metropolitan. Achievement Test. Suydam (1975) and NCTM (1977) stressed the importance of basic facts even though calculators and lately computers have been introduced into the school curriculum. The purpose of this study was to investigate the methodology of teaching basic facts which would alleviate the problems of teaching these facts to low achievers of Mathematics. A review of studies on thinking strategies shows that very few were carried out in learning the thinking strategies, particularly in multiplication using low achievers as the target. The success of using thinking strategies to teach multiplication number facts to most students does not imply its success in teaching all students. One of the intentions of this study is to investigate what strategies are useful in helping the low achievers in learning mathematics. 相似文献