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81.
A precise micro-location compliant stage with elastics-supported system is enmployed for investigations.The general motion of stage supported by elastic structure is described.The analyses of forward displecement and inverse displacement of stage are formulated.The study of input-output behavior of compliant mechanisms actually belongs to a stress-strain field problem.By using finite element analysis.the compliance coefficients of the stage supported by ring are calculated.Finally,a case is inverstigated to exemplity these formulae. 相似文献
82.
Gwo-Jen Hwang Chiu-Lin Lai Jyh-Chong Liang Hui-Chun Chu Chin-Chung Tsai 《Educational technology research and development : ETR & D》2018,66(1):75-93
In this study, a one-year program was conducted to investigate the relationships between students’ perceptions of mobile learning and their tendencies of peer interaction and higher-order thinking in issue-based mobile learning activities. To achieve the research objective, a survey consisting of eight scales, namely, usability, continuity, adaptive content, collaboration, communication, problem-solving, critical thinking and creativity, was developed. A total of 658 students from 38 high schools in Taiwan filled in the questionnaire after experiencing issue-based mobile learning activities. From the exploratory and confirmatory factor analyses, it was found that the questionnaire had high reliability and validity. The structural equation model further revealed that the provision of adaptive content in the mobile learning had positive impacts on the students’ tendency to interact with peers (i.e., collaboration and communication), which further affected their tendency to engage in higher-order thinking (i.e., problem-solving, critical thinking, and creativity). The findings of this study provide a good reference for researchers and school teachers who intend to promote mobile learning in school settings. 相似文献
83.
This paper reports research on the effects of variations in injection velocity and permeability on the heat transfer and flow
through a highly porous medium between two horizontal parallel plates situated at constant distance with constant suction
by the upper plate. Due to this type of variation in injection velocity and in permeability the flow becomes three dimensional.
The governing equations are solved by adopting complex variable notations to obtain the expressions for the velocity and temperature
field. The skin-friction along the main flow direction and rate of heat transfer are discussed with the help of graphs. 相似文献
84.
1 Introduction SMP (symmetricmulti processing)andMPP (mas sivelyparallelprocessing)arethetwotypesofstruc tureofparallelcomputing . Symmetricmulti processingsystemshavemultipleCPUsattachedtothesamebusandsharingRAM .Massivelyparallelprocessingisthecooperated pro cessingofaprogrambymultipleprocessorsthatworkondifferentpartsoftheprogram ,witheachprocessorusingitsownoperatingsystemandmemory .ThechoicebetweenSMPandMPPdependsonthenatureoftheproblembeingsolved .Iftheproblemcanbeeasilypartit… 相似文献
85.
Woei Hung 《Educational technology research and development : ETR & D》2011,59(4):529-552
The success of an intervention depends not only upon its theoretical soundness, but also on proper implementation that reflects
the guidelines derived from its theoretical conception. Debates surrounding the effectiveness of problem-based learning (PBL)
have focused on its theoretical conception and students’ learning outcomes, but implementation is seemingly absent from the
picture. This paper attempts to describe what research evidence is needed to fill in this missing information and provide
a clearer picture of PBL. The author examines current PBL implementation practices and identifies potentially confounding
variables that may play a role in inconsistent or conflicting research results in PBL. For example, various models of PBL
have been developed and implemented to afford the specific instructional needs of the institution or learner population. These
PBL models are in fact quite different in terms of the nature of problem solving and the degrees of self-directed learning,
which theoretically, should result in different types of learning outcomes. Without distinguishing the models used, the results
of comparative PBL research could have been confounded. Furthermore, human factors are another set of confounding variables
that could influence the students’ learning processes and consequently affect PBL implementations and research results. To
remedy these problems and reach PBL’s full potential, as well as obtain a more accurate picture of PBL as an instructional
method and its effects on students’ learning, some fundamental changes are needed. 相似文献
86.
Akindele Matthew Ige 《Early Childhood Education Journal》2011,39(2):161-167
Early childhood is a critical period of rapid physical, cognitive, and psycho-social development of a child. The quality of
care and education which a child receives at this crucial age will determine to a great extent the level of his/her physical
and cognitive development in the future. In Nigeria, Early Childhood Care, Development and Education (ECCDE) is an aspect
of Universal Basic Education which was introduced in 1999 to increase the access of children to basic education and improve
the state of education in the country. While all hands are on deck to ensure successful implementation and achievement of
the objectives of the scheme, it is unfortunate that ECCDE is facing some challenges thus making it unrecognized in Nigeria.
This paper examines the challenges of early childhood education in Nigeria. To improve the situation, the following measures
are recommended: establishment of more public crèche, kindergarten, and nursery schools by the government; enforcement of
the use of mother tongue in the teaching of children; training more personnel in the field of early childhood education in
tertiary institutions; and introducing unified curriculum as well as providing more infrastructures. 相似文献
87.
Lynne Cherry 《Journal of Science Education and Technology》2011,20(2):208-213
Lynne Cherry Brandwein Lecture March 2010 National Science Teachers Association (NSTA) Conference, Philadelphia, PA. Young
Voices on Climate Change: Inspired and Empowered Youth Tackle Climate Science and Find Climate Solutions. As a child, Lynne
Cherry was profoundly connected to the natural world and a special place. She watched the destruction of her world. Now, through
her Young Voices on Climate Change project, she is trying to give teachers and young people the tools to prevent planetary
meltdown on a greater scale. Global climate change is upon us and the need for education and action is immediate. Outreach,
visual storytelling, and scientific understanding are especially necessary in light of the recent polls that show that the
public is becoming more confused and less concerned about climate change. Cherry’s climate book, co-authored with photojournalist
Gary Braasch, and her Young Voices on Climate Change films feature climate solutions. They’re about win–win—save the environment,
protect human health, reduce global warming gases, demonstrate youth making a difference with practical tools, motivate engagement
in climate science, take pride in increased science literacy, reach young people through their hearts as well as their minds,
and save money. Although young people can help their parents, peers and communities understand climate science, they can also
show them that reducing CO2 is in their economic interest, and spur them to take action. School carbon reduction initiatives are spilling over into communities
yielding measurable results in both global warming gas reductions and significant monetary savings. 相似文献
88.
Part II of “Reclaiming Kindergarten” continues the discussion related to responding to the crisis in today’s kindergarten.
In Part II, two policy questions are posed, the answers to which seek to respond to this continuing crisis. The questions
center on issues related to engaging families in kindergarten and the need to consider a new early childhood paradigm where
kindergarten is part of a continuous and seamless educational experience spanning prekindergarten through third grade. As
in Part I, examples of classroom practice are used to illustrate the effective implementation of these principles in a kindergarten
classroom. 相似文献
89.
Michael R. Olneck 《Asia Pacific Education Review》2011,12(4):675-690
Multicultural policy in South Korea faces variants of challenges endemic to multiculturalism. These challenges are “dilemmas
of difference,” “variable terms of inclusion,” and “legitimacy.” In Korea, these challenges arise in a setting in which ethnic
diversity is of relatively recent origin, an ideology of ethnic homogeneity is prevalent, and official multicultural policy
is limited in its reach to those who are designated as “multicultural families,” that is families in which one spouse is Korean
and the other an immigrant, usually the wife, and their offspring. The exclusion of migrant workers and their families from
Korea’s multicultural framework poses a core contradiction in Korean multicultural policies. This contradiction must be resolved
if multiculturalism in education and other spheres is to promote equality and provide a foundation for national integration
on terms that are equitable to the diverse constituents of Korean society. Inevitably, this will require a redefinition of
what it means to “be Korean.” Even if multicultural policies fall short in their immediate effects on those toward whom they
are directed, multiculturalism represents a significant shift in the discourse of Korean identity and will be terrain on which
the status of diverse groups in Korea will be contested. 相似文献
90.
本研究采用Sharma等人编制的<教师融合教育自我效能感量表>以及<融合教育忧虑量表>对上海市110名特殊教育学校教师以及213名普通学校教师进行了调查,结果发现:两类教师对开展融合教育具有一定水平的自我效能感;特殊教育学校教师的自我效能感要高于普通学校教师;普通学校教师在开展融合教学以及与他人合作方面的自我效能感普遍低于特殊教育学校教师,但在行为管理方面,则与特殊教育学校教师没有差异;两类教师对开展融合教育抱有中等水平的忧虑,且融合教育自我效能感与其忧虑水平存在显著负相关,教师对开展残疾学生教学的自信心水平越高,则对融合教育的忧虑越少.教师融合教育忧虑程度对自我效能感的方差贡献率超过50%以上. 相似文献