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为研究滚动轴承套圈硬车削加工的特性,设计并研制了一种硬车削加工轴承内圈外圆表面、滚道、端面及倒角的夹具,文章介绍了该夹具的工作原理和结构特点。 相似文献
2.
M. Armenteros Shu-Sheng Liaw M. J. Sánchez-Franco M. Fernández R. Arteaga Sánchez 《Education and Information Technologies》2017,22(3):841-872
The aim of our study is to improve the understanding of the different behavioral intentions of referees and assistant referees in different FIFA (International Federation of Association Football) confederations towards Multimedia Teaching Materials as learning tools. To achieve this goal, we carry out a survey of 214 elite referees and assistant referees and we propose a research model with the variables perceived usefulness, perceived ease of use, perceived enjoyment, perceived self-efficacy, multimedia instruction, previous experience with technology and self-paced learning. These variables were taken from previous educational technology research. Among these models we mainly take into account the Technology Acceptance Model, the Motivational Model and the Social Cognitive Theory. To assess the relationships between the constructs, we develop an analysis based on a Structural Equation Modeling (SEM), specifically Partial Least Squares (PLS). The results of this study confirm that referees and assistant referees are willing to use Multimedia Teaching Materials to assist them in their learning activities as long as they perceive the materials to be useful, enjoyable and easy to use and whenever the course contents are multimedia. 相似文献
3.
Shu-Sheng Liaw 《Interactive Learning Environments》2016,24(3):625-643
This paper investigates the use of e-books as learning tools in terms of learner satisfaction, usefulness, behavioral intention, and learning effectiveness. Based on the activity theory approach, this research develops a research model to understand learner attitudes toward e-books in two physical sizes: 10″ and 7″. Results suggest that screen size could affect learners' perceived self-efficacy in using 10″ and 7″ e-books. Interactive learning environments, acceptable screen size, perceived self-regulation, and self-efficacy could positively influence perceived satisfaction with and usefulness of e-books as learning tools. Perceived satisfaction and usefulness are crucial factors in learner behavioral intention which, in turn, contributes to learning effectiveness. The paper also proposes a conceptual research model based on the activity theory approach. 相似文献
4.
Leslie Rutkowski David Rutkowski Yuan-Ling Liaw 《Assessment in Education: Principles, Policy & Practice》2019,26(6):643-664
ABSTRACTModern international studies of educational achievement have grown in terms of participating educational systems. Accompanying this development is an increase in heterogeneity, as more and different kinds of educational systems take part. This growth has been particularly pronounced among low-performing, less economically developed systems. Although studies such as PISA have made modifications to account for increased diversity, the degree to which international assessments serve educational systems at the lower ends of the achievement continuum is understudied. We used modified Wright maps and PISA’s definition of proficiency to evaluate the fitness of PISA, especially among low performers. Our findings suggest that there is mismatch between some populations and PISA. Results from a simulation show that such disparities produced biased achievement estimates and correlations with policy relevant variables. Projected PISA growth and new instantiations of PISA, particularly geared toward developing educational systems, make these findings timely and especially relevant. 相似文献
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Shu-Sheng?LinEmail author Joel?J.?Mintzes 《International Journal of Science and Mathematics Education》2010,8(6):993-1017
This article describes an effort to explore and enhance argumentation skills of Taiwanese grade 6 students through instruction
in socioscientific issues. An experienced elementary school teacher was given 8 months of personalized instruction on argumentation
skills and socioscientific issues, then subsequently implemented a 17-h classroom unit on the establishment of Ma-Guo National
Park. His students learned to establish claims and warrants, construct counterarguments, offer supportive arguments, and provide
evidence for each one. Data consisted of student responses to questionnaires and individual follow-up interviews. A multiple
regression analysis revealed that success in learning argumentation skills was not substantially related to pre-instruction
argumentation skills, but significantly related to the student ability levels. High-ability students were significantly better
than low-ability students at generating complete arguments. Most students elaborated their arguments, and more high-ability
students offered rebuttals after instruction. However, even these high achievers did not completely understand the meaning
of evidence and often misused supplementary warrants as evidence. 相似文献
7.
Liaw Beng Teck 《Asia Pacific Journal of Education》1989,10(1):55-59
The study was carried out to examine the effects of practical experience and sequential skills on achievement in map reading among secondary one pupils in Singapore. A total of 144 pupils in four secondary one (Express) classes participated in the study. Each class ws randomly assigned to one of the four treatment groups, where two teaching methods, i.e. practical learning and direct-teaching, and two types of curriculum structure, i.e. hierarchical sequence and non-hierachical sequence, were compared. The experiment consisted of eight weeks of teaching after which a post-test and a delayed post-test were administered to establish the effects of each treatment. Findings showed that practical experience and sequential skills in map reading would have a positive effect on pupil performance and retention of the acquired skills. 相似文献
8.
Tzu-Chiang Lin Ying-Shao Hsu Shu-Sheng Lin Maio-Li Changlai Kun-Yuan Yang Ting-Ling Lai 《International Journal of Science and Mathematics Education》2012,10(2):437-455
This content analysis of articles in the Social Science Citation Index journals from 1995 to 2009 was conducted to provide
science educators with empirical evidence regarding the effects of scaffolding on science learning. It clarifies the definition,
design, and implementation of scaffolding in science classrooms and research studies. The results show important cross-study
evidence that most researchers have adopted a qualitative approach (67.44%), focused on learning context (72.09%), and used
high school students as participants (53.49%). In designing scaffoldings, researchers have shown a preference for long-term
explicit scaffolding using multiple representations to promote procedural and strategic skills and alternative assessments
of learner performance. Nevertheless, scaffolding issues related to teacher education are unexpectedly few (11.63%) in empirical
research. The results also indicate that there are too few studies to guide researchers in considering fading scaffolds for
active learning (9.30%). Future directions and suggestions toward conducting research regarding scaffolding are provided. 相似文献
9.
En-Chong Liaw 《Teacher Development》2017,21(4):496-510
To investigate the context-related teacher efficacy (TE) of experienced teachers in Taiwan, this study examined elementary English teachers more than a decade after a major educational reform to determine whether their TE levels were affected by school location (e.g. urban vs. suburban). The 438 responses to the adapted Teacher Efficacy Scale revealed stronger efficacy regarding the teachers’ personal ability to teach less-motivated students and less confidence regarding the management of school- and government-related concerns. However, school settings did not show a significant effect on the efficacy levels of experienced English teachers. Although caution must be practiced in interpreting results related to school settings and TE, the findings from the current study are generalizable to contexts in which English is spoken as a foreign language. The results also urge much caution when making interpretation on results relating to school settings and TE. 相似文献
10.
Mei‐Hung Chiu Chin‐Cheng Chou Wen‐Lung Wu Hongming Liaw 《British journal of educational technology : journal of the Council for Educational Technology》2014,45(3):471-486
This paper explores whether facial microexpression state (FMES) changes can be used to identify moments of conceptual conflict, one of the pathways to conceptual change. It is known that when the preconditions of conceptual conflicts are met and conceptual conflicts are detected in students, it is then possible for conceptual change to take place. There were 102 university and high school students who were involved in this research, and about 80% of the participants held erroneous preconceptions on the scientific topic chosen. The results showed that FMES changes were detected in the majority of the students who made erroneous predictions as they underwent conceptual conflict. Furthermore, the lack of FMES change was shown to indicate a lowered likelihood of conceptual change, while the presence of FMES change doubled the likelihood of conceptual change. The results confirm that FMES can be useful in determining learners’ awareness of conflicting concepts and their progress towards scientific understanding. Educational implications are discussed. 相似文献