Noninvasive geotechnical site investigation for stability of Cheomseongdae     

Park Heon-Joon  Kim Derk-Moon  Kim Ki-Seog  Ahn Hee-Yoon  Kim Dong-Soo 《Journal of Cultural Heritage》2012,13(1):98-102

Architectural heritages are exposed to natural and man-made disasters so that the need for research to prevent disasters has arisen. Cheomseongdae, known as the oldest astronomical observatory in East Asia, displays separation between the members and is tilted to the north-northeast. To diagnose the present conditions and to resolve problems, site investigations are performed. Boring is conducted in the surrounding ground of Cheomseongdae, and noninvasive investigations such as seismic tests and electrical resistivity surveys are conducted as well. The present study proposes a geotechnical engineering approach focused on noninvasive site surveys, and through this, relates current tilted condition of structure and provides information on the stability of Cheomseongdae.  相似文献   

Researchers Apply Lesson Study: A Cycle of Lesson Planning,Implementation, and Revision     

Kelley S. Regan  Anya S. Evmenova  Leigh Ann Kurz  Melissa D. Hughes  Donna Sacco  Soo Y. Ahn  Nichole MacVittie  Kevin Good  Andrea Boykin  Jessica Schwartzer  David S. Chirinos 《Learning disabilities research & practice》2016,31(2):113-122

Scripted lesson plans and/or professional development alone may not be sufficient to encourage teachers to reflect on the quality of their teaching and improve their teaching. One learning tool that teachers may use to improve their teaching is Lesson Study (LS). LS is a collaborative process involving educators, based on concepts of iteration and revision, to improve instruction. The initial use of an adapted version of LS referred to as a microteaching lesson study (MLS) is described in this article. Our purpose is to illustrate the process of MLS used by a group of researchers when developing lesson plans for teaching students with learning disabilities. We describe MLS, and then (1) share an application of MLS used by a research team in developing a writing intervention, and (2) discuss how the MLS format was mirrored with K‐12 teachers during professional development training.  相似文献   

Sample size and power estimates for a confirmatory factor analytic model in exercise and sport: a Monte Carlo approach     

Myers ND  Ahn S  Jin Y 《Research quarterly for exercise and sport》2011,82(3):412-423

Monte Carlo methods can be used in data analytic situations (e.g., validity studies) to make decisions about sample size and to estimate power. The purpose of using Monte Carlo methods in a validity study is to improve the methodological approach within a study where the primary focus is on construct validity issues and not on advancing statistical theory. The purpose of this study is to demonstrate how Monte Carlo methods can be used to determine sample size and to estimate power for a confirmatory factor analytic model under model-data conditions commonly encountered in exercise and sport. Because the purpose is pursued by way of demonstration with the Coaching Efficacy Scale II-High School Teams, related sample size recommendations are provided: N > or = 200 for the theoretical model; N > or = 300 for the population model. Technical terms (e.g., coverage) are defined when necessary.  相似文献   

花腰傣花街节文化的保护与发展——基于节日“申遗”的视角     

李银兵  沙蓉  李满华 《玉溪师范学院学报》2011,(11):32-36

节日文化遗产在当今社会政治、经济、文化和教育等方面的功能和价值日益突出,其可持续发展和合理化保护尤显重要。花腰傣花街节文化的保护与发展应该遵循文化生态原则,呼唤本民族的文化自觉,发挥专家学者的指导作用。  相似文献   

Hierarchical Logistic Regression in Course Placement     

E. Matthew Schulz  Damian Betebenner  Meeyeon Ahn 《Journal of Educational Measurement》2004,41(3):271-286

Whether hierarchical logistic regression can reduce the sample size requirement for estimating optimal cutoff scores in a course placement service where predictive validity is measured by a threshold utility function is explored. Data from courses with varying class size were randomly partitioned into two halves per course. Non-hierarchical and hierarchical analyses were performed on each half. Compared to their nonhierarchical counterparts, hierarchically estimated cutoff scores from different halves were more stable and predicted course outcomes in the other half more accurately. These differences were most pronounced with small samples. Sample size requirements for developing cutoff scores for course placement can be substantially reduced if hierarchical logistic regression is used.  相似文献   

Some problems in interpreting criterion-referenced test results in a program evaluation     

Mary Ann B. Barta  Unhai R. Ahn  Joseph F. Gastright   《Studies in Educational Evaluation》1976,2(3):193-202

The purpose of this paper is to delineate several problems which arise when criterion-referenced test results are used to evaluate the effects of a specific educational treatment. Specifically, the paper deals with: (1) alternative methods of aggregating individual student and group data on objectives, (2) the sensitivity of the instrument to program outcomes, and (3) the comparisons of criterion-referenced test data and standardized (norm-referenced) achievement test data.  相似文献   

Using contrasting cases to improve self-assessment in physics learning     

Jared Jax  Janet N. Ahn  Xiaodong Lin-Siegler 《教育心理学》2019,39(6):815-838

Self-assessment is essential to scientific literacy as stated by the National Research Council Committee on Conceptual Framework for the New K-12 Science Education Standards and has since been incorporated into the Next Generation Science Standards. However, little empirical evidence documents which instructional tools are beneficial in improving students’ self-assessment in science learning. As such, we conducted a classroom-based quasi-experiment to test whether contrasting case-based instructional supports improved 390 introductory high school physics students’ accuracy in self-assessment and academic performance when solving physics problems. We compared the effects of providing students with content knowledge and contrasting cases (contrasting good and poor solution) on students’ physics problem solving and their ability to self-assess, with the effects of either presenting them with content knowledge and good solutions or teaching only content knowledge. We found contrasting examples improved the accuracy of students’ self-assessments, promoted content learning, and enhanced the development of self-assessment strategies.  相似文献   

Child Care Teachers' Response to Children's Emotional Expression   总被引：1，自引：0，他引：1  

Hey Jun Ahn  Cynthia Stifter 《Early education and development》2006,17(2):253-270

This observational study examined practices through which child care teachers socialize children's emotion. A specific aim was to describe strategies of teacher intervention in response to emotion displayed by children in child care centers, and to answer the question of differential interactions based on children's age and gender.

The results of this study were as follows: (a) toddler teachers matched and encouraged children's positive emotion expression more often than did preschool teachers; (b) in response to children's negative emotion, toddler teachers used physical comfort and distraction more often than did preschool teachers who relied more on verbal mediation; (c) in response to girls' negative emotional expressions, teachers provided more physical comfort and distraction whereas they were more likely to provide boys with constructive ways to express negative emotion.

The results of this study also revealed relatively infrequent teaching about constructive ways of expressing negative emotion and very few occurrences of teacher's empathy, two developmentally appropriate methods for socializing emotion. Teachers may benefit from a training program focusing on facilitating emotional competence.  相似文献   

Symmetric and innerwise matrices for the root-clustering and root-distribution of a polynomial     

E.I. JuryS.M. Ahn 《Journal of The Franklin Institute》1972

The general problem of root-clustering and root-distribution of a polynomial in a certain region Γ in the complex plane has been investigated in this paper. The region Γ is general and includes all the previously investigated regions. For the root-clustering problem, it is shown that by using a certain transformation, the necessary and sufficient condition can be represented either in terms of positive definite (p.d.) or positive innerwise (p.i.) matrices. The entries in these matrices are rational functions of the coefficients of the polynomial. The connection between p.d. and p.i. matrices is established in terms of matrix multiplication.  相似文献   

A Study of Changes in the Library and Information Science Curriculum with Evaluation of Its Practicality     

Younghee Noh  In-Ja Ahn  Sang-Ki Choi 《The Journal of Academic Librarianship》2012,38(6):348-364

PurposeThis study analyzed the process of changes in Korean Library and Information Science curriculum and evaluated the courses currently available by using a perception survey of librarians in the field. It also explored a possible demand for new courses, while suggesting compulsory, core, and optional courses for Bachelor's degree curriculum in Library and Information Science worldwide including Korea and the US.Design/Methodology/ApproachThis study progressed through a total of 5 steps as follows: investigating the background of why current courses of Library and Information Science were offered (interview), finding out the current courses in Library and Information Science (homepage search and phone interview), finding out which courses students have actually completed among those available (literature and resource research), evaluating the practicality of the available courses by librarians in the field (survey), and exploring the demand for new courses (survey). In addition, this study analyzed the process of change in the courses offered by investigating the curriculum over the last 20 years.FindingsFirst and foremost, it was found that the decision of which course will be offered is strongly influenced by faculty. Second, in the analysis of the process of opening up new courses, it was revealed that the number of courses is growing and the courses are becoming more diversified and more specific. Third, the survey results of the completion of curriculum for the last three years in 10 universities demonstrate that only 50% of the available courses are being completed. Fourth, in the survey of which courses the librarians in the field think are necessary among the 90 courses suggested, 21 courses scored more than 4 points in a 5-point Likert scale regarding the demand for new courses. Fifth, the new courses which scored high levels of demand points were: Practice in Organizing and Managing Web Resources, Library Planning, Marketing, and Assessment, Understanding Information Technology for Managing Digital Collections, and Information and Communication in a Digital Age. Sixth, this study shows that there is a high level of agreement between courses completed by students and those which gained high levels of demand points in the practicality evaluation.Limitations/ImplicationsAs this study was performed in Korea where the Bachelor's degree course is fundamental, it will contribute valuable information to countries where universities have recently opened or are trying to open programs for Bachelor's degrees in Library and Information Science such as the US, or to curriculum study in countries such as China and Japan which have educational environments similar to Korea. However, similar studies need to be performed in different countries.Originality/ValueThis study has great significance as it has analyzed not only the curriculum of the last 20 years but also discovered how many of the newly created courses have actually been completed by students and the opinions of librarians in the field on these courses; there has not been such an encompassing study as this either inside or outside of Korea.  相似文献