A study on the application method of the Functional Requirements for Bibliographic Records (FRBR) to the Online Public Access Catalog (OPAC) in Korean libraries     

Jane Cho   《Library Collections, Acquisitions, and Technical Services》2006,30(3-4):202-213

The work-set algorithm to automatically convert a bibliographic database into a Functional Requirements for Bibliographic Records (FRBR) structure has been developed and operated. However, in case the authority control is not properly performed as in Korean catalogs, it is impossible to FRBRize using only the automechanism. In such a case, a visual check must accompany the process; unfortunately, this requires extensive time and cost. Thus, in this case, it is desirable to cluster work-sets for a large-scale bibliographic database like a union catalog and to share the resulting work-sets with local libraries. To that end, this paper presents a method for extracting work-sets from the Korean union catalog using a semi-automatic mechanism. Additionally, it proposes methods to allow local libraries to apply the FRBR to their own OPAC using work-sets that result from the union catalog.  相似文献   

Wo es war: Psychoanalysis, Marxism, and Subjectivity     

Daniel  Cho 《Educational Philosophy and Theory》2007,39(7):703-719

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Use of NSE/PS2m-transgenic mice in the study of the protective effect of exercise on Alzheimer's disease     

Cho JY  Hwang DY  Kang TS  Shin DH  Hwang JH  Lim CH  Lee SH  Lim HJ  Min SH  Seo SJ  Song YS  Nam KT  Lee KS  Cho JS  Kim YK 《Journal of sports sciences》2003,21(11):943-951

In its late stage, Alzheimer's disease results in progressive muscle weakness in the arms and legs. The aim of this study was to determine whether mice expressing the skeletal muscle-specific mutant PS2 gene (a model of Alzheimer's disease) are a useful experimental system to study the protective effect of exercise on A beta-42 reduction, improvement of behavioural function and changes in metabolic parameters. With this aim in mind, the transgenic mice were subjected to treadmill exercise for 3 months. The results showed that in transgenic mice, but not in normal mice, treadmill exercise resulted in a reduction of A beta-42 deposits and an improvement in behavioural function, thereby restoring normal concentrations of total cholesterol, high-density lipoprotein cholesterol, low-density lipoprotein cholesterol and triglyceride. Thus, exercise may represent a practical therapeutic strategy for use with human patients with Alzheimer's disease.  相似文献   

A study of the relationship between concept emphasis in high school biology textbooks and achievement levels     

Hee-Hyung Cho  Jane Butler Kahle 《科学教学研究杂志》1984,21(7):725-733

A two part study investigated any relationship between student achievement and textbook content as well as any impact of a national project's recommendations on textbook content. First, analyses of student responses to biological items on the 1977 National Assessment of Educational Progress's survey of science showed a direct, linear relationship between achievement level and concept emphasis in biology textbooks. Second, a comparison between biology textbooks, published a decade apart, indicated significant changes in the degree of emphasis placed on 10 commonly accepted conceptual areas. Closer examination revealed that change in the amount of emphasis in one conceptual area, Growth and Development, was responsible for the significant difference found. Generally, the recommendations of the biology project were not reflected in the newer textbooks.  相似文献   

A Mixture Group Bifactor Model for Binary Responses     

Sun-Joo Cho  Allan S. Cohen  Seock-Ho Kim 《Structural equation modeling》2013,20(3):375-395

The presence of nuisance dimensionality is a potential threat to the accuracy of results for tests calibrated using a measurement model such as a factor analytic model or an item response theory model. This article describes a mixture group bifactor model to account for the nuisance dimensionality due to a testlet structure as well as the dimensionality due to differences in patterns of responses. The model can be used for testing whether or not an item functions differently across latent groups in addition to investigating the differential effect of local dependency among items within a testlet. An example is presented comparing test speededness results from a conventional factor mixture model, which ignores the testlet structure, with results from the mixture group bifactor model. Results suggested the 2 models treated the data somewhat differently. Analysis of the item response patterns indicated that the 2-class mixture bifactor model tended to categorize omissions as indicating speededness. With the mixture group bifactor model, more local dependency was present in the speeded than in the nonspeeded class. Evidence from a simulation study indicated the Bayesian estimation method used in this study for the mixture group bifactor model can successfully recover generated model parameters for 1- to 3-group models for tests containing testlets.  相似文献   

The Effects of Chloride on Durability of Concrete Mixed With Sea Sand     

Do-Gyeum Kim  Myung-Sug Cho  Jong-Suk Lee 《美中教育评论》2013,(5):325-331

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Managing knowledge performance: testing the components of a knowledge management system on organizational performance     

Taejun Cho  Russell Korte 《Asia Pacific Education Review》2014,15(2):313-327

The main purpose of the current study is to validate the framework of knowledge management (KM) capabilities created by Gold (Towards a theory of organizational knowledge management capabilities. Doctoral dissertation, University of North Carolina, Chapel Hill) 2001) in a study of South Korean companies. However, the original framework did not provide a thorough explanation of the effect of incentives, which motivate and encourage the knowledge management process. In this study, the modified framework that includes incentives in the knowledge infrastructure capability was tested. Moreover, since there is a weak linkage between KM and organizational performance, this study used empirical evidence to identify the relationship between KM capabilities (KMC) and four perspectives of organizational performance. Since structural equation modeling (SEM) is mostly used to describe causal relationships among unobserved (latent) and observed variables, this study used SEM procedures to determine whether there were any structural relationships between knowledge management capabilities and four perspectives of organizational performance. Moreover, the SEM procedure is “a statistical test to find whether a model fits a set of data, whether it matches a theoretical expectation” (Vogt, Dictionary of statistics & methodology. Sage Publications Inc., Thousand Oaks, CA, p 135, 2005). Therefore, this study also used SEM procedures to test a hypothesized model that had a good fit indicates that the model adequately describes the sample data. This study assumed that knowledge management capabilities could be divided into two types: knowledge infrastructure and process capabilities. The original hypothesized model showed that there was a positive relationship between knowledge management capabilities and organizational performance, but the overall model fit was insufficient to be accepted, because knowledge infrastructure and process capabilities were highly correlated. This study proposed two alternative models to find the best fit and found that knowledge infrastructure and process capabilities should be combined under the higher-order latent variable as subordinate latent variables. Lastly, there was a positive relationship between KMC and organizational performance. This study might not be free from common method bias to some degrees. It would be better to divide participants into two groups to respond to either the knowledge management capabilities survey or the organizational performance survey and to investigate the correlation between them. There are two main contributions for the field of knowledge management. First, this study attempted to integrate the fragmented literature of knowledge management into a holistic view and develop a framework for knowledge management. Moreover, this study found that there is a strong and positive relationship between KM infrastructure and process, which could refer that, to improve organizational performance, an organization should support KM processes, as well as build decent KM infrastructure. The results of this study would help KM practitioners to advocate the importance of KM to top managements.  相似文献   

A Comparison of Item Calibration Procedures in the Presence of Test Speededness     

Youngsuk Suh  Sun‐Joo Cho  James A. Wollack 《Journal of Educational Measurement》2012,49(3):285-311

In the presence of test speededness, the parameter estimates of item response theory models can be poorly estimated due to conditional dependencies among items, particularly for end‐of‐test items (i.e., speeded items). This article conducted a systematic comparison of five‐item calibration procedures—a two‐parameter logistic (2PL) model, a one‐dimensional mixture model, a two‐step strategy (a combination of the one‐dimensional mixture and the 2PL), a two‐dimensional mixture model, and a hybrid model‐–by examining how sample size, percentage of speeded examinees, percentage of missing responses, and way of scoring missing responses (incorrect vs. omitted) affect the item parameter estimation in speeded tests. For nonspeeded items, all five procedures showed similar results in recovering item parameters. For speeded items, the one‐dimensional mixture model, the two‐step strategy, and the two‐dimensional mixture model provided largely similar results and performed better than the 2PL model and the hybrid model in calibrating slope parameters. However, those three procedures performed similarly to the hybrid model in estimating intercept parameters. As expected, the 2PL model did not appear to be as accurate as the other models in recovering item parameters, especially when there were large numbers of examinees showing speededness and a high percentage of missing responses with incorrect scoring. Real data analysis further described the similarities and differences between the five procedures.  相似文献   

Are there peer effects associated with having English Language Learner (ELL) classmates? Evidence from the Early Childhood Longitudinal Study Kindergarten Cohort (ECLS-K)     

Rosa Minhyo Cho 《Economics of Education Review》2012

Over the past decade, several state and federal policies have directed schools to mainstream English Language Learner (ELL) students into English-only instruction classrooms. While there is mixed evidence on the effects of these immersion policies on the ELL students, research examining potential peer effects on their non-ELL classmates is non-existent. This paper begins to fill in this gap by using a nationally representative longitudinal sample of children in early elementary grades. Results indicate that having an ELL classmate during kindergarten and first grade is associated with lower test score gains in reading but not necessarily in math for non-ELL students whose primary language is English, controlling for unobserved fixed school characteristics as well as individual characteristics. The negative peer effects on reading test score gain are sensitive to the frequency of within classroom ability grouping usage, gender, and household income level of non-ELL children.  相似文献   

International students’ self-determined motivation,beliefs about classroom assessment,learning strategies,and academic adjustment in higher education     

Cho  Hyun Jin  Levesque-Bristol  Chantal  Yough  Mike 《Higher Education》2021,81(6):1215-1235

Higher Education - As an increasing number of international students are studying in English-speaking universities, there has been growing interest in exploring the factors and complexities that...  相似文献