Korean Science and Engineering Students’ Perceptions of English-Medium Instruction and Korean-Medium Instruction     

Eun Gyong Kim  Jeong-Ro Yoon 《Journal of Language, Identity & Education》2018,17(3):182-197

The purpose of this study was to examine how Korean science and engineering students view English-medium instruction (EMI) and Korean-medium instruction (KMI). The participants were 174 undergraduate students enrolled in EMI and KMI classes offered by the same instructor at a Korean science and engineering school. Interviews and questionnaire surveys were conducted, and students’ course evaluations, English scores and course grades were compared. The results of a campus-wide undergraduate student survey on EMI were also analyzed. The findings of the study show that the KMI-class students demonstrated higher levels of satisfaction and better performance in their classes than the EMI-class students did. Only 22% of the students in both classes found EMI classes helpful for improving their English ability. Nevertheless, the majority of the students supported the school’s maintenance of an EMI policy. In the conclusion, the paradoxical attitude of the students and the implications of the study are discussed.  相似文献   

Low-cost,disposable microfluidics device for blood plasma extraction using continuously alternating paramagnetic and diamagnetic capture modes     

Pilkee Kim  Eng Hui Ong  King Ho Holden Li  Yong-Jin Yoon  Sum Huan Gary Ng  Khuntontong Puttachat 《Biomicrofluidics》2016,10(2)

Blood plasma contains biomarkers and substances that indicate the physiological state of an organism, and it can be used to diagnose various diseases or body condition. To improve the accuracy of diagnostic test, it is required to obtain the high purity of blood plasma. This paper presents a low-cost, disposable microfluidics device for blood plasma extraction using magnetophoretic behaviors of blood cells. This device uses alternating magnetophoretic capture modes to trap and separate paramagnetic and diamagnetic cells away from blood plasma. The device system is composed of two parts, a disposable microfluidics chip and a non-disposable (reusable) magnetic field source. Such modularized device helps the structure of the disposable part dramatically simplified, which is beneficial for low-cost mass production. A series of numerical simulation and parametric study have been performed to describe the mechanism of blood cell separation in the microchannel, and the results are discussed. Furthermore, experimental feasibility test has been carried out in order to demonstrate the blood plasma extraction process of the proposed device. In this experiment, pure blood plasma has been successfully extracted with yield of 21.933% from 75 μl 1:10 dilution of deoxygenated blood.  相似文献   

The impact of conflicting goals on mathematical teaching decisions     

Mike Thomas  Caroline Yoon 《Journal of Mathematics Teacher Education》2014,17(3):227-243

This paper describes part of an international project considering graphical construction of antiderivative functions in the secondary mathematics classroom. We use Schoenfeld’s resources, orientations, and goals (ROGs) framework to analyse the decisions made by a teacher, Adam, during a lesson on graphical antiderivatives. We present details of Adam’s ROG and see how this is related to resolution of the conflict between his competing goals and the decisions he makes. The results suggest that a beneficial professional development strategy might be to assist teachers to become more aware of their ROG and its influence on in-the-moment classroom decisions.  相似文献   

Two-Step Approach to Partial Factorial Invariance: Selecting a Reference Variable and Identifying the Source of Noninvariance     

Eunju Jung  Myeongsun Yoon 《Structural equation modeling》2017,24(1):65-79

To date, no effective empirical method has been available to identify a truly invariant reference variable (RV) in testing measurement invariance under a multiple-group confirmatory factor analysis. This study proposes a method that, in selecting an RV, uses the smallest modification index (min-mod). The method’s performance is evaluated using 2 models: (a) a full invariance model, and (b) a partial invariance model. Results indicate that for both models the min-mod successfully identifies a truly invariant RV (Study 1). In Study 2, we use the RV found in Study 1 to further evaluate the performance of item-by-item Wald tests at locating a noninvariant variable. The results indicate that Wald tests overall performed better with an RV selected in a partial invariance model than an RV selected in a full invariance model, although in certain conditions their performances were rather similar. Implications and limitations of the study are also discussed.  相似文献   

Specification Search for Identifying the Correct Mean Trajectory in Polynomial Latent Growth Models     

Minjung Kim  Oi-Man Kwok  Myeongsun Yoon  Victor Willson  Mark H. C. Lai 《Journal of Experimental Education》2016,84(2):307-329

This study investigated the optimal strategy for model specification search under the latent growth modeling (LGM) framework, specifically on searching for the correct polynomial mean or average growth model when there is no a priori hypothesized model in the absence of theory. In this simulation study, the effectiveness of different starting models on the search of the true mean growth model was investigated in terms of the mean and within-subject variance-covariance (V-C) structure model. The results showed that specifying the most complex (i.e., unstructured) within-subject V-C structure with the use of LRT, ΔAIC, and ΔBIC achieved the highest recovery rate (>85%) of the true mean trajectory. Implications of the findings and limitations are discussed.  相似文献   

Voting for Change: an International Study of Students’ Willingness to Support Measures to Ameliorate Climate Change     

Skamp  Keith  Boyes  Eddie  Stanisstreet  Martin  Rodriguez  Manuel  Malandrakis  George  Fortner  Rosanne  Kilinc  Ahmet  Taylor  Neil  Choker  Kiran  Shweta  Dua  Ambusaidi  Abdullah  Cheong  Irene  Kim  Mijung  Yoon  Hye-Gyoung 《Research in Science Education》2021,51(3):861-887

Research in Science Education - Voting for various pro-environmental governmental policies is an indirect, but potentially effective, action that citizens can take to reduce global warming (GW) and...  相似文献   

Social Work in Higher Education: Internships in Opportunity Programs     

Melissa L. Bessaha  Carmen L. Solis  Cheryl L. Franks  Heejin Yoon  Delmar Dualeh  Hugo Monroy-Caceres 《Journal of Teaching in Social Work》2018,38(4):417-430

ABSTRACT

Field education is essential to the development of professional social workers. Despite the significant overlap in social work’s and higher education’s missions and values, there is a scarcity of social work internships specifically in higher education settings. The placement of social work interns in institutions of higher education provides a setting where they can develop new knowledge and skills and increase their capacity to support college students toward academic success. This conceptual article discusses the role of social work in higher education and provides a model social work internship in an opportunity program, including its creation, development, challenges, outcomes, and future direction.  相似文献   

Cultural Differences in the Role of Perceived Descriptive Norms in Behavioral Intentions     

Hee Sun Park  Soe Yoon Choi  Hanna Joo 《Communication Research Reports》2013,30(1):14-22

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Searching images in daily life     

JungWon Yoon 《Library & information science research》2011,33(4):269-275

With the proliferation of images in daily life, it is crucial to investigate what, where, why and how people search images in response to their everyday needs. In order to examine the daily needs of image searchers, a survey questionnaire was administered to 58 college students. The results demonstrated that the majority of college students use Google or Google Image for searching images, because of its familiarity and user-friendly interface. Although searchers reported a high success rate (85.6%) of image retrieval, they wanted search engines to return more relevant images and fewer irrelevant and redundant images. They also desired search engines to provide high resolution and full scale images. Students searched for images for various purposes, including to: prepare presentation materials, use as computer wallpaper, get ideas for purchasing, travel destinations, or beauty/fashion items, see what something looks like, verify names, solve problems, out of curiosity, and so on. Some types of needs revealed that users were interested in associated textual information, as well as the image itself. The implications for image retrieval system design are 1) it is proposed that metadata information (size, quality, type, copyright information) be utilized in browsing or navigating images, and 2) further research on an information retrieval system that can support users looking for both text and images concurrently is suggested.  相似文献   

Teachers: A Critical But Overlooked Component of Bullying Prevention and Intervention     

Jina Yoon  Sheri Bauman 《理论付诸实践》2014,53(4):308-314

To complete this special issue on theoretical bases for antibullying efforts in schools, we focus in this article on the importance of teachers and other educators in the ecology of schools. First, we present evidence that teachers are not perceived to be effective at intervening when bullying occurs. Then, using a social motivational lens, we provide an overview of teachers' role as a socializing agent in the classroom and school with a particular emphasis on their influence on bullying behaviors among students. Then we present two theories, the theory of planned behaviors, and the transactional theory of emotions and coping. We believe these theories highlight the complexity of teacher responses and make the case that teachers need more than knowledge of bullying to be effective in their role. We discuss implications for teacher training and professional development.  相似文献