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   

Searching for an image conveying connotative meanings: An exploratory cross-cultural study     

JungWon Yoon   《Library & information science research》2008,30(4):312-318

On the basis of the semiotics premise, this exploratory study examined cultural influences that pertain to the image search process when users have connotative needs. The study used the Semantic Differential, a quantitative tool for measuring affective reactions, as well as word-based analysis, to analyze responses to a survey questionnaire administered to twelve Korean and twelve American students. The results demonstrated that even when completing the same task, participants from different backgrounds have different tendencies in expecting and selecting a relevant image. The results supported the semiotics assertion that cultural context results in variations in interpreting the connotative messages of an image, and these variations are restricted by cultural boundaries. The study underlined the potential of using the Semantic Differential to enhance accessibility to connotative messages during the image retrieval process. Based on the findings, some suggestions for image retrieval system design were discussed. This study will broaden understanding of connotative messages in terms of image retrieval and user behaviors. The conclusions will contribute to designing a practical image retrieval system that can provide subject access to connotative messages.  相似文献   

A sociocultural theoretical approach to understanding mentor–mentee interactions during a Teaching English as a Second Language practicum at the master’s degree level     

Jungwan Yoon  Jamie Kim 《Mentoring & Tutoring: Partnership in Learning》2019,27(1):88-108

Drawing on the sociocultural theoretical (SCT) perspective, we offer a microgenetic analysis of mentor–mentee interactions in the context of pre-service teachers’ practicum in a Master’s program for Teaching English as a Second Language (TESL). Following two pairs of mentors and mentees, we analyze audio-recorded interactions and interviews and examine in depth how mediation occurs during mentoring and how such mediation assists the mentees in learning to become teachers. Our findings show that mentors’ mediation is dynamic and contingent upon the context in which mentoring occurs and that the quality and character of mentor–mentee interactions during goal-directed activities is a critical feature of promoting the mentees’ learning. Responsive mediation especially plays a key role in promoting the mentees’ cognitive development, and it is an essential component of effective mentoring. This calls for a more SCT-informed approach to conceptualizing mentoring and training mentors in practicums.  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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