Comparing the standards of one metabolic equivalent of task in accurately estimating physical activity energy expenditure based on acceleration     

Dohyun Kim  Jongshill Lee  Hoon Ki Park  Dong Pyo Jang  Soohwa Song  Baek Hwan Cho 《Journal of sports sciences》2017,35(13):1279-1286

The purpose of the study is to analyse how the standard of resting metabolic rate (RMR) affects estimation of the metabolic equivalent of task (MET) using an accelerometer. In order to investigate the effect on estimation according to intensity of activity, comparisons were conducted between the 3.5 ml O₂ · kg^?1 · min^?1 and individually measured resting VO₂ as the standard of 1 MET. MET was estimated by linear regression equations that were derived through five-fold cross-validation using 2 types of MET values and accelerations; the accuracy of estimation was analysed through cross-validation, Bland and Altman plot, and one-way ANOVA test. There were no significant differences in the RMS error after cross-validation. However, the individual RMR-based estimations had as many as 0.5 METs of mean difference in modified Bland and Altman plots than RMR of 3.5 ml O₂ · kg^?1 · min^?1. Finally, the results of an ANOVA test indicated that the individual RMR-based estimations had less significant differences between the reference and estimated values at each intensity of activity. In conclusion, the RMR standard is a factor that affects accurate estimation of METs by acceleration; therefore, RMR requires individual specification when it is used for estimation of METs using an accelerometer.  相似文献   

The Culture of Pediococcus pentosaceus T1 Inhibits ?Listeria Proliferation in Salmon Fillets and Controls Maturation of Kimchi     

Seongho Jang  Dongyun Lee  Il Sang Jang  Hyeon-Son Choi  Hyung Joo Suh 《Food Technology and Biotechnology》2015,53(1):29-37

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Development of PCK for novice and experienced university physics instructors: a case study     

Syh-Jong Jang  Meng-Fang Tsai  Ho-Yuan Chen 《Teaching in Higher Education》2013,18(1):27-39

The current study assessed and compared university students' perceptions' of a novice and an experienced physics instructor's Pedagogical Content Knowledge (PCK). Two college physics instructors and 116 students voluntarily participated in this study. The research model comprised three workshops, mid-term and final evaluations and instructor interviews. The results showed that each instructor's PCK performance in four categories was slightly improved, though the difference was not statistically significant and only the category of Instructional Representation and Strategies (IRS) was found to be statistically different by students' evaluations of their instructor's PCK. The experienced instructor emphasized life examples and experiments, whereas, the novice instructor emphasized explanations and quizzes. Furthermore, the PCK questionnaire provided university instructors with adequate information so the instructors could receive students' feedback as available sources to reflect on their teaching to improve their quality of teaching. Research implications of this study are provided along with suggestions for future research.  相似文献   

Two‐dimensional sectioned images and three‐dimensional surface models for learning the anatomy of the female pelvis     

Dong Sun Shin  Hae Gwon Jang  Sung Bae Hwang  Dong‐Hwan Har  Young Lae Moon  Min Suk Chung 《Anatomical sciences education》2013,6(5):316-323

In the Visible Korean project, serially sectioned images of the pelvis were made from a female cadaver. Outlines of significant structures in the sectioned images were drawn and stacked to build surface models. To improve the accessibility and informational content of these data, a five‐step process was designed and implemented. First, 154 pelvic structures were outlined with additional surface reconstruction to prepare the image data. Second, the sectioned and outlined images (in a browsing software) as well as the surface models (in a PDF file) were placed on the Visible Korean homepage in a readily‐accessible format. Third, all image data were visualized with interactive elements to stimulate creative learning. Fourth, two‐dimensional (2D) images and three‐dimensional (3D) models were superimposed on one another to provide context and spatial information for students viewing these data. Fifth, images were designed such that structure names would be shown when the mouse pointer hovered over the 2D images or the 3D models. The state‐of‐the‐art sectioned images, outlined images, and surface models, arranged and systematized as described in this study, will aid students in understanding the anatomy of female pelvis. The graphic data accompanied by corresponding magnetic resonance images and computed tomographs are expected to promote the production of 3D simulators for clinical practice. Anat Sci Educ 6: 316–323. © 2013 American Association of Anatomists.  相似文献   

Exploratory analysis of decentralized governance and its implications for the equity of early childhood education services in four countries of Europe and Central Asia     

Liliana Angelica Ponguta  Carlos Aggio  Kathryn Moore  Elisa Hartwig  Bosun Jang  Jelena Markovic 《Early Years: An International Journal of Research and Development》2019,39(3):326-342

We conducted a qualitative study in four countries of the Europe and Central Asia (ECA) region and explored the Early Childhood Education (ECE) policy landscape with an emphasis on the challenges and opportunities decentralization has presented for the provision of services. We content-analyzed ECE policies and documents to map national approaches to ECE. Key informant interviews were conducted to assess the implementation of decentralized ECE governance. An analytical framework that combined core constructs of ECE systems and key domains of decentralization (autonomy, institutional capacity and accountability) was developed and applied. Our analysis points to four overarching processes that contribute to the perpetuation and possible increase of inequitable ECE including (1) sparse mechanisms for participatory and autonomous policy formulation, with few systematic efforts to strengthen local institutional capacities; (2) fragmented policy approaches to promote the assessment and strengthening of quality at scale; (3) funding frameworks and financing schemes that tend to benefit enrolment in contexts of higher levels of economic development; and (4) few mechanisms for coordination to ensure operational coherence across the ECE sector.  相似文献   

How the second screens change the way people interact and learn: the effects of second screen use on information processing     

Dong-Hee Shin  Hyeri An  Jang Hyun Kim 《Interactive Learning Environments》2016,24(8):2058-2079

The use of a second screen can enhance information processing and the execution of search tasks within a given period. In this study, we examined the learner's attentional shift (AS) between two screens and controlled secondary tasks (STs) in the media multitasking setting and its effect on the learning process. In particular, we analyzed how cognitive and emotional learning effects can be explored depending on the role of this setting. A between-subject experiment was conducted with 69 participants (simultaneous vs. sequential use of a second screen in terms of open versus closed STs). The findings showed that there was a greater difference in emotional learning effects than in cognitive learning effects for participants who used a second screen. In terms of estimated emotional learning effects of media multitasking, participants engaged in sequential use demonstrated lower anxiety levels and higher competence beliefs during learning compared to participants who were engaged in simultaneous use. Moreover, an interaction effect occurred in the AS between the two screens and in controlled STs of recognition memory. These results indicate that attentional change and controlled STs are key predictors of learning effects in the media multitasking environment.  相似文献   

The Impact of Multidimensionality on Extraction of Latent Classes in Mixture Rasch Models          下载免费PDF全文

Yoonsun Jang  Seock‐Ho Kim  Allan S. Cohen 《Journal of Educational Measurement》2018,55(3):403-420

This study investigates the effect of multidimensionality on extraction of latent classes in mixture Rasch models. In this study, two‐dimensional data were generated under varying conditions. The two‐dimensional data sets were analyzed with one‐ to five‐class mixture Rasch models. Results of the simulation study indicate the mixture Rasch model tended to extract more latent classes than the number of dimensions simulated, particularly when the multidimensional structure of the data was more complex. In addition, the number of extracted latent classes decreased as the dimensions were more highly correlated regardless of multidimensional structure. An analysis of the empirical multidimensional data also shows that the number of latent classes extracted by the mixture Rasch model is larger than the number of dimensions measured by the test.  相似文献   

Correction to: LGB identity and career decision-making self-efficacy among sexual minority college students     

Jang  Hansori  Smith  Carol K.  Duys  David K. 《International Journal for Educational and Vocational Guidance》2021,21(3):717-717

International Journal for Educational and Vocational Guidance - In the original article published, the first author’s affiliation is incorrect. The correct affiliation of the author Hansori...  相似文献   

Reclaiming the self: how Korean housewives make meaning of their experience of re‐entering higher education     

Suh Young Jang 《International Journal of Lifelong Education》2013,32(5):533-546

Well‐educated Korean women are returning to higher education in unprecedented numbers with the motivation of recovering their personal identity. The purpose of this qualitative study is to understand the ways in which this experience is meaningful to these re‐entry women. In‐depth interviews were conducted with 13 Korean full‐time housewives aged 25 to 45 who already had a bachelor’s degree but enrolled at university. The constant comparative method was employed for data analysis. The major findings of this study were that the re‐entry experiences were meaningful for the participants in that they re‐established themselves as independent individuals, dispelled a sense of isolation, obtained a sense of accomplishment, gained recognition and structured their everyday lives. These experiences are perceived as meaningful because attending university addressed the sources of discontent in their lives.  相似文献   

A study of students' construction of science knowledge: talk and writing in a collaborative group     

Jang Syh-Jong 《Educational research; a review for teachers and all concerned with progress in education》2013,55(1):65-81

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