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The Importance of Decoding Skills in Predicting Vocabulary Knowledge
Hyobin Ahn 한국응용언어학회 2016 응용 언어학 Vol.32 No.1
The present study was designed to investigate the relationship between two prominent constructs of reading, decoding skills and vocabulary knowledge, and to explore whether there is a change in the relation between the two variables, depending on the general English proficiency of the students. The participants of this study were 56 Korean middle school students in grade one, who were divided into two highly distinguishable groups in terms of their English proficiency: High-achieving Students (HS) and Low-achieving Students (LS). Data on the decoding skills and vocabulary knowledge of the participants were collected. These were later evaluated by a series of correlation and regression analyses. The results of all samples put together indicated a strong correlation between decoding skills and vocabulary knowledge. The decoding skills turned out to be a significant predictor of vocabulary knowledge. However, when the results of the two groups were compared, they showed sharply dissimilar outcomes: while the outcome of LS was almost equivalent to the results of the whole sample, the decoding skills of HS were not significantly related to, nor did they make significant contribution to, the vocabulary knowledge. Implications on policy and classroom instructions are discussed in the paper.
Hyobin Ahn 팬코리아영어교육학회(구 영남영어교육학회) 2016 영어교육연구 Vol.28 No.1
The present study investigated the role of decoding skills and oral vocabulary knowledge inpredicting Korean EFL students’ reading comprehension abilities. In doing so, reading volumeand frustration degree were also considered as predicting variables of reading comprehension.The participants of the study were forty-two seventh-grade Korean middle school students, whowere tested on the measures of pseudo- and real-word decoding, oral vocabulary knowledge,reading volume, degree of frustration, and reading comprehension. Data were first analyzedwith correlation analysis, and a series of hierarchical regression analyses were further conductedin order to examine the relative predictive power of decoding skills and oral vocabularyknowledge. The results indicated that all of the variables were statistically significantlycorrelated to each other and both decoding skills and oral vocabulary knowledge explainedunique variance in reading comprehension even after controlling for the effects of readingvolume and frustration. However, when compared, oral vocabulary knowledge turned out to bea more powerful predictor of reading comprehension than decoding skills. Implications ontheory, policy, and classroom instructions are discussed.
자동차용 테일게이트 래치의 기어리스 타입 액추에이터에 대한 고찰
임효빈(Hyobin Lim),안석래(Seokrae Ahn),김민수(MinsuKim) 한국자동차공학회 2023 한국자동차공학회 학술대회 및 전시회 Vol.2023 No.11
Gearless actuator has garnered significant attention as an innovative motion control solution in the automotive industry and the field of mechanical engineering. Its integration, especially with the Tailgate Latch mechanism in automobiles, plays a crucial role in enhancing convenience and safety for vehicle users. This research focuses on evaluating the performance of Gearless actuators applied to Tailgate Latch mechanisms, conducting an indepth analysis of their advantages and disadvantages, and particularly highlighting research directions for overcoming their limitations.
Meejung Ahn,Poornima D. E. Weerasinghe-Mud,Hyobin Kim,Minju Kwon,Jeongtae Kim,Taekyun Shin 한국실험동물학회 2021 한국실험동물학회 학술발표대회 논문집 Vol.2021 No.7
Progranulin (PGRN) which is a secreted neurotrophin mediates cell cycle progression and cell motility that contribute to MHC-mediated antigen processing, pathogen removal, and autoimmunity. To evaluate the involvement of PGRN in experimental autoimmune neuritis (EAN) pathogenesis, as a model of human demyelinating diseases such as Guillain- Barré Syndrome. The expression of PGRN in rat sciatic nerves with EAN was studied. PGRN expression was increased significantly in EAN-affected sciatic nerves compared with normal rat sciatic nerves. The elevated levels of PGRN in the sciatic nerves of rats with EAN at the peak stage and then its expression was decreased significant at the recovery stage. The cellular phenotype of PGRN in EAN lesions consisted mainly of inflammatory cells including macrophages and Schwann cells whereas it was expressed constitutively in axons. Collectively, this study suggests that PGRN secreted by a variety of cells including macrophage, vascular endothelial cells and Schwann cells, plays either pro-inflammatory or tissue regenerative effects, or both depending on PGRN containing cell type, during the course of EAN, an animal model of human demyelinating disease. (Acknowledgement: This work was supported by the National Research Foundation of Korea: Grant number NRF-2017R1A2B4012478)
GaN light-emitting diodes on glass substrates with enhanced electroluminescence
Choi, Jun Hee,Ahn, Ho Young,Lee, Yun Sung,Park, Kyungwoo,Kim, Tae-Ho,Cho, Kyung Sang,Baik, Chan Wook,Kim, Sun Il,Yoo, Hyobin,Lee, Eun Hong,Choi, Byoung Lyong,Kim, Sung-Dae,Kim, Young-Woon,Kim, Miyoung The Royal Society of Chemistry 2012 Journal of materials chemistry Vol.22 No.43
<P>We report the enhanced electroluminescence (EL) of GaN light-emitting diodes (LEDs) on glass substrates by controlling GaN crystal morphology, crystallinity, and device fabrication. Depending on the degree of epitaxy, we studied three different GaN morphologies; randomly oriented GaN polycrystals, nearly single-crystalline pyramid arrays, and fully single-crystalline pyramid arrays, which were fabricated by controlling the epitaxial relationship with the substrates. At proper growth temperature, GaN crystallinity was improved with increasing GaN crystal size irrespective of the GaN crystallographic orientation, as determined by spatially resolved cathodoluminescent spectroscopy. All the different GaN morphologies were further fabricated into LEDs to investigate their EL characteristics. The optimized GaN LEDs on glass composed of the nearly single-crystalline GaN pyramid arrays exhibited excellent microscopic EL uniformity and luminance values of about 2700 and 1150 cd m<SUP>−2</SUP> at peak wavelengths of 537 and 480 nm, respectively.</P> <P>Graphic Abstract</P><P>GaN LEDs on glass exhibiting excellent microscopic and macroscopic uniformities by optimizing GaN pyramid crystallinity and related process. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c2jm34405j'> </P>