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이용준 ( Lee¸ Yongjun ) 한국독서학회 2020 독서연구 Vol.0 No.57
비교적 최근까지 동기에 관한 상당수의 연구가 개인의 내적 심리적 특성이나 인지적·정서적 기능에 초점을 두어 온 결과, 연구자들은 학습 과정에서 사회적 맥락이나 환경의 역할에 대해서는 상대적으로 관심을 덜 가진 측면이 있었다. 사회문화적 관점에 기반을 둔 읽기 동기 연구의 필요성과 의의에도 불구하고 이에 대한 연구가 부족하다는 인식 아래, 본고는 사회문화적 관점의 읽기 동기를 이해하기 위한 틀을 마련하고자 하였다. 이를 위해 본고에서는 동기 이론의 변천과 특징을 개관하고, 사회문화적 관점에 기반을 둔 읽기 동기 연구가 왜 필요하고, 어떠한 연구 방법들에 주목할 필요가 있는지, 그리고 이러한 사회문화적 관점의 동기가 읽기 교육이나 연구에 시사하는 바가 무엇인지를 살펴보았다. Most recent studies on motivation have focused on individuals’ inner psychological characteristics or cognitive and affective aspects. Consequently, researchers have tended to focus less on the impacts of sociocultural contexts and the environment on literacy motivation and learning. In today’s education system, there is a lack of research into reading motivation from the sociocultural perspective, despite its necessity and significance. Therefore, this study aimed to emphasize and discuss reading motivation through sociocultural lenses. Thus, this study outlined the transitions and characteristics of motivation theories. It also discussed why it is necessary to research reading motivation through a sociocultural perspective and highlighted which research methods deserve attention. Further, the study explored what these sociocultural motivation theories can mean for reading education and research.
Lee, Gunsup,Cho, SeungChan,Hoang, Phuong Mai,Kim, Dongjun,Lee, Yongjun,Kil, Eui-Joon,Byun, Sung-June,Lee, Taek-Kyun,Kim, Dae-Hyun,Kim, Sunghan,Lee, Sukchan Korean Society for Molecular and Cellular Biology 2015 Molecules and cells Vol.38 No.9
3D8 single chain variable fragment (scFv) is a recombinant monoclonal antibody with nuclease activity that was originally isolated from autoimmune-prone MRL mice. In a previous study, we analyzed the nuclease activity of 3D8 scFv and determined that a HeLa cell line expressing 3D8 scFv conferred resistance to herpes simplex virus type 1 (HSV-1) and pseudorabies virus (PRV). In this study, we demonstrate that 3D8 scFv could be delivered to target tissues and cells where it exerted a therapeutic effect against PRV. PRV was inoculated via intramuscular injection, and 3D8 scFv was injected intraperitoneally. The observed therapeutic effect of 3D8 scFv against PRV was also supported by results from quantitative reverse transcription polymerase chain reaction, southern hybridization, and immunohistochemical assays. Intraperitoneal injection of 5 and $10{\mu}g$ 3D8 scFv resulted in no detectable toxicity. The survival rate in C57BL/6 mice was 9% after intramuscular injection of 10 $LD_{50}$ PRV. In contrast, the 3D8 scFv-injected C57BL/6 mice showed survival rates of 57% ($5{\mu}g$) and 47% ($10{\mu}g$). The results indicate that 3D8 scFv could be utilized as an effective antiviral agent in several animal models.
Lee, Yongjun,Kim, Myungsin,Lee, Yongseok,Kwon, Junghan,Park, Yong-Lae,Lee, Dongjun IEEE 2019 IEEE/ASME Transactions on Mechatronics Vol.24 No.1
<P>Multi-Fingered haptics is imperative for truly immersive virtual reality experience, as many real-world tasks involve finger manipulation. One of the key lacking aspect for this is the absence of technologically and economically viable wearable haptic interfaces that can simultaneously track the finger/hand motions and display multi-degree-of-freedom (DOF) contact forces. In this paper, we propose a novel wearable cutaneous haptic interface (WCHI), which consists of 1) finger tracking modules (FTMs) to estimate complex multi-DOF finger and hand motion; and 2) cutaneous haptic modules (CHMs) to convey three-DOF contact force at the finger-tip. By opportunistically utilizing such different types of sensors as inertial measurement units, force sensitive resistor sensors, and soft sensors, the WCHI can track complex anatomically consistent multi-DOF finger motion while avoiding FTM-CHM electromagnetic interference possibly stemming from their collocation in the small form-factor interface; while also providing the direction and magnitude of three-DOF finger-tip contact force, the feedback of which can significantly enhance the precision of contact force generation against variability among users via their closed-loop control. Human subject study is performed with a virtual peg insertion task to show the importance of both the multi-DOF finger tracking and the three-DOF cutaneous haptic feedback for dexterous manipulation in virtual environment.</P>
이용준(Yongjun Lee),이세훈(Sehoon Lee),이정현(Junghyun Lee) 한국정보과학회 2004 한국정보과학회 학술발표논문집 Vol.31 No.2Ⅱ
본 논문에서는 협업 여과 추천의 사용자 정보 부족으로 발생하는 초기화 문제를 개선하기 위하여 스테레오 타입 정보를 활용하여 희소성 문제 해결 방안으로 스테레오타입 정보 기반의 사용자 성향 반영을 통한 계층적 구조를 가지는 가상 점수를 부여하여, 유사도 계산의 개선 및 추천의 정확도를 향상시킨다. 또한 항목의 속성을 분석하여 유사도가 높게 나타날 수 있는 항목을 선정하여 추천의 정확도를 향상시키고자 한다.
클리핑방법을 이용한 non-conformal interface 경계를 갖는 열전도 해석
이주희(Juhee Lee),장진우(Jinwoo Jang),이용준(Yongjun Lee),이상환(Sanghwan Lee),이현균(Hyeonkyun Lee) 대한기계학회 2016 대한기계학회 춘추학술대회 Vol.2016 No.12
In CFD(Computational Fluid Dynamics) or heat transfer problem using an unstructured grid, it is possible to divide a complex domain into several simple domains. However, the grid points on the interface between two domains are not matched completely so called non-conformal mesh. Thus, mesh handling technique is needed to deal with this problem. Especially, a similar problem occurs in multi-phase or multi-material system. Since fluxes are calculated two neighbor cells sharing a surface in a finite volume method, it is difficult to calculate the proper flux. In order to overcome the problem, we employed the clipping method that calculates the connectivity and geometrical informations between non-conformal cells on the interface. The clipping method is generally used for comptuer graphics and searches the shape information of the overlapped polygons. In this study, we implemented the clipping algorithm that calculates the area and center of overlapped polygons. To validate the clipping method, the 3-dimensional heat conduction with a non-conformal interface was performed and then, it represented the reasonable solutions.
YongJun Kwon,JeongJoon Ahn,TaeGyun Kim,Joon-Ho Lee 한국응용곤충학회 2009 한국응용곤충학회 학술대회논문집 Vol.2009 No.05
This study was conducted to determine whether trichome density affects the oviposition behavior of adult female Tetranychus urticae Koch on host plant leaves. Experiments were conducted with twenty replications on the leaf discs of each plant (Pear, 'Niitaka'; Apple, 'Fuji'; Strawberry, 'Meahyang'; 3cm diameter) at 25℃, 60-70% RH and a photoperiod of 16:8 (L:D) h. One female T. urticae was placed on each disc. The number and locations of laid eggs were recorded at 24 h intervals until T. urticae died. The trichomes were distributed along the midrib of abaxial surface of pear leaves but were evenly distributed on that of apple and strawberry leaves. Eggs were mostly laid along the midrib of pear leaf disc, but eggs were laid not only along the midrib but also randomly over the leaf disc of apple and strawberry. Therefore, it appeared that T. urticae preferred to lay eggs on the specific location where trichomes were densely distributed. Further study is needed to quantify how different distribution patterns of T. urticae eggs on different plant leaves affect the efficacy of predatory mites to control T. urticae.
Pictures Speak Louder than Words: Motivations for Using Instagram
Lee, Eunji,Lee, Jung-Ah,Moon, Jang Ho,Sung, Yongjun Mary Ann Liebert 2015 CYBERPSYCHOLOGY BEHAVIOR AND SOCIAL NETWORKING Vol.18 No.9
<P>While Instagram, the rising photo-sharing social networking service, has received increasing attention from scholars and practitioners, little is known about the social and psychological factors that lead consumers to become fanatics of this app. To provide a baseline understanding of Instagram users, the current study aims to uncover the structural dimensions of consumers' motives for using Instagram and to explore the relationships between identified motivations and key attitudinal and behavioral intention variables. A comprehensive survey was developed in which a total of 212 Instagram users evaluated their motivation, primary activities, use intention, and attitude regarding Instagram. The results suggest that Instagram users have five primary social and psychological motives: social interaction, archiving, self-expression, escapism, and peeking. The implications of this study's findings are discussed.</P>
Lee, Sang-Wook,Park, Seung Chul,Lim, Yongjun,Lee, Byoungho,Lee, Sin-Doo WILEY-VCH Verlag 2010 ADVANCED MATERIALS Vol.22 No.37
<B>Graphic Abstract</B> <P>Quasi-periodic colloidal networks are constructed on the basis of polymorphic meniscus convergence (MC) in an air-cavity-embedded, nano-colloidal system. Depending on the flow associated with the air-cavities, the colloidal particles are self-organized into nanowires through binary MC, Y-junctions through ternary MC, and X-junctions through quaternary MC. The colloidal networks in either square or hexagonal form reflect the flow symmetry according to the air-cavity deformation. <img src='wiley_img_2010/09359648-2010-22-37-ADMA201001336-content.gif' alt='wiley_img_2010/09359648-2010-22-37-ADMA201001336-content'> </P>
Lee, Yongjun,Yun, Seok Joon,Kim, Youngbum,Kim, Min Su,Han, Gang Hee,Sood, A. K.,Kim, Jeongyong The Royal Society of Chemistry 2017 Nanoscale Vol.9 No.6
<P>Exciton transitions are mostly responsible for the optical properties of transition metal dichalcogenide monolayers (1L-TMDs). Extensive studies of optical and structural characterization indicated that the presence of local structural defects and charge population critically influence the exciton emissions of 1L-TMDs. However, due to large variations of sample and experimental conditions, the exact mechanism of the exciton emission influenced by local structural defects and charge population is not clearly understood. In this work by using near-field scanning optical imaging and spectroscopy, we directly visualized spatially-and spectrally-resolved emission profiles of excitons, trions and defect bound excitons in CVD-grown monolayer tungsten disulfide (1L-WS2) with similar to 70 nm spatial resolution. We found that exciton emission is spatially uniform while emission of trions and defect bound excitons was strongly modulated by the presence of structural features such as defects and wrinkles. We also visually observe a strong correlation between local charge accumulation and the trion formation upon increased photo-excitation.</P>