• Proceedings of the Korean Information Science Society Conference
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• 1998.10c
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• pp.408-410
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• 1998

동영상에서 얼굴의 움직임을 이해하는 것은 인간과 컴퓨터간의 상호작용을 이루는 분야에서 중요한 문제이다. 본 논문에서는 2차원 동영상에서 얼굴요소 및 얼굴의 움직임을 측정하기 위해 optical flow를 통해 매개변수화된 움직임 벡터를 추출한다. 그리고 나서, 이를 소수의 매개변수들의 조합으로 만들어 얼굴의 움직임에 대한 정보를 묘사할 수 있게 하였다. 매개변수화된 움직임 벡터는 얼굴 및 얼굴 요소의 특징에 따라 다른 벡터 모델을 사용한다. 2차원 동영상에서 매개변수화된 움직임 벡터는 매 프레임마다 갱신되어 각 프레임에서 얼굴 및 얼굴 요소의 위치를 파악한다. 또한, 갱신된 벡터의 매개변수 조합으로 만들어 확인된 움직임에 대한 정보가 3차원 얼굴모델에 전달되며 3차원 얼굴 모델의 단위행위(Action Unit)와 연결되어 2차원 동영상에서의 얼굴 움직임을 합성할 수 있게 하였다.

• KSBB Journal
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• v.5 no.2
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• pp.133-139
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• 1990

A simple and convenient method was introduced to determine the kinetic parameters for various enzymatic reaction kinetics. The method based on integrated formular can be applied to the parameter estimations from a single experiment. A modified three-parameter model was applied for the parameter estimation in reversible reaction and the equilibrium substrate concentration could be also estimated. It is possible to identify the enzymatic reaction pattern by inspecting the parameter values and the square of the correlation coefficient.

• 월간산업보건
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• s.364
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• pp.42-46
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• 2018

• Journal of Life Science
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• v.27 no.5
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• pp.600-610
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• 2017

It was common that the classification of itching was classified into four categories according to the neurophysiological mechanisms of pruritoceptive itching, neuropathic itching, neurogenic itching and psychogenic itching. Recently it was classified by clinical criteria. The neurotransmission pathway of itch is divided into histamine-dependent pathway and histamine-independent pathway. Different receptors and neuropeptides act on each itch mediator. Itch mediators such as histamine, BAM8-22, and chloroquine are transmitted through the histamine-dependent pathway. Cowhage spicule, protease, and TSLP (Thymic stromal lymphopoietin) have been reported to be related to the histamine-independent pathway. These itch mediators, receptors, and neuropeptides are the targets of treatment for itching. Although itching and pain are typical noxious stimuli, and in the past, it was argued that two senses were transmitted through one noxious stimulus receptor. It has recently been shown that itching and pain have an independent neurotransmitter system and both neuronal systems inhibit each other. In addition, the mutual antagonism between itching and pain is explained by various mechanisms. Recently, many new mediators and receptors are being studied. The studies on histamine 4 receptor (H4 receptor) have been actively conducted. And the H4 receptors are expressed in immune cells such as T cells. The therapeutic agent for blocking the H4 receptor can inhibit the inflammatory reaction itself, which is important for the itching and chronicization. Understanding the underlying mechanisms of itching and studying new itch mediators will lead to the development of effective therapies, and this is what I think the itching study will go on.

• Korean Journal of Child Studies
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• v.25 no.5
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• pp.1-9
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• 2004

This study addressed ways in which poverty factors are associated with child physical aggression and how these relationships are moderated by parenting behavior. Using a longitudinal approach, parental poverty status was measured when children were 5 months; the Parenting Behaviour Questionnaire (Boivin et al., 2000) was administered when children were 17 months; and mothers reported child physical aggression behaviors when the children were 60 months. Using structure equation modeling analyses, the results of this study confirmed that parenting behavior is a mediator of the linkage between poverty and child physical aggression, showing the urgent need for early intervention for impoverished children.

• Journal of the Korean Society for information Management
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• v.31 no.4
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• pp.103-131
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• 2014

This study analyzed the effect of perceived interactivity in health information websites on users. First, this study analyzed the effect of users' individual characteristics on the perceived interactivity. As a result, hypochondriasis had a negative relationship with perceived interactivity, and health literacy had a positive relationship with it. On the other hand, although the perceived interactivity had a positive effect on users' attitudes toward health information websites and expected outcomes, it did not have an effect on continuous usage intention. However, their attitudes and perceived outcomes had a positive influence on continuous usage intention and at the same time mediated the perceived interactivity. Eventually, the perceived interactivity had an effect on continuous usage intention of health information websites by the medium of other positively related variables.

• Korean Journal of Childcare and Education
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• v.11 no.4
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• pp.1-17
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• 2015

The purpose of this study is to investigate the relationship between peer interaction, self-regulation and leadership of young children, and examine the mediating effect of self-regulation ability in the effect of peer interaction on the leadership of young children. The subjects of the study were 211 children aged 4 to 5 who attended in child education institutes in the Seoul-Incheon area. A survey was conducted on teachers who worked in kindergartens and day care centers with questionnaires, and the collected data were analyzed. For data analysis, SPSS WIN 21 program was used to calculate mean, standard deviation, skewness, and kurtosis, and correlation analysis was conducted. Also, the structural equation model was validated using Amos 21, and the following results were obtained. First, the positive peer interaction, self-regulation and leadership of children were positively associated. Second, the peer interaction did not have a significant effect on the leadership of young children, and the self-regulation of young children had a positive effect on the leadership of young children. It was found that peer interaction had a positive effect on the self-regulation of young children, and in the relationship of effects on the leadership of young children, the self-regulation was found to play a role of significant mediating effect. Such results are remarkable elements in leadership education for young children, implying the importance of peer interaction and self-regulation of young children.

• Journal of the korean veterinary medical association
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• v.25 no.10
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• pp.595-606
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• 1989

항원제시세포(APC)와 보조T세포 간의 협력작용에 의하여 활성화된 작동세포(NK세포, CTL, K세포, 대식세포, 과립구 등)의 종양세포, 이식장기 및 세포내기생세균에 감염된 각종 세포에 대한 세포독성작용은 생체방어를 위한 중요한 세포성면역기전이다. 지난 몇 년간 세포성면역기전에 관한 많은 연구에도 불구하고 T림파구매개성 세포독성작용의 면역생물학적기전은 확실히 밝혀있지 않다. 지금까지 알려진 중요한 연구내용을 요약하면 다음과 같다. 1. 세포독성작용을 나타내는 작동세포로는 NK세포, CTL, K세포, 대식세포/단핵구 및 과립구가 있다. 2. T세포의 세포표면항원분자군(CD)으로는 $CD_{2},\;CD_{3},\;CD_{4}[Ly_{3}T_{4}],\;CD_{5}[=Ly_{1}],\;CD_{7},\;CD_{8}[Ly_{2,3}]$가 있으며 $CD_{4}$는 보조Ttpvhdml 특이마커이고 $CD_{8}$는 세포독성 T세포 및 억압T세포의 특이마커이다. 주요 T세포수용체(TCR)는 $CD_{4}$ 또는 $CD_{8}$ 분자와 가까이 연합된 이향체($TCR-{\alpha}{\beta}/TCR-{\gamma}{\delta}$이며 보조 T세포 $CD_{4}$(마우스 $L_{3}T_{4}$)는 수용체와 연합되어 있는반면 억압 T세포 $CD_{8}(Ly+_{2,3})$는 항원수용체와 연합되어 있다. 3. T세포는 Ti-$CD_{3}$(항원/MHC) 복합체를 통한 '항원가교'에 의한 자극(항원인식)과 $CD_{2}$를 통한 비특이경로에 의하여 활성화(분화증식)된다. 비특이경로를 통한 활성경로에서 T세포($CD_{4}$ 및 $CD_{8}$)가 활성화되기 위하여는 보조T세포가 생산하는 IL-2을 요구하며 IL-2의 자극으로 분화증식된 $CD_{8}$는 세포독성능을 나타내지만 $CD_{4}^{+}$는 여전히 세포독성능을 나타내지 못한다. 4. 보조T세포는 class II MHC분자와 연합된 항원을 식별하는 반면 세포독성T세포는 class I MHC 분자와 연합된 항원을 식별한다. 5. 림파구 매개성 세포독성은 접촉(conjugati-on), 탈분극(depolarization), 용해계획(progra-mming), 용해(lysis) 및 재순환(recycling)의 단계를 거쳐 진행된다. 6. 표적세포살해매체로는 perforin / PFP / cy-tolysin, lymphopores, lymphotoxins, protone, cytolytic enzymes가 알려졌으며 세포독성작용은 이들 이외에도 여러 가지 매체를 통한 복합작용으로 추정된다. 7. CTL 매개성 표적세포의 주요 대사변화는 actomyocin ATPase의 증가, phosphocreatine과 ATPase의 소모, ATP 의존성 $Na^{+}/K^{+}$ 펌프작용의 중지, ATP 의존성 $Ca^{2+}$ 유출감소 및 세포내 축적이 관찰된다. 8. $Ca^{2+}$의 축적으로 세포막 교질 침투손상을 주어 수분의 유입을 증가시킴으로써 수포형성, 핵붕괴, 사립체팽화 및 정상세포 구조상실(Zeiosis)이 있다. 결론적으로 CTL 매개성 세포독성작용은 PFP, LT, TNF, 유사 TNF / LT 및 기타 매체를 통한 복합작용이며 세포살해기전은 지속적 대사소모와 정형적 세포구조(핵 및 세포질)의 파괴에 의한 것이다.

• Management & Information Systems Review
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• v.34 no.4
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• pp.97-120
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• 2015

This study examined the role and relationship among cognitive response(attractiveness, familiarity, actual self-congruence, ideal self-congruence and sympathy) factors, emotional response(empathy, flow, affection) factors, identification mediating between cognitive and emotional response, and interactivity. Hypotheses based on literature reviews were analyzed and according to the results, all of hypotheses except two hypotheses were supported. Firstly, the results revealed that except characteristic attractiveness and actual self-congruence, story attractiveness, characteristic familiarity, story familiarity, and ideal self-congruence influenced on sympathy positively. Secondly, this study examined the role and relationship between identification mediating between cognitive and emotional response and interactivity. As a result, identification and interactivity mediated with sympathy and empathy had positive effects. Finally, in respect of emotional responses empathy, flow, and affection had positive effects.

• Journal of Digital Convergence
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• v.20 no.5
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• pp.357-362
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• 2022

This study classified the characteristics of one-person media into two factors: interactivity and entertainment, and investigated the effect on intention of usage and the mediating effect of perceived value. In order to confirm this, this study conducted an empirical analysis targeting Chinese people who have experience watching one-person media real-time broadcasting and Chinese students studying in South Korea. As a result of the analysis, it was found that the interactivity and entertainment of one-person media had a positive (+) effect on intention of usage, and the partial mediating role of the perceived value was also verified in the relationship between the characteristics of one-person media and the intention of usage. Based on the above results, characteristics such as interactivity and entertainment of one-person media were identified as important factors that can increase users' intention to use. In addition, it also introduces the significance of this study, and reviews the limitations of the study and the direction of follow-up research.