• 한국보육지원학회지
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• 제13권6호
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• pp.163-179
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• 2017

Objective: The purposes of this study are to test a direct effect of mother-child interaction and to examine the mediating effect of children's smart media use on a child's sleeping hours. Methods: We analyzed the longitudinal data of 1,494 children from the $6^{th}$ panel study of Korean children collected by the Korea Institute of Child Care and Education in 2013, which examined 5-year-old children. The main analysis method was Structural Equation Modeling (SEM). Results: The study results showed that mother-child interaction had a direct effect on the child's sleeping hours. Children's smart media use also directly influenced the child's sleeping hours. In regard to mediation, the results revealed that children's smart media use mediated the relationship between mother-child interaction and child's sleeping hours. Conclusion/Implications: Bidirectional mother-child interaction and the degree of smart media use played an important role in children's sleeping hours. This study suggests policy and practical implications in order to retain children's healthy sleeping hours.

• Wind and Structures
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• 제22권3호
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• pp.349-368
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• 2016

A preconditioning technique is presented for a simultaneous solution to wind-membrane interaction. In the simultaneous equations, a linear elastic model was employed to deal with the fluid-structure data transfer at the interface. A Lagrange multiplier was introduced to impose the specified boundary conditions at the interface and strongly coupled simultaneous equations are derived after space and time discretization. An initial linear elastic model preconditioner and modified one were derived by treating the linearized elastic model equation as a saddle point problem, respectively. Accordingly, initial and modified fluid-structure interaction (FSI) preconditioner for the simultaneous equations were derived based on the initial and modified linear elastic model preconditioners, respectively. Wind-membrane interaction analysis by the proposed preconditioners, for two and three dimensional membranous structures respectively, was performed. Comparison was made between the performance of initial and modified preconditioners by comparing parameters such as iteration numbers, relative residuals and convergence in FSI computation. The results show that the proposed preconditioning technique greatly improves calculation accuracy and efficiency. The priority of the modified FSI preconditioner is verified. The proposed preconditioning technique provides an efficient solution procedure and paves the way for practical application of simultaneous solution for wind-structure interaction computation.

• Computers and Concrete
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• 제19권5호
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• pp.545-553
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• 2017

In the authors' previous study, an axial force-flexural moment (P-M) interaction curve model was proposed to evaluate fire-resisting performances of reinforced concrete (RC) column members. The proposed method appeared to properly consider the axial and flexural strength degradations including the secondary moment effects in RC columns due to fire damage. However, the detailed P-M interaction curve model proposed in the authors' previous study requires somewhat complex computational procedures and iterative calculations, which makes it difficult to be used for practical design in its current form. Thus, the aim of this study was to develop a simplified P-M interaction curve model of RC columns exposed to fire considering the effects of fire damage on the material performances and magnitudes of secondary moments. The simplified P-M interaction model proposed in this study was verified using 66 column fire test results collected from literature, and the verification results showed that the proposed simplified method can provide an adequate analysis accuracy of the failure loads and fire-resisting times of the RC column specimens.

• 정보처리학회논문지D
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• 제9D권1호
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• pp.65-74
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• 2002

이 논문에서는 소프트웨어 부품이 되는 컴포넌트를 설계하기 위한 요소 중 컴포넌트간 상호작용에 중점을 두어 이를 체계적으로 분류한 후, 이에 맞는 도해적 표기방법(graphical notation)과 이를 이용한 설계 방법을 제시하고 실제 설계 사례를 통해 이를 검증하며, 컴포넌트 설계 및 모델링을 효과적으로 표현할 수 있는 방법에 대해 논의하였다. 컴포넌트는 일반 클래스와는 달리 그 규모가 크며 인터페이스와 이를 이용한 컴포넌트간의 상호작용에 대한 표현이 매우 부족하다. 따라서 이 연구에서는 컴포넌트 표현기법을 제시하기 위하여 UML을 확장하였고 이를 이용하여 실험적으로 설계해 보고 그 효용성을 검토하였다.

• 대한인간공학회지
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• 제31권4호
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• pp.557-565
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• 2012

Objective: This paper focuses on the new trend of applying NUI(natural user interface) such as gesture interaction into television and investigates on the design improvement needed in application. The intention is to find better design direction of NUI on television context, which will contribute to making new features and behavioral changes occurring in next-generation television more practically usable and meaningful use experience elements. Background: Traditional television is rapidly evolving into next-generation television thanks to the influence of "smartness" from mobile domain. A number of new features and behavioral changes occurred from such evolution are on their way to be characterized as the new experience elements of next-generation television. Method: A series of expert review by television UX professionals based on AHP (Analytic Hierarchy Process) was conducted to check on the "relative appropriateness" of applying gesture interaction to a number of selected television user experience scenarios. Conclusion: It is critical not to indiscriminately apply new interaction techniques like gesture into television. It may be effective in demonstrating new technology but generally results in poor user experience. It is imperative to conduct consistent validation of its practical appropriateness in real context. Application: The research will be helpful in applying gesture interaction in next-generation television to bring optimal user experience in.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제15권5호
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• pp.1630-1648
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• 2021

Owing to the unprecedented COVID-19 pandemic, the pharmaceutical industry has attracted considerable attention, spurred by the widespread expectation of vaccine development. In this study, we collect relevant topics from news articles related to COVID-19 and explore their links with two South Korean pharmaceutical indices, the Drug and Medicine index of the Korea Composite Stock Price Index (KOSPI) and the Korean Securities Dealers Automated Quotations (KOSDAQ) Pharmaceutical index. We use generalized Dirichlet-multinomial regression (g-DMR) to reveal the dynamic topic distributions over metadata of index values. The results of our analysis, obtained using g-DMR, reveal that a greater focus on specific news topics has a significant relationship with fluctuations in the indices. We also provide practical and theoretical implications based on this analysis.

• 대한치과의사협회지
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• 제57권10호
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• pp.595-604
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• 2019

Each college of dentistry in Korea is examining and reorganizing its own curriculum to prepare students for the practical examination of the National Dental Licensing Examination. Conducting an assessment of students' competency of communication skills with standardized patients is the first attempt for the examination. Yonsei University College of Dentistry carried out the evaluation of communication attitude, communication written exam, and communication skills practice with standardized patients for Third year predoctoral students. The purpose of this study is a) to find out the relationship between the variables measured in communication skills education and b) to make a new basis for the application of communication education and evaluation in dentistry. Based on the results of the study, the following suggestions for the operation of a dental communication curriculum can be drawn: First, the communication classes and the practice with standardized patients should be based on the wide support of the school. In addition, the patient-dentist interaction (PDI) should be practiced in the same way as practically possible by predoctoral students. Moreover, a space is required to allow predoctoral students to practice PDI. Second, the communication score given by the standardized patients was the most influential on the total score of PDI. This indicates that the communication practice with the standardized patients for the practical examination of the National Dental Licensing Examination is a meaningful process in the course of its communication education.

• 실천공학교육논문지
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• 제13권2호
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• pp.405-419
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• 2021

본 연구는 공학계열 대학생을 대상으로 학습민첩성과 취업준비행동의 관계에서 학습몰입과 교수-학생 간 상호작용의 조절된 조절효과를 확인하는 것을 목적으로 한다. 이를 위해 2년제 P대학 2학년 재학생 206명으로부터 수집한 데이터를 바탕으로 Process v3.5.3 for SPSS를 활용하여 연구 모델의 조건부 효과(직접효과 및 조절된 조절효과) 분석을 실시하였다. 연구결과 첫째, 공학계열 대학생의 학습민첩성은 취업준비행동에 유의한 정적 영향을 미치는 것으로 나타났다. 둘째, 학습민첩성과 취업준비행동의 관계에서 학습몰입은 유의한 부적 조절효과가 존재하는 것으로 나타났다. 셋째, 학습민첩성과 취업준비행동 관계에서 학습몰입의 조절효과는 교수-학생 간 상호작용 빈도에 의해 조절되고, 그 영향은 통계적으로 유의하고 정적인 것으로 나타났다. 연구결과를 바탕으로 학문적·실무적 논의와 시사점을 제시하였다.

• 디지털콘텐츠학회 논문지
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• 제18권7호
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• pp.1293-1301
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• 2017

최근 핵가족화, 개인화 등과 같은 사회구조 변화로 개인 및 사회적 문제가 대두되고 있으며, 부정적 감정 증폭으로 인해 다양한 문제의 원인이 되기도 한다. 과거에 심리적 안정감을 주는 가족 구성원의 부재는 현대인의 감정적 어려움의 대표적인 원인으로 꼽을 수 있다. 이러한 개인 및 사회적 문제를 일상생활에서 사용자와 교감하는 컴패니언 로봇의 공감 인터랙션을 통해 해결하고자 한다. 본 연구에서는 감성 로봇 프로토타입 제작을 통해 정교한 공감 인터랙션 디자인을 하였으며, 실험을 통해 연구를 진행하였다. 그 결과로 감성 로봇의 공감 인터랙션에 얼굴 인터랙션이 크게 영향을 미치며, 부정 감성에서 인터랙션이 로봇의 공감도를 높이는 것을 확인할 수 있었다. 결과적으로 본 연구는 감성 로봇을 제작하여 더욱 정교한 인터랙션을 구현하였다는 점과, 실험 결과를 바탕으로 로봇의 공감 인터랙션 디자인 가이드라인을 제시하였다는 점에서 이론적 및 실용적 의의가 있다.

• 한국자동차공학회논문집
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• 제14권6호
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• pp.171-178
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• 2006

The performance in the practical combustion system including reciprocating engines and gas turbine combustors is being much governed by turbulent reacting flow that is often analyzed by both a laminar flamelets concept and flame interaction. The characteristics of laminar flame interaction have been investigated numerically to provide basic understanding of wrinkled turbulent flames under concentration interaction resulting from inhomogeneity in fuel-air mixing, especially focused on the transition of flame characteristics such as diffusion flame, partially premixed diffusion flame, and triple-layer flame by the variation in the degree of premixedness. The extinction stretch rates to the premixedness have also been obtained in this paper. The boundary defining the regime of the existence of triple-layer flames as functions of both stretch rate and premixedness has been determined which agrees well with previously reported experiment measuring OH radical concentration peaks based on PLIF.