Test Study for Preventing Chronic Rattle Noise of Door Trim

Byoungkook Choi(최병국),Seokin Song(송석인),Hyunghyun Na(나형현),Jongsoo Kim(김종수),Heejoong Kim(김희중) 한국소음진동공학회 2015 한국소음진동공학회 학술대회논문집 Vol.2015 No.4

실험계획법을 이용한 효율적인 차량 쏠림 해석 방법 연구

구병국(Byoungkook Koo),이창호(Changho Lee),신영동(Youngdong Shin),조춘택(Choontack Cho) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-

Vehicle pull is one of the most important problem at the initial stage of vehicle development. It is generally known that the vehicle pull is a phenomenon occurred by the residual force and moment. To minimized vehicle pull in this paper introduces the analysis method of vehicle pull simulation which makes it possible to consider matching factors between a vehicle and tires using design of experiments. Therefore, it has analyzed the correlation between factors using ADAMS/CAR S/W including PAC2002 Tire model.

Solution structure and backbone dynamics of the XPC-binding domain of the human DNA repair protein hHR23B

Kim, Byoungkook,Ryu, Kyoung-Seok,Kim, Hyun-Jin,Cho, Sung-Jae,Choi, Byong-Seok BLACKWELL 2005 FEBS JOURNAL Vol.272 No.10

<P>Human cells contain two homologs of the yeast RAD23 protein, hHR23A and hHR23B, which participate in the DNA repair process. hHR23B houses a domain (residues 277–332, called XPCB) that binds specifically and directly to the xeroderma pigmentosum group C protein (XPC) to initiate nucleotide excision repair (NER). This domain shares sequence homology with a heat shock chaperonin-binding motif that is also found in the stress-inducible yeast phosphoprotein STI1. We determined the solution structure of a protein fragment containing amino acids 275–342 of hHR23B (termed XPCB–hHR23B) and compared it with the previously reported solution structures of the corresponding domain of hHR23A. The periodic positioning of proline residues in XPCB–hHR23B produced kinked &agr; helices and assisted in the formation of a compact domain. Although the overall structure of the XPCB domain was similar in both XPCB–hHR23B and XPCB–hHR23A, the N-terminal part (residues 275–283) of XPCB–hHR23B was more flexible than the corresponding part of hHR23A. We tried to infer the characteristics of this flexibility through <SUP>15</SUP>N-relaxation studies. The hydrophobic surface of XPCB–hHR23B, which results from the diverse distribution of N-terminal region, might give rise to the functional pleiotropy observed <I>in vivo</I> for hHR23B, but not for hHR23A.</P>

Dynamic DPA 시뮬레이션을 활용한 자동차 내장 부품 설계 품질 검증 방안에 대한 고찰

최병국(Byoungkook Choi),송병철(Byoungchul Song),장익근(Ikgeun Jang),조현권(Hyunkwon Jo),이용구(Yonggu Lee) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5

Since the software program has been developed rapidly, there have been born a lot of computer aided programs in field of industrial complex for design validation such as CAD, CAE, CAM, DMU, Virtual Manufacturing and so on.. This paper presents case studies of verifying design quality for automotive interior parts by dynamic DPA simulation - as similar as DMU, but a little difference it has. While the static DPA simulation is too limited to verify design quality, the dynamic DPA make it possible to detect design error and dynamic crash between parts more effectively when the products are assembled. We focused on how to make DPA more effective, fast, reliable, quantitative and support to make a decision for designer before the product development period finished. Because of such reasons, we introduced dynamic DPA simulation based on CAE, assembly criteria for valuation, optimization of assembly path. Those make dynamic DPA more effective, fast, and reliable. Through these studies, we could reduce not only simulation verification time, but also improve reliable result for supporting developers.

시각장애인을 위한 적응적 검색 시스템 구현

이병국(ByoungKook Lee),최영미(YoungMee Choi),주문원(MoonWon Choo) 한국멀티미디어학회 2007 한국멀티미디어학회 학술발표논문집 Vol.2007 No.1

이 논문에서는 사각장애인이 웹 상의 정보에 접근하고자 할 때 장애가 되는 요소를 분석하여 별다른 보조 하드웨어나 소프트웨어에 의존하지 않고 텍스트 정보를 적응적으로 검색하는데 요구되는 시스템의 틀을 개발하고자 한다. 특히, 웹 상에서 제공되는 사전을 검색하고자 할 때 발생하는 문제점을 해소하여 음성 안내, 화면의 확대 축소, 화면 색 조합 제공, 음성인식, 단축키 서비스 등을 적응적으로 제공함으로써 사각장애인들의 웹 서비스 접근성을 향상시키고자 한다. 프로토타이핑 결과를 제시한다.

소셜 네트워크 서비스의 연구경향 분석: 국내 Twitter 관련 연구 중심

하병국,Ha, Byoungkook 서비스사이언스학회 2015 서비스연구 Vol.5 No.1

최근, 소셜 네트워크 서비스(Social Network Service)의 도입과 더불어 이를 다양한 목적을 충족시키는 연구가 진행되고 있다. 많은 연구가 진행됨에 따라 연구 경향을 파악하는 것이 필요하다. 하지만 연구의 양이 방대하여 많은 양의 관련 연구 문헌을 조사하는 것은 상당히 어려운 작업이다. 따라서 본 연구에서는 소셜 네트워크 서비스 중 트위터를 중심으로 관련 연구들을 체계적으로 분석하여 연구의 경향성을 밝힌다. 특히 체계적인 문헌 조사와 분석을 위해 SLR(Systematic Literature Review) 기법을 이용한다. 그리고 국내 연구를 중심으로 243편을 조사 하였다. 다양한 분야의 학문을 살펴보기 위하여 학술 분류 KDC와 기본 연구자들의 관점 그리고 트위터 데이터의 직접 사용 등을 분석차원으로 구성하여 분석하였다. 연구 결과 다양한 학문에서 트위터를 분석 하고 있으며 그 방법 또한 단순 설문을 넘어 트위터 데이터를 직접 사용하는 연구가 많았다. Recently, with the introduction of social network services, studies that try to make use of them for the various purposes have been actively investigated. In order to proceed with the research that takes advantage of social network services, it is necessary to review the relevant literature and to identify trends in researches. However, the researches of social network are massive amount, so to review the huge amount of relevant research literature is a very difficult task. Therefore, in this study, we analyze systematically the tendency of research related to social network service focusing on Twitter. Especially, we use the SLR (Systematic Literature Review) technique for systematic literature survey and analysis. For the literature survey, we select korean literature resource sites and 243 studies of literature that are surveyed. Studies and analyzes on Twitter in a variety of research studies were also using Twitter data that way beyond the simple question directly.

변동부하 환경에서 시스템에어컨 성능 및 에너지 시뮬레이션

엄철준(Chuljun Um),김병국(Byoungkook Kim),구병기(Andrew Ku),박찬호(Charles H. Park),김태헌(Taehun Kim),이재효(Jaehyo Lee) 대한설비공학회 2015 대한설비공학회 학술발표대회논문집 Vol.2015 No.6

Haptoglobin Concentration in the Cord Blood of Uninfected Korean Newborns

( Seong Jin Choi ),( Byoungkook Lee ),( Kwangjin Ahn ),( Young Uh ) 대한주산의학회 2018 Perinatology Vol.29 No.4

Objective: Highly sensitive haptoglobin measurement should be used in neonates because the haptoglobin concentration in neonates is lower than that of adults. The aim of this study was to establish the reference values of haptoglobin levels in the cord blood of uninfected neonates. Methods: The cord blood of 29 preterm and 51 term babies was collected, and data from the mother and the newborn were recorded. The haptoglobin concentrations of 80 cord blood samples were simultaneously measured by enzyme-linked immunosorbent assay (ELISA; Assaypro, St Charles, MO, USA) and immunoturbidimetry assay (Roche Diagnostics, Basel, Switzerland). C-reactive protein (CRP) was also measured by immunoturbidimetry assay (Roche Diagnostics, Switzerland). Results: Mean values of CRP and ELISA haptoglobin were not significantly different between preterm and term babies. The 2.5 percentile and 97.5 percentile values of ELISA haptoglobin concentration were as follows: 80 neonates, 0.01 mg/dL and 0.59 mg/dL; 29 preterm babies, 0.08 mg/dL and 0.18 mg/dL; and 51 term babies, 0.07 mg/dL and 0.23 mg/dL. There were no differences in ELISA haptoglobin concentration according to maternal underlying diseases, delivery method, usage of antibiotics or steroids before delivery, gestational age, gender of baby, or twin gestation. Conclusion: A highly sensitive haptoglobin method should be used to determine the haptoglobin concentration in Korean newborns because the reference values of cord blood haptoglobin concentration in Korean newborns are less than the lower detection limit for commonly used immunoturbidimetric haptoglobin measurement methods.

SNS 정보 품질이 고객 충성도에 미치는 영향: 신뢰의 매개된 조절효과를 중심으로

박원희,하병국,Park, Wonhee,Ha, ByoungKook 서비스사이언스학회 2014 서비스연구 Vol.4 No.1

소셜네트워크서비스(SNS)를 활용하여 다양한 커뮤니티활동 및 정보 공유와 인적 네트워크를 형성해 나가는 일들이 많아지고 있다. 마케팅 관점에서 SNS는 기업과 소비자의 새로운 의사소통의 창이며 비즈니스의 새로운 기회이다. 그리하여 많은 기업들이 SNS를 이용한 마케팅 활동을 펼치고 있다. H. A. Simon은 의사결정을 위한 자료수집의 어려움을 시간과 비용의 한계 때문에 모든 정보를 수집할 수 없으므로 제한된 합리성(bounded rationality) 내에서 의사결정을 하는 것이 효율적이라고 하였다. 이때, 정보제공 자 또는 정보에 대한 신뢰가 있다면 고객은 빠르게 의사결정을 할 수 있을 것이며, 자신의 선택에 대한 만족도가 높아질 것이다. 따라서 본 연구에서는 SNS를 활용한 기업의 마케팅에서 고객의 신뢰가 어떻게 작용하는지 매개모형에서 신뢰라는 조건이 어떻게 작용하는지 살펴보고 이를 실증함으로써, 이론적으로는 좀 더 엄격한 매개된 조절효과에 대한 실증방법론을 도입하는 것이며, 실무적으로는 SNS 정보 품질이 성과변수, 즉 고객 만족 및 충성도에 미치는 직 간접적인 효과에 신뢰의 역할을 재조명하는 것이다. 이로써 이 결과를 이용하는 기업이 SNS를 이용하여 마케팅 전략을 수립할 때 필요한 전략적 도구가 되고자 한다. Many people have a social network service (SNS) by utilizing a variety of community activities, information sharing, and the creation of social networking. In terms of marketing academics view social networks between businesses and consumers in the new communication strategy, a new way to make them in terms of marketing a new business opportunity. That is, they are actively engaged in the various marketing activities targeting customers using SNS. According to H. A. Simon's needle theory, it is efficient to make a decision within the bounded rationality due to the difficulty of collecting data in decision-making as well as the inability to collect all information because of limited time and money. If the information or the informant can be trusted, the customers would be able to make a quick decision and get higher satisfaction from it. Therefore, this study examines and thereby empirically demonstrates what role customers' trust plays in a company's marketing using SNS by exploring how trust condition works in the mediated model and, theoretically, intends to introduce an empirical methodology on more strictly mediated moderating effects and, in practice, revisit the role of trust on direct and indirect effect the SNS's Information quality has on the performance variables such as customer satisfaction and loyalty. This study thereby aims to provide a strategic tool for the companies that plan to use the SNS in developing marketing strategies.

블록 강성의 예측 방법과 타이어 패턴 설계 적용에 관한 연구

김성래(Seongrae Kim),성기득(Kideug Sung),구병국(Byoungkook Koo),조춘택(Choontack Cho) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-

Pattern shape on the tire is one of the most interested area for the tire designer, because it is important component which is related with a lot of performances and also should arouse customer's interest. Especially, the behaviour of tread pattern block is one of basic reference that estimates wear performance, breaking performance, and cornering performance, etc. To estimate this behaviour of pattern block, block stiffness values have often used in the pattern shape design step. In this study, numerical and analytical approach are introduced and compared to estimate block stiffness of pattern, and we study on the method to apply block stiffness to pattern shape design. And by applying this method to simple pattern block, we investigate the relation between block stiffness and tire stiffness by tread pattern.