가상반복법을 이용한 가상 시험기 입력 하중 산출에 대한 연구

류승훈(Seunghun Ryu),송자상(Jasang Song),박종찬(Jongchan Park),임정환(Jung hwan Lim) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11

This paper discusses Virtual Iteration Method (VIM) using Virtual Test Lab (VTL) to reproduce physical test to the proving ground. In general, VTL using Finite Element Model (FEM) and Multi Body Dynamics (MBD) Model is capable to describe nearly all physical behavior of complex vehicles. But, Many MBD models contain uncertain parameters like a stiffness and damping of bushings that reduce accuracy. With the help of VIM it is possible to compensate for these imperfections and to improve the output quality for fatigue life prediction. the number of company adopting CAE to obtain initial design guide line has increased. But, it is so difficult to estimate durability performance using a fatigue analysis in initial stage of a vehicle development. This paper proposes methods to evaluate durability in early design stage. That is the suggestion of strength criterion to satisfy target life using the damages calculated from the load history only before the initial decision of design shapes. Through a series of these processes, load conditions and allowable stress to be able to estimate the durability performances are calculated using static strength analysis in the initial design.

민감도 해석과 다꾸지 기법을 이용한 대형트럭 캡의 Front Structure 최적화에 관한 연구

류승훈(Seunghun Ryu),최균(Kyoon Choi) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-

Recently, the size of Shock Absorber and air spring is enlarged to improve ride quality. Consequently, a location of front Cab mounting system is changed from under frame to front of dash board panel. In this paper, The goal is to improve strength and stiffness according to change of load point. For the optimization of design parameters in large-sized truck Cab system are used sensitivity analysis and Taguchi method which is one of the robust design methods. In order to obtain the best combination of each control factor, the dynamic and the norminal s-best type characteristic parameter method are used for the strength and stiffness output response. In this paper, eight control factors which are determinated according to sensitivity analysis are used for analysis; one with two levels and seven with three level combinations comprising the design of the L₁?(2¹X3?) orthogonal array. With this optimal design, The result of torsional test shows that strength is improved by 15% and the static stiffness increased by 30%.

근단 누화의 저감을 위한 노치 라우팅의 신호 무결성 분석

류승훈(Seunghun Ryu),김현웅(Hyunwoong Kim),이성희(Seonghi Lee),이상욱(Sanguk Lee),안승영(Seungyoung Ahn) 대한전자공학회 2023 대한전자공학회 학술대회 Vol.2023 No.6

설계초기단계의 상용차 하중 조건 설정에 대한 연구

류승훈(Seunghun Ryu),우호길(Hokil, Woo),문지훈(Jihoon, Moon),박종찬(Jongchan Park),임정환(Jung hwan Lim) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2007 No.11

가정 내 부유 진균의 농도와 관련 요인

조용민,류승훈,최민석,서성철,정지태,최재욱,Cho, YongMin,Ryu, SeungHun,Choi, Min Seok,Seo, SungChul,Choung, Ji Tae,Choi, Jae Wook 한국환경보건학회 2013 한국환경보건학회지 Vol.39 No.5

Objectives: This study was performed in order to determine airborne fungi levels in homes and find related factors that may affect airborne fungi concentration. Methods: Fifty homes were study subjects for measuring airborne fungi. For sampling airborne fungi, the impaction method on agar plates was used and samples were counted as colony forming units per cubic meter of air ($CFU/m^3$). In addition, information regarding housing characteristics and atopic disease in each home were collected via questionnaire. Results: The geometric means (GM) of airborne fungi concentrations in fifty living rooms and bedrooms were 68.03 and 62.93 $CFU/m^3$, respectively. The GM of airborne fungi concentration in atopy homes was 78.42 $CFU/m^3$. This was higher than non-atopy homes' 54.34 $CFU/m^3$ (p-value=0.051). In the results of the multiple regression analysis, outdoor airborne fungal concentration proved a strong effective factor on indoor airborne fungal concentration. Also, construction year, floor area of house, indoor smoking and frequency of ventilation were factors that showed a significant association with indoor airborne fungi concentration. Conclusions: The results of this study show that some housing and living characteristics may affect the development and increase of airborne fungi. In addition, exposure to airborne fungi may be a risk factor for the prevalence of childhood atopic diseases.

지방자치단체 중심의 아토피 예방관리 프로그램 효과 평가

서성철,조용민,류승훈,이승길,이지연,정지태,Seo, SungChul,Cho, YongMin,Ryu, SeungHun,Lee, Seung Kil,Lee, Ji Yeon,Choung, Ji Tae 한국환경보건학회 2013 한국환경보건학회지 Vol.39 No.4

Objectives: We evaluated the effects of an allergy control program on children with atopic dermatitis (AD) in five schools located within Gyeonggi-do. Methods: Based on the results of the 12-month prevalence of AD symptoms from an International Study of Asthma and Allergies in Childhood (ISAAC) questionnaire of all students (n=2109; 1040 boys, 1069 girls) at five randomly selected schools, 227 students with AD symptoms were screened. Finally, 188 students with greater than 1 on SCORAD (SCORing Atopic Dermatitis) determined by a physician were selected. The allergy control program includes education related to allergic diseases, skin prick tests, and SCORAD evaluation, as well as keeping a daily journal to check the usage of moisturizer at least once a day. To determine the effectiveness of the allergy control program, SCORAD evaluation was performed again six weeks later. Results: The most common symptom for 12-month prevalence was rhinorrhea (33.9%), followed by atopic skin lesions (14.8%) and wheezing (4.0%). The 12-month prevalences of the three allergic diseases were higher for boys than for girls, and a significant difference was found for allergic rhinitis (P<0.001). The mean SCORAD index decreased significantly from 26.1 to 17.5 after the completion of the six-week control program (P<0.01). In particular, these differences were more pronounced for the group which used the daily journal (P<0.001). Conclusions: Our findings indicate that the allergy control program including usage of a daily journal as well as regular monitoring could be a promising tool for preventing and alleviating the symptoms of allergic diseases.

모바일용 메모리에서 멀티드롭 토폴로지의 반사를 줄이기 위한 와이어 본딩 핑거 커패시턴스의 신호 무결성 분석

김현웅(Hyunwoong Kim),류승훈(Seunghun Ryu),안승영(Seungyoung Ahn) 대한전자공학회 2023 대한전자공학회 학술대회 Vol.2023 No.6

고속버스 스윙도어의 최적설계

김종민(Jongmin Kim),류승훈(Seunghun Ryu) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2007 No.11

해석적 방법을 통한 고무 Bush 류의 강성 피로수명 평가 연구

장홍석(Hongsuk Chang),류승훈(Seunghun Ryu),박종찬(Jongchan Park) 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-

독일 부정경쟁방지법이 우리 법제에 주는 시사점

김완태(Kim Wan-Tae),류승훈(Ryu Seunghun) 원광대학교 법학연구소 2021 圓光法學 Vol.37 No.2

우리나라 부정경쟁방지 및 영업비밀보호에 관한 법률은 자유경제질서의 핵심 기반인 경쟁이 불법행위 없이 시장참가자를 보호하면서 정의롭게 이루어질 수 있도록 규율해야 한다. 따라서 동법은 시장참가자의 경제행위 자유와 소비자의 선택 자유 및 결정의 자유를 훼손하지 않기 위해 장식적으로 기능하는 법 대신 시장경제질서 규율을 기반으로 시장참가자를 보호하는 실질적인 법률로 기능해야 할 것이다. 이를 위해 부정경쟁방지법의 분석을 토대로 도출한 부정경쟁방지 및 영업비밀보호에 관한 법률의 입법 개선을 위한 시사점은 다음과 같다. 먼저, 우리나라 시장경제의 구조적 부정경쟁과 거래의 부정경쟁을 방지하기 위해서 부정경쟁방지법의 일반규정인 기업의 주의의무에 관한 규정과 소비자 보호에 대한 규정, 법률효과로서 다양한 청구권과 형벌규정 및 벌금규정을 도입하여 시장참가자의 속성을 가진 소비자도 보호해야 한다. 둘째로, 기업이 시장참가자를 대상으로 하는 영업행위에 있어서 주의의무를 해태하고, 시장참가자에게 근본적 영향을 미치는 부정경쟁행위가 발생할 경우 부정경쟁행위라는 근본적인 영향으로부터 시장참가자를 신속하게 보호해야 한다. 이를 위해서 부정경쟁방지법의 일반적 규정(제4a조 공격적 영업행위, 제5조 오인유발 영업행위, 제5a조 부작위에 의한 오인유발, 제6조 비교 광고, 제7조 부당한 방법으로 괴롭힘: 이하 부당한 방법으로 부담을 주는 행위) 도입, 법률효과 규정(제8조 제거와 부작위, 제8a조 유럽지침 2019/1150 위반시 청구권자, 제8b 질 높은 경제단체의 리스트, 제8c조 청구의 남용관철 금지: 책임, 제9조 손해배상, 제10조 이윤환수, 제11조 시효)에 의한 소비자단체의 청구권 인정과 부칙 도입을 고려해야 한다. 셋째로, 소비자보호를 위해 경쟁자, 경제인단체, 소비자단체, 상공회의소 등의 청구권의 적용범위를 확대할 필요가 있다. 넷째로, 부정경쟁행위 근절을 위해 효과적이지 못한 과태료 규정의 개정보다는 손해배상이나 금지명령을 강화하면서 형벌규정과 벌금규정을 강화하여 부정경쟁행위에 대해 더 이상 관용이 없음을 보여줘야 한다. 마지막으로, 부정경쟁방지 및 영업비밀보호에 관한 법률은 어떠한 경우가 부정경쟁행위의 구성요건에 속하는지를 보다 더 명확하게 규정하기 위해서 부정경쟁방지법의 구성요건 내용을 면밀히 살펴보고 이를 명확하게 적용하여 관련 법률의 구성요건을 보다 구체화해야 한다. The Law to Prevent Unfair Competition and Protect Trade Secrets in Korea (KoUWG) should be designed in such a way that competition can be justified as the core of the free economic order, while market participants are protected without illegal activity. Therefore, the law provides for the prevention of actual unfair competition and the protection of trade secrets in order to protect market participants on the basis of a market economy discipline, instead of a decorative function that does not impair the freedom of choice of market participants. The implications of this study are as follows. First, in order to prevent unfair competition and structural unfair competition in the Korean market economy, it is necessary to comply with the provisions of the general obligation of the German Unfair Competition Prevention Act. The introduction of regulations is also intended to protect consumers with the characteristics of market participants. Second, if an entity fails to comply with its obligation to conduct business activities targeting market participants and unfair competitive practices arise that have a fundamental impact on market participants, market participants should be protected from the fundamental effects of unfair competition. For this purpose, the right to claims of consumer groups as well as various claims and regulations through the legal consequences of Articles 8 to 11 and the general provisions of the Act against Unfair Competition according to Articles 4a to 7 and the appendix must be taken into account. Thirdly, the various claims of competitors, trade associations, consumer associations, chambers of commerce or the chamber of crafts must be extended to consumer protection. Fourth, it needs to show that there is no tolerance for unfair competitive practices by strengthening penal and administrative fines while strengthening injunctions rather than revising the penalty payments, which are not effective in eliminating unfair competitive practices. Finally, in order to define even more clearly which cases represent unfair competitive behavior, it is necessary to carefully examine and expressly apply the constitutional requirements of the German Competition Prohibition Act. The factual requirements of the law should be further refined.