• Aerospace Engineering and Technology
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• v.2 no.2
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• pp.124-132
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• 2003

This paper described the structural design and the fabrication procedure of KSR-III composite pressure tank. The type of the composite pressure tank was COPV(Composite Overwrapped Pressure Vessel). A non-load sharing liner was made of aluminum 6061-0 and the liner provided a helium gas seal. The composite pressure tank was winded using T700 carbon/epoxy on the liner. Because the aluminum liner was thin, multiple cure cycles were applied to the filament winding technique. The multiple cure cycles prevented the liner-cylinder from losing a circular shape. A fitting force at the metallic boss was spread to the carbon fiber by a boss ring. The boss ring also prevented a local deformation at the boss part.

• Journal of the Korean Society for Nondestructive Testing
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• v.34 no.4
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• pp.305-310
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• 2014

In this study, a non-destructive evaluation (NDE) mothod is proposed for ball bearings contaminated with micro foreign substances, which were inserted into a ball bearing to create a defective specimen. The non-contact quantitative infrared thermographic technique was applied for NDE condition monitoring. Passive thermographic experiments were conducted to perform early fault diagnosis, for bearings operated at optimized torque status under a dynamic load condition. The temperature profiles for normal and defective specimens were quantitatively compared, and the thermographic data analyzed. Based on the NDE results, the temperature characteristics and abnormal fault detection of the ball bearing were quantitatively analyzed according to the rise in temperature.

• The Inventors News
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• no.45
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• pp.1-16
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• 2006

'2006 여성발명 창의교실' 첫 수료식 개최/2006 대한민국 여성발명품 박람회/제12회 여성발명 우수사례 발표회/신세대 인터넷 용어, 상표 출원 증가/독창성가진 화투, 특허품으로 인정/대학 강의실에도 특허 열풍 분다/차세대 분자전자 메모리 특허 증가/교통카드 특허 이용료 협상 골머리/국제지식재산연수원, WIPO 공식 연수기관 지정/PCT, 국내단계 진입기간 31개월까지로 연장/직무발명 보상에 대한 길 더 넓어져/특허.실용신안, 권리 강화 되다/'특허행정체험단' 통해 고객 감동 실현/신규 발명교실 설치 계획 안내/사랑 확인해 주는 '연인의 잔' 발명/'무공해 플라스틱'으로 환경 사랑 나선다/중국, R&D 기지로 급부상하다/특허출원 실적, 대학별 빈부 격차 심해져/삼성,SDI,OLED 특허 출원 세계 최다/한국여성발명협회, 홈페이지 전면 개편/특허청, 국방과학연구소와 업무협력협정 체결/브랜드 경영 열풍, 지자체에도 분다/'DMB 기술표준과 전략적 특허분석' 발간/지렁이로 화장품, 비누 발명/건강 상식/시중 은행, 월드컵 미끼상품 못판다/역사 속의 발명품/하루 10문 발명교실/특허Q&A/조정숙 코코허브 대표/수원 매현중학교 발명교실/파마머리 발명, 올해로 1백주년/아이디어 착상 및 발명 기법/창의성은 우리의 밥줄이다/야마모토의 추잉껌/PSP진동기술 특허소송 소니패배/내셔널반도체, 특허 장난꾼 잡는다/특허청, '제7회 반도체 설계 공모전' 개최/KAIST 학생들, 특허청에서 '연구노트' 작성법 전수/특허법원, 전국법원 중 처음으로 구술변론 도입/한국여성발명협회 회원사 발명품 가이드/'2006 전국 발명표어 공모대회' 공고

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.6
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• pp.3423-3428
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• 2014

Numerical studies were performed to evaluate the structural safety of a greenhouse under both snow and wind loads. In the case of a wind load, fluid-structure interaction (FSI) method was used to consider the local pressure distributions on the greenhouse-induced by aerodynamic characteristics. The results showed that the maximum stress and deformation occur near the junction of pipe supports and rafters of the roof, where connecting clips are installed. Moreover, the wind load is a more severe condition than a snow load. Overall, these results will be used to design a prefabricated connecting clip with easy installation and low maintenance.

• The Inventors News
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• no.44
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• pp.1-16
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• 2006

한국여성발명협회,제7회 정기총회 개최/2006 대한민국 여성발명품 박람회/제12회 여성발명 우수사례 발표회/새롭게 바뀐 특허분류, 무엇이 달라졌나/해외 특허, 3월부터 무료로 검색 서비스/'디자인 등록증' 취업에 필수 요소 되다/전상우 특허청장 취임식 갖다/인라인 스케이트에도 특허 열풍/김종갑 전 특허청장, 산자부 제 1차관에 임명/공익변리사에게 무료 특허상담 받으세요/전상우 특허청장, 2006년 업무계획 발표/'제41회 발명의 날' 포상계획 공고/특허기술동향조사 확대/상표 불사용 취소심판 제도 개선/한국특허정보원, 한양대학교와 업무협약 체결/담배 상표, 다등록업체 1위KT&G/계절 관련 상표 출원, '봄'을 가장 선호/사회적 취약 계층, 심판.소송 비용 지원/국제문화대학원대학교,'국제 특허.경영학, 통해 전문가 과정 양성/'2006 대한민국 특허기술 이전박람회' 신청 접수/산업재산권분쟁조정 효력, '재판상 화해'로 강화/점차 늘고 있는 '유방암' 자가 진단법/'태국 발명가의 날 전시회' 한국발명진흥회 참가/'상표 판결문 요지집' 발간/역사 속의 발명품/하루 10분 발명교실/특허Q&A/'신뢰와 성실로 지식재산의 권리화를 돕겠습니다'/설봉초등학교 발명교실/아이디어 착상 및 발명 기법/사업화 지원 제도를 제대로 활용하려면/손님의 주문으로 만든 다니의 단팥죽/일본과 유럽, 브라질 디지털 방송 쟁탈전/미국, 도요타 흔들기 나섰다/새집증후군, 시스템 환기로 줄인다/공무원이 대나무로 분뇨 구린내 잡았다/획기적인 '기능성 목발' 탄생/발광 현수막, 눈에 띄네/리빙 아이디어/특허기술평가수수료 지원/한국여성발명협회 회원사 발명품 가이드

• The Inventors News
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• no.46
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• pp.1-16
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• 2006

'2006 대한민국 여성 발명품 박람회' 개최/'발명의 달 5월' 행사 풍성히 열려/'제12회 여성발명 우수사례 발표회' 열려/;꽃꽃이 용기' 출원동향 급격히 늘어나/특허청 '소멸특허정보 서비스' 제공한다/김열 특허청 차장 승진 임명/BM 특허 출원, 개인은 줄고 기업은 늘고/5월부터 특허료, 우선심사신청료 인하/현장 스케치/특허청과 한국전력 기술.특허정보 공유 양해각서 체결/독일과 '장미전쟁', 한국 승리/'제34회 제네바 국제발명전'에서 전원 수상 기록/국제 특허 전문가 한 자리에 모였다/특허청, 해외지재권 침해 소송비용 지원/국가연구 개발사업 지원하는 'R&D 특허센터' 출범/'특허 고객 고층 해결 안방 서비스' 개시/한국특허정보원, 다양한 캠페인 통해 사회공헌 활동/특허청, 과학기술 전문인력 50명 특별채용/'특허기술이전 박람회' 개최/취업 위해 일본 기업에 IT특허 기술 유출/부조리 신고자에 포상금 지급/역사 속의 발명품/하루 10분 발명교실/특허Q&A/'주부에서 발명가로, 필요에 의해 발병이 시작됐습니다'/여주초등학교 발명교실/아이디어 착상 및 발명 기법/여성 발명 활동 더욱 장려해야/무리에의 마가린/세계 상표제도 더욱 가까워져/특허청,'아시아 특허정보 허브'로 급부상/'2006 발명 특허 페스티벌' 개최/지리적 명칭, 신문제호 상표등록 안된다/리빙 아이디어/특허기술사업화에 3천89척원 지원/'찾아가는 심사 서비스' 대리인 사무소까지 확대/문화콘텐츠 식별체계 첫 선 보여/한국여성발명협회 회원사 발명품 가이드/

• Journal of the Korean Society of Propulsion Engineers
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• v.20 no.6
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• pp.29-37
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• 2016

This paper proposes a shape optimization of the metal boss for a composite motor case using finite element analysis. For the structural safety and the weight reduction of the composite motor case, under the internal pressure, the fiber stress in the dome area and the tightening bolt stress are constrained and the boss weight is set to objective function, respectively. The response surface models are constructed for the performance characteristics by using response surface method. The significance of the design variables about the performance characteristics is evaluated through the ANOVA(analysis of variance) and the goodness of fit test for the constructed model is performed through the regression analysis. The SQP(sequential quadratic programming) algorithm is used for the optimization and the proposed method is verified by performing structural analysis for the optimum shape.

• Journal of the Korea Convergence Society
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• v.10 no.11
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• pp.327-333
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• 2019

The Fuel-cut driving is started when the acceleration pedal released with transmission gear engaged. Fuel economy of the vehicle improves by active fuel-cut driving. A deep-learning technique is proposed to predict fuel-cut driving with vehicle speed, acceleration and road gradient data in the study. It's 3~10 of hidden layers and 10~20 of variables and is applied to the 9600 data obtained in the test driving of a vehicle in the road of 12km. Its accuracy is about 84.5% with 10 variables, 7 hidden layers and Relu as activation function. Its error is regarded from the fact that the change rate of input data is higher than the rate of fuel consumption data. Therefore the accuracy can be better by the normalizing process of input data. It's unnecessary to get the signal of vehicle injector or OBD, and a deep-learning technique applied to the data to be got easily, like GPS. It can contribute to eco-drive for the computing time small.

• Journal of Intelligence and Information Systems
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• v.8 no.1
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• pp.103-117
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• 2002

Recently, many researchers have developed applications for automated contract and negotiation using agent technologies on electronic commerce. Especially, they have tried to study negotiation mechanism applying agent instead of buyers and sellers. Traditional researches, however, often had limitations. In the researches of automated negotiation, the agents had to negotiate with the other agents for a simple negotiation issue because the mechanisms were naive. In the researches of negotiation by user interaction, the agents did not have supported the procedures and methodologies for making the automated negotiation but only supported the users by providing communication environment during the negotiation process by users. In this paper, we propose efficient negotiation model using the modified negotiation model of the game theory. In the proposed model, the agents negotiate automatically with the partner agent and make good benefits by the strategic method during the negotiation process. Each agent makes negotiation issues with user's requirements and exchanges its suggestion alternatively in each step of the negotiation process. The agent evaluates degree of satisfaction for the opposite's suggestion and uses it in the next step of suggestion. To find out the negotiation strategies of opposite side, the agent uses teaming by weights of issues. As a result, the agent improves each own benefits for the contract and reduces the unbalance of its benefits through the proposed negotiation mechanism. We implement the negotiating agents according to the proposed mechanism and prove the efficiency of the proposed model by various experimentation.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.9
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• pp.32-38
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• 2020

Cargo train braking uses the pressure changes in the air braking pipe to operate the braking tightening and releasing service repeatedly. Air-braking release failure means partial braking caused by a failure of the variable load valve after the driver handling the brake release. This phenomenon causes wheel flaws while driving a wagon, resulting in wheel breakage or train derailment. This study developed the air-braking release failure proof valve considering the technical requirements of the railway operation corporations. In addition, a durability test of the valve was carried out using a braking performance simulator, and its operating performance was evaluated from the pneumatic history under cyclic braking conditions. The warranty life of this valve was assessed by performing 160,000 cycles of testing of 12 prototypes in accordance with the zero-failure test method, considering the number of braking cycles while driving the wagon. During the durability test, the pneumatic input time, output time, and release velocity were almost constant. The warranty life of this valve was 59,860 times the 95% confidence level, which means that it can be operated without trouble for four years when the valve is installed in the bogie of the wagon.