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GIS 진단시스템의 평가를 위한 PD 모의 펄스발생기 개발에 관한 연구
김성주,장석훈,조국희,Kim, Sungju,Chang, Sughun,Cho, Kook-hee 한국안전학회 2018 한국안전학회지 Vol.33 No.2
The expansion and stable operation of electric power facilities are important factors with development of industrial facilities in modern society. In high-voltage equipment such as GIS, the insulation characteristics may be deterioated by environment-friendly gas adaption and miniaturization. There is also the possibility of accidents due to insulation breakdown due to the deterioration of power facilities. Therefore, it is necessary to extend the diagnosis system to continuously monitor the danger signals of these power equipment and to prevent accidents. Most of the internal defects in the GIS system are conductive particles, floating electrode defects, protrusion defects, and the like. In this case, a partial discharge phenomenon is accompanied. These partial discharge signals occur irregularly and various noise signals are included in the field, so it is difficult to evaluate the reliability in the development of the diagnostic system. In this paper, a study was made on equipment capable of generating a partial discharge simulated signal that can be adjusted in size and frequency to be applied to a diagnostic device by electromagnetic wave detection method. The PD simulated pulse generator consists of a user interface module, a high-voltage charging module, a pulse forming circuit, a voltage sensor and an embedded controller. In order to simulate the partial discharge phenomenon similar to the actual GIS, a discharge cell was designed and fabricated. The application of the prototype pulse generator to the commercialized PD diagnosis module confirmed that it can be used to evaluate the performance of the diagnostic device. It can be used for the development of GIS diagnosis system and performance verification for reliability evaluation.
김성주(Sungju Kim),조무열(Muyeol Cho),최성진(Sungjin Choi),안장모(Jangmo Ahn) 한국자동차공학회 2020 한국자동차공학회 부문종합 학술대회 Vol.2020 No.7
In this paper, we presented a platform that can switch control authority of Autonomous vehicle. For this purpose, the control transition status was defined and the messages and signals were defined and embodied. In addition, in order to simulate the real vehicle confirmation situation of stable control right conversion, scenario confirmation and driving record signal for autonomous vehicle registration were constructed and confirmed. The MRM mode of the presented platform was confirmed to decelerate to a certain speed in the control switching situation or to stably stop the vehicle in the presence of obstacles.
코로나 시기 대학생의 애착 안정성: 성인애착 유형과 정서조절, 어머니의 정서적 가용성을 중심으로 한 단기 종단 연구
김성주(Sungju Kim),정윤경(Yoonkyung Jeong) 한국인간발달학회 2024 人間發達硏究 Vol.31 No.2
애착이 전 생애에 걸쳐 비교적 안정적인 특성을 보이는 동시에 환경에 의해 변화 가능한 구조라는 점에서 애착 안정성의 메커니즘을 밝히는 것은 중요하다. 이에 본 연구에서는 대학생(만 19세 ~24세) 113명을 대상으로 성인애착 유형과 정서조절, 어머니의 정서적 가용성의 관계를 알아보는 단기 종단 연구를 실시하였다. 코로나 팬데믹을 기점으로 2번의 시기에 걸쳐 자기보고식 설문지를 통해 대학생의 성인애착을 측정하고, 정서조절능력, 대인관계불편감, 그리고 어머니의 정서적 가용성과의 관계를 확인하였다. 연구 결과, 코로나 팬데믹 동안 성인애착 안정성을 유지하는 대학생 집단이 그렇지 않은 대학생 집단과 비교하여 낮은 대인관계 불안을 보고하였고, 높은 수준으로 어머니의 정서적 가용성을 경험하고 있는 것으로 나타났다. 본 연구는 성인애착의 안정성과 변화성에 대한 경험적 증거를 축적하고, 국내 대학생을 대상으로 코로나 팬데믹의 영향 하에 청년기 성인애착의 안정성을 종단 연구의 방법으로 확인하였다는 점에서 의의가 있다. Attachment theory focuses on relationships and bonds, particularly long-term. These early bonds, formed during the initial years of life, are not just transient but play a pivotal role in shaping the child's future emotional health and relationships, influencing attachments throughout life. The longitudinal stability of attachment styles, a pivotal aspect of attachment theory, has the potential to change over time as well. Consequently, it is important to examine the underlying assumptions. For these reasons, this study examines the stability and change in attachment styles with a focus on college students(19 ~ 24 years old) using a short-term longitudinal method. Assessments included Adult Attachment Relationships (Questionnaire (RQ), Relationships Scales Questionnaire (RSQ)), Emotion- Regulation Questionnaire (ERQ), Interaction Anxiousness Scale (IAS), and Lum Emotional Availability of Parents (LEAP) measure. The results demonstrated both stability and changes in adult attachment. More importantly, students who maintained a secure attachment style and those who transitioned from insecure attachment to secure attachment experienced higher levels of maternal emotional availability when compared to those maintaining an insecure attachment style. This study is the first attempt to identify stability and change in college students' adult attachment and its relation to interpersonal functioning, and maternal emotional availability. Limitations and suggestions for future research are also discussed.
RSL-Maker를 이용한 OGSA 서비스 설계 및 구현
김성주(Sungju Kim),장태무(Tae Mu. Chang) 한국정보과학회 2004 한국정보과학회 학술발표논문집 Vol.31 No.1A
현재 지역적으로 분산되어 있는 대규모 데이터와 고성능 컴퓨터 자원들을 효과적으로 활용하는 그리드 컴퓨팅 연구가 활성화 되었다. 사용자는 다양한 종류의 수많은 그리드 자원을 그리드 미들웨어인 GT3를 이용하여 일관된 방법으로 이용할 수 있으며, 사용자의 작업을 원격지에서 실행 및 제어할 수 있다. 본 논문에서는 필요성 및 실현 가능한 그리드 컴퓨팅에 대한 관련연구와 GT3를 실행 및 제어하는 관련된 작업을 RSL-Maker를 사용하여 그리드를 이용하는 여러 응용분야의 사용자 누구나 그리드 컴퓨팅을 사용하게 한다. 현재 그리드는 웹의 기술과 접목한 OGSA가 발표되어 많은 연구가 진행되고 있다. 본 연구는 RSLMaker를 이용하여 GT3와 호환성 및 융통성을 통해서 보다 향상된 그리드 웹 서버 서비스를 구현했다.
택시 AEB 시스템 적용을 위한 택시운전자 운전패턴 연구
김수겸(SooKyum Kim),김성주(SungJu Kim),Archana Rathnam 한국자동차공학회 2019 한국자동차공학회 학술대회 및 전시회 Vol.2019 No.11
Taxi drivers have a higher rate of accidents than a general driver. It can be analyzed to the aggressive driving pattern of taxi drivers compared to general drivers. If the FCW system do not take into account the driver`s driving pattern, the FCW can cause inconvenience to the driver. Therefore, in this paper, we decided the FCW operation time condition suitable for taxi driver by analyzing driving pattern of taxi driver and general driver.
한성경(Seongkyung Han),김성주(Sungju Kim),서용기(Younggi Seo),유은지(Eunji Yu),김종렬(Jongryoul Kim) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
Automobile industries have been requesting increase of the strength in steel to reduce car weight and to improve and car crash worthiness for vehicles. Especially, application of AHSS(Advanced High Strength Steel) and UHSS(Ultra High Strength Steel) have been increasing for car remarkably in recent years. Although, Cold rolled UHSS mainly used to car body, we tried to develop UHSS using hot rolled process to reduce the cost and the manufacturing process of hot rolled sheet for substitude cold rolled UHSS. In this study, mechanical properties and microstructure characteristics of the developed 1.2㎬ grade hot rolled UHSS was analyzed.
노태봉(Taebong Noh),김성주(Sungju Kim),김재석(Jaesuk Kim),이인식(Insik Lee) 한국자동차공학회 2013 한국자동차공학회 부문종합 학술대회 Vol.2013 No.5
Intelligent Parking Assist System in this paper is confined to the device that reduces the driver’s efforts by carrying through the following three steps instead of driver: searching the available parking space using ultrasonic sensors, calculating parking course to empty parking lot, and steering automatically with using Electric Power Steering (EPS) system. This paper considers the development of algorithm for searching function to improve driver’s usability in Intelligent Parking Assist System. It is suggested the left/right combination searching, parking mode auto detection and bidirectional communication HMI. This algorithm has been validated the feasibility in the Hardware-in-the-loop simulator.
유관선(Kwansun You),김성주(Sungju Kim),김재석(Jaesuk Kim),노태봉(Taebong Noh),이인식(Insik Lee) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
Autonomous parking assistance system in this paper is confined to the device that reduces the driver’s efforts by carrying through the following three steps instead of driver: searching the vacant lateral space with ultrasonic sensors, calculating parking course to empty parking lot, and steering automatically with using Electric Power Steering (EPS) system. This paper considers the development of algorithm after the first step in autonomous parking assistance system. It is developed the technique that makes parking path having continuous steering profile avoiding collisions with the surroundings found in parallel and perpendicular parking circumstances. And it is designed the technique tracking the path based on simple feedforward-feedback control. The techniques of path-planning and path-tracking are embodied on embedded MCU and tested at the real parking conditions composed of the cars and other objects like as cone, tree, wall and curbstone.