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단일벽 탄소나노튜브 센서를 이용한 SF₆ 가스절연장치의 부분방전 진단
정세훈(Sehun Jung),이상욱(Sangwoog Lee),장용무(Yongmoo Chang),이종철(Jongchul Lee),김영진(Youngjin Kim),백승현(Seunghyun Baik) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
The Partial discharge (PD) detection in the early stages has become increasingly important in order to avoid the fatal failure of a gas-insulated system. This paper shows that single-walled carbon nanotube (SWNT) sensors, fabricated by alternating current dielectrophoresis, are useful device for the detection of PD activity. Upon exposure to dissociated and oxidized species of SF? generated by PD activity in a closed chamber, the Electrical conductance of the SWNT sensor is found to dramatically increase. The SWNT sensor response was compared with an apparent charge measured according to the IEC 60270 standard. The oxidizing effect of partially filled air was also investigated.
정세훈(Sehun Jung),홍승현(Seunghyun Hong),최재붕(Jaeboong Choi),김영진(Youngjin Kim),백승현(Seunghyun Baik) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.11
Single-walled carbon nanotube (SWNT) sensors, fabricated using alternative current dielectrophoresis, were used to detect decomposed ions and radicals in plasma. In this work, we monitored the electrical conductance of the SWNT sensors in sulfur hexafluoride (SF?) plasma. The electrical conductance of the SWNT arrays exposed to SF? plasma gradually decreased. This result demonstrates that the electronic detection of the decomposed ions and radicals is possible with SWNT sensors.
일개한의의료기관에서 시행한 침도치료 시술 후 이상반응에 대한 설문조사
정세훈 ( Sehun Jung ),우종원 ( Jongwon Woo ),채효청 ( Hyocheong Chae ),오기창 ( Kichang Oh ),최소연 ( Soyoun Choi ),이주현 ( Joohyun Lee ),강경호 ( Kyungho Kang ),추홍민 ( Hongmin Chu ),유명석 ( Myungseok Ryu ) 경락경혈학회 2020 Korean Journal of Acupuncture Vol.37 No.4
Objectives : This study aimed to evaluate adverse outcome associated with acupotomy and compare it with that of acupuncture. Methods : We retrospectively analyzed the chart records of 71 patients who received acupotomy at Daemyung Korean medical clinic from January 7, 2020 to March 6, 2020. We divided the acupotomy treatment area into 10, including the head, hand, chest, knees, shoulders, low back, neck, upper extremities, thighs, and feet. Furthermore, we investigated the adverse effect of acupotomy on those areas after treatment. Data were analyzed using descriptive statistics, and frequency analysis. Results : ‘Bruise of specific region’ accounted for the largest portion with 29 cases, followed by 24 cases of ‘feeling tired and sleepy’ and 17 cases of ‘itch’. There were 16 cases of ‘sustained pain’ at the area of treatment, 11 cases of ‘fatigue’, 5 cases of ‘swelling’, 5 cases of ‘dizziness’, 4 cases of ‘hematoma’. There were 3 cases of ‘vertigo’ and 2 cases of ‘parathesia’ and ‘wide bruises’, ‘headache’, ‘gastric discomfort’, ‘bleeding’, and ‘skin rash’ each. There was one case each that experienced ‘unclear pronunciation’, ‘nausea’, ‘abnormal sweating’, ‘vomiting’ and ‘emotional/psychological reactions’. Conclusions : Adverse outcomes associated with acupotomy were mostly ‘bruise of specific region’, ‘feeling tired and sleepy’, ‘itch’, ‘sustatained pain’, and ‘fatigue’. However, no adverse outcome or irreversible damage that have a serious effect on the body were observed.
부분방전에 의한 분해생성물 거동 모델링을 위한 예비 연구
표진수(Jin-Soo Pyo),정세훈(Sehun Jung),백승현(Seunghyun Baik),김윤제(Youn-Jae Kim),이종철(Jong-Chul Lee) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
The use of gas-insulated switchgear (GIS) has been significantly increased in electric power plants. Each component of GIS is enclosed in a metal chamber, filled with compressed gaseous sulfur hexafluoride (SF?) as an electrical insulating medium. However, partial discharge (PD) or arc discharge, generated by sharp edges or small contaminant particles inside GIS, can cause the electrical breakdown of the system. Therefore, the PD detection in the early stage has become increasingly important in order to avoid the fatal failure of GIS. As Single-walled carbon nanotubes (SWNT) is good to sence decomposition products which are produced by PD, development of SWNT sensor is proceeding recently. In this study, numerical analysis was carried out, using a commercial CFD code, Phoenics, to obtain density distribution of decomposition product in a chamber modeling.
ERP 기반 실시간 데이터 아카이빙 기술에 관한 특허 분석 및 신규 핵심특허 창출에 관한 연구
김가윤(Gayun Kim),정세훈(Sehun Jung),양진홍(Jinhong Yang) 한국정보전자통신기술학회 2024 한국정보전자통신기술학회논문지 Vol.17 No.2
최근 많은 산업 분야에서 진행되고 있는 디지털 트랜스포메이션은 데이터의 폭발적인 증가를 가져왔으며, 동시에 기업이 생성하고 처리해야 하는 데이터의 양을 기하급수적으로 증가시켰다. 이에 기업은 ERP 시스템을 활용해 실시간으로 대량의 데이터를 관리하고 분석하는 데 노력을 기울이고 있다. 그러나 기존 ERP 시스템에서 대량의 데이터를 처리하는 데 있어 비용 및 시간 문제가 발생하고 있어, 기존 시스템에서 데이터를 실시간으로 압축하고 저장할 수 있는 데이터 아카이빙 기술의 적용이 필수적이다. 이에 본 논문에서는 ERP 기반 실시간 데이터 아카이빙 기술에 관한 특허 데이터를 활용하여 대상 기술의 동향을 파악하고, 핵심 특허를 분석하여 이를 기반으로 신규 핵심특허를 창출하고자 한다. The recent digital transformation in many industries has led to an explosion of data, which has exponentially increased the amount of data that companies need to generate and process. As a result, enterprises are leveraging ERP systems to manage and analyze large amounts of data in real time. However, due to cost and time issues in processing large amounts of data in existing ERP systems, it is essential to apply data archiving technology that can compress and store data in real time in existing systems. Therefore, this paper aims to identify the trends of the target technology by utilizing patent data on ERP-based real-time data archiving technology, analyze the core patents, and create new core patents based on them.