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기계적으로 합금화되 Al-Fe합금의 풀림처리에 따른 기계적 특성
서휘성,정석주,구본권 ( H . S . Seo,S . C . Chung,B . K . Koo ) 한국열처리공학회 1995 熱處理工學會誌 Vol.8 No.3
Mechanical alloying behaviour was investigated after adding 6, 8, 12wt% Fe powder into A1 matrix, respectively, in order to develop Al alloy. And the mechanical characteristics of the alloy which was produced by the above method were studied. The hardness and ultimata tensile strength of the material with different compositions were found to be increased with annealing temperatures and holding times. Intermetallic compound of Al₃Fe and carbide of Al₄C₃phases, which were generated from the different compositions during annealing, were found. It was suggested that enhancement of mechanical properties of Al-Fe alloy system was due to the presence of these preapitates that constrained grain growth and blocked dislocation movement in the alloy system.
기계적으로 합금화된 Al-Fe합금의 열처리에 따른 기계적 특성에 관한 연구
정석주,서휘성 서울산업대학교 산업대학원 1996 大學院論文集 Vol.4 No.-
Mechanical alloying behaviour was investigated after adding 6,8, 12w/o Fe powder into Al matrix, respectively, in order to develop Al alloy. And the mechanical characteristics of the alloy which was produced by the above method were studied. The hardness and ultimate tensile strength of the material with different compositions were found to be increased with annealing temperatures and holding times. Intermetallic compound of Al₃Fe and carbide of Al₄C₃ phases, which were generated from the different compositions during annealing, were found. It was suggested that enhancement of mechanical properties of Al-Fe alloy system was due to the presence of these precipitates that constrained grain growth and blocked dislocation movement in the alloy system.
온침이 만성요통에 미치는 효과에 대한 무작위배정 대조군 예비 임상연구 프로토콜
서연호 ( Yeonho Seo ),김태오 ( Taeoh Kim ),조휘성 ( Whisung Cho ),고준혁 ( Junhyuk Ko ),안종현 ( Jonghyun Ahn ),김수전 ( Soo Jeon Kim ),이한솔 ( Hansol Lee ),장호경 ( Hokyung Chang ),김형석 ( Hyungsuk Kim ),김고운 ( Koh-woon Kim ) 한방재활의학과학회 2020 한방재활의학과학회지 Vol.30 No.4
Objectives This study is aimed to evaluate the feasibility of further clinical research of warm needle acupuncture as an effective and safe treatment for chronic low back pain. Methods Thirty participants will be randomly assigned to the Warm needle acupuncture group (n=15) and Dry needle acupuncture group (n=15). All patients will receive acupuncture therapy twice a week for 6 weeks, but only the experimental group will receive thermal stimulation. The primary outcome will be measured using the visual analogue scale for bothersomeness of low back pain, and the secondary outcome will be measured using the VAS for pain intensity, Oswestry disability index, 36-Item Short Form Health Survey, Beck's depression inventory, and amount of analgesics used. Conclusions The results of this study will be used to determine the feasibility of a future large-scale randomized controlled trial that provides clinical evidence for the efficacy and safety of warm needle acupuncture in the treatment of patients with chronic low back pain. (J Korean Med Rehabil 2020;30(4):155-164)
분산자원 통합 관리를 위한 OpenADR2.0 및 TASE.2 기반 가상발전소 시스템
서종관(Jong Kwan Seo),이태일(Tae Il Lee),이휘성(Whee Sung Lee),박점배(Jeom Bae Park) 한국전기전자학회 2020 전기전자학회논문지 Vol.24 No.1
가상발전소는 개별 분산자원의 통합 관리를 통해 계통운영에 참여를 가능하게 하는 일종의 소프트웨어 발전소이다. 본 논문에서는 단일 발전시스템으로 가상발전소를 운영하기 위하여 국내 전력시스템 통신에 사용되는 TASE.2(Telecontrol Application Service Element) 표준과 분산자원 관리 기술인 OpenADR(Open Automated Demand Response)2.0 표준을 결합하여 상위 전력시스템과 하위 분산자원을 공통정보모델로 구성한 통신 아키텍처를 제시한다. 분산자원의 기본 형태인 ESS를 TASE.2 SBO(Select Before Operate) 디바이스로 구성하고 관련 오브젝트를 OpenADR2.0 리포트 및 이벤트 서비스와 매핑하여 단일 시퀀스 타입으로 설계한다. 시뮬레이션 검증을 통해 두 표준에 준수한 데이터 교환 및 동작을 확인한다. A virtual power plant is a kind of software power plant that enables participation in power operation by integrally managing individual distributed resources. This paper proposes a common information communication architecture based on the TASE.2 standard and the OpenADR2.0 standard to operate a virtual power plant as a single power system. ESS is designed TASE.2 SBO devices that related objects are mapped to OpenADR2.0 services and composed as a single sequence type. Through simulation verification, it conforms data exchange and operation based on both standards.
태양광 발전 이상감지를 위한 아웃라이어 추정 방법에 대한 연구
서종관(Jong Kwan Seo),이태일(Tae Il Lee),이휘성(Whee Sung Lee),박점배(Jeom Bae Park) 한국전기전자학회 2020 전기전자학회논문지 Vol.24 No.2
태양광 발전은 특성상 간헐성과 불확실성이 항상 존재하기 때문에 정확한 예측은 어려우며, 실시간 발전량 진단을 위한 이상감지 기술이 중요하다. 본 논문에서는 다양한 파라미터의 상관관계를 도출하고 최근접 이웃 알고리즘을 적용하여 정상데이터와 비정상데이터를 분류한다. 두 분류의 결과는 발전 시스템의 결함에 의한 아웃라이어와 구름 등에 의해 단기간 동안 발생하는 부분 음영 및 전체 음영의 일시적인 전력손실을 보여준다. 100kW 발전소 데이터를 대상으로 머신러닝 분석을 수행하여 테스트 결과를 산출하였으며 실제 이상치와 이상치 후보지를 검증하였다. Photovoltaic (PV) has both intermittent and uncertainty in nature, so it is difficult to accurately predict. Thus anomaly detection technology is important to diagnose real time PV generation. This paper identifies a correlation between various parameters and classifies the PV data applying k-nearest neighbor and dynamic time warpping. Results for the two classifications showed that an outlier detection by a fault of some facilities, and a temporary power loss by partial shading and overall shading occurring during the short period. Based on 100kW plant data, machine learning analysis and test results verified actual outliers and candidates of outlier.
Rezen(감로수)을 활용한 절식프로그램이 프리다이버의 피로도 개선에 미치는 영향
조휘성(Hwi Sung Cho),양진광(Jin Kwang Yang),신승우(Seung Uoo Shin),김동환(Dong Hwan Kim),신현택(Hyun Taeg Shin),조재흥(Jae Heung Cho),김태오(Tae Oh Kim),서연호(Yeon Ho Seo),정원석(Won Seok Chung) 대한스포츠한의학회 2022 대한스포츠한의학회지 Vol.22 No.1
Objectives We conducted a survey to investigate the fasting program using Rezen is effective for freediving. Methods A survey was conducted before and after the freediving fasting program for 15 participants. Participants were athletes who participated in a freediving competition held in Cebu Mactan, Philippines. A structured questionnaire of freediving fasting program was distributed to responders and all data were statistically analyzed. Results All respondents were freediving intermediate or higher, and 9 out of 15 were instructors. There was no significant difference in the results of the subjective symptom questionnaire to check the side effects of the fasting program. As a result of revised Chalder’s fatigue scale, there was a significant improvement in 6 items of alertness, motivation, energy, muscle strength, physical strength, and concentration among 11 items, and the total score was improved from 24.60±4.42 to 18.87±5.17, which was significantly improved by 5.73±5.34 points. As a result of the taste evaluation of Rezen, 6 people responded ‘Excellent’, 4 people responded ‘good’, 3 people responded ‘average’, and 2 people responded ‘Below average’. When asked whether the fasting program was helpful to freediving, 1 people responded ‘Extremely helpful’, 7 people responded ‘Very helpful’, 4 people responded ‘Somewhat helpful’, 1 people responded ‘Not so helpful’, and 1 people responded ‘Not at all’. Conclusions The possibility that the fasting program using Rezen could be effective for freediving by improving fatigue was confirmed, and the potential of Rezen as a sports drink was improved.
족관절염좌 환자 관리를 위한 한의표준임상경로 개발 연구
윤상도,송미연,정원석,김형석,신우철,김태오,조휘성,서연호,서상우,서준원,강준혁,유승호,김세윤,조재흥 한방재활의학과학회 2022 한방재활의학과학회지 Vol.32 No.3
Objectives The purpose of this study is to improve the accessibility of Korean medicine by standardizing managements, improving quality of medical services, and reducing medical costs in ankle sprain by develop clinical pathway (CP). Methods The development of CP in this study is based on clinical practice guideline (CPG) for ankle sprain, and aims to maximize the quality of treatment, such as reducing treatment time and medical costs, and increasing patient satisfaction through standardized pathway. The CP was revised after consultation and review by the advisory committee. The advisory committee is consisted of a stakeholder group applying the CP. Results In previous research studies, there were no Korean medicine CP studies on ankle sprain. Based on CPG for ankle sprain and analysis of medical records, 6 types of time task matrix type CP (for Korean medicine doctors, medical assistant, patients) and 4 types of algorithm type CP (for Korean medicine clinics, Korean medicine hospitals, and cooperative practicing hospitals, public medical centers) were derived as a result. Conclusions Ankle sprain CP is expected to not only increase patient satisfaction and maximize the quality of treatment, but also reduce the financial burden of health insurance by reducing medical costs.
요추 추간판 탈출증 환자의 의·한의 협진 의료이용 현황 분석: 건강보험심사평가원 환자표본 데이터를 이용하여
고준혁 ( Jun-Hyuk Ko ),유지웅 ( Ji-Woong Yu ),서상우 ( Sang-Woo Seo ),서준원 ( Joon-Won Seo ),강준혁 ( Jun-Hyuk Kang ),김태오 ( Tae-Oh Kim ),조휘성 ( Whi-Sung Cho ),서연호 ( Yeon-Ho Seo ),안종현 ( Jong-Hyun Ahn ),이우주 ( Woo-Joo 한방재활의학과학회 2021 한방재활의학과학회지 Vol.31 No.4
Objectives Lumbar herniated intervertebral disc (L-HIVD) is common disease in which Western-Korean collaborative treatment is performed in Korea. This study aimed to analyze Western-Korean collaborative treatment utilization of Korean patients with L-HIVD using Health Insurance Review & Assessment Service’s Patients Sample Data. Methods This study used the Health Insurance Review & Assessment Service-National Patient Sample (HIRA-NPS) in 2018. Claim data of L-HIVD patients were extracted. The claim data were rebuilt with the operational concept of ‘episode of care’ and divided into Korean medicine episode group (KM), Western medicine episode group (WM) and collaborative treatment episode group (CT). General characteristics, medical expenses and healthcare utilization were analyzed. In addition, the difference of average visit day and average medical expenses between non-collaborative group (KM plus WM) and CT were analyzed by the propensity score matching method. Results A Total of 64,333 patients and 365,745 claims were extracted. The number of episodes of WM, KM and CT was 69,383 (92.97%), 3,903 (5.23%), and 1,341 (1.80%) respectively. The frequency of collaborative treatment episode was higher in women and the age of 50s. The most frequently described treatment in CT was acupuncture therapy. As a result of the propensity score matching, the number of visit days and medical expenses in the collaborative treatment group was higher than in the non-collaborative group. Conclusions The analysis of healthcare utilization of Korean-Western collaborative treatment may be used as basic data for establishing medical policies and systematic collaborative treatment model in the future. (J Korean Med Rehabil 2021;31(4):105-116)