Method for Protection of Single‑Line‑Ground Fault of Distribution System with DG Using Distance Relay and Directional Relay

Jung‑Hun Lee,Min‑Su Park,Hong‑Seon Ahn,Kyung‑Won Park,Jun‑Seok Oh,Seung‑Gyu Jeon,Dong‑Kyu Kim,Jae‑Eon Kim 대한전기학회 2020 Journal of Electrical Engineering & Technology Vol.15 No.4

When large scales DG are connected to the distribution system of unidirectional power currents, bi-directional power currents are formed, making it impossible to use conventional overcurrent protection methods alone to detect and isolate fault sections for ground and short-circuit faults. To solve these problems, this study proposed the method of protection against single-line-ground fault of common neutral line multi-contact local power distribution system using distance relay and directional relay. The proposed protection method was applied to the common neutral multi-ground distribution system to validate the protection against single-line-ground fault through the PSCAD/EMTDC software package and efectively detect and isolate only the zone of single-line-ground fault without malfunctions.

BCR-ABL 융합유전자를 동반한 급성 골수구성 백혈병 1예

최정민,송성은,이규진,이규원,이호섭 고신대학교 의과대학 2009 고신대학교 의과대학 학술지 Vol.24 No.1

BCR-ABL 융합 유전자를 동반한 급성골수구성백혈병은 그 빈도가 매우 낮고, 만성골수구성백혈병의 급성악화기와 임상적으로 유사한 특징을 가진다. 항암화학요법으로 관해유도가 되기 어렵거나, 관해유도 후 재발의 빈도가 높은 특징을 가지고 있어 예후가 나쁘다고 알려져있다. 저자들은 BCR-ABL 융합 유전자를 동반한 급성골 수구성백혈병1례를 경험하였기에 문헌고찰과 함께 보고 하는 바이다. BCR-ABL fusion gene is the hallmark of chronic myelogenous leukemia (CML), but it has been rarely reported in acute myeloid leukemia (AML). AML with BCR-ABL fusion gene has different features from blast crisis of CML. We experienced a rare case of AML with BCR-ABL fusion gene. Here we report this case with a brief review of literatures.

정상 관동맥을 가진 심장 점액종 환자에서 발생한 급성 심근 경색증 1예

이정민,이현승,전은정,윤호중,정욱성,오용석,김철민,김재형,최규보,홍순조,이교영,심상인 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.9

대구시 소방권역별 접근성 분석을 이용한 구조대 재편방안

정규동(Jung Gyu-Dong),홍원화(Hong Won-Hwa),최준호(Choi Jun-Ho),김광섭(Kim Gwang-Seob),이지수(Lee Ji-Soo) 대한건축학회 2012 대한건축학회논문집 Vol.28 No.9

In a fire situation, the priority is fast and safe rescue. Therefore, because of the importance of the role of rescue team, specify the criteria of equipments as act. But it can’t be helped appear vulnerable area according to the problems such as province fiscal conditions and budget. in this study suggest improvement considering the characteristics of the actual road and emergency vehicles through accessibility analysis. In the process of vulnerable area deduction, the area of service area is wider, the larger number of vulnerable buildings. And analyze that especially approximately 77% of the entire are vulnerable buildings. Jung-gu, Daegu, the center of the approach is only 3% of vulnerable buildings, but as a whole of Daegu, Within 5 minutes from the rescue team are difficult to access the building by about 30 percent. In order to improve it, Station of jurisdiction that need to be adjusted or additional installations proposed regional strategy for the reorganization. According to the proposed strategy to evaluate the improvement, vulnerable about the whole building from 140,000 to 70,000 could be reduced by half. Alternative to reduce the vulnerability of buildings according to the percentage reduction in overall approximately 30-16% can be reduced. If use the result of study, it will be able to set priorities of expansion of rescue team, and utilized to predict macroscopic vulnerable area in Daegu city.

금식시 흰쥐 소장 점막 유당분해효소에 대한 갑상선 호르몬의 영향 및 이의 유전적 조절 기전

이국래,이동호,이한주,윤정환,김재규,정운태,정현채,송인성,김정룡 大韓消化器病學會 1996 大韓消化器病學會誌 Vol.28 No.6

KAL기 추락에 의한 대량재해의 개인식별

강신몽,이원태,고영창,최상규,김윤희,이홍석,서재관,윤중진,이혜경,최득린,김종열,윤창육,변명식,이장홍 大韓法醫學會 1991 대한법의학회지 Vol.15 No.2

Individual identification is an important part in medicolegal field especially in mass disaster. At July, 27, 1989, KAL KE-803 was crashed on landing at Tripoli International Airport, Liba. The plane was caught in fire and sixty eight Koreans were sacrified. The majority of victims were severely charred and injured. The authors examed all dead bodies and successfully identified all the cases through visual, anthropological, odontological, radiological and pathological methods including fingerprint and blood typing.

사상의학과 형상의학의 유형분류의 연관성에 관한 연구

장아름,전수형,박세정,이현미,김규곤,이용태,지규용,이인선,김종원,Jang, A-Reum,Jeon, Soo-Hyung,Park, Se-Jung,Lee, Hyun-Mi,Kim, Kyu-Kon,Lee, Yong-Tae,Ji, Gyu-Yong,Lee, In-Sun,Kim, Jong-Won 사상체질의학회 2010 사상체질의학회지 Vol.22 No.3

1. Objectives: This study was performed to research the relationship between Sasang Constitutional medicine and Hyungsang medicine. 2. Methods: Four hundred and thirty applicants are involved in this study. They are devided into Sasang Constitution and Hyungsang Classification 3. Results and Conclusions: There are significances between Sasang Constitutional diagnosis and Hyungsang Classification. There are significantly more Bangkwang-body, Gi-kwa, Taeyang-hyung, Yangmyung-hyung in Taeyangin and Bangkwang-body, Jung-kwa, Soyang-hyung, Yangmyung-hyung in Soyangin. There are significantly more Dam-body, Gi-kwa, Taeyang-hyung, Yangmyung-hyung in Taeeumin and Bangkwang-body, Gi-kwa, Taeyang-hyung, Yangmyung-hyung in Soeumin.

電子商去來에서의 消費者 保護에 관한 硏究

이양우,장정규 한국유통정보학회 2002 유통정보학회지 Vol.5 No.1

A study on the Customer Protection result from Electronic Commerce Present industrial society is knowledge society or information society. By bringing computer technologies and information communication technologies together, internet appeared and used commonly, moreover, it created new cyberspace. As this cyberspace made electronic transactions possible that is different from ordinary mode of dealing, it offers reduction in time and costs, customer centered services, resolving time and space limitation, and it offers customers new world that they could's even imagine before. Not like normal mode of transaction, electronic transactions is digitalized and transaction is mode based on not-facing dealing instead of facing dealing. Moreover, because electronic transactions is corresponding dealing to standardized forms and chosen terms of dealing, and many unspecific people interpose, and it shows international character that is dealing through internet, it has more possibilities of customer's loss compared with normal transaction mode. Specially, as electronic transactions increases between companies and customers, protecting customers who are weak is essential. Solutions for protecting customers from many problems that can happen in electronic transactions are listed at below. At first, securing confidence of customers. To prevent impostures that customers are worried most, certification by appointed licensed Certificate Authority for confirming major matters that are related to the dealing should be issued, and also for user's credit judgment, information offering system(marking system and credit assessment authority) by third party is required. The best method of securing customers' trust is activation education of customers and entrepreneurs. Moreover, because error responsibility principle doesn't work well, and insurance system that can break up losses and damages should be found. On the other side, according to specific characters of electronic transactions, by using Electronic Transaction Act, Electronic Signature Act, Electronic Transaction Customer Protection Guideline, Standardized Contracts of Electronic Transactions, effective regulations should applied. Specially, because act of electronic transactions has guideline character, there are necessity of supplementation about insufficient parts of existing law. Also, problems in electronic transactions can be really effected by autonomic controlling efforts of entrepreneurs. America, EU, Japan and other many advanced countries realize customer protection by preferring autonomic control instead of legislating rashly. Therefore, in our country, government, with strong leadership, should grant incentives that legally approves about decisions and evaluation of regulations, which are made by enterprises autonomically, and self-imposed control organization, which is established and operated by the industry.

기관지 탄분 섬유화증 환자의 임상 경과와 고감도 C-반응 단백(high sensitivity C-reactive protein, hsCRP)과의 상관 관계 비교

이규원,옥철호,장태원,정만홍 고신대학교의과대학 2008 고신대학교 의과대학 학술지 Vol.23 No.4

Background: To investigate the association between bronchial anthracofibrosis(AF) and tuberculosis(TB). and the clinical utility of high sensitivity C-reactive protein(hsCRP) for diagnosis of active pulmonary TB in patients with bronchial AF. Method: Eighty three patients(62 women and 21 men ranging in age from 55 to 87), who were diagnosed with bronchial AF by a bronchoscopy, were enrolled in this study. The hsCRP was measured in patient's blood. The hsCRP results were compared with the bacteriological, and clinical finding. Results: The common respiratory symptoms were cough(70%), sputum(35%), dyspnea(20%), and hemoptysis(10%). The sputum AFB smear, culture were positive in 20(22.8%) and 37(44.5%) patients, respectively. The level of hsCRP in patients with postive culture was significantly higher than that of patients with negative culture.(4.67±7.5, 0.90±1.59, p=0.005). Of 63 patients with negative smear, the level of hsCRP in patients(n=18) with positive culture was higher than that of patients(n=45) with negative culture.(3.39±5.78, 0.92±1.50, p=0.013). Of 20 patients with negative smear and positive culture who were empirically treated with anti-TB medication, 11 patients showed radiologic response. and their level of hsCRP was higher than that of 9 patients who showed no radiologic response.(1.56±1.89, 0.81±0.10,p=0.03) Conclusion: hsCRP appears to be useful diagnostic tool for predicting active pulmonary tuberculosis. in patients with bronchial AF.

우리나라 中小企業의 電子商去來 障碍要因과 活性化 方案에 관한 硏究

이양우,장정규 한국유통정보학회 2001 유통정보학회지 Vol.4 No.2

Considering the significant importance of small and medium sized industry in the national economy and its potential value from the sense of one community by nature, the role of uprising small and medium companies in the new markets based on electronic commerce has become one of the biggest political issues in every country nowadays. Small companies can take more benefits from information technology and electronic commerce than the larger ones. The size of a company really does not concern any longer, in the internet business, as far as small-sized companies explore regional expansions and develop new customers as the larger companies used to do before, and thereby they can equally compete with the larger companies. To enhance the electronic commerce trade, fundamental and systematic solution for such impaction factors, as information security, electronic settlement, standardization, intellectual property, as well as technical disadvantage, should be taken into consideration. This thesis is composed of five chapters as follows : Chapter 1 was introduction this thesis. Chapter 2 provided a basic research and theoretical inquiry into electronic commerce. Chapter 3 offered an inquiry into the present situation and trend of electronic commerce in Korea(in international movement) classified by general and small & medium enterprises. Chapter 4 identified the barriers of electronic commerce small & medium enterprises. And suggested to overcome those barriers and to enlarge Korean electronic commerce small & medium enterprises. Chapter 5 presented the concluding remarks. Electronic Commerce cannot replace the whole future logistic environment, but has been widely adopted as a new axis in logistics. So, broad study especially on the development of logistic information system and electronic commerce standard model for small & medium companies and DB marketing should be additionally conducted, in line with the study on its influence on political and economic dimensions. Small & medium enterprises can easily adopt themselves to the rapidly changing technological environment with continuous innovation. This means that the small & medium enterprises are an enterprise from which is most suitable for the knowledge and information society in 21C.