Study on Reliability Improvement of Voltage Transformers by Increasing Voltage Factor

Tae‑Sik Kong,Hee‑Dong Kim,Hung‑Sok Park,Soo‑Hoh Lee,Soon‑Yong Kim,Pil‑Bum Joung,Jin‑Yeub Park 대한전기학회 2020 Journal of Electrical Engineering & Technology Vol.15 No.3

Voltage transformers (VTs) must be highly reliable as they are essential components of the electric power industry. VT failures can cause a signifcant impact for important facilities such as nuclear power plants. In fact, VTs which passed the international standard, were damaged and sometimes resulted in the shutdown of the nuclear power plants. In order to improve the reliability, VTs with various iron core was studied. The electromagnetic feld simulation, a saturation characteristics test, and an overvoltage breakdown test were conducted. The result shows that the magnetic fux density signifcantly afects the reliability of VTs. To increase the reliability of VTs, it is required to reduce the magnetic fux density by increasing the knee-point and voltage factor. Owing to limited installation space, increasing the size of the iron core is difcult. Instead, VT by decreasing the thickness of the conductor and increasing the number of turns, it was possible to reduce the magnetic fux density without the size change. Therefore, improved VTs were obtained by decreasing the thickness of the conductor and increasing the number of turns, and the improved reliability was verifed through a comparison test with existing VTs. The fabricated VTs shows a signifcantly higher saturation voltage and breakdown time than existing VTs. Thus, by proposed VTs can contribute the stable operation of the nuclear power plant and improve the manufacturer’s quality.

하악골에 발생한 골막 골육종

김태우,김승범,권혁찬,문선재,윤정훈,김형준,차인호,육종인,김진 대한악안면성형재건외과학회 2002 Maxillofacial Plastic Reconstructive Surgery Vol.24 No.1

Periosteal osteosarcoma is a distinct entity of malignant bone tumor with characteristic clinical, morphological, and histological features within the group of juxtacortical osteosarcoma. Periosteal osteosarcoma is predominantly located in the tubular long bones, and extremely rarely involving the jaws. A case of periosteal osteosarcoma of the right mandible is presented. A 27-year-old woman complained of the gingival swelling and bleeding tendency of the right posterior mandible. Clinical examination revealed a reddish brown strawberry-like swelling on the affected mucosa, which measured 1.5㎝×1.5㎝. The tumor was located on the lingual cortex of the mandible and extended into the surrounding soft tissues. Microscopically, the tumor consisted exclusively of atypical chondroblastic cells with a small osteoblastic area. A minimal bone marrow involvement was noted and the adjacent cortex was free of tumor. These findings suggested that the tumor originated from the periosteal cambium layer, which lies between the periosteal fibrous layer and the cortex of mandible.

정신분열병에 대한 리스페리돈의 효과 및 안정성

이민수,김용구,김영훈,연병길,오병훈,윤도준,윤진상,이철,정희연,강병조,김광수,김동언,김명정,김상훈,김희철,나철,노승호,민경준,박기창,박두병,백기청,백인호,손봉기,손진욱,양병환,양창국,우행원,이정호,이종범,이홍식,임기영,전태연,정영조,정영철,정인과,정인원,지익성,채정호,한상익,한선호,한진희,서광윤 大韓神經精神醫學會 1998 신경정신의학 Vol.37 No.1

연구목적 : 본 시험의 목적은 임상시험 시작전에 연구자들을 대상으로 PANSS Workshop을 통하여 PANSS, ESRS에 대한 국내에서의 표준화 작업을 구축하고 새로운 정신병 치료제인 리스페리돈의 효과와 안정성을 재확인하여 리스페리돈 사용에 대한 적정화를 이루는데 있다. 연구방법 : 1996년 4월부터 1996년 9월까지 국내 39개 대학병원 정신과에 입원중인 혹은 증상이 악화되어 입원하는 정신분열병 환자 377명을 대상으로 다시설 개방 연구를 시행하였다. 1주일간의 약물 배설기간을 가진후, 리스페리돈을 8주간 투여하였고, 기준점, 1주, 2주, 4주, 그리고 8주후에 평가되었다. 용량은 제1일에는 리스페리돈 1mg씩 1일 2회, 제2일에는 2mg씩 1일 2회, 제3∼7일에는 3mg씩 1일 2회 투여하였다. 이후 환자의 임상상태에 따라 임의로 증량할 수 있으며, 최대 일일 16mg을 초과하지 않도록 하였다. 추체외로 증상을 조절하기 위한 투약을 허용하였다. 임상증상 및 부작용의 평가는 PANSS(Positive and Negative Syndrome Scale), CGI(Clinical Global Impression) 그리고 ESRS(Extrapyramidal Symptom Rating Scale)을 사용하였다. 연구결과 : 377명중 343명(91%)이 8주간의 연구를 완결하였다. 치료 종결시점인 8주후 PANSS 총점수가 20% 이상 호전된 경우를 약물 반응군으로 정의할때, 약물반응군은 81.3%였다. 리스페리돈에 반응하는 예측인자로는 발병연령, 이전의 입원 횟수, 유병기간이 관련 있었다. 리스페리돈은 1주후부터 PANSS양성, 음성, 및 일반정신병리 점수상에 유의한 호전을 보여 효과가 빨랐다. CGI의 경우도 기준점에 비해 1주후부터 유의한 감소를 나타내었다. ESRS의 경우, 파킨슨 평가점수는 기준점과 비교해 투여 1주, 2주, 4주후 유의하게 증가되었다가 8주후 기준점과 차이가 없었다. Dystonia 평가점수는 1주후만 유의한 증가를 보였으며, dyskinesia 평가점수는 유의한 차이가 없었다. 혈압, 맥박수의 생명징후 및 일반 혈액학 검사, 생화학적 검사, 심전도 검사에서 유의한 변화는 없었다. 결 론 : 이상의 다시설 개방 임상 연구를 통해 리스페리돈은 정신분열병 환자에서 양성증상뿐만 아니라 음성증상 및 전반적인 증상에도 효과적인 것으로 사료된다. 보다 명확한 평가를 위해서는 다른 항정신병약물과의 이중맹검 연구가 필요할 것으로 생각되며, 또한 장기적 치료에 대한 평가도 함께 이루어져야 하겠다. Objective : The purpose of this study was to investigate the efficacy and safety of risperidone in the treatment of Korean schizophrenic patients. Method : This multicenter open study included 377 schizophrenic patients drawn from 39 university hospitals. After a wash-out period of 1 week, the schizophrenic patients were treated with risperidone for 8 weeks and evaluated at 5 points ; at baseline, and 1, 2, 4 and 8 weeks of treatment. The dose was increased from 2mg/day(1mg twice daily) to 6mg/day(3mg twice daily) during the first week and adjusted to a maximum of 16mg/day over the next 7 weeks according to the patient's clinical response. Medication to control extrapyramidal symptoms was permitted. The psychiatric and neurological status of the patients was assessed by PANSS, CGI, and ESRS scales. Results : 343(91%) of 377 patients completed the 8-week trial period. Clinical improvement, as defined by a 20% or more reduction in total PANSS score at end point, was shown by 81.3% of patients. The predictors of response to risperidone were associated older age, shorter duration of illness, fewer previous hospitalization. Risperidone had rapid onset of action ; a significant decrease of the total PANSS and three PANSS factor(positive, negative, general), and CGI was already noticed at the end of first week. For the ESRS, parkinsonism rating scores were significantly increased until week 4 comparing with baseline. Dystonia rating scores were significantly increased until week 1, and dyskinesia rating scores were not significantly changed during the study. Laboratory parameters including vital sign, EKG, hematological, and biochemical values showed no significant changes during the trial. Conclusions : This study suggests that risperidone is generally safe and effective against both the positive and negative symptoms in our group of patients.

한의진단명과 진단요건의 표준화 연구 III : 3차년도 연구결과 보고

최선미,양기상,최승훈,박경모,박종현,심범상,김성우,노석선,이인선,정진홍,이진용,김달래,임형호,김윤범,박성식,송태원,김종우,이승기,최윤정,신순식 한국한의학연구원 1997 한국한의학연구원논문집 Vol.3 No.1

The diagnostic requirements were suggested and explained regarding the systems of differentiation of symptoms and signs in the third year study of standardization and unification of the terms and conditions used for diagnosis in oriental medicine. The systems were as follows : - analyzing and differentiating of epidemic febrile disease - analyzing and differentiating in accordance with the Sasang constitution medicine based on four-type recognition - differentiation of disease according to pathological changes of Chong and Ren channels - standards for diagnosis of women's disease - standards for diagnosis of children's disease - standards for diagnosis of motor and sensor disturbance (-muscle. born, joint, etc.) - standards for diagnosis of neuropsychiatric disease - standards for diagnosis of five sense organ disease - standards for diagnosis of external disease The indivisual diagnosis pattern was arranged by the diagnostic requirements in the following order : another name, notion of diagnosis pattern, index of differentiation of symptoms and signs, the main point of diagnosis, analysis of diagnosis pattern, discrimination of diagnosis pattern, prognosis, a way of curing a disease, prescription, herbs in common use, disease appearing the diagnosis pattern, documents. The standards for diagnosis of each disease was arranged by the diagnostic requirements in the following order : another name, notion of disease, the main point of diagnosis, analyzing and differentiating of disease, analysis of disease, discrimination of disease, prognosis, a way of curing and prescription of disease, disease in western medicine appearing the disease in oriental medicine, documents.

암모니아 공간분포 조사를 위한 Passive Sampler 개발에 관한 연구

김학민,이범진,김선태 대전대학교 환경문제연구소 2001 환경문제연구소 논문집 Vol.5 No.-

Passive and active samplers are widely deployed for measuring gaseous pollutants such as nitrogen dioxide, sulfur dioxide and ozone in urban and rural air, however odorous compounds like ammonia, hydrogen sulfide are rarely deployed, because they are easily changed by circumstance conditions and perceived that they need a large number of measuring sites to assess mean concentration over the area. So, it is considered that the odor related phenomena could not be easily defined by cost-effective and convenient method. In this study, we developed the new sampling tool for ammonia evaluation in ambient air and the results of evaluation for evaluate the suitability of developed passive sampler for the measurement of daily averaged ammonia concentrations and spatial distribution survey are presented. Three types of absorbing solutions, filters and caps were tested at laboratory condition and the conversion factor, precision and suitability of the samplers were derived from triplicated measurement at paper mill. It is defined that for absoubing ammonia, 2% of phosphoric acid and glycerine mix(1:1) solution and chromatography filter are suitable and rubber cap is unsuitable to use during sampling and storage period. The conversion factor was derived 7.0μA at ordinary ambient air by comparison with reference method(indo-phenol method) at three different conditions. The calculated results of standard deviation among the samplers were lower than 2ppb at 86% sampling sites of total 40 sites and we could recognize the ammonia sources and variation with change of wastewater treatment plant process. Therefore the developed passive samplers are appropriate to survey ammonia spatial distrivution.

척수 손상 환자의 우울에 대한 정신과적 고찰

김문두,신태균,심기범,신지남 최신의학사 2003 最新醫學 Vol.46 No.9-10

폐쇄성 황달로 내원한 담관내 증식을 동반한 간세포암 1예

김승범,김태년,이호찬,박재현,은종렬,장병익,이헌주,윤성수,배영경 영남대학교 의과대학 2008 Yeungnam University Journal of Medicine Vol.25 No.2

The incidence of hepatocellular carcinoma presenting as obstructive jaundice is 0.7 -9% The mechanisms of obstructive jaundice include bile duct invasion by tumor, tumor thrombi, blood clots, direct bile duct compression by tumor, and intraductal tumor growth. We report a rare case of hepatocellular carcinoma with intraductal growth A 46-year-o1d woman was admitted due to colicky right upper abdominal pain and jaundice for 4 days Computed tomography showed dilatation of the left intrahepatic duct, and endoscopic retrograde cholangiography showed a filhng defect in the left main intrahepatic duct. We performed a left lobectomy with a Roux-en-Y hepaticojejunostomy. The tumor was diagnosed as a hepatocellular carcinoma with intraductal growth.

忠北大學校 附設 平生體育硏究所

金泰完,金昌範,張鳳愚,金奎鎭 忠北大學校 平生體育硏究所 1985 平生體育硏究所 論文集 Vol.1 No.-

This study is based on the written inquiry about STAI as a measuring tool, which spielberger developed as a anxiety measure to examine what relationship is between the ability in athletic sports and anxiety. The female or male 153 players 918 to 21 years old) became the subject of this written inquire. Trait anxiety was measured by Form x-2 of STAI (State-Trait Anxiety Inventory) while state anxiety was measured by Form x-1. And then, we compared the records in everyday practices with those in games, and used these records as an ability in games. We tried to clarify the relationship between the ability in games and the anxiety. The subjects for the measurement is divided in the three groups of the athletics track sports; a short, a middle, a long-distance race, and the three groups of the athletics field sports; running, jumping and throw. Analysis-the correlation with the state-trait anxiety we measured the records of athletic sports, examined the influence that anxiety exerts on the ability in game, and compared and analyzed the level of anxiety in each event. We have received these results as the following. 1. The influence that anxiety exerts on the athletics records. The events of athletic sports the relation between the anxiety in everday life and the records in that time shows its correlation(r=-0.374, r=-0.361) only in 100m running, but this is not connected with the other events. But except the midium distance events all of the women and men players are connected with the relation detween the anxiety in game and the records. So, because the level of anxiety in the game affects the records in the game, the players need to practice the psychological control of themselves and a little anxiety is needed as a stimulant in everyday practices. 2. Anxiety and records in usual time and game. In events of athletic track sports there was a deep relation, except the event of women distance running (r=0.365), between the anxieties in normal times and in game; (0.50,r<0.70). And the event of men 100M running practicing records in normal times and those in games was not considered here. Therefore, the higher anxiety one has in normal times, the higher his anxiety tends to go up in games; the records in practicing times generally corespond to those in games though such relation is not always applied to the event of 100M running. 3. Anxiety in track and field athletic sports. There was no difference of anxiety in the events of track and field athletic sports between men and women players. Anxiety in games showed the difference in the mean value in all games and their players.

기능성척추측만증에 근막이완요법 및 전침치료 증례

김성욱,강영화,이상훈,권혜연,조태성,송춘호,안창범 동의대학교 한의학연구소 2001 동의한의연구 Vol.5 No.-

목적 : 우리는 신체를 근막의 통합된 전체로 보는 근막이완요법과 TrP를 파괴하는 전침요법을 기능성 척추측만증에 적용시킬수 있는지 알아보았다. 방법 : 22세의 기능성 척추측만증을 가진 남성에게 다양한 형태의 근막이완요법을 적용하였고, 중둔근, 요방형근, 슬괵근에 전침요법을 적용하였다. 결과 : 3주시술후 다리길이차이, 근막구축, Cobb's 각과 척추회전변위가 감소되었고 흉부압박감 같은 전신적증상이 호전되었다. 결론 : 근막이완요법과 전침병행치료가 신체를 근막의 일체로 보는 관점으로 인체의 구조적불균형을 바로 잡아줄수 있는 새로운 치료법의 기능성을 찾았다. Objective: We investigated this study in order to see the adaptation capability of myofascial release that translating the body being integrated fascial totality and electroacupuncture treatment that breaking trigger points in functional scoliosis. Methods: We applied myofascial relase by three patterns and electroacupuncture in TrPs of gluteus medius, Quadratus lumborum and Hamstring muscle to 22 year-old who have had functional scoliosis. Results: After 3 weeks, The leg length, fascial restriction. Cobb's angle and rotation scoliosis are decreased. Systemic symptoms, for example; chest discomfort are improved. conclusion: Myofascial release and electroacupuncture treatment is new methods that treating the sturctural unbalance in view of body's fascial network.

형제에서 발생한 신성 요붕증

김마리,김덕수,정혜천,박범수,하태선 충북대학교 의학연구소 2001 忠北醫大學術誌 Vol.11 No.1

신성 요붕증은 항이뇨 호르몬(antidiuretic hormone, arginine vasopressin)의 혈중 농도가 높음에도 불구하고 신장이 항이뇨 호르몬에 반응하지 못하여 생기는 유전 질환이다.신장이 항이뇨 호르몬에 반응하지 못하면 신장의 농도 조절 작용과 수분 재흡수의 기능이 상실되어 많은 양의 저장(hypotonic) 상태의 뇨를 체외로 배출하므로써 탈수증에 이르게 된다.저자들은 다음, 다뇨 및 성장 장애를 주소로 내원한 형제에서 임상 검사를 통하여 신성 요붕증을 진단하였다.형제 중 형은 8세 남아로 생후 10개월에 다음, 다뇨 및 발열을 주소로 내원하여 신성 요붕증을 진단 받고 치료를 시작하였으나, 보호자 자의로 약물 복용을 중단하였다.14개월 남아인 동생이 다음, 다뇨 및 성장 장애의 증상으로 내원하여 같은 방법으로 신성 요붕증을 진단받았고, 현재 형과 함께 이에 대한 치료를 받고 있다.저자들은 형제에서 발생한 신성 요붕증을 경험하였기에 문헌 고찰과 함께 보고하는 바이다. Nephrogenic diabetes insipidus is a genetic disease that the kidney cannot respond to a-ntidiuretic hormone in spite of elevated serum antidiuretic hormone.Failure of the kidney to respond to antidiuretic hormone result in decreased function of the kidney of osmore-gulation and water resorption, and therefore nephrogenic diabetes insipidus are present in large amount of hypotonic polyuria, polydipsia and dehydration.The authors experienced two case of nephrogenic diabetes insipidus in brothers who have polydipsia, polyuria and failure to thrive.One 8-year-old boy had been diagnosed as nephrogenic diabetes insipi- dus by clinical test at 7 years ago, but at 32 months of his age, his parents had disco- ntinued his medication.The other 14-month-old boy has been diagnosed nephrogenic di- abates insipidus by same method lately. So, we report two case of nephrogenic diabetes insipidus in brothers with the brief rev-iew of related literatures.