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154kV 지중송전케이블에서 Wavelet을 이용한 Fault Location에 관한 연구
이준성,문성철,이종범,Lee, Jun-Seong,Mun, Seong-Cheol,Lee, Jong-Beom 대한전기학회 2000 전기학회논문지A Vol.49 No.12
This paper describes a fault location technique using wavelets in underground transmission power cable system. Estimation of fault location is performed using data smapled at two ends underground system. In the case of 50% fault of total underground transmission line, fault location is calculated using sampled single-end data in underground transmission line. Traveling wave is utilized in capturing the travel time of the transients along the monitored lines between the relay and the fault point. This traveling time information is provided by the wavelet. Simulation was performed using EMTP, ATP Draw and MATLAB. The results of fault location shown in this paper will be evaluated as an effective suggestion for fault location in real underground transmission line.
듀얼 에너지 CT의 가상 단색 영상을 이용한 영상 교정 팬텀과 금속 인공음영에 관한 연구
이준성,이승훈,박주경,이선영,김진기,Lee, Jun seong,Lee, Seung hoon,Park, Ju gyung,Lee, Sun young,Kim, Jin ki 대한방사선치료학회 2017 대한방사선치료학회지 Vol.29 No.1
목 적: 이중선원 듀얼에너지 CT(DS-DECT)의 가상 단색 영상을 이용해서 영상의 질 향상과 선량학적 영향에 대한 방사선치료계획 이용의 유용성을 평가하고자 한다. 대상 및 방법: DS-DECT를 이용하여 듀얼에너지(80/Sn 140 kVp)와 싱글에너지(120 kVp) 영상을 획득하였다. 영상 교정 팬텀 실험을 위해서 40-140 keV 범위로 단색 영상을 재구성했다. 선량 측정용 고체물등가팬텀 연구에서는 64, 69, 88, 105 keV 단색 영상을 선택했다. 스테인리스 스틸을 포함한 고체물등가팬텀에 $10{\times}10cm^2$ 조사야, SSD 100 cm, 10 MV 광자선, 100 MU 조사선량, 단일빔으로 치료계획을 수립하였다. 방사선량측면도 자료는 중심축에 위치한 4개의 지점에서 구했다. 싱글에너지 CT에서 획득한 다색 영상을 기준영상으로 하고, 가상 단색 영상의 선량학적 결과를 분석하였다. 결 과: 낮은 단색 에너지 수치에서 평균 감약이 증가했다. 7개의 물질 중에서 Teflon이 에너지 의존성이 가장 컸고, 10 keV 수치 상승으로 CT number가 평균 2.48 % 감소했다. 저밀도 공기에서는 단색 에너지에 대한 에너지 의존성이 없었다. Polystyrene, Acrylic은 70 keV 이상에서 안정한 CT number를 나타내었다. CT-ED 변환 곡선은 80 keV 단색 영상과 120 kVp 다색 영상이 비슷하였다. 단색 영상의 에너지가 증가할수록 금속의 식별 능력이 향상되었다. 줄무늬 인공음영은 105 keV 단색 영상에서 높은 감소를 보였지만, 여전히 남아 있었다. 다색 영상과 비교하여 각 영상에 따른 방사선치료계획의 선량학적 차이는 ${\pm}0.7%$ 미만이었다. 결 론: 듀얼에너지 영상의 획득은 싱글에너지에 비해 피폭선량을 감소시킬 수 있고, 가상 단색 영상은 CT number 보정에 유용하였다. 향상된 영상의 질은 인체의 기하구조 묘사와 전자 밀도 분포 형성에 도움이 될 것으로 사료된다. Purpose: To evaluate the image quality improvement and dosimetric effects on virtual monochromatic images of a Dual Source-Dual Energy CT(DS-DECT) for radiotherapy planning. Materials and Methods: Dual energy(80/Sn 140 kVp) and single energy(120 kVp) scans were obtained with dual source CT scanner. Virtual monochromatic images were reconstructed at 40-140 keV for the catphan phantom study. The solid water-equivalent phantom for dosimetry performs an analytical calculation, which is implemented in TPS, of a 10 MV, $10{\times}10cm^2$ photon beam incident into the solid phantom with the existence of stainless steel. The dose profiles along the central axis at depths were discussed. The dosimetric consequences in computed treatment plans were evaluated based on polychromatic images at 120 kVp. Results: The magnitude of differences was large at lower monochromatic energy levels. The measurements at over 70 keV shows stable HU for polystyrene, acrylic. For CT to ED conversion curve, the shape of the curve at 120 kVp was close to that at 80 keV. 105 keV virtual monochromatic images were more successful than other energies at reducing streak artifacts, which some residual artifacts remained in the corrected image. The dose-calculation variations in radiotherapy treatment planning do not exceed ${\pm}0.7%$. Conclusion: Radiation doses with dual energy CT imaging can be lower than those with single energy CT imaging. The virtual monochromatic images were useful for the revision of CT number, which can be improved for target coverage and electron densities distribution.
이준성,서형식,노석선,Lee, Jun-Seong,Seo, Hyung-Sik,Roh, Seok-Seon 대한한방안이비인후피부과학회 2001 한방안이비인후피부과학회지 Vol.14 No.2
This study was carried out to prove the anti-allergic effect of SPS-GM, which is gained by controlled Cytokines making all the difference to Th2 cell development. The results were obtained as follows : 1. From the SPS-GM treatment about BMC cell, in case of the IL-4, an important factor of the Th2 cell development, SPS-GM didn't show considerable effect. 2. The INF-${\gammer}$, mutual Cytokines of IL-4, was increased more than twice. 3. Histamine from the Master cell and Nitric oxide from indisposition response were a little decreased. According to the above results, it is suggested that SPS-GM has anti-allergic effect.
확률론적 파괴역학을 도입한 CANDU 압력관의 예리한 결함에 대한 건전성평가
이준성,곽상록,김영진,박윤원,Lee, Jun-Seong,Gwak, Sang-Rok,Kim, Yeong-Jin,Park, Yun-Won 대한기계학회 2002 大韓機械學會論文集A Vol.26 No.4
This paper describes a probabilistic fracture mechanics(PFM) analysis based on Monte Carlo(MC) simulation. In the analysis of CANDU pressure tube, the depth and aspect ratio of an initial semi-elliptical surface crack, a fracture toughness value and delayed hydride cracking(DHC) velocity are assumed to be probabilistic variables. As an example, some failure probabilities of piping and CANDU pressure tube are calculated using MC method with the stratified sampling MC technique, taking analysis conditions of normal operations. In the stratified MC simulation, a sampling space of probabilistic variables is divided into a number of small cells. For the verification of analysis results, a comparison study of the PFM analysis using other commercial code is carried out and a good agreement was observed between those results.
이준성,노석선,Lee, Jun-Seong,Roh, Seok-Seon 대한한방안이비인후피부과학회 2000 한방안이비인후피부과학회지 Vol.13 No.2
1. The furuncle is nail shaped, whitch tip is sharp and root is deep, very dangerous. It's progress is so rapid and it corresponds to the acute suppurative infection of western medicine. 2. The cause and pathology of the furuncle were divided into three parts, inappropriate care (improper diet and excessive sex), surgical trauma (epidernic infection by domestic animal as like cattle, hoarses, pigs, sheep etc), external evil. 3. The early syndrome of the furuncle is swollen pain, various change of color, fidgetiness, restlessness, aversion to cold, headache, nausea and vomitting etc. Though apply acupuncture, there is no pain and bleeding. There may be streak of blood, curdy of muscles and widen swolling. If it is progressed, its sphere becomes diffuse. This is called as the serious case of furuncle(정독주황). 4. The maim treatment of the furuncle is clear away heat and toxic materials. The method was moxibustion, sticking-plaster, purge blood, oral taking the medicine of detoxication and fire extinguishing etc. 5. The main prescriptionst are omisodokyum(五味消毒飮), hwangyeonheadoktang(黃連解毒湯), ohyangyeongyotang(五香連翹湯), hyeongbangpaedoksan(荊防敗毒散) and so on. The main external prescriptionst are okrhosan(玉露散), cheonchugo(千 膏), guildao(九一丹), palyidan(八二丹), taeyulgo(太乙膏), hongyugo(紅油膏) and so on.
이준성,류현신,서형식,노석선,Lee, Jun-Seong,Ryu, Hyeon-Sin,Seo, Hyeon-Sik,No, Seok-Seon 대한한방안이비인후피부과학회 2001 한방안이비인후피부과학회지 Vol.14 No.2
In the Clinical study on 1 Case of Patient with Obstruction of the retinal artery, the results were as follows. 1. Obstruction of the retinal artery is acute disease that vision isdiminished fastly and become a blindness. 2. It belong to the cathegory of Pock Maeng(暴盲) in Oriental Medicine. 3. The causes of Obstruction of the retinal artery were the yin-deficiency of liver and kidney, the stagnation of vital energy and blood stasis, the abundance of phlegm-heat, the yang-deficiency of spleen and kidney, the yin-deficiency of spleen and kidney, the nonfastness of primordial energy etc. 4. We could get the effective result by providing the patient with Jinkansikpung-tang-gami(鎭肝熄風湯加味) in the acute period 5. In Acupuncture treament and other treament, Electro-acupuncture theraphy ana Lodestone theraphy were useo for neurologic stimulation, Body acupuncture and Auricula-acupuncture were used for promoting the circulation of vital energy and blood.
이준성,유현신,서형식,노석선,Lee, Jun-Seong,Rheu, Hyun-Sin,Seo, Hyung-Sik,Rho, Seok-Seon 대한한방안이비인후피부과학회 2001 한방안이비인후피부과학회지 Vol.14 No.2
The result were as follows: 1. Apply the drug to the Dental and Paradental digease is used to be very busy on the Gypsum Fibrosum( 石膏) and Asari herba cum Radice(細辛). 2. Apply the drug to the Dental and Paradental digease is clearing away heat and helping sweat 3. Apply the drug to the Dental and Paradental digease is cold and hot. 4. Apply the drug to the Dental and Paradental digease is pungent, bitter and sweet. 5. Apply the drug to the Dental and Paradental digease is non-toxic. 6. Apply the drug to the Dental and Paradental digease is used to be very busy on the chanel of liver and stomach.