남성화를 보이는 여성에서 발견된 난소의 Steroid Cell Tumor 1예

조인호,정대훈,박영미,서영진,손영실,정철회,강영미,정수전,김영남,이경복,성문수,김기태 인제대학교 2006 仁濟醫學 Vol.27 No.-

Steroid cell tumor is a rare ovarian sex cord-stromal tumor which accounts for 0.1% of all ovarian tumors. Until now, only 4 cases have been reported in domestic literatures. Steroid cell tumor often secrets testosterone and presents virilization in adult women or precocious puberty in children. Treatment is often performed by surgical removal, adjuvant chemotherapy and radiation, but completely accepted treatment was not existed. We experienced a case of steroid cell tumor, which was manifested by typical virilization in a 43-year old patient, who was previously performed hysterectomy and unilateral oophorectomy. So, we present with a brief review of the literatures.

하수에서 분리한 합성세제 분해균의 특성

정민선,전진경,정영건,이해경,권오진,지원대,김관배 嶺南大學校 環境問題硏究所 1993 環境硏究 Vol.13 No.1

대구시와 경산시의 하수에서 음이온계 합성세제인 sodium dodecyl sulfate(SDS)와 sodium dodecylbenzene sulfonate(SDBS)를 유일한 탄소원으로 이용하는 균주 289종을 분리하고 이중 합성세제 분해력이 강한, 그람음성 간균으로 운동성인 8균주를 선정하여 그 선정균들의 특성을 조사하였다. 선정균은 40℃ 이상에서는 생육하지 못하였으며 생육 최적 pH는 균주간에 다소 차이가 있었으며 pH 4.0 이하에서는 선정균 모두 생육치 못하였다. 질소원으로는 SDS분해균의 생육에는 potassium nitrate가, SDBS 분해균의 생육에는 soytone이 좋았다. SDS 분해균인 DS-3, 6, 8, 24 및 SDBS 분해균인 BS-7, 8은 세제농도가 5.0% 이상에서도 생육이 가능하였다. 선정균들은 tetracycline에 감수성이 강한 것으로 나타났지만 penicillin에는 강한 내성을 띠는 것으로 나타났고, ??와 ??금속이온은 모든 선정균들의 생육을 억제하는 것으로 나타났다. On purpose to isolate the organisms, which would utilize detergents(sodium dodecyl sulfate, SDS and sodium dodecylbenzene sulfonate, SDBS) as a sole carbon source, from the waste water of Kyungsan and Taegu city 289 strains were isolated. Among them 8 strains, which are gram negative rods with motility and produce strong enzyme to biodegrade the synthetic detergents, were selected. The characteristics of them were investigated as follows, 8 strains were failed to grow above the temperature of 40℃ and below the pH 4.0 even though they have variable optimum pH. Potassium nitrate was very effective for the growth of SDS-biodegradable strains and soytone was effective for the growth of SDBS-biodegradable strains as a sole nitrogen source. Among 8 strains especially DS-3, DS-6, DS-8 and DS-24(SDS-biodegradation strains) and BS-7 and BS-8(SDBS-biodegradation strains) could grow above 5.0% of detergent concentration. All of 8 strains were very sensitive to tetracycline but resistant to penicillin. Selected 8 strains were inhibited by metal ions of ??(0.156mg/㎖) and ??(0.156mg/㎖).

이동 열원을 고려한 전자빔 용접의 유한요소해석

조해용,정석영,김명한,조창용,이제훈,서정 한국레이저가공학회 2001 한국레이저가공학회지 Vol.4 No.1

Simulation on the electron beam welding of Al 2219 alloy was carried out by using commercial FEM code MARC, which encounters moving heat sources. Due to axisymmetry of geometry, a half of the cylinder was simulated. A coupled thermo-mechanical analysis was carried out and subroutine for heat flux was substituted in the program. The material properties such as specific heat, heat transfer coefficient and thermal expansion coefficient were given as a function of temperature and the latent heat associated with a given temperature range is considered. As a result, the proper beam power is 60kVX60mA and welding speed is 1~1.5 m/min. The residual stress in the heat-affected zone as well as the fusion zone does not increase. It is necessary to use jigs for preventing distortion of cylinder and improving weld quality.

ZnO:In 가스 감지막의 특성 및 응용

김영범,박종아,김진해,김권태,김정규,마대영,박기철 경상대학교 생산기술연구소 2001 工學硏究院論文集 Vol.1 No.-

The microsensors to detect NH3 gas were fabricated by continous deposition of In film by evaporation and ZnO film by rf magnetron sputtering onto the Si3N4 diaphragm that was prepared by MEMS technology. The sensors were heat-treated to dope In into the ZnO thin film. The electrical characteristics of sensitive films were studied as a function of heat-temperature by 4-point probing method and electrometer. The dependence of the sensitivity, selectivity and time response of sensor on heat-treatment temperature was investigated. The microsensor heat-treated at 400℃ that 3000 A ZnO:In film was chosen as gas sensitive film, showed the highest sensitivity 23% at 350ppm NH3 under 366mW heater power. The time response was 90sec. The sensitivity for CO and NOx was not observed.

TGase를 사용하여 재구성돈육 제조시 결착시간과 압력조건이 품질에 미치는 영향

김영붕,노정해,박은혜 한국동물자원과학회 2003 한국축산학회지 Vol.45 No.1

본 연구는 효소제인 TGase를 사용하여 돈육을 재구성시킬 때 결착시간(2시간, 4시간, 6시간 및 16시간) 및 압력조건(1㎏, 3㎏, 5㎏ 및 10㎏)이 재구성 돈육의 품질에 미치는 영향을 시험하였다. 그 결과 결착시간별에 따른 육색은 L, a, b값 모두 유의적인 차이가 없었다. 압력별에서는 5㎏ 처리구 a값이 12.81로 높게 나타났다(p<0.05). 시간별에서 인장강도는 생육에서는 6시간 처리구가 202.1±32.3g, 가열육에서는 386.0±72.9㎏ 으로 높은 값을 보였지만 처리구간 유의적인 차이는 없었다. 압력별에서는 생육에서 5㎏ 처리구가 114.6±48.9g, 가열육에서는 303.7±64.7g으로 타 처리구에 비해 유의적으로 높게 나타났다(p<0.05). 결착시간별 조직감에서 hardness, springiness, cohesiveness 및 chewiness 모두 생육 및 가열육에서 처리구간 차이가 없었다. 관능검사 결과 시간별 생육에서는 4시간 처리구가 항목에서 가장 높게 나타났고(p<0.05) 가열육에서는 4시간과 6시간 처리구가 우수하게 평가되었다(p<0.05). 또한 압력별에서는 생육 및 가열육에서 5㎏ 처리구가 각 항목 모두에서 유의차를 나타내었다(p<0.05). 따라서 TGase를 사용하여 재구성돈육 제조시 결착시간은 4-6시간, 압력은 5㎏으로 결착시키는 육색, 인장강도 및 관능적 특징에서 가장 좋다고 할 수 있겠다. This study was performed to compare the effects of binding time(2hr, 4hr, 6hr and 16hr) and pressing condition (1㎏, 3㎏, 5㎏ and 10㎏) on manufacturing restructured pork. Meat color, in terms of L, a, b showed significant difference by treatment of binding time. Five ㎏ pressing resulted in the highest red value(P<0.05). In tensile strength, 6 hour treatment showed significant difference ranging in 202.1g for raw restructured pork and 389.0g for cooked restructured pork. Five ㎏ pressing showed the highest tensile strength, 114.6 for raw restructured pork and 303.3 for cooked restructured pork. In hardness, springiness, cohesiveness and chewiness, raw and cooked restructured pork showed insignificant difference regardless of pressing time. In sensory evaluation, four hour treated raw restructured pork showed the highest values of color, binding degree, shape, acceptance, while four or six hour treated restructured pork showed the highest values in cooked restructured pork. Therefore the optimal conditions for manufacturing restructure pork using TGase were four through six hour pressing with 5㎏ pressure.

자기공명영상에서 신속 FLAIR(Fluid-Attenuated Inversion Recovery) 기법을 이용한 뇌척수액의 흐름메 관한 연구

최영철,전혜정,신현준,박정희 건국대학교 의과학연구소 1999 건국의과학학술지 Vol.9 No.-

The use of MRI to study CSF flow in the brain was mainly by flow void signal on T2WI or hydrodynamic study with phase-contrast cine MRI. Authors pay attention to high signal intensity in CSF passway on fast FLAIR MR image of the brain, usually known as the artifact. The conclusions are as below; 1. The high signal intensity appeared in CSF passway on fast FLAIR MR image of the brain near constantly. 2. The high signal intensity was best visualized on image perpendicular to the CSF flow. 3. The high signal intensity was related to the velocity of the fluid not to the direction of the fluid.

잡음환경에서 구름 볼 베이링의 결함검출을 위한 ALE의 적용

김영태,최만용,김기복,박해원,박정학,김종억,류준 한국공작기계학회 2004 한국공작기계학회 추계학술대회논문집 Vol.2004 No.-

It is very important to detect the bearing defects in rotating machinery since the critical failure of bearing cause a machinery shutdown. However it is difficult to detect the vibration signal resulting from the initial defects of bearing because of the high level of broadband noise. A signal processing technique, called the adaptive line enhancer(ALE) as one of adaptive filter, is studied in this work. This technique is to eliminate broadband noise without a prior knowledge of the noise and signal characteristics. Also we propose the optimal methods for selecting the three main ALE parameters such as correlation length, filter order and adaptation constant used in the adaptative process. Vibration signals for three abnormal bearings, including inner and outer raceways and ball defects, were acquired from Anderon(angular derivative of radius on)meter. The experimental results showed that the proposed technique can reliably detect the bearing defective signals masked by broadband noise.

CT flouroscopy를 이용한 중재적 시술의 유용성

전혜정,박정희,서보경,박상우,신현준,최영철,한혜승,이창희 건국대학교 의과학연구소 2004 건국의과학학술지 Vol.14 No.-

Conventional CT-guided needle localization has been reported many times, but a few reports of interventional procedures by using multidetector CT scan with CT-fluoroscopy have been described. We presented 36 cases of CT-fluoroscopy guided interventional procedures focusing on the puncture technique. Two cases of small pneumothorax and one case of pulmonary hemorrhage out of 2lcases after lung biopsy, were not needed any treatments We can easily and accurately access to the lesion by using CT-fluoroscopy and unique our marker system.

볼 베어링의 결함검출을 위한 Adaptive Line Enhancer의 적용

김영태,최만용,김기복,박해원,박정학,김종억,류준 한국공작기계학회 2005 한국생산제조학회지 Vol.14 No.2

The early detection of the bearing defects in rotating machinery is very important since the critical failure of bearing causes a machinery shutdown. However it is not easy to detect the vibration signal caused by the initial defects of bearing because of the high level of random noise. A signal processing technique, called the adaptive line enhancer(ALE) as one of adaptive filter, is used in this study. This technique is to eliminate random noise with little a prior knowledge of the noise and signal characteristics. Also we propose the optimal methods for selecting the three main ALE parameters such as correlation length, filter order and adaptation constant. Vibration signals for three abnormal bearings, including inner and outer raceways and ball defects, were acquired by Anderon(angular derivative of radius on) meter. The experimental results showed that ALE is very useful for detecting the bearing defective signals masked by random noise.

마이크로파 중계기용 DRO 설계 알고리즘

金永喆,李政海 弘益大學校 科學技術硏究所 2001 科學技術硏究論文集 Vol.12 No.-

In this paper, a dielectric resonator oscillator (DRO) has been designed and fabricated for Ku-band (12.4-18 GHz) microwave system of satellite communication system. The employed dielectric resonator has a dielectric constant of 38 and a quality factor (Q) of 42,000. The fabricated DRO has a center frequency of 13.64 GHz and an output power of -2.72 dBm. It also has a good frequency stability. Therefore, it is expected that the DRO designed in this paper will be successfully utilized in the design of a PLDRO.