자기공명영상용 라디오주파수 코일의 제작에 있어서 동조 및 매칭에 영향을 미치는 전기 용량 값들의 실험적 측정

양경승,신용진,김영섭,한재진,이성길,김승국,김영근,지연상 조선대학교 기초과학연구소 2003 自然科學硏究 Vol.26 No.-

Radio frequency coil which is capable of transmit and receive the signal has been used for image production in magnetic resonance imaging(MRI). Tuning and matching characteristic of radio frequency coil is major factor determining the image quality. In experiment the used coil was called a staircase type coil which is simplified the birdcage coil and referred to a simple LC resonant circuit. Because the inductance values of the coils are fixed coil performance was examined by changing of the capacitance values. In this study capacitance values were experimentally determined to increase of-tuning and matching effect in junction of the coil between coil endring and BNC cable to obtain the high quality of image.

축산분뇨 혐기소화 잔재물의 특성 및 초지 적용성 평가

김승민(Seung Min Kim),정웅기(Woong-gi Jung),성용주(Yong Joo Sung),안희권(Hee-Kwon Ahn),김동성(Dong Sung Kim),윤도현(Do-Hyun Yoon),김동섭(Dong-Seop Kim1),정광화(Hwa Gwang Jung) 한국펄프·종이공학회 2014 펄프.종이기술 Vol.46 No.3

내시경적 점막절제술로 치험한 식도 과립상 세포종 1례

강혁주,김성욱,최석진,이중현,장재식,서영범,윤병구,박건욱,김성자,김용섭,강승완,이구,양창헌,이창우,김욱년,이광헌,서정일 동국대학교 의학연구소 2000 東國醫學 Vol.7 No.-

과립상 세포종은 Schwann 세포 기원으로 생각되며 인체에 비교적 드물게 발생한다. 과립상 세포종은 전신 어느 곳에서나 발견될 수 있으나 주로 혀, 구강, 피부 혹은 유방 등에서 호발하며 드물게 위장관에서 발견된다. 위장관에서는 식도에서 가장 호발하며 다음으로 위, 대장 순이다. 과립상 세포종은 대부분, 특히 위장관에서는 양성이며 소수의 악성 병변이 보고되었다. 이러한 이유와 함께 수술 전의 진단이 어렵기 때문에 과립상 세포종에 대한 근본적인 치료는 현재까지 외과적 절제술이다. 최근에 시도되는 치료방법들로는 내시경적 레이저 치료, 용종절제술, 내시경적 점막 절제술 등이 있다. 저자들은 상부 소화관 내시경검사를 시행하여 식도 과립상 세포종을 진단하고 내시경적 점막 절제술을 시행하여 합병증 없이 퇴원하여 현재 재발없이 경과 관찰중인 1례를 경험하였기에 보고하는 바이다. Granular cell tumors, which occur infrequently, are probably of Schwann cell origin. They can occur almost anywhere in the body but usually affect the tongue, oral cavity, skin, or breasts and are rarely found in the gastrointestinal tracts. The esophagus is the most frequent gastrointestinal site, followed by the stomach and the colon. Granular cell tumors are generally benign, especially in the gastrointestinal tract, some malignant lesions have been reported. For this reason, and also because preoperative diagnosis is difficult, the standard treatment for granular cell tumor has until now been surgical excision. In recent years, other therapeutic methods is endoscopic laser therapy (ELT), polypectiomy, endoscopic mucosal resection (EMR). We report a case of esophageal granular cell tumor which was diagnosed by an endoscopy and managed using an endoscopic mucosal resection without complication.

치수제거후 흰쥐 삼차신경절에서 VIP 면역반응세포의 변화: 공초점레이저주사현미경적 연구

김흥중,김승재,박주철,박주철,이상호 대한소아치과학회 2001 大韓小兒齒科學會誌 Vol.28 No.1

말초신경 손상에 의한 VIP의 변화를 연구하기 위해 흰쥐 하악대구치 치수제거 후 삼차신경 절에서 VIP의 분포 및 반응강도를 공초점레이저주사현미경을 이용하여 관찰하였다. 체중 200g내외의 Sprague-Dawley계 흰쥐를 대조군과 하악대구치 치수제거 후 14일군으로 분리하여 희생시켰다. 1차 항체로 rabbit anti-VIP, 2차 항체로 fluorescein isothiocyanate(FITC) conjugated anti-rabbit IgG를 사용하여 면역형광염색을 시행한 후 공초점레이저주사현미경으로 관찰하여 다음과 같은 결론을 얻었다. 1.삼차신경절 하악부위에서 VIP 양성반응세포의 비율은 대조군에서 7.40%를, 실험군에서는 28.42%를 보였다. 대조군에 비해 실험군에서 양성반응세포의 증가를 보였다. 2.삼차신경절 하악부위에서 VIP 면역반응세포체에 대한 상대성 형광강도는 대조군에서 87.78을, 실험군에서는 138.65를 보였다. 대조군과 비교하였을 때 실험군에서 상대성 형광강도의 증가를 보였다. 3.실험군의 광연속절편(1㎛) 관찰에서 VIP 면역반응세포는 9개의 절편 대부분에서 강하게 나타났다. 축삭의 면역반응을 살펴보면, 대조군의 축삭에서는 약한 반응을 보였으며, 실험군의 축삭에서는 강한 면역반응을 보였다. 또한 양성반응 세포체의 크기는 20∼25㎛의 중간 크기의 세포체에서 강한 면역반응을 보였다. 위의 결과로 보아 치수제거 후에 삼차신경절 하악부위에서 VIP면역반응세포의 증가와 함께 상대성 형광강도가 높아졌음을 알 수 있었다. The purpose of this study was to investigate the distribution and fluorescence intensity of vasoactive intestinal polypeptide immunoreactive(VIP-IR) cells in rat trigeminal ganglion following pulp extirpation of rat mandibular molar. The animals were divided into control group(n=6) and experimental group(n=6). The experimental animals were sacrificed at 14 days after pulp extirpation. The trigeminal ganglion was removed and immersed in the 4% paraformaldehyde in 0.1M phosphate buffer. Serial frozen sections about 20㎛ in thickness were cut with a cryostat The immunofluorescence staining was performed. The rabbit anti-VIP(1:8,000) was used as primary antibody and fluorescene isothiocynate(FITC) cojugated anti-rabbit IgG(1:80) as secondary antibody. The slides were observed under confocal laser scanning microscope(CLSM). Unprocessed optical sections were obtained and stored on a optical disk. Color pictures were printed by a video copy processor. The results were as follows ; 1. The positive ratio of VIP-IR cells in mandibular part of trigeminal ganglion were 7.40% in control group and 28.42% in experimental group(14 days affter pulp extirpation). 2. The relative fluorescence intensity of VIP-IR cells in mandibular part of trigeminal ganglion were 87.78 in control group and 138.65 in experimental group. The relative fluorescence intensity of experimental group was 58% higher than that of control group. 3. In optical serial section analysis of VIP-IR cells of experimental group, most of the 9 section showed high fluorescence intensity. At high magnification, axons of the experimental group displayed greater VIP-IR than in the control group, and the positive cells were mainly of medium size. The result indicate that number and fluorescence intensity of VTP-IR cells were increased in the mandibular part of trigeminal ganglion following pulp extirpation of mandibular molar, and it suggests that VIP could play a role in processing of nociception.

당뇨병성 말초신경병의 평가에 대한 전류감지검사의 임상적 유용성

김승현,심충섭,김주한,김명호 대한신경과학회 1998 대한신경과학회지 Vol.16 No.5

부착형 고분자 압전센서를 이용한 탄성파 검출 연구

김기복,윤동진,권재화,이영섭,이승석 한국비파괴검사학회 2003 학술대회 논문집 Vol.- No.1

스마트 구조물에 적합한 탄성과 검출 센서로서 고분자 압전 필름을 이용한 부착형 센서에 대한 연구를 수행하였다. PVDF와 copolymer에 대하여 센서로서의 특성을 평가하였으며 상용화된 PZT 센서와 비교하였다. 탄성과 속도와 음향임피던스가 서로 여러 가지 재료에 고분자 압전필름 센서를 부착하여 연필심 파괴 시 발생하는 탄성파를 검출하여 분석하였다. 센서의 직경이 증가함에 따라 검출 신호의 피크 전압은 증가하였으나 센서의 dynamic range는 감소하는 것으로 나타났다. 시편의 음향임피던스가 감소할수록 검출신호 파형의 피크 값은 증가하였으며 주로 저주파수의 주파수 성분의 신호에 민감한 것으로 분석되었다. Copolymer 센서가 PVDF 센서보다 감도 면에서 다소 양호한 것으로 나타났다.

利潤函數의 計量的 模型에 관한 小稿

金東燮,韓昇熙 公州大學校 産業開發硏究所 1993 産業開發硏究 Vol.1 No.-

Generally, A numerical estimation of production in agriculture sector is made by production function, and indirect cost and profit function that apply the duality with production function. In our approach, Traditionally it is measured by production and indirect cost function. But, by utilizing the duality of production and indirect profit function, it also is possible. The parameters of profit function in estimating production function are 1. The parameters of production function can be efficiently measured. 2. Factor demand and supply function are directly derived from the UOP profit function. 3. It is possible to test the statistical hypotheses of constant return to scale, economic efficiency between farmer groups, and measure the variable input demand elasticities, output supply elasticities, and so on.

구강악안면 영역의 치성 감염 환자에 대한 세균학적 연구

김일규,윤승환,오성섭,최진호,오남식,김의성,이성호,배수환,강문수 대한악안면성형재건외과학회 2000 Maxillofacial Plastic Reconstructive Surgery Vol.22 No.4

Oral & maxillofacial infections are most commonly odontogenic in origin. Although such infections are usually self-limiting, they may occasionally spread deeply into fascial spaces or planes far from the initial site of involvement. If early diagnosis and appropriate therapy is delayed, complications such as mediastinal extension, retropharyngeal spread and airway obstruction could happen to the patients. For the study of the microbiology, we have retrospectively analysed the oral & maxillofacial infected patients in the Dept. of Oral & Maxillofacial Surgery, In-Ha University Hospital from 1997 September to 2000 April. The results were as follows 1.The male patients were more common than female, with male 61.9% and female 38.1%. 2.Dental originated infections were most common cause with the incidence of 62%. 3.Most common fascial space involved was buccal space 42cases(37.2%) followed by submandibular space 13cases(11.5%), infraorbital space 13cases(11.5%), masseteric space 11cases(9.7%) , periapical abscess 11cases(9.7%) . 4.The causative organisms isolated from the pus culture were Gram Positive Bacterial species, which were 46cases(31.9%) of Streptococcus viridans, 16cases(8.6%) of α and β-hemolytic streptococcus, 4cases(3.1%) of Strep.-group D non enterococci, 7cases(5.1%) of Staphylococcus Coa. Neg., 5cases(3.9%) of Staphylococcus aureus, 3cases(2.3%) of Enterococcus faecalis, 1case(0.8%) of Bacillus species, 1case(0.8%) of Peptostreptococcus, 1case(0.8%) of Clostridium and Gram negative bacterial species, which were 4cases(3.1%) of Acinetobacter baumannii, 2cases(1.6%) of Pseudomonas aeruginosa, 2cases(1.6%) of Burkholderia cepacia, 1case(0.8%) of Neisseria species, 1case(0.8%) of Klebsiella pneumoniae, 1case(0.8%) of Klebsiella oxytoca, 1case(0.8%) of Escherichia coli. 5.In drug sensitivity test, high resistant tendency was found in Penicillin system(Penicillin G 83.3%, Ampicillin 60%) and Aminoglycosides (Gentamycin 50%, Tobramycin 45.5%), but tertiary Cephalosporin system(Cefoperazone 9.1%, Ceftazidime 18.2%), and glycopeptides system (Teicoplanin 0% , Vancomycin 0%) showed lower resistancy.

오존 발생기용 전원장치 개발 및 특성에 관한 연구

김동희,이달해,성현직,오승훈,이봉섭,배상준 嶺南大學校 工業技術硏究所 1997 工業技術硏究所論文集 Vol.25 No.1

The power semiconductor switching devices(PSSD) continuously developed, Power Electronic Technology using PSSD is gradually extended. The high frequency inverter to generate the large power high frequency subject to power electronic technology pursuit various application. Also, in emboss with environmental destruction problem cause the atmosphere and the water pollution to growth of the commercial society, the research in favor of cleansing environmental a pollutant actively proceed. Cause of having a strong oxygenization in the physical world, the ozone has sterillization effect predominantly against virus, bacteria, etc and has application in decolorization, deodorization, food storage and air cleansing and has a merit that does not cause the secondary pollution by being restored to oxygen lastly. Therefore, This project describe study on the ozone generation power supply using the high frequency electric field method and the lamp type ozone generator using photochemistry, one of method of generate ozone.

HEC-RAS/GIS를 이용한 홍수 범람지역 분석

안승섭,이증석,김종호 한국환경과학회 2004 한국환경과학회지 Vol.13 No.1

The purpose of the study was to construct a forecast system of flood inundation area at natural stream channels. The study built the system to interpret the flood inundation area in four stages ; constructing topography data around the stream channel, interpreting flood discharge, interpreting flood elevation in the stream channel, and interpreting the flood inundation and mapping. According to the result of the analysis, as for the characteristic of flood inundation around the area within the purview of this study, although there were areas where flood inundation over a bank caused a flooded area, the failure of the internal drainage in the ground lower than flood elevation caused more serious problems. Rather than the existing method where only the estimated flood elevation data is used based on the hydrographical stream channel trace model(such as the HEC-RAS model) to establish the flood inundation area, if the procedure introduced in this study was applied to interpret the floodplain, actual flood inundation area could be visibly confirmed.