Bi계 산화물 초전도체 2212상에 있어서 Bi 자리에 Ge 치환에 따른 초전도 특성

신재수,이민수,최봉수,송승용,송기영 대전산업대학교 반도체기술연구소 2000 半導體技術硏究所報 Vol.2 No.-

고상반응법(solid-state reaction)으로 산화물 초전도체 Bi_2-xGe_xSr_2CaCu_2O_8+8(x=0, 0.1, 0.2, 0.3, 0.4, 0.5)을 제조하여 치환에 따른 산소량의 변화가 초전도 특성에 미치는 영향에 관하여 조사하였다. 이차 가압(intermediate press) 방법으로 제조한 시편은 온도 폭 △K(온도 임계온도 T_c^on과 영저항 임계온도 T_c^zero와의 차)가 상당히 감소함을 알았으며 80 K 단일상 고용한계는 Ge 치환량이 x<- 0.3영역임을 알았다. 고용한계 영역 내에서 Ge 치환량 x의 증가에 따라 격자상수 c가 감소함을 보였으며, 온셋 임계온도 T_c^on은 증가하였고, 과잉(여분) 샨소량은 감소함을 보였다. Samples with the nominal composition, Bi_2-xGe_xSr_2CaCu_2O_8+8(x=0, 0.1, 0.2, 0.3, 0.4, 0.5) were prepared by the solid-state reaction method. We have studied the effect of substitution Ge for Bi and investigated the superconducting properties by changing oxygen content with Ge substitution. It was found that temperature difference, △K, between T_c^on and T_c^zero was considerably smaller in the samples prepared by the intermediate pressing method than that in the samples by the solid-state reaction method. We found the solubility limit of Ge to the 80 K single phase, the onset critical temperature T_c^on increased and excess oxygen content decreased with increase of x.

판막 질환에서의 심근 섬유화 : 심근 조직을 이용한 형태학적 연구 및 혈청 생화학적 지표의 분석

강수진,박덕우,송재관,박경민,송종민,강덕현,한기훈,송현,이재원,주석중,송명근,김정선 대한순환기학회 2004 Korean Circulation Journal Vol.34 No.2

담관계 감염증에서 혈액 및 담즙배양 균주의 특성과 항생제 감수성

송재훈,이철환,김양수,이성구,이근찬,민영일,김명환 대한감염학회 1994 감염 Vol.26 No.1

During a three-year period, 600 patients were admitted to the Asan Medical Center because of biliary tract diseases. Both aerobic and anaerobic cultures were performed in 313 patients with cholangitis (bile : 253, blood : 113, both : 53). Of these patients, 189 were positive(bile 159. blood 68. both 38). The most common organisms were E. coli, K pneumoniae, and P. aeruginosa in both bile(respectively, 49.7%, 20.8%, 51.5%) and blood cultures(respectively, 45.6%, 26.5%, 22.1%). Antibiotic therapy did not sterilize bile, but selectively increased the proportions of P. aeruginosa. There was no significant difference in biliary bacteriology according to the history of biliary surgery, or the presence of percutaneous biliary drainage or underlying disease. More than 95% of gram-negative organisms isolated was highly susceptible to imipenem and amikacin. P. aeruginosa was resistant to ceftazidime in 63.3% which might be associated with overuse of the drug during the study period. Further studies will be necessary in patients with cholangitis to determine whether newer antibiotics replace previous combination therapy.

Converter用 Tow의 Shuffling에 關한 硏究

宋在守,成秀光 嶺南大學校 工業技術硏究所 1974 연구보고 Vol.2 No.1

tow 內部의 filament 中, 外力의 對해서 뭉쳐 同一擧動을 하는 filament 集團의 解除手段으로 切斷部에 들어가기 직전 tow에 機械的 shuffling을 부여하여 그 集團牲을 解除할 수 있다. 本 硏究에서는 擦法, beat法을 shuffling의 基本方法으로 해서 各試料 tow에 여러가지 變化를 주어, shuffling 作用을 加해 顯徽鏡寫眞에 依한 定量評價 했고 또 그 實驗結果에서 얻은 結論을 基礎로 해 兩者를 利用한 最適機械的 shuffling 機構를 考察했다. Some of tow inside filaments, when they received the outside force (specially, draft force), form a group of filaments operating in combination at the same time. As a result of giving mechanical shuffling to the tow just before putting cutting-part in order to dissolute their group property, it could be removed. In this study, by using frictional method and beat method with the elementary method of shuffling, after giving various changes to each sample tow, adding shuffling operation about it, quantitative valuation has been done by microphoto-graphy and on the basis of conclusion forming from above experimental result, the most mechenical shuffling mechanism which use the above two methods has been studied.

세기변조방사선치료의 선량분포 검증에 관한 연구

권수일,신동호,송재영,안진호 京機大學校 2006 論文集 Vol.50 No.-

Film dosimetry as a part of patient specific intensity modulated radiation therapy quality assurance (IMRT QA) has been accomplished to develop the new optimization method of film isocenter offset and to suggest the new quantitative criteria for film doimetry after optimization. Five patients with head and neck cancers were measured in IMRT dosimetry by film method. Optimization method with the local minimum was developed to adjust the film isocenter offset error, which is the biggest part of systemic errors. The mean ratios were 5.33% and 7.09% for 5mm and 1 mm resolution dose data optimization respectively.

소음성 난청 선별검사용 문진표의 유용성

송재석,최병수,원종욱,노재훈 大韓産業醫學會 2000 대한직업환경의학회지 Vol.12 No.4

목적 : 소음 특수건강진단시 문진표의 유용성을 알기 위하여 실시되었다. 방법 : 자료로는 전국을 5대 권역으로 나눈 후 연구에 협조적인 산업보건기관을 대상으로 하여, 소음성 난청이 발생한 사업장과 그 부서에 대하여 정상인 근로자의 검진기록과 작업환경측정 기록 및 문진표를 수집하여 분석하였다. 결 과 : 각각의 문진 항목과 청력이상 여부에 대한 분석결과, 귀에서 소리가 난다고 하는 항목과 최근 작은 소리가 잘 안들린다고 하는 만성 특이적 항목만 청력이상 여부와 관계가 있었고, 급성 항목들은 청력 이상 여부와 통계적 연관성이 없었다. 또한 7개의 설문 항목과 연령 및 근무경력만을 이용하여 청력이상을 판정한다고 하였을 때, 실제 건강진단 결과와 비교하게 되면 민감도, 59 %, 특이도, 88 %로 계산 되었으며, 평균 23 %정도가 잘못 분류되었다. 결 론 : 만성적이고 특이적인 항목을 위주로 한 단순하고도 판별력있는 항목의 개발이 필요하며, 이러한 항목들을 전산화하였을 때, 효과적인 소음성 난청의 선별검사 체계를 구축할 수 있을 것이다. Objectives : This study was performed to investigate the effectiveness of the questionnaire. Methods : Workers'health examination records, work environment record, and questionnaires of selected industries as samples were analysed using logistic regression analysis and discrimination analysis Results'Cases of bearing impairment (Dl+C) as dependent variables, and age, work duration and level of environmental noise as independent variables were selected for multiple unconditional logistic regression analysis. Odds ratio was 4.04 in hearing difficulty, 2.78 in tlnnitus and 1.08 in age. In the second analysis Noise induced hearing loss is selected as dependent variable. The OR in hearing difficulty was 3.67(95 % C.1. : 1.61 8.61), and was 1.09(95 % C.1. : 1.05-1.14) in age. Conditionnal multlple logistic regression analysis was performed. In hearing impairment as dependent variable, the OR of age was 1.02(95 % C.1. : 1.00-1.04) and other variables were not significant. However, NIHL as dependent, the OR of hearing difficulty was 4.57(95 % C.1. : 1.43-14.67). According to multiple logistic regression adopting each items of questionnaire as dependent variable, the only item of hearing difficulty showed significant difference with hearing ability. The discrimination analysis was performed with the class variable of hearing impairment, and discrimination variables of age, work duration, and environment noise level. The sensitivity of 59 %, and specificity of 88 %, and average error count of 23 % were obtained. When the numbers of items answered in questionnaire were assumed as the parameter of judgement for noise induced hearing loss (NIHL), the highest sensitivity and specificity were 33.5% and 49.0% in cases of more than two items answered. Conclusions : The development of items that is simple and discriminative mainly consisted of chronic and specific diseases related items is needed. Computerization for newly developed items might be needed to establish effective surveillance system for NIHL in the future.

화상처리를 이용한 디버링 가공물의 품질 측정

송무건,백재용,신관수,유송민 한국공작기계학회 2001 한국공작기계학회 춘계학술대회논문집 Vol.2001 No.-

In this study a vision system with image processing method have been introduced to find the edge radius of curvature. It was applied to inspect the edge quality of the de burring process product with brush grinding. Size of data was found to be critical in calculating the radius of curvature. Results using laser measurement system were compared.

製織工業에 있어서의 品質管理(2) : Control of Sizing Process(2) 加糊工業의 管理(2)

宋在守 嶺南大學校工業技術硏究所 1992 연구보고 Vol.20 No.2

In part II, the process control methods of sizing machine were studied as follows. 1. It is current circumstances that most of factories cannot control the mixture of sizing agent ratlionally because of the many defects of installations. It is necessary to repair these defect as soon possible and the time and temperature control in the cooker should be more emphasized. 2. The important point of the process control of the size box is the temperature, concentration and viscosity of the sizing solution. If the process control of the high pressure squeeze roller which is one of the problems these days could be kept strictly, it can be reduced the ratio of the absorbed amount of the size, energy and it is possible to get the higher productivity of the weaving process. 3. The most important process control of the sizing machine is tension and draft control. It is easy to neglet these tension and draft control because of learning towards the emphasis of the importance of the productivity of the sizing machine. If they are neglected, it resulrts in bad effect on the yarn quality or the fabric quality. 4. About the energy saving or prevention of the environmental pollution which became a social recently, they ahould have more careful management and research and development should be more invested in the aspect of economics.

심부 매복 정중 과잉치 수술 시 마취방법 선택

민수영,송제선,이제호,최형준,손흥규,김성오 大韓小兒齒科學會 2012 대한소아치과학회지 Vol.39 No.1

Supernumerary tooth occurs most frequently at premaxilla area. Followed by mandibular premolar area, mandibular fourth molar area, maxillary paramolar area. Mesiodens are mainly impacted in the palatal area and surgical approach is made at palatal side. The time of surgery remains controversial. In case of inverted or horizontal impacted supernumerary tooth, intraosseous tooth movement and vertical growth of premaxilla makes surgical extraction more difficult. And also the more quantity of removed bone is, the higher degree of difficulty is. Inverted mesiodens of these cases were impacted superior to apex level of adjacent permanent incisor. Although CT examination revealed exact location of impacted tooth, surgical procedure including ostectomy may take a long time more than expected. So, before surgical extraction, it’s need to be considered several factors such as necessity of CT taking, degree of difficulty, direction of surgical approach, necessity of general anesthesia etc. 정중 과잉치(mesiodens)는 대개 상악 절치부에서 발견되며, 주로 구개측에 위치하는 경향이 있다. 정중 과잉치의 자연맹 출 가능성이 관찰되면, 주기적으로 검사하여 구강내로 충분히 맹출한 후에 단순발치를 시행한다. 주기적 검사에서 자연맹출 소견이 보이지 않거나, 형태이상 혹은 맹출방향의 이상으로 구강 내로 자연맹출 할 가능성이 없으면, 수술적 제거방법을 고려 해야 할 것이다. 특히, 인접한 중절치나 측절치의 맹출을 방해하고 있는 상황이 관찰된다면, 빠른 시일 내에 과잉치 제거를 위 한 수술적 방법을 시도하는 것이 타당하다. 한편, 외과적 수술의 시기를 늦추는 것을 고려해야 하는 경우도 있다. 정중과잉치가 인접하여 발육중인 정상 치아의 맹출을 방해하지 않는 경우이다. 이때, 삼차원 CT사진을 촬영하여보면, 과잉치 주변으로 영구절치의 치배가 근접하여 성곽처럼 둘러 싸고 있는 것을 볼 수 있다. 미성숙한 치배가 둘러 싸고 있는 상황에서, 무리하게 과잉치를 제거하려고 시도할 경우 인접 치배 를 손상시킬 가능성을 배제하기 어렵다. 이 점을 고려 한다면, 가급적 인접한 치아의 치근이 보다 발육한 후에 수술을 시도하 는 것이 바람직할 것이다. 초등학교 2학년 이상의 어린이들은 외래에서 국소마취하 제거하는 수술방법에 대개 잘 적응하며 고학년이 될수록 보다 수월해진다. 수술시기를 너무 늦추거나, 과잉치가 너무 늦게 발견된 경우 구개측 심부로 깊이 이동한 것을 볼 수 있다. 때로는 과잉치의 위치가 처음부터 심부에 매복되어 있을 수 있다. 이와 같은 경우, 전신마취방법을 생각해 볼 수 있을 것이다. 본 증례는 상악 정중부의 깊은 부위에 역위 매복된 과잉치를 외래에서 국소마취하에 치료를 시도할 때 관찰되는 문제점을 고찰하였고, 전신마취방법을 결정하기 위한 기준을 제시하였다. 심부 매복된 치아의 외과적 발거시 어린이의 행동조절이 가장 큰 문제였으며, 방사선 소견상 과잉치 치관의 위치가 절치의 치근단보다 상방에 위치할 경우 전신마취로 전환 하는 것이 바람직 할 것으로 사료된다.

Baculovirus를 이용한 Aujeszky's Disease Virus gⅢ 단백질 발현

송재영,이중복,현방훈,박종현,김병한,권창희,전무형,안수환 충남대학교 생물공학연구소 1993 생물공학연구지 Vol.3 No.-

The g Ⅲ gene located in U_L region of Yangsan strain, a field isolate of Aujeszky's disease virus (ADV) in Korea, was cloned into pTZ18R and sequenced. The gⅢ gene consisting of 1,437 nucleotides showed 98% sequence homology with that of Becker strain, a reference strain of ADV. The gene encoding gⅢ of Yangsan strain was placed under the control of Autographa californica nucleopolyhedrosis virus (AcNPV) polyhedrin promoter, and expressed by the derived recombinant baculovirus using Spodoptera frugiperda 9 (Sf9) cells. The expressed gⅢ was a protein with molecular weight of 72kd determined by immunoprecipitation and Western blotting assay using anti-ADV polyclonal antibodies and anti-gⅢ monoclonal antibody. The partially purified gⅢ protein was utilized as antigen in the radial immunodiffusion enzyme assay (RIDEA) to detect to specific antibody against ADV in pig sera. The results indicated that the sensitivity of RIDEA with the recombinant gⅢ protein antigen (98%) was as high as that with the conventional glycoprotein antigen extracted from the ADV infected cells. In addition, the false positive and false nagative reactions in gⅢ RIDEA were significantly reduced than the conventional glycoprotein RIDEA as judged from the results of standard serum neutralization test.