鋼의 酸洗廢液을 利用한 Mn-ferrite 磁性잉크 製造에 관한 연구

車東德,徐利洙,金營三 동아대학교 공과대학 부설 한국자원개발연구소 1990 硏究報告 Vol.14 No.2

This papper describes the results on formation of Mn-ferrite particles to be used in making magnetic ink from the picking liquor of steel which contain 8.9wt% of Fe ion (in which ㏖ ratio of Fe^(2+)/Fe^(3+)=1) and 1.5-5.0 ㏖ ratio of Fe/Mn^(2+) under conditions of pH 11, temperature of 80℃, air blowing rate of 100cc/sec. 1) Mn-ferrite particles at Fe/Mn^(2+) ㏖ ratio if 1.5-5.0 were of ultra fine sizes less than 180 angstrom. 2) It was possible to produce magnetic ink by coating the oleic and sodium dodecyl benzene sulfonate on the surface of the Mn-ferrite particles made from the waste pickling liquor of steel and dispersing them into water. 3) As the result of filtering from the picking liquor of steel, the residue concentrates of the filterate solution were conformed to be mainly of Cl, Cr^(3+), Cr^(6+), and Zn with their conncentrations of 2690, 0.021, 0.084 and 0.021 ppm respectively. Accorddingly, it may not be a problem as a foul water of urban.

군 훈련병의 스트레스, 성인 주의력결핍 과잉행동장애 증상과 자살사고의 연관성에 관한 연구

이동윤,이철순,박철수,손진욱,김봉조,차보석,이소진 대한생물치료정신의학회 2011 생물치료정신의학 Vol.17 No.2

Objectives:This study is conducted to investigate the effect of Attention Deficit and Hyperactivity Disorder(ADHD) symptoms on stress and suicide idea among 224 conscripts. Methods:Total number of subject is 224 conscripts. We evaluate symptoms of adult ADHD with Korean-Wender Utah rating scale(K-WURS) and Korean adult attention-deficit/hyperactivity disorder scale(K-AADHDS), stress with Brief Encounter Psychosocial Instrument-K(BEPSI-K), suicide idea with Scale for suicide ideation(SSI) after basic military training. Multivariate logistic analysis with backward stepwise selection is performed to evaluate risk factors of stress. Multiple linear regression analysis with stepwise selection is performed to evaluate association of suicide idea with adult ADHD symptoms. Results:Stress is significantly associated with K-WURS score, K-AADHDS score and SSI score(p<0.01, p<0.05, p<0.01). K-WURS score are significant risk factor of stress after basic military training(p<0.05, O.R : 1.034, 95% CI : 1.005-1.065). And K-WURS score influence suicide idea after basic military training(p<0.05, β : 0.031). Conclusion:The result suggests that K-WURS score might be a risk factor of stress and could affect suicide idea.

불소함유 그라프트 공중합체의 표면특성

차미선,소원욱,박인준,김동권,이수복,ShiYuan, Cheng 한국공업화학회 2003 응용화학 Vol.7 No.2

The graft copolymer, consisting of a flurorinated macromer(F-macromer) and a 2-(dimethyl amino)ethyl methacrylate, were prepared by marcromonomer technique and radical copolymerization. In this study, the surface propeties of the graft copolymer and its additive effect on the surface energy of polymer film were compared with the random copolymer of poly(perfluoroalkyl ethyl acrylate)-r-poly(2-dimethylamino ethyl methacrylate)(PFA-r-P(2-DMAEMA)). The contact angles of the surface modified by the graft copolymer is large than that of random copolymer with similar FA monomer content, and surface free energy of the substrate containing 0.01wt% of the graft copolymer is similar with that of 0.1wt% random copolymer surface. That is, The low-energy modification effect of the graft copolymer is better than that of the random copolymer.

음성분석에 입각한 자동코드화 방식의 신경외과계 환자관리 시스템

차은종,김영규,이태수,채수일,김동호,이무섭 충복대학교 의과대학 충북대학교 의학연구소 1994 忠北醫大學術誌 Vol.4 No.1

신경외과계 입원환자의 퇴원요약기록을 전산관리하는 시스템을 개발하였다. 주기억장치 4MB와 보조기억장치 120MB HDD를 장착한 PC-386DX시스템을 기반으로 개발하였고 소프트웨어로는 FoxPro V2.0을 사용하였다. 퇴원 요약기록의 관리시 중요한 항목인 진단명은 통상 사용하는 진단명 그 자체를 입력한 후 해당코드를 자동으로 색출해내는 자동코드화 방식을 사용하였다. 그러나 오류 코드가 발생하기 쉬운 패턴분류 방식을 지양하고 입력오류 발생시 입력진단명을 음성분석하여 음원이 동일한 유사코드를 찾는 음성분석 방식을 취하였다. 두개이상의 유사코드중 사용자가 정확한 코드를 선택하도록 하여 오류코드를 방지하였다. 논리연산조건식을 사용한 검색을 실현함으로써 다양하고 융통성있는 검색기능을 보장하였고 편리한 자료관리 방식이 가능하여 비전문가라 할지라도 손쉽고 편리하게 사용할 수 있었다. 신경외과계 입원환자를 대상으로 사용한 결과 그 실용성을 입증할 수 있었다. A discharge summary data management system was developed for neurosurgical patients. The system, written in FoxPro V2.0, ran on a PC-386DX system equipped with 4MB main memory and 120MB HDD. Automated coding was implemented by comparing the input diagnosis onto the description of the possible code list. However, any alphabet pattern classification techniques were prevented, instead sound analysis was performed on each word of the input diagnosis using the internal sound function of FoxPro software. On an input typing error, the diagnosis codes of similar sound characteristics were presented on screen so that the user selects the accurate diagnosis. This eliminated coding error inevitable for any pattern classification techniques. Data search function of the present system was very powerful and flexible, since the system performs the data search based on the user defined logical equation. In addition, the database management was easy for any inexperienced users to apply, minimizing accidental data loss. The system was tested in the neurosurgery ward and evaluated to be practical and useful.

고온온열치료를 위한 전극과 보루스의 최적모델에 관하여

차동수,서을원 안동대학교 기초과학연구소 1998 基礎科學 硏究論文集 Vol.9 No.1

고온온열치료에 있어서 전극의 크기와 이에 적당한 보루스 크기는 암치료를 보다 효율적으로 행하기 위해 매우 중요함에도 불구하고 이에 대한 체계적인 연구는 거의 없는 형편이다. 이에 전극과 보루스의 최적인 모형을 제시하고저 영남대학교 의료원 방사선 종양학과에 내원한 환자를 대상으로 하여 다음과 같은 결과를 얻었다. 1. 평균 체폭과 두께는 흉부에서 29㎝, 20.6㎝, 상복부에서 28.2㎝, 20.1㎝, 골반부에서 31.5㎝, 18.3㎝으로 계측되어 30㎝ 이하의 전극이 적합한 것으로 조사되었다. 2. 15㎝, 20㎝, 25㎝과 30㎝의 전극의 크기에 각각 5㎝, 10㎝ 더 큰 보루스를 조합하여 펜텀과 인체실험을 한 결과 펜텀과 인체실험 모두에서 25㎝ 크기의 전극에 35㎝의 보루스를 복부 및 둔부에 사용하였을 경우와, 복부에 35㎝의 보루스, 둔부에 30㎝의 보루스를 사용했을 경우 온도 분포 및 환자의 내구성이 가장 좋았다. 이는 골반부위의 평균 체폭이 31㎝, 두께가 19㎝ 미만이었던 환자에게 실험체 두께의 1.5배의 전극을 사용하는 것이 가장 이상적이라는 기존의 개념에서 볼 때 28.5㎝의 전극을 쓰는 것이 가장 이상적일 것이었으나, 25㎝ 전극에서 가장 온도분포가 좋아 적어도 우리 나라 사람들의 치료에는 기존의 개념이 맞지 않음을 입증하였다. Hypothermia treatment using high temperature (38.5-43℃) has two roles for cancer treatment, which can kill tumor cell directly and can enhance the cytotoxic activity by combination with radiation therapy or chemotherapy. For both activities, electrode and bolus have essential role in depth of homeogenous heat distribution and reducing edge effect which is main obstacle for patient`s tolerance. In spite of these important role, exact data has not been established and most institutions use rough experimental data from foreign countries. Temperature distributions by hypothermia treatment are very sensitive by body fat condition, which Korean is very different from western people that means we could have big error by adoption of western data. Purposes of this study are 1) to estimate average body width and thickness at the level of thorax, upper abdomen and pelvis of Korean, 2) to estimate proper size of electrode, 3) to estimate the pattern of heat distribution by various electrode-bolus combination in phantom and 4) to decide proper electrode and bolus combination for human body. Estimated average width and thickness were 29㎝, 20.6㎝ at the thoracic level, 28.2㎝, 20.1㎝ at upper abdominal level, 31.5㎝, and 18.29㎝ at pelvic level. These data suggested that we may use lesser than 30㎝ diameter of electrode. Data from various combinations of electrodes and boluses, 25㎝ electrodes with 35cm bolus combination showed relatively good heat distribution and tolerance in patients. These data suggested that conventional concept which ideal electrode size should be 1.5 times bigger than subject`s thickness would be not correct, at least for Korean body, probably due to different body-fat distribution compare with western people. We concluded that our study may be the standard concept for hypothermia treatment in Korea and contribute to better results for cancer treatments.

QT연장 증후군 환자에서 Head-Up Tilt Test에 의해 유발된 Torsades De Pointes 1례

전익수,차태준,김길수,김동완,김규종,김찬욱,김성만,주승재,이재우 대한순환기학회 2000 Korean Circulation Journal Vol.30 No.8

중등도 심부전증 환자에서 Carvedilol의 치료 효과

차동훈,차영수,국진환,황경화,김형태,임상욱,김태용,조윤경,박필원 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.4

만성 콩팥병 환자의 acyclovir에 의한 인지기능 변화와 이상운동증 : 증례보고

차민주, 김지선, 방희제, 신동익, 이성현, 이상수 충북대학교 의과대학 충북대학교 의학연구소 2016 忠北醫大學術誌 Vol.26 No.1

본문참고

서울의 Penicillinase Producing Neisseria Gonorrhoeae 발생빈도(1996)

김재홍,황동규,전재홍,김윤석,김중환,김용준,이창균,임동진,김현수,조창근,김경문,박상훈,전우형,김희성,이호정,차명수,김갑형,김형석,김석우,황지환,박병순,권오상,이민수,송기훈,성소영,이인섭,부태성 대한화학요법학회 1999 대한화학요법학회지 Vol.17 No.2

Background : In recent years, gonorrhea has been panedemic and remains one of the most commom STDs in the world, especially in developing countries. Objective & Methods: For the detection of a more effective therapeutic regimen and assessing the prevalence of PPNG, we have been trying to study the patients who have visited the VD Clinic of Choong-Ku Public Health Center in Seoul since 1980 by means of the chromogenic cephalosporin method. Results: In 1996, 139 strains of N. gonorrhoeae were isolated, among which 53(39.0%) were PPNG. Conclusion: Our results suggests that after a peak of 74.3% in 1993, the prevalence of PPNG in Seoul is gradually declining.

Post-cleft Defofmity의 치험례

백세민,김수신,김동일,김우경,차진한 大韓成形外科學會 1988 Archives of Plastic Surgery Vol.15 No.4

There is increasing demand by cleft patients for improvement in their esthetic appearance and occlusion. Cleft lip and palate deformoty is a multifaceted problem. It is important to consider the underlying skeleton of the face as well as the covering soft tissue. With proper presurgical planing such as photographic, cephalmetric and dental cast analysis, the two jaw osteotomy and other procedures were performed simultaneously in 6 post-cleft deformity cases. We improved their facial appearance and occlusion. Their acceptance and satisfaction are exceptionally high.