제 1형 신경섬유종증 환자에서 발생한 위장관 간질종양 1예

원경준,이준,변유미,조민근,한경택,김원,홍란,임성철,김경종,김영대,박찬국,김만우 朝鮮大學校 附設 醫學硏究所 2007 The Medical Journal of Chosun University Vol.32 No.2

Gastrointestinal stromal tumor (GIST) is the most common non-epithelial neoplasm arising in the gastrointestinal tract, but this tumor is rarely seen in association with type l neurofibromatosis (NFl) Generally, the majority of GISTs are isolated neoplasm and they are sporadically found in the stomach, but the GISTs in NFl patients are usually multiple and usually found in the small intestine. We report a case of multiple GISTs in the jejunum of a 63-year-old woman diagnosed as NFl accompanied by complication of gastrointestinal bleeding, In this case, Patient had multiple cafe-au lait spots and neurofibroma on skin and had freckling on axilla and groin, and then, we made a diagnosis of NFl. Gastrointestinal bleeding is controlled by resection of multiple GISTs. Generally, only 3-5% of all gastrointestinal bleeding comes from the small bowel. Causes of small intestinal bleeding are angiodysplasia, neoplasm, NSAIDs induced ulcer etc. but, If patients have NFl accompanied by complication of gastrointestinal bleeding, GISTs on small bowel must be considered.

ATM망에서 비실시간 서비스를 위한 효율적 셀 제어 기법

김변곤,김남희,정동수,정경택,이종인 국립7개대학공동논문집간행위원회 2005 공업기술연구 Vol.5 No.-

The Guaranteed Frame Rate(GFR) service has been designed to accomodate non-real-time applications, such as TCP/IP based traffic in ATM networks. The GFR service not only guarantees a minimum throughput at the frame level, but also supports a fair share of available resources. In this paper, we propose a cell control algorithm which can improve the fairness and the throughput through the traffic control in GFR service. For the evaluation of a proposed scheme, we compare the proposed scheme with the existing scheme in the fairness and the throughput. Simulation results that the proposed scheme can improve the fairness and throughput than the existing scheme.

Counseling의 基本的 槪念 및 三學派에 관한 理論과 技術問題 比較考察

金慶澤 대구교육대학교 1971 論文集 Vol.7 No.-

Counseling is a central and momentous part of guidance. For, its purpose is to accelerate the client's growth of personality by professional and technical activities to help the adjustment of the client. In this thesis, I defined some major concepts of counseling-adjustment, needs, human relations, conflicts, self-expression, and self-concept-from my point of view. At the same time, I made clear some differences among the three theories of counseling-clinical, client-centred, and eclectic counseling. I discussed and compared the emphases and problems the three schools hold respectively. As a conclusion, I suggested what kind of theories and techniques would be the most desirable in our school setting.

어린이의 問題行動 治療를 위한 遊戱療法의 適用上 問題考察

金慶澤 대구교육대학교 1973 論文集 Vol.9 No.-

Children learn a number of things through plays because children express their natural feelings and thinkings by means of behaviors rather than their linguistic expressions. Some needs, attitude and feelings are shown by their plays. Then acceptive and receptive atmosphere are established. So the more they play the more rakedly they reveal their feelings. Through precise observation of their behaviors, we can understand the traits of their personality and gain several informations for diegnosing behaviors. Besides, if the children get some frustration on account of their limited circumstances, they are fallen into emotional stress. And according to the accumulation of this stress the maladjustment on the personal and behaviorial activities is often shown. In order to remove these maladjustments and maintain normal mental health by plays, this study will be concentrated on the catharsis of melancholy feelings and on the expression of their depressed feelings. In this article, the follwoings are investigated for applying for school education in an attempt to solve these problems. 1) The subject children on play therapy. 2) The theoretical point on play therapy. 3) The technical problem on play therapy. 4) The facilities and establishments on play theory.

情緖障害兒의 理解와 治療的指導 問題

金慶澤 대구교육대학교 1976 論文集 Vol.12 No.-

In this study the emotional disturbance, from the formative viewpoint, is not the secondary one which is formed by the intelletual or physical handicap , but chiefly the one caused by the following factors which appear through life process or human relation: the loss of self-confidence, inferiority complex, conflict, defeat feeling, guilt-feeling, hatred, frustration, over-sensitivenss,jcalousy, fear and anxiety. That is, this study deals with the emotional problems by internality formed primarily as psychological cause. W, Healy, an American psychiatrist, compared the children who had ever expenced delinquency with those who had not, in the course of emotional development during infant age and chilhood. According to the result of this comparison, ninety % of the former had had a serious traumatic experience, but only thirteen % of the latter had experienced that, in the course of emotional development during infant age and childhood. This says that the emotional disturbance has a great influence on the cause of delinquency. The emotional disturbance of the children are basically caused by the following things:strain, fear, anxiety, frustration, psychological impulse from life environment during infant age or childhood, conflict and agony of life situation, and dissonance of companion ship, and so on. Furthermore, this is deelply accumulated, and so this proceeds to the problem of character and behavior in the end. And at last this proceeds to the unsocial or antisocial behavior as a problem behavior. So this study deals with the following problem contents in order to promote a sound personality by the early elinination, decrease, and discovery of the emotional disturbance. 1)Several understanding problems of the emotional disturbance 2) Genetical Factors of the emotional disturbance 3) Problems on the classification of the emotional disturbance 4) Survey problem on the childeren with emotional disturbance 5) Diagnostic problems of the emotional disturbance 6) The problem of guidance with the treatment of the emotionally disturbed Children.

學習 不適應兒의 診斷과 心理學的 考察

金慶澤 대구교육대학교 1968 論文集 Vol.4 No.-

Instruction of teachers aim at expediting and improving the learning of the maladjusted children to attain a high level of intelligence, sociability, physical conditions, character and emotion. Directing them is the duty of the teachers and has been a subcurrent problem in the guidance of their study and living. In light of the cause analysis, devided largely into two parts, for the maladjusted children, a study was made both on the subjective conditions (or character consititution) such as intellect, physique, character, emotion, basic scholarship and psychological habit of lesson and on the effect of the dynamic human relation and psychological factors in the objective conditions (or environment constitution) such as family, class and school, society on the growth of the children. According1y, attention should be invited to diagnose the causes and find ways of instruction. So the important matters and instruction methods for the maladjusted children in lesson were concretely studied.

교정학적 적용을 위한 초내식성 스테인리스강의 특성

오근택,김금진,황충주,박용수,김경남 大韓齒科器材學會 2001 대한치과재료학회지 Vol.28 No.3

Various kinds of orthodontic appliances have been developed for ideal tooth movement during orthodontic treatment. The orthodontic appliances made of metals are bands, arch wires, brackets and miniscrews as orthodontic anchorage. Generally, these appliances are made of stainless steel, pure titanium, Ni-Ti and TMA with the proper biocompatibility. However, localized corrosion of these materials can frequently occur in the particular environment. Super stainless steels, recently developed, have good corrosion resistance to reduce metal ion release induced by many kinds of corrosion. Recently, it has been reported that nickel ion release from orthodontic appliances affect the prevalence of nickel sensitization; however, there has been some controversy about nickel hypersensitivity to orthodontic appliances containing nickel. The purpose of this study was to evaluate and compare the microhardness, nickel ion release, corrosion resistance and cytotoxicity of 4 types of super stainless steels and 316L stainless steel as the control group according to nickel contents, and to determine the acceptability as the new material for various kinds of orthodontic appliances. All super stainless steels showed higher microhardness than 316L stainless steel, SR-3Mo showed especially the highest microhardness. In anodic polarization test, corrosion resistance was high in order of SR-50A, SFSS, SR-6DX, 316L stainless steel, SR-3Mo. There was no increase in nickel ion release from SR-50A, SR-6DX, 316L stainless steel with immersion time in artificial saliva; whereas there was some increase from SFSS and SR-3Mo with immersion time. All super stainless steels showed very low cytotoxicity regardless of nickel contents although SR-3Mo showed relatively higher cytotoxicity than the others. It is concluded that SR-50A among super stainless steels has the highest corrosion resistance and biocompatibility. It is undesirable to consider the alloys with high nickel content to release lots of nickel ion.

폐흡충에 의한 무균성 노흉에 대한 돼지꼬리형 도관(pig-tail catheter)을 이용한 치료의 효과

한경택,권세훈,김형호,하재화,선길홍,권용은,윤성호,이승일 朝鮮大學校 附設 醫學硏究所 2006 The Medical Journal of Chosun University Vol.31 No.3

Background: Pulmonary paragonimiasis is caused by consumption of raw or improperlycooked crustacea infected with the laval stage (metacercaria) of Paragonimus westermani. The most characteristic symptoms were rust-colored sputum and cough. Paragonimiasis causes pleural thickening or effusion in 48% of the patients. Pleuro-pulmonary paragonimiasis can be easily overlooked by physicians who do not suspect this disease in the differential diagnosis. Method: We compared the outcomes of 11 patients with paragonimus empyema managed either through thoracotomy or pig-tail catheter drain. These patients were confirmed by food history, clinical and radiological findings, and laboratory data. Results: The male and female ratio was 1.75 : 1, and mean age was 40.0 ± 13.5 years. AII patients had pulmonary symptoms such as cough or chest pain. Serum-ELISA for paragonimiasis were all positive (mean titer was 0.57). AII patients had pleural effusion in radiological findings( 2 patients had bilateral pleural effusion). All patients received praziquantel (75 ㎎/㎏/day for 3days). Two patients were treated with thoracotomy and nine patients were treated with pig-tail drain. Hospital stay were 14.5 days in thoracotomy group and 5.6 days in pig-tail group respectively, Conclusion: Compared to the conventional thoracotomy grouP, the patients with paragonimus empyema who received pig-tail catheters had a significantly-decreased period of drain in situ, were clinically improved earlier, and were discharged earlier.

골내 고정 장치용 초내식성 오스테나이트 및 듀플렉스 스테인리스강 가공재의 특성

오근택,강국진,박용수,김경남 大韓齒科器材學會 2003 대한치과재료학회지 Vol.30 No.3

Nickel is one of the most common causes of allergic contact dermatitis and hypersensitivity. In case of stainless steel as biomaterials, the higher the corrosion resistance and the lower the nickel content, the better it is or the human body. However, because nickel plays an essential role in the stabilization of the austenitic phase and the corrosion resistance of stainless steel, it is difficult to remove the nickel from the constituents of stainless steels completely. Therefore, the purpose of this study was to investigate corrosion resistance, cytotoxicity, and mechanical property of super stainless steels, which had high corrosion resistance by synergistic effect of Mo(or W) and N, with respect to nickel content and to evaluate their potential for orthodontic applications. Super austenitic stainless steel(SR-50A) had high nickel content of 22% and super duplex stainless steels nickel contents of 6~10%. Super austenitic and duplex stainless steels had nitrogen contents of above 0.2%. Also, these steels had high Mo or W contents which were able to increase the localized corrosion resistance. In terms of hardness, super stainless steels, which had Vickers hardness values of 374~400 Hv in cold-rolled state and 186~285 Hv in annealed state, exhibited higher values than 316L S. S.. Duplex stainless steels exhibited higher mechanical properties than austenitic stainless steels. In terms of corrosion resistance, super stainless steels exhibited lower passive current density(2.3~3.8 ㎂/cm^2) than pure Ti(6.6㎂/cm^2) in the body-simulated solution and similar potentiodynamic polarization behaviors. Pitting corrosion occurred in 316L S. S. but not in the others. Thus these steels were considered to have high corrosion resistance in the human body. In terms of cytotoxicity, SR-5OA and SAF2507 exhibited none cytotoxicity and the others slight. This results indicated that the cytotoxicity of alloys containing nickel had no relation with nickel content because SR-5OA with the highest nickel content exhibited none cytetoxicity In conclusion, it is considered that super stainless steels with high corrosion resistance and good biocompatibility can be used for orthodontic applications because of the enhanced passive film by high addition of Mo, W, N, etc.

알루미늄 튜브 하이드로포밍에서의 예비 굽힘 공정의 효과에 관한 연구

임희택,박경창,김형종,김헌영 江原大學校 産業技術硏究所 2004 産業技術硏究 Vol.24 No.B

Recently social demands of fuel economy and environmental regulations require the development of lightweight components and new manufacturing technologies. The aluminum tube hydroforming is a manufacturing process which can provide lightweight components as automotive parts. In this paper, the hydroformability of aluminium tube in different condition of bending process is presented. An investigation has been conducted on how to control the deformed shape and its effect on thinning distribution after hydroforming by using finite element simulation. Finite element simulation of tube hydroforming for automotive trailing arm is carried out to explore the effect of 2-dimensional and 3-dimensional bending.