염소를 포함한 액체에서의 금박막 패터닝과 표면 분석

성덕경,최정옥,안일신,김옥경 한양대학교 이학기술연구소 2004 이학기술연구지 Vol.7 No.

금박막은 높은 전도성의 화학적인 안정성을 가지고 있으므로 GaAs를 기판으로 한 bevice에서 널리 쓰이고 있으며 SAM(Self-Assembled Monolayer), Nanolithography 등에서도 아주 주요하게 사용되고 있다. 본 연구에서는 염소가 포함된 액체에 금박막이 접해있고 UV를 조사하여 식각이 되는 것을 발견하고 연구하였다. 노광량을 조절하여 금박막의 기각률을 조절할수 있으며, 또한 가모강제 공정을 거치지 않고 금박막에 직접 조사하게 되므로 간단하게 패터닝을 할수 있다. AFM(atomic force microscope), optical microscope, ellipsometry 를 이용하여 식각률 측정 및 표면 변화를 보았다. Various metals or their alloys are used in the semiconductor metallization process or in micro-or nano-structure devices. We report a novel etching technique of gold film based on new phenomenon that gold is soluble in chlorine containing solutions or solvents under UV irradiation. Mask patterns can be transferred to gold surface directly without resorting to complicate photoresist process. And, etch rate could be controlled from sub nanometer to few tens of nanometers per minute by adjusting exposure parameters. Moreover, non-toxic liquid such as NaCl solution can be used for the process. AFM(atomic force microscope), optical microscope, ellipsometry were used to characterize the etch rate and the surface morphology.

표피 성장인자의 국소적용이 인체 표피화에 미치는 효과에 대한 연구

김현옥,유성종,정승문,김성수 大韓成形外科學會 1993 Archives of Plastic Surgery Vol.20 No.3

An understanding of the mechanism of healing has increased dramatically during the past decade. The phenomenon of epithelization is important in the normal resurfacing of a donor site or a partial thickness burn wound. This study was conducted to clarify the effect of epidermal growth factor in wound healing of human. Paired donor sites were created in 18 patients who required skin grafting for either burns or reconstructive surgery. One donor site from each patient was treated topically with silver sulfadiazine cream, and the other was treated with silver sulfadiazine cream containing epidermal growth factor(10ug/ml) (Human recombinant epidermal growth factor ; Sigma, St.Louis, Mo). The donor sites were photographed daily, and healing was measured with the use of planimetric anlysis. The donor sites treated with silver sulfadiazine containing epidermal growth factor had an accelerated rate in all 18 patients as compared with that in the paired donor sited treated with silver sulfadiazine alone. Combining data from all patients demonstrated reduced the average time to 100% healing by approximately 2 to 3 days (p<0.01). Light and electron microscopical study of biopsy specimens taken from the centers of donor sites three days after the onset of healing supported these results. In conclusion, epidermal growth factor accelerates the rate of healing of partial thickness skin wound.

運動學習에 있어서 言語的 强化의 效果에 關한 實驗硏究

金成玉 全北大學校 敎育大學院 1984 敎育論叢 Vol.4 No.-

Problem Reinforcement is essential to learning to stimulate learning activities. Praise and reproof, encouragement and discouragement, reward and punishment and ego-involvement (self-respect, status, prestige) are devices used to stimulate learning activities. Of all these, praise and reproof is one of the best way to stimulate learning activities in class situation. Many previous studies (Hurlook 1925, Anderson 1966) suggested that praise was more effective than reproof on learning. But, those studies were on the cognitive learning or performance and skill, any studies on motor learning have not been attempted. Therefore, this present study was an attempt to clearify the effects of the praise and reproof on motor learning and has three specific problems to be answered. Specific problems were as follows; 1. In general,praise is more effective than reproof on motor learning. 2. Reproof is more effective than praise for the group of the good scholastic achievement and high IQ, and less effective for the group of the bad and the low. 3. Reproof is also more effetctive than praise for the group of the good motor ability and less effective for the bad. Method A. Subjects 1. For the problem 1, subjects were 195 male students of the three classes chosen randomly from the whole 1st year classes in K Middle School 2. For the problem 2, subjects were 15 students of superior group and 15 students of inferior group in each of above three classes. They were chosen in terms of the IQ and the scholastic achievement. 3. For the problem 3, subjects were 15 students of each group chosen by the same manner as the“problem 2”in terms of the motor ability. B. Procedure The subjects had practiced the long jump as follows: 1st step; subjects had practiced lead-up skills; run, take off, action in the air and landing by part method of learning for six hours. 2nd step; subjects had practiced lead-up skills placing a bar (55㎝ high) as a barrier to aid lifting the leg high into the jump by the whole method of learning for nine hours. 3rd step; subjects had practiced the long jump with all his power, speed and skills for three hours by whole method of learning. During the practicing period, the teacher gave only praise to the praise group for the comparatively good performed motor behavior, but disregard the bad, and gave only reproof to the reproof group for the comparatively badly performed motor behavior, but disregard the good. And the control group were not received any reinforcement for any motor behavior. To compare the improvement among the three groups, the measurement was done by three times during the practice. Results 1. Praise was not more effective than reproof on motor learning in general, the problem I was rejected. 2. Reproof was more effective than praise for the group of the good scholastic achievement and high IQ, and less effective for the bad and the low group, but after long period of practicing the improvement of the two group was alike. Therefore, the problem 2 was confirmed in general. 3. Problem 3 was confirmed in general by the same manner as 2. But, there was no significant difference in the improvement of all the scores in the results of F test, so the results of this study could not be generalized. Nevertheless, on the basis of this results the following suggestions could be made. 1. When we attempt to apply general learning theories to motor learning we have to study those learning theories strictly before application to motor learning. 2. Reproof can be an effective reinforcement in motor learning if used properly. 3. The study have to be performed on the effects of praise and reproof according to the subject's sex, personality, cultural and social environment and manner in which praise and reproof is given.

胴體回轉에 따른 上肢運動의 變化에 關한 硏究

權永玉,洪盛杓 忠南大學校體育科學硏究所 1987 體育科學硏究誌 Vol.5 No.1

To study the good movement state of the trunk twisting and the segment of the upper limbs to get the correct logn throwing distance, the author got the kinematic changing elements of the upper limbs movement by the screen analysis of the displacement, and the movement velocity of joints, angles of joints, spending hours, and the wheel tracks, selecting the skilled and the unskilled. 1. In the throwing at his position, when the trunk twisting was great, the shifting distance of the joints was longer, and had the natural track in which ending was gentle. 2. The vertical movement of the body had a deep relation with the trunk twisting in the throwing movement. 3. When the trunk twisting was very slow, the direction of the joint track was direct opposite to the quick twisting. 4. The time each track got out of the body and the shifting distance of the slowest joint velocity by the trunk twisting of the skilled, vertical shift, and the enlargement of the angle of joints coincided. 5. The spending hours of the throwing movement became longer as the trunk twisting was big, and the slowest joint velocity which preparing time is ended in the throwing movement was in the position around 60% of the total spending hours. 6. In the skilled person the appearing of the slowest velocity of each joints coincided among joints, and brought the late half velocity rising at the slower velocity (skilled : 5m/sec, unskilled : 9m/sec) comparing the unskilled person. 7. The time of the late half velocity rising and shifting distance had a deep relation with the velocity of a ball when it was released.

청각장애학교에서의 진로교육 현황 및 개선방안

원성옥,강윤주 대구대학교 특수교육재활과학연구소 2005 특수교육재활과학연구 Vol.44 No.4

The purpose of this study is to examine and analysis the realities of career education and to propose the its improvements in school for the deaf. We gathered opinions of 135 teachers in school for the deaf from questionnaire.The results are shown as following. First, Teachers have a correct understanding about the concept, the instruction steps, and instruction contents of career education. Second,Teachers know the necessity and importance of career education in classroom,but they didn't give the career guidance and information in classroom. Third, Teachers didn't give the career guidance and information in extra activity and counseling. Fourth,The materials and programs are not enough to provide the career education. Finally, We suggest improvements of career education based on the realities and teachers' recommendation 본 연구는 청각장애학교의 진로교육 현황을 분석하기 위해 전국에 소재하고 있는 11개 청각장애학교에 근무하고 있는 교사 135명을 대상으로 진로교육에 대한 인식과 진로교육 현황을 교과지도, 특별활동 및 진로행사, 상담활동, 진로정보자료 및 프로그램의 활용으로 나누어 조사하였다. 조사결과, 진로교육은 초등부부터 시작되어야 하며 그 필요성도 느끼고 있었을 뿐 아니라 진로교육의 의미나 학교급별 진로교육의 단계와 그에 적절한 교육 내용에 대해서도 바르게 인식하고 있었다. 그러나 교과활동을 통한 진로교육의 제공, 특별활동과 상담활동을 통한 진로교육 현황은 필요성 인식에 미치지 못하고 있는 실정이다. 이러한 현황과 교사들이 제안하는 개선방안을 바탕으로 진로교육 개선방안을 제시하였다.

중소제조기업 경영상의 문제점 및 해결방안에 관한 실증적 연구

박성규,전춘옥 가톨릭대학교 사회과학연구소 1999 社會科學硏究 Vol.15 No.-

중소제조기업의 경영혁신운동에 관한 비교연구

전춘옥, 박성규 가톨릭대학교 산업경영연구소 2001 産業經營硏究 Vol.- No.9

싱글 튜브 시스템 BTA 工具를 使用한 SM55C 鋼의 深孔 加工 特性에 관한 硏究

全泰玉,全彦燦,沈成輔,張性圭 동아대학교 공과대학 부설 한국자원개발연구소 1994 硏究報告 Vol.18 No.2

The BTA deep hole machining has an increasing demand because of its wide applications and its good productivity. The main feature of the BTA drill is that the tool cutting edges are unsymmetrically located on the boring head. This provides a stabilizing cutting force resultant necessary for self guidance of the boring head. The BTA drills are capable of machining for having large length to diameter ratio in single pass. The study of the accuracy and surface finish of holes produced would reveal quite useful information regarding the process. This thesis deals with the experimental results obtained during single tube system BTA machining on SM55C steel for different machining conditions.

상호운용성 지원을 위한 이동 에이전트 시스템 설계

정성옥,이정기,홍성표,송기범,이준 조선대학교 전자정보통신연구소 2002 電子情報通信硏究所論文誌 Vol.5 No.1

A mobile agent is a computer program that acts autonomously on behalf of a person or organization and that has the unique ability to transport itself from one system in a network to another. An agent system is a platform that can create, interpret, execute, transfer and terminate agents. But, most current mobile agent systems adopted their own architectures, being implemented in various ways. Since those agent systems provide different interfaces, agens created in one mobile agent system could not move to other agent systems perform their task. To solve this problem, interoperability becomes one of the important issues on mobile agent systems. The OMG(Object management Group) proposed: the MAF(Mobile Agent Facility) specification for the interoperability among heterogeneous mobile agent systems. The MAF specification contains MAFAgentSystem and MAFFinder interfaces, and defines agent management, code mobility and naming rule. In this paper, we propose an execution model that can execute mobile agents within an agent system and migrate them to a remote agent system as conforming MAF, and design the structure and functions of its agent system. Our model uses Java and CORBA ORB in its the implementation and exploits their characteristics appropriately. Specifically its agents beside its clients can spawn child agents and control other agents.

정전위 SSRT법에 의한 해양구조물용 Cu함유 고장력저합금강의 수소취성한계전위 규명에 관한 연구

김성종,박태원,심인옥,김종호,김영식,문경만 한국해양대학교 해양과학기술연구소 2001 硏究論文集 Vol.10 No.1

A marine structural material was well known to have high tensile strength, good weldability and proper corrosion resistance . Cu-containing high strength low alloy (HSLA) steel was recently developed for their purposes mentioned above, And the steel is free about preheating for welding, therefore it is reported that shipbuilding cost by using it can be saved more or less. However the marine structural materials like Cu-containing HSLA steel are being generally adopted with cathodic protection method in severe corrosive environment like natural sea water but the high strength steel may give rise to Hydrogen Embrittlement due to over protection at high cathodic current density for cathodic protection. In this study, Cu-containing HSLA steel using well for marine atructure was investigated about the susceptibility of Hydrogen Embrittlement as functions of tensile strength, strain ratio, fracture time, and fracture mode, etc. and an optimum cathodic protection potential by slow strain rate test(SSRT) method as well as corrosion properties in natural sea water. And its corrosion resistance was superior to SS400 steel , but Hydrogen Embrittlement susceptibility of Cu-containing HSLA steel was hider than that of SS400 steel. However Hydrogen Embrittlement of its steel by SSRT method was showed with pheonomena such as decreasing of fracture time. strain ratio and fracture mode of QC (quasi-cleavage) Eventually it is suggested that an optimum cathodic protection potential not presenting Hydrogen Embrittlement of Cu-containing of HSLA steel by SSRT method was from-770mV(SCE) to - 900mV(SCE) under natural sea water. (Received September 21, 2000)