Pendant Crown Ethers 운반체를 이용한 에멀젼 액체막계에서의 Pb^2+ 분리

이종광,이부영,김종향,조문환 慶尙大學校 기초과학연구소 1992 基礎科學硏究所報 Vol.8 No.-

Acryloyl methyl benzo-18-crown-6 단위체는 '4-hydroxymethyl benzo-18-crown-6와 acryloyl chloride을 반응시켜 합성하였다. Poly(acryloyl methyl benzo-18-crown-6)는 벤젠용매하에서 AIBN을 개시제로하여 제조하였다. [0.001mole/L M(NO_3)_n(M^2+ =Na^+, Mg^2+, Ca^2+, Sr^2+, Ba^2+, Zn^2+, Cu^2+, Cd^2+, Mn^n+ 와 Pb^2+)]를 포함한 source phase와 거대고리 리간드 [acryloyl methyl benzo-18-crown-6와 poly(acryloyl methyl benzo-18-crown-6)]와 계면활성제 Span 80을 포함한 toluene 막 그리고 Li_4P_2O_7를 포함하는 receiving phase로 구성되어진 에멀젼 액체막계에서 source phase로 부터 금속이온들의 소멸속도를 연구하였다. 금속이온의 이동에 관한 실험에서, 각 혼합물로 부터 Pb^2+ 이온이 가장 높은 이동율을 나타내었다. Acryloyl methyl benzo-18-crown-6 was synthesized by reacting 4'-hydroxymethyl benzo-18-crown-6 with acryloyl chloride. Poly(acryolyl methyl benzo-18-crown-6) was prepared in benzene by using AIBN as an initiator. The disapperance of metal ions from source phase as a function of time was studied in emulsion liquid membrane systems comprised in an aqueous source phase [0.001mole/L M(NO_3)_n(M^n+ =Na^+, Mg^2+, Ca^2+, Sr^2+, Ba^2+, Zn^2+, Cu^2+, Cd^2+, Mn^2+ 와 Pb^2+)], a toluene membrane containing of the macrocyclic ligand[acryloyl methyl benzo-18-crown-6 and poly(acryloyl methyl benzo-18-crown-6)] and the surfactant Span 80, and an aqueous Li_4P_2O_7 receiving phase. In the experiment for metal ions transport using this emulsioning liquid membrane, the Pb^2+ ion transport was more higher than other metal ions.

자기동조 PID제어기에 의한 전력계통 안정화에 관한 연구

정형환,김상효,이광우 東亞大學校 大學院 1994 大學院論文集 Vol.19 No.-

A new technique for the exitation control of synchronous generator is presented in this paper. The proposed technique employs a self-tuning proportional-integral-derivative(PID) power system stabilizer in order to improve the dynamic performance of a synchronous machine. The self-tuning-regulator(STR) PID using recursive-least-squares(RLS) estimated K? K?, K? Gains. A application voltage control of power system terminal voltage deviation, angular velocity deviation, and rotor angle deviation considered dynamic. Simulation results establishment that proposed STR PID control technique superiorited conventional PSS(power system stabilizer) control.

마이크로 엔드밀링 공정의 절삭계수 모델링 및 최적 공정 설계

이광조,정성종 한국공작기계학회 2008 한국공작기계학회 추계학술대회논문집 Vol.2008 No.-

Micro end-milling process is applied to fabricate precision mechanical parts cost-effectively. It is a complex and time-consuming job to select optimal cutting conditions with high productivity and quality. To consider the productivity and quality of precision mechanical parts, micro end-mill wear and cutting force characteristics should be studied exactly. In this paper, high speed machining experiments are studied for optimum process design and modeling of cutting parameters in micro ball end-milling processes. Cutting force and wear characteristics under various cutting conditions are investigated through the condition monitoring system and Taguchi method. Mathematical models for the cutting forces are derived from the response surface method. Optimal milling database has been constructed through experimental models.

퍼망간네이트-옥살산에 의한 아크릴아마이드 수용성중합에서의 첨가제 효과

이채주,이종광 慶尙大學校 1986 論文集 Vol.25 No.2

The polymerization of Acrylamide initiated by MnO4-H2C2O4 redox pair has been studied in aqueous media at 35±0.2℃ in nitrogen armosphere. The rate of polymerization is independent of activator concentration (2×10-3 to 4.5×10-3 mole/1) expect at very high (above 6.3×10-3 mole/1) concentration. The initial rate of polymerization has been found to be proportional to nearly 1.17 power of low catalyst concentration (2.3×10-4 to 6.25×10-4 mole/1) and nearly the first power of low monomer concentration (1.47×10-3 to 3.3×10-3 mole/1). The overall energy of activation has been found to be 10.99kcal/mole within the temperature range 30-50℃. The effects of various additives have been studied. Organic solvents and salts depress the initial rate but small amounts of manganous salts(MnSO4, MnCl2) increase the initial rate to a considerable extent. A complexing agent(NaF) and anionic and cationic surfactants show marked influence on the rate of polymerization. The intrinsic viscosity in aqueous acrylamide solution at 30±0.1℃ was 1.01 and the molecular weight of the polyacrylamide was 63,900.

가족성 팔목터널 증후군 1가족례

이명종,김광국,이상암,마효일,윤준오 울산대학교 의과대학 1993 울산의대학술지 Vol.2 No.1

This is a report of familial carpal tunnel syndrome(CTS) occuring in four members of two generations of a Korean family. One of those with CTS had surgical release and its pathologic finding was nonspecific fibrotic change. The age of those affected by CTS ranged form 35 to 76 years of age. Family pedigree suggests an autosomal dominant gene. This is belived to be the first case report of familial carpal tunnel syndrome in Korea.

퍼망간네이트-옥살산 Redox System에 의한 메타크릴산의 수용성 중합

이종광 慶尙大學校 기초과학연구소 1986 基礎科學硏究所報 Vol.2 No.-

The polymerization of methacrylic acid initiated by permanganate-oxalic acid redox system has been studied in aqueous media at 30±0.2℃ in nitrogen atmosphere. The initial rate of polymerization has been found to be proportional to nearly the first power of low catalyst concentration and 0.24 power of high concontration. The initial rate increases to the increase of monomer concentration, but decreases with the increase of activator concentration. The overall energy of activation has been found to be about 8.7 ㎉/mol within the temperature range 25-45℃. Organic solvents and salts decrease the rate of polymerization but MnSO_4 increases the initial rate. The intrinsic viscosity measured in 0.002 N hydrochloric acid at 30±0.1℃ was 1.41 and weight-average molecular weight was 105,000.

사회인구학적 특성에 따른 중학생들의 여가활동실태와 욕구성향에 관한 연구

이광근,강종구,이일재 한국스포츠리서치 2003 한국 스포츠 리서치 Vol.14 No.4

The objectives of this paper is 1) to find the problems in the attitude and current state toward recreation and present some resolutions to them, and 2) to prevent the wrongdoing and rear the healthy emotion among the middle school students. The subjects of this study consisted of 600 middle school students in J-city and K- province. However, 29 subjects were ruled out in the process of the analysis because they answered the questionnaire insincerely or their answers were considered lacking in reliability. As a result, only 571 subjects were used for the analysis. In order to analyze the collected data proper to the objectives of this study, the statistical technique used for the analysis of the study were t-test by T-TEST procedure in the SAS Package and FREQ procedure fot the ratio. Results obtained through the above method and procedure of this study were as follows: First, the differences in the state of recreation activity between city area students and countryside area ones. 1) Countryside students have more average recreation time in week days, but they have less average recreation time on weekends. 2) The countryside parents are less interest in recreation time activity. 3) City students are more satisfied with sports facilities. 4) City students have more allowance and spend more money for the recreation. Watching TV is the most favorite recreation activity and city students spend more time in watching TV. Second, the differences in the tendency of desire between city area students and countryside area ones. 1) City students answer that they need more recreation activity. Third, the differences in the state of recreation activity between boy-students and girl-students. 1) Boy-students have more average recreation time. Girl-students are less satisfied with recreation time. 2) Girl-students are less satisfied with sports facility and recreation facility. On the whole, boy-students make use of playground of a school as sports place, but girl-students, their homes. 3) Watching TV is the most favorite recreation activity and girl students spend more time in watching TV. Fourth, the differences in the tendency of desire between boy-students and girl-students. 1) For the boy-students, the most favorite sports activity is soccer, and basketball and baseball follows For the girl-students, the most favorite sports activity is badminton, and dancing and swimming follow. 2) For the boy-students, the most needing recreation facility is one for physical education, and a theater for the teen agers and lounge follows. For the girl-students, the most needing recreation facility is a theater for the teen agers, and facility for public entertainment and disco theque follow. In addition, common opinions among all categories of the study are as follow. 1) They all think recreation activity help them to improve themselves. On the whole, friends and mass media affect them in the recreation activity. 2) They answer that recreation activity is necessary to their daily life, and friends and themselves are considered rightest partners in the recreation activity. 3) Recreation activity is discouraged by the excuses such as 'it causes the low academic record 'I have no time'.

학교체육 활성화 방안에 대한 연구(Ⅰ) : 강원대학교 교양체육 운영방법의 개선을 중심으로

이광재,문병용,노성규,박기동,홍관이,한상준,유옥재,엄기진,정청자,오수일,김윤래,박장평,부기원 江原大學校附設 體育科學硏究所 1986 江原大學校附設體育科學硏究所論文集 Vol.- No.11

Try to find a scheme for activation to College Physical Education, this Report informs the various kinds of Survey and process those were projected for improvement of management methods on Cultural Physical Education in Kang Weon National University. From experimentally carried out "Sports events Choosing System" not as usual be inforced "Total practical Skill System", Following Positive effects and sujestions were Presented; 1. "Sports events choosing system" gave birth to more students' interesting and more voluntary participation to the sports events they chose, and sports skill and instruction level was elevated due to charge of expert according to each sports events. This system would be managed continuously hereafter for it related to life sports. 2. This System needs to closed cooperations between College and Community, for the facilities of community are utilized by college. 3. To complete the plan for activation of college Physical Education, additionally, the successional study ; namely "autonomous extracurricular sports activity" should be excuted hereafter.

Sezary증후군과 병발된 용혈성 빈혈 1예

유광하,진춘조,김홍승,이종인,심영학,정순희,이창훈 건국대학교 의과학연구소 1997 건국의과학학술지 Vol.- No.7

실시간 소프트웨어 개발을 위한 연관중심 객체 설계 방법

이광용,강양희,정기원 崇實大學校 生産技術硏究所 1995 論文集 Vol.25 No.2

Many approaches have been developed for handling the design of complex real-time systems, particularly data-flow oriented approaches [2-4] and some object-oriented approaches [5-9]. But, in he data-flow oriented model of real-time systems, primary building blocks represent the functional aspects of a system. Thus the mapping from software modules to real world entities is often not apparent from the code's structure. Much of the information about the structure or the system's detail is distributed globally throughout the system's architecture. This can make it difficult to understand, maintain, and reuse such code. In contrast to the data-flow oriented model, the primary building block of the object-oriented model directly represent the structural aspects of a system. The system's functional aspects are represented by interobject communication and interobject computation. So, the software developed by the object-oriented concepts appears to be better in system comprehension, more natural in design, and easier in maintenance than the data-flow oriented approaches. Many think it will eventually take over the data-flow oriented approach. However, current object-oriented approaches are not powerful enough to deal with the real-time problems such as the thing correctness concurrency and adaptation. This paper presents a method of modeling and designing the concurrency, adaptation, and real-time execution of objects using an association-oriented technique in developing a real-time software. This method emphasizes on its ability to represent the dynamic behavior of a real-time software system and to reduce the object-orientation complexity using system decompositions.