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[논문]Operational Characteristics of CO2 Laser Adopted by Superposing-Discharge
Hee-Je Kim,Hyun-Ju Chung,Byoung-Dae Min,Jong-Han Joung,Sung- lun Park 釜山大學校生産技術硏究所 2003 生産技術硏究所論文集 Vol.62 No.-
오늘날 현저한 CO2 레이저의 응용 추세에 발맞추어 보다 다양한 형태의 출력 제어 기술이 대두되고 있다. 본연구에서는multi-Pulse Superposing-Discharge 기술을 이용하여 다양한형태의 CO2 레이저의 펄스를 성형 하였다. 펄스 성형을 위한 방법으로 PIC one-chip microprocessor를 이용하여 삼중 PFN 모률의 SCR을 각각 고유의 지연시간을 가지도록 제어하였다. 실험에 사용된 삼중 PFN 모률의 전원 회로는 각각 캐패시터 인덕터,SCR,고압 펄스 트랜스 그리고 고압 트랜스 2차측에 브릿지 정류기로 구성 하였다. 고압 펼스 트랜스의 1차측을 제어하므로서 PFN 모률의 동작을 저 전압에서 수행 할 수 있다. 트랜스의 2차측에 연결된 전파 정류기는 펄스 에너지를 부하에 지속적으로 전달한다. 본 연구에서는 삼중 PFN 모률의 각각의 SCR을 다른 시간 가격을 두고 트리거 하므로서 다양한 Long pulse shaping을 실현하였다. 또한 약 250-1000μs 의 주기를 가지는 다양한 펄스형 레이저 빔을 얻었다.
이상호,김형태,박정현 大韓小兒齒科學會 1992 大韓小兒齒科學會誌 Vol.19 No.2
Normal color of the gingiva and other oral tissues is uniformly coral pink or a variation of pink and is produced by the vascular supply, the thickness, degree of keratinization of the epithelium and the presence of pigmented containing cells. Gingival pigmentation occurs as a diffuse, deep purplish and discoloration or as irregularly shaped brown and light brown patches. The most frequent cause of gingival pigmentation is melanin deposits. It may be appear in the gingiva as 3 hours after birth and is present in all normal individuals. Melanin oral pigmentation can be normal physioligic pigmentation as well as pathologic pigmentation. Disease that increase melanin pigmentation include the Addison's disease, Pertz-Jegher's syndrome, Albright's syndrome, Von-Recklinghausen's disease. Gingival pigmentation is eliminated by the mucogingival flap, gingivectomy, gingival graft, electrosurgery, laser surgery, deepithelialization. The treatment were done by deepithelialization with periodontal knife, scalpel, diamond stone. The technique is relatively simple and the less postsurgical discomfort, requires minimum time and effort. We observed almost normal gingival color and shape after postsurgical. Further, periodic recall check is needed for evaluation of repigmentation.
SBR 자동제어 시스템을 통한 하수의 질소 제거에 관한 연구
주현종,김성철 京機大學校 2006 論文集 Vol.50 No.-
The object of this study was develop an automation control for nitrogen removal of wastewater. From the study which it sees it shared with manual operation and automatic operation it executed case3 branch mode of manual operation, the automatic operation executed a test in 2 branch mode. the influent it used the case synthesis wastewater of manual operation, manual operation result escape it did dynamic factor with automatic operation with base. The influent of automation operation used the life sewage, the SBR for a reaction mourning DO control it used the Inverter and a AD/DA covertion module, by a DO control the DO consistency was maintained 2~3㎎/L with. It shows the nitrogen remove efficiency above SBR automatic operation result 95% by automatic logic control. The automatic control logic and PLC programming it leads with automatic control and it control the sewage efficiency there to be a possibility escape of doing the operation factor for and a plan factor and a dynamic factor , SBR automatic operation it led and TCODcr 20㎎/L, T-N 5㎎/L, T-P 3㎎/L the Possibility of getting the stable control efficiency below it was. The study which it sees it led and the Kd which becomes escape and Y value appeared with 0.334day^(-1), 0.511 kg MLVSS/kg SCODcr each, this Kd of general activated sludge public law and Y value 0.06 day^(-l), 0.6kg MLVSS/kg SCODcr compared to appeared with the low-end thing.
1-Di-butylaminonaphthalene-5-Sulfonyl Chloride와 Pyridine 置換體와의 反應
成大東,李鍾八,朴現錫,金良姬 東亞大學校 大學院 1989 大學院論文集 Vol.14 No.-
Nucleophilic substitution reaction of bansyl chloride with mathyl substituted pyridines have been studied kinetically at 0℃ in methanol-acetonitrile binary solvent mixtures. The order of magnitude of reactivity is γ-picoline>β-picoline>pyridine to react with bansyl chloride. The Bronsted βand Hammett ??values indicated that the bond formation is advanced more than the bond breaking at the transition state. The reactivity of nucleophiles is in accord with charge controlled and the reactivity of substrate has shown an orbital controlled reaction.
중년여성의 볼링참여 전·후 및 참여정도에 따른 생활만족도 연구
성현출 한국스포츠리서치 2003 한국 스포츠 리서치 Vol.14 No.4
This study examines the motivation of middle-aged and aged women's participation in bowling before and after engaging in it, how they feel satisfaction from it depending on intensity of participation and aims to offer the materials for the diversification of programs tc induce continuous participation and popularization of bowling. The results of this study are as follows: 1. Participants' satisfaction with bowling before and after engaging in it showed a significant difference depending on their age, monthly income, education and job. As their age was higher, their satisfaction was also higher, monthly income group between over 1,500,000 won and less than 2,000,000 won before participation in bowling showed high satisfaction and health factor was higher in the group earning monthly income between over 500,000 won and less than 1,000,000 won. Satisfaction with bowing before and after engaging in it according to education was higher in university graduate group in all factors. 2. Middle-aged women's satisfaction with the intensity of participation in bowling before and after engaging in it was higher in the group which participated in it for over one year with the satisfaction of social and health factors. In addition, the group which participated in bowing twice a week had high satisfaction and the group which engaged in bowling over twice a week showed higher satisfaction in all factors.
신현무, 이상화 경성대학교 환경문제연구소 2000 環境硏報 Vol.10 No.1
Surfactant washing process being operated in ex-situ mode could be appropriate one of the most effective remediation alternatives for NAPLs(non-aqueous phase liquids) in soil. The adsorption of sufactants has been concern of the reduction of expenditure and the increase of efficiency. Through the result of estimating the extent of adsorption of surfactants to soils, notion sufactants showed higher adsorption to soils than anion surfactants. From the results of evaluating which model could explain the surfactant adsorption to soils, it was determined that anionic surfactants were described well with Langmuir adsorption isotherm model, while nonionic surfactants were with Freundlich model.
한국과 중국 법의학감정제도에 관한 고찰 : 중국의 제도 검토를 통한 한국의 제도 개선안을 중심으로
현용배,임성철 조선대학교 2001 The Medical Journal of Chosun University Vol.26 No.2
Background and objectives : The warrant system is originated from concept of the due process of law guaranteed by the Constitution and the warrant is a fundamental model to guarantee all human rights. However, in the aspects of legal autopsy it has some drawbacks because of overemphasis of the formalities prescribed by law. Sometimes it hampers to find the substantial truth. Thus, the authors want to find some solutions. Materials and methods : The authors review the medical examination system for legal autopsy in Korea and China, compare them each other, and try to find some suggestions. Results : There are big differences of warrant system for legal autopsy between Korean and Chinese. Moreover there is some merits in Chinese system. Conclusion : The authors propose some alternative methods to replace the Korean warrant system for legal autopsy.