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성열욱,신경순 한국학교수학회 2001 韓國學校數學會論文集 Vol.4 No.2
It is necessary that at any rate we try to decrease underachievers by learning deficiency in mathematics to extreme limits under circumstances that mathematics becomes more requires daily in the 21st century's informative society. However, the traditional teaching method causes a lot of problems in elevating the needed ability for the newly changing society. Accordingly, for the purpose of letting underachievers by learning deficiency have much interest in mathematics, seek the qualitative elevation, have the feelings of self-confidence and accomplishments, escape from desperation, and also teachers choose the activities of small groups, design teaching plans, apply those to teaching-learning activities and finally verify the effect, this researcher sets up a hypothesis as follows: 1. The teaching method through small groups will be effective for the accomplishments of underachievers in mathematics. 2. Its method will bring out the meaningful change in the emotional areas of mathematics. Therefore, so as to prove the above hypothesis, the results through the theoretical approach and practicing learning by small groups have turned out to be positive.
성국경,이봉근,윤성일 공주영상정보대학 2001 논문집 Vol.8 No.-
본 논문에서는 전자 상거래를 위해 암호 기술의 확장성 측면에서 우수한 공개키 기반 하부 구조에서의 공개키 인증 기술을 중심으로 분석하였고, 인증기관에서 발급하고 있는 인증서의 기능을 보강함으로써 인증기관의 신뢰도를 높일 수 있는 신뢰성을 강화한 인증 시스템을 설계하였다. 공개키 기반 인증 기술은 전자 상거래 서비스에서 필요한 신분 인증, 거래 내역 인증 및 지불 처리 인증에 사용하는 기반 기술이다. 이는 공개키를 보증하는 기반 기술과 인증서의 안전한 사용 기술 등이 필요하며 전자 상거래를 실현하기 위한 필수적인 선결 사항이다. 인터넷이라는 불안전한 개발형 전산망 구조에서 안전한 전자 상거래를 제공하려면 향후 국제적인 인증 서비스와의 연동을 위한 표준화된 인증 기술의 적용이 중요하다. 현재까지 정보의 공유라는 원칙에서 발전해 온 인터넷은 앞으로 전자상거래나 전자화폐 등이 인터넷상에 등장함으로 인해 정보의 보호라는 새로운 원칙을 바탕으로 발전해 나아갈 것이다. 이러한 정보보호시대에 살아 남기 위해서는 종속적이 아닌 독자적인 암호화 기술과 데이터 인증기술의 개발이 절실하게 필요한데, 여기에 인증국의 중요성이 부각된다. 현재 암호화 기술은 어느 정도 신뢰를 줄 만큼 발전해 있지만 아직까지 데이터 인증을 위한 기반구조가 명확히 성립되어 있지 않은 상태이다. 앞으로 인증국을 기반으로 한 공개키 기반구조 확립이 빠른 시일 안에 이루어 져야 할 것이다.
성낙창,박현석,이성식,이용희,이종팔,윤태경 한국환경과학회 2004 한국환경과학회지 Vol.13 No.1
The effect of ozone on the formation and the removal of disinfection byproducts(DBPs) of chlorination process was studied to elucidate the performance of water treatment process. The samples of raw water, prechlorination process, and preozonation process were analyzed quantitatively according to the Standard Methods for the Examination of drinking water. As a result, most of total trihalomethanes(THMs) which were formed in prechlorine treatment process was not removed in the preozonation process. Most of haloacetic acids(HAAs), haloacetonitriles(HANs), and chloral hydrate(CH) was removed in sedimentation and biological activated carbon(BAC) filtration processes. However, DBPs were increased more or less by postchlorine step. In particular, the formation of THMs and HAAs depends on ozone more than chlorine, but, the formation of HANs and CH depends on chlorine more than ozone. The seasonal variation of DBPs concentration for the year needs to be investigated to study the temperature effect because DBPs strongly depend on temperature among various efficient factors.
성영호,김경호,최태훈 龍仁大學校 體育科學硏究所 1999 體育科學硏究論叢 Vol.9 No.1
This research intends to examine the physical fitness factor of high school and university mate tennis players. Eight tests were performed and the factor analysis was used to examine the fitness level. Therefore, we will now discuss this research's conclusion. Within the factor structure, three factors for high school males(strength, endurance, agility), and four factors for university males(endurance, agility, strength, flexibility) were sampled and we can see that university athletes are more specialized than high school athletes. Therefore, we can see that for high school students, strength is an important factor, while for university students, endurance is an important factor.
윤성우,이지영,하경호,이수경,한나,배효근,박선자 고신대학교 의과대학 2010 고신대학교 의과대학 학술지 Vol.25 No.2
Limy bile is a rare condition characterized by excessive precipitation of calcium carbonate in the gallbladder or bile duct. Recently we experienced two cases with obstructive jaundice in which limy bile in the common bile duct but not in the gallbladder for one case, and in the common bile duct and intra hepatic duct but not in the gallbladder for another case. The patients were treated by endoscopic sphincterotomy. Here, we report the cases and review the literature.
추간판탈출증 환자중 레이져시술과 비시술 그룹간의 12주 운동의 효과
성경훈,김명준,석혜경 대한스포츠의학회 1999 대한스포츠의학회지 Vol.17 No.1
The purpose of this study were to compare the lumbar extensor strength between laser discectomy and Non-Op patients group in HIVD before and after 12weeks training. To evaluate lumbar extensor strength of total 60 patients with HIVD, Lumbar extensor strength was measured in 20 PELD patient group. 20 OLM patient group, and 20 Non operation patient group by Medx lumbar extension machine(PELD: Percutaneus Endoscope Laser Discectomy, OLM: Open Laser Microscope). Training was conducted twice per week for 12wks and consisted of one set of 15-18 repetitions of Variable resistance lumbar extension until volitional fatigue. After 12weeks in male, Maximum voluntary lumbar extension strength was appear rate of increase 65.57% in PELD group, 51.68% in OLM group, and 70.93% in Non-op group. After 12weedks in female, appear rate of increase 61.90% in PELD group, 55.41% in OLM group, and 78.54% in Non-op group. In 3 group, Male lumbar extension strength was no statistically significant difference (P>.05). Female was statistically significant(P<.05). Male group was appear lower than Male Norms(P<.05 and female group was appear similar to and higher than Female Norms(p<.05). Lumbar flex/ext ratio of the three group was 2.48:1 pre-training and 1.558"1 post-training in lumbar flexion 72 and 0 degree. The ration of post-training was lesser than before training.