서울의 Penicillinase Producing Neisseria gonorrhoeae 발생빈도(1998)

김재홍,김준호,반재용,이정우,황성주,정준규,정성태,강진문,조흔정,홍창의,정혜신,이한승,김이선,이봉길,이종호,선영우,한기덕,윤성필,이성훈,안종성,박석범,문승현,조항래,김형섭,류지호,황재영,박준홍,손상욱 한양대학교 의과대학 2001 한양의대 학술지 Vol.21 No.1

In recent years, gonorrhea has been pandemic and remains one of the most common STDs in the world, especially in developing countries. For the detection of a more effective therapeutic regimen and assessing the prevalence of Penicillinase Producing Neisseria gonorrhoeae(PPNG), we have been trying to study the patients who have visited the Venereal Disease Clinic of Choong-Ku Public Health Center in Seoul since 1980 by menas of the chromogenic cephalosporin method. In 1998, 93 strians of N. genorrhoeae were isolated, among which 60(64.5%) were PPNG. The prevalence of PPNG in Seoul, which had been decreased to 39% in 1996 after a peak of 74.3% in 1993, is increased to 64.5% in 1998.

메탄에 의한 이산화탄소 개질반응의 탄소침적에 관한 연구

조영복,김상채,유의연 全南大學校 觸媒硏究所 2002 觸媒硏究 論文集 Vol.23 No.-

A study on the carbon deposion of nickel catalysts for carbon dioxide reforming by methane was performed. The experiments were carried out at atmospheric pressure using a fixed bed flow reactor. The results of TEM/EDS showed that the forms of the deposited carbons were filamentous carbon and encapsulated carbon. The deposited carbon on Ni/TiO_2 revealed only encapsulated carbon. The deactivation of Ni/TiO_2 catalyst was mainly resulted from the encapsulated carbon. Encapsulated and filamentous carbon were found on Ni/α-Al_2O_3, compared to the Ni/TiO_2. The deposited carbon on Ni/La_2O_3 revealed mainly filamentous carbon. In spite of the large amount of coke formation on Ni/La_2O_3, filament carbon did not deactivate the catalyst. Using TPH results, two types of coke have been identified. One was more reactive carbidic carbon at lower temperature peak, the other was less reactive graphite one at higher temperature peak.

메탄에 의한 이산화탄소 개질반응에서 니켈 촉매의 반응특성

조영복,김상채,유의연 전남대학교 촉매연구소 2000 觸媒硏究 論文集 Vol.22 No.-

A study on the reaction characteristics of nickel catalysts for carbon dioxide reforming of methane was performed. The experiments were carried out at atmospheric pressure using a fixed bed flow reactor. Effects of reaction parameters on catalytic activity and carbon deposition were investigated. The carbon deposition on the catalysts was affected by reaction conditions such as temperature, molar ratio (CO2/CH4). While the formation of coke was increased as the reaction temperature increase, it was reduced above 700℃ by reverse Boudouard reaction, which is known to cause the vaporization of carbon.

멀티미디어를 이용한 統計學習 코스웨어 設計 및 具現

조성의 木浦大學校 情報産業硏究所 1998 情報産業硏究誌 Vol.6 No.-

오늘날 교육현장에서 CAI 프로그램을 이용한 학습도구의 활용은 교육의 질향상에 많은 영향을 끼치고 있다. 본 논문에서는 멀티미디어시스템을 이용한 초등학교 통계학습 코스웨어를 설계하여 이를 학습현장에 적용시키고 학습자의 높은 관심과 수업집중을 기하여 다양한 정보에 기초한 학습, 다양한 개성에 부응하는 학습으로서의 기대효과와 멀티미디어를 이용한 학습도구의 개발에 일조한다.

이산화탄소에 의한 메탄 개질반응에서 니켈계 담지촉매의 탄소 침적에 관한 연구

조영복,선우창신,김상채,유의연 全南大學校 觸媒硏究所 1998 觸媒硏究 論文集 Vol.20 No.-

The reforming of methane by carbon dioxide is studied over nickel based catalysts, which compared the influence of the support in catalyst activity and carbon deposition. The experiments were carried out at atmospheric pressure using a fixed bad flow reactor. The catalytic activity and carbon deposition is influenced by support. The Ni/α-Al₂O₃showed high methane conversion. The Ni/La₂O₃ showed high methane conversion, but the reactor was plugged in 15 h. The carbon deposition was observed in all nickel based catalysts. Compared to Ni/α-Al₂O₃, Ni/La₂O₃, catalyst showed higher whisker carbon formation. Whisker carbon was not observed in the Ni/MnO₂. The carbon deposition of the nickel based catalysts increased in the order MnO₂〈SiO₂〈α-Al₂O₃〈TiO₂〈La₂O₃. The carbon deposition on the catalysts was affected by reaction conditions such as temperature, molar ratio(CO₂/CH₄).

ARCS 모델을 이용한 컴퓨터 매개 수업에서의 동기유발 전략

조성의 국립7개대학공동논문집간행위원회 2002 공업기술연구 Vol.2 No.-

After CMI(Computer Mediated Instruction) has been becoming widely used, motivation student one of to work concerns in CMI. When student's are using computers in study, student's motivation is higher because of the first explosion to computer. However student's are once being accostumed to and its use, Not only the novel effect for their study is faded out slowly but also their interest to computer is diminished. Thus, it is important to develop method for student's motivation evoking strategy in CMI. To this end, ARCS model is applied to develop the strategy. In this thesis four elements of ARCS model are defined, and the sub elements of the defined four elements are provided as motivation strategy and motivation design.

니켈 담지촉매상에서 메탄의 이산화탄소 개질반응 : 담체 및 조촉매에 의한 탄소침적

조영복,김상채,유의연 전남대학교 촉매연구소 2000 觸媒硏究 論文集 Vol.21 No.-

The reforming of methane by carbon dioxide is studied over nickel based catalysts, which compared the influence of the support and promoter on catalyst activity and carbon deposition. The experiments were carried out at atmospheric pressure using a fixed bed flow reactor. The carbon deposition was observed in all nickel based catalysts. The results of TEM/EDS showed that the forms of the deposited carbon revealed filamentous carbon and encapsulated carbon. In the Ni-K/Al2O3, its activity was maintaned over 72 hours at 700℃ without deactivation. Any type of the coke deposition was not observed on Ni-K/ Al2O3 catalyst.

섬유종류 및 잔골재용적비에 따른 HPFRCC의 공학적 특성에 관한 실험적 연구

이의배,이동혁,나철성,조봉석,김재환,김무한 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1(구조계)

In general, concrete showed brittle fracture but HPFRCC(High Performance fiber reinforced cementitious composite) showed ultra high ductile behavior in the hardened state, because of the fiber bridging properties. So a variety of experiments have being performed to access the performance of HPFRCC recently. In this study, to develope HPFRCC with high ductility and strain capacity, effects of fiber types and sand volume fraction were investigated. And results of this study were as follows; · HPFRCC reinforced with PVA or hybrid fiber were superior to PP or singleness. · Effect of sand volume fraction on HPFRCC reinforced with PP was insignificant.

테니스 양손 백핸드 드라이브 동작의 운동학적 분석

김의환,조효구,성영호,김성섭 한국운동역학회 2001 한국운동역학회지 Vol.11 No.1

The purpose of this study was to analysis the kinematic variables of two-handed backhand drive in tennis pretending just as real competition situation. Two male Korean juvenile top player(Left lead handed type) who was gold medalists and awarded in national championships 2000, was filmed on 16mm high speed cameras(Photo-sonic co., 100fps, from the front, side view) on performing in two-handed backhand drive in tennis stroke throughout the ball machine(Lob star co., 50km/h. on ball speed) by the method of three-dimensional analysis. The kinematic variables, temporal, posture were computer through film analysis. The results were as follows; 1) Temporal variable : In elapesd time by phase, the backswing showed the longest time(0.73∼0.23 sec.,) and the next was forward swing(0.39∼0.42 sec.), and then the follow through was followed(0.20∼0.23 sec.), and the total elapsed time was 1.35∼1.40 sec. 2) Posture variables : The right angles of the elbow decreased from the ready position to the follow through by gradually(145 ˚→77 ˚, 146 ˚ →92 ˚). When impact, the left angle increased. When follow through, showed a different pattern between subject A(increased) and subject B(decreased). The shoulder angle increase from the ready position to the backswing. When impact, it decreased, and when follow through, it increased again, and it showed the same pattern in right and left. The hip angle decreased from the ready position to the backswing, and when impact and follow through, it was shown as a little increase, and this means that when backswing, the posture was flexioned, and when impact and follow through, it swinged extensioned by gradually. In case knee angle, sub. A was swing small-scale deviation(129 ˚→165 ˚: 36 ˚), sub. B was swing large-scale deviation(117 ˚→163 ˚, 46 ˚), between flexion and extension in right and left. Generally reviewing the variable of posture by this result, we could see that sub. A's swing motion was more unstable, swing deviation more larger, and sub. B's swing motion was mort stable, swing deviation more smaller.

악성흑색종과 양성멜라닌세포성모반에서 bcl-2 단백발현에 관한 면역조직화학적 연구

이성열,이종석,김현조,정현,조현듯,김의한 순천향의학연구소 2001 Journal of Soonchunhyang Medical Science Vol.7 No.2

Background: The bcl-2 protein, contrast to p53, has been shown to be suppress the apoptosis, and overexpression of the bcl-2 protein has been reported in several malignant tumors. Although how the bcl-2 protein takes part in tumorigenesis has not been proved, the bcl-2 positive tumors appeared to have good prognosis in some malignant tumors. The expression pattern of the bcl-2 in melanocytic nevi and malignant melanoma have not been well known. The authors analyzed immunohistochemically expression of the bcl-2 protein to investigate the role of the bcl-2 protein in developing malignant melanoma. Method: 10 malignant melanoma and 10 benign melanocytic nevi were immunostained with anti-bcl-2 monoclonal antibody. Results: In malignant melanoma, 1 case was 2+ positive, 9 cases were 3+ positive. In benign melanocytic nevi, 2 cases were 2+ positive, 8 cases were 3+ positive. Conclusion: Bcl-2 protein is expressed by benign melanocytic nevi and malignant melanoma. There is no difference of bcl-2 protein expression in melanocytic nevi and malignant melanoma.