테트라히드로디시크로펜타디엔의 아다만탄으로의 전위반응에 대한 금속희토류교환 제올라이트 촉매의 활성과 선택성

趙容錫,姜判祚 西原大學校 基礎科學硏究所 1992 基礎科學硏究論叢 Vol.6 No.-

Bifunctional catalysts metals on supported on Y zeolite exchanged by rare-earth ion (RE*), have high catalystic activity for the synthesis of adamantane from tetrahydrocyclopentadiene(TCD) in the presence of hydrogen and hydrogen chloride. These catalysts were prepared by the impregnation of metal salts with RE-Y zeolite. Their activity was measured by the batch reactor system. The TCD conversion consists of two reactions, the rearrangement of TCD to adamantane and hydrocracking to ring opening products(C??H?? isomer). No tarry materials were produced in the TCD conversion over bifunctional catalysts in the presence of hydrogen. The activity of metals supported on RE-Y for hydrocracking of TCD varied in proportion to the %d character of the metals. While for the rearrangement, it was independent of the %d character of the metals. In the case of a binary system of platinium and Rhenium the maximum activity for both reaction was observed at Re/(re+Pt) = 0.24. Furthermore poisoning by atomic sulfure on a bifunctional catalyst, the activity for the hydrocracking of TCD was depressed.

先加力 후 補修-補强한 鐵筋콘크리트 壓縮部材의 構造特性에 관한 實驗的 硏究

신용석,최진석,김판선,조철희,손순채,김정섭 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2(구조계)

This study examined the Stress and structural characteristics of reinforced concrete compressive member repair and strengthening by CFS and GFS after pre-loading. The following results were obtained. The results of compressive testing by the kind of fiber suggested that: In CFS, Specimen increased by about 26.9% and strengthening after pre-loading, by about 111.8%, compared with after strengthening, In GFS, Specimen increased by about 69.0% and repaired and models after pre-loading, by about 76.7%, compared with after strengthening. In the compressive testing, strengthen with CFS-Specimen showed a brittle fracture and strengthen with GFS-Specimen represented ductile fracture. More increasing in stress of Specimen, and repair and Strengthening specimen after pre-loading than loading specimen after strengthening suggested the strengthen effect of fiber.

AR 파라메타의 강인한 추정방법과 음성향상을 위한 적용

하판봉,이기용 國立 昌原大學校 産業技術硏究所 1992 産技硏論文集 Vol.6 No.-

기존 선형예측방법은 성도특성을 추정하는데 두가지의 주요한 문제점(음원의 특성에 의한 추정의 정확도, 가산배경잡음에 의한 추정정확도의 감소)을 가지고 있다. 이러한 문제를 다음과 같이 해결한다: 첫째, 구동잡음이 가우시안과 라프라시안의 혼합으로 본 강인한 AR모델을 사용하여 성도의 파라메타를 구한다. 이때, 잡음이 없는 환경에서 얻어진 음성신호를 이용한다. 두번째로는 위의 방법과 강인한 Kalman 필터를 사용하는 방법을 제안하고, 잡음에 오염된 음성을 향상시키기 위하여 사용하였다.

콘크리트용 잔골재로서 고막 패각의 활용성에 관한 연구

신용석,이설,김판선,조철희,김정섭 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1(구조계)

1) As a result of compressive strength experiment, rupture compressive strength showed more increases in specimens of 15% and 20% of Cockle shells in those of non-mixture. Comparing compressive strength between no-mixed Specimens and Specimens of containing Cockle shells, Specimens containing Cockle shells showed higher strength in 60 days of age, and as ark Cockle is contained and age is elapsed, compressive strength is also increased. 2) To sum up the above experimental results, it is found that using splitted Cockle shells as aggregate for concrete by 10% - 20% showed the same or higher compressive strength and shear strength as concretes using general aggregate and it can be used as substitute aggregate of concrete. It is considered that for future use of splitted Cockle shells as substitute concrete aggregate, continuous researches of its durability, applicability and economy are needed.

中都市 大學生들의 健康追求行態에 關한 硏究 : 吸煙 및 飮酒實態를 中心으로 With the Viewpoint of Smoking and Drinking Status

鄭善太,權判根,鄭成浩,洪大容 慶尙大學校 1985 論文集 Vol.24 No.2

The survey was conducted on health persuit behavioral patern of 1227 university students in medium city with the viewpoint of smoking and drinking status during the months of April and May, 1985. The main findings were as follows: 1. 40.3%of the male students surveyed were smoking cigarettes. 2. Smoking rates were significantly different by sex, grade, age, specialty and residence, respectively (P<0.01). 3. 84.1 % of smokers were smoking below 1 pack of cigarettes per day and smoking amounts were not significantly different by grade, sex, age, special ty and residence. 4. The duration of smoking were significantly different by grade and sex. 5. The amounts of drinking were significantly different by sex, age, specialty and residence, respectively (P<0.01). 6. The favorite kinds of liquor were significantly different by grade and sex (F<0.01), age and specialty (P<0.05), respectively. 7. "Optimistic prone students" were revealed to be heavy drinker. 8. Students who have high self-esteem scale were revealed to be heavy drinker. 9. The knowledge of health effects of smoking was significantly different between smoker and non-smoke. 10. Smokers were drinking more than non-smokers. 11. The rates of smoking were higher in "pessimistic prone students" than in "optimistic prone students." 12. According to the multiple classification analysis, non variables selected affected on amounts of smoking. 13. According to the multiple classification analysis, amounts of drinking were significantly affected by smoking-or-not, the knowledge of health effects of alcohol, personality and self-esteem variables.

레슬링 선수들의 정신건강에 관한 연구

장호성,구용판 龍仁大學校 武道硏究所 2003 武道硏究所誌 Vol.14 No.1

The purpose of this study is to determine how wrestler's sex, age, match experience and education level relate to his/her psychological health. A sample group was formed from 197 male and female players (senior high-school level or higher) who participated in the 2002 Korean Wrestling Tournament. The players are registered with the Korea Wrestling Federation. The questionnaire, which contained total 94 questions (i.e., 4 on sociodemographic characteristics and 90 on psychological health-related factors), showed the confidence level falling between .5006 and .8844 (Cronbach's alpha). The study, which relied on frequency analysis, t-test One-way ANOVA, and Scheffe test, produced the following results. First, wrestler's psychological health showed no statistically significant difference with regard to all sub-variables depending on sex. Second, wrestler's psychological health showed a statistically significant difference regarding overall psychological health, somatizing disorder, obsession, oversensitivity to others, depression and hostility depending on age while no difference was noticed regarding insecurity, fear, paranoia and psychosis. Third, wrestler's psychological health showed a statistically significant difference regarding overall psychological health, somatizing disorder, obsession, depression, paranoia and psychosis depending on match experience while no difference was noticed regarding oversensitivity to others, insecurity hostility and fear. Fourth, wrestlers' psychological health showed a statistically significant difference regarding overall psychological health, somatizing disorder, obsession, depression, insecurity and hostility depending on education level while no difference was noticed regarding oversensitivity to others, fear, paranoia and psychosis.

LMC와 RSLMC의 열팽창 특성에 관한 연구

임홍범,최성용,최판길,윤경구 江原大學校 産業技術硏究所 2004 産業技術硏究 Vol.24 No.A

Latex modification of concrete provides the material with higher flexural strength, as well as high bond strength and reduced water permeability. However, If the thermal expansion properties of overlay concrete (latex-modified concretes) are big different from that of substrate (ordinary portland cement concrete), these would cause a big interfacial stresses and result in premature failure. Therefore, the purposes of this study were to investigate thermal expansion characteristics of latex-modified concrete with cement types. The result of thermal expansion showed the coefficient of thermal expansion of concretes increased with latex inclusion. The coefficient of thermal expansion of RSLMC was a little smaller than that of LMC, which might be due to the finer cement grain, compacter internal, and stiffer properties of concrete. However, the coefficients of LMC and RSLMC were quite similar to that of ordinary cement concrete. Thus, this would not cause an interfacial stresses and will enable to ensure long-term performance of concrete bridge deck overlays.

조강시멘트를 사용한 라텍스개질 콘크리트의 보수재료 개발

윤경구,김동호,최성용,최판길 강원대학교 부설 석재복합신소재 제품연구센터 2004 석재연 논문집 Vol.9 No.-

The purpose of this research was to develop an available repair material to solve the problem such as coherence, construction period and economic performance that the repair material of existing water-construction have. The latex was good at coherence and resistance of permeability and the high-early cement shorten construction period through the early strength development. Therefore, in this study, we tried to develop the High-Early Strength Latex Modified Concrete(below ; HESLMC) combining these two characteristics. First, to find the optimum mixtures according to the construction criteria, slump condition, the maximum size of coarse aggregate and the antifoam agent adjusting air-content were selected as the major variables. The unit weight of cement and percentage of fine aggregate were fixed by 400 kg and 50 %, respectively. The suitable content of latex was 15% with considering the situation of inside and outside of the country. Second, the strength tests in order to estimate the mechanical characteristics were carried out and the permeability test of chloride ion and scaling test were carried out to estimate of durability of HESLMC, respectively. In all experimental variables, the results of strength test showed that the compressive strengths and flexural strengths, at 3 days after placement, were more than 21 MPa and 4.5 MPa, respectively. Especially, the resistance of permeability was excellent when compared to that of High Early-Strength Concrete(below ; HESC). 본 연구의 목적은 기존 콘크리트 수리구조물 보수재료가 갖는 부착성, 시공기간 및 경제성의 문제를 해결하기 위한 적절한 보수재료 개발에 있다. 따라서 본 논문에서는 부착성 및 장기공용성이 우수한 라텍스의 특성과 조기강도발현을 통해 공기단축이 가능한 조강시멘트의 특성이 결합된 조강형 라텍스개질 콘크리트를 개발하고자 하였다. 첫째로 HESLMC의 시공조건에 따른 최적배합도출을 위하여 슬럼프조건, 굵은 골재 최대치수 및 소포제량을 주 변수로 설정하였다. 국내외 여건을 고려하여 단위 시멘트량과 잔골재율은 각각 400 kg, 50 %로 적정 라텍스 함량은 15 %로 하였다. 둘째로 역학적 특성 파악을 위한 강도실험과 내구성 특성을 파악하기 위한 투수저항성 실험과 표면박리저항성 실험을 실시하였다. 강도측정결과는 모든 변수에 있어 재령 3일의 압축강도가 21 MPa, 휨강도가 4.5 MPa 넘어 초기강도를 만족하는 것으로 나타났다. 특히, 투수저항성은 HESC와 비교하여 상당히 우수하게 나타났다.

동물과 사람유래 Vancomycin 내성 장구균의 항균제 감수성 비교

조윤상,이희수,김종만,류판동,박용호,유한상,이문한 한국수의공중보건학회 2003 예방수의학회지 Vol.27 No.1

It has been recently reported the possibility in the bansfer of antimicrobial resistance to other animals and humans. In particular, vancomycin resistant enterococci (VRE), which have been known as a principal antimicrobial resistant bacteria in humans, have been increased as a pathogen of nosocomial infections. And then animal VRE were suspected as an origin of human VRE. In this study, we isolated Enterococcus spp. from animals, identified by bio- chemical tests, examined for antimicrobial susceptibility, and then compared the antimicrobial susceptibility of VRE among each other as well as human VRE. Enterococcus iecium (29%) was predominant in Enterococcus species (n=122) isolated from animal feces in this study. E. hirae, E. iecalis, E. casseliflam and E. gallinarum were also isolated as rates of 24%, 21%, 16% and 7%, respectively. The resistance of enterococci to penicillin and tetracycline were 66% and 78%, respectively, and the susceptibility of them to chloramphenicol was 66%. Antimicrobial susceptibility test has shown that 91% of VRE from humans (n=11) was susceptible to chloramphenicol and all resistant to penicillin, rifampin and streptomycin. Seventy-five percentage of VRE from chickens (n = 12) was susceptible to rifampin and resistances of them to penicillin, tetracycline and sbeptomycin were 75%, 83%, and l00%, respectively. Therefore, we confirmed the difference of antimicrobial susceptibility from animals and humans, and the antimicrobial susceptibility test could be one of the simple and useful methods for the epidemiological survey of VRE.

레슬링 선수들의 정신건강에 관한 연구

장호성,최종균,구용판 龍仁大學校 體育科學硏究所 2003 體育科學硏究論叢 Vol.13 No.1

The purpose of this study is to determine how a wrestler's sex, age, match experience and education level relate to his/her psychological health. A sample group was formed from 197 male and female players (senior high-school level or higher) who participated in the 2002 Korean Wrestling Tournament. The players are registered with the Korea Wrestling Federation. The questionnaire, which contained total 94 questions (i.e., 4 on sociodemographic characteristics and 90 on psychological health-related factors), showed the confidence level falling between .5006 and .8844 (Cronbach's alpha). The study, which relied on frequency analysis, t-test, One-way ANOVA, and Scheffe test, produced the following results. First, wrestlers' psychological health showed no statistically significant difference with regard to all sub-variables depending on sex. Second, wrestlers' psychological health showed a statistically significant difference regarding overall psychological health, somatizing disorder, obsession, oversensitivity to others, depression and hostility depending on age while no difference was noticed regarding insecurity, fear, paranoia and psychosis. Third, wrestlers' psychological health showed a statistically significant difference regarding overall psychological health, somatizing disorder, obsession, depression, paranoia and psychosis depending on match experience while no difference was noticed regarding oversensitivity to others, insecurity, hostility and fear. Fourth, wrestlers' psychological health showed a statistically significant difference regarding overall psychological health, somatizing disorder, obsession, depression, insecurity and hostility depending on education level while no difference was noticed regarding oversensitivity to others, fear, paranoia and psychosis.