식물플라크톤의 세포외배출유기물을 고려한 소양호의 1차생산과 유기물 부하

남궁현,김범철,황길순,최광순,김철구 江原大學校 附設 環境硏究所 2001 環境硏究 Vol.18 No.-

The autochthonous and allochthonous organic carbon loading were measured in Lake Soyang, to estimate the amount of carbon loading into the lake and the contribution of their sources to the lake's carbon loading. Autochthonous carbon loading was estimated from phytoplankton primary production with the extracellular organic carbon(EOC). Allochthonous loding was determined by measuring dissolved organic carbon(DOC) and particulate organic carbon(POC) concentration in the main inflowing Soyang River. Both autochthonous and allochthonous organic carbon loading were high during the summer, from July to September, and accounted for 43.2% and 71.7% of the annual loading, respectively. Primary productivity was elevated up to 1,000 mgCm^(-2)d^(-1)during summer and lowest in winter. EOC production from phytoplankton was also large in summer, resulting in a high DOC concentration in the lake water. Primary production of phytoplankton and allochthonous organic matter loading from the watershed contributed to 53.6% and 46.4% of total loading, respectively. The EOC production accounted for 4.4~21.2% of POC primary production, implying that EOC production of phytolankton must be considered in estimation of primary production.

Centering to the boys' high school team : 남자 고등부를 중심으로 Centering to the boy's high school team

남궁옥,원충희 公州大學校스포츠科學硏究所 1995 스포츠科學硏究所論文集 Vol.- No.9

29 Boy's High school Hockey teams took part in the 36th National Assortment Hockey Championship Series, the 74th national Athletic Meeting and '94 Springtime National man and women Hockey competition which were held in 1993. Investgating the number of shooting and success rate in 43 games, I came to conclusion as follows : 1) In whole shooting, the number of shots in the area D was 48.89%, in the area B was 27.91%, in the area C was 19.07%, in order of shootings (p<.10). Success rate of shooting was about 26% in each A, B and C area, and it was comparatively high. 2) In angle shooting, the area Ⅲ marked 62.78% which was the highest success rate.(P<.10). The area Ⅳ marked 20.37%, and the area Ⅱ 13.19%. The success rate of shooting in the area was Ⅱ, Ⅲ, Ⅳ 23.73%, 23.60%, 20.91% which suggests the balanced distribution. Especially the success rate of shooting in the area I was 50%. and it says that boldness in shooting is very necessary. 3) In many kinds of shootings, penalty corner shooting was 39.44%, assist by pass was 23.89%, loose ball was 14.63%(P< .50). The score of penalty corner shootings was 35.78% which marked the highest goals. In assist by pass, solo dribble, free hit and penalty corner except penalty stroke, the success rate of shooting was 23.75% on the average. 4) At the position of stick used in shooting, fore position was the highest frequeney in use. It was 91.1%(P< .01). One touch action shooting was 59.63% which marked the highest frequency in shooting(P< .05). The rate of score was 51.22%, but in the success rate of shooting, direct action shooting is higher 32.18% than that. 5) Hit and push shooting was 84.07% of the whole shootings. Push shooting was the best in the rate of score(P< .05). In the success rate of shooting, flick shooting(51.35%), was higher than push shooting (27.27%).

老人들의 公園訪問 滿足度와 生活滿足度 影響要因 分析

김경철,김교준 龍仁大學校 1997 용인대학교 논문집 Vol.13 No.-

The study aimed to investigate how the selected factors affected to park visit satisfaction and life satisfaction of senior citizens dwelling in metropolitan area. The sample size was 554 male and female seniors aged 60 and over, and the data were collected at three city parks during the month of October 1995. And the data were analyzed by Chi-square test and Logistic regression. The results were varied in each survey area, however, it indicated that the higher aged led to the more frequent park visit, and the higher park visit satisfaction(〈Table 5, 7〉). Analysis also showed that the selected determinants influenced park visit satisfaction and life satisfaction in varied degrees, however, park visit satisfaction was affected proportionately, by acquainting with new people, visit motivations, freqencies of visit, park activities, and duration of stay in park(〈Table 12〉) , and life satisfaction was influenced by park visit satisfaction, visit motivations, duration of stay in park, and acquainting with new people proportionately(〈Table 16〉).

악관절조영술이 악관절 조직에 미치는 영향에 대한 병리조직학적 연구

나경수,조봉혜 大韓口腔顎顔面 放射線學會 1992 Imaging Science in Dentistry Vol.22 No.1

The study was performed to observe the effects of arthrography on the tissues of temporomandibular joint histopathologically. Among 17 rabbits(34 joints), 2(4 joints) were used as normal control group, others (30 joints) were experimentally arthrographed using 0.03 ml diatrizoate meglumine (Hypaque meglumine 60, Wintrop, U.S.A). The rabbits were sacrificed at 2-hour, 1-, 2-, 4- and 7-day after experiment and the tissues of temporomandibular joint were prepared according to the usual method for light microscopic examination. The results were as follows: 1. There were no changes of the fibrous connective tissues of the condylar fossa, the fibrous connective tissues and hyaline cartilages of the condyle, and the articular disk. 2. In 2-hour experimental group, the proliferation of the surface synovial membrane cells, the congestion and hemorrage of the vessels were observed. 3. In 1 and 2-day experimental group, minimal lymphocytes infiltration was observed with the proliferation of the surface synovial membrane cells, the congestion and hemorrage of the vessels. 4. In 4-day experimental group, the diminution of the proliferation of the surface synovial membrane cells was seen, but there was no vascular changes. 5. In 7-day experimental group, the tissues showed similar appearance to the normal control group.

山地小流域의 雨水流出特性 (Kinematic wave法에 의한 流出解析) : Runoff characteristics in small mountain-basin (Runoff analysis of kinematic runoff model)

南官達 충북대학교 농업과학기술연구소 1986 農業科學硏究 Vol.4 No.-

In this paper, runoff analysis in small mountain area are discussed on the basis of observed data in the san sung basin. Outline of the results are summarized as follows. The peak runoff coefficients are 0.21 to 0.38 in the san sung basin. The value of equivalent roughness N(m sec.) defined in the kinematic wave method for inclined surface seems to be 1.0 in this basin and are close to the optimum coefficients. Runoff from watershed such as hills and fields is estimated by applying the kinematic runoff model. The results of runoff analysis show good coincidence with observed hydrograph and verify the usefulness of the criterion for estimation the value of equivalent roughness.

광중합 복합레진의 색상과 깊이에 따른 중합도의 비교

최경호,이주현,박호원 大韓小兒齒科學會 2004 大韓小兒齒科學會誌 Vol.31 No.2

치과용 수복재료가 요구하는 심미성과 치아의 보존 및 편의성 등의 여러 조건들을 만족시키기 위해서 치과용 복합레진은 적절한 중합이 이루어져 물리적 기계적 성질을 충족하고, 색조의 안전성, 중합시의 수축과 이에 따른 변연 적합도 문제를 해결할 수 있어야 한다. 본 연구에서는 광중합 복합레진 Z250의 색상과 두께를 달리 하여 광투과도와 중합도를 각각 적외선 분광분석법과 미세경도 측정을 통해 비교하여 다음과 같은 결과를 얻었다. 1. 플라즈만 아크 중합기의 사용 시 3초 중합과 6초 중합의 경우로 나누어 실험하였으며 6초 중합에 있어서 할로겐 중합 20초와 유사한 광투과도 및 미세경도를 나타내었다. 2. 광중합 복합레진의 색상을 A1, A2, A3, A3.5로 나누어 실험한 결과 레진의 표면에서는 색상별로 광투과도나 경도의 차이가 나타나지 않았으나, 2, 3, 4㎜로 깊이가 증가함에 따라 색상에 따른 광투과도나 경도의 차이가 확연하게 나타났고 특히 색상이 어두워질수록 4㎜의 깊이에서 중합도가 더욱 낮았다. 3. 중합깊이의 비교를 위하여 0, 2, 3, 4㎜ 깊이로 나누어 실험한 결과, 2㎜이상의 깊이에 있어서는 미반응 단량체의 양이 유의하게 많은 것으로 나타났다. 4. 광중합 복합레진의 광투과도를 알아보는 FTIR을 통한 단량체 전환도와 미세경도 측정경도 측정사이에는 유의한 상관관계를 보였다. Adequate polymerization is a crucial factor in obtaining optimal physical properties and clinical performance of resin composite restorative materials. The purpose of this study was to determine the effectiveness of shade and depth on dental composite resin polymerized with plasma arc curing unit employing FTIR and microhardness. From this experiment, the following results were obtained : 1. The light transmission and microhardness by mode 6 in plasma arc curing were similar to by 20 sees in halogen light curing. 2. The experimental groups of A1, A2, A3, A3.5 were not significant difference to light transmission and microhardness on surface and 2mm depth, but were significant difference on 3mm and 4mm depth. Especially light, transmission and microhardness were small in darker shade and deeper thickness 3. Compared with depth cure, uncured monomer amount increased at more than 2mm depth. 4. The light transmission by FTIR and polymerization by microhardness were significant corelation.

Nickel 觸媒에 의한 일산화탄소의 轉化反應에 관한 硏究

姜京熙 단국대학교 1988 論文集 Vol.22 No.-

The Conversion of Carbon monoxide to Carbon dioxde on Nickel Catalyst was investigated by Continuous reaction technique Nickel Catalyst were Prepared by the sream distillation pure Nickel hydroxide under Vacuum(Ca, 10^-2 Torr) at 290℃ for three hours and Characterized by means of X-ray diffraction and BET studies. The Nickel Catalyst is investigated by residual gas analysis for differential partial pressure of carbon monoxide and oxygen and temperature from 220℃ to 290℃. The Kinetic analysis of conversion data indicates the occurrence of first order, also molratio of p_O2/P_CO is 1.3. The activation energy of Nickel catalyst was 12.5Kcal/mole, also, equation of reaction Velocity is rate V=Ae^(-2.29×104/Rt) P^0.99_CO P^9.50_Po2

선형 시스템의 모델 축약에 관한 연구

金慶哲,崔炯範 홍익대학교 산업기술연구소 1998 産業技術 Vol.8 No.-

The modelling of complex dynamic system is one of the most important subjects in engineering. A model is often too complicated to be used in real problems so approximation procedures are often used to achieve simpler models than the original one. The concepts of impulse energy approximation is introduced. The reduced model in obtained from the most significant pairs of alpha and beta parameters. There exists errors because from the most significant pairs of alpha and beta parameters. There exists errors because of the truncation. To overcome this problem an improved impulse energy technique is presented in the paper by appropriately selection alpha and beta parameters. There exists error because of the truncation. To overcome this problem an improved impulse energy technique is presented in paper by appropriately selecting alpha and beta parameters to retain more impulse response of the original system. This algorithm is programed using MATLAB language. A reduced-order model for the excitation system of power plants as an example study is considered This technique seems to be easy to perform and shows a good simulation results.

성공적 정부개혁을 위한 동인(動因)으로서의 조직문화

朴慶孝 한국외국어대학교 사회과학연구소 1999 社會科學論集 Vol.17 No.-

英語의 二重子音 小考

朴慶洙 中央大學校 人文科學硏究所 1989 人文學硏究 Vol.16 No.-