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DPC/Brij 35 혼합계면활성제의 미셀화에 대한 열역학적 연구
길한내,이병환 한국기술교육대학교 2006 論文集 Vol.13 No.1
The critical micelle concentrations (CMC) and the counter ion binding constants (B) in a micellar state of the mixed surfactant systems of 1-dodecylpyridinium chloride (DPC) with polyoxyethylene(23) lauryl ether(Brij 35) in water were determined as a function of a_(1) (the overall mole fraction of DPC) by the use of electric conductivity method and surface tensiometer method from 15℃ to 35℃. Various thermodynamic parameters (△S^(o)_(m), △H^(o)_(m), and △G^(o)_(m)) for the micellization of DPC/Brij 35 mixtures were calculated and analyzed from the temperature dependence of CMC values. The measured values of △G^(o)_(m) are all negative, but the values of △S^(o)_(m) and △H^(o)_(m) are all positive or negative, depending on the measured temperature and a_(1).
接解性 Sports와 非接解性 Sports의 Personality traits에 關한 比較硏究
姜秉吉,南悳鉉 牧園大學校 1987 論文集 - 牧園大學校 Vol.13 No.-
A study on the personality traits of the contacting and non-contacting game players has been made by administering a test of standardization on the players of judo, rugby, soccerball, gymnastics, volley ball, athletics and shooting. The result of the test turned out as follows: 1. On the general point of view, the players of soccer-ball (contacting sports) and those of athletics(non-contacting sports)have the meaningfully high points on all the aspects of the personality traits except on the aspect of impulse. 2. The players of gymnastics and shooting have higher points of stability campared with the players of the other sports owing to the optimistic personality traits of their general lives. 3. While the players of rugby (contacting sports) have the low points on the aspects of impulse and sociality unlike the original expectation, the players of athletics(contacting sports) have much higher points than those of players of soccer-ball, rugby, and judo (non-contacting sports) on the aspect of consideration. 4. On the aspect of sociality, the players of soccer-ball (contacting sports) have very high points compared with those of the other sports owing to the cooperation of their life in a group.
Increased Carotenoid Production in Petite Mutants of Phaffia rhodozyma
안길환,박병순 선문대학교 자연과학대학 1998 자연과학대학 논문집 Vol.1 No.-
마이토콘드리아의 돌연변이는 Phaffia rhodozyma에서 carotenoid의 생산을 증대시켰다. 마이토콘드리아의 호흡 돌연변이는 acriflavine과 ethidium bromide를 이용하여 유도되었다. 총 9개의 시험된 호흡 돌연변이주 중 7개가 모 균주에 비하여 증대된 carotenoid를 생산하였다. 호홉 돌연변이주에서 활성산소의 생산이 증대되고 이것이 carotenoid의 생산을 증대시킨 것으로 사료된다. Mitochondrial mutation increased carotenoid production in Phaffia rhodozyma. Mitochondrial petite mutants were selected after treatment with acriflavine and ethidium bromide. Seven out of nine petite mutants, tested, produced increased carotenoid compared to their parent strain. Increased reactive oxygen species might be produced in the petite mutants, and this caused carotenoid production.
봉다발 내 온도장 해설을 위한 개발된 난류 Prandtl 수 모델의 액체금속에 대한 적용성 비교 검증
허병길,정창현,김 신 제주대학교 공과대학 첨단기술연구소 2001 尖端技術硏究所論文集 Vol.12 No.2
A comparative analysis with the existing models was performed to verify the applicability of liquid metal whose turbulent Prandtl number model had been developed for the temperature field analysis in rod bundle geometry. The suggested model was compared to the Zeggel's model, Jischa & Rieke's model and constant model(Pr_T = 0.9) with varying P/D and Pe´clet number. The suggested model considered the effect of anisotropy, the position distribution and the molecular Prandtl number and the Zeggel's model used in VANTACY-Ⅱ code. The Jischa & Rieke's model was the base of Zeggel's model. Results of the suggested model showed better agreement with those of the well-known empirical correlations than those by other models.
방향성 응고된 이상형 스테인레스강에서 질소첨가가 미세조직에 미치는 영향
최병학,정병길,김진우,고석민,이재현,김상식,김성준 국립7개대학공동논문집간행위원회 2001 공업기술연구 Vol.1 No.-
Microstructures in the directionally solidified duplex stainless steels were investigated in order to understand the effect of nitrogen addition. It was found that the addition of nitrogen causes formation of fine precipitates in a matrix and segregation phases of nitrogen in the α/γ interface. Both the fine precipitates and the segregation phases were identified CrN(fcc, a=4.16A˚), which has the coherent phase relationship with bcc α matrix of (200) CrN // (0 1 ̄ 1) α and (1 ̄1 ̄ 1) CrN // ( 3 ̄ 2 ̄ 1) α.
정길수,박병수,전상현,유남재 강원대학교 산업기술연구소 2006 産業技術硏究 Vol.26 No.B
This study is the result of experimental and numerical study on the consolidational behavior of multi-layered soft soil ground installed with plastic board drains (PBD). Centrifuge model tests with a marine clay sampled from field were performed to investigate the consolidational behavior of multi layered ground where a dredged soil was placed on the soft clay ground and PBDs were installed. Test results were compared with those of numerical analyses, using the 2-D equivalent model previously proposed. From test resuts, it was found that the amount of consolidation settlement occurred in the original ground due to embankment surcharge loads was in the range of 38% of total settlement in the whole ground. From the results of cone penetration tests executed after finishing the centrifuge model tests, the cone resistance was found to increase with depth. The measured water contents inbetween PBDs were in the ranges of 38~50% and their values tended to increase with increasing the distance between PBDs.
전통문화축제에 대한 관광객의 참여 지각이 사후태도에 미치는 영향
장병수,박재길 문화관광연구학회 2002 문화관광연구 Vol.4 No.4
This study focuses on positively identifying the correlation between the recognition process affecting tourists' attitude and their post attitude in terms of traditional culture festival, thus to forecast their attitude. In this viewpoint, the study models were designed and the corresponding hypotheses were established in detail based on such models. Statistical processing of collected data was analyzed with SPSS/WIN statistical package. Finally, as a result of analyzing tourists' recognition, it was shown that there was higher score in participation rate, recognition and satisfaction in terms of Cheongdo Bull Fighting Festival, which was already established as a regional traditional culture festival. In particular, this festival reflected local feature and differential characters so well and was recognized as a festival with the international potential.
Poly-(dimethylsiloxane) Chain의 Configuration 성질
서길수,이병석 嶺南大學校 工業技術硏究所 1988 연구보고 Vol.16 No.1
We have been undertaken to compare the characteristic ratio <r²>。/nl² for the poly-(dimet-hylsiloxane) calculated by using trans-gauche rotational isomeric states model and the characte-ristic ratio deduced from intrinsic viscosity in two solvent: (ⅰ) θ-solvent(methyl ethyl ketone) at 20℃ and (ⅱ) benzene at 20℃. Though it is in good accordance between the calculated values and the experimental values in case of the molecular weight above 10⁴, it is not below 10⁴. The conformational specific heat dE conf/dT calculated near Tg is 0.03 cal/g℃. From this result, the importance of the contribution of conformational specific heat to the observed ΔCp has been recognized.
李丙吉 대구산업정보대학 1990 논문집 Vol.4 No.-
The purpose of this consideration is in finding the method of determining wage level is conceded by both employee and employer, whenever spring comes, industry disputes occur which are due to the view of difference on the raise in wages. These disputes result in less which is fatal to our economy on national dimension. This study suggests the productivity wages system which is seemed to eliminate this loss. Nowadays, raise in wages influences a rise in price. The rise in price causes the raise in wages. This is called as the vicious circle. The productivity wages system means that wages should be determined by productivity improvement.