林土의 有機物의 分解速度와 無機養料의 垂直分布에 關한 考察

金遵敏,張楠基,鄭玩鎬 서울대학교 교육대학원 학술연구회 1966 論文集 - 서울대학교 교육대학원 Vol.3 No.-

Kim Choon Min, Chang Nam Kee and Chung Whan Ho: Decomposition rate of plant residue and the vertical distibution of mineral nutrients in the woodland soil. The relationship between decomposition rate of litter and the amount of mineral nutrients dispersed to the soil horizons were studied on the oak and pine forest stand. The results are as follows: 1. Decomposition rate of litter was highest in the F horizon of the oak stand, however in the pine stand it was highest in H horizon. 2. The correlation coefficients between decomposition rate and humus, organic carbon, moisture content, calcium, phosphorus, and nitrogen in the pine stand are; 0.90, 0.98, 0.76, 0.98, and 0.88, in oak stand; 0.97, 0.93, 0.92, 0.97, 0.74 and 0.73. 3. Factors which affect the decomposition rate of litter are humus, organic carbon, moisture content, calcium, phosphorus and nitrogen. 4. Among the variables, PH, moisture content and phosphorus under the oak and pine forest showed significant differences in each horizon. 5. C/N ratio of pine stands is higher than that of oak stands studied. 6. The vertical distribution of mineral nutrients is highly related with the amount of humus accumulated on top soil.

디지털콘텐츠산업 발전비전 도출방안 연구

노시춘,방기천 남서울대학교 2011 남서울대학교 논문집 Vol.17 No.2

Economic crisis, efforts to overcome the digital contents industry development at home and abroad have been racing in the country's future lies in the digital contents industry. Therefore, the digital contents industry through vision, model identification knowledge-based global digital contents market-based deployment is required. For research purposes the digital contents industry to derive an alternative to national industrial development that will lay the groundwork. The deployment order for the first digital contents industry, SWOT analysis performed to derive the Korean-specific model. As a result, measures based on the advancement of digital content industry as a long-term vision and specific goals are presented as staged. The age of convergence of the u-media content markets in government, corporations, consumers, and these form the structure of a virtuous cycle distribution systems for energy by being active, synergistic effects are obtained. First of all internal and external content, industry-based to ensure that growth is key. Vision of the digital contents, the growth momentum of the national social development policies as a role model by changing the sequence of events need to go. Key Words :Digital Contents, Creative Industry, Digital Contents Policy, Vision Model

우리 나라 17~18世紀의 食文化에 關한 硏究

姜椿基 서강정보대학 1988 論文集 Vol.7 No.-

제약적 최소자승추정을 이용한 미분기반 다중계층 광류 추정

김영춘,신용달,권기구 永同大學校 2001 硏究論叢 Vol.7 No.1

본 논문에서는 광류 제약 방정식(optical flow constraint equation) 및 영상의 공간적인 상관성을 고려하여 제약적 최소자승추정(constrained least square estimation)을 이용한 미분기반 다중계층(multiscale) 광류 추정 방법을 제안하였다. 제안한 방법은 인접한 화소간의 움직임 속도가 유사하다는 가정 하에 다중계층으로 광류를 추정하였다. 또한 본 논문에서는 광류 제약 방정식 및 인접한 화소간의 움직임 속도가 유사하다는 가정에 의하여 발생하는 오차를 줄이기 위한 정제(refinement) 방법도 제안하였다. 제안한 방법이 기존의 방법에 비하여 더욱 정확하게 광류를 추정할 수 있음을 실험을 통하여 확인하였다. In this paper, we propose a gradient-based multiscale optical flow estimation method using the constrained least-square estimation, considering the spatial correlation of the image. The basic assumption of the proposed method is that the neighboring pixels are having a similar velocity. Also we propose a refinement method to decrease the error, reviving optical flow constraint equation and neighboring pixels are having a similar velocity. Experimental results show that the proposed method can more accurately estimate the optical flow than the conventional methods.

Ag와 Cu結晶面에 不活性元素의 吸着Energy

崔春泰,李起芳 全北大學校 基礎科學硏究所 1980 基礎科學 Vol.3 No.1

The adsorption phenomena of the metal surface can be ascribed to the Van der Waals force. We estimated the Van der Waals interaction between inert gas and the crystal surface (100), (110), and(111) of the transition metal Ag and Cu employing the equation of Mahanty-Taylor. Calculating the adsorption energy, we assumed that as inert gas adsorbed on the metal surface has close-packed structure, the surface is non-activated unifrom, and there is no lateral interaction between adsorbed adspecies. It is found that the adsorption energy of an inert gas adsorbed on Cu almost equals to that of the same element on Ag surface, while the adsorption energy increases as the mass of inert gas element increases.

전화상담

이기춘 漢陽大學校 學生生活硏究所 1991 大學生活硏究 Vol.9 No.-

Drosophila busckii의 韓國集團에서 있어서 同位酵素 多形現象

成耆昌,尙椿植,金彧,金大鎰 성균관대학교 기초과학연구소 1985 論文集 Vol.36 No.1

Genetic structure and variability were investigated in four Korean populations of Drosophila busckii. Eight allozyme loci were analysed by means of starch gel electrophoresis. The proportions of polymorphic loci and loci heterozygous per individual were estimated to be 0.25 and 0.051, respectively. The average genetic similarity between four populations was found to be S―=0.977. This value is similar to the other Drosophila populations reported. However, the gene variation of D. busckii in this study appeared to be the least variable among 28 Drosophila species reported. It is suggested that the low gene variation in D. busckii might be due to adaptation of this species to a narrow niche, but the possibility of occurrence of the random drift cannot be excluded.

하천 교각의 각도에 따른 수위영향 연구

李吉春,沈基五 단국대학교 1995 論文集 Vol.29 No.-

A study on the effect of the angle between the channel and the bridge piers on the increase in water level in the case of a sloped channel was carried out and the following conclusions were made. When the angle between the channel and the piers of 0°was taken as reference, the percentage rise in water level with the incline exhibited a maximum at 45°. That is the grater the slope, the more intense was the percentage rise in the water level; 11%, 5%, 3% and 3% when the slope was 1/200, 1/300, 1/400 and 1/500 respectively. When the percentage rise in the water level with the magnitude of the angle between the channel and the piers was averaged over various slopes, the average increase was 2.3%, 4.5% and 5.5% for 15°, 30° and 45° showing a gradual increase. Application of the Froude number, which is a characteristic factor of an open channel, suggested that the flow of water was inferior when the slope was steeper, while the opposite condition was observed when no hydraulic structures (piers) were present. Since increases in the slope and the angle between the channel and the piers restrict the flow of water, care must be exercised in the design of hydraulic structures, especially those for urban small channels, when steep slopes and excessive angles between the channel and the piers are to be utilized.

개별환경제어(PEM)시스템의 운용에 따른 건물의 에너지절약성에 관한 연구

송인춘,구현덕,김기세,나기태,김병수 忠南大學校 産業技術硏究所 1999 산업기술연구논문집 Vol.14 No.1

The building energy conservation possibility by introducing personal environment module(PEM)system was analyzed by DOE-2.1E building energy analysis program on the 6 stories office building. The results showed energy consumption of the building with PEM system could be increased more than the conventional VAV system when the occupant was not decreased. But the energy consumption rate in the building with PEM could be equal to VAV system when approximately 20% of the occupant is decreased. As a result, basically PEM system can consume more about 9.2%energy than the VAV system, but it can also have the possibility to save energy about 11.4% if it is operating with energy conservative way.

백일해 백신이 Streptozotocin 유발성 당뇨백서의 당대사에 미치는 영향

박상기,문경래,박춘호,김갑승,박영봉,이병래,양남웅 朝鮮大學校 附設 醫學硏究所 1991 The Medical Journal of Chosun University Vol.16 No.1

Streptozotocin(STZ) may produce a permanent form of insulin-dependent diabetes (IDD) in experimental animals. This STZ-induced diabetes has become an useful model to study the pathogenesis of IDD in man primarily because it approximate clinical findings and also because it lends itself easily to controlled manipulation. The diabetogenic activity of STZ, however, is known to be modified by several agents such as nicotinamide, diazoxide, adrenergic blockers and pertussis vaccine (PV). The present study was undertaken to observe the protective effect of PV or boiled pertussis vaccine(bPV; incubating the PV at 80℃ for 30 minutes) against the development of IDD induced by STZ in young rats, and also the effect of PV on the activities of glycolytic & gluconeogeneic enzymes in both liver and muscle of rat. PV at a dose of 1.2×10^(10) microorganism was administrated intrapntoneally on 3days before & 7days after a single injection of STZ (GO㎎/㎏ body wt). The blood glucose and insulin levels were measured at 1st wk, 2nd wk, 4th wk, 6th wk and 8th wk after STZ injection, and the enzyme activities were exemined at 8th wk. The following results were obtained. 1. No significant difference was noted in blood glucose levels between STZ group and STZ+PV or STZ+bPV groups (P>0.05). 2. Blood insulin levels in STZ group decreased significantly from 2nd wk(P<0.05). Compared with STZ group, blood insulin levels in STZ+PV & STZ+bPV groups were higher, but not a significant value except at 2nd wk in STZ+PV grouP (P<0.05). 3. Compared with STZ group, hepatic glycolytic enzyme activities were significantly increased in STZ+PV or STZ+bPV groups, and muscular glycolytic enzyme activities were significantly increased in STZ+PV or STZ+bPV groups. 4. Compared with STZ group, hepatic gluconeogeneic enzyme activities were significantly increased in STZ+PV or STZ+bPV groups. These results suggest that the PV has somewhat protective effects on blood insulin levels and tissue glycolytic enzyme activities in rats, but it could not reduced blood glucose levels significantly, probably because of excessive increase of hepatic gluconeogeneic enzymes.