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이현종 강원대학교 부설 석재복합신소재 제품연구센터 2003 석재연 논문집 Vol.8 No.-
본 연구에서는 규화목의 형성에 관여하는 규산염 광물을 목재와의 복합화에 이용하여 난연성, 내구성, 칫수안정성 등의 성능을 겸비한 재료의 제조를 목적으로 규산염으로서 규산나트륨을 사용하여 무기질 복합화 목재를 제조를 시도하였다. 실리케이트 원료로 규산나트륨을 목재내에 주입하고 이를 무기염, 산, 무수초산으로 처리하여 불용성의 무기질을 목재내에 형성시켰다. 규산나트륨의 농도가 증가할수록 중량증가율은 증가하였으며, 감압주입법과 확산침투성 사이에는 거의 차이가 없었다. 무기질은 주로 가도관, 도관 등의 세포내강에 형성되었다. 무기염으로 처리한 무기질 복합화목재는 난연효과가 명확히 나타났으며, 반면 무수초산으로 처리한 무기질 복합목재는 목재내에 아세틸기가 도입되어 항팽윤효과를 나타냈다. In this study, to make a composite materials from wood and a mineral by utilizing silicate, inorganic substances were produced by the impregnation of sodium silicate into the wood followed by precipitation with inorganic salts, acids and acetic anhydride. The weight percent gains increased with increases in the concentrations of the sodium silicate, and there was little difference in them between the vacuum-impregnating and the diffusion-penetrating processes. Inorganic substances were observed to be deposited in the luminia of tracheids, vesseis, and other components. In organic salts-treated composites obviously have a fire-resisting effect, whitens the composites made with acetic anhydride were relatively less hygroscopic, and they have a good antiswelling efficiencies.
뇌졸중 후 중추성 통증 환자에 대한 동서협진이 진통과 재활에 미치는 영향
이현종,김수영,이상훈,서동민,이두익,김건식,이재동,이윤호,양형인,박재경,최도영,Lee, Hyun-jong,Kim, Su-young,Lee, Sang-hoon,Seo, Dong-min,Lee, Doo-ik,Kim, Keun-sik,Lee, Jae-dong,Lee, Yun-ho,Yang, Hyung-in,Park, Jae-kyung,Choi, Do-young 대한침구의학회 2003 대한침구의학회지 Vol.20 No.2
Purpose : In order to study the effectiveness of East-West pain treatment on central poststroke pain(CPSP), we evaluated its effect on alleviation of pain and rehabilitation of CPSP patients who were treated with eletroacupuncture and west pain treatment for four weeks. Methods : Twenty four patients diagnosed by their pain characteristics of central pain form stroke were treated with sympathetic nerve block, gabapentin, amitriptyline, and electroacupuncture for four weeks. Pain intensity through the visual analogue scale(VAS), and improvements of mobility and rehabilitation through the modified Barthel index(MBI) and Rankin scale(RS), respectively, before and after pain treatment were also assessed. Results : VAS pain scores were significantly improved from $7.7{\pm}1.7$ to $4.4{\pm}2.0$ with pain treatment(p<0.05). In accordance with improvement of ain scores, RS and MBI scores ere also improved from $2.88{\pm}0.95$ to $2.13{\pm}1.01$ and from $83.0{\pm}16.9$ to $94.7{\pm}9.5$(p<0.05), respectively, with pain treatment(p<0.05). Conclusions : It was suggested that the active pain treatment was contributed to the rehabilitation of CPSP patients, resulting in improvement of quality of life of CPSP patients. Futhermore, East pain treatment in combination with West pain treatment may be useful modality to alleviate CPSP.
交通經濟學의 開拓者 : 특히 獨逸學者를 中心으로 Specialby in Germany
李顯鍾 단국대학교 1976 論文集 Vol.10 No.-
Transports coordinate space, time, matter and man. The more wide the space, the more time is needed to coordinate matter or man at a certain time and/or a certain place. In an economic aspect, time is money and is strongly related to capital and manpower. Transport system is a fundamental of the society, politically, socially, culturely, military, etc. These facts are established by many distinguished scholars during the last century in Europe, who are not known of in Korea because the economics of transport is quite unknown in Korea in spite of her relative high developement in the concerned field. So not a few economic planners encounter difficulties in transport problems. In this report German transport economists are dealt with. Anglo-Saxon data will be discussed in a future study report. Friedrich List owes his theory to his life and experiences in the United States, and emphasizes the greater importance of the railway than that of the canal. He illustrates the cheapness of railway construction, higher productivity of capital invested, and the easiness of differential charging in comparison with the shiff transfort on canal. Though List favours railway transport, he does not always insist on the railway construction. But the criterion whether railway or canal should be used depends on the technical standards and the fiscal ability of the concerned country. Karl Knies stands for the State's operation of the railway because the railway can be constructed only by the State due to the huge amount of capital needed. He sees communications systems also as a transport medium, and its function as equalizing prices on different markets and times. Gustav Cohn puts much weight on the public interest. That is why he allows for the monopolizing of the railway. According to him the deficit caused in railway operation should not be covered by the governmental budget, the railway should feed itself through the tariff system made through the principle of private enterprise. Gustav Schmoller pointed out the effected of the advanced transport system; the more the transport system developed, the more influense on the economy in different regions, the more radical variation in the population in different regions, the more faster the family system changed. Erich Sax contributed greatly to the development of the undeveloped economics of transport in Germany. The existence of the economics of transport as an independent science is attributed to him. The qualitative development in transport systems has an influence on two aspect, largely direct and indirect; the former, for example, price lowering, enlargement of market and equalizing of prices on different markets, and the latter, enlargement of production, movement of the local economy to the world economy, development of marchandizing channels, and equalizing of rent and wages in different regions.
李鉉淙 숙명여자대학교 학생위원회 1978 淑大學報 Vol.18 No.-
구한말에 있어서 세대차를 볼 때 오늘날처럼 구별할만큼 사회적 조건이 되었던 것은 아니였다. 오늘날은 학교교육이 제도적으로 잘 짜여 있어서 연령측정이 되며 거기에 따라서 세대설정이라고 할까, 거의 모든 사람들을 어느 선상으로 획정할만한 것이 그다지 없었다. 그 당시 세대차라고 할 수 있는 것은 지역적으로 또는 사회신분이나 계층이나 지식에 의해서 부분적으로 확정되어진 것이므로 오늘날처럼 선을 그어서 보기는 어렵다. 그러나 그들은 새로운 지식이나 또는 국사를 의논할 때를 중심으로 해서 연령에 상관없는 하나의 그룹이 한 세대를 이루어가고 있는 때도 있으며 하나의 선을 긋게 되는 경우가 있다.
李賢鐘 제주대학교 1977 논문집 Vol.9 No.-
Study was conducted to elucidate the properties, the equilibrium of soluble casein under low temperature condition(4℃). The results obtained are summarized as follows: 1. The low temperature treatment affected to the costituents of soluble casein,mainly increased the amount of ?-casein.However, within the micelle two types of casein were found by solubility under low temperature. 2. It was found that the equilibrium was exsisted between micellar and soluble casein under low temperature. 3. It was assumed that the ?-casein which released from the micelle bonds on the surface of micelle and contribute to the stability of casein micelle for the various circumstances.