Low doses of ionizing radiation suppress doxorubicin-induced senescence-like phenotypes by activation of ERK1/2 and suppression of p38 kinase in MCF7 human breast cancer cells

신재식,우상혁,이형찬,홍승우,유두현,홍석일,이왕재,이명석,진영우,안성관,진동훈,박인철 Sookmyung Women's University Research Institute of 2010 여성과 건강 Vol.6 No.1

齒科用非貴金屬合金의 微細組織과 硬度에 미치는 熱處理의 影響

柳相烈,成在鉉 慶北大學校 齒科大學 1985 慶北齒大論文集 Vol.2 No.1

The purpose of this study was to investigate the effect of heat treatment on microstructure and hardness of Ticonium Premium 100 alloy in different temperature and times for heat treatment. The first group was quenched in water after heating at 550, 700, 850, 1000℃ for 15 minutes: and the second group, after heating for 5, 30, 60, 120 minutes at 700℃. The hardness number of each specimen was obtained using the Rockwell hardnees tester, and the microstructure of each specimen was compared by means of photomi crograph taken by metallurgical microscope. The results were as follows: For a 15-minute duration, the higher the temperature of heat treatment, the higher the hardness of the alloy, but the hardness decreased at 1000℃. At 700℃, the longer the time of heat treatment, the higher the hardness, but the hardness decreased after the 60-minute period of heat treatment. Optimal temperature of heat treatment was 700-850℃ and the optimal time was less than 60 minutes. Microstructure of the heat-treated alloy showed dendritic structure similar to equi-axed structure, but appeared coarse at 1000℃. Microstructure of the alloy heat-treated at different times turned out to be similar to that of the alloy heat-treated at different temperatures, but coarse grains appeared at a 120 minute duration.

준설토의 건조수축에 의한 강도증가 특성과 지지력에 관한 연구

유남재,이종호,이명욱,김현주 강원대학교 산업기술연구소 2000 産業技術硏究 Vol.20 No.A

This research is results of experimental and numerical works on characteristic of strength increase and bearing capacity in dredged and reclaimed soil due to desiccation shrinkage. For a soil sampled from southern coastal area in Korea, basic soil property tests and standard consolidation test with falling head permeability tests were carried out to obtain consolidational characteristics of soil. Double cone penetration test. laboratory vane test and unconfined compression test were also performed to investigate the change of shear strength with degree of desiccation. Model tests were performed in 1G environment and 30G level artificially accelerated condition by using the centrifuge model test facilities to investigate the bearing capacity of desiccated ground. Test results were analyzed by using the bearing capacity of desiccated ground. Test results were analyzed by using the theoretical and load-settlement characteristics method proposed by Meyehof & Hanna(1978). On the other hands, the numerical technique, using the finite strain consolidation theory considering the effect of desiccation was used to estimate the appropriate time of using heavy construction equipments in field with respect to strength increase due to desiccation.

전자선과 불가사리 분말을 이용한 하수슬러지 탈수능 향상

유대현,이재광,이면주 한국환경과학회 2004 한국환경과학회지 Vol.13 No.7

This study was focused on the manufacturing method of a dewatering aid, which would reduce the water content of the sludge cake by enhancing the dewaterability of sewage sludge. The pretreatment technology for sludge by using radiation and among diverse discarded resources were starfish selected as the material to manufacture the dewatering aid. Starfish went through the process of washing, drying, and pulverizing. The starfish powder made in this process was applied to the digested sludge generated at the sewage treatment plant of D City, and its effects were investigated. The starfish powder that was 300 ㎛ in particle size was added to the irradiated digested sludge. After the application of the condensation process, the sludge with the starfish powder added was dewatered using the belt press and centrifuge, which were the traditional pressure dewatering devices. As the result, it reduced the water content of the sludge 20% higher than the dewatered cake with no dewatering aid added and irradiation. When the powder was added, it contributed to less use of the coagulant added. The more irradiation dose, the lower water content did the dewatered cake have and the more coagulant was needed for condensation, which seems to be a disadvantage that can be compensated for by the starfish dewatering aid. A small-scaled treatment of the study to a radiation technology and dewatering aid using a discarded resource confirmed the potential of dewaterability. Based on the results saying that the dewatering aid and radiation technology can improve dewatering effects using the traditional dewatering devices, this pretreatment technology will be expected to be applied to sewage treatment plants.

서울特別市의 都心構造에 對한 組査

兪在炫,黃仁子 梨花女子大學校 師範大學 社會生活科 1964 綠友硏究論集 Vol.- No.6

庶民主宅問題累的化現像의 要因分析에 關한 硏究

兪在賢 울산대학교 1978 연구논문집 Vol.9 No.1

한국의 주택문제의 특징은 인구와 주택재고수와 주택공급수와의 상관관계에서 볼 때 동적수급불균형에 의한 양적낙후성과 주택실수규모별 거주자수분포와 상관관계에서 볼때 정적과밀에 의한 질적 작후성으로 요약할 수 있다. 이런한 현상의 요인은 소비자 부담�력의 부족으로 인한 자력건설불가능계층의 누적화 경향과 공급구조의 모순으로 인한 주택문제 누적화 경향으로 분석할 수 있다. 이러한 문제를 해결하기 위해서는 정부 및 민가느이 각 공급주체별로 적절한 소득계층별 대상을 선정하여 각 계층의 실질부담 능력에 맞는 주택정책이 이루워져야 하고 자력건설불가능계층을 위해 정부의 임대주택건설을 위한 과감한 투자가 필요하며 저렴양산 주택건설을 위해 주택산업이 육성되어야 한다. The Characteristics of Korean housing problems are quantitative shortage caused by the unbalance of demand and supply of the view of FLOW, and qualitative shortage caused by overcrowding from the view fo STOCK. The Causes are the increase fo the class without capacity of self-help housing because of lower income and the increase fo housing shortage ratio because of the unreasonable housing supply mechanism. To slove this problems, the housing policy must be established according to the income, level, goverment housing must be concentrated on the rent housing for the lower income groups, and housing industy for the low-cost and mass production must be supproted.

Low doses of ionizing radiation suppress doxorubicin-induced senescence-like phenotypes by activation of ERK1/2 and suppression of p38 kinase in MCF7 human breast cancer cells

신재식,우상혁,이형찬,홍승우,유두현,홍석일,이왕재,이명석,진영우,안성관,진동훈,박인철 Sookmyung Women's University Research Institute of 2010 여성과 건강 Vol.6 No.1

치조골 복합골절의 정복고정시 탈구치아의 치근관을 통한 배농술의 효과

유재하,김현실,유태민,이지웅,김종배 大韓顎顔面成形再建外科學會 2002 Maxillofacial Plastic Reconstructive Surgery Vol.24 No.5

Treatment of compound alveolar bone fracture consists of reduction and fixation with wound closure of soft tissue laceration. For the proper reduction and fixation, interosseous wiring or splinting of the involved teeth are applied during about 4 weeks. But wound infection around the fracture site may be occurred, because of the presence of devitalized tissues(pulp, bone and soft tissue), residual hematoma and anergy effect of trauma stress. The wound infection results in bone resorption, pulp degeneration and necrosis, wound dehiscence and soft tissue necrosis around the fracture site. Therefore, if the infection will be expected, early proper drainage should be established via the fracture site and root canal of the luxated teeth. The authors treated two cases of compound alveolar bone fracture by the rubber drainage in the fracture site and the endodontic drainage by open canal of the luxated teeth, with the usual reduction and fixation by use of arch bar and resin. The prognosis was more favorable without wound infection, bone resorption, teeth mobility and specific root resorption.

「民宅三要」를 통하여본 韓國傳統住宅의 配置計劃論

兪在賢 울산대학교 1979 연구논문집 Vol.10 No.2

風水地理思想이 韓國傳統建築에 깊은 영향을 미친 것은 周知의 事實이다. 本論文에서는 住宅에 關聯된 陽宅論書中 韓國人 竹納孫瑜憲이 지은[民宅三要]를 分析하여, 正確히 坐向과 配置가 調査된 住宅의 平面實例와 比較하여 보았다. 이를 통해 風水地理思想이 韓國傳統住宅의 配置計劃에 미친 影響을 確認하고, 아울러 典型的인 吉宅配置 類型을 찾아 보고자 하였다. MIN-TAEG-SAM-YO, written by Korean scholor, Son, Yu-Heon, deals with Yang-Tag-Non, a branch of Feng-Shui theory in which the orientations of the houses are assumed to seriously influence the inhabitants. MIN-TAEG-SAM-YO, meaning "the Three Elements of the Houses" elaborates on the orientational interrelations among the three elements; the Gate, the Pricipal Room and the Kitchen. In the present paper, the contents of MIN-TAEG-SAM-YO are analyzed and a numbe of existing examples are checked to see how they comply to its contents. Finally, the preferable orientational sets are described in reference to MIN-TAEG-SAM-YO.

大型建築物의 合理的인 變電設備 容量基準에 관한 硏究

兪賢在,全勝九 大田工業大學 1992 한밭대학교 논문집 Vol.9 No.1

In this paper, we proposed the reasonable design standard of Demand Factor fo large office buildings, that was made by the statistical way considering autua conditions, such as investicated electric equipment capacity, electric power consumption etc. So as to save electric equipment investment, the decrease of power loss, the improvement of facilities utilization and the decrease of electric rates, we can be contribute by the application of the design standard. The result of saving effect is showed to confirm the practical use of the propose Demand Factor, and also, it is believed that this proposed Demand Factor will be useful in electric equipment operation and planning.