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Seon‑Hong Kim,Yoon‑Sik So,Jung‑Gu Kim 대한금속·재료학회 2020 METALS AND MATERIALS International Vol.26 No.11
To identify the effects of the stress concentration at the pit on the fracture of the district heating (DH) pipeline, the stressincrease with the wall thickness reduction was formulated. The formula includes the stress intensity factor with the pittingcorrosion. As a result of the application of the DH pipeline conditions to the ASME B31.3 code formula and corrosion test,the interplay with only uniform corrosion and stress due to the internal pressure can not be an immediate reason for the DHpipeline fracture. The KIvalue which is calculated by loss of thickness due to both uniform and localized corrosion exceededfracture toughness value (42 MPa√m) of the weldment pipeline steel (ASTM A106 Gr. B) under all of the studied conditions.
Jung‑Hun Lee,Min‑Su Park,Hong‑Seon Ahn,Kyung‑Won Park,Jun‑Seok Oh,Seung‑Gyu Jeon,Dong‑Kyu Kim,Jae‑Eon Kim 대한전기학회 2020 Journal of Electrical Engineering & Technology Vol.15 No.4
When large scales DG are connected to the distribution system of unidirectional power currents, bi-directional power currents are formed, making it impossible to use conventional overcurrent protection methods alone to detect and isolate fault sections for ground and short-circuit faults. To solve these problems, this study proposed the method of protection against single-line-ground fault of common neutral line multi-contact local power distribution system using distance relay and directional relay. The proposed protection method was applied to the common neutral multi-ground distribution system to validate the protection against single-line-ground fault through the PSCAD/EMTDC software package and efectively detect and isolate only the zone of single-line-ground fault without malfunctions.
Seon‑A Jang,Seung Namkoong,이성률,Jin Woo Lee,Yuna Park,Gyeongseop So,Sung Hyeok Kim,Mi‑Ja Kim,Ki‑Hyo Jang,Alberto P. Avolio,Sumudu V. S. Gangoda,Hyun Jung Koo,Myung Kyum Kim,Se Chan Kang,Eun‑Hwa Sohn 대한독성 유전단백체 학회 2020 Molecular & cellular toxicology Vol.16 No.1
Background Excessive intake of fat, one of the causes of obesity, is associated with low-grade infammation in various susceptible organs and eventually causes tissue toxicity. This study examines the multifaceted suppressive efects of Korean red ginseng extract (KRG) on high-fat diet (HFD)-induced lipotoxicity and infammatory responses in the aorta, liver, and brain. Methods Male C57BL/6 mice were fed HFD with or without KRG for 12 weeks. The improvement efect in KRG on lipotoxicity and infammatory potential was determined in the blood and the aorta, liver, and brain tissues. Results KRG signifcantly inhibited 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase activity by >20% in vitro. KRG supplementation suppressed HFD-associated body weight gain, lipid profle changes, and excessive fat deposition in the liver and increased leptin, insulin, and ALT levels in the blood. Infammatory markers in the aorta, liver, and brain were also signifcantly reduced by KRG treatment. In microvascular endothelial cells, the 15% cyclic stretch-mediated upregulation of ICAM-1 and vascular cell adhesion protein-1 (VCAM-1) expression was signifcantly attenuated in the presence of KRG. Conclusion KRG supplementation attenuates HFD-mediated body weight gain, lipid profle changes, and multi-tissue infammatory responses.
'中部地方家構法'에 대한 박길룡의 평가와 개량안 : 『中部朝鮮地方住家에 對한 一考察』을 중심으로
김명선,이정우 대한건축학회 2003 대한건축학회논문집 Vol.19 No.7
This study investigates Park, Kil-Ryong's " A study on the housing plan of the middle area of the Jo-Seon", which dorms early phase of his thought on housing improvement. But the importance of his study has not been noticed until now. For this reason this study aims to analyze his appreciation and suggestion for improvement of the housing plan of the middle area of Jo-Weon. The results of this study are the following: 1) His appreciation of traditional housing was on the functionalism and he focused on courtyard type plan. 2) But on this article, he presented three suggestions which are based on the traditional courtyard type plan. Those are unique examples considering the other housing plans of him are compact type. 3) Behind Park, Kil-Ryong's thought on the housing improvement, there is a evolutionistic way of thinking which explains housing improvement as an evolutional process, that is, the evolutionistic thinking represents all the way of life; eating, wearing and housing, rather than confines only to housing.
김정자,최순,김선희,정영숙,김경연,심혜숙,문소정 부산대학교 여성연구소 1999 여성학연구 Vol.9 No.1
The purpose of this study was to develop a program for the enhancement of Korean married women's quality of life(LQ) based on the results of the first year study(1996) and the second year research(1998). In order to construct a program, a psycological type test was conducted to 505 women and four preliminary programs were carried out focusing on self-esteem, understanding of one's own personality dynamics, efficient communication, positive emotion, social belongingness and expressions of feelings of unfinished business. For the final program, Jung's theory of psychological type(MBTI), Satir's family therapy approach and psychodrama were applied. An experimental and a control group were designed consisting 16 women for each group. The program was carried out for 6 weeks for the experimental group. The result of treatment were as follows: l)There was a difference statistically in LQ related to family harmony, self-achievement and improvement of relationship with in-laws. 2)There was a statistical change in psychological factors of expression of feelings, self-esttem, communication, and positive emotions. 3) The program participants self reports indicate that the program was effective for the reconstruction of family relationship, self-understanding, group coherence, and instillation of hope. The reports also shows that the program was effective for the perceptual changes in parent-child, wife-husband and siblings' relationships. In conclusion, the program developed for the enhancement of Korean married women's life quality(LQ) based on the Jung's psychological type theory, Satir's family therapy approach and psychodrama was effective for the improvement of LQ.
토당귀 종자의 형태적 특성과 발아와 입모율에 대한 저장방법,생장조절제 및 프라이밍 처리 효과
안희정,안복주,·김도현,·안영섭,·김영국,박춘근,이상원,·박충범·차선우,·송범헌, 忠北大學校 農業科學硏究所 2015 農業科學硏究 Vol.31 No.1
This study was conducted to have basic and applied informations to establish the cultivation method and to improve the cultivation techniques of Angelica gigas Nakai through investigating the rates of germination and seedling establishment with treatment of plant growth regulator and seed priming. The germination rates of round shape seed were about 0.3~12% higher than those of parallel shape. The germination rates with different storage durations were increased at the level of 25oC and 4oC with the storage days, while they were clearly higher at -20oC compared to those at 4oC and 25oC without the storage durations. With the results of germination rates with treating of plant growth regulator and seed priming, their rates with the round shape seeds were comparatively higher about 6% than those with parallel shape seed and they were increased with increasing of the storage durations. The germination rates were generally appeared higher with GA3 than did those with seed priming. The highest germination rate was appeared at 50 ppm GA3 of plant growth regulator and at -0.5 MPa PEG6000 of seed priming. The germination rates?ㅤ ?ㅤ of Angelica gigas were different with different temperature, storage durations and the treatments of plant growth regulator and seed priming. These results could be used according to different cultivating conditions.
정문희,이선혜 한양대학교 의과대학 1997 한양의대 학술지 Vol.17 No.2
This study was conducted to find out for what goals the old used senior citizens' centers with the focus on typical characteristics of urban and rural areas. 58 respondents were chosen through the matched sampling technique by age, education, spouse and religion, and 58 questionnaires were statistically analyzed by means of SPSS. The most influential variable on social activities (eg. keeping friends, gathering information, etc) was 'number of games' in both urban and rural areas. On the other hand, the most influential variables on non-social activities (eg. making money) or individual-oriented activities (eg. enjoying games) were 'age' and 'number of games or picnics' respectively in urban and rural areas. These results show us that goal-oriented activities in rural areas are far more limited than in urban areas and more various games for them need to be well organized by group unit.