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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‑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.
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.
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.
'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.
폐 기능 검사에 의뢰된 환자에서의 공황발작의 빈도와 특성
정 건,고정선 大韓神經精神醫學會 1998 신경정신의학 Vol.37 No.6
연구 목적 : 저자들은 폐 기능 검사에 의뢰된 내과 환자들에서 공황발작의 빈도를 알아보고 공황발작과 불안의 민감도 그리고 폐 기능과의 연관성을 알아보려 하였다. 방 법 : 종합병원에서 폐 기능 검사에 의뢰된 대상자들에게 공황발작 설문지와 Beck의 불안검사, 그리고 특성 불안검사의 설문지를 작성케 하였다. 결 과 : 55명의 폐 기능 검사를 받은 대상자중 16명(29.1%)이 공황발작을 경험하였다. 공황발작을 경험한 집단이 경험하지 못한 집단보다 Beck의 불안 검사 점수와 특성 불안검사 점수가 모두 의미 있게 높았다. 폐기능검사 이상 유무에 따른 비교에서는 공황발작의 유병율에 의미 있는 차이가 없었고, Beck의 불안검사의 특성불안 검사에서도 의미 있는 차이가 없었다. 결 론 : 폐 기능검사를 받은 환자에서 공황발작의 유병율이 높았으나 이들환자들 중에서 적절한 정신과 치료를 받는 사람은 거의 없었다. 공황 발작은 불안의 민감도와 연관이 있었지만 폐 기능장애와의 연관이 없었다. Objectives : This research aims to measure the prevalence of panic attack among the internal patients who were referred to pulmonary function test and to ascertain the relationship of panic attack to the anxiety sensitivity and funker to pulmonary function. Methods : The research was conducted in a general hospital through the questionnaire survey. The patients completed the panic attack Questionnaire(PAQ), Beck's anxiety inventory (BAI), and Trate anxiety inventory. Results : Sixteen out of 55 case(29.1%) experienced panic attacks. The group who experienced the panic attack got significantly higher score in Berk's anxiety inventory and trate anxiety inventory than the group who didn't. But considering the result of pulmonary function test there was no meaningful relationship between the pulmonary function and the panic attack. And it was the same in the Beck's anxiety inventory and trate anxiety inventory. Conclusion : The patents who were referred to pulmonary function test were more likely to suffer the panic attack. But few received the proper treatment. The panic attack had relation with the anxiety sensitivity, but no relation with the pulmonary function.
불소이온도입법에 의한 불소도포가 교정용 브라켓인접 치면의 재석회화에 미치는 영향
정선경 慶北大學校 齒科大學 1997 慶北齒大論文集 Vol.14 No.-
여러 가지 불소 이용법중 환자의 규칙적인 협조가 필요하지 않는 불소이온 도입법에 의한 불소도포를 시행하여 산부식처리된 교정용 브라켓 인접 치면의 재석회화를 유도, 탈회를 방지함으로써 전문가 불소도포에 의한 교정용 브라켓 인접치면의 치아우식증 예방효과를 보고자 교정치료를 위해 발치해야 할 소구치에 2.0% NaF를 이용하여 불소이온 도입법으로 불소도포를 한후 4주뒤 발치하여 법랑질시편을 만들어 법랑질 표면 미세경도를 측정하여 다음과 같은 결과를 얻었다. 불소도포를 하지않은 대조군에 비해 불소도포 1회, 2회군 모두에서 법랑질 표면 미세경도가 증가하였다. 브라켓 기저면에 가까울수록 법랑질 표면 미세경도가 더 작게 나타났다. 불소도포 1회군보다는 2회군에서 법랑질 표면 미세경도의 증가가 더 크게 나타났으나 통계적 유의성은 보이지 않았다. 이상에서 본 실험에 사용한 방법과 같은 불소이온도입법을 이용하여 주시적인 불소도포를 시행하면 교정장치 장착으로 인한 법랑질 탈회 및 치아우식증을 상당히 예방할 수 있을 것으로 기대된다.
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.