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Son, Ho Young,Kang, Joon Ki,Bahk, Yong Whee,Kwon, Hyoung Chul,Yoon, Sei Chul,Oh, Yoon Kyeong,Song, Jin Un CATHOLIC MEDICAL CENTER 1985 Bulletin of the Clinical Research Institute Vol.13 No.1
Twenty-four cases of pituitary adenoma, 13 males and 11 females with the age ranging from 11 to 65 years, received radiation therapy (RT) on the pituitary area with a 6 MV linear accelerator during past 25 months at the Division of Radiation Therapy, Kang-Nam St. Mary's Hospital, Catholic Medical College. Of 24 cases of RT, 20 were postoperative and 4 primary. To evaluate the effect of RT, we analyzed the alteration of the endocrinologic tests (prolactin, growth homme), neurologic abnormalities, major clinical symptoms, endocrinologic changes and improvement in visual problems after RT.
한국형 틸팅열차 운행 중 운전 모드에 따른 고조파 분석 및 평가에 관한 연구
강철(Chul Kang),임재찬(Jae-Chan Lim),허재선(Jae-Sun Huh),김재철(Jae-Chul Kim),이수길(Su-Gil Lee),한성호(Soung-Ho Han) 대한전기학회 2009 전기학회논문지 P Vol.58 No.4
Recently, the new Korean Tilting Train Express(TTX) which maintains a speed on the curve railway line is developed. Electric railways, including the TTX, have electrical problems that could bring about serious accidents. For such reasons, the electric railway's electrical problems, electrical harmonic and others, have been studied briskly. Thus, TTX's electrical problems also need leading studies because the new Korean TTX will operate earnestly in 2012. The results could be used hereafter diagnosis of it's components and train conditions. In the paper, electrical signals in TTX operation were measured to analyze electrical harmonic. In addition, after the electrical signals were measured to operating mode (coasting mode, acceleration mode and regenerative breaking mode) respectively in test section(Ho-nam line, Chung-buk line, Jung-ang line and Tae-baek line). The electrical harmonics considered operating modes triparted were analysed and evaluated.
장세진,고상백,강동묵,김성아,강명근,이철갑,정진주,조정진,손미아,채창호,김정원,김정일,김형수,노상철,박재범,우종민,김수영,김정연,하미나,박정선,이경용,김형렬,공정옥,김인아,김정수,박준호,현숙정,손동국 大韓産業醫學會 2005 대한직업환경의학회지 Vol.17 No.4
Background and Purposes: Over the past three decades, numerous studies performed in Korea have reported that job stress is a determinant risk factor for chronic diseases and work disability. Every society has its own culture and occupational climate particular to their organizations, and hence experiences different occupational stress. An occupational stress measurement tool therefore needs to be developed to estimate it objectively. The purpose of this study is to develop and standardize the Korean Occupational Stress Scale (KOSS) which is considered to be unique and specific occupational stressors in Korean employees. Subjects and Methods: Data were obtained from the National Study for Development and Standardization of Occupational Stress (NSDSOS Project: 2002-2004). A total of 12,631 employees from a nationwide sample proportional to the Korean Standard Industrial Classification and the Korean Standard Occupational Classification were administered. The KOSS was developed for 2 years (2002-2004). In the first year, we collected 255 items from the most popular job stress measurement tools such as JCQ, ERI, NIOSH and OSI, and 44 items derived from the a qualitative study (depth interview). Forty-three items of KOSS, in the second year, were retained for use in the final version of the KOSS by using Delphi and factor analysis. Items were scored using conventional 1-2-3-4 Likert scores for the response categories. Results: We developed eight subscales by using factor analysis and validation process: physical environment (3 items), job demand (8 items), insufficient job control (5 items), interpersonal conflict (4 items), job insecurity (6 items), organizational system (7 items), lack of reward (6 items), and occupational climate (4 items). Together they explained 50.0% of total variance. Internal consistency alpha scores were ranged from 0.51 to 0.82. Twenty-four items of the short form of the KOSS (KOSS-SF) were also developed to estimate job stress in the work setting. Because the levels of the subscales of occupational stress were gender dependent, gender-specific standard norms for both the 43-item full version and the 24-item short form using a quartile for the subscales of KOSS were presented. Conclusion: The results of this study suggest that KOSS might be an appropriate measurement scale to estimate occupational stress of Korean employees. Further and more detailed study needs to be conducted to improve the validity of this scale.
Effects of Herbal Extracts Used in Oriental Medicines on Heme Oxygenase-1 Expression
Jeong, Gil-Saeng,Oh, Seung-Hwan,Kang, Dae-Gill,Lee, Ho-Sub,Kim, Youn-Chul The Physiological Society of Korean Medicine and T 2006 동의생리병리학회지 Vol.20 No.5
Effects of twenty-three aqueous herbal extracts used in oriental medicines on heme oxygenase (HO)-1 expression were estimated in a mouse hippocampal cell line, HT22. HO-1 is one of the cytoprotective enzymes activated various stimuli, and Western blot analysis was used for evaluated HO-1 expression. Six aqueous extracts such as Rhei Rhizoma, Paeoniae Radix, Uncariae Ramulus et Uncus, Theae Folium, Prunellae Spica, and Coptidis Rhizoma significantly increased HO-1 expression in HT22 cells at the concentration of 300 ${\mu}$g/ml. In Addition, four aqueous extracts including Eucommiae Cortex, Moutan Cortex Radicis, Ginseng Radix Rubra, and Scutellariae Radix moderately increased HO-1 expression. These results would be usefulfor the isolation and identification of their neuroprotective principles.
Li, Bin,Lee, Dong-Sung,Choi, Hyun-Gyu,Kim, Kyoung-Su,Kang, Dae-Gil,Lee, Ho-Sub,Jeong, Gil-Saeng,Kim, Youn-Chul Pharmaceutical Society of Japan 2011 BIOLOGICAL & PHARMACEUTICAL BULLETIN Vol.34 No.10
<P>Sauchinone, a biologically active lignan isolated from the roots of <I>Saururus chinensis</I> (L<SMALL>OUR</SMALL>.) B<SMALL>AILL</SMALL>. (Saururaceae), is reported to exert a variety of biological activities, such as hepatoprotective, anti-inflammatory actions and inhibitory effects on bone resorption. In this study, we investigated the effect of sauchinone in suppressing cyclooxygenase-2 (COX-2) and inducible nitric oxide synthase (iNOS) expression, leading to a reduction in COX-2-derived prostaglandin E<SUB>2</SUB> (PGE<SUB>2</SUB>) and iNOS-derived nitric oxide (NO) production in lipopolysaccharide (LPS) stimulated RAW264.7 macrophages. Present study also demonstrates the effects of sauchinone in inducing heme oxygenase-1 (HO-1) expression and an increase in heme oxygenase (HO) activity in RAW264.7 macrophages. The effects of sauchinone on LPS-induced PGE<SUB>2</SUB>, NO, tumor necrosis factor-α (TNF-α) and interlukine-1β (IL-1β) production were partially reversed by the HO-1 inhibitor Tin protoporphyrin was also seen in this study. In addition, we found that treatment with extracellular signal-regulated kinase (ERK) inhibitor (PD98059) reduced sauchinone-induced HO-1 expression. Sauchinone also increased ERK phosphorylation. These results suggest that sauchinone inhibits pro-inflammatory mediators through expression of anti-inflammatory HO-1 <I>via</I> ERK pathway.</P>
신경회로망을 이용한 송전선로 고장거리 추정에 관한 연구
강승호,이병길,김철환 成均館大學校 科學技術硏究所 2000 論文集 Vol.51 No.1
When faults occur in transmission lines, protective relays need to operate fast and accurately to protect transmission lines and electrical equipments and to supply power with good quality. To advance the reliability of power network, the accurate fault detection and fault distance estimation must be implemented. This paper proposes the fault distance estimation method using artificial neural networks. In this paper, fault distance estimation is performed using fundamental component of 3-phase voltages and currents. To evaluate the performance of the technique using artificial neural network, the propriety of fault distance estimation is verified using EMTP(Electromagnetic Transient Program).
姜鎬哲,박명안 진주산업대학교 1999 산업과학기술연구소보 Vol.- No.6
This stud was carried out to compare with the morphological characteristics of the several cultivars in the C. pinnatifida. ‘Daekumsung’introduced from China is thornless cultivar and its fruit diameter is larger than 3 cm. Its fruit size was 3 times as large as general C. pinnatifida cultivars grown in Korea. Flower size of ‘Daekumsung’was 1.5 times as large as other cultivars and inflorescence length also was longer than others. And its shoot growth was stonger than any other cultivars. Other thornless strains were collected at Chuncheon, Kangwon and Suwon, kyeonggi and they were named as ‘No. 5’and ‘No. 6’, respectively. Another strain named as ‘No. 4’was collected Chungson, Kangwon. The strain have unigue feature, in that tree is dwarf, about 1m high and internode length is much shorter than other cultivars. Characteristics of leaf flower, and fruit were not different from those of other cultivars. Early matured strains, ‘No. 2’and‘No. 3’also were selected. Their fruits were colorized in July 24 and August 5, 12∼20 days earlier than August 26 of other cultivars. Therefore, they were very promise landscape materials, having red fruits in Summer season.
자연습지의 구조적 특성과 갈대 (Phramites japonica)의 적정생육수심
강호철,류남형 진주산업대학교 건설기술연구소 1998 건설기술연구소보 Vol.1 No.-
This study was carried out focused on two subjects. The first part investgated the structural characteristics of 12 natural wetlands, actual vegetation map. The second part deal with fitted depth zones of Phramites japonica in natural wetlands. The results of this study are as follows; First. The environmental conditions of investigated natural wetlands showed wide variation from site to site. Total plant species collected were 19 families and 35 species. Second. The fitted depth zones of Pharamites Japonica is about 0-30㎝.
강승호,이병길,김철환 成均館大學校 科學技術硏究所 2000 論文集 Vol.51 No.1
High impedance fault(HIF) is defined as the fault that cannot be detected or removed by conventional overcurrent relays(OCRs). When HIF occurs in residential areas, energized high voltage conductor results in fire hazards and causes damages in electrical equipments or personal threat. This paper proposes the fault classification of not only LIFs but also HIFs using artificial neural networks. In this paper, classification of faults in transmission line is performed using the instantaneous 3-phase currents. Test results show that the neural networks were able to classify the faults including HIF accurately in transmission lines within a half cycle.
높은 입체선택성을 나타내는 고리카보네이트의 친핵성 치환반응과 광학활성인 β-Hydroxy Ester의 합성
강석구,박동철,노호식,윤승현,홍덕표 성균관대학교 기초과학연구소 1995 論文集 Vol.46 No.1
The nucleophilic ring opening of the cyclic carbonates of optically active threo-2,3-dihydroxy esters afforded α-substituted β-hydroxy esters with highly regio- and stereoselectivity under mild conditions. The α-substituted β-hydroxy esters were transformed to β-hydroxy esters