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      • KARYOTYPES OF SIXTEEN SPECIES OF GOBIID FISHES FROM KOREA

        YUN,,MYEONG-JA,LEE,,GEUM-YEONG,JANG,,SEON-IL,SO,,JUNE-NO 全北大學校 基礎科學硏究所 1987 基礎科學 Vol.10 No.1

        A karyological analysis was carried out on different Korean species of the family Gobiidae (10 genera, 3 subfamies). The preparations were made according to the flame drying method, and the karyotypes were analyzed by conventional Giemsa staining. Diploid chromosome number ranged between 40 and 50 (Acanthogobius hasta, 44;A. sp., 42;A. lactipes, 40;A. flavimanus, 44;Acentrogobius pflaumi, 50; Rhinogobius brunneus, 44; Chasmichthys dolichognathus, 44; C. gulosus, 44; Chaenogobius abei, 46; Favonigobius gymnauchen, 48; Odontobutis platycephala, 44; Tridentiger obscurus, 44; T. sp., 44), and arm number was in the range of 40-96. Some detected chromosomal characteristics permitted establishing some karyotypic relationships among the different species investigated.

      • KCI등재후보

        Multiple chemical sensitivity caused by exposure to ignition coal fumes

        Myeong-Ja,Yun,Dong-Mug,Kang,Kyoung-Hye,Lee,Young-Ki,Kim,Jong-Eun,Kim 대한직업환경의학회 2013 대한직업환경의학회지 Vol.25 No.4

        Background: Although multiple chemical sensitivity (MCS) is a well-known disorder caused by environmental exposures, MCS caused by occupational exposure has been reported in Korea. Therefore, we report a MCS case caused by environmental exposure to ignition coal after a differential diagnosis to exclude other diseases. Case report: Since 2011, a 55-year-old woman had experienced edema, myalgia, and other symptoms when she smelled ignition coal near her workplace. She had been diagnosed with fibromyalgia syndrome(FMS) and was treated, with no improvement of symptoms. Since then, she showed the same symptoms after exposure to city gas, the smell of burning, and exhaust gas. To avoid triggering substances, she moved to a new house and used an air purifier. She quit her job in November 2012. After visiting our hospital, she underwent a differential diagnosis for FMS, chronic fatigue syndrome, and somatization disorder. She was diagnosed with MCS by the Korean version of the Quick Environment Exposure Sensitivity Inventory (QEESI). She was educated about the disease and to avoid triggering substances. She received ongoing treatment for her symptoms. Conclusion: This case showed that symptoms began after smelling ignition coal. After that, her triggers was increased such as the smell of city gas, burning, and exhaust gas. This case is the first reported in Korea of MCS due to environmental exposure after ruling out other diseases.

      • Effect of teflubenzuron (chitin synthesis inhibitor) on biological trait of Paranura rosea (Collembola)

        Yun-Sik,Lee,Jino,Son,Yongeun,Kim,Myeong,seob,Kim,Kijong,Cho 한국응용곤충학회 2011 한국응용곤충학회 학술대회논문집 Vol.2011 No.05

        The use of insect growth regulators (IGRs) has been gaining popularity as an environmentally friendly option to improve existing integrated pest management (IPM) strategies. Although IGRs have a selective effect on target organisms, they may exert a more selective effect on non-target organisms. In this study, the toxic effects of teflubenzuron on biological traits of P. rosea, Collembola, were assessed in the OECD artificial soil under two different exposure conditions, one was exposed in the bulk soil, and the other was exposed in the compacted soil which unidirectional force was applied to the soil surface. After 28 days of exposure, the toxicity of teflubenzuron on the survival and juvenile production of P. rosea in the bulk system was more toxic than that of the compact system. Moreover, not only the egg production but also the hatching rate and molting frequency of P. roseas was decreased in a concentration dependent manner. These results suggest that the IGRs teflubenzuron exhibit significant impacts on the biological traits of non-target organisms P. rosea and its toxic effects are differently assessed depending on the exposure conditions.

      • SCOPUS

        A Study on Prevalence and Risk Factors for Varicose Veins in Nurses at a University Hospital

        Yun,,Myeong-Ja,Kim,,Young-Ki,Kang,,Dong-Mug,Kim,,Jong-Eun,Ha,,Won-Choon,Jung,,Kap-yeol,Choi,,Hyun-Woo Occupational Safety and Health Research Institute 2018 Safety and health at work Vol.9 No.1

        Background: Lower-limb varicose veins (VVs) are common and known to have a higher prevalence among people who work in occupations requiring prolonged standing. In the Republic of Korea, however, VV-related occupational factors have seldom been examined. This study was conducted to assess the prevalence of VVs among nurses, an occupational group considered to be at high risk of VVs, and determine the occupational risk factors of prolonged standing. Methods: Between March and August 2014, a questionnaire survey coupled with Doppler ultrasonography was conducted on the nurses working at a university hospital. Results: A total of 414 nurses participated in the survey and diagnostic testing. From the survey analysis and test results, the prevalence of VVs in nurses was estimated to be 16.18%. Significant factors for venous reflux were age [odds ratio (OR) = 1.06, 95% confidence interval (CI) = 1.03-1.10], pregnancy (OR = 2.15, 95% CI = 1.17-3.94), and delivery (OR = 2.02, 95% CI = 1.08-3.78). The statistical significance of these factors was verified after risk adjustment for sociodemographic factors (OR = 3.40, 95% CI = 1.27-9.09). Conclusion: Factors significantly associated with venous reflux were increasing age and prolonged working hours (${\geq}4hours$) in a standing position (OR = 2.80, 95% CI = 1.08-7.25), even after risk adjustment for sociodemographic factors. This study is significant in that an objective diagnosis of VVs preceded the analysis of the risk factors for VV incidence, thus verifying objectively that VVs are associated with occupations requiring prolonged hours of working in a standing position.

      • KCI등재
      • PE-153: The Application of the Fatty Liver Inhibition of Progression (FLIP) Algorithm and Steatosis, Activity, and Fibrosis (SAF) Score in Korean Patients with Nonalcoholic Fatty Liver Disease

        ( Myeong Su Chu ), ( Hyeon Jeong Yun ), ( Myeong Jun Song ), ( Seung Won Jung ), ( Young Seok Kim ), ( Si Hyun Bae ), ( Jong Young Choi ), ( Sang Wook Choi ), ( Seung Kew Yoon ) 대한간학회 2016 춘·추계 학술대회 (KASL) Vol.2016 No.1

        Aims: Biopsy is still the gold standard for the diagnosis of nonalcoholic steatohepatitis (NASH) but the definition may vary in evaluation of biopsies for clinical trials. Recently, a scoring system (steatosis, activity, fibrosis[SAF]) allowing the use of an algorithm (fatty liver inhibition of progression [FLIP]) reported for the classification of liver injury in morbid obesity. We evaluated the application of SAF score and FLIP algorithm in Korean patients with nonalcoholic fatty liver disease (NAFLD). Methods: We analyzed the 126 patients with biopsy-proven NAFLD in 5 centers in Korea from Aug, 2008 to April, 2016. Results: In total study populations, 56 patients (44.4 %) were diagnosed to NASH, 70 (55.6%) as NAFLD including 60 patients of a gray zone (NAS 3-4) according to NAS scoring system. Based FLIP algorithms, 72 patients (57.1 %) were categorized as NASH, 54 (42.9 %) as NAFLD. 21 patients (35%) in gray zone (NAS 3-4) and 5 patients (NAS ≥5) were categorized as NASH and steatosis, respectively. The activity score (ballooning+ lobular inflammation) enabled discriminating NASH. All patients with NASH had A ≥3, whereas 3 patients (5.2%) with A2 had NASH. Especially, the presence of ballooning in activity score was the significant factor to discriminate NASH and steatosis. This activity score was also closely correlated with both alanine aminotransferase (ALT) and aspartate aminotransferase (AST) and Fragmented cytokeratin-18, respectively (P=0.000, 0.023, 0.006 respectively). Fibrosis grade by SAF score was significantly correlated with NAFLD fibrosis score and fibroscan (P=0.026, 0.000, respectively). Conclusions: The FLIP algorithm and SAF score system in the NAFLD may provide the favorable tools in Korean patients. Among the SAF score, the ballooning of hepatocyte may be an important factor to discriminate NASH and NAFLD, although it is one of the major limitations of liver biopsy.

      • KCI등재

        상위관리직에서의 여성의 지위

        윤명수 ( Myeong Su Yun ), 김정우 ( Jung Woo Kim ), 김기민 ( Ki Min Kim ) 한국여성경제학회 2012 여성경제연구 Vol.9 No.1

        본 논문은 상위관리직에 진출한 여성의 비율변화를 살펴봄으로써 한국의 상위직 노동시장에 유리천장이 존재하는지를 검증해보고자 하였다. 이를 위해 사업체패널조사(2005년∼2009년)의 3개년도 자료 중 모든 연도에 응답한 사업체로 구성된 균형패널자료를 구축하여, Chamberlain 임의효과 패널프라빗 모형과 패널 고정효과 모형으로 분석하였다. 우선, 기술통계량을 보면 여성노동자의 종사비율에 비해 상위관리직으로의 진출비중이 매우 미약한 것으로 나타났다. 계량모형으로 분석한 결과, 여성이 많이 종사하는 업종의 대규모 사업장에서 여성상위직 배출확률이 다소 높아지는 것으로 나타났고, 일부 경우에는 적극적 고용개선조치가 여성의 상위관리직 진출을 용이하게 하고 있지만, 큰 영향을 미치고 있지는 않은 것으로 나타났다. This paper examines whether there is a glass ceiling in Korea by studying share of women in managerial jobs using a balanced panel constructed from three waves of Workplace Panel Survey, 2005-2009. The balanced panel shows that the penetration of women in high paying managerial labor market is very limited. Econometric models such as Chamberlin`s random effects probit model and panel fixed effects model indicate that occupations with higher female representation contribute to more share of female managers; affirmative action programs may open door to women in managerial jobs, but do not significantly raise the share of women in mangerial labor market.

      • 전동차 제동장치제어기 국산화 개발을 위한 실용화 방안 연구

        고윤권(Yun- gwon Ko), 김영규(Young-kyu kim), 김주태(Ju-tae kim), 이상오(Sang-o Lee), 배명곤(Myeong-gon Bae), 윤태영(Tea-young yun) 한국철도학회 2016 한국철도학회 학술발표대회논문집 Vol.2016 No.10

        전동차에서 제동장치는 안전운행을 위하여 무엇보다도 우선되어야 할 중요한 장치이다. 서울메트로 1, 4호선에서 운용중인 현대 VVVF 전동차 제동장치제어기는 국외기술로 제작된 제품으로 12장의 PCB Panel로 구성되어 있으며 각종 제동장치와 인터페이스가 이루어지고 있다. 최근 장기사용에 따른 부품 노후화와 Connector 접속불량 및 외자부품 단종 등으로 유지보수에 많은 어려움을 겪고 있다. 본 논문에서는 국내 전동차 제작기술을 바탕으로 최신 전자식 제어방식이 적용된 국산화 제품을 연구개발하고 현재의 문제점 및 성능개선을 위한 실용화 방안 연구를 제시하고자 한다. Brake system is the most important component of electric rail car for safe operation. The Brake Controller of VVVF electric rail car of Hyundai, operating in line No. 1 and 4, is an analog control product manufactured with abroad technique. It is composed of 12 pieces of PCB panels and forms interface with various brake systems. Recently, there are difficulties in maintenance due to component deterioration, contact failure of connector, and suspension of abroad components. This paper will research and develop domestic product applied with electronic control system from existing analog control system, and study practical use method through final user validation and applicability to existing rolling stock.

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