크롬 취급 사업장의 작업환경 및 근로자 폭로 실태에 관한 연구

유병철,손병철,전진호,손혜숙,한용수,이채언,정운,Yu, Byung-Chul,Son, Byung-Chul,Jun, Jin-Ho,Han, Yong-Soo,Son, Hye-Sook,Lee, Chae-Eun,Jeong, Woon 대한예방의학회 1994 예방의학회지 Vol.27 No.3

For the purpose of providing the basic data for health management of workers who are exposed to chromium and for improving the quality of working environment, the authors evaluated blood and urinary level of chromium, the occupational history. AST, ALT, Hb, Hct, nasal specular examinaton on 287 workers who have been dealed chromium compounds in 56 manufacturing Industries of five types, that is, 38 metal plating services(plating),4 manufacture of other fabricated metal products (fabricated metal product), 5 manufacturing of dyestuff(dyestuff), 6 dressing and dyeing of leather(leather), 3 others(manufacture of pottery and ceramic househod wares, motor vehicles, electronic valves and tubes and other electronic components) and also measured the level of chromium in air from February to October 1993. The results were as follows ; 1. The utilized type of chromium compounds was the hexavalent state in plating fabricated metal product dyestuff, leather and the trivalent state in .other, and atmosperic chromium concentration as geometric mean was $0.0138mg/m^3(0.001{\sim}0.068mg/m^3)$ in plating, $0.0115mg/m^3(0.006{\sim}0.015mg/m^3)$ in fabricated matal product, $0.068mg/m^3(0.002{\sim}0.019mg/m^3)$ in dyestuff, $0.0083mg/m^3(0.002{\sim}0.028mg/m^3)$ in leather $0.0039mg/m^3(0.003{\sim}0.005mg/m^3)$ in other by the type of industry and it exceeded TLV-TWA ($0.05mg/m^3$) in five (13.6%) of plating services. 2. The geometric mean of chromium in blood was $1.54{\mu}g/dl(0.10{\sim}3.62{\mu}g/dl)$ in Plantng, $0.94{\mu}g/dl(0.27{\sim}2.82{\mu}g/dl)$ in fabricated metal product, $0.51{\mu}g/dl(0.10{\sim}3.25{\mu}g/dl)$ in dyestuff, $0.87{\mu}g/dl(0.15{\sim}8.00{\mu}g/dl)$ in leather, $0.55{\mu}g/dl(0.20{\sim}2.28{\mu}g/dl)$ in other by the type of industry(p<0.001). 3. The geometric mean of chromium in urine was $14.47{\mu}g/l(6.90{\sim}28.00{\mu}g/l)$ in planting, $4.63{\mu}g/l(0.24{\sim}43.00{\mu}g/l)$ in fabricated metal product, $5.93{\mu}g/l(1.00{\sim}33.00{\mu}g/l)$ in dyestuff, $11.09{\mu}g/l(0.80{\sim}48.00{\mu}g/l)$ in leather, $12.41{\mu}g/l(10.10{\sim}41.00{\mu}g/l)$ in other by the type of industry(p<0.001). 4. As the result of nasal specular examination, twenty four cases (8.4%) of nasal septal perforation among 287 total subjects was observed, and there were 17 (9.7%) cases in plating, 4 csaes (14.3%) in dressing and dyeing of leather. In the comparison of chromium concentration in blood and urine between the perforated group and non-perforated group, the perforated group showed a significantly higher value as $1.883{\pm}3.055{\mu}g/dl\;and\;0.793{\pm}0.815{\mu}g/dl$(P<0.001), $21.31{\pm}34.610{\mu}g/L\;and\;9.304{\pm}11.079{\mu}g/L$ (P<0.001). 5. The mean concentration of chromium in blood, urine and the mean level of AST, ALT, Hb and Hct in exposure group were higher than those of control group(p<0.001).

둔상성 중증 외상환자에서 내원 초기에 시행한동맥혈 염기결핍과 예후의 관계

유병철 ( Byung Chul Yu ),정민 ( Min Chung ),이길재 ( Gil Jae Lee ),이정남 ( Jung Nan Lee ) 대한외상학회 2013 大韓外傷學會誌 Vol.26 No.1

Purpose: The base deficit (BD) at admission in severely injured patients has been shown to predict the adequacy of resuscitation and outcome, but this relationship is not well established in the Korean experience. The purpose of this study was to define the association between arterial blood gas (ABG) values and the mortality for patients with severe blunt trauma at a developing trauma center in Korea. Methods: A retrospective review of 415 adult patients with severe blunt trauma was conducted using electronic medical records from Jan. 2010 to Dec. 2011. Results: A total of 256 patients had ABG drawn within 1 hour of arrival. Patients who expired displayed a higher lactate level (4.86 vs. 3.31, p<0.0001), a worse BD (-7.99 vs. -5.37, p=0.001), and a lower pH (7.31 vs. 7.34, p=0.011) at arrival compared with those who survived. A statistically significant association was also observed between BD and blood product usage (p=0.001). Conclusion: The base deficit at admission is a useful marker of mortality and outcome in severely injured patients with blunt trauma in Korea.

자본조달형태와 투자의사 결정: 패널문턱모형에 의한 분석

유병철 ( Byung Chul Yu ),최두렬 ( Doo Yull Choi ),박승록 ( Seung Rok Park ) 한국국제경제학회 2005 국제경제연구 Vol.11 No.3

외상성 복벽 탈장 환자에서 biologic mesh를 이용한 치료

유병철 ( Byung Chul Yu ),정민 ( Min Chung ) 대한외상학회 2012 大韓外傷學會誌 Vol.25 No.2

Resection of the bowel is necessary for the repair of a ventral hernia after recovery from trauma in some cases. In such instances, polyester or polypropylene meshcannot be used due to the possibility of infection; we had to use biological mesh instead. We report a case in which a traumatic hernia was repaired with Permacol (Covidien, Norwalk, CT, USA). A 42-year-old male patient had been injured by a factory machine seven months prior to admission. At that time, he had abdominal wall injury and small bowel perforation. His abdominal wall had been a defect after operation. A CT scan of the abdomen showed that the left abdominal wall, which is lateral to left rectus abdominis muscle had only one muscle layer, an external oblique muscle, and that a previous abdominal incision had a defect along the entire incision. During the exploration, 10 cm of small bowel was removed due to firm adhesion to the previous surgical scar. Permacol mesh was applied and fixed with transfascial fixations and tacks by using the intraperitoneal onlay mesh technique. There were no complications after the surgery and the patient was discharged without any problems. (J Korean Soc Traumatol 2012;25:63-66)

일개 권역외상 센터의 외상등록체계(KTDB) 입력 대상 분석

유병철 ( Byung Chul Yu ),정민 ( Min Chung ),이길재 ( Giljae Lee ),이민아 ( Min A Lee ),박재정 ( Jae Jeong Park ),최강국 ( Kang Kook Choi ),현성렬 ( Sung Yeol Hyun ),전양빈 ( Yang Bin Jeon ),마대성 ( Dae Sung Ma ),윤용철 ( Young C 대한외상학회 2015 大韓外傷學會誌 Vol.28 No.3

Purpose: Establishment of the trauma system changed quality of trauma care in many countries. As one of the first designated level 1 trauma center in Korea, we analyzed trauma registration data in 2014. Methods: Data was extracted from Korean Trauma Data Base (KTDB) that was started from august 2013. Variables related to demographics and trauma was collected through the year 2014. Results: There were 3269 trauma patients who admitted to our hospital and registered to KTDB in 2014. Median age was 49 years, 64.4% were men, and 90% of patients were blunt in mechanism. Median injury severity score (ISS) was 5, mean revised trauma score (RTS) was 7.65. There were 138 (4.2%) deaths and 87 (2.7%) patients of them was death after admission. Conclusion: This is the first report using KTDB registration from our institution. Trauma volume is appropriate but it should be compared with other trauma centers in Korea. In future national analysis of KTDB is mandatory. [ J Trauma Inj 2015; 28: 123-128 ]

VAR 모형을 이용한 부산항과 상해항의 물동량 분석

유병철 ( Byung Chul Yu ),조찬혁 ( Chan Hyouk Cho ) 한국물류학회 2008 물류학회지 Vol.18 No.3

우리나라 수출입 및 석유 · 화학 · 고무 산업 비대칭 환율전가 분석

유병철(Byung-Chul Yu),오지영(Ji-Young Oh) 한국무역연구원 2012 무역연구 Vol.8 No.1

As the international transaction and the openness in world market are expanded, trade among the nations gets more brisk. In addition, the volatility in exchange rate is changing unpredictably as liberalization is speeding up. This study adopts asymmetric ARDL-Model in analyzing the effect that exchange rate have on export and import price as well as petroleum product and rubber goods. In long and short term asymmetric model of petroleum product and rubber goods, we can see cointegrating relations at the 1% significance level. Also, the volatility in exchange rate weren't the same, for both long and short term have got the asymmetry wald test This study has significances of practical analysis on asymmetrical change of foreign exchange expense assignment in import/export price of Petroleum, Chemical, Rubber industry by ARDL model and proposes a conclusion of difference which is caused by price strategies of asymmetrical products.

환율변동에 따른 우리나라의 장,단기 비대칭 해외관광수요 분석

유병철 ( Byung Chul Yu ),오지영 ( Ji Young Oh ) 서강대학교 시장경제연구소(구 서강대학교 경제연구소) 2011 시장경제연구 Vol.40 No.2

본 연구는 환율이 장·단기적으로 우리나라 아웃바운드 및 인바운드 관광수요에 어떠한 영향을 미치는가를 분석함에 있어서 장기 및 단기 비대칭성을 고려할 수 있는 비대칭 ARDL모형을 이용하였다. 분석결과, 우리나라 실질실효환율의 내국인 출국수요에 대한 영향력은 공적분 관계를 확인할 수 있었으며, 장기비대칭을 가정한 ARDL모형(장기 비대칭·단기 선형 모형, 장·단기 비대칭 모형)으로 분석 한 결과, 모두 장기 비대칭이 나타났으며, 단기 비대칭에서도 유의한 결과가 나타났다. 장기계수 추정결과환율 상승에 따른 내국인 출국자 수의 감소규모가 하락 시 증가폭 보다 크게 나타나 우리나라 해외 출국자는 환율인상에 더욱 크게 반응하는 것으로 나타났다. 반면 외래객의 입국에 관한 영향력 분석 결과 역시 유의한 공적분 결과가 나타났으며, 장기비대칭을 가정한 ARDL모형에서 장기 비대칭이 있는 것으로 나타났으나, 단기적으로는 유의하지 않은 결과가 나타났다. 또한 환율 상승에 따른 외래객 입국의 증가세가 환율 하락에 따른 감소세 보다 크게 나타나고 있어 외래객 역시 환율 인상에 더욱 민감하게 반응하는 것으로 보인다. The main purpose of this paper is to examine the short-run and long-run asymmetric effect of exchange rate on the inbound and outbound tourists in Korea using the non-linear ARDL Model. We find the cointegrating relations between variable on non-linear ARDL model. This paper finds asymmetries in the response of outbound and inbound tourists to exchange rate changes and long run coefficient is the greater when the won has depreciated than the won has appreciated. The analysis results show that outbound and inbound tourists respond more sensitive to increase in the exchange rate than decrease in the exchange rate.

문턱모형(模型)을 활용(活用) 지역별(地域別) 실업율(失業率) 시계열(時系列) 자료(資料)의 특성(特性)

유병철 ( Byung Chul Yu ),박성익 ( Sung Ik Park ),이준수 ( Jun Soo Lee ) 한국국제경제학회 2009 국제경제연구 Vol.15 No.3

유료노인전문요양원 입주의사 결정요인에 관한 연구

유영순,조은희,유병철,정귀원,엄상화,김성준,전진호,Yoo, Young-Soon,Cho, Eun-Hi,Yu, Byung-Chul,Jeong, Ki-Won,Urm, Sang-Hwa,Kim, Sung-Jun,Chun, Jin-Ho 대한예방의학회 2001 예방의학회지 Vol.34 No.1

Objectives : To gather information about the factors which influence the interest and intention of admission into charging nursing hones for the elderly(CNH), as these homes represent an important method for resolving the problems related to the rapid population aging occurring in Korea. Methods : A face-to-face interview survey was carried out with 320(men 159, women 165) patients over 60 years old who were admitted at 2 university hospitals and 5 general hospitals in the Busan area between December 1998 and March 1999. Data were analyzed through t-test, ANOVA, correlation and multiple regression analysis. Results : The mean age and years of education of the study population was 67.0 and 7.7 years, and the types of chronic degenerative disease included musculoskeletal disorders(20.1%), cerebrovascular disease(17.1%), and diabetes(14.3%). The major forms of household living arrangement prior to admission were elderly alone(22.6%), and elderly couple(33.5%), while about half of them(55.5%) didn't want to live with their children id the future. Almost half were paying medication fees by themselves(46.6%). The level of actual intention of admission$(3.07{\pm}1.39)$ into a CNH was lower than that of interest$(3.22{\pm}1.33)$(p<0.01). Multiple analysis revealed that the intention of admission increased with decreasing number of future supportive persons$(\beta=-0.107)$, lower level of activity in daily life$(\beta=-0.447)$, and longer years of education$(\beta=-0.447)$ with 32.7% of $R^2$. As for the factors which determined the admission into a CNH, the fee and facilities were considered to be most important, and professional nursing and physician's care were the most desired services. In nomenclature, they preferred 'elderly hospital' or 'elderly health center' to CNH. Conclusions : Interest in CNH is increasing recently, but existing studies about patient experiences in CHN are still limited. This study may form a basis for future examinations of the needs and uses for CNH. Active financial support and public information are considered by the authors to be important factors for the induction of welfare services for the elderly, though CNH.