중소규모 사업장 근로자의 직무스트레스로 인한 결근, 조퇴 현황과 한국형직무스트레스 하부요인과의 관련성

김정훈,박신구,김동현,김환철,임종한,이의철,이동훈,이지영 大韓産業醫學會 2009 대한직업환경의학회지 Vol.21 No.2

목적: 중소규모 사업장 근로자들의 직무 스트레스로 인한 결근, 조퇴의 현황과 한국형 직무 스트레스 하부 요인과의 관련성을 알아보고자 하였다. 방법: 중소규모 사업장 83곳 근로자들에 대해 한국형 직무스트레스요인 평가도구-단축형(KOSS-SF)과 사회 일반적 특성, 직업적 특정 및 직무스트레스로 인한 결근이나 조퇴 경험여부 등을 묻는 구조화된 자가 기입식 설문을 실시하였고, 응답한 4,350명에 대해 최종 분석을 시행하였다. 직무스트레스로 인한 결근, 조퇴와 한국형 직무스트레스 하부 요인들과의 관련성을 확인하기 위하여 로지스틱 회귀분석을 시행 하였다. 결과: 직무 스트레스로 인한 결근, 조퇴를 한 근로자는 남자에서 7%(196명), 여자에서 8%(113명) 로 조사되었고 한국형 직무 스트레스 하부요인과의 관련성에서는 남, 여 모두 직무요구, 관계갈등, 조직체계, 보상부적절, 직장문화 영역의 스트레스가 높은 군에서 통계적으로 의미있게 직무스트레스로 인한 결근, 조퇴율이 증가하였다. 결론: 중소규모 사업장 근로자들의 직무 스트레스로 인한 결근, 조퇴와 한국형 직무 스트레스 하부요인과의 관련성은 남자에서는 조직체계 영역이 가장 높았고, 여자는 직장문화 영역에서 가장 높은 관련성을 보였다. Objective: The aim of this study was to examine the actual conditions of absence and early leave due to job stress of 4,350 workers in 83 small and medium scale industries, and its relationship to job stress factors using Korean Occupational Stress Scale-Short Form (KOSS-SF). Methods: A structured self-reported questionnaire was used to assess each respondent's Sociodemographics, job stress, experience of absence and early leave due to job stress. Seven KOSS-SF domains of job stress were used. We estimated the relation of absence and early leave due to job stress and job stress factors using logistic regression analyses. Results: Absence or early leave due to job stress occurred in 7% of male workers and 8% of female workers. Multiple regression analysis revealed a significantly positive association job stress-related absence/early leave and job demand, interpersonal conflict, organizational system, lack of rewards and occupational climate. Conclusions: Absence and early leave due to job stress is significantly attributed to organizational System and lack of reward for men, and occupational climate and organizational system for women.

Prediction of Retained Austenite Fraction in Quenching-and-Partitioning (Q&P) Steels Using the Gibbs Energy Balance Approach

Seong Hoon Kim,Ji Hoon Kim,Jae Hoon Lee,Dong‑Woo Suh,Jae Sang Lee 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.9

Prediction of retained austenite fraction is quite important in designing advanced high strength steels since retained austeniteis the source of transformation-induced plasticity. The present study investigates the phase constitution of a medium-carbonQ&P steel by comparing various approaches to the transformation stasis of bainitic ferrite and applying them to the partitioningprocess. Among them, the modified GEB approach gave the best agreement with the experimental observation, includingthe effects of heat-treatment condition and chemical composition on phase constitution. This indicates phase transformationduring partitioning can be effectively described by the physics of Gibbs energy balance approach.

여수국가산업단지 인근 지역 대기오염물질 농도에 영향을 미치는 요인분석

김민영,변정훈,이영훈,이건영,한지은,이예림,임지현,장봉기 순천향대학교 기초과학연구소 2022 순천향자연과학연구 논문집 Vol.28 No.1,2

Eight monitoring stations in the Yeosu National Industrial Complex will determine the concentration of air pollutants measured every hour in 2019, analyze what factors affect them, and how they correlate with the air pollutant measurements. Six air pollutants (SO2, NO2, O3, CO, PM-10 and PM-2.5) measured at eight monitoring stations around Yeosu National Industrial Complex (Seogang-dong, Wolnae-dong, Munsu-dong, Yeocheon-dong, Deokchung-dong, Hwayang-myeon, Yulchon-myeon, Samil-dong) the measurement data for each hour of the year were downloaded to analyze the concentration by weather condition, time zone, season, separation distance from Yeosu Industrial Complex, and separation distance from Gwangyang Industrial Complex. SO2, NO2, and CO concentrations were significantly higher in winter, significantly lower in summer, and O3, PM-10, and PM-2.5 concentrations were significantly higher in spring. SO2, CO, PM-10, and PM-2.5 concentrations were significantly higher between 10 a.m. and 12 p.m., NO2 concentrations were significantly higher between 7 a.m. and 9 a.m., and O3 concentrations were significantly higher between 13 p.m. and 15 p.m.(p<0.001). The concentration of air pollutants (SO2, NO2, CO, PM-10, PM-2.5) excluding O3 was found to have a negative (-) correlation with weather condition, and in the case of O3, it was found to have a positive (+) correlation with PM-10, PM-2.5, temperature and wind speed. It was confirmed that the concentration of air pollutants emitted from the Yeosu National Industrial Complex differs depending on the season, time and distance to the industrial complex. This study aims to establish measures to minimize health damage to residents living relatively close to the industrial complex and contribute to the establishment of management and response measures according to the properties of substances to reduce the concentration of air pollutants in the future.

척추 마취에서 소용량 Bupivacaine-Fentanyl 과 상용용량 Bupivacaine 의 비교

조영훈,이상곤,민병우,이지향,반종석 대한마취과학회 2001 Korean Journal of Anesthesiology Vol.41 No.4

Comparison of Small Dose Bupivacaine-Fentanyl with Conventional Dose Bupivacaine during Spinal Anesthesia Young-Hoon Cho, M.D., Ji-Hyang Lee, M.D., Sang-Gon Lee, M.D. Jong-Suk Ban, M.D., and Byung-Woo Min, M.D. Department of Anesthesiology, Daegu Fatima Hospital, Daegu, Korea Background: Although spinal anesthesia has a lot of advantages, it has some disadvantages or undesirable effects. Hypotension and unnecessarily long neural blockade are included among them. Although using small dose local anesthetics fairly solves these problems, it is insufficient to provide reliable surgical anesthesia by itself. Therefore the authors investigated whether such an opioid as fentanyl and small dose local anesthetic used together during spinal anesthesia can prevent hypotension and unnecessarily long neural blockade and provide reliable surgical anesthesia simultaneously. Methods: Thirty patients undergoing knee or below knee surgery were randomized into two groups. Group 1 received bupivacaine 5 mg combined with fentanyl 20 ㎍, and group 2 receive 10 mg bupivacaine. Hypotension was recorded and was treated with intravenous ephedrine. Sensory blockade, intraoperative analgesia, motor blockade and side effects were assessed. Results: NO significant differences were observed in values for assessing hypotension, sensory block-ade or intraoperative analgesia between the two groups. Also no significant differences were observed in intensity of the motor blockade and side effects between the two groups. However the duration of the motor blockade of group 1 was longer significantly than that of group 2. Conclusions: Small dose bupivacaine and fentanyl administered together intrathecally reduced duration of motor blockade and didn't augment of side effects and provided reliable anesthesia for surgery of knee or below knee simultaneously. (Korean J Anesthesiol 2001; 41: 423~427)

Ropivacaine 을 이용한 경막의 마취시 Clonidine 병용의 효과

김종일,조영훈,이상곤,민병우,이지향,반종석 대한마취과학회 2001 Korean Journal of Anesthesiology Vol.41 No.4

Effects of Clonidine Added to Ropivacaine in Epidural Anesthesia Young-Hoon Cho, M.D., Ji-Hyang Lee, M.D., Sang-Gon Lee, M.D., Jong-Il Kim, M.D.^*, Jong-Suk Ban, M.D., and Byung-Woo Min, M.D. Department of Anesthesiology, Daegu Fatima Hospital, Daegu, Korea ^*Kim Jong Il Pain clinic, Daegu, Korea Background: Clonidine has been regarded as an adequate supplementary anesthetic during epidural anesthesia and has been used with local anesthetics such as bupivacaine or lidocaine to support the effects of these anesthetics. The authors would examine whether clonidine is an adequate supplementary anesthetic when it is used with ropivacaine during epidural ane-sthesia. Methods: Thirty-two healthy patients undergoing a hip or lower limb surgery were diveded into two groups. In group 1, 0.5% ropivacaine 15 ml was administered. In group 2, 0.5% ropivacaine 15 ml combined with clonidine 150 ㎍ was administered. Onset, duration and maximal height of sensory block were assessed. Sedation score, blood pressure and heart rate were measured. Results: Duration of sensory block of group 2 was significantly longer than that of group 1. Sedation score of group 2 was significantly higher than that of group 1. Blood pressure of group 2 was sig-nificantly lower thatn that of group 1 at 50 min, 70 min and 90 min after epidural injection. No significant differences were observed in onset of sensory block and heart rate between the two groups. Conclusions: The addition of clonidine to ropivacaine during epidural anesthesia prolonged duration of sensory block and produced useful sedation. It caused relatively stable hemodynamic changes. These results suggest that clonidine is an adequate supplementary anesthetic when it is used with ropivacaine during epidural anesthesia. (Korean J Anesthesiol 2001; 41: 428~433)

서울의 Penicillinase Producing Neisseria Gonorrhoeae 발생빈도(1996)

김재홍,황동규,전재홍,김윤석,김중환,김용준,이창균,임동진,김현수,조창근,김경문,박상훈,전우형,김희성,이호정,차명수,김갑형,김형석,김석우,황지환,박병순,권오상,이민수,송기훈,성소영,이인섭,부태성 대한화학요법학회 1999 대한화학요법학회지 Vol.17 No.2

Background : In recent years, gonorrhea has been panedemic and remains one of the most commom STDs in the world, especially in developing countries. Objective & Methods: For the detection of a more effective therapeutic regimen and assessing the prevalence of PPNG, we have been trying to study the patients who have visited the VD Clinic of Choong-Ku Public Health Center in Seoul since 1980 by means of the chromogenic cephalosporin method. Results: In 1996, 139 strains of N. gonorrhoeae were isolated, among which 53(39.0%) were PPNG. Conclusion: Our results suggests that after a peak of 74.3% in 1993, the prevalence of PPNG in Seoul is gradually declining.

The Safety and Efficacy of Daclatasvir and Asunaprevir with Chronic HCV Genotype 1 Infection and Hemodialysis

( Myeong Jun Song ),( Jung Hyun Kwon ),( Soon Woo Nam ),( Tae Hee Lee ),( Young Woo Kang ),( Ji Woong Jang ),( Seok Hyun Kim ),( Byung Seok Lee5 ),( Sea Hwan Lee ),( Hong Soo Kim ),( Ji Hoon Kim ),( S 대한간학회 2017 춘·추계 학술대회 (KASL) Vol.2017 No.1

Aims: We aimed to evaluate the efficacy and safety of Daclatasvir (DAV) and Asunaprevir (ASV) in patients with chronic hepatitis C virus (HCV) and chronic renal failure (CRF). Methods: 22 chronic hemodialysis patients with HCV infection at 12 medical centers have prospectively enrolled from Feb, 2016 to Feb, 2017 (NCT02580474). Of those, 9 patients who were followed 12 weeks after treatment ended were included. We evaluated the virological responses at each week 4, 12, 24 and the 12-week sustained virologic response (SVR12). The tolerability and safety of patients were also evaluated. Results: Of these 20 patients, there had no resistance-associated variant of NS5A (NS5A RAVs) and 2 patients showed indeterminate NS5A RAVs. 12 patients (54.5%) completed the 24 weeks treatment of DAV and ASV. 6 patients (27.2%) have continued, but 4 patients discontinued study prior to 12 weeks. Overall, all patients (n=9) achieved SVR12. Virologic response at week 4, 12 and 24 showed 94.4% (17/18), 93.3% (14/15), and 100% (12/12) respectively. DCV and ASV were well tolerated among the majority of patients and discontinuation of the treatment due to adverse events (hypertension, bradycardia, leukemia) was occurred in 3 patients. In two patients with indeterminate NS5A RAVs, one achieved SVR12 but the other showed viral breakthrough and discontinued treatment. Conclusions: In this study, DAV and ASV combination therapy for chronic hemodialysis patients with HCV infection achieved high sustained virological response with few adverse events. Close monitoring of safety and tolerability may be necessary when treating chronic hepatitis C patients with CRF receiving DCV and ASV.

석탄 비산재로부터 제올라이트의 합성 및 중금속 흡착능 평가

이창훈,유지호,신형상,정일래 서울産業大學校 2005 논문집 Vol.54 No.3

본 연구에서는 국내 영동화력발전소에서 발생하는 석탄 비산재(coal fly ash)로부터 KOH 용액을 사용한 수열반응을 통하여 제올라이트를 합성하고 중금속 흡착능을 평가하였다. 수열 합성 실험은 일정온도 조건 (100 ℃)에서 알칼리농도([KOH]:1 ~ 4 N), 고액비(S/L: 1/2 ~ 1/20 g/cm³) 및 반응시간 (1 ~ 96 hrs) 등의 합성조건을 달리하여 수행하였다. 그 결과 [KOH] = 3 ~ 4 N, 고액비(S:L) = 1:5 ~ 1:10, 반응시간 48 ~ 96 hr에서 200 ~ 240meq/100g의 CEC 값을 가진 제올라이트 생성물을 얻었다. XRD 분석결과 주요 결정상은 K-Chabazite이었으며 약 40%의 결정도를 보였다. 혼합 중금속(Cu, Cd, Cr, Pb)용액 (개별 중금속 농도 100mg/L, pH 5.0)을 대상으로 한 제올라이트 생성물의 중금속 흡착능르 평가한 결과, 제올라이트 첨가량 3g/200ml 이상에서 모든 중금속에 대하여 95% 이상의 제거율을 보였으며, 타 흡착제(천연제올라이트, 상업용 이온교환수지 등)와의 비교에서도 우수한 흡착능을 보였다.

상악 제2유구치와 상악 제1대구치의 치관 형태: 치아계측학적 연구

김지인,현홍근,김영재,김정욱,장기택,이상훈,한세현,김종철 大韓小兒齒科學會 2011 大韓小兒齒科學會誌 Vol.38 No.4

The basic structure of the primary crowns usually resemble their succeeding permanent teeth. However, maxillary second primary molars resemble ipsilateral first permanent molars. Accordingly in this study, odontometric data of the two teeth was obtained, then analyzed to verify the morphological relationship and sex difference between the two teeth. Dental study casts were examined for their mesiodistal and buccolingual width of the crowns, diameter of each cusps, and intercuspal distances. Photographs of the crowns were taken to measure the angles between each cusp tip. The results are as follows : 1. In boys, PrI, PaI, DBC angle, and MBC angle did not show any statistically significant difference between the two teeth(p>0.05), and moderate level of correlations were observed. 2. In girls, crown index, DBC angle, and MBC angle of the two teeth did not show any statistically significant difference(p>0.05), and moderate level of correlations were recognized. 3. Measurements that did not show statistically significant difference between the two teeth in both boys and girls were DBC angle and MBC angle(p>0.05). In DLC angle, however, statistically significant difference was observed(p<0.01). 4. Most of the measurements showed sex differences, except DBC angle, which did not show any sex difference in both teeth(p>0.05). 유치 치관의 기본적인 구조는 대개 계승 영구치를 닮는다. 그러나 제2유구치는 계승 영구치인 제2소구치보다 오히려 제1대 구치와 더 유사한 경향이 있다. 이에 본 연구는 한국인에서 상악 제2유구치와 제1대구치의 치아계측학적 자료(odontometric data)를 얻어 두 치아의 형태와 크기 사이의 연관성을 살펴보고, 나아가 남녀간의 차이점 유무를 고찰해 보고자 하였다. 남아 150명, 여아 150명 총 300명의 모형을 이용하여 상악 제2유구치와 상악 제1대구치의 근원심 치관 폭경, 협설측 치관 폭경, 각 교두의 직경, 교두정간 거리를 계측하였고, 치관의 교합면 사진을 촬영하여 각 교두정 사이의 각도를 측정하여 다음과 같은 결과를 얻었다. 1. 남아에서 Protocone index, Paraconeindex, Distobuccal cusp(DBC)각, Mesiobuccal cusp(MBC)각은 상악 제1대 구치와 제2유구치 사이에 통계적 유의차가 관찰되지 않았고(p>0.05), 중등도의 상관관계가 확인되었다. 2. 여아에서 crown index, Distobuccal cusp(DBC)각, Mesiobuccal cusp(MBC)각은 상악 제1대구치와 제2유구치 사 이에 통계적 유의차가 관찰되지 않았고(p>0.05), 중등도의 상관관계가 확인되었다. 3. 남, 여 모두에서 Distobuccal cusp(DBC)각, Mesiobuccal cusp(MBC)각은 두 치아 사이에 유의할만한 차이를 보이 지 않았고(p>0.05), Distolingual cusp(DLC)각에서는 통계적 유의차가 관찰되었다(p<0.01). 4. 대부분의 계측치에서 남녀 차이를 나타냈지만, Distobuccal cusp (DBC)각은 상악 제1대구치와 제2유구치 모두에서 남녀 차이를 보이지 않았다(p>0.05).

TSC 합성보의 제작방법에 따른 구조적 거동에 관한 실험적 연구

이지운,김도훈,김성배,이창남,김상섭,김규석 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1(구조계)

Composite action can be achieved by providing shear connectors between steel top flange and concrete topping. Composite sections have larger stiffness than the summation of the individual stiffness of slab and beam, therefore, can carry larger load or similar loads with appreciably smaller deflection and are less prone to transient vibration. T-type Steel Composite beam(TSC-beam) is developed and tested. To make the part of steel beam, we used the way of welding two steel plates as well as the way of folding one steel plate.