개인 소음폭로량과 청력손실에 관한 추적조사

김원술,홍영습,김양석,이상주,박경일,정갑열,김준연,Kim, Won-Sool,Hong, Young-Seoub,Kim, Yang-Seak,Lee, Sang-Ju,Park, Kyung-Il,Jung, Kap-Yull,Kim, Joon-Youn 대한예방의학회 1994 Journal of Preventive Medicine and Public Health Vol.27 No.2

For the purpose of presenting the basic data for the establishment of control measures on the long-term noise exposed workers, this study was carried out on the relationship between personal noise exposed dose and hearing loss on the 67 male workers whose hearing threshold had exceeded 40 dB in 4,000 Hz, from 1990 to 1992. Conclusively, the level of hearing loss was significantly related to personal noise exposed dose in follow-up period. We considered that personal noise exposed dose which was measured by the personal noise dosemeter was more efficient rather than the noise level of workplace for the evaluating the long-term change of hearing acuity. And although in the case of not-diagnosed as noise induced hearing loss. it was suspected that the active control programs such as improvement of noisy environment or early transfer to proper workplace were needed on the workers who exposed with over 90 dB in personal noise exposed dose.

나선형 초고층건물의 공력불안정 진동과 공력감쇠에 관한 연구

김원술,아키히토 요시다,타무라 유키오,이진학,Kim, Wonsul,Yoshida, Akihito,Tamura, Yukio,Yi, Jin-Hak 한국전산구조공학회 2016 한국전산구조공학회논문집 Vol.29 No.1

본 논문에서는 변위응답 및 가속도 응답의 저감 효과에 있어서, 유리한 형상인 $180^{\circ}$ 나선형(Helical $180^{\circ}$) 초고층건물을 대상으로 풍진동실험을 수행하여 나선형 초고층건물의 공력불안정 진동 특성 및 공력감쇠 특성을 조사하였고, 정방형 초고층건물의 결과와 비교분석 하였다. 본 연구에서의 공력감쇠율은 RD법(random decrement technique)을 이용하여 평가하였다. RD법에 의해 평가된 공력감쇠율은 기존문헌 및 준정상가정이론 결과와 비교 검증하였다. 실험결과, 공력진동 실험결과 $180^{\circ}$ 나선형모형의 풍직각방향에 대한 공력불안정 진동은 발생하지 않는 것이 확인되었다. 정방형과 $180^{\circ}$ 나선형 형상에 대한 공력감쇠율을 살펴보면, X방향에 대한 공력감쇠율은 무차원 풍속이 증가와 비례하여 점진적으로 증가하는 경향이 나타났다. 반면, Y방향에 대한 공력감쇠율은 정방형모형과 매우 다른 양상이 나타나는 것을 알 수 있었다. In this paper, aeroelastic instability and aerodynamic damping ratio of a helical $180^{\circ}$ model which shows better aerodynamic behavior in both along-wind and crosswind responses on a super tall building was investigated by an aeroelastic model test, and the aerodynamic damping ratio was evaluated from the wind-induced responses of the model by using Random Decrement Technique. Aerodynamic damping ratios evaluated in this study were verified through comparison with previous results obtained by quasi-steady theory. As a result, the aeroelastic instability of the helical $180^{\circ}$ model in crosswind direction were not occurred for any conditions with increasing the reduced wind velocity while the square model generally encounters aeroinstability due to the vortex shedding. The aerodynamic damping in along-wind direction for the helical $180^{\circ}$ and the square model increased monotonically both with reduced wind velocity, i.e., there is no relation with modifications of building shapes. On the other hand, in crosswind direction, the characteristics of aerodynamic damping ratio with reduced wind velocity for helical $180^{\circ}$ model were quit different from those of the square model.

다양한 변장비를 가진 고층건축물에 작용하는 풍력의 상관 분석

김원술,요시다 아키히토,타무라 유키오,Kim, Wonsul,Yoshida, Akihito,Tamura, Yukio 한국전산구조공학회 2015 한국전산구조공학회논문집 Vol.28 No.2

본 연구는 고층건축물의 기본설계 단계에서 평면형태를 결정할 때, 응용할 수 있도록 다양한 형상을 가진 고층건축물에 작용하는 풍력 및 풍응답에 대한 데이터베이스를 구축하는데 목적이 있다. 따라서 본 논문에서는 풍력데이터베이스의 초기단계로, 높이 200m이상의 고층건축물의 변장비(D/B=0.33, 0.50, 0.77, 0.83, 0.91, 1.0, 1.1, 1.2, 1.3, 2.0, 3.0) 변화에 따른 풍력의 특성을 조사하고 기존 문헌과의 비교 검토를 통해 실험결과를 검증하였다. 또한 풍하중조합의 관점에서 풍방향-풍직각방향, 풍방향-비틀림방향 및 풍직각방향-비틀림방향 간의 풍력의 상호상관에 대해서 검토하였다. 실험결과, 풍방향 및 풍직각방향에 대한 평균 및 변동 모멘트계수와 풍직각방향 및 비틀림방향 변동모멘트계수의 파워스펙트럼밀도의 결과는 기존 연구결과와 잘 부합되는 것으로 나타났다. 또한, 지표면조도의 변화에 따른 풍방향, 풍직각방향 및 비틀림방향에 대한 풍력의 특성은 큰 변화가 없는 것으로 나타났다. 시간영역과 주파수영역에서의 변동모멘트의 상호상관계수 분석결과, 풍직각방향-비틀림방향 변동모멘트계수의 상호상관계수가 높게 나타나는 경향을 보였다. The objective of this study is to construct the TPU aerodynamic database with wind tunnel test data of overall wind loads and responses on tall buildings. In this study, wind tunnel tests were conducted to investigate characteristics of wind forces and the effect of wind load combination by cross-correlation analysis among along-wind overturning moment, across-wind overturning moment and torsional moment on a tall building with various side ratios(D/B=0.33, 0.50, 0.77, 0.83, 0.91, 1.0, 1.1, 1.2, 1.3, 2.0 and 3.0) for different terrain roughnesses. The results of wind tunnel tests were compared with those of past literatures. As a result, there was no significant effects of changing of terrain roughnesses on moment coefficients and power spectral densities of across-wind overturning moment coefficients and torsional moment coefficients with various side ratios. Further, these results were good agreement with those of past literatures. From cross-correlation analysis, the across-wind overturning moment coefficients were highly correlated with the torsional moment coefficients. The results of this study will be helpful for practical designers in preliminary design stage.

한국인 직장성인과 그 배우자의 Aplipoprotein A-I & B 분포

김원술,김동일,서병성,Kim, Won-Sool,Kim, Dong-Il,Suh, Byung-Sung 대한예방의학회 2007 예방의학회지 Vol.40 No.1

Objectives : This study was performed to investigate the distribution of apolipoproteins A-I and B among Korean employees and their partners. Methods : The study population consisted of 7,633 men and women (4,578 men and 3,054 women) residing in Seoul and Kyung-gee Do, with an average age of $43.5{\pm}8.3$ years. Blood samples were collected following at least 12 hours of fasting. Apolipoproteins A-I and B were measured using a Behring Nephelometer analyzer. The body mass index (BMI) for each participant was calculated as weight (kg) divided by height squared $(m^2)$. Information on health-related behaviors such as exercise, alcohol intake, and smoking habits was collected through self-administrated questionnaires. Results : The mean concentrations of Apo A-I were $132.6{\pm}22.3mg/dL$ and $142.9{\pm}24.8mg/dL$ in the men and women, respectively. The concentration of Apo A-I increased significantly across all age categories of men. The mean concentrations of Apo B were $101.7{\pm}23.2mg/dL$ and $87.8{\pm}23.5mg/dL$ in the men and women, respectively, and Apo B increased significantly across all age categories for both the men and women. Exercise and BMI were major determinants for Apo A-I and B levels. The 10th percentile of Apo A-I concentration was 109 mg/dL in the men and 113 mg/dL in the women, and the 90th percentile of Apo B concentration was 131 mg/dL in the men and 118 mg/dL women. Conclusions : For the prevention of coronary artery disease, we recommend that for individuals in the 10th percentile of concentration for Apo A-I and the 90th percentile of concentration for Apo B, active preventive interventions such as weight loss and exercise should be taken. This study, within its limitations, may be useful for evaluating apolipoprotein A-I and B concentrations in Korean adults.

소방관의 근골격계 증상과 직무 스트레스에 관한 연구

김정만 ( Jung Man Kim ),서병성 ( Byung Seong Suh ),정갑열 ( Kap Yeol Jung ),김동일 ( Dong Il Kim ),김원술 ( Won Sool Kim ),조한석 ( Han Seok Cho ),김진욱 ( Jin Wook Kim ),권재 ( Jae Kwon ),윤동영 ( Dong Young Yoon ),김정일 ( Jung 한국산업위생학회 2007 한국산업보건학회지 Vol.17 No.2

Firemen are directly exposed to various harmful chemicals, physical factors and mental stress during rescue and firefighting. In fire extinguishing, unstable posture, poisonous gas, dust, high temperature and heavy equipments are possible hazardous factors. The alertness for emergency, shift work, job strain and stress are also possibly hazardous. Therefore, this study aimed to investigate the prevalence of musculo-skeletal symptoms and job stress and to determine risk factors in firemen. This study was carried out in a group of 226 firemen in Busan City, Korea. Standardized Nordic Questionnaire was used to investigate the prevalence of musculo-skeletal symptoms and Psycho-social Well-being Index (abbreviated PWI) was used to investigate the prevalence of job stress. General and occupational characteristics were included education, marital status, alcohol and smoking history, working duration, and work shift system. Body mass index (BMI) scores were calculated by physical examination including height and weight. Concerning musculo-skeletal complaints, the commonest site was neck, and shoulder, lower back, upper back were the next. Complaint site above one area of body was about 80%. From multiple logistic regression analysis, working duration was significant variable in musculo-skeletal symptoms. Odds ratio were 15.4 in working duration. About 16.8% was high risk stress group. From multiple logistic regression analysis, shift work and alcohol drinking were significant variables in PWI scores. Odds ratios were 2.25 in shift work. Accordingly, interventions are needed for health promotion of long term and shift worker.

소방관의 근골격계 증상과 직무 스트레스에 관한 연구

김정만(Jung Man Kim),서병성(Byung Seong Suh),정갑열(Kap Yeol Jung),김동일(Dong Il Kim),김원술(Won Sool Kim),조한석(Han Seok Cho),김진욱(Jin Wook Kim),권재(Jae Kwon),윤동영(Dong Young Yoon),김정일(Jung Il Kim) 한국항공우주의학협회 2006 항공우주의학회지 Vol.16 No.2

다양한 풍환경에 노출된 초고층건물의 공력진동 특성

김원술(Kim, Wonsul),김용철(Kim, Yong Chul) 대한건축학회 2015 大韓建築學會論文集 : 構造系 Vol.31 No.8

Using the conventional and tapered super-tall buildings, aeroelastic wind tunnel experiments were conducted to investigate the effect of taper on fundamental aeroelastic behaviors in various incident flows. Three different wind environmental conditions were simulated: a turbulent boundary-layer flow representing urban area; a grid-generated flow; and a low-turbulent flow. Results were summarized focusing on the effect of taper and the effect of wind environmental conditions. By using the tapered building shape, the suppressions of responses were profound in the boundary-layer flow and low-turbulence flow, but in the grid-generated flow, the response becomes larger than that of the conventional square model when the wind is applied normal to the surface. The pros and cons of the tapered building shape in various wind environmental conditions were clearly seen.

풍직각방향과 비틀림방향의 응답상관을 고려한 풍하중 조합

김원술(Kim, Wonsul),김용철(Kim, Yong Chul) 대한건축학회 2015 大韓建築學會論文集 : 構造系 Vol.31 No.4

The wind tunnel test was conducted to investigate characteristics of fluctuating wind forces acting on tall buildings for various side ratios (D/B=1.0, 1.1, 1.2, 1.3, 2.0 and 3.0) and different terrain roughnesses. Further, the wind load combination was examined by the correlation of the displacement response between acrosswind and torsional directions through Spectral Modal Analysis Method and Time History Analysis Method. As a result, there was no significant effect of the changing of terrain roughnesses on fluctuating moment coefficients for acrosswind and torsional directions, but they were varied with the changing of wind directions. Acrosswind overturning moment coefficients were highly correlated with the torsional moment coefficient with the increase in wind directions. The response and correlation obtained by Time History Analysis were good agreement with those of Spectral Modal Analysis. Also, the response correlation between acrosswind and torsional directions was highly affected by natural frequency ratios. Hence, the wind load combination for acrosswind and torsional directions shall be considered that when the natural frequencies between acrosswind and torsional directions are close to each other.

장기 계측 데이터를 이용한 가거초 해양과학기지의 동특성 평가

김원술(Wonsul Kim),이진학(Jin-Hak Yi),민인기(In Ki Min),심재설(Jae Seol Shim) 한국연안방재학회 2017 한국연안방재학회지 Vol.4 No.5

In order to study ocean and meteorological changes related to the global climate change and global warming, Korea is operating several ocean research stations (ORS) including Ieodo ORS, Gageocho ORS and Sochengcho ORS in remote ocean area. In 2011, the Gageocho ORS was attacked by Typhoon Muifa and was damaged to its structural members and various observation equipments. After that, the Gageocho ORS was reconstructed with increased height by 5m and then dynamic response measurement system has been built to assess the structural integrity of Gageocho ORS whether it is healthy or not. Using the measured dynamic response data including acceleration and tilt, the structural dynamic characteristics of the Gageocho ORS were investigated. As a result, three natural frequencies of the first two bending modes and the first torsional mode were estimated as 1.79 Hz, 1.82 Hz and 2.65 Hz, respectively, and the difference between natural frequencies for two bending modes is not significant because is almost symmetrical shape. It is also found that, when the acceleration response is larger, the damping ratios in first mode can be obtained more consistently with lower irregular fluctuations. The averaged damping ratio was about 0.7%. The present results and those obtained from long term monitoring can be used to identify and to assess the structural integrity of the Gageocho ORS, and can be useful in preliminary design of offshore structures.

건축물의 공간스케일을 고려한 내압의 평가 방법

김원술(Kim, Wonsul),김용철(Kim, Yong-Chul) 대한건축학회 2020 대한건축학회 학술발표대회 논문집 Vol.40 No.2