http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
양원호,김홍석,현명택 제주대학교 공과대학 첨단기술연구소 2004 尖端技術硏究所論文集 Vol.15 No.2
Air pollution from auto-vehicle exhausted gas accounts for 70% of entire air pollution in Jeju. The introduction of electric vehicles which do not generate discharge emissions will improve the clean image in Jeju and boost tour industry. Driving tests have been conducted on the 5·16 and Ilju Roads to investigate the driving characteristics of electric vehicles, using Santa Fes provided by HyunDai Motor Co. The state of charging battery decreases rapidly on the uphill road of 546 Road, while it shows linear decreases on the flat road of Ilju Road. It is required to improve the charging ability of battery to adopt the electrical vehicle in Jeju.
공단지역과 시골지역 주택 실내, 실외 및 개인의 이산화질소 노출평가
양원호,임성국,손부선,Yang, Won-Ho,Im, Sung-Guk,Son, Bu-Soon 한국환경보건학회 2008 한국환경보건학회지 Vol.34 No.3
Indoor air quality can be affected by indoor sources, ventilation, decay, and outdoor levels. Various indoor and out-door combustion sources produce nitrogen dioxide ($NO_2$), which is a by-product of high temperature fossil fuel combustion. Especially, the presence of gas ranges and smoking have been identified as major factors contributing to indoor $NO_2$ exposures. In this study, we compared an industrial complex area with a country area by assessing the personal exposure to $NO_2$with measurements of indoor and outdoor $NO_2$ levels in residences and by house characteristics and questionnaire. Personal exposure concentrations were significantly correlated with indoor $NO_2$ concentrations of residences in both the industrial complex area and the country area with correlation coefficients of 0.561 and 0.664, respectively, compared to outdoors. Multiple regression analysis, indicated that indoor $NO_2$ levels in residences were only affected by outdoor levels (p = 0.000) in spite of higher indoor sources such as smoking. Therefore, it is suggested that outdoor air quality as well as indoor air quality should be considered in the reduction of the personal exposure to air pollutants.
기후변화에 따른 대기오염물질 농도 변화 및 미세먼지 노출에 의한 건강 영향
양원호 한국보건사회연구원 2019 보건복지포럼 Vol.269 No.-
최근 미세먼지에 대한 국민적 관심은 날씨와 온도보다 미세먼지 농도를 우선 확인할 만큼 높다. 그뿐만 아니라 경유 노후 차량 폐기, 화력발전소 중지, 학교 교실의 공기청정기 설치 등에 찬성할 정도다. 지난 수년간 대기 중 미세먼지 농도는 미약하게 감소 경향을 나타내고 있다. 하지만 미세먼지(PM<sub>10</sub>) 중 건강 위해가 더 높은 초미세먼지(PM<sub>2.5</sub>)의 비중은 높아지고 있는 실정이다. 국민들이 체감하는 미세먼지에 대한 불안감은 더욱 높아지고 있다. 이것은 국민들이 미세먼지 노출에 따른 건강 영향을 실감하고 있으며, 미세먼지노출 정보를 적절히 제공받지 못하는 위해 소통의 부재 때문이라고 생각한다. 미세먼지 노출은 조기 사망을 포함해 다양한 건강 영향을 야기하는 것으로 보고되고 있다. 기후변화는 대기 중 미세먼지 농도 수준에 영향을 줄 수 있기 때문에 함께 관리해야 한다. 미세먼지 발생원 관리, 산업장 집진 기술 개발, 노출 저감, 대기환경기준 강화 등 다양한 대응 방안을 제시할 수 있지만, 근원적으로 미세먼지 저배출의 친환경 사회구조 (green society)가 되어야 한다.
구획모델을 이용한 주택에서 이산화질소의 발생강도 및 감소상수 동시 추정
양원호,손부순,손종렬,Yang Won-Ho,Son Bu-Soon,Sohn Jong-Ryeul 한국환경보건학회 2005 한국환경보건학회지 Vol.31 No.4
Indoor air quality might be affected by source strength of indoor pollutants, ventilation rate, decay rate, outdoor level, and so on. Although technologies measuring these factors exist directly, direct measurements of all factors are not always practical in most field studies. The purpose of this study was to develop an alternative method to estimate the source strength and deposition constant by application of multiple measurements. For the total duration of 60 days, indoor and outdoor $NO_2$ concentrations every 3 days were measured in 30 houses in Seoul, Asan and Daegu. Using a compartment model by mass balance and linear regression analysis, penetration factor (ventilation divided by sum of air exchange rate and deposition constant) and source strength factor (emission rate divided by sum of air exchange rate and deposition constant) were calculated. Subsequently, the source strength and deposition constant were estimated. Natural ventilation was $1.80{\pm}0.42\;ACH,\;1.11{\pm}0.50\;ACH,\;0.92{\pm}0.26\;ACH$ in Seoul, Asan and Daegu, respectively. Calculated deposition constant(K) and source strength of $NO_2,$ in this study were $0.98{\pm}0.28\;hr^{1}\;and\;16.28{\pm}7.47\;ppb/h,$ respectively.
두께가 변화하는 부재 내의 혼합모드 I / III 균열의 응력확대 계수해석 - 3차원 유한요소해석 중심으로 -
양원호,최용식,조명래 한국자동차공학회 1993 오토저널 Vol.15 No.2
Variable thickness plates are commonly encountered in the majority of mechanical/structural components of industrial applications. And, as a result of the unsymmetry of the structure or the load and the anisoptropy of the materials, the cracks in engineering structures are generally subjected to combined stresses. In spite of considerable practical interest, however, a few fracture mechanics study on combined mode crack in a variable thickness plate have carried out. In this respect, combined mode 1/3 stress intensity factors $K_{1}$ and $K_{3}$ at the crack tip for a variable thickness plate were obtained by 3-dimensional finite element analysis. Variable thickness plates containing a central slant crack were chosen. the parameters used in this study were dimensionless crack length .lambda. crack slant angle .alpha, thickness ratio .betha. and width ratio .omega. Stress intensity factors were calculated by crack opening displacement(COD) and crack tearing displacement(CTD) method proposed by Ingraffea and Manu. The effect of thickness ratio .betha. on $K_{1}$ is relatively great in comparison to $K_{3}$.
거주지역 실내공기 특성 및 이산화질소 노출에 관한 연구
양원호,배현주,정문호 한국환경보건학회 2002 한국환경보건학회지 Vol.28 No.2
Indoor air quality is affected by source strength of pollutants, ventilation rate, decay rate, outdoor level and so on. Although technologies exist to measure these factors directly, direct measurements of all factors are impractical in most field studies. The purpose of this study was to develop an alternative methods to estimate these factors by multiple measurements. Daily indoor and outdoor NO2concentrations for 21 days in 20 houses in summer and winter, Seoul. Using a mass balance model and linear regression analysis, penetration factor (ventilation divided by sum of air exchange rate and deposition constant) and source strength factor(emission rate divided by sum of air exchange rate and deposition constant) were calculated. Subsequently, the ventilation and source strength were estimated. During sampling period, geometric mean of natural ventilation was estimated to be 1.10±1.53 ACH, assuming a residential NO2decay rate of 0.8 hr-1 in summer. In winter, natural ventilation was 0.75±1.31 ACH. And mean source strengths in summer and winter were 14.8ppb/hr and 22.4ppb/hr, respectively. Although the method showed similar finding previous studies, the study did not measure ACH or the source strength of the house directly. As validation of natural ventilations, infiltrations were measured with CO2 tracer gas in 18 houses. Relationship between ventilation and infiltration was statistically correlated (Pearson r=0.63, p=0.02).