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공기 중 유기용제 농도수준이 방독마스크 정화통의 활성탄 흡착용량에 미치는 영향
박두용,Park, Doo-Yong 한국환경보건학회 2011 한국환경보건학회지 Vol.37 No.1
The adsorption capacity of charcoal is a function of the airborne concentration of the target chemical. To evaluate the adsorption capacity of charcoal packed in the cartridges of air purifying respirators, breakthrough tests were conducted with carbon tetrachloride for three commercial cartridges (3M models #7251, #6000 and AX) at 25, 50, 100, 250 and 500 ppm. Adsorption capacities were calculated using a mass transfer balance equation derived from the curve fitting to the breakthrough curves obtained experimentally. Carbon micropore volumes were estimated by iteration to fit the Dubinin/Radushkevich (D/R) adsorption isotherm. They were 0.6566, 0.5727 and 0.3087 g/cc for #7251, #6000 and the AX cartridge, respectively. Above 100 ppm (at high challenge concentrations), #7251 and #6000 showed higher adsorption capacities. However, as the challenge concentration decreased, the adsorption capacities of #7251 and #6000 sharply dropped. On the other hand, the adsorption capacity of the AX cartridge showed little change with the decrease of the challenge concentration. Thus, the AX showed a higher adsorption capacity than #7251 and #6000 at the 5-50 ppm level. It is concluded that service-life tests of cartridges and adsorption capacity tests of charcoal should be conducted at challenge concentration levels reflecting actual working environmental conditions. Alternatively, it is recommended to use the D/R adsorption isotherm to extrapolate adsorption capacity at low concentration levels from the high concentration levels at which breakthrough tests are conducted, at a minimum of two different concentration levels.
계절 ARIMA모형을 이용한 스포츠센터의 여성회원객에 대한 수요예측
설민신(Min Sin Sul),박두용(Doo Yong Park) 한국여성체육학회 2011 한국여성체육학회지 Vol.25 No.3
As the number of female participants increases, the necessity of practical and scientific demand prediction of female sport participants is rising. In order to predict the demand, we performed a times-series analysis for female swimming, aerobic and yoga program in a sport center located in Yong-in during the period of October, 2004 - July, 2011. We have selected the ARIMA(1, 1, 0) model through diagnosing model specification - parametric estimation - model suitability diagnosis and analyzed through SPSS 18.0 version. According to our research, the number of female participant has decreased gradually from October to February and has increased after February as summer season approaches.
EnergyPlus와 eQUEST를 이용한 공동주택의 난방에너지소비량 비교분석에 관한 연구
박두용(Park, Doo-Yong),윤갑천(Yoon, Kap-Chun),김강수(Kim, Kang-Soo) 한국태양에너지학회 2013 한국태양에너지학회 논문집 Vol.33 No.1
Energy consumption analysis of multi-family apartment is an important area of research for the design of energy-saving housing. In this study, we selected a universal type of Flat-type apartments and analyzed the heating energy consumption of variables such as U-value, G-value, infiltration rate, heating setpoint and boiler efficiency with EnergyPlus and eQUEST. With these results, we identify the characteristics of EnergyPlus and eQUEST and provided base data for the design of energy-saving housing. The results indicate that infiltration rate is the most important factors to consider. And eQUEST heating energy consumption is approximately 10% higher compared to the EnergyPlus under same condition.
박두용(Doo-Yong Park),임건표(Gun-Pyo Lim) 한국조명·전기설비학회 2011 한국조명·전기설비학회 학술대회논문집 Vol.2011 No.5월
There are a number of power plant equipment to operate the machinery, electrical equipment, control equipment based on the fuel control, air control, water chemistry process control, power generation control equipment, etc. It has been installed final consumption of electricity produced from generators are safely to supply home and the plant by a load such as to prevent electrical accidents from occurring, if there is trouble accidents quickly separate section for removed to prevent the spread of the incident.
유해작업 사내도급 금지와 관련된 논란 및 개정방안에 관한 고찰
박두용 ( Doo Yong Park ) 한국산업보건학회 2014 한국산업보건학회지 Vol.24 No.1
Objectives: The purpose of this study is to review the debate on the Article 28(Prohibition of Inhouse-Contract for Harmful Work) of the Industrial Safety and Health Law. Methods: Literatures and recent debate for prohibition and permission of inhouse-contract for harmful work were reviewed. Proposals of revision for the Article 28 of the Industrial Safety and Health Law were also reviewed. Results: It was not found reasonable to revise the Article 28 based on increased fatal accidents or diseases in the electroplating work and heavy metals handling works that are currently listed in the Presidential Decree under the law as the harmful works. Regulation types of prohibition or authorization for any harmful work shall have inherently poor coverage since the scope of application is extremely limited. Contractors for maintenance and repair of chemical facilities may not be included in the scope of application if the harmful works are defined as chemical handling works. If harmful works are prohibited, the contractor workers may loose their jobs. Therefore, it is necessary to consider balancing job security and occupational safety and health safety. Conclusions: Various limitations were found in the Article 28 and the proposals to revise it. Currently in-house subcontracting is widely spread in the workplace. Therefore, it may be inappropriate to set one or two Article such as the Article 28 and 29 to protect in-house subcontract workers from injury and illness. It is believed that it needs fundamental redirection and new approach with new paradigm to impose occupational safety and health duty to prime contractors.