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Effect of Ventilation System in preventing the Infection of COVID-19 in Classrooms
Owen Anderton,Sowoo Park,Doo Sam Song 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.6
This study aims to analyze the effect of ventilation system in preventing the infection of COVID-19 in classrooms. We have set 30 classrooms as target classrooms whereby ventilation system is installed in 10 classrooms and remaining 20 classrooms without ventilation system. The infection probability for each class was calculated using Wells-Riley equation which was combined the concept of rebreathed fraction. We also considered the filtration effect(mask wearing). This work presented the result of field measurement analysis on the effect of ventilation system in reducing the infection probability through CO₂ monitoring. Our results show that the probability of infection was reduced by 61.6% in the classroom with ventilation system compared to the classroom without ventilation system.
Owen, Jeffrey S.,Pyo, Sunyeon,Kang, Guyoung Korean Society of Soil and Groundwater Environment 2015 지하수토양환경 Vol.20 No.5
Biocatalytic degradation of total petroleum hydrocarbons (TPHs) in contaminated soil by hemoglobin and hydrogen peroxide is an effective soil remediation method. This study used a laboratory soil reactor experiment to evaluate the effectiveness of a nonspecific biocatalytic reaction with hemoglobin and H<sub>2</sub>O<sub>2</sub> for treating TPH-contaminated soil. We also quantified changes in the soil microbial community using real-time PCR analysis during the experimental treatment. The results show that the measured rate constant for the reaction with added hemoglobin was 0.051/day, about 3.5 times higher than the constant for the reaction with only H<sub>2</sub>O<sub>2</sub> (0.014/day). After four weeks of treatment, 76% of the initial soil TPH concentration was removed with hemoglobin and hydrogen peroxide treatment. The removal of initial soil TPH concentration was 26% when only hydrogen peroxide was used. The soil microbial community, based on 16S rRNA gene copy number, was higher (7.1 × 10<sup>6</sup> copy number/g of bacteria, and 7.4 × 10<sup>5</sup> copy number/g of Archaea, respectively) in the hemoglobin catalyzed treatment. Our results show that TPH treatment in contaminated soil using hemoglobin catalyzed oxidation led to the enhanced removal effectiveness and was non-toxic to the native soil microbial community in the initial soil.
Review of Variable-flux Permanent Magnet Machines
Owen, R.L.,Zhu, Z.Q.,Wang, J.B.,Stone, D.A.,Urquhart, I. Journal of International Conference on Electrical 2012 Journal of international Conference on Electrical Vol.1 No.1
Variable-flux permanent-magnet machines (VFPM) are of great interest and many different machine topologies have been documented. This paper categorizes VFPM machine topologies with regard to the method of flux variation and further, in the case of hybrid excited machines with field coils, with regard to the location of the excitation sources. The different VFPM machines are reviewed and compared in terms of their torque density, complexity and their ability to vary the flux.
Beliefs of University Employees Leaving During a Fire Alarm: A Theory-based Belief Elicitation
Owens Christopher,Le Aurora B.,Smith Todd D.,Middlestadt Susan E. 한국산업안전보건공단 산업안전보건연구원 2023 Safety and health at work Vol.14 No.2
Background: Despite workplaces having policies on fire evacuation, many employees still fail to evacuate when there is a fire alarm. The Reasoned Action Approach is designed to reveal the beliefs underlying people's behavioral decisions and thus suggests causal determinants to be addressed with interventions designed to facilitate behavior. This study is a uses a Reasoned Action Approach salient belief elicitation to identify university employees' perceived advantages/disadvantages, approvers/disapprovers, and facilitators/barriers toward them leaving the office building immediately the next time they hear a fire alarm at work. Methods: Employees at a large public United States Midwestern university completed an online cross-sectional survey. A descriptive analysis of the demographic and background variables was completed, and a six-step inductive content analysis of the open-ended responses was conducted to identify beliefs about leaving during a fire alarm. Results: Regarding consequence, participants perceived that immediately leaving during a fire alarm at work had more disadvantages than advantages, such as low risk perception. Regarding referents, supervisors and coworkers were significant approvers with intention to leave immediately. None of the perceived advantages were significant with intention. Participants listed access and risk perception as significant circumstances with the intention to evacuate immediately. Conclusion: Norms and risk perceptions are key determinants that may influence employees to evacuate immediately during a fire alarm at work. Normative-based and attitude-based interventions may prove effective in increasing the fire safety practices of employees.
National Division, Rural Lives, and Anti-war Sentiment in Cha Beom-seok's Forest Fire
Owen Stampton 한국학중앙연구원 한국학중앙연구원 2018 THE REVIEW OF KOREAN STUDIES Vol.21 No.1
Realist playwright Cha Beom-seok’s name is synonymous with the Korean stage. Despite a significant body of work, his 1962 play Forest Fire has attracted the most attention achieving both critical and commercial acclaim during the socio-economically difficult time that was post-war South Korea. Academic work on Cha’s writing naturally focuses on the realist elements of his plays, although a number of studies focus on thematic elements of anti-communism across his plays due to the trend of nationalistic writing that stressed anti-communist rhetoric in the post-war years. Despite this interpretation, there is also a significant amount of evidence that points towards a more balanced, anti-war stance especially relating to Forest Fire. This work explores a number of ways in which Cha presents anti-war views rather than attacking a particular ideology, such as his exploration of distrust and suspicion as a symptom of ideological conflict on village dynamics, war’s destructive effects on human beings abilities of feel love and sexual fulfillment, and also the way in which the stage and set design can be used to convey his views on the effects that the war had on Koreanness.
앤드류 오웬 동아대학교 조형연구소 1997 조형연구 Vol.- No.3
This mural painting was created by Canadian artist andrew Owen and a group of nine are students from Dong-a University, as a part of the cultural segment of the Canada Days in Pusan event from January 20 to 24, 1998. This event was organized by the Canadian Embassy in Seoul and the canadian Consulate in Pusan to recognize the increasingly important partnership between Pusan, Korea's second largest city with enormous economic and cultural potential, and Canada.