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거주 후 평가를 통한 국가지정 입원치료병상 시설 개선 방향 도출에 관한 연구
정다운 ( Jeong¸ Dawoon ),권순정 ( Kwon¸ Soonjung ) 한국의료복지건축학회 2021 의료·복지 건축 Vol.27 No.3
Purpose: The negative pressure isolation ward is a key facility in preparedness and response to infectious diseases. For the sustainable operation of the facility, appropriate facility improvement is required. The experience of medical staff responding to infectious diseases in the COVID-19 pandemic provides effective informations for facility planning. Methods: The post occupancy evaluation (POE) was conducted by interviewing medical staff who is working on Nationally designated negative pressure isolation ward in general hospital. Floor plan analysis was conducted before field surveys for identifying facility characteristic and spatial composition. After that, field surveys were conducted at 3 hospitals, and interviews and fieldwork were conducted together. Results: It is necessary to increase the standard size of ward area from 15㎡ to 20㎡. The size of the doffing room has to be planned for accommodation of two or more people. Equipment storage, clean storage and waste storage also should be properly planned. There were almost no problems with the circulation in the ward. There was not enough space for medical staff. Implications: For a sustainable and safe negative pressure isolation ward planning, it is necessary to exploit learning from the medical staffs who have many experiences of coping with infectious diseases.
Dawoon Jeong,Sung H. Han,Jiyoung Kwahk,Mingyu Lee,Kyudong Park,Ju Hwan Kim,Seokmin Oh,Gunho Chae 대한인간공학회 2017 대한인간공학회 학술대회논문집 Vol.2017 No.4
The aim of this study is to investigate millennials’ characteristics of media devices usage. Millennial generation who is also called as “digital native” is used to multi-device environment. Demographically, they will make up almost 75% of workforce by 2025. In the market of media-related devices, millennials will be main target customers to product designers and developers because they are interested in media and have high purchasing power. Therefore, it is needed to survey on their characteristics of media usage. Web based user survey was conducted for 360 millennials for a week. The user survey was composed of three parts; degree of interest in media device, devices in use, and purpose of using media. As the results, most of them were highly interested in media and media-related devices. They enjoyed to music with smartphones or computers when they took a rest or were on the way. In the case of photo/video, they mostly used smartphones during resting, traveling, or on the way to interact/commune with other people. The results of the study can be used in inferencing millennials’ needs and designing the devices for them.
Development of Supportive Tool Ideas Preventing Violations in Nuclear Power Plants
Dawoon Jeong,Sung H. Han,Dong Yeong Jeong,Bora Kang 대한인간공학회 2016 대한인간공학회 학술대회논문집 Vol.2016 No.11
The aim of this study is to develop ideas about functionalities of a task supportive tool to prevent violations which is due to the human errors in nuclear power plants. Human errors are the major cause of the accidents in a nuclear power plant, and could result in tremendous social and economic loss. We need to prepare measures to prevent human errors. For fundamental and effective prevention of human errors, solutions should be deduced in accordance with types of human errors. For idea generation, a morphological analysis was conducted by three ergonomic experts with three factors which stimulate ideas; (1) medium of supportive tools, (2) supportive function and (3) guidelines for preventing violations. We developed additional ideas from representative accidents by violations in the different industries. Generated ideas were evaluated by feasibility, viability, effectiveness, and discriminability. Importance weights of these evaluation measures were determined by the analytic hierarchy process. Among the ninety ideas derived from the analysis, wearable devices and monitoring/feedback functions frequently appeared in top 10 ideas. The results of this study can be used for developing supportive tools for preventing violations in nuclear power plants.
Identification and characterization of a marine-derived chitinolytic fungus, Acremonium sp. YS2-2
Dawoon Chung,Kyunghwa Baek,Seung Seob Bae,정재준 한국미생물학회 2019 The journal of microbiology Vol.57 No.5
Chitin is the most abundant biopolymer in marine environments. To facilitate its utilization, our laboratory screened marine-derived fungal strains for chitinolytic activity. One chitinolytic strain isolated from seawater, designated YS2-2, was identified as Acremonium species based on morphological and phylogenetic analyses. Acremonium species are cosmopolitan fungi commonly isolated from both terrestrial and marine environments, but their chitinolytic activity is largely unknown. The extracellular crude enzyme of YS2-2 exhibited optimum chitinolytic activity at pH 6.0–7.6, 23–45°C, and 1.5% (w/v) NaCl. Degenerate PCR revealed the partial cDNA sequence of a putative chitinase gene, chiA, in YS2-2. The expression of chiA was dramatically induced in response to 1% (w/v) colloidal chitin compared to levels under starvation, chitin powder, and glucose conditions. Moreover, the chiA transcript levels were positively correlated with chitinolytic activities under various colloidal chitin concentrations, suggesting that ChiA mediates chitinolytic activity in this strain. Our results provide a basis for additional studies of marinederived chitinolytic fungi aimed at improving industrial applications.
Dawoon Chung,김하련,Hyun Seok Choi 한국미생물학회 2019 The journal of microbiology Vol.57 No.9
Salterns are hypersaline extreme environments with unique physicochemical properties such as a salinity gradient. Although the investigation of microbiota in salterns has focused on archaea and bacteria, diverse fungi also thrive in the brine and soil of salterns. Fungi isolated from salterns are represented by black yeasts (Hortaea werneckii, Phaeotheca triangularis, Aureobasidium pullulans, and Trimmatostroma salinum), Cladosporium, Aspergillus, and Penicillium species. Most studies on saltern-derived fungi gave attention to black yeasts and their physiological characteristics, including growth under various culture conditions. Since then, biochemical and molecular tools have been employed to explore adaptation of these fungi to salt stress. Genome databases of several fungi in salterns are now publicly available and being used to elucidate salt tolerance mechanisms and discover the target genes for agricultural and industrial applications. Notably, the number of enzymes and novel metabolites known to be produced by diverse saltern-derived fungi has increased significantly. Therefore, fungi in salterns are not only interesting and important subjects to study fungal biodiversity and adaptive mechanisms in extreme environments, but also valuable bioresources with potential for biotechnological applications.