• Korean Journal of Construction Engineering and Management
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• v.14 no.6
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• pp.49-60
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• 2013

Evacuation process has been considered as one of the most important elements to be managed in public facilities. Although the importance is highlighted through numerous literatures, disaster evacuation planning, particularly fire accidents, faces a number of human behavior related limitations for a similar application to different types of facilities/occupants. To overcome the obstacles including complexity in human behaviors, a number of simulation techniques with limited consideration on human behaviors are utilized to predict foreseeable problems in evacuation process. Therefore, this research aims to propose system dynamics models incorporating human behaviors considering different types of occupants under disaster evacuation events. Analysis on emergent human behaviors such as group forming and interactions under urgent situation are conducted based on the main stream theories in social science field. The results suggest the influences of human behavior factors including cooperative intention, information sharing, and mobility change to evacuation behavior. The implications are expected to provide safety consideration at planning/designing phase of buildings and help facility safety managers for evacuation planning with more realistic management approaches.

• Korean Journal of Construction Engineering and Management
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• v.23 no.6
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• pp.65-75
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• 2022

As performance measurement is important for systematic management, the key indicators for performance measurement have been consistently researched in the construction industry. However, there are only a few cases in which performance measurement is performed because it requires strenuous efforts to collect data for measurement. Unlike the public sector, which has been collecting project data through laws, the private sector has very little data to measure performance. In contrast, supervision work concerns important data necessary for the performance management on building construction sites in accordance with the Building Act. Therefore, in this study, we used the data from supervisory reports to measure the performance of private building projects. First, we derived 6 performance areas and 15 indicators through a few rounds of expert group discussions and 2 surveys. Then, we identified the performance indicators with high feasibility of data collection and computed their degree of significance via the analytic hierarchy process. It is expected that the performance indicators and their computational processes derived in this study can be used to systematically measure the performance and aid the speedy diagnosis of private building construction sites.

• The Korean Journal of Nuclear Medicine Technology
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• v.15 no.2
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• pp.3-12
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• 2011

Purpose: With increasing medical use of radiation and radioactive isotopes, there is a need to better manage the risk of radiation exposure. This study aims to grasp and analyze the individual radiation exposure situations of radiation-related workers in a medical facility by specific job, in order to instill awareness of radiation danger and to assist in safety and radiation exposure management for such workers. Materials and Methods: From January 1, 2010 December 31, 2010, medical practitioners working in the radiation is classified as a regular personal radiation dosimetry, and subsequently one year 540 people managed investigation department to target workers, dose sectional area, working period, identify the job function-related tasks for a deep dose, respectively, the annual average radiation dose were analyzed. Frequency analysis methods include ANOVA was performed. Results: Medical radiation workers in the department an annual radiation dose of Nuclear and 4.57 mSv a was highest, dose zone-specific distribution of nuclear medicine and in the 5.01~19.05 mSv in the high dose area distribution showed departmental radiation four of the annual radiation dose of Nuclear and 7.14 mSv showed the highest radiation dose. More work an average annual radiation dose according to the job function related to the synthesis of Cyclotron to 17.47 mSv work showed the highest radiation dose, Gamma camera Cinema Room 7.24 mSv, PET/CT Cinema Room service is 7.60 mSv, 2.04 mSv in order of intervention high, were analyzed. Working period, according to domain-specific average annual dose of radiation dose from 10 to 14 in oral and maxillofacial radiology practitioners as high as 1.01~3.00 mSv average dose showed the Department of Radiology, 1-4 years, 5-9 years, respectively, 1.01 workers~8.00 mSv in the range of the most high-dose region showed the distribution, nuclear medicine, and the 1-4 years, 5-9 years 3.01~19.05 mSv, respectively, workers of the highest dose showed the distribution of the area in the range of 10 to 14 years, Workers at 15-19 3.01~15.00 mSv, respectively in the range of the high-dose region were distributed. Conclusion: These results suggest that medical radiation workers working in Nuclear Medicine radiation safety management of the majority of the current were carried out in the effectiveness, depending on job characteristics has been found that many differences. However, this requires efforts to minimize radiation exposure, and systematic training for them and for reasonable radiation exposure management system is needed.

• Applied Biological Chemistry
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• v.50 no.4
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• pp.268-275
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• 2007

Diversity of the mud flat microbial population in Suncheon Bay was investigated by studying extracellular enzyme activities and 16S rDNA sequences. Four culturable bacterial strains with CMCase, xylanase and protease activities were isolated from the wetland and the mud flat. All the strains produced more xylanase activity than CMCase or protease activity, and the properties of the isolate enzymes from the wetland were similar to those from the mud flat. About 2,000 clones were obtained with the 16S rDNA amplified from the metagenomic DNA isolated from the mud samples. Based on the restriction pattern(s), seventeen clones were selected for base sequence analysis. Of the 17 clones, only 35% (6 clones) were found to be cultured strains and 65% (11 clones) to be uncultured strains. The similarities in the base sequences of the clones ranged from 91.0% to 99.9% with an average similarity of 97.3%. The clones could be divided into 7 groups, Proteobacteria (9 clones, 52.9%), Firmicutes (3 clones, 17.6%), Bacteroidetes (1 clone), Flavobacteria (1 clone), Verrucomicrobia (1 clone), Acidobacteria (1 clone), and Chloroflexi (1 clone). Most of the Proteobacteria clones were gamma Proteobacteria associated with oxidation-reduction of sulfur.

• Journal of Life Science
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• v.17 no.12
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• pp.1660-1668
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• 2007

The non-ionic surfactant (NIS) Tween 80 was evaluated for its ability to influence invitro cumulative gas production, dry matter digestibility, cellulolytic enzyme activities, anaerobic microbial growth rates, and adhesion to substrates by mixed rumen microorganisms on rice straw, alfalfa hay, cellulose filter paper and tall fescue hay. The addition of NIS Tween 80 at a level of 0.05% increased significantly (P<0.05) in vitro DM digestibility, cumulative gas production, microbial growth rate and cellulolytic enzyme activity from all of substrates used in this study. In vitro cumulative gas production from the NIS-treated substrates; rice straw, alfalfa hay, filter paper and tall fescue hay was significantly (P<0.05) improved by 274.8, 235.2, 231.1 and 719.5% compared with the control, when substrates were incubated for 48 hr in vitro. The addition of 0.05% NIS Tween 80 to cultures growing on alfalfa hay resulted in a significant increase in CMCase (38.1%), xylanase (121.4%), Avicelase (not changed) and amylase (38.2%) activities after 36 h incubation. These results indicated that the addition of 0.05% Tween 80 could greatly stimulate the release of some kinds of cellulolytic enzymes without decreasing cell growth rate in contrast to trends reported with aerobic microorganism. Our SEM observation showed that NIS Tween. 80 did not influence the microbial adhesion to substrates used in the study. Present data clearly show that improved gas production, DM digestibility and cellulolytic enzyme activity by Tween 80 is not due to increased bacterial adhesion on the substrates.

• Korean journal of food and cookery science
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• v.29 no.2
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• pp.105-113
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• 2013

Consumer organizations usually lead the opinions of the consumers. This study was performed to investigate the perceptions and information needs of consumer organizations on food additives for the promotion of risk communication. A survey was conducted for 4 weeks in March 2012 by using a self-administered questionnaire consisting of 32 questions. Total 111 responses were collected for analysis. 'Safety (91.0%)' was the most important factor influencing the purchase of processed food, and both 'food additives (24.3%)' and 'environmental pollution (23.4%)' were considered as main risk factors. The longer the career of the members had, the higher negative perceptions on food additives (p<0.01). About 70% of the respondents who had known KFDA's researches on evaluating safety of food additives answered that researches were not enough to make sure the safety. Although lectures and other domestic organization were the main channels for getting information, 'TV' was considered as the most suitable way for it. 'Poor risk communication (32.4%)' was pointed out as the serious problem of government's food safety policy. Based on these results, consumer organizations' low level of trust on government should be overcome by continuous supply of information what they need to facilitate risk communication on food additives.

• Journal of the Korean Society of Food Science and Nutrition
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• v.37 no.12
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• pp.1667-1673
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• 2008

This study was conducted to investigate the purchase behavior of environment-friendly agricultural products (EFATs) and to provide necessary information for planning and executing effective marketing strategies for producers and distributors. The subjects of this study were 306 housewives in the Seoul area over the age of 20. The result of this study showed that once a month topped with 38.9% in the frequency of purchase, vegetables were the highest with 83.3% in the percentage of purchase and the place of purchase most frequented by consumers discount stores (45.8%), but purchases from farmers were the lowest with 3.6%. TV/radio topped the list of information resource with 3.42, followed by family/relatives/friends (3.33) and newspaper/ magazine (3.31). Those surveyed listed sanitary condition/freshness (4.43), safety (4.20), nutrition (4.05), and taste (3.99) as major evaluative criteria for choosing organic food, in order of importance. Finally, consumers seem to be satisfied with the nutrition (3.75), safety (3.71), and freshness (3.70) of the products and they were dissatisfied with the price of the products.

• The Journal of the Korea Contents Association
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• v.15 no.3
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• pp.192-198
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• 2015

Checked out by the moving vehicle health checks for patients, practitioners, and the increase in radiation dose outside the vehicle, but an investigation into the leakage of radiation can still be negligible. In this study, through experimental results were as follows: Dose that occurs most often where the leak in the right door $1.14{\pm}1.75mR/h$, X-ray generator in terms of proximity to the top $0.65{\pm}1.25mR/h$, X-ray generator and away to the bottom in terms $0.91{\pm}1.25mR/h$, the adjacent rear detector in the upper part $96.98{\pm}158.88mR/h$ dose of the leak appeared in various locations. By measuring position from the rear of the adjacent detector $67.48{\pm}97.03mR/h$ dose had the highest leakage into. Generating device for diagnosis of radiation safety regulations regarding the maximum leakage dose per week, but all met back when it is displayed in the leakage dose Hourly rates do not ignore the leakage radiation dose were measured. Therefore, a mobile health screening in a vehicle outside of the leakage radiation dose to the liver and move on we are not interested twelve barrier leakage radiation dose of defense has a chance to re-evaluate the standards required, and move the vehicle health check using the X-ray increases as the dose per hour, depending on the criteria for choosing the appropriate measures that will require effort.

• Proceedings of the KAIS Fall Conference
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• 2011.05b
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• pp.1072-1075
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• 2011

이 연구는 진단용 방사선피폭에 대한 환자 및 종사자의 방사선 인식도, 방사선 지식정도, 방사선 피폭의 유해성, 진단방사선의 필요성, 방사선의 피폭방지, 정보파악의 유무 및 파악경로, 방사선 검사 시 심리적 상태에 영향을 미치는 요인을 살펴보고자 하는 연구이다. 2010년 10월 25일부터 11월 10일까지 일개 광역시 소재하는 종합병원 및 의원에 근무하는 방사선사와 2주내에 진단 방사선을 이용한 해당 의료기관에 내원한 환자를 대상으로 총 347부의 유효설문지를 사용 하였다. 방사선에 대한 인식도에 영향을 미치는 요인으로는 환자의 경우, 직업, 2년내 건강검진 경험, 방사선 피폭에 대한 설명을 들은 경험으로 나타났고, 근무자의 경우, 2년내 교육이수 경험으로 나타났다. 방사선에 대한 지식정도에 영향을 미치는 요인으로는 환자의 경우, 2년내 건강검진 경험으로 나타났고, 근무자의 경우, 연령, 근무기관으로 나타났다. 방사선의 유해성에 영향을 미치는 요인으로는 환자의 경우, 성별, 2년내 건강검진 경험, 정보매체로 나타났고, 근무자의 경우, 근무기관으로 나타났다. 방사선의 필요성에 영향을 미치는 요인으로는 환자의 경우, 월소득, 거주지로 나타났고, 근무자의 경우, 결혼상태, 피폭선량계 착용여부, 환자에게 피폭에 대한 설명을 하는 것으로 나타났다. 방사선 피폭방지에 영향을 미치는 요인으로는 환자의 경우, 직업, 월소득, 2년 내 건강검진 경험으로 나타났고, 근무자의 경우 환자에게 피폭에 대한 설명을 하는 것으로 나타났다. 방사선검사의 심리적 상태에 영향을 미치는 요인으로는 환자의 경우, 방사선에 대한 피폭설명을 들은 경험, 직업으로 나타났고, 근무자의 경우, 연령, 경력, 2년내 교육이수 경험으로 나타났다. 그러므로 방사선 종사자들도 방사선의 위해성에 대한 올바른 인식을 하게 하여 방사선 방어를 적극적으로 할 수 있는 행동을 유도하기 위해서는 이용 방사선의 특성에 맞는 방사선 안전 관리 교육 프로그램의 개발과 방사선 종사자 스스로 방사선에 대한 안전성 확보를 위하여 노력해야 할 것이다.

• Journal of the Korean Society of Marine Environment & Safety
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• v.25 no.6
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• pp.717-725
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• 2019

This study is to analyze the effects of the shipping company's core competencies on the satisfaction of the cadets who have completed the consignment practice at the shipping company and on the long-term boarding and onboard company choice after graduation. To do this, the survey was conducted on 211 cadets who completed consignment practice by setting up questionnaires based on prior research. the results of the verification by setting up the hypothesis were then derived as follows: First, the value and persistence of the shipping companies's core competences have a impact on the satisfaction of the boarding practice, with an influence of 32.4 % and 32.7 % respectively. Second, the satisfaction of boarding practice had a significant impact on the choice of the boarding companies after graduation, with an influence of 49.7 %. Third, it has been found that there is a low influence of 4.5 % between the satisfaction of boarding practice and the long-term boarding. Fourth, it was found that 74 percent of the high influence was forming between the selection of the boarding companies and the long-term boarding. Based on research results, it was confirmed that the shipping company would need an effort to improve the satisfaction level of cadets are needed to increase core competencies and to retain excellent crews in order to improve the capability of ship management.