• Proceedings of the Korea Water Resources Association Conference
• /
• 2005.09a
• /
• pp.93-94
• /
• 2005

• Proceedings of the SAREK Conference
• /
• 2005.06a
• /
• pp.65-65
• /
• 2005

• Journal of Korean Society of Occupational and Environmental Hygiene
• /
• v.16 no.4
• /
• pp.413-427
• /
• 2006

It is necessary to study and develop guidelines for providing comfort and health indoor air quality for office workers since air-tight envelope system of current office building may cause poor indoor air quality. The purpose of this study is to propose guideline for volatile organic compounds in office base on the field study, human health risk assessment and cost-benefit analysis. The field study was conducted to survey the concentrations of volatile organic compounds in indoor air of 69 offices from June to September, 2005 in Seoul and Gyeonggi-do. The rate of excess to guideline of volatile organic compounds in indoor air of new apartment on the Ministry of Environment in Korea(MOE) was surveyed 37.6% for benzene, 6.8% for toluene, and 1.5% for ethylbenzene. As the result of human health risk assessment, mean cancer risk did not exceed 10-6 which is guideline of US.EPA. Also, total hazard index did not exceed 1 which is guideline of US.EPA. Through the cost-benefit analysis of angle on the social-economics to verify the necessary to establish the standards of volatile organic compounds for improvement and development of indoor air quality in office, the present value of benefit was higher than the present value of cost. With the above considerations in mind, it is suggested that the field study for indoor air quality in offices should be expanded and human health risk assessment and cost-benefit analysis be performed th offer scientific data for decision-making of policy for improvement and management of indoor air quality in office.

• Journal of Industrial Convergence
• /
• v.18 no.2
• /
• pp.51-57
• /
• 2020

This is a descriptive research to find out the effect of office workers resilience, depression and stress. The research subjects were 123 office workers in one location and data were collected from August 1 to 20, 2018. Collected data were analyzed by t-test, ANOVA, Pearson's correlation, and multiple regression analysis. The research results showed negative correlation between office workers resilience and their depression(r=-.195, p=.040), stress (r=-.424, p=.000). Sub-factors of resilience to affect their depression were satisfaction level in their lives (β=-.299, p=.001) and relationship(β=.300 p=.002). Sub-factors of resilience to affect their stress were satisfaction level in their lives(β=-.315, p=.001). This research was helpful to understand office workers resilience and it is necessary to develop a variety of education and training programs to enhance this.

• Korean Journal of Construction Engineering and Management
• /
• v.18 no.5
• /
• pp.41-49
• /
• 2017

The ordering organizations of civil engineering project manage the construction site indirectly because the construction site is mostly located at a remote location and the public official also manages many sites. Since the civil engineering project has a wide working area, it is not easy to know the status of the whole project quickly by the indirect management method by report of the field practitioner. In order to solve these problems, the field management system between the ordering organization and the field office is changing from offline to online. This study suggests an advanced construction site management system that obtains site-related 3D information with the use of UAV and shares the information between the construction site in remote locations and their supervising authorities. To develop an UAV application system, the problems of field management in many actual sites were analyzed and derived necessary functions such as status reporting and online information management. The developed system was applied to actual field to verify its usability and compared the efficiency improvement with existing field management method.

• Journal of Korean Society of Archives and Records Management
• /
• v.23 no.3
• /
• pp.89-113
• /
• 2023

This study investigates and analyzes the 16th Presidential records (record management secretary's office) from a record-recognition perspective and, based on the results, suggests the Presidential record management plan. To this end, the function of the records management secretary's office was first analyzed, and the 16th Presidential records transferred to the Presidential Archives were reviewed from a general perspective. Next, the nature of the records was investigated in a deductive, top-down manner by quantitatively analyzing the "production system type," "preservation period," "reason for determining the retention period," "management department," "electronic record type," "production year," etc., focusing on the "records file/item," "unit task," and "function." Finally, the characteristics and problems revealed during the record analysis were summarized. Based on the analysis results, a plan was proposed to redesign Presidential record management for the "reorganization" and "service" parts of the records.

• Membrane Journal
• /
• v.20 no.3
• /
• pp.185-196
• /
• 2010

Korea is presently the leading country in global desalination industry and has been investing a large amount of money and human resources in development of new core technologies to increase its' share of global market. In this paper, we reviewed world-wide trends of the advanced water industry and outlined various seawater desalination technologies developed so far. We also made some analysis on the directions and results of the government-lead R&D sponsorship in the field of seawater-freshening technology. Present studies showed that we need an institutional strategy to help domestic companies guarantee the credibility of the technologies developed by themselves based upon their experience of plant operation. Futhermore, strategic R&D programs to develope original technologies and localization of key components for desalination plants should be preceded in the near future.

• Safety and Health at Work
• /
• v.11 no.2
• /
• pp.207-214
• /
• 2020

Background: Prolonged sitting at work can lead to adverse health outcomes. The health risk of office workers is an increasing concern for the society and industry, with prolonged sitting work becoming more prevalent. Objective: This study aimed to explore the variation in muscle activities during prolonged sitting work and found out when and how to take a break to mitigate the risk of muscle symptoms. Methods: A preliminary survey was conducted to find out the prevalence of muscle discomfort in sedentary work. Firstly, a 2-h sedentary computer work was designed based on the preliminary study to investigate the variation in muscle activities. Twenty-four participants took part in the electromyography (EMG) measurement study. The EMG variations in the trapezius muscle and latissimus dorsi were investigated. Then the intervention time was determined based on the EMG measurement study. Secondly, 48 participants were divided into six groups to compare the effectiveness of every break type (passive break, active break of changing their posture, and stand and stretch their body with 5 or 10 mins). Finally, data consisting of EMG amplitudes and spectra and subjective assessment of discomfort were analyzed. Results: In the EMG experiment, results from the joint analysis of the spectral and amplitude method showed muscle fatigue after about 40 mins of sedentary work. In the intervention experiment, the results showed that standing and stretching for 5 mins was the most effective break type, and this type of break could keep the muscles' state at a recovery level for about 30-45 mins. Conclusions: This study offers the possibility of being applied to office workers and provides preliminary data support and theoretical exploration for a follow-up early muscle fatigue detection system.

• Proceedings of the Korean Institute Of Construction Engineering and Management
• /
• autumn
• /
• pp.598-601
• /
• 2003

As the scale of construction work is enlarged, complicated and diversified, construction information from the large number of construction sites is happened and reported to the head office. To control much information generated in construction sites simultaneously, the necessity of supporting system which can extract necessary information is increased. However, compare with large companies, medium-sized companies's organization of head office and management system is weak, so it's difficult to manage multi-projects. Among these site managements, resource management is an important management area. But, resource planning is based on experience and judgement and have not associated with schedule information. So when schedule if changed, the plan must be amended manually. This study investigates material-planning model for multi-project management which is connected with daily report system and scheduling software.

• Journal of Korean Society of Water and Wastewater
• /
• v.33 no.5
• /
• pp.329-339
• /
• 2019

Recently, the advancement of information and communication technology(ICT) is expanding the connectivity through Internet of Things(IoT), and the media of connection is also expanding from wire/cable transmission to broadband wireless communication, which has significantly improved mobility. This hyperconnectivity has become a key element of the fourth industrial revolution, whereas the supervisory control network of purification plants in korea is operated as a communication network separated from the outside, thereby lagging in terms of connectivity. This is considered the best way to ensure security, and thus there is hardly any consideration of establishing alternatives to operate an efficient and stable communication network. Moreover, security for management of a commercialized communication network and network management solution may be accompanied by immense costs, making it more difficult to make new attempts. Therefore, to improve the conditions for the current supervisory control network of purification plants, this study developed a industrial security L2 switch that supports modbus TCP(Transmission Control Protocol) communication and encryption function of the transmission section. As a result, the communication security performance improved significantly, and the cost for implementing the network management system using Historical Trend and information of HMI(Human Machine Interface) could be reduced by approximately KRW 200 million. The results of this study may be applied to systems for gas, electricity and social safety nets that are infrastructure communication networks that are similar to purification plants.