• 한국지하수토양환경학회지:지하수토양환경
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• 제26권1호
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• pp.24-33
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• 2021

Analysis of long term affecting factors on water quality items of gas emission form (BOD, COD) and leachate emission form (T-N, non-bio-degradable COD (NBDCOD)) was performed for the SUDOKWON 1st Landfill Site (LS1) and 2nd Landfill Site (LS2). As landfill gas was generated, BOD and COD decreased from 6,887 and 20,025 mg/L in 1993 to 49.5 and 670.2 mg/L in 2019, respectively. TN and NBDCOD increased with waste decomposition but gradually decreased after landfill closure because of the precipitation infiltration effect. Due to the drastic decline of carbon in the leachate, the BOD/TN ratios of LS1 and LS2 declined from 13.0 and 17.0 during early stage of the landfill to 0.07 and 0.16 in 2019, respectively; LS2 and NBDCOD/COD increased from 0.25 to 0.65 during the same period. These conditions caused carbon deficiency in denitrification treatment and a chemical post-treatment request for NBDCOD. The different behaviors of gas emission and leachate emission items suggest the necessity of different strategic approaches in the long term perspective.

• Asia pacific journal of information systems
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• 제25권2호
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• pp.403-422
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• 2015

Social media websites have continued to proliferate, and the way in which people stay connected has also evolved. The issue of user loyalty a website remains crucial given that the competition is severe. Websites need loyal users who continue to use their sites to survive and be successful. In this research, we applied self-regulation framework to investigate the factors leading to user loyalty to a social media site. In particular, the role of sense of belonging, which is a common emotional reaction to a social media site, is examined. A survey of users in a popular social media site in Taiwan was conducted. Results show that both sense of belonging and service quality have direct effect on loyalty, whereas trust affects loyalty indirectly by fostering a sense of belonging. Service quality affects loyalty through trust and sense of belonging. Notably, trust has insignificant effect on loyalty as originally proposed. Users are then classified into two groups, namely, heavy and light users, based on their usage. Among light users, service quality has no direct effect on loyalty. Therefore, sense of belonging has sole direct impact on loyalty. Both service quality and sense of belonging contribute to loyalty in users who spend more time online. Implications of this study are also discussed.

• 국제학술발표논문집
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• The 2th International Conference on Construction Engineering and Project Management
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• pp.50-60
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• 2007

The endeavor of this paper focuses on designing a monitoring system to provide a cost-effective solution on quality assurance for construction projects. The construction site monitoring system integrates a long-range wireless network, network cameras, and a web-based collaborative platform. The users of the system could obtain the most updated status of construction sites, such as behaviors of workers, project progress, and site events anywhere with Internet connectivity. It was carefully configured in order to maintain the reliability under the reactive conditions of the construction sites. This paper reports the architecture of the monitoring system and reviews the related technologies. The system has been implemented and tested on a construction site and promising results were obtained.

• 대한안전경영과학회지
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• 제19권4호
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• pp.141-148
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• 2017

This researcher selected basic variable to investigate the effective relations of establishment and management of resting facility on reduction of constructional disasters and safety accidents and improvement of working efficiency for construction workers. Based on the measured variables, this researcher investigated phenomenon, recognition and satisfaction for using and demanding resting facility by long-term construction in construction site for workers of huge construction site in Seoul, conducted survey of total 219 questionnaires so as to grasp implications of workers' resting facility demanded in long-term huge construction site and effects on reduction of disasters and conducted structural equation analysis. As a result, resting faciity factor, management factor, and hygienic service factor were significant and resting and food factors were not significant. Therefore, it's expected to reduce personal disaster by improving quality of constructional resting facility, hygienic service, and resting facility management and especially, resting facility management factor makes lots of effects on prevention of personal disasters, so it was a strongly main factor. By suggesting the guideline of establishment and management service of proper resting facility through this research, positive recognition and constructional disaster reduction can be expected in construction site.

• 한국물환경학회지
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• 제26권6호
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• pp.986-993
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• 2010

Spatially distributed on-site devices such as bioretentions and bioboxfilters are becoming more common as a means of controlling urban stormwater quality. One approach to modeling the cumulative catchment-scale effects of such devices is to resolve the catchment down to the scale of a land parcel or finer, and then to model each device separately. The focus of this study is to propose a semi-distributed model for simulating urban stormwater quantity and identifying best sites for spatially distributed on-site stormwater control devices in an urban drainage system. A detailed model for urban stormwater improvement conceptualization simulation is set up for a $0.9342km^2$.

• 한국정보통신학회논문지
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• 제8권1호
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• pp.192-199
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• 2004

건설공사가 대형화, 복잡화 그리고 전문화 되어감에 따라 공사의 정보도 양적으로 팽창하고, 질적으로도 고도 전문화되어 가고 있으므로, 공정관리를 보다 효율적으로 관리하기 위한 전산시스템의 필요성이 대두되고 있다. 현재는 현장사무소에만 전산시스템을 도입하여 공정관리를 수행하고 있으며, 공정관리를 위한 데이터를 입력하고 확인하는 작업은 건설현장에서 현장사무소까지 직접 도보로 이동하여 처리하고 있다. 이에 따라 본 논문에서는 건설현장과 현장사무소를 이어주는 무선통신시스템을 구축하고, 건설현장에서 PDA를 이용하여 즉각적으로 본사의 데이터베이스에 공정데이터를 입력하고 확인할 수 있는 응용프로그램을 개발하였다. 이를 통해 기존의 건설현장에서 이루어지던 공정관리를 개선하여 인력, 장비, 시간, 비용 등을 절감할 수 있는 효과를 기대할 수 있다.

• 한국건축시공학회지
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• 제17권4호
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• pp.361-367
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• 2017

건축프로젝트의 성공적인 수행을 위해서는 현장 조직의 커뮤니케이션 수준을 높여서 조직 구성원의 협업 능력을 향상시켜야 한다. 따라서 본 연구의 목적은 건축프로젝트 현장 조직을 대상으로 현장 조직 커뮤니케이션이 프로젝트 성과에 어떤 영향을 미치는지 파악하는 것이다. 연구 결과 커뮤니케이션 품질은 프로젝트 성과에 긍정적인 영향을 미치며, 정보공유는 프로젝트 성과에 부정적인 영향을 미치는 것으로 나타났다. 따라서 건축프로젝트 성과를 향상시키기 위해서는 현장 조직에서 정보공유를 일정수준 이상 달성해야 하고, 커뮤니케이션 품질을 향상시켜야 한다. 본 연구 결과는 건축프로젝트 현장 조직의 수행관리 체계를 구축하는데 기여할 수 있을 것이다.

• 한국디지털건축인테리어학회논문집
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• 제9권3호
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• pp.69-76
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• 2009

The importance of efficient construction site management has been growing as the amount of construction information increases which is used in the growing construction site. Accordingly in this study, we are trying to find out the application situation and possibility of BIM through theoretical examination and domestic & overseas case study of BIM and we are trying to suggest the way of efficient construction site management formulation through implementation phase-oriented and cooperation entity-oriented analysis in the construction site. We found out that it was possible to minimize time loss and financial loss by visualizing 2D drawings through 3D modeling of target building by applying BIM and that it was possible to improve accuracy of budget planning with quantitative information of 3D model, to plan construction process with more confidence due to accurate architectural information of drawings and quantitative information, and to manage cost and quality through process management based on construction information acquired by BIM including object information by part. It is concluded that we can improve efficiency of construction management between field and each cooperating entity by integrating and linking BIM information through this process.

• 품질경영학회지
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• 제37권3호
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• pp.74-82
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• 2009

This article presents a six sigma project for improving purchase conversion rate in mobile game site. The project was carried out based on DMAIC process. First, a defect rate is defined as low purchase conversion rate. In addition, 60-days purchase data was analyzed and it is shown that the defects level was 2.48 sigma level. In this study, in order to raise the sigma level, six personalization services were used in the mobile game site. Six factors were determined based on FDPM(Functional Deployment Process Map), fishbone chart, linear regression analysis, effort-performance matrix, and so on. The sigma level of defects has improved from 2.48 to 2.93.

• 산업경영시스템학회지
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• 제24권63호
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• pp.89-99
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• 2001

This paper proposes assessment of quality management activities based on cost of quality. Cost of quality is considered prevention cost, appraisal cost, internal failure cost, external failure cost in this paper. This paper shows quality cost magement system in thermal power site devision according to activity analysis. Cost of quality in power industries provides a valuable method of both proving the need for improvement and giving a starting point for projects.