• 한국환경과학회지
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• 제25권6호
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• pp.767-787
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• 2016

In this study, we analyzed on-site monitoring data for 15 tributaries in Geumho watersheds for 3 years (2011-2013) in order to sort out priorities on water quality characteristics and improvement. As a result of estimating contribution to contamination of the tributary rivers, Dalseocheon showed the highest load densities, despite the smallest watershed area, with 22.7% $BOD_5$, 30.7% $COD_{Mn}$, 31.3% TOC and 47.6% TP. After conducting PCA (principal component analysis) and FA (factor analysis) to analyze water quality characteristics of the tributary rivers, the first factor was classified as $COD_{Mn}$, TOC, EC, TP and $BOD_5$, the second factor as pH, Chl-a and DO, the third factor as water temperature and TN, and the fourth factor as SS and surface flow. In addition, arithmetical sum of each factor's scores based on grading criteria revealed that Dalseocheon and Namcheon were classified into Group A for their highest scores - 96 and 93, respectively -, and selected as rivers that require water environmental management measures the most. Also, water environmental contamination inspection showed that Palgeocheon had the most number of aquatic factors to be controlled: $BOD_5$, $COD_{Mn}$, SS, TOC, T-P, Chl-a, etc.

• 한국건축시공학회지
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• 제14권1호
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• pp.76-86
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• 2014

The cause of crack on reinforced concrete structures is varied, while the studies, which have intended to analyze this in the material side, have been the mainstream so far. Therefore, in this study, we intended to suggest the proposals for enhancement of the system to reduce crack and to improve the quality of the reinforced concrete structures, by reviewing the cause of crack mainly in the structural aspect and analyzing the practices and the system. The result has been shown as following. (1) As one of the measures for improving the constructional system related to the structure, it is to enhance the relevant system so that design on construction, structure, and equipment, can be separately ordered or jointly ventured, and the owner or the agent of the owner can discuss and mediate the business in each specialized field. (2) Importance on construction supervision and new establishment of regulations related to structure supervision.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2007년도 추계학술대회논문집
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• pp.1425-1429
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• 2007

Consumer's product selection measures are being shifted from the units' operational performance to overall performance. Low noise, low vibration, and low power consumption rate, etc. which used to be additional quality indices, now become vital performance factors. Especially, noise and vibration characteristics are being considered as equivalent to/or even more critical than operational performance in certain products such as office machines and home entertainment systems, which share the same space with human being's daily life. Therefore, noise reduction and sound quality improvement technology becomes an inevitable design issue for those applications. Qualitative noise characteristics of rotating polygonal disk applied to digital printer systems are presented. Overall sound pressure level change and tonal noise variation with respect to the geometrical properties of polygonal disk, operational speed, and others are briefly discussed based on experimental results.

• 품질경영학회지
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• 제42권2호
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• pp.165-177
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• 2014

Purpose: This study analyzes the strategical priority to improve eco-labelling certification system, focused on biodegradable resin. Methods: This study will come up with measures to operate the eco-Label certification system related to biodegradable products more effectively and efficiently by discovering various problems related to the system, using causal loop diagram and AHP analysis. Results: This study shows that the government should play more important role while firms could also serve their roles in the initial and stabilizing stages of the eco-labelling certification system, in order to vitalize the eco-Label certification system more effective. Conclusion: This study addresses strategic eco-labelling policies on governmental and firm's operation and providers guidance to practitioners in addressing strategic decision relating to eco-labelling certification system.

• 대한산업공학회지
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• 제24권2호
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• pp.211-221
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• 1998

It is very important to have a satisfactory measurement system, since it is useless to try to improve the manufacturing process without an adequate measurement system. Therefore, evaluation of the measurement system is the first step for the quality improvement of the manufacturing process. To estimate the measurement error we must conduct a controlled gage repeatability and reproducibility(gage R&R) study. Many manufacturers use a gage or instrument to measure multiple dimensions for the overall quality of the manufactured parts. In this case, it is necessary to estimate the gage R&R for multiple dimensions. When a gage measures a large number of dimensions of a part, it is very time-consuming and costly to measure all the dimensions. In this paper we propose the use of the principal component analysis method to identify a few principal components out of the original multivariate measurement capability to explain most of the measurement system variation pattern.

• 한국소음진동공학회논문집
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• 제18권6호
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• pp.606-611
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• 2008

Consumer's product selection measures are being shifted from the units' operational performance to overall performance. Low noise, low vibration, and low power consumption rate, etc. which used to be additional quality indices, now become vital performance factors. Especially, noise and vibration characteristics are being considered as equivalent to/or even more critical than operational performance in certain products such as office machines and home entertainment systems, which share the same space with human being's daily life. Therefore, noise reduction and sound quality improvement technology becomes an inevitable design issue for those applications. Qualitative noise characteristics of rotating polygonal disk applied to digital printer systems are presented. Overall sound pressure level change and tonal noise variation with respect to the geometrical properties of polygonal disk, operational speed, and others are briefly discussed based on experimental results.

• 한국물환경학회지
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• 제28권6호
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• pp.786-795
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• 2012

Water quality management should be focused on the pollution concentrated area so that the improvement of water quality can be achieved effectively for the management of Total Maximum Daily Loads (TMDLs). It is necessary to consider discharge characteristics in the TMDL plan. This study analysed discharge characteristics such as pollution generation and discharge load density, and reduction potential by each unit watershed, and categorized the unit watershed into four groups according to its discharge load characteristics. This analysis can be used as helpful information for the prioritization of pollution reduction area and selection of pollution reduction measures in the development of TMDL plans.

• 농촌지도와개발
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• 제3권1호
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• pp.95-106
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• 1996

Pig industry has been one of the most important sector in Taiwan since 1970s, and produce one fourth of the agricultural income. The industry has made great improvements in breeding, raising and quality production while marketing and processing have interrelated efficiently with production. As one of the mayor factor to the present success, cooperative research and extension has been institutionalized among the government agencies, farmer`s associations and research institutions, inter-linked with the farmer`s problem-solving process. At present, the industry is seeking an appropriate strategy and measures to upgrade the pollution control and cost efficiency in production. This paper reviewed an industry case historically in Taiwan in order to draw the implications to the emerging farm sector in which international competitiveness and quality improvement are to be considered.

• 한국건설관리학회논문집
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• 제20권3호
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• pp.97-104
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• 2019

건설업은 옥외이동생산, 주문제작 생산이라는 특징을 지니고 있어 기계화나 자동화가 어렵기 때문에 인력에 대한 의존도가 높은 산업이다. 따라서 양질의 기능인력 확보와 양성이 중요하지만 과거부터 수요에 비해 공급이 지속적으로 부족한 실정이다. 특히 청년층 인력은 높은 노동강도, 임시직 일용직 고용구조, 불투명한 미래비전 등으로 인해 건설업 취업을 더더욱 기피하고 있다. 현재 국내에는 청년층 기능인력을 양성하기 위한 기관으로 특성화 고등학교 건설 관련학과가 편성되어 있으나, 졸업 후 건설업으로 취업하는 비율이 낮으며, 기능역량도 낮은 실정이다. 본 연구에서는 이러한 문제점을 개선하기 위해 특성화 고등학교의 교육 훈련실태를 분석하여 문제점을 도출하고, 교육체계의 중점개선사항을 도출하였다. 또한 분석 결과에 대한 개선방안으로 교육 훈련경력 인정방안의 마련, 기업체와의 산학협력 확대, 외부 교육기관과의 연계 확대를 제시하였다.

• 한국재난정보학회 논문집
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• 제19권1호
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• pp.18-30
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• 2023

연구목적: 본 연구는 서울시 철도터널 건설공사의 공사계측비 분석 및 개선방안을 도출하여 건설계측의 신뢰향상으로 계측기술 발전에 기여한다. 연구방법:공사계측비의 설계 및 계약 현황, 공사계측비의 적용 현황 및 분석, 안전관리비와 품질관리비 분석, 이를 개선하기 위해 계측관리용역에 대한 대가 산정기준 적용 확대와 발주처에서 직접 발주하는 방안을 제시한다. 연구결과: 그동안 건설공사에 포함하여 발주하던 계측관리용역을 입찰참가자격 사전심사를 통하여 발주처에서 계측업체를 직접 선정하여 계측을 수행하면 계측 품질을 높이고 정확한 계측데이터 확보가 가능하다. 결론:계측관리용역에 대한 대가 산정기준은 시공사에서 하도급으로 수행하게 되는 순공사비 내에 포함하는 방식이 아닌 발주처 직접 발주로 엔지니어링진흥법에 따른 실비정액가산방식과 지반조사 표준품셈의 계측관리비 산출기준의 적용을 확대해야 한다.