• 환경영향평가
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• 제7권2호
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• pp.89-102
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• 1998

The purpose of this study is to seek AEI(Air Environmental Indices), PSI(Pollutant Standard Index) and the urban air quality control goal(the best available alternative energy program) by assessing the best ratio of energy types used in urban enterprises, based on harmful health effect and air quality standard and costs. This study is focused on an urban area(Puchun), where area sourcees are associated with heavy traffic, large population, and its industrial sources with large emissions. In the first step, air modeling, estimation of AEI and PSI, and benefit-cost analysis were carried out. In the second step, we assessed that 660 scenarios about the ratio of B-C oil, light oil and LNG used in urban enterprises with regard to air quality and cost. In the third step, the best available alternative energy program was selected for the ratio of energy species(B-C oil, light oil and LNG) by using the lexicographic method. From the emission analysis, main source of $NO_2$ is identified as industries and air quality is evaluated according to the ratio of B-C oil, light oil and LNG used in urban enterprise. The modeling data of TSP, $SO_2$, $NO_2$, CO, $O_3$, by ISC3 and PBM are respectively $118{\mu}g/m^3$, 0.027ppm, 0.025ppm, 2.0ppm, 0.55ppm in indurstrial area. That data are close to Environmental Air Quality Standard. By means of sensitivity analysis, we obtained the difference in concentration between the areas(Nae-dong, Joong-dong) according to the ratio of B-C oil, light oil and LNG used in the industries. From the result of alternatives assessment the lowest AEI value and cost, the ratio of B-C oil, light oil and LNG are 2.5%, 20%, 77.5%, respectively.

• 한국재난정보학회 논문집
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• 제17권2호
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• pp.218-225
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• 2021

연구목적과 방법: 소방공무원 국가직화에 따른 다양한 변화 중 소방재정 분야에 주목을 하고, 소방특별회계가 당초 취지와 목적에 맞게 안정적으로 정착될 수 있도록 관련 법령 및 실태 등의 분석을 통해 개선방안을 제시하였다. 연구결과: 소방정책사업비가 소방특별회계 설치의 당초 취지에 부합하여 온전히 소방사업에 사용되어질 수 있도록 인건비에 대한 이중적인 편성기준 개정하는 한편, 예비비의 편성 기준인 "예산총액의 100분의 1 이내 규정"에서 예산총액에 인건비를 포함하고 있어 계속적으로 예비비 편성규모가 증가될 것으로 판단되는바 예비비 편성에 있어 '예산총액'이 아닌 '사업비 총액'으로 변경하는 등의 개선이 필요하다. 결론: 소방특별회계 내의 소방정책사업비가 당초 취지와 목적에 부합하여 편성되고 집행될 수 있도록 예산편성 기준과 규모와 관련해 제도개선이 필요하며, 이를 통해 더욱 안정적인 소방조직의 운영과 소방서비스의 질 향상이 필요하다.

• 한국컴퓨터정보학회논문지
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• 제25권12호
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• pp.1-15
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• 2020

본 논문에서는 토목 분야 설계와 시공 단계에서의 기존의 2D 프로세스들을 향후 BIM 방식의 프로세스들로 전환하기 위한 새로운 방법을 제안한다. 먼저, 생애주기 관점의 토공 및 도로 구조물의 BIM 설계와 시공 단계에서의 수량-공정(4D)-공사비(5D) 연계 활용의 전체 프로세스에 대하여 기존 2D 방식의 성과품과 3D BIM 방식의 성과품들의 실적용 과정을 비교 분석한다. 제안하는 방법은 IFC 국제 공통 표준 파일 정보와 CBS/OBS/WBS 표준 분류 체계 정보를 연계하여 설계 단계의 성과품을 만들고 수량-공정(4D)-공사비(5D) 연계 활용 모듈을 활용하여 시공 단계의 성과품을 만든다. 궁극적으로는 제안하는 방법을 사용하여 토목 분야 BIM 설계와 시공의 단계별 기술들을 상용화하고자 한다.

• 대한건축학회논문집:구조계
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• 제36권2호
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• pp.165-173
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• 2020

The purpose of this research is to evaluate the health performance of existing buildings which completed green remodeling using the WELL Building Standard developed by Delos in the USA. The features and the level of improvement in health were examined and the results were as follows. As a result of comprehensive evaluation of the health performance of the target building, the health performance after green remodeling improvement was improved by 17.3% compared to before green remodeling. As a result of applying the alternatives for improving health performance, improvements were 22.9% by Alternative 1, 28.8% by Alternative 2, and 28.7% by Alternative 3. If the improvement ratio with respect to the construction cost were compared, Alternative 1 was the best followed by Alternative 2. Finally, the cost effectiveness of improving health performance against construction cost were best in the order of self-closing door installation, airtight seal, and pest inspections.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2020년도 봄 학술논문 발표대회
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• pp.202-203
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• 2020

Unlike price calculation by cost accounting, which categorizes costs into material costs, labor costs, and miscellaneous expenses to determine the construction budget price, construction cost calculation based on Construction Standard Unit Prices utilizes unit prices extracted from market prices of items from projects already completed to estimate costs of similar construction projects. Although unit price information is collected through construction site surveys to revise these construction standard unit prices every year, but due to the limitations of the site survey method, it is difficult to quickly implement the rapid changes in the construction methods and market prices. As such, an important issue that arose was the identification of work items whose prices need urgent revision. This study conducted research on factors that need to be considered when developing online survey system for monitoring construction site market prices. This study is expected to enhance convenience for users, and provide an efficient data collection and management system for administrators.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 추계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.258-261
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• 2001

High Power factor Active Filter converter is used for Inverter Air conditioner power supply to meet IEC standard. In the active filter topology for power factor, extra switch just control the input current indirectly to meet the IEC standard for reducing the cost and size. In this paper, low cost converter was suggested by simulation using extra switch which auxiliary pulse is inserted and quasi resonant soft switching topology control is adapted for panel's inverter air conditioner converter Inserting auxiliary Pulse method to the extra switch has the benefit of reducing THD by low cost input control circuit. And also quasi resonant soft switching topology can reduce switching loss. So both technical is suitable for Panel's Air conditioner.

• 한국자동차공학회논문집
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• 제3권5호
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• pp.10-16
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• 1995

In this study, the optimum design is carried out upon the crankshaft of in-line 6-cylinder internal combustion diesel engine with the mechanical analysis for the layout design, which is standard calculation whose process contains quadratic curve fitting method and quasi newton method about cost function, design variables and constraint conditions, Without finite element analysis, this process in wich mechanical analysis is performed upon the most critical part in crankshaft gives necessary and satisfied output in layout design and saves time and cost in developing a new diesel engine. In this study, also, the 3-dimensional finite element method is used in confirming the standard calculation for the optimization of crankshaft and the shape optimization in crankweb is obtained.

• 한국지열·수열에너지학회논문집
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• 제15권1호
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• pp.9-17
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• 2019

Reducing global warming potential has become important, and as one of those methods for reducing it, economic evaluation by applying ice thermal storage air conditioning system was performed. The floor area and height of the subject building was assumed $5,000m^2$ and 20 m. Absorption chillerheater system and air source heat pump system was used for comparing to the subject system, and payback period method was used to perform economic evaluation. Although the running cost of ice thermal storage system is reduced compared to two systems, the ratio is not significant compared to the increase of initial construction expenses, and payback period was calculated to be about 7.7 and 79.3 years. However, the heat storage system should be approached from the viewpoint of long term rather than the economic standard in the present standard.

• 국제학술발표논문집
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• The 1th International Conference on Construction Engineering and Project Management
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• pp.1187-1192
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• 2005

Approximately 25% of military establishments became superannuated to unable perform their function, and it influences on the environment by construction wastes and the waste of national budget, as there is no rational and objective standard even though old facilities have been replaced through modernization project. Therefore, it has been searched to introduce industrial building system that can cope with the new building-construction and transference for the improvement of existing military establishments. However, as there is no economical estimation standard for practical use, industrial building-construction is still remaining at the initial stage, and the study is insufficient too. So. in this study, I would like to develope LCC cost model for rational LCC comparative analysis between industrial construction system (Modular) and existing reinforced concrete structure and cage, and to evaluate economical efficiency through case analysis.

• 정보통신설비학회논문지
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• 제2권4호
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• pp.52-63
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• 2003

This study proposes a change from the currentexpected price integrated system, which is based on the standard of estimated unit manpower and material, to a new actual construction cost integrated system. In order to implement it, the standard method of measurement organization system as well as the communication area standard of estimated unit manpower and material should be changed Moreover, the work breakdown structure and itemized structure should be assorted.