포항시의 재이용시설은 시설용량 100천m3/일로 전처리시설(UF), RO 여과시설, 폐수처리시설로 구성되어 있다. 총운영비(20년)는 181,992백만원(09년)으로 전력비 35.9%, 막 교체비 22.2%, 대수선비 14.1%, 약품비 13.7%, 인건비/제경비 8.5%, 경상수선비 3.6%, 보험료 2.0%로 구성되며, 지난 3년 동안 운영비 집행현황은 전력비 42.4%, 약품비 14.6%를 차지하였다. 원가관리 방향은 전력비 절감(전력 거래시장 참여, 전기요금 단가 차이를 이용한 부하 변동 운전, ESS 도입 및 운영)과 UF/RO 막 관리(세정력을 극대화하는 약품 및 세정, 내오염성 및 염제거 성능이 탁월한 RO 막의 선정)등을 설정, 실행하고 있다.

최근 밭농업의 기계화와 생력화에 대한 연구와 개발이 활성화되고 있다. 그러나 밭농업의 기계화율은 비교적 낮을 뿐 아니라, 농작업이 단계별로 기계화되고 있기 때문에 밭농업의 생력화에 기여하지 못하고 있다. 따라서 본 연구의 목적은 밭농업을 생력화하기 위하여 구현한 일관작업 복합기의 포장능률 및 비용분석을 통하여 생력화율을 평가하는데 있다. 경운·정지, 두둑성형, 방제, 멀칭 및 파종·정식모듈을 포함하여 다섯 작업모듈을 일관화한 복합기의 이론작업시간은 0.56hr/10a으로 관행과 비교하여 67%의 생력화율을 보였다. 유효포장능률은 0.09ha/hr로서 관행에 비하여 2.95배 우수하였고 부담면적은 9.07ha로 평가되었다. 비용분석에서는 복합기의 초기구입비가 43% 절감되는 것으로 평가되었으며 시간당 비용과 단위면적당(10a) 비용은 관행에 비하여 각각 68% 및 58% 정도 절감되었다. 따라서 트랙터 복합작업기를 이용한 일관화된 밭작업은 관행에 비하여 생력화에 상당히 기여하는 것으로 평가된다.

The steel pipe manufacturing industry deals with facilities and materials. Especially thermal facilities are close to vapor cloud explosion (VCE) and may cause secondary damage to facilities because they deal with corrosive substances such as hydrofluoric acid, sulfuric acid and acid, fire, explosion, leakage etc. It is in danger. In this study, hazard identification method was conducted using HAZOP techniques and quantitative risk analysis was conducted using e-CA, a program that supports accident impact analysis. Equipment in the influence range of ERPG - 3 was determined to be a facility requiring replacement. It was decided that neutralization is necessary using slaked lime. Based on the cost of loss, We presented the proper replacement which is the timing of the dangerous facility. As a result, It was ideal to replace the facilities with 20 years of heat treatment facilities, one year of hydrofluoric acid storage tank, 20 years of sulfuric acid storage tank, and 5 years of hydrochloric acid storage tank.

PURPOSES: Most of the traffic surveys are carried out by an inspection method by the manpower. In some cases, the video equipment is used only in some regions when the traffic volume is surveyed. In this case, there is environmental restriction that the road equipment to fix the video equipment should exist. Also, in areas where information such as digital maps and satellite photographs is old or not provided, they are forced to rely on manpower research, but it is difficult to put huge amounts of time and money into the research in places where labor supply and demand is difficult. This difficulty is particularly pronounced in overseas business. METHODS : The purpose of this study is to improve the efficiency of business by using the drones in the traffic investigation through analysis of the cost reduction effect between the existing method and the proposed method in the overseas business traffic survey. The scope of the research is limited to the scope of research, and based on the case of overseas projects, the method of using drone for each research sector is suggested. RESULTS: In the traffic condition survey section, we propose the use of drone for traffic survey and queue length survey, and it is confirmed that there is a cost saving effect of 16% ~ 27% compared with the existing method. In the road condition survey, we propose the use of drones for road surface linear survey, geometry survey, and obstacle survey, and it was confirmed that the cost reduction effect is 39% ~ 93% compared to the existing method. CONCLUSIONS: In addition to overseas business, it is expected that it will have a positive effect on research time and cost reduction by using drone in traffic survey in domestic area where labor supply is not easy or basic data is insufficient.

목적 : 본 연구는 국가치매관리사업과 관련된 공공데이터를 수집하여 치매안심센터에서 시행되는 작업치료 의 비용편익분석을 통해 미래의 국가치매관리사업의 효율화 방안을 모색하고자 한다. 연구방법 : 2016년 1월부터 12월까지의 국가치매관리사업 관련 공공데이터를 정보공개 창구를 이용하여 수집하였다. 수집된 자료를 토대로 작업치료 비용편익분석을 위한 각종 변수를 정의하고, 빈도분석 및 산술계산으로 변수의 값을 산출했다. 결과 : 우리나라에서 서울은 모든 자치구에서 치매관리사업을 시행하고 있고, 사업수행인원 전원이 전담인력으로 배치되어 있다. 특히 작업치료 전담인력을 치매안심센터의 96.0%에 배치하여 치매안심센터 서비스에서 작업치료를 제공하고 있다. 치매안심센터에서 시행되는 작업치료의 순 편익은 작업치료 전담인력이 배치된 경우 서울에서 약 73억 원으로 산출되었다. 결론 : 서울과 같은 형태로 국가치매관리사업 사업을 확대하고, 작업치료 전담인력을 통한 프로그램 시행으로 치매관리비용을 절감하는 효과가 있을 것으로 기대된다. 치매 국가책임제 추진으로 치매관리사업이 국가 단위의 보건사업으로 발돋움하고 있는 지금 한정된 보건의료자원을 효율적으로 사용하기 위해서는 치매안심센터에서 작업치료의 확대가 필요할 것으로 보인다.

Cost allocation studies on the rational allocation method for the common cost of the joint products or services that provide different benefits to each economic entity under the constraints of the efficiency and fairness. Cooperative game theory is often used for cost allocation and studies on a fair and efficient allocation of the utility if some feasible utility for a whole or subset of the players in a game is given. This study shows a variety of cooperative game theory approaches and discusses the pros and cons of each approach.

Recently in Construction field, It has been the big issues to produce an Eco-friendly Construction material and to solve problems about the First grade–Aggregates’ supply&demand. While the Eco-friendly Construction materials which are refurbished and reproduced from construction wastes and industrial by-products have a great deal of effectiveness such as cost or CO2 emission reduction, there is an additional logistical cost due to go through with some processes for recycle such as Intermediary treatments or management and collection of materials. Furthermore, Demand of the First grade-Aggregates is rising and spreading all over the nation for the improvement of Road driving performance, But there is also an additional logistical cost for supply&demand due to the cost of transport growth by sites of construction. In this study, the process and methodology of the new material supply and demand route routings using the Arc Gis Program and the calculation of the available distance through economic analysis are presented. After examining the cost status of construction materials and logistics costs by examining the literature review and related industry, economic feasibility was obtained by comparing the price of general construction materials with the total cost of comparable materials and logistics costs. After an economic analysis, ArcGis3.0 was used to visualize the materials’ supply&demand route and As a result, We can observe the economically secured route from the construction materials’ production plant to where the domestic transportable route and nodes mapped. Throughout the study, the pre-groundwork for an efficient use of the construction materials is able to be prepared and It will be helpful to invigorate supply&demand. In addition to the economic analysis in the future, If the real-time traffic information (traffic volume, speed, environment, etc.) and the performance (structure, functionality, etc.) of each construction materials are reflected, It will be possible to build a decision system for selecting construction materials which meet consumers’ various needs.

Now days, customer’s health awareness is of extreme significance. Food can become contaminated at any point during production, preparation and distribution. Therefore, it is of key importance for the perishable food supply chain to monitor the food quality and safety. Traceability system offers complete food information and therefore, it guarantees food quality and safety. The current study postulates a low cost IoT-based traceability system that utilized RFID and smartphone-based sensors. The RFID handheld reader based on smartphone is utilized to track and trace the product. In addition the smartphone-based sensor is used to measure temperature, humidity, and location during storage and transportation. The proposed system was verified for kimchi supply chain in Korea, and revealed significant benefits to managers as well as customers by providing the real-time product information, location as well as complete temperature and humidity history. The results displayed that compared to the traditional methods, the proposed system is capable of tracking products as well as processing an immense input of data efficiently and effectively.

Recently, Korean companies have become more interested in overseas market, and semi-finished goods have become more and more active. In addition, most of Korean companies are in the form of Complete Knock Down, which is produced in low-wage countries in accordance with glottalization. As a result of the logistics movement between countries, there are many controversies such as tax problems and transfer of added value. Therefore, most companies set Transfer Price with the support of external organizations. In this paper, we propose a practical method for the proper transfer price setting using the cost-plus pricing method.

본 연구는 BIM 도입 효과를 극대화할 수 있는 현장 적용성 확보에 중점을 둔 철근콘크리트 골조공사의 BIM 견적모델 작성과 BIM기반 견적 업무 프로세스를 표준화한 가이드라인을 제시하는 것을 목적으로 한다. 이를 위하여 기존 지침 및 가이드라인의 BIM 견적모델 작성 범위 및 방식을 고찰하고, 철근콘크리트공사 수량산출·견적 지침 및 기준을 분석하며, 기존 견 적 방식과 BIM기반 견적 방식에 대해 비교분석한다. 이를 통하여 BIM기반 견적 업무의 표준 프로세스를 수립하고, 콘크리 트/거푸집/철근 견적모델의 작성 및 수량산출 기준을 도출하며, 철근콘크리트공사 BIM기반 수량산출 및 견적 업무의 성과 물 목록 및 양식을 제시한다. 본 연구를 통해 작성된 BIM 견적 가이드라인은 BIM기반의 새로운 기술환경에 대한 진입장벽 을 낮추고, 견적의 정확성 극대화를 통한 원가절감을 실현하며, BIM 업무와 건설산업의 생산성과 부가가치를 증대시켜, 궁 극적으로 건설사업 전 생애주기에서 생산되는 정보를 통합 관리할 수 있는 기반을 구축하고 BIM 생태계를 조성하는데 기여 할 것으로 기대한다.

In the defense acquisition, a company’s goal is to maximize profits, and the government’s goal is to allocate budgets efficiently. Each year, the government estimates the ratio of indirect cost sector to defense companies, and estimates the ratio to be applied when calculating cost of the defense articles next year. The defense industry environment is changing rapidly, due to the increasing trend of defense acquisition budgets, the advancement of weapon systems, the effects of the 4th industrial revolution, and so on. As a result, the cost structure of defense companies is being diversifying. The purpose of this study is to find an alternative that can enhance the rationality of the current methodology for estimating the ratio of indirect cost sector of defense companies. To do this, we conducted data analysis using the R language on the cost data of defense companies over the past six years in the Defense Integrated Cost System. First, cluster analysis was conducted on the cost characteristics of defense companies. Then, we conducted a regression analysis of the relationship between direct and indirect costs for each cluster to see how much it reflects the cost structure of defense companies in direct labor cost-based indirect cost rate estimates. Lastly a new ratio prediction model based on regularized regression analysis was developed, applied to each cluster, and analyzed to compare performance with existing prediction models. According to the results of the study, it is necessary to estimate the indirect cost ratio based on the cost character group of defense companies, and the direct labor cost based indirect cost ratio estimation partially reflects the cost structure of defense companies. In addition, the current indirect cost ratio prediction method has a larger error than the new model.

PURPOSES : So far, aged cement concrete pavement on express highways has been rehabilitated mainly with asphalt concrete inlay. However, potholes were the major problem, and they shortened the life of the inlay mainly owing to the poor drainage of water once it infiltrated the interface of the concrete and asphalt. The purpose of this study is to compare the performance and economic efficiency of asphalt overlay and inlayMETHODS: Overlay and inlay were compared through accelerated pavement testing, and a life-cycle cost analysis was conducted in this study using the CA4PRS program.RESULTS and CONCLUSIONS : It was found from accelerated pavement testing that the overlay exhibited reflective crack resistance that was more than twice as effective as that of inlay. The total cost (construction cost + user cost) within the analysis period (20 years) of the overlay was 37% lower than that of the inlay.

Ceramic membranes can be applied under extreme operating conditions such as low pH, high pressure and high temperature. In particular SiC has excellent mechanical properties and also has excellent properties related to membrane performance. However, high processing temperature increases cost of SiC products and thus limit’s its use. In this study oxidation bonding technique was used to fabricate cost-effective SiC microfiltration membrane at low temperature. The oxidation behavior at different thermal treatments was related with pore morphology and ultimately the membrane permeability. We have found that the membrane made by coating of oxidation bonded SiC layer over clay-bonded SiC support, sintered at 1000-1100°C could make a defect-free microfiltration membrane with pure water permeability above 700 LMH per bar. The membrane has narrow pore size distribution with average pore size about 0.1 μm.