Depreciation accounting has as its main objective, the recovery of the original cost of plant investment less net salvage, over the estimated useful life of that plant. Accuracy of the whole life technique in meeting this objective depends entirely on the

본 논문은 사례조사를 통해 국내외 대규모 실내경기장의 소방방재계획상의 특정을 분석함으로서 향후 국내에 건립될 대공간 건축물의 소방방재계획 수립에 활용될 기초자료를 도출코자 하였다. 본 논문에서는 국내의 소방방재설비관련 법규 검토와 국내 3개, 국외 8개의 대규모 실내경기장을 대상으로 화재감지설비 소화설비 배연설비 피난계획 적용현황을 조사하여 대공간의 소방방재시스템의 동향을 파악하고 이들을 비교, 분석하였다. 연구 결과 대규모 실내경기장의 화재감지설비는 공간특성에 적합한 적외선화재감지기, 염감지기 등이 유력한 화재감지설비로 사용되며, 소화설비는 건식살수설비, 방수총소화설비 등이 채택되었으며 배연에서는 축연시스템이 적극 활용됨을 확인하였다.

In order to supply the high-quality electric power, several researches have been conducted. For the high-quality power, it is necessary to inspect the power lines and insulators before the lines or insulators are disconnected or damaged. However, it is not enough to inspect all the power lines by human inspectors. In previous study, a power line inspection robot was developed to investigate the power lines and insulators. According to replace the human operators by the robot, the inspection robot has several advantages: the improved working conditions, machine accuracy, and the prevention of accident. However, the robot has some defects in its heavyweight. In this study, a lightweight inspection robot has been developed using a RP and a vacuum casting. And, this study developed a fault detection monitoring program for the high voltage equipment using a microphone which detects the location of fault and the thermal imaging and CCD cameras which verifies the fault and stores the image, respectively.

Remarkably improvements have occurred recently in the maintenance management of physical assets and productive systems, so that less wastages of energy and resources occur. The technology of maintenance is about finding and applying cost-effective ways of avoiding or overcoming performance deterioration. Maintenance is thus a vital support function in business, especially as increasingly large investments are being required in physical assets. TPM(Total Productive Maintenance) focuses on optimizing planning scheduling. Availability, performance and quality rate are other factors that affect productivity. Especially there are some losses that affect the overall equipment effectiveness(OEE). These losses lead to low values of OEE, which provides an indication of how effective the production precess is. This study explores the ways in which Korean small and medium manufacturing industries can improve OEE.

Today's fierce competition and global economic recession make most of manufacturing companies in the world difficult to gain a profit. In order to survive such a environment and increase competitiveness, manufacturing companies have to continuously eliminate their wasteful factors through an efficient process analysis, improve quality of products, increase the flexibility of manufacturing processes. In this paper, we consider a case study for the Shanghai New Auto which is a subcontractor of MOBIS in China, to improve productivity by using therblig method, one of the motion analysis, to minimize the work-in-process inventories and to shorten the manufacturing cycle times. We also try to relocate the facility layout to increase the efficiency and flexibility of manufacturing processes.

This paper addresses the facility layout problem in multi-bay environments, where the bays are connected at one or both ends by an inter-bay material handling system In most previous studies, the main concern is to allocate facilities or departments to th

Semiconductor industry is based on equipment industry and timing industry. In particular, semiconductor process is very complex and as semiconductor-chip width tails and is becoming equipment gradually more as a high technology. Equipment operation is primarily engaged in semiconductor manufacturing (engineers and operator) of being conducted by, equipment errors have also been raised. Equipment operational data related to the error of korea occupational safety and health agency were based on data and production engineers involved in the operator's questionnaire was drawn through the error factor. Equipment operating in the error factor of 9 big item and 36 detail item detailed argument based on the errors down, and 9 big item the equipment during operation of the correlation error factor was conducted. Each of the significance level was correlated with the tabulation and analysis. Using the maximum correlation coefficient, the correlation between the error factors to derive the relationship between factors were analyzed. Facility operating with the analysis of error factors (big and detail item) derive a relationship between the model saw. The end of the operation of the facility in operation on the part of the two factors appeared as prevention. Safety aspects and ergonomics aspects of the approach should be guided to the conclusion.

본 연구는 온실 운영에 필요한 전력량을 확보함으로서 온실경영비 절감을 목적으로 우선 태양광발전시스템을 온실의 인접한 건물의 옥상에 설치하여 기상상태에 따른 발전량을 실험적으로 검토하였다. 연구결과를 요약하면 다음과 같다. 실험기간 동안 최고, 평균 및 최저온도는 각각 0.4~34.1, -6.1~22.2 및 -14.1~16.7℃ 정도의 범위에 있었다. 그리고 일사량의 경우, 최대, 평균 및 최저값은 각각 28.8MJ·m-2, 14.9MJ·m-2 및 0.6MJ·m-2 정도였고, 전력은 일사량에 비례해서 증가하지 않고 약 750W 전후에서 거의 일정한 것을 알 수 있었다. 일일 최대, 평균 및 최소 소비전력량은 각각 약 5.2kWh, 2.5kWh및 0kWh정도였다. 본 실험에 사용된 시스템의 평균 소비전력량을 기준으로 보면, 온풍기의 용량 및 작동시간이 작은 경우는 충분하지만 큰 경우는 부족한 것으로 나타났다. 온풍기의 용량이 큰 경우, 어레이 면적이 현재의 약 3배인 약 21m2 정도이면 평균 전력량으로 충분할 것으로 판단되었다. 물론 어레이의 온도가 높아지는 한 여름철에는 일사량에 비례해서 발생 전력이 증가하지 않은 것으로 나타났지만, 현재까지 실험결과로 보면, 두 인자간에 상관계수가 0.84 정도로 상관관계가 높은 것으로 나타났다.

The numerical calculation was carried out using OmniCADDⓇ HCS Hydraulic Calculation Software to certify if flow velocities in pipes reduced in diameter were satisfied with fire codes for a dry system of underground parking area in apartment complex. The design pressure and flow rate for the dry system were 4.3 bar and 1633.8 lpm. The maximum discharge pressure and flow rate of sprinklers were 2.2 bar and 118.2 lpm. The maximum flow velocities in main pipe, branch line and other pipe of the dry system were 1.5 m/s, 5.0 m/s and 3.5 m/s. The design propriety could be clearly certified by satisfying with fire codes related to flow velocities for the pipe network of the dry system.

Estimation of mortality behavior of a industrial property are useful for calculating depreciation and making management decisions relating to property. The common methods of computing depreciation require an estimation of service life, and some methods ma

This paper considers a multiagent scheduling problem under public information where a machine is shared by multiple agents. Each agent has a local objective among the minimization of total completion time and the minimization of maximum. In this problem.