• 한국산업정보학회:학술대회논문집
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• 한국산업정보학회 1999년도 춘계학술대회 발표논문집
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• pp.145-153
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• 1999

We consider a Direct Input Output Manufacturing System(DIOMS) which has a munber of machine centers placed along a built-in Automated Storage/Retrieval System(AS/RS). The Storage/Retrieval (S/R) machine handles parts placed on pallets for the machine centers located at either one or both sides of the As/Rs. This report studies the operational aspect of DIOMS and determines the optimal operating policy by combining computer simulation and genetic algorithm. The operational problem includes: input sequencing control, dispatching rule of the S/R machine, machine center-based part type selection rule, and storage assignment policy. For each operating policy, several different policies are considered based on the known research results. In this report, using the computer simulation and genetic algorithm we suggest a method which gives the optimal configuration of operating policies within reasonable computation time.

• 한국환경보건학회지
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• 제22권3호
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• pp.88-97
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• 1996

This study was conducted to investigate the antitoxic effects of Pine Leaf extracts against cadmium toxicity. The experimental rats were divided into 5 groups, such as control group cadmium alone treatment group and simultaneous treatment groups of cadmium and three doses of Pine Leaf extracts. Each group was administered with different dose of Pine Leaf extracts such as 0.5 mg, 2.5 mg, 5.0 mg/kg wet weight in pallets for 12 weeks. Cadmium Chloride($CdCl_2$) was administered by 4 mg/kg body weight. The results were summarized as follows: The simultaneous administration of cadmium and Pine Leaf significantly more decreased cadmium concentration in liver tissues compared to the administration of cadmium only. When blood were measured, no significantly difference in haemoglobin, haematocrit, erythrocyte values compared to the administration of cadmium only, but RBC significantly more increased. The simultaneous administration of cadmium and Pine Leaf more no sigmificantly difference metallothionein concentration in liver than the administration of cadmium only. There were showed the histopathological slight changes in the liver and kidney tissues of rats.

• 대한산업공학회지
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• 제31권3호
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• pp.201-209
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• 2005

Empty moves are necessary when there are imbalances among transportation demands from source locations to destination locations and the transportation demands require empty equipment that must be supplied to source locations. When the amount of the inflow exceeds that of the outflow or the amount of the outflow exceeds that of the inflow, repositioning empty equipment is necessary. Examples of the empty equipment are containers, chassis, and pallets. This paper addresses how to estimate the empty moves on several typical transportation networks. Types of transportation networks considered are chain, tree, cycle, tree of cycles, and hybrid networks. Simple procedures are suggested for determining the optimal empty flows. Numerical examples are provided to illustrate procedures in this paper.

• 대한산업공학회지
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• 제34권4호
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• pp.470-480
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• 2008

Loading steel coil products on a specialized packing case called pallet can be represented as a bin-packing problem with the special constraint where objects should be loaded on designated positions of bins. In this paper, under assuming that there exist only two types of objects, we focus on finding the optimum number of positions in a bin which minimizes the number of bins needed for packing a collection of objects. Firstly, we propose a method to decide the number of positions and prove that the method is optimum. Finally, for the packing problem using bins designed by the method, we show that the well-known algorithm, First-Fit Decreasing(FFD), is the optimum algorithm.

• 대한안전경영과학회지
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• 제5권1호
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• pp.57-67
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• 2003

The logistics cost in Korea is very higher than that of the other countries. Thus, we propose to the way to reduce company's logistics cost in the paper industry. Each company in the paper industry is having its particular sized pallets and using them to manufactured products, store, deliver, retrieve empty pallet and so on. In this reason, the logistics cost is still increasing. As the common introduction of Pallet Pool System to "Paper Industry", the logistics cost could be reduced up to 24% and 1.8 billion won saved approximately, and it possibly attributes to the increase of company profit and the strength of the company competitiveness.itiveness.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2018년도 추계 학술논문 발표대회
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• pp.145-146
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• 2018

This study was performed to develop the lifting pallets for the application of smart skin system when remodeling the balcony of apartment house. For this purpose, the smart skin system based on IoT, combining window, BIPV, ESS, air purifier applied in this study was examined. The study developed and presented a foldable double pallet considering the load (about 2Ton) and specification (width 7m × height 2.6m × width 1.3m) of the smart skin system. In future research, it is necessary to verify the application of the foldable pallet in this study.

• 산업경영시스템학회지
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• 제22권53호
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• pp.89-97
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• 1999

We are concerned with the optimal design of flexible manufacturing cells in this study, thus try to suggest the detail information for each resource on the optimal conditions. Object oriented simulation technology is used to write models more easily and to execute simulation running time more rapidly, and the optimal level of relevant decision variables is probed by response surface methodology(RSM), which is well known for the optimization technology based on experiment design and regression equation. We investigate the optimal level for the number of pallets and the speed of AGVs of FMC systems, carry out the performance analysis of this system. Consequently we suggest systematic procedures for the optimization of FMCs in detail design stage.

• 한국신뢰성학회:학술대회논문집
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• 한국신뢰성학회 2006년도 학술발표대회 논문집
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• pp.149-157
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• 2006

에스컬레이터 스텝 및 수평보행기 팰릿의 가속수명시험 국제 기준인 5백만회 시험조건 및 하중조건의 등가 현장 수명에 대한 근거를 산출하였다. 업체 및 산기원의 시험 데이터로부터 Weibull 모델을 추정하여 분석한 결과 에스컬레이터 스텝 및 수평보행기 팰릿의 형상모수가 각각 2.4$\sim$2.6 및 2.7$\sim$2.8로 산출되었다. 이 형상모수를 이용하여 본 연구에서 대상으로 한 에스컬레이터 스텝 및 수평보행기 팰릿의 B$_{10}$ 수명이 각각의 목표 수명 7년과 6년을 보증할 수 있음을 확인하였다.

• 산업경영시스템학회지
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• 제30권4호
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• pp.111-117
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• 2007

Comparing with bar-code systems, RFID systems can supply more efficient work. Using RFID systems, logistic management systems could be helped effectively to gather real-time information. It's available to reduce the working time and object's delay time, and to deal with real-time information by using RFID system. Until now, based on how many pallets used, there is few study about best workload of RFID system. Therefore, in this study, both bar-code and RFID system simulations were executed for inspection process in distribution center. As a result, following the ware pallet quantity, the total cost of both working time and other delay times were calculated and the sensitivity analysis of total cost trend was executed.

• 대한산업공학회지
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• 제15권1호
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• pp.105-116
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• 1989

This study presents an algorithm that determines the optimal configuration of the FMSs with limited local buffers. The algorithm finds the lowest cost configuration, i.e. the number of tools, the number of pallets as well as the number of buffers to be installed in front of each machine in the system. Thus it assures a given production ratio with a minimum cost. In the algorithm, FMSs are considered as the closed queueing network with limited queue length. System performance evaluation is performed using the Block-&-Recirculation model developed by Yao and Buzacott. The algorithm is composed with three steps. The steps are namely i) determination of a lower configuration, ii) derivation of an heuristic solution, and iii) obtaining the optimal solution. The computational efforts required in the algorithm usually lies within the capability of personal computers.