In this paper, based on the finite element analysis model verified in previous studies, a new model of a buckling restrained brace reinforced with a steel plate was proposed. A design formula was proposed for the new model to dissipate energy without buckling the steel core under load protocol, and the performance of the model satisfying the design formula was evaluated by comparing it with the previous model through the results of hysteresis loop, bi-linear curve, cumulative energy dissipation capacity, and equivalent viscous damping.

In this paper, nonlinear finite element analysis was conducted based on the experimental results on buckling restrained brace. The reliability of the analytical model was verified by comparing the results of experimental studies with hysteresis loop, bi-linear curve, cumulative energy dissipation capacity, and equivalent viscous damping. A valid finite element model has been secured and will be used as basic data for finite element analysis of buckling restrained braces in the future.

Currently many companies are interested in reduction of the carbon emissions associated with their supply chain activities such as transportation and operations. Operational decisions, such as modifications in order quantities could an effective way in reducing carbon emissions in the supply chain. Cap-and-trade regulation, sometimes called emissions trading, is a market-based tool to limit greenhouse gas emissions. Under cap-and-trade regulation, emission credits are allocated to the firms and the firms trades emissions under cap-and-trade schemes. In this paper, we propose a single-manufacturer single-buyer two-echelon supply chain problem under the cap-and-trade mechanism incorporating the carbon emissions caused by transportation and warehousing activities where a single manufacturer produces a family of items in order to deliver a family of items to a single buyer at a fixed interval of time for effective implementation of Just-In-Time (JIT) Purchasing. An integrated multi-product lot-splitting model of facilitating multiple shipments in small lots between buyer and manufacturer is developed in a JIT Purchasing environment. Also, an iterative heuristic algorithm is developed to derive the common order interval, the number of intervals for each product and the number of shipments between the buyer and the manufacturer during the common interval. A numerical example is given to illustrate the savings in reduction of total cost and carbon emissions by the inventory model incorporating cap-and-trade mechanism compared to the classical inventory model. The proposed inventory model could be useful for the practical solution of two-echelon supply chain inventory problem under cap-and-trade mechanism.

In pursuing carbon emission reduction efforts, companies have focused for the most part on reducing emissions due to the more efficient equipment and facilities. However they overlook a significant source of carbon emissions, one that is driven by operational policies. Currently companies are looking for solutions to reduce carbon emissions associated with their operations. Operational adjustments, such as modifications in order quantities could an effective way in reducing carbon emissions in the supply chain. Also, Cap-and-Trade mechanism is generally accepted as on of the most effective market-based mechanism to reduce carbon emissions. In this paper, we investigate a supply chain with single manufacturer and multiple retailers multi-product inventory model under the cap-and-trade system incorporating the carbon emissions caused by transportation and warehousing activities. Also, we provide an iterative solution algorithm and derive the common order interval and the number of intervals for each product. We show by numerical example that the inventory model incorporating cap & trade mechanism can reduce total cost and carbon emissions compared to the classical inventory model. Using the numerical examples, we also investigates different carbon price on the performance of the inventory model.

In this paper, we investigate an inventory and production system in a three-layer supply chain system involving a single supplier, single manufacturer and multiple retailers. Earlier study in this type of supply chain only consider a single raw material in order to produce single item, but we consider raw materials in order to produce multiple items. It is assumed that the cycle time at each stage is an integer multiple of the adjacent downstream stage. We develop an iterative solution procedure to find the order quantity for the multiple items and raw materials that minimizes the supply chain-wide total cost per unit time of the supplier and manufacturer’s raw materials ordering and holding, setup and finished items holding, the retailer’s ordering and inventory holding. Numerical examples are presented to show that the proposed heuristic gives good performance.

최근 복숭아 과원에서 해마다 노린재가 지속적으로 많은 피해를 끼치고 있으며, 생육초기에는 장님노린재류의 발생이 많고 복숭아 생육후기에는 갈색날개노린재 와 썩덩나무노린재 등의 피해가 많은 경향이다. 톱다리개미허리노린재를 이용한 예찰에서는 해에따라 편차를 보이고 있는데 2012년도의 경우 초발시기가 4월 중순경이었으며, 2013년과 2014년에는 3월경 고온의 영향으로 초발시기기가 빨라져 2013년에는 4월 상순에 초발하여 일시적으 로 증가하다가 4월에 저온현상이 지속되어 본격적인 증가는 5월 상중순에 이루어 졌으며 2014년에는 3월 하순에 초발하여 4월부터 본격적으로 발생하였다. 한편 복숭아 과실에서 노린재의 흡즙 부위를 통해 각종 병해의 증가 원인이 되고 있는데, 복숭아 생육초기인 5~6월의 세균성구멍병과 중만생종 수확기의 잿빛무늬 병 발병에 많은 영향을 주고 있다. 2013년과 2014년에는 세균성구멍병의 발병이 크게 증가하였는데, 복숭아 생육 초기인 낙화 후부터 적과하기 전까지 노린재류 방제를 통해 유과기의 세균구멍병 을 75%정도 경감시키는 효과가 있었으며, 복숭아 성숙기부터 수확기까지 노린재 류 방제를 통해 잿빛무늬병을 39% 정도 경감시키는 효과가 있었다.

In this paper, we consider a single-manufacturer single-buyer supply chain problem where a single manufacturer purchases and processes raw materials into a family of items in order to deliver a family of items to a single buyer at a fixed interval of time for effective implementation of Just-In-Time Purchasing. An integrated multi-item lot-splitting model of facilitating multiple shipments in small lots between buyer and manufacturer is developed in a JIT Purchasing environment. Previous research on the integrated model assumed that the manufacturer orders raw materials m (integer) times for every production run (lot multiplier policy for the raw material). In this paper, we consider a generalized policy in the replenishment of raw materials, allowing lot multiplier policy and lot splitting policy. An iterative solution procedure is developed to find the order interval for finished goods and raw materials, and number of shipments between buyer and manufacturer. We show by numerical example that when the integrated policy is adopted by both buyer and manufacturer in a cooperative manner, both parties can benefit.

노린재류는 과수에서 가장 문제시되는 해충으로 알려져 있으며, 최근 복숭아 과원에서도 갈색날개노린재, 썩덩나무노린재, 톱다리개미허리노린재, 장님노린재류, 풀색노린재류 등 여러 종의 노린재류가 지속적으로 많은 피해를 끼치고 있다. 페로몬을 이용하여 청도, 경산, 영천등 경북지역에서 톱다리개미허리노린재의 예찰상황을 조사하였는데, 해에 따라 발생시기와 발생밀도의 차이를 보였다. 2010년도에는 초발시기가 5월상순경이었고, 후기에는 7월 중순부터 크게 증가하였으며, 2011년도의 경우 초발시기가 4월 중순경이었으며, 6월 이후에는 감소하다가 중만생종 수확기인 8월 이후에 크게 증가하였다. 2012년도에는 4월중순경부터 크게 증가하여 4월하순부터 5월상순까지 80~100마리/트랩 정도로 밀도가 높았으며, 8월 이후부터 9월중순경까지 밀도가 크게 증가하였다. 노린재류의 피해는 잎의 경우 4월 하순부터 발생하여 5월 중순까지 계속 증가하였으며, 장마기에 감소하다가 8월 상순경에 다시 증가하였고, 과실에서는 5월 중순부터 6월 중순까지와 8월 상순~중순경에 피해가 심하였다. 복숭아에는 노린재류에 대한 등록약제가 없어 농약직권 등록시험을 수행한 결과 디노테퓨란･에토펜프록스수화제 등 5종의 약제에서 방제 효과가 인정되었다. 한편 약제살포 시간대별 노린재류의 방제효과를 검토하기 위해 오전 7시부터 오후 7시까지 4가지로 구분하여 약제를 처리한 결과 오전 7시 처리구에서 가장 방제효과가 높았다.

In this paper, we investigate an inventory system where a single manufacturer purchases and processes raw materials in order to deliver finished goods to multiple retailers. Earlier study in this type of supply chain only consider a single raw material in

경북지역의 복숭아 주산지인 청도군, 영천시, 경산시 지역을 대상으로 2008 년~2010년 동안 복숭아순나방 성페로몬을 이용하여 예찰하고, 이에 근거하여 복 숭아순나방 피해 과원에 대해 교미교란제의 효과를 검토하였다. 페로몬트랩의 조사는 10일간격으로 하였으며, 설치된 루어의 교체는 약 6주 간 격으로 하였다. 복숭아순나방 방제를 위한 교미교란제의 설치는 도포형을 사용하 였으며 도포량은 120g/10a을 도포하였으며, 과원내부에 비해 가장자리에 20% 정 도를 많게 하였다. 복숭아 과원의 복숭아순나방 1화기 평균 발생최성기는 2010년에 5월상순으 로 2008년보다 10일정도 2009에 비해 20일정도 각각 늦어졌고, 발생밀도도 해에 따라 편차를 보였다. 교미교란제를 활용한 복숭아순나방 방제효과의 경우 성페로몬 예찰을 통한 성충유살수 조사에서는 교미교란제 처리 효과가 뚜렷하였으나, 피해순율과 피 해과율 조사에서는 교미교란제의 처리방식에 따라 차이를 보였다. 주위에 복 숭아 및 사과 등 복숭아순나방이 발생하는 과원이 인접해있는 곳에서는 효과 가 떨어졌으며, 독립된 과원이나 교미교란제를 대면적에 처리했을 경우 피해 순률이 3% 정도, 피해과율이 0.4% 정도로 방제효과가 높았다. 살충제 약제살포 횟수에서는 교미교란제 처리구에서 살충제 살포 횟수가 2 회정도 절감되었다.

In this paper, we consider a single-vendor single-buyer supply chain problem where a single vendor order raw materials from its supplier, then using its manufacturing processes converts the raw materials to finished goods in order to deliver finished good

  In this paper, we consider an inventory system where a single supplier purchases and processes raw materials into finished goods in order to deliver finished goods to a single buyer for effective implementation of Just-In-Time Purchasing. An integrated

  The purpose of this study is to propose guidelines for introducing the JIT(Just-In-Time) purchasing to enhance the competitiveness of Korean manufacturing companies. This study employed an extensive survey on the use of the JIT purchasing systems among

The purpose of this study is to propose guidelines for introducing the Just-In-Time (JIT) production system to enhance the competitiveness of Korean manufacturing companies. This study employed an extensive survey on the use of the JIT production systems

The purpose of this study is to propose guidelines for introducing the Just-In-Time (JIT) production system to enhance the competitiveness of Korean manufacturing companies. This study employed an extensive survey on the use of the JIT production systems among different korean manufacturing companies to understand the current status of the JIT production system in use and to identify the benefits from implementing JIT production system. The survey has covered 170 manufacturing companies of different sizes from various sectors of Korean industries including electronics, automobiles, machineries, and textiles. In conclusion, our research results support that the JIT production system would contribute to increase the manufacturing performances of Korean manufacturing companies through lower inventory level and increased quality level.

In this paper, we consider an integrated inventory system where a single supplier purchases and processes raw materials in order to deliver finished goods to a single buyer for effective implementation of Just-In-Time purchasing. An integrated JIT lot-spl

This paper address the Integrated inventory system for JIT purchasing where a single vendor purchases and processes raw-materials in order to deliver finished-items to buyer. A mathematical model and an iteration solution procedure is developed to find the order interval for each item and number of shipment between buyer and supplier simultaneously.

대부분의 진단용 방사선 장치는 엑스선을 사용하며, 엑스선은 다양한 에너지를 갖는 스펙트럼을 갖는다. 진단 영상에서 엑스선의 정량적 및 정성적 분석은 선량을 줄이면서 영상 화질을 유지하는데 필수적이다. 본 연구의 목적은 진단 영상에 사용되는 엑스선 스펙트럼을 몬테칼로 시뮬레이션으로 측정하는 것이다. 다양한 엑스선 에너지 스펙트럼이 몬테칼로 시뮬레이션으로 측정되었다. 이 스펙트럼들은 다항식을 보간 한 양극 텅스텐 모델에 의해 계산된 결과와 비교하였다. 엑스선 관전압은 50, 60, 80, 100, 110 kV 였다. 검출기로는 카드뮴 텔루라이드와 비정질 셀레늄 물질을 사용하였다. 엑스선 에너지 스펙트럼의 시뮬레이션 결과는 참조 결과와 일치하였고, NRMSD 값은 최소 1.1%에서 최대 5.7%를 보였다. 시뮬레이션 결과에 의하면 진단 영상을 획득할 때 적절한 관전압의 선택을 가능하게 할 것이다. 또한, 영상 획득 전 환자에 전달되는 선량을 예측하는데 기여할 것이다.