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Describes how an LP‐based one‐dimensional packing algorithm can be used to minimise costs in three different multiple‐vehicle shipment planning problems. The three applications considered are: (1) shipping industrial trucks by container when weight is the dominant constraint; (2) shipping automotive parts in racks by truck when volume is the dominant constraint; and (3) shipping large rolls of paper in railcars of varying size with incentive rates when volume is the dominant constraint.
A recent article by Marien developed a linear programming model for determining the minimum cost pattern for purchasing and shipping commodities subject to a constraint in…
A recent article by Marien developed a linear programming model for determining the minimum cost pattern for purchasing and shipping commodities subject to a constraint in the level of service provided. The approach taken is first to describe the problem in terms of network theory. Although this is theoretically correct it leads to an unnecessarily complex discussion of what is basically a very simple problem. More importantly it leads to a mathematical model for the sample problem presented that has 23 constraints when only 4 are needed. This fact can be extremely important to anyone who is considering using the model on a “real” problem involving many more product‐shipment combinations. Following is an alternate representation of the problem in a form which lends itself much more readily to extension to larger problems and to matrix generation.
During the past ten years, product proliferation, the trend toward larger facilities serving more markets, dramatic increases in the cost of labour and of plant and…
During the past ten years, product proliferation, the trend toward larger facilities serving more markets, dramatic increases in the cost of labour and of plant and equipment and customers requiring faster, more dependable deliveries of smaller quantities have greatly increased management's awareness of the need for product flow planning and control. It is now well recognised that the movement and storage of goods is a vital link between production and marketing which is capable of having a significant impact on the overall profitability of the firm and, therefore, must be carefully planned and controlled.
Folding cartons are used in myriad consumer products. For some products, such as hair dye kits, a very high-resolution printing is required. This is typically done using a…
Folding cartons are used in myriad consumer products. For some products, such as hair dye kits, a very high-resolution printing is required. This is typically done using a technology known as Gravure printing. Gravure printing utilizes engraved cylinders which are very expensive. As a result, the printer often combines multiple products on one set of cylinders to minimize the total number of cylinders used. Since the demand between products varies, this can result in overproduction of the low demand products. This chapter presents an integer programming formulation that assigns products across multiple sets of cylinders in order to minimize this overproduction. Sample problems, their solutions and solution times are presented.
The purpose of this paper is to demonstrate how probabilistic simulation can be used to assist prospective general partners (GP) and limited partners (LP) of a venture…
The purpose of this paper is to demonstrate how probabilistic simulation can be used to assist prospective general partners (GP) and limited partners (LP) of a venture capital limited partnership fund to evaluate alternative investment strategies for the proposed fund. The model presented in the paper is based upon observed characteristics of the venture capital market reported in the finance, economics, and management science literature. The body of the paper is organized as follows. In Section II we review the structural characteristics of the model. In Section III we present the results, in terms of ending wealth, obtained from simulating the fund's operations over its life under selected alternative investment strategies. In Section IV we show evaluations of the fund's simulated results under expected return, mean/variance and four moment approaches. In Section V, we present conclusions and implications of the results for financial management.
The article by Mr. Brian J. Vaughan in the January issue of Scientific Lubrication, dealing with the chemical and theoretical qualities necessary in refrigerator oils, was of great interest to users of refrigerating machines, and these notes are submitted as a practical supplement to Mr. Vaughan's paper.
This chapter describes possible effects of the 2017 Endrew F. Supreme Court decision that raised the de minimus standard established in 1982 in Board of Education of the…
This chapter describes possible effects of the 2017 Endrew F. Supreme Court decision that raised the de minimus standard established in 1982 in Board of Education of the Hendrick Hudson School District v. Rowley. In Rowley, the court held school districts provided an appropriate education to students with disabilities by demonstrating that students' Individualized Education Programs (IEPs) are reasonably calculated to provide some educational benefit. In contrast, the Endrew F. decision requires IEPs to be reasonably calculated to provide progress that is appropriately ambitious in light of the child's circumstances. The implications of Endrew F. in the IEP process are delineated, including the importance of meaningful parent involvement; relevant and current statements of present levels of performance; challenging; ambitious and measurable goals; and frequent, systematic progress monitoring used to inform effective instructional changes that maximize student progress toward IEP goals. Finally, the authors discuss ways that Endrew F. may affect future litigation and that school districts may prepare to avoid possible litigation in the post-Endrew era.
This paper aims to explore the relationship between childhood, consumption and the Cold War in 1950s America and the Soviet Union. The author argues that Soviet and…
This paper aims to explore the relationship between childhood, consumption and the Cold War in 1950s America and the Soviet Union. The author argues that Soviet and American leaders, businessmen, and politicians worked hard to convince parents that buying things for their children offered the easiest way to raise good American and Soviet kids and to do their part in waging the economic battles of the Cold War. The author explores how consumption became a Cold War battleground in the late 1950s and suggests that the history of childhood and Cold War consumption alters the way we understand the conflict itself.
Archival research in the USA and the Russian Federation along with close readings of Soviet and American advertisements offer sources for understanding the global discourse of consumption in the 1950s and 1960s.
Leaders, advertisers, and propagandists in the Soviet Union and the USA used the same images in the same ways to sell the ethos of consumption to their populations. They did this to sell the Cold War, to bolster the status quo, and to make profits.
This paper offers a previously unexplored, transnational perspective on the role that consumption and the image of the child played in shaping the Cold War both domestically and abroad.
Lockheed's Dialorder: document delivery at last. “From the early days of online database searching, we knew we were only wetting the appetites of users for information,” Dr. Roger Summit of Lockheed told Online Review. “As never before possible, users could rapidly search for and find references on a practically limitless number of topics. But the user was then very often frustrated at his or her inability to locate the original document in any reasonably convenient and effective manner. We believe Dialorder will go a long way toward satisfying user needs.”