This paper presents a method to reduce the cost of the conventional gel documentation system by employing a much cheaper digital camera instead of the existing expensive one. To adapt the cheaper camera, a computer remote control function which is necessary to the gel document system was added. The gel imaging performance of the camera was qualitatively and quantitatively analyzed in comparison...

We describe an extended bidiagonalization scheme designed to compute low-rank approximations of very large data matrices. Its goal is identical to that of the truncated singular value decomposition, but it is significantly cheaper. It consists in an extension of the standard Lanczos bidiagonalization that improves its approximation capabilities, while keeping the computational cost reasonable. ...

This article adresses the topological design problem of access networks. The topology of such networks is often designed assuming capacity-independent costs for the links and neglecting other equipment costs. However, with the massive deployment of optical fiber in all western countries, the cost of leasing transmission lines becomes cheaper and cheaper, and equipment costs are now a significan...

We consider a two-period airline yield management problem where customers may act strategically. Specifically, we allow for the possibility that a customer may decide to defer purchase in the hope that a ticket cheaper than those currently on offer will become available. We also allow for the possibility that some customers will buy a more expensive ticket if the cheaper tickets are not availab...

Yearly sales of “fair trade” products exceeds $2.3 billion worldwide. Consumers who are altruistic and rational will choose these product-donation bundles when the bundle is cheaper than its elements. Assume a supplier’s investment reduces retailers’ costs (or improves quality), but this investment is non-verifiable, hence sub-optimal even with infinitely-repeated interaction. A retailer paying...