Caching is an effective mechanism for reducing bandwidth usage and alleviating server load. However, the use of caching entails a compromise between content freshness and refresh cost. An excessive refresh allows a high degree of content freshness at a greater cost of system resource. Conversely, a deficient refresh inhibits content freshness but saves the cost of resource usages. To address th...

Today’s mobile terminals have several access network interfaces. New protocols have been proposed during the last few years to enable the concurrent use of multiple access paths for data transmission. In practice, the use of different access technologies is subject to different interconnection costs, and mobile users have preferences on interfaces jointly depending on performance and cost facto...

Would slightly better performance be significantly more valuable from a market perspective? Would significantly better performance be just slightly more expensive to implement? When dealing with quality requirements, we often end up in a difficult trade-off analysis. Aspects such as release targets, end-user experience, and business opportunities must be taken into consideration. But when is th...

Time–cost trade-off problem is one of the main aspects of project scheduling. Due to variations in the real world, usually, risks in estimation of project parameters are considerably high. Therefore, use of uncertain models, which is capable of formulating vagueness in the real world, to solve time–cost trade-off problems, gives a scheduling with more stability against environmental variations....

A CCORDING TO RECENT POLLS, MANY AMERICANS CONsider health care reform the No. 1 domestic issue. 1 Presidential candidates, other politicians, health policy experts, labor leaders, business groups, and others have responded with numerous reform proposals. And somehow in the clamoring, health care reform has become equated exclusively with expanding coverage to the 47 million uninsured Americans...

Concern over information privacy is widespread and rising. However, prior research is silent about the value of information privacy and the benefit of privacy protection. We conducted a conjoint analysis to explore individuals’ trade-offs between the benefits and costs of providing personal information to Websites. We find that economic incentives (monetary reward and future convenience) do aff...

We present a novel treatment of the fundamental problem of erasing a bit. We propose a cost function that extends to path space the principle due to Szilard and Landauer that erasing a bit requires at least kBT log 2 units of energy. We introduce notions of reliability of information storage via a reliability timescale τr, and speed of erasing via an erasing timescale τe. Our problem formulatio...

As such, there is a growing emphasis upon the adoption of forAbstract mal decision-science methods to help us understand the qualA growing problem confronting users of remotely sensed imagery ity of our decisions, as opposed to the conventional standardsis whether the use of additional or different imagery to improve based approaches of the past where acceptable quality levels decision quality ...

This paper details our allocation for Built-in Self Test (BIST) technique used in the Interactive Design for Test reuse in Allocation for Testability (IDAT) tool. IDAT tool objective is to fullll the designer requirements regarding selected design and testability attributes of a circuit data-path to be synthesized. A related tool is used to synthesize a test controller for the nal testable circ...

We study the cost of improving the goodput, or the useful data rate, to user in a wireless network. We measure the cost in terms of number of base stations, which is highly correlated to the energy cost as well as capital and operational costs of a network provider. We show that increasing the available bandwidth, or throughput, may not necessarily lead to increase in goodput, particularly in l...