A flatbed scanner is used to collect a digital image of a polished cross-section through a concrete pavement. Image processing software is used to classify each pixel in the image as either cement paste, aggregate, or air void. The distance to the nearest air void is calculated for each pixel classified as cement paste using an accumulated cost surface algorithm. The presence of aggregate is ac...

It is the flow of capital services, instead of the capital stock, along with the flows of other inputs which is related to the flows of outputs in economic theory of cost and production. In applied research, quite often to capture the dynamic phenomena which occurs within a year, there is a need to use quarterly data which may not be captured by annual data. However, quarterly data on capital i...

With the increasing emphasis on data warehouse systems, the efficiency of complex analytical queries in such systems has become an important issue. Such queries posed challenging performance problems that initiated the use of parallel database systems and parallel algorithms in data warehouse environments. Many of these have been proposed in recent years but a review of the literature to our kn...

In this paper, we study and optimize the aggregate query processing in a highly distributed Cloud Data Warehouse, where each database stores a subset of relational data in a star-schema. Existing aggregate query processing algorithms focus on optimizing various query operations but give less importance to communication cost overhead (Two-phase algorithm). However, in cloud architectures, the co...

We relate burstiness (or indifference) curves for stochastic traffic flows to the quality they experience under the allocation of the resources of bandwidth and buffer space. We use this relation to explore the quality experienced by merged flows under various rules for allocating resources to them, including one motivated by the Controlled Load service specification. We show how cost structure...