A repetitive sequence collection is one where portions of a base sequence of length n are repeated many times with small variations, forming a collection of total length N . Examples of such collections are version control data and genome sequences of individuals, where the differences can be expressed by lists of basic edit operations. Flexible and efficient data analysis on a such typically h...

Large-scale scientific experiments or simulation programs often generate large amounts of multidimensional data. Data volume may reach hundreds of terabytes (up to petabytes). In the present and the near future, the only practicable way for storing such large volumes of multidimensional data is tertiary storage systems. But commercial (multidimensional) database systems are optimized for perfor...

The proliferation of large data repositories inspires continuing interest in storage systems and organization. This paper describes basic principles and architecture of a new prototype system for data storage and retrieval, called D*, which is designed to support advanced scientific studies in Data Grid environments. Unlike typical storage systems, the D* system enables a tighter integration of...

Large-scale scientific experiments or simulation programs often generate large amounts of multidimensional data. Data volume may reach hundreds of terabytes (up to petabytes). In the present and the near future, the only practicable way for storing such large volumes of multidimensional data are tertiary storage systems. But commercial (multidimensional) database systems are optimized for perfo...

We consider the problem of scheduling the storage and retrieval of containers in the storage area of a container terminal. Some arcs in the underlying directed network must be visited; other arcs may but need not be visited. We can, therefore, consider this problem to be a special case of the directed Rural Postman Problem. We show that this problem can be reformulated as an asymmetric Steiner ...

Multi shuttle automated storage retrieval systems have been developed for use in factories and distribution centers since they are more e cient than single shuttle systems due to less empty travel This improved e ciency results in more agile support exible response less waiting time etc for the production system the storage retrieval system serves In this paper we develop analytical models to e...

Semantic Web, Jena, database, RDF, SQL RDF and related Semantic Web technologies have been the recent focus of much research activity. This work has led to new specifications for RDF and OWL. However, efficient implementations of these standards are needed to realize the vision of a world-wide semantic Web. In particular, implementations that scale to large, enterprise-class data sets are requi...

Storage and retrieval of a squeezed vacuum was successfully demonstrated using electromagnetically induced transparency. The squeezed vacuum pulse having a temporal width of 930 ns was incident on the laser cooled 87Rb atoms with an intense control light in a coherent state. When the squeezed vacuum pulse was slowed and spatially compressed in the cold atoms, the control light was switched off....