Wireless sensor networks provide an effective tool for acquiring sensor measurements across a large area. Devices in a sensor field can automatically configure themselves into a working network, ready to collect data. The challenge is to collect that data in a timely and power-efficient manner. In some environments, a data collection device (sink) may need to travel periodically through the fie...

Relational Data Base Management Systems offer a commercially available tool with which to build effective document retrieval systems. The full potential of the relational model for supporting the kind of ad hoc inquiry characteristic of document retrieval has only recently been explored. In addition, commercially available relational DBMS’s also provide effective tools for managing document dat...

Tertiary storage systems are used when secondary storage can not satisfy the data storage requirements and/or it is a more cost effective option. The new application domains require on-demand retrieval of data from these devices. This paper investigates issues in optimizing I/O time for a query whose data resides on automated tertiary storage containing multiple storage devices.

Software component reuse is the use of existing software components to build a new software system. Effective storage and retrieval of software components is much essential in software components reuse process. The researchers have developed a number of software components reuse techniques for storage and retrieval of software components. No one technique is complete in its own; every technique...

To harness the ever growing capacity and decreasing cost of storage, providing an abstraction of dependable storage in the presence of crash-stop and Byzantine failures is compulsory. We propose a decentralized Reed Solomon coding mechanism with minimum communication overhead. Using a progressive data retrieval scheme, a data collector contacts only the necessary number of storage nodes needed ...

The low thermal conductivity of phase change material (PCM) leads to low heat storage/retrieval rates. The expanded graphite (EG) was used to enhance the thermal conductivity. EG/paraffin composite with the 7% mass fraction of EG was prepared as a good candidate for the latent thermal energy storage (LTES) system. A shell and tube LTES system built for room heating and hot water supply in a fam...

Introduction. To store information at extremely high-density and data-rate, we propose to adapt, integrate, and extend the techniques developed by chemists and molecular biologists for the purpose of manipulating biological and other macromolecules. In principle, volumetric densities in excess of 10 bits/cm can be achieved when individual molecules having dimensions below a nanometer or so are ...

Résumé : The sequencing of requests in an automated storage and retrieval system was the subject of many studies in literature. However, these studies assumed that the locations of items to be stored and retrieved are known and the sequencing problem consisted in determining a route of minimal travel time between these locations. In reality, for a retrieval request, an item can be in multiple l...