File systems store, organize, and retrieve data for users and often these files are stored on remote machines, or removable media. The UNIX system requires that these file systems must be mounted before files can be accessed. In network environments, mounted file systems can result in extra traffic, even when the file system is mounted, but no files are used. This extra traffic is undesirable, ...

Caching is technique that alleviates networks during peak hours by transmitting partial information before a request for any is made. We study this method in a lossy source coding setting with Gaussian databases. A good caching strategy minimizes the data still needed on average once the user requests a file. We identify two important parameters: the prior preference for a file and the correlat...

Recently, peer-to-peer applications have become very popular in the Internet. In most cases they are used for file sharing purposes, like the exchange of MP3 files introduced by Napster [1] and evolved by its successors (e.g. Gnutella [2]). The mechanisms these applications are based on work fine for file sharing due to the elastic traffic characteristics. This is not the case for on-demand vid...

Pangaea is a wide-area file system that enables ad-hoc collaboration in multi-national corporations or in distributed groups of users. This paper describes Pangaea’s approach for keeping the file-system’s name space consistent and proves its correctness. Maintaining the name space is a simple matter in traditional file systems that store the entire volume in a single node. It is not so in Panga...

A computer system uses several serial files. The files reside on a direct-access storage device in which storage space is limited. Records are added to the files either by jobs in batch processing mode, or by on-line transactions. Each transaction (or job) generates a demand vector which designates the space required in each file for record addition. Whenever one file runs out of space, the sys...

As the demand for multimedia grows, the development of information retrieval systems including information about music is of increasing concern. Radio stations and music TV channels hold archives of millions of music tapes. Gigabytes of music files are also spread over the web. To automate searching and organizing the music files based on their genre is a challenging task. In this report, we pr...

Large file transfers have become common with the increasing demand for bandwidth-intensive Internet applications. The transmission control protocol with adaptive delay and loss response algorithm (TCPADaLR) was proposed to improve TCP performance in the presence of large propagation delays and error losses. In this paper, we analyze the effect of transfer file size on the TCP-ADaLR performance ...

introduction: the aim of this in vitro study was to evaluate the effect(s) of three canal lubricants i.e. sodium hypochlorite, rc-prep as the paste form of ethylenediaminetetraacetic acid (edta) and aqueous edta, on the occurrence/incidence of fracture, deformity and metal slivering of protaper rotary instruments. methods: a total of 120 mesial canals ( i.e. mesiobuccal and mesiolingual) of fir...

Search engines such as Google and MSN Search crawl and index files in Adobe’s Portable Document Format (PDF) alongside material in HTML. Google furthermore offers a View as HTML option for PDF that includes query term highlighting. The visual appearance of these HTML files converted from PDF is very poor. In this paper we claim that significant improvements to the quality of on-demand PDF to HT...

abstract— data grids are an important branch of gird computing which provide mechanisms for the management of large volumes of distributed data. energy efficiency has recently emerged as a hot topic in large distributed systems. the development of computing systems is traditionally focused on performance improvements driven by the demand of client's applications in scientific and business ...