9,606 research outputs found
Analysis of Costs and Benefits of compressing data on the Usenet
No full textUSENET traffic occupies a growing volume of data communications capacity, several gigabits per day is common for the popular newsgroups. The news servers storing the messages and files devote a correspondingly large amount of disc space. The prevalent standard for newsgroup traffic is the Network News Transfer Protocol (NNTP) which deals with text that is uncompressed. This lack of compression represents a significant waste of resources on communications links and data storage space on the Internet. To analyse costs and benefits of compressing newsgroup traffic we installed and executed compression and decompression software under controlled conditions on the Internet. Using real newsgroup traffic generated by the population of subscribers in a typical Intranet, we found significant increases in the efficiency of data communications between the news clients and news servers. In some cases useful traffic increased by 30% on the data links. Also the occupancy of data storage on the news servers was more efficient with generally 30% and in some cases 40% more useful data stored in the equivalent disc space . In general the improvements in system performance depended on the characteristics of the newsgroup traffic being compressed and decompressed. In particular the average length of the messages in the newsgroup traffic determined the potential performance improvements. Traffic with a higher average message length enjoyed a higher increase in efficiency. We compared the two compression algorithms and discovered that their relative performance depended on the characteristics of the newsgroup traffic. Zlib is more effective than Bzip2 for large text files whereas Bzip2 is more effective than Zlib for traffic comprising shorter messages. We investigated the effect of the Zlib dictionary on the effectiveness of our system and found that the performance of Zlib is very dependent on the dictionary used to initialise the compressor. When a simple dictionary is used an increase in compression from 30% to 40% is achieved on sample data. We found that the nature of the optimum dictionary varied between newsgroups because of differing word patterns in each newsgroup's traffic. An implementation comprising multiple dictionaries is therefore the key to optimum performance by Zlib and further work is needed to investigate this approach. For the current investigation we created an NNTP proxy server program which allows unmodified newsreaders to access and create compressed messages. We then used the system for the reported performance evaluations. A second objective of our architecture was to facilitate the adoption of the system across the Internet as an ancillary to NNTP. We have defined our classes in Java thus making them available to writers of Java news readers. We have conceived, built and used an effective compression and decompression system for newsgroup traffic. Our system is compatible with the NNTP standard and with the current architectural infrastructure of news servers and clients. The results of our analysis of data compression under controlled USENET usage indicate that the design approach is widely applicable. Similar implementations on local Intranets could lead to widespread efficiencies in data storage and data transmission
Charlie May Simon materials
No full textThis collection contains materials relating to Arkansas author Charlie May Simon
Simon Nyakot
Get PDFabstract: Simon Nyakot left his village when he was six years old.
“Lost Boys Found” is an ongoing, interdisciplinary project that is collecting, recording and archiving the oral histories of the Lost Boys/Girls of Sudan. The collection is a work-in-progress, seeking to record the oral history of as many Lost Boys/Girls as are willing, and will be used in a future book.Age: 27Region: LakeThis picture and bio was donated to the Lost Boys Found project from The Arizona Lost Boys Cente
Cahiers Saint-Simon
No full texthttps://www.persee.fr/renderCollectionCover/simon.pngThe Société Saint-Simon was founded in 1972 in order to promote studies about the Duke of Saint-Simon (1675-1755), namely about the work, life, and thinking of the Mémoires’s author. Each year it issues a Cahier Saint-Simon. It contains the Acts of the annual Journée d’étude in Versailles, but also Notes and Documents, News of the Society and Book reviews.Fondée en 1972, la Société Saint-Simon a pour but de développer les études concernant l'oeuvre, la personne et la pensée du duc de Saint-Simon (1675-1755), l’auteur des Mémoires. Chaque année, paraît un numéro de Cahiers Saint-Simon contenant les actes de la journée annuelle de Versailles, ainsi que des Mélanges, des Notes et Documents et une Chronique bibliographique détaillée
Cahiers Saint-Simon
No full texthttps://www.persee.fr/renderCollectionCover/simon.pngThe Société Saint-Simon was founded in 1972 in order to promote studies about the Duke of Saint-Simon (1675-1755), namely about the work, life, and thinking of the Mémoires’s author. Each year it issues a Cahier Saint-Simon. It contains the Acts of the annual Journée d’étude in Versailles, but also Notes and Documents, News of the Society and Book reviews.Fondée en 1972, la Société Saint-Simon a pour but de développer les études concernant l'oeuvre, la personne et la pensée du duc de Saint-Simon (1675-1755), l’auteur des Mémoires. Chaque année, paraît un numéro de Cahiers Saint-Simon contenant les actes de la journée annuelle de Versailles, ainsi que des Mélanges, des Notes et Documents et une Chronique bibliographique détaillée
Simon Weir - The Sydney Surrealist
No full textExhibition catalogue of "Simon Weir - The Sydney Surrealist", Exhibition at Disorder Gallery, Darlinghurst NSW, Australia, in April 2024. The catalogue contains images of exhibited works and statements by the artist Simon Weir, the gallery Director Elliott Cole, and author and journalist Margie Smithurst
Joan Simon Correspondence
Get PDFEntries include a typed biographical letter from Simon in New York, explaining her relationship to Maine for the purposes of presentation to the Maine Author Collection
Carlo Ferdinando Russo, Aristophanes, An Author for the Stage.
No full textByl Simon. Carlo Ferdinando Russo, Aristophanes, An Author for the Stage.. In: L'antiquité classique, Tome 65, 1996. p. 296
Carlo Ferdinando Russo, Aristophanes, An Author for the Stage.
No full textByl Simon. Carlo Ferdinando Russo, Aristophanes, An Author for the Stage.. In: L'antiquité classique, Tome 65, 1996. p. 296
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