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28617911-Web-Crawler There are important characteristics of the Web that make crawling very difficult: Its large volume, Its fast rate of change, and Dynamic page generation.These characteristics combine to produce a wide variety of possible crawlable URLs.The large volume implies that the crawler can only download a fraction of the Web pages withina given time, so it needs to prioritize its downloads. The high rate of change implies that by thetime the crawler is downloading the last pages from a site, it is very likely that new pages have been added to the site, or that pages have already been updated or even deleted.The number of pages being generated by server-side software has also made it difficult for webcrawlers to avoid retrieving duplicate content. a selection policy that states which pages to download, a re-visit policy that states when to check for changes to the pages, a politeness policy that states how to avoid overloading Web sites, and 1.4.1 Selection policy
Liberating Structures - Introduction Cancer the secret weapon? It was a case destined for the X-Files and conspiracy theorists alike, when Venezuelan president Hugo Chavez speculated that the US might have developed a way to weaponise cancer, after several Latin American leaders were diagnosed with the disease. The list includes former Argentine president, Nestor Kirchner (colon cancer) Brazil’s president Dilma Rousseff (lymphoma cancer), her predecessor Luiz Inacio Lula da Silva (throat cancer), Chavez (undisclosed), former Cuban president Fidel Castro (stomach cancer) Bolivian president, Evo Morales (nasal cancer) and Paraguayan president Fernando Lugo (lymphoma cancer). What do they have in common besides cancer? All of them are left-wing leaders. “Would it be so strange that they’ve invented the technology to spread cancer and we won’t know about it for 50 years?” Unsolved mysteries Sounds far-fetched? If the shoe fit... Bob Marley died of melanoma cancer in 1981. The cause of death was listed as a result of a massive heart attack.
Ultimate Review List of Best Free Online Storage and Backup Application Services The past several weeks I’ve been scouring the web in search of the best online storage, backup, and sharing services and applications. I have personally investigated and reviewed each and every one of these listed below. If you believe I have left an important one out of the list please let me know by commenting at the end of this article and I will review it for inclusion. In addition, if you work for one of the service providers listed below and any of the information (features, pricing, etc.) becomes outdated please bring this to my attention by commenting on this post using your work email (yourname@nameofserviceprovider) and I will personally update the information so it is current and accurate. Compare Best Online Storage and Backup Services Mozy – The most simple and one of the best automatic secure backup utility services for individuals, businesses, and enterprises. Carbonite – Mozy’s primary competitor, offers a 15-day free trial for unlimited backup of your data.
Prudens Information Resources for the Internet (PIRI) Home Page How to start your life over from scratch? If you had to walk away from your life in a split second, how would you start over? Writing a short story about a character who has to leave everything behind in his life with no prior warning. Literally set up as walking down a street and sees "x event" (something from his past) and realizes that everything associated with his current identity is compromised. Consider he has no wish other than to get away undetected and set up a new identity from scratch with only the clothes on his back and the twenty odd dollars in his pocket. I'm struggling with how my character can accomplish this. For the sake of argument (and those who might want to play with the narrative) assume this person is male, between 27 and 37, college educated, middle class suburban/ urban upbringing and would be trying to fit back into that cross section of society.
YAGO - D5: Databases and Information Systems (Max-Planck-Institut für Informatik) Overview YAGO is a huge semantic knowledge base, derived from Wikipedia WordNet and GeoNames. Currently, YAGO has knowledge of more than 10 million entities (like persons, organizations, cities, etc.) and contains more than 120 million facts about these entities. YAGO is special in several ways: The accuracy of YAGO has been manually evaluated, proving a confirmed accuracy of 95%. YAGO is developed jointly with the DBWeb group at Télécom ParisTech University.
Ajoutée le 27 oct. 2012
Documentaires Informatique
D'un côté, il y a les "black hats" (chapeaux noirs), les délinquants virtuels mus par l'appât du gain ; de l'autre, les "white hats" (chapeaux blancs) ou pirates bienveillants. Les hackers forment une vaste communauté aux profils diversifiés. Capables de modifier la une d'un journal sur le Net ou de piéger le ministre de l'Intérieur, ils sont aussi les seuls à savoir protéger les entreprises des menaces informatiques. Inventeurs des logiciels libres - permettant d'échapper à la toute-puissance de Bill Gates ou de Steve Jobs -, ils sont aussi, grâce à l'exploration des failles informatiques, à l'origine de la sécurisation des achats en ligne. Beaucoup n'ont qu'un bac en poche mais les services secrets et les responsables politiques se disputent leurs faveurs...
À contre-courant des idées reçues, ce film raconte la génération hackers, entrée dans l'arène politique et médiatique à l'occasion du débat sur Hadopi. by lavieapreslavie Nov 24