Invisible Web: What it is, Why it exists, How to find it, and Its inherent ambiguity What is the "Invisible Web", a.k.a. the "Deep Web"? The "visible web" is what you can find using general web search engines. It's also what you see in almost all subject directories. The first version of this web page was written in 2000, when this topic was new and baffling to many web searchers. These types of pages used to be invisible but can now be found in most search engine results: Pages in non-HTML formats (pdf, Word, Excel, PowerPoint), now converted into HTML. Why isn't everything visible? There are still some hurdles search engine crawlers cannot leap. The Contents of Searchable Databases. How to Find the Invisible Web Simply think "databases" and keep your eyes open. Use Google and other search engines to locate searchable databases by searching a subject term and the word "database". Examples: plane crash database languages database toxic chemicals database Remember that the Invisible Web exists. The Ambiguity Inherent in the Invisible Web:
Web profond Un article de Wikipédia, l'encyclopédie libre. Ne doit pas être confondu avec darknet. Ne pas confondre[modifier | modifier le code] Ressources profondes[modifier | modifier le code] Les robots d'indexation sont des programmes utilisés par les moteurs de recherche pour parcourir le web. On peut classer les ressources du web profond dans une ou plusieurs des catégories suivantes : contenu dynamique ;contenu non lié ;contenu à accès limité ;contenu de script ;format non indexable. Voir aussi la section raisons de la non-indexation qui donne plus de précision. Taille[modifier | modifier le code] Une étude de juillet 2001 réalisée par l'entreprise BrightPlanet[1] estime que le web profond pouvait contenir 500 fois plus de ressources que le web indexé par les moteurs de recherche. En 2008, le web dit « invisible » non référencé par les moteurs de recherche représente 70 à 75 % de l'ensemble, soit environ un trilliard de pages non indexées[2]. Web opaque[modifier | modifier le code] Portail d’Internet
Christmas Gifts for Geeks Are you a geek? Do you know a geek? Perhaps you are a closet-geek ready to come out! Whatever your circumstance, Christmas is right around the corner, and your favorite geek or geek-to-be will need some pampering. If your geek has been very good all year, surely you should reward good behavior with a fabulous holiday surprise? Best Geek Gift #10: USB Watch Remember when Flash Drives on a lanyard were all the rage. DiskGo Watch Best Geek Gift #9: IP Address T-Shirt Behind all the names of the URLs of Internet websites are a series of numbers called IP (Internet Protocol) addresses. Best Geet Gift #8: The SEO White Hat " Whitehats” are website designers that "play nice" and follow all of the search engine rules set down by GOOGLE and the other search engines to optimize web sites. White Hat Best Geek Gift #7: Wi-Fi Detector T-Shirt How annoying is it to search for a Wi-Fi connection in a hotel lobby or airport, only to find out none exists. . Wi-Fi Detector T-Shirt
Web Data Harvesting: Web Scraping Software Web scraping software is an innovative tool that makes gathering lots of information relatively easy. The program has numerous implications for anyone who has the need to search for comparable information from various locations and put it into usable context. This method of finding extensive information in a short period of time is cost effective. Applications are used everyday for business, medicine, meteorology, government, and law enforcement. The software is user friendly and can be operated by anyone from non-tech data collectors to experienced Web designers. Programs are available for purchase in stores or online. A user enters the software and begins by programming an “agent”, this is the tool that will retrieve any and all information. Web scraping software provides customer information, marketing information, and competitor information. There have been legal ramifications as some have complained about intrusion and copyright infringement. Screen Scraper
50 Cool Search Engines for Serious Readers | Online Colleges The Internet has proven itself as a valuable resource for all types of readers, from collectors of rare books to tech-minded readers who shop, network and download books online. But if you’re having trouble finding exactly what you need, whether it’s a book review, a book by a certain author, or a digitized anthology for your class at an online college for creative writing, you’ll want to use sophisticated tools that direct you to high-quality resources. Here are 50 cool search engines for serious readers and students. For even more great search engines, read our updated list. eBooks When you want to read books online, use these search engines to find free versions, PDF files and .doc formats. Books to Swap, Sell and Buy Use these search engines when you need to swap, sell or buy a book over the Internet. Rare Books Collectors of rare, signed, and out-of-print books can use these search engines to help them complete their libraries. Book Reviews and Community Libraries
Dark Internet Causes[edit] Failures within the allocation of Internet resources due to the Internet's chaotic tendencies of growth and decay are a leading cause of dark address formation. One form of dark address is military sites on the archaic MILNET. These government networks are sometimes as old as the original ARPANET, and have simply not been incorporated into the Internet's evolving architecture. See also[edit] References[edit]
100 Perfect Gifts Whether You’ve Been Naughty or Nice: 1 to 10 | Product Reviews 100 Perfect Gifts Whether You’ve Been Naughty or Nice: 1 to 10 inShare0 Hario V60 Buono KettleThe perfect cup of joe is exactly 2 minutes, 30 seconds away: Hario's slow-pour kettle, coupled with its ridged conical drip cup ($23), prolongs infusion time for delicious solubles without overextracting your brew or straining your wrist. And while high-end coffee gear can cost as much as a new Toyota, the V60 goes for less than a few fill-ups. $59 | HarioPhoto: Massimo Gammacurta Joby Gorillatorch SwitchbackIf countless hours spent playing Zork taught us anything, it's that wandering around in the dark will get you eaten by a Grue. Sony RDP-X50iP BLK DockPortability isn't exactly synonymous with big, booming sound. Hario V60 Buono KettleThe perfect cup of joe is exactly 2 minutes, 30 seconds away: Hario's slow-pour kettle, coupled with its ridged conical drip cup ($23), prolongs infusion time for delicious solubles without overextracting your brew or straining your wrist.
Video search engine A video search engine is a web-based search engine which crawls the web for video content. Some video search engines parse externally hosted content while others allow content to be uploaded and hosted on their own servers. Some engines also allow users to search by video format type and by length of the clip. Search results are usually accompanied by a thumbnail view of the video. Video search engines are computer programs designed to find videos stored on digital devices, either through Internet servers or in storage units from the same computer. Utility[edit] The main use of these search engines is the increasing creation of audiovisual content and the need to manage it properly. Search criterion[edit] The search criterion used by each search engine depends on its nature and purpose of the searches. [edit] Metadata is information about facts. [edit] All video formats incorporate their own metadata. Video metadata [edit] Title and Description[edit] Filename[edit] Tags[edit] Frame Analysis[edit]
99 Resources to Research & Mine the Invisible Web College researchers often need more than Google and Wikipedia to get the job done. To find what you're looking for, it may be necessary to tap into the invisible web, the sites that don't get indexed by broad search engines. The following resources were designed to help you do just that, offering specialized search engines, directories, and more places to find the complex and obscure. Search Engines Whether you're looking for specific science research or business data, these search engines will point you in the right direction. Turbo10: On Turbo10, you'll be able to search more than 800 deep web search engines at a time. Databases Tap into these databases to access government information, business data, demographics, and beyond. GPOAccess: If you're looking for US government information, tap into this tool that searches multiple databases at a time. Catalogs If you're looking for something specific, but just don't know where to find it, these catalogs will offer some assistance. Directories
Web search query Types[edit] There are four broad categories that cover most web search queries:[1] Informational queries – Queries that cover a broad topic (e.g., colorado or trucks) for which there may be thousands of relevant results.Navigational queries – Queries that seek a single website or web page of a single entity (e.g., youtube or delta air lines).Transactional queries – Queries that reflect the intent of the user to perform a particular action, like purchasing a car or downloading a screen saver. Search engines often support a fourth type of query that is used far less frequently: Connectivity queries – Queries that report on the connectivity of the indexed web graph (e.g., Which links point to this URL? Characteristics[edit] A study of the same Excite query logs revealed that 19% of the queries contained a geographic term (e.g., place names, zip codes, geographic features, etc.).[4] Structured queries[edit] See also[edit] References[edit] Jump up ^ Christopher D.
10 Great Geeky Gifts - Top 10 Lists I’m proud to say that I am a geek, and I am an advocate for geeks and nerds everywhere. There is nothing wrong with having above average intelligence, a borderline unhealthy relationship with the internet and a taste for mayonnaise; celebrate your inner geek and for those with a special geek in their life, show them you appreciate every poorly defined muscle in their bodies. Geek-lovers, I know what you're thinking. I’ll buy them a subscription to New Scientist magazine, the latest Sims game or a non-Newtonian liquid to play with (A.K.A custard that becomes hard when force is applied); we’re geeks, we already have all that stuff. Don’t go for the default geek purchase; go for something really unusual and really geeky. Your nerdy champion will thank you for it...possibly with a poem full of factually correct sentiment. We have already had some space-aged geeky gifts, and next we have another with this space-aged ant farm. If you need an incentive to buy, watch this ? This is how they do it
Social Media Search Tool | WhosTalkin? Invisible web invisible Des moteurs comme Google, MSN/Live Search, Yahoo! Search ou des répertoires tels que Yahoo! Directory ne vous donnent accès qu'à une petite partie (inférieure à 10%) du web, le Web Visible. La technologie de ces moteurs conventionnels ne permet pas d'accéder à une zone immense du web, le Web Invisible, espace beaucoup plus important que le web visible. Lors d'une navigation en Antarctique pour prélever des échantillons de glace sur des icebergs, si vous vous limitez à leur partie émergée, vous vous privez de la surface immergée, en moyenne 50 fois plus importante. Sur le web, c'est la même chose ! > Une partie du web est non accessible aux moteurs parce que : • Les documents, pages et sites web ou bases de données sont trop volumineux pour être entièrement indexés. • des pages sont protégées par l'auteur (balise meta qui stoppe le robot). • les pages sont protégées avec une authentification par identifiant (login) et mot de passe.
How To Evaluate a Website - Basic Evaluation Checklist The Web has become the go-to source for many people doing all sorts of research these days. However, judging the truthfulness of information that you find online can be a bit problematic, especially if you’re looking for credible material you can cite in a research paper or academic project. Fiction and reality are not the same thing, but on the Web, it’s getting increasingly hard to tell the difference. To Cite or Not to Cite - That is the Question So how do you divide the wheat from the chaff? Who’s In Charge? Determining the authority of any particular site is especially vital if you’re planning on using it as a source for an academic paper or research project. Are You Telling Me The Truth? Eventually while you're on the Web, you will run into information that is not entirely true. Can I easily figure out who wrote the information? Are You Selling Me Something? Say for instance you’re researching power motor accidents. Is there an overwhelming bias in the information?