Basics of searching in free sources

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Internet - global information network[edit | edit source]

  • worldwide system of interconnected computer networks (the so-called "network of networks")
  • has no owner, no control centre that decides what, where and when is published on the network
  • the operation and further development of the Internet is handled by non-governmental organizations (ISOC - Internet Society, W3C - WWW Consortium)
  • it is free

History of the Internet[edit | edit source]

  • first vision of a computer network - 1946 in Murray Leinster's short story "A Logic named Joe"
  • originally developed for government and military purposes
  • 1969 - ARPANET - the first precursor - interconnecting 4 computer networks (USA)
  • 1972 - first e-mail program
  • 1973 - TCP (Transmission Control Protocol) - allows data transfer between networked computers (today - TCP/IP - a set of protocols for computer network communication)
  • 1987 - The Internet was born
  • 1989 - design of the development of the www and hypertext
  • 1994 - commercialization of the Internet
  • 2006 - 1 billion users

Basic Internet services[edit | edit source]

  • WWW
  • electronic mail
  • Instant messaging
  • FTP
  • VoIP (Voice over Internet Protocol)

Internet as an information resource[edit | edit source]

  • the selection of published information is not professionally edited or controlled
    • information is outdated, lacking dates of origin
    • poor quality, original source cannot be verified
    • no information on the origin of the source (original, adopted)

Web - visible x invisible[edit | edit source]

  • visible web (visible web, surface web) - freely searchable resources
  • invisible web (invisible web, deep web) - resources whose content is not accessible by standard search engines (they are invisible to them) - databases, password protected sites, unlinked websites

Visible Web Tools[edit | edit source]

Search Strategy Basics - Tips and Tricks[edit | edit source]

Search phrases, wildcards[edit | edit source]

  • quotes create a phrase
  • wild card symbols - ?, *, $

Boolean operators[edit | edit source]

  • AND' (= all of the words) - narrows the query
  • OR (= any of the words) - expands the query
  • NOT (= removes unwanted references)

Ex. Locks NOT ((security AND device) OR locking OR FAB OR entry OR door OR door OR keys)'

Proximity Operators[edit | edit source]

  • Specify the sequence or distance between search terms
  • NEAR' - specifies the maximum distance between words (e.g. x near/3 y → x and y will be max 3 words apart)
  • ADJ' (adjacent) - words next to each other, but no matter the order
  • Followed' by - words next to each other in the exact order

Free Information Resources - Medicine[edit | edit source]

Internet today - Web 2.0[edit | edit source]

  • The term describes the trends and new possibilities of the Internet
  • Term first used 2004 by Tim O'Reilly
  • Ross Mayfiled - "Web 1.0 was commerce, web 2.0 is people"
  • Users can do more than just get information

Earlier[edit | edit source]

  • web content is created by the owner
  • updates as the owner allows
  • there is no community - the visitor is a passive recipient of information

Internet today - Web 2.0[edit | edit source]

  • Visitors actively participate in content creation
  • Interaction required - through discussions, chat, personal profile
  • Web is a living organism - millions of content creators
  • Emergence of communities - interest, professional - personal profile creation
  • blogs, wiki systems
  • AJAX - changes the content of their pages without having to reload them (maps - zoom)
  • tagging, folksonomy
  • RSS - on-demand notifications of news on selected pages

Web 2.0 search engines[edit | edit source]

Links[edit | edit source]

Related articles[edit | edit source]

Resource[edit | edit source]

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