Transcript Slide 1

DEFINITIONS
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Search Engine
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Web Crawler
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A search engine is an information retrieval system
designed to help find information stored on a computer
system.
A Web crawler is a computer program that browses the
World Wide Web in a methodical, automated manner.
Metadata
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Metadata (meta data, meta-data, or sometimes meta
information) is “data about data.”
Source: Wikipedia
INTERNET SEARCHING
Characteristics
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Crawler-Based Search Engines
Crawler-based search engines, like Google, create their
listings automatically.
 They "crawl" or "spider" the web, then people search through
what they have found.
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Human-Powered Directories
A human-powered directory, such as the Open Directory,
depends on humans for its listings.
 You submit a short description to the directory for your entire
site, or editors write one for sites they review.
 A search looks for matches only in the descriptions submitted.
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Most all search engines use:
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Search results that contain exact phrasing
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Using the minus sign omits certain words
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*
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Using asterisk tells that you are looking for additional terms within that
search
 Toyota * will yield many different Toyota car and truck models
 Just 'Toyota' will return the official website and related pages.
or
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States that you want to search for one of two phrases
COMMANDS
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In Title: ____
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Telling Google to only return pages with the query
enclosed in the page title
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Site: ____
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useful when looking for jobs/products that are hard to come by
Search results only from the specified website
‘+’
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Yield results that definitely include the words after the
plus sign
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Toyota +News will yield only news stories about the car
manufacturer
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Advanced Searches
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Search within the results command
On the search results page, you can further narrow your search by
clicking the link 'Search Within the Results' towards the bottom of
the page. This enables you to enter another search term and only
look for matching results in the existing results.
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Microsoft Bing bought Yahoo Search
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Similar search grammar rules as Google
Suggested Search function
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Appears on the right of the suggestions gives you keywords and searches
related to your main search.
Yahoo Command ‘!’
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When you search a term, previous searches from other users will appear
below the text entry box.
Explore Concepts function
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Now use the same commands and rules
They do index and search the web differently
Will skip by the results page and go to the most relevant results first.
Similar to the “I’m feeling lucky” feature of Google
Bing
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Shows fewer results than Google
Hover your mouse over the results and can summon extra information.
Automatically detects your IP to provide relevant results
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Bing
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Shows fewer results than Google
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If it is certain it understand what you’re searching for
Hover your mouse over the results and you can
summon extra information.
 Automatically detects your IP to provide relevant results
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Best known people search engines
 Most useful
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Name
Email
Username
Phone
For people with a weak online presence or just a poplar name you may
have to sift through a lot of results until you find the one you're looking
for
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Fairly simple to search
Must sign in
8 main categories to
search
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People
Pages
Groups
Apps
Events
Web Pages
Keep searching simple
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People, Groups or
Organizations
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Professional social network
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Used to house portfolios
Great place to find people
 People
 Jobs
 Companies
 Answers
 Inbox
 Groups
Ultimate directory to find where people and
businesses are located.
 Pay a small fee to use
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Database of suspect telemarketers and scammers
who have often rang people before
 These numbers eventually become notorious and
are submitted to the database for all to be
warned.
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So if you get a suspect call, it may be worth a search.
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BitSnoop is a new Torrent search engine
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Different than other search engines
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It only returns results that have been filtered and checked for
bad links, missing or wrong content
BitTorrent is a peer-to-peer file sharing protocol
used for distributing large amounts of data.
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One of the most common protocols for transferring large
files, and it has been estimated that it accounts for
approximately 27-55% of all Internet traffic (depending
on geographical location) as of February 2009. (Wikipedia)
Specific niche
 World’s best resource of archives, information,
and document resources.
 Can search ‘Weather Ireland December 22, 1985
 Once you present your task in an objective
manner, it should be able to compute it
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Entering a complicated mathematical problem will
return a detailed answer with step-by-step actions to
solve it.
Excellent tool for students and people compiling
reports
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statistics, historical information, science and math answers
as well as everyday random facts
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RetailMeNot
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Coupon Codes, Printable Coupons and Grocery
Coupons
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Price Grabber
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databases stretches over 40,000 stores in almost every
western country including the US, UK, France, Holland,
Canada and some countries further afield such as India and
Australia.
Best price comparison website
Google Product Search
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Works in the same way as the regular search engine,
except that it caters specifically for products
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Flickr
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best bet if you want high quality photographs
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Tags are the main different between Flickr and other image
searches
Google Images
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offers images from all over the web
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very high resolution and worthy of a desktop wallpaper
Basic search works the same as the normal Google
 however you can tweak your results by using the sidebar options
Upload an image to search by instead of text
Creative Commons Search
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search for content all over the web that has a creative
commons license
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means you can use the image so long as you're not directly profiting
from it
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YouTube
Easily searchable
 Users upload
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Bing Video Search
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developing quite the repertoire for its video searching
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Similar to Yahoo and Google
TeacherTube
Educational friendly videos
 Downloadable with account
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Watch Know Learn
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Educational videos for k-12
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Blogs
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Job-Search-Engine
Yahoo Jobs
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Deezer
Songza
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Software
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Download.com
Flickr
PicItUp
Shopping
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eBay
Amazon
Images
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Vimeo
YouTube
Webshops
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Music
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IsoHunt
Video
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Jobs
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Google Books
Scribd
Torrents
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eBooks
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Regator.com
Books
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Retailmenot
Prices
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PriceGrabber
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Always keep the search terms broad to start
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then narrow it down if your subject isn't popular.
Don't use more terms than necessary
 Most search engines also act as converters.
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So by entering 500g in ounces, a special field towards
the top will give you a conversion with search results
displayed below.
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This works for all units such as currency, temperature,
weight, length etc...
By searching for a stock symbol (i.e. a code for a
particular company on the stock market) you'll be
returned with info relating to that company and
its shares.
 Current news stories will always be indexed first
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if you're searching for an old news story enter a date
after your search query.