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Transcript of Web searching
1August 23, 2009
Use of the Internet (web searching) and it’s tools/technologies for teaching / learning activities
Binod Kumar Yadav Senior Librarian Central Library, BPKIHS
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Objective of the programme
To build the capacity to enable the participants for effective web searching (Internet).
To use the tools (Internet technologies) for professional and personal benefit.
To access to quality information.
To optimize the use of the resources.
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Topics
Overview of the Internet Web searching techniques Evaluation of the resources Web 2.0 concepts
• Social bookmarking: Del.icio.us, connotea, citeUlike etc.• Wiki• Blogs• RSS• Forum
Demo
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Overview of the Internet
-Is a network of networks within which all devices communicate via the TCP/IP protocol suite
- No one run the Internet, like a cooperative.
- Open architecture (anyone can connect up and use it.
- So, it is a worldwide network of computer networks that use the TCP/IP network protocols to facilitate data transmission
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Overview of the Internet contd…
Three levels:-
1. A physical network- it is a world wide network.
- Every device connected to the Internet has an Internet address: i. The numeric IP address, valid from 0.0.0.0 to 255.255.255.255 e.g. 131.118.80.1 124.108.120.31 (www.mail.yahoo.com) 64.233.181.99 or 147 (www.google.com)
ii. The text address- Uniform Resource locator (URL), e.g. www.frostburg.edu
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The Internet…
2. A collection of protocols
3. An ever increasing, conceptual network of Internet resources accessed by Internet services
i. Communication services: - Email - Forum, Electronic bulletin boards and newsgroups
- Mailing lists: allow to subscribe mass communication on a specific subject - Chat/ IM ii. Resource access services
- File transfer, Remote login iii. Information retrieval - www: information retrieval system
- Gopher ( Go for Information on the Internet) - WAIS ( Wide Area Information System)
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Web Searching Techniques
Why? It’s a challenge
Vast amount of resources
No organisation
No direct searching
Coverage of search tools very limited
Sites come and go
constant change
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Web Searching Techniques contd..
We should know the techniques-
to access to relevant information,
to get the recall (unwanted) less and precise (relevant) information more, and
familiar with various techniques that the Search engine such as Google, Yahoo, Altavista, pubmed etc. used.
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Web Searching Techniques contd…
Problems
How can I make my search more specific?I can’t see why
I’m getting these results!
Most of the sites I retrieve aren’t relevant to my query
Too much information I can’t find the useful
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Web Searching Techniques contd…
Some tips:
Specify your search terms Use professional terms Use the keywords from standard tools- SLSH, LCSH,
MeSH and others Use lowercase letters Ignore preposition, article and other stop words Read the searching guideline of the particular
databases
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Web Searching Techniques contd…
A. Formulation of query statements Exact wording or phrase- by surrounding terms with quotes e.g. “human swine influenza”
File format e.g. “human swine influenza” :filetype:ppt ,, :pdf
filetype:ppt site:edu “global warming”
Website or domain e.g. site:edu “b. p. koirala” site:bpkihs.edu “contact”
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Web Searching Techniques contd…
Webpage title e.g. intitle: b. p. koirala allintitle:abcdef
Definition e.g. define: swine influenza
Specific website or whole class of sites
e.g. "mbbs curriculum":site:edu
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No space
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Space
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Web Searching Techniques contd…
B. Use of Boolean operators
(AND, OR, NOT)
C. Truncation
e.g. epidem*
D. Nested searching
e.g. history AND (war or peace)
e.g. (swine OR H1N1) AND (flu OR influenza OR virus OR
pandemic)
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Boolean operators
AND- retrieves only records containing both terms. e.g. War AND peace
OR- retrieves records containing either one or more terms
NOT- exclude records containing the second term
e.g. war NOT peace
peace
war
War
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Evaluation of the Internet Resources
Why and how can we evaluate the resources?
Because:
- Anyone can put up a webpage
- Many sites are not updated
- No quality control
- Most sites not “peer-reviewed”
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Evaluation contd.
Is it someone’s personal page? Look for personal name following a tilde(~) or percentage sign (%)
Is the server commercial? e.g. geocities.com
What type of domain does it come from? ( educational, non-profit, commercial, government etc.) Look the domain extension: .gov, .edu., .mil, .org
Is it current and updated? Look for last updated
What are the author’s credentials on this subject?
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Evaluation contd.
Quality information
Look for indicators such as links, related links, reference whether
scholarly or not.
Use www.alexa.com ( web information company)
( type URL in the search box)
- to know the traffic details, ownership for domain name, sites that link
to the page and others
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Web 2.0
- Term coined in the year 2004 by Tim O’Reilly
- refers to 2nd generation of Internet service
such as social networking, wiki, blog etc.
- Allows to interact and customize information over cyberspace
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Web 2.0: Evolution Towards a Read/Write Platform
Companies Communities HTML XML
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Web 2.0 concepts
Social - shared, open collection, browsable, linkable
Participative - massively multi-user, web-based applications
Tagging - organize/ categorize with keywords
- flat, non-hierarchical
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Web 2.0 contd…
Web tools :-
A. Social book marking
-effective tool for teaching/ learning activities
B. Blogs
C. Wiki
D. RSS/ Forum/ alerting services
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A. Social Book marking
-Founded by Joshu Schachter in 2003
- It is a practice of saving book mark to a public website & tagging
them with keywords
- These are just annotated URLs
Uses Accessibility - web based storage
Organisation - keyword/ tagging
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Social Book marking contd…
Collaboration - students, friends, professional community etc.
Assignment- to consult book marked resource
Same sources for further use
Keep tract on the new development
Personal archive
Privacy
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Social Book marking Vs favorite
save on the Internet Only in one computer
i.e. Millions of computers
Tagged resources will No such facility, added
remain same even if resource deleted ones
the website changes system get formatted.
Tagged resources shared Not shared
Access by anybody at anytime Inaccessible from
From anywhere remote location
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Social Book marking contd.
Example:- Connotea (a free online reference management service for scientists,
researchers, and clinicians. It facilitates to organise, share and discover the online resources.)
- citeUlike (a free service for managing & discovering scholarly references. It
helps to store, share and discover new articles and resources)
- FURL : we can archive entire WebPages
- Del.icio.us
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Delicious
-It is a social bookmarking service that allows users to tag, save, manage and share resources on the Internet.
- Integrative approach to sharing, teaching and learning.
Delicious
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Delicious contd…
Why should we use social book marking?
We have already discussed for the need of it.
Generally, we come across the problem like:-Unable to access relevant resources.- difficult to access the same resources.
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Delicious contd…
What can we do?
Book mark any site on the Internet, and get to it from anywhere, at anytime and by anybody.
Share book marks and get book marks in return.
Store and discover the most useful book mark on the web
Install button in browser
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B. Blogs
- Web logs in short “blog”
- Named by John Barger
- These are web service that allow us to submit/ post our thoughts, events for others to read
- so, it is a way of conveying information instantly to the community/ world.
Example: Blogger, Livejournal etc.
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C. Wiki
- Ward Cunniggham invented in 1995
- It is a type of website that allows us to add and edit content and suited for constructive & collaborative authoring.
- Example: Wikipedia (a freely licensed, freely copy, encyclopedia contributed by thousand of volunteers & run by Wikimedia Foundation)
- good tool for collaborative assignments - http://wiki.ieee-earth.org
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D. Really Simple Syndication (RSS)
- Also known as Rich Site Summary
- Make easy for one website to include a list of headlines from another site i. e. syndication.
- Advantage:
i. Scan multiple sites from one place.
ii. Update itself with the latest items.
iii. Scan only feeds of interest
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Delicious login
Demonstration
Thank You