Web searching
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    Web searching Web searching Presentation Transcript

    • Use of the Internet (web searching)and it’s tools/technologies for teaching /learning activities Binod Kumar Yadav Senior Librarian Central Library, BPKIHS August 23, 2009 1
    • 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. August 23, 2009 2
    • 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 August 23, 2009 3
    • 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 August 23, 2009 4
    • 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 to e.g. (www.mail.yahoo.com) or 147 (www.google.com) ii. The text address- Uniform Resource locator (URL), e.g. www.frostburg.edu August 23, 2009 5
    • 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) August 23, 2009 6
    • 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 August 23, 2009 7
    • 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. August 23, 2009 8
    • Web Searching Techniques contd… Problems Too much Most of the information I can’t sites I retrieve find the useful aren’t relevant to my query How can I make my search more I can’t see why specific? I’m getting these results! August 23, 2009 9
    • 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 August 23, 2009 10
    • 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” August 23, 2009 11
    • 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 August 23, 2009 12
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    • No space August 23, 200917
    • Space August 23, 200918
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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) August 23, 2009 20
    • Boolean operators  AND- retrieves only records containing both terms. e.g. War AND peace  OR- retrieves records containing either one or War peace more terms war  NOT- exclude records containing the second term e.g. war NOT peace August 23, 2009 21
    • 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” August 23, 2009 22
    • 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? August 23, 2009 23
    • 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 August 23, 2009 24
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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 August 23, 2009 28
    • Web 2.0: Evolution Towards a Read/Write PlatformCompanies CommunitiesHTML XML August 23, 2009 29
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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 August 23, 2009 31
    • 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 August 23, 2009 32
    • 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 August 23, 2009 33
    • 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 August 23, 2009 34
    • 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 August 23, 2009 35
    • 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 August 23, 2009 36
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    • Delicious -It is a social bookmarking service that allows users to tag, save, manage and share resources on the Internet. Delicious - Integrative approach to sharing, teaching and learning. August 23, 2009 39
    • 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. August 23, 2009 40
    • 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 August 23, 2009 41
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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. August 23, 2009 44
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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 August 23, 2009 48
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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 August 23, 2009 50
    •  Delicious login Demonstration Thank You August 23, 2009 51