2009 Garnet Technologies Inc. This material may be quoted or reproduced provided appropriate credit is given and copyright notice is retained

2009 Garnet Technologies Inc. This material may be quoted or reproduced provided appropriate credit is given and copyright notice is retained .


Welcome

•Brian Linton•Garnet Technologies Inc•http://www.garnettechnologies.com• [email protected]• Web Applications Programming & Design


Class Format

Presentation of material“Hands on” Practical exercises Research Lesson Reviews


Course Materials

PowerPoint PresentationsInternet Resources Course Texts


Prerequisites

Experience Using the Microsoft Windows Operating System

Experience with a windows text editor.



Website Taxonomy

• Inner-directed• The home page typically features the firm’s logo and accomplishments. • Lack a focus on specific products or services. • Fails to encourage urgency or visitor involvement.• These sites typically feature photographs of buildings, lists of accomplishments, and testimonials from satisfied customers.• http://www.bayviewhospital.com.bb/


Website Taxonomy

• Information-oriented •Web sites provide information about the firm’s products and services• Electronic brochures- communicate the same types of material as found in brochures. • No two-way information exchange with Web site visitor. http://www.esscoonline.com/


Website Taxonomy

• Interactive • Marketing tool• Mass market content providers. • Games, entertainment, community. http://www.kadooment.com/• http://www.bajandancehall.com/


Website Taxonomy

•Transaction-oriented • Web sites assume that every visitor is ready to buy • Place an emphasis upon price, product features and benefits• Premium on urgency• e-Commerce • Airlines, book stores, concert ticket outlets, and computer hardware, software makers. • http://www.caribworldshop.com/


Website Taxonomy

•Transaction-oriented • e-Business• The conduct of business on the Internet.• Customer Relationship Management, Human Resource Management• http://www.cweservice.com.bb/


Website Taxonomy

•Web 2.0 • Use of WWW technologies• Enhanced creativity, information sharing, collaboration, functionality• Exercise- Does Web 2.0 really exist?



Definition-The Internet• A worldwide interconnection of individual networks operated by government, industry, academia, and private parties• Worldwide system of computer networks - a network of networks in which users at any one computer can, if they have permission, get information from any other computer • A collection of networks and gateways around the world communicating via TCP/IP• International community of people who share information, interact, and communicate.•Public, cooperative, and self-sustaining facility accessible to hundreds of millions of people worldwide.


Definition-The Internet

• Collection of networks• The use of a standard protocol TCP/IP• Public• Decentralized


History of the Internet• Conceived by the Advanced Research Projects Agency (ARPA) of the U.S. government in 1969 • First known as the ARPANet• Aim was to create a network that would allow users of a research computer at one university to be able to "talk to" research computers at other universities. • Because messages could be routed or rerouted in more than one direction, the network could continue to function even if parts of it were destroyed in the event of a military attack or other disaster.• International growth, Commercial applications in addition to academic use.• Public, cooperative, and self-sustaining facility


History of the Internet

•Hobbes Internet Timeline• http://www.zakon.org/robert/internet/timeline/• History of the Internet• http://www.isoc.org/internet/history/• http://www.isoc.org/internet/history/cerf.shtml• http://www.wdvl.com/Internet/History/

• History of the WWW• http://www.wdvl.com/Internet/History/• http://www.w3.org/People/Raggett/book4/ch02.html



Searching the Internet

• Internet is likened to a global library

• Billions of publicly available documents on the Internet

• Document growth is doubling

• Major Search engines/directories cover 3 to 34% of these documents

•Three quarters of users cite inability to find information as primary frustration



• Search services are starting point for searching information

• Two main types

• ‘Directories' that classify Web documents or locations into an arbitrary subject

classification scheme or taxonomy

•‘Search engines' that index words or terms in

Internet documents



•Directories- http://dir.yahoo.com/, About.com

• Search Engines-google.com, msn.com


Searching the Internet-Directories

• Search Directories require people to view the individual Web site and determine its placement into a subject classification scheme or taxonomy.

• Keywords associated with those sites can be

used for searching the directory's database



•Search engines use 'spiders' or 'robots' to go out and retrieve individual Web pages or documents

• Search engines tend to "index" (record by word) all of the terms on a given Web document.

• Or they may index all of the terms within the first few sentences, the Web site title, or the

document's metatags



• Services must re-sample sites on a periodic basis.

• Precision, recall and coverage are limiting factors for most search engines.



•Precision measures how well the retrieved documents match the query.

• Recall measures what fraction of relevant documents are retrieved.

• Coverage refers to what percentage of the potential universe of relevant documents is

cataloged by the engine.



• Consider a search engine with 10 documents

• Five of which mention Barbados Hotels

• Total universe of 50 potential documents mentioning Barbados Hotels

• Search for ‘Barbados Hotels’ returns 4 relevant documents and two non relevant ones

• Precision of 0.66, a recall of 0.80 and

coverage of 0.10.



• Due to imprecision in the query (searching on Barbados Hotels and missing the mention of Barbados Hotel)

• Indexing mistakes by the engine

• Keywords entered by the Web document developer that do not actually appear in the document.



• For searches that are easily classified the search directories tend to provide the most

consistent and well-clustered results.

• Searches of a research nature tend to be

better served by the search engines.

• Flexibility of indexing every word to give users complete search control creates too

many results


Search Tips

• Use nouns and objects as query keywords

• Example: planet or planets

• Why Important? Actions (verbs), modifiers (adjectives, adverbs, predicate subjects), and conjunctions are either "thrown away" by the search engines or too variable to be useful


Search Tips

• Use 6 to 8 keywords in query.

• Example: new, planet, planets, discovery, solar, system

• Why Important? More keywords, chosen at the appropriate "level", can reduce the universe of possible documents returned by

99% or more.


Search Tips

• Truncate words to pick up singular and plural versions.

• Example: planet* or discover*

• Why Important? Use asterisk wildcard. The wildcard tells the search engine to match all characters after it, preserving keyword slots

and increasing coverage by 50% or more.


Search Tips

• Use synonyms via the OR operator.

• Example: discover* OR find

•Why Important? Cover the likely different ways a concept can be described; generally avoid OR in other cases .


Search Tips

• Combine keywords into phrases where possible

• Example: "solar system*"

• Why Important? Use quotes to denote phrases. Phrases restrict results to EXACT matches


Search Tips

• Combine 2 to 3 "concepts" in query.

•Example: "solar system", "new planet*", discover* OR find

• Why Important? Triangulating on multiple query concepts narrows and targets results, generally by more than 100-to-1.


Search Tips

• Distinguish "concepts" with parentheses.

•Example: ("solar system") ("new planet*") (discover* OR find)

•Why Important? Nest single query "concepts" with parentheses. (Overkill for now, but good practice when first learning.) Simple way to ensure the search engines evaluate your query in the way you want, from left to right.


Search Tips

• Order "concepts" with subject first.

• Example: ("new planet*") (discover* OR find) ("solar system")

• Why Important? Put main subject first. Engines tend to rank documents more highly that match first terms or phrases evaluated.


Search Tips

• Link "concepts" with the AND operator.

• Example: ("new planet*") AND (discover* OR find) AND ("solar system")

• Why Important? AND glues the query together. The resulting query is not overly complicated nor nested, and proper left-to-right evaluation order is ensured.


Search Tips

•Check your spelling. •Alternative spellings or words• Use appropriate capitalization


Search Tips

•Use multiple Search Engines.• Example: google.com, msn.com, yahoo.com• Why Important? Different technologies used by different engines


Thank you for being such an attentive audience.

This is the end of our presentation.

Any Questions?

Documents

2009 Garnet Technologies Inc. This material may be quoted or reproduced provided appropriate credit is given and copyright notice is retained