Advanced Computer Search

Advanced Computer Search

Advanced Computer SearchDr. Galal NadimCT, IBCT,NCFLDAssociate Prof. , Communication Engineering24 October 2010Galal E. Nadim1

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Please Introduce Yourself!24 October 20103

Galal E. Nadim

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Let Us Agree


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Expectations24 October 20105Galal E. Nadim

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ObjectivesUpon completion of this one-day workshop, the students will be able to: Understand the integrated, text-based search and retrieval system used at major databases such as NBCI Know how search engines workDevelop competencies in searching internet. Learn how to benefit from online resources.Learn how to retrieve Information from the database

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Know how to search by name, business, address, or phone Number. AccuratelyPractice limits your search by criteria such as language, currently indexed subsets, or research field.Practice searching for Journals Indexed in national and international databases.


Practice searching for educational videos Indexed for Online UsersApply the learned skills in preparing assignments and essays.


VariablesInternet Browsing An IntroductionSearch EnginesSearch TechniquesEncleopediaOpen Access JournalsLibrariesDatabases


10Conversions surpriseGeneral pattern: number units1 in units2


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Internet Browsing An Introduction

The Web PageNavigationBookmarksSaving Pages and Images


The Web Page

Go back to the previous pageStop loading pageGo to Home pageReload the pageLoading status Time leftAddress bar24 October 2010Galal E. Nadim13

Navigation

The Internet Explorer windowThe Internet Explorer window displays one web page at a time, At the top the Address is the address of the page being viewed - URL (Universal Resource Locator) -- each page has its own unique URL. Some URLs are case-sensitive and all characters have to be typed exactly, including spaces or special symbols such as.

Address Bar24 October 2010Galal E. Nadim14

Navigation

By default, a blue link represents a page you haven't viewed yet, and a purple link represents one that you have. (Shown Below)


BookmarksBookmarksBookmarks provide a permanent and easy way to remember your favorite web pages. Creating a Bookmark:Go to the page you want to mark. Go to the Favorites menu, and click on Add to Favorites. Give the page a name or keep its original name. Then click on OK.


Saving Pages and Images

Saving an ImageIn order to save an image on a web page, put your mouse pointer over the picture that you want to save and then:Right-click the mouse and choose Save Picture As. Browse to a location on your hard drive where you want to save the image and click Save.


Saving Pages and Images

Saving a Web Page (and Viewing it Later)To save a web page onto your hard drive, go to the page that you want to save. From the File menu, choose Save As. You can type a new filename in the File name: In the Save as type: drop down menu. The default choice is Web Page, complete to save the page along with all of its images and HTML only which saves the page without the images.


Search EnginesTypes of Search EnginesSamples of Search EnginesRefining Your SearchLet us practiceExercersi 1Exercise 2


Types of Search Engines

There are two types: directories and indexes. Directories:Directories, such as Yahoo! are good at identifying general information. They classify websites into categories, such as accounting firms, English universities and natural history museums. The results of your search will be a list of websites related to your search term. For example, if you are looking for art museums, you might use a directory to find it.24 October 2010Galal E. Nadim20

Indexes:We would make use of Google if we are looking for specific information like the Life of Edward De Bono - Web indexes would be appropriate, because they search all the contents of a website.Indexes use software programs called spiders and robots that scour the Internet, analyzing billions of web pages, newsgroup and blog postings, and indexing all of the words. Some even index audio and video.


Samples of Search Engines


Refining Your Search

George Boole (English Mathematician) developed an algebra of logicThis has become the basis for computer database searches. Boolean logic uses words called operators to determine whether a statement is true or false. The most common operators are AND, OR and NOT.InputOutputWord1 AND Word2Documents with both wordsWord1 OR Word2The greatest amount of matches; documents with either wordWord1 NOT Word2Documents about Word1, but not about Word2; a good way to limit the search.


Let us practiceLet us do a search and document our findings:As part of the Tiger Trail initiative, you need to speak about the number of tigers left in the World and some statistics.Feedback:What was the time taken for the search engine to give the results:How many number of responses did you receiveWrite down three main points that would help your speech


Information to be Retrieved

What does the term 'School' in Cambridge usually indicate?How many schools do they have and list them.The Universities Core valuesThe Central Address for University Business


Type the Website - www.cam.ac.uk


Click on School, Faculties & Departments


Write down the required information


Go back & Click on University and Colleges


The University


Click on The Universitys Mission & Core Values




Go back and Click on Contact Us


Do a CTRL+F and Search for Central Address




RECAPWhat is a search engine?An index to web pages and their contentcan be searched using keywords or exact titles of documents many different types of content can be searched eg. web pages, images, maps, pdf files.

Name Some Popular search enginesGoogle Alta Vista AnzwersMetasearch engines: Dogpile; Yahoo; Metacrawler24 October 2010Galal E. Nadim36

Lists: Library home page>Resources>Search engineshttp://www.library.unisa.edu.au/resources/subject/engine.asp

AllSearchEngines.comhttp://allsearchengines.com/complete.html

to Google has become a verb24 October 2010Galal E. Nadim37

Cheat sheet athttp://www.google.com/help/cheatsheet.html

Not case sensitive Phrases in double quotes eg. transition to retirement OR for alternate words eg. small business enterprise OR SMEsTry Advanced Search24 October 2010Galal E. Nadim38

Search Techniques

URLMain StepsKeyword choiceUsing Advanced SearchBoolean Operators, +, -, ____ etc.


40 Search literacySix kinds of knowledge & skills needed to search:

pure engine techniquesearchstrategysite: ricoh.com double quotes minus (as exclude) plus (include)filetype:pdfintitle:cheat sheet etc

knowing when to shiftknowing when to stopmove from wide to narrowpreserving state


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domain knowledgemedical knowledgeplumbing knowledgeEnglish litworld languages

informationmappingreverse dictionarykeyword frequenciescontents of domainsWikipediaknowing whats available etc


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42site-specificknowledge

assessmentIs this believable? How does this link to other information I already know? What is the relationship of this information to authoritative sources?

Knowing particular layout and features of a site (metadata sort/filter; variant query mechanisms; location of print version alternate view)


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43Six components of expertiseassessmentsite-specificknowledgepure engine techniquedomain knowledgesearchstrategyinformationmapping24 October 2010Galal E. Nadim

43Contrast this with traditional library use knowledge. Its all kind of the same except pure engine technique used to be library science But theres a big difference the scale and scope of information available. Site-specific knowledge is much broader / deeper than previously.