BUSS 909 Office Automation Intranets Tutorial 2 Researching

BUSS 909 Office Automation & Intranets Tutorial 2 Researching on the WWW Clarke, R. J (2001) t 909 -02: 1

Agenda n set up the accounts required to access WWW and other software from the Micro. Labs for use in BUSS 909 - subject login (Labs 1 and 2 only) n define the two types of search engines available from the WWW n identify the two types of search that can be performed: general search for and the more specific within search Clarke, R. J (2001) t 909 -02: 2

Setup Accounts Clarke, R. J (2001) t 909 -02: 3

Setup Accounts Required Information n in order to use the Internet from the Microcomputer Laboratories, you need to have two things: n a University of Wollongong Student (email) Account Userid and password, and n a Microcomputer Laboratories BUSS 909 Subject Login Clarke, R. J (2001) t 909 -02: 4

Setup Accounts Preparation n if you are unsure of the procedure then consult the 2001 Micro. Computer Laboratories Online Help n if you have problems logging in then see the attendant at the Micro. Labs Office n if the PC is off then switch it on; reboot the machine n click on the application icon- double click on the Internet Explorer icon Clarke, R. J (2001) t 909 -02: 5

Search Engines Clarke, R. J (2001) t 909 -02: 6

Search Engines n search engines are web-sites specifically designed to let users search lists of other web-sites n some engines enable searches of Usenet news groups, and FTP sites n there are two general types of service: web indexes and web guides Clarke, R. J (2001) t 909 -02: 7

Search Engines Web Indexes n web indexes are similar to indexes in books n consist of large databases which reference web pages- information stored includes page title, keywords, and the first phrase or two of the page n the keywords are often created by the web page author Clarke, R. J (2001) t 909 -02: 8

Search Engines Web Indexes n web page information is collected by search robots (the software technology which implements them is referred to as autonomous agents) n these agents move around the Internet cataloguing the content of each encountered Web server Clarke, R. J (2001) t 909 -02: 9

Search Engines Web Guides n web guides consist of lists of channels which are in effect lists of predefined searches n these are constructed by monitoring the type of searches users are frequently requesting n most search engines are both guides and indexes- the more users, the more advertising dollars Clarke, R. J (2001) t 909 -02: 10

Search Engines Search Procedure n enter a keyword into the search engine and press search n a message will be displayed indicating the number of web pages found which match the criteria n sometimes no matches are found n however the search is more likely to have produced a large number of ‘hits’ Clarke, R. J (2001) t 909 -02: 11

Search Engines Search Procedure n the search results are listed starting from the most relevant sites, in decreasing order of relevance n order of relevance is indicated by a percentage based on the keyword match to the search criteria n sometimes the same web-page is referenced more than once in the search results list Clarke, R. J (2001) t 909 -02: 12

Search Engines Types of Searches n there are several strategies for producing a smaller set of relevant pages for you to study: n the first strategy is to use a within search to argument the more general search for (see following section) n the second strategy is to use a complex search using boolean operators (see next section) Clarke, R. J (2001) t 909 -02: 13

Search Engines Types of Searches n not all search engines support a within search feature n to implement a within search, the search engine is actually helping the user to construct a limited complex search Clarke, R. J (2001) t 909 -02: 14

Search Engines Examples Yahoo http: //www. yahoo. com/ http: //home. netscape. com/escapes/search/ntsrchdft-4. html Excite http: //www. excite. com/ http: //home. netscape. com/escapes/search/ netsearch_1. html? cp=click_from=/escapes/search/ netsearch_4. html Lycos http: //www. lycos. com/ http: //home. netscape. com/escapes/search/netsearch_3. html? cp=click_from=/escapes/search/netsearch_1. html Infoseek http: //www. infoseek. com/ http: //home. netscape. com/escapes/search/netsearch_2. html? cp=click_from=/escapes/search/netsearch_1. html The direct URL for these search engines are provided first. These search engines are also available from the Netscape Search option, the URLs for which are provided below. Clarke, R. J (2001) t 909 -02: 15

Search Engines Examples Anzwers http: //www. anzwers. com Look. Smart http: //www. looksmart. com Web. Crawler http: //www. webcrawler. com Alta. Vista http: //www. altavista. yellowpages. com. au Clarke, R. J (2001) t 909 -02: 16

Searching Example Clarke, R. J (2001) t 909 -02: 17

Searching Example Within Search n within searches enable subsequent searches of a list of hits previously requested by the user and found by the search engine n the following example uses the Infoseek engine n select Infoseek indirectly from Netscape Search or directly at http: //www. infoseek. com Clarke, R. J (2001) t 909 -02: 18

Searching Example Within Search search on pages returned system failure 11, 297, 139 within searches risks and failure organisations and information systems major australia 52, 402 15, 491 2, 278 125* * but, the closest match to the criteria was a page rated at 67% relevant (very poor) which was actually an advertisment for a Data Recovery company located in Canada! Clarke, R. J (2001) t 909 -02: 19

Searching Example Within Search 1. system failure 11, 297, 139 2. risks and failure 52, 402 3. organisations and information systems 15, 491 4. major 2, 278 5. australia 125 Clarke, R. J (2001) t 909 -02: 20

Searching Syntax Clarke, R. J (2001) t 909 -02: 21

Searching Syntax n most Search Engines and Web Guides let you define more than just the keywords for your search n there is a special syntax that can be used to create specific searches using a combination of symbols and Boolean Operators Clarke, R. J (2001) t 909 -02: 22

Searching Syntax Boolean Operators & Complex Searches n Boolean operators will be famiar to those who have programmed computers n they include AND, OR, NOT n these operators can be used in combination together with ( ) to create complex search queries on the WWW Clarke, R. J (2001) t 909 -02: 23

Searching Syntax Examples Syntax Italian movies +Italian movies -Italian AND movies Interpretation Finds sites that contain “Italian OR movies” Finds sites that contain “Italian”, ie. the results must include “Italian” Find sites about movies that don’t mention “Italian”, ie. the results must not include “Italian” Find sites containing “Italian” and “movies”. Differs from the previous option in that the words do not have to be found next to each other Clarke, R. J (2001) t 909 -02: 24

Searching Syntax Examples Syntax movies OR Italian movies AND NOT Italian (movies +Italian) AND (Fellini -“La Dolce Vita”) AND Pasolini movies +Italian AND Fellini -“La Dolce Vita” AND Pasolini Interpretation Finds sites containing “movies” or “Italian”, or both. The search may find Italian movies, Italian cooking, Hollywood movies, etc. see “movies - Italian” Finds information on Italian movies that made reference to the directors Pasolini and Fellini, but not to Fellini’s film “La Dolce Vita” Finds sites containing movies that mention Italian and Fellini, but not La Dolce Vita or Pasolini Clarke, R. J (2001) t 909 -02: 25

Searching Syntax Order of Precedence n search engines recognise an order of precedence for search operators n if a search request is ambiguous the engine will use the order of precedence to complete the search n the order of precedence for operators is: (), AND, OR, NOT. Clarke, R. J (2001) t 909 -02: 26

Searching Syntax Order of Precedence n the symbols + and - are not part of standard Boolean Operators but it has the same meaning as AND and AND NOT respectively. n enclosing a phrase in inverted commas “like this” is also not a standard Boolean Operator but it has the same meaning as (). Clarke, R. J (2001) t 909 -02: 27

Class Exercise n use the search engines to get URLs about the Office Automation n use the bookmark feature to store sites you might find useful (eg. those which describe actual OA systems) n appropriate URLs should be written on the Useful Links page provided by the Lecturer Clarke, R. J (2001) t 909 -02: 28