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Permalink Reply by yatendra Gangwar on February 14, 2011 at 22:40

CAS means is that Current awareness service & SDI means is Selective Desimination of Information.

 

in CAS - the provide information is based on current knowledge based on journals, newspapers, etc.

in SDI- firstly library makes the profile of user, that what types of information the user wants, than provide the information of the user based on computer.

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Permalink Reply by Jayshree Dave on February 16, 2011 at 17:42

Current awareness services are the services that provide information about the latest books, articles, events and news in a field. Nowadays, there are many sources of information and the volume of new research is so huge that keeping oneself up to date is a big task. Current awareness services help us to match current awareness news and information to our needs. They can save the effort of scanning and browsing journals, bulletins, newsletters and web sites

 

 

SDI is the ability of a service to notify a user of material that matches the interests of the user.  This involves:

• scanning of material;
• recognizing relevant information in the material;
• summarizing the information; and
• Presenting the summaries information to the user.

In that way, the user can decide whether or not to go ahead with acquiring the material or to wait for other information. It should be remembered that SDI is usually more than just presenting the title, author's name and source reference to a client. It also involves some scanning and abstracting of all the main ideas or concepts in the material. SDI is essentially a form of advertising/publishing for the information service provider (eg. the librarian), to let interested people know of what is available in their field of interest

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Permalink Reply by INDRAKUMARA on March 19, 2015 at 17:49

thank you madam

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Permalink Reply by INDRAKUMARA on March 19, 2015 at 17:51

madam if you dont mind i need dr p.s.g kumar sir  books related in lis field .so pls give me portal link or url plss

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Permalink Reply by Surajit on March 24, 2015 at 0:29

more spefically, CAS is a general awarness service for all and SDI is also current awarness service for a single individual.  SDI is meant for a spcific user.

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