Jyoti singh
-
Upload
jyoti-singh -
Category
Education
-
view
197 -
download
0
description
Transcript of Jyoti singh
Jyoti Singh .S.
Subject Gateways & Portal
Definition Subject gateways are Internet services which support systematic resource discovery. They provide links to resources (documents, objects, sites or services), predominantly accessible via the Internet. The service is based on resource description.
•Concept
Browsed Searched Quality Controlled
Origin
Beyond Book Marks (Mckiernan, 1996).DESIRE I (Development Of a European Service for Information On Researchers and Education) (1997)
DESIRE II (1999-2000)
•Characteristics
Online serviceIntellectual ProcessSubject Description Facilitates Navigation Series of Meta DataBibliographic Meta Data Print and Electronic Resources
objective
Promote Provide Current Information Provide Access to online & CD.ROM Provide quality of information Provide links of number of other site or document
Search Engine v/s Subject Gateways
Search Engine Subject Gateways
General resources are available It is a gathering place of discipline specific resources.
It totally depends on the powerfulness of the selected search engine along rhythm.
High leveled of human input is there, as selected resources must meet a number of criteria applied by a librarian or academic, who ensure that only high quality ,relevant resources are included in the database.
The result can be overwhelming, unmanageable ,full of irrelevant references and are often too creative to meet user need.
The result are specific, precise, and linked to relevant documents.
•Why library should go for subject Gateways?
Natural MetaphorBrowsing ,Reference desk.Guiding & helping users.
• Initiative of subject gateways
Libraryspot.com:(http://www.libraryspot.com/)Liberians `index to the internet(LII) (http:lii.org/)Argus clearing House(http://www.clearinghouse.net/)Galaxy(http://galaxy.einet.net/)
•TypesGeneral Subject gateways::Google Directory Yahoo! Directorywwwvirtual library
Academic Subject gateways::Ipl.org( Internet public library)InfomineAcademic info
Benefit & Limitation
Benefit LimitationProvide Connectivity Expandability
Competitive Bidding Dissimilar Concept
Isolation Configuration and programming
Interconnection
What is portal• Portal provide diverse information in a unique and Unified way.• Portlet: Area dedicated on the Portal for displaying information.• It is a single point of access to information from different sources.
Need
• Cope with growing demand of user.• For resolving information overload encountered by the user.
What a Portal Does
Enable Universal log in Integration to other systemFacilitates messaging and notification Facilitates multi-channel consistency
Feature
SecurityAccess different dataSearch Personal contentPublish Content
What a portal is not
InternetExtranetGroupwareKnowledge management solutionGroupware
Types
Major portal contenders
Alta vistaExcite InfoseekLycosMicrosoft internet startYahoo
What is future trend?
•Hype cycle:- Graphic representation of maturity, adoption and social application of specific technologies.• Future growth of Portals have been greatly shown in the hype cycle reports. • Analyst’s reports had inquire the future development of portals.