Information Retrieval and Dissemination

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MLIS Course Code 5501-Information Retrieval and Dissemination- Workshop AIOU 2013

MLIS Course Code 5501-Information Retrieval and Dissemination- Workshop AIOU 2013

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  • 1. INTRODUCTION TO LIBRARY & INFORMATION SCIENCES (5501) INFORMATION RETRIEVAL & DISSEMINATION By: Huma Malik Librarian, Preston University, Islamabad
  • 2.  INFORMATION RETRIEVAL (IR) – Definitions – Basic Aspects of IR – Traditional Information Retrieval Steps – Conceptual Model of IR – Types of Information Need – Types of Query Systems  DISSEMINATION OF INFORMATION – Definitions – What it includes? – Process of Dissemination of Information CONTENTS
  • 3. INFORMATION RETRIEVAL (IR)
  • 4.  Information retrieval (IR) is the science of – searching for information in documents, – searching for documents themselves, – searching for metadata which describe documents, or – searching within databases, whether relational stand-alone databases or hypertext networked databases such as the Internet or World Wide Web or intranets, for text, sound, images or data. DEFINITIONS
  • 5. ODLIS (Online Dictionary of Library & Information Science)  Information retrieval is the – process, – methods, and – procedures – used to selectively recall recorded information – from a file of data.
  • 6. Manning (2009)  Information Retrieval is – Finding material (usually documents) – of unstructured nature (usually text) – that satisfies an information need from – within large collections (usually stored in computer)
  • 7. Science and Technology Dictionary  Information retrieval is the  technique and process  of searching, recovering, and interpreting information  from large amounts of stored data. Britannica Concise Encyclopedia  Information retrieval is  recovery of information, especially  in a database stored in a computer.
  • 8. In Libraries Information Retrieval is a general term  It covers a broad range of activities that include specific working on the contents of document (e.g. articles in journals) instead of the whole document.  It involves use of the computer in 1) abstracting, 2) indexing, 3) content analysis, 4) SDI, 5) current awareness, 6) retrospective searching, and 7) related activities that help to make the information available to users.
  • 9. IR deals with three basic aspect 1. Information representation 2. Information storage and organization 3. Information Access Basic Aspects of IR
  • 10. – Information is represented in form of books…etc. – Information is stored and organized using classification, cataloguing, and shelving. Catalogue Traditional Information Retrieval Steps – User uses catalogue to retrieve and access his/her required book.
  • 11. Conceptual Model of IR Indexing Formulation Retrieval Function RelevanceFeedback Documents Document Representation Information Need Query Retrieved Documents
  • 12.  Predictable & Periodic: – The future needs that are known or can be judged and will be required time by time. – Standard programs/ software are developed – e.g., the development of software to automate library core functions, yearly financial reports…  Less Predictable & On Demand – Other future needs are less predictable and require data or information on demand. – e.g. on demand developed software to fulfill needs of a Research Library. Types of Information Need
  • 13. 1. Bibliographic Information Retrieval Systems 2. Data Base Management Systems (DBMSs).  Both types of systems interact with databases, but the type of data held in the databases varies. Types of Query Systems
  • 14.  Provide access to journals, literature and research reports.  Analogous to online libraries.  The user of the system describes a topic of interest, and the attempts to produce documents on the subject.  The documents are often described by index terms  The user of the system must phrase his or her requests in the language of the system. 1. Bibliographic Information Retrieval Systems
  • 15.  Database Management System (DBMS) is a software system designed to allow the – definition, – creation, – querying, – update, and – administration of databases.  DBMS are treated from the user's point of view 2. Database Management Systems (DBMS)
  • 16. DISSEMINATION OF INFORMATION
  • 17.  Information is – knowledge, facts or making facts known  Dissemination means – to spread something, disburse  Information dissemination means – Methods one uses to communicate information DEFINITIONS
  • 18.  When information is retrieved, it means that it has to be disseminated. Otherwise there is no sense of retrieving it.  Dissemination of information means – the distribution or sending of information – to members of an organization – by a librarian or information officer.
  • 19.  This Information include – news bulletins, – abstracts, – individual memoranda or letters, and – personal interview or telephone calls. – cuttings or reports  SDI is also included in dissemination of information, but it is the service for selected people. What it includes?
  • 20. Process of Dissemination of Information Matching RETRIEVED INFORMATION Information Sources Analysis & Representation Organized Information Users (Information Need/ Query ) Query Analysis Search Statements (Analyzed Queries )
  • 21. THANK YOU By: Huma Malik Librarian, Preston University, Islamabad MLIS-AIOU SPRING 2013 WORKSHOP Query Processing & Request Information Processing & Storage Information Retrieved Query Matched