PowerPoint PresentationInformation Retrieval
Is the science and practice of identification and efficient use of recorded media
Biomedical literature
Multimedia publishing
Chemical structures
Cartographic materials
1971 MEDLARS Online
1980s full-text databases
Original content (primary literature)
Original content (primary literature)is developed through new observations and analysis of the world.
(Medical journal articlesconference proceedings white papers etc.)
Peer review
Authors develop synoptic content by extracting important observations and principles from sources of original content, as well as from personal experience.
Text book, practice guidelines, drug monographs, review articles etc.
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Bibliographic content is the information abstracted from the original source
Full-text content:
Citation information
Original literature
Review articles
item attribute (document No.)
The process of stating information needs in terms of queries
Information need is the searcher’s expression, in her own language, of the information that she desires
“should middle-aged men be given a daily dose of aspirin to prevent heart attack”
Aspirin AND prevention AND heart AND attack
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The goal of indexing is to produce the smallest, most efficient representation of the original content that will facilitate high-quality retrieval
Index items are units of information suitable for matching with a query
Index attributes describe facets of the item
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Content structuring
Medline
Information abstracted from the publication, such as the authors’ names, article title, article source, publication data, and authors’ abstract
Information added by a human indexer, such as subject headings and publication types
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IS - 1523-6838 (Electronic)
TI - A case of "pure" preeclampsia with nephrotic syndrome before 15 weeks of
gestation in a patient whose renal biopsy showed glomerular capillary
endotheliosis.
AB - A 35-year-old Japanese woman for whom a previous health checkup showed
normal blood pressure and urinalysis results without serological
AD - Department of Internal Medicine and Division of Immunopathology, Clinical
Hospital, Chuoh, Japan. timasawa@yahoo.co.jp
TA - Am J Kidney Dis
JT - American journal of kidney diseases : the official journal of the
National Kidney Foundation.
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Medical Subject Headings (MeSH)
MeSH was developed by the NLM to represent important concepts in biomedicine.
18,000 subject headings grouped into one of 15 trees
Diseases Category
Cardiovascular Diseases
Vascular Diseases
The reason that Medline have manually assigned controlled-vocabulary terms :
More thorough representation of the main concepts found in the paper
It facilitates retrieval by concept
Publication type: 1991 more detailed PT
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Query formulation is the process by which information needs are translated into queries suitable for searching.
Person’s role in the healthcare process
Medical researchers
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Field qualification: a designation fo which index or field should be searched
Text-word searching
Wildcard characters * #
Ranking or sorting the output by some criteria
Displaying the results to the user
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Matching
Queries are compared against the index, and a result set is created
Ranking
The original result set is sorted or ranked by criteria (chronology, alphabetic ranking, relevance ranking )
Display
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Number of relevant documents in database
Recall= Number of documents retrieved and relevant
Number of documents retrieved
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Recall and precision of clinician searchers at McMaster university (1990)
18.unknown
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PUMC Information Retrieval Training
1963 
Biotechnology Information
National Library of Medicine at NIH
Establish public databases
Disseminate biomedical information
US
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Entrez
PopSet
Structure
PubMed
Books
PubMed Central
Based on key word searching (MESH terms, author names, gene names, accession or gi numbers, or just recognized patterns in the records).
15 database are included….
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Protein sequences
3-D Structure
Part 1. The Databases
Part 2. Data Flow and Processing
Part 4. User Support
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111966
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MEDLINE
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placenta growth oxygen——((("placenta"[MeSH Terms] OR placenta[Text Word]) AND (("growth and development"[Subheading] OR "growth"[MeSH Terms]) OR growth[Text Word])) AND ((("oxygen"[MeSH Terms] OR "oxygen inhalation therapy"[MeSH Terms]) OR "Oxygen"[MeSH Terms]) OR oxygen[Text Word]))
PUMC Information Retrieval Training
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Display)
Abstract report:PMIDUI
Citation Report: MeSH
MEDLINE Report:

Taiwan I Hsueh Hui ChihChang PYtaiwan yi xue za zhi ) 1975
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PUMC Information Retrieval Training
PUMC Information Retrieval Training

PUMC Information Retrieval Training