EBSCO Discovery Service - Chiang Mai...
Transcript of EBSCO Discovery Service - Chiang Mai...
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EBSCO Discovery Service
Presented By:
Shaji John
Discovery Innovations and FOLIO
Africa, Southeast Asia, South Asia & South Korea
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• What is Discovery Service
• Features & Functionalities
• Client Lists
• Customized Interfaces
• Demonstration
• Questions
AGENDA
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Discovery Service
Adoption Worldwide
EBSCO Discovery Service (EDS)
8,246 installations
Primo Central
1,529 installations
Summon
697 installations
American Libraries
May 1, 2015
[Marshall Breeding]
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Search Engines
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Empower Users
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Open Relevance Ranking
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Openness About Relevance Algorithm
• EDS relevance details are open for all
customers, potential customers and content
providers
• Truly sophisticated relevance algorithms
are not easy to duplicate
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Relevance Ranking
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The first two
results provide
detailed
information about
how relevance
ranking / value
ranking works
in EDS…
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Relevance Ranking: Quality & Openness
The system has the following priorities and has
no bias toward content from any provider:
1. Match on subject headings from controlled vocabularies
2. Match on article titles
3. Match on author keywords
4. Match on keywords within abstracts
5. Match on keywords within full text
Exact Matches: Exact matches are favored over partial matches –
considering also the field in which those words appear (abstract vs.
full text vs. title, etc.)
Density: Matches across multiple metadata fields are favored for
relevance scoring (more is better). The scoring influence of repeat terms
within individual metadata fields is minimized.
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Relevance Ranking – Layered Calculations
• Term freq / density, scaled fields calc
− Eg. Weights: Subjects: 15, Title: 10, Keyword: 5, Abstract: 2, Full Text: 1
• Tie-breakers / customizers
− Date recency, article length, publication types (e.g. a peer-reviewed article > book review), etc
• Exact match boost
− Score boosted an exact match in a specific field (e.g. Title, of a book)
• Customer influence, preference
− Catalog and Institutional Repositories (IRs)
− Raise or lower relevancy of your specific content
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Value Ranking: Quality & Openness
After conducting an
unprecedented number
of usability studies
with undergraduate students, graduate
students,
and faculty, the following additional
emphases were put in place to improve the
value of the results for the end user:
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Value Ranking: Quality & Openness
Recently published content is
scored higher for relevance
than older content
RECENCY
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Value Ranking: Quality & Openness
Certain document types are weighted higher than
others for relevance scoring
For example, when the word “book”
or “review” is not searched,
there is a “bias” against book reviews,
so these don’t dominate results
DOCUMENT TYPE
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Value Ranking: Quality & Openness
Articles of a more substantial length
have a heavier weighting
(e.g., a ¼ page article is considered
less valuable than a 4 page article)
LENGTH
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Problem: Missed Connections
TOPICAL QUERY Subject Indexing in EDS
adhdAttention-deficit hyperactivity disorderAttention deficit disorder with hyperactivity
pheromones
Ectohormones
Allelochemicals
SemiochemicalsAllomones
PET scanPositron Emission Tomography
Tomography, Emission-ComputedEmission Tomography
gambling addictionCompulsive gamblingPathological Gambling
User queries and subject indexing not always aligned.
Different vocabularies often use different terminology for the same concept.
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JNU Full Text Downloads has increased after
implementation of Discovery
0
20000
40000
60000
80000
100000
120000
140000
160000
180000
2012 2013 2014 2015 2016
Projected
JNU Usage
4696 Full
Text
54164 Full Text
110955 Full Text
167880 Full Text
159435 Full
Text
Updated 8th January 2017
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Con
ten
t
Rele
vance
Configura
bili
ty
Inte
ropera
bili
ty
Focus on Discovery tools and services
Key criteria for Discovery decision making
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VuFind
Blacklight
Koha UI
LMS
Partner UI
EDS UI
Custom
App
EDS
“LMS”Aleph, Symphony,
Millennium
ERMEx Libris SFX,
PQ SS360, EBSCO
FTF
“Next-Gen”ALMA, WMS,
Intota, Kuali OLE,
Sierra, Blue Cloud
Most Relevant Results Above the Fold
Best User Experience
Evaluation CriteriaBackend Systems
Happy End UsersHappy Subject and Reference Librarians
Front-end Discovery - EDS
Learning
Management
System (Moodle, etc.)
Happy Library Administrators
Best user experience, most choice.
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Thai EDS clients
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EDS Interface Customizations
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Result Page for ILI
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MIT LIBRARY NOW
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IIM Bangalore
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IIM Calcutta
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With Library SiteEmbedded Search Box
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No Obligation Free Trial
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Thank You
+91 11 2619 8966 - 67
Shaji John
Find out more information at:
http://www.ebscohost.com