Print & Electronic Journal Usage Patterns: a Library Case Study by ETH Zrich Dr. Alice Keller, ETH-Bibliothek Elseviers 4th ScienceDirect Annual Conference, Amsterdam,14-15 March 2002 Journals at the ETH Library Print only journals: 2800 Print + online journals: 2000 Online only journals: Total: 6000 1200 3200 e-journals Journal Usage at the ETH Library Journals consulted in reading room no data available
Documents requested: 480000 items per annum how many are journals? Requests for photocopies: 106000 per annum mainly journal articles Print Journal Usage: Selected Titles Planta Medica, Thieme 140 requests in 2001 Journal of Animal Ecology, Blackwell 82 requests in 2001 Biochemistry, ACS online 432 requests in 2001 Chemistry of Materials, ACS online 146 requests in 2001
Historia Mathematica, Academic Press online 17 requests in 2001 140 requests in 2001 1953 1955 1957 1959 1961 1963 1965 1967 1969 1971 1973
40 Chemistry of Materials, ACS (1989-) (available online from 1996) Usage Pattern 25 20 15 10 5 146 requests in 2001 + 1069 full text downloads in 2001 1989 1990 1991 1992 1993
1994 1995 1996 1997 1998 1999 2000 2001 0 Historia Mathematica, Academic Press (1974-) online available from 1996 3 2 1
17 requests in 2001 + 3 full text downloads in 2001 1975 1977 1979 1981 1983 1985 1987 1989 1991 1993 1995 1997
1999 0 2001 Requests for print volumes (2001) Usage Pattern 2001 Print Usage Patterns: Conclusions Recent years are most heavily used However, backyears are also requested regularly Usage stats show roughly 8 times as many full text downloads as print requests (estimate) Online access reduces but does not eliminate requests for print volumes Electronic Journals at ETH Library 3200 e-journals (January 2002)
All STM titles National consortia for Springer LINK Academic Press Elsevier ScienceDirect Usage of Electronic Journals Usage statistics available at ETH Library Comparison of usage of different journals Benefits of journal consortia Comparison of journal usage in different subject areas E-Journal Usage Statistics at ETH Library E-Journals at ETH Zurich: Availability of usage stats according to pub lishers 10% 9% Publisher supplied usage data
Publisher could not supply data Publisher w as not approached 81% E-Journal Usage Statistics at ETH Library 63% E-Journals at ETH Zurich: Availability of usage stats according to Journals Publisher supplied usage data Publisher could not supply data Publisher w as not approached 11% 26%
E-Journals Usage: Summary of All Titles (2001) E-Journal Usage: All Titles 1400 1000 800 600 400 200 2800 2600 2400 2200 3000 and over No. of full text dow nloads 2000 1800
1600 1400 1200 1000 800 600 400 200 0 0 No. of journals 1200 ... Looking at Those with under 100s Downloads... E-Journal Usage: All Titles
600 400 300 200 100 No. of full text dow nloads over 100 100 90 80 70 60 50 40 30
20 10 0 0 No. of journals 500 E-Journal Usage Patterns I: Conclusions 8,3% of the e-journals were never accessed during 2001 A further 53% are not accessed more than 50 times 22 journals are accessed more than 3000 times .... ... These 22 Journals are ...
Science, Am.Assoc.Adv.Science Nature, Macmillan PNAS, Nat.Acad.Sciences Journal of Biological Chemistry, ASBMB Journal of the ACS, ACS Lecture Notes in Computer Science, Springer Journal of Organic Chemistry, ACS Cell, Cell Press Tetrahedron Letters, Elsevier Organic Letters, ACS Computers and Security, Elsevier
Physical Review Letters, APS Journal of Chemical Physics, AIP Chemical Communications, RSC Journal of Physical Chemistry A, ACS Physical Review B, APS Journal of Cell Biology, Rockefeller Univ. Press Biochemistry, ACS Nature Biotechnology, Nature America Applied Physics Letters, AIP Tetrahedron, Elsevier EMBO Journal, OUP Benefits of Journal Consortia A consortium offers: New titles that were not available in
print Increased Collection Access to articles that were not available in print Article Cross Access Increased Collection A consortium enriches the librarys collection with new titles that werent subscribed to before. Article Cross Access Users can download articles they didnt have access to before. Benefits of Consortia according to Subject Area (all data ETH) Subject areas analysed: Biology Chemistry Earth Sciences Mathematics
Medicine Physics Mechanical Engineering Benefits of Consortia acc. to Subject Area: Increased Collection (2001) All 3 Consortia (Springer, AP, SciDirect) 400 300 200 Journal in print collection MECH PHYS MED MATH EARTH 0
CHEM 100 BIOL No. of journal titles 500 Increased collection Benefits of Consortia acc. to Subject Area: Article Cross Access (2001) 50'000 40'000 30'000 20'000 Journal in print collection MECH PHYS MED
MATH EARTH 0 CHEM 10'000 BIOL No. of full text downloads All 3 Consortia (Springer, AP, SciDirect) Article Cross Access Cross Access Rates Around the World ETH Library: 9-23% (*) Bayern Consortium: 24-31% OHIO Link Consortium: 30-85%
(*) all depending on publisher A high cross access rate indicates .... a successful consortium, .... or that the print collection was inadequate. Comparison of Journal Usage in Different Subject Areas Subject areas analysed: Biology: 380 FTEs Chemistry: 340 FTEs Earth Sciences: 215 FTEs Mathematics: 200 FTEs Physics: 385 FTEs Mechanical Engin.: 367 FTEs (All faculty members (FTE), doctoral + postdoc students (FTE), advanced undergraduate students) Comparison of E-Journal Collection in Different Subject Areas
MECH PHYS MATH EARTH CHEM 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 BIOL No. of journals per FTE E-Journal Collection / Subject Area Comparison of E-Journal Usage
in Different Subject Areas 300 250 200 150 100 MECH PHYS MATH EARTH 0 CHEM 50 BIOL No. of full text downloads per FTE Full Text Dow nloads / Subject Area
All data from ETH Zurich, Jan-Dec 2001 E-Journal Usage Patterns II: Conclusions Usage data is still very incomplete Many journals are rarely used, few are very heavily used Consortial deals increase size of collection Cross access rates vary according to libraries and subject areas Heaviest e-journal usage is found in Biology, Chemistry and Physics Weakest usage in Engineering A final word from the Neue Zrcher Zeitung (22.02.02): - Lgen verdammte Lgen Statistik Internetstatistik End
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