# 何玉山教授 Prof. Yuh-Shan Ho 北京大学环境科学系 2006年08月25日

## Presentation on theme: "何玉山教授 Prof. Yuh-Shan Ho 北京大学环境科学系 2006年08月25日"— Presentation transcript:

Bibliometric Pritchard, J. (1969), Statistical bibliography or bibliometrics? Journal of Documentation, 25 (4), Fairthor, R.A. (1969), Progress in documentation - Empirical hyperbolic distributions (Bradford-Zipf-Mandelbrot) for bibliometric description and prediction. Journal of Documentation, 25 (4), London, England

Bibliometric 应用数学与统计方法至书或其它形式的文字传播。是一种测量的技术。(Pritchard, 1969)

Bibliometric 以数量分析与统计方法对文献做分布与特性的探讨。

Bibliometric 图书管理与信息科学

Bibliometric Laws Lotka’s Law Bradford’s Law Zipf’s Law

Lotka’s Law Lotka, Alfred James (1880 - 1949), USA
The number of authors making n contributions is about 1/na of those making one contribution, where a is often nearly 2. Lotka, A.J. (1926), The frequency distribution of scientific productivity. Journal of the Washington Academy of Science, 16 (12),

Journals in a field can be divided into three parts, each with about one-third of all articles: 1) a core of a few journals, 2) a second zone, with more journals, and 3) a third zone, with the bulk of journals. The number of journals is 1:n:n2. Bradford, S.C. (1934), Sources of information on specific subjects. British Journal of Engineering, 137 (3550),

Zipf’s Law George Kingsley Zipf (1902-1950)
The probability of occurrence of words or other items starts high and tapers off. Thus, a few occur very often while many others occur rarely. Pn 1/na, where Pn is the frequency of occurrence of the nth ranked item and a is close to 1.

Zipf’s Law rf = C where r is the rank of a word;
f is the frequency of occurrence of the word; C is a constant that depends on the text being analyzed.

Zipf’s Law Zipf, G.K. (1945), Some psychological determinants of the structure of publications. American Journal of Psychology, 58 (4),

Prof. Eugene Garfield

Prof. Eugene Garfield President/Editor-in-Chief The Scientist
Founder & Chairman Emeritus Institute for Scientific Information

Prof. Eugene Garfield Columbia University, B.S., Chemistry, 1949
Columbia University, M.S., Library Science, 1954 University of Pennsylvania, Ph.D., Structural Linguistics, 1961

Prof. Eugene Garfield 1955 the idea of an impact factor
1958 Starts Institute for Scientific Information (ISI) 1960s Created the journal impact factor with Irving H. Sher

Institute for Scientific Information (ISI)
Web of Science Current Contents Connect ISI Proceddings Derwent Innovations Index Dwewent Web of Namotechnology Biological Abstracts BIOSIS Previews CAB Abstracts Food Science and Technology Abstracts Inspec MEDLINE PsycINFO Zoological Record

Institute for Scientific Information (ISI)
Analytical Tools Journal Citation Reports Essential Science Indicators Other Resources ISI HighlyCited.com

Web of Science (WOS) Institute for Scientific Information (ISI)于1997年间建置之因特网版引用文献索引数据库系统

Web of Science (WOS) Citation Databases Chemistry Databases

Citation Databases Science Citation Index Expanded (SCI-EXPANDED): 1900-present Subject Category: 171 Journal: 6088 Year: 2005

Citation Databases Social Sciences Citation Index (SSCI): 1956-present
Subject Category: 53 Journal: 1747 Year: 2005

Citation Databases The Arts a Humanities Citation Index 1975-present

Citation Databases Science Citation Index Expanded (SCI-EXPANDED)

JCR评估过程 ISI每年审查的期刊约有2,000种 10%到20%的期刊会被收录 已被收录的期刊也被追踪考核，以确定其仍然维持高质量水平。
ISI评估小组具有其所负责领域的相关教育背景，及信息科学方面的经验素养，必要时ISI的顾问团也参与评估。

JCR评估考虑因素 期刊的基本出版标准（Basic Journal Standards） 编辑内容（Editorial Content）

JCR-期刊评鉴工具 哪些期刊最具影响力？ 哪些期刊最常被使用？ 哪些期刊最热门？ 哪些期刊出版量最大？ 哪些期刊最常被引用？

JCR-期刊评鉴工具 期刊影响系数（Impact Factor）高或低？ 哪些期刊的立即引用率（Immediacy Index）最高？

Journal Citation Reports
Impact factor: a ratio between citations and citable items published (Garfield, 1972)

Impact Factor CA-A Cancer Journal for Clinicians

Impact Factor New England Journal of Medicine

Impact Factor Science

IF: Impact Factor; II: Immediacy Index; No
IF: Impact Factor; II: Immediacy Index; No.: Number of articles in 2005 Last data updates 20/08/2006

Last data updates 20/08/2006 Environmental Engineering; Environmental Sciences; Water Resources

Last data updates 20/08/2006

Last data updates 20/08/2006

Last data updates 20/08/2006

Lander, ES et al. and International Human Genome Sequencing Consortium (2001), Initial sequencing and analysis of the human genome. Nature, 409 (6822), Author: 243 Institute: 54 Chinese Acad Sci, Inst Genet, Ctr Human Genome, Beijing Genom Inst, Beijing, Peoples R China So China Natl Human Genome Res Ctr, Shanghai, Peoples R China No China Natl Human Genome Res Ctr, Beijing, Peoples R China

Last data updates 20/08/2006 Environmental Engineering; Environmental Sciences; Water Resources

Last data updates 20/08/2006 Environmental Engineering; Environmental Sciences; Water Resources

Last data updates 20/08/2006 Environmental Engineering; Environmental Sciences; Water Resources

Howarth, R. W. , Billen, G. , Swaney, D. , Townsend, A. , Jaworski, N
Howarth, R.W., Billen, G., Swaney, D., Townsend, A., Jaworski, N., Lajtha, K., Downing, J.A., Elmgren, R., Caraco, N., Jordan, T., Berendse, F., Freney, J., Kudeyarov, V., Murdoch, P. and Zhu, Z.L. (1996), Regional nitrogen budgets and riverine N&P fluxes for the drainages to the North Atlantic Ocean: Natural and human influences. Biogeochemistry, 35 (1), Has been cited 134 times 30/07/06

Howarth RW (reprint author), Cornell Univ, Ithaca, NY USA Free Univ Brussels, Grp Microbiol Milieux Aquat, Brussels, B-1050 Belgium US EPA, Environm Res Lab, Narragansett, RI USA Oregon State Univ, Dept Bot & Plant Pathol, Corvallis, OR USA Iowa State Univ, Ames, IA USA Univ Stockholm, Dept Syst Ecol, Stockholm, S Sweden Univ Stockholm, Ctr Marine Res, Stockholm, S Sweden Inst Ecosyst Studies, Millbrook, Ny USA Smithsonian Environm Res Ctr, Edgewater, MD USA Dlo, Cabo, Wageningen, Nl-6700 AA Netherlands Csiro, Div Plant Ind, Canberra, Act 2601 Australia Inst Soil Sci & Photosynth, Pushchino, Russia US Geol Survey, Div Water Resources, Albany, NY USA Inst Soil Sci, Lab Mat Cycling Pedosphere, Nanjing, Peoples R China

Impact Factor的迷失

Environmental Science & Technology
Subject Categories: Engineering, Environmental: Impact Factor 4.054, 1/37 (2005) Environmental Sciences: 5/140 (2005)

Environmental Science & Technology
From 1969, Vol 3 (1) to 2006, 40 (13), documents Time cited > (0.43%) documents Time cited  (2.8%) documents Time cited = (29%) documents Time cited = (7.1%) documents Time cited = (4.6%) documents

Environmental Science & Technology
284 papers Kile, D.E., Chiou, C.T., Zhou, H.D., Li, H. and Xu, O.Y. (1995), Partition of nonpolar organic pollutants from water to soil and sediment organic matters. Environmental Science & Technology, 29 (5), Has been cited 104 times 02/08/06

Environmental Science & Technology
US Geol Survey, Denver Fed Ctr, Denver, CO USA Minist Water Resources, Water Qual Res Ctr, Beijing, Peoples R China Nanjing Univ, Dept Environm Sci & Engn, Nanjing, Peoples R China

The most frequently cited paper
Hamilton, M.A., Russo, R.C. and Thurston, R.V. (1977), Trimmed spearman-karber method for estimating median lethal concentrations in toxicity bioassays. Environmental Science & Technology, 11 (7), Environmental Engineering: Impact Factor 4.054, 1/37 (2005) Environmental Sciences: 5/140 (2005) Montana State University Has been cited 768 times 30/07/06

The most frequently cited paper
Ho, Y.S. and McKay, G. (1999), Pseudo-second order model for sorption processes. Process Biochemistry, 34 (5), Biochemistry & Molecular Biology: Impact Factor 1.796, 174/261 (2005) Biotechnology & Applied Microbiology: 61/139 (2005) Chemical Engineering: 13/116 (2005) Has been cited 213 times 02/08/06

The most frequently cited paper
Ho, Y.S. and McKay, G. (1998), Sorption of dye from aqueous solution by peat. Chemical Engineering Journal, 70 (2), Engineering, Chemical: Impact Factor: 2.034, 11/116 (2005) Has been cited 133 times 02/08/06

The most frequently cited paper
Ho, Y.S., Wase, D.A.J. and Forster, C.F. (1996), Kinetic studies of competitive heavy metal adsorption by sphagnum moss peat. Environmental Technology, 17 (1), Environmental Sciences: Impact Factor 0.718, 109/140 (2005) Has been cited 104 times 02/08/06

The most frequently cited paper
Ho, Y.S., Wase, D.A.J. and Forster, C.F. (1994), The adsorption of divalent copper ions from aqueous solution by sphagnum moss peat. Process Safety and Environmental Protection, 72 (B3), Engineering, Environmental: Impact Factor 0.500, 29/37 (2005) Engineering, Chemical: Impact Factor 0.500, 72/116 (2005) Has been cited 45 times 02/08/06

The most frequently cited paper
Ho, Y.S. and McKay, G. (1998), Kinetic models for the sorption of dye from aqueous solution by wood. Process Safety and Environmental Protection, 76 (B2), Engineering, Environmental: Impact Factor 0.500, 29/37 (2005) Engineering, Chemical: 72/116 (2005) Has been cited 75 times 02/08/06

The most frequently cited paper
Ho, Y.S. and McKay, G. (1998), A comparison of chemisorption kinetic models applied to pollutant removal on various sorbents. Process Safety and Environmental Protection, 76 (B4), Engineering, Environmental: Impact Factor 0.500, 29/37 (2005) Engineering, Chemical: 72/116 (2005) Has been cited 83 times 02/08/06

The most frequently cited paper
Ho, Y.S. and Chiang, C.C. (2001), Sorption studies of acid dye by mixed sorbents. Adsorption-Journal of the International Adsorption Society, 7 (2), Chemistry, Physical: Impact Factor 1.323, 70/111 (2005) Engineering, Chemical: 30/116 (2005) Has been cited 72 times 02/08/06

The most frequently cited paper
Ho, Y.S. and McKay, G. (1999), Comparative sorption kinetic studies of dye and aromatic compounds onto fly ash. Journal of Environmental Science and Health Part A-Toxic/Hazardous Substances & Environmental Engineering, 34 (5), Engineering, Environmental: Impact Factor /37 (2005) Environmental Sciences: 104/140 (2005) Has been cited 48 times 02/08/06

The most frequently cited paper
Ho, Y.S. and McKay, G. (2000), The kinetics of sorption of divalent metal ions onto sphagnum moss peat. Water Research, 34 (3), Engineering, Environmental: Impact Factor 3.019, 3/37 (2005) Environmental Sciences: 8/140 (2005) Water Resources: 1/57 (2005) Has been cited 186 times 02/08/06 Rank 1st in citation from 515 papers of Water Research (2000); Rank 3rd in citation from 4,815 papers of Water Research (from year 1997, Volume 31 (1) to year 2006, Volume 40 (12))

The most frequently cited paper
Lowry, O.H., Rosebrough, N.J., Farr, A.L. and Randall, R.J. (1951), Protein measurement with the folin phenol reagent. Journal of Biological Chemistry, 193 (1), Biochemistry & Molecular Biology: Impact Factor 5.854, 38/261 (2005) Washington University Has been cited more than 100,000 times since /07/06

Journal of Biological Chemistry
Biochemistry & Molecular Biology: Impact Factor 5.854, 38/261 (2005) Publisher: Amer Soc Biochemistry Molecular Biology Inc Issues/Year: 52 Journal Country/Territory: United States Language: English

Journal of Biological Chemistry
Fiske, C.H. and Subbarow, Y. (1925), The colorimetric determination of phosphorus. Journal of Biological Chemistry, 66 (2), Harvard Medical School Has been cited 21,385, 30/07/06

Journal of Biological Chemistry
Folch, J., Lees, M. and Stanley, G.H.S. (1957), A simple method for the isolation and purification of total lipides from animal tissues. Journal of Biological Chemistry, 226 (1), Harvard Medical School Has been cited 35,293, 30/07/06

Journal of Biological Chemistry
Omura, T. and Sato, R. (1964), Carbon monoxide-binding pigment of liver microsomes. I. evidence for its hemoprotein nature. Journal of Biological Chemistry, 239 (7), Osaka University Has been cited 10,805, 30/07/06

Journal of Biological Chemistry
Weber, K. and Osborn, M. (1969), Reliability of molecular weight determinations by dodecyl sulfate-polyacrylamide gel electrophoresis. Journal of Biological Chemistry, 244 (16), Harvard University Has been cited 23,289, 30/07/06

Journal of Biological Chemistry
O’Farrell, P.H. (1975), High-resolution 2-dimensional electrophoresis of proteins. Journal of Biological Chemistry, 250 (10), University of Colorado Has been cited 16,918, 30/07/06

Journal of Biological Chemistry
Grynkiewicz, G., Poenie, M. and Tsien, R.Y. (1985), A new generation of Ca2+ indicators with greatly improved fluorescence properties. Journal of Biological Chemistry, 260 (6), University of California Has been cited 16,249, 30/07/06

191 journals

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 Years since 1991 5000 10000 15000 20000 25000 30000 Cumulative number of articles Cumulative number of articles Exponential model Exponential model 02/2010

Seven Major Industrial Countries (G7) - USA

E-mail: ysho@tmu.edu.tw

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