Japanese Journal of Tribology

Quartiles

The set of journals have been ranked according to their SJR and divided into four equal groups, four quartiles. Q1 (green) comprises the quarter of the journals with the highest values, Q2 (yellow) the second highest values, Q3 (orange) the third highest values and Q4 (red) the lowest values.

Category	Year	Quartile
Materials Chemistry	1999	Q4
Materials Chemistry	2000	Q3
Materials Chemistry	2001	Q4
Materials Chemistry	2002	Q4
Materials Chemistry	2003	Q4
Materials Chemistry	2004	Q4
Materials Chemistry	2005	Q4
Materials Chemistry	2006	Q4
Materials Chemistry	2007	Q4
Materials Chemistry	2008	Q4
Materials Chemistry	2009	Q4
Materials Chemistry	2010	Q4
Materials Chemistry	2011	Q4
Mechanical Engineering	1999	Q4
Mechanical Engineering	2000	Q3
Mechanical Engineering	2001	Q3
Mechanical Engineering	2002	Q3
Mechanical Engineering	2003	Q4
Mechanical Engineering	2004	Q4
Mechanical Engineering	2005	Q3
Mechanical Engineering	2006	Q3
Mechanical Engineering	2007	Q3
Mechanical Engineering	2008	Q3
Mechanical Engineering	2009	Q4
Mechanical Engineering	2010	Q4
Mechanical Engineering	2011	Q4
Mechanics of Materials	1999	Q4
Mechanics of Materials	2000	Q3
Mechanics of Materials	2001	Q4
Mechanics of Materials	2002	Q4
Mechanics of Materials	2003	Q4
Mechanics of Materials	2004	Q4
Mechanics of Materials	2005	Q4
Mechanics of Materials	2006	Q4
Mechanics of Materials	2007	Q4
Mechanics of Materials	2008	Q4
Mechanics of Materials	2009	Q4
Mechanics of Materials	2010	Q4
Mechanics of Materials	2011	Q4
Surfaces, Coatings and Films	1999	Q4
Surfaces, Coatings and Films	2000	Q3
Surfaces, Coatings and Films	2001	Q4
Surfaces, Coatings and Films	2002	Q4
Surfaces, Coatings and Films	2003	Q4
Surfaces, Coatings and Films	2004	Q4
Surfaces, Coatings and Films	2005	Q4
Surfaces, Coatings and Films	2006	Q3
Surfaces, Coatings and Films	2007	Q3
Surfaces, Coatings and Films	2008	Q3
Surfaces, Coatings and Films	2009	Q4
Surfaces, Coatings and Films	2010	Q4
Surfaces, Coatings and Films	2011	Q4

SJR

The SJR is a size-independent prestige indicator that ranks journals by their 'average prestige per article'. It is based on the idea that 'all citations are not created equal'. SJR is a measure of scientific influence of journals that accounts for both the number of citations received by a journal and the importance or prestige of the journals where such citations come from It measures the scientific influence of the average article in a journal, it expresses how central to the global scientific discussion an average article of the journal is.

Year	SJR
1999	0.102
2000	0.189
2001	0.123
2002	0.119
2003	0.102
2004	0.100
2005	0.118
2006	0.135
2007	0.135
2008	0.140
2009	0.103
2010	0.100
2011	0.111

Total Documents

Evolution of the number of published documents. All types of documents are considered, including citable and non citable documents.

Year	Documents
1999	53
2000	39
2001	36
2002	54
2003	61
2004	60
2005	54
2006	86
2007	59
2008	70
2009	0
2010	0
2011	0

Citations per document

This indicator counts the number of citations received by documents from a journal and divides them by the total number of documents published in that journal. The chart shows the evolution of the average number of times documents published in a journal in the past two, three and four years have been cited in the current year. The two years line is equivalent to journal impact factor ™ (Thomson Reuters) metric.

Cites per document	Year	Value
Cites / Doc. (4 years)	1999	0.014
Cites / Doc. (4 years)	2000	0.037
Cites / Doc. (4 years)	2001	0.021
Cites / Doc. (4 years)	2002	0.029
Cites / Doc. (4 years)	2003	0.022
Cites / Doc. (4 years)	2004	0.011
Cites / Doc. (4 years)	2005	0.043
Cites / Doc. (4 years)	2006	0.057
Cites / Doc. (4 years)	2007	0.046
Cites / Doc. (4 years)	2008	0.039
Cites / Doc. (4 years)	2009	0.045
Cites / Doc. (4 years)	2010	0.047
Cites / Doc. (4 years)	2011	0.023
Cites / Doc. (3 years)	1999	0.014
Cites / Doc. (3 years)	2000	0.035
Cites / Doc. (3 years)	2001	0.029
Cites / Doc. (3 years)	2002	0.023
Cites / Doc. (3 years)	2003	0.023
Cites / Doc. (3 years)	2004	0.007
Cites / Doc. (3 years)	2005	0.034
Cites / Doc. (3 years)	2006	0.069
Cites / Doc. (3 years)	2007	0.040
Cites / Doc. (3 years)	2008	0.030
Cites / Doc. (3 years)	2009	0.023
Cites / Doc. (3 years)	2010	0.047
Cites / Doc. (3 years)	2011	0.043
Cites / Doc. (2 years)	1999	0.010
Cites / Doc. (2 years)	2000	0.025
Cites / Doc. (2 years)	2001	0.022
Cites / Doc. (2 years)	2002	0.013
Cites / Doc. (2 years)	2003	0.011
Cites / Doc. (2 years)	2004	0.009
Cites / Doc. (2 years)	2005	0.025
Cites / Doc. (2 years)	2006	0.061
Cites / Doc. (2 years)	2007	0.043
Cites / Doc. (2 years)	2008	0.041
Cites / Doc. (2 years)	2009	0.016
Cites / Doc. (2 years)	2010	0.014
Cites / Doc. (2 years)	2011	0.000

Total Cites

Self-Cites

Evolution of the total number of citations and journal's self-citations received by a journal's published documents during the three previous years.
Journal Self-citation is defined as the number of citation from a journal citing article to articles published by the same journal.

Cites	Year	Value
Self Cites	1999	0
Self Cites	2000	6
Self Cites	2001	1
Self Cites	2002	3
Self Cites	2003	0
Self Cites	2004	0
Self Cites	2005	1
Self Cites	2006	5
Self Cites	2007	3
Self Cites	2008	3
Self Cites	2009	0
Self Cites	2010	0
Self Cites	2011	0
Total Cites	1999	6
Total Cites	2000	12
Total Cites	2001	7
Total Cites	2002	3
Total Cites	2003	3
Total Cites	2004	1
Total Cites	2005	6
Total Cites	2006	12
Total Cites	2007	8
Total Cites	2008	6
Total Cites	2009	5
Total Cites	2010	6
Total Cites	2011	3

External Cites per Doc

Cites per Doc

Evolution of the number of total citation per document and external citation per document (i.e. journal self-citations removed) received by a journal's published documents during the three previous years. External citations are calculated by subtracting the number of self-citations from the total number of citations received by the journal’s documents.

Cites	Year	Value
External Cites per document	1999	0.014
External Cites per document	2000	0.017
External Cites per document	2001	0.025
External Cites per document	2002	0.000
External Cites per document	2003	0.023
External Cites per document	2004	0.007
External Cites per document	2005	0.029
External Cites per document	2006	0.040
External Cites per document	2007	0.025
External Cites per document	2008	0.015
External Cites per document	2009	0.023
External Cites per document	2010	0.047
External Cites per document	2011	0.043
Cites per document	1999	0.014
Cites per document	2000	0.035
Cites per document	2001	0.029
Cites per document	2002	0.023
Cites per document	2003	0.023
Cites per document	2004	0.007
Cites per document	2005	0.034
Cites per document	2006	0.069
Cites per document	2007	0.040
Cites per document	2008	0.030
Cites per document	2009	0.023
Cites per document	2010	0.047
Cites per document	2011	0.043

% International Collaboration

International Collaboration accounts for the articles that have been produced by researchers from several countries. The chart shows the ratio of a journal's documents signed by researchers from more than one country; that is including more than one country address.

Year	International Collaboration
1999	0.00
2000	0.00
2001	0.00
2002	1.85
2003	1.64
2004	3.33
2005	0.00
2006	1.16
2007	1.69
2008	4.29
2009	0
2010	0
2011	0

Citable documents

Non-citable documents

Not every article in a journal is considered primary research and therefore "citable", this chart shows the ratio of a journal's articles including substantial research (research articles, conference papers and reviews) in three year windows vs. those documents other than research articles, reviews and conference papers.

Documents	Year	Value
Non-citable documents	1999	1
Non-citable documents	2000	0
Non-citable documents	2001	0
Non-citable documents	2002	0
Non-citable documents	2003	0
Non-citable documents	2004	0
Non-citable documents	2005	1
Non-citable documents	2006	1
Non-citable documents	2007	3
Non-citable documents	2008	2
Non-citable documents	2009	5
Non-citable documents	2010	3
Non-citable documents	2011	3
Citable documents	1999	434
Citable documents	2000	344
Citable documents	2001	240
Citable documents	2002	128
Citable documents	2003	129
Citable documents	2004	151
Citable documents	2005	174
Citable documents	2006	174
Citable documents	2007	197
Citable documents	2008	197
Citable documents	2009	210
Citable documents	2010	126
Citable documents	2011	67

Cited documents

Uncited documents

Ratio of a journal's items, grouped in three years windows, that have been cited at least once vs. those not cited during the following year.

Documents	Year	Value
Uncited documents	1999	429
Uncited documents	2000	332
Uncited documents	2001	233
Uncited documents	2002	125
Uncited documents	2003	126
Uncited documents	2004	150
Uncited documents	2005	170
Uncited documents	2006	163
Uncited documents	2007	192
Uncited documents	2008	193
Uncited documents	2009	210
Uncited documents	2010	123
Uncited documents	2011	68
Cited documents	1999	6
Cited documents	2000	12
Cited documents	2001	7
Cited documents	2002	3
Cited documents	2003	3
Cited documents	2004	1
Cited documents	2005	5
Cited documents	2006	12
Cited documents	2007	8
Cited documents	2008	6
Cited documents	2009	5
Cited documents	2010	6
Cited documents	2011	2

% Female Authors

Evolution of the percentage of female authors.

Year	Female Percent
1999	2.50
2000	3.57
2001	1.28
2002	3.06
2003	2.96
2004	6.19
2005	4.67
2006	4.94
2007	2.44
2008	4.39
2009	0.00
2010	0.00
2011	0.00

Documents cited by public policy (Overton)

Evolution of the number of documents cited by public policy documents according to Overton database.

Documents	Year	Value
Overton	1999	0
Overton	2000	0
Overton	2001	0
Overton	2002	0
Overton	2003	0
Overton	2004	0
Overton	2005	0
Overton	2006	0
Overton	2007	0
Overton	2008	0
Overton	2009	0
Overton	2010	0
Overton	2011	0