Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering 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
Mechanical Engineering	1999	Q2
Mechanical Engineering	2000	Q1
Mechanical Engineering	2001	Q1
Mechanical Engineering	2002	Q1
Mechanical Engineering	2003	Q1
Mechanical Engineering	2004	Q1
Mechanical Engineering	2005	Q1
Mechanical Engineering	2006	Q1
Mechanical Engineering	2007	Q1
Mechanical Engineering	2008	Q2
Mechanical Engineering	2009	Q2
Mechanical Engineering	2010	Q1
Mechanical Engineering	2011	Q1
Mechanical Engineering	2012	Q1
Mechanical Engineering	2013	Q1
Mechanical Engineering	2014	Q2
Mechanical Engineering	2015	Q2
Mechanical Engineering	2016	Q1
Mechanical Engineering	2017	Q2
Mechanical Engineering	2018	Q2
Mechanical Engineering	2019	Q2
Mechanical Engineering	2020	Q2
Mechanical Engineering	2021	Q2
Mechanical Engineering	2022	Q2
Mechanical Engineering	2023	Q2
Surfaces and Interfaces	1999	Q3
Surfaces and Interfaces	2000	Q2
Surfaces and Interfaces	2001	Q2
Surfaces and Interfaces	2002	Q2
Surfaces and Interfaces	2003	Q1
Surfaces and Interfaces	2004	Q2
Surfaces and Interfaces	2005	Q2
Surfaces and Interfaces	2006	Q2
Surfaces and Interfaces	2007	Q2
Surfaces and Interfaces	2008	Q2
Surfaces and Interfaces	2009	Q2
Surfaces and Interfaces	2010	Q2
Surfaces and Interfaces	2011	Q2
Surfaces and Interfaces	2012	Q2
Surfaces and Interfaces	2013	Q2
Surfaces and Interfaces	2014	Q2
Surfaces and Interfaces	2015	Q2
Surfaces and Interfaces	2016	Q2
Surfaces and Interfaces	2017	Q2
Surfaces and Interfaces	2018	Q2
Surfaces and Interfaces	2019	Q2
Surfaces and Interfaces	2020	Q3
Surfaces and Interfaces	2021	Q3
Surfaces and Interfaces	2022	Q3
Surfaces and Interfaces	2023	Q3
Surfaces, Coatings and Films	1999	Q2
Surfaces, Coatings and Films	2000	Q2
Surfaces, Coatings and Films	2001	Q2
Surfaces, Coatings and Films	2002	Q1
Surfaces, Coatings and Films	2003	Q1
Surfaces, Coatings and Films	2004	Q1
Surfaces, Coatings and Films	2005	Q2
Surfaces, Coatings and Films	2006	Q2
Surfaces, Coatings and Films	2007	Q1
Surfaces, Coatings and Films	2008	Q2
Surfaces, Coatings and Films	2009	Q2
Surfaces, Coatings and Films	2010	Q2
Surfaces, Coatings and Films	2011	Q2
Surfaces, Coatings and Films	2012	Q2
Surfaces, Coatings and Films	2013	Q2
Surfaces, Coatings and Films	2014	Q2
Surfaces, Coatings and Films	2015	Q2
Surfaces, Coatings and Films	2016	Q1
Surfaces, Coatings and Films	2017	Q1
Surfaces, Coatings and Films	2018	Q2
Surfaces, Coatings and Films	2019	Q2
Surfaces, Coatings and Films	2020	Q2
Surfaces, Coatings and Films	2021	Q2
Surfaces, Coatings and Films	2022	Q2
Surfaces, Coatings and Films	2023	Q2

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	0.526
2000	0.746
2001	0.779
2002	0.898
2003	1.739
2004	0.839
2005	0.648
2006	0.581
2007	0.787
2008	0.549
2009	0.569
2010	0.603
2011	0.696
2012	0.666
2013	0.685
2014	0.598
2015	0.611
2016	0.691
2017	0.725
2018	0.636
2019	0.507
2020	0.482
2021	0.411
2022	0.436
2023	0.442

Total Documents

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

Year	Documents
1999	41
2000	49
2001	52
2002	37
2003	42
2004	53
2005	42
2006	83
2007	84
2008	106
2009	116
2010	122
2011	126
2012	98
2013	132
2014	132
2015	125
2016	127
2017	131
2018	128
2019	154
2020	144
2021	213
2022	188
2023	159

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	0.535
Cites / Doc. (4 years)	2000	1.000
Cites / Doc. (4 years)	2001	0.901
Cites / Doc. (4 years)	2002	0.799
Cites / Doc. (4 years)	2003	1.207
Cites / Doc. (4 years)	2004	0.894
Cites / Doc. (4 years)	2005	0.962
Cites / Doc. (4 years)	2006	1.132
Cites / Doc. (4 years)	2007	0.886
Cites / Doc. (4 years)	2008	0.748
Cites / Doc. (4 years)	2009	0.876
Cites / Doc. (4 years)	2010	0.946
Cites / Doc. (4 years)	2011	1.026
Cites / Doc. (4 years)	2012	0.915
Cites / Doc. (4 years)	2013	1.167
Cites / Doc. (4 years)	2014	1.075
Cites / Doc. (4 years)	2015	1.092
Cites / Doc. (4 years)	2016	1.425
Cites / Doc. (4 years)	2017	1.459
Cites / Doc. (4 years)	2018	1.602
Cites / Doc. (4 years)	2019	1.750
Cites / Doc. (4 years)	2020	1.672
Cites / Doc. (4 years)	2021	1.873
Cites / Doc. (4 years)	2022	2.244
Cites / Doc. (4 years)	2023	2.333
Cites / Doc. (3 years)	1999	0.535
Cites / Doc. (3 years)	2000	1.107
Cites / Doc. (3 years)	2001	0.864
Cites / Doc. (3 years)	2002	0.810
Cites / Doc. (3 years)	2003	1.181
Cites / Doc. (3 years)	2004	0.870
Cites / Doc. (3 years)	2005	0.977
Cites / Doc. (3 years)	2006	1.109
Cites / Doc. (3 years)	2007	0.792
Cites / Doc. (3 years)	2008	0.636
Cites / Doc. (3 years)	2009	0.828
Cites / Doc. (3 years)	2010	0.912
Cites / Doc. (3 years)	2011	1.000
Cites / Doc. (3 years)	2012	0.885
Cites / Doc. (3 years)	2013	1.066
Cites / Doc. (3 years)	2014	1.020
Cites / Doc. (3 years)	2015	1.146
Cites / Doc. (3 years)	2016	1.422
Cites / Doc. (3 years)	2017	1.479
Cites / Doc. (3 years)	2018	1.593
Cites / Doc. (3 years)	2019	1.632
Cites / Doc. (3 years)	2020	1.634
Cites / Doc. (3 years)	2021	1.852
Cites / Doc. (3 years)	2022	2.237
Cites / Doc. (3 years)	2023	2.363
Cites / Doc. (2 years)	1999	0.577
Cites / Doc. (2 years)	2000	1.096
Cites / Doc. (2 years)	2001	0.789
Cites / Doc. (2 years)	2002	0.693
Cites / Doc. (2 years)	2003	1.090
Cites / Doc. (2 years)	2004	0.848
Cites / Doc. (2 years)	2005	0.674
Cites / Doc. (2 years)	2006	0.895
Cites / Doc. (2 years)	2007	0.568
Cites / Doc. (2 years)	2008	0.539
Cites / Doc. (2 years)	2009	0.800
Cites / Doc. (2 years)	2010	0.883
Cites / Doc. (2 years)	2011	0.958
Cites / Doc. (2 years)	2012	0.827
Cites / Doc. (2 years)	2013	0.920
Cites / Doc. (2 years)	2014	1.096
Cites / Doc. (2 years)	2015	1.080
Cites / Doc. (2 years)	2016	1.424
Cites / Doc. (2 years)	2017	1.417
Cites / Doc. (2 years)	2018	1.287
Cites / Doc. (2 years)	2019	1.610
Cites / Doc. (2 years)	2020	1.621
Cites / Doc. (2 years)	2021	1.836
Cites / Doc. (2 years)	2022	2.319
Cites / Doc. (2 years)	2023	2.314

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	3
Self Cites	2000	22
Self Cites	2001	22
Self Cites	2002	16
Self Cites	2003	16
Self Cites	2004	18
Self Cites	2005	14
Self Cites	2006	22
Self Cites	2007	22
Self Cites	2008	13
Self Cites	2009	46
Self Cites	2010	46
Self Cites	2011	39
Self Cites	2012	33
Self Cites	2013	44
Self Cites	2014	53
Self Cites	2015	35
Self Cites	2016	68
Self Cites	2017	65
Self Cites	2018	45
Self Cites	2019	58
Self Cites	2020	62
Self Cites	2021	74
Self Cites	2022	104
Self Cites	2023	139
Total Cites	1999	54
Total Cites	2000	124
Total Cites	2001	114
Total Cites	2002	115
Total Cites	2003	163
Total Cites	2004	114
Total Cites	2005	129
Total Cites	2006	152
Total Cites	2007	141
Total Cites	2008	133
Total Cites	2009	226
Total Cites	2010	279
Total Cites	2011	344
Total Cites	2012	322
Total Cites	2013	369
Total Cites	2014	363
Total Cites	2015	415
Total Cites	2016	553
Total Cites	2017	568
Total Cites	2018	610
Total Cites	2019	630
Total Cites	2020	675
Total Cites	2021	789
Total Cites	2022	1143
Total Cites	2023	1288

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	0.505
External Cites per document	2000	0.911
External Cites per document	2001	0.697
External Cites per document	2002	0.697
External Cites per document	2003	1.065
External Cites per document	2004	0.733
External Cites per document	2005	0.871
External Cites per document	2006	0.949
External Cites per document	2007	0.669
External Cites per document	2008	0.574
External Cites per document	2009	0.659
External Cites per document	2010	0.761
External Cites per document	2011	0.887
External Cites per document	2012	0.794
External Cites per document	2013	0.939
External Cites per document	2014	0.871
External Cites per document	2015	1.050
External Cites per document	2016	1.247
External Cites per document	2017	1.310
External Cites per document	2018	1.475
External Cites per document	2019	1.482
External Cites per document	2020	1.484
External Cites per document	2021	1.678
External Cites per document	2022	2.033
External Cites per document	2023	2.108
Cites per document	1999	0.535
Cites per document	2000	1.107
Cites per document	2001	0.864
Cites per document	2002	0.810
Cites per document	2003	1.181
Cites per document	2004	0.870
Cites per document	2005	0.977
Cites per document	2006	1.109
Cites per document	2007	0.792
Cites per document	2008	0.636
Cites per document	2009	0.828
Cites per document	2010	0.912
Cites per document	2011	1.000
Cites per document	2012	0.885
Cites per document	2013	1.066
Cites per document	2014	1.020
Cites per document	2015	1.146
Cites per document	2016	1.422
Cites per document	2017	1.479
Cites per document	2018	1.593
Cites per document	2019	1.632
Cites per document	2020	1.634
Cites per document	2021	1.852
Cites per document	2022	2.237
Cites per document	2023	2.363

% 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	7.32
2000	4.08
2001	11.54
2002	16.22
2003	21.43
2004	13.21
2005	21.43
2006	24.10
2007	17.86
2008	19.81
2009	16.38
2010	19.67
2011	19.05
2012	21.43
2013	22.73
2014	14.39
2015	23.20
2016	17.32
2017	16.79
2018	14.06
2019	17.53
2020	13.19
2021	14.55
2022	13.83
2023	14.47

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	3
Non-citable documents	2003	4
Non-citable documents	2004	5
Non-citable documents	2005	4
Non-citable documents	2006	7
Non-citable documents	2007	14
Non-citable documents	2008	15
Non-citable documents	2009	14
Non-citable documents	2010	12
Non-citable documents	2011	15
Non-citable documents	2012	30
Non-citable documents	2013	28
Non-citable documents	2014	32
Non-citable documents	2015	19
Non-citable documents	2016	21
Non-citable documents	2017	12
Non-citable documents	2018	9
Non-citable documents	2019	3
Non-citable documents	2020	2
Non-citable documents	2021	1
Non-citable documents	2022	8
Non-citable documents	2023	9
Citable documents	1999	100
Citable documents	2000	112
Citable documents	2001	132
Citable documents	2002	139
Citable documents	2003	134
Citable documents	2004	126
Citable documents	2005	128
Citable documents	2006	130
Citable documents	2007	164
Citable documents	2008	194
Citable documents	2009	259
Citable documents	2010	294
Citable documents	2011	329
Citable documents	2012	334
Citable documents	2013	318
Citable documents	2014	324
Citable documents	2015	343
Citable documents	2016	368
Citable documents	2017	372
Citable documents	2018	374
Citable documents	2019	383
Citable documents	2020	411
Citable documents	2021	425
Citable documents	2022	503
Citable documents	2023	536

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	68
Uncited documents	2000	53
Uncited documents	2001	71
Uncited documents	2002	79
Uncited documents	2003	67
Uncited documents	2004	76
Uncited documents	2005	76
Uncited documents	2006	74
Uncited documents	2007	110
Uncited documents	2008	131
Uncited documents	2009	162
Uncited documents	2010	165
Uncited documents	2011	179
Uncited documents	2012	203
Uncited documents	2013	181
Uncited documents	2014	179
Uncited documents	2015	163
Uncited documents	2016	152
Uncited documents	2017	146
Uncited documents	2018	144
Uncited documents	2019	140
Uncited documents	2020	129
Uncited documents	2021	128
Uncited documents	2022	110
Uncited documents	2023	139
Cited documents	1999	33
Cited documents	2000	59
Cited documents	2001	61
Cited documents	2002	63
Cited documents	2003	71
Cited documents	2004	55
Cited documents	2005	56
Cited documents	2006	63
Cited documents	2007	68
Cited documents	2008	78
Cited documents	2009	111
Cited documents	2010	141
Cited documents	2011	165
Cited documents	2012	161
Cited documents	2013	165
Cited documents	2014	177
Cited documents	2015	199
Cited documents	2016	237
Cited documents	2017	238
Cited documents	2018	239
Cited documents	2019	246
Cited documents	2020	284
Cited documents	2021	298
Cited documents	2022	401
Cited documents	2023	406

% Female Authors

Evolution of the percentage of female authors.

Year	Female Percent
1999	2.63
2000	10.00
2001	6.06
2002	4.55
2003	11.11
2004	9.59
2005	10.53
2006	11.94
2007	12.03
2008	14.36
2009	17.19
2010	17.00
2011	16.53
2012	20.00
2013	15.63
2014	19.03
2015	16.33
2016	22.41
2017	18.70
2018	21.71
2019	22.99
2020	21.41
2021	22.42
2022	20.64
2023	23.54

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	3
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
Overton	2012	1
Overton	2013	1
Overton	2014	1
Overton	2015	1
Overton	2016	2
Overton	2017	0
Overton	2018	0
Overton	2019	0
Overton	2020	0
Overton	2021	0
Overton	2022	0
Overton	2023	1