International Journal of Systems Science

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
Computer Science Applications	1997	Q2
Computer Science Applications	1998	Q2
Computer Science Applications	1999	Q2
Computer Science Applications	2000	Q2
Computer Science Applications	2001	Q2
Computer Science Applications	2002	Q3
Computer Science Applications	2003	Q3
Computer Science Applications	2004	Q3
Computer Science Applications	2005	Q3
Computer Science Applications	2006	Q3
Computer Science Applications	2007	Q3
Computer Science Applications	2008	Q2
Computer Science Applications	2009	Q2
Computer Science Applications	2010	Q2
Computer Science Applications	2011	Q1
Computer Science Applications	2012	Q1
Computer Science Applications	2013	Q2
Computer Science Applications	2014	Q1
Computer Science Applications	2015	Q1
Computer Science Applications	2016	Q1
Control and Systems Engineering	1997	Q1
Control and Systems Engineering	1998	Q2
Control and Systems Engineering	1999	Q2
Control and Systems Engineering	2000	Q2
Control and Systems Engineering	2001	Q2
Control and Systems Engineering	2002	Q2
Control and Systems Engineering	2003	Q2
Control and Systems Engineering	2004	Q2
Control and Systems Engineering	2005	Q2
Control and Systems Engineering	2006	Q2
Control and Systems Engineering	2007	Q2
Control and Systems Engineering	2008	Q2
Control and Systems Engineering	2009	Q2
Control and Systems Engineering	2010	Q2
Control and Systems Engineering	2011	Q1
Control and Systems Engineering	2012	Q1
Control and Systems Engineering	2013	Q2
Control and Systems Engineering	2014	Q1
Control and Systems Engineering	2015	Q1
Control and Systems Engineering	2016	Q1
Theoretical Computer Science	1997	Q2
Theoretical Computer Science	1998	Q2
Theoretical Computer Science	1999	Q2
Theoretical Computer Science	2000	Q2
Theoretical Computer Science	2001	Q2
Theoretical Computer Science	2002	Q3
Theoretical Computer Science	2003	Q3
Theoretical Computer Science	2004	Q3
Theoretical Computer Science	2005	Q3
Theoretical Computer Science	2006	Q3
Theoretical Computer Science	2007	Q3
Theoretical Computer Science	2008	Q3
Theoretical Computer Science	2009	Q2
Theoretical Computer Science	2010	Q2
Theoretical Computer Science	2011	Q2
Theoretical Computer Science	2012	Q2
Theoretical Computer Science	2013	Q2
Theoretical Computer Science	2014	Q1
Theoretical Computer Science	2015	Q1
Theoretical Computer Science	2016	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	0.379
2000	0.489
2001	0.510
2002	0.442
2003	0.389
2004	0.404
2005	0.308
2006	0.332
2007	0.386
2008	0.486
2009	0.615
2010	0.697
2011	0.791
2012	0.902
2013	0.791
2014	1.027
2015	1.044
2016	0.848

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	0.399
Cites / Doc. (4 years)	2000	0.406
Cites / Doc. (4 years)	2001	0.537
Cites / Doc. (4 years)	2002	0.468
Cites / Doc. (4 years)	2003	0.471
Cites / Doc. (4 years)	2004	0.727
Cites / Doc. (4 years)	2005	0.705
Cites / Doc. (4 years)	2006	0.713
Cites / Doc. (4 years)	2007	0.742
Cites / Doc. (4 years)	2008	1.054
Cites / Doc. (4 years)	2009	1.345
Cites / Doc. (4 years)	2010	1.571
Cites / Doc. (4 years)	2011	1.969
Cites / Doc. (4 years)	2012	2.021
Cites / Doc. (4 years)	2013	2.056
Cites / Doc. (4 years)	2014	2.260
Cites / Doc. (4 years)	2015	2.260
Cites / Doc. (4 years)	2016	2.228
Cites / Doc. (3 years)	1999	0.399
Cites / Doc. (3 years)	2000	0.395
Cites / Doc. (3 years)	2001	0.505
Cites / Doc. (3 years)	2002	0.479
Cites / Doc. (3 years)	2003	0.482
Cites / Doc. (3 years)	2004	0.719
Cites / Doc. (3 years)	2005	0.607
Cites / Doc. (3 years)	2006	0.642
Cites / Doc. (3 years)	2007	0.725
Cites / Doc. (3 years)	2008	1.080
Cites / Doc. (3 years)	2009	1.326
Cites / Doc. (3 years)	2010	1.661
Cites / Doc. (3 years)	2011	1.810
Cites / Doc. (3 years)	2012	1.889
Cites / Doc. (3 years)	2013	2.040
Cites / Doc. (3 years)	2014	2.325
Cites / Doc. (3 years)	2015	2.242
Cites / Doc. (3 years)	2016	2.352
Cites / Doc. (2 years)	1999	0.358
Cites / Doc. (2 years)	2000	0.315
Cites / Doc. (2 years)	2001	0.436
Cites / Doc. (2 years)	2002	0.493
Cites / Doc. (2 years)	2003	0.406
Cites / Doc. (2 years)	2004	0.577
Cites / Doc. (2 years)	2005	0.435
Cites / Doc. (2 years)	2006	0.557
Cites / Doc. (2 years)	2007	0.756
Cites / Doc. (2 years)	2008	0.888
Cites / Doc. (2 years)	2009	1.328
Cites / Doc. (2 years)	2010	1.460
Cites / Doc. (2 years)	2011	1.419
Cites / Doc. (2 years)	2012	1.782
Cites / Doc. (2 years)	2013	1.944
Cites / Doc. (2 years)	2014	2.351
Cites / Doc. (2 years)	2015	2.173
Cites / Doc. (2 years)	2016	2.256

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	25
Self Cites	2000	26
Self Cites	2001	14
Self Cites	2002	21
Self Cites	2003	10
Self Cites	2004	9
Self Cites	2005	8
Self Cites	2006	8
Self Cites	2007	15
Self Cites	2008	25
Self Cites	2009	33
Self Cites	2010	96
Self Cites	2011	122
Self Cites	2012	174
Self Cites	2013	300
Self Cites	2014	259
Self Cites	2015	268
Self Cites	2016	245
Total Cites	1999	169
Total Cites	2000	150
Total Cites	2001	204
Total Cites	2002	186
Total Cites	2003	197
Total Cites	2004	241
Total Cites	2005	179
Total Cites	2006	158
Total Cites	2007	182
Total Cites	2008	282
Total Cites	2009	358
Total Cites	2010	495
Total Cites	2011	610
Total Cites	2012	784
Total Cites	2013	1016
Total Cites	2014	1323
Total Cites	2015	1334
Total Cites	2016	1505

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	0.340
External Cites per document	2000	0.326
External Cites per document	2001	0.470
External Cites per document	2002	0.425
External Cites per document	2003	0.457
External Cites per document	2004	0.693
External Cites per document	2005	0.580
External Cites per document	2006	0.610
External Cites per document	2007	0.665
External Cites per document	2008	0.985
External Cites per document	2009	1.204
External Cites per document	2010	1.339
External Cites per document	2011	1.448
External Cites per document	2012	1.470
External Cites per document	2013	1.438
External Cites per document	2014	1.870
External Cites per document	2015	1.792
External Cites per document	2016	1.969
Cites per document	1999	0.399
Cites per document	2000	0.395
Cites per document	2001	0.505
Cites per document	2002	0.479
Cites per document	2003	0.482
Cites per document	2004	0.719
Cites per document	2005	0.607
Cites per document	2006	0.642
Cites per document	2007	0.725
Cites per document	2008	1.080
Cites per document	2009	1.326
Cites per document	2010	1.661
Cites per document	2011	1.810
Cites per document	2012	1.889
Cites per document	2013	2.040
Cites per document	2014	2.325
Cites per document	2015	2.242
Cites per document	2016	2.352

% 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	10.83
2000	12.82
2001	8.70
2002	6.99
2003	33.33
2004	21.05
2005	35.79
2006	32.95
2007	22.99
2008	28.16
2009	25.86
2010	29.69
2011	27.17
2012	20.92
2013	19.90
2014	21.52
2015	21.16
2016	24.62

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	2
Non-citable documents	2000	0
Non-citable documents	2001	3
Non-citable documents	2002	3
Non-citable documents	2003	5
Non-citable documents	2004	4
Non-citable documents	2005	5
Non-citable documents	2006	6
Non-citable documents	2007	8
Non-citable documents	2008	9
Non-citable documents	2009	8
Non-citable documents	2010	8
Non-citable documents	2011	10
Non-citable documents	2012	13
Non-citable documents	2013	10
Non-citable documents	2014	7
Non-citable documents	2015	20
Non-citable documents	2016	20
Citable documents	1999	424
Citable documents	2000	380
Citable documents	2001	404
Citable documents	2002	388
Citable documents	2003	409
Citable documents	2004	335
Citable documents	2005	295
Citable documents	2006	246
Citable documents	2007	251
Citable documents	2008	261
Citable documents	2009	270
Citable documents	2010	298
Citable documents	2011	337
Citable documents	2012	415
Citable documents	2013	498
Citable documents	2014	569
Citable documents	2015	595
Citable documents	2016	640

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	319
Uncited documents	2000	278
Uncited documents	2001	282
Uncited documents	2002	278
Uncited documents	2003	295
Uncited documents	2004	228
Uncited documents	2005	197
Uncited documents	2006	165
Uncited documents	2007	170
Uncited documents	2008	147
Uncited documents	2009	134
Uncited documents	2010	135
Uncited documents	2011	142
Uncited documents	2012	156
Uncited documents	2013	172
Uncited documents	2014	156
Uncited documents	2015	187
Uncited documents	2016	194
Cited documents	1999	107
Cited documents	2000	102
Cited documents	2001	125
Cited documents	2002	113
Cited documents	2003	119
Cited documents	2004	111
Cited documents	2005	103
Cited documents	2006	87
Cited documents	2007	89
Cited documents	2008	123
Cited documents	2009	144
Cited documents	2010	171
Cited documents	2011	205
Cited documents	2012	272
Cited documents	2013	336
Cited documents	2014	420
Cited documents	2015	428
Cited documents	2016	466

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Country	United Kingdom	56 H Index
Subject Area and Category	Computer Science Computer Science Applications Engineering Control and Systems Engineering Mathematics Theoretical Computer Science
Publisher	Taylor & Francis
Publication type	Journals
ISSN	00207721, 14645319
Coverage	1972-1991, 1995-ongoing
Scope	Modern systems are becoming more and more complex and sophisticated in their demand for performance, reliability and increasing autonomy. Historically, highly analytic and numeric based methods have sufficed, frequently simplifying the problem to allow analytical tractability. Many manufactured and natural systems (biological, ecological and socio-economic) cannot be adequately represented quantitively alone; qualitations and heuristics, linguistics etc., knowledge is frequently required within a common information-processing framework. A wide range of new theories, methodologies and techniques are required to "enable" such systems, and thus engineering and integration to deal with these demands. (source)