Computer Systems Science and Engineering

Whilst considerable progress has been made in the development of computer hardware, the construction of large software or software/hardware systems still remains a challenging area. The issues multiply further when there is a need to achieve greater flexibility through the use of distributed systems, much greater computing power through the use of multiple processors and new architectures, greater reliability through the use of fault tolerance and greater capability though the use of intelligent components. These areas of research and development activity belong to the developing discipline which known as computer systems. Modern computer systems do not confine themselves to any one of these areas, but draw them together in various combinations. CSSE is devoted to theoretical developments in computer systems science and their applications in computer systems engineering. The journal covers the intense research activity that is being carried out in the systems field in both theoretical and practical hardware and software problems, together with the substantial amount of work being carried out within industry on the engineering, implementation and development of such systems. Original research papers, state-of-art reviews and technical notes are published regularly. Research notes, new development experience and application papers are an important part of the journal’s all-round coverage of the subject; industrial developments and new products are also monitored. A conference calendar, reviews of new books and reports of important meetings from around the world keep the reader fully informed.

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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 (miscellaneous)	1999	Q4
Computer Science (miscellaneous)	2000	Q3
Computer Science (miscellaneous)	2001	Q2
Computer Science (miscellaneous)	2002	Q3
Computer Science (miscellaneous)	2003	Q2
Computer Science (miscellaneous)	2004	Q3
Computer Science (miscellaneous)	2005	Q3
Computer Science (miscellaneous)	2006	Q3
Computer Science (miscellaneous)	2007	Q2
Computer Science (miscellaneous)	2008	Q3
Computer Science (miscellaneous)	2009	Q3
Computer Science (miscellaneous)	2010	Q3
Computer Science (miscellaneous)	2011	Q2
Computer Science (miscellaneous)	2012	Q4
Computer Science (miscellaneous)	2013	Q2
Computer Science (miscellaneous)	2014	Q3
Computer Science (miscellaneous)	2015	Q3
Computer Science (miscellaneous)	2016	Q3
Computer Science (miscellaneous)	2017	Q2
Computer Science (miscellaneous)	2018	Q3
Computer Science (miscellaneous)	2019	Q3
Computer Science (miscellaneous)	2020	Q3
Computer Science (miscellaneous)	2021	Q3
Computer Science (miscellaneous)	2022	Q3
Computer Science (miscellaneous)	2023	Q3
Control and Systems Engineering	1999	Q3
Control and Systems Engineering	2000	Q3
Control and Systems Engineering	2001	Q3
Control and Systems Engineering	2002	Q3
Control and Systems Engineering	2003	Q3
Control and Systems Engineering	2004	Q3
Control and Systems Engineering	2005	Q3
Control and Systems Engineering	2006	Q3
Control and Systems Engineering	2007	Q2
Control and Systems Engineering	2008	Q3
Control and Systems Engineering	2009	Q4
Control and Systems Engineering	2010	Q4
Control and Systems Engineering	2011	Q3
Control and Systems Engineering	2012	Q4
Control and Systems Engineering	2013	Q3
Control and Systems Engineering	2014	Q3
Control and Systems Engineering	2015	Q3
Control and Systems Engineering	2016	Q3
Control and Systems Engineering	2017	Q3
Control and Systems Engineering	2018	Q3
Control and Systems Engineering	2019	Q4
Control and Systems Engineering	2020	Q4
Control and Systems Engineering	2021	Q3
Control and Systems Engineering	2022	Q3
Control and Systems Engineering	2023	Q3
Theoretical Computer Science	1999	Q4
Theoretical Computer Science	2000	Q4
Theoretical Computer Science	2001	Q4
Theoretical Computer Science	2002	Q4
Theoretical Computer Science	2003	Q3
Theoretical Computer Science	2004	Q4
Theoretical Computer Science	2005	Q4
Theoretical Computer Science	2006	Q4
Theoretical Computer Science	2007	Q4
Theoretical Computer Science	2008	Q4
Theoretical Computer Science	2009	Q4
Theoretical Computer Science	2010	Q4
Theoretical Computer Science	2011	Q4
Theoretical Computer Science	2012	Q4
Theoretical Computer Science	2013	Q4
Theoretical Computer Science	2014	Q4
Theoretical Computer Science	2015	Q4
Theoretical Computer Science	2016	Q4
Theoretical Computer Science	2017	Q4
Theoretical Computer Science	2018	Q4
Theoretical Computer Science	2019	Q4
Theoretical Computer Science	2020	Q4
Theoretical Computer Science	2021	Q4
Theoretical Computer Science	2022	Q4
Theoretical Computer Science	2023	Q3

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	0.117
2000	0.179
2001	0.271
2002	0.294
2003	0.331
2004	0.188
2005	0.140
2006	0.173
2007	0.260
2008	0.249
2009	0.159
2010	0.156
2011	0.241
2012	0.107
2013	0.236
2014	0.239
2015	0.224
2016	0.217
2017	0.252
2018	0.220
2019	0.190
2020	0.190
2021	0.316
2022	0.323
2023	0.357

Total Documents

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

Year	Documents
1999	33
2000	38
2001	36
2002	33
2003	36
2004	32
2005	42
2006	38
2007	32
2008	36
2009	31
2010	38
2011	47
2012	27
2013	30
2014	37
2015	35
2016	38
2017	42
2018	43
2019	33
2020	45
2021	213
2022	319
2023	664

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	0.121
Cites / Doc. (4 years)	2000	0.322
Cites / Doc. (4 years)	2001	0.449
Cites / Doc. (4 years)	2002	0.545
Cites / Doc. (4 years)	2003	0.657
Cites / Doc. (4 years)	2004	0.762
Cites / Doc. (4 years)	2005	0.606
Cites / Doc. (4 years)	2006	0.524
Cites / Doc. (4 years)	2007	0.547
Cites / Doc. (4 years)	2008	0.507
Cites / Doc. (4 years)	2009	0.554
Cites / Doc. (4 years)	2010	0.431
Cites / Doc. (4 years)	2011	0.708
Cites / Doc. (4 years)	2012	0.230
Cites / Doc. (4 years)	2013	0.497
Cites / Doc. (4 years)	2014	0.535
Cites / Doc. (4 years)	2015	0.326
Cites / Doc. (4 years)	2016	0.403
Cites / Doc. (4 years)	2017	0.836
Cites / Doc. (4 years)	2018	0.559
Cites / Doc. (4 years)	2019	0.525
Cites / Doc. (4 years)	2020	0.865
Cites / Doc. (4 years)	2021	2.399
Cites / Doc. (4 years)	2022	2.015
Cites / Doc. (4 years)	2023	2.584
Cites / Doc. (3 years)	1999	0.121
Cites / Doc. (3 years)	2000	0.358
Cites / Doc. (3 years)	2001	0.532
Cites / Doc. (3 years)	2002	0.626
Cites / Doc. (3 years)	2003	0.748
Cites / Doc. (3 years)	2004	0.505
Cites / Doc. (3 years)	2005	0.574
Cites / Doc. (3 years)	2006	0.591
Cites / Doc. (3 years)	2007	0.643
Cites / Doc. (3 years)	2008	0.545
Cites / Doc. (3 years)	2009	0.528
Cites / Doc. (3 years)	2010	0.354
Cites / Doc. (3 years)	2011	0.800
Cites / Doc. (3 years)	2012	0.198
Cites / Doc. (3 years)	2013	0.518
Cites / Doc. (3 years)	2014	0.577
Cites / Doc. (3 years)	2015	0.340
Cites / Doc. (3 years)	2016	0.431
Cites / Doc. (3 years)	2017	1.027
Cites / Doc. (3 years)	2018	0.565
Cites / Doc. (3 years)	2019	0.537
Cites / Doc. (3 years)	2020	1.000
Cites / Doc. (3 years)	2021	3.050
Cites / Doc. (3 years)	2022	2.254
Cites / Doc. (3 years)	2023	2.650
Cites / Doc. (2 years)	1999	0.145
Cites / Doc. (2 years)	2000	0.465
Cites / Doc. (2 years)	2001	0.676
Cites / Doc. (2 years)	2002	0.689
Cites / Doc. (2 years)	2003	0.522
Cites / Doc. (2 years)	2004	0.464
Cites / Doc. (2 years)	2005	0.632
Cites / Doc. (2 years)	2006	0.703
Cites / Doc. (2 years)	2007	0.688
Cites / Doc. (2 years)	2008	0.300
Cites / Doc. (2 years)	2009	0.368
Cites / Doc. (2 years)	2010	0.373
Cites / Doc. (2 years)	2011	0.783
Cites / Doc. (2 years)	2012	0.235
Cites / Doc. (2 years)	2013	0.527
Cites / Doc. (2 years)	2014	0.386
Cites / Doc. (2 years)	2015	0.299
Cites / Doc. (2 years)	2016	0.403
Cites / Doc. (2 years)	2017	1.219
Cites / Doc. (2 years)	2018	0.525
Cites / Doc. (2 years)	2019	0.388
Cites / Doc. (2 years)	2020	1.316
Cites / Doc. (2 years)	2021	4.500
Cites / Doc. (2 years)	2022	2.190
Cites / Doc. (2 years)	2023	2.692

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	0
Self Cites	2001	2
Self Cites	2002	2
Self Cites	2003	0
Self Cites	2004	5
Self Cites	2005	0
Self Cites	2006	1
Self Cites	2007	1
Self Cites	2008	0
Self Cites	2009	0
Self Cites	2010	8
Self Cites	2011	44
Self Cites	2012	0
Self Cites	2013	24
Self Cites	2014	21
Self Cites	2015	17
Self Cites	2016	27
Self Cites	2017	39
Self Cites	2018	32
Self Cites	2019	8
Self Cites	2020	9
Self Cites	2021	24
Self Cites	2022	36
Self Cites	2023	160
Total Cites	1999	14
Total Cites	2000	39
Total Cites	2001	58
Total Cites	2002	67
Total Cites	2003	80
Total Cites	2004	53
Total Cites	2005	58
Total Cites	2006	65
Total Cites	2007	72
Total Cites	2008	61
Total Cites	2009	56
Total Cites	2010	35
Total Cites	2011	84
Total Cites	2012	23
Total Cites	2013	58
Total Cites	2014	60
Total Cites	2015	32
Total Cites	2016	44
Total Cites	2017	113
Total Cites	2018	65
Total Cites	2019	66
Total Cites	2020	118
Total Cites	2021	369
Total Cites	2022	656
Total Cites	2023	1529

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	0.121
External Cites per document	2000	0.358
External Cites per document	2001	0.514
External Cites per document	2002	0.607
External Cites per document	2003	0.748
External Cites per document	2004	0.457
External Cites per document	2005	0.574
External Cites per document	2006	0.582
External Cites per document	2007	0.634
External Cites per document	2008	0.545
External Cites per document	2009	0.528
External Cites per document	2010	0.273
External Cites per document	2011	0.381
External Cites per document	2012	0.198
External Cites per document	2013	0.304
External Cites per document	2014	0.375
External Cites per document	2015	0.160
External Cites per document	2016	0.167
External Cites per document	2017	0.673
External Cites per document	2018	0.287
External Cites per document	2019	0.472
External Cites per document	2020	0.924
External Cites per document	2021	2.851
External Cites per document	2022	2.131
External Cites per document	2023	2.373
Cites per document	1999	0.121
Cites per document	2000	0.358
Cites per document	2001	0.532
Cites per document	2002	0.626
Cites per document	2003	0.748
Cites per document	2004	0.505
Cites per document	2005	0.574
Cites per document	2006	0.591
Cites per document	2007	0.643
Cites per document	2008	0.545
Cites per document	2009	0.528
Cites per document	2010	0.354
Cites per document	2011	0.800
Cites per document	2012	0.198
Cites per document	2013	0.518
Cites per document	2014	0.577
Cites per document	2015	0.340
Cites per document	2016	0.431
Cites per document	2017	1.027
Cites per document	2018	0.565
Cites per document	2019	0.537
Cites per document	2020	1.000
Cites per document	2021	3.050
Cites per document	2022	2.254
Cites per document	2023	2.650

% 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	9.09
2000	5.26
2001	0.00
2002	6.06
2003	22.22
2004	9.38
2005	23.81
2006	15.79
2007	28.13
2008	27.78
2009	29.03
2010	18.42
2011	34.04
2012	40.74
2013	20.00
2014	13.51
2015	14.29
2016	23.68
2017	26.19
2018	23.26
2019	15.15
2020	13.33
2021	50.70
2022	36.99
2023	41.87

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	0
Non-citable documents	2000	0
Non-citable documents	2001	0
Non-citable documents	2002	1
Non-citable documents	2003	2
Non-citable documents	2004	3
Non-citable documents	2005	2
Non-citable documents	2006	5
Non-citable documents	2007	7
Non-citable documents	2008	9
Non-citable documents	2009	8
Non-citable documents	2010	6
Non-citable documents	2011	8
Non-citable documents	2012	6
Non-citable documents	2013	8
Non-citable documents	2014	5
Non-citable documents	2015	5
Non-citable documents	2016	4
Non-citable documents	2017	5
Non-citable documents	2018	7
Non-citable documents	2019	7
Non-citable documents	2020	6
Non-citable documents	2021	3
Non-citable documents	2022	1
Non-citable documents	2023	0
Citable documents	1999	116
Citable documents	2000	109
Citable documents	2001	109
Citable documents	2002	106
Citable documents	2003	105
Citable documents	2004	102
Citable documents	2005	99
Citable documents	2006	105
Citable documents	2007	105
Citable documents	2008	103
Citable documents	2009	98
Citable documents	2010	93
Citable documents	2011	97
Citable documents	2012	110
Citable documents	2013	104
Citable documents	2014	99
Citable documents	2015	89
Citable documents	2016	98
Citable documents	2017	105
Citable documents	2018	108
Citable documents	2019	116
Citable documents	2020	112
Citable documents	2021	118
Citable documents	2022	290
Citable documents	2023	577

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	105
Uncited documents	2000	87
Uncited documents	2001	83
Uncited documents	2002	79
Uncited documents	2003	81
Uncited documents	2004	75
Uncited documents	2005	79
Uncited documents	2006	80
Uncited documents	2007	78
Uncited documents	2008	81
Uncited documents	2009	74
Uncited documents	2010	76
Uncited documents	2011	61
Uncited documents	2012	99
Uncited documents	2013	77
Uncited documents	2014	69
Uncited documents	2015	68
Uncited documents	2016	71
Uncited documents	2017	60
Uncited documents	2018	72
Uncited documents	2019	92
Uncited documents	2020	71
Uncited documents	2021	32
Uncited documents	2022	96
Uncited documents	2023	171
Cited documents	1999	11
Cited documents	2000	22
Cited documents	2001	26
Cited documents	2002	28
Cited documents	2003	26
Cited documents	2004	30
Cited documents	2005	22
Cited documents	2006	30
Cited documents	2007	34
Cited documents	2008	31
Cited documents	2009	32
Cited documents	2010	23
Cited documents	2011	44
Cited documents	2012	17
Cited documents	2013	35
Cited documents	2014	35
Cited documents	2015	26
Cited documents	2016	31
Cited documents	2017	50
Cited documents	2018	43
Cited documents	2019	31
Cited documents	2020	47
Cited documents	2021	89
Cited documents	2022	195
Cited documents	2023	406