IEEE Transactions on Parallel and Distributed Systems

IEEE Transactions on Parallel and Distributed Systems (TPDS) is published monthly. It publishes a range of papers, comments on previously published papers, and survey articles that deal with the parallel and distributed systems research areas of current importance to our readers. Particular areas of interest include, but are not limited to: Parallel and distributed algorithms, focusing on topics such as: models of computation; numerical, combinatorial, and data-intensive parallel algorithms, scalability of algorithms and data structures for parallel and distributed systems, communication and synchronization protocols, network algorithms, scheduling, and load balancing. Applications of parallel and distributed computing, including computational and data-enabled science and engineering, big data applications, parallel crowd sourcing, large-scale social network analysis, management of big data, cloud and grid computing, scientific and biomedical applications, mobile computing, and cyber-physical systems. Parallel and distributed architectures, including architectures for instruction-level and thread-level parallelism; design, analysis, implementation, fault resilience and performance measurements of multiple-processor systems; multicore processors, heterogeneous many-core systems; petascale and exascale systems designs; novel big data architectures; special purpose architectures, including graphics processors, signal processors, network processors, media accelerators, and other special purpose processors and accelerators; impact of technology on architecture; network and interconnect architectures; parallel I/O and storage systems; architecture of the memory hierarchy; power-efficient and green computing architectures; dependable architectures; and performance modeling and evaluation.

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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
Computational Theory and Mathematics	1999	Q3
Computational Theory and Mathematics	2000	Q2
Computational Theory and Mathematics	2001	Q2
Computational Theory and Mathematics	2002	Q2
Computational Theory and Mathematics	2003	Q2
Computational Theory and Mathematics	2004	Q2
Computational Theory and Mathematics	2005	Q1
Computational Theory and Mathematics	2006	Q2
Computational Theory and Mathematics	2007	Q2
Computational Theory and Mathematics	2008	Q2
Computational Theory and Mathematics	2009	Q2
Computational Theory and Mathematics	2010	Q2
Computational Theory and Mathematics	2011	Q2
Computational Theory and Mathematics	2012	Q2
Computational Theory and Mathematics	2013	Q2
Computational Theory and Mathematics	2014	Q2
Computational Theory and Mathematics	2015	Q1
Computational Theory and Mathematics	2016	Q1
Computational Theory and Mathematics	2017	Q1
Computational Theory and Mathematics	2018	Q1
Computational Theory and Mathematics	2019	Q1
Computational Theory and Mathematics	2020	Q2
Computational Theory and Mathematics	2021	Q1
Computational Theory and Mathematics	2022	Q1
Computational Theory and Mathematics	2023	Q1
Hardware and Architecture	1999	Q1
Hardware and Architecture	2000	Q1
Hardware and Architecture	2001	Q1
Hardware and Architecture	2002	Q1
Hardware and Architecture	2003	Q1
Hardware and Architecture	2004	Q1
Hardware and Architecture	2005	Q1
Hardware and Architecture	2006	Q1
Hardware and Architecture	2007	Q1
Hardware and Architecture	2008	Q1
Hardware and Architecture	2009	Q1
Hardware and Architecture	2010	Q1
Hardware and Architecture	2011	Q1
Hardware and Architecture	2012	Q1
Hardware and Architecture	2013	Q1
Hardware and Architecture	2014	Q1
Hardware and Architecture	2015	Q1
Hardware and Architecture	2016	Q1
Hardware and Architecture	2017	Q1
Hardware and Architecture	2018	Q1
Hardware and Architecture	2019	Q1
Hardware and Architecture	2020	Q1
Hardware and Architecture	2021	Q1
Hardware and Architecture	2022	Q1
Hardware and Architecture	2023	Q1
Signal Processing	1999	Q3
Signal Processing	2000	Q2
Signal Processing	2001	Q2
Signal Processing	2002	Q2
Signal Processing	2003	Q2
Signal Processing	2004	Q1
Signal Processing	2005	Q1
Signal Processing	2006	Q1
Signal Processing	2007	Q2
Signal Processing	2008	Q1
Signal Processing	2009	Q1
Signal Processing	2010	Q1
Signal Processing	2011	Q2
Signal Processing	2012	Q2
Signal Processing	2013	Q1
Signal Processing	2014	Q1
Signal Processing	2015	Q1
Signal Processing	2016	Q1
Signal Processing	2017	Q1
Signal Processing	2018	Q1
Signal Processing	2019	Q1
Signal Processing	2020	Q2
Signal Processing	2021	Q1
Signal Processing	2022	Q1
Signal Processing	2023	Q1

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	0.449
2000	0.645
2001	0.840
2002	0.837
2003	0.780
2004	0.883
2005	0.996
2006	0.931
2007	0.891
2008	0.866
2009	0.809
2010	0.809
2011	0.725
2012	0.757
2013	0.843
2014	0.950
2015	1.093
2016	0.998
2017	0.983
2018	0.875
2019	0.929
2020	0.760
2021	1.304
2022	1.890
2023	2.340

Total Documents

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

Year	Documents
1999	91
2000	92
2001	92
2002	94
2003	103
2004	89
2005	99
2006	123
2007	137
2008	128
2009	138
2010	141
2011	179
2012	234
2013	226
2014	309
2015	283
2016	275
2017	265
2018	206
2019	199
2020	211
2021	233
2022	353
2023	238

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	1.160
Cites / Doc. (4 years)	2000	1.554
Cites / Doc. (4 years)	2001	1.643
Cites / Doc. (4 years)	2002	1.894
Cites / Doc. (4 years)	2003	2.152
Cites / Doc. (4 years)	2004	2.874
Cites / Doc. (4 years)	2005	3.741
Cites / Doc. (4 years)	2006	3.712
Cites / Doc. (4 years)	2007	3.319
Cites / Doc. (4 years)	2008	3.411
Cites / Doc. (4 years)	2009	3.795
Cites / Doc. (4 years)	2010	3.897
Cites / Doc. (4 years)	2011	3.950
Cites / Doc. (4 years)	2012	4.189
Cites / Doc. (4 years)	2013	4.269
Cites / Doc. (4 years)	2014	4.938
Cites / Doc. (4 years)	2015	5.476
Cites / Doc. (4 years)	2016	5.928
Cites / Doc. (4 years)	2017	6.484
Cites / Doc. (4 years)	2018	5.913
Cites / Doc. (4 years)	2019	5.097
Cites / Doc. (4 years)	2020	4.250
Cites / Doc. (4 years)	2021	4.127
Cites / Doc. (4 years)	2022	5.581
Cites / Doc. (4 years)	2023	5.947
Cites / Doc. (3 years)	1999	1.160
Cites / Doc. (3 years)	2000	1.472
Cites / Doc. (3 years)	2001	1.620
Cites / Doc. (3 years)	2002	1.822
Cites / Doc. (3 years)	2003	2.144
Cites / Doc. (3 years)	2004	2.927
Cites / Doc. (3 years)	2005	3.811
Cites / Doc. (3 years)	2006	3.340
Cites / Doc. (3 years)	2007	3.318
Cites / Doc. (3 years)	2008	3.209
Cites / Doc. (3 years)	2009	3.678
Cites / Doc. (3 years)	2010	3.968
Cites / Doc. (3 years)	2011	3.631
Cites / Doc. (3 years)	2012	3.917
Cites / Doc. (3 years)	2013	4.330
Cites / Doc. (3 years)	2014	5.064
Cites / Doc. (3 years)	2015	5.291
Cites / Doc. (3 years)	2016	5.989
Cites / Doc. (3 years)	2017	6.334
Cites / Doc. (3 years)	2018	5.294
Cites / Doc. (3 years)	2019	4.617
Cites / Doc. (3 years)	2020	4.096
Cites / Doc. (3 years)	2021	4.099
Cites / Doc. (3 years)	2022	6.151
Cites / Doc. (3 years)	2023	6.158
Cites / Doc. (2 years)	1999	1.009
Cites / Doc. (2 years)	2000	1.396
Cites / Doc. (2 years)	2001	1.388
Cites / Doc. (2 years)	2002	1.592
Cites / Doc. (2 years)	2003	2.043
Cites / Doc. (2 years)	2004	2.812
Cites / Doc. (2 years)	2005	3.344
Cites / Doc. (2 years)	2006	3.191
Cites / Doc. (2 years)	2007	2.856
Cites / Doc. (2 years)	2008	2.900
Cites / Doc. (2 years)	2009	3.721
Cites / Doc. (2 years)	2010	3.444
Cites / Doc. (2 years)	2011	3.147
Cites / Doc. (2 years)	2012	3.938
Cites / Doc. (2 years)	2013	4.332
Cites / Doc. (2 years)	2014	4.683
Cites / Doc. (2 years)	2015	5.224
Cites / Doc. (2 years)	2016	5.546
Cites / Doc. (2 years)	2017	5.638
Cites / Doc. (2 years)	2018	4.728
Cites / Doc. (2 years)	2019	4.040
Cites / Doc. (2 years)	2020	3.840
Cites / Doc. (2 years)	2021	4.407
Cites / Doc. (2 years)	2022	6.167
Cites / Doc. (2 years)	2023	6.461

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	52
Self Cites	2000	54
Self Cites	2001	52
Self Cites	2002	32
Self Cites	2003	32
Self Cites	2004	33
Self Cites	2005	47
Self Cites	2006	42
Self Cites	2007	48
Self Cites	2008	46
Self Cites	2009	30
Self Cites	2010	38
Self Cites	2011	43
Self Cites	2012	71
Self Cites	2013	93
Self Cites	2014	134
Self Cites	2015	154
Self Cites	2016	134
Self Cites	2017	148
Self Cites	2018	120
Self Cites	2019	116
Self Cites	2020	133
Self Cites	2021	120
Self Cites	2022	258
Self Cites	2023	233
Total Cites	1999	378
Total Cites	2000	446
Total Cites	2001	460
Total Cites	2002	501
Total Cites	2003	596
Total Cites	2004	846
Total Cites	2005	1090
Total Cites	2006	972
Total Cites	2007	1032
Total Cites	2008	1152
Total Cites	2009	1427
Total Cites	2010	1599
Total Cites	2011	1478
Total Cites	2012	1794
Total Cites	2013	2399
Total Cites	2014	3236
Total Cites	2015	4069
Total Cites	2016	4899
Total Cites	2017	5492
Total Cites	2018	4357
Total Cites	2019	3444
Total Cites	2020	2744
Total Cites	2021	2525
Total Cites	2022	3955
Total Cites	2023	4908

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	1.000
External Cites per document	2000	1.294
External Cites per document	2001	1.437
External Cites per document	2002	1.705
External Cites per document	2003	2.029
External Cites per document	2004	2.813
External Cites per document	2005	3.647
External Cites per document	2006	3.196
External Cites per document	2007	3.164
External Cites per document	2008	3.081
External Cites per document	2009	3.601
External Cites per document	2010	3.873
External Cites per document	2011	3.526
External Cites per document	2012	3.762
External Cites per document	2013	4.162
External Cites per document	2014	4.854
External Cites per document	2015	5.091
External Cites per document	2016	5.825
External Cites per document	2017	6.164
External Cites per document	2018	5.148
External Cites per document	2019	4.461
External Cites per document	2020	3.897
External Cites per document	2021	3.904
External Cites per document	2022	5.750
External Cites per document	2023	5.866
Cites per document	1999	1.160
Cites per document	2000	1.472
Cites per document	2001	1.620
Cites per document	2002	1.822
Cites per document	2003	2.144
Cites per document	2004	2.927
Cites per document	2005	3.811
Cites per document	2006	3.340
Cites per document	2007	3.318
Cites per document	2008	3.209
Cites per document	2009	3.678
Cites per document	2010	3.968
Cites per document	2011	3.631
Cites per document	2012	3.917
Cites per document	2013	4.330
Cites per document	2014	5.064
Cites per document	2015	5.291
Cites per document	2016	5.989
Cites per document	2017	6.334
Cites per document	2018	5.294
Cites per document	2019	4.617
Cites per document	2020	4.096
Cites per document	2021	4.099
Cites per document	2022	6.151
Cites per document	2023	6.158

% 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	37.36
2000	43.48
2001	29.35
2002	25.53
2003	22.33
2004	20.22
2005	31.31
2006	33.33
2007	32.85
2008	29.69
2009	34.78
2010	36.88
2011	40.78
2012	41.45
2013	46.02
2014	52.43
2015	52.65
2016	42.55
2017	45.28
2018	45.63
2019	46.23
2020	52.13
2021	45.49
2022	42.78
2023	40.76

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	1
Non-citable documents	2001	1
Non-citable documents	2002	2
Non-citable documents	2003	3
Non-citable documents	2004	5
Non-citable documents	2005	6
Non-citable documents	2006	7
Non-citable documents	2007	12
Non-citable documents	2008	14
Non-citable documents	2009	14
Non-citable documents	2010	9
Non-citable documents	2011	11
Non-citable documents	2012	13
Non-citable documents	2013	14
Non-citable documents	2014	13
Non-citable documents	2015	10
Non-citable documents	2016	9
Non-citable documents	2017	5
Non-citable documents	2018	7
Non-citable documents	2019	5
Non-citable documents	2020	7
Non-citable documents	2021	4
Non-citable documents	2022	8
Non-citable documents	2023	6
Citable documents	1999	326
Citable documents	2000	302
Citable documents	2001	283
Citable documents	2002	273
Citable documents	2003	275
Citable documents	2004	284
Citable documents	2005	280
Citable documents	2006	284
Citable documents	2007	299
Citable documents	2008	345
Citable documents	2009	374
Citable documents	2010	394
Citable documents	2011	396
Citable documents	2012	445
Citable documents	2013	540
Citable documents	2014	626
Citable documents	2015	759
Citable documents	2016	809
Citable documents	2017	862
Citable documents	2018	816
Citable documents	2019	741
Citable documents	2020	663
Citable documents	2021	612
Citable documents	2022	635
Citable documents	2023	791

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	156
Uncited documents	2000	125
Uncited documents	2001	108
Uncited documents	2002	95
Uncited documents	2003	94
Uncited documents	2004	81
Uncited documents	2005	82
Uncited documents	2006	70
Uncited documents	2007	83
Uncited documents	2008	88
Uncited documents	2009	87
Uncited documents	2010	83
Uncited documents	2011	94
Uncited documents	2012	93
Uncited documents	2013	101
Uncited documents	2014	108
Uncited documents	2015	110
Uncited documents	2016	116
Uncited documents	2017	117
Uncited documents	2018	123
Uncited documents	2019	117
Uncited documents	2020	115
Uncited documents	2021	105
Uncited documents	2022	86
Uncited documents	2023	131
Cited documents	1999	170
Cited documents	2000	178
Cited documents	2001	176
Cited documents	2002	180
Cited documents	2003	184
Cited documents	2004	208
Cited documents	2005	204
Cited documents	2006	221
Cited documents	2007	228
Cited documents	2008	271
Cited documents	2009	301
Cited documents	2010	320
Cited documents	2011	313
Cited documents	2012	365
Cited documents	2013	453
Cited documents	2014	531
Cited documents	2015	659
Cited documents	2016	702
Cited documents	2017	750
Cited documents	2018	700
Cited documents	2019	629
Cited documents	2020	555
Cited documents	2021	511
Cited documents	2022	557
Cited documents	2023	666