Hitachi Review

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
Electrical and Electronic Engineering	1999	Q2
Electrical and Electronic Engineering	2000	Q3
Electrical and Electronic Engineering	2001	Q3
Electrical and Electronic Engineering	2002	Q4
Electrical and Electronic Engineering	2003	Q4
Electrical and Electronic Engineering	2004	Q3
Electrical and Electronic Engineering	2005	Q4
Electrical and Electronic Engineering	2006	Q4
Electrical and Electronic Engineering	2007	Q3
Electrical and Electronic Engineering	2008	Q3
Electrical and Electronic Engineering	2009	Q3
Electrical and Electronic Engineering	2010	Q3
Electrical and Electronic Engineering	2011	Q3
Electrical and Electronic Engineering	2012	Q3
Electrical and Electronic Engineering	2013	Q4
Electrical and Electronic Engineering	2014	Q3
Electrical and Electronic Engineering	2015	Q3
Electrical and Electronic Engineering	2016	Q3
Electrical and Electronic Engineering	2017	Q4
Electrical and Electronic Engineering	2018	Q4
Electrical and Electronic Engineering	2019	Q4
Energy Engineering and Power Technology	1999	Q1
Energy Engineering and Power Technology	2000	Q2
Energy Engineering and Power Technology	2001	Q3
Energy Engineering and Power Technology	2002	Q3
Energy Engineering and Power Technology	2003	Q4
Energy Engineering and Power Technology	2004	Q3
Energy Engineering and Power Technology	2005	Q3
Energy Engineering and Power Technology	2006	Q3
Energy Engineering and Power Technology	2007	Q3
Energy Engineering and Power Technology	2008	Q2
Energy Engineering and Power Technology	2009	Q3
Energy Engineering and Power Technology	2010	Q3
Energy Engineering and Power Technology	2011	Q3
Energy Engineering and Power Technology	2012	Q3
Energy Engineering and Power Technology	2013	Q3
Energy Engineering and Power Technology	2014	Q3
Energy Engineering and Power Technology	2015	Q3
Energy Engineering and Power Technology	2016	Q3
Energy Engineering and Power Technology	2017	Q4
Energy Engineering and Power Technology	2018	Q4
Energy Engineering and Power Technology	2019	Q4
Hardware and Architecture	1999	Q1
Hardware and Architecture	2000	Q3
Hardware and Architecture	2001	Q3
Hardware and Architecture	2002	Q4
Hardware and Architecture	2003	Q4
Hardware and Architecture	2004	Q4
Hardware and Architecture	2005	Q4
Hardware and Architecture	2006	Q4
Hardware and Architecture	2007	Q4
Hardware and Architecture	2008	Q3
Hardware and Architecture	2009	Q4
Hardware and Architecture	2010	Q4
Hardware and Architecture	2011	Q4
Hardware and Architecture	2012	Q3
Hardware and Architecture	2013	Q4
Hardware and Architecture	2014	Q4
Hardware and Architecture	2015	Q3
Hardware and Architecture	2016	Q4
Hardware and Architecture	2017	Q4
Hardware and Architecture	2018	Q4
Hardware and Architecture	2019	Q4
Process Chemistry and Technology	1999	Q2
Process Chemistry and Technology	2000	Q2
Process Chemistry and Technology	2001	Q2
Process Chemistry and Technology	2002	Q3
Process Chemistry and Technology	2003	Q3
Process Chemistry and Technology	2004	Q2
Process Chemistry and Technology	2005	Q3
Process Chemistry and Technology	2006	Q3
Process Chemistry and Technology	2007	Q3
Process Chemistry and Technology	2008	Q3
Process Chemistry and Technology	2009	Q3
Process Chemistry and Technology	2010	Q3
Process Chemistry and Technology	2011	Q3
Process Chemistry and Technology	2012	Q3
Process Chemistry and Technology	2013	Q3
Process Chemistry and Technology	2014	Q3
Process Chemistry and Technology	2015	Q4
Process Chemistry and Technology	2016	Q3
Process Chemistry and Technology	2017	Q4
Process Chemistry and Technology	2018	Q4
Process Chemistry and Technology	2019	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	0.422
2000	0.188
2001	0.144
2002	0.101
2003	0.101
2004	0.141
2005	0.108
2006	0.114
2007	0.128
2008	0.213
2009	0.192
2010	0.146
2011	0.152
2012	0.211
2013	0.159
2014	0.197
2015	0.200
2016	0.195
2017	0.116
2018	0.107
2019	0.105

Total Documents

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

Year	Documents
1999	66
2000	41
2001	121
2002	122
2003	35
2004	41
2005	32
2006	33
2007	26
2008	55
2009	60
2010	31
2011	54
2012	58
2013	73
2014	96
2015	90
2016	131
2017	0
2018	0
2019	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	0.201
Cites / Doc. (4 years)	2000	0.040
Cites / Doc. (4 years)	2001	0.051
Cites / Doc. (4 years)	2002	0.038
Cites / Doc. (4 years)	2003	0.043
Cites / Doc. (4 years)	2004	0.044
Cites / Doc. (4 years)	2005	0.025
Cites / Doc. (4 years)	2006	0.030
Cites / Doc. (4 years)	2007	0.121
Cites / Doc. (4 years)	2008	0.189
Cites / Doc. (4 years)	2009	0.130
Cites / Doc. (4 years)	2010	0.195
Cites / Doc. (4 years)	2011	0.215
Cites / Doc. (4 years)	2012	0.220
Cites / Doc. (4 years)	2013	0.281
Cites / Doc. (4 years)	2014	0.255
Cites / Doc. (4 years)	2015	0.199
Cites / Doc. (4 years)	2016	0.322
Cites / Doc. (4 years)	2017	0.149
Cites / Doc. (4 years)	2018	0.151
Cites / Doc. (4 years)	2019	0.149
Cites / Doc. (3 years)	1999	0.201
Cites / Doc. (3 years)	2000	0.045
Cites / Doc. (3 years)	2001	0.041
Cites / Doc. (3 years)	2002	0.048
Cites / Doc. (3 years)	2003	0.035
Cites / Doc. (3 years)	2004	0.032
Cites / Doc. (3 years)	2005	0.030
Cites / Doc. (3 years)	2006	0.065
Cites / Doc. (3 years)	2007	0.113
Cites / Doc. (3 years)	2008	0.187
Cites / Doc. (3 years)	2009	0.123
Cites / Doc. (3 years)	2010	0.206
Cites / Doc. (3 years)	2011	0.233
Cites / Doc. (3 years)	2012	0.255
Cites / Doc. (3 years)	2013	0.273
Cites / Doc. (3 years)	2014	0.227
Cites / Doc. (3 years)	2015	0.225
Cites / Doc. (3 years)	2016	0.336
Cites / Doc. (3 years)	2017	0.142
Cites / Doc. (3 years)	2018	0.145
Cites / Doc. (3 years)	2019	0.168
Cites / Doc. (2 years)	1999	0.255
Cites / Doc. (2 years)	2000	0.047
Cites / Doc. (2 years)	2001	0.047
Cites / Doc. (2 years)	2002	0.056
Cites / Doc. (2 years)	2003	0.025
Cites / Doc. (2 years)	2004	0.025
Cites / Doc. (2 years)	2005	0.066
Cites / Doc. (2 years)	2006	0.068
Cites / Doc. (2 years)	2007	0.108
Cites / Doc. (2 years)	2008	0.186
Cites / Doc. (2 years)	2009	0.136
Cites / Doc. (2 years)	2010	0.235
Cites / Doc. (2 years)	2011	0.286
Cites / Doc. (2 years)	2012	0.341
Cites / Doc. (2 years)	2013	0.214
Cites / Doc. (2 years)	2014	0.153
Cites / Doc. (2 years)	2015	0.231
Cites / Doc. (2 years)	2016	0.349
Cites / Doc. (2 years)	2017	0.113
Cites / Doc. (2 years)	2018	0.107
Cites / Doc. (2 years)	2019	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	18
Self Cites	2000	6
Self Cites	2001	3
Self Cites	2002	3
Self Cites	2003	0
Self Cites	2004	3
Self Cites	2005	0
Self Cites	2006	1
Self Cites	2007	1
Self Cites	2008	6
Self Cites	2009	8
Self Cites	2010	21
Self Cites	2011	18
Self Cites	2012	12
Self Cites	2013	8
Self Cites	2014	14
Self Cites	2015	18
Self Cites	2016	55
Self Cites	2017	0
Self Cites	2018	0
Self Cites	2019	0
Total Cites	1999	32
Total Cites	2000	8
Total Cites	2001	7
Total Cites	2002	11
Total Cites	2003	10
Total Cites	2004	9
Total Cites	2005	6
Total Cites	2006	7
Total Cites	2007	12
Total Cites	2008	17
Total Cites	2009	14
Total Cites	2010	29
Total Cites	2011	34
Total Cites	2012	37
Total Cites	2013	39
Total Cites	2014	42
Total Cites	2015	51
Total Cites	2016	87
Total Cites	2017	45
Total Cites	2018	32
Total Cites	2019	22

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	0.088
External Cites per document	2000	0.011
External Cites per document	2001	0.024
External Cites per document	2002	0.035
External Cites per document	2003	0.035
External Cites per document	2004	0.022
External Cites per document	2005	0.030
External Cites per document	2006	0.056
External Cites per document	2007	0.104
External Cites per document	2008	0.121
External Cites per document	2009	0.053
External Cites per document	2010	0.057
External Cites per document	2011	0.110
External Cites per document	2012	0.172
External Cites per document	2013	0.217
External Cites per document	2014	0.151
External Cites per document	2015	0.145
External Cites per document	2016	0.124
External Cites per document	2017	0.142
External Cites per document	2018	0.145
External Cites per document	2019	0.168
Cites per document	1999	0.201
Cites per document	2000	0.045
Cites per document	2001	0.041
Cites per document	2002	0.048
Cites per document	2003	0.035
Cites per document	2004	0.032
Cites per document	2005	0.030
Cites per document	2006	0.065
Cites per document	2007	0.113
Cites per document	2008	0.187
Cites per document	2009	0.123
Cites per document	2010	0.206
Cites per document	2011	0.233
Cites per document	2012	0.255
Cites per document	2013	0.273
Cites per document	2014	0.227
Cites per document	2015	0.225
Cites per document	2016	0.336
Cites per document	2017	0.142
Cites per document	2018	0.145
Cites per document	2019	0.168

% 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	21.21
2000	0.00
2001	0.00
2002	0.00
2003	28.57
2004	7.32
2005	25.00
2006	48.48
2007	30.77
2008	5.45
2009	15.00
2010	29.03
2011	1.85
2012	6.90
2013	4.11
2014	2.08
2015	6.67
2016	1.53
2017	0
2018	0
2019	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	0
Non-citable documents	2000	0
Non-citable documents	2001	0
Non-citable documents	2002	0
Non-citable documents	2003	103
Non-citable documents	2004	107
Non-citable documents	2005	109
Non-citable documents	2006	10
Non-citable documents	2007	10
Non-citable documents	2008	11
Non-citable documents	2009	13
Non-citable documents	2010	10
Non-citable documents	2011	7
Non-citable documents	2012	1
Non-citable documents	2013	0
Non-citable documents	2014	0
Non-citable documents	2015	3
Non-citable documents	2016	3
Non-citable documents	2017	3
Non-citable documents	2018	0
Non-citable documents	2019	0
Citable documents	1999	159
Citable documents	2000	176
Citable documents	2001	169
Citable documents	2002	228
Citable documents	2003	181
Citable documents	2004	171
Citable documents	2005	89
Citable documents	2006	98
Citable documents	2007	96
Citable documents	2008	80
Citable documents	2009	101
Citable documents	2010	131
Citable documents	2011	139
Citable documents	2012	144
Citable documents	2013	143
Citable documents	2014	185
Citable documents	2015	224
Citable documents	2016	256
Citable documents	2017	314
Citable documents	2018	221
Citable documents	2019	131

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	136
Uncited documents	2000	168
Uncited documents	2001	162
Uncited documents	2002	218
Uncited documents	2003	276
Uncited documents	2004	270
Uncited documents	2005	192
Uncited documents	2006	101
Uncited documents	2007	96
Uncited documents	2008	75
Uncited documents	2009	104
Uncited documents	2010	119
Uncited documents	2011	116
Uncited documents	2012	115
Uncited documents	2013	118
Uncited documents	2014	157
Uncited documents	2015	190
Uncited documents	2016	203
Uncited documents	2017	286
Uncited documents	2018	197
Uncited documents	2019	115
Cited documents	1999	23
Cited documents	2000	8
Cited documents	2001	7
Cited documents	2002	10
Cited documents	2003	8
Cited documents	2004	8
Cited documents	2005	6
Cited documents	2006	7
Cited documents	2007	10
Cited documents	2008	16
Cited documents	2009	10
Cited documents	2010	22
Cited documents	2011	30
Cited documents	2012	30
Cited documents	2013	25
Cited documents	2014	28
Cited documents	2015	37
Cited documents	2016	56
Cited documents	2017	31
Cited documents	2018	24
Cited documents	2019	16