Scimago Journal & Country Rank

Johns Hopkins APL Technical Digest (Applied Physics Laboratory)

Country United States  - SIR icon
H Index
Subject Area and CategoryEngineering
Engineering (miscellaneous)

Physics and Astronomy
Physics and Astronomy (miscellaneous)
Publisher Johns Hopkins University Press
Publication typeJournals
Coverage1981-1994, 1996-2019
Scope The Johns Hopkins APL Technical Digest (ISSN 0270-5214) is an unclassified technical journal published quarterly under the auspices of the Johns Hopkins University Applied Physics Laboratory (APL). Published in print and online, the Digest seeks to communicate the work performed at APL to its sponsors and to the scientific and engineering communities, defense establishment, academia, and industry. The electronic version may include multimedia capabilities for enhanced visualization of some concepts. The following abstracting services currently cover the Johns Hopkins APL Technical Digest: Chemical Abstracts; Current Contents; Engineering Village; and the following CSA abstracts: Aerospace and High Technology Database; Aquatic Sciences and Fisheries Abstracts; Computer and Information Systems Abstracts; Electronics and Communications Abstracts; Mechanical and Transportation Engineering Abstracts; Meteorological and Geoastrophysical Abstracts; and Oceanic Abstracts.



Join the conversation about this journal

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.

Engineering (miscellaneous)1999Q2
Engineering (miscellaneous)2000Q2
Engineering (miscellaneous)2001Q1
Engineering (miscellaneous)2002Q2
Engineering (miscellaneous)2003Q2
Engineering (miscellaneous)2004Q3
Engineering (miscellaneous)2005Q2
Engineering (miscellaneous)2006Q3
Engineering (miscellaneous)2007Q3
Engineering (miscellaneous)2008Q3
Engineering (miscellaneous)2009Q3
Engineering (miscellaneous)2010Q4
Engineering (miscellaneous)2011Q3
Engineering (miscellaneous)2012Q4
Engineering (miscellaneous)2013Q2
Engineering (miscellaneous)2014Q3
Engineering (miscellaneous)2015Q3
Engineering (miscellaneous)2016Q4
Engineering (miscellaneous)2017Q4
Engineering (miscellaneous)2018Q2
Engineering (miscellaneous)2019Q3
Physics and Astronomy (miscellaneous)1999Q3
Physics and Astronomy (miscellaneous)2000Q3
Physics and Astronomy (miscellaneous)2001Q3
Physics and Astronomy (miscellaneous)2002Q3
Physics and Astronomy (miscellaneous)2003Q3
Physics and Astronomy (miscellaneous)2004Q4
Physics and Astronomy (miscellaneous)2005Q4
Physics and Astronomy (miscellaneous)2006Q4
Physics and Astronomy (miscellaneous)2007Q4
Physics and Astronomy (miscellaneous)2008Q4
Physics and Astronomy (miscellaneous)2009Q4
Physics and Astronomy (miscellaneous)2010Q4
Physics and Astronomy (miscellaneous)2011Q4
Physics and Astronomy (miscellaneous)2012Q4
Physics and Astronomy (miscellaneous)2013Q3
Physics and Astronomy (miscellaneous)2014Q4
Physics and Astronomy (miscellaneous)2015Q4
Physics and Astronomy (miscellaneous)2016Q4
Physics and Astronomy (miscellaneous)2017Q4
Physics and Astronomy (miscellaneous)2018Q4
Physics and Astronomy (miscellaneous)2019Q4

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.

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 documentYearValue
Cites / Doc. (4 years)19990.231
Cites / Doc. (4 years)20000.359
Cites / Doc. (4 years)20010.422
Cites / Doc. (4 years)20020.329
Cites / Doc. (4 years)20030.230
Cites / Doc. (4 years)20040.480
Cites / Doc. (4 years)20050.273
Cites / Doc. (4 years)20060.255
Cites / Doc. (4 years)20070.313
Cites / Doc. (4 years)20080.514
Cites / Doc. (4 years)20090.298
Cites / Doc. (4 years)20100.327
Cites / Doc. (4 years)20110.184
Cites / Doc. (4 years)20120.268
Cites / Doc. (4 years)20130.466
Cites / Doc. (4 years)20140.520
Cites / Doc. (4 years)20150.633
Cites / Doc. (4 years)20160.561
Cites / Doc. (4 years)20170.613
Cites / Doc. (4 years)20180.429
Cites / Doc. (4 years)20190.317
Cites / Doc. (3 years)19990.231
Cites / Doc. (3 years)20000.395
Cites / Doc. (3 years)20010.452
Cites / Doc. (3 years)20020.337
Cites / Doc. (3 years)20030.236
Cites / Doc. (3 years)20040.132
Cites / Doc. (3 years)20050.368
Cites / Doc. (3 years)20060.254
Cites / Doc. (3 years)20070.366
Cites / Doc. (3 years)20080.315
Cites / Doc. (3 years)20090.372
Cites / Doc. (3 years)20100.237
Cites / Doc. (3 years)20110.160
Cites / Doc. (3 years)20120.190
Cites / Doc. (3 years)20130.482
Cites / Doc. (3 years)20140.612
Cites / Doc. (3 years)20150.512
Cites / Doc. (3 years)20160.562
Cites / Doc. (3 years)20170.395
Cites / Doc. (3 years)20180.513
Cites / Doc. (3 years)20190.204
Cites / Doc. (2 years)19990.195
Cites / Doc. (2 years)20000.481
Cites / Doc. (2 years)20010.468
Cites / Doc. (2 years)20020.369
Cites / Doc. (2 years)20030.129
Cites / Doc. (2 years)20040.171
Cites / Doc. (2 years)20050.456
Cites / Doc. (2 years)20060.230
Cites / Doc. (2 years)20070.246
Cites / Doc. (2 years)20080.364
Cites / Doc. (2 years)20090.172
Cites / Doc. (2 years)20100.133
Cites / Doc. (2 years)20110.106
Cites / Doc. (2 years)20120.188
Cites / Doc. (2 years)20130.590
Cites / Doc. (2 years)20140.388
Cites / Doc. (2 years)20150.542
Cites / Doc. (2 years)20160.290
Cites / Doc. (2 years)20170.476
Cites / Doc. (2 years)20180.120
Cites / Doc. (2 years)20190.238
Total 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.

Self Cites199915
Self Cites200021
Self Cites200118
Self Cites20027
Self Cites20039
Self Cites20047
Self Cites200523
Self Cites20063
Self Cites20070
Self Cites20082
Self Cites20090
Self Cites20101
Self Cites20113
Self Cites20120
Self Cites201315
Self Cites20140
Self Cites20152
Self Cites20160
Self Cites20170
Self Cites20183
Self Cites20190
Total Cites199928
Total Cites200058
Total Cites200176
Total Cites200264
Total Cites200337
Total Cites200418
Total Cites200539
Total Cites200633
Total Cites200737
Total Cites200823
Total Cites200916
Total Cites20109
Total Cites201117
Total Cites201223
Total Cites201366
Total Cites201463
Total Cites201543
Total Cites201641
Total Cites201715
Total Cites201820
Total Cites201910
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.

External Cites per document19990.107
External Cites per document20000.252
External Cites per document20010.345
External Cites per document20020.300
External Cites per document20030.178
External Cites per document20040.081
External Cites per document20050.151
External Cites per document20060.231
External Cites per document20070.366
External Cites per document20080.288
External Cites per document20090.372
External Cites per document20100.211
External Cites per document20110.132
External Cites per document20120.190
External Cites per document20130.372
External Cites per document20140.612
External Cites per document20150.488
External Cites per document20160.562
External Cites per document20170.395
External Cites per document20180.436
External Cites per document20190.204
Cites per document19990.231
Cites per document20000.395
Cites per document20010.452
Cites per document20020.337
Cites per document20030.236
Cites per document20040.132
Cites per document20050.368
Cites per document20060.254
Cites per document20070.366
Cites per document20080.315
Cites per document20090.372
Cites per document20100.237
Cites per document20110.160
Cites per document20120.190
Cites per document20130.482
Cites per document20140.612
Cites per document20150.512
Cites per document20160.562
Cites per document20170.395
Cites per document20180.513
Cites per document20190.204
% 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.

YearInternational Collaboration
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.

Non-citable documents19990
Non-citable documents20000
Non-citable documents20010
Non-citable documents20027
Non-citable documents200310
Non-citable documents200412
Non-citable documents20056
Non-citable documents20064
Non-citable documents20072
Non-citable documents20081
Non-citable documents20090
Non-citable documents20100
Non-citable documents20111
Non-citable documents20121
Non-citable documents20131
Non-citable documents20141
Non-citable documents20151
Non-citable documents20161
Non-citable documents20170
Non-citable documents20180
Non-citable documents20190
Citable documents1999121
Citable documents2000147
Citable documents2001168
Citable documents2002190
Citable documents2003157
Citable documents2004136
Citable documents2005106
Citable documents2006130
Citable documents2007101
Citable documents200873
Citable documents200943
Citable documents201038
Citable documents2011106
Citable documents2012121
Citable documents2013137
Citable documents2014103
Citable documents201584
Citable documents201673
Citable documents201738
Citable documents201839
Citable documents201949
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.

Uncited documents1999101
Uncited documents2000109
Uncited documents2001125
Uncited documents2002161
Uncited documents2003142
Uncited documents2004134
Uncited documents200583
Uncited documents2006113
Uncited documents200779
Uncited documents200858
Uncited documents200935
Uncited documents201031
Uncited documents201193
Uncited documents2012107
Uncited documents2013101
Uncited documents201476
Uncited documents201563
Uncited documents201652
Uncited documents201727
Uncited documents201830
Uncited documents201946
Cited documents199920
Cited documents200038
Cited documents200143
Cited documents200236
Cited documents200325
Cited documents200414
Cited documents200529
Cited documents200621
Cited documents200724
Cited documents200816
Cited documents20098
Cited documents20107
Cited documents201114
Cited documents201215
Cited documents201337
Cited documents201428
Cited documents201522
Cited documents201622
Cited documents201711
Cited documents20189
Cited documents20193
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