21st Century Systems (United States)
Open Access statistics for 21st Century Systems (United States), United States, covering academic research published from 2001 to 2025.
Open Access statistics for 21st Century Systems (United States), United States, covering academic research published from 2001 to 2025. Read More.
Open Access Percentage
31%
Total
Publications
204
Total Open
Publications
64
Total
Citations
3.3K
Open Access
Percentage
31%
Total
Publications
204
Total Open
Publications
64
Total
Citations
3.3K
Breakdown
Publisher Open
19%
Both
9%
Other Platform Open
2%
Closed
70%
Percentage of Open Access over time
Publisher Open
Both
Other Platform Open
Closed
Volume of Open Access over time
Open
Closed
Publisher Open
OA Journal 27%
15
Hybrid 18%
10
No Guarantees 55%
31
Other Platform Open
Institution 61%
14
Domain 35%
8
Other Internet 35%
8
Preprint 4%
1
Public 0%
0
Other Platform Locations
Name | Platform Type | Publications |
|---|---|---|
PubMed Central | Domain | 8 |
doaj.org OAI-PMH Repository | Institution | 8 |
Unknown Repository | Other Internet | 5 |
DOI | Other Internet | 4 |
Hospitais da Universidade de Coimbra | Institution | 2 |
World Bank | Institution | 1 |
uri.edu OAI-PMH Repository | Institution | 1 |
University of Oslo | Institution | 1 |
University of Genoa | Institution | 1 |
University of Cambridge | Institution | 1 |