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Creation Date 

1. Before 1959  (407)
2. 1959 To 1974  (13,992)
3. 1975 To 1990  (60,244)
4. 1991 To 2007  (448,098)
5. After 2007  (2,684,171)
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New Records 

1. New From Last Month  (43,590)
2. New From Last 3 Month  (77,833)
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Resource Type 

1. Articles  (2,415,032)
2. Patents  (430,997)
3. Book Chapters  (91,784)
4. magazinearticle  (74,160)
5. Thesises (postgraduate)  (71,153)
6. Conference Proceedings  (50,598)
7. Reports  (32,677)
8. Books  (19,317)
9. Web Resources  (8,934)
10. Reviews  (8,923)
11. Newsletter Articles  (5,631)
12. References  (3,207)
13. Newspaper Articles  (1,856)
14. Text Resources  (1,587)
15. Other  (1,073)
16. Standards  (837)
17. Datasets  (833)
18. Images  (680)
19. Videos  (375)
20. Government Documents  (161)
21. Journals  (62)
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Subject 

1. Science & Technology  (1,616,524)
2. Technology  (767,697)
3. Life Sciences & Biomedicine  (590,616)
4. Physical Sciences  (590,309)
5. Physics  (434,366)
6. Engineering  (429,870)
7. Optimization  (422,599)
8. Algorithms  (305,220)
9. Chemistry  (278,180)
10. Computer Science  (226,871)
11. Humans  (210,958)
12. Science & Technology - Other Topics  (179,116)
13. Counting  (171,179)
14. Computing  (170,629)
15. Calculating  (170,489)
16. Materials Science  (163,212)
17. Mathematical Models  (150,972)
18. Mathematics  (147,827)
19. Engineering, Electrical & Electronic  (135,337)
20. Exact Sciences And Technology  (131,486)
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Author/Creator 

1. Henrot, Antoine  (96)
2. Durea, Marius  (35)
3. Strugariu, Radu  (29)
4. Leuschner, Kristin  (22)
5. Masi, Ralph  (21)
6. Taunton, Jack  (12)
7. CRS  (1)
8. Durea, Marius  (1)
9. Walker, Brittian A  (1)
10. Rodrâiguez-Aguilar,Juan Antonio  (1)
11. jshimeld  (1)
12. Dominique Bonvin  (1)
13. Gregorio Romero Rey; Luisa Martinez Muneta  (1)
14. United States  (1)
15. Arroyo Center  (1)
16. Terrence K. Kelly  (1)
17. Josep M. Guerrero (Ed.); Amjad Anvari-Moghaddam (Ed.)  (1)
18. Taunton, Jack  (1)
19. Monette, Johanne  (1)
20. Masi, Ralph  (1)
21. Knapp, Steven A  (1)
22. Hossein Peyvandi  (1)
23. Leuschner, Kristin  (1)
24. Rand Corporation  (1)
25. Cerquides,Jesâus  (1)
26. Brian G. Chow  (1)
27. Monette, Johanne  (1)
28. Eric  (1)
29. Vinyals Salgado, Meritxell  (1)
30. Henrot, Antoine  (1)
31. Felix T.S. Chan; Manoj Kumar Tiwari  (1)
32. Strugariu, Radu  (1)
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Databases 

1. ProQuest Central  (1,766,582)
2. DOAJ Directory of Open Access Journals  (1,054,787)
3. ROAD: Directory of Open Access Scholarly Resources  (945,878)
4. GFMER Free Medical Journals  (510,694)
5. PubMed Central  (449,710)
6. MEDLINE  (375,632)
7. esp@cenet  (359,432)
8. Freely Accessible Journals  (150,200)
9. arXiv.org  (137,878)
10. Springer Nature OA Free Journals  (121,348)
11. Institute of Physics Open Access Journal Titles  (91,647)
12. Hyper Article en Ligne (HAL) (Open Access)  (79,760)
13. Wiley Online Library Open Access  (74,840)
14. IOPscience (Open Access)  (72,264)
15. Nature Open Access  (60,524)
16. Coronavirus Research Database  (50,191)
17. Ebook Central - Academic Complete  (45,266)
18. ProQuest One Psychology  (43,242)
19. USPTO Issued Patents  (41,041)
20. Public Library of Science (PLoS)  (39,528)
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Language 

1. English  (3,083,242)
2. Chinese  (238,758)
3. Japanese  (176,188)
4. French  (73,643)
5. German  (36,949)
6. Portuguese  (14,838)
7. Spanish  (13,837)
8. Russian  (10,524)
9. Korean  (9,035)
10. Croatian  (3,528)
11. Czech  (2,798)
12. Polish  (1,749)
13. Persian  (1,733)
14. Norwegian  (1,715)
15. Ukrainian  (1,203)
16. Swedish  (1,171)
17. Turkish  (1,091)
18. Italian  (1,016)
19. Indonesian  (853)
20. Slovak  (799)
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Journal Title 

1. Applied Sciences  (27,309)
2. Arxiv  (62,328)
3. arXiv.org  (129,132)
4. Energies  (28,907)
5. Journal Of Physics: Conference Series  (34,379)
6. Journal Of Physics. Conference Series  (36,965)
7. Plos One  (31,837)
8. Scientific Reports  (34,443)
9. Sensors  (26,180)
10. Sustainability  (24,301)
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