| 1 | Renewable Energy Sources | 56 | 5.5K | 371 | 288 |
| 2 | Chemical Engineering | 63 | 2.6K | 1086 | 1031 |
| 2 | Oncology | 4 | 2.6K | 1491 | 548 |
| 4 | Environment | 26 | 2.2K | 1554 | 1314 |
| 5 | Ecology | 36 | 1.7K | 1819 | 1721 |
| 6 | Medicine | 77 | 1.6K | 1799 | 2138 |
| 7 | Energy Policy | 27 | 1.6K | 803 | 666 |
| 8 | Biomass Energy | 20 | 1.5K | 864 | 624 |
| 9 | Radio | 42 | 1.5K | 317 | 337 |
| 10 | Pollution | 36 | 1.4K | 1604 | 1647 |
| 11 | Telecommunication | 26 | 1.4K | 831 | 536 |
| 12 | computer networks | 21 | 1.4K | 871 | 436 |
| 13 | Environmental Health | 36 | 1.4K | 1471 | 1394 |
| 14 | Composite Materials | 17 | 1.3K | 1141 | 786 |
| 15 | Engineering | 44 | 1.3K | 997 | 756 |
| 16 | Biochemistry | 42 | 1.2K | 2468 | 2445 |
| 16 | Chemistry | 56 | 1.2K | 2498 | 2791 |
| 18 | Science | 64 | 1.2K | 1987 | 2796 |
| 19 | Biotechnology | 25 | 1.2K | 1979 | 1720 |
| 20 | Radio waves | 38 | 1.2K | 199 | 210 |
| 21 | Research | 83 | 1.2K | 1548 | 2103 |
| 22 | Information Science | 6 | 1.2K | 1832 | 568 |
| 23 | Molecular Biology | 28 | 1.1K | 2506 | 2298 |
| 24 | Behavior | 11 | 1.1K | 1533 | 1004 |
| 25 | Health Information Management | 3 | 1.1K | 316 | 106 |
| 26 | human behavior | 9 | 1.1K | 1314 | 822 |
| 27 | Biochemical Engineering | 16 | 1.1K | 1446 | 1321 |
| 28 | energy conservation | 20 | 1.0K | 635 | 665 |
| 29 | Environmental Engineering | 35 | 1.0K | 938 | 1068 |
| 29 | Polymers | 38 | 1.0K | 1400 | 1324 |
| 31 | Water | 13 | 978 | 1138 | 886 |
| 32 | Biomedical Engineering | 25 | 969 | 1702 | 1474 |
| 33 | environmental protection | 28 | 968 | 1039 | 1041 |
| 34 | Environmental Management | 20 | 967 | 1056 | 1028 |
| 35 | Building Materials | 15 | 945 | 797 | 659 |
| 36 | polymerization | 29 | 915 | 1361 | 1166 |
| 37 | China | 31 | 897 | 701 | 560 |
| 38 | Solar Energy | 22 | 881 | 472 | 478 |
| 39 | environmental pollution | 25 | 878 | 1526 | 1631 |
| 40 | management | 26 | 856 | 1174 | 1234 |
| 41 | Environmental Policy | 16 | 855 | 1308 | 1158 |
| 42 | Food | 27 | 854 | 943 | 1016 |
| 43 | energy resources | 4 | 833 | 1129 | 559 |
| 44 | Spectrum analysis | 6 | 804 | 2793 | 1416 |
| 45 | Economics | 32 | 772 | 1343 | 1180 |
| 46 | Technology | 26 | 759 | 1236 | 1061 |
| 47 | Psychology | 40 | 747 | 1242 | 1390 |
| 47 | Materials | 46 | 747 | 1718 | 2069 |
| 49 | Engineering Geology | 8 | 694 | 830 | 436 |
| 50 | Education | 21 | 685 | 1322 | 911 |
| 51 | Molecular Spectroscopy | 3 | 675 | 1781 | 431 |
| 52 | Business | 13 | 674 | 1024 | 953 |
| 53 | Asia | 44 | 646 | 405 | 503 |
| 54 | Technology Assessment | 2 | 644 | 551 | 51 |
| 55 | Surface Chemistry | 14 | 623 | 1860 | 1564 |
| 55 | Colloids | 14 | 623 | 1830 | 1602 |
| 57 | Catalysis | 14 | 609 | 1791 | 1642 |
| 58 | Tourism | 5 | 605 | 1305 | 678 |
| 59 | Physics | 37 | 598 | 2816 | 3608 |
| 60 | Environmental monitoring | 18 | 582 | 1573 | 1707 |
| 61 | Civil Engineering | 25 | 544 | 392 | 225 |
| 62 | Nutrition | 16 | 539 | 1667 | 1624 |
| 63 | Social Change | 3 | 525 | 1039 | 491 |
| 64 | food technology | 21 | 509 | 891 | 1063 |
| 65 | Biology | 24 | 490 | 2945 | 3712 |
| 66 | Wireless Communication Systems | 24 | 470 | 825 | 880 |
| 67 | Business Ethics | 2 | 456 | 1187 | 640 |
| 68 | Bioengineering | 9 | 436 | 2292 | 2043 |
| 69 | Materials Science | 13 | 424 | 2151 | 1992 |
| 70 | Water pollution | 14 | 416 | 1260 | 1408 |
| 71 | Social Sciences | 30 | 408 | 950 | 1085 |
| 72 | hazard mitigation | 7 | 397 | 479 | 294 |
| 72 | natural disasters | 8 | 397 | 690 | 494 |
| 74 | coal | 5 | 392 | 1226 | 881 |
| 75 | Diet | 7 | 380 | 1127 | 1048 |
| 76 | Economic History | 24 | 379 | 1111 | 1137 |
| 77 | Quality Control | 23 | 378 | 384 | 652 |
| 78 | Artificial Intelligence | 18 | 377 | 1582 | 1777 |
| 79 | Electrochemistry | 12 | 369 | 2033 | 1685 |
| 80 | Optics | 25 | 366 | 1607 | 1606 |
| 81 | Electronics | 15 | 344 | 1544 | 1400 |
| 82 | Liquid Crystals | 13 | 336 | 396 | 176 |
| 83 | Environmental Chemistry | 12 | 334 | 912 | 1228 |
| 84 | Nuclear Physics | 8 | 332 | 2521 | 1955 |
| 84 | enzymes | 2 | 332 | 1593 | 722 |
| 86 | Sociology | 18 | 322 | 1135 | 1267 |
| 87 | Information Technology | 12 | 316 | 1145 | 1130 |
| 88 | Systems Engineering | 9 | 310 | 1259 | 1005 |
| 89 | Neurology | 6 | 309 | 2662 | 2217 |
| 90 | Microbiology | 20 | 308 | 2281 | 2998 |
| 91 | Cytology | 14 | 304 | 1691 | 2080 |
| 92 | Production Planning | 6 | 303 | 141 | 129 |
| 92 | Production Control | 6 | 303 | 139 | 129 |
| 94 | Astrophysics | 8 | 300 | 1915 | 1611 |
| 95 | Quality of life | 5 | 299 | 1036 | 738 |
| 96 | marketing | 8 | 292 | 1235 | 1129 |
| 97 | Chemical industry | 9 | 290 | 698 | 442 |
| 98 | Heat Exchangers | 8 | 288 | 771 | 785 |
| 99 | Electromagnetism | 8 | 285 | 595 | 431 |
| 99 | Boundary Value Problems | 8 | 285 | 422 | 287 |
| 99 | Antenna Arrays | 8 | 285 | 293 | 259 |
| 102 | Photochemistry | 6 | 282 | 1186 | 857 |
| 102 | Photobiology | 6 | 282 | 941 | 662 |
| 104 | Hydrology | 8 | 280 | 1409 | 1184 |
| 105 | Pediatrics | 3 | 278 | 1754 | 1148 |
| 106 | Medical Laboratory Science | 2 | 273 | 1990 | 1213 |
| 107 | actuators | 5 | 269 | 1662 | 1353 |
| 107 | transducers | 5 | 269 | 1662 | 1353 |
| 109 | Image Processing | 11 | 266 | 1180 | 1255 |
| 110 | Semiconductors | 8 | 249 | 1345 | 938 |
| 110 | Plastics | 8 | 249 | 1000 | 781 |
| 112 | biological factors | 6 | 244 | 1329 | 1004 |
| 113 | Humanities | 21 | 242 | 411 | 484 |
| 114 | Biophysics | 12 | 240 | 2491 | 2811 |
| 115 | Rock Mechanics | 2 | 233 | 969 | 527 |
| 116 | Organometallic chemistry | 7 | 230 | 1448 | 1031 |
| 117 | finance | 19 | 227 | 893 | 1225 |
| 117 | India | 4 | 227 | 1245 | 254 |
| 119 | Vaccines | 3 | 224 | 1394 | 848 |
| 120 | Engineering Mathematics | 4 | 220 | 1663 | 828 |
| 121 | Structural design | 8 | 219 | 463 | 435 |
| 121 | Smart Materials | 8 | 219 | 521 | 476 |
| 123 | Ultrasonics | 7 | 213 | 735 | 858 |
| 124 | Sonochemistry | 6 | 210 | 384 | 568 |
| 125 | Creativity | 3 | 205 | 283 | 144 |
| 126 | dietary supplements | 2 | 201 | 1068 | 520 |
| 126 | econometric models | 2 | 201 | 830 | 352 |
| 128 | Measurement | 5 | 199 | 1045 | 740 |
| 128 | Happiness | 3 | 199 | 434 | 255 |
| 128 | water reuse | 8 | 199 | 97 | 173 |
| 131 | Methodology | 4 | 198 | 426 | 140 |
| 132 | Sustainable Development | 12 | 197 | 863 | 1381 |
| 133 | Data Mining | 3 | 196 | 1583 | 1014 |
| 134 | Medicinal plants | 4 | 193 | 1132 | 1046 |
| 135 | Nanochemistry | 3 | 192 | 1257 | 666 |
| 135 | Access to Information | 2 | 192 | 272 | 137 |
| 135 | big data | 2 | 192 | 843 | 294 |
| 135 | Information dissemination | 2 | 192 | 272 | 137 |
| 139 | Solid State Chemistry | 4 | 191 | 2123 | 1506 |
| 140 | construction industry | 10 | 190 | 41 | 41 |
| 141 | Hydrocarbons | 2 | 188 | 140 | 34 |
| 142 | Electrical Engineering | 12 | 186 | 1640 | 1458 |
| 143 | biomedicine | 4 | 181 | 380 | 332 |
| 144 | Detergents | 4 | 179 | 30 | 3 |
| 145 | radioactive waste | 2 | 177 | 995 | 872 |
| 145 | industrial waste | 2 | 177 | 1040 | 872 |
| 145 | Hazardous waste | 2 | 177 | 1160 | 923 |
| 145 | Allergy | 1 | 177 | 1183 | 853 |
| 145 | Immunity | 1 | 177 | 1881 | 1338 |
| 150 | natural products | 10 | 175 | 964 | 1032 |
| 151 | Ocean Engineering | 9 | 174 | 975 | 1115 |
| 152 | Cognitive Science | 4 | 173 | 1314 | 1121 |
| 153 | Nanostructures | 4 | 171 | 1684 | 1427 |
| 154 | Computer Vision | 5 | 170 | 861 | 863 |
| 155 | Pharmacology | 3 | 169 | 3585 | 2826 |
| 156 | Public Health | 14 | 167 | 2158 | 2864 |
| 156 | Pharmacognosy | 5 | 167 | 1405 | 1440 |
| 156 | Computational Intelligence | 5 | 167 | 453 | 323 |
| 159 | Cosmology | 4 | 166 | 546 | 424 |
| 159 | Educational Technology | 12 | 166 | 697 | 1093 |
| 159 | nuclear astrophysics | 4 | 166 | 424 | 353 |
| 162 | Plant physiology | 5 | 165 | 1562 | 1619 |
| 163 | Detectors | 8 | 160 | 895 | 992 |
| 164 | United States | 10 | 156 | 2500 | 2725 |
| 165 | Computational Biology | 5 | 155 | 1747 | 1585 |
| 165 | Computational Fluid Dynamics | 4 | 155 | 532 | 410 |
| 167 | Green Chemistry | 5 | 154 | 1311 | 1534 |
| 168 | Entropy | 5 | 153 | 910 | 562 |
| 169 | Neurophysiology | 4 | 149 | 2031 | 1889 |
| 169 | sustainability | 6 | 149 | 533 | 764 |
| 171 | Solid State Physics | 7 | 142 | 2447 | 2292 |
| 171 | Microwaves | 15 | 142 | 595 | 760 |
| 173 | Toxicology | 5 | 141 | 2983 | 3029 |
| 174 | Project Management | 2 | 140 | 348 | 370 |
| 174 | Japan | 3 | 140 | 1712 | 1013 |
| 176 | Alternative Medicine | 9 | 139 | 721 | 1125 |
| 176 | Waste management | 9 | 139 | 741 | 867 |
| 176 | complementary therapies | 9 | 139 | 801 | 1183 |
| 179 | Fluid Mechanics | 3 | 137 | 1396 | 987 |
| 180 | Transportation | 8 | 136 | 959 | 1175 |
| 181 | Bioinorganic chemistry | 6 | 134 | 999 | 1068 |
| 181 | Production Management | 3 | 134 | 1145 | 1193 |
| 183 | Earth Sciences | 8 | 132 | 1960 | 2184 |
| 184 | Islam | 6 | 130 | 249 | 151 |
| 185 | Signal Processing | 8 | 129 | 1555 | 1861 |
| 185 | Physical organic chemistry | 1 | 129 | 1890 | 1029 |
| 187 | Immunotherapy | 1 | 127 | 2057 | 1344 |
| 188 | Evidence-Based Medicine | 5 | 126 | 455 | 501 |
| 188 | supercritical fluids | 2 | 126 | 489 | 361 |
| 190 | Parasitology | 7 | 123 | 1447 | 1555 |
| 191 | Water quality management | 11 | 122 | 853 | 1259 |
| 192 | Industrial Microbiology | 5 | 118 | 1422 | 1765 |
| 192 | Plant genetic engineering | 3 | 118 | 815 | 812 |
| 194 | Industrial Engineering | 6 | 117 | 1237 | 1437 |
| 194 | Intelligent Transportation Systems | 4 | 117 | 933 | 1003 |
| 196 | Physical Chemistry | 3 | 116 | 1952 | 1620 |
| 197 | Nanotechnology | 8 | 115 | 2770 | 3392 |
| 198 | Biocompatible Materials | 2 | 113 | 3180 | 2894 |
| 199 | Environmental Geology | 6 | 110 | 1130 | 1377 |
| 199 | Organometallic compounds | 3 | 110 | 1297 | 1027 |
| 201 | lasers | 6 | 109 | 1550 | 1491 |
| 202 | Neurochemistry | 2 | 108 | 2133 | 1787 |
| 203 | Microbial Biotechnology | 4 | 103 | 842 | 904 |
| 204 | Analytical Chemistry | 10 | 102 | 2324 | 3111 |
| 204 | Herbal medicine | 5 | 102 | 492 | 833 |
| 206 | Educational Psychology | 5 | 101 | 1046 | 1180 |
| 207 | Psychiatry | 11 | 100 | 1881 | 2789 |
| 207 | Ceramic materials | 3 | 100 | 1326 | 1108 |
| 209 | Parasitic Diseases | 4 | 99 | 1493 | 1497 |
| 210 | Epidemiology | 5 | 98 | 2281 | 2412 |
| 211 | Medical Microbiology | 8 | 97 | 1135 | 1828 |
| 211 | Human-Computer Interaction | 5 | 97 | 1155 | 1359 |
| 213 | Ecological Engineering | 1 | 93 | 1093 | 797 |
| 213 | Building | 3 | 93 | 540 | 378 |
| 215 | Biomechanics | 2 | 92 | 1438 | 1119 |
| 215 | Quantum Gravity | 2 | 92 | 1962 | 1580 |
| 215 | software | 2 | 92 | 1247 | 1101 |
| 218 | Sustainable Engineering | 6 | 91 | 1117 | 1627 |
| 219 | commerce | 7 | 90 | 988 | 1336 |
| 220 | Plant Genetics | 1 | 88 | 1018 | 776 |
| 220 | Process Control | 2 | 88 | 1147 | 1245 |
| 220 | Behavioral research | 5 | 88 | 395 | 353 |
| 220 | plant molecular biology | 1 | 88 | 1924 | 1560 |
| 220 | Trace elements | 1 | 88 | 523 | 348 |
| 225 | Parasites | 3 | 86 | 1470 | 1306 |
| 225 | internet | 10 | 86 | 792 | 1431 |
| 227 | Diagnostic Imaging | 4 | 84 | 1404 | 1373 |
| 228 | Econometrics | 3 | 83 | 1329 | 1029 |
| 228 | International Finance | 3 | 83 | 1648 | 1534 |
| 230 | Internet of Things | 8 | 82 | 629 | 1147 |
| 230 | mass transfer | 1 | 82 | 2214 | 1621 |
| 230 | Consciousness | 1 | 82 | 814 | 438 |
| 230 | Cognition | 1 | 82 | 2201 | 1486 |
| 234 | Optoelectronics | 4 | 81 | 439 | 285 |
| 234 | food handling | 3 | 81 | 874 | 1078 |
| 234 | Solutions | 1 | 81 | 702 | 295 |
| 234 | disease vectors | 2 | 81 | 1064 | 921 |
| 238 | Fiber Optics | 4 | 80 | 787 | 818 |
| 239 | Communication | 7 | 79 | 1333 | 1784 |
| 240 | Climatology | 6 | 77 | 1175 | 1627 |
| 240 | Clinical Chemistry | 2 | 77 | 2357 | 2181 |
| 240 | Safety management | 7 | 77 | 262 | 401 |
| 243 | Computer Science | 7 | 74 | 1353 | 1638 |
| 243 | Geophysics | 4 | 74 | 2515 | 2642 |
| 245 | Municipal Engineering | 2 | 73 | 443 | 392 |
| 245 | Fracture mechanics | 5 | 73 | 1062 | 1263 |
| 245 | Mineral resources | 4 | 73 | 506 | 824 |
| 248 | Radiation | 6 | 72 | 1478 | 1700 |
| 248 | Multimedia Systems | 9 | 72 | 1023 | 1544 |
| 250 | Neural circuitry | 8 | 71 | 1244 | 2142 |
| 250 | Stem cells | 3 | 71 | 1108 | 1281 |
| 252 | Health Services Administration | 2 | 70 | 1166 | 913 |
| 252 | Social Psychology | 2 | 70 | 2409 | 2069 |
| 252 | Genomics | 6 | 70 | 1845 | 2568 |
| 255 | Library Science | 2 | 69 | 1172 | 589 |
| 256 | Information Systems | 1 | 67 | 2140 | 1450 |
| 256 | economic policy | 8 | 67 | 1448 | 1763 |
| 256 | Plant diseases | 5 | 67 | 1415 | 1642 |
| 256 | nanoscience | 6 | 67 | 1949 | 2677 |
| 260 | Physiology | 3 | 65 | 3184 | 3359 |
| 260 | Polymer Engineering | 3 | 65 | 91 | 72 |
| 260 | Lipids | 3 | 65 | 1153 | 1387 |
| 263 | Aquaculture | 5 | 64 | 1049 | 1364 |
| 264 | Knowledge management | 3 | 63 | 395 | 319 |
| 264 | Chromosome mapping | 5 | 63 | 1191 | 1828 |
| 264 | gene mapping | 5 | 63 | 1289 | 1993 |
| 267 | Meteorology | 5 | 62 | 1507 | 2130 |
| 267 | bioclimatology | 5 | 62 | 680 | 1047 |
| 269 | Entrepreneurship | 2 | 61 | 1249 | 1355 |
| 269 | Optical materials | 9 | 61 | 1545 | 2508 |
| 269 | Landslides | 1 | 61 | 450 | 414 |
| 272 | Mental Health | 4 | 60 | 1260 | 1484 |
| 272 | Surface-Active Agents | 1 | 60 | 1696 | 1514 |
| 272 | Technological Innovations | 2 | 60 | 1314 | 1245 |
| 272 | Surface properties | 1 | 60 | 1741 | 1563 |
| 276 | Computer Graphics | 5 | 59 | 1319 | 1634 |
| 276 | Geriatric Psychiatry | 1 | 59 | 1358 | 1002 |
| 276 | Nanoparticles | 4 | 59 | 1584 | 1958 |
| 276 | Testing | 2 | 59 | 95 | 66 |
| 280 | Mathematics | 16 | 58 | 3021 | 3992 |
| 281 | Bioremediation | 2 | 57 | 1103 | 1195 |
| 281 | Biodegradation | 1 | 57 | 1278 | 1056 |
| 283 | Child psychology | 5 | 56 | 1030 | 1533 |
| 283 | population geography | 3 | 56 | 389 | 476 |
| 285 | Botany | 4 | 55 | 2823 | 3395 |
| 285 | North America | 6 | 55 | 492 | 769 |
| 285 | rehabilitation | 3 | 55 | 1901 | 2077 |
| 288 | Chemical processes | 8 | 53 | 268 | 602 |
| 289 | environmental indicators | 1 | 52 | 1676 | 1611 |
| 289 | Corporate Social Responsibility | 3 | 52 | 276 | 673 |
| 289 | environmental auditing | 3 | 52 | 289 | 680 |
| 289 | Therapeutics | 2 | 52 | 1490 | 1567 |
| 289 | Molecular structure | 2 | 52 | 2693 | 2337 |
| 289 | Developing countries | 3 | 52 | 2196 | 2315 |
| 289 | Biodiversity | 2 | 52 | 2317 | 2155 |
| 296 | Oxidative stress | 2 | 51 | 971 | 1367 |
| 296 | Cell survival | 2 | 51 | 258 | 353 |
| 296 | healthcare industry | 1 | 51 | 105 | 46 |
| 296 | drugs | 3 | 51 | 1716 | 1961 |
| 296 | pharmaceutical industry | 2 | 51 | 697 | 649 |
| 296 | molecular chaperones | 2 | 51 | 301 | 357 |
| 302 | miniaturization | 2 | 50 | 1923 | 2031 |
| 303 | Statistics | 6 | 49 | 1770 | 1978 |
| 303 | Biomass | 2 | 49 | 871 | 1106 |
| 305 | Pharmaceutical Chemistry | 1 | 48 | 3658 | 3153 |
| 305 | Cross-Cultural Studies | 7 | 48 | 375 | 900 |
| 305 | Drug delivery systems | 2 | 48 | 1735 | 1861 |
| 305 | Teaching | 2 | 48 | 2069 | 1771 |
| 305 | cross-cultural comparison | 7 | 48 | 257 | 627 |
| 310 | Visual Communication | 3 | 47 | 447 | 497 |
| 310 | Sustainable agriculture | 3 | 47 | 688 | 938 |
| 310 | Flexible electronics | 1 | 47 | 167 | 204 |
| 310 | Image enhancement | 3 | 47 | 348 | 454 |
| 310 | Calorimetry | 3 | 47 | 1256 | 1336 |
| 310 | Zeolites | 1 | 47 | 1385 | 1328 |
| 310 | Algae | 2 | 47 | 808 | 853 |
| 310 | insurance | 2 | 47 | 467 | 423 |
| 310 | Thermal analysis | 3 | 47 | 1256 | 1336 |
| 319 | Organizational change | 1 | 46 | 1255 | 908 |
| 319 | Combinatorial chemistry | 1 | 46 | 1055 | 1044 |
| 319 | Water Purification | 4 | 46 | 979 | 1276 |
| 322 | monetary policy | 5 | 45 | 15 | 30 |
| 323 | Energy Consumption | 1 | 44 | 705 | 668 |
| 324 | Ethics | 2 | 43 | 1108 | 987 |
| 324 | Emulsions | 4 | 43 | 293 | 387 |
| 326 | Endocrinology | 2 | 42 | 2391 | 2630 |
| 326 | Public Policy | 2 | 42 | 1918 | 2091 |
| 326 | Hypertension | 1 | 42 | 1517 | 1512 |
| 326 | Edible plants | 2 | 42 | 285 | 454 |
| 326 | Hormones | 2 | 42 | 1208 | 1391 |
| 326 | Philippines | 2 | 42 | 146 | 150 |
| 332 | Telecommunication Systems | 10 | 41 | 850 | 1670 |
| 332 | energy development | 3 | 41 | 825 | 1301 |
| 334 | Land use | 2 | 40 | 1341 | 1580 |
| 334 | Antibacterial agents | 1 | 40 | 935 | 981 |
| 334 | antibiotics | 1 | 40 | 425 | 374 |
| 334 | Agriculture | 3 | 40 | 1957 | 2295 |
| 338 | Porous materials | 1 | 39 | 1279 | 900 |
| 339 | Membranes | 2 | 38 | 1681 | 2012 |
| 340 | Genetics | 7 | 37 | 2000 | 3441 |
| 340 | Geriatrics | 4 | 37 | 2070 | 2609 |
| 340 | Computer Engineering | 2 | 37 | 1253 | 1241 |
| 340 | Electrophoresis | 3 | 37 | 1473 | 1856 |
| 340 | Entomology | 4 | 37 | 1853 | 2146 |
| 345 | Transportation Engineering | 2 | 36 | 367 | 486 |
| 345 | innovation | 1 | 36 | 1022 | 1063 |
| 345 | research and development | 1 | 36 | 595 | 583 |
| 348 | Crisis management | 2 | 35 | 186 | 240 |
| 348 | Cellulose | 2 | 35 | 779 | 1071 |
| 350 | Heritage Tourism | 1 | 34 | 285 | 241 |
| 350 | cultural tourism | 1 | 34 | 285 | 241 |
| 352 | Drying | 1 | 33 | 670 | 591 |
| 352 | Natural history | 2 | 33 | 3146 | 3606 |
| 354 | School Psychology | 1 | 32 | 723 | 710 |
| 354 | Virology | 5 | 32 | 1728 | 2877 |
| 354 | peptides | 1 | 32 | 1293 | 1069 |
| 354 | Aging | 5 | 32 | 1765 | 2618 |
| 354 | Cancer | 3 | 32 | 2153 | 3007 |
| 354 | proteins | 1 | 32 | 2402 | 2217 |
| 360 | Global Health | 4 | 31 | 853 | 1347 |
| 360 | Neurotoxicology | 1 | 31 | 959 | 1054 |
| 360 | Nanotubes | 1 | 31 | 422 | 231 |
| 363 | Structural Engineering | 3 | 30 | 1481 | 1811 |
| 363 | Production Engineering | 2 | 30 | 2135 | 2241 |
| 363 | Plant Biotechnology | 2 | 30 | 908 | 1143 |
| 363 | Wales | 1 | 30 | 275 | 137 |
| 367 | Marine Biology | 3 | 29 | 2150 | 2846 |
| 367 | Nursing | 1 | 29 | 2627 | 2113 |
| 367 | Macroeconomics | 1 | 29 | 654 | 520 |
| 367 | Nanostructured Materials | 2 | 29 | 2762 | 3181 |
| 367 | Microprocessors | 1 | 29 | 1025 | 845 |
| 367 | Marine Pollution | 2 | 29 | 1360 | 1847 |
| 373 | Stochastic Processes | 3 | 28 | 936 | 1162 |
| 373 | Human Rights | 1 | 28 | 984 | 738 |
| 373 | solar power | 2 | 28 | 993 | 1415 |
| 373 | Social Entrepreneurship | 1 | 28 | 310 | 340 |
| 373 | clay | 1 | 28 | 1271 | 1450 |
| 373 | Adolescent | 3 | 28 | 1853 | 2339 |
| 373 | solar cells | 2 | 28 | 1056 | 1485 |
| 373 | Microstructure | 2 | 28 | 1157 | 1177 |
| 373 | Food preferences | 2 | 28 | 480 | 702 |
| 382 | Metabolism | 1 | 27 | 2463 | 2624 |
| 382 | Imaging systems | 4 | 27 | 694 | 965 |
| 384 | Nondestructive testing | 1 | 26 | 1076 | 953 |
| 384 | Manufacturing Processes | 2 | 26 | 2372 | 2610 |
| 384 | Cell Biology | 3 | 26 | 2778 | 3785 |
| 384 | Structural health monitoring | 1 | 26 | 373 | 441 |
| 384 | structural stability | 1 | 26 | 515 | 620 |
| 384 | Child Development | 3 | 26 | 1592 | 2242 |
| 390 | Total Quality Management | 1 | 25 | 1084 | 1075 |
| 390 | vibration | 2 | 25 | 1316 | 1602 |
| 390 | nuclear magnetic resonance | 2 | 25 | 1029 | 1089 |
| 390 | Magnetic Resonance Spectroscopy | 2 | 25 | 1198 | 1263 |
| 390 | Physical fitness | 2 | 25 | 1170 | 1473 |
| 395 | Mental illness | 3 | 24 | 1479 | 2257 |
| 396 | Occupational Therapy | 6 | 23 | 644 | 1103 |
| 396 | Occupational Health | 6 | 23 | 649 | 1357 |
| 396 | Demography | 2 | 23 | 761 | 988 |
| 396 | Industrial Safety | 6 | 23 | 781 | 1692 |
| 396 | industrial hygiene | 6 | 23 | 630 | 1227 |
| 396 | poverty | 2 | 23 | 526 | 802 |
| 396 | vascular diseases | 1 | 23 | 876 | 1030 |
| 396 | Capital market | 1 | 23 | 810 | 863 |
| 404 | Quality Management | 1 | 22 | 374 | 319 |
| 404 | Simulation Methods | 1 | 22 | 1728 | 1616 |
| 404 | Pest control | 1 | 22 | 268 | 245 |
| 404 | Pesticides | 1 | 22 | 1113 | 1133 |
| 404 | Probiotics | 1 | 22 | 425 | 507 |
| 409 | Information Theory | 1 | 21 | 1869 | 1709 |
| 409 | Environmental Toxicology | 3 | 21 | 2173 | 3290 |
| 409 | Virtual reality | 1 | 21 | 753 | 738 |
| 409 | Food service management | 2 | 21 | 545 | 1045 |
| 409 | Coding Theory | 1 | 21 | 657 | 477 |
| 409 | Mycology | 1 | 21 | 1973 | 1998 |
| 409 | recreation | 1 | 21 | 1054 | 960 |
| 409 | Investments | 1 | 21 | 1011 | 950 |
| 409 | Leisure | 1 | 21 | 581 | 687 |
| 409 | Psychophysiology | 1 | 21 | 3016 | 3150 |
| 419 | Hydrogeology | 1 | 20 | 1055 | 1139 |
| 419 | Pharmaceutical Technology | 1 | 20 | 1940 | 2131 |
| 419 | Geothermal Energy | 1 | 20 | 468 | 559 |
| 419 | Geographic information systems | 4 | 20 | 965 | 1597 |
| 419 | Mental Disorders | 2 | 20 | 2484 | 3114 |
| 419 | Hospitality industry | 1 | 20 | 812 | 977 |
| 419 | water supply | 3 | 20 | 817 | 1461 |
| 419 | foods | 3 | 20 | 104 | 351 |
| 419 | Microscopy | 2 | 20 | 1583 | 1800 |
| 419 | Insects | 2 | 20 | 1578 | 1805 |
| 429 | Telecommunications | 3 | 19 | 809 | 1259 |
| 429 | Regional Planning | 1 | 19 | 2084 | 2065 |
| 429 | Sports Medicine | 4 | 19 | 1965 | 2682 |
| 429 | Social policy | 1 | 19 | 1609 | 1526 |
| 429 | planning | 1 | 19 | 1324 | 1364 |
| 434 | Thermodynamics | 1 | 18 | 1863 | 1604 |
| 434 | Ceramics | 1 | 18 | 2003 | 1892 |
| 434 | Thermochemistry | 1 | 18 | 768 | 826 |
| 434 | Water Conservation | 1 | 18 | 167 | 183 |
| 434 | international trade | 4 | 18 | 625 | 1208 |
| 434 | landscapes | 1 | 18 | 397 | 425 |
| 434 | Central Asia | 1 | 18 | 409 | 465 |
| 434 | Pathogens | 2 | 18 | 133 | 335 |
| 442 | Cybernetics | 2 | 17 | 1758 | 2288 |
| 442 | Structural dynamics | 1 | 17 | 1327 | 1575 |
| 442 | Veterinary Pathology | 1 | 17 | 552 | 539 |
| 442 | Animal breeding | 1 | 17 | 1097 | 1162 |
| 442 | industrial relations | 4 | 17 | 724 | 1310 |
| 442 | Reproduction | 1 | 17 | 2448 | 2542 |
| 442 | food industry | 2 | 17 | 1001 | 1381 |
| 442 | Breeding | 1 | 17 | 1587 | 1730 |
| 450 | Phytochemistry | 2 | 16 | 398 | 782 |
| 450 | Genetic engineering | 3 | 16 | 1761 | 2738 |
| 450 | Green Technology | 1 | 16 | 869 | 1092 |
| 450 | Phytoremediation | 2 | 16 | 398 | 782 |
| 450 | Molecular cloning | 4 | 16 | 1147 | 2095 |
| 450 | environmental remediation | 2 | 16 | 480 | 892 |
| 450 | Genetic recombination | 3 | 16 | 1296 | 2070 |
| 450 | Bioreactors | 2 | 16 | 398 | 782 |
| 450 | Hydraulic structures | 1 | 16 | 96 | 76 |
| 450 | Recombinant DNA | 3 | 16 | 1360 | 2151 |
| 460 | Public Relations | 1 | 15 | 807 | 869 |
| 460 | Developmental Psychology | 1 | 15 | 1510 | 1623 |
| 460 | Biochemical Genetics | 3 | 15 | 455 | 731 |
| 460 | Engineering Ethics | 1 | 15 | 379 | 501 |
| 460 | Quantum electronics | 2 | 15 | 1791 | 2090 |
| 460 | Geochemistry | 1 | 15 | 2340 | 2618 |
| 460 | Child | 1 | 15 | 2707 | 2759 |
| 460 | Geodesy | 1 | 15 | 1266 | 1359 |
| 460 | Chromatography | 1 | 15 | 2089 | 2283 |
| 460 | Mental Health Services | 1 | 15 | 1571 | 1750 |
| 460 | Professional ethics | 1 | 15 | 547 | 701 |
| 460 | Nervous system | 1 | 15 | 2746 | 3062 |
| 460 | human development | 1 | 15 | 1227 | 1462 |
| 460 | Chromatographic analysis | 1 | 15 | 2338 | 2453 |
| 460 | adulthood | 1 | 15 | 241 | 314 |
| 475 | Environmental pollutants | 2 | 14 | 2333 | 3324 |
| 476 | Hematology | 3 | 13 | 1436 | 2129 |
| 476 | Optical Communications | 2 | 13 | 927 | 1241 |
| 476 | genre | 2 | 13 | 277 | 574 |
| 476 | health services accessibility | 2 | 13 | 1048 | 1585 |
| 476 | Biometrics | 1 | 13 | 1353 | 1407 |
| 476 | Bacteria | 1 | 13 | 531 | 784 |
| 476 | Bacterial infections | 1 | 13 | 1136 | 1500 |
| 476 | optical devices | 1 | 13 | 817 | 942 |
| 476 | data protection | 4 | 13 | 464 | 1145 |
| 485 | Immunology | 2 | 12 | 2603 | 3497 |
| 485 | Dermatology | 1 | 12 | 1754 | 1911 |
| 485 | Energy Conversion | 1 | 12 | 1606 | 1956 |
| 485 | Serology | 2 | 12 | 605 | 1087 |
| 485 | Human Geography | 1 | 12 | 1655 | 1744 |
| 485 | Economic Development | 3 | 12 | 1495 | 2503 |
| 485 | Photonics | 1 | 12 | 2241 | 2552 |
| 485 | Coastal zone management | 1 | 12 | 1076 | 1377 |
| 485 | Parallel Processing | 1 | 12 | 687 | 920 |
| 485 | Bacteriology | 2 | 12 | 1745 | 2624 |
| 485 | Laser therapy | 1 | 12 | 740 | 810 |
| 485 | Latin America | 2 | 12 | 1344 | 1403 |
| 485 | environmental exposure | 2 | 12 | 2067 | 3089 |
| 485 | Roads | 1 | 12 | 965 | 1006 |
| 499 | Astronomy | 1 | 11 | 2839 | 3019 |
| 499 | Organizational learning | 1 | 11 | 990 | 1148 |
| 499 | Biodiversity conservation | 1 | 11 | 1950 | 2402 |
| 499 | Industrial Policy | 1 | 11 | 818 | 983 |
| 499 | Gerontology | 4 | 11 | 1487 | 2493 |
| 499 | pollutants | 1 | 11 | 2495 | 3099 |
| 499 | Sound | 2 | 11 | 1217 | 1549 |
| 499 | Pacific Islands | 2 | 11 | 410 | 661 |
| 499 | Navier-Stokes equations | 1 | 11 | 314 | 298 |
| 508 | Kinesiology | 1 | 10 | 335 | 505 |
| 508 | Linguistics | 1 | 10 | 1900 | 1821 |
| 508 | Hydraulic Engineering | 2 | 10 | 965 | 1413 |
| 508 | Kinetics | 1 | 10 | 902 | 1108 |
| 508 | radiative transfer | 1 | 10 | 911 | 1017 |
| 508 | Mass Media | 4 | 10 | 712 | 1173 |
| 508 | Magnetic Materials | 1 | 10 | 1954 | 2165 |
| 508 | Obesity | 1 | 10 | 2157 | 2743 |
| 508 | sadness | 2 | 10 | 314 | 698 |
| 508 | Eastern Europe | 1 | 10 | 1506 | 1436 |
| 508 | Ethnology | 1 | 10 | 2188 | 2157 |
| 508 | Language planning | 1 | 10 | 341 | 325 |
| 508 | Tropical Medicine | 1 | 10 | 2263 | 2640 |
| 508 | Prisons | 1 | 10 | 521 | 595 |
| 508 | Language spread | 1 | 10 | 36 | 29 |
| 508 | death | 2 | 10 | 434 | 799 |
| 508 | Australia | 1 | 10 | 2664 | 2896 |
| 508 | Suicide | 2 | 10 | 649 | 1181 |
| 508 | antisocial personality disorder | 2 | 10 | 314 | 698 |
| 527 | Geometry | 1 | 9 | 1660 | 1505 |
| 527 | Algebra | 2 | 9 | 1668 | 1734 |
| 527 | Systems Biology | 1 | 9 | 1945 | 2521 |
| 527 | Mathematical Physics | 1 | 9 | 3485 | 3375 |
| 527 | Microfabrication | 1 | 9 | 639 | 817 |
| 527 | Quality Assurance | 2 | 9 | 439 | 945 |
| 527 | Real Estate Investment | 1 | 9 | 307 | 399 |
| 527 | Bioinformatics | 2 | 9 | 2100 | 2946 |
| 527 | personality | 1 | 9 | 2048 | 2490 |
| 527 | Dementia | 2 | 9 | 1321 | 1455 |
| 527 | Alzheimer's disease | 2 | 9 | 1335 | 1508 |
| 527 | Women's health | 1 | 9 | 1854 | 2218 |
| 527 | police | 3 | 9 | 384 | 668 |
| 527 | Disease | 1 | 9 | 530 | 801 |
| 541 | Mechanical Engineering | 1 | 8 | 3033 | 3185 |
| 541 | Organic Chemistry | 2 | 8 | 2948 | 3781 |
| 541 | Power Electronics | 1 | 8 | 1354 | 1624 |
| 541 | Systems Analysis | 1 | 8 | 1789 | 2203 |
| 541 | Metallurgy | 3 | 8 | 2023 | 2876 |
| 541 | Schizophrenia | 1 | 8 | 1168 | 1448 |
| 541 | Noise | 1 | 8 | 310 | 395 |
| 541 | System analysis | 1 | 8 | 3106 | 3585 |
| 541 | nucleic acids | 1 | 8 | 1829 | 2259 |
| 541 | Africa | 1 | 8 | 2339 | 2408 |
| 541 | Condensed Matter | 1 | 8 | 3156 | 3454 |
| 541 | Industry | 1 | 8 | 433 | 832 |
| 541 | Metals | 2 | 8 | 2140 | 2842 |
| 554 | Sustainable Architecture | 1 | 7 | 380 | 472 |
| 554 | Journalism | 1 | 7 | 899 | 1002 |
| 554 | Neonatology | 1 | 7 | 942 | 1308 |
| 554 | Algorithms | 1 | 7 | 1221 | 1393 |
| 554 | adolescence | 1 | 7 | 1437 | 1859 |
| 554 | microwave communication systems | 1 | 7 | 604 | 797 |
| 554 | motivation | 1 | 7 | 658 | 966 |
| 554 | libraries | 1 | 7 | 966 | 963 |
| 554 | Learning | 1 | 7 | 1723 | 2203 |
| 554 | technical education | 1 | 7 | 1147 | 1466 |
| 554 | Microwave devices | 1 | 7 | 701 | 866 |
| 554 | Genes | 1 | 7 | 1549 | 1973 |
| 566 | Soil Mechanics | 1 | 6 | 1425 | 1725 |
| 566 | Development Economics | 1 | 6 | 762 | 1060 |
| 566 | Mineralogy | 1 | 6 | 1742 | 2064 |
| 566 | Integrated Optics | 1 | 6 | 166 | 183 |
| 566 | community development | 1 | 6 | 1018 | 1344 |
| 566 | Health | 1 | 6 | 2844 | 3501 |
| 566 | Child welfare | 1 | 6 | 1664 | 2093 |
| 566 | Health promotion | 1 | 6 | 1627 | 2015 |
| 566 | Employee rights | 2 | 6 | 116 | 279 |
| 566 | Social work | 1 | 6 | 1993 | 2341 |
| 576 | Mass Communication | 2 | 5 | 17 | 38 |
| 576 | Mobile Computing | 2 | 5 | 1274 | 2033 |
| 576 | Higher Education | 1 | 5 | 1108 | 1472 |
| 576 | Developmental Biology | 2 | 5 | 1869 | 2984 |
| 576 | Information visualization | 1 | 5 | 379 | 559 |
| 576 | School choice | 1 | 5 | 97 | 154 |
| 576 | Academic achievement | 1 | 5 | 112 | 184 |
| 576 | Evolutionary Computation | 1 | 5 | 836 | 1255 |
| 576 | Swarm Intelligence | 2 | 5 | 396 | 926 |
| 576 | Watershed management | 1 | 5 | 515 | 826 |
| 576 | Housing | 1 | 5 | 835 | 1220 |
| 576 | visualization | 1 | 5 | 2120 | 1924 |
| 576 | Communication research | 2 | 5 | 17 | 38 |
| 576 | immigrants | 1 | 5 | 75 | 150 |
| 576 | Minority Health | 1 | 5 | 204 | 349 |
| 576 | viruses | 1 | 5 | 1546 | 2124 |
| 576 | Combinatorial analysis | 5 | 5 | 813 | 1518 |
| 576 | Fuzzy systems | 5 | 5 | 1334 | 2904 |
| 576 | Europe | 3 | 5 | 2609 | 4103 |
| 595 | Musicology | 1 | 4 | 417 | 485 |
| 595 | Evolutionary Genetics | 1 | 4 | 1124 | 1645 |
| 595 | Molecular Epidemiology | 1 | 4 | 1124 | 1645 |
| 595 | Food Preservation | 2 | 4 | 1003 | 1792 |
| 595 | Music | 1 | 4 | 1406 | 1609 |
| 595 | behavioral medicine | 2 | 4 | 1427 | 2580 |
| 595 | older people | 2 | 4 | 1675 | 2373 |
| 595 | data collection | 1 | 4 | 1684 | 2378 |
| 595 | Migration | 1 | 4 | 403 | 663 |
| 595 | Continental shelf | 1 | 4 | 560 | 851 |
| 595 | Work | 1 | 4 | 600 | 807 |
| 595 | Cognitive Learning | 1 | 4 | 256 | 420 |
| 595 | biological agents | 2 | 4 | 899 | 1395 |
| 595 | Catalysts | 1 | 4 | 1116 | 1546 |
| 609 | Robotics | 3 | 3 | 1614 | 2865 |
| 609 | Graph Theory | 3 | 3 | 768 | 1357 |
| 609 | Plant tissue culture | 1 | 3 | 1086 | 1569 |
| 609 | Ferroelectricity | 1 | 3 | 1443 | 1734 |
| 609 | Marine resources | 1 | 3 | 1104 | 1707 |
| 609 | toxicity testing | 1 | 3 | 1012 | 1590 |
| 609 | concrete | 1 | 3 | 1311 | 1806 |
| 609 | Plant cell culture | 1 | 3 | 1011 | 1546 |
| 609 | Ultrasound | 1 | 3 | 1070 | 1566 |
| 609 | Radio frequency | 1 | 3 | 690 | 1043 |
| 609 | Exercise | 1 | 3 | 2189 | 2660 |
| 609 | Plants | 1 | 3 | 2550 | 3235 |
| 621 | Zoology | 1 | 2 | 3017 | 3736 |
| 621 | Pathology | 1 | 2 | 2125 | 2867 |
| 621 | Photography | 1 | 2 | 1442 | 1463 |
| 621 | Regenerative Medicine | 1 | 2 | 307 | 630 |
| 621 | Micropaleontology | 1 | 2 | 252 | 358 |
| 621 | infrared radiation | 1 | 2 | 1004 | 1419 |
| 621 | Bioavailability | 1 | 2 | 194 | 468 |
| 621 | microwave antennas | 1 | 2 | 657 | 948 |
| 621 | Sikhism | 2 | 2 | 37 | 80 |
| 621 | Radio wave propagation | 2 | 2 | 829 | 1496 |
| 621 | Intelligent Control Systems | 3 | 2 | 1251 | 2443 |
| 621 | Korea | 1 | 2 | 683 | 1002 |
| 621 | Luminescence | 1 | 2 | 1941 | 2581 |
| 621 | geological modeling | 1 | 2 | 939 | 1474 |
| 621 | medical education | 1 | 2 | 2252 | 3018 |
| 621 | Futures | 1 | 2 | 541 | 837 |
| 621 | mammals | 1 | 2 | 1388 | 1939 |
| 621 | genome | 1 | 2 | 1851 | 2597 |
| 621 | women | 1 | 2 | 1472 | 1940 |
| 621 | Spiders | 1 | 2 | 41 | 54 |
| 621 | rivers | 1 | 2 | 506 | 934 |
| 642 | Anatomy | 1 | 1 | 2396 | 3117 |
| 642 | Ergonomics | 1 | 1 | 1343 | 1906 |
| 642 | Cryptography | 1 | 1 | 1127 | 1520 |
| 642 | Adult Education | 1 | 1 | 1056 | 1636 |
| 642 | economic indicators | 1 | 1 | 206 | 450 |
| 642 | stem cell transplantation | 1 | 1 | 104 | 208 |
| 642 | occupational diseases | 1 | 1 | 1141 | 1855 |
| 642 | Chemical kinetics | 1 | 1 | 1277 | 1812 |
| 642 | Database Security | 1 | 1 | 192 | 425 |
| 642 | Molecules | 1 | 1 | 2030 | 2649 |
| 642 | Elderly | 1 | 1 | 1707 | 1900 |
| 653 | Law | 1 | 0 | 1835 | 2451 |
| 653 | Software Engineering | 1 | 0 | 1462 | 2104 |
| 653 | Orthopedics | 1 | 0 | 1637 | 2323 |
| 653 | Software Maintenance | 1 | 0 | 401 | 732 |
| 653 | Microbial Ecology | 1 | 0 | 2574 | 3514 |
| 653 | Energy Storage | 1 | 0 | 1760 | 2456 |
| 653 | Animal Behavior | 1 | 0 | 2280 | 3228 |
| 653 | Remote Sensing | 2 | 0 | 1728 | 3014 |
| 653 | Analytical Biochemistry | 1 | 0 | 2266 | 3157 |
| 653 | emergency management | 1 | 0 | 1139 | 1913 |
| 653 | Sensor Networks | 1 | 0 | 528 | 942 |
| 653 | Water quality | 1 | 0 | 523 | 1114 |
| 653 | Parenteral nutrition | 1 | 0 | 1207 | 1747 |
| 653 | Global warming | 2 | 0 | 191 | 654 |
| 653 | Formal Languages | 1 | 0 | 568 | 902 |
| 653 | Computational Complexity | 1 | 0 | 1641 | 2386 |
| 653 | Optoelectronic devices | 1 | 0 | 1556 | 2211 |
| 653 | polar regions | 1 | 0 | 932 | 1405 |
| 653 | Alloys | 1 | 0 | 597 | 1019 |
| 653 | Host-parasite interactions | 1 | 0 | 1507 | 2276 |
| 653 | Antarctica | 1 | 0 | 843 | 1279 |
| 653 | Water chemistry | 1 | 0 | 761 | 1445 |
| 653 | child behavior | 1 | 0 | 609 | 1029 |
| 653 | World Wide Web | 1 | 0 | 838 | 1528 |
| 653 | cloning | 1 | 0 | 779 | 1179 |
| 653 | sports injuries | 1 | 0 | 912 | 1447 |