| 1 | Mathematics | 137 | 4.1K | 1076 | 554 |
| 2 | Artificial Intelligence | 123 | 3.5K | 326 | 428 |
| 3 | Chemistry | 155 | 3.2K | 1557 | 1888 |
| 4 | Fuzzy systems | 116 | 2.6K | 25 | 24 |
| 5 | Earth Sciences | 83 | 2.3K | 464 | 520 |
| 6 | Colloids | 29 | 2.1K | 1313 | 882 |
| 7 | Surface Chemistry | 26 | 2.1K | 1414 | 837 |
| 8 | Operations Research | 84 | 2.0K | 250 | 362 |
| 9 | Environmental Engineering | 48 | 1.8K | 741 | 759 |
| 10 | Nanotechnology | 41 | 1.8K | 1411 | 1292 |
| 11 | geological modeling | 44 | 1.7K | 22 | 46 |
| 12 | Biomedical Engineering | 35 | 1.6K | 1426 | 1140 |
| 13 | System analysis | 40 | 1.6K | 475 | 333 |
| 14 | Biotechnology | 51 | 1.5K | 1363 | 1551 |
| 15 | Biochemistry | 52 | 1.5K | 2259 | 2252 |
| 16 | Intelligent Control Systems | 67 | 1.5K | 39 | 24 |
| 17 | computer networks | 17 | 1.5K | 996 | 419 |
| 18 | Human-Computer Interaction | 13 | 1.4K | 599 | 167 |
| 19 | Engineering | 38 | 1.4K | 1123 | 680 |
| 20 | Numerical Analysis | 82 | 1.4K | 230 | 292 |
| 21 | Microbiology | 62 | 1.4K | 1315 | 1686 |
| 22 | Toxicology | 31 | 1.2K | 1391 | 1250 |
| 23 | Physics | 73 | 1.0K | 2103 | 3057 |
| 24 | health planning | 17 | 1.0K | 810 | 333 |
| 25 | Molecular Biology | 44 | 897 | 2037 | 2480 |
| 26 | Environment | 22 | 874 | 1696 | 2011 |
| 27 | Environmental Management | 17 | 843 | 1184 | 1121 |
| 28 | nanoscience | 16 | 821 | 1247 | 1086 |
| 29 | Biomass Energy | 22 | 816 | 810 | 965 |
| 30 | Economics | 28 | 752 | 1449 | 1191 |
| 31 | Nuclear Physics | 49 | 749 | 1315 | 1509 |
| 32 | mathematical analysis | 33 | 698 | 820 | 597 |
| 33 | Simulation Methods | 13 | 694 | 327 | 83 |
| 34 | Materials | 31 | 684 | 2029 | 2121 |
| 35 | Information Science | 16 | 676 | 1031 | 833 |
| 36 | Pharmacology | 16 | 655 | 2031 | 1763 |
| 37 | Science | 34 | 650 | 2753 | 3543 |
| 38 | Geographic information systems | 28 | 618 | 159 | 140 |
| 39 | Engineering Mathematics | 35 | 600 | 370 | 428 |
| 40 | Systems Engineering | 23 | 591 | 648 | 661 |
| 41 | Medicine | 21 | 577 | 3356 | 3297 |
| 42 | Environmental Policy | 29 | 576 | 901 | 1448 |
| 43 | Molecular structure | 23 | 567 | 792 | 773 |
| 44 | Multimedia Systems | 33 | 539 | 346 | 437 |
| 45 | Computational Intelligence | 14 | 537 | 159 | 94 |
| 46 | Ecology | 27 | 536 | 2121 | 2892 |
| 47 | Sustainable Development | 25 | 531 | 414 | 767 |
| 47 | Pharmacognosy | 5 | 531 | 1405 | 762 |
| 49 | Nanostructured Materials | 13 | 528 | 1506 | 1382 |
| 50 | Bioengineering | 15 | 484 | 1812 | 1942 |
| 51 | Research | 15 | 480 | 3509 | 3105 |
| 52 | Environmental Health | 20 | 475 | 1979 | 2346 |
| 53 | Biochemical Engineering | 10 | 464 | 1755 | 1861 |
| 54 | econometric models | 6 | 455 | 374 | 129 |
| 55 | Biology | 18 | 451 | 3313 | 3805 |
| 56 | Photochemistry | 18 | 448 | 578 | 643 |
| 57 | Computational Complexity | 10 | 438 | 472 | 128 |
| 58 | Chemical Engineering | 16 | 429 | 2094 | 2235 |
| 59 | Statistical physics | 9 | 424 | 1945 | 1424 |
| 60 | Medicinal plants | 8 | 421 | 771 | 647 |
| 61 | Pollution | 13 | 414 | 2558 | 2761 |
| 62 | Biocompatible Materials | 14 | 413 | 1674 | 1929 |
| 62 | management | 27 | 413 | 1143 | 1698 |
| 64 | city planning | 5 | 409 | 1194 | 608 |
| 65 | Solid State Physics | 20 | 401 | 1672 | 1612 |
| 66 | Cognitive Science | 13 | 392 | 642 | 720 |
| 67 | environmental indicators | 5 | 386 | 882 | 590 |
| 68 | Catalysis | 15 | 375 | 1743 | 1940 |
| 69 | Data Mining | 2 | 372 | 1923 | 677 |
| 69 | Social Networks | 2 | 372 | 410 | 97 |
| 69 | Online social networks | 2 | 372 | 398 | 47 |
| 72 | Dynamics | 9 | 370 | 923 | 479 |
| 73 | actuators | 7 | 368 | 1455 | 1155 |
| 73 | transducers | 7 | 368 | 1455 | 1155 |
| 75 | Food | 17 | 362 | 1271 | 1614 |
| 76 | Virology | 5 | 360 | 1728 | 1475 |
| 77 | Solid State Chemistry | 17 | 345 | 1167 | 1139 |
| 78 | Cybernetics | 7 | 342 | 1023 | 783 |
| 79 | India | 52 | 337 | 87 | 159 |
| 80 | Environmental Toxicology | 10 | 335 | 1254 | 1317 |
| 80 | Photobiology | 16 | 335 | 414 | 568 |
| 82 | Economic History | 31 | 330 | 940 | 1234 |
| 83 | hazard mitigation | 5 | 323 | 649 | 347 |
| 84 | Environmental pollutants | 9 | 320 | 1252 | 1228 |
| 85 | Asia | 31 | 317 | 599 | 923 |
| 86 | Cell Biology | 11 | 316 | 1758 | 1998 |
| 87 | Mechatronics | 4 | 312 | 764 | 397 |
| 88 | Bioinorganic chemistry | 8 | 306 | 867 | 699 |
| 89 | Geophysics | 22 | 304 | 1246 | 1660 |
| 90 | Computer Science | 10 | 301 | 1068 | 705 |
| 91 | Neural circuitry | 16 | 294 | 804 | 1131 |
| 92 | Remote Sensing | 15 | 291 | 556 | 510 |
| 93 | Environmental monitoring | 14 | 285 | 1774 | 2332 |
| 94 | environmental protection | 12 | 281 | 1767 | 2030 |
| 95 | Nanostructures | 11 | 276 | 985 | 1136 |
| 96 | Organometallic chemistry | 15 | 272 | 942 | 916 |
| 97 | Environmental Geology | 10 | 267 | 844 | 893 |
| 98 | Risk Management | 8 | 265 | 302 | 279 |
| 99 | Aquaculture | 13 | 263 | 634 | 710 |
| 100 | Meteorology | 11 | 262 | 1052 | 1284 |
| 101 | Cytology | 8 | 259 | 2124 | 2200 |
| 102 | Industrial Microbiology | 14 | 254 | 780 | 1243 |
| 103 | Coastal zone management | 5 | 247 | 473 | 310 |
| 103 | Africa | 14 | 247 | 571 | 476 |
| 105 | Middle East | 3 | 244 | 1034 | 279 |
| 106 | Islamic Architecture | 2 | 243 | 113 | 23 |
| 107 | China | 4 | 242 | 2301 | 1397 |
| 107 | body temperature | 2 | 242 | 696 | 167 |
| 109 | Optics | 32 | 240 | 1452 | 1878 |
| 110 | Quantum Gravity | 17 | 236 | 1048 | 1233 |
| 111 | environmental pollution | 8 | 235 | 2541 | 2786 |
| 111 | Spectrum analysis | 19 | 235 | 1827 | 2292 |
| 113 | Zoology | 22 | 230 | 894 | 1172 |
| 114 | Watershed management | 12 | 225 | 19 | 31 |
| 115 | Bioorganic chemistry | 11 | 224 | 1473 | 1681 |
| 116 | economic policy | 13 | 222 | 1122 | 991 |
| 117 | Technology | 10 | 220 | 1976 | 2014 |
| 118 | Pharmacy | 3 | 216 | 1798 | 1195 |
| 119 | Botany | 10 | 215 | 2037 | 2282 |
| 120 | Geography | 7 | 211 | 1287 | 1197 |
| 120 | Biosensors | 1 | 211 | 1720 | 1114 |
| 120 | Reproductive toxicology | 5 | 211 | 248 | 233 |
| 123 | biological factors | 4 | 210 | 1622 | 1086 |
| 124 | pollutants | 5 | 209 | 1386 | 1320 |
| 124 | environmental exposure | 5 | 209 | 1432 | 1265 |
| 126 | Analytical Chemistry | 11 | 208 | 2247 | 2519 |
| 127 | water reuse | 5 | 205 | 179 | 165 |
| 128 | Human Geography | 18 | 198 | 389 | 581 |
| 129 | Process Control | 4 | 195 | 818 | 864 |
| 129 | Production Management | 4 | 195 | 990 | 1032 |
| 131 | Analytical Biochemistry | 7 | 194 | 1093 | 1001 |
| 132 | Fuzzy Logic | 5 | 193 | 27 | 29 |
| 132 | Fuzzy Sets | 5 | 193 | 27 | 29 |
| 132 | Fuzzy algorithms | 5 | 193 | 27 | 29 |
| 132 | Decision making | 5 | 193 | 1068 | 840 |
| 136 | Alternative Medicine | 5 | 189 | 1067 | 936 |
| 137 | Mutagenesis | 3 | 188 | 408 | 159 |
| 137 | teratogenic agents | 3 | 188 | 201 | 42 |
| 137 | Molecular Spectroscopy | 13 | 188 | 832 | 1127 |
| 137 | carcinogens | 3 | 188 | 847 | 642 |
| 141 | Nutrition | 9 | 185 | 2149 | 2474 |
| 142 | Materials Science | 14 | 183 | 2095 | 2619 |
| 143 | pigments | 2 | 176 | 1060 | 535 |
| 144 | food technology | 7 | 175 | 1620 | 1785 |
| 145 | Mechanics | 13 | 174 | 557 | 658 |
| 146 | diffusion | 5 | 173 | 209 | 13 |
| 146 | mass transfer | 3 | 173 | 1615 | 1243 |
| 148 | natural disasters | 4 | 171 | 1082 | 893 |
| 149 | atmosphere | 3 | 166 | 727 | 546 |
| 150 | Social Sciences | 12 | 165 | 1693 | 1775 |
| 151 | Atmospheric Physics | 4 | 162 | 1169 | 1057 |
| 152 | Endocrinology | 1 | 159 | 2879 | 1797 |
| 153 | Nanochemistry | 5 | 158 | 959 | 782 |
| 154 | Sociology | 11 | 157 | 1517 | 1801 |
| 155 | Systems Analysis | 4 | 156 | 999 | 676 |
| 155 | community development | 2 | 156 | 734 | 347 |
| 157 | Molecules | 11 | 155 | 809 | 856 |
| 158 | Emergency Medical Services | 1 | 152 | 1018 | 326 |
| 158 | emergency management | 1 | 152 | 1139 | 457 |
| 160 | Urban Planning | 1 | 151 | 695 | 304 |
| 160 | Housing | 1 | 151 | 835 | 353 |
| 160 | Population | 1 | 151 | 1379 | 634 |
| 163 | Nanoparticles | 7 | 147 | 1205 | 1407 |
| 163 | commerce | 9 | 147 | 834 | 1075 |
| 165 | Semiconductors | 5 | 146 | 1700 | 1251 |
| 166 | Education | 16 | 145 | 1558 | 2023 |
| 166 | Immunology | 11 | 145 | 1411 | 2003 |
| 168 | Egypt | 7 | 143 | 234 | 369 |
| 169 | Biophysics | 5 | 142 | 3418 | 3310 |
| 170 | Renewable Energy Sources | 2 | 139 | 2805 | 2565 |
| 170 | Antibacterial agents | 3 | 139 | 582 | 523 |
| 172 | Anthropology | 20 | 137 | 520 | 905 |
| 173 | Convergence | 2 | 136 | 68 | 60 |
| 174 | miniaturization | 6 | 134 | 1202 | 1462 |
| 175 | Industrial Engineering | 10 | 133 | 930 | 1361 |
| 175 | Water quality management | 4 | 133 | 1515 | 1195 |
| 177 | Plant diseases | 3 | 128 | 1716 | 1300 |
| 178 | Logistics | 12 | 126 | 174 | 552 |
| 179 | Plant Biotechnology | 2 | 125 | 908 | 612 |
| 179 | Cancer | 3 | 125 | 2153 | 2076 |
| 181 | energy conservation | 5 | 123 | 1604 | 1965 |
| 181 | Plant genetic engineering | 1 | 123 | 1217 | 796 |
| 183 | Luminescence | 6 | 122 | 979 | 937 |
| 184 | Climatology | 8 | 120 | 994 | 1398 |
| 184 | bioclimatology | 8 | 120 | 464 | 724 |
| 186 | Solitons | 4 | 119 | 1068 | 904 |
| 186 | Fractals | 4 | 119 | 1074 | 910 |
| 186 | Chaos | 4 | 119 | 1068 | 904 |
| 189 | Water | 3 | 117 | 2150 | 2201 |
| 190 | Plant physiology | 1 | 116 | 2535 | 1841 |
| 190 | Calorimetry | 4 | 116 | 1087 | 819 |
| 190 | Host-parasite interactions | 1 | 116 | 1507 | 1121 |
| 190 | Thermal analysis | 4 | 116 | 1087 | 819 |
| 194 | Polymers | 11 | 114 | 2365 | 2920 |
| 195 | Surgery | 1 | 113 | 1590 | 1138 |
| 195 | Light | 2 | 113 | 995 | 926 |
| 197 | Medical Laboratory Science | 2 | 112 | 1990 | 1737 |
| 197 | Surface-Active Agents | 3 | 112 | 1133 | 1160 |
| 197 | Surface properties | 3 | 112 | 1183 | 1228 |
| 200 | Fisheries | 9 | 111 | 822 | 1127 |
| 201 | polymerization | 10 | 110 | 2119 | 2587 |
| 201 | Human biology | 11 | 110 | 259 | 429 |
| 203 | Microbial Ecology | 9 | 109 | 1161 | 2038 |
| 204 | Public Health | 12 | 108 | 2337 | 3342 |
| 204 | Automation | 13 | 108 | 1104 | 1855 |
| 204 | Water pollution | 4 | 108 | 2129 | 2285 |
| 204 | Carbon | 1 | 108 | 1736 | 1411 |
| 208 | Contraception | 5 | 107 | 390 | 457 |
| 209 | natural products | 4 | 105 | 1557 | 1337 |
| 209 | Agriculture | 5 | 105 | 1525 | 1604 |
| 211 | Social policy | 4 | 101 | 882 | 708 |
| 211 | Organometallic compounds | 7 | 101 | 875 | 1070 |
| 213 | Microcirculation | 2 | 100 | 543 | 404 |
| 213 | Blood vessels | 2 | 100 | 462 | 341 |
| 215 | Molecular recognition | 2 | 98 | 281 | 158 |
| 216 | Public Policy | 3 | 96 | 1602 | 1509 |
| 216 | planning | 3 | 96 | 758 | 550 |
| 216 | Economic planning | 3 | 96 | 508 | 458 |
| 219 | Evolutionary Genetics | 4 | 95 | 516 | 591 |
| 219 | Molecular Epidemiology | 4 | 95 | 516 | 591 |
| 219 | Radiation | 8 | 95 | 1293 | 1520 |
| 219 | Crystal growth | 4 | 95 | 889 | 941 |
| 223 | Immunotherapy | 3 | 94 | 1436 | 1490 |
| 223 | Immunopharmacology | 3 | 94 | 993 | 956 |
| 223 | cytokines | 3 | 94 | 1065 | 1155 |
| 226 | Japan | 9 | 92 | 934 | 1297 |
| 227 | Condensed Matter | 12 | 91 | 1625 | 2175 |
| 228 | Ichthyology | 5 | 90 | 310 | 264 |
| 228 | Fish | 5 | 90 | 236 | 231 |
| 230 | Green Chemistry | 3 | 88 | 1577 | 1844 |
| 230 | Sustainable Engineering | 3 | 88 | 1549 | 1646 |
| 230 | Astrophysics | 13 | 88 | 1609 | 2266 |
| 230 | Corporate Social Responsibility | 2 | 88 | 404 | 509 |
| 230 | environmental auditing | 2 | 88 | 424 | 511 |
| 235 | Antioxidants | 1 | 86 | 1056 | 910 |
| 235 | free radicals | 1 | 86 | 1639 | 1421 |
| 235 | vitamin C | 1 | 86 | 702 | 501 |
| 235 | vitamin E | 1 | 86 | 702 | 501 |
| 239 | Information Technology | 11 | 85 | 1212 | 2122 |
| 239 | Hydrology | 7 | 85 | 1527 | 1980 |
| 239 | data protection | 5 | 85 | 380 | 386 |
| 242 | Environmental Microbiology | 6 | 81 | 876 | 1516 |
| 242 | Palynology | 7 | 81 | 77 | 161 |
| 242 | bioluminescence | 4 | 81 | 275 | 200 |
| 245 | Insects | 7 | 80 | 924 | 1142 |
| 245 | Entomology | 10 | 80 | 1242 | 1605 |
| 247 | Geodesy | 6 | 79 | 468 | 670 |
| 248 | Wales | 3 | 78 | 90 | 31 |
| 249 | Medical Microbiology | 3 | 75 | 1691 | 1985 |
| 250 | Physical organic chemistry | 6 | 73 | 1028 | 1287 |
| 251 | Regional Planning | 1 | 70 | 2084 | 1363 |
| 251 | Microbial Biotechnology | 7 | 70 | 532 | 1151 |
| 251 | Tropical Medicine | 3 | 70 | 1565 | 1470 |
| 251 | Urban Areas | 1 | 70 | 466 | 204 |
| 255 | Mycology | 2 | 69 | 1612 | 1439 |
| 256 | Geology | 8 | 68 | 1710 | 2292 |
| 256 | Genetic engineering | 4 | 68 | 1573 | 1924 |
| 258 | Production Engineering | 4 | 66 | 1682 | 1705 |
| 258 | Molecular cloning | 3 | 66 | 1314 | 1389 |
| 258 | Genetic recombination | 3 | 66 | 1296 | 1375 |
| 258 | Recombinant DNA | 3 | 66 | 1360 | 1435 |
| 262 | Geomorphology | 4 | 65 | 1137 | 1533 |
| 262 | Ethnology | 8 | 65 | 828 | 1099 |
| 262 | finance | 4 | 65 | 2042 | 2084 |
| 265 | Genetics | 3 | 64 | 2770 | 3051 |
| 266 | complementary therapies | 4 | 63 | 1408 | 1739 |
| 266 | scientific societies | 5 | 63 | 479 | 758 |
| 268 | Thermodynamics | 2 | 61 | 1485 | 1009 |
| 268 | Food Policy | 3 | 61 | 295 | 451 |
| 268 | Nutrition physiology | 3 | 61 | 662 | 839 |
| 268 | world | 3 | 61 | 676 | 999 |
| 272 | Signal Processing | 3 | 60 | 2251 | 2354 |
| 272 | Biodegradation | 3 | 60 | 736 | 1022 |
| 274 | Genomics | 6 | 59 | 1845 | 2707 |
| 274 | Educational Technology | 3 | 59 | 1652 | 1782 |
| 274 | Business | 3 | 59 | 2148 | 2405 |
| 274 | irreversible processes | 1 | 59 | 79 | 34 |
| 274 | Nonequilibrium thermodynamics | 1 | 59 | 79 | 34 |
| 274 | Nonlinear mechanics | 3 | 59 | 450 | 494 |
| 280 | Engineering Physics | 4 | 58 | 79 | 33 |
| 280 | Computational Biology | 4 | 58 | 1918 | 2309 |
| 280 | Systems Biology | 3 | 58 | 1287 | 1531 |
| 280 | breastfeeding | 2 | 58 | 574 | 539 |
| 280 | toxicity testing | 2 | 58 | 758 | 766 |
| 280 | United States | 4 | 58 | 3665 | 3853 |
| 286 | Biomarkers | 5 | 57 | 247 | 422 |
| 286 | Entrepreneurship | 3 | 57 | 1013 | 1390 |
| 286 | biochemical markers | 5 | 57 | 409 | 664 |
| 289 | Technological Innovations | 3 | 56 | 1064 | 1281 |
| 290 | Mitochondrial DNA | 1 | 55 | 439 | 89 |
| 291 | Control Theory | 4 | 54 | 1507 | 1588 |
| 292 | Marine Biology | 12 | 53 | 1249 | 2428 |
| 293 | Fishery management | 2 | 52 | 921 | 842 |
| 293 | Hydrodynamics | 2 | 52 | 649 | 696 |
| 295 | Histocompatibility Testing | 4 | 51 | 355 | 523 |
| 296 | dietary supplements | 1 | 49 | 1412 | 1206 |
| 296 | drug toxicity | 1 | 49 | 921 | 750 |
| 296 | Vaccines | 2 | 49 | 1627 | 1673 |
| 299 | Organizational learning | 2 | 48 | 605 | 483 |
| 299 | Ocean Engineering | 3 | 48 | 1526 | 1830 |
| 299 | Knowledge management | 2 | 48 | 606 | 420 |
| 302 | Aerosols | 1 | 47 | 812 | 612 |
| 302 | Microorganisms | 1 | 47 | 1407 | 1354 |
| 302 | Chemical structure | 1 | 47 | 1019 | 471 |
| 302 | Fluorescence | 6 | 47 | 255 | 505 |
| 306 | Genetic Toxicology | 1 | 46 | 739 | 715 |
| 306 | mutation | 1 | 46 | 827 | 796 |
| 308 | Soil Science | 3 | 45 | 1737 | 2107 |
| 308 | Bioinformatics | 1 | 45 | 2527 | 2055 |
| 308 | Teaching | 2 | 45 | 2069 | 1815 |
| 311 | Latin America | 1 | 44 | 1649 | 862 |
| 312 | Quality Control | 1 | 43 | 2490 | 2135 |
| 312 | Bioremediation | 4 | 43 | 685 | 1327 |
| 312 | Quantum Optics | 4 | 43 | 777 | 942 |
| 312 | food handling | 1 | 43 | 1447 | 1398 |
| 312 | Atomic spectroscopy | 4 | 43 | 947 | 1195 |
| 312 | Laser Spectroscopy | 4 | 43 | 717 | 900 |
| 318 | Cartography | 1 | 42 | 827 | 437 |
| 318 | Drug delivery systems | 3 | 42 | 1492 | 1937 |
| 320 | Physical Chemistry | 6 | 41 | 1523 | 2199 |
| 321 | Fluid Mechanics | 2 | 40 | 1652 | 1564 |
| 321 | Animal breeding | 1 | 40 | 1097 | 903 |
| 321 | Reproduction | 1 | 40 | 2448 | 2105 |
| 321 | Breeding | 1 | 40 | 1587 | 1387 |
| 321 | Plants | 2 | 40 | 2103 | 2248 |
| 326 | Energy Storage | 2 | 39 | 1429 | 1558 |
| 326 | Economic Development | 7 | 39 | 941 | 1915 |
| 328 | plant molecular biology | 1 | 38 | 1924 | 1997 |
| 328 | Plant cells | 1 | 38 | 1292 | 1566 |
| 330 | Geochemistry | 5 | 37 | 1405 | 2180 |
| 330 | Wireless Communication Systems | 4 | 37 | 1957 | 2372 |
| 330 | Quality of life | 4 | 37 | 1162 | 1960 |
| 330 | freshwater biology | 2 | 37 | 1083 | 1190 |
| 334 | Parasitology | 5 | 36 | 1664 | 2349 |
| 334 | Developing countries | 4 | 36 | 1938 | 2629 |
| 334 | proteins | 2 | 36 | 1936 | 2123 |
| 337 | Nanomedicine | 2 | 35 | 303 | 524 |
| 337 | consumers | 1 | 35 | 738 | 636 |
| 337 | Sales Promotion | 1 | 35 | 271 | 164 |
| 340 | Anatomy | 2 | 34 | 1973 | 2037 |
| 340 | Embryology | 2 | 34 | 1374 | 1675 |
| 340 | Computer Graphics | 3 | 34 | 1649 | 1961 |
| 340 | Cosmology | 4 | 34 | 546 | 746 |
| 340 | Agricultural Microbiology | 3 | 34 | 64 | 66 |
| 340 | Developmental Biology | 2 | 34 | 1869 | 2260 |
| 340 | nuclear astrophysics | 4 | 34 | 424 | 639 |
| 340 | Cell differentiation | 2 | 34 | 1352 | 1779 |
| 340 | Diet | 1 | 34 | 2361 | 2480 |
| 340 | Growth | 2 | 34 | 1090 | 1461 |
| 350 | lasers | 5 | 33 | 1671 | 2250 |
| 351 | Pathology | 3 | 32 | 1495 | 2111 |
| 351 | Forest Management | 3 | 32 | 905 | 1345 |
| 353 | Pediatrics | 2 | 31 | 2046 | 2254 |
| 353 | Biodiversity conservation | 1 | 31 | 1950 | 2016 |
| 353 | Corporate governance | 1 | 31 | 1093 | 1053 |
| 353 | Entropy | 3 | 31 | 1216 | 1465 |
| 353 | forest policy | 2 | 31 | 419 | 557 |
| 358 | Carcinogenesis | 2 | 30 | 968 | 1337 |
| 359 | Mathematical Physics | 4 | 29 | 2376 | 2708 |
| 359 | Ecohydrology | 2 | 29 | 473 | 570 |
| 359 | Immunotoxicology | 1 | 29 | 579 | 504 |
| 359 | Parasites | 4 | 29 | 1308 | 1894 |
| 363 | soil microbiology | 2 | 28 | 1526 | 2190 |
| 363 | micromechanics | 1 | 28 | 945 | 870 |
| 363 | Porous materials | 5 | 28 | 571 | 1055 |
| 363 | Methodology | 3 | 28 | 523 | 744 |
| 363 | Climate | 1 | 28 | 1001 | 1017 |
| 363 | weather | 1 | 28 | 975 | 998 |
| 369 | Energy Conversion | 1 | 27 | 1606 | 1735 |
| 369 | Organic Chemistry | 3 | 27 | 2634 | 3182 |
| 369 | Rural Development | 4 | 27 | 425 | 848 |
| 369 | fuel cells | 1 | 27 | 1636 | 1722 |
| 373 | Flexible manufacturing systems | 1 | 26 | 783 | 841 |
| 373 | reforestation | 1 | 26 | 281 | 284 |
| 373 | Transportation | 1 | 26 | 2226 | 2077 |
| 373 | Environmental carcinogens | 1 | 26 | 52 | 90 |
| 373 | afforestation | 1 | 26 | 281 | 284 |
| 373 | bees | 2 | 26 | 478 | 565 |
| 379 | Sedimentary rocks | 1 | 25 | 907 | 936 |
| 380 | Pharmaceutical Chemistry | 5 | 24 | 2434 | 3650 |
| 380 | drug resistance | 2 | 24 | 857 | 1245 |
| 380 | Probiotics | 2 | 24 | 237 | 497 |
| 380 | Landslides | 1 | 24 | 450 | 593 |
| 380 | drug evaluation | 1 | 24 | 1710 | 1797 |
| 385 | Optical Communications | 2 | 23 | 927 | 1023 |
| 385 | water supply | 1 | 23 | 1257 | 1412 |
| 385 | Metallography | 1 | 23 | 1242 | 1252 |
| 388 | Image Processing | 4 | 22 | 1835 | 2676 |
| 388 | Plant hormones | 1 | 22 | 576 | 710 |
| 388 | labor | 2 | 22 | 426 | 464 |
| 391 | occupational diseases | 1 | 21 | 1141 | 1310 |
| 391 | Integrative Medicine | 3 | 21 | 267 | 415 |
| 391 | Holistic Health | 3 | 21 | 456 | 808 |
| 391 | Evolutionary Computation | 1 | 21 | 836 | 984 |
| 391 | Swarm Intelligence | 1 | 21 | 585 | 660 |
| 391 | Business Ethics | 1 | 21 | 1552 | 1800 |
| 391 | internet | 3 | 21 | 1546 | 2244 |
| 391 | World Wide Web | 3 | 21 | 402 | 616 |
| 399 | Psychology | 1 | 20 | 5301 | 4927 |
| 399 | Chronobiology | 4 | 20 | 383 | 841 |
| 399 | biological clocks | 4 | 20 | 383 | 841 |
| 399 | Medical Anthropology | 1 | 20 | 1690 | 1976 |
| 399 | Labor Unions | 1 | 20 | 534 | 380 |
| 399 | Supramolecular chemistry | 1 | 20 | 501 | 423 |
| 399 | monetary policy | 1 | 20 | 127 | 75 |
| 399 | circadian rhythm | 4 | 20 | 383 | 841 |
| 399 | biological rhythms | 4 | 20 | 353 | 822 |
| 399 | primary prevention | 1 | 20 | 666 | 823 |
| 399 | working class | 1 | 20 | 332 | 337 |
| 399 | cycles | 4 | 20 | 112 | 227 |
| 411 | Statistics | 2 | 19 | 2566 | 2548 |
| 411 | Electronics | 8 | 19 | 2029 | 3368 |
| 411 | Digital electronics | 1 | 19 | 601 | 431 |
| 411 | Biogeochemistry | 1 | 19 | 1446 | 1729 |
| 411 | food contamination | 1 | 19 | 1657 | 1643 |
| 411 | Water Microbiology | 1 | 19 | 855 | 1005 |
| 411 | Pesticides | 1 | 19 | 1113 | 1195 |
| 411 | Fouling | 1 | 19 | 448 | 606 |
| 419 | Graph Theory | 2 | 18 | 914 | 858 |
| 419 | Wildlife conservation | 1 | 18 | 1460 | 1684 |
| 419 | Biotransformation | 1 | 18 | 280 | 286 |
| 419 | Fiber Optics | 2 | 18 | 1038 | 1313 |
| 419 | ovary | 1 | 18 | 381 | 492 |
| 419 | Combinatorial analysis | 2 | 18 | 1187 | 1105 |
| 419 | enzymes | 1 | 18 | 1943 | 2184 |
| 426 | Cryptography | 4 | 17 | 564 | 852 |
| 426 | Ceramic materials | 1 | 17 | 1905 | 2002 |
| 426 | Ferroelectricity | 4 | 17 | 869 | 1249 |
| 426 | Parasitic Diseases | 2 | 17 | 1904 | 2462 |
| 426 | Microstructure | 2 | 17 | 1157 | 1416 |
| 431 | Physical Geography | 2 | 16 | 627 | 921 |
| 431 | Health Policy | 3 | 16 | 1805 | 2710 |
| 431 | Pacific Islands | 1 | 16 | 592 | 549 |
| 431 | Germany | 3 | 16 | 607 | 741 |
| 431 | herbs | 4 | 16 | 30 | 170 |
| 431 | United Kingdom | 3 | 16 | 1253 | 2009 |
| 437 | Integrated Optics | 1 | 15 | 166 | 98 |
| 437 | Waste management | 2 | 15 | 1646 | 2200 |
| 437 | Water Purification | 2 | 15 | 1362 | 1875 |
| 437 | Soviet Union | 3 | 15 | 689 | 949 |
| 437 | biomedicine | 1 | 15 | 871 | 1133 |
| 437 | Informatics | 1 | 15 | 1262 | 1453 |
| 443 | Distance Education | 1 | 14 | 714 | 913 |
| 443 | Stochastic Processes | 2 | 14 | 1130 | 1458 |
| 445 | Humanities | 4 | 13 | 1646 | 2741 |
| 445 | Dietetics | 1 | 13 | 817 | 910 |
| 445 | Demography | 1 | 13 | 1003 | 1140 |
| 445 | Geopolitics | 1 | 13 | 499 | 583 |
| 445 | Quality Assurance | 3 | 13 | 318 | 820 |
| 445 | Malaria | 1 | 13 | 945 | 1188 |
| 451 | Occupational Therapy | 1 | 12 | 1543 | 1384 |
| 451 | Occupational Health | 1 | 12 | 1605 | 1618 |
| 451 | Industrial Safety | 1 | 12 | 1832 | 1979 |
| 451 | ethnicity | 5 | 12 | 507 | 1107 |
| 451 | industrial hygiene | 1 | 12 | 1618 | 1536 |
| 451 | infection | 1 | 12 | 1833 | 2187 |
| 451 | healthcare industry | 1 | 12 | 105 | 173 |
| 451 | pharmaceutical industry | 1 | 12 | 968 | 1187 |
| 451 | Immunity | 1 | 12 | 1881 | 2309 |
| 460 | Oceanography | 4 | 11 | 1292 | 2354 |
| 460 | Coastal Engineering | 2 | 11 | 148 | 263 |
| 460 | Hydraulic Engineering | 2 | 11 | 965 | 1392 |
| 460 | air quality management | 1 | 11 | 947 | 1340 |
| 460 | Smart Materials | 1 | 11 | 1485 | 1663 |
| 460 | Composite Materials | 1 | 11 | 3023 | 3477 |
| 460 | Chromosome mapping | 1 | 11 | 2190 | 2715 |
| 460 | Emulsions | 1 | 11 | 723 | 853 |
| 460 | Interactive multimedia | 1 | 11 | 948 | 1208 |
| 460 | gene mapping | 1 | 11 | 2328 | 2883 |
| 470 | Law | 1 | 10 | 1835 | 1426 |
| 470 | Software Engineering | 2 | 10 | 1168 | 1606 |
| 470 | Telecommunication Systems | 3 | 10 | 1617 | 2406 |
| 470 | Crime prevention | 1 | 10 | 459 | 511 |
| 470 | Mass Spectrometry | 1 | 10 | 1469 | 1708 |
| 470 | Electromagnetic waves | 2 | 10 | 399 | 674 |
| 470 | Agricultural systems | 2 | 10 | 365 | 862 |
| 477 | Mechanical Engineering | 2 | 9 | 2557 | 3121 |
| 477 | Environmental Chemistry | 1 | 9 | 2825 | 3402 |
| 477 | Ethnic relations | 3 | 9 | 596 | 1057 |
| 477 | Integrated Circuits | 1 | 9 | 1238 | 1174 |
| 477 | Environmental risk assessment | 1 | 9 | 749 | 1019 |
| 477 | Marine resources | 1 | 9 | 1104 | 1506 |
| 477 | machinery | 2 | 9 | 1006 | 1499 |
| 477 | Investments | 1 | 9 | 1011 | 1288 |
| 485 | Neurology | 1 | 8 | 4374 | 4954 |
| 485 | Oncology | 2 | 8 | 1938 | 3086 |
| 485 | Physiology | 2 | 8 | 3567 | 4830 |
| 485 | Epidemiology | 1 | 8 | 3802 | 4406 |
| 485 | Mass Communication | 3 | 8 | 10 | 22 |
| 485 | Medical Oncology | 2 | 8 | 1440 | 2228 |
| 485 | Tourism | 1 | 8 | 2394 | 3005 |
| 485 | Mass Media | 3 | 8 | 844 | 1240 |
| 485 | Interfaces | 1 | 8 | 651 | 863 |
| 485 | Chemical analysis | 1 | 8 | 1533 | 1982 |
| 485 | Communication research | 3 | 8 | 10 | 22 |
| 485 | biological agents | 2 | 8 | 899 | 1094 |
| 485 | synthesis | 2 | 8 | 1332 | 1853 |
| 498 | Global Health | 1 | 7 | 1665 | 2123 |
| 498 | Optoelectronics | 1 | 7 | 907 | 988 |
| 498 | Public Administration | 2 | 7 | 1554 | 2220 |
| 498 | Photonics | 1 | 7 | 2241 | 2703 |
| 498 | economic indicators | 3 | 7 | 86 | 325 |
| 498 | Biological Systems | 1 | 7 | 953 | 1329 |
| 498 | Southeast Asia | 3 | 7 | 365 | 869 |
| 498 | heredity | 1 | 7 | 995 | 1280 |
| 498 | drug development | 1 | 7 | 1284 | 1804 |
| 498 | Pathogens | 1 | 7 | 244 | 478 |
| 498 | Evolution | 1 | 7 | 2297 | 2822 |
| 509 | Radiation Protection | 1 | 6 | 989 | 1098 |
| 509 | radiation monitoring | 1 | 6 | 896 | 1029 |
| 509 | preventive medicine | 1 | 6 | 1533 | 2040 |
| 509 | Measurement | 1 | 6 | 2028 | 2522 |
| 509 | Computational Fluid Dynamics | 1 | 6 | 1009 | 1374 |
| 509 | Phylogenetics | 1 | 6 | 217 | 361 |
| 509 | Obesity | 1 | 6 | 2157 | 2878 |
| 509 | Hormones | 1 | 6 | 1537 | 2040 |
| 509 | Transport | 1 | 6 | 922 | 1316 |
| 509 | Sea | 1 | 6 | 825 | 1186 |
| 509 | optical pattern recognition | 1 | 6 | 295 | 379 |
| 509 | Fishery resources | 1 | 6 | 906 | 1278 |
| 509 | Telecommunication | 1 | 6 | 3238 | 3680 |
| 509 | Radiation dosimetry | 1 | 6 | 754 | 874 |
| 509 | antibiotics | 1 | 6 | 425 | 738 |
| 509 | Quantum theory | 2 | 6 | 1148 | 1614 |
| 509 | rivers | 1 | 6 | 506 | 811 |
| 509 | Textile industry | 1 | 6 | 831 | 1017 |
| 527 | Information Theory | 1 | 5 | 1869 | 2223 |
| 527 | Archaeology | 1 | 5 | 1739 | 1944 |
| 527 | Political Science | 3 | 5 | 1610 | 2387 |
| 527 | Ceramics | 1 | 5 | 2003 | 2333 |
| 527 | Fluid Dynamics | 1 | 5 | 1543 | 1917 |
| 527 | vibration | 1 | 5 | 1630 | 2063 |
| 527 | Noise | 1 | 5 | 310 | 447 |
| 527 | Erosion | 1 | 5 | 241 | 557 |
| 527 | Sound | 1 | 5 | 1541 | 1788 |
| 527 | Glass | 1 | 5 | 1451 | 1887 |
| 527 | pottery | 1 | 5 | 1378 | 1821 |
| 527 | communities | 1 | 5 | 27 | 48 |
| 527 | Youth | 1 | 5 | 1077 | 1548 |
| 527 | Europe | 1 | 5 | 3651 | 4103 |
| 541 | Macroeconomics | 1 | 4 | 654 | 836 |
| 541 | Agricultural Chemistry | 1 | 4 | 2717 | 3414 |
| 541 | Social welfare | 4 | 4 | 470 | 1334 |
| 541 | Political Ethics | 1 | 4 | 222 | 321 |
| 541 | Ergodic Theory | 1 | 4 | 32 | 63 |
| 541 | Soft Condensed Matter | 1 | 4 | 1478 | 1922 |
| 541 | Yugoslavia | 1 | 4 | 185 | 168 |
| 541 | Carbohydrates | 1 | 4 | 673 | 1000 |
| 541 | Adipose tissue | 1 | 4 | 163 | 353 |
| 541 | viruses | 1 | 4 | 1546 | 2152 |
| 541 | Social work | 3 | 4 | 1291 | 2503 |
| 541 | Microscopy | 3 | 4 | 1354 | 2498 |
| 541 | Development | 1 | 4 | 1230 | 1743 |
| 541 | biopolymers | 1 | 4 | 1613 | 2092 |
| 541 | Economic Assistance | 1 | 4 | 1121 | 1626 |
| 541 | civil service | 1 | 4 | 616 | 878 |
| 557 | Radiology | 1 | 3 | 1664 | 2144 |
| 557 | Geriatrics | 2 | 3 | 2656 | 3866 |
| 557 | Public Relations | 1 | 3 | 807 | 1249 |
| 557 | Political Sociology | 1 | 3 | 797 | 1045 |
| 557 | Heterocyclic chemistry | 2 | 3 | 736 | 1414 |
| 557 | cosmic rays | 1 | 3 | 682 | 996 |
| 557 | Nationalism | 1 | 3 | 621 | 854 |
| 557 | Biofeedback | 1 | 3 | 240 | 543 |
| 557 | health and race | 2 | 3 | 240 | 638 |
| 557 | elder abuse | 1 | 3 | 542 | 945 |
| 557 | social justice | 1 | 3 | 711 | 946 |
| 557 | risk factors | 1 | 3 | 904 | 1210 |
| 557 | Gerontology | 2 | 3 | 2020 | 2964 |
| 557 | Asymmetric synthesis | 2 | 3 | 135 | 537 |
| 557 | Cardiovascular diseases | 1 | 3 | 1779 | 2269 |
| 557 | ethnic groups | 2 | 3 | 435 | 978 |
| 557 | Reservoirs | 1 | 3 | 343 | 601 |
| 557 | lakes | 1 | 3 | 172 | 360 |
| 557 | behavior therapy | 1 | 3 | 1135 | 1582 |
| 557 | Group Identity | 1 | 3 | 203 | 364 |
| 557 | Culture | 1 | 3 | 1695 | 2055 |
| 557 | Aging | 2 | 3 | 2469 | 3688 |
| 557 | Psychophysiology | 1 | 3 | 3016 | 3815 |
| 580 | Civil Engineering | 2 | 2 | 1727 | 2631 |
| 580 | Astronomy | 1 | 2 | 2839 | 3421 |
| 580 | Visual Communication | 1 | 2 | 836 | 1250 |
| 580 | Telecommunications | 1 | 2 | 1402 | 1963 |
| 580 | Microbial Genetics | 1 | 2 | 613 | 1022 |
| 580 | Human Rights | 1 | 2 | 984 | 1451 |
| 580 | Photogrammetry | 2 | 2 | 1037 | 1616 |
| 580 | Thermochemistry | 1 | 2 | 768 | 1142 |
| 580 | civil rights | 1 | 2 | 709 | 1086 |
| 580 | Marine biodiversity | 2 | 2 | 265 | 642 |
| 580 | Image enhancement | 1 | 2 | 675 | 1096 |
| 580 | environmental remediation | 2 | 2 | 480 | 1300 |
| 580 | Communication | 1 | 2 | 2923 | 3717 |
| 580 | industrial relations | 1 | 2 | 1314 | 1851 |
| 580 | Microwaves | 1 | 2 | 1708 | 2099 |
| 580 | Vegetation | 1 | 2 | 229 | 471 |
| 580 | food industry | 1 | 2 | 1394 | 2089 |
| 580 | Exercise | 1 | 2 | 2189 | 2742 |
| 580 | Aquatic ecology | 1 | 2 | 1356 | 1895 |
| 580 | Muscle contraction | 1 | 2 | 693 | 960 |
| 580 | Genes | 1 | 2 | 1549 | 2219 |
| 601 | Electrical Engineering | 2 | 1 | 3181 | 4421 |
| 601 | Geometry | 1 | 1 | 1660 | 1999 |
| 601 | School Psychology | 1 | 1 | 723 | 1228 |
| 601 | Microelectronics | 1 | 1 | 2142 | 2757 |
| 601 | Stochastic Differential Equations | 1 | 1 | 67 | 111 |
| 601 | Adhesion | 1 | 1 | 1180 | 1718 |
| 601 | Gene expression regulation | 1 | 1 | 1323 | 1931 |
| 601 | Genetic regulation | 1 | 1 | 1397 | 1975 |
| 601 | Turbulence | 1 | 1 | 399 | 647 |
| 601 | Non-timber forest products | 1 | 1 | 58 | 34 |
| 601 | protein | 1 | 1 | 1567 | 2218 |
| 601 | Groundwater | 1 | 1 | 840 | 1400 |
| 601 | adhesives | 1 | 1 | 1246 | 1780 |
| 601 | California | 1 | 1 | 585 | 894 |
| 601 | women | 1 | 1 | 1472 | 2065 |
| 601 | Insect biochemistry | 1 | 1 | 709 | 1109 |
| 617 | Mathematics Education | 1 | 0 | 840 | 1278 |
| 617 | Clinical Biochemistry | 1 | 0 | 1499 | 2144 |
| 617 | poverty | 1 | 0 | 778 | 1453 |
| 617 | Reproductive health | 1 | 0 | 1174 | 1854 |
| 617 | Diagnostic Imaging | 1 | 0 | 2273 | 3173 |
| 617 | Drug design | 1 | 0 | 2138 | 3004 |
| 617 | Electrochemistry | 2 | 0 | 3392 | 4545 |
| 617 | Postcolonialism | 1 | 0 | 267 | 525 |
| 617 | Semigroups | 1 | 0 | 549 | 862 |
| 617 | older people | 1 | 0 | 2109 | 2784 |
| 617 | Library Science | 1 | 0 | 1585 | 2331 |
| 617 | libraries | 1 | 0 | 966 | 1349 |
| 617 | Imaging systems | 1 | 0 | 1397 | 2110 |
| 617 | RNA | 1 | 0 | 747 | 1137 |