| 1 | Chemistry | 193 | 5.4K | 1703 | 2131 |
| 2 | Mathematics | 397 | 4.0K | 484 | 597 |
| 3 | Materials | 74 | 3.6K | 1696 | 1373 |
| 4 | Biochemistry | 110 | 3.1K | 2350 | 2601 |
| 5 | Catalysis | 61 | 2.7K | 1045 | 997 |
| 6 | Nanotechnology | 80 | 2.7K | 1192 | 1371 |
| 7 | Physics | 150 | 2.6K | 2031 | 4013 |
| 8 | Analytical Chemistry | 80 | 1.9K | 985 | 1165 |
| 9 | Optical materials | 36 | 1.9K | 824 | 678 |
| 10 | Biotechnology | 31 | 1.8K | 2626 | 2180 |
| 11 | Biomedical Engineering | 59 | 1.7K | 1172 | 1239 |
| 12 | Biology | 39 | 1.6K | 4206 | 4826 |
| 13 | Neural circuitry | 51 | 1.5K | 245 | 364 |
| 14 | Cytology | 4 | 1.4K | 4752 | 2165 |
| 15 | Nanostructured Materials | 48 | 1.4K | 952 | 1049 |
| 16 | Science | 69 | 1.3K | 3323 | 5624 |
| 17 | China | 61 | 1.3K | 500 | 441 |
| 18 | Bioengineering | 23 | 1.3K | 1968 | 1797 |
| 19 | Physiology | 41 | 1.3K | 1509 | 1574 |
| 20 | Materials Science | 34 | 1.3K | 1874 | 1694 |
| 21 | Environmental Management | 28 | 1.3K | 903 | 898 |
| 22 | Ecology | 34 | 1.3K | 2512 | 2845 |
| 23 | Oxidative stress | 1 | 1.3K | 2308 | 238 |
| 23 | Cell survival | 1 | 1.3K | 559 | 10 |
| 23 | molecular chaperones | 1 | 1.3K | 630 | 10 |
| 26 | Biocompatible Materials | 25 | 1.2K | 1668 | 1685 |
| 27 | Chemical Engineering | 37 | 1.2K | 1709 | 1832 |
| 28 | Electronics | 17 | 1.2K | 1930 | 833 |
| 29 | Molecular Biology | 43 | 1.1K | 3291 | 4050 |
| 30 | Pharmaceutical Chemistry | 40 | 1.1K | 1332 | 1600 |
| 31 | Medicine | 53 | 1.0K | 3867 | 5325 |
| 32 | Artificial Intelligence | 65 | 1.0K | 703 | 1046 |
| 33 | Comparative Physiology | 27 | 1.0K | 197 | 164 |
| 34 | Colloids | 30 | 1.0K | 1457 | 1527 |
| 35 | Biochemical Engineering | 27 | 982 | 1219 | 1850 |
| 36 | Nervous system | 14 | 960 | 1448 | 1186 |
| 37 | Surface Chemistry | 31 | 955 | 1515 | 1503 |
| 38 | Pollution | 21 | 948 | 2748 | 2699 |
| 39 | mathematical analysis | 116 | 945 | 249 | 462 |
| 40 | Research | 43 | 890 | 3501 | 4361 |
| 41 | Geomorphology | 20 | 864 | 507 | 487 |
| 42 | System analysis | 41 | 862 | 526 | 582 |
| 43 | Pharmacology | 13 | 828 | 3697 | 2640 |
| 44 | Biosensors | 9 | 819 | 783 | 562 |
| 44 | Bioelectronics | 9 | 819 | 633 | 502 |
| 46 | Ultrasonics | 14 | 812 | 405 | 268 |
| 46 | Sonochemistry | 14 | 812 | 154 | 146 |
| 48 | Systems Engineering | 37 | 778 | 410 | 420 |
| 49 | proteins | 21 | 741 | 920 | 841 |
| 50 | Drug design | 21 | 717 | 543 | 570 |
| 50 | peptides | 20 | 717 | 205 | 86 |
| 52 | Solid State Physics | 53 | 707 | 1330 | 1683 |
| 53 | health planning | 33 | 704 | 504 | 506 |
| 54 | Numerical Analysis | 34 | 699 | 675 | 594 |
| 55 | Engineering Mathematics | 87 | 693 | 227 | 493 |
| 56 | Photonics | 22 | 687 | 678 | 873 |
| 57 | Environment | 14 | 662 | 3053 | 3479 |
| 58 | actuators | 17 | 660 | 986 | 947 |
| 58 | transducers | 17 | 660 | 986 | 947 |
| 60 | Parasitology | 34 | 652 | 739 | 906 |
| 61 | Drug delivery systems | 6 | 650 | 1249 | 684 |
| 62 | Environmental Policy | 11 | 645 | 1983 | 1756 |
| 63 | Drug targeting | 5 | 626 | 188 | 50 |
| 63 | drug evaluation | 5 | 626 | 1288 | 328 |
| 65 | energy conservation | 9 | 605 | 1195 | 895 |
| 66 | Magnetic Materials | 21 | 592 | 529 | 542 |
| 67 | Environmental Health | 18 | 587 | 2910 | 3164 |
| 68 | Energy Policy | 14 | 572 | 1340 | 1482 |
| 69 | Fractals | 16 | 556 | 402 | 305 |
| 70 | Solitons | 12 | 549 | 442 | 259 |
| 70 | Chaos | 12 | 549 | 442 | 259 |
| 72 | Statistical physics | 35 | 545 | 1472 | 1675 |
| 73 | Operations Research | 57 | 523 | 407 | 934 |
| 74 | Solid State Chemistry | 33 | 512 | 848 | 1036 |
| 75 | nanoscience | 20 | 507 | 1335 | 1760 |
| 76 | Meteorology | 8 | 502 | 1845 | 1518 |
| 76 | Earth Sciences | 12 | 502 | 2062 | 1634 |
| 78 | Parasitic Diseases | 18 | 498 | 969 | 1117 |
| 79 | Environmental Geology | 19 | 472 | 493 | 634 |
| 80 | Biophysics | 17 | 462 | 3622 | 3611 |
| 81 | Microbiology | 21 | 460 | 3673 | 4817 |
| 82 | environmental indicators | 14 | 453 | 411 | 528 |
| 83 | Geography | 14 | 450 | 1236 | 1066 |
| 83 | Automation | 24 | 450 | 604 | 824 |
| 83 | Parasites | 17 | 450 | 674 | 669 |
| 86 | Agricultural Chemistry | 6 | 444 | 2079 | 1253 |
| 87 | Electrochemistry | 13 | 439 | 2464 | 1991 |
| 87 | atmosphere | 3 | 439 | 986 | 325 |
| 89 | miniaturization | 4 | 438 | 1933 | 1274 |
| 90 | Green Chemistry | 10 | 429 | 1071 | 1157 |
| 91 | Signal Processing | 23 | 412 | 638 | 743 |
| 92 | environmental protection | 21 | 404 | 1433 | 2113 |
| 93 | Engineering Geology | 3 | 391 | 1618 | 729 |
| 94 | environmental pollution | 12 | 388 | 2914 | 3175 |
| 95 | Genomics | 18 | 386 | 1685 | 2313 |
| 96 | Tropical Medicine | 8 | 379 | 1424 | 790 |
| 97 | Multimedia Systems | 19 | 378 | 532 | 448 |
| 98 | Toxicology | 13 | 374 | 3166 | 3353 |
| 99 | Hydrology | 19 | 368 | 1158 | 1389 |
| 100 | fuel cells | 7 | 367 | 956 | 910 |
| 101 | Condensed Matter | 33 | 360 | 1539 | 2027 |
| 102 | lasers | 14 | 346 | 916 | 686 |
| 103 | Invertebrates | 18 | 344 | 163 | 245 |
| 104 | Cognitive Science | 9 | 339 | 903 | 927 |
| 105 | Renewable Energy Sources | 7 | 338 | 2046 | 2316 |
| 106 | energy resources | 6 | 335 | 1065 | 1201 |
| 107 | disease vectors | 11 | 317 | 507 | 527 |
| 108 | Nutrition | 11 | 313 | 3126 | 3297 |
| 109 | Chromosome mapping | 9 | 312 | 1322 | 1479 |
| 109 | gene mapping | 9 | 312 | 1461 | 1751 |
| 111 | Insects | 28 | 310 | 435 | 725 |
| 112 | Soil Science | 14 | 307 | 924 | 1216 |
| 113 | Nuclear Physics | 29 | 304 | 2113 | 2660 |
| 114 | Entomology | 30 | 300 | 816 | 1165 |
| 115 | Botany | 19 | 298 | 2113 | 2931 |
| 116 | Psychology | 24 | 295 | 2228 | 3318 |
| 117 | Differential Equations | 12 | 291 | 490 | 382 |
| 117 | Nanoparticles | 18 | 291 | 769 | 1277 |
| 119 | Information Science | 12 | 287 | 1356 | 1549 |
| 120 | Ethnology | 2 | 286 | 2281 | 563 |
| 121 | Genetics | 15 | 283 | 2492 | 3800 |
| 122 | Technology | 14 | 280 | 2474 | 2589 |
| 123 | Food | 12 | 274 | 1927 | 2295 |
| 124 | Environmental monitoring | 8 | 273 | 3000 | 3256 |
| 125 | Aquaculture | 8 | 271 | 1065 | 901 |
| 126 | Combinatorial chemistry | 1 | 265 | 1827 | 668 |
| 127 | Composite Materials | 10 | 263 | 1778 | 2112 |
| 128 | Image Processing | 18 | 261 | 815 | 1332 |
| 129 | Sustainable Engineering | 7 | 258 | 1195 | 1224 |
| 130 | Nonlinear functional analysis | 16 | 255 | 441 | 530 |
| 131 | Mathematical Physics | 45 | 254 | 869 | 1630 |
| 131 | Plant physiology | 11 | 254 | 1318 | 1822 |
| 133 | Environmental Engineering | 1 | 242 | 6929 | 3131 |
| 133 | sanitation | 1 | 242 | 2894 | 1765 |
| 135 | Molecular Genetics | 11 | 240 | 1346 | 1802 |
| 136 | Nonlinear Dynamics | 9 | 238 | 1586 | 1473 |
| 137 | Environmental Microbiology | 10 | 236 | 822 | 1416 |
| 138 | Control Theory | 17 | 235 | 750 | 876 |
| 139 | biological evolution | 13 | 223 | 1188 | 2091 |
| 140 | Environmental Toxicology | 6 | 221 | 2123 | 2277 |
| 140 | pollutants | 6 | 221 | 1618 | 1653 |
| 140 | Environmental pollutants | 6 | 221 | 1982 | 1895 |
| 140 | environmental exposure | 6 | 221 | 1627 | 1526 |
| 144 | Engineering | 20 | 220 | 2036 | 2615 |
| 145 | Psychophysiology | 13 | 217 | 1830 | 2650 |
| 146 | Combinatorial optimization | 24 | 215 | 49 | 94 |
| 147 | Optics | 25 | 206 | 2258 | 2880 |
| 148 | Sustainable Development | 16 | 199 | 799 | 1726 |
| 149 | Organometallic chemistry | 19 | 198 | 773 | 1177 |
| 149 | Bioinformatics | 7 | 198 | 1745 | 1926 |
| 151 | Energy Conversion | 4 | 192 | 1212 | 1374 |
| 152 | natural disasters | 7 | 187 | 891 | 999 |
| 153 | Molecular evolution | 11 | 186 | 1033 | 1652 |
| 154 | Land use | 8 | 185 | 721 | 936 |
| 155 | Electromagnetism | 6 | 181 | 572 | 370 |
| 155 | food contamination | 13 | 181 | 408 | 605 |
| 157 | soil microbiology | 5 | 178 | 1336 | 1767 |
| 158 | pigments | 14 | 176 | 295 | 571 |
| 159 | Computer Vision | 8 | 173 | 764 | 1149 |
| 159 | Plant diseases | 12 | 173 | 1174 | 1501 |
| 159 | Phylogeny | 10 | 173 | 498 | 950 |
| 162 | Surface-Active Agents | 6 | 169 | 810 | 1066 |
| 162 | Surface properties | 6 | 169 | 879 | 1168 |
| 164 | Protozoa | 12 | 164 | 158 | 358 |
| 165 | Environmental Chemistry | 4 | 163 | 2315 | 2313 |
| 166 | Computational Biology | 16 | 162 | 1455 | 2767 |
| 167 | Nanostructures | 7 | 161 | 1752 | 2116 |
| 168 | Psychiatry | 7 | 160 | 3907 | 4396 |
| 168 | multimedia | 3 | 160 | 213 | 132 |
| 168 | Interactive multimedia | 3 | 160 | 344 | 172 |
| 171 | Microelectronics | 2 | 159 | 2527 | 1772 |
| 172 | Cybernetics | 10 | 154 | 754 | 1045 |
| 172 | Enzyme inhibitors | 5 | 154 | 273 | 230 |
| 174 | Semiconductors | 11 | 153 | 1260 | 1423 |
| 175 | Metallic Glasses | 8 | 151 | 250 | 362 |
| 176 | Robotics | 7 | 150 | 1250 | 1324 |
| 177 | Natural resources | 12 | 149 | 342 | 752 |
| 178 | Tourism | 5 | 145 | 1370 | 1484 |
| 178 | Brain | 3 | 145 | 3259 | 2839 |
| 180 | Functional Analysis | 15 | 143 | 609 | 848 |
| 181 | Animal Behavior | 11 | 142 | 1183 | 2181 |
| 181 | Evolution | 5 | 142 | 1844 | 2091 |
| 183 | Organic Chemistry | 13 | 140 | 2071 | 2972 |
| 183 | computer networks | 20 | 140 | 942 | 1881 |
| 185 | Information Technology | 15 | 139 | 1122 | 1784 |
| 186 | Immunology | 9 | 138 | 3087 | 4301 |
| 187 | Marine Biology | 11 | 135 | 1702 | 2521 |
| 187 | Microbial Ecology | 3 | 135 | 2801 | 3029 |
| 187 | Food additives | 6 | 135 | 949 | 1315 |
| 190 | Nanochemistry | 11 | 132 | 519 | 949 |
| 190 | Bioorganic chemistry | 11 | 132 | 1894 | 2953 |
| 192 | Asia | 13 | 130 | 1431 | 1925 |
| 193 | Plants | 11 | 125 | 1316 | 2295 |
| 194 | Alternative Medicine | 3 | 124 | 2322 | 1791 |
| 194 | complementary therapies | 3 | 124 | 2539 | 1864 |
| 196 | Algorithms | 19 | 123 | 152 | 487 |
| 197 | Economic History | 7 | 120 | 2984 | 2528 |
| 197 | Manufacturing Processes | 4 | 120 | 2391 | 2108 |
| 197 | management | 5 | 120 | 3184 | 3204 |
| 200 | Cognitive neuroscience | 4 | 119 | 994 | 1187 |
| 200 | economic policy | 6 | 119 | 2149 | 1696 |
| 202 | Economics | 9 | 117 | 3135 | 3249 |
| 202 | Neurobiology | 2 | 117 | 2633 | 2407 |
| 204 | Geometry | 17 | 116 | 530 | 625 |
| 205 | Egypt | 3 | 115 | 552 | 475 |
| 206 | Applied Mathematics | 43 | 114 | 69 | 256 |
| 207 | Attention | 1 | 113 | 3889 | 2171 |
| 208 | Calculus of Variations | 6 | 112 | 374 | 320 |
| 208 | Aquatic animals | 9 | 112 | 72 | 141 |
| 210 | Mountains | 14 | 111 | 93 | 207 |
| 211 | Mental Disorders | 4 | 110 | 3517 | 3759 |
| 212 | Freshwater Ecology | 8 | 109 | 106 | 117 |
| 212 | Immunochemistry | 8 | 109 | 696 | 1084 |
| 212 | Malaria | 3 | 109 | 936 | 834 |
| 212 | Crystal growth | 5 | 109 | 924 | 1068 |
| 212 | immunoassay | 8 | 109 | 67 | 81 |
| 217 | Mineral resources | 5 | 107 | 413 | 654 |
| 218 | Developmental Immunology | 2 | 105 | 1253 | 964 |
| 219 | economic analysis | 5 | 103 | 164 | 185 |
| 219 | Australia | 5 | 103 | 1859 | 1755 |
| 221 | hazard mitigation | 5 | 102 | 751 | 1000 |
| 222 | Interfaces | 1 | 101 | 732 | 257 |
| 223 | Mycology | 6 | 99 | 1458 | 1879 |
| 224 | Fuzzy systems | 23 | 98 | 402 | 1223 |
| 225 | Japan | 6 | 97 | 1852 | 1802 |
| 225 | Cancer | 3 | 97 | 4609 | 4787 |
| 227 | Energy Storage | 5 | 94 | 1124 | 1382 |
| 227 | Molecular ecology | 3 | 94 | 1326 | 1817 |
| 227 | Chemical analysis | 3 | 94 | 1491 | 1414 |
| 230 | Optoelectronics | 2 | 93 | 839 | 311 |
| 230 | Analytical Biochemistry | 7 | 93 | 1399 | 2078 |
| 232 | Transportation | 3 | 92 | 1937 | 1717 |
| 233 | Dynamics | 14 | 91 | 885 | 1462 |
| 233 | Neuroplasticity | 1 | 91 | 876 | 437 |
| 233 | human development | 1 | 91 | 1456 | 980 |
| 236 | Water | 5 | 89 | 2341 | 3493 |
| 236 | optical devices | 3 | 89 | 588 | 436 |
| 238 | Developmental Biology | 3 | 88 | 2595 | 3031 |
| 238 | plant molecular biology | 5 | 88 | 1374 | 2300 |
| 240 | Neurology | 8 | 85 | 4548 | 6734 |
| 240 | soil conservation | 7 | 85 | 491 | 973 |
| 240 | Plant tissue culture | 3 | 85 | 850 | 923 |
| 240 | Plant cell culture | 3 | 85 | 762 | 909 |
| 244 | Technological Innovations | 3 | 84 | 1206 | 1177 |
| 244 | land degradation | 6 | 84 | 308 | 671 |
| 244 | Nonlinear systems | 2 | 84 | 842 | 528 |
| 244 | degradation | 6 | 84 | 308 | 671 |
| 248 | Proteomics | 3 | 83 | 1480 | 1793 |
| 248 | genome | 3 | 83 | 2124 | 2762 |
| 250 | Simulation Methods | 2 | 82 | 1479 | 954 |
| 250 | Fixed Point Theory | 14 | 82 | 71 | 137 |
| 252 | Mobile Computing | 8 | 81 | 670 | 951 |
| 252 | Intelligent Transportation Systems | 4 | 81 | 710 | 794 |
| 252 | Mobile Commerce | 8 | 81 | 101 | 104 |
| 255 | Educational Technology | 8 | 80 | 990 | 1581 |
| 255 | Fishery management | 3 | 80 | 1066 | 925 |
| 255 | free radicals | 1 | 80 | 2758 | 2304 |
| 258 | infrared radiation | 5 | 79 | 500 | 505 |
| 258 | Cell death | 1 | 79 | 2231 | 2043 |
| 260 | Medical Laboratory Science | 2 | 78 | 3180 | 3025 |
| 260 | Industrial Microbiology | 2 | 78 | 2844 | 2893 |
| 260 | Water pollution | 2 | 78 | 3779 | 3697 |
| 260 | Animal ecology | 5 | 78 | 1091 | 1425 |
| 264 | Evolutionary Genetics | 4 | 77 | 679 | 949 |
| 264 | Molecular Epidemiology | 4 | 77 | 679 | 949 |
| 266 | Computational Intelligence | 14 | 76 | 259 | 831 |
| 267 | Oncology | 1 | 75 | 4401 | 3853 |
| 267 | Cognition | 5 | 75 | 1591 | 2148 |
| 269 | Education | 1 | 72 | 7322 | 3512 |
| 269 | Special Education | 5 | 72 | 685 | 722 |
| 271 | Food service management | 3 | 70 | 406 | 708 |
| 272 | hydrocolloids | 2 | 68 | 866 | 1161 |
| 273 | Population Genetics | 2 | 67 | 1778 | 2025 |
| 274 | Organometallic compounds | 5 | 66 | 1112 | 1466 |
| 275 | Genes | 3 | 65 | 1453 | 1682 |
| 276 | body temperature | 3 | 64 | 534 | 623 |
| 277 | Luminescence | 7 | 62 | 974 | 1503 |
| 277 | Imaging systems | 7 | 62 | 436 | 694 |
| 279 | Climatology | 4 | 61 | 1879 | 2526 |
| 279 | Heritage Tourism | 1 | 61 | 304 | 129 |
| 279 | cultural tourism | 1 | 61 | 295 | 129 |
| 279 | Biodiversity | 6 | 61 | 2007 | 3188 |
| 283 | Genetic engineering | 3 | 60 | 2806 | 3510 |
| 283 | Molecular cloning | 3 | 60 | 1880 | 2214 |
| 283 | Genetic recombination | 3 | 60 | 1851 | 2178 |
| 283 | behavior therapy | 4 | 60 | 855 | 1241 |
| 283 | Recombinant DNA | 3 | 60 | 1983 | 2311 |
| 283 | Molecular structure | 6 | 60 | 2196 | 3175 |
| 289 | Pharmacognosy | 2 | 58 | 2638 | 2891 |
| 289 | Medicinal plants | 3 | 58 | 1714 | 2341 |
| 289 | venom | 3 | 58 | 1065 | 1167 |
| 289 | Toxins | 3 | 58 | 1183 | 1268 |
| 293 | Computer Graphics | 4 | 56 | 1678 | 2044 |
| 293 | Investment analysis | 3 | 56 | 903 | 1025 |
| 293 | plant communities | 1 | 56 | 1921 | 1843 |
| 293 | Plant cells | 1 | 56 | 1930 | 2258 |
| 297 | Nondestructive testing | 1 | 55 | 1370 | 854 |
| 297 | food technology | 6 | 55 | 2200 | 3778 |
| 297 | Pesticides | 4 | 55 | 662 | 916 |
| 300 | Industrial Engineering | 20 | 54 | 684 | 2578 |
| 301 | Sports Medicine | 8 | 53 | 2025 | 3091 |
| 301 | Spectrum analysis | 7 | 53 | 3758 | 5610 |
| 301 | Fungi | 3 | 53 | 1257 | 1645 |
| 304 | Orthopedics | 1 | 52 | 3048 | 2404 |
| 304 | Carbon | 1 | 52 | 2396 | 2343 |
| 304 | sports injuries | 1 | 52 | 1212 | 748 |
| 304 | Insect biochemistry | 6 | 52 | 319 | 798 |
| 308 | Electrical Engineering | 8 | 51 | 2713 | 3131 |
| 308 | Educational Psychology | 4 | 51 | 1381 | 1841 |
| 308 | Quantum Gravity | 4 | 51 | 2007 | 2273 |
| 308 | Entropy | 4 | 51 | 1075 | 1262 |
| 312 | Clinical Chemistry | 4 | 50 | 3393 | 4669 |
| 313 | Zoology | 6 | 49 | 2377 | 3217 |
| 313 | Algebra | 12 | 49 | 915 | 1184 |
| 315 | Astrophysics | 6 | 48 | 2873 | 3860 |
| 315 | Medical Physics | 2 | 48 | 2501 | 2371 |
| 315 | Geographic information systems | 4 | 48 | 1113 | 1365 |
| 318 | Child | 3 | 47 | 3333 | 3674 |
| 318 | Radiation | 5 | 47 | 2196 | 3021 |
| 318 | Intelligent Control Systems | 16 | 47 | 308 | 1120 |
| 318 | animals | 6 | 47 | 1059 | 1663 |
| 322 | Great Lakes | 1 | 46 | 494 | 388 |
| 323 | Agriculture | 3 | 45 | 2903 | 3453 |
| 324 | Neurophysiology | 6 | 44 | 2670 | 4753 |
| 324 | Ethology | 4 | 44 | 1616 | 2810 |
| 326 | Agricultural Biotechnology | 2 | 43 | 479 | 229 |
| 326 | Bifurcation Theory | 4 | 43 | 618 | 754 |
| 326 | Transnational corporations | 1 | 43 | 756 | 593 |
| 326 | bioclimatology | 3 | 43 | 1113 | 1570 |
| 326 | Bioinorganic chemistry | 3 | 43 | 1669 | 2214 |
| 326 | International Finance | 1 | 43 | 2659 | 2162 |
| 332 | Archaeology | 7 | 42 | 1044 | 1716 |
| 332 | Rural Development | 1 | 42 | 1261 | 873 |
| 332 | nuclear magnetic resonance | 4 | 42 | 1214 | 1565 |
| 332 | Magnetic Resonance Spectroscopy | 4 | 42 | 1350 | 1723 |
| 336 | Information Theory | 7 | 41 | 885 | 1643 |
| 337 | Adaptive control systems | 5 | 40 | 452 | 728 |
| 337 | Telecommunication | 4 | 40 | 2398 | 2736 |
| 339 | Plant Taxonomy | 3 | 39 | 498 | 676 |
| 339 | Physical Chemistry | 5 | 39 | 2187 | 3446 |
| 339 | global environmental change | 1 | 39 | 1721 | 1843 |
| 339 | Plant hormones | 3 | 39 | 352 | 657 |
| 339 | Mitochondrial DNA | 10 | 39 | 46 | 174 |
| 339 | environmental issues | 1 | 39 | 976 | 964 |
| 345 | Telecommunication Systems | 5 | 38 | 1421 | 2028 |
| 345 | Social behavior | 4 | 38 | 1199 | 2069 |
| 347 | Systems Analysis | 5 | 37 | 965 | 1702 |
| 347 | food industry | 3 | 37 | 779 | 1081 |
| 349 | Statistics | 8 | 36 | 2077 | 3391 |
| 349 | Social Change | 2 | 36 | 1390 | 2043 |
| 349 | Digital Audio Broadcasting | 4 | 36 | 8 | 16 |
| 352 | Computer Science | 9 | 35 | 1407 | 2975 |
| 352 | Number Theory | 10 | 35 | 466 | 745 |
| 352 | Learning | 3 | 35 | 1633 | 2340 |
| 355 | Diagnostic Imaging | 4 | 34 | 2323 | 3457 |
| 355 | Electrochemical Analysis | 2 | 34 | 2083 | 2376 |
| 355 | Microstructure | 10 | 34 | 403 | 1222 |
| 358 | Agricultural Science | 1 | 33 | 530 | 669 |
| 358 | Visual Communication | 2 | 33 | 683 | 684 |
| 358 | Medical Microbiology | 2 | 33 | 3611 | 4814 |
| 358 | Image enhancement | 2 | 33 | 470 | 625 |
| 358 | Communication | 2 | 33 | 2995 | 2969 |
| 358 | Decision making | 3 | 33 | 1882 | 2679 |
| 364 | Information Retrieval | 6 | 32 | 309 | 876 |
| 364 | Herbal medicine | 1 | 32 | 1534 | 1793 |
| 364 | Gene expression regulation | 2 | 32 | 1618 | 2110 |
| 364 | Genetic regulation | 2 | 32 | 1834 | 2530 |
| 364 | protein | 2 | 32 | 1880 | 2245 |
| 364 | personality | 3 | 32 | 1599 | 2521 |
| 364 | Combinatorial analysis | 6 | 32 | 898 | 1083 |
| 371 | Data Mining | 3 | 31 | 2091 | 3350 |
| 371 | Solar Energy | 2 | 31 | 2418 | 3245 |
| 373 | Bioremediation | 1 | 30 | 1807 | 1857 |
| 373 | Hematopoietic stem cell transplantation | 1 | 30 | 1015 | 1213 |
| 373 | Water quality | 1 | 30 | 631 | 535 |
| 373 | Stem cells | 1 | 30 | 3034 | 3145 |
| 373 | Water chemistry | 1 | 30 | 907 | 725 |
| 378 | Forest Ecology | 1 | 29 | 1940 | 2105 |
| 378 | dietary supplements | 3 | 29 | 936 | 1805 |
| 378 | Ceramic materials | 1 | 29 | 2455 | 2269 |
| 378 | Business | 1 | 29 | 3924 | 3426 |
| 378 | Forest Management | 1 | 29 | 1907 | 2007 |
| 378 | behavior modification | 1 | 29 | 722 | 856 |
| 384 | Evolutionary Computation | 2 | 28 | 553 | 842 |
| 384 | Swarm Intelligence | 2 | 28 | 372 | 657 |
| 384 | Computational Complexity | 9 | 28 | 551 | 1532 |
| 384 | bioluminescence | 1 | 28 | 820 | 584 |
| 384 | children | 1 | 28 | 1142 | 1031 |
| 389 | Social Sciences | 6 | 27 | 3318 | 5032 |
| 389 | Humanities | 7 | 27 | 1302 | 2276 |
| 389 | Internet of Things | 2 | 27 | 938 | 1189 |
| 389 | Polymers | 3 | 27 | 5192 | 6554 |
| 389 | Financial Engineering | 2 | 27 | 321 | 510 |
| 389 | Animal genetics | 1 | 27 | 1139 | 1182 |
| 389 | internet | 2 | 27 | 1801 | 2066 |
| 389 | polymerization | 3 | 27 | 4404 | 5509 |
| 389 | finance | 2 | 27 | 3082 | 3157 |
| 398 | Ecological Genetics | 2 | 26 | 1006 | 1223 |
| 398 | Ecophysiology | 1 | 26 | 587 | 579 |
| 398 | Fracture mechanics | 1 | 26 | 2439 | 2357 |
| 398 | Environmental Geochemistry | 1 | 26 | 1235 | 1245 |
| 398 | data collection | 2 | 26 | 1801 | 2640 |
| 398 | United States | 3 | 26 | 7098 | 8866 |
| 398 | Minerals | 1 | 26 | 1633 | 1643 |
| 405 | Horticulture | 2 | 25 | 1159 | 1372 |
| 405 | Social Psychology | 2 | 25 | 3016 | 3833 |
| 405 | Functional equations | 9 | 25 | 72 | 276 |
| 408 | Physical Geography | 3 | 24 | 657 | 1041 |
| 408 | Plant Biotechnology | 2 | 24 | 1186 | 1667 |
| 408 | DNS | 1 | 24 | 1162 | 1307 |
| 408 | DNA | 1 | 24 | 1389 | 1387 |
| 412 | Geology | 4 | 23 | 3195 | 4674 |
| 412 | Educational Sociology | 1 | 23 | 745 | 636 |
| 412 | Quantum Chemistry | 3 | 23 | 1087 | 1380 |
| 412 | Fiber Optics | 5 | 23 | 411 | 781 |
| 412 | Molecular Spectroscopy | 3 | 23 | 2138 | 3308 |
| 412 | human behavior | 2 | 23 | 3702 | 5574 |
| 412 | Phytotherapy | 1 | 23 | 1812 | 2099 |
| 412 | Behavior | 2 | 23 | 4739 | 6611 |
| 420 | Early Childhood Education | 1 | 22 | 1092 | 975 |
| 420 | Plant genetic engineering | 1 | 22 | 1777 | 2053 |
| 420 | Natural history | 7 | 22 | 3736 | 8377 |
| 423 | Cloud Computing | 1 | 21 | 546 | 562 |
| 423 | Geophysics | 4 | 21 | 3798 | 5904 |
| 423 | Microbial Genetics | 1 | 21 | 780 | 858 |
| 423 | Mass Spectrometry | 3 | 21 | 1531 | 2470 |
| 423 | phytopathogenic bacteria | 1 | 21 | 532 | 720 |
| 428 | Computational Chemistry | 2 | 20 | 1006 | 1455 |
| 428 | Plant Genetics | 2 | 20 | 971 | 1658 |
| 428 | Boundary Value Problems | 9 | 20 | 167 | 520 |
| 428 | Biometrics | 1 | 20 | 2136 | 2079 |
| 432 | Research Design | 1 | 19 | 2751 | 3025 |
| 432 | Liposomes | 1 | 19 | 1150 | 1275 |
| 432 | Lipid bilayers | 1 | 19 | 915 | 992 |
| 432 | Microscopy | 6 | 19 | 1450 | 3045 |
| 436 | Computer Engineering | 1 | 18 | 1805 | 1707 |
| 436 | Neurochemistry | 3 | 18 | 2906 | 4818 |
| 436 | Atmospheric Physics | 2 | 18 | 2224 | 3124 |
| 436 | Cell Biology | 2 | 18 | 5763 | 7831 |
| 436 | Photochemistry | 3 | 18 | 2203 | 3734 |
| 436 | Evidence-Based Medicine | 1 | 18 | 2746 | 2852 |
| 436 | Photobiology | 3 | 18 | 1699 | 3014 |
| 436 | Medical innovations | 1 | 18 | 2251 | 3243 |
| 436 | data protection | 1 | 18 | 1205 | 1159 |
| 445 | Mechatronics | 3 | 17 | 801 | 1539 |
| 445 | Remote Sensing | 1 | 17 | 2895 | 2529 |
| 445 | food handling | 2 | 17 | 1317 | 2389 |
| 445 | Chemical structure | 3 | 17 | 595 | 1008 |
| 445 | Evolution equations | 4 | 17 | 113 | 278 |
| 445 | Perception | 2 | 17 | 3111 | 4333 |
| 451 | Fluid Mechanics | 1 | 16 | 3042 | 3146 |
| 451 | Economic Development | 1 | 16 | 3312 | 3578 |
| 451 | Regional Planning | 1 | 16 | 2923 | 2886 |
| 451 | Immunopathology | 1 | 16 | 2669 | 3219 |
| 451 | Ocean Engineering | 1 | 16 | 2772 | 3160 |
| 451 | supercritical fluids | 1 | 16 | 764 | 1088 |
| 451 | city planning | 1 | 16 | 3065 | 3131 |
| 451 | Detectors | 6 | 16 | 674 | 1920 |
| 451 | biological monitoring | 1 | 16 | 1160 | 1599 |
| 451 | Developing countries | 1 | 16 | 4840 | 5026 |
| 461 | Emulsions | 1 | 15 | 832 | 846 |
| 461 | Wind power | 2 | 15 | 475 | 767 |
| 463 | Measurement | 3 | 14 | 1489 | 2889 |
| 464 | Paleoclimatology | 3 | 13 | 1246 | 2269 |
| 464 | Human-Computer Interaction | 3 | 13 | 1787 | 3436 |
| 464 | Statistical Mechanics | 4 | 13 | 1260 | 1961 |
| 464 | Biomechanics | 2 | 13 | 2266 | 3414 |
| 464 | Behavioral research | 6 | 13 | 296 | 1388 |
| 464 | Chromatography | 1 | 13 | 3141 | 3753 |
| 464 | Smoking | 1 | 13 | 1558 | 2125 |
| 464 | Obesity | 1 | 13 | 3932 | 5100 |
| 464 | Substance Abuse | 1 | 13 | 2864 | 3403 |
| 464 | drug addiction | 1 | 13 | 2282 | 2932 |
| 464 | alcoholism | 1 | 13 | 2944 | 3633 |
| 464 | Chromatographic analysis | 1 | 13 | 3573 | 4088 |
| 464 | Intellectual disability | 2 | 13 | 1305 | 2032 |
| 477 | Public Health | 4 | 12 | 6858 | 11983 |
| 477 | Developmental Genetics | 1 | 12 | 1091 | 1603 |
| 477 | Group theory | 1 | 12 | 159 | 75 |
| 477 | Cognitive Therapy | 1 | 12 | 1289 | 1634 |
| 477 | psychotherapy | 1 | 12 | 2607 | 2931 |
| 482 | Neuropsychology | 2 | 11 | 3369 | 5105 |
| 482 | Paleoecology | 2 | 11 | 1412 | 2219 |
| 482 | Cosmology | 2 | 11 | 1908 | 2142 |
| 482 | behavioral medicine | 1 | 11 | 2798 | 3944 |
| 482 | Paleogeography | 2 | 11 | 1248 | 2021 |
| 482 | Child Development | 1 | 11 | 3730 | 4519 |
| 482 | mass transfer | 1 | 11 | 2812 | 3397 |
| 482 | Developmental Disabilities | 1 | 11 | 1939 | 2638 |
| 482 | Mechanics | 1 | 11 | 2537 | 2546 |
| 482 | Electromagnetic fields | 5 | 11 | 225 | 649 |
| 482 | synthesis | 1 | 11 | 1950 | 2118 |
| 493 | Experimental Psychology | 1 | 10 | 1030 | 1194 |
| 493 | Food Safety | 1 | 10 | 624 | 938 |
| 493 | Optical Communications | 3 | 10 | 720 | 1430 |
| 493 | epilepsy | 1 | 10 | 2011 | 2664 |
| 493 | Geobiology | 1 | 10 | 940 | 1283 |
| 493 | water supply | 2 | 10 | 1360 | 2428 |
| 493 | disabilities | 1 | 10 | 1633 | 2105 |
| 493 | Safety management | 4 | 10 | 559 | 1818 |
| 501 | Mechanical Engineering | 1 | 9 | 4384 | 4520 |
| 501 | Fuzzy Logic | 1 | 9 | 294 | 452 |
| 501 | emergency management | 1 | 9 | 1923 | 2618 |
| 501 | Fuzzy Sets | 1 | 9 | 150 | 283 |
| 501 | Herpetology | 1 | 9 | 744 | 853 |
| 501 | Crystallography | 4 | 9 | 1826 | 2794 |
| 501 | Plastics | 1 | 9 | 3144 | 3617 |
| 501 | Family | 1 | 9 | 1900 | 2467 |
| 501 | families | 1 | 9 | 1684 | 2036 |
| 501 | Fuzzy algorithms | 1 | 9 | 150 | 283 |
| 501 | Amphibians | 1 | 9 | 712 | 670 |
| 501 | Reptiles | 1 | 9 | 777 | 808 |
| 513 | Medical Technology | 2 | 8 | 2990 | 5266 |
| 513 | Mental Health | 2 | 8 | 2588 | 4341 |
| 513 | Ecohydrology | 1 | 8 | 831 | 1198 |
| 513 | solar power | 1 | 8 | 1585 | 2298 |
| 513 | Family Therapy | 1 | 8 | 1476 | 1912 |
| 513 | Pacific Islands | 1 | 8 | 808 | 1078 |
| 513 | plant viruses | 1 | 8 | 438 | 722 |
| 513 | solar cells | 1 | 8 | 1730 | 2479 |
| 513 | Aquatic ecology | 2 | 8 | 1413 | 2465 |
| 522 | Pharmaceutical Technology | 1 | 7 | 2812 | 3808 |
| 522 | Plant Ecology | 1 | 7 | 3025 | 4102 |
| 522 | Particle Physics | 1 | 7 | 1463 | 1458 |
| 522 | Quantum electronics | 6 | 7 | 814 | 2301 |
| 522 | Quality Control | 1 | 7 | 3606 | 4718 |
| 522 | Technology Assessment | 1 | 7 | 845 | 1578 |
| 522 | Climate change | 1 | 7 | 1970 | 3013 |
| 522 | Biodiversity conservation | 2 | 7 | 2413 | 4069 |
| 522 | Eutrophication | 1 | 7 | 1815 | 2778 |
| 522 | Microfluidics | 1 | 7 | 513 | 853 |
| 522 | feeding behavior | 1 | 7 | 1552 | 2264 |
| 522 | aromatic plants | 1 | 7 | 505 | 725 |
| 522 | probabilities | 2 | 7 | 1720 | 2252 |
| 522 | catalytic activity | 1 | 7 | 1114 | 1576 |
| 522 | Cerebral cortex | 2 | 7 | 1320 | 2437 |
| 522 | Appetite | 1 | 7 | 1390 | 2059 |
| 538 | Law | 1 | 6 | 2912 | 2367 |
| 538 | Criminology | 1 | 6 | 1691 | 2053 |
| 538 | Biostatistics | 1 | 6 | 479 | 571 |
| 538 | Cryptography | 1 | 6 | 1297 | 1401 |
| 538 | Production Engineering | 1 | 6 | 3518 | 4290 |
| 538 | Human Rights | 1 | 6 | 1253 | 1580 |
| 538 | Critical Legal Studies | 1 | 6 | 279 | 332 |
| 538 | social justice | 1 | 6 | 775 | 874 |
| 538 | Coding Theory | 1 | 6 | 691 | 781 |
| 538 | Optoelectronic devices | 5 | 6 | 736 | 2026 |
| 548 | Pharmacy | 1 | 5 | 4217 | 5612 |
| 548 | Surveying | 1 | 5 | 399 | 455 |
| 548 | Cartography | 1 | 5 | 1202 | 1274 |
| 548 | Medical genetics | 1 | 5 | 5001 | 6680 |
| 548 | Geodesy | 1 | 5 | 1560 | 2230 |
| 548 | Photogrammetry | 1 | 5 | 1840 | 1746 |
| 548 | Biological Systems | 1 | 5 | 1696 | 2480 |
| 548 | Quality Assurance | 1 | 5 | 984 | 1570 |
| 548 | Fractional Calculus | 1 | 5 | 379 | 580 |
| 548 | big data | 1 | 5 | 1254 | 1800 |
| 548 | Protective coatings | 1 | 5 | 393 | 584 |
| 548 | Teaching | 1 | 5 | 3444 | 4251 |
| 548 | thinking | 1 | 5 | 601 | 980 |
| 548 | Chemical industry | 1 | 5 | 2602 | 3312 |
| 548 | Creativity | 1 | 5 | 639 | 1110 |
| 563 | Epidemiology | 2 | 4 | 5951 | 9703 |
| 563 | Nuclear Engineering | 1 | 4 | 2367 | 2861 |
| 563 | Nuclear Energy | 1 | 4 | 2250 | 2649 |
| 563 | Tribology | 1 | 4 | 2143 | 2944 |
| 563 | Epigenetics | 2 | 4 | 324 | 955 |
| 563 | Topology | 1 | 4 | 606 | 710 |
| 563 | Integrated Circuits | 3 | 4 | 895 | 1756 |
| 563 | Seed technology | 3 | 4 | 8 | 58 |
| 563 | Epigenomics | 2 | 4 | 320 | 935 |
| 563 | Radioisotopes | 2 | 4 | 1923 | 3224 |
| 563 | Microorganisms | 1 | 4 | 2340 | 3554 |
| 563 | Seeds | 3 | 4 | 8 | 59 |
| 563 | heredity | 1 | 4 | 1521 | 2256 |
| 563 | software | 1 | 4 | 2018 | 3159 |
| 563 | biomedicine | 2 | 4 | 1464 | 3268 |
| 563 | Immune system | 1 | 4 | 2145 | 3138 |
| 563 | Metals | 1 | 4 | 3872 | 4822 |
| 563 | Immunity | 1 | 4 | 3565 | 5061 |
| 581 | Astronomy | 2 | 3 | 3573 | 5363 |
| 581 | Thermodynamics | 1 | 3 | 2260 | 2925 |
| 581 | Bryology | 1 | 3 | 454 | 616 |
| 581 | Production Planning | 1 | 3 | 589 | 1125 |
| 581 | Disability Studies | 1 | 3 | 625 | 997 |
| 581 | Computer-Aided Design | 2 | 3 | 1818 | 3425 |
| 581 | Learning disabilities | 1 | 3 | 1565 | 2411 |
| 581 | Production Control | 1 | 3 | 575 | 1108 |
| 581 | Mycotoxins | 1 | 3 | 361 | 702 |
| 581 | Fish diseases | 1 | 3 | 287 | 580 |
| 581 | Korea | 1 | 3 | 833 | 1228 |
| 581 | mosses | 1 | 3 | 284 | 423 |
| 581 | liverworts | 1 | 3 | 284 | 423 |
| 581 | place marketing | 1 | 3 | 237 | 585 |
| 581 | Autism | 4 | 3 | 721 | 2248 |
| 596 | Sociology | 2 | 2 | 4577 | 8065 |
| 596 | Endocrinology | 1 | 2 | 5665 | 7410 |
| 596 | Language Disorders | 3 | 2 | 997 | 2498 |
| 596 | Econometrics | 1 | 2 | 2373 | 3175 |
| 596 | Ceramics | 1 | 2 | 2726 | 3706 |
| 596 | Marine Biotechnology | 1 | 2 | 545 | 1087 |
| 596 | Physical organic chemistry | 1 | 2 | 2386 | 3453 |
| 596 | Sustainable agriculture | 1 | 2 | 1584 | 2647 |
| 596 | Chemical kinetics | 2 | 2 | 1125 | 2160 |
| 596 | Knowledge management | 1 | 2 | 1504 | 2309 |
| 596 | Water quality management | 1 | 2 | 3474 | 5191 |
| 596 | Wetland ecology | 1 | 2 | 1036 | 1753 |
| 596 | Wetland conservation | 1 | 2 | 757 | 1367 |
| 596 | Physical fitness | 1 | 2 | 1990 | 2913 |
| 596 | natural products | 2 | 2 | 2510 | 4330 |
| 596 | biological factors | 1 | 2 | 3597 | 5268 |
| 596 | Host-parasite interactions | 1 | 2 | 2508 | 3893 |
| 596 | Personality Assessment | 1 | 2 | 1056 | 1691 |
| 596 | Glass | 1 | 2 | 2063 | 3046 |
| 596 | pottery | 1 | 2 | 1987 | 2938 |
| 596 | Population | 1 | 2 | 2266 | 3377 |
| 596 | Nanotubes | 1 | 2 | 483 | 896 |
| 596 | smart structures | 1 | 2 | 276 | 485 |
| 596 | Wetlands | 1 | 2 | 772 | 1388 |
| 620 | Systems Theory | 2 | 1 | 970 | 2461 |
| 620 | Ecological Engineering | 1 | 1 | 1343 | 2381 |
| 620 | Geriatric Nursing | 1 | 1 | 1064 | 1939 |
| 620 | Signal Transduction | 1 | 1 | 2656 | 4009 |
| 620 | Psycholinguistics | 1 | 1 | 1743 | 2709 |
| 620 | Cytogenetics | 1 | 1 | 3085 | 4630 |
| 620 | Quantum Mechanics | 1 | 1 | 419 | 633 |
| 620 | Psychopharmacology | 1 | 1 | 3104 | 4356 |
| 620 | Nuclear Chemistry | 2 | 1 | 1649 | 3090 |
| 620 | Radiochemistry | 2 | 1 | 1562 | 2955 |
| 620 | Heterocyclic chemistry | 1 | 1 | 1158 | 1810 |
| 620 | Wireless Communication Systems | 1 | 1 | 3456 | 4726 |
| 620 | Multivariate Analysis | 1 | 1 | 931 | 1483 |
| 620 | Expert Systems | 2 | 1 | 302 | 1198 |
| 620 | preventive medicine | 1 | 1 | 2922 | 4636 |
| 620 | Functional foods | 1 | 1 | 899 | 1656 |
| 620 | soil pollution | 1 | 1 | 1257 | 2125 |
| 620 | Neuropharmacology | 1 | 1 | 1262 | 2107 |
| 620 | acupuncture | 2 | 1 | 356 | 877 |
| 620 | Asymmetric synthesis | 1 | 1 | 336 | 742 |
| 620 | Sports | 7 | 1 | 1644 | 4756 |
| 620 | Massage therapy | 2 | 1 | 89 | 154 |
| 620 | Molecules | 3 | 1 | 1834 | 3629 |
| 620 | X-rays | 2 | 1 | 1123 | 2263 |
| 620 | Writing | 1 | 1 | 534 | 949 |
| 620 | medical education | 1 | 1 | 4006 | 5853 |
| 620 | Reading | 1 | 1 | 1028 | 1600 |
| 620 | North America | 1 | 1 | 1985 | 3157 |
| 620 | Southeast Asia | 1 | 1 | 964 | 1521 |
| 620 | Planets | 1 | 1 | 2610 | 3830 |
| 620 | Methodology | 3 | 1 | 540 | 1847 |
| 620 | Approximation Theory | 1 | 1 | 799 | 1130 |
| 620 | violence | 1 | 1 | 1878 | 3083 |
| 620 | Aggression | 1 | 1 | 960 | 1809 |
| 620 | Exercise | 7 | 1 | 980 | 3777 |
| 620 | Breeding | 1 | 1 | 2282 | 3530 |
| 656 | Health Policy | 1 | 0 | 5017 | 7710 |
| 656 | Applied Linguistics | 1 | 0 | 1192 | 1839 |
| 656 | Conservation Biology | 1 | 0 | 2256 | 3509 |
| 656 | Music | 1 | 0 | 1937 | 2800 |
| 656 | Computational Linguistics | 1 | 0 | 1241 | 2207 |
| 656 | E-Learning | 1 | 0 | 97 | 355 |
| 656 | Child welfare | 1 | 0 | 2335 | 4004 |
| 656 | Qualitative Research | 1 | 0 | 1019 | 1950 |
| 656 | East Asia | 1 | 0 | 1368 | 2355 |
| 656 | Latin America | 1 | 0 | 2436 | 3356 |
| 656 | Adolescent | 1 | 0 | 4460 | 6600 |
| 656 | Germany | 1 | 0 | 1605 | 2533 |
| 656 | Social work | 1 | 0 | 3074 | 4891 |
| 656 | Web-based instruction | 1 | 0 | 131 | 471 |
| 656 | United Kingdom | 1 | 0 | 3402 | 5175 |
| 656 | Women's health | 1 | 0 | 2927 | 4802 |
| 656 | drugs | 1 | 0 | 4383 | 6600 |
| 656 | Cell metabolism | 1 | 0 | 1526 | 2592 |
| 656 | World Wide Web | 1 | 0 | 973 | 1918 |
