| 1 | Astrophysics | 4,340 | 357.5K | 23 | 15 |
| 2 | Astronomy | 4,880 | 330.8K | 12 | 9 |
| 3 | Spectrum analysis | 3,301 | 243.4K | 19 | 11 |
| 4 | Geophysics | 4,249 | 226.8K | 8 | 7 |
| 5 | Physics | 1,393 | 140.1K | 343 | 243 |
| 6 | Planets | 2,221 | 128.2K | 4 | 4 |
| 7 | Science | 771 | 118.9K | 475 | 260 |
| 8 | Biology | 697 | 105.9K | 509 | 285 |
| 9 | Natural history | 512 | 89.2K | 105 | 177 |
| 10 | Solar System | 1,732 | 80.4K | 2 | 3 |
| 11 | Atmospheric Physics | 897 | 44.8K | 9 | 21 |
| 12 | Earth Sciences | 415 | 30.3K | 48 | 34 |
| 13 | Atmospheric Chemistry | 508 | 29.2K | 16 | 25 |
| 14 | Radiation | 278 | 28.0K | 24 | 1 |
| 15 | Optics | 1,573 | 27.7K | 26 | 52 |
| 16 | radiative transfer | 266 | 27.7K | 4 | 1 |
| 17 | Meteorology | 488 | 26.3K | 75 | 80 |
| 18 | Nuclear Physics | 531 | 26.2K | 435 | 331 |
| 19 | Chemistry | 319 | 23.6K | 1232 | 807 |
| 20 | Quantum Gravity | 333 | 17.8K | 190 | 138 |
| 21 | Climatology | 304 | 17.5K | 63 | 69 |
| 22 | Geology | 316 | 15.8K | 186 | 143 |
| 23 | atmospheric models | 340 | 15.3K | 5 | 12 |
| 24 | Oceanography | 254 | 14.0K | 103 | 92 |
| 25 | Ecology | 188 | 12.0K | 780 | 694 |
| 26 | Hydrology | 141 | 11.8K | 191 | 74 |
| 27 | exobiology | 206 | 11.5K | 3 | 3 |
| 28 | Statistical physics | 197 | 10.4K | 471 | 236 |
| 29 | Technology | 132 | 10.2K | 418 | 121 |
| 30 | Water | 100 | 9.9K | 279 | 147 |
| 31 | water supply | 99 | 9.9K | 68 | 32 |
| 32 | Molecular Spectroscopy | 218 | 9.8K | 18 | 6 |
| 33 | Geochemistry | 204 | 9.5K | 159 | 164 |
| 34 | Microbiology | 134 | 9.4K | 1201 | 940 |
| 35 | Solid State Physics | 189 | 9.3K | 642 | 442 |
| 36 | Materials | 106 | 9.2K | 1382 | 743 |
| 37 | Robotics | 178 | 9.1K | 35 | 16 |
| 38 | Condensed Matter | 173 | 8.9K | 646 | 460 |
| 39 | Environmental Health | 118 | 8.7K | 749 | 495 |
| 40 | Photonics | 38 | 8.2K | 429 | 106 |
| 41 | Environment | 90 | 7.5K | 920 | 800 |
| 42 | Electronics | 220 | 7.5K | 277 | 144 |
| 43 | Photography | 1,139 | 7.5K | 4 | 3 |
| 44 | Light | 22 | 7.4K | 283 | 58 |
| 45 | Control Theory | 207 | 7.0K | 50 | 34 |
| 46 | Electrochemistry | 207 | 6.2K | 386 | 332 |
| 47 | cryosphere | 77 | 5.9K | 19 | 11 |
| 48 | Pollution | 64 | 5.9K | 1360 | 853 |
| 49 | Meteorites | 128 | 5.8K | 99 | 136 |
| 50 | Geomagnetism | 80 | 5.6K | 64 | 18 |
| 51 | extraterrestrial environment | 343 | 5.5K | 2 | 3 |
| 52 | astronomical phenomena | 330 | 5.2K | 2 | 3 |
| 53 | Nanotechnology | 41 | 5.0K | 1795 | 925 |
| 54 | Microbial Ecology | 53 | 4.7K | 493 | 372 |
| 55 | Artificial Intelligence | 117 | 4.6K | 385 | 284 |
| 56 | Materials Science | 277 | 4.6K | 373 | 777 |
| 57 | Biodiversity | 65 | 4.5K | 302 | 207 |
| 58 | Engineering | 71 | 4.3K | 725 | 208 |
| 59 | Planetary Science | 131 | 4.2K | 22 | 21 |
| 60 | Sun | 76 | 4.1K | 59 | 41 |
| 61 | Mathematics | 83 | 3.9K | 1573 | 607 |
| 62 | Atomic spectroscopy | 40 | 3.8K | 191 | 29 |
| 63 | Biodiversity conservation | 46 | 3.7K | 389 | 420 |
| 64 | Dynamics | 32 | 3.7K | 397 | 27 |
| 65 | Biotechnology | 40 | 3.7K | 2214 | 1370 |
| 66 | Climate change | 41 | 3.7K | 199 | 343 |
| 66 | Eutrophication | 41 | 3.7K | 193 | 342 |
| 68 | Polymers | 98 | 3.6K | 983 | 784 |
| 69 | Marine Meteorology | 74 | 3.6K | 53 | 43 |
| 70 | Measurement | 21 | 3.5K | 325 | 26 |
| 71 | Geodesy | 66 | 3.5K | 43 | 9 |
| 72 | Biogeochemistry | 59 | 3.5K | 169 | 183 |
| 73 | polymerization | 91 | 3.4K | 839 | 664 |
| 74 | Quantum Optics | 35 | 3.4K | 141 | 25 |
| 75 | Bioengineering | 40 | 3.3K | 1362 | 1005 |
| 76 | Laser Spectroscopy | 32 | 3.2K | 134 | 24 |
| 77 | Celestial Mechanics | 100 | 3.2K | 3 | 1 |
| 78 | Biogeochemical cycles | 41 | 3.1K | 54 | 73 |
| 79 | Molecular Biology | 46 | 3.0K | 3160 | 2553 |
| 80 | Radio wave propagation | 81 | 2.9K | 23 | 3 |
| 81 | Marine Biology | 35 | 2.9K | 889 | 446 |
| 82 | Nanostructures | 8 | 2.9K | 1606 | 292 |
| 83 | Microorganisms | 40 | 2.8K | 189 | 201 |
| 84 | Autonomous robots | 37 | 2.7K | 6 | 9 |
| 85 | geological modeling | 42 | 2.7K | 39 | 36 |
| 86 | Geochemical Modeling | 41 | 2.7K | 33 | 36 |
| 87 | Metallurgy | 56 | 2.4K | 522 | 394 |
| 88 | Geobiology | 73 | 2.4K | 9 | 12 |
| 89 | Molecules | 79 | 2.3K | 194 | 188 |
| 90 | Environmental Engineering | 38 | 2.2K | 1075 | 809 |
| 91 | Climate | 30 | 2.2K | 60 | 45 |
| 92 | Environmental Microbiology | 24 | 2.2K | 391 | 272 |
| 93 | Computer Vision | 29 | 2.2K | 255 | 206 |
| 94 | United States | 46 | 2.1K | 1505 | 982 |
| 95 | Metals | 46 | 2.1K | 561 | 420 |
| 96 | Botany | 22 | 2.0K | 1958 | 1208 |
| 97 | Hydrometeorology | 41 | 2.0K | 19 | 42 |
| 98 | Electrical Engineering | 288 | 2.0K | 185 | 218 |
| 99 | Soil Science | 16 | 2.0K | 840 | 315 |
| 100 | Fluid Mechanics | 52 | 2.0K | 346 | 216 |
| 101 | Space telescopes | 131 | 1.9K | 3 | 28 |
| 102 | Cosmology | 35 | 1.9K | 385 | 134 |
| 103 | Agriculture | 25 | 1.8K | 791 | 371 |
| 104 | air | 22 | 1.8K | 35 | 35 |
| 105 | sanitation | 14 | 1.8K | 816 | 570 |
| 106 | Smart Materials | 22 | 1.7K | 223 | 72 |
| 107 | Optical materials | 15 | 1.7K | 1448 | 727 |
| 108 | Medicine | 33 | 1.7K | 5044 | 4175 |
| 109 | Statistical Mechanics | 39 | 1.7K | 208 | 83 |
| 109 | Magnetohydrodynamics | 39 | 1.7K | 72 | 52 |
| 111 | Biomedical Engineering | 47 | 1.6K | 1376 | 1290 |
| 112 | soil microbiology | 19 | 1.6K | 585 | 455 |
| 113 | atmosphere | 24 | 1.6K | 179 | 76 |
| 114 | miniaturization | 18 | 1.6K | 815 | 619 |
| 115 | Structural design | 10 | 1.5K | 403 | 67 |
| 116 | Microelectronics | 30 | 1.5K | 597 | 561 |
| 117 | Cybernetics | 18 | 1.5K | 468 | 197 |
| 118 | Mathematical Physics | 30 | 1.5K | 1136 | 608 |
| 119 | Environmental monitoring | 23 | 1.5K | 1635 | 1165 |
| 120 | Moon | 85 | 1.5K | 2 | 4 |
| 121 | Research | 30 | 1.5K | 4292 | 3356 |
| 122 | Medical Microbiology | 18 | 1.4K | 1244 | 927 |
| 123 | Biochemical Engineering | 2 | 1.4K | 4549 | 1520 |
| 124 | Combustion | 57 | 1.4K | 198 | 237 |
| 125 | Geography | 13 | 1.4K | 1292 | 481 |
| 126 | Evolution | 22 | 1.4K | 768 | 684 |
| 127 | global environmental change | 24 | 1.4K | 184 | 199 |
| 128 | Computer Graphics | 16 | 1.4K | 720 | 287 |
| 129 | actuators | 22 | 1.3K | 804 | 556 |
| 129 | transducers | 22 | 1.3K | 804 | 556 |
| 131 | Biochemistry | 30 | 1.3K | 4513 | 3881 |
| 132 | Seismology | 32 | 1.3K | 142 | 100 |
| 133 | biological evolution | 21 | 1.3K | 899 | 862 |
| 134 | Analytical Chemistry | 41 | 1.3K | 1591 | 1533 |
| 134 | Automation | 21 | 1.3K | 682 | 412 |
| 136 | Nuclear Engineering | 47 | 1.2K | 294 | 155 |
| 137 | Information Theory | 15 | 1.2K | 495 | 172 |
| 138 | Mineralogy | 49 | 1.2K | 308 | 381 |
| 139 | Glaciology | 27 | 1.2K | 39 | 28 |
| 139 | glaciers | 27 | 1.2K | 35 | 25 |
| 141 | Hydrodynamics | 21 | 1.2K | 152 | 94 |
| 142 | Geodynamics | 27 | 1.2K | 245 | 237 |
| 143 | Remote Sensing | 61 | 1.2K | 128 | 118 |
| 144 | Earthquakes | 29 | 1.2K | 79 | 37 |
| 145 | Image Processing | 26 | 1.1K | 571 | 486 |
| 146 | infrared radiation | 78 | 1.1K | 24 | 22 |
| 147 | mass transfer | 26 | 1.1K | 517 | 398 |
| 148 | Machine Learning | 7 | 1.1K | 206 | 86 |
| 149 | Ocean Engineering | 34 | 1.1K | 442 | 401 |
| 150 | Biogeography | 13 | 1.0K | 513 | 407 |
| 151 | Multiphase Flow | 10 | 1.0K | 166 | 59 |
| 152 | optical instruments | 23 | 1.0K | 100 | 85 |
| 153 | Systems Engineering | 76 | 993 | 172 | 320 |
| 154 | Plant physiology | 6 | 959 | 1785 | 925 |
| 155 | Volcanoes | 16 | 942 | 91 | 57 |
| 156 | Ceramics | 34 | 929 | 366 | 385 |
| 156 | Glass | 34 | 929 | 270 | 336 |
| 156 | pottery | 34 | 929 | 263 | 327 |
| 159 | Signal Processing | 13 | 913 | 989 | 403 |
| 160 | Physical Chemistry | 29 | 899 | 807 | 877 |
| 161 | Telecommunication | 33 | 897 | 567 | 389 |
| 162 | Medical Laboratory Science | 19 | 888 | 851 | 722 |
| 163 | Colloids | 15 | 870 | 2147 | 1645 |
| 164 | Biophysics | 31 | 862 | 2688 | 2682 |
| 165 | Environmental Policy | 14 | 860 | 1698 | 1444 |
| 166 | Sustainable Development | 11 | 853 | 1100 | 624 |
| 167 | Electromagnetism | 9 | 850 | 422 | 95 |
| 168 | Biocompatible Materials | 10 | 832 | 2642 | 2031 |
| 169 | Data Mining | 23 | 830 | 376 | 521 |
| 170 | Geomorphology | 10 | 823 | 862 | 502 |
| 171 | Petrology | 18 | 813 | 454 | 414 |
| 172 | Magnetic Materials | 4 | 791 | 1484 | 437 |
| 173 | Semiconductors | 46 | 783 | 415 | 445 |
| 174 | data collection | 18 | 782 | 258 | 391 |
| 175 | Hydraulic Engineering | 10 | 776 | 550 | 224 |
| 176 | System analysis | 30 | 765 | 695 | 644 |
| 177 | Computational Biology | 7 | 764 | 2503 | 1203 |
| 178 | space environment | 32 | 762 | 47 | 56 |
| 179 | Bioinformatics | 6 | 754 | 1902 | 953 |
| 180 | Natural resources | 8 | 752 | 479 | 222 |
| 181 | Biomechanics | 30 | 745 | 366 | 499 |
| 182 | Nonlinear Dynamics | 22 | 733 | 993 | 859 |
| 183 | Cosmochemistry | 51 | 730 | 69 | 296 |
| 184 | Solar Energy | 70 | 729 | 109 | 588 |
| 185 | Chemical Engineering | 22 | 719 | 2248 | 2301 |
| 186 | sustainability | 11 | 715 | 317 | 321 |
| 187 | Plant Ecology | 8 | 708 | 1291 | 859 |
| 188 | Solid State Chemistry | 19 | 688 | 1221 | 850 |
| 189 | genome | 4 | 671 | 1828 | 1063 |
| 190 | radar | 5 | 670 | 161 | 31 |
| 191 | Developing countries | 18 | 651 | 951 | 760 |
| 192 | Kinetics | 20 | 620 | 92 | 60 |
| 192 | Carbon | 24 | 620 | 406 | 708 |
| 194 | plant molecular biology | 4 | 611 | 1541 | 1029 |
| 194 | Plants | 4 | 611 | 2263 | 1125 |
| 196 | Environmental Chemistry | 10 | 610 | 1331 | 1160 |
| 197 | Freezing | 56 | 588 | 28 | 45 |
| 198 | Mass Spectrometry | 17 | 582 | 544 | 471 |
| 199 | Radio | 33 | 581 | 140 | 155 |
| 200 | Neural circuitry | 15 | 570 | 846 | 776 |
| 201 | Microwaves | 37 | 568 | 238 | 149 |
| 202 | Nanostructured Materials | 15 | 565 | 1850 | 1681 |
| 203 | Surface Chemistry | 15 | 563 | 2213 | 1970 |
| 204 | Genetics | 10 | 561 | 3044 | 2854 |
| 205 | Rock deformation | 14 | 529 | 38 | 35 |
| 206 | Genomics | 5 | 514 | 3404 | 1929 |
| 207 | Geographic information systems | 9 | 483 | 600 | 203 |
| 207 | Chemical kinetics | 18 | 483 | 193 | 85 |
| 209 | Computational Complexity | 4 | 474 | 1049 | 141 |
| 210 | nuclear astrophysics | 13 | 468 | 194 | 213 |
| 211 | environmental protection | 15 | 460 | 1820 | 1930 |
| 212 | Bioenergetics | 5 | 456 | 756 | 422 |
| 212 | Energy metabolism | 5 | 456 | 573 | 355 |
| 212 | cell membrane | 5 | 456 | 554 | 340 |
| 215 | Software Engineering | 20 | 455 | 289 | 249 |
| 216 | Ultrasonics | 20 | 447 | 289 | 492 |
| 216 | Ultrasound | 20 | 447 | 135 | 187 |
| 218 | Heat Exchangers | 4 | 446 | 1156 | 579 |
| 219 | ecosystem | 10 | 445 | 821 | 876 |
| 220 | Ferroelectricity | 22 | 442 | 261 | 172 |
| 221 | greenhouse effect | 8 | 440 | 18 | 9 |
| 221 | Carbon dioxide | 8 | 440 | 18 | 9 |
| 223 | Continental shelf | 15 | 433 | 145 | 176 |
| 224 | Nervous system | 5 | 428 | 2558 | 1823 |
| 225 | Sedimentology | 6 | 427 | 451 | 251 |
| 226 | Molecular Genetics | 4 | 426 | 2261 | 1339 |
| 227 | Virology | 2 | 425 | 4544 | 2858 |
| 228 | Organelle biogenesis | 14 | 420 | 40 | 52 |
| 229 | Computer Science | 18 | 418 | 805 | 573 |
| 230 | Engineering Mathematics | 25 | 415 | 834 | 738 |
| 231 | Sound | 18 | 413 | 223 | 119 |
| 232 | Cytology | 3 | 412 | 5228 | 3519 |
| 233 | weather forecasting | 10 | 404 | 93 | 82 |
| 234 | Catalysis | 12 | 403 | 2372 | 2418 |
| 235 | Radio frequency | 20 | 401 | 44 | 73 |
| 236 | Statistics | 21 | 395 | 1229 | 1237 |
| 236 | Origin of life | 12 | 395 | 25 | 29 |
| 238 | Cell Biology | 3 | 393 | 5044 | 3574 |
| 239 | Renewable Energy Sources | 7 | 388 | 2046 | 2139 |
| 239 | Imaging systems | 10 | 388 | 283 | 100 |
| 241 | Navigation | 24 | 385 | 68 | 89 |
| 242 | infrared technology | 28 | 382 | 34 | 20 |
| 243 | Medical innovations | 2 | 368 | 1688 | 1189 |
| 243 | biomimicry | 2 | 368 | 218 | 45 |
| 245 | Visual Perception | 25 | 358 | 696 | 1127 |
| 245 | Perception | 25 | 358 | 793 | 1272 |
| 247 | Memory | 23 | 353 | 821 | 1307 |
| 247 | Attention | 23 | 353 | 762 | 1189 |
| 249 | mathematical analysis | 13 | 352 | 1513 | 941 |
| 250 | Forest Management | 6 | 350 | 818 | 613 |
| 251 | Forest Ecology | 6 | 349 | 871 | 665 |
| 252 | environmental pollution | 5 | 347 | 4328 | 3352 |
| 253 | Fluid Dynamics | 14 | 346 | 550 | 544 |
| 254 | Energy Policy | 6 | 339 | 2164 | 1968 |
| 255 | Rheology | 13 | 338 | 255 | 259 |
| 256 | Quantum theory | 7 | 336 | 691 | 416 |
| 257 | Physical Geography | 1 | 332 | 1199 | 189 |
| 258 | Systems Biology | 8 | 329 | 1161 | 886 |
| 259 | Economic Development | 3 | 326 | 2089 | 1120 |
| 260 | Minerals | 6 | 322 | 546 | 276 |
| 260 | natural disasters | 13 | 322 | 526 | 675 |
| 262 | Conservation Biology | 2 | 316 | 1743 | 808 |
| 263 | Nanoparticles | 4 | 314 | 1964 | 1204 |
| 264 | Ceramic materials | 2 | 311 | 1887 | 623 |
| 265 | Climate Change Mitigation | 4 | 300 | 23 | 63 |
| 265 | Global warming | 4 | 300 | 79 | 66 |
| 265 | sea level | 4 | 300 | 23 | 63 |
| 268 | Mechanical Engineering | 30 | 299 | 803 | 1015 |
| 269 | plant communities | 1 | 295 | 1921 | 900 |
| 269 | Plant cells | 1 | 295 | 1930 | 1322 |
| 271 | Intelligent Control Systems | 15 | 287 | 337 | 250 |
| 271 | gene mapping | 3 | 287 | 2682 | 1826 |
| 273 | Bacteriology | 14 | 276 | 1073 | 1801 |
| 273 | nucleic acids | 2 | 276 | 2582 | 1746 |
| 275 | Digital electronics | 10 | 275 | 111 | 32 |
| 276 | Radiation effects | 13 | 274 | 190 | 396 |
| 277 | plankton | 2 | 270 | 330 | 103 |
| 278 | Immunology | 6 | 260 | 3656 | 3464 |
| 279 | biological monitoring | 2 | 258 | 784 | 270 |
| 280 | Industrial Microbiology | 7 | 255 | 1493 | 1634 |
| 280 | energy resources | 5 | 255 | 1184 | 1397 |
| 280 | lasers | 17 | 255 | 788 | 832 |
| 280 | Behavior | 1 | 255 | 5974 | 2866 |
| 284 | Wireless Communication Systems | 12 | 250 | 1119 | 942 |
| 285 | Electrophoresis | 17 | 247 | 715 | 1135 |
| 286 | Antibodies | 4 | 243 | 762 | 490 |
| 286 | Antigens | 4 | 243 | 1026 | 656 |
| 288 | Landscape Ecology | 2 | 242 | 707 | 352 |
| 289 | Systems Analysis | 4 | 235 | 1115 | 534 |
| 290 | Composite Materials | 6 | 230 | 2294 | 2237 |
| 290 | Mechanics | 6 | 230 | 1079 | 600 |
| 292 | polar regions | 6 | 229 | 532 | 397 |
| 293 | Neurology | 3 | 221 | 6587 | 4929 |
| 294 | Aerospace Engineering | 20 | 219 | 73 | 74 |
| 295 | emergency management | 7 | 218 | 540 | 488 |
| 296 | Photogrammetry | 17 | 208 | 264 | 138 |
| 297 | software | 9 | 203 | 493 | 740 |
| 298 | Pharmacology | 3 | 200 | 6677 | 4851 |
| 298 | Quantum Communication | 1 | 200 | 413 | 162 |
| 300 | mutation | 4 | 198 | 677 | 620 |
| 300 | Cognitive neuroscience | 1 | 198 | 1756 | 964 |
| 300 | Chromosomes | 4 | 198 | 1085 | 918 |
| 303 | Applied Sciences | 2 | 195 | 26 | 47 |
| 303 | Applied Mechanics | 2 | 195 | 26 | 47 |
| 305 | Molecular structure | 3 | 189 | 3047 | 1985 |
| 305 | Plasma devices | 8 | 189 | 196 | 222 |
| 307 | Neurophysiology | 2 | 188 | 4043 | 2933 |
| 307 | Combinatorial analysis | 11 | 188 | 618 | 428 |
| 309 | Information Systems | 4 | 186 | 1511 | 1062 |
| 310 | micromechanics | 5 | 184 | 503 | 417 |
| 311 | Japan | 10 | 180 | 1367 | 1204 |
| 312 | Structural dynamics | 5 | 179 | 916 | 915 |
| 313 | Immunochemistry | 4 | 175 | 1144 | 775 |
| 314 | Ecohydrology | 3 | 171 | 418 | 208 |
| 314 | Aquatic ecology | 3 | 171 | 1177 | 750 |
| 316 | Soil biology | 1 | 170 | 1615 | 1068 |
| 317 | Microstructure | 8 | 168 | 483 | 376 |
| 318 | computer networks | 14 | 155 | 1219 | 1791 |
| 319 | Particle Physics | 6 | 154 | 651 | 479 |
| 320 | Algal blooms | 1 | 153 | 609 | 355 |
| 320 | Cyanobacteria | 1 | 153 | 609 | 355 |
| 320 | microalgae | 1 | 153 | 609 | 355 |
| 323 | Computational Fluid Dynamics | 9 | 152 | 331 | 450 |
| 324 | Ergonomics | 11 | 150 | 595 | 744 |
| 324 | Numerical Analysis | 7 | 150 | 1856 | 1523 |
| 324 | Water quality management | 5 | 150 | 1645 | 1396 |
| 327 | solar cells | 8 | 148 | 549 | 1021 |
| 328 | Population Genetics | 2 | 146 | 1778 | 1457 |
| 328 | Molecular ecology | 2 | 146 | 1613 | 1483 |
| 330 | Telecommunication Systems | 10 | 144 | 911 | 1029 |
| 331 | fuel cells | 8 | 142 | 875 | 1377 |
| 332 | Quality Control | 8 | 141 | 1177 | 1608 |
| 333 | Nuclear Energy | 7 | 140 | 841 | 711 |
| 333 | Bifurcation Theory | 2 | 140 | 933 | 346 |
| 333 | Microscopy | 7 | 140 | 1303 | 1192 |
| 336 | Civil Engineering | 9 | 137 | 1097 | 802 |
| 336 | Pharmacokinetics | 2 | 137 | 1501 | 892 |
| 336 | Nuclear Chemistry | 2 | 137 | 1649 | 709 |
| 336 | Radiochemistry | 2 | 137 | 1562 | 630 |
| 336 | Water pollution | 4 | 137 | 2832 | 2973 |
| 336 | Computer-Aided Design | 4 | 137 | 1259 | 962 |
| 336 | Marine Pollution | 4 | 137 | 1219 | 1343 |
| 343 | Electronic Packaging | 8 | 136 | 86 | 99 |
| 344 | solar power | 5 | 135 | 697 | 973 |
| 345 | Experimental Design | 6 | 133 | 192 | 277 |
| 345 | Logic Programming | 1 | 133 | 599 | 140 |
| 347 | Computer Engineering | 18 | 125 | 127 | 455 |
| 348 | Number Theory | 3 | 123 | 983 | 317 |
| 348 | Superconductors | 13 | 123 | 322 | 479 |
| 348 | Electromagnetic waves | 14 | 123 | 39 | 129 |
| 351 | Superconductivity | 12 | 121 | 226 | 355 |
| 351 | wind erosion | 3 | 121 | 100 | 131 |
| 353 | China | 6 | 118 | 2516 | 2642 |
| 354 | Operations Research | 6 | 117 | 1849 | 1956 |
| 354 | Nonlinear Optics | 4 | 117 | 246 | 135 |
| 354 | Detectors | 3 | 117 | 1133 | 483 |
| 357 | System design | 13 | 116 | 57 | 195 |
| 358 | Paleontology | 5 | 114 | 1232 | 1139 |
| 358 | Medical Physics | 4 | 114 | 1867 | 1698 |
| 360 | Zoology | 3 | 113 | 3186 | 2253 |
| 361 | Regional Planning | 2 | 111 | 2201 | 1369 |
| 361 | Paleoceanography | 2 | 111 | 281 | 332 |
| 363 | Clinical Trials | 1 | 110 | 1438 | 561 |
| 363 | Research Design | 1 | 110 | 2751 | 1441 |
| 363 | Fractals | 15 | 110 | 430 | 1030 |
| 366 | Electrochemical Analysis | 2 | 109 | 2083 | 1504 |
| 367 | Urban Policy | 3 | 108 | 885 | 842 |
| 368 | Solitons | 14 | 107 | 365 | 946 |
| 368 | Chaos | 14 | 107 | 365 | 946 |
| 370 | Energy Storage | 8 | 104 | 844 | 1323 |
| 370 | hazard mitigation | 6 | 104 | 641 | 974 |
| 372 | Human-Computer Interaction | 8 | 103 | 984 | 1482 |
| 373 | Archaeology | 3 | 102 | 1624 | 1160 |
| 373 | bioclimatology | 6 | 102 | 683 | 958 |
| 373 | Sites | 3 | 102 | 651 | 761 |
| 376 | Virtual reality | 7 | 101 | 173 | 320 |
| 376 | Simulation | 3 | 101 | 207 | 219 |
| 376 | theoretical models | 3 | 101 | 207 | 219 |
| 379 | enzymes | 9 | 100 | 1031 | 1941 |
| 380 | Raman spectroscopy | 3 | 99 | 967 | 864 |
| 380 | Soft Condensed Matter | 1 | 99 | 1927 | 1208 |
| 380 | biopolymers | 1 | 99 | 2170 | 1339 |
| 383 | food technology | 2 | 98 | 3566 | 2999 |
| 383 | Great Lakes | 5 | 98 | 199 | 262 |
| 385 | particles | 2 | 97 | 1465 | 957 |
| 385 | Granular materials | 2 | 97 | 871 | 603 |
| 387 | protein | 2 | 96 | 1880 | 1479 |
| 387 | urban forestry | 2 | 96 | 404 | 266 |
| 387 | proteins | 2 | 96 | 3173 | 2561 |
| 390 | Ecological Engineering | 3 | 95 | 766 | 953 |
| 390 | Quantum electronics | 10 | 95 | 520 | 653 |
| 392 | Quantum Computing | 1 | 93 | 350 | 218 |
| 393 | Land use | 3 | 91 | 1347 | 1428 |
| 394 | Ophthalmology | 2 | 90 | 2628 | 2209 |
| 394 | Vision | 2 | 90 | 961 | 884 |
| 396 | Energy Conversion | 7 | 89 | 915 | 1732 |
| 396 | Molecular evolution | 2 | 89 | 2667 | 2374 |
| 396 | remote sensing technology | 5 | 89 | 19 | 45 |
| 399 | sedimentary basins | 1 | 88 | 416 | 284 |
| 399 | soil conservation | 2 | 88 | 1166 | 945 |
| 399 | Chromatography | 7 | 88 | 1277 | 1804 |
| 399 | land degradation | 2 | 88 | 741 | 647 |
| 399 | degradation | 2 | 88 | 741 | 647 |
| 404 | Analytical Biochemistry | 7 | 85 | 1399 | 2178 |
| 404 | Oncogenes | 1 | 85 | 2169 | 2191 |
| 406 | Thermodynamics | 3 | 84 | 1402 | 899 |
| 406 | Elementary particles | 1 | 84 | 360 | 323 |
| 408 | Thermochemistry | 1 | 82 | 941 | 514 |
| 408 | city planning | 2 | 82 | 2301 | 1643 |
| 410 | Chromatographic analysis | 6 | 79 | 1633 | 2095 |
| 411 | Nanophotonics | 2 | 76 | 449 | 465 |
| 411 | clay | 1 | 76 | 1530 | 1231 |
| 411 | clay minerals | 1 | 76 | 590 | 420 |
| 414 | Synchrotron Radiation | 3 | 75 | 476 | 439 |
| 414 | Radio waves | 8 | 75 | 188 | 232 |
| 416 | Petroleum Engineering | 2 | 73 | 1081 | 873 |
| 416 | Greenhouse gases | 2 | 73 | 503 | 562 |
| 416 | Combinatorial chemistry | 2 | 73 | 1337 | 1386 |
| 419 | Database Management | 4 | 72 | 812 | 944 |
| 419 | Sonar | 2 | 72 | 294 | 209 |
| 421 | Industrial Engineering | 3 | 71 | 2290 | 2274 |
| 421 | Simulation Methods | 15 | 71 | 268 | 1048 |
| 421 | machinery | 4 | 71 | 758 | 841 |
| 421 | Antarctica | 4 | 71 | 538 | 537 |
| 425 | Requirements Engineering | 1 | 70 | 171 | 123 |
| 425 | Agricultural Ecology | 2 | 70 | 1716 | 1888 |
| 425 | Terahertz Technology | 14 | 70 | 1 | 24 |
| 425 | vibration | 4 | 70 | 1269 | 1395 |
| 425 | coal | 4 | 70 | 1593 | 2354 |
| 425 | rehabilitation | 1 | 70 | 4377 | 2976 |
| 431 | Physiology | 2 | 68 | 5956 | 5710 |
| 431 | Diagnostic Imaging | 4 | 68 | 2323 | 2642 |
| 431 | impact | 4 | 68 | 316 | 551 |
| 434 | Environmental Management | 4 | 67 | 3017 | 4402 |
| 434 | elasticity | 5 | 67 | 180 | 249 |
| 436 | microwave communication systems | 2 | 66 | 240 | 120 |
| 437 | Enzyme | 6 | 65 | 321 | 877 |
| 437 | Algae | 3 | 65 | 871 | 1010 |
| 439 | Recycling | 1 | 63 | 1228 | 1380 |
| 440 | Anatomy | 1 | 62 | 3734 | 2765 |
| 440 | Embryology | 1 | 62 | 2887 | 2568 |
| 440 | Developmental Biology | 1 | 62 | 3792 | 3379 |
| 440 | cosmic rays | 3 | 62 | 600 | 554 |
| 440 | preventive medicine | 1 | 62 | 2922 | 2224 |
| 440 | Cell differentiation | 1 | 62 | 3181 | 3111 |
| 440 | Growth | 1 | 62 | 2248 | 2185 |
| 440 | Microwave devices | 7 | 62 | 75 | 86 |
| 448 | nanoscience | 3 | 61 | 3426 | 4066 |
| 449 | Nanoelectronics | 9 | 59 | 530 | 872 |
| 449 | energy conservation | 3 | 59 | 2313 | 3131 |
| 449 | Wireless Communication | 1 | 59 | 959 | 436 |
| 452 | Radiology | 3 | 58 | 2188 | 1993 |
| 453 | Hydrogeology | 2 | 57 | 1063 | 902 |
| 453 | Paleoclimatology | 6 | 57 | 908 | 1555 |
| 455 | Earthquake Engineering | 5 | 56 | 1098 | 1689 |
| 455 | free radicals | 1 | 56 | 2758 | 2567 |
| 457 | Mycology | 2 | 55 | 2398 | 2303 |
| 457 | Fungi | 2 | 55 | 1494 | 1621 |
| 459 | Extreme environments | 1 | 54 | 543 | 504 |
| 460 | Ultrasonic Imaging | 3 | 51 | 622 | 839 |
| 460 | cardiac catheterization | 2 | 51 | 1321 | 1143 |
| 462 | Landslides | 3 | 50 | 261 | 509 |
| 463 | Avionics | 3 | 49 | 16 | 22 |
| 464 | Turbulence | 1 | 48 | 500 | 316 |
| 464 | Metallography | 2 | 48 | 1190 | 1236 |
| 466 | Computational Linguistics | 1 | 47 | 1241 | 547 |
| 466 | Magnetic Resonance Spectroscopy | 6 | 47 | 1106 | 1644 |
| 468 | Organic Geochemistry | 1 | 46 | 748 | 797 |
| 468 | health planning | 2 | 46 | 3285 | 3094 |
| 470 | Economics | 3 | 45 | 4875 | 4524 |
| 470 | nuclear magnetic resonance | 5 | 45 | 1091 | 1528 |
| 470 | Crystallography | 6 | 45 | 1515 | 1645 |
| 473 | Paleoecology | 5 | 44 | 955 | 1626 |
| 473 | Industrial Safety | 1 | 44 | 2552 | 1750 |
| 473 | Radiation Protection | 3 | 44 | 911 | 687 |
| 473 | radiation monitoring | 3 | 44 | 803 | 646 |
| 473 | Industrial Ecology | 2 | 44 | 272 | 467 |
| 473 | Paleogeography | 5 | 44 | 832 | 1512 |
| 473 | Optoelectronic devices | 2 | 44 | 1318 | 835 |
| 473 | Radiation dosimetry | 3 | 44 | 605 | 496 |
| 473 | Nonlinear systems | 3 | 44 | 658 | 799 |
| 482 | Information Retrieval | 4 | 43 | 411 | 778 |
| 482 | Microfabrication | 5 | 43 | 293 | 596 |
| 482 | visualization | 5 | 43 | 1628 | 1384 |
| 482 | Information Science | 6 | 43 | 2110 | 3783 |
| 486 | Public Health | 1 | 42 | 11040 | 9133 |
| 486 | Marine Geology | 1 | 42 | 1081 | 909 |
| 486 | Petroleum Geology | 1 | 42 | 936 | 844 |
| 489 | Atmospheric Science | 5 | 41 | 165 | 342 |
| 489 | Optoelectronics | 2 | 41 | 839 | 567 |
| 489 | Engineering Geology | 5 | 41 | 1244 | 2116 |
| 489 | Regional Development | 1 | 41 | 572 | 466 |
| 489 | Plastics | 3 | 41 | 2042 | 2357 |
| 489 | Development planning | 1 | 41 | 524 | 433 |
| 489 | Korea | 5 | 41 | 265 | 390 |
| 489 | Asia | 5 | 41 | 2740 | 3612 |
| 489 | Economic planning | 1 | 41 | 1031 | 859 |
| 498 | Bioremediation | 2 | 40 | 1272 | 1628 |
| 499 | Maps | 3 | 39 | 166 | 237 |
| 500 | Differential Equations | 1 | 38 | 1652 | 1068 |
| 500 | Integrated Circuits | 9 | 38 | 394 | 641 |
| 500 | Ecosystem management | 2 | 38 | 1032 | 1242 |
| 503 | Interfaces | 2 | 36 | 484 | 507 |
| 504 | Thin Films | 2 | 35 | 908 | 868 |
| 505 | Biosensors | 1 | 34 | 2391 | 2897 |
| 505 | Latin America | 1 | 34 | 2436 | 1279 |
| 505 | Bioelectronics | 1 | 34 | 2094 | 2631 |
| 505 | Seaweed | 1 | 34 | 1084 | 1096 |
| 509 | Biomass Energy | 1 | 33 | 4271 | 4294 |
| 509 | Photochemistry | 3 | 33 | 2203 | 3132 |
| 509 | Organometallic compounds | 1 | 33 | 2122 | 1948 |
| 509 | France | 1 | 33 | 924 | 453 |
| 509 | Brain | 1 | 33 | 4582 | 4564 |
| 509 | Aging | 1 | 33 | 5476 | 4741 |
| 515 | Manufacturing Processes | 2 | 32 | 3121 | 3414 |
| 515 | Boundary Value Problems | 1 | 32 | 829 | 370 |
| 515 | Antenna Arrays | 1 | 32 | 333 | 188 |
| 518 | Crystallization | 1 | 30 | 1095 | 747 |
| 519 | Computational Chemistry | 2 | 29 | 1006 | 1275 |
| 520 | Geometry | 2 | 27 | 1641 | 1325 |
| 520 | Acoustics | 2 | 27 | 404 | 222 |
| 520 | Metallic Glasses | 1 | 27 | 856 | 872 |
| 520 | Knowledge | 2 | 27 | 594 | 552 |
| 520 | chronic disease | 1 | 27 | 832 | 845 |
| 520 | Chronic diseases | 1 | 27 | 1515 | 1770 |
| 526 | Pharmaceutical Chemistry | 2 | 26 | 5482 | 6620 |
| 526 | Clinical Chemistry | 2 | 26 | 4356 | 5508 |
| 526 | Multimedia Systems | 3 | 26 | 2010 | 2467 |
| 526 | Groundwater | 1 | 26 | 1373 | 1319 |
| 526 | Semiconductor industry | 6 | 26 | 500 | 1097 |
| 526 | Informatics | 4 | 26 | 879 | 1763 |
| 532 | Telecommunications | 3 | 25 | 924 | 1266 |
| 533 | Algorithms | 3 | 23 | 844 | 1163 |
| 533 | microwave antennas | 3 | 23 | 496 | 707 |
| 533 | Plant diseases | 2 | 23 | 2685 | 3196 |
| 536 | Environmental Law | 3 | 22 | 1370 | 2897 |
| 537 | Natural Sciences | 1 | 21 | 309 | 245 |
| 537 | environmental indicators | 2 | 21 | 1630 | 2697 |
| 537 | Technological Innovations | 2 | 21 | 1524 | 2169 |
| 537 | Wetland ecology | 1 | 21 | 1036 | 1090 |
| 537 | wetland management | 1 | 21 | 465 | 552 |
| 542 | Neuroimaging | 3 | 20 | 344 | 693 |
| 542 | Histochemistry | 1 | 20 | 2259 | 2321 |
| 542 | Food Microbiology | 1 | 20 | 2483 | 3100 |
| 542 | Ocean-atmosphere interaction | 1 | 20 | 220 | 138 |
| 542 | histological techniques | 1 | 20 | 1468 | 1888 |
| 542 | plant viruses | 1 | 20 | 438 | 534 |
| 542 | optical phenomena | 3 | 20 | 127 | 357 |
| 549 | Strategic planning | 1 | 19 | 1500 | 1554 |
| 549 | Entrepreneurship | 1 | 19 | 1912 | 2117 |
| 549 | forest policy | 1 | 19 | 808 | 932 |
| 549 | optical devices | 1 | 19 | 998 | 1004 |
| 549 | Nonlinear mechanics | 3 | 19 | 457 | 874 |
| 554 | Photobiology | 1 | 18 | 2690 | 3007 |
| 555 | Serology | 2 | 17 | 826 | 1328 |
| 555 | Algebra | 1 | 17 | 2394 | 1742 |
| 555 | technology transfer | 1 | 17 | 658 | 805 |
| 555 | Expert Systems | 1 | 17 | 539 | 556 |
| 555 | Speech acoustics | 1 | 17 | 1 | 1 |
| 555 | management | 3 | 17 | 3996 | 5948 |
| 555 | Membranes | 1 | 17 | 3114 | 3828 |
| 562 | Environmental Economics | 1 | 16 | 992 | 1081 |
| 562 | Watershed management | 1 | 16 | 572 | 576 |
| 564 | Materials Engineering | 2 | 15 | 1111 | 1551 |
| 564 | Production Engineering | 2 | 15 | 2715 | 3539 |
| 564 | Hypertension | 1 | 15 | 3111 | 3764 |
| 564 | Cardiovascular system | 1 | 15 | 3011 | 3739 |
| 564 | supercritical fluids | 2 | 15 | 548 | 1103 |
| 564 | Sedimentary rocks | 1 | 15 | 1065 | 1325 |
| 564 | Fuzzy systems | 4 | 15 | 1716 | 2907 |
| 564 | carbonate rocks | 1 | 15 | 298 | 283 |
| 572 | Nondestructive testing | 4 | 14 | 680 | 1501 |
| 572 | Microprocessors | 2 | 14 | 816 | 1238 |
| 572 | Aerosols | 3 | 14 | 701 | 1311 |
| 575 | Tribology | 1 | 13 | 2143 | 2446 |
| 575 | Environmental Geology | 1 | 13 | 2815 | 3410 |
| 575 | Solar power plants | 3 | 13 | 212 | 735 |
| 575 | drug resistance | 1 | 13 | 1731 | 2329 |
| 575 | Photovoltaic Cells | 3 | 13 | 212 | 736 |
| 575 | Societies | 2 | 13 | 251 | 353 |
| 581 | Economic History | 1 | 12 | 6306 | 5735 |
| 581 | Human Geography | 1 | 12 | 2098 | 2218 |
| 581 | Process Control | 2 | 12 | 1225 | 2293 |
| 581 | Educational Technology | 1 | 12 | 3053 | 3399 |
| 581 | Production Management | 2 | 12 | 1464 | 2602 |
| 581 | educational innovations | 1 | 12 | 1074 | 1227 |
| 587 | Marine Engineering | 2 | 11 | 433 | 539 |
| 587 | Naval Architecture | 2 | 11 | 464 | 757 |
| 587 | Fiber Optics | 1 | 11 | 1026 | 1053 |
| 587 | Biometrics | 1 | 11 | 2136 | 2442 |
| 587 | scientific research | 3 | 11 | 53 | 135 |
| 592 | Pediatrics | 1 | 10 | 5114 | 6083 |
| 592 | Bioinstrumentation | 5 | 10 | 33 | 152 |
| 592 | Diffraction | 5 | 10 | 89 | 337 |
| 592 | Plasma turbulence | 5 | 10 | 33 | 152 |
| 592 | X-ray spectroscopy | 2 | 10 | 361 | 658 |
| 592 | Electrons | 5 | 10 | 57 | 280 |
| 598 | Philosophy | 1 | 9 | 2833 | 1973 |
| 598 | Software Maintenance | 1 | 9 | 446 | 550 |
| 598 | Graph Theory | 1 | 9 | 1435 | 1305 |
| 598 | Optical Communications | 2 | 9 | 916 | 1460 |
| 598 | Discrete Mathematics | 1 | 9 | 716 | 590 |
| 598 | Plate Tectonics | 1 | 9 | 552 | 738 |
| 598 | Forecasting | 1 | 9 | 1138 | 1377 |
| 598 | Energy Harvesting | 1 | 9 | 808 | 1245 |
| 598 | Adaptive control systems | 1 | 9 | 1145 | 1395 |
| 598 | graph | 1 | 9 | 716 | 590 |
| 598 | Porous materials | 1 | 9 | 1493 | 1850 |
| 609 | Political Science | 1 | 8 | 3299 | 3031 |
| 609 | Intelligent Transportation Systems | 2 | 8 | 1041 | 1855 |
| 609 | Respiration | 2 | 8 | 2281 | 3906 |
| 612 | Obstetrics | 1 | 7 | 4822 | 5861 |
| 612 | Industrial Design | 1 | 7 | 581 | 856 |
| 612 | Emergency Medical Services | 1 | 7 | 1894 | 2557 |
| 612 | Mechatronics | 3 | 7 | 801 | 1958 |
| 612 | Cartography | 2 | 7 | 831 | 1159 |
| 612 | Clinical Immunology | 1 | 7 | 2604 | 3478 |
| 612 | Immunopathology | 1 | 7 | 2669 | 3580 |
| 612 | Emergency Medicine | 1 | 7 | 3232 | 3943 |
| 612 | Kalman Filtering | 2 | 7 | 186 | 306 |
| 612 | Chromosome mapping | 1 | 7 | 3750 | 5165 |
| 612 | Magnetic Separation | 1 | 7 | 6 | 2 |
| 612 | Environmental forensics | 1 | 7 | 212 | 363 |
| 612 | ports | 1 | 7 | 421 | 715 |
| 612 | Waterways | 1 | 7 | 197 | 267 |
| 612 | Foodborne diseases | 1 | 7 | 630 | 1005 |
| 612 | irrigation | 1 | 7 | 746 | 1022 |
| 612 | Harbors | 1 | 7 | 249 | 329 |
| 612 | weather | 2 | 7 | 858 | 1971 |
| 612 | pigments | 1 | 7 | 1520 | 2183 |
| 631 | Information Technology | 1 | 6 | 4887 | 5703 |
| 631 | Mobile Computing | 2 | 6 | 1688 | 2651 |
| 631 | Dietetics | 1 | 6 | 1829 | 2194 |
| 631 | Astrodynamics | 1 | 6 | 55 | 112 |
| 631 | Diet | 1 | 6 | 4280 | 5745 |
| 631 | phase diagrams | 1 | 6 | 332 | 443 |
| 631 | Scanning electron microscopy | 1 | 6 | 456 | 727 |
| 631 | aerosol | 2 | 6 | 598 | 1118 |
| 639 | Education | 4 | 5 | 4294 | 7968 |
| 639 | Neuropsychology | 1 | 5 | 4219 | 5599 |
| 639 | Radiotherapy | 1 | 5 | 856 | 800 |
| 639 | Animal ecology | 1 | 5 | 2153 | 2911 |
| 639 | Microwave circuits | 3 | 5 | 126 | 418 |
| 639 | air quality | 1 | 5 | 653 | 1134 |
| 639 | glycoproteins | 1 | 5 | 1035 | 1651 |
| 639 | Glycoconjugates | 1 | 5 | 1035 | 1651 |
| 639 | Oligosaccharide | 1 | 5 | 722 | 1213 |
| 639 | Carbohydrates | 1 | 5 | 984 | 1532 |
| 639 | social evolution | 1 | 5 | 40 | 111 |
| 639 | explosives | 2 | 5 | 371 | 660 |
| 639 | health services | 1 | 5 | 2434 | 3591 |
| 639 | Culture | 1 | 5 | 2126 | 2529 |
| 639 | smart structures | 1 | 5 | 276 | 334 |
| 639 | glycolipids | 1 | 5 | 1035 | 1651 |
| 655 | Social Sciences | 2 | 4 | 5522 | 8139 |
| 655 | Traffic Engineering | 1 | 4 | 805 | 1318 |
| 655 | Surveying | 4 | 4 | 133 | 500 |
| 655 | Soil Mechanics | 2 | 4 | 1553 | 2549 |
| 655 | occupational health and safety | 2 | 4 | 361 | 834 |
| 655 | industrial hygiene | 2 | 4 | 1839 | 3297 |
| 655 | Transportation | 2 | 4 | 2288 | 4001 |
| 655 | Australia | 2 | 4 | 3056 | 5540 |
| 663 | Electromagnetic compatibility | 1 | 3 | 236 | 353 |
| 663 | Adsorption | 1 | 3 | 485 | 831 |
| 665 | Organic Chemistry | 1 | 2 | 5024 | 6548 |
| 665 | Flexible manufacturing systems | 1 | 2 | 848 | 1566 |
| 665 | Multivariate Analysis | 1 | 2 | 931 | 1417 |
| 665 | Fracture mechanics | 1 | 2 | 2439 | 3440 |
| 665 | Leadership | 1 | 2 | 995 | 1694 |
| 665 | nuclear magnetic resonance spectroscopy | 1 | 2 | 1447 | 2095 |
| 665 | Scandinavia | 1 | 2 | 1336 | 2137 |
| 665 | NMR | 1 | 2 | 1097 | 1660 |
| 665 | Spain | 1 | 2 | 1620 | 1846 |
| 665 | magnetic resonance | 1 | 2 | 1152 | 1722 |
| 675 | Engineering Economics | 1 | 1 | 224 | 397 |
| 675 | Computer Architecture | 2 | 1 | 700 | 1483 |
| 675 | air quality management | 1 | 1 | 1240 | 2305 |
| 675 | Risk assessment | 1 | 1 | 1431 | 2626 |
| 675 | digital preservation | 1 | 1 | 246 | 537 |
| 675 | Radiobiology | 1 | 1 | 3408 | 4298 |
| 675 | Microfluidics | 1 | 1 | 513 | 997 |
| 675 | Calorimetry | 1 | 1 | 2207 | 3326 |
| 675 | indoor air pollution | 1 | 1 | 901 | 1742 |
| 675 | Ventilation | 1 | 1 | 1187 | 2124 |
| 675 | Sick building syndrome | 1 | 1 | 901 | 1742 |
| 675 | ADA | 1 | 1 | 167 | 169 |
| 675 | Jurisprudence | 1 | 1 | 1951 | 3007 |
| 675 | Criminal investigation | 1 | 1 | 467 | 866 |
| 675 | Thermal analysis | 1 | 1 | 2207 | 3326 |
| 675 | children | 1 | 1 | 1142 | 1895 |
| 691 | Medical Technology | 1 | 0 | 4049 | 6469 |
| 691 | Hematology | 1 | 0 | 5576 | 6889 |
| 691 | Agricultural Education | 1 | 0 | 286 | 577 |
| 691 | Nuclear Fusion | 1 | 0 | 1118 | 1734 |
| 691 | Municipal Engineering | 2 | 0 | 571 | 1690 |
| 691 | Dynamic programming | 1 | 0 | 52 | 108 |
| 691 | Liquid Crystals | 1 | 0 | 1667 | 2409 |
| 691 | Waste management | 2 | 0 | 2057 | 4333 |
| 691 | Knowledge management | 1 | 0 | 1504 | 2661 |
| 691 | blood transfusion | 1 | 0 | 1741 | 2660 |
| 691 | philology | 1 | 0 | 1342 | 1404 |
| 691 | monitoring | 1 | 0 | 710 | 1309 |
| 691 | Parameter estimation | 2 | 0 | 4 | 12 |
| 691 | Roads | 1 | 0 | 1407 | 2310 |
| 691 | South America | 1 | 0 | 303 | 503 |
| 691 | Decision making | 1 | 0 | 3214 | 5359 |
| 691 | Business communication | 1 | 0 | 340 | 658 |
