| 1 | Materials | 1,117 | 44.3K | 124 | 163 |
| 2 | Chemical Engineering | 828 | 37.7K | 79 | 85 |
| 3 | Chemistry | 751 | 35.1K | 517 | 519 |
| 4 | Nanotechnology | 567 | 28.4K | 163 | 184 |
| 5 | Biochemical Engineering | 457 | 25.6K | 55 | 97 |
| 6 | Pollution | 424 | 22.0K | 176 | 224 |
| 7 | Materials Science | 494 | 20.3K | 159 | 184 |
| 8 | Ecology | 308 | 20.1K | 447 | 402 |
| 9 | Environment | 244 | 18.8K | 326 | 293 |
| 10 | Optical materials | 383 | 18.0K | 55 | 76 |
| 11 | Catalysis | 291 | 17.6K | 257 | 195 |
| 12 | Environmental Health | 295 | 15.6K | 242 | 238 |
| 13 | Environmental Management | 196 | 14.7K | 56 | 18 |
| 14 | Biocompatible Materials | 336 | 14.6K | 170 | 227 |
| 15 | Automation | 256 | 14.1K | 72 | 83 |
| 16 | Artificial Intelligence | 381 | 13.8K | 61 | 112 |
| 17 | Systems Engineering | 273 | 13.5K | 22 | 6 |
| 18 | Nanostructured Materials | 262 | 12.8K | 135 | 120 |
| 19 | Cybernetics | 175 | 12.7K | 29 | 23 |
| 20 | Water pollution | 145 | 12.5K | 168 | 82 |
| 21 | Environmental Policy | 128 | 12.4K | 206 | 108 |
| 22 | Water | 149 | 11.6K | 151 | 113 |
| 23 | Building Materials | 200 | 11.4K | 52 | 49 |
| 24 | environmental pollution | 277 | 11.3K | 171 | 206 |
| 25 | Physics | 482 | 11.3K | 715 | 1124 |
| 26 | Environmental Engineering | 168 | 11.3K | 213 | 184 |
| 27 | Wireless Communication Systems | 275 | 11.0K | 72 | 77 |
| 28 | Composite Materials | 226 | 10.7K | 125 | 127 |
| 29 | Signal Processing | 332 | 10.1K | 83 | 149 |
| 30 | nanoscience | 179 | 9.9K | 169 | 189 |
| 31 | sanitation | 109 | 9.1K | 120 | 124 |
| 32 | Science | 139 | 9.0K | 1293 | 1171 |
| 33 | Polymers | 371 | 8.9K | 266 | 347 |
| 34 | Colloids | 272 | 8.1K | 209 | 294 |
| 35 | fuel cells | 129 | 7.8K | 54 | 77 |
| 36 | Environmental monitoring | 167 | 7.8K | 187 | 201 |
| 37 | Surface Chemistry | 266 | 7.8K | 204 | 271 |
| 38 | polymerization | 310 | 7.7K | 226 | 294 |
| 39 | Optics | 500 | 7.6K | 186 | 255 |
| 40 | energy conservation | 152 | 7.5K | 64 | 113 |
| 41 | Biology | 122 | 7.2K | 1267 | 1290 |
| 42 | Neural circuitry | 270 | 7.2K | 32 | 50 |
| 43 | Energy Conversion | 113 | 6.9K | 65 | 126 |
| 44 | Analytical Chemistry | 235 | 6.7K | 323 | 383 |
| 45 | Green Chemistry | 144 | 6.5K | 58 | 94 |
| 46 | Telecommunication | 133 | 6.5K | 220 | 194 |
| 47 | Manufacturing Processes | 226 | 6.5K | 76 | 82 |
| 48 | computer networks | 139 | 6.1K | 128 | 91 |
| 49 | Renewable Energy Sources | 96 | 6.0K | 207 | 276 |
| 50 | Image Processing | 207 | 5.9K | 82 | 159 |
| 51 | Nanoparticles | 132 | 5.6K | 75 | 88 |
| 52 | Energy Policy | 139 | 5.5K | 128 | 208 |
| 53 | Electrochemistry | 236 | 5.4K | 359 | 364 |
| 54 | Structural Engineering | 131 | 5.3K | 123 | 90 |
| 55 | Biomass Energy | 99 | 5.2K | 168 | 208 |
| 56 | Heat Exchangers | 123 | 4.9K | 40 | 39 |
| 57 | internet | 119 | 4.8K | 53 | 57 |
| 58 | Photonics | 173 | 4.7K | 122 | 208 |
| 59 | Internet of Things | 119 | 4.7K | 46 | 53 |
| 60 | Earthquake Engineering | 95 | 4.5K | 141 | 109 |
| 61 | Information Science | 164 | 4.5K | 73 | 144 |
| 62 | Ocean Engineering | 96 | 4.4K | 169 | 113 |
| 63 | Sustainable Engineering | 86 | 3.8K | 85 | 99 |
| 64 | Magnetic Materials | 127 | 3.8K | 68 | 82 |
| 65 | Biomedical Engineering | 189 | 3.7K | 405 | 645 |
| 66 | Energy Storage | 99 | 3.7K | 47 | 79 |
| 67 | Production Engineering | 176 | 3.7K | 67 | 75 |
| 68 | Nervous system | 82 | 3.6K | 314 | 338 |
| 69 | Environmental Chemistry | 35 | 3.6K | 372 | 269 |
| 70 | Industrial Engineering | 125 | 3.6K | 80 | 106 |
| 71 | Biochemistry | 142 | 3.5K | 1404 | 1576 |
| 72 | Robotics | 93 | 3.5K | 118 | 107 |
| 73 | environmental protection | 91 | 3.1K | 326 | 414 |
| 74 | Luminescence | 116 | 3.1K | 15 | 11 |
| 75 | China | 172 | 3.0K | 144 | 172 |
| 76 | Metals | 52 | 2.9K | 365 | 278 |
| 77 | Control Theory | 162 | 2.8K | 73 | 152 |
| 78 | Carbon | 47 | 2.8K | 158 | 177 |
| 79 | Biotechnology | 85 | 2.7K | 1002 | 1206 |
| 80 | Metallurgy | 52 | 2.7K | 425 | 300 |
| 81 | Evolutionary Computation | 35 | 2.6K | 42 | 65 |
| 82 | lasers | 172 | 2.5K | 108 | 171 |
| 83 | Statistical physics | 78 | 2.5K | 730 | 647 |
| 84 | Bioengineering | 81 | 2.5K | 645 | 910 |
| 85 | Toxicology | 68 | 2.4K | 871 | 827 |
| 86 | Information Technology | 59 | 2.4K | 223 | 252 |
| 87 | Ceramic materials | 95 | 2.4K | 63 | 87 |
| 88 | Electronics | 137 | 2.3K | 356 | 490 |
| 89 | Mathematics | 276 | 2.3K | 637 | 840 |
| 89 | Research | 101 | 2.3K | 1391 | 1565 |
| 91 | Engineering | 121 | 2.3K | 375 | 451 |
| 92 | Geophysics | 55 | 2.2K | 831 | 718 |
| 93 | Solar Energy | 50 | 2.1K | 171 | 170 |
| 94 | Ceramics | 86 | 2.0K | 105 | 142 |
| 95 | Semiconductors | 85 | 2.0K | 167 | 141 |
| 96 | management | 60 | 2.0K | 664 | 804 |
| 97 | Molecular Biology | 78 | 2.0K | 1573 | 1865 |
| 98 | Intelligent Transportation Systems | 64 | 2.0K | 87 | 142 |
| 99 | Detectors | 94 | 2.0K | 62 | 95 |
| 100 | Genetic algorithms | 18 | 1.9K | 66 | 73 |
| 101 | coal | 63 | 1.8K | 175 | 269 |
| 102 | Power Electronics | 66 | 1.8K | 140 | 228 |
| 103 | Energy Harvesting | 15 | 1.8K | 134 | 108 |
| 104 | Multimedia Systems | 118 | 1.8K | 61 | 132 |
| 105 | mass transfer | 70 | 1.7K | 184 | 289 |
| 106 | solar power | 37 | 1.7K | 62 | 70 |
| 106 | solar cells | 37 | 1.7K | 77 | 91 |
| 108 | Mechatronics | 58 | 1.7K | 58 | 79 |
| 109 | System analysis | 81 | 1.7K | 223 | 327 |
| 110 | Technology | 108 | 1.6K | 435 | 691 |
| 111 | Marine Biology | 20 | 1.6K | 1004 | 553 |
| 112 | Environmental Toxicology | 38 | 1.6K | 465 | 479 |
| 113 | Communication | 22 | 1.5K | 674 | 386 |
| 114 | Pharmaceutical Chemistry | 54 | 1.5K | 795 | 851 |
| 115 | Food | 38 | 1.5K | 732 | 713 |
| 116 | Mobile Computing | 51 | 1.4K | 116 | 139 |
| 117 | Solid State Physics | 119 | 1.4K | 691 | 951 |
| 118 | Transportation | 25 | 1.4K | 481 | 337 |
| 119 | Organic Chemistry | 66 | 1.4K | 652 | 768 |
| 120 | Electromagnetism | 89 | 1.4K | 48 | 138 |
| 121 | Radio | 54 | 1.4K | 251 | 365 |
| 122 | Electrical Engineering | 105 | 1.3K | 415 | 447 |
| 123 | Medicine | 65 | 1.3K | 2013 | 2462 |
| 124 | Microbiology | 49 | 1.3K | 1531 | 1823 |
| 125 | pollutants | 35 | 1.3K | 318 | 374 |
| 125 | Environmental pollutants | 35 | 1.3K | 431 | 444 |
| 127 | environmental exposure | 37 | 1.3K | 306 | 320 |
| 128 | Glass | 61 | 1.2K | 112 | 194 |
| 128 | pottery | 61 | 1.2K | 113 | 189 |
| 130 | Solid State Chemistry | 88 | 1.2K | 311 | 499 |
| 131 | Microwaves | 81 | 1.2K | 173 | 226 |
| 132 | Environmental Law | 20 | 1.2K | 288 | 355 |
| 133 | Nutrition | 27 | 1.2K | 1295 | 1137 |
| 134 | actuators | 54 | 1.1K | 353 | 597 |
| 134 | transducers | 54 | 1.1K | 353 | 597 |
| 136 | Agricultural Chemistry | 35 | 1.1K | 478 | 518 |
| 137 | Bioorganic chemistry | 44 | 1.1K | 650 | 760 |
| 138 | Pharmacology | 61 | 1.1K | 1125 | 1425 |
| 139 | multimedia | 41 | 1.1K | 58 | 93 |
| 139 | Interactive multimedia | 41 | 1.1K | 60 | 93 |
| 141 | Telecommunication Systems | 51 | 1.1K | 148 | 150 |
| 141 | Fiber Optics | 70 | 1.1K | 90 | 167 |
| 143 | Dynamics | 39 | 1.1K | 253 | 149 |
| 144 | Membranes | 34 | 1.1K | 452 | 582 |
| 145 | vibration | 24 | 1.1K | 299 | 227 |
| 146 | Recycling | 26 | 1.1K | 73 | 158 |
| 147 | Radio waves | 46 | 1.0K | 161 | 233 |
| 148 | Nanostructures | 36 | 1.0K | 354 | 538 |
| 149 | concrete | 23 | 1.0K | 247 | 310 |
| 150 | Nuclear Physics | 35 | 1.0K | 1533 | 1371 |
| 151 | Microelectronics | 35 | 1.0K | 413 | 550 |
| 151 | pigments | 65 | 1.0K | 39 | 92 |
| 153 | Nonlinear Dynamics | 19 | 1.0K | 852 | 581 |
| 154 | Boundary Value Problems | 77 | 1.0K | 27 | 103 |
| 155 | miniaturization | 32 | 1.0K | 441 | 634 |
| 156 | Antenna Arrays | 71 | 993 | 26 | 98 |
| 157 | Measurement | 40 | 988 | 180 | 178 |
| 158 | Geochemistry | 18 | 977 | 813 | 653 |
| 159 | Structural dynamics | 19 | 975 | 351 | 299 |
| 160 | Operations Research | 57 | 926 | 400 | 636 |
| 161 | Geomagnetism | 11 | 907 | 297 | 137 |
| 162 | Biosensors | 19 | 890 | 397 | 473 |
| 163 | Computer Science | 36 | 875 | 336 | 261 |
| 164 | ecosystem | 9 | 874 | 696 | 444 |
| 165 | Nonlinear systems | 49 | 865 | 39 | 83 |
| 166 | sustainability | 18 | 839 | 198 | 253 |
| 167 | Economics | 31 | 833 | 1371 | 1159 |
| 168 | Mechanical Engineering | 80 | 831 | 294 | 480 |
| 169 | Planets | 16 | 816 | 648 | 624 |
| 170 | Biophysics | 40 | 812 | 1556 | 1824 |
| 171 | food technology | 35 | 802 | 626 | 833 |
| 172 | Marine Ecology | 3 | 791 | 755 | 118 |
| 173 | Marine Pollution | 12 | 776 | 540 | 380 |
| 174 | Optical Communications | 40 | 764 | 83 | 98 |
| 175 | Computational Intelligence | 40 | 758 | 34 | 57 |
| 176 | Nanochemistry | 36 | 746 | 111 | 152 |
| 177 | Clinical Chemistry | 20 | 743 | 926 | 886 |
| 178 | Light | 5 | 738 | 677 | 482 |
| 179 | Bioelectronics | 14 | 730 | 411 | 491 |
| 180 | Lightweight concrete | 9 | 710 | 187 | 184 |
| 181 | clay | 24 | 705 | 130 | 198 |
| 182 | Diet | 11 | 700 | 895 | 797 |
| 183 | Swarm Intelligence | 18 | 694 | 32 | 61 |
| 184 | Mathematical Physics | 22 | 689 | 1170 | 865 |
| 185 | Fuzzy systems | 57 | 674 | 108 | 204 |
| 186 | Combustion | 33 | 668 | 289 | 372 |
| 187 | Process Control | 13 | 666 | 359 | 427 |
| 188 | Ultrasonics | 22 | 664 | 307 | 378 |
| 189 | Production Management | 11 | 631 | 551 | 589 |
| 190 | Pharmaceutical Technology | 20 | 626 | 467 | 506 |
| 190 | Bifurcation Theory | 6 | 626 | 127 | 24 |
| 192 | energy resources | 9 | 605 | 750 | 739 |
| 193 | environmental indicators | 32 | 601 | 121 | 398 |
| 194 | Systems Analysis | 36 | 599 | 124 | 198 |
| 194 | Bioinformatics | 35 | 599 | 443 | 725 |
| 196 | Plastics | 34 | 592 | 311 | 431 |
| 197 | health planning | 40 | 584 | 382 | 554 |
| 198 | Sustainable Development | 14 | 576 | 765 | 753 |
| 199 | Logistics | 11 | 575 | 193 | 177 |
| 200 | Product Design | 44 | 570 | 76 | 92 |
| 201 | Computational Biology | 29 | 569 | 624 | 893 |
| 202 | Surface-Active Agents | 24 | 562 | 186 | 362 |
| 202 | Surface properties | 24 | 562 | 208 | 405 |
| 204 | radioactive waste | 14 | 553 | 225 | 385 |
| 204 | industrial waste | 14 | 553 | 248 | 388 |
| 204 | Hazardous waste | 14 | 553 | 293 | 410 |
| 207 | Condensed Matter | 40 | 549 | 1009 | 1270 |
| 208 | Numerical Analysis | 50 | 546 | 423 | 659 |
| 209 | Human-Computer Interaction | 15 | 545 | 534 | 478 |
| 209 | Cancer | 19 | 545 | 1074 | 1269 |
| 211 | soil conservation | 16 | 526 | 175 | 178 |
| 212 | Adaptive control systems | 40 | 525 | 39 | 77 |
| 212 | Chemical industry | 30 | 525 | 261 | 261 |
| 214 | Astronomy | 18 | 524 | 1206 | 1262 |
| 214 | Technological Innovations | 13 | 524 | 335 | 316 |
| 216 | Quantum electronics | 44 | 520 | 287 | 458 |
| 217 | Entrepreneurship | 2 | 517 | 1241 | 521 |
| 218 | Computer Graphics | 44 | 510 | 312 | 597 |
| 219 | Industrial Safety | 10 | 506 | 531 | 327 |
| 219 | rehabilitation | 18 | 506 | 754 | 777 |
| 221 | Entropy | 38 | 487 | 78 | 151 |
| 222 | Cognitive Radio Networks | 15 | 483 | 37 | 45 |
| 223 | Hydrology | 33 | 478 | 617 | 968 |
| 224 | Nonlinear functional analysis | 28 | 474 | 223 | 279 |
| 225 | catalytic activity | 14 | 473 | 219 | 249 |
| 226 | population geography | 2 | 470 | 484 | 84 |
| 227 | soil microbiology | 9 | 448 | 788 | 864 |
| 228 | Business | 12 | 442 | 1078 | 1188 |
| 229 | finance | 21 | 439 | 843 | 904 |
| 230 | Cognitive Science | 13 | 438 | 644 | 702 |
| 231 | Cell death | 8 | 437 | 630 | 644 |
| 232 | Soil Science | 10 | 436 | 985 | 855 |
| 233 | Small Business | 2 | 427 | 884 | 519 |
| 233 | mathematical analysis | 65 | 427 | 490 | 834 |
| 235 | Tunneling | 15 | 420 | 102 | 167 |
| 235 | underground construction | 15 | 420 | 102 | 167 |
| 237 | Microbial Ecology | 15 | 414 | 917 | 1263 |
| 238 | Decision making | 11 | 411 | 654 | 562 |
| 239 | Pharmacognosy | 16 | 407 | 717 | 919 |
| 240 | soil pollution | 10 | 406 | 153 | 93 |
| 241 | Smart Materials | 24 | 405 | 187 | 334 |
| 242 | energy development | 10 | 403 | 305 | 418 |
| 243 | Spectrum analysis | 31 | 393 | 1487 | 1965 |
| 244 | Computational Complexity | 25 | 388 | 136 | 176 |
| 245 | Tribology | 22 | 387 | 334 | 424 |
| 246 | Physical organic chemistry | 17 | 383 | 550 | 551 |
| 247 | Quality Control | 14 | 381 | 598 | 682 |
| 248 | Asia | 30 | 372 | 630 | 840 |
| 249 | Organometallic chemistry | 27 | 369 | 579 | 753 |
| 250 | global environmental change | 5 | 366 | 556 | 460 |
| 251 | Structural design | 21 | 362 | 180 | 309 |
| 251 | Zeolites | 19 | 362 | 249 | 451 |
| 253 | Japan | 7 | 355 | 1098 | 504 |
| 254 | Cellulose | 10 | 352 | 230 | 241 |
| 255 | Medical Laboratory Science | 10 | 350 | 996 | 1100 |
| 256 | food handling | 15 | 344 | 247 | 440 |
| 257 | Ultrasound | 14 | 342 | 268 | 287 |
| 258 | Environmental Geology | 17 | 338 | 563 | 794 |
| 259 | Soil dynamics | 11 | 328 | 205 | 203 |
| 259 | Water quality management | 23 | 328 | 500 | 704 |
| 261 | Computer Vision | 29 | 326 | 231 | 643 |
| 262 | Radiography | 8 | 322 | 385 | 499 |
| 262 | Sonochemistry | 8 | 322 | 289 | 405 |
| 264 | Analytical Biochemistry | 21 | 314 | 479 | 771 |
| 265 | Tourism | 11 | 308 | 797 | 1051 |
| 266 | Nondestructive testing | 15 | 305 | 192 | 242 |
| 267 | natural products | 16 | 301 | 691 | 754 |
| 268 | Cell Biology | 14 | 299 | 1619 | 2081 |
| 269 | Food additives | 5 | 288 | 794 | 674 |
| 269 | Chemical analysis | 12 | 288 | 455 | 583 |
| 269 | hydrocolloids | 5 | 288 | 455 | 496 |
| 272 | city planning | 14 | 286 | 668 | 765 |
| 273 | Psychology | 19 | 282 | 1899 | 2219 |
| 274 | Civil Engineering | 17 | 280 | 523 | 405 |
| 275 | optical devices | 19 | 278 | 69 | 143 |
| 276 | Solitons | 18 | 276 | 305 | 525 |
| 276 | Fractals | 18 | 276 | 307 | 528 |
| 276 | Chaos | 18 | 276 | 305 | 525 |
| 279 | Actuarial Science | 8 | 270 | 121 | 89 |
| 279 | insurance | 8 | 270 | 181 | 119 |
| 281 | Molecular Spectroscopy | 16 | 269 | 723 | 927 |
| 282 | economic policy | 9 | 268 | 1375 | 924 |
| 283 | Public Health | 5 | 267 | 3598 | 2580 |
| 284 | Immunotherapy | 14 | 260 | 694 | 1056 |
| 284 | Immunopharmacology | 14 | 260 | 340 | 521 |
| 284 | cytokines | 14 | 260 | 408 | 707 |
| 287 | Soil biology | 1 | 258 | 1248 | 697 |
| 288 | Sociology | 11 | 257 | 1523 | 1470 |
| 289 | Social Change | 10 | 256 | 456 | 839 |
| 290 | Environmental risk assessment | 2 | 254 | 528 | 113 |
| 290 | environmental control | 2 | 254 | 242 | 71 |
| 292 | Bioremediation | 10 | 253 | 275 | 430 |
| 292 | Biodegradation | 10 | 253 | 252 | 406 |
| 292 | Cognitive neuroscience | 8 | 253 | 556 | 653 |
| 295 | Electrochemical Analysis | 16 | 251 | 637 | 880 |
| 296 | genome | 5 | 249 | 990 | 1003 |
| 297 | Fracture mechanics | 13 | 247 | 666 | 758 |
| 297 | Radio wave propagation | 18 | 247 | 206 | 258 |
| 299 | biopolymers | 15 | 242 | 457 | 665 |
| 300 | Earth Sciences | 10 | 241 | 1816 | 1791 |
| 301 | Agricultural Engineering | 2 | 239 | 538 | 223 |
| 302 | Urban Policy | 8 | 236 | 432 | 483 |
| 303 | Biomass | 5 | 235 | 468 | 473 |
| 303 | Developing countries | 11 | 235 | 1123 | 1224 |
| 305 | Information Theory | 10 | 234 | 748 | 757 |
| 305 | Chromatographic analysis | 15 | 234 | 741 | 872 |
| 307 | Remote Sensing | 15 | 231 | 565 | 642 |
| 308 | infrared radiation | 20 | 230 | 102 | 162 |
| 309 | Electrophoresis | 15 | 228 | 630 | 902 |
| 309 | Chromatography | 14 | 228 | 660 | 795 |
| 311 | Soft Condensed Matter | 14 | 226 | 453 | 623 |
| 312 | Pharmacy | 13 | 225 | 920 | 1190 |
| 313 | Land use | 12 | 223 | 460 | 727 |
| 314 | biological factors | 11 | 222 | 942 | 1066 |
| 315 | Investment analysis | 12 | 219 | 294 | 462 |
| 315 | Molecular structure | 13 | 219 | 1149 | 1304 |
| 317 | United States | 9 | 218 | 2780 | 2557 |
| 318 | Medical Physics | 14 | 217 | 673 | 938 |
| 318 | Simulation Methods | 7 | 217 | 585 | 438 |
| 318 | proteins | 14 | 217 | 846 | 1127 |
| 321 | Industrial Microbiology | 8 | 215 | 1127 | 1379 |
| 322 | Bioinorganic chemistry | 6 | 209 | 998 | 859 |
| 322 | Neuroplasticity | 6 | 209 | 104 | 128 |
| 322 | human development | 6 | 209 | 548 | 544 |
| 325 | Food service management | 5 | 208 | 277 | 397 |
| 326 | Photochemistry | 14 | 206 | 713 | 1040 |
| 327 | Medicinal plants | 10 | 205 | 659 | 1030 |
| 328 | Industrial Design | 9 | 204 | 84 | 124 |
| 328 | Food Microbiology | 12 | 204 | 510 | 995 |
| 330 | Ultrasonic Imaging | 8 | 200 | 250 | 263 |
| 331 | Cytology | 11 | 197 | 1886 | 2444 |
| 331 | Atmospheric Physics | 5 | 197 | 1112 | 1044 |
| 333 | Energy Consumption | 7 | 195 | 186 | 326 |
| 334 | Economic History | 9 | 194 | 1873 | 1638 |
| 335 | Linguistics | 6 | 191 | 928 | 644 |
| 336 | Thermodynamics | 23 | 190 | 277 | 485 |
| 336 | International Finance | 8 | 190 | 1064 | 1096 |
| 338 | Visual Communication | 14 | 187 | 79 | 151 |
| 338 | Image enhancement | 14 | 187 | 65 | 140 |
| 340 | Business Ethics | 3 | 185 | 988 | 999 |
| 341 | Photobiology | 12 | 181 | 553 | 894 |
| 342 | Ubiquitous computing | 5 | 180 | 147 | 37 |
| 342 | Metallography | 12 | 180 | 330 | 503 |
| 342 | Imaging systems | 33 | 180 | 53 | 255 |
| 342 | carbon monoxide | 8 | 180 | 117 | 271 |
| 346 | Catalysts | 16 | 179 | 161 | 382 |
| 347 | Speech-Language Pathology | 4 | 176 | 219 | 128 |
| 347 | automatic speech recognition | 4 | 176 | 90 | 70 |
| 347 | Microstructure | 16 | 176 | 228 | 344 |
| 350 | Meteorology | 4 | 175 | 1690 | 1602 |
| 350 | structural stability | 8 | 175 | 161 | 250 |
| 350 | Drug delivery systems | 11 | 175 | 730 | 1186 |
| 350 | atmosphere | 4 | 175 | 632 | 545 |
| 354 | Ecological Engineering | 8 | 172 | 293 | 570 |
| 354 | Neurochemistry | 7 | 172 | 1390 | 1503 |
| 354 | Natural history | 6 | 172 | 2145 | 3074 |
| 357 | Engineering Geology | 12 | 170 | 661 | 992 |
| 358 | Sound | 7 | 168 | 657 | 544 |
| 359 | Geography | 8 | 166 | 1210 | 1349 |
| 359 | Diagnostic Imaging | 26 | 166 | 480 | 1072 |
| 359 | water supply | 6 | 166 | 566 | 698 |
| 362 | Economic Development | 3 | 165 | 1503 | 1173 |
| 363 | Atmospheric Chemistry | 4 | 163 | 716 | 780 |
| 363 | Industrial Ecology | 4 | 163 | 130 | 166 |
| 365 | Computer Engineering | 11 | 161 | 342 | 483 |
| 366 | Physiology | 6 | 160 | 2532 | 2622 |
| 367 | Behavior | 7 | 159 | 1898 | 2405 |
| 368 | Soil Mechanics | 14 | 158 | 466 | 769 |
| 368 | Radiation | 11 | 158 | 1086 | 1245 |
| 370 | probabilities | 12 | 157 | 695 | 656 |
| 371 | Public Policy | 2 | 156 | 1977 | 1231 |
| 371 | Proteome | 7 | 156 | 660 | 871 |
| 373 | commerce | 15 | 155 | 561 | 1064 |
| 374 | Botany | 11 | 154 | 1999 | 2657 |
| 375 | Waste management | 14 | 152 | 515 | 838 |
| 376 | Information Systems | 6 | 151 | 951 | 995 |
| 377 | Metallic Glasses | 10 | 149 | 183 | 312 |
| 377 | particles | 14 | 149 | 302 | 659 |
| 377 | Biodiversity | 9 | 149 | 1216 | 1549 |
| 380 | human behavior | 5 | 148 | 1761 | 2180 |
| 380 | Marine resources | 6 | 148 | 412 | 475 |
| 382 | Differential Equations | 16 | 147 | 396 | 622 |
| 382 | Ferroelectricity | 9 | 147 | 579 | 471 |
| 384 | Coastal zone management | 5 | 146 | 486 | 494 |
| 384 | Quality of life | 6 | 146 | 947 | 1159 |
| 386 | Structural health monitoring | 6 | 145 | 112 | 176 |
| 387 | Computer-Aided Design | 16 | 144 | 403 | 809 |
| 387 | Environmental Geochemistry | 10 | 144 | 135 | 309 |
| 387 | Minerals | 10 | 144 | 277 | 521 |
| 390 | Data Mining | 14 | 143 | 577 | 1258 |
| 390 | Environmental Microbiology | 6 | 143 | 886 | 1279 |
| 390 | Climate change | 4 | 143 | 789 | 1229 |
| 390 | land degradation | 8 | 143 | 196 | 386 |
| 390 | degradation | 8 | 143 | 196 | 386 |
| 395 | Radiology | 6 | 142 | 858 | 730 |
| 395 | cosmic rays | 6 | 142 | 271 | 235 |
| 395 | cell physiology | 4 | 142 | 1106 | 1213 |
| 395 | Radio frequency | 6 | 142 | 286 | 307 |
| 399 | Social Psychology | 7 | 141 | 1409 | 1621 |
| 400 | Cloud Computing | 6 | 140 | 153 | 255 |
| 401 | marketing | 9 | 136 | 1158 | 1542 |
| 401 | economic analysis | 2 | 136 | 318 | 161 |
| 401 | Australia | 2 | 136 | 2122 | 1100 |
| 404 | Health Information Management | 1 | 135 | 661 | 565 |
| 405 | Fluid Dynamics | 7 | 134 | 699 | 794 |
| 405 | Risk Management | 5 | 134 | 449 | 490 |
| 405 | Happiness | 5 | 134 | 273 | 376 |
| 405 | Therapeutics | 5 | 134 | 1066 | 1173 |
| 409 | Geomorphology | 9 | 132 | 818 | 1241 |
| 410 | Rock Mechanics | 8 | 131 | 530 | 725 |
| 411 | Water Purification | 12 | 128 | 465 | 756 |
| 412 | Engineering Mathematics | 24 | 127 | 528 | 1117 |
| 413 | Central Asia | 9 | 126 | 25 | 84 |
| 414 | Geodynamics | 2 | 125 | 949 | 756 |
| 415 | Intelligent Control Systems | 19 | 124 | 254 | 486 |
| 416 | Drug design | 6 | 123 | 993 | 1232 |
| 417 | Adhesion | 8 | 121 | 321 | 455 |
| 417 | adhesives | 8 | 121 | 343 | 460 |
| 419 | Oceanography | 10 | 119 | 923 | 1310 |
| 420 | child abuse | 2 | 114 | 932 | 769 |
| 421 | machinery | 10 | 113 | 357 | 570 |
| 421 | Soil ecology | 4 | 113 | 642 | 789 |
| 423 | Architectural Design | 3 | 112 | 462 | 237 |
| 424 | Functional Analysis | 16 | 110 | 592 | 935 |
| 424 | Taste | 2 | 110 | 380 | 230 |
| 424 | flavor | 2 | 110 | 245 | 156 |
| 424 | smell | 2 | 110 | 380 | 230 |
| 428 | Social Sciences | 9 | 109 | 1982 | 2245 |
| 428 | microwave antennas | 10 | 109 | 135 | 190 |
| 430 | Biodiversity conservation | 4 | 108 | 1291 | 1622 |
| 430 | Eutrophication | 3 | 108 | 858 | 1311 |
| 432 | Europe | 4 | 107 | 2374 | 1971 |
| 433 | Statistics | 9 | 106 | 1532 | 1602 |
| 433 | Herbal medicine | 2 | 106 | 903 | 826 |
| 433 | natural gas | 3 | 106 | 342 | 340 |
| 436 | Epidemiology | 2 | 105 | 3380 | 2571 |
| 436 | Probability | 3 | 105 | 574 | 478 |
| 436 | Financial management | 3 | 105 | 458 | 514 |
| 436 | Risk | 3 | 105 | 504 | 504 |
| 440 | Plant diseases | 6 | 104 | 1347 | 1472 |
| 441 | Marine Geology | 12 | 103 | 222 | 519 |
| 441 | Marine Geophysics | 11 | 103 | 59 | 163 |
| 441 | Marine mineral resources | 11 | 103 | 33 | 72 |
| 441 | Inflammation | 4 | 103 | 882 | 1103 |
| 441 | Seabed | 11 | 103 | 33 | 72 |
| 446 | Thermochemistry | 7 | 101 | 304 | 404 |
| 446 | Virology | 5 | 101 | 1801 | 2293 |
| 446 | drug evaluation | 6 | 101 | 840 | 1101 |
| 449 | Fluid Mechanics | 11 | 100 | 771 | 1153 |
| 449 | Tissue Engineering | 3 | 100 | 332 | 311 |
| 449 | Mechanics | 9 | 100 | 714 | 907 |
| 452 | micromechanics | 11 | 99 | 242 | 545 |
| 452 | Visual Perception | 3 | 99 | 1256 | 1147 |
| 452 | Perception | 2 | 99 | 1634 | 1285 |
| 455 | Microbial Metabolism | 4 | 98 | 109 | 233 |
| 456 | Geographic information systems | 7 | 97 | 689 | 819 |
| 456 | Wireless Communication | 9 | 97 | 163 | 254 |
| 458 | Bioenergetics | 1 | 96 | 1234 | 857 |
| 458 | Graphene | 1 | 96 | 255 | 162 |
| 460 | Immunology | 5 | 95 | 2002 | 2365 |
| 460 | Flexible electronics | 1 | 95 | 165 | 125 |
| 462 | Optoelectronics | 10 | 94 | 218 | 262 |
| 463 | Crystal growth | 7 | 93 | 659 | 967 |
| 463 | Memory | 1 | 93 | 1975 | 1363 |
| 463 | Attention | 1 | 93 | 1900 | 1221 |
| 466 | Geology | 10 | 92 | 1622 | 2179 |
| 466 | dietary supplements | 5 | 92 | 592 | 905 |
| 468 | free radicals | 2 | 91 | 1359 | 1426 |
| 469 | Geriatrics | 1 | 90 | 3379 | 2076 |
| 469 | Highway Engineering | 4 | 90 | 317 | 308 |
| 469 | Gerontology | 1 | 90 | 2547 | 1324 |
| 469 | Aging | 1 | 90 | 3109 | 1964 |
| 473 | Medical Anthropology | 1 | 89 | 1716 | 1324 |
| 473 | Bacteriology | 7 | 89 | 1102 | 1741 |
| 473 | impact | 3 | 89 | 292 | 380 |
| 476 | Medical Microbiology | 2 | 87 | 2022 | 1985 |
| 477 | Neuropsychology | 4 | 86 | 1735 | 1883 |
| 478 | Dentistry | 1 | 85 | 1065 | 466 |
| 478 | Genetic engineering | 2 | 85 | 2063 | 1838 |
| 478 | Machining | 10 | 85 | 26 | 100 |
| 481 | Biopharmaceutics | 4 | 84 | 865 | 1085 |
| 481 | Algorithms | 9 | 84 | 342 | 550 |
| 481 | electric vehicles | 8 | 84 | 139 | 338 |
| 481 | plasma spraying | 4 | 84 | 178 | 207 |
| 485 | Flexible manufacturing systems | 4 | 83 | 292 | 430 |
| 486 | Genomics | 15 | 81 | 1236 | 2574 |
| 486 | Physical Chemistry | 5 | 81 | 1647 | 1859 |
| 486 | Geodesy | 5 | 81 | 539 | 687 |
| 486 | Microorganisms | 2 | 81 | 1157 | 1199 |
| 490 | innovation | 2 | 80 | 741 | 827 |
| 491 | Microwave devices | 6 | 79 | 326 | 422 |
| 492 | Neurology | 8 | 78 | 2431 | 3509 |
| 492 | Educational Technology | 7 | 78 | 1043 | 1600 |
| 492 | data protection | 4 | 78 | 465 | 439 |
| 495 | Systems Biology | 4 | 77 | 1167 | 1415 |
| 495 | Nuclear Fusion | 7 | 77 | 349 | 448 |
| 495 | Hydrodynamics | 5 | 77 | 442 | 620 |
| 495 | plasticity | 3 | 77 | 326 | 496 |
| 495 | Groundwater | 5 | 77 | 377 | 578 |
| 500 | Oxidative stress | 1 | 76 | 1282 | 1232 |
| 500 | design | 1 | 76 | 477 | 202 |
| 500 | drugs | 4 | 76 | 1566 | 1778 |
| 500 | extraterrestrial environment | 5 | 76 | 406 | 466 |
| 500 | astronomical phenomena | 5 | 76 | 359 | 429 |
| 500 | Oxidation-reduction | 1 | 76 | 1072 | 1049 |
| 506 | synthesis | 7 | 75 | 689 | 815 |
| 507 | Medical Oncology | 1 | 74 | 1815 | 1435 |
| 508 | Electromagnetic compatibility | 4 | 73 | 288 | 311 |
| 509 | Nanoelectronics | 7 | 72 | 477 | 590 |
| 510 | Algebra | 6 | 71 | 1128 | 936 |
| 510 | Powder Metallurgy | 7 | 71 | 80 | 86 |
| 512 | Ergonomics | 3 | 70 | 876 | 862 |
| 512 | air quality management | 7 | 70 | 238 | 619 |
| 514 | Traffic Engineering | 3 | 69 | 429 | 556 |
| 514 | Textile industry | 8 | 69 | 250 | 359 |
| 516 | Cosmochemistry | 3 | 68 | 849 | 992 |
| 517 | Eastern Europe | 8 | 67 | 393 | 548 |
| 518 | Strategic planning | 6 | 66 | 478 | 882 |
| 518 | nucleic acids | 1 | 66 | 1860 | 1586 |
| 520 | Natural resources | 5 | 65 | 548 | 892 |
| 520 | Sleep Disorders | 2 | 65 | 1466 | 1304 |
| 520 | Biomechanics | 8 | 65 | 728 | 1299 |
| 520 | Sleep | 2 | 65 | 1500 | 1324 |
| 524 | Water Microbiology | 1 | 64 | 875 | 575 |
| 524 | Housing | 2 | 64 | 617 | 630 |
| 526 | Education | 2 | 63 | 3873 | 2849 |
| 526 | Geometry | 9 | 63 | 691 | 777 |
| 526 | Signal Transduction | 1 | 63 | 1730 | 1533 |
| 526 | clay minerals | 2 | 63 | 348 | 366 |
| 526 | cell interaction | 1 | 63 | 1364 | 1213 |
| 531 | Hydraulic Engineering | 5 | 62 | 648 | 836 |
| 531 | Granular materials | 5 | 62 | 416 | 800 |
| 533 | World Wide Web | 7 | 61 | 165 | 328 |
| 534 | Mass Spectrometry | 5 | 60 | 852 | 1092 |
| 535 | Structural optimization | 3 | 59 | 338 | 438 |
| 535 | Pharmacokinetics | 1 | 59 | 1240 | 1057 |
| 537 | counseling | 2 | 58 | 1464 | 1232 |
| 538 | Psychiatry | 1 | 57 | 4325 | 3426 |
| 538 | Sustainable Architecture | 5 | 57 | 68 | 117 |
| 538 | Clinical Psychology | 1 | 57 | 1591 | 1284 |
| 538 | Integrated Circuits | 14 | 57 | 277 | 514 |
| 538 | data collection | 3 | 57 | 1062 | 1318 |
| 538 | Investments | 5 | 57 | 324 | 527 |
| 544 | Combinatorial optimization | 6 | 56 | 291 | 361 |
| 544 | Stem cells | 1 | 56 | 1562 | 1414 |
| 546 | Plant Genetics | 1 | 55 | 1030 | 926 |
| 546 | Political Sociology | 1 | 55 | 790 | 492 |
| 546 | phenomics | 1 | 55 | 66 | 44 |
| 549 | Pathology | 3 | 54 | 1525 | 1887 |
| 549 | Embedded Systems | 3 | 54 | 201 | 220 |
| 549 | Oral Medicine | 2 | 54 | 875 | 700 |
| 549 | Anti-inflammatory agents | 3 | 54 | 225 | 313 |
| 549 | Sensor Networks | 9 | 54 | 70 | 260 |
| 554 | Mineral resources | 3 | 53 | 645 | 989 |
| 555 | Nuclear Engineering | 5 | 52 | 1119 | 1260 |
| 555 | Clinical Biochemistry | 1 | 52 | 1524 | 1177 |
| 555 | Leadership | 2 | 52 | 689 | 823 |
| 555 | East Asia | 4 | 52 | 510 | 558 |
| 555 | organization | 2 | 52 | 983 | 1090 |
| 560 | Enzyme inhibitors | 2 | 51 | 530 | 561 |
| 560 | Semiconductor industry | 4 | 51 | 482 | 570 |
| 562 | Dermatology | 5 | 50 | 1088 | 1430 |
| 562 | Corporate Social Responsibility | 4 | 50 | 207 | 702 |
| 562 | Laser therapy | 5 | 50 | 281 | 426 |
| 562 | environmental auditing | 4 | 50 | 219 | 710 |
| 566 | Materials Engineering | 7 | 49 | 374 | 760 |
| 567 | Functional foods | 1 | 48 | 699 | 573 |
| 567 | Industrial Policy | 2 | 48 | 612 | 625 |
| 567 | research and development | 1 | 48 | 599 | 519 |
| 567 | Phytotherapy | 1 | 48 | 1225 | 995 |
| 567 | Muscle contraction | 7 | 48 | 135 | 188 |
| 572 | Endocrinology | 1 | 47 | 2971 | 2683 |
| 572 | Landscape Ecology | 1 | 47 | 723 | 723 |
| 572 | Heterocyclic chemistry | 4 | 47 | 425 | 448 |
| 572 | Asymmetric synthesis | 3 | 47 | 82 | 94 |
| 572 | Hormones | 1 | 47 | 1548 | 1365 |
| 572 | peptides | 3 | 47 | 774 | 903 |
| 572 | food industry | 2 | 47 | 1014 | 951 |
| 579 | Vocational Education | 1 | 46 | 849 | 594 |
| 579 | Medical genetics | 3 | 46 | 1702 | 2345 |
| 579 | Telecommunications | 12 | 46 | 228 | 871 |
| 579 | big data | 5 | 46 | 397 | 832 |
| 579 | Vocational guidance | 1 | 46 | 1389 | 1124 |
| 584 | Plant hormones | 1 | 45 | 584 | 531 |
| 584 | Cement | 3 | 45 | 551 | 911 |
| 584 | freshwater biology | 6 | 45 | 595 | 1146 |
| 587 | consumer behavior | 5 | 44 | 381 | 890 |
| 587 | Cell differentiation | 1 | 44 | 1640 | 1731 |
| 587 | bioluminescence | 8 | 44 | 125 | 357 |
| 587 | aromatic plants | 4 | 44 | 180 | 198 |
| 591 | Database Management | 5 | 43 | 588 | 918 |
| 591 | Health Policy | 1 | 43 | 2868 | 2230 |
| 591 | Mental Health | 1 | 43 | 2289 | 1752 |
| 591 | Nanophotonics | 1 | 43 | 558 | 530 |
| 591 | mental health policy | 1 | 43 | 323 | 265 |
| 591 | textile fibers | 6 | 43 | 240 | 481 |
| 597 | Humanities | 7 | 42 | 1142 | 1785 |
| 597 | Urban Planning | 1 | 42 | 702 | 641 |
| 597 | community development | 1 | 42 | 1025 | 773 |
| 597 | Quantum Optics | 8 | 42 | 530 | 967 |
| 597 | Library Science | 2 | 42 | 1176 | 861 |
| 597 | Reproduction | 1 | 42 | 2500 | 2134 |
| 597 | Atomic spectroscopy | 8 | 42 | 688 | 1229 |
| 597 | Ore deposits | 2 | 42 | 619 | 694 |
| 597 | Population | 1 | 42 | 1404 | 1175 |
| 597 | Laser Spectroscopy | 8 | 42 | 482 | 924 |
| 607 | Sintering | 4 | 41 | 26 | 30 |
| 607 | Group decision making | 1 | 41 | 820 | 645 |
| 607 | Plants | 3 | 41 | 1901 | 2328 |
| 610 | Clinical Immunology | 1 | 40 | 1218 | 1202 |
| 610 | Immunopathology | 1 | 40 | 1360 | 1294 |
| 610 | Urban Transportation | 2 | 40 | 168 | 162 |
| 610 | Friction | 2 | 40 | 148 | 263 |
| 610 | biological evolution | 3 | 40 | 1798 | 2518 |
| 610 | Evolution | 3 | 40 | 1635 | 2147 |
| 610 | fusion reactors | 3 | 40 | 378 | 374 |
| 610 | econometric models | 3 | 40 | 657 | 952 |
| 610 | natural disasters | 4 | 40 | 1125 | 1817 |
| 610 | environmental issues | 1 | 40 | 788 | 754 |
| 620 | Molecular Pharmacology | 4 | 39 | 653 | 1182 |
| 620 | Risk assessment | 3 | 39 | 624 | 853 |
| 620 | ecological risk assessment | 3 | 39 | 222 | 434 |
| 620 | microwave communication systems | 4 | 39 | 335 | 492 |
| 620 | Health Risk Assessment | 3 | 39 | 438 | 670 |
| 625 | Zoology | 1 | 38 | 3155 | 2433 |
| 625 | Physical Geography | 3 | 38 | 489 | 704 |
| 625 | Neurotoxicology | 1 | 38 | 961 | 1003 |
| 625 | Brain-Computer Interfaces | 4 | 38 | 10 | 60 |
| 625 | Apoptosis | 1 | 38 | 516 | 527 |
| 625 | neurotoxins | 1 | 38 | 516 | 527 |
| 625 | Neurotoxic agents | 1 | 38 | 516 | 527 |
| 625 | Animal ecology | 1 | 38 | 1559 | 1365 |
| 625 | Chromosome mapping | 5 | 38 | 1212 | 2211 |
| 625 | indoor air pollution | 4 | 38 | 285 | 609 |
| 625 | Ventilation | 4 | 38 | 399 | 719 |
| 625 | Sick building syndrome | 4 | 38 | 285 | 609 |
| 625 | gene mapping | 5 | 38 | 1312 | 2381 |
| 625 | Nerve regeneration | 1 | 38 | 516 | 527 |
| 639 | Diabetes mellitus | 1 | 37 | 2190 | 2125 |
| 639 | Greenhouse gases | 1 | 37 | 476 | 561 |
| 639 | Diabetes | 1 | 37 | 2222 | 2140 |
| 642 | Drug delivery devices | 1 | 36 | 470 | 582 |
| 642 | personality | 5 | 36 | 1105 | 1943 |
| 642 | Navigation | 2 | 36 | 358 | 274 |
| 645 | Global Health | 1 | 35 | 1709 | 1348 |
| 645 | Machine Learning | 3 | 35 | 328 | 480 |
| 645 | Molecular cloning | 1 | 35 | 1948 | 1759 |
| 645 | Genetic recombination | 1 | 35 | 1916 | 1744 |
| 645 | primary prevention | 1 | 35 | 707 | 713 |
| 645 | Recombinant DNA | 1 | 35 | 1994 | 1818 |
| 645 | pharmaceutical industry | 2 | 35 | 692 | 801 |
| 652 | Technology Assessment | 4 | 34 | 288 | 989 |
| 652 | hazard mitigation | 3 | 34 | 962 | 1534 |
| 652 | plant molecular biology | 2 | 34 | 1581 | 2124 |
| 652 | software | 3 | 34 | 1038 | 1588 |
| 656 | Climatology | 2 | 33 | 1887 | 2185 |
| 656 | Clinical Pharmacology | 2 | 33 | 1293 | 1514 |
| 656 | visualization | 8 | 33 | 787 | 1119 |
| 656 | Medical innovations | 3 | 33 | 804 | 1529 |
| 656 | Building | 3 | 33 | 548 | 665 |
| 656 | drug therapy | 2 | 33 | 1735 | 2012 |
| 656 | Fibers | 4 | 33 | 69 | 88 |
| 656 | wood | 1 | 33 | 763 | 596 |
| 664 | Histology | 4 | 32 | 1425 | 2175 |
| 664 | Plant cells | 1 | 32 | 1316 | 1673 |
| 666 | Genetics | 5 | 31 | 2359 | 3787 |
| 666 | Teaching | 3 | 31 | 1722 | 2116 |
| 666 | thinking | 3 | 31 | 306 | 613 |
| 666 | Informatics | 5 | 31 | 622 | 1213 |
| 666 | Creativity | 3 | 31 | 288 | 654 |
| 671 | Human Geography | 2 | 30 | 1263 | 1349 |
| 671 | Evidence-Based Medicine | 2 | 30 | 878 | 1138 |
| 671 | Optoelectronic devices | 9 | 30 | 470 | 1052 |
| 674 | Astrophysics | 6 | 29 | 2127 | 3010 |
| 674 | Child welfare | 1 | 29 | 1734 | 1483 |
| 674 | Flood forecasting | 2 | 29 | 137 | 268 |
| 674 | Flood control | 2 | 29 | 337 | 451 |
| 674 | Adolescent | 1 | 29 | 2799 | 2448 |
| 674 | residential treatment | 1 | 29 | 299 | 275 |
| 680 | Oncogenes | 2 | 28 | 981 | 1422 |
| 680 | food contamination | 3 | 28 | 1053 | 1515 |
| 680 | Hydrocarbons | 2 | 28 | 141 | 161 |
| 683 | Aerospace Engineering | 2 | 27 | 314 | 287 |
| 683 | Food Safety | 2 | 27 | 373 | 531 |
| 683 | Educational Psychology | 1 | 27 | 2044 | 1881 |
| 683 | Molecules | 6 | 27 | 1083 | 1664 |
| 683 | Brain | 1 | 27 | 2878 | 2909 |
| 683 | Nonlinear mechanics | 3 | 27 | 447 | 720 |
| 689 | technology transfer | 1 | 26 | 561 | 597 |
| 689 | Immunochemistry | 4 | 26 | 800 | 1308 |
| 689 | Noise | 1 | 26 | 314 | 215 |
| 689 | Welding | 5 | 26 | 163 | 268 |
| 689 | radar | 1 | 26 | 343 | 282 |
| 689 | Sonar | 1 | 26 | 286 | 245 |
| 689 | Egypt | 2 | 26 | 740 | 1155 |
| 696 | Financial Engineering | 1 | 25 | 366 | 428 |
| 696 | Roads | 2 | 25 | 759 | 796 |
| 696 | body temperature | 1 | 25 | 988 | 974 |
| 699 | Food Preservation | 3 | 24 | 838 | 1181 |
| 699 | Municipal Engineering | 2 | 24 | 449 | 801 |
| 699 | Computational Fluid Dynamics | 1 | 24 | 1016 | 1021 |
| 699 | Labor Unions | 1 | 24 | 536 | 338 |
| 699 | labor | 1 | 24 | 632 | 460 |
| 699 | Labor history | 1 | 24 | 227 | 94 |
| 699 | Labor Movement | 1 | 24 | 370 | 190 |
| 706 | Medical Technology | 2 | 23 | 1783 | 2293 |
| 706 | Sedimentology | 2 | 23 | 740 | 1049 |
| 706 | locomotion | 1 | 23 | 972 | 1034 |
| 706 | posture | 1 | 23 | 972 | 1034 |
| 706 | gait | 1 | 23 | 972 | 1034 |
| 706 | walking | 1 | 23 | 972 | 1034 |
| 712 | Urban Geography | 1 | 22 | 417 | 452 |
| 712 | Nanobiotechnology | 1 | 22 | 729 | 1091 |
| 712 | Calculus of Variations | 4 | 22 | 474 | 675 |
| 712 | Corporate governance | 1 | 22 | 1097 | 1193 |
| 712 | Data Warehousing | 1 | 22 | 24 | 24 |
| 712 | Human Resources | 1 | 22 | 838 | 1109 |
| 712 | Solar System | 1 | 22 | 989 | 1010 |
| 719 | Developmental Psychology | 4 | 21 | 848 | 1535 |
| 719 | Water Conservation | 2 | 21 | 98 | 173 |
| 719 | international trade | 1 | 21 | 1282 | 1147 |
| 719 | Foodborne diseases | 2 | 21 | 303 | 568 |
| 719 | industrial relations | 2 | 21 | 1012 | 1247 |
| 719 | Fashion | 1 | 21 | 295 | 269 |
| 725 | Mineralogy | 3 | 20 | 1232 | 1730 |
| 725 | Combinatorial chemistry | 1 | 20 | 1074 | 1365 |
| 725 | Supramolecular chemistry | 3 | 20 | 233 | 428 |
| 725 | DNA repair | 1 | 20 | 457 | 576 |
| 725 | electrocatalysis | 2 | 20 | 132 | 286 |
| 730 | Industrial Sociology | 1 | 19 | 298 | 384 |
| 730 | Organizational learning | 2 | 19 | 602 | 929 |
| 730 | Knowledge management | 3 | 19 | 388 | 878 |
| 730 | Calorimetry | 4 | 19 | 1079 | 1837 |
| 730 | Porous materials | 1 | 19 | 1299 | 1244 |
| 730 | Thermal analysis | 4 | 19 | 1079 | 1837 |
| 736 | Emerging infectious diseases | 1 | 18 | 559 | 771 |
| 736 | Superconductors | 2 | 18 | 986 | 1109 |
| 736 | Monomers | 2 | 18 | 96 | 183 |
| 736 | phase diagrams | 2 | 18 | 185 | 230 |
| 740 | Nanomedicine | 1 | 17 | 495 | 734 |
| 740 | Computational Linguistics | 3 | 17 | 562 | 883 |
| 740 | Electrocardiography | 1 | 17 | 536 | 476 |
| 740 | Electrophysiology | 1 | 17 | 1235 | 1258 |
| 740 | biological monitoring | 2 | 17 | 620 | 1149 |
| 745 | Nuclear Chemistry | 1 | 16 | 1596 | 1483 |
| 745 | Radiochemistry | 1 | 16 | 1523 | 1367 |
| 745 | Parallel Processing | 2 | 16 | 540 | 880 |
| 745 | Biogeochemistry | 1 | 16 | 1484 | 1860 |
| 745 | Organic Geochemistry | 1 | 16 | 548 | 755 |
| 745 | motivation | 1 | 16 | 662 | 821 |
| 745 | Emotion | 1 | 16 | 409 | 570 |
| 745 | isomerism | 2 | 16 | 419 | 684 |
| 745 | Minority Health | 1 | 16 | 203 | 223 |
| 745 | Biomolecules | 1 | 16 | 760 | 1010 |
| 745 | biological agents | 5 | 16 | 516 | 794 |
| 745 | Chirality | 2 | 16 | 419 | 684 |
| 745 | Emotions | 1 | 16 | 903 | 1104 |
| 758 | Food Science | 1 | 15 | 474 | 528 |
| 758 | Psycholinguistics | 2 | 15 | 1056 | 1478 |
| 758 | Neurolinguistics | 2 | 15 | 537 | 840 |
| 758 | Databases | 1 | 15 | 585 | 620 |
| 758 | Stochastic Processes | 3 | 15 | 953 | 1471 |
| 758 | Microbial Biotechnology | 1 | 15 | 1681 | 2006 |
| 758 | Drug targeting | 1 | 15 | 582 | 867 |
| 758 | Alternative Medicine | 1 | 15 | 2294 | 2681 |
| 758 | complementary therapies | 1 | 15 | 2563 | 2873 |
| 758 | space environment | 2 | 15 | 217 | 375 |
| 758 | atmospheric models | 1 | 15 | 861 | 1075 |
| 769 | Microprocessors | 3 | 14 | 621 | 1137 |
| 769 | Gene expression regulation | 4 | 14 | 742 | 1576 |
| 769 | Genetic regulation | 4 | 14 | 829 | 1683 |
| 769 | protein | 4 | 14 | 962 | 1736 |
| 769 | Agriculture | 3 | 14 | 2033 | 3176 |
| 769 | Aquaculture | 1 | 14 | 1938 | 2159 |
| 775 | Hydrogeology | 2 | 13 | 817 | 1320 |
| 775 | Graph Theory | 2 | 13 | 925 | 986 |
| 775 | Oral Pathology | 1 | 13 | 184 | 287 |
| 775 | Geothermal Energy | 2 | 13 | 328 | 659 |
| 775 | Discrete Mathematics | 2 | 13 | 503 | 473 |
| 775 | Operator theory | 3 | 13 | 457 | 636 |
| 775 | graph | 2 | 13 | 503 | 473 |
| 775 | Combinatorial analysis | 2 | 13 | 1202 | 1235 |
| 783 | Nuclear Energy | 2 | 12 | 1148 | 1471 |
| 783 | Occupational Health | 1 | 12 | 1680 | 1704 |
| 783 | Rural Development | 1 | 12 | 903 | 1084 |
| 783 | Cartography | 1 | 12 | 847 | 799 |
| 783 | economic indicators | 1 | 12 | 212 | 267 |
| 783 | industrial hygiene | 1 | 12 | 1682 | 1607 |
| 783 | Cultural diversity | 1 | 12 | 306 | 446 |
| 783 | Rheology | 1 | 12 | 892 | 1086 |
| 783 | Chemical safety | 1 | 12 | 93 | 79 |
| 783 | Food texture | 1 | 12 | 323 | 475 |
| 783 | nuclear power | 2 | 12 | 559 | 707 |
| 783 | Capital market | 2 | 12 | 579 | 1039 |
| 783 | biomimicry | 2 | 12 | 221 | 468 |
| 783 | cultural pluralism | 1 | 12 | 758 | 874 |
| 783 | rivers | 1 | 12 | 534 | 725 |
| 798 | Phytochemistry | 1 | 11 | 634 | 921 |
| 798 | Plant Ecology | 2 | 11 | 1860 | 2802 |
| 798 | Wildlife conservation | 1 | 11 | 1537 | 1943 |
| 798 | Thin Films | 2 | 11 | 669 | 1020 |
| 798 | Integrative Medicine | 1 | 11 | 529 | 597 |
| 798 | Phytoremediation | 1 | 11 | 634 | 921 |
| 798 | Health | 2 | 11 | 2319 | 3350 |
| 798 | environmental remediation | 1 | 11 | 757 | 1041 |
| 798 | Bioreactors | 1 | 11 | 634 | 921 |
| 798 | Erosion | 1 | 11 | 242 | 471 |
| 798 | Parkinson's disease | 1 | 11 | 403 | 593 |
| 798 | Cheminformatics | 1 | 11 | 577 | 818 |
| 798 | Jurisprudence | 1 | 11 | 1363 | 1441 |
| 798 | Evolution equations | 2 | 11 | 210 | 351 |
| 812 | Biochemical Genetics | 2 | 10 | 593 | 882 |
| 812 | Ecohydrology | 3 | 10 | 362 | 908 |
| 812 | Fixed Point Theory | 4 | 10 | 207 | 495 |
| 812 | Detergents | 3 | 10 | 49 | 111 |
| 812 | forest policy | 1 | 10 | 626 | 876 |
| 812 | Scanning electron microscopy | 1 | 10 | 297 | 402 |
| 812 | Plasma devices | 2 | 10 | 349 | 614 |
| 819 | Telemedicine | 1 | 9 | 629 | 955 |
| 819 | Chemical kinetics | 1 | 9 | 1288 | 1394 |
| 819 | Raman spectroscopy | 1 | 9 | 1299 | 1641 |
| 819 | Infrared spectroscopy | 1 | 9 | 686 | 992 |
| 819 | Social behavior | 3 | 9 | 1121 | 2087 |
| 819 | silicon | 2 | 9 | 478 | 902 |
| 819 | Vaccines | 2 | 9 | 1743 | 2721 |
| 826 | Oncology | 2 | 8 | 1993 | 3213 |
| 826 | Transportation Engineering | 1 | 8 | 514 | 745 |
| 826 | Computer Architecture | 2 | 8 | 682 | 1026 |
| 826 | Regional Planning | 1 | 8 | 2111 | 2533 |
| 826 | Histochemistry | 2 | 8 | 1125 | 1759 |
| 826 | Historic Preservation | 1 | 8 | 269 | 389 |
| 826 | soil management | 1 | 8 | 895 | 1287 |
| 826 | Superconductivity | 1 | 8 | 696 | 816 |
| 826 | Social policy | 1 | 8 | 1627 | 1965 |
| 826 | fishing industry | 1 | 8 | 243 | 391 |
| 826 | immunoassay | 3 | 8 | 182 | 600 |
| 826 | Algal blooms | 1 | 8 | 476 | 768 |
| 826 | Cyanobacteria | 1 | 8 | 476 | 768 |
| 826 | social aspects | 1 | 8 | 163 | 211 |
| 826 | infrared technology | 4 | 8 | 179 | 385 |
| 826 | tillage | 1 | 8 | 717 | 1102 |
| 826 | traffic safety | 2 | 8 | 379 | 789 |
| 826 | Fisheries | 1 | 8 | 2146 | 2493 |
| 826 | microalgae | 1 | 8 | 476 | 768 |
| 826 | phototherapy | 1 | 8 | 224 | 235 |
| 846 | Applied Linguistics | 1 | 7 | 1030 | 1137 |
| 846 | Number Theory | 5 | 7 | 627 | 1268 |
| 846 | Forest Ecology | 1 | 7 | 1471 | 2014 |
| 846 | diffusion | 2 | 7 | 426 | 427 |
| 846 | Forest Management | 1 | 7 | 1415 | 1888 |
| 846 | Organometallic compounds | 2 | 7 | 1501 | 2203 |
| 846 | Government policy | 1 | 7 | 315 | 475 |
| 846 | rare diseases | 1 | 7 | 838 | 1148 |
| 846 | Navier-Stokes equations | 2 | 7 | 214 | 362 |
| 846 | India | 1 | 7 | 2509 | 2601 |
| 856 | Environmental Ethics | 1 | 6 | 351 | 453 |
| 856 | emergency management | 1 | 6 | 1180 | 1737 |
| 856 | Emergency Medicine | 1 | 6 | 1593 | 1922 |
| 856 | Multiphase Flow | 1 | 6 | 631 | 914 |
| 856 | Ecosystem management | 1 | 6 | 1121 | 1551 |
| 856 | Plant physiology | 1 | 6 | 2596 | 3277 |
| 856 | Randomized Controlled Trials | 1 | 6 | 1372 | 1795 |
| 856 | Cardiovascular diseases | 1 | 6 | 1845 | 2254 |
| 856 | Securities | 1 | 6 | 695 | 996 |
| 856 | Interfaces | 1 | 6 | 655 | 945 |
| 856 | Emulsions | 2 | 6 | 486 | 1048 |
| 856 | Iron | 2 | 6 | 369 | 692 |
| 856 | Host-parasite interactions | 1 | 6 | 1557 | 2204 |
| 856 | Stress | 1 | 6 | 561 | 925 |
| 856 | stocks | 1 | 6 | 341 | 655 |
| 871 | Software Engineering | 4 | 5 | 875 | 1803 |
| 871 | Production Planning | 2 | 5 | 355 | 960 |
| 871 | Green Technology | 2 | 5 | 555 | 1468 |
| 871 | Molecular recognition | 1 | 5 | 449 | 793 |
| 871 | Production Control | 2 | 5 | 341 | 946 |
| 871 | Chemical processes | 1 | 5 | 982 | 1386 |
| 871 | Finite Element Method | 1 | 5 | 568 | 829 |
| 871 | Alloys | 1 | 5 | 600 | 694 |
| 871 | Cerebral cortex | 1 | 5 | 1149 | 1604 |
| 880 | Archaeology | 1 | 4 | 1742 | 2030 |
| 880 | Philosophy | 2 | 4 | 1671 | 1823 |
| 880 | Systems Theory | 2 | 4 | 543 | 1131 |
| 880 | Cryptography | 2 | 4 | 852 | 1303 |
| 880 | Neurophysiology | 1 | 4 | 3126 | 3903 |
| 880 | Child | 1 | 4 | 2844 | 3578 |
| 880 | Liquid Crystals | 1 | 4 | 1305 | 1503 |
| 880 | Expert Systems | 2 | 4 | 301 | 881 |
| 880 | Genetic translocation | 1 | 4 | 359 | 618 |
| 880 | Quantum Gravity | 1 | 4 | 2276 | 2604 |
| 880 | Fractional Calculus | 1 | 4 | 359 | 579 |
| 880 | Child Development | 1 | 4 | 2335 | 3065 |
| 880 | Noise control | 2 | 4 | 356 | 249 |
| 880 | Magnetic Resonance Spectroscopy | 1 | 4 | 1456 | 1844 |
| 880 | Developmental Disabilities | 1 | 4 | 1369 | 1986 |
| 880 | Reservoirs | 1 | 4 | 364 | 619 |
| 880 | nuclear magnetic resonance spectroscopy | 1 | 4 | 1022 | 1346 |
| 880 | Earthquakes | 1 | 4 | 617 | 868 |
| 880 | plasmids | 1 | 4 | 359 | 618 |
| 880 | North America | 1 | 4 | 1329 | 1761 |
| 880 | ozone | 1 | 4 | 260 | 539 |
| 880 | Soundproofing | 1 | 4 | 229 | 269 |
| 880 | Sites | 1 | 4 | 842 | 1264 |
| 880 | Refractory materials | 2 | 4 | 178 | 341 |
| 880 | Landslides | 1 | 4 | 461 | 791 |
| 880 | NMR | 1 | 4 | 848 | 1160 |
| 880 | brain mapping | 1 | 4 | 799 | 1175 |
| 880 | Industrial noise | 1 | 4 | 109 | 129 |
| 880 | magnetic resonance | 1 | 4 | 861 | 1168 |
| 909 | Landscape Architecture | 1 | 3 | 339 | 482 |
| 909 | Aerodynamics | 1 | 3 | 190 | 230 |
| 909 | Digital electronics | 2 | 3 | 420 | 798 |
| 909 | Sustainable agriculture | 1 | 3 | 1277 | 1963 |
| 909 | Action Research | 1 | 3 | 476 | 868 |
| 909 | Crystallography | 1 | 3 | 2184 | 2394 |
| 909 | Harmonic Analysis | 1 | 3 | 287 | 489 |
| 909 | natural history museums | 2 | 3 | 74 | 176 |
| 909 | drug development | 1 | 3 | 1301 | 1975 |
| 909 | High performance computing | 1 | 3 | 198 | 324 |
| 909 | gardens | 1 | 3 | 82 | 62 |
| 909 | enzymes | 1 | 3 | 1968 | 2737 |
| 921 | Horticulture | 2 | 2 | 894 | 1749 |
| 921 | Plant Biotechnology | 2 | 2 | 915 | 1799 |
| 921 | Microfabrication | 4 | 2 | 266 | 1008 |
| 921 | Transnational corporations | 1 | 2 | 810 | 1360 |
| 921 | Flow chemistry | 2 | 2 | 34 | 174 |
| 921 | Nanomanufacturing | 4 | 2 | 85 | 356 |
| 921 | Global warming | 1 | 2 | 342 | 572 |
| 921 | Cardiovascular system | 1 | 2 | 1435 | 1989 |
| 921 | Sports | 1 | 2 | 2723 | 3173 |
| 921 | optical pattern recognition | 2 | 2 | 181 | 521 |
| 921 | Information society | 2 | 2 | 198 | 729 |
| 921 | viruses | 1 | 2 | 1597 | 2294 |
| 921 | Microscopy | 1 | 2 | 2015 | 2720 |
| 921 | Approximation Theory | 2 | 2 | 573 | 962 |
| 921 | Intellectual disability | 1 | 2 | 1190 | 1786 |
| 921 | Metrology | 1 | 2 | 172 | 358 |
| 921 | DNA | 1 | 2 | 983 | 1461 |
| 921 | Exercise | 2 | 2 | 1704 | 2782 |
| 921 | Genes | 1 | 2 | 1559 | 2258 |
| 921 | Meteorites | 1 | 2 | 1099 | 1562 |
| 941 | Econometrics | 1 | 1 | 1933 | 2515 |
| 941 | Avionics | 1 | 1 | 260 | 480 |
| 941 | acupuncture | 1 | 1 | 408 | 614 |
| 941 | Cardiopulmonary Resuscitation | 1 | 1 | 319 | 516 |
| 941 | Massage therapy | 1 | 1 | 77 | 99 |
| 941 | cardiac arrest | 1 | 1 | 319 | 516 |
| 941 | Migration | 1 | 1 | 409 | 841 |
| 941 | Soviet Union | 1 | 1 | 1254 | 1769 |
| 941 | United Nations | 1 | 1 | 148 | 266 |
| 941 | Chemical reactors | 1 | 1 | 372 | 651 |
| 941 | Fluorescence | 2 | 1 | 639 | 1514 |
| 941 | Quantum theory | 1 | 1 | 1421 | 1905 |
| 953 | Anatomy | 1 | 0 | 2430 | 3258 |
| 953 | Applied Mathematics | 2 | 0 | 339 | 955 |
| 953 | Game Theory | 1 | 0 | 901 | 1359 |
| 953 | Polymer Engineering | 1 | 0 | 283 | 707 |
| 953 | Proteomics | 1 | 0 | 1419 | 2083 |
| 953 | Inventory Control | 1 | 0 | 177 | 561 |
| 953 | Petroleum Geology | 1 | 0 | 750 | 1110 |
| 953 | Sports Medicine | 1 | 0 | 3035 | 3864 |
| 953 | Photogrammetry | 2 | 0 | 1062 | 2015 |
| 953 | Intelligent Tutoring Systems | 1 | 0 | 123 | 268 |
| 953 | Mitochondrial DNA | 2 | 0 | 276 | 857 |
| 953 | Electromagnetic fields | 1 | 0 | 724 | 1148 |