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Usage: Tools

Top Tools by Simulation Users
# Tool Simulation Users Percent
Total Simulation Users 73,249 100.00%
1 PN Junction Lab 8,772 11.98%
2 Crystal Viewer Tool 7,256 9.91%
3 Band Structure Lab 6,525 8.91%
4 Nanosphere Optics Lab 6,444 8.80%
5 ABACUS - Assembly of Basic Applications for Coordinated Understanding of Semiconductors 6,303 8.60%
6 Quantum Dot Lab 5,448 7.44%
7 MOSFet 5,437 7.42%
8 MOSCap 5,122 6.99%
9 CNTbands 5,104 6.97%
10 QC-Lab 4,974 6.79%
11 Drift-Diffusion Lab 3,658 4.99%
12 FETToy 3,556 4.85%
13 CNDO/INDO 3,530 4.82%
14 nano-Materials Simulation Toolkit 2,940 4.01%
15 Carrier Statistics Lab 2,863 3.91%
16 MIT Atomic Scale Modeling Toolkit 2,848 3.89%
17 Schred 2,794 3.81%
18 BJT Lab 2,763 3.77%
19 Illinois Solid State Electronic Devices Classes Tools 2,635 3.60%
20 Spice3f4 2,611 3.56%
21 ABINIT 2,552 3.48%
22 NanoMOS 2,526 3.45%
23 Nanowire 2,305 3.15%
24 1D Heterostructure Tool 2,282 3.12%
25 a TCAD Lab 2,110 2.88%
26 Resonant Tunneling Diode Simulation with NEGF 2,093 2.86%
27 Periodic Potential Lab 2,002 2.73%
28 VEDA: Virtual Environment for Dynamic AFM 1,922 2.62%
29 Resonant Tunneling Diode Simulator 1,904 2.60%
30 MSL Simulator 1,871 2.55%
31 DFT calculations with Quantum ESPRESSO 1,861 2.54%
32 Padre 1,799 2.46%
33 CNTFET Lab 1,764 2.41%
34 UV/Vis Spectra simulator 1,576 2.15%
35 Adept 1,534 2.09%
36 OOF2 1,512 2.06%
37 Effect of Doping on Semiconductors 1,469 2.01%
38 Piece-Wise Constant Potential Barriers Tool 1,400 1.91%
39 OMEN Nanowire 1,346 1.84%
40 Workspace 1,345 1.84%
41 Nano-CMOS 1,339 1.83%
42 MolCToy 1,294 1.77%
43 Chess 1,279 1.75%
44 Process Lab: Concentration-Dependent Diffusion 1,192 1.63%
45 NanoTCAD ViDES 1,179 1.61%
46 Meep 1,150 1.57%
47 CNT_bands 1,144 1.56%
48 VEDA 2.0 (Virtual Environment for Dynamic AFM) 1,126 1.54%
49 SUGARCube - Cantilever 1,090 1.49%
50 NanoFET 1,083 1.48%
51 Archimedes, GNU Monte Carlo simulator 1,059 1.45%
52 AQME - Advancing Quantum Mechanics for Engineers 1,022 1.40%
53 Nanosphere Optics Lab Field Simulator 976 1.33%
54 Nano-Plasmonic Bowtie Antenna Simulator 956 1.31%
55 MuGFET 932 1.27%
56 1D Drift Diffusion Model for Crystalline Solar Cells 891 1.22%
57 Schottky-Barrier CNFET 883 1.21%
58 Bound States Calculation Lab 882 1.20%
59 Prophet 869 1.19%
60 Boltzmann Transport Simulator for CNTs 861 1.18%
61 PhotonicsDB: Optical Constants 844 1.15%
62 Process Lab:Oxidation 841 1.15%
63 OCTAViEw 836 1.14%
64 Carbon Nanotubes Interconnect Analyzer (CNIA) 832 1.14%
65 BioSensorLab 816 1.11%
66 Cylindrical CNT MOSFET Simulator 795 1.09%
67 nanoMATERIALS SeqQuest DFT 792 1.08%
68 SIESTA 784 1.07%
69 StrainBands 779 1.06%
70 Theoretical Electron Density Visualizer 768 1.05%
71 biomoca 758 1.03%
72 Molecular Foundry Photonics Toolkit 700 0.96%
73 Illinois Tools: Basic Bulk Silicon Transport Data at 300K 697 0.95%
74 Extinction, Scattering and Absorption efficiencies of single and multilayer nanoparticles 686 0.94%
75 Polymer Modeler 672 0.92%
76 MESFET Lab 660 0.90%
77 The Virtual Kinetics of Materials Laboratory 654 0.89%
78 Northwestern University Initiative for Teaching Nanoscience 651 0.89%
79 Illinois Tools: PN Junction Long-Base Depletion Approximation 645 0.88%
80 Illinois Tools: MOCA 640 0.87%
81 Simple Photonic Crystals 637 0.87%
82 Berkeley GW 633 0.86%
83 CENEMS 632 0.86%
84 Graphene Interconnect 630 0.86%
85 NanoNet 630 0.86%
86 Multi-gate Nanowire FET 627 0.86%
87 BioMOCA Suite 622 0.85%
88 CNTphonons 616 0.84%
89 ADEPT 2.1 610 0.83%
90 QWalk Quantum Monte Carlo Tutorial 599 0.82%
91 GFET Tool 597 0.82%
92 Assembly for Nanotechnology Survey Courses 588 0.80%
93 CNT Heterojunction Modeler 583 0.80%
94 MD Simulation 581 0.79%
95 Nano Heatflow 571 0.78%
96 Carbon nanotube based NEMS with cantilever structure 570 0.78%
97 Carbon nanotube based fixed-fixed NEMS 569 0.78%
98 Coulomb Blockade Simulation 569 0.78%
99 Thermoelectric Power Factor Calculator for Superlattices 565 0.77%
100 Atomistic Green\\\'s Function Method 1-D Atomic Chain Simulation 548 0.75%
101 Modeling Interface-defect Generation (MIG) 547 0.75%
102 Molecular Structure Tracer 531 0.72%
103 MIT Photonic Bands 530 0.72%
104 PhotonicsSHA-2D: Modeling of Single-Period Multilayer Optical Gratings and Metamaterials 523 0.71%
105 demons 521 0.71%
106 1D Finite Different Method Conduction Heat Transfer Tool 521 0.71%
107 PETE : Purdue Emerging Technology Evaluator 516 0.70%
108 QuaMC2D 514 0.70%
109 MIT Tools for Energy Conversion and Storage 508 0.69%
110 Periodic Potential 506 0.69%
111 FD integral calculator 489 0.67%
112 PhotonicsRT: Wave Propagation in Multilayer Structures 482 0.66%
113 Equilibrium Wulff Shape Generator 476 0.65%
114 Bulk Monte Carlo Lab 457 0.62%
115 Thermoelectric Power Factor Calculator for Nanocrystalline Composites 453 0.62%
116 Semiconductor Doping 452 0.62%
117 Quantum and Semi-classical Electrostatics Simulation of SOI Trigates 446 0.61%
118 CNT Mobility 445 0.61%
119 tsuprem4 439 0.60%
120 Nanowire Tensile Deformation Lab 429 0.59%
121 90 Degrees Beam Propagation 427 0.58%
122 MIT Virtual-Source Tool 423 0.58%
123 Memristor Simulation Tool 423 0.58%
124 ElectroMat 418 0.57%
125 Brillouin Zone Viewer 417 0.57%
126 MOSFET Simulation 391 0.53%
127 REBO 387 0.53%
128 ANGEL - A Nonequilibrium Green Function Solver for LEDs 387 0.53%
129 Quantum Dot Quantum Computation Simulator 369 0.50%
130 imageJ 363 0.50%
131 nanoJoule 361 0.49%
132 OMEN_FET 360 0.49%
133 CGTB 358 0.49%
134 Hydrophobicity Lab 358 0.49%
135 Virtual Kinetics of Materials Laboratory : Polycrystalline Growth and Coarsening 350 0.48%
136 PV Analyzer 348 0.48%
137 nanoDDSCAT 347 0.47%
138 1-D Chain Dispersions 340 0.46%
139 Micelle 335 0.46%
140 Matdcal 328 0.45%
141 VEDA: Amplitude Modulated Scanning 327 0.45%
142 OPV Lab 321 0.44%
143 Micromechanics Simulation Tool 319 0.44%
144 Carrier Concentration 317 0.43%
145 Process Lab: Oxidation Flux 315 0.43%
146 Gibbs 293 0.40%
147 Virtual Kinetics of Materials Laboratory : Spinodal Decomposition 293 0.40%
148 Virtual Kinetics of Materials Laboratory: Spinodal Decomposition 3D 289 0.39%
149 Thin-Film and Multi-Element Thermoelectric Devices Simulator 281 0.38%
150 Path Integral Monte Carlo 279 0.38%
151 ACUTE 278 0.38%
152 KP Nanowire/UTB FET 275 0.38%
153 VEDA: Dynamic Approach Curves 273 0.37%
154 Monte Carlo DNA Simulator 270 0.37%
155 Process Lab: Defect-coupled diffusion 262 0.36%
156 NanoPlasticity Lab 261 0.36%
157 Mobility and Resistivity Tool 257 0.35%
158 Graphene Raman Imaging and Spectroscopy Processing v1.2 246 0.34%
159 Spin Coupled Quantum Dots 239 0.33%
160 Crack Propagation Lab 238 0.32%
161 Amorphous Silicon Generator 232 0.32%
162 Illinois Tools: PN Junction Short-Base Depletion Approximation 231 0.32%
163 Illinois Tools: Multigrid Tutorial 231 0.32%
164 Analytic Spin Precession Simulator 229 0.31%
165 PVpanel Sim 227 0.31%
166 PNP Cyclic Peptide Ion Channel Model 226 0.31%
167 Hyperlens Design Solver 225 0.31%
168 Virtual Kinetics of Materials Laboratory: Dendritic Growth 225 0.31%
169 Illinois Tools: NP Junction: Long-Base Depletion Approximation 223 0.30%
170 Stick2D 222 0.30%
171 Bulk GaAs Ensemble Monte Carlo 220 0.30%
172 Illinois Tools: Nanoparticles Array Lab 217 0.30%
173 Atomic Stick-Slip 217 0.30%
174 Stretching Simulation of FCC Crystal 215 0.29%
175 2d Ideal Gas Molecular Dynamics 215 0.29%
176 Illinois Tools: Optics Lab 212 0.29%
177 Genetic algorithm 212 0.29%
178 Illinois Tools: NanoGromacs_Intro 198 0.27%
179 Magnetic Tunnel Junction Lab 195 0.27%
180 S4: Stanford Stratified Structure Solver 194 0.26%
181 Valence Shell Electron Pair Repulsion simulator 187 0.26%
182 nanoMATERIALS nanoscale heat transport 187 0.26%
183 SugarAid Thermodynamics 186 0.25%
184 DDSCAT Convert: A Target Generation Tool 184 0.25%
185 SugarCube 182 0.25%
186 Prophet Nanowire 181 0.25%
187 Illinois Tools: NanoGromacs 180 0.25%
188 MiniMol: Minimal Molecular Simulation Tool 180 0.25%
189 Sugaraid 172 0.23%
190 DBR Laser Simulator 171 0.23%
191 Electron Magnetic Resonance (EMR) in Nanoparticles 168 0.23%
192 Thermoelectric Generator Module with Convective Heat Transfer 168 0.23%
193 Intro to MOS-Capacitor Tool 165 0.23%
194 Composite Laminate Analysis 161 0.22%
195 MEMSLab 160 0.22%
196 Stretching simulation of an alpha-helical protein domain 158 0.22%
197 Coarse Grain Lipid Simulator 157 0.21%
198 Linearized Boltzmann transport calculator for thermoelectric materials 155 0.21%
199 Circuit Elements 151 0.21%
200 Capacitance Modeling Tool Using Schwarz-Christoffel Mapping 150 0.20%
201 MEMS Resonator - Tang 150 0.20%
202 SEST 148 0.20%
203 nanoDDSCAT+ 147 0.20%
204 MEEPPV 146 0.20%
205 Function Discovery Tool 144 0.20%
206 LCOE Calculator 143 0.20%
207 Forced Protein Unfolding 141 0.19%
208 Illinois Tools: Nanoparticle Quantitative Lab 141 0.19%
209 Medici 139 0.19%
210 Illinois Tools: NanoGromacsDemo 138 0.19%
211 Protein Contact Maps 138 0.19%
212 Model for Far From Equilibrium Transport in CNT/GNR FETs 135 0.18%
213 Hyperlens Layer Designer 125 0.17%
214 Small Molecules in Intense Lasers via Time-Dependent Density Functional Theory 124 0.17%
215 SUGARCube - ADXL Accelerometer 123 0.17%
216 Rode\'s Method 120 0.16%
217 Illinois Tools: Bio Photonics Simulator 119 0.16%
218 Illinois Tools: NP Junction: Short-Base Depletion Approximation 116 0.16%
219 XPS Thickness Solver 115 0.16%
220 Illinois Tools: Optical Beam Focusing System 112 0.15%
221 EPR - ESR 111 0.15%
222 Modeling Thermal Interaction between Laser Light and AFM 110 0.15%
223 Normal Distribution 109 0.15%
224 PhotonicsCL: Photonic Cylindrical Multilayer Lenses 107 0.15%
225 Nanostructured Optoelectronics Toolbox 105 0.14%
226 Nanoindentation 104 0.14%
227 Bio Composite Simulator 104 0.14%
228 Base Motion Calculations 103 0.14%
229 SUGARCube - Netlist Input Tool 103 0.14%
230 Exciton Dynamics Simulator 102 0.14%
231 ReaxFF 100 0.14%
232 Anisotropy Calculator - 3D Visualization Toolkit 99 0.14%
233 Micro-Mechanics Simulation Tool: Thin film 99 0.14%
234 Polymatic 99 0.14%
235 cadnano to PDB File Converter 98 0.13%
236 SugarAid ECE202 97 0.13%
237 Minority Carrier Diffusion Equation (MCDE) Tool 95 0.13%
238 Exciton Dynamics Lab for Light-Harvesting Complexes (GPU-HEOM) 93 0.13%
239 Thermoelectric Power Generator System Optimization and Cost Analysis 92 0.13%
240 Perfect Absorber Metamaterial simulator 88 0.12%
241 Illinois Tools: Nanofilm Lab 86 0.12%
242 Random laser dynamics 86 0.12%
243 SUGARCube - Chevron Thermal Actuator 83 0.11%
244 Ohms Law 83 0.11%
245 Simulation and Admittance Analysis for Advanced Metal-Insulator-Semiconductor Characterization 80 0.11%
246 Analytic conduction solutions 78 0.11%
247 Uniaxial and Biaxial Stress Strain Calculator for Semiconductors 78 0.11%
248 On-Chip Thermoelectric Cooling Tool 78 0.11%
249 Active Media FDTD Nanophotonic Device Simulator 76 0.10%
250 hotSPICE 76 0.10%
251 1-D Phonon BTE Solver 76 0.10%
252 Mass spectrum ion trajectory 76 0.10%
253 Crystalline Cellulose - Atomistic Toolkit 74 0.10%
254 Berkeley XAS 72 0.10%
255 Illinois Tools: Biconvex Lens 71 0.10%
256 Illinois Tool: FIONA (Fluorescence Imaging with One Nanometer Accuracy) 69 0.09%
257 Nano-Bio-Photonics Simulator 67 0.09%
258 Two-temperature Non-equilibrium Molecular Dynamics Simulator 67 0.09%
259 Clustermag 66 0.09%
260 LanTraP 65 0.09%
261 Exciton Annihilation Simulator 64 0.09%
262 Particle Velocity Estimate 63 0.09%
263 Q-factor calculator with Uncertainty Quantification 63 0.09%
264 PC1D 63 0.09%
265 Bayesian Calibration 62 0.08%
266 PhotonicsGAIN-0D 61 0.08%
267 Temperature Accelerated Dynamics 61 0.08%
268 IMOD online 61 0.08%
269 Series and Parallel 60 0.08%
270 Comb Drive Levitation 60 0.08%
271 Bulk Heterojunction Morphology Generator 59 0.08%
272 Multimeter 58 0.08%
273 Graphene Switch Box 54 0.07%
274 Hyper-REBO 54 0.07%
275 Jamming of Soft Frictionless Spheres 53 0.07%
276 Quasicontinuum Method 53 0.07%
277 A Blind Fish in a River with a Waterfall 52 0.07%
278 Carbon Nanotube Relay 52 0.07%
279 Cyber-Infrastructure for Imaging and Simulation of Molecular and Cellular Mechanics (CISMCM) 52 0.07%
280 MEMS Piezoelectric Vibrational Energy Harvesting Lab 52 0.07%
281 LAMMPS 52 0.07%
282 Nanoindentation close to an interface 51 0.07%
283 Solar PV 51 0.07%
284 Near-field radiation transport between two planes 50 0.07%
285 Computational Nanodynamics Lab 49 0.07%
286 Functionalization Workbench 48 0.07%
287 Crack Propagation Simulation 46 0.06%
288 Impedance Adder 45 0.06%
289 TEM Lattice Calculator 45 0.06%
290 Convolution Tool 44 0.06%
291 SMC 42 0.06%
292 Bandgap Optimizer for Spectral Splitting PV Systems 42 0.06%
293 Modeling of Optical Multilayers for Both Spectra and Admittance Loci 42 0.06%
294 Simulator for a T-stub transistor in a magnetic field 41 0.06%
295 Polymer Nano Brush 40 0.05%
296 PhotonicVASEfit: VASE fitting tool 39 0.05%
297 Isotropic random fracture model for metal hydride powder 38 0.05%
298 ab initio Model for Mobility and Seebeck coefficient using Boltzmann Transport (aMoBT) equation 38 0.05%
299 Resistor Color Code 38 0.05%
300 Passive Filter Circuits 36 0.05%
301 Energies and Lifetimes with Complex-Scaling 34 0.05%
302 nuSIMM: nanoHUB user Simulation Interface for Molecular Modeling 33 0.05%
303 Free Edge Approximation for the Angle-Ply Laminate 33 0.05%
304 Molecular Dynamics Showcase 33 0.05%
305 Pattern Formation in Bacterial Populations 32 0.04%
306 Finite Buffer dCME (fb-dCME) 32 0.04%
307 Nisin Diffusion Tool 31 0.04%
308 QSTEM online 29 0.04%
309 TRANSpull: computes pulling coupled to transport properties of single molecules. 29 0.04%
310 Phasor 29 0.04%
311 Frenkel-Kontarova Model 28 0.04%
312 Bimodal Polymer Nano Brush 28 0.04%
313 MOLpull: A tool for molecular free energy reconstruction along a pulling coordinate 28 0.04%
314 Model and Algorithm Prototyping Platform 28 0.04%
315 Nanoindentation of Soft Elastic Materials 28 0.04%
316 PhotonicsPOS: Particle on Substrate 27 0.04%
317 Gaussian process regression in 1D 27 0.04%
318 HgCdTe Photodetector Lab 27 0.04%
319 Optical Properties of Single Coaxial Nanowires 26 0.04%
320 Quantum Point Contact 25 0.03%
321 DFT Material Properties Simulator 24 0.03%
322 Nanoindentation of soft viscoelastic materials 22 0.03%
323 DSMC 1D Planar Couette Flow 21 0.03%
324 Thermophotonic Selective Emitter Simulation 21 0.03%
325 Tensile Mechanics of alpha-Helical Polypeptides 21 0.03%
326 Neural Systems Modeling Ch10-13 Master Tool 20 0.03%
327 [Illinois]: Neural Systems Modeling Ch 1-5 Master Tool 19 0.03%
328 Powder Compaction 19 0.03%
329 Cu in CdTe Lab 17 0.02%
330 Hydrodynamic Particle Trapping 16 0.02%
331 Delta-Wye 16 0.02%
332 Combined Microstructure and Heat Transfer Modeling of Carbon Nanotube Thermal Interface Materials 16 0.02%
333 Hot Carrier Degradation Universal Scaling 16 0.02%
334 III-V Strain Compensation Calculator 15 0.02%
335 Continuous casting of weld filler wire 15 0.02%
336 Creep deformation in RF-MEMS 15 0.02%
337 DSMC 0D Equilibrium 14 0.02%
338 Multiscale Modeling of Thermoelectric Cooler 13 0.02%
339 [Illinois]: Big Mess 12 0.02%
340 Coarse-Grained Model of RF MEMS Device 12 0.02%
341 Nanomaterial mechanics explorer 12 0.02%
342 System of Systems Analytic Workbench Toolset 11 0.02%
343 TPV efficiency simulation 11 0.02%
344 [Illinois]: Velocity storage and leakage 11 0.02%
345 ?plasma for Modified Paschen Curve Calculator 11 0.02%
346 Viscoelastic Shear Lag 9 0.01%
347 [Illinois]: Kohonen self-organizing map (SOM) algorithm 8 0.01%
348 Nanoscale Solid-State Lighting Device Simulator 8 0.01%
349 Projectile Motion Example Tool 8 0.01%
350 Rosenbrock Function for testing Uncertainty Quantification 8 0.01%
351 Fowler Nordheim Field Emission Calculator 8 0.01%
352 [Illinois]: Midbrain dopamine neuron responses to temporal-difference learning 8 0.01%
353 [Illinois]: Neural Systems Modeling Ch 6-9 Master Tool 8 0.01%
354 Traction Force Microscopy 8 0.01%
355 [Illinois]: Two leaky integrators in series 7 0.01%
356 [Illinois]: Fish classification using back-propagation 7 0.01%
357 Granular Crystals 6 0.01%
358 [Illinois]: Avoidance Learn Simulation 6 0.01%
359 [Illinois]: Optimize Connectivity Profile of Activity-Bubble Network 6 0.01%
360 Gaussian processes 1D 6 0.01%
361 [Illinois]: Temporal Difference, Iterative Dynamic Programming, and Least Mean Squares 6 0.01%
362 [Illinois]: Gill withdrawal habituation 6 0.01%
363 Locust-flight central pattern generator 5 0.01%
364 MyTestTool 5 0.01%
365 [Illinois]: Predictor-corrector simulation of parabigeminal nucleus neural responses 5 0.01%
366 Simulate Knudsen Thermal Forces using DSMC solver SPARTA 5 0.01%
367 [Illinois]: Direction Selectivity 4 0.01%
368 [Illinois] A Response of a Single Neuron with Positive Feedback 4 0.01%
369 [Illinois] KohonenSOM 4 0.01%
370 [Illinois]: Posterior probabilities of hypothetical fish classes 4 0.01%
371 Gaussian processes 2D 4 0.01%
372 [Illinois]: Posterior target probability given single-sensory input (delta rule) 4 0.01%
373 [Illinois]: Predict Correct Set Up 4 0.01%
374 Time-dependent gate oxide breakdown Lab 4 0.01%
375 [Illinois]: Avoidance Learn Simulation with 'Call' Neuron 4 0.01%
376 [Illinois]: BUTDprobInference 4 0.01%
377 [Illinois]: BUTDjointDistribution 4 0.01%
378 [Illinois]: AsynchUp 4 0.01%
379 [Illiniois]: SynchUp 4 0.01%
380 2D cluster analysis 3 0.00%
381 R3 Model Xyce Simulation Lab 3 0.00%
382 MEMOSA-based 2-Dimensional Pull-In Voltage Simulation 3 0.00%
383 Workspace running on Moonshot nodes 3 0.00%
384 [Illinois]: Error Gradient Estimations Due to Perturbation of One Weight at a Time 3 0.00%
385 Two-unit oculomotor integrator 3 0.00%
386 Generation Model with Coupled Mode Theory 3 0.00%
387 nicktest title update3334 3 0.00%
388 [Illinois]: Posterior probability of a target given input for two senses (Bayes') 3 0.00%
389 Workspace for test VNC server and novnc client 3 0.00%
390 [Illinois]: Posterior probability of a target given single-sensory input (Bayes') 2 0.00%
391 [Illinois]: Error Gradient Estimations Due to Parallel Perturbation of Weights 2 0.00%
392 [Illinois]: Running Average 2 0.00%
393 [Illinois]: Perturbative Reinforcement Learning to Develop Distributed Representations 2 0.00%
394 [Illinois]: Sigmoidal unit training with the delta rule 2 0.00%
395 Cluster Optimization BGO 01 2 0.00%
396 Distribution Fitting and Goodness Determination 2 0.00%
397 [Illinois]: Posterior probability of a target given input for two senses (delta) 1 0.00%
398 Microbeam Dynamics with Varying Force Model 1 0.00%
399 [Illinois]: Perturbative Reinforcement Learning Using Directed Drift 1 0.00%
400 ab initio simulations with ORCA 1 0.00%

nanoHUB.org, a resource for nanoscience and nanotechnology, is supported by the National Science Foundation and other funding agencies. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.