Olivier, S.L. (2018). OpenMP Tasks: New Features in 5.0 [Conference Poster]. https://www.osti.gov/biblio/1806898
Publications
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Jump to search filtersParks, M.L., Turner, D.Z., van Bloemen Waanders, B.G., Panchadhara, R., Gordon, P., & Gordon, P. (2018). Subsurface Applications for Peridynamics [Conference Poster]. https://www.osti.gov/biblio/1575975
Ray, J., Kieweg, S., Dinzl, D.J., Carnes, B., Weirs, G., Freno, B.A., Howard, M., Smith, T.M., Nompelis, I., Candler, G.V., & Candler, G.V. (2018). Estimation of inflow uncertainties in laminar hypersonic double-cone experiments [Conference Poster]. https://doi.org/10.2514/6.2019-2279
Trask, N.A. (2018). Spatially compatible meshfree discretization through GMLS and graph theory [Presentation]. https://www.osti.gov/biblio/1761129
Staid, A. (2018). Distributed Resources and Complications for System Planning [Conference Poster]. https://www.osti.gov/biblio/1806905
Spotz, W.F. (2018). Trilinos/Albany Case Study: a Global Atmosphere Model [Presentation]. https://www.osti.gov/biblio/1806991
Rajamanickam, S., Hu, J.J., Devine, K., Wolf, M., & Wolf, M. (2018). Trilinos Framework and Solvers [Presentation]. https://www.osti.gov/biblio/1575986
Curry, M.L. (2018). Bytes are Bytes Right? [Conference Poster]. https://www.osti.gov/biblio/1577031
Berry, J., Kincher-Winoto, K., Phillips, C.A., Augustine, E., Getoor, L., & Getoor, L. (2018). Entity Resolution at Large Scale: Benchmarking and Algorithmics. https://doi.org/10.2172/1493841
Rajamanickam, S., Yasar, A., Wolf, M., Berry, J., Catlyurek, U., & Catlyurek, U. (2018). Fast Triangle Counting Using Cilk [Conference Poster]. https://www.osti.gov/biblio/1594706
Barrett, B.W., Brightwell, R.B., Grant, R., Hemmert, K.S., Bachman, W.B., Wheeler, K., Riesen, R., Hoefler, T., MacCabe, A.B., Hudson, T., & Hudson, T. (2018). The Portals 4.2 Network Programming Interface. https://doi.org/10.2172/1489622
Rajamanickam, S., Wolf, M., Phipps, E.T., Ebeida, M., Debusschere, B., & Debusschere, B. (2018). ExaLearn Application Interview [Presentation]. https://www.osti.gov/biblio/1594702
Blume-Kohout, R.J., Young, K.C., & Young, K.C. (2018). Metrics and Benchmarks for Quantum Processors: State of Play. https://doi.org/10.2172/1493362
Cowen, B., el-Genk, M.S., & el-Genk, M.S. (2018). Characterization of radiation damage in TiO2 using molecular dynamics simulations. Modelling and Simulation in Materials Science and Engineering, 26(8). https://doi.org/10.1088/1361-651X/aae21b
Lee, K., Sousedik, B., & Sousedik, B. (2018). Inexact Methods for Symmetric Stochastic Eigenvalue Problems. SIAM/ASA Journal on Uncertainty Quantification, 6(4), pp. 1744-1776. https://doi.org/10.1137/18M1176026
Green, S., Vineyard, C.M., Koc, C.K., & Koc, C.K. (2018). Impacts of Mathematical Optimizations on Reinforcement Learning Policy Performance [Conference Poster]. Proceedings of the International Joint Conference on Neural Networks. https://doi.org/10.1109/IJCNN.2018.8489519
Luhman, D.R., Lu, T., Hardy, W., Maurer, L.N., & Maurer, L.N. (2018). Hole Spin Qubits in Germanium. https://doi.org/10.2172/1475507
Safta, C., Geraci, G., Eldred, M., Najm, H.N., Riegner, D., Windl, W., & Windl, W. (2018). Interatomic Potentials Models for Cu-Ni and Cu-Zr Alloys. https://doi.org/10.2172/1475252
Chen, M.G., Darling, M.C., Stracuzzi, D.J., & Stracuzzi, D.J. (2018). Preliminary Results on Applying Nonparametric Clustering and Bayesian Consensus Clustering Methods to Multimodal Data. https://doi.org/10.2172/1475256
Trott, C.R., Shipman, G., Lopez, G., & Lopez, G. (2018). 4th Kokkos Bootcamp [Poster]. https://doi.org/10.2172/1475258
Deveci, M., Rajamanickam, S., Trott, C.R., & Trott, C.R. (2018). Multithreaded sparse matrix-matrix multiplication for many-core and GPU architectures. Parallel Computing, 78(C), pp. 33-46. https://doi.org/10.1016/j.parco.2018.06.009
Aimone, J.B. (2018). Novel approaches to numerical computing using neural algorithms [Presentation]. https://www.osti.gov/biblio/1806954
Trott, C.R. (2018). October 2018 ECP ST Project Review ECP Project WBS 2.3.1.04 [Presentation]. https://www.osti.gov/biblio/1594288
Trott, C.R. (2018). October 2018 ECP ST Project Review ECP Project WBS 2.3.1.12 [Presentation]. https://www.osti.gov/biblio/1594291
Singh, B. (2018). Chance-constrained optimization: an approximation and an application [Presentation]. https://www.osti.gov/biblio/1592656
Mitchell, J.A. (2018). Clustering to upscale microstructure morphologies [Conference Poster]. https://www.osti.gov/biblio/1806930
Bochev, P., Trask, N.A., Kuberry, P., Perego, M., Peterson, K., Bosler, P.A., & Bosler, P.A. (2018). Compatible meshless methods for DPEs [Conference Poster]. https://www.osti.gov/biblio/1806965
Nielsen, E., Blume-Kohout, R.J., Proctor, T.J., Rudinger, K.M., Sarovar, M., Young, K.C., & Young, K.C. (2018). Perturbative density matrix propagation in Gate Set Tomography [Conference Poster]. https://www.osti.gov/biblio/1882054
Willenbring, J.M. (2018). Software Development Kit (SDK) for ECP [Presentation]. https://www.osti.gov/biblio/1594287
Ward, D.R., de Campbell, A., Marshall, M., Lu, T., Tracy, L.A., Maurer, L.N., Baczewski, A.D., Misra, S., & Misra, S. (2018). Integrated devices made using atomic precision advanced manufacturing [Conference Poster]. https://www.osti.gov/biblio/1592639
Moreland, K. (2018). ATDM/ECP Milestone Memo WBS 2.3.4.04 / SNL ATDM Data and Visualization Projects STDV04-21 - [MS1/YR2] Q3: Prototype Catalyst/ParaView in-situ viz for unsteady RV flow on ATS-1. https://doi.org/10.2172/1481596
Robbins, J. (2018). Optimization-based design for AM using Plato Engine [Conference Poster]. https://www.osti.gov/biblio/1592640
Siefert, C., Bachman, W.B., Luchini, C.B., & Luchini, C.B. (2018). Sparse Matrix-Matrix Multiplication: An MPI+X Story [Presentation]. https://www.osti.gov/biblio/1592666
Stracuzzi, D.J. (2018). The Role of Uncertainty in Machine Learning [Presentation]. https://www.osti.gov/biblio/1593004
Milewicz, R.M., Raybourn, E.M., & Raybourn, E.M. (2018). Towards Sustainable Scientific Software via Interoperable Design of Extreme-scale Application Software (IDEAS-ECP) [Conference Poster]. https://www.osti.gov/biblio/1593011
Kommareddy, V.R., Awad, A., Hughes, C., Hammond, S., & Hammond, S. (2018). Exploring Allocation Policies in Disaggregated Non-Volatile Memories [Conference Poster]. https://www.osti.gov/biblio/1593020
Prokopenko, A., Thomas, S., Swirydowicz, K., Ananthan, S., Hu, J.J., Williams, A.B., Sprague, M., & Sprague, M. (2018). Deploy threading in Nalu solver stack. https://doi.org/10.2172/1481562
Huang, A., Gao, X., Pawlowski, R., Gates, J.M., Musson, L.C., Hennigan, G., Negoita, M., & Negoita, M. (2018). Developing a Harmonic Balance Method for Charon [Conference Poster]. https://www.osti.gov/biblio/1593027
Ober, C.C., Pawlowski, R., Conde, S., Tezaur, I.K., Phipps, E.T., Phillips, E., Mota, A., Phlipot, G., Ridzal, D., Hansen, M.A., Fisher, T.C., & Fisher, T.C. (2018). Tempus Time-Integration Package & Applications [Conference Poster]. https://www.osti.gov/biblio/1593047
Lewis, R.M., Missert, N., Henry, M.D., Frank, M.P., Wolak, M., Young, T., & Young, T. (2018). Measuring changes in inductance with microstrip resonators [Conference Poster]. https://doi.org/10.1109/TASC.2019.2899867
Wildey, T., Butler, T., Jakeman, J.D., & Jakeman, J.D. (2018). The Consistent Bayesian Approach for Stochastic Inverse Problems [Conference Poster]. https://www.osti.gov/biblio/1592669
Gastelum, Z.N., Thomas, M., Shead, T.M., & Shead, T.M. (2018). Semantic Graphs for Safeguards Data Integration, Pattern Matching, and Event Classification [Conference Poster]. https://www.osti.gov/biblio/1884099
Ibanez-Granados, D.A., Love, E., Voth, T., Overfelt, J.R., Roberts, N.V., Hansen, G.A., & Hansen, G.A. (2018). LGR: Lagrangian Grid Reconnection Shock Hydro [Conference Poster]. https://www.osti.gov/biblio/1593639
Burgess, W. (2018). Atlassian Tools for ITSM and Project Management [Presentation]. https://www.osti.gov/biblio/1593655
Weiss, C.J., Beskardes, G.D., van Bloemen Waanders, B.G., & van Bloemen Waanders, B.G. (2018). Hierarchical material property representation in finite element analysis: Convergence behavior and the response of vertical fracture sets [Conference Poster]. https://doi.org/10.1190/segam2018-2998297.1
Gallis, M.A., Torczynski, J.R., Bitter, N., Koehler, T.P., Moore, S.G., Plimpton, S.J., Papadakis, G., & Papadakis, G. (2018). DSMC Simulations of Turbulent Flows at Moderate Reynolds Numbers [Conference Poster]. https://doi.org/10.1063/1.5119564
Specht, P.E., Adams, D.P., Mitchell, J.A., Silling, S.A., Brown, J.L., Wise, J.L., Brown, D., Palmer, T., & Palmer, T. (2018). Response of Wrought and Additively Manufactured 304L Stainless Steel Under High Pressure High Strain-Rate Loading [Conference Poster]. https://www.osti.gov/biblio/1806931
Jock, R.M., Rudolph, M., Jacobson, N.T., Ward, D.R., Harvey-Collard, P., Bureau-Oxton, C., Srinivasa, V., Mounce, A.M., Anderson, J.M., Manginell, R., Wendt, J.R., Pluym, T., Baczewski, A.D., Grace, M.D., Witzel, W., Carroll, M.S., & Carroll, M.S. (2018). Spin-Orbit Qubits in the Sandia Silicon MOS Multi-QD Platform [Conference Poster]. https://www.osti.gov/biblio/1593003
Glusa, C. (2018). RefMaxwell - MueLu's Maxwell solver [Presentation]. https://www.osti.gov/biblio/1593000
Rodriguez, J.S., Nicholson, B.L., Siirola, J.D., Laird, C., & Laird, C. (2018). PyNumero: Python Numerical Optimization [Conference Poster]. https://www.osti.gov/biblio/1592615
Guba, O., Bosler, P.A., Bradley, A.M., Golaz, C., Taylor, M.A., Barnett, G.A., & Barnett, G.A. (2018). Semi-Lagrangian transport in the atmospheric dycore of E3SM [Conference Poster]. https://www.osti.gov/biblio/1592361
Lofstead, G.F., Baker, J., Younge, A.J., & Younge, A.J. (2018). Data Pallets For Traceable Data [Conference Poster]. https://www.osti.gov/biblio/1592374
Mariner, P.E., Swiler, L.P., Frederick, J.M., & Frederick, J.M. (2018). High Fidelity Surrogate Modeling of Fuel Dissolution for Probabilistic Assessment of Repository Performance [Conference Poster]. https://www.osti.gov/biblio/1593061
Link, H.E., Richter, S.N., Leung, V.J., Brost, R., Phillips, C.A., Staid, A., & Staid, A. (2018). Statistical Models of Dengue Fever [Conference Poster]. https://doi.org/10.1007/978-981-13-6661-1_14
Yasar, A., Rajamanickam, S., Wolf, M., Berry, J., Catalyurek, U., & Catalyurek, U. (2018). Fast Linear Algebra-Based Triangle Analytics with Kokkos Kernels [Conference Poster]. https://www.osti.gov/biblio/1592563
Thierry, D., Nicholson, B.L., Biegler, L., & Biegler, L. (2018). A Sensitivity-Based Nonlinear Model Predictive Control and State-Estimation Framework in Python [Conference Poster]. https://www.osti.gov/biblio/1592543
Hart, W.E., Siirola, J.D., & Siirola, J.D. (2018). Some Perspectives on Testing and Continuous Integration for Open Source Software [Presentation]. https://www.osti.gov/biblio/1592549
Frank, M.P. (2018). Improved superconducting logic families (asynchronous ballistic reversible etc.) - A difficult engineering challenge for SCE [Conference Poster]. https://www.osti.gov/biblio/1592362
Lofstead, G.F., Mitchell, J.A., & Mitchell, J.A. (2018). Lazy Minimal Eventually Consistent IO with Stitch [Conference Poster]. https://www.osti.gov/biblio/1592373
Moreland, K. (2018). The ParaView Tutorial Slides (Version 5.6) [Presentation]. https://www.osti.gov/biblio/1593587
Schultz, P.A. (2018). Modelling Charged Defects in Non-Cubic Semiconductors for Radiation Effects Studies in Next Generation Materials. https://doi.org/10.2172/1481589
Bureau-Oxton, C., Rudinger, K.M., Jacobson, N.T., Ward, D.R., Anderson, J.M., Manginell, R., Wendt, J.R., Pluym, T., Lilly, M.P., Pioro-Ladriere, M., Luhman, D.R., Carroll, M.S., & Carroll, M.S. (2018). Analyzing the fidelity of a singlet-triplet spin-orbit qubit in silicon using gate set tomography [Conference Poster]. https://www.osti.gov/biblio/1592542
Jacobson, N.T. (2018). For better or for worse: spin-orbit coupling and its physical manifestations in Si quantum dot qubits [Conference Poster]. https://www.osti.gov/biblio/1592375
Roach, R.A., Argibay, N., Allen, K., Balch, D., Beghini, L., Bishop, J.E., Boyce, B.L., Brown, J.A., Burchard, R.L., Chandross, M., Cook, A.W., Diantonio, C., Dressler, A.D., Forrest, E.C., Ford, K., Ivanoff, T., Jared, B.H., Johnson, K.L., Kammler, D., … Trembacki, B.L. (2018). Born Qualified Grand Challenge LDRD Final Report. https://doi.org/10.2172/1481619
Moreland, K. (2018). Comparing Binary-Swap Algorithms for Odd Factors of Processes [Conference Poster]. 2018 IEEE 8th Symposium on Large Data Analysis and Visualization, LDAV 2018. https://doi.org/10.1109/LDAV.2018.8739210
Schultz, P.A., Hjalmarson, H.P., & Hjalmarson, H.P. (2018). From first-principles defect chemistry to device damage models of radiation effects in III-V semiconductors [Conference Poster]. https://www.osti.gov/biblio/1593578
Speed, A., Woo, B.L., Kouhestani, C.G., Stubbs, J., Birch, G., & Birch, G. (2018). Physical Security Operators and Cognitive Science [Conference Poster]. https://www.osti.gov/biblio/1592349
Staid, A. (2018). Grid Security and Resilience [Presentation]. https://www.osti.gov/biblio/1592676
Phillips, E. (2018). Trilinos Discretization Tools in EMPIRE-PIC [Conference Poster]. https://www.osti.gov/biblio/1592678
Baczewski, A.D. (2018). Useful quantum simulation: How classical and quantum computers can team up to tackle matters of substance [Presentation]. https://www.osti.gov/biblio/1593009
Devine, K. (2018). Tpetra and Data Services [Presentation]. https://www.osti.gov/biblio/1593021
Stein, E., Swiler, L.P., Sevougian, S.D., & Sevougian, S.D. (2018). Comparison of Probabilistic Sensitivity Analysis Methods Applied to a 3-D Reference Case Performance Assessment Dataset from GDSA Framework [Conference Poster]. https://www.osti.gov/biblio/1592668
Kuether, R.J., Allensworth, B.M., Backer, A., Chen, E.Y., Dingreville, R.P.M., Forrest, E.C., Knepper, R., Tappan, A.S., Marquez, M.P., Vasiliauskas, J.G., Rupper, S., Grant, M.J., Atencio, L.C., Hipple, T., Maes, D., Timlin, J.A., Ma, T.J., Garcia, R.J., Danford, F.L., … Swiler, L.P. (2018). Posters for AA/CE Reception [Presentation]. https://www.osti.gov/biblio/1592652
Wood, M.A., Cusentino, M.A., Thompson, A.P., & Thompson, A.P. (2018). Scale-bridging from the Atoms Up; Employing Machine Learning to Improve the Accuracy and Scalability of MD Mitchell Wood Mary Alice Cusentino and Aidan Thompson Center for Computing Research Sandia National Labs [Conference Poster]. https://www.osti.gov/biblio/1592653
Wolf, M. (2018). High-Performance Portable Data Analytics Software Using the Kokkos Ecosystem [Conference Poster]. https://www.osti.gov/biblio/1592658
Torczynski, J.R., Gallis, M.A., Bitter, N., Koehler, T.P., Plimpton, S.J., Papadakis, G., & Papadakis, G. (2018). Molecular-Gas-Dynamics Simulation of Turbulent Minimal Couette Flow [Conference Poster]. https://www.osti.gov/biblio/1592604
Rodriguez, J.S., Nicholson, B.L., Zavala, V., Laird, C., & Laird, C. (2018). Decomposition Strategies for Non-convex Nonlinear Programs [Conference Poster]. https://www.osti.gov/biblio/1592614
Lawson, M., Lofstead, G.F., & Lofstead, G.F. (2018). Using a Robust Metadata Management System to Accelerate Scientific Discovery at Extreme Scales [Conference Poster]. https://doi.org/10.1109/PDSW-DISCS.2018.00004
Ivanoff, T., Madison, J., Koepke, J.R., Swaller, E., Jared, B.H., Mitchell, J.A., Swiler, L.P., & Swiler, L.P. (2018). 3D Registration of Structure, Melt Pool History and Design in AM 316L Stainless Steel [Conference Poster]. https://www.osti.gov/biblio/1884475
Wildey, T., Marvin, B., Bui-Thanh, T., & Bui-Thanh, T. (2018). Scalable Approximations for the Consistent Bayes Method [Conference Poster]. https://www.osti.gov/biblio/1594647
Wang, F., Quach, T.T., Wheeler, J.W., Aimone, J.B., James, C.D., & James, C.D. (2018). Sparse coding for N-gram feature extraction and training for file fragment classification. IEEE Transactions on Information Forensics and Security, 13(10), pp. 2553-2562. https://doi.org/10.1109/TIFS.2018.2823697
Aimone, J.B., Hamilton, K.E., Mniszewski, S., Reeder, L., Schuman, C.D., Severa, W., & Severa, W. (2018). Non-Neural Network Applications for Spiking Neuromorphic Hardware [Conference Poster]. https://www.osti.gov/biblio/1882371
Tranchida, J., Cea, P.T., Nicolis, S., & Nicolis, S. (2018). Hierarchies of Landau-Lifshitz-Bloch equations for nanomagnets: A functional integral framework. Physical Review E, 98(4). https://doi.org/10.1103/PhysRevE.98.042101
Cyr, E.C., Beckwith, K., Bettencourt, M.T., Cartwright, K.L., Kramer, R.M.J., Miller, S., Pawlowski, R., Phillips, E., Roberts, N.V., Shadid, J.N., & Shadid, J.N. (2018). EMPIRE-Fluid: Towards Multi-Fluid Plasma Simulations for EMP [Conference Poster]. https://www.osti.gov/biblio/1594328
Scholten, T.L. (2018). Towards Scalable Characterization of Noisy Intermediate-Scale Quantum Information Processors. https://www.osti.gov/biblio/1481620
Stein, E., Swiler, L.P., Sevougian, S.D., & Sevougian, S.D. (2018). Sensitivity Analysis of Dessel Dataset with SNL's Dakota [Presentation]. https://www.osti.gov/biblio/1594648
Lofstead, G.F., Younge, A.J., Baker, J., & Baker, J. (2018). End-to-end Provenance Traceability and Reproducibility Through "Palletized'' Simulation Data. https://doi.org/10.2172/1531316
McGregor, D.A.O., Robinson, A.C., & Robinson, A.C. (2018). Charge Conservative ALE for Single Fluid Plasmas [Presentation]. https://www.osti.gov/biblio/1594638
Younge, A.J., Agelastos, A.M., Lofstead, G.F., Warren, A., & Warren, A. (2018). Quantifying Metrics to Evaluate Containers for Deployment and Usage of NNSA Production Applications [Conference Poster]. https://www.osti.gov/biblio/1594332
Heroux, M.A., Barba, L.A., Parashar, M., Stodden, V., Taufer, M., & Taufer, M. (2018). Toward a Compatible Reproducibility Taxonomy for Computational and Computing Sciences. https://doi.org/10.2172/1481626
Swiler, L.P., van Bloemen Waanders, B.G., Jared, B.H., Koepke, J.R., Whetten, S.R., Madison, J., Ivanoff, T., Bachman, W.B., Cook, A.W., Brown-Shaklee, H.J., Kammler, D., Johnson, K.L., Ford, K., Bishop, J.E., Roach, R.A., & Roach, R.A. (2018). Data Analysis for the Born Qualified Grand LDRD Project. https://doi.org/10.2172/1481602
Burgess, W. (2018). Scrum and an R&D Project [Presentation]. https://www.osti.gov/biblio/1593654
Brost, R., Carrier, E.E., Carroll, M.J., Groth, K.M., Kegelmeyer, W.P., Leung, V.J., Link, H.E., Patterson, A.J., Phillips, C.A., Richter, S., Robinson, D.G., Staid, A., Woodbridge, D.M.K., & Woodbridge, D.M.K. (2018). Adverse Event Prediction Using Graph-Augmented Temporal Analysis (Final Report). https://doi.org/10.2172/1530166
Stein, E., Swiler, L.P., Sevougian, S.D., & Sevougian, S.D. (2018). GDSA Framework: Comparison of Sensitivity Analysis Methods Applied to a Reference Case Repository in Shale [Conference Poster]. https://www.osti.gov/biblio/1594335
Moreland, K. (2018). ATDM/ECP Milestone Memo WBS 2.3.4.04 / SNL ATDM Data and Visualization Projects STDV04-20 - [MS4/YR2] Document/Tune performance of VTK-m algorithms on ATS-1. https://doi.org/10.2172/1481597
Kuberry, P., Bosler, P.A., Trask, N.A., Perego, M., Peterson, K., Bochev, P., & Bochev, P. (2018). The Compadre Toolkit [Conference Poster]. https://www.osti.gov/biblio/1594258
Peterson, K., Perego, M., Frederick, J.M., Wheeler, L.B., Bosler, P.A., Ruffing, A.M., Davis, R.W., Whitmore, L.S., Poorey, K., Williams, K.P., Roesler, E.L., Bryan, P.F., Salinger, A.G., Hardesty, J., Tidwell, V.C., Singh, A.K., & Singh, A.K. (2018). SNL/BER Review 2018 [Presentation]. https://www.osti.gov/biblio/1594318
Verzi, S.J., Rothganger, F., Parekh, O., Quach, T.T., Miner, N.E., Vineyard, C.M., James, C.D., Aimone, J.B., & Aimone, J.B. (2018). Computing with spikes: The advantage of fine-grained timing. Neural Computation, 30(10), pp. 2660-2690. https://doi.org/10.1162/neco_a_01113
Jeffers, R., Staid, A., Baca, M., Currie, F.M., Fogleman, W.E., Derosa, S., Wachtel, A., Outkin, A.V., & Outkin, A.V. (2018). Analysis of Microgrid Locations Benefitting Community Resilience for Puerto Rico. https://doi.org/10.2172/1530167
Bernholdt, D.E., Boehm, S., Bosilca, G., Venkata, M.G., Grant, R., Naughton, T., Pritchard, H.P., Schulz, M., Vallee, G.R., & Vallee, G.R. (2018). A survey of MPI usage in the US exascale computing project. Concurrency and Computation. Practice and Experience, 32(3). https://doi.org/10.1002/cpe.4851