https://github.com/open-atmos/PySDM

• option to use a non-constant timescale in the relaxed velocity dynamic (#1114) - @bradybhalla

• breakup function renaming withing backend code (#1126) - @abulenok
• phasing out "q" var naming in favour of "water_vapour_mixing_ratio", etc (#1131)
• updates to the Grabowski & Pawlowska 2023 example: condensation tolerance, ripening rate (#1129) - @AgnieszkaMakulska
• cleaning up code that triggered redefined-outer-name pylint warning in pytest fixtures and notebook-embedded function definitions (#1133)
• ensuring all classes are accessible after importing only the main PySDM package (#1135)

• new example notebooks and smoke tests covering complete set of figures from Grabowski & Pawlowska 2023
• new product base class: _ActivationFilteredProduct
• new products based on the above: ActivatedParticleConcentration, ActivatedParticleSpecificConcentration, ActivatedMeanRadius
• new size-spectral products: MeanVolumeRadius, AreaStandardDeviation, RadiusStandardDeviation, VolumeStandardDeviation
• new attribute: EquilibriumSupersaturation
• cleanups in Yang_et_al_2018 example (incl. using the above new products instead of manually computing the activation-filtered quantities)

kudos @AgnieszkaMakulska!

• switching from "n" to "multiplicity" for attribute key (#1123)
• improving reporting of filenames in pytest example test suites (#1121)

• linear (instead of constant) density/pressure profile for condensation in parcel environment (kudos @mikhailmints)
• updates in immersion freezing example to match arXiv-uploaded figures
• using the CI env var to trigger FakeThrust (thus making it easier to locally reproduce CI behaviour)
• renumbered figured in de Jong et al. breakup example to match final paper
• new tests (codecov now reports 80%!), code cleanups

• RelaxedVelocity dynamic (allowing for relaxation to terminal speeds) and relative fall velocity attribute refactor
• mermaid diagrams in README depicting PySDM submodule organisation and what's being passed where in the hello-world example

thanks to @bradybhalla and @edejong-caltech!

• PySDM-examples repo contents moved into PySDM repo (retaining separate PyPI packages)
• introducing test suites to shorten time-to-completion of CI runs
• switching from BDF to LSODA SciPy solver for condensation tests
• speeding up super-droplet count product
• using devops_tests in CI to share common test code across open-atmos projects
• more test cases added for test_n_breakups
• clarified literature references (incl. class dependency structure) in latent heat, diffusion kinetics and diffusion thermics formulae

thanks @claresinger, @abulenok and @AgnieszkaMakulska for contributions, reviews and issue reports.

• updated multi-step breakup algorithm (kudos @abulenok & @edejong-caltech)

• Fixes to Straub fragmentation function and sampling methods
• addition of (draft of) LowList1982 fragmentation function and coalescence efficiency

kudos @edejong-caltech, thanks @abulenok for reviews and help!

• breakup internals fixes, refactors and cleanups - kudos @edejong-caltech & @abulenok
• smoke tests comparing against analytic solution of SCE with breakup terms (Srivastava 1982) - kudos @abulenok
• added ConstantSize breakup fragmentation function

• making spatial, spectral and spectro-glacial sampling reproducible (obeying seed settings in Formulae)
• replace uses of debug-intended (and slow) __setitem__ (e.g., within frag functions) with newly introduced fill() Storage method
• remove unused fields (vmax and x_plus_y) from AlwaysN frag fun
• enabling --durations reports in pytest logs
• CI workflows cleanups (grouping readme-snippets jobs, renaming)

• enabling breakup smoke tests on GPU - kudos @abulenok!
• reflecting github org change in readme, docstrings, etc
• JOSS v2 paper updates (@claresinger & @edejong-caltech)
• minor code compatibility fixes for GPU
• minor collision code refactor: move cut_working_length call into adaptivity loop (thanks @piotrbartman)
• added zenodo-json-checking CI workflow
• added asserts for test_trickier_formula_vectorised (thanks @douglowe for reporting it)
• instantaneous ice melting support (as in Shima et al. 2020) as an option for Freezing dynamic (disabled by default)

• major updates in collision methods (mostly GPU support for breakup, but also CPU refactors and cleanups & improved test coverage) - kudos @abulenok!
• numerous updates to FakeThrustRTC to support the above - kudos @abulenok
• cleanups and docstrings in Formulae-related code - kudos @abulenok
• clarification (significant) in displacement methods arg names (omega -> position_in_cell) - kudos @piotrbartman
• fragmentation functions moved (partially) into physics submodule
• introducing ConcentrationProduct base class supporting standard-temperature-and-pressure (STP) normalisation
• Multiplicities::MAX_VALUE and unit test (+usage in breakup dynamics)
• .zenodo.json file added to streamline Zenodo metadata provision

• fragmentation functions for GPU backend (@abulenok)
• implement flag_zero_multiplicity on GPU backend within a Commons struct (@abulenok)
• new pair and storage methods for GPU: min_pair, multiply_pair and divide_if_not_zero (@abulenok)
• made ABIFM immersion freezing logic employ supersaturation constraint (to be consistent with analogous condition in INAS logic)
• breakup algorithm: fix an issue with zero multiplicities (introduced max(round(nj), 1)) (@edejong-caltech)
• shift from per-gridbox to per-kg units in rate product (@edejong-caltech)
• smoke test for Bieli et al. example (@edejong-caltech)
• make CPU find_pairs correctly handle the length argument (@abulenok)
• added Python 3.10 to CI runs
• added smoke tests with 0D simulations covering breakup (upcoming deJong et al. paper)

• smoke test comparing dry/wet equilibrium calculation against PyPartMC (thanks @zdaq12)
• avoiding divide-by-zero warnings in EffectiveRadius product
• fix physical unit in size-spectrum products (thanks @sajjadazimi)
• better array-valued argument handling in Formulae methods using numba.vectorize (thanks @claresinger)
• new method: Builder::replace_dynamic() (@edejong-caltech)
• handling NVRTC_PATH env var to point ThrustRTC to non-standard location of nVidia libs (@abulenok)
• new backend methods: min_pair, divide_if_not_zero (@edejong-caltech)
• GPU support for freezing
• 3D displacement incl. GPU support (@abulenok)
• Straub fragmentation function (@edejong-caltech)
• breakup algorithm improvements incl. reworked limiter logic, fragment_size instead of min_volume, fragmentation function updates (@edejong-caltech)
• backends: fixed __init__ calls in multiple-inheritance contexts
• FakeThrust fixes to better match ThrustRTC API (@abulenok)
• make formulae available at attribute mapper scope so request_attribute can be called without constraints
• storage, attribute, mesh common code: improved test coverage, cleanups, docstrings (@abulenok!)
• multi-stage Github Actions workflow (pylint, no-numba unit tests, etc first, only then run all the tests
• updates to make the code clean with newer versions of pylint
• new tests for displacement, freezing, breakup, mesh, builder, formulae and storage logic

• major updates in breakup algorithmics (no more while loop, fixes) and test coverage - thanks @edejong-caltech!
• new surface-tension model tests + code fixes and cleanups - thanks @claresinger
• new product: averaged terminal velocity - thanks @sajjadazimi
• new freezing-related products: IceNucleiConcentration, FrozenParticleConcentration
• new attribute: WetToCriticalVolumeRatio
• added Fierce diagrams as a test for differences between full and linearised kappa-Koehler formulae - thanks @nriemer for hint!

• fixing version indicators for dependencies in pypi.org-published files (regression introduced when automating package uploads)
• option to toggle overflow warning in the breakup dynamic (thanks @edejong-caltech)
• replacing r_crit<r_dry errors in wet-size equilibrium calculations with r_wet=r_dry setting (workaround for big-f_org/small-sized aerosols, thanks @claresinger)
• immersion freezing cleaups
• cleaning up imports from deprecated packages in SciPy (just subpackage naming changes)

• fragmentation limiters (by @edejong-caltech)
• 1D VTK and nceCDF exporters (by @sajjadazimi)
• PyPI release automation through GitHub Actions
• introducing test-time-dependency on PyPartMC

• option to skip thd update in condensation dynamic added (for KiD example, kudos @sajjadazimi!)
• JOSS PySDM v2 paper updates (kudos @edejong-caltech & @claresinger)

• single-column environment and examples beef up (kudos @sajjadazimi)
• improved aerosol initialisation test coverage (kudos @claresinger)
• API change in aerosol initialisation (aerosol.aerosol_modes -> aerosol.modes)
• JOSS v2 paper progress