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44 results for “jedbrown”
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@jedbrown
> increase research income >10% by ignoring IP.So what you're saying is it is cheaper to account for getting sued for IP infringements and having to pay than to pay for it beforehand then?
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@jedbrown
> increase research income >10% by ignoring IP.So what you're saying is it is cheaper to account for getting sued for IP infringements and having to pay than to pay for it beforehand then?
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@jedbrown
> increase research income >10% by ignoring IP.So what you're saying is it is cheaper to account for getting sued for IP infringements and having to pay than to pay for it beforehand then?
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@jedbrown
> increase research income >10% by ignoring IP.So what you're saying is it is cheaper to account for getting sued for IP infringements and having to pay than to pay for it beforehand then?
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@jedbrown
> increase research income >10% by ignoring IP.So what you're saying is it is cheaper to account for getting sued for IP infringements and having to pay than to pay for it beforehand then?
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@gvwilson I mention numerical/scientific software because that's the area I work in, but also, our software lifecycle is long (many packages are over 30 years old) with a cultural appetite for excusing poor user and developer experience (cf. "Firetran" https://jedbrown.org/files/BrownKnepleySmith-RuntimeExtensibilityAndLibrarizationOfSimulationSoftware-2014.pdf).
Ex: For linear algebra, #PETSc represented a radical shift from the BLAS/LAPACK philosophy at the time. But PETSc has its share of baked-in architecture, as do mature packages throughout the ecosystem.
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@[email protected] Indeed, upgrading the #RiemannSolver to #HLLC (which includes a contact wave) from #HLL (which only estimates the acoustic waves) fixes this problem. Here's a pair of oblique bubble simulations to campare HLLC (left) with HLL (right). Unlike most cases with finite volume methods (which use Riemann solvers at every grid interface), a high quality solver is important for continuous Galerkin FE boundary conditions.
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@[email protected] Indeed, upgrading the #RiemannSolver to #HLLC (which includes a contact wave) from #HLL (which only estimates the acoustic waves) fixes this problem. Here's a pair of oblique bubble simulations to campare HLLC (left) with HLL (right). Unlike most cases with finite volume methods (which use Riemann solvers at every grid interface), a high quality solver is important for continuous Galerkin FE boundary conditions.
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@[email protected] Indeed, upgrading the #RiemannSolver to #HLLC (which includes a contact wave) from #HLL (which only estimates the acoustic waves) fixes this problem. Here's a pair of oblique bubble simulations to campare HLLC (left) with HLL (right). Unlike most cases with finite volume methods (which use Riemann solvers at every grid interface), a high quality solver is important for continuous Galerkin FE boundary conditions.
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@[email protected] Indeed, upgrading the #RiemannSolver to #HLLC (which includes a contact wave) from #HLL (which only estimates the acoustic waves) fixes this problem. Here's a pair of oblique bubble simulations to campare HLLC (left) with HLL (right). Unlike most cases with finite volume methods (which use Riemann solvers at every grid interface), a high quality solver is important for continuous Galerkin FE boundary conditions.
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Interesting paper by @jedbrown et al.
https://doi.org/10.48550/arXiv.2401.13196
For computational mechanics/physics, if you code by just punching in the equations from the textbooks directly, the physics should work, but computationally the way you evaluate the quantities may be unstable. This paper lists some recipes to avoid these.
Mostly small strain problem, but still feels icky to leave in.
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@fclc @hattom @jedbrown this is great news ! Could you forward the thread to me ? I heard they were doing that but I would like to update the community build I am working on to reflect that .. #volunteersneeded
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Have just successfully evaluated a Green's fct. matrix via #rustlang and #applemetal on Apple Silicon GPU Cores. Holiday programming project coming along well 😃
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What if Everything is Free? Exploring The #LibraryOfThings Concept
"Research has shown that people are increasingly open to collaborative consumption, with studies indicating a rising willingness to share goods instead of purchasing them outright."
by Jed Brown, Feb 19, 2025
"In today’s consumer-driven society, the idea of ownership is so deeply ingrained that imagining a world where everything is free can seem radical — if not downright impossible.
Yet, emerging initiatives like the Library of Things invite us to reconsider our relationship with material goods. Rather than accumulating items, communities are experimenting with a model where objects are shared rather than owned."
Read more:
https://medium.com/@jedbrown99/what-if-everything-is-free-f52874528afc#SolarPunkSunday #SharingEconomy #LibrariesOfThings #BorrowDontBuy #Degrowth #LibrariesOfThings #Decapitalize
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PSA: #ParkMobile either sells their address books to phishers or their databases were hacked and they haven't informed customers. It's a good thing they don't have a monopoly or anything.
(I use a unique email address and recently started receiving low-budget phishing attempts at that address.)
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🚀 #PETSc 3.21 was released today. There were a number of new contributors this release; thank you all.
https://lists.mcs.anl.gov/pipermail/petsc-announce/2024/000115.htmlA few highlights:
* VecMDot and (optionally) VecMAXPY can identify strided memory and use gemv when applicable. This is faster than home-rolled kernels on some GPUs.
* GAMG: new filtering and smoothing options for algebraic multigrid.
* Small subdomain (many per process) BDDC support
* Trust region and quasi-Newton trust region improvements. -
Amazing work from Sarah El-Kazdadi. #LibXSMM has become standard for applications needing small, dense matrix multiply/tensor contraction. It uses JIT, which was widely believed to be necessary to achieve high performance in this domain. Sarah's new library, #nanogemm, is competitive or better without JIT (modulo a caveat about padding). #Rust #HPC #GEMM
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Amazing work from Sarah El-Kazdadi. #LibXSMM has become standard for applications needing small, dense matrix multiply/tensor contraction. It uses JIT, which was widely believed to be necessary to achieve high performance in this domain. Sarah's new library, #nanogemm, is competitive or better without JIT (modulo a caveat about padding). #Rust #HPC #GEMM
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Amazing work from Sarah El-Kazdadi. #LibXSMM has become standard for applications needing small, dense matrix multiply/tensor contraction. It uses JIT, which was widely believed to be necessary to achieve high performance in this domain. Sarah's new library, #nanogemm, is competitive or better without JIT (modulo a caveat about padding). #Rust #HPC #GEMM
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Amazing work from Sarah El-Kazdadi. #LibXSMM has become standard for applications needing small, dense matrix multiply/tensor contraction. It uses JIT, which was widely believed to be necessary to achieve high performance in this domain. Sarah's new library, #nanogemm, is competitive or better without JIT (modulo a caveat about padding). #Rust #HPC #GEMM
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Amazing work from Sarah El-Kazdadi. #LibXSMM has become standard for applications needing small, dense matrix multiply/tensor contraction. It uses JIT, which was widely believed to be necessary to achieve high performance in this domain. Sarah's new library, #nanogemm, is competitive or better without JIT (modulo a caveat about padding). #Rust #HPC #GEMM
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The #CUBoulder Department of Ethnic Studies wrote a powerful justice-oriented statement a few weeks ago calling for a ceasefire and Palestinian liberation, explicitly informed by intersectional, anti-racist, and decolonial feminist, queer, and trans scholarship. They immediately came under fire from many sources, including the Chancellor, President, and the local newspaper. I stand with the Department's freedom of expression, and have signed this letter.
https://www.change.org/p/reaffirming-academic-freedom-at-cu-boulder-in-a-time-of-war
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Congratulations to Field van Zee and Devin Matthews (and the grater #BLIS community) on being selected for the 2023 Wilkinson Prize in Numerical Software. This prize is awarded once every 4 years. BLIS (https://github.com/flame/blis) provides a clean separation of concerns for high performance dense #LinearAlgebra, with minimal arch-specific code to achieve top performance across hardware, and enabling sharp analytic modeling.
#SIAM #HPC -
Newsom's veto of #SB403 looks even worse:
“I never knew Newsom until I met him there,” Kapur said. “You know, I raised money for Kamala Harris when she ran for the presidency, because she’s my DNA. And if he (Newsom) runs for the …” he tapered off. “Maybe that was part of the message too.”
[...]
“I wanted him to know that you don’t take the Indian American community for granted,” Kapur said. “There’ll be a knife fight after (2024) between Newsom and her (Harris).”
https://www.sfchronicle.com/california/article/newsom-caste-law-veto-18434287.php -
Newsom's veto of #SB403 looks even worse:
“I never knew Newsom until I met him there,” Kapur said. “You know, I raised money for Kamala Harris when she ran for the presidency, because she’s my DNA. And if he (Newsom) runs for the …” he tapered off. “Maybe that was part of the message too.”
[...]
“I wanted him to know that you don’t take the Indian American community for granted,” Kapur said. “There’ll be a knife fight after (2024) between Newsom and her (Harris).”
https://www.sfchronicle.com/california/article/newsom-caste-law-veto-18434287.php -
Newsom's veto of #SB403 looks even worse:
“I never knew Newsom until I met him there,” Kapur said. “You know, I raised money for Kamala Harris when she ran for the presidency, because she’s my DNA. And if he (Newsom) runs for the …” he tapered off. “Maybe that was part of the message too.”
[...]
“I wanted him to know that you don’t take the Indian American community for granted,” Kapur said. “There’ll be a knife fight after (2024) between Newsom and her (Harris).”
https://www.sfchronicle.com/california/article/newsom-caste-law-veto-18434287.php -
Newsom's veto of #SB403 looks even worse:
“I never knew Newsom until I met him there,” Kapur said. “You know, I raised money for Kamala Harris when she ran for the presidency, because she’s my DNA. And if he (Newsom) runs for the …” he tapered off. “Maybe that was part of the message too.”
[...]
“I wanted him to know that you don’t take the Indian American community for granted,” Kapur said. “There’ll be a knife fight after (2024) between Newsom and her (Harris).”
https://www.sfchronicle.com/california/article/newsom-caste-law-veto-18434287.php -
Newsom's veto of #SB403 looks even worse:
“I never knew Newsom until I met him there,” Kapur said. “You know, I raised money for Kamala Harris when she ran for the presidency, because she’s my DNA. And if he (Newsom) runs for the …” he tapered off. “Maybe that was part of the message too.”
[...]
“I wanted him to know that you don’t take the Indian American community for granted,” Kapur said. “There’ll be a knife fight after (2024) between Newsom and her (Harris).”
https://www.sfchronicle.com/california/article/newsom-caste-law-veto-18434287.php -
In which Gavin Newsom bows to Hindu nationalists, presumably because he intends to run for president, and appeasing power is more politically expedient than justice. The veto rationalization is nonsense and he surely knows it. The amended version of this bill passed the CA Assembly 55-3 and the Senate 31-5. #CasteEquity #SB403
https://calmatters.org/politics/2023/10/caste-discrimination-newsom/
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In which Gavin Newsom bows to Hindu nationalists, presumably because he intends to run for president, and appeasing power is more politically expedient than justice. The veto rationalization is nonsense and he surely knows it. The amended version of this bill passed the CA Assembly 55-3 and the Senate 31-5. #CasteEquity #SB403
https://calmatters.org/politics/2023/10/caste-discrimination-newsom/