Tootfinder

Limits of manifolds with boundary
Takao Yamaguchi, Zhilang Zhang
https://arxiv.org/abs/2406.00970 https://arxiv.org/pdf/2406.00970

Limits of manifolds with boundary
In this paper, as a continuation of \cite{YZ:inrdius},we develop the geometry of the limit spaces of compact Riemannian manifolds with boundary, where we assume a lower sectional curvature bound,two sides bounds on the second fundamental forms of boundaries and an upper diameter bound. We mainly focus on the general case of non inradius collapse/convergence, where inradii of manifolds are uniformly bounded away from zero. In this case, many limit spaces have wild geometry, which arise from the …

Other socmed users out there sending each other jumpscares and rickrolls meanwhile tumblr is going through The Boopening™.
It's opt-in. You click on the boop button next to someone's username and a cat paw appears on your screen and they can boop you back and there is no limit to booping (two people were collectively responsible for booping me 94 times).
I have spent an absurd amount of time booping everyone who appears on my timeline, I love it.

"Yes, we can take good arable land which could grow human food, and use it to grow crops to use as feedstock to produce biofuel; but not much biofuel, because otherwise people starve. We can take surplus electricity that our grid can't yet handle and use it to split water to electrolise hydrogen; but not much hydrogen, because its an inefficient use of electricity which we're going to be critically short of anyway"

The Vision Thing
We live, these days, mainly, in states which are constituted as 'representative democracies' — which is to say, most people get to vote, once every few years, for one of a limited range of candidates from a limited range of parties. Our information about these parties, their representatives and their policies, comes partly from the parties themselves, but mostly from media which is controlled either by hyper-wealthy and usually highly corrupt elites, or by the state.

Quark orbital angular momentum in the proton from a twist-3 generalized parton distribution
M. Engelhardt, N. Hasan, S. Krieg, S. Liuti, S. Meinel, J. Negele, A. Pochinsky, M. Rodekamp, S. Syritsyn
https://arxiv.org/abs/2406.00845

Quark orbital angular momentum in the proton from a twist-3 generalized parton distribution
Quark orbital angular momentum in the proton is evaluated via a Lattice QCD calculation of the second Mellin moment of the twist-3 generalized parton distribution $\widetilde{E}_{2T} $ in the forward limit. The connection between this approach to quark orbital angular momentum and approaches previously utilized in Lattice QCD calculations, via generalized transverse momentum-dependent parton distributions and via Ji's sum rule, is reviewed. This connection can be given in terms of Lorentz invar…

Effective internal language model training and fusion for factorized transducer model
Jinxi Guo, Niko Moritz, Yingyi Ma, Frank Seide, Chunyang Wu, Jay Mahadeokar, Ozlem Kalinli, Christian Fuegen, Mike Seltzer
https://arxiv.org/abs/2404.01716

Effective internal language model training and fusion for factorized transducer model
The internal language model (ILM) of the neural transducer has been widely studied. In most prior work, it is mainly used for estimating the ILM score and is subsequently subtracted during inference to facilitate improved integration with external language models. Recently, various of factorized transducer models have been proposed, which explicitly embrace a standalone internal language model for non-blank token prediction. However, even with the adoption of factorized transducer models, limit…

On the inefficiency of fermion level-crossing under the parity-violating spin-2 gravitational field
Kohei Kamada, Jun'ya Kume
https://arxiv.org/abs/2404.19726 https://arxiv.org/pdf/2404.19726
arXiv:2404.19726v1 Announce Type: new
Abstract: Gravitational chiral anomaly connects the topological charge of spacetime and the chirality of fermions. It has been known that the chirality is carried by the particles (or the excited states) and also by vacuum. While the gravitational anomaly equation has been applied to cosmology, distinction between these two contributions has been rarely discussed. In the study of gravitational leptogenesis, for example, lepton asymmetry associated with the chiral gravitational waves sourced during inflation is evaluated only by integrating the anomaly equation. How these two contributions are distributed has not been seriously investigated. Meanwhile, a dominance of vacuum contribution is observed in some specific types of Bianchi spacetime with parity-violating gravitational fields, whose application to cosmology is not straightforward. One may wonder whether such a vacuum dominance takes place also in the system with chiral gravitational waves around the flat background, which is more suitable for application to realistic cosmology. In this work, we apply an analogy between U(1) electromagnetism and the weak gravity to the spacetime that resembles the one considered in the gravitational leptogenesis scenario. This approach allows us to obtain intuitive understanding of the fermion chirality generation under the parity-violating spin-2 gravitational field. By assuming the emergence of Landau level-like dispersion relation in our setup, we conjecture that level-crossing does not seem to be efficient while the charge accumulation in the vacuum likely takes place. Phenomenological implication is also discussed in the context of gravitational leptogenesis.

Does there exist the applicability limit of PDE to describe physical phenomena? -- A personal survey of Quantization, QED, Turbulence
Atsushi Inoue
https://arxiv.org/abs/2405.00045

Does there exist the applicability limit of PDE to describe physical phenomena? -- A personal survey of Quantization, QED, Turbulence
What does it mean to study PDE(=Partial Differential Equation)? How and what to do "to claim proudly that I'm studying a certain PDE"? Newton mechanic uses mainly ODE(=Ordinary Differential Equation) and describes nicely movements of Sun, Moon and Earth etc. Now, so-called quantum phenomenum is described by, say Schrödinger equation, PDE which explains both wave and particle characters after quantization of ODE. The coupled Maxwell-Dirac equation is also "quantized" and QED(=Quantum Electro-Dy…

Summer Amplification of Wind Stilling and Land Warming Compounds Energy Risks in a Changing Climate
Gan Zhang
https://arxiv.org/abs/2405.20302 https://

Summer Amplification of Wind Stilling and Land Warming Compounds Energy Risks in a Changing Climate
Wind energy is key for reducing greenhouse gas emissions and meeting increasing energy demand. Long-term changes in wind resources were extensively studied but notable gaps remain. Meanwhile, the temporal changes and compounding risks received little attention. Here we analyze large-ensemble climate simulations and show that anthropogenic warming can contribute to significant wind stilling, particularly in the warm season of the northern hemisphere midlatitudes. The stilling is related to the a…

Dutch greenhouse gas #emissions down by 6% last year, to 34% below their 1990 level!
Emissions from electricity generation down 22% year-on-year thanks to more renewable, less fossil electricity.
Transport emissions up by 9% due to growth in aviation.

Greenhouse gas emissions 6 percent lower in 2023
Greenhouse gas (GHG) emissions were 6 percent lower in 2023 than in 2022. This was mainly due to 22 percent lower emissions in the electricity sector. Less electricity was produced from coal and natural gas. Statistics Netherlands (CBS) and the National Institute for Public Health and the Environment (RIVM)/Emissions Register report this on the basis of provisional quarterly figures on GHG emissions, in accordance with the IPCC guidelines.

One of the 5 people a day who, on average, are killed by motor vehicles in the UK.
Meanwhile our negligent government passes a stupid law on deaths caused by cyclists hitting pedestrians.
Chris Boardman was good on this on the wireless this morning.
Baby dies after being hit by Land Rover in church car park - BBC News

Baby dies after being hit by Land Rover in church car park
The incident happened at the Plymouth Brethren church car park in Balmedie, Aberdeenshire.