Tootfinder

I would say yes or at least very cheap. The Victorian government reduced rail costs and this has caused a boom in passengers using regional rail services.
As the cost of living continues to rise, should public transport be free in Australia? - ABC News
https://www.

As the cost of living continues to rise, should public transport be free in Australia?
Australia ranks among the most expensive countries in the world when it comes to the cost of public transport. But free fares might not be the solution. 

It's really hard to think of a more 'wrong-thinking' government than this one. Talk about focusing on the wrong stuff. https://www.rnz.co.nz/news/political/516658/watch-live-transport-minister-announces-n…

Happy #AFIR day to those who celebrate 🥳!
It comes with a little celebratory cake from the European Commission, the long-awaited Q&A on how the rules should be interpreted: 

Alternative Fuels Infrastructure
Regulation, Directive and Package

Ministry: Ukrainian hackers disrupt transport services in Russian cities: https://benborges.xyz/2024/03/13/ministry-ukrainian-hackers.html

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.

Hey friends, we just finished a 6h walk with about 600m elevation from #badWiessee to #lenggries
We walked some new and some well known trails. Enjoyed the sound of a stream and also cleaned up nature a bit.
Oh and everything by foot or public transport (train and bus). We've be…

Are the banning transport now? 👀 Tennessee lawmakers give final approval to 'chemtrails' bill
https://www.tennessean.com/story/news/politics/2024/04/01/tennessee-lawmakers-give-final-approva…

Tennessee lawmakers give final approval to 'chemtrails' bill
A Democrat attempted to push back with a tongue-in-cheek amendment to protect "a large and hairy human-like creature."

«Tandis que le Plan québécois des infrastructures (PQI) bonifie de 10% les sommes allouées au réseau routier pour la période 2024-2034, les investissements en infrastructure de transport collectif ne sont augmentés que de 0,29%.» Le message de la CAQ est clair: achetez vous un char. 😟
https:/…

Budget du Québec 2024: un prélude à l’austérité
Eric Girard déposait aujourd’hui son 6e

1/ Wusstet Ihr schon, dass ...
„Nackt unter Wölfen“ das in der #DDR mit einer Auflage von rund zwei Millionen das meistverkaufte Buch war?
Und nein, es ging darin nicht um FKK im Naturschutzgebiet, sondern um einen kleinen jüdischen Jungen, der von seinem Vater und (kommunistischen) Mithäftlingen im KZ Buchenwald versteckt und gerettet wurde.
Das Buch ist 1958 erschienen und hat den #Holocaust ganz klar thematisiert. Alle Jugendlichen haben das Buch in der Schule gelesen.
Die Stuttgarter Wochenzeitung Kontext schreibt darüber:
https://www.kontextwochenzeitung.de/zeitgeschehen/680/das-buchenwald-kind-9474.html
Ein Problem an der ganzen Geschichte war, dass es eine Liste für den Abtransport gab und der jüdische Junge gegen einen Sinto-Jungen ausgetauscht wurde. Jetzt gibt es aber Evidenz, dass dieser freiwillig mit nach Auschwitz gegangen ist, weil sein kleiner Bruder auch in dem Transport war. Siehe Artikel.

london_transport: London Transport Network
Multiplex network with 3 edge types representing links within the three layers of London train stations: Underground, Overground and DLR.
This network has 369 nodes and 441 edges.
Tags: Transportation, Public Transport, Multilayer, Weighted
https://net…

Gelukkig komt dit overeen met mijn lijstje. https://climatejustice.social/@GeofCox/112426730374252113

GeofCox (@GeofCox@climatejustice.social)
Attached: 1 image The Guardian asked hundreds of the world’s top climate scientists for their views on the most effective actions combating climate-ecological breakdown. The top 5 actions were: 1. Vote for representatives who pledge strong climate action. 2. Reduce flying and fossil fuel-powered transport in favour of electric and public transport. 3. Reduce meat consumption. 4. Reduce home heating or cooling emissions. 5. Join a campaign or protest group.

You Transport Me
#HashtagGames
#StarTrekASongOrMovie

Saßen auf Stamm - Schwerverletzte nach Unfall bei Maibaum-Transport #News #Nachrichten

Effect of electron-phonon coupling on thermal transport in metals: a Monte Carlo approach for solving the coupled electron-phonon Boltzmann transport equations
Jie Peng, W. Ryan Deskins, Maria Helena Braga, Anter El-Azab
https://arxiv.org/abs/2402.08150

Effect of electron-phonon coupling on thermal transport in metals: a Monte Carlo approach for solving the coupled electron-phonon Boltzmann transport equations
In this work, the effect of electron-phonon (e-ph) coupling on both electron and phonon transport of metals is investigated via first principles calculations. A Monte-Carlo (MC) approach for solving the coupled electron-phonon Boltzmann transport equations is developed to investigate thermal conductivity of metals. In this approach, the anisotropic electron band structure, phonon dispersion in the full Brillouin zone, and mode-dependent thermal relaxation time of electrons and phonons are calcu…

How much sense does it make to use hydrogen for road transport? For cars, the answer is pretty clear, although heavy subsidies are still keeping taxi projects in the air. Even for trucks, a major role no longer seems logical, now that (much more fuel-efficient) battery electric trucks are the mainstay of forecasts (including from the manufacturers themselves). Despite generous EU (and national, regional, local) subsidies, another major player is now showing remorse:

TotalEnergies pivot casts doubt on Europe's €28bn hydrogen truck bet
Long-haul trucking is considered one of the hardest activities to decarbonise. Industry experts differ on whe

If it makes anyone feel any better, I remember a story not long ago about Vancouver's Skytrain system being dependant on floppies and DOS. If it ain't broke (and mission critical).... I guess.
#oldtech #transport

This https://arxiv.org/abs/2303.11793 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csCV_…

Bridging Optimal Transport and Jacobian Regularization by Optimal Trajectory for Enhanced Adversarial Defense
Deep neural networks, particularly in vision tasks, are notably susceptible to adversarial perturbations. To overcome this challenge, developing a robust classifier is crucial. In light of the recent advancements in the robustness of classifiers, we delve deep into the intricacies of adversarial training and Jacobian regularization, two pivotal defenses. Our work is the first carefully analyzes and characterizes these two schools of approaches, both theoretically and empirically, to demonstrate…

This https://arxiv.org/abs/2310.04918 has been replaced.
link: https://scholar.google.com/scholar?q=a

SWAP: Sparse Entropic Wasserstein Regression for Robust Network Pruning
This study tackles the issue of neural network pruning that inaccurate gradients exist when computing the empirical Fisher Information Matrix (FIM). We introduce SWAP, an Entropic Wasserstein regression (EWR) network pruning formulation, capitalizing on the geometric attributes of the optimal transport (OT) problem. The "swap" of a commonly used standard linear regression (LR) with the EWR in optimization is analytically showcased to excel in noise mitigation by adopting neighborhood interpolat…

This https://arxiv.org/abs/2403.04259 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Decentralized and Equitable Optimal Transport
This paper considers the decentralized (discrete) optimal transport (D-OT) problem. In this setting, a network of agents seeks to design a transportation plan jointly, where the cost function is the sum of privately held costs for each agent. We reformulate the D-OT problem as a constraint-coupled optimization problem and propose a single-loop decentralized algorithm with an iteration complexity of O(1/ε) that matches existing centralized first-order approaches. Moreover, we propose the decent…

This https://arxiv.org/abs/2311.00232 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csRO_…

Mechanically-Inflatable Bio-Inspired Locomotion for Robotic Pipeline Inspection
Pipelines, vital for fluid transport, pose an important yet challenging inspection task, particularly in small, flexible biological systems, that robots have yet to master. In this study, we explored the development of an innovative robot inspired by the ovipositor of parasitic wasps to navigate and inspect pipelines. The robot features a flexible locomotion system that adapts to different tube sizes and shapes through a mechanical inflation technique. The flexible locomotion system employs a r…

Spin-resolved counting statistics as a sensitive probe of spin correlation in transport through a quantum dot spin valve
Guanjian Hu, Shikuan Wang, Jing Hu, RuiQiang Li, Yiying Yan, JunYan Luo
https://arxiv.org/abs/2403.08621

Spin-resolved counting statistics as a sensitive probe of spin correlation in transport through a quantum dot spin valve
We investigate the noise in spin transport through a single quantum dot (QD) tunnel coupled to ferromagnetic electrodes with noncollinear magnetizations. Based on a spin-resolved quantum master equation, auto- and cross-correlations of spin-resolved currents are analyzed to reveal the underlying spin transport dynamics and characteristics for various polarizations. We find the currents of majority and minority spins could be strongly autocorrelated despite uncorrelated charge transfer. The inte…

Routing entanglement through quantum networks
Karl Pelka, Matteo Aquilina, Andr\'e Xuereb
https://arxiv.org/abs/2402.08102 https://

Routing entanglement through quantum networks
Entanglement, one of the clearest manifestations of non-classical physics, holds significant promise for technological applications such as more secure communications and faster computations. In this paper we explore the use of non-reciprocal transport in a network of continuous-variable systems to route entanglement in one direction through the network. We develop the theory and discuss a potential realization of controllable flow of entanglement in quantum systems; our method employs only Gau…

Hyperballistic transport in dense ionized matter under external AC electric fields
Daniele Gamba, Bingyu Cui, Alessio Zaccone
https://arxiv.org/abs/2402.08519

Hyperballistic transport in dense ionized matter under external AC electric fields
The Langevin equation is ubiquitously employed to numerically simulate plasmas and dusty plasmas. However, the usual assumption of white noise becomes untenable when the system is subject to an external AC electric field. This is because the charged particles in the plasma, which provide the thermal bath for the particle transport, become themselves responsive to the AC field and the thermal noise is field-dependent and non-Markovian. We theoretically study the particle diffusivity in a Langevi…

This https://arxiv.org/abs/2403.02735 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csDC_…

Distributed OpenMP Offloading of OpenMC on Intel GPU MAX Accelerators
Monte Carlo (MC) simulations play a pivotal role in diverse scientific and engineering domains, with applications ranging from nuclear physics to materials science. Harnessing the computational power of high-performance computing (HPC) systems, especially Graphics Processing Units (GPUs), has become essential for accelerating MC simulations. This paper focuses on the adaptation and optimization of the OpenMC neutron and photon transport Monte Carlo code for Intel GPUs, specifically the Intel Da…

This https://arxiv.org/abs/2312.05377 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

Holographic transport beyond the supergravity approximation
We set up a unified framework to efficiently compute the shear and bulk viscosities of strongly coupled gauge theories with gravitational holographic duals involving higher derivative corrections. We consider both Weyl$^4$ corrections, encoding the finite 't Hooft coupling corrections of the boundary theory, and Riemann$^2$ corrections, responsible for non-equal central charges $c\ne a$ of the theory at the ultraviolet fixed point. Our expressions for the viscosities in higher derivative hologr…

This https://arxiv.org/abs/2310.09254 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_sta…

Entropic (Gromov) Wasserstein Flow Matching with GENOT
Optimal transport (OT) theory has reshaped the field of generative modeling: Combined with neural networks, recent \textit{Neural OT} (N-OT) solvers use OT as an inductive bias, to focus on ``thrifty'' mappings that minimize average displacement costs. This core principle has fueled the successful application of N-OT solvers to high-stakes scientific challenges, notably single-cell genomics. N-OT solvers are, however, increasingly confronted with practical challenges: while most N-OT solvers ca…

A polynomial chaos approach for uncertainty quantification of Monte Carlo transport codes
Gianluca Geraci, Kayla Clements, Aaron J Olson
https://arxiv.org/abs/2403.07024

A polynomial chaos approach for uncertainty quantification of Monte Carlo transport codes
In this contribution, we discuss the construction of Polynomial Chaos surrogates for Monte Carlo radiation transport applications via non-intrusive spectral projection. This contribution focuses on improvements with respect to the approach that we previously introduced in previous work. We focus on understanding the impact of re-sampling cost on the algorithm performance and provide algorithm refinements, which allow to obtain unbiased estimators for the variance, estimate the PC variability du…

Predicting the Slowing of Stellar Differential Rotation by Instability-Driven Turbulence
B. Tripathi, A. J. Barker, A. E. Fraser, P. W. Terry, E. G. Zweibel
https://arxiv.org/abs/2403.07395

Predicting the Slowing of Stellar Differential Rotation by Instability-Driven Turbulence
Differentially rotating stars and planets transport angular momentum internally due to turbulence at rates that have long been a challenge to predict reliably. We develop a self-consistent saturation theory, using a statistical closure approximation, for hydrodynamic turbulence driven by the axisymmetric Goldreich--Schubert--Fricke (GSF) instability at the stellar equator with radial differential rotation. This instability arises when fast thermal diffusion eliminates the stabilizing effects of…

This https://arxiv.org/abs/2107.11376 has been replaced.
link: https://scholar.google.com/scholar?q=a

Effects of the growth kinetics on solute diffusion in porous films
For the development of porous materials with improved transport properties, a key missing ingredient is to determine the relations between growth kinetics, structure, and transport parameters. Here, we address these relations by studying solute diffusion through three-dimensional porous films produced by simple deposition models with controlled thickness and porosity. We simulate growing films with competitive aggregation rules that incorporate lateral aggregation (relative rate proportional to…

Cosmic Ray Feedback on Bi-stable ISM Turbulence
Roark Habegger, Ka Wai Ho, Ka Ho Yuen, Ellen G. Zweibel
https://arxiv.org/abs/2403.07976 https://

Cosmic Ray Feedback on Bi-stable ISM Turbulence
Despite being energetically important, the effect of cosmic rays on the dynamics of the interstellar medium (ISM) is assumed to be negligible because the cosmic ray energy diffusion coefficient parallel to the magnetic field is relatively large. Using numerical simulations, we explore how variation of the cosmic ray diffusion coefficient as a function of gas temperature could impact the dynamics of the ISM. We create a two-zone model of cosmic ray transport, reflecting the strong damping of the…

This https://arxiv.org/abs/2305.03687 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hepp…

Multi-charmed and singled charmed hadrons from coalescence: yields and ratios in different collision systems at LHC
We study the production of charmed and multi-charmed hadrons in ultra-relativistic Heavy Ion Collisions coupling the transport approach for charm dynamics in the medium to an hybrid hadronization model of coalescence plus fragmentation. In this paper, we mainly discuss the particle yields for single charmed and multi-charmed baryons focusing mainly on the production of $Ξ_{cc}$ and $Ω_{ccc}$. We provide first predictions for PbPb collision in 0-10% centrality class and then we explore the sys…

Will they upgrade to ZIP drives?
https://it.slashdot.org/story/24/04/09/0751247/san-franciscos-light-rail-to-upgrade-from-floppy-disks

Average dissipation for stochastic transport equations with L\'evy noise
Franco Flandoli, Andrea Papini, Marco Rehmeier
https://arxiv.org/abs/2402.08461

Average dissipation for stochastic transport equations with Lévy noise
We show that, in one spatial and arbitrary jump dimension, the averaged solution of a Marcustype SPDE with pure jump Lévy transport noise satisfies a dissipative deterministic equation involving a fractional Laplace-type operator. To this end, we identify the correct associated Lévy measure for the driving noise. We consider this a first step in the direction of a non-local version of enhanced dissipation, a phenomenon recently proven to occur for Brownian transport noise and the associated l…

Apparently today is International Professional Drivers Day.
Hug your public transport bus driver.
(but maybe wait until the vehicle stops)

It is very hard for me to muster the motivation to work in this system sometimes https://www.theguardian.com/business/2024/feb/29/biden-spending-highways-public-transport-climate-crisis

Local and global blow-downs of transport twistor space
Jan Bohr, Fran\c{c}ois Monard, Gabriel P. Paternain
https://arxiv.org/abs/2403.05985 https://…

Local and global blow-downs of transport twistor space
Transport twistor spaces are degenerate complex $2$-dimensional manifolds $Z$ that complexify transport problems on Riemannian surfaces, appearing e.g.~in geometric inverse problems. This article considers maps $β\colon Z\to \mathbb{C}^2$ with a holomorphic blow-down structure that resolve the degeneracy of the complex structure and allow to gain insight into the complex geometry of $Z$. The main theorems provide global $β$-maps for constant curvature metrics and their perturbations and local…

EVs ❤️ grids, grids ❤️ EVs
They have been keeping an eye on each other for some time. Sometimes grids have tried to force EVs - that's not a recipe for romance. At other times, EVs have neglected the needs of the grid.
Smart and bi-directional charging is the enabler for a long-term, trusting and mutually beneficial relationship.
Our recent paper on bi-directional charging sets out principles for a bright future together.

Enabling two-way communication: Principles for bidirectional charging of electric vehicles 
EVs can do more than simply transport people or goods from place to place. Through smart charging and bidirectional charging, their batteries can become an important societal resource. 

Generalised Taylor dispersion of chiral microswimmers
Keito Ogawa, Kenta Ishimoto
https://arxiv.org/abs/2403.08201 https://arxiv.org/…

Generalised Taylor dispersion of chiral microswimmers
Transport phenomena of microswimmers in fluid flows play a crucial role in various biological processes, including bioconvection and cell sorting. In this paper, we investigate the dispersion behavior of chiral microswimmers in a simple shear flow utilizing the generalized Taylor dispersion (GTD) theory, motivated by biased locomotion of bacterial swimmers known as bacterial rheotaxis. We thus focus on the influence of shear-induced torque effects due to particle chirality, employing an extende…

This https://arxiv.org/abs/2301.05081 has been replaced.
initial toot: https://mastoxiv.page/@a…

Magnetic-field-free nonreciprocal transport in graphene multi-terminal Josephson junctions
Nonreciprocal superconducting devices have attracted growing interest in recent years as they potentially enable directional charge transport for applications in superconducting quantum circuits. Specifically, the superconducting diode effect has been explored in two-terminal devices that exhibit superconducting transport in one current direction while showing dissipative transport in the opposite direction. Here, we exploit multi-terminal Josephson junctions (MTJJs) to engineer magnetic-field-…

london_transport: London Transport Network
Multiplex network with 3 edge types representing links within the three layers of London train stations: Underground, Overground and DLR.
This network has 369 nodes and 441 edges.
Tags: Transportation, Public Transport, Multilayer, Weighted
https://net…

This https://arxiv.org/abs/2402.07839 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csCV_…

Towards Meta-Pruning via Optimal Transport
Structural pruning of neural networks conventionally relies on identifying and discarding less important neurons, a practice often resulting in significant accuracy loss that necessitates subsequent fine-tuning efforts. This paper introduces a novel approach named Intra-Fusion, challenging this prevailing pruning paradigm. Unlike existing methods that focus on designing meaningful neuron importance metrics, Intra-Fusion redefines the overlying pruning procedure. Through utilizing the concepts o…

Regional Adaptive Metropolis Light Transport
Hisanari Otsu, Killian Herveau, Johannes Hanika, Derek Nowrouzezahrai, Carsten Dachsbacher
https://arxiv.org/abs/2402.08273

Regional Adaptive Metropolis Light Transport
The design of the proposal distributions, and most notably the kernel parameters, are crucial for the performance of Markov chain Monte Carlo (MCMC) rendering. A poor selection of parameters can increase the correlation of the Markov chain and result in bad rendering performance. We approach this problem by a novel path perturbation strategy for online-learning of state-dependent kernel parameters. We base our approach on the theoretical framework of regional adaptive MCMC which enables the ada…

Monge Amp\`ere gravity: from the large deviation principle to cosmological simulations through optimal transport
Bruno L\'evy, Yann Brenier, Roya Mohayaee
https://arxiv.org/abs/2404.07697

Monge Ampère gravity: from the large deviation principle to cosmological simulations through optimal transport
We study Monge-Ampère gravity (MAG) as an effective theory of cosmological structure formation through optimal transport theory. MAG is based on the Monge-Ampère equation, a nonlinear version of the Poisson equation, that relates the Hessian determinant of the potential to the density field. We explain how MAG emerges from a conditioned system of independent and indistinguishable Brownian particles, through the large deviation principle, in the continuum limit. To numerically explore this hig…

https://youtube.com/watch?v=4U3MDy8FF8E
Really nice interview between two nerds, discussing transport and more. One of them is a former presidential candidate and current Secretary of Transport.

This https://arxiv.org/abs/2401.13253 has been replaced.
initial toot: https://mastoxiv.page/@arXi…

Transport Dynamics of Water Molecules Confined between Lipid Membranes
Water molecules confined between biological membranes exhibit a distinctive non-Gaussian displacement distribution, far different from bulk water. Here, we introduce a new transport equation for water molecules in the intermembrane space, quantitatively explaining molecular dynamics simulation results. We find the unique transport dynamics of water molecules stems from the lateral diffusion coefficient fluctuation caused by their longitudinal motion. We also identify an interfacial region where…

Substitutability, equilibrium transport, and matching models
Alfred Galichon, Antoine Jacquet
https://arxiv.org/abs/2405.07628 https://

London Transport Museum launches “Echoes of the Blitz: Underground shelters in Ukraine and London” exhibition: https://benborges.xyz/2024/03/06/london-transport-museum.html

Session Types for the Transport Layer: Towards an Implementation of TCP
Samuel Cavoj (University of Glasgow), Ivan Nikitin (University of Glasgow), Colin Perkins (University of Glasgow), Ornela Dardha (University of Glasgow)
https://arxiv.org/abs/2404.05478

Session Types for the Transport Layer: Towards an Implementation of TCP
Session types are a typing discipline used to formally describe communication-driven applications with the aim of fewer errors and easier debugging later into the life cycle of the software. Protocols at the transport layer such as TCP, UDP, and QUIC underpin most of the communication on the modern Internet and affect billions of end-users. The transport layer has different requirements and constraints compared to the application layer resulting in different requirements for verification. Despi…

Kingston's Efficient Homes and Low Carbon Transport Show is all about creating more comfortable, energy efficient homes, and greener travel!
https://www.earth.org.uk/Kingston-Efficient-Homes-Show-2024.html

Kingstons Efficient Homes and Low Carbon Transport Show (2024)
Making our homes greener and boosting Kingstons green businesses!

Schienenverkehr im Landkreis Wittenberg: Gespräche zu möglicher Zukunft der Heidebahn laufen weiter
Förderverein Berlin-Anhaltische Eisenbahn reagiert auf Pläne, Kies per Zug zu transportieren.
https://www.mz.de/lokal/wittenberg/gesprac

Schienenverkehr im Landkreis Wittenberg: Gespräche zu möglicher Zukunft der Heidebahn laufen weiter
Wittenberg/MZ/mac. - Die Pläne der Reaktivierung von Teilen der Strecke der einstigen Heidebahn zum Transport von Kies (die MZ berichtete) stößt auf großes Interesse. Zu Wort gemeldet hat sich neben anderen auch Michael Jungfer, der Vorsitzende des Fördervereins Berlin-Anhaltische...

People who intentionally leave their trash on public transport: #IceMoonPrison

Hyperballistic transport in dense ionized matter under external AC electric fields
Daniele Gamba, Bingyu Cui, Alessio Zaccone
https://arxiv.org/abs/2402.08519

Hyperballistic transport in dense ionized matter under external AC electric fields
The Langevin equation is ubiquitously employed to numerically simulate plasmas and dusty plasmas. However, the usual assumption of white noise becomes untenable when the system is subject to an external AC electric field. This is because the charged particles in the plasma, which provide the thermal bath for the particle transport, become themselves responsive to the AC field and the thermal noise is field-dependent and non-Markovian. We theoretically study the particle diffusivity in a Langevi…

This https://arxiv.org/abs/2312.00666 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qu…

Rectified Lorentz Force from Thermal Current Fluctuations
In a conducting medium held at finite temperature, free carriers are performing Brownian motion and generate fluctuating electromagnetic fields. We compute the averaged Lorentz force density that turns out nonzero in a thin sub-surface layer, pointing towards the surface, while vanishing in the bulk. This is an elementary example of rectified fluctuations, similar to the Casimir force or radiative heat transport. Our results also provide an experimental way to distinguish between the Drude and …

Nach dem Anschlag auf die Stromversorgung der Tesla-Autofabrik in Grünheide bei Berlin fordert die deutsche Wirtschaft mehr Sicherheit für kritische Infrastrukturen wie Energie- und Wasserversorgung, Transport, Verkehr sowie Informationstechnik und Telekommunikation.
Zum Artikel: https://heise.de/-9648194

This https://arxiv.org/abs/2307.14590 has been replaced.
initial toot: https://mastoxiv.page/@…

Nonequilibrium Transport in a Superfluid Josephson Junction Chain: Is There Negative Differential Conductivity?
We consider the far-from-equilibrium quantum transport dynamics in a 1D Josephson junction chain of multi-mode Bose-Einstein condensates. We develop a theoretical model to examine the experiment of R. Labouvie et al. [Phys. Rev. Lett. 115, 050601 (2015)], wherein the phenomenon of negative differential conductivity (NDC) was reported in the refilling dynamics of an initially depleted site within the chain. We demonstrate that a unitary c-field description can quantitatively reproduce the experi…

Il doit y avoir une autre solution que supprimer le transport public chaque samedi soir qu'il y a un match de foot.

Nonequilibrium transport and the fluctuation theorem in the thermodynamic behaviors of nonlinear photonic systems
Yang Liu, Jincheng Lu, Zhongfei Xiong, Fan O. Wu, Demetrios Christodoulides, Yuntian Chen, Jian-Hua Jiang
https://arxiv.org/abs/2405.06173

This https://arxiv.org/abs/2310.05461 has been replaced.
link: https://scholar.google.com/scholar?q=a

Sparsistency for Inverse Optimal Transport
Optimal Transport is a useful metric to compare probability distributions and to compute a pairing given a ground cost. Its entropic regularization variant (eOT) is crucial to have fast algorithms and reflect fuzzy/noisy matchings. This work focuses on Inverse Optimal Transport (iOT), the problem of inferring the ground cost from samples drawn from a coupling that solves an eOT problem. It is a relevant problem that can be used to infer unobserved/missing links, and to obtain meaningful informa…

Radiation transport methods in star formation simulations
Richard W\"unsch
https://arxiv.org/abs/2403.05410 https://arxiv.org/pd…

Radiation transport methods in star formation simulations
Radiation transport plays a crucial role in star formation models, as certain questions within this field cannot be accurately addressed without taking it into account. Given the high complexity of the interstellar medium from which stars form, numerical simulations are frequently employed to model the star formation process. This study reviews recent methods for incorporating radiation transport into star formation simulations, discussing them in terms of the used algorithms, treatment of radi…

This https://arxiv.org/abs/2403.05673 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Analysis of Hybrid MC/Deterministic Methods for Transport Problems Based on Low-Order Equations Discretized by Finite Volume Schemes
This paper presents hybrid numerical techniques for solving the Boltzmann transport equation formulated by means of low-order equations for angular moments of the angular flux. The moment equations are derived by the projection operator approach. The projected equations are closed exactly using a high-order transport solution. The low-order equations of the hybrid methods are approximated with a finite volume scheme of the second-order accuracy. Functionals defining the closures in the discreti…

On the nonconvexity of some push-forward constraints and its consequences in machine learning
Lucas de Lara (UT3, IMT), Mathis Deronzier (UT3, IMT), Alberto Gonz\'alez-Sanz (UT3, IMT), Virgile Foy (UT3, IMT)
https://arxiv.org/abs/2403.07471

On the nonconvexity of some push-forward constraints and its consequences in machine learning
The push-forward operation enables one to redistribute a probability measure through a deterministic map. It plays a key role in statistics and optimization: many learning problems (notably from optimal transport, generative modeling, and algorithmic fairness) include constraints or penalties framed as push-forward conditions on the model. However, the literature lacks general theoretical insights on the (non)convexity of such constraints and its consequences on the associated learning problems…

"Ocean waves propel PFAS back to land, new study finds"
#Oceans #PFAS #ForeverChemicals

Ocean waves propel PFAS back to land, new study finds
A new study by researchers at the Department of Environmental Science, Stockholm University, published in Science Advances, reveals that PFAS re-emit into the air from crashing ocean waves at levels comparable to or greater than other sources, establishing a cyclical transport process for these "forever chemicals" between land and sea.

Optimal transport of measures via autonomous vector fields
Nicola De Nitti, Xavier Fern\'andez-Real
https://arxiv.org/abs/2405.06503 https://

Predicting the Slowing of Stellar Differential Rotation by Instability-Driven Turbulence
B. Tripathi, A. J. Barker, A. E. Fraser, P. W. Terry, E. G. Zweibel
https://arxiv.org/abs/2403.07395

Predicting the Slowing of Stellar Differential Rotation by Instability-Driven Turbulence
Differentially rotating stars and planets transport angular momentum internally due to turbulence at rates that have long been a challenge to predict reliably. We develop a self-consistent saturation theory, using a statistical closure approximation, for hydrodynamic turbulence driven by the axisymmetric Goldreich--Schubert--Fricke (GSF) instability at the stellar equator with radial differential rotation. This instability arises when fast thermal diffusion eliminates the stabilizing effects of…

Cosmic Ray Feedback on Bi-stable ISM Turbulence
Roark Habegger, Ka Wai Ho, Ka Ho Yuen, Ellen G. Zweibel
https://arxiv.org/abs/2403.07976 https://

Cosmic Ray Feedback on Bi-stable ISM Turbulence
Despite being energetically important, the effect of cosmic rays on the dynamics of the interstellar medium (ISM) is assumed to be negligible because the cosmic ray energy diffusion coefficient parallel to the magnetic field is relatively large. Using numerical simulations, we explore how variation of the cosmic ray diffusion coefficient as a function of gas temperature could impact the dynamics of the ISM. We create a two-zone model of cosmic ray transport, reflecting the strong damping of the…

This https://arxiv.org/abs/2308.08257 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hepp…

Chiral kinetic theory with self-energy corrections and neutrino spin Hall effect
We systematically derive the chiral kinetic theory for chiral fermions with collisions, including the self-energy corrections, from quantum field theories. We find that the Wigner functions and chiral kinetic equations receive both the classical and quantum corrections from the self-energies and their spacetime gradients. We also apply this formalism to study nonequilibrium neutrino transport due to the interaction with thermalized electrons and nucleons, as realized in core-collapse supernovae…

Discovery of a Magnetic Topological Semimetal Eu3In2As4 with a Single Pair of Weyl Points
Ke Jia, Jingyu Yao, Xiaobo He, Yupeng Li, Junze Deng, Ming Yang, Junfeng Wang, Zengwei Zhu, Cuixiang Wang, Dayu Yan, Hai L. Feng, Jie Shen, Yongkang Luo, Zhijun Wang, Youguo Shi
https://arxiv.org/abs/2403.07637

Discovery of a Magnetic Topological Semimetal Eu3In2As4 with a Single Pair of Weyl Points
Magnetic Weyl semimetal (MWS) is a unique topological state with open surface Fermi arc states and other exotic transport phenomena. However, most reported MWSs show multiple pairs of Weyl points and complicated Fermi surfaces, which increases the difficulty of the investigation into the intrinsic chiral transport property. In this wor, we successfully synthesized a soft magnetic Weyl semimetal Eu3In2As4 with a single pair of Weyl points under magnetic fields. The Shubnikov de Haas (SdH) oscill…

Generalised Taylor dispersion of chiral microswimmers
Keito Ogawa, Kenta Ishimoto
https://arxiv.org/abs/2403.08201 https://arxiv.org/…

Generalised Taylor dispersion of chiral microswimmers
Transport phenomena of microswimmers in fluid flows play a crucial role in various biological processes, including bioconvection and cell sorting. In this paper, we investigate the dispersion behavior of chiral microswimmers in a simple shear flow utilizing the generalized Taylor dispersion (GTD) theory, motivated by biased locomotion of bacterial swimmers known as bacterial rheotaxis. We thus focus on the influence of shear-induced torque effects due to particle chirality, employing an extende…

This https://arxiv.org/abs/2401.13253 has been replaced.
initial toot: https://mastoxiv.page/@arXi…

Transport Dynamics of Water Molecules Confined between Lipid Membranes
Water molecules confined between biological membranes exhibit a distinctive non-Gaussian displacement distribution, far different from bulk water. Here, we introduce a new transport equation for water molecules in the intermembrane space, quantitatively explaining molecular dynamics simulation results. We find the unique transport dynamics of water molecules stems from the lateral diffusion coefficient fluctuation caused by their longitudinal motion. We also identify an interfacial region where…

This https://arxiv.org/abs/2403.05673 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Analysis of Hybrid MC/Deterministic Methods for Transport Problems Based on Low-Order Equations Discretized by Finite Volume Schemes
This paper presents hybrid numerical techniques for solving the Boltzmann transport equation formulated by means of low-order equations for angular moments of the angular flux. The moment equations are derived by the projection operator approach. The projected equations are closed exactly using a high-order transport solution. The low-order equations of the hybrid methods are approximated with a finite volume scheme of the second-order accuracy. Functionals defining the closures in the discreti…

Fascinating political blackmail in Germany: transport minister threatens total ban on weekend driving. A Solomon-like threat, of course, because what do German politicians (of all stripes) love more than their own children? Nobody wants a driving ban on their conscience.
https://www.

Wissing droht im Streit um Klimaziele mit Wochenend-Fahrverboten
Klimaschutz auf der Straße - um das zu erreichen, droht Volker Wissing sogar mit einem Fahrverbot am Wochenende. Für die Umweltschützer von Greenpeace ein Manöver des Verkehrsministers, um vom eigenen Versagen abzulenken.

This https://arxiv.org/abs/2312.15331 has been replaced.
initial toot: https://mastoxiv.page/@a…

Thermal transport in thermoelectric materials of SnSSe and SnS$_2$: a non-equilibrium Monte-Carlo simulation of Boltzmann transport equation
In the present work, thermal transport and energy conversation in two thermoelectrically efficient candidates of Janus SnSSe and SnS$_2$ are investigated within the non-equilibrium Monte Carlo simulation of phonon Boltzmann equation. The phonon analysis is performed to determine the contributed phonons in heat transport. The results present that the dominant participating phonons are longitudinal acoustic ones while the least belongs to the transverse acoustic (TA) mode. Both materials reached …

This https://arxiv.org/abs/2308.07682 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

60 years of cyclic monotonicity: a survey
The primary purpose of this note is to provide an instructional summary of the state of the art regarding cyclic monotonicity and related notions. We will also present how these notions are tied to optimality in the optimal transport (or Monge-Kantorovich) problem.

Discovery of a Magnetic Topological Semimetal Eu3In2As4 with a Single Pair of Weyl Points
Ke Jia, Jingyu Yao, Xiaobo He, Yupeng Li, Junze Deng, Ming Yang, Junfeng Wang, Zengwei Zhu, Cuixiang Wang, Dayu Yan, Hai L. Feng, Jie Shen, Yongkang Luo, Zhijun Wang, Youguo Shi
https://arxiv.org/abs/2403.07637

Discovery of a Magnetic Topological Semimetal Eu3In2As4 with a Single Pair of Weyl Points
Magnetic Weyl semimetal (MWS) is a unique topological state with open surface Fermi arc states and other exotic transport phenomena. However, most reported MWSs show multiple pairs of Weyl points and complicated Fermi surfaces, which increases the difficulty of the investigation into the intrinsic chiral transport property. In this wor, we successfully synthesized a soft magnetic Weyl semimetal Eu3In2As4 with a single pair of Weyl points under magnetic fields. The Shubnikov de Haas (SdH) oscill…

This https://arxiv.org/abs/2307.15542 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

The dynamical second-order transport coefficients of smeared Dp-brane
The smeared Dp-brane is constructed by having the black Dp-brane uniformly smeared over several transverse directions. After integrating the spherical directions and the smeared directions, the smeared Dp-brane turns out to be a Chamblin-Reall model with one background scalar field. Within the framework of the fluid/gravity correspondence, we not only prove the equivalence between the smeared Dp-brane and the compactified Dp-brane by explicitly calculating the 7 dynamical second-order transport…

This https://arxiv.org/abs/2212.13752 has been replaced.
link: https://scholar.google.com/scholar?q=a

Thermography of the superfluid transition in a strongly interacting Fermi gas
Heat transport is a fundamental property of all physical systems and can serve as a fingerprint identifying different states of matter. In a normal liquid a hot spot diffuses while in a superfluid heat propagates as a wave called second sound. Despite its importance for understanding quantum materials, direct imaging of heat transport is challenging, and one usually resorts to detecting secondary effects, such as changes in density or pressure. Here we establish thermography of a strongly inter…

Tutorials on Monte-Carlo modeling of photon transport in biological tissues
Maryam Ghahremani
https://arxiv.org/abs/2405.06810 https://

Optical and Transport Properties of Plasma Mixtures from Ab Initio Molecular Dynamics
Alexander J. White, Galen T. Craven, Vidushi Sharma, Lee A. Collins
https://arxiv.org/abs/2404.07800

Optical and Transport Properties of Plasma Mixtures from Ab Initio Molecular Dynamics
Predicting the charged particle transport properties of warm dense matter / hot dense plasma mixtures is a challenge for analytical models. High accuracy ab initio methods are more computationally expensive, but can provide critical insight by explicitly simulating mixtures. In this work, we investigate the transport properties and optical response of warm dense carbon-hydrogen mixtures at varying concentrations under either conserved electronic pressure or mass density at a constant temperatur…

This https://arxiv.org/abs/2305.09792 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Score Operator Newton transport
We propose a new approach for sampling and Bayesian computation that uses the score of the target distribution to construct a transport from a given reference distribution to the target. Our approach is an infinite-dimensional Newton method, involving a linear PDE, for finding a zero of a ``score-residual'' operator. We prove sufficient conditions for convergence to a valid transport map. Our Newton iterates can be computed by exploiting fast solvers for elliptic PDEs, resulting in new algorith…

The chimera revisited: Wall- and magnetically-bounded turbulent flows
Nils T. Basse
https://arxiv.org/abs/2402.07918 https://arxiv.or…

The chimera revisited: Wall- and magnetically-bounded turbulent flows
This paper is a first attempt at bringing together various concepts from research on wall- and magnetically-bounded turbulent flows. Brief reviews of both fields are provided: The main similarities identified are coherent (turbulent) structures, flow generation and transport barriers. Examples are provided and discussed.

Polish FM: Transport of shells under Czech initiative 'already being organized': https://benborges.xyz/2024/03/29/polish-fm-transport.html

Exploring Topological Transport in Pt$_2$HgSe$_3$ Nanoribbons: Insights for Spintronic Device Integration
Rafael L. H. Freire, F. Crasto de Lima, Roberto H. Miwa, A. Fazzio
https://arxiv.org/abs/2405.06861

This https://arxiv.org/abs/2212.13752 has been replaced.
link: https://scholar.google.com/scholar?q=a

Thermography of the superfluid transition in a strongly interacting Fermi gas
Heat transport is a fundamental property of all physical systems and can serve as a fingerprint identifying different states of matter. In a normal liquid a hot spot diffuses while in a superfluid heat propagates as a wave called second sound. Despite its importance for understanding quantum materials, direct imaging of heat transport is challenging, and one usually resorts to detecting secondary effects, such as changes in density or pressure. Here we establish thermography of a strongly inter…

A Copula Graphical Model for Multi-Attribute Data using Optimal Transport
Qi Zhang, Bing Li, Lingzhou Xue
https://arxiv.org/abs/2404.06735 https://<…

A Copula Graphical Model for Multi-Attribute Data using Optimal Transport
Motivated by modern data forms such as images and multi-view data, the multi-attribute graphical model aims to explore the conditional independence structure among vectors. Under the Gaussian assumption, the conditional independence between vectors is characterized by blockwise zeros in the precision matrix. To relax the restrictive Gaussian assumption, in this paper, we introduce a novel semiparametric multi-attribute graphical model based on a new copula named Cyclically Monotone Copula. This…

A Sinkhorn-type Algorithm for Constrained Optimal Transport
Xun Tang, Holakou Rahmanian, Michael Shavlovsky, Kiran Koshy Thekumparampil, Tesi Xiao, Lexing Ying
https://arxiv.org/abs/2403.05054

A Sinkhorn-type Algorithm for Constrained Optimal Transport
Entropic optimal transport (OT) and the Sinkhorn algorithm have made it practical for machine learning practitioners to perform the fundamental task of calculating transport distance between statistical distributions. In this work, we focus on a general class of OT problems under a combination of equality and inequality constraints. We derive the corresponding entropy regularization formulation and introduce a Sinkhorn-type algorithm for such constrained OT problems supported by theoretical gua…

Enhancing atomic ordering, magnetic and transport properties of Mn2VGa Heusler alloy thin films toward negatively spin-polarized charge injection
Z. H. Li, H. Suto, V. Barwal, K. Masuda, T. T. Sasaki, Z. X. Chen, H. Tajiri, L. S. R. Kumara, T. Koganezawa, K. Amemiya, S. Kokado, K. Hono, Y. Sakuraba
https://arxiv.org/abs/2405.063…

Atomic-scale tunable phonon transport at tailored grain boundaries
Xiaowang Wang, Chaitanya A. Gadre, Runqing Yang, Wanjuan Zou, Xing Bin, Christopher Addiego, Toshihiro Aoki, Yujie Quan, Wei-Tao Peng, Yifeng Huang, Chaojie Du, Mingjie Xu, Xingxu Yan, Ruqian Wu, Shyue Ping Ong, Bolin Liao, Penghui Cao, Xiaoqing Pan
https://arxiv…

EU Commission proposes changes to transport deal with Ukraine based on 'lessons learned': https://benborges.xyz/2024/03/05/eu-commission-proposes.html

“Public subsidies for clean energy technologies are usually offered to make them cost competitive with fossil fuel technologies,” @… tells *Hydrogen Insight*.
“The suggestion that public subsidies should be offered to create cost parity between hydrogen vehicles and electric vehicles is misguided and would be a misallocation of scarce public funds bett…

EU body calls for more subsidies for hydrogen vehicles to help them compete against battery EVs
European Commission's Joint Research Centre says 'long-term financial mechanisms' would help offset FCEVs' higher running costs

This https://arxiv.org/abs/2404.03603 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Analysis of second-order temporal schemes for modeling flow-solute transport in unsaturated porous media
In this study, second-order temporal discretizations are analyzed for solving the coupled system of infiltration and solute transport in unsaturated porous media. The Richards equation is used to describe unsaturated flow, while the advection-dispersion equation (ADE) is used for modeling solute transport. The standard finite element discretization in space is utilized and four time-stepping methods are studied. Three of these methods require an iterative resolution to solve the Richards equati…

This https://arxiv.org/abs/2312.08233 has been replaced.
initial toot: https://mastoxiv.page/@a…

Robust Dipolar Layers between Organic Semiconductors and Silver for Energy-Level Alignment
The interface between a metal electrode and an organic semiconductor (OS) layer has a defining role in the properties of the resulting device. To obtain a desired performance, interlayers are introduced to modify the adhesion and growth of OS and enhance the efficiency of charge transport through the interface. However, the employed interlayers face common challenges, including a lack of electric dipoles to tune the mutual position of energy levels, being too thick for efficient electronic tran…

This https://arxiv.org/abs/2308.10577 has been replaced.
initial toot: https://mastoxiv.page/@ar…

The impact of microscale physics in continuous time random walks for hydrodynamic dispersion in disordered media
The continuous time random walk (CTRW) approach has been widely applied to model large-scale non-Fickian transport in the flow through disordered media. Often, the underlying microscopic transport mechanisms and disorder characteristics are not known, and their effect on large-scale solute dispersion is encoded by a heavy-tailed transition time distribution. Here we study how the microscale physics manifests in the CTRW framework, and how it affects solute dispersion. To this end, we consider t…

This https://arxiv.org/abs/2307.08917 has been replaced.
initial toot: https://mastoxiv.page/@a…

Observation of giant nonreciprocal charge transport from quantum Hall states in topological insulator
Symmetry breaking in quantum materials is of great importance and leads to novel nonreciprocal charge transport. The topological insulator system provides a unique platform to study nonreciprocal charge transport due to the exotic surface states, especially the quantum Hall states under external magnetic field. Here, we report the observation of novel nonreciprocal charge transport mediated by the quantum Hall state in intrinsic topological insulator Sn-Bi1.1Sb0.9Te2S devices, which is attribut…

Quadratically Regularized Optimal Transport: Existence and Multiplicity of Potentials
Marcel Nutz
https://arxiv.org/abs/2404.06847 https://

Quadratically Regularized Optimal Transport: Existence and Multiplicity of Potentials
The optimal transport problem with quadratic regularization is useful when sparse couplings are desired. The density of the optimal coupling is described by two functions called potentials; equivalently, potentials can be defined as a solution of the dual problem. We prove the existence of potentials for a general square-integrable cost. Potentials are not necessarily unique, a phenomenon directly related to sparsity of the optimal support. For discrete problems, we describe the family of all p…

This https://arxiv.org/abs/2403.05487 has been replaced.
initial toot: https://mastoxiv.page/@a…

Nonlinear Hall effect from long-lived valley-polarizing relaxons
The nonlinear Hall effect has attracted much attention due to the famous, widely adopted interpretation in terms of the Berry curvature dipole in momentum space. Using \textit{ab initio} Boltzmann transport equations, we find a 60\% enhancement in the nonlinear Hall effect of $n$-doped GeTe and its noticeable frequency dependence, qualitatively different from the predictions based on the Berry curvature dipole. The origin of these differences is long-lived valley polarization in the electron di…

Respective Roles of Electron-Phonon and Electron-Electron Interactions in the Transport and Quasiparticle Properties of SrVO$_3$
David J. Abramovitch, Jernej Mravlje, Jin-Jian Zhou, Antoine Georges, Marco Bernardi
https://arxiv.org/abs/2404.07772

Respective Roles of Electron-Phonon and Electron-Electron Interactions in the Transport and Quasiparticle Properties of SrVO$_3$
The spectral and transport properties of strongly correlated metals, such as SrVO$_3$ (SVO), are widely attributed to electron-electron ($e$-$e$) interactions, with lattice vibrations (phonons) playing a secondary role. Here, using first-principles electron-phonon ($e$-ph) and dynamical mean field theory calculations, we show that $e$-ph interactions play an essential role in SVO: they govern the electron scattering and resistivity in a wide temperature range down to 30 K, and induce an experim…

Sub-100-fs formation of dark excitons in monolayer WS$_2$
Pavel V. Kolesnichenko, Lukas Wittenbecher, Qianhui Zhang, Run Yan Teh, Chandni Babu, Michael S. Fuhrer, Anders Mikkelsen, Donatas Zigmantas
https://arxiv.org/abs/2403.08390

Sub-100-fs formation of dark excitons in monolayer WS$_2$
Two-dimensional semiconductors based on transition metal dichalcogenides are promising for electronics and optoelectronics applications owing to their properties governed by strongly-bound bright and dark excitons. Momentum-forbidden dark excitons have recently received attention as better alternatives to bright excitons for long-range transport. However, accessing the dynamics of dark excitons is challenging experimentally. The most direct, but very complicated, experiment is transient angle-r…

Heat transport in the quantum Rabi model: Universality and ultrastrong coupling effects
L. Magazz\`u, E. Paladino, M. Grifoni
https://arxiv.org/abs/2403.06909

Heat transport in the quantum Rabi model: Universality and ultrastrong coupling effects
Heat transport in the quantum Rabi model at weak interaction with the heat baths is controlled by the qubit-oscillator coupling. Universality of the linear conductance versus the temperature is found for $T\lesssim T_K$, with $T_K$ a coupling-dependent Kondo-like temperature. At low temperature, coherent heat transfer via virtual processes yields a $\sim T^3$ behavior with destructive interference in the presence of quasi-degeneracies in the spectrum. As the temperature increases, incoherent em…