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A Biconvex Formulation for Stable Transport of Mixture Models with a Unique Solution
arXiv:2606.02515v1 Announce Type: new Abstract: Optimal transport (OT) provides a principled framework for mapping between probability distributions. Despite extensive progress, applying OT to large-scale data remains computationally demanding, and the resulting pointwise transport plans are often difficult to interpret. We introduce Optimal Mixture Transport (OMT), a scalable framework that shifts the transport paradigm from individual samples to mixtures of subpopulations, reformulating...
Exploring the Boundaries of Differentiable Radiation Transport and Detector Simulation
Announce Type: replace Abstract: We present an application of automatic differentiation for particle transport through matter using a Geant4-like radiation transport simulation with a full electromagnetic physics model. When differentiating this step-based transport, we observe exploding gradients driven by rare but extreme sensitivities at material boundaries, which propagate through subsequent transport and shower development. To obtain usable derivatives for optimization, we introduce a...
Exploring Smart Data opportunities in the transport sector
Exploring Smart Data opportunities in the transport sector Qualitative research results on transport Smart Data use cases in England. Applies to England Documents Details The Department for Business and Trade (DBT) and the Department for Transport (DfT) commissioned Innovate UK Business Connect to identify use cases for a transport Smart Data scheme.
Fuel-saving push, rising costs: Is public transport affordable enough?
As fuel prices remain vulnerable to global events and governments continue urging citizens to use public transport, a practical question arises: how affordable is public transport in India today? While buses, metros and local trains are generally far cheaper than private vehicles, commuters often face additional costs such as last-mile connectivity, multiple transfers and longer travel times. An examination of fares across major Indian cities shows that while public transport remains the...
Learning effective Sargassum transport dynamics from limited drifter observations
arXiv:2605.30603v1 Announce Type: cross Abstract: Floating-material transport is influenced by unresolved processes that are often absent from available circulation products. We develop a data-driven transport-learning framework for learning effective transport corrections from limited Lagrangian observations using physically motivated ocean--atmosphere diagnostics and finite-memory representations motivated in part by inertial-particle memory effects. The diagnostic representation is...
Learning effective Sargassum transport dynamics from limited drifter observations
arXiv:2605.30603v1 Announce Type: new Abstract: Floating-material transport is influenced by unresolved processes that are often absent from available circulation products. We develop a data-driven transport-learning framework for learning effective transport corrections from limited Lagrangian observations using physically motivated ocean--atmosphere diagnostics and finite-memory representations motivated in part by inertial-particle memory effects. The diagnostic representation is analyzed...
MATraM: A Multi-Activity Transport and Mobility Agent-Based Model for Activity Modifications
arXiv:2605.30547v1 Announce Type: new Abstract: This paper introduces the Multi-Activity Transport & Mobility (MATraM) Agent-Based Model (ABM), a novel framework designed to advance activity-based transport modelling by incorporating dynamic activity adaptation. Traditional transport models simulate system performance using varying levels of abstraction, including flow-based, queue-based, and interaction-based mobility representations. While these approaches differ in their treatment of...
Quantum transport in mitochondrial complex I is governed by a conserved structural bottleneck
Electron transport in mitochondrial complex I is mediated by a chain of redox centers, yet how electrons traverse this network beyond the canonical pathway remains unclear. While prior models treat transport as a sequential process, they do not resolve whether alternative pathways contribute to functional electron flow. Here, we formulate electron transport as a continuous-time quantum walk on a structure-derived redox network and systematically map pathway-level electron flux inferred from...
Fuel price cut call: Transporters body urge Centre to cut petrol, diesel prices
The All India Motor & Goods Transport Association (AIMGTA) has urged the Centre to reduce petrol and diesel prices, arguing that a sharp decline in international crude oil prices should be passed on to consumers and the transport sector, reported PTI. In a representation to the government, the association said global crude oil prices have fallen from around $104 per barrel to about $90 per barrel, creating room for a reduction in domestic fuel prices. The transporters' body said elevated...
Beyond Stokes drift -- Lagrangian transport in evolving gravity waves
arXiv:2604.24069v3 Announce Type: replace Abstract: Finite-amplitude gravity waves at the air-water interface induce net fluid and particle transport, known as Stokes drift. While this mechanism is well understood for steady waves, transport under unsteady, evolving conditions remains poorly characterized. Here, we investigate Lagrangian transport in freely decaying waves using high-resolution two-phase simulations and a perturbative analytical model.