2026-10-01

7 arXiv categories· 96 journals· 4909 candidates — 2 worth your time· 45 without an open abstract

Headline

Informal settlement heat exposure, and trajectory-based air traffic control optimization

Today, together

tag shift
no tag ran above its 30-day average
on the same shoulders
no foundation work was cited by four of the day's papers counted over the 44 of this day's 47 named papers whose reference lists we have — standing on the same older work is not the same as being about the same thing
first appearance
Universidade Federal do ABC; École Nationale de l’Aviation Civile none of them on a paper we published in the 111 days before this issue

Two counts, not one counted twice: every row here but “on the same shoulders” counts the papers published above, and that one counts every paper this day named — those and the ones under Also published today, whose abstracts we could not read.

published: GeoJournal

Rohit Juneja, Flávia da Fonseca Feitosa, Víctor Fernandez Nascimento
GeoJournal

Universidade Federal do ABC

Urban Heat Island Mitigation · Urban Green Space and Health · Climate Change and Health Impacts · satellite imagery · São Paulo · Delhi

Uneven heat exposure in Global South megacities: a comparative analysis of informal settlements in São Paulo and Delhi

This study compares surface heat exposure in informal settlements across Sao Paulo and Delhi during peak summer using Landsat 8 Land Surface Temperature (LST) data alongside vegetation, built-up density, and topographic indicators. Informal settlements in both cities are consistently hotter than formal areas, though Sao Paulo's favelas act as localized hotspots with high thermal variability (mean LST of 40.6 C, range of 12.2 C) while Delhi's slums sit within a uniformly overheated landscape (mean LST of 44.8 C, range of 9.3 C). Across both cities, vegetation correlates with lower temperatures and built-up density with higher temperatures, while population density shows no significant relationship.

Why it matters — It demonstrates that the thermal risks of informal settlements are not uniform across the Global South, showing how different regional urban morphologies alter the spatial distribution and intensity of extreme heat exposure.

Caveat: The study relies on satellite-derived land surface temperature rather than air temperature, which may not fully reflect the actual thermal comfort or physiological heat stress experienced by residents on the ground.

GeoJournal · doi

published: Transportation Research Part C Emerging Technologies

Yutian Pang, Daniel Delahaye, John-Paul Clarke
Transportation Research Part C Emerging Technologies · was arXiv

The University of Texas at Austin

Air Traffic Management and Optimization · Aerospace and Aviation Technology · Spacecraft Dynamics and Control · The University of Texas at Austin · École Nationale de l’Aviation Civile

Trajectory-based optimization for air traffic control in the terminal maneuvering area

This paper introduces a trajectory-based optimization framework for arrival sequencing and scheduling in the terminal maneuvering area (TMA). It couples an analytic path model with a nonlinear program to calculate specific speed profiles and path extensions for individual aircraft, testing three landing-order policies (FEFS, FOFFS, and FOFFS with Constrained Position Shifting) under simulated wind conditions. Monte Carlo experiments on a simplified Atlanta terminal airspace (A80) demonstrate that the FOFFS policy reduces delays, path stretch, and fuel burn compared to FEFS, and that the rolling-horizon formulation runs in near real-time.

Why it matters — It shifts terminal air traffic control modeling from abstract time-delay parameters to concrete, implementable flight paths and speed profiles, proving that geometric asymmetries in arrival streams can be computationally exploited in real-time to reduce fuel burn and delays.

Caveat: The framework's performance and real-time feasibility were validated using a simplified model of a single terminal maneuvering area (Atlanta's A80) rather than a live, fully complex airspace deployment.

Transportation Research Part C Emerging Technologies · doi

Still cited

Iain D. Stewart, T. R. Oke (2012), Local Climate Zones for Urban Temperature Studies 1 of today's items cite it · 41 of 3240 in the archive stand on it

Also published today

These appeared today in journals we track. Their abstracts are not openly available, so we cannot summarise them.