Results 121 to 130 of about 715 (188)

D‐Rex++: A New Tool to Simulate Olivine's Crystallographic Preferred Orientation in the Upper Mantle With Grain Size‐Coupled Rheology

open access: yesJournal of Geophysical Research: Solid Earth, Volume 131, Issue 6, June 2026.
Abstract Understanding the co‐evolution of olivine's crystallographic preferred orientation (CPO) and grain size is essential for capturing the dynamics of Earth's upper mantle. Existing CPO evolution models, such as D‐Rex, successfully predict CPO development but overpredict CPO strength and do not provide a physically meaningful grain size, limiting ...
Srivatsan Vedavyas   +3 more
wiley   +1 more source

Effects of Comet Encke's Meteoroid Stream on the Seasonal Variation of Mercury's Ca Exosphere

open access: yesJournal of Geophysical Research: Planets, Volume 131, Issue 6, June 2026.
Abstract Mercury's calcium (Ca) exosphere, observed by NASA's MESSENGER mission, exhibits high temperatures (>50000 K) and pronounced seasonal variability, with its source mainly on the dawn side. Enhanced Ca emission near True Anomaly Angle (TAA) ∼25° and ∼150° has been attributed to Comet 2P/Encke meteoroid streams.
M. Moroni   +18 more
wiley   +1 more source

The Lorentzian oscillator group as a geodesic orbit space

open access: yes, 2012
9 pags. ; 2 tab. ; PACS numbers: 02.20.Qs, 04.65,+eWe prove that the four-dimensional oscillator group Os endowed with any of its usual left-invariant Lorentzian metrics, is a Lorentzian geodesic (so in particular null-geodesic) orbit space with some of ...
Gadea, Pedro M.   +5 more
core   +1 more source

Apparent Forest‐Cover Stability Conceals Structural and Functional Landscape Reorganization in a Human‐Modified Atlantic Forest–Cerrado Ecotone

open access: yesJournal of Biogeography, Volume 53, Issue 6, June 2026.
ABSTRACT Aim To evaluate how long‐term forest turnover reshapes habitat structure and functional connectivity in a human‐modified Atlantic Forest–Cerrado ecotone landscape. Location Sarapuí River Basin, southeastern Brazil. Taxon Native forest vegetation and forest‐dependent taxa of the Atlantic Forest–Cerrado ecotone.
Milton Vinícius Morales   +1 more
wiley   +1 more source

Crime Prevention Through Private Actors: Evidence From a Policy Change at a Large UK Supermarket Chain

open access: yesOxford Bulletin of Economics and Statistics, Volume 88, Issue 3, Page 426-440, June 2026.
ABSTRACT This paper investigates the effectiveness of private actors in contributing to crime prevention. We leverage well‐publicised increases in security measures, including additional security guards and tagging of goods, by Tesco, a large UK supermarket chain.
Nils Braakmann, Wednesday Croft
wiley   +1 more source

Singularities of optimal control problems on some 6-D lie groups

open access: yes, 2007
This paper considers the motion planning problem for oriented vehicles travelling at unit speed in a 3-D space. A Lie group formulation arises naturally and the vehicles are modeled as kinematic control systems with drift defined on the orthonormal frame
Biggs, James   +7 more
core   +1 more source

Land Subsidence Susceptibility Mapping in Semi‐Arid Regions Using PS‐InSAR and Tree‐Based Ensemble Machine Learning: A Case Study From Çumra, Türkiye

open access: yesTransactions in GIS, Volume 30, Issue 4, June 2026.
ABSTRACT Land subsidence is an increasing environmental hazard in semi‐arid agricultural basins where intensive groundwater abstraction, compressible geological units, and expanding land‐use pressures interact. This study presents a PS‐InSAR and machine‐learning‐based framework for land subsidence susceptibility mapping in the Çumra District of the ...
Burhan Baha Bilgilioğlu
wiley   +1 more source

The Motion of Point Particles in Curved Spacetime

open access: yesLiving Reviews in Relativity, 2004
This review is concerned with the motion of a point scalar charge, a point electric charge, and a point mass in a specified background spacetime. In each of the three cases the particle produces a field that behaves as outgoing radiation in the wave zone,
Poisson Eric
doaj  

Seroprevalence and Risk Factors for Hepatitis E Virus in a Metropolis of Northeastern Brazil: A Population‐Based Survey

open access: yesZoonoses and Public Health, Volume 73, Issue 4, Page 326-335, June 2026.
ABSTRACT Introduction Hepatitis E virus (HEV) is a leading cause of acute hepatitis worldwide. While traditionally linked to poor sanitation in endemic areas, evidence shows increasing circulation in developed settings. In Brazil, however, population‐based data remain limited.
Carolline A. Mariz   +8 more
wiley   +1 more source

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