Results 231 to 240 of about 26,118 (326)

Hawking's Singularity Theorem for Lipschitz Lorentzian Metrics. [PDF]

open access: yesCommun Math Phys
Calisti M   +4 more
europepmc   +1 more source

Ionospheric Characterization Over Iran Using Multi‐Frequency IMB HF Transmitters and Global WSPRNET Reception During the 12 November 2025 Geomagnetic Storm

open access: yesSpace Weather, Volume 24, Issue 6, June 2026.
Abstract The Ionospheric Monitoring Beacon network in Iran provides continuous, multi‐frequency high‐frequency (HF) transmissions using WSPRNET modulation, enabling global reception and near–real‐time monitoring of ionospheric propagation conditions.
A. Mahmoudian   +2 more
wiley   +1 more source

Environmental Preferences and Functional Variations of Methanotrophs in Northeast Qinghai‐Tibet Plateau Wetlands

open access: yesEnvironmental Microbiology Reports, Volume 18, Issue 3, June 2026.
Significant environmental preference between type I and type II methanotrophs is regulated by soil ion concentration (pH and electrical conductivity) in wetlands. Type II methanotrophs (Methylocystis, etc.) contributes more to soil methane oxidation than type I methanotrophs.
Kun He   +5 more
wiley   +1 more source

Flood Hazard Mapping in a Data‐Scarce Urban Watershed Using Analytical Hierarchy Process and Fuzzy Logic: A Case Study of Cuttack, India

open access: yesJournal of Flood Risk Management, Volume 19, Issue 2, June 2026.
ABSTRACT Floods are among the most frequent and damaging natural hazards in India, particularly affecting low‐lying urban areas in the eastern regions such as Cuttack, Odisha. This study aims to develop a flood hazard susceptibility map for the Cuttack district in Odisha, India, using a combined Analytical Hierarchy Process (AHP) and fuzzy logic ...
Siprarani Pradhan   +3 more
wiley   +1 more source

Metric geometry of spaces of persistence diagrams. [PDF]

open access: yesJ Appl Comput Topol
Che M   +3 more
europepmc   +1 more source

Totally geodesic Einstein spaces [PDF]

open access: yesBulletin of the American Mathematical Society, 1939
openaire   +2 more sources

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

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