Results 71 to 80 of about 18,650 (210)

The fractal bubble model with a cosmological constant

, 2012
We generalize the fractal bubble model (FB), recently proposed in the literature as an alternative to the standard $\Lambda$CDM cosmology, to include a non-zero cosmological constant. We retain the same volume partition of voids and walls as the original
Viaggiu, Stefano
core   +1 more source

Traveltime Tomography to Unravel the Chalk Group Structures at the Gassum CCS Site, Denmark

Geophysical Prospecting, Volume 74, Issue 3, March 2026.
ABSTRACT In carbon capture and storage (CCS) projects, it is important to investigate the seal properties, which often include the shallower part of the investigated area. Reflection seismic data in most of the Danish Basin appear less strong and coherent in the top 500 m, and hence reflectivity alone cannot be used to study the integrity of these ...
Emmanouil Konstantinidis, Michael Westgate, Alireza Malehmir, Ulrik Gregersen, Marie Keiding   +4 more
wiley   +1 more source

A Deep Learning‐Based Time Shift Objective Function for Full Waveform Inversion

Geophysical Prospecting, Volume 74, Issue 3, March 2026.
ABSTRACT Full waveform inversion (FWI) is a powerful technique for estimating high‐resolution subsurface velocity models by minimizing the discrepancy between modelled and observed seismic data. However, the oscillatory nature of seismic waveforms makes point‐wise discrepancy measures highly prone to cycle skipping, especially when the initial velocity
Mustafa Alfarhan, Fuqiang Chen, George Turkiyyah, David Keyes, Ivan Vasconcelos, Matteo Ravasi   +5 more
wiley   +1 more source

Atypical parkinsonian syndromes in French Guiana: Similarities and differences with Caribbean variants

Journal of Parkinson’s Disease
Background Atypical parkinsonian syndromes are highly prevalent in the French West Indies (FWI), making up 70% of degenerative parkinsonisms and including “Caribbean Atypical Parkinsonism”. Environmental neurotoxins from Annonaceae plants are implicated.
Amina Nasri, Hugo Chaumont, Souraya Arnaud, Benoit Tressieres, Mamadou Sow, Angéla Lackmy, Régine Edragas, Mathieu Nacher, Bertrand de Toffol, Emmanuel Roze, Annie Lannuzel   +10 more
doaj   +1 more source

Top‐Down and Bottom‐Up Processes Jointly Explain Mesopredator Movement and Foraging Ecology

Ecology Letters, Volume 29, Issue 3, March 2026.
This study integrates top‐down (polar bear habitat selection) and bottom‐up (fish distribution) processes to test how mesopredators (ringed seals) balance risk–reward tradeoffs in habitat selection. Ringed seals reduced their space use and foraging time in response to predation risk, yet accepted higher risk when prey diversity was elevated ...
Katie R. N. Florko, Tyler R. Ross, Steven H. Ferguson, Joseph M. Northrup, Martyn E. Obbard, Gregory W. Thiemann, David J. Yurkowski, Marie Auger‐Méthé   +7 more
wiley   +1 more source

Developing user-informed fire weather projections for Canada

Climate Services
Increasing fire danger due to climate-driven fire weather changes has expanded demand for projections of future wildfire information for Canada. Addressing this need, we developed “CanLEAD-FWI,” consisting of novel, high-resolution projections of fire ...
Laura Van Vliet, Jeremy Fyke, Sonya Nakoneczny, Trevor Q. Murdock, Pouriya Jafarpur   +4 more
doaj   +1 more source

Multi‐Scale Electrical Conductivity Model of the Contiguous United States

Geophysical Research Letters, Volume 53, Issue 4, 28 February 2026.
Abstract The completion of the Magnetotelluric (MT) USArray across the contiguous US enables continental‐scale 3‐D imaging of the asthenosphere‐lithosphere electrical structure. We present a novel 3‐D model of the contiguous United States (MECMUS), derived from a single inversion of the now‐completed USMTArray data set.
Federico D. Munch, Alexander Grayver
wiley   +1 more source

Gromov-Witten theory and cycle-valued modular forms [PDF]

, 2012
In this paper, we proved generating functions of Gromov-Witten cycles of the elliptic orbifold lines with weights (3,3,3), (4,4,2), and (6,3,2) are cycle-valued quasi-modular forms.
Milanov, Todor, Ruan, Yongbin, Shen, Yefeng   +2 more
core  

A brief exploration of open-source gradient-based numerical optimization Python libraries for full-waveform inversion

Seismica
Geoscientists favor Python for its user-friendly interface and scientific packages that support application implementation. Python's capabilities make it particularly useful for seismic full waveform inversion (FWI), which can see its implementation ...
Oscar Mojica
doaj   +1 more source

Feasibility study of full waveform inversion of Love-SH waves for detecting small-scale shallow anomalies

AIP Advances
In engineering surveys, conventional SH-wave seismic exploration methods exhibit limited resolution for detecting small-scale shallow anomalies, often failing to meet practical requirements.
Xu Sun, Wei Xu, Yingju Xiong, Yong Li, Xiaoqing Song   +4 more
doaj   +1 more source