Results 51 to 60 of about 118,194 (289)

Identifying recharge under subtle ephemeral features in a flat-lying semi-arid region using a combined geophysical approach [PDF]

Hydrology and Earth System Sciences, 2020
Identifying and quantifying recharge processes linked to ephemeral surface water features is challenging due to their episodic nature. We use a combination of well-established near-surface geophysical methods to provide evidence of a surface and ...
B. A. Flinchum, E. Banks, M. Hatch, M. Hatch, O. Batelaan, L. J. M. Peeters, S. Pasquet   +6 more
doaj   +1 more source

Lateral variations in the crustal structure of the Indo-Eurasian collision zone [PDF]

, 2018
We thank Michael Ritzwoller and two anonymous reviewers for constructive comments that have helped improve the manuscript. The majority of the seismic data used in this study were downloaded from IRIS DMC.
Gilligan, Amy, Priestley, Keith
core   +1 more source

Towards surface wave tomography with 3D resolution and uncertainty

Seismica
Surface-wave tomography is crucial for mapping upper-mantle structure in poorly instrumented regions such as the oceans. However, data sparsity and errors lead to tomographic models with complex resolution and uncertainty, which can impede meaningful ...
Franck Latallerie, Christophe Zaroli, Sophie Lambotte, Alessia Maggi, Andrew Walker, Paula Koelemeijer   +5 more
doaj   +1 more source

A Pilot Study of Wet Lung Using Lung Ultrasound Surface Wave Elastography in an Ex Vivo Swine Lung Model

Applied Sciences, 2019
Extravascular lung water (EVLW) is a basic symptom of congestive heart failure and other conditions. Computed tomography (CT) is standard method used to assess EVLW, but it requires ionizing radiation and radiology facilities.
Xiaoming Zhang, Boran Zhou, Alex X. Zhang   +2 more
doaj   +1 more source

Surface-wave group-delay and attenuation kernels [PDF]

, 2006
We derive both 3-D and 2-D Fréchet sensitivity kernels for surface-wave group-delay and anelastic attenuation measurements. A finite-frequency group-delay exhibits 2-D off-ray sensitivity either to the local phase-velocity perturbation δc/c or to its ...
Dahlen, F. A., Zhou, Ying
core   +1 more source

Conditioning bounds for traveltime tomography in layered media [PDF]

, 2011
This paper revisits the problem of recovering a smooth, isotropic, layered wave speed profile from surface traveltime information. While it is classic knowledge that the diving (refracted) rays classically determine the wave speed in a weakly well-posed ...
Abramowitz M, Aki K, Bal G, Bateman H, Collar A R, DeVore R, Grenander U, H Baek, Herglotz G, Knutson A, L Demanet, Leung S, Shearer P, Shohat J, Simon B, Stefanov P, Stork C, Whitham G B, Wiechert E   +18 more
core   +3 more sources

Linking neurogenesis, oligodendrogenesis, and myelination defects to neurodevelopmental disruption in primary mitochondrial disorders

FEBS Letters, EarlyView.
Mitochondrial remodeling shapes neural and glial lineage progression by matching metabolic supply with demand. Elevated OXPHOS supports differentiation and myelin formation, while myelin compaction lowers mitochondrial dependence, revealing mitochondria as key drivers of developmental energy adaptation.
Sahitya Ranjan Biswas, Porter L. Tomsick, Alicia M. Pickrell, Paul D. Morton   +3 more
wiley   +1 more source

The Slab Puzzle of the Alpine‐Mediterranean Region: Insights From a New, High‐Resolution, Shear Wave Velocity Model of the Upper Mantle

Geochemistry, Geophysics, Geosystems, 2020
Mediterranean tectonics since the Lower Cretaceous has been characterized by a multiphase subduction and collision history with temporally and spatially variable, small‐scale plate configurations.
Amr El‐Sharkawy, Thomas Meier, Sergei Lebedev, Jan H. Behrmann, Mona Hamada, Luigia Cristiano, Christian Weidle, Daniel Köhn   +7 more
doaj   +1 more source

Diffraction tomography using multimode surface waves [PDF]

Journal of Geophysical Research: Solid Earth, 1997
A new method is described that makes it feasible to include scattered and converted surface waves into waveform inversions for the three‐dimensional (3‐D) structure of the Earth. The single scattering (Born) approximation forms the basis of the method. In order to minimize the amplitude of the scattered wave field, the background model is first adapted
T. Meier, S. Lebedev, G. Nolet, F. A. Dahlen   +3 more
openaire   +1 more source

AAA+ protein unfoldases—the Moirai of the proteome

FEBS Letters, EarlyView.
AAA+ unfoldases are essential molecular motors that power protein degradation and disaggregation. This review integrates recent cryo‐electron microscopy (cryo‐EM) structures and single‐molecule biophysical data to reconcile competing models of substrate translocation.
Stavros Azinas, Marta Carroni
wiley   +1 more source