Results 101 to 110 of about 3,552,226 (242)

Bootstrapping the spinning two body problem in dynamical Chern-Simons gravity using worldline QFT

open access: yesJournal of High Energy Physics
In this paper, we compute the WQFT partition function, specifically the eikonal phase in a black hole scattering event in the dynamical Chern-Simons theory, using the techniques of spinning worldline quantum field theory.
Arpan Bhattacharyya   +3 more
doaj   +1 more source

Joint P- and S-Wave VSP Traveltime Tomography via Well Log-Guided Physics-Informed Neural Networks

open access: yesIEEE Access
Traveltime tomography is widely used in seismology to construct accurate long-wavelengthsubsurface velocity models and to investigate the Earth’s internal structure and dynamic processes.
Tengyu Wang   +5 more
doaj   +1 more source

Establishment and validation of a hair fall atlas for Chinese men based on trichoscopy

open access: yesInternational Journal of Cosmetic Science, Volume 48, Issue 3, Page 657-666, June 2026.
A new hair fall atlas with 7 scales is established and validated and ready to publish as a new methodology. We observed good consistency between the dermatologists' grading (PCC >0.8), and a strong correlation shown between clinical scores and hair fall attributes based on image analysis (|p| > 0.8).
Rui Ma   +11 more
wiley   +1 more source

A Geometrical Approach for Solving 2D Eikonal Equation

open access: yes, 2005
Solving the Eikonal equation is popular due to its potential applications in various areas. Numerical method is the most common approach to solve the equation. This paper presents a geometric approach to solve the equation.
C. K. Au
core   +1 more source

Seismic tomography of the Gulf of Corinth: a comparison of methods

open access: yesAnnals of Geophysics, 1997
At a local scale, travel-time tomography requires a simultaneous inversion of earthquake positions and velocity structure. We applied a joint iterative inversion scheme where medium parameters and hypocenter parameters were inverted simultaneously.
P. Podvin, J. Virieux, E. Le Meur
doaj   +1 more source

Hunga‐Tonga Volcano Plumbing System Inferred From Virtual Seismometer Approach

open access: yesGeochemistry, Geophysics, Geosystems, Volume 27, Issue 5, May 2026.
Abstract We present a surface wave tomography application based on event‐pair interferometry to investigate local (∼100 km) mid‐ocean crustal structures, with a particular focus on imaging a potential crustal solidified intrusive complex in a region lacking seismic stations.
Taghi Shirzad   +3 more
wiley   +1 more source

Characteristic fast marching method on triangular grids for the generalized eikonal equation in moving media

open access: yes, 2015
The governing equation of the first arrival time of a monotonically propagating front (wavefront or shock front) in an inhomogeneous moving medium is an anisotropic eikonal equation, called the generalized eikonal equation in moving media.
DAHIYA, D, BASKAR, S
core   +1 more source

Seismicity, Repeating Earthquakes, and Tomographic Imaging of the Blanco Transform Fault System, Northeast Pacific

open access: yesJournal of Geophysical Research: Solid Earth, Volume 131, Issue 5, May 2026.
Abstract The Blanco transform fault system (BTFS) represents an evolving transform plate boundary in the Northeast Pacific Ocean. Its seismic behavior was captured with a dense network of 54 ocean‐bottom seismometers (OBS) operated for 1 year. We created a high‐resolution earthquake catalog based on different machine‐learning onset pickers.
D. Lange, Y. Ren, I. Grevemeyer
wiley   +1 more source

3D finite-difference migration of the field of refracted waves

open access: yesГеофизический журнал, 2015
The method of 3D finite-difference migration of the field of refracted waves is proposed, which takes into account their penetration into refracting strata.
A. Verpakhovskaya   +2 more
doaj   +1 more source

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