Results 191 to 200 of about 384,878 (250)

Single‐Breathhold 3D MR Elastography in the Liver, With Simultaneous R2* and PDFF Mapping

Magnetic Resonance in Medicine, EarlyView.
Purpose To develop a sequence for the rapid acquisition of MR elastography (MRE) parameters in 3D, with simultaneous measurement of proton‐density fat fraction (PDFF) and R2* for multiparametric assessment of liver disease. Methods The proposed sequence uses an interleaved motion‐encoding scheme to acquire 3D volumes of all motion encodings and wave ...
Donovan P Tripp, Anne‐Sophie van Schelt, Omar Darwish, Karl P Kunze, Shamsa Al Harthy, Nader S Metwalli, Ahmed M Gharib, Claudia Prieto, René M Botnar, Ralph Sinkus, Radhouene Neji   +10 more
wiley   +1 more source

Kinetic Compensation of Barrel Launch Under High‐Speed Solid‐Phase Particulate Impacts

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT An accurate launch‐dynamics computational method is critical for barrel weapon service life assessment and multiphase physics field refinement. Given the lack of studies on the solid‐phase buildup behavior at the projectile base, this paper provides an improved method for calculating the launching dynamics under high pressure and high speed ...
Zhiyi He, Guolai Yang, Quanzhao Sun, Shuli Li   +3 more
wiley   +1 more source

Numerical Insights Into the Resistance Reduction Mechanisms of Forward Tapered Transoms in High‐Speed Catamaran: A Computational Fluid Dynamics‐Based Study

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT This study investigates the hydrodynamic influence of forward transom tapering on a displacement catamaran hull using computational fluid dynamics (CFD) simulations. Five taper configurations ranging from a vertical transom base design to a fully tapered stern (1.00B) were evaluated over a wide Froude number range (Fr = .3 to 1.0).
Chalermkiat Nuchturee, Chairat Napasaksri, Ramil Kesvarakul, Sarawuth Srinakaew   +3 more
wiley   +1 more source

A Passive Low‐Frequency, High‐Sensitivity Diamagnetic Levitation Accelerometer

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT Despite the great potential of diamagnetic levitation accelerometers in detecting low‐frequency and weak motion, there is still a demand to further enhance their sensitivity for geophysical and microgravity applications. In this study, a straightforward structural modulating approach is presented to enhance the sensitivity of diamagnetic ...
Yuanping Xu, Yang Wang, Lu Yang, Jin Zhou, Zhiqiang Zhang, Yanxiao Lei   +5 more
wiley   +1 more source

Epistemic opacity in Antarctic science: Unknowing the last frontier

People and Nature, EarlyView.
Abstract Antarctica is facing intensifying pressures from climate change, industrial fishing, tourism and renewed geopolitical competition, even as scientific activity on the continent reaches unprecedented levels. We argue that this proliferation of research often fails to deliver the integrated, policy‐relevant knowledge needed for precautionary ...
Virginia Morandini, Álvaro Soutullo
wiley   +1 more source

Hybrid Thermosetting Polymer Nanocomposite Thin Films With Optimized Thermal Conductivity and Mechanical Reinforcement

Polymer Engineering &Science, EarlyView.
3ω Study of Hybrid Nanostructure Epoxy Thin Films for Thermal Interfaces. ABSTRACT Epoxy‐based thin films reinforced with graphene oxide (GO), hexagonal boron nitride (h‐BN), and their hybrid combination (GO/h‐BN) at low filler contents (< 1 wt%) were developed to advance thermosetting nanocomposites for high‐performance thermal interface materials ...
Vinicius Alvarenga, Camila M. Maroneze, Matheus S. Dias, Bruno Milton Oliveira Silva, Jaime Taha‐Tijerina, Christiano J. S. de Matos, Hélio Ribeiro   +6 more
wiley   +1 more source

Gravity wave-planetary wave interaction simulated by gravity wave ray-tracing

, 2012
Kalisch, S., Preusse, P., Ern, M., Eckermann, S.D., Riese, M.   +4 more
openaire   +1 more source

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Gravity-Capillary Wave Spectral Modulation by Gravity Waves

IEEE Transactions on Geoscience and Remote Sensing, 2017
In order to more fully understand the specific hydrodynamic relationship between young wind-generated gravity-capillary waves and longer gravity waves, a laboratory experiment was devised to observe changes in short wave spectral behavior over the phase of a long wave.
Nathan J. M. Laxague, Milan Curcic, Jan-Victor Bjorkqvist, Brian K. Haus   +3 more
openaire   +1 more source

Surface gravity-wave lensing

Physical Review E, 2014
Here we show that a nonlinear resonance between oceanic surface waves caused by small seabed features (the so-called Bragg resonance) can be utilized to create the equivalent of lenses and curved mirrors for surface gravity waves. Such gravity wave lenses, which are merely small changes to the seafloor topography and therefore are surface noninvasive ...
Ryan B, Elandt, Mostafa, Shakeri, Mohammad-Reza, Alam   +2 more
openaire   +2 more sources

Mirages with Atmospheric Gravity Waves

Light and Color in the Open Air, 1993
Mirages observed over an interval of time occasionally display slow variations that seem to be periodic.
W H, Lehn, W K, Silvester, D M, Fraser
openaire   +2 more sources