Results 161 to 170 of about 1,557 (307)

Very high resolution marine 3D seismics in shallow water environments

, 2004
The adaptation of 3D techniques to very high resolution* shallow water studies has been progressing steadily over the last years. Cost-effective VHR 3D seismics is of great interest both in the field of engineering geophysics as well as for geological ...
Missiaen, T., Henriet, J.-P., Versteeg, W.   +2 more
core  

Disrupting the herd: Recreational boating alters group dispersion within beluga whale herds

The Journal of Wildlife Management, EarlyView.
Recreational boating in beluga habitat remains poorly documented. Using land‐based observations in the Saguenay Fjord (Quebec, Canada), we show that increasing recreational boat numbers are associated with a higher probability of changes in beluga herd dispersion, suggesting behavioral disturbance and the need to integrate recreational boating into ...
Camille Kowalski, Angélique Dupuch, Jean‐François Sénécal, Jérôme Dupras, Clément Chion   +4 more
wiley   +1 more source

Horizontal-to-Vertical Spectral Ratio of Ambient Vibration Obtained with Hilbert-Huang Transform. [PDF]

Sensors (Basel), 2021
Neukirch M, García-Jerez A, Villaseñor A, Luzón F, Ruiz M, Molina L.   +5 more
europepmc   +1 more source

A novel approach for in situ benthic habitat characterization

Limnology and Oceanography: Methods, EarlyView.
Abstract Habitat heterogeneity is a key driver of temporal and spatial variability of subtidal marine benthic biodiversity. However, this makes it a challenging environment in which to measure and quantify the factors driving biodiversity in a consistent manner.
Ryan J. W. Mathews, David K. A. Barnes, Simon A. Morley, Gareth Flint, Lloyd S. Peck   +4 more
wiley   +1 more source

Bathymetric and Seismic Data, Heat Flow Data, and Age Constraints of Le Gouic Seamount, Northeastern Atlantic

Frontiers in Marine Science, 2021
Andreas Klügel, Miriam Römer, Miriam Römer, Paul Wintersteller, Paul Wintersteller, Kai-Frederik Lenz, Sebastian Krastel, Heinrich Villinger, Norbert Kaul   +8 more
doaj   +1 more source

Detecting Loosening of Bolt‐Flanged Pipe Using Smoothed Pseudo Wigner–Ville Distribution: Digital Twin‐Based Approach Using Convolution Neural Networks

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT In this paper, an integrated digital twin‐based fault‐diagnosis framework is proposed to detect bolt loosening in flanged pipe connections. The approach combines finite element‐based numerical modeling, experimental modal analysis, and advanced signal processing‐assisted deep learning to achieve reliable loosening detection under operational ...
Milad Shabani Yousefabad, Behzad Totakhaneh Bonab, Morteza Homayoun Sadeghi, Mir Mohammad Ettefagh, Mohammad Reza Chalak Qazani   +4 more
wiley   +1 more source

Scientific Applications of Distributed Acoustic Sensing: State-of-the-Art Review and Perspective. [PDF]

Sensors (Basel), 2022
Gorshkov BG, Yüksel K, Fotiadi AA, Wuilpart M, Korobko DA, Zhirnov AA, Stepanov KV, Turov AT, Konstantinov YA, Lobach IA.   +9 more
europepmc   +1 more source

A Coupled Extended Finite Element–Cohesive Zone Model for Hydraulic Fracture Propagation Under Poroelastic Effects Across Different Propagation Regimes

International Journal for Numerical and Analytical Methods in Geomechanics, EarlyView.
ABSTRACT Numerical simulation of hydraulic fracturing remains challenging due to the strong coupling between geomechanics and fluid flow when modelling multiple physical mechanisms of rock deformation, fracture evolution and fluid leak‐off. This study develops a coupled hydraulic fracture propagation framework that combines the extended finite element ...
Ran Tao, Juliana Y. Leung, Samer Adeeb
wiley   +1 more source

Early colonization before inundation consistent with northern glacial refugia in Southern Doggerland revealed by sedimentary ancient DNA. [PDF]

Proc Natl Acad Sci U S A
Allaby RG, Ware R, Cribdon R, Hansford TA, Kinnaird T, Hamilton D, Kistler L, Murgatroyd P, Bates R, Fitch S, Gaffney V.   +10 more
europepmc   +1 more source

Numerical Modeling of Geological Fault Reactivation Using Sequential Coupling Strategies

International Journal for Numerical and Analytical Methods in Geomechanics, EarlyView.
ABSTRACT The interaction between fluid flow and mechanical deformation in fault zones can lead to processes of fault reactivation, triggering potential geomechanical problems such as seismicity, well collapse, fluid migration to shallower layers, and aggravated surface subsidence.
Julio Rueda, Cristian Mejia, Roberto Quevedo, Deane Roehl   +3 more
wiley   +1 more source