Results 71 to 80 of about 19,474 (278)

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

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

The impact of COVID-19 lockdown measures on high-frequency seismic ambient noise in Greece: Utilizing strong-motion seismograph networks for human activity monitoring in urban environments

Seismica
Vibrations generated by anthropogenic activity propagate into the Earth’s subsurface as high-frequency seismic waves. The Covid-19 pandemic, which prompted widespread adoption of prevention policies in 2020, including social distancing measures, stay-at-
Dimitrios Giannopoulos, Christos Evangelidis, Efthimios Sokos   +2 more
doaj   +1 more source

Denoising Method Based on Spectral Subtraction in Time-Frequency Domain

Advances in Civil Engineering, 2021
In view of the key problem that a large amount of noise in seismic data can easily induce false anomalies and interpretation errors in seismic exploration, the time-frequency spectrum subtraction (TF-SS) method is adopted into data processing to reduce ...
Lei Hao, Shuai Cao, Pengfei Zhou, Lei Chen, Yi Zhang, Kai Li, Dongdong Xie, Yijun Geng   +7 more
doaj   +1 more source

Ambient seismic noise

Terrae Didatica, 2019
Rainfall-induced variations in pore water pressures are the most common sources of significant disasters like landslides, dams’ failure, and other structural collapses. This study aimed at communicating preliminary results of seasonal monitoring of the Sobradinho landslide, Brasilia, Brazil, using ambient seismic noise.
Yawar Hussain, Hernan Martinez-Carvajal, Cristobal Condori, Rogério Uagoda, Martín Cárdenas-Soto, André Luís Brasil Cavalcante, Luciano Soares da Cunha, Salvatore Martino   +7 more
openaire   +1 more source

rouskinlab/seismic-rna: Signal-to-noise Ratio [PDF]

<h1>What's new in 0.16.4</h1> <h2>New Features</h2> <ul> <li>Graph rolling signal-to-noise ratios (i.e. AC versus GU) for DMS data with <code>seismic graph snrroll</code> (only relevant for <code> ...
Alberic de Lajarte, heWhosShouldersBlockTheSun, Yves Martin des Taillades, Matty Allan, Justin Aruda   +4 more
core   +1 more source

Noise-based seismic monitoring of the Campi Flegrei caldera [PDF]

, 2017
The Campi Flegrei caldera is one of the highest risk volcanic fields worldwide, because of its eruptive history and the large population hosted within the caldera.
Zaccarelli, Lucia, Francesca Bianco, Bianco, Francesca, Lucia Zaccarelli   +3 more
core   +1 more source

The Evolution of Autonomous Systems for Planetary Cave Exploration: A Review

Journal of Field Robotics, EarlyView.
ABSTRACT The exploration of Subsurface Access Points (SAPs), such as lava tubes on the Moon and Mars, has gained significant interest due to their potential as stable environments shielded from surface radiation and temperature extremes. These sites are considered high‐value targets for detecting water and signs of ancient life, and assessing their ...
Sarah Swinton, Daniel Mitchell, Jamie Blanche, Euan McGookin, David Flynn   +4 more
wiley   +1 more source

Ground-Truth-Free 3D Seismic Denoising Based on Diffusion Models: Achieving Effective Constraints Through Embedded Self-Supervised Noise Modeling

Remote Sensing
Three-dimensional (3D) seismic data, essential for revealing subsurface structures and exploring oil and gas resources, are often contaminated by noise with an unknown prior distribution.
Zhonghan Zhang, Guihe Qin, Yanhua Liang, Minghui Sun, Yingqing Wang, Jiaru Song   +5 more
doaj   +1 more source

The Pier Luigi Nervi's concrete structure of Palazzetto dello Sport: Modeling and dynamic characterization

Structural Concrete, EarlyView.
Abstract This paper presents a numerical and experimental study aimed at the modeling and dynamic characterization of the reinforced concrete structure of the Palazzetto dello Sport in Rome, designed and by Pier Luigi Nervi with Annibale Vitellozzi, and built by Nervi & Bartoli contractors in 1956‐57.
Jacopo Ciambella, Gianluca Ranzi, Francesco Romeo   +2 more
wiley   +1 more source