Results 21 to 30 of about 64,813 (265)

Lab and Field Tests of a Low‐Cost 3‐Component Seismometer for Shallow Passive Seismic Applications

open access: yesEarth and Space Science, 2023
We performed laboratory tests and field surveys to evaluate the performance of a low‐cost 3‐component seismometer, consisting of three passive electromagnetic spring‐mass sensors, whose 4.5 Hz natural frequency is extended down to 0.5 Hz thanks to hyper ...
D. Arosio   +4 more
doaj   +1 more source

Vibration analysis and models of adjacent structures controlled by magnetorheological dampers [PDF]

open access: yes, 2017
This paper deals with the vibration analysis of adjacent structures controlled by a magnetorheological (MR) damper and with the discussion of a numerical procedure for identification and definition of a reliable finite element model. The paper describes
Basili, Michela, DE ANGELIS, Maurizio
core   +3 more sources

Application of passive seismic to the detection of buried hollows [PDF]

open access: yes, 2015
Pilot studies involving the use of passive seismic techniques in a range of geological settings and applications, e.g., mapping bedrock, studies of soil erosion and Quaternary mapping have shown that it is a versatile, non-invasive and economic ...
Banks, VJ   +7 more
core   +1 more source

Hybrid Passive Control Strategies for Reducing the Displacements at the Base of Seismic Isolated Structures [PDF]

open access: yes, 2019
In this paper, the use of hybrid passive control strategies to mitigate the seismic response of a base-isolated structure is examined. The control performance of three different types of devices used for reducing base displacements of isolated buildings ...
Di Matteo A., Masnata C., Pirrotta A.
core   +1 more source

PARTOS - Passive and Active Ray TOmography Software: description and preliminary analysis using TOMO-ETNA experiment’s dataset

open access: yesAnnals of Geophysics, 2016
In this manuscript we present the new friendly seismic tomography software based on joint inversion of active and passive seismic sources called PARTOS (Passive Active Ray TOmography Software).
Alejandro Díaz-Moreno   +13 more
doaj   +1 more source

GPR clutter amplitude processing to detect shallow geological targets [PDF]

open access: yes, 2018
The analysis of clutter in A-scans produced by energy randomly scattered in some specific geological structures, provides information about changes in the shallow sedimentary geology.
Pérez Gracia, María de la Vega   +2 more
core   +2 more sources

Toward Workable and Cost-Efficient Monitoring of Unstable Rock Compartments with Ambient Noise

open access: yesGeosciences, 2021
Ambient Vibration-Based Structural Health Monitoring (AVB–SHM) studies on prone-to-fall rock compartments have recently succeeded in detecting both pre-failure damaging processes and reinforcement provided by bolting.
Pierre Bottelin   +6 more
doaj   +1 more source

Small optic suspensions for Advanced LIGO input optics and other precision optical experiments [PDF]

open access: yes, 2016
We report on the design and performance of small optic suspensions developed to suppress seismic motion of out-of-cavity optics in the Input Optics subsystem of the Advanced LIGO interferometric gravitational wave detector.
Arain, M. A.   +15 more
core   +3 more sources

Geophysical characterisation of the ocean–continent transition at magma-poor rifted margins [PDF]

open access: yes, 2009
Geophysical characterisation of the ocean-continent transition (OCT) at magma-poor riftedmargins has focused primarily on the determination of P wave velocities using wide-angleseismic techniques. Such experiments have shown that the OCT is heterogeneous,
Minshull, Timothy A.
core   +1 more source

Application of an Automatic Noise or Signal Removal Algorithm Based on Synchrosqueezed Continuous Wavelet Transform of Passive Surface Wave Imaging: A Case Study in Sichuan, China

open access: yesApplied Sciences, 2021
Passive surface wave imaging based on noise cross-correlation has been a research hotspot in recent years. However, because randomness of noise is difficult to achieve in reality, prominent noise sources will inevitably affect the dispersion measurement.
Jie Fang, Guofeng Liu, Yu Liu
doaj   +1 more source

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