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  1. Book ; Online: Remote Sensing in Applied Geophysics

    Colombero, Chiara / Comina, Cesare / Godio, Alberto

    2020  

    Keywords Research & information: general ; Alpine glaciers ; Belvedere Glacier ; ice thickness estimation ; ice bottom morphology and properties ; ground-penetrating radar (GPR) ; single-station passive seismic measurements ; horizontal-to-vertical spectral ratio (HVSR) ; archaeological prospection ; automated resistivity profiling ARP ; electrical resistivity survey ; multi-channel ground penetrating radar ; geophysical methods integration ; Chang'E-4 ; lunar penetrating radar (LPR) ; 3D velocity spectrum ; properties analysis ; remote sensing and GIS ; field geophysics ; groundwater potentiality ; West Qena ; Egypt ; mine collapse ; anthropogenic hazard ; seismology ; GNSS ; InSAR ; post-seismic deformation mechanism ; InSAR time series algorithm ; Kermanshah earthquake ; viscoelastic relaxation ; near-surface geophysics ; LiDAR ; magnetic gradiometry ; surface magnetic susceptibility ; electromagnetic induction ; Middle Woodland period ; Hopewell archaeology ; depth inversion ; sedimentary processes ; Autonomous Surface Vehicles (ASV) ; marine geophysics ; shallow water environments ; repeated 4D surveys ; NAIADI Project (New Autonomous/automatIc systems for the study AnD monitoring of aquatic envIronments) ; electrical resistivity tomography (ERT) ; frequency domain electromagnetic (FDEM) ; archaeology ; terramare ; bronze age ; elastic full waveform inversion ; acoustic-elastic coupled ; ocean bottom seismic ; multicomponent ; multiparameter ; ground penetrating radar (GPR) ; moisture content ; velocity analysis ; optimal gather ; passive seismic interferometry ; surface wave ; inversion ; shear-wave velocity ; ambient noise ; dispersion curve ; aerial archaeology ; landscape archaeology ; frequency-domain electromagnetic methods (FDEM) ; paleochannel ; Snow Eagle 601 ; aerogeophysics ; Princess Elizabeth Land ; ice-penetrating radar ; Antarctic ice sheet ; n/a
    Size 1 electronic resource (318 pages)
    Publisher MDPI - Multidisciplinary Digital Publishing Institute
    Publishing place Basel, Switzerland
    Document type Book ; Online
    Note English ; Open Access
    HBZ-ID HT021046253
    ISBN 9783039437344 ; 3039437348
    Database ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture

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  2. Article ; Online: Serially Connected Cantilever Beam-Based FBG Accelerometers: Design, Optimization and Testing.

    Reghuprasad, Aarathy Ezhuthupally / Colombero, Chiara / Godio, Alberto

    Sensors (Basel, Switzerland)

    2023  Volume 23, Issue 6

    Abstract: We focus on the design, optimization, fabrication, and testing of fiber Bragg grating (FBG) cantilever beam-based accelerometers to measure vibrations from active seismic sources in the external environment. These FBG accelerometers possess several ... ...

    Abstract We focus on the design, optimization, fabrication, and testing of fiber Bragg grating (FBG) cantilever beam-based accelerometers to measure vibrations from active seismic sources in the external environment. These FBG accelerometers possess several advantages, such as multiplexing, immunity to electromagnetic interference, and high sensitivity. Finite Element Method (FEM) simulations, calibration, fabrication, and packaging of the simple cantilever beam-based accelerometer based on polylactic acid (PLA) are presented. The influence of the cantilever beam parameters on the natural frequency and sensitivity are discussed through FEM simulation and laboratory calibration with vibration exciter. The test results show that the optimized system has a resonance frequency of 75 Hz within a measuring range of 5-55 Hz and high sensitivity of ±433.7 pm/g. Finally, a preliminary field test is conducted to compare the packaged FBG accelerometer and standard electro-mechanical 4.5-Hz vertical geophones. Active-source (seismic sledgehammer) shots are acquired along the tested line, and both systems' experimental results are analyzed and compared. The designed FBG accelerometers demonstrate suitability to record the seismic traces and to pick up the first arrival times. The system optimization and further implementation offer promising potential for seismic acquisitions.
    Language English
    Publishing date 2023-03-16
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2052857-7
    ISSN 1424-8220 ; 1424-8220
    ISSN (online) 1424-8220
    ISSN 1424-8220
    DOI 10.3390/s23063188
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Assessing energy balance via seismic and mechanical observations in high temperature induced crack damage in marbles.

    Vagnon, Federico / Vinciguerra, Sergio Carmelo / Comina, Cesare / Colombero, Chiara / Ferrero, Anna Maria / Missagia, Roseane

    Heliyon

    2023  Volume 9, Issue 9, Page(s) e19184

    Abstract: Assessing the rock physical and mechanical behavior under different temperatures has become of utmost importance. It is well known that thermal stresses induce significant crack damage in rocks due to thermal expansion or phase transformation and volume ... ...

    Abstract Assessing the rock physical and mechanical behavior under different temperatures has become of utmost importance. It is well known that thermal stresses induce significant crack damage in rocks due to thermal expansion or phase transformation and volume changes. Quantifying and forecasting the evolution of rock physical and mechanical parameters with temperature is thus crucial for evaluating rock integrity in many applications such as geothermal fields, nuclear waste storage, wildfire or volcanic processes. In marbles the degree of previous exposure to temperature and the chemical composition (i.e. calcite vs dolomite) plays a key role for controlling the mechanical evolution under temperature. Moreover separating out the energy contribution provided by anelastic processes driving crack damage and elastic reversible deformation under increasing temperature remains an open challenge. With these aims, three sample sets of marbles with different contents of calcite and dolomite from two Brazilian quarries were tested under different temperature conditions (from room temperature up to 600 °C). A marked increase of thermal cracking was observed after 400 °C, accompanying mass loss up to 1% and porosity increase. Moreover, a significant drop in seismic wave velocities, uniaxial compressive strength and electrical resistivity, in wet conditions, was also detected. Spectral behavior from seismic traces and energy dissipation from stress-strain curves were analyzed. A dominance of the dissipated energy compared to the elastic one was observed and related to the generation of new fracturing surfaces. This hypothesis was supported by the spectral behavior showing multiple scattering effects in the high frequency components, with an increase in attenuation. The results suggested that the percentage of dolomite has a high influence on the mechanical behavior even at low temperature, mirroring the prevalence of brittle processes in dolomitic marbles. This study represents a comprehensive benchmark for the study of effect of temperature on rocks because of its multidisciplinary and multimethod approach and the demonstrated sensitivity to subtle textural changes. Moreover, it provides a reliable tool for crack damage analysis at each thermal stress.
    Language English
    Publishing date 2023-08-24
    Publishing country England
    Document type Journal Article
    ZDB-ID 2835763-2
    ISSN 2405-8440
    ISSN 2405-8440
    DOI 10.1016/j.heliyon.2023.e19184
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Ambient Seismic Noise and Microseismicity Monitoring of a Prone-To-Fall Quartzite Tower (Ormea, NW Italy)

    Colombero, Chiara / Godio, Alberto / Jongmans, Denis

    Remote Sensing. 2021 Apr. 24, v. 13, no. 9

    2021  

    Abstract: Remote sensing techniques are leading methodologies for landslide characterization and monitoring. However, they may be limited in highly vegetated areas and do not allow for continuously tracking the evolution to failure in an early warning perspective. ...

    Abstract Remote sensing techniques are leading methodologies for landslide characterization and monitoring. However, they may be limited in highly vegetated areas and do not allow for continuously tracking the evolution to failure in an early warning perspective. Alternative or complementary methods should be designed for potentially unstable sites in these environments. The results of a six-month passive seismic monitoring experiment on a prone-to-fall quartzite tower are here presented. Ambient seismic noise and microseismicity analyses were carried out on the continuously recorded seismic traces to characterize site stability and monitor its possible irreversible and reversible modifications driven by meteorological factors, in comparison with displacement measured on site. No irreversible modifications in the measured seismic parameters (i.e., natural resonance frequencies of the tower, seismic velocity changes, rupture-related microseismic signals) were detected in the monitored period, and no permanent displacement was observed at the tower top. Results highlighted, however, a strong temperature control on these parameters and unusual preferential vibration directions with respect to the literature case studies on nearly 2D rock columns, likely due the tower geometric constraints, as confirmed by 3D numerical modeling. A clear correlation with the tower displacement rate was found in the results, supporting the suitability of passive seismic monitoring systems for site characterization and early waning purposes.
    Keywords evolution ; geophysics ; landslides ; quartzite ; temperature ; vibration ; Italy
    Language English
    Dates of publication 2021-0424
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article
    Note NAL-AP-2-clean
    ZDB-ID 2513863-7
    ISSN 2072-4292
    ISSN 2072-4292
    DOI 10.3390/rs13091664
    Database NAL-Catalogue (AGRICOLA)

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  5. Article: Special Issue “Remote Sensing in Applied Geophysics”

    Colombero, Chiara / Comina, Cesare / Godio, Alberto

    Remote Sensing. 2020 Oct. 18, v. 12, no. 20

    2020  

    Abstract: The Special Issue “Remote Sensing in Applied Geophysics” is focused on recent and upcoming advances in the combined application of remote sensing and applied geophysics techniques, sharing the advantages of being non-invasive research methods, suitable ... ...

    Abstract The Special Issue “Remote Sensing in Applied Geophysics” is focused on recent and upcoming advances in the combined application of remote sensing and applied geophysics techniques, sharing the advantages of being non-invasive research methods, suitable for surface and near-surface high-resolution investigations of even wide and remote areas [...]
    Keywords geophysics ; remote sensing ; research methods
    Language English
    Dates of publication 2020-1018
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article
    Note NAL-light
    ZDB-ID 2513863-7
    ISSN 2072-4292
    ISSN 2072-4292
    DOI 10.3390/rs12203413
    Database NAL-Catalogue (AGRICOLA)

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  6. Article ; Online: Microgeophysics and geomatics data integration reveals the internal fracturing conditions of the statue of Ramses II (Museo Egizio, Torino, Italy).

    Colombero, Chiara / Dabove, P / Grasso, N / Khosro Anjom, F / Pace, F / Aicardi, S

    Scientific reports

    2022  Volume 12, Issue 1, Page(s) 9933

    Abstract: The combined acquisition of 3D ultrasonic tomography and radar scans is growing for cultural heritage diagnostics. Both methods proved to be efficient in the detection and location of fractures and weaknesses within the investigated artefacts. Although ... ...

    Abstract The combined acquisition of 3D ultrasonic tomography and radar scans is growing for cultural heritage diagnostics. Both methods proved to be efficient in the detection and location of fractures and weaknesses within the investigated artefacts. Although the two techniques are widely applied together, an integrated approach for data interpretation is still missing. We present the results of radar and ultrasonic prospections carried out on the statue of the young Ramses II, an absolute masterpiece of the Egyptian art preserved in the collection of the Museo Egizio of Torino (Italy). Geophysical results are incorporated within the 3D model of the statue retrieved from total station measurements, ground-based and handheld laser scanning. A data integration approach is then proposed for the joint interpretation of the geophysical results, exploiting the final ultrasonic velocity model and radar attribute analysis (i.e. local dissimilarity computation) to define a combined damage index. The proposed methodology is efficient in fracture detection and location and improves the readability of the final results also for non-expert geophysical interpreters, offering guidance to the museum for preservation and restoration of the masterpiece.
    MeSH term(s) Egypt ; Italy ; Museums ; Radar
    Language English
    Publishing date 2022-06-15
    Publishing country England
    Document type Journal Article
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-022-14300-z
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: Hidden soils and their carbon stocks at high-elevation in the European Alps (North-West Italy)

    Pintaldi, Emanuele / D'Amico, Michele E / Colombo, Nicola / Colombero, Chiara / Sambuelli, Luigi / De Regibus, Claudio / Franco, Diego / Perotti, Luigi / Paro, Luca / Freppaz, Michele

    Catena. 2021 Mar., v. 198

    2021  

    Abstract: Alpine soils store large quantities of total organic carbon (TOC). Given their high sensitivity to climate change, they may release large amounts of CO₂ in a warming climate scenario. Thus, it is important to know their C stocks in order to estimate its ... ...

    Abstract Alpine soils store large quantities of total organic carbon (TOC). Given their high sensitivity to climate change, they may release large amounts of CO₂ in a warming climate scenario. Thus, it is important to know their C stocks in order to estimate its possible release. While C stocks of forest, dwarf shrub and alpine grassland soils are well documented, little is known about soils and C stocks in high-elevated periglacial environments dominated by frost-driven processes. The object of this study is the periglacial environment of the Stolenberg Plateau (LTER site Istituto Mosso, 3030 m a.s.l.), at the foot of the Monte Rosa Massif (NW Italian Alps). The plateau is mostly covered by a thick stony layer, organized in periglacial blockfields and blockstreams. The plant cover reaches only 3–5%. During the construction of a chair lift, open trenches revealed, unexpectedly, well-developed soils under the active periglacial stone cover. In particular, thick (30–65 cm) and dark TOC-rich A horizons were observed. Below these Umbric horizons, Cambic Bw ones were developed but discontinuous. Despite the lack of vegetation, C stocks were remarkably high (up to ~ 5 kg m⁻²), comparable to vegetated soils at lower elevation. Non-invasive geophysical methods revealed that these hidden soils were widespread on the plateau under the stony cover, with a mean thickness of around 50 cm. These TOC-rich soils, without vegetation and covered by periglacial landforms, represent a unique pedoenvironment suggesting new perspectives on the actual C-stocks at high-elevation sites, which are probably underestimated.
    Keywords alpine grasslands ; carbon dioxide ; catenas ; climate ; climate change ; forests ; geophysics ; landforms ; shrubs ; total organic carbon ; Alps region ; Italy
    Language English
    Dates of publication 2021-03
    Publishing place Elsevier B.V.
    Document type Article
    Note NAL-AP-2-clean
    ZDB-ID 519608-5
    ISSN 1872-6887 ; 0008-7769 ; 0341-8162
    ISSN (online) 1872-6887 ; 0008-7769
    ISSN 0341-8162
    DOI 10.1016/j.catena.2020.105044
    Database NAL-Catalogue (AGRICOLA)

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