An innovative geostatistical sediment trend analysis using geochemical data to highlight sediment sources and transport

Baux, Noémie; Murat, Anne; Poizot, Emmanuel; Méar, Yann; Gregoire, Gwendoline; Lesourd, Sandric; Dauvin, Jean–Claude

doi:10.1007/s10596-021-10123-5

Cited by 8 publications

(2 citation statements)

References 56 publications

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“…These PCNL-derived fragments were further broken-down ex vivo on a Dornier Delta ® III lithotripter to produce a wide array of smaller SWL-derived particles . Weight loss during SWL experimentation was determined (defined as [PCNL-derived fragment weight] − [total SWL-derived particle weight]) and size frequency distributions were measured from reflected light images of loose SWL-derived particles 46 , 47 . A subset of these SWL-derived particles was embedded in epoxy plugs and the polished surface analyzed using: (1) 250 nm-resolution microscopy (reflected light—RL; brightfield—BF; ring aperture contrast—RAC; phase contrast—PC; polarization—POL; transmitted light photomultiplier tube—T-PMT; confocal autofluorescence—CAF); and (2) 140 nm-resolution microscopy (T-PMT; super-resolution auto-fluorescence—SRAF).…”

Section: Introductionmentioning

confidence: 99%

GeoBioMed perspectives on kidney stone recurrence from the reactive surface area of SWL-derived particles

Todorov

Sivaguru

Krambeck

et al. 2022

Sci Rep

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Shock wave lithotripsy (SWL) is an effective and commonly applied clinical treatment for human kidney stones. Yet the success of SWL is counterbalanced by the risk of retained fragments causing recurrent stone formation, which may require retreatment. This study has applied GeoBioMed experimental and analytical approaches to determine the size frequency distribution, fracture patterns, and reactive surface area of SWL-derived particles within the context of their original crystal growth structure (crystalline architecture) as revealed by confocal autofluorescence (CAF) and super-resolution autofluorescence (SRAF) microscopy. Multiple calcium oxalate (CaOx) stones were removed from a Mayo Clinic patient using standard percutaneous nephrolithotomy (PCNL) and shock pulse lithotripsy (SPL). This produced approximately 4–12 mm-diameter PCNL-derived fragments that were experimentally treated ex vivo with SWL to form hundreds of smaller particles. Fractures propagated through the crystalline architecture of PCNL-derived fragments in a variety of geometric orientations to form rectangular, pointed, concentrically spalled, and irregular SWL-derived particles. Size frequency distributions ranged from fine silt (4–8 μm) to very fine pebbles (2–4 mm), according to the Wentworth grain size scale, with a mean size of fine sand (125–250 μm). Importantly, these SWL-derived particles are smaller than the 3–4 mm-diameter detection limit of clinical computed tomography (CT) techniques and can be retained on internal kidney membrane surfaces. This creates clinically undetectable crystallization seed points with extremely high reactive surface areas, which dramatically enhance the multiple events of crystallization and dissolution (diagenetic phase transitions) that may lead to the high rates of CaOx kidney stone recurrence after SWL treatment.

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Section: Introductionmentioning

confidence: 99%

GeoBioMed perspectives on kidney stone recurrence from the reactive surface area of SWL-derived particles

Todorov

Sivaguru

Krambeck

et al. 2022

Sci Rep

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“…Coastline matching is very important in various scientific disciplines that study coastal evolution at different time scales (in the present, in history and in geology) [18]. By implementing this work, we provide a highly accurate solution in coastline matching aiming to contribute to the study of • erosional processes in the coastal environment [19] • sedimentary budget of the coasts because of the coastal behaviour and mobility [20] • seafloor spreading, coastal uplift and subsidence related to internal geodynamics Another contribution is that the proposed methodology provides features for the study of the coastline evolution.…”

Section: Introductionmentioning

confidence: 99%

Coastline matching via a graph-based approach

et al. 2022

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This paper studies the problem of unsupervised detection of geometrically similar fragments (segments) in curves, in the context of boundary matching. The goal is to determine all pairs of sub-curves that are geometrically similar, under local scale invariance. In particular, we aim to locate the existence of a similar section (independent of length and/or orientation) in the second curve, to a section of the first curve, as indicated by the user. The proposed approach is based on a suitable distance matrix of the two given curves. Additionally, a suitable objective function is proposed to capture the trade-off between the similarity of the common sub-sequences and their lengths. The goal of the algorithm is to minimize this objective function via an efficient graph-based approach that capitalizes on Dynamic Time Warping to compare the two subcurves. We apply the proposed technique in the context of geometric matching of coastline pairs. This application is crucial for investigating the forcing factors related to the coastline evolution. The proposed method was successfully applied to global coastline data, yielding a bipartite graph with analytical point-to-point correspondences.

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Ecotoxicology and geostatistical techniques employed in subtropical reservoirs sediments after decades of copper sulfate application

Biamont-Rojas

Cardoso-Silva

Bitencourt

et al. 2022

Environ Geochem Health

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An innovative geostatistical sediment trend analysis using geochemical data to highlight sediment sources and transport

Cited by 8 publications

References 56 publications

GeoBioMed perspectives on kidney stone recurrence from the reactive surface area of SWL-derived particles

GeoBioMed perspectives on kidney stone recurrence from the reactive surface area of SWL-derived particles

Coastline matching via a graph-based approach

Ecotoxicology and geostatistical techniques employed in subtropical reservoirs sediments after decades of copper sulfate application

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