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7 results for “Convex Hull”
Experimental 3D convex hull tiling of a wild moss specimen ( Rhytidiadelphus or Eurhynchium ?) embedded in 1% agarose
<p>Experimental 3D convex hull tiling of a wild moss specimen ( Rhytidiadelphus or Eurhynchium ?) embedded in 1% agarose</p> <p>Raw data consists of 18 tiles of varying number of Z stacks, depending on where the 3D convex hull points were determined.</p> <p>Images acquired on a Zeiss Lightsheet Z1 using a W Plan-Apochromat 20x/1.0 UV-VIS objective simultaneous dual camera acquisition of autofluorescence under 488nm and 561nm excitation.</p> <p>Original voxel sizes are (x,y,z) = (0.326, 0.326, 2.0) microns</p> <p>Data provided here are tiles fused using BigStitcher, downsampled to the following voxel sizes</p> <p>- Moss_Fused_Downsampled.tif: (4, 4, 24) microns<br> - Moss_Fused_Downsampled_Anisotropy_2.tif: (12, 12, 24) microns</p> <p>Sample acquisition, sample preparation, imaging and stitching performed by Olivier Burri, at the Ecole Polytechnique Fédérale de Lausanne BioImaging and Optics Platform (EPFL - SV - PTECH - PTBIOP)</p>
FIGURE 5. Panthera atrox reconstruction showing differences between simple convex hulls and more complex reconstructions. 1 in Reconstruction of the musculoskeletal system in an extinct lion
FIGURE 5. Panthera atrox reconstruction showing differences between simple convex hulls and more complex reconstructions. 1, Reconstructed muscles overlaid on the convex hull of just the bones. Any muscles that are visible extend beyond the range of the convex hull, thereby demonstrating the underestimation of size by convex hulls based solely on bones. 2, Reconstructions showing the posteroventral movement of the centre of mass (COM) between the bone convex hull and the muscled convex hull models of Panthera atrox. Scale bar is 50 cm.
A Convex Hull Formulation for the Design of Optimal Mixtures
<p>The files contain some of the formulations implemented in GAMS for this publication. All problems are solved in GAMS version 24.2.3 and are run on a single core of a dual 6 core Intel Xeon X5675 machine at 3.07 GHz.</p> <p>Supplementary files can be found at: <em>https://zenodo.org/record/35234</em></p>
Decoratype-based materials informatics: Polaritype identification, convex hull DFT calculations, training data, and predicted compounds data
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Convex hull estimation of mammalian body segment parameters
<p><span>Obtaining accurate values for body segment parameters (BSPs) is fundamental in many biomechanical studies, particularly for gait analysis. Convex hulling, where the smallest-possible convex object that surrounds a set of points is calculated, has been suggested as an effective and time-efficient method to estimate these parameters in extinct animals, where soft tissues are rarely preserved. We investigated the effectiveness of convex hull BSP estimation in a range of extant mammals, to inform the potential future usage of this technique with extinct taxa. Computed tomography scans of both the skeleton and skin of every species investigated were virtually segmented. BSPs (the mass, position of the centre of mass and inertial tensors of each segment) were calculated from the resultant soft tissue segments, while the bone segments were used as the basis for convex hull reconstructions. We performed phylogenetic generalised least squares and ordinary least squares regressions to compare the BSPs calculated from soft tissue segments with those estimated using convex hulls, finding consistent predictive relationships for each body segment. The resultant regression equations can therefore be used with confidence in future volumetric reconstruction and biomechanical analyses of mammals, in both extinct and extant species where such data may not be available.</span></p>
Convex hull estimation of mammalian body segment parameters
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Data from: LobeFinder: a convex hull-based method for quantitative boundary analyses of lobed plant cells
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