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30 results for “Mesh reconstruction”
Processing of 3-D Polygon Mesh Model and Radio Propagation Simulations in a Cave: Surface Reconstruction from Point Cloud, Simplification of the Mesh, and Ray Tracing
<p><strong>ABOUT</strong></p><p>This repository includes mesh data from cave geometry scanning and processing, and radio propagation data from ray tracing simulations.</p><p>The geometry data is obtained with laser scanning in a cave in Slovenija. </p><p>The geometry processing includes (i) 3-D shape reconstruction - surface reconstruction from point cloud data and (ii) simplification - reduction of the geometric complexity of the 3-D mesh model. </p><p>The radio propagation data is obtained using CloudRT [1] ray-tracing simulator. </p><p>The obtained propagation-related quantities include information about the propagation mechanism, interactions with the geometry, received power, delay, azimuth and elevation angles of arrival and departure, and path loss. </p><p> </p><p><strong>AUTHORS</strong></p><p>Teodora Kocevska, Andrej Hrovat, Tomaž Javornik</p><p>Department of Communication Systems</p><p>Jožef Stefan Institute, SI-1000 Ljubljana, Slovenia</p><p>teodora.kocevska@ijs.si</p><p> </p><p><strong>GEOMETRY PROCESSING</strong></p><p>The cave segment used for the propagation calculations is selected from a point cloud obtained in a cave in Litia, Slovenia. The point cloud is obtained with 3-D laser scanning of the environment. The selected segment is approx. 58 m long. Several parameter configurations were considered for 3-D shape reconstruction, including Poisson surface reconstruction with octree depths of 8, 10, and 12. Geometries that represent the cave shape and have different levels of complexity were created and studied. In the simplification process, one and two-stage simplification was explored using the Quadric Edge Collapse Decimation approach. </p><p> </p><p><strong>RADIO SETUP</strong></p><p>The transmitter (Tx) is fixed at the entrance of the cave and the receiver (Rx) is moved along the cave in 40 positions with a step of 1 m.</p><p>Omnidirectional antennas at the Tx and Rx sites and vertical polarization are considered. The antenna is mounted 1.5 m above the ground.</p><p>The start frequency is 3.5 GHz, the end frequency is 3.6 GHz and the step is 10 MHz. Direct propagation and first-order reflection are considered. </p><p>The cave geometry is represented by a triangular mesh, and the material of the cave is wet earth. The material electromagnetic properties are selected according to the specifications presented in [2].</p><p> </p><p><strong>FOLDER STRUCTURE</strong></p><p>The folder structure is:</p><p> - Polygon_Mesh_Models</p><p> <i># 3-D environment models with varying </i>levels<i> of geometry complexity</i></p><p> - Reconstruction_Segmen1_Poisson_Surface_Reconstruction</p><p> - Simplification_Segment1_Quadric_Edge_Collapse_Decimation</p><p> - Propagation_Data</p><p> <i># Propagation quantities of all rays between a transmitter and receiver</i></p><p> - AllRay_PropData</p><p> - PathLoss</p><p> - readme.txt</p><p> - RayTracing_EnvironmentModel</p><p> <i> # Final environment model used for ray tracing simulations</i></p><p> - Cave_MeshModel.json</p><p> - Cave_MeshModel.skb</p><p> - Cave_MeshModel.skp</p><p> - RayTracing_MaterialProperties</p><p> <i># Properties of the materials in the environment</i></p><p> - materials.json</p><p> - materials.mtl</p><p> - readme.txt</p><p> - Cave_Length.txt</p><p> <i># Length between selected locations in the environment</i></p><p> - Cave_Segment1_visual.png</p><p> <i> # Visualization of the environment segment used for propagation calculation</i></p><p> - readme.txt</p><p> <i># Overall description </i></p><p><strong>REFERENCES</strong></p><p>[1] D. He, B. Ai, K. Guan, L. Wang, Z. Zhong, and T. Kürner, "The Design and Applications of High-Performance Ray-Tracing Simulation Platform for 5G and Beyond Wireless Communications: A Tutorial," in IEEE Communications Surveys & Tutorials, vol. 21, no. 1, pp. 10-27, First quarter 2019, doi: 10.1109/COMST.2018.2865724.</p><p>[2] R. sector of International Telecommunication Union (ITU-R), "Effects of building materials and structures on radio wave propagation above about 100 MHz," International Telecommunication Union, ITU-R Recommendation P.2040-2, 2021.</p><p> </p><p><strong>ACKNOWLEDGEMENT</strong></p><p>This work was supported by the Slovenian Research Agency under grant <strong>J2-3048</strong>.</p><p> </p>
The supplemental data for the paper: "Methodology of generation of CFD meshes and 4D shape reconstruction of coronary arteries from patient-specific dynamic CT"
<p>The supplemental data for the paper: "Methodology of generation of CFD meshes and 4D shape reconstruction of coronary arteries from patient-specific dynamic CT"</p><p>A video file (minimum play resolution is HD to see the mesh) showing the movement of the LCA throughout the heart cycle and .STL files for 10--100% (increment of 10\%) of the heart cycle phase.</p>
Estimation of curvature from volume fractions using parabolic reconstruction on two-dimensional unstructured meshes (Supporting data)
<p>This data accompanies the paper "Estimation of curvature from volume fractions using parabolic reconstruction on two-dimensional unstructured meshes", published in Journal of Computational Physics (2017). The document "supportingdata.pdf" gives a description of the data provided in the txt-files.</p>
RECELL® System Combined With Meshed Autograft for Reduction of Donor Skin Harvesting in Soft Tissue Reconstruction
ClinicalTrials.gov study NCT04091672. IPD Sharing: Not stated. Countries: 1. Publications: 1.
The dataset of "Deep Learning-enabled 3D Multimodal Fusion of Cone-Beam CT and Intraoral Mesh Scans for Clinically Applicable Tooth-bone Reconstruction"
<p>The dataset used in the study "Deep Learning-enabled 3D Multimodal Fusion of Cone-Beam CT and Intraoral Mesh Scans for Clinically Applicable Tooth-bone Reconstruction" is available upon request. Please contact the authors of the study or the responsible institution for access to the dataset.</p>
Male Sexual Experience and Its Impact on Quality of Life Before and After Their Sexual Partners Undergo Polypropylene Mesh Augmented Pelvic Floor Reconstruction
ClinicalTrials.gov study NCT01320631. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Use of a Low Profile Titanium Mesh in Orbital Reconstruction
ClinicalTrials.gov study NCT01432964. IPD Sharing: Not stated. Countries: 1. Publications: 6.
Restore-B: A Trial Comparing Prepectoral Implant-based Breast Reconstruction With and Without Mesh
ClinicalTrials.gov study NCT06112977. IPD Sharing: YES. Countries: 1. Publications: 1.
Performance of Biologic Mesh Materials in Abdominal Wall Reconstruction
ClinicalTrials.gov study NCT02703662. IPD Sharing: NO. Countries: 1. Publications: 13.
Reconstruction of Orbital Floor Blow-out Fractures by Titanium Mesh Versus Autogenous Iliac Graft
ClinicalTrials.gov study NCT07340879. IPD Sharing: UNDECIDED. Countries: 1. Publications: 3.
The Accuracy of Reconstruction of Orbital Walls Fracture Using Prebent Mesh Versus Patient Specific Implant
ClinicalTrials.gov study NCT06294535. IPD Sharing: Not stated. Countries: 1. Publications: 0.
A Comparison Between Biological (Veritas®) vs Non Biological Mesh (TIGR®) in Immediate Breast Reconstruction
ClinicalTrials.gov study NCT02985073. IPD Sharing: NO. Countries: 1. Publications: 4.
Phrenoesophageal Ligament Reconstruction With Mesh
ClinicalTrials.gov study NCT07251010. IPD Sharing: UNDECIDED. Countries: 1. Publications: 4.
Abdominal Wall Reconstruction With PVDF Mesh in the Setting of Active Infection
ClinicalTrials.gov study NCT05061264. IPD Sharing: YES. Countries: 1. Publications: 7.
Collagen Implant (Biological Mesh) Versus GM Flap for Reconstruction of Pelvic Floor After ELAPE in Rectal Cancer
ClinicalTrials.gov study NCT01347697. IPD Sharing: Not stated. Countries: 2. Publications: 3.
Anterior Pelvic Prolapse Reconstruction With TiLOOP® PRO A Polypropylene Mesh
ClinicalTrials.gov study NCT02690220. IPD Sharing: NO. Countries: 1. Publications: 1.
Bioprosthetic Mesh to Expand the Lower Pole in Tissue Expander Reconstruction
ClinicalTrials.gov study NCT01310075. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Randomized Feasibility Trial for Mesh in Pre-Pectoral Reconstruction
ClinicalTrials.gov study NCT05190978. IPD Sharing: NO. Countries: 1. Publications: 0.
Reconstructed neuron meshes from the Ciona connectome
<p>This file contains the reconstructed <em>Ciona</em> neuron meshes from the Ciona connectome. (<a href="https://doi.org/10.7554/eLife.16962">Ryan 2016</a>) The meshes are packaged to load in Unity 2021.3.</p>
Titanium Mesh Coated With Natural Hydroxyapatite Nanocrystals in Orbital Reconstruction
ClinicalTrials.gov study NCT05437731. IPD Sharing: Not stated. Countries: 1. Publications: 0.
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International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.