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285 results for “Computational analysis”
Figure 5. Muscle mass reconstruction method for M in A Computational Analysis of Limb and Body Dimensions in Tyrannosaurus rex with Implications for Locomotion, Ontogeny, and Growth
Figure 5. Muscle mass reconstruction method for M. caudofemoralis longus (see Methods); Carnegie specimen depicted. Dorsal and right lateral views are shown on topı and in the bottom row are caudal views of the right femur and then caudal vertebrae (8th and 17th). Red shaded volumes are the M. caudofemoralis longus reconstruction. Note a small space for M. caudofemoralis brevis (not reconstructed) is left around the ilium/sacrum and lateral to the CFL insertion. doi:10.1371/journal.pone.0026037.g005
Figure 2 in A Computational Analysis of Limb and Body Dimensions in Tyrannosaurus rex with Implications for Locomotion, Ontogeny, and Growth
Figure 2. Models: cranial view. From left to right for each specimen: 3D scan of skeleton (not shown for Jane due to copyright issues)ı minimal modelı and maximal model. Not to scale. doi:10.1371/journal.pone.0026037.g002
Figure 1 in A Computational Analysis of Limb and Body Dimensions in Tyrannosaurus rex with Implications for Locomotion, Ontogeny, and Growth
Figure 1. Modelling procedureı showing the Carnegie specimen. From left to rightı top to bottom these show the scannedı reconstructedı and straightened skeleton; the skeleton with elliptical hoops that define fleshy boundaries; the air spaces representing pharynxı sinusesı lungs and other airways including air sacs; and the final meshed reconstruction used for mass and COM estimates. doi:10.1371/journal.pone.0026037.g001
Effect of space diffuser on flow characteristics of a centrifugal pump by computational fluid dynamic analysis
<p><span>Achieving an optimal configuration of the diffuser is indispensable for high pump performances. In this work, a numerical study on diffuser configuration is conducted for a high pump performance using a computational fluid dynamics code, and the effects of the wrap angle and the relative position of the diffuser vane to the impeller on pump performances are included. The results indicate that the modified diffuser with a suitable wrap angle may improve the pump hydraulic efficiency and the head by approximately 4% and 8%, respectively, while a suitable position of the diffuser vane can enhance the pump head by more than 4%. Meanwhile, the pressure recovery coefficient and the local Euler head of the diffuser are adopted to evaluate the diffuser performance. For a high pump performance, the local Euler head of the diffuser has a peak value at the leading edge with the change rate of zero along the meridian streamline, meaning that no blade loading at the leading edge of the diffuser guarantees a better match between the impeller and the diffuser.</span></p>
Pitfalls of Computed Tomography 3D Reconstruction Models in Cranial Nonmetric Analysis
<p>Many studies in the literature have highlighted the utility of virtual 3D databanks as a substitute for real skeletal collections and the important application of radiological records in personal identification. However, none have investigated the accuracy of virtual material compared to skeletal remains in nonmetric variant analysis using 3D models. The present study investigates the accuracy of 20 computed tomography (CT) 3D reconstruction models compared to the real crania, focusing on the quality of the reproduction of the real crania and the possibility to detect 29 dental/cranial morphological variations in 3D images. An interobserver analysis was performed to evaluate trait identification, number, position, and shape. Results demonstrate a false bone loss in 3D models in some cranial regions, specifically the maxillary and occipital bones in 85% and 20% of the samples. Additional analyses revealed several difficulties in the detection of cranial nonmetric traits in 3D models, resulting in incorrect identification in circa 70% of the traits. In particular, pitfalls included the detection of erroneous position, error in presence/absence rates, in number, and in shape. The lowest percentages of correct evaluations were found in traits localized in the lateral side of the cranium and for the infraorbital suture, mastoid foramen, and crenulation. The present study highlights important pitfalls in CT scan when compared with the real crania for nonmetric analysis. This may have crucial consequences in cases where 3D databanks are used as a source of reference population data for nonmetric traits and pathologies and during bone-CT comparisons for identification purposes.</p>
FIGURE 95 in Osteology of Tyrannosaurus rex: insights from a nearly complete skeleton and high-resolution computed tomographic analysis of the skull
FIGURE 95. FMNH PR2081, Tyrannosaurus rex. Right femur in posterior (A), lateral (B), anterior (C), and medial (D) views. Left femur in posterior (E), lateral (F), anterior (G), and medial (H) views. I, right femur, proximal view. J, Right femur, distal view. Scale = 30 cm; abbreviations in Appendix 1. Photographs by J. Weinstein.
FIGURE 39 in Osteology of Tyrannosaurus rex: insights from a nearly complete skeleton and high-resolution computed tomographic analysis of the skull
FIGURE 39. FMNH PR2081, Tyrannosaurus rex. Horizontal CT slice through braincase, 1 cm ventral to floor of endocranial cavity. Note hollow nature of parasphenoid rostrum and complex of recesses within basioccipital. Abbreviations in Appendix 1.
FIGURE 15 in Osteology of Tyrannosaurus rex: insights from a nearly complete skeleton and high-resolution computed tomographic analysis of the skull
FIGURE 15. FMNH PR2081, Tyrannosaurus rex. Sutural relationships between nasal, lacrymal, and maxilla above the antorbital fenestra. Left lateral view. See Appendix 1 for abbreviations. Photographs by J. Weinstein.
FIGURE 96 in Osteology of Tyrannosaurus rex: insights from a nearly complete skeleton and high-resolution computed tomographic analysis of the skull
FIGURE 96. FMNH PR2081, Tyrannosaurus rex. Right tibia, calcaneum, and astragalus in medial (A), posterior (B), lateral (C), and anterior (D) views. Left tibia, calcaneum, and astragalus in anterior (E), lateral (F), posterior (G), and medial (H) views. I, left tibia, proximal view. J, left astragalus and calcaneum, distal view. Scale = 30 cm; abbreviations in Appendix 1. Photographs by J. Weinstein.
FIGURE 10 in Osteology of Tyrannosaurus rex: insights from a nearly complete skeleton and high-resolution computed tomographic analysis of the skull
FIGURE 10. FMNH PR2081, Tyrannosaurus rex. Closeup of right premaxilla, showing extensive premaxillary flooring of external naris. Anterior extent of nasal under the naris cannot be determined. See Appendix 1 for abbreviations.
FIGURE 43 in Osteology of Tyrannosaurus rex: insights from a nearly complete skeleton and high-resolution computed tomographic analysis of the skull
FIGURE 43. FMNH PR2081, Tyrannosaurus rex. Medial view of left mandible focusing on dorsal tip of intramandibular joint, where the splenial, prearticular, coronoid, and supradentary converge. Abbreviations in Appendix 1.
FIGURE 92 in Osteology of Tyrannosaurus rex: insights from a nearly complete skeleton and high-resolution computed tomographic analysis of the skull
FIGURE 92. FMNH PR2081, Tyrannosaurus rex. A, Left ilium, lateral view. B, Left ilium, medial view. C, Right ilium (with sacrum attached), lateral view. Scale = 30 cm; abbreviations in Appendix 1. Photographs by J. Weinstein.
FIGURE 93 in Osteology of Tyrannosaurus rex: insights from a nearly complete skeleton and high-resolution computed tomographic analysis of the skull
FIGURE 93. FMNH PR2081, Tyrannosaurus rex. Left ischium and proximal portion of left pubis in (A) medial and (B) lateral view. Right ischium and proximal portion of right pubis in (C) lateral and (D) medial view. Scale = 30 cm; abbreviations in Appendix 1. Photographs by J. Weinstein.
FIGURE 58 in Osteology of Tyrannosaurus rex: insights from a nearly complete skeleton and high-resolution computed tomographic analysis of the skull
FIGURE 58. FMNH PR2081, Tyrannosaurus rex. Caudal vertebrae, anterior view. Scale = 1 5 cm. Photographs by J. Weinstein.
FIGURE 66 in Osteology of Tyrannosaurus rex: insights from a nearly complete skeleton and high-resolution computed tomographic analysis of the skull
FIGURE 66. FMNH PR2081, Tyrannosaurus rex. Haemal arches, anterior view. Scale = 10 cm. Photographs by J. Weinstein.
FIGURE 4 in Osteology of Tyrannosaurus rex: insights from a nearly complete skeleton and high-resolution computed tomographic analysis of the skull
FIGURE 4. FMNH PR2081, Tyrannosaurus rex. Skull in ventral view (A, photograph; B, line interpretation of cranial sutures). Scale = 30 cm. See Appendix 1 for abbreviations. Photograph by J. Weinstein.
FIGURE 3 in Osteology of Tyrannosaurus rex: insights from a nearly complete skeleton and high-resolution computed tomographic analysis of the skull
FIGURE 3. FMNH PR2081, Tyrannosaurus rex. Skull in dorsal view (A, photograph; B, line interpretation of cranial sutures). Scale = 30 cm. See Appendix 1 for abbreviations.
FIGURE 59 in Osteology of Tyrannosaurus rex: insights from a nearly complete skeleton and high-resolution computed tomographic analysis of the skull
FIGURE 59. FMNH PR2081, Tyrannosaurus rex. Caudal vertebrae, posterior view. Scale = 15 cm. Photographs by J. Weinstein.
FIGURE 51 in Osteology of Tyrannosaurus rex: insights from a nearly complete skeleton and high-resolution computed tomographic analysis of the skull
FIGURE 51. FMNH PR2081, Tyrannosaurus rex. Cervical vertebrae (p2 through p9), right lateral view. A is axis. Scale = 15 cm. See Appendix 1 for abbreviations. Photographs by J. Weinstein.
FIGURE 54 in Osteology of Tyrannosaurus rex: insights from a nearly complete skeleton and high-resolution computed tomographic analysis of the skull
FIGURE 54. FMNH PR2081, Tyrannosaurus rex. Presacral vertebrae (p14 through p23), posterior view. Scale = 15 cm. See Appendix 1 for abbreviations. Photographs by J. Weinstein.
ScienceDex guides
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These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
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.