The Experts below are selected from a list of 315 Experts worldwide ranked by ideXlab platform
W. Jerry Oakes - One of the best experts on this subject based on the ideXlab platform.
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Quantitative anatomy of the transverse ligament Tubercles.
Journal of Neurosurgery: Spine, 2002Co-Authors: R. Shane Tubbs, John C. Wellons, Jason T. Banks, Jeffrey P. Blount, W. Jerry OakesAbstract:Object. The medial Tubercles of the atlas serve as the attachments of the transverse ligament and provide an important anchoring site for which no discussion of their fine anatomy is published in the literature. In this study the authors examine this anatomy along with its osseous relationships. Methods. One hundred dry cadaveric atlantal Tubercles were assessed for size and relationship to nearby anatomical osseous structures. In addition, eight cadaveric specimens were evaluated for their anatomy in this area. All specimens exhibited atlantal Tubercles for the attachment of the transverse portion of the cruciate ligament of the atlas. Right-sided Tubercles tended to be of a larger caliber. Overall, right-sided vertical distances between these Tubercles and the superior articular facets and inferior articular facets were greater, although distances from each Tubercle to the lateral margin of the dental facets anteriorly were found to be constant, as were intertubercular distances. The mean angle formed b...
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Quantitative anatomy of the transverse ligament Tubercles.
Journal of neurosurgery, 2002Co-Authors: R. Shane Tubbs, John C. Wellons, Jeffrey P. Blount, Jason Banks, W. Jerry OakesAbstract:The medial Tubercles of the atlas serve as the attachments of the transverse ligament and provide an important anchoring site for which no discussion of their fine anatomy is published in the literature. In this study the authors examine this anatomy along with its osseous relationships. One hundred dry cadaveric atlantal Tubercles were assessed for size and relationship to nearby anatomical osseous structures. In addition, eight cadaveric specimens were evaluated for their anatomy in this area. All specimens exhibited atlantal Tubercles for the attachment of the transverse portion of the cruciate ligament of the atlas. Right-sided Tubercles tended to be of a larger caliber. Overall, right-sided vertical distances between these Tubercles and the superior articular facets and inferior articular facets were greater, although distances from each Tubercle to the lateral margin of the dental facets anteriorly were found to be constant, as were intertubercular distances. The mean angle formed between both Tubercles and the dental facet was 75 degrees. The data derived in this study should be useful to the clinician for whom the craniocervical junction is a vital anatomical area.
Carl J Jones - One of the best experts on this subject based on the ideXlab platform.
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description of the egg of ochlerotatus japonicus japonicus diptera culicidae using variable pressure scanning electron microscopy
Journal of Medical Entomology, 2009Co-Authors: Andrew D Haddow, John K Moulton, Reid R Gerhardt, Linda J Mccuiston, Carl J JonesAbstract:ABSTRACT The egg of Ochlerotatus japonicus japonicus (Theobald) is described with the aid of variable pressure scanning electron micrographs. The egg is black, cigar shaped, and tapers ventrally. The length is ≈591 µm and the width is ≈172 µm. The outer chorionic cells are irregular in shape, either hexagonal or pentagonal, and decrease in size toward the anterior and posterior poles. Ventral Tubercles typically range from three to six and contact the chorionic reticulum. Dorsal Tubercles contain two large Tubercles with small oval-shaped Tubercles grouped around them. A large thread-shaped Tubercle extends from this grouping either as a single Tubercle or as a series of connected Tubercles. The micropylar collar is low and discontinuous and is seldom complete. This description will aid researchers in the identification of this invasive vector species.
R. Shane Tubbs - One of the best experts on this subject based on the ideXlab platform.
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Quantitative anatomy of the transverse ligament Tubercles.
Journal of Neurosurgery: Spine, 2002Co-Authors: R. Shane Tubbs, John C. Wellons, Jason T. Banks, Jeffrey P. Blount, W. Jerry OakesAbstract:Object. The medial Tubercles of the atlas serve as the attachments of the transverse ligament and provide an important anchoring site for which no discussion of their fine anatomy is published in the literature. In this study the authors examine this anatomy along with its osseous relationships. Methods. One hundred dry cadaveric atlantal Tubercles were assessed for size and relationship to nearby anatomical osseous structures. In addition, eight cadaveric specimens were evaluated for their anatomy in this area. All specimens exhibited atlantal Tubercles for the attachment of the transverse portion of the cruciate ligament of the atlas. Right-sided Tubercles tended to be of a larger caliber. Overall, right-sided vertical distances between these Tubercles and the superior articular facets and inferior articular facets were greater, although distances from each Tubercle to the lateral margin of the dental facets anteriorly were found to be constant, as were intertubercular distances. The mean angle formed b...
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Quantitative anatomy of the transverse ligament Tubercles.
Journal of neurosurgery, 2002Co-Authors: R. Shane Tubbs, John C. Wellons, Jeffrey P. Blount, Jason Banks, W. Jerry OakesAbstract:The medial Tubercles of the atlas serve as the attachments of the transverse ligament and provide an important anchoring site for which no discussion of their fine anatomy is published in the literature. In this study the authors examine this anatomy along with its osseous relationships. One hundred dry cadaveric atlantal Tubercles were assessed for size and relationship to nearby anatomical osseous structures. In addition, eight cadaveric specimens were evaluated for their anatomy in this area. All specimens exhibited atlantal Tubercles for the attachment of the transverse portion of the cruciate ligament of the atlas. Right-sided Tubercles tended to be of a larger caliber. Overall, right-sided vertical distances between these Tubercles and the superior articular facets and inferior articular facets were greater, although distances from each Tubercle to the lateral margin of the dental facets anteriorly were found to be constant, as were intertubercular distances. The mean angle formed between both Tubercles and the dental facet was 75 degrees. The data derived in this study should be useful to the clinician for whom the craniocervical junction is a vital anatomical area.
Kamarul Arifin Ahmad - One of the best experts on this subject based on the ideXlab platform.
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cfd study on naca 4415 airfoil implementing spherical and sinusoidal Tubercle leading edge
PLOS ONE, 2017Co-Authors: Syed Mohammed Aminuddin Aftab, Kamarul Arifin AhmadAbstract:The Humpback whale Tubercles have been studied for more than a decade. Tubercle Leading Edge (TLE) effectively reduces the separation bubble size and helps in delaying stall. They are very effective in case of low Reynolds number flows. The current Computational Fluid Dynamics (CFD) study is on NACA 4415 airfoil, at a Reynolds number 120,000. Two TLE shapes are tested on NACA 4415 airfoil. The Tubercle designs implemented on the airfoil are sinusoidal and spherical. A parametric study is also carried out considering three amplitudes (0.025c, 0.05c and 0.075c), the wavelength (0.25c) is fixed. Structured mesh is utilized to generate grid and Transition SST turbulence model is used to capture the flow physics. Results clearly show spherical Tubercles outperform sinusoidal Tubercles. Furthermore experimental study considering spherical TLE is carried out at Reynolds number 200,000. The experimental results show that spherical TLE improve performance compared to clean airfoil.
Serkan Turkmen - One of the best experts on this subject based on the ideXlab platform.
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numerical optimization and experimental validation for a tidal turbine blade with leading edge Tubercles
Renewable Energy, 2016Co-Authors: Weichao Shi, Mehmet Atlar, Rosemary Norman, Batuhan Aktas, Serkan TurkmenAbstract:Recently the leading-edge Tubercles on the pectoral fins of humpback whales have attracted the attention of researchers who wish to exploit this feature in the design of turbine blades to improve the blade performance. The main objective of this paper is therefore to make a further investigation into this biomimetic design inspiration through a fundamental research study involving a hydrofoil section, which represents a straightened tidal turbine blade, with and without the leading-edge Tubercles, using computational and experimental methods. Firstly a computational study was conducted to optimise the design of the leading-edge Tubercles by using commercial CFD code, ANSYS-CFX. Based on this study the optimum Tubercle configuration for a tidal turbine blade with S814 foil cross-section was obtained and investigated further. A 3D hydrofoil model, which represented a "straightened" tidal turbine blade, was manufactured and tested in the Emerson Cavitation Tunnel of Newcastle University to investigate the effect of various Tubercle options on the lift and drag characteristics of the hydrofoil. The experiments involved taking force measurements using a 3-component balance device and flow visualisation using a Particle Image Velocimetry (PIV) system. These tests revealed that the leading-edge Tubercles may have significant benefits on the hydrodynamic performance of the hydrofoil in terms of an improved lift-to-drag ratio performance as well as reducing the tip vortex which is main cause of the undesirable end-effect of 3D foils. The study explores further potential benefits of the application of leading-edge Tubercles on tidal turbine blades.
