Results 21 to 30 of about 3,918 (223)

Asphericity of the Base of the Solar Convection Zone

open access: yesThe Astrophysical Journal
We have used solar oscillation frequencies and frequency splittings obtained over solar cycles 23 and 24 to investigate whether the base of the solar convection zone shows any departure from spherical symmetry.
Sarbani Basu, Sylvain G. Korzennik
doaj   +2 more sources

Relative vertex asphericity [PDF]

open access: yesCanadian Mathematical Bulletin, 2020
AbstractDiagrammatic reducibility DR and its generalization, vertex asphericity VA, are combinatorial tools developed for detecting asphericity of a 2-complex. Here we present tests for a relative version of VA that apply to pairs of 2-complexes $(L,K)$ , where K is a subcomplex of L.
Harlander, Jens, Rosebrock, Stephan
openaire   +2 more sources

Do normal radiographs exclude asphericity of the femoral head-neck junction? [PDF]

open access: yes, 2009
Asphericity of the femoral head-neck junction is one cause for femoroacetabular impingement of the hip. However, the asphericity often is underestimated on conventional radiographs.
Christoph Albers   +9 more
core   +3 more sources

The Effects of Chemical Bonding at Subatomic Resolution: A Case Study on α-Boron

open access: yesMolecules, 2021
Similar to classical asphericity shifts, aspherical deformations of the electron density in the atomic core region can result in core asphericity shifts in refinements using a Hansen-Coppens multipolar model (HCM), especially when highly precise ...
Andreas Fischer   +2 more
doaj   +1 more source

Comparison of six radiographic projections to assess femoral head/neck asphericity [PDF]

open access: yes, 2006
Early radiographic detection of femoroacetabular impingement might prevent initiation and progression of osteoarthritis. The structural abnormality in femoral-induced femoroacetabular impingement (cam type) is frequently asphericity at the anterosuperior
Meyer, Dominik C   +4 more
core   +2 more sources

Stress analysis of aspherical TRISO-coated particle with X-ray computed tomography

open access: yesNuclear Materials and Energy, 2023
The failure probability of TRISO-coated particle is directly dependent on the asphericity and the layer thickness. Local asphericity of the SiC layer will contribute to the concentrated stress region, increasing failure probability of the particle.
Libing Zhu   +2 more
doaj   +1 more source

Q-value customized versus wavefront-optimized ablation in femtosecond laser-assisted LASIK for myopia and myopic astigmatism: a prospective contralateral comparative study

open access: yesEye and Vision, 2022
Background Corneal refractive surgery for myopia results in an oblate shift with increased postoperative aberrations inversely affecting the quality of vision. Aspheric ablation profiles have been introduced to minimize such a problem.
Magdi Mohammad Mostafa   +4 more
doaj   +1 more source

Association of Chondrolabral Lesions with Ultrasound-Guided Detection of Pathological Head–Neck Contour

open access: yesDiagnostics, 2023
Objective: This study aimed to investigate whether the asphericity of the neck–head junction of the femur confirmed via ultrasound is associated with further pathology due to femoro-acetabular impingement (FAI).
Christian T. Schamberger   +5 more
doaj   +1 more source

Comparison of Higher-Order Aberrations After Single-Step Transepithelial and Conventional Alcohol-Assisted Photorefractive Keratectomy

open access: yesTürk Oftalmoloji Dergisi, 2020
Objectives:To compare the asphericity and higher-order aberration (HOA) outcomes of single-step transepithelial photorefractive keratectomy (tPRK) and conventional alcohol-assisted PRK (aaPRK) in patients with myopia and myopic astigmatism.Materials and ...
Kemal Özülken, Çağrı İlhan
doaj   +1 more source

Aspherical supernova explosions [PDF]

open access: yesSymposium - International Astronomical Union, 2003
Core collapse supernovae (SN) are the final stages of stellar evolution in massive stars during which the central region collapses, forms a neutron star (NS), and the outer layers are ejected. Recent explosion scenarios assumed that the ejection is due to energy deposition by neutrinos into the envelope, but detailed models do not produce powerful ...
Hoeflich, P.   +4 more
openaire   +2 more sources

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