Results 11 to 20 of about 1,953,891 (241)
Migraine with aura is associated with an incomplete circle of willis: results of a prospective observational study. [PDF]
PLoS ONE, 2013 To compare the prevalence of an incomplete circle of Willis in patients with migraine with aura, migraine without aura, and control subjects, and correlate circle of Willis variations with alterations in cerebral perfusion.Migraine with aura, migraine ...
Brett Cucchiara +7 more
doaj +1 more source
Circle detection using electro-magnetism optimization [PDF]
Information Sciences, 2012 This paper describes a circle detection method based on Electromagnetism-Like Optimization (EMO). Circle detection has received considerable attention over the last years thanks to its relevance for many computer vision tasks. EMO is a heuristic method for solving complex optimization problems inspired in electromagnetism principles.
Erik Cuevas +4 more
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Core Loss Analysis and Modeling of a Magnetic Coupling System in WPT for EVs
World Electric Vehicle Journal, 2021 The magnetic core is an important part of the magnetic coupling system in wireless power transmission (WPT) for EVs. It helps to increase the coupling coefficient and reduce magnetic field leakage. However, it also brings additional core loss.
Qingbin Chen +3 more
doaj +1 more source
Non-resonant circles for strong magnetic fields on surfaces
Annales Henri Lebesgue, 2022 We study non-resonant circles for strong magnetic fields on a closed, connected, oriented surface and show how these can be used to prove the existence of trapping regions and of periodic magnetic geodesics with prescribed low speed. As a corollary, there exist infinitely many periodic magnetic geodesics for every low speed in the following cases: i ...
ASSELLE L., BENEDETTI G.
openaire +3 more sources
Semiclassical tunneling and magnetic flux effects on the circle [PDF]
Journal of Spectral Theory, 2017 This paper is devoted to semiclassical tunneling estimates induced on the circle by a double well electric potential in the case when a magnetic field is added. When the two electric wells are connected by two geodesics for the Agmon distance, we highlight an oscillating factor (related to the circulation of the magnetic field) in the splitting ...
Bonnaillie-Noël, Virginie +2 more
openaire +4 more sources
Rolling Circle Amplification on a Bead: Improving the Detection Time for a Magnetic Bioassay
ACS Omega, 2023 Detection of pathogens has become increasingly important, especially in the face of outbreaks and epidemics all over the world. Nucleic acid detection techniques provide a solid base to detect and identify pathogens. In recent years, magnetic sensors and magnetic labels have become of more interest due to their simplicity of use, low cost, and ...
Sánchez Martín, Darío +2 more
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Intrinsic circle domains [PDF]
, 2014 Using quasiconformal mappings, we prove that any Riemann surface of finite connectivity and finite genus is conformally equivalent to an intrinsic circle domain U in a compact Riemann surface S. This means that each connected component B of S\U is either
Crane, Edward T
core +1 more source
DEMAND, a Dimensional Extreme Magnetic Neutron Diffractometer at the High Flux Isotope Reactor
Crystals, 2018 A two-dimensional (2D) Anger camera detector has been used at the HB-3A four-circle single-crystal neutron diffractometer at the High Flux Isotope Reactor (HFIR) since 2013.
Huibo Cao +10 more
doaj +1 more source
Journal of Associated Medical Sciences, 2023 Background: A stroke or cerebrovascular accident is associated with defects in the circle of Willis. The present research assessed whether differences in the anatomy of the circle of Willis were implicated in subjects affected by stroke.
Samson Omini Paulinus +7 more
doaj +1 more source
Magnetic resonance imaging of flow dynamics in the circle of Willis. [PDF]
Stroke, 1990 Magnetic resonance angiography was applied to the study of blood flow dynamics in the circle of Willis in nine patients with cerebrovascular disease and two normal volunteers. In conjunction with two-dimensional or three-dimensional gradient-echo acquisitions, selective presaturation of individual vessels was used to determine the direction of blood ...
R R, Edelman +5 more
openaire +2 more sources