نتایج جستجو برای: resonance structures

تعداد نتایج: 655446  

Journal: :Physical review 2022

Both spontaneous emission and resonant energy transfer can be enhanced significantly when the emitter is placed in vicinity of metallic or crystal structures. This enhancement described using electromagnetic Green tensor determined by dominant surface modes structure. Here we use eigenpermittivity formalism to derive F\"orster-resonance (FRET) rates quasistatic regime a two-constituent medium w...

Journal: :Journal of High Energy Physics 2021

We study kink-antikink collisions in a model which interpolates smoothly between the completely integrable sine-Gordon theory, $\phi^4$ model, and $\phi^6$-like with three degenerate vacua. find rich variety of behaviours, including integrability breaking, resonance windows increasingly irregular patterns, new types near regime. False vacua, extra kink modes fragmentation play important roles e...

Journal: :Journal of medical imaging 2014
April Khademi Anastasios Venetsanopoulos Alan R Moody

An artifact found in magnetic resonance images (MRI) called partial volume averaging (PVA) has received much attention since accurate segmentation of cerebral anatomy and pathology is impeded by this artifact. Traditional neurological segmentation techniques rely on Gaussian mixture models to handle noise and PVA, or high-dimensional feature sets that exploit redundancy in multispectral dataset...

Journal: :Magnetic resonance in medicine 2003
Smita Sampath J Andrew Derbyshire Ergin Atalar Nael F Osman Jerry L Prince

The harmonic phase (HARP) method provides automatic and rapid analysis of tagged magnetic resonance (MR) images for quantification and visualization of myocardial strain. In this article, the development and implementation of a pulse sequence that acquires HARP images in real time are described. In this pulse sequence, a CINE sequence of images with 1-1 spatial modulation of magnetization (SPAM...

Patients with limbic encephalitis usually present with new onset mesial temporal lobe seizures, progressive memory disturbance, and a variety of other behavioral, emotional, and cognitive changes. Autoimmune inflammation of the limbic gray matter structures of the human brain has recently been identified as major cause of mesial temporal lobe epilepsy with interictal temporal epileptiform activ...

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