Results 141 to 150 of about 3,569,422 (339)
The Diagnostic Value of Visual Evoked Potentials in Chronic Disorders of Consciousness
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective In chronic disorders of consciousness (DOCs), the distinction between vegetative state/unresponsive wakefulness syndrome (VS/UWS) and minimally conscious state (MCS) is as crucial as it is challenging. Evoked potentials (EPs) and event‐related potentials (ERPs) are helpful, but some limitations prevent their consistent use in the ...
Letizia Clementi +14 more
wiley +1 more source
Group field theories for all loop quantum gravity
New Journal of Physics, 2015 Group field theories represent a second quantized reformulation of the loop quantum gravity state space and a completion of the spin foam formalism. States of the canonical theory, in the traditional continuum setting, have support on graphs of arbitrary
Daniele Oriti +2 more
doaj +1 more source
The intersection of Brownian paths as a case study of a renormalization group method for quantum field theory [PDF]
, 1985 Michael Aizenman
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Relational Observables in Group Field Theory
Classical and Quantum GravityAbstract We construct relational observables in group field theory (GFT) in terms of covariant positive operator-valued measures (POVMs), using techniques developed in the context of quantum reference frames. We focus on matter quantum reference frames; generalizations to other types of frames within the same POVM-based framework are ...
Luca Marchetti, Edward Wilson-Ewing
openaire +2 more sources
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective The cervical spinal cord (cSC) is highly relevant to clinical dysfunction in multiple sclerosis (MS) but remains understudied using quantitative magnetic resonance imaging (MRI). We assessed magnetization transfer ratio (MTR), a semi‐quantitative MRI measure sensitive to MS‐related tissue microstructural changes, in the cSC and its ...
Lisa Eunyoung Lee +26 more
wiley +1 more source
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective Spinocerebellar ataxias (SCAs) are a group of genetically heterogeneous neurodegenerative diseases causing progressive deterioration and reduced quality of life. Therapeutic advances have been limited by a lack of sensitive anatomic, functional, or diffusion imaging‐based biomarkers.
David J. Arpin +11 more
wiley +1 more source
Quantum Groups, Quantum Categories and Quantum Field Theory [PDF]
, 1993 Jürg Fröhlich, Thomas Kerler
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Reconstructing the metric in group field theory
Classical and Quantum GravityAbstract We study a group field theory (GFT) for quantum gravity coupled to four massless scalar fields, using these matter fields to define a (relational) coordinate system. We exploit symmetries of the GFT action, in particular under shifts in the values of the scalar fields, to derive a set of classically conserved currents, and show ...
Steffen Gielen, Lisa Mickel
openaire +2 more sources
Timing and Predictive Value of Clinical Conditions Preceding Multiple Sclerosis in the UK Biobank
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objectives Multiple sclerosis (MS) patients often experience a higher incidence of clinical conditions before diagnosis, suggesting a prodromal phase. However, their predictive value and temporal trajectories remain underexplored. We investigated these aspects using the large UK Biobank's population‐based cohort, which provided clinical ...
Andrea Nova +5 more
wiley +1 more source
INFINITE QUANTUM GROUP SYMMETRY OF FIELDS IN MASSIVE 2D QUANTUM FIELD THEORY [PDF]
, 1992 André LeClair, F. Smirnov
openalex +1 more source