Results 51 to 60 of about 374,279 (311)
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective To delineate specific in vivo white matter pathology in neuronal intranuclear inclusion disease (NIID) using diffusion spectrum imaging (DSI) and define its clinical relevance. Methods DSI was performed on 42 NIID patients and 38 matched controls.
Kaiyan Jiang +10 more
wiley +1 more source
Field Theory Expansions of String Theory Amplitudes
Physical Review LettersMotivated by quantum field theory (QFT) considerations, we present new representations of the Euler-Beta function and tree-level string theory amplitudes using a new two-channel, local, crossing symmetric dispersion relation. Unlike standard series representations, the new ones are analytic everywhere except at the poles, sum over poles in all channels,
Arnab Priya Saha, Aninda Sinha
openaire +4 more sources
Amplitude prescriptions in field theories with complex poles
Journal of High Energy PhysicsIn the context of field theories with complex poles, we scrutinize four inequivalent ways of defining the scattering amplitudes, each forfeiting one or more tenets of standard quantum field theory while preserving the others: (i) a textbook Wick rotation
Damiano Anselmi +3 more
doaj +1 more source
Novel string field theory with also negative energy constituents/objects gives Veneziano amplitude
Journal of High Energy Physics, 2018 We have proposed a new type of string field theory. The main point of the present article is to cure some technical troubles: missing two out three terms in Veneziano amplitude. Our novel string field theory, describes a theory with many strings in terms
H.B. Nielsen, M. Ninomiya
doaj +1 more source
Advanced Engineering Materials, EarlyView.A numerical–experimental framework is developed for characterizing multi‐matrix fiber‐reinforced polymers (MM‐FRPs) combining epoxy and polyurethane matrices. Harmonic bending tests are integrated with finite element model updating (FEMU) to simultaneously identify elastic and viscoelastic material parameters.
Rodrigo M. Dartora +4 more
wiley +1 more source
, 2015 The structure and stability of mode-2 internal solitary-like waves is investigated experimentally. A rank-ordered train of mode-2 internal solitary waves is generated using a lock release configuration.
P. A. Davies +11 more
core +1 more source
Breakthrough in field amplitude of high-temperature superconductors staggered-array undulators
Physical Review ResearchThe fundamental wavelength of undulator radiation and free-electron lasers depends on the period and magnetic field strength of the undulator. Shortening the undulator period and increasing the magnetic field strength are essential for achieving higher ...
Ryota Kinjo, Satoshi Sato, Marco Calvi
doaj +1 more source
Noise Propagation in Multiple-Input ADC-Based Measurement Systems
Measurement Science Review, 2014 In this paper, the complete statistical characterization of the amplitude spectrum at the output of a multiple-input ADC-based measurement system is derived under the assumption of input channels with different noise levels. In practical applications the
Bellan Diego
doaj +1 more source
Advanced Engineering Materials, EarlyView.Thermomechanical fatigue tests of laser beam powder bed fusion (PBF‐LB) Inconel 718 show that the additively manufactured material reaches almost the lifetimes of conventionally‐rolled material under no‐dwell conditions. Introducing dwell times at the maximum temperature markedly reduces the lifetimes due to pronounced grain boundary sliding associated
Stefan Guth +6 more
wiley +1 more source
Modulation techniques for data superposition on amplitude-modulated signals [PDF]
, 1983 Double-sideband amplitude-modulation is widely used because of its simplicity in transmission and reception, but in a number of applications the inclusion of a data channel has become an additional requirement.
Al-Jalili, Yazan Othman Ahmad
core