Results 41 to 50 of about 398,926 (227)

Partial Coherence Estimation via Spectral Matrix Shrinkage under Quadratic Loss [PDF]

open access: yes, 2015
Partial coherence is an important quantity derived from spectral or precision matrices and is used in seismology, meteorology, oceanography, neuroscience and elsewhere.
Schneider-Luftman, D., Walden, A. T.
core   +2 more sources

Singularities of Partially Polarized Vortex Beams

open access: yesFrontiers in Physics, 2020
Singularities in the polarization state of non-uniform electromagnetic beams have been a topic of both theoretical and practical interest for many years, as have singularities in the correlation functions of random scalar wavefields.
William Scott Raburn, Greg Gbur
doaj   +1 more source

Interference fringes with maximal contrast at finite coherence time [PDF]

open access: yes, 2002
Interference fringes can result from the measurement of four-time fourth-order correlation functions of a wave field. These fringes have a statistical origin and, as a consequence, they show the greatest contrast when the coherence time of the field is ...
A. Papoulis   +7 more
core   +2 more sources

Electrophysiological Correlates of Morphological Neuroplasticity in Human Callosal Dysgenesis. [PDF]

open access: yesPLoS ONE, 2016
In search for the functional counterpart of the alternative Probst and sigmoid bundles, considered as morphological evidence of neuroplasticity in callosal dysgenesis, electroencephalographic (EEG) coherence analysis was combined with high resolution and
Vladimir V Lazarev   +5 more
doaj   +1 more source

The Relationship between Perceived Social Support and Social in College Students: The Mediation of Sense of Coherence [PDF]

open access: yesSHS Web of Conferences, 2021
This study aims to explore the relationship between the basic characteristics of college students’ social anxiety and the perceived social support and sense of coherence, and further explore the mediating role of the sense of coherence between perceived ...
Jiang Jiao, Luo Danna
doaj   +1 more source

Partial wavelet coherence as a robust method for assessment of neurovascular coupling in neonates with hypoxic ischemic encephalopathy

open access: yesScientific Reports, 2023
In neonates with hypoxic ischemic encephalopathy, the computation of wavelet coherence between electroencephalogram (EEG) power and regional cerebral oxygen saturation (rSO2) is a promising method for the assessment of neurovascular coupling (NVC), which
Tim Hermans   +6 more
doaj   +1 more source

Isolated effective coherence (iCoh): causal information flow excluding indirect paths [PDF]

open access: yes, 2014
A problem of great interest in real world systems, where multiple time series measurements are available, is the estimation of the intra-system causal relations.
Biscay, RJ   +7 more
core   +1 more source

Coherence methods in mapping AVO anomalies and predicting P-wave and S-wave impedances [PDF]

open access: yes, 2005
Filters for migrated offset substacks are designed by partial coherence analysis to predict ‘normal’ amplitude variation with offset (AVO) in an anomaly free area.
Barnola, A.S., White, Roy E.
core   +1 more source

Addressing indirect frequency coupling via partial generalized coherence

open access: yesScientific Reports, 2021
Distinguishing between direct and indirect frequency coupling is an important aspect of functional connectivity analyses because this distinction can determine if two brain regions are directly connected.
Joseph Young   +2 more
doaj   +1 more source

Motional narrowing, ballistic transport, and trapping of room-temperature exciton polaritons in an atomically-thin semiconductor

open access: yesNature Communications, 2021
Room-temperature exciton polaritons in a monolayer WS2 are shown to display strong motional narrowing of the linewidth and enhanced first-order coherence.
M. Wurdack   +9 more
doaj   +1 more source

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