Results 51 to 60 of about 173,686,371 (130)

Turbo-coded star-QAM for cooperative wireless and optical-fiber communications [PDF]

, 2012
A low-complexity cooperative wireless and optical-fiber communication scheme is proposed for uplink communication in a Fractional Frequency Reuse (FFR) based multicell, multiuser system.
Liang, Dandan, Dandan Liang, Xinyi Xu, Soon Xin Ng, Xu, Xinyi, Ng, Soon Xin, Hanzo, Lajos, Lajos Hanzo   +7 more
core   +2 more sources

Low-complexity LSMR equalisation of FrFT-based multicarrier systems in doubly dispersive channels [PDF]

, 2011
The discrete fractional Fourier transform (FrFT) has been suggested to enhance performance over DFT-based multicarrier systems when transmitting over doubly-dispersive channels.
Weiss, Stephan, Stephan Weiss, Soraghan, John, Solyman, Ahmed A. A., Solyman, Ahmed, Soraghan, John J., John J. Soraghan, Ahmed A. A. Solyman   +7 more
core   +1 more source

Characterization of Thalamo-cortical Association Using Amplitude and Connectivity of Functional MRI in Mild Traumatic Brain Injury

, 2014
PurposeTo examine thalamic and cortical injuries using fractional amplitude of low-frequency fluctuations (fALFFs) and functional connectivity MRI (fcMRI) based on resting state (RS) and task-related fMRI in patients with mild traumatic brain injury ...
Zuo, Xi-Nian, Zhou, Yongxia, Milham, Michael P., Reaume, Joseph, Ge, Yulin, Grossman, Robert I., Lui, Yvonne W.   +6 more
core   +1 more source

A multi-site resting state fMRI study on the amplitude of low frequency fluctuations in schizophrenia [PDF]

, 2013
Background: This multi-site study compares resting state fMRI amplitude of low frequency fluctuations (ALFF) and fractional ALFF (fALFF) between patients with schizophrenia (SZ) and healthy controls (HC). Methods: Eyes-closed resting fMRI scans (5:38 min;
Mueller, Bryon A., Ford, Judith M, McEwin, Sarah, Erp, Theo G. M. van, Bustillo, Juan, Calhoun, Vince D., Mathalon, Daniel H., FBIRN, Potkin, Steven G., Mueller, Bryon A, Belger, Aysenil, Voyvodic, James, Mathalon, Daniel H, McEwen, Sarah, Potkin, Steven G, van Erp, Theo GM, Turner, Jessica, Turner, Jessica A, Damaraju, Eswar, Ford, Judith, Calhoun, Vince D, Theo G.M. Van Erp, Bryon A. Mueller, Juan eBustillo, Eswar eDamaraju, Judith M Ford, Steven G. Potkin, Jessica A Turner, Daniel H Mathalon, James eVoyvodic, Aysenil eBelger, Sarah Christine McEwen, Functional Imaging eBIRN, Vince D Calhoun   +33 more
core   +2 more sources

Impact of visual repetition rate on intrinsic properties of low frequency fluctuations in the visual network. [PDF]

, 2011
BACKGROUND: Visual processing network is one of the functional networks which have been reliably identified to consistently exist in human resting brains. In our work, we focused on this network and investigated the intrinsic properties of low frequency (
Chien-Chung Chen, Li, Yi-Chia; Chen, Chien-Chung; Chen, Jyh-Horng; Valdes-Sosa, Pedro Antonio, Li Yi-Chia, Chen Chien-Chung, Jyh-Horng Chen, Chen Jyh-Horng, Yi-Chia Li   +6 more
core   +1 more source

Abnormal white matter functional-structural coupling in noise-induced hearing loss: A multimodal study combining static and dynamic ALFF with white matter FA

NeuroImage
Objective: To investigate abnormal coupling patterns between white matter functional activation (static and dynamic amplitude of low‑frequency fluctuations, sALFF and dALFF) and white matter (WM) microstructural integrity (fractional anisotropy, FA) in ...
Ranran Huang, Wenwen Liu, Ke Bi, Aijie Wang, Liping Wang, Minghui Lv, Xianghua Bao, Guowei Zhang   +7 more
doaj   +1 more source

Altered Spontaneous Brain Activity Patterns of Meibomian Gland Dysfunction in Severely Obese Population Measured Using the Fractional Amplitude of Low-Frequency Fluctuations

Frontiers in Psychiatry, 2022
ObjectiveUtilizing the fractional amplitude of low-frequency fluctuations (fALFF) technique, this study sought to correlate spontaneous cerebral abnormalities with the clinical manifestations of meibomian gland dysfunction (MGD) in severely obese (SO ...
Yu-Ling Xu, Xiao-Yu Wang, Jun Chen, Min Kang, Yi-Xin Wang, Li-Juan Zhang, Hui-Ye Shu, Xu-Lin Liao, Jie Zou, Hong Wei, Qian Ling, Yi Shao   +11 more
doaj   +1 more source

Frequency-Specific Alternations in the Amplitude of Low-Frequency Fluctuations in Schizophrenia

, 2017
Schizophrenia has been associated with abnormal task-related brain activation in sensory and motor regions as well as social cognition network. Recently, two studies investigated temporal correlation between resting-state functional magnetic resonance ...
曾文毅;謝明憲;黃宗正;簡意玲;劉智民;劉震鐘;胡海國, Yu, Rongjun;Chien, Yi-Ling;Wang, Hsiao-Lan Sharon;Liu, Chih-Min;Liu, Chen-Chung;Hwang, Tzung-Jeng;Hsieh, Ming H.;Hwu, Hai-Gwo;Tseng, Wen-Yih Isaac   +1 more
core   +1 more source

The role of the fronto-parietal network in modulating sustained attention under sleep deprivation: an functional magnetic resonance imaging study

Frontiers in Psychiatry, 2023
ObjectiveThe intricate relationship between sleep deprivation (SD) and cognitive performance has long been a subject of research. Our study offers a novel angle by closely examining the neurobiological underpinnings of sustained attention deficits ...
Linming Yao, Yajing Wang, Yanzhong Gao, Hongwei Gao, Xufeng Guo   +4 more
doaj   +1 more source

Voxel-wise reliability of rs-fMRI and CBF measures.

, 2018
ALFF: amplitude of low frequency fluctuations, fALFF: fractional ALFF, CBF: cerebral blood flow, DC: degree centrality, EC: eigenvector centrality, ICC: intraclass correlation coefficient, ReHo: regional homogeneity, rs-fMRI: resting-state fMRI.
Cécile Luzy (5946155), Neena Sarkar (5946161), Juergen Dukart (283449), Fabio Sambataro (252881), Gérard Greig (5946158), Alessandro Bertolino (252850), Jan-Bernard C. Marsman (5097383), Štefan Holiga (121788), Remco J. Renken (512940), Scott A. Schobel (5946164)   +9 more
core   +1 more source