Results 81 to 90 of about 173,686,371 (130)

Neurochemical-hemodynamic-electrophysiological coupling in the neonatal brain: a multimodal MRS-fMRI-EEG investigation

Frontiers in Neuroscience
IntroductionInhibitory and excitatory neurotransmitter levels are linked to fast neuronal oscillations and infra-slow hemodynamic fluctuations, suggesting a shared excitation–inhibition (E/I) regulatory framework across measures.
Juliette L. Y. Champaud, Juliette L. Y. Champaud, Alice R. Thomson, Alice R. Thomson, Alice R. Thomson, Jucha Willers Moore, Ines Tomazinho, Ines Tomazinho, Kathleen Colford, Vyacheslav R. Karolis, Parvaneh Adibpour, Nicolaas A. Puts, Nicolaas A. Puts, Lorenzo Fabrizi, Tomoki Arichi, Tomoki Arichi, Tomoki Arichi   +16 more
doaj   +1 more source

New strategies for low noise, agile PLL frequency synthesis [PDF]

, 2009
Phase-Locked Loop based frequency synthesis is an essential technique employed in wireless communication systems for local oscillator generation.
Wang, H.
core  

Low-frequency fluctuations in semiconductor ring lasers with optical feedback

, 2015
In this paper, we experimentally and numerically study the dynamics of semiconductor ring lasers that are subjected to long delay and moderate self-feedback.
Van der Sande, Guy, Nguimdo, Romain Modeste, Mashal, L., Soriano, Miguel C.   +3 more
core   +1 more source

Frequency-dependent amplitude alterations of resting-state spontaneous fluctuations in idiopathic generalized epilepsy

, 2014
Purpose: Amplitude of low-frequency fluctuation (ALFF) of blood-oxygenation level-dependent (BOLD) has proven a promising way to detect disease-related local brain activity.
Liao, Wei, Xu, Qiang, Jiao, Qing, Lu, Guangming, Zhang, Zhiqiang, Feng, Jianfeng, Wang, Zhengge, Zhang, Jie, Lu, Wenlian, Chen, Guanghui   +9 more
core   +1 more source

Spontaneous Brain Activities in Hyperthyroidism Patients Assessed Using Fractional Amplitude of Low-frequency Fluctuation

Zhongguo quanke yixue, 2022
Background Hyperthyroidism is a common endocrine psychosomatic disease, which is often accompanied by negative emotions, seriously affecting the prognosis of patients. Moreover, it is associated with more than 5 times more higher risk of committing suicide.
openaire   +1 more source

The correlation between brain structure, function, and cognitive changes in patients with active-stage ulcerative colitis

Frontiers in Neuroscience
BackgroundPatients with active ulcerative colitis (UC) frequently exhibit emotional disturbances and cognitive deficits. However, the neurobiological basis of these manifestations remains poorly understood.
Weijie Fan, Wei Li, Wei Li, Si Zhang, Haiyu Zhang, Haiyu Zhang, Baobao Huang, Xia Xie, Li Wen, Dong Zhang   +9 more
doaj   +1 more source

Narrow-band analysis of nonstationary processes. [PDF]

The behavior of averaged periodograms and cross-periodograms of a broad class of nonstationary processes is studied. The processes include nonstationary ones that are fractional of any order, as well as asymptotically stationary fractional ones.
Marinucci, D., Robinson, Peter M.
core  

Triboelectric nanogenerator to harness energy from low-frequency and low-amplitude vibrating sources

Dielectric Elastomer Generator (DEG) stands out as a promising electromechanical device to harness energy from non-conventional sources owing to its ability to convert mechanical energy into electrical power. DEG with no rotating part demonstrates a high
Om Prakash Prabhakar, Dhananjay Sahu, Prabhakar, Om Prakash, Sahu, Raj Kumar, Sahu, Dhananjay, RAJ KUMAR SAHU   +5 more
core   +2 more sources

Current reusing low power fast settling multi-standard CMOS fractional-N frequency synthesizer

, 2011
A low power fast settling multi-standard CMOS fractional-N frequency synthesizer is proposed. The current reusing and frequency presetting techniques are adopted to realize the low power fast settling multi-standard fractional-N frequency synthesizer. An
Lou, W., Lou, Wenfeng, Wu, Nanjian, Feng, Peng   +3 more
core  

Connections relevant for low frequency oscillations.

, 2016
The matrix elements show the sensitivity of the peak amplitude of low frequency fluctuations on the individual connections. Same display as in Fig 5C.
Hannah Bos (3220512), Markus Diesmann (221260), Moritz Helias (306448)   +2 more
core   +1 more source