Results 31 to 40 of about 1,038,640 (224)

Alterations of brain gray matter volume in children with obstructive sleep apnea

open access: yesFrontiers in Neurology, 2023
ObjectiveObstructive sleep apnea (OSA) seriously affects the children's cognitive functions, but the neuroimaging mechanism of cognitive impairment is still unclear. The purpose of our study was to explore the difference in brain local gray matter volume
Chenyi Yu   +14 more
doaj   +1 more source

Gray Relational Analysis Optimization for Coalbed Methane Blocks in Complex Conditions Based on a Best Worst and Entropy Method

open access: yesApplied Sciences, 2019
The uncertainty and complexity of the geological parameters of coalbed methane (CBM) reservoirs may result in the assignment of atypical exact values to a whole block.
Guofei Zhao   +4 more
doaj   +1 more source

Relationship between hippocampal structure and memory function in elderly humans [PDF]

open access: yes, 2006
With progressing age, the ability to recollect personal events declines, whereas familiarity-based memory remains relatively intact. It has been hypothesized that age-related hippocampal atrophy may contribute to this pattern because of its critical role
A. Szentkuti   +8 more
core   +1 more source

Status evaluation of relay protector based on an improved fuzzy-gray method

open access: yesGong-kuang zidonghua, 2016
For unclear and inaccurate performance of status evaluation of relay protector, an improved fuzzy-gray method was proposed for the status evaluation problem.
MA Chunyan, GONG Ying
doaj   +1 more source

Use of the First Derivative of Spectral Reflectance to Detect Mold on Tomatoes [PDF]

open access: yes, 1982
The first derivative of spectral reflectance of tomatoes was studied to see whether it can detect molds and sunscald damage on the fruit. The results indicate that a quality index based on the derivative values of reflectance at 590- and 710-nm ...
Chen, Pictiaw, Ruiz-Altisent, Margarita
core   +2 more sources

Structural damage identification based on gray cloud rule generator algorithm

open access: yesAdvances in Mechanical Engineering, 2019
It is difficult for the traditional methods to identify uncertain damage problems caused by noise. Therefore, a gray cloud rule generator algorithm based on cloud model and modal strain energy is presented to solve the problems.
Hui-Yong Guo, He-Fa Yuan, Qi Huang
doaj   +1 more source

The causal link between cardiometabolic risk factors and gray matter atrophy: An exploratory study

open access: yesHeliyon, 2023
Although gray matter atrophy is commonly observed with aging, it is highly variable, even among healthy people of the same age. This raises the question of what other factors may contribute to gray matter atrophy. Previous studies have reported that risk
Vibujithan Vigneshwaran   +2 more
doaj   +1 more source

Dynamical system analysis of ignition phenomena using the tangential stretching rate concept [PDF]

open access: yes, 2015
We analyze ignition phenomena by resorting to the stretching rate concept formerly introduced in the study of dynamical systems. We construct a Tangential Stretching Rate (TSR) parameter by combining the concepts of stretching rate with the decomposition
Ciottoli, Pietro Paolo   +4 more
core   +1 more source

Detailing neuroanatomical development in late childhood and early adolescence using NODDI. [PDF]

open access: yesPLoS ONE, 2017
Diffusion tensor imaging (DTI) studies have provided much evidence of white and subcortical gray matter changes during late childhood and early adolescence that suggest increasing myelination, axon density, and/or fiber coherence.
Alyssa Mah   +2 more
doaj   +1 more source

On the Gray index of phantom maps

open access: yesTopology, 2005
A phantom map from a CW complex \(X\) to a space \(Y\) is a map such that the restrictions to the skeleta \(X_n\) are all null-homotopic. A phantom map \(f\) has finite Gray index if there exists \(n\) such that every extension of \(f\) over the cone on \(X_{n+1}\) is a phantom map. For \(X\) and \(Y\) of finite type, it has been conjectured that every
openaire   +5 more sources

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