Results 11 to 20 of about 1,487,566 (296)

Rainbow Connection Number and Connectivity [PDF]

open access: yesThe Electronic Journal of Combinatorics, 2012
The rainbow connection number, $rc(G)$, of a connected graph $G$ is the minimum number of colors needed to color its edges, so that every pair of vertices is connected by at least one path in which no two edges are colored the same. Our main result is that $rc(G)\leq \lceil\frac{n}{2}\rceil$ for any 2-connected graph with at least three vertices.
Xueliang Li 0001   +4 more
openaire   +3 more sources

Connection, Connection, Connection… [PDF]

open access: yesScience, 2013
[Read the Introduction to this Special Section][1] ![Figure][2] CREDIT: VAN J. WEDEEN, AAPO NUMMENMAA, RUOPENG WANG, AND LAWRENCE L. WALD/MARTINOS CENTER FOR BIOMEDICAL IMAGING, MASSACHUSETTS GENERAL HOSPITAL There are approximately 86 billion neurons in the human brain.
openaire   +1 more source

Functional connectivity changes and their relationship with clinical disability and white matter integrity in patients with relapsing-remitting multiple sclerosis [PDF]

open access: yes, 2015
Background and objective: To define the pathological substrate underlying disability in multiple sclerosis by evaluating the relationship of resting-state functional connectivity with microstructural brain damage, as assessed by diffusion tensor maging ...
Filippini, N   +8 more
core   +1 more source

On the role of the corpus callosum in interhemispheric functional connectivity in humans [PDF]

open access: yes, 2017
Resting state functional connectivity is defined in terms of temporal correlations between physiologic signals, most commonly studied using functional magnetic resonance imaging. Major features of functional connectivity correspond to structural (axonal)
Hacker, Carl D.   +8 more
core   +2 more sources

Connected and connectivity multifunctions [PDF]

open access: yesProceedings of the American Mathematical Society, 1977
Conditions are given under which multifunctions which preserve connected sets will have a connected graph.
openaire   +2 more sources

Dynamic BOLD functional connectivity in humans and its electrophysiological correlates [PDF]

open access: yes, 2012
Neural oscillations subserve many human perceptual and cognitive operations. Accordingly, brain functional connectivity is not static in time, but fluctuates dynamically following the synchronization and desynchronization of neural populations.
Brodbeck, Verena   +4 more
core   +2 more sources

Validate your white matter tractography algorithms with a reappraised ISMRM 2015 Tractography Challenge scoring system

open access: yesScientific Reports, 2023
Since 2015, research groups have sought to produce the ne plus ultra of tractography algorithms using the ISMRM 2015 Tractography Challenge as evaluation. In particular, since 2017, machine learning has made its entrance into the tractography world.
Emmanuelle Renauld   +4 more
doaj   +1 more source

The Theory of Connections: Connecting Points [PDF]

open access: yesMathematics, 2017
This study introduces a procedure to obtain all interpolating functions, y = f ( x ) , subject to linear constraints on the function and its derivatives defined at specified values. The paper first shows how to express these interpolating functions passing through a single point in three distinct ways: linear, additive, and rational. Then, using
openaire   +4 more sources

Versatile mobile communications simulation: the Vienna 5G Link Level Simulator

open access: yesEURASIP Journal on Wireless Communications and Networking, 2018
Research and development of mobile communications systems require a detailed analysis and evaluation of novel technologies to further enhance spectral efficiency, connectivity and reliability.
Stefan Pratschner   +7 more
doaj   +1 more source

Early affective changes and increased connectivity in preclinical Alzheimer's disease. [PDF]

open access: yes, 2018
IntroductionAffective changes precede cognitive decline in mild Alzheimer's disease and may relate to increased connectivity in a "salience network" attuned to emotionally significant stimuli.
Bilgel, Murat   +7 more
core   +1 more source

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