Results 121 to 130 of about 18,582 (315)

Irreducible No-Hole L(2, 1)-Coloring of Edge-Multiplicity-Paths-Replacement Graph

open access: yesDiscussiones Mathematicae Graph Theory, 2018
An L(2, 1)-coloring (or labeling) of a simple connected graph G is a mapping f : V (G) → Z+ ∪ {0} such that |f(u)−f(v)| ≥ 2 for all edges uv of G, and |f(u) − f(v)| ≥ 1 if u and v are at distance two in G.
Mandal Nibedita, Panigrahi Pratima
doaj   +1 more source

Refinement of amino‐acid conformation vs. difference density maps in time‐resolved serial femtosecond crystallography data analysis

open access: yesFEBS Open Bio, EarlyView.
The dFoCC pipeline starts with observed DED and resting‐state coordinates, which are then used to generate a library of triggered states. Correlation analysis of the calculated DED features of each candidate vs observed DED permits quantitative evaluation of candidate structural quality.
Meng Iao Fong   +3 more
wiley   +1 more source

Graph Coloring Manifolds

open access: yes, 2006
We introduce a new and rich class of graph coloring manifolds via the Hom complex construction of Lovász. The class comprises examples of Stiefel manifolds, series of spheres and products of spheres, cubical surfaces, as well as examples of Seifert ...
Csorba, P.   +3 more
core   +2 more sources

Brain Tumor Segmentation Using Graph Coloring Approach in Magnetic Resonance Images. [PDF]

open access: yesJ Med Signals Sens, 2021
Bagheri R   +2 more
europepmc   +1 more source

Evaluating the involvement of autolysosomes in the nuclear translocation of fluorescent proteins

open access: yesFEBS Open Bio, EarlyView.
Endogenously expressed fluorescent proteins can be degraded by autophagy and transported to cell nuclei via the nuclear pore complex. But in some cell lines, for example, HeLa cells which are positive for immunoreactivity of a receptor ligand, such as UCN I, in cell nuclei, fusion of autolysosome with the nuclear envelope is involved in the nuclear ...
Keiichi Ikeda
wiley   +1 more source

Baseline Regional Cholinergic Denervation Predicts Cognitive Trajectories in Moderate Parkinson Disease

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Cognitive decline is a disabling and variable feature of Parkinson disease (PD). While cholinergic system degeneration is linked to cognitive impairments in PD, most prior research reported cross‐sectional associations. We aimed to fill this gap by investigating whether baseline regional cerebral vesicular acetylcholine transporter ...
Taylor Brown   +6 more
wiley   +1 more source

A Note on Graph Colorings and Graph Polynomials

open access: yesJournal of Combinatorial Theory, Series B, 1997
Given a graph \(G\), form a polynomial \(\prod (x_i-x_j)\) where the product is over all edges \((i,j)\) with \(i < j\). If \(G\) is not \(k\)-colourable, then no matter how the variables \(x_i\) are assigned integers from \(1\) to \(k\) the polynomial is zero. Hence the graph polynomial encodes chromatic properties of the graph.
Noga Alon, Michael Tarsi
openaire   +2 more sources

Innate Immune Reprogramming Mediated by Endogenous Retroelement Dysregulation Drives Multiple Sclerosis Progression

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
Epigenetic reprogramming in hematopoietic stem and progenitor cells (HSPCs) and downstream myeloid cells, mediated by H3.3 downregulation and endogenous retroelement (ERE) overexpression, contributes to the progression of multiple sclerosis (MS). ABSTRACT Background Skewed myelopoiesis in the bone marrow has been identified as a key driver of multiple ...
Li‐Mei Xiao   +6 more
wiley   +1 more source

T-colorings of graphs

open access: yesDiscrete Mathematics, 1992
Given a finite set \(T\) of natural numbers containing 0, a \(T\)-coloring of a simple graph \(G=(V(G),E(G))\) is a function \(f\) from the vertex set \(V(G)\) to natural numbers such that \(| f(u)-f(v)|\notin T\) whenever \(\{u,v\}\in E(G)\). The span of a \(T\)-coloring is defined to be the difference between the largest and smallest color used. The \
openaire   +1 more source

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