Results 91 to 100 of about 505,548 (331)
Journal of Combinatorial Theory, Series B, 1990 A colouring of the vertices of a graph is said to be locally perfect if for each vertex x the neighbourhood N(x) of x is coloured by a number of colours which is equal to the cardinality of a maximum clique in N(x). The locally perfect graphs are those graphs for which any subgraph has a locally perfect colouring. It is shown in this paper that locally
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Modulating Oxide‐Based Quantum Materials by Ion Implantation
Advanced Functional Materials, EarlyView.This review highlights how ion implantation, a well developed chip‐technology, enables targeted modulation of oxide‐based quantum materials. This includes tuning of metal‐insulator transitions, magnetism, and superconductivity through selective doping, defect creation, and induced lattice strain. Abstract Ion implantation has emerged as a powerful tool
Andreas Herklotz +2 more
wiley +1 more source
Generalized Matching Preclusion in Bipartite Graphs
Theory and Applications of Graphs, 2018 The matching preclusion number of a graph with an even number of vertices is the minimum number of edges whose deletion results in a graph that has no perfect matchings. For many interconnection networks, the optimal such sets are precisely sets of edges
Zachary Wheeler +4 more
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On the perfect graph conjecture
Discrete Mathematics, 1976 We prove the following theorem: If every, odd cycle of length ≥5 has at least two chords, then the graph is perfect. This generalizes a result of Gallai and Suranyi and also a result of Olaru and Sachs.
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Laser‐Induced Graphene from Waste Almond Shells
Advanced Functional Materials, EarlyView.Almond shells, an abundant agricultural by‐product, are repurposed to create a fully bioderived almond shell/chitosan composite (ASC) degradable in soil. ASC is converted into laser‐induced graphene (LIG) by laser scribing and proposed as a substrate for transient electronics.
Yulia Steksova +9 more
wiley +1 more source
Journal of Combinatorial Theory, Series B, 1996 AbstractThe class ofβ-perfect graphs is introduced. We draw a number of parallels between these graphs and perfect graphs. We also introduce some special classes ofβ-perfect graphs. Finally, we show that the greedy algorithm can be used to colour a graphGwith no even chordless cycles using at most 2(χ(G)−1) colours.
G.S. Gasparian +2 more
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Double Helical Plasmonic Antennas
Advanced Functional Materials, EarlyView.Plasmonic double helical antennas funnel circularly polarized light to the nanoscale, offering strong chiroptical interaction and directional light emission. Extending a single helix design tool, this study combines numerical modeling with experimental validation, revealing large, broadband dissymmetry factors in the visible range.
Aleksei Tsarapkin +7 more
wiley +1 more source
Discrete Mathematics, 1995 Let \(G\) be a graph. A set \(X\) of vertices of \(G\) is said to be a dominating set of vertices of \(G\) if \(V(G)\) is contained in the closed neighbourhood of \(X\). The smallest cardinality of a dominating set of vertices in \(G\) is called the domination number of \(G\) and is denoted by \(\gamma(G)\). Let \(X\) be a set of vertices of \(G\).
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Substrate Stress Relaxation Regulates Cell‐Mediated Assembly of Extracellular Matrix
Advanced Functional Materials, EarlyView.Silicone‐based viscoelastic substrates with tunable stress relaxation reveal how matrix mechanics regulates cellular mechanosensing and cell‐mediated matrix remodelling in the stiff regime. High stress relaxation promotes assembly of fibronectin fibril‐like structures, increased nuclear localization of YAP and formation of β1 integrin‐enriched ...
Jonah L. Voigt +2 more
wiley +1 more source
Recycling of Thermoplastics with Machine Learning: A Review
Advanced Functional Materials, EarlyView.This review shows how machine learning is revolutionizing mechanical, chemical, and biological pathways, overcoming traditional challenges and optimizing sorting, efficiency, and quality. It provides a detailed analysis of effective feature engineering strategies and establishes a forward‐looking research agenda for a truly circular thermoplastic ...
Rodrigo Q. Albuquerque +5 more
wiley +1 more source