Results 91 to 100 of about 10,769 (289)
Colourings of (k-r,k)-trees [PDF]
Opuscula Mathematica, 2017 Trees are generalized to a special kind of higher dimensional complexes known as \((j,k)\)-trees ([L. W. Beineke, R. E. Pippert, On the structure of \((m,n)\)-trees, Proc. 8th S-E Conf. Combinatorics, Graph Theory and Computing, 1977, 75-80]), and which
M. Borowiecki, H. P. Patil
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Lead‐Free Chiral Hybrid Metal Halides for Circularly Polarized Light‐Emitting Diodes
Advanced Optical Materials, EarlyView.Lead‐free chiral hybrid metal halides provide a versatile platform for realizing chiroptical responses through chiral modulation of metal–halide frameworks with diverse dimensionalities, induces inversion‐symmetry breaking and enables dissymmetric excited‐state transitions toward efficient circularly polarized luminescence and electroluminescence. This
Kun Zhu, Li Wan
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Automorphic chromatic index of generalized Petersen graphs [PDF]
, 2009 The automorphic A-chromatic index of agraph G is the minimum integer m for which G has aproper edge-coloring with m colors which is preserved by a givensubgroup A of the full automorphism group of G.
RUINI, Beatrice +3 more
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On Twin Edge Colorings of Graphs
Discussiones Mathematicae Graph Theory, 2014 A twin edge k-coloring of a graph G is a proper edge coloring of G with the elements of Zk so that the induced vertex coloring in which the color of a vertex v in G is the sum (in Zk) of the colors of the edges incident with v is a proper vertex coloring.
Andrews Eric +4 more
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The skew chromatic index of a graph
Discrete Mathematics, 1984 A skew edge colouring of a graph G is a pair of edge colourings of G such that no two edges are assigned the same unordered pair of colours. The skew chromatic index s(G) is the minimum number of colours required for a skew edge colouring of G. It is shown that s(G) is at most \(0(G)+4\). Better bounds are obtained when G is cyclic, cubic or bipartite.
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TacScope: A Miniaturized Vision‐Based Tactile Sensor for Surgical Applications
Advanced Robotics Research, EarlyView.TacScope is a compact, vision‐based tactile sensor designed for robot‐assisted surgery. By leveraging a curved elastomer surface with pressure‐sensitive particle redistribution, it captures high‐resolution 3D tactile feedback. TacScope enables accurate tumor detection and shape classification beneath soft tissue phantoms, offering a scalable, low‐cost ...
Md Rakibul Islam Prince +3 more
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Advanced Science, EarlyView.A multimodal intravital imaging platform enables longitudinal tracking of human cortical organoids transplanted into chronic stroke lesions. By combining surgical microscopy, MRI, bioluminescence imaging, and two‐photon fluorescence microscopy, the platform captures graft placement, viability dynamics, and cellular‐scale morphology in vivo, offering a ...
Jinghui Wang +12 more
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Chromatic aberrations of radial gradient-index lenses. I. Theory [PDF]
, 1996 Chromatic effects of radial gradient-index materials have been analyzed, and several important conclusions have been derived in terms of material dispersion data.
Sharma, Anurag, Siva Rama Krishna, K.
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A Bound on the Strong Chromatic Index of a Graph
Journal of Combinatorial Theory, Series B, 1997 The strong chromatic index \(s\chi'(G)\) of a graph \(G\) is the minimum number of colors in a proper edge coloring of a graph in which no edge is adjacent to an edge of the same color. It is proved that \(s\chi'(G)\leq 1.998\Delta^2\), where \(\Delta\) is the maximum degree of a vertex of \(G\). This answers a question of Erdös and Nešetřil, which was
Molloy, M., Reed, B.
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Advanced Science, EarlyView.A continuous conductivity gradient is formed in a porous MXene/melamine foam via directional evaporation, thereby improving impedance matching and enhancing electromagnetic attenuation. The resulting monolithic composite delivers absorption‐dominant EMI shielding with ultralow reflection, offering a simple route toward lightweight EMI shielding ...
Dawei Zhang +6 more
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