Results 71 to 80 of about 1,143 (224)

Optimized Antimony‐Doped Tin Oxide Thin Films With Enhanced Electrical Properties for Low‐Emissivity Architectural Coatings

Advanced Science, EarlyView.
Antimony‐doped tin oxide (ATO) thin films were deposited by aerosol‐assisted chemical vapor deposition (AACVD) and systematically investigated to establish correlations between Sb doping level, structural properties and optoelectronic performance. Optimized films exhibited low sheet resistance, high carrier concentrations, and high visible transparency
Iqra Ramzan, Ivan P. Parkin, Claire J. Carmalt   +2 more
wiley   +1 more source

List packing number of bounded degree graphs [PDF]

We investigate the list packing number of a graph, the least k such that there are always k disjoint proper list-colourings whenever we have lists all of size k associated to the vertices.
Davies, E., Kang, R.J., Cambie, S., Cames van Batenburg, W.   +3 more
core   +1 more source

Packing Chromatic Number of Circular Fans and Mesh of Trees

International Journal of Mathematics and Soft Computing, 2014
The packing chromatic number $\raisebox{2pt}{$\chi$}_{\rho}(G)$ of a graph $G$ is the smallest integer $k$ for which there exists a mapping $\pi:V(G)\longrightarrow \{1,2,...,k\}$ such that any two vertices of color $i$ are at distance at least $i+1$.
Indra Rajasingh, S. Roy, Albert William
openaire   +1 more source

Gap‐Free Information Transfer in 4D‐STEM via Fusion of Complementary Scattering Channels

Advanced Science, EarlyView.
Fused Full‐Field STEM (FF‐STEM) is introduced as a 4D‐STEM imaging modality that combines direct ptychography with tilt‐corrected dark‐field reconstruction in a single acquisition. Fourier‐space fusion using Wiener‐type spectral weighting closes the low‐frequency contrast gap inherent to bright‐field methods, delivering gap‐free, dose‐efficient, near ...
Shengbo You, Georgios Varnavides, Sagar Khavnekar, Nikita Palatkin, Sihan Shao, Mingjian Wu, Daniel Stroppa, Darya Chernikova, Baixu Zhu, Ricardo Egoavil, Stefano Vespucci, Dileep Krishnan, Xingchen Ye, Florian K. M. Schur, Erdmann Spiecker, Philipp Pelz   +15 more
wiley   +1 more source

Bi‐Functional Single‐Crystalline Active Layers for Uniform Area‐Emitting Organic Light‐Emitting Transistors

Advanced Electronic Materials, EarlyView.
This work employs monolayer molecular crystals (MMCs) as bi‐functional active layers in organic light‐emitting transistors (OLETs). Thanks to the efficient horizontal hole transport and vertical hole injection, the OLETs show a high mobility of 6.64 cm2V−1s−1 and exhibit uniform area emission.
Zhengyao Pu, Fugui Cai, Yang Zhang, Peiyang Li, Yujie Zhao, Jie Ren, Hanzhi Ma, Ye Shi, Boyu Peng, Hanying Li   +9 more
wiley   +1 more source

S-packing chromatic critical graphs [PDF]

For a non-decreasing sequence of positive integers $S=(s_1,s_2,ldots)$, the $S$-packing chromatic number of a graph $G$ is denoted by $chi_S(G)$. In this paper, $chi_S$-critical graphs are introduced as the graphs $G$ such that $chi_S(H) < chi_S(G)$ for ...
Gozüpek, Didem, Boruzanli Ekinci, Gülnaz, Bujtás, Csilla, Klavžar, Sandi   +3 more
core   +2 more sources

Notes on complexity of packing coloring [PDF]

, 2018
A packing k-coloring for some integer k of a graph G = (V, E) is a mapping ϕ : V → {1, . . . , k} such that any two vertices u, v of color ϕ(u) = ϕ(v) are in distance at least ϕ(u) + 1. This concept is motivated by frequency assignment problems.
Bernard Lidický, Florian Pfender, Minki Kim, Lidicky, Bernard, Tomáš Masařík, Masarik, Tomas, Pfender, Florian, Kim, Minki   +7 more
core   +2 more sources

The packing chromatic number of the square lattice is at least 12

CoRR, 2010
The packing chromatic number $χ_ρ(G)$ of a graph $G$ is the smallest integer $k$ such that the vertex set $V(G)$ can be partitioned into disjoint classes $X_1, ..., X_k$, where vertices in $X_i$ have pairwise distance greater than $i$. For the 2-dimensional square lattice $\mathbb{Z}^2$ it is proved that $χ_ρ(\mathbb{Z}^2) \geq 12$, which improves the ...
Jan Ekstein, Jirí Fiala 0001, Premysl Holub, Bernard Lidický   +3 more
openaire   +2 more sources

Redefining Crystalline Silicon: Unlocking New Horizons in Transparent and Flexible Photovoltaics

Advanced Energy Materials, EarlyView.
Crystalline silicon is presented as a platform for transparent and flexible photovoltaics. This review article outlines design principles for optical strategies to fabricate transparent silicon solar cells, mechanical strategies that mitigate silicon brittleness, and emerging concepts such as singlet‐fission spectral conversion and tandem architectures,
Kangmin Lee
wiley   +1 more source

On Packing Colorings of Distance Graphs [PDF]

, 2014
International audienceThe {\em packing chromatic number} $\chi_{\rho}(G)$ of a graph $G$ is the least integer $k$ for which there exists a mapping $f$ from $V(G)$ to $\{1,2,\ldots ,k\}$ such that any two vertices of color $i$ are at distance at least $i ...
Togni, Olivier
core   +1 more source