Results 11 to 20 of about 706 (195)

Signed double roman domination of graphs

Filomat, 2019
In this paper we continue the study of signed double Roman dominating functions in graphs. A signed double Roman dominating function (SDRDF) on a graph G = (V,E) is a function f : V(G)  {-1,1,2,3} having the property that for each v  V(G), f [v] ≥
Hossein Ahangar Abdollahzadeh, Mustapha Chellali, Seyed Mahmoud Sheikholeslami   +2 more
openalex   +2 more sources

[k]-Roman Domination in Digraphs

Symmetry, 2023
Let D=(V(D),A(D)) be a finite, simple digraph and k a positive integer. A function f:V(D)→{0,1,2,…,k+1} is called a [k]-Roman dominating function (for short, [k]-RDF) if f(AN−[v])≥|AN−(v)|+k for any vertex v∈V(D), where AN−(v)={u∈N−(v):f(u)≥1} and AN−[v]=
Xinhong Zhang, Xin Song, Ruijuan Li
semanticscholar   +1 more source

Double Roman Domination: A Survey

Mathematics, 2023
Since 2016, when the first paper of the double Roman domination appeared, the topic has received considerable attention in the literature. We survey known results on double Roman domination and some variations of the double Roman domination, and a list ...
Darja Rupnik Poklukar, J. Žerovnik
semanticscholar   +1 more source

Acid‐ and Nucleophile‐Gated Photoisomerization of Phosphaindirubin

Angewandte Chemie, EarlyView.
Triply gated isomerization: In polar solvents, a phosphorus‐containing indirubin photoswitch undergoes visible‐light‐driven Z→E isomerization only when protonated, and reverts thermally via nucleophile‐catalyzed back‐isomerization. This three‐way control by light, acid, and nucleophile enables reversible photoisomerization.
Jacob Jan van der Wal, Jorn D. Steen, Ann‐Kathrin Rückert, Roman Yu. Peshkov, Michiel F. Hilbers, P. Tim Prins, Wybren Jan Buma, Andreas Orthaber, Stefano Crespi   +8 more
wiley   +2 more sources

DOUBLE ROMAN DOMINATION NUMBER OF MIDDLE GRAPH

South East Asian J. of Mathematics and Mathematical Sciences, 2022
For any graph G(V,  E), a function f : V (G)    0, 1, 2, 3     is called Double Roman dominating function (DRDF) if the following properties holds, If f (v) = 0, then there exist two vertices v1, v2 ∈ N (v) for which f (v1) = f (v2) = 2 or there exist ...
Shailaja S. Shirkol, Pavitra P. Kumbargoudra, Meenal M. Kaliwal   +2 more
semanticscholar   +1 more source

Porous Coatings by Vapor Sublimation and Deposition for Molecular Channeling and Filtration in an Interstitial Fluid Microfiltration Device

Advanced Healthcare Materials, EarlyView.
A vapor‐based porous coating applied within nitinol tubes demonstrated complete suppression of cellular and tissue ingrowth, overcoming a major limitation of implantable interstitial fluid collection devices. Molecular channeling and diffusion are analyzed with probe molecules, showing reliable transport in vitro and in vivo. The coating also achieved >
Yu‐Ming Chang, Chi‐Yu Huang, Yi‐Jia Ke, Yi‐Wei Lin, Yen‐Hui Chan, Ying‐Chang Lu, Yu‐Chih Chiang, Chen‐Chi Wu, Hsien‐Yeh Chen   +8 more
wiley   +1 more source

Double Roman Domination in Generalized Petersen Graphs P(ck, k)

Symmetry, 2022
A double Roman dominating function on a graph G=(V,E) is a function f:V→{0,1,2,3}, satisfying the condition that every vertex u for which f(u)=1 is adjacent to at least one vertex assigned 2 or 3, and every vertex u with f(u)=0 is adjacent to at least ...
D. R. Poklukar, J. Žerovnik
semanticscholar   +1 more source

Giant Berry‐phase‐Driven X‐Ray Beam Translations in Strain‐Engineered Semiconductor Crystals

Advanced Materials, EarlyView.
Due to the Berry‐phase effect, X‐rays propagating in deformed crystals undergo large translations, interesting for X‐ray optics applications. Here, the lattice expansion observed upon H irradiation of dilute‐nitride semiconductors is exploited to engineer the deformation landscape of selectively hydrogenated GaAsN epilayers.
Marco Felici, Giorgio Pettinari, Michela Fratini, Luisa Barba, Simone Birindelli, Gaetano Campi, Silvia Rubini, Tobias Schülli, Mario Capizzi, Antonio Polimeni   +9 more
wiley   +1 more source

Negative Differential Transconductance Induced by Electrostatic Doping in Multi‐Functional Si Field‐Effect Transistors

Advanced Materials Technologies, EarlyView.
We demonstrate an adaptive Si field‐effect transistor featuring a negative differential transconductance (NDT) mode alongside run‐time switchable PMOS and NMOS operation. This is achieved by precisely controlling the charge carrier type in the transistor by electrostatic gating.
Andreas Fuchsberger, Masiar Sistani, Kilian Eysin, Walter M. Weber   +3 more
wiley   +1 more source

Lower and upper bounds on independent double Roman domination in trees

Electronic Journal of Graph Theory and Applications, 2022
For a graph G = ( V, E ) , a double Roman dominating function (DRDF) f : V → { 0 , 1 , 2 , 3 } has the property that for every vertex v ∈ V with f ( v ) = 0 , either there exists a neighbor u ∈ N ( v ) , with f ( u ) = 3 , or at least two neighbors x, y ∈
M. Kheibari, H. Ahangar, R. Khoeilar, S. Sheikholeslami   +3 more
semanticscholar   +1 more source