Materials Science & Technology: Recent submissions
Now showing items 41-60 of 310
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Fundamental group and cycle space of dual graphs and applications
( Elsevier , 2010 , Article)In this work, we study the fundamental group of dual graph of a planar graph. Moreover, we show that a planar graph G has no cut vertex if and only if N(Π(D(G))) = N(Π(D(G − v))) − 1 for any v ∈ V(G). Some applications ... -
Minimum cycle bases for direct products of K2 with complete graphs
( University of Queensland Press , 2009 , Article)We construct a minimum cycle basis for the direct product K2 x Kp of two complete graphs where p > 2. For p > 3, these bases consists only of squares. This completes the work of R. Hammack, who treated the case Kp x ... -
Engine oil based MoS2Casson nanofluid flow with ramped boundary conditions and thermal radiation through a channel
( Elsevier , 2022 , Article)The modern era is a time to have cost-effective and energy-efficient technology. This demand has made nanotechnology the most effective field. The focus of this article is to increase the efficiency of engine oil (EO). The ... -
Edge-maximal -free non-bipartite Hamiltonian graphs of odd order
( Taylor and Francis Ltd. , 2022 , Article)Let (Formula presented.) denote the class of non-bipartite graphs on n vertices containing no (Formula presented.) -graph and (Formula presented.) Let (Formula presented.) denote the class of non-bipartite Hamiltonian ... -
Edge-maximal graphs without θ 7 -graphs
( Tokyo University of Science , 2011 , Article)Let G(n; θ2k+1, ≥ δ) denote the class of non-bipartite θ2k+1-free graphs on n vertices and minimum degree at least δ and let f (n; θ2k+1, ≥ δ) = max{ε(G): G ∈ G(n; θ2k+1, ≥ δ)}. In this paper we determinj an upker bound ... -
Edge-Maximal Graphs Without θ2k+1-Graphs
( Taylor and Francis Ltd. , 2014 , Article)Let σ(n; θ2k+1) denote the class of non-bipartite graphs on n vertices having no θ2k+1- graph and f(n; θ2k+1) = max{ ε(G): G ∊ σ (n; θ2k+1)}. In this paper we determine f(n; θ2k+1), by proving that for k ≥ 4 and n ≥ 36k. ... -
Bifurcation of some new traveling wave solutions for the time-space M- fractional MEW equation via three altered methods
( Elsevier , 2022 , Article)In this work,(1/G′ ), modified ( G′ /G2) and new extended direct algebraic methods are proposed to construct the novel exact traveling wave solutions in the form of trigonometric, hyperbolic and exponential functions ... -
A Class of Koszul Algebra and Some Homological Invariants through Circulant Matrices and Cycles
( Hindawi Limited , 2022 , Article)Recent advances in graph theory, linear algebra, and commutative algebra render us to tackle problems in one bough of mathematics with assistance and guidance from others. We will elaborate foremost and conceptually ... -
A Novel and Efficient Method for Computing the Resistance Distance
( Institute of Electrical and Electronics Engineers Inc. , 2021 , Article)The resistance distance is an intrinsic metric on graphs that have been extensively studied by many physicists and mathematicians. The resistance distance between two vertices of a simple connected graph $G$ is equal to ... -
Edge-Maximal θ2k+1-Edge Disjoint Free Graphs
( Kyungmoon Publishing , 2014 , Article)For two positive integers r and s, G(n; r; θs) denotes to the class of graphs on n vertices containing no r of edge disjoint θs-graphs and f(n; r; θs) = max{E(G) : G ∈ G(n; r; θs)}. In this paper, for integers r, k ≥ 2, ... -
Edge Maximal C2k+1-edge Disjoint Free Graphs
( University of Zielona Gora , 2012 , Article)For two positive integers r and s, G(n;r,s) denotes to the class of graphs on n vertices containing no r of s-edge disjoint cycles and f(n;r,s) = max{E(G):G ∈ G(n;r,s)}. In this paper, for integers r ≥ 2 and k ≥ 1, we ... -
A note on the Ramsey number for small graphs
( Taylor and Francis Ltd. , 2022 , Article)Problems in the Ramsey theory form a well-known family of mathematical problems. We present the exact value of the Ramsey number R(θ6, W5), where θ6 is the set of theta graphs of order 6 and W5 is the wheel graph of order ... -
A new upper bound of the basis number of the lexicographic product of graphs
( Charles Babbage Research Centre , 2010 , Article)An upper bound of the basis number of the lexicographic product of two graphs from the basis number of the factors is presented. Furthermore, the basis numbers of the lexicographic product of some classes of graphs is determined. -
A review of membrane-based dewatering technology for the concentration of liquid foods
( Elsevier Ltd , 2023 , Article)The imperative to establish environmentally friendly and sustainable food processing techniques has compelled the food industry to explore alternative approaches that uphold food quality, ensure nutritional integrity, and ... -
Integrated photoelectrochemical (PEC)-forward osmosis (FO) system for hydrogen production and fertigation application
( Elsevier Ltd , 2023 , Article)This study proposes an integrated system that combines a photoelectrochemical (PEC) system and forward osmosis (FO) system in tandem operation to address water, energy, and food (WEF) scarcity. The system utilizes a ... -
The effect of graphene on the activation energy of grain growth for the nanocrystalline thermoelectric n‑type Bi2Te2.7Se0.3
(2022 , Article)Even though bismuth telluride is frequently produced by mechanical alloying for thermoelectric materials, no data has been published addressing the thermal behavior and activation energy of the milled n-type Bi2Te2.7Se0.3 ... -
Evaluation of the Influence of Eggshell (ES) Concentration on the Degradation Behavior of Mg–2.5Zn Biodegradable Alloy in Simulated Body Fluid
( American Chemical Society (ACS) , 2023 , Article)Currently, permanent vascular stents are fabricated using titanium and stainless steel implants that are nondegradable and offer high stability, but they have certain disadvantages. For example, the prolonged exposition ... -
Revealing microstructure and dislocation behavior in BAlN/AlGaN heterostructures
( Japan Society of Applied Physics , 2018 , Article)We reveal the microstructure and dislocation behavior in 20-pair B0.14Al0.86N/Al0.70Ga0.30N multiple-stack heterostructures (MSHs) exhibiting an increasing dislocation density along the c-axis, which is attributed to the ... -
Telecommunication-wavelength lasing in er-doped gan multiple quantum wells at room temperature
( OSA - The Optical Society , 2018 , Conference)We report the realization of room-temperature, stimulated-emission in Er-doped-GaN multiple-quantum-wells at the 1.5-µm. Structures were grown by MOCVD and lasing was confirmed by threshold-behaviors of emission-intensity ... -
Co2+ substituted for Bi3+ in BiVO4 and its enhanced photocatalytic activity under visible LED light irradiation
( Royal Society of Chemistry , 2019 , Article)We investigated the fabrication of Co-doped BiVO4 (Bi1-xCoxVO4+δ, 0.05 < x < 0.5) by the substitution of Co ions for Bi sites in BiVO4. The X-ray diffraction (XRD), Raman, and X-ray photoelectron spectroscopy (XPS) results ...
