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812 articles for “Sierpi´cski graph”
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Evolution of Graphene Oxide : A Survey
Abstract: Graphene, first isolated in 2004, is the 2D material that captivated researchers’ attention due to its extraordinary properties. These extraordinary properties motivated researchers to keep on searching better ways for synthesis of Graphene oxide (GO) and reduced graphene oxide (rGO). Several synthesis(oxidation-reduction) mechanisms are available in literature such as: Staudenmaier’s(ST), Hofmann’s (HO), Hummers’ (HU), Modified Hummer’s (MHU), improved Hummers’(IHU) and Mild Oxidation(MO) methods for oxidation and thermal, chemical, hydrothermal and …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 5, Issue 2, 2018 · pp. 31–39 Read article
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Interface Engineering of Graphene Multi-Junction InGaP/GaAs/InGaAs/Ge Solar PVC
Abstract: AbstractThe main impediment faced by solar Photo-Voltaic Cell (PVC) is the excitation of charge carriers by high and low energy photons to make them reach the conduction band as this superintends the output device current. To enhance the device current, intermediate engineering of solar PVC is the most prominent strategy. An Inter-Mediate Layer (IML) serves as a spectrally selective layer between the muti-junctions for tandem solar cell. This research work …
Published in Trends in Opto-electro & Optical Communication · Vol. 8, Issue 1, 2018 · pp. 1–7 Read article
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3-Equitable Labeling in Context of Ring Sum of Graphs
Abstract: A function f from vertex set V of a graph G to the set {0, 1, 2} is called 3-equitable labeling if the edge labels produced by absolute difference of the labels of end vertices of the respective edges in such a way that the number of edges with label i and j differ by atmost 1 and similarly the number of vertices with label i and j differby atmost …
Published in Research & Reviews: Discrete Mathematical Structures · Vol. 2, Issue 3, 2015 · pp. 10–19 Read article
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On b-Coloring Parameters of Some Classes of Graphs
Abstract: AbstractVertex coloring has always been a topic of interest. Motivated by the studies on -chromatic mean and variance of some standard graphs, in this paper, we obtain few results for -chromatic and -chromatic mean and variance of some cycle related graph classes. Here, Vertex coloring of a graph is taken to be the random experiment. Discrete random variable for this random experiment is the color of randomly chosen vertex of …
Published in Research & Reviews: Discrete Mathematical Structures · Vol. 6, Issue 2, 2019 · pp. 41–48 Read article
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Injective Coloring Parameters of Some Special Classes of Graphs
Abstract: AbstractThe vertex coloring of a graph can be viewed as a random experiment and with respect to this experiment, a random variable can be defined such that denotes the color of an arbitrarily chosen vertex. In this paper, we broaden the ideas of coloring mean and variance of graphs with respect to a particular type of proper injective coloring and determine these parameters for some standard graph classes.MSC2010: 05C15, 05C38. …
Published in Research & Reviews: Discrete Mathematical Structures · Vol. 6, Issue 2, 2019 · pp. 30–41 Read article
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An Atlas of Vertex Degree Polynomials of Graphs of Order at Most Six
Abstract: AbstractThe vertex degree polynomial of a graph G of order n is defined as V D(G, x) = åuv∈E(G) d(u)xd(v) where d(u) is the degree of the vertex u [5]. We call the roots of a vertex degree polynomial of a graph the vertex degree roots of that graph. In this article, we compute the vertex degree polynomial of all graphs of order less than or equal six and their …
Published in Research & Reviews: Discrete Mathematical Structures · Vol. 7, Issue 3, 2020 · pp. 7–14 Read article
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A Review on Graphical Assembly Sequence Representation Methods and Their Advancements
Abstract: Representation of assembly sequence is significantly essential to describe many assembly attributes such as the connections between the components, sequence of the assembly operations, assembly trajectory constraints, assembly mating conditions, etc. Graphical or tree structure-based assembly sequence representation methods are most used in assembly sequence planning to obtain feasible assembly sequence, and to represent assembly attributes. Assembly sequence representation methodology carries an important role in assembly sequence planning and automation. …
Published in Journal of Mechatronics and Automation · Vol. 1, Issue 3, 2014 · pp. 56–66 Read article
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Advancements In Energy Storage Materials Are Overcoming Challenges and Shaping Future Innovations
Abstract: The pursuit of efficient energy storage technologies is critical for advancing renewable energy systems and improving the performance of electric vehicles. This review emphasizes the synergistic contributions of polymers and composite materials in phase change materials (PCMs), zinc-based batteries (ZnBs), lithium-ion batteries (LIBs), and graphene-based systems. PCMs, particularly polymer-encapsulated and polymer-stabilized composites, demonstrate a remarkable ability to store and release thermal energy, enabling improved thermal management and operational stability. In …
Published in Journal of Polymer & Composites · Vol. 14, Issue 3, 2026 · pp. 704–723 Read article
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Enhancement of Mechanical Properties in Eutectic Al-Si Alloy Matrix Composites Reinforced with Kyanite and Graphite via Stir Casting
Abstract: The purpose of this work is to enhance the mechanical performance of a eutectic Al–Si alloy by incorporating hard ceramic (kyanite) and soft solid lubricant (graphite) reinforcements using a liquid-state stir casting route. Metal matrix composites were fabricated with kyanite contents of 2, 4, and 6 wt.% and a constant 2.5 wt.% graphite. Their microstructures and mechanical properties were systematically evaluated. The microstructure was examined using optical microscopy and energy …
Published in Journal of Polymer & Composites · Vol. 14, Issue 2, 2026 · pp. 90–100 Read article
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Network Analysis and Synthesis Through Graph Theory as a Tool
Abstract: AbstractAs time went on, the systems to be dealt with increased enormously in size and complexity. Simultaneously, there has been an evolution in combinatory and graph theory, which led to producing a number of highly efficient graph theoretic algorithms devised with an eye on economy in time and computer storage requirements. Because of space limitations the current review cannot deal with the whole spectrum of relevant topics and will try …
Published in Journal of Microwave Engineering and Technologies · Vol. 6, Issue 3, 2019 · pp. 11–17 Read article
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Numerical Simulation and Modeling of Graphene Field Effect Transistors for High Frequency Applications
Abstract: AbstractIn this paper numerical simulation of graphene field effect transistor (GFET) has been performed using finite element method by solving Poisson's equation, continuity equation and energy balance equation self consistently. Various performance characteristics including charge distribution, band gap energy, transfer and output characteristics, electrostatic potential distribution and transconductance have been extracted.Keywords: Graphene field effect transistor (GFET), energy balance equation, mobility, ambipolar, numerical simulationCite this ArticleAshish Jha, Dwivedi ADD. Numerical Simulation …
Published in Journal of Microelectronics and Solid State Devices · Vol. 5, Issue 1, 2018 · pp. 27–33 Read article
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Progress of Graphene/Silicon Solar Cells-Present Status & Future Prospect
Abstract: The ever-increasing demand for next-generation high efficiency low cost solar cell has triggered interest to search for new materials which are easily available, environmentally benign as well as cost-effective. In this context, graphene has attracted tremendous importance due to its outstanding optical, electrical and mechanical properties, for possible application in future graphene/silicon Schottky and heterojunction solar cells. Significant progress has been noted as the power conversion efficiency of such cells …
Published in Journal of Semiconductor Devices and Circuits · Vol. 7, Issue 3, 2020 · pp. 19–29 Read article
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Enhancing Radiographic Dental Image Visualisation with Colourisation and Graphical User
Abstract: Radiography has been used in dentistry to find cavities, bone loss, hidden dental structures, tumour, and cysts. Due to the monochromatic characteristic of X-ray images, it is difficult to discern disorders and explain the diagnosis procedure. Enhance the visualization of X-rays is one of the ways to ease the work of the dentist. There were several studies to enhance visualization by giving pseudo colour shades to monochromatic images. The conclusion …
Published in Journal of Image Processing & Pattern Recognition Progress · Vol. 7, Issue 2, 2020 · pp. 7–19 Read article
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Fibonacci Cordial Labeling of Some Graphs
Abstract: An injective function f: V (G) → {F0, F1, F2, . . . , Fn+1}, where Fj is the jth Fibonacci number (j = 0, 1, . . . , n+1), is said to be Fibonacci cordial labeling if the induced function f ∗ : E(G) → {0, 1} defined by f ∗(uv) = (f (u) + f (v))(mod2) satisfies the condition |ef (0) − ef (1)| ≤ 1. A …
Published in Research & Reviews: Discrete Mathematical Structures · Vol. 5, Issue 1, 2018 · pp. 1–4 Read article
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Zagreb Degree Eccentricity Indices of Graphs
Abstract: AbstractLet G be a connected graph, the first Zagreb index M1(G) of G is defined as The second Zagreb index M2(G) of G is defined as In this paper we introduce first and second Zagreb degree eccentricity indices. Further, the first Zagreb degree eccentricity index of join, Cartesian product, tensor product, corona product of two graphs are computed. Keywords: Zagreb indices, Eccentricity, Degree, Zagreb degree eccentricity indices. Cite this ArticlePadmapriya …
Published in Research & Reviews: Discrete Mathematical Structures · Vol. 6, Issue 2, 2019 · pp. 59–69 Read article
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Biomedical Image Processing: Retinal Blood Vessel Segmentation using Graph Cut Technique
Abstract: Retinal image, which is used in determining different diseases in the eye of a human being, is an important feature in the field of ophthalmology. Similarly, optic disc detection is also an important feature as it locates diseases and defects. In Image processing of fundus, image vessel extraction is the key feature used in doing so. Here, we are presenting the Graph Cut method which helps in extracting blood vessels …
Published in Current Trends in Signal Processing · Vol. 5, Issue 1, 2015 · pp. 17–20 Read article
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Graphene Coating on Cutting Tools Can Remove the Use of Coolants
Abstract: Graphene attracts particular interests due to its unique properties like high temperature operations, high mechanical strength and lubricating properties etc. Recently Arshi and Dighewar have studied to improve surface roughness, tool life and production rate of materials by using a protective covering of titanium nitride (TiN) over steel tools [1]. They have obtained satisfactory results. In this paper, we use graphene as a coating on metal cutting tools and have …
Published in Journal of Nanoscience, NanoEngineering & Applications · Vol. 6, Issue 1, 2016 · pp. 1–5 Read article
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Synergistic Reinforcement of Graphene Oxide-polyvinyl Alcohol Bionanocomposite to Enhance Mechanical Performance
Abstract: Due to excessive depletion of natural sources, it is mandatory to exploit biopolymer nanocomposites to get rid of hazardous environmental issues. In this work, GO is used as nanofiller reinforcement in PVA matrix which has been fabricated via solution casting methodology (a biomimetic approach). The results showed that a small amount of graphene oxide content could enhance the mechanical as well as thermal properties of PVA-GO nanocomposites. At 1.5% GO …
Published in Research & Reviews : Journal of Physics · Vol. 8, Issue 3, 2019 · pp. 20–26 Read article
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Hybrid Approach for Community Detection Using Deep Learning Techniques
Abstract: Community detection in complex networks is a fundamental problem with applications across diverse domains, ranging from social networks to biological systems and beyond. Traditional methods based on graph theory have been widely used for identifying communities within networks. However, the intricate and evolving nature of modern networks demands more sophisticated approaches. This research work proposes a hybrid approach that combines the strengths of deep learning techniques with traditional community detection …
Published in Recent Trends in Electronics Communication Systems · Vol. 11, Issue 3, 2024 · pp. 18–26 Read article
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Comparison of 11-Atom Armchair Graphene Nanoribbons and Zig-Zag Carbon Nanotubes in Polymer Composites Under Various Bias Voltages: A Study of Electronic and Transmission Properties
Abstract: In this research, 11-atom zig-zag carbon nanotubes (ZCNTs) and 11-atom armchair graphene nanoribbons (AGNRs) were studied under applied bias voltages at 50, 150, and 300 millivolt levels. The focus was on understanding their behaviour concerning transmission qualities, current-voltage (I-V) characteristics, and energy-momentum (E-K) diagrams. The Non-Equilibrium Green's Function (NEGF) approach was employed to analyse various electronic properties for ZCNTs and AGNRs, including transmission, E-K relationships, and I-V characteristics. The results …
Published in Journal of Polymer & Composites · Vol. 13, Issue 2, 2025 · pp. 126–134 Read article