نتایج جستجو برای: albertson estrada index
تعداد نتایج: 396903 فیلتر نتایج به سال:
Characterization of Pre-Monsoon Aerosol and Aerosol-Cloud-Rainfall Interactions in Central Nepal by Prabhakar Shrestha Department of Civil and Environmental Engineering Duke University Date:_______________________ Approved: ___________________________ Ana P. Barros, Supervisor ___________________________ Andrei Khlystov ___________________________ John D. Albertson ___________________________ M...
Let $G=(V(G),E(G))$ be a simple graph with vertex set $V(G)=\{v_{1},v_{2},\cdots, v_{n}\}$ and edge $E(G)$. The $p$-Sombor matrix $\mathcal{S}_{p}(G)$ of $G$ is the square order $n$ whose $(i,j)$-entry equal to $((d_{i})^{p}+(d_{j})^{p})^{\frac{1}{p}}$ if $v_{i}\sim v_{j}$, 0 otherwise, where $d_{i}$ denotes degree $v_{i}$ in $G$. In this paper, we study relationship between index $SO_{p}(G)$ b...
Pamela L. Paris, Armann Andaya, Jane Fridlyand, Ajay N. Jain, Vivian Weinberg, David Kowbel, John H. Brebner, Jeff Simko, J.E. Vivienne Watson, Stas Volik, Donna G. Albertson, Daniel Pinkel, Janneke C. Alers, Theodorus H. van der Kwast, Kees J. Vissers, Fritz H. Schroder, Mark F. Wildhagen, Phillip G. Febbo, Arul M. Chinnaiyan, Kenneth J. Pienta, Peter R. Carroll, Mark A. Rubin, Colin Collins* ...
Albertson and Collins defined the distinguishing number of a graph to be the smallest number of colors needed to color its vertices so that the coloring is preserved only by the identity automorphism. Collins and Trenk followed by defining the distinguishing chromatic number of a graph to be the smallest size of a coloring that is both proper and distinguishing. We show that, with two exception...
Given a directed graph, an acyclic set is a set of vertices inducing a directed subgraph with no directed cycle. In this note we show that for all integers n ≥ g ≥ 3, there exist oriented planar graphs of order n and digirth g for which the size of the maximum acyclic set is at most dn(g−2)+1 g−1 e. When g = 3 this result disproves a conjecture of Harutyunyan and shows that a question of Albert...
Land-atmosphere Interaction: from Atmospheric Boundary Layer to Soil Moisture Dynamics by Jun Yin Department of Civil and Environmental Engineering Duke University Date:_______________________ Approved: ___________________________ John Albertson, Supervisor ___________________________ Amilcare Porporato ___________________________ Gabriel Katul ___________________________ J.R. Rigby An abstract...
Several attitudes toward Statistic scales have been proposed in the literature by considering samples of university students but specific scales with cross-cultural validity are not known for teachers. In this study we show the psychometric characteristic of the scale of Attitudes toward the Statistic proposed by Estrada (2002) and Estrada Batanero and Fortuny (2003). The scale was applied to 2...
In this talk we consider some results and open problems from the Chemical Graph Theory, mainly concerning structural indices/properties. The Atom Bond Connectivity index, also known as ABC index was defined by Estrada [4] with relation to the energy of formation of alkanes. It was quickly recognized that this index reflects important structural properties of graphs in general. The ABC index was...
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