Results 11 to 20 of about 3,903,221 (297)

On the extremal connective eccentricity index among trees with maximum degree [PDF]

open access: yesTransactions on Combinatorics, 2021
The connective eccentricity index (CEI) of a graph $G$ is defined as $\xi^{ce}(G)=\sum_{v \in V(G)}\frac{d_G(v)}{\varepsilon_G(v)}$, where $d_G(v)$ is the degree of $v$ and $\varepsilon_G(v)$ is the eccentricity of $v$. In this paper, we characterize the
Fazal Hayat
doaj   +1 more source

Assessing sense of community at farmers markets

open access: yesJournal of Agriculture, Food Systems, and Community Development, 2021
Farmers markets are valuable for reducing food insecurity and delivering healthy food options to populations living with low incomes. However, farmers markets have developed a reputation for being exclusive shopping spaces devoted to affluent, white ...
Jennifer Russomanno   +1 more
doaj   +1 more source

AUTOMATION OF QURANIC READINGS GATHERING PROCESS

open access: yesJournal of ICT, 2021
Quran has been the focus of many computer science and computational linguistics researchers. However, little contribution was directed towards Quranic readings. This field focuses on the different ways in which Quranic words can be recited.
Majed AbuSafiya
doaj   +1 more source

THE IMPACT OF AUTOMOBILE POLLUTED SOIL ON SEEDLING GROWTH PERFORMANCE IN SOME HIGHER PLANTS [PDF]

open access: yesJournal of Plant Development, 2022
Rapid increase in automobile density and discharge of different types of pollutants from automobile are a serious issue for whole civilized world and in Bhakkar also.Vehicle emission from automobiles released an enormous quantity of toxic pollutants ...
Muhammad KABIR   +5 more
doaj   +1 more source

ANALYSIS OF EFFECTS OF LEAD AND IRON TREATMENT ON EARLY SEEDLING GROWTH OF ALBIZIA LEBBECK L. (BENTH.) AND EUCALYPTUS GLOBULUS LABILL. IN VITRO STUDIES [PDF]

open access: yesJournal of Plant Development, 2022
Pollution by heavy metals in the environment is a worldwide problem. The aim of the research study was to record the effect of lead (Pb) and iron (Fe) elements on early seedling growth of Albizia lebbeck L. (Benth.) and Eucalyptus globulus Labill.
Tabinda NOREEN   +4 more
doaj   +1 more source

Flexible Trees [PDF]

open access: yesProceedings of the International Working Conference on Advanced Visual Interfaces, 2016
We introduce Flexible Trees, a sketch-based layout adjustment technique. Although numerous tree layout algorithms exist, these algorithms are usually bound to fit within standard shapes such as rectangles, circles and triangles. In order to provide the possibility of interactively customizing a tree layout, we offer a free-form sketch-based interaction
Sadeghi, Javad   +4 more
openaire   +3 more sources

A Complete Characterisation of Vertex-multiplications of Trees with Diameter 5

open access: yesTheory and Applications of Graphs, 2021
For a connected graph $G$, let $\mathscr{D}(G)$ be the family of strong orientations of $G$; and for any $D\in\mathscr{D}(G)$, we denote by $d(D)$ the diameter of $D$. The $\textit{orientation number}$ of $G$ is defined as $\bar{d}(G)=\min\{d(D)\mid D\in
Willie Wong, Eng Guan Tay
doaj   +1 more source

Spectral ordering and 2-switch transformations [PDF]

open access: yesThe American Journal of Combinatorics, 2022
We address the problem of ordering trees with the same degree sequence by their spectral radii. To achieve that, we consider 2-switch transformations which preserve the degree sequence and establish when the index decreases.
Elismar Oliveira   +2 more
doaj  

Conflict-Free Vertex-Connections of Graphs

open access: yesDiscussiones Mathematicae Graph Theory, 2020
A path in a vertex-colored graph is called conflict-free if there is a color used on exactly one of its vertices. A vertex-colored graph is said to be conflict-free vertex-connected if any two vertices of the graph are connected by a conflict-free path ...
Li Xueliang   +5 more
doaj   +1 more source

Matching-Type Image-Labelings of Trees

open access: yesMathematics, 2021
A variety of labelings on trees have emerged in order to attack the Graceful Tree Conjecture, but lack showing the connections between two labelings. In this paper, we propose two new labelings: vertex image-labeling and edge image-labeling, and combine ...
Jing Su, Hongyu Wang, Bing Yao
doaj   +1 more source

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