Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 12 of 12 for “"Wiener index"”.
-
Graphical Indices and their Applications
… pure graph theoretical indices: the Randić index, the Wiener index, the degree distance, and the number of subtrees. We find which structure will maximize the Randić index of a class of graphs known as cacti, and we find a functional relationship between the Wiener index and the degree …
-
Geometric and Algebraic Graphs and their Applications
<p>In this thesis, we begin with a look at the Wiener Index and its correlation with the boiling point of a hydrocarbon. Though the Wiener Index correlates physical properties of chemical compounds relatively well, we produce a new method of modeling the hydrocarbons and their chemical property …
-
Structure vs. Properties Using Chemical Graph Theory
… the sub-categories of such systems with extremal Wiener indices. We provide a labeling of the vertices on each hexagon, which facilitates the illustration of a tree-like polyphenyl system with its corresponding tree structure. This approach helps to characterize the extremal tree-like polyphenyl …
-
Diversity of ectomycorrhizal fungi on two reclaimed surface mines differing in soil properties
… of field collected mycorrhizae. However, Shannon-Wiener index values indicated that the two communities were equally diverse. A population of isolates of one species common to both sites was obtained from trap cultures planted with white pine. The identity of this species as Wilcoxina mikolae was …
-
Assessing the utility of open-source data in exploring benthic biodiversity in mining concessions off the South African coast
… quantitative measures (species richness, Shannon-Wiener index) and multivariate analyses, where possible. Each dataset provided a different aspect of the benthic biota within the concessions, including taxonomic data (i.e., species, genera, class, phylum) that are easily quantified within a …
-
Patterns in reef fish assemblages as determined by baited remote underwater video (BRUV) along the western side of False Bay: effects of site, depth and protection status
… was recorded. Species diversity (Shannon-Wiener index) was found to increase with sites closest to the mouth of the bay, whilst species abundance was found to increase with depth. Results indicated no consistent response to protection status among the sites at either the community or …
-
Identifying floral hosts of cerambycid beetles using palynology
… beetles collected otherwise. I used the Shannon-Wiener Index to describe the diversity of pollen in the frass of beetles collected from flowers. There was high alpha diversity of pollen grains in the frass of Callimoxys sanguinicollis (Olivier) on Cornus drummondii C.A.Mey. (Cornaceae) and …
-
Lake Erie coastal marsh aquatic invertebrate community structure across habitats dominated by two different emergent macrophytes
… Invertebrates were assessed using the Shannon-Wiener Index, taxon richness, and abundance values which were all analyzed using t-tests and Mann-Whitney U-tests. Invertebrate community structure was analyzed using principal component analysis (PCA) and multivariate analysis of variance (MANOVA) …
-
Tertiary dinoflagellate, acritarch, and chlorophyte assemblages from the Oak Grove Core, Virginia Coastal Plain
… species diversity indicators (richness, Shannon-Wiener index, evenness) and analyses patterned after previous palynological studies suggesting correlation of various assemblage parameters and characteristics with particular depositional environments. Results are consistent with sedimentological …
-
Analyse des Vorkommens, der Morphologie und der genetischen Diversität von Biologischen Bodenkrusten extrazonaler Gebirgssteppenstandorte der nördlichen Mongolei
… Artebene nicht ausgeschöpft wurde. Der Shannon-Wiener-Index für Biodiversität für den weniger gestörten Standort betrug für eine Distanz von 3 % 3,93 und für eine Distanz von 20 % 2,12. Für den stärker gestörten Standort betrug er für eine Distanz von 3 % 4,39 und für die Distanz von 20 % 2,64.
-
Effects of land-use change on benthic macroinvertebrates in the upper reaches of the Apies-Pienaar catchment
… family richness, SASS score, ASPT, Shannon-Wiener index, Pielou s evenness, non-metric multidimensional scaling and Indval analyses. Nineteen families were collected, of which only three made up 80% of macroinvertebrates sampled. These families were Hirudinea, Chironomidae and Oligochaeta. …
-
Smulkiųjų žinduolių bendrijos pokyčiai Zarasų rajone /
… small mammal community structure using Shannon-Wiener diversity index (H) and Simpson’s dominance index (c), to analyse the influence of snow cover depth and air temperature on small mammals abundance and to investigate, whether mandibular and maxillary measurements in shrews, mise and voles …