Results 1 to 10 of about 421,300 (119)

Application of vine copulas to dependence analysis of water quality data [PDF]

open access: yesJournal of Applied Research in Water and Wastewater, 2022
In this study, using vine copulas and tree sequences, dependence analysis of groundwater quality variables (Total hardness (TH), Sodium adsorption ratio (SAR), Sodium percentage (Na %) and magnesium (Mg)) was performed.
Mohammad Nazeri Tahroudi   +3 more
doaj   +1 more source

The use of RT-PCR in the diagnosis and differentiation of vaccine strains of chicken infectious bronchitis and Newcastle disease

open access: yesOpen Veterinary Journal, 2023
Background: Infectious diseases of young and adult birds with respiratory syndrome are a significant deterrent to the development of industrial poultry farming due to a decrease in productivity and significant mortality.
Nigmetulla Assanov   +4 more
doaj   +1 more source

Simulation of potential evapotranspiration values based on vine copula

open access: yesMeteorological Applications, 2021
Vine copula had a great impact on the study and analysis of dependence structures in various sciences. In multivariate analyses with dimensions of more than two variables, it is associated with computational complexities that solve vine copulas and these
Abbas Khashei‐Siuki   +3 more
doaj   +1 more source

The effect of single recombination events on coalescent tree height and shape. [PDF]

open access: yesPLoS ONE, 2013
The coalescent with recombination is a fundamental model to describe the genealogical history of DNA sequence samples from recombining organisms. Considering recombination as a process which acts along genomes and which creates sequence segments with ...
Luca Ferretti   +2 more
doaj   +1 more source

An extremal problem for a graphic sequence to have a realization containing every 2-tree with prescribed size [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2016
A graph $G$ is a $2$-tree if $G=K_3$, or $G$ has a vertex $v$ of degree 2, whose neighbors are adjacent, and $G-v$ is a 2-tree. Clearly, if $G$ is a 2-tree on $n$ vertices, then $|E(G)|=2n-3$.
De-Yan Zeng, Jian-Hua Yin
doaj   +1 more source

Branch-Weight Unique Trees

open access: yesDiscussiones Mathematicae Graph Theory, 2022
A branch at a vertex x in a tree is a maximal subtree containing x as an endvertex. The branch-weight of x is the maximum number of edges in any branch at x.
Shang Jen-Ling
doaj   +1 more source

The difficulty of aligning intrinsically disordered protein sequences as assessed by conservation and phylogeny.

open access: yesPLoS ONE, 2023
Intrinsically disordered proteins (IDPs) are proteins that lack a stable 3D structure but maintain a biological function. It has been frequently suggested that IDPs are difficult to align because they tend to have fewer conserved residues compared to ...
Andrew C Riley   +2 more
doaj   +1 more source

Full sequence analysis and characterization of the South Korean Norovirus GII-4 variant CUK-3

open access: yesVirology Journal, 2011
Background Many of researchers have focused on the emerging pathogen, Norovirus, since its first identification as the causing agent of nonbacterial acute gastroenteritis in humans.
Ryu Sangryeol   +5 more
doaj   +1 more source

Assessment of sequence homology and immunologic cross-reactivity between tree shrew (Tupaia belangeri) and human IL-21. [PDF]

open access: yesPLoS ONE, 2017
Many studies have indicated that the expression of interleukin-21 (IL-21) is associated with the pathogenesis of certain liver diseases. However, in alternative animal models of liver diseases, it remains unknown whether the tree shrew could be utilized ...
Rong Ding   +7 more
doaj   +1 more source

Some Special Sequences in Fuzzy Graphs

open access: yesFuzzy Information and Engineering, 2016
In a fuzzy graph, the edges are mainly classified into α, β and δ. In this paper, some sequences in fuzzy graphs are introduced, whose concepts are based on the classification of edges.
Jill K. Mathew, Sunil Mathew
doaj   +1 more source

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