Results 11 to 20 of about 3,088,273 (255)

TreeCluster: Clustering biological sequences using phylogenetic trees.

open access: yesPLoS ONE, 2019
Clustering homologous sequences based on their similarity is a problem that appears in many bioinformatics applications. The fact that sequences cluster is ultimately the result of their phylogenetic relationships.
Metin Balaban   +4 more
doaj   +2 more sources

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

GASP: gapped ancestral sequence prediction for proteins [PDF]

open access: yes, 2004
Background: the prediction of ancestral protein sequences from multiple sequence alignments is useful for many bioinformatics analyses. Predicting ancestral sequences is not a simple procedure and relies on accurate alignments and phylogenies.
Edwards, Richard, Shields, Denis C.
core   +2 more sources

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

Tree-Ring Dating of the Karr-Koussevitzky Double Bass: A Case Study in Dendromusicology

open access: yes, 2005
Sergei Koussevitzky was one of the world’s premier conductors and virtuoso bass players whose favorite instrument was an unusually-shaped bass reportedly made in 1611 by the Amati brothers, Antonio and Girolamo.
Henri D. Grissino-Mayer   +5 more
core   +3 more sources

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

Structural Analysis of Polarizing Indels Argues the Root of the Tree of Life is Near the Chloroflexi [PDF]

open access: yes, 2009
Determining which branches of the tree of life have derived features narrows down the possible location of the root. Currently the polarization of indels done by Lake _et al_.^1-5^ and the polarizing transitions of Cavalier-Smith^6^ arrive at ...
Philip E. Bourne, Ruben E. Valas
core   +1 more source

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