Results 31 to 40 of about 564,780 (171)

Microelectrode recordings from the human cervical vagus nerve during maximal breath-holds. [PDF]

open access: yesExp Physiol
Abstract Voluntary breath‐holds can be sustained for a long time following training, but ultimately, regardless of duration, the asphyxic break‐point is reached and the apnoea terminated. The physiological changes occurring during the apnoea include a marked increase in sympathetically‐mediated vasoconstriction in non‐essential organs, such as skeletal
Macefield VG   +7 more
europepmc   +2 more sources

Some topological properties of uniform subdivision of Sierpiński graphs

open access: yesMain Group Metal Chemistry, 2021
Sierpiński graphs are family of fractal nature graphs having applications in mathematics of Tower of Hanoi, topology, computer science, and many more diverse areas of science and technology. This family of graphs can be generated by taking certain number
Liu Jia-Bao   +3 more
doaj   +1 more source

Orthogonal Polynomials, Paraorthogonal Polynomials, and Point Perturbation [PDF]

open access: yes, 2009
This thesis consists of three parts. Part 1 starts with an introduction to orthogonal polynomials, to be followed by some well-known theorems pertinent to the results we shall discuss.
Wong, Manwah Lilian
core   +1 more source

Computational Analysis of new Degree-based descriptors of oxide networks

open access: yesOpen Chemistry, 2019
Oxide networks have diverse applications in the polymer and pharmaceutical industries. Polynomials and degree-based topological indices have tendencies to correlate properties of molecular graphs.
Hussain Zafar   +5 more
doaj   +1 more source

Reverse Zagreb and Reverse Hyper-Zagreb Indices for Crystallographic Structure of Molecules

open access: yesJournal of Chemistry, 2020
In the fields of chemical graph theory, topological index is a type of a molecular descriptor that is calculated based on the graph of a chemical compound.
Zhen Wang   +3 more
doaj   +1 more source

Relationships Between Generalized Bernoulli Numbers and Polynomials and Generalized Euler Numbers and Polynomials [PDF]

open access: yes, 2002
In this paper, concepts of the generalized Bernoulli and Euler numbers and polynomials are introduced, and some relationships between them are ...
Qi, Feng, Luo, Qiu-Ming
core   +3 more sources

On topological properties of block shift and hierarchical hypercube networks

open access: yesOpen Physics, 2018
Networks play an important role in electrical and electronic engineering. It depends on what area of electrical and electronic engineering, for example there is a lot more abstract mathematics in communication theory and signal processing and networking ...
Guirao Juan Luis García   +2 more
doaj   +1 more source

Skew-orthogonal Laguerre polynomials for chiral real asymmetric random matrices [PDF]

open access: yes, 2010
We apply the method of skew-orthogonal polynomials (SOP) in the complex plane to asymmetric random matrices with real elements, belonging to two different classes. Explicit integral representations valid for arbitrary weight functions are derived for the
Akemann, G   +10 more
core   +5 more sources

Molecular Descriptors of Nanotube, Oxide, Silicate, and Triangulene Networks

open access: yesJournal of Chemistry, 2017
A topological index is a real number associated with chemical constitution purporting for correlation of chemical structure with various physical properties, chemical reactivity, or biological activity.
Wei Gao, Muhammad Kamran Siddiqui
doaj   +1 more source

Recurrence coefficients for discrete orthonormal polynomials and the Painlevé equations [PDF]

open access: yes, 2013
We investigate semi-classical generalizations of the Charlier and Meixner polynomials, which are discrete orthogonal polynomials that satisfy three-term recurrence relations.
Clarkson, Peter
core   +1 more source

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