Results 71 to 80 of about 619 (209)
Small, Volume 21, Issue 21, May 26, 2025.NMR cryoporometry allows for the determination of nanopore diameters in wet polymer gels. Pore shrinkage upon thermal drying of the gels is precisely gauched and related to parameters used for the synthesis of polymer gel. The data show that sufficiently high monomer concentrations can completely mitigate pore size reduction upon drying.
Abdurrahman Bilican +2 more
wiley +1 more source
On the spectrum of tridiagonal matrices with two-periodic main diagonal
Special MatricesWe find the spectrum and eigenvectors of an arbitrary irreducible complex tridiagonal matrix with two-periodic main diagonal. This is expressed in terms of the spectrum and eigenvectors of the matrix with the same sub- and superdiagonals and zero main ...
Dyachenko Alexander, Tyaglov Mikhail
doaj +1 more source
American Journal of Agricultural Economics, Volume 107, Issue 3, Page 725-751, May 2025.Abstract The literature is replete with valuations of the costs and benefits of environmental change, yet the issue of where those impacts fall across society is rarely considered. This is a significant knowledge gap given clear evidence of social preferences regarding distributional effects reflected in both policy and protest.
Michela Faccioli +3 more
wiley +1 more source
Constructing bispectral dual Hahn polynomials
Journal of Approximation Theory, 2015 Using the concept of $\mathcal{D}$-operator and the classical discrete family of dual Hahn, we construct orthogonal polynomials $(q_n)_n$ which are also eigenfunctions of higher order difference operators.
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Reasoning to Justify Eating Animals Varies With Age
Child Development, Volume 96, Issue 3, Page 953-965, May/June 2025.ABSTRACT The present study examined the justifications used by children, adolescents, and adults to justify eating animals. Children (n = 100, Mage = 9.82, SD = 0.77, female n = 49) as compared to adolescents (n = 76, Mage = 14.0, SD = 1.62, female n = 36) and adults (n = 113, Mage = 44.1, SD = 14.4, female n = 54) were more ambivalent or opposed to ...
Luke McGuire +4 more
wiley +1 more source
On Jacobi and continuous Hahn polynomials
, 1994 Jacobi polynomials are mapped onto the continuous Hahn polynomials by the Fourier transform and the orthogonality relations for the continuous Hahn polynomials then follow from the orthogonality relations for the Jacobi polynomials and the Parseval formula.
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The Granger–Johansen representation theorem for integrated time series on Banach space
Journal of Time Series Analysis, Volume 46, Issue 3, Page 432-457, May 2025.We prove an extended Granger–Johansen representation theorem (GJRT) for finite‐ or infinite‐order integrated autoregressive time series on Banach space. We assume only that the resolvent of the autoregressive polynomial for the series is analytic on and inside the unit circle except for an isolated singularity at unity.
Phil Howlett +4 more
wiley +1 more source
Discrete Bernstein bases and Hahn polynomials
Journal of Computational and Applied Mathematics, 1993 Abstract In this paper, we study the representation and evaluation of Hahn polynomials in discrete Bernstein bases of various degrees defined on different intervals of integers. Basic tools are degree elevation and subdivision algorithms. They only involve linear convex combinations with simple rational coefficients and are numerically stable.
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Deformed su(1,1) Algebra as a Model for Quantum Oscillators
Symmetry, Integrability and Geometry: Methods and Applications, 2012 The Lie algebra su(1,1) can be deformed by a reflection operator, in such a way that the positive discrete series representations of su}(1,1) can be extended to representations of this deformed algebra su(1,1)_gamma.
Elchin I. Jafarov +2 more
doaj +1 more source
Fast and stable computation of higher-order Hahn polynomials and Hahn moment invariants for signal and image analysis. [PDF]
Multimed Tools Appl, 2021 Daoui A +3 more
europepmc +1 more source