Results 61 to 70 of about 634 (218)
Magnetic Resonance in Chemistry, Volume 63, Issue 10, Page 768-776, October 2025.Fe (III) complexation induces conformational compaction of humic acid by selectively rigidifying carboxyl and aromatic domains. Solid‐state 13C NMR relaxation (TCH and T₁ρ[H]) reveals domain‐specific dynamics, supporting a supramolecular model, where Fe (III) acts as a molecular cross‐linker in natural organic matter.
Pellegrino Conte, Calogero Librici
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New quantum estimates in the setting of fractional calculus theory
Advances in Difference Equations, 2020 In this article, the investigation is centered around the quantum estimates by utilizing quantum Hahn integral operator via the quantum shift operator ψ q η ( ζ ) = q ζ + ( 1 − q ) η ${}_{\eta}\psi_{\mathfrak{q}}(\zeta)=\mathfrak{q}\zeta+(1-\mathfrak{q})\
Saima Rashid +4 more
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Discrete Bernstein bases and Hahn polynomials
Journal of Computational and Applied Mathematics, 1993 Hahn polynomials are orthogonal with respect to a discrete scalar product. The paper investigates the representation of Hahn polynomials in discrete Bernstein bases of various degree defined on different intervals of integers. Basic tools are degree evaluation and subdivision algorithms.
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Advancing causal inference in ecology: Pathways for biodiversity change detection and attribution
Methods in Ecology and Evolution, Volume 16, Issue 10, Page 2276-2304, October 2025.Abstract Understanding the causes of biodiversity change is essential for addressing environmental challenges. While causal attribution has advanced in other fields, ecologists remain cautious about causal claims or misinterpret predictive models as causal.
Franziska Schrodt +18 more
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Distillation Column Simulation by Orthogonal Collocation: Efficient Solution Strategy
Journal of King Saud University: Engineering Sciences, 1993 A reduced-order collocation method (using Jacobi or Hahn polynomials) is used for the simulation of distillation columns. A new solution strategy which uses the overall balances and equilibrium relations to eliminate the need to include the vapour flows ...
K.M. Wagialla, M.A. Soliman
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A difference equation and Hahn polynomials in two variables [PDF]
Pacific Journal of Mathematics, 1981 The space of polynomials in N variables spanned by squarefree monomials of degree r and annihilated by Σ?=ιd/dXi furnishes an irreducible representation of SN, the symmetric group on N objects. The elements of this space, which are invariant under permutations leaving the sets {xu •••, xa} and {xa+u •••> Xa+b} (a + b < N) fixed, correspond to solutions
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Journal of Applied Econometrics, Volume 40, Issue 6, Page 608-626, September/October 2025.ABSTRACT This paper introduces a generalized model of peer effects for binary outcomes, based on a network game that accounts for strategic complementarity (influence of the number of peers that select the same action) and conformity to social norms (penalizing deviations from the average peers' action).
Mathieu Lambotte
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Laguerre–Hahn orthogonal polynomials on the real line [PDF]
Random Matrices: Theory and Applications, 2019 A survey is given on sequences of orthogonal polynomials related to Stieltjes functions satisfying a Riccati type differential equation with polynomial coefficients — the so-called Laguerre–Hahn class. The main goal is to describe analytical aspects, focusing on differential equations for those orthogonal polynomials, difference and differential ...
M. N. Rebocho, M. N. Rebocho
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Journal of Biogeography, Volume 52, Issue 9, September 2025.ABSTRACT Aim How communities of organisms come together has long fascinated scientists, with renewed interest in using functional and evolutionary patterns to infer mechanisms of community assembly. Ecological theory predicts that biotic interactions could lead to either divergence in the event of niche partitioning or convergence through the exclusion
Nestor E. Bosch +6 more
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The effect of result‐based agri‐environmental payments on biodiversity: Evidence from Switzerland
American Journal of Agricultural Economics, Volume 107, Issue 4, Page 1228-1254, August 2025.Abstract We estimate the effects of result‐based agri‐environmental payments on biodiversity using a unique dataset containing information about plant vegetation. The data include information on surveyed plant species for a large number of randomly selected plots followed over a period of 20 years in Switzerland.
Sergei Schaub, Tobias Roth, Petyo Bonev
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