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Exploratory X-Ray Monitoring of Luminous Radio-quiet Quasars at High Redshift: No Evidence for Evolution in X-Ray Variability
This article reports on the second installment of an X-ray monitoring project of seven luminous radio-quiet quasars (RQQs).
Date:
October 10, 2017
Creator:
Shemmer, Ohad; Brandt, William Nielsen; Paolillo, Maurizio; Kaspi, Shai; Vignali, Christian; Lira, Paulina et al.
System:
The UNT Digital Library
Existence of Solutions for Sublinear Equations on Exterior Domains
This article proves the existence of an infinite number of radial solutions of Δu+K(r)ƒ(u) = 0, one with exactly n zeros for each nonnegative integer n on the exterior of the ball of radius R > 0, Bʀ, centered at the origin in ℝᴺ with u = 0 on ∂Bʀ and limᵣ→∞u(r) = 0 where N > 2, f is odd with ƒ < 0 on (0; β), ƒ > 0 on (β;∞), ƒ(u) ~ uᵖ with 0 < p < 1 for large u and K(r) ~ r-α with 0 < α < 2 for large r.
Date:
October 10, 2017
Creator:
Iaia, Joseph A.
System:
The UNT Digital Library
Revision and Extension of a Generally Applicable Group-Additivity Method for the Calculation of the Standard Heat of Combustion and Formation of Organic Molecules
Article presenting the calculation of the heats of combustion ΔH°c and formation ΔH°f of organic molecules at standard conditions using a commonly applicable computer algorithm based on the group-additivity method. This work is a continuation and extension of an earlier publication.
Date:
October 10, 2021
Creator:
Naef, Rudolf & Acree, William E. (William Eugene)
System:
The UNT Digital Library
Tuning the decay of sound in a viscous metamaterial
Authors of the article use analytical results for viscous dissipation in phononic crystals to calculate the decay coefficient of a sound wave propagating at low frequencies through a two-dimensional phononic crystal with a viscous fluid background. They claim that the decay coefficient exhibits dependence on the direction of propagation; that is, a homogenized phononic crystal behaves like an anisotropic viscous fluid.
Date:
October 10, 2022
Creator:
Ibarias, M.; Doporto, J.; Krokhin, Arkadii A. & Arriaga, J.
System:
The UNT Digital Library
Biophotons: New Experimental Data and Analysis
Article describes how biophotons are an ultra-weak emission of photons in the visible energy range from living matter. The authors study the emission from germinating seeds using an experimental technique designed to detect light of extremely small intensity.
Date:
October 10, 2023
Creator:
Benfatto, Maurizio; Pace, Elisabetta; Davoli, Ivan; Francini, Roberto; Matteis, Fabio De; Scordo, Alessandro et al.
System:
The UNT Digital Library