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Evaluation of Threshold Selection Methods for Adaptive Kernel Density Estimation in Disease Mapping
This article assesses the relative performance of threshold selection methods in terms of resolution and reliability for disease mapping.
Date:
May 8, 2018
Creator:
Ruckthongsook, Warangkana; Tiwari, Chetan; Oppong, Joseph R. & Natesan, Prathiba
System:
The UNT Digital Library
Infinitely Many Solutions for a Semilinear Problem on Exterior Domains With Nonlinear Boundary Condition
This article proves the existence of an infinite number of radial solutions to Δu + K(r)ƒ(u) = 0 with a nonlinear boundary condition on the exterior of the ball of radius R centered at the origin in ℝᴺ.
Date:
May 8, 2018
Creator:
Joshi, Janak & Iaia, Joseph A.
System:
The UNT Digital Library
The universal shape of the X-ray variability power spectrum of AGN up to z ∼ 3
Authors of the article assert that they studied the ensemble X-ray variability properties of active galactic nuclei (AGN) over large ranges of timescale (20 ks ≤ T ≤ 14 yr), redshift (0 ≤ z ≲ 3), luminosity (1040 erg s−1 ≤ LX ≤ 1046 erg s−1), and black hole (BH) mass (106 ≤ M⊙ ≤ 109). The authors show that the data collected from archival observations and previous literature studies are fully consistent with a universal PSD form, which does not show any evidence for systematic evolution of shape or amplitude with redshift or luminosity, even if there may be differences between individual AGN at a given redshift or luminosity.
Date:
May 8, 2023
Creator:
Paolillo, Maurizio; Papadakis, I.; Brandt, William Nielsen; Bauer, Franz E.; Lanzuisi, G.; Allevato, V. et al.
System:
The UNT Digital Library