Descriptive Complexity in Cantor Series (open access)

Descriptive Complexity in Cantor Series

Article discusses how a Cantor series expansion for a real number x with respect to a basic sequence Q=(q), where qi≥2, is a generalization of the base b expansion to an infinite sequence of bases. The authors show that for any basic sequence the set of distribution normal numbers is Π03-complete, and if Q is 1-divergent then the sets of normal and ratio normal numbers are Π03-complete.
Date: September 27, 2021
Creator: Airey, Dylan; Jackson, Steve & Mance, Bill
System: The UNT Digital Library
Role of ribosomal RNA released from red cells in blood coagulation in zebrafish and humans (open access)

Role of ribosomal RNA released from red cells in blood coagulation in zebrafish and humans

This article identifies that an rRNA released in hemolysis activates clotting in human and zebrafish plasma. Furthermore, it shows that fish Hgfac plays a role in rRNA-mediated activation of coagulation.
Date: November 17, 2021
Creator: Alharbi, Abdulmajeed; Iyer, Neha; Al Qaryoute, Ayah; Raman, Revathi; Burks, David J.; Azad, Rajeev K. et al.
System: The UNT Digital Library
A random walk version of Robbins' problem: small horizon (open access)

A random walk version of Robbins' problem: small horizon

This article considers an analogous problem in which the observed random variables are the steps of a symmetric random walk. Assuming continuously distributed step sizes, it describes the optimal stopping rules for the cases n = 2 and n = 3 in two versions of the problem: a "full information" version in which the actual steps of the random walk are disclosed to the decision maker; and a "partial information" version in which only the relative ranks of the positions taken by the random walk are observed. When n = 3, the optimal rule and expected rank depend on the distribution of the step sizes. The authors give sharp bounds for the optimal expected rank in the partial information version, and fairly sharp bounds in the full information version.
Date: November 17, 2018
Creator: Allaart, Pieter C. & Allen, Andrew
System: The UNT Digital Library
Foias Numbers (open access)

Foias Numbers

This article identifies the principal features in Foias’ original proof and streamlines them into a general result. The result gives further evidence to the observation that the connection between the sequence with initial seed the Foias constant and the Prime Number Theorem must be fortuitous.
Date: December 30, 2018
Creator: Anghel, Nicolae
System: The UNT Digital Library
The spectrum of two interesting stochastic matrices (open access)

The spectrum of two interesting stochastic matrices

Article discusses the determination of the spectrum of two interesting stochastic matrices appearing in an engineering paper.
Date: January 21, 2020
Creator: Anghel, Nicolae
System: The UNT Digital Library
Square Roots of Real 3 x 3 Matrices vs. Quartic Polynomials with Real Zeros (open access)

Square Roots of Real 3 x 3 Matrices vs. Quartic Polynomials with Real Zeros

Article on the analogy between the description of the real square roots of 3x3 matrices and the zeros of the (depressed) real quartic polynomial, using the Cayley-Hamilton theorem.
Date: November 2017
Creator: Anghel, Nicolae
System: The UNT Digital Library
Parametric nondifferentiable multiobjective fractional programming under (b;Ψ; Φ; ρ)-univexity (open access)

Parametric nondifferentiable multiobjective fractional programming under (b;Ψ; Φ; ρ)-univexity

This article is concerned with optimality conditions and duality results for nondifferentiable multi-objective fractional programming problems.
Date: September 27, 2018
Creator: Antczak, Tadeusz & Verma, Ram U.
System: The UNT Digital Library
Environmental vibrios represent a source of antagonistic compounds that inhibit pathogenic Vibrio cholerae and Vibrio parahaemolyticus strains (open access)

Environmental vibrios represent a source of antagonistic compounds that inhibit pathogenic Vibrio cholerae and Vibrio parahaemolyticus strains

This article predicts that marine-derived bacteria should inhibit Vibrio pathogens and may be a source of unique antibiotic compounds.
Date: March 10, 2017
Creator: Burks, David J.; Norris, Stephen; Kauffman, Kathryn M.; Joy, Abigail; Arevalo, Philip; Azad, Rajeev K. et al.
System: The UNT Digital Library
Lipophilic signals lead to organ-specific gene expression changes in Arabidopsis seedlings (open access)

Lipophilic signals lead to organ-specific gene expression changes in Arabidopsis seedlings

Article presents a study where whole transcriptome sequencing (RNA-seq) and differential expression analysis were used to identify early (1–3 hr) transcriptional changes induced by the exogenous treatment of NAE 18:2 and NAE 18:3 in cotyledons, roots, and seedlings.
Date: July 15, 2020
Creator: Cannon, Ashley E.; Yan, Chengshi; Burks, David J.; Rao, Xiaolan; Azad, Rajeev K. & Chapman, Kent Dean
System: The UNT Digital Library
Gene-based association tests using GWAS summary statistics and incorporating eQTL (open access)

Gene-based association tests using GWAS summary statistics and incorporating eQTL

Article proposes a powerful and computationally efficient gene-based association test, called Overall. Using extended Simes procedure, Overall aggregates information from three types of traditional gene-based association tests and also incorporates expression quantitative trait locus (eQTL) information into a gene-based association test using GWAS summary statistics. The results show that this newly developed method can identify more significant genes than other methods.
Date: March 3, 2022
Creator: Cao, Xuwei; Wang, Xuexia; Zhang, Shuanglin & Sha, Qiuying
System: The UNT Digital Library
Local and Systemic Metabolic Responses during Light-Induced Rapid Systemic Signaling (open access)

Local and Systemic Metabolic Responses during Light-Induced Rapid Systemic Signaling

This article reports that local application of light stress to one rosette leaf of bolting Arabidopsis (Arabidopsis thaliana) plants resulted in a metabolic response that encompassed local, systemic and transport tissues, demonstrating a high degree of physical and metabolic continuity between different tissues throughout the plant.
Date: December 2018
Creator: Choudhury, Feroza K.; Devireddy, Amith R.; Azad, Rajeev K.; Shulaev, Vladimir & Mittler, Ron
System: The UNT Digital Library
Badly approximable points on self-affine sponges and the lower Assouad dimension (open access)

Badly approximable points on self-affine sponges and the lower Assouad dimension

This article highlights a connection between Diophantine approximation and the lower Assouad dimension by using information about the latter to show that the Hausdorff dimension of the set of badly approximable points that lie in certain non-conformal fractals, known as self-affine sponges, is bounded below by the dynamical dimension of these fractals. The results, which are the first to advance beyond the conformal setting, encompass both the case of Sierpiński sponges/carpets (also known as Bedford–McMullen sponges/carpets) and the case of Barański carpets.
Date: June 20, 2017
Creator: Das, Tushar; Fishman, Lior; Simmons, David & Urbański, Mariusz
System: The UNT Digital Library
Model checking via testing for direct effects in Mendelian Randomization and transcriptome-wide association studies (open access)

Model checking via testing for direct effects in Mendelian Randomization and transcriptome-wide association studies

This article proposes a new and general goodness-of-fit (GOF) test, called TEDE (TEsting Direct Effects), applicable to both correlated and independent SNPs/IVs as commonly used in transcriptome-wide association studies (TWAS) and Mendelian randomization (MR) respectively.
Date: August 2, 2021
Creator: Deng, Yangqing & Pan, Wei
System: The UNT Digital Library
Duals of Tirilman spaces have unique subsymmetric basic sequences (open access)

Duals of Tirilman spaces have unique subsymmetric basic sequences

Article describes how the Tirilman spaces were introduced by Casazza and Shura as variations of the spaces constructed by Tzafriri. We prove that all subsymmetric basic sequences in the dual space are equivalent to its canonical subsymmetic but not symmetric basis.
Date: September 5, 2023
Creator: Dilworth, Steven J.; Kutzarova, Denka; Sari, Bünyamin & Stankov, Svetozar
System: The UNT Digital Library
Dense Locally Finite Subgroups of Automorphism Groups of Ultraextensive Spaces (open access)

Dense Locally Finite Subgroups of Automorphism Groups of Ultraextensive Spaces

Article verifying a conjecture of Vershik by showing that Hall’s universal countable locally finite group can be embedded as a dense subgroup in the isometry group of the Urysohn space and in the automorphism group of the random graph. It shows the same for all automorphism groups of known infinite ultraextensive spaces.
Date: August 18, 2021
Creator: Etedadialiabadi, Mahmood; Gao, Su; Le Maître, François & Melleray, Julien
System: The UNT Digital Library
MYB30 Orchestrates Systemic Reactive Oxygen Signaling and Plant Acclimation (open access)

MYB30 Orchestrates Systemic Reactive Oxygen Signaling and Plant Acclimation

This article explores the relationship among MYB30, the ROS wave, and systemic acclimation in Arabidopsis by determining the SAA response to HL stress of MYB30 mutants and wild-type plants.
Date: July 22, 2020
Creator: Fichman, Yosef; Zandalinas, Sara I.; Sengupta, Soham; Burks, David J.; Meyers, Ronald J., Jr.; Azad, Rajeev K. et al.
System: The UNT Digital Library
Uniformly de Bruijn Sequences and Symbolic Diophantine Approximation on Fractals (open access)

Uniformly de Bruijn Sequences and Symbolic Diophantine Approximation on Fractals

Article expanding the Intrinsic Diophantine approximation on fractals first proposed by K. Mahler (1984). This article describes and develops the theory of infinite de Bruijn sequences and answers questions related to Hausdorff dimension, Diophantine approximation, Dirichlet function, and height function.
Date: April 27, 2018
Creator: Fishman, Lior; Merrill, Keith & Simmons, David
System: The UNT Digital Library
Topological mixing properties of rank‐one subshifts (open access)

Topological mixing properties of rank‐one subshifts

Article describes study examining the topological mixing properties and the maximal equicontinuous factor of rank‐one subshifts as topological dynamical systems
Date: February 7, 2019
Creator: Gao, Su & Ziegler, Caleb
System: The UNT Digital Library
Universality in a one-dimensional three-body system (open access)

Universality in a one-dimensional three-body system

Article studying a heavy-heavy-light three-body system confined to one space dimension.
Date: July 24, 2019
Creator: Happ, Lucas; Zimmermann, Matthias; Betelu, Santiago I.; Schleich, Wolfgang P. & Efremov, Maxim A.
System: The UNT Digital Library
Existence and nonexistence of radial solutions for semilinear equations with bounded nonlinearities on exterior domains (open access)

Existence and nonexistence of radial solutions for semilinear equations with bounded nonlinearities on exterior domains

Article studies radial solutions of ∆u + K(r)f(u) = 0 on the exterior of the ball of radius R > 0 centered at the origin in ℝᶰ where f is odd with f < 0 on (0, β), f > 0 on (β, δ), f ≡ 0 for u > δ, and where the function K(r) is assumed to be positive and K(r) → 0 as r → ∞.
Date: December 1, 2020
Creator: Iaia, Joseph A.
System: The UNT Digital Library
Existence and Nonexistence of Solutions for Sublinear Equations on Exterior Domains (open access)

Existence and Nonexistence of Solutions for Sublinear Equations on Exterior Domains

This article studies radial solutions of Δu + K(r)ƒ(u) = 0 on the exterior of the ball of radius R > 0, BR, centered at the origin in ℝN with u = 0 on @BR where ƒ is odd with ƒ < 0 on (0; β), ƒ > 0 on (β;∞), f(u) ~ uᵖ with 0 < p < 1 for large u and K(r) ~ r⁻ᵅ for large r.
Date: September 13, 2017
Creator: Iaia, Joseph A.
System: The UNT Digital Library
Existence of Infinitely Many Solutions for Singular Semilinear Problems on Exterior Domains (open access)

Existence of Infinitely Many Solutions for Singular Semilinear Problems on Exterior Domains

Article proving the existence of infinitely many radial solutions of ∆𝓊+𝐾(𝓇) ƒ (𝓊) = 0 on the exterior of the ball of radius R > 0, BR, centered at the origin in ℝᴺ with u = 0 on ∂BR and lim/r→∞ 𝓊(𝓇) = 0 where N > 2, f is odd with f < 0 on (0, β), f > 0 on (β, ∞), f is superlinear for large u, ƒ(𝓊) ∼ −1/(|𝓊|𝘲⁻¹𝓊) with 0 < q < 1 for small u, and 0 < 𝐾(𝓇) ≤ 𝐾₁/r∝ with 𝑁 + q(𝑁 − 2) < ∝ < 2(𝑁− 1) for large r.
Date: March 9, 2018
Creator: Iaia, Joseph A.
System: The UNT Digital Library
Existence of solutions for semilinear problems on exterior domains (open access)

Existence of solutions for semilinear problems on exterior domains

Article proves the existence of an infinite number of radial solutions to ∆u+K(r)f(u) = 0 on ℝᶰ such that limᵣ →∞ u(r) = 0 with prescribed number of zeros on the exterior of the ball of radius R > 0 where f is odd with f < 0 on (0, β), f > 0 on (β, ∞) with f superlinear for large u, and K(r) ∼ r ⁻ᵅ with α > 2(N − 1).
Date: April 15, 2020
Creator: Iaia, Joseph A.
System: The UNT Digital Library
Existence of Solutions for Sublinear Equations on Exterior Domains (open access)

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