Texas Tech University

Portfolio Optimization for Commodity ETFs Under Heavy-Tailed Returns

This paper examined whether portfolio-objective choice or forecasting complexity was more consequential in heavy-tailed commodity ETF allocation. Using daily Bloomberg data for 30 U.S.-listed commodity ETFs from 12 December 2018 to 16 December 2024, we compared historical and dyn...

Reproducibility, Replicability, and Research Quality in Homogeneous Catalysis

Abstract Researchers from all sectors of homogeneous catalysis convened in response to concerns regarding reproducibility in science to analyze the issue and provide recommendations. In addition to an in-person workshop, the group engaged the broader homogeneous catalysis communi...

Impact pathway: beyond automation and augmentation – a relational ontology of AI in operations and supply chain management

Purpose As companies deploy increasingly agentic forms of AI to coordinate and manage workflows, AI can no longer be understood as a discrete technological tool added to existing operations and supply chains. We propose a relational ontology as an alternative theoretical foundati...

Intravascular ultrasound–guided versus angiography-guided endovascular interventions for peripheral artery disease: a systematic review and meta-analysis

Abstract Background Endovascular revascularization is a cornerstone therapy for peripheral artery disease (PAD), typically guided by angiography, which may underestimate vessel size and lesion complexity. The clinical benefit of intravascular ultrasound (IVUS) guidance remains un...

Interpretable Modeling of Driver Attention Shifts with a Vision–Language Model

Driver gaze is commonly modeled as a spatial heatmap, but heatmaps alone are difficult for humans to interpret because they do not explain which road object or region is being monitored or why an attention shift may matter. This study examines whether minimal human-grounded super...

Reversing the Vigilance Decrement: Effects of a Late Modality Switch on Detection Performance

When people monitor rare signals for sustained periods, detection performance declines over time (vigilance decrement). In applied settings this decline can lead to missed critical signals. Prior research examined whether changing display modalities would improve detection after...

Dual Nickel/Photoredox‐Catalyzed Regio‐ and Enantioselective Alkenylation of Epoxides

ABSTRACT β ‐Chiral phenethyl alcohols represent a privileged scaffold in bioactive molecules, chemical probes, and functional materials, serving as versatile synthons in organic synthesis. Herein, we report the first Ni/photoredox‐catalyzed stereoconvergent C(sp 3 )−C(sp 2 ) cros...

Millimeter-wave directed energy-mediated neural cell injury: insights into protein degradation and cell injury mechanisms

Background: Millimeter-wave directed energy (mmWave DE) is increasingly used in telecommunications and military applications, yet its biological effects on neuronal systems remain unclear. To characterize the spatially dependent cellular and molecular impacts of 34.14 GHz mmWave...

The Myelin Sheath as a Multilamellar Electromechanical System: Bilayer Stack Analogs, Energy Buffering, and Biological Memory

The myelin sheath has traditionally been viewed as a passive electrical insulator that accelerates nerve impulse propagation. Recent experimental studies, however, indicate that myelin is a dynamic biological material whose structure and hydration state adapt to neuronal activity...

A Weierstrass-Type Representation for Maximal Surfaces in the Five-Dimensional Minkowski Space ℝ15

We develop a Weierstrass-type representation for conformal maximal surfaces in the five-dimensional Minkowski space [Formula: see text]. The construction extends the classical representation theory for maximal surfaces in [Formula: see text] and its higher-codimensional analogues...

On the productivity of length-based alternations in Xhosa noun class prefixes

Noun classes in isiXhosa are each associated with specific prefixes on the noun stem. Some of these noun class prefixes exhibit length-based allomorphy: they take one form before multisyllabic stems and a different, longer form before stems that are monosyllabic. Specifically, cl...

A Decay Rate for Steady Guaranteed In‐Control Performance in Statistical Process Control Models With Cautious Parameter Learning

ABSTRACT Control charts with parameter estimates from small Phase I samples are at risk of providing inaccurate signals due to poor model fit. In turn, Guaranteed In‐Control Performance (GICP) approaches were introduced to account for the resulting variability in the conditional...

Evaluating Driver Perception of Truck Platoon Speeds During Intersection Approaches

Truck platoons are groups of trucks traveling in a tight single-file formation to reduce aerodynamic drag. Because air resistance accounts for a substantial portion of truck fuel consumption, platooning can improve efficiency and reduce fuel use. However, little is known about ho...

Verification-Conditioned Abstention: Withholding Unverifiable Claims in Labor-Market Decision Support

Selective prediction, learning to defer, and conformal methods all condition the decision to abstain on the model’s estimate of its own correctness. We define and deploy an alternative. In verification-conditioned abstention the selection function is a decidable predicate over an...

Verification-Conditioned Abstention: Withholding Unverifiable Claims in Labor-Market Decision Support

Selective prediction, learning to defer, and conformal methods all condition the decision to abstain on the model’s estimate of its own correctness. We define and deploy an alternative. In verification-conditioned abstention the selection function is a decidable predicate over an...

σ-Hole Engineering Enables Selective Supramolecular Isomer Formation in Sb(III) Hosts

Abstract Pnictogen bonding (PnB) has emerged as a directional and tunable noncovalent interaction, yet the presence of multiple σ-holes on trivalent pnictogen centers introduces a question: can individual σ-holes be selectively addressed for binding, and do their relative reactiv...

Time-dependent divergence in infection risks among patients with multiple sclerosis treated with fumarates versus anti-CD20 monoclonal antibodies

Background: People with multiple sclerosis (pwMS) treated with anti-CD20 monoclonal antibodies have an elevated infection risk, yet long-term comparative data with oral fumarates are limited. Objective: To compare infection incidence, healthcare resource utilization, and relapse...

Antibody–Drug Conjugates in Contemporary Oncology: A Clinical Perspective on Dose Optimization, Sequencing, and Combination Strategies

Antibody–drug conjugates (ADCs) have matured from a technically challenging concept into an established therapeutic platform across hematologic and solid malignancies. By linking a monoclonal antibody to a potent cytotoxic payload, ADCs seek to increase tumor-directed drug delive...

Narrative Cues Guide Visual Attention in 360-Degree News Video

This study uses eye-tracking to assess gaze behavior in a 360-degree video environment and test the impact of narration and audiovisual correspondence on visual search and scene guidance. The analysis showed how viewers divided attention between specific visual targets denoted by...

Writing for the Pipe Organ: Guide for Composers | Chapter 2_1

A practical guide to organ registration for composers unfamiliar with the instrument, explaining foot pitch, manuals, and stop timbres through intuitive sound-based descriptions.