Universidade Federal da Paraíba

Machine learning survival models for colorectal cancer: advantages of random survival forests over classification algorithms

Colorectal cancer remains a major cause of cancer-related mortality worldwide, motivating the development of accurate prognostic models. Despite advances in machine learning for survival prediction, a common practice in the literature reformulates time-to-event outcomes as binary...

One-loop contributions in Lorentz-violating scalar QED with nonminimal coupling

Abstract In the context of perturbative aspects of Lorentz-violating theories, we study the divergent one-loop two-point functions of a Lorentz-violating (LV) extension of scalar QED containing a dimension-five CPT-odd nonminimal coupling. The model is defined through a generaliz...

Macroecological invisibility in apple snails (Gastropoda: Ampullariidae): uneven occurrence and molecular coverage across public repositories

Abstract Apple snails (Ampullariidae) are freshwater gastropods of ecological and economic importance, but their digital representation remains uneven across taxa, regions and data types. Using a 171-species taxonomic reference, we integrated global occurrence and molecular data...

Sexual dimorphism of the human calcaneus: a cross-sectional morphometric study

Sex estimation from skeletal remains is a fundamental step in forensic anthropology. The calcaneus, the largest tarsal bone, is robust and may serve as an alternative indicator when the skull and pelvis are unavailable. This study evaluated sexual dimorphism in the calcaneus of a...

Mapping the IntermolecularInteraction Landscape ina New Nicotinamide–Undecanoic Acid Cocrystal: SupramolecularStructure, Spectroscopic Analyses, and Computational Studies

Abstract A novel cocrystal composed of nicotinamide (NA) and undecanoic acid (UA) in a 1:1 stoichiometry has been successfully synthesized via slow evaporation and comprehensively characterized through a multidisciplinary approach combining experimental and computational methods....

Investor sentiment, IFRS and market mispricing in emerging economies

Purpose This study investigates whether the adoption of International Financial Reporting Standards (IFRS) moderates the relationship between investor sentiment, both local and global, and subsequent asset returns in emerging markets. We explore whether IFRS adoption mitigates th...

Black Hole Gravitational Phenomena in Higher-Order Curvature–Scalar Gravity

This work aims to explore the gravitational consequences of a recently proposed black hole solution previously introduced, which incorporates quantum gravitational corrections of General Relativity. We initiate our analyses by taking into account the horizon structure, focusing o...

DNA detection of Babesia bovis in sheep, ticks and cattle during an outbreak of sheep ixodidiosis by Rhipicephalus microplus

This study describes, for the first time, the molecular and phylogenetic detection of Babesia bovis in sheep, with concurrent detection in cattle and R. microplus ticks during a severe tick infestation outbreak in northeastern Brazil. The affected herd, located in São Pedro, Rio...

The Zooplankton International Geospatial dataset: A global repository of spatiotemporal freshwater zooplankton community composition data from lakes and reservoirs to support ecological research

Abstract Zooplankton transfer substantial energy in aquatic food webs and are used as indicators of environmental change. Syntheses of zooplankton community dynamics globally require datasets that span a wide range of environmental gradients; however, these datasets are limited d...

From Fragmented DMD Management Toward Digitally Enabled Circularity: A Conceptual Operations Framework for Durable Medical Devices

Durable medical devices (DMD) are essential healthcare assets, yet their management in public hospitals is constrained by fragmentation, limited traceability, reactive maintenance, and weak lifecycle integration. This study proposes a framework for digitally enabled, sustainable,...

Modulation of Advanced Glycation End Products and Oxidative Stress by Hesperetin-7-O-Glucoside and Diosmetin-7-O-Glucoside Complexed with Cyclodextrins

Background/Objectives: Chronic complications of diabetes mellitus are closely associated with increased oxidative stress and the formation of advanced glycation end products (AGEs). This study aimed to investigate the antioxidant and antiglycation potential of hesperetin-7-O-gluc...

Biodegradable pectin films incorporating purple sweet potato anthocyanins for real-time shrimp freshness monitoring

This study aimed to develop biodegradable films using pectin extracted from orange peel residues, purple sweet potato extract, and glycerol, with potential application for monitoring shrimp freshness. The physical, barrier, mechanical, bioactive, antioxidant, morphological, struc...

Mapping the Bioenergetic Landscape of Oral Cancer Stem Cells: A Systematic Review

ABSTRACT Objectives Oral squamous cell carcinoma (OSSC) remains highly lethal, with resistance largely driven by cancer stem cells (CSCs). Mitochondrial reprogramming supports CSC redox control, self‐renewal, and survival. This systematic review aimed to synthesize mitochondrial...

Hepatic encephalopathy associated with extensive hepatic diaphragmatic herniation in an adult horse

Abstract Background Diaphragmatic hernia in horses is a rare condition, most commonly presenting with signs of colic and, less frequently, respiratory compromise. Hepatic herniation through a diaphragmatic defect with secondary hepatic failure and encephalopathy has rarely been d...