Universidade Federal do Paraná

Application of Machine Learning for Defect Mitigation and Roughness Estimation in EHLA AM Process

Abstract This study presents a data-driven methodology for optimizing Extreme High-Speed Laser Cladding (EHLA) processing parameters with the aim of identifying defect-free conditions and controlling surface roughness. The proposed approach combines experimental analysis, machine...

Construct or modify this is the question: the relevance of retouch between final Lower Palaeolithic and early Middle Palaeolithic

Great attention has always been paid to the presence of retouched tools as chrono-cultural proxies in prehistoric lithic assemblages; since the last century typological lists have been traditionally used to summarize the morphological variability shown by the European Palaeolithi...

Phytochemical Screening and Protective Effects of Hancornia speciosa Leaf Extract Against Fatty Acid-Induced Lipotoxicity in HepG2 Cells

Hepatic steatosis is the hallmark of metabolic dysfunction-associated steatotic liver disease (MASLD), the most prevalent chronic liver disease worldwide. Lipotoxicity, resulting from excessive accumulation of fatty acids and bioactive lipid intermediates, is associated with incr...

Assessing the Potential of Gabiroba Fruit Waste as an Oil Source via Ultrasound-Assisted Extraction: Physicochemical Parameters, Chemical Profile, and Biological Properties

This study aimed to evaluate the impact of ultrasound-assisted extraction (UAE) on the chemical composition and biological activities of gabiroba waste oil (GWO), compared to conventional Soxhlet extraction (SE). GWO was characterized for carotenoid content and analyzed by GC-MS...

From geographic coverage to climatic representativeness: protected areas, environmental fragmentation, and species risk under climate change

Conservation assessments usually evaluate protected areas and species risk in geographic space, yet biodiversity is also structured by the availability and spatial configuration of environmental conditions. This study uses environmental space as a broad-grain diagnostic framework...

Laboratory Testing at the End of Life in Patients With Cancer: A Systematic Review of Utilization, Costs, Clinical Utility, and Patient Burden

Background Laboratory tests can identify reversible causes of distress near the end of life, but how often they are ordered does not by itself show whether they improve care. Objective To synthesize evidence on laboratory testing near the end of life in cancer, including utilizat...

Antifungal Activity of Essential Oils from Five Piper Species against Botrytis cinerea from Strawberry

Abstract Strawberry (Fragaria × ananassa Duch.) is susceptible to several fungal diseases, such as gray mold, caused by Botrytis cinerea, that compromise fruits during and after harvest. Disease control usually involves synthetic fungicides; however, the frequent selection of iso...

Mixture design optimization of Nile tilapia (Oreochromis niloticus) pâté formulated with mechanically separated meat: integration of sensory acceptance and formulation cost

Abstract A significant portion of aquatic food industry by-products is still directed to low-value applications, even though they have technological potential for food products, such as mechanically separated meat (MSM) in emulsified products. This study optimised theformulation...

The first annotated checklist of the bees of Colombia reveals an overlooked diversity and areas with major data deficiencies

Background Most existing knowledge about bee biodiversity comes from temperate regions, where diversity is presumed highest—yet substantial data gaps across the tropics confound this pattern. Checklists are critical for documenting species presence, identifying knowledge gaps, an...

Temporal and conceptual variability of chart datum based on harmonic constants: a case study for Ilha Fiscal

Abstract This study evaluates chart datum (CD) variability considering sea-level record length and the datum concept adopted. A 1989–2021 tide-gauge record from Ilha Fiscal, Rio de Janeiro, was analysed using multiple series and three CD concepts: approximately Mean Low Water Spr...

Multi-GNSS clock combination for PPP with an epoch-wise clock alignment and variance component estimation

Abstract Applications of Global Navigation Satellite Systems (GNSS) for positioning, navigation, and timing rely on precise orbit and satellite clock corrections provided by multiple Analysis Centers (ACs) of the International GNSS Service (IGS). To address modeling errors and da...

Shear‐Induced Network Organization and Enhanced Directional Electrical Transport in Blade‐Coated Single‐Walled Carbon Nanotubes Films

Single‐walled carbon nanotube (SWCNT) films are promising transparent conductors for flexible and optoelectronic devices, although achieving a suitable balance between optical transparency and electrical conductivity using scalable deposition methods remains challenging. Here, SW...

Computational Design of Three-Dimensional Nitrogenated Holey Graphene Structures with Phase-Dependent Optoelectronic Properties

Abstract In this work, we propose and comprehensively characterize two novel three-dimensional nitrogenated holey graphene (3D-NHG) structures, designated as the α and β phases. These architectures are predicted through a computational protocol based on the controlled compression...

Ground Vibration and Air Overpressure Prediction Caused by Blasting Operations in a Gneiss Quarry Using a Gene Expression Programming Approach

Abstract Introduction Rock blasting is a fundamental operation in mining and civil engineering, but it generates ground vibrations and air overpressure that can affect nearby structures and communities. Among these effects, peak particle velocity (PPV) and air overpressure (AOp)...

Redefining Last Glacial Maximum environmental conditions in northeastern Brazil: pollen-based evidence of open and moist-adapted vegetation cover

Limited continuous continental records and complex climatic interactions hinder a comprehensive understanding of paleoclimatic and paleoenvironmental conditions during the Last Glacial Maximum (LGM) in the tropics. Adjacent to the currently semi-arid northeastern Brazil (NEB), a...

Mapping scientific production on drones in tourism and recreation (2015–2025): a bibliometric approach and research agenda

Supplementary data 1

Inaccurate primer design and guideline non-compliance limit translational validity of long non-coding RNA research

Abstract Long non-coding RNAs (lncRNAs) are at the research spotlight as inflammation regulators. We systematically searched the asthma animal model literature and evaluated the accuracy of the reported real-time quantitative polymerase chain reactions (RT-qPCRs) on lncRNAs and g...

Acceptance and perceived efficacy of intraoral versus extraoral photobiomodulation for oral mucositis prevention in pediatric patients

Abstract Objective To compare acceptance, tolerability, and perceived efficacy of extraoral (EO) and intraoral (IO) photobiomodulation therapy (PBMT) for oral mucositis (OM) prevention in pediatric oncology patients. Methods Caregivers of 32 pediatric patients undergoing chemothe...

Growth and Overfishing Indicators Applied to the Protandrous Hermaphrodite Fat Snook ( Centropomus parallelus ) in the South Atlantic

ABSTRACT The fat snook Centropomus parallelus is a protandrous hermaphrodite teleost of artisanal and recreational value in the South Atlantic, vulnerable to fishing pressure and size‐selective gears. We evaluated exploitation status using size and age based overfishing indicator...

Behavior of surface contamination by Salmonella spp. on broiler carcasses during slaughter stages

Abstract Salmonella spp. is a globally relevant pathogen frequently associated with foodborne infections and poultry products. This study aimed to evaluate the occurrence and quantification of Salmonella spp. during different stages of the broiler slaughter process and to assess...