Exact and Earth Sciences

• Socioeconomic Factors and Academic Performance: An Explainable and Predictive Analysis of ENEM in Rio Grande do Norte

  Rodrigo Tertulino, Ricardo Almeida, Laércio Alencar

  Submitted 12/23/2025 - Posted 01/06/2026

  • Machine Learning
  • Explainable Artificial Intelligence (XAI)
  • Educational Inequality
  • ENEM
  • Rio Grande do Norte

  • PDF (Portuguese)
• A Deduction of the Conditions of Conformality, Equivalence, and Equidistance of Normal CylindricalProjections

  Isaac Ramos, Leonard Silveira, Vinícius Martins, Andréa Seixas, Sílvio Garnés, Lucas Calado, Paulo Airoldi

  Submitted 12/12/2025 - Posted 12/29/2025

  • Mathematical Cartography
  • Mapping
  • Distortion

  • PDF (Portuguese)
• The relation between mass and energy in the Theory of Special Relativity: On the history of the formulation of E = mc²

  Vinícius Carvalho da Silva, Wellington Pereira de Queirós, Clair de Luma Capiberibe Nunes

  Submitted 12/12/2025 - Posted 12/18/2025

  • Einstein
  • E=mc²
  • Special Relativity
  • History of Physics
  • Mass-Energy

  • PDF (Portuguese)
• The Standard Model as board game: an outreach project for teaching particle physics

  Adriano Cherchiglia, Marceli Aquino, Rodrigo Machado Aquino Leme, Theo Basso Pilon

  Submitted 11/14/2025 - Posted 12/11/2025

  • particle physics
  • science communication
  • university outreach

  • PDF (Portuguese)
• The Influence of School-Level Structural Factors on Creativity and Math Achievement Among Students in Brazil: A Multilevel Analysis

  Helena Rodrigues Ferreira

  Submitted 12/08/2025 - Posted 12/09/2025

  • Creativity
  • PISA Score
  • School Resources
  • Multilevel Analysis
  • Math Achievement

  • PDF
• On the True Origin of Quantum Nature in Atoms: A Missing Story

  Ghanshyam Jadhav

  Submitted 11/08/2025 - Posted 11/13/2025

  • Photoelectric effect
  • Light quanta
  • Force through field-field interaction
  • Apparent force
  • Spin
  • Formation of atoms
  • Formation of molecules
  • quantum entanglement

  • PDF
• Determination of Natural Uranium and Thorium Levels in Environmental Matrices Surrounding Uranium Mining Sites via ICP-MS

  Joel Augusto Moura Porto, Lander de Jesus Alves, Hector Hugo Silva Medrado, Josilene da Silva Rocha, Rodrigo Gibaut de Souza Góis, Fábio Carvalho Nunes, Marcelo Machado Viana, Ana Paula de Carvalho Teixeira

  Submitted 09/29/2025 - Posted 11/12/2025

  • uranium
  • thorium
  • mining
  • ICP-MS
  • ore
  • water
  • soil

  • PDF (Portuguese)
• Solving Real-Time Distribution of Pickup and Delivery Tasks with Multiple Robotic Agents

  Heder Soares Bernardino, Alex Borges Vieira, José Ronaldo Mouro

  Submitted 10/30/2025 - Posted 11/10/2025

  • multi-agent
  • real-time
  • heuristics

  • PDF
• Spatiotemporal analysis of homicides and their possible relationship withunplanned urban expansion in Salvador, Bahia

  Evaldo Simões, Jocimara Lobão, Felipe Nery, Daniel Portella

  Submitted 11/02/2025 - Posted 11/04/2025

  • Socio-spatial dynamics
  • Territoriality
  • Urban resilience
  • Marginalization
  • Violence

  • PDF (Portuguese)
• Baseline survey of microplastics in Phallusia nigra (Ascidiacea) in different sites along the Brazilian Coast, Central, and Southwest Atlantic

  Paulo Cezar Silva, Mariana Pacheco Almeida, Rayane Sorrentino, Luis Felipe Skinner

  Submitted 10/24/2025 - Posted 10/24/2025

  • MARINE POLLUTION
  • FILTER-FEEDERS
  • POLYMER COMPOSITION
  • TROPICAL ECOSYSTEMS

  • PDF (Portuguese)
• Cigarette butt pollution on a mesotidal Argentine beach: spatial patterns, environmental drivers, and implications for coastal management

  Maria Luján Bustos, Federico Ferrelli, Fiamma Antonela Lefiu, Gerardo Perillo, María Piccolo

  Submitted 10/21/2025 - Posted 10/23/2025

  • CIGARETTE BUTTS
  • MESOTIDAL BEACHES
  • CBPI
  • COASTAL MONITORING
  • MARINE LITTER

  • PDF
• A protocol for leveraging AI in GEE for land use and land cover transition mapping: the Case of São Paulo (1985-2024)

  Rodrigo da Cunha Pacheco

  Submitted 10/16/2025 - Posted 10/23/2025

  • Geoprocessing
  • Artificial Intelligence
  • Google Earth Engine
  • Urban Expansion

  • PDF (Portuguese)
• A protocol for leveraging AI in GEE for land use and land cover transition mapping: the Case of São Paulo (1985-2024)

  Rodrigo da Cunha Pacheco

  Submitted 10/14/2025 - Posted 10/23/2025

  • Geoprocessing
  • Artificial Inteligence
  • Google Earth Engine
  • Urban Expansion

  • PDF
• Hilbert–Pólya via de Branges and the Weyl m-Function: Vertical Convolution and the Riemann Hypothesis

  Edvaldo Araújo dos Reis

  Submitted 09/12/2025 - Posted 10/21/2025

  • Riemann Hypothesis
  • Hilbert-Pólya Program
  • Hilbert-Pólya program
  • de Branges spaces
  • Weyl-Titchmarsh m-function
  • Schrödinger operators
  • Vertical convolution

  • PDF
• Is the Four-Color Theorem a Real Analysis problem?

  José Ulisses Jansen Jansen

  Submitted 08/20/2025 - Posted 09/01/2025

  • Analytical demonstration
  • System of Equalities and Inequalities,
  • Four Color Theorem

  • PDF
• Yukawa-Mediated Transitions in a Quantum Multiverse: Predictions for CMB and Testable Gravitational Wave Signals

  Marcelo de Oliveira Souza

  Submitted 08/15/2025 - Posted 09/01/2025

  • Multiverse
  • Dark Energy
  • Yukawa Potential
  • Cosmological Inflation
  • CMB anomalies

  • PDF
• ODD PERFECT NUMBERS: CONGRUENCE RELATION BETWEEN THEIR PROPER DIVISORS ANALYZED IN PAIRS OF EVEN NUMBERS AND ITS IMPLICATIONS

  Imanol Urcola

  Submitted 08/09/2025 - Posted 09/01/2025

  • perfect numbers
  • congruence relation
  • proper divisors
  • Euclid-Euler Theorem
  • sigma function

  • PDF (Spanish)
• Feeding preference of the sea hares Aplysia brasiliana and A. juliana from Brazilian littoral: Different trophic specialization

  Renato Pereira, Andressa Contreras, Felipe Ribeiro, Marcus Vinícius Guimarães, Daniela Sudatti

  Submitted 08/24/2025 - Posted 08/25/2025

  • SEAWEED SUSCEPTIBILITY
  • DIETARY PREFERENCES
  • FEEDING HABIT
  • HERBIVORE PREFERENCE

  • PDF
• Microplastic Hotspots on a Tropical Estuarine-Bay System

  Arian Dialectaquiz, Danilo Augusto Silva, Dalton Sasaki, Marcelo Dottori

  Submitted 08/06/2025 - Posted 08/06/2025

  • Lagrangian drift
  • ocean modelling
  • plastic pollution
  • Opendrift

  • PDF
• A Strategic Finite Element Approach for Verification and Simulation of an Epidemiological Model for Dengue

  Amanda Cabral, Edivaldo Junior

  Submitted 08/01/2025 - Posted 08/04/2025

  • Epidemiology
  • Dengue
  • Finite elements
  • Simulation

  • PDF
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