Instituto Tecnológico de Aeronáutica

Spatially explicit modeling of future land use and land cover dynamics in the São Francisco River Basin, Brazil

Future land use and land cover (LULC) changes in major Brazilian river basins may pose substantial challenges for water resource management by altering streamflow regimes, reducing water availability, affecting ecosystem services, and increasing pressure on vulnerable hydrologica...

Beyond Accuracy: A Computational–Robustness Comparison of Point Cloud Registration Algorithms

The digital documentation of cultural heritage increasingly relies on the fusion of multi-source data to overcome the limitations of individual sensors. This study evaluates the performance of four registration algorithms, Iterative Closest Point (ICP), RANSAC, Fast Global Regist...

Unveiling Latent Market Dynamics: A Hidden Markov Framework for Informed Trading

Abstract The Probability of Informed Trading (PIN) treats informational events as independent across trading days, leaving it silent on how long informational regimes last. We propose the Hidden Probability of Informed Trading (HPIN), which lets the informational state evolve as...

Synthesis of ZnO/SnO2 composite films for solar cells

Abstract Metal oxide films are synthesized as semiconductors in solar cells. Zinc oxide is often used as an electrode in solar cells due to its good photoconversion properties. These same properties can be tuned by adding other elements to the main zinc oxide matrix. Dye sensitiz...

Intelligent Steel Surface Defect Segmentation for Edge-Oriented IIoT Quality Control

Automated surface defect detection in hot-rolled steel is a prerequisite for real-time quality control, yet most deployed inspection systems operate in isolation from Industrial Internet of Things (IIoT) infrastructure. This paper reports a laboratory-scale proof of concept with...

Optimisation of variable material orientations through design subregions for additive manufacturing of fibre composites

Abstract Additive manufacturing enables the production of structures conceived with optimal design freedom, realising the potential of conceptual gains. The design of composites with variable orientations, or variable stiffness design, holds unexplored potential for benefiting fr...

Small boundary: a family of linear-time greedy heuristics for the minimum linear arrangement problem

Abstract This paper addresses the minimum linear arrangement problem, a classical graph layout problem in which the objective is to minimize the sum of absolute differences between the labels assigned to adjacent vertices in undirected graphs. The paper introduces small boundary...

Lessons learned from implementing a PMO in complex military S&T organisations: an ethnographic study

Purpose This study aims to examine how lessons learned from implementing a project management office (PMO) in a defence research, development and innovation (R&D&I) institution generate tangible benefits (efficiency, standardisation) and intangible gains (legitimacy, trus...

Performance of the mixed compression intake system of a scramjet demonstrator at different off-design flight speeds

Abstract This paper focuses on the numerical investigation of the effects of flight speed fluctuations on the intake system performance of the scramjet demonstrator developed in the Universidade Federal do Rio Grande do Norte (UFRN). A set of 2D-RANS simulations based on equation...

Lasers in Defense: Established and Emerging Applications

This poster presents a structured overview of consolidated and emerging military applications of laser systems. The applications are organized into three main domains: optical communications, navigation, sensing, guidance and control, and directed-energy systems. The communicatio...

Lasers in Defense: Established and Emerging Applications

This poster presents a structured overview of consolidated and emerging military applications of laser systems. The applications are organized into three main domains: optical communications, navigation, sensing, guidance and control, and directed-energy systems. The communicatio...