Federal Institute of São Paulo

Few bilinear operators on spaces of continuous functions

Motivated by recent work exhibiting a locally compact scattered space L constructed under Ostaszewski’s ♣-principle, which yielded a complete classification of linear operators on C0(L×L), we extend the analysis to the bilinear setting. We show that, for this space L, every bilin...

Electrical excitation selects electrothermal hysteretic operating regimes in VO$$_2$$ devices

Abstract Vanadium dioxide (VO $$_2$$ ) exhibits a sharp metal–insulator transition accompanied by intrinsic thermal hysteresis, enabling rich nonlinear electro–thermal dynamics and a broad range of device functionalities. In VO $$_2$$ devices, electrical hysteresis is commonly in...

Introducing Acid–Base Titration on Paper-Based Analytical Devices in a High-School Chemistry Laboratory for the Determination of Acetylsalicylic Acid

Abstract In this study, paper-based analytical devices (PADs) were used to introduce a simple, rapid, portable, and low-cost acid–base titration method in high school chemistry laboratories. Students performed conventional and paper-based titrations to determine the amount of ace...

Winter Wines as an Emerging Wine Category: Double Pruning, Human-Mediated Terroir and Market Perspectives

The global wine sector faces climatic instability, changing consumption patterns and demand for differentiated products linked to origin, authenticity and experience. In this context, winter wines can be conceptualized as an emerging and still-consolidating wine category based on...

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...

High-productivity PBF-LB/M processing of Ti–Nb–Ta alloys: tailoring microstructure and phase evolution for low-modulus orthopedic implants

Abstract Metallic bone implants with a high Young’s modulus can cause stress shielding, leading to bone resorption and long-term failure. β-stabilized titanium alloys have been widely explored to overcome this limitation due to their lower elastic stiffness. In this study, Ti-20N...

Safety and reproductive performance in sows after vaccination: a randomized controlled trial

Abstract Although reproductive vaccines are essential in swine herd health programs, evidence on their safety across different physiological stages remains limited. This study evaluated the clinical and reproductive safety of Porcilis ® EPL in sows and gilts under commercial fiel...