Geopolymers are a sustainable alternative to Ordinary Portland Cement (OPC). These binders with a lower CO2 footprint are produced by alkaline activation of a source of amorphous aluminosilicates. The geopolymers can ...

The systems typically used for cost management in civil construction have a major deficiency, highlighting the difficulty of restructuring when the schedule-planning is interrupted. As a result, there is a need to integrate ...

After so many tragedies involving fire have occurred in history, fire prevention and protection has become essential over the years, since it is important to maintain the integrity of human life and protection over it, ...

When it comes to a prototype of Formula SAE type, they are in constant evolution and modifications, always looking for the current regulation as the design limitation. Still, many technologies can be employed in these ...

Pulsed wind tunnels are tools used to reproduce the necessary conditions to perform research and development which depend of high Mach number flows. The replication of these flow conditions is crucial for the validation ...

One of the biggest challenges of chemical industries of fertilizer sector is on the search to attend the ambiental requirements, aiming guarante the conformity with all legal requirements and community too. The search ...

This paper shows an approach to electrical generation using Biomass (rice husk, wooden residual) through which it was possible to observe a better enclosure of knowledge about environmental management. The methodology ...

This work presents contributions to the sinusoidal acceleration control of electrodynamic shakers applied in vibration testing. Considering the importance of sine tests to identify critical frequencies of operation and to ...

This Ph. D. Thesis presents a in deep study of the mechanism of resonant transition soft-switching techniques. By means of the principles that rules the PWM resonant transition converters, a novel tool for analysis and ...

This work presents the study on a linear ultrasonic motor with tubular geometry for linear displacements. Similar topologies, reported elsewhere, are conceived for producing rotary motions. Due to some particular characteristics ...