National Research Council

Does an Unconventional Source with a High Silica Content (Obsidian) or a High Alumina Content (Bauxite) Affect the Type of Potassium Zeolite Formation? Preliminary Data on Synthetic Products’ Efficiency in Ammonium Removal

In this paper, obsidian (OS) and bauxite (BX) are used to synthesize zeolites via KOH prefusion, followed by a conventional hydrothermal process (HY) or an unconventional vapor-phase crystallization method (VPC) at 90 °C. The results indicate that, due to their chemical and miner...

Helicopter Ditching According to the European Union Aviation Safety Agency CS-29

This paper outlines the methodology and results of scale-model tests of a helicopter ditching maneuver. The experimental campaign aims to support the study and certification of helicopters for maritime operations, in accordance with the requirements set by the European Union Avia...