Pneumatic conveying is a transportation method for particulate materials commonly employed in industrial processes. Specifically, dilute phase pneumatic conveying, characterized by high gas velocities, low solid to air ratio, and low pressure drop, is utilized. In this report, three types of materials …

We live in a hearing world. Others live in a deaf world. The deaf world has its own language, the sign language, Dutch or English or . . . Frisian. The deaf world also has its memorials, made out of stone. The only deaf memorial in the Netherlands --- and likely in the whole world --- is in Amsterdam, …