Fully Developed Turbulent Pipe Flow -- Decay of Disturbances in Turbulent Pipe Flow -- Optimal Characteristic Parameters for the Disturbances in Turbulent Pipe Flow -- Measurement of Velocity and Turbulence Downstream of Flow Conditioners -- Signal Processing of Complex Modulated Ultrasonic Signals -- Vortex-Shedding Flow Metering Using Ultrasound -- Ultrasonic Gas-Flow Measurement Using Correl…