diesel exhaust particles are a complex mixture of thousands of gases and fine substances that contain more than 40 different environmental contaminants. being exposed to these exhaust particles (called soot) can cause lung damage and respiratory problems. diesel particulate filters are used in many countries for mobile sources as a legal obligation to decrease harmful effect of these fine parti...

This paper presents an algorithm for isolating a useful acoustic signal (corresponding to damage accumulation) against the background of used model performance industrial rotary equipment. Acoustic emission signals induced by deformation and fracture were studied using uniaxial tensile test on woven laminate samples cut along fiber weft directions. The is random composition pulses A comparison ...

Heart rate can be telemetered from fish using FM radio transmitters (Nomura & Ibaraki, 1969), FM acoustic transmitters (Wardle & Kanwisher, 1974), acoustic pulsed transmitters (Priede & Young, 1977), electromagnetic transmitters (Priede et al. 1985) and acoustic transponders (Storeton-West et al. 1978). Most of these systems transmit only over short distances or cannot be used with the standard...

Stevens Institute of Technology has established a Maritime Security Laboratory (MSL) as a national laboratory resource for government, industry, and universities to advance technologies for the protection of USN maritime infrastructure. Experiment instrumentation includes research vessels, a multiplicity of hydrophones and emitters, stand alone acoustic buoys, diver acoustic simulators, unmanne...

Heart rate can be telemetered from fish using FM radio transmitters (Nomura & Ibaraki, 1969), FM acoustic transmitters (Wardle & Kanwisher, 1974), acoustic pulsed transmitters (Priede & Young, 1977), electromagnetic transmitters (Priede et al. 1985) and acoustic transponders (Storeton-West et al. 1978). Most of these systems transmit only over short distances or cannot be used with the standard...

The paper proposes a method for increasing the radiated acoustic power of ultrasonic (acoustic) devices preventing deposits, ensuring their effectiveness. A formula determining specific magnetostrictive transducer, depending on its physical characteristics, is known from literary sources. However, in practice, this can only be applied to determine calculated theoretical maximum that designed tr...

The characteristics of audio equipment are rarely studied in time domain, mostly in frequency domain. Although the characteristics in frequency domain are important, the primary way humans here sound is in time domain. The characteristics of an audio system in time domain should therefore be given more attention. In this paper, some common misunderstandings of the Fourier theory are discussed, ...