This paper addresses several practical and theoretical issues encountered in the analysis of gunshot audio recordings. Gunshot recordings have the potential for both tactical detection and forensic evaluation. Such recordings can provide information about speed and trajectory of the projectile, the estimated location of the shooter, and in some cases the type of firearm and ammunition used. How...

Hard real-time systems refer to computer systems that have stringent deadlines. A failure to satisfy timing constraints may result in catastrophic consequences. Real-time applications include temperature control of a nuclear reactor core, air traffic control, and telemetry. In this paper, we propose to model a real-time system using a combination of hyperperiodic, periodic, and aperiodic tasks....

Performance-driven computer development has lasted for over six decades. Computers have been developed to achieve higher performance. As of June 2010, three supercomputers have achieved petaflops speed: Cray Jaguar (224,162 processors, 1.759 petaflops), Dawning Nebulae (120,640 processors, 1.271 petaflops), and IBM Roadrunner (122,400 processors, 1.042 petaflops) (1). According to Moore’s law o...

Torben Pastore had careers in rock n’ roll, furniture design, and construction before beginning a research career psychoacoustics. Now he investigates how humans perceive their acoustical surroundings.

The Reflections series takes a look back on historical articles from Journal of the Acoustical Society America that have had significant impact science and practice acoustics.