September 2011

Versatile solid-state stepper motor controllers

  Alternative forms of solid-state motor controllers have been presented in this paper including the effective use of read only memories in stepper motor controller implementations. An innovative low-cost universal stepper motor controller capable of controlling any kind of stepper motor has also been featured. The treatment includes a way of achieving a time-multiplexed control of several stepper motors with...

Author(s): Inyiama Height Chibueze and Okezie Christiana Chikodi

September 2011

Interference reduction in mobile ad hoc and sensor networks

  There are still a lot of open questions in the field of mobile ad hoc networks (MANETs) and sensor networks. If a topology incurs a large interference, either many communication signals sent by nodes will collide, or the network may experience a serious delay at delivering the data for some nodes, and even consume more energy. So, we reach the conclusion that interference imposes a potential negative impact...

Author(s): Maaly A. Hassan and Ibrahim S. Abuhaiba