The Squealy Wheel

Legendary New Jersey thrashers, OVERKILL, have recently announced their upcoming eighteenth album, "The Grinding Wheel", which will be released on February 10th, 2017 via Nuclear Blast. The album is significantly different to the three previous ones, musically speaking. While these were more direct, raw and stronger in the riffing and overall explosion, "The Grinding Wheel" is actually very diverse, sludgy and heterogeneous in the songwriting and melody departments.

The American Indian medicine wheel was an ancient way of creating sacred space and calling forth the healing energies of nature. Now, drawing on a lifetime of study with native healers, herbalist and ethnobotanist E. Barrie Kavasch offers a step-by-step guide to bringing this beautiful tradition into your own life–from vibrantly colorful outdoor circle designs to miniature dish, windowsill, or home altar adaptations.

The clumsy and shy Stanley is a nice fellow, beloved by his colleagues in the office. He has a crush on the gorgeous new-hire Diana, but he has difficulties to get close to her. When Stanley finally invites Diana for …

Epiphany O'Day has been laughed out of her University. Her superiors think her wild theories on the ancient and mysterious Dragon Wheel artifact are pure fantasy. But her mentor, Professor Lunn has used her careful research to unlock dark forces and he begs her to help him before its too late. But powerful, evil people have taken notice of her work and now a trail of blood and ancient torment are forcing our beautiful young sleuth to tangle with more than academia.

This monograph describes the Reaction Wheel Pendulum, the newest inverted-pendulum-like device for control education and research. We discuss the history and background of the reaction wheel pendulum and other similar experimental devices. We develop mathematical models of the reaction wheel pendulum in depth, including linear and nonlinear models, and models of the sensors and actuators that are used for feedback control. We treat various aspects of the control problem, from linear control of themotor, to stabilization of the pendulum about an equilibrium configuration using linear control, to the nonlinear control problem of swingup control. We also discuss hybrid and switching control, which is useful for switching between the swingup and balance controllers. We also discuss important practical issues such as friction modeling and friction compensation, quantization of sensor signals, and saturation. This monograph can be used as a supplement for courses in feedback control at the undergraduate level, courses in mechatronics, or courses in linear and nonlinear state space control at the graduate level. It can also be used as a laboratory manual and as a reference for research in nonlinear control.