Abstract: A fan device used with respect to a computing device. The fan device includes at least two fans that provide airflow for the computing device and a controller that adjusts the fans' speeds in an attempt to avoid harmonic vibrations of the at least two fans. The fan device may include at least one sensor, and the controller may adjust the fans' speeds based at least on information from the sensor(s) in the attempt to avoid the harmonic vibrations. The attempt to avoid the harmonic vibrations may also attempt to mitigate one or more of turbulence, pressure, over-heating, power consumption, or noise in, by, or around the computing device. Reversal of airflow may also be used. A fan bar that enables isolation of ground return noise may also be used. The controller may use sums of primes calculations, phase analysis, common divisor calculations, and the like. Also, associated methods.

Abstract: The invention is used with a display (10) of a left and right stereoscopic images in adjacent side-by-side array on a two-dimensional imaging surface such as the screen of a computer monitor or television. The left and right images (L and R) are rotated by 90 degrees in opposite directions from their normal upright orientations. A viewing device which includes a right pair of mirrors (2 and 4) and a left pair of mirrors (1 and 3) is placed between the viewer and the display. The mirrors are oriented at fixed and predetermined angular relationship to deflect the lines of sight from the viewer's eyes to the respective right and left images, and to rotate them by 90 degrees. As a result, the users left and right eyes see upright versions of the left and right images, respectively, creating a wide-field stereoscopic illusion of the images.