The best tech products announced this week include Sony's noise-canceling headphones and Audio-Technica's stunning turntable.

PTZ CAMERA BUNDLE WITH SPEAKERPHONE , PTZ full HD1080P 3X optical camera, accurate, smooth, and silent PTZ movement. The superior 3x optical zoom lens, excellent white balance, and exposure mode ...

Among other things, the course includes elementary linear algebra, the solution of equation systems, the theory of functions of several variables, including both unconstrained and constrained ...