Abstract: Systems and methods for capturing situational awareness information are provided. The systems and methods include a portable aircraft configured to obtain situational awareness information. The portable aircraft includes a body including deployable wings, a stability device coupled to the body, the stability device including deployable tail fins, a propulsion device configured to propel the portable aircraft aloft, a capture device configured to selectively capture situational information, and a communications device configured to transmit captured situational information to a ground based receiver.

Abstract: A chair for use with a vehicle is provided. The chair includes a base and a chair assembly slidably coupled to the base. The chair assembly includes a support frame, a seat coupled to the support frame, an upper back support coupled to the support frame, and a lower back support coupled to the support frame and independently rotatable with respect to the upper back support.

Abstract: A lower lumbar traction device for pulling and bending of the human spine with the hips suspended above the underlying surface. This device and method of use is a simple tool that when used properly may help those suffering from common forms of mechanically induced low back pain. The device and method of use uses gravity, leverage, and friction to produce decompressive forces directed at the most common location of discomfort, i.e., the posterior side of the lower lumbar vertebrae where bulging disc materials press against spinal nerves emerging from the spinal column as well as muscle stretching forces applied to lower and middle back area. The device comprises of: a width-adjustable and position-adjustable popliteal support mechanism; a popliteal support attachment mechanism; a truss with a plurality of slots; a hinge mechanism; a height-adjustable forward leg assembly with optional handles; a height-adjustable aft truss support mechanism; and a plurality of cables.

Abstract: A chair for use with a vehicle is provided. The chair includes a base and a chair assembly slidably coupled to the base. The chair assembly includes a support frame, a seat coupled to the support frame, an upper back support coupled to the support frame, and a lower back support coupled to the support frame and independently rotatable with respect to the upper back support.

Abstract: An RF plasma system employs frequency tuning to change the frequency of an RF generator within a frequency range to match the impedance of a plasma chamber. Forward power and reflected power magnitudes are obtained from a bidirectional sensor. The ratio of reflected power to forward power is obtained for one frequency, and then the frequency is changed. The tuning algorithm compares the ratio of reflected to forward power at the new frequency with the ratio obtained earlier. If this ratio is smaller, the frequency is changed again in the same direction, but if larger, then the frequency is changed in the other direction. These steps are iterated until the ratio of reflected to forward power reaches a minimum. The tuning algorithm can be implemented in hardware or in software.