Abstract: Systems, devices, and methods are described for providing, among other things, a neck and spine strengthening device. The strengthening device includes a spinal resistance assembly configured to apply a resist force or to resist rotation about at least a first axis, and a head affixing assembly configured to secure to a head of a user during use. The strengthening device is instrumented with sensors and an embedded computing system configured to securely exchange exercise performance and configuration data with local client devices, and to monitor and record exercise activity and exercise performance data.

Abstract: Systems, devices, and methods are described for providing, among other things, a neck and spine strengthening device. In an embodiment, the neck strengthening device includes a spinal resistance assembly including at least one resistance component configured to apply a resist force or to resist rotation about a first axis. In an embodiment, the spinal resistance assembly permits lateral neck rotation of a user about the first axis while substantially limiting flexional and extensional movement. In an embodiment, the neck strengthening device includes a device securing assembly configured to physically anchor the device to an anchoring structure. In an embodiment, the neck strengthening device includes a head affixing assembly configured to secure to a head of a user during use.

Abstract: An ARINC Specification 429 transmitter provided with self test capability. A dual transmitter (10) converts parallel data provided from an external source through a bidirectional data bus (12) to a serial data format corresponding to Aeronautical Radio Incorporated (ARINC) Specification 429. The dual transmitter includes two first-in-first-out (FIFO) storage buffers (20a, 20b), which may be used separately by each transmitter, or alternatively may be daisy chained to provide 128 words of buffered storage for one of the transmitters. One of two different fault detection tests or modes is enabled upon hardware or software reset of the dual transmitter. In a scan test mode, the dual transmitter transmits ARINC data while generating a signature value corresponding to the data for comparison to an expected signature value generated by an external microporcessor or computer, to detect errors in the data input to the device or a fault in the internal circuitry of the dual transmitter.