An Internet of Thing (IoT) device includes a body with a processor, a camera and a wireless transceiver coupled to the processor.

A smart vehicle flock navigation system includes a plurality of smart vehicles configured to follow a leader smart vehicle, wherein the leader smart vehicle is configured to follow a target vehicle or a target driving plan; each smart vehicle being equipped with: obstacle detection and avoidance capabilities; vehicle-to-vehicle communication means for transmitting information about obstacles and evasive actions to following smart vehicles; a flock control module for adjusting the driving path of the smart vehicle flock based on transmitted obstacle information; a flocking behavior algorithm based on three independent rules: Separation, Alignment, and Cohesion, controlling the motion of each smart vehicle within the flock; and a distributed flocking operation mechanism utilizing wireless network communication for coordinating the behavior of the smart vehicle flock.

An Internet of Thing (IoT) device includes a body with a processor, a camera and a wireless transceiver coupled to the processor.

A diving board stand comprising a fulcrum base, a fulcrum roller configured to be supported over the fulcrum base and movable on the fulcrum base, a rear anchor for connecting the diving board stand to a rear end of a diving board, and an alignment beam for connecting the fulcrum base to the rear anchor.

An Internet of Thing (IoT) device includes a transceiver coupled to a processor. Blockchain smart contracts can be used with the device to facilitate secure operation.

A diving board lifter and diving board assemblies for lifting a board to a raised position and lowering the board to a dive position. The lifter can mount between a fulcrum assembly and a rear anchor and along an alignment rod of a diving board stand. The lifter can include redundant primary and secondary mechanical safeties for locking the board in a raised position. The lifter can employ a lead screw that moves a linkage including a carriage, a pivot arm, and a pivot shaft to raise and lower the board. An extension shaft can be retracted when the lift is lowered so that a board support member of the lift is spaced below the board. The diving board assembly can include a fulcrum roller and traction material on the board for roller engagement. The lift can press the board support member against the traction material to lift the board.

Wearable electronic devices that are designed to be worn on the head of a user while the user is swimming can determine swimming strokes and swimming performances of the user using motion sensors. Using a sound speaker, the wearable electronic device can play music and provide audio feedback to the swimmer. By comparing the swimming performance of the swimmer wearing the device with previously recorded swimming data, the wearable electronic device can provide audio comparison results to the swimmer while the swimmer is swimming in water. The wearable electronic device can also support similar functions for jumping actions.

Wearable electronic devices that are designed to be worn on the head of a user while the user is swimming can determine swimming strokes and swimming performances of the user using motion sensors. Using a sound speaker, the wearable electronic device can play music and provide audio feedback to the swimmer. By comparing the swimming performance of the swimmer wearing the device with previously recorded swimming data, the wearable electronic device can provide audio comparison results to the swimmer while the swimmer is swimming in water. The wearable electronic device can also support similar functions for jumping actions.

An Internet of Thing (IoT) device includes a camera coupled to a processor; and a wireless transceiver coupled to the processor. Blockchain smart contracts can be used with the device to facilitate secure operation.

A handheld propulsion unit for use by a user in and under water is disclosed. The handheld propulsion unit includes a tubular shaped housing assembly having a forward and rearward end. A channel defined by the tubular shaped housing assembly allows a flow of water to move through the tubular shaped housing assembly. At least one frame member connected to the tubular shaped housing attaches an electric motor within the channel such that the electric motor is coaxially aligned with the channel. A propeller coaxially coupled directly to a rotating part of the electric motor eliminates a drive transfer assembly or a drive transfer housing from spanning the channel. Hand grips on the tubular shaped housing assembly are configured for being held by the user and allowing the user to maneuver a thrust provided by the flow of water through the channel when the propeller is operating.