An adaptive beamforming system for broadband sonar with a convergence time on the order of the pulse duration and effective interference nulling capabilities which enhance desirable echoes. The method uses an element based time implementation algorithm in which beam data that is formed in the direction of each interferer is successively subtracted from the element data using an adaptive FIR filter. The system can be applied to impulsive source sonar data and passive sonar data.

Amplitude comparison DF apparatus for measuring the direction of incoming signals. The apparatus comprises an omnidirectional ring antenna for receiving incoming RF signals. The antenna consists of a ring of air spaced coaxial cable having a plurality of radiating elements symmetrically spaced and positioned about the circumference of the ring in an energy coupling relationship with respect to the ring. Probe apparatus are provided for sampling the coupled energy at selectively predetermined poi...

A remote controlled boar guidance system and method of artificially inseminating sows for facilitating movement of a boar inside a swine insemination facility to permit safe and efficient insemination of sows by a single person. The remote controlled boar guidance system and method of artificially inseminating sows includes a remote controlled steerable vehicle having sufficient power to move a boar within confined spaces inside a swine insemination facility. The vehicle includes a plurality of ...

The improved animal training device (10) has a handle (12) which comprises a handle top member, a handle bottom member and a handle middle member (12C) and at least one striking plate (14) having a outer striking plate (14A) circumferentially attached to the handle middle member (12C). The improved animal training device (10) functions as an animal behavioral modification device in accord with Pavlovian Conditioning whereas when an animal is performing an undesirable act, a user strikes the impr...

A protein skimmer for filtering and cleaning water in an aquarium having a foam generating assembly having an air chamber (73) and a nozzle (74) in the air chamber, the nozzle being provided with a plurality of air holes (741) and being connected to an inlet tube (71), the inlet tube communicating with a foam cavity within a vertical guide tube (20) for foam, the guide tube (20) generally being tapered as a whole and including an open upper end (202), a bottom end (203) and a hollow cone-shaped ...

A service dog harness has a base member and a strap system for attaching the base member to a dog. A rigid platform is provided on a top side of the base member, and a soft cushion material extends under and beyond the sides of the rigid platform to impart a soft cushion feel over the underside of the base member. A collar strap assembly is attached to the front end of the base member and is adjustable to fit about a dog's lower neck and chest in front of the forelegs. A trunk strap assembly is ...

Method and apparatus to measure jitter (period-to-period fluctuations in fundamental frequency) among the voices of suicidal, major depressed, and non-suicidal patients to predict near-term suicidal risk.

A dog harness has a collar having a front ring and rings at each of its free ends. A releasable buckle functions to releasably couple the collar free ends. A cord passes through the rings and forms a pair of loops for disposition in the foreleg pits of a dog. A ring and fastener at the cord free ends releasably couples these ends with the ring and is also adapted to be coupled with a leash. A strain on the leash and harness caused by the dog will exert pressure to the foreleg pits which will res...

A pet animal mobility aid for four-legged pet animals includes central strap extending longitudinally between a forward end and a rearward end for placement along the back of the animal, a forward strap assembly for affixing the forward end of the central strap to the animal adjacent the forelegs of the animal, a rearward strap assembly for affixing the rearward end of the central strap to the animal adjacent the hind legs, the rearward strap assembly including a relatively flexible first rearwa...

A method for inducing cats to exercise consists of directing a beam of invisible light produced by a hand-held laser apparatus onto the floor or wall or other opaque surface in the vicinity of the cat, then moving the laser so as to cause the bright pattern of light to move in an irregular way fascinating to cats, and to any other animal with a chase instinct.