USA As Represented by Secretary of the Navy

Other

The Standard Oil Company

Richard Condit Shockley

Jack R Olson

Michael F Morrison

R Bruce Williams

Andrew J Cameron

Homer P Bucker

Various embodiments of the invention include an intubating stylette device and related methods of using such a device. In some cases, the stylette includes: a handle member having a base and a tip extending from the base, the handle for engaging a hand of an operator; a control member coupled to the tip of the handle member, the control member including at least one actuation member sized to engage with a finger from the hand of the operator; and a tube member coupled to the control member, the tube member including a tip that is movable between at least two positions when the at least one actuation member is moved from a first position to a second position.

Intubating stylette device and related methods

A method and apparatus is provided for communicating digital information using diversity signaling with a constrained amount of transmission energy per bit available. The method may optimize the number of diversity channels used, optimize the energy allocation emitted per bit on each diversity channel, and apply weighting factors to each diversity channel at the receiver. One method includes initializing one or more channels J from Jchannels, calculating a Chernoff bound Bfor the one or more channels J, determining whether J+1 channels may be energetically allowed, and transmitting digital information m using the one or more channels J if the J+1 channels are not allowed or if the J+1 number of channels may be selected but the Chernoff bound Bis minimized.

Energy-control and path-selection method and apparatus for digital diversity signaling

A method of communicating digital signal information through diversity signaling with a constrained amount of transmission energy-per-bit available E. The method includes steps of: measuring channel noise Nand channel transmission loss gon each of a first plurality of diversity channels; and transmitting the digital signal information from a first communications device on each of a second plurality J diversity channels, each with a channel energy allocation Eresponsive to the measurements of channel noise Nand channel transmission loss g; wherein j is an integer such that 1&#x2266;j&#x2266;J, and wherein the second plurality J diversity channels are selected from the first plurality of diversity channels, responsive to the measurements of channel noise Nand channel transmission loss g, and wherein the second plurality J diversity channels are selected responsive to the function wherein &#x3b3; is a non-negative number.

Energy-control method and apparatus for digital diversity signaling

An underwater sensing system has a trunk cable that transmits a plurality clock signals from its first end to its second end. A plurality of signal handling nodes are installed successively along the trunk cable in a spaced apart relationship. Each of a plurality of linear sensor arrays extend from one signal handling node. Each sensor in the sensor arrays receives the clock signals and generates a data output signal in response thereto at specifically ordered time sampled intervals based on a count of the clock signals. The data output signals are transmitted to the one signal handling node associated with the sensor array. At each of the signal handling nodes, a multiplexer interleaves the data output signals received from its sensor array in a continual throughput, time-division multiplexed fashion with concatenated data output signals received from the next successive signal handling node located further from the first end of the trunk cable.

Submerged sensing system using line array segments

An acoustic surface wave device is disclosed for generating an output signal that is the phase-conjugate of the input signal to the device. Disposed on the piezoelectric substrate is a first interdigital transducer for receiving a modulated input signal having a carrier center frequency f.sub.1 and for converting the input signal to an input acoustic wave. A semiconductor material is disposed over the surface of the piezoelectric substrate. A second interdigital transducer is disposed on the surface of the piezoelectric substrate between the first interdigital transducer and the semiconductor material. A standing wave at frequency f.sub.1 is generated by counterpropagating pump waves in the nonlinear acoustic wave interaction region in the area of the semiconductor material. The modulated input acoustic wave interacts with the counterpropagating pump waves in the nonlinear interaction region to generate an output signal on the output of the second interdigital transducer that is the phase-conjugate of the input signal.

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San Diego, CA, United States of America

Richard Condit Shockley