Abstract: A marine multibeam sonar device comprises a processing element and a transmitter. The processing element generates a plurality of transmit transducer electronic signals and inverts a polarity of a first portion of the transmit transducer electronic signals. The transmitter is in communication with the processing element and includes a plurality of transmit electronic circuits and a plurality of transmit transducers. Each transmit electronic circuit receives and processes one of the transmit transducer electronic signals, wherein a first portion of the circuits re-inverts the polarity of the first portion of the transmit transducer electronic signals. The transmit transducers receive the processed transmit transducer electronic signals from the transmit electronic circuits and generate a sonar beam.

Abstract: Described herein are block copolymers that can be used as compatibilizers. The block copolymers can be graft block or triblock copolymers. The block copolymers can include a polysaccharide or a polyester and a polyolefin. Also described herein are polymer blends that can include and be made using the block copolymers described herein.

Abstract: A marine multibeam sonar device comprises a processing element and a transmitter. The processing element generates a plurality of transmit transducer electronic signals and inverts a polarity of a first portion of the transmit transducer electronic signals. The transmitter is in communication with the processing element and includes a plurality of transmit electronic circuits and a plurality of transmit transducers. Each transmit electronic circuit receives and processes one of the transmit transducer electronic signals, wherein a first portion of the circuits re-inverts the polarity of the first portion of the transmit transducer electronic signals. The transmit transducers receive the processed transmit transducer electronic signals from the transmit electronic circuits and generate a sonar beam.

Abstract: Methods for the cross-metathesis of polysaccharides with one or more olefin-terminated side chains and cross-metathesized products are described. In an exemplary embodiment, a method for the synthesis of cellulose ?-carboxyesters via olefin cross-metathesis is described. Conditions of the reactions were relatively mild and the olefin-substituted polysaccharides and the appropriate monomeric olefin partners appear to follow Grubbs rules as summarized herein. The compounds and methods may be useful for structure-property studies, particularly those aimed at developing polymers for drug delivery, such as for controlled-release drug delivery systems, controlled-release coatings, increasing bioavailability of drugs, and maintaining drug supersaturation in the GI tract.

Abstract: A marine multibeam sonar device comprises a transmitter, a memory element, and a processing element. The transmitter includes a plurality of transmit channel circuits, each connected to one of a plurality of transmit transducers. Each transmit channel circuit is configured to receive a transmit transducer electronic signal. The transmit transducers are oriented in a linear array that is configured to form a transmit acoustic beam. The processing element is in communication with the transmitter and the memory element and is configured to generate the transmit transducer electronic signals, each including a serial binary bitstream.

Abstract: A marine multibeam sonar device comprises a processing element and a transmitter. The processing element generates a plurality of transmit transducer electronic signals and inverts a polarity of a first portion of the transmit transducer electronic signals. The transmitter is in communication with the processing element and includes a plurality of transmit electronic circuits and a plurality of transmit transducers. Each transmit electronic circuit receives and processes one of the transmit transducer electronic signals, wherein a first portion of the circuits re-inverts the polarity of the first portion of the transmit transducer electronic signals. The transmit transducers receive the processed transmit transducer electronic signals from the transmit electronic circuits and generate a sonar beam.

Abstract: A sonar transducer array assembly comprises a first flexible circuit, a second flexible circuit, and a plurality of transducer elements. The first and second flexible circuits each include a first side, a second side, and a plurality of adhesive areas spaced apart and positioned in a line along one edge of the first side. The transducer elements each include a first surface attached to one of the adhesive areas of the first flexible circuit, an opposing second surface attached to one of the adhesive areas of the second flexible circuit, and a third surface positioned between the first and second surfaces. The transducer elements form a linear array with the third surface of each transducer element in alignment and configured to transmit and receive an acoustic pressure wave.

Abstract: Methods for the cross-metathesis of polysaccharides with one or more olefin-terminated side chains and cross-metathesized products are described. In an exemplary embodiment, a method for the synthesis of cellulose co-carboxyesters via olefin cross-metathesis is described. Conditions of the reactions were relatively mild and the olefin-substituted polysaccharides and the appropriate monomeric olefin partners appear to follow Grubbs rules as summarized herein. The compounds and methods may be useful for structure-property studies, particularly those aimed at developing polymers for drug delivery, such as for controlled-release drug delivery systems, controlled-release coatings, increasing bioavailability of drugs, and maintaining drug supersaturation in the GI tract.

Abstract: A marine multibeam sonar device comprises a processing element and a transmitter. The processing element generates a plurality of transmit transducer electronic signals and inverts a polarity of a first portion of the transmit transducer electronic signals. The transmitter is in communication with the processing element and includes a plurality of transmit electronic circuits and a plurality of transmit transducers. Each transmit electronic circuit receives and processes one of the transmit transducer electronic signals, wherein a first portion of the circuits re-inverts the polarity of the first portion of the transmit transducer electronic signals. The transmit transducers receive the processed transmit transducer electronic signals from the transmit electronic circuits and generate a sonar beam.

Abstract: A marine multibeam sonar device comprises a transmitter, a memory element, and a processing element. The transmitter includes a plurality of transmit channel circuits, each connected to one of a plurality of transmit transducers. Each transmit channel circuit is configured to receive a transmit transducer electronic signal. The transmit transducers are oriented in a linear array that is configured to form a transmit acoustic beam. The processing element is in communication with the transmitter and the memory element and is configured to generate the transmit transducer electronic signals, each including a serial binary bitstream.

Abstract: A sonar transducer array assembly comprises a first flexible circuit, a second flexible circuit, and a plurality of transducer elements. The first and second flexible circuits each include a first side, a second side, and a plurality of adhesive areas spaced apart and positioned in a line along one edge of the first side. The transducer elements each include a first surface attached to one of the adhesive areas of the first flexible circuit, an opposing second surface attached to one of the adhesive areas of the second flexible circuit, and a third surface positioned between the first and second surfaces. The transducer elements form a linear array with the third surface of each transducer element in alignment and configured to transmit and receive an acoustic pressure wave.

Abstract: A catheter anchoring or securement device and system in combination with or for securing a catheter system to a patient's skin in a fixed position, the invention having a flexible anchor sheet member having an adhesive backing that adheres the flexible anchor sheet member to the patient's skin, a compressible catheter receiving pad mounted to the flexible anchor sheet member, and releasable securing strap covering the compressible catheter receiving pad, wherein the compressible catheter receiving pad is provided with a cavity or recess, the peripheral configuration of which corresponds to the footprint configuration of the catheter body member. The cavity has an axially-oriented channel extending the full width of the flexible anchor sheet member and opposing sets of retention walls defining lateral recesses, the combination of which precludes relative movement of the catheter fitting in all lateral directions.

Abstract: A catheter anchoring or securement device and system in combination with or for securing a catheter system to a patient's skin in a fixed position, the invention having a flexible anchor sheet member having an adhesive backing that adheres the flexible anchor sheet member to the patient's skin, a catheter receiving body mounted to the flexible anchor sheet member, and releasable securing means comprising a cover or closure member covering the catheter receiving body, wherein the catheter receiving body is provided with a cavity or recess, the peripheral configuration of which corresponds to the footprint configuration of the catheter body member. The cavity has an axially-oriented channel extending the full width of the flexible anchor sheet member and opposing sets of retention walls defining lateral recesses, the combination of which precludes relative movement of the catheter fitting in all lateral directions.

Abstract: A catheter anchoring or securement device and system in combination with or for securing a catheter system to a patient's skin in a fixed position, the invention having a flexible anchor sheet member having an adhesive backing that adheres the flexible anchor sheet member to the patient's skin, a compressible catheter receiving pad mounted to the flexible anchor sheet member, and releasable securing means comprising a cover or closure member covering the compressible catheter receiving pad, wherein the compressible catheter receiving pad is provided with a cavity or recess, the peripheral configuration of which corresponds to the footprint configuration of the catheter body member. The cavity has an axially-oriented channel extending the full width of the flexible anchor sheet member and opposing sets of retention walls defining lateral recesses, the combination of which precludes relative movement of the catheter fitting in all lateral directions.

Abstract: An H-shaped clip is used to connect two pieces of building material such as plywood, roofing sheath, wafer board or other materials quickly, easily and securely. The H clip includes two tapered arms connected by a spacing bar, where each arm ends in a ski-shaped lead-in having a contoured face and a living hinge.