Abstract: Disclosed are peptide amphiphiles comprising a hydrophilic peptide sequence and a hydrophobic tail, wherein the hydrophobic tail comprises a moiety having a substituted C16 alkyl chain, wherein the hydrophilic peptide sequence comprises a degrading sequence (DS), wherein the degrading sequence (DS) comprises the amino acid sequence GTAGLIGQ (SEQ ID NO:1) wherein the DS comprises one or more amino acid substitutions. Also disclosed are compositions, liposomes, gels, and medical devices comprising the peptide amphiphiles and methods of use thereof.

Abstract: Disclosed are peptide amphiphiles comprising a hydrophilic peptide sequence and a hydrophobic tail, wherein the hydrophobic tail comprises a moiety having a substituted C5 alkyl chain, wherein the hydrophilic peptide sequence comprises a nitric oxide producing donor sequence. In some aspects, the hydrophilic peptide sequence comprises a degrading sequence (DS), wherein the degrading sequence (DS) comprises the amino acid sequence GTAGLIGQ (SEQ ID NO:1) wherein the DS comprises one or more amino acid substitutions. Also disclosed are compositions, liposomes, gels, and medical devices comprising the peptide amphiphiles and methods of use thereof.

Abstract: Systems and methods for navigation of a vehicle may carry out one or more operations including, but not limited to: obtaining coordinates of a vector connecting two points in space using carrier phase measurements from global navigation system satellites (GNSS); setting the vector as an intended path of a vehicle; storing carrier phase signals from a GNSS receiver received at a first position of the vehicle; receiving carrier phase signals from a GNSS receiver at a second position of the vehicle; and determining a position of the vehicle relative to the intended path from one or more carrier phase signals received at the second position and one or more stored carrier phase signals received at the first position.

Abstract: Systems and methods for navigation of a vehicle may carry out one or more operations including, but not limited to: obtaining coordinates of a vector connecting two points in space using carrier phase measurements from global navigation system satellites (GNSS); setting the vector as an intended path of a vehicle; storing carrier phase signals from a GNSS receiver received at a first position of the vehicle; receiving carrier phase signals from a GNSS receiver at a second position of the vehicle; and determining a position of the vehicle relative to the intended path from one or more carrier phase signals received at the second position and one or more stored carrier phase signals received at the first position.

Abstract: A method of generating a differentially corrected pseudorange residual in a differential global positioning system includes tracking at a base station first and second GPS signals, having first and second frequencies, from a first satellite. At the base station, a first pseudorange measurement is determined from the tracked first GPS signal. At the base station, a first smoothed pseudorange measurement is calculated from the determined first pseudorange measurement as a function of both the first and second GPS signals. The first smoothed pseudorange measurement is provided to a remote GPS receiver. The remote GPS receiver calculates the differentially corrected pseudorange residual as a function of the first smoothed pseudorange measurement provided by the base station.

Abstract: A system of utilizing a single radio receiver with continuously broadcast GPS signals in order to determine precise relative positioning between two arbitrary positions or to determine current position. The invention includes utilizing changes in the carrier signal as detected by the GPS receiver occurring as a result of the movement from a first position to a second position.