Abstract: A system for determining airtime, speed and/or drop distance of a moving sportsman includes at least one accelerometer for detecting vibration or acceleration of the sportsman and/or a GPS unit. A processor in communication with the at least one accelerometer may process signals from the accelerometer to determine free-fall.

Abstract: A method is described for simulating the f-sigma timing path delay of an integrated circuit design when local transistor variations determine the stochastic delay. This is achieved by determining an estimated delay time for a first timing path using non-linear operating point analysis of local variations (NLOPALV). An operating point is calculated for each cell that is included in a timing path in the integrated circuit design. The f-sigma operating point of a cell-arc is a point on the cell-arc delay function (CADF). An f-sigma delay value is determined for each cell using the selected operating point on the CADF of the cell. The determined delay values of the plurality of cells in the timing path may then be combined to predict the estimated delay for the entire timing path. The method may be extended to deal with slew rate, predict hold time statistics, prune paths, and deal with convergent paths.

Abstract: A location measurement system comprises: a GPS receiver for attachment to a person and for determining earth location of the person; a display for attachment to the person; memory for storing map data; a processor configured to process earth location and the map data to instruct display the person's current location with a map on the display.

Abstract: A system for determining airtime, speed and/or drop distance of a moving sportsman includes at least one accelerometer for detecting vibration or acceleration of the sportsman and/or a GPS unit. A processor in communication with the at least one accelerometer may process signals from the accelerometer to determine free-fall.

Abstract: A system for determining airtime of a moving sportsman includes at least one accelerometer for detecting vibration or acceleration of the sportsman. A processor in communication with the at least one accelerometer processing signals from the accelerometer to determine free-fall. A pressure sensor may be used to determine change in altitude and the processor may process signals from the pressure sensor with the accelerometer signals to determine airtime and drop distance during free-fall. A method for determining airtime of a moving sportsman includes processing data from one or more accelerometers attached to the sportsman, to determine when the sportsman is in free-fall, and determining a time period corresponding to the free-fall.

Abstract: A shoe is improved by including: at least one accelerometer for generating acceleration signals and a processor configured to process the acceleration signals to determine one or both of speed and distance traveled of a person wearing the shoe. A shoe and a garment are provided with a wireless transmitter, to provide information about the shoe/garment or a person wearing same.

Abstract: A system for determining airtime of a moving sportsman includes at least one accelerometer for detecting vibration or acceleration of the sportsman. A processor in communication with the at least one accelerometer processing signals from the accelerometer to determine free-fall. A pressure sensor may be used to determine change in altitude and the processor may process signals from the pressure sensor with the accelerometer signals to determine airtime and drop distance during free-fall. A method for determining airtime of a moving sportsman includes processing data from one or more accelerometers attached to the sportsman, to determine when the sportsman is in free-fall, and determining a time period corresponding to the free-fall.

Abstract: A shoe is improved by including: at least one accelerometer for generating acceleration signals and a processor configured to process the acceleration signals to determine one or both of speed and distance traveled of a person wearing the shoe. A shoe and a garment are provided with a wireless transmitter, to provide information about the shoe/garment or a person wearing same.

Abstract: A shoe is improved by including: at least one accelerometer for generating acceleration signals and a processor configured to process the acceleration signals to determine one or both of speed and distance traveled of a person wearing the shoe. A shoe and a garment are provided with a wireless transmitter, to provide information about the shoe/garment or a person wearing same.

Abstract: A system for determining airtime of a moving sportsman includes at least one accelerometer for detecting vibration or acceleration of the sportsman. A processor in communication with the at least one accelerometer processing signals from the accelerometer to determine free-fall. A pressure sensor may be used to determine change in altitude and the processor may process signals from the pressure sensor with the accelerometer signals to determine airtime and drop distance during free-fall. A method for determining airtime of a moving sportsman includes processing data from one or more accelerometers attached to the sportsman, to determine when the sportsman is in free-fall, and determining a time period corresponding to the free-fall.

Abstract: A shoe is improved by including: at least one accelerometer for generating acceleration signals and a processor configured to process the acceleration signals to determine one or both of speed and distance traveled of a person wearing the shoe. A shoe and a garment are provided with a wireless transmitter, to provide information about the shoe/garment or a person wearing same.

Abstract: A system determines athletic performance. A pressure sensor senses change in elevation. A microprocessor processes signals from the pressure sensor to determine speed corresponding to the change in elevation. A display reports the speed to a user.

Abstract: A system determines impact of a helmet. The helmet includes at least one accelerometer and a processor. The accelerometer detects acceleration of the helmet. The processor is configured to process the signals from the accelerometer to determine impact of the helmet.

Abstract: A system for determining airtime of a moving sportsman includes at least one accelerometer for detecting vibration or acceleration of the sportsman. A processor in communication with the at least one accelerometer processing signals from the accelerometer to determine free-fall. A pressure sensor may be used to determine change in altitude and the processor may process signals from the pressure sensor with the accelerometer signals to determine airtime and drop distance during free-fall. A method for determining airtime of a moving sportsman includes processing data from one or more accelerometers attached to the sportsman, to determine when the sportsman is in free-fall, and determining a time period corresponding to the free-fall.

Abstract: An activity monitor, comprises housing for attachment to a person; at least one accelerometer disposed within the housing; and a processor disposed within the housing, for processing signals from the accelerometer to assess activity of the person. A method assesses activity of a person, including: sensing acceleration at a first location on the person; processing the acceleration, over time, to assess activity of the person; and wirelessly communicating information indicative of the activity to a second location.

Abstract: A location measurement system comprises: a GPS receiver for attachment to a person and for determining earth location of the person; a display for attachment to the person; memory for storing map data; a processor configured to process earth location and the map data to instruct display the person's current location with a map on the display.

Abstract: A system determines athletic performance. A pressure sensor senses change in elevation. A microprocessor processes signals from the pressure sensor to determine speed corresponding to the change in elevation. A display reports the speed to a user.

Abstract: A system determines impact of a helmet. The helmet includes at least one accelerometer and a processor. The accelerometer detects acceleration of the helmet. The processor is configured to process the signals from the accelerometer to determine impact of the helmet.

Abstract: System determines impact of a helmet, comprising: accelerometer and processor, the accelerometer detecting acceleration of the helmet, the processor configured to process the signals from the accelerometer to determine impact of the helmet. System determines athletic performance, comprising: pressure sensor for sensing change in elevation; microprocessor for processing signals from the pressure sensor to determine vertical speed corresponding to the change in elevation; and display for reporting the vertical speed to a user. System assesses athletic performance, comprising: protective housing configured for attachment to a human-powered sport vehicle; GPS sensor configured with the housing for generating earth position signals; microprocessor configured with the housing for processing the signals to determine speed and distance traveled of the sport vehicle; and display configured with the housing for displaying one or both of the speed and distance traveled to a user of the human-powered sport vehicle.

Abstract: A location measurement system comprises: a GPS receiver for attachment to a person and for determining earth location of the person; a display for attachment to the person; memory for storing map data; a processor configured to process earth location and the map data to instruct display the person's current location with a map on the display. Other GPS systems for example determine speed with or without map capability or altimeters.