Abstract: Piezoelectric harvesting devices are disclosed herein. An embodiment of a harvesting device includes a cantilever having a resonant frequency associated therewith, wherein the cantilever vibrates when in the presence of a vibration source, and wherein the harvesting device generates a current upon vibration of the cantilever. The generated current is present at an output. A bias flip circuit is used to tune the resonant frequency of the harvesting device based on measurements of the vibration source that causes the cantilever to vibrate, wherein the bias flip circuit includes a switch that connects and disconnects an inductor to the output.

Abstract: Flowing electrolyte batteries capable of being selectively neutralized chemically; processes of selectively neutralizing flowing electrolyte batteries chemically; and processes of selectively restoring the electrical potential of flowing electrolyte batteries are disclosed herein.

Abstract: A location measurement system including 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: Piezoelectric harvesting devices are disclosed herein. An embodiment of a harvesting device includes a cantilever having a resonant frequency associated therewith, wherein the cantilever vibrates when in the presence of a vibration source, and wherein the harvesting device generates a current upon vibration of the cantilever. The generated current is present at an output. A bias flip circuit is used to tune the resonant frequency of the harvesting device based on measurements of the vibration source that causes the cantilever to vibrate, wherein the bias flip circuit includes a switch that connects and disconnects an inductor to the output.

Abstract: A system assesses and displays activity of a sportsman. At least one sensor detects movement of the sportsman, and a processor processes data from the sensor to assess activity of the sportsman. A heads-up display mounted with a pair of goggles or glasses displays data indicative of the activity to the sportsman.

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: Flowing electrolyte batteries capable of being selectively neutralized chemically; processes of selectively neutralizing flowing electrolyte batteries chemically; and processes of selectively restoring the electrical potential of flowing electrolyte batteries are disclosed herein.

Abstract: A system assesses and displays activity of a sportsman. At least one sensor detects movement of the sportsman, and a processor processes data from the sensor to assess activity of the sportsman. A heads-up display mounted with a pair of goggles or glasses displays data indicative of the activity to the sportsman.

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 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 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 assesses activity of a sportsman engaged in board sports. At least one sensor detects movement of the sportsman, and a processor processes data from the sensor to assess activity of the sportsman. Activity of sportsmen engaged in human powered sports is compared. A plurality of activity sensing units is associated with the sportsman. Each of the units (a) attach to one of either the sportsman or to a human powered vehicle ridden by the sportsman, and (b) wirelessly communicate activity to a remote location. The activity comprising one or more of airtime, speed, drop distance, power and energy absorbed. A database, accessible by Internet and connected to the remote location, provides access to the activity via the Internet.

Abstract: Flowing electrolyte batteries capable of being selectively neutralized chemically; processes of selectively neutralizing flowing electrolyte batteries chemically; and processes of selectively restoring the electrical potential of flowing electrolyte batteries are disclosed herein.

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 assesses activity of a sportsman engaged in board sports. At least one sensor detects movement of the sportsman, and a processor processes data from the sensor to assess activity of the sportsman. Activity of sportsmen engaged in human powered sports is compared. A plurality of activity sensing units is associated with the sportsman. Each of the units (a) attach to one of either the sportsman or to a human powered vehicle ridden by the sportsman, and (b) wirelessly communicate activity to a remote location. The activity comprising one or more of airtime, speed, drop distance, power and energy absorbed. A database, accessible by Internet and connected to the remote location, provides access to the activity via the Internet.

Abstract: Flowing electrolyte batteries capable of being selectively neutralized chemically; processes of selectively neutralizing flowing electrolyte batteries chemically; and processes of selectively restoring the electrical potential of flowing electrolyte batteries are disclosed herein.

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 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.