Abstract: A method is described for processing keyed data items that are each associated with a value of a key, the keyed data items being from a plurality of distinct data streams, the processing including collecting the keyed data items, determining, based on contents of at least one of the keyed data items, satisfaction of one or more specified conditions for execution of one or more actions and causing execution of at least one of the one or more actions responsive to the determining.

Abstract: One aspect of the technology involves a system for measuring the rotational position of a rotating shaft, including a field source configured to generate a measurable field, a sensor configured to measure the generated field, and a target that is configured to modify the generated field as measured by the sensor to have a shape with (a) at least one measurable feature for a zero reference point, and (b) a shape that varies throughout one or more angles such that a rotational position of the shaft is determined with a selected angular accuracy. There is also a device that receives a query for the rotational position of the shaft a device that responds to the query. Another aspect involves generating multi-frequency vibrations with a single linear resonant actuator (LRA). This LRA can exhibit a beat pattern in response to being driven by the sum of two different sinusoidal functions.

Abstract: One aspect of the technology involves a system for measuring the rotational position of a rotating shaft, including a field source configured to generate a measurable field, a sensor configured to measure the generated field, and a target that is configured to modify the generated field as measured by the sensor to have a shape with (a) at least one measurable feature for a zero reference point, and (b) a shape that varies throughout one or more angles such that a rotational position of the shaft is determined with a selected angular accuracy. There is also a device that receives a query for the rotational position of the shaft a device that responds to the query. Another aspect involves generating multi-frequency vibrations with a single linear resonant actuator (LRA). This LRA can exhibit a beat pattern in response to being driven by the sum of two different sinusoidal functions.

Abstract: One aspect of the technology involves a system for measuring the rotational position of a rotating shaft, including a field source configured to generate a measurable field, a sensor configured to measure the generated field, and a target that is configured to modify the generated field as measured by the sensor to have a shape with (a) at least one measurable feature for a zero reference point, and (b) a shape that varies throughout one or more angles such that a rotational position of the shaft is determined with a selected angular accuracy. There is also a device that receives a query for the rotational position of the shaft a device that responds to the query. Another aspect involves generating multi-frequency vibrations with a single linear resonant actuator (LRA). This LRA can exhibit a beat pattern in response to being driven by the sum of two different sinusoidal functions.

Abstract: One aspect of the technology involves a system for measuring the rotational position of a rotating shaft, including a field source configured to generate a measurable field, a sensor configured to measure the generated field, and a target that is configured to modify the generated field as measured by the sensor to have a shape with (a) at least one measurable feature for a zero reference point, and (b) a shape that varies throughout one or more angles such that a rotational position of the shaft is determined with a selected angular accuracy. There is also a device that receives a query for the rotational position of the shaft a device that responds to the query. Another aspect involves generating multi-frequency vibrations with a single linear resonant actuator (LRA). This LRA can exhibit a beat pattern in response to being driven by the sum of two different sinusoidal functions.

Abstract: An instrument cover system for displaying dynamic or static images. A display coating having electronic ink is disposed on a front surface of a guitar body. The display coating is operatively connected to a display processor, which is operatively connected a display memory component adapted to store instructions that causes the processor to perform operations for displaying an image. A first control button is operatively connected to the display processor and functions to change the image on display. A connector component is operatively connected to the display processor and functions to allow the system to connect to a power source or a separate electronic device. The electronic device has a device memory for storing instructions that causes a device processor to perform operations for changing and displaying an image.

Abstract: An exemplary safety device can comprise a guard coupled to a lower end of a support shaft and two arms coupled to the support shaft configured to engage with the inner walls of the meter box. The arms can be adjustable to change the distance they extend from the support shaft, such as by rotating the arms about a central bolt that is fixed relative to the shaft. The arms can have end caps that are configured to contact the inner walls of the meter box to create a frictional resistance holding the device securely within the meter box. The arms can be coupled to the support shaft with an adapter ring that is adjustable along the support shaft to change the vertical position of the arms. The guard can partially surround the angle meter stop and can contain it if it blows off the pipe below it.

Abstract: An exemplary safety device can comprise a guard coupled to a lower end of a support shaft and two arms coupled to the support shaft configured to engage with the inner walls of the meter box. The arms can be adjustable to change the distance they extend from the support shaft, such as by rotating the arms about a central bolt that is fixed relative to the shaft. The arms can have end caps that are configured to contact the inner walls of the meter box to create a frictional resistance holding the device securely within the meter box. The arms can be coupled to the support shaft with an adapter ring that is adjustable along the support shaft to change the vertical position of the arms. The guard can partially surround the angle meter stop and can contain it if it blows off the pipe below it.