A mobile electronic device includes a wireless communications interface configured to receive, from a remote device, a sequence of remote device proximity indicators. The sequence of remote device proximity indicators indicate positions of the remote device. A mobile proximity detector of the mobile electronic device is configured to monitor a current position and a current velocity of the mobile electronic device; determine, from the sequence of remote device proximity indicators, a current remote device position and current remote device velocity; and determine, using at least the current remote device position and velocity, and the current position and the current velocity of the mobile electronic device, a likelihood of close contact between a user of the mobile electronic device and the remote device. A notification manager of the mobile electronic device is configured to notify the user of the likelihood of close contact.

An apparatus for tracking hand hygiene in a bathroom includes at least a radio and a controller. The radio is configured to receive a direct connection probe from a mobile device. The controller is configured to receive sensor data associated with hand hygiene and match the sensor data associated with hand hygiene with an identifier for the mobile device based on the direction connection probe to determine whether a hand hygiene threshold is met.

An apparatus for tracking hand hygiene in a bathroom includes at least a radio and a controller. The radio is configured to receive a direct connection probe from a mobile device. The controller is configured to receive sensor data associated with hand hygiene and match the sensor data associated with hand hygiene with an identifier for the mobile device based on the direction connection probe to determine whether a hand hygiene threshold is met.

Determining a vertical location of a hand-held computing device. At least some of the example embodiments are computer-implemented methods including: generating an estimate of expected vertical location based on items of beacon data received from beacons by a radio receiver of the hand-held computing device, generating an error covariance of the estimate of expected vertical location based on the items of beacon data, calculating a level normalized change based on measurements of barometric pressure by a pressure sensor of the hand-held computing device, calculating the vertical location of the hand-held computing device based on the level normalized change, the error covariance of the estimate of expected vertical location, and the estimate of expected vertical location, and activating a relevant map for a level comprising the vertical location and displaying the vertical location on a display device of the hand-held computing device.

A method for aligning displayed data in an augmented reality (AR) display includes determining a selected location context associated with a piece of equipment, determining a process element associated with the piece of equipment and according to a selected engineering process, determining, according to a digital representation of the equipment, a first location of the process element, receiving meta-sensor location data for one or more meta-sensors in the piece of equipment and indicating a second location for each of the meta-sensors with respect to the selected location context, determining a third location of the AR display with respect to the selected location context, determining overlay data for the process element, determining a display location according to the first location, the third location and the location data of each meta-sensor, and displaying the overlay data at the display location.

A method for aligning displayed data in an augmented reality (AR) display includes determining a selected location context associated with a piece of equipment, determining a process element associated with the piece of equipment and according to a selected engineering process, determining, according to a digital representation of the equipment, a first location of the process element, receiving meta-sensor location data for one or more meta-sensors in the piece of equipment and indicating a second location for each of the meta-sensors with respect to the selected location context, determining a third location of the AR display with respect to the selected location context, determining overlay data for the process element, determining a display location according to the first location, the third location and the location data of each meta-sensor, and displaying the overlay data at the display location.

A method for aligning displayed data in an augmented reality (AR) display includes determining a selected location context associated with a piece of equipment, determining a process element associated with the piece of equipment and according to a selected engineering process, determining, according to a digital representation of the equipment, a first location of the process element, receiving meta-sensor location data for one or more meta-sensors in the piece of equipment and indicating a second location for each of the meta-sensors with respect to the selected location context, determining a third location of the AR display with respect to the selected location context, determining overlay data for the process element, determining a display location according to the first location, the third location and the location data of each meta-sensor, and displaying the overlay data at the display location.

A method for aligning displayed data in an augmented reality (AR) display includes determining a selected location context associated with a piece of equipment, determining a process element associated with the piece of equipment and according to a selected engineering process, determining, according to a digital representation of the equipment, a first location of the process element, receiving meta-sensor location data for one or more meta-sensors in the piece of equipment and indicating a second location for each of the meta-sensors with respect to the selected location context, determining a third location of the AR display with respect to the selected location context, determining overlay data for the process element, determining a display location according to the first location, the third location and the location data of each meta-sensor, and displaying the overlay data at the display location.

Example methods and systems described herein relate to determining average arrival time of a radio wave emitted by a lightning discharge and/or determining the lobe and/or polarity of the radio wave. The determination of the average arrival time may take a weighted average of arrival times of peaks of the radio wave. The determination of the lobe and/or polarity may depend on an estimated propagation distance, a propagation path profile, and one or more waveform features.

A method for aligning displayed data in an augmented reality (AR) display includes determining a selected location context associated with a piece of equipment, determining a process element associated with the piece of equipment and according to a selected engineering process, determining, according to a digital representation of the equipment, a first location of the process element, receiving meta-sensor location data for one or more meta-sensors in the piece of equipment and indicating a second location for each of the meta-sensors with respect to the selected location context, determining a third location of the AR display with respect to the selected location context, determining overlay data for the process element, determining a display location according to the first location, the third location and the location data of each meta-sensor, and displaying the overlay data at the display location.