Abstract: Systems and methods for conducting a videoconference including receiving multimedia streams of a plurality of participants in a multimedia conference, the multimedia streams including audio components and video components and displaying video tiles of the participants on a display screen. The audio components and/or the video components of the multimedia streams are analyzed to detect characteristics indicative of a first participant and a second participant having a first conversation with each other. Camera positions on the computing devices of the participants are identified. In response to identifying that the first participant and the second participant are having the first conversation with each other, a video tile for the first participant and a video tile for the second participant are moved to edges of the respective display screens toward the camera positions.

Abstract: A sensor device includes a first antenna configured to receive an interrogation radio frequency (RF) signal; a first sensor configured to detect a first state of a first sensed signal, to output a first sensor signal responsive to the first state meeting a first threshold condition; a first circuit coupled to the first antenna, the first circuit configured to receive the interrogation RF signal from the first antenna, modulate a second RF signal, and transmit the modulated second RF signal as a RF response signal; and a first tag controller configured to receive the first sensor signal and to selectively connect or disconnect the first antenna to or from ground responsive to the first sensor signal, wherein connecting the first antenna to ground prevents the first antenna from transmitting the RF response signal.

Abstract: A sensor device includes a first antenna configured to receive an interrogation radio frequency (RF) signal; a first sensor configured to detect a first state of a first sensed signal, to output a first sensor signal responsive to the first state meeting a first threshold condition; a first circuit coupled to the first antenna, the first circuit configured to receive the interrogation RF signal from the first antenna, modulate a second RF signal, and transmit the modulated second RF signal as a RF response signal; and a first tag controller configured to receive the first sensor signal and to selectively connect or disconnect the first antenna to or from ground responsive to the first sensor signal, wherein connecting the first antenna to ground prevents the first antenna from transmitting the RF response signal.