Abstract: Methods, systems, computer-readable media, and apparatuses for implementation of a contactless panning gesture are disclosed. In some embodiments, a remote detection device detects synchronized motion of at least two control objects across a control plane. An attached computing device may then adjust a current position of a displayed content in response to detection of the synchronized motion. In certain embodiments, a threshold for variation in the movement of the control objects may be established to determine when to terminate a panning mode. The threshold may vary based on the velocity of the control objects.

Abstract: Signal output means (11) responsive to gas flow and particularly suited for use in gas flow indicator apparatus (10), has first and second pressure-datum valves (24, 25) arranged in downstream order in a gas conduit (16), the second pressure-datum valve (25) being arranged to open at a lower pressure difference than the first pressure-datum valve (24). A flueric amplifier (15) has a power jet port (28) connected to the gas conduit (16) on the upstream side of the first pressure-datum valve (24), opposed control pressure ports (26, 27) connected respectively to a chamber (22) formed between the first and second pressure-datum valves (24, 25) and to the gas conduit (16) downstream of the second pressure-datum valve (25), and a vent port (30) also connected to the gas conduit (16) downstream of the second pressure-datum valve (25). A pressure signal output by the flueric amplifier (15) in response to gas flow through the conduit (16) may be used to trigger a visual or audio warning device (14).