The reciprocal social interaction test was performed in a clear-walled, square open arena with dimensions measuring 28×28×20 cm (length, width, height).
Many of these display areas are used for many years; in some manakins, for example, certain cleared arenas have existed continuously for at least 30 years.
Habituation to an open field arena made of clear acrylic sheet (41.25 × 41.25 × 31.25 cm) was measured as a decrement in exploratory locomotor activity over time.
In the experiment described in the paper, a mobile robot was successfully trained to keep clear an arena surrounded by walls by locating, recognizing, and grasping "garbage" objects and by taking collected objects outside the arena.
It rings out loud and clear in ARENA's anthem, sung at party gatherings with much pumping of fists.
Police descended to help clear the arena, even as further chaos erupted in the streets outside.
The testing apparatus consisted of a clear Plexiglas arena (33 × 47 × 17 cm), brightly lit (800 lux).
Mice at P30 were introduced into a 22.5 cm×22.5 clearear plexiglass arena and video-recorded for 20 min using TopScan (CleverSys Inc).
Afterwards, we were kettled in our expensive corral for the post-fight press conference, rather than dashing for the usual media room scrum, as security staff cleared the arena to avoid the sort of trouble that blighted two of Mayweather's three previous appearances here, among 10 on the spin.
The stakes Thursday night were clear, and the arena was thick with tension from the start.
It was not clear whether the arena proposal could be brought to a vote in both chambers on Monday, the legislature's last day.
