The human eye can resolve stripes spaced 1 minute of arc (1/60 of 1°) apart; this is many times better than the compound eye of a bee, which can resolve objects spaced about 2.8° 5.4° apart.
After his death, although there was a political struggle with Tycho's heirs, Kepler was ultimately able to work with data accurate to within 2′ of arc.
Sometimes both rectangles travelled slowly, at just over 3º of arc a second from the observer's point of view, as a ship might.
Sometimes both rectangles travelled slowly, at just over 3º of arc a second from the observer's point of view, mimicking a ship.
The Ba/La ratio of the tuff ranges from 19.5 to 25.8, which corresponds to the range (Ba/La = 8.0 13.5) of arc volcanoes (Gill, 1981).
If the responses had been based on the duration of presentation, then two stimuli with the same duration (e.g., a slower moving reference stimulus traversing 2° of arc and a faster moving test stimulus traversing 5° of arc) would have generated equivalent percepts.
In this study, a cluster width of 60° of arc was used in cluster analysis.
Each cluster contained all the conformations each of whose conformation-governing rotatable bonds is within ± 30° of arc of the average torsion of all conformations in the cluster.
Vessel sprouting was measured as clock hours, the contiguous circumferential zone of the neovascularization, using a 360° reticule (where 30° of arc equals one clock hour).
The torsional restraints used by the module were set as parabolic to the designated angle ±40° of arc and linear sides beyond that torsion range.
The torsional restraints used by the INTERFACE module were set as parabolic to the designated angle ± 40° of arc and linear sides beyond that torsion range.
