Athenian cultural dominance continued throughout the Roman period, and the buildings added to the Agora reflect the educational role of the city, a role that ended only with the closing of the pagan philosophical schools by the Christian emperor Justinian in A.D. 529.
Bearing, in machine construction, a connector (usually a support) that permits the connected members to rotate or to move in a straight line relative to one another. Often one of the members is fixed, and the bearing acts as a support for the moving member. Most bearings support rotating shafts against either transverse (radial) or thrust (axial) loads.
A bearing is a horizontal angle measured. from north (either magnetic north or true north) to some point (either a point on a map or a point in the real world) (see Figure 6.8). Bearings are used to accurately travel to a destination or to locate your position. This is magnetic north (marked as MN on a topographic map). 2  Figure 6.7 shows the magnetic lines for the United States (as of 1985). 3  If you locate yourself at any point in the U.S., your compass will orient itself parallel to the lines of magnetic force in that area.