A semiconductor device includes a plurality of first conductive patterns separated by a damascene pattern, a second conductive pattern buried in the damascene pattern, and a spacer including an air gap between the second conductive pattern and the first conductive patterns. The exercise weight has a relatively narrow profile, or width, to avoid contact with the body during exercise. The MS can encrypt the SNMP configuration file and transmit it to the AS which can then decrypt the encrypted SNMP configuration file to generate the SNMP authentication keys and the SNMP privacy keys. The control system is coupled to the plurality of LED lights and operable to independently control each LED light to produce at least one of a 360\xb0 strobe light pattern and a rotating beacon light pattern. The device includes an optical AND gate, which has a first input arranged to receive a chirped pulse having a duration T, and whose wavelength varies in a monotonically over the duration of the pulse, the node having a second input arranged to receive a second data pulse. An example system disclosed herein includes a name-server evaluator to determine capacities of the plurality of name-servers, a provisioner to compute profile assignment values based on a plurality of subscriber identifiers, and an assignor to assign the subscriber identifiers to one of the plurality of name-servers based on the profile assignment values and the capacities.