Abstract: Techniques are described to manage network-based services and servers within a server cluster. In an implementation, a plurality of sub-groups is formed of servers included in a server cluster. Network-based services are assigned to each of the sub-groups such that at least two of the sub-groups have matching deployments of the network-based services.

Abstract: A cleaning composition is provided which includes a lower alcohol, ultrapure water, a surfactant, 3,5-dimethyl-1-hexyn-3-ol and ammonia solution. This cleaning solution is 100 percent volatile, water-clear, and contains no solids or colloidal matter, in addition to being contaminant- and particulate-free, it is found to leave no detectable residue even if not fully wiped off in a cleaning operation.

Abstract: The photoreceptor cleaning composition is provided which includes a lower alcohol, ultrapure water and a surfactant, 3,5-dimethyl-1-hexyn-3-ol. This cleaning solution is 100% volatile, water-clear, and is found to contain no solids or colloidal matter, in addition to being contaminant- and particulate-free, it is found to leave no detectable residue even if not fully wiped off in a cleaning operation. The most significant property of this photoreceptor cleaning solution is its ability to retard crystallization of the photoreceptor, which has been found to be a major problem with many known photoreceptor cleaning solutions.

Abstract: An electrode structure comprising a tube of substantially electrically insulating material such as glass, having a rounded tip of substantially electrically insulating material such as rubber, which tip has a capillary opening therethrough, encloses a metallic cathode and liquid electrolyte, and that electrode structure is placed with the tip and capillary opening in contact with the surface of a sample conductive substrate having an electrical barrier layer thereon whose thickness is to be measured, and electrical potential is applied between the cathode and sample conductive substrate, which is the anode in the system, and the thickness of the electrical barrier layer is measured as a function of the highest applied voltage that does not produce a pronounced increase in current flow in the system.