This invention provides methods of inducing a protective or therapeutic immune response to Helicobacter infection in a mammal by parenterally administering to the mammal one or more Helicobacter antigens and an adjuvant selected from one or more of LT, CT, LTB, and CTB. The electronic control device provides an operation interface to the electronic device, and receives a function instruction from the electronic device if a function key on the operation interface is pressed. In general, resolution is substantially improved with cone beam and helical data without a large increase in noise. The visual keying system provides the user with an early indication that the particular device is not supported by a power source. A hydro bearing interconnects the stationary member and the rotatable member and includes a lubricating fluid having a base fluid and an additive andor a combination of additives or base fluids for reducing the temperature dependency of the viscosity of the lubricating fluid.