A method and an arrangement for controlling a drive unit make a vehicle speed control possible wherein operating conditions not wanted by the driver are avoided. The lens barrel comprises a first barrel member having a first helicoid formed in a first face, and a second barrel member having a second helicoid formed in a second face confronting the first face. The research project may comprise obtaining information about a goods or services, in which case the method may further comprise the user placing an order for the goods or services through the service provider and the service provider obtaining the goods or services for the user through the information network. The device may be used above ground or in a trench. The WTRU may establish a network connection to the SHO and may receive services using the remotely managed credentials.