Abstract: An actuator and control algorithm which provide an operator with the ability to intuitively and responsively maneuver heavy work-pieces with ease and precision. The structure of the apparatus may provide a hoist with a compliant sensing system to measure the weight of the payload. The compliant sensing system may result in smaller dead-bands than are realizable with traditional force sensing methods. At the command of the user, the control algorithm may switch between two distinct operational modes: float mode and manual mode. In float mode, the hoist actively counterbalances the weight of the load, allowing it to feel substantially weightless in the operator's hands. The operator can apply forces directly to the payload to accelerate it in the desired vertical direction. Because of the small dead-band realized with compliant sensing, the payload may be highly responsive to the operators force inputs. As a result, the payload may be intuitively maneuvered at very high speeds, as well as very low speeds.

Abstract: A system for allowing users to present themselves to an on-line market with a number of information "veils" which, upon removal, reveal increasing levels of confidential information relating to the business being sold (if a seller) or sought (if a buyer). As prospective buyers (or sellers) consider entering into negotiations with prospective sellers (or buyers), the parties remove the veils one at a time, sequentially affording each complete control over the rate, quantity, and nature of information revealed to the other. The communications are specific between two parties and either party can terminate the communication at any point in the process. Each step is controlled by the user, but executed through the central CBeX System. All veil information concerning system users is directly loaded by the users into the system.