We present a scheme of nonmechanical laser beam steering using ZnS/InP quantum dots doping nematic liquid crystal as the optical recording film. Because of its internal electric field generated by blue laser-induced charge carrier distribution, liquid crystal molecules are reoriented to form a phase grating which make the incident angle steer to the angle as we desire. Being a nonmechanical pro...

We present a simple and intuitive method for encapsulating part of agents’ steering and coordinating abilities into a new class of agents, called situation agents. Situation agents have all the abilities of typical agents. In addition, they can influence the steering decisions of any agent, including other situation agents, within their sphere of influence. Encapsulating steering logic into mov...

We investigate the steerability of two-qubit Bell-diagonal states under projective measurements by the steering party. In the simplest nontrivial scenario of two projective measurements, we solve this problem completely by virtue of the connection between the steering problem and the joint-measurement problem. A necessary and sufficient criterion is derived together with a simple geometrical in...

A parafoil controlled by parafoil brake de ection offers a lightweight and space-efŽ cient control mechanism for autonomous placement of air-dropped payloads to speciŽ ed ground coordinates. The work reported here investigates control issues for a parafoil and payload system with left and right parafoil brakes used as the control mechanism.It is shown thatparafoilandpayloadsystems can exhibit ...

The neural mechanisms underlying primate locomotion are largely unknown. While behavioral and theoretical work has provided a number of ideas of how navigation is controlled, progress will require direct physiolgical tests of the underlying mechanisms. In turn, this will require development of appropriate animal models. We trained three monkeys to track a moving visual target in a simple virtua...

In this paper we describe the steering, suspension and control systems of the rover Zoë, a solar-powered robot designed to explore the Mars-like landscapes of the Atacama Desert in Chile. We are developing the Zoë chassis as an alternative to the traditional six-wheeled, rocker-bogie system used by Mars rovers flown in the past ten years. Zoë travels over rough terrain using only four independe...

This report is exploring the advantages and disadvantages with some common sensors needed when positioning a mobile robot with Ackerman steering. Both absolute and relative methods are explored. Odometry based on measuring traveled distance and steering angle is tested and adjusted to obtain the best performance. A Kalman filter is constructed to improve steering angle measurements. The tests a...