Dehn surgery is perhaps the most common way of constructing 3-manifolds, and yet there remain some profound mysteries about its behaviour. For example, it is still not known whether there exists a 3-manifold which can be obtained from S by surgery along an infinite number of distinct knots. 1 (See Problem 3.6 (D) of Kirby’s list [9]). In this paper, we offer a partial solution to this problem, ...

The introduction of 3-D modeling with probabilistic encoding of occupancy state of space leaded to the development of powerful tools to generate rich representations of environments. But the sophistication of the modeling scheme introduces important concerns in the way such representations can be efficiently displayed to human operators for validation purpose and decision making in the guidance...

Manipulating the Space Station Remote Manipulator (SSRMS) on the International Space Station (ISS) is a very challenging task. The operator does not have a direct view of the scene of operation and must rely on cameras mounted on the manipulator and at strategic places of the environment where it operates. In this paper, we describe how a new approach for robot path planning called FADPRM can b...

Over the past decade across high-income countries such as Canada and Australia and regions such as Western Europe an unexpected and disturbing trend has emerged—an increase in syphilis and HIV infections among men who have sex with men (MSM). Now researchers in Israel have found similar trends in HIV in that country. Furthermore, researchers there have found another troubling trend: A significa...

An infrared (IR) transcutaneous remote control was designed for use in the totally implantable middle ear system. Considering the IR reflection, absorption and scattering effect of the skin, the required IR radiant intensity is calculated. After we have implemented the designed control, the transcutaneous operation experiment was carried out using a porcine skin. key words: implantable middle e...

Experimentation has always been an essential ingredient to sustain the learning activities in engineering education. During traditional laboratory sessions, a huge amount of work is carried out by the assistant who is in charge of supporting and evaluating the students. In a Web-based experimentation setting students ask for more feedback while they work on simulation or remote manipulation. We...

In case of engine failure, skilled pilots can save a helicopter from crashing by executing an emergency procedure known as autorotation. In autorotation, rather than relying on the engine to drive the main rotor, the pilot has to control the helicopter such that potential energy from altitude is transferred to rotor speed. In fact, maintaining a sufficiently high rotor speed is critical to reta...