In this paper we describe the development of a three-dimensional (3D) imaging system for a 3500 tonne mining machine (dragline). Draglines are large walking cranes used for removing the dirt that covers a coal seam. Our group has been developing a dragline swing automation system since 1994. The system so far has been “blind” to its external environment. The work presented in this paper attempt...

The novel fixed (non-vibrating) Volta potential probe was evaluated in comparison with the standard, vibrating (400 Hz) commercial Kelvin probe. While both tested probes demonstrated the similar behavior, there were significant practical advantages of the novel probe. Specifically, the novel probe allows for the elevated distance to the surface and provides more sensitivity to charge under the ...

This study details an optimization of the golf swing, where the hand path and club angular trajectories are manipulated. The optimization goal was to maximize club head velocity at impact within the interaction kinetic limitations (force, torque, work, and power) of the golfer as determined through the analysis of a typical swing using a two-dimensional dynamic model. The study was applied to f...

Pricing options on electrical power is important because of the worldwide trend toward deregulated electricity markets. It is fascinating because of the exotic nature of most power derivatives and because of the many unique features of electricity markets. One of these unique features is that electrical power cannot, in appreciable quantities, be stored. While this plays havoc with arbitrage-fr...

Swing options give contract holders the right to modify amounts of future delivery of certain commodities, such as electricity or gas. We assume that these options can be exercised at any time before the end of the contract, and more than once. However, a recovery time between any two consecutive exercise dates is incorporated as a constraint to avoid continuous exercise. We introduce an effici...

By pure analogy with a usual three-dimensional origami, we can fold a regular octahedral material along flat faces in 4-space. The octahedron comprises four congruent tetrahedra. We will show a procedure to fold a tetrahedron along bisectors of the dihedral angles. This procedure demonstrates that each two of four surfaces of the given tetrahedron coincide with each other and that the point of ...

Twenty percent of the 6,400,000 stroke survivors alive today [1] are unable to dorsiflex the ankle [2], causing the foot to drag along the floor during swing. This can limit mobility, increasing instability and risk of tripping or falling [3]. The traditional treatment for foot drop is an ankle foot orthosis that holds the ankle in a neutral position during swing, preventing toe drag. An altern...

We describe a structure of model for shortterm swing dynamics of multi-machine power grids, exhibiting an instability phenomenon termed the Coherent Swing Stability (CSI). This model is based on the swing equations with a linear term representing the interconnection between synchronous machines in a power grid. We analyze the New England 39-bus test system exhibiting CSI and show that the pheno...

Analytical models for channel potential, threshold voltage, and subthreshold swing of the short-channel fin-shaped field-effect transistor (FinFET) are obtained. The analytical model results are verified against simulations and good agreements are observed. Analytical expressions for subthreshold swing, drain induced barrier lowering effect, and threshold voltage roll-off characteristics are pr...

I. LOWER-EXTREMITY PROSTHETICS A. Basic Studies Preformed Thermoplastic Above-Knee Sockets B. Development (Components) 1. SACH Foot Modificaion 2. VAPC Modular Foot C. Development (Techniques) Cosmetic Finishing for Skeletal Prostheses D. Evaluation (Components) 1. Blatchford Stabilized Knee (BSK) 2. Hosmer Pneumatic Swing Control Knee 3. Regnell Swing and Stance Mechanism 4. U.S. Manufacturing...