An orbit geometry where the central projection ray of the detector is not constrained to pass through the center-of-rotation for all projection angles can be useful to reduce uniformity artifacts and to avoid truncation when imaging non centrally located organs. We present a backprojection filtering algorithm for parallel geometry with an elliptical orbit acquisition and verify the algorithm by...

The Lanczos eigensolution takes the dominant amount of time in most normal modes and modal frequency response analyses. This paper introduces a way to reduce the elapsed time of large eigenvalue jobs by using a newly developed parallel option within the Lanczos algorithm. We will compare the performance of the frequency domain decomposition based distributed memory parallel method introduced in...

This paper presents the singularity analysis of a family of 14 composite serial in-parallel six degree-of-freedom robots, having a common parallel submechanism. The singular configurations of this class of robots are obtained by applying line geometry methods to a single, augmented Jacobian matrix whose rows are Plücker coordinates of the lines governing the submechanism motion. It is shown tha...

I show that, in the geometry of a fiber bundle describing a gauge theory, curvature and parallel transport ensure and impose nonseparability. The "Einstein-Podolsky-Rosen paradox" is thus resolved "classically." I conjecture that the ostentatiously "implausible" features of the quantum treatment are due to the fact that space-time separability, a basic assumption of single-particle nonrelativis...

Application of a single fraction of parallel opposed GRID beams as a means of increasing the efficiency of radiation delivery to deep-seated tumors has been investigated. This evaluation was performed by measurement of dosimetric characteristics of the GRID radiation field in parallel opposed and single beam geometry. The limitations of the parallel opposed technique in terms of field size and ...

We describe a novel load-balancing method for sort-first parallel graphics rendering systems. It gives up geometry data which could be very large and tends to cause unacceptable cost. Instead it takes rendering time as the measurement of render nodes’ work load and produces new screen decomposition using a time-to-space algorithm. Test results show that the geometry data independent method is v...

Applications of genetic algorithms to the global geometry optimization problem of nanoparticles are reviewed. Genetic operations are investigated and importance of phenotype genetic operations, considering the geometry of nanoparticles, are mentioned. Other efficiency improving developments such as floating point representation and local relaxation are described broadly. Parallelization issues ...

We present two novel dressed inductive ring trap geometries, ideal for atom interferometry or studies of superfluidity and well-suited to utilisation in atom chip architectures. The design permits ring radii currently only accessible via near-diffraction-limited optical traps, whilst retaining the ultra-smooth magnetic potential afforded by inductive traps. One geometry offers simple parallel i...

Photoelasticity is a fast and powerful technique for internal stress detection quality control in crystals; to fully exploit its possibilities, an appropriate theoretical analysis must be developed different crystallographic structure observation planes. For cubic crystal specimen whose geometry non-coherent with directions (i.e., planes are not parallel), we write set of equations that allow e...

We introduce a visual motion segmentation method employing spherical geometry for fisheye cameras and automated driving. Three commonly used geometric constraints in pin-hole imagery (the positive height, depth epipolar constraints) are reformulated to coordinates, making them invariant specific camera configurations as long the calibration is known. A fourth constraint, known anti-parallel add...