A validated dynamic model of a golf driver can be an invaluable asset in designing a well performing club. We present a model for simulating the golf drive that includes experimentally-measured inputs from actual golfers, and a three-dimensional (3D) flexible shaft model based on Rayleigh beam theory. The result is a computationally-efficient dynamic model that includes the “signature” of an in...

In this work, we present a concatenated repetitionpolar coding scheme that is aimed at applications requiring highly unbalanced unequal bit-error protection, such as the Beam Interlock System of the Large Hadron Collider at CERN. Even though this concatenation scheme is simple, it reveals significant challenges that may be encountered when designing a concatenated scheme that uses a polar code ...

The feasibility of designing a compact-size beam-switching dielectric lens antenna (DLA) with improved angular (scanning) characteristics is investigated numerically using in-house software based on the Muller boundary integral equations and hybrid genetic algorithm. It is demonstrated that joint optimization of the lens shape and feeding array parameters enables one to minimize the directivity...

High precision modeling of space-charge effects is essential for designing future accelerators as well as optimizing the performance of existing machines. Synergia is a highfidelity parallel beam dynamics simulation package with fully three dimensional space-charge capabilities and a higher-order optics implementation. We describe the Synergia framework, developed under the auspices of the DOE ...

Electron yield was measured from patterned carbon nanotube forests for a wide range of primary beam energies (400-20,000 eV). It was observed that secondary and backscattered electron emission behaviors in these forests are quite different than in bulk materials. This seems to be primarily because of the increased range of electrons due to the porous nature of the forests and dependent on their...

A procedure for designing and fabricating holograms which are used for generating free space optical interconnections is described. The design process uses the Gerchberg-Saxton algorithm and a random search (simulated annealing) method. Fabrication is performed by electron beam lithography and acetone etch of a polymethyl methacrylate film. The use of holograms fabricated by this method in an o...

In this paper, we would like to propose a new microring resonator structure based on 6x6 Generalized Mach Zehnder interferometer (GMZI) using silicon waveguides. It is showed that this new kind of the devices works as three separated microring resonators. This characteristic of the device leads to a variety of tasks important to optical communications, including switching, filtering, add-drop m...

In this article we propose the perspective of relationship as a conceptual approach to discipline sound design. Based on literature reviews and case studies, state that making design means designing relationships, even before sounds, include expression in current definitions discipline. Moreover, observe practices can be inscribed more than one relational perspective, thus widening scope possib...