Elimination of redundancy in telemetered data

Procedure for estimating the intensity of a Poisson process can be readily programmed for a digital computer, and does not require an a priori probability space. Reduction of the sampling rate is possible without sacrificing significant information

Car Racing Game

This project is a racing and car collecting video game, which can be played by one or more players. A player can buy cars, upgrade owned cars, tune owned cars, and use owned cars to race for money to buy, upgrade, and tune cars. The game runs on a personal computer in a Windows environment and can be played with keyboard, mouse, or a joystick. It can also be ported to other platforms such as Android or iOS. It was developed using Unity3D 5.4 Game Engine and features 3D graphic and physic simulation

Bringing Together Gravity and the Quanta

Due to its underlying gauge structure, teleparallel gravity achieves a separation between inertial and gravitational effects. It can, in consequence, describe the isolated gravitational interaction without resorting to the equivalence principle, and is able to provide a tensorial definition for the energy-momentum density of the gravitational field. Considering the conceptual conflict between the local equivalence principle and the nonlocal uncertainty principle, the replacement of general relativity by its teleparallel equivalent can be considered an important step towards a prospective reconciliation between gravitation and quantum mechanics.Comment: 9 pages. Contribution to the proceedings of the Albert Einstein Century International Conference, Paris, 18-22 July, 200

State of the States 2009

Highlights state election results and policy developments in 2008 and projects trends for 2009. Considers how the recession and the new administration's policies may affect states on energy, education, Medicaid, the social safety net, and other issues

Two-photon spectroscopy of trapped HD+^+ ions in the Lamb-Dicke regime

We study the feasibility of nearly-degenerate two-photon rovibrational spectroscopy in ensembles of trapped, sympathetically cooled hydrogen molecular ions using a resonance-enhanced multiphoton dissociation (REMPD) scheme. Taking advantage of quasi-coincidences in the rovibrational spectrum, the excitation lasers are tuned close to an intermediate level to resonantly enhance two-photon absorption. Realistic simulations of the REMPD signal are obtained using a four-level model that takes into account saturation effects, ion trajectories, laser frequency noise and redistribution of population by blackbody radiation. We show that the use of counterpropagating laser beams enables optical excitation in an effective Lamb-Dicke regime. Sub-Doppler lines having widths in the 100 Hz range can be observed with good signal-to-noise ratio for an optimal choice of laser detunings. Our results indicate the feasibility of molecular spectroscopy at the $10^{-14}$ accuracy level for improved tests of molecular QED, a new determination of the proton-to-electron mass ratio, and studies of the time (in)dependence of the latter.Comment: 16 pages, 17 figure

Internal generation of waves with damping using extended Boussinesq equations

It has been known that the waves generated internally propagate with the energy velocity (Lee and Suh 1998; Lee et al. 2001). Until now, this internal wave generation technique has been developed for waves without damping. In real sea, waves may experience energy dissipation when passing through porous media or in surf zone. In this study, we develop techniques of internal generation of waves with damping using the extended Boussinesq equations of Nwogu (1993). Using the Green's function method (Wei et al. 1999), we derive the Gaussian-shaped source functions. Through numerical experiments for linear and nonlinear waves, we find the source functions with damping generate waves accurately