SCORES (SpaceCraft Object-oriented Rocket Engine Simulation) is an analysis tool being developed for conceptual-level spacecraft and launch vehicle design. Written in C++, SCORES provides rocket thrust and Isp for propulsion system trade studies. Common gateway interface scripts, written in Perl, provide an interface with the World Wide Web. The design parameters used in SCORES are mixture rati...

The hemisphere soft function is calculated to order αs. This is the first multi-scale soft function calculated to two loops. The renormalization scale dependence of the result agrees exactly with the prediction from effective field theory. This fixes the unknown coefficients of the singular parts of the two-loop thrust and heavy-jet mass distributions. There are four such coefficients, for 2 ev...

The ultrasonic velocity, density and refractive indices have been measured for systems at 303.15, 308.15, 313.15, 318.15 and 323.15 K. From the experimental data adiabatic compressibility (βs), intermolecular free length (L f ), internal pressure (π), acoustic impedance (Z), molar refraction (Rm), Polarisability, (αp), thermal expansion coefficient (α), Rao’s molar sound function (R), solvation...

Formation flight can result in large induced drag reductions. Optimum spanloads for a group of aircraft flying in an arrow formation were found using a discrete vortex method with a Trefftz plane analysis under constraints in lift, pitching moment and rolling moment coefficients. It has been shown that large reductions in induced drag can be obtained when the spanwise and vertical distances bet...

We present a model for next-to-leading order resummed threshold form factors based on a time-like coupling. Since the latter acts as a regulator for Landau-pole singularities, our form factors are regular for any value of the Mellin variable N ; they reduce to the standard ones when absorptive parts related to the coupling are neglected. e-mail address: [email protected] e-mail address...

Both numerical and experimental studies were conducted to evaluate the performance of an omni-flow wind turbine designed to provide renewable electricity on the top of urban buildings like skyscrapers. The numerical approach was based on Finite Volume Method (FVM) and the turbulence flow was studied with several commonly used Reynoldsaveraged Navier-Stokes turbulence models. The results of the ...

[1] The development of topography within and erosional removal of material from an orogen exerts a primary control on its structure. We develop a model that describes the temporal development of a frontally accreting, critically growing Coulomb wedge whose topography is largely limited by bedrock fluvial incision. We present general results for arbitrary initial critical wedge geometries and in...

We present a new three-dimensional inventory of the southern San Francisco Bay area faults and use it to calculate stress applied principally by the 1989 M = 7.1 Loma Prieta earthquake and to compare fault seismicity rates before and after 1989. The major high-angle right-lateral faults exhibit a different response to the stress change than do minor oblique (right-lateral/thrust) faults. Seismi...

In this paper, a combined use of dimensional analysis (DA) and modern statistical design of experiment (DOE) methodologies is proposed for a hydrodynamics experiment where there are a large number of variables. While DA is well-known, DOE is still unfamiliar to most ocean engineers although it has been shown to be useful in many engineering and non-engineering applications. To introduce and ill...