Frequency Response of Disordered Periodic Structures
A computational procedure is given for calculating the frequency response of disordered periodic structures based on wave propagation theory. An ideal periodic structure is composed of...
Flow in a Model Symmetric Bifurcation
Flow through bifurcations is of particular interst to the field of hemodynamics and respiration dynamics. In this paper flow through a model symmetric bifurcation is studied experimentally...
Roll-Waves on a Non-Newtonian Mud Layer
This article extends the theory of roll-waves due to Dressler (1949) to a thin layer of mud modeled as a power law fluid. Roll-waves are periodic bores moving at a constant velocity down...
Unconfined Granular Materials Thermalized by Fluctuating Horizontal Surfaces
We calculate the solid fraction and granular temperature throughout assemblies of identical, smooth, inelastic spheres that are unconfined from above and thermalized from below by bumpy,...
A New NDT Device for Comprehensive Pavement Maintenance (Theoretical Aspects)
A new nondestructive testing (NDT) device is being developed to detect some precursors to pavement distress. The principle of operation of the device is based upon the generation and detection...
Integrity Testing of Concrete Elements Using Surface Waves
The Spectral Analysis of Surface Waves (SASW) method is a nondestructive testing procedure which has been extensively used to determine in situ the elastic moduli of soils and pavements...
Scattering of Waves by Steel Reinforcement in Concrete
The application of wave-sensing methods to the non-destructive evaluation of concrete structures requires often the use of simple (or at least tractable) models for the solution of the...
Pattern Formation and Time-Dependence in Flowing Sand
The authors present results for a number of experiments on flowing granular materials and a novel cellular automata model for the flow of these materials when the grains are long and thin....
The Proposed NASA Lunar-Based Astronomical Observatories
The goals of the Space Exploration Initiative are a manned return to the Moon, a permanent lunar outpost and then a manned expedition to Mars. This presents an opportunity to construct...
SALSA: A Lunar Submillimeter-Wavelength Array
A conceptual design is described for a lunar submillimeter-wavelength interferometer called SALSA, a Synthesis Array for Lunar Submillimeter Astronomy. The intent is to describe SALSA...
Low Frequency Astronomy from Lunar Orbit
The Radio Astronomy Explorer satellite verified that the far-side of the Moon is well shielded from manmade and natural Earth-based interference at frequencies below 30 MHz. Above a few...
In-Flight Calibration of Mass Spectrometer
A new device for in-flight calibration of mass spectrometer is presented. At a ground station command the calibrator introduces a constant and reproducible amount of deuterium into the...
Field Verification of a Wave-Induced Current Model
A unique data set of nearshore waves and current measurements over a bar-trough bathymetry was collected during a field experiment at Duck, NC, in October 1990. These high-quality data...
A PC Modelling System for the Simulation of Transport and Fate of Solutes and Suspended Substances
PARTICLE is a numerical computer model for the simulation of transport and fate of discharged, dissolved or suspended substances. The model is based upon the Lagrangian approach and calculates...
Preliminary Circulation Simulations in Apalachicola Bay
A three-dimensional, time-dependent ocean circulation model utilizing an orthogonal, curvilinear horizontal grid is being adapted to Apalachicola Bay to study the dynamics of the salinity...
Water Quality Modelling: Prediction of the Transport of Water Constituents in the Weser Estuary (Germany)
Water quality monitoring of the Weser estuary is carried out in conjunction with numerical modelling of the transport processes. For analytical and prognostical studies, and especially...
Simulation of Three-Dimensional Hydrodynamics in Long Island Sound: Seasonal Timescale
The Mellor-Blumberg three-dimensional hydrodynamic model, as modified by National Ocean Service (NOS) of National Oceanic and Atmospheric Administration (NOAA) for application to Long...
Simulation of Three-Dimensional Hydrodynamics in Long Island Sound: Annual Timescales
The Mellor-Blumberg three-dimensional hydrodynamic model in application to Long Island Sound includes time varying water level residual, sea surface temperature, river inflow, and wind...
3D Hydrodynamic Model Validation Through Simulations of Dynamic Processes
Two test cases with idealized geometry and forcing functions were performed to validate a three dimensional hydrodynamic model for use in coastal waters. The tests involve the barotropic...
Tide and Hurricane Storm Surge Computations for the Western North Atlantic and Gulf of Mexico
The development of a finite element (FE) model to study tides and hurricane storm surge in the Western North Atlantic and Gulf of Mexico is discussed. Issues that are emphasized include...
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