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....
Measuring Vibration in an Advanced Composite Beam with Localized Internal Fiber-Optic Strain Sensors
Two optical fibers embedded with different configurations were used separately as strain sensors to measure the natural frequencies and modal amplitudes of a cantilevered graphite/bismaleimide...
A New Era in Space Operations
The United States has embarked on a bold new course in space. We are in the process of deploying global missile defenses which promises to help realize an extended era of international...
NASA's Future Plans for Space Astronomy and Astrophysics
This paper presents NASA's plans for future space astronomy and astrophysics through the first decade of the next century. Discussed will be specific missions and mission concepts, as...
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...
Some Considerations for Instrumentation for a Lunar-Based Solar Observatory
Outstanding problems in solar physics, observational trends and directions of instrumental development in solar astronomy are discussed briefly. These lead to the specification of observational...
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...
Plot-scale Field Experiment of Surface Hydrologic Processes with EOS Implications
Plot-scale hydrologic field studies were initiated at NASA Marshall Space Flight Center to a) investigate the spatial and temporal variability of surface and subsurface hydrologic processes,...
The Wide-Angle Optoelectronic Stereo Scanner WAOSS for the Soviet Mars 94/96 Missions
The Wide-Angle Optoelectronic Stereo Scanner WAOSS is anticipated for the Soviet Mars 94/96 missions. Starting from the tasks of WAOSS as a part of the TV complex ARGUS, the paper describes...
Lunar Farside, Mars Polar Cap, and Mercury Polar Cap Neutrino Experiments
Neutrino detection offers unusual Civil Engineering challenges for the inner Solar System, including: outposts and permanent bases on the Moon, a novel development within the polar caps...
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...
Passive Dispersive Transport Modelling: Comparison with Experimental Rhodamine Data in the Elbe Estuary, Germany
Aiming at modelling of the complex water mass, suspended matter and pollutant transport in a tidal estuary, the ability of simulating the transport of passive, conservative tracers is...
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...
A Finite Element Model for Three-Dimensional Flows Along the West Coast of Vancouver Island
Extensive salinity and temperature measurements taken during June 1984 are used to calculate a three-dimensional density field for the west coast of Vancouver Island. Combining this field...
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