Roller Compacted Concrete III
This proceedings,
Development of Detached Breakwater Design Criteria Using a Shoreline Response Model
An evaluation of beach response to detached breakwaters was conducted using the numerical shoreline response model GENESIS. Functional design parameters such as structure length, gap distance,...
The Effect of Wave Grouping on the Characteristic Wave Height
Wave data from two field stations and from the laboratory tests have been analyzed. The groupiness factor is used to categorize the wave data for the discussion of the correlation between...
On Distributed Processing Applications in Finite Element Analysis
Computer architectures may be classified by the relationship between their instruction and data streams (SISD, SIMD, MISD, MIMD) and the locality of memory (shared, local). Distributed...
The Transverse Vortex in the Wall Regions of the Turbulent Boundary Layers in the Flows with Adverse Pressure Gradient
The vortical structures in the turbulent boundary layers in the flow with adverse pressure gradient were investigated by the hydrogen bubble technique. The vortices were visualized in...
An Evaluation Study of Modified Mohr-Coulomb and Cap Models
Two failure criteria, namely Mohr-Coulomb and cap models, are considered in this paper with some modifications. Mohr-Coulomb theory is applied to concrete after stress and strain cut-offs...
Vacuum Melting and Mechanical Testing of Simulated Lunar Glasses
Lunar silicate glasses may possess superior mechanical properties compared to terrestrial glasses because the anhydrous lunar environment should prevent hydrolytic weakening of the strong...
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...
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,...
Geographical Information System (GIS) Technology in Global Environmental Evaluation?An Overview
The Land Analysis Team at the Construction Engineering Laboratory is enhancing the GRASS software package to deal with global environmental questions. CERL has implemented the basic software,...
Space Exposed Experiment Developed for Students
Space Exposed Experiment Developed for Students (SEEDS), a cooperative endeavor of NASA Headquarters, the NASA Langley Research Center, and the George W. Park Seed Company, resulted in...
Soft Touch People Mover Central Control
The people mover central control systems perform many automatic functions, are built with off-the-shelf redundant hardware, include advanced color graphics and touch screen operator interfaces,...
Traffic Data Collection: What Really Needs to be Done?
The collection of 'existing' traffic data such as the 24-hour counts, turning movement counts, driveway volumes, and vehicle classification counts near the proposed project site becomes...
NetCDF: A Public-Domain-Software Solution to Data-Access Problems for Numerical Modelers
Unidata's network Common Data Form, netCDF, provides users with an efficient set of software for scientific-data-storage, retrieval, and manipulation. The netCDF file format is machine-independent,...
Methodology for Validation of a Tampa Bay Circulation Model
The National Ocean Service is presently conducting the Tampa Bay Oceanography Project, including development and application of a three-dimensional circulation model to the Bay, and collection...
Modeling Three-Dimensional Circulation and Sediment Transport in Lakes and Estuaries
The transport of fine sediments due to currents and wind waves in estuaries and lakes have been studied by means of field experiments, laboratory experiments, and a comprehensive three-dimensional...
Thirty Year Simulation of Chesapeake Bay Eutrophication
Eutrophication processes in Chesapeake Bay, 1959-1988, are simulated using a three-dimensional model package. Results link the volume of anoxic water to degree of stratification and to...
Experiments with a Terrain-Following Hydrodynamic Model for Cobscook Bay in the Gulf of Maine
A terrain-following (sigma-coordinate) hydrodynamic model with 10 vertical levels and horizontal resolution of 225 m on a 70?60 grid has been applied to Cobscook Bay, located in the eastern...
A PC-Based Integrated Water Quality Impact and Analysis System
An integrated water quality model system (WQ Shell) has been developed for the PC. The system is designed to provide an easy-to-use graphical interface which integrates geographical and...
A Numerical Model Simulation of Tidal Currents in Long Island and Block Island Sounds
A case study evaluating the predictive capability of a hydrodynamic model of Long Island Sound is presented. The model is a time dependent, three-dimensional, primitive equation, estuarine...
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