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The Effect of Multiple Compliant Layers at the Fiber-Matrix Interface on Residual Thermal Stresses in Metal Matrix Composites
The large mismatch in thermoelastic properties of the fiber and matrix phases in advanced metal matrix composites, coupled with high consolidation temperatures, produces severe residual...

Comparison of Micromechanical Models for Elastic Properties
The effective elastic properties for unidirectional composites, as predicted by several analytical micromechanical models are compared for glass/epoxy and graphite/epoxy. A brief review...

Space Habitat Contaminant Growth Models?Part II
This paper reports on the continuation of work being done at NASA's Center for Space Environmental Health (CSEH) at the University of Colorado at Boulder on contaminant growth modelling...

Regolith Dynamics
Due to the differences of the gravitational accelerations of the Earth and Lunar environments, geotechnical engineering must be applied differently in the two environments. This study...

An Integrated Human/Plant Metabolic Mass Balance Model
The design and development of Controlled Ecological Life Support Systems (CELSS) in support of future Lunar and Martian bases requires analytical models for evaluating human and biological...

Launching Facility Constraints on the Space Exploration Initiative
The Space Exploration Initiative (SEI) proposes large space programs such as a human mission to Mars and the establishment of a lunar base. These programs will require massive logistical...

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,...

Improvements on Quantifying Pass-By Trips for Shopping Centers
Improvements to the procedures for quantifying pass-by trips (T), handling imbalanced traffic volume conditions, and collecting field pass-by trip data are suggested. A simpler model which...

Site Impact Analysis Using the Tranplan Computer Model
As the cost of infrastructure improvements continue to spiral upward local and state governments are finding it more difficult to provide for increases in traffic volumes due to growth...

Using Computer Models in Site Impact Assessment
Use of comprehensive large area traffic models (citywide or regional) in site traffic impact assessment can greatly aid certain elements of the analysis, but may be inappropriate for other...

Computerized Transportation Planning Models for Site Impact Analysis: Precision or Complexity?
Computer based travel forecasting models are now being widely used in the analysis of the traffic impacts of proposed developments. They are commonly used to identify improvements needed...

Traffic Impact Study Ingredients
The elements, information sources, and format appropriate for traffic impact studies are described. The types of traffic impact studies discussed include regional modeling studies, municipal-wide...

Development Impact Assessment with Transportation Models
The use of microcomputers in urban transportation modeling is having a major impact on the traffic engineering and planning profession. Between the late 1950's and early 1980's, most modelling...

Techniques for Visualization of Estuarine and Coastal Flow Fields
A variety of formats for the display of velocity vector components are presented and assessed. The effective transmittal of information to the viewer is the criterion emphasized. The special...

Developments of Modelling Software for Civil Engineers
The paper describes some of the recent problems in the development of software tools for civil engineers, especially software for hydrodynamic and water quality simulations for environmental...

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...

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...

Nowcast Protocol for the Great Lakes Forecasting System
The Great Lakes Forecasting System is a cooperative federal-university undertaking designed to implement a predictive system for each of the Great Lakes. The desired forecasts concentrate...

Model Development for Operational Use to Help Spill Combating and Sea Rescue
Based on twenty years' experience on flow velocity measurements, transport experiments and numerical modeling the three-dimensional (3D) models of water currents, transport and water quality...

A Coastal-Ocean Hindcast/Forecast Model
Flows in the coastal oceans are produced by interactions of different components: tides, winds, buoyancy discharge from estuaries, topography and remote forcing of deeper-ocean origin....

 

 

 

 

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