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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...

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...

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,...

F-K Spectra From a Haskell-Type Source in a Multiple-Layered Half-Space
Analytic expressions for the complex Fourier amplitudes of seismic ground motion at the free surface of a layered half-space are established. The seismic source is described using Haskell's...

A Knowledge Based System with Uncertainty for the Soil
In this paper, we present the methodology that we used to develop the KBSOL Knowledge Based System for the soil. We describe the structure that contains the objects of the domain (layer,...

Polynomial Chaos for Nonlinear Random Vibration
A new technique is presented for the solution of nonlinear random vibration problems. The technique is based on a spectral expansion of the random excitation and of the random response...

A Statistical Method for the Reliability of Mechanical Components
The usual statistical treatment of data for the reliability of components is to fit a distribution to them and then to use this theoretical distribution for predictions. But since this...

?H and ?⁴C as Tracers of Ground-Water Recharge
Surface spreading of water from the Santa Clara River is used to recharge aquifers underlying the Oxnard Plain. These aquifers are divided into an upper system about 400 feet thick, and...

Evapotranspiration Data Management in California
This paper will discuss components of the California Irrigation Management Information System (CIMIS). CIMIS is an automated agricultural weather network operated by the California Department...

Engineering Answers to Groundwater Impact Questions Using a Geographic Information System (GIS)
Environmental concerns have raised complex questions about the impacts of increased groundwater levels adjacent to navigational pools along the Red River, Louisiana. Previous studies had...

Applications of Remote Sensing to Drainage
This paper summarizes examples of current applications of remote sensing information to drainage. Topics covered include drainage basin parameters, drainage problem identification, salinity...

Water Data of the International Boundary and Water Commission
The International Boundary and Water Commission, United States and Mexico (IBWC) was created by the Treaty of March 1, 1889, between the Governments of the United States and Mexico. Principal...

Beyond Push-Button GPS
In 1993, the U.S. Air Force Space Command will complete its deployment of 24 satellites for the Global Positioning System, affording 3-dimensional positions and velocities 24 hours a day...

Development of the San Fernando Basin Groundwater Flow Model
This paper describes the development and calibration of the San Fernando Basin (SFB) groundwater flow model. The SFB is the largest groundwater basin in the Upper Los Angeles River Area...

Dry Creek Watershed Flood Control Plan: A Case Study
This paper describes the development of the Dry Creek Watershed Flood Control Plan. This study was conducted to quantify the extent of the existing and future (buildout) drainage problems...

Indicator Variography for Spatial Characterization of Aquifer Heterogeneities
The qualitative information or soft data from lithologic descriptions is processed using a state-of-the-art geostatistical approach to delineate, with quantified uncertainty, the extent...

 

 

 

 

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