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Use of Laser Holography and Image Analysis for Crack Measurement and Determination of Strain Fields in Cement Based Materials
The authors have successfully used laser holographic interferometry to measure various parameters, such as crack size, crack spacing, crack opening displacement, surface displacements...

Visualization of the Microstructural Response of Lightly-Cemented Granular Soils Under Uniaxial Strain Conditions
The microstructural response of granular soil under uniaxial strain is being investigated through direct observation of micromotions. Two techniques are being refined to quantify individual...

Acoustic Emission Source Locations in Concrete
The location of acoustic emission (AE) sources can potentially provide information on the fracture process zone in brittle materials such as concrete. Typical AE experiments generate very...

Experimental Techniques to Study the Microstructure of Cement-Based Materials
Techniques to identify phases and changes in microstructure within cement paste, mortar, and concrete using a scanning electron microscope and image analysis system are described. Backscattered...

Cement and Concrete Characterization by Scanning Electron Microscopy
The scanning electron microscope (SEM) is a powerful tool for the microstructural and chemical characterization of cement and concrete. Imaging techniques such as secondary electron, backscattered...

Hazardous Materials Data: A Federal Perspective
This paper discusses the evolution and current status of the Hazardous Materials Incident Report System (HMIRS) maintained by the Research and Special Programs Administration (RSPA) of...

Issues in Developing Arizona's Hazmat Incident Reporting Program
The Arizona Division of Emergency Services (ADES), in cooperation with Arizona State University (ASU) - Center for Advanced Research in Transportation, and the Arizona Department of Transportation...

Do Simplistic Methods of Foundation Design Produce Reliable Foundations?
Many foundations today are designed using deterministic (single value) analysis techniques which do not reflect the natural variability of soil properties. If the standard deviation and...

Spatial Variation in Liquefaction Risk Assessment
Basic concepts and methods of random field theory, needed to characterize 'distributed disordered systems', are reviewed and applied to a soil liquefaction case...

Lessons Learned About the Building Code Process?The Good, the Bad, and the Ugly
Building codes and standards exist to provide for the health, safety and welfare of the citizenry. Concern must also be given to the need to safeguard the economy lest major changes in...

Lessons Learned by the News Media
The paper summarizes a few things learned from the news media's experience in Hurricane Hugo and which they will try to do differently the next time. These include: simulcasting...

Public Involvement in Coastal Planning?The Long Beach Experience
A land use plan is often the creation of a professional planning staff prepared in response to the direction of public officials. When the City of Long Beach, California, was required...

Regional Monitoring in Southern California
Increasing concern about larger-scale, longer-term, and cumulative environmental effects has outstripped the ability of traditional point-source monitoring programs to provide useful information....

How Has the Joint Review Process Evolved?
The Joint Review Panel (JRP) process in California was established for offshore oil and gas-related coastal development projects to avoid duplication of effort among various permitting...

Oceanographic Earth Observations by Space Shuttle Astronauts
Thirty years of manned space flights have produced over 100,000 photographs of the Earth. Many of these photographs describe various coastal processes and oceanographic phenomena at a...

Environmental Impact Assessment and the Conservation of Marine Biological Diversity
Legislation is pending to include assessment of biodiversity in the Environmental Impact Statement process and revise the National Environmental Policy Act to better address the conservation...

The Acqisition of Remotely Sensed Sargassum Information on Daya Bay
The nuclear power plant on Daya Bay is the largest nuclear power plant under construction in China. In order to obtain reliable data about the possibility of blocking of the water intake...

Development of Shallow Draft Harbor Design Criteria
One of many U.S. Army Corps of Engineer (USACE) missions is the construction and maintenance of shallow-draft coastal ports and harbors. Current practices for shallow-draft harbor design...

Ebb Delta and Shoreline Response to Inlet Stabilization, Examples from the Southeast Atlantic Coast
Analytical studies were performed on the geomorphic evolution of four stabilized natural inlets located along the ebb-tide dominated, barrier island, southeastern coast of the United States....

Alaska Coastal Management Program: Development of the Coastal Zone Boundary
The Coastal Zone Management Act of 1972 required participating states to identify areas subject to a state management program, or delineate a coastal zone boundary. Alaska's...

 

 

 

 

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