Fracture Response of Cement Matrices Reinforced with High Volume Fiber Fraction
Toughening mechanisms of cement matrices reinforced with high volume fiber fraction have been experimentally studied by quantitative image analysis and laser holographic interferometry....

3-D Positioning for Construction Surveying and Automation
Three-dimensional real-time positioning is a critical requirement to allow for improved surveying and autonomous vehicle control. Given such a system and a project data link, multiple...

Formation of Droplets from Bursting Bubbles at an Air-Water Interface
The breakup of an air bubble at a still water surface leads to the formation of two distinct droplet families known respectively as film drops and jet drops. The former are the tiny fragments...

High Performance Fiber Reinforced Cement-Based Composites
Fracture of cement-based composites reinforced by the relative high fiber volume is studied. Crack propagation and damage distribution were examined by laser holographic interferometry....

Displacement Measurement by Laser Interferometry and Image Analysis
Laser holographic interferometry was used for the evaluation of displacement fields on concrete and fiber reinforced concrete specimens. Transmission holography was used to analyze mortar...

Laser Ignition of Oil Spills: A History

Automated Position and Control Systems Using Lasers and Electromagnetic Signals
Positioning is a crucial area in the successful integration of CAD data into the construction process. This paper looks at several areas of positioning using lasers and electromagnetic...

The Strategic Exploration Initiative - Lunar Basing
The Strategic Exploration Initiative (SEI), as conceived by the author in 1987, applies the weaponry of the Strategic Defense Initiative (SDI) to non-military goals. These include directed...

Improving Drainage with Laser Controlled Land Grading in the Red River Valley of the North
This paper evaluates a laser controlled land grading project in the Red River Valley of the North. Graded fields are compared with ungraded fields to measure changes in dryland crop yields...

Laser-2-Focus Flow Measurements in the Runner of a Bulb Turbine and Comparison with Calculation
Flow measurements are presented, which were carried out near and inside the 4-blade runner of an axial model bulb turbine of double adjustable type. These measurements were performed by...

Prototype Laser Fluorescence/Fiber Optics Groundwater Contaminant Detector
Laboratory testing of a prototype field-portable instrument for in-situ laser fluorescence analysis of groundwater contaminants using fiber optics is discussed. Gasoline, gasoline components,...

A New Laser Range/Azimuth Position Fixing System
The ATLAS POLARFIX is an entirely new dynamic position-fixing system for short-range, large scale surveys. It is a range/azimuth laser-based system using only a single shore-based tracking...

An Experimental Investigation of a Confined Turbulent Jet

Temperature Effects on Lasers
While lasers have markedly improved the accuracy of engineering, air temperature gradients can reduce that drastically. Based on a sewer project that used lasers to align all the pipe,...

Operational Oil Spill Detection and Mapping

A Survey of Methods to Measure Vorticity in Turbulent Flows

Concurrent Forward and Backscatter LDA Measurement

Measurements of Interactions of Fluid Turbulence and Sediment Grains

Airborne Laser Acquisition of Cross-Section Data

 

 

 

 

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