Search
Now showing items 1-10 of 840
Evaluation of Traffic Responsive Control on the Reston Parkway Arterial Network
(Virginia Center for Transportation Innovation and Research, 2009-02-01), VTRC 09-CR6
Traffic responsive plan selection (TRPS) control is considered an effective operational mode in traffic signal systems. Its efficiency stems from the fact that it can capture variations in traffic patterns and switch timing ...
Access Control Design on Highway Interchanges
(Virginia Center for Transportation Innovation and Research, 2008-01-01), VTRC 08-CR7
The adequate spacing and design of access to crossroads in the vicinity of freeway ramps are critical to the safety and traffic operations of both the freeway and the crossroad. The research presented in this report develops ...
Self-Compensating Fiber Optic Flow Sensor System And Its Field Applications
(Optical Society of America, 2004-07-01)
A self-compensating fiber optic flow sensor system based on the principle of broadband white-light interferometers and cantilever beam bending is described. The fiber optic sensor system uses two fiber ferrule sensors that ...
Composite Pavement Systems: Synthesis of Design and Construction Practices
(Virginia Center for Transportation Innovation and Research, 2008-11-01), FHWA/VTRC 09-CR2
Composite pavement systems have shown the potential for becoming a cost-effective pavement alternative for highways with high and heavy traffic volumes, especially in Europe. This study investigated the design and performance ...
Optical Scanning Cryptography For Secure Wireless Transmission
(Optical Society of America, 2003-09-01)
We propose a method for secure wireless transmission of encrypted information. By use of an encryption key, an image or document is optically encrypted by optical heterodyne scanning and hence encryption is performed on ...
Determination of the In-Place Hot-Mix Asphalt Layer Modulus for Rehabilitation Projects Using a Mechanistic-Empirical Procedure
(Virginia Center for Transportation Innovation and Research, 2006-07-01), FHWA/VTRC 07-CR1
This project evaluated the procedures proposed by the Mechanistic-Empirical Pavement Design Guide (MEPDG) to characterize existing hot-mix asphalt (HMA) layers for rehabilitation purposes. Thirty-three cores were extracted ...
Asphalt Materials Characterization in Support of Implementation of the Proposed Mechanistic-Empirical Pavement Design Guide
(Virginia Center for Transportation Innovation and Research, 2007-01-01), VTRC 07-CR10
The proposed Mechanistic-Empirical Pavement Design Guide (MEPDG) procedure is an improved methodology for pavement design and evaluation of paving materials. Since this new procedure depends heavily on the characterization ...
Enhanced Absorption And Electro-Optic Pockels Effect Of Electrostatically Self-Assembled Cdse Quantum Dots
(Optical Society of America, 2005-10-01)
The spectrum and electro-optic properties of CdSe quantum dots are studied. Spectrum wavelength shifts that are due to the quantum size effect and to the electro-optic Stark effect are investigated. It is found that CdSe ...
Observation Of The Enhanced Backscattering Of Light By The End Of A Tilted Dielectric Cylinder Owing To The Caustic Merging Transition
(Optical Society of America, 2003-03-01)
The scattering of light by obliquely illuminated circular dielectric cylinders was previously demonstrated to be enhanced by a merger of Airy caustics at a critical tilt angle. [Appl. Opt. 37, 1534 (1998)]. A related ...
Origin of magnetic and magnetoelastic tweedlike precursor modulations in ferroic materials
(American Physical Society, 2004-05-14)
Based on experimental observations of modulated magnetic patterns in a Co(0.5)Ni(0.205)Ga(0.295) alloy, we propose a model to describe a ( purely) magnetic tweed and a magnetoelastic tweed. The former arises above the Curie ...