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There is a growing trend towards the use of ¿Car-Less¿ technology, where a rail-car is not needed to transport road-haul trailers over rail: Trailers operate in the usual manner over highways, drive up to a rail yard and transform to ¿rail-mode¿ with relative ease. In rail mode, many ¿Car-Less¿ units use slightly modified 3-piece, 70-ton freight car trucks. These trucks are no ...

Mandates to use native wildflower and grass seed began in 1987 with the Surface Transportation and Uniform Relocation Assistance Act and have been reinforced by two Executive Orders. Current demand for native seed exceeds the supply therefore the need exists to develop additional native seed sources.

Aircraft wire damage can be caused by aging, maintenance, vibration, exposure to moisture, and many other factors. However, current wire maintenance and inspection methods are often insufficient to detect these frequent problems. Williams-Pyro, Inc. proposes to develop an aircraft wire maintenance system that detects wiring problems and analyzes the type of fault. This system, called Active Aut ...

COMMERCIAL AND GOVERNMENT SPACE TRANSPORTATION SYSTEMS DEPEND ON GROUND SUPPORT FOR NAVIGATION. THE GROUND SOLUTION CAN BE COSTLY AND MAY PROVIDE LESS ACCURACY THAN NEEDED. A GPS-BASED REAL-TIME AUTONOMOUS SPACECRAFT NAVIGATION SYSTEM IS PROPOSED. AN ALGORITHM WILL BE DEVELOPED WHICH COMBINES GPS-DERIVED POINT POSITION ESTIMATES WITH A PROPAGATED A PRIORI POSITION ESTIMATE. THE POINT POSITIONS ARE ...

A CONCRETE CONSOLIDATION SYSTEM WILL BE DEVELOPED WHICH TAKES ADVANTAGE OF THE RESONANCE PHENOMENON AND HARMONIC COMBINATION OF INTERNAL AND SURFACE VIBRATIONS FOR EFFICIENTACHIEVEMENT OF UNIFORM AND THOROUGH CONSOLIDATION OF CONCRETE PAVEMENTS. AN INTEGRATED ANALYTICAL-EXPERIMENTAL RESEARCH IS PLANNED TO ASSESS THE TECHNICAL FEASIBILITY AND COST COMPETITIVENESS OF THE PROPOSED APPROACH. ANALYTICA ...

A NEED EXISTS TO MONITOR VIBRATION IN HIGHWAY BRIDGES. IT IS DESIRABLE TO MONITOR MANY POINTS ON THE BRIDGE. THE CURRENT PROBLEM IS THAT SENSORS MUST BE WIRED TO A CENTRAL LOCATION. WIRE IS DIFFICULT TO INSTALL AND TO MOVE. THE SOLUTION IS TO COLLECT SENSOR DATA BY RADIO. A SYSTEM EXISTS THAT ELIMINATES WIRE. IT GATHERS SENSOR DATA TO A CENTRAL LOCATION BY RADIO. THE SYSTEM'S UNIQUE FEATURE IS THA ...

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DYNAMIC QUANTIFICATION OF THE THREE-DIMENSIONAL SURFACE GEOMETRY OF ANTHROPOMORPHIC TEST DEVICES CAN IMPROVE CURRENT INJURY ASSESSMENT CAPABILITIES. PRESENTLY, A CHEST BAND CONSISTING OF MANY STRAIN GAUGES MOUNTED IN A MEMBRANE ARRAY IS BEING USED TO MEASURE DEFORMATION OF THE TORSO. WHILE THIS TECHNIQUE PROVIDES REASONABLE DATA, IT INCREASES THE COSTOF DATA ACQUISITION AND THE TIME TO PERFORM THE ...