Award Data

MEASUREMENT OF CRITICAL TRACE LEVEL ELEMENTS IN SEMICONDUCTING MATERIALS MAY BE POSSIBLE USING A SPECIAL ATOMIC ABSORPTION SPECTROPHOTOMETRY TECHNIQUE. DIRECT VAPORIZATION OF SOLID SAMPLES COMBINED WITH A HIGHLY EFFICIENT SYSTEM TO CORRECT FOR NON-ANALYTE ABSORPTION WILL BE INVESTIGATED ON CDTE MATERIALS.

CRYOGENIC COOLING OF ADVANCED SENSORS IS BEING INVESTIGATED, PARTICULARLY CRYOCOOLERS THAT USE MINIATURE HIGH-SPEED TURBOEXPANDERS.A MINATURE ELECTROMAGNETIC BEARING (EMB) DESIGN FOR CRYOGENIC TURBINES IS BEING UNDERTAKEN TO OVERCOME THE LIMITATIONS OF GAS BEARINGS. THE PROPOSED EMB, BECAUSE IT IS NON-CONTACTING, IS EXPECTED TO SHOW ULTRA-HIGH RELIABILITY OVER EXTENDED PERIODS OF CRYOCOOLER OPERAT ...

DOWEL BARS HAVE TRADITIONALLY BEEN USED AS AN IMPORTANT LOADTRANSFER MECHANISM ON OUR FEDERAL HIGHWAYS. A SIGNIFICANT PROBLEM OCCURRS WITH THE USE OF THESE BARS DUE TO RUST AND RESULTANT SPALLING AND CRACKING CONCRETE. COMPOSITE REINFORCING BARS (CRB) HAVE BECOME WIDELY USED FOR CRACK CONTROL IN MANY REINFORCED CONCRETE STRUCTURES EXPOSED TO AGGRESSIVE ENVIRONMENTS. A LIMITED AMOUNT OF DATA IS AVA ...

THE NEXT GENERATION OF INNOVATIVVE CONCEPTS FOR THERMAL DEVICES FOR POWER SYSTEMS AND THERMAL LOOPS IN SPACECRAFT INVOLVE TWO-PHASE FLOW. THESE DEVICES UTILIZES THE LIQUID-VAPOR PHASE CHANGE IN BOILING AND CONDENSING PROCESSES IN ORDER TO TAKE ADVANTAGE OF THE HIGHER HEAT TRANSPORT RATES, LOWER WEIGHT, AND NEAR-ISOTHERMAL OPERATION AND CONTROL OF TWO-PHASE SYSTEMS COMPARED WITH CONVENTIONAL APPROA ...

A COST EFFECTIVE METHODOLOGY TO MANAGE A LARGE NETWORK OF UNDERGROUND STORAGE TANKS, SUCH AS WHAT EXISTS AT A MAJOR AIR FORCE FACILITY, WILL BE INVESTIGATED. A VERSATILE, IN GROUND, LEAK DETECTION SYSTEM UTILIZING IN SITU SENSORS AND AN INSTALLATION METHOD OF PUSHING PREFABRICATED MONITORING POINTS INTO THE SOIL WILL BE DEVELOPED. THE METHODOLOGY DEVISED IS EXPECTED TO REPLACE COSTLY MONITOR WELL ...

A SIGNIFICANT GAIN IN PERFORMANCE AND REDUCTION IN WEIGHT IS AFFORDED BY INCREASING THE OPERATING TEMPERATURES OF TURBINE ENGINES. PRESENT LIQUID-LUBRICATED BEARINGS ARE A MAJOR OBSTACLE IN ACHIEVING THIS GOAL DUE TO TEMPERATURE LIMITATIONS OF THE OIL LUBRICANT. MAGNETIC BEARINGS OFFER AN ATTRACTIVE ALTERNATIVE IN THAT THEIR CONTACT-FREE OPERATION ELIMINATES THE NEED FOR BEARING LUBRICATION. CREAR ...

THE OVERALL CYCLE EFFICIENCY (HENCE, INPUT POWER REQUIREMENTS) OF REVERSE-BRAYTON CRYOCOOLERS FOR SPACE APPLICATIONS IS HIGHLY SENSITIVE TO THE THERMAL EFFECTIVENESS OF THE HEAT EXCHANGERS. APPLICATIONS FOR THESE CRYOCOOLERS IN SPACE DICTATE THAT THESE HEAT EXCHANGERS BE AS SMALL AND LIGHT AS POSSIBLE. TO DATE, ONLY HEAT EXCHANGERS EMPLOYING ORGANIC MATERIALS HAVE BEEN ABLE TO ACHIEVE THE HIGH THE ...

THIS PROJECT ADDRESSES THE NEED FOR EFFICIENT AND EFFECTIVE SUPPLY OF OXYGEN ON BOARD COMBAT AND TRANSPORT AIRCRAFT. THE PROPOSED EFFORT SPECIFICALLY INVOLVES THE DEVELOPMENT OF A MINIATURE HIGH SPEED TURBOEXPANDER FOR A HYBRID OXYGEN SYSTEM FOR ON-BOARD OXYGEN GENERATION AND STORAGE. THE TURBOEXPANDER IS A CRITICAL COMPONENT IN AN OPEN CYCLE REFRIGERATION STAGE WHICH USES ENGINE BLEED AIR TO LIQU ...

N/A

N/A