Award Data

SOIL WASHING OR FLUSHING HAS BEEN SHOWN TO BE AN EFFECTIVE METHOD FOR REMOVING HEAVY METALS FROM METAL-CONTAMINATED SOILS AT SUPERFUND SITES. SANDY SOILS CAN OFTEN BE WASHED WITH WATER TO MOBILIZE METAL IONS IN AN AQUEOUS PHASE, BUT FOR CLAY SOILS OR SOILS WHICH CONTAIN INSOLUBLE METAL COMPOUNDS, E.G., LEAD SULFATE, OTHER ADDITIVES SUCH AS CHELATING AGENTS (EDTA) ARE USED TO EFFECT TRANSFER OF MET ...

MRC PROPOSES TO DEVELOP A SAFETY PERFORMANCE INDICATOR (PI) OF THE ELECTROMAGNETIC (EM) PROTECTION STATUS OF A NUCLEAR POWER PLANT (NPP). WE BELIEVE THAT SUCH A PI IS NEEDED BECAUSE: (1) EM ENVIRONMENTAL POLLUTION IS ON THE INCREASE,(2) ADDITIONAL EM THREATS MUST BE EVALUATED, AND (3) DISRUPTION OF NPP OPERATIONS BY EM EFFECTS CAN AND MUST BE AVOIDED. PREVIOUS STUDIES HAVE ADDRESSED THE ISSUE OF E ...

A RESEARCH PROGRAM IS PROPOSED TO DETERMINE THE FEASIBILITY OF USING ADVANCED VACUUM INSULATIONS TO IMPROVE THE PRODUCTIVITY OF REFRIGERATED SHIPPING CONTAINERS WHILE AVOIDING THE ENVIRONMENTAL RISKS ASSOCIATED WITH CHLOROFLUOROCARBONS (CFC'S) IN FOAM INSULATION CURRENTLY BEING USED. ADVANCED VACUUM INSULATIONS, CURRENTLY UNDER RESEARCH AND DEVELOPMENT, DO NOT CONTAIN CFC'S AND HAVE VERYHIGH THERM ...

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 ...

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THE OBJECTIVES OF THIS RESEARCH ARE THREE-FOLD: (1) TO DEV ELOP TECHNIQUES FOR RAPID START-UP OF ANAEROBIC DIGESTERS; (2) TO DEVELOP PROCEDURES FOR RAPID RECOVERY OF UPSET DIGESTERS WHICH HAVE BEEN SHOCKED BY OVERLOADING, TOXIC SUBSTANCES, OR PH DEPRESSION PROBLEMS; AND (3) TO INCREASE THE OVERALL KINETICS OF ANAEROBIC DIGESTION. REACTION KINETICS MAY BE IMPROVED BY ENHANCING THE GROWTH OF METH AN ...

IN 1982, A SPECIAL COMMITTEE OF THE NMAB ISSUED A REPORT ON THE NONDESTRUCTIVE METHODS THAT MIGHT BE USED TO MEASURE THELOGITUDINAL FORCE IN INSTALLED RAILS. IT SHOWED THAT THE ACOUSTO-ELASTIC EFFECT WHICH INFERS THE STRESS FROM MEASURE MENTS OF SMALL SHIFTS IN THE VELOCITY OF SOUND WAS PROMISINGBUT DIFFICULT TO IMPLEMENT BECAUSE VARIATIONS IN THE METALLURGICAL STRUCTURE OF THE METAL AND UNCERTAIN ...