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COMMERCIAL CATFISH PRODUCTION IS SIGNIFICANTLY IMPAIRED BY INFECTIOUS DISEASES, A MAJOR CAUSE OF ECONOMIC LOSSES TO THE CATFISH PRODUCER. ONE OF THE MOST DETRIMENTAL OF THESE INFECTIOUS DISEASES IS ENTERIC SEPTICEMIA OF CATFISH (ESC) CAUSED BY EDWARDSIELLA ICTALURI. IN 1987, APPROXIMATELY $4 MILLION WORTH OF FISH IN MISSISSIPPI ALONE DIED FROM ESC. PROMPT TREATMENT OF INFECTED FISH INCREASES THE C ...

THERE IS A NEED FOR A RAPID, NON-DESTRUCTIVE METHOD TO TEST FOR PROPER STEEL PLACEMENT IN PORTLAND CEMENT PAVEMENTS. ISTHE GOAL OF THIS PROPOSED PROGRAM TO DEMONSTRATE THE FEASIBILITY OF USING SHORT-PULSE, GROUND-PENETRATING RADAR AS A MEANS OF RAPID STEEL LOCATION IN CONCRETE PAVEMENT. A GENERAL BACKGROUND IN GROUND-PENETRATING RADAR THEORY IS PRESENTED. LABORATORY AND FIELD MEASUREMENTS USING A ...

THIS PROJECT WILL DEMONSTRATE THE PRACTICALITY OF AN INTERACTIVE, HIERARCHICAL, DISTRIBUTED PLANNING SYSTEM FOR LOGISTICS MANAGEMENT. WE WILL DESIGN A SYSTEM THAT WILL SUPPORT PARALLEL, ASYNCHRONOUS, INTERACTIVE LOGISTICS PLANNING AT MULTIPLE LEVELS OF THE MANAGEMENT HIERARCHY AND AT MULTIPLE SITES SO THAT MANY PEOPLE COOPERATIVELY BUILD AND ADMINISTER A LOGISTICS PLAN. FOR EXAMPLE, A HIGHER-LEVEL ...

SENSORINEURAL HEARING IMPAIRMENTS, IN GENERAL, AND RECRUITMENT OF LOUDNESS, IN PARTICULAR, HAVE NOT BEEN SUCCESSFULLY TREATED WITH CURRENTLY AVAILABLE HEARING AIDS. TO DATE, THESE AIDS MOSTLY AMPLIFY SOUNDS, OFTEN ON A FREQUENCY-DEPENDENT BASIS. ANALOG WIDEBAND AND MULTIBAND AIDS EMPLOYING AMPLITUDE COMPRESSION HAVE MET LIMITED SUCCESS. DIGITAL SIGNAL PROCESSING PROVIDES GREATER FLEXIBILITY AND LE ...

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ELA TECHNOLOGIES, INC., HAS PRODUCED TWO BIOLUMINESCENT PROTEINS DESIGNATED RECAEQUORIN AND RECLUCIFERASE. THESE PROTEINS PRODUCE LIGHT WITH HIGH EFFICIENCY AND ARE DETECTABLE ON FILM IN THE PICOGRAM RANGE. RECAEQUORIN PRODUCES A FLASH OF LIGHT UPON THE ADDITION OF CALCIUM, AND RECLUCIFERASE PRODUCES A SUSTAINED SIGNAL IN THE PRESENCE OFITS SUBSTRATE, COELENTERATE LUCIFERIN. THIS RESEARCH WILL EVA ...

THE U.S. MARINE CORP REQUIRES AN INDEPENDENT ENGINEERING ANALYSIS OF THE PERFORMANCE AND OPERATIONAL COST-BENEFITS OF FOUR BLADED MAIN ROTOR DEVELOPMENT FOR THE AH-1W ATTACK HELICOPTER. THE PROPOSED PHASE I EFFORT IS DESIGNED TO SATISFY THIS REQUIREMENT BY FIRST GATHERING APPROPRIATE ENGINEERING DATA ON BOTH THE BASELINE CONFIGURATION AND THE PROPOSED FOUR-BLADED MAIN ROTOR SYSTEM, DEVELOPING SUIT ...

THE U.S. MARINE CORPS HAS A CRITICAL NEED FOR A NEW, STATE-OF-THE-ART SYSTEM FOR ARMAMENT CARRIAGE ON ITS AH-1W ATTACK HELICOPTER. THIS PHASE I EFFORT WILL PERFORM A TRADE/CONCEPTUAL DESIGN STUDY TO SYSTEMATICALLY IDENTIFY THE BEST DESIGN SOLUTION. THE MERITS, COSTS, AND RISKS ASSOCIATED WITH AN INNOVATIVE DESIGN SOLUTION (CONFORMAL WEAPONS PODS) WILL BE COMPARED TO MORE CONSERVATIVE DESIGN SOLUTI ...

THIS RESEARCH WILL TEST THE FEASIBILITY OF USING INEXPENSIVE POLYMERIC MEMBRANES TO SERVE AS PASSIVE CONTAMINANT BARRIERS FOR LABORATORY ANIMALS. THEORETICAL CALCULATIONS SHOW THAT THE FLUX OF ANIMAL RESPIRATORY GASES THROUGH POLYMERIC MEMBRANES CAN BE MORE THAN SUFFICIENT TO SUPPORT LIFE FOR ANIMALS IN HERMETICALLY SEALED ENVIRONMENTS. THESE MEMBRANES COULD BE USED TO PROTECT ANIMALS FROM AIRBORN ...