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WE PURPOSE TO DEMONSTRATE THE FEASIBILITY OF SPEECH RECOGNITION ON A VLSI NEUROCOMPUTER. THE SPEECH RECOGNITION SYSTEM PERFORMS SPEAKER-INDEPENDENT RECOGNITION OF SPOKEN ENGLISH LETTERS. THE CURRENT IMPLEMENTATION OF THE SYSTEM, NOW RUNNING ON A SUN 4 WORKSTATION, CLASSIFIES LETTERS OF THE ENGLISH ALPHABET AT 94% ACCURACY - THE BEST REPORTED PERFORMANCE OF ANY SYSTEM ON THIS DIFFICULT TASK. THE HI ...

MAMMALIAN CELLS GROWN IN CULTURE EXCRETE AMMONIUM ION THAT ACCUMULATES IN QUANTITIES THAT MAY LIMIT CELL GROWTH AND REDUCE PRODUCT SYNTHESIS. THE USUAL TACTIC FOR LIMITING THE ACCUMULATION OF AMMONIA IS TO REPLACE THE "SPENT" MEDIUMWITH FRESH MEDIUM. SINCE MEDIUM REPLACEMENT INCREASES THE USE OF EXPENSIVE MEDIUM COMPONENTS, AMMONIUM ACCUMULATION LOWERS CELL AND PRODUCT YIELD ON MEDIUM AND INCREASE ...

POLYMERIC MEMBRANES HAVE THE POTENTIAL TO PERFORM ENERGY-EFFICIENT SEPARATIONS IN APPLICATIONS IN A GAS- AND VAPOR-SEPARATIONS MARKET THAT TOTALS AT LEAST $750 MILLION. HOWEVER, THE CURRENT SALES OF MEMBRANE SYSTEMS FOR THESE APPLICATIONS IS ONLY A FEW TENS OF MILLIONS OF DOLLARS--PRIMARILY BECAUSE CURRENTLY AVAILABLE MEMBRANES CANNOT WITHSTAND EXPOSURE TO THE HYDROCARBONS AND SOLVENTS OFTEN PRESE ...

LARGE CREW NUMBERS, LONG-DURATION MISSIONS, AND SEVERE LAUNCH AND RESUPPLY PENALTIES MAKE THE DEVELOPMENT OF REGENERATIVE ENVIRONMENTAL CONTROL AND LIFE SUPPORT SYSTEMS (ECLSS) A NECESSITY FOR BASES ON THE MOON OR MARS, AS WELL AS FOR DEEP-SPACE FLIGHTS. THE PURPOSE OF THIS PROPOSED PROGRAM IS TO DEVELOP AN INNOVATIVE, CONTINUOUS ECLSS SYSTEMFOR CARBON DIOXIDE REMOVAL. THE FOCUS OF THE PHASE I PRO ...

BROAD-SPECTRUM CHEMICAL INSECTICIDES ARE USED EXTENSIVELY TO CONTROL CROP PESTS IN AGRICULTURE. THROUGH EFFECTIVE, THESE INSECTICIDES CAN BE HAZARDOUS TO THE ENVIRONMENT AND COUNTERPRODUCTIVE. MICROBIAL INSECTICIDES (MICROORGANISMS OR THEIR BYPRODUCTS) SHOW PROMISE AS SAFE, SPECIES-SPECIFIC, NARROW-SPECTRUM INSECTICIDES; HOWEVER, FEW MICROBIAL INSECTICIDE PRODUCTS HAVE BEEN COMMERCIALIZED. SPECIFI ...

NASA IS DEVELOPING WATER-ELECTROLYSIS CELLS TO RECHARGE THE EXTRAVEHICULAR MOBILITY UNIT (EMU) OXYGEN BOTTLES IN FLIGHT. THESE CELLS PRODUCE HIGH-PRESSURE (UP TO 6000-PSI) OXYGEN AND HYDROGEN STREAMS SATURATED WITH WATER VAPOR. THESE GAS STREAMS MUST BE DEHYDRATED TO VERY LOW WATER-CONTENT LEVELS--TYPICALLY AT LEAST TO -70 DEGREES FAHRENHEIT DEW-POINT TEMPERATURE--TO PREVENT VALVES FROM FREEZING O ...

THIS WORK IS DIRECTED TOWARD THE INVESTIGATION OF A NEW MEMBRANE-BASED PROCESS FOR THE SEPARATION OF ENANTIOMERS IN A RACEMIC MIXTURE. MANY BIOLOGICALLY ACTIVE SUBSTANCES ARE CHIRAL, AND IN GENERAL ONLY ONE OF THE ENANTIOMERS IN THE RACEMIC MIXTURE PRODUCES THE DESIRED BIOLOGICAL ACTIVITY. FREQUENTLY, THE UNWANTED ENANTIOMER INHIBITS THE DESIRED BIOLOGICAL ACTIVITY OF THE ACTIVE ENANTIOMER AND/OR ...

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