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DRY FINE COAL BENEFICIATION OFFERS A POTENTIALLY COST-EFFECTIVE MEANS OF REDUCING COAL'S ASH AND SULFUR CONTENT. DURING DRY PROCESSING, COAL PARTICLES COLLIDE, DEVELOP TRIBOELECTRIC CHARGES, AND EXPERIENCE STRONG ELECTROSTATIC EFFECTS. THESE ELECTROSTATIC EFFECTS CAN LEADTO SPARKING AND POTENTIAL PERSONNEL AND FIRE HAZARDS. THESEEFFECTS ALSO CAN BE USED IN A NUMBER OF ELECTROSTATIC BENEFICIATION P ...

THE OBJECTIVE OF THE PROPOSED PROJECT IS TO EVALUATE THE FEASIBILITY OF AN ON-LINE MONITOR OF OIL CONDITION WHICH WOULD DETECT THE PRESENCE AND NATURE OF DEBRIS PARTICLES IN LUBRICATING OIL SYSTEMS. THIS WOULD PROVIDE A MORE TIMELY AND LESS LABOR INTENSIVE METHOD OF OIL CONDITION MONITORING THAN PRESENT METHODS THAT INVOLVE OFF-LINE ANALYSIS. THE PROPOSED APPROACH WOULD CONSIST OF MEASURING THE FO ...

THE PURPOSE OF THIS STUDY IS THE DEVELOPMENT OF INSTRUMENTATION TO MEASURE DRY DEPOSITION RATES OF ATMOSPHERIC TRACE GASES. THE METHOD IS BASED ON THE CONCENTRATION GRADIENT TECHNIQUE AND WILL USE A TUNABLE DIODE LASER LIGHT SOURCE COMBINED WITH LONG LINE-OF-SIGHT ABSORPTION PATHS TO DETECT TRACE SPECIES AT PART-PER-BILLIONCONCENTRATIONS. THE INSTRUMENT WILL BE DESIGNED SPECIFICALLY FOR THE DIRECT ...

PRESENT INFRARED DECOYS FOR PROTECTION OF NAVY SHIPS ARE RELIABLE, HIGH INTENSITY COMBUSTION SOURCES. HOWEVER, THEIR EMISSION SPECTRA HAVE CHARACTERISTICS WHICH ALLOW THEM TO BE DISTINGUISHED FROM THE SHIPS THEY ARE INTENDED TO PROTECT. IT IS DESIRABLE TO DEVELOP MODIFIED FUELS WHOSE COMBUSTION WOULD PRODUCE INFRARED SIGNATURES WITH THE APPROPRIATE SPECTRAL PROPERTIES. THIS GOAL REQUIRES A DETAILE ...

USING CONCENTRATION MODULATED SPECTROSCOPY, THIS STUDY WILL EXTEND WORK IN LASER TECHNIQUES FOR POINT MEASUREMENTS IN COMPLEX COMBUSTION SYSTEMS TO HIGH SENSITIVITY MEASUREMENT OF CONCENTRATIONS OF A WIDE VARIETY OF MOLECULAR SPECIES. THIS TECHNIQUE, WHICH USES A SINGLE LASER TO BOTH PERTURB MOLECULAR LEVEL POPULATIONS AND DETECT THIS PERTURBATION, HAS SEVERAL FEATURES THAT MAKE IT ATTRACTIVE FOR ...

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ALPHATECH'S ITERATIVE MODELING METHODOLOGY (AIMM) DEVELOPS A SYSTEM REPRESENTATION BY USING A TEAM-BASED APPROACH TO DEVELOPING A SERIES OF CHART-BASED MODELS OF THE SYSTEM WITHIN THE CONTEXT OF AN APPROPRIATE SCENARIO; THIS SET OF CHART-BASED MODELS CULMINATES WITH A PETRI NET REPRESENTATION WHICH CAN BE DIRECTLY IMPLEMENTED IN ALPHATECH'S SIMULATION TOOL, MODELER. THE COMPUTER MODEL THAT RESULTS ...

THE OBJECTIVE OF THIS RESEARCH IS TO DETERMINE THE FEASIBILITY OF USING THE STOCHASTIC, TIMED, ATTRIBUTED PETRI NET (STAPN) METHODOLOGY TO DESCRIBE AND ANALYZE ALTERNATIVE NAVAL C3 ARCHITECTURES. THE US NAVY IS IN THE PROCESS OF DEVELOPING C3 ARCHITECTURES TO SUPPORT THE NAVY'S MISSION AND FUNDAMENTAL WARFARE TASKS. THIS PROCESS INVOLVES ASSESSING ALTERNATIVE C3 ARCHITECTURES TO DETERMINE THEIR IM ...