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Microscopic measurement of surface topography is a continuing need in microfabrication technology and materials research. The aim of this research is to adapt the scanning electron microscope (SEM) to the quantitative measurement of a wide range of surface structures. The SEM is a widely used measurement tool in materials science and semiconductor fabrication. The SEM's strength is that it prov ...

Smart IR technology has advanced at a rapid pace over the last two decades, pushed along by primarily defense-related requirements. This includes such breakthroughs as Acousto-Optic Tunable Filters and microbolometer detector arrays. Coupled with the continuing growth in microprocessor power, this promises to make a new generation of fast, cheap and reliable infrared (IR) fire detectors possible ...

A NEW APPROACH IS PROPOSED FOR OCEANOGRAPHIC REMOTE SENSING WITH DUAL USE APPLICATIONS IN MINE HUNTING, OCEAN BOTTOM MAPPING, AND SEA FLOOR REMOTE SENSING. THE WEAVER IS A SONAR SYSTEM INTENDED TO DETECT, LOCALIZE, AND CLASSIFY SEAFLOOR BOTTOM LAYING TARGETS, DISCRIMINATING MAN-MADE ITEMS FROM NATURAL ONES IN THE PRESENCE OF NATURAL CLUTTER; IT EXPLOITS HERETOFORE OVERLOOKED TARGET-PHYSICS BASED C ...

Digital imagery is an increasingly prevalent in the computerized workplace; however, the increasing volume of this data is stressing storage and communications systems. One of the most competitive solutions to these stresses is wavelet-based data compression. A wide variety of wavelet image compression methods exists, and given an application, there is a need to compare different methods before ...

During the last two decades, software to support the manufacturing lifecycle has become pervasive. Sophisticated off the shelf packages are available for most standard manufacturing activities such as MRP, inventory control and dynamic scheduling. Unfortunately, most of this software has been developed in isolation by independent vendors and does not interoperate well with other independently de ...

The feasiblity of developing a PC based, pulsed ultrasonic test system for the economical and reliable testing of aluminum cylinders for sustained load cracking is addressed. A system consisting of a host PC, ultrasonic pulser/receiver and data acquisition hardware, control and analysis software, and transducer fixture for accurate positioning is proposed. In addition to the system development, ...

Soaking and co-crystallization experiments for studying the binding of potential drugs with proteins of known structure are a significant research function of crystallographic labs in pharmaceutical companies. Such experiments have two overriding characteristics: (a) the experiments are repetitive, and therefore become routine, and (b) numerous experiments are performed to acquire the desired in ...

THIS PROPOSAL DESCRIBES A PROGRAM TO DEVELOP A NEW TYPE OF NO2 VAPOR SENSOR BASED ON A ROOM-TEMPERATURE TUNABLE DIODE LASER ABSORPTION TECHNIQUE. RECENT ADVANCES IN INEXPENSIVE, VISIBLE DIODE LASERS, AND ULTRA-SENSITIVE DETECTION CIRCUITRY NOW PERMIT REAL-TIME MONITORING OF TRACE GASEOUS SPECIES WITH SIMPLE OPTO-ELECTRONIC PACKAGES. THE SENSOR WILL BE BASED ON VISIBLE NO2 ABSORPTION NEAR 632 NM (1 ...

SEVERAL CONCEPTS FOR INTERGRATED OPTIC POLARIZATION BEAMSPLITTERS HAVE BEEN PROPOSED. HOWEVER, FOR ANY INTEGRATED OPTIC DESIGN, ACHIEVING 30 DB EXTINCTION REQUIRES A FINE TUNING MECHANISM FOR THE COUPLER. WE PROPOSE A NOVEL METHOD, USING PROTON EXCHANGE AND TITANIUM DIFFUSION IN LITHIUM NIOBATE, TO FINE TUNE A POLARIZATION SEPARATING COUPLER. THE TECHNIQUE ALLOWS MODIFYING THE TRANSFER LENGTH FOR ...