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Fiber optic intrusion sensor investigation
(1994)
A novel type of fiber optic intrusion sensor has been proposed and investigated theoretically and experimentally. The sensor is configured as a coherent optical time domain reflectometer (OTDR) with a highly coherent laser ...
Mixed-signal processor for a Fabry-Perot interferometric fiber optic pressure sensor
(1994)
This dissertation presents the design and implementation of a novel mixed-signal processing method for recovering the pressure information obtained from a fiber optic Fabry-Perot interferometric sensor. The sensor is ...
Fiber optic delay line development
(1994)
A program m able °Pheal-fiber delay gne using optical switches is investigated. The alpfiber optical switch is a MaC^'2 eh n d er interferometer w ith a piezoelectric transducer in each arm, which Pr°duces phase modulation ...
Fabrication of channeling masks for Ion Projection Lithogrphy
(1994)
For sub-0.5 $mu$m feature sizes in VLSI circuits, Ion Projection Lithography shows good promise. One of the key components for this type of lithography is the availability of a suitable mask. Present work involved the ...
Position sensor elimination techniques for synchronous reluctance motor
(1994)
Synchronous reluctance motor drives have recently received renewed attention. This interest is mainly due to modern field oriented control strategies, which have recently been applied to these motors. In particular it ...
Spatio-temporal neural networks in High Impedance Fault detection
(1994)
The tim ely detection and isolation of High Impedance Faults(HIFs) are im portan t to ensure the safety of the public and the property around power distribution lines. The existing protection measures are highly inadequate ...
Maximum likelihood sequence estimation via the expectation maximization algorithm in the presence of random phase and amplitude fading
(1994)
The expectation-maximization (EM) algorithm was first introduced in the statistics literature as an iterative procedure that under some conditions produces maximum likelihood (ML) parameter estimates. Here we investigate ...
Design issues in a new implementation approach to digital fault simulators for protective relay studies
(1994)
After almost a century of continuous growth, modern power systems are facing contradicting demands of increasing the existing network utilization while improving the overall service reliability. This puts special emphasis ...
Some new approaches to improve the power factor and reduce harmonics in three phase rectifier type utility interfaces
(1994)
In the recent years there has been a significant increase in the use of power converter equipment for variable speed ac/dc motor drives, emergency and standby power supplies for critical loads, magnet power supplies etc. ...
The circular cavity for antennas, periodic structures, and power combiners
(1994)
Circular cylindrical cavity resonators have been studied in three configurations. First, a slot antenna backed by a circular cylindrical cavity was analyzed. The resonant frequency of the cavity is found using power ...