Increased interest in the field of sensor technology stems from the availability of an inexpensive and robust sensor to detect and quantify the presence of a specific gas. Bulk p-CuO/n-ZnO heterocontact based gas sensors have been shown to exhibit the necessary sensitivity and selectivity characteristics, however, low interfacial CuO/ZnO contact...
Solar photovoltaic is considered one among many new alternatives to satisfy
our demand for energy. Solar Cells have undergone changes in the last 50 years or so
since its invention in 1954. Solar power is beginning to challenge conventional
energy sources in terms of mainstream acceptance. Solar power along with...
This paper studies the current counternarcotics methods and the electronics technology used by the United States and Colombian governments to combat narcoterrorism in the Andean region. The efficiency and efficacy of these methods with the use of electronics technology are analyzed to determine if they are
successful. The current counternarcotics...
Acoustic scanned holography is a method of lensless photography
which uses sound waves to construct the hologram and light waves to
reconstruct the image. The receiving transducer scans a plane area
containing the sound field generated or scattered from the objects. In
simultaneous source receiver scanning, both the source and...
This thesis presents a novel algorithmic A/D converter to be used in a biosensor. The converter is capable of a conversion rate of 1.5 bits/phase and hence the required conversion time is reduced. The proposed architecture is analyzed for non-ideal effects and compared with existing algorithmic A/D architectures. The converter...
Estimating the carrier frequency from a modulated waveform is one of the most important functions of a coherent signal receiver. Good performance and low bit error rates are obtained by coherent demodulation. Therefore, exact knowledge of the received signal carrier frequency is critical for communication systems. Also due to the...
The full capacity of the existing transmission lines is often underutilized
due to the system stability requirements. Controllable network devices represent
the effective means of improving the system stability, and their deployment allows
better use of the existing transmission facilities and can help to avoid construction of
new lines. This...
Today's power systems are undergoing dynamic changes in their operation.
The high cost of capital improvements that include new generation and transmission
projects has prompted power system planners to look for other alternatives in dealing
with increased loads and overall system growth. A dynamic braking resistor is a
device that...
A new decentralized nonlinear controller for Robot Manipulators is
presented in this thesis. Based on concepts of Lyapunov stability theory and
some control ideas proposed in [3]-[7], we obtain continuous nonlinear
decentralized control laws which guarantee position and velocity tracking to
within an arbitrarily small error.
Assumptions based on physical...
The brushless doubly fed machine (BDFM), or self-cascade
single-frame machine, can operate asynchronously or
synchronously over a wide speed range. In this sense the
machine becomes an adjustable speed synchronous machine.
Such machines may become unstable in certain regions of
operation. Analyzing its steady-state performance and
determining its stable operating...