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Broadband beamforming and direction finding using concentric ring array
(University of Missouri--Columbia, 2005)
Sensor arrays have been used widely in applications including radar, sonar, seismology, biomedicine, communications and imaging. A very popular type of sensor array is circular array, which has almost invariant array pattern in azimuthal plane...
Fully automated deep supervised and unsupervised learning approaches for 3D protein cryo-EM density map reconstruction
(University of Missouri--Columbia, 2019)
One of the most important components of the human body is the protein. Protein uses for building and repairing tissues, making enzymes and hormones. It is the essential building block of bones, muscles, cartilages, skin ...
Design and analysis of a frequency reconfigurable antenna for wireless communication at 5 GHz
(University of Missouri--Columbia, 2016)
substrate dimensions (L, W, H) are 30 x 27 mm and 1.67 mm respectively, while the patch was made from copper. The substrate was made from the industry standard FR- 4 material, with a relative permittivity of 4.3. The operational frequency bands...
Decadal mass balance of the Antarctic ice sheet from satellite radar altimetry and its contribution to global sea level change
(University of Missouri--Columbia, 2006)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] In this research, we estimated the decadal mass balance of the Antarctic ice sheet using the European Space Agency's ERS-1 and ERS-2 satellite radar ...
Synthesis and characterization of TiO2 nanotube Schottky diodes
(University of Missouri--Columbia, 2021)
, nonstoichiometric TiO2 diodes displayed an improved ideality factor from 3.7 to 2.4. A 350 [degrees] C post-fabrication thermal treatment, however, led to both stoichiometric and nonstoichiometric TiO2 diodes having similar ideality factors of 2.0 and similar shifts...
Chronomorphic characterization and radiolytic degradation analysis of polyurethane with monte carlo modeling of the neutron spectra surrounding age pettrace cyclotron
(University of Missouri--Columbia, 2018)
This thesis describes the development of fast neutron irradiation positions at the MURR GE PETtrace cyclotron for polyurethane (PUR) radiolysis studies. Monte Carlo N-Particle (MCNP) Transport code was used to calculate ...
Magnetoresistance in semiconductor-metal hybrids for power applications
(University of Missouri--Columbia, 2008)
. The conventional 4-terminal (4-point) vdP probe configuration for sensors is compared to 2-terminal (2-point) probe positioning which is necessary for power devices. The effects of material properties on resistance and magnetoresistance (MR) for an externally...
Localization in challenging environment using geometric and machine learning techniques
(University of Missouri--Columbia, 2019)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] The establishment of robust sensor network applications requires accurate and non complex positioning techniques using a full or partial set of ...
Adaptive array signal processing using the concentric ring array and the spherical array
(University of Missouri--Columbia, 2009)
This thesis introduces new methods for partial adaptive beamforming using concentric ring and spherical arrays for acoustic signals on a partially known interference environment. We propose novel methods to choose intra-ring ...
A fast, 3 MV Marx generator for megavolt oil switch testing and integrated Abramyan network design
(University of Missouri--Columbia, 2005)
The University of Missouri-Columbia has a new test facility online to study oil breakdown of enhanced and uniform gaps. The 3 megavolt Marx generator is operational with switch configurations tested including large electrode ...
Land cover classification from satellite imagery, and its applications in cellular network planning
(University of Missouri--Columbia, 2005)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] To further increase the classification accuracies, radar image processing techniques were investigated to preprocess the Radarsat data before classification. ...
Metasurface based uncooled Sixgeyo1-x-y microbolometer for infrared detection
(University of Missouri--Columbia, 2022)
on the geometry of the metasurface material. The inclusion of the metasurface permits engineering the IR absorptance with respect to wavelength. Absorption by the metasurface eliminates the need for a 1/4-wave resonant cavity under the microbolometer. In addition...
Design and fabrication of one and two axis nickel electroplated micromirror array
(University of Missouri--Columbia, 2007)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] MEMS based micromirror devices are gaining importance at a steady pace in the applications related to optical communications and display technology. ...
Compact power conditioning and RF systems for a high power RF source
(University of Missouri--Columbia, 2008)
As part of the University Consortium for High Power Microwave (HPM) Integration, compact power conditioning and RF systems were investigated with a maximum diameter of 15.24 cm. A simulator of a flux compression generator ...
Synthesis of ordered nanoenergetic composites
(University of Missouri--Columbia, 2005)
Energetic materials can be defined as the substances or mixtures that react chemically to release energy required for their intended application. Thermite is a subgroup of pyrotechnic, a class of energetic material. ...
Impedance and plasmonic based MEMS sensors for chemical and biological applications
(University of Missouri--Columbia, 2020)
that increased the strength of the measured signal by a factor between 4 and 6.25, high sensitivity of 3 cell/ml and detection time of less than 1 hour. The second project is implementing a fiber optic based chemical sensor, which consists of a thin film metal...
Simulation and experimental study of the multichanneling rimfire gas switch
(University of Missouri--Columbia, 2005)
Since 1985, the Rimfire switch has been used extensively in accelerators at Sandia National Laboratories. Demands for increased future accelerator performance require improvements to the Rimfire switch. This thesis is both ...
Automatic extraction of man-made objects from high-resolution satellite imagery by information fusion
(University of Missouri--Columbia, 2005)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] Recently available high-resolution commercial satellite imagery provides an important new data source for remote sensing applications. Automated feature ...
Optimum receiver design and performance analysis for wireless communication
(University of Missouri--Columbia, 2005)
This dissertation is devoted to the optimum receiver design and theoretical performance analysis of wireless communication systems operated over fading channels, and this objective is incarnated by means of design, analysis ...
Charge collection mechanisms in a sub-micron grated MSM photodector: field analysis
(University of Missouri--Columbia, 2005)
Enhanced charge collection mechanisms due to sub-micron wall-like silicon structures on the active surface of a metal-semiconductor-metal (MSM) photodetector were studied through the analysis of transmitted electromagnetic ...