Sensor arrays play an instrumental role in a variety of applications, including radar, sonar, radio astronomy, and wireless communications. Employing an array of sensors permits direction-of-arrival (DOA) estimation, interference suppression, and imaging of spatial distributions of sources or scatterers. Linear and planar array geometries can have sensors with uniform or non-uniform spacings. Non-uniform arrays require much fewer sensors to achieve comparable performance to uniform arrays in terms of the spatial resolution and the number of resolvable sources or scatterers. This dissertation proposes novel signal processing methods for narrowband passive (receive-only) sensing and imaging. The focus is on source estimation using linear and planar passive arrays with uniform and non-uniform geometries. Algorithm development for the non-uniform arrays is facilitated by a virtual array structure, called the difference coarray, which comprises pairwise differences of physical sensor positions. The difference coarray naturally arises from the passive sensing signal model. High-resolution DOA estimation techniques, such as the subspace-based methods, are computationally expensive, especially for arrays that span large apertures. Further, performance of such methods deteriorates for coherent sources. We propose efficient and effective Fourier-based iterative techniques for DOA estimation of coherent and uncorrelated sources using linear and planar arrays with both uniform and non-uniform geometries. The considered non-uniform arrays include those with uniform and non-uniform difference coarrays. The proposed DOA estimation techniques build on the iterative interpolated beamformer, which employs an estimate-and-subtract strategy to successively extract the sources and refines the estimates via an interpolation and spectral leakage subtraction scheme. We enable iterative beamforming in the coarray domain for linear and rectangular arrays, specifically compensating for non-uniformity of difference coarrays to yield asymptotically unbiased DOA estimates. We also design the iterative interpolated beamformer for oversampled and undersampled uniform circular arrays under the manifold separation framework, which permits the application of DOA estimation techniques that were developed for uniform linear arrays to arbitrary array geometries, such as circular arrays. The proposed iterative beamforming techniques not only estimate the source DOAs, but also provide source power/amplitude estimates. As such, these Fourier-based methods are applicable to narrowband passive imaging systems for providing an accurate estimate of the distribution of source intensity or amplitude as a function of angle. / Electrical and Computer Engineering

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AN ABSTRACT OF THE THESIS OFZachary Alley, for the Master of Fine Arts degree in Technical Direction, presented on March 27, 2022, at Southern Illinois University Carbondale. TITLE: I HAVE A FEVER FOR MORE PEACOCKS: TECHNICAL DIRECTION FOR HAY FEVER MAJOR PROFESSOR: Thomas FagerholmThe Hay Fever production was produced on December 2, 2021 at Southern IllinoisUniversity Carbondale’s School of Theater and Dance. This thesis will pull the reader through the ideas, planning, and construction of the realized scenic design that composed the work of the technical director on this production. Focuses on how the technical director maintained open communication between the production team throughout the process. The technical director strived to bring clear interpretations of the scenic elements into their drafting to be used by the build crews to make the set a reality within the time and budget. Hopefully by presenting this thesis to the reader they can have a more extensive understanding that the work of technical direction is even more involved than just the material world of set construction.

There are a lot of stand-alone and mobile platforms using transmitters today. Some want to be found while others do not. In our modern society there is a great demand of mobility and communication abilities. This means that several mobile platforms could potentially carry a sensor to record incoming signals to be used in Direction Finding. This thesis identifies the possibility to determine the direction to a transmitter with randomly placed sensors. By conducting a literature review well-known methods such as Time Difference Of Arrival (TDOA) and MUltiple SIgnal Classification (MUSIC) where chosen as methods in this analysis. The methods are applied on two antenna arrays, an Uniform Circular Array (UCA) and a Random Circular Array (RCA). The RCA is generated with randomly placed sensors. The performance in the Direction Of Arrival (DOA) is investigated in presence of time synchronization error and with different numbers of elements, radius and Signal to Noise Ratio (SNR). The ambiguity in the arrays is also investigated to insure a ambiguity-free DOA estimation. The results from this analysis identifies that the accuracy in the DOA estimation is dependent on the number of elements, SNR, the elements positions and the radius of the DF array. Furthermore, the accuracy of a UCA is greater than a RCA when the elements are randomly distributed within the area of a circle with radius R. Finally, it has shown that if time synchronization error occurs between the sensors, then the MUSIC method the accuracy will decrease greatly. / Det finns många individer och mobila platformar som använder sändare idag. Vissa vill bli hittade, andra inte. I vårat moderna samhälle är det en stor efterfrågan på rörlighet och kommunikationsmöjligheter. Detta innebär att många mobila plattformar skulle kunna spela in signaler för att användas i radiopejling. Denna uppsats identifierar möjligheten att bestämma riktningen till en sändare med slumpmässigt placerade sensorer. Genom litteraturstudien identifierades de välkända riktningsmetoder som Time Difference Of Arrivial (TDOA) och MUltiple SIgnal Classification (MUSIC) som vidare valdes som metoder i denna analys. Två antennstrukturer används i analyserna. Den ena är en Uniform Circular Array (UCA) och den andra är en Random Circular Array (RCA). RCA är genererad med slumpmässigt utplacerade sensorer. Prestandan i riktningsuppskattningen undersöks när det existerar ett tidssynkroniseringsfel, olika antal sensorer i antennstrukturerna, varierande radier och olika signaloch brusförhållanden.Ä ventvetydigheter undersöks i strukturerna för att säkerställa att en entydig riktningsbestämning kan utföras. Resultaten implicerar att noggrannheten i riktningsbestämningen är beroende avantalet element, SNR, elementens position och radien i antennmatrisen. Utöver detta visar resultaten att en UCA har högre noggrannhet än en RCA då elementen är slumpmässigt utplacerade inom en cirkelradie, R. Slutligen, om tidssynkroniseringsfel uppstår mellan sensorerna kommer detta resultera i minskad noggrannhet när MUSIC metoden tillämpas.

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The purpose of this study is to compare the staging of the Passion Play of Oberammergau, Germany, with the staging of The Great Passion Play on Mount Oberammergau, Eureka Springs, Arkansas. Source material includes literary writings of the century concerning Passion plays, interview with the directors of both productions, and eyewitness accounts of the 1970 producation in Germany and the 1970, 1971 producations in Eureka Springs, Arkansas, U.S.A. Photographs of actors and scenes from both productions are used throughout the thesis.

The problem of this study was to arrange, develop, and stage creatively a complete dance composition in four parts using the ocean as a thematic source. The five specific purposes relating the theme and the choreography were developed and expressed through the medium of modern dance. A written report including the historical and scientific background of the thematic source and the choreographic process was also submitted. A video-tape recording is also available of the completed dance composition.

Aircraft in the US are equipped with Emergency Locator Transmitters (ELTs). In emergency situations these beacons are activated, providing a radio signal that can be used to locate the aircraft. Recent developments in UAV technologies have enabled mini-UAVs (5-foot wingspan) to possess a high level of autonomy. Due to the small size of these aircraft they are human-packable and can be easily transported and deployed in the field. Using a custom-built Radio Direction Finder, we gathered readings from a known transmitter and used them to compare various Bayesian reasoning-based filtering algorithms. Using a custom-developed simulator, we were able to test and evaluate filtering and control methods. In most non-trivial conditions we found that the Sequential Importance Resampling (SIR) Particle Filter worked best. The filtering and control algorithms presented can be extended to other problems that involve UAV control and tracking with noisy non-linear sensor behavior.

The Past and Pending is a feature-length documentary by Samuel Eliot Torres, made as part of the requirements for earning a Master of Fine Arts in Film & Digital Media from the University of Central Florida. The film focuses on a family torn apart by a major decision to migrate to the U.S. from Puerto Rico. The protagonist, Torres, is now trying to receive closure from the events by asking the questions he could not ask as a child, but feels compelled to ask as an adult. Filming with only one person in the crew allowed for an intimacy and spontaneity that is prized by entrepreneurial digital cinema makers. Without the financial and scheduling constraints of enlisting a large crew, the film was allowed to thrive with a spontaneous and ongoing shooting schedule, controlled entirely by one person.

The study of stage combat is designed to fabricate the illusion of physical combat without causing harm to the performers. Most research in this field does not take into account the characterization of the actor during the training of a fight scene. An actor primarily learns the stunt choreography of the scene and often times the subtleties of the character is often forgotten. Scenes that involve physical contact are an essential aspect of the dramatic action. My aim is to eventually devise a process that will consistently create fight scenes that maintain the integrity of the fight director‘s work as well as the mastery of the actor‘s character composition. I am aware this is an ambitious project therefore will I approach this endeavor in two stages. This document will cover the first stage of this project: the investigation of the current process of several professionals who have varying experiences with fight choreography. I will propose and explore the significance of a series of questions a director, actor and fight choreographer should answer before embarking upon a fight sequence successfully. Questions such as: How important is the stunt physiologically and psychologically on the character? Does gender play a role in a fight sequence? Do size, age, and race play a role on character choice in a sequence? Why did the character choose that weapon? Where did that character learn to fight and why in that style?