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Articles 1 - 30 of 84
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Aardvark: A Solo Guitar Album, Jeffrey W. Buchanan
Aardvark: A Solo Guitar Album, Jeffrey W. Buchanan
Composition/Recording Projects
In this production paper, I discuss the entire process of creating my debut solo guitar album, Aardvark. There are ten songs on the albums, eight of which are originals and two of which are arrangements of existing music for solo guitar. Each chapter focuses on a specific song and dissects all elements that went into its creation, including the composition process, the type of guitar used, theoretical analyses, and any technical roadblocks I had to overcome. Several of my influences for the music on this album include Ted Greene, Bill Evans, Francisco Tárrega, Dream Theater, and music from the video …
Recovering Lost Exposure From The Majorana Demonstrator And Testing Data Selection Assumptions, Thomas Lannen
Recovering Lost Exposure From The Majorana Demonstrator And Testing Data Selection Assumptions, Thomas Lannen
Theses and Dissertations
The Majorana Demonstrator recently concluded its search for neutrinoless double beta decay using an array of up to 40.4kg of germanium detectors, 27kg of which were enriched in 76Ge and housed inside a copper and lead compact shield located at the 4850 foot level in a clean room in the Davis Campus of the Sanford Underground Research Facility (SURF) in Lead, South Dakota. This search proceeded from June 26, 2015 until March 3, 2021 and 64.5 kg yr of enriched active exposure was acquired while achieving a world leading energy resolution of 0.12% FWHM at 2039 keV, one of …
Acoustic-Emission Monitoring Of Lap Joint Fatigue Cracks, Siddharth Kannan
Acoustic-Emission Monitoring Of Lap Joint Fatigue Cracks, Siddharth Kannan
Theses and Dissertations
Structural integrity is a pivotal consideration in the field of engineering applications, and understanding the behavior of materials and joints under various loading conditions is critical. This thesis presents a novel approach to detect and analyze fatigue induced cracks in various test specimens using Piezoelectric Wafer Active Sensors. This approach is widely used in Structural Health Monitoring applications involving acoustic emissions that can be captured using PWAS which in turn gives the surface response to applied stresses. The ultimate goal of the research is to identify the length of a fatigue crack originating from lap joints and to develop a …
Characterization Of Vibrational Response Of A Helical Coil Subject To Environmental Exposure And Structural Modifications, Nathan Hill
Electronic Theses and Dissertations
In an effort to fully characterize the response of a cylindrical helix, the heat and vibrational stresses are modeled using both simulations and experimental testing. The intent of this work is to identify the frequencies, shapes, and Q factors of the vibrational modes of the helix subject to different stimuli and evaluate changes due to environmental exposures and structural modifications. COMSOL Multiphysics is used to simulate the response of the helix under different boundary conditions. Experimental measurements of the response to impulsive and continuous wave stimuli are taken. The eigenfrequency data from the simulations and experiments are then compared for …
Methods For Drone Trajectory Analysis Of Bottlenose Dolphins (Tursiops Truncatus), Jillian D. Bliss
Methods For Drone Trajectory Analysis Of Bottlenose Dolphins (Tursiops Truncatus), Jillian D. Bliss
Theses and Dissertations
With the increase in the use of UAS (Unmanned Aerial Systems) for marine mammal research, there is a need for the development of methods of analysis to transform UAS high resolution video into quantitative data. This study sought to develop a preliminary method of analysis that would quantify and present a way to visualize the dynamics and relative spatial distribution and changes in distribution of bottlenose dolphins (Tursiops truncatus) in the waters of Turneffe Atoll, Belize. This approach employs a previously developed video tracking program ‘Keypoint Tracking’ that enables manual tracking of individual dolphins and the creation of …
Acoustic Release And Receiver System, Sebastien Danthinne, Carlos E. Otero, Joseph R. Lyons, Reagan M. Lawson, Lily G. De Torres
Acoustic Release And Receiver System, Sebastien Danthinne, Carlos E. Otero, Joseph R. Lyons, Reagan M. Lawson, Lily G. De Torres
Mechanical Engineering
To design and build an acoustic release and receiver system, our team performed extensive
background research, developed thoughtful concepts of potential designs, performed ideation,
and constructed multiple prototypes. After constructing both a conceptual and structural
prototype, our team began updating the structural prototype to meet requirements expected of the
verification prototype. After completing the verification prototype, our team entered the testing
stage of the project. The electronics housings were pressure tested to determine if any leaks
would occur, the Dyneema rope was tensile tested to verify the system could withstand affected
loads, and the time to re-spool the device was …
Activity Levels Of Bat Species At Interstate Highway Sites With And Without Wildlife Underpasses In The Washington Cascades, Jenna Chapman
Activity Levels Of Bat Species At Interstate Highway Sites With And Without Wildlife Underpasses In The Washington Cascades, Jenna Chapman
All Master's Theses
Roads force wildlife to navigate degraded and fragmented habitats across the globe, creating barriers to movement and increasing the risk of mortality. This includes bats, whose movements between foraging and roosting habitats may be impeded by roads. Wildlife crossing structures (WCS) are a common mitigation strategy to increase connectivity, but investigation into bat activity in and around these structures is limited. I investigated bat species presence and activity along Interstate-90 in the Cascade Range of Washington State. My goal was to test whether all bat species found in the nearby forest were also active along the highway, and whether bat …
Development And Characterization Of An Underwater Acoustics Laboratory Via In Situ Impedance Boundary Measurements, Cameron Taylor Vongsawad
Development And Characterization Of An Underwater Acoustics Laboratory Via In Situ Impedance Boundary Measurements, Cameron Taylor Vongsawad
Theses and Dissertations
Modeling underwater acoustic propagation comes with a variety of challenges due to the need for proper characterization of the environmental conditions. These conditions include ever changing and complex water properties as well as boundary conditions. The BYU underwater acoustics open-air tank test-bed and measurement chain were developed to study underwater acoustic propagation within a controlled environment. It was also developed to provide ways to test and validate ocean models without the high cost associated with obtaining open ocean measurements. However, tank measurements require additional characterization of boundary conditions associated with the walls of the tank which would not be present …
Verification Of Acoustic Dissipation In Two-Phase Dilute Dispersed Flow Models In Computational Fluid Dynamics, Brennan Reeder
Verification Of Acoustic Dissipation In Two-Phase Dilute Dispersed Flow Models In Computational Fluid Dynamics, Brennan Reeder
Theses and Dissertations
With existing numerical models for fluid particle systems in CHEM, the acoustic-particle interactions associated with two-phase dilute dispersed flow can be captured and the particle model can be validated using experimental and analytical data and verified using numerical techniques. The experimental and analytical data come from Zink and Delsasso and provides data for particles of diameters 5 to 15 microns for frequencies between 500Hz to 13600Hz. In the particle number density measurements by Zink and Delsasso there was a 10% estimated error range. Using the fourth order skew symmetric flux in CHEM and the built in Eulerian and Lagrangian particle …
Modular Interior Partitions In Commercial Housing: A Case Study, Adam David Meleo
Modular Interior Partitions In Commercial Housing: A Case Study, Adam David Meleo
Construction Management
The ability to modify an interior space with ease and reasonable cost is beneficial to designers, owners, and end-users. Modular interiors are not a new concept. Modular interior partitions can come in the form of Japanese Shoji screens, as well as folding walls that would be found in a convention center. While not new in concept, the market for products that allow partitioning an interior space with ease appears to be growing with the introduction of innovative products and solutions. This paper will focus on two student housing projects in San Luis Obispo, California, with regards to their design and …
Lexical Stress Realization In Mandarin Second Language Learners Of English: An Acoustic And Articulatory Study, Boram Kim
Dissertations, Theses, and Capstone Projects
This dissertation investigated the acoustic and articulatory correlates of lexical stress in Mandarin second language (L2) learners of English, as well as in first language (L1) speakers. The present study used a minimal pair respective to stress location (e.g., OBject versus obJECT) obtained from a publicly available Mandarin Accented English Electromagnetic articulography corpus dataset. In the acoustic domain, the use of acoustic parameters (duration, intensity, F0, and vowel quality) was measured in stressed and unstressed vowels. In the articulatory domain, the positional information from tongue tip (TT), tongue dorsum (TD), upper lip (UL), lower lip (LL), and jaw (JAW) were …
Acoustic And Semantic Processing Of Speech And Non-Speech Sounds In Children With Autism Spectrum Disorders, Breanne D. Yerkes
Acoustic And Semantic Processing Of Speech And Non-Speech Sounds In Children With Autism Spectrum Disorders, Breanne D. Yerkes
UNLV Theses, Dissertations, Professional Papers, and Capstones
The processing of semantically meaningful non-speech and speech sounds requires the use of acoustic and higher-order information, such as categorical knowledge and semantic context. Individuals with an autism spectrum disorder (ASD) have been theorized to show enhanced processing of acoustic features and impaired processing of contextual information. The current study investigated how children with and without ASD use acoustic and semantic information during an auditory change detection task and semantic context during a speech-in-noise task. Furthermore, relationships among IQ, the presence of ASD symptoms and the use of acoustic and semantic information across the two tasks were examined among typically …
3d Acoustic Pipe Locator Imaging Based On Finite Element Analysis, Yi Liu
3d Acoustic Pipe Locator Imaging Based On Finite Element Analysis, Yi Liu
Graduate College Dissertations and Theses
A more complex underground pipe system is growing with the expansion of cities. However, there is no comprehensive database of underground pipes. Thus, it is urgent to build database with materials, positions, diameters, and etc. To locate the pipes is the first step. There are many ways to find pipes such as metal detector, ground penetrating radar, and acoustic method. Metal detectors are becoming increasing ineffective with more and more nonmetal is using in pipes. Ground penetrating radar is a precise way to find pipes but it is only works well under low moisture environment. Additionally, ground penetrating radar is …
Linbo3 Waveguide Modulators: A Gateway To Realizing Holovideo Technology, Jeffrey Christopher Leach
Linbo3 Waveguide Modulators: A Gateway To Realizing Holovideo Technology, Jeffrey Christopher Leach
Theses and Dissertations
In this dissertation, I will present the various work I have accomplished in regards to the design, simulation, and fabrication of holovideo and holodeck display technology. This includes: 1) design and analysis of a wavelength division multiplexing LiNbO3 waveguide device, 2) loss characterization and reduction (by way of reverse proton exchange) 3) design of a curved, near-eye AR display, and 4) a basis for acoustic holodeck technology (meant to service a system built from our optical devices). All these accomplishments represent, in concert, a manifestation of LiNbO3's capacity to serve as the building material central to modern holovideo displays. It …
Perception And Production Of Nanning Mandarin Fourth Tone, Julie Flaming
Perception And Production Of Nanning Mandarin Fourth Tone, Julie Flaming
Theses and Dissertations
Local varieties of Mandarin Chinese have been underdocumented. This study focuses on Mandarin high falling fourth tone (T4), as pronounced in connected speech by four female speakers native to Nanning City and its surrounding areas, in Guangxi Zhuang Autonomous Region. Surface forms of T4 and the high level tone (T1) often exhibit minimal difference, most likely due to the strong Cantonese influence in the area. I compare the pronunciation of T4 in multiple environments to the predictions about Standard Mandarin T4 surface forms in those same positions. Nanning T4 is flatter overall than Standard Mandarin T4 in all positions, with …
Use Of Dimpling Techniques To Alter The Vibration And Acoustic Characteristics Of Beams And Plates, Mofareh Ghazwani
Use Of Dimpling Techniques To Alter The Vibration And Acoustic Characteristics Of Beams And Plates, Mofareh Ghazwani
Dissertations
Structures such as beams and plates can produce potentially high levels of unwanted vibrations and noises in the environment. A method for improving the vibroacoustic characteristics of structures based on creating dimples on its surfaces is presented in this study. The goal of this technique is to keep the mass of the subject structure the same while changing its vibration and sound radiation characteristics. A boundary value model (BVM), derived using Hamilton’s Variational Principle, is used for modeling dimpled beams subjected to various boundary conditions. Using this method, the non-dimensional equations of motion, boundary conditions, and continuity conditions for a …
Indoor Positioning Using Acoustic Pseudo-Noise Based Time Difference Of Arrival, Nicholas J. Luong
Indoor Positioning Using Acoustic Pseudo-Noise Based Time Difference Of Arrival, Nicholas J. Luong
Master's Theses
The Global Positioning System (GPS) provides good precision on a global scale, but is not suitable for indoor applications. Indoor positioning systems (IPS) aim to provide high precision position information in an indoor environment. IPS has huge market opportunity with a growing number of commercial and consumer applications especially as Internet of Things (IoT) develops. This paper studies an IPS approach using audible sound and pseudo-noise (PN) based time difference of arrival (TDoA). The system’s infrastructure consists of synchronized speakers. The object to be located, or receiver, extracts TDoA information and uses multilateration to calculate its position. The proposed IPS …
Heel Down And Toe-Off Time Measured With Ultrasonic Doppler System And Force Plate Sensor, Sabin Timsina
Heel Down And Toe-Off Time Measured With Ultrasonic Doppler System And Force Plate Sensor, Sabin Timsina
Honors Theses
Collie Box is a medical device that measures the gait parameters of the person walk- ing in front of it. This device uses the Ultrasonic Doppler system to extract the heel-contact and toe-off times of a person walking within the range of 2-10 meters. These times are used to determine the leg’s swing phase and double stance times. The ultrasonic transducer of 10mm diameter is driven at 40kHz. At the time of the heel-contact and toe-off, foot velocity is zero while the torso part of the human body is still in motion. The wide directivity of 10mm diameter ultrasonic transducer …
Predicting And Managing Risk To Bats At Commercial Wind Farms Using Acoustics, Trevor Peterson
Predicting And Managing Risk To Bats At Commercial Wind Farms Using Acoustics, Trevor Peterson
Electronic Theses and Dissertations
Bat populations in North America face novel threats from white-nose syndrome and widespread turbine-related mortality related to the rapidly expanding wind power industry in addition to long-standing pressures from habitat loss and degradation. Bats, unlike most small mammals, are long-lived and slow to reproduce, highlighting the importance of understanding and managing anthropogenic sources of mortality. My dissertation research used acoustic bat detectors to measure bat activity at commercial wind projects, predict patterns in risk, and design strategic measures to reduce fatality rates by curtailing turbine operation during periods when bats are most active. Bats collide with wind turbines only when …
Acoustic Sonolysis Of Antibiotics In Water, Natalie Pinon
Acoustic Sonolysis Of Antibiotics In Water, Natalie Pinon
UNLV Theses, Dissertations, Professional Papers, and Capstones
Antibiotic resistance is a prominent issue in the world today. It is said by the Centers for Disease Control and Prevention that it is one of the major public health challenges we face today. Predominantly, antibiotic resistance is growing because conventional wastewater treatment processes are not able to completely break down antibiotics. As bacteria are exposed to such antibiotics, which don’t kill them due to selective pressure, they become immune and develop resistance which is a huge health concern. To prevent this from occurring, antibiotics need to be removed from hospital wastewater. Sonication is a promising technology that can be …
Mathematical Characterization Of A Microfluidic Ultrasound Driven Transfection Device., Chris J. Holton
Mathematical Characterization Of A Microfluidic Ultrasound Driven Transfection Device., Chris J. Holton
Electronic Theses and Dissertations
The objective of this thesis is to develop a mathematical model characterizing the behavior of a microfluidic sonoporation device in order to understand how standing wave conditions influence molecular delivery to cells and determine whether the model predicts device performance. A prior model based on an ultrasonic separation cell that uses standing waves to separate particles is adapted for translation to the microfluidic device. This study generates data on acoustic pressure profiles across the cell as well as identifying optimal driving frequencies. This model is validated and the equations and methods for developing this model are translated to the microfluidic …
Dynamic Workplace Design, Eduardo Parra De Nova
Dynamic Workplace Design, Eduardo Parra De Nova
Bachelor of Architecture Theses - 5th Year
The design of workplaces is often complex because it balances two opposing forces: on the one hand, innovation and creativity often involve teamwork processes and collaboration, occurring in spaces which may then produce higher than normal noise levels. On the other hand, many work processes rely on individual work, which requires quiet spaces needed for concentration. Another complex issues that office design architects must address involves the ever changing nature of workplaces, either as part of short-term evolving daily activities or as part of the longer-term changes organizations have to bring to their managerial style in order to stay competitive …
The Impact Of Anthropogenic Noise On Fish Behavior, Communication, And Development, Julie Butler
The Impact Of Anthropogenic Noise On Fish Behavior, Communication, And Development, Julie Butler
LSU Doctoral Dissertations
Noise pollution is pervasive to nearly all aquatic and terrestrial ecosystems and was labeled a pollutant of global concern by the World Health Organization in 2011. In the past few decades, underwater ambient noise levels have risen almost 30 dB SPL re: 1 µPa in the frequency range that most fish produce and detect acoustic stimuli due to rises in shipping, oil exploration, and pile driving. Changes to the natural soundscape can impact almost all aspects of an animal’s life. My dissertation research takes an integrative, whole-animal approach to examining how increased background noise impacts fish behavior, physiology, development, and …
Data Multiplexing In Vector Acoustic Communication: System Design And Experiments, Erjian Zhang
Data Multiplexing In Vector Acoustic Communication: System Design And Experiments, Erjian Zhang
Dissertations
Acoustic particle velocity channels, which are vector components of the acoustic field, have been recently explored to achieve communication purposes underwater. Vector sensors and transducers that can utilize acoustic particle velocity channels have compact multichannel designs, which are perfect for compact size underwater platforms. In this dissertation, an underwater acoustic multiple-input multiple-output (MIMO) communication system featuring orthogonal frequency division multiplexing (OFDM) and frequency shift keying (FSK) modulation is discussed. By transmitting multiple independent data streams simultaneously over several channels within the same bandwidth, the proposed MIMO system increases the transmission rate. A variety of components of the system such as …
Differences Between The Acoustic Parameters Of Prosody In Speakers With Asd And Typically Developing Speakers Ages Three To Six, Heather Delaune
Differences Between The Acoustic Parameters Of Prosody In Speakers With Asd And Typically Developing Speakers Ages Three To Six, Heather Delaune
LSU Master's Theses
The present study was designed to compare the acoustic parameters of prosody of children between the ages of three and six with Autism Spectrum Disorder (ASD to age matched typically developing (TD) speakers. The acoustic parameters of prosody examined were fundamental frequency (f0), intensity, speech rate, and speech rhythm. Analyzing the acoustic features of atypical expressive prosody in speakers with ASD would provide more detailed and defined information regarding the nature of the prosodic abnormality in these individuals to guide clinicians in providing a more concentrated focus for intervention. Speech samples were obtained from ten English-speaking, monolingual children (5 ASD, …
An Analysis Of Resistance Spot Weld Quality Based On Acoustic And Electrical Signatures, Ivan Charles Butler
An Analysis Of Resistance Spot Weld Quality Based On Acoustic And Electrical Signatures, Ivan Charles Butler
Theses and Dissertations--Manufacturing Systems Engineering
The union of a set of materials by way of Resistance Spot Welding is designed so that once fused together, a substantial amount of intentional, external force must be applied to separate the contents. Therefore, Resistance Spot Welding is often the preferred fusion method in high-volume manufacturing processes. The result of Resistance Spot Welding however is the formation of a weld nugget which is not visible to the naked eye. Destructive and/or ultrasonic methods applied off-line must be used to determine the quality of each weld; both inefficient and expensive processes. The following research analyzes the data fed back during …
An Acoustic Monitoring Method For Assessing River Dolphin Presence And Changes In The Context Of Anthropogenic Development, Charles A. Muirhead
An Acoustic Monitoring Method For Assessing River Dolphin Presence And Changes In The Context Of Anthropogenic Development, Charles A. Muirhead
Graduate Masters Theses
Populations of river dolphins throughout Asia are in decline as a direct result of intensified anthropogenic activity along river systems. Water development projects, land use change, contamination, and intensified fishing practices are known factors contributing to the probable extinction of the Yangtze river dolphin (Lipotes vexillifer) and declining populations of the South Asian river dolphin (Platanista gangetica spp.), Irrawady dolphin (Orcaella brevirostris), and finless porpoise (Neophocaena a. asiaeorientalis). Although not yet as extensive, river system development in South America is following a similar path as that of Asia, with impacts on dolphin species likely to follow. Currently, the Amazon river …
Using Passive Acoustics To Infer Spawning Behavior And Phenology: A Case Study Of Haddock On Georges Bank, Elizabeth Mcdonald
Using Passive Acoustics To Infer Spawning Behavior And Phenology: A Case Study Of Haddock On Georges Bank, Elizabeth Mcdonald
Theses - ALL
Climate change has the potential to impact many aspects of an organism’s biology, including phenology, the timing of important biological events. The timing of reproduction and spawning events for commercially important fish species is a critically important area of research for fisheries management. Haddock (Melanogrammus aeglefinus) are commercially important as well as sound-producing, which allows for monitoring via non-invasive passive acoustics. This study presents an application of passive acoustic monitoring to a multi-year dataset to increase understanding of haddock sound production, as well as trends in spawning phenology and behavior. An automatic acoustic detector was able to identify haddock calls …
Mobile Opera Backdrop, Juan Villalobos, Robbie Behlman, Kevin Valencia
Mobile Opera Backdrop, Juan Villalobos, Robbie Behlman, Kevin Valencia
Mechanical Engineering
Opera San Luis Obispo requires an acoustically projecting stage backdrop for their future plan of deploying a mobile opera house. The custom stage backdrop must be low-cost, easy to assemble and must project the performance sound to outdoor audiences. Other design requirements include being transportable in a step van, the ability to be assembled quickly by a crew of two, resistance to various outdoor conditions, the ability to mount accessories from the walls, and should meet a budget of $5,000. With the scope of the project understood, the three-quarter project is outlined. During the first quarter, the main deliverables included …
The Association Between Articulator Movement And Formant Histories In Diphthongs Across Speaking Contexts, Janae Valyn Christensen
The Association Between Articulator Movement And Formant Histories In Diphthongs Across Speaking Contexts, Janae Valyn Christensen
Theses and Dissertations
This study examined the effect of context on the association between formant trajectories and tongue and lip kinematics in the American English diphthongs /aɪ/ and /aʊ/. Seventeen native speakers of American English had electromagnetic sensors placed on their tongue and lips to record kinematic signals that were time-aligned with the corresponding acoustic recording. Speakers produced the diphthongs in isolation, in a single word rVl context, in a phrase hVd context, and in a sentence context. Kinematic data and the F1 and F2 trajectories were extracted from the middle 50% of each diphthong production. To allow direct comparison of signals with …