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Coupled Dynamics Of Vehicle-Bridge Interaction System Using High Efficiency Method, Lu Sun, Xingzhuang Zhao Aug 2021

Coupled Dynamics Of Vehicle-Bridge Interaction System Using High Efficiency Method, Lu Sun, Xingzhuang Zhao

Articles

Vehicle-bridge interaction is the core for a variety of applications, including vehicle vibration, bridge vibration, bridge structural health monitoring, weight-in-motion, bridge condition inspection, and load rating. These applications give rise to a great interest in pursuing a high-efficiency method that can tackle intensive computation in the context of vehicle-bridge interaction. This paper studies the accuracy and efficiency of discretizing the beam in space as lumped masses using the flexibility method and as finite elements using the stiffness method. Computational complexity analysis is carried out along with a numerical case study to compare the accuracy and efficiency of both methods against …


Effects Of Wetland Design And Invasive Species Removal On Carbon And Microbial Communities In Restored Wetlands, Benjamin Hamilton Aug 2021

Effects Of Wetland Design And Invasive Species Removal On Carbon And Microbial Communities In Restored Wetlands, Benjamin Hamilton

Theses

Multiple wetland ecosystem services such as carbon sequestration and nutrient removal are influenced by microbial communities and dissolved organic matter (DOM). I examined DOM composition, carbon metabolism, and microbial communities in three created wetlands, which had distinct hydrology, vegetation and antecedent land-use. To study differences between wetlands, porewater and soil were collected from each wetland in spring, summer, and fall of 2018. DOM was analyzed using NMR spectroscopy and fluorescence spectrometry, soil microbial community composition was examined using 16S ribosomal sequencing, and CO2 and CH4 production rates were measured in anaerobic soil incubations. Structural DOM composition varied significantly between the …


Waveform Systematics In Parameter Inference Of Gw Signals From Compact Binary Mergers, Anjali Balasaheb Yelikar Aug 2021

Waveform Systematics In Parameter Inference Of Gw Signals From Compact Binary Mergers, Anjali Balasaheb Yelikar

Theses

The Nobel prize winning discovery of gravitational waves from a binary black hole merger GW150914 opened up a new window onto the Universe. We have now seen multiple GW detections from coalescences of different kinds of compact binary objects. Accurate inference of parameters of these compact objects is a crucial part of gravitational wave astronomy. Data analysis techniques employ Bayesian statistics comparing gravitational wave models against the detected signal. Most of these models approximate solutions of Einstein's General Relativity equations, as generating numerical relativity(NR) solutions for every point in the parameter space of probable compact binary coalescences is computationally expensive. …


Material Use And Its Sustainability In The Automotive Industry, Ayomipo Arowosola Aug 2021

Material Use And Its Sustainability In The Automotive Industry, Ayomipo Arowosola

Theses

Among sectors in the United States, the transportation sector contributes the most to greenhouse gas emissions (USEPA, 2018) at 28%. A complex mix of market dynamics, demographics, and technological changes like material type (e.g. lightweighting techniques), fuel type (e.g. biogas), vehicle mode (e.g. internal combustion) and recyclability (Lewis et al., 2019) is employed to combat theses emissions. While these changes presumably effect linear level contributions and impacts, it is important to objectively determine their effects and impacts at a systems level. This research studied the material use implication of two major technological changes – lightweighting and electrification. The study involved …


Titanium Interconnection In Metallized Carbon Nanotube Conductors, Dylan J. Mcintyre Aug 2021

Titanium Interconnection In Metallized Carbon Nanotube Conductors, Dylan J. Mcintyre

Theses

Metallized carbon nanotube (CNT) networks aim to achieve conductivities competitive with bulk metals, while retaining the favorable temperature coefficient of resistance (TCR) for CNT materials. Cu is the predominant metal for high conductivity applications due to cost and availability. However, microscopy shows that Cu poorly wets a CNT surface and requires an adhesion metal for an improved physical and electrical interface. The present dissertation utilizes thermal evaporation as a direct method to evaluate 2-D coatings of Ti as an interfacial metal for bulk Cu-CNT hybrids. Specifically, a 10 nm Ti layer maintained a continuous and uniform coating after annealing to …


The Influence Of Herbivory On Macrophyte Community Structure And Nitrogen Retention In Created Wetlands, Evan Squier Aug 2021

The Influence Of Herbivory On Macrophyte Community Structure And Nitrogen Retention In Created Wetlands, Evan Squier

Theses

Wetlands are frequently created to mitigate the loss of natural wetlands due to commercial expansion. However, wetland ecosystem function is determined by complex abiotic and biotic interactions that are not well understood in natural wetlands, and even less so in created wetlands. This lack of understanding may lead to shortcomings in meeting desired restoration outcomes. Key abiotic drivers in wetlands include hydrology and nutrient availability, while herbivory provides both direct and indirect controls on plant communities and biogeochemical cycling. I hypothesized that by decreasing emergent plant biomass and shifting plant community structure to favor submerged plants, large grazers such as …


Comparative Dna Degradation Automation For Identifinders, Jennifer Pfaff Aug 2021

Comparative Dna Degradation Automation For Identifinders, Jennifer Pfaff

Theses

The degradation of DNA in forensic genetic genealogy can hinder timely results in victim or perpetrator identification. Identification of an unidentified victim, a “Doe”, involves analyzing the degraded DNA against reference genomes. Organizations like the DNA Doe Project and Identifinders currently manually compares the genomes in a spreadsheet with data input slowing down the investigative process. I propose a program to automate the data input and comparison to increase the speed at which Identifinders can continue their research into identifying victims. Comparative DNA Degradation Automation (CDDA) automates the process of creating a simulated degraded DNA profile in less than a …


Coplanar Electrowetting-Induced Droplet Ejection For 3d Digital Microfluidic Devices, Marcette Sapphira Greyson Aug 2021

Coplanar Electrowetting-Induced Droplet Ejection For 3d Digital Microfluidic Devices, Marcette Sapphira Greyson

Theses

Digital microfluidics is a promising fluid processing technology used in lab-on-achip applications to perform chemical synthesis, particle filtration, immunoassays, and other biological protocols. Traditional digital microfluidic (DMF) devices consist of a 2D grid of coated electrodes over which droplets are manipulated. Selective activation of the electrodes results in an electrowetting effect that deforms the droplets and can move them around the electrode grid. More recently, electrowetting on dielectric has also been used to eject droplets and transfer them between opposing surfaces. This has given rise to new 3D DMF devices capable of more sophisticated routing patterns that can minimize crosscontamination …


Urban Farming Design In Los Angeles: An Adaptive Reuse Project In Response To Food Crisis And Housing Crisis, Pin-Han Su Aug 2021

Urban Farming Design In Los Angeles: An Adaptive Reuse Project In Response To Food Crisis And Housing Crisis, Pin-Han Su

Theses

As the world population is constantly growing and will reach 9 billion people by 2050, the current danger to the world's food supply system creates a severe challenge. By 2050, more populations will be living in the cities and creating higher demand on food supply, but the farmable lands on our planet could be much less because of climate change and urbanization. Agricultural leaders have argued that cities will need to produce food internally to respond to demand by increasing population and to avoid harmful pollution and unaffordable food prices. Architecture, as the most influential element affecting our daily life, …


Methane Emissions From Stormwater Ponds, Brianna Pollard Aug 2021

Methane Emissions From Stormwater Ponds, Brianna Pollard

Theses

Methane (CH4) is a powerful greenhouse gas that has a global warming potential 28 times larger than carbon dioxide (CO2) on a 100-year horizon. Methane emissions from inland freshwater sources are not as well understood as those from other sources; however, current estimates suggest that they account for a significant portion of global CH4 emissions. Emissions from inland waters are difficult to measure due to their high spatiotemporal variability, leading to high levels of uncertainty and a need for more CH4 flux data from these freshwater systems. Increased runoff associated with urbanization has led to construction of man-made inland waters …


Argument For A Critical Perspective In Residential Architecture, James S. Burns Aug 2021

Argument For A Critical Perspective In Residential Architecture, James S. Burns

Theses

This thesis analyzes the theories of Critical Regionalism, including specific building techniques that use timber frame construction, site planning, and energy analysis, and applies them to a property in southwestern New York state. The property is situated on a small body of water called Loon Lake. This is a rural setting, but is highly populated along the waterfront. The lake is about three miles in length and the site of approximately 120 homes and cottages. The lake is considered private; however, there are frequent visitors who are granted access by local property owners to the water via boat. The lake …


System Integration Of A Tour Guide Robot, Suhasa Prabhu Kandikere Aug 2021

System Integration Of A Tour Guide Robot, Suhasa Prabhu Kandikere

Theses

In today's world, people visit many attractive places. On such an occasion, It is of utmost importance to be accompanied by a tour guide, who is known to explain about the cultural and historical importance of places. Due to the advancements in technology, smartphones today have the capability to help a person navigate to any place in the world and can itself act as a tour guide by explaining a significance of a place. However, the person while looking into his phone might not watch his/her step and might collide with other moving person or objects. With a phone tour …


Measurements Of Radiation Pressure On Diffractive Films, Ying-Ju Lucy Chu Aug 2021

Measurements Of Radiation Pressure On Diffractive Films, Ying-Ju Lucy Chu

Theses

One of the few ways to reach distant stars is by radiation pressure, in which photon momentum is harnessed from free sunlight or extraordinarily powerful laser systems. Large but low mass light-driven sails reflect photons and transfer momentum to the sailcraft, providing large velocity from continuous acceleration. Over the past decade, demonstrative reflective light sail missions were enabled by cost-efficient small satellites and the emerging private space economy. The maneuver of these metal-coated polyimide films is mechanically cumbersome because the sail must be rapidly tilted towards and away from the sun line during navigation. Modern diffractive films such as high-efficiency …


Emerging From Covid: Online Work And Its Implications For The Worker Performance In Kosovo, Ujvara Fetoshi Aug 2021

Emerging From Covid: Online Work And Its Implications For The Worker Performance In Kosovo, Ujvara Fetoshi

Theses

The emergence of the COVID-19 pandemic changed the way we live and work. Employers in Kosovo shifted their operations to a new and unfamiliar form of work for them and their workers and found new ways for their organizations to survive and strive in unexplored virtual environments. This study investigates the existing practices of remote work, the changing dynamics in remote environments, the opportunities and challenges and the implications for worker performance. To do so, this study analyzes primary quantitative and qualitative data which were collected in the time period of March-December 2020. The quantitative data was collected from a …


Design Of Reversible Quantum Logic Structures In Cmos Technology, Bahar Canga Aug 2021

Design Of Reversible Quantum Logic Structures In Cmos Technology, Bahar Canga

Theses

Reversible logic gates have an equal number of inputs and outputs, which also makes it possible to reverse calculate and reconstruct the inputs from the outputs. Quantum logic elements are inherently reversible and requires very little energy to operate. Some of the most common uses of Quantum Computers are in the design of Convolutional Neural Networks (CNN), Deep Neural Networks (DNN) and for machine learning (ML) purposes. In this research, the reversible logic gates were designed with 45ηm CMOS technology modeled after reversible quantum logic gates. As a proof of concept, hardware that provided Sigmoid Neuron Functionality was carried out …


Fpga Architecture And Verification Of Built In Self-Test (Bist) For 32-Bit Adder/Subtracter Using De0-Nano Fpga And Analog Discovery 2 Hardware, Nedim Hamzic Aug 2021

Fpga Architecture And Verification Of Built In Self-Test (Bist) For 32-Bit Adder/Subtracter Using De0-Nano Fpga And Analog Discovery 2 Hardware, Nedim Hamzic

Theses

The integrated circuit (IC) is an integral part of everyday modern technology, and its application is very attractive to hardware and software design engineers because of its versatility, integration, power consumption, cost, and board area reduction. IC is available in various types such as Field Programming Gate Array (FPGA), Application Specific Integrated Circuit (ASIC), System on Chip (SoC) architecture, Digital Signal Processing (DSP), microcontrollers (μC), and many more. With technology demand focused on faster, low power consumption, efficient IC application, design engineers are facing tremendous challenges in developing and testing integrated circuits that guaranty functionality, high fault coverage, and reliability …


Examining The Tradeoffs Of Green Infrastructure For Stormwater Management: Ecosystem Services Vs. Environmental And Human Health Impacts, Ciara M. Heister Aug 2021

Examining The Tradeoffs Of Green Infrastructure For Stormwater Management: Ecosystem Services Vs. Environmental And Human Health Impacts, Ciara M. Heister

Theses

As green stormwater infrastructure (GI) practices become more widely implemented, it is important to develop a full understanding of both the positive and negative ways that GI practices may influence environmental and human health. Additionally, as climate change leads to shifts in precipitation patterns, it is necessary to understand how the resulting changes in stormwater runoff volume, soil moisture, and vegetation species composition will impact both biogeochemical cycling and the production of ecosystem services and disservices. The overall objective of this study was to compare green stormwater infrastructure practices by weighing the tradeoffs that exist between negative impacts such as …


Polarization Dynamics In Nonlinear Photonic Resonators, Saif A. Al Graiti Aug 2021

Polarization Dynamics In Nonlinear Photonic Resonators, Saif A. Al Graiti

Theses

The global market demand for higher-bandwidth communication is increasing exponentially. Although optical networks provide high transmission speed using light to transmit signals, a bottleneck-inducing conversion is often needed to perform the processing of optical signals in the electrical domain. Such processing imposes a major barrier that would limit the high transmission speed of fiber-optic communications. This bottleneck conversion may be mitigated by extending signal-processing capabilities directly into the optical domain itself. Thus, I have studied the dynamics of optical polarization in a nonlinear photonic resonator to understand a new optical physical behavior to enhance the capabilities of optical signal processing. …


Lightfastness Of Water-Based Inks Vs. Latex Water-Based Inks, David Lopez Lopez Aug 2021

Lightfastness Of Water-Based Inks Vs. Latex Water-Based Inks, David Lopez Lopez

Theses

This study focused on the lightfastness properties of non-latex water-based inkjet inks and latex inkjet inks for conventional process colors, i.e., cyan, magenta, yellow, and black. Lightfastness is defined as the property of ink that describes the degree of resistance to fading when exposed to light. Lightfastness varies among inks based on their formulation. The degradation of inks caused by light happens when the light is absorbed by the pigments and reacts with the pigments and molecules in the printed substrate. This research evaluated the lightfastness degree of water-based inkjet inks vs. latex inkjet inks. The experiment used printed samples …


Assessing The Degree Of Agreement Between Polarized And Unpolarized Densitometry In Offset Lithographic Applications, Devin J. Schneider Aug 2021

Assessing The Degree Of Agreement Between Polarized And Unpolarized Densitometry In Offset Lithographic Applications, Devin J. Schneider

Theses

Automated color measurement systems have become significant components of offset lithographic printing presses for better process control and reduced job waste. In Europe, printers have broadly adopted polarized densitometry, which is uncommon in US standard operating procedures. It is recognized that some European press manufacturers provide automated color measurement instrumentation limited to polarized density readings. Introducing polarized densitometry into an environment where unpolarized densitometry is utilized can be problematic. The increasing significance of this issue has motivated print professionals to look for a solution. The present study applies the Bland-Altman method together with other statistical analyses to determine if a …


Direct Writing Of Printed Electronics Through Molten Metal Jetting, Manoj Meda Aug 2021

Direct Writing Of Printed Electronics Through Molten Metal Jetting, Manoj Meda

Theses

This research proposes a novel approach to printed electronics manufacturing via molten metal droplet jetting (MMJ). Large scale experimental work is presented to establish suitable jetting parameters for fabrication of high quality conductive electronic traces. Following process optimization, resistivity values as low as 4.49 µΩ-cm for printed 4043 aluminum alloy traces have achieved. This essentially matches the electrical resistivity of the bulk alloy, and it represents a significant improvement over results obtained with printed nanoparticle ink electronics. Electrical resistivity of printed traces that undergo static and cyclical flexing is included in the analysis. The cross-sectional area of traces printed with …


Marginalizing Over The Waveform Systematics Of Compact Binary Coalescence Models Using Rift, Aasim Zahoor Jan Aug 2021

Marginalizing Over The Waveform Systematics Of Compact Binary Coalescence Models Using Rift, Aasim Zahoor Jan

Theses

As Einstein’s equations for binary compact object inspiral have only been approximately or intermittently solved by analytic or numerical methods, the models used to infer parameters of gravitational wave (GW) sources are subject to waveform modeling uncertainty. We illustrate these differences and then introduce a very efficient technique to marginalize over waveform uncertainties, relative to a prespecified sequence of waveform models. We also extend this technique to include dynamic weighting by calculating overlap of models with Numerical Relativity. Being based on RIFT, a very efficient parameter inference engine, our technique can directly account for any available models, including very accurate …


State Of Refactoring Adoption: Towards Better Understanding Developer Perception Of Refactoring, Eman Abdullah Alomar Aug 2021

State Of Refactoring Adoption: Towards Better Understanding Developer Perception Of Refactoring, Eman Abdullah Alomar

Theses

Context: Refactoring is the art of improving the structural design of a software system without altering its external behavior. Today, refactoring has become a well-established and disciplined software engineering practice that has attracted a significant amount of research presuming that refactoring is primarily motivated by the need to improve system structures. However, recent studies have shown that developers may incorporate refactoring strategies in other development-related activities that go beyond improving the design especially with the emerging challenges in contemporary software engineering. Unfortunately, these studies are limited to developer interviews and a reduced set of projects. Objective: We aim at exploring …


Investigating Expansion And Extinction In The Planetary Nebula Ngc 7027 With Hst, Paula M. Moraga Baez Aug 2021

Investigating Expansion And Extinction In The Planetary Nebula Ngc 7027 With Hst, Paula M. Moraga Baez

Theses

Planetary nebulae are a late stage of the evolution of intermediate-mass (~1-8 solar mass) stars. A planetary nebula is formed after an asymptotic giant branch star's ejected mass becomes ionized by the stellar core, which is on its way to becoming a white dwarf. The shaping of planetary nebulae is slowly unveiled through studies of young and evolving nebulae such as NGC 7027. I have conducted an extensive analysis of the first-ever suite of contemporaneous panchromatic Hubble Space Telescope Wide Field Camera 3 (HST/WFC3) images of NGC 7027, extending from near-UV to near-IR. Extinction correction is performed successfully on several …


Wage And Productivity Of Employees In Service Providing Industries In Albania: A Close Look At It And Business Sectors, Sindi Rryta Aug 2021

Wage And Productivity Of Employees In Service Providing Industries In Albania: A Close Look At It And Business Sectors, Sindi Rryta

Theses

Nowadays, outsourcing has created new employment possibilities especially in developing countries. Although Albania is considered as one of the most prominent outsourcing destinations in the Balkans, there is little evidence in terms of the varying levels of wage and productivity of workers within the outsourcing sectors. The aim of this thesis is to provide insights regarding the wage and productivity differentials in two specific service-providing industries in Albania, namely IT BPO and BPO. The analysis of primary data collected through a survey (N=62) in four Albanian companies and eight interviews with representatives of outsourcing companies in both mentioned sectors, shows …


Distance Education: Challenges And Opportunities In A Post-Pandemic World. Case Of Kosovo, Fiona Shahini Aug 2021

Distance Education: Challenges And Opportunities In A Post-Pandemic World. Case Of Kosovo, Fiona Shahini

Theses

The objective of this study is to explore the challenges and opportunities created by the abrupt shift from classroom to distance learning. This study will try to address the question of “What distance learning presents for the future of education in a post-pandemic world?” More specifically, it aims to uncover the opportunities distance education brings and the challenges that can be resolved or mitigated in the future. The study focuses on secondary and primary data to uncover and analyze the experience of professors and students of tertiary education with distance learning. Secondary research shows that distance learning provides flexibility, which …


Integration Of A Visible-Telecom Photon Pair Source With Silicon Photonics For Quantum Communication, Vijay Soorya Shunmuga Sundaram Aug 2021

Integration Of A Visible-Telecom Photon Pair Source With Silicon Photonics For Quantum Communication, Vijay Soorya Shunmuga Sundaram

Theses

Reliable transfer of quantum information between nodes of quantum processors and memories is crucial for the realization of many groundbreaking technologies. These include distributed sensing, distributed computation, entanglement swapping, quantum metrology, quantum key distribution etc... which would vastly expand the potential of today’s quantum computers and form the framework for a secure quantum internet. However, most quantum nodes are accessed using visible photons which are incompatible with the telecom-band optical fiber network. In this thesis, we propose a method to bridge this spectral mismatch between the quantum nodes and the communication channel using a highly non-degenerate (810nm+1550nm) photon pair source …


Literature-Assisted Validation Of A Novel Causal Inference Graph In A Sparsely Sampled Multi-Regimen Exercise Data, Aditya Gupta Jul 2021

Literature-Assisted Validation Of A Novel Causal Inference Graph In A Sparsely Sampled Multi-Regimen Exercise Data, Aditya Gupta

Theses

Background. Causal mechanisms supporting the cardio-metabolic benefits of exercise can be identified for individuals who cannot exercise. With the use of appropriate causal discovery algorithms, the causal pathways can be found for even sparsely sampled data which will help direct drug discovery and pharmaceutical industries to create the appropriate drug to maintain muscles. Objective. The purpose of this study was to infer novel causal source-target interactions active in sparsely sampled data and embed these in a broader causal network extracted from the literature to test their alignment with community-wide prior knowledge and their mechanistic validity in the context of regulatory …


An Exploratory Assessment Of Peer-Reviewed Life Science Literature Statement Readability Used In Text-Based Interpretive Analyses, Jeremy Jackson Jul 2021

An Exploratory Assessment Of Peer-Reviewed Life Science Literature Statement Readability Used In Text-Based Interpretive Analyses, Jeremy Jackson

Theses

This project looked to explore the process of one of the scientific community’s leading text mining software, Pathway Studio, which efficiently streamlines the tedious task of information sorting and gathering in a clinical setting. To do this Pathway Studio implements a sentiment scoring algorithm which decides, based on interpreting literature similarly to natural human understanding, what sections of literature are most relevant to a given search request and provides corresponding peer-reviewed work in the industry. The novel statistics derived of its performance are used to establish an average form of a statement which reflects that of a standard level of …


“She’S More Like A Guy”: The Legacy Of Gender Inequity Passed On To Undergraduate Engineering Students, Jeanne Christman, Randy Yerrick Jul 2021

“She’S More Like A Guy”: The Legacy Of Gender Inequity Passed On To Undergraduate Engineering Students, Jeanne Christman, Randy Yerrick

Presentations and other scholarship

Despite decades of effort to increase the number of female graduates in engineering, women remain vastly underrepresented in the discipline. As millions of dollars in recruitment and retention programs have failed to reverse the underrepresentation problem, we as engineering education researchers need to refocus our efforts. Too often research is framed in student deficits and does not include an examination of the culture in engineering. In light of inertia to change, we must better identify the root cause of sustained gender inequity. Many scholars argue it is time start re-examining the undergraduate engineering culture. This includes the pedagogical practices, long-standing …