Matching Items (12,821)
Filtering by
- Creators: Barrett, The Honors College
- Status: Published
Description
Titanium dioxide (TiO2) is a photocatalytic material which has made its way into the European market for use within building materials (e.g. in photocatalytic cement). The air-cleaning and self-cleaning properties of TiO2 make it an attractive material for development. TiO2 has been widely studied to determine the mechanism by which it catalyzes reactions, but research into its use in photocatalytic cement has focused only on the percent pollutant removed and not the composition of the resulting gas. The current research focuses on examining the oxidation of methanol over the solid materials and the development of a methodology to study the formation of intermediates in the removal of the pollutant molecule. The initial methanol oxidation studies over the photocatalytic cement resulted in a reduction in the concentration of methanol and an increase in potential products. However, these studies identified several system challenges that led to a focus on the system design. It is recommended that future reactor systems optimize the transfer of material through the use of agitation and minimize the path length between the reactor cell and the FTIR gas cell. Furthermore, creating an air-tight system is paramount to the success of future studies.
ContributorsBenov, Emil Plamenov (Author) / Andino, Jean (Thesis director) / Schoepf, Jared (Committee member) / Chemical Engineering Program (Contributor) / School of International Letters and Cultures (Contributor) / Barrett, The Honors College (Contributor)
Created2019-05
Description
Octopus arms employ a complex three dimensional array of musculature, called a
muscular hydrostat, which allows for nearly infinite degrees of freedom of movement without
the structure of a skeletal system. This study employed Magnetic Resonance Imaging with a
Gadoteridol-based contrast agent to image the octopus arm and view the internal tissues. Muscle
layering was mapped and area was measured using AMIRA image processing and the trends in
these layers at the proximal, middle, and distal portions of the arms were analyzed. A total of 39
arms from 6 specimens were scanned to give 112 total imaged sections (38 proximal, 37 middle,
37 distal), from which to ascertain and study the possible differences in musculature. The
images revealed significant increases in the internal longitudinal muscle layer percentages
between the proximal and middle, proximal and distal, and middle and distal sections of the
arms. These structural differences are hypothesized to be used for rapid retraction of the distal
segment when encountering predators or noxious stimuli. In contrast, a significant decrease in
the transverse muscle layer was found when comparing the same sections. These structural
differences are hypothesized to be a result of bending behaviors during retraction. Additionally,
the internal longitudinal layer was separately studied orally, toward the sucker, and aborally,
away from the sucker. The significant differences in oral and aboral internal longitudinal
musculature in proximal, middle, and distal sections is hypothesized to support the pseudo-joint
functionality displayed in octopus fetching behaviors. The results indicate that individual
octopus arm morphology is more unique than previously thought and supports that internal
structural differences exist to support behavioral functionality.
muscular hydrostat, which allows for nearly infinite degrees of freedom of movement without
the structure of a skeletal system. This study employed Magnetic Resonance Imaging with a
Gadoteridol-based contrast agent to image the octopus arm and view the internal tissues. Muscle
layering was mapped and area was measured using AMIRA image processing and the trends in
these layers at the proximal, middle, and distal portions of the arms were analyzed. A total of 39
arms from 6 specimens were scanned to give 112 total imaged sections (38 proximal, 37 middle,
37 distal), from which to ascertain and study the possible differences in musculature. The
images revealed significant increases in the internal longitudinal muscle layer percentages
between the proximal and middle, proximal and distal, and middle and distal sections of the
arms. These structural differences are hypothesized to be used for rapid retraction of the distal
segment when encountering predators or noxious stimuli. In contrast, a significant decrease in
the transverse muscle layer was found when comparing the same sections. These structural
differences are hypothesized to be a result of bending behaviors during retraction. Additionally,
the internal longitudinal layer was separately studied orally, toward the sucker, and aborally,
away from the sucker. The significant differences in oral and aboral internal longitudinal
musculature in proximal, middle, and distal sections is hypothesized to support the pseudo-joint
functionality displayed in octopus fetching behaviors. The results indicate that individual
octopus arm morphology is more unique than previously thought and supports that internal
structural differences exist to support behavioral functionality.
ContributorsCummings, Sheldon Daniel (Author) / Fisher, Rebecca (Thesis director) / Marvi, Hamidreza (Committee member) / Cherry, Brian (Committee member) / Harrington Bioengineering Program (Contributor) / Barrett, The Honors College (Contributor)
Created2019-05
Description
Insurgency within a state is an important and frequent occurrence during armed conflict. The large political science literature on conflict reveals that there are many factors that contribute to insurgency within societies engaged in armed conflict including the scope and intensity of violence, the relative strength of insurgent groups, and the type of regime in power. In addition, there are other relevant issues for understanding the causes of insurgency in a particular place, including greed, grievance, ideology, sociopolitical institutions, geography, ethnicity, and the specific nature of the conflict’s impact on particular communities. In this study, I review the political science literature on conflict as a means of gaining insight on how and why individuals join insurgent groups and the causes and severity of state retaliation against both individuals and insurgent groups. Frameworks within the conflict literature provide a better understanding of key aspects of the U.S. War in Afghanistan from 2002 to 2012. Specifically, I focus on the ways in which these issues are related to the practices and policies of the U.S.
Provincial Reconstruction Teams (PRTs), civil-military joint teams created by the U.S. government, are intended to assist in development and reconstruction projects throughout Afghanistan. The mission of PRTs involve locally grounded engagement linking security and community assistance as a central means of supporting the larger counterinsurgency model. Humanitarian activities as undertaken by PRTs attempt provide stability to civilians that they might otherwise turn toward an insurgent group to find. Ideally, PRTs should understand the factors that cause individual and group insurgency against a state and utilize that knowledge when attempting to address the conflict that results. This study focuses on the successes and shortcomings of the Jalalabad PRT and their implementation of a new project development model in the Nangarhar province in Afghanistan in 2006. It was successful because it directly worked to remediate the underlying causes of insurgency as proposed by the technocratic conceit, with a focus on improved water sanitation and sewage, agriculture, and basic infrastructure. It was unsuccessful because it failed to promote local ownership, the development of a community identity, or a methodology to measure the effectiveness and impact of its projects.
According to the lessons from the conflict literature, the Jalalabad PRT’s actions only partly reduced the factors that lead to individual and group defection into an insurgent group.
In actively working to incorporate the lessons from the conflict literature into the Jalalabad PRT project development model, PRTs will more aptly and successfully achieve their stated goals of providing stability, reconstruction, and security. Without addressing the potential other underlying causes of insurgency, however, U.S. PRTs are unable to produce measurable, empirical reductions to insurgency in Afghanistan.
Provincial Reconstruction Teams (PRTs), civil-military joint teams created by the U.S. government, are intended to assist in development and reconstruction projects throughout Afghanistan. The mission of PRTs involve locally grounded engagement linking security and community assistance as a central means of supporting the larger counterinsurgency model. Humanitarian activities as undertaken by PRTs attempt provide stability to civilians that they might otherwise turn toward an insurgent group to find. Ideally, PRTs should understand the factors that cause individual and group insurgency against a state and utilize that knowledge when attempting to address the conflict that results. This study focuses on the successes and shortcomings of the Jalalabad PRT and their implementation of a new project development model in the Nangarhar province in Afghanistan in 2006. It was successful because it directly worked to remediate the underlying causes of insurgency as proposed by the technocratic conceit, with a focus on improved water sanitation and sewage, agriculture, and basic infrastructure. It was unsuccessful because it failed to promote local ownership, the development of a community identity, or a methodology to measure the effectiveness and impact of its projects.
According to the lessons from the conflict literature, the Jalalabad PRT’s actions only partly reduced the factors that lead to individual and group defection into an insurgent group.
In actively working to incorporate the lessons from the conflict literature into the Jalalabad PRT project development model, PRTs will more aptly and successfully achieve their stated goals of providing stability, reconstruction, and security. Without addressing the potential other underlying causes of insurgency, however, U.S. PRTs are unable to produce measurable, empirical reductions to insurgency in Afghanistan.
ContributorsFloda, Nicole Danielle (Author) / Wright, Thorin (Thesis director) / Rothenberg, Daniel (Committee member) / Dean, W.P. Carey School of Business (Contributor) / Department of English (Contributor) / Barrett, The Honors College (Contributor)
Created2019-05
Description
As the public becomes increasingly aware of the morality of wildlife institutions like zoos and aquariums, these places are now having to face possible negativity and lack of support from their communities. In light of this, these institutions are now focusing their goals and efforts towards conservation education and outreach programs in order to continue contributing to biodiversity conservation. Research has proven that wildlife institutions like zoos and aquariums are effective ways to teach the community about wildlife and conservation. To measure how effective aquariums are at educating their patrons on conservation, a short survey was administered to 100 patrons of the OdySea Aquarium in Scottsdale, Arizona. The object of the survey was to assess which type of conservation messaging was preferred by the general public and if patrons of the aquarium were likely to engage in pro-conservation behaviors after their visit. It was found that the majority of respondents preferred interactive exhibits as their choice to learn about conservation and wildlife. In addition, almost all respondents agreed that they would continue practicing behaviors that supported pro-conservation actions after their visit to the aquarium. My results also showed that patrons of the aquarium were well educated about plastic pollution and the rehabilitation that OdySea accomplishes for the sea turtles due to their overexpression of mentioning plastic in their open-ended questions. My findings indicate that this aquarium is succeeding in promoting conservation and wildlife education as well as supporting cultivation within their patrons that will benefit the future health of this planet.
ContributorsErhardt, Jordan Hanna (Author) / Schuster, Roseanne (Thesis director) / Cheng, Samantha (Committee member) / School of Life Sciences (Contributor) / Division of Teacher Preparation (Contributor) / Barrett, The Honors College (Contributor)
Created2019-05
Description
Bridge is a device that relieves anxiety for people who care for the elderly. It has the face of the analog watch and the inner workings of a smart watch which analyzes the elderly person’s movement to track and recognize patterns. The caretaker has an app on their phone that alerts them when the elderly person breaks an activity pattern which also allows them to quickly and easily communicate with the elderly person to check on them. Bridge also holds the elderly person's personal medical history to allow medical professionals to provide them with better care in the case of an emergency.
ContributorsPowell, Audrey (Co-author, Co-author) / Shin, Dosun (Thesis director) / Wilkymacky, Abby (Committee member) / Dean, Herberger Institute for Design and the Arts (Contributor) / The Design School (Contributor) / Department of Marketing (Contributor) / Barrett, The Honors College (Contributor)
Created2019-05
Description
Bicycles are already used for daily transportation by a large share of the world's population and provide a partial solution for many issues facing the world today. The low environmental impact of bicycling combined with the reduced requirement for road and parking spaces makes bicycles a good choice for transportation over short distances in urban areas. Bicycle riding has also been shown to improve overall health and increase life expectancy. However, riding a bicycle may be inconvenient or impossible for persons with disabilities due to the complex and coordinated nature of the task. Automated bicycles provide an interesting area of study for human-robot interaction, due to the number of contact points between the rider and the bicycle. The goal of the Smart Bike project is to provide a platform for future study of the physical interaction between a semi-autonomous bicycle robot and a human rider, with possible applications in rehabilitation and autonomous vehicle research.
This thesis presents the development of two balance control systems, which utilize actively controlled steering and a control moment gyroscope to stabilize the bicycle at high and low speeds. These systems may also be used to introduce disturbances, which can be useful for studying human reactions. The effectiveness of the steering balance control system is verified through testing with a PID controller in an outdoor environment. Also presented is the development of a force sensitive bicycle seat which provides feedback used to estimate the pose of the rider on the bicycle. The relationship between seat force distribution is demonstrated with a motion capture experiment. A corresponding software system is developed for balance control and sensor integration, with inputs from the rider, the internal balance and steering controller, and a remote operator.
This thesis presents the development of two balance control systems, which utilize actively controlled steering and a control moment gyroscope to stabilize the bicycle at high and low speeds. These systems may also be used to introduce disturbances, which can be useful for studying human reactions. The effectiveness of the steering balance control system is verified through testing with a PID controller in an outdoor environment. Also presented is the development of a force sensitive bicycle seat which provides feedback used to estimate the pose of the rider on the bicycle. The relationship between seat force distribution is demonstrated with a motion capture experiment. A corresponding software system is developed for balance control and sensor integration, with inputs from the rider, the internal balance and steering controller, and a remote operator.
ContributorsBush, Jonathan Ernest (Author) / Zhang, Wenlong (Thesis director) / Sandy, Douglas (Committee member) / Software Engineering (Contributor, Contributor) / Engineering Programs (Contributor) / Barrett, The Honors College (Contributor)
Created2019-05
Description
Alzheimer’s disease (AD) is a neurodegenerative disease resulting in loss of cognitive function and is not considered part of the typical aging process. Recently, research is being conducted to study environmental effects on AD because the exact molecular mechanisms behind AD are not known. The associations between various toxins and AD have been mixed and unclear. In order to better understand the role of the environment and toxic substances on AD, we conducted a literature review and geospatial analysis of environmental, specifically wastewater, contaminants that have biological plausibility for increasing risk of development or exacerbation of AD. This literature review assisted us in selecting 10 wastewater toxic substances that displayed a mixed or one-sided relationship with the symptoms or prevalence of Alzheimer’s for our data analysis. We utilized data of toxic substances in wastewater treatment plants and compared them to the crude rate of AD in the different Census regions of the United States to test for possible linear relationships. Using data from the Targeted National Sewage Sludge Survey (TNSSS) and the Centers for Disease Control and Prevention (CDC), we developed an application using R Shiny to allow users to interactively visualize both datasets as choropleths of the United States and understand the importance of this area of research. Pearson’s correlation coefficient was calculated resulting in arsenic and cadmium displaying positive linear correlations with AD. Other analytes from this statistical analysis demonstrated mixed correlations with AD. This application and data analysis serve as a model in the methodology for further geospatial analysis on AD. Further data analysis and visualization at a lower level in terms of scope is necessary for more accurate and reliable evidence of a causal relationship between the wastewater substance analytes and AD.
GitHub Repository: https://github.com/komal-agrawal/AD_GIS.git
GitHub Repository: https://github.com/komal-agrawal/AD_GIS.git
ContributorsAgrawal, Komal (Author) / Scotch, Matthew (Thesis director) / Halden, Rolf (Committee member) / College of Health Solutions (Contributor, Contributor) / Barrett, The Honors College (Contributor)
Created2019-05
Description
Fantasy football exists as a thought-to-be male dominated space, particularly with respect to the linguistic practices of players. Heteronormativity runs rampant, and fantasy players are not held accountable for the implications of their language. This essay analyzes what the dynamics of fantasy football leagues are, how current linguistic practices shape them, and suggests that women’s participating in fantasy football leagues functions as a type of trash talk that encourages men to address their internalized heteronormativity and create a more welcoming and progressive experience for people of all genders.
ContributorsValov, Jacob John (Author) / Ingram-Waters, Mary (Thesis director) / Ferderer, Brandon (Committee member) / Hugh Downs School of Human Communication (Contributor) / Barrett, The Honors College (Contributor)
Created2019-05
Description
Edge computing is an emerging field that improves upon cloud computing by moving the service from a centralized server to several de-centralized servers that are closer to the end user to decrease the latency, bandwidth, and cost requirements. Field programmable grid array (FPGA) devices are highly reconfigurable and excel in highly parallelized tasks, making them popular in many applications including digital signal processing and cryptography, while also making them a great candidate for edge computation. The purpose of this project was to explore existing board support packages for the Arria 10 GX FPGA and propose a BSP design with multiple partial reconfiguration regions to better support the use of FPGAs in edge computing. In this project, the general OpenCL development flow was studied, OpenCL workflow for Altera/Intel FPGAs was researched, the reference OpenCL BSP was explored to understand the connections between the modules, and a customized BSP with two partial reconfiguration regions was proposed. The existing BSP was explored using the Intel Quartus Prime software suite and the block diagrams for the existing and proposed designs were created using Microsoft Visio.
ContributorsLam, Evan (Author) / Ren, Fengbo (Thesis director) / Vrudhula, Sarma (Committee member) / Computer Science and Engineering Program (Contributor, Contributor) / Barrett, The Honors College (Contributor)
Created2019-05
Description
This experiment analyzed the degradation mechanisms in polymer matrix composite (PMC) samples after more than 50 years of simulated exposure to hygrothermal conditioning. This strong, form-adaptive, lightweight material is suitable for use on critical structures including nuclear powerplants and spacecrafts as primary reinforcers to improve fracture toughness. Current literature regarding PMC material has a poor understanding of its delamination trends and varying interphase properties that determine its overall reliability under extreme weather conditions. This paper will evaluate the long-term impact from exposure to heat and humidity regarding the material’s stiffness and degradation to confirm PMC’s reliability for use in structures that undergo these conditions. To study this phenomenon, aged and unaged PMC samples were analyzed on the nanoscale using PeakForce Quantitative Nanomechanical mode (PF-QNM) of Atomic Force Microscopy with an indentation tip no greater than 10nm in radius. This paper compares this testing method to the results from recent research on other microscopy modes to discuss the validity of the PF-QNM model as it is used for this analysis. The data obtained allowed for analysis of crack propagation and quantification of strength in interphase between the composite’s constituents. This research verifies the testing method for which a comprehensive understanding of the environmental influences on PMC mechanical properties could be achieved.
ContributorsTotillo, Anita (Co-author, Co-author) / Yekani Fard, Masoud (Thesis director) / Patel, Jay (Committee member) / Mechanical and Aerospace Engineering Program (Contributor) / Barrett, The Honors College (Contributor)
Created2019-05