Matching Items (366)
Description
Engineering is a multidisciplinary field with a variety of applications. However, since there are so many disciplines of engineering, it is often challenging to find the discipline that best suits an individual interested in engineering. Not knowing which area of engineering most aligns to one’s interests is challenging when deciding on a major and a career. With the development of the Engineering Interest Quiz (EIQ), the goal was to help individuals find the field of engineering that is most similar to their interests. Initially, an Engineering Faculty Survey (EFS) was created to gather information from engineering faculty at Arizona State University (ASU) and to determine keywords that describe each field of engineering. With this list of keywords, the EIQ was developed. Data from the EIQ compared the engineering students’ top three results for the best engineering discipline for them with their current engineering major of study. The data analysis showed that 70% of the respondents had their major listed as one of the top three results they were given and 30% of the respondents did not have their major listed. Of that 70%, 64% had their current major listed as the highest or tied for the highest percentage and 36% had their major listed as the second or third highest percentage. Furthermore, the EIQ data was compared between genders. Only 33% of the male students had their current major listed as their highest percentage, but 55% had their major as one of their top three results. Women had higher percentages with 63% listing their current major as their highest percentage and 81% listing it in the top three of their final results.
ContributorsWagner, Avery Rose (Co-author) / Lucca, Claudia (Co-author) / Taylor, David (Thesis director) / Miller, Cindy (Committee member) / Chemical Engineering Program (Contributor) / Barrett, The Honors College (Contributor)
Created2020-05
Description
The impact of physical/chemical properties of gray water on microbial inactivation in gray water using chlorine was investigated through creating artificial gray water in lab, varying specific components, and then measuring microbial inactivation. Gray water was made through taking autoclaved nanopure water, and increasing the concentration of surfacants, the turbidity, the concentration of organic content, and spiking E. coli grown in tryptic soy broth (TSB); chlorine was introduced using Clorox Disinfecting Bleach2. Bacteria was detected using tryptic soy agar (TSA), and E. coli was specifically detected using the selective media, brilliance. The log inactivation of bacteria detected using TSA was shown to be inversely related to the turbidity of the solution. Complete inactivation of E. coli concentrations between 104-105 CFU/100 ml in gray water with turbidities between 10-100 NTU, 0.1-0.5 mg/L of humic acid, and 0.1 ml of Dawn Ultra, was shown to occur, as detected by brilliance, at chlorine concentrations of 1-2 mg/L within 30 seconds. These result in concentration time (CT) values between 0.5-1 mg/L·min. Under the same gray water conditions, and an E. coli concentration of 104 CFU/100 ml and a chlorine concentration of 0.01 mg/L, complete inactivation was shown to occur in all trials within two minutes. These result in CT values ranging from 0.005 to 0.02. The turbidity and humic acid concentration were shown to be inversely related to the log inactivation and directly related to the CT value. This study shows that chlorination is a valid method of treatment of gray water for certain irrigation reuses.
ContributorsGreenberg, Samuel Gabe (Author) / Abbaszadegan, Morteza (Thesis director) / Schoepf, Jared (Committee member) / Alum, Absar (Committee member) / Chemical Engineering Program (Contributor, Contributor) / Barrett, The Honors College (Contributor)
Created2020-05
Description
Increasing energy and environmental problems describe the need to develop renewable chemicals and fuels. Global research has been targeting using microbial systems on a commercial scale for synthesis of valuable compounds. The goal of this project was to refactor and overexpress b6-f complex proteins in cyanobacteria to improve photosynthesis under dynamic light conditions. Improvement in the photosynthetic system can directly relate to higher yields of valuable compounds such as carotenoids and higher yields of biomass which can be used as energy molecules. Four engineered strains of cyanobacteria were successfully constructed and overexpressed the corresponding four large subunits in the cytochrome b6-f complex. No significant changes were found in cell growth or pigment titer in the modified strains compared to the wild type. The growth assay will be performed at higher and/or dynamic light intensities including natural light conditions for further analysis.
ContributorsNauroth, Benjamin (Author) / Varman, Arul (Thesis director) / Singharoy, Abhishek (Committee member) / Li, Han (Committee member) / Chemical Engineering Program (Contributor) / Barrett, The Honors College (Contributor)
Created2020-05
Description
This research investigated deionized water contact angle measurement reliability with alumina powder using the Washburn method. This method relates the capillary rise of a liquid through a column of packed powder to the contact angle of the system. A reference liquid that is assumed to be perfectly wetting, such as hexane due to the low surface energy, must be used to compare to the tested liquid. Consistency was hypothesized to be achieved with more powder structure and consistency of packing between reference and test trials. The three types of packing structures explored in this study were unstructured, visually-structured (user tapped), and machine-structured tapping. It was also hypothesized that similar contact angle results would be found for different packing methods of the same powder and liquid. However, the average contact angle for unstructured packing was found to be 32.9°, while the angle for the tapped structure was only 11.7°. This large deviation between types of packing shows that there are more inconsistencies with the use of this method than just the regulation of the packing structure. There were two similar glass chromatography columns used, but the second column experienced an unknown interference that led to a delay in the hexane uptake into the powder, which then led to invalid contact angle calculations. There was no discernible relationship between the packing structure and the standard deviation between trials, so the more structured packing does not seem to affect the consistency of results. It is recommended to perform more experiments on a single packing type with different apparatuses and a narrower particle size range.
ContributorsConvery, Brittany Alexis (Author) / Emady, Heather (Thesis director) / Vajrala, Spandana (Committee member) / Chemical Engineering Program (Contributor) / Barrett, The Honors College (Contributor)
Created2017-12
Description
The Experimental Data Processing (EDP) software is a C++ GUI-based application to streamline the process of creating a model for structural systems based on experimental data. EDP is designed to process raw data, filter the data for noise and outliers, create a fitted model to describe that data, complete a probabilistic analysis to describe the variation between replicates of the experimental process, and analyze reliability of a structural system based on that model. In order to help design the EDP software to perform the full analysis, the probabilistic and regression modeling aspects of this analysis have been explored. The focus has been on creating and analyzing probabilistic models for the data, adding multivariate and nonparametric fits to raw data, and developing computational techniques that allow for these methods to be properly implemented within EDP. For creating a probabilistic model of replicate data, the normal, lognormal, gamma, Weibull, and generalized exponential distributions have been explored. Goodness-of-fit tests, including the chi-squared, Anderson-Darling, and Kolmogorov-Smirnoff tests, have been used in order to analyze the effectiveness of any of these probabilistic models in describing the variation of parameters between replicates of an experimental test. An example using Young's modulus data for a Kevlar-49 Swath stress-strain test was used in order to demonstrate how this analysis is performed within EDP. In order to implement the distributions, numerical solutions for the gamma, beta, and hypergeometric functions were implemented, along with an arbitrary precision library to store numbers that exceed the maximum size of double-precision floating point digits. To create a multivariate fit, the multilinear solution was created as the simplest solution to the multivariate regression problem. This solution was then extended to solve nonlinear problems that can be linearized into multiple separable terms. These problems were solved analytically with the closed-form solution for the multilinear regression, and then by using a QR decomposition to solve numerically while avoiding numerical instabilities associated with matrix inversion. For nonparametric regression, or smoothing, the loess method was developed as a robust technique for filtering noise while maintaining the general structure of the data points. The loess solution was created by addressing concerns associated with simpler smoothing methods, including the running mean, running line, and kernel smoothing techniques, and combining the ability of each of these methods to resolve those issues. The loess smoothing method involves weighting each point in a partition of the data set, and then adding either a line or a polynomial fit within that partition. Both linear and quadratic methods were applied to a carbon fiber compression test, showing that the quadratic model was more accurate but the linear model had a shape that was more effective for analyzing the experimental data. Finally, the EDP program itself was explored to consider its current functionalities for processing data, as described by shear tests on carbon fiber data, and the future functionalities to be developed. The probabilistic and raw data processing capabilities were demonstrated within EDP, and the multivariate and loess analysis was demonstrated using R. As the functionality and relevant considerations for these methods have been developed, the immediate goal is to finish implementing and integrating these additional features into a version of EDP that performs a full streamlined structural analysis on experimental data.
ContributorsMarkov, Elan Richard (Author) / Rajan, Subramaniam (Thesis director) / Khaled, Bilal (Committee member) / Chemical Engineering Program (Contributor) / School of Mathematical and Statistical Sciences (Contributor) / Ira A. Fulton School of Engineering (Contributor) / Barrett, The Honors College (Contributor)
Created2016-05
Description
The wettability of powders is an important characteristic for both industry and academia and is often described by the powder’s contact angle with a certain liquid. While there exist many ways to measure contact angle, it is a portion of the powder technology field that is not fully understood and requires more investigation and research. This study investigates two methods for measuring contact angle, the sessile drop method and the Washburn method, and looks to compare results to determine which method offers the most reliable data in terms of accuracy and repeatability. Two powders - microcrystalline cellulose and aluminum oxide - and three liquids - water, 50 cSt silicone oil, and 350 cSt silicone oil - were used to study the differences between the two measurement techniques as well as the effects of varying fluid viscosity on the measurements. It was found that the sessile drop method proved to be an ineffective method for measuring contact angle when liquid penetration into the powder occurred, as the contact angle changed while the drop penetrated. Initial results showed the contact angle for silicone oil on the powders to be greater than 90°, indicating nonwetting of the surface which was inconsistent with observations. The results from the Washburn method align better with other values in similar studies, but more study is needed to confirm the results gathered in this research.
ContributorsSmith, Bryan Alexander (Author) / Emady, Heather (Thesis director) / Rykaczewski, Konrad (Committee member) / Chemical Engineering Program (Contributor) / Barrett, The Honors College (Contributor)
Created2016-05
Description
With each new Disney princess being hailed as finally representing a strong, positive female role model, the images presented by older princesses come into question. This investigation delves into the messages put forth by the Disney princess films and the way in which these ideas are developed within each of their movies. By defining the core of feminism to revolve around agency and the freedom of choice available to the women in the films, each princess' adherence to feminist values was analyzed. All current and expected Disney princesses were evaluated (Snow White, Cinderella, Aurora, Ariel, Belle, Jasmine, Pocahontas, Mulan, Tiana, Rapunzel, Merida, Anna, and Elsa). The princesses were split into five categories to offer comparison and conclusions between women with similar characteristics: the Traditionals, the Dreamers, the Adventurers, the Rebels, and the Non-Conformists. Major findings include the evolution of the marriage ideal presented by Disney, the issue between race and labor within the princess franchise, and the amount of agency each princess is allowed in her movie. Disney presents many stories where the individual wishes of a princess class with her society or community, but not all princesses are successful in going against their cultural values. A majority of the princesses do exercise their agency in their films, but this is done with varying degrees of freedom and choices available to them. Disney's representation of traditional love stories has slowly evolved, now allowing women to pursue other dreams concurrently with romance, or even dreams entirely devoid of love. Disney has also made an effort to branch out with princesses of color and from other cultures, yet these films often end up presenting a cultural critique as opposed to a feminist critique of gender roles. The franchise also seems to present labor as a form of oppression which white princesses must escape while princesses of color do not receive the same respite or salvation at the end of their films. White princesses end with a life of luxury and relaxation that isn't afforded to Disney's princesses of color. Though there is much room for improvement with future Disney princess films, the past princesses are not necessarily as "anti-feminist" as they have been portrayed. Each princess exhibits more autonomy and agency than the last, providing more paths and options for young girls to consider as they grow up watching these films.
ContributorsFerrero Mendoza, Vanessa Cristina (Author) / Dove-Viebahn, Aviva (Thesis director) / Kitch, Sally (Committee member) / Chemical Engineering Program (Contributor) / School of International Letters and Cultures (Contributor) / School of Sustainability (Contributor) / Barrett, The Honors College (Contributor)
Created2016-05
Description
There are problems in the breeding practices of miniature horses. This study seeks to determine the source of these detrimental outcomes based on an evaluation of primary attributes selected for by breeders and the lack of genetic information and understanding of these attributes. In order to do this a program model was created to test the effects of selection criteria on breeder behavior and the resultant foals of these crosses. Moving forwards this program will evolve into a database of the equine genome for different horses. This will allow breeders to input their horses and do faux crosses in order to decrease the incidence of negative and detrimental outcomes.
ContributorsDavis, Marissa Lynn (Author) / Oberle, Eric (Thesis director) / Martin, Thomas (Committee member) / College of Letters and Sciences (Contributor) / Barrett, The Honors College (Contributor)
Created2016-05
Description
The 1878 Treaty of Berlin sought to address the issue of minority rights in order to stabilize the interests of the Great Powers and the international order; however, in their formulation of a treaty intended to save the imperial component of the system, the European imperial powers not only gave one of their official acknowledgments to nationalist principles, but articulated a critique of the existing notion of state protection for ethnic minorities. This tentative but landmark modification of the imperial model of legitimacy suggested Europe or the world could consist of a host of sovereign nations. In so doing, it recognized the political, and ideological changes that nationalism demanded, changes that would reshape how national groups organize politically, culturally, and militarily. The logic of nationalism demanded that new boundaries, conceived on national lines be drawn, and they were drawn, both within the Austro-Hungarian and Ottoman Empires. The Treaty of Berlin led to the formation of Greater Bulgaria and Albania, and these new nationalities formed a initial answer to the European question of minority groups. The Treaty of Berlin is useful to examine in relation to its better-known and much more radical offspring, the Treaty of Versailles. Differences in the approach of either treaty provide a study in the lasting effects of soft power to resolve international conflict. The Great Powers met in Berlin to address a developing crisis in an attempt to avoid a destabilizing regional conflict through diplomatic and legal means, whereas the Paris Peace Conference met at Versailles to develop new order across Europe in the wake of the Great War. The Treaty of Versailles, sharply chiding the Central Powers as it promulgated a victor's peace, hoped to prevent future war by placing economic burdens on Germany. While the conference at Paris acknowledged the minority position, the overwhelming legal focus went to addressing developing nations and nationalisms in a way that was consistent with the beliefs of old imperial rule. The earlier Treaty of Berlin's relative emphasis on minority questions as logically antecedent to the disposition of nationalism becomes of highest significance in retrospect. It is this focused approach to addressing developing nationalism that makes the Treaty of Berlin an important point of discussion. It provides a precedent for how questions of minority rights should be addressed, and where it falls short of an answer on how conflict might be prevented, it explores how the tensions within the international system can exacerbate one another, as they did in the breakdown of diplomacy and law that to the First World War . This thesis aims to address how the triumph of nationalism as a model of state legitimacy almost immediately gave rise to the question of legal protection of minorities. The minority question only became more urgent as nationalists developed policies that practiced first passive, and then active exclusion of minority groups. While nationalism's relation to democratic rule seemed to solve the problems of representative government, it quickly forced the question of how legitimate representation was determined. Shifting notions of political legitimacy, unworkable empires, and heightened international rivalry formed a widening spiral of crisis that eclipsed the minority question, but this thesis supports the belief that the centrifugal force of conflict came out of the avoidance of addressing minority rights completely. Attempts were made through the twentieth century to mitigate conflict between people groups, but many failed to produce fully developed solutions, while many others favored the status quo, seemingly hoping that the question would answer itself. A study of the early history of the minority rights question helps us understand the national question in the old-new light of the international order and questions of international law. Given the conflicts that have arisen out of the relations between nations and the question of minority rights, the minority question is present in much of today's thinking about human rights and the maintenance of international order. Understanding the origins of minority rights and the factors considered in the early negotiations set to address the problem helps develop a deeper understanding of the of the interactions between nations and people today.
ContributorsGobble, Tyler Scott (Author) / Oberle, Eric (Thesis director) / Martin, Thomas (Committee member) / Aviation Programs (Contributor) / Barrett, The Honors College (Contributor)
Created2016-05
Description
It goes without saying that marriage, and the concept of two people staying together for the rest of their lives, is not easy. In today's society, divorce is something that is becoming more and more prominent among people. However, despite the divorce phenomenon there are still success stories of couples who last and manage to stick together despite the odds. It is difficult to measure the "successfulness" of any marriage due to the fact that so many different elements comprise them. However, there are endless assessments available to be used as tools for attempting measurement of success. A majority of them are related to measuring relationship quality in terms of individual satisfaction by focusing on each individual's happiness within the relationship. Obviously, every marriage is different and there are many things that can impact a couple's' likeliness to stay together such as the general circumstances surrounding their union and each partner's willingness to persevere. For instance, there are a variety of different factors that influence the overall success of marriages within and surrounding the United States Military. Such as physical proximity, frequency of communication, and a mutual desire to make the relationship work. Cultivating a relationship in which one partner is a service member and one partner is a civilian is stressful for both people involved. Specifically, the intense stress couples experience associated with deployment can often cause severe problems such as depression and anxiety that may lead to divorce or mental health problems later on down the road. Stressors specifically related to the deployment cycle can contribute to depression among both service members and their spouses. Most of these families face unique stressors through the course of military service and deployments, including frequent relocations and recon�gurations of the family system, ambiguous loss and fear for a loved one's safety, and high levels of stress and/or dysfunction among family members (Flake, Davis, Johnson, & Middleton, 2009; Huebner, Mancini, Wilcox, Grass, & Grass, 2007) Separation , unpredictable duty hours, and single parenting (parenting while the veteran is away either being deployed or on training courses) are just a few of the stressors that face partners of veterans on a regular basis (Padden, Connors & Agazio, 2011). Dr. John Gottman, the executive director of the Relationship Research Institute. has conducted extensive research regarding marital stability and divorce prediction on thousands of couples over the last forty years of his career. Using video cameras, heart monitors, and other biofeedback equipment, he and his colleagues have screened interviewed and tracked what couples experience during moments of conflict and closeness. Over the span of the last forty years, Dr. Gottman has created a theory he calls "The Four Horsemen of the Apocalypse". In the New Testament, the Four Horsemen of the Apocalypse are a metaphor marking the beginning of end times. Dr. Gottman's Four Horsemen on the other hand, are a metaphor marking the beginning of the demise of a marriage. The horsemen include criticism, contempt, defensiveness, and stonewalling. They are communication styles among couples that Dr. Gottman says can predict the end of a relationship. This notion holds true especially in the implication of military relationships. Focusing on the predictors of divorce, and inspecting the elements of these relationships in which the military is a condition of the union, discoveries can be made as to what makes these military relationships more difficult. An examination through the lens of Dr. Gottman's horsemen of the circumstances surrounding these unions in which deployment physically separates the two partners demonstrates how deployment in and of itself can cause couples to encompass each of the horsemen and eventually push them towards divorce. Throughout the course of this paper, the different elements that embody each of the four horsemen will be examined and analyzed as they pertain to the deployment process. Upon completion of the examination of these different factors, it can be suggested that deployment in its nature becomes the harbinger of the apocalypse. By encompassing all the different aspects of the first four original horsemen, and pushing military couples towards the behaviors that lead in the direction of divorce, deployment in and of itself can be thought of as predecessor, or harbinger of the apocalypse.
ContributorsSerdy, Taylor B (Author) / Martin, Thomas (Thesis director) / Mowzoon, Nura (Committee member) / W. P. Carey School of Business (Contributor) / Barrett, The Honors College (Contributor)
Created2017-05