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Electrical Analysis of a PEM Electrolysis Cell
Get PDFPolymer Electrolyte Membrane (PEM) electrolysis is a form of electrolysis that is heavily used in commercial capacities. It functions by using a membrane and an electric charge in order to perform electrolysis water, splitting it into its component parts - Hydrogen and Oxygen. These parts can then be used in a number of different applications, including reversing the electrolysis process to regenerate some energy in the form of electricity. During this experiment, multiple currents were run through a PEM cell, and voltages across the membrane were measured. It was found that a standard R/C charging model can be fit to low current applications of the PEM cell, but beyond very small currents, there is little to no correlation between the data results and the model prediction
A Comparison of Stacking Methods to Estimate Survival Using Residual Lifetime Data from Prevalent Cohort Studies
Get PDFPrevalent cohort studies are widely used for their cost-efficiency and convenience. However, in such studies, only the residual lifetime can be observed. Traditionally, researchers rely on self-reported onset times to infer the underlying survival distribution, which may introduce additional bias that confounds downstream analysis. This study compares two stacking procedures and one mixture model approach that uses only residual lifetime data while leveraging the strengths of different estimators. Our simulation results show that the two stacked estimators outperform the nonparametric maximum likelihood estimator (NPMLE) and the mixture model, allowing robust and accurate estimations for underlying survival distributions
Copper(II) Interaction with Zinc Fingers: Feasibility of Copper(II)-based Drugs
No full textOxidized copper has recently gained attention as a potential therapeutic drug based on its potent redox ability to generate reactive oxygen species (ROS) which can cause oxidative damage to cellular systems. Therefore, it is important to know how Cu(II) will interact with biomolecules. Zinc fingers (ZFs) are metalloproteins that require a zinc ion to maintain structure and function. Owing to the promi- nence of ZFs in biology and because copper has similar binding characteristics as zinc, exogenous copper complexes might interact with endogenous ZFs. This thesis explores the interaction between Cu(II) and two variations of the classical ZF and a RING domain via UV-Vis and fluorescence spectroscopy. Results show that Cu(II) is reduced to Cu(I) and binds to the thiolate site of the ZF, displac- ing the Zn(II) ion. ZFs also obstruct the copper catalyzed production of ROS through copper binding. Phenanthroline, a Cu(II) stabilizing chelator, serves as a surrogate Cu(II)-drug. The Cu(II)-ligand complex increases the efficiency of ROS production in the presence of ZFs relative to free Cu(II) ions. This could suggest the stabilized ligand complex prevents the copper from immediately binding to ZFs and becoming redox silenced. Collectively, these results show that ZFs might be considered a potential target for Cu(II) drugs
Sharp Inequalities of the X-Ray Transform and the Competing Symmetries Argument
Get PDFWe examine the case of a conjecture by Baernstein and Loss pertaining to the operator norm of the -plane transform from space to L^q(\M) space. Previous work on this problem by Carlen and Loss, as well as by Drouot, has used an iterative technique known as the ``competing symmetries argument’’ to prove this conjecture in the and cases. We summarize the conjecture and this proof technique, then perform work that strongly suggest that no sufficiently ``nice” transformation exists that can be used to apply the competing symmetries argument to other cases of the conjecture
Feelings Are Hard: The Influence of Parent Emotion Socialization, the Social Sharing of Emotions, and Emotion Regulation Strategies on Peer Relationship Quality
Get PDFEmerging adulthood (ages 18 to 29, typically in western cultures) is a period of high emotional volatility and shifts in peer relationships; therefore, the link between emotion regulation strategies (reappraisal, distraction, rumination, and suppression) and peer relationship quality must be examined. Furthermore, previous literature has found that supportive parent emotion socialization is related to healthier emotion regulation strategies in children. Study 1 found that reappraisal mediated the relationship between supportive parent emotion socialization and communication, suggesting that supportive parent emotion socialization teaches children to use reappraisal more, which aids in communication. Due to the link between emotion regulation and communication displayed in Study 1, Study 2 again examined the relationship between emotion regulation strategies and peer relationship quality, this time with the social sharing of negative emotions as a mediating variable. Results showed that the quality of social sharing, but not the number of times participants socially shared, mediated the relationship between suppression and average peer relationship quality. Given these findings, supportive emotion socialization and the (qualitative) social sharing of negative emotions are important when examining the relationship between emotion regulation strategies (specifically, reappraisal and suppression) and peer relationship quality
Let The People Speak: How Verbatim Theater Allows Historically Marginalized Groups Tell Their Stories
Get PDFmotherhood: the good, bad, and ugly was born out of my research of Verbatim Theater, specifically the practices of Anna Deavere Smith, The Tectonic Theater Project, and Eve Ensler; and the lack of fully fleshed out mother characters represented in theatre. In my research, I focused on how these different playwrights crafted their plays, identified the topic or event they wanted to explore, and the selection of their subjects. During the pandemic, I had the idea to create a theater piece that would tell the good, the bad, and the ugly of motherhood because in the media especially in the theater I only saw the two extremes of the selfless mother who had zero identity beyond her children and the evil stepmother. I find this trope to be very problematic because it perpetuates the monolithic narrative that once someone has a child, they must put everything else on hold so they can care for their child and be a “good mother”.
Like in the works of Twilight: Los Angeles, 1992, The Laramie Project, and The Vagina Monologues it was important to me to have stories from various racial, ethnic, socioeconomic, ages, marital statuses, and sexual orientations, but due to time restraints, I recognize that my play does not have examples from all of these identities. To begin my process, I came up with a series of questions like, “Tell me about the day you found out you were pregnant?” and “What are your plans for after your kids move out?”, to prompt my interviewees. My interview process was a bit different from the playwrights that I researched because I conducted one on one interviews and four talking circles that ranged from three participants to six. To select my subjects, I reached out to all the mothers I knew and encouraged them to suggest mothers who they thought would be interested. My reasoning for utilizing different mediums was to make my subjects feel comfortable and also generate as much material as possible in a short period of time. Over the course of the interview process, I interviewed twenty mothers via Zoom and used the software Otter.ai to transcribe their words. The one-on-one interviews ranged from twenty minutes to an hour, while the talking circles were a set hour, however, they could have gone on for much longer. Following the interviews, I went back to the transcripts generated by Otter.ai correcting mistakes and identifying speakers. Like The Tectonic Theater Project’s process, with the Macalester Theater Collective, the group read the collected material aloud and identified moments that stuck out to them or moments that were confusing or redundant. After receiving their feedback, I went through four drafts which were overseen by my advisor Miranda Rose Hall, who would give me weekly feedback. We need to make space for mothers to tell their stories free of guilt and shame, but instead with acceptance and love
Sum Christiana: Perpetua\u27s Patriarchy-Defeating Agency
Get PDFThe early Christian text, Passio sanctarum Perpetuae et Felicitatis, outlines the martyrdom of Vibia Perpetua and fellow catechumens in North Africa in 203 B.C. By looking at the original Latin text and contextualizing the story in its Carthiginian context and focusing on the words exchanged between Perpetua and her paterfamilias and the descriptions concerning them, this deeper analysis situates Perpetua’s agency. Perpetua inverts the role of the paterfamilias, which can be seen through her language choice. Moreover, Perpetua’s paterfamilias’ change in word choice reflects Perpetua’s ability to make her own choices in the male-dominated Roman society. Perpetua defies societal, gender, and familial roles and finds her own sense of patriarchy-defeating agency while continuing to profess her faith, sum Christiana
The Sounds of Home: A Composition Portfolio
Get PDFWhat does home sound like? I have spent most of my recent life outside my homeland, the Philippines, especially during the Covid-19 pandemic, and this question of what home is has become a persistent thought, if not, a necessary inquiry. This composition portfolio attempts to answer that question in three varying pieces. The first, The Sounds of Home, is a string quartet in three movements where each one tells a personal story by invoking Filipino folk and indigenous themes. The second, Commuting in Manila, is a wind septet that sonically emulates the commuting experience in Manila from the viewpoint of a working-class Filipino. The third, The Fantasy of the Consoled, is a solo piano piece that reflects the way I see the process of consoling and being consoled during difficult times through an inventory of my improvisations and mannerisms on the piano. In sum, these pieces together probe the idea of home in three ways: as nation, as landscape, and as self
King Behind Colonial Curtains: Kasilag and the Making of Filipino National Culture
Get PDFFilipino National Artist Lucrecia “King” Kasilag sought to preserve folk cultures and melded these with her Western training to produce works—scholarly, pedagogical, and compositional—that shaped national music and culture. This thesis is a critical biography that combines perspectives from postcolonial studies, political economy, and musicology to highlight forces that shaped Kasilag’s life while illustrating her successes and shortcomings on national culture. Through this biography, I argue, Filipino national culture must originate from intersectional struggles and negotiation among elites and masses; that this culture is about both resistance and acceptance—a national culture that is syncretic and quintessentially dynamic
