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- Creators: Arizona State University
- Creators: Marine Biological Laboratory Archives
Description
This research aimed to examine college students’ perceived racial discrimination, mental health, and differences of these variables by US citizenship to promote healthier mental health practices within Asian college students. Mental disorders are a leading cause of suicidal ideation, which is the fourth leading cause of death among teenagers and young adults, becoming a global phenomenon. The rate of mental health problems, including anxiety and depression, have steadily increased in a decade, with higher rates among racial and ethnic minorities. More than half of adults with serious mental illnesses haven't received treatments, with minorities being more likely to delay or fail seeking mental health treatments due to cultural and structural barriers such as cultural stigma, racial discrimination, acculturation, and language, making it more difficult to address the inaccessibility to high mental health care services, especially for Asians. The findings of this study suggest that, compared to international students, domestic students have greater mental health service seeking intention, received worse racial discrimination (subject to slurs and suspiciousness) and worse mental health since Covid-19, and determined language concordance between patient and healthcare provider is important. International students have more negative beliefs towards the difficulties of treatment and care of mental illnesses and determined ethnicity concordance between patient and healthcare provider is important. The findings provide preliminary insight to acknowledge the differences between domestic and international students in their perceived racial discrimination and mental health. Furthermore, based on findings the issue can be addressed by implementing a mixed-method approach on collecting disaggregated data among this population, removing language and stigmatic barriers to mental health services by education, and promoting cultural competency among mental health workers.
ContributorsNguyen, Evie (Author) / Chen, Angela (Thesis director) / Han, SeungYong (Committee member) / Barrett, The Honors College (Contributor) / School of Molecular Sciences (Contributor)
Created2023-05
Description
Background: The COVID-19 pandemic has been causing high rates of hospitalization and death among the marginalized Asian American Pacific Islander (AAPI) community. Disaggregated data revealed low COVID-19 vaccine uptake among Korean Americans/Immigrants (KA/I) due to vaccine-related fears unaddressed by cultural and linguistic barriers. Prior evidence demonstrates that digital storytelling (DST) is an effective medium to improve recommended vaccine intent and uptake among AAPIs. Objective: This DNP project aimed to assess the effect of DST intervention on improving KA/I’s COVID-19-related vaccine hesitancy, intent, and uptake. Methods: A quasi-experimental design was conducted, with participants (n=4) self-identifying as KA/I adults with English or Korean fluency residing in the U.S. Participants were recruited online via convenience sampling from CARE (Collaborative Approach for AAPI Research and Education). Individuals who had already received COVID-19 vaccines were excluded. The intervention included two first-person audiovisual stories documenting the personal experience of receiving the COVID-19 vaccine. Outcomes were measured via a pre-post-1-month-follow-up survey utilizing a modified Vaccine Hesitancy Scale (? = 0.72) and Narrative Quality Assessment Tool (? = 0.78-0.81). Results: DST intervention had a marginally significant effect on lowering post-COVID-19 vaccine hesitancy scores (p = 0.068). Participants (n=2) who rated the DST videos with a higher score indicated vaccine uptake at one-month follow-up. Conclusion: This cost-effective, sustainable, and scalable DST evidence-based project has the potential to promote COVID-19 vaccination among KA/I and other AAPI groups with appropriate modification.
ContributorsYoon, Paula (Author) / Chen, Angela (Thesis advisor) / Arizona State University. College of Nursing & Healthcare Innovation (Contributor)
Created2022-05-01
Description
Purpose & Background: Nurses regularly have encounters with traumatic and stressful events
which can have deleterious effects on their physical and psychological well-being and lead to burnout. The Covid-19 pandemic has further exacerbated the stress on nurses. The purpose of this project is to evaluate if an evidence-based, guided mindfulness-based intervention would reduce burnout levels among registered nurses (RNs) working in in-patient settings.
Methods: Participants enrolled in nursing programs from a local university were recruited for the project with the following inclusion requirements: (1) RNs working in an in-patient setting, (2) aged 18 years old or older; (3) fluent in the English language. Participants completed a pre-survey and then enrolled in a free mindfulness application via their phone or computer. Participants listened to one ten-minute mindfulness session for a consecutive ten days and then completed a post-survey.
Results: Data collected from the pre and post surveys included the use of the following valid and reliable instrument tools: Copenhagen Burnout Inventory, Brief Resiliency Coping Scale, and Short Form Health Survey. Data was analyzed using descriptive statistics and the Wilcoxon Signed Ranks Test. The analyzed data showed that there was statistical significance in decreased burnout levels, increased resiliency, and increased health perceptions of the participants.
Conclusion: By finding ways to cope with the experience of burnout in nurses, nurses’ mental health wellness can improve in order for nurses to continue to be an integral part of the healthcare system.
ContributorsPanopio, Christine (Author) / Chen, Angela (Thesis advisor) / Arizona State University. College of Nursing & Healthcare Innovation (Contributor)
Created2022-05-06
Description
With the advent of new advanced analysis tools and access to related published data, it is getting more difficult for data owners to suppress private information from published data while still providing useful information. This dual problem of providing useful, accurate information and protecting it at the same time has been challenging, especially in healthcare. The data owners lack an automated resource that provides layers of protection on a published dataset with validated statistical values for usability. Differential privacy (DP) has gained a lot of attention in the past few years as a solution to the above-mentioned dual problem. DP is defined as a statistical anonymity model that can protect the data from adversarial observation while still providing intended usage. This dissertation introduces a novel DP protection mechanism called Inexact Data Cloning (IDC), which simultaneously protects and preserves information in published data while conveying source data intent. IDC preserves the privacy of the records by converting the raw data records into clonesets. The clonesets then pass through a classifier that removes potential compromising clonesets, filtering only good inexact cloneset. The mechanism of IDC is dependent on a set of privacy protection metrics called differential privacy protection metrics (DPPM), which represents the overall protection level. IDC uses two novel performance values, differential privacy protection score (DPPS) and clone classifier selection percentage (CCSP), to estimate the privacy level of protected data. In support of using IDC as a viable data security product, a software tool chain prototype, differential privacy protection architecture (DPPA), was developed to utilize the IDC. DPPA used the engineering security mechanism of IDC. DPPA is a hub which facilitates a market for data DP security mechanisms. DPPA works by incorporating standalone IDC mechanisms and provides automation, IDC protected published datasets and statistically verified IDC dataset diagnostic report. DPPA is currently doing functional, and operational benchmark processes that quantifies the DP protection of a given published dataset. The DPPA tool was recently used to test a couple of health datasets. The test results further validate the IDC mechanism as being feasible.
Contributorsthomas, zelpha (Author) / Bliss, Daniel W (Thesis advisor) / Papandreou-Suppappola, Antonia (Committee member) / Banerjee, Ayan (Committee member) / Shrivastava, Aviral (Committee member) / Arizona State University (Publisher)
Created2023
Description
In this work, secretion of free fatty acids (FFAs) and ω-hydroxy FFAs wasachieved in the model cyanobacterium Synechocystis sp. PCC 6803 (Synechocystis), and
FFAs were detected by a novel fluorescence assay. Current methods of detecting FFA
concentrations, including HPLC-based and GC-based methods or enzyme-based kits,
have hindered research advancement due to their laborious and/or expensive nature. The
work herein establishes a novel, rapid, fluorescence-based assay for detecting total FFA
concentrations secreted by Synechocystis FFA secretion strains. The novel FFA-detection
assay demonstrates the efficacy of using Nile Red as a fluorescent reporter for laurate or
palmitate at concentrations up to 500 µM in the presence of cationic surfactants. Total
FFA concentrations in Synechocystis supernatants quantified by the novel, Nile Red fluorescence-based assay are demonstrated herein to be highly correlative to total FFA
concentrations quantified by LC-MS; this correlation was seen in supernatant samples of
wild type Synechocystis and Synechocystis FFA secretion strains, both in 96-well plates
and 30-mL, aerated culture tubes.
This work also establishes the expression of a cytochrome P450 fusion enzyme,
CYP153A-CPRmut, or a monooxygenase system from Pseudomonas putida GPo1,
AlkBGT, in FFA secretion strains of Synechocystis for the generation of ω-hydroxy
laurate from laurate. After finding greatly increased ω-hydroxylation activity of
CYP153A-CPRmut with concurrent superoxide dismutase and catalase overexpression, 55
or 1.5 µM of ω-hydroxy laurate were produced over five days by Synechocystis strains
expressing CYP153A-CPRmut or AlkBGT, respectively. As further indication of the
presence of reactive oxygen species affecting ω-hydroxy laurate production with
Synechocystis strains expressing CYP153A-CPRmut, concentrations of ω-hydroxy laurate
in the supernatant increased over two-fold in the presence of 250 µM of the anti-oxidant,
methionine, in bench-scale cultures and in 96-well plate cultures. Additionally, a
mutation at the 55th amino acid position in AlkB (tryptophan to cysteine; AlkBW55C),
resulted in a more than two-fold shift in AlkB’s substrate preference from decanoate
towards the desired substrate, laurate. As a result, Synechocystis expressing AlkBW55C
could produce 5.9 µM ω-hydroxy laurate and 2.0 µM dodecanedioic acid over five days
of growth.
ContributorsAshe, Christopher (Author) / Vermaas, Willem Fj (Thesis advisor, Committee member) / Wang, Xuan (Committee member) / Nielsen, David R (Committee member) / Misra, Rajeev (Committee member) / Arizona State University (Publisher)
Created2023
Description
This thesis expands the scope of literature surrounding the work of Juno Calypso, Christina Quarles, and Lisa Yuskavage by increasing the scope of their theoretical interpretations. Juno Calypso’s case requires establishing a critical foundation for her interrogations of domestic space, her subversions of feminine performance—particularly through accusatory address of the gaze—and her demonstrations of the new-hysterical process that I argue for via her alter-ego, “Joyce.” Similarly, I emphasize Christina Quarles’ subversions of art historical traditions, such as the gaze, meta-framing, and figural language, instead of her explorations into race and linguistic titular play. Finally, Lisa Yuskavage’s inclusion will bring discussions of her contemporary artworks fully into the present, leaving behind the scandalous-or-not questions plaguing her oeuvre in favor of contemporary figural reinterpretation. Through comparisons of each one’s approach to contemporary, artistic feminist theories and dilemmas, the artists convey informative insights into today’s visual culture. The thesis brings these ruminations to light through study of Calypso’s, Quarles’, and Yuskavage’s shared themes and characteristics, including subconsciously-influenced practices, multiplicity, and uncanny space. I account for one of Calypso’s most crucial yet divergent strategies of spatial uncanniness—gendered space. Calypso, Quarles, and Yuskavage are also linked by their ostensibly domestic spaces and featuring feminized figures. Yuskavage uses hyperfeminine performance as means of questioning the conventional and the pleasure one expected to receive from it; Quarles instead uses ambiguity to challenge the traditional white femininity assigned to subjecthood in order to reinforce her dissolution of race and gender. Unanswered performance and gaze questions of femininity, feminine performance and feminine rituals drive Calypso’s photographs, in which an onlooker’s voyeurism is highlighted by their mid-procedure state. Yuskavage uses the home as extension of cheesy self, a site of performance, but Quarles uses domestic spaces as sites or causes of internal struggle. Calypso is closer aligned to Yuskavage’s intersectional-feminist anxieties than Quarles’ post-pandemic ones. The temporal span of the artworks’ creation (2015-2022) is reflective of the dramatic social paradigm shifts experienced by Western societies post-BLM and other social movements, and post-COVID pandemic; the arguments made by this essay will contribute to the understanding of ongoing change experienced by women.
ContributorsBugno, Celia (Author) / Fahlman, Betsy (Thesis advisor) / Anderson, Lisa (Committee member) / Hoy, Meredith (Committee member) / Arizona State University (Publisher)
Created2023
Description
Airports are a critical component of a region’s network and socioeconomic development. Regardless of the type of airport–commercial, general, regional, national, or international–their construction and development are highly advantageous to communities. Some advantages include, but are not limited to new job opportunities, access to the global market, and increased economic activity. Nonetheless, airport development has some downsides that a community must always account for. These downsides directly impact the sustainability of a region; greenhouse gas (GHG) emissions, energy inefficiencies, water pollution, air pollution, and waste are just a few examples. However, twenty-first century global sustainability efforts are shifting the dynamic of sustainability practices in the U.S. The fight for a balance between socioeconomic benefits and the minimization of negative environmental impacts is advancing thanks to the development and implementation of sustainable practices and technology. For instance, U.S. airport development has seen a rise in the use of sustainable construction technologies and practices. Some of the examples of construction technologies and practices implemented in sustainable airport development are virtual design and construction, Spot by Boston Dynamics, prefabrication, and others. The multiple-case studies based on these technologies and practices indicate joint efforts for sustainability by the aviation and construction industries.
ContributorsPalacios, Martha Dennise (Author) / Cirillo, Michael (Thesis advisor) / Faith, Edward (Committee member) / Pearson, Michael (Committee member) / Arizona State University (Publisher)
Created2023
Description
High-performance polymers (HPPs) have dominated the synthetic polymer market for critical applications, including aerospace, energy, microelectronic, and transportation industries since their development in the mid-1900s. Although their structures share general similarities, such as high aromatic content, HPPs offer wide structural variance providing amorphous and semi-crystalline systems. As a result, conventional processing methods employed for HPPs are energy intensive and accessible part geometry is limited; often requiring subsequent subtractive techniques, i.e.,; milling, to obtain high quality and performant parts. Traditional processes were challenged by the emergence of advanced manufacturing techniques, such as 3D printing, which spurred significant academic and industrial interest. In the first project, poly(arylene ether sulfone)s (PSU) were chemically modified post-polymerization to enable ensuing photopolymerization of high molecular weight (Mn) PSU solutions into complex shapes with vat photopolymerization (VP). The resulting materials exhibited fast crosslinking, but low and unstable plateau storage moduli (G’). To overcome this, addition of low molecular weight crosslinker and precise control of UV irradiation increased crosslink density and inhibited photodegradation events, respectively. Ultimately, these modifications facilitated the first report of PSU structures fabricated with a UV-assisted AM modality. Next, 3D printable polyimides (PIs) were synthesized and extensively characterized to further expand the HPP AM toolbox. However, fully aromatic PIs pose a significant challenge as most are insoluble, intractable, and lack any discernable viscous flow. AM PIs were produced using two distinct approaches previously reported in the Long research group; the pendant salt approach imparts photoreactivity through the neutralization of the poly(amic acid) intermediate with small molecule amino-acrylates while the polysalt approach employs dicarboxylate-diammonium ionic organization to template the PI amongst an acrylic scaffold. Through the pendant salt approach, water soluble PI precursors enabled facile AM of complex structures, which served as efficient carbon precursors. The polysalt approach offers superior solid content and solution viscosities; however, these highly polar solutions initially exhibited deleterious side reactions. Application of acid-base fundamentals provided novel printable polysalt solutions with extended shelf-life, reproducible printing, and simplified processing. The relationships established from these projects expanded the applications of the most performant synthetic polymers and will inform future polymer design for additive manufacturing.
ContributorsWeyhrich, Cody (Author) / Long, Timothy E (Thesis advisor) / Williams, Christopher B (Committee member) / Biegasiewicz, Kyle F (Committee member) / Jin, Kailong (Committee member) / Arizona State University (Publisher)
Created2023
Description
I examine whether a stock’s inclusion in green exchange traded funds and mutualfunds (GMFs) affects liquidity and analyst following. I base these predictions on prior
literature that establishes that a firm’s pro-ESG (Environmental, Social, and Governance)
orientation can spur investors’ interest and mitigate investors’ agency concerns (by
signaling that managers are pro-social). I test these predictions using difference-indifferences
models of monthly turnover, bid-ask spread, and analyst coverage to examine
whether firm liquidity, trading costs, and analyst following improve post-GMF inclusion.
I find support for all three predictions, even though GMF ownership in my sample is
exceedingly modest. Importantly, I identify my treatment effects as incremental to the
liquidity boost firms receive when added to conventional mutual funds and exchange
traded funds (ETFs). Together, these results suggest that GMF inclusion is perceived as
an informative signal of a firm’s green credentials, which leads to more trading volume,
lower trading costs, and more analyst participation.
ContributorsHolden, Nicole (Author) / White, Roger (Thesis advisor) / Brown, Jenny (Committee member) / Kaplan, Steve (Committee member) / Arizona State University (Publisher)
Created2023
Description
There has been a significant growth in the distributed energy resources (DERs) connected to the distribution networks in recent years. For a distribution system with a high penetration of DERs, a detailed modeling and representation of the distribution network is needed to accurately assess its steady-state and dynamic behavior. In this dissertation, a field-validated model for a real sub-transmission and distribution network is developed, including one of the feeders modeled with the secondary network and loads and solar PV units at their household/user location. A procedure is developed combining data from various sources such as the utility database, geoinformation data, and field measurements to create an accurate network model.
Applying a single line to ground fault to the detailed distribution feeder model, a high voltage swell, with potentially detrimental impacts on connected equipment, is shown in one of the non-faulted phases of the feeder. The reason for this voltage swell is analyzed in detail. It is found that with appropriate control the solar PV units on the feeder can reduce the severity of the voltage swell, but not entirely eliminate it.
For integrated studies of the transmission-distribution (T&D) network, a T&D co-simulation framework is developed, which is capable of power flow as well as dynamic simulations, and supports unbalanced modeling and disturbances in the distribution as well as the sub-transmission system. The power flow co-simulation framework is developed as a module that can be run on a cloud-based platform.
Using the developed framework, the T&D system response is studied for balanced and unbalanced faults on the distribution and sub-transmission system. For some faults the resultant loss of generation can potentially lead to the entire feeder tripping due to high unbalance at the substation. However, it is found that advanced inverter controls may improve the response of the distribution feeders to the faults. The dissertation also highlights the importance of modeling the secondary network for both steady-state and dynamic studies. Lastly, a preliminary investigation is conducted to include different dynamic elements such as grid-forming inverters in a T&D network simulation.
ContributorsThakar, Sushrut (Author) / Vittal, Vijay (Thesis advisor) / Ayyanar, Raja (Thesis advisor) / Hedman, Mojdeh (Committee member) / Ramapuram Matavalam, Amarsagar Reddy (Committee member) / Arizona State University (Publisher)
Created2023