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Research indicates that adolescents with low quality relationships with parents are susceptible to risk of depression. There is little known about how other relationships relate to depression. This study examined adolescent's relationship with parents, romantic partners, and best friends as a predictor of depressive symptoms. A primarily Dutch population of

Research indicates that adolescents with low quality relationships with parents are susceptible to risk of depression. There is little known about how other relationships relate to depression. This study examined adolescent's relationship with parents, romantic partners, and best friends as a predictor of depressive symptoms. A primarily Dutch population of 80 adolescent couples in the age group of 13 to 18 years old (M = 15.48 SD: 1.16) completed the Epidemiological Depression Scale, Investment Scale of Rusbult, along with an Emotional Warmth scale at Time one and then a year later (Time two). Depressive symptoms at Time two was negatively related with adolescent's emotional warmth with parents. There is also a positive correlation between depressive symptoms at Time one and Time two. However, no significant data was found for an association between satisfaction with romantic partner or best friend and depressive symptoms at Time two. These findings indicate that the type of relationship formed with parents might contribute to the depression adolescent's face.
ContributorsShaikh, Mohammad Usama (Author) / Fabes, Richard (Thesis director) / Ha, Phuong Thao (Committee member) / Barrett, The Honors College (Contributor) / Department of Psychology (Contributor)
Created2014-05
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Currently conventional Subtitle D landfills are the primary means of disposing of our waste in the United States. While this method of waste disposal aims at protecting the environment, it does so through the use of liners and caps that effectively freeze the breakdown of waste. Because this method can

Currently conventional Subtitle D landfills are the primary means of disposing of our waste in the United States. While this method of waste disposal aims at protecting the environment, it does so through the use of liners and caps that effectively freeze the breakdown of waste. Because this method can keep landfills active, and thus a potential groundwater threat for over a hundred years, I take an in depth look at the ability of bioreactor landfills to quickly stabilize waste. In the thesis I detail the current state of bioreactor landfill technologies, assessing the pros and cons of anaerobic and aerobic bioreactor technologies. Finally, with an industrial perspective, I conclude that moving on to bioreactor landfills as an alternative isn't as simple as it may first appear, and that it is a contextually specific solution that must be further refined before replacing current landfills.
ContributorsWhitten, George Avery (Author) / Kavazanjian, Edward (Thesis director) / Allenby, Braden (Committee member) / Houston, Sandra (Committee member) / Civil, Environmental and Sustainable Engineering Programs (Contributor) / Barrett, The Honors College (Contributor)
Created2013-05
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A growing body of research suggests a link between adverse childhood experiences and negative health outcomes. However, less is known about where racial discrimination ranks compared to other adverse childhood experiences, such as maltreatment. To address this issue, I conducted two systematic reviews of meta-analyses to compare the magnitudes of

A growing body of research suggests a link between adverse childhood experiences and negative health outcomes. However, less is known about where racial discrimination ranks compared to other adverse childhood experiences, such as maltreatment. To address this issue, I conducted two systematic reviews of meta-analyses to compare the magnitudes of the links between racial discrimination and depressive symptoms and childhood maltreatment and depressive symptoms. My aim was to establish if racial discrimination should be considered an adverse childhood experience. My results demonstrated that the link between racial discrimination and depressive symptoms (r = 0.27) is comparable to the links between 4 different manifestations of maltreatment and depressive symptoms (physical abuse: r = 0.257, emotional abuse: r = 0.301, neglect: r = 0.381, sexual abuse: r = 0.408). I discuss the implications of these findings and propose future research directions.

ContributorsYoo, Joyce Eun-Young (Author) / Causadias, José (Thesis director) / Morris, Kamryn (Committee member) / School of International Letters and Cultures (Contributor) / School of Molecular Sciences (Contributor) / Barrett, The Honors College (Contributor)
Created2021-05
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The present study examined associations between depressive symptoms among mothers, fathers,<br/>and adolescents and considered whether different associations emerged by parent and adolescent<br/>gender. In addition, the combination of maternal and paternal depressive symptoms was<br/>examined in relation to adolescents’ depressive symptoms. Participants were 246 families of<br/>Mexican-origin in two-parent households who resided in

The present study examined associations between depressive symptoms among mothers, fathers,<br/>and adolescents and considered whether different associations emerged by parent and adolescent<br/>gender. In addition, the combination of maternal and paternal depressive symptoms was<br/>examined in relation to adolescents’ depressive symptoms. Participants were 246 families of<br/>Mexican-origin in two-parent households who resided in the Phoenix metropolitan area. Data<br/>were collected during home interviews at Time 1 and phone calls with adolescents at Time 2.<br/>Findings revealed concurrent bivariate associations between adolescents’ and mothers’ and<br/>fathers’ depressive symptoms. Further, mothers’ depressive symptoms predicted increases in<br/>adolescents’ symptoms two years later. However, there were no significant gender differences,<br/>and the combination of mothers’ and fathers’ depressive symptoms did not predict adolescents’<br/>depressive symptoms. These findings contribute to understanding the interrelations between<br/>Mexican-origin mothers’, fathers’, and adolescents’ depressive symptoms.

ContributorsMeneses, Lizbeth Danett (Author) / Updegraff, Kimberly (Thesis director) / White, Rebecca M. B. (Committee member) / Department of Psychology (Contributor) / Barrett, The Honors College (Contributor)
Created2021-05
Description

The purpose of this thesis is to determine whether Tai Chi Qigong or Health Information podcasts are more effective for improving mental health and sleep outcomes for midlife women with mobility impairments. No other studies have been done to investigate whether Tai Chi can be more effective for sleep, depressive

The purpose of this thesis is to determine whether Tai Chi Qigong or Health Information podcasts are more effective for improving mental health and sleep outcomes for midlife women with mobility impairments. No other studies have been done to investigate whether Tai Chi can be more effective for sleep, depressive symptoms, and anxiety for midlife women with mobility impairments specifically. Overall, it was found that midlife women with mobility impairments experienced better sleep when they focused on health information podcasts in comparison to Tai Chi. Change in anxiety and depressive symptoms were negligible.

ContributorsCarvallo, Joanna (Author) / Rastkhiz, Tara (Co-author) / Lee, Rebecca (Thesis director) / Joseph, Rodney (Committee member) / Santana, Robert (Committee member) / Barrett, The Honors College (Contributor) / School of International Letters and Cultures (Contributor) / School of Molecular Sciences (Contributor)
Created2023-05
Description

Descendants of Vietnamese, Laotian, and Cambodian refugees have been impacted by intergenerational trauma as a result of their parent’s trauma from being refugees from the Vietnam War, Secret War, and the Khmer Rouge in the 1970s and 1980s. There are limited studies evaluating the impacts of intergenerational trauma on adult

Descendants of Vietnamese, Laotian, and Cambodian refugees have been impacted by intergenerational trauma as a result of their parent’s trauma from being refugees from the Vietnam War, Secret War, and the Khmer Rouge in the 1970s and 1980s. There are limited studies evaluating the impacts of intergenerational trauma on adult descendants in Southeast Asian (SEA) refugee families. To address this research gap, a quantitative survey was conducted with adult descendants who are 18 years old or older to examine if intergenerational trauma is associated with depressive symptoms among adult Vietnamese, Laotian, and Cambodian Americans whose parents came to the United States as refugees. To recruit participants, both purposive and snowball sampling was used. A total of 66 participants responded to the online survey. The survey consisted of multiple measures that analyzed the relationship between intergenerational trauma and depressive symptoms, including perceived parental trauma, intergenerational/intercultural conflict, acculturation, social support, and demographic characteristics. Statistical analysis was conducted through descriptive statistics and bivariate correlation analysis. Results indicated that intergenerational trauma was not associated with depressive symptoms. However, depressive symptoms were associated with intergenerational/intercultural conflict (r = 0.421, p < .01) and social support (r = -0.383, p < .01). It is possible that acculturation differences between descendants and parents are connected to intergenerational/intercultural conflict and depressive symptoms while social support allows the descendants to feel connected with others, which can reduce depressive symptoms. Culturally adapted family interventions, education, culturally sensitive therapy, and community spaces are possible solutions to addressing depressive symptoms among SEA adult descendants.

ContributorsNguyen, Michael (Author) / Um, Mee Young (Thesis director) / Oh, Hyunsung (Committee member) / Barrett, The Honors College (Contributor) / College of Health Solutions (Contributor) / Watts College of Public Service & Community Solut (Contributor) / School of Public Affairs (Contributor)
Created2023-05
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Description
Environmentally harmful byproducts from solid waste’s decomposition, including methane (CH4) emissions, are managed through standardized landfill engineering and gas-capture mechanisms. Yet only a limited number of studies have analyzed the development and composition of Bacteria and Archaea involved in CH4 production from landfills. The objectives of this research were to

Environmentally harmful byproducts from solid waste’s decomposition, including methane (CH4) emissions, are managed through standardized landfill engineering and gas-capture mechanisms. Yet only a limited number of studies have analyzed the development and composition of Bacteria and Archaea involved in CH4 production from landfills. The objectives of this research were to compare microbiomes and bioactivity from CH4-producing communities in contrasting spatial areas of arid landfills and to tests a new technology to biostimulate CH4 production (methanogenesis) from solid waste under dynamic environmental conditions controlled in the laboratory. My hypothesis was that the diversity and abundance of methanogenic Archaea in municipal solid waste (MSW), or its leachate, play an important role on CH4 production partially attributed to the group’s wide hydrogen (H2) consumption capabilities. I tested this hypothesis by conducting complementary field observations and laboratory experiments. I describe niches of methanogenic Archaea in MSW leachate across defined areas within a single landfill, while demonstrating functional H2-dependent activity. To alleviate limited H2 bioavailability encountered in-situ, I present biostimulant feasibility and proof-of-concepts studies through the amendment of zero valent metals (ZVMs). My results demonstrate that older-aged MSW was minimally biostimulated for greater CH4 production relative to a control when exposed to iron (Fe0) or manganese (Mn0), due to highly discernable traits of soluble carbon, nitrogen, and unidentified fluorophores found in water extracts between young and old aged, starting MSW. Acetate and inhibitory H2 partial pressures accumulated in microcosms containing old-aged MSW. In a final experiment, repeated amendments of ZVMs to MSW in a 600 day mesocosm experiment mediated significantly higher CH4 concentrations and yields during the first of three ZVM injections. Fe0 and Mn0 experimental treatments at mesocosm-scale also highlighted accelerated development of seemingly important, but elusive Archaea including Methanobacteriaceae, a methane-producing family that is found in diverse environments. Also, prokaryotic classes including Candidatus Bathyarchaeota, an uncultured group commonly found in carbon-rich ecosystems, and Clostridia; All three taxa I identified as highly predictive in the time-dependent progression of MSW decomposition. Altogether, my experiments demonstrate the importance of H2 bioavailability on CH4 production and the consistent development of Methanobacteriaceae in productive MSW microbiomes.
ContributorsReynolds, Mark Christian (Author) / Cadillo-Quiroz, Hinsby (Thesis advisor) / Krajmalnik-Brown, Rosa (Thesis advisor) / Wang, Xuan (Committee member) / Kavazanjian, Edward (Committee member) / Arizona State University (Publisher)
Created2022
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Description
Zero-Valent Metals (ZVM) are highly reactive materials and have been proved to be effective in contaminant reduction in soils and groundwater remediation. In fact, zero-Valent Iron (ZVI) has proven to be very effective in removing, particularly chlorinated organics, heavy metals, and odorous sulfides. Addition of ZVI has also been proved

Zero-Valent Metals (ZVM) are highly reactive materials and have been proved to be effective in contaminant reduction in soils and groundwater remediation. In fact, zero-Valent Iron (ZVI) has proven to be very effective in removing, particularly chlorinated organics, heavy metals, and odorous sulfides. Addition of ZVI has also been proved in enhancing the methane gas generation in anaerobic digestion of activated sludge. However, no studies have been conducted regarding the effect of ZVM stimulation to Municipal Solid Waste (MSW) degradation. Therefore, a collaborative study was developed to manipulate microbial activity in the landfill bioreactors to favor methane production by adding ZVMs. This study focuses on evaluating the effects of added ZVM on the leachate generated from replicated lab scale landfill bioreactors. The specific objective was to investigate the effects of ZVMs addition on the organic and inorganic pollutants in leachate. The hypothesis here evaluated was that adding ZVM including ZVI and Zero Valent Manganese (ZVMn) will enhance the removal rates of the organic pollutants present in the leachate, likely by a putative higher rate of microbial metabolism. Test with six (4.23 gallons) bioreactors assembled with MSW collected from the Salt River Landfill and Southwest Regional Landfill showed that under 5 grams /liter of ZVI and 0.625 grams/liter of ZVMn additions, no significant difference was observed in the pH and temperature data of the leachate generated from these reactors. The conductivity data suggested the steady rise across all reactors over the period of time. The removal efficiency of sCOD was highest (27.112 mg/lit/day) for the reactors added with ZVMn at the end of 150 days for bottom layer, however the removal rate was highest (16.955 mg/lit/day) for ZVI after the end of 150 days of the middle layer. Similar trends in the results was observed in TC analysis. HPLC study indicated the dominance of the concentration of heptanoate and isovalerate were leachate generated from the bottom layer across all reactors. Heptanoate continued to dominate in the ZVMn added leachate even after middle layer injection. IC analysis concluded the chloride was dominant in the leachate generated from all the reactors and there was a steady increase in the chloride content over the period of time. Along with chloride, fluoride, bromide, nitrate, nitrite, phosphate and sulfate were also detected in considerable concentrations. In the summary, the addition of the zero valent metals has proved to be efficient in removal of the organics present in the leachate.
ContributorsPandit, Gandhar Abhay (Author) / Cadillo – Quiroz, Hinsby (Thesis advisor) / Olson, Larry (Thesis advisor) / Boyer, Treavor (Committee member) / Arizona State University (Publisher)
Created2019
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Description
A growing body of research suggest that experiencing racial discrimination is associated with the development of mental health problems. Lee and Ahn (2011) conducted a meta-analysis that documented the relationship between racial discrimination and psychopathology, including depressive symptoms among Asian Americans. However, evidence of an increase in racial discrimination in

A growing body of research suggest that experiencing racial discrimination is associated with the development of mental health problems. Lee and Ahn (2011) conducted a meta-analysis that documented the relationship between racial discrimination and psychopathology, including depressive symptoms among Asian Americans. However, evidence of an increase in racial discrimination in the last decade requires examining to what degree its link to depressive symptoms has changed since Lee and Ahn (2011)’s seminal study. To address this issue, I conducted a systematic review of research on racial discrimination and depressive symptoms among Asian Americans from 2009-2019 in the United States. I used PsycINFO, Web of Science, PubMed, and ProQuest Dissertations and Theses Global to perform my search. My aims were to: 1) understand the relationship between racial discrimination and depressive symptoms, 2) understand how studies vary across sex, age, measures, socioeconomic and ethnic subgroup (e.g., Chinese Americans, Vietnamese Americans). My results demonstrated that the relationship between racial discrimination and depressive symptoms was primarily positive. Factors regarding sex, age, measures, and socioeconomic status varied across studies. Future research should focus more on current issues regarding Asian Americans and use meta-analytic techniques to further investigate any potential moderators such as socioeconomic status and ethnic subgroups.
ContributorsWaddington, Margaret Mary (Author) / Causadias, José (Thesis director) / Korous, Kevin (Committee member) / School of International Letters and Cultures (Contributor) / Sanford School of Social and Family Dynamics (Contributor) / Barrett, The Honors College (Contributor)
Created2020-05
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The Beck Depression Inventory II (BDI-II) and the Patient Health Questionnaire 9 (PHQ-9) are highly valid depressive testing tools used to measure the symptom profile of depression globally and in South Asia, respectively (Steer et al., 1998; Kroenke et al, 2001). Even though the South Asian population comprises only 23%

The Beck Depression Inventory II (BDI-II) and the Patient Health Questionnaire 9 (PHQ-9) are highly valid depressive testing tools used to measure the symptom profile of depression globally and in South Asia, respectively (Steer et al., 1998; Kroenke et al, 2001). Even though the South Asian population comprises only 23% of the world’s population, it represents one-fifth of the world’s mental health disorders (Ogbo et al., 2018). Although this population is highly affected by mental disorders, there is a lack of culturally relevant research on specific subsections of the South Asian population.

As such, the goal of this study is to investigate the differences in the symptom profile of depression in native and immigrant South Asian populations. We investigated the role of collective self-esteem and perceived discrimination on mental health.
For the purpose of this study, participants were asked a series of questions about their depressive symptoms, self-esteem and perceived discrimination using various depressive screening measures, a self-esteem scale, and a perceived discrimination scale.

We found that immigrants demonstrated higher depressive symptoms than Native South Asians as immigration was viewed as a stressor. First-generation and second-generation South Asian immigrants identified equally with somatic and psychological symptoms. These symptoms were positively correlated with perceived discrimination, and collective self-esteem was shown to increase the likelihood of these symptoms.

This being said, the results from this study may be generalized only to South Asian immigrants who come from highly educated and high-income households. Since seeking professional help and being aware of one’s mental health is vital for wellbeing, the results from this study may spark the interest in an open communication about mental health within the South Asian immigrant community as well as aid in the restructuring of a highly reliable and valid measurement to be specific to a culture.

ContributorsSwaminathan, Manasa (Co-author) / Murthy, Nithara (Co-author) / Vogel, Joanne (Thesis director) / Kwan, Sau (Committee member) / Sanford School of Social and Family Dynamics (Contributor) / Department of Psychology (Contributor) / Barrett, The Honors College (Contributor)
Created2021-05