Digital Commons Network^™

The Effects Of Combined Evaluative And Memo, Matrix, And Graphic Objective Feedback On Performance When Receiving Fixed Pay, Amber L. Derthick

Dissertations

The purpose of this current study was to examine the relative effectiveness of written feedback in the form of a memo that displays the performer’s current performance (memo feedback), written feedback in the form of a matrix that displays the performer’s current performance along with past performance (matrix feedback), and graphic feedback that displays the performer’s current performance along with past performance on a line graph (graphic feedback) when individuals receive fixed pay. The memo, matrix, and graphic feedback displayed “objective” feedback. Participants were 70 undergraduate students who were randomly assigned to one of the four conditions. Participants attended a …

Pathways To Leadership In A Professional Association, Cheryl Lynn Endres

Dissertations

This purpose of this exploratory qualitative study was to explore the experiences of former volunteer leaders who served in the role of president for a professional association. A qualitative design framed by phenomenology is appropriate when seeking to understand individual reflections on a common experience (Brinkmann, 2008, Patton, 2018, Creswell & Poth, 2018). The research was framed as exploratory due to the limited qualitative studies on leadership in professional associations, and more information to understand this experience can be gained by using the qualitative phenomenological method. The phenomenon of focus in this study is motivations related to volunteer leadership, in …

From Doctoral Student To Professor: The Professional Socialization And Career Development Of International Counselor Educators, Ayla Martine Ludwig

Dissertations

Becoming a counselor educator is a complex and rigorous process wherein students grow both personally and professionally (Dollarhide et al., 2013). Throughout this process, students develop in accordance with doctoral competency standards (CACREP, 2021) which help socialize them into the role of professor. For international learners, their education has historically included unique challenges such as language barriers (Behl et al., 2017; Hegarty, 2014; Jang et al., 2014; McDowell et al., 2012; Ng, 2012; Pollock et al., 2017; Sato & Hodge, 2015; Sherry et al., 2010), cultural adjustment (Jang et al., 2014; Kuo et al., 2018; Woo et al., 2015), and …

Shigella Flexneri Diguanylate Cyclases Regulate Pathogenesis, Ruchi Ojha

Dissertations

The intracellular human pathogen Shigella invades the colonic epithelium to cause disease. Prior to colon invasion, this bacterium navigates through different environments within the human body, including acidic conditions in the stomach and the small intestine which contains antimicrobial molecules including bile acids. To adapt to changing environments, Shigella uses the bacterial second messenger c-di-GMP signaling system. C-di-GMP is synthesized by diguanylate cyclases (DGCs) encoding GGDEF domains. Shigella encodes 10 DGCs in its genome, but 6 of these genes have acquired mutations that presumably inactivated the c-di-GMP synthesis activity of these enzymes. In this study, we first expressed VCA0956, a …

Longitudinal Evaluation Of Vitamin D Concentrations In Relation To The Onset Of Type 2 Diabetes In American Adults: A Secondary Data Analysis, Kathryn Michelle Schurr

Dissertations

Background: Prior research has suggested that low levels of Vitamin D may have negative effects on various biological functions, including Type 2 diabetes. The relationship between Vitamin D and the risk of Type 2 Diabetes has not yet been fully investigated. The objective of this research is to examine patients’ laboratory test data longitudinally to determine how vitamin D and other covariates of interest affect Type 2 diabetes status over time.

Methods: This study used retrospective data review from Quest Diagnostics from January 1, 2010, through December 31, 2022. Patients included in the study were required to have consecutive test …

New Alternative Methods Developed For The Measurement Of Active And Total Clay In Foundry Green Sands, Piao Jian Tan

Dissertations

Precise measurement of active clay content in molding sand is essential in the metal casting foundry to produce high quality end products with no defects. The historical methylene blue (MB) test was considered qualitative, subjective and prone to operator bias in regard to the reading of the halo. A new spectrophotometric or digital clay technique has been developed. The test utilizes the cation exchange capabilities of the Cu(II)-triethylenetetramine dye and the absorbance reading of the sequestered solution through a UV-Vis spectrophotometer. Working with multiple laboratories (Decher, MTI, EJ, and JD) on actual foundry green sand samples, the method was optimized …

Establishing Practical Equivalence Of Factor Loadings In Multigroup Confirmatory Factor Analysis, Christopher Edward Shank

Dissertations

This dissertation compares the performance of equivalence test (EQT) and null hypothesis test (NHT) procedures for identifying invariant and noninvariant factor loadings under a range of experimental manipulations. EQT is the statistically appropriate approach when the research goal is to find evidence of group similarity rather than group difference; despite this, the conventional approach to measurement invariance analysis relies upon NHT. EQT has proved effective for invariance detection using global model-data fit statistics in simulated and real-world data (Counsell et al., 2020) but its use in partial measurement invariance (PMI) analysis for evaluation of factor loading differences between groups has …

Beneficial Effects Of Exercise On Glial Cell Line-Derived Neurotrophic Factor Content And Endplate Morphology In Skeletal Muscle Of Aging Male And Female Rats, Juliana M. Vangyseghem

Dissertations

Premenopausal women display lower incidence and severity of neurological disease compared to men of the same age, yet these populations are often treated similarly. A decline in neuromuscular function is associated with aging, which may be partially explained by a decline in neurotrophic factor expression with age. A possible way to maintain neuroprotection would be to regulate the production and release of a target-derived neurotrophic factor, such as glial cell line-derived neurotrophic factor (GDNF). GDNF has been shown to be the most potent survival factor for motor neurons and GDNF content of skeletal muscle has been shown to increase with …

Synthesis And Characterization Of Heavy-Metal Oxoanion- And Phosphonate-Binding Nanojars, Pooja Singh

Dissertations

Nanojars are an emerging class of anion-binding and extraction agents. These supramolecular coordination complexes (2 nm wide) exhibit exceptional anion binding strength that points to their possible application in the recovery of toxic or valuable anions from water bodies. Nanojars of the formula (TBA)2[XO3/42−⸦{CuII(μ-OH)(μ-pyrazolate)}n] (TBA = tetrabutylammonium cation; XO3/42− = anion; X = Se, Te, Cr, Mo, W, HP, HAs, HV; n = 26 – 36) are synthesized from Cu2+, OH−, pyrazole and the TBA salts of various anions. Nanojars possess hydrophobic exteriors with an array of pyrazolate ligands and hydrophilic interiors with a …

Identity And Alterity In A Comedy Series From Santa Cruz, Bolivia, During The Presidency Of Evo Morales, Anita L. Zandstra,

Dissertations

This dissertation explores the construction of social identity and social difference in and through Neo/Los Mismos, a Bolivian comedy series produced during the presidency of Evo Morales (2006-2019), the country’s first president to claim an Indigenous identity. These years were characterized by profound divisions between the Bolivian highlands, home to Morales’s base of support, and the opposition based in the lowlands department of Santa Cruz. This qualitative study takes an interdisciplinary approach to social identity and social difference during the Morales era, drawing on concepts from linguistic anthropology, literary criticism, and humor studies, and tracing connections between Neo/Los Mismos and …

An Evaluation Of The Equitable Practices For Stem Education To Prepare All Students For The 21st Century, Elizabeth Simpson

Dissertations

We are almost a quarter of the way through the 21st Century, yet most education institutions do not provide STEM education for all students. Science, technology, engineering, and math (STEM) have been a special focus of both industry and federal education initiatives in recent years. STEM is a proven way of building student skills needed for the workforce of tomorrow. The purpose of this study is to determine why education decision-makers resist implementing STEM programs equitably for all students. The context of this inquiry is district and school-based leaders throughout the United States, from elementary to high school, who have …

An Evaluation Of The Elements Needed In A New Teacher Induction Program To Prepare And Retain Second Career Educators, Bianka Newkirk

Dissertations

According to García and Weiss (2019), the United States faces a critical teacher shortage. There are not enough students majoring in or graduating with degrees in education. A solution to the teacher shortage is to fill the vacancies by recruiting and training secondcareer educators. If teachers are trained and mentored during the early stages of their careers, students will reap the benefits. Teachers who participate in a comprehensive new teacher induction program remain in the teaching profession longer and have tremendous success in terms of student achievement. Through my study, I aimed to research the elements needed in a new …

My Legacy Document: A Story Told Through A Pedagogical Lens Of Three Landscapes. School, Work, And Faith, Debra Williams

Dissertations

Too often professionals, when answering the question “Who are you?”, resort to listing what they do. Although individuals are gifted, experienced, and qualified, as these persons influence and significantly impact others, one could get lost as a person and be unfulfilled. That’s a problem.

Positioning myself as the study of research, utilizing autoethnography as the chosen methodology, my doctoral journey is chronicled. Three landscapes, school, work, and faith, serve as the areas of emphasis.

Unlocking Potential: Analyzing The Impact Of Special Education Services On The Assessment Outcomes Of Students With Learning Disabilities, Kaitlyn Billops

Dissertations

Since the enactment of the Individuals with Disabilities Education Act (IDEA) in 2004, there has been a notable increase in the enrollment of students receiving special education services (National Center for Education Statistics [NCES], 2022). However, despite advancements in special education programming and service delivery, academic performance for students with disabilities still falls behind their general education peers, particularly on state summative assessments (Aron & Loprest, 2012). Disparities in academic achievement on these assessments can be attributed to various factors, including assessment practices, students' comfort levels during testing, and the severity of their disabilities. Assessing the efficacy of special education …

A Case Study Of The Organizational System Of Articulation At A Midwestern Regional Public University, Katherine J. Giardello

Dissertations

Quantitative research has long shown lagging community college transfer student completion rates, in addition to excess credits earned and lengthened time-to-degree for transfer students that do earn a bachelor’s degree (Horn & Skomsvold, 2011; Jenkins & Fink, 2016; Simone, 2014; U.S. GAO, 2017). Scant qualitative studies exist related to student transfer, particularly the academic enterprise of articulation and the university perspective on transfer.

This qualitative study takes up the cause, using organizational and systems theories (Birnbaum, 1988; Clark, 1983; Cohen & March, 1974; Morgan, 2006; Senge, 1990; von Bertalanffy, 1972; Weick, 1976) to frame a single site case study with …

Friction Stir Welding Of Tube-To-Tubesheet And Spot Joints For Virgin And Recycled Thermoplastic Materials, Syed Haris Iftikhar

Dissertations

Thermoplastic materials are becoming popular, due to their chemically inert and anti-fouling properties, for use in industrial heat exchanger applications involving heating/cooling of highly reactive fluids like acids. A novel non-conventional joining framework, based on the Friction Stir Welding (FSW) technique, is developed to create high-quality thermoplastic Tube-to-Tubesheet Joints (TTJs). The proposed technique has applications in the thermoplastic shell-and-tube heat exchanger and piping industries (as flange-to-pipe joints). The primary objective is to study the feasibility of the FSW technique for developing thermoplastic TTJs, followed by optimization of the process parameters and detailed material characterizations. This work used workpieces (tube, tubesheet) …

Cybersecurity Education And Continuous Learning Towards Uae Ncsp Fulfilment, Saleh Hamad Aldaajeh

Dissertations

This dissertation delves into enhancing cybersecurity education by aligning academic curricula with national cybersecurity strategic plan (NCSP) objectives, emphasizing the crucial role of Higher Education Institutions (HEIs) in developing a skilled cybersecurity workforce. Analyzing ten NCSPs, it identifies strategic themes and gaps between national goals and HEI offerings. The study reviews NCSP guidelines, international cybersecurity indices, and literature, including the NICE-NIST framework, to develop a framework that bridges the educational gap, improving learning outcomes and arming students with vital skills, knowledge, and competencies. Furthermore, it introduces a platform for continuous cybersecurity learning, employing micro-credentials, blockchain technology, and AI-driven systems. Based …

ﻣﺪى ﻛﻔﺎﯾﺔ ﺿﻤﺎﻧﺎت اﻻﺳﺘﺜﻤﺎر اﻷﺟﻨﺒﻲ اﻟﻤﺒﺎﺷﺮ - دراﺳﺔٌ ﺗﺤﻠﯿﻠﯿﺔٌ وَ ﻓﻘًﺎ ﻷﺣﻜﺎم اﻟﻘﺎﻧﻮن اﻻﺗﺤﺎدي رﻗﻢ (32) ﻟﺴﻨﺔ 2021, Mohammed Ibrahim Almemari

Dissertations

The Adequacy of Foreign Direct Investment Guarantees Analytical Study in Accordance with the Provisions of Federal Law No. (32) of 2021

The great economic competition between countries, and their endeavor to strengthen their economy through various fields; Make them compete with each other in attracting foreign direct investments to their territories; However, these investments cannot move from their home country to another country without having economic advantages and incentives that encourage them to invest in a country other than the home country. Likewise, these investments cannot carry out their work in any country without having The investor has many guarantees …

Synthesis And Structure-Property Relationships Of Sustainable Nanostructured Materials Towards Energy And Environment Applications, Nizamudeen Cherupurakal

Dissertations

This doctoral research aims to advance clean energy technologies by developing specialized nanostructured materials. The study covers significant research themes, each forming separate sections in the thesis, explaining the important role of nanostructures in enhancing the efficiency and sustainability of energy devices and photocatalytic technologies.

The enduring effort toward stabilizing and improving the efficiency of Dye-Sensitized Solar Cells (DSSCs) has stirred the solar research community to follow innovative approaches. The primary objective of the research is centered on electrode materials design, which improves photoanodes' Light-Harvesting Efficiency (LHE). To improve the Photoanode of DSSCs, a Metal-Organic Framework (MOF) derived porous photoanodes …

Enhancing Health Analytics: Secure And Private Federated Learning Solutions, Nisha Thorakkattu Madathil

Dissertations

Federated Learning (FL) is a collaborative method allowing individuals to train a model jointly without sharing their local datasets. It utilizes decentralized data sources to protect privacy, making it particularly promising in medical contexts where data confidentiality is paramount. FL facilitates the use of diverse datasets from various healthcare organizations while upholding patient confidentiality. It also plays a crucial role in advancing medical research and healthcare services while adhering to data distribution and compliance requirements. The primary challenges within federated healthcare encompass privacy preservation among sensitive distributed data, ensuring efficient communication, addressing data heterogeneity, and ultimately guaranteeing model accuracy. To …

اﻷﻣﺒﻮدﺳﻤﺎن ﻛﺂﻟﯿﺔ ﻧﺤﻮ ﺗﻌﺰﯾﺰ ﺛﻘﺔ اﻟﻤﺘﻌﺎﻣﻠﯿﻦ بجهة اﻹدارة ﻓﻲ دوﻟﺔ اﻹﻣﺎرات اﻟﻌﺮﺑﯿﺔ اﻟﻤﺘﺤﺪة, ﻋﺒﺪاﻟﺤﻤﯿﺪ أﺣﻤﺪ اﻟﻮاﺣﺪي

Dissertations

The Ombudsman Serves as a Mechanism to Enhance Trust in Administrative Entities in the United Arab Emirates

In the midst of governments’ trend towards re-evaluating the relationship with customers by building a partnership relationship between them to achieve common and diverse interests at the legal, administrative, social and economic levels, the researcher sought to find mechanisms that would enhance trust between the government and customers to find alternative solutions to address customer’s complaints and disputes arising from administrative work.

Therefore, the choice fell on the experience of the State of Sweden in establishing the Ombudsman system, which aims to protect …

Graphene 2d Heterostructures For Thz Applications, Omnia Samy Shaaban

Dissertations

THz technology is a promising field that has various applications in communication, medical imaging and diseases’ detection, scanning, and the food industry. Since THz technology is still in its early stages, there is a lot of work to be done to obtain devices that work efficiently in the THz range. One of these devices is THz absorbers that are the basic building blocks for the next generation THz systems whether in communication systems, imaging or shielding. THz absorbers are structures that can absorb electromagnetic waves in the THz range (0.1-10 THz). THz absorbers can be wideband (absorb a wide range …

The Impact Of Changing The Admission Policy On Students’ Educational Opportunities In Abu Dhabi Higher Educational Institutions, Maha Khalifa Al Mansoori

Dissertations

This dissertation is concerned with the intricate dynamics of educational change in the UAE, particularly focusing on the impact of admission policy changes on students’ educational opportunities on higher educational institutions. The main objective of this dissertation is to critically evaluate the effectiveness of educational changes, specifically through the lens of revised admission policy, in enhancing the standards of higher education in the United Arab Emirates.
/="/">A quantitative research methodology using questionnaire was utilized in this research paper and PLS-SEM method with SmartPLS software was used for data analysis. The study investigates the effect of changing the admission policy …

Enhancement Of Rainfall Prediction And Satellite Precipitation Estimates: A Machine Learning Approach For United Arab Emirates, Faisal Baig

Dissertations

The accurate estimation of rainfall in arid regions presents a significant challenge due to sparse ground observations and complex atmospheric dynamics. This dissertation investigates various aspects of rainfall estimation and prediction in the United Arab Emirates (UAE), employing Satellite Precipitation Products (SPPs) and Machine Learning (ML) techniques. The research is structured around four key articles, each addressing different facets of the overarching theme. The first publication examines rainfall variability, consistency, and concentration in the UAE by comparing satellite precipitation products with rain gauge observations, highlighting the discrepancies between the two data sources. The second publication evaluates the performance of precipitation …

School Leadership For The Practice Of Inclusive Education In Elementary Schools In The United Arab Emirates, Aysha Saeed Al Nuaimi

Dissertations

The number of students with disabilities in regular classrooms is increasing. In 2020, the United Arab Emirates (UAE) introduced a new policy with the goal of promoting inclusive education in all public schools. Although the UAE government is committed to the education of children with disabilities, the role of school leaders is vital to the successful implementation of inclusive education in schools. While school leaders have been found to be the main agents in steering inclusive practices, their contribution to practices in schools in the UAE context remains empirically unresearched. The objective of this study was to explore elementary school …

Valorization Of The Polymeric Constituents In Plastic Wastes Through Thermo-Chemical Processes By Using Viable Metal Oxides Additives, Labeeb Hamad Ali

Dissertations

The rapid accumulation of different types of plastic waste necessitates the development of effective and economically viable waste management operations. Such a process should ideally not only mitigate associated environmental burdens but also recycle and recover value-added products. Through incineration or pyrolysis, thermal processing has emerged as a mainstream approach to waste management of the ever-increasing loads of different categorized plastic wastes. Throughout the work of the thesis, we have utilized a multitude of complementary techniques spanning material characterizations, catalysis, kinetic modelling, and density functional theory (DFT) to comprehend the complex chemistry that underpins catalytic chemical recycling of plastic wastes. …

How Transformational Leadership Improves Instructional Practices: The Mediating Role Of Teachers’ Change-Oriented Organizational Citizenship And Appreciation, Mariam Mohamed Alhammadi

Dissertations

Enhancing educational outcomes in the education system of the United Arab Emirates (UAE) hinges on improving teaching and learning practices. This study investigates the influence of transformational leadership approaches on instructional practices within science classrooms while examining the potential mediating effects of enhanced change-oriented organizational citizenship behaviors and heightened organizational appreciation, in the cultural context of the UAE public school system. Data are gathered from 297 teachers in UAE government schools through survey instruments featuring modified existing organizational context scales and scales inspired by the PISA, 2015 cycle’s teacher and student questionnaires. The collected data are analyzed using SmartPLS software …

Transforming Fermentation Residues From Date Fruit Pomace For The Synthesis Of Bioadsorbent Material In An Integrated Biorefinery Framework, Sabeera Haris

Dissertations

In the pursuit of enhanced waste management solutions, this comprehensive research delves into the untapped potential of Date Fruit Pomace (DFP), an abundant byproduct from the date syrup industry that is currently underutilized, leading to environmental concerns. The study emphasizes the need for proper waste management and valorization strategies to mitigate the environmental impact of DFP and promote sustainability within the date processing industry. The initial phase involves characterizing DFP from Emirati varieties, highlighting its compositional and functional properties. The analysis reveals that DFP is rich in total dietary fiber (45.5%), residual sugars (35.3%), protein (10.6%), ash (4.1%), and fat …

Formate Dehydrogenase Immobilized On Metal Organic Framework For Enhanced Conversion Of Co2 To Formate, Shadeera Rouf

Dissertations

Enzymatic hydrogenation of carbon dioxide (CO₂) to formate by formate dehydrogenase (FDH) is a promising technology for reducing CO₂ concentrations in an environmentally friendly manner. For practical and economical implementation of the process, however, enhanced reusability of the enzyme is essential, which requires easy separation from the reaction mixture, coupled with sustained stability. One way to achieve this is by using the enzyme in an immobilized form. In this work, the effectiveness of using different metal organic frameworks (MOFs) as promising alternative supports for FDH immobilization has been assessed. A highly stable zirconium-based MOF, UiO66 and its …

Policymaker's Perspectives And Student Experiences Of Bullying At Schools In The Uae: A Mixed-Method Approach, Alfan Saghayir Alketbi

Dissertations

Bullying is a significant issue in schools worldwide, including Abu Dhabi, the UAE. This dissertation aims to explore the dynamics of school bullying and improve anti-bullying interventions through a mixed-method approach. The primary goal is to investigate current anti-bullying efforts in the UAE and develop a comprehensive framework for school-based bullying intervention, considering policymaker perspectives and student experiences.

The study includes a systematic scoping review, qualitative studies with policymakers, a SWOT analysis of Abu Dhabi's anti-bullying approaches, and a cross-sectional survey of students' perceptions, attitudes, and awareness in Al-Ain City. These methods provide an integrated view of bullying in the …