Digital Commons Network^™

Star Apple Blue And Avocado Green By Paulette A. Ramsay, Warrick Lattibeaudiere

PALARA: Publication of the Afro-Latin/American Research Association

No abstract provided.

Analysis Of Laminated Curved Beam With And Without Defects And Imperfections, Wei-Tsen Lu

Mechanical and Aerospace Engineering Dissertations - Archive

Several studies have focused on the modeling and response characterization of composite structural members, with particular emphasis on composite curved beams. The class of curved beam is explored to determine mechanical response in primary aerospace structural applications. The present work focuses on developing analytical closed-form solutions for investigating composite curved beams with and without fiber waviness and delamination. The present work can efficiently characterize the structural behavior of composite curved beams under bending. This work shows the development of a novel mathematical approach to predict structural performance by investigating axial stiffness, bending stiffness with consideration of shear deformation in composite …

Electrowetting-On-Dielectric (Ewod) Digital Microfluidic Device For Synthetic Organic Chemistry, Matin Torabinia

Mechanical and Aerospace Engineering Dissertations - Archive

Over the past decades, microscale chemical reaction technology has been attractive in diverse areas of chemistry. It allows the precise control of quantified reagents and highly efficient heat and mass transfer, because of a large interface-to-volume ratio–particularly in case of the exothermic reaction and mixing–, reduced consumption of toxic or expensive agents, improved reaction profiles, and enhanced selectivity compared to macro-scale reactions. The mainstream microscale reaction processes were established using continuous microchannel flow systems, which has emerged as a powerful complement to batch chemistry on the laboratory scale due to relative advantages, some of which include: increased safety, more accurate …

An Implementation Of The Regularized Extended Finite Element Method In Abaqus, Yu-Jui Liang

Mechanical and Aerospace Engineering Dissertations - Archive

The Regularized eXtended Finite Element Method (Rx-FEM) methodology is a discrete damage modeling (DDM) technique, which represents an approach to the progressive damage analysis (PDA) in laminated composites when multiple damage events such as matrix cracks and delamination are introduced into the model via the displacement discontinuities. In the Rx-FEM, the Heaviside step function that is typically used to introduce a displacement discontinuity across a crack surface in the eXtended Finite Element Method (x-FEM) is replaced by a continuous function approximated by using the finite element (FE) shape functions. This regularization offers unique possibility for the implementation of the Rx-FEM …

African American Women's Resistance In The Aftermath Of Lynching, Lacey A. Brown-Bernal

History Theses - Archive

This thesis focuses on resistance strategies used by African American women in the aftermath of lynching in the late nineteenth and early twentieth centuries. It examines the ways in which those strategies were shared, modified, and deployed by black women activists throughout the Jim Crow Era and traces the connection to contemporary movements for social justice. The starting point for this study of generational change within African American women’s resistance to violence is the transatlantic anti-lynching campaign of Ida B. Wells and an examination of newspaper articles that detailed her actions while abroad with an eye to considering how her …

Afro-Latin American Documentary Resistance From The Pacific Coast: How Voces De Resistencia (2017) Changes The Landscapes Of Aesthetics, Academia/Community Collaboration, And Black Feminist Activism During The Colombian "Peace Process", Sarah Ohmer

PALARA: Publication of the Afro-Latin/American Research Association

Voces de Resistencia, Capítulo 1, is a short documentary film with an original soundtrack composed and performed by Black Colombian female folk a cappella chorus, or alabadoras. The multimedia product makes use of Black feminist pedagogy and resistance: it portrays a silenced and oppressed group in Bojayá, Colombia. The focus on alabadoras singers and composers promotes self-definition and exposes the power of self-determination in songwriting, an a cappella chorus performance, and documentary filmmaking.

Advances In Liquid Chromatography And Liquid Chromatography- Mass Spectrometry For The Chiral Analysis Of Amino Acids And Differentiation Of Isomeric Amino Acid Residues In Peptides/Proteins From Complex Matrices, Siqi Du

Chemistry & Biochemistry Dissertations - Archive

Amino acids are essential building blocks in all living organisms. Initially it was believed that only L-amino acids were relevant in higher organisms, and D-amino acids were laboratory artifacts. Today, various D-amino acids have been detected in different organisms, including humans, and some even play essential roles in biological processes. In addition, abnormal D-amino acid levels have been reported in patients with different diseases. The variations in D-amino acid levels might be of some diagnostic value. However, our knowledge of D-amino acids remains limited and most of the D-amino acids are not well investigated due to the lack of a …

Direct Functionalization Of Inert C-H And C=C Bonds Using Copper And Zinc Catalysts Supported By Fluorinated Ligands, And The Chemistry Of Fe(Co)5 And Its Analogs With Coinage Metal Ions, Tharun Teja Ponduru

Chemistry & Biochemistry Dissertations - Archive

Transition-metal catalyzed direct functionalization of inert C-H and C=C bonds through nitrene- and oxo-transfer reactions are powerful and attractive synthetic strategies for constructing C-N and C-O bonds (e.g. found in amines, aziridines, alcohols, and carbonyl compounds) directly from hydrocarbon feedstocks, and have significant synthetic potential in chemical processes leading to natural products, pharmaceuticals and biologically active molecules. Chapters 2 and 3 of this work mainly focus on nitrene- and oxo-insertion chemistry catalyzed by transition metal complexes. We employed different types of fluorinated ligands to support copper and zinc metal centers. Therefore, complexes [HB(3,5-(CF3)2Pz)3]Cu(NCMe), [H2B(3,5-(CF3)2Pz)2]Cu(NCMe), [H2B(3,5-(CF3)2-4-(NO2)Pz)2]Cu(NCMe), [{(3,5-(CF3)2Pz)ZnEt}2(μ-THF)], [{(3-(CF3),5-(t-Bu)Pz)ZnEt}2(μ-THF)], [{(3,5-(i-Pr)2Pz)ZnEt}2(μ-THF)], [N{(CF3)C(C6F5)N}2]CuNCCH3, and …

Systematic Approach To On-Line Supercritical Fluid Extraction – Supercritical Fluid Chromatography – Tandem Mass Spectrometry Method Development, Alison Paige Wicker

Chemistry & Biochemistry Dissertations - Archive

Coupling supercritical fluid extraction (SFE) on-line with supercritical fluid chromatography (SFC) – tandem mass spectrometry (MS/MS) provides a platform for extraction, separation, and detection in a single analysis. Utilization of this technique simplifies sample preparation while limiting sample loss and/or contamination and significantly decreases total analysis time. SFE-SFC-MS/MS requires consideration of many extraction and chromatographic variables to not only provide the most efficient extraction, but to analytically transfer the extracted analytes to the column for separation. There is a fundamental lack of understanding of how the variables in SFE affect those in SFC. In the first study, on-line SFE-SFC-MS/MS was …

High Confidence Identification Of Cross-Linked Peptides By Mass Spectrometry Cleavable Cross-Linking Technologies, Jayanta Kishor Chakrabarty

Chemistry & Biochemistry Dissertations - Archive

Mass spectrometry (MS)-based chemical cross-linking technique is a potential tool for understanding the protein structure and protein-protein interactions. However, low abundances of cross-linked products and the data complexity are the major challenges in this field. New strategies are required to pinpoint cross-linked peptides with high confidence. Our lab designed and synthesized a novel cross-linker with two differential MS-cleavable bonds, namely DUCCT. DUCCT-cross-linked peptide generates different diagnostic fragment ions in Collision Induced Dissociation (CID) and Electron Transfer Dissociation (ETD) (tandem mass spectrometric technique) which helps in the unambiguous identification of cross-linked peptide. We demonstrate the efficiency of DUCCT technology with model …

A Critical State Approach To The Mechanical Behavior Of Early-Age Cemented Paste Backfill, Amin B. Ghorbanpour

Civil Engineering Dissertations - Archive

Low plasticity to non-plastic mine tailings are typically transported to a storage area through pipelines in form of slurry or thickened tailings. The main concern with such tailings deposits is the possibility of liquefaction and the consequent failure of the tailings retaining dams. Tailings can also be used as Cemented Paste Backfill (CPB) material to fill previously mined underground voids. The state of practice to improve the mechanical properties of tailings is to add a small quantity of cementitious materials or binder agents. Portland cement (PC) is the most common binder agent that is used to improve the mechanical properties …

Sub-Synchronous Resonance Analysis And Detection, Igor Brandao Machado Matsuo

Electrical Engineering Dissertations - Archive

With the increasing penetration of renewable generation resources, power grids have become more susceptible to sub-synchronous resonance phenomena, especially to sub-synchronous control interaction, which produces fast-growing oscillations. The power system operation requirements for a reliable, fast and accurate detection and monitoring system for protection and mitigation purposes are increasing. Besides, risk assessment analysis during grid planning and update studies can be extremely time-consuming due to a large number of possible grid configurations and small time-steps required for the simulation of detailed electromagnetic transient (EMT) models. The first part of this dissertation aims to provide an optimized tool for SSR risk …

Flexible Ph Sensor For Smart Sensing, Khengdauliu Chawang

Electrical Engineering Theses - Archive

pH level of biofluid is crucial in understanding physiological health. Commercial glass electrode pH sensors are bulky and cannot provide real time data. In this study, a novel miniature pH sensor capable of continuous wireless communication was developed, which is a promising technology for providing point-of-care diagnosis. Iridium Oxide because of its wide pH sensing range and biocompatibility has attracted attention from biomedical and food industries; high sensitivity of Iridium Oxide based sensor is attributed to its high charge density. Flexible polyamide Kapton substrate (127 µm) is taken as base substrate and E-Beam method is employed to deposit adhesion and …

Using Property-Based Testing, Weighted Grammar-Based Generators, And A Consensus Oracle To Test Browser Rendering Engines And To Reproduce Minimized Versions Of Existing Test Cases, Joel David Martin

Computer Science and Engineering Dissertations - Archive

Verifying that a web browser rendering engine correctly renders all valid web pages is challenging due to the size of the input space (valid web pages), the difficulty of determining correct rendering for any given web page (the test oracle problem), and the degree to which normal variation in browser rendering behavior can obscure other differences (fonts, bor- ders, input controls, etc). These challenges lead to manual human involvement during the testing process. We propose a new Property-Based Testing (PBT) approach that addresses these challenges in order to enable automated web browser render testing. Our approach is composed of the …

A Mathematical Analysis Of A Model Of Drug Action On Intracellular Calcium Dynamics, Marah Townzen Funk

2019 Fall Honors Capstone Projects - Archive

The dysregulation of intracellular Ca2+ dynamics is a hallmark feature of several types of cancer. Administering a combination of a drug that blocks store-operated Ca2+ entry and a drug that inhibits tyrosine kinases is a novel chemotherapeutic approach currently being explored. Using data from experimental trials of these drugs, an existing model of Ca2+ dynamics was modified via the Michaelis-Menten theory of enzyme kinetics to reflect the behavior of the cell upon administration of the drugs. Mathematical analyses were performed to determine the overall repercussions of this modification. This included sensitivity analysis to reveal the model's sensitivity to changes to …

Physical Educators And Awareness Of Impact: Weight Biases By Gender And Implications On The Well-Being Of Students, Aria Green

2019 Fall Honors Capstone Projects - Archive

Educators are considered primary socializers for children, meaning they have a significant impact on behavioral, academic and interpersonal development. Physical educators, particularly male educators, have been found to express persistent biases against students who appear or are labeled overweight. These shown biases can negatively affect child development; if educators are aware of their impacts, these negative effects could be prevented. This study looked for evidence on the relationship between influential awareness, expressed weight biases and gender of physical educators. Physical educators were asked to fill out a survey which included an influence awareness scale, demographics, personality measures and then reviewed …

Creative Project In Storytelling: A Perspective Exploration Of Digital Design, Animation, And Virtual Reality, Vincent Williams Ii

2019 Fall Honors Capstone Projects - Archive

The impression of youth, their sense of identity and belonging are themes commonly discussed in relation to mass media and societal structures across the globe. Both the risk expectancy and the innovative potential of virtual reality was hypothesized through a number of creative studies. Initially, interviews with developers and local creatives were conducted to better established a common understanding of existing virtual technologies. Studies in narrative storytelling were then utilized to develop concepts, scripts, and a directorial vision for the fictional story “The Years Before.” A short proof of concept film that explores how creators may interact with near-future advancements …

The Case Of Jesse Washington Lesson & Resources, Elizabeth Barnes

K-12 Teacher African American History Research Grant Program 2019

Students will analyze the lynching of a young boy after his questionable conviction for the murder of a woman on a Waco cotton farm. His violent murder became the battle cry for the NAACP's campaign to usher in a national anti-lynching law.

Material Characterization And Fracture Prediction Of Fdm Printed Parts, Sanchita Sheth

Mechanical and Aerospace Engineering Theses - Archive

In order to take advantage of the design freedom that Additive Manufacturing offers, most applications require reliable material characterization. This can ensure that a design performs within its environment and life requirements. This work discusses two models. One investigates the raster angle dependency of stiffness properties and the other numerically predicts fracture in Fused Deposition Modeling (FDM) printed polymer parts. Pre-processing of FDM geometry was done in Abaqus CAE (SIMULIA TM). FEA and post-processing was done in BSAM, which is a damage prediction software developed for composites. BSAM uses a regularized extended finite element approach of Discrete Damage Modeling. In …

A Robust Controller Design For A Tailless Uav With Effective Control Allocation, Ethem Hakan Orhan

Mechanical and Aerospace Engineering Theses - Archive

Attempts to completely remove the tails from aircraft can be dated back to the early days of modern aviation. A number of stability and control problems arising from the unique characteristics of the configuration resulted in poor handling qualities and some dangerous flight characteristics in the early designs. Lately, this configuration is becoming widespread again and the current state-of-the-art of fly-by wire technology and modern control design techniques enable design of tailless aircraft which are safe to fly. In this thesis, a study on the application of modern robust control design techniques on a tailless UAV is presented. A nonlinear …

Final Project Report, Andrea Hicks, Sue Ahn, Kontar Wissam

CTEDD Final Project Reports - Archive

No abstract provided.

Final Project Report, Kristine Williams, Jeff Kramer

CTEDD Final Project Reports - Archive

No abstract provided.

Final Project Report, Zhaohua Wang

CTEDD Final Project Reports - Archive

No abstract provided.

Effect Of Chicken Manure On Methane Production From Msw In Lab Scale Anaerobic Reactors, Md Tauhidul Islam

Civil Engineering Theses - Archive

One of the major problems of urbanization is the production of a huge amount of Municipal Solid Waste. The cities and metropolitan areas are generating more and more solid waste and these wastes are filling up the landfill rapidly. Creating new landfills after a few years is not a solution as there is not much space in urban areas. Moreover, making the landfills far away from cities is not economically viable as longer hauling distance increases the cost. In this scenario, Bioreactor landfill is a viable solution to this problem. Bioreactor landfills can save a lot of space and it …

Sense Of Belonging And The Lived Experiences Of Students Of Color In A Racially Diverse Honors Program, Rebekah Joanna Chojnacki

Educational Leadership & Policy Studies Dissertations - Archive

This qualitative study fills a gap in the research the lived experiences of Students of Color in racially diverse honors programs by illuminating the experiences of 12 Students of Color enrolled in a racially diverse honors program. Enrollment in an honors program has been demonstrated to be beneficial to promoting a sense of belonging for college students. However, prior to this study, little research has been done on the experiences of Students of Color in an honors program that is racially diverse. Using sense of belonging for college students (Strayhorn, 2019) as a theoretical framework allowed for several themes to …

Library Connection, V7n1, Fall 2019, University Of Northern Iowa. Rod Library.

Library Connection

Contents:

--A Secret to Student Success
--A Day in the Life of a UNI Student
--Student Highlight: Lauren Smith
--History Beyond the Surface: UNI CultureLab

Updating The Building Code To Include Indoor Farming Operations, Clint Simpson

Journal of Food Law & Policy

Urban agricultural production has grown to be a critical tool in the battles for food security and sustainability. A common regulatory barrier to urban agricultural operations big and small has been ambiguity in land-use laws. Local governments are increasingly friendly toward community gardens, small greenhouse farming operations, farmers markets, and the like. Many have sought to lift regulatory restrictions and provide clarity in the law. However, while these efforts benefit a multitude of local food production efforts, they do little to address the regulatory ambiguities faced by commercial-scale, indoor farming operations, especially vertical farms. Particularly concerning to indoor vertical farms …

An Analysis Of Interventions For Chronically Absent Students In Grade 6-8 Within Middle Schools In Somerset, New Jersey, Nicholas Solomon

Seton Hall University Dissertations and Theses (ETDs)

The aim of this research was to find effective, efficient, and practical interventions that can help educators in Somerset, New Jersey support chronically absent students by facilitating their coming to school and being productive students.

This study explored the definition of chronic absenteeism, along with the impact chronic absenteeism has on education, economically disadvantaged students’ impact on chronic absenteeism, strategies to improve chronic absenteeism, and chronic absenteeism case studies that have been utilized in schools across the nation.

Interviews were conducted with educators in order to gain a clear understanding of their perceptions/beliefs regarding the impact educators can have on …

Possibilities And Constraints Of Fostering Deeper Study Abroad Experiences: The Lived Experiences Of 50 Years Of Us Students In Japan, Sarah R. Asada

Journal of Comparative & International Higher Education

Special Issue

Learning From Those Who Have Done It Before' - Peer To Peer Employability Coaching And Mentoring: A Case Study Of Bournemouth University In The Uk, Vianna Renaud

Journal of Comparative & International Higher Education

Special Issue