Digital Commons Network^™

Flexural Bending Test Of Topology Optimization Additively Manufactured Parts, Mohammed Afify

Theses and Dissertations

The aim of this work is to model, manufacture, and test an optimized Messerschmitt-BölkowBlohm beam using additive manufacturing. The implemented method is the Solid Isotropic Material with Penalization of a minimum compliance design. The Taubin smoothing technique was used to attenuate geometric noise and minimize the formation of overhanging angles and residual stresses due to the thermal activity of the selective laser melting process. The optimized model required examination and repair of local errors such as surface gaps, non-manifold vertices, and intersecting facets. A comparison between experimental and numerical results of the linear elastic regimes showed that the additively manufactured …

The Effects Of Impure Water Sources On The Early-Age Properties Of Calcium Sulfoaluminate Cements, Wendy Long

Theses and Dissertations

One of the benefits of calcium sulfoaluminate (CSA) cements is that these materials gain strength rapidly, where strength development is often measured in hours instead of days. This property makes these materials desirable for use in temporary, non-reinforced repairs of roadways, airfields, and navigable locks. The rapid repair of these infrastructure elements is critical to transporting supplies into regions devastated by disaster. In these austere environments, potable water may not be available in sufficient quantities to make vital repairs, and the use of impure water in the production of CSA cement-based concrete would be advantageous. However, the hydration products formed …

Numerical Modeling Of Compacted Fills Under Landing Mats Subjected To Aircraft Loads, Jeremiah Matthew Stache

Theses and Dissertations

Rutting failures are prominent in expedient airfields constructed with AM2 landing mats over soft existing subgrades. There are many issues that must be addressed when approaching this multiaceted problem. The load transfer mechanism occurring at interlocking mat joints and the mat-soil interface bonding condition affect near surface subgrade response. The repeated loading coupled with lateral aircraft wander causes significant principal stress rotation in the subgrade. This kneading action then causes variations in the excess pore-water pressure and a subsequent softening of the soil. The purpose of this study is to investigate the critical factors that lead to subgrade rutting failures …

Improving Discharge Medication Education On A Sepsis Unit: A Quality Improvement Project, Maria Noguez

Master's Projects and Capstones

Ineffective discharge education plays a role in increased readmission rates, adverse drug events, and worsened patient outcomes post-hospitalization. When combined, the resulting financial burden on America’s healthcare system is exorbitant, as is the physical and mental toll on unsuspecting patients. To close the current gaps in discharge teaching, this project is incorporating the teach-back method and utilizing updated medication handouts.

Starting on the sepsis unit of a large, local medical center – the Clinical Nurse Leader (CNL) interns employed assessment tools to identify areas for improvement. The data revealed rushed, incomprehensive discharge medication education and reflected in low HCAHPS scores …

Conceptualizing The Promise Of Life Skills Education For Adolescent Girls In The Global South: A Critical Discourse Analysis, Olivia Casey

Master's Theses

In recent years, international development organizations have increasingly championed life skills education as a crucial tool for empowering girls in the global South. However, while life skills education continues to gain momentum and popularity within the international development landscape, the heterogeneity of life skills interventions remains significant. In this study, I aimed to uncover how key global actors differently conceptualize life skills and the promises they are understood to hold for adolescent girls in the global South at the current moment. Utilizing the methodology of critical discourse analysis, I examined key documents on girls’ life skills education published by central …

Tennessee Consolidated Retirement System Comprehensive Annual Financial Report For The Fiscal Year Ended June 30, 2019, Tennessee. Department Of Treasury.

TCRS Financial Reports

No abstract provided.

Design Of Universal Control Load System Of Helicopter Flight Simulator, Chen Zhen, Haikuan Yang, Jiang Nan, Yuancheng Wang, Tianjiao Jiang

Journal of System Simulation

Abstract: To improve the universality and handling quality of control system of helicopter flight simulator, a universal control load system of helicopter flight simulator suitable for helicopter flight simulator is designed. The dynamic feedback model is proposed to solve the contradiction between control rigidity and stability, control precision and response frequency, the control rigidity and kinematic accuracy are improved.The operating load mechanism is designed, the system structure and drive system are simplified, the smoothness of force perception is improved; the third order smoothing algorithm and fieldbus technology based on EtherCAT are applied to improve the anti-jamming capability and response speed, …

Microscopic Simulation Based Evaluation Of Congestion Pricing For Beijing Urban Area, Jingchen Dai, Ruimin Li

Journal of System Simulation

Abstract: In order to study the potential effect of congestion charging policy in large-scale road network, a micro-simulation platform Paramics is used to establish a simulation model within Beijing fourth ring road. On this basis, multiple congestion pricing scenarios are assessed in consideration of charging zones size, charging rate, and travel mode shift. When the travel mode shift is put aside, the analysis shows that selecting a larger charging zone is more effective on reducing vehicle kilometers of travel and may increase the total charge revenue. However, congestion pricing appears no potential to significantly affect the average speed of …

Fieldbridge Assocs. Llc V. Ishibashi

All Decisions

No abstract provided.

350 Cent. Park W. Assoc., Llc V. Udo

All Decisions

No abstract provided.

Postharvest Heat Treatments To Inhibit Penicillium Digitatum Growth And Maintain Quality Of Mandarin (Citrus Reticulata Blanco), Diana B. Queb-Gonzalez, Aurelio Lopez-Malo, María E. Sosa-Morales, Rossana Villa-Rojas

Department of Food Science and Technology: Faculty Publications

Use of fungicides is a common practice as a postharvest treatment to control fruit decay. Nowadays, environment-friendly technologies, such as heat treatments, are viable replacements. This study evaluated the effects of post-harvest heat treatments (traditional and microwave-assisted) on mandarins intentionally inoculated with Penicillium digitatum. For the studied heat treatments, the target temperature was 50C, which was held for 2.5 min. After heating, mandarins were cooled and stored at 25C for 13 days. MW treatments effectively prevented mold growth during storage, while HW only delayed it. Control mandarins (without treatment) showed the highest significant weight loss. Neither thermal treatment nor storage …

Maternal Immunity: Preimplantation Preparation And Spatial Distribution Of Ccl19, Ashleigh Elbert

Electronic Theses & Dissertations

Maternal Immunity: Preimplantation preparation and the role of CCL19

An Abstract of the thesis by

Ashleigh R. Elbert

The maternal uterus in mammals undergoes extensive remodeling in preparation for implantation of the semi-allogenic embryo. Activation of the T cell homing receptor, CCR7, regulates multiple aspects of adaptive immunity. Genetic deletion of CCR7 reduces T regulatory (T Reg) cell migration into mouse uteri and decreases embryo implantation. CCL19 and CCL21 are the sole ligands for CCR7. It is hypothesized that CCL19 expression could attract T reg cells into the pre-implantation uterus and provide local immune suppression prior to implantation. Sprague Dawley …

Toye V. State Appellant's Brief Dckt. 47344

Not Reported

No abstract provided.

Design And Implement Of Semi Physical Simulation System For Underwater Acoustic Imaging, Ruonan Fan, Jijun Jiang, Naiwei Sun

Journal of System Simulation

Abstract: A semi physical simulation system based on underwater scale target and acoustic imaging is designed. Functional requirements are presented, the echo models of underwater scale target acoustic image are established through the planar element method, the structure, hardware and software are designed, the real-time signal generation techniques of applying the model to the simulation system are researched. The results of underwater experiment show that the simulation system can simulate the acoustic imaging echo signal of Benchmark submarine model, the imaging results are recognizable to some extent, it can be promoted to any underwater scale target and meet the …

Reducing Vascular Access Complications Through Precise Cannulation Plan Implementation, Rosemarie Quicho

Master's Projects and Capstones

Abstract

Aneurysm, which is the dilatation of the arteriovenous fistula (AVF), and pseudo-aneurysm, which is caused by leaking of blood outside the arteriovenous graft (AVG), pose a threat to the vascular access (VA) and the patient (Mudoni et al., 2015). Uneven vein penetration by dialysis needles and subsequent skin scarring lead to the development of inflammatory changes in the VA area. Scab formation masks the signs of ongoing inflammation. Damage to and tearing of the scab can then lead to lethal exsanguination from the VA (Handlos, Marecová, Smatanová, Dvořáček, & Dobiáš, 2018). Dialysis staff members are trained to use the …

Culturally Responsive Pedagogy And Its Relevance In The Adult English As A Second Language Classroom, Helena Henkin

Master's Projects and Capstones

There is an increasing demand for adult English as a Second Language teachers who are qualified to meet the needs of culturally and ethnically diverse students. Cultural dissonance between the students’ cultures and instructional practices and curriculum leads to high drop-out rates and poor instructional outcomes. This Field Project proposes that Culturally Responsive Pedagogy is an important tool to improve the learning outcomes of culturally and ethnically diverse adult English as a Second Language students. This Field Project discusses the theoretical components of Culturally Responsive Teaching. The notion of Culturally Responsive Teaching is premised on the idea that using students’ …

The Diamond, December 13, 2019, Dordt University

Dordt Diamond

• Front Page: One Expensive Longboard Ride; Trump Impeachment Inquiry Timeline; Beyond a Prank: East Hall Feels Effects of Policy Violations
• Opinion: "Dordtspeak" Trumps Biblical Teaching?; A Thankful State of Mind; A Whole New World Awaits: The Advent of Disney Plus; Seven Tips for Surviving Your First Winter
• News: Rhinos Face Extinction as Christians Face Facts
• Arts & Entertainment: The Making of Airwaves; The Irishman: Long but Worth It; For the First Time in Forever... or Since 2013; Wind Symphony Prepares for Christmas; Knives Out: A Twist of a Mystery; Service of Lessons and Carols
• Sports: Dordt Men's Basketball Shows Confidence …

Multiple Mitochondrial Thioesterases Have Distinct Tissue And Substrate Specificity And Coa Regulation, Suggesting Unique Functional Roles., Carmen Bekeova, Lauren Anderson-Pullinger, Kevin Boye, Felix Boos, Yana Sharpadskaya, Johannes M Herrmann, Erin L. Seifert

Department of Pathology, Anatomy, and Cell Biology Faculty Papers

Acyl-CoA thioesterases (Acots) hydrolyze fatty acyl-CoA esters. Acots in the mitochondrial matrix are poised to mitigate β-oxidation overload and maintain CoA availability. Several Acots associate with mitochondria, but whether they all localize to the matrix, are redundant, or have different roles is unresolved. Here, we compared the suborganellar localization, activity, expression, and regulation among mitochondrial Acots (Acot2, -7, -9, and -13) in mitochondria from multiple mouse tissues and from a model of Acot2 depletion. Acot7, -9, and -13 localized to the matrix, joining Acot2 that was previously shown to localize there. Mitochondria from heart, skeletal muscle, brown adipose tissue, and …

Don't Fear The Nobodies: A Critical Youth Study Of The Columbiner Instagram Community, Brianna L. Wright

Theses and Dissertations

This research sheds light on how one particular group of young people, Columbiners, use social media to build and maintain a sense of community. Through a content analysis of 200 Instagram posts containing a school shooting fandom hashtag, or #Columbiner, and drawing on both Critical Youth Studies and Sense of Community Theory, this research demonstrates how Columbiners use their hashtag to create a sense of community on Instagram, to explore what it means to be young and cool, and to make sense of the problems that shape their social world, including school shootings. Exploring how this particular group of young …

Family Firm Selection: A Relational Perspective, William Elliot Tabor

Theses and Dissertations

This study focuses on the hiring of nonfamily employees in family firms. Research to date has emphasized the challenges family firms confront in attracting and selecting quality nonfamily human capital. This literature has emphasized the limitations these firms face due to the information asymmetries common to the hiring process. However, this research has not considered the advantages available to family firms through their social network. Drawing on agency theory, I hypothesize that owner referral utilization mediates the relationship between family essence and firm performance because their use lessens the agency conflicts between owners and nonfamily members. Utilizing a sample of …

Characterization Of Fatty Acid Composition Of Bull Sperm With Varied Cryotolerance, Holly Evans

Theses and Dissertations

The objectives of this study were to determine fatty acid composition and acrosome status from bull sperm with different freezabilities (n = 12). We hypothesized that lipid fractions had differentiated fatty acid compositions and such differences influence sperm freezability and the sperm acrosome. Fatty acids were extracted from fresh frozen sperm and fractionated by solid-phase extraction. Thirtyour fatty acids were quantified. Saturated fatty acids were predominant, accounting for 71 to 80% of fatty acids in both fractions. Differences in composition between fractions existed (P < 0.001). Branched chain fatty acid concentrations (15 to 18 µg) were almost twice that of polyunsaturated fatty acid concentrations found in the polar fractions (8 to 9 µg; P < 0.001). Sperm with differentiated freezabilities had few differences in 22:0, 18:1 cis 9, and 14:0 13-methyl fatty acids (P ≤ 0.011). Analyses of acrosome status of sperm revealed that acrosomes were affected differently among bulls.

Development And Evaluation Of An Automated System To Deliver A Live-Attenuated Edwardsiella Ictaluri Vaccine In Commercial Catfish Production Systems, John Wesley Lowe

Theses and Dissertations

Catfish aquaculture is the largest cultured food fish industry in the United States, accounting for approximately $375 million in sales annually, with Mississippi leading the industry with 36,200 surface acres of production. However, infectious diseases such as enteric septicemia of catfish (ESC) are decreasing production efficiencies, creating losses of $40-60 million annually. Live-attenuated oral ESC vaccines are effective in preventing ESC infections, but have not been widely adopted by the catfish industry due to the lack of a system to administer the oral vaccine at the scale seen in commercial catfish production systems. An automated system was developed to administer …

Reply To “How Foot Voting Enhances Political Freedom”, James Allan

San Diego Law Review

My job is to comment briefly on Ilya Somin’s Article, How Foot Voting Enhances Political Freedom. Of necessity, then, I will be selective. The thrust of the Article—which appears to be an excerpt from an upcoming book—is that “ballot box voting” compares unfavorably to “foot voting.” The terms are Somin’s, not mine. The former phrase refers to what we would normally just call “voting.” The latter refers to what would normally fall under the aegis of migration, immigration, emigration, or even moving to another jurisdiction. And when we compare those two alternatives—voting in a democratic election and picking up one’s …

A Modular Open-Source Pre-Processing Tool For Finite Element Simulations Of Additive Manufacturing Processes, William Furr

Theses and Dissertations

Additive manufacturing has shown the ability to produce highly complex geometries that are not easily manufactured through traditional means. However, the implications of building these complex geometries regarding thermal history requires more attention. AM process simulations have proven to be computationally expensive and require large amounts of pre-processing to execute. This thesis will start with a review of additive manufacturing along with current modeling efforts. Then, the development of a pre-processing tool for finite element simulations of these processes is presented. It is shown that the pre-processing tool significantly decreases the total time-to-simulation by removing manual steps. Finally, a study …

Tensile Strength And Other Material Properties Of The Equine Suspensory Apparatus Of The Distal Phalanx And The Effect Of Specimen Size, Tensile Load Orientation, And Freezing On Determination Of The Material Properties, Benjamin E. Nabors

Theses and Dissertations

The suspensory apparatus of the distal phalanx (SADP) is an intricate adaptation of dermal and epidermal tissue that has a specialized role in the horse to absorb concussion while suspending the weight of the horse from within the hoof. The integrity of the hoof-bone connection is critical to the health of the horse and it can be affected by numerous disorders that cause it to fail. Accurate data on the ultimate tensile strength and other material properties of the SADP are important in modeling the behavior of the tissue under load and selecting appropriate prevention and treatment strategies for disorders …

The Impact Of A Freshman Orientation Program On Academic Achievement For Students Enrolled In A Community College, James Gray

Theses and Dissertations

The purpose of this quantitative study was to explore the effectiveness of a freshman orientation program on second-semester retention, second-year retention, and cumulative GPA for students enrolled in a community college in the Deep South. The problem addressed in this study is a lack of sufficient academic and social support for college students, limiting their ability to remain in school and with high levels of academic performance (Nora & Crisp, 2007). For this study, the following research questions were analyzed: (1) Are there differences in 1st to 2nd semester retention for program completers with a 17-18 ACT as compared to …

Predation Risk Of Double-Crested Cormorants (Phalacrocorax Auritus) On Commercial Catfish Production In The Mississippi Delta, Terrel Christie

Theses and Dissertations

Double-crested Cormorants (Phalacrocorax auritus) impact United States commercial aquaculture and are considered the greatest avian predators on catfish (Ictalurus spp.) aquaculture facilities in the Mississippi Delta. Recent changes in aquaculture practices, regulatory policies, and decreased overall hectares in production prompted this study that: 1) estimated abundance and distribution of cormorants at their night roosts using aerial surveys, 2) assessed cormorant consumption of catfish in relation to their night roost through cormorant collections and stomach contents analysis, and 3) updated a cormorant bioenergetics model with contemporary data to estimate catfish loss. Models estimated that 4.2 and 5 million cormorant forage days …

Exploring United Methodist Adults’ Racial Attitudes And Beliefs From A Critical Race Framework To Inform Outreach Efforts With Low-Income, Black Youth In Mississippi, Brittany Radford

Theses and Dissertations

Extensive literature has documented The United Methodist Church’s’ (UMC) commitment to social justice. A current focus in the church is working with economically marginalized populations, including the 231,170 Black children and youth in Mississippi. To better understand adults that serve this population, I conducted an exploratory study to gather baseline data about UMC adults’ contemporary attitudes and beliefs about race, racism, and discrimination. A cross-sectional survey was administered at the 2017 Mississippi Annual Conference of The UMC. Using a critical race lens, I found that most of the attendees espoused moderate color-blind racial attitudes and beliefs about the frequency that …

Investigating The Relationship Between Hormone Receptors Dax-1 And Estrogen Receptor Within Prostate Cancer Cell Lines, Meghana G. Vijayraghavan

Master's Theses

Prostate cancer (PCa) is estimated to be the second leading cause of cancer-related deaths among men in the United States in 2019. While most prostate tumors rely on androgens for growth signaling, there are subsets of tumors that become androgen-resistant, therefore resisting conventional androgen-depravation therapy. Consequently, research has focused on targeting different hormone receptors for novel therapeutics. One such receptor is Dosage-sensitive sex reversal, adrenal hypoplasia critical region, on chromosome X, gene 1 (DAX-1). DAX-1 is known to interact with other hormone receptors, such as androgen receptor (AR) and estrogen receptors (ERs) to suppress the proliferative effects …

They Dance To Bring Attention To A War. But Who’S Watching?, Fruhlein Chrys Econar

Capstones

Potri Ranka Manis Queano has been at the helm of Kinding Sindaw, the heritage dance troupe she founded, for the last 27 years. When a group of ISIS-affiliated local terrorists attacked Marawi City, the home of the Maranao people, it infused a sense of urgency into her group’s work.

http://www.fruhlein.com/kindingsindaw