Digital Commons Network^™

Effect Of Manufacturing-Induced Defects And Orientation On The Failure And Fracture Mechanism Of 3d Printed Structures, Amit Khatri

Mechanical and Aerospace Engineering Theses - Archive

Additive manufacturing is a rapidly growing cutting edge technology. Number of experimental studies have shown that strength of product manufactured by additive Fused Deposition Method (FDM) is influenced by different processing parameters involved during manufacturing. This thesis work presents experimental and theoretical investigation of mechanical behavior of ABS material fabricated with variation in some of process parameters such as Axis Orientations, Raster Orientation, Infill Percentage, Layer Height and Number of Shells. Different experiments were designed to understand the basics of 3D printing manufacturing and to characterize the mechanical behavior of 3D printed structures. This study helps to understand, how different …

Electromigration Induced Interface Reaction In Cu-Wire / Al-Pad Diffusion Couple, Patricia Aracelly Rodriguez-Salazar

Material Science and Engineering Dissertations - Archive

This dissertation presents experimental observations that may assist the understanding of electromigration (EM) failure mechanism active in Cu wire and Al thin film pad (wire bond). This study is motivated by an ongoing industrial effort to adapt Cu as wire bonding material for interconnection. Traditional material used for the wire bond has been Au; however, its high cost combined with its susceptibility to reliability failure caused by excessive growth of IMCs (IMC) makes Cu to be an attractive replacement. Though, since an application of Cu to wire bond technology is relatively new, many of reliability failure mechanisms are unknown especially …

A Harmonic Function Method For Eeg Source Reconstruction, Hongguang Xi

Mathematics Dissertations - Archive

Neuronal activities generate the electrical current in the brain, and further result in the potential changes over the scalp. Electroencephalography (EEG) is a technique used to record the potential changes on the scalp. Even though fMRI, PET, MEG and other brain-imaging tools are widely used in brain research, they are limited by low spatial/temporal resolution, cost, mobility and suitability for long-term monitoring. In contrast, EEG signals have been successfully used to obtain useful diagnostic information (neural oscillations and response times) in clinical contexts. Further, they present the advantage to be highly portable, inexpensive, and can be acquired at the bedside …

Study Of Parameters Impacting Productivity Of Tunnel Boring Machines, Hamed Hashem Pour

Civil Engineering Theses - Archive

Tunnel construction has been on the rise for transportation of humans, freight and fluids. For a successful tunneling project, it is necessary for that tunneling contractors to have sufficient data about scope of work, project features and characteristics of the ground to estimate advance rate of the a tunnel boring machine (TBM). The main objective of this thesis is to study tunneling case studies and literature to analyze TBM productivity based on ground conditions, diameter and length of each project. Project data was tabulated and results are reported in this thesis. The methodology to conduct this research was literature search …

Laboratory Evaluation Of Tx- Prochem As An Ionic Liquid Stabilizer, Esmat Tavakoli

Civil Engineering Theses - Archive

Chemical treatment of pavement and foundation soil was conducted to improve workability during compaction, to increase the strength and stiffness of a foundation layer, and to reduce potential shrink and swell due to moisture changes and/or frost action. In this study, a commercial liquid ionic stabilizer (Tx ProChem) was evaluated based on its effectiveness to reduce swell potential and improve the strength of Texas expansive clay. This study also evaluated selected, representative liquid chemical stabilizers’ effect on expansive clay soil. The research presented herein assesses how much the chemical treatments changed the relevant engineering properties of the test soil as …

Recipients Of Major Scientific Awards A Descriptive And Predictive Analysis, Andrew Calvin Barbee

Educational Leadership & Policy Studies Dissertations - Archive

Recent trends demonstrate an increase of women in leadership roles, STEM fields, and participating in higher education including graduate and doctoral programs, which is a result of Title IX. This quantitative study considered major scientific awards awarded to females and examines demographic characteristics of awardees from the Nobel, National Academy of Sciences (NAS), and National Science Foundation (NSF). More specifically, the following awards were examined the Nobel Prize in Chemistry, the NAS Public Welfare Medal, and the NSF National Medal of Science within the discipline of Physical Science. Also, this study focused on equality to determine if a fair playing …

A Design And Analysis Of Computer Experiments Approach For Green Building, Marjan Sayadi

Industrial, Manufacturing, and Systems Theses - Archive

The coming shortage of energy sources and critical environmental impacts are two major factors that have forced a change in product design processes. The shortage of energy sources is related to the limitation on non-renewable energy sources on earth and requires the development of new concepts with lower energy consumptions. Environmental impact, on the other hand, is concerned about the negative effects of products on the natural environment. In recent years, research on designing more environmentally-friendly products that consume lower of energy with lower environmental impact has been initiated to address these issues [1-3]. Designing new powertrains for vehicles [4] …

A Pilot Trial Of The Effectiveness Of Acceptance And Commitment Therapy Self-Help For Problematic Pornography Viewing, Scott Thane Heninger

Undergraduate Honors Capstone Projects

Although problematic pornography viewing (PV) is quite prevalent (Carroll et al., 2008), very few studies have been done to test treatments addressing this issue. Preliminary research indicates Acceptance and Commitment Therapy (ACT) is a promising potential treatment for problematic pornography viewing, but this has only been evaluated in face-to-face therapy trials to-date. This study sought to determine the effectiveness of a general ACT self-help book on PV. A sample of 19 participants were recruited and given a copy of the book with directions to read and apply its principles over the course of 8 weeks. Assessments were completed at baseline, …

Language Brokering Consequences As A Function Of Development, Brent M. Gage

Undergraduate Honors Capstone Projects

Language brokering can be defined as a child mediating linguistically for a parent or other adult figure, either in spoken or written communication. This situation is a common occurrence among migrant and refugee families as children tend to acquire a new language at an accelerated rate in comparison with adults. As the immigrant and refugee populations continue to grow in comparison with native groups within the United States, it is increasingly important to understand the phenomenon of child language brokering. Moreover, it is particularly relevant to understand how the expectations for and consequences of language brokering may help to shape …

Measuring The Effects Of High-Altitude Flight And Upper Atmospheric Radiation On Muscle Cells, Annelise Dykes

Undergraduate Honors Capstone Projects

There are several physiological barriers to long-term space travel, including the effects of launch, landing, and microgravity on muscle cells. A payload capsule was designed to maintain cell growth during a high altitude balloon flight to model some of these physiological processes. Murine muscle cells (strain C2C12) were cultured and launched in a capsule on a balloon satellite in November 2016. Cells were monitored for changes due to temperature, flight motion, radiation, and gravity differences by quantifying cell characteristics before and after the flight using physical measurements and cell viability. Instruments were selected to monitor flight data, and a payload …

Design For Manufacturability And Assembly Of An Assistive Technician Creeper, Including Single Drive Control Of A Multi-Degree Of Freedom Kinematic Mechanism, Larry T. Wilde Jr.

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In 2011, a team of engineering students at Utah State University designed and built an assistive technician creeper to assist persons with lower-extremity physical disabilities to work in low-clearance areas. In order to put this technology on the market, a complete product redesign was needed to address safety and functionality concerns. This thesis outlines the specific design needs, presents the detailed design approach, and summarizes the final creeper solution. The mechanisms of the initial prototype were modified to independently incline or recline the upper body, and raise or lower the seat surface with a single motor. This will be especially …

Computational Methods For The Analysis Of Functional 4d-Ct Chest Images., Ahmed Soliman Naeem Soliman

Electronic Theses and Dissertations

Medical imaging is an important emerging technology that has been intensively used in the last few decades for disease diagnosis and monitoring as well as for the assessment of treatment effectiveness. Medical images provide a very large amount of valuable information that is too huge to be exploited by radiologists and physicians. Therefore, the design of computer-aided diagnostic (CAD) system, which can be used as an assistive tool for the medical community, is of a great importance. This dissertation deals with the development of a complete CAD system for lung cancer patients, which remains the leading cause of cancer-related death …

Crime And Culture : A Thematic Reading Of Sherlock Holmes And His Adaptations., Britney Broyles

Electronic Theses and Dissertations

This dissertation focuses on the adaptation of Arthur Conan Doyle’s Sherlock Holmes character and stories into the television shows Sherlock and Elementary on air today. The project will consider three central questions: 1) Why is this Victorian detective hero still popular in the twenty-first century and what has remained constant and still resonates with modern audiences? 2) Both television shows transport Holmes in time by setting their narratives in the present day; therefore, what has been changed in this process of adaptation? 3) How do these changes represent shifts in our cultural thinking about important aspects of humanistic inquiry? The …

The African American Community In Ogden, Utah: Teaching Local History Within A National Framework, Michelle Braeden

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

Historical Background:

Beginning in 1869, the newly built Union Station in Ogden Utah became a major terminal for the transcontinental railroad. Around that same time George Pullman began recruiting emancipated slaves as employees on his luxury railroad cars. As a result a sizeable number of African Americans began working on the railroad. Many African Americans found residence in Ogden since it was a major railroad hub. As a result a small African American neighborhood that was six blocks long and two blocks wide formed in the city.[1] Businesses and organizations formed to support the emerging African American community within …

Optimization Models And Algorithms For Demand Response In Smart Grid., Guangyang Xu

Electronic Theses and Dissertations

For demand response in smart grid, a utility company wants to minimize total electricity cost and end users want to maximize their own utility. The latter is considered to consist of two parts in this research: electricity cost and convenience/comfort. We first develop a system optimal (SO) model and a user equilibrium (UE) model for the utility company and end users, respectively and compare the difference of the two. We consider users' possible preference on convenience over cost-saving under the real-time pricing in smart grid, and each user is assumed to have a preferred time window for using a particular …

Energy-Efficient Management Of Mechanical Ventilation And Relative Humidity In Hot-Humid Climates, Florida Solar Energy Center, Charles Withers, Jr.

FSEC Energy Research Center®

The U.S. Department of Energy's Building America research team Building America Partnership for Improved Residential Construction conducted this research project to gain data and insight into these issues. The project focused on energy-efficient management of mechanical ventilation and RH during the cooling season. It consisted of eight test configurations. A particular focus evaluated how well a ductless seasonal energy-efficiency ratio (SEER) 21.5 mini-split heat pump (MSHP) could perform as the primary cooling system without a dehumidifier for supplemental dehumidification in a continuously mechanically ventilated house.

Factorial Validity And Reliability Of Self-Regulation Learning Questionnaire Among Undergraduate Students At University Of Dammam In Saudi Arabia, Malek Jdaitawi

Journal of Educational and Psychological Studies

The aim of the study was to examine the factor structure of the short-version of the self-regulated learning questionnaire in a group of undergraduate students at the University of Dammam. Four factors were assumed to represent the self-regulation: concentration, time management, self-testing and study aids. Testing reliability and validity of the constructs was another aim of this study. The study sample comprised 209 students (89 females and 120 males). Stu- dent age ranged from 18-21 years. The scale had 32 items with eight items for each of the four subscales. The research examined the factorial validity and reliability for the …

Negative Impacts Of Cultural Globalization On Islamic Identity: A Regional Project On Hashemite University Students, Fawwaz Salman, Mohammad S. Alkhazalleh

Journal of Educational and Psychological Studies

This study aims at identifying the viewpoints of Hashemite University students re-garding the negative impacts of cultural globalization on Islamic identity. The sample (n = 403) was from undergraduate students of Hashemite University. The total number of undergraduate students of the university is 24000 students. The study was conducted during the second semes- ter of the academic year 2016. A researcher-made questionnaire with appropriate validity and reliability was used to collect data. The questionnaire was distributed to sample of students. The findings indicate that The Hashemite University students' viewpoints were moderate. Also, there are statistically significant differences attributed to sex …

Modeling Streambank Erosion On Composite Streambanks On A Watershed Scale, A. R. Mittelstet, D. E. Storm, G. A. Fox, P. M. Allen

Department of Agricultural and Biological Systems Engineering: Faculty Publications

Streambanks can be a significant source of sediment and phosphorus to aquatic ecosystems. Although the streambank-erosion routine in the Soil and Water Assessment Tool (SWAT) has improved in recent versions, the recently developed routine in SWAT 2012 has undergone limited testing, and the lack of site or watershed specific streambank data increases the uncertainty in the streambank-erosion predictions. There were two primary objectives of this research: (1) modify and test the 2012 SWAT streambank-erosion routine on composite streambanks, and (2) compare SWAT default and field-measured channel parameters and assess their influence on predicted streambank erosion. Three modifications were made to …

Creating A Short Scale For In-Flight Experience Quality, Rian Mehta, Stephen Rice

Aeronautics Faculty Publications

Customer service and satisfaction is of great importance to aviation industry as it has an economic impact on the airlines. Customer’s in-flight experience, is tied into their satisfaction with that airline, and in turn has become an area of competition between airlines. This study seeks to develop a statistically valid and reliable scale to empirically measure the quality of the in-flight experience that a passenger would witness on a commercial airline flight within the United States. Actual consumers from the general public were used for each of the five stages of the process, along with input from aviation experts, to …

Magnetic Massive Stars As Progenitors Of ‘Heavy’ Stellar-Mass Black Holes, V. Petit, Z. Keszthelyi, R. Macinnis, D. H. Cohen, R. H. D. Townsend, G. A. Wade, S. L. Thomas, S. P. Owocki, J. Puls, A. Ud-Doula

Aerospace, Physics, and Space Science Faculty Publications

The groundbreaking detection of gravitational waves produced by the inspiralling and coales- cence of the black hole (BH) binary GW150914 confirms the existence of ‘heavy’ stellar-mass BHs with masses >25 M . Initial characterization of the system by Abbott et al. supposes that the formation of BHs with such large masses from the evolution of single massive stars is only feasible if the wind mass-loss rates of the progenitors were greatly reduced relative to the mass-loss rates of massive stars in the Galaxy, concluding that heavy BHs must form in low-metallicity (Z ,:S 0.25 0.5 Z ) environments. However, strong …

Tunneling Nanotubes: An Alternate Route For Propagation Of The Bystander Effect Following Oncolytic Viral Infection, Justin Ady, Venugopal Thayanithy, Kelly Mojica, Phillip Wong, Joshua Carson, Prassanna Rao, Yuman Fong, Emil Lou

Biomedical Engineering and Sciences Faculty Publications

Tunneling nanotubes (TNTs) are ultrafine, filamentous actin-based cytoplasmic extensions which form spontaneously to connect cells at short and long-range distances. We have previously described long-range intercellular communication via TNTs connecting mesothelioma cells in vitro and demonstrated TNTs in intact tumors from patients with mesothelioma. Here, we investigate the ability of TNTs to mediate a viral thymidine kinase based bystander effect after oncolytic viral infection and administration of the nucleoside analog ganciclovir. Using confocal microscopy we assessed the ability of TNTs to propagate enhanced green fluorescent protein (eGFP), which is encoded by the herpes simplex virus NV1066, from infected to uninfected …

Teaching Android Security Through Examples: A Publicly Available Database Of Vulnerable Apps, Daniel E. Krutz, Samuel A. Malachowsky

Articles

Security is hard, and teaching security can be even harder. Here we describe a public educational activity to assist in the instruction of both students and developers in creating secure Android apps. Our set of activities includes example vulnerable applications, information about each vulnerability, steps on how to repair the vulnerabilities, and information about how to confirm that the vulnerability has been properly repaired. Our primary goal is to make these activities available to other instructors for use in their classrooms ranging from the K-12 to university settings. A secondary goal of this project is to foster interest in security …

Conductive Inks And Films Via Intense Pulsed Light., Gabriel L. Draper

Electronic Theses and Dissertations

This research focuses on the investigation of Earth abundant copper and carbon based nanomaterials that are subjected to Intense Pulsed Light Processing to create conductive films, as future flexible electronics and renewable energy solutions would benefit from the quick and scalable production of conductive films. Use of nanomaterials in their oxide/hydroxide forms leads to higher stability in aqueous inks for efficient large area solution deposition. IPL Processing utilized 2044 μs pulses ranging from 589 J - 2070 J over an area of 1.9 cm x 30.5 cm, with energy densities of 10.1, 12.8, 15.8, 19.2, 22.9, 26.8, 31.1 and 35.7 …

Enhancing Capacity And Managing Demand To Increase Short-Term Throughput On The San Francisco-Oakland Bay Bridge, Kevin Reid Carstens

Master's Theses

While there are many proposals for fixing congestion between San Francisco and Oakland in California by adding a new bridge or tube, these solutions will take decades to implement even though a solution is needed now. This thesis assesses sixteen different strategies for reducing congestion in the short-term in the four categories of improving transit, promoting carpooling, implementing intelligent transportation systems practices, and incentivizing alternatives to using the Bay Bridge. Top priorities include HOV improvements on the West Grand Avenue and Powell Street onramps, altering WestCAT Lynx and BART transit services, partnering with rideshare apps to increase transit station accessibility …

Determination Of Seismic Earth Pressures On Retaining Walls Through Finite Element Analysis, Michael Iannelli

Master's Theses

Seismic pressures on displacing or rigid retaining or basement walls have been derived based on the original work of Mononobe and Okabe, who used a shake table to calculate dynamic pressures of displacing retaining walls existing in cohesionless soils. Since this original work was done over eighty years ago, the results of Mononobe and Okabe, colloquially known as M-O theory, have been applied to different conditions, including non-displacing basement walls, as well as changes in soil properties. Since the original work of M-O, there have been numerous studies completed to verify the accuracy of the original calculation, most notably the …

Commencement Program 2016 December: College Of Nursing And Health Innovation, The University Of Texas At Arlington

Commencement Programs, Photos, and Video

No abstract provided.

Electric Smart Load Meter, Johnny Tran

Electrical Engineering

This project details the design of an electric meter that reads the signals of any device plugged into an outlet and displays cost readings that may potentially reduce power consumption. The sensor monitors whether a plugged in device continuously consumes power after completely charging up. For a charging device, the current remains constant until the device reaches 100% charge. Once the device becomes fully charged, the current discontinues for proper power usage. A unique aspect of the meter is that it displays cost per hour, day, and year. Displaying the cost per unit of time creates awareness for customers, potentially …

Garage Door Security System, Trevor Lehr, Austin Williams

Electrical Engineering

This project focuses on the design and build of a low cost system that monitors garage doors and transmits their state to a receiver unit placed at a convenient location inside the user’s house. This provides the user with the ability to monitor their garage doors from the comfort of inside their home without having to go outside and look at the garage. The receiver unit includes a screen to display system information and LEDs to make it easy to view the garage door’s status from a distance. The system has great enough range to place the receiver at any …

Governance By Proxy: Cyber Challenges To Civil Liberties, Niva Elkin-Koren, Eldar Haber

Brooklyn Law Review

No abstract provided.