Digital Commons Network^™

Multiple Security Domain Non Deducibility In The Freedm Smart Grid Infrastructure, Manish Jaisinghani

Masters Theses

"The building block of today's world are not materials, but, computers and algorithms with communication networks between physical entities. A cyber physical system (CPS) is a system in which the cyber and physical entities of the system work together towards a common goal, for example a water treatment facility or an electricity distribution system. These cyber physical infrastructures affect day to day lives of people and hence become target point for the attackers to disrupt normal daily life. Owing to the complexity of a cyber physical system, the attacks have themselves become sophisticated and harder to detect. These sophisticated attacks …

Examination Of Shear Friction Design Provisions, Nikkolas J. Edgmond

Masters Theses

"This thesis reports the results of research conducted to establish a state-of-the-art database of shear-friction studies to be turned over to ACI Committee 445-0D as a living document, utilize a subset of the established database to examine the effectiveness of the ACI 318 Code (2014), PCI Design Handbook (2010), AASHTO LRFD Bridge Design Specification (2016) and CSA A23.3 Design of Concrete Structures Standard (2014) provisions to predict shear transfer strength, and examine the effective coefficient of friction (µ_e) approach allowed in the PCI Design Handbook (2010).The shear friction design concept is applicable in conditions where direct shear must …

Recycling Effect In Expanded Granular Sludge Bed Reactor And Implementation Of Six Sigma In A Methane Generation Process, Manohar Manchenahalli Shivashankaraiah

Masters Theses

"Brewery industries are the largest consumers of water among several production industries. Despite consuming these huge amounts of water and electricity, they generate by-products that are harmful to the environment. These by-products contain organic, inorganic, and solid wastes with high chemical oxygen demand (COD) strength. The anaerobic digestion (AD) process plays an important role in treating this wastewater. This study investigates the design and development of an expanded granular sludge bed reactor (EGSB) effluent recirculation, which can achieve high COD removal efficiency of the wastewater and enhance the efficiency of generating biogas with high yields and increases in the concentration …

Multi-Objective Optimal Battery Placement In Distribution Networks, Kiana Khalilnejad

Masters Theses

"Due to high penetration of renewable energy resources in today's electricity generation, considerable voltage fluctuations are witnessed in power systems. As an attempt to solve this issue, in this study, multi-objective optimal placement and sizing of distribution-level battery storage system is performed using semidefinite programing. Placement of one or multiple battery system is studied under various objectives including the cost, voltage regulation, reactive power dispatch, renewable resource curtailment, and minimum network power losses. Power flow equations are solved in the form of semidefinite constraints and the rank constraint is ignored. Additionally, combination of these objectives to form a multi-objective problem …

Cloud Transactions And Caching For Improved Performance In Clouds And Dtns, Dileep Mardham

Masters Theses

"In distributed transactional systems deployed over some massively decentralized cloud servers, access policies are typically replicated. Interdependencies ad inconsistencies among policies need to be addressed as they can affect performance, throughput and accuracy. Several stringent levels of policy consistency constraints and enforcement approaches to guarantee the trustworthiness of transactions on cloud servers are proposed. We define a look-up table to store policy versions and the concept of "Tree-Based Consistency" approach to maintain a tree structure of the servers. By integrating look-up table and the consistency tree based approach, we propose an enhanced version of Two-phase validation commit (2PVC) protocol integrated …

Simultaneous Enhancement Of Fluidity And Thixotropy Of Vibration-Free Concrete, Piyush Rajendra Lunkad

Masters Theses

"This research articulates the development of a vibration-free concrete for slip-form paving enabling a simple and rapid construction process. To achieve this, properties such as rheology including thixotropy, shape stability, and workability loss with time are mainly investigated. Concrete mixture with high thixotropic strength and its shape holding ability, flowability, and workability retention with time is evaluated. This study consists of two phases: (1) selection of paste component from rheology of cement paste incorporating various micro- and nano- sized particles (2) study of fresh properties of concrete mixtures using the excess paste layer concept.

From the cement paste study, it …

Transmission Line Inspection Using Suspended Robot: Cost Effective Analysis And Operational Routing Identification, Balaji Rathinam Nagarajan

Masters Theses

"High voltage transmission lines form a crucial part of the energy infrastructure of a country. Effective maintenance is required to maintain its reliability and reduce the probability of the occurrence of the outage. Conventionally, the routine inspection of the transmission line was conducted by linemen with the assistance of hot stick and helicopter, which is considered dangerous, time-consuming, and expensive.

In this thesis, we focus on the initial study of seeking the state of the art robotics technology to by largely replace human beings in transmission line inspection. The existing robotics technologies that are interested by utility companies, as well …

Cellulose And Sulfate Degradation In A Biochemical Reactor During Treatment Of Mine Drainage, Sweta Ojha

Masters Theses

"Seventy-two biochemical reactors were set up, and operated using a mixture of chip-bark, horse manure, and gravel as the biochemical treatment substrate. The simulated mine water containing sulfate (1000 mg/l) was pumped into each reactor at a flow rate of 0.5 ml/minute (approximate), giving an empty bed contact time of 8 days. The main idea is that the microorganisms present in horse manure would convert the cellulose in chip-bark into volatile fatty acids. The produced volatile fatty acid would enhance the metabolism of sulfate-reducing bacteria (SRB) initially present in horse manure, which would degrade (and eventually remove) the sulfate from …

Models For High Dimensional Spatially Correlated Risks And Application To Thunderstorm Loss Data In Texas, Tobias Merk

Masters Theses

"Insurance claims caused by natural disasters exhibit spatial dependence with the strength of dependence being based on factors such as physical distance and population density, to name a few. Accounting for spatial dependence is therefore of crucial importance when modeling these types of claims. In this work, we present an approach to assess spatially dependent insurance risks using a combination of linear regression and factor copula models. Specifically, in loss modeling, observed dependence patterns are highly nonlinear, thus copula-based models seem appropriate since they can handle both linear and nonlinear dependence. The factor copula approach for estimating the spatial dependence …

Generalized Adaptive Variable Bit Truncation Model For Approximate Stochastic Computing, Keerthana Pamidimukkala

Masters Theses

"Stochastic computing as a computing paradigm is currently undergoing revival as the advancements in technology make it applicable especially in the wake of the need for higher computing power for emerging applications. Recent research in stochastic computing exploits the benefits of approximate computing, called Approximate Stochastic Computing (ASC), which further reduces the operational overhead in implementing stochastic circuits. A mathematical model is proposed to analyze the efficiency and error involved in ASC. Using this mathematical model, a new generalized adaptive method improving on ASC is proposed in the current thesis. The proposed method has been discussed with two possible implementation …

Loss Of Trust: The Negative Effects Of Leader Discrimination And The Mitigating Effects Of Organizational Response, Andrew Wade Pepper

Masters Theses

"This thesis focuses on how perceptions of leader discriminatory behavior influence trust in the leader and, subsequently, attitudes about the organization which the leader represents. This study builds on previous research findings by creating a 2 (discriminatory interaction) X 2 (procedural response) X 2 (distributive response) experimental design model with vignettes that focused a leader's discriminatory or non-discriminatory behaviors and how the organization responds to accusations of such behavior. Participants (N = 293) were recruited from Amazon Mechanical Turk and randomly assigned to read one of the two vignettes describing a supervisor's discriminatory or non-discriminatory behavior. After reporting perceptions shaped …

Fuel Burnup Simulation And Analysis Of The Missouri S&T Reactor, Joshua Hinkle Rhodes

Masters Theses

"The purpose of this work is to simulate the fuel burnup of the Missouri S&T Reactor. This work was accomplished using the Monte Carlo software MCNP. The primary core configurations of MSTR were modeled and the power history was used to determine the input parameters for the burnup simulation. These simulations were run to determine the burnup for each fuel element used in the core of MSTR.

With these simulations, the new predicted isotopic compositions were added into the model. New core configurations were determined, and the burnup corrected model was used to predict the excess reactivity and control rod …

Nonlinear Finite Element Analysis Of Concrete Columns Subjected To Complex Loading, Adam Christopher Morgan

Masters Theses

"This study details the development and implementation of a finite element model within a commercial finite element code, Abaqus CAE, for the analysis of reinforced concrete (RC) bridge columns containing interlocking spirals subjected to combined loading conditions including axial, shear, bending, and torsional loads, including the post-peak response. The model is a first of its kind attempt at simulating the response of RC columns with continuous spiral transverse reinforcement and subjected to combined loading conditions including torsion. The model is utilized to determine the quasi-static load-deformation response under various proportions of the input loads and displacements. The resulting quasi-static load-deformations, …

Cyber-Physical Security Of An Electric Microgrid, Prashanth Palaniswamy

Masters Theses

"Cyber-physical systems (CPSs) are physical systems that are controlled or monitored by computer-based systems. CPSs are a combination of computation, networking, and physical processes. As CPSs are a combination of various diverse components, they are vulnerable to several security threats. Moreover, there are many different security domains (not just high/low, nor necessarily hierarchical). This paper utilizes previously developed multiple security domain nondeducibility (MSDND) to uncover potential integrity vulnerabilities in an electric microgrid. Invariants are manually generated using the insights obtained through MSDND analysis and use linear regression to automate the generation of invariants. The vulnerabilities are then mitigated, to the …

Controlling Phase Fractions Of 304l-Ss In Selective Laser Melting Using Cooling Rate, Eberechukwu Anthony Okoro

Masters Theses

"This study examines the thermal profile and the ferrite-austenite phase fractions upon heating and cooling of 304- stainless steel powder via Selective Laser Melting (SLM). Experiments were performed to validate the ABAQUS finite element model, while the phase transformation simulation was performed using MatCalc and ThermoCalc. A correlation between the thermo-mechanical changes in ABAQUS and the microstructural changes from MatCalc was obtained by matching their cooling rates. The result indicates that cooling rate has a significant effect on the phase fractions of FCC and BCC formed in 304L stainless steel via the SLM process. The results also indicate that for …

An Approach For Formal Analysis Of The Security Of A Water Treatment Testbed, Sai Sidharth Patlolla

Masters Theses

"This thesis focuses on securing critical infrastructures such as chemical plants, manufacturing units, and power generating plants against attacks that disrupt the information flow from one component to another. Such systems are controlled by an Industrial Control System (ICS) that includes controllers communicating with each other, and with physical sensors and actuators, using a communications network.

Traditional security models partition the security universe into two worlds, secure and insecure, but in the real world the partitions often overlap and information is leaked even through the physical observation which makes it much harder to analyze a Cyber physical system (CPS). To …

Assessment And Analysis Of Receptive And Expressive English Language Development In Spanish Speaking Ells And Native English Speakers Using The Pre-Klba, Candace Laprairie

Masters Theses

The purpose of this study is to examine the trends and differences in receptive and expressive English language development in native English speakers and Spanish-speaking English language learners (ELL). It also aims to analyze the relationship between auditory comprehension and narrative production skills and semantic skills and narrative production skills in native English-speakers and Spanish-speaking ELLs. Eighty-three preschool-aged children (17 Spanish-speaking ELLs and 66 Native English-speakers) were administered the Pre-Kindergarten Language Benchmark Assessment (Pre-KLBA) in Fall 2015, Winter 2016, and Spring 2016. This study utilized a three by two ANOVA to evaluate and determine: 1) If there are differences in …

An Analysis Of The Meaning, Barriers, And Value Of Developmental Education For First-Generation Minority Students At A Community College, Molly Murphy

Masters Theses

This qualitative, phenomenological study was designed to learn more about how first-generation, minority community college students perceive the meaning, barriers, and value of developmental education. Five participants were interviewed in a semi-structured format. The results provided nuanced and personal accounts from students who revealed that developmental education affects their feelings of self-efficacy, that systemic financial challenges are consistent barriers to success, and that the connections between teachers and their students, or lack thereof, are perceived to have an impact on the usefulness of developmental education. Finally, results indicated the importance of working with students individually to understand how their ethnic …

Fighting Poverty With Passion: Americorps Vista As A Replicable Solution To Local Poverty, Jonathan M. Williams

Masters Theses

This study examines the replicability and effectiveness of AmeriCorps VISTA projects in fighting poverty at the state and local levels. AmeriCorps VISTA (Volunteers in Service to America) is the chief domestic program of the Federal Government's Corporation for National and Community Service. The scope of this study focuses on the seven states that comprise the Corporation's North Central Cluster, (Illinois, Indiana, Iowa, Michigan, Minnesota, Ohio, and Wisconsin) and the AmeriCorps VISTA projects that operated in these states due to funding from the 2009 American Recovery and Reinvestment Act. The selected region offers a microcosm of the nation's geographical and political …

An Examination Of Teachers' Natural Praise-To-Reprimand Ratios And Teachers' Perceptions Of Self-Efficacy And Stress, Sara Hayn

Masters Theses

The current study examined teachers' natural use of praise and reprimand in middle and high school (sixth through twelfth grade) general education classrooms. In addition, the relations between praise and reprimand and teacher stress and self-efficacy were examined. Praise and reprimand data were collected via 20-minute, direct observation (940 total observation minutes). On average, middle and high school teachers delivered 11.7 total praises per hour and 10.4 total reprimands per hour (1.1 to 1 praise-to-reprimand ratio). Middle school teachers delivered 12.8 total praises per hour and 14.5 total reprimands per hour (0.9 to 1 praise-to-reprimand ratio) and high school teachers …

Student And Instructor Attitudes Toward 21st Century Writing Technologies In The Rural Secondary English Classroom, Casey Crowhurst

Masters Theses

This thesis focuses on how students and teachers feel about the current use of technologies like Chromebooks and laptops in the rural secondary English classroom. Chapter one describes my personal journey as a student and educator using various technologies in the classroom, and how I came upon the idea for this study while observing one of the first high schools to implement full 1:1 Chromebook technology in the United States. Then, I discuss my review of the current literature on the subject, and find that there is a lack of knowledge about the emergence of these types of technologies, and …

The Meaning Of A Woman's Work: Refugees, Statelessness, Nationality, And The Women's International League For Peace And Freedom, 1918-1931, Monica Burney

Masters Theses

This work analyzes how the Women's International League for Peace and Freedom (WILPF) sought to influence how the League of Nations approached questions of nationality and statelessness between 1918 and 1931. Especially important were the WILPF's efforts to aid women and children who remained in Turkey following the Armenian genocide, as well as the organization's efforts to address the statelessness crisis that arose following the dissolution of Austria-Hungary. Their activism helped to pressure the League of Nations into creating the Commission of Enquiry on Deported Women and Children in Turkey and Asia Minor. Their efforts to end statelessness culminated in …

Professional And Technical Writing In The High School Setting, Kristy C. Bennett

Masters Theses

No abstract provided.

Influences On International Students' Selection Of A Regional U.S. Institution: A Descriptive Study, Yazmin Rodriguez

Masters Theses

This study examined the factors influencing international students' election to study in the United States in general and at a regional four-year institution, specifically. Furthermore, it was designed to gather descriptive information about the barriers and challenges they face. A triangulation mixed methods approach was utilized based on a previously described push-pull model. The findings indicated that Availability of scholarships or work, cost and fees, and Visa processing and visa cost are the most difficult factors that international students face when making the decision to study in the U.S. This corresponded well with the qualitative responses from the …

Branding & Style Guides: Editing For Usability (A Project For Lake Land College), Baylor D. Gardner

Masters Theses

No abstract provided.

Promoting A Galaxy Far, Far Away: Changes In Promotional Strategies Seen In Star Wars Marketing Campaigns, Michael Fenton

Masters Theses

This piece examines promotional material from the Star Wars campaigns for The Phantom Menace in 1999 and The Force Awakens in 2015 to find differences in promotional strategies with regards to globalization, fandom and fan perception and the use of online spaces. Trailers, tie-in product materials and websites are given visual and textual analysis to find how the films have evolved to accommodate a larger, more culturally diverse audience. In doing so this piece seeks to understand how the changing consumer landscape is impacting the way product are advertised, and how prospective advertisers can maximize their audience through adjusting their …

Ethnic Identity Development Of 1.5 Generation Filipino American Immigrants: A Qualitative Study, Catherine Welsh

Masters Theses

This qualitative study examines ethnic identity development of 1.5 generation Filipino American immigrants in U.S. The survey methods used in the study were a demographic questionnaire, and semi-structured interview. Two Filipino students, one from the Southwest and the other from the Midwest regions of the U.S. participated in the study. Two research questions guided this study; what factors influence the ethnic identity development of the 1.5 generation Filipino American immigrants, and what strategies educators can use to facilitate 1.5 generation Filipino American immigrant student success. The results of the study revealed six themes. Three themes emerged from research question one …

Is The Relationship Between College Drinking Behaviors And Social Anxiety Mediated By Alcohol Expectancies And Traumatic Life Experiences?, Cortney Lin Kingsmill

Masters Theses

The relationship between alcohol consumption and social anxiety is difficult to understand, as there have been mixed findings in the research. In general, a positive correlation has been found between the two, with a focus on the mediating effect of alcohol outcome expectancies. Both positive expectancies and trauma have been correlated positively with social anxiety and drinking behavior. This paper reviews the literature and examines the relationship between social anxiety and alcohol consumption. A mediated model between these two variables with the mediators being alcohol expectancies and traumatic experiences was proposed, but this model did not fit the date. Specifically, …

Introducing The Hero Of Stasis: An Examination Of Heroism In David Foster Wallace's Infinite Jest And The Pale King, Gregory Robert Peterson

Masters Theses

No abstract provided.

Elementary Students' Analysis Of Diverse History-Based Sources, Tara Richeson

Masters Theses

This study analyzed students' use of diverse sources for a history-based writing assignment on Abraham Lincoln. Participants includes 41 students in a fifth grade self-contained classroom in rural Illinois. The study was conducted during students' 30-minute writing period, every day for six weeks. During this time period, students close-read trade books and primary sources to collect research on Lincoln. Students also gathered additional information during their field trip to the Abraham Lincoln Presidential Library and Museum. Students synthesized their information from the various sources and organized the notes to write an informational, history-based writing piece on Lincoln. Students were required …