Digital Commons Network^™

The Bounded Edge Coloring Problem And Offline Crossbar Scheduling, Jonathan Turner

All Computer Science and Engineering Research

This paper introduces a variant of the classical edge coloring problem in graphs that can be applied to an offline scheduling problem for crossbar switches. We show that the problem is NP-complete, develop three lower bounds bounds on the optimal solution value and evaluate the performance of several approximation algorithms, both analytically and experimentally. We show how to approximate an optimal solution with a worst-case performance ratio of 3/2 and our experimental results demonstrate that the best algorithms produce results that very closely track a lower bound.

Faster Maximium Priority Matchings In Bipartite Graphs, Jonathan Turner

All Computer Science and Engineering Research

A maximum priority matching is a matching in an undirected graph that maximizes a priority score defined with respect to given vertex priorities. An earlier paper showed how to find maximum priority matchings in unweighted graphs. This paper describes an algorithm for bipartite graphs that is faster when the number of distinct priority classes is limited. For graphs with k distinct priority classes it runs in O(kmn1/2) time, where n is the number of vertices in the graph and m is the number of edges.

Influence Of Age And Undergraduate College On Physical Activity Habits And Alcohol Use, Adam Sparks

Research Papers

No abstract provided.

Apply Data Clustering To Gene Expression Data, Abdullah Jameel Abualhamayl Mr.

Electronic Theses, Projects, and Dissertations

Data clustering plays an important role in effective analysis of gene expression. Although DNA microarray technology facilitates expression monitoring, several challenges arise when dealing with gene expression datasets. Some of these challenges are the enormous number of genes, the dimensionality of the data, and the change of data over time. The genetic groups which are biologically interlinked can be identified through clustering. This project aims to clarify the steps to apply clustering analysis of genes involved in a published dataset. The methodology for this project includes the selection of the dataset representation, the selection of gene datasets, Similarity Matrix Selection, …

Three Degree-Of-Freedom Parallel Actuator Telescope Mount, Garrett Daniel Gudgel

Master's Theses

This thesis contains the design, implementation, and testing of an original, small-scaled two degree-of-freedom telescope mount and a medium-scaled three degree-of-freedom telescope mount inspired by the six degree-of-freedom Stewart-Gough platform telescope mount. The end product is intended to achieve research-standard resolution of targeted sky coverage for binary star research. The scaled prototype was carried through concept design, manufacturing, software development, and testing. The mount software development and electronic design is applicable to a full-scale mount as the drivers have been designed to be easily adapted to different actuator configurations. It is recommended that this design be implemented into a telescope …

Ergonomics Analysis Of Touchscreen Utilization As A Function Of Preferred Hand And Gender, Jordan E. Odell

Master's Theses

The growth of touchscreen technology has changed the way users interface with a wide range of computing and communication products and systems. Examples range from personal tablets and laptops to industrial applications such as process control, point-of-sales, and ticketing kiosk systems. An important area of application is the automobile industry which is designing cars with touchscreen control panels to replace the previously designed mechanical knobs and buttons. However, interacting with touchscreens does not provide the same tactile feedback as physical mechanisms, therefore they require more precise movement and visual attention, which distracts the user from the primary task.

The purpose …

Inductive Monitoring Systems: A Cubesat Ground-Based Prototype, Michelle Haddock

Master's Theses

Inductive Monitoring Systems (IMS) are the newest form of health monitoring available to the aerospace industry. IMS is a program that builds a knowledge base of nominal state vectors from a nominal data set using data mining techniques. The nominal knowledge base is then used to monitor new data vectors for off-nominal conditions within the system. IMS is designed to replace the current health monitoring process, referred to as model-based reasoning, by automating the process of classifying healthy states and anomaly detection. An IMS prototype was designed and implemented in MATLAB. A verification analysis then determined if the IMS program …

Two-Phase Anaerobic Digestion To Reduce The Nox Emission Potential Of Biogas, Nathaniel Manuel Olivas

Master's Theses

Anaerobic digestion can be used to decrease the mass of organic wastes to be disposed of while producing useful biogas (CH₄ and CO₂) for heat or power production, but in air basins with strict emissions limits, biogas combustion is difficult to implement due to the high costs of controlling NOx emissions. NOx production can be minimized by blending H₂ gas with CH₄ at a volume ratio of 15:85 H₂:CH₄, which allows burning at ultra-lean air-to-fuel ratios. For biogas systems, a potential low-cost NOx control strategy is to produce H₂-CH …

Process Development For Compression Molding Of Hybrid Continuous And Chopped Carbon Fiber Prepreg For Production Of Functionally Graded Composite Structures, Corinne Marie Warnock

Master's Theses

Composite materials offer a high strength-to-weight ratio and directional load bearing capabilities. Compression molding of composite materials yields a superior surface finish and good dimensional stability between component lots with faster processing compared to traditional manufacturing methods. This experimental compression molding capability was developed for the ME composites lab using unidirectional carbon fiber prepreg composites. A direct comparison was drawn between autoclave and compression molding methods to validate compression molding as an alternative manufacturing method in that lab. A method of manufacturing chopped fiber from existing unidirectional prepreg materials was developed and evaluated using destructive testing methods. The results from …

Bit By Bit: Using Design-Based Research To Improve The Health Literacy Of Adolescents, Mega Subramaniam, Beth St. Jean, Natalie Greene Taylor, Christie Kodama, Rebecca Follman, Dana Casciotti

School of Information Faculty Publications

Background: Although a low health literacy level has been found to be among the most powerful predictors of poor health outcomes, there is very little research focused on assessing and improving the health literacy skills of adolescents, particularly those from socioeconomically disadvantaged backgrounds. The vast majority of existing research focuses solely on reading comprehension, despite the fact that health literacy is actually a multifaceted concept, which entails many different types of skills.

Objective: The aim of this paper is to first mine existing literature to identify the many different skills that have been posited to constitute health literacy, and then, …

Borges's Postmodern Landscape, Mario Vrbančić

CLCWeb: Comparative Literature and Culture

In his article "Borges's Postmodern Landscape" Mario Vrbančić examines specific constructs of space -- among them heterotopia (Michel Foucault) and hyperreality (Jean Baudrillard) -- and applies them to narration and narrative strategies in Jorge Luis Borges's texts. Vrbančić posits that postmodern mapping undermines our known familiar geography and that authors like Borges who experimented with different spaces and connections in their texts, represent postmodernism avant la lettre.

Malware Collection And Analysis Via Hardware Virtualization, Tamas K. Lengyel

Doctoral Dissertations

Malware is one of the biggest security threat today and deploying effective defensive solutions requires the collection and rapid analysis of a continuously increasing number of samples. The collection and analysis is greatly complicated by the proliferation of metamorphic malware as the efficacy of signature-based static analysis systems is greatly reduced. While honeypots and dynamic malware analysis has been effectively deployed to combat the problem, significant challenges remain. The rapidly increasing number of malware samples poses a particular challenge as it greatly inflates the cost of the hardware required to process the influx. As modern malware also deploys anti-debugging and …

Optimizing A Luciferase-Based Tool For Studying The Effects Of Fatty Acid Desaturase 7 On Singlet Oxygen Accumulation In Arabidopsis Thaliana, Abeer Muhammedali Alnasrawi

Graduate Theses and Dissertations

In plants, reactive oxygen species (ROS) are generated as a byproduct of normal metabolism, as well as in response to adverse conditions such as light stress, extreme temperatures, and exposure to pests and pathogens. Singlet oxygen (1O2) is a ROS that is formed during photosynthesis in photosystem II (PSII) of the chloroplasts. Levels of 1O2 and other ROS are tightly controlled in healthy plants, but some studies suggest that levels of fatty acid desaturase (FAD) activity in Arabidopsis thaliana can influence constitutive and/or stress-responsive ROS accumulation. In this study, a luciferase-based reporter gene that is selectively stimulated by 1O2 (AAA-ATPase: …

Volume 35, Number 4, December 2015 Olac Newsletter, Marcy Strong, Autumn H. Faulkner, Richard N. Leigh, Jan Mayo, T.J. Kao, Jay Weitz, Lisa Romano

OLAC Newsletters

Digitized December 2015 issue of the OLAC Newsletter.

How Relevant Is The Disclosure Of A Ceo Pay Ratio?, Addison Stanfill

Accounting Undergraduate Honors Theses

An aftershock of the so called “Great Recession” in 2008, the Dodd-Frank Wall Street Reform and Consumer Protection Act effective July 21, 2010 aimed to increase the transparency of public companies. Section 953(b) of this act is targeting the transparency of executive and employee compensation by requiring the disclosure of a CEO to median employee pay ratio. This disclosure requirement, set to affect all filings with a fiscal year beginning after January 1, 2017, was a response to the public outcry against excessive CEO compensation. Although it does promote the transparency initiative of the Dodd-Frank Act, this disclosure may be …

Modeling Arbitrarily Interval-Censored Survival Data With External Time-Dependent Covariates, Wei Fang

Dissertations

Arbitrarily interval-censored survival data refer to the situation where the exact time of the occurrence of an event of interest is only known to have occurred within some two consecutive examinations. External time-dependent covariates refer to those whose values change during the periodic follow-up, and whose value at a particular time does not require individuals to be under direct observation. Regression modeling of survival data usually either handles arbitrarily interval-censored data alone (Farrington, 1996) or external time-dependent covariates alone (Cox, 1972; Therneau & Grambsch, 2000). In the current research, an adjustment has been made to the data augmentation used in …

Gardner-Webb, The Magazine 2015, Fall (Volume 50 No. 2), Noel T. Manning Ii

Gardner-Webb, The Magazine

Gardner-Webb, The Magazine, previously titled The Webb Magazine, focuses on alumni news and campus events from Gardner-Webb College; now Gardner-Webb University. This issue includes several articles about awards and accolades given to students, staff, and Gardner-Webb programs. There is a short article announcing the addition of the Education Hall of Fame. Gardner-Webb's online degrees and classes are praised. Many students are highlighted for their outreach in local and international communities, and several alumni are mentioned for their achievements and contributions to the school and community. Dr. Tom Meaders, a professor at Gardner-Webb is interviewed about his involvement in the Apollo …

College Football Rankings: Maximum Flow Model, Jaymin Patel

Industrial Engineering Undergraduate Honors Theses

College football is a very popular sport in the United States. There is much debate over the college football rankings every week. A maximum flow network is implemented into the CMS+ rankings to observe the effects it has on the college football rankings.

Energy-Environment Policy Alignments, Todd S. Aagaarad

Washington Law Review

Energy law focuses on making energy widely available at reasonable cost, and environmental law focuses on preventing pollution. As a result of these differences in their respective orientations, the two fields often work incoherently and even in conflict. Historically, federal energy law and environmental law have attempted to manage their interrelationships by imposing negative constraints on each other: Energy policies of the Federal Energy Regulatory Commission (FERC) must comply with requirements set forth in environmental statutes, and the Environmental Protection Agency’s (EPA’s) statutes contain energy-related requirements and exemptions. More recently, however, FERC and EPA have begun developing policies that create …

Fluid Uptake Of The Goddard Shale In Southeastern Oklahoma, Usa, Paul Huggins

Earth & Environmental Sciences Theses - Archive

The South Central Oklahoma Oil Province is the current play for the Goddard shale and is also the main field for the underlying Woodford Formation. As of September 2015, an estimated 40 wells have been drilled to evaluate and produce the Goddard shale in the southeastern portion of the Anadarko Basin. With companies reporting initial production rates ranging from 1,000 boe/d to nearly 2,000 boe/d and 30 day reports averaging around 800 boe/d, the amount of recovery from this tight shale reservoir has exceptional potential. Continental Resources Inc. estimates a gross recovery of 940,000 boe per lateral well. Understanding the …

Enhanced Shrinkage Characterization Of Clayey Soils, Raju Acharya

Civil Engineering Dissertations - Archive

Surficial slope failure is a common problem experienced by most of the compacted earth dams in Texas and several other southern states in USA as a result of desiccation or shrinkage induced cracking of the surficial soils. Cracking of the soil occurs when the tensile stress exceeds the tensile strength during drying process. Tensile stress increases with an increase in shrinkage strain and thus soil chemical admixtures can reduce the tensile stress by reducing the shrinkage potential of soil. Inclusion of such admixtures invariably affects the tensile strength. Yet there are not many test methods that could be utilized for …

An Investigation Into The Efficacy Of Mind Maps In Software Development Among Individuals And Pairs, Philip L. Bond

Information Systems & Operations Management Theses - Archive

Software development is a cognitively demanding endeavor in which the creation and exchange of knowledge is paramount. Collaborative development, particularly pair programming, has been more advocated and adopted recently by practitioners. However, empirical studies have not categorically established the efficacy of pairs vis-à-vis individuals in software design contexts. In fact, recent findings suggest that pairs seldom outperform best individuals although they tend to do better than average individuals. Group losses arising from lack of coordination and/or communication could be a plausible explanation for this. The extant literature suggests that Mind Maps have the potential to graphically capture concepts and their …

Commencement Program 2015 December: College Of Business, The University Of Texas At Arlington

Commencement Programs, Photos, and Video

No abstract provided.

Commencement Program 2015 December: College Of Nursing And Health Innovation, The University Of Texas At Arlington

Commencement Programs, Photos, and Video

No abstract provided.

Commencement Program 2015 December: College Of Education, The University Of Texas At Arlington

Commencement Programs, Photos, and Video

No abstract provided.

Commencement Program 2015 December: College Of Engineering, The University Of Texas At Arlington

Commencement Programs, Photos, and Video

No abstract provided.

The Geotraces Intermediate Data Product 2014, The Geotraces Group, Tim M. Conway

School of Geosciences Faculty and Staff Publications

The GEOTRACES Intermediate Data Product 2014 (IDP2014) is the first publicly available data product of the international GEOTRACES programme, and contains data measured and quality controlled before the end of 2013. It consists of two parts: (1) a compilation of digital data for more than 200 trace elements and isotopes (TEIs) as well as classical hydrographic parameters, and (2) the eGEOTRACES Electronic Atlas providing a strongly inter-linked on-line atlas including more than 300 section plots and 90 animated 3D scenes. The IDP2014 covers the Atlantic, Arctic, and Indian oceans, exhibiting highest data density in the Atlantic. The TEI data in …

Developing A Method For Assessing National Demand-Response Transit Level Of Service, Ranjit Prasad Godavarthy, Jeremy Mattson, Del Peterson, Jill Hough

Journal of Public Transportation

Demand-response transit service is a major source of mobility for older adults and people with disabilities in both urban and rural areas in United States. Federal Transit Administration (FTA) grant programs under sections 5307, 5310, and 5311 all have components designed to increase the availability of paratransit or demand-response transit service. However, there is little information in the National Transit Database (NTD) or elsewhere about the extent of demand-response transit service coverage across the country. The lack of data makes it a challenge to identify gaps in service and unmet needs. The primary objective of this study was to fill …

En-Route Planning Of Multi-Destination Public-Transport Trips Using Smartphones, Subeh Chowdhury, Nasser Giacaman

Journal of Public Transportation

Public transport travelers require well-integrated, real-time information systems to use a network. The objective of this study was twofold: (1) to develop a model to determine the effect of personalized information provision through smartphones on user ability to plan multi-destination trips, and (2) to understand user perception of riding public transport aided by real-time, multi-destination trip-planning smartphone applications. Auckland Pioneer was developed for multi-destination trip planning and integrates real-time public transport services with search functions for places of interest. A test trial was conducted in Auckland, New Zealand, and the findings show the effects of the application on multi-destination trip …

Supervised Machine Learning For Classification Of The Electrophysiological Effects Of Chronotropic Drugs On Human Induced Pluripotent Stem Cell-Derived Cardiomyocytes, Christopher Heylman, Rupsa Datta, Agua Sobrino, Steven George, Enrico Gratton

Biomedical Engineering

Supervised machine learning can be used to predict which drugs human cardiomyocytes have been exposed to. Using electrophysiological data collected from human cardiomyocytes with known exposure to different drugs, a supervised machine learning algorithm can be trained to recognize and classify cells that have been exposed to an unknown drug. Furthermore, the learning algorithm provides information on the relative contribution of each data parameter to the overall classification. Probabilities and confidence in the accuracy of each classification may also be determined by the algorithm. In this study, the electrophysiological effects of β–adrenergic drugs, propranolol and isoproterenol, on cardiomyocytes derived from …