Engineering Commons^™

On Improved Accuracy Chirp Parameter Estimation Using The Dfrft With Application To Sar-Based Vibrometry, Satish Mandal

Electrical and Computer Engineering ETDs

The Discrete Fractional Fourier Transform (DFRFT) has in recent years, become a useful tool for multicomponent chirp signal analysis. Chirp signals are transformed into spectral peaks in the chirp rate versus center frequency representation, whose coordinates are related to the underlying chirp parameters via a computed empirical peak to parameter mapping incorporated into the Santhanam-Peacock algorithm.

In this thesis, we attempt to quantify the accuracy of the DFRFT approach by first studying the discretization error sources that arise from the transitioning of the continuous FRFT to DFRFT. Then, we refine prior work by Ishwor Bhatta to develop analytical expressions for …

Designing Smart-Grid Telecommunications Systems Via Interval Flow Network Optimization, Anthony J. Klinkert

Operations Research and Engineering Management Theses and Dissertations

One of the first major, widespread deployments of an Internet of Things (IoT) system is an electric utility’s smart-grid communications network. Communication networks support utility smart-grids for an electrical power provider by linking industrial IoT devices on the grid, such as residential and commercial customers’ electric meters to the utility’s data center. A new solution methodology and software tool is applied to the optimization of an electric utility smart-grid communications network. This research provides utilities with a technique to reduce cost of new and current communications networks for smart-grid programs. This research introduces the use of a new advanced optimization …

Us Regional Airline Pay Scale Changes, Alex Nikle, Elizabeth Bjerke

International Journal of Aviation, Aeronautics, and Aerospace

The United States regional air carrier industry has recently undergone a substantial transformation in pilot salaries and hiring practices. Regional airlines are employing professional aviators at unprecedented rates in response to economic growth, regulatory reform, and legacy air carrier retirements. The combination of these factors has spurred demand for qualified air carrier pilots. As the hiring continues to increase, regional airlines are finding new ways to attract certified pilots to include: salary increases, bonuses incentives, and legacy airline employment flow agreements. The following report analyzes the salary changes that have occurred at US regional airlines from 2007-2017. From this data, …

Study Of Building Vibrations Caused By Machinery, Bipesh Shrestha

Civil Engineering ETDs

ABSTRACT

This thesis studies the vibration of structures caused by machinery. Machines exhibit unique vibrational characteristics. This thesis focuses on detection of these unique vibrational characteristics through the study of structural vibration caused by machines. The study extends from simple laboratory structures to a real existing building called the Ford Utility Building. The vibrational readings on the roof of the Ford Utility Building are studied to capture signals that can be attributed to machines running inside the building. This thesis supports the research in remote detection and identification of concealed machinery through SAR vibrometry.

A study of human perception of …

Achieving Public Health And Climate Change Goals: What Do We Need To Know About The Transportation System?, Mohammad Tayarani

Civil Engineering ETDs

The overall aim of this dissertation is evaluating what new knowledge can be gained about the environmental and public health outcomes of regional transportation planning strategies by implementing a suite of more spatially and temporally detailed transportation and air quality models. This new knowledge can be used to better understand the potential health effects of emissions exposure while also guiding the development of new transportation and land-use plans, and related policies that have the potential to achieve large reductions in pollution exposure and green house gas emissions at local and regional level.

Automated Development Of Semantic Data Models Using Scientific Publications, Martha O. Perez-Arriaga

Computer Science ETDs

The traditional methods for analyzing information in digital documents have evolved with the ever-increasing volume of data. Some challenges in analyzing scientific publications include the lack of a unified vocabulary and a defined context, different standards and formats in presenting information, various types of data, and diverse areas of knowledge. These challenges hinder detecting, understanding, comparing, sharing, and querying information rapidly.

I design a dynamic conceptual data model with common elements in publications from any domain, such as context, metadata, and tables. To enhance the models, I use related definitions contained in ontologies and the Internet. Therefore, this dissertation generates …

Analysis Of Double-Wall And Twisted-Tube Heat Exchanger Concepts For Use In Fluoride Salt-Cooled High-Temperature Reactors, Bryan M. Wallace

Nuclear Engineering ETDs

Fluoride Salt-cooled High-temperature Reactors (FHRs) are an attractive fourth generation reactor concept. Like other fourth generation concept designs, FHRs offer characteristics such as a high-temperature low-pressure molten salt coolant allowing the reactor to be combined with a high-temperature high-efficiency power generation cycle such as an air-Brayton or supercritical carbon dioxide (SCO2). \par

Like most Gen IV reactor concepts, there are a few problems which need to be addressed with the design before it can be licensed. One particular design is the Mark 1 pebble bed FHR, a design put out by the University of California Berkeley. Two problems that need …

Ascertaining The Impact Of P–12 Engineering Education Initiatives: Student Impact Through Teacher Impact, Marissa H. Forbes, Jacquelyn F. Sullivan, Denise W. Carlson

Journal of Pre-College Engineering Education Research (J-PEER)

The widespread need to address both science, technology, engineering, and math (STEM) education and STEM workforce development is persistent. Underscored by the Next Generation Science Standards, demand is high for P–12 engineering-centered curricula. TeachEngineering is a free, standards-aligned NSF-funded digital library of more than 1,500 hands-on, design-rich K–12 engineering lessons and activities. Beyond anonymous site-user counts, the impact of the TeachEngineering collection and outreach initiatives on the education of children and their teachers was previously unknown. Thus, the project team wrestled with the question of how to meaningfully ascertain classroom impacts of the digital engineering education library and—more broadly—how to …

How To Shape Attitudes Toward Stem Careers: The Search For The Most Impactful Extracurricular Clubs, Fethiye Ozis, Ali Osman Pektas, Mustafa Akca, Daniel’Le April Devoss

Journal of Pre-College Engineering Education Research (J-PEER)

It is well known that strong extracurricular STEM programs provide multiple arenas for students to expand on classroom curriculum, complementing STEM skills with creative thinking and open-ended problem solving. It has been shown that there is a relationship between the number of STEM clubs students participated in and their choice of STEM major (Sahin, 2013). Considering financial problems, including budget cuts, it gets really challenging for schools to provide a plethora of clubs. For this reason, it would be very beneficial for K–12 schools to know if certain clubs are more effective in changing attitudes toward STEM majors, and therefore …

‘‘Lend A Hand’’ Project Helps Students: Improved Spatial Visualization Skills Through Engaging In Hands-On 3-D Printed Prosthetics Project During A 9th Grade Engineering Course, Shaunna Smith, Kimberly Talley

Journal of Pre-College Engineering Education Research (J-PEER)

Research shows that high spatial ability is linked to success and persistence in STEM. Empirical investigations often report a gender gap in favor of male students. The purpose of this research study was to assess changes to 9th grade engineering students’ spatial visualization skills through engagement in a nine-week collaborative 3-D printed prosthetics project embedded within their existing ‘‘Beginning Concepts of Engineering’’ course curriculum. Using concurrent mixed methods, this study examined pre-/post-test scores on the Revised Purdue Spatial Visualization Test: Rotations (Revised PSVT:R) in connection with gender, course grades, and level of involvement in the project. Both male and female …

Ribbon Cutting Marks Growing University-Industry Partnerships, Usu College Of Engineering

College of Engineering News

The College of Engineering at Utah State University invites students, faculty, staff and members of the community to a special ribbon-cutting ceremony on Monday, May 14 at the USU Electric Vehicle & Roadway (EVR) Research Facility & Test Track.

Optimization Of Supersingular Isogeny Cryptography For Deeply Embedded Systems, Jeffrey Denton Calhoun

Electrical and Computer Engineering ETDs

Public-key cryptography in use today can be broken by a quantum computer with sufficient resources. Microsoft Research has published an open-source library of quantum-secure supersingular isogeny (SI) algorithms including Diffie-Hellman key agreement and key encapsulation in portable C and optimized x86 and x64 implementations. For our research, we modified this library to target a deeply-embedded processor with instruction set extensions and a finite-field coprocessor originally designed to accelerate traditional elliptic curve cryptography (ECC). We observed a 6.3-7.5x improvement over a portable C implementation using instruction set extensions and a further 6.0-6.1x improvement with the addition of the coprocessor. Modification of …

Re-Evaluating Performance Measurement: New Mathematical Methods To Address Common Performance Measurement Challenges, Jordan David Benis

Electronic Theses and Dissertations

Performance Measurement is an essential discipline for any business. Robust and reliable performance metrics for people, processes, and technologies enable a business to identify and address deficiencies to improve performance and profitability. The complexity of modern operating environments presents real challenges to developing equitable and accurate performance metrics. This thesis explores and develops two new methods to address common challenges encountered in businesses across the world. The first method addresses the challenge of estimating the relative complexity of various tasks by utilizing the Pearson Correlation Coefficient to identify potentially over weighted and under weighted tasks. The second method addresses the …

The Santa Clara, 2018-05-10, Santa Clara University

The Santa Clara

No abstract provided.

Density And Velocity Measurement Of Ari And Arii Using Laser Induced Fluorescence (Lif) In A Large-Scale Helicon Plasma, Ralph F. Kelly

Electrical and Computer Engineering ETDs

Helicon plasma sources are widely used in basic plasma science, as well as for materials processing. These plasmas typically operate at high gas fill pressure, and therefore have significant densities of neutral particles. However, the role of neutrals in the overall plasma dynamics, such as ion flows, remains poorly understood. There are at least two possible mechanisms for neutrals to influence ion flows. One is an FxB drift, where F is the force exerted on ions by neutrals through collisions. The second is through Pedersen conductivity which is dependent on the ratio of the ion cyclotron frequency, ω …

Split-Ring Resonator Waveguide Structure Characterization By Simulations, Measurements And Linear Time-Invariant Modeling, Mohamed Aziz Hmaidi

Electrical and Computer Engineering ETDs

Interest in Metamaterials has been rising drastically in the recent years as they have been used in several optical and RF applications, from antennas to perfect lenses and pulsed power devices. Nevertheless, the time-behavior of metamaterials remains opaque and poorly understood.

In this research work, characterization of a metamaterial structure in time and frequency-domain was made through simulations and experiments. The structure consists in a series of edge-side coupled Split Ring Resonators (SRRs) in a below cutoff waveguide. A linear time invariant model of distributed elements has been elaborated as well in an attempt to approach the structure’s behavior. The …

Physical And Social Systems Resilience Assessment And Optimization, Daniel Romero Rodriguez

USF Tampa Graduate Theses and Dissertations

Resilience has been measured using qualitative and quantitative metrics in engineering,economics, psychology, business, ecology, among others. This dissertation proposes a resilience metric that explicitly incorporates the intensity of the disruptive event to provide a more accurate estimation of system resilience. A comparative analysis between the proposed metric and average performance resilience metrics for linear and nonlinear loss and recovery functions suggests that the new metric enables a more objective assessment of resilience for disruptions with different intensities. Moreover, the proposed metric is independent of a control time parameter. This provides a more consistent resilience estimation for a given system and …

The Academic Perspective: A Study Of Academic Conceptions Of The Importance Of Professional Skills In Engineering Programmes In Ireland, Una Beagon

Conference papers

This presentation outlines a phenomenographic research study which aims to explore engineering academics experiences and conceptions towards developing professional skills within engineering students in Ireland. The research is undertaken in two phases. Phase One is an online survey circulated to academics teaching on engineering programmes in Ireland (n=273). Phase Two will consist of in-depth interviews.

The overall phenomenographic study aims to answer the research question;

• What are the qualitatively different ways that academics experience and conceptualise teaching and the development of professional skills in engineering programmes in Ireland?

Electrical & Computer Engineering News, Georgia Southern University

Electrical & Computer Engineering: News & Publications (2014-2023)

• Data-driven Adaptive Optimal Control and Its Applications
• Delivering Ultra-Reliable, LowLatency Communications, by Dr. Omid Semiari
• “Human RF Exposure to Cellular Communication Networks, BY Dr. Kim”

The Role Of Criticality Of Gene Regulatory Networks On Emergent Properties Of Biological Systems, Hyobin Kim

Graduate Dissertations and Theses

The relationship between criticality of gene regulatory networks (GRNs) and dynamics of GRNs at a single cell level has been vigorously studied. However, the relationship between the criticality of GRNs and properties of multicellular organisms at a higher level has not been fully explored. Here we aim at revealing potential roles of the criticality of GRNs at a multicellular and hierarchical level, using a random Boolean network as a GRN. We perform three studies. Firstly, we propose a GRN-based morphogenetic model, and delve into the role of the criticality of GRNs in morphogenesis at a multicellular level. Secondly, we include …

Thermal Fluid Models Of A Hydrogel Delivery System For Pancreatic Cancer Treatment, Nesrine Bouhrira

Theses and Dissertations

Pancreatic cancer is one of the most devastating cancers with low survival rates. This disease is difficult to detect due to the pancreas's location deep within the body. Therefore, diagnoses are often made in the later stages, making treatment options more limited and difficult. It has been hypothesized that direct injection into the tumor would enhance drug effectivenes. Therefore, we examined the use of endoscopic ultrasound (EUS) combined with a fine needle injection to deliver a drug-eluding thermosensitive hydrogel directly into the tumor. Unfortunately normal body temperatures surrounding the EUS can warm the hydrogel drug combination beyond its phase transition …

Uncertainty Aware Mapping Of Embedded Systems For Reliability, Performance, And Energy, Wenkai Guan, Milad Ghorbani Moghaddam, Cristinel Ababei

Electrical and Computer Engineering Faculty Research and Publications

Duo to technology downscaling, embedded systems have increased in complexity and heterogeneity. Increasingly large process, voltage, and temperature variations negatively affect the design and optimization process of these systems. These factors contribute to increased uncertainties that in turn undermine the accuracy and effectiveness of traditional design approaches. In this paper, we formulate the problem of uncertainty aware mapping for multicore embedded systems as a multi-objective optimization problem. We present a solution to this problem that integrates uncertainty models as a new design methodology constructed with Monto Carlo and evolutionary algorithms. The methodology is uncertainty aware because it is able to …

Institutionalization Of Quality Management Systems In The Central Registry Of The Central Drug Control Laboratory, National Agency For Food And Drugs Administration And Control, Nigeria, Abigail Ekeigwe, Kari Clase Prof., Stephen Byrn

BIRS Symposium

No abstract provided.

More Accurate Process Understanding From Process Characterization Studies Using Monte Carlo Simulation, Regularized Regression, And Classification Models, Cary Opel, Cerintha J. Hui, Patrick Y. Yang, Daniel J. Tien, Gayle E. Derfus, Rajesh Krishnan

Cell Culture Engineering XVI

Establishment of an appropriate control strategy with defined operating ranges (OR) predicted to meet a target product profile is a critical component of commercializing new biologics under the Quality by Design (QbD) approach. Process characterization (PC) studies are performed to expand process understanding by achieving two main goals: 1) determining which process parameters have significant effects on quality attributes and 2) establishing models describing the relationships between these critical process parameters (CPP) and critical quality attributes (CQA). Risk assessment and design of experiments (DOE) techniques are effectively deployed in the industry to identify parameters to study and build process understanding. …

Design And Preliminary Testing Of An Improved Abdomen Testing Device For Use In Hernia Repair Modeling, Alexandra Dunbar

McKelvey School of Engineering Graduate Student Theses & Dissertations

No abstract provided.

A Study Of Light-Matter Interaction In Nanopatterned Arrays And Biosensing Applications, Mohammad Waliullah

Student Theses and Dissertations

Food fraud and adulteration issue is persistent everywhere in today’s world. Identification of the seafood and meat species correctly, swiftly and economically is a necessity to fight this issue. Every species has its unique DNA. Therefore, identification of DNA will lead to identification of species. Before identification, DNA must be amplified to facilitate analysis. The traditional methods for both amplification and identification of DNA require sophisticated laboratory, trained personnel, high cost and long time. In case of amplification, choosing Recombinase Polymerase Amplification (RPA) method over traditional barcoding method can reduce these problems. In case of identification, fabrication of a novel …

Real-Time Detection Of Cravings In Individuals With Substance Abuse Using Wearable Biosensors And Machine Learning, Keerthi Kumar Chintha

Electrical Engineering Theses

Deaths in the US have drastically increased over the past decade due to addictive behaviors and drugs. According to the World Health Organization (WHO), 1 in 20 adults between the age of 15 and 64 years are addicted to at least one illicit drug; globally, 29 million people are suffering from drug use disorder. The addiction of narcotics alters a person’s primary function as well as critical areas of the brain due to multiple reasons like genetics, hereditary, stress or pressure, and mental health conditions. It not only affects an individual but also their families. Intensive research has been launched …

Assessment Of Risk In Preterm Infants Using Point Process And Machine Learning Approaches, Venkata Naga Sai Apurupa Amperayani

Electrical Engineering Theses

Preemies, infants who are born too soon, have a higher incidence of Life-Threatening Events (LTE’s) such as apnea (cessation of breathing), bradycardia (slowing of heart rate) and hypoxemia (oxygen desaturation) also termed as ABD (Apnea, Bradycardia, and Desaturation) events. Clinicians at Neonatal Intensive Care Units (NICU) are facing the demanding task of assessing the risk of infants based on their physiological signals. The aim of this thesis is to develop a risk stratification algorithm using a machine-learning framework with the features related to pathological fluctuations derived from point process model that will be embedded into the current physiological recording system …

Digital Enhancement Of Analog Measurement Systems For Temperature Compensation Of Strain Gages, Islombek Karimov

Electrical Engineering Theses

Generally known temperature compensation techniques for strain gages (like the use of a dummy gage or the implementation of half- and full-bridge configurations) are not applicable to all strain-measurement situations and cannot fully compensate for all sources of error. Digital Enhancement of Analog Measurement Systems presents a universal method of corrections for these effects in which temperature is measured independently of other variables and ex post facto corrections are computed and applied to digitized readings of the analog measurement system.

A single, linear-pattern strain gage, self-temperature-compensated for steel 1018, has been utilized in a quarter-bridge to measure tensile strain in …

Electrical & Computer Engineering News, Georgia Southern University

Electrical & Computer Engineering: News & Publications (2014-2023)

• Control of High-Frequency Power Electronic Systems