Engineering Commons^™

Space-Time Block-Encoded 16-Apsk In Aeronautical Mobile Telemetry, Autumn Twitchell

Theses and Dissertations

The two-antenna problem in aeronautical mobile telemetry is created by the reception of two copies of the same RF waveform with different phases and time delays. Alamouti and Alamouti-like space time block codes can solve the two-antenna problem, but the decoder/detector needs to account for the different time delays between the signals received from the two transmit antennas. In this thesis, a comparison is made between the performance of Alamouti space-time block codes and time-reversed space-time block codes with 16-APSK to solve the two-antenna problem. The maximum likelihood decoder/detector for Alamouti-encoded 16-APSK is a sequence detector operating on a trellis …

Developing Ultra-High Resolution 3d Printing For Microfluidics, Kent Richard Hooper

Theses and Dissertations

Building upon previous research on Digital Light Projection (DLP) 3D printing for microfluidics, in this thesis I performed the detailed design and fabrication of a novel DLP 3D printer to increase resolution and device footprint flexibility. This new printer has a pixel resolution twice that of our group’s previous printers (3.8 μm vs 7.6 μm). I demonstrated a new state of the art for minimum channel width, reducing the minimum width to 15 μm wide (and 30 μm tall). This is an improvement over the previous smallest width of 20 μm. This printer also has the capacity to perform multiple …

Investigations Into Pressure Profile And Pressure Control In Wrist-Worn Health Monitoring Devices, Roger Mcallister Black

Theses and Dissertations

To aid in the design of future wearable health devices (WHDs), contact pressure between the distal forearm (wrist) and two different wrist-worn devices was investigated in this work. The first device included eight force sensors arranged in series along the length of a wristband to measure the pressure profile. The band also included a tensioner device for manually tightening the band while on a wrist. Testing was done on dummy wrists and the results were statistically significant supporting the hypothesis that areas of the wrist with lower radius of curvature will experience higher contact pressures generally and a faster rate …

Comparison Of Predicted And Measured Annual Performance Of A Roof-Top Grid-Connected Pv System In The Irish Climate, Chibuisi Chinasaokwu Okorieimoh, Brian Norton Prof, Michael Conlon Prof

Conference Papers

The problem of energy scarcity has reached a global scale as a result of the majority of energy production relying on non-renewable sources of energy. Solar photovoltaic cells use the photovoltaic effect to convert solar energy into electrical energy. Solar energy can reduce emissions of carbon dioxide (CO₂) associated with the generation from fossil fuels as the only CO₂ emissions are those embodied in their manufacture. A 268.8 m² area roof-top grid-connected PV system with a total capacity of 49.92kW_p was installed at Warrenpoint (54.11^oN and 6.26^oW) in Ireland. 192 “Renesola” …

Vibrating Flexoelectric Micro-Beams As Angular Rate Sensors, Yilin Qu, Feng Jin, Jiashi S. Yang

Department of Mechanical and Materials Engineering: Faculty Publications

We studied flexoelectrically excited/detected bending vibrations in perpendicular directions of a micro-beam spinning about its axis. A set of one-dimensional equations was derived and used in a theoretical analysis. It is shown that the Coriolis effect associated with the spin produces an electrical output proportional to the angular rate of the spin when it is small. Thus, the beam can be used as a gyroscope for angular rate sensing. Compared to conventional piezoelectric beam gyroscopes, the flexoelectric beam proposed and analyzed has a simpler structure.

Charger Robotic Air Hockey-Modified Air Hockey Table Featuring Automated Play Against A Human Opponent, Robert Geren

Honors Capstone Projects and Theses

No abstract provided.

Design And Characterization Of Phased Arrays For Uas Detection And Tracking, David Buck

Theses and Dissertations

This work continues the development of phased array radar for UAS detection and tracking. The earlier 1D scanning, 4 channel BYU SAA radar is improved upon and replicated to form a network of radars. These are shown to work together for higher level tracking across multiple fields of view. Additionally, a new phased array instrument is designed and constructed with 16 channels, 2D scanning, and improved signal processing algorithms. Preliminary metrics and field results show the operation of this sensor. A new technique for measuring array mutual impedances from embedded element patterns is developed here. This technique uses an antenna …

Vibrating Flexoelectric Micro-Beams As Angular Rate Sensors, Yilin Qu, Feng Jin, Jiashi S. Yang

Department of Mechanical and Materials Engineering: Faculty Publications

We studied flexoelectrically excited/detected bending vibrations in perpendicular directions of a micro-beam spinning about its axis. A set of one-dimensional equations was derived and used in a theoretical analysis. It is shown that the Coriolis effect associated with the spin produces an electrical output proportional to the angular rate of the spin when it is small. Thus, the beam can be used as a gyroscope for angular rate sensing. Compared to conventional piezoelectric beam gyroscopes, the flexoelectric beam proposed and analyzed has a simpler structure.

2022 Technical Program, Inspire - University Transportation Center

INSPIRE-UTC Annual Meetings

INSPIRE University Transportation Center 2022 Annual Meeting
August 1-2, 2022

Laying The Foundation For Education 4.0: Access, Value And Accountability, Jennifer Karlin, L. Eric James, Lauren Singelmann, Dan Ewert

Integrated Engineering Department Publications

The complexity of the global problems engineers are working to solve has long been discussed in both engineering and engineering education circles. The Grand Challenges for Engineering are grand because of the complexity of the challenges. While the challenges stand over a decade later, the speed at which the terms in which they are described, the shift from Industry 3.0 to Industry 4.0, has been slow. As the world becomes more deeply connected, as the internet of things becomes more commonplace in all parts of our lives, as technologies like machine learning and cyber physical systems become accessible to even …

A Multi-Decade Response To The Call For Change, Bart Johnson, Ron Ulseth, Mike Raich

Integrated Engineering Department Publications

Engineering and society have always been intertwined, especially with the accepted realization of technology's significant and rapidly increasing influence on the evolution of society. As a profession, engineering has a vital role in sustainably meeting needs and exploring opportunities that are ever changing and evolving. As societal and industry needs have evolved, engineering education itself has raised the call several times for evolving the way engineers are educated; however, the recent history of engineering education is, overall, one of missed opportunities. This was brought to a headline recently as ASEE leadership authored an article entitled “Stuck in 1955, Engineering Education …

“But I’M Not An Engineer”… Collaboration Between A Librarian And An Upper Division Project-Based Engineering Program, Rebecca Bates, Robert Sleezer, Heidi J. Southworth

Integrated Engineering Department Publications

Since 2013, a librarian at Minnesota State University, Mankato has collaborated with faculty and students in an upper division project-based engineering program. While having several years of experience in university libraries plus advanced degrees in history, the librarian had a limited background in science, engineering, and technology, and lacked a formal engineering degree. At first glance, this match may appear to be a recipe for failure. Indeed, in those first few years, the librarian’s angst about the missing engineering degree caused many sleepless nights of worry and concern. However, there came a time when the words “but I am not …

A Community Framing Of Integrated Engineering, Rebecca Bates, Susan Lord, Emanuela Tilley, Jenna Carpenter

Integrated Engineering Department Publications

The term “integrated engineering” is being used in new education programs. As a framing concept, we believe it has value for the wider engineering education community. A small group of program heads has facilitated conversations about how integrated engineering could benefit other programs and the community in general. This paper provides background and describes some of the outcomes of past conversations with the goal of including more voices in the conversation and initializing the formal use of integrated engineering as a prompt for improving engineering education.

Power And Voltage Modelling Of A Proton-Exchange Membrane Fuel Cell Using Artificial Neural Networks, Tabbi Wilberforce, Mohammad Biswas, Abdelnasir Omran

Mechanical Engineering Faculty Publications and Presentations

A proton exchange membrane fuel cell (PEMFC) is a more environmentally friendly alternative to deliver electric power in various applications, including in the transportation industry. As PEMFC performance characteristics are inherently nonlinear and involved, the prediction of the performance in a given application for different operating conditions is important in order to optimize the efficiency of the system. Thus, modelling using artificial neural networks (ANNs) to predict its performance can significantly improve the capabilities of handling the multi-variable nonlinear performance of the PEMFC. However, further investigation is needed to develop a dynamic model using ANNs to predict the transient behavior …

What Do Undergraduate Engineering Students At The Onset Of Emergency Hybrid Learning During Covid-19 Say About Peer Mentorship?, Darcie Christensen, Idalis Villanueva

Integrated Engineering Department Publications

This complete research paper addresses the perceptions of undergraduate engineering students during the onset of the worldwide pandemic (COVID-19) in an engineering college at a western institution of the United States. Specifically, these students were asked about their perceived needs around peer mentorship amidst pivoting between hybrid and in-person learning at the onset of COVID-19.

Mentorship is defined as the interaction between two individuals whose goal is to help one another in psychosocial matters, support personal and professional growth, and provide career guidance. Generally, there are two main types of mentorships recognized: traditional and peer. Traditional mentorship involves a mentor …

Energy Consumption Analysis Using Measured Data From A Net-Zero Energy Commercial Building In A Cold And Dry Climate, Sukjoon Oh, John F. Gardner

Mechanical and Biomedical Engineering Faculty Publications and Presentations

Zero-energy buildings have a critical role in reducing global energy use and greenhouse gas emissions. However, few studies have analyzed net-zero energy commercial buildings using measured energy use such as whole-building level and end-use level data. This paper presents an energy consumption analysis for the first net-zero energy commercial building in Idaho, U.S., in a cold and dry climate using measured end-use data from this building as well as measured whole-building energy use. Monthly bill data analysis, end-use data analysis, and Energy Use Intensity (EUI) analysis were conducted. The combined analysis of this study shows that the HVAC system was …

Llam-Mdcnet For Detecting Remote Sensing Images Of Dead Tree Clusters, Zongchen Li, Ruoli Yang, Weiwei Cai, Yongfei Xue, Yaowen Hu, Liujun Li

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Clusters of dead trees are forest fires-prone. To maintain ecological balance and realize its protection, timely detection of dead trees in forest remote sensing images using existing computer vision methods is of great significance. Remote sensing images captured by Unmanned aerial vehicles (UAVs) typically have several issues, e.g., mixed distribution of adjacent but different tree classes, interference of redundant information, and high differences in scales of dead tree clusters, making the detection of dead tree clusters much more challenging. Therefore, based on the Multipath dense composite network (MDCN), an object detection method called LLAM-MDCNet is proposed in this paper. First, …

Building Partnerships To Bridge The Transfer Gap And Increase Student Success, Cody Mann, Andrew Hanegmon, Anthony Venditto, Katherine Ulseth, Frankie Wood-Black, Liz Cox, Michelle Soledad

Integrated Engineering Department Publications

Transfer partnerships continue to be one of the most critical elements of student success. The purpose of this paper is to highlight the bridges and transfer gaps from a two-year college to a university and respect the value of the support and knowledge students are currently receiving at their community college, from the context of the practices and experiences of Iron Range Engineering - Bell. The transfer process, afterall, can be daunting to some students who plan to transition from a community college to a university to finish a Bachelor’s degree. Iron Range Engineering - Bell is a unique, co-op …

Engineering Stress Culture In Project-Based Engineering Programs, Lin Chase, Catherine Sleezer, Robert Sleezer, Michelle Soledad

Integrated Engineering Department Publications

Background: This research paper examines engineering stress culture in the context of project-based learning engineering programs at the university level. Multiple authors have reported that the culture of engineering and engineering education can be stressful and exclusive. A study conducted by Jensen and Cross [9] found that measures of inclusion such as "Department Caring" and "Department Pride" were negatively correlated with stress, anxiety, and depression. We used the approach developed by Jensen and Cross to examine stress culture in the context of three project-based learning engineering programs.

Purpose: Our goal was to establish a baseline of measures of mental health …

A Numerical Thermal Analysis Of A Battery Pack In An Electric Motorbike Application, Mohammad Shahjalal, Tamanna Shams, Sadat Bin Hossain, Probir Kumar Roy, Arafat Alam Jion, Mominul Ahsan, Jahedul Islam Chowdhury, Md Rishad Ahmed, Syed B. Alam, Julfikar Haider

Nuclear Engineering and Radiation Science Faculty Research & Creative Works

Today, electric driven motorbikes (e-motorbikes) are facing multiple safety, functionality and operating challenges, particularly in hot climatic conditions. One of them is the increasing demand for efficient battery cooling to avoid the potential thermal stability concerns due to extreme temperatures and the conventional plastic enclosure of the battery pack. A reliable and efficient thermal design can be formulated by accommodating the battery within an appropriate battery housing supported by a cooling configuration. The proposed design includes a battery pack housing made of high conductive materials, such as copper (Cu) and aluminum (Al), with an adequate liquid cooling system. This study …

Professional And Organizational Leadership Role In Ethics Management: Avoiding Reliance On Ethical Codification And Nurturing Ethical Culture, Islam H. El-Adaway, Marianne Jennings

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

The engineering profession has experienced some ethical cases that were rarely reported, scrutinized, or discussed because: they did not necessarily represent violations of existing codes even if they breached ethical principles; those within the organization were not prepared to take steps to address the issues or impose sanction; an/or some of the personnel associated with these cases resorted to silence to avoid being labeled as trouble-makers in their organizations and, perhaps, more broadly, in society. The goal of this paper is to heighten managerial awareness of ethical issues, interrelated ethical lapses, and appropriate responsive actions within professional engineering communities. As …

Smart Spine Tape: Active Wearable Posture Monitoring For Prevention Of Low Back Pain And Injury, Samuel J. Borda

Master's Theses

Back pain and injury are a global health issue and are a leading cause of work and activity absence. Prevention would not only save those affected from the burden of pain and discomfort, but would also save people from loss of over 290 million workdays annually and save the healthcare system billions of dollars in expenses per year. Successful research and development of a wearable technology capable of comprehensively monitoring spinal postures that are leading causes of back pain and injury can result in prevention of mild to severe back pain and injury for high-risk people. To accomplish this, the …

Examination Of Ableist Educational Systems And Structures That Limit Access To Engineering Education Through Narratives, Marissa Tsugawa, Brady Webster, Sakshi Solanki, Autumn Cuellar, Catherine Mcgough Spence

Integrated Engineering Department Publications

The purpose of this paper is to examine how higher education systems limit access to engineering education for disabled and neurodivergent engineering students. Throughout this paper we will discuss ableism in higher education systems. Particularly, U.S. institutions and education are designed for non-disabled and neurotypical people rather than with accessibility for all despite legal efforts to improve access to education. We also provide two narratives from the authors that describe their experiences with having a disability and being neurodivergent in engineering education. Finally, we suggest other paradigms and methodologies engineering education researchers can utilize when conducting research on disability and …

Byoe: Making Connections Between Fluid Mechanics And Abstract Painting, Thomas Shepard, Charles Mossey, Jacob Swanson, Colin Huntington, Mary Murphy

Integrated Engineering Department Publications

This bring your own experiment (BYOE) paper details two iterations of a hands-on painting project that has been well-received by fluid mechanics students. In the conception of this project the authors have explored many of the relevant parameters for different painting techniques: drip painting, pendulum painting spray painting, and acrylic pours – one subset of which is spinning pours. These methods were explored both in terms of relevant fluid mechanic phenomenon as well as with hands-on experimentation, reviewing instructional videos and talking with artists. These efforts led to creation of short instructional videos that students can watch before undertaking their …

Temporal Lidar Scanning In Quantifying Cumulative Rockfall Volume And Hazard Assessment: A Case Study At Southwestern Saudi Arabia, Abdullah A. Alotaibi, Norbert H. Maerz, Kenneth J. Boyko, Ahmed M. Youssef, Biswajeet Pradhan

Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works

Rockfalls and unstable slopes pose a serious threat to people and property along roads/highways in the southwestern mountainous regions of Saudi Arabia. In this study, the application of terrestrial light detection and ranging (LiDAR) technology was applied aiming to propose a strategy to analyze and accurately depict the detection of rockfall changes, calculation of rockfall volume, and evaluate rockfall hazards along the Habs Road, Jazan Region, Saudi Arabia. A series of temporal LiDAR scans were acquired at three selected sites. Our results show that these three sites have different degrees of hazard due to their geological differences. The mean volume …

Out-Of-Plane Load-Bearing And Mechanical Energy Absorption Properties Of Flexible Density-Graded Tpu Honeycombs, Ibnaj Anamika Anni, Kazi Zahir Uddin, Nicholas Pagliocca, Nand Singh, Oyindamola Rahman, George Youssef, Behrad Koohbor

Henry M. Rowan College of Engineering Departmental Research

Honeycomb structures are widely used in applications that require excellent strain energy mitigation at low structural weights. The load-bearing and energy absorption capacity of honeycomb structures strongly depend on their cell wall thickness to edge ratios. This work studies the mechanical response and strain energy absorption characteristics of hexagonal honeycomb structures with various cell wall thicknesses in response to out-of-plane loading conditions. Honeycomb structures with various nominal densities are first additively manufactured from flexible thermoplastic polyurethane (TPU). A comprehensive experimental study characterized the mechanical strength, energy absorption performance, and the strain recoverability of the structures. Density-graded structures are then fabricated …

The Use Of Alkaline Co2 Solvent For The Co2 Curing Of Blast-Furnace Slag Mortar, Seong Ho Han, Yubin Jun, Jae Hong Kim

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Moving toward carbon neutrality in the construction industry involves utilizing CO₂ to produce construction materials. CO₂ curing of cement-based materials induces carbonation at an early age, which enhances strength and performance. A new process for the CO₂ curing is proposed using CO₂-dissolved curing water, which needs no massive CO₂-gas chamber encasing cement-based materials in mild pressure. Gaseous CO₂ was dissolved in 1 M aqueous KOH solution beforehand, and mortar samples made with ground-granulated blast furnace slag were submerged and cured. The CO₂-water curing for 3 days carbonated the samples but …

Complexity In The Classroom Workshop: Teaching And Learning The Cynefin Framework By Applying It To The Classroom, Jennifer Karlin, L. Eric James, Lauren Singlelmann

Integrated Engineering Department Publications

Complex adaptive systems are both an important fundamental principle in systems engineering education and a reality of all engineering education. The Cynefin framework, as created by Snowden and Boone (2007), is a decision-making tool that helps the engineer recognize the type of system within which they are operating and then respond in a manner that is appropriate for the cause-and-effect relationships associated with that system type. The types of system, or the domains, fall into five categories and their liminal spaces: obvious, where the cause-and-effect relationships are clear to everyone involved; complicated, where the cause-and-effect relationships are clear to those …

Recent Advances In Microwave Synthesis For Photoluminescence And Photocatalysis, Rajagopalan Krishnan, Sini Nanadath Shibu, Dirk Poelman, Ankush Kumar Badyal, Arup K. Kunti, Hendrik C. Swart, Samvit G. Menon

Cappa Publications

This review provides a comprehensive discussion on the microwave-assisted synthesis of various materials for photoluminescence and photocatalytic applications. In the past decade, because of its ability to synthesize nanomaterials through faster, cleaner and more cost-effective routes compared to conventional heating, microwave techniques have gained significant importance for the synthesis of metal oxides, fluorides, sulphides, and quantum dots. Additionally, due to the uniqueness of its heating mechanism, the synthesis of materials in various nanostructured forms through microwave-assisted methods has been of great interest and is widely pursued. The materials thus synthesized have been applied as sensing elements in gas sensors, luminescent …

Working Full Time And Earning An Engineering Degree: Wellbeing In A Co-Op-Based Engineering Program, Catherine Mcgough Spence, Luke Nyberg, Justine Chasmar, Jodi Nelson, Marissa Tsugawa

Integrated Engineering Department Publications

The purpose of this research paper is to describe how stress manifests in undergraduate engineering students who are working in paid engineering positions while completing their upper-division coursework, through the analysis of reflective prompts on wellbeing, and engineering belongingness. Previous research has identified the culture of “suffering and shared hardship” where heavy workloads and stressful situations are expected in engineering programs and engineering as a discipline. Stress, specifically feelings of being overwhelmed with workload, has far reaching implications for an individuals’ wellbeing beyond academic performance.

We focus on the frameworks of self-determination theory, engineering belonging, identity, to better understand undergraduate …