Engineering Commons^™

A Low Assembly Cost Coaxial Magnetic Gearbox, Kiran Uppalapati, Joshua Kadel, Jason Wright, Kang Li, Wesley Williams, Jonathan Bird

Electrical and Computer Engineering Faculty Publications and Presentations

This paper presents the design investigation and experimental testing of a flux-focusing magnetic gearbox with a three piece laminated rotor structure. Each rotor is made of a single lamination stack held together via thin lamination bridges. It is calculated that mechanical bridges reduces the torque density from 156Nm/L to 139Nm/L (a reduction of 11%). The experimentally measured torque density is shown to be only 95Nm/L because the magnets were demagnetized during testing.

Efficient Neighborhood Graph Construction For Sparse High Dimensional Data, David Anastasiu

Faculty Publications

No abstract provided.

Collective Nonaffine Displacements In Amorphous Materials During Large-Amplitude Oscillatory Shear, Nikolai V. Priezjev

Mechanical and Materials Engineering Faculty Publications

Using molecular dynamics simulations, we study the transient response of a binary Lennard-Jones glass subjected to periodic shear deformation. The amorphous solid is modelled as the three-dimensional Kob-Andersen binary mixture at a low temperature. The cyclic loading is applied to slowly annealed, quiescent samples, which induces irreversible particle rearrangements at large strain amplitudes, leading to stress-strain hysteresis and a drift of the potential energy towards higher values. We find that the initial response to cyclic shear near the critical strain amplitude involves disconnected clusters of atoms with large nonaffine displacements. In contrast, the amplitude of shear stress oscillations decreases after …

Remediating 1,4-Dioxane-Contaminated Water With Slow-Release Persulfate And Zerovalent Iron, Ann Kambhu, Megan Gren, Wei Tang, Steve D. Comfort, Clifford Harris

Nebraska Water Center: Faculty Publications

1,4-dioxane is an emerging contaminant that was used as a corrosion inhibitor with chlorinated solvents. Metal-activated persulfate can degrade dioxane but reaction kinetics have typically been characterized by a rapid decrease during the first 30 min followed by either a slower decrease or no further change (i.e., plateau). Our objective was to identify the factors responsible for this plateau and then determine if slow-release formulations of sodium persulfate and Fe⁰ could provide a more sustainable degradation treatment. We accomplished this by conducting batch experiments where Fe⁰-activated persulfate was used to treat dioxane. Treatment variables included the timing …

Learning From Engineers To Develop A Model Of Disciplinary Literacy In Engineering, Amy Wilson-Lopez

Funded Research Records

No abstract provided.

A Vertical Axis Wave Turbine With Hydrofoil Blades, Yingchen Yang, Isaiah Diaz, Sergio Soto Quintero

Mechanical Engineering Faculty Publications

This work discusses a new wave energy converter (WEC) design that, when deployed in waves, performs unidirectional rotation about a vertical shaft. The uniqueness of this new WEC design is on utilizing omnidirectional water flow generated by waves to drive a rotor to perform unidirectional rotation about a vertical axis. This unique feature circumvents the frequency-dependent issue of common WECs, and eliminate realignment needs to cope with dynamically changing wave propagation directions. The key component of the WEC is a rotor, which has a vertical shaft with a number of blades mounted to it. Each blade has a hydrofoil-shaped cross …

Comparative Performance Of Two Ventilation Strategies In A Hot-Humid Climate, Florida Solar Energy Center, Sarah Widder

FSEC Energy Research Center®

ASHRAE Standard 62.2, 'Ventilation and Indoor Air Quality in Low-Rise Buildings,' is the most commonly referenced residential ventilation standard in the United States. It is currently required by ENERGY STAR Version 3 (V3), the 2012 International Energy Conservation Code, the U.S. Department of Energy's Zero Energy Ready Home Program, many state weatherization programs, and many other home performance programs. The standard calls for ventilation levels that are perceived by some builders and contractors to cause indoor moisture issues in hot-humid climates unless mitigated by supplemental dehumidification systems, which increase overall energy consumption. Therefore, many high-performance home builders in a hot-humid …

Controlling Calcium Compound Formation In Biocompatible Materials For Tissue Regeneration And Repair In Mammals, Steven B. Jung, D. E. Day

Materials Science and Engineering Faculty Research & Creative Works

A biocompatible composition for tissue repair or regeneration in mammals comprising one or more glass former compounds selected from the group consisting of B₂O₃, P₂O₅, and SiO₂ and director elements selected from the group consisting of Cu, Sr, Zn, Fe, Mn, Cr, V, Nb, Mo, W, Ba, Co, S, Al, Ti, Y, Mg, Si and/or Ni to promote in vivo calcium compound formation of calcium carbonate or other calcium compounds other than hydroxyapatite. Upon direct application of the biocompatible composition to a mammalian host, calcium carbonate or other calcium compounds other …

Scaffold For Tissue Regeneration In Mammals, D. E. Day, Steven B. Jung, Roger F. Brown

Materials Science and Engineering Faculty Research & Creative Works

A three-dimensional scaffold with interconnected pores for repair of tissue comprising a scaffold body for structural support of the tissue scaffold, where the scaffold body comprises scaffold body components bonded to each other and made from component materials comprising about 40 to about 90 wt % B₂O₃, and two or more other oxides, wherein the scaffold body has a porosity between about 15 and about 90 vol %.

A Fault-Tolerant T-Type Multilevel Inverter Topology With Increased Overload Capability And Soft-Switching Characteristics, Jiangbiao He, Ramin Katebi, Nathan Weise, Nabeel Demerdash, Lixiang Wei

Electrical and Computer Engineering Faculty Research and Publications

he performance of a novel three-phase four-leg fault-tolerant T-type inverter topology is introduced in this paper. This inverter topology provides a fault-tolerant solution to any open-circuit and certain short-circuit switching faults in the power devices. During any of the fault-tolerant operation modes for these device faults, there is no derating required in the inverter output voltage or output power. In addition, overload capability is increased in this new T-type inverter compared to that in the conventional three-level T-type inverter. Such increase in inverter overload capability is due to the utilization of the redundant leg for overload current sharing with other …

Fast And Efficient Radio Resource Allocation In Dynamic Ultra-Dense Heterogeneous Networks, Chonggyu Niu, Yibing Li, Rose Qingyang Hu, Fang Ye

Electrical and Computer Engineering Faculty Publications

Ultra-dense network (UDN) is considered as a promising technology in 5G wireless networks. In an UDN network, dynamic traffic patterns can lead to a high computational complexity and an excessive communications overhead with traditional resource allocation schemes. In this paper, a new resource allocation scheme presenting a low computational overhead and a low subband handoff rate in a dynamic ultra-dense heterogeneous network is presented. The scheme first defines a new interference estimation method that constructs network interference state map, based on which a radio resource allocation scheme is proposed. The resource allocation problem is a MAX-K cut problem and can …

Bicp Global Bim Study - Lessons For Ireland’S Bim Programme, Barry Mcauley, Alan Hore, Roger West

Reports

The Construction IT Alliance (CitA) has been promoting the benefits of digitisation in the construction and engineering industry in Ireland since its formation back in 2002. Whilst the Alliance has always strived to ensure that its members are exposed to a wide spectrum of contemporary digital tools and processes, the concept of Building Information Modelling (BIM) has dominated the focus of its activities over the past five years.

BIM can be described as a digital tool that facilitates everybody to better understand a building or structure through the use of a digital model which draws on a range of data …

New-Generation Nasa Aura Ozone Monitoring Instrument (Omi) Volcanic So2 Dataset: Algorithm Description, Initial Results, And Continuation With The Suomi-Npp Ozone Mapping And Profiler Suite (Omps), Can Li, Nickolay A. Krotkov, Simon Carn, Yan Zhang, Robert J.D. Spurr, Joanna Joiner

Michigan Tech Publications, Part 1

Since the fall of 2004, the Ozone Monitoring Instrument (OMI) has been providing global monitoring of volcanic SO2 emissions, helping to understand their climate impacts and to mitigate aviation hazards. Here we introduce a new-generation OMI volcanic SO2 dataset based on a principal component analysis (PCA) retrieval technique. To reduce retrieval noise and artifacts as seen in the current operational linear fit (LF) algorithm, the new algorithm, OMSO2VOLCANO, uses characteristic features extracted directly from OMI radiances in the spectral fitting, thereby helping to minimize interferences from various geophysical processes (e.g., O3 absorption) and measurement details (e.g., wavelength shift). To solve …

A Multi-Institutional Approach To Delivering Shared Curricula For Developing A Next-Generation Energy Workforce, Lawrence E. Holloway, Zhihua Qu, Margaret J. Mohr-Schroeder, Juan Carlos Balda, Andrea Benigni, Donald G. Colliver, Paul A. Dolloff, Roger A. Dougal, M. Omar Faruque, Zongming Fei, Yuan Liao, Roy A. Mccann, R. Mark Nelms, Vijay P. Singh, Azadeh Vosoughi, Qun Zhou

Electrical and Computer Engineering Faculty Publications

In this paper, we consider collaborative power systems education through the FEEDER consortium. To increase students' access to power engineering educational content, the consortium of seven universities was formed. A framework is presented to characterize different collaborative education activities among the universities. Three of these approaches of collaborative educational activities are presented and discussed. These include 1) cross-institutional blended courses (“MS-MD”); 2) cross-institutional distance courses (“SS-MD”); and 3) single-site special experiential courses and concentrated on-site programs available to students across consortium institutions (“MS-SD”). This paper presents the advantages and disadvantages of each approach.

A Dual-Modality System For Both Multi-Color Ultrasound-Switchable Fluorescence And Ultrasound Imaging, Jayanth Kandukuri, Shuai Yu, Bingbing Cheng, Venugopal Bandi, Francis D’Souza, Kytai Truong Nguyen, Yi Hong, Baohong Yuan, Jamal Zweit

Bioengineering Faculty Publications - Archive

Simultaneous imaging of multiple targets (SIMT) in opaque biological tissues is an important goal for molecular imaging in the future. Multi-color fluorescence imaging in deep tissues is a promising technology to reach this goal. In this work, we developed a dual-modality imaging system by combining our recently developed ultrasound-switchable fluorescence (USF) imaging technology with the conventional ultrasound (US) B-mode imaging. This dual-modality system can simultaneously image tissue acoustic structure information and multi-color fluorophores in centimeter-deep tissue with comparable spatial resolutions. To conduct USF imaging on the same plane (i.e., x-z plane) as US imaging, we adopted two 90 -crossed ultrasound …

Design Of A Practice Fundamentals Of Engineering Exam For Undergraduate Biomedical Engineering Students, Matthew J. A. Rickard, Seung-Jae Kim, Mark Gordon, Seong Deok Kong, Peter Havrisik

Biomedical Engineering Western Regional Conference

KEYWORDS:

Biomedical Engineering Undergraduate Bioengineering Fundamentals Exam FE standardized test

Differentiation Of Kidney Progenitors Using Induced Pluripotent Stem Cells And Conditioned Media Of Renal Cortical Tubular Epithelial Cells, Matthew Nielsen 3644978, Steven Passey, Maxwell Beers, Alonzo Cook

Biomedical Engineering Western Regional Conference

No abstract provided.

Skin Strain Measurement To Predict Knee Joint Angles Through Nanocomposite Stain Gauges, Adin Martineau, James Tracy, Gavin Collins, Parker Rosquist, Dustin A. Bruening, Matt K. Seeley, David T. Fullwood, Anton E. Bowden

Biomedical Engineering Western Regional Conference

Explores the possibility of using high deflection nanocomposite strain gauges as knee joint angle sensor.

Dual Mechanism For Toughening And Sustained Aminoglycoside Elution From A Polyphosphate Hydrogel, Dwight D. Lane, Russell J. Stewart Phd

Biomedical Engineering Western Regional Conference

No abstract provided.

Redesign Of Computer Keyboards For Hospital And Consumer Use, Kent Williams, Brian Jensen, Anton Bowden

Biomedical Engineering Western Regional Conference

Application of carbon nanotube coatings to computer keyboards in order to reduce the spread of bacteria in hospitals and homes.

Keywords: carbon nanotube, bacteria, antimicrobial, keyboard, design, MRSA, biofilm

Soft-Tissue Artifact Compensation For Electromagnetic Motion Capture, George T. Dickinson, Steven K. Charles

Biomedical Engineering Western Regional Conference

This purpose of this study is to develop a soft-tissue artifact compensation algorithm for the upper arm using electromagnetic motion capture systems that can be implemented in a wide range of applications. This study focuses on compensation of humeral axial rotation and forearm axial rotation.

The Sub-Chronic Vascular Response To Water-Borne Embolic Coacervates., Joshua P. Jones, Monika Sima, Russell J. Stewart

Biomedical Engineering Western Regional Conference

Water-borne coacervates that solidify in response to decreasing ionic strength have been developed as an agent for small vessel transcatheter embolization. Here, the sub-chronic vascular response to these agents will be presented. Embolic coacervates demonstrated a benign foreign body response, which supported tissue ingrowth and stabilized vessel occlusion out to 28 days. As with other liquid embolics, occlusion is dependent upon mechanical obstruction of the vessel and native thrombus. Over time, the thrombus becomes more organized by fibroblasts. Continuation of the processes seen at 28 days will likely result in fibrous encapsulation of the embolic coacervate, further stabilizing the occlusion.

Serum Comp And The Inflammatory Environment Of The Knee Before And After Exercise-Induced Load, Alyssa Evans, Robert D. Hyldahl, Sarah T. Ridge, Sunku Kwon, Ty J. Hopkins, Eric R. Robinson, Matthew K. Seeley

Biomedical Engineering Western Regional Conference

The purpose of this study was to determine how accurately serum COMP represents inflammatory cytokine levels, within the knee, before and after exercise.

Cytokines included: GM-CSF, IFNa2, IL-10, IL-12p40, IL-13, IL-15, IL-1ra, IL1b, IL1a, IL-4, IL-6, IL-8, IP-10, MCP-1, MIP-1a, MIP-1b and IL-17.

Characterization Of Essential Tremor In The Major Degrees Of Freedom Of The Upper Limb, Adam Pigg, David Standring, Steven Charles

Biomedical Engineering Western Regional Conference

No abstract provided.

Simulation Of Tremor Propagation In The Upper Limb, Thomas Corie, Steven K. Charles Dr

Biomedical Engineering Western Regional Conference

Essential tremor (ET) is the most common movement disorder and is estimated to affect between 1 and 12 million people in the US. Our long-term goal is to develop effective wearable tremor-suppressing devices. To reach this goal, we must first understand how tremor propagates from its mechanical origin (muscle) to the hand, where it matters most. The purpose of the current work is to characterize the extent to which tremor in different muscles or muscle groups contributes to tremor at the hand.

Differentiation And Containment Of Derived Pancreatic Beta Cells, Caden Duffy, Alonzo Cook Ph.D.

Biomedical Engineering Western Regional Conference

Currently, the only permanent cure for Type 1 Diabetes is a pancreatic or islet transplant. With the shortage of donors, we are progressing research towards alternative therapies by differentiating induced pluripotent stem cells into derived pancreatic β-cells that can be transplanted and used as treatment for Type 1 Diabetes. We are investigating methods to increase the yield of fully derived, insulin producing pancreatic β-cells and are additionally researching the use of hydrophilized expanded polytetrafluoroethylene for use in cell containment devices. These devices could offer a future alternative for islet transplantation in human patients.

Beating Human Induced Pluripotent Stem Cell-Derived Cardiomyocytes On Porcine Extracellular Matrix, Kaitlyn J. Mcentire, Alonzo Cook, Toph Knutson, Gevan Eldredge, Hunter Behrmann, Clayton Holding, Matthew Hodgson, Dillon Despain, Jacob Preslar, Joseph Rich, Matthew Stephens, Matthew Trone, Michael Neff, Sam Worrall, Joshua Mcclellan, Abbie Kondel, Donnie Pfeifer

Biomedical Engineering Western Regional Conference

Despite modern technology and developments in heart disease treatment and prevention, heart disease remains the number one cause of death in America. With an inability to meet an ever-increasing demand for heart transplants and the dangers of immunosuppressant drugs, any potential alternative to cardiac transplantation must be pursued. The end goal of this research is to engineer biocompatible tissues that are fully functional to repair or replace damaged portions of the heart following the loss of cardiac function. This research investigates the effect of porcine extracellular matrix as the scaffold for beating IPS-differentiated cardiomyocytes.

Nerve Growth Factor And Lysophosphatidylcholine In Peripheral Nerve Repair, Keaton Karlinsey 8741888

Biomedical Engineering Western Regional Conference

NGF, Nerve Growth Factor, Lysophosphatidylcholine, Peripheral nerve regeneration, Sciatic nerve, Sciatic crush injury

Ocular Lens Engineering: A Regenerative Approach To Correcting Visual Impairments, Dallin Busby, Joshua Hansen, Cameron Crook, Diane Donaldson, Alonzo Cook

Biomedical Engineering Western Regional Conference

No abstract provided.

Computational Characterization Of Blood Vessel Strain In Wire Myography, Sameer S. Nandikar, M Converse, K L. Monson

Biomedical Engineering Western Regional Conference

Blood vessels, and the mechanical forces that act on them, play a key role in both health and disease. As a consequence, the mechanical properties of vessels have been under study for over a century. A variety of approaches have been used to define vessel properties, including stretching of vessel rings to study circumferential behavior, a configuration commonly used in wire myography. The objective of the present study was to develop a finite element model to quantify strains throughout a vessel ring during such loading.