Engineering Commons^™

Transformative And Disruptive Role Of Local Direct Current Power Networks In Power And Transportation Sectors, Prahaladh Paniyil, Rajendra Singh, Amir A. Asif, Vishwas Powar, Guneet Bedi, John Kimsey

Publications

The power sector is about to undergo a major disruptive transformation. In this paper, we have discussed the best possible energy solution for addressing the challenges of climate change and eradication of energy poverty. This paper focusses on the decentralized power generation, storage and distribution through photovoltaics and lithium batteries. It encompasses the need for local direct current (DC) power through the factors driving this change. The importance of local DC power in the transportation sector is also established. Finally, we conclude with data bolstering our argument towards the paradigm shift in the power network.

Printing 3d Models For Chemistry: A Step-By-Step Open-Source Guide For Hobbyists, Corporate Professionals, And Educators And Students In K-12 And Higher Education, Elisabeth Grace Billman-Benveniste, Jacob Franz, Loredana Valenzano-Slough

Open Access Books

3D-printing is a relatively inexpensive additive manufacturing method used to create tangible objects. As a relatively new technology, the true capability of 3D-printing has not yet been fully exploited, especially in academic and research/teaching settings. Through this work, 3D-printing in a classroom and research environment is employed as a tool for creation of fully customizable, three-dimensional molecular models and for the visualization of theoretical abstract concepts.

College Of Engineering And Applied Sciences 09/2019, College Of Engineering And Applied Sciences

College of Engineering and Applied Sciences News

• Passport Day Welcomes New Engineering and Applied Sciences Students
• Grad Helps Others Using Industrial Engineering Knowledge
• Say Hello to the WMU Alumni Association
• WMU Ranks No. 1 in Graduate Earnings
• WMU Among Recipients of $1M NSF Grant to Boost Women in Stem Fields
• Together, We Elevate: Invisible Need Project
• Mechanical Engineering Program is a Natural Fit
• Dr. Butt Named Interim Dean and Other CEAS News

Mech 234-003: Engineering Mechanics - Statics, G. Milano

Civil and Environmental Engineering Syllabi

No abstract provided.

Trends In Well-Being In Nonmetropolitan Nebraska: Nebraska Rural Poll Research Report 19-3, Rebecca Vogt, Cheryl Burkhart-Kriesel, Randolph Cantrell, Bradley Lubben, Timothy Meyer, Jason L. Weigle

Rural Futures Institute: Publications

Nebraska’s economy remained strong in the beginning of 2019. However, the continued weakness of the agriculture sector had the possibility of hampering the state’s economic growth. In addition, the March flooding had the potential for negative economic effects. Given these challenges, how do rural Nebraskans feel about their community? Are they satisfied with the services provided by their community? How do rural Nebraskans believe they are doing and how do they view their future? How satisfied are they with various items that influence their well-being? Have these views changed over the past 24 years? This paper provides a detailed analysis …

A Novel Method Of Using Iron Nanoparticles From Coal Fly Ash Or Ferric Chloride For Acid Mine Drainage Remediation, Crisanda Gilbert, Olushola S. Ayanda, Olanrewaju O. Fatoba, Godfrey Madzivire, Leslie F. Petrik

Mining Engineering Faculty Research & Creative Works

Iron nanoparticles (nano Fe) were extracted from coal fly ash (CFA) or ferric chloride (FeCl3) and used for acid mine drainage (AMD) remediation. Characterization was achieved by X-ray diffraction (XRD), X-ray fluorescence, scanning electron microscopy-energy dispersive spectroscopy (SEM–EDX), high resolution transmission electron microscopy (HRTEM), and the Braunaer–Emmet–Teller (BET) surface area determination. The HRTEM indicated good dispersion of the characteristic bead-like structure of nano Fe. It was also observed that the nano Fe were mainly in the zero-valent oxidation state, as denoted by the characteristic peak at ≈ 44.7° in the XRD analysis; it was accompanied by the generally accepted oxide …

Wind Tunnel Measurements And Data Analysis Tutorial, Nihad E. Daidzic

Aviation Department Publications

This tutorial gives details on processing of raw aerodynamic data measured directly in the wind tunnel on airfoils and wings. Also procedures and equations from the lab report are given and demonstrated how to compute geometric characteristics of wings/airfoils and air data. All numeric results are typically rounded to five significant digits.

A Techno-Economic Analysis Of Current Cooling Techniques In Irish Data Centres, Lee Gibbons, Bryan Coyne, David Kennedy, Sajad Alimohammadi

Articles

This research is part of a comprehensive study to determine reformative actions for cooling regimes within the Irish data centre market. To achieve this goal, preliminary Exergy, Entropy change and operational cost analyses are used. It is determined that there is no clear advantage for using one cooling method over another without knowing the data centres secondary function (e.g. district heating, energy generation). Air cooling technology is a good candidate for a highly reliable system due to the low exhaust temperatures of 30°C. Two-phase immersion is a possibility for economically viable data centres where operational costs are to be minimised, …

Predicting The Hardness Of Turf Surfaces From A Soil Moisture Sensor Using Iot Technologies, Ann Marie Mckeon

Other

In horseracing, “the going” is a term to describe the racetrack ground conditions. In Ireland presently, a groundskeeper or course clerk walks the racecourse poking it with a blackthorn stick, assesses conditions, and declares the going – it is a subjective measurement.

This thesis will propose using remote low-cost soil moisture sensors to gather high frequency data about the soil water content in the ground and to enable informed decisions to be made. This will remove the subjective element from the ground hardness, and look at the data in an objective way.

The soil moisture sensor will systematically collect high …

Measurement And Estimation Of The Equivalent Circuit Parameters For Multi-Mw Battery Systems, Oluwaseun M. Akeyo, Vandana Rallabandi, Nicholas Jewell, Dan M. Ionel

Power and Energy Institute of Kentucky Faculty Publications

This paper proposes and validates through simulations and measurements, a procedure for the determining the equivalent circuit parameters of large utility-scale batteries. It is considered that a large battery includes multiple cells connected in series and parallel, and therefore, its equivalent circuit can be represented as a series-parallel network of state of charge (SOC) dependent resistors and capacitors. Tests for determining these equivalent circuit parameters are proposed. These tests involve subjecting the battery energy storage system (BESS) to multiple charge and discharge cycles, while monitoring the terminal voltage and current response. A method for post-processing and analyzing the measurements in …

Image Based Recognition Of The Monuments In Prizren, Annea Futko

Theses and Dissertations

Image classification application has recently been covering a high number of research fields. In the other hand as the performance of the mobile devices is being updated day by day, the implementation of image recognition algorithms in them, is not only being trendy but very helpful in everyday tasks. With the automatic monument recognition, visiting a city is easy and fun. This application recognizes the captured monument, gives useful information and describes that particular landmark. In this thesis there are used four historical monuments of the city of Prizren, Kosovo. The images where taken specially for the research from the …

Teknologjia E Te (Turbinave Me Erë ) Dhe Lidhja Me Rrjetin Elektrik Shpërndarës, Rron Lenjani

Theses and Dissertations

Një ndër faktorët kryesorë të zhvillimit ekonomik të një vendi dhe ngritjes së mirëqenies së shoqërisë padyshim se është siguria e furnizimit me energji. Furnizimi me energji elektrike në Kosovë mbështetet pothuajse plotësisht në energjinë e prodhuar nga termocentralet (97%), përkatësisht Kosova për përmbushjen e nevojave të veta energjetike mbështetet ekskluzivisht në linjit, e kjo falë rezervave enorme që disponon vendi ynë. Megjithatë rezultatet e këtij sektori lënë për të dëshiruar, gjë e cila ndërlidhet me ekonominë e varfër të vendit. Sigurimi i furnizimit të qëndrueshëm, cilësor, të sigurtë dhe të pandërprerë me energji elektrike është një prej kushteve kryesore …

Gjenerimi I Energjisë Elektrike Me Sistemin Pv Për Konsumatorë Të Vegjël (5kw), Ferki Hyseni

Theses and Dissertations

Energjia është një ndër konceptet që dominon botën moderne. Ajo ka ndikimin bazë në shumë aspekte të jetës sonë, prandaj është tejet e rëndësishme t’i kushtohet rëndësi e veqantë kësaj tematike. Një ndër faktorët kryesorë të zhvillimit ekonomik të një vendi dhe ngritjes së mirëqenies së shoqërisë padyshim se është siguria e furnizimit me energji. Furnizimi me energji elektrike në Kosovë mbështetet pothuajse plotësisht në energjinë e prodhuar nga termocentralet (97%), përkatësisht Kosova për përmbushjen e nevojave të veta energjetike mbështetet ekskluzivisht në linjit, e kjo falë rezervave enorme që disponon vendi ynë. Megjithatë rezultatet e këtij sektori lënë për …

Aplikimi I Kallëpeve Në Ndërtimtari, Blend Humolli

Theses and Dissertations

Bazuar në faktin se betoni është një nga materialet më të përdorua në botën moderne, dhe kombinimi i tij me armaturë është pothuajse i pazëvendësueshëm në ndërtimin e strukturave, të paktën deri më tani, atëherë pashmangshmërisht se në ndërtimin e strukturave të tilla shfaqet nevoja e avancimit të kallëpeve. Për ti kuptuar më mirë këto sisteme të avancuara të kallëpimit duhet të bëhen hulumtime dhe studime të kohë pas kohëshme, në mënyrë që i tërë procesi i ndërtimit të zhvillohet njëkohësisht. Pra është një lidhje zingjirore e cila nuk duhet të shkëputet asesi. Pikërisht për këtë qëllim është bërë edhe …

Vetitë E Agregateve Dhe Përdorimi I Tyre Si Komponente E Betonit, Laureta Musliu

Theses and Dissertations

Ky punim ka si qëllim të jap një përshkrim të hollësishëm dhe më të qartë për materialin ndërtimor-Agregatin. Duke marrë thelbin nga literatura dhe publikime të ndryshme kamë punuar temën me titullin ‘’ Vetitë e Agregateve dhe Përdorimi i Tyre si Komponente e Betonit’’.

Me anë të këtij punimi individual kamë bërë përpjekje që të krijojë një udhëzues me një strukturë të përmbledhur duke treguar karakteristikat dhe përdorimin e agregateve si njërin prej komponentëve kryesor me përqindjen ( % )më të madhe në beton.

Për të njohur më mirë Agregatet duhen njohur vetitë e tyre të cilat janë në pajtueshmëri …

Shtresat E Asfaltit Në Konstruksione Rrugore, Kastriot Maliqaj

Theses and Dissertations

Ky punim kryesisht përbëhet nga mbledhja dhe shqyrtimi i literaturave të ndryshme që ndërlidhen me punimet e ndërtimin e infrastrukturës rrugore. Në shtjellimin e kësaj teme të punimit të diplomës jam shërbyer me metodën e analizës kërkimore dhe me metodën e hulumtimit, softverve të ndryshëm.

Kërkesat e komunikacionit rrugor për rrugët e ndërtuara dhe përshtatura ndaj kushtev për makina të shpejta dhe të rënda motorike, me nivel të madh shërbimi, shkallë sigurie dhe qëndrueshmëri të planifikuar, si dhe hulumtimet e deritanishme eksperimentale në fushën e teknologjisë për prodhimin e shtresave të asfaltit, në katër dekadat e kaluara kishin dhe Akoma …

Identifying Patients With Coronary Artery Disease Using Rest And Exercise Seismocardiography, Parastoo Dehkordi, Erwin P. Bauer, Kouhyar Tavakolian, Vahid Zakeri, Andrew P. Blaber, Farzad Khosrow-Khavar

Electrical Engineering Faculty Publications

Coronary artery disease (CAD) is the most common cause of death globally. Patients with suspected CAD are usually assessed by exercise electrocardiography (ECG). Subsequent tests, such as coronary angiography and coronary computed tomography angiography (CCTA) are performed to localize the stenosis and to estimate the degree of blockage. The present study describes a non-invasive methodology to identify patients with CAD based on the analysis of both rest and exercise seismocardiography (SCG). SCG is a non-invasive technology for capturing the acceleration of the chest induced by myocardial motion and vibrations. SCG signals were recorded from 185 individuals at rest and immediately …

Elementary School Student Development Of Stem Attitudes And Perceived Learning In A Stem Integrated Robotics Curriculum, Yu-Hui Ching, Dazhi Yang, Sasha Wang, Youngkyun Baek, Steve Swanson, Bhaskar Chittoori

Educational Technology Faculty Publications and Presentations

Robotics has been advocated as an emerging approach to engaging K-12 students in learning science, technology, engineering, and mathematics (STEM). This study examined the impacts of a project-based STEM integrated robotics curriculum on elementary school students’ attitudes toward STEM and perceived learning in an afterschool setting. Three elementary school teachers and 18 fourth to sixth graders participated in an eight-week-long program. Quantitative and qualitative data were collected and analyzed, and showed students’ attitudes toward math improved significantly at the end of the robotics curriculum. Three specific areas of learning were identified, including STEM content learning and connection, engagement and perseverance, …

Evaluation Of Guardrail Needs And Update Of Guardrail Rating Program, Brian K. Howell, William Nicholas Staats, Nancy Albright

Kentucky Transportation Center Research Report

The Kentucky Transportation Cabinet (KYTC) seeks to reduce the frequency of roadway departure crashes, which often prove fatal. Roadside barriers such as guardrail have proven effective at mitigating these crashes, however, the demand for installations is high throughout the state. KYTC must prioritize prospective guardrail locations to match available funds with the most critical, or unsafe, sites. The current guardrail rating program (GRP) was established in 1989 to identify and prioritize guardrail needs. Despite periodic updates, the existing program no longer meets the transportation industry’s safety guidelines and policies. The Kentucky Transportation Center (KTC) studied national and state guardrail practices …

Hydrodynamic And Total Dissolved Solids Model Of The Tigris River Using Ce-Qual-W2, Muhanned D. Al-Murib, Scott Wells

Civil and Environmental Engineering Faculty Publications and Presentations

The headwaters of the Tigris River basin in Iraq is controlled by Turkey due to a series of dams constructed over the last few decades. Since Total Dissolved Solids (TDS) in the Tigris River within Baghdad and downstream cities can reach 1000 mg/L exceeding both drinking water and irrigation guidelines, a hydrodynamic and water quality model, CE-QUAL-W2, of the river was developed to understand how changes in flow affect TDS downstream. A model of 880 km of the Tigris River from Mosul Dam to Kut Barrage including Tharthar Lake was constructed for 2009. Model development was challenging due to a …

Historical Changes In Lower Columbia River And Estuary Floods: A Numerical Study, Lumas Helaire, Stefan Talke, David A. Jay, Andrew Mahedy

Civil and Environmental Engineering Faculty Publications and Presentations

Over the past 150 years, the Lower Columbia River Estuary controlling depth has approximately doubled, the majority of historical wetlands and floodplain have been reclaimed, numerous infrastructure projects have altered and confined flow pathways, and significant natural and anthropogenic changes to the discharge hydrograph have occurred. To investigate the effect of these changes on tides, river slope, and flood water levels, we construct and validate numerical models that simulate flow over late nineteenth‐century and present‐day bathymetry. The models are validated using archival (1853–1877) and modern tide measurements throughout the Lower Columbia River Estuary and river stage measurements from the tidal …

Compact Endfire Coupled-Mode Patch Antenna With Vertical Polarization, Haozhan Tian, Lijun Jiang, Tatsuo Itoh

Electrical and Computer Engineering Faculty Research & Creative Works

Coupled-mode patch antenna (CMPA) is able to reform the beam by manipulating the phase of the fringing fields at the edges. In this paper, a method is proposed to realize endfire radiation with vertical polarization based on the concept of CMPA. Besides the phase controlled by the coupling, the asymmetric feeding introduces additional phase shift to one of the radiation slots, which makes the beam pointing to the forward endfire direction within the whole band. The ground of the antenna is truncated to be the same size of the top patch, which eliminates the undesired effect of the ground edge …

Output-Constrained Control Of Nonaffine Multiagent Systems With Partially Unknown Control Directions, Bo Fan, Qinmin Yang, Sarangapani Jagannathan, Youxian Sun

Electrical and Computer Engineering Faculty Research & Creative Works

In this paper, an output-constrained control algorithm is presented for the consensus control of a class of unknown nonaffine multiagent systems (MASs) with partially unknown control directions. Our contribution includes a step forward beyond the usual consensus stabilization result to show that the outputs of agents remain within user-defined time-varying constraints. To achieve the new results, an error transformation technique is established to generate an equivalent MAS from the original one. Stabilization and consensus of the transformed agent states ensure both the satisfaction of the time-varying constraints and the consensus of the original agent states. Based on the Nussbaum gain …

Tvs Devices Transient Behavior Modeling Framework And Application To Seed, Li Shen, Shubhankar Marathe, Javad Meiguni, Guangxiao Luo, Jianchi Zhou, David Pommerenke

Electrical and Computer Engineering Faculty Research & Creative Works

The transient behavior for four different types of TVS (non-snapback, snapback, spark gap, varistor) is modeled using the same modeling framework. By a 10 ns VF-TLP, the quasi-static I-V curve and the transient turn-on are captured and modeled in ADS. The models are applied in a SEED simulation to investigate the strengths and weaknesses of the modeling frame.

Measurement Of Adhesion Of Sternal Wires To A Novel Bioactive Glass-Based Adhesive, Varinder Pal Singh Sidhu, Mark R. Towler, Marcello Papini

Chemical and Biochemical Engineering Faculty Research & Creative Works

Stainless steel wires are the standard method for sternal closure because of their strength and rigidity, the simplicity of the process, and the short healing time that results from their application. Despite this, problems still exist with sternal stability due to micromotion between the two halves of the dissected and wired sternum. Recently, a novel glass-based adhesive was developed which, in cadaveric trials and in conjunction with wiring, was shown to restrict this micromotion. However, in order to avoid complications during resternotomy, the adhesive should adhere only to the bone and not the sternal wire. In this study, sternal wires …

An Application Of Sliding Mode Control To Model-Based Reinforcement Learning, Aaron Thomas Parisi

Master's Theses

The state-of-art model-free reinforcement learning algorithms can generate admissible controls for complicated systems with no prior knowledge of the system dynamics, so long as sufficient (oftentimes millions) of samples are available from the environ- ment. On the other hand, model-based reinforcement learning approaches seek to leverage known optimal or robust control to reinforcement learning tasks by mod- elling the system dynamics and applying well established control algorithms to the system model. Sliding-mode controllers are robust to system disturbance and modelling errors, and have been widely used for high-order nonlinear system control. This thesis studies the application of sliding mode control …

Cubesat Astronomy Mission Modeling Using The Horizon Simulation Framework, Alexander W. Johnson

Master's Theses

The CubeSat Astronomy Network is a proposed system of multiple CubeSat spacecraft capable of performing follow-up observations of astronomical targets of interest. The system is intended to serve as a space-borne platform that can complement existing systems utilized for astronomical research by undergraduate and high school students. Much research and development work has been performed to develop model-based system engineering methodologies and products for CubeSat missions, including the Horizon Simulation Framework. The Horizon Simulation Framework enables the development of system models using the Extended Markup Language (XML), and its simulation program can generate system simulations over model-specified timespans. System requirements …

Structure And Reactivity Of Single Site Ti Catalysts For Propylene Epoxidation, Zheng Lu, Xiaoyang Liu, Bin Zhang, Zhuoran Gan, Siwen Tang, Lu Ma, Tianpin Wu, George J. Nelson, Yong Qin, Heath C. Turner, Yu Lei

PRC-Affiliated Research

Propylene epoxidation using molecular oxygen and hydrogen mixture on Au-based catalysts has attracted attention because of high propylene oxide selectivity and the use of an inexpensive and environmental friendly oxidant. Single-site titanium on metal oxide supports plays an important role in achieving high reactivity and selectivity in propylene epoxidation. Here we used TiO2 atomic layer deposition (ALD) to synthesize single-site titanium imbedded in the SiO2 framework for propylene epoxidation. High temperature calcination was used as post-treatment to control the titania structure and Tisingle bondO coordination number. Using UV–vis spectroscopy and X-ray absorption spectroscopy, we successfully established that under similar propylene …

Structure And Reactivity Of Single Site Ti Catalysts For Propylene Epoxidation, Zheng Lu, Xiaoyang Liu, Bin Zhang, Zhuoran Gan, Siwen Tang, Lu Ma, Tianpin Wu, George J. Nelson, Yong Qin, Heath C. Turner, Yu Lei

PRC-Affiliated Research

Propylene epoxidation using molecular oxygen and hydrogen mixture on Au-based catalysts has attracted attention because of high propylene oxide selectivity and the use of an inexpensive and environmental friendly oxidant. Single-site titanium on metal oxide supports plays an important role in achieving high reactivity and selectivity in propylene epoxidation. Here we used TiO2 atomic layer deposition (ALD) to synthesize single-site titanium imbedded in the SiO2 framework for propylene epoxidation. High temperature calcination was used as post-treatment to control the titania structure and Tisingle bondO coordination number. Using UV–vis spectroscopy and X-ray absorption spectroscopy, we successfully established that under similar propylene …

On The Optimal Energy Controls For Large Scale Residential Communities Including Smart Homes, Huangjie Gong, Vandana Rallabandi, Michael L. Mcintyre, Dan M. Ionel

Power and Energy Institute of Kentucky Faculty Publications

Residences with smart home energy management (HEM) systems and solar generation are modifying domestic load profiles. Moreover, the growing penetration of solar photovoltaic (PV) energy brings the total net power demand further down as houses become local generators. High PV penetration introduces technical challenges for the power system including the "duck curve". This paper proposes a co-simulation framework for high PV penetration smart energy communities which allows the simultaneous simulation of home energy consumption along with control algorithms for each house, as well as system power flow. Models are developed and presented for one of the largest rural field demonstrators …