Engineering Commons^™

Electromagnon Excitation In Cupric Oxide Measured By Fabry-Pérot Enhanced Terahertz Mueller Matrix Ellipsometry, Sean Knight, Dharmalingam Prabhakaran, Christian Binek, Mathias Schubert

Christian Binek Publications

Here we present the use of Fabry-Pérot enhanced terahertz (THz) Mueller matrix ellipsometry to measure an electromagnon excitation in monoclinic cupric oxide (CuO). As a magnetically induced ferroelectric multiferroic, CuO exhibits coupling between electric and magnetic order. This gives rise to special quasiparticle excitations at THz frequencies called electromagnons. In order to measure the electromagnons in CuO, we exploit single-crystal CuO as a THz Fabry-Pérot cavity to resonantly enhance the excitation’s signature. This enhancement technique enables the complex index of refraction to be extracted. We observe a peak in the absorption coefficient near 0.705 THz and 215 K, which corresponds …

Mid-Infrared Optical Sensing Using Sub-Wavelength Gratings, Brian Hogan, Liam Lewis, Michael Mcauliffe, Stephen P. Hegarty

Cappa Publications

Optical sensing has shown great potential for both quantitative and qualitative analysis of compounds. In particular sensors which are capable of detecting changes in refractive index at a surface as well as in bulk material have received much attention. Much of the recent research has focused on developing technologies that enable such sensors to be deployed in an integrated photonic device. In this work we demonstrate experimentally, using a sub-wavelength grating the detection of ethanol in aqueous solution by interrogating its large absorption band at 9.54 µm. Theoretical investigation of the operating principle of our grating sensor shows that in …

Electrical & Computer Engineering News, Georgia Southern University

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

• Dr. Rami Haddad Recognized at the GS Greek Awards

Increasing Salt Rejection Of Polybenzimidazole Nanofiltration Membranes Via The Addition Of Immobilized And Aligned Aquaporins, Priyesh Ashokrao Wagh, Xinyi Zhang, Ryan Blood, Peter M. Kekenes-Huskey, Prasangi Rajapaksha, Yinan Wei, Isabel C. Escobar

Chemical and Materials Engineering Faculty Publications

Aquaporins are water channel proteins in cell membrane, highly specific for water molecules while restricting the passage of contaminants and small molecules, such as urea and boric acid. Cysteine functional groups were installed on aquaporin Z for covalent attachment to the polymer membrane matrix so that the proteins could be immobilized to the membranes and aligned in the direction of the flow. Depth profiling using x-ray photoelectron spectrometer (XPS) analysis showed the presence of functional groups corresponding to aquaporin Z modified with cysteine (Aqp-SH). Aqp-SH modified membranes showed a higher salt rejection as compared to unmodified membranes. For 2 M …

Mechanism Of Tricalcium Silicate Hydration In The Presence Of Polycarboxylate Polymers, Rachel Cook, Hongyan Ma, Aditya Kumar

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Abstract: The early-age hydration of cement is inhibited in the presence of comb-shaped polycarboxylate ether (PCE) polymer -- a dispersant commonly added to control rheological properties of fresh cement paste. This study employs a series of microcalorimetry experiments and phase boundary nucleation and growth simulations to elucidate the effects of dosage and molecular architecture of PCE on hydration of tricalcium silicate (Ca₃SiO₅ or C₃S in cement notation), the dominant phase in cement. Results show that PCE -- regardless of its molecular architecture -- suppresses early-age hydration of C₃S. PCE-induced retardation becomes increasingly more …

Gis Framework For Spatiotemporal Mapping Of Urban Flooding, Sayed Joinal Hossain Abedin, Haroon Stephen

Civil and Environmental Engineering and Construction Faculty Research

This research aims to develop a framework using the Geographic Information System (GIS) to perform modeling and mapping of flood spatiotemporal variation in urban micro-watersheds. The GIS-framework includes a workflow of several methods and processes including delineation of urban watershed, generation of runoff hydrographs, and time series mapping of inundation depths and flood extent. This framework is tested in areas previously known to have experienced flooding at the University of Nevada, Las Vegas main campus, including Black Parking Lot (Blacklot) and East Mall. Calibration is performed by varying Digital Elevation Model (DEM) resolution, rainfall temporal resolution, and clogging factor whereas …

Model Predictive Automatic Control Of Sucker Rod Pump System With Simulation Case Study, Brigham Hansen, Brandon Tolbert, Cory Vernon, John Hedengren

Faculty Publications

This work enables accelerated fluid recovery in oil and gas reservoirs by automatically controlling fluid height and bottomhole pressure in wells. Several literature studies show significant increase in recovered oil by determining a target bottomhole pressure but rarely consider how to control to that value. This work enables those benefits by maintaining bottomhole pressure or fluid height. Moving Horizon Estimation (MHE) determines uncertain well parameters using only common surface measurements. A Model Predictive Controller (MPC) adjusts the stroking speed of a sucker rod pump to maintain fluid height. Pump boundary conditions are simulated with Mathematical Programs with Complementarity Constraints (MPCCs) …

Soil And Plant Moisture Monitoring Systems: Irrigation Consumer Bill Of Rights, Charles M. Burt

BioResource and Agricultural Engineering

Cal Poly ITRC, together with various irrigation industry leaders and the Irrigation Dealers Association of California, plus with assistance from the California Energy Commission and Pacific Gas & Electric Co., developed the Irrigation Consumer Bill of Rights (ICBR) in 1994.

Illuminator, Volume 2, Issue 6, Batten College Of Engineering & Technology, Old Dominion University

College of Engineering & Technology Newsletter

February 2019 issue of Illuminator, a monthly publication of ODU's Batten College of Engineering and Technology.

Evaluating Moisture Control Of Variable-Capacity Heat Pumps In Mechanically Ventilated, Low-Load Homes In Climate Zone 2a, Florida Solar Energy Center, Eric Martin

FSEC Energy Research Center®

The well-sealed, highly insulated building enclosures constructed by today's home building industry coupled with efficient lighting and appliances are achieving significantly reduced heating and cooling loads. These low-load homes can present a challenge when selecting appropriate space-conditioning equipment. Conventional, fixed-capacity heating and cooling equipment is often oversized for small homes, causing increased first costs and operating costs. Even if fixed-capacity equipment can be properly specified for peak loads, it remains oversized for use during much of the year. During these part-load cooling hours, oversized equipment meets the target dry-bulb temperatures very quickly, often without sufficient opportunity for moisture control. The …

Balancing The Performance And Environmental Concerns Of Used Motor Oil As Rejuvenator In Asphalt Mixes, Eslam Deef-Allah, Magdy Abdelrahman, Mark W. Fitch, Mohyeldin Ragab, Mousumi Bose, Xiaolong He

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Road deterioration inspires researchers to enhance the properties of asphalt binder for better performing mixes. Recycled tire rubber, or crumb rubber modifier (CRM), and used motor oil (UMO) are two modifiers that enhance asphalt binder performance through two different mechanisms. CRM affects high-temperature properties while UMO modifies low-temperature properties. Potential environmental concerns arising from the use of UMO have been raised in the literature. In this paper, the two recycled materials were investigated for their ability to complement each other. Both performance benefits of using both materials and the environmental concerns of using UMO were studied. Four CRM asphalt binders …

W&B For Far 23 Airplanes Tutorial, Nihad E. Daidzic

Aviation Department Publications

No abstract provided.

Discussion: Effect Of Bentonite Slurry Pressure On Interface Friction Of Pipe Jacking, Ciaran Reilly, Trevor Orr

Articles

Pipe jacking is a technique used to construct tunnels by pushing prefabricated pipes through the ground from an entrance shaft to an exit shaft. This technique is referred as microtunneling in U.S. terminology, therefore, in the rest of the text, pipejacking and microtunneling will be used as having the same meaning. Pipe jacking is a more economical alternative to segmental lined tunnels. However, the main limitation of pipe jacking is the jacking distance, which is directly dependent on the friction between the pipe and the soil. Therefore, reducing the friction between the pipe and soil is a critical issue in …

General: Irrigation Bill Of Consumer Rights, Charles M. Burt

BioResource and Agricultural Engineering

Cal Poly ITRC, together with various irrigation industry leaders and the Irrigation Dealers Association of California, plus with assistance from the California Energy Commission and Pacific Gas & Electric Co., developed the Irrigation Consumer Bill of Rights (ICBR) in 1994.

Drip/Micro Irrigation: Irrigation Consumer Bill Of Rights, Charles M. Burt

BioResource and Agricultural Engineering

Cal Poly ITRC, together with various irrigation industry leaders and the Irrigation Dealers Association of California, plus with assistance from the California Energy Commission and Pacific Gas & Electric Co., developed the Irrigation Consumer Bill of Rights (ICBR) in 1994.

Oiler For Vertical Pump Lineshaft Lubrication, Charles M. Burt

BioResource and Agricultural Engineering

This document provides technical advice for controlling the dripping of oil for oil-lubricated vertical lineshaft pumps for irrigation.

Power Flow-Conformal Metamirrors For Engineering Wave Reflections., Ana Díaz-Rubio, Junfei Li, Chen Shen, Steven A Cummer, Sergei A Tretyakov

Henry M. Rowan College of Engineering Departmental Research

Recently, the complexity behind manipulations of reflected fields by metasurfaces has been addressed, showing that, even in the simplest scenarios, nonlocal response and excitation of auxiliary evanescent fields are required for perfect field control. In this work, we introduce purely local reflective metasurfaces for arbitrary manipulations of the power distribution of reflected waves without excitation of any auxiliary evanescent field. The method is based on the analysis of the power flow distribution and the adaptation of the reflector shape to the desired distribution of incident and reflected fields. As a result, we find that these power-conformal metamirrors can be easily …

Inspire E-News 02 2019, College Of Engineering And Applied Sciences

College of Engineering and Applied Sciences News

• WMU included in $2.2 million state grant to enhance mobility for veterans
• Disruptive technology theme of Engineers Week Dinner
• Shrestha receives Fullbright award
• Paper engineers host student summit
• Area students get to "Dream Big"
• Printing organization provides scholarship
• Save the date to "Give a Slice"

Dynamic Light Scattering Optical Coherence Tomography To Probe Motion Of Subcellular Scatterers., Nico J J Arezza, Marjan Razani, Michael C Kolios

Medical Biophysics Publications

Optical coherence tomography (OCT) is used to provide anatomical information of biological systems but can also provide functional information by characterizing the motion of intracellular structures. Dynamic light scattering OCT was performed on intact, control MCF-7 breast cancer cells and cells either treated with paclitaxel to induce apoptosis or deprived of nutrients to induce oncosis. Autocorrelations (ACs) of the temporal fluctuations of OCT intensity signals demonstrate a significant decrease in decorrelation time after 24 h in both the paclitaxel-treated and nutrient-deprived cell groups but no significant differences between the two groups. The acquired ACs were then used as input for …

Preformed Partial Gel Injection Chased By Low-Salinity Waterflooding In Fractured Carbonate Cores, Ali K. Alhuraishawy, Baojun Bai, Mingzhen Wei, Abdullah Almansour

Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works

Fractures and oil-wet conditions significantly limit oil recovery in carbonate reservoirs. Gel treatment has been applied in injector wells to modify the prevailing reservoir streamlines and significantly reduce fracture permeability, whereas low-salinity waterflooding has been applied experimentally to modify rock wettability toward water-wet for improved oil recovery. However, both processes have limitations that cannot be resolved using a single method. The objective of this study was to test whether low-salinity water could enable gel particles to move deeply into fractures to efficiently increase oil recovery and control water production. A semitransparent fracture model of carbonate cores and acrylic plates was …

Towards Multi-Lingual Pneumonia Research Data Collection Using The Community-Acquired Pneumonia International Cohort Study Database, William A. Mattingly, Kimberley A. Buckner, Senen Pena

The University of Louisville Journal of Respiratory Infections

Background: Although multilingual interfaces are preferred by most users when they have a choice, organizations are often unable to support and troubleshoot problems involving multiple user languages. Software that has been structured with multiple languages and data interlinking considerations early in its development is more likely to be easily maintained. We describe the process of adding multilingual support to the CAPO international Cohort study database using REDCap.

Methods: Using Google Translate API we extend the supported Spanish language version of REDCap to the most recent version used by CAPO, 8.1.4. We then translate the English data dictionary for CAPO to …

W&B Problems For Far/Cs 25 Airplanes Tutorial, Nihad E. Daidzic

Aviation Department Publications

Weight and Balance (W&B) computations are essential step in ensuring that the aircraft (in this case FAR/CS 25 Transport-category airplanes) is properly loaded with its Center of Mass (CM) of Center of Weight/Gravity (CG) in the proper range.

Bartja Dhe Shpërndarja E Energjisë Elektrike Në Republikën E Kosovës, Berat Bajrami

Theses and Dissertations

Sektori i energjisë elektrike si një ndër sektorët më të rëndësishëm industrial në ekonominë e Kosovës, duhet të planifikohet dhe zhvillohet në mënyrë adekuate dhe në kohë. Rrjeti i bartjes dhe shpërndarjes luan rol të rëndësishëm në sistemin elektroenergjetik duke bërë të mundur bartjen dhe shpërndarjen e sasive të mëdha të energjisë elektrike nga gjeneratorët vendor dhe nga importet, deri te konsumatorët e mëdhenj dhe nyjet shpërndarëse. Zhvillimi i shoqërisë dhe ngritja e varësisë për energjinë elektrike kërkon rrjet të bartjes dhe shpërndarjes të sigurt, të besueshëm dhe efikas. Varësia në rritje për energji elektrike nënkupton që toleranca për ndërprerje …

Gjenerimi I Energjisë Elektrike Përmes Paneleve Fotovoltaike Të Lidhur Në Rrjetin Elektrik Shpërndarës, Agon Abazi

Theses and Dissertations

Energjia diellore është një nga burimet për perfitimin e energjisë elektrike, duke e pare gjithnje në rritje të konsumit dhe nevojen për energji elektrike, u deshtë të merren hapa konkret dhe investime të mëdha në këtë drejtim për përfitimin e energjisë elektrike nga energjia e riperteritshme qoftë nga dielli, energjia e erës dhe burime të tjera, duke e konsideru që me energji të riperteritshme nuk ka emetim dhe ndotje të ambientit. Nxitur nga zhvillimet e fundit teknologjike dhe shqetësimi në rritje për qëndrueshmërin dhe ndikimin mjedisor të përdorimit të karburantit konvencional, mundësia për të prodhuar energji të pastër dhe të …

Dimensionimi I Mbajtësit Linear Të Tipit Kapriatë, Misim Bela

Theses and Dissertations

Në këtë temë do të flasim për konstruksionet metalike, në veçanti për konstruksionet kapriatë të cilat janë të ndërtuara prej çeliku. Janë përshkruar karakteristikat e tyre, përdorimi i tyre, vetitë dhe tipet e konstruktimit, projektimi dhe dimensionimi i konstruksioneve metalike. Janë përshkruar edhe llojet e kapriatave, karakteristikat e tyre duke u bazuar në llojin e kapriatës në të cilat rolë shumë të rëndësishën luan hapësira e cila duhet të mbulohet në bazë të cilës përcaktohet lloji i kapriatës. Detyra kryesore e këtij punimi është projektimi i një kapriatë duke pasur parasysh hapësirën që do të mbulohet, llojet e ngarkesave, klasën …

Sanimi I Pjeseve Te Asfaltit Ne Temperatur E Te Ulet Te Dimirit, Gjyljeta Kabashi

Theses and Dissertations

Kërkesat e komunikacionit rrugor për rrugët e ndërtuara dhe të përshtatura ndaj kushteve për makinat e shpejta dhe të rënda motorike,me nivele më të mëdha shërbimi ,shkallë sigurie dhe qëndrueshmëri të planifikuar,si dhe hulumtimet e deritanishme eksperimentale në fushën e teknologjisë për prodhimin e asfaltit. Në katër dekadat e kaluara kishin dhe akoma kanë ndikim të konsiderueshëm në përmirësimin e koncepteve për projektimin dhe ndërtimin e rrugëve dhe aeroporteve, sidomos të konstruksioneve fleksibile rrugore.

Ndryshimet e tilla janë pasojë e zhvillimit dhe përkryerjes së prodhimit të mjeteve lidhëse nga bitumet rrugore të fituara gjatë proceseve të rafinimit te naftës në …

Organizimi Në Ndërtimtari, Rexhep Olluri

Theses and Dissertations

Ndërtimtaria është veprimtari specifike ekonomike që ka për synim ngritjen dhe rikonstruktimin e objekteve ndërtimore. Si veprimtari, ajo realizon produktin e caktuar, objektin ndertimor-arkitektonik. Ndërtimtaria veqohet për shkak të aktiviteteve të shumta që nevojiten për arritjen e një rezultati brenda një afati kohor. Secili aktivitet si proces teknologjik ka kohëzgjatjen e tij.

Varësisht nga natyra e projektit kemi:

• Aktivitete që kryhen në vartësi nga aktivitetet tjera paraprake
• Aktivitete të pavarura, që kryhen në të njejtën kohë me aktivitet tjera.

Planifikimi dhe strukturimi i aktiviteteve punuese në varësi të kohës quhet plan dinamik i punës. Paraqitja e aktiviteteve dhe kohëzgjatjes së …

Review Of Fiber Optic Sensors For Structural Fire Engineering, Yi Bao, Ying Huang, Matthew S. Hoehler, Genda Chen

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Reliable and accurate measurements of temperature and strain in structures subjected to fire can be difficult to obtain using traditional sensing technologies based on electrical signals. Fiber optic sensors, which are based on light signals, solve many of the problems of monitoring structures in high temperature environments; however, they present their own challenges. This paper, which is intended for structural engineers new to fiber optic sensors, reviews various fiber optic sensors that have been used to make measurements in structure fires, including the sensing principles, fabrication, key characteristics, and recently-reported applications. Three categories of fiber optic sensors are reviewed: Grating-based …

Maximum Coverage Capacitated Facility Location Problem With Range Constrained Drones, Darshan Chauhan, Avinash Unnikrishnan, Miguel Figliozzi

Civil and Environmental Engineering Faculty Publications and Presentations

Given a set of demand and potential facility locations and a set of fully available charged drones, an agency seeks to locate a pre-specified number of capacitated facilities and assign drones to the located facilities to serve the demands. The facilities serve as drone launching sites for distributing the resources. Each drone makes several one-to-one trips from the facility location to the demand points and back until the battery range is met. The planning period is short-term and therefore the recharging of drone batteries is not considered. This paper presents an integer linear programming formulation with the objective of maximizing …

Raman Spectroscopy As A Predictive Tool For Monitoring Osteoporosis Therapy In A Rat Model Of Postmenopausal Osteoporosis, J. Renwick Beattie, Antonia Sophocleous, M. Clare Caraher, Olive O'Driscoll, Niamh M. Cummins, Steven E.J. Bell, Mark R. Towler, Alireza Rahimnejad Yazdi, Stuart H. Ralston, Aymen I. Idris

Chemical and Biochemical Engineering Faculty Research & Creative Works

Pharmacological therapy of osteoporosis reduces bone loss and risk of fracture in patients. Modulation of bone mineral density cannot explain all effects. Other aspects of bone quality affecting fragility and ways to monitor them need to be better understood. Keratinous tissue acts as surrogate marker for bone protein deterioration caused by oestrogen deficiency in rats. Ovariectomised rats were treated with alendronate (ALN), parathyroid hormone (PTH) or estrogen (E2). MicroCT assessed macro structural changes. Raman spectroscopy assessed biochemical changes. Micro CT confirmed that all treatments prevented ovariectomy-induced macro structural bone loss in rats. PTH induced macro structural changes unrelated to ovariectomy. …