Engineering Commons^™

Lonomics Atlas: A Tool To Explore Interconnected Ionomic, Genomic And Environmental Data, Eduard Dragut, Amgad Madkour, Mohamed Nabeel, Peter Baker, Mourad Ouzzani, David Salt

Cyber Center Publications

Ionomics Atlas facilitates access, analysis and interpretation of an existing large-scale heterogeneous dataset consisting of ionomic (elemental composition of an organism), ge- netic (heritable changes in the DNA of an organism) and ge- ographic information (geographic location, altitude, climate, soil properties, etc). Ionomics Atlas allows connections to be made between the genetic regulation of the ionome of plant populations and their landscape distribution, allowing scientists to investigate the role of natural ionomic variation in adaptation of populations to varied environmental conditions in the landscape. The goal of the Ionomics Atlas is twofold: (1) to allow both novice and expert users …

Reliable Power Delivery System Design For Three-Dimensional Integrated Circuits (3d Ics), Pei Wen Luo, Tao Wang, Chin Long Wey, Liang Chia Cheng, Bih Lan Sheu, Yiyu Shi

Electrical and Computer Engineering Faculty Research & Creative Works

Three-dimensional integrated circuits (3D ICs) have drawn groundswell of interest in both academia and industry in recent years. However, the power integrity of 3D ICs is threatened by the increased current density brought by vertical integration. to enhance reliability, the locations of power/ground through-silicon-vias (P/G TSVs), which are used to deliver power/ground signals to different layers, must be carefully placed to minimize IR-drop. However, the currents in 3D ICs are not deterministic and exhibit both spatial and temporal correlations. in view of this, we propose a correlation based heuristic algorithm for P/G TSV placement. Unlike most existing works, the proposed …

Functionalization Of In-Plane Photonic Microcantilever Arrays For Biosensing Applications, Stanley J. Ness

Theses and Dissertations

Microcantilevers have been investigated as high sensitivity, label free biosensors for approximately 15 years. In nearly all cases, a thin gold film deposited on the microcantilevers is used as an intermediate attachment layer because of the convenience of thiol-gold chemistry. Unfortunately, this attachment chemistry can be unstable when used with complex sample media such as blood plasma. The Nordin group at BYU has recently developed an all-silicon in-plane photonic microcantilever (PMCL) technology to serve as a platform for label-free biosensing. It has the advantage of being readily scalable to simultaneous readout of many PMCLs in array format, and allows integration …

Electrochemical Synthesis Of Silver-Tetracyanoquinodimethane Nanorods At Agar Supported Water/1,2-Dichloroethane Interface, Li Huang, Yixian Wang, Michael V. Mirkin, Bin Ren, Dongping Zhan

Journal of Electrochemistry

Silver-tetracyanoquinodimethane (AgTCNQ) is an important charge transfer salt due to its high conductivity and other electronic properties. In this communication, we report the synthesis of AgTCNQ at the liquid/liquid interface. Agar was used as a gelling agent to support water/1,2-dichloroethane (DCE) interface. Silver ions were transferred from the hydrogel into DCE phase, where they combined with TCNQ^- to form AgTCNQ nanorods. The developed method can provide a new route for synthesis of functional materials based on the electrochemistry at the liquid/liquid interface.

Underpotential Deposition Of Copper On Pt(S)[N(100)X(110)] Stepped Surfaces, Gisbert Rubn, Climent Vctor, Herrero Enrique, M. Feliu Juan

Journal of Electrochemistry

The underpotential deposition of Cu on platinum stepped surfaces composed of (100) terraces and (110) monoatomic steps has been studied in different acidic solutions. It has been found that the initial stage of copper deposition on the surface takes place simultaneously on terrace and step sites, irrespective of the nature of the adsorbing anion. During the voltammetric deposition of a full monolayer, several peaks can be observed. The analysis of the dependence of the peak charge with the step density allows assigning the different peaks to different deposition sites. The peak appearing at most positive potentials corresponds to the deposition …

In Situ Pm-Irras Studies Of A Floating Bilayer Lipid Membrane At Au(111) Electrode Surface, Su Zhangfei, Kycia Annia, Jay Leitch J., Lipkowski Jacek

Journal of Electrochemistry

In situ Polarization modulation infrared reflection absorption spectroscopy (PM-IRRAS) was used to study the structure of a DMPC + cholesterol + GM1 floating bilayer lipid membrane (fBLM) at a Au(111) surface. 1-thio-beta-D-glucose (beta-Tg) was self-assembled onto the Au electrode to increase the overall hydrophilicity of the surface. The fBLM was deposited on the beta-Tg self-assembled monolayer (SAM) using a combination of Langmuir-Blodgett/Langmuir-Schaefer (LB/LS) techniques. The carbohydrate headgroups of the GM1 molecules were physically adsorbed to the beta-Tg SAM forming a water rich cushion between the fBLM and the modified gold substrate. The PM-IRRAS spectra indicate that the DMPC molecules within …

The Oxidation Of Hydrogen Peroxide On Nanostructured Rhodium Microelectrodes, N. Bartlett Philip, F. Esterle Thomas

Journal of Electrochemistry

Mesoporous Rh films were deposited onto platinum microelectrodes from the H₁ lyotropic liquid crystalline phase of C₁₂EO₈ (octaethyleneglycol monododecyl ether). The electrodes show well defined voltammetry for the oxidation and the reduction of hydrogen peroxide at low concentrations (<10 mmol•L-1) with excellent stability for operation at neutral pH. Based on the hysteresis in the current and the potential dependence the oxidation of hydrogen peroxide occurs through a CEE mechanism involving Rh(OH)₃ on the mesoporous Rh electrode surface. At higher hydrogen peroxide concentrations the current reaches a plateau that is due to either saturation of the binding sites for hydrogen peroxide or limitation of the reaction due to acidification of the solution within the pores. For the thin films (below 200 nm) the hydrogen peroxide calibration curves we …

Third-Party Quality Management Audits For Automotive Component Manufacturing: Perceptions And Insights Into A Necessary Yet Debatable Practice, Christopher Kluse

Master's Theses and Doctoral Dissertations

Third-party quality audits have been a continued practice within the manufacturing community since release of the ISO 9000 standard in 1987. In recent times, many within the manufacturing industry are questioning the value of the audit process. (Sayle, 1995, Sayle 1999, Douglas, 2000, Gordon, 2000, Dalgleish 2006) Consequently, a need exists to better understand the impacts and perceptions of the third-party auditing process. This research used a grounded theory approach to explore the following question: How do management representatives perceive the third-party audit process?

Collection of data consisted of 25 in-depth interviews taken from management representatives within the automotive industry. …

Syngas Impurity Effects On Cell Growth, Enzymatic Activities And Ethanol Production Via Fermentation, Deshun Xu

Theses and Dissertations

A syngas compositional database with focus on trace impurities was established. For this work, ammonia (NH3) and benzene (C6H6) effects on cell growth, enzymatic activities of hydrogenase and alcohol dehydrogenase (ADH), and product formation were studied. NH3, after entering media, will be converted rapidly to NH4+, which will raise the total osmolarity of the media. NH3, as a common nutrient for the cell growth, is not the real culprit for cell growth inhibition. In essence, it is the high osmolarity resulting from the accumulation of NH4+ in the media which disrupts the normal regulation of the cells. It was concluded …

Managing The Drivers Of Airflow And Water Vapor Transport In Existing Single-Family Homes (Revised), Florida Solar Energy Center, James Cummings

FSEC Energy Research Center®

Air and water vapor are transported into and within single-family homes as a result of pathways and driving forces. Without pathways, no air or water vapor transport could occur. Likewise, without driving forces, little or no air or water vapor transport will occur. Homes always have pathways and driving forces. This report focuses on managing the driving forces that move air and water vapor across the building envelope.

Civil Engineering And Construction News, Georgia Southern University

Civil Engineering & Construction: News & Publications (2011-2022)

• Civil Engineering Professor Shen Attended SusCoM 2012

Keynote Talk Wednesday, Gil Bindewald

Modeling, Simulation, And Optimization for the 21st Century Electric Power Grid

No abstract provided.

A More Scalable Approach To Linear Programming For Energy Market Optimization, Stephen Elbert

Modeling, Simulation, And Optimization for the 21st Century Electric Power Grid

No abstract provided.

A Gpu-Based Real- Time Event Detection Framework For Power System Frequency Data Streams, Olufemi Omitaomu, Kyle Spafford, Steve Fernandez

Modeling, Simulation, And Optimization for the 21st Century Electric Power Grid

No abstract provided.

Using Petsc As A Testbed For Developing And Benchmarking Parallel Power System Applications, Shrirang Abhyankar, Barry Smith, Hong Zhang, Alexander Flueck

Modeling, Simulation, And Optimization for the 21st Century Electric Power Grid

No abstract provided.

Primary Frequency Response Ancillary Service Market Designs, Erik Ela

Modeling, Simulation, And Optimization for the 21st Century Electric Power Grid

No abstract provided.

Split-System Method For Simulating Cyberphysical Systems, James Nutaro

Modeling, Simulation, And Optimization for the 21st Century Electric Power Grid

No abstract provided.

Evaluation Of Energy Storage Technologies For Damping Control, Ray Byrne, Jason Neely, Cesar Monroy, David Schoenwald, Dan Trudnowski, Matt Donnelly

Modeling, Simulation, And Optimization for the 21st Century Electric Power Grid

No abstract provided.

Lifecycle Energy Consumption Prediction Of Residential Buildings By Incorporating Longitudinal Uncertainties, Endong Wang, Zhigang Shen

Durham School of Architectural Engineering and Construction: Faculty Publications

Accurate prediction of buildings’ lifecycle energy consumption is a critical part in lifecycle assessment of residential buildings. Longitudinal variations in building conditions, weather conditions and building’s service life can cause significant deviation of the prediction from the real lifecycle energy consumption. The objective is to improve the accuracy of lifecycle energy consumption prediction by properly modelling the longitudinal variations in residential energy consumption model using Markov chain based stochastic approach. A stochastic Markov model considering longitudinal uncertainties in building condition, degree days, and service life is developed: 1) Building’s service life is estimated through Markov deterioration curve derived from actual …

Simwind: A Geospatial Infrastructure Model For Optimizing Wind Power Generation And Transmission, Benjamin Phillips, Richard Middleton

Modeling, Simulation, And Optimization for the 21st Century Electric Power Grid

No abstract provided.

Characterizing And Modeling Wind Power Forecast Errors From Operational Systems For Use In Wind Integration Planning Studies, Bri Mathias Hodge

Modeling, Simulation, And Optimization for the 21st Century Electric Power Grid

No abstract provided.

How Important Is Sub-Hourly Modeling In Renewable Integration Studies, Greg Brinkman, Paul Denholm

Modeling, Simulation, And Optimization for the 21st Century Electric Power Grid

No abstract provided.

Next Generation Of More Efficient Markets And Planning, Richard O'Neill

Modeling, Simulation, And Optimization for the 21st Century Electric Power Grid

No abstract provided.

Stochastic Generation Expansion Planning, David Woodruff

Modeling, Simulation, And Optimization for the 21st Century Electric Power Grid

No abstract provided.

Real-Time Dynamic Models For Wind Power Plants, Mohit Singh, Vahan Gevorgian, Eduard Muljadi

Modeling, Simulation, And Optimization for the 21st Century Electric Power Grid

No abstract provided.

Stochastic Unit Commitment For The Day-Ahead Market And Resource Adequacy Assessment, Sarah Ryan

Modeling, Simulation, And Optimization for the 21st Century Electric Power Grid

No abstract provided.

Near-Field 3-D Synthetic Aperture Radar Imaging Via Compressed Sensing, Zengli Yang, Yahong Rosa Zheng

Electrical and Computer Engineering Faculty Research & Creative Works

This paper successfully implements compressed sensing (CS) to a near-field wideband 3-D synthetic aperture radar (SAR) imaging system. SAR data are measured at a low percentage of random-selected positions on a uniform grid of planar aperture in the strip map mode. the near-field 3-D range migration algorithm (RMA) is used in combination with the CS principle to reconstruct the 3-D image via l 1 regularized least-square approach. Experiments were performed with Q-band stepped-frequency monostatic strip map SAR imaging system on a blue foam embedded with eight rubber pads and one copper square chip. the results of the experiments show near-field …

On An Iterative Method For Basis Pursuit With Application To Echo Cancellation With Sparse Impulse Responses, Pratik Shah, Steven L. Grant, Jacob Benesty

Electrical and Computer Engineering Faculty Research & Creative Works

Basis pursuit has been shown to be an effective method of solving inverse problems with a small amount of data when the system to be determined has a sparse representation. Adaptive filters fall under this general category of problems. Here, we use the echo cancellation context to introduce a method of solving the basis pursuit problem with an iterative method based on the proportionate normalized affine projection algorithm (PAPA). Earlier, it has been shown that PAPA can be derived from a basis pursuit perspective. Here we refine the assumptions made in those derivations and show that an iterative form of …

Effect Of Frequency Oversampling And Cascade Initialization On Permutation Control In Frequency Domain Bss, Christopher Osterwise, Steven L. Grant

Electrical and Computer Engineering Faculty Research & Creative Works

This paper presents a new algorithm for addressing the permutation ambiguity in convolutive blind source separation. the proposed algorithm seeks to prevent permutations by frequency oversampling, and then exploiting the induced correlation between bins. Any remaining permutation is then corrected by beam pattern estimation. Cascade initialization is shown to improve system performance while decreasing processing time, while frequency oversampling is shown to increase performance with slight increases in computational time. the algorithm is proven robust against isotropic noise, producing an SIR improvement of 12.9 dB when the reverberation time is 260 ms, and the signals at the input are only …

Optimization Of Biodiesel Production Plants, Nghi T. Nguyen

Department of Chemical and Biomolecular Engineering: Dissertations, Theses, and Student Research

A conventional biodiesel plant utilizing two distillation columns to purify unreacted reactants and products is considered in this study. Thermodynamic analyses are used to assess the performance of the existing distillation columns, and reduce the costs of operation by appropriate retrofits in a biodiesel production plant. After the retrofits, the overall exergy loss for the two columns has decreased from 2430.87 kW to 1674.12 kW.

A reactive distillation is developed for esterification of lauric acid with methanol using equilibrium and nonequilibrium models. Equilibrium modeling dominated during last few decades due to their straightforward mathematical modeling. In reality, separation depends on …