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Projected Nesterov’S Proximal-Gradient Algorithm For Sparse Signal Recovery, Renliang Gu, Aleksandar Dogandžić 2017 Iowa State University

Projected Nesterov’S Proximal-Gradient Algorithm For Sparse Signal Recovery, Renliang Gu, Aleksandar Dogandžić

Electrical and Computer Engineering Publications

Abstract: We develop a projected Nesterov's proximal-gradient (PNPG) approach for sparse signal reconstruction that combines adaptive step size with Nesterov's momentum acceleration. The objective function that we wish to minimize is the sum of a convex differentiable data-fidelity (negative log-likelihood (NLL)) term and a convex regularization term. We apply sparse signal regularization where the signal belongs to a closed convex set within the closure of the domain of the NLL; the convex-set constraint facilitates flexible NLL domains and accurate signal recovery. Signal sparsity is imposed using the ℓ1 -norm penalty on the signal's linear transform coefficients ...


An Improved Method Of Arsenic (Iii) Removal By Reverse Osmosis Membrane, Yizhi Hou 2017 Marquette University

An Improved Method Of Arsenic (Iii) Removal By Reverse Osmosis Membrane, Yizhi Hou

Master's Theses (2009 -)

Arsenic is a Group 1 carcinogen as there is abundant research to support that ingestion of arsenic in drinking water and food can lead to liver, lung, kidney, or bladder cancer in humans. The recommend World Health Organization (WHO) arsenic standard in drinking water is 10 µg/L, while the Environmental Protection Agency's (EPA) Maximum Contaminant Level (MCL) of arsenic in drinking water is 10 µg/L. Globally, at least 40 million people face more than 10 µg/L arsenic contamination in their drinking water. As(III) (trivalent state, such as arsenite), and As(V) (pentavalent state, such as ...


A Parametric Investigation And Optimization Of A Cylindrical Explosive Charge, Logan Ellsworth Beaver 2017 Marquette University

A Parametric Investigation And Optimization Of A Cylindrical Explosive Charge, Logan Ellsworth Beaver

Master's Theses (2009 -)

Explosive device design has a wide impact in the space, manufacturing, military, and mining industries. As a step toward computer assisted design of explosives, an optimization framework was developed using the Design Analysis Kit for Optimization and Terrascale Applications (Dakota). This software was coupled with the hydrocode CTH. This framework was applied to three exploding cylinder models, two in 1D and one in 2D. Gradient descent, dividing rectangles, and a genetic algorithm were each applied to the one-dimensional models. Parametric studies were performed as a basis for comparison with the optimization algorithms, as well as qualifying the 1D model's ...


Development And Application Of Hydraulic And Hydrogeologic Models To Better Inform Management Decisions, Trinity L. Stout 2017 Utah State University

Development And Application Of Hydraulic And Hydrogeologic Models To Better Inform Management Decisions, Trinity L. Stout

All Graduate Theses and Dissertations

Water is one of the most important and limited resources in regions with little rainfall. As populations continue to grow, so does the need for water. Individuals in water management positions need to be well informed in order to avoid potential negative effects concerning the overall quality and amount of water available for both people and the environment. In order to provide better information for these individuals, computer models and mathematical relationships are commonly developed to estimate the outcome of different situations regarding surface water and groundwater. Along these lines, this study focused on two modeling studies that provide information ...


Heat Transfer Analysis Of Localized Heat-Treatment For Grade 91 Steel, Jacob D. Walker 2017 Utah State University

Heat Transfer Analysis Of Localized Heat-Treatment For Grade 91 Steel, Jacob D. Walker

All Graduate Theses and Dissertations

Many of the projects utilizing Grade 91 steel are large in scale, therefore it is necessary to assemble on site. The assembly of the major pieces often requires welding in the assembly; welding drastically changes the superior mechanical properties of Grade 91 steel that it was specifically developed for. Therefore, because of the adverse effects of welding on the mechanical properties of Grade 91, it is necessary to do a localized post weld heat treatment.

In this study a localized post weld heat treatment is used to gather experimental data. The data is then used to derive unknown heat transfer ...


Nanosecond Electric Pulses Differentially Affect Inward And Outward Currents In Patch Clamped Adrenal Chromaffin Cells, Lisha Yang, Gale L. Craviso, P. Thomas Vernier, Indira Chatterjee, Normand Leblanc 2017 Old Dominion University

Nanosecond Electric Pulses Differentially Affect Inward And Outward Currents In Patch Clamped Adrenal Chromaffin Cells, Lisha Yang, Gale L. Craviso, P. Thomas Vernier, Indira Chatterjee, Normand Leblanc

Bioelectrics Publications

This study examined the effect of 5 ns electric pulses on macroscopic ionic currents in whole-cell voltage-clamped adrenal chromaffin cells. Current-voltage (I-V) relationships first established that the early peak inward current was primarily composed of a fast voltage-dependent Na+ current (INa), whereas the late outward current was composed of at least three ionic currents: a voltage-gated Ca2+ current (ICa), a Ca2+-activated K+ current (IK(Ca)), and a sustained voltage-dependent delayed rectifier K+ current (IKV). A constant-voltage step protocol was next used to monitor peak inward and late outward currents before and after cell ...


Resolving Spatial And Temporal Variability In Dissolved Organic Matter Characteristics Within Combined Agricultural And Stormwater Conveyances, Bryce A. Mihalevich 2017 Utah State University

Resolving Spatial And Temporal Variability In Dissolved Organic Matter Characteristics Within Combined Agricultural And Stormwater Conveyances, Bryce A. Mihalevich

All Graduate Theses and Dissertations

In many urban areas, stormwater runoff can threaten the ecological health of streams and downstream water bodies. Due to the increased impervious nature of urban landscapes, runoff is more “flashy” and as a result, high concentrations of pollutants can be transported in shorter periods of time than in more natural environments. One pollutant of concern is dissolved organic matter (DOM). DOM is important within aquatic ecosystems, but excess amounts can cause depletion in dissolved oxygen concentrations and can negatively affect aquatic organisms. This study investigated changes in DOM quantity and sources within the Northwest Field Canal (NWFC), an urban water ...


Elastic Properties Of Superconductors And Materials With Weakly Correlated Spins, Christian Binek 2017 University of Nebraska-Lincoln

Elastic Properties Of Superconductors And Materials With Weakly Correlated Spins, Christian Binek

Christian Binek Publications

It is shown that in the ergodic regime, the temperature dependence of Young’s modulus is solely determined by the magnetic properties of a material. For the large class of materials with paramagnetic or diamagnetic response, simple functional forms of the temperature derivative of Young’s modulus are derived and compared with experimental data and empirical results. Superconducting materials in the Meissner phase are ideal diamagnets. As such, they display remarkable elastic properties. Constant diamagnetic susceptibility gives rise to a temperature independent elastic modulus for ceramic and single crystalline superconductors alike. The thermodynamic approach established in this report, paves the ...


Continuous Permeability Measurement During Unidirectional Vacuum Infusion Processing, David Wayne Hoagland 2017 Brigham Young University

Continuous Permeability Measurement During Unidirectional Vacuum Infusion Processing, David Wayne Hoagland

All Theses and Dissertations

Composite materials have traditionally been used in high-end aerospace parts and low-end consumer parts. The reason for this separation in markets is the wide gap in technology between pre-preg materials processed in an autoclave and chop strand fiberglass blown into an open mold. Liquid composite molding has emerged as a bridge between inexpensive tooling and large, technical parts. Processes such as vacuum infusion have made it possible to utilize complex layups of reinforcement materials in an open mold style set-up, creating optimal conditions for composites to penetrate many new markets with rapid innovation. Flow simulation for liquid composite molding is ...


Key Inference From Irish Traditional Music Scores And Recordings, Pierre Beauguitte, Bryan Duggan, John Kelleher 2017 Dublin Institute of Technology

Key Inference From Irish Traditional Music Scores And Recordings, Pierre Beauguitte, Bryan Duggan, John Kelleher

Conference papers

The aim of this paper is to present techniques and results for identifying the key of Irish traditional music melodies, or tunes. Several corpora are used, consisting of both symbolic and audio representations. Monophonic and heterophonic recordings are present in the audio datasets. Some particularities of Irish traditional music are discussed, notably its modal nature. New key-profiles are defined, that are better suited to Irish music.


A Graphical Representation Of Exposed Parallelism, Gustavo Enrique Rodriguez Villamizar 2017 Brigham Young University

A Graphical Representation Of Exposed Parallelism, Gustavo Enrique Rodriguez Villamizar

All Theses and Dissertations

Modern-day microprocessors are measured in part by their parallel performance. Parallelizing sequential programs is a complex task, requiring data dependence analysis of the program constructs. Researchers in the field of parallel optimization are working on shifting the optimization effort from the programmer to the compiler. The goal of this work is for the compiler to visually expose the parallel characteristics of the program to researchers as well as programmers for a better understanding of the parallel properties of their programs. In order to do that we developed Exposed Parallelism Visualization (EPV), a statically-generated graphical tool that builds a parallel task ...


Trading Off Sound Pressure Level And Average Power Production For Wind Farm Layout Optimization, Eric Tingey, Andrew Ning 2017 Brigham Young University

Trading Off Sound Pressure Level And Average Power Production For Wind Farm Layout Optimization, Eric Tingey, Andrew Ning

All Faculty Publications

This research explores the trade-offs between a wind farm’s average power production and noise impact on nearby observers. Two specific wind farm designs were studied and optimized using the FLORIS wake model and an acoustic model based on semi-empirical turbine noise calculations. It was found in the two wind farms that the average power production could be increased, up to 8.01% in one and 3.63% in the other, ignoring sound level considerations. Including a noise restriction in the optimization had a minimal impact on the optimal average power production within about a five-decibel range. Past this range ...


Continuous Electrospinning Prototype Development For Spider Silk, Justin A. Jones 2017 Utah State University

Continuous Electrospinning Prototype Development For Spider Silk, Justin A. Jones

Funded Research and Data

No abstract provided.


Summary Narrative Of Research.Pdf, David Yuill 2017 University of Nebraska-Lincoln

Summary Narrative Of Research.Pdf, David Yuill

David Yuill

I recently had to provide a brief narrative of my published work, organized by topic. In case this is helpful to somebody researching one of these topics, I have included this narrative below, with some minor modifications from the original. I have tried to highlight the main or unexpected contribution from each work and to show connections and differences between papers on related topics to help guide a reader to the appropriate publication.
The work is organized into the following topics: building envelope; fan airflow modeling; multi-stack exhaust; ventilation; control of tankless water heaters (including model predictive control); evaluation of ...


Two Hundred Years Selenium, Fathi Habashi 2017 Laval University, Quebec City, Canada

Two Hundred Years Selenium, Fathi Habashi

Fathi Habashi

Selenium was discovered in 1817 in the red mud accumulated at the bottom of a sulfuric acid lead chamber plant in which Jöns Jacob Berzelius (1779-1848) was a partner. The acid was manufactured from pyrite from Falun – the old mine in Sweden. Berzelius named the new element after Selene the goddess of the Moon in analogy with tellurium meaning Earth which was discovered earlier in 1782 in a gold ore in Transylvania in the Austrian Empire. The element was first mistaken for tellurium but on careful examination Berzelius found that it was a new element.


History Of Metallurgy, Fathi Habashi 2017 Laval University, Quebec City, Canada

History Of Metallurgy, Fathi Habashi

Fathi Habashi

A general survey of the history of metallurgy from ancient times to the present day.


The Engineering Of A Microscale Niche To Test A Novel Anti-Cancer Agent, Dominic M. Halsmer, William Ranahan, Alexander C. Mills 2017 Oral Roberts University

The Engineering Of A Microscale Niche To Test A Novel Anti-Cancer Agent, Dominic M. Halsmer, William Ranahan, Alexander C. Mills

Christian Engineering Conference

Cutting-edge biomedical research often relies on innovative tools from the field of engineering. Some of these tools are designed to investigate or probe a niche, analyzing its characteristics and affordances. Other devices are engineered to create a niche in which a specific, unique interaction can take place, while the outcomes are carefully monitored. This paper will focus of the latter and, more specifically, the production of a niche for inducing promising interaction between cancer cells and certain types of fungi. Preliminary research suggests that when maintained in close proximity to breast cancer cells, mushroom mycelia secrete compounds which trigger the ...


Digital Media Technology And Your Spiritual Life: An Uneasy Alliance, Laurel Dovich 2017 Cedarville University

Digital Media Technology And Your Spiritual Life: An Uneasy Alliance, Laurel Dovich

Christian Engineering Conference

Digital media technology has become a part of our everyday lives, filling a substantial portion of the constructive minutes and hours of our days. This technology was created by engineers, and is being further perfected by engineers with each successive generation. As engineers, should we not be at the forefront of learning how this technology is changing our culture and be leaders in teaching responsible use?

Science has documented that technology use is changing how our brain functions. Its use creates new neural pathways and causes cognitive overload in the area of our brain that controls decision-making, impulse control, attention ...


Safety And Its Ethical Challenges For The Christian Engineer In A Technological Society, Anthony C. Comer 2017 Geneva College

Safety And Its Ethical Challenges For The Christian Engineer In A Technological Society, Anthony C. Comer

Christian Engineering Conference

In every major corporation safety is a high priority and corporate policy statements stress the company’s commitment to keep people and the environment safe. However, safety comes at a cost. Corporations are in business to make profits by providing quality products and services for consumers at affordable prices. Engineers play a critical role in the design, construction, and operation of corporations across the globe and are constantly challenged to find new ways of doing things in order to reduce operating expenses in a competitive global economy. Companies must keep pace with the latest technological innovation or face the prospects ...


Shalom Seeking: Foundations Of Flourishing, Kevin Jay Timmer 2017 Dordt College

Shalom Seeking: Foundations Of Flourishing, Kevin Jay Timmer

Christian Engineering Conference

Jesus instructs us to seek first the Kingdom of God. Seeking first the Kingdom of God is no small task. It is a process of striving to show God’s love in every situation by showing love to our neighbors and to the rest of the creation. It is serving in a way that enables them to flourish. Seeking first the Kingdom of God is striving for true progress in all its wholeness; it is seeking shalom [1]. Shalom is an Old Testament word which refers to the restfulness, contentment, beauty, and harmony of a life lived in perfect obedience ...


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