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Full-Text Articles in Engineering

Monitoring Of Pseudomonas Aeruginosa Toxins Via Miniaturized Electrochemical Assemblies, Thaddaeus Webster Aug 2015

Monitoring Of Pseudomonas Aeruginosa Toxins Via Miniaturized Electrochemical Assemblies, Thaddaeus Webster

Chemical Engineering Dissertations

The production of pyocyanin from the opportunistic pathogen Pseudomonas aeruginosa was probed using a variety of miniaturized electrochemical systems. Goal 1 used disposable screen printed carbon electrodes to measure pyocyanin in medically relevant samples showing for the first time that pyocyanin can be detected at medically relevant concentrations (1-100 µM) without sample processing. Goal 2 coupled these same electrodes with Polydimethylsiloxane growth chambers to expose P. aeruginosa biofilms to varying concentrations of colistin sulphate. A reduction in electrochemical signal from pyocyanin, of approximately 80% when exposed to 100 mg/L colistin sulphate, highlights this molecules relation to biofilm health. Goal ...


Data And Analytics For Neighborhood Development: Smart Shrinkage Decision Modeling In Baltimore, Maryland, Michael P. Johnson Jr., Justin Hollander, Eliza D. Whiteman Jul 2015

Data And Analytics For Neighborhood Development: Smart Shrinkage Decision Modeling In Baltimore, Maryland, Michael P. Johnson Jr., Justin Hollander, Eliza D. Whiteman

Michael P. Johnson

Many older cities in the United States confront the problem of long-term declines in population and economic activity resulting in blighted conditions that make conventional revitalization initiatives unlikely to succeed. Smart shrinkage, a planning approach that emphasizes alternative land uses while preserving quality of life, offers a way for cities to remain desirable places to live and work. However, there is little research on empirical methods to support planning decisions consistent with smart shrinkage.

We present results from two studies with planners from the City of Baltimore that provide novel insights regarding ways in which planners can perform vacant property ...


Agenda: Innovations In Managing Western Water: New Approaches For Balancing Environmental, Social, And Economic Outcomes, University Of Colorado Boulder. Getches Wilkinson Center For Natural Resources, Energy, And The Environment Jun 2015

Agenda: Innovations In Managing Western Water: New Approaches For Balancing Environmental, Social, And Economic Outcomes, University Of Colorado Boulder. Getches Wilkinson Center For Natural Resources, Energy, And The Environment

Innovations in Managing Western Water: New Approaches for Balancing Environmental, Social and Economic Outcomes (Martz Summer Conference, June 11-12)

Many aspects of western water allocation and management are the product of independent and uncoordinated actions, several occurring a century or more ago. However, in this modern era of water scarcity, it is increasingly acknowledged that more coordinated and deliberate decision-making is necessary for effectively balancing environmental, social, and economic objectives. In recent years, a variety of forums, processes, and tools have emerged to better manage the connections between regions, sectors, and publics linked by shared water systems. In this event, we explore the cutting edge efforts, the latest points of contention, and the opportunities for further progress.


The Crossroads Of Embracing Content Management: Using The Beaglebone Black Microcomputer To Host Omeka., Michael D. Wells, Craig Rosenbeck Jun 2015

The Crossroads Of Embracing Content Management: Using The Beaglebone Black Microcomputer To Host Omeka., Michael D. Wells, Craig Rosenbeck

Annual Conference on Information and Religion

As organizations are concerned about managing their content, it would be advantageous to know alternatives to outsourcing the content management to "the cloud". When decisions need to made because of budget or staffing restrictions, alternative solutions can be a challenge. The purpose of this presentation is to explore an alternative solution to host digital content in house for small libraries. This work seeks to explore using the single board computer called "BeagleBone Black", to host the institutional repository software Omeka. There are advantages to being able to host organizational content in house, and this solution could be an alternative that ...


Decision Science For Housing And Community Development: Localized And Evidence‐Based Responses To Distressed Housing And Blighted Communities, Michael P. Johnson Jr., Jeffrey Keisler, Senay Solak, David Turcotte, Armagan Bayram, Rachel B. Drew Jun 2015

Decision Science For Housing And Community Development: Localized And Evidence‐Based Responses To Distressed Housing And Blighted Communities, Michael P. Johnson Jr., Jeffrey Keisler, Senay Solak, David Turcotte, Armagan Bayram, Rachel B. Drew

Michael P. Johnson

This book will present decision models and applications to an important contemporary issue in urban housing and community development: local responses to the foreclosure crisis. The roots of this book are a National Science Foundation-funded project as well as an antecedent pilot project that served as a response to a phenomenon with multiple causes and large-scale and wide-ranging impacts on people, communities and markets worldwide, including in urbanized areas of the United States. The book will demonstrate that a diverse set of decision models, developed to respond to the recent foreclosure crisis in the US, can contribute to emerging scholarship ...


Influencing Factors For Use Of Unmanned Aerial Systems In Support Of Aviation Accident And Emergency Response, Brent Terwilliger, Dennis Vincenzi, David Ison, Kenneth Witcher, David Thirtyacre, Adeel Khalid Jun 2015

Influencing Factors For Use Of Unmanned Aerial Systems In Support Of Aviation Accident And Emergency Response, Brent Terwilliger, Dennis Vincenzi, David Ison, Kenneth Witcher, David Thirtyacre, Adeel Khalid

Department of Graduate Studies - Worldwide

"The purpose of this research paper was to examine the influencing factors associated with the use of unmanned aerial system (UAS) technology to support aviation accident and emergency response. The ability of first responders to react to an emergency is dependent on the quality, accuracy, timeliness, and usability of information. With aviation accidents such as the Asiana Airlines Flight 214 crash at San Francisco International Airport, the ability to sense and communicate the location of victims may reduce the potential for accidental passenger death. Furthermore, the ability to obtain information en-route to an accident may also to assist to reduce ...


18 - تحليل انرژي استفاده از نماي دوپوسته داراي مواد تغيير فاز دهنده در يک ساختمان بلندمرتبه در شرايط اقليمي تهران, Alireza Zolfaghari, Mehran Saadati Nasab, Elaheh Noroozi Jajarm Jun 2015

18 - تحليل انرژي استفاده از نماي دوپوسته داراي مواد تغيير فاز دهنده در يک ساختمان بلندمرتبه در شرايط اقليمي تهران, Alireza Zolfaghari, Mehran Saadati Nasab, Elaheh Noroozi Jajarm

Dr Alireza Zolfaghari

No abstract provided.


Image Segmentation Using Fuzzy-Spatial Taxon Cut, Lauren Barghout May 2015

Image Segmentation Using Fuzzy-Spatial Taxon Cut, Lauren Barghout

MODVIS Workshop

Images convey multiple meanings that depend on the context in which the viewer perceptually organizes the scene. This presents a problem for automated image segmentation, because it adds uncertainty to the process of selecting which objects to include or not include within a segment. I’ll discuss the implementation of a fuzzy-logic-natural-vision-processing engine that solves this problem by assuming the scene architecture prior to processing. The scene architecture, a standardized natural-scene-perception-taxonomy comprised of a hierarchy of nested spatial-taxons. Spatial-taxons are regions (pixel-sets) that are figure-like, in that they are perceived as having a contour, are either `thing-like', or a `group ...


Gold Nanostructures For Sensing And Functional Bioimaging, Maximilian Y. Fei May 2015

Gold Nanostructures For Sensing And Functional Bioimaging, Maximilian Y. Fei

Engineering and Applied Science Theses & Dissertations

Gold nanostructures offer an extremely promising path forward in the fields of imaging and sensing because of their unique optical and chemical properties. Here, we demonstrate that plasmonic nanostructures can be employed as nanoscale transducers to monitor the growth and phase transitions in ultrathin polymer films. In particular, gold nanorods with high refractive index sensitivity (~150 nm / refractive index unit (RIU)) were employed to probe the growth and swelling of polyelectrolyte multilayers (PEM). By comparing the wavelength shift and extinction intensity of the localized surface plasmon resonance (LSPR) of the gold nanorods coated with PEM in air and water, the ...


Two Correspondence Problems Easier Than One, Aaron Michaux, Zygmunt Pizlo May 2015

Two Correspondence Problems Easier Than One, Aaron Michaux, Zygmunt Pizlo

MODVIS Workshop

Computer vision research rarely makes use of symmetry in stereo reconstruction despite its established importance in perceptual psychology. Such stereo reconstructions produce visually satisfying figures with precisely located points and lines, even when input images have low or moderate resolution. However, because few invariants exist, there are no known general approaches to solving symmetry correspondence on real images. The problem is significantly easier when combined with the binocular correspondence problem, because each correspondence problem provides strong non-overlapping constraints on the solution space. We demonstrate a system that leverages these constraints to produce accurate stereo models from pairs of binocular images ...


Adaptive Motion Pooling And Diffusion For Optical Flow, Naga Venkata Kartheek Medathati, Pierre Kornprobst, Guillaume Masson, Manuela Chessa, Fabio Solari May 2015

Adaptive Motion Pooling And Diffusion For Optical Flow, Naga Venkata Kartheek Medathati, Pierre Kornprobst, Guillaume Masson, Manuela Chessa, Fabio Solari

MODVIS Workshop

We study the impact of local context of an image (contrast and 2D structure) on spatial motion integration by MT neurons. To do so, we revisited the seminal work by Heeger and Simoncelli (HS) [4] using spatio-temporal filters to estimate optical flow from V1-MT feedforward interactions. However, the HS model has difficulties to deal with several problems encountered in real scenes (e.g., blank wall problem and motion discontinuities). Here, we propose to extend the HS model with adaptive processing by focussing on the role of local context indicative of the local velocity estimates reliability. We set a network structure ...


A Space-Variant Model For Motion Interpretation Across The Visual Field, Guido Maiello, Manuela Chessa, Peter J. Bex, Fabio Solari May 2015

A Space-Variant Model For Motion Interpretation Across The Visual Field, Guido Maiello, Manuela Chessa, Peter J. Bex, Fabio Solari

MODVIS Workshop

We implement a neural model for the estimation of the focus of radial motion (FRM) at different retinal locations and we assess the model by comparing its results with respect to the precision with which human observers can estimate the FRM in naturalistic, moving dead leaves stimuli. The proposed neural model describes the deep hierarchy of the first stages of the dorsal visual pathway [Solari et al., 2014]. Such a model is space-variant, since it takes into account the retino-cortical transformation of the primate visual system through log-polar mapping that produces a cortical representation of the visual signal to the ...


Material Coefficient Of Thermal Expansion Investigation For Use In Additive Manufacturing Fused Deposition Modeling For Composite Tooling, Daniel Miller May 2015

Material Coefficient Of Thermal Expansion Investigation For Use In Additive Manufacturing Fused Deposition Modeling For Composite Tooling, Daniel Miller

Master's Theses

Polymer matrix composites are being used to manufacture light weight, high stiffness aircraft structures. These structures are often manufactured from carbon fiber reinforced epoxy. When these structures are damaged, they must be repaired to restore strength to the component to avoid the cost and logistics of having replacements parts. Occasionally, these repairs require tooling in order to make a quality repair, however, tooling generally has a long lead time. Additive manufacturing could be used to manufacture rapid tooling to create tooling for composite repairs. The issue is that polymer printed tooling has a much higher coefficient of thermal expansion (CTE ...


Cure Kinetics, Morphologies, And Mechanical Properties Of Thermoplastic/Mwcnt Modified Multifunctional Glassy Epoxies Prepared Via Continuous Reaction Methods, Xiaole Cheng May 2015

Cure Kinetics, Morphologies, And Mechanical Properties Of Thermoplastic/Mwcnt Modified Multifunctional Glassy Epoxies Prepared Via Continuous Reaction Methods, Xiaole Cheng

Dissertations

The primary goal of this dissertation is to develop a novel continuous reactor method to prepare partially cured epoxy prepolymers for aerospace prepreg applications with the aim of replacing traditional batch reactors. Compared to batch reactors, the continuous reactor is capable of solubilizing and dispersing a broad range of additives including thermoplastic tougheners, stabilizers, nanoparticles and curatives and advancing epoxy molecular weights and viscosities while reducing energy consumption.

In order to prove this concept, polyethersulfone (PES) modified 4, 4’-diaminodiphenylsulfone (44DDS)/tetraglycidyl-4, 4’-diaminodiphenylmethane (TGDDM) epoxy prepolymers were firstly prepared using both continuous reactor and batch reactor methods. Kinetic studies ...


Video Event Recognition And Prediction Based On Temporal Structure Analysis, Kang Li May 2015

Video Event Recognition And Prediction Based On Temporal Structure Analysis, Kang Li

Computer Engineering Dissertations

The increasing ubiquitousness of multimedia information in today's world has positioned video as a favored information vehicle, and given rise to an astonishing generation of social media and surveillance footage. Consumer-grade video is becoming abundant on the Internet, and it is now easier than ever to download multimedia material of any kind and quality. This raises a series of technological demands for automatic video understanding, which has motivated the research community to guide its steps towards a better attainment of such capabilities. As a result, current trends on cognitive vision promise to recognize complex events and self-adapt to different ...


Positive Control With Maximum Stability Radius For Continuous-Time Dynamic Systems, Amirreza Oghbaee May 2015

Positive Control With Maximum Stability Radius For Continuous-Time Dynamic Systems, Amirreza Oghbaee

Electrical and Computer Engineering Master's Theses

Positive systems have attracted much attention nowadays due to their numerous applications in modeling and control of physical, biological and economical systems. The state trajectory of such system remains in the nonnegative quadrant of the state space for any given nonnegative initial condition. This class of systems have nice stability and robustness properties. One can take advantage of these interesting properties to robustly stabilize general dynamic systems such that the closed-loop system becomes positive. One of the most important measures in robust control analysis is stability radius. This measure provides the amount of uncertainty that system can cope with before ...


Sorption Of Aqueous Fe(Ii) On Goethite Investigated With Stable Oxygen Isotopes, Pu Yue May 2015

Sorption Of Aqueous Fe(Ii) On Goethite Investigated With Stable Oxygen Isotopes, Pu Yue

Civil Engineering Master's Theses

This thesis work is aimed at examining the oxygen atom mixing between common iron(III) oxides and Fe(II)aq solution during the sorption process. First, 18O labeled iron(III) minerals were used in batch sorption reactors to study the exchange of oxygen atom within the Fe(II)aq - iron(III) oxide system. Results showed a much lesser extent of oxygen mixing than reported Fe mixing from previous studies, even when dissolved Fe(II) is present. The oxygen mixing extents are 3.95 % more for goethite and 9.66 % more for ferrihydrite than their respective controls within 14 days ...


Segmentation Of Pulmonary Nodules In Computed Tomography Using A Regression Neural Network Approach And Its Application To The Lung Image Database Consortium And Image Database Resource Initiative Dataset, Temesguen Messay, Russell C. Hardie, Timothy R. Tuinstra May 2015

Segmentation Of Pulmonary Nodules In Computed Tomography Using A Regression Neural Network Approach And Its Application To The Lung Image Database Consortium And Image Database Resource Initiative Dataset, Temesguen Messay, Russell C. Hardie, Timothy R. Tuinstra

Engineering and Computer Science Faculty Publications

We present new pulmonary nodule segmentation algorithms for computed tomography (CT). These include a fully-automated (FA) system, a semi-automated (SA) system, and a hybrid system. Like most traditional systems, the new FA system requires only a single user-supplied cue point. On the other hand, the SA system represents a new algorithm class requiring 8 user-supplied control points. This does increase the burden on the user, but we show that the resulting system is highly robust and can handle a variety of challenging cases. The proposed hybrid system starts with the FA system. If improved segmentation results are needed, the SA ...


Mitochondrial Dysfunction And Loss Of Glutamate Uptake In Primary Astrocytes Exposed To Titanium Dioxide Nanoparticles, Christina L. Wilson May 2015

Mitochondrial Dysfunction And Loss Of Glutamate Uptake In Primary Astrocytes Exposed To Titanium Dioxide Nanoparticles, Christina L. Wilson

Chemical & Biomolecular Engineering Theses, Dissertations, & Student Research

The proper function of astrocytes is critical for brain health as they are the most abundant cells in the brain which monitor ion homeostasis, recycle neurotransmitters and respond to tissue damage therefore disruption in astrocyte function can result in overall detrimental effects and has been linked with neurodegenerative diseases. Titanium Dioxide (TiO2) nanoparticles are currently the second most produced engineered nanomaterial in the world with vast usage in consumer products leading to recurrent human exposure. Animal studies indicate significant nanoparticle accumulation in the brain while cellular toxicity studies demonstrate negative effects on neuronal cell viability and function. However, the ...


A Hot-Wire Anemometer For Particle Counters, Nicholas H. Terrell May 2015

A Hot-Wire Anemometer For Particle Counters, Nicholas H. Terrell

Boise State University Theses and Dissertations

Portable real-time air quality monitoring is becoming a reality. While the data quality of these devices may be questionable, they have shown to be promising. One such device is the optical particle counter. The particle counter functions by having laminar airflow with constant velocity traverse the path of a laser beam within an airflow channel. This thesis presents the design and integration of a hot-wire anemometer into the flow channel. The addition of an anemometer allows for real-time airflow velocity measurements to be performed and adjusted. Data from the anemometer can also be used to directly offset irregularities in particulate ...


Engineering Of Lipid Nanoparticles For Advanced Drug Delivery Applications, Stephen L. Hayward May 2015

Engineering Of Lipid Nanoparticles For Advanced Drug Delivery Applications, Stephen L. Hayward

Chemical & Biomolecular Engineering Theses, Dissertations, & Student Research

‘Nanomedicine’, the application of nanotechnology principles to the field of medicine, has stimulated the development of nano-platforms for next generation drug delivery. By exploiting nanoscale properties of materials to selectively alter intrinsic characteristics of therapeutics, researchers have improved the efficacy and pharmacokinetic profiles for a variety of drug types. Despite preliminary commercial and clinical success, there still remains a need to develop an improved delivery platform that can provide high cargo entrapment, efficient intracellular delivery, evasion of intracellular degradation pathways, and provide cell population specific targeting.

In this study we engineered a nanocarrier system composed of a core bilayer structure ...


Titanium Dioxide Nanoparticles Trigger Loss Of Hepatic Function And Perturbation Of Mitochondrial Dynamics In Primary Hepatocytes, Vaishaali Natarajan May 2015

Titanium Dioxide Nanoparticles Trigger Loss Of Hepatic Function And Perturbation Of Mitochondrial Dynamics In Primary Hepatocytes, Vaishaali Natarajan

Chemical & Biomolecular Engineering Theses, Dissertations, & Student Research

Titanium dioxide (TiO2) nanoparticles are one of the most highly manufactured nanomaterials in the world with applications in copious industrial and consumer products. The liver is a major accumulation site for many nanoparticles, including TiO2, directly through intentional ingestion or indirectly through increased environmental contamination and unintentional ingestion via water, food or animals. Growing concerns over the current usage of TiO2 coupled with the lack of mechanistic understanding of its potential health risk is the motivation for this study. Here we determined the toxic effect of three different TiO2 nanoparticles (commercially available rutile, anatase and P25 ...


تمرین های فصل چهارم, Hadi Zayandehroodi Apr 2015

تمرین های فصل چهارم, Hadi Zayandehroodi

Dr. Hadi Zayandehroodi

تمرینهای فصل چهارم - کتاب ارزیابی قابلیت اطمینان سیستم های مهندسی - نوشته دکتر محسن رضائیان


On The Influence Of Ionic Strength On Radium And Strontium Sorption To Sandy Loam Soils, Brian A. Powell, Todd Miller, Daniel I. Kaplan Apr 2015

On The Influence Of Ionic Strength On Radium And Strontium Sorption To Sandy Loam Soils, Brian A. Powell, Todd Miller, Daniel I. Kaplan

Journal of the South Carolina Academy of Science

Models which can estimate environmental transport of radioactive contaminants in natural and engineered systems are required to 1) deploy effective remediation strategies for contaminated sites, 2) design waste repositories for future waste streams, and 3) ensure protection of human and environmental health in all cases. These models require accurate transport parameters in order to correctly predict how these contaminants will move in the subsurface. This work aimed to determine more accurately the distribution coefficients for radium and strontium sorption to Savannah River Site (SRS) soils. Radium and strontium sorption to the soils was found to be highly dependent upon ionic ...


Towards The Perfect Optical Fiber, John Ballato Apr 2015

Towards The Perfect Optical Fiber, John Ballato

Journal of the South Carolina Academy of Science

Optical fibers are being used in an ever more diverse array of applications today. Many of these modern applications are in high-power and, particularly, high power-per-unit-bandwidth systems where optical nonlinearities historically have not limited overall performance. Today, however, nominally weak effects, such as stimulated Brillouin scattering (SBS), are restricting continued scaling to higher optical powers. To address these limitations, the optical fiber industry has focused on fiber geometry-related solutions such as large mode area (LMA) designs. However, since all linear and nonlinear optical phenomena are fundamentally materials-based in origin, this paper identifies material solutions to present and future performance limitations ...


قابلیت اطمینان-بخش دوم, Hadi Zayandehroodi Apr 2015

قابلیت اطمینان-بخش دوم, Hadi Zayandehroodi

Dr. Hadi Zayandehroodi

قابلیت اطمینان یک مشخصه ذاتی از هر محصول و یکی از پارامترهای طراحی محسوب می شود


دینامیک-بخش دوم, Hadi Zayandehroodi Apr 2015

دینامیک-بخش دوم, Hadi Zayandehroodi

Dr. Hadi Zayandehroodi

No abstract provided.


Design Of A 1-U Cubesat Structure For The Open Prototype For Educational Nanosats, Benjamin Kading, Jeremy Straub, Ronald Marsh Apr 2015

Design Of A 1-U Cubesat Structure For The Open Prototype For Educational Nanosats, Benjamin Kading, Jeremy Straub, Ronald Marsh

Jeremy Straub

CubeSats are a class of small satellites that have recently gained significant interest and are being developed and used for engineering test missions, bona fide research and various other applications. A 1-U CubeSat (the orig-inal form factor) has nominal dimensions of 10 cm x 10 cm x 10 cm and a mass of no more than 1.33 kg [1](however, some integrators are now consistently allow-ing higher mass levels). Due to their small size and the demonstrated ability to successfully use consumer-grade electronics in low-Earth orbit, CubeSats cost sig-nificantly less than larger sized satellites [2]. These re-duced costs, however ...


Considering Scheduling Algorithms For An Open Source Software Spacecraft, Calvin Bina, Jeremy Straub, Ronald Marsh Apr 2015

Considering Scheduling Algorithms For An Open Source Software Spacecraft, Calvin Bina, Jeremy Straub, Ronald Marsh

Jeremy Straub

The OpenOrbiter Small Satellite Development Initiative at the University of North Dakota [1] is working make space research and education more accessible world-wide [2], through the design and public release of a complete set of plans, software and other documents (see [3]) for a 1-U CubeSat. This design targets a parts cost of no more than $5,000 [4]. These lowered costs, combined with the efficiencies of the CubeSat form fac-tor [5] and free-to-qualified-developer launch services [6, 7] should facilitate greater access to space for the ed-ucational, research and other communities.


Work Done On The Operating Software For Openorbiter, Dayln Limesand, Timothy Whitney, Jeremy Straub, Ronald Marsh Apr 2015

Work Done On The Operating Software For Openorbiter, Dayln Limesand, Timothy Whitney, Jeremy Straub, Ronald Marsh

Jeremy Straub

The OpenOrbiter Program aims to develop a tem-plate for a CubeSat spacecraft that can be used world-wide to reduce spacecraft development costs1. Unlike other approaches, which may require $50,000 in upfront hardware costs2 or $250,000 in design expenses2, an OPEN-class spacecraft can be built with a parts budget of under $5,0003. This aims to enable low-cost educa-tional missions and missions in developing regions4.