Monitoring Of Pseudomonas Aeruginosa Toxins Via Miniaturized Electrochemical Assemblies, 2015 Northeastern University
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, 2015 University of Massachusetts - Boston
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, 2015 University of Colorado Law School
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., 2015 Northern Kentucky University
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, 2015 University of Massachusetts - Boston
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, 2015 Embry-Riddle Aeronautical University - Worldwide
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
Dr Alireza Zolfaghari
No abstract provided.
Image Segmentation Using Fuzzy-Spatial Taxon Cut, 2015 U.C. Berkeley
Image Segmentation Using Fuzzy-Spatial Taxon Cut, Lauren Barghout
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, 2015 Washington University in St Louis
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, 2015 Purdue University
Two Correspondence Problems Easier Than One, Aaron Michaux, Zygmunt Pizlo
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
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)  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, 2015 University College London
A Space-Variant Model For Motion Interpretation Across The Visual Field, Guido Maiello, Manuela Chessa, Peter J. Bex, Fabio Solari
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, 2015 The University of Southern Mississippi
Material Coefficient Of Thermal Expansion Investigation For Use In Additive Manufacturing Fused Deposition Modeling For Composite Tooling, Daniel Miller
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, 2015 University of Southern Mississippi
Cure Kinetics, Morphologies, And Mechanical Properties Of Thermoplastic/Mwcnt Modified Multifunctional Glassy Epoxies Prepared Via Continuous Reaction Methods, Xiaole Cheng
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 ...
Secure And Reliabe Routing Protocol For Transmission Data In Wireless Sensor Mesh Networks, 2015 University of Southern Mississippi
Secure And Reliabe Routing Protocol For Transmission Data In Wireless Sensor Mesh Networks, Nooh Adel Bany Muhammad
Sensor nodes collect data from the physical world then exchange it until it reaches the intended destination. This information can be sensitive, such as battlefield surveillance. Therefore, providing secure and continuous data transmissions among sensor nodes in wireless network environments is crucial. Wireless sensor networks (WSN) have limited resources, limited computation capabilities, and the exchange of data through the air and deployment in accessible areas makes the energy, security, and routing major concerns in WSN. In this research we are looking at security issues for the above reasons. WSN is susceptible to malicious activities such as hacking and physical ...
Video Event Recognition And Prediction Based On Temporal Structure Analysis, 2015 Northeastern University
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, 2015 Northeastern University
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, 2015 Northeastern University
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, 2015 University of Dayton
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, 2015 University of Nebraska-Lincoln
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 ...