Digital Commons Network^™

An In Vitro Study Of The Anti-Biofilm Properties Of Proanthocyanidin And Chitosan In Pseudomonas Syringae Pv. Papulans, Kai Song

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Biofilm-forming bacteria are a form of planktonic microorganisms that can become resistant against conventional antibiotics. Because they are difficult to eradicate, biofilm-forming bacteria are extremely problematic for the medical industry areas. Thus, materials that can distort biofilm structure would be helpful for eliminating chronic infection and decreasing bacterial resistance. The primary objective of this study is to evaluate the anti-biofilm effect of two bio-derived substances, proanthocyanidin and chitosan. Proanthocyanidins are secondary plant metabolites that are reported to have antibiotic and antioxidant functions. Chitosan is a deacetylated derivative of chitin, which is abundant in the exoskeleton of crustaceans and insects. It …

Development Of New Generation Of Perovskite Based Noble Metal/Semiconductor Photocatalysts For Visible-Light-Driven Hydrogen Production, Peichuan Shen

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

In recent decades, semiconductor photocatalysis has attracted a growing attention as a possible alternative to existing methods of hydrogen production, hydrocarbon conversion and organic compound oxidation. Many types of photocatalysts have been developed and tested for photocatalytic applications. However, most of them do not have notable activity in visible light region, which limits their practical applications. Development of photocatalysts, which can be activated by visible light provides a promising way forward to utilize both UV and visible portions of solar spectrum. In this thesis, two main methods to advance visible light driven photocatalysis, such as bandgap modification through doping and …

Laser Processing Of Carbon Nanotube Transparent Conducting Films, Andrew Mann

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Transparent conducting films, or TCFs, are 2D electrical conductors with the ability to transmit light. Because of this, they are used in many popular electronics including smart phones, tablets, solar panels, and televisions. The most common material used as a TCF is indium tin oxide, or ITO. Although ITO has great electrical and optical characteristics, it is expensive, brittle, and difficult to pattern. These limitations have led researchers toward other materials for the next generation of displays and touch panels. The most promising material for next generation TCFs is carbon nanotubes, or CNTs. CNTs are cylindrical tubes of carbon no …

High Performance Two-Phase Thermosyphon For Energy-Efficient Refrigeration Applications: Modeling And Experiments, Chunlei Mei

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

The Two-Phase Closed Thermosyphon (TPCT) is a device that transfers heat from its bottom to top and because phase change phenomenon happens both in its bottom and top, its performance is ten times better than pure metal. It has three heat transfer regimes, condenser, adiabatic section and evaporator. The mechanism of thermosyphon is the phase change cycle: liquid absorbs heat in evaporator and then vaporizes into vapor; finally the vapor condenses along the condenser wall and flow back to evaporator liquid pool. Firstly, detailed heat transfer mechanism will be discussed. Many empirical equations will be reviewed. Geometrically, TPCT contains three …

Thermal Homeostasis In Buildings (Thib): Radiant Conditioning Of Hydronically Activated Buildings With Large Fenestration And Adequate Thermal Mass Using Natural Energy For Thermal Comfort, Peizheng Ma

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

" Living" buildings, like living bodies, seek to maintain stable internal environments while the external surroundings keep on changing. In biology, the " stable internal environment" is called homeostasis. This dissertation focuses on thermal homeostasis in buildings. In a homeostatic building, adequate thermal mass is applied to keep indoor temperature varying within a small range; natural energy is harnessed to maintain indoor temperature at a comfortable level using lower-power equipment (lowPE); hydronic radiant conditioning system is employed to distribute heat or coolness effectively to avoid over-heating or over-cooling; and large fenestration is designed for aesthetics, natural lighting and solar gain. …

Development Of Iodinated Graphene Nanoplatelets Through Redox Reaction For Their Use As Ct Contrast Agents, Aditi Parag Gadgil

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Iodinated organic compounds currently dominate the market of contrast media for CAT imaging. When these compounds have to be used in large quantities for multiple CAT scans, it can result in adverse effects ranging from mild to severe. Secondly, iodine being the only element which gives the essential optical properties to the agent, large quantity of iodine is needed in preparing these compounds. Recently, graphene-based compounds are being researched for their exceptional optical properties, and their compatibility with the body tissues. If combined with iodine, they are believed to give a significant contrast with a less dose of the agent. …

Designing A New Class Of Electrocatalysts For Polymer Electrolyte Membrane Fuel Cells: Probing Size, Composition, And Structure Dependent Electrocatalytic Performance In High-Quality, One-Dimensional Noble Metal Nanostructures, Christopher Koenigsmann

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

A key challenge in the practical commercialization of PEMFCs is the extremely high cost and relatively poor durability of carbon supported Pt nanoparticle (Pt NP/C) electrocatalysts utilized in both the anode and cathode half-cells. Herein, we synthesize and characterize a new class of high-quality one-dimensional noble metal nanostructures as a potentially new and promising structural paradigm for the next generation of electrocatalyst materials. Specifically, we investigate the nature of the complex interplay amongst size, chemical composition, and electrocatalytic performance in high-quality elemental and bimetallic 1D noble metal nanowire systems with an emphasis on achieving efficient and sustainable methods for catalyst …

Auditory Classification Of Vehicles For Scene Understanding, Scott Bejan Kaghaz-Garan

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

There have been numerous studies on the classification of auditory signals. In contrast,there have been very few studies in the implementation and classification of vehicles using purely auditory signals. This thesis presents an implementation of auditory vehicle identification using support vector machines. It explores how granular classification can be, from what type of vehicle to what action the vehicle is preforming. The granularity of the classification will greatly aid in auditory scene understanding. The classifications are done with computational complexity in mind, so embedded systems can utilize the findings. A simple averaging algorithm will also be explored that aids in …

Systematic Modeling And Characterization Of Analog Circuits Using Symbolic And Data Mining Techniques, Cristian Ferent

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Analog circuit design activities mainly depend on designers' expertise and their ability to produce new designs by combining basic devices, sub-circuits, and ideas from similar solutions as the source for innovation. There are very few systematic methods that can characterize similarities and differences between analog circuits while maintaining the correlation between design variables, performance, and trade-offs. Moreover, many computer-aided design tools are focused only on routine tasks, like transistor sizing and layout design. This dissertation presents novel techniques to automatically characterize the analog design space based on feature uniqueness and variety and to perform systematic circuit comparisons using symbolic models. …

Protecting The " House Beautiful" : Eco-Consciousness In The Victorian Novel, Margaret Kennedy

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

This dissertation discusses how literary writers of the Victorian age render toxicity and toxic behaviors visible in order to encourage reform, as well as offering models of healthy environmental engagement. This literary trend reveals what I call a rising eco-consciousness, the awareness of our relationship to the environment and the exchanges between human and nonhuman. This project emphasizes the novel, which offers a rich ground of inquiry by looking at a set of characters interacting with a space over time; in other words, it focuses on how authors mapped a complete ecology into their fiction, participating in a genre that …

La Biografã­A Difusa De Sombra Castaã±Eda: Un Anã¡Lisis Histã³Rico-Literario | La Biografía Difusa De Sombra Castañeda: Un Análisis Histórico-Literario, Mr Ramón Fernádez

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

The novelist Marcio Veloz Maggiolo is one of the most prolific Dominican writers of the last decades. In this thesis we devote our attention to the novel biografía difusa de Sombra Castañeda. We go through many of the modulation of the construct Dominican cultural identity presented in the novel. Trying to objectively define the construct Dominican Cultural identity, La biografía difusa de Sombra Castañeda explores its character's way of life, displaying the complex relationships between the dictator, Sombra Castañeda, and his subordinates, the Dominican people. We analyze these relationships with an eye on the way in which the subordinates are …

Uncovering The Structure Of (Super)Conformal Field Theories, Pedro Liendo

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Conformal field theories (CFTs) are of central importance in modern theoretical physics, with applications that range from condensed matter physics to particle theory phenomenology. In this Ph.D. thesis we study CFTs from two somehow orthogonal (but complementary) points of view. In the first approach we concentrate our efforts in two specific examples: the Veneziano limit of N=2 and N=1 superconformal QCD. The addition of supersymmetry makes these theories amenable to analytical analysis. In particular, we use the correspondence between single trace operators and states of a spin chain to study the integrability properties of each theory. Our results indicate that …

Translational Symmetry Breaking In Materials: First-Principles Wannier Function Study, Chia-Hui Lin

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

The spatial periodicity of the crystal structure dictates the electronic band structure theory as the fundamental paradigm in solid state physics. The original translation in materials is commonly broken with an enlarged unit cell required by spontaneously developed long-range order or multiple competing periodicities. The former happens in the systems undergoing the phase transition to antiferromagnetism, charge/spin density waves or lattice distortion. The latter originates from the intrinsic arrangement of the multiple atom system or the externally introduced impurities. The emergence of the broken symmetry can significantly modify the electronic structure, shift the chemical potential, and change the electric, magnetic …

Multi-Dimensional Workload Analysis And Synthesis For Modern Storage Systems, Vasily Tarasov

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Modern computer systems produce and process an overwhelming amount of data at an increasing rates. The performance of storage hardware components, however, cannot keep up with the required speed at a practical cost. To mitigate this discrepancy, storage vendors incorporate many workload-driven optimizations in their products. Emerging applications cause workload patterns to change rapidly and significantly. One of the prominent examples is a rapid shift towards virtualized environments. Virtual machines mix I/O streams from different applications and perturb applications' access patterns. In addition, modern users demand more convenience features, such as deduplication, snapshotting, and encryption. Stringent performance requirements, changing I/O …

Commencement Program 2013 December: School Of Social Work; School Of Urban And Public Affairs; University College, The University Of Texas At Arlington

Commencement Programs, Photos, and Video

No abstract provided.

Commencement Program 2013 December: College Of Education And Health Professions, The University Of Texas At Arlington

Commencement Programs, Photos, and Video

No abstract provided.

Commencement Program 2013 December: College Of Liberal Arts, The University Of Texas At Arlington

Commencement Programs, Photos, and Video

No abstract provided.

Design Of Naca 0012 Airfoil And Calibration Setup For Transonic Wind Tunnel, Andrew Velasquez

McNair Scholars Research Journal

No abstract provided.

Design And Construction Of An Omni-Directional Soccer Ball Thrower, Andrew James Marquette

Undergraduate Honors Capstone Projects

Introduction

We are ODST the Omni-Directional Soccer Ball Thrower team which designed the soccer ball launching machine. Working in direct correlation with the project sponsor John Meade from Athlonic Sports this is the report outlining the soccer ball thrower. John from Athlonic Sports came up with the overall project and initial project vision. There are soccer ball launching machines on the market but lacking mobility, not amiable and are heavy. The design needed to be mobile, amiable, lightweight, and have a soccer ball capacity incorporated into the machine. This will allow coaches to repeatability place the soccer ball in certain …

The Importance Of Developmentally Appropriate Practice In Early Childhood Education, Jeneille Larsen

Undergraduate Honors Capstone Projects

It is important for educators, parents and families to know how children learn and what options of early education and curriculum are available. Three theorists and their theories on how children learn and obtain information, the NAEYC's statement on Developmentally Appropriate Practice and various preschool's throughout the world and their methods and curriculum is discussed. A "perfect" preschool method is then proposed using all the previous information to formulate the ideal preschool and curriculum.

A Microreactor Approach For Chemoselective Capture And Analysis Of Carbonyl Compounds In Air And Exhaled Breath., Mingxiao Li

Electronic Theses and Dissertations

Detection of volatile organic compounds (VOCs) at trace level (parts per billion volume (ppbv) to parts per trillion (pptv)) has become an important research area because of demanding applications in homeland security, environmental monitoring, and noninvasive diagnosis of diseases. The analysis of trace VOCs challenges existing analytical instruments because their concentrations are beyond current instrument limits of detection. In this dissertation, we have investigated an innovative microreactor that is suitable for quantitative analysis of volatile carbonyl compounds in ambient air as well as in human exhaled breath. The approach is based on microreactor chips fabricated from four inch silicon wafers. …

Zif-8 : Novel Catalytic Material For The Conversion Of Co2 To Cyclic Carbonates., Minqi Zhu

Electronic Theses and Dissertations

The effective utilization of CO2 as a renewable raw material for the production of useful chemicals is an area of great interest. There are several motivations for producing chemicals from CO2 whenever possible: (1) CO2 is a cheap, non-toxic and nonflammable feedstock that can frequently replace toxic chemicals such as phosgene or isocyanates; (2) CO2 is a totally renewable feedstock compared to oil or coal; (3) the production of chemicals from CO2 can lead to totally new materials such as polymers; (4) new routes to existing chemical intermediates and products could be more efficient and economical than current methods; and …

Geometric Modeling Of Non-Rigid 3d Shapes : Theory And Application To Object Recognition., Mostafa Abdelrahman

Electronic Theses and Dissertations

One of the major goals of computer vision is the development of flexible and efficient methods for shape representation. This is true, especially for non-rigid 3D shapes where a great variety of shapes are produced as a result of deformations of a non-rigid object. Modeling these non-rigid shapes is a very challenging problem. Being able to analyze the properties of such shapes and describe their behavior is the key issue in research. Also, considering photometric features can play an important role in many shape analysis applications, such as shape matching and correspondence because it contains rich information about the visual …

Optimization Models For Resource Allocation Under Perturbation., Dongxue Bridgeman 1986-

Electronic Theses and Dissertations

Optimization Models for Resource allocation are investing in how to make the best use of available but limited resources in order to achieve the best results. In strategic planning, resource allocation is a plan for using available resources, especially in the near future, to achieve the goals of the future. It is a process of allocating resources during the entire planning horizon and among the various units. Resource allocation plans can be decided by using mathematical programming. In this dissertation, the research has been focused on how to allocate resources in the uncertain environment. The mathematical programming formulations for the …

The Societal Acceptance Of Online Degrees In The Arab World: Evidence From Two Countries, Alaa Sadik

Journal of Educational and Psychological Studies

The purpose of this study was to investigate the societal acceptance of degrees earned wholly online and to define the factors that affect the perceived value of these degrees in two Arab countries; Egypt and Oman. To achieve this purpose, a societal acceptance of online distance education degrees questionnaire was developed and administered online to a sample of 479 participants from different business sectors in Egypt and Oman. The responses to the rating scales and open-ended questions were organized, analyzed, and coded to address pattern of responses. Quantitative data and open-ended responses showed that the overall perception expressed by respondents …

A Cost Model For Managing Producer And Consumer Risk In Availability Demonstration Testing., Randall L. Walker

Electronic Theses and Dissertations

Evaluation and demonstration of system performance against specified requirements is an essential element of risk reduction during the design, development, and production phases of a product lifecycle. Typical demonstration testing focuses on reliability and maintainability without consideration for availability. A practical reason considers the fact that demonstration testing for availability cannot be performed until very late in the product lifecycle when production representative units become available and system integration is completed. At this point, the requirement to field the system often takes priority over demonstration of availability performance. Without proper validation testing, the system can be fielded with reduced mission …

Face Recognition Using Statistical Adapted Local Binary Patterns., Abdallah Abd-Elghafar Mohamed

Electronic Theses and Dissertations

Biometrics is the study of methods of recognizing humans based on their behavioral and physical characteristics or traits. Face recognition is one of the biometric modalities that received a great amount of attention from many researchers during the past few decades because of its potential applications in a variety of security domains. Face recognition however is not only concerned with recognizing human faces, but also with recognizing faces of non-biological entities or avatars. Fortunately, the need for secure and affordable virtual worlds is attracting the attention of many researchers who seek to find fast, automatic and reliable ways to identify …

Motor Protection Lab Experiment Using Sel-710, Ozro Corulli

Electrical Engineering

Advancements in microprocessor based relay technology for power protection applications provide quicker response times and new methods of mitigation. This project develops a lab experiment for Cal Poly class EE444 - Power Systems Laboratory based on the Schweitzer SEL-710 motor protection relay. Learning objectives for this lab include relay setup, programming, and protection schemes for the following conditions: undervoltage, loss of phase, fault, locked rotor, and thermal overload. Today, utility companies across the globe use SEL relays for primary system protection, putting engineers familiar with their operation in high demand.

Two Channel Audio Mixer, Dylan Kinney

Electrical Engineering

No abstract provided.

Artificial Neural Network Used For Short Term Wind Speed Prediction, Alexandra Lodge

Electrical Engineering

No abstract provided.