Engineering Commons^™

The Derived Equivalent Circuit Model For Non-Magnetized And Magnetized Graphene, Ying S. Cao, Li (Lijun) Jun Jiang, Albert E. Ruehli

Electrical and Computer Engineering Faculty Research & Creative Works

In this work, for the first time the electromagnetic features of graphene are characterized by a circuit model derived instead of fitted from the electric field integral equation (EFIE). The atomically thick graphene is equivalently replaced by an impedance surface. When it is magnetized, the impedance surface is anisotropic with a tensor conductivity. Based on EFIE, the graphene's circuit model can be derived by the partial element equivalency circuit (PEEC) concept. The anisotropic resistivity is modeled using a serial resistor with current control voltage sources (CCVSs). From the derived circuit model, electromagnetic properties of graphene can be conveniently analyzed. This …

College Of Engineering News, Georgia Southern University

College of Engineering & Computing: News & Publications (2010-2023)

• Welcome Daniel Cox, new Chair of MfgE!
• CEIT Student Wins Averitt Award

Uav As A Service: Providing On-Demand Access And On-The-Fly Retasking Of Multi-Tenant Uavs Using Cloud Services, Justin Yapp

Doctoral Dissertations and Master's Theses

As commercial roles for Unmanned Aerial Vehicles (UAVs) become more well-defined and demand for the services provided by them increases, UAVs rely more on new cloud computing services and co-operative coordination to provide mission planning, control, tracking and data processing. We present UAV as a Service (UAVaaS) framework, which brings features commonly found in traditional cloud services, such as Infrastructure, Platform, and Software as a Service, to the domain of UAVs. Our work aims to conceptualize and design UAVaaS for commercial applications. Specifically, a cloud-provided orchestration framework that allows multi-tenant UAVs to easily serve multiple heterogenous clients at once and …

Walking Simulator Mechanism, Titus Lungu, Igor Tachynskyy, Omri Tayyara

The Downtown Review: An Interdisciplinary Journal Written and Peer-Reviewed by Mandel Honors College Students at Cleveland State University

This paper presents the design, simulation, and kinematic evaluation of a mechanism aimed at simulating both the motion and ground reaction forces produced by a human foot while walking. Such a mechanism can be used to test the durability of shoes through life cycle analysis. In attempting to mimic the physical motion of the human foot as closely as possible, the forces experienced by the human foot were also accurately replicated through the incorporation of a non-stationary testing platform. As is shown in the paper, this testing environment allows for simple adjustments to be made in order to simulate different …

Dr. Hadi Soroosh Research Presentation | Biological Engineering, Usu College Of Engineering

College of Engineering News

Rise of human population causes an increase of freshwater use and wastewater production worldwide. Wastewater contains various pathogens injurious to health and nutrients (mainly N and P) which would support photosynthesis of chlorophytes and terrestrial plants but can be also an ecological threat to the environment. The conventional wastewater treatment plants (WWTP) require a large amount of energy (for mechanical aeration) and causes emission of CO2 and secondary contamination (by use of flocculants). Microalgae-Bacteria (MaB) biocoenosis can improve the capacity of the treatment system by simultaneous removal of the nutrients and carbon from wastewater with minimum carbon footprint and energy …

Augmented Reality In The Classroom, Patrick Jb Foster, Sean Cunniff

Honors Thesis

Low vision can have an exceptionally negative impact on a student’s ability to learn, especially when subjected to the conventional education system. In this environment, students are expected to adhere to a lecture that delivers most information visually via a whiteboard or a projector screen. The goal of this project is to create a customizable application for a smartphone that implements selective processing in order to make it easier for visually impaired students to engage with and learn from lectures.

Specifically, this application is written in the Java language for the Android platform. The application uses OpenGL ES, a C-like …

2016 Student Professional Awareness Conference (Spac) | Electrical And Computer Engineering, Usu College Of Engineering

College of Engineering News

This program exists in many forms across the nation as the scope and goals of the event are at the discretion of the host Branch. In 2013, the USU Student Branch had a vision for a conference never before seen at USU, and since 2014, this branch has hosted the largest S-PACs in the Utah section. The event has been attended by up to 170 people and featured workshops and speakers in an all-day professional conference setting. Today, the IEEE Student branch is building on the success of the past IEEE Councils to make this the best year for the …

Pwm-Controlled Dc-Dc Converter Designs In 3d Ics Using Through-Silicon-Via Inductors, Prateek N. Kankonkar, Umamaheswara Rao Tida, Cheng Zhou, Yiyu Shi

Electrical and Computer Engineering Faculty Research & Creative Works

There has been a tremendous research effort in recent years to move DC-DC converters on chip for enhanced performance. To reduce the large area overhead induced by conventional spiral inductors, existing literature has used through-silicon-vias (TSVs) inductors in basic DC-DC converters without feedback control. In this paper, we further study the possible application of TSV inductors in DC-DC converters with Pulse Width Modulation (PWM)-controlled feedback. The DC-DC converter with TSV inductor is at par in terms of performance with other conventional designs in the literature. Experimental results show that by replacing conventional spiral inductors with TSV inductors, up to 4.3x …

Applying Gis Technology In Airport Management, Eleanor Clark

Honors Projects

This honors project involved applying two disciplines to aid in advancing the efficiency of airport management at the Toledo Express Airport. I utilized my geography and aviation knowledge and geographic information system (GIS) skills to create a GIS, a webmap, and a 3-in-1 map-based program that had the capabilities of executing Part 139 Self Inspections, asset management, and work orders. The GIS system and webmap were successfully created to aid in management, cohesiveness, and efficiency within the Toledo-Lucas County Port Authority, the managing entity of the Toledo Express Airport. For the 3-in-1 map-based program, I worked closely alongside a programmer …

Order Reduction Of Dae Models, John Hedengren, Thomas F. Edgar

Faculty Publications

This report outlines a technique for the order reduction of differential algebraic equations (DAEs). The order reduction is accomplished in two steps. First, algebraic states are partitioned into successive implicit sets of variables and equations by reconstructing the sparsity pattern into lower triangular block form. Second, proper orthogonal decomposition (POD) is used to reduce the number of differential states. As a test case for the theory, a dynamic binary distillation column model is analyzed with the generalized approach. The index 1 DAE model of 52 differential and 178 algebraic states is reduced to an ODE model of 26 differential states.

A Cyber-Physical System, Andrew Davis, Dustin Bowe, Josiah Nagel

Montview Journal of Research & Scholarship

The team was tasked with the creation of an autonomous cyber-physical system that could be continually developed as a post-capstone class by future STEM students and as a means to teach future engineering students. The strict definition of a cyber-physical system is a computation machine that networks with an embedded computer that performs a physical function. The autonomous aspect was achieved through two sonic sensors to monitor object distances in order to avoid walls and obstacles. The integrated system was based on the Intel Edison computation module. A primary goal for future addition is automation capabilities and machine learning applications.

Biosignatures In Mars Analog Acid Salt Lakes, Sarah Stewart Johnson, M. L. Soni, D. J. Collins, Kathleen C. Benison, Melanie R. Mormile, M. G. Chevrette, B. L. Ehlmann

Biological Sciences Faculty Research & Creative Works

Paleolake sites on Mars, particularly buried deposits that have been shielded from surface radiation, serve as intriguing targets for the search for life. Mars-like ephemeral playa lakes here on Earth can offer insights and perspectives on the possibilities for physical, metabolic, and biomolecular biosignature recovery from similar environments on Mars.

Stabilizing The Cold Plasma-Stimulated Medium By Regulating Medium’S Composition, Dayun Yan, Niki Nourmohammadi, Ka Bian, Ferid Murad, Jonathan H. Sherman, Michael Keidar

Biochemistry and Molecular Medicine Faculty Publications

Over past several years, the cold plasma-stimulated medium (PSM) has shown its remarkable anti-cancer capacity in par with the direct cold plasma irradiation on cancer cells or tumor tissues. Independent of the cold plasma device, PSM has noticeable advantage of being a flexible platform in cancer treatment. Currently, the largest disadvantage of PSM is its degradation during the storage over a wide temperature range. So far, to stabilize PSM, it must be remained frozen at −80 °C. In this study, we first reveal that the degradation of PSM is mainly due to the reaction between the reactive species and specific …

Development And Validation Of An Empirical Temperature-Dependent Voltage Model For Diode Laser Characterization, Grant Matthew Brodnik

Graduate Theses - Physics and Optical Engineering

This work investigates the effects of temperature on the operation and performance of indium-phosphide (InP) based high-power broad-area laser (BAL) diodes operating in the eye-safe regime (1.5 μm – 2.0 μm). Low temperature (-80C to 0C) operation using a cryogenically cooled system enables investigation of temperature-dependent parameters such as threshold current, slope efficiency, diode voltage, and power conversion efficiency (PCE) of devices. Building upon established empirical models that describe threshold current and slope efficiency as functions of temperature, a key additional parametric model is developed to describe diode voltage incorporating a temperature dependence. With the inclusion of this temperature-dependent voltage …

Neurosim: Naturally Extensible, Unique Risc Operation Simulator, David Eric Mcneil

Graduate Theses - Electrical and Computer Engineering

The NEUROSim framework consists of a compiler, assembler, and cycle-accurate processor simulator to facilitate computer architecture research. This framework provides a core instruction set common to many applications and a simulated datapath capable of executing these instructions. However, the core contribution of NEUROSim is its exible and extensible design allowing for the addition of instructions and architecture changes which target aspecic application. The NEUROSim framework is presented through the analysis of many system design decisions including execution forwarding, control change detection, FPU configuration, loop unrolling, recursive functions, self modifying code, branch predictors, and cache architectures. To demonstrate its exible nature, …

Modular Design Of An Educational Robotics Platform, Zhen Wei

Graduate Theses - Electrical and Computer Engineering

The goal of this thesis is to design a modular educational robotics platform to improve the limitation of current educational robotics platforms, such as limited pins, single programming language, and single programming device. This platform uses an SPI bus for modularity and to solve the problem of limited pins on current educational robot platforms. A Raspberry Pi, which runs a 32bit Embedded Linux System, has been used to build the central control for this educational robotics platform to enable it to use different programming languages and to be programmed by different devices. The modules and libraries for stepper motors and …

Process Development Challenges Associated With Gallium Nitride Materials, Eric A. Evangelou

Journal of the Microelectronic Engineering Conference

No abstract provided.

Fabrication Of Electrostatically Actuated Mems Switch, Mattias Herrfurth

Journal of the Microelectronic Engineering Conference

This paper summarizes the process of designing, fabricating, and analyzing a series of MEMS switches. These devices are composed of a mechanical conductive polysilicon material being brought into contact to a signal line so as to rectify it. The parameters altered between each switch include the number of arms anchoring the mechanical polysilicon to the substrate and various dimensional constants. These dimensional constants include values for the width and length of the arms, and the area of the electrodes used in the electrostatic operation. Two sets of devices were fabricated for this paper, and data was obtained for the advancement …

Fabrication Of Electrostatically Actuated Mems Switch, Mattias Herrfurth

Journal of the Microelectronic Engineering Conference

No abstract provided.

Silicon Photonic Devices Manufactured Using Double Patterned I-Line Lithography, Patsy Cadareanu

Journal of the Microelectronic Engineering Conference

The purpose of this project is to realize infrared photonic waveguides and ring resonators from hydrogenated amorphous silicon (aSi) in the Rochester Institute of Technology Semiconductor & Microsystems Fabrication Laboratory (SMFL). The waveguides are intended to be 250 nm thick; the guidewidth goal is 500nm at its widest, tapered to 100 nm at the ends for boosting coupling success during testing. The waveguide is arranged in a symmetrical Ushape configuration with the guidelegs designed to be approximately 75μm away from each other and 365μm long on each side. The ring is intended to be 40μm in diameter. This paper covers …

Optimization Of Transmission Line Measurement (Tlm) Structures For Contact Resistivity Determination, Sidhant Grover

Journal of the Microelectronic Engineering Conference

No abstract provided.

Lamellar Directed Self Self-Assembly Using Ps-B-Pmma Block Copolymers, Jacob P. Kupernik

Journal of the Microelectronic Engineering Conference

The goal of this senior design project was to develop a DSA process for the RIT SMFL and enable further research and teaching opportunities. The objective of this project was to achieve lamellar structure formation using a PS-b-PMMA BCP annealed thermally and in solvent vapor. Thermal annealing of the samples resulted in destructive film oxidation. SVA was carried out on the samples using both toluene and THF and the pattern was revealed using an oxygen RIE. No significant changes in pattern morphology were noted when comparing the toluene and THF SVA processes. Final patterns were observed using the RIT Nano-Imaging …

Directed Self-Assembly Using Ps-B-Pmma Block Copolymers, Jacob Kupernik

Journal of the Microelectronic Engineering Conference

No abstract provided.

Direct Write Optical Waveguide Fabrication In Organic Films Using A Heidelberg Laser Writer, Ryan Moss

Journal of the Microelectronic Engineering Conference

Fabrication and characterization of mr-DWL photoresist buried channel waveguides on glass is carried out using the Heidelberg DWL 66+ (a laser direct write system). Waveguides are formed of mr-DWL-5 on glass with a spun on cladding material Norland Optical Adhesive-65(NOA- 65). The optical waveguides are successfully coupled at 650nm, and resonance structures tested at 710nm. Ring resonators with nominal spacing of .9um and a radius of 350um have an approximate quality factor of 71k .

Ferroelectric Hfo2 Thin Films For Fefet Memory Devices, Joe Mcglone

Journal of the Microelectronic Engineering Conference

No abstract provided.

Manipulation Of Surface Plasmon Resonance In Metal And Alloy Thin Films Using Dielectric Media, Benjamin Dubray Hall

Graduate Theses - Physics and Optical Engineering

Surface plasmon polaritons are coherent electron oscillations that propagate along an interface between a Drude metal and a dielectric medium. The excitation of polaritons is highly dependent on the dielectric properties of the metal, the thickness of the metal, and the optical properties of the dielectric material. First, plasmonic activity is assessed for several thicknesses of silver and nickel chromium under He-Ne incidence. Relationships between film thickness and metal dielectric function are explored in both cases. To manipulate the plasmonic activity at the silver surfaces, two methods are explored. Silver oxide was grown on the surface of the silver films, …

Bending Loss Mitigation By Surface Plasmon Resonance, Daniel Steven Spoor

Graduate Theses - Physics and Optical Engineering

Surface plasmon resonance can be used to confine a wave within a thin metal film. The resultant wave is very well-confined by the extreme refractive index difference between the metal and the ambient medium. Such confinement can be used to guide waves under extreme conditions such as subwavelength channels or through extremely tight bends where radiation losses would normally dissipate the wave.

A nichrome thin film was deposited and etched as a shadow alongside a series of multi-mode SU-8 slab waveguides with extremely sharp angled bends. Light from a Helium-Neon laser was coupled into these waveguides and the power transmitted …

Bluetooth Low Energy Platform With Simblee, Calvin W. Freeman

Computer Science and Computer Engineering Undergraduate Honors Theses

Bluetooth Low Energy provides a platform for many developers to implement low power communication for a wide range of applications. The Internet of Things (IoT) is an emerging concept that is gaining traction in the world of embedded systems. Bluetooth Low Energy is one of the latest enablers of this movement and the Simblee module improves BLE accessibility. This thesis provides an evaluation of the average power consumption the Simblee uses in different use cases. By leveraging one of the Simblee’s most notable features, the Ultra Low Power mode, very low power consumption can be achieved, potentially increasing battery life …

Working At Tds Telecom This Summer: Cad To Gis Transform And Creating Arcgis Tools By Using Python Scripts, Zhen Yuan

Sustainability and Social Justice

My summer internship at TDS telecom last for 3 months from June to August of 2015, where I learned many academic skills and techniques during this process. Except these skills I also learned a lot from this traveling to Wisconsin itself. TDS telecom is an American local telecommunication company which is headquartered in Madison, Wisconsin. And this internship was a paid full-time internship which can be separated into two parts: manually transferring CAD data and creating python scripts to transfer the CAD data.

Evaluating The Economic Impacts Of The Legislatively Delayed Provisions Of The 5th Edition (2014) Florida Building Code (Final Report), Florida Solar Energy Center, Robin Vieira

FSEC Energy Research Center®

This research provides an assessment of the potential economic impacts of implementing three legislatively delayed requirements of the Florida Building Code, 5th Edition (2014): 1) residential air leakage testing, 2) residential whole-house mechanical ventilation, and 3) two fire service access elevators for applicable buildings.