Engineering Commons^™

Resistive Transition Metal Oxide Memory, Wilkie Olin-Ammentorp

Journal of the Microelectronic Engineering Conference

No abstract provided.

Tanos Charge-Trapping Flash Memory Structures, Spencer Pringle

Journal of the Microelectronic Engineering Conference

No abstract provided.

Interview With Doris Peterson, Rca Heritage Program

RCA Oral History Transcripts

Interview with Doris Peterson for the RCA Heritage Program Oral History grant.

Interview With Dr. Matthew Campanella, Rca Heritage Program

RCA Oral History Transcripts

Interview with Dr, Matthew Campanella for the RCA Heritage Program Oral History grant.

Interview With John Pope, Rca Heritage Program

RCA Oral History Transcripts

Interview with John Pope for the RCA Heritage Program Oral History grant.

Soil-Bentonite Slurry Trench Cutoff Wall Final Design Report, Ushma Manandhar, Brian Ward, Tyler Zbytek

NSF Soil-Bentonite Slurry Trench Cutoff Wall Documents

Technical report includes background information on the project, site borings, several laboratory tests that were performed, and designs for the cutoff wall.

The Integration Of Heat Resources In A Solar Thermal-Heat Pump Hydronic System, John Maxfield Degrove

Open Access Theses

According to the U.S. Department of Energy, roughly 41% of the energy consumed in the U.S. is used the power buildings. Within that number, almost half is used to heat or cool the building. Current technologies allow for consistent thermal management, but most utilize energy harvested from fossil fuels or convert electricity back into thermal energy. Background literature shows that the utilization of alternative heat resources such as heat pumps and solar thermal collectors can greatly reduce the energy used for heat delivery while producing adequate heating performance. A combined hydronic system using a bank of solar thermal collectors in …

Enhanced Presentation Of Tomographic Data, Carmen Watts Clayton, Bernice E. Mills, George Buffleben, Thien Vu-Nguyen

STAR Program Research Presentations

Solid materials can now be viewed non-destructively with x-rays by tomography; a technique for taking many 2D images of an object at many angles and reconstructing the images into a 3D data cube. The data is next rendered into 2D or 3D still images or movies. By nature, x-ray tomography yields a very large amount of data in three dimensions. Effectively displaying this data to an audience is a challenge.

In this work techniques are explored to improve the presentation methods of movies of both 2D and 3D tomographic data for visual appeal and correct perspective. Finding the optimal ways …

Measuring Pulse Rate Variability During Motion Artifact With A Non-Contact, Multi-Imager Photoplethysmography System, Zachary Adam Kiehl

Browse all Theses and Dissertations

Non-contact imaging photoplethysmography is an exciting new field based on the principles of traditional photoplethysmography where viable signals can now be acquired without the use of contact equipment. Recent advances regarding non-contact imaging photoplethysmography have permitted a wide range of new possibilities focused on sensing the cardiopulmonary system. Physiological metrics such as pulse rate, respiration rate, and pulse rate variability can be obtained by current photoplethysmographic imaging methods. Although previous systems were challenged by head-motion artifacts, the mitigation of rigid head-motion artifacts has been demonstrated with a multi-imager design. This study investigated the feasibility and accuracy of pulse rate variability …

Management Of Rural Water Services In Nicaragua: A Systematic Network Approach To Evaluating Stakeholder Alignment, Jeffrey P. Walters, Amy N. Javemick-Will

Faculty Publications - Biomedical, Mechanical, and Civil Engineering

Water sector literature attributes a substantial cause of rural water system failure in developing countries to poor alignment between water service stakeholders. This study aimed to investigate a means for assessing stakeholder alignment by comparing the systemic interaction of stakeholder values, where the term ‘stakeholder values’ refers to aspects stakeholders believe are necessary to ensure rural water services are sustainable. The research held focus groups with key stakeholder groups involved in the management of rural water infrastructure in Terrabona, Nicaragua, to identify stakeholder values, and then used cross-impact analysis to evaluate how these values interacted to form stakeholder value networks …

Liver Sinusoid On A Chip: Long-Term Layered Co-Culture Of Primary Rat Hepatocytes And Endothelial Cells In Microfluidic Platforms, Young Bok (Abraham) Kang, Temitope R. Sodunke, Jason Lamontagne, Joseph Cirillo, Caroline Rajiv, Michael J. Bouchard, Moses Noh

Faculty Publications - Biomedical, Mechanical, and Civil Engineering

We describe the generation of microfluidic platforms for the co-culture of primary hepatocytes and endothelial cells; these platforms mimic the architecture of a liver sinusoid. This paper describes a progressional study of creating such a liver sinusoid on a chip system. Primary rat hepatocytes (PRHs) were co-cultured with primary or established endothelial cells in layers in single and dual microchannel configurations with or without continuous perfusion. Cell viability and maintenance of hepatocyte functions were monitored and compared for diverse experimental conditions. When primary rat hepatocytes were co-cultured with immortalized bovine aortic endothelial cells (BAECs) in a dual microchannel with continuous …

Full Field Reservoir Modeling Of Shale Assets Using Advanced Data-Driven Analytics, Soodabeh Esmaili, Shahab D. Mohaghegh

Faculty & Staff Scholarship

Hydrocarbon production from shale has attracted much attention in the recent years. When applied to this prolific and hydrocarbon rich resource plays, our understanding of the complexities of the flow mechanism (sorption process and flow behavior in complex fracture systems - induced or natural) leaves much to be desired. In this paper, we present and discuss a novel approach to modeling, history matching of hydrocarbon production from a Marcellus shale asset in southwestern Pennsylvania using advanced data mining, pattern recognition and machine learning technologies. In this new approach instead of imposing our understanding of the flow mechanism, the impact of …

Collagen Crosslinking Reagent Utilized To Modify The Mechanical Properties Of The Soft Palate In Equine Snoring And Apnea Applications, Stephanie L. Hunt

Theses and Dissertations--Biomedical Engineering

Snoring is a sleep disruption that can lead to obstructive sleep apnea (OSA), which interrupts breathing by obstructing the airway. Injecting a protein crosslinker, such as genipin, into the soft palate could decrease the severity of snoring and OSA by stiffening the soft palate. Equine soft palates modeled human palates due to a high incidence of awake snoring and apnea.

The pilot in vivo study treated six horses with two 100 mM injections of the buffered genipin reagent. The efficacy phase horses underwent respiratory audio recordings to document snoring changes using Matlab and ImageJ in the time and frequency domains. …

Making The Case For Crew-Centered Design (Ccd) In Merchant Shipping, Aditi Kataria, Gesa Praetorius, Jens-Uwe Schröder-Hinrichs, Michael Baldauf

Conference Papers

Since 2003, the International Maritime Organization (IMO) has emphasised the need to address and integrate ergonomics knowledge in a concerted manner. However, there is little guidance on the application of this knowledge in the design of merchant vessels. Utilizing a mixed methods approach, the paper identifies the need for crew-centered design (CCD), highlighting the importance of using concepts derived from Human-Centred Design (HCD) to be able to design work spaces and operational procedures that facilitate the work of the crew on board. Drawing upon results obtained from accident analysis (utilising the Technique for the Retrospective and predictive Analysis of Cognitive …

Recdroid: A Resource Access Permission Control Portal And Recommendation Service For Smartphone Users, Gerrit Bond, Steven Jackson, Marcus Pare

Capstone Design Expo Posters

The rapid growth of the smartphone applications market raises security concerns regarding untrusted applications. Studies have shown that most apps in markets request to collect data irrelevant to the main functions of the apps. Traditional Android permission control design based on one-time decisions on installation has been proven to be ineffective in protecting users’ privacy and poorly utilizes scarce mobile resources (e.g. battery). RecDroid is designed to help protect user data in a market where unauthorized data collection is prevalent in most applications. With RecDroid’s recommendation feature, which is based on expert analysis, the user will be able to avoid …

Virtual Bus Simulation: Driver And Fuel Efficiency, James Freund, Ivan Grinkevich, Justin Boswell

Capstone Design Expo Posters

Problem Statement: VCU will be putting together state of the art 3D curved screen driving simulator. This simulator will mimic fleets of vehicles behavior and will be networked with INL and Univ. of Idaho simulators. The project will entail putting the simulator together and improving existing simulator software.

Rationale: Conduct research in the areas of important behaviors to increase driver efficiency, how simulation training can encourage good driving habits, Psychology of driver habits and distractions, and benefits of audio and visual cues to assist drivers. Approach: Identify the most optimal 3d engine and develop simulation environment using the chosen engine. …

Developing An Epics Ioc In Labview, Kenneth Butler, David Shires, Michael Talbott

Capstone Design Expo Posters

Problem Statement In working with labView and experimental physics at Jefferson Lab the current configuration is a linux based control system. Christiana has posed the task of implementing a windows based network configuration where input and output from the data readings is distributed across the network. With the help of LabView demos and CALabs softIOC we were asked to prove the concept of this windows based configuration to be possible. Specifically the task is to prove (or disprove) that we can serve data using the caLabs soft IOC.

Rationale The current configuration of Jefferson Labs data systems is served on …

3-D Culture Systemfor Rapid Expansion Of Human Neural Stem Cells, Waleed Ilyas, Jeeyun Park, Dan Reep, Lawrence Talej

Capstone Design Expo Posters

Research into stem cells is a growing field of contemporary biology due to their extraordinary potential to develop into myriad cell types for use in regenerative medicine and research applications. Stem cells can vary from adult stem cells, embryonic stem cells, or induced pluripotent stem cells, or iPS. Due to the high potential for therapeutic applications, or individualized medicine, there is an increasing demand for stem cell quantities since a critical cell count must be met to demonstrate any therapeutic effect. The problem lies in the amount of time it takes to culture this critical cell count. Isolating fibroblasts in …

Toy For Preschoolers With Deaf-Blindness, Allison R. Beckmann, Chelsea B. Gebs, Julia-Grace Polich

Capstone Design Expo Posters

There are approximately 70,000-100,000 people living in America that are diagnosed as deaf-blind. Since children with deaf-blindness are an extreme minority in the US, research, toys and technological advancements for these children get overlooked. As a result, the developmental processes of children with deaf-blindness are delayed by several years, compared to normal children, due to the lack of resources available to encourage learning. According to Virginia’s Department of Education standards of learning for preschoolers, development physically, mathematically,of environmental awareness and of a sense of self are core requirements for Kindergarten. Therefore, there is a need for a toy that will …

Cartridge Filter Testing And Development, Joshua Byrd, Daniel Phan, Tejeswini Shrestha

Capstone Design Expo Posters

Problem statement The goal is to determine the parameters which produce the optimal filters.

Rationale Melt-blowing is a process by which Delta Pure uses to manufacture water filters. Several production parameters affect the characteristics of these filters and the goal is to determine which variables impact these characteristics the most.

Approach Three different production parameters were chosen; air pressure, polymer temperature, and extruder speed. Eight filters were produced with each parameter set to high and low points, as well as one filter which served as a midpoint for the data. These filters were run in the testing rig (pictured above) …

Temperature Measurement Of Server Room, Eric Cobbinah, Faida Matabaro, Michael Tu, James Mcadams

Capstone Design Expo Posters

In this project we will be developing a system to help monitor temperature in data centers. This system will include software and a circuit to route resistive temperature devices (RTDs) (Figure 1) to a microchip which will output their readings as data. The system should be able to connect with 64 RTDs, read the temperatures from them, and make the data accessible over a network. This system could also be used in other situations besides data centers. The user would decide where to place the devices and how to use the temperature data. This system will allow more RTDs to …

Fsae Rear Differential Carrier, Nicholas Rivero, Peter Quach, Zack Jillani

Capstone Design Expo Posters

The Formula SAE design project enables engineering students to develop, analyze, build, and benchmark a Formula-style racecar. A differential was designed for VCU’s car to ensure that power is evenly distributed to the drive wheels under all possible handling conditions. A mounting system is required to secure the differential to the frame. Failure of this carrier could be catastrophic, therefore precise consideration of all possible forces and loading situations is required for design. A team was developed to examine how dynamic forces and fatigue contribute to component failure. Based on the results of this analysis a differential carrier can be …

Tapered Roller Bearing Accelerated Fatigue Life Test Rig Design, Hilton Bennett, Elizabeth Englert, Beck Grimm, Nathan Morris, Matthew Ofsonka, David Trinh

Capstone Design Expo Posters

Fatigue life testing of large tapered roller bearings for railroad applications is both expensive and time consuming. Accepted methods for testing bearings include full–size and scaled down testing. Currently, bearing test methods at Brenco take up to six months to complete, and scaled down testing requires additional resources for manufacturing prototypes and testing capabilities that are not economically ideal. The purpose of this project is the development of a tapered roller bearing test rig to test bearings to their fatigue life as quickly as possible. The rig design can accommodate bearing sizes in the range of one half (½) to …

Indicators Of Reservoir Performance, Stefano Galelli

All ECSTATIC Materials

No abstract provided.

High-Efficiency Wideband Class-F Power Amplifier With Electronically Tunable Resonant Network, Alex D. Compton

Browse all Theses and Dissertations

This thesis presents a high-efficiency Class-F power amplifier (PA) operating from 30-88 MHz through the use of an electronically tunable resonant network. While conventional Class-F designs are limited to operation over less than an octave, the proposed design utilizes reconfigurable reactive elements in order to cover the entire VHF-FM frequency range. A real circuit implementation using GaN HEMT is designed and simulated, with the notable design considerations examined in detail. A minimum power added efficiency (PAE) of 71.7% is achieved across the band, at output powers = 49.2 dBm. This combination of high output power and high-efficiency operation across a …

Flowability And Density Characteristics Of Controlled Low Strength Material (Clsm) Using Native High Plasticity Clay, Anand J. Puppala, Bhaskar Chittoori, Anil Raavi

Civil Engineering Faculty Publications and Presentations

In pipeline construction projects when high plastic clayey soils are encountered in the excavated trench material, they are typically landfilled and better quality materials are imported from outside quarry sources for use as bedding and haunch zone materials. This practice has detrimental environmental and cost impacts; therefore, an efficient reutilization of this high plastic excavated material to produce controlled low strength materials (CLSMs) to use as bedding and haunch zone materials will have major sustainability benefits. As a part of an on-going research study, novel CLSM mix designs were developed by utilizing native high plastic clayey soils from the excavated …

Research Week 2015, Linda Gardiner, David Owerbach

Office of Research Institutional Research and Scholarship

No abstract provided.

Role Of Antenna Modes And Field Enhancement In Second Harmonic Generation From Dipole Nanoantennas, Domenico De Ceglia, Maria Antonietta Vincenti, Costantino De Angelis, Andrea Locatelli, Joseph W. Haus, Michael Scalora

Electro-Optics and Photonics Faculty Publications

We study optical second harmonic generation from metallic dipole antennas with narrow gaps. Enhancement of the fundamental-frequency field in the gap region plays a marginal role on conversion efficiency. In the symmetric configuration, i.e., with the gap located at the center of the antenna axis, reducing gap size induces a significant red-shift of the maximum conversion efficiency peak. Either enhancement or inhibition of second-harmonic emission may be observed as gap size is decreased, depending on the antenna mode excited at the harmonic frequency. The second-harmonic signal is extremely sensitive to the asymmetry introduced by gap’s displacements with respect to the …

2015 Scholarly Productivity Report, Missouri University Of Science And Technology

Civil, Architectural and Environmental Engineering Scholarly Productivity Reports

No abstract provided.

Federated Account System For Accelerated Development Of Internal Systems, Javan Cohen, Nandu Radhakrishnan, Brian Seal

Capstone Design Expo Posters

Massey Cancer Center is currently bound by an internal Active Directory and role based account system and organizations outside of VCU need to write specific code to be able to access the information provided. Massey wanted to move their system to a federated account system with claims based authentication. This project is important because having information readily available to other trusted cancer research groups will help promote understanding and treatment of cancerous cells. Our approach was to take what we learned in CMSC 355 to create a design document that was approved by Dr. Fenstermacher. We used this to create …