Engineering Commons^™

Microfluidic Chip For Non-Invasive Analysis Of Tumor Cells Interaction With Anti-Cancer Drug Doxorubicin By Afm And Raman Spectroscopy, Han Zhang, Lifu Xiao, Qifei Li, Xiaojun Qi, Anhong Zhou

Biological Engineering Faculty Publications

Raman spectroscopy has been playing an increasingly significant role for cell classification. Here, we introduce a novel microfluidic chip for non-invasive Raman cell natural fingerprint collection. Traditional Raman spectroscopy measurement of the cells grown in a Polydimethylsiloxane (PDMS) based microfluidic device suffers from the background noise from the substrate materials of PDMS when intended to apply as an in vitro cell assay. To overcome this disadvantage, the current device is designed with a middle layer of PDMS layer sandwiched by two MgF2slides which minimize the PDMS background signal in Raman measurement. Three cancer cell lines, including a human lung cancer …

Marangoni Flows During Nonsolvent Induced Phase Separation, Douglas R. Tree, Tatsuhiro Iwama, Kris T. Delaney, Joshua Lee, Glenn H. Fredrickson

Faculty Publications

Motivated by the much discussed, yet unexplained, presence of macrovoids in polymer membranes, we explore the impact of Marangoni flows in the process of nonsolvent induced phase separation. Such flows have been hypothesized to be important to the formation of macrovoids, but little quantitative evidence has been produced to date. Using a recently developed multifluid phase field model, we find that roll cells indicative of a solutal Marangoni instability are manifest during solvent/nonsolvent exchange across a stable interface. However, these flows are weak and subsequently do not produce morphological features that might lead to macrovoid formation. By contrast, initial conditions …

The Santa Clara, 2018-04-26, Santa Clara University

The Santa Clara

No abstract provided.

In Situ Defect Detection Using Three Color Spectroscopy In Laser Powder Bed Additive Manufacturing, Andrew Drieling

The University Honors Program

Additive Manufacturing (AM) provides a way to create parts that would be extremely difficult or impossible with conventional manufacturing processes. However, AM also introduces defects, which are detrimental to the mechanical performance. These defects are potentially unknown until post-processing inspection and testing, wasting time and resources on an unusable part or initiating unexpected failure. Historically, spectroscopy has successfully been used for in situ monitoring of laser welding, using changing parameters in the generated plume to predict defects. In situ monitoring using a visible spectrometer for fabrication of Alloy 718 on a test bed laser powder bed fusion system is performed. …

Rare Earth - Free Permanent Magnetic Material, Laura H. Lewis, Jeffrey E. Shield, Katayun Barmak Viziri

Department of Mechanical and Materials Engineering: Faculty Publications

The invention provides rare earth - free permanent magnetic materials and methods of making them . The materials can be used to produce magnetic structures for use in a wide variety of commercial applications , such as motors , generators , and other electromechanical and electronic devices . Magnets fabricated using the materials can be substituted for magnets requiring rare earth elements that are costly and in limited supply . The invention provides two different types of magnetic materials . The first type is based on an iron - nickel alloy that is doped with one or more doping elements …

Implantable Fluid Delivery System, Ihab Saab, Nathan Waters, Joel Carne, Lanie R. Belloli, Massoud Tavakoli

Mechanical Engineering Patents

An implantable system for delivering fluids , such as drugs , to one or more anatomical structures in a patient ' s ( i . e . , human or animal ) body . A number of medical conditions require continual and / or periodic administration of fluids ( e . g . , drugs ) to target regions ( e . g . , anatomic organs ) of the body . Accessibility to those target regions might be limited technically for ex . and not limited to : frequent endoscopic , radiologically guided or surgical approaches . The system …

Risk Analysis Of Autonomous Vehicle And Its Safety Impact On Mixed Traffic Stream, Plaban Das

Theses and Dissertations

In 2016, more than 35,000 people died in traffic crashes, and human error was the reason for 94% of these deaths. Researchers and automobile companies are testing autonomous vehicles in mixed traffic streams to eliminate human error by removing the human driver behind the steering wheel. However, recent autonomous vehicle crashes while testing indicate the necessity for a more thorough risk analysis. The objectives of this study were (1) to perform a risk analysis of autonomous vehicles and (2) to evaluate the safety impact of these vehicles in a mixed traffic stream. The overall research was divided into two phases: …

College Of Engineering News, Georgia Southern University

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

• GS Engineering Design Challenge 2018
• Aniruddha Mitra Receives Best Presentation Award
• Cameron Coates Receives USAF Summer Research Fellowship

A Strategic Audit Of Chegg, Jacob Melcher

Honors Program: Senior Projects (Public)

The paper researches and discusses the strategy of Chegg in the past and future with regards to what was taught in UNL’s MNGT 495H course. The data was compiled from online resources including the company’s website and financials along with insights learned during an internship and interviews done in the Summer of 2016 and Spring of 2018. The insights of how Chegg went from a textbook rental company to the student learning hub it is today include experienced leaders, acquisitions and mergers, and being ahead of the curve in the industry. The final recommendation for Chegg’s strategy is to widen …

Transcriptomics To Develop Biochemical Network Models In Cyanobacteria, Bridget E. Hegarty, Jordan Peccia, Ratanachat Racharaks

Yale Day of Data

Through targeted genetic manipulations guided by network modeling, we will create a flexible, cyanobacteria-based platform for the production of biofuel-precursors and valuable chemical products. To build gene-metabolite predictive models, we have characterized Synecococcus elongatus sp. UTEX 2973’s (henceforth, UTEX 2973) gene expression and metabolite production under a number of environmental conditions.

Analysis Of Photovoltaic Energy In The Eastern Kentucky Region And The Residential Financial Feasibility, Joshua A. Johnson

Morehead State Theses and Dissertations

A thesis proposal presented to the Faculty of the College of Business and Technology Morehead State University in partial fulfillment of the requirements for the Degree Master of Science by Joshua A. Johnson on April 25, 2018.

Mems Fabrication Of A Peristaltic Pump, Nicholas Amendola

Journal of the Microelectronic Engineering Conference

From Merriam-Webster dictionary, it states that peristalsis can best be described as "successive waves of involuntary contraction passing along the walls of a hollow muscular structure (such as the esophagus or intestine) and forcing the contents on- ward"[1]. The objective of this project was to create a peristaltic micropump at the Rochester Institute of Technology (RIT) Semiconductor and Microsystem Fabrication Laboratory (SMFL). Using Micro-Electro-Mechanical Systems (MEMS) to create a peristaltic pump to lower the energy used to move a uid through a tube. Using three single micro- machined micro-pumps in a straight line to create this type of action. Fabrication …

Emerging Technologies For The Pretreatment Of Lignocellulosic Biomass, Shady S. Hassan, Gwilym Williams, Amit Jaiswal

Articles

Pretreatment of lignocellulosic biomass to overcome its intrinsic recalcitrant nature prior to the production of valuable chemicals has been studied for nearly 200 years. Research has targeted eco-friendly, economical and time-effective solutions, together with a simplified large-scale operational approach. Commonly used pretreatment methods, such as chemical, physico-chemical and biological techniques are still insufficient to meet optimal industrial production requirements in a sustainable way. Recently, advances in applied chemistry approaches conducted under extreme and non-classical conditions has led to possible commercial solutions in the marketplace (e.g. High hydrostatic pressure, High pressure homogenizer, Microwave, Ultrasound technologies). These new industrial technologies are promising …

Employing H.264 Coarse And Medium Grain Scalable Video To Optimize Video Playback Over Passive Optical Networks, David Moore

Honors College Theses

In this work, we propose the use of Coarse Grain Scalable (CGS) and Medium Grain Scalable (MGS) H.264/AVC video to optimize video playback on passive optical networks (PONs) by investigating network performance metrics such as data delay, video delay, and video delay jitter. Video playback is improved by sequentially dropping layers of scalable video. Dropping just a single CGS enhancement layer results in improvements of up to 57% for both data and video delay. However, video delay jitter benefits the most with an improvement ranging from 47% to 87%. Surprisingly, dropping subsequent CGS enhancement layers does not significantly improve the …

Ducted Wind Turbine Optimization And Sensitivity To Rotor Position, Nojan Bagheri- Sadeghi, Brian T. Helenbrook, Kenneth D. Visser

University Faculty Publications and Creative Works

The design of a ducted wind turbine modeled using an actuator disc was studied using Reynolds-averaged Navier–Stokes (RANS) computational fluid dynamics (CFD) simulations. The design variables included the rotor thrust coefficient, the angle of attack of the duct cross section, the radial gap between the rotor and the duct, and the axial location of the rotor in the duct. Two different power coefficients, the rotor power coefficient (based on the rotor swept area) and the total power coefficient (based on the exit area of the duct), were used as optimization objectives. The optimal value of thrust coefficients for all designs …

Understanding The Thermal Properties Of Precursor-Ionomers To Optimize Fabrication Processes For Ionic Polymer-Metal Composites (Ipmcs), Sarah Trabia, Kisuk Choi, Zakai Olsen, Taeseon Hwang, Jae-Do Nam, Kwang J. Kim

Mechanical Engineering Faculty Research

Ionic polymer-metal composites (IPMCs) are one of many smart materials and have ionomer bases with a noble metal plated on the surface. The ionomer is usually Nafion, but recently Aquivion has been shown to be a promising alternative. Ionomers are available in the form of precursor pellets. This is an un-activated form that is able to melt, unlike the activated form. However, there is little study on the thermal characteristics of these precursor ionomers. This lack of knowledge causes issues when trying to fabricate ionomer shapes using methods such as extrusion, hot-pressing, and more recently, injection molding and 3D printing. …

Comparative Study Of Deep Learning Models For Network Intrusion Detection, Brian Lee, Sandhya Amaresh, Clifford Green, Daniel Engels

SMU Data Science Review

In this paper, we present a comparative evaluation of deep learning approaches to network intrusion detection. A Network Intrusion Detection System (NIDS) is a critical component of every Internet connected system due to likely attacks from both external and internal sources. A NIDS is used to detect network born attacks such as Denial of Service (DoS) attacks, malware replication, and intruders that are operating within the system. Multiple deep learning approaches have been proposed for intrusion detection systems. We evaluate three models, a vanilla deep neural net (DNN), self-taught learning (STL) approach, and Recurrent Neural Network (RNN) based Long Short …

Comparative Study: Reducing Cost To Manage Accessibility With Existing Data, Claire Chu, Bill Kerneckel, Eric C. Larson, Nathan Mowat, Christopher Woodard

SMU Data Science Review

“Project Sidewalk” is an existing research effort that focuses on mapping accessibility issues for handicapped persons to efficiently plan wheelchair and mobile scooter friendly routes around Washington D.C. As supporters of this project, we utilized the data “Project Sidewalk” collected and used it to confirm predictions about where problem sidewalks exist based on real estate and crime data. We present a study that identifies correlations found between accessibility data and crime and housing statistics in the Washington D.C. metropolitan area. We identify the key reasons for increased accessibility and the issues with the current infrastructure management system. After a thorough …

Method Of Fabricating A Continuous Nanofiber, Yuris Dzenis

Department of Mechanical and Materials Engineering: Faculty Publications

A method of fabricating a continuous nanofiber is described . The method includes preparing a solution of one or more polymers and one or more solvents and electrospinning the solution by discharging the solution through one or more liquid jets into an electric field to yield one or more continuous nanofibers . The electrospinning process ( i ) highly orients one or more polymer chains in the one or more continuous nanofibers along a fiber axis of the one or more continuous nanofibers , and ( ii ) suppresses polymer crystallization in the one or more continuous nanofibers . The …

The Matryoshka Effect: Usu Researchers Describe Underwater Phenomenon | College Of Engineering, Usu College Of Engineering

College of Engineering News

Researchers at Utah State University are sending cascades of water into a tank to uncover a mystery of fluid dynamics.

Method For Production Of Germanium Nanowires Encapsulated Within Multi-Walled Carbon Nanotubes, Mark Crocker, Rodney Andrews, Arumugam Pandurangan, Dali Qian

Center for Applied Energy Research Faculty Patents

A method is provided for producing germanium nanowires encapsulated within multi-walled carbon nanotubes. The method includes the steps of performing chemical vapor deposition using a combined germanium and carbon source having a general formula of GeR_(4-x)L_x, where x=0, 1, 2, or 3; R is selected from a group consisting of alkyl, cycloalkyl or aryl and L=hydrogen, halide or alkoxide and growing germanium nanowires encapsulated within multi-walled carbon nanotubes on a substrate. A reaction product of that method or process is also provided.

An Analysis Of Regional Airlines’ Response To The Pilot Shortage And How It Impacts Collegiate Pilots, Jared Samost

Honors Program Theses and Projects

According to the Air Line Pilots Association there is an acute shortage of qualified pilots willing to fly for regional air carriers due to a lack of benefits and pay (Pilot Supply and the Future of the Profession, n.d.). Other organizations, such as the Regional Airline Association (RAA), believe the pilot shortage is due to strict and lengthy eligibility requirements imposed recently by the governing body of aviation, The Federal Aviation Administration (FAA). The purpose of this project is to analyze the opposing views on the pilot shortage in the regional carriers and examine the recruitment efforts regional carriers utilize …

The Ozone Monitoring Instrument: Overview Of 14 Years In Space, Pieternel F. Levelt, Joanna Joiner, Johanna Tamminen, J. Pepijn Veefkind, Pawan K. Bhartia, Simon Carn, Et. Al.

Michigan Tech Publications, Part 1

This overview paper highlights the successes of the Ozone Monitoring Instrument (OMI) on board the Aura satellite spanning a period of nearly 14 years. Data from OMI has been used in a wide range of applications and research resulting in many new findings. Due to its unprecedented spatial resolution, in combination with daily global coverage, OMI plays a unique role in measuring trace gases important for the ozone layer, air quality, and climate change. With the operational very fast delivery (VFD; direct readout) and near real-time (NRT) availability of the data, OMI also plays an important role in the development …

Nanoreactors: Strategies To Encapsulate Enzyme Biocatalysts In Virus-Like Particles, Joshua W. Wilkerson, Seung-Ook Yang, Parker J. Funk, Steven K. Stanley, Bradley Charles Bundy

Faculty Publications

Enzyme-mediated biocatalysis is generally more selective and environmentally friendly and requires less energy than chemocatalysis. However, factors such as temperature, acidity and the presence of proteases can negate enzyme activity. Encapsulation in virus-like particles is one promising method to mitigate these difficulties. Encapsulation also can be used to create multi-reaction nanoreactors that increase process efficiency by isolating reaction intermediates. To successfully encapsulate enzymes, a variety of methods involving both non-covalent and covalent interactions have been developed. Here we review promising virus-like particle encapsulation strategies, their advantages and remaining challenges.

Social Contagion And Knowledge Acquisition In Construction Professional Service Firms, Oluwasegun O. Seriki, Roisin Murphy

Conference papers

The construction industry in Ireland, including professional service firms (PSF’s) operating therein, are undergoing a period of change and uncertainty driven by economic, demographic, political and technological factors. While considerable evidence exists demonstrating the relationship between environmental turbulence on organisational decision making, there remains a distinct lack of focus on behavioural patterns affecting decision-making process of construction firms. Social contagion (SC) theory asserts that the spread of ideas, attitudes, or behaviour patterns in a group is achieved through imitation and conformity, and is well established within social sciences research, and is increasingly being used to analyse organisational behaviour. However, limited …

Information Technology (It) For Strategy Formulation In Irish Quantity Surveying Firms: A Literature Review, Michael Adesi, Roisin Murphy, Dermot Kehily

Conference papers

The purpose of this study is to provide a critical review of existing studies on strategy to demonstrate the influence of information technology on strategy formulation in quantity surveying practices in Ireland. The paper focuses on the influence of IT on the strategic planning and decision making process of QS practices in Ireland. A key finding from the study supports the potential to apply dynamic capability theory emanating from the Resource Based View (RBV) of the firm to construction Professional Service Firms (PSF’s) in Ireland. The framework presented in this paper has the potential for advancing future research agenda focusing …

Career: Nanoscale Thermal Transport In Hydrogen-Bonded Materials, Ling Liu

Funded Research Records

No abstract provided.

Electrical & Computer Engineering News, Georgia Southern University

Electrical & Computer Engineering: News & Publications (2014-2023)

• Dr. Sungkyunn Lim, Array Antennas & Propagation Modeling

Waste Vegetable Oil Properties With Usage And Its Impact On Artisan Soap Making, Jenalyn Thorpe

Undergraduate Honors Theses

This thesis examines the impact of vegetable oil usage in industrial and home settings on the properties of the vegetable oil and how its usage in soap affects the final product. Waste vegetable oil (WVO) is often used to make soap as a way to be more environmentally-friendly and create soap at a low cost in developing countries. Two settings are examined: home usage (i.e. short-term, small-scale usage) and industrial (i.e. long-term, almost continuous usage). This thesis found that lightly used oil (household use) had little to no impact on the quality of the oil, except for its scent. This …

Evaluation Of A Novel Finite Element Model Of Active Contraction In The Heart, Xiaoyan Zhang, Zhan-Qiu Liu, Kenneth S. Campbell, Jonathan F. Wenk

Mechanical Engineering Faculty Publications

Finite element (FE) modeling is becoming a widely used approach for the investigation of global heart function. In the present study, a novel model of cellular-level systolic contraction, which includes both length- and velocity-dependence, was implemented into a 3D non-linear FE code. To validate this new FE implementation, an optimization procedure was used to determine the contractile parameters, associated with sarcomeric function, by comparing FE-predicted pressure and strain to experimental measures collected with magnetic resonance imaging and catheterization in the ventricles of five healthy rats. The pressure-volume relationship generated by the FE models matched well with the experimental data. Additionally, …