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College Of Engineering News, Georgia Southern University

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

• NSF Awards ERI Grant for Evaluating Bio-3D-printed Constructs

Review Article: Effect Of Co-Expression Chaperones On The Expression Of Intracellular Recombinant Proteins In Escherichia Coli, Diandra Firdiani Utami, Mamlikatu Ilmi Azizah, Sriwidodo Sriwidodo, Ryan Adibagus Haryanto, Riyona Desvy Pratiwi, Iman Permana Maksum

Chimica et Natura Acta

Escherichia coli is widely used as a host for expressing recombinant proteins due to its well-studied genetics, fast growth, relatively low production costs, and high rate of protein expression. However, despite the high rate of protein expression, the availability of chaperone proteins was often insufficient, resulting in the formation of inclusion bodies due to errors in protein folding. These inclusion bodies can cause the protein to become inactive, and proper protein folding is crucial for maintaining the structure and function of proteins in living organisms. To overcome this limitation, chaperones have been developed as a strategy to help prevent protein …

Analysis Of The Aerosol Composition, Its Deposition And Uptake In Electronic Cigarette Users, Chamodhi Ravihansi Polgampola Ralalage

Theses

Electronic cigarettes (e-cigarettes) generate aerosol (particles in a gas matrix) by vaporizing the e-liquid, consisting of propylene glycol (PG), glycerol (GL), nicotine, and other additives. Aerosol enters the respiratory tract (RT) of the user, where part of it is deposited, while the rest is exhaled. Compounds in the gas and particle phase have different deposition mechanisms in the RT, thus determining the location of deposition. The location of deposition and amount of a compound will influence the biological response in the body. Identifying the composition of each constituent in the gas phase and particle phase would enhance the understanding of …

Design, Synthesis, And Characterization Of Peptide Amphiphile Biomaterials, Huihua Xing

Theses & Dissertations

Self-assembled peptide amphiphiles (PAs) have gained significant attention in recent years due to their ability to form various supramolecular nanostructures with unique physical and chemical properties. These amphiphilic molecules consist of a hydrophobic tail and a peptide domain, allowing for the formation of nanoscale assemblies in aqueous environments. The PA supramolecular structures have a wide range of potential applications, including drug delivery, tissue engineering, and regenerative medicine.

By manipulating the driving forces (e.g., hydrophobic interactions, hydrogen bonds, and electrostatic interactions) involved in the self-assembly, researchers can tune the self- assembly properties (size, shape, stability, and surface character) and, consequently, the …

Understanding The Compositional And Contextual Factors Influencing Maternal Health Experiences And Outcomes, Tambudzai P. Ndashe

Theses & Dissertations

Despite being preventable, adverse maternal health outcomes continue to be a problem in the United States, which fares worse at preventing these issues than other industrialized nations. Although our understanding of the factors that play a role in the etiology of adverse maternal health outcomes has improved over time, there is still a lot left to understand regarding the role of contextual factors, the upward trajectory of outcomes such as severe maternal morbidity (SMM), and the disproportionate impact of adverse maternal health outcomes on non-Hispanic Black women. This thesis attempted to evaluate the factors that influence procedure-related severe maternal morbidity …

Securing Autonomous Driving: Addressing Adversarial Attacks And Defenses, Jinghan Yang

McKelvey School of Engineering Graduate Student Theses & Dissertations

Autonomous driving systems have gained significant attention in recent years, revolutionizing the transportation industry. However, the increasing complexity and connectivity of these systems introduce new challenges and vulnerabilities. This thesis addresses these challenges by investigating adversarial attacks and defenses in the field of autonomous driving. The thesis commences with a comprehensive literature review, providing insights into the vulnerabilities unique to image recognition and autonomous driving. It examines the cur- rent research lines for defense strategies and explores the ongoing efforts to mitigate these vulnerabilities. In the subsequent sections, the thesis presents four core contributions in adversarial attacks and defenses. Section …

Cornerstone: 2023-2024 [2nd Edition], Nikki Harken, Deb Young, Sadé Barfield, Scott Bredman

Faculty Book Gallery

The Cornerstone textbook is a free, custom textbook for you, published by Rod Library. It is a compilation of materials from more than six free, openly-licensed textbooks. Your Cornerstone instructors carefully selected the best of the best for your course! -- Provided by the publisher

In Situ Characterization Of 17-4ph Stainless Steel By Small-Angle Neutron Scattering, Xiaoming Du, Rongdeng Liu, Bing Bai, Xinfu He, Kaitai Liu, Shuanzhu Wang

Faculty, Staff and Student Publications

17-4PH martensitic steel is usually used as valve stems in nuclear power plants and it suffers from thermal aging embrittlement due to long-time service in a high-temperature and high-pressure environment. Here, we characterized the evolution of microstructures at the nano-scale in 17-4PH steel by in situ small-angle neutron scattering (SANS) with a thermo-mechanically coupled loading device. The device could set different temperatures and tensile so that an in situ SANS experiment could dynamically characterize the process of nanoscale structural changes. The results showed that with increasing thermal aging time, the ε-Cu phase precipitates and grows as the temperature is 475 …

Coral Castles: Protecting Polyps From Parrotfish Predation, Kyle Anthony-Kicking Bear Pisano

All HCAS Student Capstones, Theses, and Dissertations

Florida's coral reefs are in a state of near-constant degradation concomitant with ever-increasing coastal development and associated anthropogenic impacts. Government agencies, non-profits, and concerned citizens have spent significant time and resources combating these negative impacts. One primary method of mitigating damage to coral reefs is to transplant corals onto degraded reefs using corals that have been grown in nurseries. While many challenges of reef restoration have been overcome, parrotfish predation on freshly transplanted corals persists as a significant issue. Parrotfish are recognized as an essential species on healthy reefs but can also hinder reef restoration efforts by biting young, newly …

The Plastic Pandemic: Examining Surgical Face Mask Degradation In The Marine Environment In Times Of Covid-19, Christopher J. Mayer

All HCAS Student Capstones, Theses, and Dissertations

The development and use of single-use plastics skyrocketed with the onset of the COVID-19 pandemic in 2020. With the support of world governments, manufacturing companies exponentially increased their output of personal protective equipment (PPE), and wearing surgical grade face masks became a ubiquitous aspect of reopening public society as they proved to significantly reduce the spread of the SARS-CoV-2 virus. Over the course of the pandemic, however, environmental researchers began taking note of the improper disposal and increased waste of face masks and other pandemic-associated PPE throughout a wide range of environments.

This study assessed metrics of degradation of black …

Review, Dark Mirror: Edward Snowden And The American Surveillance State, By Barton Gellman, Patrice Mcdermott

Secrecy and Society

No abstract provided.

Review, Democracy And Fake News: Information Manipulation And Post-Truth Politics, Peter Krapp

Secrecy and Society

No abstract provided.

Daunting Encounters: La Hague’S Infrastructures Of Secrecy, Agnes Villette

Secrecy and Society

The article explores secrecy, more particularly, nuclear secrecy in relation to two nuclear facilities situated at the tip of the Norman peninsula of La Hague, in France. Both sites - the CSM nuclear waste repository and the close-by refueling plant - were developed at the end of the 1960s in connection with France’s extensive civil and military nuclear program. While institutional archives and access to the sites remain tedious, the article contends that the nuclear secrecy shielding the facilities can be approached by unpacking the numerous accidents that took place at the site. Silenced and subjected to amnesia, spills and …

Environmental Scan Of Web-Based Consumer Information On The Risk Of Hpv-Related Diseases In Patients With Systemic Lupus Erythematosus, Contessa T. Radabaugh, Juan I. Ruiz Md, Mph, Maria E. Suarez-Almazor Md, Phd

Summer Experience 2023

No abstract provided.

Kulr One Space, Chase Rodriguez

Small Satellite Conference

Small spacecraft battery packs are both mass and cost prohibitive if they are to meet the thermal runaway requirements for manned missions. Exploratory Mission 1 (EM-1), also known as Artemis 1 had 13 secondary, intended small spacecraft payloads. Many of these payloads would have exceeded the 80WHr energy threshold, and these would have been required to adhere to thermal runaway standard JSC 20793. All 13 payloads were covered under the EM-1 thermal runaway waiver for secondary payloads; however, EM-2 is not expected to grant such waivers. Further, the EM-2 secondary small spacecraft payloads are growing in size and the battery …

Adaptive On-Board Signal Compression For Sar Using Machine Learning Methods, Craig Hay, Lucy Donnell, Charlotte Crawshaw, Murray Ireland, Mehrdad Yaghoobi

Small Satellite Conference

Satellites with synthetic aperture radar (SAR) payloads are growing in popularity, with a number of new institutional missions and commercial constellations launched or in planning. As an active instrument operating in the microwave region of the electromagnetic spectrum, SAR provides a number of unique advantages over passive optical instruments, in that it can image in all weather conditions and at night. This allows dense time-series to be built up over areas of interest, that are useful in a variety of Earth observation applications. The polarisation and phase information that can be captured also allows for unique applications not possible in …

Extension Of Cloud Computing To Small Satellites, Kathryn O'Donnell, Meghan Weber, Joy Fasnacht, Jeff Maynard, Margaret Cote, Shayn Hawthorne

Small Satellite Conference

Time-to-insight is a critical measure in a number of satellite mission applications: detection and warning of fast-moving events like fires and floods, or identification and tracking of satellites or missiles, for example. Current data flows delay the time-to-insight on the order of minutes or hours, as all collected data must be downlinked in one or more contact windows, then transited over terrestrial networks to the location of the analytic software. Additionally, mission applications on spacecraft are often static: built prior to launch, they cannot rapidly adapt to changing needs based on these insights.

To reduce time-to-insight and provide a dynamic …

Nasa Space Launch System Cubesats: First Flight And Future Opportunities, Russell Lane, Courtney Ryals, Carole Mclemore, David Hitt

Small Satellite Conference

On Artemis I, within the integrated SLS upper stage under the Orion spacecraft, there were 10 6U CubeSats. The spacecraft all had different mission objectives, ranging from studying the lunar surface for water and minerals, landing on the Moon, studying deep space radiation, studying the Sun, studying Earth-Moon LaGrange Point 2, and characterizing a near-Earth asteroid, to name a few. This paper discusses the conditions of the CubeSats’ flight on the Space Launch System (SLS) rocket and their deployments. Statistics concerning the 10 CubeSats will be provided relating to radio contact and mission performance. For those still in operation at …

Attitude Determination And Control System With Variable-Speed Single-Gimbal Control Moment Gyroscopes For Nanosatellites, Jordan H. Hsieh, Thomas Yen, Sam Lee, Austin Chang, Luke Hou

Small Satellite Conference

This paper presents a novel Attitude Determination and Control System (ADCS) utilizing Variable-Speed Control Moment Gyroscopes (VSCMG) tailored explicitly for nanosatellites. The VSCMG was realized by spherical motor technology, in which a patented magnetic field design controls the inner rotor and gimbal. Because of the characteristics of the control moment gyroscope, the proposed ADCS offers improved attitude maneuverability and reduced power consumption, addressing the limitations of traditional ADCS solutions for nanosatellites. Furthermore, the adoption of spherical motor technology shrinks the VSCMG into a smaller form factor, which allows the VSCMG to be fitted into a nanosatellite. This research paper introduces …

An Update On The Virtual Mission Control Room, Felix Sittner, Oliver Hartmann, Sergio Montenegro, Jan-Philipp Friese, Larissa Brübach, Marc Erich Latoschik, Carolin Wienrich

Small Satellite Conference

In 2021 we presented the Virtual Mission Control Room (VMCR) on the verge from fun educational project to testing ground for remote cooperative mission control. Since then, we successfully participated in ESA's 2022 campaign "New ideas to make XR a reality", which granted us additional funding to improve the VMCR software and conduct usability testing in cooperation with the chair of human-computer-interaction. In this paper and the corresponding poster session we give an update on the current state of the project, the new features and project structure. We explain the changes suggested by early test users and ESA to make …

Designing A Model-Based Systems Engineering (Mbse) Template For Satellites, David Walker, Dan Christensen, Brad Mercer, Gavin Payne

Small Satellite Conference

The goal of this project has been to digitally transform SDL systems engineering methods for scoping small satellite missions, developing system architectures, documenting the engineering solution, and verifying design solutions from being document-intensive (gathering non-transformable information in discrete, disjoint documents) to being model-based (employing cohesive, traceable, transformable graphical models).

We have produced a set of models that give satellite development programs (and any "model-based" program) a head start that enables the modeling effort to drive the systems engineering process instead of catching up with a document-driven design. We plan to use these models to develop, train, and encourage consistent modeling …

The Arkisys Port Module: An Orbital Platform For Hosted Payloads In Low-Earth Orbit, Rahul Rughani, David A. Barnhart, Dan Lopez

Small Satellite Conference

Advances in Small Satellite technology combined with the availability of low-cost rideshares to Low-Earth Orbit (LEO) have led to an increasing number of space missions. However, the underlying technology for small payload missions has been relatively constant over the past two decades: CubeSat form factor platforms for free-flying missions in LEO. Arkisys is working to change this, and allow a wider variety of payloads to reach LEO which don't include an immediate free-flying requirement. This platform is called The Port, and is an autonomous long-duration orbital platform for a multitude of uses, including hosting payloads in LEO.

Currently, avenues …

The Rogue Alpha And Beta Mission: Operations, Infrared Remote Sensing, Leo Data Processing, And Lessons Learned From Three Years On Orbit With Two Laser Communication-Equipped 3u Cubesats, Dee W. Pack, Pradeep Thiyanaratnam, Brian S. Hardy, Tom Freeze, John R. Santiago, David Pietrowski, Michael Leon

Small Satellite Conference

The Aerospace Corporation's Rogue-alpha, beta program was a rapid prototyping demonstration aimed at building and deploying an infrared remote sensing capability into low Earth orbit within 18 months. The two satellites and their data were then used for three years as an experimental testbed for future proliferated low Earth orbit (pLEO) constellations. Their launch took place on November 2, 2019, followed by boost and deployment of two identical spacecraft (Rogue-alpha and beta) by the Cygnus ISS cargo vessel into circular 460-km, 52° inclined orbits on January31, 2020. The primary sensors were 1.4-micron band, InGaAs short wavelength infrared (SWIR) cameras with640x512 …

Esep: An Experimental Onboard Computing System For Localized Capacity Building And Future Philippine Microsatellites, Kenneth John Ibarra, Floyd Ferrant Fortes, Elaiza Pontrias, Victor Joseph Ochave, Gracielle Capardo, Noniel Paul Novabos, Julie Ann Banatao, Marc Caesar Talampas

Small Satellite Conference

The Experimental Science & Engineering Payload (ESEP) platform is a bus and payload system designed to host and perform the functions of the primary components of a satellite bus system. This engineering platform is intended to act as an experimental redundant bus & payload system to the primary Diwata-2 system. This will allow testing of experimental bus and payload modules which will then be the base platform for future satellite developments in the Philippines for small satellites. The bus segment consists of the satellite command & data handling, satellite attitude control & management, and the communications subsystem. Consequently, the mission …

Highly Miniaturized Swir Off-The-Shelf Camera Head For Space Applications, Julien Bezine, Charles Sellier, Ange Djouaka Nguimfac, Clément Delahouliere, Paul Serrano, Wissam Durand-Mouallem, Jean-Marc Belloir, Valerian Lalucaa, Cédric Virmontois

Small Satellite Conference

3D PLUS has developed in the framework of its camera products development, and in collaboration with the Centre National d'Etudes Spatiales (CNES), an off-the-shelf highly miniaturized SWIR camera head for space applications. This opto-electronic module has been integrated using 3D PLUS packaging technology and electronics design expertise to design a product as compact and optimized as possible, suitable for wide range of space applications. This poster presents the development and manufacturing of 3D PLUS 3DCM830 SWIR Space Camera Head.

Using Space Games Like Simplerockets, Spaceflight Simulator, And Kerbal Space Program To Teach Kids Orbital Mechanics, Ryan Cahoy, Joey Murphy

Small Satellite Conference

Kids love space exploration, but they do not necessarily know how rockets and spacecraft actually work. Kids can use space-themed games based on physics to learn more about how metal cylinders full of propellant move and interact in space while still having fun. We talk about our example videos with a focus on kid space fans to help them get started. We use games that are currently available in stable releases, starting first with basic concept 2D games like Simple Rockets, and then to Spaceflight Simulator, which is also 2D. From there, we give examples of progressing to 3D motion …

Nasa Operational Simulator For Smallsats (Nos3) – Design Reference Mission, John P. Lucas, Matthew D. Grubb, Justin R. Morris, Mark D. Suder, Scott A. Zemerick

Small Satellite Conference

The NASA Operational Simulator for Small Satellites (NOS3) has undergone significant advances including updating the framework to be component based and expanding the open-source code to include a generic design reference mission to enable advanced technologies. This paper details the changes to the framework as well as a number of innovative use-cases the team is currently supporting such as 1) the expansion of NOS3 to support distributed systems missions in collaboration with NASA GSFC, 2) the integration of NASA JPL’s Science Yield improvemeNt via Onboard Prioritization and Summary of Information Systems (SYNOPSIS) for on-orbit science data prioritization, and 3) the …

Enabling Mission Success: A Student's Perspective On Developing A Ground Station, Sean Svihla, Adrian Bryant, Lucia Witikko

Small Satellite Conference

In recent years, The University of Colorado Boulder’s Laboratory for Atmospheric and Space Physics (LASP) has grown its SmallSat Operations (SMOPS) program into a large team of students and professionals managing the operations of multiple SmallSat missions. The team responsible for the on-site ground station (GSOPS) includes a small team of students alongside professionals who help manage the on-site UHF and S-band antennas, making use of open-source, commercial, and in-house software. In this process, the student ground station team has adapted the limited time and resources of a single ground station to accommodate the needs and science objectives of multiple …

Educational And Real-World Satellite Mission Operations Center At The Us Naval Academy, Noah Loftis, Ethan Schneider, Christine Maceo, Jin S. Kang, Michael Sanders

Small Satellite Conference

For successful satellite missions at the United States Naval Academy (USNA), a critical element is the
/="/">establishment of a capable and dynamic Satellite Mission Operations Center (SOC). In addition to powerful hardware, flexibility and adaptability allow the SOC to continue to support operations, even as new protocols arise and communication architectures change with the rapid pace of small satellite advancement. Software-defined radios (SDRs) provide the necessary flexibility for the SOC to easily change configurations and network with other ground stations. However, the resulting high-tech, turn-key operations of an advanced SOC tend to alienate students from hands-on learning experiences. The …

The U.S. Government's Global Food Security Strategy And The Effectiveness Of Agriculture-Led Growth Through The Perspectives Of Climate Change And Sustainability, Marcella Mcnerney

Capstone Collection

The United States Agency for International Development’s (USAID) Global Food Security Strategy Fiscal Year 2022-2026 addresses food security in developing countries. The U.S. Global Food Security Strategy set forth by USAID lays forth a strategy for increasing food security in twelve targeted low-income and developing nations. How well the USAID policy does this with consideration of climate change, sustainability, and socio-economic well-being is crucial to examine given the fact that climate change impacts and predictions are now affecting food systems at all stages, from growth through production. The following discussion combines elements of a policy brief and research paper to …