Digital Commons Network^™

I Think I'M Falling For You: Xvi Mission's Final Days In Orbit, Lee Jasper, Erika A. Chavez, Andrew A. Knuth, Adam T. Reinelt, Cameron Shideler, Jayce Thedford, Declan Byrne, Michael Dompke

Small Satellite Conference

The Air Force Research Lab’s (AFRL) Small Satellite Portfolio (SSP) created the XVI CubeSat which was launched on SpaceX’s Transporter 8 in June of 2023. 

XVI remained operational from June 2023 until its deorbit on January 7, 2026. Throughout its lifetime, the team maintained the vehicle and used XVI for experimentation and training purposes. However, due to the sun's low activity around this time frame, and intentionally lowering the drag/cross sectional area of XVI on orbit, the spacecraft was able to stay in orbit for months beyond its initial predicted re-entry. 

Between January 4th and January 7th, XVI was tracked …

Student-Led Operational Framework And Initial On-Orbit Lessons Learned In Multifunctional Membrane Mission Helios-R, Daichi Ishido, Masanori Matsushita, Yuki Takao, Ahmed Kiyoshi Sugihara, Osamu Mori, Tetsuya Kusumoto, Yukiho Ohtsuki, Yuto Nakagawa, Haruhito Ohki, Kaho Nakagawa, Shusaku Tsuruya, Masaaki Shigematsu, Fumiya Aono, Kaine Amakawa, Akihiro Kushima, Ayumu Kawasaki, Jiro Takada, Hinata Yamamoto, Reiji Kobayashi, Ryuki Shimizu, Hiroaki Yoneda, Hirona Kawahara, Junya Taguchi, Satsuki Yokohori, Tomoyo Shibata, Kazuki Hamatsuki, Mao Takata, Toshiyuki Hori, Hiroaki Ito, Akihito Watanabe, Sota Kume, Atsuki Ochi, Takuma Komaba, Hiraku Sakamoto, Atsushi Shirane, Kenichi Okada, Ayako Torisaka, Nobukatsu Okuizumi, Yasutaka Satou, Yasuyuki Miyazaki, Atsuhiko Senba

Small Satellite Conference

To enable a broad range of space activities, small satellites require innovative solutions for lightweight, high-power generation. HELIOS-R (Harvesting Energy with Lightweight Integrated Origami Structure), co-developed by JAXA, Institute of Science Tokyo, and Sakase Adtech Co., Ltd., is a pioneering multifunctional membrane component. Launched in December 2025 as part of the RAISE-4 mission, it integrates thin-film solar arrays, a 5G array antenna, and an interferometer antenna on a 1-meter equilateral triangular membrane. This paper details a reliable operational framework developed by a diverse, student-led team from JAXA/ISAS to address stringent operational constraints and technical challenges arising from severe launch delays. …

Long-Term Software-Defined Formation Flying And Its Application To Space Mimo Communications, Takaya Inamori, Keita Tanaka, Kiyoshi Kinefuchi, Shigeru Sunada, Yousuke Kawabata, Ayumu Nono, Takumi Noro, Yukihisa Otani, Norihide Miyamura, Eiji Okamoto, Yuma Abe, Yoshimi Fujii, Hiroyuki Tsuji, Takuya Okura, Rei Kawashima, Takuto Ogawa, Tomoyuki Miyashita

Small Satellite Conference

Formation flying of multiple small satellites is expected to enable novel space missions that cannot be achieved by a single satellite. Small sized satellites are strongly affected by environmental disturbances and have strict constraints on mass, volume, and power. This study focuses on characteristics that become prominent as satellites are miniaturized, such as the increased influence of space environment and enhanced interactions among onboard components. By utilizing these effects, the research aims to realize propellant-less, software-defined formation flying. The proposed technologies are applied to space MIMO (multiple input multiple output) communications, in which communication capacity is improved by controlling the …

Advancing Wavelet-Adaptive Interference Cancellation To Enable Cubesat Constellations For High-Fidelity Ac Magnetometry, Surya S. Kalluri, Alex P. Hoffmann, Mark B. Moldwin, James W. Cutler, Yethinder Ragav Lakshmi Kumar, Lauro V. Ojeda

Small Satellite Conference

Dense CubeSat constellations equipped with science-grade AC magnetometers offer a transformative path toward high spatial and temporal resolution of several magnetospheric phenomena that large spacecraft missions cannot resolve. Realizing this vision demands boomless magnetometry– due to deployment risks and resource constraints on nano/micro satellite platforms in large scale –capable of operating in the presence of intense spacecraft-generated electromagnetic interference without the spatial separation that conventional booms provide. This paper advances the characterization of the Wavelet-Adaptive Interference Cancellation for Underdetermined Platforms (WAIC-UP) algorithm across different frequency regimes and two distinct classes of test data. In the 50 Hz to 30 kHz …

Toward Trainable Ai Agents For Satellite Operations, Haley Calderon, Vaibhav Bhosale, Ketan Bhardwaj, Ada Gavrilovska

Small Satellite Conference

Low Earth orbit is increasingly crowded, and a growing share of it is flown by universities and small operators. These teams must detect and respond to on-orbit anomalies with far less staff, expertise, and tooling than large operators, and a single missed anomaly can end a mission. We present COMET, a ground-based operator agent that helps a small team both detect anomalies and diagnose them. COMET pairs a learned detector with a retrieval-augmented diagnosis stage. An LSTM autoencoder flags anomalous telemetry windows, and a language model explains each one against the mission’s own documentation, procedures, and prior operational records. Because …

Itasat2 Conceptual Architectural Design Of A Multi-Band Communication Framework For Distributed Cubesat Formation Operations, Renan Guilherme Soares Menezes, Edson Wander Do Rego Pereira, Bruno Leonardo Schuster, Pedro Casarin, Pedro Henrique Antero Lira, Luiz Fernando Da Cunha Silva, Matheus Esteves, Lidia Shibuya Sato, Ana Di Iorio, Luis Eduardo Vergueiro Loures Da Costa

Small Satellite Conference

The growing operational complexity of distributed CubeSat missions in Low Earth Orbit (LEO) demands communication architectures that provide robustness, responsiveness, and mission-level adaptability. The ITASAT2 mission, composed of three coordinated CubeSats operating in controlled relative motion, serves as a representative case to investigate how a multi-layer communication architecture can support formation flying, responsive maneuver planning, space situational awareness (SSA), distributed payload operations, and increasing levels of onboard autonomy within strict SWaP constraints. This paper proposes and analyzes a multi-band communication architecture designed to improve both operational resilience and communication responsiveness. The architecture combines a primary telemetry, tracking, and command (TT&C) …

Pulse-Q: Space-To-Ground Quantum Key Distribution At The Cubesat Form Factor, Logan Hanssler, Stewart Kristiansen, Ellisian King, Neha Chandran, Unnathi Venkatesh, Selina Gao, Nelson Chan, Mika Sadikario, Joseph Sorel, Lexi Liu, Eleanor Gentry, Rohan Gupta, Juan Ignacio Prieto Asbun, Lauren Ayala, Vincent Redwine, Tian Zhong

Small Satellite Conference

Motivation 

• Quantum key distribution (QKD) offers provably secure communication regardless of the technology available to potential eavesdroppers.
• Space-to-ground QKD facilitates long-distance key distribution without costly terrestrial infrastructure.
• The Polarization-modUlated Laser Satellite Experiment – Quantum (PULSE-Q) is a 12U CubeSat mission to leverage recent innovations in compact quantum sources and optical communication to achieve space-to-ground QKD.

The Dual Impact Of Professional And Community Interventions On Recidivism, Anjelika M. Dillard

Master of Arts in Human Services

This capstone project evaluates the effectiveness of professional and community interventions in reducing criminal recidivism and facilitating successful community reintegration for justice-involved individuals. Grounded in the Risk-Need-Responsivity (RNR) model, Desistance Theory, and Trauma-Informed Care frameworks, this study synthesizes contemporary behavioral health and criminological literature to examine how institutional programming and post-release community support interact to foster long-term behavioral change. The findings demonstrate that while evidence-based institutional treatments—such as Cognitive-Behavioral Therapy (CBT), Dialectical Behavior Therapy (DBT), and targeted vocational training—provide essential foundations for cognitive restructuring and skill acquisition, institutional programming alone is insufficient to prevent re-offending. Long-term desistance depends on an …

Feedback Indices To Evaluate Llm Responses To Rebuttals For Multiple Choice Type Questions, Justin C. Dunlap, Anne-Simone Parent, Ralf Widenhorn

Physics Faculty Publications and Presentations

We present a set of indices designed to characterize Large Language Model (LLM) responses when challenged with rebuttals during a chat. Assessing how LLMs respond to user dissent is crucial for understanding their reliability and behavior patterns, yet the complexity of human-LLM interactions makes systematic evaluation challenging. Our approach employs a fictitious-response rebuttal method that quantifies LLM behavior when presented with multiple-choice questions followed by deliberate challenges to their fictitious previous response. The indices are specifically designed to detect and measure what could be characterized as sycophantic behavior (excessive agreement with user challenges) or stubborn responses (rigid adherence to the …

Processor And Sensor Interfacing On Fpga For Stp-H12-Vantage Space Mission, Christopher Brubaker, Alan D. George

Small Satellite Conference

Previous SHREC Missions

• STP-H5-CSP – Demonstration of CSP and hybrid COTS + rad-hard architecture
• STP-H6-SSIVP – Parallel and distributed computing with multiple CSPs
• STP-H7-CASPR – Onboard processing with next-gen sensors and apps

STP-H12-VANTAGE

• Visual And Neuromorphic Tracking And Geosensing Experiment
• Correlation of neuromorphic and visual sensor data
• Advancing usage of COTS SoMs supplemented with rad-hard monitoring and watchdog circuitry

Onboard Ai At The Orbital Edge: A Mission Debrief From Stp-H7-Caspr, Evan W. Gretok, Linus Silbernagel, Diego Wildenstein, Michael J. Cannizzaro, Seth Roffe, Alan D. George

Small Satellite Conference

Goals: Enable autonomous Earth observation and onboard sensor data processing with novel compute

Motivations: Growing numbers of spacecraft demand autonomy in operation and data collection

Challenges: Harsh radiation and thermal environment of space over four-year mission lifetime

A Comparative Analysis Of Radio Frequency And Optical Inter-Satellite Link Communications For Leo Mega-Constellations, Alexa Houck, Suryansh Aryan, Kevin Schroeder, Samantha Kenyon

Small Satellite Conference

SpaceNet design  

Software-based testbed for simulating large satellite networks, specifically LEO-based constellations to analyze network behavior, connectivity, routing, and overall communication.  

• Phase one focuses on connectivity and routing: Given the topology and link availability over time, how does my network behave? 
• Phase two focuses on network emulation: Given the topology and link availability over time, how does my network behave? 

Arcsecond-Level Pointing Accuracy In A Cubesat: Development And Verification Of The High-Precision Pointing System For The Cubespec Mission, Leonardo Peri

Small Satellite Conference

Mission and objectives 

CubeSpec is a 12U CubeSat mission designed to demonstrate high-resolution stellar spectroscopy from a small, low-cost space platform. 

Its scientific objectives require the payload line-of-sight to remain stable within a few arcseconds. This is beyond the capability of conventional CubeSat Attitude Determination & Control Systems (ADCS). 

To meet this challenge, CubeSpec uses a dual-stage pointing architecture: the spacecraft ADCS provides coarse body pointing, while a High-Precision Pointing Platform applies fast, precise corrections directly to the payload line-of-sight.

Snack Protocol For Reliable High-Throughput Data Transfer On Mtu-Constrained Low-Cost Uhf Radios, Samantha Mallari, Dennis Sarsozo, Miguel Nunes

Small Satellite Conference

• Student CubeSat missions using sub-$100 UHF radios are constrained by small packet sizes, making standard protocols (e.g., TCP, CFDP) too overhead-intensive for payload downlinks.  
• We developed a Selective Negative Acknowledgement (SNACK)-based protocol for the Artemis CubeSat Kit bus to support reliable 160 × 120 LWIR thermal image transmission for the CubeSats for Climate Change Monitoring (C3M) mission  
• A 45-byte SNACK bitmap acknowledges up to 360 packet fragments, minimizing retransmission overhead.  
• Field tests from 5 m to 1.6 km achieved 72.2 kbps peak throughput and ≥98.7% final data integrity.

Autonomous Microelectronics See Payload For Validating Terrestrial Predictions In Space, Michael A. Blacconiere, Isaac Hudson, John W. Burgoon, Terrance Sacks, Spencer Westfall, Sajal Islam, Davidson Juhke, George Randel, Jared Harvey, Merek Chertkow, Daniel Loveless

Small Satellite Conference

The radiation environment in space is complex and time-varying, causing major risks for microelectronic applications. Terrestrial radiation sources are used to characterize devices before missions to predict in-orbit error rates. However, these predictions are rarely validated in deployment. The payload, designed by IU CREATE and The Radiation Team, the IUB-SAT-1, integrates IU’s RadFX-IC and commercial SRAMs with well-characterized terrestrial radiation responses into a modular payload to collect on-orbit radiation-response data. Results will refine radiation error-rate models and improves confidence in deploying advanced microelectronics to radiation-rich space environments.

Bit-Flip Sensitivity And Selective Fp32 Protection For Onboard Neural Networks In Flight Software: In-Place Secded Healing Of An Fp32 Weight Buffer Inside Nasa Cfs, Ryan Goodman, Carson Cramer, Braden Eichmeier, Emily Gerber, Christopher Roscoe

Small Satellite Conference

Smallsat missions increasingly deploy neural networks on COTS processors. In orbit, a charged particle striking such a device can flip a single bit of memory, a single event upset (SEU). An upset in a network weight raises no fault condition: the network continues to run, returns incorrect values, and the control loop downstream acts on them. 

The standard cFS response to memory corruption is process restart, which interrupts service and discards runtime state.

In-Transit Debris Remediation: Dual-Use Logistics For Sustainable Cislunar Smallsat Constellations, Wanjiku Chebet Kanjumba

Small Satellite Conference

A Debris Crisis Meets A Logistics Boom: Low- and high-Earth orbit keep accumulating debris faster than the atmosphere can clear it, even as NASA's Artemis and CLPS programs establish routine trans-lunar traffic. The 2009 Iridium-Cosmos collision and later anti-satellite tests proved that single fragmentation events can irreversibly degrade critical orbital shells, raising the specter of Kessler Syndrome. 

• 46,600+ objects tracked on orbit today, with ~130 million sub-cm fragments (ESA, 2025)
• $500K-$2M cost per kilogram for dedicated ADR, fiscally intractable at system scale
• 5-10 / yr large objects must be removed to stabilize LEO (Liou & Johnson)

The Unit-Economics Problem: Purpose-built …

Numerical Characterization Of Phase Coherence In Distributed Smallsat Sar Interferometry, Cameron Kaminski

Small Satellite Conference

Distributed SmallSat SAR requires independent spacecraft to maintain phase coherence over long integration times. This work presents a Monte Carlo simulation that combines manufacturer-derived oscillator phase noise, spacecraft thermal dynamics, and orbital perturbations to evaluate passive coherence limits. The results show that oscillator quality alone is insufficient; differential thermal-state evolution becomes a dominant driver of long-duration coherence performance.

F Prime To Flight Faster: Hardware-In-The-Loop Continuous Integration For Accelerated Cubesat Development, Nate Gay, Saidi Adams, Michael Pham

Small Satellite Conference

Flight software teams iterate quickly in development and then slow down at integration, because the software must be validated against real hardware that is itself still changing. 

Bench testing is manual, intermittent, and happens late. Defects surface days after the commit that caused them, once the context is gone and the change has been built on.

Promoting Assured Formation Flight Autonomy Onboard Resource Constrained Systems, Ryan Johnson, Maggie Michelsen, Jackson Gardner, Mario Harper, Charles Swenson, Jackson Kulik, Shawn Jones

Small Satellite Conference

Autonomously determining fuel-optimal, formation-keeping trajectories for small spacecraft operating in formation flight is often limited by available processing power. Because SmallSat missions are constrained by size, weight, and power (SWaP), field-programmable gate arrays (FPGAs) are an attractive option for onboard computing. Traditional formation-keeping relies on convex optimization to solve for fuel-optimal burns and burn times; however, implementing these solvers on FPGAs is challenging due to limited board resources.

To address the need for fast, reliable trajectory planning onboard space vehicles, we investigate leveraging machine learning to reduce computational cost for real-time, onboard execution. We propose using a deep neural network …

Speaking In Color: Code-Meshing Against Standard Language Ideology In The Public Speaking Classroom, Darrion A. Walker

Journal of Communication Pedagogy

Public speaking courses do more than teach presentation skills; they also teach students which voices count as credible. In Predominantly White Institutions (PWIs), instructional norms tied to standard language ideology position standardized English as the unmarked benchmark of professional communication. For students who speak African American Language (AAL) or other culturally informed language varieties, this creates a double bind: conform linguistically or risk being penalized for rhetorical authenticity. This reflective essay identifies the double bind as an underexamined problem in communication pedagogy and suggests that code-meshing—the intentional blending of multiple language varieties within a single communicative act—offers a more equitable, …

Decolonizing Communication Pedagogy: Toward An Afro-Rhetorical Framework, Lionnell Smith

Journal of Communication Pedagogy

This essay introduces Afro-rhetorical pedagogy as a decolonial framework for communication pedagogy. Building on Adam Key’s 2022 call for an Applied Africana Studies framework for public speaking pedagogy, this essay conceptualizes Afro-rhetorical pedagogy grounded in Afrocentric thought and African communication theory. Through a close reading of Molefi Kete Asante’s 2011 address on African curriculum, this essay establishes three foundational principles for Afro-rhetorical pedagogy: (a) epistemological agency, (b) decolonized knowledge production, and (c) institutional reconstruction. This pedagogical framework addresses communication education’s reproduction of white cultural hegemony by promoting African-centered principles, practices, and precepts that reposition communication pedagogy as a more liberatory …

Meeting Rhetorical And Relational Goals In Online Higher Education: Insights From A South African Case Study, Rentia Du Plessis, Diana Breshears, Luzelle Naudé Prof

Journal of Communication Pedagogy

This qualitative study examines the degree to which synchronous and asynchronous online learning platforms both supported and constrained the achievement of rhetorical and relational goals in a resource-constrained South African higher education context. As online teaching practices persist in the post-COVID era, understanding how to design pedagogically sound online environments is increasingly important, particularly in the Global South where cost, access, and connectivity pose significant constraints. Drawing on the Rhetorical and Relational Goals Theory (RRGT; Mottet et al., 2006) and Kaufmann et al.’s (2016) online learning climate dimensions, the study analyzes undergraduate students’ perceptions of Blackboard Collaborate, PowerPoint voice-overs, WhatsApp, …

Experimental Investigation On Nanocellulose And Aluminium-Oxide Hybrid Nanofluid As A New Coolant For Radiator, D. Ramasamy, Sivaraos Sivaraos, K. Kadirgama

The Nexus of Sustainability and Energy Technology Journal

Improved efficiency leads to more compact design of the radiator. The research is conducted to prove that addition of Aluminium Oxide and nanocellulose originating from plant base with varying concentration provides a better thermal efficiency compared to usage of distilled water as radiator coolant. The objective of the research is to improve a new radiator coolant based on combination of aluminium oxide and nanocellulose with readily available coolants which is Ethylene Glycol and to investigate the erosion of nanocellulose coolant on automotive radiator. The scope of the research are the nanocellulose dispersed in base fluid which is from 60:40, (EG:W). …

Nurses’ Attitudes Towards Complementary And Alternative Medicine In Cancer Care – A Narrative Review, Saphir Davies, Patricia Eyres, Matt Carey, Kevin Hambridge

School of Nursing and Midwifery

Aims: This narrative review explored nurses’ attitudes towards complementary and alternative medicine (CAM) use in cancer care. Design: The study design was a qualitative narrative review with meta-aggregation. Data sources: Published studies were identified via searching the following databases: Medline, CINAHL, Pubmed and AMED.Review methods: Four papers that met the inclusion criteria were appraised using the Critical Appraisal Skills Program Tool. The qualitative data was extracted and meta-aggregated into three synthesised findings. Results: Four papers were included exploring nurses’ attitudes towards CAM in cancer contexts in four different countries. From these papers, 20 findings were extracted and formed into eight …

Adolescent Depressive Symptoms And Adult Functioning Within Major U.S. Racial Groups, Summer N. A. Millwood

Electronic Theses and Dissertations

Depression is the leading cause of disability among adults in the U.S and is associated with negative short- and long-term social, emotional, economic, and physical health outcomes. Notably, rates of depression among children and adolescents are rapidly increasing across the globe. Depression in youth disrupts crucial developmental processes that can adversely affect concurrent and longitudinal socioeconomic and health outcomes. Although extant research delineates the consequences of adolescent depression for adult functioning (e.g., lower educational attainment, fewer economic resources, worse physical health), studies that examine these associations within racially minoritized populations are scarce. This gap in the literature is especially striking …

Synergistic Reinforcement Of Lignin–Chitosan Hydrogels Using Vanillin As A Sustainable Green Crosslinker, Moses Ayitey-Adjin Jr., Mohammad Jahid Hasan, Jeremy Erb, Kishore Chand, Garry S. Crosson, Kenya Crosson, Esteban Ureña-Benavides, Erick Salvador Vasquez-Guardado

Chemical and Materials Engineering Faculty Publications

While bio-based hydrogels derived from lignin and chitosan are promising sustainable adsorbents, their practical application is hindered by poor mechanical stability. This study addresses this limitation by synthesizing lignin-chitosan hydrogels using vanillin as a green, bio-derived crosslinker via a facile solution-casting method. The formation of imine (Schiff base) linkages between the aldehyde groups of vanillin and the primary amines of chitosan was confirmed by FTIR spectroscopy (C = N stretching at ~ 1602 cm^− 1). SEM and TGA results demonstrated a reduction in the pore size of the crosslinked hydrogel and an enhanced residual thermal mass. Rheological and …

The Development And Validation Of Gains-Id, A Guidebook For Adapting Intervention Sessions For Students With Intellectual Disability, Kayla Mccreadie

Electronic Theses and Dissertations

Targeted interventions can equip students with intellectual disabilities (ID) with essential academic skills that support positive post-secondary outcomes. However, the lack of interventions specifically designed for this population creates barriers to equitable education. Until more interventions are developed, educators may benefit from resources that help adapt evidence-based practices to meet the needs of students with IDD.

The first manuscript introduces GAINS-ID (Guide for Adapting INtervention Sessions for Intellectual Disabilities). Based on best practices and Universal Design for Learning (UDL), the guide offers examples of adaptations to various intervention components—such as time, materials, environment, …

Biases Toward Threat In Categorization And Attention Allocation When Evaluating Static And Dynamic Emotional Crowds, Delaney Mcdonagh

Electronic Theses and Dissertations

Visual representations are often biased, and these biases can manifest across many different stages of perception. For example, when categorizing nuanced, ambiguous, or fleeting emotional expressions, most perceivers are biased to interpret expressions as negative. Biases also manifest at the level of attention-allocation as observers dynamically examine and attend to expressions as they visually navigate a crowd. To comprehensively understand biased emotion perception, it remains critical to understand how bias manifests across the process of making emotional judgements, both as observers gather information about faces over time and as they make a final categorization of what they see. Biased patterns …

The Question As Discipline: A Journey Toward Advanced Integrated Practice, Claire Boonmanop Webb

Graduate Student Portfolios, Professional Papers, and Capstone Projects

No abstract provided.