Digital Commons Network^™

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.

Austronauts 3u Cubesat Space Weather Payloads Proposal, Tiana Pendray

Small Satellite Conference

CubeSats are becoming increasingly prominent due to their accessibility, affordability and versatility. An emerging field of satellite application is the monitoring of ionospheric space weather, made possible by sensitive instruments that collect data on plasma potential, temperature and ion density. These parameters vary due to changing solar activity in the form of Coronal Mass Ejections (CMEs) and solar flares, which can have severe impacts on satellite navigation systems, radio communication networks and orbital estimations. The AUStronauts team at the University of New South Wales is developing a 3U CubeSat with two space weather payloads – an Electrodynamic Tether (EDT) and …

Development And Validation Of An Operator-Friendly Flight Dynamics System For High-Precision Leo Nanosatellite Operations, K. W. Cheong, M. C. Kim, P. R. Kim, M. G. Kim, J. Y. Yu, G. H. Ju

Small Satellite Conference

A ground-based Flight Dynamics System (FDS) provides essential orbit information for satellite monitoring and mission planning. This study develops a Python-based integrated FDS that processes GPS observations, TLEs, and ephemerides through interconnected orbit determination, orbit propagation, and event prediction modules. The developed system combines Batch Least Squares orbit determination, HPOP/SGP4 propagation, covariance analysis, and nodal-crossing prediction within a consistent time and coordinate framework. 

The objective is to establish and validate an integrated workflow that generates reliable orbit states, future ephemerides, uncertainty information, and operational event products for CubeSat ground operations 

Functional Analysis Of Raspberry Pi Rp-Series Microcontrollers Using High-Dose Gamma Radiation For Low-Cost Cubesats, Tyler Nielsen, Aaron Bournias, Joe Dubois

Small Satellite Conference

Radiation testing of non-rad hard microcontrollers is crucial for low-cost CubeSats, allowing teams to avoid the prohibitive cost of radiation-hardened systems while still selecting microcontrollers that will survive in the irradiated environment of space.

Lessons Learned From The Hyvrid 3u Cubesat Development, Kim Jee Hoon

Small Satellite Conference

Space Object Surveillance System 

• Hanwha Systems’ Next Generation Satellite Laser Ranging (NGSLR) uses the turnaround time of laser emitted from the ground to measure precise distance of satellites or space objects.  
• It is also capable of precise orbit prediction and active response by utilizing high-energy laser. 

Verification Satellite

• CubeSat HYVRID is made to operate as a target satellite of the NGSLR system, verifying the laser ranging, precise orbit prediction, and active response technology.
  • GPS raw data
  • laser detection data
  • images captured before-and-after active response

Microcontroller Debugging Efficiency For Low Cost Cubesat Missions, Koowum Joshi, Tyler Nielson, Tyler Field, Aaron Bounias, Michael Goryll

Small Satellite Conference

This study evaluates the debugging efficiency of different microcontrollers for CubeSat applications by using a “debugging box” system that links two devices to detect faulty code. It compares latency, reliability, and cost to identify the most effective low-cost option. The goal is to improve accessibility to space technologies.

Multi-Phase Guidance And Control For Small Satellite Docking Via Deep Reinforcement Learning, Tanner Gill, Greg Furlich, Nisar Ahmed

Small Satellite Conference

As interest in small satellite Rendezvous, Proximity Operations, and Docking (RPOD) grows, so does the need for high-level autonomy in space systems. Current systems relying on constrained hardware and ground-in-the-loop decision-making are ill-equipped for the evolving, contested space domain. Recent research on autonomous spacecraft guidance and control has moved beyond established optimal control and trajectory optimization methods to incorporate Reinforcement Learning (RL), though these efforts have predominantly focused on a single operational phase. This research advances small satellite docking autonomy by formulating the reference scenario as a Hierarchical Markov Decision Process (H-MDP), expanding the scope of the learned guidance and …

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.

Aggiesat6 University Cubesat Ops Prep And Leops, Avery G. Barriga, Garrett M. Stevenson, John F. Connolly

Small Satellite Conference

AggieSat6 (AGS6) is a 6U CubeSat designed and developed by students at Texas A&M University (TAMU) as part of the University Nanosatellite Program (UNP) NS-10 cycle. The mission will demonstrate a space-based radio frequency array for Space Domain Awareness (SDA) applications and collect low-energy electron radiation data to improve existing environmental models. Beginning in January 2025, students at TAMU established mission operations architecture, implemented operator training and certification, and prepared to assume sole responsibility for on-orbit operations. The AggieSat6 bus launched into Low Earth Orbit (LEO) in April of 2026. The AGS6 Mission was supported by the University Nanosatellite Program. …

Experimental Analysis Of Cryptography Overhead For Secure Cubesat Telemetry, Tyler Field, Michael Goryll

Small Satellite Conference

Encryption consumes critical and limited resources, such as computing power, energy, and memory. Results from this research has helped SquidSat, a student-led 3u CubeSat launching sometime in 2027-2028, by providing data showing which microcontrollers are most effective for encryption algorithms.

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

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 …

Propellant-Free Formation Keeping Using Environmental Perturbations In Leo Via Orbital Angular Momentum Vector Matching, Yu Seike, Takaya Inamori, Keita Tanaka

Small Satellite Conference

Small-satellite formation flying enables new mission capabilities.

e.g. MIMO (Multi Input Multi Output) Communication

Challenge: Conventional formation keeping requires thrusters. Small satellites have limited onboard resources.

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.

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

Rapid Integration Of A Secondary Communications Subsystem On Aggiesat6, Alex B. Halbesleben, John F. Connolly

Small Satellite Conference

AggieSat Laboratory (AGSL) is a student-run space program that trains students in systems engineering through hands-on experience in the design, building, testing, and operation of space and space-related systems

AGSL is currently comprised of 107 students, most of whom are undergraduates. Its members work on eight active projects (including a shadow program for underclassmen).

AGSL has demonstrated flight heritage with the deployments of AggieSat2, AggieSat4, and AggieSat6.

Squidsat: A Modular, Open-Source 3u Cubesat Bus For Low-Cost Cubesat Missions, Aaron Bournias, Joseph Dukowitz, Mark Jaber, Tyler Field, Micah Nguyen, Koowum Joshi, Noah Campos, Daphne Riordan, Ryan La Ra, Jonathan Luse, Joshua Sink, Tyler Nielsen, Ricardo Ontivaros, Michael Goryll, Joe Dubois

Small Satellite Conference

CubeSat launches continue to increase yearly, yet over 51% of missions from 2002–2016 failed. Primary faults were often due to power, mechanical, or design issues. Costs still remain high in a market driven by expensive flight-heritage hardware with proprietary designs. In order to counteract such costly practice, Sun Devil Satellite Lab (SDSL) at ASU has developed an open-source, modular 3U CubeSat bus built for low cost reliability. Unlike other bus architectures, SquidSat distributes control across independent microcontrollers linked via a CAN bus. CAN is commanded by the OBC but is capable of independent operation for fault isolation and easier testing. …

Bcon-2 Operations And Pre-Flight Testing, Kenny Blanton, Brayden Kuchenbacker, Dan White

Small Satellite Conference

As part of the Dream Big Phase I mission, Valpo Space Program’s (VSP) satellite BCON-2 is a 0.5U ThinSat CubeSat designed by NearSpace Launch (NSL).

Dimensions: 0.5U ThinSat (10 cm × 10 cm × 5 cm).

• Comms/MCU Board: STM-32 based PocketQube satellite board that utilizes an AX5043 transceiver to manage VHF/UHF radio communications and subsystem connectivity via CAN bus.
• ADCS Payload: Collaborative flight of the University of Luxembourg’s (UniLu) Space Systems Engineering (SpaSys) system; features their PCB-embedded tri-axial magnetorquer coils Attitude Determination and Control System (ADCS).
• Square Koch Fractal Antenna: The RF systems remain inactive for this mission due to …

Mobile Health (Mhealth) Interventions To Promote Exclusive Breastfeeding In Low-Income Communities: A Scoping Review, Winarsih Winarsih, Dayat Subekti, Herdini Widyaningpertiwi, Tri Sunarsih, Endah Puji Astuti, Elvika Fit Ari Shanti

Journal of Health Research

Background: Exclusive breastfeeding (EBF) is a critical determinant of infant health and survival, yet its prevalence remains suboptimal in low-income communities globally. Barriers such as limited access to lactation support and misinformation continue to challenge EBF promotion efforts in these settings. This review maps and evaluates mHealth interventions that promote exclusive breastfeeding in low-income populations.

Methods: This scoping review was conducted following the JBI methodology and reported in accordance with the PRISMA-ScR guidelines. A systematic search of PubMed, Scopus, and Web of Science was conducted for articles published up to July 2025. Eligible studies involved any mHealth-based breastfeeding intervention …

Data Sets For White Sands National Park Dust Study, Mark R. Sweeney, David Bustos, Patrick Martinez, Gwenn Harsha, Steve Forman, Sarah Chadima, Jenny Hand, Tom Gill

Data and Datasets

These datasets include meteorological data obtained from stations at White Sands National Park from 2023-2024, elemental composition data of dust collected at an Interagency Monitoring of Protected Visual Environments (IMPROVE) site (WHIT1), and PI-SWERL dust flux and associated data collected at the park from 2018-2023. These data sets are in support of a paper submitted for publication regarding the factors resulting in frequent dust emissions from White Sands National Park.

Teaching Ai Through Communication: Rethinking Evidence, Interaction, And Learning, Chad Edwards, Matthew J. A. Craig, Varun Rijhwani, Habeeb Abdulrauf

Journal of Communication Pedagogy

This conceptual essay advances a central claim: Communication pedagogy is increasingly engaged in teaching AI through communicative interaction. Moving beyond the familiar distinctions between teaching with AI and teaching about AI, it argues that classrooms function as sites where AI communication is shaped through prompting, critique, revision, and ethical evaluation. Drawing on human–machine communication scholarship, the essay reconceptualizes evidence of learning as visible in students’ reasoning, justification, and contextual adaptation rather than in polished outputs. By foregrounding relational engagement, transparency, and communicative judgment, it positions teaching AI as a defining pedagogical task in AI-mediated educational environments.

The Co-Educators Framework: An Illustrative Account Of Shared Pedagogical Practice And Inclusive Teaching In A Large-Enrollment Communication Course, Divya S, Man Luo, Jisha Jacob, Shahla Shahnaz Dyuti, Victoria Michelle Main

Journal of Communication Pedagogy

Large-enrollment courses present structural challenges to inclusive and relational pedagogy, particularly when instructional labor is shared across teaching teams that include graduate teaching assistants (GTAs). This study examines inclusive teaching as a communicative and practical process enacted through co-education, the coordinated instructional work of faculty and GTAs. Using a diary-based reflexive design, four doctoral GTAs contributed teaching journals across one semester of an undergraduate Communication Theory course. Reflexive thematic analysis identified four themes: collaborative course design, communication as pedagogical infrastructure, equitable assessment, and reflexive care. The study offers the Co-Educators Framework as an illustrative account of how shared, communicative pedagogical …

Exploring Power In The Classroom Through The Lens Of Relational Power, Aubree A. Herman, Narissra Maria Punyanunt-Carter Phd

Journal of Communication Pedagogy

This study explores how French and Raven’s relational power model shapes student communication in higher education. Through a survey of 530 undergraduates, the research investigates how TA age and gender, and student gender, impact student perceptions of power. Results indicate that TA gender and age impact student perceptions of referent power, but not expert power; however, expert and referent power emerged as the strongest predictors of course satisfaction and intention to take future courses, while coercive power negatively predicted both outcomes. These findings underscore the importance of expertise and interpersonal interaction in the TA–student relationship and suggest that French and …

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). …

Effects Of Air Injection Styles And Burner Geometry On Blowoff In Premixed Swirl Flame, Haidar Ali Janna, Zaid Aldulaimi, Mohammed Alfahham

The Nexus of Sustainability and Energy Technology Journal

Understanding the effect of air injection strategies and burner configuration on flame stability is essential for preventing blowoff in premixed swirl combustion systems. This experimental study investigates the blowoff limits of liquefied petroleum gas (LPG) flames in tangential swirl burners with two different geometries,namely two-inlet and three-inlet designs, while maintaining the same geometric swirl number and swirl strength. Two air injection strategies were examined:axial air injection which introduced through the burner base plate,and an air curtain system supplied through the inner circumference of the burners nozzle. Blowoff limits were recorded over a wide range of operating conditions to quantify the …

Implementation Of 4-Ir In Scm Of Woven Apparel Industry – A Case Study In Bangladesh For Prosperity And Sustainability, Kaniz Farhana, Nazibah Nowreen Onadee, Farhana Mabia Mim, Fuzail Ahmed Khan Rajit, Md. Fahad Faruk Pavel, S.M. Farhana Iqbal, Abu Shadate Faisal Mahamude

The Nexus of Sustainability and Energy Technology Journal

The significance of the Fourth Industrial Revolution (4-IR) for supply chain management (SCM) in the woven clothing industry is emphasized by this survey study. The implementation of cutting-edge technologies that can improve these aspects, like IoT, RFID, blockchain, big data analysis, cybersecurity, and automation, is examined from the viewpoints of woven clothing manufacturers. This investigation seeks to determine Bangladesh's key technological barriers as well as the primary motivator for the weaving RMG's adoption of cutting-edge technologies. Here, a combination of methods, including fieldwork and data collection, has been performed for thorough analysis. The research outlines the current state of affairs …

Evaluation Of Graphene Cathode And Aluminum Ion Ev Battery Performance: A State-Of-The-Art Analysis For Future, Abu Shadate Faisal Mahamude, Kaniz Farhana

The Nexus of Sustainability and Energy Technology Journal

Lithium-ion batteries may eventually be replaced with rechargeable aluminum-ion batteries (AIBs) due to their high energy density, increased safety, and plentiful supply of raw materials. The development of appropriate cathode materials for AIBs is a major priority these days. As a result of their better quality, graphene-based cathodes have a great chance of success. Graphene is a relatively new and promising material with a unique set of chemical and physical characteristics. Graphene's high electron conductivity and large specific surface area make it seem like one of the best electron-conducting additions, but there are several other ways to increase the cathode …

Atomistic Insights Into The Interfacial Properties And Thermal Transport Of Mxene–Copper Nanocomposites: A Molecular Dynamics Study, Navid Aslfattahi, Maryam Sadat Kiai, K. Kadirgama, L. Samylingam, Chee Kuang Kok, Mohd A.F. Rosli, Thong Leng Lim

The Nexus of Sustainability and Energy Technology Journal

Understanding the interfacial heat transport mechanisms in Ti₃C₂T_x–copper nanocomposites is essential for developing advanced Thermal Interface Materials (TIM) for electronic and energy systems. This study provides atomistic insights into how MXene surface terminations (–O, –OH, –F), copper crystallographic orientations ((111), (100), (110)), and MXene layer thickness influence thermal conductivity and interfacial thermal resistance. O-terminated MXene exhibited the strongest interfacial adhesion (∼0.45 J/m²) and the highest thermal conductivity (∼68 W/m· K), while F-terminated MXene showed the weakest interfacial bonding and poorest heat transfer (∼45 W/m· K). Increasing the MXene thickness introduced additional phonon …

Norman H. Cromwell, Unl Chemistry; Nu System Dean; Eppley Cancer Center Director, Norman H. Cromwell, Pete Boughn, Mark A. Griep

UNL ORCA Interview Series

This 1980 interview of Normal Cromwell was done by Pete Boughn at the University of Nebraska Medical Center in Omaha. He asked about Cromwell’s history but mostly about his time as director of the Eppley Cancer Center. The interview is reproduced with permission from the UNMC McGoogan Library.

Cromwell was born in 1913 in Terre Haute, Indiana. In 1935, he earned a bachelor’s degree in chemical engineering from the Rose-Hulman Institute of Technology in his hometown. In 1939, three things happened: he earned a doctorate in organic chemistry from the University of Minnesota, he got married, and he was hired …

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 …