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Development and Performance Test Results of the Starlab Alternative Urine Processor Ground Test Unit
No full textPatrick Pasadilla, Paragon Space Development Corporation, United StatesConnor J. Joyce, Paragon Space Development Corporation, United StatesTravis Palmer, Paragon Space Development Corporation, United StatesBen Brandon, Paragon Space Development Corporation, United StatesJavier Lopez, Paragon Space Development Corporation, United StatesBen Huff, Paragon Space Development Corporation, United StatesLindsay Hess, Starlab Space LLC, United StatesBarry W. Finger, Starlab Space LLC, United StatesJames "Jeff" Richeson, NASA Marshall Space Flight Center (MSFC), United StatesNatalie Aponte-Mendez, NASA Marshall Space Flight Center (MSFC), United StatesICES305: Environmental Control of Commercial and
Exploration SpacecraftThe 54th International Conference on Environmental Systems was held in Prague, Czechia, on 13 July 2025 through 17 July 2025.Starlab LLC (Starlab) and Paragon Space Development
Corporation (Paragon) are developing the Alternative Urine
Processor (AUP), a technology derived from Paragon’s Brine
Processor Assembly (BPA). In partnership with NASA’s
Commercial Low Earth Orbit (LEO) Destinations Program
(CLDP), Starlab will launch its space station later this
decade. The AUP is a leading technology to recover water
from urine aboard Starlab and other future exploration
spacecraft. It utilizes the same membrane distillation
bladder technology as BPA but changes key operational
parameters and the bladder fill methodology to achieve a
higher processing rate that eliminates the need for a
separate urine processor upstream of the BPA. A full-scale
AUP test unit was designed, built, and tested at Marshall
Space Flight Center (MSFC) to evaluate its ability to
process urine from 4 crew at a generation rate of 1.8 L of
pretreated urine + flush water per crewmember per day. The
AUP is a self-contained urine processor which accepts urine
that has been pretreated to inhibit microbial activity,
prevent the volatilization of contaminants, and evaporates
and purifies water into the cabin air or to a Humidity
Control System (HCS). The AUP is a 2-bladder system that
operates with a semi-continuous fill and dewatering process
instead of a batch process like BPA. The AUP was designed,
tested and shown to recover greater than 95% of available
water from 95th percentile urine pretreated (PTAU95) with
the US Alternative (Alt) Pretreatment. This single unit
achieves the same water recovery rate as the
state-of-the-art ISS Urine Processor Assembly (UPA) + BPA,
at a fraction of their combined mass and volume. In
addition, testing demonstrated that odor and vented
constituents complied with a cycle-average mean Odor
Activity Value (OAV) of less than 10, computed using the
Single-Compound Odor Thresholds (SCOTs) and 180-day
Spacecraft Maximum Allowable Concentrations (SMACs)
respectively
Preliminary Thermal Challenges of the Capture, Containment and Return System (CCRS) Primary Containment Vessel
No full textJennifer R. Miller, NASA Jet Propulsion Laboratory (JPL), United StatesTakuro Daimaru, NASA Jet Propulsion Laboratory (JPL), United StatesNikhil Damle, NASA Jet Propulsion Laboratory (JPL), United StatesICES101: Spacecraft and Instrument Thermal SystemsThe 54th International Conference on Environmental Systems was held in Prague, Czechia, on 13 July 2025 through 17 July 2025.Planning for Mars Sample Return continues to evolve as
science and engineering institutions propose solutions to
return samples cached by NASA’s Mars 2020 Perseverance
Rover. Early designs include methods to seal samples inside
primary and secondary containment vessels to address
backwards planetary protection requirements as part of
ESA’s Earth Return Orbiter’s (ERO) Capture, Containment and
Return System (CCRS). As an ERO payload, CCRS would capture
the Orbiting Sample (OS) containing the cached Mars’
samples from Mars orbit, contain the OS inside a sterilized
primary containment vessel, insert the primary vessel into
a secondary containment vessel, and return it to Earth.
While the CCRS project has currently been paused, the
thermal design required testing of optical coatings,
heaters, and interface conductances at high temperatures in
excess of 500⁰C to both assemble the primary containment
vessel and sterilize critical interfaces. Parameter
sensitivities using the thermal model provided inputs into
such tests as well as significant exposure on the project
risk list until bought down. Achievement of such high
temperatures across multiple moving interfaces and even
various projects within the planned Mars Sample Return
campaign, required challenging thermal solutions
Resisting, Remembering, Reclaiming: Healing Poetics in Mexican American and Indigenous U.S. Literature
No full textThis dissertation examines how contemporary Mexican American and Indigenous U.S. poets engage with language, the environment, and Indigenous epistemologies to confront the enduring legacies of colonialism and envision pathways to healing. Framing these poetic works within the concept of the counter-archive, the study underscores how poetry challenges dominant historical narratives while preserving marginalized voices and experiences. Through a comparative analysis of poetry addressing migration, border violence, and ecological degradation, this project traces a tonal shift from defiance to reconciliation, illustrating how poetic expression fosters resistance, remembrance, and reclamation.
Drawing on an interdisciplinary framework that integrates Latino/a and Indigenous studies, environmental humanities, and decolonial theory, this study identifies key poetic strategies—linguistic hybridity, natural motifs, and Indigenous knowledge systems—that disrupt colonial structures. Chapter 1 explores language as resistance, focusing on how bilingualism, code-switching, and oral traditions assert cultural survivance and fluid identities. In this context, Gloria Anzaldúa, Sheryl Luna, and Pat Mora use language as a powerful tool, creating spaces that celebrate fluidity and hybridity. Chapter 2 shifts to environmental themes, emphasizing the river as a central motif symbolizing ecological resilience, relationality, and resistance to extractivist practices. Through the works of Emmy Pérez, Ada Limón, and Natalie Diaz, the river emerges as a symbol of interconnectedness and cultural endurance. Chapter 3 focuses on Indigeneity, examining how Layli Long Soldier, Joy Harjo, and Lorna Dee Cervantes reclaim Indigenous epistemologies, using poetry to imagine envision through reciprocal relationships with land, community, and ancestors.
By centering Mexican American and Indigenous U.S. voices, this dissertation contributes to ongoing discussions in decolonial poetics, environmental justice, and the intersections of literature and activism. It positions poetry as a counter-archive, where language, land, and Indigenous knowledge converge to confront historical trauma and imagine relational futures grounded in care, reciprocity, and survivance
Flexible Heat Pipe for Space, Development and Test Validation
No full textMikael Mohaupt, Euro Heat Pipes, BelgiumBernard Mullender, Euro Heat Pipes, BelgiumQuentin Harivel, Euro Heat Pipes, BelgiumICES201: Two-Phase Thermal Control TechnologyThe 54th International Conference on Environmental Systems was held in Prague, Czechia, on 13 July 2025 through 17 July 2025.The proposed paper details the description of the
development of the flexible link
compatible with aluminum axially grooved heat pipes
technology. The straight parts are classical extruded
aluminum grooved profiles used for the most widely used
heat pipes technologies in space applications, with high
reliability and large space flight heritage. The flexible
heat pipe is composed of a flexible junction to connect the
straight extruded aluminum grooved standard profiles. The
flexible joint contains a capillary structure, a flexible
housing and welded connectors. The development process is
detailed. Two Engineering Models with different
technologies for the flexible capillary structures are
manufactured and tested to validate their robustness and
characterize their performances. These Engineering Models
have been tested in the specific rotating test bench
capable to simulate the micro-gravity fluid distribution to
determine the optimal filling quantity in straight
configuration. Then an extended performance
characterization step is performed in several bent
configurations from straight to stowed, with tilt up to 5mm
with evaporator above the condenser aiming to validate the
capillary performances of the flexible joint. All the
results are compared with the same AGHP profile extruded
heat pipes and demonstrate an impact on overall
performances of the developed flexible technology lower
than 10% for the heat transport capacity and no impact on
the heat transfer coefficients. The maturity is TRL5/6 at
the end of this activity
Mechanical Pump-Assisted Active Two-Phase Thermal Control System (MPA2PTCS) Transient Modeling
No full textWei-Lin Cho, Collins Aerospace (An RTX Business), United StatesICES201: Two-Phase Thermal Control TechnologyThe 54th International Conference on Environmental Systems was held in Prague, Czechia, on 13 July 2025 through 17 July 2025.High-throughput satellite (HTS) provides much more data
handling capability than the conventional fixed satellite
service (FSS) which significantly reduces the operational
cost for the service providers. In the meantime, the power
consumption of the HTS payload electronics, and thus the
required heat rejection capability (as high as 25 kW) has
increased tremendously. For high heat load, high heat flux,
and long transport distance applications, the passive
two-phase and single-phase pump loop have reached their
limits. Recent developments have shown that the MPA2PTCS
has great potential in offering thermal management to the
HTS market. Additionally, MPA2PTCS has better architecture
flexibility and better tolerance to late-stage design
change. Compared to the single-phase thermal control
system, the MPA2PTCS offers better temperature uniformity,
lower pumping power, and potentially lighter system mass.
With these benefits, the prospect of deploying two-phase
thermal control technology in high power spacecraft is very
promising.
The operation of MPA2PTCS is more complex than that of the
single-phase flow loop. To conserve operating power for
the satellite, the MPA2PTCS is in non-operational state
until it reaches the service orbit. During this orbit
transfer period, the MPA2PTCS temperature will drops to
its lowest non-operating temperature. Once in orbit, the
MPA2PTCS will commence its start-up procedures. Unlike the
single-phase flow loop, the procedures and the responses
of the MPA2PTCS during start-up is much more complex.
Therefore, it is prudent to predict the MPA2PTCS behavior
prior to its deployment to ensure its robust operation.
This paper describes the transient start-up modeling and
the behavior of the MPA2PTCS from its dormancy to the
final steady state. The variables used in the modeling
reflect the actual designed operating parameters. The
modeling results will be compared to the MPA2PTCS
acceptance test data in the near future
New Method to Measure Cotton Fiber-to-Fiber Friction
No full textCotton fiber friction plays a crucial role in regulating fiber flow during spinning and can influence yarn quality. In this study, a new method for measuring cotton fiber-to-fiber friction has been proposed, which adheres to the principle of an ASTM method but includes modifications in sample preparation and testing procedures to meet industry demands. A comparison with the ASTM method shows the new method effectively differentiates cotton samples. Moreover, the proposed sample preparation allows testing with smaller sample quantities. A 10-day stability test confirmed the stability of the new method. Testing 312 cotton samples revealed practically no correlation between fiber-to-fiber friction and other fiber quality parameters, suggesting fiber-to-fiber friction is a distinct property of cotton fibers. Preparing card or draw slivers for such a large sample size would be impractical due to the substantial time, effort, and cost involved, further highlighting the effectiveness and practicality of the new method.
Cotton wax acts as a lubricant and may impact fiber-to-fiber friction. To evaluate this impact, white, green, and brown cotton fibers were subjected to heat and xylene treatments. The new method is used to measure fiber-to-fiber friction for control and treated samples. Heat treatment showed no consistent trend in friction values for all three cotton types. However, xylene treatment generally increased friction values across all cotton types. Fourier Transform Infrared Spectroscopy (FTIR) and Thermogravimetric Analysis (TGA) were used to evaluate changes in the surface chemistry due to xylene treatment. The FTIR analysis showed a reduction in noncellulosic materials, principally wax, in xylene-treated samples. Furthermore, the Principal Component Analysis (PCA) of FTIR data revealed a clear distinction between control and xylene-treated samples, supporting the reduction of noncellulosic materials. TGA analysis demonstrated variations in weight loss percentages across cotton samples. Overall, wax reduction resulted in higher friction values of xylene-treated samples, and the new method effectively measured this, which further highlights the effectiveness of the new method
Dustin Pedigo's MM Bass Recital 1
No full textInterplay, Bill Evans
Yardbird Suite, Charlie Parker
It Could Happen To You, Jimmy Van Heusen and Johnny Burke
Solstice, Jonny Verbeten
Is It, Dustin Pedigo
Inner Urge, Joe Henderson
Nigerian Marketplace, Oscar Peterson
In The Wee Small Hours Of The Morning, David Mann and Bob HillardRelated performance for this degree -- Dustin Pedigo's MM Bass Recital 2: https://hdl.handle.net/2346/103753Recital recordings are archival copies for educational purposes only. Members of the TTU community may request to listen/view them for educational purposes via the PDF link to the left
FY2025 Development Status of DRCS: ISS Demonstration of JAXA’s CO2 Removal System
No full textMitsuhide Sasaoka, Japan Aerospace Exploration Agency (JAXA), JapanYohei Shido, Japan Aerospace Exploration Agency (JAXA), JapanKoji Otsuka, Japan Aerospace Exploration Agency (JAXA), JapanDylan Shun Izuma, Japan Aerospace Exploration Agency (JAXA), JapanChiaki Yamazaki, Japan Aerospace Exploration Agency (JAXA), JapanSatoshi Matsumoto, Japan Aerospace Exploration Agency (JAXA), JapanMayuko Shinohara, Chiyoda Corporation, JapanHidetoshi Nakagami, Chiyoda Corporation, JapanMutsumu Nagase, Chiyoda Corporation, JapanTomohiro Kinoshita, Research Institute of Innovative Technology for the Earth, JapanNaomi Yoshino, Research Institute of Innovative Technology for the Earth, JapanKatsunori Yogo, Research Institute of Innovative Technology for the Earth, JapanICES302: Physico-Chemical Life Support- Air Revitalization
Systems -Technology and Process DevelopmentThe 54th International Conference on Environmental Systems was held in Prague, Czechia, on 13 July 2025 through 17 July 2025.The Japan Aerospace Exploration Agency (JAXA) is developing
a carbon dioxide (CO2) removal system to strengthen core
life-support technologies for future crewed space missions.
An on-orbit technology demonstration of the CO₂ removal
system (DRCS) on the International Space Station (ISS) is
being developed before a practical system for the Gateway
International Habitable Module (I-HAB) is developed. The
demonstrator for the ISS is scheduled to be launched in
autumn 2025. This paper describes the status of the
development of the DRCS and the results of performance
tests of it with variable CO2 concentration changes over
time as if it were on the IS
The Silent Struggle: Exploring Depression, Anxiety, and Emotion Dysregulation in Sexual Identity Concealment and Disclosure During Emerging Adulthood
No full textSexually diverse emerging adults have a heightened risk of experiencing greater anxiety and depression compared to their heterosexual counterparts, which can be attributed to heterosexist ideals. Existing as a sexually diverse individual in a heteronormative context can impact the emotion regulation strategies an individual utilizes as well as their overall mental health. How the concealment and disclosure of a sexually diverse identity interacts with emotion regulation to predict mental health outcomes, such as anxiety and depression, have not been examined within emerging adulthood. The current study aimed to (1) examine emotion dysregulation, concealment of sexual identity, and disclosure of a sexual identity as predictors of depression and anxiety, and (2) assess to what extent concealment of a sexual identity and disclosure of a sexual identity moderates the association between dysregulation and depression and anxiety. Data for the current study were obtained from a larger longitudinal study that recruited two cohorts of emerging adults who were enrolled in college. The current study utilized 76 participants (Mage = 20.84; 75% cisgender women) from both cohorts, but only at specific time points of the parent study.
It was found that only concealment significantly predicted emerging adult anxiety and depression. When predicting depression, the association between concealment and emotion dysregulation was found to be trending towards significance; however, when predicting anxiety, the interaction was significant. There could be many reasons why outcomes of the disclosure models were nonsignificant, such as resiliency to discrimination, supportive social relationships, or identification with additional minoritized groups. Findings reveal how concealing a diverse sexual identity can be detrimental to mental health and the importance of creating supportive environments, especially for emerging adults attending college