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Environmental Assessment of Lunar Habitats
No full textArup Bhattacharya, Louisiana State University, United StatesMina Lesan, Louisiana State University, United StatesSaeid Chahardoli, Louisiana State University, United StatesEhsan Kamel, New York Institute of Technology, United StatesAlain Boldini, New York Institute of Technology, United StatesEvan Connell, Optima Engineering, United StatesICES502: Space ArchitectureThe 54th International Conference on Environmental Systems was held in Prague, Czechia, on 13 July 2025 through 17 July 2025.Plans for human space flights for extensive lunar
exploration and sustained human presence are well underway
with the commencement of the Artemis program. A critical
aspect of this endeavor is evaluating support
infrastructures, particularly human habitats, utilizing
in-situ materials on the lunar surface to pioneer similar
approaches for future Mars missions. This work focuses on
the innovative use of Construction 3D Printing (C3DP) with
Lunar regolith to construct habitat structures, emphasizing
the interplay between building envelopes and environmental
quality in lunar habitats. By assessing
thermo-environmental conditions within habitats built using
In-Situ Resource Utilization (ISRU)-based construction
methods, this research seeks to dive deeper into
understanding the requirements for sustainable
environmental systems in the habitats. Using sulfur as a
binder with Lunar regolith as a waterless printable
concrete, this study aims to evaluate the thermal
attributes of the habitat and how it may affect crew
occupancy. During this project, simulations of habitat
envelopes built using indigenous materials were carried out
based on requirements set by the existing Environmental
Control and Life Support System (ECLSS) standards. Next,
using the lunar weather data, an analytical model is
developed to evaluate heat transfer behavior across
different envelope configurations in conceptual lunar
habitat designs to calculate the heating and cooling loads.
This research promises an enhanced understanding of optimum
environmental quality for equipment sizing and
heating-cooling system selection. Thus, it will provide
crucial insights into ECLSS design requirements for Lunar
surface habitats, supporting sustainable operations and
aligning with the strategic vision of extending continuous
human presence for long-term exploration
My Heart is a Bear: A Fever Dream
No full textFever Dreams details a young woman’s recollection of her first love’s genesis while examining the fresh effects of heartbreak, namely, imagined visions of her first boyfriend.
Following a particularly brutal rejection by her first love, Michael, visions of him begin to haunt the narrator’s mind as summer bleeds into the fall semester of her senior year of college. Seeking relief from these unusual and residual symptoms of first love’s failure, the narrator seeks assistance from the university counselor. Believing these “visions” to be simply metaphorical, the counselor instructs the narrator to keep a journal, written in third person perspective, chronicling the narrator’s first love in its entirety, from start to end. The intention was to gain perspective and a degree of separation but, as our narrator swiftly discovers, the visions only become more vivid and haunting, following her beyond fleeting moments of nostalgia and into day to day life, with her first love appearing at parties, weekend getaways, first dates, and even in times of danger. Still, the narrator believes that if she is able to finish her written recollection of this first love, that true perspective will be gained and the visions will cease, although that’s not guaranteed. The visions turn into tangible interactions that foster doubt and confusion in the narrator’s mind concerning the reality of how it all went down. During this time, the narrator enters into complex and alluring relationships with three different men, forcing her to confront elements of herself that have gone unchallenged, even in the recent writing of her past love. Friendship, romance, and reflection serve as a respite from her persisting visions until the real Michael appears at the semester’s end, right as the narrator had finished the journal, hoping the past would return to where it came from. What happens when the past asks for a place in our narrator’s future? Has the fever of first love finally broken, once and for all
Ironclad Analytics: Data Analysis Platform for Environmental Conditions in Sealed Military Machinery
No full textRafael Pinho, Fundação Getulio Vargas - Escola de Matemática Aplicada, BrazilSofia Monteiro, Fundação Getulio Vargas - Escola de Matemática Aplicada, BrazilLucas Westfal, Fundação Getulio Vargas - Escola de Matemática Aplicada, BrazilRafael Cruz Salles, Laboratório de Simulações e Cenários - Escola de Guerra Naval, BrazilICES504: Management of Air Quality in Sealed EnvironmentsThe 54th International Conference on Environmental Systems was held in Prague, Czechia, on 13 July 2025 through 17 July 2025.Military vehicles often operate in challenging environments
with limited ventilation, potentially exposing personnel to
harmful airborne contaminants such as particulate matter
(PM) and volatile organic compounds (VOCs). This study
investigates the risks posed by PM and VOCs to operators of
these vehicles, focusing on scenarios with low ventilation.
Exposure to PM can lead to various respiratory and
cardiovascular issues, while VOCs can cause eye and
respiratory irritation, headaches, and even more severe
health problems with prolonged exposure. This research
assesses the adequacy of currently available personal
protective equipment (PPE) in mitigating these risks across
a range of military operational tasks. This study utilizes
a purpose-built IoT device, incorporating sensor fusion and
machine learning, to analyze the effectiveness of different
PPE solutions, including respirators, filters, and
protective clothing, in reducing exposure to PM and VOCs
within military vehicles. The device, designed for onboard
deployment, facilitates real-time data acquisition and
analysis. Furthermore, the research explores alternative
mitigation strategies, such as advanced air filtration
systems and ventilation improvements, to minimize health
risks and optimize operational efficiency. Machine learning
algorithms are employed to analyze the collected data and
identify optimal strategies for mitigating exposure to PM
and VOCs in various operational scenarios. Within the
context of the Brazilian military and its diverse fleet of
vehicles, this research examines the specific challenges
posed by PM and VOCs in military vehicles with low
ventilation. This study aims to support the development and
implementation of comprehensive strategies to protect the
health of Brazilian military personnel and ensure
operational readiness across the full spectrum of military
operations. The findings will be valuable to military
decision-makers, vehicle designers, and health and safety
professionals responsible for safeguarding personnel in
challenging operational environments
Alaina Vasquez's MM Voice Recital 1
No full textRole of "Lady Billows" in Albert Herring by Benjamin BrittenRelated performance for this degree -- Alaina Vasquez's MM Voice Recital 2: https://hdl.handle.net/2346/103763Recital 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
Numerical Investigation of Heat Transfer and Fluid Flow within Electrochemical Hydrogen Peroxide Generation Unit
No full textKrishnan Swaminathan Gopalan, Analytical MEchanics Associates Inc. / NASA Ames Research Center, United StatesTra-My Justine Richardson, NASA Ames Research Center (ARC), United StatesKeith Peterson, NASA Ames Research Center (ARC), United StatesSantosh Vijapur, Faraday Technology Inc., United StatesElspeth Petersen, NASA Johnson Space Center (JSC), United StatesMatthew Frahlman, NASA Johnson Space Center (JSC), United StatesJeffrey Sweterlitsch, NASA Johnson Space Center (JSC), United StatesICES304: Physico-Chemical Life Support- Waste Management
Systems- Technology and Process DevelopmentThe 54th International Conference on Environmental Systems was held in Prague, Czechia, on 13 July 2025 through 17 July 2025.Long-term manned space missions require the onboard
production of disinfectants essential for maintaining crew
health and supporting life systems. Currently, disinfection
aboard the International Space Station (ISS) relies on
disposable wetted wipes, which are regularly resupplied
from Earth. This approach imposes a significant burden on
resupply logistics, storage, and waste management. To
address these challenges and support future missions,
efforts are underway to develop an in-situ solution that
electrochemically generates hydrogen peroxide disinfectant
using onboard resources. The Peroxide Generation Unit (PGU)
can produce up to 3 wt.% hydrogen peroxide on-demand at a
rate of 1 liter per day, providing a sustainable
alternative to Earth-dependent supplies. The resulting
aqueous hydrogen peroxide
(H2O2) is an effective disinfectant, safe for crew use,
compatible with spacecraft systems, and free from
volatiles, off-gassing, or residues. Generating hydrogen
peroxide at the required rate needs high voltages and
currents, exceeding 20V and 2A respectively, which leads to
significant heat generation from Joule heating. This
temperature rise poses a risk to sensitive system
components, especially critical and expensive membranes
that can degrade under thermal stress. In order to develop
and assess risk mitigation strategies, the thermal, fluid,
and electrical flows within the system are modeled
computationally using the commercial software COMSOL.
The numerical simulations are validated against
experimental data from an alpha-scale system designed at
Faraday Technology, Inc. Once verified, the model is
employed to identify thermal hotspots, investigate their
underlying causes, and explore solutions to prevent them
LUX-Thermal: A Heat Storage, Management and Distribution System on the Lunar Surface
No full textTobias Flecht, Lunar Outpost EU Sarl, LuxembourgSotirios Zormpas, Lunar Outpost EU Sarl, LuxembourgMuhammad Mashhood, Lunar Outpost EU Sarl, LuxembourgIndra Muthuvijayan, Lunar Outpost EU Sarl, LuxembourgJavier Stober, Lunar Outpost EU Sarl, LuxembourgJulian Cyrus, Lunar Outpost EU Sarl, LuxembourgICES104: Advances in Thermal Control TechnologyThe 54th International Conference on Environmental Systems was held in Prague, Czechia, on 13 July 2025 through 17 July 2025.The next decades will see a growing presence on the Lunar
surface. Not only will robotic systems continue to explore
the Moon, but also assist in establishing a permanent human
presence. Various stationary and mobile assets will be
needed to enable such a growth in Lunar exploration.
Different systems have emerged during the last years that
include instruments, vehicles, and habitats [1].
Due to the extreme thermal environment on the Lunar surface
[2], the long-term survival constitutes the most important
challenge during the designing of these systems as
depicted by NASA in their shortfall ranking list [3].
Studies have identified that the electrical power needs of
various systems during the night could range between 11 W
to 6 kW ranging from rovers to habitats [4]. An attempt to
meet these energy demands with a conventional combination
of battery and PV systems would result in a significant
mass penalty, with the additional disadvantage of not
producing sufficient heat to meet the system’s demand
during the Lunar night [5]. Dedicated technology is
required to allow human-made objects to survive multiple
diurnal cycles. Different approaches and technologies have
been proposed by multiple entities, which might include
radiator covers, variable conductance heat pipes and
thermal switches [6, 7].
Lunar Outpost EU is developing LUX-Thermal, an autonomous,
self-contained energy generation technology that provides
thermal and electrical energy on demand. Its operation is
based on the harnessing and storage of heat from multiple
inputs during the day. During the Lunar night, it would
provide power to customers in proximity, thus enabling
their survival without additional internal subsystems.
The testing of the first prototype showcasing the basic
functionalities concluded in September 2024. The proposed
paper might cover the ongoing development of the system,
the latest results of the testing campaign, as well as the
identified user needs
Solid-State Phase-Change Heterostructures for Radiative Heating and Cooling in Space
No full textSam Keller, University of Minnesota - Twin Cities, United StatesYujie Luo, University of Minnesota - Twin Cities, United StatesDaniel Kindem, University of Minnesota - Twin Cities, United StatesKarl Pederson, University of Minnesota - Twin Cities, United StatesOgnjen Ilic, University of Minnesota - Twin Cities, United StatesICES104: Advances in Thermal Control TechnologyThe 54th International Conference on Environmental Systems was held in Prague, Czechia, on 13 July 2025 through 17 July 2025.High-power satellites offer promising new imaging and
communications capabilities, yet there exist significant
thermal management challenges for satellites with a limited
radiating surface area. Conventional approaches for
mitigating overheating use deployable radiators to increase
total heat rejection and louvers to switch between heating
and cooling states. These components are often mechanical
and can exhibit high broadband emissivity, such as for
radiators comprising composite graphite coatings. As a
result, these radiators can absorb unwanted solar
irradiation, which reduces their cooling potential. We
present an approach for radiative thermal management using
few-layer optical heterostructures comprising solid-state
phase-change materials that exhibit a tunable refractive
index, enabling dynamic control of emissivity. The
thickness and material composition of these layered
structures may be optimized to switch between reflecting
solar radiation and emitting long-wavelength radiation in a
cooling state and absorbing solar radiation while
reflecting long-wavelength radiation in a heating state. We
describe the design and optimization procedure for these
structures and show that radiators that incorporate
phase-change materials could reach temperatures below a
blackbody emitter through selective reflection of solar
radiation. We initially evaluate thermochromic and
electrochromic materials and then analyze the use of
chalcogenide glasses as an active variable emissivity
thermal management solution. In addition to having a
highly reversible solid-state phase transition,
chalcogenide glasses remove the need for mechanical
actuation of louvers and thermal switches when alternating
between heating and cooling. Furthermore, they require no
net electrical power to maintain either state
Misc. Bib., Nicaragua to Perú
No full textThe Boyd Carter Papers represent a significant archival collection housed in the Hispanic Studies Collection in Texas Tech University's CMLL building. Dr. Boyd Carter was a distinguished scholar of Latin American literature who was active from the 1940s to his death in 1980. He held professorships at the University of Nebraska, Southern Illinois University, and the University of Missouri before concluding his career at Texas Tech University (1978-1980). Upon joining TTU, Carter donated his extensive archive to the university, including rare books, microfilm collections, bibliographical notes, and periodicals focusing on Latin American literature from 1850-1950, with particular emphasis on the famed Mexican writer Manuel Gutiérrez Nájera
Instilling PLC Culture: Meeting Foundational Literacy Needs of Minority Students Post COVID-19 Pandemic
No full textThis design based school improvement study was designed to gain understanding of the lived experiences of teachers in the primary grade levels and the impact of those experiences on their own teacher efficacy in the area of teaching foundational literacy skills. The purpose of this research was to provide insight into the needs of K-2 educators to ensure continued growth of teacher efficacy in the post COVID-19 educational environment through PLCs. A dive into current educational research related to the impact of PLCs provided an extensive depth of knowledge regarding current research in this area. Through the lens of transformational leadership, triangulation was made between literature, professional learning, and campus data points to further address the need for future professional development. This methodology allowed for a transformational intervention plan and perspectives to be put in place that educated leaders and researchers. This research study provided future researchers and leaders with information to understand the experiences of teachers in the years following the COVID-19 pandemic of 2020 and the impact of their experiences on the teaching of foundational literacy skills with African American and Hispanic students