62970 research outputs found
Sort by
Air Revitalization, Ventilation, and Atmospheric Monitoring Subsystems of the Environmental Control and Life Support System (ECLSS) for the Habitation and Logistics Outpost (HALO)
Get PDFJuan Plata, Paragon Space Development Corporation, United StatesRon Wright, Paragon Space Development Corporation, United StatesLawrence Mittelstadt, Paragon Space Development Corporation, United StatesCraig Wadlington, Paragon Space Development Corporation, United StatesCatherine Keen, Paragon Space Development Corporation, United StatesZach Turner, Northrop Grumman Corporation, 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.Paragon Space Development Corp. is developing the Air
Revitalization Subsystem (ARS), Ventilation Subsystem (VS),
and Atmospheric Monitoring Subsystem (AMS) of the
Environmental Control and Life Support System (ECLSS) for
Northrop Grumman’s (NG) Habitation and Logistics Outpost
(HALO) Module as part of NASA’s Gateway station. The
Artemis Program mission profile for Gateway drives an
unprecedented combination of requirements for an ECLSS
hardware development program that creates unique challenges
for the design team. Specifically, the combination of
requirements pertaining to radiation tolerance and mission
duration, contingency depressurization capability, high
launch loads, and crewed mission cadence present major
constraints upon design of electronics, material selection,
reliability, and life validation approach. This paper
provides an overview of Paragon’s approach to these
challenges, development status, and lessons learned from
the program as of its CDR phas
Laboratory Validation of the Water Purification Subsystem for Lunar In-Situ Resource Utilization in the LUWEX Project
Get PDFGiorgio Boscheri, Thales Alenia Space, ItalyGiovanni Marchitelli, Thales Alenia Space, ItalyThomas Fili, Thales Alenia Space, ItalyRachele Perelli, Thales Alenia Space, ItalyPaul Zabel, German Aerospace Center (DLR), GermanyMateo Rejón López, German Aerospace Center (DLR), GermanyICES303: Physico-Chemical Life Support- Water Recovery &
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.The LUWEX project (Validation of Lunar Water Extraction and
Purification Technologies for In-Situ Propellant and
Consumables Production) aims to enable sustainable lunar
exploration by developing and validating systems for water
extraction and purification directly from lunar regolith.
This study presents findings from the laboratory campaign
dedicated to the testing of the Water Purification
subsystem, conducted under laboratory conditions to
evaluate system efficacy and reliability. Within the LUWEX
framework, the Water Purification subsystem is critical for
converting extracted raw water into potable water for
crewed missions as well as for deionized water for
electrolysis. The purification unit was tested for
performance parameters including filtration efficiency,
contaminant removal, and adaptability to variable raw water
input contamination rates, simulating the dynamic
extraction conditions expected on the lunar surface.
Preliminary results indicate that the purification
subsystem meets key benchmarks in removing impurities,
achieving product water standards, and effectively
integrating with the broader LUWEX system architecture. Key
findings demonstrate not only the subsystem's capability to
support water quality requirements for human consumption
but also its potential scalability for long-term lunar
operations. The outcomes of this test campaign highlight
advancements in In-Situ Resource Utilization (ISRU) and the
readiness of water purification technologies for future
lunar bases
Understanding the Rare Earth Element Budget of Low to Medium Grade Hydrothermal Chlorite
No full textThis study provides new insights into the distribution of rare earth elements (REE) in a range of chloritic minerals from hydrothermally altered mafic rocks. Low-to-medium grade ocean-floor metamorphic conditions give rise to unique geochemical signatures of analyzed chlorite through the interaction between hydrothermal fluids and surrounding lithologies. This research employs optical microscopy, X-ray diffraction, electron microscopy, and in situ laser ablation inductively coupled plasma mass spectrometry to support the codependency of major and trace element geochemistry on the prevailing hydrothermal conditions. Fe-chlorite is the dominant alteration phase and collectively presents a gradient that is defined by an octahedral Fe-Mg substitution depending on fluid chemistry. Additionally, numerous textural varieties such as amygdales, pseudomorphic, vein, and matrix chlorite have been identified and their phase chemistry largely suggests a common genetic link. The Tschermak substitution vector is used to estimate relative temperatures of formation and the capability to adsorb REE in outer-sphere complexes. Rare earth element chemistry of chlorite reflects the formation conditions such as redox state, ligand complexation, and the potential control on the REE budget of chlorite. Chlorite from non-ophiolite rocks exhibit LREE enrichments determined by the Cl- content of the hydrothermal solution and a negative Ce anomaly as a testament towards oxidizing conditions. Conversely, the REE abundances in chlorite from ophiolite rocks indicate a strong influence by primary mineral dissolution, which depends on the extent of clinopyroxene or plagioclase alteration. Mixed-layer phases tend to harbor greater REEtotal than discrete chlorite and represent a separate hydrothermal fluid regime. In total, this research advocates the use of chloritic minerals as a promising avenue towards understanding REE mobility in seafloor hydrothermal settings
Synthesis and Characterization of Multilayer 3D Chiral Polymers with Enhanced Optical Properties
Get PDFThis study reports the synthesis of novel multilayer 3D chiral polymers using 2,2′-(2,7-Naphthalenediyl)bis[4,4,5,5-tetramethyl-1,3,2-dioxaborolane] and 1,8-dibronaphthalene along with its derivatives as key precursors. Comprehensive characterization was performed using nuclear magnetic resonance (NMR), gel permeation chromatography (GPC), photoluminescence, ultraviolet (UV) spectroscopy, scanning electron microscopy (SEM), polarimetry, dynamic light scattering (DLS), and thermogravimetric analysis (TGA). Notably, the polymers exhibited remarkable aggregation-induced emission (AIE) and aggregation-induced polarization (AIP) phenomena, revealing enhanced luminescence and optical activity in aggregated states. These findings underscore the potential of these chiral polymers for applications in optoelectronics and advanced sensing technologies, highlighting the intricate relationship between molecular structure and optical behavior
Integration of Solid Oxide Co-Electrolysis of Steam and CO2 in Future Closed-Loop Life Support Systems
Get PDFAlicia K. MacDonald, Lockheed Martin, United StatesJesus F. Olivares, Lockheed Martin, United StatesYifan Li, Lockheed Martin, United StatesMichele Hollist, OxEon Energy, LLC, United StatesICES302: 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.Closed-loop environmental control and life support systems
(ECLSS) are a mission priority for long-duration human
space exploration campaigns, with >75% recovery of oxygen
from carbon dioxide and reduction in system mass/kg oxygen
identified as target improvement metrics. Existing
approaches such as Sabatier, Bosch, and microfluidic CO2
electrocatalysis provide a spectrum of benefits and
drawbacks. Within this landscape, we describe the specific
benefits afforded by ECLSS that include solid oxide
co-electrolysis (SOCE) of steam and CO2 as the primary
oxygen generation and recovery mechanism. Using OxEon’s
flight-proven MOXIE technology for converting H2O + CO2 to
H2 + CO and O2 as a baseline, we provide a comparative
analysis against the Sabatier-based legacy as well as
leading alternative approaches. We provide key system
considerations for SOCE integration to ECLSS, including
thermophysical operating parameters and materials
compatibility based on current state-of-the-art knowledge
on both contaminant space and SOCE materials science. We
project a baseline ECLSS performance and present in-house
test data on a 10-cell solid oxide stack to validate
subscale performance. Finally, we discuss an overview of
downstream chemistry available with the products of SOCE
for increasing oxygen recovery to >75% (including the
Fischer-Tropsch and Boudouard reactions), and outline the
needed future research to mature such technologies to
fruition. Based on our preliminary analysis, we argue that
SOCE-driven oxygen recovery will be a significant boon to
long-duration human space exploration
A Design Development Study of Integrating an Instructional Coaching Literacy Program to Promote Reading Achievement Among Low-Socioeconomic and English Language Learners in an Urban High School
Get PDFThis design study investigated the impact of an instructional coaching program focused on culturally responsive teaching instruction and supporting the reading development needs of English language learners and low-socioeconomic secondary students. The study examined the impact on student reading development by implementing a targeted instructional coaching program to support teacher capacity in culturally responsive teaching strategies. Critical findings of this research include: (1) teachers play an influential role in student academic success through quality instruction; (2) increasing teacher capacity in culturally responsive teaching increased student engagement; (3) using a targeted approach in implementing instructional support during professional learning communities and fostering collaboration to support teacher capacity. The implications of this research involved identifying a strong need to provide teachers with instructional leadership and support to meet the ongoing learning needs of English language learners and low-socioeconomic students in a Title 1 urban high school
Missing Voices in Literacy Development for the d/Deaf
No full textThe purpose of this phenomenological study is to explore the metaphorical voices of participants who are d/Deaf. This group is a small minority within the mainstream public education system as deafness is a low incidence occurrence. This qualitative study seeks to examine the ontology of how the social phenomenon of inclusion influenced literacy development for learners who are d/Deaf. Each individual’s experience is their own unique perspective deserving a voice; however, the d/Deaf voice or perspective is often absent and silenced. This study seeks to explore the lived experiences of individuals who are d/Deaf in developing literacy skills in mainstream public education inclusion settings. This study seeks to explore how participants who are d/Deaf engaged in developing literacy skills in mainstream public education inclusion settings. Participants chose the modality of communication (signed or spoken), preferred language (American Sign Language or English) as well as preference of how they participate via Deaf Cultural American Sign Language Storytelling or electronic interviews. Social constructivism paradigm encompasses language ideology which along with the national educational system, as both are socially made. Within this manufactured setting, students and educators are entangled in a relationship impacted by struggles for power compounded by socially constructed audism and oppression. Educational researchers as well as school-based educators must gain awareness that student development is entangled by these external factors. Mindful inclusion of the voices of the Deaf Community is imperative to better literacy outcomes for future learners
Media Arts Online Learning Environments: Perceptions of Adult Student Learners
No full textAdult student learners have been an increasing student population in higher education since the mid 1940s with introduction of the GI Bill. These students are seeking opportunities to expand their knowledge, increase skills or
understanding in areas of interest, and advance in their professions. However, significant barriers surrounding lack of perceived support, inclusive curriculum, and support resources are reported for these students. Amongst this student
population, research data support the conclusion that adult student learners have high attrition rates, discontinuing their studies prior to completing their degree program. Further research shows that instructors and peer-to-peer
connectedness are influential contributors to persistence and academic success within the adult student learner population. Using a collective-case study design, this qualitative research study explored the experiences of adult student learners enrolled in an online media arts degree program and
identified factors that are perceived as influential to their academic engagement. Emerging themes and patterns from this qualitative study may guide future research in online student experiences for all student populations, including adult student learners
Box 4, Folder 1, Misc. MGN Transcriptions
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