62970 research outputs found
Sort by
Resonating with Teachers’ Realities: An Exploration of Emotional Support in Secondary Mathematics Coaching Relationships
No full textTeacher attrition and burnout rates continue to rise, with nearly half of teachers leaving the profession within their first 5 years. In this context, instructional coaches have emerged as crucial supports for teacher wellbeing and retention. While research has established the importance of emotional support in educational settings, limited attention has been paid to how such support is systematically cultivated within coaching relationships. Through the lens of Bronfenbrenner’s ecological systems theory, specifically focusing on microsystem interactions, this qualitative collective case study examined how emotional validation and care are cultivated through discourses and interactions between instructional coaches and secondary mathematics teachers within their immediate coaching environment.
The study followed three instructional coaches and three secondary mathematics teachers in suburban North Texas districts, collecting data through multiple interviews, document analysis, and researcher reflexive journaling over time. Analysis revealed how coaching relationships operate as complex microsystems where physical environments, emotional validation practices, and care routines work together to create conditions for teacher growth. Key findings demonstrated that environmental design plays a more fundamental role than previously recognized, with dedicated spaces and thoughtful structural elements actively shaping coaching relationship development. These findings extend Bronfenbrenner’s microsystem theory and coaching literature by demonstrating how developmental processes can be systematically supported within professional relationships while remaining responsive to emerging needs. The research suggests that investing in dedicated coaching spaces, developing systematic validation practices, and establishing clear support structures may be as crucial as traditional coach training for program success
Synergistic Integration of Biological Pretreatment and Desalination for Enhanced Hybrid Wastewater Treatment in Life Support Systems
No full textIn this dissertation, we evaluate a potential hybrid system for long-term human space travel. Hybrid wastewater processing systems that include both biological pretreatment and desalination provide multiple benefits. This alternative is a low-cost and reliable process that can eliminate the need for hazardous chemicals and treat all proposed wastewater. This hybrid treatment system for recycling greywater and urine + flush water (U+F), consists of variable volume full-scale bioreactors, Reverse Osmosis (RO), and a distillation system. The main task for this study was to separate greywater from U+F, which could produce a high-quality, high-volume resource amenable to RO, while a distillation system desalinates the low-quality, low-volume U+F. However, to our knowledge, studies have yet to evaluate hybrid treatment systems for habitation wastewater.
The Greywater MABR and RO system objectives were to evaluate 1) the greywater MABR and RO system effluent quality, 2) hollow fiber microporous membrane filtration modules (MFM) permeate quality, and 3) use the greywater MABR as an RO recycle tank. For the first task, the greywater MABR effluent was transferred to the RO system as a pulse once daily. The RO system operated in batch mode until 90% recovery, and the brine (10% of the influent) was drained to the distillation vessel. For the second configuration, three MFMs were installed in the MABR effluent zone to achieve better efficiency. Greywater MABR effluent was produced continuously and collected in the RO system recycle tank for further treatment. Thirdly, in this test point, the brine from the RO system returns to the greywater MABR.
The second experiment was to evaluate the U+F MABR and the distillation system. System performance regarding processing capacity, rate, and water quality was evaluated. This research effort explored the impact of full nitrification (e.g., production of NO3- as end product) compared to nitritation (NO2- as end product), the impact of influent pH or the use of an in-line NH3 trap, and the ability to continuously process biologically stabilized wastewater without brine or salts removal.
This dissertation provides data on the required sizing, RO permeate and distillate quality, and subsequent impacts on downstream polishing systems, as well as required consumables for hybrid systems that can be used to down-select promising architectures. Here, we report on the performance of each configuration and the required mass, volume, and consumable requirements. This work provides critical data to allow hybrid systems to be evaluated for partial gravity habitation systems and potentially increase the sustainability of human space habitation
Verification of an Actively Shuttered Dust-Resilient Radiator for Lunar Applications
Get PDFAndrew S. Gibson, ESR Technology, United KingdomOlly Poyntz-Wright, ESR Technology, United KingdomMatthew K. Oldfield, ESR Technology, United KingdomAngus Bishop, ESR Space, United KingdomAngel Iglesias, Almatech, SwitzerlandMartin E. Humphries, Spacemech Limited, United KingdomPhilipp B. Hager, European Space Agency (ESA) / European Space Research and Technology Centre (ESTEC), NetherlandsICES104: Advances in Thermal Control TechnologyThe 54th International Conference on Environmental Systems was held in Prague, Czechia, on 13 July 2025 through 17 July 2025.Thermal control devices for the lunar surface must consider
the effects of lunar dust in terms of thermal performance,
as well as reliability of the mechanism over an extreme
range of temperatures. The development challenge is
increased when attempting to design such a device as a
generic, scalable product to operate at any latitude across
the lunar surface. Radiator functionality is influenced by
lunar environmental temperatures and must consider IR
heating during the lunar day as well as heat losses during
the Lunar night. The Lunar Thermal Shutter (LTS), developed
by ESR with the support of Almatech and Spacemech, enables
closure of a radiator to minimize heat losses at night. In
addition, the LTS is also intended to protect from
contamination during events and phases of the day with high
expected dust deposition, such as the passing of the
day/night terminator, landing, or activities of astronauts,
rovers or robotic equipment. The paper describes
advancements of the LTS made following three years of
development, focusing on the status of thermal vacuum and
dusty vacuum tests, where this device is intended to be
suitable for use in various lunar applications, including
on landers (such as for example Argonaut), rovers and other
longer duration lunar surface applications. Thermal
analysis cases are summarized including the results of
correlation with thermal vacuum testing completed in August
2024 that included assessment of turn-down ratios over
temperature
The Thermal Subsystem of Mars Connect: Miniature Probes for a Meteorological Network on the Mars Surface
Get PDFAlejandro Gonzalo, National Institute for Aerospace Technology (INTA), SpainIgnacio Arruego, National Institute for Aerospace Technology (INTA), SpainVíctor Apéstigue, National Institute for Aerospace Technology (INTA), SpainLaurent Bastide, National Institute for Aerospace Technology (INTA), SpainJoaquín Azcue, National Institute for Aerospace Technology (INTA), SpainJavier Martínez-Oter, National Institute for Aerospace Technology (INTA), SpainJosefina Torres, National Institute for Aerospace Technology (INTA), SpainManuel Reina, National Institute for Aerospace Technology (INTA), SpainNieves Caballero, National Institute for Aerospace Technology (INTA), SpainGabriel Liaño, National Institute for Aerospace Technology (INTA), SpainMaría Antonia de la Torre, National Institute for Aerospace Technology (INTA), SpainSantiago Martín, National Institute for Aerospace Technology (INTA), SpainICES102: Thermal Control for Planetary and Small Body Surface MissionsThe 54th International Conference on Environmental Systems was held in Prague, Czechia, on 13 July 2025 through 17 July 2025.Over the last decades, several missions have successfully
landed on Mars, placing scientific instrumentation onboard
landers and rovers in different landing sites. However, a
qualitative leap in “in-situ” climate science could happen
via larger-scale observations targeting multiple locations
simultaneously. Mars Connect is an INTA program aimed to
develop microprobes with scientific instruments that,
thanks to their reduced mass, volume and power consumption,
could be conveyed piggyback to Mars by a single carrier,
and deployed on the Martian surface in large numbers to set
up planetary atmospheric networks.
The approximately 12.5 kg probe consists of a rigid
aeroshell enclosing a 7 kg, 3-section, hard-impact
penetrator that can accommodate up to 1 kg of payload. The
simplified aeroshell, which decelerates and stabilizes
itself during the descent, includes an ablative heatshield
to guarantee the probe’s integrity. Preliminary estimations
of aerothermal loads for a range of trajectories and
atmospheric conditions yield heat flux peaks of 200 W/cm²
and integrated heat loads of up to 11,000 J/cm². Once on
the Mars surface, the penetrator relies on the wide
allowable temperature range of most of its equipment,
subjected to extensive qualification campaigns for previous
missions. It also includes a highly insulated “warm
compartment” for elements to be maintained within more
stringent limits.
The landing site latitude will determine the surface
temperature and solar irradiance along the year, and thus
the power production of the penetrator solar cells and the
energy needed by its thermal control heaters. The current
work will firstly describe the mission environments
relevant to the dimensioning of the probe thermal
sub-system. Then, it will provide an overview of the
preliminary thermal design for both the aeroshell and the
penetrator. Finally, surface operations will be addressed,
to assess the scientific capabilities depending on the
latitude and the feasibility to survive throughout the
Martian year
Exploring the Transformation of the English Horn: Its Origin, Design, Development, and its Continued Relevance
Get PDFThe English horn and its solo repertoire are often overlooked, likely due to
minimal research about its history as an orchestral and chamber instrument, and
composers' limited use in some musical eras. This research paper, " Exploring the
Transformation of the English Horn: Its Origin, Design, Development, and Continued Relevance" explores its evolution from a simple orchestral instrument to one that influences chamber music and stands out in solo performances. Key composers and pivotal musical works that have significantly expanded the English horn's repertoire will be highlighted, illustrating how these contributions have elevated its musical importance, inspired greater artistic exploration, and affirmed its continued relevance and usefulness in present-day orchestral, chamber, and solo performances.
The different factors that have influenced the English horn's solo repertoire
historically, musically, and in terms of performance practice come together to create an instrument with a compelling voice. This study also investigates key solo works that make up the English horn's repertoire and looks at the series of performers and composers who championed the English horn’s relevance in the repertoire. Traditionally, the oboe has been the dominant voice in the solo repertoire of Western art music performed by ensembles, but this research aims to highlight the unique tonal qualities of the instrument, making it an appealing choice for many composers.Related dissertation for this degree -- Exploring the Transformation of the English Horn: Its Origin, Design, Development, and its Continued Relevance: https://hdl.handle.net/2346/102353
Related performance for this degree -- Angeli Nicolas' DMA Oboe Recital 1: https://hdl.handle.net/2346/103887
Related performance for this degree -- Angeli Nicolas' DMA Oboe Recital 2: https://hdl.handle.net/2346/103888
Related performance for this degree -- Angeli Nicolas' DMA Oboe Recital 3: https://hdl.handle.net/2346/103889
Related performance for this degree -- Angeli Nicolas' DMA Oboe Recital 4: https://hdl.handle.net/2346/10389
Radiometric Level Measurement Modeling Study
No full textDaniel Eli Ruiz, University of California - Berkeley, United StatesElizabeth del Rosario Salas-Sandoval, Universidad de Guanajuato, MexicoMichael Flynn, National Aeronautics and Space Administration (NASA), United StatesICES303: 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.In microgravity water in a tank exists as a random mixture
of droplets, films, saturated vapor and bulk water. This
makes it very difficult to measure the level, or mass, of
water in a tank in microgravity. This paper provides an
update on modeling of a method to measure water in a tank
in microgravity using Galactic Cosmic Radiation (GCR). GCR
is charged high energy particles that compose much of the
background of radiation in space. When they collide with
other molecules they create secondary particles. If GCR
encounters water, protons are produced as secondary
particles, and the number and energy of protons produced is
a measurement of the amount of water. Radiometric level
measurement (RLM) is a method that is proposed for use to
determine the amount of water in the tank by measuring the
number and energy of protons generated by its interaction
with GCR. RLM uses one proton sensor which is placed
adjacent to the outside of the tank to measure proton
generation and a second proton sensor placed sufficiently
long distance away from the tank to measure the background
level of protons in space. A GCR sensor is also required to
measures the variation of the GCR background. The
difference between the two proton sensors is a measurement
of the water content of the tank at any specific GCR
background level
A digital forensic profiling triage model for industrial espionage
No full textIn the digital age, information technology has become crucial for business success and, simultaneously, an attractive target for theft.
Stealing trade secrets from others, though risky yet relatively straightforward, has often enabled latecomers to rise to the top tier at minimal costs, both in terms of time and money. As a result, industrial espionage has emerged as one of the most serious and prevalent threats to the long-term growth of business in many companies.
However, addressing industrial espionage in the digital age presents significant challenges for law enforcement agencies that are less tech-savvy due to the following issues:
First, the proliferation of digital devices has led to an explosion of data. This data is incredibly diverse, ranging from personal photos, messages, and bank transactions to work documents and emails, and intermingled.
Second, people are increasingly worried about their information being hacked and tracked through digital devices. Therefore, law enforcement agencies should adapt their investigation procedures to a less invasive manner to enhance data privacy.
Third, compared to other crimes, investigating industrial espionage is more time-consuming, tiresome, and sophisticated. It involves numerous digital devices and systems, as well as a wide range of complex criminal activities that may be linked to various facts or claims.
Fourth, digital forensic investigators responsible for data collection and analysis often lack comprehensive knowledge of industrial espionage, particularly regarding the patterns of the offense, which leads to gathering irrelevant or insufficient data or collecting devices without discretion. This approach results in a massive examination backlog in forensic labs, and it raises concerns about data privacy and due process in court.
Fifth, prosecutors or case investigators have faced the challenge of understanding critical information in a forensic report because of the technical complexity of digital data, such as metadata, geotags, logs, registry entries, artifact records, and more. When properly understood, these below-the-iceberg data can provide a wealth of information about who did what, when, and where.
This dissertation presents a digital forensics profiling triage model (DFPM) designed to address these issues related to industrial espionage.
This model utilizes two different disciplines to generate digital profiles: digital forensic triage techniques, which focus on artifacts and metadata analysis, and crime profiling techniques, which focus on the identification of crime profiles based on investigative experience and cognitions.
DFPM comprises four main parts: developing a profile template, preparing digital data, generating digital profiles, and verifying digital profiles.
Part 1 (developing a profile template) generates typical crime profiles of industrial espionage offenses through the crime profiling process after examining multiple incidents of the same type of crime. Crime profiles resulting from chapter 4 will be used as a template to identify digital profiles in DFPM.
Part 2 (preparing digital data) prepares digital data from a computer for application in digital profiling through the file classification and profile mapping processes. Particularly in the profile mapping, each crime profile created in chapter 4 is mapped to one of the file groups categorized in the file classification.
Part 3 (generating digital profiles) generates digital profiles for a case through the digital profiling process. It consists of profile data gathering, digital profile recognition, and crime montage. Profile data gathering identifies profile data used to generate digital profiles from online or offline events extracted from various data using profile constraints inferred from the crime profiles. The digital profile recognition generates more human-readable digital profiles using profile data. The crime montage process provides the most reasonable crime scene scenario by integrating digital profiles into chronological order.
Part 4 (verifying digital profiles) verifies the reliability and sufficiency of DFPM’s outcomes by assessing if there are inconsistencies between distinct profile data derived from the same events and whether digital profiles can sufficiently draw a crime scene scenario.
Finally, this dissertation provides a prototype tool for DFPM and demonstrates the application of the digital profiling process and digital profile verification process of DFPM through the NIST CFReDS data leakage case study.
This research contributes to industrial espionage investigations at crime scenes, especially within limited timeframes and with shortages of skilled personnel, by generating an overall crime scene scenario built with digital profiles.
By improving comprehension of the crime incident, it could prevent any needless, in-depth investigations to save money and time needed for digital investigations. It also contributes to the body of knowledge by creating a new digital profiling system
The Efficacy of Camera Traps and Acoustic Recorders to Detect Mexican Wolves (Canis lupus baileyi)
Get PDFAutonomous recording units (hereafter, recorders) have been studied as a non-invasive method for surveying wild wolves and collecting pack composition data via detection of and analyzing wolf howls. Their efficacy has been compared to other non-invasive survey methods such as camera traps and scat collection. Several researchers have measured a 1.6-3.2 kilometer detection range of wolf howls in mountainous and forested areas, but the detection decay from high wolf activity sites is largely unknown. Comparing the efficacy of recorders and other non-invasive devices near homesites (e.g., den and rendezvous sites) has been understudied as most studies focus on a larger portion of their territory. The use of recorders to detect uncollared wolf packs has also been understudied. We compared the detection rates and number of detections of two non-invasive methods (camera traps and recorders) to detect Mexican wolves at concentric distances from known homesites and at suitable pup rearing habitat using an existing Resource Selection Function model from July 1st, 2024, through October 27th, 2024 for a total of 17 survey weeks. Camera traps were set to motion-trigger 24/7 and recorders were set to record the first 30 minutes of each hour from 2100 to 0500 (during the times of known wolf howling activity). We found that the detection rates of camera traps decreased significantly from 1.6 km to 4.8 km from homesites. Detection rates and number of detections from both device types experienced a downward trend as distance from a homesite increased. Detection rates between camera traps and recorders did not differ significantly, but camera traps had significantly more detections than recorders during the denning season (July through mid-August). The number of recorder detections were significantly higher during the rendezvous season than during the denning season. Elk detection rate did not significantly influence wolf detection rate because Mexican wolves will choose den and rendezvous locations based on a high presence of elk. Camera trap detections were highest between the hours of 1900 and 0800, and recorder detections occurred throughout 2100 and 0500 with peak activity at 2100 and 0500. Two uncollared wolves were detected on a camera trap at a high pup rearing suitability site. Camera traps are a more effective method of detection during the denning/early rendezvous season when howling activity is low. When howling activity increases, primarily being influenced by the late rendezvous season when wolf pups are more mobile, recorders are just as effective at detecting wolves as camera traps, however camera traps are a consistent detection method across the pup-rearing season
Box 1, Folder 1, MGN Artículos costumbristas
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
Enhancing the Instructional Capacity of Alternative Certified Career and Technical Education (CTE) Teachers
No full textSome children dream of becoming a teacher. They even go as far as knowing the kind of teacher they want to be. Some young athletes dream of becoming a high school football coach one day. They soon realize most coaches are also teachers. They then want to become a teacher. Some people teach Sunday School or perhaps volunteer with a local youth group. They become invested in the lives of young people and desire to make an impact in their local community. Still others choose teaching as a second career because they want to try something different. To the outsider, teaching seems easy enough that they think anyone can do it. Individuals new to the teaching profession often struggle during their first year in the classroom. Some teachers join the profession through the traditional path of an accredited Educator Preparation Program (EPP). Others obtain alternative certification via an approved alternative certification program (ACP). With the implementation of Districts of Innovation (DOI), Local Education Agencies (LEA) now have the flexibility to recruit and hire industry professionals that possess expertise in hard-to-fill teaching assignments by issuing a school district teaching permit (SDTP). The reality is industry expertise does not replace the need for pedagogy knowledge and experience. The purpose of this study is to examine the challenges faced by alternative certified Career and Technical Education (CTE) teachers entering the profession without pedagogy experience and the factors that impact self-efficacy of instructional capacity for the new teachers to the profession