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By Space Force
Suicide prevention is a top military priority every day, but takes on even greater focus each September, designated since 2008 as National Suicide Prevention month.
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By NASA
Researchers used an interferometer that can precisely measure gravity, magnetic fields, and other forces to study the influence of International Space Station vibrations. Results revealed that matter-wave interference of rubidium gases is robust and repeatable over a period spanning months. Atom interferometry experiments could help create high-precision measurement capabilities for gravitational, Earth, and planetary sciences.
Using ultracold rubidium atoms, Cold Atom Lab researchers examined a three-pulse Mach–Zehnder interferometer, a device that determines phase shift variations between two parallel beams, to understand the influence of space station vibrations. Researchers note that atom sensitivities and visibility degrade due to the vibration environment of the International Space Station. The Cold Atom Lab’s interferometer uses light pulses to create a readout of accelerations, rotations, gravity, and subtle forces that could signify new physics acting on matter. Cold Atom Lab experiments serve as pathfinders for proposed space missions relying on the sustained measurement of wave-matter interference, including gravitational wave detection, dark matter detection, seismology mapping, and advanced satellite navigation.
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Researchers developed a novel method to categorize and assess the fitness of each gene in one species of bacteria, N. aromaticavorans. Results published in BMC Genomics state that core metabolic processes and growth-promoting genes have high fitness during spaceflight, likely as an adaptive response to stress in microgravity. Future comprehensive studies of the entire genome of other species could help guide the development of strategies to enhance or diminish microorganism resilience in space missions.
The Bacterial Genome Fitness investigation grows multiple types of bacteria in space to learn more about important processes for their growth. Previous studies of microorganism communities have shown that spaceflight can induce resistance to antibiotics, lead to changes in biofilm formation, and boost cell growth in various species. N. aromaticivorans can degrade certain compounds, potentially providing benefits in composting and biofuel production during deep space missions.
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Researchers burned large, isolated droplets of the hydrocarbon n-dodecane, a component of kerosene and some jet fuels, in microgravity and found that hot flames were followed by a prolonged period of cool flames at lower pressures. Results showed that hot flames were more likely to unpredictably reignite at higher pressures. Studying the burn behavior of hydrocarbons assists researchers in the development of more efficient engines and fuels that reduce fire hazards to ensure crew safety in future long-distance missions.
The Cool Flames investigation studies the low-temperature combustion of various isolated fuel droplets. Cool flames happen in microgravity when certain fuel types burn very hot and then quickly drop to a much lower temperature with no visible flames. This investigation studies several fuels such as pure hydrocarbons, biofuels, and mixtures of pure hydrocarbons to enhance understanding of low-temperature chemistry. Improved knowledge of low-temperature burning could benefit next-generation fuels and engines.
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NASA astronaut Shane Kimbrough completing the Multi-user Droplet Combustion Apparatus reconfiguration to the Cool Flames Investigation setup.NASAView the full article
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By NASA
For every NASA astronaut who serves as a public face of human spaceflight, there are thousands of people working behind the scenes to make the agency’s missions a success. Even the smallest tasks impact NASA’s ability to explore and innovate for the benefit of humanity.
The team of administrative assistants and secretaries who work at the Johnson Space Center in Houston are acutely aware of this fact.
Whether they are coordinating meetings, arranging travel, or preparing materials and information for Johnson’s leaders, this team of over 90 individuals takes pride in providing critical support for the agency’s programs and managers. “We work hand-in-hand with management to get them where they need to go and ensure they have what they need to continue doing their important work,” said Carla Burnett, an executive assistant in the Center Director’s Office who is also the lead for all of Johnson’s administrative staff.
Carla Burnett participates in NASA’s celebration of the 60th anniversary of President John F. Kennedy’s historic Moon speech, held at Rice Stadium in Houston on Sept. 12, 2022. Image courtesy of Carla Burnett Burnett has turned her long-standing passion for administrative work into a 41-year career at Johnson. She was just a youngster when she started working in the Astronaut Office mailroom – an opportunity that came through her high school’s Office Education Program. “Being a meek and mild high school student, sitting there with the astronauts, going through all of their fan mail – I was in awe! It was an absolute honor,” she said. That experience and earning recognition as her high school’s Office Education Student of the Year confirmed for Burnett that administrative work was the right career path for her. She said that fidelity and perseverance launched her from the Astronaut Office mailroom to a position as a crew secretary for two space shuttle flights. “Being a servant and helping others is what I really love about administrative work,” she said.
Today, Burnett supports Johnson’s senior executives and serves as a central resource for the rest of the administrative team. “They are all very self-sufficient and work within their own organizations,” she explained, but she may coordinate team-wide meetings, celebrations, or trainings, and she is always available to help answer questions. “We work consistently as a cohesive team. We are knowledgeable and, may I add, exceptional at what we do because we do it for the benefit and success of our Johnson family, NASA, and a plethora of communities!”
Burnett’s dedication to service is reflected across the administrative team, as is a commitment to caring for others. Edwina Gaines, administrative assistant for the Extravehicular Activity and Human Surface Mobility Program, said that being an instrument of team success and the opportunity to build long-lasting friendships are the most rewarding parts of her job. “That connection to people is important,” she said. “It’s important for me to know who I’m supporting or working with.”
Edwina Gaines snaps a selfie during a professional development event for administrative professionals in 2023. Gaines joined the Johnson team as a contractor nearly 20 years ago thanks to an opportunity that arose from her volunteer work at church. A church partner, the Houston Area Urban League, was helping a NASA subcontractor fill a secretarial position through the Small Business Administration’s HUBZone Program. Gaines got the job.
Since then, she has supported four programs and two institutional organizations, getting to know several agency leaders quite well. Gaines said she paid attention to little details – like which managers preferred printed materials over presentations, how they organized their offices, and when they typically stopped for coffee or something to eat – and worked to stay one step ahead of them. She recalled one occasion when she realized a manager had not taken a break in five hours and brought her something to drink. “It’s about taking care of the people who are doing the mission. If you don’t take care of yourself, you can’t complete the mission,” she said.
Rick Pettis, the administrative officer for the Center Operations Directorate, appreciates being part of a great team. Pettis has worked at Johnson since 2014, when he retired from the U.S. Navy after 23 years. “I enjoy helping people with problem solving,” he said. “Every day there will be someone who calls me to ask, ‘How do I get this done?’”
Rick Pettis poses with a spacesuit display.Image courtesy of Rick Pettis The administrative team’s work involves other highlights, as well. “When I met my first astronaut, I was in awe,” said Dottie Workman, a secretary supporting Johnson’s External Relations Office. “I couldn’t believe that someone so important was walking around the campus just like everyone else. He was so nice – he shook my hand and took the time to talk to me.”
Workman has been a civil servant for 52 years and 29 of those have been spent at Johnson. “My career has taken me all over the United States and Germany,” she said. “When my son was in the military and stationed at Ft. Sam Houston in San Antonio he said, ‘Mom, why don’t you move to Texas?’ I didn’t have a good reason to say no, so here I am!”
Dottie Workman met J.J. Watt, former professional football player with the Houston Texans, during his visit to Johnson Space Center. Image courtesy of Dottie Workman. Outside of meeting and interacting with astronauts, Workman said being able to share NASA with her family and friends is her favorite part of working at Johnson. “It is always exciting to see their reaction,” she said.
Burnett is thankful for a united team that understands the value of their work. “I’m grateful to work with a group of professionals who know the significance of propelling today’s men and women into the next generation of deep space for years to come,” she said. “We are Artemis proud!”
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By NASA
Researchers successfully produced cellulose from bacteria cultured on the International Space Station for four weeks. The bacteria used in the experiment, K. hansenii, is known to produce the highest amount of cellulose and could be considered for large-scale production in microgravity to support the development of materials used in construction, clothing, and the supply of energy.
Ice Cubes Experiment Cube #4, #5- Kirara, a temperature-controlled module typically used for protein crystallization, was used here to incubate the target bacteria. Researchers developed a customized methodology that consisted of adjusting gas and air in various culture vessels in low-temperature conditions. Future studies could help to promote large scale production of bacterial cellulose to support deep space exploration.
Researchers studied two properties of oil-in-water emulsions in microgravity (i.e., drop size and drop displacement at a constant speed and direction), finding that while oil drops grow over time, drop displacement decreases. This was an unexpected observation in microgravity where neither sedimentation nor creaming occurs. These results could improve knowledge of fluid mechanics relevant to industrial processes on Earth and enable technologies for space exploration.
Fluid Science Laboratory (FSL) Soft Matter Dynamics – Particle STAbilised Emulsions and Foams (PASTA) studies the dynamics of droplets to enhance understanding of coalescence and size evolution in emulsions. Emulsions are systems where two unmixable fluids are combined via small droplets inside the second liquid. Researchers explained that drop growth was the result of aggregation (or coalescence) between small drops colliding with each other. Enhanced understanding of coalescence, a property that is associated with the stability of surfactants such as oils, dyes, and detergents, can lead to a safer environment and sustainability of certain emulsion technologies in multiple arenas such as the food, pharmaceutical, paint, and lubrication industries.
Documentation of a sample that was removed from the Fluid Science Laboratory (FSL) during operations to exchange samples inside the FSL Soft Matter Dynamics (SMD) experiment container. NASA/Samantha Cristoferetti Nystagmus, a condition associated with vestibular imbalance and cerebellar dysfunction characterized by rapid and uncontrollable eye movements, was detected in about 45% of crew members soon after landing. Correct diagnosis of this condition enables the development of strategies and countermeasures for a speedy recovery after spaceflight.
In the Field Test investigation, researchers investigated the complexity, severity, and duration of physical changes that occurred in astronauts after spaceflight. Astronauts and cosmonauts that live in space for extended periods experience physical changes that have noticeable effects once they return to Earth’s gravity, including changes to vision, balance, coordination, blood pressure, and the ability to walk. Some crew members showed nystagmus in several gaze positions, with significant recovery identified 10 to 13 days postflight. These results expand researchers’ understanding of vestibular disorders, adaptations to spaceflight, and dynamics of recovery after prolonged microgravity exposure.
NASA Human Health and Performance Directorate personnel assess hardware used in the Field Test investigation.NASA/Lauren HarnettView the full article
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By European Space Agency
On 8 September 2024, the first of four satellites that make up ESA’s Cluster mission will reenter Earth’s atmosphere over the South Pacific Ocean Uninhabited Area.
This marks the end of the historic mission, over 24 years after it was sent into space to measure Earth’s magnetic environment. Though the remaining three satellites will also stop making scientific observations, discoveries using existing mission data are expected for years to come.
This ‘targeted reentry’ is the first of its kind. ESA’s efforts to ensure a clean end to the Cluster mission go beyond international standards, making the agency a world-leader in sustainable space exploration.
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