Research

Robotics research to help strengthen domestic battery supply chain

Emily Adams — Thu, 05 Dec 2024 18:16:48 +0000

Robotics research to help strengthen domestic battery supply chain Emily Adams Thu, 12/05/2024 - 11:16

Computer scientist Nikolaus Correll and his lab have been awarded $1.8 million by the U.S. Department of Energy Advanced Research Projects Agency-Energy (ARPA-E) to help establish a circular supply chain for domestic electric vehicle (EV) batteries.

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CUriosity: Can humans handle the stress of traveling to Mars?

Jeff Zehnder — Fri, 15 Nov 2024 18:28:22 +0000

CUriosity: Can humans handle the stress of traveling to Mars? Jeff Zehnder Fri, 11/15/2024 - 11:28

In June, NASA astronauts Butch Wilmore and Suni Williams boarded the International Space Station (ISS), expecting a week-long stay in orbit. Now, they won’t return to Earth until February after a series of technical issues plagued the Boeing Starliner space capsule they rode into space on.

If spending eight months on the ISS, which measures just 5,000 square feet, sounds like a recipe for frayed nerves, it may very well be. That’s according to Arquilla, an engineer who has studied how long space journeys can affect the mental health of humans.

“On long-duration space missions, there are many stressors that create the potential for negative mental health effects,” she said. “From data taken in research facilities in extreme environments on Earth, like Antarctica, we have seen symptoms of depression, anxiety and stress.”

A future mission to Mars, however, could be a lot more than eight months, potentially as much as three years. Which raises the question: Can humans handle that much time in space?

Arquilla thinks so, but there are caveats.

“It will be a big challenge,” she said. “There’s a lot we don’t know because we haven’t sent people to Mars before. They won’t be able to look down and see the Earth the way they can on the International Space Station.”

In previous research, Arquilla and her colleagues explored the mental health consequences of that kind of isolation through an unlikely event here on Earth—the COVID-19 pandemic. In 2020, millions of Americans were suddenly cooped up in their homes with the threat of a major disease hanging over their heads. The researchers conducted a survey and observed that people with military training or other experience in stressful environments tended to be more productive during the pandemic than others. But those experienced individuals didn’t appear to maintain their mental health better than less experienced people.

Arquilla noted that simply being aware of your own body, and knowing when stress sets in, can help. She has partnered with Laura Devendorf, a researcher at CU �鶹ӰԺ’s ATLAS Institute, to assist people in doing that kind of monitoring. The team integrated sensors into comfortable textiles that track electrocardiogram (ECG) signals coming from wearers’ hearts.

“Maybe I'm an astronaut on a mission and I'm tracking my own signals, and I see that my heartrate starts to go up,” Arquilla said. “I could decide based on that that I should take a break for a couple of hours.”

This research won’t just help astronauts. Arquilla is also exploring how similar technologies could give people on the ground tools to detect and manage symptoms of mental health changes in high-stress environments. That might include wilderness expeditions, remote research facilities and military deployments.

She’s glad to see people talking more about mental health, both on Earth and in space.

“We all, after the pandemic, understand the importance of mental health a lot more than we did maybe 10 years ago,” she said. “Being able to recognize that it's okay to not feel at 100% all the time, and being able to give people the tools they need to articulate what is wrong, is really important.”

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Engineers transform smartphones into instruments for studying space

Jeff Zehnder — Fri, 15 Nov 2024 18:25:39 +0000

Engineers transform smartphones into instruments for studying space Jeff Zehnder Fri, 11/15/2024 - 11:25

That ordinary smartphone in your pocket could be a powerful tool for investigating outer space.

In a new study, researchers at Google and CU �鶹ӰԺ have transformed millions of Android phones across the globe into a fleet of nimble scientific instruments—generating one of the most detailed maps to date of the uppermost layer of Earth’s atmosphere.

The group’s findings, published Nov. 13 in the journal Nature, might help to improve the accuracy of GPS technology worldwide several-fold. The research was led by Brian Williams of Google Research and included Jade Morton, professor in the Ann and H.J. Smead Department of Aerospace Engineering Sciences at CU �鶹ӰԺ.

“These phones can literally fit in your palm,” Morton said. “But through crowdsourcing, we can use them to change the way we understand the space environment.”

She and her colleagues used the GPS sensors that come standard in every smartphone to collect data on how Earth’s atmosphere warped signals coming from satellites. In the process, they were able to view phenomena in the atmosphere, such as blobs high above the planet known as “plasma bubbles,” in never-before-seen detail.

The group released its data publicly so that anyone can watch how the atmosphere swirled and shifted over about eight months.“Collaboration is central to scientific progress and to our scientific research at Google,” said Lizzie Dorfman, product lead for Science AI in Google Research. “Dr. Morton’s expertise was essential to this research, and it has been an absolute pleasure working with her as a visiting researcher and collaborator.”

Eye on the ionosphere

The study puts new focus on the ionosphere, a wispy layer of the atmosphere that stretches more than 350 miles above Earth’s surface.

It’s a volatile arena: Here, rays from the sun constantly beat down on the atmosphere, splitting its molecules and atoms into a soupy mix of charged particles—what scientists call a plasma. It also never stays still.

“At 2 o'clock in afternoon, there are a lot more charged particles in the ionosphere because the sun is at its strongest,” Morton said. “But at night, the sun is on the other side of the planet, so we have very few charged particles.”

That fluctuation can play havoc with GPS technology.

Morton explained that the technology works through a sort of stopwatch in space: Satellites thousands of miles from Earth first beam radio waves to the planet. Your phone then pinpoints your location by measuring how long it takes those signals to reach the ground.

Scientists try to account for how the ionosphere might shift that timing by mapping this region of space using radar dishes on the ground. Currently, however, they can only observe about 14% of the ionosphere at any one time. As a result, GPS devices may miss your exact location by anywhere from a few to several dozen feet.

“There are a lot of applications that require a lot of accuracy—for example, landing aircraft,” Morton said.

Bubbling up

In the current study, the researchers landed on an unusual idea: Rather than rely on expensive radar dishes, they could map the ionosphere using a suite of sensors that already existed in every country on Earth: Android phones.

The ionosphere maps are created using aggregated measurements of the radio signals between satellites and the receivers in some Android devices. Privacy protections ensure these measurements do not identify any contributing individual devices.

In particular, the group used the phones to track in real time how the ionosphere stretches out radio waves coming from satellites.

The team reported that, on its own, this worldwide fleet could observe roughly 21% of the ionosphere—potentially doubling the accuracy of GPS devices worldwide.

“Millions of phones together can do a much better job of monitoring the atmosphere than our ground network,” Morton said.

The group’s maps also capture the ionosphere in brilliant detail.

In May 2024, for example, a powerful solar storm struck Earth just as the group’s cell phones were looking up. In the hours that followed, huge regions of atmosphere, or “plasma bubbles,” containing low concentrations of charged particles formed above parts of South America. Those bubbles then rose through the ionosphere like wax in a lava lamp.

Morton, for her part, says the study shows the untapped potential of the everyday technologies that many people take for granted.

“I have spent my lifetime building dedicated instruments to do scientific research,” Morton said. “But as technology advances in our society, we see all these sensors at our disposal that have a lot more power than we ever imagined.”

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Using nanoscale membranes to clean water on the Moon

Anonymous — Wed, 16 Oct 2024 14:47:43 +0000

Using nanoscale membranes to clean water on the Moon Anonymous (not verified) Wed, 10/16/2024 - 08:47

Jeff Zehnder

Kian Lopez (L) and Anthony Straub (R) in the lab.

Anthony Straub is making major advances in water purification technology for industry and human consumption on Earth and in space, with his work on a nanotechnology membrane process taking a major step toward commercialization, thanks to a new NASA grant.

An assistant professor in the Department of Civil, Environmental and Architectural Engineering at the �鶹ӰԺ, Straub’s research focuses on using membranes to improve water treatment.

“The membrane technology that is widely used now is essentially half a century old, and it has well-known limitations,” Straub said. “ It works well for many applications, but it has a tendency to let certain impurities through and it degrades if exposed to certain harsh chemicals.”

NASA has awarded Straub and one of his PhD students, Kian Lopez, a phase one Small Business Innovation Research award to develop a pilot water purification system for astronauts to use on a future Moon base.

Current space water purification systems are bulky and prone to repairs. The technology Straub’s lab has developed only requires a pump to pressurize water, reducing size and weight. Low weight is especially important in moon missions, where every kilogram of cargo can cost tens of thousands of dollars.

“Current membranes remove impurities based on size and charge and, as a result, allow for small impurities to bypass the membrane,” Straub said. “What we’ve designed traps a very small layer of air inside a membrane and the only way for the water to cross the barrier is by evaporating and then re-condensing on the other side, which impurities inherently cannot do.”

The entire process occurs over a 100 nanometer span, a distance 160 times smaller than the width of a human hair, and the water that results is nearly pure H2O – distillation quality — since it has been turned to steam and then back to liquid.

These new membranes can be made from a wide variety of materials; the advance is in modifying them to create the air trapping layer. Although the work has been a longtime focus of Straub, he had not considered space applications or commercialization until Lopez returned from an internship at NASA.

Schematic of the membrane process.

“My mentor at NASA said this technology looks promising and the biggest impact we could have would be to start our own company,” Lopez said.

Straub and Lopez decided to attend the New Venture Launch class together in the CU �鶹ӰԺ Leeds Business School, participating in campus technology transfer initiatives, including the New Venture Challenge and Lab Venture Challenge. They founded Osmopure Technologies, Inc. in January of this year.

Space is but one application. Other potential is in municipal water systems and industry, particularly semiconductor or computer chip manufacturing, which requires ultrapure water.

Although ultrapure sounds like a marketing buzzword, it has a formal definition: water free of all minerals, particles, bacteria, microbes, and dissolved gasses. The needs go far beyond water that is safe for human consumption.

“The minimum for ultrapure water in chip manufacturing is a 14-step process right now. The final product must contain less than one 10-nanometer particle per milliliter of water, which would be the density equivalent of having only a single person on the entire planet Earth,” Lopez said.

Semiconductor chips are manufactured in clean rooms, and ultrapure water is necessary to maintain temperature and humidity as well as to wash away residue produced during chip etching. Even the tiniest water impurities can damage the chips.

“Our work starts with NASA, but the beachhead market here on Earth is in ultrapure water production for semiconductors,” Straub said. “This is a huge potential market, and we have filed a provisional patents with Venture Partners at CU �鶹ӰԺ.”

Straub is optimistic the grant will enable them to make significant progress in the coming months.

“This has been a four-year process, and at the beginning we didn’t know if it would work,” Straub said. “We started with theory and then went into the lab to test. The fabrication has gone through several iterations here in the CU labs. Now we are moving towards a commercial product, and the performance is impressive.”

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CU �鶹ӰԺ will share atmospheric science tech, expertise through new grant

Anonymous — Mon, 07 Oct 2024 22:27:53 +0000

CU �鶹ӰԺ will share atmospheric science tech, expertise through new grant Anonymous (not verified) Mon, 10/07/2024 - 16:27

Jeff Zehnder

Drone technology and atmospheric science instruments developed by the �鶹ӰԺ will be available to researchers nationwide through a new grant.

The National Science Foundation has awarded CU �鶹ӰԺ a three-year, $1 million grant to establish a Community Instruments and Facilities program titled Mobile Uncrewed Systems for Atmospheric Science (MUSAS).

“We have a track record for atmospheric research with the equipment we’ve created and the campaigns we’ve partnered in. Whenever atmospheric scientists need to collect data in environments they can’t get other ways, that’s where we come in,” said Brian Argrow, principal investigator for the grant.

Argrow, a professor in the Ann and H.J. Smead Department of Aerospace Engineering Sciences, is a nationally recognized expert in uncrewed aerial systems. He and CU �鶹ӰԺ colleagues have spent decades developing fixed-wing and quad-copter-style drone systems to study weather and other atmospheric conditions.

Their work has spanned the globe, including in extreme conditions like the North Pole and several campaigns in the United States to analyze supercell thunderstorms that spawn tornadoes.

The new grant will provide the larger scientific community access to CU �鶹ӰԺ’s instrumentation and know-how.

“We’re bringing aerospace to the atmospheric sciences community,” Argrow said. “We have the expertise, the drones, the deployment systems, and regulatory approval to fly in the national airspace system.”

Although the program does not officially begin until Nov. 1, Argrow said they have already been contacted by a university with a partnership proposal.

Inspecting a RAAVEN drone while on deployment.

“By increasing access to small uncrewed aerial systems, we’ll increase the amount of data available to the broader community to help solve some of the toughest problems in atmospheric science. Our technology can sample the physics and chemistry of the lower atmosphere and offer new perspectives on this environment,” Argrow said.

MUSAS joins a network of NSF-supported initiatives across the country that allow universities to share research equipment and expertise.

Through the program, partners will have access to CU �鶹ӰԺ’s personnel as well as the RAAVEN and Super RAAVEN fixed-wing drones and the CopterSonde 3 quad-copter, along with deployment and tracking vehicles.

Argrow anticipates an array of research to come from the partnerships, including into boundary layer processes, coastal circulations, aerosol processes, turbulence and turbulent fluxes, surface-atmosphere exchange, high-latitude environments, and severe weather.

“Building on the initial investment from the CU Grand Challenge Initiative, we have assembled infrastructure which is unique,” Argrow said. “CU �鶹ӰԺ has extensive experience operating and developing these systems, and this gives us the opportunity to expand our impact.”

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Professor earns two major grants to advance AI for autonomous systems

Anonymous — Fri, 06 Sep 2024 17:29:05 +0000

Professor earns two major grants to advance AI for autonomous systems Anonymous (not verified) Fri, 09/06/2024 - 11:29

Jeff Zehnder

Zach Sunberg’s research developing better artificial intelligence systems is getting a major boost from two federal grant awards.

Sunberg is receiving a $599,000, five-year CAREER Award from the National Science Foundation and is a partner on a related $4 million multi-university initiative from the U.S. Office of Naval Research.

Both projects focus on advancing game theory algorithms so AI systems can better solve problems in real-time in the field.

“I’m excited to receive the recognition that I’m looking at important problems to solve in both of these areas,” Sunberg said. “ONR shows the relevance for defense applications, and the NSF award focuses on making our nation and our world a better place.”

Sunberg is an assistant professor in the Ann and H.J. Smead Department of Aerospace Engineering Sciences at the �鶹ӰԺ. His research focuses on autonomous systems and AI, with an emphasis on game theory.

Although game theory has origins in solving tabletop board games and card games, it is a broad field of research that studies problem-solving in complex, real-world situations.

“You might think of a game as a board game, but any situation where multiple agents are interacting and have their own goals can be mathematically represented as a game. Poker has clear rules, but so does driving a car; there are just a lot more variables,” Sunberg said.

AI systems like those used in self-driving cars typically rely on offline reinforcement learning. In such a system, automakers use historical data collected from a fleet of vehicles to optimize an algorithm to react to future situations. Sunberg is seeking to develop online decision-making systems, where an AI can think in real time to interact with situations that do not match historical data.

“This has previously been considered a computationally intractable problem” Sunberg said. “But our lab recently had a breakthrough with single-agent planning where we proved we did not need a lot of computation even in a large state space. What we want to do next is work on more complex multi-agent situations.”

The research focuses on a framework used by scientists and engineers to model possible outcomes when full data is not available, called partially observable Markov stochastic games.

“An application is airborne collision avoidance. In the past, the other pilot’s actions would be modeled as a probability distribution. That wasn’t satisfying to me. The other pilot is a decision maker themselves, so it would be better to model as a multi-agent game, but we don’t know how to solve partially observable games like that using online systems,” Sunberg said.

The research from the NSF grant has applications across an array of autonomous systems, from search and rescue robots, to self-driving cars, to how satellites navigate while orbiting the Earth. The Navy award is focused more on AI deception and counter deception in the military realm.

“An enemy is going to try to deceive you in some way, so we want to focus on how that can happen and how do we make AI resistant to it. We’re also looking at developing AI that can deceive an adversary. If you have a drone that you want to avoid enemy air defenses, how can it use bluffing to help it do that,” Sunberg said.

The ONR award is brings together four universities. The project is being led by the Georgia Institute of Technology with partners at the University of California Santa Barbara, CU �鶹ӰԺ, and the University of Texas at Austin. Sunberg’s portion of the $4 million grant is worth roughly $1 million.

“The current most widely used methods for AIs, these offline systems, are really a function approximater. It’s kind of an intuitive reaction or instinct. We want an AI that can go further, like people, and think and deliberate about a situation. There’s huge potential with this work,” he said.

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How Earth’s most intense heat wave ever impacted life in Antarctica

Anonymous — Wed, 04 Sep 2024 20:47:39 +0000

How Earth’s most intense heat wave ever impacted life in Antarctica Anonymous (not verified) Wed, 09/04/2024 - 14:47

As part of a Long-Term Ecological Research (LTER) project in Antarctica, a research team led by Associate Dean for Research Mike Gooseff found that the unexpected melt followed by a rapid refreeze likely disrupted the life cycles of many organisms and killed a large swath of some invertebrates in the McMurdo Dry Valleys.

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Why do plants wiggle? New study provides answers

Anonymous — Thu, 15 Aug 2024 16:59:39 +0000

Why do plants wiggle? New study provides answers Anonymous (not verified) Thu, 08/15/2024 - 10:59

In a new study, researchers from the United States and Israel — including CU �鶹ӰԺ computer scientist Orit Peleg — may have gotten to the bottom of a quirky behavior of growing plants and a mystery that intrigued Charles Darwin during the later decades of his life.

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AI for mental health screening may carry biases based on gender, race

Anonymous — Mon, 05 Aug 2024 16:00:52 +0000

AI for mental health screening may carry biases based on gender, race Anonymous (not verified) Mon, 08/05/2024 - 10:00

Some artificial intelligence tools for health care may get confused by the ways people of different genders and races talk, according to a new study led by CU �鶹ӰԺ computer scientist Theodora Chaspari.

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CU �鶹ӰԺ receives $1M grant to advance biofabrication training for PhD students

Anonymous — Mon, 15 Jul 2024 21:11:35 +0000

CU �鶹ӰԺ receives $1M grant to advance biofabrication training for PhD students Anonymous (not verified) Mon, 07/15/2024 - 15:11

Susan Glairon

The Materials Science and Engineering Program at the �鶹ӰԺ received a $1M grant to fund interdisciplinary doctoral research training in biofabrication, a rapidly developing field which enables more precise and effective ways to study and treat various medical conditions, such as growing new organs for transplants or repairing damaged tissues.

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