ASU student presents research at Texas Capitol
SAN ANGELO, Texas (Concho Valley Homepage) — Angelo State University senior and physics major YooJin Choi represented ASU by presenting her research project at the recent 2025 Texas Undergraduate Research Day at the Capitol event in Austin.
According to the university, 'Undergraduate Research Day is hosted by the Independent Colleges and Universities of Texas (ICUT) organization and the Council of Public University Presidents and Chancellors (CPUPC) to showcase exciting research from talented undergraduate students at public and private universities across the state.'
The event is only hosted in odd-numbered years during which the Texas Legislature is in session. Texan institutions of higher education may select one student each to present a research poster.
Choi presented research on her project, titled 'Capturing Cellular Dynamics: A Force Center Model Inspired by the Game of Life.' ASU stated that the project was 'which she completed under the mentorship of Dr. Michael C. Holcomb, assistant professor of physics.'
Holcomb was also invited to take part in the event through a panel presentation on 'The Inside Scoop on Academic Research.'
'I have had the pleasure of working with YooJin Choi throughout her undergraduate career, and I am so very proud that she was selected to represent Angelo State at this event,' Holcomb said. 'I have witnessed firsthand her relentless dedication to her academic and research pursuits, and I can confidently say that her accomplishments accurately reflect the immense amount of hard work she puts in to all that she does.'
ASU shared that Choi has received several other accolades. She has received two ASU Faculty Mentored Research Grants for various projects, has worked as a tutor in the Math Lab and served as a physics tutor in ASU's Supplemental Instruction peer-tutoring program. She has also held leadership positions in the Society of Physics Students, Women in Physics and STEM Nexus student organizations.
As part of the service missions of those organizations, she has participated in numerous community outreach activities, including STEM Nights at local elementary schools, Girl Scouts STEMfest and the annual Physics Road Show around West Texas. She has also been active as a percussionist in the ASU Ram Band, Drumline and Symphonic Band.
Additionally, Choi has made the ASU Dean's List every semester and has been inducted into the prestigious Alpha Chi national collegiate honor society and Sigma Pi Sigma national physics honor society.
Choi is scheduled to graduate with her Bachelor of Science degree in May. She has been offered a Distinguished Graduate Student Assistantship at Texas Tech University and will head to Texas Tech this fall to pursue her doctoral degree in physics.
Copyright 2025 Nexstar Media, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.
Hashtags

Try Our AI Features
Explore what Daily8 AI can do for you:
Comments
No comments yet...
Related Articles
Yahoo
a day ago
- Yahoo
Fresno State professor has 2M Instagram followers. His content? 1,700 science toys
Every room in Ray Hall's home features some kind of science toy. Some of the Fresno State physics professor's vast array of toys are simple, like tippy tops that, when spun, suddenly flip to spin on their narrow stems. Others are more complex, like Tesla coils that generate lightning-like electrical currents. Hall's vast array of toys aren't only used in the classroom — they're the star attraction of one of Instagram's most popular science accounts. In his account @physicsfun, Hall shares demonstrations of these toys and explains the physics behind them to an audience of over 2 million followers. 'My goal is to get these toys into the hands of people because it's one thing to watch me manipulate them. But if they're excited enough to buy it and show it to their kids, show it to their friends. That's when the joy of physics starts to spread,' Hall said. Hall has over 1,700 physics toys. Some are less than $10 and others are worth several hundred dollars. Each of Hall's Instagram videos includes a caption linking to sources for further information. The videos follow a consistent formula: they're short and simple, with the toy clearly taking center stage. They demonstrate concepts like chaos theory, gyroscopic stability and magnetic levitation. 'Almost all of my Instagram videos, especially the ones I'm most proud of, make people go, 'What? That's how it works?'' Hall said. 'They get people more invested in science.' Hall also has a YouTube channel with 610,000 followers that he monetizes as well as a Facebook page with 731,000 followers. 'Everything I try to show on Instagram has that little element of surprise like you weren't expecting for that to necessarily happen,' Hall said. 'I also try to make my videos so that they're not overproduced. It's always my hands and I don't really talk to the camera. Hall first decided to share his toys on Instagram in 2015 after his stepdaughter posted a video of one of his tippy tops and it received a lot of likes from her high school friends. But his Instagram account only started growing significantly after his videos went viral on Reddit from 2016 to 2017. His following grew from 6,000 followers to 20,000 in three days. He reached 1 million followers by 2017. 'The biggest key to success on Instagram is continuity and that means having a daily post,' he said. 'YouTube is a different beast. I have someone who mashes up my videos and posts them for me because I just don't have the time.' Hall added that what motivates him to keep making videos is to keep trying to get more people curious about the world around them. 'It's more so a cheerleading to get them to think more deeply and go pursue further content,' he said. Hall's interest in physics dates back to his childhood. He grew up watching science documentaries and visiting museums like the Exploratorium in San Francisco. He recalls spending time with his father who worked for the Los Angeles Department of Water and Power and loved being in his tool shed. 'My dad was a jack of all trades, his garage was full of tools and he was always fixing stuff. I would hang around with him and he would explain to me how things worked,' Hall said. 'And physics I think is kind of the ultimate 'how do things work', so it appealed to me.' A first-generation college student, Hall studied physics at Fresno State, earning his bachelor's degree in 1988 and his doctorate from UC Riverside in 1994. His research focused on high energy particle physics. It was around that time that he came across some physics toys at a shop in Occidental and started collecting them. 'Back when I was a grad student, I did have some teaching responsibilities,' Hall said. 'So it hit me when I was at that shop that sold kites and other toys that I could really teach physics with them.' After grad school, Hall got a job at Fresno State and has been a physics professor at the university since 1999. He teaches physics along with critical thinking classes for students who aren't planning to pursue careers as scientists. 'My passion now is trying to convince people that science is a lot more interesting than pseudo science. There's a lot of awful belief in things, like that the Earth is flat, and people that take it seriously. That concerns me,' he said. 'It seems like there's a fundamental misunderstanding on what science is trying to do.' As for the future of his social media content, Hall said he may explore new formats — possibly videos where he speaks directly to the camera. He also plans to keep searching for new physics toys. 'I'm taking everything one day at a time and I'm not looking to stop,' he said.


Gizmodo
2 days ago
- Gizmodo
Cool Physics Feat Makes a Sphere Roll Down a Vertical Wall
Scientists have discovered that under the right conditions, a gummy bear-like ball can roll down a vertical wall all by itself—upending a core assumption in physics. If you place a rigid sphere on a similarly rigid inclined surface, gravity will cause it to roll down said surface. But what happens if the surface, or plane, is completely vertical? Researchers had previously assumed that, without an initial push, the sphere would simply drop straight to the ground without rolling. New research, however, has just redefined this belief—as well as long-held assumptions in the field of physics. University of Waterloo researchers have revealed the exact scenario necessary to make a sphere roll down a vertical plane without physical intervention. While this niche observation might seem detached from everyday life, it could have useful applications for exploring hard-to-reach areas such as pipes, caves, and even space. 'When we first saw it happening, we were frankly in disbelief,' Sushanta Mitra, executive director of the Waterloo Institute for Nanotechnology, said in a university statement. The researchers describe their discovery as a challenge to 'our basic understanding of physics.' They 'double-checked everything because it seemed to defy common sense. There was excitement in the lab when we confirmed it wasn't a fluke and that this was real vertical rolling.' Mitra and his colleagues unexpectedly caught the vertical rolling with high-speed cameras, and explained their discovery in a study published in April in the journal Soft Matter. In their experiment, the vertical rolling depended on a precise balance of softness—scientifically defined as elasticity—between a small sphere and a vertical cellphone-sized surface. When the spheres were too solid, they simply fell directly to the ground. On the other hand, when they were too soft, they either slid down without rolling, or stuck to the plane. But a sphere about as soft as a gummy bear spontaneously rolled down a vertical surface equivalent to a spongy mouse pad at a speed of about 0.039 inches (one millimeter) every two seconds, as described in the statement. 'The key is that as it rolls, the sphere slightly changes shape at the contact point,' Mitra explained. 'The front edge acts as a closing zipper, while the back edge acts like opening it. This asymmetry creates just enough torque, or grip, to maintain rolling without either sticking or completely falling off.' The team's findings could have practical implications for the creation of soft robots that can scale vertical walls to explore or monitor inaccessible infrastructure and natural environments both on and off Earth. 'This opens up a whole new way of thinking about movement on vertical surfaces,' Mitra continued. 'Currently, robots and vehicles are limited to horizontal or slightly inclined surfaces. This discovery could change that.'


CNN
2 days ago
- CNN
An exoplanet called K2-18b is highlighting the complexities of finding life beyond Earth
A tiny sign revealed in April seemed like it might change the universe as we know it. Astronomers had detected just a hint, a glimmer of two molecules swirling in the atmosphere of a distant planet called K2-18b — molecules that on Earth are produced only by living things. It was a tantalizing prospect: the most promising evidence yet of an extraterrestrial biosignature, or traces of life linked to biological activity. But only weeks later, new findings suggest the search must continue. 'It was exciting, but it immediately raised several red flags because that claim of a potential biosignature would be historic, but also the significance or the strength of the statistical evidence seemed to be too high for the data,' said Dr. Luis Welbanks, a postdoctoral research scholar at Arizona State University's School of Earth and Space Exploration. While the molecules identified on K2-18b by the April study — dimethyl sulfide, or DMS, and dimethyl disulfide, or DMDS — are associated largely with microbial organisms on our planet, scientists point out that the compounds can also form without the presence of life. Now, three teams of astronomers not involved with the research, including Welbanks, have assessed the models and data used in the original biosignature discovery and got very different results, which they have submitted for peer review. Meanwhile, the lead author of the April study, Nikku Madhusudhan, and his colleagues have conducted additional research that they say reinforces their previous finding about the planet. And it's likely that additional observations and research from multiple groups of scientists are on the horizon. The succession of research papers revolving around K2-18b offers a glimpse of the scientific process unfolding in real time. It's a window into the complexities and nuances of how researchers search for evidence of life beyond Earth — and shows why the burden of proof is so high and difficult to reach. Located 124 light-years from Earth, K2-18b is generally considered a worthy target to scour for signs of life. It is thought to be a Hycean world, a planet entirely covered in liquid water with a hydrogen-rich atmosphere, according to previous research led by Madhusudhan, a professor of astrophysics and exoplanetary science at the University of Cambridge's Institute of Astronomy. And as such, K2-18b has rapidly attracted attention as a potentially habitable place beyond our solar system. Convinced of K2-18b's promise, Madhusudhan and his Cambridge colleagues used observations of the planet by the largest space telescope in operation, the James Webb Space Telescope, to study the planet further. But two scientists at the University of Chicago — Dr. Rafael Luque, a postdoctoral scholar in the university's department of astronomy and astrophysics, and Michael Zhang, a 51 Pegasi b / Burbidge postdoctoral fellow — spotted some problems with what they found. After reviewing Madhusudhan and his team's April paper, which followed up on their 2023 research, Luque and Zhang noticed that the Webb data looked 'noisy,' Luque said. Noise, caused by imperfections in the telescope and the rate at which different particles of light reach the telescope, is just one challenge astronomers face when they study distant exoplanets. Noise can distort observations and introduce uncertainties into the data, Zhang said. Trying to detect specific gases in distant exoplanet atmospheres introduces even more uncertainty. The most noticeable features from a gas like dimethyl sulfide stem from a bond of hydrogen and carbon molecules — a connection that can stretch and bend and absorb light at different wavelengths, making it hard to definitively detect one kind of molecule, Zhang said. 'The problem is basically every organic molecule has a carbon-hydrogen bond,' Zhang said. 'There's hundreds of millions of those molecules, and so these features are not unique. If you have perfect data, you can probably distinguish between different molecules. But if you don't have perfect data, a lot of molecules, especially organic molecules, look very similar, especially in the near-infrared.' Delving further into the paper, Luque and Zhang also noticed that the perceived temperature of the planet appeared to increase sharply from a range of about 250 Kelvin to 300 Kelvin (-9.67 F to 80.33 F or -23.15 C to 26.85 C) in research Madhusudhan published in 2023 to 422 Kelvin (299.93 F or 148.85 C) in the April study. Such harsh temperatures could change the way astronomers think about the planet's potential habitability, Zhang said, especially because cooler temperatures persist in the top of the atmosphere — the area that Webb can detect — and the surface or ocean below would likely have even higher temperatures. 'This is just an inference only from the atmosphere, but it would certainly affect how we think about the planet in general,' Luque said. Part of the issue, he said, is that the April analysis didn't include data collected from all three Webb instruments Madhusudhan's team used over the past few years. So Luque, Zhang and their colleagues conducted a study combining all the available data to see whether they could achieve the same results, or even find a higher amount of dimethyl sulfide. They found 'insufficient evidence' of both molecules in the planet's atmosphere. Instead, Luque and Zhang's team spotted other molecules, like ethane, that could fit the same profile. But ethane does not signify life. Arizona State's Welbanks and his colleagues, including Dr. Matt Nixon, a postdoctoral researcher in the department of astronomy at the University of Maryland College Park, also found what they consider a fundamental problem with the April paper on K2-18b. The concern, Welbanks said, was with how Madhusudhan and his team created models to show which molecules might be in the planet's atmosphere. 'Each (molecule) is tested one at a time against the same minimal baseline, meaning every single model has an artificial advantage: It is the only explanation permitted,' Welbanks said. When Welbanks and his team conducted their own analysis, they expanded the model from Madhusudhan's study. '(Madhusudhan and his colleagues) didn't allow for any other chemical species that could potentially be producing these small signals or observations,' Nixon said. 'So the main thing we wanted to do was assess whether other chemical species could provide an adequate fit to the data.' When the model was expanded, the evidence for dimethyl sulfide or dimethyl disulfide 'just disappears,' Welbanks said. Madhusudhan believes the studies that have come out after his April paper are 'very encouraging' and 'enabling a healthy discussion on the interpretation of our data on K2-18b.' He reviewed Luque and Zhang's work and agreed that their findings don't show a 'strong detection for DMS or DMDS.' When Madhusudhan's team published the paper in April, he said the observations reached the three-sigma level of significance, or a 0.3% probability that the detections occurred by chance. For a scientific discovery that is highly unlikely to have occurred by chance, the observations must meet a five-sigma threshold, or below a 0.00006% probability that the observations occurred by chance. Meeting such a threshold will require many steps, Welbanks said, including repeated detections of the same molecule using multiple telescopes and ruling out potential nonbiological sources. While such evidence could be found in our lifetime, it is less likely to be a eureka moment and more a slow build requiring a consensus among astronomers, physicists, biologists and chemists. 'We have never reached that level of evidence in any of our studies,' Madhusudhan wrote in an email. 'We have only found evidence at or below 3-sigma in our two previous studies (Madhusudhan et al. 2023 and 2025). We refer to this as moderate evidence or hints but not a strong detection. I agree with (Luque and Zhang's) claim which is consistent with our study and we have discussed the need for stronger evidence extensively in our study and communications.' In response to the research conducted by Welbanks' team, Madhusudhan and his Cambridge colleagues have authored another manuscript expanding the search on K2-18b to include 650 types of molecules. They have submitted the new analysis for peer review. 'This is the largest search for chemical signatures in an exoplanet to date, using all the available data for K2-18b and searching through 650 molecules,' Madhusudhan said. 'We find that DMS continues to be a promising candidate molecule in this planet, though more observations are required for a firm detection as we have noted in our previous studies.' Welbanks and Nixon were pleased that Madhusudhan and his colleagues addressed the concerns raised but feel that the new paper effectively walks back central claims made in the original April study, Welbanks said. 'The new paper tacitly concedes that the DMS/DMDS detection was not robust, yet still relies on the same flawed statistical framework and a selective reading of its own results,' Welbanks said in an email. 'While the tone is more cautious (sometimes), the methodology continues to obscure the true level of uncertainty. The statistical significance claimed in earlier work was the product of arbitrary modeling decisions that are not acknowledged.' Luque said the Cambridge team's new paper is a step in the right direction because it explores other possible chemical biosignatures. 'But I think it fell short in the scope,' Luque said. 'I think it restricted itself too much into being a rebuttal to the (Welbanks) paper.' Separately, however, the astronomers studying K2-18b agree that pushing forward on researching the exoplanet contributes to the scientific process. 'I think it's just a good, healthy scientific discourse to talk about what is going on with this planet,' Welbanks said. 'Regardless of what any single author group says right now, we don't have a silver bullet. But that is exactly why this is exciting, because we know that we're the closest we have ever been (to finding a biosignature), and I think we may get it within our lifetime, but right now, we're not there. That is not a failure. We're testing bold ideas.'