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South China Morning Post
18 hours ago
- South China Morning Post
6G expert G.K. Chang counts costs after winning 4-year fight in China Initiative case
On a Friday in March 2021, as Gee-Kung Chang began his day as usual at 5am, there was no hint that his life was about to change forever. Advertisement As the Georgia Institute of Technology chair professor – a pioneer in the networks behind 5G and 6G – prepped for lectures and set up a thesis defence for a PhD student, a thunderous knock at the door shattered the quiet. On the other side were nine US federal agents – seven from the FBI and two from Homeland Security. They stormed in, handcuffed Chang – who was about 74 at the time – and began searching every room, drawer and cupboard in his home in Smyrna, a suburb outside Atlanta. It was not until his first court appearance that Chang learned he had been indicted on 10 felony counts; accused of abusing a research visa programme known as J-1 by bringing Chinese scholars to Georgia Tech and allegedly having them work instead for the Chinese telecoms company ZTE Chang's reputation imploded. Colleagues and friends drifted away. 'I forced myself to stay sharp mentally and physically,' Chang recalled. Advertisement Four years later, the case quietly fell apart. A judge dismissed nine wire fraud charges in 2024 for lack of evidence. The final visa fraud charge was dropped this April, clearing Chang's name.
Yahoo
19 hours ago
- Climate
- Yahoo
Midwest, South, East Seeing Dangerous Heat, But Relief On Way For Some
Tired of the heat? We are, too. But if you're in the South, you're going to want to buckle in for several more days of punishing temperatures. We do have some good news for those of you in the Midwest and Northeast, though. After another spike of summertime heat, a pattern change will usher in a burst of cooler air, setting up a temperature split where the Midwest and Northeast get some much-needed relief while the South continues to swelter. (TRACK THE HEAT: Temperatures | Heat Index) Sizzling South A dome of high pressure will stay parked over the South, sending temperatures soaring to a peak early in the week. Highs in the mid-to-upper 90s will be widespread, with many places forecast to flirt with the century mark. Add in everyone's favorite — humidity — and the feels-like temperatures will be well into the triple digits. Dozens of daily record highs could be approached in the Southeast through midweek, including cities like Savannah, Mobile, Tampa and Orlando. There is some possible light at the end of the tunnel, though. The cooler air bringing some relief to the Midwest and Northeast midweek could eventually sink farther southward, slowly dropping temperatures in the Southeast states late in the week and into next weekend. (MORE: Heat Advisories, Warnings Explained) Relief Ahead For Midwest, Northeast There's no better words to hear when you're heat-weary than 'there's a cooldown ahead.' And for those of you in the Midwest and Northeast, that is the news we have for you. High temperatures in the upper 80s and 90s are expected across the region through the beginning of the week. On Tuesday, the cooler air will begin to creep into parts of the upper Midwest before settling in across the entire region as well as the Northeast by Thursday. Widespread temperatures in the mid to upper 70s will be a welcome reprieve, with some places dropping 10 to 15 degrees in a span of only a few days. (MORE: Why Warm Nighttime Temperatures Are Just As Dangerous) Taking a peek even further into the first week of August, cooler-than-average temperatures are expected to stick around across much of the Great Lakes, Midwest and Northeast. Enjoy those elusive summertime 70s while you can because we still have a chunk of summer heat ahead of us. (MAPS: 10-Day US Forecast Highs and Lows) Caitlin Kaiser graduated from the Georgia Institute of Technology with both an undergraduate and graduate degree in Earth and Atmospheric Sciences before starting her career as a digital meteorologist with Solve the daily Crossword
Associated Press
21-07-2025
- Health
- Associated Press
Study Uncovers How Immune Cells Contribute to Failed Bone Healing After Muscle-Bone Trauma
Using an integrated multi-tissue dataset, researchers identified two myeloid cell populations and marker genes driving immune dysregulation in polytrauma CHENGDU, SICHUAN, CHINA, July 21, 2025 / / -- Gaining insights into the complex pathways and key cell populations involved in immune dysregulation can aid the development of therapeutic approaches to treat polytrauma, which is associated with poor patient outcomes. In a new study, researchers from the USA have utilized advanced genetic analysis tools and techniques to reveal the cellular and molecular processes involved in polytrauma-induced immune dysregulation. Their findings advance our current knowledge on polytrauma and indicate actionable targets to treat immune dysregulation. Polytrauma, which involves multiple serious injuries occurring simultaneously, is associated with complex healing challenges. In such cases, bone regeneration is often compromised, accompanied by widespread immune system dysregulation. These effects may not surface immediately, but they commonly emerge later in recovery, contributing to increased treatment burden and poorer long-term outcomes. While the immune system plays a crucial role in healing, its dysfunction in polytrauma remains poorly understood. Previous studies have explored immune activity either at the injury site or within systemic tissues like blood and bone marrow. However, an integrated analysis of both local and systemic immune responses is essential to fully understand how immune dysregulation impairs recovery. To address this gap, a team of researchers led by Professor Krishnendu Roy, Bruce and Bridgitt Evans Dean of Engineering at Vanderbilt University, conducted a comprehensive study using single-cell RNA sequencing (scRNA-seq). The research team, based at the Wallace H. Coulter Department of Biomedical Engineering at Georgia Institute of Technology, collaborated with Professor Robert Guldberg from the Department of Bioengineering and Knight Campus for Accelerating Scientific Impact at the University of Oregon. This work was supported by a National Institutes of Health grant (R01AR074960). Their findings were published online in Bone Research on 07 July, 2025. 'Previously, our research group had developed a preclinical rat model of polytrauma that could mimic severe musculoskeletal trauma along with the associated local and systemic immune responses. In this study, we utilized cells from the polytrauma rat model and subjected them to scRNA-seq analysis to comprehensively assess the cellular and molecular mechanisms that drive immune dysregulation in polytrauma', says Prof. Roy, sharing further details about the study. The team combined scRNA-seq with differential gene expression (DEG) analysis, gene set enrichment analysis (GSEA), and the CellChat tool to identify the key immune cells involved. Their analysis revealed a prominent role of myeloid cells—a type of white blood cell—in shaping immune responses across the blood, bone marrow, and injured tissue. Building on their previous findings linking systemic immunosuppressive myeloid cells with poor bone healing outcomes, the researchers sub-clustered the blood polytrauma myeloid cells into five distinct groups to identify those expressing immunosuppressive genes such as interleukins-4 (IL-4), IL-13, and IL-10. The clusters expressing these immunosuppressive genes were designated as trauma immunosuppressive myeloid (TIM) cells. Further DEG analysis revealed that TIM cells from polytrauma patients significantly expressed additional immunosuppressive genes, including annexin A1 (Anxa1) and nitric oxide synthase 2 (Nos2). To decipher the pathways used by TIM cells to communicate with other myeloid cells, the team assessed ligand-receptor interactions using CellChat tool. Their analysis revealed that TIM cells were dependent on chemokine pathway involving Ccl6-Ccr1 and immunosuppressive Anxa1-Fpr2 mechanisms to communicate with other cells in polytrauma blood. In the local injury site tissue affected during polytrauma, mono/mac cells demonstrated increased expression of pro-inflammatory genes including secreted phosphoprotein 1 (SPP1), fibronectin 1 (FN1), and Anxa2. Interestingly, the mono/mac cells showed reduced expression of tissue repair genes following polytrauma. By utilizing an integrated all-tissue dataset, the research team further discovered 15 closely connected hub genes which could potentially regulate polytrauma-induced immune dysregulation. The altered communication patterns in polytrauma reveal the critical role of myeloid cell interactions, with TIM cells involved in immune suppression while mono/mac cells drive inflammatory pathways. Future studies can build on our findings to develop targeted strategies to modulate immune responses, reduce complications, and ultimately improve clinical outcomes in patients with polytrauma. Towards that goal, a multi-site clinical study to risk stratify patients with open tibial fractures has been initiated by Prof. Guldberg and colleagues. In summary, this study not only advances our current understanding of complex immune interactions following polytrauma but also provides actionable targets for therapeutic intervention. *** Reference Title of original paper: Single-cell transcriptomic analysis identifies systemic immunosuppressive myeloid cells and local monocytes/macrophages as key regulators in polytrauma-induced immune Dysregulation Journal: Bone Research DOI: 10.1038/s41413-025-00444-x Yini Bao West China School of Stomatology, Sichuan University +86 2885546461 [email protected] Visit us on social media: X Legal Disclaimer: EIN Presswire provides this news content 'as is' without warranty of any kind. We do not accept any responsibility or liability for the accuracy, content, images, videos, licenses, completeness, legality, or reliability of the information contained in this article. If you have any complaints or copyright issues related to this article, kindly contact the author above.
Perth Now
16-07-2025
- Entertainment
- Perth Now
Adorable video shows dolphins helping to clear up plastic
In an incredible display of intelligence, the moment that a pod of dolphins in the Bahamas seemingly helped a woman pick up plastic cups from the ocean has been captured in a TikTok video. The woman is sat on a pier and films the moment that a dolphin retrieves a plastic cup that she accidentally dropped in the sea. 'You guys are so nice . . . thank you. I dropped the cups. He's trying to give it to me' she said as she films a dolphin pick up the cup in its mouth. She reaches to try and grab the plastic cup from its mouth but can't quite reach, so then tries to retrieve the plastic with a net but still can't get it. The dolphin then resurfaces again with the cup in its mouth and comes far enough out of the water for her to grab it. If you'd like to view this content, please adjust your . To find out more about how we use cookies, please see our Cookie Guide. 'Oh thank you . . . you're so sweet' she said after she safely retrieved the plastic cup. The video quickly went viral on TikTok, amassing two million views and was flooded with comments from people who were amazed by the dolphin behaviour. 'He looked so proud of himself when you grabbed it 🥺' one person said. 'Dolphin: 'Ma'am please take your garbage back' 🤣' another commented. The video shows the dolphin picking up the plastic, returning it to the woman, then looking 'proud' afterwards according to one of the comments. Credit: TikTok Dolphins are renowned for their intelligence, so much so that Google are developing an AI model that can communicate with these marine mammals. 'In collaboration with the Georgia Institute of Technology and the nonprofit Wild Dolphin Project, Google has announced progress on what the team has as the first large language model for dolphin vocalizations, called DolphinGemma,' Scientific American announced in March 2025. In Western Australia, there was recently an incredible wildlife spectacle in Koombana Bay involving dolphins, when a pod seemed to guide a young humpback whale that was lost back out to sea. 'The dolphins took over and while playing and interacting with each other they slowly guided their large cousin out of the bay towards the deeper waters of Geographe Bay' The Dolphin Discovery Centre said.
Arab Times
10-07-2025
- Health
- Arab Times
How long should you really take to pee? Experts weigh in
NEW YORK, July 10: Many people don't give much thought to how long they spend in the bathroom, but researchers say there is an optimal duration for a healthy pee — and it's tied to overall health. The magic number? About 21 seconds. According to scientists from the Georgia Institute of Technology, 21 seconds is the ideal length of time for urination. Long enough to hum the chorus of Happy Birthday but not quite long enough for Bohemian Rhapsody. This '21-second rule' comes from the researchers' discovery of the so-called 'Law of Urination.' They investigated how animals of vastly different sizes manage to empty their bladders in roughly the same amount of time. By timing video clips of mammals urinating, they found that animals weighing over three kilograms take about 21 seconds to fully empty their bladders, regardless of size. How does this happen? It's physics. Larger animals have longer and wider urethras. The increased length boosts gravitational pressure to push urine out faster, while the wider diameter reduces resistance. This means even an elephant, with a bladder many times larger than a dog's, finishes peeing in about the same time. Humans follow this pattern too. Most adults take roughly 20 to 25 seconds to urinate at a relaxed pace, making the 21-second mark a useful, though flexible, benchmark. While you don't need to time yourself on the toilet, sudden or consistent changes in how long you take to pee can signal health issues. Very short durations combined with frequent urges might indicate an overactive bladder or other urinary problems. On the other hand, much longer times could suggest urinary retention, prostate enlargement in men, or nerve issues. Experts also warn against holding urine for too long, as this can overstretch the bladder over time and increase the risk of infections and other complications. Though 21 seconds isn't a strict rule for everyone, paying attention to your usual bathroom habits can help detect early signs of health problems. So next time nature calls, consider whether your visit fits the healthy 21-second window.
