麻豆传媒

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Free electron lasers have unique advantages of high power, wide frequency tunablility and et al, however, they face challenge in narrowing the spectral linewidth. Scientists in China proposed and realized the pump-induced stimulated superradiant Smith-Purcell radiation (PIS-SPR) and achieved an ultra-narrow spectral linewidth of 0.3 kHz at ~0.3 THz in a compact device. The mechanism and technique provides a way to further narrow the spectral linewidth of free electron radiation and broaden its applications.

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A first-of-its-kind research expedition to Latham Island has unveiled one of Tanzania鈥檚 most ecologically significant marine ecosystems, with thriving seabird colonies, critically endangered sharks, and climate-resilient coral reefs.

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The increasing contamination of soils by heavy metals, such as copper and lead, poses significant ecological risks. Traditional methods to assess the impact of these pollutants on plants require lengthy cultivation periods and yield uncertain results.

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In research that is the first of its kind and that holds great potential for addressing a nationwide kidney transplantation challenge, UNC Charlotte microeconomist Glenn Dutcher and colleagues have found significant differences in the acceptance rates among clinicians at the same transplant centers, and also among centers.

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Research supports the effectiveness of a kinesiology-based method to treat lower back pain, say study authors working in collaboration with the National Research Council of Italy, and scientists at the Sbarro Health Research Organization under the leadership of its Founder and President, Antonio Giordano, M.D., Ph.D., Professor at Temple University.

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Historical beliefs of mammals鈥� daily activity periods may not hold true 鈥� especially in regions seeing increased human development, according to a global study.

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Researchers from Roswell Park will report their latest findings to colleagues from around the world at the 2025 annual meeting of the American Association for Cancer Research (AACR) in Chicago, Illinois, April 25-30.

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Wound healing has been termed 鈥渁n overlooked burden and a silent epidemic鈥� due to the significant financial strain that it places on healthcare systems, let alone the unquantifiable human cost.

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Monell Center investigators identified that GLP-1R agonists, a class of drugs currently used to treat type-2 diabetes and obesity, as a promising therapeutic for managing the metabolic complications associated with Bardet-Biedl Syndrome (BBS), a rare genetic disorder characterized by early-onset obesity, compulsive eating, and cognitive impairments. They used a genetically engineered mouse model of BBS that displayed the hallmark features of the condition.

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With the assumption that students are going to use artificial intelligence and large language models such as ChatGPT to do their homework, researchers in the Department of Aerospace Engineering in The Grainger College of Engineering, University of Illinois Urbana-Champaign set out to learn how well the free version of ChatGPT would compare with human students in a semester-long undergraduate control systems course.