This article originally appeared on Engadget at https://www.engadget.com/ai/openai-strikes-a-deal-with-the-defense-department-to-deploy-its-ai-models-054441785.html?src=rss
They also needed an alternative to conventional X-rays. In a clinical linac, X-ray photons are produced by dumping high-energy electrons into a bremsstrahlung target, which is made of a material with a high atomic number, like tungsten or copper. The target slows the electrons, converting their kinetic energy into X-ray photons. It’s an inherently inefficient process that wastes most of the beam power as heat and makes it extremely difficult to reach the ultrahigh dose rates required for FLASH. High-energy electrons, by contrast, can be switched on and off within milliseconds. And because they have a charge and can be steered by magnets, electrons can be precisely guided to reach tumors deep within the body. (Researchers are also investigating protons and carbon ions; see the sidebar, “What’s the Best Particle for FLASH Therapy?”)。新收录的资料对此有专业解读
Read more global business storiesThe shadowy world of abandoned oil tankers。新收录的资料是该领域的重要参考
圖像加註文字，研究人員相信夢境可以被引導與塑造他協助打造的「多爾米奧」（Dormio，拉丁語，意思是「我正在睡覺」）裝置會在使用者入睡時監測生理訊號，並在進入「入睡前幻覺狀態」（hypnagogia）——也就是開始浮現強烈影像的時刻——播放語音提示，例如：「記得夢到水」。研究顯示，在接收到提示後，有超過七成受試者 表示夢到了特定內容。，更多细节参见新收录的资料