アルミホイルなど身近な家庭用品を使って、シンプルな無線送受信機を組み立てる実践的なプロジェクトが公開されました。
このガイドでは、カーラジオや携帯電話の基地局から、GPS、Wi-Fi、Bluetooth接続に至るまで、電波が現代のテクノロジーにおいて依然として中心的な役割を担っていることを説明しています。また、テレビや現代のワイヤレスサービスも同じ電波に依存していることから、いわゆる「ラジオの黄金時代」は1950年代に終わったわけではないと指摘しています。
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Physicists at MIT have developed a new microscope using terahertz light to directly observe hidden quantum vibrations inside a superconducting material for the first time. The device compresses terahertz light to overcome its wavelength limitations, revealing frictionless electron flows in BSCCO. This breakthrough could advance understanding of superconductivity and terahertz-based communications.
Researchers at the SETI Institute suggest that solar wind and plasma from stars could distort radio signals from distant intelligent life, making them harder to detect. This means past searches may have overlooked potential evidence by focusing on narrowband signals. Adjusting detection methods could improve future chances of discovery.
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A team from Xidian University has developed a car-mounted microwave wireless power system that kept fixed-wing drones airborne for up to 3.1 hours. The system uses GPS positioning, dynamic tracking, and onboard flight controls to maintain alignment between the emitter and drone during flight. The findings were published on March 25 in the peer-reviewed journal Aeronautical Science & Technology.
Physicists at New York University have developed a new type of time crystal using sound waves to suspend tiny styrofoam beads, resulting in nonreciprocal interactions that defy Newton's third law of motion. The compact, visible system oscillates in a steady rhythm and was detailed in Physical Review Letters. Researchers suggest potential applications in quantum computing and insights into biological rhythms.
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Scientists have developed a light-based sensor that can identify tiny amounts of cancer biomarkers in blood samples, potentially enabling earlier detection than traditional scans. The technology combines DNA nanostructures, CRISPR, and quantum dots to produce a clear signal from just a few molecules. Tests on lung cancer patient serum showed promising results at sub-attomolar levels.
Physicists at MIT have developed a theoretical technique inspired by the film Interstellar to send messages backwards in time using quantum entanglement. The approach mimics closed time-like curves and surprisingly improves communication through noisy channels. While actual time travel remains impossible, the idea could enhance conventional systems.