2026-03-29


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  • New power bank restrictions will safeguard international aviation

    Following the improvements agreed today, these devices will now be limited to two per passenger, and passengers will be prohibited from recharging them during flights. Importantly, crew will however be able to continue to carry and use these power banks in line with the operational requirements of the aircraft. The new specifications will address emerging risks and become effective on 27 March 2026.

  • The Age of the Amplifier

    some of AT&T’s most important technological contributions — namely, the vacuum tube, the negative feedback amplifier, the transistor, and the laser — were (in whole or in part) the product of efforts to make new, better amplifiers for boosting electromagnetic signals. Amplifiers played a crucial role in the Bell System, making it possible to (among other things) connect telephones over long distances, but the value of these four amplifiers extended far beyond telephony. The vacuum tube became a crucial building block for electronics in the first half of the 20th century, used in everything from radio to television to the earliest computers. The negative feedback amplifier helped spawn the discipline of control theory, which is used today in the design of virtually every automated machine. The transistor is the foundation of modern digital computing and everything built on top of it. And the laser is used in everything from fiber-optic communications to industrial cutting machines to barcode scanners to printers. It’s worth looking at why AT&T was so motivated to build better and better amplifiers, and why those efforts produced so many transformative inventions.

  • Seattle opens first light rail across floating bridge


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