editor's blog
Subscribe Now

Four weeks of argument over a second

Today (November 2nd) the International Telecommunication Union’s World Radiocommunication Conference meets in Geneva. It will run until the 27th and, apparently, during much of that time, there will be bitter arguments about the leap second. As we discussed in Just a Second https://www.eejournal.com/archives/articles/20150924-justasecond/ a few weeks ago, now that we measure the second using atomic frequencies, it is clear that the earth doesn’t rotate evenly, so, at relatively unpredictable times, a leap second is declared. This requires the administrators of a range of systems to tell the system to add the extra second. The first time a leap second was declared, there were serious problems. Supporters of the leap second claim that the problem is well understood and manageable, but opponents argue that now we don’t rely on the sun and stars for navigation, and use artificial satellites and the internet to share time signals, there is no need to take any risks. The arguments are summarised in IEEE Spectrum.  http://spectrum.ieee.org/tech-talk/computing/networks/leap-second-heads-into-fierce-debate

Leave a Reply

featured blogs
Jan 24, 2020
Someone has created a song by taking Pi, assigning each number to a note, and adding harmonies. The result is strangely captivating....
Jan 24, 2020
[From the last episode: We looked at the different ways memory can be organized in different kinds of systems.] Let'€™s look at a scenario: you run a restaurant, but you'€™re short on funds to hire people. So you'€™re your own chief cook and bottle-washer. You do everyt...
Jan 23, 2020
Embedded design trends typically revolve around three main ideas: faster data rates, smaller form factors and cost-effective solutions. Those design trends drive the theme for the 2020 Embedded Tech Trends forum: The Business and Technology Forum for Critical and Intelligent ...
Jan 22, 2020
Master the design and verification of next gen transport: Part One – Overview Master the design and verification of next gen transport: Part Two – High-Level Synthesis Master the design and verification of next gen transport: Part Three – Functional Safety M...

Featured Video

Automotive Trends Driving New SoC Architectures -- Synopsys

Sponsored by Synopsys

Today’s automotive trends are driving new design requirements for automotive SoCs targeting ADAS, gateways, connected cars and infotainment. Find out why it is essential to use pre-designed, pre-verified, reusable automotive-optimized IP to meet such new requirements and accelerate design time.

Drive Your Next Design to Completion Today with DesignWare IP® for Automotive SoCs