Internet shutdowns, where governments intentionally disrupt internet access, are becoming increasingly common around the world. These shutdowns can have major economic consequences, both locally and globally. [Read more…] about The Economic Impact of Internet Shutdowns: A Global Perspective
frequency
Sinomach unit produces China’s first products for stainless steel cold rolling mills
Tianjin Electric Research Institute, a subsidiary of Sinomach, has independently developed a high-power three-level AC-DC-AC frequency converter, which passed a test run in the high roller mill modification project of Taiyuan Iron & Steel Group Co (TISCO).
It marks the first application of a domestic medium-voltage frequency conversion system in the Sendzimir mill and fills in the gap in the application of domestic products in high-end stainless cold rolling mills.
The original automation and transmission system of the unit in the TISCO Stainless Steel Cold Rolling Mill was supplied by a foreign producer in 2002. [Read more…] about Sinomach unit produces China’s first products for stainless steel cold rolling mills
NIST unveils tiny new chip for atomic clocks
Physicists at the National Institute of Standards and Technology (NIST) and partners have demonstrated an experimental, next-generation atomic clock – ticking at high “optical” frequencies – that is much smaller than usual, made of just three small chips plus supporting electronics and optics.
As can be seen from the main picture, it’s smaller than a coffee bean.
Described in Optica, the chip-scale clock is based on the vibrations, or “ticks”, of rubidium atoms confined in a tiny glass container, called a vapor cell, on a chip.
Two frequency combs on chips act like gears to link the atoms’ high-frequency optical ticks to a lower, widely used microwave frequency that can be used in applications. [Read more…] about NIST unveils tiny new chip for atomic clocks
Sick launches new compact image-based code reader
Sick has launched a new compact image-based code reader, Lector621, for reliable detection of 1D, 2D, stacked codes, and plain text.
The high-performance DPM – direct part marking – decoder can read laser or dot-peened codes perfectly, even in the case of low contrast levels, contamination, or poor code quality.
This fills a gap in Sick’s existing portfolio of code readers, by providing a compact solution with increased reading distance, resolution, field of vision, and scanning frequency. [Read more…] about Sick launches new compact image-based code reader