WASHINGTON — The U.S. Air Force successfully flight-tested a hypersonic weapon from a B-52 Stratofortress bomber, defense giant Lockheed Martin announced Monday. A hypersonic weapon is a missile that travels at Mach 5 or higher, which is at least five times faster than the speed of sound. Chinese missile force puts new Russian S-400 air defence system to the test. PLA Rocket Force reportedly shot down a ‘simulated ballistic target’ almost 250km (155 miles) away and moving at 3km (1.9 miles) per second. It was the first time China has tested the system bought under a US$3 billion contract.
Description: Technology and Culture is the quarterly interdisciplinary journal of the Society for the History of Technology. The international journal publishes the work of historians, engineers, scientists, museum curators, archivists, sociologists, anthropologists, and others, on topics ranging from agriculture to zippers.
Technology and Culture regularly includes scholarly articles, book reviews, museum exhibit reviews, and critical essays. The society's Current Bibliography in the History of Technology also appears under the banner of Technology and Culture. The 'moving wall' represents the time period between the last issueavailable in JSTOR and the most recently published issue of a journal.Moving walls are generally represented in years. In rare instances, apublisher has elected to have a 'zero' moving wall, so their currentissues are available in JSTOR shortly after publication.Note: In calculating the moving wall, the current year is not counted.For example, if the current year is 2008 and a journal has a 5 yearmoving wall, articles from the year 2002 are available. Terms Related to the Moving Wall Fixed walls: Journals with no new volumes being added to the archive. Absorbed: Journals that are combined with another title. Complete: Journals that are no longer published or that have beencombined with another title.