Photos posted by a Chinese People’s Liberation Army Navy (PLAN) observer show what appears to be an electromagnetic railgun being affixed to a PLAN tank landing ship, the Haiyang Shan . The LST is being used to test the weapon because its tank deck can accommodate the containers for the gun’s control system and power supply, according to comments from a former PLAN officer translated by ” Dafeng Cao ,” the Twitter handle of the anonymous analyst. For nearly a decade, the US Navy’s Office of Naval Research (ONR) and various contractors worked to develop a railgun system for US ships . A prototype weapon was built by BAE Systems. Testing at the US Navy’s Naval Surface Warfare Center in Dahlgren, Virginia was deemed so successful that the Navy was planning to conduct more testing of the gun at sea aboard a Spearhead -class Joint High Speed Vessel (JHSV). The program promised to deliver a gun that could fire projectiles at speeds over Mach 7 with a range exceeding 100 miles. The 23-pound hypervelocity projectile designed for the railgun flying at Mach 7 has 32 megajoules of energy—roughly equivalent to the energy required to accelerate an object weighing 1,000 kilograms (1.1 US tons) to 252 meters per second (566 miles an hour). Read 3 remaining paragraphs | Comments
See the original post:
US dropped ball on Navy railgun development—now China is picking it up
Reader MojoKid writes: AMD continues its attack on the desktop CPU market versus Intel today, with the official launch of the company’s Ryzen Threadripper processors. Threadripper is AMD’s high-end, many-core desktop processor, that leverages the same Zen microarchitecture that debuted with Ryzen 7. The top-end Ryzen Threadripper 1950X is a multi-chip module featuring 16 processor cores (two discrete die), with support for 32 threads. The base frequency for the 1950X is 3.4GHz, with all-core boost clocks of up to 3.7GHz. Four of the cores will regularly boost up to 4GHz, however, and power and temperature permitting, those four cores will reach 4.2GHz when XFR kicks in. The 12-core Threadripper 1920X has very similar clocks and its boost and XFR frequencies are exactly the same. The Threadripper 1920X’s base-clock, however, is 100MHz higher than its big brother, at 3.5GHz. In a litany of benchmarks with multi-threaded workloads, Threadripper 1950X and 1920X high core-counts, in addition to strong SMT scaling, result in the best multi-threaded scores seen from any single CPU to date. Threadripper also offers massive amounts of memory bandwidth and more IO than other Intel processors. Though absolute power consumption is somewhat high, Threadrippers are significantly more efficient than AMD’s previous-generation processors. In lightly-threaded workloads, Threadripper trails Intel’s latest Skylake-X CPUs, however, which translates to lower performance in applications and games that can’t leverage all of Threadripper’s additional compute resources. Threadripper 1950X and 1920X processors are available starting today at $999 and $799, respectively. On a per-core basis, they’re less expensive than Intel Skylake-X and very competitively priced. Read more of this story at Slashdot. 
An anonymous reader shares a report: Google’s YouTube unit says it now reaches 1.5 billion viewers every month — and its users watch more than an hour of mobile videos per day — as it expands its video programming to sell more digital ads. YouTube CEO Susan Wojcicki also wrote that YouTube Red, the company’s foray into original videos, has launched 37 series that have generated “nearly a quarter billion views.” YouTube Red has 12 new projects in the works, she said. Read more of this story at Slashdot. 
After being switched on for the first time last Friday, the UK’s newest fusion reactor has successfully generated a molten mass of electrically-charged gas, or plasma, inside its core. Futurism reports: Called the ST40, the reactor was constructed by Tokamak Energy, one of the leading private fusion energy companies in the world. The company was founded in 2009 with the express purpose of designing and developing small fusion reactors to introduce fusion power into the grid by 2030. Now that the ST40 is running, the company will commission and install the complete set of magnetic coils needed to reach fusion temperatures. The ST40 should be creating a plasma temperature as hot as the center of the Sun — 15 million degrees Celsius (27 million degrees Fahrenheit) — by Autumn 2017. By 2018, the ST40 will produce plasma temperatures of 100 million degrees Celsius (180 million degrees Fahrenheit), another record-breaker for a privately owned and funded fusion reactor. That temperature threshold is important, as it is the minimum temperature for inducing the controlled fusion reaction. Assuming the ST40 succeeds, it will prove that its novel design can produce commercially viable fusion power. Read more of this story at Slashdot. 
An anonymous reader quotes a report from Phys.Org: In a new study published in the journal Science, a pair of researchers at Columbia University and the New York Genome Center (NYGC) show that an algorithm designed for streaming video on a cellphone can unlock DNA’s nearly full storage potential by squeezing more information into its four base nucleotides. They demonstrate that this technology is also extremely reliable. Erlich and his colleague Dina Zielinski, an associate scientist at NYGC, chose six files to encode, or write, into DNA: a full computer operating system, an 1895 French film, “Arrival of a train at La Ciotat, ” a $50 Amazon gift card, a computer virus, a Pioneer plaque and a 1948 study by information theorist Claude Shannon. They compressed the files into a master file, and then split the data into short strings of binary code made up of ones and zeros. Using an erasure-correcting algorithm called fountain codes, they randomly packaged the strings into so-called droplets, and mapped the ones and zeros in each droplet to the four nucleotide bases in DNA: A, G, C and T. The algorithm deleted letter combinations known to create errors, and added a barcode to each droplet to help reassemble the files later. In all, they generated a digital list of 72, 000 DNA strands, each 200 bases long, and sent it in a text file to a San Francisco DNA-synthesis startup, Twist Bioscience, that specializes in turning digital data into biological data. Two weeks later, they received a vial holding a speck of DNA molecules. To retrieve their files, they used modern sequencing technology to read the DNA strands, followed by software to translate the genetic code back into binary. They recovered their files with zero errors, the study reports. The study also notes that “a virtually unlimited number of copies of the files could be created with their coding technique by multiplying their DNA sample through polymerase chain reaction (PCR).” The researchers also “show that their coding strategy packs 215 petabytes of data on a single gram of DNA.” Read more of this story at Slashdot.