Two independent teams have transferred quantum information over several kilometers of fiber optic networks. Conceptually, one way of doing teleportation involves three participants: say, Alice, Bob and Charlie. In order for Alice and Bob to exchange cryptographic keys, they have to first establish the capacity for teleportation, with Charlie’s help. First Alice sends a particle …
The GBU-57A/B Massive Ordnance Penetrator (MOP) is a U.S. Air Force, precision-guided, 30,000-pound (14,000 kg) “bunker buster” bomb. This is substantially larger than the deepest penetrating bunker busters previously available, the 5,000-pound (2,300 kg) GBU-28 and GBU-37. In 2012, the Pentagon requested $82 million to develop greater penetration power for the existing weapon. A 2013 …
The GBU-57A/B Massive Ordnance Penetrator (MOP) is a U.S. Air Force, precision-guided, 30,000-pound (14,000 kg) “bunker buster” bomb. This is substantially larger than the deepest penetrating bunker busters previously available, the 5,000-pound (2,300 kg) GBU-28 and GBU-37. In 2012, the Pentagon requested $82 million to develop greater penetration power for the existing weapon. A 2013 …
The government has signaled that Samarco, co-owned by giants Vale and BHP Billiton, is ready to pay 20 billion reais for the collapse of a waste water dam at its iron ore mine in Minas Gerais on November 5. The accident, which unleashed a massive flood of mud into the River Doce, was described as …
The U.S. Air Force Research Laboratory, or AFRL, said it’s on track to demonstrate a working laser weapon on a fighter jet by 2020. “It really is a national tipping point,” said Kelly Hammett, chief engineer for the AFRL’s directed energy directorate. “We see the technology evolving and maturing to the stage where it really …
A new approach that uses light to move mirrors could usher in a new generation of laser technology for a wide range of applications, including remote sensing, self-driving car navigation and 3D biomedical imaging. A team of UC Berkeley engineers led by Connie Chang-Hasnain, a professor of electrical engineering and computer sciences, used a novel …
Among designers of robotic probes to explore the planets, there is certainly no shortage of clever ideas. There are concepts for robots that are propelled by waves in the sea. There are ideas for tumbleweed bots driven by wind, rolling across Antarctica or Mars. Recently a team of engineers at NASA’s Jet Propulsion Laboratory in …
A joint South Korean and American research group has developed a scalable production method for a state of the art alloy for the use in solid state thermoelectric devices. This new alloy is nearly twice as efficient as existing materials and may lead to a new host of applications. Uses include refrigeration, consumer electronics, transportation …
The estimated cost for the UK of building the two large aircraft carriers has almost doubled to more than £6bn. The F-35 programme, meanwhile, has faced serious technical problems and the cost of the aircraft has spiralled to an estimated £70m each. HMS Prince of Wales is the second Queen Elizabeth-class aircraft carrier under construction …