"The Milky Way is pervaded by a mixture of gas and dust shining at similar frequencies to those of the CMB, and this foreground emission affects the observation of the most ancient cosmic light. Very careful analysis is needed to separate the foreground emission from the cosmic background. Critically, interstellar dust also emits polarized light, thus affecting the CMB polarization as well. ... The BICEP2 team had chosen a field where they believed dust emission would be low, and thus interpreted the signal as likely to be cosmological. However, as soon as Planck’s maps of the polarized emission from Galactic dust were released (PDF), it was clear that this foreground contribution could be much higher than previously expected."
At present BT already covers most of the UK with hybrid Fibre-to-the-Cabinet (FTTC) technology, which delivers download speeds of up to 80Mbps by running a fibre optic cable to a local street cabinet and then using VDSL2 over the remaining copper line from the cabinet to homes. G.fast follows a similar principal, but it brings the fibre optic cable even closer to homes (often by installing smaller remote nodes on telegraph poles) and uses more radio spectrum (17-106MHz) over a shorter remaining run of copper cable (ideally less than 250 metres). The reliance upon copper cable means that the real-world speeds for some, such as those living furthest away from the remote nodes, will probably struggle to match up to BT's claims. Nevertheless many telecoms operators see this as being a more cost effective approach to broadband than deploying a pure fibre optic / Fibre-to-the-Home (FTTH) network.
The researchers grew a sheet of yttrium iron garnet using laser molecular beam epitaxy in a laboratory (abstract). Magnetic substances like iron are known to disrupt graphene's electrical conduction properties, but yttrium iron garnet works well as it is an electric insulator.
When a graphene sheet was placed on top of an atomically smooth sheet of yttrium iron garnet, the graphene borrowed the magnetic properties from the yttrium iron garnet and became magnetized without the need for doping.
But for all its popularity and appeal, the iPad never has quite cleared the bar Jobs set for it, which was to be "far better" at some key tasks than a laptop or a smartphone. The iPad may have been "far better" when it was first released, but smartphones have come a long way. The iPhone 6 and 6 Plus and their Android equivalents are now convenient enough for most mobile computing tasks that there's no need to carry around a tablet as well. That helps explain why iPad sales have plateaued, rather than continuing to ascend to the stratospheric levels of the iPhone. "The iPad remains an impressive machine. But it also remains a luxury item rather than a necessity," concludes Oremus. "Again, by most standards, it is a major success. Just not by the high standards that Jobs himself set for it five years ago."
The impact of the flaw is troubling because BlackPhone attracts what hackers see as high-value victims: those willing to invest AU$765 (£415, $630) in a phone that claims to put security above form and features may well have valuable calls and texts to hide from eavesdroppers.
The group is calling on volunteers to help with the ongoing work, which has been divided into three steps. The first is about collecting "all the factual information," second is to "share that information as widely as possible," and the third step is "to set up an independent, internationally linked, inquiry into all the areas which do not appear to have been investigated properly." Activists point to the muted media coverage given to a recent case in Washington DC in which Michael Centanni, a senior Republican fundraiser, was charged with child sex offences after investigators traced transmissions of child pornography to his computers in his basement. The case was not covered by The Washington Post or the New York Times, and was only picked up by a local NBC affiliate state and The Washington Examiner, a small conservative paper in the city. According to the court filings, Centanni was found in possession of 3,000 images, many apparently filmed in his own bedroom, including one showing a man raping a five-year-old girl who cries "no" and "mommy" while the man says "good baby" and "stop crying," according to one filing.