1 As England’s Group B match with Wales at Euro 2016 kicked off in Lens, supporters back home were hailing Joe Hart for his passion.The Manchester City goalkeeper was seen rallying his troops in the tunnel before captain Wayne Rooney led the team out onto the pitch.And once on the field, Hart belted out a stirring rendition of God Save The Queen before kick off.You can see what supporters said about Hart on Twitter below… England stars Joe Hart and Wayne Rooney
Cristiano Ronaldo Ronaldo is the best player in history, Zidane agrees Ryan Benson Last updated 1 year ago 22:55 12/8/17 FacebookTwitterRedditcopy Comments(9) Getty Images Cristiano Ronaldo Real Madrid Zinédine Zidane Real Madrid v Sevilla Sevilla Primera División The Portuguese proclaimed himself the greatest exponent of the game ever – and his coach is not about to disagree Zinedine Zidane agrees with Cristiano Ronaldo’s bold claim that he is the “best player in history” following the Real Madrid star’s record-equalling fifth Ballon d’Or triumph on Thursday.Ronaldo beat Lionel Messi and Neymar to the prestigious individual gong, moving level on five with his Argentinian rival.And the Portugal international came out with the assertion that his victory makes him the best footballer in history, claiming that there is nobody who can do what he does. Article continues below Editors’ Picks Lyon treble & England heartbreak: The full story behind Lucy Bronze’s dramatic 2019 Liverpool v Man City is now the league’s biggest rivalry and the bitterness is growing Megan Rapinoe: Born & brilliant in the U.S.A. A Liverpool legend in the making: Behind Virgil van Dijk’s remarkable rise to world’s best player When asked if he agreed, Zidane said: “Yes. There are lots of players who have been very successful in this club, but no one has achieved what he has, and what he’s still going to achieve.”I think he’s the best player in the world. It’s easy to praise Ronaldo, though there’s little more that can be said.”You can see what he contributes to game every time he pays – he’s phenomenal.“Just the other day I was chatting with a few people and said that a player who plays 15 years here will not achieve what Ronaldo has.”He’s made history here and will hopefully stay until he decides to hang up his boots.”Ronaldo often finds himself the subject of speculation that he is not happy in Madrid and is angling for a move away, but Zidane insists such stories are pure fiction.”He will always be here,” Zidane said. “There’s always that same debate with Ronaldo, if he’s happy or not.”People just want to ruffle his feathers, upset Real Madrid and those working here. He’s happy here, playing for the best club in the word.”There’s no debate, he came out and said so himself. We shouldn’t read too much into anything else now.”
The state of Florida will purchase the development rights for a 5.85-acre parcel west of Naval Station Mayport to protect the installation from incompatible development.The state will pay $630,000 for the parcel along the St. Johns River and acquire the development rights from the Jacksonville Port Authority. The deal does not prohibit residential or commercial development, reported News4Jax.“There are height restrictions, there are lighting restrictions,” said Rocky McPherson, vice president of military and defense programs at Enterprise Florida. “They can build things that are compatible with the Navy’s use of that base.”The purchase comes as the state works to ensure its military installations are well positioned in a future BRAC round.“We don’t know what is going to happen in ’17. That’s really speculative,” McPherson said. “But we don’t want to have a development that’s impinging upon the ability of the base to do its mission. And then when people start looking at bases and say, ‘that’s a problem,’ we want to avoid that.”The funds for the transaction come from a nearly $7.5 million fund the state Legislature added to the budget in 2014 for non-conservation purchases outside military bases. The state currently is negotiating the purchase of land or development rights for parcels adjacent to MacDill Air Force Base and Naval Support Activity Panama City, according to the story.The state has identified an additional 64 sites neighboring bases that could eventually be targeted in similar deals. Dan Cohen AUTHOR
The schematic of the problem. A dimer of separated nanospheres where the surface charge smearing is described by an effective cover layer of (A) a constant thickness Δd’, (B) a constant permittivity, εS =1 (shifting the metal boundary by Δd’), or (C) a variable thickness Δd’ and spatially dependent permittivity. Under an inverse transformation, the asymmetric core-shell structure in C can be mapped to a dielectric annulus (shown in D) defined by a dielectric-coated metal sphere and a dielectric-coated hollow sphere. Credit: Luo Y, Zhao R, Pendry JB (2014) van der Waals interactions at the nanoscale: The effects of nonlocality. Proc Natl Acad Sci USA 111(52):18422-18427. · the fact that the forces depend on contributions from many different frequencies over a range of almost 100eVPendry notes that researchers are only now beginning to explore the consequences of nonlocality in nanoscale surface phenomena, and are in the process of building reliable models. “The nanoscale forces in our paper are just one instance of where it’s important to treat nonlocality, where the main complication is that the response of a system at a given point depends not just on the electromagnetic fields at that point, but on the fields in the surrounding region as well – a problem that many traditional approaches fail to address.”In their paper, the scientists found that nonlocality dramatically weakens the field enhancement between the spheres, and thereby the van der Waals interaction. “van der Waals forces – although long range relative to standard chemical bonds – are only significant when surfaces are quite close to one another,” Pendry explains. “The standard local theory predicts infinite force in the limit that surfaces touch – but of course this is nonsense. Therefore, predictions that make sense and can be compared to experiments need to take nonlocality into account.”Relatedly, the paper states that chemical bonding – while not an explicit concern in this study – will dominate the final approach just before the surfaces touch at a few tenths of a nanometer, at which point direct contact of the charges will come into play through electron tunneling. “The forces we consider are complementary to chemical bonding,” Pendry clarifies, “in that the current theoretical approach to chemical bonds exploits the local density approximation. In other words, just as a study of pure van der Waals forces omits chemical bonding, so a pure local density study of bonds has nothing to say about the longer range dispersion forces that we calculate. Of course, at some stage the two have to come together…but for that to happen we need experimental input – and theoretical studies of the van der Waals forces are the first steps in making this happen.”The approach described in the paper makes analytical investigation of 3D nonlocal problems feasible while providing insight into the understanding of nonlocal effects in plasmonic nanostructures. “Calculations are always difficult when treating singular structures – by which we mean situations such as the nearly touching spheres considered in our paper – but also the interaction of needle-sharp points with surfaces,” Pendry explains. “Using transformations to unravel the singularity reveals how the forces work in each of these situations, and in fact often enables us to show a common origin.” For example, regarding how their results might influence the development of functional subnanometer substrates, he adds that “any nanomechanical system must consider the effects of van der Waals forces – and our paper is an attempt to further our understanding of these problems.”Looking ahead, Pendry tells Phys.org that van der Waals forces are just the first step in a series of investigations the scientists have already planned. “On the near horizon is heat transfer between surfaces that are close but not in physical contact: Electromagnetic fluctuations responsible for the van der Waals force also enable heat to leap across the gap – an effect different from, and much stronger than, radiative cooling.” (Radiative cooling is the process by which a body loses heat by thermal radiation.) “In the longer term, we’ll try to generalize our theory of quantum friction, whereby surfaces which are close but not in physical contact can experience frictional drag. Nonlocality is also an important issue in the effects.”In closing, Pendry notes that several other areas of research might benefit from their study, given that transformation optics is a very general technique in electromagnetic theory. “The present study is just one in a whole series of applications. We’ve already seen many studies of its application to invisibility, and we have used it extensively to study intense field enhancements in plasmonic structures, such as surface enhanced Raman spectroscopy. In fact, virtually any problem that has electromagnetic radiation interacting with a physical structure could potentially benefit from transformation optics – and in the case of plasmonic systems, nonlocality will always be an important issue whenever surface in close proximity are considered.” Citation: Nanoscale neighbors: First use of transformation optics to accurately analyze nonlocality in 3D plasmonic systems (2015, January 2) retrieved 18 August 2019 from https://phys.org/news/2015-01-nanoscale-neighbors-optics-accurately-nonlocality.html Explore further · the problem involved several length scales, meaning that they had to take into account the spheres themselves (~10nm) as well as the spacing between them, which they tried to push to the limit of one atomic spacing (~0.2nm) (Phys.org) —The ubiquitous van der Waals interaction – a consequence of quantum charge fluctuations – includes intermolecular forces such as attraction and repulsion between atoms, molecules and surfaces. The most long-range force acting between particles, it influences a range of phenomena including surface adhesion, friction and colloid stability. Typically a simple task when parallel surfaces are further apart than 10 nanometers, calculating van der Waals forces between, for example, a pair of nanospheres less than five nanometers apart becomes quite difficult. Moreover, the latter scale requires that the effect of nonlocality (the direct interaction of two objects that are separated in space with no perceivable intermediate agency or mechanism) be considered, introducing complexity into, and thereby further hampering, analysis. More information: van der Waals interactions at the nanoscale: The effects of nonlocality, Proceedings of the National Academy of Sciences, published online before print December 2, 2014, doi:10.1073/pnas.1420551111 Van der Waals force re-measured: Physicists verify nonlinear increase with growing molecular size The absorption spectrum for a dimer of spherical particles. The contour plot of the absorption cross section vs. the frequency and the separation for a pair of gold nanospheres with equal radii of (A) 5 and (B) 30 nm. Comparison of our analytical calculations with local and nonlocal numerical simulations for two closely separated (δ =0:2 nm) gold spheres with equal radii of (C) 5 and (D) 30 nm. Credit: Luo Y, Zhao R, Pendry JB (2014) van der Waals interactions at the nanoscale: The effects of nonlocality. Proc Natl Acad Sci USA 111(52):18422-18427. Journal information: Proceedings of the National Academy of Sciences © 2015 Phys.org Recently, however, scientists at Imperial College London, London proposed a simple analytic solution, showing – for the first time, the researchers say –that nonlocality in 3D plasmonic systems can be accurately analyzed using transformation optics. (Plasmons are quasiparticles arising from the quantization of plasma oscillations at optical frequencies; by arranging electromagnetic fields in a specific way, transformation optics determines the direction in which electromagnetic radiation will propagate.) The scientists also suggest that their results increase the underlying understanding of nonlocal effects in plasmonic nanostructures.Prof. Sir John Pendry discussed the paper that he, Dr. Yu Luo and Dr. Rongkuo Zhao published in the Proceedings of the National Academy of Sciences. “Nonlocality introduces computational complexity which makes doing the calculations difficult,” Pendry tells Phys.org. “We’ve found a workaround that greatly simplifies the calculations by replacing the nonlocal system with a local system that reproduces the results to a high degree of accuracy.” Specifically, the scientists showed that nonlocality in 3D plasmonic systems can be accurately analyzed using the transformation optics approach – the first time that the technique has been applied to van der Waals forces – which they applied to solve the problem of including nonlocal effects when two nanoscale bodies interact. “The key to successfully exploiting transformation optics,” Pendry points out, “is to choose the right transformation. In our case we were able to transform the problem of two nearly-touching spheres into the much more symmetric problem of two concentric spheres.” In so doing, the researchers had to address two challenges: This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.
This story originally appeared on PCMag This hands-on workshop will give you the tools to authentically connect with an increasingly skeptical online audience. Free Workshop | August 28: Get Better Engagement and Build Trust With Customers Now 2 min read Huawei is not getting any love from the Trump administration. FCC Chairman Ajit Pai on Monday proposed eliminating a government subsidy for any U.S. telecom carrier that buys from the Chinese company.The subsidies draw from the Universal Service Fund, an $8.5 billion FCC fund designed to connect low-income areas, schools and libraries to the internet. Pai’s proposal seeks to bar the money from going to equipment suppliers declared a “national security threat.”The chairman’s proposal doesn’t identify Huawei by name. But in a blog post, Pai referenced growing Congressional concerns over “certain Chinese communication equipment providers” posing a national security risk to the U.S.”Hidden ‘back doors’ to our networks in routers, switches — and virtually any other type of telecommunications equipment — can provide an avenue for hostile governments to inject viruses, launch denial-of-service attacks, steal data, and more,” Pai said in a separate statement.In December, 18 lawmakers also sent a letter to the FCC chairman, which raised concerns about “Chinese espionage in general and Huawei’s role in that espionage in particular.”Last week, Pai responded to the lawmakers, saying he shared their concerns. “I intend to take proactive steps to help ensure the integrity of the communications supply chain,” he wrote.Pai’s proposal, which goes up for vote next month, risks limiting U.S. business for both Huawei and another Chinese supplier, ZTE. In addition to selling smartphones, the two companies also develop equipment that can power cellular networks.However, U.S. officials worry that same technology can be used for state-sponsored spying. In 2012, a Congressional committee declared both Huawei and ZTE a security threat over their suspected ties to the Chinese government.Both Huawei and ZTE reject the spying allegations; neither have responded to Pai’s announcement.The proposal comes as AT&T, Verizon and Best Buy have all reportedly stopped selling Huawei phones. In its defense, Huawei has said its phones have been built with the best security practices in mind and use Google’s Android OS. March 27, 2018 Enroll Now for Free