Bruce Shelley with HEA: “We want to let our members know that the best thing that they can do when they receive a phone call like this, that is suspicious, is hang up and call directly back to Homer Electric. That is your best course of action to make sure it is a valid call from the utility.” According to a release from HEA, there has been a recent report of an individual, posing as an HEA representative, confronting local businesses in person and threatening to disconnect their power if payment is not made immediately. Facebook0TwitterEmailPrintFriendly分享Homer Electric Association, Inc. is getting reports again from area businesses regarding suspicious HEA impersonators over the phone – as well as in person. The goal of the scammers is to obtain credit card numbers or other financial information and payment.If a suspicious phone call is received, end the phone call and contact HEA for verification and to checkthe status of your account. In addition, business members have received phone calls from fraudulent callers impersonating a utilityrepresentative and requesting payment for the customer’s supposed past due bill. The fraudulent callerthreatens immediate disconnection of electric service if the bill is not paid. If you have questions or need additional information, call 1-800-478-8551.
Listen: Charli XCX Releases New Track “5 In The Morning” Wake Up With Charli XCX At “5 In The Morning” listen-charli-xcx-releases-new-track-5-morning News Twitter Facebook Email The British singer/songwriter unveils her latest single after revealing she’s got “a lot” of new music on the horizonRenée FabianGRAMMYs May 31, 2018 – 12:30 pm Currently in the midst of a huge tour as an opening act for Taylor Swift’s top-selling Reputation tour, it seems Charli XCX has also carved out some time for her own music.On May 31, the British singer/songwriter released a new single, “5 In The Morning.” It arrived just hours after Charli XCX teased she is “going to release a lot music this year,” so much so we’re “gonna be so f***ing sick of” her. Somehow we doubt it.The track, which Billboard calls a “flashy banger,” has a hip-hop vibe with an empowering message for all those who are “busy ballin'”: “I’m goin’ all in/ It’s 5 in the mornin’, I’m busy ballin’/I ain’t even stoppin’/It’s 5 in the mornin’, I’m so devoted.”While we wait for what else Charli XCX has in store, you can likely catch some of her new music if you head out to see her on tour.Catching Up On Music News Powered By The Recording Academy Just Got Easier. Have A Google Home Device? “Talk To GRAMMYs”
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. A research group in the UK has crafted a source of single photons – photons emitted one by one – with a convenience and ease of use they liken to “plug and play” computer hardware devices. This is a key step forward in single-photon production, which is essential to successful, secure quantum communication, the transmission of data using individual photons to carry bits of information. Quantum sensor breakthrough using naturally occurring vibrations in artificial atoms Citation: ‘Plug and Play’ Source of Single Photons (2007, March 15) retrieved 18 August 2019 from https://phys.org/news/2007-03-source-photons.html A sketch of the single-photon source with the integrated optical-fiber bundle. The quantum-dot wafer is mounted onto the sample holder (right inset) with the fiber bundle attached directly to its top surface. The “WDM” is the beamsplitter. Explore further The device’s plug-and-play quality lies in its novel design. A bundle of optical fibers is coupled with – or “plugged into,” so to speak – a wafer patterned with quantum dots. Quantum dots are tiny atom clusters of a semiconducting material, such as silicon, that contain as few as a hundred atoms and play a key role in many single-photon-production schemes. In this case, they emit photons when excited with laser light.“Pairing the optical fiber bundle and the quantum-dot wafer presents a way to implement real quantum communication that other single-photon sources do not have,” said lead researcher Xuilai Xu, a scientist at Hitachi Europe Ltd. in Cambridge, to PhysOrg.com. Xu and his colleagues at Hitachi performed the study in collaboration with researchers at the University of Cambridge.The wafer is mounted onto a sample holder, immersed in liquid helium, and then excited with a laser. During this process, the dots’ atoms absorb the laser photons and jump to a higher energy state, but almost instantly re-emit the photons and return to a lower-energy state. The emitted photons travel through the fiber bundle to a beamsplitter, which sends the emitted photons out one fiber and the residual laser photons out another.Accurately determining if the source produced single photons was a tricky task. Xu and his colleagues had to use several devices to analyze the emitted photon signal. These included a spectrometer, which measured the intensity of the light, and two single-photon-counting “photodiodes,” semiconductor devices used to detect light. They also applied a filter to subtract out background photons, ensuring that the photons emitted from the quantum dots were not mixed with photons emitted from the wafer’s “wetting layer,” a thin layer of residue formed on the surface of the dots as the wafer was created.Analysis of the data produced by the measurement and detection devices showed that the photons tended not to be emitted in pairs. And, according to the researchers’ calculations, the addition of the filter, when it was placed at the proper angle, greatly reduced the probability that photon counters would detect more than one photon at once – specifically, the likelihood of this was reduced 100-fold.“This indicates a nearly ideal single-photon source,” said Xu.To test the stability of their design, the group measured the photons emitted from 27 quantum dots, traveling through different optical fibers in the bundle, over a 24-day period. The results showed the photon source to be stable over a timescale of weeks, with no evidence that a considerably longer period would result in degradation.Citation: Xiulai Xu, Ian Toft, Richard T. Phillips, Jonathan Mar, Kiyotaka Hammura, and David A. Williams, “’Plug and play’ single-photon sources.” Appl. Phys. Lett. 90 061103 (2007)Copyright 2007 PhysOrg.com. All rights reserved. This material may not be published, broadcast, rewritten or redistributed in whole or part without the express written permission of PhysOrg.com.