Researchers demonstrate Heisenberg uncertainty principle at macro level

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first_img © 2013 Phys.org (Phys.org)—Physicists working at the University of Colorado have succeeded in demonstrating one of the major tenets of quantum mechanics—namely the Heisenberg uncertainty principle—at the macro level. In their paper published in the journal Science, the team describes how a small but still visible drum they built in their lab, outfitted with mirrors, a laser and a detector, demonstrated that it was not possible to measure a photon’s position and momentum simultaneously. It was Heisenberg who famously noted that it was impossible to measure the momentum of an object and its position at the same time. As an example, he pointed out that using a microscope to look at a single electron, would require shining light on it. Those photons would cause the electron to move slightly, changing its momentum. Up till now, researchers testing or demonstrating this principle have worked at the micro level because attempting to do so with objects large enough to be seen with the naked eye seemed impossible due to the many variables at play. In this new research, the team in Colorado showed that this not necessarily the case.They started by building a square drum frame out of silicon, with each side 0.5 millimeters long. They then stretched a thin film of silicon nitride over the skin to create the drum head. The drum was placed in a vacuum between two very tiny mirrors and was chilled to just 4 degrees above absolute zero to eliminate extraneous noise. The experiment was conducted by shooting a laser at the drum and measuring how much the head was distended by the photons striking it as they were bounced back and forth between the mirrors. As more photons struck the drum, greater fluctuations occurred in the measurements recorded, distorting the readings, and proving that the Heisenberg uncertainty principle can indeed be demonstrated with objects large enough to be seen with the naked eye.The results of the experiment could also have an impact elsewhere, as researchers in Washington and Louisiana are planning a similar experiment over a much more vast scale—they will be seeking to measure gravitationally waves, which the theory of relatively says, should cause a change in distance between two objects. Their experiment will involve the use mirrors as well, but instead of a small drum, they will be trying to measure what happens when two black holes merge. Journal information: Science More information: Science. Vol 339, February 13, 2013, p. 801. doi: 10.1126/science.1231282 Are you certain, Mr. Heisenberg? New measurements deepen understanding of quantum uncertainty 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. Citation: Researchers demonstrate Heisenberg uncertainty principle at macro level (2013, February 15) retrieved 18 August 2019 from https://phys.org/news/2013-02-heisenberg-uncertainty-principle-macro.html Explore furtherlast_img

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EU Parliament supports Snowden

first_imgGood news is hard to find, especially since the U.S. capitalist media try to bury a lot of it. Here’s a recent example:The European Parliament, a body that is directly elected by the people of all 28 European Union member states and is more reflective of their opinions than many governments, voted on Oct. 29 that each EU country should “drop any criminal charges against Edward Snowden, grant him protection and consequently prevent extradition or rendition by third parties, in recognition of his status as whistleblower and international human rights defender.” (theguardian.com, Oct. 29)While not directly enforceable, the resolution expresses the anger of many in Europe against the worldwide electronic “surveillance” campaign conducted by the National Security Agency, a massive U.S. spying organization. And it expresses the strong popular support for heroic whistleblowers like Snowden and Chelsea Manning, who have faced exile or imprisonment for exposing U.S. crimes, both here and abroad.This vote reveals how unpopular U.S. imperialism and its political leaders have become, even in so-called allied countries.The response by the U.S. government was not surprising. “Our position has not changed,” Ned Price, spokesperson for the National Security Council, said in a statement emailed to the Guardian. “Mr. Snowden is accused of leaking classified information and faces felony charges here in the United States. As such, he should be returned to the U.S. as soon as possible, where he will be accorded full due process.”The “due process” that Price is talking about is prosecution under the draconian Espionage Act of 1917, which would even forbid Snowden from arguing in his defense that his disclosures benefited the public.That same law was used to jail courageous unionist and socialist Eugene Debs for years because he spoke out against U.S. entry into World War I. Later, it was used to execute both Julius and Ethel Rosenberg on falsified Cold War espionage charges. It was used to sentence Chelsea Manning to prison for decades for exposing U.S. war crimes in Iraq.This law is not justice. It is simply a grotesque blueprint for retribution against those with the courage to expose the atrocities of imperialism. Stop the persecution of Edward Snowden! Free Chelsea Manning!FacebookTwitterWhatsAppEmailPrintMoreShare thisFacebookTwitterWhatsAppEmailPrintMoreShare thislast_img

Internet increasingly resembles an Intranet as foreign services blocked

first_img Receive email alerts Reporters Without Borders said the Burmese Internet increasingly resembles an Intranet as more and more foreign electronic services have been cut.Email providers Gmail, as well as Internet telephone services Gtalk and Skype, have been blocked in Burma since the end of June. It appears however that the blocking of this Internet services is not absolutely constant and that Internet-users can occasionally access them.”The decision to ban Gtalk and Skype were taken partly for financial reasons. Voice over Internet Protocol (VoIP) services were breaking into the profitable long-distance telephone call market, in which the state has a monopoly,” said the press freedom organisation.”But it is also since, like webmails, this type of communication is very difficult to monitor. The Burmese Internet is more controlled than the Net in China,” it added.The authorities, who already block access to Yahoo! and Microsoft (Hotmail) email services, want to force Burmese Internet-users to use Mail4U from Myanmar Teleport (formerly Bagan Cybertech), a state enterprise which filters and controls email content. July 4, 2006 – Updated on January 20, 2016 Internet increasingly resembles an Intranet as foreign services blocked Reporters Without Borders said the Burmese Internet increasingly resembles an Intranet as more and more foreign electronic services have been cut. Email providers Gmail, as well as Internet telephone services Gtalk and Skype, have been blocked in Burma since the end of June. At the end of May, as Aung San Suu Kyi’s house arrest was being extended, the Internet was completely cut off in Burma. All that was accessible was local sites of Myanmar Wide Web, a national Intranet made up of websites approved by the regime. The Myanmar Posts and Telecom (MPT), one of the departments of the Ministry of Communications, Post and Telegraphs, said the cut was due to technical problems linked to optical cables under the seabed off the coast of Singapore. But, according to a journalist on the Democratic Voice of Burma, the cut was in reality “a ruse” allowing the authorities to upgrade their Internet-filtering programmes.Officially, Burma says it wants to modernise and prioritise new technology but in fact the military junta does its utmost to control information circulating on the Net.Every computer in the country has to be registered with the MPT, with those failing to do so liable to a sentence of up to 15 years in prison. It is the state which licences Internet cafés. They are forced to ask clients to produce proof of identity and to install software which takes screen captures every five minutes. All the data has to be kept on CDs and regularly sent to the authorities.The Burmese authorities have ordered filtering of independent online newspapers, websites defending human rights or promoting democracy and publications supporting the claims of the Karen people (an anti-government ethnic group in the east of the country). Internet users can access these sites and webmail by using proxy servers or tunnelling techniques (See Reporters Without Borders’ Handbook for Bloggers and Cyber-dissidents). The OpenNet Initiative has shown that the junta has, since May 2004, been using Internet filtering software sold by the US firm Fortinet.Finally, the creation of a website has to be approved by the authorities, and under a 2000 law, anyone discussing political issues online or posting articles “likely to damage the interests of the Myanmar Union” or “directly or indirectly harmful to state security policy” is liable to a six-month prison sentence.Reporters Without Borders considers Burma to be one of the 15 “black holes in the Internet”.————-Create your blog with Reporters without borders: www.rsfblog.org RSF asks Germany to let Myanmar journalist Mratt Kyaw Thu apply for asylum Organisation News News Help by sharing this information Follow the news on Myanmar RSF_en center_img May 26, 2021 Find out more to go further May 12, 2021 Find out more MyanmarAsia – Pacific News US journalist held in Yangon prison notorious for torture News Thai premier, UN rapporteurs asked to prevent journalists being returned to Myanmar MyanmarAsia – Pacific May 31, 2021 Find out morelast_img

Hundreds Enjoyed South Pasadena Moon Festival

first_imgCommunity News Hundreds Enjoyed South Pasadena Moon Festival From STAFF REPORTS Published on Wednesday, October 7, 2015 | 10:05 pm First Heatwave Expected Next Week Pasadena’s ‘626 Day’ Aims to Celebrate City, Boost Local Economy Business News Community News Make a comment Your email address will not be published. Required fields are marked * Get our daily Pasadena newspaper in your email box. Free.Get all the latest Pasadena news, more than 10 fresh stories daily, 7 days a week at 7 a.m. HerbeautyRemove Belly Fat Without Going Under The KnifeHerbeautyHerbeautyHerbeauty6 Fashion Trends You Should Never Try And 6 You’ll LoveHerbeautyHerbeautyHerbeautyShort On Time? 10-Minute Workouts Are Just What You NeedHerbeautyHerbeautyHerbeauty8 Yoga Poses To Overcome Stress And AnxietyHerbeautyHerbeautyHerbeautyAt 9 Years Old, This Young Girl Dazzled The World Of FashionHerbeautyHerbeautyHerbeauty11 Signs Your Perfectionism Has Gotten Out Of ControlHerbeautyHerbeauty More Cool Stuff Top of the News center_img Subscribe Name (required)  Mail (required) (not be published)  Website  Multicolored lanterns of all shapes and sizes hung from trees and lamp posts. Brightly colored streamers crisscrossed overhead, and dozens of festive Chinese decorations adorned the walls, inside and out.On Saturday afternoon October 3, the South Pasadena Library Community Room and Library Park were transformed into an authentic Chinese-inspired venue to celebrate the annual mid-autumn festival, the Moon Festival. Several hundred members of the community of all ages attended the event.Co-sponsored by the South Pasadena Chinese-American Club, the City of South Pasadena, and the Friends of the South Pasadena Public Library, the South Pasadena Moon Festival featured traditional music, dance, calligraphy, martial arts, a face-changing artist, crafts and 10 unique performances.The event also conducted the popular “Food Challenge” contest in which teams competed to consume durian, Chinese yam, pickled shallot, a thousand-year-old egg, and bitter melon. Contests also tested noodle-eating capacity and sidewalk chalk-drawing artistry.Treats included homemade cold noodles, egg rolls, sesame buns, cha siu boa, fried rice, boba, and, of course, moon cakes.Inside the packed Library Community Room, children and adults enjoyed Chinese calligraphy, nail art, face painting, several different crafts and tattoos, and vendors offered unique items. A display sponsored by the Chinese Historical Society of Southern California depicted various aspects of local Chinese history. Two representatives of the Miss Chinatown Court participated in the event.A number of officials attending the event, including Judy Chu, Congresswoman, 27th District, who presented a Certificate of Congressional Recognition to the South Pasadena Chinese-American Club “in recognition of your club’s high standards of excellence and outstanding achievements … your tireless efforts in supporting vital causes in the community has left a lasting and positive impact on society.”For more information, visit http://www.spcc-web.org/. 2 recommended0 commentsShareShareTweetSharePin it faithfernandez More » ShareTweetShare on Google+Pin on PinterestSend with WhatsApp,Donald CommunityPCC- COMMUNITYVirtual Schools PasadenaHomes Solve Community/Gov/Pub SafetyPasadena Public WorksPASADENA EVENTS & ACTIVITIES CALENDARClick here for Movie Showtimes Pasadena Will Allow Vaccinated People to Go Without Masks in Most Settings Starting on Tuesday Community News EVENTS & ENTERTAINMENT | FOOD & DRINK | THE ARTS | REAL ESTATE | HOME & GARDEN | WELLNESS | SOCIAL SCENE | GETAWAYS | PARENTS & KIDS Home of the Week: Unique Pasadena Home Located on Madeline Drive, Pasadenalast_img

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