August, 2019

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Proving an aspect of the AB effect when Newtons Third Law doesnt

first_imgUniversity of Nebraska-Lincoln graduate student Adam Caprez fires up the pulsed electron laser used to test the no forces aspect of the Aharonov-Bohm effect.Credit: Herman Batelaan An action doesn’t always result in a reaction. Explore further Study points to non-Newtonian force affecting particles’ flight One of the interesting phenomena present in quantum mechanics is the Aharonov-Bohm (AB) effect. The AB effect predicts that a charged particle, usually an electron in experiments, shows effects from electromagnetic fields in regions where the particle is excluded. This leads to the interesting fact that, in electromagnetism, Newton’s Third Law of Motion doesn’t always hold true. Herman Batelaan explains to PhysOrg.com: “If you want to move anything in the world around you, you need forces. But in the Aharonov-Bohm effect, the electron reacts without any forces. There is no force, but something happens.”Batelaan, a scientist at the University of Nebraska-Lincoln oversaw an experiment done by graduate student, Adam Caprez, and Brett Barwick to demonstrate the absence of forces in the AB effect. A description of the experiment, and their results, is available in Physical Review Letters: “Macroscopic Test of the Aharonov-Bohm Effect.”“The interesting thing,” Batelaan says, “is that experimentally scientists have detected evidence of this effect, and it is mentioned in textbooks. But nobody had shown that no forces are there.” The experiment performed at the University of Nebraska-Lincoln constitutes the first demonstration of a lack of forces. “We know the effects, and this is expected.” Batelaan continues. “Theoretically, scientist predicted this, but we want to see this. Now we have it.”Experimental demonstrations of the AB effect usually include carefully controlled electrons using a distant electromagnetic field. “We understand the physics of this, such that we can take electrons and control them so well that we can see quantum mechanics happening,” Batelaan says. In order to perform the current experiment, the team used a pulse laser to hit a metal needle, a method developed at Stanford. “You have a pulsed electron source,” Batelaan explains, “and you have something you can time.” Batelaan says that if a force is present there will either be a delay, or an early arrival. The experiment showed no time delay, and this demonstrates that the AB effect lacks forces, even though something is clearly happening with the electrons.Caprez said that what he found most appealing is that, “we have a rare example where quantum mechanics, electromagnetism and relativity are all working at the same time.”As far as immediate applications are concerned, Batelaan admits that there isn’t much about this experiment that will be useful on a practical level right now. But, he insists, “This is very fundamental quantum mechanically. It is helpful in terms of a better understanding on the quantum level.” He points out that devices are reducing in size at a rapid pace, and that as science and technology shrink, “we will need to understand the interplay between quantum mechanics and electromagnetic fields as deep as possible.”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. Citation: Proving an aspect of the AB effect: when Newton’s Third Law doesn’t work (2007, December 4) retrieved 18 August 2019 from https://phys.org/news/2007-12-aspect-ab-effect-newton-law.html 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.last_img read more

SETI Astronomer Envisions Technology Capable of Receiving ET Signals by 2032

first_img 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: SETI Astronomer Envisions Technology Capable of Receiving ET Signals by 2032 (2008, November 14) retrieved 18 August 2019 from https://phys.org/news/2008-11-seti-astronomer-envisions-technology-capable.html Explore further Allen Telescope Array begins all-sky surveys ATA Hat Creek, California – Credit: SITI (PhysOrg.com) — SETI, (Search for Extraterrestrial Intelligence) Senior Astronomer Seth Shostak and host of the weekly radio show “Are We Alone,” predicted during a recent conference in San Francisco that “We’ll find ET within two-dozen years”, according to CNET News staffer Daniel Terdiman. The prediction is based on a few qualifiers. The first is the assumption made by researchers within SITI that the power, range and speed of the Allen Telescope Array with 42 radio camera dishes currently on line and a projected total of 350 dishes will evolve into new technologies capable of distances and speed unfathomable presently. Secondly, an obvious component is necessary funding for evolving technologies.The current Allen Telescope Array , (ATA) was made possible by Paul Allen, co-founder of Microsoft making a $25-million donation to SETI. Mr Allen flipped the go- switch in 2007 for the initial 42 radio-camera dishes phase. Since that time ATA has produced amazing images, including atomic hydrogen disposition, heretofore stifled by a lack of exactitude. The completed project will include a total of 350 separate dishes and collectively may act as one virtual dish spanning 2700 miles across. Further funding for ATA is critically needed. Jill Tarter an astronomer and Director of the Center for SETI Research refers to mankind´s search for extraterrestrial intelligence as a “Cosmic Needle-In-A-Haystack.” Her work in the field spans 40-years and includes the Project Phoenix. Director Jill Tarter believes based on the current evidence that we are currently in the early phase of discovery of extraterrestrial intelligence in the universe. Tarter was drawn into the field over 40-years ago by the work of Frank Drake an astronomer who created a mathematical equation which factored in a series of variables critical for life as we know it. He concluded that given his mathematical model there is a strong likelihood that somewhere in the cosmos there is life and we on Earth are not alone. ATA´s current capability is about 1,000 stars that can be viewed simultaneously. The next decade will allow researchers to view up to a million stars at once. According to Dr. Shostak the current Allan Telescope Array can capture millions of frequencies. Researchers work seven days per week in shifts covering 24-hours a day. The radio frequency room houses advanced fiber optics and equipment which allows researchers to monitor 100-million channels with the capability to move up to an additional 100-million channels. According to Shostak, We know technology, by virtue of Moore’s Law, will continue to increase exponentially and may within a decade make obsolete the capacity of the massive Allen Telescope Array. Since the inception of the radio over 100-years ago, Earth has been leaking radio frequencies upward into the universe light years away. The scope, speed and range of ATA and yet to be developed technologies can boost Earth´s capacity way beyond this infant stage. The new technologies are referred to as a SITI hot rod with the ability to view millions of stars simultaneously mega-light years away from Earth. For further reading on the subject check out: www.seti.org/Page.aspx?pid=904 © 2008 PhysOrg.comlast_img read more

Hitachi Maxell to join the wireless charging market

first_img(PhysOrg.com) — Wireless charging, the last bastion of the truly lazy, has gotten a new competitor in the marketplace. Hitachi Maxell has joined the ranks of companies such as Energizer in the wireless charging arena. The Hitachi Maxell unit which is named Qi, you would go with a “chee” sound if you said the name aloud, and it comes in two different models. Harness power of the sun with solar gadgets © 2010 PhysOrg.com Citation: Hitachi Maxell to join the wireless charging market (2011, February 11) retrieved 18 August 2019 from https://phys.org/news/2011-02-hitachi-maxell-wireless.html Explore further The first one is a larger charging station which allows you two slots for the charging of two separate devices at the same time. The second option is a smaller and cheaper unit that will charge only a single device. As with the Energizer model you cannot simply drop your phone as is onto the pad, each of the devices must be placed into its sleeve to get the charge. Unlike the Energizer model this one does not have USB ports for devices that lack sleeves. Both of the devices run on the same wireless standard, which has been adopted by 72 companies and every large-scale hardware maker, with the notable exception of Apple.That is not to say that you will not be able to charge your iPhone. The Qi setup does have a sleeve for iPhone 4 users that will allow them to charge without the cord. As a matter of fact, this device was designed with iPhone users in mind.Hitachi Maxell has not announced the price for either the double- or single- unit charger at this time. US customers do not have a release date, but the devices are expected to be out in Japan during the month of April. 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.last_img read more

Startup creates a biologically inspired picture search engine

first_img Hitachi Releases Facebook Application of Similar Image Search Engine ‘Gazopa’ The search technology was developed by Cortexica, a startup that was created based on research conducted at the Imperial College in London. The technology that the company developed has already allowed users to make an app that can compare wines, known as WINEfindr. Since then Cortexica has release an application-programming interface that will allow for the creation of similar apps based on the search technology. The Cortexica’s VisualSearch platform is inspired by human vision. This gives it the ability to compensate for a variety of different lighting conditions and identify key features of an object, without needing it to be a specific size or facing a specific angle. It is also possible, in some cases to identify objects while they are on the go. Don’t try it with a sports car, but you can probably get the can that someone is dropping in their cart. Recently, Cortexica released its VisualSearch Application-Programming Interface (API) for the technology. The API will allow others to build similar apps. 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. Explore further © 2010 PhysOrg.com Citation: Startup creates a biologically inspired picture search engine (2011, June 21) retrieved 18 August 2019 from https://phys.org/news/2011-06-startup-biologically-picture.html (PhysOrg.com) — We all like to get the best deal possible for the things that we buy but you do not always have the time to go from shop to shop in order to find what you want. Luckily, there is a search tool that can help you to that without using the extra gas. This search tool is a bit different than simply using Google to find the prices. It begins by taking a picture of the item in question. Once your phone takes its snapshot it will begin to look for the item and then give you a look at the prices that you can get in local shops or on the web. This is similar to the bar code scanning applications that are currently on the market only it works with a standard cell-phone photos. More information: www.cortexica.com/index.htmllast_img read more

Google Glass may run with laserprojected keyboard

first_img Citation: Google Glass may run with laser-projected keyboard (2013, January 18) retrieved 18 August 2019 from https://phys.org/news/2013-01-google-glass-laser-projected-keyboard.html Google engineers are capable of thinking their way through the device input issue, however, and expectations are they will carefully focus on controls for wearable computing that promise ease of use as well as effectiveness. As of this week, for example, there is evidence that Google is thinking along the lines of laser-projected keyboards for device control. Their patent description suggests a laser-projected control pad.The patent, “Methods and Systems for a Virtual Input Device,” was made public on Thursday but was filed with the U.S. Patent and Trademark Office in June last year. The patent said that “In one example, the virtual input device includes a projector and a camera. The projector projects a pattern onto a surface. The camera captures images that can be interpreted by a processor to determine actions. The projector may be mounted on an arm of a pair of eyeglasses and the camera may be mounted on an opposite arm of the eyeglasses. A pattern for a virtual input device can be projected onto a ‘display hand’ of a user, and the camera may be able to detect when the user uses an opposite hand to select items of the virtual input device.” This patent could be just the thing that materializes as a feature that comes out in Google Glass in 2014, or not. Project Glass continues to hatch. “We constantly try out new ideas of how this platform can be used,” Babak Parviz, head of the Google Glass project, said in an interview with IEEE Spectrum just this month. “There’s a lot of experimentation going on at all times in Google. We haven’t actually talked about specific features. We have mentioned some basic capabilities, like taking a picture and sharing it. We are experimenting with a lot of things. The feature set for the device is not set yet. It is still in flux.” © 2013 Phys.org More information: Patent Google patent sends ring signals to Project Glass The interesting part is that the Google patent could bring to Project Glass a laser-projected keypad sitting on the user’s hand. The keyboard would not be limited to a specific surface, however, since it is only a projection. The wearer could have it on the arm or the wrist.The tiny laser projector sits in the arm of the glasses to beam out the keypad buttons, and a built-in camera and processor would interpret finger movements in the region of those buttons. The patent says that the virtual keyboard “can be projected onto a surface and components of the keyboard detect finger movements and translate the movements into keystrokes on a device. A projection keyboard unit generally includes a laser to project a visible virtual keyboard onto a surface (e.g., a red diode laser as a light source to project a full size QWERTY layout keyboard, with a size of 295 mm.times.95 mm projected at a distance of 60 mm from the projection keyboard unit), and a sensor or camera to sense finger movements. A location or detected co-ordinates of the finger can be used to determine actions or characters to be generated. ” (Phys.org)—Just when you thought you could swing into 2013 without another report on Google Glass in-the-wings, this is the week your luck runs out. Ideas continue to fly regarding what could possibly be the ideal way to manage control of Google Glass, in order for the user to communicate with the device. How? With what? If touchscreens and mousepads are out of this wearable-computing picture, one uncomfortable alternative would be having to keep reaching up to the glasses themselves to maneuver around. Google Project Glass is the research and development program that holds forth the promise of an augmented-reality head-mounted display that will be fun to wear, useful and easy to use. Project Glass is under the umbrella of the Google X Lab, which hatches technologies for the future such as the much-publicized self-driving cars, and now the A-R glasses. Last year, Sergey Brin modeled the glasses; a consumer edition is expected to appear next year. Explore further 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.last_img read more

Paper on PLOS ONE creates a firestorm by referencing the Creator

first_imgA trio of researchers from China has caused a stir in the technical publishing arena by including some verbiage in a paper published in the open-source journal PLOS ONE that appears to mention creationism as a part of their scientific endeavor. Due to an extremely negative response, PLOS ONE has retracted the article. © 2016 Phys.org Journal information: PLoS ONE More information: Ming-Jin Liu et al. Biomechanical Characteristics of Hand Coordination in Grasping Activities of Daily Living, PLOS ONE (2016). DOI: 10.1371/journal.pone.0146193 Research paper publishing sting reveals lax standards of many open-access journals Credit: PLOS ONEcenter_img Explore further At its core, the paper is a report on an examination the researchers conducted of the human hand—how it is that it is so dexterous and offers so much freedom of control, etc. But in their abstract, they included these words: “…is the proper design by the Creator…”The mention of “the Creator” has been interpreted by many as an allusion to God and creationism, which most in the scientific community see as scientifically invalid. Many have taken to social media to voice their displeasure regarding the apparent “mistake” by the editors, some suggesting that it appeared that the paper had not been peer-reviewed as is supposed to be the case with PLOS ONE, which adds credence to arguments suggesting open-access sites are not offering readers the same degree of quality as pay-wall sites. Others suggest that it might perhaps have been nothing more than a language problem—the authors and editors of the paper are all native Chinese speakers, and indeed, a report suggests that the authors meant to use a synonym for “nature” but somehow found “creator” instead.Thus far, most media outlets have sided with the outraged readership, insisting that such papers have no place in the science arena, though some have joked about the pitchfork mentally of the virtual mob, looking for proper vengeance. What appears to be still missing, however, are the few small voices that find such outrage by science fanatics as ominous; those that call for the persecution of heretics like people of a former time; or those noting that many papers are published in respected journals that rely to some degree on improbable reasoning—Einstein and his “spooky action at a distance,” for example. And other papers make their points by citing the existence of dark matter or dark energy as possible explanations for whatever they are studying, which for now at least, must be taken on faith. 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: Paper on PLOS ONE creates a firestorm by referencing “the Creator” (2016, March 4) retrieved 18 August 2019 from https://phys.org/news/2016-03-paper-plos-firestorm-referencing-creator.htmllast_img read more

New look at how water surface area has changed over the past

first_img(Phys.org)—A team of researchers with Deltares, Boussinesqweg in The Netherlands has published a commentary in the journal Nature Climate Change describing changes to water surface area across the planet over the past 30 years. They describe the technology they used, changes they observed and the new ways that satellite technology may be used in the future. More information: Earth’s surface water change over the past 30 years, Nature Climate Change 6, 810–813 (2016) DOI: 10.1038/nclimate3111 , http://www.nature.com/nclimate/journal/v6/n9/full/nclimate3111.html Clouds over Australia are shown. Credit: NASA Recently, a Dutch research group called Deltares unveiled an online tool they had developed—it is called the the Deltares Aqua Monitor and offers users a visual way to view changes to water surface area for any place on Earth. Information on the maps is made available through merging of data between Google Earth Engine and NASA’s Landsat satellites. Imagery available on the site goes back to 1985 and has a resolution of approximately 30 meters. The authors used the tool to learn more about changes to surface water over the past 30 years.The researchers discovered some undocumented water surface changes, such as the construction of a dam in North Korea and large scale increases in water surface area in Myanmar. Another was the dramatic changes to some coastlines such as island creation off the coast of Dubai, coastal construction off the coast of China and reclamation efforts in Singapore. They also noted the dramatic reduction in size of the Aral Sea, once the fourth-largest freshwater body on the planet, giving it the title of the largest decrease in water surface area. Going the opposite way, the group found that the proliferation of small lakes created by melting glaciers in the Tibetan Plateau represented the largest increase in water surface area. Also notable was the shrinkage of Lake Mead in Nevada, an ominous sign for people living in the Los Angeles area—it has been draining faster than it can be replenished from the Colorado River.Overall, the researchers found that the world has gained 115,000 km2 of water surface area over the past 30 years and 173,000 km2 of land. Interestingly, they also found that the world’s coasts actually grew over the same time period, extending by 33,700 km2, despite rising sea levels. The gain, they point out, was due to humans extending coastal regions for various purposes. They conclude by noting that the new tool offers unprecedented access to water resource information, which means it is likely to be used by a very wide variety of people and groups. Explore further Citation: New look at how water surface area has changed over the past 30 years (2016, August 31) retrieved 18 August 2019 from https://phys.org/news/2016-08-surface-area-years.htmlcenter_img Journal information: Nature Climate Change © 2016 Phys.org Climate change threatens already volatile Urmia Lake 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.last_img read more

Captain Who Rescued Migrants At Sea Refuses Pa

first_imgCaptain Who Rescued Migrants At Sea Refuses Paris Medal,… Tristar Media by NPR News Sasha Ingber, Vanessa Romo 8.21.19 8:22pm The captain of a controversial ship that saved migrants in the Mediterranean Sea has refused to accept a medal for her work.Pia Klemp, who is German, gained attention for rescuing thousands of stranded migrants with her crew as part of the nongovernmental organization Sea Watch International. For her efforts, she reportedly faces up to 20 years in prison in Italy, where the hard-line anti-immigrant government accused her of assisting illegal immigration.In a Facebook message published Tuesday night, Klemp announced that she was rejecting the Grand Vermeil Medal, which the city of Paris awards for bravery. She told Mayor Anne Hidalgo that the city was brimming with hypocrisy.”Your police [steal] blankets from people that you force to live on the streets, while you raid protests and criminalize people that are standing up for rights of migrants and asylum seekers. … You want to give me a medal for actions that you fight in your own ramparts,” Klemp wrote in the scathing post. “It is time we call out hypocrite honorings and fill the void with social justice,” she said. She went on to say that people don’t need medals. “We do not need authorities deciding about who is a ‘hero’ and who is ‘illegal,’ ” she said. “In fact they are in no position to make this call, because we are all equal.”Klemp and nine of her shipmates have been under investigation in Italy after authorities impounded her ship, the Iuventa, in August 2017. For years, authorities there have railed against work by rescue organizations like Sea Watch that pick up stranded migrants fleeing the Libyan coast for Europe. More recently, Italy’s populist interior minister, Matteo Salvini, introduced a controversial security decree banning NGO migrant ships from entering Italian ports. As a result, Klemp and her team have been accused of aiding human trafficking. The Iuventa, formerly a fishing vessel, is estimated to have saved 14,000 people. As NPR’s Sylvia Poggioli reported, migrants from Libya and other countries torn apart by violence had been risking their lives crossing the rough waters of the Mediterranean, arriving on European shores in huge numbers for several years. But as of 2019 there has been a dramatic reduction in asylum-seekers. “There’s been a huge drop in the first six months of this year — 2,100, compared with about 14,300 the year before. That’s an 85% drop,” Poggioli said. The prestigious medal for bravery was awarded to Klemp and Captain Carola Rackete in July. Like Klemp, Rackete defied Italian authorities when she rescued more than 40 migrants off the coast of Libya and rammed her way into a port on the Italian island of Lampedusa. She was subsequently arrested and charged with human smuggling, but the charges were dropped. Klemp’s refusal to accept the medal comes on the heels of a 19-day standoff between a Spanish rescue ship called Open Arms and the Italian government. On Tuesday an Italian court ordered the seizure of the ship and the evacuation of everyone onboard on Lampedusa. Five countries belonging to the European Union have agreed to accept the migrants. Both the German and French governments have criticized Italy over the treatment of migrants, Klemp and Rackete. Salvini’s retort is that the EU’s other 27 member countries should open their borders to welcome the influx. “The City of Paris is fully mobilised to support the refugees, to shelter them and ensure a dignified respect for their humanity,” Hidalgo’s office told Reuters.Copyright 2019 NPR. To see more, visit NPR.last_img read more

Ray Of Love

Legendary filmmaker Satyajit Ray’s real-life love story, revealed now by his wife, was apparently nothing short of a typical Bollywood drama.In her recently released autobiography Manik and I, the late director’s wife Bijoya Ray recalls how the couple dated for eight long years, married secretly and then made a clever plan to convince the two families for the match.In the book published by Penguin, Bijoy recalls that she was friends with the Oscar-winning director, nicknamed Manik, since her teenage days but it was only in 1940 that they began to develop romantic feelings for each other while listening to music together every night. Also Read – ‘Playing Jojo was emotionally exhausting’‘He was younger than me and a close relative. Marriage was therefore out of the question. The two of us decided to never marry. We wanted our lives to continue the way they were,’ Bijoya writes.And when she shifted to Mumbai to find roles in films, Ray, who then used to work in an advertising agency, would write love letters and would often travel all the way from Kolkata to meet his girlfriend. As their bonding deepened, marriage became inevitable. Also Read – Leslie doing new comedy special with NetflixThey planned a registry marriage in Mumbai without the knowledge of Ray’s family, Bijoya’s mother disapproved of the idea. But the duo nevertheless got married at the house of Bijoya’s sister on 3 March 1949.‘I had never imagined I would actually get married to Manik. And when it did happen, we were torn between happiness and pain, as we knew we had to keep our marriage a secret. We couldn’t even live together,’ she writes.Ray, meanwhile, confided everything to their family friend and physician Nosho Babu, who made a clever plan to convince his mother for accepting the marriage. Without revealing that they are already married, Ray declared that he would not marry anyone but Bijoya. Reluctantly and after much persuasion, Ray’s mother agreed and the couple got married once again on 20 October 1949.  “I was overjoyed. After believing I would never be able to marry him, here I was, getting married twice!” read more

One more step for women

first_imgIndira Gandhi National Center for Arts(IGNCA) has planned to organize a program Bhumika to emphasize the role of women in cultural heritage on the occasion of International women’s Day.Under the banner of this program there will be an exhibition cum workshop conducted from 8 March to 14 March at Indira Gandhi Centre for Arts, Janpath, New Delhi, in which women artists across the country will demonstrate their art and craft working in various media including wood carving, painting, clay modeling, music and dance.On 8th March evening a lecture demonstration will be conducted by Dr Subhadra Desai at 5 pm and Singari Melam and a talk by Dr. Kapila Vatsyayan are scheduled on 14 March. The program is open for public throughout the week between 10.30 am to 5.30 pm.The program named is being presented by the Ministry of Culture, under which (IGNCA) was established in 1987 as an autonomous institute.last_img read more