Dhaka, Mar 13 (UNB) - Scientists have reversed the direction of time with a quantum computer, reports Independent.
The breakthrough study seems to contradict basic laws of physics and could alter our understanding of the processes governing the universe.
In a development that also represents a major advance in our understanding of quantum computers, by using electrons and the strange world of quantum mechanics, researchers were able to turn back time in an experiment that is the equivalent of causing a broken rack of pool balls to go back into place.
Anyone watching the computer would see the event as if time had turned backwards.
The researchers – from the Moscow Institute of Physics and Technology and helped by colleagues in Switzerland and the US – expect the technique to improve in time, becoming more reliable and precise with time.
Lead researcher Dr Gordey Lesovik, who heads the Laboratory of the Physics of Quantum Information at the Moscow Institute of Physics & Technology (MIPT), said: "We have artificially created a state that evolves in a direction opposite to that of the thermodynamic arrow of time."
The "time machine" described in the journal Scientific Reports consists of a rudimentary quantum computer made up of electron "quabits".
A qubit is a unit of information described by a "one", a "zero", or a mixed "superposition" of both states.
In the experiment, an "evolution program" was launched which caused the qubits to become an increasingly complex changing pattern of zeros and ones.
During this process, order was lost – just as it is when the pool balls are struck and scattered with a cue.
But then another program modified the state of the quantum computer in such a way that it evolved "backwards", from chaos to order.
It meant the state of the qubits was rewound back to its original starting point.
Most laws of physics work both ways, in the future and the past. If you see a video of a pool ball knocking into another one, for instance, and then reverse that same video, the physical processes would both make sense and it would be impossible at the level of physics to know which way around would be correct.
But the universe does have one rule that goes only in one way: the second law of thermodynamics, which describes the progression from order to disorder.
If you saw a video of someone breaking a perfectly arranged triangle of pool balls into a mess, for instance, then watching that backwards would obviously look nonsensical.
The new experiment is like giving the pool table such a perfectly calculated kick that the balls rolled back into an orderly pyramid.
The scientists found that, working with just two qubits, "time reversal" was achieved with a success rate of 85 per cent. When three qubits were involved more errors occurred, resulting in a 50 per cent success rate.
The error rate is expected to drop as scientists improve the devices used to be more sophisticated, the researchers behind the discovery said.
The experiment could have a practical application in the development of quantum computers, the scientists said.
"Our algorithm could be updated and used to test programmes written for quantum computers and eliminate noise and errors," said Dr Lesovik.
Geneva, Mar 13 (AP/UNB) — At the ripe old age of 30 and with half the globe using it, the World Wide Web is facing growing pains with issues like hate speech, privacy concerns and state-sponsored hacking, its creator says, trumpeting a call to make it better for humanity.
Tim Berners-Lee on Tuesday joined a celebration of the Web and reminisced about his invention at CERN, the European Organization for Nuclear Research, starting with a proposal published on March 12, 1989. It opened the way to a technological revolution that has transformed the way people buy goods, share ideas, get information and much more.
It's also become a place where tech titans scoop up personal data, rival governments spy and seek to scuttle elections, and hate speech and vitriol have thrived — taking the Web far from its roots as a space for progress-oriented minds to collaborate.
As of late 2018, half of the world was online, with the other half often struggling to secure access.
Speaking at a "Web@30" conference at CERN, Berners-Lee acknowledged that a sense among many who are already on the Web has become: "Whoops! The web is not the web we wanted in every respect."
His World Wide Web Foundation wants to enlist governments, companies, and citizens to take a greater role in shaping the web for good under principles laid out in its "Contract for the Web."
Under the contract, governments are called upon to make sure everyone can connect to the internet, to keep it available and to respect privacy. Companies are to make the internet affordable, respect privacy and develop technology that will put people — and the "public good" — first. Citizens are to create and to cooperate and respect "civil discourse," among other things.
"The Contract for the Web is about sitting down in working groups with other people who signed up, and to say, 'Ok, let's work out what this really means,'" Berners-Lee said. It was unclear, however, how such rules would be enforced.
Berners-Lee cautioned it was important to strike a balance between oversight and freedom but difficult to agree what it should be.
"Where is the balance between leaving the tech companies to do the right thing and regulating them? Where is the balance between freedom of speech and hate speech?" he said.
The conference, which brought together internet and tech experts, also gave CERN the chance to showcase its reputation as an open-source incubator of ideas. Berners-Lee worked there in the late 1980s, and had been determined to help bridge a communications and documentation gap among different computer platforms.
As a young English software engineer at CERN, Berners-Lee, who is now 63, came up with the idea for hypertext transfer protocol — the "http" that adorns web addresses — and other building blocks for the web.
The "http" system allowed text and small images to be retrieved through a piece of software — the first browser — which Berners-Lee released in 1990 and is considered the start of the web. In practice, the access to a browser on a home computer made the internet easily accessible to consumers for the first time.
Speaking to reporters on Monday, Berners-Lee recalled how his research was helped by his former boss at CERN, Mike Sendall, who wanted a pretext to buy a then-new Next computer by Steve Jobs' Apple needed for his research.
Berners-Lee said Sendall told him to "'pick a random program to develop on it ... Why don't you do that hypertext thing?'"
Berners-Lee has since become a sort of father figure for the internet community, been knighted by Queen Elizabeth II and named as one of the 100 most important people of the 20th century by Time magazine.
While he now wants to get the debate going, other panelists expressed concerns like the increasing concentration of control of the internet by big corporate players, and fretted about a possible splintering of cyberspace among rival countries.
"The challenges come from the same things that make it (the Web) wonderful, and that's the difficulty," said conference panelist Zeynep Tufekci, an associate professor at the University of North Carolina's School of Information and Library Science.
"The openness is wonderful, the connectivity is wonderful, the fact that it was created as a network for academics who are kind of into trusting each other..." she said.
Now with the Web, "there's an enormous amount of centralization going on, with a few big players becoming gatekeepers. Those few big players have built, basically, surveillance machines," she said. "It's based on surveillance profiling us and then targeting us for ads — which wasn't the original idea at all."
New York, Mar 13 (AP/UNB)- Facebook, already the leader in enabling you to share photos, videos and links, now wants to be a force in messaging, commerce, payments and just about everything else you do online.
The company's ambitions harken to how WeChat has become the centerpiece of digital life in China, where people use it to order movie tickets, subway passes, food delivery and rides. If Facebook succeeds in turning its own messaging services into a platform for everything, it could ultimately threaten established services such as Snapchat, Yelp, Venmo, eBay and even Apple and Amazon.
"It's clear that Facebook does have very broad ambitions here," said Bob O'Donnell, president and chief analyst at Technalysis Research. "Their goal is to be the WeChat of everywhere but China."
But Facebook faces numerous hurdles. A key one is restoring user trust, following a string of privacy failures that includes the sharing of personal information from as many as 87 million users with a consulting firm affiliated with Donald Trump's campaign. And any change may cause users to rethink their relationship with Facebook.
"Facebook has a lot of momentum but it's not completely invincible," said Roger Kay, an analyst at Endpoint Technologies Associates. "People came to Facebook for a particular thing. Offer them a different thing, and they're likely to re-evaluate whether they want to be there at all."
After all, Friendster and Myspace came and went as Facebook grew. Yahoo and AltaVista moved over for Google. And remember when AOL was popular, powerful and rich enough to buy the traditional media company Time Warner? Both AOL and Yahoo are now fading brands within Verizon.
After building an advertising-supported service that depends on vacuuming up data on your hobbies, interests and political views, CEO Mark Zuckerberg announced last week that Facebook will now emphasize ways for small groups to communicate in a truly private fashion.
This involves scrambling all messages in WhatsApp, Instagram Direct and Messenger so that even Facebook itself can't read them. Facebook will also let messages automatically disappear after a set amount of time, something rival Snapchat already does.
Facebook, Zuckerberg said, will "then build more ways for people to interact on top of that, including calls, video chats, groups, stories, businesses, payments, commerce, and ultimately a platform for many other kinds of private services."
Facebook declined to further elaborate on its ambitions, and a spokeswoman reinforced that it is early in the process. But there are clues in what Chinese tech giant Tencent has already done with WeChat in China. WeChat combines functions that are typically done by separate companies elsewhere — think of Facebook and its messaging services combined with PayPal and Uber. People use WeChat to buy goods in retail stores, split restaurant bills with friends, pay utility bills, donate to charities and hail rides from the Uber-like Didi Chuxing service.
Facebook already lets people send money to other individuals through Messenger in the U.S. and a few other countries and is testing payments through WhatsApp in India. The New York Times reported that Facebook is also developing its own digital currency to make it easier for users to send money to their messaging contacts.
Facebook didn't offer many details on its digital currency endeavors, but said a "new small team" was looking for ways to make use of the type of technology powering bitcoins and other cryptocurrencies.
While the current payment options require linking Facebook to bank accounts or services such as PayPal, a digital currency could potentially work without them. That could appeal to users, especially in Asia and Africa, with limited access to banking services, said Avivah Litan, a Gartner analyst who specializes in security and payments.
And it would solve a key challenge with commerce on phones. Litan said entering credit card details on a phone is cumbersome, and businesses often lose customers before they complete orders. If Facebook can integrate payments into messaging, it can keep users within Facebook and convince advertisers they're more likely to complete sales.
Facebook could also diversify revenue beyond advertising. For instance, it could take a commission, whether for newspaper subscriptions or food deliveries, much as Apple already does with a cut of up to 30 percent for app payments.
Kay said messaging could become one-stop shop for Yelp-like business reviews, OpenTable restaurant reservations, on-demand delivery similar to Uber and a marketplace akin to eBay — the latter being something Facebook already offers on its main app. Amazon might be tougher to challenge, he said, given the company's expertise in delivery logistics, but there might be pieces such as grocery delivery that Facebook can go after.
Nonetheless, potential Facebook rivals need not pack up yet. Zuckerberg's blog read as a manifesto, a list of things he wants to implement, and it's unclear how much will actually get executed, eMarketer analyst Debra Aho Williamson said. She said it's too soon for competitors to start drastically adapting.
"You cannot be blase about anything Facebook says or does," she said. "But I think there is certainly time to see how this all plays out."
There also might be room for Facebook to sit alongside existing services. Facebook might turn to OpenTable within messaging, for instance, rather than build its own service for dinner reservations.
"It depends on what exactly the product looks like and how differently useful it is for different kinds of audiences," said Brian Wieser, an executive at the advertising consultancy GroupM. "It's not necessarily a zero-sum game."
For now, analysts say, potential competitors need to pay attention and be ready to adapt once details are out. Businesses that ignore the threat do so at their own peril.
Potential rivals can also start emphasizing how they are different from Facebook — as Apple is doing by stressing privacy protections in its devices and services. O'Donnell added that those in payments need to make sure their services are compelling and easy to use so that they can compete with whatever Facebook brings.
Apple, Amazon, eBay and OpenTable didn't respond to messages for comment. Yelp, Snap and PayPal, which also owns Venmo, declined to comment.
The most immediate threat Facebook poses is to other messaging services. Apple's iMessage is popular on iPhones, but there's no version for Android. Facebook could look more appealing as it breaks down walls and makes its three discrete messaging services work together as though they were one.
Snapchat, meanwhile, has struggled since Facebook and its Instagram service copied a feature for posting temporary "stories" that disappear after 24 hours. Zuckerberg dedicated a section of his blog announcement to "reducing permanence," suggesting that Facebook will now take on Snapchat's core feature of letting photos "disappear" after a set number of seconds.
"It's yet another example of Facebook trying to attack Snapchat," BTIG analyst Rich Greenfield said.
But whether Facebook succeeds will depend on how many people are willing to move their conversations. Greenfield said Snapchat has a lock on its core, younger audience.
Facebook's plan may face external competition of its own. Unlike WeChat, Facebook faces new privacy regulation in Europe and calls for more controls in the U.S., Forrester analyst Jessica Liu wrote . Zuckerberg is trying to strike an "impossible balance" between capturing more of users' time, appealing to advertisers and appealing to regulators.
"Zuckerberg can't have his cake and eat it, too," she wrote.
Dhaka, Mar 12 (UNB)-Robishop, has been offering 42 percent discount on a popular smartphone device, OnePlus 5T.
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Dhaka, Mar 12 (UNB) – Posts, Telecommunications and Information Technology Minister Mustafa Jabbar on Tuesday called upon all the internet service providers (ISPs) to ensure broadband service with a unified rate across the country.
“One country one rate should be ensured in order to spread fixed broadband internet service access the country,” said the minister while addressing a roundtable discussion organised by Telecom Reporters’ Network Bangladesh (TRNB) at a city hotel.
“If necessary, the government will provide subsidy to ensure internet with a unified rate all over the country,” said the minister adding, “But, at first you’ll have to set the rate.”
He also warned that the government will not compromise with any mobile phone operator when it comes to providing maximum services. “No excuse will be tolerated. You must ensure the best service.”
The Fifth Generation (5G) Internet will be ensured across the country within 2021-2013, Jabbar said.
The ICT minister urged both Nationwide Telecommunication Transmission Network (NTTN) operators and ISPs to find out a solution as to ensure best internet services rather than blaming each other.
TRNB President Muhammad Zahidul Islam, General Secretary Samir Kumar Dey and Summit Communication CEO Arif Al Islam, among others, joined the discussion.