5 Facts you should Know about the - Antimatter Antimatter is the stuff of science fiction. In the book and film Angels and Demons , Professor Langdon tries to save Vatican City from an antimatter bomb. Star Trek ’s starship Enterprise uses matter-antimatter annihilation propulsion for faster-than-light travel. But antimatter is also the stuff of reality. Antimatter particles are almost identical to their matter counterparts except that they carry the opposite charge and spin. When antimatter meets matter, they immediately annihilate into energy. While antimatter bombs and antimatter-powered spaceships are far-fetched, there are still many facts about antimatter that will tickle your brain cells. 2. Antimatter is closer to you than you think. Small amounts of antimatter constantly rain down on the Earth in the form of cosmic rays, energetic particles from space. These antimatter particles reach our atmosphere at a rate ranging from less than one per square met...
Artificial intelligence
New tool uses AI to flag fake news for media fact-checkers
A new artificial intelligence (AI) tool could help social media networks and news organizations weed out false stories.
The tool, developed by researchers at the University of Waterloo, uses deep-learning AI algorithms to determine if claims made in posts or stories are supported by other posts and stories on the same subject.
"If they are, great, it's probably a real story," said Alexander Wong, a professor of systems design engineering at Waterloo. "But if most of the other material isn't supportive, it's a strong indication you're dealing with fake news."
Researchers were motivated to develop the tool by the proliferation of online posts and news stories that are fabricated to deceive or mislead readers, typically for political or economic gain.
Their system advances ongoing efforts to develop fully automated technology capable of detecting fake news by achieving 90 per cent accuracy in a key area of research known as stance detection.
Given a claim in one post or story and other posts and stories on the same subject that have been collected for comparison, the system can correctly determine if they support it or not nine out of 10 times.
That is a new benchmark for accuracy by researchers using a large dataset created for a 2017 scientific competition called the Fake News Challenge.
While scientists around the world continue to work towards a fully automated system, the Waterloo technology could be used as a screening tool by human fact-checkers at social media and news organizations.
"It augments their capabilities and flags information that doesn't look quite right for verification," said Wong, a founding member of the Waterloo Artificial Intelligence Institute. "It isn't designed to replace people, but to help them fact-check faster and more reliably."
AI algorithms at the heart of the system were shown tens of thousands of claims paired with stories that either supported or didn't support them. Over time, the system learned to determine support or non-support itself when shown new claim-story pairs.
"We need to empower journalists to uncover truth and keep us informed," said Chris Dulhanty, a graduate student who led the project. "This represents one effort in a larger body of work to mitigate the spread of disinformation."
A paper on their work, "Taking a Stance on Fake News: Towards Automatic Disinformation Assessment via Deep Bidirectional Transformer Language Models for Stance Detection," was presented this month at the Conference on Neural Information Processing Systems in Vancouver.
Time Travel & the Bootstrap Paradox The Bootstrap Paradox is a theoretical paradox of time travel that occurs when an object or piece of information sent back in time becomes trapped within an infinite cause-effect loop in which the item no longer has a discernible point of origin, and is said to be “uncaused” or “self-created”. It is also known as an Ontological Paradox, in reference to ontology, a branch of metaphysics dealing with the study of being and existence. nown as an Ontological Paradox, in reference to ontology, a branch of metaphysics dealing with the study of being and existence. Etymology of Bootstrap Paradox The term Bootstrap Paradox is derived from the expression to “pull oneself over a fence by one’s bootstraps”, which indicates performing an impossible or ludicrous task. In this instance, by pulling yourself over a fence by holding onto your bootlaces and tugging upwards. The first reference to such an absurdly imposs...
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