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Asteroids are much harder to destroy than scientists originally thought

first_imgThe options are limited. SCIEPRO Nuking an asteroid out of the sky to protect the Earth is great fodder for the silver screen. However, new research suggests that simply blowing up a threatening space rock may not save us quite as simply as we might hope. Scientists find rogue asteroids roaming our solar system often — just last month they discovered yet another one that could (maybe) strike the Earth. One of the ways to deal with these potential threats is to impact them, knocking them off course. NASA is currently planning an asteroid redirect mission where it’ll send a kamikaze spacecraft into the moonlet of an asteroid known as Didymos, barreling into the rock to shoo it away.Yet we haven’t had a lot of opportunities to study asteroids up close, so we can’t appreciate exactly how they are structured or how they might be destroyed. It has been believed that bigger asteroids may be easier to destroy because they would be more likely to have cracks and weaknesses that make them easy to blow apart. Thus, if an asteroid were to threaten our peaceful existence, what should we do?”Are we better off breaking it into small pieces, or nudging it to go a different direction? And if the latter, how much force should we hit it with to move it away without causing it to break?” asks Charles El Mir, lead author on the study, in a press release. Those questions are exactly what he and a team at Johns Hopkins University set out to answer.In the simulation, an asteroid splits apart but is pulled back together by the effect of gravity. This animation is sped up — this phase occurs over many hours. Johns Hopkins University/YouTube Their findings, published in an upcoming issue of the journal Icarus, are based on computer simulations of asteroid impacts. They plugged in parameters that digitally recapitulated a small asteroid, about 1 kilometer wide, impacting a large asteroid, about 25 times bigger, while travelling at 5 kilometers per second.A previous model had shown that the large asteroid was obliterated by this type of collision — but the Johns Hopkins team found an entirely different endgame. According to their modelling, the asteroid would greatly fracture in the fractions of a second after an impact.Over the hours after an impact though, the team showed the large asteroid broke apart into smaller pieces but wasn’t entirely obliterated as previous research had shown. The fragments that flew off the asteroid were then pulled back together by the damaged asteroid core, due to the overwhelming effect of gravity.Thanks, gravity.”We used to believe that the larger the object, the more easily it would break, because bigger objects are more likely to have flaws,” said El Mir. “Our findings, however, show that asteroids are stronger than we used to think and require more energy to be completely shattered.”The strength of the asteroid to resist such an impact allows it to preserve its gravitational pull, which could wreak havoc if we were to blindly fire rockets at an incoming rock. Understanding these interactions better prepare us for the decisions that will have to be made, should an asteroid be set on colliding with the Earth.Originally published March 6 at 7:13 p.m. PTUpdate, March 7 at 1:15 a.m.: Clarifies earlier experiment. Share your voice 1 Commentcenter_img Tags Sci-Techlast_img read more

Wikipedia says The North Face manipulated site to top Google results

first_imgIn a statement, The North Face said: “We believe deeply in @Wikipedia’s mission and apologize for engaging in activity inconsistent with those principles. Effective immediately, we have ended the campaign and moving forward, we’ll commit to ensuring that our teams and vendors are better trained on the site policies.” Yesterday, we were disappointed to learn that @thenorthface and @LeoBurnett unethically manipulated Wikipedia. They have risked your trust in our mission for a short-lived consumer stunt. 1/ https://t.co/aIl5XEkS3z— Wikipedia (@Wikipedia) May 29, 2019 Tags Wikipedia slammed The North Face for adding product photos to the platform to boost its search ranking. NurPhoto/Getty Images Wikipedia says The North Face violated its terms by swapping photos on the site with its own in order to appear at the top of Google searches. The Wikimedia Foundation, the nonprofit that hosts Wikipedia, said Wednesday that The North Face and ad agency Leo Burnett Tailor Made “unethically manipulated” Wikipedia after removing photos on the platform and replacing them with ones featuring The North Face’s products. In an ad campaign video boasting about the strategy, the companies said they “hacked the results” so that The North Face appears at the top of Google whenever someone searches for an adventure. They said they paid “absolutely nothing just by collaborating with Wikipedia.” The Wikimedia Foundation denied involvement in the campaign. “What they did was akin to defacing public property,” the Wikimedia Foundation said in a post. “When The North Face exploits the trust you have in Wikipedia to sell you more clothes, you should be angry. Adding content that is solely for commercial promotion goes directly against the policies, purpose and mission of Wikipedia to provide neutral, fact-based knowledge to the world.”Volunteers with the Wikimedia Foundation took down The North Face’s images or cropped out the logos and are ensuring the affected articles “meet Wikipedia’s standards of neutrality and reliable sourcing,” the nonprofit said.Wikipedia tweeted about the incident, saying: “Yesterday, we were disappointed to learn that @thenorthface and @LeoBurnett unethically manipulated Wikipedia. They have risked your trust in our mission for a short-lived consumer stunt.” Google 0 Share your voicecenter_img 1:25 Internet Now playing: Watch this: Post a comment Google’s head of advertising calls for privacy, but not…last_img read more

Three Wipro call centre employees arrested for security breach

first_imgThree employees of a call centre run by Wipro for London-based telecom service provider TalkTalk have been arrested in India for alleged breach of security.The arrests in Kolkata earlier this month were made after TalkTalk detected the alleged breach while conducting a data security review and informed the police, reported PTI.While confirming the arrests, TalkTalk clarified they were not related to a hacking detected last October when personal information of its customers were “compromised”. “Following the October 2015 cyber-attack, we have been conducting a forensic review to ensure that all aspects of our security are as robust as possible — including that of our suppliers. Acting on information supplied by TalkTalk, the local police have arrested three individuals who have breached our policies and the terms of our contract with Wipro. We are also reviewing our relationship with Wipro,” PTI quoted TalkTalk as saying in a statement.Wipro has said it is “working closely” in the investigation and will “extend its full cooperation” to the authorities probing the allegations.”Wipro is committed to maintaining the integrity and confidentiality of all customer data, and has a zero-tolerance policy on security breaches,” the Bengaluru-based company said in a statement.”Wipro is working closely with the customer in the investigation and will continue to extend its full cooperation to the investigating authorities,” Wipro was quoted by PTI as saying.last_img read more