Tag: 女明星

Facial Recognition Helps Astronomers Understand Galaxies

first_img NASA Says 2 Asteroids Will Safely Fly By Earth This WeekendHubble Captures Saturn’s ‘Phonograph Record’ Ring System Let us know what you like about Geek by taking our survey. Stay on targetcenter_img Facial recognition isn’t just for, well, faces: The machine learning method has shown promise in helping astronomers analyze images of galaxies.Using mock Hubble Space Telescope snapshots, researchers trained a deep learning system to recognize key phases of galaxy evolution.When shown a large set of actual Hubble photos to classify, the neural network showed a “remarkable” level of consistency.“We were not expecting it to be all that successful. I’m amazed at how powerful this is,” University of California Santa Cruz professor Joel Primack said in a statement. “We know the simulations have limitations, so we don’t want to make too strong a claim. But we don’t think this is just a lucky fluke.”Deep learning has widely been applied to facial ID and other image- and speech-recognition applications. But it is also surprisingly good at classifying real galaxies in photos.Star systems are notoriously complex, changing appearance as they evolve; following the evolution of an individual galaxy over time is possible only in simulations.In a new study, published recently by Astrophysical Journal, the researchers explored whether deep learning can detect a phenomenon known as “blue nugget.”Turns out it can.Described as the process of young, hot stars emitting short “blue” wavelengths, the BN phase was spotted by the computer program in simulated and observational data. “It may be that in a certain size range, galaxies have just the right mass for this physical process to occur,” co-author David Koo, professor of astronomy and astrophysics at UC Santa Cruz, said.The benefits of machine learning in astronomy are countless.“Deep learning looks for patterns, and the machine can see patterns that are so complex that we humans don’t see them,” Koo continued. “We want to do a lot more testing of this approach, but in this proof-of-concept study, the machine seemed to successfully find in the data the different stages of galaxy evolution identified in the simulations.”And this is just the start. As large survey projects and new telescopes contribute to a growing pile of observational data, deep learning methods will become powerful tools for interpretation.“This is the beginning of a very exciting time for using advanced artificial intelligence in astronomy,” Koo added.last_img read more

Japan Quits IWC to Resume Commercial Whaling

first_imgStay on target Rare, Gray Orca Calf Spotted in CaliforniaWatch: Orca Performs ‘Belly Roll’ During Close Encounter With Boat Japan will reportedly resume commercial whaling next year, after exiting the International Whaling Commission (IWC).In defiance of the 1986 global ban on whale hunting, the country plans to resume operations in July, according to Chief Cabinet Secretary Yoshihide Suga.“The whaling will be conducted in accordance with international law and within the catch limits calculated in accordance with the method adopted by the IWC to avoid negative impact on cetacean resources,” he said in a statement, published by Reuters.Hunting whales for their usable products—meat, oil, blubber—dates back to around 3000 BC; by the late 1930s, more than 50,000 whales were being killed annually. Plunging populations eventually led to an international moratorium on the commercial hunting of whales.Japan, however, took advantage of a loophole allowing for the slaughter of whales in the name of scientific research: It sent vessels to the Antarctic to kill hundreds of whales annually, their meat ending up for sale across the country.The practice ended in 2014, when the International Court of Justice ruled that the program was not legitimate.Japan’s withdrawal from the IWC, however, means it will be free to restart commercial whaling next summer—a move the Australian government is “extremely disappointed” with.“The decision … is regrettable and Australia urges Japan to return to the Convention and Commission as a matter of priority,” Foreign Minister Marise Payne and Environment Minister Melissa Price said in a joint statement.Greenpeace Japan Executive Director Sam Annesley agreed, calling on Japan to “urgently act to conserve marine ecosystems, rather than resume commercial whaling.”“As a result of modern fleet technology, overfishing in both Japanese coastal waters and high seas areas has led to the depletion of many whale species,”  according to Annesley. “Most whale populations have not yet been recovered, including larger [mammals] such as blue whales, fin whales, and sei whales.“The world’s oceans face multiple threats such as acidification and plastic pollution, in addition to overfishing,” he continued. “As a country surrounded by oceans where people’s lives have been heavily reliant on marine resources, it is essential for Japan to work toward healthy oceans. Japan’s government has so far failed to resolve these problems.”The Asian nation will still attend International Whaling Commission meetings, Yoshie Nakatani, an official at the foreign ministry’s fisheries division, announced.“It’s not like we are turning our back on the IWC and abandoning international cooperation,” she said, as reported by Reuters. “There is no change to our country’s respect for the rule of law and multilateralism.”More on Geek.com:Whale Fossil Reveals Surprising Evolutionary StepDead Whale Found With 1,000 Pieces of Plastic Trash in StomachAncient Whale Bones ID Species Lost From Mediterranean Sealast_img read more

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