January 19, 20223 yr How Europe rolled out 5G without hurting aviation https://www.msn.com/en-us/news/technology/how-europe-rolled-out-5g-without-hurting-aviation/ar-AASWmEj?ocid=BingNews Quote Mobile phone companies in the United States are rolling out 5G service in a spectrum of radio waves with frequencies between 3.7 and 3.98 GHz. The companies paid the US government $81 billion in 2021 for the right to use those frequencies, known as the C-Band. But in Europe, 5G services use the slower 3.4 to 3.8 GHz range of spectrum. The aviation industry is worried that US 5G service is too close to the spectrum used by radar altimeters, which is between 4.2 and 4.4 GHz. Europe does not face the same risk, according to the industry, because there is a much larger buffer between the spectrum used by radar altimeters and 5G. The gist of this story, is the US is using higher bandwidth frequencies closer to the ones used by aviation. However, if this is true, it means the equipment on the airlines is built with crappy specifications, unable to properly discriminate frequencies. If your receiver for 4.2GHz is accepting 4 or 3.8, your stuff is built with far too much slop.
January 19, 20223 yr 4 minutes ago, Toastrel said: How Europe rolled out 5G without hurting aviation https://www.msn.com/en-us/news/technology/how-europe-rolled-out-5g-without-hurting-aviation/ar-AASWmEj?ocid=BingNews The gist of this story, is the US is using higher bandwidth frequencies closer to the ones used by aviation. However, if this is true, it means the equipment on the airlines is built with crappy specifications, unable to properly discriminate frequencies. If your receiver for 4.2GHz is accepting 4 or 3.8, your stuff is built with far too much slop. It's not just the receivers, but also the transmitters, that have to be assessed in a tolerance stack up analysis. Though I question why this issue is arising now rather than when the specs were granted approval. From what I gather, the airlines want a gradual roll-out to iron out any potential wrinkles which I guess was never agreed to from the telecoms.
January 19, 20223 yr I asked my brother in law who has worked on 5G since the beginning. He says the specs have been public for years.
January 23, 20223 yr NASA satellite captures a dazzling, important crater on Mars https://mashable.com/article/nasa-mars-crater Quote The crater, while an impressive feature in the Martian desert, also serves an important purpose for planetary scientists. It accurately marks the location of zero longitude on Mars, the line separating Mars' western and eastern hemispheres. More news from beyond the dome.
January 26, 20223 yr YouTuber creates world's first retractable lightsaber that can cut through steel Asha C. Gilbert, USA TODAY Wed, January 26, 2022, 10:32 AM A Russian YouTuber is living out a "Star Wars" dream after creating the world's first retractable lightsaber. Alex Burkan, behind the YouTube channel Alex Lab, was recognized by Guinness World Records for the over 3 foot plasma blade that reaches temperatures over 5,072 degrees Fahrenheit and can cut through steel, according to a news release. Burkan told Guinness his main field of research was in hydrogen generation equipment and creating the saber was a daunting task. "All my life I was a great 'Star Wars' fan and the lightsaber was my most-wanted gadget," he said. "For many years I have collected ideas and spare parts for my lightsaber and power equipment on the internet markets and [from] scrap yards." The first step was building an electrolyser – a device that creates a large amount of hydrogen and oxygen gases and splits them, Burkan told Guinness
February 2, 20223 yr North Korea Hacked Him. So He Took Down Its Internet Disappointed with the lack of US response to the Hermit Kingdom's attacks against US security researchers, one hacker took matters into his own hands. https://www.wired.com/story/north-korea-hacker-internet-outage/ Quote For the past two weeks, observers of North Korea's strange and tightly restricted corner of the internet began to notice that the country seemed to be dealing with some serious connectivity problems. On several different days, practically all of its websites—the notoriously isolated nation only has a few dozen—intermittently dropped offline en masse, from the booking site for its Air Koryo airline to Naenara, a page that serves as the official portal for dictator Kim Jong-un's government. At least one of the central routers that allow access to the country's networks appeared at one point to be paralyzed, crippling the Hermit Kingdom's digital connections to the outside world. Some North Korea watchers pointed out that the country had just carried out a series of missile tests, implying that a foreign government's hackers might have launched a cyberattack against the rogue state to tell it to stop saber-rattling. But responsibility for North Korea's ongoing internet outages doesn't lie with US Cyber Command or any other state-sponsored hacking agency. In fact, it was the work of one American man in a T-shirt, pajama pants, and slippers, sitting in his living room night after night, watching Alien movies and eating spicy corn snacks—and periodically walking over to his home office to check on the progress of the programs he was running to disrupt the internet of an entire country. Just over a year ago, an independent hacker who goes by the handle P4x was himself hacked by North Korean spies. P4x was just one victim of a hacking campaign that targeted Western security researchers with the apparent aim of stealing their hacking tools and details about software vulnerabilities. He says he managed to prevent those hackers from swiping anything of value from him. But he nonetheless felt deeply unnerved by state-sponsored hackers targeting him personally—and by the lack of any visible response from the US government. Kudos to him. Quote "If they don’t see we have teeth, it’s just going to keep coming.” P4x, Hacker
February 3, 20223 yr On 1/26/2022 at 12:43 PM, jsdarkstar said: Here's how Alex made the First Lightsaber, Lame doesn't make the whoosh noise, it's basically a glorified welding torch.
February 4, 20223 yr Photons Incoming: Webb Team Begins Aligning the Telescope https://blogs.nasa.gov/webb/2022/02/03/photons-incoming-webb-team-begins-aligning-the-telescope/ Quote This week, the three-month process of aligning the telescope began – and over the last day, Webb team members saw the first photons of starlight that traveled through the entire telescope and were detected by the Near Infrared Camera (NIRCam) instrument. This milestone marks the first of many steps to capture images that are at first unfocused and use them to slowly fine-tune the telescope. This is the very beginning of the process, but so far the initial results match expectations and simulations. A three month alignment and THEN maybe we get some really awesome CGI shots of the 'firmament'.
February 16, 20223 yr Woman Becomes Third Person to Be Cured of HIV After Researchers Use New Stem Cell Method Quote A third person has been cured of HIV through an umbilical cord stem cell transplant, a new method of treatment. Remember when the right tried to stop stem cell treatment? Is there anything Republicans aren't wrong about? I would contend that there isn't.
February 16, 20223 yr 5 minutes ago, VanHammersly said: Woman Becomes Third Person to Be Cured of HIV After Researchers Use New Stem Cell Method Remember when the right tried to stop stem cell treatment? Is there anything Republicans aren't wrong about? I would contend that there isn't. oh, so you're saying liberals are killing babies to save people from the gay disease?!?!? HAVE YOU NO SHAME?
March 3, 20223 yr Fly your name around the Moon! https://www.nasa.gov/send-your-name-with-artemis/#user-information On the Artemis 1 mission. Or not. Could be a CGI trick.
March 3, 20223 yr On 2/4/2022 at 2:44 PM, Toastrel said: A three month alignment and THEN maybe we get some really awesome CGI shots of the 'firmament'. Is "firmament" the name of the turtle?
March 9, 20223 yr 5 hours ago, mayanh8 said: He got too close the icewall and the NASA cabal got him.
March 10, 20223 yr NASA Invests in Solid-State, Silent Drone Flight System https://www.cnet.com/science/nasa-invests-in-solid-state-silent-drone-flight-system/ NASA is investing in a new kind of airplane: one that works off a propulsion system with no moving parts. No moving parts. That would be a game changer. Especially if it can carry a decent payload.
March 10, 20223 yr 1 hour ago, Toastrel said: NASA Invests in Solid-State, Silent Drone Flight System https://www.cnet.com/science/nasa-invests-in-solid-state-silent-drone-flight-system/ NASA is investing in a new kind of airplane: one that works off a propulsion system with no moving parts. No moving parts. That would be a game changer. Especially if it can carry a decent payload. Would be limited to only super lightweight airframes, so probably only good for recon.
March 10, 20223 yr 10 minutes ago, we_gotta_believe said: Would be limited to only super lightweight airframes, so probably only good for recon. "The aircraft would enable package delivery missions in noise-sensitive areas or at night, where operations would otherwise not be allowed due to community opposition," reads Barrett's NIAC project summary.
Create an account or sign in to comment