New Tech

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Nodack
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Re: New Tech

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After years of doubts, hopes grow that nuclear fusion is finally for real and could help address climate change
https://www.bostonglobe.com/2021/12/22/ ... te-change/
DEVENS — It’s been compared to everything from a holy grail to fool’s gold: the ultimate solution to clean, readily available energy or an expensive delusion diverting scarce money and brainpower from the urgent needs of rapidly addressing climate change.

For decades, scientists have been trying to harness the energy that powers stars, a complex, atomic-level process known as nuclear fusion, which requires heating a plasma fuel to more than 100 million degrees Celsius and finding a way to contain and sustain it. In theory, fusion could yield inexpensive and unlimited zero-emissions electricity, without producing any significant radioactive waste, as fission does in traditional nuclear power plants.

range of daunting scientific and engineering hurdles has long made that possibility, at best, a distant promise. But now, after breakthroughs this year at MIT and elsewhere, scientists — and a growing number of deep-pocketed investors — insist that fusion is for real and could start sending power to electricity grids in about a decade.


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Nodack
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Re: New Tech

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Autonomous trucker TuSimple logs first no-human road test
https://apnews.com/article/technology-b ... c4223700ba
NEW YORK (AP) — A semitruck completed an 80-mile route in Arizona with no human on board and no human intervention during the trip using technology developed by TuSimple, the company said Wednesday.

The San Diego company says it’s the first successful fully-autonomous run by a class 8 vehicle, or semi, on open public roads with no human intervention.

TuSimple says that drivers represent about 40% of all trucking operational costs and that its virtual driver “can be operated for significantly less.” It also estimates that its technology saves about 10% on fuel-related costs compared to human-driven trucks.

Founded in 2015, TuSimple says it has 70 autonomous trucks globally and two million miles of road testing completed.

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Nodack
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Re: New Tech

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This sounds important

Airlines warn of 'catastrophic' crisis when new 5G service is deployed
https://thehill.com/policy/transportati ... service-is
In a letter to Biden administration officials, executives of major carriers wrote that C-band 5G causes disruptions to airplanes’ instruments that could make “huge swaths” of the U.S. fleet unusable. They noted that by Wednesday’s deadline, most of the nation’s large airports will be under 5G-related flight restrictions from the Federal Aviation Administration (FAA).

The executives urged U.S. officials to prevent 5G from being implemented within 2 miles of affected airports until the FAA figures out a way for affected airplanes to fly safely or risk a “catastrophic disruption” to passenger flights and the global supply chain.

“Immediate intervention is needed to avoid significant operational disruption to air passengers, shippers, supply chain and delivery of needed medical supplies,” they wrote in a letter to White House National Economic Council Director Brian Deese, Transportation Secretary Pete Buttigieg, FAA Administrator Steve Dickson and Federal Communications Commission Chairwoman Jessica Rosenworcel.

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Indy
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Re: New Tech

Post by Indy »

Nodack wrote:
Mon Jan 17, 2022 5:48 pm
This sounds important

Airlines warn of 'catastrophic' crisis when new 5G service is deployed
https://thehill.com/policy/transportati ... service-is
In a letter to Biden administration officials, executives of major carriers wrote that C-band 5G causes disruptions to airplanes’ instruments that could make “huge swaths” of the U.S. fleet unusable. They noted that by Wednesday’s deadline, most of the nation’s large airports will be under 5G-related flight restrictions from the Federal Aviation Administration (FAA).

The executives urged U.S. officials to prevent 5G from being implemented within 2 miles of affected airports until the FAA figures out a way for affected airplanes to fly safely or risk a “catastrophic disruption” to passenger flights and the global supply chain.

“Immediate intervention is needed to avoid significant operational disruption to air passengers, shippers, supply chain and delivery of needed medical supplies,” they wrote in a letter to White House National Economic Council Director Brian Deese, Transportation Secretary Pete Buttigieg, FAA Administrator Steve Dickson and Federal Communications Commission Chairwoman Jessica Rosenworcel.
You would think, but 5G service has been deployed around the world where all these US planes already fly, and no disruptions to date. I am not sure why they are pushing this. I mean the bands do not overlap, and even have a gap between them. The only way it could interfere is if the planes/airlines/cargo carriers are not complying with the wavebands they have already been allotted.

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Nodack
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Re: New Tech

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They make it sound like you can’t have 5G within 2 miles of any airport or you will have disruptions. How are they handling that in Europe or is it not really a thing?

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Nodack
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Re: New Tech

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Europe Has 5G. Here Is Why It Hasn’t Messed Up the Airlines.
https://www.barrons.com/articles/5g-eur ... 1641398766
Meanwhile, across the Atlantic, Europe has 5G and air travel and cargo shipments continue safely. It hasn’t wreaked the havoc Airlines for America warned about.

Why the difference? There could be a number of factors at play, experts told Barron’s.

One thing is for sure: a green light for 5G in Europe doesn’t come from a lack of caution among regulators. After all, the European Union Aviation Safety Agency (EASA) last month warned about the potential risk of interference from 5G near airports—in the U.S.

The EASA said at the time that “no risk of unsafe interference has been identified in Europe.” Instead, the regulator cited the Federal Aviation Administration, which saw specific risk in the U.S. due to the implementation of potentially higher 5G ground station power emissions early this year.

The source of more wariness in the U.S. may stem from the guts of the radio technology itself.

The issue at hand is whether signals from 5G radio bands—intended for devices—could interfere with aircraft altimeters, which are crucial instruments that tell pilots the altitude of their plane. Radar altimeters are close neighbors to 5G in the radio spectrum.

This potential problem is most pronounced upon landing when 5G stations on the ground are emitting close to an altimeter, or 5G smartphones are transmitting within the plane. This explains why regulators are focused on the safety impact around airports.

George Holmes, the chair and CEO of Resonant (RESN) a 5G industry player, told Barron’s that the difference between the U.S. and Europe stems from allocated frequencies for 5G, and their proximity to the defined band for altimeters.

Resonant is a Nasdaq-listed company that designs radio frequency filters, which are used to isolate signals from the right band while blocking unwanted noise from elsewhere in the radio spectrum. These filters are critical in 5G applications.

In the U.S., 5G is allocated to a range of between 3.7GHz and 3.98GHZ, which is closer to the 4.2GHz-4.4GHz frequency for altimeters than in Europe, which has allocated the 3.4GHz-3.8GHz range for 5G. Holmes said that in Europe altimeter filters will be better at stopping 5G signals, which will result in less potential interference.

“We are dealing with very low probabilities but extremely devastating consequences,” Holmes said. “We are still in the early stages of 5G deployments and usage, so this interference problem remains a potential for the future.”


5G interference could cause Boeing 787s to run off the runway, the US’ FAA warns
https://www.euronews.com/next/2022/01/1 ... -faa-warns
In a notification to airlines, the FAA said that Boeing 787s operated by over 80 international airlines including Air France, British Airways, KLM, LOT, and holiday operator TUI could be affected by interference when landing at airports in the United States.

Why is 5G different?
The issue the FAA is talking about relates to the part of the wireless frequency spectrum given over to 5G, particularly in the US.

Most countries around the world have dedicated a portion of the C-Band radio frequency to 5G. In Europe, this falls in the 3.3-3.8 GHz segment of the wireless spectrum, but in the US, the 5G network due to be switched on this week will operate at 3.7-3.9 GHz.

The radio altimeters in aircraft operate at a frequency of 4.2-4.4 GHz, bringing the 5G signal uncomfortably close, as far as the air safety regulator is concerned.

European regulators have also voiced worries about 5G interference, leading some countries to act.

France's aviation safety authority, the DGAC, issued a notice in February last year stating that altimeter errors could have a "significant adverse impact on flight safety" and recommending that 5G-enabled devices should not be used inflight.

The FAA has also taken a leaf out of France's book, putting buffer zones in place around 50 major airports where mobile network operators will have to turn off 5G towers or work to limit their potential to interfere with aircraft.

This buffer zone will be wide enough to cover the final 20 seconds of flight before landing, the FAA said. That compares to the 96-second buffer zone in force in France, where 5G antennas are also angled downwards in order to reduce the risk of interference.



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Indy
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Re: New Tech

Post by Indy »

So basically the US-based altimeters are more noisy and susceptible to near-band interference, and the airlines don't want to fix it.

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Nodack
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Re: New Tech

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That would mean replacing every altimeter in every Boeing 787 around the globe. Maybe that’s feasible.

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Indy
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Re: New Tech

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I don't think it is replacing them. It is making sure they operate in the range they are allotted, and don't have interference at other close bands. And it looks like they sold less than 900 total.

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