• 0 Posts
  • 149 Comments
Joined 1 year ago
cake
Cake day: June 18th, 2023

help-circle
  • CO meter for sure, but a CO2 meter? It’s actually a good idea to have CO alarms in your house if using natural gas powered appliances. However CO2 is only a concern if you’re in a hermetically sealed environment like a submarine or space ship. I suppose it could be useful to check proper ventilation in the home, but normally you can just open a window.

    Anyway the Earth has a carbon cycle, in other words it filters natural CO2 emissions through environmental processes. The problem is the amount added by industry is more than the natural carbon cycle can process. So levels are steadily increasing.

    When we talk about zero carbon footprint we mean sources from industry like driving gasoline powered cars, generation of electricity, and production of consumer goods. A good amount already comes from natural processes like volcanos and erosion so we don’t actually need a zero carbon footprint, just need it low enough to avoid overwhelming the natural cycle.

    At a personal level it would be just about impossible to have a zero carbon footprint. If you had a solar and wind powered home off-grid and used it to charge an electric car you could be well below average. However any consumer goods you use put carbon in the air to produce them. Even if you went full native you’d still be putting carbon in the air burning wood and candles.







  • I would say this is likely not a practical super conductor… But it may well be the first ever room temperature super conductor.

    Yes of course it would be a big deal if they create one to begin with. However if it’s difficult and expensive to produce, that’s not much help. It has to be mass producible and inexpensive to have industrial significance. I mean we already have expensive solutions. Don’t need any more of those.

    The first semi-conductors were not practical either, but we can all see where that led!

    I don’t know that semiconductors are a good parallel. Growing the crystals dates back to the early 1900s and was never an expensive or technologically difficult process. Doping silicon to create devices like diodes and transistors was something new, but was not exceedingly expensive or a great technological challenge. The migration to chips which require lithographic doping was more of a challenge.

    In any case semiconductor devices were practical shortly after development. One of the first consumer products that used them was the “transistor radio” which was inexpensive and came out shortly after invention of the technology.






  • Would this potential superconductor work in devices like phones and laptops? Would it lead to more efficient operation?

    If inexpensive it could be used in power components for consumer electronics like phones and laptops, but wouldn’t make a huge difference since most of the power consumption occurs in chips and displays where superconductors wouldn’t apply. Though it could lead to some reduction in size and better efficiency. Battery operated devices are considered low power. High power applications are where superconductors offer the most benefit.



  • That’s good they won’t be adopting WEI, but if my bank or some other critical site decides to enforce a desktop browser with it, I’m still in the same boat. I did think of a way to avoid a WEI browser on my desktop if it comes to that. I can probably substitute a phone app for any critical services, but that’s still a drag. I don’t like phone apps much, I use a desktop browser for everything.

    I think Google’s destruction of the Internet is most simply a matter of influence. If Chrome didn’t have the huge market share they wouldn’t be able to pull off this kind of thing, open source or not. Unfortunately people have a herd mentality with everything on the internet so we allowed it to happen by doing what we always do.


  • A conductor with no resistance is a big deal for many electrical applications. Electrical resistance is often a big part of design. Removing that aspect changes things significantly. Electrical power losses and the size of conductors can be greatly reduced.

    I’ve read lots of unsubstantiated claims about superconductors. A solution has to be producible in quantity at a reasonable cost. Otherwise it’s not going to be a breakthrough. I mean we currently have expensive and bulky superconductor solutions, but they’re limited to applications where it’s reasonable such as MRI machines and particle accelerators.

    An inexpensive room temperature superconductor would make the most difference in tech sectors such as power transmission, electromechanical, and power electronics. These are areas where power loss due to circuit resistance is a big part of design. The impact would be minimal for computing and logic. There may be areas where power loss can be reduced, but logic relies on semi-conductors which must have resistance to function, it’s in the name. The term “semi” implies resistance.


  • Here’s something more interesting. A matter-antimatter reactor converts 100% of mass to energy so it’s a hundred times more efficient than fusion. In modern times antimatter has been produced at quantum levels in large accelerators such as the Hadrian collider. So it does in fact exist and can be produced.

    However a matter-antimatter reactor has some serious technical problems. For one it’s currently impossible to create antimatter in any practical quantity. Second if antimatter comes in contact with matter, instant boom. Like a sugar cube size of the stuff could level a large city. So containment would be an insurmountable problem.

    The interesting part is when you see an antimatter reactor in shows like Star Trek, it’s based on real science. Interestingly in 1968 when they wrote the original Star Trek, nobody knew antimatter was a physically real thing. That’s a case of sci-fi predicting science.


  • Fusion and fission are quite different. A practical fusion reactor does not exist. It’s outside our technological capability right now. Current fusion reactors are only experimental and can not maintain a reaction more than a small fraction of a second. The problem is plasma containment. If that can be solved, it would be possible to build a practical fusion reactor.

    The fuel for a working fusion reactor would likely be deuterium/tritium which is in effect unlimited since it can be extracted from seawater. Also the amount of fuel required is small because of the enormous amounts of energy produced in converting mass to energy. Fusion converts about 1% of mass to energy. Output would be that converted mass times the speed of light squared which is a very, very large number, in the neighborhood of consumed fuel mass times 1015.

    Fusion is far less toxic to to the environment. With deuterium/tritium fusion the waste product is helium. All of the particle radiation comes from neutrons which only require shielding. Once the kinetic energy of the particles is absorbed, it’s gone. There’s no fissile waste that lingers for some half life.



  • It’s like when USA police agencies only bought Harley Davidson motorcycles because it was politically correct to source equipment from domestic sources. Once they realized what over-priced and poor performing machines they are, they gave up on the idea and went to foreign sources.

    Personally I think the taxes we pay to support government organizations should go toward domestically sourced equipment. They should be supporting the local economy, but it’s so one sided now they don’t really have a choice. However with some industries it can be a slippery slope. There was a recent USA ban on telecom equipment from Huawei related to this.