• 0 Posts
  • 83 Comments
Joined 2 years ago
cake
Cake day: August 3rd, 2023

help-circle

  • No magnetic confinement fusion reactor in existence has ever generated a positive output. The current record belongs to JET, with a Q factor of 0.67. This record was set in 1997.

    The biggest reason we haven’t had a record break for a long time is money. The most favourable reaction for fusion is generally a D-T (Deuterium-Tritium) reaction. However, Tritium is incredibly expensive. So, most reactors run the much cheaper D-D reaction, which generates lower output. This is okay because current research reactors are mostly doing research on specific components of an eventual commercial reactor, and are not aiming for highest possible power output.

    The main purpose of WEST is to do research on diverter components for ITER. ITER itself is expected to reach Q ≥ 10, but won’t have any energy harvesting components. The goal is to add that to its successor, DEMO.

    Inertial confinement fusion (using lasers) has produced higher records, but they generally exclude the energy used to produce the laser from the calculation. NIF has generated 3.15MJ of fusion output by delivering 2.05MJ of energy to it with a laser, nominally a Q = 1.54. however, creating the laser that delivered the power took about 300MJ.



  • They are emissions credits. Every company receives some amount of “CO2 emission credits” from the government. These allow you to emit a certain amount of carbon dioxide. If you don’t emit all the CO2 that your credits allow, you can sell those credits to other companies that need more than the government gives them.

    The idea is to put a total limit on the amount of emissions in the country, while letting the market figure out where it makes most sense economically to invest in emission reduction.

    Tesla makes only EV cars and so it doesn’t need all the credits a typical gasoline car company would receive. So they sell them.




  • A decent rental home in Texas costs about $2650 per month. A similar house costs about $460k to buy, and run about $1000/mo in taxes. So you’ll only save about $1650 per month.

    This would amount to an annual tax rate of 2.6% which is possibly some of the highest property tax rate in all of the United States. The median property taxes paid by homeowners in the US is only $2000 per year.

    Even putting that 460k into a bank account at 4.5% interest will give you $1725/mo, let alone stocks, index funds, and all the other investments you could be doing that will out-perform real estate.

    I agree that real estate as an investment is generally not the best option, but I don’t think that says anything about real estate as a wealth building tool for the middle class. If you compare renting to buying using a mortgage (the typical options) over, say, a 50 year period, buying will almost certainly come ahead in terms of wealth built.

    For a primary residence that you plan to occupy long term, i would recommend buying almost every time. If you’re looking to build more wealth after that, I think there’s usually better options than e.g. buying a second house and renting it out.





  • Rigor in definitions allows us to express a lot of complex things in a compact form. this allows us to treat “Cars” as something different than “Motorcycles” while both a motorized vehicles.

    Meh. There’s plenty of room in the gray zone between “car” and “motorcycle” where things like this or this can exist. The botanical world has worked very hard to create rigorous definitions of fruits and vegetables only to be completely ignored by cooks. The culinary world in general has done just fine for centuries without rigorously specifying whether taco’s are sandwiches and cereal is a soup.

    As long as it is generally understood what people mean by a word when they use it everything will be mostly fine. REST is an understood term, whether the inventor of the term meant something else by it is immaterial.




  • Technically there is no Hi syllable in Japanese either. There is ひ, which phonologically is neither “Hi” nor “Fi”, but somewhere in between. The exact pronunciation varies depending on surrounding sounds, as well as the speaker’s regional accent.

    So I wouldn’t say they really use WiHi. They write WiFi and they say “ワイハイ” which is the closest you can get to WiFi using Japanese sounds. It will kinda sound like WiHi to an English speaker.


  • Microsoft and the European Commission agreed to an initial period of five years. That ended in 2014, and the measure was not extended mainly for two reasons:

    1. Data showed the selection screen had had essentially no effect on browser market share whatsoever.
    2. This period was basically the height of browser competition, with Chrome, Safari, IE, and Firefox all showing significant market share.

    With competition in the browser market seemingly healthy, and the browser ballot not doing much to affect it, it was seen as pointless to keep requiring Microsoft to display it.



  • You now need to remember his velocity, his position on the map, the direction of his flight, his altitude, his plane’s weight and who knows what else, I’m not a pilot.

    You’re not wrong per se, but I’m having trouble fathoming gigabytes of data being consumed by these types of parameters. You could probably track hundreds of thousands of airplanes with that much space. The only thing that I could imagine taking up that much memory is extremely detailed airflow simulation.

    However, as a rule of thumb, the vast majority of memory data for video games is in most cases textures and geometry, and not so much the simulation. Based on the article, it seems this game streams high resolution geometry data based on your current location on earth, which I would say is the most probable reason it asks for so much memory.