• 3 Posts
  • 495 Comments
Joined 2 years ago
cake
Cake day: August 18th, 2024

help-circle


  • Supercritical CO2 has been looked at a lot for the Brayton cycle which can get 50% efficiency compared to steam that generally caps out around 34%

    The US and china both published studies talking about a brayton turbine but to my knowledge no commercial plants running off of it have been built yet





  • My 3 mile bike ride takes 2 minutes longer door to door than driving.

    As has been repeated a few hundred times in this thread already, the part that makes it takes so long is car centric infrastructure. If you live in suburbia where you have a population density of 1k/mi2 (400/km2) you will have to travel a much more significant distance than if you live in a place that has 9k/mi2 (3500/km2)

    Then with less car centric infrastructure the benefit of having parking right next to work starts to go away and the extra space can be used to shorten commutes as well




  • So why not keep time as a constant and if individual places want to change times they can do that

    Even just single states can have vastly different sunrise and sunset times and changing 300m people’s schedules so that a few people can have a few extra minutes of sun in the morning for part of the year seems absolutely ridiculous

    A local school district could very easily do a 1 hour shift as the sunrise gets later so that it properly aligns with their local school pickup times








  • But why wasn’t this compared to caffiene from sources like energy drinks? Then even as a control why wasn’t other stimulants like adderal asked about?

    Claiming it’s caffiene by comparing to decaf coffee is dubious to me personally because what kind of people drink decaf? Usually people who were long time coffee drinkers who had to stop for some reason

    So is coffee and tea neuroprotective or is caffiene sensitivity a risk factor for dementia?

    Is caffiene neuroprotective or is it all stimulants?

    The article itself ends in the classic we need to investigate more but that’s clearly not the conclusion most people who discuss this are going to be talking about for the next few months





  • You know they give nitrous to people intentionally during surgery and dental work?

    Like you can wear an O2 monitor while you take a whip it and track your oxygen level and I have never seen it drop below 85% which is the level where they start to get concerned in a hospital

    Taking opiates cause you to just stop breathing and I had to have a breathing device following a surgery because my O2 levels couldn’t be maintained… and people get prescribed opiates and take them at home all the time with no monitoring