200 karma · joined April 4, 2014
As for the change, I'm just an interested amateur, so shouldn't go into details and please take this with a big grain of salt, but I've heard it was a result of proposed scenario(s) that some do not regard as realistic.
How so? As I understand it, the breeding reaction is exothermic (Li-6 + n -> He-4 + T) so all you need are neutrons, for which (as someone pointed out to me two years ago[1]) neutron multipliers would be used.
People said it might go badly; they said the same about living with a different colleague, and that also went perfectly for me.
> There are many better ways of calling attention
Written expression is a form of art, not a formula with a correct answer.
You hear an analogous effect used a lot in spoken speech (definitely in the UK, not sure about USA), for example, "ff-<beat>-in' thing". This stresses it in a way, similar to varying tone or volume, that would be missed in a flat reading.
https://nap.nationalacademies.org/resource/25733/interactive...
> Climate is always changing. Why is climate change of concern now?
> All major climate changes, including natural ones, are disruptive. Past climate changes led to extinction of many species, population migrations, and pronounced changes in the land surface and ocean circulation. The speed of the current climate change is faster than most of the past events, making it more difficult for human societies and the natural world to adapt.
https://www.epa.gov/climatechange-science/frequently-asked-q...
> Why be concerned about a degree or two change in the average global temperature?
> A degree or two change in average global temperature might not sound like much to worry about, but relatively small changes in the earth’s average temperature can mean big changes in local and regional climate, creating risks to public health and safety, water resources, agriculture, infrastructure, and ecosystems. Among the many examples cited by the 2018 National Climate Assessment are an increase in heat waves and days with temperatures above 90°F; more extreme weather events such as storms, droughts, and floods; and a projected sea level rise of 1 to 4 feet by the end of this century, which could put certain areas of the country underwater.
[1] https://www.reddit.com/r/Fantasy/comments/117fq9m/clarkeswor...
(P.S. I can't work out the tuning in the score you posted, but it looks like another user posting above[1] made a tool that provides a fingering -> chord name solver?)
https://ourworldindata.org/uploads/2020/02/Environmental-imp...
As you can see, it specifically points out that the transport aspect pales across the board in comparison with other more important factors.
The idea for future designs is to breed Tritium in the blanket surrounding the vessel. This obviates the need for external sources.
> everything close to the reactor becomes brittle in 2-4 years
I'm no expert on solid state physics, but that seems a little short? JET is more than ten times as old, and as we speak it's in its second run of D-T experiments.
> These are all intrinsic limitations of fusion that fission reactors just don't have
To be clear these are limitations of a specific kinds of fusion reaction and/or reactor design, primarily that of Deuterium-Tritium in a solid-walled tokamak. This may be a nitpick as it's currently far and away the most promising for energy production, and the alternatives are much further from any sort of workable prototype, but I have heard of them undergoing active research: tri-alpha (aneutronic reaction, meaning no activation or embrittlement of reactor components), liquid metal for the walls and divertor (in effect, continuously replacing neutron-bombarded material), etc.
As an example, for the past ten years I have had to browse with a tablet that crashed every time JS was enabled (luckily I could recently justify the expense of a new one, so that won't be the case any more when it arrives)
https://existentialterror.tumblr.com/post/611166753441169408...
I would also add though that if you want to minimize plant death, the best course of action is to stop eating meat and animal products and aim for a plant-based diet, since (by thermodynamics!) the number of plants needed to feed these animals vastly outstrips what would deliver the same amount of nutrients to a human eating them directly.
I don't want to dump on your idea too much. It's very possible there's a kernel of truth to it—I know I have noticed sometimes that people use higher voices (as a whole, rather than a cadence) when they don't want to offend. But I think we would all be better served if we learned to start with questions and calls for discussion, than trying to claim universal truth and quickly being refuted.
Given a finite collection of objects out to a certain radius (stars), relativistic length contraction will compress it along the direction of travel, so an observer looking out from the centre should see the density increase to a maximum when perpendicular to the contracted direction (in a way that's sort of the opposite of synchrotron radiation ending up tightly directed forward and backward). I guess the aberration described in your link will bend this fore-wards from the perpendicular, but it seems like it should still be visible.
It's something I keep quiet about in day-to-day life since it seems to invite reprisal, but if we're soul-searching for what we as individuals can do, I beg you to try eating no meat at all. There seems to be an increasing awareness that animal farming as currently practised is an environmental catastrophe on many levels, including emissions[1]—I dimly recall the IPCC report being quite clear that it's incompatible with a world that isn't ever-worsening, and suspect the obvious conclusion of "stop entirely" has been watered down to "try to eat less" because they fear people will just assume the former is too onerous and not bother.
I have found it to be the opposite—simple steps, fun, healthy—and sort of want to launch into a full tale, but it has been a long week and I was just heading to bed. Still, I'm more than happy later to suggest recommendations and recipes and/or generally chat if you (or anyone) would like.
[1] https://ourworldindata.org/grapher/food-emissions-supply-cha...
VLC also works for me from the start, but seems to lag at higher resolutions, hence fiddling to get DirectShow working.