dgmib

joined 1 year ago
[–] dgmib@lemmy.world 3 points 3 hours ago

The economics of Bitcoin mining at scale force it to find an equilibrium where the cost of mining a Bitcoin is just a bit less than the current market value of a Bitcoin.

Electricity is the only significant variable cost at scale so the amount of electricity needed to mine a bitcoin ends up being a little less than however much a bitcoin can buy.

Thus one can estimate the total amount of electricity very accurately by simply taking the block rate (6/hr) times the block reward (~6.25 BTC) times the current price of a bitcoin divided by the wholesale price of electricity. You’ll get the upper bound for the amount of electricity being consumed.

Which by the way works out to around a TWh costing tens of millions of USD every single day. Which is more electricity than a small country

The only thing that will stop the waste is if the price of bitcoin drops. You can legislate it away, that won’t stop it, it will just move when it’s happening.

[–] dgmib@lemmy.world 2 points 1 day ago

Yea basically the main contamination issue is that radioactive substances were spread around. Contamination of the surrounding area isn’t the only issue we have to deal with, nor is it the most serious, but it is generally is the most costly remediate.

The contamination problem is caused by radioactive matter spewed into the air and settling on the trees, buildings, ground etc… in the surrounding area.

The main remediation strategy is to remove everything in the surrounding area including the top ~3 ft or so of soil of the and haul it off to an underground landfill to slowly decay for at least a few hundred years safely separated from humans.

[–] dgmib@lemmy.world 7 points 3 days ago (1 children)

Lots of great answers here.

I think one under mentioned cause is the effect of social media algorithms.

All major social media platforms use machine learning algorithms decide what to show in your feed. The algorithms are programmed to show you the things that have historically kept you on the site longer.

It’s human nature to upvote/read/support/engage with the things that agree with our world views, and downvote/dismiss/disengage/discredit the things that disagree with our worldview.

These two facts combined result in you seeing more of the content that aligns with your worldview, and more of the content from people who share your worldview. We’re all funnelled into communities of like minded individuals that repeat what we already believe, reinforcing whatever that is regardless of how factually correct it might be.

Dissenting information that might cause you to reconsider your position or become more politically aware is automatically filtered out.

And it’s not just social media either, even the algorithms behind search engines display this behaviour.

Long before social media existed, Google was tailoring search results to match the things you tend to click on. If you searched for news and typically clicked on the headlines biased towards one side or the other Google would start ranking site with that bias higher.

This wasn’t intentional (at least not originally) it was just a side effect of the algorithm, trying to figure out what you were most likely looking for.

For someone who, for example, believes the Earth is flat. If they were to type “is the Earth flat?” Into a search engine. They are much more likely to get results that “prove” the Earth is flat, then a person who believes the Earth is round, because the algorithm knows that they tend to click on articles that “confirm” the earth is flat.

Algorithms used by social media and search engines today, make it genuinely difficult to maintain a balanced worldview and find unbiased answers to any question. They are all designed to keep you engaged, And it is human nature to engage more with the things we agree with, regardless of truth.

[–] dgmib@lemmy.world 4 points 4 days ago

The old 8” floppy disks were more expensive but known for being incredibly reliable.

The newer 5.25” and 3.5” floppies used cheaper and mass produced coatings on the magnetic surface, plus the smaller and higher density tracks had less surface area per byte and less material to hold the signal.

The net result was the newer floppies often couldn’t be reliably read after a few years of use.

It’s not at all surprising they stuck with the more reliable system for so long.

[–] dgmib@lemmy.world 3 points 5 days ago (1 children)

My mom used to describe a solution to a problem that worked well as “slicker than snot”

Used that phrase in a work meeting once when I was younger and got the most eclectic mix of reactions ranging from, “ think I’m going to vomit” to full on LOLs.

[–] dgmib@lemmy.world 2 points 1 week ago* (last edited 1 week ago)

No.

MW is the maximum capacity not the average.

A nuclear reactor runs at close to its maximum output pretty much 24/7/365.

A solar farm only operates during the day, and even then it only operates at maximum output in the middle of a clear sunny day.

The overall average output of a nuclear plant is typically around 90% of its capacity.

The overall average output of solar farm is 20-25%.

This massive farm will still only output a bit more electricity than what a single nuclear reactor outputs.

A nuclear power station typically has more than one reactor, so compared to a typical nuclear power station this isn’t even close to the average nuclear plant.

Though it does beat a few of the smallest nuclear plants that only have a single reactor.

Nuclear outputs a fuck-ton of electricity for its size.

[–] dgmib@lemmy.world 83 points 2 weeks ago (7 children)

Sandford Fleming (the guy who invented time zones) actually made it easier.

Before timezones, every town had their own clock that defined the time for their town and was loosely set such that “noon is when the sun is at its highest point in the sky.” Which couldn’t be measured all that accurately.

If it wasn’t for Fleming, we’d be dealing with every city or town having a separate time zone.

[–] dgmib@lemmy.world 1 points 2 weeks ago

There’s a manual release that can be used to open the hood from the outside even if the vehicle has no power.

It’s a safety feature for first responders, as also under the hood is a loop of wire that can be cut to permanently disable the high voltage curcuts prior cutting open the car with saws.

[–] dgmib@lemmy.world 6 points 2 weeks ago (2 children)

There is a manual door release that works without power, but only from the inside. She had just loaded the child in their car seat, shut the door then went to the driver door to get in and couldn’t open it.

The doors are on the 12V side of the system, you can use jumper cables to connect an external battery from another vehicle (including ICE vehicles) to power the door under normal circumstances. But with a kid trapped in the car in AZ, I wouldn’t wait for that either.

It a pretty rare combinations of circumstances, but there’s something to be said for manual keys still used on other vehicles with keyless entry.

[–] dgmib@lemmy.world 1 points 3 weeks ago

Most large corporations’ tech leaders don’t actually have any idea how tech works. They are being told that if they don’t have an AI plan their company will be obsoleted by their competitors that do; often by AI “experts” that also don’t have the slightest understanding of how LLMs actually work. And without that understanding companies are rushing to use AI to solve problems that AI can’t solve.

AI is not smart, it’s not magic, it can’t “think”, it can’t “reason” (despite what Open AI marketing claims) it’s just math that measures how well something fits the pattern of the examples it was trained on. Generative AIs like ChatGPT work by simply considering every possible word that could come next and ranking them by which one best matches the pattern.

If the input doesn’t resemble a pattern it was trained on, the best ranked response might be complete nonsense. ChatGPT was trained on enough examples that for anything you ask it there was probably something similar in its training dataset so it seems smarter than it is, but at the end of the day, it’s still just pattern matching.

If a company’s AI strategy is based on the assumption that AI can do what its marketing claims. We’re going to keep seeing these kinds of humorous failures.

AI (for now at least) can’t replace a human in any role that requires any degree of cognitive thinking skills… Of course we might be surprised at how few jobs actually require cognitive thinking skills. Given the current AI hypewagon, apparently CTO is one of those jobs that doesn’t require cognitive thinking skills.

[–] dgmib@lemmy.world 0 points 5 months ago

The economics of Bitcoin mining are a bit weird in that it impossible to make it more energy efficient.

The system auto adjusts the computational complexity of mining bitcoin so that it always costs a little less than one bitcoin to mine a bitcoin, and at scale the only variable expense is electricity so as the price of bitcoin goes up, so does the amount of money that must be spent on electricity.

Current 6.25 Bitcoin are mined every 10 minutes. So globally about $2 million must be spent on electricity every hour.

In a little over 2 months the block reward cuts in half to only 3.125 bitcoin every 10 minutes. That will have the side effect of reducing the money spent on electricity for mining bitcoin so long as the price of bitcoin remains the same.

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