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dgmib

@ dgmib @lemmy.world

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3 yr. ago

  • Deleted

    Samsung TVs will get 7 years of updates, starting with 2023 models

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  • Genuinely curious, what new features did that updated firmware have that were valuable to you?

  • Green Hydrogen To Be Featured In World’s First Nationwide “Hydrogen Valley”

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  • “Green Hydrogen” is made by using electricity to split water into hydrogen and oxygen. There’re no carbon emissions in that process, but to be truly “green” the electricity must come from a carbon free source like wind, solar, nuclear, or hydroelectric.

    The process of electricity to hydrogen to compressed hydrogen to fuel cell to electricity is about half as energy efficient as electricity to li ion battery to electricity. As a form of electricity storage green hydrogen is significantly less efficient than batteries.

    Green hydrogen only makes sense as a fuel in situations where batteries are not feasible.

    And right now making green hydrogen at all does not make sense because if you build a new low carbon source of electricity it will make a larger impact if you use it to displace fossil fuel based electricity generation rather than using it to create green hydrogen.

  • LGBTQ advocates say Mormon church's new transgender policies marginalize trans members

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  • Hold a gun to someone’s head and they’ll do pretty much anything you say because they believe their life depends on it.

    Morman’s preach that your eternal life depends on being part of their group. So for a transgender person who’s been brainwashed by the church, it’s like having a gun to your head. They don’t want to be in a group that hates them, but they’re afraid “god” will kill them of they leave the group.

    They live in terror of being excommunicated (kicked out of the church) because they’ve been convinced that is equivalent to death. The amount of power that gives church leaders over the lives of the followers is staggering, and of course ridiculously abused.

  • Maria Branyas Morera, the world's oldest person, dies at age 117

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  • Amazing. I heard she also held the record for the youngest person alive at one time.

  • Harris Energizes Democrats in Transformed Presidential Race

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  • The thing I’m noting is not the part about Harris’s rising approval, but that it has increased the percentage of Trump supporters who are say they are “extremely motivated to vote” to 72%.

    Approval ratings don’t matter if one side has a larger percentage of its voters actually voting.

  • Top Trump donor 'stunned' after he lashed out at her in a series of 'angry texts'

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  • There will definitely be someone trying to take his place.

    But I’m old enough to remember the last 7 republican presidents and presidential nominees. None of them were like Trump.

    They weren’t convicted felons, or impeached twice, or telling bold provably false lies daily. They didn’t double down on their lies when called out on it.

    Some of them couldn’t find a coherent sentence without two hands and a flashlight but went on to be elected for two terms, while still managing not to recommend injecting bleach as a treatment for any medical condition.

    Trump has something no Republican candidate in my lifetime (and probably ever) has, blind loyalty in the face of utterly ridiculous behaviour.

  • Samsung’s 20-year-life EV battery runs 600 miles on 9-minute charge

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  • Your math checks out.

    Charging a 600 mi battery in 9 minutes would require a charging station that can output somewhere north of 1.2 MW.

    We need major upgrades to the electrical grid as well as doubling our electricity generation capacity for charging stations and vehicles like that to be common place.

  • Wind and solar energy overtake fossil fuels to provide 30% of EU electricity

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  • It's not like the country was massively relying on nuclear energy at any point in time really.

    Germany’s 17 nuclear reactors were generating almost 30% of its electricity a decade ago before they started phasing them out. It was their second largest source of electricity after coal.

    Despite having built literally 100s of solar and wind farms in the past decade they still had to increase their coal output by 40 TWh to make up for the gap. A nuclear reactor generates a fuck ton of electricity.

    And for what? Statically speaking 800x more people are killed in coal mining accidents per TWh generated than are killed by all nuclear power accidents combined. They phased out their largest source of carbonless electricity and the decision likely killed more people than would have died even if there was a nuclear accident.

  • Would you wear a body cam at work?

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  • I bought a dashcam for my vehicle, and choose to use it to protect myself from false accusations.

    Body cams should be like dash cams, something used by employees to exonerate the person wearing them.

    I’m not a LEO, and I can respect that maybe it’s not this simple.. but I would expect “honest” cops to voluntarily wear one to protect themselves from false accusations of abuse of power.

    But when it crosses over from protecting the employee to big brother watching over you that’s the line.

    Body cams used to protect the wearer - Good Body cams used to punish the wearer - Bad

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  • I remember a time when ads weren’t crazy intrusive. They weren’t being shoved into every os and app and website.

    There wasn’t 20 of them on every page, and advertisers weren’t trying to harvest my data to the point where they knew every last detail of my personal life.

    And I didn’t mind having them in order to have “free” content. But they got greedy and now I’ll block them in every chance I get.

    Maybe forcing ads into everything isn’t the answer.

  • Wha..?

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  • I feel genuinely bad for any democrat supporter with an ear injury right now.

  • US Government Launches New Attempt to Gather Data on Electricity Usage of Bitcoin Mining

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  • You’re not wrong.

    Wholesale prices do bounce around significantly in a day, occasionally even going negative. And some miners do shutdown for brief periods during high demand due to a high electricity price. Some miners aren’t buying electricity from the grid, and have their own generation sources with different economic inputs. And there’s lots of day to day volatility in mining rates that has nothing to do with economics.

    There’s no formula or methodology that could tell you how much energy is being wasted at any given moment. That impossible. There’s no way of knowing how many miners are operating globally at any given point in time. We can’t even reliably tell which country a block was mined in. We can only make reasonable estimates of global averages over the last few weeks.

    You can get closer with more detailed modelling, but the equation I gave using global averages for bitcoin and electricity prices in the last few weeks will get you to an accurate estimate.

  • US Government Launches New Attempt to Gather Data on Electricity Usage of Bitcoin Mining

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  • Yes somewhat.. the formula has several factors that are constantly in flux, Bitcoin mining is a random process the value can be off entirely by chance. But it’s designed to self-adjust over the long run towards that formula, individual fluctuations cancel out in the long run.

    For electricity price specifically, wholesale prices of electricity tend to be fairly close everywhere bitcoin is mined. Bitcoin mining is more profitable where electricity is the cheapest and is uneconomic in places where the price of electricity is above average. So it only happens where the wholesale price is globally competitive.

  • US Government Launches New Attempt to Gather Data on Electricity Usage of Bitcoin Mining

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  • 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.

  • What's something that seems obvious within your profession, but the general public seems to misunderstand?

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  • 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.

  • German Navy to replace aging 8-inch floppy drives with an emulated solution for its anti-submarine frigates

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  • 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.

  • What family sayings did you think was universal?

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  • 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.

  • China is building a mammoth 8 GW solar farm

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  • 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.

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  • 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.