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Cake day: July 1st, 2023

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  • dgmib@lemmy.worldtoMemes@lemmy.mlI hate the rich
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    4 months ago

    It depends on the jurisdiction, but in most cases if you have a salaried position with say 3 weeks of PTO but you only take 2 weeks of it. The employer is usually required to pay you over and above your salary for working during your “vacation time”.

    If there’s an unlimited PTO policy, they don’t have an obligation to pay you extra for working during vacation time.


  • dgmib@lemmy.worldtoMemes@lemmy.mlI hate the rich
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    4 months ago

    It’s a lie.

    By making it “unlimited” they don’t need to pay you out of you don’t use all of PTO days.

    If you use it more than they think you’ve earned you get terminated.

    Employees end up afraid of taking their PTO days and typically end up taking even less time off than if they knew there was a expectation of 3 weeks or whatever.




  • Money isn’t the limiting factor though.

    There’s plenty of money waiting to be spent on green electricity projects that’s bottlenecked by grid connections, permitting, panel and turbine manufacturing, rare element supply chains and host of other factors slowing down how quickly we can build new renewable capacity.

    Also the typical LCOE cost comparison approach doesn’t factor in the cost of grid connections, which is lower for a nuclear power plant than it is for an equivalent capacity of renewables. Nuclear is still more expensive on average, but the difference isn’t as clear cut and there a cases where nuclear might be cheaper in the long run.

    Everytime nuclear comes up on Reddit/Lemmy we always seem to argue whether nuclear or renewables is better choice like it’s a choice between the two. Both nuclear and renewables are slam dunk choices compared to fossil fuels on every metric if you factor in even an overly optimistic case analyisis of the financial impacts of climate change. (Nevermind giving considerations of the humanatarian impact.)

    80+% of our planet’s energy still comes from burning fossil fuels. Renewables have been smashing growth records year over year for a long time now and yet we haven’t even reached the point where we’re adding new renewables capacitiy faster than energy demand is increasing. We’re still setting new records annually for total fossil fuel consumed. Hell we haven’t even gotten to the point where we stopped building new Coal-fired power stations yet.

    The people who argue that “we don’t need nuclear, renewabes are cheaper and faster” you’re missing the reality of sheer quantity of energy needed. We can’t build enough new renewables fast enough to save us regardless of how much money is invested. There aren’t enough sources of the raw materials needed to make that happen quickly enough, we can’t connect them to the grid quickly enough, we cant build new factories for solar panels and wind turbines fast enough. Yes, we will undoubetly continure to accelerate our new renewables projects at a record setting paces each year but it’s not enough, it’s not even close. Even our most optimistic , accelerated projections don’t put us anywhere close to displacing fossil fuel consumption in the next 10-20 years.

    We need to stop arguing over which is better. We need to do it all.


  • Not sure where you’re getting 250kwh/m2/year from. If it was one contiguous solid panel maybe you could achieve that and then you’d be correct it would be about 560,000 km2. Or roughly the size of France.

    But you need to leave space between the panels in a solar farm for them to be at the optimal angle without casting shadows on each other. Real world solar farms have much lower density than that.

    The density can vary significantly, our hypothetical solar island could be anywhere from the 6th to the 50th largest country but regardless we’re still talking about something in the area of a trillion individual solar panels.

    Assuming money isn’t the limiting factor (which it isn’t in most countries) we don’t have anywhere close to the ability to manufacture and deploy that many panels by 2030 or 2035.

    Assuming we maintain exponential growth of both wind and solar (doubtful) we’re still a least two decades away from eliminating fossil fuel electricity generation never mind meeting the 2-3x generation capacity needed to transition transportation and other consumers of fossil fuels over to electricity.

    Renewables growth has shattered estimates before, you never know, but the transition is not happening any where near as fast as people seem to think.



  • 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.


  • 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.



  • Yes you’re correct. I will qualify my previous statement as hydrogen powered road vehicles don’t make sense for now.

    The problem at the moment is that electricity generation is not carbon free and in most countries not even close.

    Unfortunately the transition to a carbon free electric grid is being significantly retarded by policymakers that are, as you say, myopic. As a result it will be at least two more decades before hydrogen makes sense.

    The carbon footprint of lithium battery manufacturing, is small compared to the carbon footprint of electricity generation. Until that changes significantly lithium batteries will continue to be a better choice than hydrogen fuel cell.

    Hydrogen may make sense in a future where we’ve eliminated all fossil fuel electricity generation and there’s an abundance of carbon free electricity that can be used to create green hydrogen as a form of energy storage. Though by the time that point comes, we may have developed battery technology or some other energy storage technology that doesn’t carry the same carbon footprint that lithium ion does today.


  • Hydrogen doesn’t make sense and never did as a strategy to reduce greenhouse gas emissions in vehicles.

    Most hydrogen is made from fossil fuels, and has a lot of emissions during manufacturing. But even green hydrogen, which is made by using carbon free generated electricity to split water into hydrogen and oxygen doesn’t make sense.

    If you’ve build new renewable power it’s more efficient to use it to charge batteries than to use it to generate hydrogen.

    There might be a case for compressed hydrogen, In vehicles where batteries are too heavy like aircraft.

    But for road vehicles, batteries are more effective at reducing emission.

    If you’re building any new renewable power, you’ll reduce more emissions by using it to displace coal power, the to generate green hydrogen.

    Some day when we’ve eliminated fossil fuel based electricity generation, Green hydrogen might start to make sense. But anybody trying to do it right now is not being as helpful as they could be.




  • It’s called home realm discovery. It’s common in business apps though it’s usually used with email & password logins not username & password logins.

    It’s done that way to support federated logins. Larger companies will often used a single sign on solution like Okta or Azure AD. Once the user’s email address is entered it checks the domain against a list of sign on providers for each domain and redirects the user to their company’s federated login if it finds it there instead of prompting for a password.

    This has several benefits:

    1. The user doesn’t have mutiple passwords to remember for different apps. Which is know to result in users either reusing passwords or writing down passwords somewhere.

    2. When an employee quits or is terminated the company only needs to disable their account in their company directory and not go into potential dozens of separate web apps to disable accounts.

    3. The software vendor never receives the password, if the vendor’s system is compromised they don’t even have password hashes to leak. (Let alone plain text or reversibly encrypted passwords)

    Websites that work that way are (usually) doing it right. If that doesn’t work with your password manager, you should (probably) blame the password manager not the website.


  • Reddit never expected the new api pricing to be a fountain or money. This was never about LLMs or the lack of ad revenue.

    If it was just about LLMs they could have made one price for api users that were primarily harvesting data and a different price for api users that contributed significant content or moderation. Which would make good business sense to do so as content contributors are what bring the eyeballs (and therefore the value) to the platform.

    It wasn’t about ad revenue either, by all estimates the revenue from a third-party app user would have been many times more than the opportunity cost from the ad revenue they were missing out on from 3rd party app users. If they wanted to profit from the api pricing, they only needed to give the community more time to transition business models. They didn’t even need to give everyone more time, just a dozen or so major third party apps.

    This was always about killing off the third party apps. The ones they let survive had low user counts to begin with and went even lower.

    I don’t know their real motivations here but so far there’s only two possibilities that i can think of.

    A) Reddit’s leadership and board of directors are beyond incompetent

    B) They collect significantly more data from the first party app than they were able to from the third party apps, and they’re selling that data for a significant sum of money beyond just their own ad ecosystem.


  • The challenge with green hydrogen is it needs to be created using green electricity. If the electricity isn’t green you’re still burning fossil fuels to create it. Creating hydrogen from fossil fuel generated electricity and then burning it is less efficient than just burning fossil fuels directly and results in a net increase not decrease in carbon emissions.

    As we build additional green electricity generation, it’s currently more impactful to use that to lower grid demand on fossil fuel generated electricity than to use it make green hydrogen. If it’s used to make green hydrogen instead, we’re only delaying the day we finally eliminate fossil fuel electricity generation, which again benefits the fossil fuel industry.

    Only at some point in the future, when we’ve completely eliminated fossil fuels from the electric grid, and have created an excess of green electricity generation does green hydrogen even become possible to create.

    And even assuming we can achieve that some day. It’s less efficient to use electricity to create hydrogen to power vehicle than to use batteries. Anything that can be converted to connect to the grid directly or run on batteries is better doing that than running on hydrogen.

    It’s not completely crazy… there are some potential use cases for green hydrogen that would make sense in some theoretical future where there’s an abundance of green electricity generation, allowing replacing of fossil fuels where more direct forms of electrification isn’t viable. Aircraft in particular come to mind here since hydrogen stores much more energy per kg than batteries, which are currently too heavy to be viable in aircraft.

    But almost all promotion of hydrogen today, including green hydrogen, is either more greenwashing by the fossil fuel industry or the work of well meaning idealists that have unwittingly become their shills.

    Green Hydrogen is not a solution for the vast majority of things it gets presented as a solution to.



  • dgmib@lemmy.worldtoMemes@lemmy.ml6÷2(1+2)
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    1 year ago

    I concur with everything you’ve written here.

    I concur that a left-to-right interpretation of consecutive explicit multiplication and division is wide spread and how most calculators and computers would interpret:

    a / b * c.

    But the sources you quote in your blog post and the style guides I’ve read, state that a fraction bar or parenthesis should be used to clarify if it should be interpreted as:

    (a / b) * c

    or

    a / (b * c)

    You make the argument in your post that:

    a / bc

    is ambiguous (which I agree with)

    but

    a / b * c

    is not ambiguous. Which is the part I disagree with, and I think the sources you quoted disagree with you as well. But I’m open to being wrong about that and am interested if you have sources that prove otherwise.

    If I’m understanding your response correctly, you believe that

    a / b * c

    is unambiguous, and always treated like

    (a / b) * c

    because of a wide spread convention of left-to-right interpretation (a convention that we both agree exists), not because you found a source that states that.

    Anyhow… I’m not out to convince you of anything and I appreciate you taking the time to explain your thinking to me.