Slashdot is powered by your submissions, so send in your scoop

 



Forgot your password?
typodupeerror

Comment Re:Insanity (Score 1) 65

Maybe some day we will actually get electricity that is “too cheap to meter” out of it.

That is exceptionally unlikely. All current designs for fusion reactors are complex and expensive to make and, even if you have a magic wand that can produce fusion reactors for almost no cost, they are all going to be large power-station sized facilities unless you also discover some completely new physics and that means expensive transmission lines whose size and hence expense depends very much on the amount of power being consumed.

So unless you also think we will have cheap, room-temperature superconductors as well, or a new way to generate clean, almost limitless power at power in the home, we will be metered for the forseeable future.

Comment Physics (Score 1) 65

Dude that heat energy has to go somewhere.

It does, it radiates away into space. That's why the Earth, which receives over 1.3kW/m^2 in energy from the sun, has not been baked to a crisp over the billions of years it has received such energy: it just wamred up the to point that the rate of radiating energy matched the rate at which the sun adds it. Since the rate of radiation is roughly proportional to the temperature to the power 4, adding additional heat sources to the Earth (especially ones many orders of magnitude less than the power of the sun's heating, has negligible effect on the temperature.

The reason that global warming occurs is because CO2 is very good at absorbing radiation in the wavelengths that objects at the Earth's temperature want to radiate at. This traps heat from the sun by reducing the amount that is radiated until the Earth heats up enough that the new rate of emission overcomes the effect and since the sun's power is many orders of magnitude higher than any human power sources this effect is many orders of magnitude larger than direct heating. For reference the total global power generation was about 3.5 TW in 2024 averaged over the year while the sun's power hitting the earth is about 167,000 TW.

Comment Insanity (Score 1) 65

But expecting fusion to be in production in 7 years is still risky.

It's not risky it's insane. The only way that could possibly happen is if someone came up with a brilliant idea that turned out to be spectacularly easy realize. The problem is that the last ~70 years of fusion research has been filled with the exact polar opposite: brilliant ideas that all looked easy to realize but that all, without exception, turned out to be impossibly hard to make them work.

We'll achieve fusion in the end but expecting it to be 7 years away is insanity - I suspect it is still several decades away at best although nothing would make me happier than to be wrong.

Comment Damn (Score 1) 59

My latest vaccine shots had the 6G upgrade, to take advantage of the higher-speed web access when the networks upgrade, but if they're selling those frequencies to high-power carriers, then I won't be able to walk into any area that handles AT&T or Verizon. :P

Seriously, this will totally wreck the 6G/WiFi6 specification, utterly ruin the planned 7G/WiFi7 update, and cause no end of problems to those already using WiFi6 equipment - basically, people with working gear may well find their hardware simply no longer operates, which is really NOT what no vendor or customer wants to hear. Vendors with existing gear will need to do a recall, which won't be popular, and the replacement products simply aren't going to do even a fraction as well as the customers were promised - which, again, won't go down well. And it won't be the politicians who get the blame, despite it being the politicians who are at fault.

Comment A Different Recent Experience (Score 1) 171

Scene: a queue of customers in a shop. Customer at the head of the queue with a total of $19.10, hands the cashier a $20 note to pay. There is no till just an electronic card reader and a cash drawer.

A frown appears on the cashier's face as the sudden realization that skills learned in their "advanced" maths class will now be called on after years of neglect. They reach for the calculator only to remember that the batteries died this morning and nobody has had a chance to replace them. Concentrating hard finally an epiphany - $19 is just $1 less than $20 so they quickly hand the customer a dollar.

But no, the customer hands it back saying this is too much change. Panic sets in as the cashier realizes that they had forgotten the decimal place! How can they be expected to do university-level maths? They don't have a maths degree! Faint wisps of steam rise from their ears as mathematical machinery deep in their brain rumbles into action straining against the buildup of forgotten Tiktok videos and What's App messages. Finally, seemingly from nowhere comes the answer - it's 90 cents! With a flash of relief the cashier opens the cash draw only to be confronted with 25, 10 and 5 cent coins and a new seemingly impossible puzzle of how to choose the right coins to make up 90 cents....

My takeaway is that given the wonerful level fo maths education we now seem to have, sadly even cash transactions require working technology today.

Comment Re:You Proably would not notice for Petrol Pumps (Score 1) 162

Of course, many gas stations actually have these things called "employees" and sometimes they will put clearly-visible somethings (like a cone) at a downed pump. I see that very rarely, though.

So you do see them! ;-) That's what I was talking about. Yes, the broken rate is probably not quite as high as it is for chargers because pumps have been around for over a century so we have had time to really optimize the design. However, when you are going to a location with 4 chargers and one is broken and the other three are in use you really notice it because you have to wait 30 minutes or so to be able to charge. If that happened at a petrol station you'd just wait a few minutes and use the next free pump without thinking anything of it.

Comment Close but not Quite There (Score 1) 78

Yes, but to be fair typical academic activities of an 80-year old professor don't involve running around while being shot at by Nazis or finding caves with weird alien beings. Instead it involves being called a Nazi because you innocently used what used to be an acceptable phrase and increasingly wondering whether you might be an alien being because nothing around you looks like the world you used to know.

Comment Absolute Salary not Relative (Score 1) 78

But, even for an idealist, it's hard to ignore the salary discrepancy when it gets to a certain point - especially if you have a family.

It's not the discrepancy between academic and industry salaries that matters, it's the absolute value of that salary. That's why I ended up in Canada instead of the UK as an academic - UK academic salaries are not enough to be able to afford a house and support a family on, Canadian ones are. I don't really care what I might have been able to earn in industry because I enjoy my job as an academic too much to want to work in industry. However, I have to have a job that earns enough to afford a house and support my family at a reasonable standard of living - that's my bottom line and the UK salaries for academics are well below that, even up north where I am from and the cost of living is lower.

Comment Re:You Proably would not notice for Petrol Pumps (Score 1) 162

Really? I don't think I have encountered a completely non-working gas pump in at least 10 years.

If you mean that you drove up to one, got out and found it not working then I'd agree with you. But I find it hard to believe that you have never been to a petrol station in the past 10 years that did not have at least one pump that was down for maintenance or refilling the underground tank. The difference is that you probably saw that the pump was blocked off and just went to another without thinking about it like most of us do.

Comment Mass Availability != Mass Distribution (Score 1) 213

I think that means electronic distribution via the internet, social media, television.

The parent did not say "mass distribution", they said "mass availability" and that is not the same thing. Nor did they say anything about electronic distribution so narrowing the definition to only those media you outline has no basis in anything they said.

So minstrels showing up in your village in the middle ages?

....is clearly "mass availability" before electronic communication,

Also, you can't distribute a statue. That's not mass distribution.

No, but it is available for everyone to see so it is definitely "mass availability" of art.

Slashdot Top Deals

"An ounce of prevention is worth a ton of code." -- an anonymous programmer

Working...