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vikingerik

2,633 karma · joined May 16, 2021

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vikingerik··on Once Claude can measure something, it can make it faster
Like the AI that was developed to play Tetris as long as possible. It succeeded by... pausing the game.
vikingerik··on Data collected by cars and sold to third parties
All it would need is a wi-fi antenna internally, and then it could connect to an open wi-fi network anywhere. And it's going to be pretty much impossible to avoid ever driving your car within range of some open network.
vikingerik··on We've flown a radiation-blocking vest to the Moon and back, and it worked
And just for comparison on that number, the entire Apollo spacecraft (command+service+lunar modules) was about 50 tons to lunar orbit. And that took a gigantic Saturn V to launch.
vikingerik··on 50k Boat Names
Right. Although in-universe, it was the NX-01 that was the genesis of the name for starships. NCC-1701 was a century later.
vikingerik··on 50k Boat Names
There's a fun time loop here: The Star Trek Enterprise and the real-life space shuttle Enterprise were each named after the other. In real life, the shuttle was named after the Star Trek ship. In-universe, the first starship Enterprise (NX-01) was named after the space shuttle. [Edit: I remember reading that years ago, but can't find any official source saying so now, although the intro to the Star Trek Enterprise tv series does emphasize the shuttle.]

(Of course, both really come from a long lineage of naval vessels with the name.)

vikingerik··on Astronomers may have found the first exomoon
The definition isn't fuzzy, we define a brown dwarf as an object that has undergone deuterium fusion.

The fuzziness is in the physical properties needed to achieve that. 13 Jupiter masses is generally the threshold where deuterium fusion starts, but that can vary: a brown dwarf composed of only primordial H and He would need a bit more, while one with some heavier elements from previous generations of stars will be denser and need slightly less. Rotation speed also matters: a faster rotator will experience centrifugal force and thus have less interior pressure.

And there is fuzziness in what we can observe, so sometimes we're not sure if an object is a brown dwarf. We may not know its exact mass and composition, and we might not be able to tell if it's radiating energy from deuterium fusion, or just from gravitational compression, or (in a binary system) if it's just reflecting light from its companion star.

vikingerik··on Astronomers may have found the first exomoon
The other reply gave good info, but didn't quite answer this. Once an object's core acquires enough temperature/pressure/density to start protium fusion, it will continue, not burn out. The fusion itself increases the temperature, and the produced helium is denser than hydrogen, so the core compresses more under gravity thus increasing the pressure too. So protium fusion creates its own conditions to continue, so there's no such thing as borderline stardom; once protium fusion starts at all, it will continue and it's now a red dwarf. Fusion doesn't begin or occur everywhere, it's still only at the core, but convection will eventually (10^12 year timescale) cause all the hydrogen to have moved through the fusing region.
vikingerik··on The art and engineering of Sega CD Silpheed
Summary:

It's low resolution at only 256 x 80, stretched vertically to the screen size.

It's only 16 colors so only 4 bits/pixel.

That comes to 10kb per frame.

A variant of Huffman coding gets it to 3.52kb per frame.

It's at 15 fps and is 12.5 seconds in length.

15 x 12.5 x 3.52kb = 660kb, which fits in a 4mb cartridge.

There is dithering to give the appearance of more colors, and it's done in vertical stripes rather than checkerboards because that compresses better. Then at runtime, every other scanline is offset by 1 pixel, and in opposite directions every other frame, so the dithering blurs back together to give the appearance of many more colors.

vikingerik··on Beavis Ultrasound PnP ISA Sound Card Replica
Second Reality was art indeed, but the GUS didn't make all that much difference for it. The soundtrack didn't have higher rate samples for the GUS's memory to hold or more channels for it to mix. Later demos and games did use these capabilities, but for Second Reality, the GUS sounded just about the same as a 16-bit Sound Blaster.
vikingerik··on Bonnie Tyler has died
Did you know there's a long version? (Of the song, not the flowchart, though another reply has that too)

https://www.youtube.com/watch?v=Svz-W5w2bPM

There's a 7-minute version, with two more verses that aren't in the version you always hear on the radio. The one starting at 3:45 in that video is particularly powerful and chilling.

vikingerik··on My quest to see all of Tetris
Best is subjective there, of course. Tetris is proven solvable with that bag method. https://tetris.wiki/Playing_forever

20 cycles through the bag can be packed into exactly 56 lines and that pattern can be repeated forever. Such a solved game might not meet everyone's definition of best. Although for casual play it's great to have every piece coming regularly.

vikingerik··on A New Catalog of Stellar Rotation Periods for over a Million Stars
https://en.wikipedia.org/wiki/Stellar_rotation doesn't say anything about bimodal. There's a formula with a relation between size and rotation speed, including the fact that smaller stars live longer and have more time to spin down, but it's nearly monotonic. Stars spin down because of their magnetic field exerting torque on their stellar wind, an effect that's much larger than any transfer of angular momentum to planets.
vikingerik··on The Egg Bandits Made a Thousand Times the Fine They Just Paid for Price Fixing
Consumers don't want to understand it because they don't want to consume less.
vikingerik··on CERN bids farewell to the LHC and enters Long Shutdown 3
The article says "10x luminosity", and here's what seems to be the explanation.

https://en.wikipedia.org/wiki/High_Luminosity_Large_Hadron_C...

That's the wiki article for the new one. Says "Increasing LHC luminosity involves reduction of the beam size at the collision point, and either the reduction of bunch length and spacing, or significant increase in bunch length and population."

The linked article says the new one will have "between 140 and 200 proton–proton collisions in every bunch crossing, compared to around 60 during the last LHC run." So the "10x luminosity" seems to be composed of ~3x more protons at a time along with presumably a ~3x tighter focused beam.

vikingerik··on How H-E-B became Texas' most beloved brand (2024)
Publix is also on that first list, of happy and overstaffed and privately owned. I do most of my shopping there and it's much more pleasurable than Kroger or Walmart.
vikingerik··on Sealed Super Mario Bros Sells for $3M Setting New Record for a Video Game
The rarity is that very few copies ever existed of a standalone boxed SMB.

Not every console came with SMB. One very early package didn't have it, and one later package included SMB3 instead. So SMB was sold as a standalone for these cases, but very few units were needed or extant.

vikingerik··on Field of clones: How horse replicas came to dominate polo
Well, if there are 100,000 competitors and you want to win, then the 99.99th percentile isn't enough, and yes you would try to reach 99.999.
vikingerik··on The four programming questions from my 1994 Microsoft internship interview (2023)
Right, iterating through pixels is better. The tricky part about iterating the angle is that you need to choose the step size correctly or else you could skip pixels. Like if you iterate in 1-degree increments, you'll plot 360 pixels total, but the size of the circle on your canvas might be more than 360 pixels wide. I'm sure there's a way to choose the angle iteration step size to guarantee not skipping pixels, but you'd often duplicate work and re-plot the same pixel twice.

So yes, start at (R, 0), increment the y-coordinate each time and possibly decrement the x-coordinate, until x=y which will be at 45°. If the circle's center is an integer on the pixel grid, you can reflect/translate each pixel in that first octant to all eight as you go. If the center is fractionally positioned, you'd have to calculate it all the way around, iterating primarily on y or x depending on the location.

vikingerik··on The real cost of owning a home
Yes, this is broadly correct. The free market will (roughly) arbitrage out any differences between owning and renting. The hidden factor is that whatever money you have in house equity represents opportunity cost that it isn't in investments. If you have 400k in a house and the stock market returns 6% over inflation, then the opportunity cost is 2k per month in interest, which is comparable to what you'd pay in rent.

There are tax advantages that favor owning (in the US), for a primary resident and not an arbitrageur - mortgage interest and capital gains when you sell are not taxed, while capital gains in a non-retirement account are.

You can gain by appreciation and leverage, of course - but you can just as easily not, you don't know if your city is going to be the next high-flying Austin or Boulder, or run-down Detroit. My own house has been flat in estimated value for four years in an area that I thought would continue to rise.

vikingerik··on Hengefinder: Finding when the sun aligns with your street
Any angle within 23º of east-west will have henging at some time of year. You'd have to have the entire street grid be aligned diagonal rather than cardinal.
vikingerik··on Magic the Gathering format: Fun 40
Love that "land for turn", although I think it might shift the balance a little too much, in that you can make a deck with too much land and high cost spells and know you can cast them reliably. There needs to be a risk factor in building up to high mana to make low mana spells matter.

Possible tweaks, maybe it has a cost (all lands have cycling 1 or 2 mana or life.) Or delay that draw until end of turn, which feels like about the right power level, but does have memory and execution issues.

vikingerik··on Why is almost everyone right-handed? A new study connects it to bipedalism
I think this reason is dependency. Anything I'm doing where the action of one hand depends on the other has to go left-to-right. I can only finger frets with the left and then pick with the right. Can't go the other way, can't have the right hand act before the left, even if the left has the more complex task.

It's like Super Mario Bros. With a 4-way d-pad and 2 action buttons, why is the more complex 4-way on the left? Because most of the time you're holding a direction first with less requirement for precise timing, and then pressing the button at the correct instant depending on the movement. (We're talking general platformer play, not hyper precise d-pad moves for something like Super Metroid speedrunning.)

Even typing on a keyboard, I never hold a right-side shift or other modifier key, it's always left-shift then the target key.

vikingerik··on I love Linux, but I can't quit Windows
On MacOS (at least my older version on a 2015 MBP), Cmd-~ switches between app windows. Totally undiscoverable but knowing that restores a lot of usability.
vikingerik··on The greatest shot in television: James Burke had one chance to nail this scene (2024)
I've always thought he just kind of slurred over the "a", like you'd do in casual speech, it came out like "f'r'a man". In the recording there's a tiny slight bit of a vowel after the "r" sound. I don't think he blew the line, just didn't speak it clearly.
vikingerik··on Space Cadet Pinball on Linux
Several real pinball tables do this, keep a hidden ball staged to make it seem to instantly reappear. The Rick & Morty machine in particular does this - you can shoot into a portal, and the ball (actually a different hidden one) reappears instantly some distance away.
vikingerik··on Space Cadet Pinball on Linux
And the version from Full Tilt is a significantly enhanced version of the game. It has multiball, where the Windows bundled version doesn't.
vikingerik··on I want to live like Costco people
Most likely that pricing rule was/is at a more local level. The national level in the US doesn't have anything like that, but there are some states or cities or counties that can and do.
vikingerik··on Boris Cherny: TI-83 Plus Basic Programming Tutorial (2004)
Hey, some of us are old enough to have done it on a TI-82 instead!

I already knew Basic from a DOS PC, but did write a Breakout clone while bored in classes on my TI-82.

vikingerik··on Ted Turner has died
The Onion headline should be: Ted Turner dies at 87:05
vikingerik··on Nuclear receptor 4A1 linked to health effects of coffee: study
Just Wikipedia. It cites two studies that found values of 8-13 mg and 3-32 mg per decaf cup, compared to regular which is 95-200. https://en.wikipedia.org/wiki/Decaffeination
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