Recent comments in /f/todayilearned
electronp t1_j7npxki wrote
Reply to comment by vanelle01 in TIL that physically acting out your dreams (loss of REM sleep paralysis) is >80% accurate at predicting future brain maladies including Parkinson's, Lewy Body Dementia, and ALS by SimilarLee
That's good. Terror is no picnic.
AKADriver t1_j7nord6 wrote
Reply to comment by ____Theo____ in TIL the first Blue LED wasn't commercially available until 1989 and bright blue LEDs weren't available until 1993. by j-merc23
I'm surprised it has LEDs. The indicators that look like red LEDs in my '93 Nissan are all tiny bulbs, even though red LEDs had existed for a while.
rockmsedrik t1_j7njjtm wrote
Reply to comment by leoleosuper in TIL the first Blue LED wasn't commercially available until 1989 and bright blue LEDs weren't available until 1993. by j-merc23
Ah yes, the touch-n-feel method, I too have stubbed my toe a few too many times!
leoleosuper t1_j7niqac wrote
Reply to comment by rockmsedrik in TIL the first Blue LED wasn't commercially available until 1989 and bright blue LEDs weren't available until 1993. by j-merc23
Learn how to go to the bathroom without sight. Helps a lot.
dmcanall59 t1_j7nfm0j wrote
vanelle01 t1_j7ndv09 wrote
Reply to comment by electronp in TIL that physically acting out your dreams (loss of REM sleep paralysis) is >80% accurate at predicting future brain maladies including Parkinson's, Lewy Body Dementia, and ALS by SimilarLee
Oh yeah I know it was sp, got to excited about the whole thing happening.
However I did not feel “heavy weight on my chest” this time.
I’ve had multiple sp experience’s in the past, which where right out terrifying tho. This one not so much.
____Theo____ t1_j7nd2j0 wrote
Reply to TIL the first Blue LED wasn't commercially available until 1989 and bright blue LEDs weren't available until 1993. by j-merc23
Always wondered why my 1983 VW van’s instrument cluster has different colored LEDs for various indicators, but a white lightbulb with a blue cap for the high beam indicator.
majinspy t1_j7ncsbe wrote
Reply to comment by ITeechYoKidsArt in TIL about Rob McKuen, the bestselling poet in American history who sold 60 million books and 100 million records but is all but forgotten today by SAT0725
I really expected a nasty turn but...this Rod guy seems like a cool dude.
CustomHW t1_j7ncih3 wrote
Reply to TIL about Rob McKuen, the bestselling poet in American history who sold 60 million books and 100 million records but is all but forgotten today by SAT0725
This really reinforces my belief that no matter what you accomplish, everyone will eventually forget you. It's family that really matters. All the other peripheral stuff (career, money, esteem, etc.) is just noise. I would gladly trade all of it in for just one more hour with my lost loved ones.
CrypticHandle t1_j7nbepf wrote
Splice1138 t1_j7n8hfi wrote
Reply to comment by Couldbehuman in TIL the first Blue LED wasn't commercially available until 1989 and bright blue LEDs weren't available until 1993. by j-merc23
The page I read it on might have been simplifying things, not saying that's exactly how it's implemented. I do know if you play around with subsampling RGB chanels via Photoshop, for example, blue is the least noticeable, red somewhat, green very noticeable.
BeatlesTypeBeat t1_j7n6u8y wrote
Reply to comment by Thelgow in TIL the first Blue LED wasn't commercially available until 1989 and bright blue LEDs weren't available until 1993. by j-merc23
Because it was new and cool!
gk99 t1_j7n356x wrote
Reply to comment by TrumpterOFyvie in TIL the first Blue LED wasn't commercially available until 1989 and bright blue LEDs weren't available until 1993. by j-merc23
There's a movie theater where I live that chose to make its menu all bright blue LEDs and it's almost literally impossible to read.
rockmsedrik t1_j7n1326 wrote
Reply to comment by RockItGuyDC in TIL the first Blue LED wasn't commercially available until 1989 and bright blue LEDs weren't available until 1993. by j-merc23
Agreed, best to have forms of RF away from sleep spaces, current situation has a single room for both work and sleep, so black out curtness, sound absorbing wall blankets, and blacking out all BLUE LED's on things. Even the RED LEDs on power strips are too bright now. Have to tape over them as well.
Thankful to Lévoit Air purifiers for having the option to TURN OFF the LED panel. Also thankful to Govee humidifier for having a "LED panel brightness, and schedule on and off" settings.
More electronics need to think about the brightness in dark rooms. Light pollution is a ongoing battle.
positivecynik t1_j7n09g3 wrote
Reply to comment by ItDoesntMatter59 in TIL the first Blue LED wasn't commercially available until 1989 and bright blue LEDs weren't available until 1993. by j-merc23
I was 13 lol
shodan13 t1_j7myr8f wrote
Reply to TIL the first Blue LED wasn't commercially available until 1989 and bright blue LEDs weren't available until 1993. by j-merc23
Fucking quantum physics man.
malektewaus t1_j7mwx2i wrote
Reply to comment by SAT0725 in TIL about Rob McKuen, the bestselling poet in American history who sold 60 million books and 100 million records but is all but forgotten today by SAT0725
And even though he's a poet first and foremost, I suspect Bukowski is better known for his autobiographical novels. Sort of like Maya Angelou.
ItDoesntMatter59 t1_j7mws9q wrote
Reply to comment by positivecynik in TIL the first Blue LED wasn't commercially available until 1989 and bright blue LEDs weren't available until 1993. by j-merc23
You are supposed to use a current limiting resistor. LEDS dont last long with excess current which you will get without one
DavoTB t1_j7mwm1w wrote
Reply to TIL about Rob McKuen, the bestselling poet in American history who sold 60 million books and 100 million records but is all but forgotten today by SAT0725
Rod McKuen was wildly popular as a poet and songwriter in the sixties. Two of his more famous songs were translated from Jacques Brel, (“If You Go Away” and “Seasons In The Sun.”) He wrote an Academy Award-nominated song, “Jean” (from the film, “The Prime of Miss Jean Brodie,” ) as well as “A Boy Named Charlie Brown.”
His singing voice was uncommon, raspy and quite rough-sounding, yet his albums sold extremely well in the era. However, those and the books he published did not have the lasting impression on the public as tastes changed.
Couldbehuman t1_j7mv5wo wrote
Reply to comment by Splice1138 in TIL the first Blue LED wasn't commercially available until 1989 and bright blue LEDs weren't available until 1993. by j-merc23
>I also read about it being used in image compression. If you split an image into R, G, and B channels, you can save the B at half resolution and the difference is nearly imperceptible to human eyes, whereas it is easily seen if you do that with R or G.
Never heard of chroma subsampling happening in RGB, generally that's converted to something like YUV which is a Y channel of luminance (about 58% derived from the green channel) and two UV chrominance channels. Both channels of chrominance are then subsampled horizontally by 50%, reducing 1/3 of your original data without even getting to the compression stage. Pretty much all compressed video you ever watch has the chrominance subsampled 50% vertically as well, meaning you've cut the original data size in half.
Point is, not just blue getting subsampled, and since that's what everyone is constantly watching it's pretty safe to say it turned out alright.
nomoregroundhogs t1_j7mt05z wrote
Reply to comment by wufnu in TIL the first Blue LED wasn't commercially available until 1989 and bright blue LEDs weren't available until 1993. by j-merc23
Same. Among certain specific geek circles it was a huge deal at the time that the PS2 had a blue LED.
t3chiman t1_j7mrsht wrote
Reply to TIL about Rob McKuen, the bestselling poet in American history who sold 60 million books and 100 million records but is all but forgotten today by SAT0725
McKuen was popular enough in the 1970s to attract parodists. In Someone’s Sneakers is appropriately wistful and inappropriately vulgar (Credibility Gap, A Great Gift Idea).
[deleted] t1_j7mr27t wrote
nolo_me t1_j7mp2hy wrote
Reply to comment by pebbleinflation in TIL the first Blue LED wasn't commercially available until 1989 and bright blue LEDs weren't available until 1993. by j-merc23
My idea of classy is still stuck on brushed alu and blue LEDs.
Regan-Spor t1_j7nrcp9 wrote
Reply to comment by undefined7196 in TIL the first Blue LED wasn't commercially available until 1989 and bright blue LEDs weren't available until 1993. by j-merc23
Now I have someone to blame for the white light headlights I see on cars.