Dragos Rezeanu
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dragosrevision.bsky.social
Dragos Rezeanu
@dragosrevision.bsky.social
👀 Vision scientist, 🧠 Neuro PhD candidate, 🎨 Colorimetry nerd. Currently studying color vision and retinal circuits
And what about Sam’s song about the guy who kicked the troll because the troll dug up his relative’s shinbone to chew on!? In a wry twist the guy either breaks his foot or has it eaten by the troll (conclusion unclear). Absolute banger! It’s like Peter Jackson didn’t even read the books…
September 19, 2025 at 3:08 PM
That’s an EPS-12V 8-pin power connector (usually goes to the motherboard). The GPU wants more power than a single PCIe 8 pin will deliver on its own and it may have come with a splitter that takes the EPS connection and converts it to 2 PCIe 8-pin connections. support.exxactcorp.com/hc/en-us/art...
August 30, 2025 at 4:29 PM
Miss You by Blink-182 or Waiting on the World to Change by John Mayer both immediately came to mind. Although I think You’re Beautiful by James Blunt was EVERYWHERE around that time too.
June 26, 2025 at 9:18 PM
Of course, it all kind of comes out in the wash because you adapt to the mean light level so what ends up mattering is how many "red" photons you absorb relative to other wavelengths, rather than the total number ¯\_(ツ)_/¯
June 21, 2025 at 5:20 PM
Aww, thanks Pam! That's super kind of you to say :D I'm so glad to hear it!
June 21, 2025 at 5:17 PM
For cones, the probability of absorbing a photon is entirely based on the number of photons arriving and the spectral tuning of the cone type. So if you have the same number of "red" photons arriving and twice as many red cones, you'll absorb twice the photons and produce twice the summed response.
June 21, 2025 at 5:16 PM
Definitely not sure how this would relate back to fluorescence, but that's an interesting point! Is the amount of fluorescence you see for a given fluorophore dependent on the spectral tuning of the fluorophore/probability of absorbing that photon, or on the energy of the incoming photon itself?
June 21, 2025 at 5:16 PM
In each L/M cell type, the L and M opsins "compete" for which one gets expressed, and the resulting ratio seems to be based on subregions in each opsin gene that alter binding affinity for proteins involved in transcription regulation. Specific haplotypes make L or M the more likely fate.
June 21, 2025 at 4:53 PM
There's actually a lot we know about that! Sticking to Red vs Green (L vs M), L and M cones themselves are the same cell type (not true of S), what makes them L or M is the opsin pigment they express. The L&M opsins are encoded by genes that are lined up in row on the long arm of the X chromosome...
June 21, 2025 at 4:53 PM
But how else am I supposed to learn cool facts about the endoplasmic reticulum!? 😅
June 21, 2025 at 3:41 PM
PS let me know if I misunderstood this! I think I maybe just repeated myself and totally missed the point you were making 😅
June 21, 2025 at 3:15 PM
This is a big unknown for now. There’s some evidence that variation in what people perceive as pure green (a perfect cancellation of blue and yellow) may be impacted, but that’s still speculative. Like you said: the brain is just so good at creating a consistent model from really varied input!
June 21, 2025 at 2:56 PM