## computer vision – Would a four color display have higher image quality than an RGB display?

We have four types of photo receptors in the eyes but computer color systems just use the three red, green and blue.

Three could be motivated if rod sensation is just a linear combination of cone sensation. Is it so or would a four color display with a fourth pixel component with a frequency distribution similar to that of rods add image quality?

## windows server – Security eventlog from a computer in open cyberspace

Hello security stackexchange.

So this question comes from having to work on a computer in open cyberspace with nothing more than bear bones to protect its self. Its been on constant attack ever since it got up, then it got cracked yeaterday. And here is the first audit Successful log:

Can we trust windows anymore? looks to me there is a crack for logon as NT System.
How can we trace this lead? Soon after success, it will do reads on every users credential manager.


Subject:
Security ID:        SYSTEM

## questions using linear search – Computer Science Stack Exchange

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## arithmetic – Computer Architecture: How does the parallel prefix adder speed up carry generation?

I am confused by how the parallel prefix adder (the one described in this presentation: https://users.encs.concordia.ca/~asim/COEN_6501/Lecture_Notes/Parallel%20prefix%20adders%20presentation.pdf) speeds up carry generation (specifically the Ladner-Fischner adder architecture). I understand how carry generation in a non-parallel CLA (carry-look ahead) adder works—carry bits are computed using just the initial carry bit ($$C_0$$) and propagators and generators:

$$C_{i} = G_{i – 1} + P_{i – 1}G_{i – 2} + P_{i – 1}P_{i – 2}G_{i – 3} + … + P_{3}P_{2}P_{1}P_{0}C_{0}$$

But how exactly are carry bits computed in a parallel fashion for a parallel adder? I am having trouble with the grouping. I know that in a typical arithmetic expression like the one below:

$$a + b + c + d$$

We can group in the parallel fashion:

$$(a + b) + (c + d)$$

But how are the terms in the $$C_i$$ formula grouped? Especially since the first step of the adder is to generate all the individual $$P_{i}$$ and $$G_{i}$$ units but the terms in the $$C_i$$ have a lot of $$P_{i}$$ and $$G_{i}$$ combined together.

## air travel – Flying with a desktop computer (as checked luggage)

I personally would take some precautions. First of all, make a backup of your data. Leave on in your home and take another one with you so that you can use it in your destination place. Then when transporting a desktop computer, the most fragile part is almost always the hard disk drive. So I would dismount it if possible and take it into your cabin luggage. You could also do this for other sensible parts like for example other drives, the processor, or the RAM bars. This I would pack into anti-static bags and take it into the cabin.

The tower itself you can put into protected pc transporting bags like this one. This bag will be checked so that you can’t smuggle and weapons or drugs. But you shouldn’t normally fear that this will damage your computer.

And last but not least, you could also think about sending your computer with a carrier. I quote this from a message board:

Send it via a Secured Carrier, RPS(Royal Packaging Service), Which
Delivers Things in the most pristine state Possible. Door to door
Service, White glove care. But i warn you, Its pricey. 15lb =
\$200/USD.

## computer architecture – what is difference between speculation & prediction?

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## memory – the computer does not start after installing additional RAM

I have 4 slots for RAM. I bought 4 boards for 2GB. when I insert all 4, the computer does not start. starts only if I insert 2. tell me, please, can I put all 4 and so that the computer starts? win 7 64bit. motherboard: manufactured by NT Computer model AGENT 6400/250. CPU: Intel (R) Core (TM) 2 CPU 6400 @ 2.13 GHz, 2133 MHz, cores: 2, logical processors: 2

I’m trying to insert this plate:

plate

## Sony Nex 5R Direct Video Feed to Computer

I have a Sony Nex 5R that I would like to use to record video into OBS or another software program. Is it possible to get a special wire of HDMI converter to input the video-feed from my Sony 5R directly into recording software or my computer (like a webcam). Maybe combining it with a special HDMI blackmagic box or an alternative?

## computer vision – A few questions regarding simCLR

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