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I leave mine on. My information is dated, but last I checked the consensus was it was sort of a toss up (assuming adequate cooling) which is better.
The thing about turning sensitive electronic equipment off and on is when you turn it on there is inevitably a bit of a power surge, and this is hard on the equipment, in and of itself, basically making this as "harmful" as leaving a system on.
The reason I lean toward leaving it on is lack of moving parts. As far as I know, electricity and heat operating within specs will not damage the etched pathways in the silicon over time, as long as the cooling is good. Basically, it's all solid state, so current within spec should be fine. Surges might be a problem though.
Edit: The big issue if anything is fans, but I'll replace mine as needed.
Real programmers use butterflies
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I leave it on.
Numbers from my UPS load monitoring:
- bare minimum (router, WiFi, DNS/DHCP server, phone, etc) = 35W
- night standby (desktop in standby, NAS on) = 120W
- work mode (desktop on, monitors on) = 200W
I have hard drives in my NAS and some of them are 6 1/2 years old. Figured stressing them with start/stop wouldn't bring any good.
Mircea
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Everything sleeps. All Windows updates are done "on request"; no wake ups from anything.
I find that everything from light bulbs to electronic equipment always seem to last work and when it was last "on"; nothing ever seems to fail while you're using it. (Except one monitor; smoking then die while using it).
"Before entering on an understanding, I have meditated for a long time, and have foreseen what might happen. It is not genius which reveals to me suddenly, secretly, what I have to say or to do in a circumstance unexpected by other people; it is reflection, it is meditation." - Napoleon I
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I set my displays to go into sleep mode after about 10 minutes, the PCs to go to sleep after a couple of hours, and the NAS drives turn on as needed. Everything is connected to surge protectors, which have a delay before they turn on (this helps avoid cases where the power cuts out, comes back on for a couple of seconds, then goes off again). I don't have UPSes.
I just lost my first NAS HDD (after years of use and transfer between various NAS enclosures). I have never lost a PC or display following this regime. OTOH, I haven't had much luck with UPSes; they (or their batteries) seem to die very quickly.
Freedom is the freedom to say that two plus two make four. If that is granted, all else follows.
-- 6079 Smith W.
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These days, being semi-retired I'm not using the computer all day, every day. I just use a single laptop for work + "home" use. (And no, I don't have a problem with limited screen space; alt-tab isn't hard and I just find it easier that all windows are directly in front of me!). When not in use I just close the screen. Windows goes to sleep mode, and hibernates after a couple of hours (the laptop is almost permanently plugged in to mains). I apply Windows updates on my terms, and that just involves a reboot, not a power-down. Can't remember the last time the mainboard was fully powered off; possibly years ago. Main system drive is SSD with spinning iron for apps + data, but everything important backed up to various clouds.
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I never turn my computers off (unless vacation, etc.). They go into sleep mode after 20 mins of non use to conserve on electricity consumption, but never off.
It is my understanding that turning equipment on/off all the time is not good in the long run due to electricity surges, and other issues. I know for a fact this use to be an issue in the "old" days, but not sure with modern equipment - never really bothered to investigate.
I will say, that it has not caused me any issues at all doing it this way, all these years.
modified 9-Jan-22 3:33am.
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I just put things in sleep mode, but the reason is convenience. Yes, turning electric things on and off causes expansion and contraction, but I doubt it makes a discernible difference. You will probably replace your equipment due to obsolescence before it fails for any reason.
Physics is hardly my strong point, but I believe the effects of bending on metal are not cumulative over time. You can break a paper clip in two in less than a minute by bending it back and forth rapidly, but I wonder if it's the "rapidly" part that makes a difference. After the paperclip breaks, or even before, you'll notice it gets hot. But what if you bend the paperclip just once an hour? Will it break after the same number of bends (more or less)?
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It takes the machine 5 minutes to boot, or 5 seconds to wake up if suspended.
Bastard Programmer from Hell 
"If you just follow the bacon Eddy, wherever it leads you, then you won't have to think about politics." -- Some Bell.
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I've got two machines in my home/office that pretty much run 24/7. One is a 13 y/o server (the hardware excluding drives...drives and OS were upgraded @ 5 years ago) and the other is my main development system which is around 4 y/o now. The monitors on both go to standby after 40 minutes. Both machines are really quiet.
I know I shouldn't, but oftentimes, I'll leave a debugging session active overnight...usually as a result of an interruption. Don't you just hate it when you are stepping through code and have that 'aha momemt'...and the phone rings...the next thing you know 2 hours have passed and you can finally get back to that thing you found before you got sidetracked...if you can remember what it was that was. 
There is a danger in leaving stuff open overnight...automatic restarts. I have to admit though, that problem hasn't plagued me in a long time now...it will probably get me this week now! 
"Go forth into the source" - Neal Morse
"Hope is contagious"
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I shut down everything (except NAS).
we're in 20212 and powering up or down computers has no impact on longevity.
CI/CD = Continuous Impediment/Continuous Despair
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That Youtuber never even mentioned the best reason to continue building laboratories in space. There are amazing exotic materials being discovered that can only be produced in microgravity.
Microgravity Materials Research[^]
Exotic Optical Fibers and Glasses[^]
ZBLAN[^] is an example of a material that could potentially revolutionize optical data transmission. Photonic processors will probably need to be manufactured in microgravity.
My understanding is that materials with a perfect crystal structure have unusual properties not found in terrestrial atomic lattices. Materials produced naturally here on Earth almost alway have atomic defects[^].
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Well, to be fair...
1] you can always argue that someone forget that one particular thing you were thinking of... it was not an exhaustive argument... it was, in fact, a higher level argument btw.
2] he did mention that... 2 years ago... 
modified 8-Jan-22 4:20am.
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Super Lloyd wrote: you can always argue
My intentions were to spark a discussion about microgravity materials science. Not sure why you focused on the only sentence that gave you a road to conflict.
Would you like to discuss any of the four amazing science oriented links instead? I find that material science is the most important aspect of space exploration.
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Interesting stuff there David thanks for posting
"Life should not be a journey to the grave with the intention of arriving safely in a pretty and well-preserved body, but rather to skid in broadside in a cloud of smoke, thoroughly used up, totally worn out, and loudly proclaiming “Wow! What a Ride!" - Hunter S Thompson - RIP
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Even when this video was made, the US military budget (DoD, Dept of Energy, State, including foreign aid) was smaller than the US welfare programs. People go after the military budget because it's easy to do so when they really should be going after the pork that's embedded in social welfare programs.
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Politics / religion. 
Freedom is the freedom to say that two plus two make four. If that is granted, all else follows.
-- 6079 Smith W.
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Never heard that, but would make sense, since the military is part of the US welfare strategy, perhaps?
I dunno, just a thought.
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This is a cross-post of our announcement in our site blog[^], but it's worth repeating the announcement of our 2022 CodeProject MVPs.
It's these developers who make this community what it is and each year I am again humbled at the generosity, the depth of talent, and the endless patience in helping those new to the craft, or just new to a particular technology.
A heartfelt thanks go to our new batch of CodeProject MVPs for 2022. The Most Valuable Experts for helping answer questions, and our Most Valuable Authors for their incredible articles.
Congratulations, and thank you, to the following:
| Most Valuable Expert | Most Valuable Author | | #realJSOP | #realJSOP | | Afzaal Ahmad Zeeshan | Abdulkader Helwan | | BillWoodruff | Christ Kennedy | | CHill60 | gggustafson | | Chris Copeland | Glenn Prince | | Christian Graus | Han Bo Sun | | CPallini | honey the codewitch | | Dave Kreskowiak | Jarek Szczegielniak | | Gerry Schmitz | Joel Ivory Johnson | | Greg Utas | Kenneth Haugland | | k5054 | Marc Clifton | | KarstenK | Marcelo Ricardo de Oliveira | | Luc Pattyn | Marijan Nikic | | Maciej Los | Matt Scarpino | | merano99 | Michael Haephrati | | OriginalGriff | Michael Sydney Balloni | | Patrice T | Mircea Neacsu | | phil.o | Mohammad Elsheimy | | Ralf Meier | Nick Polyak | | Richard Deeming | Pete O'Hanlon | | Richard MacCutchan | Peter Huber SG | | Rick York | raddevus | | RickZeeland | Raphael Mun | | Sandeep Mewara | Sergey Alexandrovich Kryukov | | Stefan_Lang | Sergey L. Gladkiy | | thatraja | Sergio Virahonda | | TheRealSteveJudge | Shao Voon Wong | | Tony Hill | Shaun C Curtis | | W∴ Balboos, GHB | Steffen Ploetz | | Wendelius | tugrulGtx |
cheers
Chris Maunder
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Congratulations !
With deep appreciation for all of you, and, deepest appreciation for OriginalGriff, Richard Deeming, and Richard MacCutchan, who, imho, set the standards on QA forums for patience with new, confused, seekers-after-whatever, and, for the highest quality technical responses/solutions explained articulately.
A privilege to be among you, to learn from you !
«The mind is not a vessel to be filled but a fire to be kindled» Plutarch
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Thank you Bill for those kind words. And good to see you on the list again.
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Congrats everyone, and very impressive to see #realJSOP in both columns! That takes effort!
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Congratulations; lots familiar names 
Bastard Programmer from Hell 
"If you just follow the bacon Eddy, wherever it leads you, then you won't have to think about politics." -- Some Bell.
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Thanks Chris. It's an honour to be among such august luminaries.
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