user134450

@user134450@feddit.de

This profile is from a federated server and may be incomplete. For a complete list of posts, browse on the original instance.

user134450 ,

triangulation

trilateration actually (^0_0^)

user134450 ,

In terms of modern shells being more complex in general: yes and no. modern shells pretty much always use some kind of electronic fusing, sometimes multiple kinds of electronic fuses. back then they had bombs, mines and grenades with literal clockwork inside and electronics was still very rare. also fuses and primary charges were not easy to produce reliably.

user134450 ,

There has been some fusor research going on for decades. The issue that killed that direction of fusion research was ultimately that the electrons do not behave as the initial simple models suggested and in the real world the power loss from the fast electrons is just too big for any reasonably sized device to allow for self sustaining fusion.

user134450 ,

Maybe those were illegal smoke and honey melons 🤔

user134450 ,

Other commenters have pointed out the problems with overloading of connectors and reduced efficiency because of the added resistance but there is another really important reason not to chain power strips: circuit breakers work best against short circuits when the resistance between the breaker and the short is fairly low (for instance less than 0.5Ω) so that the current will quickly go over the rated current of the breaker. If the resistance is a lot higher because you have too many extensions between the breaker and the fault, the time the breaker needs to react will go up. Counterintuitively this usually means more energy will be turned to heat by the fault.

In extreme cases this can mean the difference between a broken power strip that you can just throw out and a burned down house.

user134450 ,

What makes them think that the library of Alexandria did it any other way? Nerds have existed long before the internet…

user134450 ,

So what does this say about the dark matter deficient galaxies? https://www.nature.com/articles/s41550-019-0930-9

user134450 ,

I think they are referring to Uranium with natural isotopic abundance. Which is complete bullshit when you put a picture of a nuclear power plant behind it – which in most cases can not function with the natural isotopic abundance (heavy water reactors being the exception, not the rule).

user134450 ,

first you would need to know what COP you could reasonably get, which among other things depends on the average outside temperature during heating season if you want to use an air sourced heat pump.

The COP can be in a largish spectrum depending on these factors but typical values are 3.5 for average homes in temperate climate. Higher if you live in a warmer climate and lower if you live closer to the arctic. If you want to really do the math it might be good to get help from a professional specialising in heat pumps.

Edit: this is for heating use only. A heat pump can also be used for cooling but then the climate effect is inverted.

user134450 ,

Indeed. atetheonion might contain a bunch of idiocy, but i would not be offended by being included there just because i was sceptical of something.

user134450 ,

Uhhh you realize there are muskets hanging on the wall, right? I think its fair to say they don't just make swords :)

user134450 ,

Is it wood? not clicking a link that goes to wapo...

user134450 ,

from the wiki article on Helium:

an estimated 3000 metric tons of helium are generated per year throughout the lithosphere.

I think the main issue here is not that we are loosing helium on a planetary scale but that the easy to reach helium from gas wells is wasted. We will never run out of helium at our current rate of consumption before the sun goes nova, if we consider all sources on earth, but it will get a lot more expensive and the supply will get less steady.

user134450 ,

oh i must have missed a few orders of magnitude there. 6Mt of helium is a ridiculous amount though ... what is all that used for? according to WA that is about the water volume of the three gorges dam at STP

Edit: just read the report, wow, more than a quarter of all the helium is used just for "breathing mixes" which i assume means its for scuba diving.

Migrating to ZFS

I recently purchased a used PowerEdge R420 rack server with a Compellent SC220 Storage Shelf. I currently have four 3.5" HDDs in the R420 and ten 2.5" HDDs in the SC220. The R420 server previously had TrueNAS installed, so all of the hard drives on both the R420 and the SC220 are formatted with ZFS. I'm now running Ubuntu on the...

user134450 , (edited )

Initiator-target (IT) mode enables creating a JBOD with zfs vdevs on it. You can have the zfs vdevs in raidz configuration (which would give you the same drive redundancy as a hardware raid, with raidz1 performing similar to RAID5)

zfs is commonly used with a JBOD configuration on a raid controller but you can also use any other kind of controller as long as the individual drives can be written to. examples for this would be NVMe drives directly attached to the PCIe bus or normal SATA controllers.
This is more a performance optimization than an issue with compatibility.

user134450 ,

just a bunch of individuals drives

that is literally what JBOD means so congratulations you already have one. a classical RAID would show up as a single drive.

user134450 ,

could you run something like sudo lsblk -o+MODEL and note down the model for the drives? i kind of suspect that the HBA you are using is still doing some abstraction and is not in IT mode. the duplication could come from connecting two SAS cables to the same backplane, thus creating a sort of double image of the enclosure. this is usually handled and hidden by the HBA though if it is configured correctly.

pls also check that you are in fact using the correct ports on the enclosure. if you are not building a SAN only the "A" ports are supposed to be used and the "B" ports should be unused/free.

user134450 ,

datasheet for one of the drive models
apparently these have a dual SAS interface, so what you are seing could be completely normal. i dont have any experience with this type of setup though.

btw you can uniquely identify partitions by using something like lsblk -o+PARTUUID,FSTYPE the partuuid should never repeat in the output even if the partition table was somehow used as a template (though "dd"ing from disk to disk will duplicate those of course)

also check out the "SERIAL" column for lsblk to uniquely identify the drives themselves.

user134450 ,

In the Netherlands you can legally buy grow kits for magic mushrooms. They are fairly easy to use, mostly just weekly/daily checks to keep moisture at the right level and making sure to harvest at the right times (you usually get multiple harvests from just one kit).

Personally i think doing a shroom trip alone is too dangerous … so maybe find a group first?

user134450 ,

your text seems to agree 100% with one of the examples in the original posts text: ”[…] immigrants who […] simply sought better lives for themselves and their descendants“.

could you elaborate why you think it is wrong?

user134450 ,

thank you for the clarification.

user134450 ,

”nitrogen-rich fossil fuels that feed our culture“ wow this article is really badly researched. the problem is of course real and has been described very well by William Crookes in 1898. The answer back then was the development of the Haber-Bosch process.
The input was originally hydrogen from coal not natural gas which shows that the process is a bit more adaptable than this article makes us believe.

hydrogen can be obtained from many sources (including as a pure substance from wells as white hydrogen) and the reason why we use natural gas today is because it is much cheaper than the alternatives, not because other source materials would not scale as well.

how we will be creating inorganic nitrogen fertilizer in the future is a question to be solved but it is not an insurmountable problem – more like an upcoming shift in our economic practice because we will have to switch to more expensive sources.

More things like Star Trek?

Over the last few years my family and I have binged all of Star Trek, then moved on to Star Trek adjacent shows like The Orville and Stargate. At the moment we're not really watching anything sci-fi. I was wondering if anyone had recommendations for similar shows (or maybe some books) that fill the void left by Star Trek. In...

user134450 ,

the infuriating thing is that according to the books he is a pretty unique mix of ... checking ... ”the only child in a family co-op of five fathers and three mothers“

they could have done almost anything with the character in terms of appearance and chose this sigh

  • All
  • Subscribed
  • Moderated
  • Favorites
  • •
  • random
  • test
  • worldmews
  • mews
  • All magazines
    •