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Green Baron

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Everything posted by Green Baron

  1. The experience of growing up and taking over more and more responsibilities, including the ones for oneself, is impossible to explain. Which is by no means a complaint :-) I have no complaint. I go back to my stuff.
  2. I lost my guiding cam at night on the mountain when out with others. When i returned the next day it was gone. No somebody has two and i had to order a new one. I use a Losmandy G11 mount and am just about to return to this hobby. Have finished adjusting things yesterday night. If all goes well the plan is to start with boring M31 tonight and Plejades later in the year.
  3. Idk. I don't play ET. I have studied prehistory (a subject of geoscience), but don't work in the field. And sometimes i play :-) "Almost certainly not" The paper sets the lower limit 3 magnitudes higher but states experiments are lacking. https://www.katrin.kit.edu/ These guys plan to search between 10meV and 2eV. btw.: Is it eV or eV/c² ? The latter, of course ... silly me.
  4. Thanks, which means they are well ahead of wind and waves even if they'd tug slower. Looks they thought it through :-)
  5. I think the others are right. It may be that e.g. for extraction of something not enough continuous space is available. May i suggest for the future to do something like: 5-10GB swap partition, mount point swap 50GB root partition, mount point / "many" GB home partition, mount point /home moar by gusto :-) And format / and /home with a file system like ext4 or reiserfs, available during partition creation. Ext2 is not up to date and has no journal, suboptimal in case of power out or similar ... I use this setup since many years, it leaves the user data partition free of any system stuff, allows for a change of os, desktop, etc. without touching user data and up to now i never had a space problem (on the root partition, i mean :-)). I know this is of little help right now. If you have a free harddisk somewhere you could plug it in, do the above or similar setup, give the user the same name and id as the one you already have, boot from the new one, mount the old one and then copy only your home tree. Copy as user, not as root. No system upgrade is needed. If you need any more help, don't hesitate and so on :-) Edit: i assume you are not running Linux from an SD or USB drive but from a real harddrive. Else i am not sure if ext4 is supported ... maybe one of the cracks jumps in soon :-) Edit: oh, what do you use lvm for ? If raid or mirroring, i'd just mirror the relevant data, that is the home partitoin. Another reason to split up :-) I did raid once but came away from it since it made more work than it had use. I had to read all the documentation again when i bought a new pc ... anyway, with Grub2 a boot partition for lvm isn't needed.
  6. Well, the hurricane was ~1200NM away and a ridge of high pressure in between. They didn't sense much if any of it during the barge landing. They said they where 655miles out. I never know if they mean nautical or statute miles. Let's assume the first. If they tug the barge with let's say 8 knots (i have no idea i must admit but that may be fast for towing) it is reasonable to say they'll be safe in 80h, that'll be the time when Florence makes landfall in the north. So no immediate danger, maybe some swell from afar. If those 655 where indeed land miles then they are in no immediate danger from the storm, i'd expect. if if if :-)
  7. No, you don't :-) I hope he didn't say that in German ... My neighbour had a fire in the garden. A stack of lumber from his carpentry caught fire, spontaneous ignition the fire fighters said later. My suspicion is a carelessly thrown away cigarette stub. I realized the fire next door (well, 70m or so) when i heard the cracking. People from the road stopped to see where the smoke came from and immediately called the fire fighters. Between Mai and October any kind of open fire is absolutely forbidden because dry season and wind. In the other part of the year you need a permit, or you are in danger of being billed for the helicopter or brigade dispatch ... He lives 50m up from his workshop and hadn't realized the fire ! If others had not been so perceptive, this could have run out of control. I should upgrade my insurance ... :-/
  8. Even if you probably mean that as a joke, a rivet as a plug and a sealant has been suggested before and is the best solution. And it makes sense to use the same material as the hull for the plug. I'd just not combine stainless steel and aluminium if it is not absolutely sure that no currents flow never ever if the plug es expected to last for months and is in direct contact with the hull. And imo all the guessing about the when why and how may be satisfying does not bring us forward ... :-)
  9. Interesting, but i don't understand the objective. That the car actually moves along the cable ? And the cable wont coil up or knot ?
  10. I am not a physicist, but i find tone and explanations wanting until now, except @Cunjo Carl of course. In an attempt to solve the problem, as a computer gaming archaeologist i see it that way that all neutrinos until now that were experimentally caught were traveling immeasurably close to c. But it is also clear that they have a small rest mass, so traveling at exactly c is theoretically not possible. But it is theoretically possible that they could travel at any speed, including hanging right in front of my nose and doing the Old Biff "McFly ... ?" :-) It is only, practically that hasn't been detected in any experiment (the hanging part as well the Old Biff part) and nobody knows how to accomplish this. And what counts in physics is the experiment. Right ? Right. Or not ? :-)
  11. At least not while docked. This brings me to a question: during ascend, do the kosmonauts wear full pressure suits and helmets until docked ? If not, how fast would the pressure in the small compartment be so low that they'd loose consciousness ... could be close i can imagine ...
  12. Well, in this case it is not that every shuttle flight went as planned and the one or other returned luckily despite of lost tiles or a stuttering engine ... and we should not count the loss of lives. Be it as it may, i find that bashing a nation in general for the apparent mistake of probably a single worker or a small team is no good. Thinks me :-)
  13. I personally find this unfair. The Soyuz spacecraft has one of the if not the best safety record of all manned spacecrafts, topping even Apollo if you include ground accidents.
  14. KSP & cats is much less of a problem than for instance factorio and cats ... :-)
  15. Well, *cough*, maybe use wording everybody understands ? *duckandcover* For a mean day duration over a year that's correct, we agree that for a calculation between sunset and rise more math is necessary. That is good.
  16. For me it is the other way round. I have a link on ma desktop to cut network connection when a site starts to play videos ... A user friendly browser does not exist (off topic, i know).
  17. Is Scratch meant for education ? That' what it seems judging from the front page ...
  18. You're right, there is something, though not much due to the lack of sunlight (no photosynthesis), maybe like in the deep ocean. Mass extinction feels somehow reserved for larger scale things, like "the big five" (without the human caused one, that is the big sixth). Maybe i should better have said "how the ecosystem responds to the changing environment". :-) https://www.nature.com/news/giant-iceberg-s-split-exposes-hidden-ecosystem-1.22670 In other exposed areas of the ice shelf deep sea species were discovered. The problem apparently is to be fast enough because exploration vessels are booked years in advance.
  19. Catastrophes have sort of an appeal, don't they :-) A landslide triggered a 193m tsunami 2015 in Alaska. It was caused by the rapid retreat of a glacier that in the time of its existence had stabilized the landmass with its weight. A study says that the landslide was a direct effect of glacier retreat due to climate change, the resulting tsunami an indirect. Threats to human property in similar situations (glacier retreat, forming of water bodies, mobilization of land and water ...) should be taken into account.
  20. Saying a day on earth lasts 24h is not totally incorrect, but on the surface the experience may be very different and time and location dependent. Here's, some amateur level astronomy for an algebraic approach to estimate sunset and -rise times on a body and thus the time between two such events. I think that answers the question better and it gives some more insight. This was what went through my silly head when reading the op. Numeric implementations can be found anywhere on the internet, i should think. I may be off topic, though and i accept a verdict in that direction :-) - a local coordinate system that describes the location of the observer on the surface and the corresponding horizon. A lunar centric azimuthal one servers here. - a local coordinate system that describes the location of the other bodies relative to the observer. A lunar centric equatorial one is the choice. - transformation between these two. - To simplify the following steps a fixed coordinate system in which to describe the positions of the bodies would be a good idea. A sun-centric one with the parent planet's ecliptic as plane is what i would choose here. - transformations to one of the two above - a location independent representation of time. Like julian date. - a set of orbital elements for the planet and the moon in question. These can be taken from a nautical or astronomical almanac. - a set of precalculated perturbations for at least (in earh's case(*)) venus, mars and jupiter to apply to - the following number cruncher that "simply" applies the perturbations to the mean orbital elements for the given time and coordinates on the moon and solve it so that the sun appears on the local horizon. ... et voilá, that'll leave you with an accuracy in a few minutes range, enough for a game. Not enough for nautical (1NM = 1 minute on a great circle on earth) application or for use in a decent telescope to find a star. Equatorial coordinate systems are linked to a limited time frame, as everything changes over time, and more than one thinks. So either a formula to describe the changes (precession, nutation, plane change through orbital influence of other bodies, ....) or a range of validity in the margins of an accepted error should be taken into account. This is done by naming an epoc for which the above numbers are assumed to be valid. Phew :-) (*) in moons case we shouldn't forget earth's influence ... btw.: Sidereal period of the moon is colloquially and frequently in literature used as the period it takes for the moon to return to the same spot in the sky as seen from earth. Even my "beloved" wikipedia has it that way. Which would not include a proper rotation of the moon, that's why i objected. We are still too earth-centric, we humans .... :-)
  21. [own nonsense deleted] Your formula does not take into account for an own rotation, an axis tilt, a non circular orbit or one that is inclined towards the planets ecliptic. It only works for a given point on the moons surface if the moon rotates together with its orbital period. That's tidal locking, or not ?
  22. We haven't expanded on the issue of the apparent traces of a less than optimal aiming of the borer while it was already turning :-) - telephone rang - earthquake - strong wind blowing through open window - distracted by escaping goo - shaky dolly / table / chair combination (could be me, borer is set and dolly rolls the other way) - silly colleague shakes the ladder - ... other ?
  23. It is a good approximation for a tidally locked moon without other influences under the given constraints, the earth's moon is only a few hours off. For the moons of the gas giants like Ganymede or Titan you can even omit the term (1/orbital period of planet), their daytime is roughly the same as their orbital time.
  24. Yeah, emacs has a command for everything. I mean everything. But i can't memorize everything. Please, may i use nano ? I mean, i'm just doing a small shell script and it would be ready in an hour or so .... or in 2-3 days if i were forced to use emacs. Ha, that reminds me of another snotty word i heard from a free climber. When asked by a paraglider "How long does it take you to reach the summit ?" he answered "Hmmm... 20 minutes. Or the rest of my life." The two did a race then and arrived simultaneously at the summit cross. p.s.: as you have probably noticed, i am not a real programmer :-) Good night y'all.
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