Shpaget

That is by far the worst battery leak damage I've seen. That being said, just yesterday I received a flashlight of my own - BLF A6. I'm quite amazed by how much light it can put out, even with the low charge battery. It takes a single 18650, for which I have a charger I bought recently in anticipation of buying a flashlight. I've never used it and it's been sitting on my desk for a while, but now the opportunity presented itself, and I popped the battery inside it and flipped out the mains plug (the horrible thing on a hinge) and tried plugging it in the socket, only to realize that it's not going to happen. All the mains sockets over here are recessed and the prongs of the plug on the charger don't reach deep enough. I already have a new charger in the mail (this one is USB, so it should be ok), but I don't expect it for another two or three weeks.

Christmas doesn't enter my home until the evening of 24th, and even that against my taste. The tree also gets booted on the 6th of January, back to the cardboard box it came from, somewhere in deep reaches of the basement, to my endless satisfaction (well, 11 months of it anyway). Unfortunately, my work is heavily dependent on the income we get during December, closely related to ho ho ho stuff, so I suffer. Thankfully, we recently scored a good commission work, unrelated to Christmas, and I happen to be working almost exclusively on that, so I am somewhat spared.

Christmas season is in full swing over here. :grumpy:

You're forgetting that we're not talking about recreational scuba diving, or even professional technical diving. We're talking about living in a high pressure oxygen rich atmosphere.

It most certainly is. http://archive.rubicon-foundation.org/xmlui/bitstream/handle/123456789/6310/SPUMS_V26N3_13.pdf?sequence=1 TABLE 1 NOAA OXYGEN LIMITS FOR SINGLE EXPOSURES PO2 Time 0.6 bar 720 minutes 0.7 bar 570 minutes 0.8 bar 450 minutes 0.9 bar 360 minutes 1.0 bar 300 minutes 1.1 bar 240 minutes 1.2 bar 210 minutes 1.3 bar 180 minutes 1.4 bar 150 minutes 1.5 bar 120 minutes 1.6 bar 45 minutes Even at the depth of 20 m (3 bar total pressure, 0.6 bar partial oxygen pressure) you are already in the region of toxicity for prolonged exposure.

You have to be careful regarding partial pressure of oxygen. At around 0,5 bar it starts to become toxic.

I used FreeCAD for a short while. It's actually quite decent for the cost (free as the name might imply), however, I returned to SolidWorks (which is, of course not intended to be free), but is a beast and just works for everything I threw at it. I don't remember if anything particular was wrong with FreeCAD, it's just that SW is so much better. FreeCAD uses pretty much the same design philosophy as SolidWorks, which I find extremely intuitive. In contrast SketchUp (also free) is something I can't wrap my head around and find unusable. That being said, I've seen people making some impressive stuff in SketchUp. All three of these are actually 3D, but they have no issues with 2D.

Why do you think there is, or should be any? ib4 42

I consider a PC much more than just a gaming platform. For me it's a also a work tool. Furthermore, I don't own and never have owned a console. I just don't see the appeal or justification for the usually expensive purchase of a dedicated game thing. As for the questions of games taking advantage of modern hardware, games have always been a significant driving force in hardware development.

There is also the energy needed to move around all the air to get access to that small fraction we're interested in. Thunderf00t did the calculation in his plastic from air video.

Finally, once it gets obnoxiously loud, put a big fan in front of it, connected to the spinnamathingy, so a whole bunch of air goes around the engine making a sound barrier. I bet it would even make the whole thing better, sending ISP to 5 digit numbers.

There have been a few launches since the start of the thread. Perhaps title change is in order?

While I agree that 7 is better than 10 in some regards, I gave into the forced upgrade from 7 to 10 a couple of years ago and honestly don't mind it. Not going too deep into the whole spyware thing, other than to say there's that, but from usability standpoint, Win 10 is working perfectly fine for me. The what's-her-name search thing is disabled from day one and all the targeted ads stuff that you are asked about at the setup phase is turned off. What I would like to point out is that support for Win 7 is being terminated in mid January 2020 (a month and a half from now), so you are getting a new computer and installing a soon to be obsolete OS. Yes I know, options are limited and Linux is not for everybody (I honestly tried adopting Linux, but failed miserably. I consider myself above average when it comes to computers, but still failed to install network card drivers on Linux and that basically killed it for me. Things have probably changed since that time, but now I don't have time to revisit the attempt), but Win 7 is quickly going down the path of the Dodo.

There are two clusters, but clusters are separated (one in Africa, one in Australia). In addition to those clusters, there are more dishes spread out around the clusters. More area does increase resolution, but with modern signal analysis methods, using multiple dishes is more cost effective way to achieve resolution. However, resolution alone is not enough. You also need the signal strength. That's where collecting area comes in. An analogy would be a digital zoom camera. With a powerful zoom lens you can see small details far away. That's resolution, but if it is dark you may have trouble seing anything. You could try cranking up ISO (gain) but at some point you are just introducing more noise. It's too dark for a good picture. Opening up the iris will let in more light and give you a better picture, but if you've already reached the largest aperture, you're kind of stuck. Your options are either to buy a new camera that has better low light performance (with radio telescopes this won't work since they are already cutting edge and there is littke room for improvement there) or you can use a bigger lens to catch more light (more surface area for radio signal gathering). Basically, the distance between antennas helps us see small things (resolution), while total collecting are helps us see the dark, faint objects (sensitivity). Again sniped by Bill.

In other words, the "square kilometer" number indicates total collecting area of the dishes, not the size of plot of land where the array is built. Radio interferometry (using multiple, spread out antennas) increases resolution to match the theoretical big antenna of the same size as the separation between individual antennas, but it does not collect the equivalent amount of signal (sensitivity). Increasing the total collecting area is needed to get more signal. Square kilometer array attempts to make that collecting area much bigger than anything we have at the moment, while at the same time spreading out the individual antennas thousands of kilometers to achieve the resolution. Antennas will be located in western Australia and southern Africa, so ~10000 km apart.

Then it's yours, so what's stopping you from getting rid of all the blocking software (and potentially some nasty spyware)? I would look into the legal status of that laptop (are you leasing it, or is it your property or whatever). Is having that thing a requisite for school activities? Does it come with some school specific software you need to do your homework? What if you refused paying that $600 in the first place and said you already had your own laptop? Is forcing students to buy such a thing even legal?

Just one short year until it's back home with space goodies.

Last night I actually started writing it, got about half way through (quite a wall of text) but decided to call it a nap time, thinking the editor will remember the stuff I wrote and I can continue this morning. Well, the text is lost. Probably for the best, considering the cringiness of it all. I'm not much of a story teller.

Me, two of my colleagues, a random stranger and a specialist just spent 5 hours chasing a kitten. A two-ish moth old kitty wandered into our business and straight into the basement behind all the clutter that you find in a cluttered basement. I went to a store to get some cat food (salmon and chicken), but kitty had no interest in that. We chased it for a good hour, managed to capture it into a cardboard box, to give it to a random lady that expressed a wish to find it home, but a colleague wanted to see the cat. He opened the box and the cat just jumped out and bolted back behind the machines and whatnot. Another hour of chasing it and we caught it. This time, for some reason, we thought it would be a good idea to release it in the yard. Well, it ran straight into the wheelwell of the boss's car which was parked all the way in a corner so passenger side and back were right up the wall. Dilemma: move the car and risk injuring the cat or leave it and hole it will get out on its own. We couldn't even see where it went. So I gently moved the car (car turned off, rolled down the slope) a bit and finally we could find the cat, but we couldn't reach it and the cat wasn't cooperating. Feisty little thing squeezed into the suspension, so we didn't want to move the car any more, but took out the jack to lift the car and give both us and the cat some more room. While we were dealing with the jack, a bystander commented that the cat got out and ran into a nearby hedge that was on the other side of an enclosed yard that we don't have access to. Spent another 45 minutes trying to lure it out, but no luck. The lady that wanted to give it home returned and brought a specialist from an animal shelter, but after waiting for an hour, trying to call it out and into a cat box, they were getting ready to abandon the mission, so my colleague took some leader, jumped the fence, and tried to catch the trespassing kitty. One acrobatics move later, that Wachowskis would not hesitate to use, the kitty vanished. It took the ladies another hour to lure it into a carrier. It was a cute little gray/white kitty, but with mean attitude. It did not like being grabbed and fought valiantly. I guess I can get back to work now.

Yo guys, where's that positivity? Anyway, yesterday, the aforementioned milling machine finally got assembled and some chips started flying. The DRO still hasn't arrived (maybe I should contact the seller, I still don't have the tracking number or any other indication of stuff happening), but a project for the mill has cropped up and I decided I need to accelerate things. My colleague has a modified drill press that he uses as a milling machine in his little home workshop, but while not particularly heavy (30-40 kg) it's not really practical to move it back and forth. Also, it's still a drill press and not exactly rigid. It can take light cuts in aluminium and brass, but cutting steel is very slow. Those two things convinced us to assemble my milling machine even without DRO and just deal with imperial stuff for the small project we need to do next week. I also have a milling attachment for my lathe, but I should really buy a new vise for it. The thread on the one I have now is shot and even if it was perfect, it's still very limited. However, with a proper milling machine in the shop now, I see no need to do that. Back to my new milling machine. I cleaned what appeared to be storage preservative (I'm not sure why the previous owner left it that way, but the gunk is gone) and oiled everything. I had a piece 5 mm aluminum plate with one nasty edge, put it in a vise and eyeballed a 2-2,5 mm cut to clean it up. Amazing! It had absolutely no problem with it and left a nice finish behind the endmill. I could probably have gone much deeper. Unfortunately, my enthusiasm was short lived. The cleaned up plate now measured 37,28 mm, so I gave myself a task to bring it down to 36 mm. Freedom units, enter stage left. It took me a good 3 minutes and a dial indicator to figure out how much I should turn the Z axis dial, and, honestly, I will have to figure it out all over again, because I have no idea what I did in the end, but whatever that was, after the second cut my aluminum plate ended up being 36,02 mm. I think I ended up turning the dial exactly one turn, which would/should mean that one turn is equal to 0,05 inch, or 1,25 mm, but the marking on the dial go from 0, 10, 20, 30 ... to 100 (100 is 0 again) and there are subdivisions, with IIRC 0,0005 measurement between two smallest marks. That would mean one turn is equal to 0,05 inch of travel. The math checks out, but I am just unable to easily switch back and forth between metric and imperial. I'll do the project next week, but DRO is going to be mandatory. Off to aliexpress to drop a message to the seller. Oh, forgot to mention my metric collets arrived yesterday, so that's a good news.

Transistor based computers. We have almost reached the smallest possible footprint for individual transistors on a wafer. Quantum effects are already starting to crop up. Further increase in computational power won't be possible for long, by just cramming more transistors into the same package. Sure, we can make cores bigger and use more of them, but that comes with its own set of problems. We could really use X, where X to transistors is the same as transistors were to vacuum tubes.

Why sneak? Aren't genders fluid these days?

No "groan" emoji?

So what does acceleration of 321 + 56i m/s2 even mean?

If tachyon is always FTL, then you don't really need much energy to accelerate it to stupid fast. Basically, just show it the door and it will be out before you know it. Literally (since, you know FTL and stuff). Unfortunately, with tachyons being imaginary and all, we don't know how much mass they have and how fast they go, so we can't calculate ISP and thrust. Well, even if we did know their mass and speed, we still have no math capable of calculating the reactive forces of FTL stuff. Honestily, this entire thing is not very scientific.