The Official Status Thread
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@Rhywden And it gets worse. So, before the exam they asked me: "Which topics will be covered?"
Yes, it's only been two months effective, what do you think it'll be? Everything, of course.
But I told them some specifics as in: "This is probably more important to know than the rest."
And mentioned the Lorentz force - we did several tasks related to that one, I had them write a small research paper regarding the principle of a mass spectrometer and so on.
One of the tasks in the exam was: "Inside a mass spectrometer you'll find that charged particles are forced into a circular trajectory. Please explain how this trajectory comes to be and which directions have to be considered."
NOT A FUCKING SINGLE ONE OF THEM EVEN MENTIONS SOMETHING LIKE "perpendicular". Hell, I made it easy for them and did not even mention something like the cross product.
I'm really pissed off right now.
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@Rhywden Jesus fucking Christ.
"positively charged field lines".
While the task is about a magnetic field.
My colleagues have similar problems with this year, by the way.
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@Rhywden You know those stamps you use as a teacher? Like "Thumbs up!" or a smiling face?
Right now I need a barfing smiley stamp.
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@Rhywden said in The Official Status Thread:
@Rhywden Jesus fucking Christ.
"positively charged field lines".
While the task is about a magnetic field.
My colleagues have similar problems with this year, by the way.
I need to positively charge some magnetic field lines. Isn't that how railguns work? /s
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@e4tmyl33t said in The Official Status Thread:
@Rhywden said in The Official Status Thread:
@Rhywden Jesus fucking Christ.
"positively charged field lines".
While the task is about a magnetic field.
My colleagues have similar problems with this year, by the way.
I need to positively charge some magnetic field lines. Isn't that how railguns work? /s
No, there, the coils turn the slug into a magnet which is then attracted by the target.
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New Status:
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@e4tmyl33t said in The Official Status Thread:
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@Rhywden You started grading without essential tools?
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@Rhywden
Sorry, , but our correct answers are at the bottom of another bottle.
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@Applied-Mediocrity There are not enough likes for this.
However, I may use the Colbert-Facepalm on them.
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@Tsaukpaetra
That's what INT (if the table gets truncated frequently so that 2 billion records is reasonable) or BIGINT auto-incrementing "synthetic" keys are for.Using a wide-ass column as your primary key just because it's the natural key is going to drastically reduce the value of removing the full table scans, unless that natural key is literally always in your WHERE clauses.
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@Rhywden said in The Official Status Thread:
Status: It seems that several of my pupils are incapable of simple logic. They should know that if a body is at rest then this means that either there's no outside force or the sum of all forces equals zero.
Surely, these are not the same pupils you recently asked to order 1/2, 1/3, 1/4 ?!
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@izzion said in The Official Status Thread:
as your primary key
Prepare to be horrified:
@Tsaukpaetra said in The Official Status Thread:
no primary keys or anything
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@Tsaukpaetra said in The Official Status Thread:
This might take a while, or not long at all,
It took half an hour after the resize to 20 DTUs.
We'll see if I can finagle the table to have an arbitrary primary key if this doesn't end up actually helping things.
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@topspin said in The Official Status Thread:
@Rhywden said in The Official Status Thread:
Status: It seems that several of my pupils are incapable of simple logic. They should know that if a body is at rest then this means that either there's no outside force or the sum of all forces equals zero.
Surely, these are not the same pupils you recently asked to order 1/2, 1/3, 1/4 ?!
They should not be.
Currently I'm not that sure, though.
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@Rhywden said in The Official Status Thread:
@Rhywden You know those stamps you use as a teacher? Like "Thumbs up!" or a smiling face?
Right now I need a barfing smiley stamp.
A few years ago (okay, a decade) I TA’d an analysis for CS majors 101 course1. One group handed in an exercise where they started a proof but got stuck and it lead to nowhere. So they just drew a little frustrated Bernd das Brot below it saying “Mist!” That greatly amused me so I gave them extra credit.
1 Never doing that again, though. Freshmen are terrible. They’re just out of school and haven’t yet realized that it’s not school, they’re there voluntarily on their own accord, and they can just stay away if they don’t like the class. You only hear whining about “I just want to do programming, why do I need to learn math?” Or they’re not listening and talking and shit you expect of pupils. Just go home, give the people who want to be there the chance to learn something.
Once they’ve reached like third term, you’ve mostly weeded out the bad ones and/or they’ve learned the ropes.
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@topspin A friend of mine recently had someone draw a figure under her math test, asking her for at least one or two pity points.
I told her to put this under the request:
(Translates to: "Here are even 15 points for you!")
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I am working on mapping a new TSV file export. It is 10:30pm here and the Database between the old system and the new system is soo different it is probably going to take me to the small hours to finish it off. Oh well I don't have to be in the office tomorrow and I've got plenty of coffee.
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@Tsaukpaetra
Right, I gathered that the table was a heap before. But in a case like this where the only natural key is already auto-incrementing (last processed time stamp), using a BIGINT key is the same width as the DATETIME2 field (8 bytes) but has no collision possibilities -- DATETIME2 is only 0.1ms precision maximum, so if you get highly transactional, you're setting yourself up for failure using a datetime field for your PK.And if 2 billion rows is a reasonable "max this will ever be" size for your table (because it's being truncated or whatever), then an INT field is actually 4 bytes smaller, which will save 4 bytes per row per non-clustered index of storage, memory pool pressure, and disk I/O for seeking.
Hence the usual recommendation to create an auto-incrementing (BIG)INT field as a synthetic primary key for tables of this nature.
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@izzion said in The Official Status Thread:
using a datetime field for your PK.
You're still assuming I have a primary key, or that I'm going to be doing updates to rows in this table. Stop that.
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@Tsaukpaetra
You just said you were creating a clustered index. Which is a PK in all but the unique constraint, as far as how SQL treats it.If you need a CI on the table, put a PK on the table and do it properly
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@izzion said in The Official Status Thread:
@Tsaukpaetra
You just said you were creating a clustered index. Which is a PK in all but the unique constraint, as far as how SQL treats it.Exactly. But it's not a primary key, and I'm not treating the table like it has a primary key that will be useless anyways.
If you need a CI on the table, put a PK on the table and do it properly
But I don't need or want a primary key.
I feel like I'm echoing myself....
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Status: Fucking hell, could you at least tell me what the value was??!?!?
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@Tsaukpaetra said in The Official Status Thread:
Status: Fucking hell, could you at least tell me what the value was??!?!?
Sorry. Security.
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@Tsaukpaetra Why would you expect the messages tab to actually tell you anything useful.
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@izzion said in The Official Status Thread:
put a PK on the table and do it properly
Here you go:
(No this does not work because of the aforementioned granularity of the datetime column. Yes there are records that essentially happened at the same time.)
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Status: Wondering what @Cursorkeys was ordering from Farnell.
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@Zerosquare said in The Official Status Thread:
Status: Wondering what @Cursorkeys was ordering from Farnell.
Heh, nothing too exciting. 400 quid of mostly passives and that single pricy item which was an OLED display, I don't really need an OLED for this project but white on black is sexy:
Edit: This is a 5 joule 15kV impulse generator. But I already have the other bits. I've come up with a novel way of series connecting COTS FETs to switch HV with them self-balancing. There might be a paper in this if it works in practice, just been SPICEd so far.
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@Rhywden said in The Official Status Thread:
@Rhywden You know those stamps you use as a teacher? Like "Thumbs up!" or a smiling face?
Right now I need a barfing smiley stamp.
We had a "kinetic energy cannot be negative" stamp as college graders.
I feel your pain. My kids are testing on momentum tomorrow.
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@Benjamin-Hall said in The Official Status Thread:
@Rhywden said in The Official Status Thread:
@Rhywden You know those stamps you use as a teacher? Like "Thumbs up!" or a smiling face?
Right now I need a barfing smiley stamp.
We had a "kinetic energy cannot be negative" stamp as college graders.
I feel your pain. My kids are testing on momentum tomorrow.
Conserved during a jump unless you move, right.
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@Gribnit said in The Official Status Thread:
@Benjamin-Hall said in The Official Status Thread:
@Rhywden said in The Official Status Thread:
@Rhywden You know those stamps you use as a teacher? Like "Thumbs up!" or a smiling face?
Right now I need a barfing smiley stamp.
We had a "kinetic energy cannot be negative" stamp as college graders.
I feel your pain. My kids are testing on momentum tomorrow.
Conserved during a jump unless you move, right.
Yeah. And we're not even doing the hard stuff. Just 1d, 2 body collisions, and no math with elastic collisions. Last test of the semester.
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Status: Linux Mint just no-prompt auto-rebooted me while I was trying to read this thread!
I think I have a failing power supply. I can hear the chassis fans slow down anytime something makes the CPU work. I first noticed it when the PC got quieter any time I moved the mouse scroll wheel.
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@mott555 said in The Official Status Thread:
Linux Mint just no-prompt auto-rebooted me
When Linux crash, you know you have a hardware problem
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@mott555 said in The Official Status Thread:
Status: Linux Mint just no-prompt auto-rebooted me while I was trying to read this thread!
Linux Update!
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@Benjamin-Hall said in The Official Status Thread:
@Rhywden said in The Official Status Thread:
@Rhywden You know those stamps you use as a teacher? Like "Thumbs up!" or a smiling face?
Right now I need a barfing smiley stamp.
We had a "kinetic energy cannot be negative" stamp as college graders.
I feel your pain. My kids are testing on momentum tomorrow.
I just got through that stuff myself.
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@pie_flavor said in The Official Status Thread:
@Benjamin-Hall said in The Official Status Thread:
@Rhywden said in The Official Status Thread:
@Rhywden You know those stamps you use as a teacher? Like "Thumbs up!" or a smiling face?
Right now I need a barfing smiley stamp.
We had a "kinetic energy cannot be negative" stamp as college graders.
I feel your pain. My kids are testing on momentum tomorrow.
I just got through that stuff myself.
Compared to forces, momentum and energy is easy. In 1D at least
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@Benjamin-Hall Now we're on torque and rotational momentum, which is far more annoying.
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@pie_flavor It's just the same, just with greek letters!. Oh, and cross products and rotating reference frames thrown in just for fun.
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@Benjamin-Hall Yeah, but rolling motion.
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@pie_flavor said in The Official Status Thread:
@Benjamin-Hall Yeah, but rolling motion.
Much fun. Have fun with the moments of inertia!
As long as you don't have to do Coriolis forces or the other as-seen-from-a-rotating-frame forces, you'll be fine.
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@mott555 And now it's stuck in a reboot loop. Anything that causes the CPU to move past idle seems to make it reboot. Yay, Linux hardware!
It's a Mini-ITX system in a Habey 600 case. I wonder if it's the external power brick that's bad, or the internal DC-DC converters...either way, I guess this is a good excuse to relocate the hardware into a compact 2U chassis with a more conventional PSU.
EDIT: Got a standard ATX power supply hooked up to it now. The PSU is bigger than the case! But the chassis fans no longer audibly slow down when I use the mouse's scroll wheel.
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Status: Spent most of my non-Thanksgiving free time over the past three weeks writing a Sponge plugin which was basically a very customized loot box system. Lots of not-very-fleshed-out parts of the API were used; there was a lot of looking up documentation and hacking stuff together. Plus I kept having to rewrite half the code because the requirements kept changing every five seconds. I ended up with something that functioned absolutely perfectly, I submit it, bossman asks client to test it, client tells bossman he was running a Spigot server instead of a Sponge server (zero cross-compatibility). All of that work was for absolutely nothing.
Whee.And I care not a fig because I got paid for every second of it.
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@Tsaukpaetra said in The Official Status Thread:
Amazing!
Trying again with a slightly more recent ISO.
Fucking lies!
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@Tsaukpaetra said in The Official Status Thread:
Fucking lies!
On a hunch I demoted the server from being a Domain Controller. Also decided to try Windows 2019 for funsies.
Well what do you know?
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@Tsaukpaetra said in The Official Status Thread:
Well what do you know?
Oh?
Well, it's been much more than "a few moments" so no breath-holding is happening, but I'm pleased Windows was able to install (over USB 2.0) in only 90 minutes.
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STATUS Every Monday off for the rest of the year official. I have no imagination but I'm going to spend my 3 day weekends hammered and playing video games.
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@DogsB Doesn't your video game skill get hammered when you do too? Those seem like they should be separate activities.