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Messages - SpaceAnemone

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1
General Discussion / Re: Random Stuff Part IV
« on: June 05, 2018, 02:34:57 pm »
Does that mean they got rid of the thing where it automatically skips the intro? Because for some shows it automatically does (or did) skip the intro whenever you watch more than one episode at a time.

No, it still does that

Netflix will take over the world with the skip intro button. It's now a better product than having an entire show on the harddrive.

What's worth watching on Netflix these days?

for you ... uh ... s03e06 of black mirror if you haven't seen it. maaaybe the series of unfortunate events or jessica jones.

Hmm.. not a fan of Black Mirror overall, though that's going on the first season or two mostly, and I haven't seen more than the VR spaceship episode of the most recent set. They clearly like playing with "edgy" ideas, but not enough to think very far through the implications for those overall in society, so I feel like it ends up as a series of seemingly controversial but fundamentally empty statements. Also I think I like things better if they come in lots of installments like GoT. You were the one who convinced me I should give that a try, so now I'm looking for a recommendation that's at least as good :-P

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General Discussion / Re: Random Stuff Part IV
« on: June 04, 2018, 07:30:06 pm »
Netflix will take over the world with the skip intro button. It's now a better product than having an entire show on the harddrive.

What's worth watching on Netflix these days?

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General Discussion / Re: Random Stuff Part IV
« on: May 20, 2018, 01:36:27 pm »
As an instructor, I never heard the word tutor used for the speaker of record at an educational meeting. "Tutor" usually refers to somebody who works with a student one on one.

That said, if the question is "what should I call this person verbally to get their attention," then the answer is that if they do not have a PhD, you either say "professor" or "Mr./Mrs./MS. Name."

It depends where you are. Here in the UK, most people doing teaching are not correctly called professors, because "professor" is only the very top tier of the academic hierarchy, with readers, lecturers and research fellows below that (while still holding a PhD). If you address all of them "professor", you may just sound like you're trying to suck up, or are generally ignorant/unobservant. (https://en.wikipedia.org/wiki/List_of_academic_ranks)

I'm assuming silver wanted to know for  fanfic-writing purposes, and I'm relatively sure that he leans towards US English for that, but on the off-chance his interest is academic, I figure it's worth covering all bases :-)

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General Discussion / Re: Random Stuff Part IV
« on: May 20, 2018, 01:08:17 pm »
I've only ever heard tutor used for one-on-one teaching.

I'm using "tutorial" in this sense: https://en.wikipedia.org/wiki/Tutorial_system -- as I mentioned to silver, it really depends what he means by "tutorial" :-)

I came through the Oxford system as an undergraduate, and then tutored for a couple of years as a grad student too. Tutorials were almost always either in pairs or threes, though I had a few on my own because of the way some stuff worked out as a third-year undergrad, and I found those the most terrifying! I think as a student, I had maybe 3-5 tutorials per week during the intense bits of termtime, on top of 10+ hours of lectures.

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General Discussion / Re: Random Stuff Part IV
« on: May 20, 2018, 08:54:37 am »
What have we done...

Thanks for posting this. Otherwise I'd have missed out on a lot of funny posts.

Totally unrelated – what is the common English term for the person doing a lecture or tutorial at a university that works in both cases? That person isn't always a professor. Lecturer?

Instructor

"Tutor" would be okay in a lot of settings, and I think it has more academic connotations than "instructor". It's true that in the UK, "professor" is usually reserved for tenured professorships, whereas in the US it tends to mean almost anyone with an academic teaching post. It also depends on what you understand by the word tutorial :-)

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General Discussion / Re: Random Stuff Part IV
« on: February 28, 2018, 05:33:06 pm »
I had six wisdom teeth! I had them put me under. Really don't think I could have handled being awake for that... I'm a weenie.

I only ever had three :-(

(Also, I need to post something in this thread or I'll miss finding out about all the future random things...)

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General Discussion / Re: Random Stuff Part III
« on: December 10, 2017, 06:55:32 pm »
I'm also working on my RMM... it's on the more complicated side... pretty excited to run it. I just hope it'll fill.

I don't know if it's actually simpler than Space Alert, but I think I can make it sound simpler  :D

Space Alert lost another player today :-(

I think I need to re-balance it for fewer people, or give up on it altogether. You still willing to help with balance stuff?

8
General Discussion / Re: Fun Recipes
« on: October 28, 2017, 10:15:41 am »
dutch oven

Your recipe sounds great! I'd never heard of a dutch oven before, and thought it might be something exotic... turns out it's just the sort of pan I'd call a casserole dish, so that's dead easy!

I approve of cooking beans from scratch in a pressure cooker for hearty weekend cookery, though I'll admit to resorting to tins quite often of a weekday evening when I'm home late from work and just want to get dinner on the table :-P

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General Discussion / Re: Random Stuff Part III
« on: September 08, 2017, 06:45:33 am »
does anyone else super enjoy wide pencil lead? like .9mm+

it feels like digging an informative canal

Huh. It's 0.5mm 2H for me by preference! It's not like I can read my own writing very well anyway...

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General Discussion / Re: Random Stuff Part III
« on: August 13, 2017, 03:58:56 pm »
does anyone here do snapchat? i'm schad1

Aw, if you'd posted that about 24 hours earlier, we could have snapchatted you from the Berlin meet :-P

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General Discussion / Re: Random Stuff Part III
« on: August 05, 2017, 04:13:18 pm »
I have UR gkrieg!

Send a delegation to Berlin on Wednesday if you want to see him...

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General Discussion / Re: Random Stuff Part III
« on: July 26, 2017, 04:14:57 pm »
Where do you put the comma if you stack double and single quotation marks?

Like, "There is a thread about random stuff, it's called 'Random Stuff Part III'," said silver. Do you do '," or ,'"?

"There is a thread about random stuff, it's called 'Random Stuff Part III'", said silver. The comma is not a part of any of the quotations, so why put it inside them?

This is one of the cases where there's a technical difference between British English and American English: American style guides put punctuation inside the quote even when it's not part of the quoted string itself, and British style guides leave the punctuation out so that the quoted string is exact. Therefore, being a Brit, I think Awaclus's version is correct :-)

13
General Discussion / Re: Random Stuff Part III
« on: June 06, 2017, 05:18:48 am »
For all of you Pokémon Go players out there...

http://www.ablogtowatch.com/romain-jerome-tourbillon-pokemon-watch/

I rather enjoy Pokémon Go, but ever since getting a smartphone, I've totally stopped wearing a watch.

I'm not sure I ever quite understood watch-as-a-personal/fashion-statement as opposed to watch-to-tell-the-time anyway.

14
General Discussion / Re: Random Stuff Part III
« on: March 23, 2017, 12:10:45 pm »
Also, tangentially related to the sound discussion:

The cochlea is a mechanical Fourier transform calculator.

More than tangentially related, I think :-) When Awaclus started talking about sound waves, I mentioned that to me, music tends to be thought of in frequency space anyway. You can kind of look at a piano keyboard as a spatial representation of the Fourier space for the music... makes sense that we've chosen that sort of a representation, given that our hearing and auditory perception are tied to it.

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General Discussion / Re: Random Stuff Part III
« on: March 22, 2017, 09:36:25 am »
Any function you can get by summing an arbitrarily large series of sine waves can also be an actual physical sound. I actually have no idea why you would think otherwise in the first place. I would argue that since we aren't capable of hearing an infinitely high frequency, it actually helps our intuition more because you only need a finite series of sine waves to perfectly replicate any sound to the degree that anyone can tell, which makes it possible to demonstrate it physically.

This is how additive synthesis works, by the way.

So what you're really saying is that what we call sounds are band-pass-filtered versions of those "arbitrarily large series of sine waves", which I broadly agree with.

The thing is, with music, most people are so used to thinking about something that relates to frequency space (i.e. notes) that it's not at all surprising to hear that playing two notes at once adds up sounds. We also tend to name them (mostly) after the fundamental frequency, and most of us certainly can't listen to a square wave and comment intuitively about its various frequency components and their offsets or ratios, so we automatically simplify out some of the interesting detail. I just somehow find it more surprising and neat to be able to represent a sawtooth wave (or anything else that's defined based on its appearance in the spatial domain rather than the frequency domain) as a bunch of sines.

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General Discussion / Re: Random Stuff Part III
« on: March 22, 2017, 06:21:18 am »
yeah but that's way too complicated. I also don't find it impressive.

I didn't totally believe my tech studies teacher in high school when he told me I could make any periodic signal just out of summing sine waves...it just didn't seem intuitive to me at the time, so I'd assumed there would have had to be a lot of caveats, and that it wouldn't work for anything particularly interesting. It wasn't till a few years later at university that I met the actual maths behind it and understood how neat it was :-)

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General Discussion / Re: Random Stuff Part III
« on: March 21, 2017, 04:19:41 pm »
You math people are so cute. It's why I stay here.

Sometimes I have to pretend to be a normal human female person. Talk about scary!

What do you do for a living outside in the real world if you can get by without maths?

18
General Discussion / Re: Random Stuff Part III
« on: March 21, 2017, 03:06:25 pm »
What language is that?

total = (EndAge+StartAge)*(EndAge-StartAge+1)/2, for what it's worth. No idea why you are computing that though.

formula checks out.

If you want a direct formula, try: EndAge = -0.5+sqrt(2)*sqrt(66.125+TotalMoney)

The two things you need to know to derive that are just:
1) The sum of a set of numbers from 1 to N inclusive is 0.5*N*(N+1);
2) The Quadratic Formula.
(And then just a bit of rearranging to tidy it up).

19
General Discussion / Re: Random Stuff Part III
« on: March 21, 2017, 02:42:09 pm »
Does sin(x) (with some parameters) describe water waves exactly, or does it just look kind of similar because they're both round and go up and down?

I can't find an answer to this simple question through google!

Have you ever come across Fourier decomposition? :-) I think I'd expect standing waves in 1D to be more or less sinusoidal, but I'm pretty sure you could generate other shapes of wave given an appropriate driving function. Obviously there's room for some error caused by friction and fluid viscosity and stuff. I managed to avoid having to study fluid dynamics as part of my engineering degree, though...

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General Discussion / Re: Random Stuff Part III
« on: February 02, 2017, 11:12:51 am »
Say the week goes from Monday to Sunday.

I got stuck at this part :-(

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General Discussion / Re: Random Stuff Part III
« on: December 07, 2016, 10:50:50 am »
@RR, if you don't like 2d integrals over the infinite plane in your die-rolling considerations, the easy way to visualise exactly what's going on with WW's example is to get some graph paper and colour in the squares. In the table below, the vertical axis is numbered for 1d8+1, and the horizontal axis is numbered for 1d10.

.123456789X
2#=OOOOOOOO
3##=OOOOOOO
4###=OOOOOO
5####=OOOOO
6#####=OOOO
7######=OOO
8#######=OO
9########=O

For any pair of dice, you're going to get the same pattern of having an equality line dividing the open "O" and closed "#" regions. Since any cell in this table is equally likely to get rolled (as long as you're using one fair die along each edge), then you just have to count up the open or closed cells and then divide by the total number (80) to get the actual probability.

You should be able to draw that kind of a diagram for any dice you like :-) It does kind of extend to having e.g. 2d6 on one edge, but then you have to worry about the area of each box (because the probabilities over the different numbers are no longer uniform), and add up areas rather than just counting cells.

PPE 1 -- ooh, hey, we're all thinking about nonuniform distributions now :-)

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General Discussion / Re: Random Stuff Part III
« on: December 03, 2016, 01:56:39 pm »
I had a dream tonight that made me remember about one beautiful and interesting game called Braid. Has anyone played? I highly recommend it, it's in my top-5 best games in the world!

I've played it! :-) I think Braid and Portal 2 are the only two computer games I've played in the last 10+ years! That doesn't count the odd browser game, and a lot of Ingress/Pokemon Go, of course...

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General Discussion / Re: Random Stuff Part III
« on: December 03, 2016, 01:50:14 pm »
An important question is what you're doing with your signal afterwards, though. If you're using it for some kind of analysis, can you just design the remainder of the pipeline to be robust/invariant to the noise, rather than requiring a pre-processing step that might also interfere with the informative part of the signal?

Simplifying my problem, I am trying to identify the number of times a given pulse shape appears in my signal, with that pulse shape occurring in clusters.  I have yet to try Wiener deconvolution (since I know my pulse shape and have a good estimate of my noise), that seems like the next logical step. Otherwise, I have to try wavelets and see what happens, although I have no experience with those.

I have tried to make the remainder of the pipeline more robust to the noise, that was my first approach, but I have only limited success because of that 50kHz, so that's why I am trying to approach the problem from that angle now.

How strong a constraint do you have on the exact pulse shape? Presumably not strong enough that you can just convolve the signal with that and look for peaks? Assuming not, maybe try
sliding window approach, with a windowing function -> fourier space -> match against a frequency profile for your signal that's robust to whatever's going on around 50kHz -> non-maximal suppression to get a count.

The objective function you're optimizing over in order to arrive at a denoised version of your original signal is almost certainly the wrong thing if what you actually want to do to the signal is just to count pulses. Even if the above outline of a plan isn't good enough, I feel that there ought to be a much better approach that utterly destroys most of the original signal, but is very good at making your desired pulses stand out, so that's what I'd be looking for. BTW, what software are you using for your investigation?

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General Discussion / Re: Random Stuff Part III
« on: December 02, 2016, 11:57:38 am »
I guess it would be too much to assume that you know how? Or, failing that, have a link?

I'm in image processing rather than 1D signals, but usually if you can characterize the statistical properties of your noise vs your signal, you're off to a good start. Often denoising relies on decomposing your signal into some kind of basis function representation, downweighting coefficients that represent the noise band, and reconstructing the original signal minus the noise from that. You say you've tried frequency space (FFTs?) already, so that's one related approach. You might investigate different windowing functions you could apply beforehand, too.

An important question is what you're doing with your signal afterwards, though. If you're using it for some kind of analysis, can you just design the remainder of the pipeline to be robust/invariant to the noise, rather than requiring a pre-processing step that might also interfere with the informative part of the signal?

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General Discussion / Re: Random Stuff Part III
« on: November 19, 2016, 01:15:05 pm »
It happened during the 1796 election, where nobody won, and John Adams ended up getting stuck with Thomas Jefferson as VP. It's an interesting time period too, because this election result basically formulated the 1-party system.

I know this from listening to Hamilton maaaaany times, and I'm not even American :-P

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