Archived threads in /sci/ - Science & Math - 10. page

File: Screenshot 2017-09-10 22.59.12.png (74KB, 1600x868px) Image search: [Google]

74KB, 1600x868px

Wouldn't it make more sense for RR and RL to switch places? I don't understand why the naming convention for itineraries is like this.

I'm assuming it makes things easier somewhere.

File: 98fb9834b9430afd23cb2a294bd9ce6f.jpg (182KB, 1200x845px) Image search: [Google]

182KB, 1200x845px

What's one way to solve any problem whether it be the Riemann zeta function, to interpersonal problems in society, to the anxiousness about a lack of meaning?

Killing yourself. The act of killing one's self is the same as having a cake and eating it too. Everything is fixed. The problems are solved, because if you're dead, the problems couldn't have existed in the first place.

There's absolutely no reason not to take some aspirin and slit your wrists vertically in the hot shower right now.

File: lething.png (12KB, 969x741px) Image search: [Google]

12KB, 969x741px

You sail 825m south.
Then you turn and head 60 degrees West of North for 1250m...

how many meters are you from the island that you first set sail from?

File: maxresdefault.jpg (137KB, 1280x720px) Image search: [Google]

137KB, 1280x720px

Why is there so much bias in the scientific community towards women?

Ugly women make the best physicists because they're too ugly to be whores and males are always looking for something to stick their dick in, regardless of social standing, so they can get distracted.

Ugly women are the next best thing to androids when it comes to science.

File: wu.jpg (23KB, 480x502px) Image search: [Google]

23KB, 480x502px

>certain combinations of wave functions are illegal

File: aaronson.jpg (23KB, 333x499px) Image search: [Google]

23KB, 333x499px

anyone read this? does it live up to the hype?

File: 1504568670525.jpg (20KB, 371x282px) Image search: [Google]

20KB, 371x282px

So how does everyone here memorize things, I've always had issues studying a paper to memorize a list of stuff, be it chemical names, a list of numbers, or formulas, particularly the latter. It's beginning to cause problems in calc 2, as the sheer number of formulae/ substitutions are overwhelming. I can manipulate the integrals just fine, but I find myself checking back on my notes for, what seems to be, every problem. What are some strategies that /sci/ uses to remember large quantities of information?

File: global warming.jpg (276KB, 1280x720px) Image search: [Google]

276KB, 1280x720px

In the last few days I have been running small scale experiments in my home town based on how the climate change disaster will impact us.
Essentially, I have spent time at the nearby supermarket, intentionally damaging or removing foods that will be lost when we have the disasters that await, and then watching the reactions.

Day 1: Removed tins of coconut milk from the shelves, removed bottles of fish sauce and some other Thai and South Asian ingredients. Hypothosis: These are the first items to be 'lost' by the events of climate change as they are in the hot zones. Notes: Most people who came looking were not too disturbed. One individual thought he saw fish sauce at the back shelf but it was actually soy sauce I had placed there - I believe this demonstrates the 'folly' of seeing technological fixes as a way to prevent the issues with climate change. Overall, I was not too concerned on day 1 and even had hope

Day 2: Plastered fake 'possibly radioactive' stickers on produce from Indian subcontinent and removed some items from Bangladesh Hypothosis: India and Pakistan will have a nuclear skirmish due to climate change therefore irradiating food Notes: Many people seemed confused and did not purchase the products. Had to cut experiment short because a man spoke to a staff member then pointed at me. Overall I believe that this proves people cannot understand the way climate change harms the food supply.

Day 3: Entered supermarket late at night and poured ants into the carrots. Hypothosis: This represents pests becoming widespread due to the warming climate in the north Notes: Nobody took the carrots and seemed disgusted. Clearly proves people will not eat pested crops and may resort to cannibalistic behaviour within 3 days of the collapse.

This is a small experiment but I think is telling.

File: Small_loan_of_a_million_keks.jpg (42KB, 600x526px) Image search: [Google]

42KB, 600x526px

If I'm out of university and want to learn basic applied maths a it's taught to physics students, which textbook is best? Are MOOCs acceptable?

File: MATA.gif (20KB, 644x652px) Image search: [Google]

20KB, 644x652px

Is it possible to create one book/website that will contain complete mathematics so when you read it from page one to page lets say 20000, you can know all math theorems, axioms, formulas and laws in all its fields? (Assuming you have perfect memory and logical reasoning)

File: file.png (77KB, 429x406px) Image search: [Google]

77KB, 429x406px

I'm trying to understand this paper: http://academics.wellesley.edu/Physics/brown/pubs/effalgV92P2698-P2701.pdf

The author describes a way of calculating the Constant-Q Transform of a signal by calculating temporal kernels and finding their Fourier transforms to get the spectral kernels.

The part where the temporal kernels are calculated and graphed is where I'm lost. For whatever reason, there are 2048 samples on the graph, despite there being only 512 FFT bins implying the FFT from temporal to spectral kernels was done on a 1024 sample temporal kernel.

The angular frequencies appearing in Eq. 4 are all well over 2 pi rad/s, so these kernels are undersampled. I don't know if that's a problem or not.

I'm trying to write MATLAB code to calculate some spectral kernels of my own. It can be found at https://pastebin.com/dxUVx4Ar
Every so often, one of the center frequencies is a multiple of 2 pi, so the complex exponential is 1 across all frequencies, leaving the temporal kernel as simply the Hamming window. This never appears to happen in the attached graph.

Of course, I wouldn't be asking if my spectral kernels looked like those in the paper. They don't.

So what's going on? I'm stumped.

File: Stick professor.png (6KB, 299x300px) Image search: [Google]

6KB, 299x300px

What's the part of the equation called that must be solved in order to find the answer? Ex. 12/4+15=x
What is the technical name for the equation of 12/4 within the bigger equation of x?
Pic not related.

File: 1498525176057.jpg (8KB, 240x240px) Image search: [Google]

8KB, 240x240px

Brainlet here. What's the difference between system thinking and pattern recognition?

File: butee.jif.gif (2MB, 465x394px) Image search: [Google]

2MB, 465x394px

I need a cartesian graph of a booty pls help 4chan

File: 507066619.jpg (358KB, 1024x683px) Image search: [Google]

358KB, 1024x683px

did college introduce you to interesting subjects you never were exposed to before? did it change your preexisting impressions of certain fields?