Archived threads in /sci/ - Science & Math - 17. page
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Share your lab stories. Here's mine:
First genetics lab. We need to rip the heads off from Drosophila pupae for their gigantic chromosomes. One girl with Aspergers starts crying and yells that she's going to quit because it's so wrong, fruit flies have freedom to live too. She lies down on floor and then hides underneath a table.
First biochem lab. The same assburger loses her mind because cheap Chinese plastic tubes melt in the PCR device. She starts crying and hides underneath the laminar. After 30 mins she starts to tell everyone about Aspergers, her hypothyroidism, how her feelings are completely justified etc. The lab assistant and lecturer sigh in despair.
Animal physiology lab. A small blood sample made her faint and cry. Frog decapitation and dissection makes her vomit and rage quit the course. The lab teachers are extremely patient, but she is constantly testing them with her stupid shit.
And after all this she specialized in animal physiology because "genetics has too much math".
>>8180159
For the last one, someone really should have told her before she wasted time with that major that she would be dissecting dead things to study their insides. How expensive is this uni?
>>8180166
10 000 € per year
My only experience in lab as an undergraduate is that I don't generally trust my lab partners so I prefer to do the lab myself.
Inconsistencies that throw off results piss me off, and my partners usually want to finish in a hurry and leave before lab ends so I tell them to act occupied and let me type the reports and perform the lab, unless my partner has integrity to do it right the first time.... Sounds jerkish but I've been screwed by relying on lab partners before
Can someone explain what the notation h'(x)->infinity as x->0- means based on this graph?
I would expect it the line to be going straight up if h'(x) is approaching infinity when x approaches 0 from the left?
Is it to the right of 0 x is approaching infinity and to the left of 0 x approaches infinity? Of course, that's it, but have you ever seen it described this way? seems fucking returded
>>8196712
the superscript tells you which direction the limit approaches from
0+ means you're coming in from the right (more positive side)
0- means you're coming in from the left (more negative)
>>8196728
and so h'(x) going to infinity as x goes to 0- means that the graph approaches a vertical line as you approach 0 from the left
I keep seeing all these magical 'POWER YOUR OWN HOME FREE TESLA GENERATOR INFINITE ENERGY AWAKED YOUR PINEAL GLAND FORBIDDEN KNOWLEDGE' on Youtube, and surprise surprise they all turn out to be bullshit.
So I figured I'd ask here, is there such a thing as a fancy generator that I could build and use at home?
By fancy I mean something that isn't basic like wind or solar.
>>8196389
Yes
![NationalGeographic_1385126[1].jpg](https://i.imgur.com/76NTM6J.jpg "NationalGeographic_1385126[1].jpg")
>tfw coelacanth is actually invertebrate.
Damnit, science, are there any other fake vertebrates you neglected to tell me about?
Good thread, OP.
>>8194341
I've opened this thread like 4 times trying to think of another one like that and failed every time.
>>8193699
https://en.wikipedia.org/wiki/Coelacanth
>Phylum:Chordata
Pic Related
I feel like I have some very important work to do, but I don't know what it is.
I know that once I figure out what I'm supposed to do I will excel at it..but I can't figure out what it is. I've been sitting here all day and no ideas came to mind. Anyone else feel the same?
Maybe you are destined to sit for living?
find out if gravitons exist like the standard model of the universe predicts
I think I can understand OP. I always feel like I "should" be doing something to learn something new or useful on my own, but I'm too lazy to ever do any extra work and I can never decide on a topic that I want to study on my own.
The few times I'm ever successful is when I just pick a topic and run with it. I think the majority of the difficulty comes from deciding on and starting something. I guess I need more of a "just do it" kind of attitude.
>be me
>in intro to physics class
>calc based classical mechanics
>after first week there are only 13 people in my class
>only 7 in my lab
So what gives /sci/? I know a smaller class is better for learning, engagement and building a relationship with the professor. But by the looks of it there is only going to be 3 people in an upper level class. Is physics becoming a meme degree? I also noticed it's a huge sausage fest.
>>8196381
Calc Phys 1 is a high school course and maybe there aren't many students who need remedial education.
Or your university is a meme.
>>8196386
fuck off eurocuck
>>8196387
he is no eurocuck because in europe calc 1 is supposed to be known in uni or else yo can't enter and this is because we are better than others (murica)
So how do you all feel about the Juno spacecraft mission? What are you hoping the results will be?
>>8196047
I hope we gather a lot of data on Jupiter's core, water content, and atmosphere. Also, some semi-decent pictures.
>>8196047
>What are you hoping the results will be?
Pornographic closeups of the storm systems.
Hint it's multi stage
i see loss
I can't believe no ones done it I thought 4chan people were smart
>>8195634
/sci/ is where retards go to act smart and smart people go to act like retards
You find yourself in a situation where you have managed to produce a correct, constructive proof that P = NP by providing a polynomial-time algorithm for an NP-complete problem. Let's also say that this algorithm happens to have an extremely practical running time, say O(n^2).
Ignoring whether or not this is possible, what would be the 'right' plan of action to take in this situation? Such a solution would have an extreme effect not only on the academic sphere, but also on the life (and potentially safety and privacy) of people around the globe. Do you...
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>>8195552
sell it to the highest bidder
>>8195570
Is that really the most intelligent option? A capable enough bidder could just then use your algorithm and a bit of social engineering to take that money back.
>>8195552
you (d) talk to a professor to check it out and tell you why you're retarded
>>8195270
>So now you don't understand GR, QM or geometry.
The balloon's surface is composed of finite points. It is not magic, it is a balloon.
>>8195271
>Ok, give me the reference frame where the universe is stationary and I will always be able to give you one where it is not.
I can think of no instance where the universe as a whole has changed its location in any spatial direction. Therefore it has undergone no motion,...
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>>8195283
>The balloon's surface is composed of finite points.
Defend this statemate. It can be representated in uncountably infinite real space, there's no reason to assign a finite number of points over an infinite.
>>8195304
The balloon is a finite object occupying a finite number of the universe's possible positions. The universe does not afford infinite precision or infinite subdivision of space between two arbitrary points.
If the balloon exists in a vacuum that is otherwise the rest state and minimum excistation of its underlying fields, as you expand the balloon you're just distributing the excitation gradient of its components more widely. The balloon is not gaining new energy, nor does it gain new points. It just...
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>>8195315
(A finite range, and quantized state.)
Hello. I would like to discuss the problem of developing AI with some experts if possible. Am a comp sci student and recently started an Algorithms course referencing Introduction to Algorithms by Cormen, second edition.
We had a session on few of Turing's papers a while ago and as I recall he considered the brain to be a finite-state machine and hence emulatable. I got not problem with this line of thinking.
The algorithm course however introduces NP complete problems that do not have a computational procedure that always give the efficient solution. This got me thinking that wouldn't a self dependant AI need to make its own algorithms? Does there exist an algorithm for algorithm designing with even partial emulation of human logic?
I understand self learning machines exist but don't they just copy what humans do? What happens when a new unknown situation arises?
Example of an NP complete problem from the book:
Given a central warehouse and a delivery truck. Find the most efficient route to deliver goods each day.
>>8195273
Unfortunately, humans already taught them and built them almost everything they need. This isn't 1940 anymore. They are going to takeover.
Self bump. Anyone can participate or ask stuff.
To add to my previous point, isn't the need for a step by step procedure the result of sequential processing by computers at an hardware level? Are there different system designs available?
I think the brain uses analogous signals rather than discrete. This would explain its huge capacity and imprecision. Would an analogous computer be better equipped to emulate human logic?
>>8195305
Atm a human solves the problem I mentioned better than a computer if...
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>>8195305
I wish popsci horseshit would leave /sci/.
>yfw you realize all it takes is a couple drops of semen for a woman to LITERALLY grow another human being, bones organs skin hair teeth and all inside of her
Why is sexual reproduction so disgusting and horrifying?
> because we don't need more information than a single strand of DNA to create human
apologize and never reproduce
>>8194706
>all it takes
You do realize you must consume one baby's worth of raw material (actually more) to create a baby, right? The body is alchemy more than it is magic.
>>8194706
>disgusting and horrifying?
Because it's like most other things in nature.
Well, an old puzzle my father and I were trying to solve. It was a bonus question from my physics class last year but I can't remember the solution.
A skier of mass m is on a snowball of radius r. He begins to slide down the snowball, at what angle does he lose contact with the snowball?
45 degrees
>>8194615
360 degrees sempai
GRAVITY IS PULLING HIM DOWN NO MATTER WHERE HE IS ON THE SNOWBALL, HE HAS NO INWARD ACCELERATION, HE LOSES CONTACT AT 90 DEGREES IF NORTH IS 0.
so I've been thinking about how fiction other than star wars rationalizes the idea of lightsabers actually working
the usual problem that arises when thinking about how to make one that actually works (using just a high-powered laser for a blade, not contained plasma) is "the blade will never end"
but is it impossible to contain a laser beam? could you not potentially build some kind of containment unit to cap the blade, with a photovoltaic system to reduce energy loss?
>>8194606
I've thought about this.
IF you could get a high enough power laser, you could have a small bar run parallel to it, with a lens on the top. The lens(or set of lenses) would be concave(toward the laser) and refract the light, spreading out the beam over a large area so it is virtually harmless.
Of course, nobody wants a metal beam on their light-saber. But that's the only practical way I see.
>>8194636
the laser blade literally is extendable. Why not just have the laser surround the metal bar, and the energy is obviously so concentrated you can't see through it, so the bar in the center is concealed? As it extends, the blade grows in length
>>8194705
picatar relatid
>all processes are reversible
Is this the worst science meme?
If you write something on a paper then burn that paper and disintegrate the remains with a blast of water no amount of effort will ever retrieve what was written on that paper.
>>8194110
>big crunch
/thread
>>8194110
>all processes are reversible
Whoever says this should kill themselves, then reverse the process.
>>8194110
I really don't think they meant physical processes
