[Boards: 3 / a / aco / adv / an / asp / b / bant / biz / c / can / cgl / ck / cm / co / cock / d / diy / e / fa / fap / fit / fitlit / g / gd / gif / h / hc / his / hm / hr / i / ic / int / jp / k / lgbt / lit / m / mlp / mlpol / mo / mtv / mu / n / news / o / out / outsoc / p / po / pol / qa / qst / r / r9k / s / s4s / sci / soc / sp / spa / t / tg / toy / trash / trv / tv / u / v / vg / vint / vip / vp / vr / w / wg / wsg / wsr / x / y ] [Search | Free Show | Home]

Archived threads in /sci/ - Science & Math - 16. page

This is a blue board which means that it's for everybody (Safe For Work content only). If you see any adult content, please report it.

File: books-20clip-20art-jixpyXdiE.png (71KB, 1152x757px) Image search: [Google]
books-20clip-20art-jixpyXdiE.png
71KB, 1152x757px
where do you guys torrent academic books? I've been looking for A short guide to writing about biology everywhere and I cant find it
4 posts and 1 images submitted.
>>
>>9152925
https://thepiratebay.org/

or libgen
>>
>>9152943
>▶
>>>9152925 (OP)
>https://thepiratebay.org/
>or libgen
no luck with those already tried
>>
>>9152925
I did find this for you OP, maybe it will suffice instead?

http://usfsm.edu/wp-content/uploads/2013/09/A-Guide-to-Writing-Research-Reports-in-Biology-General-Rules.pdf

File: atom-molecule-vibration.gif (479KB, 440x220px) Image search: [Google]
atom-molecule-vibration.gif
479KB, 440x220px
>molecules just vibrating all over the place

what the fuck's their problem?
5 posts and 1 images submitted.
>>
They're too hot.
>>
If they didn't the universe probably wouldn't function
>>
>>9152871
bedsores

File: physics and math equations.jpg (578KB, 2560x1440px) Image search: [Google]
physics and math equations.jpg
578KB, 2560x1440px
I never learned to study in high school, because it came easily. People told me this would change in college, but it didn't really, I procrastinated and last-minute-studied just as much and was completely fine. How bad is grad school going to fuck me?
5 posts and 1 images submitted.
>>
>>9152869
like a cheap whore
>>
>>9153063
feelsbadman
>>
>>9152869
this image is beautiful, saved without your permission

File: aplus.jpg (7KB, 276x183px) Image search: [Google]
aplus.jpg
7KB, 276x183px
I am struggling to see whether or not all complete ordered fields are complete metric spaces as well.

Let there exist a set S, where we have multiplication, and addition such that it is a field. Let us give it a total ordering </= ($\leq$ if TeX works here). Then S is an ordered field.

Moreover, let S be a complete ordered field, ie: given any nonempty subset T of S, if the set of upper bounds of the set T is nonempty, then the set of upper bounds possesses a least element.

Claim: The same set S, when equipped with a metric d, is a metric space. Furthermore, (S,d) is a complete metric space (every cauchy sequence in it converges.)

I can't formally get a proof for this, nor can I think of any counter examples. This question is really interesting to me, and it's already taken away so much of my time from actual classwork. I'd really appreciate any help!
4 posts and 1 images submitted.
>>
>>9152850
What have you tried to prove it?
I would think you could copy the proof (that all cauchy sequences are convergent) for R verbatim to any field with LUB property and it would work.
>>
>>9152850
hey. you seem to know much about function spaces. can you help me with my qeustion ? :
Im not a mathematician.
I have an integral of a function, divided by a gamma function. It is a new function.

I interpret it like this: because I can integrate the function I can write the new function in a complete space without the loss of generality and write it as a linear combination of the basis functions. Then I can use the Parseval Identity to do scalar multiplication with functions in that space, right ?

I mean, can I just say that there is a such a space, in which this function can be written ?
>>
>>9152850
Any complete ordered field is isomorphic to the real numbers, so yes.

File: bigpissbiggerdick.jpg (413KB, 1000x1000px) Image search: [Google]
bigpissbiggerdick.jpg
413KB, 1000x1000px
is there a site or something that would allow me to work on math daily like i did back in grade school?
a few years out of hs and my math ability is tanking fast
3 posts and 1 images submitted.
>>
for reference i have taken through calc 2 in post secondary and have exhausted the calc 3 resources on the wiki
>>
bloop https://www.wolframalpha.com/problem-generator/
if that doesnt cut it, just search for problem sheets on whatever youre trying to learn

File: 1504721652079-1985551033.jpg (2MB, 1836x3264px) Image search: [Google]
1504721652079-1985551033.jpg
2MB, 1836x3264px
So for my Engineering Development and Design class, we are taking on the task of solving one of our issues on a daily basis that are mechanical.

>inb4 can you fix my parents being divorced

In the stage we are in right now, we are researching what our top five problems are faced the most by others on a daily basis.

I would request that you only choose one of the five problems below, and actually argue against the issue or give your own opinions on the problems.

1. Seat Belt Buckles Burning.
2. Stuff falling between the seats of our car.
3. Someone coming into your room and not shutting the door.
4. Sun visor in your car being a hassle to put on and off.
5. Sliding doors coming off their track.
4 posts and 1 images submitted.
>>
#3 seems easy enough
>>
For anyone asking, NO this is not a post to not research the problems above, this is just a poll to see what is the most problematic among the majority.

This is basically our research before the actual research.
>>
2
good luck with the poll

File: IMG-20170906-WA0007.jpg (16KB, 400x383px) Image search: [Google]
IMG-20170906-WA0007.jpg
16KB, 400x383px
I'm trying to show that the absolute val. of a polynomial's roots are less than the maximum abs. val. of coeficcient, can anyone help
3 posts and 1 images submitted.
>>
>>9152727
>>>/hm/ for homework help
>>
Your question is entirely unclear, but chances are your can solve it by expressing the coefficients in terms of the roots by a factorization alla vieta

E.g.
(a-x)(b-x)c=abc-bcx+...

wow do I keep my IQ constant
5 posts and 1 images submitted.
>>
>>9152661
No. Go die
>>
how I meant
>>
>>9152661
exercise. especially weightlifting

File: 1501787934103.jpg (61KB, 644x700px) Image search: [Google]
1501787934103.jpg
61KB, 644x700px
Tell me about semen and testosterone production

What are the mechanisms and precursors? Where do they originate in the body? I know semen is obviously made in the testes, but what are the mechanisms in place before that happens? And testosterone? Looking for the biology and physiology experts really.

I made this in /fit/ originally but that was a mistake, and honestly this isn't so much about fitness as it is just biology information.

Thank you
4 posts and 3 images submitted.
>>
Your question is so diffuse and weird that it is impossible to answer. If you want to learn about the physiology of testicles, just google it.
>>
File: 1.jpg (27KB, 852x480px) Image search: [Google]
1.jpg
27KB, 852x480px
>>9152556
>visual arousal stimulates dopamine which sends signals to the testes to produce more testosterone, also sends signals to the pituitary gland to produce serotonin, a testosterone precursor
>the seondary glands for testosterone production are found in X organs, the trapezius muscles cluster and the glute muscles cluster
>oxygenation in the blood is the main precursor to semen production

Was looking for something like that desu, but not just completely made up on the spot.
>>
File: F1.large[1].jpg (183KB, 1023x1280px) Image search: [Google]
F1.large[1].jpg
183KB, 1023x1280px
>>9152556
>>9152570
Wow I'm good

File: 618px-MSRE_Reactor.jpg (100KB, 618x480px) Image search: [Google]
618px-MSRE_Reactor.jpg
100KB, 618x480px
Were they a meme all this time? In the past month I've been reading and it seems like corrosion is an issue Hastelloy N seems to be the solution, and some lithium alloys that are made in Russia as well.

Then there's also the decay products that may react with the material out which the piping and reactor is built.

Oh, and salts freezing in the piping and the reactor when criticality stops. ORNL Wanted to heat up the pipes in order to avoid this, but this destroys the passive safety idea of "If you lose power to the LFTR, it all drains away in the safety tank.". Yeah if you lose power, the heaters will stop heating the salt. Some russian submarine reactors got destroyed by this.

Also, proliferation seems to be a concern to some. In order to kick-start the reactor you need a seed material. How is India going to start its reactors when they aren't allowed to have any u235 at all?

And of course, let's not forget the cost issues.
Let's see if China will start shipping these things like they do iPhones.
3 posts and 1 images submitted.
>>
>bump
>>
>>9152537
>Were they a meme all this time?
Yes, we were telling you they were a meme all along. They're just breeder reactors, with all the implied advantages, complexity, and proliferation issues, and uranium-based breeders are a much more developed technology.

>How is India going to start its reactors when they aren't allowed to have any u235 at all?
They have U235 and Pu239. They have nuclear weapons. They're already breeding U233 from thorium in their CANDU reactors. Anyway, uranium can be produced by seawater extraction or weak acid leaching of granite, it's just more expensive than mining from good deposits. The raw fuel cost is such a small part of nuclear power that it doesn't really matter.

File: evidence based.png (96KB, 765x773px) Image search: [Google]
evidence based.png
96KB, 765x773px
Is evidence based medicine the way to go?
3 posts and 1 images submitted.
>>
>>9152342
The science of physics shews that falling from a great height without a parachute is likely to be fatal.
>>
>>9152342
Yes

File: my science project.png (11KB, 435x329px) Image search: [Google]
my science project.png
11KB, 435x329px
Hey /sci/,
What do you think of my science project. Any improvements you can suggest?
Thanks
4 posts and 1 images submitted.
>>
>>9152309
The first concentration value is different in the two columns (0.97 vs. 0.96). Check your rounding. Is this the correct number of significant digits? The deltas should be the same precision. How did you calculate the deltas? Isn't the first value should be 0.97-0.88=0.09?
>>
>>9152309
units
>>
>>9152309
What level are you? Highschool?
>No more than 3 significant figures
>Format so it's in index form
>Units where???
>Time / s not t

You doing some sort of enzyme kinetics?

File: BSOD.jpg (346KB, 1920x1080px) Image search: [Google]
BSOD.jpg
346KB, 1920x1080px
Post topics and the book you used
>Calculus
Stewart Calculus Concepts & Contexts
>Multivariable Calculus
Stewart Multivariable Calculus
>Electronics
Hambley EE: Principles & Applications
3 posts and 1 images submitted.
>>
>calc
Highschool textbook
>anal 1,2,3
Tao, Rudin, Demidovich for excercises
>topo
Munkres
>lingebra 1&2
Shilov
>algebra 1&2
Lang's graduate
>intro to geometry
Pressley, Klingenberg
>intro to commutative rings
Zariski
>algebraic curves
Fulton, Hassett, Shafarevich
>intro to group theory
Rotman, Hall, Isaacs
>t. yuropoor undergrad
>>
>>9152275
>Algebra
Artin
>Analysis
Rudin
>Topology
Munkres
>Mechanics
Taylor
>EM
Griffiths
>QM
Griffiths+Sakurai
>Thermal
Schroeder
>Electronics
Sedra and Smith
>C++
Deitel and Deitel

File: DanceBabyDance.gif (322KB, 200x230px) Image search: [Google]
DanceBabyDance.gif
322KB, 200x230px
Memetics

Hi 4chan. What's your take on memetics as a field of study? Is there any validity to it?
Also, do you think the shorter and shorter durations of modern memes are a stable trend?
4 posts and 3 images submitted.
>>
File: PepeIsDead.jpg (215KB, 970x845px) Image search: [Google]
PepeIsDead.jpg
215KB, 970x845px
memes are dead, idiot
>>
File: fred.jpg (37KB, 217x319px) Image search: [Google]
fred.jpg
37KB, 217x319px
memes are fred, idiot
>>
this >>9152186
now that normies have the memes, it's over

File: collectiveIQof1000.jpg (123KB, 1280x720px) Image search: [Google]
collectiveIQof1000.jpg
123KB, 1280x720px
>adviser: Sorry anon, I don't have any projects that I need students to help with
>adviser: Sorry anon, I don't know of any internships for you to work at this summer
>find out that adviser has multiple research projects in progress with students
>adviser hooked up multiple students with internships

So either my adviser is a sociopath trying to sabotage me.... or I'm an autistic fuck and hes trying to find polite ways to not work with me.
5 posts and 1 images submitted.
>>
>>9152082
Or maybe they were turbo autists compared to your regular autism and took all the oppotunities before you could ask?

but yeah, sounds like he doesn't like you that much.
>>
it's almost certainly not the former, and much more likely to be the latter. in all honesty, working with a professor starts first with office hour visits where you get along, i.e. personalities work together, not necessarily similar research interests.
>>
>>9152082

People say, "the best revenge is success". They lie. Kill him. Kill him and eat his skin.

Pages: [First page] [Previous page] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20] [21] [22] [23] [24] [25] [26] [Next page] [Last page]

[Boards: 3 / a / aco / adv / an / asp / b / bant / biz / c / can / cgl / ck / cm / co / cock / d / diy / e / fa / fap / fit / fitlit / g / gd / gif / h / hc / his / hm / hr / i / ic / int / jp / k / lgbt / lit / m / mlp / mlpol / mo / mtv / mu / n / news / o / out / outsoc / p / po / pol / qa / qst / r / r9k / s / s4s / sci / soc / sp / spa / t / tg / toy / trash / trv / tv / u / v / vg / vint / vip / vp / vr / w / wg / wsg / wsr / x / y] [Search | Top | Home]

I'm aware that Imgur.com will stop allowing adult images since 15th of May. I'm taking actions to backup as much data as possible.
Read more on this topic here - https://archived.moe/talk/thread/1694/


If you need a post removed click on it's [Report] button and follow the instruction.
DMCA Content Takedown via dmca.com
All images are hosted on imgur.com.
If you like this website please support us by donating with Bitcoins at 16mKtbZiwW52BLkibtCr8jUg2KVUMTxVQ5
All trademarks and copyrights on this page are owned by their respective parties.
Images uploaded are the responsibility of the Poster. Comments are owned by the Poster.
This is a 4chan archive - all of the content originated from that site.
This means that RandomArchive shows their content, archived.
If you need information for a Poster - contact them.