[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 - 1500. 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.

is there a finite amount of mathematical knowledge? Can you "solve" mathematics?
30 posts and 2 images submitted.
>>
>>8239866
idk but we've made enough progress to know that noserings look like shit

pic related
>>
>>8239866
If mathematics is ever solved then the mathematicians after that will generalize the problem of solving mathematics and then solve that and then generalize that problem too.
>>
>>8239866
Given an infinite amount of time, an immortal being ought to have the ability to gain all knowledge, whether the total amount of possible knowledge is finite or infinite. Since mathematical knowledge is a subset of all knowledge, then this immortal being could of course gain all mathematical knowledge.

If we consider the entirety of the human race as one continuous immortal being, then if the universe never ends in time and the human race continues to exist for eternity, it may be possible for us to one day gain all mathematical knowledge.

File: Cornell-Notes.png (8KB, 1700x2200px) Image search: [Google]
Cornell-Notes.png
8KB, 1700x2200px
What format do you guys take notes in?
24 posts and 3 images submitted.
>>
>>8239606
i'm not a retard, so i just use a plain notebook
>>
>>8239618
oh cool
>>
>cornell notes
t. brainlet

File: 2equals1.png (14KB, 525x410px) Image search: [Google]
2equals1.png
14KB, 525x410px
Can math explain everything? Even animals, plants, reality?
16 posts and 2 images submitted.
>>
It's safe to assume that it's the foundation of everything, including the things you've stated. As far as explaining goes, trying to understand the universe in purely mathematical terms is like trying to understand a computer program in binary language, you kind of need a higher order language to make sense of stuff.
>>
>>8239545
Can't explain it's own consistency or what a number is
>>
Statistics kinda can, but not really.

File: tmp_22007-prism2134269145.jpg (185KB, 1000x800px) Image search: [Google]
tmp_22007-prism2134269145.jpg
185KB, 1000x800px
How the actual fuck do these work?
16 posts and 1 images submitted.
>>
https://en.wikipedia.org/wiki/Dispersion_(optics)
>>
>>8239501
electrons, mainly
>>
>>8239501
Stick a needle in your eye to find out.

File: science.gif (2MB, 500x500px) Image search: [Google]
science.gif
2MB, 500x500px
ITT: We ask questions of science that are extremely hard to explain (but completely explainable).
21 posts and 3 images submitted.
>>
If a fly didn't have wings, would it be called a 'walk?'
>>
>>8239427
ELI5 what is a limit?
>>
if the #2 pencil is the most popular pencil, why is it still #2?

File: cipralex-yan-etkileri1.jpg (117KB, 910x575px) Image search: [Google]
cipralex-yan-etkileri1.jpg
117KB, 910x575px
https://en.wikipedia.org/wiki/Escitalopram
16 posts and 1 images submitted.
>>
As an SSRI it has mood-stabilizing properties that are achieved by delaying reuptake of the neurotransmitter serotonin in between nerves. This causes your neurons adapt to use less serotonin. The net consequence of those two things is that some neural pathways associated with depression and anxiety are active less often but more strongly. In this way it helps you control your mood without robbing you of emotion. At the beginning before your neurons adapt it you only get the mood-strengthening effect so it increases problems badly, but after adapting to it, it can help control your moods well. Unlike other drugs that treat the same issues it is not abusable. Oh, and you may need to switch around between a few of the drugs in this class to find one without intolerable side effects like drowsiness. People respond differently to the same drug.
>>
>>8239377
it's nothing more than a placebo for most persons who take the drug, as is true of the other SSRI's

read Irving Kirsch's book
>>
>>8240602
Here's Kirsch in 2014 about antidepressants (yes the 1st paragraph of the text body - not the abstract - is stupid, keep reading).
www.ncbi.nlm.nih.gov/pmc/articles/PMC4172306/

>the fact that most patients and doctors in clinical trials successfully break blind
(again the article is about antidepressants specifically)

This is discussed in the book, notable side effects, or lack thereof, allow patients to determine w/ up to 85% accuracy whether they are in the experimental or control group.
In other words, the trials are not blind despite the description 'random double blind clinical trial'.

>... we had data on unpublished trials as well as published trials.
>In the data sent to us by the FDA, only 43% of the trials showed a statistically significant benefit of drug over placebo. The remaining 57% were failed or negative trials.

More than half of the trials attempting to legitimize SSRI treatment of depression come up empty.

>Almost half of the clinical trials sponsored by the drug companies have not been published

Gee, I wonder why.
In the book it is made clear that there exists a huge publication bias toward positive results.

>The results of the unpublished trials were known only to the drug companies and the FDA, and most of them failed to find a significant benefit of drug over placebo.

Yeah, there it is.

>With this expanded data set, we found once again that 82% of the drug response was duplicated by placebo.

>the mean difference between drug and placebo was less than two points on the HAM-D. The HAM-D is a 17-item scale on which people can score from 0 to 53 points, depending on how depressed they are. A six-point difference can be obtained just by changes in sleep patterns, with no change in any other symptom of depression.

Lel, the 'instrument' that HAM-D purports to be, gives misleading 'measurements'.

More cunt/paste give an error, post too long message.
Keep reading.

File: lJG5wG6[1].jpg (24KB, 640x358px) Image search: [Google]
lJG5wG6[1].jpg
24KB, 640x358px
I figured out the answer.

Nowhere does it state that the probability is contained among the four options provided. At best it implies you would choose one of these at random, still without constraint that one of them is correct.

I propose to you, people of /sci/, that the answer is 0%
14 posts and 4 images submitted.
>>
>>8239360
it would be %100 then, dipshit
>>
File: Wein_ist_nom.jpg (33KB, 346x406px) Image search: [Google]
Wein_ist_nom.jpg
33KB, 346x406px
The correct answer is 50%.
The check boxes or Letters are seen as the set of possible answers.
If you have to choose at random you have 25% chance of getting it right. If the right answer is included twice in the set of 4 possible answers, you have a chance of getting 2 right out of 4, which is 50%.
>>
>>8241750
dipshit fgt pls

File: 1459480373537.jpg (96KB, 960x960px) Image search: [Google]
1459480373537.jpg
96KB, 960x960px
/sci/ What's the most you guys have had to write in one day?
48 posts and 1 images submitted.
>>
>>8239242
500 words, due tomorrow
>>
>>8239242
I actually have a 20 word essay due tomorrow and I haven't even started
>>
>>8239245
Are you being serious?

File: 1458865374260.png (39KB, 321x322px) Image search: [Google]
1458865374260.png
39KB, 321x322px
http://newsrescue.com/blacks-especially-igbos-prove-more-intelligent-than-whites-including-the-asian-leaders/

how do pol retards here react to this?

how do igbos fall under their IQ theories?
18 posts and 2 images submitted.
>>
>>8239235
>women/black people are underachieving, we have to do something!
>restructure school and university programs based on affirmative action/quotas/favoring minorities/women
>women/black people are now achieving more when the system is biased in their favor
>just right! women/black people are more intelligent than men/white people!
>>
>>8239243
>women/black people are now achieving more when the system is biased in their favor
So, they're dirty stupid monkeys with low IQ when the system is against them, and they're also not smarter than white when the system is working for them, because the system is working for them.
>>
>>8239243
>>8239251
not retard.
Do you even read it?

Igbos children on UK and USA score higher on the test that even asians.

File: To combine them all.jpg (14KB, 198x205px) Image search: [Google]
To combine them all.jpg
14KB, 198x205px
Hey anons,
we have a nice band of people here working on this
http://www.writeurl.com/text/6un773amggkc3zr2ejpy/wbdvympgflbebyiihalc

That is a only non mahtematical word version of what it is, and if you understand it, you will want to join in.
If it seems non sense to you at this time, we'll come back to you later.

Although it is mostly mathematics and will be, doesn't matter what branch of sciences you are in, you will be a great deal of help.

We'll let you know how to join if you show interest here.
29 posts and 2 images submitted.
>>
>>>/x/
>>
looks like autism
>>
it's timecube-tier shit
also

>4. An existence as our reality, except both of your right eyes have been replaced by a marble.
>both of your right eyes

heh'd

File: mome7.gif (5KB, 627x229px) Image search: [Google]
mome7.gif
5KB, 627x229px
It can be anything, from any field. I'll start with mine, the Pauli Exclusion Principle Wave Function
[eqn] \psi(x)=\sum_\sigma \int_{-\infty)^{\infty} \frac{d^3 k}{\sqrt{(2 \pi)^3} \sqrt{\frac{m c^2}{\hbar \omega_k}} (c_{\sigma}(k) u_\sigma e^{i k x}+d^\dagger_\sigma v_\sigma(k) e^{-i k x}) [eqn]
18 posts and 4 images submitted.
>>
Shit, I made a typo in my markup.
>>
>>8238971
[eqn] \psi(x)=\sum_\sigma \int_{-\infty)^{\infty} \frac{d^3 k}{\sqrt{(2 \pi)^3} \sqrt{\frac{m c^2}{\hbar \omega_k}} (c_{\sigma}(k) u_\sigma e^{i k x}+d^\dagger_\sigma v_\sigma(k) e^{-i k x}) [/eqn]
>>
>>8238973
[math] \psi(x)=\sum_\sigma \int_{-\infty)^{\infty} \frac{d^3 k}{\sqrt{(2 \pi)^3} \sqrt{\frac{m c^2}{\hbar \omega_k}} (c_{\sigma}(k) u_\sigma e^{i k x}+d^\dagger_\sigma v_\sigma(k) e^{-i k x}) [/math]

File: 6844684489.jpg (47KB, 640x353px) Image search: [Google]
6844684489.jpg
47KB, 640x353px
So we won't see the practical use of the alcubierre drive in our lifetimes?
42 posts and 4 images submitted.
>>
you mean ever..
>>
> Exotic matter
The Alcubierre drive is sadly just sci-fi. No matter how much we want to believe.
>>
>>8238928
>http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20110015936.pdf
>Conclusion
In this paper, the mathematical characteristics of the Alcubierre metric were introduced and discussed,
the canonical form was presented and explored, and the idea of a warp drive was even considered
within a higher dimensional manifold. The driving phenomenon was conjectured to be the boost field as
opposed to purely the York Time which resolved the asymmetry/symmetry paradox. An early idea of a
warp drive was briefly discussed within the context of mission planning to elucidate the impact such a
subsystem would have on the mission trade space. Finally, a laboratory experiment that might produce
a modest instantiation of the phenomenon was discussed.
>While it would appear that the model has
nearly all the desirable mathematical characteristics of a true interstellar space drive, the metric has one
less appealing characteristic – it violates all three energy conditions (strong, weak, and dominant [9])
because of the need for negative energy density

Sadly, this anon is right.

File: kickasstorrentarrest.jpg (100KB, 1600x900px) Image search: [Google]
kickasstorrentarrest.jpg
100KB, 1600x900px
Where do you get your textbooks online with all the recent crackdown on good torrent search engines?
28 posts and 4 images submitted.
>>
textbooks http://gen.lib.rus.ec/

journals http://sci-hub.bz/
>>
>>8238850
Thanks so much, m8
>>
>>8238837
>recent crackdown on good torrent search engines
This happened?

And, before you proceed to verbally abuse me, I'd like to say that I'm only an occasional pirate.

File: LainIfPeopleCanConnect.jpg (51KB, 704x510px) Image search: [Google]
LainIfPeopleCanConnect.jpg
51KB, 704x510px
The probability of any event occurring is 100% after you have the information that it has occurred.

Y/N?
48 posts and 3 images submitted.
>>
File: 1468889375565.jpg (27KB, 257x306px) Image search: [Google]
1468889375565.jpg
27KB, 257x306px
>>8238816
>He uses percentages for probability.
>>
>>8238819
unity/1

happy?
>>
>>8238816
That is a tautology you dimwit

File: pg37.jpg (199KB, 1000x1235px) Image search: [Google]
pg37.jpg
199KB, 1000x1235px
What the hell is up with vaults?

>found in almost all complex organisms
>tens of thousands per cell
>associated with drug resistance, cell movement, inter and extracellular transport, immunity, signalling

but

>knock out all the proteins to make them in mice, and they're fine
>happens to not be in fruit flies, common yeast, C. elegans and thale cress, four of the organisms we use most extensively in genetic research
>knockdown doesn't actually seem to reduce drug resistance
36 posts and 2 images submitted.
>>
>>8238764
This is the first time I've ever heard of these things, but I know that in some cases gene knock outs are compensated by overexpression of other genes that have similar functions. Somebody should do some knock down studies on these things and see what happens.
Also, I would like to see what other types of proteins and stuff these things interact with. Any good articles you can point me to?
>>
>>8238808
Just this one: http://www.the-scientist.com/?articles.view/articleNo/40599/title/A-Vaulted-Mystery/

I only found out about them today too, and I'm surprised I've never seen them mentioned in any writing about cell structures before.
>>
>>8238868
I see. Makes you wonder about what else is out there.

Pages: [First page] [Previous page] [1490] [1491] [1492] [1493] [1494] [1495] [1496] [1497] [1498] [1499] [1500] [1501] [1502] [1503] [1504] [1505] [1506] [1507] [1508] [1509] [1510] [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.