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/sci/ - Science & Math

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11395692 No.11395692 [DELETED]  [Reply] [Original] [archived.moe]

Does anyone have the 5th edition of Gazzaniga's "Cognitive neuroscience: the biology of the mind"?

>> No.11395709

Check myanonamouse

>> No.11395715

I can't since I'm not a member therefore asking here

>> No.11395790


>> No.11395793

>gas a nigga
Is that his real name?

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11395661 No.11395661 [Reply] [Original] [archived.moe]

Why do more viruses not spread via mosquito? The outside surface of the proboscis presumably gets coated by blood and other bodily fluids, and then pushes into the bloodstream of other hosts.
Why doesn't coronavirus, for example, spread via mosquito, when it apparently lasts for so long outside the human body.

>> No.11395720
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west nile

>> No.11395734

not virus, but yeah west nile.

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11395655 No.11395655 [Reply] [Original] [archived.moe]

How is math, physics, and engineering related to Wall Street finance?

>> No.11395663

they are not, wall street jews are literally gamblers

>> No.11395717

Then whats the deal with all the quantfags now?

>> No.11395737

High frequency trading has made some people very, very rich.
That requires math and engineering skill.

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11395641 No.11395641 [Reply] [Original] [archived.moe]

>> No.11395647

Is coffee good for you?

>> No.11395651

Yes (i think).

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11395637 No.11395637 [Reply] [Original] [archived.moe]

>Western children first show signs of mirror self-recognition (MSR) from 18 to 24 months of age, the benchmark index of emerging self-concept. Such signs include self-oriented behaviors while looking at the mirror to touch or remove a mark surreptitiously placed on the child’s face. The authors attempted to replicate this finding across cultures using a simplified version of the classic “mark test.” In Experiment 1, Kenyan children (N= 82, 18 to 72 months old) display a pronounced absence of spontaneous self-oriented behaviors toward the mark. In Experiment 2, the authors tested children in Fiji, Saint Lucia, Grenada, and Peru (N= 133, 36 to 55 months old), as well as children from urban United States and rural Canada. As expected from existing reports, a majority of the Canadian and American children demonstrate spontaneous self-oriented behaviors toward the mark. However, markedly fewer children from the non-Western rural sites demonstrate such behaviors.
From: https://www2.psych.ubc.ca/~henrich/pdfs/Journal%20of%20Cross-Cultural%20Psychology-2010-Broesch-%20Cultural%20Variations%20in%20Children%27s%20Mirror%20Self-Recognition.pdf

why can't kenyan children recognize themselves at such a young age when western children can?

14 replies omitted. Click Reply to view.
>> No.11395964

Spotted the Kenyan. How are you even posting here? Are you generating power with a giant hamster wheel?

>> No.11395967

>Empirical and experimental data
>Not science

>> No.11395968

Smoke and mirrors

>> No.11395971

Psychology was never science. Maybe it will be in the future but your race won't live to see it.

>> No.11395975

These results suggest that there are
profound cross-cultural differences in the meaning of the MSR test, questioning the validity of
the mark test as a universal index of self-concept in children’s development

Right there in the fucking abstract. Why didn't OP include this i wonder why I really do

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11395636 No.11395636 [Reply] [Original] [archived.moe]

This isn't a iq test or anything, I'm just curious on what maths or science caused this to happen; while I was spinning my keys around my finger, two of my key rings (one large (ring two) and one small (ring three)) on my main key ring (the same size as the larger key ring (ring one)) became interlocked with one another, when before the two (ring two and ring three) were not. How did this happen? I'm preplexed and thought to give /sci/ a go at it.

>> No.11395939

most likely just a coincidence if you are being honest about having no intentions

>> No.11395990

It's impossible for two rings to loop round each others' ring without either ring being able to open, regardless of other rings that may be attached. When you say interlocked, what do you mean by this?

>> No.11396177

>topological homeomorphisms

there, now no one has to bait topologyfags

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11395591 No.11395591 [Reply] [Original] [archived.moe]

I know there have been a couple boards before but I didn't read them because I wasn't interested at the time. Does anyone here have a protocol that seems to work?

Also, does anyone here know anything about how sugar might damage the brain?

Also one more question /sci/ When will we have have replicators? Thanks

>> No.11395609

they're just a fad for losers who are lazy.

>> No.11395630

Proper sleep, clean diet, regular exercise and meditation, and keeping your mind sharp and focused through challenging mental work each day will do infintely more for your mind, body, and cognative abilities than some placebo “stack”.

Only after doing all of this would I recommend even thinking of trying to find substances to give you an edge. Fools try to cheat their way there, but there’s no real shortcut to the top.

>> No.11395706

Aerobic exercise and mental math will unironically improve your cognitive abilities more than any shitty drug.
Oh and, it might actually fuck you up in the long-term when you start to depend on it.

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11395565 No.11395565 [Reply] [Original] [archived.moe]

I wasn't sure which board to post this one, but figured this one came the close, as forensics and forensic psychology would best fit under /sci/

Why is it that serial killers often hunt within their own ethnic group, that never made sense to me, why is it they're more often men, and finally why do so many target prostitutes, is it because they're less likely to be missed, are easy prey, or because it allows them in their mind to think of them as being less than human, so that they feel less guilt of their crimes?

1 replies omitted. Click Reply to view.
>> No.11395700

That's Theodore Bundy.

>> No.11395796

>own ethnic group
If their base motivation is a sexual thrill (eg Andrei Chikatilo), then within-group sexual preference would explain that generally.
Male sexual psychology geared more toward conquest/domination
All three good reasons, plus sex.
>sex sex sex

>> No.11395908

He was framed.

>> No.11395921

the reason why some serial killers target whores is because they are simply easy to dominate as the killings are generally about power as the killer lack it in their daily life it might also be something about impurity though thats more rare

>> No.11396072

It's mostly for reasons of stealth and ease of navigation that their victims tend to be in the same general demographic, and pursued on whatever grounds or kinds of places are most familiar to them. For instance in Dahmer's case, where most the victims were different racially, that was mostly because of the class similarity to them in the mixed neighborhood where he lived, and the bars he frequented. The principle isn't that different from any other kind of crime of passion or profit, in that it tends to be familial, and as such within similar races & classes.

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11395495 No.11395495 [Reply] [Original] [archived.moe]

99% of /sci/ cant do it (dont cheat)

1 replies omitted. Click Reply to view.
>> No.11395571

Wrong, your function is an increasing function while the one in the picture is a falling one!

The function is something like
[eqn] f(x) = c \frac{1 - 2x}{\sqrt{x - x^2}} [/eqn]
The problem is finding the correct parameter [math]c[/math] that gives the picture exactly.

>> No.11395623

The direction thing is whatever, the picture doesn't show which way is positive, or where zero and one are.
But anyway, if r is the radius of the circle, h is the distance between circle and R-line, then
f(x) in R =
where x in (0,1)

Or -tan or arcsin(pi/2-pi*x) if you want to switch around the R-axis or the (0,1) bar that are not labelled.

>> No.11395628

>Wait no. The direction thing is whatever, the picture doesn't show which way is positive, or where zero and one are.But anyway, if r is the radius of the circle, h is the distance between circle and R-line, then f(x) in R =tan(arcsin(2*x--1))*(1+h/r) where x in (0,1)Or -tan or arcsin(pi/2-pi*x) if you want to switch around the R-axis or the (0,1) bar that are not labelled.

>> No.11395633

tan(arcsin(2*x-1))*(1+h/r) where x in (0,1)
Or -tan or arcsin(1-2*x) if you want to switch around the R-axis or the (0,1) bar

>> No.11395825

Just use the inverse of a logistic function

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11395485 No.11395485 [Reply] [Original] [archived.moe]

>If you go to Grad school you won't have a social life
>mfw I already have no friends
Am I at an advantage /sci/?

>> No.11395676


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11395457 No.11395457 [Reply] [Original] [archived.moe]

this is the given solution to one of a group of exercises in an intro to logic book im reading, where the goal is to use elimination of synonyms, conversion/obversion/contraposition, and uniform translation to translate arguments to (not necessarily valid) standard form categorical syllogisms. this solution doesn't make sense to me.
ignore the content of the arguments. the solution is invalid, which doesnt matter.


All syllogisms having two negative premises are invalid.

Some valid syllogisms are sound.

Therefore, some unsound arguments are syllogisms having two negative premises.

No syllogisms having two negative premises are valid syllogisms.

Some valid syllogisms are not unsound arguments.

Therefore, some unsound arguments are syllogisms having two negative premises.

To get from the exercise to the solution, you have to obvert both premises, and only then apply the parameters "syllogisms" and "arguments". How is this a solution? how can you take the compliments of "invalid" and "sound", and only then apply those specific parameters? If you try to apply the parameters before obversion, it doesn't work, because the compliments of "sound arguments" and "invalid syllogisms" are different than those of the adjectival terms themselves. Isn't applying these parameters to these terms only after taking their compliments denying that the terms mean what you acted as though they did in order to get their compliments?

>> No.11395482

i just misused "parameter" through that whole thing. i meant a term that replaces an attribute with a class consisting of everything with that attribute

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11395411 No.11395411 [Reply] [Original] [archived.moe]


10 replies omitted. Click Reply to view.
>> No.11395501

Yes. I have a few.

>> No.11395566
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>> No.11395585

yes. I think it's rare tho. there's like 3 women I can think of where we both prefer to be friends. I listen to their problems/gossip and they get me high. I'm not normal tho. I spend way to much time with gay misogynists.

>> No.11395672

Honestly, no. If any one says other wise, they're complete simps.

>> No.11395674

Why would I want a woman as a friend? Women are retarded and only good for a quick fuck and chuck.

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11395360 No.11395360 [Reply] [Original] [archived.moe]

01110000 01101100 01100101 01100001 01110011 01100101 00100000 01101000 01100101 01101100 01110000 00100000 01110101 01110011 00100000 01100001 01101110 01100100 00100000 01110011 01110000 01110010 01100101 01100001 01100100 00100000 01110100 01101000 01101001 01110011 00100000 01101001 01101110 01100110 01101111 01110010 01101101 01100001 01110100 01101001 01101111 01101110 00100000 01110100 01101111 00100000 01100001 01110011 00100000 01101101 01100001 01101110 01111001 00100000 01101001 01101110 01100100 01101001 01110110 01101001 01100100 01110101 01100001 01101100 00100000 01100001 01110011 00100000 01111001 01101111 01110101 00100000 01100011 01100001 01101110 00100000 01110100 01101000 01100101 00100000 01001001 01101110 01110100 01100101 01110010 01101110 01100001 01110100 01101001 01101111 01101110 01100001 01101100 00100000 01010011 01110000 01100001 01100011 01100101 00100000 01010011 01110100 01100001 01110100 01101001 01101111 01101110 00100000 01101001 01110011 00100000 01010101 01001110 01000100 01000101 01010010 00100000 01000001 01010100 01010100 01000001 01000011 01001011 00100000 01100010 01111001 00100000 01100001 01101110 00100000 01110101 01101110 01101011 01101110 01101111 01110111 01101110 00100000 01100011 01101111 01101100 01101111 01101110 01111001 00100000 01101111 01100110 00100000 01101101 01101001 01100011 01110010 01101111 01101111 01110010 01100111 01100001 01101110 01101001 01110011

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>> No.11395366

01101100 01100101 00100000 01101000 01100001 01110011 00100000 01100001 01101100 01110010 01100101 01100001 01100100 01111001 00100000 01100010 01100101 01100101 01101110 00100000 01100100 01100101 01110011 01110100 01110010 01101111 01111001 01100101 01100100 00100000 01100001 01110011 00100000 01110111 01100101 01101100 01101100 00100000 01100001 01110011 00100000 01000011 01101111 01101100 01110101 01101101 01100010 01110101 01110011 00100000 01100001 01101110 01100100 00100000 01001011 01101001 01100010 01101111 00100000 01101100 01100001 01100010 01110011 00100000 01100111 01110010 01101111 01110101 01101110 01100100 00100000 01100011 01101111 01101110 01110100 01110010 01101111 01101100 00100000 01101001 01110011 01110011 01110101 01100101 01100100 00100000 01110010 01100001 01100100 01101001 01101111 00100000 01110011 01101001 01101100 01100101 01101110 01100011 01100101 00100000 01100110 01101111 01110010 00100000 01101110 01101111 01110111 00100000 01110111 01100101 00100000 01100011 01100001 01101110 01110100 00100000 01110100 01110010 01100001 01100011 01101011 00100000 01110100 01101000 01100101 00100000 01100011 01101100 01101111 01110101 01100100 00100000 01100001 01101110 01100100 00100000 01110111 01100101 01110010 01100101 00100000 01110011 01110100 01101001 01101100 01101100 00100000 01110100 01110010 01100001 01110000 01110000 01100101 01100100 00100000 01101000 01100101 01110010 01100101

>> No.11395381

Binary to letters:
'please help us and spread this information to as many individual as you can the International Space Station is UNDER ATTACK by an unknown colony of microorganisms it looks like a cloud of floating sand it deteriorates and destroy any materials that is comes in contact with PMA2 port and IDA2 adapter of the Destiny module has already been destroyed as well as Columbus and Kibo labs ground control issued radio silence for now we cant track the cloud and were still trapped here'

>> No.11395491

you've posted this on /x/ and i called you a nigger over there and now i will call you a turbo nigger here.

>> No.11395957

please stop making these fake threads man they decrease our reputation you already posted this on x come on dude

>> No.11395977

take that green shit off your posts, nobody gives a fuck who you are

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11395307 No.11395307 [Reply] [Original] [archived.moe]

How do you go about getting a recomendation letter for a graduate program?
I need two recomendation letters for the graduate program I am applying to but I don't really feel like anyone could write it other than my theisis advisor who I had a rocky relationship with and I am not sure he would write such a possitve letter about me.
Is it enough to just get a letter from some teacher for a random course?
Am I barred from entering a graduate program because I did not get to know the professors better?

>> No.11395310 [DELETED] 

>Is it enough to just get a letter from some teacher for a random course?

you should ask them out to dinner first

>> No.11395681

It's probably because you're retarded, Anon. You failed the basic thing of rec. letter farming.

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11395276 No.11395276 [Reply] [Original] [archived.moe]

Any biology or medical researcher here? Want to start a shitstorm or get massive bribes? Do a research on the toxicity of hand sanitizer on human skin. And when doing it, consider that while ordinary people don't use it much, hospital workers are encouraged to use it up to hundreds of times a day.

1 replies omitted. Click Reply to view.
>> No.11395425

Better ban hand sanitizers now so retards like OP don't die from swallowing them.

>> No.11395433

Triclosan is known to be toxic. Toxicological profiles are available for all of the constituents, and yes, a curosiry review shows that shit ain't good for ya.

Not sure what the big issue here is. Probably our split minded, dissociative western issues again.

>> No.11395492

Hospital hand sanitizer has a shitload more propylene glycol in it to prevent skin damage. The other ingredient is denatured ethanol.
Source: Worked at a hospital for two years and have been to others which had the same kind of sanitizer by a different manufacturer.

>> No.11396046

It does, yet my coworkers and I all wind up with bloody hands after a day of using it.

>> No.11396080

pretty much this
even bigger problem is he is constituent of many consumer cosmetic products

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11395262 No.11395262 [Reply] [Original] [archived.moe]

Is is dumb for a human to call another human a “Genius” based solely on human intelligence standards?
>Only another super intelligent being/alien with an outside perspective on intelligence can truly define who would be a “human genius.”

>> No.11395267

Combat is the measure of superiority.

>> No.11395285

History has always been characterized by human ambition and integrity. War has brought so many solutions and problems in two iterations where the face of the world has been changed inadvertently from it.

>> No.11395324

Wow where did you hear this from?

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11395259 No.11395259 [Reply] [Original] [archived.moe]

I'm wondering what the sci community thinks of Nano-Tech and what it will or might bring from fiction to reality.
One of my thoughts might be Androids, similar to DADOES by Philip K D (Blade Runner) becoming reality through Nano-Tech; is that too far fetched?

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11395218 No.11395218 [Reply] [Original] [archived.moe]

>be me
>high student in hl physics class
>doesnt know anything about aerodynamics because it was never taught nor were we forced to solve out air resistance for physics problems.
I'm aware of Bernouli's principle, but please break down some of the fundamental concepts of aerodynamics, please?

>> No.11395223

Apply to work at Boeing. They're always hiring and you can pick up everything on the job.

>> No.11395373

This isn't really basic stuff, but I think you'd find the Navier-Stokes equations cool. Also something that is basic is the drag force function if you're not familiar with that. https://en.wikipedia.org/wiki/Drag_(physics)

>> No.11395625
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start skydiving and experience it in real tiem

>> No.11395744

You must be 18 or older to post on 4chan

>> No.11395755
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except a place i worked at in colorado that wasn't a part of the USPA, 16 with parents permission

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11395217 No.11395217 [Reply] [Original] [archived.moe]

>Described as the Good Club by one insider it included David Rockefeller Jr, the patriarch of America's wealthiest dynasty, Warren Buffett and George Soros, the financiers, Michael Bloomberg, the mayor of New York, and the media moguls Ted Turner and Oprah Winfrey.
Coincidentally, just as Corona comes out, so does Bloomberg decide to run for POTUS

>They gathered at the home of Sir Paul Nurse, a British Nobel prize biochemist and president of the private Rockefeller University, in Manhattan on May 5. The informal afternoon session was so discreet that some of the billionaires' aides were told they were at "security briefings".


3 replies omitted. Click Reply to view.
>> No.11395238

>magnetoprotein expression genes. Yeah, look that up
not finding anything on this

>> No.11395243
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>> No.11395246


>> No.11395249
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>> No.11395252

Also, what tipped me off is two labs later reporting a failure to replicate. I look into who funded the original developments, and their replications, found it was Rockefeller Institute. Trying to cover their tracks, too ambitious, deliberately skewed details of their method? Who knows.

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