Archived threads in /sci/ - Science & Math - 1242. page

>>8464241
#include <iostream>
using namespace std;
bool isTriangular(int);
int main()
{
int x;

cout<<"Please enter positive integer :\n";
cin>>x;
return 0;
}
bool isTriangular(int x){
this is what I have so far

The formula for triangular numbers is n(n+1)/2
Just do the reverse to see if you end up with a positive integer.
The reverse is at the bottom of this page: https://en.wikipedia.org/wiki/Triangular_number

We all feel lazy sometimes but you should really make a bit more of an effort with this extremely baby assignment. Programming is one of the most important life skills you can learn.

why are the math and CS students taking the exact same math class ? Aren't math students supposed to have advanced math classes ?

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Did you really start CS thinking it would be maths-intensive? That's stupidity on your part. Your classmates were shit at it because they assumed they could get by with high-school level math, which isn't that far from the truth.

>>8464238
In my university (and in many other unis in Germany), the first two math classes analysis and linear algebra are attended by students of math, physics, CS, MFE (mathematical financial economics),... Only later are there separate classes

>>8464246
I didn't expect it to be maths-intensive (though I did expect a little bit more math than I got), but I expected the non-math classes to be harder. They were a fucking joke compared to the math classes. I knew they would be easier, but not THAT much easier

>>8464097
question why the moon is a tiny earth clone on both of those realities

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>>8464097
What happens if the wormhole closes right when you're passing throught it?

>>8465344
A new big bang and a new universe.

bamp

if you do this you are quite retarded.
at least finish your phd before getting assraped by theoretical physics and killing yourself

>>8464102
>getting assraped by theoretical physics and killing yourself

Is it really that bad?

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FINDING 1: ALL PSYCHOLOGICAL TRAITS SHOW SIGNIFICANT AND SUBSTANTIAL GENETIC INFLUENCE

Psychological domains traditionally focused on individual differences are those that have been studied most frequently with genetically sensitive designs, primarilythe twin method in which resemblance is compared in pairs of identical and fraternal twins: cognitive abilities
and disabilities, psychopathology, personality, substance use and abuse, and health psychology. Traits in these domains have consistently shown significant genetic influence in adequately powered studies

Although ubiquitous genetic influence is now widely accepted, this finding should not be taken for granted because it was a battleground in psychology as recently as a few decades ago and remains controversial in some areas such as education.

As an example, a review of the world’s literature on intelligence that included 10,000 pairs of twins showed identical twins to be significantly more similar than fraternal twins (twin correlations of about .85 and .60, respectively), with corroborating results from family and adoption studies, implying significant genetic influence. We are not aware of a single adequately powered study reporting nonsignificant heritability.

Traits such as political beliefs, religiosity,
altruism, and food preferences also have shown significant genetic influence. A recent metaanalysis of data drawn from 3,000 publications on nearly 18,000 traits of 15 million twin pairs showed that this finding is not limited to psychological traits

Significant and substantial genetic influence on individual differences in psychological traits is so widespread that we are unable to name an exception. The challenge now is to find any reliably measured behavioral trait for which genetic influence is not significantly different from zero in more than one adequately powered study.

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FINDING 2: NO TRAITS ARE 100% HERITABLE

As noted earlier, heritability estimates are substantial, typically between 30% and 50%, but this range of estimates is a long way from 100%. Again, we are unable to find any excep-
tion in which the heritability of a behavioral trait is near 100%. However, this is not a limitation of the methods, because some traits, such as individual differences in
height, yield heritability as high as 90%. It should be noted that behavioral traits are less reliably measured than physical traits such as height, and error of measurement contributes to nonheritable variance.

Although this finding might seem obvious and unsurprising, it is crucial because it provides the strongest available evidence for the importance of environmental influence after controlling for genetic influence. Because
genetic influence is significant and substantial, one must control for genetic influence when investigating environmental influence.

Environmental research using genetically sensitive designs has led to three of the most important discoveries about the way the environment affects behavioral development

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FINDING 3: HERITABILITY IS CAUSED BY MANY GENES OF SMALL EFFECT

Powerful but overlooked evidence that many genes affect complex traits including behavior comes from selection studies in nonhuman animal research. If only a few genes were responsible for the heritability of a trait,
selected lines would separate after a few generations and would not diverge any further in later generations. In contrast, selection studies of complex traits show a linear
response to selection even after dozens of generations of selection, as seen, for example in one of the largest and longest selection studies of behavior that included replicate selected and control lines

Although GWA studies have limited power to detect such minuscule effects even with samples in the tens or hundreds of thou-
sands, these studies have tremendous power to detect larger effects. For example, a GWA study of 20,000 individuals has 99.9% power to detect an association with an effect size that accounts for 1% of the variance (i.e., a correlation of .10). This suggests that no such associations exist with effect sizes larger than 1% in the population. Some
extremely rare mutations have large effects on individuals, but because they are rare, their effect on the population is small. If the largest effects are so small, the smallest effects are likely to be infinitesimal, which implies that
heritability is caused by many genes of small effects.

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>>8463816
>So let's say you play a video which is 100 seconds in length
>Does the whole video have a finite length?
how is that a question?

>>8463830
well that's an interesting point you raise

>>8463830
>>8463844
oh actually that's not really a problem, I was just retarded for a second.
You have 100 seconds of video footage you use. The length of the assembled video at the end is unknown.

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>USA did this in 2012
>Europe can't land a pizza platter with a parachute on Mars in 2016

ESA has roughly 1/4 of NASA's budget and lack even remotely the same experience with space flight in general. That's pretty much why they're nowhere near as good as NASA is.

>be nasa
>see spacex cutting costs by 10x with vertical integration
>be required by congress to use thousands of shit contractors

Ribs need impact. Everything else can be broken on the principle that ligaments (which hold bones together) are in the main, stronger than bones. Think of the range of movement they least want to go into. So you can hyperextend an elbow, or twist a wrist. Knees will tend to give out in the ligaments first, and ankles are tougher, they can tear ligaments or avulse (pull off a bit) bone or break bones, if stamped on, eg football players.

>>8463620
I need more specifics. In case of breaking a leg for example, would the way to do be to step on it below the knee and then jerk it up and to the knee holding it above the foot?

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>>8463003
So you're asking if people really do read/have to read fuckhuge bricks for university? YES WE FUCKING DO.

What the fuck did you think? Jesus christ...

t. medfag

most of it is bulk of the writer reflecting his ego, to project his person personality, and be friends with the reader

if you don't care about him / her and just read the book it only takes a day or two and you get all the necessary info

>>8463007
No. When recommending Guyton, wiki said after reading this you will know more physiology than a med student cause medstudents go for important things only.

So i was asking if there really are non-med autists who read these books for fun..

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Why is a [math]\mathbb{R}P^2[/math] a real projective space if we can't embed it in [math]R^3[/math]? I'd call it fake instead.

Ps. nice duck.

>>8462532

It's analysis of the real numbers. Yes, there is also an "imaginary analysis". No fake one afaik, tho.

>>8462544
>fake
that's nonstandard

lisdexamfetamine fucks your shit up and i feel bad for anyone who's parents have had them on it since they were kids or teens

people have given up on solving problems

>>8462242

id say stims are pretty safe. i dont think the side effects are good in short term and can be bad (depending who you are). but yeah long term not much probably unless you get addicted and maybe bad teeth/breath. feel like if u take enough for a long time it can increase your risk of anxiety/panic. maybe it will increase your blood pressure too? i dont know.

>>8462242
I love it. I'm writing my doctorate thesis on vyvanse. wouldn't take it if I didn't have to do intensive work though. I value my sleep. Otherwise great for doing mass reading and writing

Really gets those axons electrified

Really causes those synaptic vesicles to bind to their receptor sites.

>>8460985

sure triggered a statistically significant increase in action potentials

>>8460080
Shitton of manual computation.

see that flag moving in the wind?
that vacuum moon wind?

well guess what

>>8460138
Are you talking about how the flag is upright instead of just fallen over? Well that's because there was a horizontal pole going through the top of the flag to make it stay like that

take a picture and give it to whoever asked u

>>8454762
A book doesn't really help.

Set up the equation of an arbitrary line which belongs to the plane, take the dot product with the original line, show it equals zero.

Alternatively, find the equations of 2 perpendicular lines which belong to the plane, take their cross product, show it is co-linear to your original line

She sounds like terrible lecturer.
Not all women in physics are like that; don't mark us all like that because of one lazy lecturer.

>>8464966

Can I give you the D?

>>8464988
Fuck it, I just recently got dumped, might as well