Stupid questions that don't deserve their own thread.
I have to write a brief paper, 1200-1500 words, on the field of genetic enhancement. If you could pick three main things I should focus on what would they be? It seems like a massive field and it seems easy to get lost in it all - I'm mainly looking for the big points, it doesn't have to be rigorous.
>>7959768
How much we've "evolved" / devolved, our awareness of the human evolutionary process, and how we manipulate the eugenics of other species for amusing but twisted reasons.
>>7959768
First SQT thread I haven't seen get full of replies in no time.
Let us keep it that way.
>>7961238
Just wait tell the school week kicks back up in action.
is the SQT really just the homework thread? if so, i support this. this thread has more math and science than anything else on the front page.
no matter what enhancement one tries to implement, it should not be at the detriment of genetic diversity which can be more important for population survival than any one characteristic of an individual (with the exception of reducing/eliminating lethal equivalents).
>>7961336
Homework/career advice thread. Basically hiding all disallowed topics from the mods.
>>7961350
jolly good. carry on.
check this out before you talk shit about psychology. Vigo, R. (2013). The GIST (Generalized Invariance Structure Theory) of Concepts, Cognition, 129(1), 138-162.
Human or crops/livestock?
Human:
1) Removal of genetic disease from the gene pool
2) Ethics; who pays, who gets treated, playing 'god'/interfering with nature, unforeseen side effects, should we just because we can, who says what is disease and what is beneficial to the individual or society e.g. ASD-genius potential correlation; creation of a two-tier society, insurance premiums, ginger males, dating apps, OK I'm wandering, but fuuuu swipe left if you ain't enhanced, lover boy.
3) Enhancement vs only removing diseases.
Crops/livestock:
1) no way am I
2) eating that crap because
3) I don't trust scientists
>>7961361
Wrong thread?
how do I get better at integration by parts
Where can I find the mechanics of action of FAD and FMN?
>>7959768
The other answers here are bad.
First, awareness of genetic defects as allowed for focused removal of these defects that is more effective than old-style breeding.
Second, in "knock out" systems and other tools have allowed us to understand the meaning and usefulness of certain genes.
Third, direct genetic manipulation (GMOs etc) is quickly becoming a possibility even in rather complex cases.
Let's say I managed to scrape by in life without having to learn advanced math. The best I've gotten is somewhat advanced electronics.
My defense is that I only ever had the same math teacher throughout high school and I just couldn't grasp his style.
The point is I never really moved past Algebra 2 and Geometry. I know a very little bit about calculus and trig. I love astronomy and I've been sick of pop sci for a while ( theres only so many times I can read analogies about relativity,) so I'd really like to get into the actual math behind this stuff.
Can anyone tell me what braches of math I need to start practicing to get into serious astrophysics?
Also any sources would be greatly appreciated.
>>7961421
>The other answers here are bad.
Ooh, get her. Faggot. Fuck off.
Stating the bleeding obvious, you don't say anything.
I guess this is more /adv/ than /sci/, but if I haven't heard from a few REU programs that said they were going to decide on the March 15th, should I assume I'm currently a backup option if someone else declines the position?
anyone have a cheat sheet or quick review guide to control theory/feedback control systems? Got a midterm tomorrow and im pretty fucked
Appreciate it a lot guys
>>7961628
You got rejected. They will actually just completely not get back to you if they don't want you.
>>7962199
Ah okay, I heard back from a program a few weeks ago saying to apply again next year since I'm a sophomore and they think I'll be a stronger applicant with more advanced classes under my belt. I figured they would at least email be back saying fuck off, I wasn't holding my breath to get it, but oh well. Thanks anon
>>7959768
Okay. Working on a Truss design for a project.
We are given an option of applying pressure to the center point at the top, or two points a set distance apart. (Distance is pre determined)
Which one is better? I'm leaning towards the single pressure point, as it seems less likely to have a bending failure. However, that does leave me with another question.
Should there be a vertical member right beneath the force, or should it be an x-sectional like pic related? I feel like pic related is more optimal, because I believe if there is a vertical member with six panels, then it is more likely to have a buckling failure.
Advice, /sci/? I guess the question is which is more likely to cause failure - force applied at a joint or force applied to a member?
I'm trying to solve this and getting trouble.
After doing the transformation I get that the new bounds are the unit circle. Then I converted to polar coordinates and came up with the answer shown in pic.
>>7962283
I think you forgot da = 'r' drd0, so it should be over 1/4 and it should be whatever 4 cubed is
>99% of /sci/ will get this wrong
>>7962288
= 6/2 * (5-4)/2
= 3 * 0.5
= 1.5
>>7962286
r is 1.
I noticed that I forgot to multiply by the absolute value of the Jacobian, but then I did it that way and still got the wrong answer. (I got 1600pi/3 that time)
How do i move sum points in Blocks diagrams for control theory? Trying to find the transfer function of pic related but cant reduce it past the first retroalimentation.
Also, someone told me that i can do the system in simulink and then theres a comand in matlab to find the transfer function of said system. Anyone know how?
>>7962288
13 you plebs.
>>7962319
You can do block diagram reduction, but for something like this I'd find Mason's Rule a lot easier.
https://en.wikipedia.org/wiki/Mason%27s_gain_formula
Also in MATLAB you can use the sisotool.
>>7962357
Yeah i meant block diagram reduction. Will look into sisotool. Thanks Anon
>>7961444
Have you heard of Newton and his invention? Look into that, mate
>>7962376
I'm telling you this is an easy one-off for mason's rule, because there are few non-touching loops. It's literally going to be the two forward paths over the determinant. The determinant is just going to be 1+(sum of each individual loops gains)-(sum of pairs of the 3 nontouching loop gains). Pic related is something my professor made.
>>7962390
Thanks!
Reposting from a ded SQT, and rephrasing this question a bit.
Consider Weierstrass' original function:
[eqn]f(x) = \sum_{n=0} ^\infty a^n \cos{ (b^n \pi x) }[/eqn]
where
[math]0 < a < 1[/math], [math]b[/math] is a positive odd integer, and [math]ab > 1 + \frac{3}{2} \pi[/math].
Weierstrass proved that the function is nowhere differentiable.
However, if we still try to calculate its derivative anyway, from the sum rule in differentiation:
[eqn]f'(x) = \sum_{n=0} ^\infty -a^n b^n \pi \sin{ (b^n \pi x) }[/eqn]
Since [math]\sin{k \pi} = 0[/math] for any integer [math]k[/math], it would mean that the function is differentiable at the points where [math]x[/math] is an integer, since at those points,
[eqn]f'(x) = \sum_{n=0} ^\infty -a^n b^n \pi \sin{k \pi} = \sum_{n=0} ^\infty 0 = 0[/eqn]
where [math]k = b^n x[/math] is an integer, thus contradicting Weierstrass' proof.
Furthermore, this can be extended to show that the general cosine Weierstrass function is differentiable at [math]x = 0[/math], because at [math]x = 0[/math], the derivative is equal to 0, since [math]\sin{0} = 0[/math].
Can anyone explain this contradiction? It's been bothering me for more than a while now.
>>7963117
>step 1) fag says function cannot be differentiable
>step 2) challenge accepted
>step 3) inject a random K in the derivative because guy never said you couldnt
>step 4) function is now differentiable and guy got BTFO
>>7963128
the K comes from n->inf btw. Also your an idiot
>>7963128
Weierstrass said differentiable nowhere. If I find even one value of x where the function is differentiable, there's a contradiction.
>>7963117
If you replace [math]\infty[math] with N, then your calculations work. The problem is that taking the derivative and then taking the limit as N-> infinity is not the same as taking N->infinity and then taking the derivative.
>>7963171
So the sum rule in differentiation doesn't apply if I'm summing infinitely many terms? Is there a reason for that?
>>7962288
[eqn]
\begin{aligned}
\frac{ 6 \times 5 - 4 }{2} &= \frac{6 \times 5 + (-4) }{2} \\
&= \frac{1}{2} \left[ 6 \times 5 + (-4) \right] \\
&= \frac{1}{2} \left[ 30 + (-4) \right] \\
&= \frac{1}{2} \left[ 26 \right] \\
&= 1 \left[ 13 \right] \\
&= 13
\end{aligned}[/eqn] What was supposed to be hard?
>>7963203
Then can uniform convergence be applied here? Because in this case, both [math]f_n(x)[/math] and [math]f_n(x)[/math] approach 0 as n approaches [math]\infty[/math].
>>7963229
>both [math]f_n(x)[/math] and [math]f_n(x)[/math]
Fug
Meant
both [math]f_n(x)[/math] and [math]f_{n}^{'}(x)[/math]
Now that Im back from spring break and got drunk and high 4 nights in a row after 6 months of sobriety, is there a website that will explain balancing redox equations in depth and text?
>>7963243
ya
google.com
Is this correct? (Will post the question after this post). Don't give me the answer if it's wrong. It doesn't have to be to scale.
Thanks.
>>7963298
Question.
>>7963301
You forgot [math]\angle C = 97^{\circ}[/math]
Captcha: 97 1300
>>7963314
I didn't forgot it, I just haven't added it into the pic yet. I am mentally aware of it. So does it look okay to you?
>>7963314
BTW, this is the next question (b). I'm getting 194 (to nearest m) using the sine rule. But I feel like it's wrong.
>>7963319
It appears correct but warning, I have no idea how a rugby pitch even looks like. Judging that he's at point C and "the sideline on his right-hand side has a length of 110m". I have a feeling that [math]CA = 110m[/math] and not [math]AB[/math]
>>7963333
This should give you a general idea. Side line refers to one of the two longer sides.
>>7963339
In that case, AB is 110m and I was just being an idiot. You have part A correct.
>>7963346
Another question related to the first. I'll provide my answer in a sec
>>7963376
So cd and ab will form a 180 angle. Which means CDB and CDA are 90 degrees. Then I need to find angle BCD in triangle BCD by 180 - 90 - 32. And then I can use the sine rule to find the length of CD. CD/sin32 = 110/sin58.
How is this looking?
I'm a dilligent student who were doing as level bio and chemistry but for some reason i have to fuck it all and go to some state uni to continue my study
I get straight a's and did calculus and whatnot but basically i give fuck all about science and they don't interest me. But since they pays well What major should I choose so i can have fun and have a job when i graduate?
>>7963383
ignore the 97.
>>7962288
(6*5 - 4) / 2
(30 - 4) / 2
26 / 2
= 13
if you don't get this right then you shouldn't be on /sci/
>>7963383
Your approach is correct so far except that there may be a problem with the angles you wrote down. Triangle CDA sums up to be 190 (judging by your handwriting). When you split angle C... Every angle in triangle CDA sums to be 48 + 52 + 90 = 190.
Does anyone here have any tips that help learn easier? I'm wanting to go into chemistry and am retarded when it comes to math but I found in my chem classes I caught on very quickly with all the equations but in the actually math classes I'm lost.
Basically, does anyone use any alternative methods to help them learn?
>>7963393
Apologies for the hand writing. This is what I get.
>>7963171
>>7963203
Alright, so I'm using a different approach.
To prove uniform convergence, I can use the Weierstrass M-test.
First, set [math]x \in \mathbb{Z}[/math].
Let [math]f_n(x) = a^n \cos{ (b^n \pi x) }[/math].
[math]0 < a < 1[/math] means that [math]\sum a^n[/math] converges, and [math]|a^n \cos{ (b^n \pi x) }| \leq a^n[/math].
So [math]f_n(x)[/math] is uniformly convergent for any [math]x \in \mathbb{Z}[/math].
Now [math]f_{n}^{'}(x) = -a^n b^n \pi \sin{ (b^n \pi x) }[/math].
For any [math]x \in \mathbb{Z}[/math], [math]f_{n}^{'}(x) = 0[/math] since [math]b[/math] is an odd integer [math]\Rightarrow b^{n} x[/math] is an integer [math]\Rightarrow \sin{ (b^n \pi x) } = 0[/math].
So [math]f_{n}^{'}(x)[/math] is also uniformly convergent for any [math]x \in \mathbb{Z}[/math].
So by uniform convergence, for any [math]x \in \mathbb{Z}[/math],
[eqn]f'(x) = \sum_{n=1}^\infty f_{n}^{'}(x)[/eqn]
Now apply to >>7963117, and I'm back to square one.
>>7963418
So am I splitting the angle C incorrectly?
>>7963423
[math]f_n' [/math] does not converge uniformly.
>>7963418
All of that information is correct. Now to solve part B of the quesiton, use the sine rule to find the length of CD. And you're done.
>>7963423
[math] x \in \mathbb{R} [/math] and not just [math] \mathbb{Z} [/math].
What the hell is [math]f'(x) [/math] even supposed to be if [math] f[/math] is only defined on the integers?
>>7963443
The only problem is that C is 97 degrees before being split (at the beginning I'm given two angles of the larger triangle, 32 and 51). Once split it and create line segment CD, I get 96 degrees once adding up the split angles. So it seems I've gone wrong somewhere. Angle CAD should be 51 degrees not 52.
I'll rewrite it all when I get home.
If I'm getting ready to complete my undergrad with a dual degree in math & physics (emphasis in astronomy), what should I do if I don't want to go into education? I've considered a masters in physics and then applying to the engineering PhD program, however I'm not certain that's the best option. Suggestions are appreciated.
>>7963543
>what should I do if I don't want to go into education?
Apply for jobs that aren't in education. It's not so hard.
if you have normalized 2d vectors (points on a unit circle), what's a good way to map them to a "dial". like if you have 12 numbers evenly distributed along the edge of circle, then (1,0) would map to 3 and (0,-1) would map to 6 and so on.
the obvious solution would be to use atan2(y,x) to get the angle and then multiply it by a constant factor, but then you run into problems when x or y are close to zero, so i'm looking for an alternative solution. any ideas?
this is for computer graphics shader code btw
>>7963553
This is what I've been doing for quite some time with no luck.
>>7963554
>but then you run into problems when x or y are close to zero
Scale the vector by some huge number so that neither component is nearly 0.
Hi. I'm a freshman in CC, so please understand that I'm dumb.
On a test, this question stumped me. I wasn't sure how to do it. I have been trying to find out how to do it but I don't know what to search. I tried "quadratic formula polynomial in denominator" but I didn't get what i thought was relevant. If anyone can point me in the right direction to getting help for solving this, I'd be grateful.
>>7959768
Talk about how the neanderthal genes upgraded the non african races, and how this is being hidden at all costs to push the multicultural, multiracial agenda that will destroy all countries, cultures and races (except israel, judaism and jews) forward.
Do you guys struggle with Accounting type classes? I am doing well in Calc but struggling hard in accounting for some reason.
>>7959768
OKAY SO truss guy here. Royally fucked up my thought process.
tl;dr is that i need to design a truss that can support a load of 1000 lbs of pressure applied at the top middle. (or 4 inches from the middle on each side but the middle is probably simpler)
So, I was looking at a bridge truss design, when in reality I should have been thinking of more like a roof truss design.
So does anybody have any good suggestions for a roof design? I'm kind of limited to a design without a pointed top, so probably something with more of an arch. (Which, since I'm applying the force to the middle anyways with a machine, probably for the best)
Been grinding my head on this a while, but feels extremely limiting trying to get my load down given the constraints of my measurements. (22" by 7")
>>7963995
nothing special going on here, it just needs to be rearranged a little bit so it looks like a quadratic equation.
test post
[math] \frac{1}{2}\plusminus x^{2y}\sum_{n=5}^{99}x e^(n)[\math]
>>7963995
Subtract 1 from both sides, then use the quadratic equation y=(-b +- sqrt(b^2-4ac)/(2a) where y=1/(x-7).
OR
subtract 1 from both sides, multiply both sized by (x-7)^2 and then use the quadratic equation, this time letting y=x-7.
>>7964345
>[math] \frac{1}{2}\plusminus x^{2y}\sum_{n=5}^{99}x e^(n)[\math]
[eqn]\frac{1}{2} \pm x^{2y} \sum_{n=5}^{99} x e^(n)[/eqn] You're welcome.
Source: \frac{1}{2} \pm x^{2y} \sum_{n=5}^{99} x e^(n), if you do not space out closing brackets, /sci/'s LaTeX renderer will not render it.
how much of chemistry knowledge I need to have to make amphetamine?
I want for my personal use only
I found online recipes but they're litlle hard to understand
how much of chemical knowledge I need so I know what I'm doing?
where to start?
any online guide step by step?
>>7964421
im only asking for your own safety - what kind of instructions do you have? Is it a paper or is it a list of physical instructions? If it is the latter please don't proceed. If it is the former then simply work through each and every aspect of the paper using the broad online resources available that many have worked hard to produce until you understand the paper.
if you refuse the sensible decisions above direct yourself to the closed group "Psychedelic Chemistry" on facebook, AND USE THE FUCKING SEARCH FUNCTION.
>>7964421
MOOOOOOOOOOODS!!
>>7964434
it's a list I found on drug forum
i.e. boil this and distile that
I'm currently going through basic chemistry books until I know what's going on but I need direction.
>>7964400
I'll try again.
[math] \frac{1}{2}\pm x^{2y}\sum_{n=5}^{99}x e^n [\math]
>>7964454
Obviously I am missing something crucial.
>>7964443
well first understand the ingredients
research what they purport you work with and understand the chemical of interest, and other major components of the primary materials ( for each step )
when you understand that look at what you add to what ( make a flowchart ); look at what could be happening ( is it an acid, etc ) and guess at what could be happening using reference reactions.
Otherwise you gotta work your way up from SN1/2 reactions in an organic chemistry book from the library or the internet ( roughly 50 hrs or 2 courses worth of study, which isn't that much desu).
https://en.wikipedia.org/wiki/Amphetamine
And again.
[math] \frac{1}{2} \pm x^{2y} \sum_{n=5}^{99}x e^n [\math]
>>7964459
The [math] tags need to be closed with a forwardslash and not a backslash. It is [/math], not [\math]. Try it again. Here's my attempt;[eqn] \frac{1}{2} \pm x^{2y} \sum_{n=5}^{99} x e^n [/eqn]
>>7963557
try something in finance
>>7964466
Fug sorry..you close the math tags with [/math] and not [\math].
Last try:
[math] \frac{1}{2}\pm x^{2y}\sum_{n=5}^{99}x e^n [/math]
>>7964120
Probably because it's soul destroying and tedious
>>7959768
an object is dropped from the top of the empire state building which is 1000 feet high. derive the formula for the distance the object falls in time t, then calculate the time it takes the object to reach the ground and the velocity with which it hits the ground The answers are s=16t^2 ; 5sqrt 10/2 second ;80 sqrt 10ft/sec
Can anyone show me how to find these answers
Working on this (approximation th.) and have one step left to finish this godforsaken problem.
You have any ideas?
Is normal distribution a meme, what are its pitfalls? It seems to me very oversimplified concept.
How do I know what to integrate when doing basic calculus?
In the past I only ever solved abstract integrals and it was obvious I integrated "x", but now I am looking into some basic physics I find it a lot more difficult.
For example, how does Fenyman make this leap in his working?
>>7965178
nvm, figured it out
>>7965169
>oversimplified
mate what
>>7965198
He doesn't know the central limit theorem.
>>7965206
I know CLT...
>>7965220
Then I suppose the tricky bit is describing the situations where similar results follow from loosened assumptions.
>>7965234
I'm a stat noob. After learning some concepts in inference like the ones stated above including hypothesis testing, I feel like it's pretty much playing around with z-table or I'm just a retard. How do I understand it more intuitively?
>>7963323
It is.
>>7959768
Anal lubrication, penis size, and seminal fluid production rate.
>>7965092
can anyone help me i keep getting
S=16t^2+1000
how do i solve for the velocity and time
>>7965304
Yeah. I realized why, had my calc in radians instead of degrees. 194 made no sense as the other length was only 110.
Apologies: I do not know how to add latex on sci.
So I want to project a circle-angle onto an ellipse. Anybody know what I am doing wrong?
>tfw 49% on calc III test
kill me lads I'm so fucking stressed
>>7965351
Nvm, I got it.
X is simply tan^-1(tan(140 * a/b) + 180°. Where a is the semi major axis and b is the semi minor axis. Adding 180 is necessary to make sure the resulting angle is in the second quadrant.
I am really confused by quark decay.
Can every quark can decay into every other quark via weak force?
When I draw feynman diagrams how do I know when to use a photon and when to use a W or Z boson? (when there are no neutrinos involved)
>>7965092
You sure about those answers, lad?
>>7965613
Oh, rereading your question its because you live in some kind of third world primitive imperial-using country. If you use A = whatever your godforsaken value for g is you should get the right answer.
The rest is trivial,
>>7963383
Remember to find the length of BD before you find the length of CD as the RHS of the triangle is no longer 110.
Could someone pleaseee, for the love of God, just spell out for my OCD brain that a/a' is only equal to b/b' if c/c' is equal to both a and b. In other words, a/a'=b/b'=c/c' falls apart if even one of them isn't the same as the other two. Just spell it out for me please so it stops bothering me. OCD is a bitch.
>>7961395
Do it a lot. Just like all math. If you can't understand why you're doing it just memorize how to do it and when it's used.
>>7963383
9to
320
$20
Please learn how to accurately write out digits.
Hi /sci I have this statistic problem can you help me?
" a group of scientist create a gum that makes people stop smoking, if 60% of the people that use it left smoke, what is the probability that in a group of 3 people at least one of them left smoke?" I need the explanation or demostration
Can the two membranes around the nucleus be reffered to as plasma membranes?
What should I perfect before moving into integration and derivatives.
What does the notation [math]F(a-)[/math], or [math]F(a^{-})[/math] mean? I'm sure I've seen it before, but I've completely blanked on it.
