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Anonymous at Tue, 23 Apr 2024 17:30:14 UTC No. 16142348
If you run your body using soft full body action, the head has specific route of motion. If you run the same but with hard force, head motion is a different pattern. I predict there are many different full body actions you can produce using different types of force, each moving the head in a different way.
🧵 How does the discriminant based proof for C-S inequality downs on your mind ?
Anonymous at Tue, 23 Apr 2024 16:57:50 UTC No. 16142299
years ago our analysis teacher introduced this question on the problem set for first chapter of the course:
[math]\left| \sum_{i=1}^{n}x_iy_i \right|\le \sqrt{\sum_{i=1}^{n}x_i^2}\sqrt{\su
for the solution he adopted:
consider the expression
[math]p(t)=\sum_{i=1}^{n}(tx_i+y_i)
[math]p(t)=\left( \sum_{i=1}^{n}x_i^2 \right)t^2+\left( 2\sum_{i=1}^{n}x_iy_i \right)t+\left( \sum_{i=1}^{n}y_i^2 \right)[/math]
Which is just a quadratic polynomial for variable t. since [math]p(t)\ge 0[/math] for all t than the discriminant [math]\Delta[/math] must be a negative number (if it was positive than the polynomial will change sign twice).
[math]\Delta\le 0[/math]
[math]4\left( \sum_{i=1}^{n}x_iy_i \right)^2-4\left( \sum_{i=1}^{n}x_i^2 \right)\left( \sum_{i=1}^{n}y_i \right)\le 0[/math]
thus the C-S inequality. Now I remember when I and a collegue saw that problem, he said "This is an extraordinary formula that two great mathematicians put together their minds to prove",
but than I read in a french book that Cauchy proved this version all by himself, Schwatz proved another one with double integrals, and the generalized case was done by another mathematician.
But what boggles my mind is how any human would think of such a proof?
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Anonymous at Tue, 23 Apr 2024 16:44:21 UTC No. 16142281
Is it worth dropping out of my CS (year 2) degree and starting a math/physics degree at age 21 at a different (better) university from scratch? I hate my current experience.
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Anonymous at Tue, 23 Apr 2024 16:22:36 UTC No. 16142257
at what point does budget home lab equipment become non-viable?
i want a sonicator / sonic cell disruptor for some things but while aliexpress is full of them there are 0 positive reviews. i could step down and buy a high shear mixer which have far better reviews but its obviously not going to produce as fine an emulsion as a sonicator.
🗑️ 🧵 What are some good books to learn college level bio?
Anonymous at Tue, 23 Apr 2024 16:09:48 UTC No. 16142242
>pic related, a biological woman
🧵 Is IQ even real?
Anonymous at Tue, 23 Apr 2024 14:31:02 UTC No. 16142138
It seems sort of subjective...
🧵 Hey
Anonymous at Tue, 23 Apr 2024 14:14:14 UTC No. 16142122
Is there any way to use machine learning to build a bot that can get better returns than the s&p 500?
🧵 Mfw
Anonymous at Tue, 23 Apr 2024 13:44:05 UTC No. 16142073
All I want to do is study math and programming and not work but also not go to school. How can I accomplish this?
🧵 helio or geocentrism?
Anonymous at Tue, 23 Apr 2024 12:45:45 UTC No. 16142004
“So which is real, the Ptolemaic or
Copernican system? Although it is not uncommon for people
to say that Copernicus proved Ptolemy wrong, that is not
true….one can use either picture as a model of the universe,
for our observations of the heavens can be explained by
assuming either the earth or the sun to be at rest." - Stephen Hawking
1. all motion is relative
2. all dynamics is relative
3. all kinematics is relative
how do we prove (re: what are the experiments that have been/ can be done to prove) that the earth moves
1. at all
2. in relation to and around the sun
3. in relation to the universe, whether it spins
if you go against the 3 postulates then explain it to me please thank you
picrel is the CMB anisotropy seemingly related to the ecliptic as seen from earth
captcha GSJN
note: sun is the center because bigger and more gravity is not the right answer, because the solar system is not limited only to the earth and sun, there are innumerable factors involved
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Anonymous at Tue, 23 Apr 2024 12:08:26 UTC No. 16141978
What is the most skibidipilled and rizzmaxxed field of math?
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Anonymous at Tue, 23 Apr 2024 11:57:43 UTC No. 16141971
Brainlets begging for mercy everywhere
🧵 Mathematicians lies
Anonymous at Tue, 23 Apr 2024 11:13:28 UTC No. 16141942
ITT we expose lies of math
>Gabriel's horn has infinite surface area but finite volume
>Unit hypercube has volume = 1 in all dimensions but infinite surface area for higher dimensions
Clear violations of Stokes theorem, not that they give a shit.
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Anonymous at Tue, 23 Apr 2024 10:55:44 UTC No. 16141923
>science
HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAH
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Anonymous at Tue, 23 Apr 2024 10:34:50 UTC No. 16141905
I’m studying a simulation of schizophrenia. How do you most often detect simulants? Why it is often written that it is difficult for people to portray the negative symptoms of schizophrenia, if it is mostly close to depressive, requires a lack of activity. It’s easy, just lie in bed all day, isn’t it?
No one for The Structured Interview of Reported Symptoms [SIRS; Rogers et al., 1992] or M test?
It’s all in the scientific interest.
🧵 Hello
Anonymous at Tue, 23 Apr 2024 09:10:53 UTC No. 16141844
I'm 30 and just started learning multiplication because I failed elementary school. What are the chances that I can get to calculus in one year if I study everyday for one hour?
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Anonymous at Tue, 23 Apr 2024 08:42:00 UTC No. 16141820
You ever see these fucking science people?
just look at them?
they're fucking ugly and dysgenic.
ESPECIALLY ASTROPHYSICISTS
what happened?
🧵 Untitled Thread
Anonymous at Tue, 23 Apr 2024 07:59:50 UTC No. 16141795
Why do some say Eddington's results were a hoax?
🧵 How do I get my hands on a cadaver?
Anonymous at Tue, 23 Apr 2024 07:25:29 UTC No. 16141782
I want to study anatomy, there aren't any good enough models are there?
🧵 is it over for me?
Anonymous at Tue, 23 Apr 2024 07:05:56 UTC No. 16141765
I've had chronic depression for over 15 years now and have been taking meds for 10 years and sometimes I mess up single-digit multiplication
Just a few weeks ago I messed up this simple equation 0.5x = 4
Should I stop pursuing science and go for something else now?
Chronic depression can significantly impair cognitive function and daily functioning in several ways:
Difficulty Concentrating: Depression can make it challenging to concentrate on tasks, leading to distractibility and decreased productivity in daily activities.
Impaired Memory: Individuals with depression may experience difficulties with both short-term and long-term memory. This can manifest as forgetfulness, difficulty recalling information, and problems with learning new things.
Cognitive Slowing: Depression can slow down cognitive processes, making it harder to think quickly, process information efficiently, and make decisions. This cognitive slowing can impact performance at work, school, and in social situations.
Executive Dysfunction: Depression often affects executive functions such as planning, organization, problem-solving, and decision-making. This can result in difficulties managing responsibilities, setting goals, and completing tasks effectively.
Emotional Dysregulation: Depression can lead to heightened emotional reactivity and difficulty regulating emotions. This may result in mood swings, irritability, and difficulties coping with stressors, further impacting daily functioning.
>inb4 depression isn't real
Well then I hope you too get this not-real thing for the rest of your life
🗑️ 🧵 CO2 makes plants healthier
Anonymous at Tue, 23 Apr 2024 06:46:38 UTC No. 16141752
Good news everyone, rice, which is possibly the world's most important agricultural crop, not only grows better under CO2 enhanced atmospheric conditions, it also becomes more disease resistant when atmospheric CO2 is increased.
>Effects of elevated CO2 on resistant and susceptible rice cultivar and its primary host, brown planthopper
https://www.ncbi.nlm.nih.gov/pmc/ar
>The elevated CO2 (eCO2) has positive response on plant growth and negative response on insect pests. As a contemplation, the feeding pattern of the brown plant hopper, Nilaparvata lugens Stål on susceptible and resistant rice cultivars and their growth rates exposed to eCO2 conditions were analyzed. The eCO2 treatment showed significant differences in percentage of emergence and rice biomass that were consistent across the rice cultivars, when compared to the ambient conditions. Similarly, increase in carbon and decrese in nitrogen ratio of leaves and alterations in defensive peroxidase enzyme levels were observed, but was non‐linear among the cultivars tested. Lower survivorship and nutritional indices of N. lugens were observed in conditions of eCO2 levels over ambient conditions. Results were nonlinear in manner. We conclude that the plant carbon accumulation increased due to eCO2, causing physiological changes that decreased nitrogen content. Similarly, eCO2 increased insect feeding, and did alter other variables such as their biology or reproduction.