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Archived threads in /sci/ - Science & Math - 197. page


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How are numbers like this one pronounced in English (exchanging the comma for a dot, obviously)?

In my language we say what would translate to "Zero Dot/Comma Period Nine".
39 posts and 1 images submitted.
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>>8020191
Zero point 9 repeating.
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>>8020192
So it's "9 repeating"?
And what do you do when the repeating pattern starts at some point after the dot?
Like that you don't have a marker for that in the pronunciation.
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>>8020191
Zero point nine recurring.

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How important is knowing how to do basic writing and literary composition in academia?
23 posts and 3 images submitted.
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>>8020030
>basic
lmao

You'll need to do better than that.
Framing things in terms of the existing literature and current fad concepts are important.
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It is incredibly important to be able to say exactly what you mean and do so in manner that cannot be misconstrued. Try to be clear and concise, depending on what you're working with clarity can prevent harm.
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>>8020043

Wrong

It's more important to be able to obfuscate bullshit so you can amass funding while no one calls you out

See Mochizuki for example

What are good resources for quickly getting into computer vision? Is using OpenCV a good idea?
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>>8019998
OP here. Why you do this? It was already on the front page.
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Fuck this logo
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>>8019996
the blue one doesn't match the others

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Hey /sci/ !
I'm a code artisan ask me anything!
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>>8019790
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>>8019792
I really really like PHP
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>>8019790
Backbait: how do you design superb assembly code? And I am talking Woz-grade code here.

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Will we have a lunar base in our lifetime? What is holding us back from doing this?
35 posts and 4 images submitted.
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>>8019756
>Will we have a lunar base in our lifetime? What is holding us back from doing this?

Public and political will to budget for it.
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>>8019756
>Will we have a lunar base in our lifetime?
Maybe.

>What is holding us back from doing this?
Politics.

A lunar base is definitely possible using current technology and infrastructure. However, it would require a significant amount of money to be committed over a long duration, with little-to-no short-term gains. That's something that most politicians would need a lot of convincing to agree to.
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>>8019756
Think of how expensive maintaining the ISS is. A lunar base is the same thing but 1000 times worse

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how many years would it take a human to mathematically solve every equation needed to run 10 seconds of a game like cs go?
no stopping or breaks
your rough estimates

pic unrelated
11 posts and 2 images submitted.
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bout tree fiddy
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>>8019659
30 frames per second * 10 * 900 pixels * 1600 pixels

I would say most of a day depending on how motivated you are. You mainly just have to solve some really big matrices, plus a little extra math on the side.
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>>8019680
more like 60*10*1080*1920

on the other hand you also have to interesect lines with cuboids and cuboids with cuboids, and calculate the next position of every movable object.

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Are we past the Great Filter?
39 posts and 7 images submitted.
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Insufficient data for meaningful answer.
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>>8019566
Not quite.

I believe the final stage of the great filter is human morality.

We're letting our species and planet die by allowing 3rd world and hostile countries along with our own uneducated/unintelligent to breed like rabbits and consume this planets finite resources at an ever increasing rate in the name of morality and equality.

This planet has finite resources we can all agree on, yet you dare mention that only the brightest and best of humanity should be allowed to have children and people are horrified. What, allow anyone to have as many children as they'd like until we hit 100 billion? Is that it?

We're not putting a stop to it because of 'morality'. This planet will die unless the most advanced societies eradicate those dragging us down with them.
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>>8019572

http://www.nature.com/nature/journal/vaop/ncurrent/full/nature17946.html

Current genome-editing technologies introduce double-stranded (ds) DNA breaks at a target locus as the first step to gene correction1, 2. Although most genetic diseases arise from point mutations, current approaches to point mutation correction are inefficient and typically induce an abundance of random insertions and deletions (indels) at the target locus resulting from the cellular response to dsDNA breaks1, 2. Here we report the development of ‘base editing’, a new approach to genome editing that enables the direct, irreversible conversion of one target DNA base into another in a programmable manner, without requiring dsDNA backbone cleavage or a donor template. We engineered fusions of CRISPR/Cas9 and a cytidine deaminase enzyme that retain the ability to be programmed with a guide RNA, do not induce dsDNA breaks, and mediate the direct conversion of cytidine to uridine, thereby effecting a C→T (or G→A) substitution. The resulting ‘base editors’ convert cytidines within a window of approximately five nucleotides, and can efficiently correct a variety of point mutations relevant to human disease. In four transformed human and murine cell lines, second- and third-generation base editors that fuse uracil glycosylase inhibitor, and that use a Cas9 nickase targeting the non-edited strand, manipulate the cellular DNA repair response to favour desired base-editing outcomes, resulting in permanent correction of ~15–75% of total cellular DNA with minimal (typically ≤1%) indel formation. Base editing expands the scope and efficiency of genome editing of point mutations.
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Because of “the cell’s desperate attempts” to mend its genome, said Harvard University biologist George Church, “what often passes as ‘genome editing’ would more appropriately be called ‘genome vandalism,’” as the cell inserts and deletes random bits of DNA where CRISPR cuts it.

Because the new version of CRISPR avoids that mess, it “offers a huge step forward,” said Church, who was not involved in the discovery, and whose 2013 paper helped launch the CRISPR frenzy. “It is arguably the most clever CRISPR gadget to date.”

Harvard University biochemist David Liu and post-doctoral fellow Alexis Komor, who led the work, have filed a provisional patent application on their invention, which changes one-letter misspellings in DNA called point mutations. Liu is a consultant to and cofounder of Editas Medicine, a genome-editing company in Cambridge, Mass., that went public in February. Church is also a cofounder of Editas.

“Most known human genetic variations associated with disease are point mutations,” said Liu. “Current gene-editing methods aren’t particularly good at correcting those.”

The problem addressed by the new technique is not the usual one discussed with CRISPR, namely, off-target effects. That refers to changing a region of the genome other than the intended one. While early genome-editing experiments had that problem, there has been “tremendous progress” in fixing it, said Dr. Keith Joung of Massachusetts General Hospital.
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CRISPR is kinda like the future that 5 years ago nobody thought they would see for another 50 years. And it's already being made better.

It's too bad we know so little about what to change in our DNA to make ourselves more healthy. And even if we did, crazy people would be lining up to make it illegal.
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>>8019514
The thing is actually being able to edit is going to make our understanding grow much faster.

There is a reason China has cloning factories.

OK, I'd like some advice about what to read and learn in my extra time. I left college as a freshman a few years ago due to chronic illness. I plan on reapplying during the next application cycle, meaning I would go back to college in Fall 2017. This is about 16 months from now. If I studied for 3 hours per day for 5 days a week, we're talking 960 hours.

I'm looking to major in neuroscience (focused on computational neurosci), which is what my major was before. Also, I'm interested in fiction literature and electronic music production. Since these fields are pretty eclectic, I'm wondering what I should study to become well-rounded in them all. And to what extent (e.g. mathematics, but only up to differential and integral calculus?).
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>>8019475
I have a Masters in mathematical physics and I'm extremely well-read in literature, philosophy and religion. I was going to say I'm a virtuoso guitarist, but I can just play fast and don't enjoy music enough to dedicate myself to it, so I'll leave that out.

However, I got proficient in all of my interests by spending vast amounts of time on them (i.e. 14 hours weekdays/10 hours weekends during a year off about 5 years ago, I still do the same every break I get).

You might want to increase the amount of time you are going to spend studying if you want to gain a notable level of proficiency; a lot of people here pick up stupid hobbies while they go through an interim period in order to pass the time. The most comical is picking up 'reading', then filling your shelf with Wallace and Pynchon along with an unread Odyssey and Illiad. Don't be that guy.

I'd be glad to help out but you should post more details of what exactly you want to achieve and why you want to do it.
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>>8020226
OK, thanks.

I think my end goals would be something like this:
1: PhD in neuroscience or a related field, because I've been interested in it since I was a child and would like a career in an academic or research setting.
2: Better both my literary and academic writing skills; I've gotten a few short stories and online humor articles published online, and I'd like to expand my abilities in prose stylistics. I might want to minor in English or creative writing when I go back to school.
3: My best friend growing up creates electronic music, EDM and dubstep and that sort of stuff, and I'd like to understand enough of it where I can collaborate with him.
4: Some other things I'd like to learn. I have family around the world that speaks Norwegian, German, Farsi, French, and Spanish, but not English, so I'd like to at least have a slight grasp on some of those languages so I can hold conversations with my family over Skype and when they visit. Also my minor in college the first time was German studies.

I figure I'll be working full-time until I go back to school, so the time I spend studying these things would be limited. Let's say I sleep 8 hours, work 8 hours, and spend 2-3 hours per day maintaining myself (eating, cleaning, etc). That would leave about six hours max per day to study. I figured three, because I'd probably spend half my spare time working out and playing vidya.
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>>8020577
>3: My best friend growing up creates electronic music, EDM and dubstep and that sort of stuff, and I'd like to understand enough of it where I can collaborate with him.
Just get a small usb keyboard, download Ableton or FL and fiddle around with it.

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>bodybuilders figure out how to increase their strength and muscles with chemistry
>scientists haven't figured out how to increase their IQ and brain size with chemistry

how do you explain this /sci/ ?
17 posts and 3 images submitted.
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>>8019373
What is LSD?
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nootropics don't increase intelligence as well as steroids increase muscle, but even amphetamines are probably safer than some of the shit juicers use.

Or maybe most successful scientists care more about their health than some retarded wank contest.
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>>8019373
Have a good early childhood diet, don't eat lead, does that count?

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Stumbled on Kurzgesagt – In a Nutshell on youtube. Seem pretty decent on vulgarisation with nice animations on pure science thing, but boy, things seem to get political and biased fast. ( ended on addiction, where they say that it can be cured with the power of love. )

Is there is a decent channel on scientific vulgarisation that don't get preachy ?

pict unrelated.
39 posts and 2 images submitted.
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>>8019234
Vsauce, smarter every day.
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>>8019234
academia and science tends to swing politically left.

this is because the left wing is more likely to fund public science and research programs. if you wish to work in STEM, you will probably have to swing liberal yourself. sorry OP.
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>>8019261
Vsauce is shit.

"Hey, Michael here. What's up with X? Let me talk about Y now for 2 minutes. But what about Z? And that's what's up with X. -[end video]"

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Is there any project or collaboration under the label of "Quantum Computing" out there that is not turn out as utter bullshit and charlatanerie?

Despite the hype, nobody seems to have even the most basic concept of how this could be turned into something that works.

>pic: the latest bullshit PR-stunt
34 posts and 6 images submitted.
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dude a big black box
we now live in 2016 and not 1716.
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>>8019146
I can't wrap my head around how they're going to make an inconsistent observation do what they want.
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>>8019146
Imagine simulated annealing except testing every possible combination at once. It's not bullshit, you just don't understand it.

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I've read so much about modafinil (Provigil) being some sort of super-drug. That it's a powerful cognitive enhancer that will turn you into a hyper-focused, indefatigable ubermensch. I've read that it's the new adderall and the drug of choice for silicon valley executives. I've even read scaremongering articles which warn about how modafinil will radically change society and create a class division between those on it and everyone else.

I've been on stimulants before (adderall, ritalin) for months at a time, so I'm familiar with how they affect you in terms of energy, motivation, ability to focus, etc.

However, last year I got a few month prescription for modafinil. It literally did nothing. I started out at 100 mg per day, and I felt absolutely no cognitive changes (or even physical side effects for that matter). After about a week at that dosage, I experimented with 150 mg per day and 200 mg per day. Neither of these did anything other than to give me a headache and make me dehydrated.

I continued taking 100 mg per day for another few months, and I experienced absolutely no change in my feelings of tiredness, my ability to focus, or anything else.

So, am I just an anomaly or is modafinil no better than placebo? Apparently it has some benefits for narcoleptics, but are all of these normal healthy people who take it just really gullible? I don't get it.
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>>8019025
modafinil sucks compared to adderall , try noopept or selank/semax (ceлaнк/ceмaх)
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It's just good for not sleeping. It can make you skip one or a couple of nights in a row depending on your sensitivity to it, and has no crash effect like coffee. That's it. It has no cognitive enhancement effects and it's not supposed to.

Of course if you are on the 2nd day of no sleep, your cognition will be "enhanced" compared to if you stayed awake without taking anything.
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>>8019025
its a fucking meme.

i just spent the past 4 days trying it (family member has a prescription)

first day tried 100mg, second 200mg, third and fourth days 250mg

no improved performance in studying/learning, no increased motivation

the only effect was increased heartrate (maybe 4-6bpm increase?)


MEME
E
M
E

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Ask a failure of STEM phd student at a top 10 college in the world anything
28 posts and 5 images submitted.
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what's your favorite meme ?
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>>8018711
What field?
Did you quit or worse?

It will be OK, you will be fine.
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>>8018711
It's literally impossible to fail a PhD. How did you do it?

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Why is this tolerated?
48 posts and 2 images submitted.
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Because the most sure way to be successful in life is to tell people what they want to hear.
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>>8018614

Earthing is the process of decreasing ones' resistance to ground, thus increasing one's likelyhood of dying from electric shock.
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>>8018664
kek

>>8018624
This, and because it's efficient to have idiots wear badges so we can tell who to avoid.

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