Archived threads in /sci/ - Science & Math - 121. page
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Hi! I need help
I m 21 and today I visited my gynecologist. She found "something" on my right ovary and it is 76X6mm big. She hadn´t seen any blood inside of it. Also, it is hard on touch so it can´t be cyst. She also sent me to CT and to C125 test. First one is for 8 days and second for two. Now I can´t sleep, eat or anything because I don´t know what is going on. Is there anyone smarter?
How old are you?
Do you get abdominal pain frequently? Do you get sudden severe stabbing lower abdominal pain with sex ever?
7cm isnt terribly large and unless you have family members with ovarian cancer or HNPCC I wouldnt worry too much. Probably a benign growth.
It's cancer. I give it a year.
>>8100039
1 year when it's already over 7cm?
6months if we're lucky.
What is /sci/ reading this summer?
>pic unrelated
About wireless mesh nets
To overcome the NSA
>>8099953
Do you know what book that is? seems like a tractable intro to relativistic hydro. I might want to check it out
>>8099961
If that is the case, you should search papers about batman-adv
Based germany
So my uncles rad-onc told him that he should proton therapy for his brain mass but I'm wondering how this shit works that makes it "better" than standard x-rays.
The only thing I can think of is that since protons, unlike photons, have mass, one can better control the proton beam's flux.
Thoughts?
>>8099903
basically with x-ray you have to go all or nothing almost.
Which means you can destroy too much surrounding stuff, or not do enough damage.
With protons, as you said, they have mass and charge so you can give them a specific energy to start with, which determines how deep they go. They won't stop before, they won't stop after. Just at the right depth (relatively of course).
>>8099916
Are protons themselves more radioactive than photons?
It's quite expensive if you're not insured.
But neutron therapy is free of charge.
Is there any book dedicated to learning Maths from the ground up? Like basically something that is quite comprehensive in teaching the fundamentals of maths?
I've been wondering this as well. I could start with algebra and refresh fairly quickly, but ideally I really ought to start at the beginning.
>>8099780
I'm comfortable with integral and differential calculus. Just my fundamentals are quite weak and there are a lot of gaps in my knowledge
>>8099780
Learn mathematical logic and how to do simple proofs. How to prove it is a book that is self contained and very simple with the mathematics. If you do this then you'll cut down the time needed to learn mathematics in half as everything will be processed intuitivly
You and your friend Sarah are both on work experience at the local vets. You have been asked to round the weights of some of the patients so that the correct tablets can be given. Oscar weighs 45kg. You think this should round up to 50kg but Sarah thinks it should round down to 40kg. Who is right?
A) Rounding up is right
B) Rounding down is right
C) Both are right
D) Neither are right
fuck off atlas
>rounding by more than 10% of the value
Autistic virgin magician
Have you noticed that it's more difficult to find examples of maths being useful in the real world than it is to understand and apply the maths?
Is all maths past school level, dare I say it, overrated?
the best mathematics are mathematics that you feel the need for when solving a problem or studying a topic. Everyone has their own best mathematics.
>>8099668
>Have you noticed that it's more difficult to find examples of maths being useful in the real world than it is to understand and apply the maths?
but you're staring at a computer screen op
>>8099668
Congratulations, you just found out the secret fact /sci/ loves to deny vehemently. Applied math requires more intelligence than "pure" math. With a little bit of training it's not hard to become a proof robot who can memorize definitions, theorems and proofs. But a really smart guy like von Neumann recognizes what maths is needed for what real world application, and as a byproduct produces totally new fields of math.
Any news from the large hard-on (snicker) collider? Also could someone explain the higgs stuff again?
![large-hadron-collider-cern-beech-marten[1].jpg](https://i.imgur.com/LofrIfR.jpg "large-hadron-collider-cern-beech-marten[1].jpg")
hi, whats going no in this thread
>>8099694
topkek
Aren't they gonna like crank it up to OVER 9000 tev and prove there is no god or something?
What is the fundamental difference between a surface that diverges to infinity for a bounded, uncountable, 1-dimensional subset of its domain or rather when approaching the outermost limits of its open/bounded domain (and remains diverging/undefined outside the region bounded by that limit curve), and a surface that diverges to infinity when approacing the infinite limits of its open/unbounded domain (as in a paraboloid)?
Is the former surface somehow infinitely steeper than the latter?
>>8099604
Obviously the first one gets much steeper much faster. This about like asking the difference between [math]y=x^2[/math] and [math]y=\frac{1}{1-x^2}[/math].
>>8099604
>What is the fundamental difference between a surface that diverges to infinity for a bounded, uncountable, 1-dimensional subset of its domain or rather when approaching the outermost limits of its open/bounded domain (and remains diverging/undefined outside the region bounded by that limit curve), and a surface that diverges to infinity when approacing the infinite limits of its open/unbounded domain (as in a paraboloid)?
How correct is this sentence in terms of formal mathematical terms and definitions? Would you choose some terms differently when expressing what's being asked?
Do you like the thin manifolds? Aren't they somehow pleasant and interesting?
I know this is an Old topic but I've never feel boring about Nazi. There are no concrete evidences about what the hell were they doing but everything they were doing, I bet it has something really important, something brilliant.
Oh i know this one. The pic you posted the topic with is a theory that the nazis had a time machine and used red phospherus t opower it.
>>8099602
so wtf do you want to talk about opee
Glocke; The Wonder Weapon was nothing more than a Neutron Bomb, meaning it gave off radiation killing enemies, but did not damage infrastructure.
It was a failed experiment since they could only get it to work in a small circumference.
Those affected by the radiation died, so the research couldn't continue.
Soldiers that told stories of it floating didn't understand the testing procedures, which included suspending it from wires to better study it.
And yes, they DID use a water cooling towers base to suspend it from because it was already built...
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The contract for the dome and telescope structure of the European Extremely Large Telescope has today been signed. The E-ELT is expected to achieve first light in 2024 as the worlds largest optical/infrared telescope at 39.3 meters. The 400 million euro contract is the largest stake in the E-ELT investment and puts the telescope on track to not only be the largest and most ambitious but also the first of a new generation of extremely large telescope.
The E-ELT will tackle problems in galaxy evolution, study exoplanets as well as cosmology and the large scale structure...
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>>8099564
How can it be better than JWIST if it's on the ground?
>>8099589
It can outperform it in resolution with adpative optics. It outperforms it in some aspects of sensitivity by being fucking huge, it also has visible light capability.
Adaptive optics uses deformable mirrors to correct for seeing, the bluing affect of the atmosphere. Ground based telescopes can now recover the sorts of resolutions they would achieve in space. It has caveats, it is for now limited to the infrared and it works over small fields. E-ELT will push these constraints however and get a field of view...
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>>8099609
Some more info on AO.
https://en.wikipedia.org/wiki/Adaptive_optics
>junior year in high school
>took average math, algebra II
>did well but it was average math so who cares
>senior year I wanted to take an "advanced" "math" class so I took AP stats
>I was surrounded by formed calc I and II students all year who lightheartedly teased me about being in such an "average" math class prior to then
>I ended up getting A's in both...
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>>8099325
>high school calc
There's your problem. They rote-memorized their way through an already watered down course.
Calculus shouldn't be taught in high school at all. They should drill the fuck out of kids with trig and logic to prepare them for the actually difficult courses. The whole AP thing is a misguided sham.
>>8099325
Stats isn't math.
>>8099334
This, don't ever forget it.
are there methods to remember what you read besides spaced repetition? if i read some book now i know i'm not going to remember most of it in about a month unless i review it. are there methods that make this less difficult?
>>8099160
genetics
>>8099160
just think about it a lot.
good gif btw
>>8099160
If you really want to remember something I'd suggest writing a summary of it. Not type a summary, but write one.
Why does the US not use the metric system as its official system of measurement?
>>8099032
special snowflake syndrome
>>8099032
1. Because the cost to change is more than the benefits.
2. Only ones who care are high schoolers who can't into basic conversions.
>>8099032
>Why does the US not use the metric system as its official system of measurement?
What do you mean by "official system of measurement"?
You do know the U.S. Government defines 1 inch as exactly 2.54 cm, right?
And don't forget that nearly every nation on Earth uses a mix of SI, and traditional non-metric units.
Ask a Britbong how much they weigh, and you'll have to Google "stone".
Does it hurt the butts of mathematicians that physicists often invent their own mathematics and don't really need them?
Nobody need mathematics. They are just autists playing with their decimal numbers.
>>8099028
precisely
it's just a tool to do proper science
>>8099004
Physics and mathematics have had an incredibly deep, productive, and symbiotic relationship.
How much has body augmentation and cosmetics ruined genetic selection?
Everything from lipstick to hair color, to plastic surgery is meant to hide or fix what a person looks like. Does ugliness among a genetic demographic increase over time since the partners can't tell what the other person really looks like? How about child rearing? Does plastic surgery/breast implants increase the occurrence of women with small breasts? As time goes on, does that genetic trait also interfere with the ability to feed infants?
Aren't there specific genetic markers a...
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>>8098966
>I have no idea how evolution works but here's my long winded shitpost mixed with a bunch of asinine assumptions based on nothing but my complete and utter ignorance
sage
>>8099006
There is a chink somewhere in their genetics.
