Recent comments in /f/explainlikeimfive
FizzyShin t1_j6o19fu wrote
Reply to Eli5: what is the difference between/the relationship between RNA and DNA? by LumpyEducation2588
DNA is the blueprint for making your proteins. RNA is a work order. It is a copy of a portion of the blueprint that is sent off to factory to get the protein made.
[deleted] t1_j6o1960 wrote
Reply to ELI5: Who buys the stock I sell? by Raven019
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[deleted] t1_j6o18yf wrote
Reply to ELI5: Who buys the stock I sell? by Raven019
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Skatingraccoon t1_j6o1814 wrote
Reply to ELI5: Who buys the stock I sell? by Raven019
It can be pretty much anyone. It could be me. It could be someone's personal financial manager. It could be a mutual fund manager or an automated program designed to trade according to specific rules. It could be your neighbor's grandmother. It could be the company buying back stock, but this doesn't happen too often - usually only when the company is in a really strong financial position or they want to prevent buyout, or in the case of something like Twitter they did get bought out and are trying to turn from a publicly traded company to a completely private one.
If you are trading at market values, which is about what people are willing to pay for the stock or sell it for, then you'll have a much easier time actually selling it. If you try to sell something that is currently trading at $10 for $100 you'll see that the order probably is not going to go through unless someone is desperately trying to buy as much of that stock as possible and put in a very high bid for a lot of them.
vm_linuz t1_j6o16gr wrote
Reply to comment by llanelliboyo in eli5: Why do tattoos cause vastly differing levels of pain just millimetres apart on your skin? by llanelliboyo
Haha they legit look like plant roots wrapping around a person
Ratnix t1_j6o14g8 wrote
Reply to ELI5: Who buys the stock I sell? by Raven019
If it'sa highly traded stock, there's always someone or some fund out there that's looking to buy it.
But something like my grandparents bought stock in the local phone company a few decades ago, and you have to hunt for someone willing to buy it
llanelliboyo OP t1_j6o13np wrote
Reply to comment by vm_linuz in eli5: Why do tattoos cause vastly differing levels of pain just millimetres apart on your skin? by llanelliboyo
Thanks again. I am now off to confuse myself by looking at nerve maps.
vm_linuz t1_j6o0yuu wrote
Reply to comment by llanelliboyo in eli5: Why do tattoos cause vastly differing levels of pain just millimetres apart on your skin? by llanelliboyo
Yup!
A picture would do it better justice, but basically the bigger nerve bundles are deeper in the skin, so they mostly activate when you're right over them
explainlikeimfive-ModTeam t1_j6o0v92 wrote
Reply to comment by [deleted] in ELI5: Why do computers need GPUs (integrated or external)? What information is the CPU sending to the GPU that it can't just send to a display? by WeirdGamerAidan
Please read this entire message
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lessmiserables t1_j6o0tsp wrote
Reply to ELI5: how is "productivity" measured? by Brickie78
From the BLS website (this would be the US, but applies to other countries as well):
> Some businesses do not produce goods for sale, but instead provide services. It is more difficult to count the number of units of output in such businesses. > > legal services > haircuts, beauty salons > mechanics and repairs > medical and dental services > > Often, businesses produce more than one good or sell more than one service. It is difficult to add up, for example, 300 chairs, 60 tables and 100 beds to express the total output of a furniture business. > > Therefore, for most goods and services, we measure output by the dollar amount sold. Expressing output in dollars makes it possible to measure goods and services that are difficult to count, and to add up different types of goods and services.
Public sector jobs (such as teachers and bus drivers) would normally be excluded.
bulksalty t1_j6o0q4b wrote
Reply to ELI5: how is "productivity" measured? by Brickie78
Usually when economists are discussing productivity, they're referring to the measure GDP divided by labor hours. So, for a therapist it's client billings per hour of therapist's time, for a bus driver it's passenger revenues, for a teacher it's pro rata tuition or the share of property taxes spent on education assigned to them.
[deleted] t1_j6o0muk wrote
Reply to ELI5: Who buys the stock I sell? by Raven019
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Gnonthgol t1_j6nzlmx wrote
Reply to ELI5: how is "productivity" measured? by Brickie78
This is such a huge subject that you can spend a decade at university learning business management and project methods only to find out that nobody knows how to measure productivity in a universal way. This does however not prevent people from trying, and usually failing.
For jobs like therapists you can try to measure productivity by measuring how fast patients stop requireing theraputic help. There are a number of factors you can measure such as the amount of perscribed medication (these cause side effects and kill the liver), episodes of psycotic breakdowns, how effective the patient is at work and at home, etc. But as you might imagine these numbers can be completely wrong in many cases. Not all therapists see the same type of patients so you will see very different performances. Some therapists might optimize for these metrics in a way which end up hurting the patient in the long run.
For bus drivers you can measure how often they crash (most full time bus drivers have about two minor crashes a year), you could ask the passengers, or just record complaints, you could measure how accurate they are between stops, some measure the acceleration on the bus trying to get the peaks as low as possible, you could measure the fuel consumption, etc. All of these are possible but again different drivers prefer different routes and will therefore perform differently according to these metrics. And you have conflicting metrics such as low acceleration rates penalizing emergency braking for safety, or making drivers run red lights to keep the time table.
Teachers are usually measured by standardized tests. All the pupils in the country take the same test which means you can compare the teachers and schools. But as soon as standardized tests are introduced it demonstrates social inequality in the sociaty and is also ripe for manipulation by the schools.
llanelliboyo OP t1_j6nzfqs wrote
Reply to comment by vm_linuz in eli5: Why do tattoos cause vastly differing levels of pain just millimetres apart on your skin? by llanelliboyo
I love thos answer but I have a follow-up :
Would the dense and sparse areas be so close together on my forearm. It was literally 1 or 2 mm difference in pain levels.
Zironic t1_j6nzase wrote
Reply to comment by Thrawn89 in ELI5: Why do computers need GPUs (integrated or external)? What information is the CPU sending to the GPU that it can't just send to a display? by WeirdGamerAidan
>It sounds like you're discussing vector processing instruction set with 512 bits which are very much specialized for certain tasks such as memcpy and not much else? That's just an example of a small SIMD on the CPU.
The vector instruction set is primarily for floating point math but also does integer math. It's only specialized for certain tasks in so far those certain tasks are SIMD, it takes advantage of the fact that doing a math operation across the entire memory of the CPU is as fast as doing it on just a single word.
In practice most programs don't lend themselves to vectorisation so it's mostly used for physics simulations and the like.
Spiritual_Jaguar4685 t1_j6nyyuq wrote
Reply to ELI5: how is "productivity" measured? by Brickie78
So, the term I think you'd like to learn more about is called "KPI", or "Key Performance Indicator".
In general a KPI is broad term used to quantify (measure) productivity, we give it a vague name because it can be totally unique to the person or role, and even within a specific role but different managers, different people might measure different KPIs.
For example - a teacher
Possible KPIs might be - students who pass the class, students enrolled in the class, rates of student drop out from class, number of office hours per week, number of students attending office hours.
For a bus driver - Number of accidents per year, number of people who ride the bus, number of late (or early) stops, miles traveled, fuel burned. Etc.
Some KPIs you want to minimize, some you want to maximize, it totally depends on what you're tracking.
A big of being a manager is knowing which KPIs are important to track in a direct report and how to influence them.
As an employee, you might want to understand your KPIs and how you're being measured. Because you might think you're hot shit, but if you have terrible KPIs you're objectively not doing well in the role. Alternatively, it might help you understand what your manager wants from you. You might think you job is all about doing X really well, and you might be God's gift to X, but if all your KPIs are related to Y, again, you might not be performing as your employer expects.
DoctorKokktor t1_j6nynl9 wrote
Reply to comment by NIRPL in ELI5 why time slows down as you go faster by -cool--beans-
Another good question :)
So basically, Euclidean geometry is founded on five posulates, the last of which is called the "parallel postulate". It turns out that the statement that describes this parallel postulate is ambiguous, and so you can have multiple descriptions/variations of this postulate (you can even omit the 5th postulate altogether!), all of which allow you to derive entirely new geometries.
Those 90 degree angles in different shapes are a consequence of the different statements of the parallel postulate. Those figures shown in the article are all examples of parallel lines, which at first seem preposterous but are a natural consequence of accepting a different version of Euclid's parallel postulate.
vm_linuz t1_j6nymx1 wrote
Reply to eli5: Why do tattoos cause vastly differing levels of pain just millimetres apart on your skin? by llanelliboyo
Your nerves feel pain.
Your nerves run from your brain, down your spine.
All down your spine, branches of nerves come out into your body, so you can feel that part of your body.
So that your arms can feel, a big nerve runs through your armpit, down along your elbow (your funny bone) and into your hand.
As it runs, this nerve branches like plant roots into your arm and up to your skin.
When tattooing in the sparse, root end areas, you feel less pain.
When tattooing in the dense, root branch areas, you feel more pain. All the nerves in that branch are activated at once.
[deleted] t1_j6ny1w3 wrote
Skatingraccoon t1_j6ny06m wrote
Reply to comment by rsclient in ELI5 Why do some coffee makers require the carafe to make contact with the tray for the coffee to drip? by Educational_Sir3783
4/10 is still a bit higher than I would expect lol. Is this an absolute scale where 1/10 is like the coffee burned you so bad you had to get your legs amputated?
Idiot_Esq t1_j6nxme4 wrote
Reply to ELI5: What is hypothermia ? by Huge-Reward3246
Hypothermia is your body getting cold and its reaction. It tries to handle this through various stages. You start with shivering which is your body's way of raising the temperature by use of your muscles. This often includes an increase in heart rate and blood pressure to carry more warmth from your core to your extremities. When that doesn't work, your body starts trying to conserve warmth by slowing down bodily functions such as slower heart rate and pulse. This is to preserve the heat in your core. Your hands and feet will cool off quickly and you'll start to feel lethargic and have a decrease in cognitive ability. Eventually, systems start shutting down leading to death.
NIRPL t1_j6nxhmx wrote
Reply to comment by DoctorKokktor in ELI5 why time slows down as you go faster by -cool--beans-
Thank you for explaining!
Regarding the non-euclidean geometries link, the images describing elliptical Euclidean and hyperbolic lines, why is the identified 90° angle significant? Or is that the point? Regardless of bend, we can assume a 90° angle will exist?
If I'm completely off-base with my question and wasting your time, feel free to say so lol
deltahigh t1_j6o1ax6 wrote
Reply to ELI5: Who buys the stock I sell? by Raven019
It could be individual retail investors, institutions or the brokerage itself. The brokerage is what is known as a broker-dealer. Think of it as a drug or car dealer who has to buy inventory then to sell it again for a profit. This is why stocks have a big/ask spread. That difference, among other things, is the profit available to a buyer/seller.