The goal is to find a way to not intimidate the other guy while asking questions informed by your own domain knowledge. Everyone knows more than you about something
We all had a good laugh when we saw this abomination. It works if you have a clear line of sight to the target and isn't susceptible to counter-measures. But you trade your manoeuvrability, can't turn more than 180 degrees without risk of tangling yourself, that fibre optic leads straight back to wherever you launched it from. A treeline becomes th most OP counter measure in the history of counter measures. Dunno, maybe something will evolve from it, but I don't rate it yet.
It seems like tethered balloons with a fiber-optic line are pretty promising as relays if deployment can be ironed out. In the near future these will probably be deployed by mortar.
Everyone imagines women in STEM as being kind of tomboyish or not into "frivolous" things like makeup, but then they kind of scoff and roll their eyes when they do see a feminine woman doing the same thing they're doing.
Not a woman, but as a queer guy, this sort of meta-commentary will make you deeply unhappy in a less than accepting environment. You deserve to be able to feel as uncertain as anyone does, but if you can learn not to be too worried about being unique at a young age, you'll have a huge step up. You can succeed as any type of person. Women have to clear a higher bar in a lot of ways whether they're masc or fem, but becoming self-assured and convincing yourself that you belong where you are is a really critical skill
Everything about nuclear bombs decays with the square (or cube) of the distance from the explosion which means you still have to be pretty close. I.e., you're not going to be destroying many satellites with one bomb. Space is big. The height isn't relevant, what's relevant is the altitude difference between various orbits.
A very interesting twitter thread by DanielR that provides some insight into the background details of one of Ukraine's long-range one-way attack UAVs:
I'd want to offer more specific feedback here, but actually this is excellent analysis in something totally unexplored so I just feel the need to complete this comment so fewer people scroll pass
Are there even any pure non-alloy metals commonly used structurally anyway? A lay person might also say "this is made from aluminum, it's quite light and strong" but really it's a 6061 alloy with X and Y or whatever.
Eddy current brakes might be a good example.There are still "loops" of current, but they're disordered in a conductive plate. Bulk superconductors can show effects like this depending on if it's type 1/2 or what you're doing to it: e.g. in a coil gun with an inductive projectile (basically an induction motor unrolled), it will behave almost identically if the projectile's coil is replaced with a superconducting slug. If you did this with a normal conductor it'd act like the brake example and generate heat, but without resistance no entropy is generated, and the induced currents organize to "push back"
I think engine and transmission surface coatings/treatments would be basically impossible for them to characterize or replicate without dozens of power trains at a minimum, and even then it'd be a bit of a moonshot. There are very capable cars built with the industrial skill sets of the times, it's just that they were ludicrously expensive. I car company from then given access to a modern car would steal *tons* of new tech, but I just don't see part-for-part recreations being possible without decades of directed development
This seems like a bandage using unproven tech. As someone who doesn't drink, I wouldn't be keen on getting a car that could get me killed if it gave a false positive during an emergency. I am way more likely to be caught in a flash flood than I am to suddenly start drinking. It would also be a hassle if I'm having to use it every time I go to reposition my vehicle (such as when I'm loading and unloading goods for my job).
Well-made pizeoelectric actuators are limited by how well you can measure their position and how precisely you can control the voltage. If the positioning error is being measured optically (pretty safe bet), that's probably going to set the noise floor. Optical measurements are usually limited to around one wavelength of light, but if you're dealing with smooth surfaces that are already close to perfect alignment, you should be able to read phase differences in light hitting the sensor. 25nm is roughly 5% of the wavelength of light at the middle of the visible spectrum. Once you get down to fractions of a wavelength while keeping a nice surface finish, you sort of run out of problems to solve. Even random vibrations of atoms can spread out wavefronts significantly on scales a little smaller.
This is useful and isn't wrong, but it's worth keeping in mind that outside of fiat auto group, this happened through foreign ownership. Even in Fiat's case, picking up Chrysler was a huge part of staying large enough scale to survive. The mid-late 20th century is a different animal, but today a lot of this comes down to companies like VAG believing there's brand value in some aspects of Italian authenticity in brands like Lamborghini. Stuff like this isn't just mythology, but a little mythology goes a long way. The UK failed to establish enough mythology to counter balance how hard it is to do heavy industry there.
It's got a pretty mild side effect profile, and more importantly a very well-characterized side effect profile since it's such an old medication. This isn't either or: conventional management methods compliment medication well! No one should be fabricating dichotomies here when there's no need
Everyone's experiences are different, but your average person who is helped by SSRIs has the meds shoulder just enough of the load that they find it easier to make positive lifestyle improvements. You can't rebuild a house when it's still on fire
People will talk about ontology and history here, but a lot of it is that if you use tau instead of 2*pi, the math tends to get messier. You'll see this pretty clearly in physics or electrical engineering undergrad work. In matters of notation people do what others are doing and what works.
No, you just need more thrust to push through it despite the ill effects of the transonic regime. That, and design your airfoils/wings smartly, such as maximizing their critical Mach number (the slowest freestream Mach number that will result in shocks forming on the airfoil).
Although giant viruses are pretty pathological to some of that. Those structures don't appear in virions, but giant viruses are able to manufacture some organelles. A virion isn't alive in most ways, but viruses participate in life
Terrible experimental design getting grandfathered in over time into undergrad courses isn't anything new. This is especially predictable as RF bands have gotten more noisy. It wasn't long ago that you could anticipate a cellphone call with an AM radio
I was under the impression that the problem was that once the air reached the heart the mechanical/physical problem was that air is much more compressible than blood; that it would reach one of the chambers of the heart and the next contraction would squeeze the air and compress it, but not actually push it through the outgoing valve to the next chamber. Then when the muscle relaxed, there wouldn't be enough negative pressure to draw blood in from the incoming valve. Is that (roughly) correct?
Note that the wavelengths there are 18.75cm and 10cm respectively. You're going to get much different (and in all likelihood more serious) damage in larger animals, particularly in lung tissue, when areas with significantly different density are on the order of the size of the wavelengths of sound, allowing it to be scattered and absorbed. I'd also expect the rats to be somewhat protected by the fur which prevents good coupling into more vulnerable tissue.
Generating large amounts of electricity for AD assets isn't difficult. Basically everything that isn't man-portable consumes significant amounts of electricity powering radar systems. Lasers are a moderate step up in power demands, but it's not a step change. Diesel or gas turbine generators are a known quantity. Yes laser systems that don't get used very often will be more expensive per shot than those that do, but you're comparing several seconds of power to an expended missile with its own production and logistics trail to something that isn't expended, or at shorter range, cannons that need specialty rounds (modern systems often need to program airburst timing into each round). The tech is maturing but it's unreasonable to not expect these issues to be resolved as time goes on
There's a *really* small window between "metal piece penetrates composite survival cell" and "permanent or fatal injury". This easily could have taken his life
The goal is to find a way to not intimidate the other guy while asking questions informed by your own domain knowledge. Everyone knows more than you about something
We all had a good laugh when we saw this abomination. It works if you have a clear line of sight to the target and isn't susceptible to counter-measures. But you trade your manoeuvrability, can't turn more than 180 degrees without risk of tangling yourself, that fibre optic leads straight back to wherever you launched it from. A treeline becomes th most OP counter measure in the history of counter measures. Dunno, maybe something will evolve from it, but I don't rate it yet.
It seems like tethered balloons with a fiber-optic line are pretty promising as relays if deployment can be ironed out. In the near future these will probably be deployed by mortar.
Everyone imagines women in STEM as being kind of tomboyish or not into "frivolous" things like makeup, but then they kind of scoff and roll their eyes when they do see a feminine woman doing the same thing they're doing.
Not a woman, but as a queer guy, this sort of meta-commentary will make you deeply unhappy in a less than accepting environment. You deserve to be able to feel as uncertain as anyone does, but if you can learn not to be too worried about being unique at a young age, you'll have a huge step up. You can succeed as any type of person. Women have to clear a higher bar in a lot of ways whether they're masc or fem, but becoming self-assured and convincing yourself that you belong where you are is a really critical skill
Most queer people are bi. It's the same thing as gaydar, just with a better first guess
Everything about nuclear bombs decays with the square (or cube) of the distance from the explosion which means you still have to be pretty close. I.e., you're not going to be destroying many satellites with one bomb. Space is big. The height isn't relevant, what's relevant is the altitude difference between various orbits.
Aren't latitude and local atmospheric density both critical for estimating the EM effects of high altitude nuclear detonations?
Not in space.
No, in space. The ionosphere extends well beyond LEO
A very interesting twitter thread by DanielR that provides some insight into the background details of one of Ukraine's long-range one-way attack UAVs:
I'd want to offer more specific feedback here, but actually this is excellent analysis in something totally unexplored so I just feel the need to complete this comment so fewer people scroll pass
I hear it mostly from the younger crowd, 18-25 age range.
I can't imagine why you'd ever use pure aluminum structurally. It's hugely weaker than alloys.
Malleability/ductility
Are there even any pure non-alloy metals commonly used structurally anyway? A lay person might also say "this is made from aluminum, it's quite light and strong" but really it's a 6061 alloy with X and Y or whatever.
Aluminum cans are pretty close to pure, not totally but really close. They need to be readily deep drawn but are loaded pretty simply in practice
Eddy current brakes might be a good example.There are still "loops" of current, but they're disordered in a conductive plate. Bulk superconductors can show effects like this depending on if it's type 1/2 or what you're doing to it: e.g. in a coil gun with an inductive projectile (basically an induction motor unrolled), it will behave almost identically if the projectile's coil is replaced with a superconducting slug. If you did this with a normal conductor it'd act like the brake example and generate heat, but without resistance no entropy is generated, and the induced currents organize to "push back"
I think engine and transmission surface coatings/treatments would be basically impossible for them to characterize or replicate without dozens of power trains at a minimum, and even then it'd be a bit of a moonshot. There are very capable cars built with the industrial skill sets of the times, it's just that they were ludicrously expensive. I car company from then given access to a modern car would steal *tons* of new tech, but I just don't see part-for-part recreations being possible without decades of directed development
This seems like a bandage using unproven tech. As someone who doesn't drink, I wouldn't be keen on getting a car that could get me killed if it gave a false positive during an emergency. I am way more likely to be caught in a flash flood than I am to suddenly start drinking. It would also be a hassle if I'm having to use it every time I go to reposition my vehicle (such as when I'm loading and unloading goods for my job).
Using a driver monitoring cam seems like an accessibility nightmare
So are the actuators accurate to 25 nm also? Would that be the piezo crystals expanding at that level of resolution? (For want of a better word)
Well-made pizeoelectric actuators are limited by how well you can measure their position and how precisely you can control the voltage. If the positioning error is being measured optically (pretty safe bet), that's probably going to set the noise floor. Optical measurements are usually limited to around one wavelength of light, but if you're dealing with smooth surfaces that are already close to perfect alignment, you should be able to read phase differences in light hitting the sensor. 25nm is roughly 5% of the wavelength of light at the middle of the visible spectrum. Once you get down to fractions of a wavelength while keeping a nice surface finish, you sort of run out of problems to solve. Even random vibrations of atoms can spread out wavefronts significantly on scales a little smaller.
Neither did the Italians, though, and they’ve avoided the cataclysmic business outcomes that the British have undergone.
This is useful and isn't wrong, but it's worth keeping in mind that outside of fiat auto group, this happened through foreign ownership. Even in Fiat's case, picking up Chrysler was a huge part of staying large enough scale to survive. The mid-late 20th century is a different animal, but today a lot of this comes down to companies like VAG believing there's brand value in some aspects of Italian authenticity in brands like Lamborghini. Stuff like this isn't just mythology, but a little mythology goes a long way. The UK failed to establish enough mythology to counter balance how hard it is to do heavy industry there.
The difference is the symptom here is something most of these people would be better off controlling in other ways
It's got a pretty mild side effect profile, and more importantly a very well-characterized side effect profile since it's such an old medication. This isn't either or: conventional management methods compliment medication well! No one should be fabricating dichotomies here when there's no need
If you’re depressed try getting sunlight and exercise. If you’re fat, eat less sugar and chips (for 90% of people).
Everyone's experiences are different, but your average person who is helped by SSRIs has the meds shoulder just enough of the load that they find it easier to make positive lifestyle improvements. You can't rebuild a house when it's still on fire
People will talk about ontology and history here, but a lot of it is that if you use tau instead of 2*pi, the math tends to get messier. You'll see this pretty clearly in physics or electrical engineering undergrad work. In matters of notation people do what others are doing and what works.
Basic question: why does the capillary action work the convenient way, and not from the hot end to the colder one?
The change in volume on either end tosses a pressure differential across the flow, which helps the fluid less viscously bound
I've gotta recommend this video:
No, you just need more thrust to push through it despite the ill effects of the transonic regime. That, and design your airfoils/wings smartly, such as maximizing their critical Mach number (the slowest freestream Mach number that will result in shocks forming on the airfoil).
It's a multidimensional problem. Both thrust and especially minimization of wave drag help
The point here is that there are many things in cells that are not found in viruses.
Although giant viruses are pretty pathological to some of that. Those structures don't appear in virions, but giant viruses are able to manufacture some organelles. A virion isn't alive in most ways, but viruses participate in life
[удалено]
Terrible experimental design getting grandfathered in over time into undergrad courses isn't anything new. This is especially predictable as RF bands have gotten more noisy. It wasn't long ago that you could anticipate a cellphone call with an AM radio
They're out in force on the highways, which I'd bet are more critical to overnight travel. Tons of cars in ditches even then.
I was under the impression that the problem was that once the air reached the heart the mechanical/physical problem was that air is much more compressible than blood; that it would reach one of the chambers of the heart and the next contraction would squeeze the air and compress it, but not actually push it through the outgoing valve to the next chamber. Then when the muscle relaxed, there wouldn't be enough negative pressure to draw blood in from the incoming valve. Is that (roughly) correct?
No not really. Blood pressure isn't enough to really compress or expand the air much. It's about a 4% pressure fluctuation in a health person
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4561629/
Note that the wavelengths there are 18.75cm and 10cm respectively. You're going to get much different (and in all likelihood more serious) damage in larger animals, particularly in lung tissue, when areas with significantly different density are on the order of the size of the wavelengths of sound, allowing it to be scattered and absorbed. I'd also expect the rats to be somewhat protected by the fur which prevents good coupling into more vulnerable tissue.
Generating large amounts of electricity for AD assets isn't difficult. Basically everything that isn't man-portable consumes significant amounts of electricity powering radar systems. Lasers are a moderate step up in power demands, but it's not a step change. Diesel or gas turbine generators are a known quantity. Yes laser systems that don't get used very often will be more expensive per shot than those that do, but you're comparing several seconds of power to an expended missile with its own production and logistics trail to something that isn't expended, or at shorter range, cannons that need specialty rounds (modern systems often need to program airburst timing into each round). The tech is maturing but it's unreasonable to not expect these issues to be resolved as time goes on
Imagine this shit shattered Sainz's spine or something. Could have done with enough force and it just went the wrong direction. Wouldve been nasty
Or sent splinters through his femoral. He could have been dead before the marshals reached him
There's a *really* small window between "metal piece penetrates composite survival cell" and "permanent or fatal injury". This easily could have taken his life