If you by dimension mean size, there is a classical estimate of what radius an electron has. If one starts to put together a small sphere of "continuous" electric charge by moving infinitely small droplets of charge from infinity to the surface of the sphere, and continues to do so until the amount of energy consumed matches the relativistic energy of an electron, mc^2, one ends up with an charged sphere with radius 2.8E-15m.
However, in modern physics it is close to meaningless to talk about the size of an electron. The electron is considered very elemental, to the point is is modeled by a point charge. Please do not confuse the uncertainty, or the wave function, of an electron with its size. The wave function represents (among other things) the probability distribution of the position of the electron.
The proton, on the other hand, is not considered elemental (being made of quarks and gluons), or a point charge, and it does seems to have a size about 0.87E-15 m or so.
Interestingly enough, the classical size of size of the electron far surpasses the modern estimate of the size of the proton.
Yeah, I was thinking the same. I can't help but thinking that this is a "waging the dog" operation which only fools the most gullible of investors... I would have very little patience with this day dreaming if the took my money.
I am also amazed over the insane amount of money the Uber (and Tesla, and..) investors have, where does all this cash come from?
This sounds like a great scientific achievement, but isn't this almost exactly what the automotive industry has been doing for the last, say, 40 years?
Not with chairs, but with the somewhat more complicated automobiles...
There is excellent computer vision algorithms (e.g. in automotive industry) that can detect and track humans (even partially obscured) with great accuracy. There is excellent robot technology available (just look at Boston, or your average drone manufacturer). And there is no lack of "aim and fire" technology from the e.g. north american continent.
It is not all that difficult to assemble these pieces into a nightmarish unit. You can already now see (rather harmless soft air gun) prototypes of this on YouTube.
The university does not need to "manufacture autonomous lethal weapons", they just need to some generic AI stuff and leave the weaponization to others who probably are more than willing to do it.
This sounds like an arms race to me; if one army will obtains this technology, will the others sit around and accept it? Heck, even if all armies would collectively refrain from it, what prevents your favorite terrorist organization from doing it? It's not THAT high tech anymore.
The collected rain will probably be used for food production and drinking water. If the crops accumulate this silver iodide and then ingested, then what happens?
It is not entirely safe. From toxnet (https://toxnet.nlm.nih.gov/cgi-bin/sis/search/a?dbs+hsdb:@term+@DOCNO+2930):
(It does not mention increased cancer risk, however, and no concentrations are mentioned, and hopefully the concentrations will be small)
1) MILD TO MODERATE ORAL TOXICITY: Patients with mild
ingestions may only develop irritation or grade I
(superficial hyperemia and edema) burns of the
oropharynx, esophagus or stomach; acute or chronic
complications are unlikely. Patients with moderate
toxicity may develop grade II burns (superficial
blisters, erosions and ulcerations) are at risk for
subsequent stricture formation, particularly
esophageal. Some patients (particularly young
children) may develop upper airway edema.
a) Alkaline corrosive ingestion may produce burns to the
oropharynx, upper airway, esophagus and occasionally
stomach. Spontaneous vomiting may occur. The absence
of visible oral burns does NOT reliably exclude the
presence of esophageal burns. The presence of
stridor, vomiting, drooling, and abdominal pain are
associated with serious esophageal injury in most
cases.
b) PREDICTIVE: The grade of mucosal injury at endoscopy
is the strongest predictive factor for the occurrence
of systemic and GI complications and mortality.
2) SEVERE ORAL TOXICITY: May develop deep burns and
necrosis of the gastrointestinal mucosa. Complications
often include perforation (esophageal, gastric, rarely
duodenal), fistula formation (tracheoesophageal,
aortoesophageal), and gastrointestinal bleeding.
Hypotension, tachycardia, tachypnea and, rarely, fever
may develop. Stricture formation (esophageal, less
often oral or gastric) is likely to develop long term.
Esophageal carcinoma is another long term
I don't think that is particularly misleading. It just tells us that is ridiculously expensive to develop AD, and that Uber needs to do that for quite some time yet before they can start to make money from it. Will the investors sign up en-masse for a long period? I doubt it.
Uber lost $4.5 bn last year, in a revenue stream of $7.5bn. They were evaluated to be next-to-last in a large survey when it comes to AD technology and strategy. They are the ones with the largest stakes as their current business model is less than solid, and really need to bring AD to the streets ASAP in order to survive.
This accident shows how far they are from that - this accident was not a difficult case from any perspective, sensory (the video shows dashcam footage, without any kind of HDR functionality so the perceived "blackness" is misleading), world model, trajectory estimation, situation analysis or vehicle dynamics. This is a really a 101 case.
If the investors get the picture, they could be less fond of funding this cash burner, which will make Uber default lightening fast. Ubers' demise will probably affect the other AD inverstors' willingess to put up cash, slowing down the entire AD industry... and the "AD winter" may persist until the technology matures.
Even Waymo's 5600miles-between-interventions status is orders of magnitude off from any reasonable target. Do the math; US citizens drive 2.5 trillion miles annually, how many driver-is-supposed-to-intervene incidents would that imply per year? (about 450 million). Multiply that with accident probability for a driver with the alertness of someone who just saw that last 5000 miles pass OK). Even if the probability of a fatal accident would as low as 1 in 1000 for such events, that would translate into about half a million road fatalities. It's slightly larger than the current 30 000 deaths.
At any rate, I doubt that Uber can keep up appearances for the investors long enough for AD to save them.
Yes, such a process is already discovered and it's called telomerase reverse transcriptase (aka TERT or hTERT in humans), and more information can be found here: https://en.wikipedia.org/wiki/...
The article is requires some intimacy of cell biology, but, as expected, TERT does play a role in the life expectancy of a cell, immortality, cancer and there is some therapeutic potential (with e.g. isoprenoids and curcumin).... and for the record, I asked Brin & Page if I could install their company on my device, but they said that it came with some hefty system requirements.
If you read up on telomeres, e.g. here http://learn.genetics.utah.edu... you learn that telomeres are shortened for every DNA copy (which occurs at every cell division). The report states that the telomeres increased in length while in space. Two completely different thoughts crossed my mind: 1) Staying in space may thus decrease the cancer probability (alternatively increase life expectancy)?? Quite counter-intuitive considering the bombardment of ionizing radiation from space. 2) How on earth (pun intended) can the telomeres GROW? What is the mechanism for that? Do they grow in absolute sense, or didn't they just decrease as much compared to the twin?
Either the article is wrong/misinterpreted, or there is a mechanism to be discovered (?) that prolongs the telomers. The latter sounds like an ingredient in the water from the fountain of youth...
The motion of the water is upwards/right. If they were filming with a constant pan/tilt the water would appear moving down/left given their heading. Now, they locked the camera tracking at the object (at somewhere between 0 and 25k ft) and that would make the water appear to move upwards/right even if the object wasn't moving at all, due to the parallax effect. This is similar to how a street light appears to move relative to the background (when you look at it, i.e. track it), while the background and the light in fact are stationary, you're just changing perspective when you drive along the road.
So, it is entirely possible to get this effect with a very slow moving, or even stationary, object due to the parallax. The "apparent fast linear motion" is also consistent with the fast linear motion of the aircraft.
It could be a drone, a bird, or even a bag floating in the air. To tell otherwise, one would need more information, primarily the of the FoV of the camera.
I'm a bit surprised that I was modded down to 0, Offtopic.
I was trying to be insightful and funny at the same time. "Free Radical" is if course the chemical construct that is usually bad for your body and one that one tries to battle with "anti oxidants". On the other hand, the stuff that produces the free radicals also brings some joy and pleasure to us. Hence the tension between "what's good for you" and "what you enjoy".
In the same way Youtube is a source of joy, pleasure and enlightenment for a great many people, but I was trying to make the point that it also produces "social radicals", hence there is a very similar tension between "what's good for us" and "what we enjoy".
You have to take the upsides with downsides, i.e. a double edged sword.
Then I tried to make a pun out of it, using "radical" in the two different meanings. But maybe that was too much to figure out for most people...
Places on the approximate 43N latitude include New York, Rome, Tblisi, Beijing, South Dakota/Nebraska border Places near 43S include Puerto Montt (southern/middle Chile), Tasmania, New Zealand. Pretty much everything is above 43S.
Slashdot Mirror
... with 3 kB RAM, 8-colour TV display with 176x184 pixels, and magnetic tape storage.
I bet it is just as fun as this machine. At least for me.
Oh, this is an interesting question.
If you by dimension mean size, there is a classical estimate of what radius an electron has. If one starts to put together a small sphere of "continuous" electric charge by moving infinitely small droplets of charge from infinity to the surface of the sphere, and continues to do so until the amount of energy consumed matches the relativistic energy of an electron, mc^2, one ends up with an charged sphere with radius 2.8E-15m.
However, in modern physics it is close to meaningless to talk about the size of an electron. The electron is considered very elemental, to the point is is modeled by a point charge. Please do not confuse the uncertainty, or the wave function, of an electron with its size. The wave function represents (among other things) the probability distribution of the position of the electron.
The proton, on the other hand, is not considered elemental (being made of quarks and gluons), or a point charge, and it does seems to have a size about 0.87E-15 m or so.
Interestingly enough, the classical size of size of the electron far surpasses the modern estimate of the size of the proton.
Yeah, I was thinking the same. I can't help but thinking that this is a "waging the dog" operation which only fools the most gullible of investors... I would have very little patience with this day dreaming if the took my money.
I am also amazed over the insane amount of money the Uber (and Tesla, and..) investors have, where does all this cash come from?
Focus!!
This sounds like a great scientific achievement, but isn't this almost exactly what the automotive industry has been doing for the last, say, 40 years?
Not with chairs, but with the somewhat more complicated automobiles...
... but rather to customers, investors and suppliers, I think.
Replace the light with lead:
https://www.youtube.com/watch?...
Maybe it's not the first law they broke...
There is excellent computer vision algorithms (e.g. in automotive industry) that can detect and track humans (even partially obscured) with great accuracy.
There is excellent robot technology available (just look at Boston, or your average drone manufacturer).
And there is no lack of "aim and fire" technology from the e.g. north american continent.
It is not all that difficult to assemble these pieces into a nightmarish unit. You can already now see (rather harmless soft air gun) prototypes of this on YouTube.
The university does not need to "manufacture autonomous lethal weapons", they just need to some generic AI stuff and leave the weaponization to others who probably are more than willing to do it.
This sounds like an arms race to me; if one army will obtains this technology, will the others sit around and accept it? Heck, even if all armies would collectively refrain from it, what prevents your favorite terrorist organization from doing it? It's not THAT high tech anymore.
There are plenty of shops and restaurants in Swden that have signs with "we are cash free".
They have the right to accept or decline anyone as a customer, so they just think they can live without the customers who insist on using cash.
... trump Trump?
A dazed driver cannot assume responsibility of a ton of steel travelling fast down the highway within five seconds!
In fact, studies has shown that a driver is not "up to speed" in driving capability for a long time after a requested activation, up to 40 seconds.
Having a five second limit is simply irresponsible, and 40 seconds is almost same AD challenge as a level 4 system.
Abolish level 3!
What happens if the bolts go when in autopilot mode?
The collected rain will probably be used for food production and drinking water. If the crops accumulate this silver iodide and then ingested, then what happens?
It is not entirely safe. From toxnet (https://toxnet.nlm.nih.gov/cgi-bin/sis/search/a?dbs+hsdb:@term+@DOCNO+2930):
(It does not mention increased cancer risk, however, and no concentrations are mentioned, and hopefully the concentrations will be small)
1) MILD TO MODERATE ORAL TOXICITY: Patients with mild
ingestions may only develop irritation or grade I
(superficial hyperemia and edema) burns of the
oropharynx, esophagus or stomach; acute or chronic
complications are unlikely. Patients with moderate
toxicity may develop grade II burns (superficial
blisters, erosions and ulcerations) are at risk for
subsequent stricture formation, particularly
esophageal. Some patients (particularly young
children) may develop upper airway edema.
a) Alkaline corrosive ingestion may produce burns to the
oropharynx, upper airway, esophagus and occasionally
stomach. Spontaneous vomiting may occur. The absence
of visible oral burns does NOT reliably exclude the
presence of esophageal burns. The presence of
stridor, vomiting, drooling, and abdominal pain are
associated with serious esophageal injury in most
cases.
b) PREDICTIVE: The grade of mucosal injury at endoscopy
is the strongest predictive factor for the occurrence
of systemic and GI complications and mortality.
2) SEVERE ORAL TOXICITY: May develop deep burns and
necrosis of the gastrointestinal mucosa. Complications
often include perforation (esophageal, gastric, rarely
duodenal), fistula formation (tracheoesophageal,
aortoesophageal), and gastrointestinal bleeding.
Hypotension, tachycardia, tachypnea and, rarely, fever
may develop. Stricture formation (esophageal, less
often oral or gastric) is likely to develop long term.
Esophageal carcinoma is another long term
I don't think that is particularly misleading. It just tells us that is ridiculously expensive to develop AD, and that Uber needs to do that for quite some time yet before they can start to make money from it. Will the investors sign up en-masse for a long period? I doubt it.
Uber lost $4.5 bn last year, in a revenue stream of $7.5bn. They were evaluated to be next-to-last in a large survey when it comes to AD technology and strategy.
They are the ones with the largest stakes as their current business model is less than solid, and really need to bring AD to the streets ASAP in order to survive.
This accident shows how far they are from that - this accident was not a difficult case from any perspective, sensory (the video shows dashcam footage, without any kind of HDR functionality so the perceived "blackness" is misleading), world model, trajectory estimation, situation analysis or vehicle dynamics. This is a really a 101 case.
If the investors get the picture, they could be less fond of funding this cash burner, which will make Uber default lightening fast. Ubers' demise will probably affect the other AD inverstors' willingess to put up cash, slowing down the entire AD industry... and the "AD winter" may persist until the technology matures.
Even Waymo's 5600miles-between-interventions status is orders of magnitude off from any reasonable target. Do the math; US citizens drive 2.5 trillion miles annually, how many driver-is-supposed-to-intervene incidents would that imply per year? (about 450 million). Multiply that with accident probability for a driver with the alertness of someone who just saw that last 5000 miles pass OK). Even if the probability of a fatal accident would as low as 1 in 1000 for such events, that would translate into about half a million road fatalities. It's slightly larger than the current 30 000 deaths.
At any rate, I doubt that Uber can keep up appearances for the investors long enough for AD to save them.
The nice and constructive feedback would be
Yes, such a process is already discovered and it's called telomerase reverse transcriptase (aka TERT or hTERT in humans), and more information can be found here: https://en.wikipedia.org/wiki/...
The article is requires some intimacy of cell biology, but, as expected, TERT does play a role in the life expectancy of a cell, immortality, cancer and there is some therapeutic potential (with e.g. isoprenoids and curcumin). ... and for the record, I asked Brin & Page if I could install their company on my device, but they said that it came with some hefty system requirements.
If you read up on telomeres, e.g. here http://learn.genetics.utah.edu... you learn that telomeres are shortened for every DNA copy (which occurs at every cell division). The report states that the telomeres increased in length while in space. Two completely different thoughts crossed my mind:
1) Staying in space may thus decrease the cancer probability (alternatively increase life expectancy)?? Quite counter-intuitive considering the bombardment of ionizing radiation from space.
2) How on earth (pun intended) can the telomeres GROW? What is the mechanism for that? Do they grow in absolute sense, or didn't they just decrease as much compared to the twin?
Either the article is wrong/misinterpreted, or there is a mechanism to be discovered (?) that prolongs the telomers. The latter sounds like an ingredient in the water from the fountain of youth...
The motion of the water is upwards/right. If they were filming with a constant pan/tilt the water would appear moving down/left given their heading.
Now, they locked the camera tracking at the object (at somewhere between 0 and 25k ft) and that would make the water appear to move upwards/right even if the object wasn't moving at all, due to the parallax effect. This is similar to how a street light appears to move relative to the background (when you look at it, i.e. track it), while the background and the light in fact are stationary, you're just changing perspective when you drive along the road.
So, it is entirely possible to get this effect with a very slow moving, or even stationary, object due to the parallax. The "apparent fast linear motion" is also consistent with the fast linear motion of the aircraft.
It could be a drone, a bird, or even a bag floating in the air. To tell otherwise, one would need more information, primarily the of the FoV of the camera.
If you think they are good (for you).
I'm a bit surprised that I was modded down to 0, Offtopic.
I was trying to be insightful and funny at the same time. "Free Radical" is if course the chemical construct that is usually bad for your body and one that one tries to battle with "anti oxidants". On the other hand, the stuff that produces the free radicals also brings some joy and pleasure to us. Hence the tension between "what's good for you" and "what you enjoy".
In the same way Youtube is a source of joy, pleasure and enlightenment for a great many people, but I was trying to make the point that it also produces "social radicals", hence there is a very similar tension between "what's good for us" and "what we enjoy".
You have to take the upsides with downsides, i.e. a double edged sword.
Then I tried to make a pun out of it, using "radical" in the two different meanings. But maybe that was too much to figure out for most people...
...tobacco smoke, alcohol, UV light and sugar.
The usual duble edged sword, I guess.
Well, that is kind of why I wrote 'the REGION' in the title...
Places on the approximate 43N latitude include New York, Rome, Tblisi, Beijing, South Dakota/Nebraska border
Places near 43S include Puerto Montt (southern/middle Chile), Tasmania, New Zealand. Pretty much everything is above 43S.
... while the Truth looks for its sandals.
Hopefully RIP (FutureWave | ShockWave | Macromedia | Adobe) Flash 1995 - 2018.
Mourned by few.
BTW: Did anyone find out whether the ammo Steve used was made out of silver?