Well, you could always start with the sound alone, which has already been done.
As for image recognition, usually this is done using Fourier transforms as an edge finding algorithm. Basically, you can use a computer filter to throw out the bulk of the information, and keep only the most visually identifying features in the video. Changes in tint or timing won't affect the shapes and movements of these predominant edges.
Umm. To visualize this, imagine you take a full colour photo, and you trace it as best you can with a sharpie. Much much simpler, but still identifiable.
That's my guess anyhow. This would probably result in a number of false positives, but maybe they'll just flag certain videos and have a person make the final call if they are to be canned.
I was trying to say that somethings are harmful in excess but are harmless in small amounts (like the potatoes). I am skeptical that printers exceed this threshold despite the scientists' claim. I would be interested to see the particulate levels of these printers as compared to those of candles, oil lanterns and the like.
For one, it is clear that the particulate levels from printers do not come close to those of cigarette smoke as you can see the latter and not the former in the air.
How do these dangerous particles compare to those of say... a single lit candle?
The human body has a way of defending itself against all sorts of nasty stuff. Generally, things aren't bad for you unless you're exposed in excess. Apples contain cyanide, potatoes contain solanine, and cars emit carbon monoxide. Let's avoid all of them!
People who play the guitar do the same sort of thing. You'll notice they have long nails on the right hand for strumming and picking, and shortened nails on the left so they don't get in the way.
Now, these are effluent ponds from waste water treatment plants, which is why the algae is thriving. So, technically these planes would be powered on... human waste.
I wonder if it would be easier to make fuel out of the poop. How much processing does the algae save?
They were selling Veggietales CDs at a local mall. And the first track was happy birthday. If you could find your child's name on the list, then they could burn you a CD with the veggies singing happy birthday to your kid. Kinda neat.
That was in fact my point. That UAVs will not decrease the loss of life (much) for the wars being fought today simply because it is so rare that an aircraft of any type is shot down.
How many pilots have died in the Iraq war? The nice thing about these UAVs is they can fly circuits over an area for long hours. When an airstrike is called, a pilot fresh from his bathroom break flips off the auto pilot and launches a few rockets.
They would decrease the loss of life in a military campaign where air superiority isn't assured. And the day the US enters a war without air superiority is the day to start stockpiling supplies and building a really nice bomb shelter.
The reason they're controversial is because the Predator was pitched as a cheap drone, and cost almost as much as the manned fighters. The program on a whole was very very rocky at the start with lots of these things just randomly crashing (software) and then crashing.
It was just a lot of money to spend for almost no benefit. Though they may start paying for themselves now.
This is a CEO who is paid by his company to acquire other businesses. Instead, he is wasting time on Yahoo message boards. I think all slashdotters will agree that browsing online forums while at work is unethical.
But would it matter at all? I mean to say, what power does a state legislation have against a federal one? (honest question. I'm not American and don't know how the power hierarchy works) Other than the fact that it's the state that makes the drivers licences, is there any meat behind this bill?
The medical techniques uncovered may not be all that interesting for modern medicine.
The first Chinese emperor for instance demanded that his alchemists find him an elixir for immortality. So they gave him mercury, which of course eroded away his brain, causing insanity and then a premature death.
Some legends said an elixir of immortality existed in the islands of the eastern coast, and the emperor sent one of his alchemists along with sizeable military force to these islands with the instructions not to return until they had found the elixir. Some say that this caused the birth of Japan.
You're right. I didn't read it. I skimmed it and got confused and decided I didn't want to get into why people were upset with this particular company. But then someone posted that it was possible to build a space elevator. That's not true. With an unlimited amount of money, and the entire population of the earth working with the sole purpose of creating a space elevator, it is not currently physically possible.
The claim is to be able to build a space elevator. Which (unless you want to redefine the term) a device used to transport material from some celestial body into space. The only way this will work is with a cable extending slightly beyond geosynchronous orbit.
Now. Yes, you can say that with a very large amount of money and today's technology, you could build a space elevator on the moon to lift things from the moon into orbit around the moon. But we can not make one for earth. With an optimized cross sectional area to altitude function, the minimum tensile strength required is beyond that of anything we have measured. So far as I've read, including carbon nanotubes. (yes, they can theoretically be strong enough, but the highest tensile strength measured was 52GPa[wikipedia])
Are you sure? From what I've read, a cable of constant width would require a tensile strength of 382GPa.
Here's my source It's a paper in the american journal of physics by the americal association of physics teachers with a simplified version of the thought experiment and the math leading to the current concept of the space elevator. I don't believe you need a subscription to access this pdf. But let me know if I'm wrong and I'll get around it somehow.
Heck, I could build a space elevator today with enough money. ??? I'm confused.
In order for any object to span the length the space elevator would need to, it needs to have a density similar to that of graphite and a tensile strength no less than 65 GPa. And that's just to support itself. This is with the optimized shape.
Now the strongest thing we can make at length is carbon fibre at 5.6GPa, Kevlar at ~4GPa. For comparison, steel has a tensile strength of ~2GPa.
So far as I can tell. An infinite amount of money won't change this. That is, unless the money will be spent on advanced material research.
Plants do not require a full spectrum. As can be seen in this picture, plants absorb at specific frequencies (which you might have guessed by the fact that they are green)
So you could use fluorescent lights focused around the useful wavelengths. Cutting out the infra-red and ultraviolet that isn't useful. You also don't need the same intensity as sunlight because you have light all the time. No pesky clouds or nights. NASA uses LEDs to grow plants for experimentation in space.
Such fluorescent lights aren't really produced right now. Mainly because the only people who would want to use them to grow pot.
I for one have experienced outrageously childish competition and sabotage in the scientific field.
In one case. A submitted journal article was peer reviewed, and the review came back outrageously negative suggesting the article wasn't worth being published. Turns out the peer (who was suppose to be anonymous, but it's kinda obvious in such a small field) published similar results in another journal a month or so down the line. If our paper had not been accepted, this peer would have received credit for first discovery.
Academia has an uncomfortable amount of politics involved. Mind you... So does everything else. Except perhaps plumbing. I should become a plumber.
JDevers's response is nicely written. Ionizing radiation is particularly nasty to cells that reproduce quickly. This is why radiation therapy causes patients to lose their hair.
However, the fact that radiation is slightly more damaging to cancer cells than healthy cells is not the source of hormesis. It is a similar process to vaccination. Being exposed to the consequences of DNA mutation, the body takes extra precautions to combat this and thus becomes resistant to them. So the body builds up an immune defense against cancer from all causes.(ie, not just from the radiation, from chemicals too)
A medical physicist told me they were considering radiation therapy where they first expose the whole body to a low dose while shielding the tumor. Then a week or so later, apply the lethal dose to the tumor. The initial exposure to the rest of the body is like a warning. Get Ready! There's more coming soon!
Anywho. I believe the matter or hormesis is still a hotly debated topic, so there may be doctors which disagree with what I've said.
Slashdot Mirror
Well, you could always start with the sound alone, which has already been done.
As for image recognition, usually this is done using Fourier transforms as an edge finding algorithm. Basically, you can use a computer filter to throw out the bulk of the information, and keep only the most visually identifying features in the video. Changes in tint or timing won't affect the shapes and movements of these predominant edges.
Umm. To visualize this, imagine you take a full colour photo, and you trace it as best you can with a sharpie. Much much simpler, but still identifiable.
That's my guess anyhow. This would probably result in a number of false positives, but maybe they'll just flag certain videos and have a person make the final call if they are to be canned.
Oops. Sorry. I wasn't clear.
I was trying to say that somethings are harmful in excess but are harmless in small amounts (like the potatoes).
I am skeptical that printers exceed this threshold despite the scientists' claim. I would be interested to see the particulate levels of these printers as compared to those of candles, oil lanterns and the like.
For one, it is clear that the particulate levels from printers do not come close to those of cigarette smoke as you can see the latter and not the former in the air.
Same story from Australian paper.
Dude. 30 seconds on Google.
How do these dangerous particles compare to those of say... a single lit candle?
The human body has a way of defending itself against all sorts of nasty stuff. Generally, things aren't bad for you unless you're exposed in excess. Apples contain cyanide, potatoes contain solanine, and cars emit carbon monoxide. Let's avoid all of them!
People who play the guitar do the same sort of thing.
You'll notice they have long nails on the right hand for strumming and picking, and shortened nails on the left so they don't get in the way.
Now, these are effluent ponds from waste water treatment plants, which is why the algae is thriving.
So, technically these planes would be powered on... human waste.
I wonder if it would be easier to make fuel out of the poop. How much processing does the algae save?
I've actually seen something similar to this.
They were selling Veggietales CDs at a local mall. And the first track was happy birthday.
If you could find your child's name on the list, then they could burn you a CD with the veggies singing happy birthday to your kid. Kinda neat.
That was in fact my point. That UAVs will not decrease the loss of life (much) for the wars being fought today simply because it is so rare that an aircraft of any type is shot down.
not quite.
How many pilots have died in the Iraq war?
The nice thing about these UAVs is they can fly circuits over an area for long hours. When an airstrike is called, a pilot fresh from his bathroom break flips off the auto pilot and launches a few rockets.
They would decrease the loss of life in a military campaign where air superiority isn't assured.
And the day the US enters a war without air superiority is the day to start stockpiling supplies and building a really nice bomb shelter.
Not really.
The reason they're controversial is because the Predator was pitched as a cheap drone, and cost almost as much as the manned fighters. The program on a whole was very very rocky at the start with lots of these things just randomly crashing (software) and then crashing.
It was just a lot of money to spend for almost no benefit. Though they may start paying for themselves now.
I don't think you understand the big deal here.
This is a CEO who is paid by his company to acquire other businesses. Instead, he is wasting time on Yahoo message boards.
I think all slashdotters will agree that browsing online forums while at work is unethical.
But would it matter at all?
I mean to say, what power does a state legislation have against a federal one? (honest question. I'm not American and don't know how the power hierarchy works)
Other than the fact that it's the state that makes the drivers licences, is there any meat behind this bill?
As is evident by the fact that your slashdot number has one fewer digit than mine.
I admit it. The only times I've heard the words 'commodore 64' in conversation, they were part of a joke.
"I had the same issue with my Commodore 64..."
I really really thought you were joking.
You think your Commodore 64 is really neato
What kind of chip you got in there? A dorito?
This one makes me mad.
'people' go out and buy that fancy 8 megapixel camera for $500 and then shoot photos at lower quality to save on memory card space.
A more interesting question to ask is whether they will be hardwired in some way that Linux will NOT be installable on these machines.
The medical techniques uncovered may not be all that interesting for modern medicine.
The first Chinese emperor for instance demanded that his alchemists find him an elixir for immortality. So they gave him mercury, which of course eroded away his brain, causing insanity and then a premature death.
Some legends said an elixir of immortality existed in the islands of the eastern coast, and the emperor sent one of his alchemists along with sizeable military force to these islands with the instructions not to return until they had found the elixir. Some say that this caused the birth of Japan.
You're right. I didn't read it.
I skimmed it and got confused and decided I didn't want to get into why people were upset with this particular company.
But then someone posted that it was possible to build a space elevator. That's not true. With an unlimited amount of money, and the entire population of the earth working with the sole purpose of creating a space elevator, it is not currently physically possible.
The claim is to be able to build a space elevator. Which (unless you want to redefine the term) a device used to transport material from some celestial body into space. The only way this will work is with a cable extending slightly beyond geosynchronous orbit.
Now. Yes, you can say that with a very large amount of money and today's technology, you could build a space elevator on the moon to lift things from the moon into orbit around the moon. But we can not make one for earth. With an optimized cross sectional area to altitude function, the minimum tensile strength required is beyond that of anything we have measured. So far as I've read, including carbon nanotubes. (yes, they can theoretically be strong enough, but the highest tensile strength measured was 52GPa[wikipedia])
Are you sure? From what I've read, a cable of constant width would require a tensile strength of 382GPa.
Here's my source
It's a paper in the american journal of physics by the americal association of physics teachers with a simplified version of the thought experiment and the math leading to the current concept of the space elevator. I don't believe you need a subscription to access this pdf. But let me know if I'm wrong and I'll get around it somehow.
In order for any object to span the length the space elevator would need to, it needs to have a density similar to that of graphite and a tensile strength no less than 65 GPa. And that's just to support itself. This is with the optimized shape.
Now the strongest thing we can make at length is carbon fibre at 5.6GPa, Kevlar at ~4GPa. For comparison, steel has a tensile strength of ~2GPa.
So far as I can tell. An infinite amount of money won't change this. That is, unless the money will be spent on advanced material research.
They hire professionals to do research at NASA. You would need to list hydroponics as your main career, not a hobby.
Other than that. PVC pipe is too heavy, and they use LEDs rather than light bulbs, and find plants that respond to specific frequencies of light.
Plants do not require a full spectrum.
As can be seen in this picture, plants absorb at specific frequencies (which you might have guessed by the fact that they are green)
So you could use fluorescent lights focused around the useful wavelengths. Cutting out the infra-red and ultraviolet that isn't useful. You also don't need the same intensity as sunlight because you have light all the time. No pesky clouds or nights.
NASA uses LEDs to grow plants for experimentation in space.
Such fluorescent lights aren't really produced right now. Mainly because the only people who would want to use them to grow pot.
I for one have experienced outrageously childish competition and sabotage in the scientific field.
In one case. A submitted journal article was peer reviewed, and the review came back outrageously negative suggesting the article wasn't worth being published. Turns out the peer (who was suppose to be anonymous, but it's kinda obvious in such a small field) published similar results in another journal a month or so down the line. If our paper had not been accepted, this peer would have received credit for first discovery.
Academia has an uncomfortable amount of politics involved. Mind you... So does everything else. Except perhaps plumbing. I should become a plumber.
JDevers's response is nicely written.
Ionizing radiation is particularly nasty to cells that reproduce quickly. This is why radiation therapy causes patients to lose their hair.
However, the fact that radiation is slightly more damaging to cancer cells than healthy cells is not the source of hormesis. It is a similar process to vaccination. Being exposed to the consequences of DNA mutation, the body takes extra precautions to combat this and thus becomes resistant to them. So the body builds up an immune defense against cancer from all causes.(ie, not just from the radiation, from chemicals too)
A medical physicist told me they were considering radiation therapy where they first expose the whole body to a low dose while shielding the tumor. Then a week or so later, apply the lethal dose to the tumor. The initial exposure to the rest of the body is like a warning. Get Ready! There's more coming soon!
Anywho. I believe the matter or hormesis is still a hotly debated topic, so there may be doctors which disagree with what I've said.
"...making it a much better conductor. This gives the battery better staying power..."
Yup.