There is usually a discount for products bought in bulk. The $4.00 12 pack of soda, could sit on the shelf for weeks. vs. buying 4 12 packs at $2.50 will allow 4x the product to go off the self, and allowing putting in more space for the product.
Except the chain with the 4x$2.50 doesn't stock more than 8 per sale cycle.
Meanwhile, the one that does 2-for-$7 will happily sell you one of them for $3.50, no problem.
Frankly I think [perpetual "sales" at the regular price] should be made illegal - after all it's false advertising.
It is illegal in some jurisdictions. Should be that way in all of them.
And the reaction to that is to change the prices periodically (say, monthly) - and for each product or product line have an occasional month where they're sold at the "regular" price.
I have watched that on some food items I consume a lot. A frozen-food entree at one chain grocery: $4.99k "regular" price, $3.50 (2-for-$7), over and over and over. 12-pack of a brand of soda at a different chain: $3:99 "regular", $2.50 (4-for-$12) ditto.
Hacker culture started during the Baby Boom's coming-of-age period. The government was in a massive crackdown on the young population, in a ways far too numerous and complex to go into here. The reaction was a distrust of the government and institutions related to its support and function, and both cultural and organized resistance to them. This reaction was massive.
Among those institutions were law enforcement and the criminal justice system, which had been massively perverted to attack the government's perceived opposition. This is when the drug war started. This is when RICO was passed, encouraging police to steal people's property. This is when concentration camps for dissidents were legislated and designed (but, fortunately, not used and the legislation later repealed). This is when the FBI, along with special "red squads" of local police, were used to infiltrate and disrupt political organizations (See COINTELPRO),. I could go on. Police were viewed as an invading army.
Similarly, the Vietnam conflict and the draft - a threat of slavery and death - were used to "channel" the new generation into desired occupations - and to stretch their entry into the job market out by pushing more of them into college than would historically have gone, in order to avoid an expected economic crash to dwarf the Great Depression. Institutions in any way connected with the war were considered culpable and attacked: Banks (help fund the war), chemical companies (make explosives, defoliants, and Napalm), the monopoly telephone company (collected a war tax).
In the midst of this (and to a large extent, in the California counter-culture hub that became Silicon Valley), personal computers were developed and the programs and applications for them were designed and/or deployed.
Is it any wonder companies (pre-institutional-web), founded and built up by the people who grew up in that environment, as part of that culture, would distrust law enforcement and favor the interests of their equipment's users over it?
And who's the point company in this conflict? Apple! Built by Jobs and Woz. Who got their seed money making "Blue Boxes" - devices to bypass the "war-supporting price-gouging" monopoly phone company's billing - during that era.
Doesn't surprise me at all. (Of course I lived through it, and to some extent was part of it. So I no doubt have personally seen more of it than the massively sanitized, repeatedly rewritten, dumbed-down, and politically-warped historical record, as promulgated by the current media conglomerates, will ever tell you.)
Actually caffeine doesn't raise your blood pressure, it widens your blood vessels which lowers it.
And three to five cups a day have been shown to substantially extend average lifespan. (And it's not "sick people tend to give up caffeine", like the little down-bump in death rateat one alcoholic drink per day proved to be.) So my (quite reputed) cardiologist PRESCRIBED a couple cups of coffee per day for me. B-)
Personally, I like to start the day with a warm shower. That way I get my body temp up without a big adrenaline spike - or at least a much smaller one - and less metabolic energy production (with the resulting free radical damage).
Trump's Sec. of War (Mattis) 'za board member of Theranos, before he (Mattis) went bankrupt.
As opposed to, say, Solyndra, just down the road about eleven miles, which blew a half Billion-with-a-B, under the watch (and into the pockets) of one of Obama's campaign "check bundlers" and his crew.
Gareth Corfield, a reporter for The Register who covered the cases from the courtroom, said it's disingenuous of Google to put on the mantle of journalism only when it suits them.
I guess Corfield never heard of "Pleading the Alternative".
Hint: This is a legal proceeding. "Disingenuosity" has nothing to do with it.
Once the billyclubs, handcuffs, writs, bailiffs, and judges are in play It's all about applying the law and interpretations of it in an internally consistent manner that makes you fit into a "within the law" category - no matter how round the hole and square the peg.
Everyone knows that the investor class and C-suite are the only ones that deserve any of the pie. If you want a raise, pull yourself up by your bootstraps and start your own multi-billion-dollar international corporation!
And if you ever hear a C-suit suit at your company enthuse about the book _Crossing the Chasm_, circulate your resume immediately!
That is EXACTLY what it prescribes. right at the end of one of the later chapters, and the key to both its success as a book and the crashing of the companies where execs try to follow its advice.
The book says that the benefits of the company are due to the founders and NOT the early hires, whom they enticed with stock options and who actually did the grunt- and brain-work that built the company's success. The advice is to dump them, before their options fully vest, and keep the swag for the inner circle. It also says they have negligible bargaining power, work because they are driven by their inner compulsions, and will quickly find another position with another company (to be ripped off again, of course).
The way it breaks companies: The execs who fall for this fire them TOO SOON, when the secret sauce recipes and corporate lore are still mostly in their heads, rather than dumped into documentation, procedures, and wage-slaves. So the people who are still making the company go are gone, the machine grinds itself into non-function, and nobody left really understands why it's broken or how to fix it.
It's unlikely we'd be able to bring back enough individuals to avoid inbreeding
Well then we can rename it the West Virginia Parakeet.
Wife:
1. HA!!!!
2. No, rename it the Eastern Colorado Parakeet
Me: ?
Wife: My father's family is from there. Do you have any idea how inbred they are? They call it "line breeding" there and say that's why their IQs are so high and they produce so many PhDs in their family.
(Me: Yes, they really DO produce PhDs. Also: They're inbred largely because they are descended from the early settlers, of which there were very few.)
but also believes that the pyramids are grain silos built for Joseph's prophesied famine
As opposed to the guy who thinks they were hydraulic rams for pumping irrigation water (high volume, low rise, for a long run to the fields) and has working models to show for it. B-)
Now that this structure of what appears to be the container for the extracellular fluid and a major shock absorber for tissues has been identified, it will be interesting to see what disease processes might be the result of degradation of its function.
I'd expect examination of breakdowns in this system to result in the causes of several diseases, currently dismissed as psychosomatic or as real but mysteries, to be identified.
I'd also expect that the structure might degrade in old age, and that this might be another source of age-related problems.
What about the Ugrinsky design, where it has both blades and channels?
Thanks. I hadn't seen that one.
It looks like a derivative of, perhaps an improvement on, the Benesh ("Sandia Savonius") rotor, which claimed 37% efficiency in the patent, and (if I recall correctly) 39% in later research.
I once calculated that a Benesh rotor of the same diameter as, about 4% taller than the diameter of, a good HAWT, would collect the same amount of wind power. (A VAWT has a rectangular swept area, so for the the same diameter and height as a HAWT it sweeps 4/pi times the area. Of course it's a bunch heavier, so you'd have "fun" erecting a 50-foot tower with one on it.)
If this rotor really does come in about 41% to 46% it's getting into the ballpark of a halfway decent HAWT. And the geometry is even easier to construct than the Benesh / Sandia design.
You have to be careful with ratings on VAWTs, however, if they're derived from wind tunnel tests. As the wind through the turbine in free air is slowed, the stream widens out. If you are testing INSIDE a wind tunnel (and it's not a whole bunch wider than the rotor), the tunnel restricts this spreading, forcing more of the air through the turbine, rather than letting it pass around. This makes the turbine seem much better than it is. In a tunnel with a square or rectangular cross-section the effect is more pronounced for VAWTs with rectangular swept areas than for HAWTs, which sweep a circle, too.
If you look around the web you'll find test setups where the rotor is set up OUTSIDE the end of the tunnel, and somewhat downstream of it, to avoid this problem.
(I note that the page you reference has a classic savonius at 20%, rather than 30%. It looks like another instance of the mislabled graph where the labels for the savonius and the "american multiblade" a.k.a. "patent windmill" were swapped.)
There is no point in hunting for a more efficient rotor design for two reasons:
1) The current designs are so near perfect efficiency that there's little to be gained for a lot of effort.
2) Efficiency of the rotor, once it's "good enough" is not a big deal. When your "fuel is free" except for the cost of the equipment to collect it, the significant measures of efficiency become "power per dollar spent on equipment" and "energy per dollar spent on maintenance and site and equipment amortization".
As with the carnot limit on how much of the energy in heat can be extracted by a heat engine, there is a theoretical limit to how much of the kinetic energy you can extract from the air (or other compressible fluid) passing through a given swept area. It is called the "Betz limit". It is16/27ths, about 59.3%. It occurs because extracting energy from the wind slows it down, reducing the amount of air passing through the mill. It works like the laffer curve in tax rates: If you take no energy as the wind passes by, you get no energy. If you take all the energy you stop the wind, so you get no energy. Somewhere between there's a percentage of extraction that gets you the maximum. For wind, that's 16/27ths.
As you approach the Betz limit you reach a point of diminisihing returns. You can throw progressively larger amounts of money into the design of your mill to get progressively smaller amounts of additional energy. Or you can spend a little extra money to just make your mill a little bigger, which lets it sweep a lot more area and collect a lot more energy.
Modern 3-bladed horizontal-axis wind turbines (HAWTs), running at a tip speed ratio in the 6 to 7 range, get within a few percent of Betz perfection. (Higher TSR would get you a little more, but above 6 you're starting to get to where a storm could make the airflow near the tips go supersonic, which is a problem structurally.) Scaling them up gives you more power per unit cost, so the utility mills converged to giant 3-blade HAWTs.
Horizontal axis because vertical axis designs tend to be either FAR less efficient or have terrible issues with vibration (though the helical darrius seems practical for small mills). The main advantage of a VAWT over a HAWT for small (i.e. off-grid residential/farm/small business) mills is that HAWTs need to be made to track the wind but "furled" in a high wind to avoid damage, which makes them more complex and failure prone. (HAWTs may need furling, too, but they don't need tracking and they're easier to overbuild to reduce the need for furling).
Three blade because one blade (like a maple leaf) and two-blade have vibration problems when yawing to face a changing wind. Three or more do not. More blades don't buy you any extra efficIency so three is the least expensive to build.
If you want to improve wind turbines you'd do well to concentrate on less expensive construction methods, rather than trying to chase the tiny amount of efficiency that's left.
If you want to improve other aspects of renewable energy, there's more room for improvement in control, storage, photovoltaic designs, direct collection of heat, and cooling (including radiative coupling to the four-degree kelvin cosmic background temperature through the "infrared window").
... currently physicists find the idea absurd and unreal because there's no way you can transport matter and its quantum state without first destroying it and then recreating it perfectly, due to Heisenberg's Uncertainty Principle.
Actually, current physics says you CAN, in principle, sidestep the Uncertainty Principle and transport the COMPLETE quantum state of an object - using quantum entanglement plus information transmission. BUT you can only get EXACTLY ONE copy at the receiving end and EXACTLY NO instances at the transmitting end.
So if full quantum state is necessary for individuality you can STILL have teleportation - at no more than the speed of light and no copies allowed.
Now this is a pretty violent operation: You have to have two sets of quantum-entangled matter that each have at least as many subatomic particles as you want to teleport, which have been previously transported (sublight) from the entanglement-creating site to the transmitting and receiving sites (while keeping that factory-fresh schrodinger smell intact). Then you have to use one set to interact with every particle of the thing you want to send (changing its state and thus destroying the original), collect a large amount of information that is generated as each particle is blasted, send it (no more than lightspeed) error-free to the receiving end, and use the info and the other set of entangled particles to beat a corresponding mass into exactly the shape and quantum states of the original.
But then you DO get (no more than one) exact to the quantum level version of the original at a new location.
Riker beams up, but leaves a copy. Years later, he is rediscovered by the enterprise crew. Dr. Crusher and Jordi agree they are identical and equally "Riker" so it must be true. Eventually the duplicate wanders off to lead a life of his own.
As a cryonics early-adopter I've spent a bunch of time thinking about what constitutes a continuation of "me" for the purposes of reanimation, uploading, etc.
Of course one class of scenarios that comes up is "What if the tech that can make someone you consider to be you-fixed-and-continued can make two (or more) of it.?" I'm happy with the interpretation that they're BOTH me, but quickly diverge into something like identical twins (that are STILL both validly me) as their experiences diverge. So I'm onboard with the "both Riker" interpretation.
What's wrong with "common sense regulation" on the press? Seems to be in vogue for the 2nd amendment, why shouldn't we try it for the first?
Sorry, I injected some logic into your thread. Please go back to arguing over scapegoats again.
It's pretty clear to me that the grandfather poster was both being sarcastic and pointing out that any arguments used for denying second amendment civil rights can be used to deny all the others, too.
"That's different!" doesn't cut it - because it's not.
If you're worried about totalitarianism as a result of *this* law, you are waaaay too late.
We're on the same page there. I was only pointing out that this isn't anything new, just yet another instance of the powers that be patching a hole that threatened to let newbies into the game.
Or more likely the application of laws where technically everyone is already a criminal aren't actually enforced the way you think they'll be.
When the government passes a bunch of laws that together criminalize everyone, then selectively enforce them, you have defacto totalitarianism without needing it to be dejure.
Once they have something on everybody, so they can select who they want to go after and do so. That's what such laws are FOR.
When the police can bust anybody their administrators want busted, and make it stick, it's called a "police state".
Any bets on whether the major banks (especially the Federal Reserve banks) or the Treasury Department would like to have felony-conviction level leverage over bitcoin and the people who operate it?
I had heard reports that the video showed her popping out of no where. Absolutely that is not what it shows. It shows here suddenly coming into the headlights lit region, not appearing from behind a bush.
Far worse than that.
It shows the pedestrian was obscured from the camera by the driver's side windshield wiper, until she was in the lane immediately in front of the car. It also shows she had reflectors on her bike and white or reflective shoes. She should have been easily visible.
If this is the camera used by the car for decisions, rather than one just for documenting whats happening, Uber has a major problem. (Ditto even if it's just the documentation monitor. It should have a better view than that.)
Also: Pedestrians have the right of way in most states, as I recall.
The driver looks to me like he's checking the instruments, not ignoring the road.
The exact problem is - you cannot PAY for an unlimited plan which is truly unlimited.... At best, the carriers offer EVERYONE unlimited and limit it.
The carriers COULD divide the available backhaul bandwidth at the edge routers, moment-by-moment, proportionally among the subscribers currently trying to use it, with those on capped plans stopping at their caps and any remainder distributed among those who haven't reached their caps. Further toward the backbone, any traffic would be divided among flows (ignoring the identity of the users of the flow) by the normal internet protocols' bandwidth-at-bottleneck sharing procedures. If they did this, oversubscription issues would be distributed fairly and I doubt there'd be complaints.
ANY other limit on the "unlimited" users is, IMHO, an obvious violation of the advertised and contracted service level. Doing it to the customers deliberately would be consumer fraud.
A Mexican trying to enter to do house painting, furniture hauling, or construction labor, for example, cannot legally enter the USA.
Sure they can - if they apply for a visa.
And, indeed, work visas are far undersubscribed, for lack of applicants.
The problem is that some employers are no more interested in visa holding foreign workers than they are in citizens. Both can bring enforcement actions for illegal pay levels, working conditions, and so on. Illegals can't, because if they were to complain they would be bringing attention to themselves and their illegal status. So the employer can work them like serfs and pay them similarly.
Unfortunately, in strongly competitive markets, if some of the employers use such cheap labor (and the laws are not enforced against them), the remainder have the choice between also breaking the law and going out of business.
Result: Neither citizens nor visa holders need apply. It's not that they "won't do the jobs". It's that they won't be hired.
I don't think I can handle another SpaceX, 3D printer, virtual reality, cryptocurrency, or Apple story.
Then you probably want to avoid medical-breakthrough stories.
3-D printers are starting to be big in medicine.
- Building replacement parts of complex organs by printing tissue scaffolds.
- Ditto by seeding them with stem cells (rather than waiting for the body to infiltrate them) and/or putting the right cells in the right place from the start.
- Making practice models for surgeons, before the surgery on the actual patient.
- Making custom prosthetics, dental appliances, crowns,...
(I could go on.)
Face it: Sometimes an invention turns out to have an explosion of applications.
Slashdot Mirror
There is usually a discount for products bought in bulk. The $4.00 12 pack of soda, could sit on the shelf for weeks. vs. buying 4 12 packs at $2.50 will allow 4x the product to go off the self, and allowing putting in more space for the product.
Except the chain with the 4x$2.50 doesn't stock more than 8 per sale cycle.
Meanwhile, the one that does 2-for-$7 will happily sell you one of them for $3.50, no problem.
And the reaction to that is to change the prices periodically (say, monthly) - and for each product or product line have an occasional month where they're sold at the "regular" price.
I have watched that on some food items I consume a lot. A frozen-food entree at one chain grocery: $4.99k "regular" price, $3.50 (2-for-$7), over and over and over. 12-pack of a brand of soda at a different chain: $3:99 "regular", $2.50 (4-for-$12) ditto.
Hacker culture started during the Baby Boom's coming-of-age period. The government was in a massive crackdown on the young population, in a ways far too numerous and complex to go into here. The reaction was a distrust of the government and institutions related to its support and function, and both cultural and organized resistance to them. This reaction was massive.
Among those institutions were law enforcement and the criminal justice system, which had been massively perverted to attack the government's perceived opposition. This is when the drug war started. This is when RICO was passed, encouraging police to steal people's property. This is when concentration camps for dissidents were legislated and designed (but, fortunately, not used and the legislation later repealed). This is when the FBI, along with special "red squads" of local police, were used to infiltrate and disrupt political organizations (See COINTELPRO),. I could go on. Police were viewed as an invading army.
Similarly, the Vietnam conflict and the draft - a threat of slavery and death - were used to "channel" the new generation into desired occupations - and to stretch their entry into the job market out by pushing more of them into college than would historically have gone, in order to avoid an expected economic crash to dwarf the Great Depression. Institutions in any way connected with the war were considered culpable and attacked: Banks (help fund the war), chemical companies (make explosives, defoliants, and Napalm), the monopoly telephone company (collected a war tax).
In the midst of this (and to a large extent, in the California counter-culture hub that became Silicon Valley), personal computers were developed and the programs and applications for them were designed and/or deployed.
Is it any wonder companies (pre-institutional-web), founded and built up by the people who grew up in that environment, as part of that culture, would distrust law enforcement and favor the interests of their equipment's users over it?
And who's the point company in this conflict? Apple! Built by Jobs and Woz. Who got their seed money making "Blue Boxes" - devices to bypass the "war-supporting price-gouging" monopoly phone company's billing - during that era.
Doesn't surprise me at all. (Of course I lived through it, and to some extent was part of it. So I no doubt have personally seen more of it than the massively sanitized, repeatedly rewritten, dumbed-down, and politically-warped historical record, as promulgated by the current media conglomerates, will ever tell you.)
Actually caffeine doesn't raise your blood pressure, it widens your blood vessels which lowers it.
And three to five cups a day have been shown to substantially extend average lifespan. (And it's not "sick people tend to give up caffeine", like the little down-bump in death rateat one alcoholic drink per day proved to be.) So my (quite reputed) cardiologist PRESCRIBED a couple cups of coffee per day for me. B-)
Personally, I like to start the day with a warm shower. That way I get my body temp up without a big adrenaline spike - or at least a much smaller one - and less metabolic energy production (with the resulting free radical damage).
If one sleeps past sunrise then dies then his death would be late rather than early :)
Unless he died in his sleep. B-)
I run on "substandard time" and always intended to be late to my funeral.
(So I joined a cryonics organization. That way I get to compound the pun by making it literal.)
Trump's Sec. of War (Mattis) 'za board member of Theranos, before he (Mattis) went bankrupt.
As opposed to, say, Solyndra, just down the road about eleven miles, which blew a half Billion-with-a-B, under the watch (and into the pockets) of one of Obama's campaign "check bundlers" and his crew.
"The Swamp" is an equal-opportunity corrupter.
What do they need the remaining ones for?
My wife just said "Somebody needs to turn out the lights."
Gareth Corfield, a reporter for The Register who covered the cases from the courtroom, said it's disingenuous of Google to put on the mantle of journalism only when it suits them.
I guess Corfield never heard of "Pleading the Alternative".
Hint: This is a legal proceeding. "Disingenuosity" has nothing to do with it.
Once the billyclubs, handcuffs, writs, bailiffs, and judges are in play It's all about applying the law and interpretations of it in an internally consistent manner that makes you fit into a "within the law" category - no matter how round the hole and square the peg.
Everyone knows that the investor class and C-suite are the only ones that deserve any of the pie. If you want a raise, pull yourself up by your bootstraps and start your own multi-billion-dollar international corporation!
And if you ever hear a C-suit suit at your company enthuse about the book _Crossing the Chasm_, circulate your resume immediately!
That is EXACTLY what it prescribes. right at the end of one of the later chapters, and the key to both its success as a book and the crashing of the companies where execs try to follow its advice.
The book says that the benefits of the company are due to the founders and NOT the early hires, whom they enticed with stock options and who actually did the grunt- and brain-work that built the company's success. The advice is to dump them, before their options fully vest, and keep the swag for the inner circle. It also says they have negligible bargaining power, work because they are driven by their inner compulsions, and will quickly find another position with another company (to be ripped off again, of course).
The way it breaks companies: The execs who fall for this fire them TOO SOON, when the secret sauce recipes and corporate lore are still mostly in their heads, rather than dumped into documentation, procedures, and wage-slaves. So the people who are still making the company go are gone, the machine grinds itself into non-function, and nobody left really understands why it's broken or how to fix it.
Wife:
1. HA!!!!
2. No, rename it the Eastern Colorado Parakeet
Me: ?
Wife: My father's family is from there. Do you have any idea how inbred they are? They call it "line breeding" there and say that's why their IQs are so high and they produce so many PhDs in their family.
(Me: Yes, they really DO produce PhDs. Also: They're inbred largely because they are descended from the early settlers, of which there were very few.)
but also believes that the pyramids are grain silos built for Joseph's prophesied famine
As opposed to the guy who thinks they were hydraulic rams for pumping irrigation water (high volume, low rise, for a long run to the fields) and has working models to show for it. B-)
Now that this structure of what appears to be the container for the extracellular fluid and a major shock absorber for tissues has been identified, it will be interesting to see what disease processes might be the result of degradation of its function.
I'd expect examination of breakdowns in this system to result in the causes of several diseases, currently dismissed as psychosomatic or as real but mysteries, to be identified.
I'd also expect that the structure might degrade in old age, and that this might be another source of age-related problems.
What about the Ugrinsky design, where it has both blades and channels?
Thanks. I hadn't seen that one.
It looks like a derivative of, perhaps an improvement on, the Benesh ("Sandia Savonius") rotor, which claimed 37% efficiency in the patent, and (if I recall correctly) 39% in later research.
I once calculated that a Benesh rotor of the same diameter as, about 4% taller than the diameter of, a good HAWT, would collect the same amount of wind power. (A VAWT has a rectangular swept area, so for the the same diameter and height as a HAWT it sweeps 4/pi times the area. Of course it's a bunch heavier, so you'd have "fun" erecting a 50-foot tower with one on it.)
If this rotor really does come in about 41% to 46% it's getting into the ballpark of a halfway decent HAWT. And the geometry is even easier to construct than the Benesh / Sandia design.
You have to be careful with ratings on VAWTs, however, if they're derived from wind tunnel tests. As the wind through the turbine in free air is slowed, the stream widens out. If you are testing INSIDE a wind tunnel (and it's not a whole bunch wider than the rotor), the tunnel restricts this spreading, forcing more of the air through the turbine, rather than letting it pass around. This makes the turbine seem much better than it is. In a tunnel with a square or rectangular cross-section the effect is more pronounced for VAWTs with rectangular swept areas than for HAWTs, which sweep a circle, too.
If you look around the web you'll find test setups where the rotor is set up OUTSIDE the end of the tunnel, and somewhat downstream of it, to avoid this problem.
(I note that the page you reference has a classic savonius at 20%, rather than 30%. It looks like another instance of the mislabled graph where the labels for the savonius and the "american multiblade" a.k.a. "patent windmill" were swapped.)
There is no point in hunting for a more efficient rotor design for two reasons:
1) The current designs are so near perfect efficiency that there's little to be gained for a lot of effort.
2) Efficiency of the rotor, once it's "good enough" is not a big deal. When your "fuel is free" except for the cost of the equipment to collect it, the significant measures of efficiency become "power per dollar spent on equipment" and "energy per dollar spent on maintenance and site and equipment amortization".
As with the carnot limit on how much of the energy in heat can be extracted by a heat engine, there is a theoretical limit to how much of the kinetic energy you can extract from the air (or other compressible fluid) passing through a given swept area. It is called the "Betz limit". It is16/27ths, about 59.3%. It occurs because extracting energy from the wind slows it down, reducing the amount of air passing through the mill. It works like the laffer curve in tax rates: If you take no energy as the wind passes by, you get no energy. If you take all the energy you stop the wind, so you get no energy. Somewhere between there's a percentage of extraction that gets you the maximum. For wind, that's 16/27ths.
As you approach the Betz limit you reach a point of diminisihing returns. You can throw progressively larger amounts of money into the design of your mill to get progressively smaller amounts of additional energy. Or you can spend a little extra money to just make your mill a little bigger, which lets it sweep a lot more area and collect a lot more energy.
Modern 3-bladed horizontal-axis wind turbines (HAWTs), running at a tip speed ratio in the 6 to 7 range, get within a few percent of Betz perfection. (Higher TSR would get you a little more, but above 6 you're starting to get to where a storm could make the airflow near the tips go supersonic, which is a problem structurally.) Scaling them up gives you more power per unit cost, so the utility mills converged to giant 3-blade HAWTs.
Horizontal axis because vertical axis designs tend to be either FAR less efficient or have terrible issues with vibration (though the helical darrius seems practical for small mills). The main advantage of a VAWT over a HAWT for small (i.e. off-grid residential/farm/small business) mills is that HAWTs need to be made to track the wind but "furled" in a high wind to avoid damage, which makes them more complex and failure prone. (HAWTs may need furling, too, but they don't need tracking and they're easier to overbuild to reduce the need for furling).
Three blade because one blade (like a maple leaf) and two-blade have vibration problems when yawing to face a changing wind. Three or more do not. More blades don't buy you any extra efficIency so three is the least expensive to build.
If you want to improve wind turbines you'd do well to concentrate on less expensive construction methods, rather than trying to chase the tiny amount of efficiency that's left.
If you want to improve other aspects of renewable energy, there's more room for improvement in control, storage, photovoltaic designs, direct collection of heat, and cooling (including radiative coupling to the four-degree kelvin cosmic background temperature through the "infrared window").
... currently physicists find the idea absurd and unreal because there's no way you can transport matter and its quantum state without first destroying it and then recreating it perfectly, due to Heisenberg's Uncertainty Principle.
Actually, current physics says you CAN, in principle, sidestep the Uncertainty Principle and transport the COMPLETE quantum state of an object - using quantum entanglement plus information transmission. BUT you can only get EXACTLY ONE copy at the receiving end and EXACTLY NO instances at the transmitting end.
So if full quantum state is necessary for individuality you can STILL have teleportation - at no more than the speed of light and no copies allowed.
Now this is a pretty violent operation: You have to have two sets of quantum-entangled matter that each have at least as many subatomic particles as you want to teleport, which have been previously transported (sublight) from the entanglement-creating site to the transmitting and receiving sites (while keeping that factory-fresh schrodinger smell intact). Then you have to use one set to interact with every particle of the thing you want to send (changing its state and thus destroying the original), collect a large amount of information that is generated as each particle is blasted, send it (no more than lightspeed) error-free to the receiving end, and use the info and the other set of entangled particles to beat a corresponding mass into exactly the shape and quantum states of the original.
But then you DO get (no more than one) exact to the quantum level version of the original at a new location.
Riker beams up, but leaves a copy. Years later, he is rediscovered by the enterprise crew. Dr. Crusher and Jordi agree they are identical and equally "Riker" so it must be true. Eventually the duplicate wanders off to lead a life of his own.
As a cryonics early-adopter I've spent a bunch of time thinking about what constitutes a continuation of "me" for the purposes of reanimation, uploading, etc.
Of course one class of scenarios that comes up is "What if the tech that can make someone you consider to be you-fixed-and-continued can make two (or more) of it.?" I'm happy with the interpretation that they're BOTH me, but quickly diverge into something like identical twins (that are STILL both validly me) as their experiences diverge. So I'm onboard with the "both Riker" interpretation.
Restore from saved game?
What's wrong with "common sense regulation" on the press? Seems to be in vogue for the 2nd amendment, why shouldn't we try it for the first?
Sorry, I injected some logic into your thread. Please go back to arguing over scapegoats again.
It's pretty clear to me that the grandfather poster was both being sarcastic and pointing out that any arguments used for denying second amendment civil rights can be used to deny all the others, too.
"That's different!" doesn't cut it - because it's not.
If you're worried about totalitarianism as a result of *this* law, you are waaaay too late.
We're on the same page there. I was only pointing out that this isn't anything new, just yet another instance of the powers that be patching a hole that threatened to let newbies into the game.
Or more likely the application of laws where technically everyone is already a criminal aren't actually enforced the way you think they'll be.
When the government passes a bunch of laws that together criminalize everyone, then selectively enforce them, you have defacto totalitarianism without needing it to be dejure.
Once they have something on everybody, so they can select who they want to go after and do so. That's what such laws are FOR.
When the police can bust anybody their administrators want busted, and make it stick, it's called a "police state".
Any bets on whether the major banks (especially the Federal Reserve banks) or the Treasury Department would like to have felony-conviction level leverage over bitcoin and the people who operate it?
I had heard reports that the video showed her popping out of no where. Absolutely that is not what it shows. It shows here suddenly coming into the headlights lit region, not appearing from behind a bush.
Far worse than that.
It shows the pedestrian was obscured from the camera by the driver's side windshield wiper, until she was in the lane immediately in front of the car. It also shows she had reflectors on her bike and white or reflective shoes. She should have been easily visible.
If this is the camera used by the car for decisions, rather than one just for documenting whats happening, Uber has a major problem. (Ditto even if it's just the documentation monitor. It should have a better view than that.)
Also: Pedestrians have the right of way in most states, as I recall.
The driver looks to me like he's checking the instruments, not ignoring the road.
Yesterday we saw an article saying the bitcoin blockchain contains kiddie porn inserted by the users.
Today we saw an article saying the senate has taken another step to amend the Communications Decency Act to cut into the broad protections [online services] have from legal liability for content posted by their users.
Maybe Bitcoin won't be around much longer because the miners will all be in jail as pornographers.
The exact problem is - you cannot PAY for an unlimited plan which is truly unlimited. ... At best, the carriers offer EVERYONE unlimited and limit it.
The carriers COULD divide the available backhaul bandwidth at the edge routers, moment-by-moment, proportionally among the subscribers currently trying to use it, with those on capped plans stopping at their caps and any remainder distributed among those who haven't reached their caps. Further toward the backbone, any traffic would be divided among flows (ignoring the identity of the users of the flow) by the normal internet protocols' bandwidth-at-bottleneck sharing procedures. If they did this, oversubscription issues would be distributed fairly and I doubt there'd be complaints.
ANY other limit on the "unlimited" users is, IMHO, an obvious violation of the advertised and contracted service level. Doing it to the customers deliberately would be consumer fraud.
I thought such robots had been in use for years.
Like the one that went on sale in Japan in 2013 , possibly descended from the one in the labs in 2010
Or the Agrobot Strawberry Harvester in 2012. Their current Series E is advertised as doing all the stuff TFA says is hard and just being developed.
And, indeed, work visas are far undersubscribed, for lack of applicants.
The problem is that some employers are no more interested in visa holding foreign workers than they are in citizens. Both can bring enforcement actions for illegal pay levels, working conditions, and so on. Illegals can't, because if they were to complain they would be bringing attention to themselves and their illegal status. So the employer can work them like serfs and pay them similarly.
Unfortunately, in strongly competitive markets, if some of the employers use such cheap labor (and the laws are not enforced against them), the remainder have the choice between also breaking the law and going out of business.
Result: Neither citizens nor visa holders need apply. It's not that they "won't do the jobs". It's that they won't be hired.
So the solution is to enforce the law.
I don't think I can handle another SpaceX, 3D printer, virtual reality, cryptocurrency, or Apple story.
Then you probably want to avoid medical-breakthrough stories.
3-D printers are starting to be big in medicine. ...
- Building replacement parts of complex organs by printing tissue scaffolds.
- Ditto by seeding them with stem cells (rather than waiting for the body to infiltrate them) and/or putting the right cells in the right place from the start.
- Making practice models for surgeons, before the surgery on the actual patient.
- Making custom prosthetics, dental appliances, crowns,
(I could go on.)
Face it: Sometimes an invention turns out to have an explosion of applications.