top Navy Debuts New Railgun That Launches Shells at Mach 7
1/2mV.terminall^2 since 83 miles away we presume it will be on the downslope of a parabolic-ish arc. 23lb at 300mph - 10kg at 136m/s = 10 x 136^2 = 185kJ give or take. So about the same as a Toyota Yaris going 40mph or a Ford Focus going 35mph.
These things will be going much much faster than terminal velocity, even 100 miles downrange. They simply will not have enough time to slow down. The shuttle on re-entry came in basically belly-into-the-wind to bleed of energy as fast as it could, and it still took a half hour and 6,000 miles to bleed off all that energy.
This shot is designed to be stremlined, and will not bleed very much energy at all. I wouldn't be surprised if its still moving mach 6 when it gets to its target... Try redoing your calculations for 4,000 MPH, and see what you get.
top LA Police Officers Suspected of Tampering With Their Monitoring Systems
Unions work to protect workers from a bad boss.
Unions work to maximize their own profits. everything else is secondary. They are a business that employs people, same as every other company, even the ones they are paid to protect their members from.
top Why Are We Made of Matter?
Ah, the obligatory
/. cheap shot at religion
Maybe if it weren't for the fact that organized religion is a form of tribalism/conformity, which is the sole cause of war. Without such
anti-social behaviors, wars would be impossible.
top It's Time To Bring Pseudoscience Into the Science Classroom
Please, name an established fact and explain how this differs from a normal fact.
Force equals mass times acceleration.
The equation yeilds accurate predictions for 100% of use cases where velocity is less than 0.01C, and distances are greater than 0.1 nm.
This fact differes from other facts becasue it involves a usefull method of predictiing behaviors of systems. It is verifiable, and falsifiable (although it has only been falsified for very high speeds where it is replaced by a more complicated set of equations, and very small distances where it is replaced by even more complicated equations). The point is that scientific facts are theroies that are overwhelmingly supported by evidence, and are falsifiable by nature. Much of the trouble people have understanding this concept stems from the unending stream of bullshit advertising they see on TV to the affect of "Our new dieting pull is scientifically proven to reduce your body mass index in just three minutes!", and other such nonsense.
Teaching critical thinking in school will only help so much because people inherently believe what they want to believe, even scientists. That is why there is so much faking of data in the science community. They are only human after all. A better solution would be a group who are granted the copyrights to most science related words like "scientifically", and "proves". This group could prevent most crap science just by suing advertisers out of existence who insist on improperly using these terms. After the media is forced to stop using the terms incorrectly, people will slowly stop using them incorrectly as well.
top Adaptation From
Flash Boys Offers Inside Look at High-Frequency Trading
So from whom is something being stolen, the one who offers to buy at $100 and receives $100? Or the one who offers to sell at $99.99 and receives $99.99? It seems by your definition all retailers are stealing from their customers.
The money is stolen from the second party.
The way it works is this. Party one offers the stocks for $99.99, but doesn't have the full amount of stocks that Party 2 wants to buy. Party 1 sells all of their stocks to Party 2 for $99.99, but the HFT intercepts the sale, and uses that information to buy shares from parties on other exchanges for $99.99, and then offers those shares to Party 2 at a slightly inflated price of $100.00. As the HFT has effectively depleted the stocks available, Party 2 has no choice but to buy from the HFT. The difference in price is within the margin, so Party 2 buys form the HFT never even knowing that they paid more for the stock than was originally asked, all Party 2 knows is that they offered $99.99, but that sale never completed, and the new price they could get was $100.00. The very act of offering $99.99 caused the price to change before the willing buyer at $99.99 and the willing seller at $99.99 could even complete the sale. All of this happens within fractions of a second.
The stock market only functions correctly when all parties have the same opportunity and access to the same information. When one party has access to information that no one else has, or can get, we call it insider trading, and the HFTs have created an artificial insider trading scenario. It is legal, but only just barely, and is still morally wrong. It adds nothing to the market, and unjustly enriches the HFT who provides no value added to the market.
top Adaptation From
Flash Boys Offers Inside Look at High-Frequency Trading
Any competent institutional broker has a wide variety of ways to defend its customers against that, all you need is a little time for their algorithms to work. If you don't have time, well, you pay the price just like any motivated seller.
The problem with dark pools, is that the customers need to be defended from their own broker. These trades happen so fast, and there is so much raw data out there that verifying that the price you got for your stocks was optimal is prohibitively time consuming, so no one double checks that their broker actually got the best price. The high frequency trading takes a very small amount from each trade (0.1% is the amount I saw in the article). Its small enought that it gets lost in thebackground noise of the market, but it is really no difference between this and stealing a penny every time someone withdraws money from an account. Stealing is stealing no matter how you dress it up, or pretend its for the good of "The Market".
top Apple, Google Go On Trial For Wage Fixing On May 27
You would think more victims of our "justice system" with nothing left to lose would kill the judges and police responsible for ruining their lives.
That is a remarkably difficult thing to do once a person has been found guilty, and up until then there is hope that the "system" will work in their favor.
Besides, the world wouldn't really be better off with hardened crimninals going around killing police, prosecutors and judges. That just leads to more corruption, not less.
top How Facebook and Oculus Could Be a Great Combination
Carmack screwed the analysis quite thoroughly, and now its too late for them. One of two scenarios is in play here:
1) Facebook bought OR because they wanted to diversify their holdings to make themselves more resilient to changes in their core market. In this case, Facebook will likely leave OR mostly alone and except for adding some money to the pot, but when it becomes clear that OR can not or will not scale at the growth that Facebook wants/needs, then it will get the axe.
2) Facebook bought OR because of some overriding strategy that involves OR's technology. In this case, Facebook will not be allowing OR to keep going the way they have been going, which more than likely means very little if any emphasis on VR gaming, and instead is intended as a social platform for virtual interaction. In this scenario, the best that OR can manage will be to get some games developed and released, but to that end there will likely be no support from Facebook.
Carmack was correct when he stated that OR needed two things: first, they would need cash infusions at several points to be able to scale at the rate that flash-in-the-pan games require in order to meet their sales goals. Without that cash, developers would be reticent to make any games that truly took advantage of the platform because then they would be locked to it with no guarantee that OR could manufacture enough units to *not* severely limit sales of the game developers product. Facebook solves the cash problem, but only by reintroducing another reason for developers not to get involved: Facebook itself. Facebook has burned many developers before, and consequently developers are less likely to become involved with them than they would have been with any other company (possibly excepting Microsoft).
The second thing that OR needs is developer support, which, for the reasons described above, the Facebook deal makes far more difficult than it would have been if OR had been bought by almost any other company.
All things considered, OR might fare better having been bought by Facebook than going it alone, but that is by no means clear.
top Did Facebook Buy Oculus To Counter Google Glass?
Facebook and Google are worlds apart. Googles Net earnings is greater than Facebooks gross revenue. Ditto, every other tech company that counts. Facebook has made a concerted effort to generate revenue any way they can, to the point of almost pissing off customers, and they still are almost an order of magnitude below any of the other big players (Google, MS, Apple). Worse still, the market is showing signs of a shift, and as Myspace can tell you, when your user base goes, they go quick.
top Did Facebook Buy Oculus To Counter Google Glass?
Everyone who uses Facebook seems to be in their own little self-centered world anyway. That's why they bought Oculus. It simply matches.
No, Facebook bought Oculus because they are sitting on a pile of cash, and no good strategy for making profits. Facebook is not Google (which has a massive short term revenue stream), and it has no long term strategy for making social pay out the big bucks. Facebook also does not have the engineering talent to follow Googles "try everything" strategy, so Facebook is trying desperately to buy revenue diversity instead of creating it for themselves. Ultimately this is a loosing strategy, and a sign of weak / stupid management with very poor planning skills.
Buying Whatsapp was a gamble on that companies ability to monetize an otherwise non-revenue generating user base. Oculus likewise has no proven user base. For an established company like Microsoft or Google, this kind of acquisition makes sense, since they can eat the loss if the investment goes sour (they usually do). Facebook cannot afford to have any of these mega deals go bad. They simply do not have the revenue stream and they can never again go IPO and raise another pile of cash. So instead of sitting on the cash, and waiting for a strong investment opportunity, they are squandering the money like kids in a store. It is hauntingly reminiscent of the dot-com boom, and likely will end the same way.
top Owner of Nortel Patents Sues Cisco For 'Immense' Patent Infringement
Once you accept the notion of patents in the first place (as a temporary monopoly on something in return for disclosing it instead of keeping it secret), it's a very small jump to buying and selling them. If an independent inventor comes up with an idea but doesn't have the capital to bring it to market, they can sell the patent to a bigger company.
That right there is the problem. Ideas themselves are essentially worthless without the many thousands of hours of work involved in taking an idea to market. The real work is done by the people who develop the product. the idea itself has always been considered pretty much worthless. That is why venture capitalists care far less about the idea than they do about the inventor(s). They want people who get things done. The idea itself is almost irrelevant.
That is the real reason why so many people hate the patent system. It unjustly enriches the worthless turds who produce nothing of value, but insist on being paid for their "contribution".
Along those lines, Patents (and copyright) should be irrevocably granted to individuals, and transfer should be forbidden. If an individual wishes to make money from a product, let them do the real work involved in bringing that product to society.
top How Satellite Company Inmarsat Tracked Down MH370
What I want to know, is why my phone (the smallest model made) can hold 1100 hours of compressed audio
... but these aircraft using NAND don't hold more than 2 hours of uncompressed audio (you don't want any quality sacrifices or artifacts from compression to screw up your analysis later) in a redundant array ...
Most of the newest versions do hold far more than 2 hours, but the average age of the worlwide air fleet is around 15-20 years. That menas equipment that was commisioned in 2000 (and the designs having been finalized many years before that). replacing existing FDRs and CVRs is just not cost effective, and will not be done unless mandated by a government agency. Newer plnaes all have significantly more advanced equipment, largely because the newer equipment is actually cheaper than the old tape style, but the units have to be self powered, and handle uncompressed recording for many hours across at least 4 channels. That menas significant space, and more importantly, significant compute power which eats watts. Modern processors like the RPi and Beaglebone can handle the load, but, again, were talking about equipment that came off an assembly line decades ago.
top More On the Disposable Tech Worker
The almighty dollar wins again
top Linux May Succeed Windows XP As OS of Choice For ATMs
There is no reason to write-off 10 year old ATMs. They are likely in good working order, and you can get spare parts. You do not throw away a 10 year old plane or helicopter either. These devices are more like elevators: Keep them in good order, and they will serve you well for a few decades. The only problem is that the people that selected the OS had no understanding at all what kind of device they were designing for.
Absolutely incorrect. These are network attached devices
by definition. Without regular patches against newly discovered (but old) security threats, these machines would quickly become the targets of digital thieves, and subsequesntly be throurohgly owned...
Unlike Linux, when MS EOLs a product there is really no reliable way of ensuring its continued security, and banks are supposed to be risk averse, espeically the simple to understand kind of risks with no upside.
They really have no choice but to replace the machines and/or upgrade the OS.
Sons of Anarchy Creator On Google Copyright Anarchy
I do not agree with some countries that subsidize artistic endeavors. Cuz then you have a selection of bureaucrats deciding which art is "art". But the laws regulating creative content should build an economy that rewards good work. to expect artists to make art just cuz is not fair, because everybody wants to make a living. maybe the GP should go back to completing his TPS reports, "just cuz".
So show me a system that gets the rewards to the
people who are creating the content (also known as the hard part). The system we have now gives almost all of the rewards to the group that uses copyright to *prevent* easy distribution of works. It used to be that we needed these middle men because otherwise no one had the capital required to distribute works (also known as the expensive part). These are businessmen who used to provide value added, but no longer provide anything , and in fact now actively *remove* value from the product by preventing creator and consumer from interacting directly, and by preventing the end consumer from choosing how and when they want to use the content they have paid for. The Internet made the business model of the distributor obsolete, and yet we allow copyright to be used to subsidize these otherwise worthless human beings. They produce nothing, and they actively take from society without giving anything that anyone wants or needs.
All things considered, our society is worse off, with the continued support of copyright, than it would be without it. Now if someone comes up with something different, I'm all ears, but the copyright vs no copyright is a no brainer for anyone who can understand the bigger picture.
top How Data Storage Has Grown In the Past 60 Years
Why always picking on the HD manufacturers? Your GigE network runs at 1,000,000,000 bits per second, not 1,073,741,824, what a scam!
Data transmissions are based on resonant frequencies of reference crystals, and have no fundamental connection to a binary counting system (except perhaps in terms of harmonics). Hard disk drives use sectors which at some basic level have to be addressed by a powers of two binary addressing system. This means that no matter what else you do with sector sizes or block sizes, the binary counting system *always* comes into the picture. Base 10 by contrast is the interloper there.
Memory is measured in multiples of powers of two because that's how the addressing works. Disks and network have no such fundamental limitations - they count in sectors and frames, which are themselves not necessarily powers of two.
Wrong, and wrong again. *All* computer peripherals transmit data to and from computers encoded in binary signals. It means that all computer based addressing is essentially binary. Back in the early years, some bit twiddling idiot tried to force a decimal system onto computers (
see BCD) The whole thing was such a stupid idea it was pretty effectively dropped for almost everything except scientific computing, and even there it wouldn't really be necessary if those pesky scientists were half as smart as they think they are.
top The Earth As a Gravitational Wave Detector
Thay're not saying that gravity waves are creating the signals. What they are saying is that if gravity waves are creating any signals at all, the size of the signals being measured limits the possible size of the gravity waves to smaller than a certain size. It is putting an upper bound on the possible size of gravity waves. This is important, because the previously determined upper bound on gravity wave size was 9 orders of magnitude bigger than it is now that we have these experimental results.
top 3 Years Later: A Fukushima Worker's Eyewitness Story
Not unsafe? The likelyhood of failure is higher than you think! Trying to contain the atomic dragon is a fools errand. The story dosent end with safe operation, even if that was possible? The waste products are still a major unsafe factor! Radioactive metals contain much more power than you realize. Not unsafe, tell that to the people affected by ionizing radiation, everyone on earth has an increased risk of cancer due to the atomic age! Don't be fooled by lack of published data linking it up! Radiation in your body from fusion isotopes are detectable! No where on the planet remains unaffected.
All of humanities activities carry with them a certain degree of danger. The more energy involved, the more dangerous they become. A significant amount of effort must be placed in decreasing those dangers, but there will always be danger.
Unless you plan to give up your computer, car, mass transit, pretty much all mass produced goods, and go back to an egrarian lifestyle, you will have to deal with industrial accidents. Engineers are pretty good at preventing known types of accidents from re-occuring, but the unknown will always cause bad things to happen. Claiming that Nuclear is worse than the alternatives just betrays your own ignorance. Indeed, we had all been largely ignorant of fossil fuels consequences for decades, but the use of Oil, Gas and Coal may have had far more dire consequences for the future of humanity than all of the radiation disasters put together. The liklihood that something else, we have been doing since the dawn of the industrial revolution, will be the death of us all is greater than the chance that nuclear will be our downfall.
In the end, so called "renewable" resources may be our best bet, but they are not sufficient for our needs currently, and may never be, and who knows what genie those technologies have bottled up for the future.
In the far distant future, mankind will have solved universe spanning power production using some technology we cant comprehend yet. In 1000 years, who knows what breakthrough power generation system we will use, but holding our breath waiting for a breakthrough will overwhelmingly likely end with all of us sitting in the dark. In 500 years, we most likely won't be using fossil fuels anymore because we probably wont have any more to use), and I'd give long odds that if we still have a global economy by that time, the underpinnings will be a fission or fusion power grid. Nothing else has the where-with-all to produce the power we have come to demand.
top Wolfram Language Demo Impresses
Wow, that's just bizarre. I don't know where you get your misinformation, but it's an elite grade of batshit.
I get my information by using the tools. I work with embedded machines where every instruction counts, and Boost as mentioned is good, but will never be competitive with homegrown C/C++ code purpose built for the task. The container classes all add great flexibility, but that comes with a performance hit. The folks behind Boost have done a great job of keeping it to a minimum, but its there nonetheless. Just because compute power keeps getting faster each year doesn't change the fact that you can't increase the power of an embedded system once its in the wild without spending more than the device is typically worth. That means you have to keep within your processor capacity today, and you have to leave enough for future software updates.
You sound like you come from a financial background, so let me educate you a little about the rest of the world: Most embedded software (>99% of the execution cycles in existence run on embedded systems) is made custom because the cost of processors is not trivial. When you are buying HFT servers that are involved with trades that net millions of dollars, nobody cares if the servers costs an extra $10,000 or not. In embedded systems where you can expect to sell
millions of units, a difference of a penny in the final unit cost is enough to justify having an engineer spend an entire year shaving that penny off the cost. Shaving processor cycles allows you to use a cheaper processor, which can save on the order of dollars. Needless to say that under those circumstances, the "minimal performance hit" of Boost costs far more money than it saves, and consequently is unacceptable for production use. about a month and a half ago
top Gesture Recognition Without Batteries
As these devices get closer and closer to "invisible" technology, it starts to lend some credibility to the idea that someday humans will be able to be retrofitted with various ESP-like abilities...
Ok, break out your tinfoil hats *now*
about a month and a half ago