These numerical simulation codes can sometimes do things funny things when you port from one architecture to another. One of the most frustrating debugging session I had was when I ported my code to Linux. One of my tree class's comparison operator evaluates the key and compares the calculated key with the value stored in the instance. It was crapping out in Linux and not in Windows. I eventually discovered Linux was using 80 bit registers for floating point computation but the stored value in the instance was truncated to 64 bits.
Basically they should be happy their code ported to two different architectures and ran all the way. Expecting same results for processes behaving choatically is asking for too much.
Almost all the CFD (Computational Fluid Mechanics) simulations us time marching of Navier-Stokes equations. Despite being very non linear and very hard, one great thing about them is they naturally parallelize very well. The partition the solution domain into many subdomains and distribute the finite volume mesh associated with each sub domain to a different node. Each mesh is also parallelized using GPU. At the end of the day these threads complete execution at slightly different times and post updates asynchronously. So even if you use the same OS and the same basic cluster, if you run it twice you get two different results if you run it far enough, like 10 days. I am totally not surprised if you change OS or architecture or big-endian-small-endian things or the math processor or the GPU brands the solutions differ a lot when you make 10 day forecast.
Google will merge the self driving car technology it has developed with some robots from ai.mit.edu and complete the mail delivery from the cluster boxes to the door. But first it has to complete the robot that will open the mail and merge it with the OCR technology it developed for the Gutenberg project.
The smart phones are getting smarter by leaps and bounds, dedicated gps systems with life time map updates are just 100$. The nav package has some minor advantages like muting the car audio, pausing the music, and some easier reach controls. But they nickel and dime you for map updates, and they are way over priced. You are better off not getting them.
Whats with people acting as though everyone and their grandma should do it in their personal computer for some new technology to be a phenomenal breakthrough? Does your grandma compute page rank of billions of pages of the net in her home computer?
At work I have two machines 32 cores 256 GB (one linux, one windows) for regression testing, a 32 core 24 GB machine for development and a 16 core 16 GB machine for paperwork, like emails, Rally, presentations etc. The spec is actually on the low end for a professional. Heck, we order the most powerful graphics cards on headless workstations without display (to do massively parallel computations).
BMW has a forward facing camera under the rear view mirror that scans for highway signs for posted speed limit and no-passing signs and displays them on the dash. I am not it is basic car or you have to buy some advanced tech package for it.
Only when the salt is mined you need to artificially add iodine. Almost all the salt used in USA comes from salt mines under the Great Lakes. There is a mile deep deposit of salt there and we simply mine it out. This salt has no natural iodine. But most places get their salt by evaporating sea water. The sea salt has so many other minerals too. Most important of it is the sea weed. That is full of iodine. So you don't have to artificially add iodine to them.
But the kind of powdered salt used here is known more commonly as "table salt" to distinguish it from "sea salt" or "rock salt". If you buy table salt, even in traditionally we-dont-need-no-artificial-iodine here countries (like India) you need to buy iodized version usually.
I have seen numerous home owners bathing their homes in light from a floodlight shining at an upward angle from the lawn. These lights are 500W halogens and some of them use two of them, 1 cool kW. Are you one of them? Do you have to do it? Of course, it is your money, how you spend it is your right. But it is also my right call such a spending idiotic, and draw inferences about the intellect and self confidence of such people.
I am very sure some engineer out there wanted to say thank you and legal stepped in and squashed it saying, "no no no, that guy might sue us for money! If we acknowledge we got some benefit from them, they might ask for huge sums of money. It is better to be thought as selfish jerks than to expose the company for huge claims!"
The screen would be locked out after every failed unlock attempt for the duration of t millisecons, t = 1 * 2^(n) , where n = nth consecutive failed unlock attempt.
My quick calculation shows the 50th unlock attempt would take 35000 years. The tenth unlock attempt would take 1 sec.
Ravi S
MAD magazine had a spoof some 20 years ago, about a movie without any plot or any story. Just a huge series of explosions saying, "all action no stupid boring talking parts". TV shows were moving in that direction with programs like Air Disaster, "Most thrilling moments of.." "Americas Most Watched videos..." etc etc. Even they provided too much of context and so finally came the corniest show of the genre, "Destroyed in Seconds!". Some presenter comes in and says something stupid like, "It only takes a minutes for things to get DESTROYED in SECONDS!". Then follows series of accidents, speed boat crashes, race track disasters, floods etc. They did not even have to invest in special effects, They just get video some guy shot and package it into half an hour. People have seen enough real disasters in video enough times. The disaster porn thirst has been fully quenched. Hollywood is not going to make much money off it.
Just last week I was reading that the less than 1000 or so combat planes in US Air Force has some 20 wings/squadrons whatever. And more than thousand unmanned aircraft have just two squadrons. (numbers very very approximate, quoting from memory and am too lazy to look up, not even sure what they call a brigade sized unit in USAF). Thus RPV pilots have much fewer promotion opportunities etc. So if there are not enough pilots, scrap the planes and do some retro mod and make them RPVs. Or ask Google to create a self flying plane.
So the suppression of females by the Y Chromosome is natural, and this is what evolution has intended and achieved, and the general oppression of the women in the society is just a natural extension of what is going on in cellular level. So all the male chauvinistic pigs can now breath a sigh of relief, "we can't help it. we are born this way".
An organism has to constantly renew its anti-bodies and virus detection signatures. We know immunity to certain kinds of microbes degrade as time goes by. It is expensive to maintain prototypes of all the microbes on had encountered ready to be mass produced at the sign of infection.
In some sense it is true to the societies too. We have not encountered measles for a long time. So we forgot how deadly this microbe is. And this allowed quacks and snake oil merchants to move it make some quick buck.
This measles outbreak, tragic as it is, will serve as a booster shot and help the society to appreciate the importance of the vaccination programs.
Basic math is, if 10% of users paying 10$ a month produces 1 billion a month revenue, it is enough for 100% of the users to produce 1$ in ad-revenue to be cost neutral. If the current set of users are not producing that much revenue, or if you have to be so obtrusive in ad serving to get just 1$ a month from the users, will it really work if it is not free? If FB users are split in two groups some getting "premium" and others not, what percentage of non-premium users would shun their premium friends?
Anyway, FB is a lek. Its main attraction is it is the main attraction for a significant percentage of others. All it takes is for a significant fraction of the FB users to skip FB, its status will decline exponentially. Microsoft Windows+ Office was a lek. Everyone used it because everyone else used it. At some point the negatives out weighed the positive, and it declined quite rapidly and seems to be struggling to find its footing.
It works in theory. In practice, unless you understand your code well, and the way compiler built the instructions well, and understood what these directives very well, you wont get any speed improvements. There are times when the over heads slow down the code and the simple minded implementation had brain dead locks, and you end up with slower code.
We have come a long way since the days of assembly and assembly in another name Fortran. But the overheads of the higher level languages have been masked a lot by the ever increasing speed and memory availability. Whole generations of programmers have come up, higher level languages with IDE and CASE tools from day one they fundamentally don't understand how the code actually works. They are continually stumped by the fact the code does what they tell it to do, not what they meant it to do.
May be Facebook knows you are not arab. But it gets paid to hose you with arabic ads. It probably knows your pain tolerance well too. It know how much it can pelt you with ads and make money before you decide to give up in disgust and go away from Facebook. May be by staying with Facebook even after being pelted with stupid ads for weeks, you tole Facebook algorithms, "ok this guys is good for at least two weeks ad blasts. May be more. Next time let us try three weeks". May be Facebook is not the chump here.
I created a new gmail id to get price quotes from auto dealers. And now Google keeps telling me I might now someone named Steve Lexus and wants me to add him to my circles. Well, at least they seem to have filtered out Jane Honda and Palvayantheeswaran Toyota and Poponopoulous Mitsubishi.
Why is Tesla going with Model X after Model S? Model S has been booked and paid for. If it is going for the alleged "family car" 40K model I can understand. But putting people who have paid money on the hold to pursue another mild variant of S does not make sense.
BTW, BMW is taking Tesla challenge seriously. It is moving to i3 a plug in electric with a range of 100 + - 20 miles with a range extender engine giving another 80 miles of range. Scheduled for late 2013.
Lotus has been working on a integrated IC engine + generator on a single block, tuned for running for long periods at max efficiency RPM. There are going to be lots of competition in the Chevy Volt segment and the Chevy Spark Nissan Leaf segments. In fact BMW is trying to squeeze in the middle of these two segments. Tesla is conspicuous by its absence.
Slashdot Mirror
Basically they should be happy their code ported to two different architectures and ran all the way. Expecting same results for processes behaving choatically is asking for too much.
Almost all the CFD (Computational Fluid Mechanics) simulations us time marching of Navier-Stokes equations. Despite being very non linear and very hard, one great thing about them is they naturally parallelize very well. The partition the solution domain into many subdomains and distribute the finite volume mesh associated with each sub domain to a different node. Each mesh is also parallelized using GPU. At the end of the day these threads complete execution at slightly different times and post updates asynchronously. So even if you use the same OS and the same basic cluster, if you run it twice you get two different results if you run it far enough, like 10 days. I am totally not surprised if you change OS or architecture or big-endian-small-endian things or the math processor or the GPU brands the solutions differ a lot when you make 10 day forecast.
Google will merge the self driving car technology it has developed with some robots from ai.mit.edu and complete the mail delivery from the cluster boxes to the door. But first it has to complete the robot that will open the mail and merge it with the OCR technology it developed for the Gutenberg project.
Just do an yum update lib.somedamnthing
The smart phones are getting smarter by leaps and bounds, dedicated gps systems with life time map updates are just 100$. The nav package has some minor advantages like muting the car audio, pausing the music, and some easier reach controls. But they nickel and dime you for map updates, and they are way over priced. You are better off not getting them.
Are the malicious apps being distributed from the playstore? Or from other app store?
Whats with people acting as though everyone and their grandma should do it in their personal computer for some new technology to be a phenomenal breakthrough? Does your grandma compute page rank of billions of pages of the net in her home computer?
At work I have two machines 32 cores 256 GB (one linux, one windows) for regression testing, a 32 core 24 GB machine for development and a 16 core 16 GB machine for paperwork, like emails, Rally, presentations etc. The spec is actually on the low end for a professional. Heck, we order the most powerful graphics cards on headless workstations without display (to do massively parallel computations).
BMW has a forward facing camera under the rear view mirror that scans for highway signs for posted speed limit and no-passing signs and displays them on the dash. I am not it is basic car or you have to buy some advanced tech package for it.
Looks like I was totally wrong, and the replies help me clear my preconception. Thanks to mods for modding the wrong info down.
But the kind of powdered salt used here is known more commonly as "table salt" to distinguish it from "sea salt" or "rock salt". If you buy table salt, even in traditionally we-dont-need-no-artificial-iodine here countries (like India) you need to buy iodized version usually.
If you have friends like them, you don't need enemies.
I have seen numerous home owners bathing their homes in light from a floodlight shining at an upward angle from the lawn. These lights are 500W halogens and some of them use two of them, 1 cool kW. Are you one of them? Do you have to do it? Of course, it is your money, how you spend it is your right. But it is also my right call such a spending idiotic, and draw inferences about the intellect and self confidence of such people.
I am very sure some engineer out there wanted to say thank you and legal stepped in and squashed it saying, "no no no, that guy might sue us for money! If we acknowledge we got some benefit from them, they might ask for huge sums of money. It is better to be thought as selfish jerks than to expose the company for huge claims!"
The screen would be locked out after every failed unlock attempt for the duration of t millisecons, t = 1 * 2^(n) , where n = nth consecutive failed unlock attempt. My quick calculation shows the 50th unlock attempt would take 35000 years. The tenth unlock attempt would take 1 sec. Ravi S
MAD magazine had a spoof some 20 years ago, about a movie without any plot or any story. Just a huge series of explosions saying, "all action no stupid boring talking parts". TV shows were moving in that direction with programs like Air Disaster, "Most thrilling moments of .." "Americas Most Watched videos..." etc etc. Even they provided too much of context and so finally came the corniest show of the genre, "Destroyed in Seconds!". Some presenter comes in and says something stupid like, "It only takes a minutes for things to get DESTROYED in SECONDS!". Then follows series of accidents, speed boat crashes, race track disasters, floods etc. They did not even have to invest in special effects, They just get video some guy shot and package it into half an hour. People have seen enough real disasters in video enough times. The disaster porn thirst has been fully quenched. Hollywood is not going to make much money off it.
Just last week I was reading that the less than 1000 or so combat planes in US Air Force has some 20 wings/squadrons whatever. And more than thousand unmanned aircraft have just two squadrons. (numbers very very approximate, quoting from memory and am too lazy to look up, not even sure what they call a brigade sized unit in USAF). Thus RPV pilots have much fewer promotion opportunities etc. So if there are not enough pilots, scrap the planes and do some retro mod and make them RPVs. Or ask Google to create a self flying plane.
The y just suppresses the female parts.
So the suppression of females by the Y Chromosome is natural, and this is what evolution has intended and achieved, and the general oppression of the women in the society is just a natural extension of what is going on in cellular level. So all the male chauvinistic pigs can now breath a sigh of relief, "we can't help it. we are born this way".
In some sense it is true to the societies too. We have not encountered measles for a long time. So we forgot how deadly this microbe is. And this allowed quacks and snake oil merchants to move it make some quick buck.
This measles outbreak, tragic as it is, will serve as a booster shot and help the society to appreciate the importance of the vaccination programs.
Anyway, FB is a lek. Its main attraction is it is the main attraction for a significant percentage of others. All it takes is for a significant fraction of the FB users to skip FB, its status will decline exponentially. Microsoft Windows+ Office was a lek. Everyone used it because everyone else used it. At some point the negatives out weighed the positive, and it declined quite rapidly and seems to be struggling to find its footing.
We have come a long way since the days of assembly and assembly in another name Fortran. But the overheads of the higher level languages have been masked a lot by the ever increasing speed and memory availability. Whole generations of programmers have come up, higher level languages with IDE and CASE tools from day one they fundamentally don't understand how the code actually works. They are continually stumped by the fact the code does what they tell it to do, not what they meant it to do.
May be Facebook knows you are not arab. But it gets paid to hose you with arabic ads. It probably knows your pain tolerance well too. It know how much it can pelt you with ads and make money before you decide to give up in disgust and go away from Facebook. May be by staying with Facebook even after being pelted with stupid ads for weeks, you tole Facebook algorithms, "ok this guys is good for at least two weeks ad blasts. May be more. Next time let us try three weeks". May be Facebook is not the chump here.
Claim B: Claim A is an urban legend. citation 1 citation 2 and you can find more on the net.
Claim C: Claim B is an urban legend.
Now can someone set up some cameras and prove Claim C? That would be supercool, one level recursive urban legend.
I created a new gmail id to get price quotes from auto dealers. And now Google keeps telling me I might now someone named Steve Lexus and wants me to add him to my circles. Well, at least they seem to have filtered out Jane Honda and Palvayantheeswaran Toyota and Poponopoulous Mitsubishi.
BTW, BMW is taking Tesla challenge seriously. It is moving to i3 a plug in electric with a range of 100 + - 20 miles with a range extender engine giving another 80 miles of range. Scheduled for late 2013.
Lotus has been working on a integrated IC engine + generator on a single block, tuned for running for long periods at max efficiency RPM. There are going to be lots of competition in the Chevy Volt segment and the Chevy Spark Nissan Leaf segments. In fact BMW is trying to squeeze in the middle of these two segments. Tesla is conspicuous by its absence.