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Math

Ask Slashdot: How Reproducible Is Arithmetic In the Cloud? 226

goodminton writes "I'm research the long-term consistency and reproducibility of math results in the cloud and have questions about floating point calculations. For example, say I create a virtual OS instance on a cloud provider (doesn't matter which one) and install Mathematica to run a precise calculation. Mathematica generates the result based on the combination of software version, operating system, hypervisor, firmware and hardware that are running at that time. In the cloud, hardware, firmware and hypervisors are invisible to the users but could still impact the implementation/operation of floating point math. Say I archive the virutal instance and in 5 or 10 years I fire it up on another cloud provider and run the same calculation. What's the likelihood that the results would be the same? What can be done to adjust for this? Currently, I know people who 'archive' hardware just for the purpose of ensuring reproducibility and I'm wondering how this tranlates to the world of cloud and virtualization across multiple hardware types."

Comment Re:Education con game (Score 1) 95

Yeah but what about the existing debt? That has to be paid off before we can improve anything else.

Money and Debt is a (not so) simple zero sum game. Whenever a dollar is created, an equivalent debt/obligation is created. It always balances out to zero.

So who do you want to reduce their savings so that the US government can have less debt? Once you have decided on that, it is easy to discuss the actions the government should take to cause it to happen.

The Almighty Buck

Square Is Discontinuing Monthly Pricing On February 1, 2014 114

An anonymous reader writes "Mobile payment startup Square has decided to discontinue its monthly pricing option on February 1, 2014. The company says it does not plan to reinstate monthly pricing at any point. If you are currently enrolled in monthly pricing, Square will give you "a grace period" through the end of January 2014, after which the per-swipe rate will apply to transactions. On January 2, monthly pricing subscribers will be billed their last monthly fee, which will cover the rest of the month."
Software

Gate One Will Support X11: Fast Enough To Run VLC In Your Browser 164

Riskable writes "Ever seen a remote desktop tool that's fast/efficient enough to play back video? Gate One will soon have that capability via the forthcoming X11 support (as demonstrated in the video). I am posting this to Slashdot looking for suggestions and feedback as to how I should move forward with it before I solidify the architecture, API, and even the business end of it (making money). I'll be watching the thread and replying to comments (as I have time). Also, if you're interested you can sign up to be notified when it's available." We've posted a few stories about Gate One previously.
Privacy

Tesco To Use Face Detection Technology For In-Store Advertising 212

TinTops writes "Tesco has sparked privacy concerns following its decision to install technology that scans shoppers' faces in order to display video advertising on screens at its petrol stations. The UK's privacy watchdog the ICO is looking into the technology. This is the first national rollout of the system, known as OptimEyes, which claims to recognize facial characteristics that determine a customer's gender and age in order to show more relevant video adverts on screens as they queue at the till. Simon Sugar, chief executive of Amscreen, the firm which sells the technology, has admitted it has connotations of science fiction, but is looking to increase its reach further. 'Yes, it's like something out of Minority Report, but this could change the face of British retail and our plans are to expand the screens into as many supermarkets as possible,' he said."

Comment Re: Sales tax (Score 1) 167

Tax work best when the tax happens when the money moves.

Not really. Taxes works best when they target production directly at the source as it is being produced.

Targeting the sale means that you are targeting the wealth production way too late in the chain. In any sufficiently advanced society you end up with large amounts of wasted production capacity.

Bitcoin

FBI Seized 144,000 Bitcoins ($28.5 Million) From Silk Road Bust 162

SonicSpike writes "An FBI official notes that the bureau has located and seized a collection of 144,000 bitcoins, the largest seizure of that cryptocurrency ever, worth close to $28.5 million at current exchange rates. It believes that the stash belonged to Ross Ulbricht, the 29-year-old who allegedly created and managed the Silk Road, the popular anonymous drug-selling site that was taken offline by the Department of Justice after Ulbricht was arrested earlier this month and charged with engaging in a drug trafficking and money laundering conspiracy as well as computer hacking and attempted murder-for-hire. The FBI official wouldn't say how the agency had determined that the Bitcoin 'wallet' — a collection of Bitcoins at a single address in the Bitcoin network — belonged to Ulbricht, but it was sure they were his. 'This is his wallet,' said the FBI official. 'We seized this from DPR,' the official added, referring to the pseudonym 'the Dread Pirate Roberts,' which prosecutors say Ulbricht allegedly used while running the Silk Road."
Input Devices

Advances In Cinema Tech Overcoming a Strange Racial Divide 164

barlevg writes "Since the birth of film, shooting subjects of darker complexion has been a technical challenge: light meters, film emulsions, tone and color models, and the dynamic range of the film itself were all calibrated for light skin, resulting in dark skin appearing ashy and washed-out. Historically, filmmakers have used workarounds involving "a variety of gels, scrims and filters." But now we live in the age of digital filmmaking, and as film critic Ann Hornaday describes in the Washington Post, and as is showcased in recent films such as "12 Years a Slave," "Mother of George" and "Black Nativity," a collection of innovators have set to work developing techniques in lighting, shooting and post-processing designed to counteract century-old technological biases as old as the medium itself."
Social Networks

Researchers Show How Easy It Is To Manipulate Online Opinions 115

jcatcw writes "A recent study shows that a single random up-vote, randomly chosen, created a herding behavior in ratings that resulted in a 25% increase in the ratings but the negative manipulation had no effect. An intuitive explanation for this asymmetry is that we tend to go along with the positive opinions of others, but we tend to be skeptical of the negative opinions of others, and so we go in and correct what we think is an injustice. The third major result was that these effects varied by topic. So in business and society, culture, politics, we found substantial susceptibility to positive herding, whereas in general news, economics, IT, we found no such herding effects in the positive or negative direction."

Comment Re:Sharing not good for a debt-based economy (Score 1) 192

Money is supposed to represent a store of value earned by an economy's participants.

Only in the mind of people who understand neither the origin nor general use of money. Money has historically been used successfully for trade and taxing.

Meanwhile, all attempts at trying to turn money into a storage of value has has had dire consequences. The Euro simply being the latest in a bunch of total failures by people who are macro-economically illiterate.

Comment Re:Only one thing to do! (Score 1) 322

The second safest road is where everybody is moving at approximately the same speed with adequate spacing in between them.

Traffic death stats here in Sweden (from 2011) tells a far different story.

* 33% solo car
* 24% meeting cars
* 18% slow moving objects (animals/pedestrians/animals)
* 11% interesections/etc
* 9% other
* 3% cars moving in same direction under normal circumstances.

Government

For Overstated Claims, Gore, Tesla Upbraided By NWS, NHTSA Respectively 195

barlevg writes "In a recent interview, former Vice President and environmental activist Al Gore made a bold claim, that man-made global warming was causing hurricanes to be formed of such severity that 'they're adding a 6' to the hurricane scale, going on to say that 'The fingerprint of man-made global warming is all over these storms and extreme weather events.' In response, the National Weather Service has responded that they have no plans to add a 'doomsday Category 6' to their rating scale: 'No, we're not pursuing any such change. I'm also not sure who VP Gore means by "they,"' also noting that 'Category 5 has no ceiling: it includes hurricanes with top sustained winds of 157 mph and higher.' Furthermore, a recently leaked United Nations climate assessment claims only 'low confidence' of a link between human activity and increased hurricane severity and that this is likely due to increased human settlement in coastal areas and other regions vulnerable to natural disasters." Along similar lines, the National Highway Traffic Safety Administration says that Tesla's Model S, no matter how safe it is, doesn't get any special grade inflation: there's no "5.4" score (as the company did in a press release this week), because that's just not how the NHTSA keeps score. (Hat tip to reader cartechboy.)

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