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United Kingdom

London Terrorist Used WhatsApp, UK Calls For Backdoors (yahoo.com) 160

Wednesday 52-year-old Khalid Masood "drove a rented SUV into pedestrians on Westminster Bridge before smashing it into Parliament's gates and rushing onto the grounds, where he fatally stabbed a policeman and was shot by other officers," writes the Associated Press. An anonymous reader quotes their new report: Westminster Bridge attacker Khalid Masood sent a WhatsApp message that cannot be accessed because it was encrypted by the popular messaging service, a top British security official said Sunday. British press reports suggest Masood used the messaging service owned by Facebook just minutes before the Wednesday rampage that left three pedestrians and one police officer dead and dozens more wounded.... Home Secretary Amber Rudd used appearances on BBC and Sky News to urge WhatsApp and other encrypted services to make their platforms accessible to intelligence services and police trying to carrying out lawful eavesdropping. "We need to make sure that organizations like WhatsApp -- and there are plenty of others like that -- don't provide a secret place for terrorists to communicate with each other," she said...

Rudd also urged technology companies to do a better job at preventing the publication of material that promotes extremism. She plans to meet with firms Thursday about setting up an industry board that would take steps to make the web less useful to extremists.

Comment Re:A way better solution (Score 1) 254

Really?

In the UK, red means DO NOT CROSS the line of the traffic light. If you're already past the line by the time it goes red, you're on your own (e.g. traffic jam in front but no yellow box forcing you to keep the junction clear and nothing moves for a whole phase) but it's not an offence.

The problem is the latter. The cameras check if you are in the intersection on red, so if you cross on yellow, and don't get out (easy if the yellow is too short).

Btw, you are not supposed to enter the intersection unless you can pass all the way through, if you end up being stuck due to a traffic jam you are also breaking the law.

Comment Re:Maybe they shouldn't use Javascript ... (Score 1) 228

Why the hell would anything be in the CPU's memory when you're rendering the screen? All of this should be happening on the GPU, without any bitting of things from CPU memory.

Because that is how most 2D rendering works and how Chrome works (which this product uses). It is rendered with CPU based rasterization to tiles which are uploaded to the GPU and then composited by the GPU.Unless the you disable GPU compositing, then there is also a CPU based fallback.

Note, my base assumption is still that they are doing it wrong and stupidly. Rerendering the entire screen on CPU 60fps. That would fit with 12% CPU. A smart CPU rerendering would only rerender the pixels changing (which is easy on CPU based algorithms because there is no double buffering) and use 0.1% CPU, a smart GPU based rerendering would rerender the entire screen but still use less than 0.1% CPU because only GPU instructions would be issued.

Comment Re:Maybe they shouldn't use Javascript ... (Score 1) 228

Why the hell would anything be in the CPU's memory when you're rendering the screen? All of this should be happening on the GPU, without any bitting of things from CPU memory.

Because that is how most 2D rendering works and how Chrome works (which this product uses). It is rendered with CPU based rasterization to tiles which are uploaded to the GPU and then composited by the GPU.Unless the you disable GPU compositing, then there is also a CPU based fallback.

Comment Re:Maybe they shouldn't use Javascript ... (Score 1) 228

No, as the C/C++ programmer, 0.13% of the CPU should be enough to render the entire screen at 60fps.

Depends on the screen resolution and speed of your memory. 13% of "CPU" doesn't sound too far off, though almost all of that time would be waiting on memory. Let's say you can blit 1080p in about 2ms (first in CPU memory and then to GPU memory), that would be 120ms per second for 60FPS or 12%

Comment Re:A way better solution (Score 1) 254

Why not just use the orange light and red light as intended? Orange means stop unless you need to break hard, and early red means get out of the intersection if you are still there. This idiocy about automatic tickets on red is the entire problem. It is like they don't understand hard traffic lights are supposed to work.

Comment Re:3500 degrees (Score 1) 123

Because when you mix 2 things at temperature T, it doesn't make a thing at temperature 2T. Don't mistake temperature for energy.

Wait, wait, wait.. Are you guys thinking about is a physical connected heat transfer? Then yes, adding two sources at 1000C will not get the temperature above 1000C (you need an active heat source and insolution for that). But this isn't a physical heat transfer. It is an energy transfer over light, and this case the new matterial unconnected to the old can have different material and different insulation. Using physical connected heat logic makes no sense here.

Comment Re:3500 degrees (Score 1) 123

Because when you mix 2 things at temperature T, it doesn't make a thing at temperature 2T. Don't mistake temperature for energy.

?? What are you smoking?

Of course it isn't. But if you add two accelerations to eachother you get twice the acceleration. The stable temperature is based on where the acceleration and deacceleration of temperature meet (how much is added and how much is lost). When you add more, that balance changes upwards.

Comment Re:3500 degrees (Score 1) 123

I had the same question. It seems to me that the only limiting factors would be total power (shouldn't it scale linearly with the number of bulbs?) vs. the rate at which heat is removed from the target location via thermal radiation or convection.

I suppose you'd also have to consider what happens when your target vaporizes, since you'd no longer have a solid object at the focal point to absorb the radiation.

That is also the only way a relation to the filament material would make sense. If the target is made of the exact same material, it would vaporize at the maximum temperature of the filament. But why would it be the same material?

Comment Re:Nope (Score 3, Informative) 123

optimal setup for concentrating natural sunlight

But it's not. Sunlight is for all intents and purposes collimated due to the extreme distance of its source. While these lamps can be "swivelled (sp?) to concentrate light on a single spot", that will tell you little about the setup applicable for use with sunlight.

Have you heard about mirrors? And mirrors on swivels?

See also Solar power towers

Comment Re:3500 degrees (Score 1) 123

That's a lot really. What kind of lights are these?

The summary obfuscates this but whatever the amount of incandescent bulbs you are focusing on the same spot, you cannot get a temperature that is higher than the filament in the bulb (the black box temperature of the bulb). And 3500 is a lot for an incandescent bulb.
Maybe it's another kind of lighting then. Like a combination of different LEDs.

Okay. I will bite: Why not? You add energy from multiple lamps. Light superpositions and photons excites what they hit if they are absorbed, because they can't really do anything else. The maximum possible temperature at the focal point, shouldn't have anything to do with the original material.

Submission + - SPAM: Quicken Bill Pay is No Longer Safe to Use 1

Bruce Perens writes: I don't usually make security calls, but when a company makes egregious and really clueless security mistakes, it's often the case that the only way to attract their attention and get the issue fixed is to publicize it. This one is with Quicken Bill Pay, a product of Metavante (not Intuit). It's from personal observation rather than an expert witness case, and the company has been unresponsive through their customer support channel.
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