Want to read Slashdot from your mobile device? Point it at m.slashdot.org and keep reading!


Forgot your password?
Compare cell phone plans using Wirefly's innovative plan comparison tool ×

Comment Re:Stealth (Score 3, Interesting) 117

An expensive plane with a "meat-sack" does not only have to be built strong, it has to be built to last. This results in larger development times and costs. One big advantage to an autonomous fighters that is rarely mentioned is that it does not have to last long. The aircraft can be designed to last 100 flights, not 10,000. This is because the planes would sit silent until needed. With piloted fighters, the pilots need regular training and practice using the same planes with which they will be fighting. With autonomous fighters the planes would almost never fly. Regular duties such as patrol could be taken over by simpler planes with lower maintenance costs where the full capabilities of a modern fighter are not required.

Comment Re:Driving yes, but charging?' (Score 2) 990

Hydrogen and electric are the only two vehicle choices that are carbon free. The oil/gas industry does not care which wins, they will supply the energy either way. It is the local governments that care because road infrastructure is largely paid for by fuel taxes. With hydrogen they do not have to change anything because they can tax hydrogen. Everyone going electric will require significant changes to how infrastructure is paid for.

Comment Re:Wikileaks: Propaganda arm of Russian intelligen (Score 1) 231

When Wikileaks publishes some stolen documents it is generally just for the purpose of being open. When Wikileaks times the publishing of certain documents to effect the democratic process, they are playing politics.

In addition, if Wikileaks publishes documents that have been filtered by a third party that wishes to effect the democratic process, Wikileaks is straddling the boarder of playing politics. Such posts need to be identified so the reader can take this into consideration. Otherwise Wikileaks is lying by omission - and as a result, playing politics.

I love an impartial Wikileaks. But a Wikileaks that plays with politics is utterly useless.

Comment Re:I'm shopping for a phone now (Score 1) 536

If connecting to a home stereo you could use an adapter / dongle. Better yet, a cable with the correct ports on each end. I assume you leave your cable connected to your home stereo. Be it a 1.8" cable or a USB-C cable, it does not make much of a difference when you are not carrying it around with you.

Comment Re:Renewables vs baseload (Score 1) 269

Used automotive batteries. Once they have been depleted to ~80% of their original capacity they are replaced. The old batteries can be recycled or reused in applications where weight and size are not as important as when used in automobiles. Storing excessing solar power appears to be an ideal application. One can only assume that this is why Tesla is getting into the home battery business. But Tesla does not make many cars. Once the big auto makers start releasing more electric vehicles there will be plenty of used automotive batteries available for storing renewable energy.

Comment Re:a selling point? (Score 1) 221

But that is due to power concerns. USH-II and UFS will both have the same problem because they both have the same form factor and basic signaling standards.. It will be a while before the benefits of a new bus can be realized when working with uSD sized cards. I assume most people will value power efficiency over speed so I would not expect this to make a difference any time soon. But if Intel's new memory works as advertised it might change things.

Comment Re:Take the PCIe logo off the box (Score 1) 157

That is not what I read. Sounds like PCIe power is reduced with the new diver. In addition, an option was added to further reduce total power consumption. This option is "separate" to the PCIe power issue.

In this driver we've implemented a change to address power distribution on the Radeon RX 480 -- this change will lower current drawn from the PCIe bus. Separately, we've also included an option to reduce total power with minimal performance impact.

So they were working on the drivers and decided to add a feature. This feature is off by default but could be useful for those with limited cooling in their cases. However, the PCIe power issue is fixed in all cases.

Comment Re:Parallelization... (Score 3, Informative) 55

Branch prediction integrated with the pipeline. Most CPUs do not execute both branches so much as they perform all the work required to quickly switch to the alternate branch should a branch not go as predicted. This implies an alternate pipeline into which the instructions for the alternate branch are queued. This might not sound like much but it actually constitutes >90% of the work a CPU must perform. The ALU is fast and simple but getting the correct data to and from the ALU is challenging.

CPUs can also support multiple ALUs - but this is not to speed branches. Multiple ALUs are used when the CPU detects that incoming instructions are not dependent on one another and can be executed concurrently. When detected, instructions are executed in parallel. The benefits gained are limited and it comes at the cost of extra transistors. However, because you have less movement of data, power requirements are reduced.

Look at the Apple A9 CPU compared to alternate multi-core ARM chips that are available. The A9 is just as fast while running fewer cores at lower clock rate while consuming less power. It is able to do so by using the previously mentioned techniques. It uses billions of transistors and costs more to produce then other chips that are just as fast. Not a good choice for making devices with low profit margins, but an excellent choice if you can afford it.

Comment Re:Boring (Score 1) 205

While I agree this is more flash then substance, it hardly deviates from the laws of physics. Unlike the nVidia example you provided, this CPU does not have much in the way of IO bandwidth. So we are talking about minimal movement of data which in turn results in impressively low power consumption. For certain applications this could be great (a previous post mentions neural networks). For the other 99% it is worthless.

One should not compare this CPU to a GPU because the underlying design goals are very different. It is possible that certain tasks would be much better serviced by this CPU. Designing appropriate algorithms will take some time so I suppose we will have to wait to see if it is actually useful.

Comment Re:Not Invented Here Syndrome? (Score 1) 295

I would assume the reasons were more technical. Apple was fully capable of working out a deal if they thought it would be of value. The problem with ZFS is that it consumes more hardware resources. This is fine for a server because with additional hardware it performs quite well. People buying a server generally do not care about a couple gigs of RAM. But considering that Apple was selling laptops outfitted with 512MB - it was not a good fit. Any filesystem supported by Apple would also have to operate well over USB. If FreeBSD support for ZFS over USB is any indication, it is a bad idea (as I experienced with FreeNAS.)

If there were no legal problems then it is possible Apple would have continued to integrate ZFS with the plan of eventually switching over. But regardless of the legal problems, that switch would not have occurred right away. Looks like Apple supported ZFS just long enough to come to the conclusion that it was not a good fit.

I love ZFS on my fileserver. I am tempted to run ZFS on my workstation. But for the majority of computers Apple sells today, it would cause users more pain then it should.

Comment Re:Really? (Score 1) 596

How the sensor got that reading could still be manufacturing fault, cable fatigue, or a million and one other things not the fault of the driver.

Designing a pedal sensor that errors to 0% is expected. So when one of those million things goes wrong you do not get the 100% acceleration experienced in this situation. A far more likely scenario is that something dropped onto the acceleration petal. Alternatively, when in a state of shock, the driver mistook the acceleration petal for the brake.

Slashdot Top Deals

"Truth never comes into the world but like a bastard, to the ignominy of him that brought her birth." -- Milton