Follow Slashdot blog updates by subscribing to our blog RSS feed

 



Forgot your password?
typodupeerror
Check out the new SourceForge HTML5 internet speed test! No Flash necessary and runs on all devices. ×

Comment Re:A real comparison? (Score 4, Informative) 286

The amount you save on gasoline, even over the full life of the car, will not pay for the premium price.

Not for current cars, but that's where the Model 3 is so exciting. $35000 is the median car price for new cars in the US, and that's where the Model 3 is intended to hit. There certainly was a premium for the Model S, but the premium is no longer there for the Model 3. Heck, if Chevy is going to try to sell the compact-sized Bolt for 35000, you could say that the Model 3 will be selling at a discount being as it's a bigger car with more features (like, say, a charging infrastructure).

By my calculation, I'll save about $1000 / year on energy costs over my Honda Civic. I normally keep cars for 10 years or so, so I'll be about $10,000 ahead at the end of my ownership - which is about the premium I'd pay over buying a new Civic. That's assuming that gas stays at it's current low price - let it climb back up to $4 or $5, and I'll be way ahead.

Comment Re:And in other news... (Score 5, Interesting) 180

Partly.

The "chlorine" smell in pools is from Chloramines - a compound made of chorine and amines (ammonia). You get more of it from urine, but it'll build up anyway from other sources. The Chloramines are also what stings and irritates the eyes, nose, and lungs.

How do you get rid of it? Raise the free chlorine level in the pool to 10 ppm or so (normal range is 1 - 3 ppm). Presto, changeo, the pool stops smelling like chlorine.

Cryptosporidium is a difficult to remove parasite that can exist in pool water. How do you treat pool water that's been contaminated with crypto? Raise the chlorine level to 10 ppm for 24 hours (20 ppm if you use stabilized chlorine).

Me? I just keep my pool between 10-20 ppm chlorine all the time. Crystal clear water, no algae, no eye irritation, no chlorine smell, no nasties in the water, no side effects at all. My kids swim in it eyes wide open for hours at a time, friends come over and say "I'm glad you don't use too much chlorine; I can't even smell it".

Comment Re:The perfect tablet is impossible. (Score 1) 231

The DRAM sticks in a PC have nothing to do with the SRAM in a tablet. The SRAM idle power consumption is almost purely leakage, and will be proportional to the number of gates - thus doubling capacity will double power consumption. Active power is unlikely to be significantly affected by doubling the memory, however.

As far as faster CPUs, even on the same process a CPU is synthesized for a target speed. If you want a slower CPU, the synthesis creates smaller (lower-power) transistors, and uses fewer buffers and/or synchronization stages. If you run a CPU synthesized to run at 2GHz at a 1 GHz clock rate, it'll take significantly more power than the same CPU, in the same process, synthesized to run at 1 GHz with a 1 GHz clock rate. At idle, the CPU synthesized for the higher clock rate will have higher leakage.

So, both of your statements are incorrect.

Comment Re:I don't (Score 2) 507

Good Lord! Elitist much?

Are you next going to tell me that I shouldn't listen to music encoded to MP3 because only the hearing impaired could possibly have an excuse for doing so? Going to tell me what lube I should use when I masturbate because everything else is beneath contempt?

I, of course, am typing this on my 1080p 32" LG Television that I use daily attached to my laptop. And I am neither color blind, nor do I have Retinitis Pigmentosa. This is the fourth TV I've used as a monitor, and the only issue I've noted over time is being able to disable the image enhancements that TV's love to include. The last three TV's I've used I've been able to successfully do so, so it may simply not be an important issue anymore.

Comment List by 20-somethings? (Score 5, Insightful) 397

As much as I admire the quality and intentions of the iPhone, I don't see it as being that important. People were texting, calling, and (gasp!) yes, even browsing the web before an iPhone ever showed up. The locked-in experience of the time was vastly inferior to what the iPhone brought to the game, which is of course the main reason that it did so well. But, without the iPhone, the smartphone market would still have developed, and people still would be carrying tiny but powerful little computers in their pockets.

Comment Re:Fingerprinting is new? (Score 1) 224

Matsumoto's paper has been on my hard drive for five years now. You seem to be under the mistaken impression that "all fingerprint sensors are the same".

I've built fingerprint spoofs from gelatin, graphite coated gelatin, wood glue, laser printers, silicone rubber, etc. I've collected latent prints for this work, as well as cooperative prints ("Is it OK if I pour this liquid silicone over your finger to collect your print?") I've done statistically significant measurements of the likelihood of success of breaking into systems with those spoofs. I can truthfully say that I know a great deal more about this than you.

I've given a specific set of hardware, and a specific incentive, for you to back up your claims. Note that I don't claim that ALL fingerprint sensors are difficult to break into - I could give you a list of the easiest ones. In that regard, you are correct. However, there are some manufacturers (of both fingerprint sensors and laptops) who do care about security, and shouldn't be painted with the same sloppy brush.

Comment Re:Fingerprinting is new? (Score 1) 224

Really?

So, I issue a personal challenge. I will pay you $500, in cash, if you build me a fingerprint spoof made from a latent print that will break into a 2013-2015 HP Enterprise laptop. As part of the deal, I will require that you log the hours you spent, the money you spent, and all the attempts you made, to fulfill this requirement.

If your knowledge of this area is gained from Mythbusters, you are sadly behind the curve. I will admit, however, that the fact that I have to call out a specific class of machines from a specific manufacturer to issue a challenge is a sad statement on the state of affairs of fingerprint anti-spoof technology.

Let me know if you wish to take me up on this offer.

Comment No problem here... (Score 2) 224

They got a warrant. None of my other "persons, houses, papers, and effects" are secure against a warrant, so why should my phone be?

You may not think that there are other situations where the State could require my cooperation to investigate my alleged crimes, and yet those situations exist commonly. Fingerprints or DNA, for example, are coerced confessions from my body to be used by the state against me - and there's a long history (sometimes sordid) of their acceptance and use. They are coerced cooperation - try not giving fingerprints or DNA and see how far you get.

The only significant issue I see is that the coerced cooperation required to open my phone, opens a huge window into my private business that doesn't have much of a parallel pre-cellphone. But that isn't much different than a search warrant for my house - the warrant must be specific, but that doesn't mean that the police who search my house won't investigate every document, container, and closet that may (or may not) be covered by the warrant.

Slashdot Top Deals

Never appeal to a man's "better nature." He may not have one. Invoking his self-interest gives you more leverage. -- Lazarus Long

Working...