Please create an account to participate in the Slashdot moderation system


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

Comment Re:Credit card chargeback. (Score 1) 86

Sounds like how we ended up canceling our news paper subscription a couple of months ago. I wonder if most people just don't know about chargebacks so companies think they can just fuck over people and get away with it most of the time or if they just assume most people will just take it. Because of the ability to issue a chargeback and other protections I try to run everything I can through my credit card. It gets paid off in full, current outstanding balance not just previous statement balance, each month so it isn't like it costs me anything to use it.

Comment Re:It's about landmass (Score 3, Interesting) 396

Use cases like yours and mine where I have a lake property 2.25 hours away where I have to tow stuff to and there isn't electricity on site are not something EVs can meet now in the future maybe but then we are a limited few. That said you have people like my wife who 90% of the time drives 5 miles a day and the rest of the time drives at most 60 miles a day can get by with an EV without issue. My mother, step dad, step mom, sister, mother-in-law, and father-in-law could have their entire driving needs met by just about any EV available now (maybe not the volt without it going to gas mode). So in my immediate family only myself, my father, and my brother-in-law who can't meet all our vehicle needs with an EV. Even then my father would only need a non EV to tow his race car to tracks as he doesn't have a long commute and everything he needs is close by otherwise. So that leaves myself with my 64 mile daily commute plus what ever else I have do that day, and my brother-in-law who fixes commercial restaurant equipment and drives from job to job in a big ass van all day.

Comment Re:Thanks, Obama! (Score 1) 205

The Mona Lisa and the Venus de Milo were really the only spots where there really was a shit ton of people so while I walked by them and "saw" them it was hard to appreciate them because of the number of people. My favorite painting in the Louvre is The Virgin of the Rocks and like most of the other paintings and art all that there is the velvet rope to keep people away. The thought of how much trouble I would I get in if I touched it did cross my mind. If one really wanted to get away from people there is always the early christian section. The Louvre is a wonderful museum to go to but if all you want to do is see the Mona Lisa or Venus de Milo don't bother. It is truly huge so even if there are a lot of people they are spread out there. I took 2 days open to close to check things out and those were hot humid days as the Louvre has air conditioning unlike a lot of buildings in Paris. I lived there at the time so I could afford to take my time at places. Also I highly recommend seeing the Bastille Day parade down the Champs-Élysées and then fireworks at Champ de Mars. If you are into military history I would highly recommend going to Hôtel des Invalides. Instead if one wants to nerd out there is always Musée des Arts et Métiers.

Comment Re:Conservatives need to realize cheating occurs (Score 1) 125

I don't believe the neighbors up at my lake place have AC but then in the summer when it gets oppressive hot and humid (I've been up there when the dew point was in the upper 70s and 80s) the thing to do is go out into the lake and sit in an innertube over the nice cool spring that feeds the lake and just fish and/or drink. There is a nice breeze that comes off the lake most of the time that goes right into our properties as well. A good wood stove + fan can and does provide a lot of heat. As I will be using my property as a recreational one I won't need AC but a couple of ceiling fans, lights, fridge, microwave, hotplate, toaster oven for the electrical things. I would plan on having a nice wood stove for heat up there since that would just make sense given the fuel is free up there.

Comment Re:Encryption (Score 2) 205

While quantum computers screw over RSA and other asymmetric key crypto systems based off of the integer factorization problem, the discrete logarithm problem or the elliptic-curve discrete logarithm problem, they just substantially speed up symmetric key. The speed up of symmetric key crypto systems is substantial but all you need is to double the key length. So a 512 bit key in a real quantum computer world would be as strong as a 256 bit key in our current classical computer world. Also the reason all of the AES competitors had 256bit keys is because NIST had the good sense to think that quantum computers would become viable within the lifetime of the AES standard and wanted something that still provided the same security as 128 bit keys in a classical computer world. By the way it would take a sizeable portion of the total US annual consumption to just cycle through a 128 bit key on an ideal computer, so we are already at a hand waving level of silly at that level.

If you mean asymmetric key systems there are replacements but I am not familiar with the math behind them so I can't really comment intelligently on them.

Comment Re:Encryption (Score 2) 205

Unless they have a machine that is made of something other than matter and occupy something other than space I'm not too worried about them cracking modern 256 bit symmetric key encryption. Even on an ideal quantum computer using Grover's Algorithm they would still need to use a sizeable fraction of the US's total annual energy consumption. This however is on ideal computers running at the temperature of the cosmic background radiation temperature so in reality they would require several orders of magnitude more energy. To put things in perspective here is Bruce Schneier's comments on the hard limits of breaking a symmetric key encryption:

One of the consequences of the second law of thermodynamics is that a certain amount of energy is necessary to represent information. To record a single bit by changing the state of a system requires an amount of energy no less than kT, where T is the absolute temperature of the system and k is the Boltzman constant. (Stick with me; the physics lesson is almost over.)

Given that k = 1.38×10^-16 erg/Kelvin, and that the ambient temperature of the universe is 3.2Kelvin, an ideal computer running at 3.2K would consume 4.4×10^-16 ergs every time it set or cleared a bit. To run a computer any colder than the cosmic background radiation would require extra energy to run a heat pump.

Now, the annual energy output of our sun is about 1.21×10^41 ergs. This is enough to power about 2.7×10^56 single bit changes on our ideal computer; enough state changes to put a 187-bit counter through all its values. If we built a Dyson sphere around the sun and captured all its energy for 32 years, without any loss, we could power a computer to count up to 2^192. Of course, it wouldn't have the energy left over to perform any useful calculations with this counter.

But that's just one star, and a measly one at that. A typical supernova releases something like 10^51 ergs. (About a hundred times as much energy would be released in the form of neutrinos, but let them go for now.) If all of this energy could be channeled into a single orgy of computation, a 219-bit counter could be cycled through all of its states.

These numbers have nothing to do with the technology of the devices; they are the maximums that thermodynamics will allow. And they strongly imply that brute-force attacks against 256-bit keys will be infeasible until computers are built from something other than matter and occupy something other than space.

So go and see what the best break for a modern symmetric crypto system is and see where it falls on the above description.

Comment Re:Thanks, Obama! (Score 1) 205

Lots of people say and feel like this, and yet, tourism at the Louvre was still down 15% in 2016

Sounds like a godsend to me. It is great that the Louvre gets a lot of visitors but the times I was there it was always packed around the popular stuff so you couldn't get close to have a good look.

Comment Re:Conservatives need to realize cheating occurs (Score 1) 125

We won't have any of that talk around here. Everyone know if you are a farmer or rancher you need a F350 crew cab long box with dualies, 33" mudding tires, dual stacks, and a set of truck nuts.

All silliness aside those remote areas are were renewables are a really good idea and providing you can get the needed range it seems like an EV would be a good fit. I have a lake property up in northern Minnesota that I will be putting up a cabin on at some point and have looked into the cost for getting electricity as the nearest power is over 1/2 mile away. So my options would be to pay for a run and transformer to be connected to the grid, get a cheap but noisy generator, get a quiet but expensive generator, or go with renewables and batteries. The cheapest option would be to get a noisy little generator and pay for fuel but I go up there to get away from things so who wants to a generator. The other options are all fairly cost competitive for my needs when one takes into account all of the costs right now. I'm leaning towards renewables with .5-1KW installed solar capacity with .7-1.4KW installed capacity of wind with a bank of nickle-iron batteries. The neighbors up there have a wind+solar+battery setup on their 4200sq.ft. house so they are off grid and they heat mostly with wood but do LP is used as s supplement and for the stove and water heater.

Comment Re:Conservatives need to realize cheating occurs (Score 1) 125

Come on now some of those reciprocating piston ICE are really efficient. Granted you wouldn't put it in a passenger vehicle, but things like 400 ton trucks, trains, and ships use those same high efficiency engines that they use in power plants that are getting close to 60% efficiency. A combine cycle heat+power natural gas turbine gets to 70% but that is only if there is a use for the waste heat otherwise they are only 50% efficient.

Comment Re:Analogue revival (Score 4, Insightful) 562

I have heard some of the non audiophile arguments for vinyl being popular, usually it is a collector piece with added inserts, special add-ons and larger better cover art. For photos some people just like film and film photography is something that people do because it is film, just like people still paint scenery even though photography does a better job of capturing it accurately. It is now basically art and carries its own unique characteristics that digital doesn't have it will likely be able to keep on like that forever. I still don't see a reason for there to be an uptick in cassette tape as there was nothing redeeming about it when it was new other than it was portable.

Slashdot Top Deals

A language that doesn't affect the way you think about programming is not worth knowing.