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Comment: Re:Lemme posit this... (Score 3, Insightful) 100

by EmperorArthur (#46540633) Attached to: College Grads Create Fake Tesla Commercial That Elon Musk Loves

So, ten years after the fact, you still remember the name "Joe Myers Ford"? Sounds like those ads succeeded in creating brand awareness.

Yes, but that's only a good thing if you subscribe to the notion of "all publicity is good publicity." In many cases the ad can do the opposite of what you want. Ex. People who remember Dr Pepper because "not for women."

Comment: Re:im no linux expert by any stretch (Score 1) 46

by EmperorArthur (#46537047) Attached to: Debian Considering Long Term Support for Squeeze

I was sitting on Kubuntu for years before I jumped to Debian Testing with KDE. Those upgrades were anything but painless. Circular dependencies, broken audio, etc... Basically it was hell. Debian is much better.

As a bonus with Ubuntu deciding to switch to systemd with Debian there isn't really much of a difference between Kubuntu and Debian KDE Testing.

Comment: Re:In their defence. (Score 1) 417

by EmperorArthur (#46441695) Attached to: School Tricks Pupils Into Installing a Root CA

That's the joy of HTTP based stenography. You can firewall everything but port 80 and it still isn't enough.

Even if your using an ip ban hammer you're still playing whack a mole.

You can always use a honey pot and just ban people from the network, but then you'll get more stories like this one. Unless you like your workplace to be known as a penal institution that's not a good thing.

Comment: Re:Exploit, or dumb users? (Score 4, Interesting) 105

by EmperorArthur (#46394243) Attached to: New Attack Hijacks DNS Traffic From 300,000 Routers

And just how are these 300,000+ routers being reprogrammed to use alternate malicious DNS settings? Is this conducted via some common firmware exploit, or dumb users leaving default admin password in place?

Either is quite possible, though default password issues require that a PC on the LAN already be infected.

Newer routers, especially the router/modem combo units, seem to have a randomly generated password that's printed on the device label. They also tend to come with WPA2 turned on with another randomly generated password that's also on the label. Proof that you can make devices more secure by default.

Comment: Re:Electric Bikes are Illegal in NYC. Kickstopped. (Score 1) 166

by EmperorArthur (#46385857) Attached to: Invention Makes Citibikes Electric

So I take it that segways are also banned in NY then?

If that's the law, then yes they are. Just because police ignore a law or even choose to break it doesn't make it any less illegal for you or I to break the law. They could even use this as an excuse to jail someone they don't like even while they're riding around on their own Segways. This is why people think that selective enforcement is basically handing police a ridiculous amount of power.

Comment: Re:D'oh (Score 1) 120

by EmperorArthur (#46301943) Attached to: Drive-by Android Malware Exploits Unpatchable Vulnerability

I thought GMS was introduced to address this issue (among other reasons) so that any bugs in new features could be fixed by sending out a GMS update, of course that doesn't solve the issue of not being able to push fixes for AOSP bugs directly to handsets.

That's the marketing pitch, but the reality is really much more sinister. The true goal is to replace AOSP with proprietary Google components.

http://arstechnica.com/gadgets...

Comment: Re:Umm safety? (Score 1) 305

by EmperorArthur (#46301891) Attached to: Why Your Phone Gets OTA Updates But Your Car Doesn't

This seems easy to fix. Most (all?) states have some sort of annual safety inspection requirement for keeping a car on the road.

Nope, most states say it's too much of a pain, and don't do any of that. In most of the US, if the car runs and you don't get pulled over it's good to go.

https://en.wikipedia.org/wiki/...

Comment: Re: Use Cisco instead... (Score 4, Informative) 76

by EmperorArthur (#46254169) Attached to: S. Korea Diverts Network From Huawei Networks

Huawei firmware is not known for its quality. It has so many nasty bugs and security holes, the remote firmware programming interface is just a safer way to do it.

Cisco and Juniper are much better (at least their boxes crash or do idiotic things a lot less than Huawei boxes), but still not anywhere close to safe enough for the job, as one can easily check by hunting for C and J firmware exploits in several sites.

I always point to this video when people ask what my big deal with Huawei is. The takeaway, they found early 1990s bugs and security everywhere, including all memory being world accessible and mapped read, write, execute. That means you just need an exploit, no privilege escalation necessary. Also, not only are these exploits easy to find, Huawei doesn't publish CVEs or changelogs for their new firmware. Combine that with most debugging features only being available in Chinese.... Yeah, I'll pass.

http://www.youtube.com/watch?v...

Comment: Re:Reflectivity map... (Score 1) 134

by EmperorArthur (#46247373) Attached to: Game Developers' Quest To Cross the Uncanny Valley

First Google result for Specular Map: "Specular maps are the maps you use to define a surface's shininess and highlight colour." Basically, every video game already does this. http://wiki.splashdamage.com/i...

One of the best videos I've seen showing some of the problems was the original Nvidia Ira tech demo. They mention things like how skin doesn't just reflect light off the surface, but absorbs and defracts it. http://www.youtube.com/watch?v...

Comment: Re:Whats wrong with init? (Score 5, Interesting) 279

by EmperorArthur (#46247251) Attached to: Ubuntu To Switch To systemd

Lets face it, sysV init is complicated. Well, the theory behind the old linear start from init script 00 and move to init script 99 isn't, but the modern implementations and the scripts themselves are complicated. I mean you're doing dependency checking and a whole bunch of other things in bash scripts. Compare that to a systemd service file, which is overall nice and readable. So, part of it is factoring out the logic from the variables. The other big thing is bash and the tools used by init scripts are like using a sledgehammer to tap in a finishing nail.

I'm not going to say that systemd is perfect. I like the "unix" way which is to use small units that do one thing well instead of anything. That's part of the reason I see bash init scripts as too much for the job. Unfortunately, the systemd authors look like they want to throw in everything but the kitchen sink. Well, everything that they can't just port to kernel space that is. But that's the thing, Linux is a Monolithic kernel. Like it or not, the "Linux" way is to have one uber optimized thing with modules to handle everything.

In the end, I just really like the ease of use of service files. Oh, and the stupidly fast boot time on my laptop is really nice. People who say boot times don't matter aren't living in the real world.

Comment: Re:photons are photons (Score 1) 40

by EmperorArthur (#46238227) Attached to: Researchers Unveil High-Speed Laser Communications Device For Space

Nope, nothing new to the Telcos or pretty much anyone who had to take a Signals course. The Nyquist rate has been known singe Harry Nyquist published it in 1928. The trick is that it sets a maximum number of symbols as twice the bandwidth. If you're only using one symbol (a '1' or '0') then the baud (symbol) rate is equal to the bit rate. If you're using more symbols like in modern systems (eg. 64QAM) then the baud rate doesn't change, but the bit rate (in Mbps) goes up exponentially.

Combining multiple transceivers which each use the same bandwidth but with different frequencies is also very common. It's a form of multiplexing, and is how many cell phones and cable modems can share the same wire without reducing throughput.

https://en.wikipedia.org/wiki/...
https://en.wikipedia.org/wiki/...

Comment: Re:photons are photons (Score 1) 40

by EmperorArthur (#46237993) Attached to: Researchers Unveil High-Speed Laser Communications Device For Space

I'm only familiar with nyquist when it comes to audio phenomina... but if you're using more than half the bandwidth won't you have to deal with artifacting (aliasing in the audio world)?

Nope. The Nyquist-Shannon theorem deals with sampling rate. It says you have to be sampling at least twice as fast as the highest frequency if you want to perfectly decode the signal. The Nyquist rate deals with the maximum amount of data that can be transmitted. It says the absolute maximum symbol rate is equal to twice the bandwidth.

It's an easy mistake to make because the first is often called the "Nyquist sampling theorem," and they both deal closely with the same concepts. The wiki page I originally linked to was the Shannon–Hartley theorem, which is an adaptation to the Nyquist rate to account for noise reducing the theoretical maximum. It also explains Nyquist rate better than the actual Nyquist Rate wiki page. :/

https://en.wikipedia.org/wiki/...
https://en.wikipedia.org/wiki/...
https://en.wikipedia.org/wiki/...

Comment: Re:photons are photons (Score 4, Informative) 40

by EmperorArthur (#46236193) Attached to: Researchers Unveil High-Speed Laser Communications Device For Space

Yes. The energy that gets you one single green photon gets you 75000 radio photons at the Cassini probe's X-band comm frequencies, for example. Having 75000 times more quanta means your system can be built on well-known classical principles (i.e. standard microwave radios) and work as expected.

But can one green photon hold more information than an RF photon?

The trick is when you're talking about bandwidth. "A key characteristic of bandwidth is that any band of a given width can carry the same amount of information, regardless of where that band is located in the frequency spectrum." Visible light is approximately "430–790 THz." While X-Band is "8.0 to 12.0 GHz" So you're talking about hundreds of THz vs 4 GHz.

Nyquist says the absolute maximum symbol rate is equal to twice the bandwidth. This means that once you've hit that cap, the only way to send more data is to either increase the number of bits per symbol or increase the frequency. Increasing the symbol rate can end up taking expensive delicate equipment, so it's easier to just throw a second transceiver at the problem. The second one would be exactly like the first, but would be operating at a slightly different frequency. The spectrum for light is a much larger playground for this than X-Band is.

https://en.wikipedia.org/wiki/...
https://en.wikipedia.org/wiki/...
https://en.wikipedia.org/wiki/...
https://en.wikipedia.org/wiki/...
https://en.wikipedia.org/wiki/...

Comment: Re:Something doesn't make sense, at least for the (Score 1) 118

by EmperorArthur (#46235647) Attached to: Google Earth's New Satellites

Am I the only person who considers it interesting that DigitalGlobe is prevented from selling high resolution images by the US while state governments are practically giving away even higher resolution images. This kind of crap is why conspiracy theories are so common. Though, my bets on good old government incompetence.

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