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Comment: Re:Amazon Web Services? (Score 1) 349

by arete (#40517821) Attached to: Ask Slashdot: VPN Service For a Deployed US Navy Ship?

I see two basic ways to do this, not just one.

Big Tunnel: A tunnel to somewhere. This requires, as you note, a machine acting as a multiplexer somewhere.

Microtunnels. Many client machines using VPN tunnel software. This does not require that close machine, but DOES require installing VPN on many clients.

Microtunnels are possible, and definitely recommend a vendor who does that. You're basically just getting a package deal on 2345235 little VPN accounts.

The Big Tunnel could just be 3 lines of ssh and cron, but you do need a box on your side and a remote box.

Comment: You're all going to hate me for saying ColdFusion (Score 1) 409

by arete (#40204823) Attached to: Ask Slashdot: Tips For Designing a Modern Web Application?

It seems to me that what the OP really should use is a mature framework e.g. Drupal rather than rolling your own regardless of language choice.

BUT since this thread has evolved into a language choice I'm going to respond to that. I'm also going to come right out and say that this post will be very unpopular on Slashdot. [Hopefully I won't get sunk by too many mods saying -1 "opposite of my fanaticism." ] ColdFusion has a pretty narrow applicability, but it's ideal for the OP.

Con: ColdFusion per se is not free in source or beer. (allthough there are ports) BUT shared hosting is only infinitesimally more expensive, so this is an issue only if you'relocked into a certain host or you are goign to have aan armada of servers. [The local dev version IS free.]

Con: ColdFusion is not very popular. There's still a LOT more usage than most people seem to perceive, but it's obviously not up there with e.g. PHP. [Commercially ColdFusion missed its window. In ~1998 database driven web applications were relatively novel and it was awesome. In 2001 it was comparatively unstable at higher traffic values. In 2002 they threw out the underlying server product and now it's an interpreter plugin that runs on any J2EE server you want it to.]

Pro: CF is a mature, modern flexible, powerful, rapid development toolchain for making websites. Especially as a novice in web apps it's going to support you. It'll let you worry about your app and not the minutia and has automatic capabilities for all sorts of things. It does the right thing by default but lets you override if it you need to. [Aside: These advantages are rather similar to what's advertised for RoR which IS free... If anyone can tell me some awesome thing RoR does for a website that CF doesn't beyond the two "cons" I've listed above I'd really like to know -- so far no one has been able to give me a good one. I'm excluding outdated concerns e.g. that the 1999 version of CF wasn't OOP.]

Pro: CFML is a pretty ideal language for generating HTML because as a markup language the flow of your HTML remains obvious and readable. [PHP eventually adopted the ability to use a similar paradigm.]

I've heard some people say that CF is what Java Server Pages should've been.

Pro: CF IS Java. (server) You're running on a Java server and the things you already know about running that remain true.

Pro: CF IS Java. (language) Even moreso, you can literally inline Java code into CF code (much like old school ASM into C). In my time writing CF I've done this literally twice:

a. to use Java's sleep() [Note: I do not recommend using "sleep" when generating a webpage, but it was an exceptional circumstance.]

b. to use Java's image manipulation libraries from CF templates.

I'm not saying CF is ideal for all circumstances. Merely being non-free rules it out of a lot! But it really is -- at least in my opinion -- "how to build a web app on a Java server" and that has a lot of suitability as a platform for the OP.

Comment: out of your box solutions including OS X (Score 3, Insightful) 249

by arete (#31642752) Attached to: Rugged Laptop/Tablet Suggestions, 2010 Version?

I realize you asked for a ruggedized laptop. However, that everyone else replaces theirs regularly points to the idea that you should consider that as a serious alternative and not discard it out of hand. I called this 'out of your box' because they're all doing it, and you're rejecting it a priori. I see basically three legitimate issues with this solution:

a) maintaining a consistent interface for you to be used to
b) providing easy data migration to the replacement device
c) total cost of multiple non-ruggedized devices compared to the realistic lifespan of ruggedized ones.

I'm not suggesting that my parent post had the right thoughts in mind, but Apple does provide surprisingly good, quick and easy solutions for a&b in OS X and the iPhone; I would expect the iPad to continue this.

Apple is not historically great about 'c', but that sand environment is hard even on the modestly ruggedized ones so it's not impossible.

Of course, I imagine their are .e.g Linux distros with good solutions to a & b and other laptop vendors who tend to have a consistent interface.

Of course you might need to account for shipping, purchasing, processing, or environmental costs in 'c', but even on the environmental front it's not a given that one device is better than 3, esp if it gets recycled well (many parts of the sandworn one will still work, and it'll be early enough that those, minus your HD, are reasonable used replacement parts in the right shop...)

Comment: RAID 5 is hurting you in this scenario (Score 1) 411

by arete (#31369826) Attached to: Long-Term Storage of Moderately Large Datasets?

I'd go further and say that in my opinion, and especially at these dataset sizes that are only small multiples of physical drives these days, RAID5 is a hinderance not a benefit to price-performant backup, because it requires validity of all-but-one of the drives in your array... typically, in the CORRECT array, so swapping mirrors in/out may be quite a headache.

Don't use any data level striping; break your data into a couple chunks drive-sized in the filesystem. Keep mirrors of each chunk on drives, both onsite and (one or more) offsite. Bit-compare the drives occasionally to look for loss.

I recommend at least 3 drives for any dataset; at least one onsite and at least one in your lockbox; that leaves one to be in transit at a time.

Replace the drives with newer versions every few years. Use a variety of brands/models.

   

Comment: Printing is tough too, but definitely doable. (Score 1) 266

by arete (#29583615) Attached to: Archiving Digital Artwork For Museum Purchase?

Archival quality printing is also not cheap, but at least it's a fairly solved problem.

Personally I don't think you can do much better than printing it for an option that doesn't involve frequent migration - density isn't great, but I'm confident there'll still be optical scan devices at least for historical works, so if you print out all your bits in an OCR-friendly font, it won't be TOO much work for someone else to read them (if they really want to!) You should also include in the same format the source code for the decoder - even if that's not directly compilable in the future, it'll be a relatively clear indicator of how to do it, to the limits of what's possible.

You could probably do even better by e.g. punching holes into gold sheets a la The Baroque Cycle. Or stone tablets, etc. But those are all questions of "what's the most resilient format for PRINTED text" which is a topic at least we have a bunch of data on.

Comment: I would care to give an example (Score 1) 351

by arete (#29519247) Attached to: No App Store For Microsoft's Zune HD

Actually, MS has tried to implement some Trusted Computing pieces that would do exactly that - restrict what will run so any DRM-broken content can't possibly be played.

Perhaps we could amend your sentence to: "never SUCCESSFULLY locked down..." - because they can't manage to have backward compatibility with all the terrible niche Windows apps and also do things like that.

Comment: Some comments (Score 1) 285

by arete (#29261603) Attached to: The Orange Goo That Could Save Your Laptop

I have no idea what this Orange Goo does, and I haven't read TFA. But I want to comment on your comment:

1) Most electronics are not made with incredibly strong surfaces and shells. If you were to encase your electronics in a perfectly fitting thick walled steel cradle, you'd reduce all events (esp a floor hitting a corner) into only the shock (G force) leaving out the impact (concentration of force on the surface of the device) Both of these parts of an impact are damaging. The fundamental momentum-limit you discuss only applies to the shock, which is most likely to damage internal parts.

2) Some crazy materials can do a surprisingly good job of momentarily pretending to be that idealized steel case. I presume the egg-video above shows that.

3) Typical elastic padding will not spread the momentum distribution out EVENLY over the time it takes to decelerate that 1/8". So even the shock part can be improved.

4) Don't forget that in addition to momentum, you must satisfy the conservation of energy equation, too. The most common way to do this is to bounce, and at least some of this energy gets converted to heat in each material that compresses. Dissipating more energy is also valuable.

Comment: Re:District 9 - rebuttal / "wow you're wrong" (Score 2, Interesting) 443

by arete (#29175907) Attached to: Avatar, Has Sci-fi Found Its Heaven's Gate?

Wow, you're amazingly not good at following plot points. Maybe there are holes in the plot, but they sure aren't the ones you listed.

As much as I want to rebut everything in great detail, it turns out I don't care quite enough. So a few... and I'll endeavor not to add any spoilers you didn't already give, and I'm dekarmaing this post to help.

6. Worker Prawns lack initiative. Definitely said early in the movie.

5. is because of 6.

3. If you PROCESS some material/chemical, it probably has different effects/uses than it had before you processed it. Otherwise why would you process it? Did you miss that whole bit of the movie?

2/3. That part about "powering the command module" - you made that up. At no point is powering a command module ever anything any characters are aspiring to. In the interest of avoiding spoilers, I'll leave it to you to figure out which part of those 4 words you might've gotten wrong.

Comment: District 9 (Score 2, Interesting) 443

by arete (#29174449) Attached to: Avatar, Has Sci-fi Found Its Heaven's Gate?

I was going to say this, but of course you beat me to it. District 9 is one of the most legitimate serious science fiction / extrapolative fiction movies I've seen in a long, long time - things you usually only get in books. A limited number of fantastical assumptions, and then the exploration of the very rational ramifications of those assumptions.

And it was made on a relative shoestring, and the effects are perfect -- and the acting is amazing. But if you're expecting a 100% crazy action/effects movie, District 9 isn't it. (Neither is Inglorious Bastards, which is also awesome)

Comment: I think OP has it backwards - the passwd problem (Score 1) 505

by arete (#29070737) Attached to: How To Stop Businesses Storing SSNs Indefinitely?

I appreciate the OP's concern, but really, any minimum wage peon at a credit or collection agency can look up any SSN in a couple minutes. The people who you need to sue are not the ones using SSNs for IDs, but the credit reporting agencies themselves and anyone else who skipped doing any actual verification of who you are in favor of the much cheaper use of your SSN as a password in direct violation of all the government documentation about how it was NOT secret.

Comment: Re:Yes - Your distribution is right / attorney (Score 1) 782

by arete (#28927357) Attached to: The Ethics of Selling GPLed Software For the iPhone

You're right about this - you can distribute it as long as the source is available. The GPL was never and will never be about free as in beer, it's about being able to verify, to persistently use, and to extend the software you have.

You can charge $1,000,000 for the first copy, if you want - and if you can get someone to pay. But they'll be free to take the source you give them and redistribute copies for $50,000... or for $0.

--

Even if the App Store might now allow a clone app from your source, they would certainly (as certainly as any other App Store submission) allow an app with new levels, or one targeted at blind users (somehow!) or etc. Or maybe someone wants to make it into a psych test. More likely, if you vanish and someone wants to take advantage of iPhone 4.0 features when they come out.

The PRIME scenario is that users are never encumbered by the lack of source or lack of permissions, EXCEPT that they have to pass that forward.

That's what it's about, guaranteeing innovation and stability.

--

Oh, and everyone ELSE's opinions about the GPL should be based on the text. It was carefully constructed so that you could violate the "spirit" of it without violating the letter of it. So if you and he can find an attorney you both trust, the letter of the GPL DOES tell you the spirit of it.

Comment: I'd add a couple additional comments (Score 3, Informative) 393

by arete (#27922105) Attached to: How To Store Internal Hard Drives?

The only big advantage of the externals is that the connectors are a bit more robust, so if you're going to plug/unplug them a LOT, you're a bit better off.

But for maximum longevity you should take 'vibration free' seriously. That is, you shouldn't lay a drive on a hard table, because when you set it there there's a surprisingly large impact. Set it on a layer of bubblewrap or foam, instead.

If you have humidity issues, I believe you can collect desiccant packets from other things and bake them on low heat to 'refresh' them (bake out the existing humidity) Ideally do this baking with good ventilation.

Comment: Make it a browser feature (Score 1) 210

by arete (#27800279) Attached to: Controversial Web "Framing" Makes a Comeback

Well as TFA gives several examples of, there are good uses of such frames. That's the problem... there IS some value here in many cases.

But reading this I think it's clear that we need a browser feature here. That is, something between an extension and straight HTML.

It could even just be that they use the code they already have for backward compatibility but add some kind of hint like 'toolbarframe=true' (ok, that's terrible, but you get my point) It has to identify in the frameset which part is a toolbar and which part is a 'main' page.

If that's present, the browser realizes this frame is supposed to behave like a toolbar. So it:
a) Adds some kind of display of the toolbar URL and an 'x' to close the toolbar 'frame' and automatically go to the main site.

b) Uses the right 'target' URL for the main forward/back/refresh/navigation bar etc., without dropping the toolbar... Basically be aware that it's using frames as a persistent wrapping, not as some other part of layout.

c) Becomes a feature you can explicitly disable in your browser preferences to have no frame toolbars.

Then shame any providers who don't use the hint. Google will figure out how to PageRank the right internal sites with those hints pretty fast, I'd say. Content providers will have no more to complain about than they do with any other toolbar.

Comment: Just disable the camera... epoxy (Score 2, Informative) 442

by arete (#27796601) Attached to: Portables Without Cameras?

A camera is something that can take photos, not something with some parts that could have made a camera. So:

a) pierce the lens if you really want to be crazy, screwing up some nice camera innards. This is relatively risky.

b) Sand the lens and surrounding area a bit.

c) Get some good 2 part epoxy and apply over the camera.

Voila, you no longer have a camera.

Obviously they won't warranty YOUR CAMERA, but you don't have to open it up. If you skip step a, you're not even 'breaking' anything... but if b/c is right you won't ever be able to use that camera again, because you'll have to break apart the body of the laptop along with the lens to.

If you have to ask how much it is, you can't afford it.

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