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Comment: Re:I prefer a tablet for some things to a smart ph (Score 2) 193

by buchner.johannes (#48923997) Attached to: The iPad Is 5 Years Old This Week, But You Still Don't Need One

Tablets are useful for reading colored PDF files (e.g. research articles), for which eBook readers are not meant (better for breakable text).If I were to buy a tablet, I would foremost go for battery life, the most important feature for reading.

Comment: Re:pretty much expected. (Score 2) 38

IT security is about tradeoffs.

Not true, you can have worse security without gaining anything. So you can also increase security without loosing any comfort. You are setting up a false premise that more security always requires a sacrifice. What we really need instead is a measure of achieved security, to rid ourselves of unnecessary, security-theatre-based sacrifices both in terms of privacy and money.

Comment: Re:Mod Parent Up (Score 5, Insightful) 300

by buchner.johannes (#48872383) Attached to: Ask Slashdot: Has the Time Passed For Coding Website from Scratch?

Here's my website. I invite anybody to look at the source code, and compare it against your run-of-the-mill WordPress website.

It doesn't do comments on blog posts, it does not have an interface to post new blog entries, it does not keep track of which articles have been viewed. You might as well generate your pages from templates and serve them statically, 0 lines of python needed on the webserver.

Comment: Re:Choose a CMS you like (Score 4, Informative) 300

by buchner.johannes (#48872345) Attached to: Ask Slashdot: Has the Time Passed For Coding Website from Scratch?

I know all the php/wordpress snobs on /. will dismiss this and laugh but personally if i'm building a site for someone (usually for no money and limited time) I just install wordpress, 'secure it',

I dismiss this and laugh because you think you can secure WordPress.

If you're using WordPress for clients, you better budget in the time you/they will spend upgrading WordPress to fix its latest security vulnerabilities.

Actually you can upgrade Wordpress with the click of a button on the Admin panel. You can even delegate that to your users. Or have Wordpress.com host you. Yes, there are more secure frameworks (your hand-made one is not among them), but few that receive as much auditing as the widely deployed Wordpress.

Building websites based on Wordpress is super-easy, there are extensions for everything, and you can let other people design and integrate the layout/template. Also, other people can take over what you leave behind.
Your other options are things like Drupal or Joomla!, but they take significantly more effort to adapt and hack.

Comment: Re:ok. i'll play. "my experience is... (Score 1) 39

by buchner.johannes (#48870695) Attached to: Jim Blasko Explains 'Unbreakable Coin' (Video 2 of 2)

enduring complaints concerning crypto-currency." yeah, i bought BitCoin back in the day. sold it soon, too. made a little coin. kinda like betting in Vegas. for the lulz.

I suspect that there is an enormous selection bias in that people who made a lot of money with BitCoin are featured in (online) newspapers, those who made a little money comment in discussions and the other 80% who lost a little or a lot of money do not comment.

Also, many people invest a lot in hardware to mine BitCoins (and other Coins), which is where their profits go entirely. That seems like a hamster wheel to me. Those people like the experience of learning about hardware and crypto-currencies. Then again, some people like running in hamster wheels too for fitness, so I think the comparison is not off by much.

Comment: Re:ok. i'll play. "my experience is... (Score 5, Insightful) 39

by buchner.johannes (#48870667) Attached to: Jim Blasko Explains 'Unbreakable Coin' (Video 2 of 2)

"Are you up to loaning bitcoin or something less popular for 10 years?" Confidence in any given currency can be tested with the terms current holders are willing to accept to make loans payable in that same currency. (On the other hand, if large companies will accept it in payment, they've probably got an idea that a given currency will be around next month or next year.)

That does not follow. A large company can accept Bitcoins and convert immediately to their local currency. That does not require faith in a long-term forecast.

Comment: Re:They already have (Score 5, Informative) 666

by buchner.johannes (#48870419) Attached to: US Senate Set To Vote On Whether Climate Change Is a Hoax

Sadly not true. The fashion for some scientists to make names for themselves by producing misleading headlines for their supposed evidence has yet to fizzle.

Was 2014 the warmest it has ever been globally? No.

The satellite records (either one) show no special warmth for 2014 and the BEST record shows no statistical significance to the claim that 2014 was the hottest. Why? Because the tiny increase was well within the error bars of the mean temperature statistic

(The report can be found at http://static.berkeleyearth.or...)

Your argument is misleading. It is true that the question "which was the hottest year since recording in 1860?" Has three possible answers within the uncertainties, 2014, 2010 and 2005. But to the question "which was the hottest decade since recording in 1860?" has a clear answer: the last one. Of course there will be year-to-year fluctuations. But to look at the plot on page 3 and say "oh global warming has stopped just now" is wishful thinking. Also look at the "Ocean Surface Averages", page 5.

Comment: Re:What a crock (Score 2) 75

by buchner.johannes (#48852161) Attached to: Book Review: FreeBSD Mastery: Storage Essentials

why disk encryption might *not* be the right choice:
recovering data can be difficult or impossible,

I was concerned about this as well, and frequent crashes on my laptop (battery empty) can ruin a file system (I have made some bad experience with reiser4 in that regard).

However, I tried it, including forced poweroffs while writing, many crashes, etc., and it is fine. You mount the encryption, and recover the file system as usual, and the encryption layer does not influence the recovery at all.

I can recommend ext4 with LUKS (cryptsetup). It is very easy to set up for a single partition. You can choose AES or TwoFish (512 bit key).

The other thing I was worried about was read/write throughput. There is a benchmark utility that will tell you how how different cyphers perform. However I have never noticed any difference when working with encryption, probably because data comes in blocks and is cached efficiently by the kernel. Today, I do not see any obstacles for encrypting some partitions.

Comment: Re:That is *not* "free" software (Score 1) 75

by buchner.johannes (#48844263) Attached to: The Free Educational Software GCompris Comes To Android

Requiring fees based on the deployment platform used does not constitute "free" software under any open source definition I have ever read.

So you have not read any, and have no idea what you are talking about. Start with the open source definition (opensource.org) and the Free Software Foundation (gnu.org).
https://www.gnu.org/philosophy...
http://opensource.org/faq#free...

You are making, unintentionally, an excellent point that one should refer to gratis software and libre software.
https://en.wikipedia.org/wiki/...
GCompris is always libre software, but sometimes not gratis. That is OK with both the FSF/GNU and OSI.

All theoretical chemistry is really physics; and all theoretical chemists know it. -- Richard P. Feynman

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