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1,747 karma · joined July 4, 2013

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computer··on Ask HN: SSL Certs need to be revoked, right?
Yes. If you run something sensitive, you should also consider:

- Invalidating any open sessions (i.e. cookies), since those could have been stolen.

- Force password changes for all users (since those could have been intercepted in memory)

- Change internal passwords.

computer··on Comic Sans, meet Comic Neue
> "Download Comic Neue, free for a limited time"

What does that mean? There's no real license information anywhere.

computer··on Harvard Study Confirms Fluoride Reduces Children's IQ (2013)
> Yes, so there will be a strong correlation between tight control over flouride in drinking water (e.g. clamping it to 1mg/L or so versus not deflouridating at 10mg/L levels) and a wealthier environment with good infrastructure. I think it's just so hard to "weight" for the differences here.

Except that they used models in many studies, likely with factors for wealth, area, etc. This attempts to control for those factors, meaning they no longer have their intuitive effect on outcomes. Now, I say "attempts", because it corrects for some measurement of wealth and area, not the full underlying structure.

You're basically left with an "empty" correlation between IQ and fluoride in the data, but useless for causation conclusions. By "empty" I mean that you have attempted to correct for all known factors like some measurement of wealth, but there are always still many unknown underlying factors that might cause issues. That's what randomization solves.

Also note that many of the source studies are from China. This might sound odd to people outside academics, but due to many factors you should generally judge studies from most Chinese universities as less trustworthy than from other countries.

computer··on Harvard Study Confirms Fluoride Reduces Children's IQ (2013)
The title is wrong (i.e. not supported by the data).

This was a meta-review of observational (non-randomized) trials. It's a classical case of correlation not equaling causation-- there was no randomized trial, and since education (of parents) and location are highly correlated, any non-randomized studies cannot be used to prove a causal relationship.

computer··on This girl in SF stole my MacBook Air
> Whenever I get asked to watch another person's stuff in a cafe, I wonder to myself why they think I'm so worthy of their trust.

Because by asking you, they are trusting you. By not asking anyone, they have to trust every single person around.

computer··on Recreating the THX Deep Note
Iannis Xenakis' song Metastasis got there first as far as I know, in 1953 with a full orchestra. It has a slightly different (less harmonic) end:

https://www.youtube.com/watch?v=SZazYFchLRI (mostly the first minute)

It's one of my favorite songs, mostly for when I want to be left alone in a room.

computer··on The right way to ask users for iOS permissions
Google Location Services does it every time you turn on GPS on a Kitkat android phone, if you've turned their location services permission off.
computer··on Ask HN: Why are all the Eich posts being deleted?
Instead of banning the discussion, consider banning the people making it bad. Or, if they are otherwise worthwhile contributors, warn them first.

I'm not sure what options the moderators have right now, but perhaps you should consider adding a three-strikes policy for users making clearly awful comments, with a simple "warn"-UI button for mods.

computer··on Help fund Rails Girls Summer of Code 2014
I have experience with summer camps for Mathematics (as a participant) for kids from 10-18. I'm not sure how they manage to achieve it, but it was probably 55%/45% male/female. I think that half the camp elders being female helped a lot, as well as wise promotion and word of mouth after 20 successful years.

I feel that the camps being mixed added a ton to the experience. I can't begin to describe all the benefits, but for me as a boy, the camps first showed me that both genders can be interested in nerdy stuff, and that such interests are actually fine and quite normal.

However, if it would have been 95% boys, I think it would have been better to split them by gender. Especially among children it's hard to be the only girl in a group of only boys. Then, once the girl group starts to grow by intelligent promotion and word of mouth, perhaps you can merge the camps once the split is more favorable.

computer··on A first look at my microbiome
You need to know standard deviations: the standard error of the measuring device (from Biome), the standard deviation within a subject (i.e. between measurements on different places, different times in one person) and between subjects.

Until you know those, you will be unable to conclude anything from these numbers.

computer··on CryptoCat iOS Application Penetration Test [pdf]
I wasn't going to post this, but I had the same feeling at a conference. Also, if I remember correctly, the first version that got audited turned out to be extremely insecure as well, with their own custom crypto protocols? I haven't recommended CryptoCat to anyone since, and still wouldn't.

This audit report is another fascinating read to see all the mistakes I would probably have made as well. Secure crypto is so incredibly difficult to get right...

computer··on Police arrested Dutch man with Bitcoin mining farm for money laundering
For what it's worth, I think when this comment was made the submission linked to a different article-- Tweakers.net, the current source, is the most respected Dutch language tech news source.
computer··on Tarsnap price cut
Or use duplicity. It even directly supports many cloud-services as backend, including Google Drive ($2 for 100GB, $10 for 1TB) Dropbox, Onedrive, etc. It encrypts, deduplicates, stores old versions, etc.
computer··on 8.0 earthquake strikes northern Chile
Here's a site where you can monitor the sea level live: http://www.ioc-sealevelmonitoring.org/station.php?code=pisa (as long as the site is up. Multiple measuring stations available there)

For now the highest is 2 meters. If the site is not working, here's a screenshot from right after it began: https://twitter.com/severestudios/status/451151233739288576 After that it went wildly up and down.

Keep in mind that a tsunami can have wildly different heights and properties in different places.

computer··on Virgin Media, why are you manipulating my traffic?
If that were true, they should just do what the law according to you says, and ban Google and other search engines. Let the customers then take their anger to those politicians responsible.
computer··on OkCupid urges users to abandon Firefox
Flash uses ActionScript, which is an implementation of ECMAScript, which was designed by Brandan Eich. ECMAScript is a standardization of Javascript.

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

computer··on The new TLDs are here, do you really need Yourname.BLARGH?
It's a pledge, so likely voluntary, not automatic.
computer··on The new TLDs are here, do you really need Yourname.BLARGH?
With uncommon domain extensions I always fear that they might jack up the rates at some point in the future, going from $20/year to $250/year or even more.

Still, my personal site and email is on a fairly obscure country TLD, and I hope they will never do something like that, being a country and all. With these new TLDs for which companies paid large amounts of money, who knows what might happen?

Does anyone know if such a bait and switch has ever happened in domain-land?

computer··on SpiderOak: Get Unlimited Storage in Honor of World Backup Day
So right now I'm backing up 80gb of data to Google Drive for $2 per month. Switching back to SpiderOak would allow me to add my media collection that I always considered too large to back up online.

But is this SpiderOak plan sustainable? Let's say the average person who gets this plan backs up 500 GB in the first month. Hard drives cost ~$0.04 per GB, so that would cost $40 to store assuming they store it on 2 drives. Let's double it since we're estimating, add a bit for bandwidth, and it seems doable.

As long as people don't keep backing up more and more year after year, that seems pretty sustainable, since they keep getting $125/year.

I guess I should sign up.

computer··on Tarsnap now accepts Bitcoin
Suboptimal in what way? I doubt that would be optimal for profit.
computer··on Popular startup stole my code – now what?
That's a problem. It's easiest if the exit is an IPO, since that's announced in advance.

I've seen this strategy used on a fairly large company about to be acquired by a public company, when there were already rumors going around before the acquisition. It caused the management there an enormous amount of stress, and they settled for a significant amount of money, even when they believed a court would rule in their favor.

You're an awful person if you use this, so better make sure the company you use it on is even worse.

computer··on Gnome 3.12 Released
My XFCE4 doesn't have it. It might be in some configuration option though.
computer··on Popular startup stole my code – now what?
Wait until they are close to exiting and then threaten to sue for 5%, settle for 2%. It's the absolute worst timing for a startup to get hit with something like this.

Of course, only do it if you're actually in the right, so check with a lawyer first.

computer··on Amazon S3 Pricing Changes Effective April 1, 2014
There's a fair number of hosts where you simply get a 10, 100 or 1000mbps port and then use it for unlimited traffic. As long as the provider doesn't pay per MB, there's no issue in filling it up. The main difference with places like S3 is that S3 has great peering arrangements all over the world, whereas such a host probably has worse peering to some places.

But I did ~50 TB of traffic per month at various hosts for <$20 without any issue. Just choose them well, and know exactly what kind of connection they offer.

computer··on Amazon S3 Pricing Changes Effective April 1, 2014
If S3 storage pricing was the issue for this startup they could always have gone with their own dedicated servers for storage for a fraction of the cost. For that reason, I doubt a lower S3 cost would have prevented them from shutting down.
computer··on Gracefully Dropping Support for Dinosaur Browsers in Trello
It might very well come on April 8th, since malware authors who find exploits in the period leading up to that date would wisely wait until right after the no-more-patching cliff to release their new 0days.
computer··on Backup Awareness Week
Getting a "Drobo product" (NAS) won't do much when your house burns down or gets robbed. To be safe, you need your data to be in multiple physical locations.
computer··on Backup Awareness Week
Print them twice and store them in different locations.

Or more realistically: batch-resize the photo's so that they are much smaller, and save that version of manageable size somewhere online as a last resort for when a disaster destroys all your current full-sized copies.

computer··on Backup Awareness Week
I use a cronjob that uses duplicity for encrypted backups with Google Drive as external storage (python2-gdata package on Arch). After Google dropped their price on 100GB to $2/month they became the cheapest option for me.

I'd love to use something like Tarsnap, but storing my ~80GB of data with them would cost $24/month plus $0.30 per gigabyte of bandwidth. And rsync.net is $0.10 per GB of storage, so that would be $8/month. (that price only when signing up through git-annex http://www.rsync.net/products/git-annex-pricing.html )

computer··on I took ads off my website in favor of Bitcoin donations
So it seems that the business model being evaluated here is to replace ads by bitcoin donation buttons, and then promote the fact that you've done that to pro-bitcoin audiences in the hopes that they donate.

That's fine, but the conclusions won't generalize to blogs in general.

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