HNHacker News
TopNewBestAskShowJobs

garretruh

344 karma · joined May 23, 2012

Garret Ruh

garretruh@gmail.com

submissionscomments
garretruh··on SpaceX Launch Targeting 6:03pm ET, Extreme Weather Preventing First Stage Recovery
This launch was/is going to be the first one without a boost back. Because of DSCOVR's mass and destination (Earth-Sun L1 point), there isn't enough fuel to make a boost back burn. That's why the barge is ~650 km off the coast[0] instead of the 350 km it was for CRS-5[1].

[0] https://www.google.com/maps/d/u/0/viewer?mid=zp15b_P5ERVk.kQ...

[1] https://mapsengine.google.com/map/u/0/viewer?mid=zp15b_P5ERV...

garretruh··on SpaceX CRS-5 Launch
SpaceX has said that they will announce the status of the first stage as soon as they know on the webcast. And if successful (and they have a good link to the barge), they'll also play a replay of the landing.

EDIT: Or not. Looks like they wound down the SpaceX broadcast. NASA TV is still broadcasting the launch though.

garretruh··on SpaceX CRS-5 Launch
It's completed it's boost back burn, so it's on a trajectory towards the landing barge (positioned off shore a good distance).

EDIT: All this is just from the radio transmissions broadcast on the SpaceX YouTube stream.

garretruh··on SpaceX CRS-5 Launch
Stage 1 separation. Here we go.

EDIT: "Stage 1 boost back shutdown"

EDIT 2: "Loss of signal from Stage 1" (expected)

garretruh··on Police allow car break-ins to become a Seattle growth industry
It looks like that is indeed the case://openbook.sfgov.org/openbooks/cgi-bin/cognosisapi.dll?b_action=cognosViewer&ui.action=run&ui.object=%2fcontent%2ffolder%5b%40name%3d%27Reports%27%5d%2freport%5b%40name%3d%27Budget%27%5d&ui.name=20Budget&run.outputFormat=&run.prompt=false
garretruh··on IRIS+
Obviously you can't. The geofence (as implemented in ArduPilot) is simply a safety measure; once the aircraft passes outside of a defined zone, it returns to a pre-determined waypoint inside the fence and waits for further pilot commands.

To answer the initial question, the latest versions of ArduPilot implement terrain following (based on terrain data loaded into the flight computer before-hand). Additionally, there is also now support for range-finding instruments like Lidar Lite [0], although I don't believe those are currently being used in the terrain following mode. Such instruments could conceivably be used to implement "look-ahead" functionality to more accurately avoid obstacles.

[0] https://store.3drobotics.com/products/lidar-lite

garretruh··on Show HN: Air-Control.com makes instant changes to native apps iOS Android
They claim on their Kickstarter that they can get around this:

The Apple Review process restrictions are very specific. Apple forbids the dynamic loading of remote code. But this is not what Air-Control does, our library contains all the code it needs so no code is loaded dynamically. Our library only downloads content and configurations, which is permitted by Apple.

For a very similar use case we can reference our existing tool, nativeCSS, which is a dynamic styling library for iOS and Android. This is very similar to what Air-Control does, it downloads styles and applies them to a running app. This has been installed in a wide range of Apps, and has been approved by Apple since its launch in December 2012.

Whether or not Apple actually goes for this is another question entirely.

garretruh··on Why my children were lucky to get accepted to a Finnish school in Qatar
Honestly, I think exposure to a country in which the population lacks rights that most Western populations enjoy has a value of its own. It makes it much harder to take those rights for granted.
garretruh··on NPR One
At least during the beta, a "Donate" segment would occasionally be interspersed between programs/segments; the app displayed a button that linked you to the start of their online donation process.
garretruh··on Bitcoin Falls Below $400
Not the GP, but there's a pretty extensive list of providers here: https://en.bitcoin.it/wiki/Virtual_private_server
garretruh··on Developer ports iOS core to non-Apple hardware
Hackintoshes are largely possible because it's possible to get almost the same components used in Macs on regular PCs. It might be a little more difficult to get your hands on the chips Apple uses in iPhones/iPads (not to mention cobbling them together). Not that doing so wouldn't be pretty awesome.
garretruh··on Apple Unveils The iPhone 5S
The China event was only "tomorrow" so far as Beijing is 15 hours ahead of California. It was just a live stream of the announcement IIRC.
garretruh··on To my daughter's high school programming teacher
I'd tend to agree with you. But the problem of teaching it still remains. While it'd be great for dedicated teachers at each school to create a flexible, Javascript-based curriculum built around online courses and projects, I think the reality is that very few would have the time, energy, or motivation to do so. So far as I know, there don't exist very many Javascript textbooks aimed at the high school, middle school, and (hopefully) elementary school levels. Without that kind of traditional material, it's difficult for even passionate teachers to get classes approved by administrators.
garretruh··on To my daughter's high school programming teacher
With regards to your third point:

Is there a modern (or better suited for introductory courses) language that has the kind of curriculums built around it that VB and Java do?

Codecademy and the like are awesome for independent learning and exploration, but it doesn't work for classroom instruction. There don't seem to be many curriculums designed around modern, web-focused languages like Ruby or Javascript that your average teacher can use for high school CS classes.

garretruh··on Kit Kat's homepage is currently a parody of Android announcement page
No, in the US they're made by Hershey. Elsewhere its Nestlé.
garretruh··on Cloud server showdown: Amazon AWS EC2 vs. Linode vs. DigitalOcean
DO actually offers both San Francisco and Amsterdam locations in addition to New York.
garretruh··on Nginx for Developers: An Introduction
*makes

See Muphry's law. :)

garretruh··on Stellar Wind (code name)
Ataturk. http://en.wikipedia.org/wiki/Mustafa_Kemal_Atatürk#Establish...
garretruh··on Belgian woman blindly drove 900 miles across Europe due to broken GPS
Somehow, I doubt that a map would have helped this woman much.
garretruh··on Build it with me: Bitcoin wallet for Mac
Do people really prefer graphical git over the command line? I'm honestly curious. FTP with a GUI I get, but it doesn't seem like git lends itself as well to such a UI.
garretruh··on Why are clients shocked by the price for web development?
Not only that, but an architect, construction crew, building inspector, and janitor.
garretruh··on On Citizenship in open-source software development
Agreed. A dev with 100s of "karma points" on a certain PHP project should start at 0 on other projects (both of the same and different languages).
garretruh··on Shenzhen is Like Living in a City-Sized TechShop
Having been to similar buildings/stores (though not quite the size of the Shenzhen ones) in Shanghai, it's very easy to spend hours upon hours browsing the crowded aisles. That's definitely one of the primary things I missed moving back to the states. Well, that and real Chinese food.
garretruh··on Tearable Cloth Simulation in JavaScript
Lucky you. It maxes out the CPU on an early 2008 (2.4 GHz w/ x3100) MacBook. I guess an actual GPU makes all the difference.
garretruh··on Explosions near Boston Marathon finish line
You might be right. It's contradicted by both Sprint and Verizon here: http://bigstory.ap.org/article/official-cellphone-service-sh...

Edit: And, it seems, AT&T: https://twitter.com/ATT/status/323915702132150272

garretruh··on 4K gyro-stabilized aerial video of San Francisco
I think the implication was that the military (or drone hobbyists) likely already have similar tech on their UAV platforms. Though maybe not capable of 4K.
garretruh··on Global Internet slows after 'biggest attack in history'
Relevant blog post from CloudFlare:

http://blog.cloudflare.com/the-ddos-that-knocked-spamhaus-of...

garretruh··on Show HN: JFDIN - Just Fucking Do It Now
Definitely implement this. And add email notifications when the URL is clicked AND when the timer runs out.
garretruh··on How Facebook Gets Away With Being Broken On Purpose
Source? I haven't heard anything about this.
garretruh··on Spec analysis: XBox720 vs PS4
Who'll promptly switch/add advertising on the Xbox. Which sends more cash Microsoft's way.
Page 1 of 2Next →