mx12
Joined 17 years ago
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160
Submissions
40
Member since
Nov 6
Recent submissions
Comment · 5 years ago
Comment · 9 years ago
I have been doing the same thing. I've also augmented each section with video lectures from Khan academy or other sources. For instance, their videos on the Jacobian were excellent for getting an intuitive understanding of it [1].
I also search for problems on the topic to help solidify my knowledge. You can almost always find a class that has posted problems for a section with answers.
[1] https://www.khanacademy.org/math/multivariable-calculus/mult...
Comment · 11 years ago
It works by RSSI [1], and I believe you can calibrate it with your antenna/case design. Not to mention any attenuation by the phone's antenna or your hand/body.
Quote:
"Phones or other smart devices can pick up the beacon’s signal and estimate the distance by measuring received signal strength (RSSI). The closer you are to the beacon, the stronger the signal. Remember that the beacon is not broadcasting continuously—it’s blinking instead. The more frequent the blinks, the more reliable the signal detection."
Comment · 11 years ago
Speaking as someone who just left a startup to join Google, I was excited in getting really stock options that after vesting could be exercised and sold.
It's a long road to go from options to real money. Something I didn't realized before joining a startup. There are many points at which you could be locked in if the company is sold or other events happen.
Comment · 12 years ago
That's awesome that you made it open source!
Maybe I'll to try implement one of my ideas for Tinder. That is A/B testing of profiles in different locations. Let's say I live in SF and could set up a weeks worth of testing with various different profile pictures and determine which one gets the most swipe rights in different parts of the country. Then I could use that profile in my own location.
Comment · 12 years ago
IIRC the MINST data has a mix of style of 4's. I tried it with an open top, and it worked correctly. I wondering if they just happened to sample a majority of 4s that have an open top.
Example: http://imgur.com/mRRz1L3
Comment · 12 years ago
If you're interested in more camera hacking, here is a very interesting talk from last years black hat about hacking security cameras.
Title: Black Hat USA 2013 - Exploiting Network Surveillance Cameras Like a Hollywood Hacker https://www.youtube.com/watch?v=LaI0xjeefpg
Comment · 12 years ago
Here's a link to the full video:
http://www.dailymotion.com/video/xxxiij_moon-machines-2008-p...
Around 37 minutes they talk about the alarms on approach and how the dealt with them.
Comment · 12 years ago
After I saw this guide a while ago, I got really interested in lock picking and ended up buy a kit. There a decent subreddit and it's a good resource to get started. I purchased the kit they recommend PXS-14, and it works great. I remember I picked my first lock in about 5 minutes and then spend another hour trying to do it again. It takes a while to feel right and become consistent.
Subreddit:
http://www.reddit.com/r/lockpicking
Plus there getting starting guide:
http://www.reddit.com/r/lockpicking/comments/bzq80/where_do_...
PXS-14 Kit:
Comment · 12 years ago
I don't think that Apple will completely get away from x86 for a long time. Attempting to emulate the x86 on an Arm would be terribly slow.
I do however, think that they will eventually include both arm and x86 processors in the Macbook Air. That way, backwards compatibility is preserved and low power apps can run on the arm. In the current Macbook Pros they have dynamic switching of GPUs, there's no reason they couldn't use the arm as a coprocessor or even run the full OS.
Here a few technical points:
* LLVM - You can compile once for both both architecture and then the JIT will take over compiling for the specific architecture (Take a look at llvm for the OpenGL pipe line in OSX)
Full screen app- When an app is full screen (if it's a low power app) then the x86 could sleep and the arm could switch to running the app.
App nap - If all x86 apps are a sleep, switch over the running the arm processor exclusively
*Saving State - It's possible to save the state of apps in OSX, a similar mechanism could be used to seamlessly migrated between processors.
This is pure speculation, but it is feasible. There would be many technical challenges that Apple would have to solve but the a capable. The advantage Apple has is that they have absolute control over both platforms.
Comment · 15 years ago
Why did't they do this on Friday evening? That would have given enough time for people to fully understand what this means. Instead, there is going to be a big sell off tomorrow morning. I understand there would be a sell off tomorrow, but maybe not as big. The stock has dropped nearly 20 points in after hours.
Comment · 15 years ago
A friend and I launched a chrome plugin/bookmarklet for recommending songs for turntable.fm at http://www.turntaste.com. It also gives you a list of rooms that are similar to your current room, and shows the top songs played in those rooms.
Comment · 15 years ago
This reminds me of Radio Shack's Engineering's Mini-Notebook series. I still have a copy of the 555 timer one that was given to me by my high school electronics teacher.
Comment · 15 years ago
IMAX 3D uses linear polarized light, whereas RealD uses circularly polarized light.
A fun story. A friend and I created a chrome extension called Turntaste [1] that would help suggest what to play based on what was previously played and help avoid songs to play. Basically, we used everyone who used the chrome extension to scrape the play history and stats. I was hoping to apply some cool ML... well cool for 2011 ... as I was doing my PhD in ML but ended up just using some simpler statistics based approaches. My favorite room was something like “Trending Indie - No Mumford & Sons”.
It was also used to generate a few cool playlist like a trending indie Spotify playlist [2]. It’s a bit frozen in time since it stopped working whenever the site went down.
[1] https://turntablefmfans.wordpress.com/tag/turntaste/ [2] https://open.spotify.com/playlist/63h132rkg3oNhirWbJqGWZ?si=...