- Machine Learning Done Wrong — [M]ost practitioners pick the modeling algorithm they are most familiar with rather than pick the one which best suits the data. In this post, I would like to share some common mistakes (the don’t-s).
- Bandits for Recommendations — A common problem for internet-based companies is: which piece of content should we display? Google has this problem (which ad to show), Facebook has this problem (which friend’s post to show), and RichRelevance has this problem (which product recommendation to show). Many of the promising solutions come from the study of the multi-armed bandit problem.
- Droplets — the Droplet is almost spherical, can self-right after being poured out of a bucket, and has the hardware capabilities to organize into complex shapes with its neighbors due to accurate range and bearing. Droplets are available open-source and use cheap vibration motors and a 3D printed shell. (via Robohub)
- Apple’s App Store Approval Guidelines — some of the plainest English I’ve seen, especially the Introduction. I can only aspire to that clarity. If your App looks like it was cobbled together in a few days, or you’re trying to get your first practice App into the store to impress your friends, please brace yourself for rejection. We have lots of serious developers who don’t want their quality Apps to be surrounded by amateur hour.
Learning Machine Learning, Pokemon Coding, Drone Coverage, and Optimization Guide
- CalTech Machine Learning Video Library — a pile of video introductions to different machine learning concepts.
- Awesome Pokemon Hack — each inventory item has a number associated with it, they are kept at a particular memory location, and there’s a glitch in the game that executes code at that location so … you can program by assembling items and then triggering the glitch. SO COOL.
- Drone Footage of Bangkok Protests — including water cannons.
- The Mature Optimization Handbook — free, well thought out, and well written. My favourite line: In exchange for that saved space, you have created a hidden dependency on clairvoyance.
Will WebRTC disrupt or be disrupted?
WebRTC promises to deliver computer to computer communications with minimal reliance on central servers to manage the conversation. Peer-to-peer systems promise smoother exchanges without the tremendous scale challenges of running video, for example, through central points.
The WebRTC Conference and Expo was unlike any other web conference I’ve attended. Though technologies in development are common at tech conferences, I can’t remember attending a show that was focused on a technology whose future had these levels of promise and uncertainty. Also, despite the name, WebRTC doesn’t resemble much of the Web despite being built into some browsers (more hopefully coming soon) and supporting HTTP(S) proxying.
Flying Robot, State of Cyberspace, H.264, and Principal Component Analysis
- Insect-Inspired Collision-Resistant Robot — clever hack to make it stable despite bouncing off things.
- The Battle for Power on the Internet (Bruce Schneier) — the state of cyberspace. [M]ost of the time, a new technology benefits the nimble first. […] In other words, there will be an increasing time period during which nimble distributed powers can make use of new technologies before slow institutional powers can make better use of those technologies.
- Cisco’s H.264 Good News (Brendan Eich) — Cisco is paying the license fees for a particular implementation of H.264 to be used in open source software, enabling it to be the basis of web streaming video across all browsers (even the open source ones). It’s not as ideal a solution as it might sound.
- Principal Component Analysis for Dummies — This post will give a very broad overview of PCA, describing eigenvectors and eigenvalues (which you need to know about to understand it) and showing how you can reduce the dimensions of data using PCA. As I said it’s a neat tool to use in information theory, and even though the maths is a bit complicated, you only need to get a broad idea of what’s going on to be able to use it effectively.
Disk Over Ethernet, Inside Elite, Polar Charts, and R Videos
- Seagate Kinetic Storage — In the words of Geoff Arnold: The physical interconnect to the disk drive is now Ethernet. The interface is a simple key-value object oriented access scheme, implemented using Google Protocol Buffers. It supports key-based CRUD (create, read, update and delete); it also implements third-party transfers (“transfer the objects with keys X, Y and Z to the drive with IP address 188.8.131.52”). Configuration is based on DHCP, and everything can be authenticated and encrypted. The system supports a variety of key schemas to make it easy for various storage services to shard the data across multiple drives.
- Masters of Their Universe (Guardian) — well-written and fascinating story of the creation of the Elite game (one founder of which went on to make the Raspberry Pi). The classic action game of the early 1980s – Defender, Pac Man – was set in a perpetual present tense, a sort of arcade Eden in which there were always enemies to zap or gobble, but nothing ever changed apart from the score. By letting the player tool up with better guns, Bell and Braben were introducing a whole new dimension, the dimension of time.
- Micropolar (github) — A tiny polar charts library made with D3.js.
- Introduction to R (YouTube) — 21 short videos from Google.
Video Editing, Game Engine, Python Debugger, and P2P VPN
Filmic Photogrammetry, Car APIs, Takedowns, and OpenCV for Processing
- Sifted — 7 minute animation set in a point cloud world, using photogrammetry in film-making. My brilliant cousin Ben wrote the software behind it. See this newspaper article and tv report for more.
- Vehicle Tech Out of Sync with Drivers’ Devices — Ford Motor Co. has its own system. Apple Inc. is working with one set of automakers to design an interface that works better with its iPhone line. Some of the same car companies and others have joined the Car Connectivity Consortium, which is working with the major Android phone brands to develop a different interface. FFS. “… you are changing your phone every other year, and the top-of-mind apps are continuously changing.” That’s why Chevrolet, Mini and some other automakers are starting to offer screens that mirror apps from a smartphone.
- Incentives in Notice and Takedown (PDF) — findings summarised in Blocking and Removing Illegal Child Sexual Content: Analysis from a Technical and Legal Perspective: financial institutions seemed to be relatively successful at removing phishing websites while it took on average 150 times longer to remove child pornography.
- OpenCV for Processing (Github) — OpenCV for Processing is based on the official OpenCV Java bindings. Therefore, in addition to a suite of friendly functions for all the basics, you can also do anything that OpenCV can do. And a book from O’Reilly, and it’ll be CC-licensed. All is win. (via Greg Borenstein)