Introduction to Behaviour Trees — DAGs with codey nodes. Behavior trees replace the often intangible growing mess of state transitions of finite state machines (FSMs) with a more restrictive but also more structured traversal defining approach.
P vs NP Cheat Sheet — the space and time Big-O complexities of common algorithms used in Computer Science.
Rapid Hardware Iteration at Scale (Forbes) — It’s part of the unique way that Xiaomi operates, closely analyzing the user feedback it gets on its smartphones and following the suggestions it likes for the next batch of 100,000 phones. It releases them every Tuesday at noon Beijing time.
Machine Learning of Hierarchical Clustering to Segment 2D and 3D Images (PLoS One) — We propose an active learning approach for performing hierarchical agglomerative segmentation from superpixels. Our method combines multiple features at all scales of the agglomerative process, works for data with an arbitrary number of dimensions, and scales to very large datasets.
Kratu — an Open Source client-side analysis framework to create simple yet powerful renditions of data. It allows you to dynamically adjust your view of the data to highlight issues, opportunities and correlations in the data.
Science Not as Self-Correcting As It Thinks (Economist) — REALLY good discussion of the shortcomings in statistical practice by scientists, peer-review failures, and the complexities of experimental procedure and fuzziness of what reproducibility might actually mean.
Reproducibility Initiative Receives Grant to Validate Landmark Cancer Studies — The key experimental findings from each cancer study will be replicated by experts from the Science Exchange network according to best practices for replication established by the Center for Open Science through the Center’s Open Science Framework, and the impact of the replications will be tracked on Mendeley’s research analytics platform. All of the ultimate publications and data will be freely available online, providing the first publicly available complete dataset of replicated biomedical research and representing a major advancement in the study of reproducibility of research.
Reimagine the Chemistry Set — $50k prize in contest to design a “chemistry set” type kit that will engage kids as young as 8 and inspire people who are 88. We’re looking for ideas that encourage kids to explore, create, build and question. We’re looking for ideas that honor kids’ curiosity about how things work. Backed by the Moore Foundation and Society for Science and the Public.
An Interactive Machine Learning System for Recognizing Hand Gestures (Greg Borenstein) — a mixed-initiative interactive machine learning system for recognizing hand gestures. It attempts to give the user visibility into the classifier’s prediction confidence and control of the conditions under which the system actively requests labeled gestures when its predictions are uncertain. (an exercise for his MIT class)
First Drone Conference Takes Off (Makezine) — forgive them the puns, Lord, for they know not what they do … uble intendre. Write-up fascinating beyond the headline. Dr. Vijay Kumar of the University of Pennsylvania School of Engineering spoke about socially positive uses for aerial robotics, such as emergency first responders. Dr. Kumar’s work focuses on micro aerial vehicles. He explains that, “size does matter.” As robots get smaller, mass and inertial is reduced. If you halve the mass, the acceleration doubles and the angular acceleration quadruples. This makes for a robot that is fast and responsive, ideal for operating indoors or out, and perfect for search and rescue missions in collapsed buildings or around other hazards.
Standing Up to Mississippi (Carl Malamud) — yesterday we received a Certified Letter from the Attorney General’s Special Assistant Attorney General demanding that we remove these materials from the Internet and all other electronic or non-electronic media. There was no email address, so I proceeded to prepare a 67-page return reply with Exhibits A-L. I thought folks might be interested in the 7 steps of the production process. Give to his Kickstarter project, folks!
Case and Molly, a Game Inspired by Neuromancer (Greg Borenstein) — On reading Neuromancer today, this dynamic feels all too familiar. We constantly navigate the tension between the physical and the digital in a state of continuous partial attention. We try to walk down the street while sending text messages or looking up GPS directions. We mix focused work with a stream of instant message and social media conversations. We dive into the sudden and remote intimacy of seeing a family member’s face appear on FaceTime or Google Hangout. “Case and Molly” uses the mechanics and aesthetics of Neuromancer’s account of cyberspace/meatspace coordination to explore this dynamic.
Rethinking Ray Ozzie — an inescapable conclusion: Ray Ozzie was right. And Microsoft’s senior leadership did not listen, certainly not at the time, and perhaps not until it was too late. Hear, hear!
Airmail — Mac gmail client with offline mode that fails to suck.
The Page-Fault Weird Machine: Lessons in Instruction-less Computation (Usenix) — video, audio, and text of a paper that’ll make your head hurt. We demonstrate a Turing-complete execution environment driven solely by the IA32 architecture’s interrupt handling and memory translation tables, in which the processor is trapped in a series of page faults and double faults, without ever successfully dispatching any instructions. LOLWUT?!
Steve Yegge on GROK (YouTube) — The Grok Project is an internal Google initiative to simplify the navigation and querying of very large program source repositories. We have designed and implemented a language-neutral, canonical representation for source code and compiler metadata. Our data production pipeline runs compiler clusters over all Google’s code and third-party code, extracting syntactic and semantic information. The data is then indexed and served to a wide variety of clients with specialized needs. The entire ecosystem is evolving into an extensible platform that permits languages, tools, clients and build systems to interoperate in well-defined, standardized protocols.
Deep Learning for Semantic Analysis — When trained on the new treebank, this model outperforms all previous methods on several metrics. It pushes the state of the art in single sentence positive/negative classification from 80% up to 85.4%. The accuracy of predicting fine-grained sentiment labels for all phrases reaches 80.7%, an improvement of 9.7% over bag of features baselines. Lastly, it is the only model that can accurately capture the effect of contrastive conjunctions as well as negation and its scope at various tree levels for both positive and negative phrases.
Fireshell — workflow tools and framework for front-end developers.
Google Has Spent 21 Billion on Data Centers — The company invested a record $1.6 billion in its data centers in the second quarter of 2013. Puts my impulse-purchased second external hard-drive into context, doesn’t it honey?
10x Engineer (Shanley) — in which the idea that it’s scientifically shown that some engineers are innately 10x others is given a rough and vigorous debunking.
How to Hire — great advice, including “Poaching is the titty twister of Silicon Valley relationships”.