ENTRIES TAGGED "bitcoin"

Four short links: 21 March 2014

Four short links: 21 March 2014

PHP++, Planning, BitCoin, and Concurrency

  1. Hack — PHP with types, generics, collections, lambdas. From Facebook.
  2. Solve Hard Things EarlyBuild great habits around communication and decision-making when everyone still knows each other well.
  3. Marginally Useful (Paul Ford) — The last two decades have suggested a post-scarcity economy, where infinite copies of attractive digital things have a price approaching $0. Maybe that was merely a passing moment that we will look back upon with wonder once limited coins enforce scarcity—once the owner of a piece of digital art can look upon it with satisfaction and know with total, cryptographic certainty that because he paid for it, it belongs to him and no one else.
  4. Go Pipelines and Cancellation — Go’s fascinating me, as an example of a language designed for concurrency and syntactic familiarity.
Comment: 1 |
Four short links: 13 March 2014

Four short links: 13 March 2014

Parallel Programming, Malignant Computation, Politicised GDS, and Data Stream Toolkit

  1. Is Parallel Programming Hard? And, If So, What Can You Do About It? — book by Paul E. McKenney, on single-machine multi-CPU parallel programming.
  2. Malignant ComputationThe bitcoin mining network would work just as well if it had far less computation devoted to it. Bitcoins would be mined at exactly the same rate if 1/2 or 1/4 of the computational resources were devoted. This means that bitcoin has incentivized a tremendous amount of computational busy work.
  3. GDS Becomes Political (Computer Weekly) — She [Opposition MP] said that digital should not be about imposing a way of working on the public sector – Labour is not fond of the “digital by default” mantra – but about supporting public service delivery. [...] “When this government decided upon the digitalisation of this [online job search] service they apparently did not take into account those with poor literacy skills, mental health issues or learning difficulties – who, as most people would have predicted, make up a higher-than-average proportion of the unemployed.”
  4. streamtools (Github) — a graphical toolkit for dealing with streams of data. Streamtools makes it easy to explore, analyse, modify and learn from streams of data. (via OpenNews)
Comment |

Failure is a fundamental component of business evolution

The MtGox bitcoin exchange failure illustrates exactly how capitalism should work.

This post originally appeared on Andreas Antonopoulos’ personal biographical site; it is republished here with permission. In the free market, failure is always an option. The United States has one of the world’s most vibrant entrepreneurial cultures, where millions of people start small businesses, create new products and invent new technology. Part of the startup culture is the…
Read Full Post | Comment: 1 |
Four short links: 7 March 2014

Four short links: 7 March 2014

Distributed Javascript, Inclusion, Geek's Shenzhen Tourguide, Bitcautionary Tales

  1. Coalescecommunication framework for distributed JavaScript. Looking for important unsolved problems in computer science? Reusable tools for distributed anything.
  2. Where Do All The Women Go?Inclusion of at least one woman among the conveners increased the proportion of female speakers by 72% compared with those convened by men alone.
  3. The Ultimate Electronics Hobbyists Guide to Shenzhen — by OSCON legend and Kiwi Foo alum, Jon Oxer.
  4. Bitcoin’s Uncomfortable Similarity to Some Shady Episodes in Financial History (Casey Research) — Bitcoin itself need serious work if it is to find a place in that movement long term. It lacks community governance, certification, accountability, regulatory tension, and insurance—all of which are necessary for a currency to be successful in the long run. (via Jim Stogdill)
Comment |
Four short links: 4 March 2014

Four short links: 4 March 2014

It's Complicated, Solid World, Bitcoin Redux, and CS Papers

  1. It’s Complicated — Danah Boyd’s new book on teens use of the online world is available for PDF download (but buy a copy anyway!).
  2. Building a Solid World — O’Reilly research paper about the “software-enhanced networked physical world”. Gonna be mighty interesting in a world where our stuff knows more and is better connected than its owners.
  3. What Did Not Happen at Mt Gox — interesting analysis of some of the popular theories. Overall, Bitcoin has been an ongoing massive online course on economics and distributed systems for the libertarian masses. It’s ironic that Mt. Gox turned into a chapter on fractional reserve banking.
  4. Papers We Love (Github) — a collection of papers from the computer science community to read and discuss.
Comment |
Four short links: 3 March 2014

Four short links: 3 March 2014

Vanishing Money, Car Hackery, Data Literacy Course, and Cheaper CI

  1. The Programming Error That Cost Mt Gox 2609 Bitcoins — in the unforgiving world of crypto-currency, it’s easy to miscode and vanish your money.
  2. Ford Invites Open-Source Community to Tinker AwayOne example: Nelson has re-tasked the motor from a Microsoft Xbox 360 game controller to create an OpenXC shift knob that vibrates to signal gear shifts in a standard-transmission Mustang. The 3D-printed prototype shift knob uses Ford’s OpenXC research platform to link devices to the car via Bluetooth, and shares vehicle data from the on-board diagnostics port. Nelson has tested his prototype in a Ford Mustang Shelby GT500 that vibrates at the optimal time to shift.
  3. Making Sense of Data — Google online course on data literacy.
  4. Cost-Efficient Continuous Integration at Mozilla — CI on a big project can imply hundreds if not thousands of VMs on Amazon spinning up to handle compiles and tests. This blog post talks about Mozilla’s efforts to reduce its CI-induced spend without reducing the effectiveness of its CI practices.
Comment |
Four short links: 25 February 2014

Four short links: 25 February 2014

MtGox Go Boom, Flappy Bird, Air Hockey Hack, and Robo Lab

  1. Bitcoin Markets Down — value of bitcoins plunges as market uncertain after largest bitcoin exchange goes insolvent after losing over 750k bitcoins because they didn’t update their software after a flaw was discovered in the signing of transactions.
  2. Flappy Bird for the Commodore 64 — the 1980s games platform meets the 2014 game. cf the machine learning hack where the flappy bird learns to play the game successfully.
  3. Air Hockey Robot — awesome hack.
  4. Run 30 Lab Tests on Only One Drop of Blood — automated lab processing to remove the human error in centrifuging, timing, etc. that added to variability of results.
Comment: 1 |

Bitcoin security model: trust by computation

A shift from trusting people to trusting math.

Bitcoin is a distributed consensus network that maintains a secure and trusted distributed ledger through a process called “proof-of-work.” Bitcoin fundamentally inverts the trust mechanism of a distributed system. Traditionally, as we see in payment and banking systems, trust is achieved through access control, by carefully vetting participants and excluding bad actors. This method of trust requires encryption,…
Read Full Post | Comments: 23 |
Four short links: 14 February 2014

Four short links: 14 February 2014

Bitcoin Analysis, 3D Crime Scenes, 3D Display, and Cloud API

  1. Bitcoin: Understanding and Assessing Potential Opportunities (Slideshare) — VC deck on Bitcoin market and opportunities, long-term and short-term. Interesting lens on the development and gaps.
  2. Queensland Police Map Crime Scenes with 3D Scanner (ComputerWorld) — can’t wait for the 3D printed merchandise from famous trials.
  3. Atheer LabsAn immersive 3D display, over a million apps, sub-mm 3D hand interaction, all in 75 grams.
  4. libcloudPython library for interacting with many of the popular cloud service providers using a unified API.
Comments: 2 |
Four short links: 13 February 2014

Four short links: 13 February 2014

Open Web Ranking, Quantified Self Gadgets, Armband Input, and Bitcoin Exchanges Threatened

  1. The Common Crawl WWW Ranking — open data, open methodology, behind an open ranking of the top sites on the web. Preprint paper available. (via Slashdot)
  2. Felton’s Sensors (Quartz) — inside the gadgets Nicholas Felton uses to quantify himself.
  3. Myo Armband (IEEE Spectrum) — armband input device with eight EMG (electromyography) muscle activity sensors along with a nine-axis inertial measurement unit (that’s three axes each for accelerometer, gyro, and magnetometer), meaning that you get forearm gesture sensing along with relative motion sensing (as opposed to absolute position). The EMG sensors pick up on the electrical potential generated by muscle cells, and with the Myo on your forearm, the sensors can read all of the muscles that control your fingers, letting them spy on finger position as well as grip strength.
  4. Bitcoin Exchanges Under Massive and Concerted Attack — he who lives by the network dies by the network. a DDoS attack is taking Bitcoin’s transaction malleability problem and applying it to many transactions in the network, simultaneously. “So as transactions are being created, malformed/parallel transactions are also being created so as to create a fog of confusion over the entire network, which then affects almost every single implementation out there,” he added. Antonopoulos went on to say that Blockchain.info’s implementation is not affected, but some exchanges have been affected – their internal accounting systems are gradually going out of sync with the network.
Comment |