Working with Parity we’ve been developing innovative social media analytics using big data, unsupervised ML and NLP.

Parity works with some of the UK’s biggest public and private sector organisations to unlock the value of their data. We worked as an R&D partner with them to develop an innovative new social media analytics product

The product builds on academic research techniques used to identify communities of interest on Twitter based on their conversations. The problem with the existing technique is that it doesn’t scale to the kind of complexity found in social networks — data on Twitter is massive and understanding conversations quickly becomes an exponential problem space.

Starting with an early proof of concept we iterated…


Working with Danone we created a conversational AI companion for parents that significantly reduces the average diagnosis time for Cow’s Milk Allergy (CMA) in infants.

It takes an average of 11 GP visits and 15 weeks from initial symptoms to a diagnosis of cows milk allergy, causing a lot of unnecessary distress for both parent and child.

We developed a conversational AI on Facebook, acting as a companion for parents throughout this journey, helping them to track symptoms and produce a comprehensive report to take to the GP. This significantly reduces the average diagnosis time for CMA.

Designing the conversation was a collaborative design process involving end users, health care professionals, compliance people, and our copywriters and UX people who understand how to create good…


Working with the NHS on open data visualisation to enable clinicians to make sense of healthcare indicators

NHS Digital collects, processes and publishes data covering all levels of the UK’s National Health Service. National healthcare data is truly big data and NHS wanted to make it public, transparent and accessible.

There are multiple challenges here: dealing with large quantities of data, dealing with sensitive information and visually transforming raw data into insight.

Many of the clinical indicators involve sensitive data, either because they are official national statistics (e.g. hospital-level mortality), have embargo dates, or require granular masking to ensure individual privacy isn’t compromised.

We created an open source technology stack and integrated this tightly with our own…


Our World in Data have corrected errors in WHO statistics

Health care professionals are the real heroes of the moment but there is an important role for data scientists to play in the fight against the pandemic.

Your first port of call should be the COVID-19 Open Research Dataset — released on 20th March by the White House and a coalition of leading research groups. …


MythX (previously Mythril) recently made the decision to drop their custom token and move to a stablecoin-based subscription payment system. Bernhard already posted a good overview of the reasoning behind this decision but I’d like to add some background on how we used simulations to help us understand the dynamics of and issues with the token model. By way of disclaimer, I’m an advisor to MythX and co-creator of the Economy.os tool.

In this post I’ll describe some of the simulations that we ran, explaining our methodology, sharing some results and recommendations for anyone who is thinking about adopting a…


Introducing a dynamic bonding curve token model

Utility tokens have received a lot of bad press recently, and for good reason. Many ICOs that sold utility tokens seem to have massively over-estimated the supply of tokens required for normal usage of their networks. The price of these tokens has been supported by speculative investors who presumably didn’t give much thought to the fact that they were not designed to function as a store of value and will likely be sold in return for usage as soon as they’re purchased by legitimate users, resulting in what is now commonly referred to as the velocity problem.

We argue that…


These updates are based on the discussions between the working group for ERC948 — a standard for recurring payments on Ethereum that is currently in development. I will endeavour to focus on the ideas that are being discussed and not on who said what, however I will also express my opinion!

Hopefully these updates will assist anyone who is interested in following the progress of the standard and will encourage a broad range of input. I’m also expecting that they will help me to formulate my views more clearly!

Purpose of the standard

As this is the first update post, let’s address why we…


What if all our software licenses were compatible and we could go to a single integrated app store and sell say three days of Adobe Creative Cloud and buy two days of Microsoft Office? This flexibility would be a clear win for consumers but would surely lead to a loss of revenue for software vendors. Hmm, but what if this easy transferability of licenses also reduced piracy?

In this post we present a simple proof of concept, representing software licenses as ERC721 tokens on the Ethereum blockchain, and using Metamask to passwordlessly log in to a web app by proving…


OpenSign is a free, decentralized alternative to products like DocuSign and Adobe Sign. It allows you to make agreements without requiring any trusted third party to keep track of your documents and signatures.

td;dr: The OpenSign dapp is currently an MVP, you can try it yourself now if you have some Ethereum and your browser has MetaMask installed.

How does it work

We’ve tried to make the process of creating multi-party agreements as simple as possible, but you will need some experience of using Ethereum and Metamask for any of this to make sense. …


LastSeen is a simple Facebook Messenger Bot that asks the user to check-in once a day and notifies their designated contact if they don’t.

The project is a collaboration between Atchai and Tom Hewitson. Tom’s father passed away last year. Once the initial shock had subsided he found himself often worrying about his mum now that she was on her own. As he was calling to check in on her every day he had the idea for LastSeen.

The product was designed initially for older people living alone, providing them with a daily reminder that someone cares about them, and…

John Griffin

Tech entrepreneur and experimenter. Founder @atchai. Player of improvised music. Living in London, mostly.

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