I described how Google’s Chromecast device works in my previous article.  In this article, I’ll explain how to use the new Chromecast extensions for EWD.js to build your own Chromecast applications. Preparation The first thing you’ll need to do is install EWD.js or, if you’re already using EWD.js, update it to Build 54.10 or later. […]

Google launched the $35 Chromecast into the US market in July 2013 and it became available in the UK in March 2014.  It’s primarily marketed as a device for streaming video to your TV, and, as such, is usually compared with the Roku streamer, Apple TV and the new Amazon Fire TV. Once you look […]

As soon as you venture into the world of browser-based and Web Services-based architectures, you quickly realise that, unless you think things through very carefully, it’s a potential security nightmare.  You’re exposing databases containing sensitive data to the equivalent of the Wild West: a multitude of people who are apparently hell-bent on causing havoc either […]

Before I begin, for the benefit of those of you who are new to the world of Health IT, let me explain one bit of the jargon: EHR: An Electronic Healthcare Record – in other words, a computer system designed for managing and recording information relating to the treatment of patients within hospitals and/or community […]

Dr Tony Shannon, in his presentations on NHS VistA, has often remarked that what is needed is an Open Source, hackable Electronic Healthcare Record (EHR) platform.  If such a platform became available, packaged in a such way that any interested Open Source developer (or, dare I say, hacker) could fire it up, dig into it […]

In this final article in the series on the integration of EWD.js and VistA using Christopher Edwards’ OSEHRA Installer, I want to introduce what I believe is a critically important new component: a JavaScript-based VT-100 terminal emulator that can run within a browser.  This is integrated with a back-end Node.js module that acts as a […]

This article is the fourth in the series that describes the EWD.js / VistA environment that is created by running Christopher Edwards’ OSEHRA installer.  In this article I’m going to focus on the REST interface that will have been installed and made ready for use, and show how it makes use of the same back-end […]