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about:how 2005/08/10 06:01 about:how 2005/09/22 03:17 current
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=====How does it work?===== =====How does it work?=====
-The jfish Project aims to leverage the ubiquity of low-cost yet high-power notebook computers, allowing the use of specialist electronics to be minimised by performing the majority of signal processing in software alone.+The jfish project aims to leverage the ubiquity of low-cost yet powerful semiconductors, free software/open source development tools, and the coming revolution of [[http://en.wikipedia.org/wiki/Fab_lab|personal fabrication]], to improve worldwide access to safe and reliable anaesthetic monitoring. Affordable mass-produced [[http://en.wikipedia.org/wiki/Microcontroller|microcontrollers]] allow the use of specialised electronic components to be minimised in the design of jfish devices, as the majority of signal processing is able to be performed in software alone. This focus on software facilitates updating, extension and improvement of the devices.
=====Project hardware is modular by design===== =====Project hardware is modular by design=====
-Hardware modules will be little more than instrumental/isolation amplifiers, with minimal hardware signal processing performed. The PC soundcard found in all recent notebook computers provides a ready made analogue-to-digital converter and an elegant method of signal acquisition. Most signal processing will then take place digitally within the computer, limited only by the Project software and the available computing power. Extension, improvement and updating of the system are then as simple as downloading the latest software update.+A complete anaesthetic workstation will consist of standalone hardware modules networked together and integrated with a low-cost commodity notebook computer. Each module will also continue to function in isolation as a medical monitor. Thus if only a pulse oximeter is required, only the jfish pulse oximeter device need be used. This also allows development to focus on individual devices as determined by the priority of access to such a monitor for world anaesthesia practice.
{{ about:hardware.jpg }} {{ about:hardware.jpg }}
-Using a notebook computer as the central module of the system offers significant advantages:+Use of a monitor as a component of a workstation will therefore add functionality to the system as a whole, but does not restrict the simplicity and utility of the monitor as a stand alone device. Similarly, as each monitor can function in isolation, the whole system is significantly robust. A malfunction in one module will not effect the functioning of another module - the system thus //fails elegantly//. This is incrediby important for medical equipment designed for use in challenging environments.
-  * Access to personal computers and associated maintenance is readily available in most two-thirds world countries (relative to access to anaesthetic monitoring technologies).+Extension, improvement and updating of the system will be as easy as downloading the latest software or device firmware from the project website. The modular nature of the design allows for easy customisation of different components, such as a user interface, by an interested individual.
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 +Using a notebook computer as the central module of a complete anaesthetic workstation offers significant advantages:
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 +  * Access to personal computers and associated maintenance is readily available in most developing countries (relative to access to anaesthetic workstations).
  * Western countries are large consumers of notebook computers providing a ready market of legacy, low-cost, high-power, used computers. A suitably powered notebook computer will cost US$200-400.   * Western countries are large consumers of notebook computers providing a ready market of legacy, low-cost, high-power, used computers. A suitably powered notebook computer will cost US$200-400.
  * Notebook computers are designed to operate from battery power and are easily adapted to run from a variety of power sources, including vehicle batteries or solar cells.   * Notebook computers are designed to operate from battery power and are easily adapted to run from a variety of power sources, including vehicle batteries or solar cells.
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  * Most importantly, the notebook provides a uniform and consistent platform throughout the world.   * Most importantly, the notebook provides a uniform and consistent platform throughout the world.
-Both the hardware and software design will be modular in nature, allowing easy addition or removal of hardware modules (ie. ECG, SpO2, ETCO2, etc.) as needed. Similarly, new software modules (eg. ST-segment analysis, arrhythmia detection, networking) can be quickly ‘plugged-in’ to further extend the functionality, or removed to simplify the monitor as required.+The modular design of hardware and software will allow easy addition, removal or design of hardware modules as needed. Similarly, new software modules (eg. ST-segment analysis, arrhythmia detection, networking, data-logging) can be quickly ‘plugged-in’ to further extend the functionality, or removed to simplify the monitor, as required for local needs.
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-The provision of detailed design notes and software source code allows adaptation and improvement by any interested party, provided all such improvements are re-released to the community and licensed in the same way as the Project code itself.+
 +The provision of detailed design notes and software source code allows adaptation and improvement by any interested party, provided all such improvements are re-released to the community and licensed under the same [[:Legal:Licensing|license]] as the original work from the jfish project.

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