After an looking back at the history of Eclipse OHF and its parts, we're going to learn what happened to them and why. Beside those going a different path, mainly Open Health Tools (OHT) we take a closer look at the Legacy of OHF at Eclipse, mainly The Spatiotemporal Epidemiological Modeler (STEM) and Units of Measurement support from UOMo and related standards like the Unified Code for Units of Measure (UCUM)

1. The OHF Legacy
Eclipse UOMo, STEM and Open
Health Tools
Werner Keil
Eclipse Day Kraków
13th September 2012

2. UOMo STEM Open Health Tools
2 © 2007-2012 Creative Arts & Technologies Images based on © Universal Pictures

3. Overview
• Introduction
• UOMo
• Type-Safety
• Why do we need it?
• Unit-API, UOMo
• Units and Healthcare
• UCUM, HL7, used by Healthcare
• STEM
• What is STEM?
• New Features
• Demo
• Open Health Tools
• Q&A
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4. Who am I?
Werner Keil
• Consultant – Coach
• Creative Cosmopolitan
• Open Source Evangelist
• Software Architect
• Java Godfather
• UOMo Project Lead
• …
Twitter @wernerkeil
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5. Type-Safety
• Java does not have strongly typed primitive types
(like e.g. Ada language).
• For performance reasons most developer prefer
primitive types over objects in their interface.
• Primitives type arguments often lead to name
clashes (methods with the same signature)
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6. What do these disasters have in common?
• Patriot Missile
The cause was an inaccurate calculation of the
time since boot due to a computer arithmetic error.
• Ariane 5 Explosion
The floating point number which a value was
converted from had a value greater than what
would be represented by a 16 bit signed integer.
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7. What do these disasters have in common?
• Gimli Glider (near disaster)
Fuel loading was miscalculated through misunderstanding of the
recently adopted Metric System, replacing the Imperial System
• Mars Orbiter
Preliminary findings indicate that one team used English units (e.g.
inches, feet and pounds) while the other used metric units for a key
spacecraft operation.
• NASA lost a $125 million Mars orbiter because a Lockheed Martin engineering team used
English units of measurement while the agency's team used the more conventional metric
system for a key spacecraft operation
• A credible source disclosed, there was a manual step with an outsourced person to convert
these calculations between the different teams, and NASA budget cuts caused them to fire
him and have the wrong, unpatched data transmitted!!!
• This also underlines the added risk when 3 rd party contractors are involved or projects are
developed Offshore
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8. NASA “Star Wars” Initiative, 1983
23rd March 1983. Ronald Reagan
announces SDI (or “Star Wars”): ground-
based and space-based systems to
protect the US from attack by strategic
nuclear ballistic missiles.
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9. 1985
Mirror on underside of SDI Experiment:
shuttle
The Plan
Big mountain in Hawaii
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10. 1985
SDI Experiment:
What really
happened
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11. 1985: What happened?
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12. Unit Tests wouldn„t find these…
Despite their name
• All previous example illustrate three categories of
errors difficult to find through Unit Testing:
• Interface Errors (e.g. millisecond/second, radian/degree, meters/feet).
• Arithmetic Errors (e.g. overflow).
• Conversion Errors.
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13. Causes of Conversion Errors
• Ambiguity on the unit
• Gallon Dry / Gallon Liquid
• Gallon US / Gallon UK
• Day Sidereal / Day Calendar
• Degree Celsius / Degree Fahrenheit
• Did you know that Gabriel Fahrenheit was born in Gdansk (Danzig) in northern
Poland?
• ...
• Wrong conversion factors:
static final double PIXEL_TO_INCH = 1 / 72;
double pixels = inches * PIXEL_TO_INCH
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14. Eclipse UOMo
One Small Step…

15. Unit-API | Operations
Results with
Same Dimension Different Dimension
Binary Operations Binary Operations
add(double) or (long) root(int)
multiply(double) or (long) power(int)
divide(double) or (long) multiply(Unit)
compound(Unit) divide(Unit)
Unary Operations
inverse()

16. Eclipse UOMo
Bundles
• UOMo currently consists of
• UOMo Core
• General parts of the framework, reusable components
• UOMo Util
• Utility classes, Formatting, Date/Time and other ICU4J or Unicode
related items
• UOMo XML
• XMLPull and support for Markup Languages like UnitsML, MathML
or SensorML
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17. Eclipse UOMo
Bundles (2)
• UOMo Units
• Based on Units of Measurement API
• UOMo UCUM
• Unified Code for Units of Measure support
• UOMo Business
• Business Types and Monetary System
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18. UOMo UCUM
Unified Code for Units of Measure
The Unified Code for Units of Measure is inspired by
and heavily based on
• ISO 2955-1983
• ANSI X3.50-1986
• HL7's extensions called ISO+
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19. HL7 DSL
def mySegment = ... // assignment to another
NK1 segment instance
def group = message.PATIENT_RESULT(0).PATIENT
group.NK1(0) = 'abc' // syntax error!
msg1.NK1(0) = mySegment // syntax error!
msg1.NK1(0).from(mySegment) // works!
def nk1 = message.PATIENT_RESULT(0).PATIENT.NK1(0)
def otherNk1 = message.PATIENT_RESULT(0).PATIENT.NK1(0)
nk1[4] = otherNk1[4] // copy address
nk1[4][4] = otherNk1[4][4] // copy state or province
only
nk1[4][4].from(otherNk1[4][4])// equivalent
nk1[4][4] = 'NY' // set state or province directly
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20. UOMo Examples
DEMO

21. STEM is Open Source
http://www.eclipse.org/stem/downloads.php

22. STEM is a Framework
Epidemiological Compartment Models
Standard SEIR model Standard SIR model
Births Births
S E I R S I R
Deaths Deaths
S: susceptible
E: exposed but not yet infectious
I: infectious
R: recovered

23. The Many Vectors of Infectious Disease
Human Flu Swine Flu
“Mixing Cell

24. US Counties (3109) Edges
Common
Border Edges
Interstate Highway
Edges
Air Travel Edges

25. Goal: Evaluation of Public Health Policies
Masks
No Air travel
HCN/HL7
Weather Vaccinate
Air Traffic
Masks/No Air
Multiple parallel scenarios identically initialized
from current real world conditions and simulate
each simultaneously forward in time. ?

26. Simulations Based on ICDC Influenza Data
as initial condition

27. Recent H1N1 Outbreak

28. STEM in Action
DEMO

29. VISION OF OPEN HEALTH TOOLS
Vision:
To enable a ubiquitous ecosystem where members of
the Health and IT professions can collaborate to build
open, standards-based interoperable systems that
enable patients and their care providers to have
access to vital and reliable medical information at the
time and place it is needed.

30. OHT | Stakeholder Communities
Community of Health
Professionals
Community of National Community of Vendors
Health Services Consumers
Providers
Patients
Community of Regional,
State and Local Physicians Community of Open Source
Health Services Technology Developers
Community of Standards
Organizations

31. OHT | Approach to Standards
Strategy:
■ Adopt recognized industry standards and best practices in services.
 Maintain close working relationships with identified SDOs
 Provide feedback to SDOs via early adopter program and communities to
foster creation of useful, usable healthcare standards that address real
healthcare requirements.
Important SDOs:
■ HL7: CCD, Semantics, Documents, Services
■ OMG: technical specifications of services
■ IHE: pragmatic community for adoption
■ IHTSDO (SNOMED): Semantics, terminology definitions for healthcare
■ ASTM: CCR / CCD specifications
■ ISO/CEN/HL7: EHR requirements and specifications
■ ISO

32. OHT | Clinical Application Layers
Business Use Case
Clinical Use Case
Clinical Content Model
Application Design
Clinical Templates
Clinical Archetypes
Reference Model, Types, Terminology

33. OHT | Based upon Eclipse Experience
The Eclipse Eco-system
Eclipse Open Source Community The community takes the Open Source Technology and
build products for profit and use.
The community includes 800,000 vendors and
Eclipse Foundation organizations, 10 Leadership Projects, 150 Members, in
120 countries project.
The economic value of the “free” code is $700,000,000
Eclipse Eco-system (USD). The commercial value of the revenue generated
to members is in excess of 2 Billion (USD)
The Eclipse Open Source The Eclipse Foundation
Enable & Manage Eclipse
The community builds the technology
has over 4 million developers and 120 open source projects. These -Infrastructure Support
projects can be conceptually organized into seven different "pillars" or -Intellectual Property
categories:
-Legal
-Enterprise Development
-Marketing
-Embedded and Device Development
-Rich Client Platform -Enable Eco-system
-Rich Internet Applications -Enable Open Source
-Application Frameworks
-Application Lifecycle Management (ALM)
-Service Oriented Architecture (SOA)

34. OHT | Communities
Open Health Tools
Open Source Community
Open Health Tools
Private Public Non-Eclipse
Eco-system
Commercial Open
Applications Source
Code & Data Eclipse Open Source Community Community
Eclipse Eco-system
The Open Health Tools Open Source The Open Health Tools Eco-system
The community builds common services, frameworks, The community takes the Open Health Tools
exemplary tools and example applications. Technology and builds, packages, and sells the
For example: technology as products, applications, tools, for
Record Locator Services & Hl7 Messaging profit and use.
Terminology Services & Identity Management

35. Let„s talk
Q&A

36. Links
Eclipse – Project UOMo
http://www.eclipse.org/uomo/
Units of Measurement API
http://www.unitsofmeasurement.org
UCUM
http://www.unitsofmeasure.org

37. Links (2)
Eclipse STEM
http://www.eclipse.org/stem
Open Health Tools
http://www.openhealthtools.org/
OpenHealth Project
http://www.openhealth.org

38. Contact
werner@catmedia.us
or
uomo@catmedia.us
Twitter: @wernerkeil
Hashtag #EclipseUOMo