Subrata Bhattacharjee and Christopher Paolini

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A Cyber-Based Collaborative Framework for
Thermodynamic Education and Research

• Subrata Bhattacharjee and Christopher Paolini
• Mechanical Engineering Department
• San Diego State University

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Outline

• Demonstration of TEST (thermofluids.net) as an
  educational tool.
• How such a tool used by thousands of students,
  educators, and professionals can benefit from the
  cyber infrastructure.
• Web service and how our work can benefit the
  educational and research community
• Ongoing and future work

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TEST The Expert System for Thermodynamics

• A web based educational tool for students,
  educators, and professionals.
• It is a cross-platform visual environment for
  solving thermodynamic problems and pursuing
  what-if scenarios.
• It has a large user base more than 1000
  registered educators, and 10,000 students and
  professionals.
• It is freely accessible to all academic
  institution.

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TEST Home Page - thermofluids.net
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Multimedia Problems
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A Large Selection of Solvers (Daemons)
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Simplification
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The Open Steady Daemon
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A Combustion Problem
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Open Steady Combustion Daemon
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Equilibrium Daemon Set Up Species
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Equilibrium Daemon Evaluate States
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Equilibrium Daemon Products Composition
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A Framework for Community Computing

• Convert stand-alone application into
  client/server and ultimately to peer-to-peer
  model improve speed.
• Users can contribute new data and make it
  immediately available to others.
• Web service for speed distributed parallel
  computing in a grid.
• Web service for versatile use of our code.
  Published through WSDL and located by UDDI, your
  computer may find our publicly available methods
  and data on equilibrium. Like the peer-to-peer
  song search.

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Standalone Software Architecture

• The old way provide self-contained software
  applications to end users.
• Inflexible new and experimental thermo-chemical
  data can not be added by one remote user and used
  by another remote user in real time.

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Service Oriented Architecture (SOA)

• Service Oriented Architectures extend the
  benefits of object oriented programming to the
  network - reusability, flexibility,
  interoperability, scalability.

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Client/Web Service Communication
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UDDI Web Service Discovery
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Web Services Technologies and Tools

• An abundance of tools and technologies exist for
  the development of collaborative, networked
  engineering applications using Web Services

Web Server, J2SE, Apache Axis, etc.
Web Service Layer
Java Equilibrium Codes, IDE, etc.
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Conclusions

• TEST is freely accessible from www.thermofluids.ne
  t
• Equilibrium daemon is one of the many
  thermodynamic calculators (applets).
• Ability for user to upload data and make it
  available to others work in progress.
• Extend the codes to include multiple phases
  future plan.
• Migrate to web service architecture for speed and
  community computing future plan.

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Web Service Related Abbreviations

• XML standard language for describing data that
  is exchanged over a network.
• SOAP a protocol based on XML for transmitting
  data in a distributed computing environment.
• JAX-RPC a freely available Java API that allows
  a Java client to call web service methods in a
  distributed computing environment using SOAP
  based XML messages. Hides the complexity of SOAP
  from the developer. Automatically generates the
  proper SOAP message when invoking a remote method
  from a web service. Provides a mapping tool
  named wscompile that automatically generates the
  WSDL file from a JAX-RPC service definition.
• SAAJ a freely available Java API for generating
  and sending SOAP messages. Used by JAX-RPC to
  create and send SOAP messages synchronously (send
  and wait for reply) or asynchronously (send and
  continue).
• JAXP a freely available Java API for processing
  XML documents.
• JAXR a freely available Java API for accessing
  UDDI registries. Used by clients to discover web
  services by querying JAXR providers. JAXR
  providers then query registry providers who
  respond back to the JAXR provider. The JAXR
  provider transforms the registry provider
  response into a JAXR compliant response so it can
  be interpreted by the JAXR client.
• JAXB a freely available Java API that provides a
  mapping from an XML document to a set of Java
  classes and interfaces based on the XML
  document's schema. A benefit for developers
  since JAXB enables an application to operate with
  Java content and not with XML data.
• WS-Security provides security enhancements such
  as authentication and integrity in SOAP messages
  sent between a client and web service.