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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 [email protected] NSF Workshop on Cyber Infrastructure in Combustion Science April 19-20, 2006 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 [email protected] NSF Workshop on Cyber Infrastructure in Combustion Science April 19-20, 2006 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. [email protected] NSF Workshop on Cyber Infrastructure in Combustion Science April 19-20, 2006 TEST Home Page - thermofluids.net [email protected] NSF Workshop on Cyber Infrastructure in Combustion Science April 19-20, 2006 Multimedia Problems [email protected] NSF Workshop on Cyber Infrastructure in Combustion Science April 19-20, 2006 A Large Selection of Solvers (Daemons) [email protected] NSF Workshop on Cyber Infrastructure in Combustion Science April 19-20, 2006 Simplification [email protected] NSF Workshop on Cyber Infrastructure in Combustion Science April 19-20, 2006 The Open Steady Daemon [email protected] NSF Workshop on Cyber Infrastructure in Combustion Science April 19-20, 2006 A Combustion Problem [email protected] NSF Workshop on Cyber Infrastructure in Combustion Science April 19-20, 2006 Open Steady Combustion Daemon [email protected] NSF Workshop on Cyber Infrastructure in Combustion Science April 19-20, 2006 Equilibrium Daemon – Set Up Species [email protected] NSF Workshop on Cyber Infrastructure in Combustion Science April 19-20, 2006 Equilibrium Daemon – Evaluate States [email protected] NSF Workshop on Cyber Infrastructure in Combustion Science April 19-20, 2006 Equilibrium Daemon – Products Composition [email protected] NSF Workshop on Cyber Infrastructure in Combustion Science April 19-20, 2006 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. [email protected] NSF Workshop on Cyber Infrastructure in Combustion Science April 19-20, 2006 Standalone Software Architecture • The “old” way: provide self-contained software applications to end users. • Inflexible: new and experimental thermochemical data can not be added by one remote user and used by another remote user in real time. [email protected] NSF Workshop on Cyber Infrastructure in Combustion Science April 19-20, 2006 Service Oriented Architecture (SOA) • Service Oriented Architectures extend the benefits of object oriented programming to the network reusability, flexibility, interoperability, scalability. [email protected] NSF Workshop on Cyber Infrastructure in Combustion Science April 19-20, 2006 Client/Web Service Communication [email protected] NSF Workshop on Cyber Infrastructure in Combustion Science April 19-20, 2006 UDDI: Web Service Discovery [email protected] NSF Workshop on Cyber Infrastructure in Combustion Science April 19-20, 2006 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. [email protected] NSF Workshop on Cyber Infrastructure in Combustion Science April 19-20, 2006 Conclusions • TEST is freely accessible from www.thermofluids.net • 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. [email protected] NSF Workshop on Cyber Infrastructure in Combustion Science April 19-20, 2006 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. [email protected] NSF Workshop on Cyber Infrastructure in Combustion Science April 19-20, 2006