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You searched for +publisher:"University of New South Wales" +contributor:("Liu, Yan, Pacific Northwest National Laboratory"). Showing records 1 – 2 of 2 total matches.

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University of New South Wales

1. Phoomvuthisarn, Suronapee. An architecture-based approach to interfacing a market-based model in trust-based service systems.

Degree: Computer Science & Engineering, 2011, University of New South Wales

The Reputation-Based Trust mechanism helps a service assess the trustworthiness of offered services, based on the feedback obtained from their users. However, in the absence of appropriate safeguards, service users can manipulate this feedback, and existing attempts to encourage truthful feedback fail when the majority of users are potentially dishonest. Existing approaches also suffer from a lack of suitable distributed architectures to support their integration within trust systems, so that their overhead costs may be excessive. This thesis proposes novel distributed architectures for interfacing an auction mechanism (one that has already addressed the problem of manipulation by market-trading participants) with trust systems. These architectures will discourage users from giving untruthful feedback and minimize overhead costs in integrating the mechanism into trust systems.This research follows an empirical research methodology that uses case studies inspired by real-world scenarios in Service-Oriented Computing (SOC). The research solution has two aspects: it proposes a technique for mapping the concepts of auction theories from economics into trust-based domains; and it draws on the concepts of an architecture-based approach to facilitate the integration of auction components within existing trust components. This facilitation aims to achieve architectural properties for interfacing: extensibility, to keep trust systems’ normal functionalities when they are enhanced with the auction mechanism's capabilities; scalability, to ensure highly scalable trust systems; decentralization, to capture an auction's truth-telling property in fully distributed environments such as SOC; and performance, to ensure an affordable response time while achieving scalability. The research solution is evaluated through three case studies, namely centralized, decentralized and hybrid computing. Each of these case studies is progressively built up from the architecture of the previous case, thus permitting comparative analysis of: (1) the feasibility of utilizing the mechanism in trust-based domains; and (2) the architecture supporting the mechanism based on architectural properties for interfacing. The analysis is based on metrics including users’ utility gains, CPU and memory usage, and a system's response time.The contributions to research are the proposed mapping technique and the three architectures (one for each case study) supporting the integrated auction mechanism. A trust-based engine with an integrated auction mechanism is implemented to support the approach. The case-study results demonstrate that the architectures can ensure truthful reporting by users even when up to 90% of them are dishonest. In centralized computing, it can achieve architectural solutions regarding extensibility with less significant overhead (increases of 5% in CPU usage, 1.93% in memory usage, and 6% in response time); in decentralized computing, it can achieve both scalability (three times higher performance compared to centralized computing… Advisors/Committee Members: Zhu, Liming, Computer Science & Engineering, Faculty of Engineering, UNSW, Liu, Yan, Pacific Northwest National Laboratory, Tosic, Vladimir, National ICT Australia, Jeffery, Ross, Computer Science & Engineering, Faculty of Engineering, UNSW.

Subjects/Keywords: Economic mechanisms; Trust systems; Software architecture

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Phoomvuthisarn, S. (2011). An architecture-based approach to interfacing a market-based model in trust-based service systems. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/51507 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:10194/SOURCE02?view=true

Chicago Manual of Style (16th Edition):

Phoomvuthisarn, Suronapee. “An architecture-based approach to interfacing a market-based model in trust-based service systems.” 2011. Doctoral Dissertation, University of New South Wales. Accessed August 18, 2019. http://handle.unsw.edu.au/1959.4/51507 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:10194/SOURCE02?view=true.

MLA Handbook (7th Edition):

Phoomvuthisarn, Suronapee. “An architecture-based approach to interfacing a market-based model in trust-based service systems.” 2011. Web. 18 Aug 2019.

Vancouver:

Phoomvuthisarn S. An architecture-based approach to interfacing a market-based model in trust-based service systems. [Internet] [Doctoral dissertation]. University of New South Wales; 2011. [cited 2019 Aug 18]. Available from: http://handle.unsw.edu.au/1959.4/51507 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:10194/SOURCE02?view=true.

Council of Science Editors:

Phoomvuthisarn S. An architecture-based approach to interfacing a market-based model in trust-based service systems. [Doctoral Dissertation]. University of New South Wales; 2011. Available from: http://handle.unsw.edu.au/1959.4/51507 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:10194/SOURCE02?view=true


University of New South Wales

2. Xu, Xiwei. A resource-oriented architecture for business process systems.

Degree: Computer Science & Engineering, 2011, University of New South Wales

Background: The REpresentational State Transfer (REST) design principles treat all concepts in the world as link-connected resources, and support ROA (Resource-Oriented Architecture) for the Web applications. REST and ROA are responsible for the adaptability achieved in the Web. Some design approaches of Web-based business process systems recently evolved towards RESTful to inherit adaptability. However, none of the approaches can improve the adaptability of the produced systems. Aims: Propose a systematic approach for design and execution of Web-based business processes to improve adaptability of the produced systems. Methods: This research followed an empirical research methodology, which evaluates research solutions with real-world cases. On one hand, the research solution was derived by 1) tailoring the REST principles towards business process systems; 2) proposing REST annotations on existing business process modelling; 3) mapping the concepts of business process to HTTP/URI specifications; and 4) designing a format for process context information. On the other hand, the research solution was evaluated through three real-world case studies. Two of the case studies conducted comparative analysis in terms of adaptability of the systems produced by the proposed approach and two alternatives, namely, SOA and MEST (MESsage Transfer). The analysis is based on metrics, including LOC difference, change locality, coupling and cohesion, and an analysis framework called BASE.Results: The research solution is ROA4BP, which includes 1) an architecting approach for design and implementation of Web-based business processes to provide a development guideline; 2) a set of REST-related annotations on existing process modelling to ensure the compatibility with existing techniques; 3) A systematic mapping between business process and HTTP/URI specifications to utilize the advanced mechanisms provided by the Web infrastructure; and 4) a communication format to exchange structured process context information during runtime among process participants. A modelling tool, a programming API and a runtime engine were implemented to support the approach and simplify the implementation of case studies. The case studies demonstrated that ROA4BP can produce more adaptable business process systems compared to the other two alternatives.Conclusion: ROA4BP can help to design and execute RESTful business process systems with better adaptability at design-time and runtime. Advisors/Committee Members: Zhu, Liming, Computer Science & Engineering, Faculty of Engineering, UNSW, Jeffery , Ross, Computer Science & Engineering, Faculty of Engineering, UNSW, Liu, Yan, Pacific Northwest National Laboratory.

Subjects/Keywords: Business process; REST; ROA; Adaptability

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Xu, X. (2011). A resource-oriented architecture for business process systems. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/51315 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:9996/SOURCE02?view=true

Chicago Manual of Style (16th Edition):

Xu, Xiwei. “A resource-oriented architecture for business process systems.” 2011. Doctoral Dissertation, University of New South Wales. Accessed August 18, 2019. http://handle.unsw.edu.au/1959.4/51315 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:9996/SOURCE02?view=true.

MLA Handbook (7th Edition):

Xu, Xiwei. “A resource-oriented architecture for business process systems.” 2011. Web. 18 Aug 2019.

Vancouver:

Xu X. A resource-oriented architecture for business process systems. [Internet] [Doctoral dissertation]. University of New South Wales; 2011. [cited 2019 Aug 18]. Available from: http://handle.unsw.edu.au/1959.4/51315 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:9996/SOURCE02?view=true.

Council of Science Editors:

Xu X. A resource-oriented architecture for business process systems. [Doctoral Dissertation]. University of New South Wales; 2011. Available from: http://handle.unsw.edu.au/1959.4/51315 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:9996/SOURCE02?view=true

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