Pub Date : 2009-06-01DOI: 10.1109/DEST.2009.5276675
A. Tajvidi, A. Azadeh, Morteza Saberi, H. Izadbakhsh, B. Danesh, A. Gitiforouz
This study presents an integrated fuzzy regression, computer simulation and time series framework to estimate and predict electricity demand for seasonal and monthly changes in electricity consumption especially in developing countries such as China and Iran with non-stationary data. Furthermore, it is difficult to model uncertain behavior of energy consumption with only conventional fuzzy regression or time series and the integrated algorithm could be an ideal substitute for such cases. After reviewing various fuzzy regression models and studying their advantages and shortcomings, the preferred model is selected for estimation by the proposed algorithm. Computer simulation is developed to generate random variables for monthly electricity consumption. Truly, fuzzy regression is run with Computer simulation output too. Preferred Time series model is selected from linear or nonlinear models. For this, after selecting preferred ARIMA model, Mcleod-Li test is applied to determine nonlinearity condition. When, nonlinearity condition is satisfied, the preferred nonlinear model is selected and defined as preferred time series model. At last, preferred model from fuzzy regression and time series model is selected by Granger-Newbold. Also, the impact of data preprocessing and post processing on the fuzzy regression performance is considered by the proposed algorithm. In addition, another unique feature of the proposed algorithm is utilization of Autocorrelation Function (ACF) to define input variables whereas conventional methods use trial and error method. Monthly electricity consumption of Iran from March 1994 to February 2005 is considered as the case of this study. The MAPE estimation of Genetic Algorithm (GA), Artificial Neural Network (ANN) versus the proposed algorithm shows the appropriateness of the proposed algorithm.
{"title":"An integrated simulated-based fuzzy regression algorithm and time series for energy consumption estimation with non-stationary data and case studies","authors":"A. Tajvidi, A. Azadeh, Morteza Saberi, H. Izadbakhsh, B. Danesh, A. Gitiforouz","doi":"10.1109/DEST.2009.5276675","DOIUrl":"https://doi.org/10.1109/DEST.2009.5276675","url":null,"abstract":"This study presents an integrated fuzzy regression, computer simulation and time series framework to estimate and predict electricity demand for seasonal and monthly changes in electricity consumption especially in developing countries such as China and Iran with non-stationary data. Furthermore, it is difficult to model uncertain behavior of energy consumption with only conventional fuzzy regression or time series and the integrated algorithm could be an ideal substitute for such cases. After reviewing various fuzzy regression models and studying their advantages and shortcomings, the preferred model is selected for estimation by the proposed algorithm. Computer simulation is developed to generate random variables for monthly electricity consumption. Truly, fuzzy regression is run with Computer simulation output too. Preferred Time series model is selected from linear or nonlinear models. For this, after selecting preferred ARIMA model, Mcleod-Li test is applied to determine nonlinearity condition. When, nonlinearity condition is satisfied, the preferred nonlinear model is selected and defined as preferred time series model. At last, preferred model from fuzzy regression and time series model is selected by Granger-Newbold. Also, the impact of data preprocessing and post processing on the fuzzy regression performance is considered by the proposed algorithm. In addition, another unique feature of the proposed algorithm is utilization of Autocorrelation Function (ACF) to define input variables whereas conventional methods use trial and error method. Monthly electricity consumption of Iran from March 1994 to February 2005 is considered as the case of this study. The MAPE estimation of Genetic Algorithm (GA), Artificial Neural Network (ANN) versus the proposed algorithm shows the appropriateness of the proposed algorithm.","PeriodicalId":435649,"journal":{"name":"2009 3rd IEEE International Conference on Digital Ecosystems and Technologies","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124949039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-06-01DOI: 10.1109/DEST.2009.5276770
Adelina Tang
Bayesian belief propagation is flexible and highly adaptable in not only machine learning and artificial intelligence methodologies, but also to newer forms of learning involving agent interactions in digital ecosystems, specifically Multi-Agent Systems. One important property of such systems is agent autonomy. An aspect of agent autonomy, enactive knowledge, is investigated here through a Bayesian extension called TAN that supports learning through interactions with the environment. Finally, various scenarios are simulated for an appropriate modelling environment with suggestions for future work.
{"title":"The bayesian approach to belief propagation in digital ecosystems","authors":"Adelina Tang","doi":"10.1109/DEST.2009.5276770","DOIUrl":"https://doi.org/10.1109/DEST.2009.5276770","url":null,"abstract":"Bayesian belief propagation is flexible and highly adaptable in not only machine learning and artificial intelligence methodologies, but also to newer forms of learning involving agent interactions in digital ecosystems, specifically Multi-Agent Systems. One important property of such systems is agent autonomy. An aspect of agent autonomy, enactive knowledge, is investigated here through a Bayesian extension called TAN that supports learning through interactions with the environment. Finally, various scenarios are simulated for an appropriate modelling environment with suggestions for future work.","PeriodicalId":435649,"journal":{"name":"2009 3rd IEEE International Conference on Digital Ecosystems and Technologies","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116584728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-06-01DOI: 10.1109/DEST.2009.5276772
A. Vontas, Nikolaos Protogeros
In our attempt to shed some light on the potential role that Living Labs may play in the future of Europe's econ-omy, we have tried to document in this paper what to our understanding are the four key dimensions of this phenome-non, namely: a) Operation - meaning to analyse how a Living Lab works, b) Interoperability - meaning to outline the harmonisa-tion and/or integration perspectives in terms of methods, tools, infrastructures, applications, etc, c) Impact analysis of Living Labs activities, services and results on the local, regional and European innovation systems. d) Support-ability - meaning the prospective policy designs and orientation at European, Member State as well as Regional levels. Our conceptual paradigm was based on three concurrent methodologies, namely SNA (Social Network Analysis), MASAI®, and PACE, which offered a basis for identifying the key attributes and features of European Living Labs. SNA was mainly used in the first part of the Study, to explore the current connections and interrelations among Living Labs and PACE for the evaluation of the intangible assets created during a Living Lab's life and operation.
{"title":"Evaluating living labs core competences and assets","authors":"A. Vontas, Nikolaos Protogeros","doi":"10.1109/DEST.2009.5276772","DOIUrl":"https://doi.org/10.1109/DEST.2009.5276772","url":null,"abstract":"In our attempt to shed some light on the potential role that Living Labs may play in the future of Europe's econ-omy, we have tried to document in this paper what to our understanding are the four key dimensions of this phenome-non, namely: a) Operation - meaning to analyse how a Living Lab works, b) Interoperability - meaning to outline the harmonisa-tion and/or integration perspectives in terms of methods, tools, infrastructures, applications, etc, c) Impact analysis of Living Labs activities, services and results on the local, regional and European innovation systems. d) Support-ability - meaning the prospective policy designs and orientation at European, Member State as well as Regional levels. Our conceptual paradigm was based on three concurrent methodologies, namely SNA (Social Network Analysis), MASAI®, and PACE, which offered a basis for identifying the key attributes and features of European Living Labs. SNA was mainly used in the first part of the Study, to explore the current connections and interrelations among Living Labs and PACE for the evaluation of the intangible assets created during a Living Lab's life and operation.","PeriodicalId":435649,"journal":{"name":"2009 3rd IEEE International Conference on Digital Ecosystems and Technologies","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114176860","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-06-01DOI: 10.1109/DEST.2009.5276781
Antal Tiberiu Alexandru, Antal Adalbert
The paper gives a new computational method for the determination of the geometrical dimensions of the helical gears, with addendum modification, based on the model of the relative velocities equalization at the beginning and at the ending of the meshing. In this model the relative velocities between the teeth flanks during the meshing are used to increase the lifetime of the gears by their equalization at the points where the differences are highest. Then, the equalized relative velocities are minimized, using a genetic algorithm from the MATLAB computing environment.
{"title":"A method for the determination of the geometrical dimension of the helical gears with increased lifetime","authors":"Antal Tiberiu Alexandru, Antal Adalbert","doi":"10.1109/DEST.2009.5276781","DOIUrl":"https://doi.org/10.1109/DEST.2009.5276781","url":null,"abstract":"The paper gives a new computational method for the determination of the geometrical dimensions of the helical gears, with addendum modification, based on the model of the relative velocities equalization at the beginning and at the ending of the meshing. In this model the relative velocities between the teeth flanks during the meshing are used to increase the lifetime of the gears by their equalization at the points where the differences are highest. Then, the equalized relative velocities are minimized, using a genetic algorithm from the MATLAB computing environment.","PeriodicalId":435649,"journal":{"name":"2009 3rd IEEE International Conference on Digital Ecosystems and Technologies","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129534989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-06-01DOI: 10.1109/DEST.2009.5276718
M. Niemann, Christian Janiesch, N. Repp, R. Steinmetz
IT Systems in companies nowadays are confronted with constantly changing market conditions, new competitive threats and an increasing number of legal regulations. The service-oriented architecture (SOA) paradigm provides a promising way to address these challenges at the level of the company's IT infrastructure. These challenges and the management of the introduced complexity and heterogeneity are targeted by SOA Governance approaches. Hereby, the basic structure of IT Governance frameworks is applicable to SOA; however, they lack applicability concerning some SOA-specific challenges. In this paper, we discuss deficiencies and provide insights of what regulation challenges a SOA Governance approach is actually required to be capable of, in particular in the area of service lifecycles and service marketplaces.
{"title":"Challenges of governance approaches for service-oriented architectures","authors":"M. Niemann, Christian Janiesch, N. Repp, R. Steinmetz","doi":"10.1109/DEST.2009.5276718","DOIUrl":"https://doi.org/10.1109/DEST.2009.5276718","url":null,"abstract":"IT Systems in companies nowadays are confronted with constantly changing market conditions, new competitive threats and an increasing number of legal regulations. The service-oriented architecture (SOA) paradigm provides a promising way to address these challenges at the level of the company's IT infrastructure. These challenges and the management of the introduced complexity and heterogeneity are targeted by SOA Governance approaches. Hereby, the basic structure of IT Governance frameworks is applicable to SOA; however, they lack applicability concerning some SOA-specific challenges. In this paper, we discuss deficiencies and provide insights of what regulation challenges a SOA Governance approach is actually required to be capable of, in particular in the area of service lifecycles and service marketplaces.","PeriodicalId":435649,"journal":{"name":"2009 3rd IEEE International Conference on Digital Ecosystems and Technologies","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127592102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-06-01DOI: 10.1109/DEST.2009.5276717
A. Razavi, A. Marinos, S. Moschoyiannis, P. Krause
With REST becoming a dominant architectural paradigm for web services in distributed systems, more and more use cases are applied to it, including use cases that require transactional guarantees. We believe that the loose coupling that is supported by RESTful transactions, makes this currently our preferred interaction style for digital ecosystems (DEs). To further expand its value to DEs, we propose a RESTful transaction model that satisfies both the constraints of recoverable transactions and those of the REST architectural style. We then show the correctness and applicability of the model.
{"title":"Recovery management in RESTful interactions","authors":"A. Razavi, A. Marinos, S. Moschoyiannis, P. Krause","doi":"10.1109/DEST.2009.5276717","DOIUrl":"https://doi.org/10.1109/DEST.2009.5276717","url":null,"abstract":"With REST becoming a dominant architectural paradigm for web services in distributed systems, more and more use cases are applied to it, including use cases that require transactional guarantees. We believe that the loose coupling that is supported by RESTful transactions, makes this currently our preferred interaction style for digital ecosystems (DEs). To further expand its value to DEs, we propose a RESTful transaction model that satisfies both the constraints of recoverable transactions and those of the REST architectural style. We then show the correctness and applicability of the model.","PeriodicalId":435649,"journal":{"name":"2009 3rd IEEE International Conference on Digital Ecosystems and Technologies","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126221381","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-06-01DOI: 10.1109/DEST.2009.5276731
Yang Hang, S. Fong, Yain-Whar Si, R. Biuk-Aghai
With the rapid advance of information technology, supply chains evolved from clusters of connected companies to a virtual e-marketplace that serves as a central hub for many companies that buy and sell. Over this large community of companies supply chains can be dynamically formed by mediator agents. From the view of an ecosystem, the companies that are connected in the e-marketplace can be viewed as individual entities that have self-interest. They however compete for survival as well as collaborate with each other for projects. This paper is concerned with simulating how dynamic make-to-order supply chains are formed based on two different job competition schemes from the perspective of a supply chain ecosystem. One can see in the simulation that the supply chain ecosystem grows in different directions. One scheme called Cost-driven principle leads to destructive competition while the other one namely Pareto-optimal evolves into a cooperative competition that tries to mutually benefit every participant. Through a visualization tool that we built we show that the Pareto-optimal principle is preferable to the Cost-driven principle in the long-term with regard to global survival.
{"title":"Simulating competition schemes in agent-mediated supply chain ecosystems","authors":"Yang Hang, S. Fong, Yain-Whar Si, R. Biuk-Aghai","doi":"10.1109/DEST.2009.5276731","DOIUrl":"https://doi.org/10.1109/DEST.2009.5276731","url":null,"abstract":"With the rapid advance of information technology, supply chains evolved from clusters of connected companies to a virtual e-marketplace that serves as a central hub for many companies that buy and sell. Over this large community of companies supply chains can be dynamically formed by mediator agents. From the view of an ecosystem, the companies that are connected in the e-marketplace can be viewed as individual entities that have self-interest. They however compete for survival as well as collaborate with each other for projects. This paper is concerned with simulating how dynamic make-to-order supply chains are formed based on two different job competition schemes from the perspective of a supply chain ecosystem. One can see in the simulation that the supply chain ecosystem grows in different directions. One scheme called Cost-driven principle leads to destructive competition while the other one namely Pareto-optimal evolves into a cooperative competition that tries to mutually benefit every participant. Through a visualization tool that we built we show that the Pareto-optimal principle is preferable to the Cost-driven principle in the long-term with regard to global survival.","PeriodicalId":435649,"journal":{"name":"2009 3rd IEEE International Conference on Digital Ecosystems and Technologies","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121945114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-06-01DOI: 10.1109/DEST.2009.5276727
Mark McLaughlin, P. Malone, B. Jennings
In digital ecosystems, where they are no central authorities or single points of failure or control, entities form dynamic relationships to facilitate transactions and knowledge sharing. These relationships are contextual, evolving and not subject to central moderation. The devolved structure of these emergent environments pose unique challenges for identity. In this paper, we build on previous work on identity in digital ecosystems by offering a closer examination of identity requirements and outlining a flexible and extensible identity model framework that uses OASIS SAML-like protocols and metadata to perform the equivalent of operations such as Single Sign-On (SSO). We also introduce an identity model software toolkit, IdentityFlow, that can be used to implement and execute identity protocols; and outline concrete use-cases for SSO protocol implementations.
{"title":"A Model for identity in digital ecosystems","authors":"Mark McLaughlin, P. Malone, B. Jennings","doi":"10.1109/DEST.2009.5276727","DOIUrl":"https://doi.org/10.1109/DEST.2009.5276727","url":null,"abstract":"In digital ecosystems, where they are no central authorities or single points of failure or control, entities form dynamic relationships to facilitate transactions and knowledge sharing. These relationships are contextual, evolving and not subject to central moderation. The devolved structure of these emergent environments pose unique challenges for identity. In this paper, we build on previous work on identity in digital ecosystems by offering a closer examination of identity requirements and outlining a flexible and extensible identity model framework that uses OASIS SAML-like protocols and metadata to perform the equivalent of operations such as Single Sign-On (SSO). We also introduce an identity model software toolkit, IdentityFlow, that can be used to implement and execute identity protocols; and outline concrete use-cases for SSO protocol implementations.","PeriodicalId":435649,"journal":{"name":"2009 3rd IEEE International Conference on Digital Ecosystems and Technologies","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131586926","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-06-01DOI: 10.1109/DEST.2009.5276758
S. Nimmagadda, H. Dreher
Incomplete, improper and untimely information flow among operational units makes operations untidy and slow. Representing petroleum business data in multidimensional data structuring in a data warehousing environment is a solution for a manager's strategic planning, and operational management. Conceptual multidimensional-relational (MR) and EMR (extended multidimensional-relationships) data mapping approaches are proposed for key exploration industry data management. These conceptual models facilitate in developing future implementation data models and help an exploration data analyst, for better understanding of data integration and effective data mining.
{"title":"On designing multidimensional oil and gas business data structures for effective data warehousing and mining","authors":"S. Nimmagadda, H. Dreher","doi":"10.1109/DEST.2009.5276758","DOIUrl":"https://doi.org/10.1109/DEST.2009.5276758","url":null,"abstract":"Incomplete, improper and untimely information flow among operational units makes operations untidy and slow. Representing petroleum business data in multidimensional data structuring in a data warehousing environment is a solution for a manager's strategic planning, and operational management. Conceptual multidimensional-relational (MR) and EMR (extended multidimensional-relationships) data mapping approaches are proposed for key exploration industry data management. These conceptual models facilitate in developing future implementation data models and help an exploration data analyst, for better understanding of data integration and effective data mining.","PeriodicalId":435649,"journal":{"name":"2009 3rd IEEE International Conference on Digital Ecosystems and Technologies","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116310506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-06-01DOI: 10.1109/DEST.2009.5276787
Kevin Chai, V. Potdar, E. Chang
The success of social software depends on contributions made by two key entities; the infrastructure provider(s) and the content providers (users). Currently, social software providers do not possess a powerful and generic approach to measure the contributions of their users. The ability of measuring user contributions will allow social software providers to accurately identify, acknowledge and reward their content contributors. As a result, content providers may become motivated to contribute content more regularly. This paper proposes a user contribution measurement model which is validated against an operational web-based discussion forum.
{"title":"User contribution measurement model for web-based discussion forums","authors":"Kevin Chai, V. Potdar, E. Chang","doi":"10.1109/DEST.2009.5276787","DOIUrl":"https://doi.org/10.1109/DEST.2009.5276787","url":null,"abstract":"The success of social software depends on contributions made by two key entities; the infrastructure provider(s) and the content providers (users). Currently, social software providers do not possess a powerful and generic approach to measure the contributions of their users. The ability of measuring user contributions will allow social software providers to accurately identify, acknowledge and reward their content contributors. As a result, content providers may become motivated to contribute content more regularly. This paper proposes a user contribution measurement model which is validated against an operational web-based discussion forum.","PeriodicalId":435649,"journal":{"name":"2009 3rd IEEE International Conference on Digital Ecosystems and Technologies","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125956173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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