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2012

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Articles 421 - 450 of 12196

Full-Text Articles in Physical Sciences and Mathematics

It Governance Silo In The Firm: An Analysis Of Governance Research Literature, Akemi Chatfield, Padmaharsha Wanninayaka Dec 2012

It Governance Silo In The Firm: An Analysis Of Governance Research Literature, Akemi Chatfield, Padmaharsha Wanninayaka

Dr Akemi Chatfield

No abstract provided.

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Promises And Successful Practice In It Governance: A Survey Of Australian Senior It Managers, Akemi T. Chatfield, Terrence Coleman Dec 2012

Promises And Successful Practice In It Governance: A Survey Of Australian Senior It Managers, Akemi T. Chatfield, Terrence Coleman

Dr Akemi Chatfield

In a global, digital economy, companies increasingly depend on IT for timely information sharing,effective operational control, rapid innovation, speed to market, and customer satisfaction. On theother hand, recent global financial crisis and economic recessions encourage trends for increasedmanagerial scrutiny to reduce IT spending and to increase business value of IT. Globally, concepts ofIT governance (ITG) have proliferated as a solution for improving IT management under businessuncertainty and rapid technological change. However, empirical research on organisational ITGpractice still is lacking and urgently required. This paper, therefore, presents survey results on ITGpractice from a perspective of senior IT managers in Australian private-sector …

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Interactive Effects Of Networked Publics And Social Media On Transforming The Public Sphere: A Survey Of Iran's Leaderless 'Social Media Revolution', Akemi Chatfield, Hans Scholl, Reza Akbari, Nima Mirzayi Dec 2012

Interactive Effects Of Networked Publics And Social Media On Transforming The Public Sphere: A Survey Of Iran's Leaderless 'Social Media Revolution', Akemi Chatfield, Hans Scholl, Reza Akbari, Nima Mirzayi

Dr Akemi Chatfield

It has been argued that hierarchical 'command and control' leadership is required to coordinate massive and rapid military or disaster response. Against this, the concept of leaderless 'social media revolution' refers to the wide-spread use of Web 2.0 social media by ordinary citizens to transform the public sphere and engage in collective political action, including coordinating massive and rapid protests against government. However, conceptual and empirical research efforts remain scarce to date. This research draws on the emergent perspective on causal agency in effecting change in social systems to examine our research proposition that the interactive effects of networked publics …

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The Impact Of Rfid Technology On Warehouse Process Innovation: A Pilot Project In The Tpl Industry, Samuel Fosso Wamba, Akemi Chatfield Dec 2012

The Impact Of Rfid Technology On Warehouse Process Innovation: A Pilot Project In The Tpl Industry, Samuel Fosso Wamba, Akemi Chatfield

Dr Akemi Chatfield

Using the value chain model which provides a process view, this longitudinal case study and simulation modeling analysis of a Canadian third-party logistics (TPL) supply chain provides some empirical support for the enabling role of RFID technology in effecting warehouse process innovation and optimization for the focal TPL firm. However, the findings of our study also reveal the RFID technology implementation costs as the key inhibitor of RFID widespread adoption and usage among suppliers. This, in turn, precluded the focal TPL firm from implementing the best optimum RFID solution to create better business value from the RFID project.

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E-Government Challenge In Disaster Evacuation Response: The Role Of Rfid Technology In Building Safe And Secure Local Communities, A. Chatfield, S. F. Wamba, T. Hirokazu Dec 2012

E-Government Challenge In Disaster Evacuation Response: The Role Of Rfid Technology In Building Safe And Secure Local Communities, A. Chatfield, S. F. Wamba, T. Hirokazu

Dr Akemi Chatfield

While geographic information systems (GIS) can provide information on the static locations of critical infrastructure and evacuation routes, they do not provide the dynamically changing locations of things and people on the move. In contrast, radio frequency identification (RFID) wireless network technology can automatically identify and track the movement of assets (i.e., fire engines, ambulances, and rescue workers) and vulnerable citizens on the move (i.e., the elderly and the disabled), and hence providing local governments and communities with real-time information and enhanced decision-making capabilities, during chaotic disaster response operations (i.e., evacuation). Although the potential high impact and strategic value of …

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Two Families Of Exel-Larsen Crossed Products, Nathan Brownlowe, Iain Raeburn Dec 2012

Two Families Of Exel-Larsen Crossed Products, Nathan Brownlowe, Iain Raeburn

Dr Nathan Brownlowe

Larsen has recently extended Exel’s construction of crossed products from single endomorphisms to abelian semigroups of endomorphisms, and here we study two families of her crossed products. First, we look at the natural action of the multiplicative semigroup N× on a compact abelian group Γ , and the induced action on C(Γ ). We prove a uniqueness theorem for the crossed product, and we find a class of connected compact abelian groups Γ for which the crossed product is purely infinite simple. Second, we consider some natural actions of the additive semigroup N2 on the UHF cores in 2-graph algebras, …

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Boundary Quotients Of The Toeplitz Algebra Of The Affine Semigroup Over The Natural Numbers, Nathan Brownlowe, Astrid An Huef, Marcelo Laca, Iain Raeburn Dec 2012

Boundary Quotients Of The Toeplitz Algebra Of The Affine Semigroup Over The Natural Numbers, Nathan Brownlowe, Astrid An Huef, Marcelo Laca, Iain Raeburn

Dr Nathan Brownlowe

No abstract provided.

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A Comparison Of Cationic Surfactant Immobilized Ion Exchange Membranes In Their Application For Use In Extraction Of 4-Nitophenol, Robert Derrek Brown Dec 2012

A Comparison Of Cationic Surfactant Immobilized Ion Exchange Membranes In Their Application For Use In Extraction Of 4-Nitophenol, Robert Derrek Brown

Dr Robert Brown

Solid Phase Extraction has replaced distillation and liquid-liquid extraction as the most widely used method for extraction from solution. Though traditional SPE has seen great success, its downfalls are that it requires meticulous preparation procedures requiring funtionalized silanes and silica or polymerization courses. An alternative is ion exchange membranes to which long carbon chain ionic surfactants have been attached. The S1000 membrane ion exchange capacity was measured to be approximately 110 micro-equil/disc while the P81 membrane was 150 micro-equil/disc. Octadecyltri-methylammonium surfactant was immobilized on the membrane surface, qualitated through the use of ATR-FTIR, and quantified through elemental analysis. Kinetic adsorption …

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Hierarchic Decomposition In Agent Oriented Conceptual Modelling, R. Brown, Aditya Ghose Dec 2012

Hierarchic Decomposition In Agent Oriented Conceptual Modelling, R. Brown, Aditya Ghose

Dr Robert Brown

Software development processes requires a thorough understanding of stakeholder objectives and requirements. Product-centrism is an insufficient stance from which to achieve greater efficiencies and reduce reengineering. Stakeholder requirement elicitation is thus worthy of formalization. A suite of tools, notably the i* model, provides a framework for early-phase requirements capture. These tools currently are at best only semiautomated and essentially consist of a notational glossary and sets of mark-up symbols. Increasing formalization may lead to greater automation of the process in the future, but currently there is a degree of flexibility that presents pitfalls for the unwary practitioner. A notion of …

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A Model For Coherent Distributed Systems, Robert L. Brown, Peter J. Denning, Walter F. Tichy Dec 2012

A Model For Coherent Distributed Systems, Robert L. Brown, Peter J. Denning, Walter F. Tichy

Dr Robert Brown

No abstract provided.

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An Evaluative Framework For Assessing Information Management In Watershed Management: The Case Of The Grand River Conservation Authority (Ontario), Robert Scott Brown Dec 2012

An Evaluative Framework For Assessing Information Management In Watershed Management: The Case Of The Grand River Conservation Authority (Ontario), Robert Scott Brown

Dr Robert Brown

Watershed management has been rapidly evolving over the last 50 years. The current focus has been adaptive and ecosystem-based approaches to watershed management, redefining roles, responsibilities, and relationships of watershed organizations. While entire management models need to be heavily scrutinized, the practices and policies surrounding information are fundamentally important. Information forms the understanding and knowledge for watershed decision-making. Watershed organizations need to be critical of the policies and practices affecting their collection, storage, processing, analysis, monitoring, and reporting of data and information. Among the Conservation Authorities, the GRCA has developed a proficiency at information management, doing it as well as …

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Automatic, Remote Status Lights For Vax Unix, Douglas E. Comer, Robert L. Brown Dec 2012

Automatic, Remote Status Lights For Vax Unix, Douglas E. Comer, Robert L. Brown

Dr Robert Brown

No abstract provided.

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Rodent Control Problems In Developing Countries, Robert Z. Brown Dec 2012

Rodent Control Problems In Developing Countries, Robert Z. Brown

Dr Robert Brown

None of the so-called developing countries has an adequate rodent control program at present. In only a few of these countries is any rodent control research occurring despite the fact that rodent problems are actually quite serious in many regions and potentially so in others. Expertise, techniques and materials from the developed countries are of limited usefulness because of major differences in rodent species involved, standards for food handling and sanitation, and in the cultural contexts in which rodent control must occur. Trained personnel, both for control work and the basic research needed, are in very short supply. In addition, …

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Should Distributed Systems Be Hidden?, Peter J. Denning, Robert L. Brown Dec 2012

Should Distributed Systems Be Hidden?, Peter J. Denning, Robert L. Brown

Dr Robert Brown

No abstract provided.

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An Application Of The 5-S Activity Theoretic Requirements Method, Robert Brown, Peter Hyland, Ian Piper Dec 2012

An Application Of The 5-S Activity Theoretic Requirements Method, Robert Brown, Peter Hyland, Ian Piper

Dr Robert Brown

One of the most crucial aspects of highly interactive, multi-user, organisational systems is the interface. The Human Computer Interaction (HCI) community has not adopted rigorous Formal Methods with open arms (Paterno, 1996). However, the HCI community has widely adopted Usability Engineering approaches (Corporate Solutions 2006), such as Nielsen’s (1994), which offers considerable formality. There remains, however, scope for user interface (UI) design to adopt a theoretical framework to enhance consistency across the whole design and development lifecycle. A theoretically-consistent framework from initial conceptual elicitation to evaluation of the finished product may prove useful. Since the aim of UI design is …

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Towards Knowledge Management In Sports Event Management: Context Analysis Of Malaysian Biannual Games With Commonkads, Azizul Rahman Abdul Ghaffar, Ghassan Beydoun, Jun Shen, William Tibben Dec 2012

Towards Knowledge Management In Sports Event Management: Context Analysis Of Malaysian Biannual Games With Commonkads, Azizul Rahman Abdul Ghaffar, Ghassan Beydoun, Jun Shen, William Tibben

Associate Professor Ghassan Beydoun

Context Analysis (CA) is typically used as an early phase preceding the development of a knowledge-based systems in order to indicate how the system should interact with its environment and the various stakeholders. We undertake a detailed context analysis of business processes of the Malaysian Games (MG)to highlight blind spots of the process and enable the identification of an initial sports event knowledge management (KM) framework. Firstly, our CommonKADS driven analysis highlights how we can improve the business process and enable the organization to develop, distribute and apply its knowledge resources effectively. Secondly, the paper highlights specific features about the …

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P2cp: A New Cloud Storage Model To Enhance Performance Of Cloud Services, Zhe Sun, Jun Shen, Ghassan Beydoun Dec 2012

P2cp: A New Cloud Storage Model To Enhance Performance Of Cloud Services, Zhe Sun, Jun Shen, Ghassan Beydoun

Associate Professor Ghassan Beydoun

This paper presents a storage model named Peer to Cloud and Peer (P2CP). Assuming that the P2CP model follows the Poisson process or Little’s law, we prove that the speed and availability of P2CP is generally better than that of the pure Peer to Peer (P2P) model, the Peer to Server, Peer (P2SP) model or the cloud model. A key feature of our P2CP is that it has three data transmission tunnels: the cloud-user data transmission tunnel, the clients’ data transmission tunnel, and the common data transmission tunnel. P2CP uses the cloud storage system as a common storage system. When …

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Supporting Developers In Complex Systems Modelling, Antonio A. Lopez-Lorca, Ghassan Beydoun, Rodrigo Martinez-Bejar, Holly Tootell Dec 2012

Supporting Developers In Complex Systems Modelling, Antonio A. Lopez-Lorca, Ghassan Beydoun, Rodrigo Martinez-Bejar, Holly Tootell

Associate Professor Ghassan Beydoun

Development of complex systems often requires building a large number of models with many interconnections and dependencies among them. The success of a project can be compromised by cognitive overload or limits of developers, who might miss relationships between elements of the models. Developing Multi-Agent Systems (MAS) is a typical example of where this may occur. Despite of its potential, this technology has not yet been widely adopted by industry due to its complexity and frequent errors in modelling activities. These errors typically propagate to later phases of the MAS development lifecycle, becoming costlier to fix and then lowering the …

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Incremental Acquisition Of Search Knowledge, Ghassan Beydoun, Achim Hoffmann Dec 2012

Incremental Acquisition Of Search Knowledge, Ghassan Beydoun, Achim Hoffmann

Associate Professor Ghassan Beydoun

The development of highly e!ective heuristics for search problems is a di$cult and time-consuming task. We present a knowledge acquisition approach to incrementally model expert search processes. Though, experts do not normally have complete introspective access to that knowledge, their explanations of actual search considerations seem very valuable in constructing a knowledge-level model of their search processes.

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Automating Dimensional Tolerancing Using Ripple Down Rules (Rdr), Ghassan Beydoun, Achim Hoffmann, Ramsey Hamade Dec 2012

Automating Dimensional Tolerancing Using Ripple Down Rules (Rdr), Ghassan Beydoun, Achim Hoffmann, Ramsey Hamade

Associate Professor Ghassan Beydoun

We propose to use a knowledge based approach to assist in mechanical design focusing on dimensional tolerancing. To illustrate our approach, we capture the knowledge which human designers utilize in order to specify dimensional tolerances on shafts and mating holes in order to meet desired classes of fit as set by relevant engineering standards. The software system we developed would help mechanical designers become more effective in the time-consuming dimensioning and tolerancing process of their designs in the future. In doing this, the paper makes a twofold contribution to the field of knowledge acquisition: firstly, interface was adjusted to receive …

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Towards Peer Selection In A Semantically-Enriched Service Execution Framework With Qos Specifications, Jun Shen, Ghassan Beydoun, Graham Low, Brian Henderson-Sellers, Shuai Yuan Dec 2012

Towards Peer Selection In A Semantically-Enriched Service Execution Framework With Qos Specifications, Jun Shen, Ghassan Beydoun, Graham Low, Brian Henderson-Sellers, Shuai Yuan

Associate Professor Ghassan Beydoun

This paper promotes an ontology-based multi agent system (MAS) framework to facilitate Peer-to-Peer (P2P) service selection with multiple service properties. P2P-based service has emerged as an important new field in the distributed computing arena. It focuses on intensive service sharing, innovative applications and compositions, and, in some cases, high performance orientation. However, one of the remaining challenges for the P2P-based service composition process is how to effectively discover and select the most appropriate peers to execute the service applications when considering multiple properties of the requested services. By introducing an ontology, different ontology-based e-service profiles can be proposed to facilitate …

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Design Of A P2p Information Sharing Mas Using Mobmas, Numi Tran, Ghassan Beydoun, Graham Low Dec 2012

Design Of A P2p Information Sharing Mas Using Mobmas, Numi Tran, Ghassan Beydoun, Graham Low

Associate Professor Ghassan Beydoun

Most existing agent-oriented methodologies ignore system extensibility, interoperability and reusability issues. In light of this, we have developed MOBMAS – a “Methodology for Ontology-Based MASs” which makes use of ontologies as a central modeling tool, utilising their roles in facilitating interoperability and reusability. As part of an ongoing validation of MOBMAS, we demonstrate in this paper its use on a peer-to-peer (P2P) community-based information sharing application. MOBMAS is used by an experienced software developer, who is not an author of the methodology, to guide the development of the P2P application.

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Development Of A Peer-To-Peer Information Sharing System Using Ontologies, Ghassan Beydoun, Graham Low, Numi Tran, Paul Bogg Dec 2012

Development Of A Peer-To-Peer Information Sharing System Using Ontologies, Ghassan Beydoun, Graham Low, Numi Tran, Paul Bogg

Associate Professor Ghassan Beydoun

Most existing agent-oriented methodologies ignore system extensibility, interoperability and reusability issues. Ontologies have been found to play a significant role in facilitating interoperability, reusability, MAS development activities (including MAS analysis and agent knowledge modeling) and MAS run-time operation (including agent communication and reasoning). However, most of the existing AOSE methodologies do not provide support for ontology-based MAS development. We present software engineering requirements for ontology-based development for MAS and examine an existing methodology, MOBMAS - a "Methodology for Ontology-Based MASs", which makes use of ontologies as a modeling tool. In this examination, we highlight how MOBMAS can be extended to …

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Towards Agent-Oriented Approach To A Call Management System, Amir Ashamalla, Ghassan Beydoun, Graham Low Dec 2012

Towards Agent-Oriented Approach To A Call Management System, Amir Ashamalla, Ghassan Beydoun, Graham Low

Associate Professor Ghassan Beydoun

There is more chance of a completed sale if the end customers and relationship managers are suitably matched. This in turn can reduce the number of calls made by a call centre reducing operational costs such as working time and phone bills. This chapter is part of ongoing research aimed at helping a CMC to make better use of its personnel and equipment while maximizing the value of the service it offers to its client companies and end customers. This is accomplished by ensuring the optimal use of resources with appropriate real-time scheduling and load balancing and matching the end …

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Evaluating Usage Of Wsmo And Owl-S In Semantic Web Services, Lina Azleny Kamaruddin, Jun Shen, Ghassan Beydoun Dec 2012

Evaluating Usage Of Wsmo And Owl-S In Semantic Web Services, Lina Azleny Kamaruddin, Jun Shen, Ghassan Beydoun

Associate Professor Ghassan Beydoun

Applying ontologies is the most promising approach to semantically enrich Web services. To facilitate this, two efforts contributed the most in enabling the creation of ontologies: OWL-S from the US and WSMO in Europe. These two compete and promote their ontologies from the design perspective, reflecting their inventors’ bias but not offering much help to Web service developers using them. To bypass existing biases and enable evaluation of ontologies expressed in these two languages, this paper provides a study of the two important facilitators, OWL-S and WSMO, surveying their usage in several SWS Projects and identifying their respective and outstanding …

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Modelling Awareness Of Agents Using Policies, Amir Talaei-Khoei, Pradeep Ray, Nandan Parameswaran, Ghassan Beydoun Dec 2012

Modelling Awareness Of Agents Using Policies, Amir Talaei-Khoei, Pradeep Ray, Nandan Parameswaran, Ghassan Beydoun

Associate Professor Ghassan Beydoun

In addition to cooperation, research in disaster management exposes the need for policy awareness to recognize relevant information in enhancing cooperation. Intelligent software agents have previously been employed for problem solving in disaster situations but without incorporating how the agents can create or model awareness. This paper presents an awareness based modelling method, called MAAP, to maintain awareness of software agents of a given set of policies. The paper presents preliminary results indicating that the use of policies as a source of awareness, as facilitated by MAAP, is a potentially effective method to enhance cooperation.

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Theoretical Basis For Hierarchical Incremental Knowledge Acquisition, Ghassan Beydoun, Achim Hoffmann Dec 2012

Theoretical Basis For Hierarchical Incremental Knowledge Acquisition, Ghassan Beydoun, Achim Hoffmann

Associate Professor Ghassan Beydoun

Human experts tend to introduce intermediate terms in giving their explanations. The expert's explanation of such terms is operational for the context that triggered the explanation; however, term de"nitions remain often incomplete. Further, the expert's (re) use of these terms is hierarchical (similar to natural language). In this paper, we argue that a hierarchical incremental knowledge acquisition (KA) process that captures the expert terms and operationalizes them while incompletely de"ned makes the KA task more e!ective. Towards this we present our knowledge representation formalism Nested Ripple Down Rules (NRDR) that is a substantial extension to the (Multiple Classi"cation) Ripple Down …

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Reflecting On Ontologies Towards Ontology-Based Agent-Oriented Software Engineering, Ghassan Beydoun, Brian Henderson-Sellers, Jun Shen, G. Low Dec 2012

Reflecting On Ontologies Towards Ontology-Based Agent-Oriented Software Engineering, Ghassan Beydoun, Brian Henderson-Sellers, Jun Shen, G. Low

Associate Professor Ghassan Beydoun

“Ontology” in association with “software engineering” is becoming commonplace. This paper argues for the need to place ontologies at the centre of the software development lifecycle for multi agent systems to enhance reuse of software workproducts as well as to unify agent-based software engineering knowledge. The paper bridges the state-of-the-art of ontologies research from Knowledge Engineering (KE) within Artificial Intelligence and Metamodelling within Software Engineering (SE). It presents a sketch of an ontology-based Multi Agent System (MAS) methodology discussing key roles on ontologies and their impact of workproducts, illustrating these in a MAS software development project for an important application …

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Modelling With Agents, Estefania Argente, Ghassan Beydoun, Ruben Fuentes-Fernandez, Brian Henderson-Sellers, Graham Low Dec 2012

Modelling With Agents, Estefania Argente, Ghassan Beydoun, Ruben Fuentes-Fernandez, Brian Henderson-Sellers, Graham Low

Associate Professor Ghassan Beydoun

No abstract provided.

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Mechanisms That Impact Online Auction Trust, Glenn Bewsell Dec 2012

Mechanisms That Impact Online Auction Trust, Glenn Bewsell

Dr Glenn Bewsell

This research investigates mechanisms that impact trust and trust as an organising principle at online auctions using data collected from a community website. Qualitative analysis is used to make sense of the data collected and to identify key factors that impact trust and organising for trust.As a result of the discussion, I attempt to explore key factors that impact trust at online auctions and relate the discussion to previous research. This research adds to the understanding of trust theory and online auction trust, and this research can be used by practitioners to better support users and improve the design of …

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