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Distributed search engine architecture based on topic specific searches

AIP Conference Proceedings 2015年第1期1660卷

作者： Yousra Abudaqqa Ahmed Patel aSchool of Computer Science Centre of Software Technology and Management (SOFTAM) Faculty of Information Science and Technology (FTSM) Universiti Kebangsaan Malaysia 43600 UKM Bangi Selangor Malaysia bSchool of Computer Science Centre of Software Technology and Management (SOFTAM) Faculty of Information Science and Technology (FTSM) Universiti Kebangsaan Malaysia 43600 UKM Bangi Selangor Malaysia cVisiting Professor School of Computing and Information Systems Faculty of Science Engineering and Computing Kingston University Kingston upon Thames KT1 2EE United Kingdom

Indisputably, search engines (SEs) abound. The monumental growth of users performing online searches on the Web is a contending issue in the contemporary world nowadays. For example, there are tens of billions of searches performed everyday, which typically offer the users many irrelevant results which are time consuming and costly to the user. Based on the afore-going problem it has become a herculean task for existing Web SEs to provide complete, relevant and up-to-date information response to users’ search queries. To overcome this problem, we developed the Distributed Search Engine Architecture (DSEA), which is a new means of smart information query and retrieval of the World Wide Web (WWW). In DSEAs, multiple autonomous search engines, owned by different organizations or individuals, cooperate and act as a single search engine. This paper includes the work reported in this research focusing on development of DSEA, based on topic-specific specialised search engines. In DSEA, the results to specific queries could be provided by any of the participating search engines, for which the user is unaware of. The important design goal of using topic-specific search engines in the research is to build systems that can effectively be used by larger number of users simultaneously. Efficient and effective usage with good response is important, because it involves leveraging the vast amount of searched data from the World Wide Web, by categorising it into condensed focused topic -specific results that meet the user’s queries. This design model and the development of the DSEA adopt a Service Directory (SD) to route queries towards topic-specific document hosting SEs. It displays the most acceptable performance which is consistent with the requirements of the users. The evaluation results of the model return a very high priority score which is associated with each frequency of a keyword.

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Cloudsme: Developing a cloud computing-based platform for simulation in manufacturing and engineering

Cloudsme: Developing a cloud computing-based platform for si...

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2014 Operational Research Society Simulation Workshop, SW 2014

作者： Taylor, Simon J. E. Kiss, Tamas Kacsuk, Peter Terstyanszky, Gabor Nicola, Fantini Department of Information Systems and Computing Brunel University Uxbridge MiddlesexUB8 3PH United Kingdom Centre for Parallel Computing Department of Business Information Systems University of Westminster 115 New Cavendish St LondonW1W 6UW United Kingdom MTA SZTAKI Victor Hugo u. 18-22 Budapest1132 Hungary Department of Computer Science and Software Engineering Faculty of Science and Technology University of Westminster LondonW1W 6UW United Kingdom Huobstrasse 10 Pfäffikon8808 Switzerland

There is a demand from simulation users for speed, the ability to obtain quickly results from simulation runs. Cloud computing offers the potential for scalable, on-demand access to resources that can be used to speed up simulation. However, developing cloud computing solutions for industry is difficult without appropriate expertise. This paper introduces the CloudSME project that is dedicated to developing cloud computing solutions for simulation in industry and presents an overview of the CloudSME Simulation Platform that is being used to support an initial set of Cloud-based versions of Simul8's discrete-event simulation environment, Ascomp's TransAT computational fluid dynamics application, Ingecon's 3D Scan Insole Designer tool and 2MORO's Bfly software for aircraft maintenance logistics. The paper presents an overview of cloud computing, the CloudSME project, the architecture of the CloudSME Simulation Platform and its two key elements: gUse and CloudBroker.

关键词： Discrete event simulation

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Resolving vulnerability identification errors using security requirements on business process models

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Information Management and Computer Security 2013年第3期21卷 202-223页

作者： Taubenberger, Stefan Jürjens, Jan Yu, Yijun Nuseibeh, Bashar Computing Department Open University Milton Keynes United Kingdom Department of Computer Science Technical University Dortmund Dortmund Germany Fraunhofer Institute for Software Systems Engineering ISST Dortmund Germany Lero the Irish Software Engineering Research Centre Computing Department University of Limerick Limerick Ireland Open University Milton Keynes United Kingdom

Purpose - In any information security risk assessment, vulnerabilities are usually identified by information-gathering techniques. However, vulnerability identification errors - wrongly identified or unidentified vulnerabilities - can occur as uncertain data are used. Furthermore, businesses' security needs are not considered sufficiently. Hence, security functions may not protect business assets sufficiently and cost-effectively. This paper aims to resolve vulnerability errors by analysing the security requirements of information assets in business process models. Design/methodology/approach - Business process models have been selected for use, because there is a close relationship between business process objectives and risks. Security functions are evaluated in terms of the information flow of business processes regarding their security requirements. The claim that vulnerability errors can be resolved was validated by comparing the results of a current risk assessment approach with the proposed approach. The comparison is conducted both at three entities of an insurance company, as well as through a controlled experiment within a survey among security professionals. Findings - Vulnerability identification errors can be resolved by explicitly evaluating security requirements in the course of business;this is not considered in current assessment methods. Originality/value - It is shown that vulnerability identification errors occur in practice. With the explicit evaluation of security requirements, identification errors can be resolved. Risk assessment methods should consider the explicit evaluation of security requirements. Copyright © 2013 Emerald Group Publishing Limited. All rights reserved.

关键词： Risk assessment

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Modeling a web forum ecosystem into an enriched social graph

Modeling a web forum ecosystem into an enriched social graph

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3rd International Workshops on Modeling Social Media, MSM 2012

作者： Anwar, Tarique Abulaish, Muhammad Centre for Computing and Engineering Software Systems Swinburne University of Technology Melbourne VIC 3122 Australia New Delhi 25 India

ISBN: (纸本)9783642453915

This paper considers the community interactions in online social media (OSM) as an OSM ecosystem and addresses the problem of modeling a Web forum ecosystem into a social graph. We propose a text mining method to model cross-thread interactions and interests of users in a Web forum ecosystem to generate an enriched social graph. In addition to modeling reply-to relationships between users, the proposed method models message-similarity relationship to keep track of all similar posts resulting out of deviated discussions in different threads. Although, the proposed graph-generation method considers a reply-to relation as the primary means of linkage, it establishes links between clusters of similar posts instead of links between individual users, and the linkages between users can be derived from the existing linkages between clusters. The method starts with linking posts in each thread individually by identifying reply-to relationships, and applies an agglomerative clustering algorithm based on similarity of posts across the forum to group all posts into different clusters. Finally, relations between each pair of individual posts are mapped to create a link between clusters containing the posts. As a result, the generated social graph resembles a network of clusters that can also be presented at the granule of users who authored the posts to generate a social network of forum users, and at the same time it keeps information for all other users with similar interests. © Springer-Verlag 2013.

关键词： Ecosystems

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Is it all lost? A study of inactive open source projects 9th

Is it all lost? A study of inactive open source projects

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9th IFIP WG 2.13 International Conference on Open Source software, OSS 2013

作者： Khondhu, Jymit Capiluppi, Andrea Stol, Klaas-Jan Department of Information Systems and Computing Brunel University United Kingdom Lero—The Irish Software Engineering Research Centre University of Limerick Ireland

ISBN: (纸本)9783642389276

Open Source software (OSS) proponents suggest that when developers lose interest in their project, their last duty is to "hand it off to a competent successor." However, the mechanisms of such a hand-off are not clear, or widely known among OSS developers. As a result, many OSS projects, after a certain long period of evolution, stop evolving, in fact becoming "inactive" or "abandoned" projects. This paper presents an analysis of the population of projects contained within one of the largest OSS repositories available (***), in order to describe how projects abandoned by their developers can be identified, and to discuss the attributes and characteristics of these inactive projects. In particular, the paper attempts to differentiate projects that experienced maintainability issues from those that are inactive for other reasons, in order to be able to correlate common characteristics to the "failure" of these projects. © IFIP International Federation for Information Processing 2013.

关键词： Open source software

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Understand system's relative effectiveness using adapted confusion matrix

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2nd International Conference on Design, User Experience, and Usability: Design Philosophy, Methods, and Tools, DUXU 2013, Held as Part of 15th International Conference on Human-Computer Interaction, HCI International 2013

作者： Jiang, Nan Liu, Haibin Software Systems Research Centre School of Design Engineering and Computing Bournemouth University United Kingdom National Center for Biotechnology Information National Library of Medicine National Institutes of Health United States

ISBN: (纸本)9783642392283

The effectiveness of a system refers to the accuracy and completeness with which users achieve specified goals. These two aspects are interpreted as errors and completion in the context of usability testing. However, a holistic view of effectiveness is not straight forward to establish in a comparative test because the two measures focus on different aspects of user outputs. In this paper, we propose a predictive method to measure a system's relative effectiveness based on its own performance prediction. We achieve it by using an adapted confusion matrix to establish a correlation model between the two measures. A real-world use case is provided to demonstrate the usefulness of our method in a comparative study of the two websites. © 2013 Springer-Verlag Berlin Heidelberg.

关键词： Image resolution

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Automated software architecture security risk analysis using formalized signatures 13

Automated software architecture security risk analysis using...

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International Conference on software engineering (ICSE)

作者： Mohamed Almorsy John Grundy Amani S. Ibrahim Centre for Computing and Engineering Software Systems Swinburne University of Technology Melbourne Australia

ISBN: (纸本)9781467330763

Reviewing software system architecture to pinpoint potential security flaws before proceeding with system development is a critical milestone in secure software development lifecycles. This includes identifying possible attacks or threat scenarios that target the system and may result in breaching of system security. Additionally we may also assess the strength of the system and its security architecture using well-known security metrics such as system attack surface, Compartmentalization, least-privilege, etc. However, existing efforts are limited to specific, predefined security properties or scenarios that are checked either manually or using limited toolsets. We introduce a new approach to support architecture security analysis using security scenarios and metrics. Our approach is based on formalizing attack scenarios and security metrics signature specification using the Object Constraint Language (OCL). Using formal signatures we analyse a target system to locate signature matches (for attack scenarios), or to take measurements (for security metrics). New scenarios and metrics can be incorporated and calculated provided that a formal signature can be specified. Our approach supports defining security metrics and scenarios at architecture, design, and code levels. We have developed a prototype software system architecture security analysis tool. To the best of our knowledge this is the first extensible architecture security risk analysis tool that supports both metric-based and scenario-based architecture security analysis. We have validated our approach by using it to capture and evaluate signatures from the NIST security principals and attack scenarios defined in the CAPEC database.

关键词： Security Measurement Computer architecture Unified modeling language software software architecture Risk analysis

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Fire tracking with collective intelligence using dynamic priority maps

Fire tracking with collective intelligence using dynamic pri...

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Congress on Evolutionary Computation

作者： David J. Howden Centre for Computing and Engineering Software Systems Swinburne University of Technology Melbourne Australia

ISBN: (纸本)9781479904532

This paper describes a swarm control algorithm based on distributed pheromone maps to effectively track a moving fire front. The algorithm uses a single heuristic to maintain persistent surveillance to detect new fires, while concurrently allowing for tracking of known fires. Control of the swarm is fully distributed and self-contained; requiring no external communication infrastructure and being resilient to individual hardware failures.

关键词： Peer-to-peer computing Surveillance Robots Heuristic algorithms Fuels Cameras Fires

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Social Networks and Crowdsourcing for Stakeholder Analysis in System of systems Projects

Social Networks and Crowdsourcing for Stakeholder Analysis i...

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International Conference on System of systems engineering

作者： Soo Ling Lim Cornelius Ncube Software Systems Research Centre School of Design Engineering and Computing Bournemouth University

ISBN: (纸本)9781467355964

In system of systems engineering, stakeholders are individuals, groups or organizations that stand to gain or lose from the success or failure of a system of systems. systems of systems pose unique problems for stakeholder analysis due to their evolutionary nature, emergent behavior, operational independence, managerial independence, and geographical distribution of their constituent systems. This paper proposes the use of social networks and crowdsourcing to identify and prioritize the stakeholders for system of systems projects. The proposed method crowdsources the stakeholders to recommend other stakeholders, builds a social network of stakeholders, and prioritizes stakeholders using social network measures. The paper describes the method, and discusses the strengths and limitations of applying the method in system of systems projects.

关键词： System of systems Requirements engineering Stakeholder identification Stakeholder analysis Social network analysis Crowdsourcing Stakeholder analysis Social Networks System of systems Crowdsource Requirements engineering Social network analysis Social Media Stakeholders Social Capital

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Using concrete visual notations as first class citizens for model transformation specification

Using concrete visual notations as first class citizens for ...

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IEEE Symposium on Visual Languages and Human Centric computing (VL/HCC)

作者： Iman Avazpour John Grundy Centre for Computing and Engineering Software and Systems Faculty of ICT Swinburne University of Technology Hawthorn VIC Australia

ISBN: (纸本)9781479903702

Model transformations are an important part of Model Driven engineering (MDE). To generate a transformation with current MDE approaches, users are required to specify (or provide) complex meta-models and then engage in quite low-level coding in textual transformation scripting languages. This paper introduces a new approach to visualising source and target models that allows specifiers of complex data transformations to use the resultant visual notations for specifying transformations by example using drag and drop. We demonstrate the applicability of our new approach by an example case study.

关键词： Data visualization Visualization Data models Concrete Image color analysis Computational modeling software

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