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Faculty of Informatics - Papers (Archive)

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Articles 1 - 30 of 2013

Full-Text Articles in Physical Sciences and Mathematics

A Novel Approach To Data Deduplication Over The Engineering-Oriented Cloud Systems, Zhe Sun, Jun Shen, Jianming Young Jan 2013

A Novel Approach To Data Deduplication Over The Engineering-Oriented Cloud Systems, Zhe Sun, Jun Shen, Jianming Young

Faculty of Informatics - Papers (Archive)

This paper presents a duplication-less storage system over the engineering-oriented cloud computing platforms. Our deduplication storage system, which manages data and duplication over the cloud system, consists of two major components, a front-end deduplication application and a mass storage system as back-end. Hadoop distributed file system (HDFS) is a common distribution file system on the cloud, which is used with Hadoop database (HBase). We use HDFS to build up a mass storage system and employ HBase to build up a fast indexing system. With a deduplication application, a scalable and parallel deduplicated cloud storage system can be effectively built up. …

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Identity-Based Traitor Tracing With Short Private Key And Short Ciphertext, Fuchun Guo, Yi Mu, Willy Susilo Dec 2012

Identity-Based Traitor Tracing With Short Private Key And Short Ciphertext, Fuchun Guo, Yi Mu, Willy Susilo

Faculty of Informatics - Papers (Archive)

Identity-based traitor tracing (IBTT) scheme can be utilized to identify a private (decryption) key of any identity that is illegally used in an identity-based broadcast encryption scheme. In PKC'07, Abdalla et al. proposed the first IBTT construction with short private key. In CCS'08, Boneh and Naor proposed a public-key traitor tracing, which can be extended to IBTT with short ciphertext. With a further exploration, in this paper, we propose the first IBTT with short private key and short ciphertext. Private key and ciphertext are both order of O(l 1+l 2), where l 1 is the bit length of codeword of …

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Implementing Vertical And Horizontal Engineering Students' Integration And Assessment Of Consequence Academic Achievement, Sarim Al-Zubaidy, Nidhal Abdulaziz, Reza Dashtpour Jul 2012

Implementing Vertical And Horizontal Engineering Students' Integration And Assessment Of Consequence Academic Achievement, Sarim Al-Zubaidy, Nidhal Abdulaziz, Reza Dashtpour

Faculty of Informatics - Papers (Archive)

Recent scholarship references indicate that integration of the student body can result in an enhanced learning experience for students and also greater satisfaction. This paper reports the results of a case study whereby mechanical engineering students studying at a newly established branch campus in Dubai of a British university were exposed to vertical and horizontal integration. Different activities have been embedded to ensure that students integrated and worked together with their peers and colleagues at different levels. The implemented processes and practices led to improved academic achievements, which were better than those of a similar cohort of students where no …

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Determinants Of Rfid Technology Adoption Intention In The Saudi Retail Industry: An Empirical Study, Salem Alqahtani, S. F. Wamba Jan 2012

Determinants Of Rfid Technology Adoption Intention In The Saudi Retail Industry: An Empirical Study, Salem Alqahtani, S. F. Wamba

Faculty of Informatics - Papers (Archive)

Drawing both on innovation diffusion theory and Radio frequency identification (RFID) technology, this paper assesses the influence of a set of determinants on the intention of Saudi Arabian retail firms to adopt RFID technology. In this study, a two-phase, multi-method approach was used. In the first phase, an interview-based case study was used, while in the second phase, we conducted a survey to gather data from 7 large retailers in Saudi Arabia. Our findings indicate that while the RFID relative advantage, the top management support and information intensity do not have any influence on the intention of Saudi Arabia retail …

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Aged Care It In Australia-The Past, Present And Future, Ping Yu Jan 2012

Aged Care It In Australia-The Past, Present And Future, Ping Yu

Faculty of Informatics - Papers (Archive)

This paper reviews the development of aged care IT innovations in Australia in the past decade. It starts with a brief description of the establishment of the Aged Care eConnect project by the Commonwealth Department of Health and Ageing to promote aged care IT. This is followed by a snapshot of the aged care associations' and research groups' promotional activities. The roles of government, industry peak bodies, aged care providers, aged care IT application providers and researchers for the diffusion of aged care IT innovations are analysed.

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Combining Outputs From The North American Regional Climate Change Assessment Program By Using A Bayesian Hierarchical Model, Emily L. Kang, Noel Cressie, Stephan R. Sain Jan 2012

Combining Outputs From The North American Regional Climate Change Assessment Program By Using A Bayesian Hierarchical Model, Emily L. Kang, Noel Cressie, Stephan R. Sain

Faculty of Informatics - Papers (Archive)

We investigate the 20-year-average boreal winter temperatures generated by an ensemble of six regional climate models (RCMs) in phase I of the North American Regional Climate Change Assessment Program. We use the long-run average (20-year integration) to smooth out variability and to capture the climate properties from the RCM outputs. We find that, although the RCMs capture the large-scale climate variation from coast to coast and from south to north similarly, their outputs can differ substantially in some regions. We propose a Bayesian hierarchical model to synthesize information from the ensemble of RCMs, and we construct a consensus climate signal …

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New Constructions Of Osbe Schemes And Their Applications In Oblivious Access Control, Jinguang Han, Willy Susilo, Yi Mu, Jun Yan Jan 2012

New Constructions Of Osbe Schemes And Their Applications In Oblivious Access Control, Jinguang Han, Willy Susilo, Yi Mu, Jun Yan

Faculty of Informatics - Papers (Archive)

Oblivious signature-based envelope (OSBE) schemes have demonstrated their potential applications in the protection of users privacy and rights. In an OSBE protocol, an encrypted message can only be decrypted by the receiver who holds a valid signature on a public message, while the sender (encrypter) does not know whether the receiver has the signature or not. Our major contributions in this work lie in the following aspects. We improve the notion of OSBE so that a valid credential holder cannot share his/her credential with other users (i. e., all-or-nothing non-transferability). We clarify the relationship between one-round OSBE and identity-based encryption …

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Grounding Locations Assessment Of Practical Power System, Nadheer Shalash, Ahmed M. Haidar, Abdul Sattar Jan 2012

Grounding Locations Assessment Of Practical Power System, Nadheer Shalash, Ahmed M. Haidar, Abdul Sattar

Faculty of Informatics - Papers (Archive)

Grounding Points (GPs) are installed in electrical power system to drive protective devices and accomplish the person- nel safety. The general grounding problem is to find the optimal locations of these points so that the security and reli- ability of power system can be improved. This paper presents a practical approach to find the optimal location of GPs based on the ratios of zero sequence reactance with positive sequence reactance (X0/X1), zero sequence resistance with positive sequence reactance (R0/X1) and Ground Fault Factor (GFF). The optimal values of these indicators were deter- mined by considering several scenarios of fault disturbances …

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Perfect Ambiguous Optimistic Fair Exchange, Yang Wang, Man Ho Allen Au, Willy Susilo Jan 2012

Perfect Ambiguous Optimistic Fair Exchange, Yang Wang, Man Ho Allen Au, Willy Susilo

Faculty of Informatics - Papers (Archive)

Protocol for fair exchange of digital signatures is essential in many applications including contract signing, electronic commerce, or even peer-to-peer file sharing. In such a protocol, two parties, Alice and Bob, would like to exchange digital signatures on some messages in a fair way. It is known that a trusted arbitrator is necessary in the realization of such a protocol. We identify that in some scenarios, it is required that prior to the completion of the protocol, no observer should be able to tell whether Alice and Bob are conducting such an exchange. Consider the following scenario in which Apple …

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An Experimental Determination Of Perceived Liveability In Sydney, Mohammad-Reza Namazi-Rad, Pascal Perez, Matthew Berryman, Francois Lamy Jan 2012

An Experimental Determination Of Perceived Liveability In Sydney, Mohammad-Reza Namazi-Rad, Pascal Perez, Matthew Berryman, Francois Lamy

Faculty of Informatics - Papers (Archive)

The term liveability is used to evaluate the quality of life in a region based on the surrounding physical environment and different location-based social elements. Having a reliable measurement of general well-being of individuals and societies can help the government and non-government organizations planning for better infrastructure. However, a variety of factors can impact the social perception of local environmental conditions, many of which are difficult to measure. This makes different liveability concepts quite challenging to be evaluated. In collaboration with the IRIS Research, we have conducted a Computer Assisted Telephone Interviewing (CATI) survey on perceived liveability. This measures the …

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Intelligent Load Management In Microgrids, J Kennedy, Philip Ciufo, Ashish Agalgaonkar Jan 2012

Intelligent Load Management In Microgrids, J Kennedy, Philip Ciufo, Ashish Agalgaonkar

Faculty of Informatics - Papers (Archive)

The increased levels of distributed generator (DG) penetration and the customer demand for high levels of reliability have attributed to the formation of the Microgrid concept. The Microgrid concept contains a variety of technical challenges, including load management and anti-islanding protection discrimination strategies. This paper provides a novel scheme in which loads and DG are able to detect the conditions where the load of the island cannot be sufficiently supplied. In these instances, a load shedding algorithm systematically removes loads from the system until an island can be maintained within satisfactory operating limits utilising the local DG. The concept of …

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Efficient Fair Conditional Payments For Outsourcing Computations, Xiaofeng Chen, Jin Li, Willy Susilo Jan 2012

Efficient Fair Conditional Payments For Outsourcing Computations, Xiaofeng Chen, Jin Li, Willy Susilo

Faculty of Informatics - Papers (Archive)

The outsourcing computations in distributed environments suffer from the trust problems between the outsourcer and the workers. All existing solutions only assume the rational lazybut- honest workers. In this paper, we first introduce the rational lazy-and-partially-dishonest workers in the outsourcing computation model. In addition, we propose a new fair conditional payment scheme for outsourcing computation that is only based on traditional electronic cash systems. The proposed construction uses a semitrusted third party T to achieve the fairness and efficiency. However, is only involved in the protocol in the exceptional case, namely in the case of disputes. Moreover, since neither the …

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Location Privacy Under Dire Threat As 'Uberveillance' Stalks The Streets, Katina Michael, Roger Clarke Jan 2012

Location Privacy Under Dire Threat As 'Uberveillance' Stalks The Streets, Katina Michael, Roger Clarke

Faculty of Informatics - Papers (Archive)

Citizen consent and issues surrounding location-based people-tracking - location-tracking - smart phones - covert tracking - CCTV cameras - mobile phones - warrantless tracking - Australian Mobile Telecommunications Association (AMTA) new industry guidelines - compliance with privacy legislation - need for a location privacy protection act or GPS act.

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Editorial: Social Implications Of Technology: "Il Buono, Il Brutto, Il Cattivo", Katina Michael Jan 2012

Editorial: Social Implications Of Technology: "Il Buono, Il Brutto, Il Cattivo", Katina Michael

Faculty of Informatics - Papers (Archive)

Late last year, IEEE SSIT was invited to put together a paper for the centennial edition of the Proceedings of the IEEE for publication in May 2012 [1]. The article, "Social Implications of Technology: Past, Present, and Future," brought together five members of SSIT with varying backgrounds, and involved two intense months of collaboration and exchange of ideas. I personally felt privileged to be working with Karl D. Stephan, Emily Anesta, Laura Jacobs, and M.G. Michael on this project.

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Human Rights, Regulation, And National Security (Introduction), Simon Bronitt, Katina Michael Jan 2012

Human Rights, Regulation, And National Security (Introduction), Simon Bronitt, Katina Michael

Faculty of Informatics - Papers (Archive)

Law disciplines technology, though it does so in a partial and incomplete way. This fact is refl ected in the old adage that technology outstrips the capacity of law to regulate it. The rise of new technologies poses a signifi cant threat to human rights. The pervasive use of closedcircuit television (CCTV), as well as mobile CCTV, telecommunications interception, and low-cost audiovisual recording and tracking devices (some of these discreetly wearable), extend the power of the state and corporations to signifi cantly intrude into the lives of citizens.

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You Talkin' To Me?, Katina Michael Jan 2012

You Talkin' To Me?, Katina Michael

Faculty of Informatics - Papers (Archive)

Advancing knowledge through robust research is an honourable aim- being scientific, finding the right methodology, executing project phases meticulously, and reporting on the outcomes as objectively and accurately as possible. But may I begin my inaugural editorial by saying that an even higher ideal to advancing knowledge is critiquing it as it happens. Reflective practice is not just something to be done by academics in their teaching- reflective practice is what we should all be doing as we go about undertaking our various day-to-day work tasks. For the engineer engaged in research and development, whether in industry or government, reflective …

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Rfid-Enabled Healthcare Applications, Issues And Benefits: An Archival Analysis (1997-2011), S F. Wamba Jan 2012

Rfid-Enabled Healthcare Applications, Issues And Benefits: An Archival Analysis (1997-2011), S F. Wamba

Faculty of Informatics - Papers (Archive)

In this paper, a comprehensive review of articles published between 1997 and 2011 in the Journal of Medical Systems (JMS) on RFID technology is presented. A total of 22 papers are analyzed using a classification framework that has three dimensions: RFID-enabled healthcare applications, RFID-enabled healthcare issues, and RFID-enabled healthcare benefits. In addition, an invitation sent to all authors of the papers accepted for the special issue on RFID for the JMS allows them to position their various papers within the classification framework. Finally, a list of future research directions is presented.

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Business Value Of Rfid-Enabled Healthcare Transformation Projects, Anand Abijith, S. F. Wamba Jan 2012

Business Value Of Rfid-Enabled Healthcare Transformation Projects, Anand Abijith, S. F. Wamba

Faculty of Informatics - Papers (Archive)

Purpose – This paper aims to assess the business value realised from radio frequency identification (RFID)-enabled healthcare transformation projects as compared with other industries. The paper starts with a review of RFID technology in the healthcare industry and further extends to an in-depth analysis of mini-case studies collected from RFID Journal, a leading professional journal dedicated to RFID technology, in order to identify the major benefits of the implementation of RFID systems as well as its business value achieved. In addition, there is further analysis that is being carried out on other industries to have an overview of the benefits …

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

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

Faculty of Informatics - Papers (Archive)

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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Attrition From Australian Ict Degrees - Why Women Leave, Madeleine R. H Roberts, Tanya J. Mcgill, Peter N. Hyland Jan 2012

Attrition From Australian Ict Degrees - Why Women Leave, Madeleine R. H Roberts, Tanya J. Mcgill, Peter N. Hyland

Faculty of Informatics - Papers (Archive)

Student attrition is of particular concern in the field of ICT because the industry faces staffing shortfalls, generally and a noticeable lack of female employees. This paper explores the reasons female students give for leaving their ICT courses. An online survey of early leavers from four Australian universities was conducted. The results show that, for many students, it is a combination of issues that leads to their withdrawal. Contrary to expectations, few female ex-students had experienced serious life events that necessitated their withdrawal or indicated that negative behaviour or attitudes had contributed to their decision to leave. More commonly female …

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Evaluating The Volatility Forecasting Performance Of Best Fitting Garch Models In Emerging Asian Stock Markets, Chaiwat Kosapattarapim, Yan-Xia Lin, Michael Mccrae Jan 2012

Evaluating The Volatility Forecasting Performance Of Best Fitting Garch Models In Emerging Asian Stock Markets, Chaiwat Kosapattarapim, Yan-Xia Lin, Michael Mccrae

Faculty of Informatics - Papers (Archive)

While modeling the volatility of returns is essential for many areas of finance, it is well known that financial return series exhibit many non-normal characteristics that cannot be captured by the standard GARCH model with a normal error distribution. But which GARCH model and which error distribution to use is still open to question, especially where the model that best fits the in-sample data may not give the most effective out-of-sample volatility forecasting ability. Approach: In this study, six simulated studies in GARCH(p,q) with six different error distributions are carried out. In each case, we determine the best fitting GARCH …

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A Novel Scheduler For Concurrent Tx/Rx Wireless Mesh Networks With Weighted Links, Kwan-Wu Chin, Sieteng Soh, Chen Meng Jan 2012

A Novel Scheduler For Concurrent Tx/Rx Wireless Mesh Networks With Weighted Links, Kwan-Wu Chin, Sieteng Soh, Chen Meng

Faculty of Informatics - Papers (Archive)

This paper considers the NP-hard problem of scheduling weighted links in concurrent transmit/receive wireless mesh networks. The problem generalizes existing works to links with weight wij ≥ 1. We propose an O(|V|2) algorithm, where V is the set of routers, that is orders of magnitude faster than computationally intensive approaches that use the well-known Goemans-Williamson (GWA)'s maximum cut algorithm and also brute-force. Our algorithm generates schedules, on average, with at most 3% and 9% fewer links than the GWA and brute-force approaches respectively.

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Efficient Oblivious Transfers With Access Control, Jinguang Han, Willy Susilo, Yi Mu, Jun Yan Jan 2012

Efficient Oblivious Transfers With Access Control, Jinguang Han, Willy Susilo, Yi Mu, Jun Yan

Faculty of Informatics - Papers (Archive)

Oblivious transfer (OT) is a protocol where a receiver can obtain t-out-of-n services from the sender without releasing anything about his choices. OT can be used to protect user’s privacy. In principle, any user can interact with a server to request some services. This might allow some undesirable users to obtain services from the server. How to ensure that only the authorized receivers can obtain services obliviously is a daunting task. In this paper, we introduce oblivious signature based-on envelope (OSBE) to OT and propose two novel OT schemes, which only allow the legitimate receivers to obtain services obliviously. The …

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Further Analysis Of A Practical Hierarchical Identity-Based Encryption Scheme, Ying Sun, Yong Yu, Yi Mu Jan 2012

Further Analysis Of A Practical Hierarchical Identity-Based Encryption Scheme, Ying Sun, Yong Yu, Yi Mu

Faculty of Informatics - Papers (Archive)

No abstract provided.

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A Survey On Bio-Inspired Algorithms For Web Service Composition, Lijuan Wang, Jun Shen, Jianming Yong Jan 2012

A Survey On Bio-Inspired Algorithms For Web Service Composition, Lijuan Wang, Jun Shen, Jianming Yong

Faculty of Informatics - Papers (Archive)

Web service composition has become a promis- ing technology in a variety of e-science or e-business areas. There are a variety of models and methods to deal with this issue from dierent aspects. Bio-inspired algorithms are becoming main approaches and solutions. This paper reviews the current researches on web service composition based on bio-inspired algorithms, such as Ant Colony Opti- mization(ACO), Genetic Algorithm(GA), Evolutionary Al- gorithm(EA) and Particle Swarm Optimization(PSO). By analyzing and investigating dierent approaches, this paper gives an overview about the researches on bio-inspired al- gorithm in web service composition and point out future directions.

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Efficient And Secure Stored-Value Cards With Leakage Resilience, Fuchun Guo, Yi Mu, Willy Susilo Jan 2012

Efficient And Secure Stored-Value Cards With Leakage Resilience, Fuchun Guo, Yi Mu, Willy Susilo

Faculty of Informatics - Papers (Archive)

Stored-value cards (SVCs) are a kind of smartcards that can be used to store monetary values. SVCs have demonstrated a wide range of applications in commerce. SVCs are in general tamper-resistant, but they are very computationally weak and their security mechanisms are also weak against side-channel attacks. In this paper, we propose an efficient and secure stored-value card system. With the help of pre-computations, storedvalue cards in our scheme are only required to perform simple arithmetic operations and bitwise comparisons. Our system especially for SVCs is secure with unbounded computational leakage resilience. Our novel scheme provides a practical solution to …

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Frequency Selection In Absolute Phase Maps Recovery With Two Frequency Projection Fringes, Yi Ding, Jiangtao Xi, Yanguang Yu, Wengqing Cheng, Shu Wang, Joe F. Chicharo Jan 2012

Frequency Selection In Absolute Phase Maps Recovery With Two Frequency Projection Fringes, Yi Ding, Jiangtao Xi, Yanguang Yu, Wengqing Cheng, Shu Wang, Joe F. Chicharo

Faculty of Informatics - Papers (Archive)

In a recent published work we proposed a technique to recover the absolute phase maps of two fringe patterns with different spatial frequencies. It is demonstrated that a number of selected frequency pairs can be used for the proposed approach, but the published work did not provide a guideline for frequency selection. In addition, the performance of the proposed technique in terms of its anti-noise capability is not addressed. In this paper, the rules for selecting the two frequencies are presented based on theoretical analysis of the proposed technique. Also, when the two frequencies are given, the anti-noise capability of …

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Surface Diffusion Flow Near Spheres, Glen Wheeler Jan 2012

Surface Diffusion Flow Near Spheres, Glen Wheeler

Faculty of Informatics - Papers (Archive)

We consider closed immersed hypersurfaces evolving by surface diffusion flow, and perform an analysis based on local and global integral estimates. First we show that a properly immersed stationary (ΔH ≡ 0) hypersurface in R3 or R4 with restricted growth of the curvature at infinity and small total tracefree curvature must be an embedded union of umbilic hypersurfaces. Then we prove for surfaces that if the L2 norm of the tracefree curvature is globally initially small it is monotonic nonincreasing along the flow.We also derive pointwise estimates for all derivatives of the curvature assuming that its L …

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Fault Analysis Of The Katan Family Of Block Ciphers, Shekh Faisal Abdul-Latip, Mohammad Reza Reyhanitabar, Willy Susilo, Jennifer Seberry Jan 2012

Fault Analysis Of The Katan Family Of Block Ciphers, Shekh Faisal Abdul-Latip, Mohammad Reza Reyhanitabar, Willy Susilo, Jennifer Seberry

Faculty of Informatics - Papers (Archive)

In this paper, we investigate security of the KATAN family of block ciphers against differential fault attacks. KATAN consists of three variants with 32, 48 and 64-bit block sizes, called KATAN32, KATAN48 and KATAN64, respectively. All three variants have the same key length of 80 bits. We assume a single-bit fault injection model where the adversary is supposed to be able to corrupt a single random bit of the internal state of the cipher and this fault induction process can be repeated (by resetting the cipher); i.e., the faults are transient rather than permanent. First, we show how to identify …

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Estimating Variance Components And Predicting Breeding Values For Eventing Disciplines And Grades In Sport Horses, I D. Stewart, I.M S. White, Arthur R. Gilmour, R Thompson, J A. Woolliams, S Brotherstone Jan 2012

Estimating Variance Components And Predicting Breeding Values For Eventing Disciplines And Grades In Sport Horses, I D. Stewart, I.M S. White, Arthur R. Gilmour, R Thompson, J A. Woolliams, S Brotherstone

Faculty of Informatics - Papers (Archive)

Eventing competitions in Great Britain (GB) comprise three disciplines, each split into four grades, yielding 12 discipline-grade traits. As there is a demand for tools to estimate (co)variance matrices with a large number of traits, the aim of this work was to investigate different methods to produce large (co)variance matrices using GB eventing data. Data from 1999 to 2008 were used and penalty points were converted to normal scores. A sire model was utilised to estimate fixed effects of gender, age and class, and random effects of sire, horse and rider. Three methods were used to estimate (co)variance matrices. Method …

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