Physical Sciences and Mathematics Commons^™

The Interactions Among Information Technology Organizational Learning, Project Learning, And Project Success, Donald Stuart Mckay

CCE Theses and Dissertations

Knowledge gained from completed information technology (IT) projects was not often shared with emerging project teams. Learning lessons from other project teams was not pursued because people lack time, do not see value in learning, fear a potentially painful process, and had concerns that sharing knowledge will hurt their career. Leaders could change the situation; however organizational leaders have not seen value in project learning and have not made it a priority. Yet, if a relationship existed among IT project success variables (PSVs) organizational learning factors (OLFs) and project learning practices (PLPs) then IT leaders may take greater interest in …

Understanding The Value Of Enterprise Architecture For Organizations: A Grounded Theory Approach, Edwin Frank Nassiff

CCE Theses and Dissertations

There is a high rate of information system implementation failures attributed to the lack of alignment between business and information technology strategy. Although enterprise architecture (EA) is a means to correct alignment problems and executives highly rate the importance of EA, it is still not used in most organizations today. Current literature only gave anecdotal reasons why EA was not more widely adopted. This study explored the problem of EA underutilization by understanding how organizational executives value EA.

This research used the grounded theory methodology to obtain the EA perspectives of organizational executives responsible for EA. Seventeen executives were selected …

Minimizing Recommended Error Costs Under Noisy Inputs In Rule-Based Expert Systems, Forest D. Thola

CCE Theses and Dissertations

This dissertation develops methods to minimize recommendation error costs when inputs to a rule-based expert system are prone to errors. The problem often arises in web-based applications where data are inherently noisy or provided by users who perceive some benefit from falsifying inputs. Prior studies proposed methods that attempted to minimize the probability of recommendation error, but did not take into account the relative costs of different types of errors. In situations where these differences are significant, an approach that minimizes the expected misclassification error costs has advantages over extant methods that ignore these costs.

Building on the existing literature, …

An Empirical Assessment Of Factors Contributing To Individuals' Propensity To Commit Software Piracy In The Bahamas, Raymond Cleophas Wells

CCE Theses and Dissertations

Researchers have found that software piracy worldwide over the years has significantly contributed to billions of dollars in lost revenue for many software firms. Software developers have found it difficult to create software that is not easily copied, thus, creating a software protection problem. Software piracy remains a global problem despite the significant effort to combat its prevalence.

Over the years, significant research has attempted to determine the factors that contribute to individuals' propensity to commit software piracy. Most of the research on software piracy has been limited to larger societies, with recommendations by researchers to extend similar studies to …

Instructional Strategies And Activities That Inform The Community Of Inquiry (Coi) Framework, Stephan D. Junion

CCE Theses and Dissertations

The Community of Inquiry (CoI) framework is one of the more widely used frameworks supporting online learning effectiveness. While there has been extensive research on the development and validation of the CoI framework and survey, less attention has been devoted toward implementation of a CoI and how practitioners design instructional strategies and activities that support this type of constructivist online learning environment.

The research literature about the CoI along with phenomenological interviews with expert designers guided the creation of three products: the Community of Inquiry (CoI) Instructional Strategies and Activities Guide, Community of Inquiry (CoI) Instructional Strategies and Activities Job …

Acoustic Sensing Of Gas Seeps In The Deep Ocean With Split-Beam Echosounders, Thomas C. Weber, Kevin W. Jerram, Larry A. Mayer

Center for Coastal and Ocean Mapping

When in the form of free gas in the water column, methane seeps emanating from the seabed are strong acoustic targets that are often detectable from surface vessels using echo sounders.In addition to detecting that a seep is present at some location, it is also desirable to characterize the nature of the seep in terms of its morphology and flux rates. Here, we examine how much we can learn about seeps in the deep (> 1000 m) northern Gulf of Mexico using narrow-band split-beam echo sounders operating at fixed frequencies (18 kHz and 38 kHz).Methane seeps in this region are …

International Observational Campaigns Of The Last Two Eclipses In Ee Cephei: 2003 And 2008/9, Cezary Galan, Peter Németh

Aerospace, Physics, and Space Science Faculty Publications

Context. EE Cep is an unusual long-period (5.6 yr) eclipsing binary discovered during the mid-twentieth century. It undergoes almost-grey eclipses that vary in terms of both depth and duration at different epochs. The system consists of a Be type star and a dark dusty disk around an invisible companion. EE Cep together with the widely studied ε Aur are the only two known cases of long-period eclipsing binaries with a dark, dusty disk component responsible for periodic obscurations. Aims. Two observational campaigns were carried out during the eclipses of EE Cep in 2003 and 2008/9 to verify whether the eclipsing …

Search For New Physics In Events With Same-Sign Dileptons And B-Tagged Jets In Pp Collisions At S√=7 Tev, The Cms Collaboration, S. Chatrchyan, Vardan Khachatryan, Marc M. Baarmand, B. Dorney, Marcus Hohlmann, Himali Kalakhety, Igor B. Vodopiyanov

Aerospace, Physics, and Space Science Faculty Publications

A search for new physics is performed using isolated same-sign dileptons with at least two b-quark jets in the final state. Results are based on a 4.98 fb⁻¹ sample of proton-proton collisions at a centre-of-mass energy of 7 TeV collected by the CMS detector. No excess above the standard model background is observed. Upper limits at 95% confidence level are set on the number of events from non-standard-model sources. These limits are used to set constraints on a number of new physics models. Information on acceptance and efficiencies are also provided so that the results can be used to …

Enhance Rule Based Detection For Software Fault Prone Modules, H. Najadat, Izzat M. Alsmadi

Computer Science Faculty Publications

Software quality assurance is necessary to increase the level of confidence in the developed software and reduce the overall cost for developing software projects. The problem addressed in this research is the prediction of fault prone modules using data mining techniques. Predicting fault prone modules allows the software managers to allocate more testing and resources to such modules. This can also imply a good investment in better design in future systems to avoid building error prone modules. Software quality models that are based upon data mining from previous projects can identify fault-prone modules in the current similar development project, once …

Measuring Defect Datasets Sensitivity To Attributes Variation, Izzat M. Alsmadi

Computer Science Faculty Publications

The study of the correlation between software project and product attributes and its modules quality status (faulty or not) is the subject of several research papers in the software testing and maintenance fields. In this paper, a tool is built to change the values of software data sets' attributes and study the impact of this change on the modules' defect status. The goal is to find those specific attributes that highly correlate with the module defect attribute. An algorithm is developed to automatically predict the module defect status based on the values of the module attributes and based on their …

Search For Quark Compositeness In Dijet Angular Distributions From Pp Collisions At √S = 7 Tev, S. Chatrchyan, Marc M. Baarmand, B. Dorney, Marcus Hohlmann, Himali Kalakhety, Igor Vodopiyanov, The Cms Collaboration

Aerospace, Physics, and Space Science Faculty Publications

A search for quark compositeness using dijet angular distributions from pp collisions at √s = 7 TeV is presented. The search has been carried out using a data sample corresponding to an integrated luminosity of 2.2 fb−1, recorded by the CMS experiment at the LHC. Normalized dijet angular distributions have been measured for dijet invariant masses from 0.4 TeV to above 3 TeV and compared with a variety of contact interaction models, including those which take into account the effects of next-to-leading-order QCD corrections. The data are found to be in agreement with the predictions of perturbative QCD, and lower …

The Agile Monitoring Of Cygnus X-3: Transient Gamma-Ray Emission And Spectral Constraints, Giovanni Piano, Diana Carina Hannikainen

Aerospace, Physics, and Space Science Faculty Publications

We present the AGILE-GRID (Astro-rivelatore Gamma a Immagini LEggero – Gamma-Ray Imaging Detector) monitoring of Cygnus X-3, during the period between November 2007 and July 2009. We report here the whole AGILE-GRID monitoring of Cygnus X-3 in the AGILE “pointing” mode data-taking, to confirm that the γ-ray activity coincides with the same repetitive pattern of multiwavelength emission and analyze in depth the overall γ-ray spectrum by assuming both leptonic and hadronic scenarios. Seven intense γ-ray events were detected in this period, with a typical event lasting one or two days. These durations are longer than the likely cooling times of …

J/Ψ And Ψ (2s) Production In Pp Collisions At √S = 7 Tev, S. Chatrchyan, Marc M. Baarmand, B. Dorney, Marcus Hohlmann, Himali Kalakhety, Igor Vodopiyanov, The Cms Collaboration

Aerospace, Physics, and Space Science Faculty Publications

A measurement of the J/ψ and ψ(2S) production cross sections in pp collisions at √s = 7TeV with the CMS experiment at the LHC is presented. The data sample corresponds to an integrated luminosity of 37 pb−1. Using a fit to the invariant mass and decay length distributions, production cross sections have been measured separately for prompt and non-prompt charmonium states, as a function of the meson transverse momentum in several rapidity ranges and integrated in the kinematical regions considered in this study. In addition, cross sections restricted to the acceptance of the CMS detector are given, which are not …

Search For Dark Matter And Large Extra Dimensions In Monojet Events In Pp Collisions At S√=7 Tev, The Cms Collaboration, S. Chatrchyan, V. Khachatryan, Marc M. Baarmand, B Dorney, Marcus Hohlmann, Himali Kalakhety, Igor Vodopiyanov

Aerospace, Physics, and Space Science Faculty Publications

A search has been made for events containing an energetic jet and an imbalance in transverse momentum using a data sample of pp collisions at a center-of-mass energy of 7 TeV. This signature is common to both dark matter and extra dimensions models. The data were collected by the CMS detector at the LHC and correspond to an integrated luminosity of 5.0 fb⁻¹. The number of observed events is consistent with the standard model expectation. Constraints on the dark matter-nucleon scattering cross sections are determined for both spin-independent and spin-dependent interaction models. For the spin-independent model, these are …

Search For Microscopic Black Holes In Pp Collisions At S√=7tev, The Cms Collaboration, S. Chatrchyan, V. Khachatryan, Marc M. Baarmand, B. Dorney, Marcus Hohlmann, Himali Kalakhety, Igor Vodopiyanov

Aerospace, Physics, and Space Science Faculty Publications

A search for microscopic black holes in pp collisions at a center-of-mass energy of 7 TeV is presented. The data sample corresponds to an integrated luminosity of 4.7 fb⁻¹ recorded by the CMS experiment at the LHC in 2011. Events with large total transverse energy have been analyzed for the presence of multiple energetic jets, leptons, and photons, which are typical signals of evaporating semiclassical and quantum black holes, and string balls. Agreement with the expected standard model backgrounds, which are dominated by QCD multijet production, has been observed for various combined multiplicities of jets and other reconstructed objects …

Jet Production Rates In Association With W And Z Bosons In Pp Collisions At √S = 7 Tev, S. Chatrchyan, Marc M. Baarmand, B. Dorney, Marcus Hohlmann, Himali Kalakhety, Igor Vodopiyanov, The Cms Collaboration

Aerospace, Physics, and Space Science Faculty Publications

Measurements of jet production rates in association with W and Z bosons for jet transverse momenta above 30 GeV are reported, using a sample of proton-proton collision events recorded by CMS at √s = 7TeV , corresponding to an integrated luminosity of 36 pb − 1. The study includes the measurement of the normalized inclusive rates of jets σ(V + ≥ n jets)/σ(V), where V represents either a W or a Z. In addition, the ratio of W to Z cross sections and the W charge asymmetry as a function of the number of associated jets are measured. A test …

Exclusive Γγ → Μ + Μ − Production In Proton-Proton Collisions At S√=7 Tev, The Cms Collaboration, S. Chatrchyan, V. Khachatryan, Marc M. Baarmand, B. Dorney, Marcus Hohlmann, Himali Kalakhety, Igor Vodopiyanov

Aerospace, Physics, and Space Science Faculty Publications

A measurement of the exclusive two-photon production of muon pairs in proton-proton collisions at s=7" role="presentation" style="box-sizing: inherit; display: inline; line-height: normal; word-spacing: normal; overflow-wrap: normal; text-wrap: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: relative;">s√=7�=7 TeV, pp → pμ ⁺ μ ⁻p, is reported using data corresponding to an integrated luminosity of 40 pb⁻¹. For muon pairs with invariant mass greater than 11.5 GeV, transverse momentum p T (μ) > 4 GeV and pseudorapidity |η(μ)| …

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.

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 …

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 …

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 …

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 …

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 …

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 …

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 …

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.

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.

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.

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 …

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.