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Current Search:
All of 'Computer' and 'Science' in all fields;
1663 items found
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Displaying Results 226 - 250 of 1663 on page 10 of 67
Marked
Mark
Designing telecommunication service management systems
(2006)
WADE, VINCENT PATRICK
Designing telecommunication service management systems
(2006)
WADE, VINCENT PATRICK
Abstract:
In today's telecommunication industry, the management of services is seen as a key enabler and differentiating factor in the flexible delivery of telecommunication solutions. Increased competition and globalisation of markets have created unique pressure on telecommunications service providers to support service oriented, reusable management components which can optimise the provisioning and adaptation of business and systems processes. This thesis proposes a model driven development strategy which provides integrated, but separate support for the development of reusable component designs as well as the flexible development of business process driven systems constructed using these reusable component designs. The thesis specifies two integrated development guidelines which comprise the methodology. The thesis also describes the validation and evaluation of the guidelines in two trials. These trials involve the development of a catalogue of component designs and the development ...
http://hdl.handle.net/2262/3558
Marked
Mark
Elimu 2.0: investigating the use of Web 2.0 for facilitating collaboration in Higher Education.
(2008)
Salehe, Bajuna R.
Elimu 2.0: investigating the use of Web 2.0 for facilitating collaboration in Higher Education.
(2008)
Salehe, Bajuna R.
Abstract:
The latest web innovations and technologies which has made the Web into a ‘Platform’, are become increasingly applied in the higher education arena. Tools such as Google docs, Google groups, Wikis, Blogs, RSS and Podcasting are gradually becoming more popular within higher education in teaching and learning. Yet their huge potentials have not been fully explored. Collaboration and knowledge sharing are common terms in higher education, and in the corporate world of the today’s knowledge economy. However better infrastructure and facilities that enable these important issues are yet to be set and fully utilised in higher education. In the higher education complex ideas of Computer Science subjects are still crucial in today’s technology-driven world. Hence teaching expertise of various Computer Science subjects need to be visible, accessible, and shared within. The purpose of this research is to investigate the usefulness of the latest web technologies and tools conventionally known ...
http://arrow.dit.ie/scschcomdis/8
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Mark
Aspect-Based Properties
(2008)
Lafferty, Donal
Aspect-Based Properties
(2008)
Lafferty, Donal
Abstract:
Component frameworks are said to support contextual composition when crosscutting functionality is bound to component instances by declarative selection of context properties, rather than through direct connections, such as method invocation, or derivation mechanisms, such as inheritance. Using contextual composition, component framework services such as synchronization, security and transaction support are bound to component instances via method interception. Here, the term component instance is an abstraction for whatever unit of interaction is used to access software component functionality be it an interface, an object or a set of objects. The mechanism for declarative selection can range from deployment descriptors, used with EJB Containers, to attribute-based annotations to source, used with CLR contexts of the .NET Framework. Contextual composition frameworks suffer from the lack of tailorability problem as well as the preplanning problem. Contextual composition is employed i...
http://hdl.handle.net/2262/24259
Marked
Mark
A Trust-Based Reputation Management System
(2008)
Gray, Elizabeth
A Trust-Based Reputation Management System
(2008)
Gray, Elizabeth
Abstract:
Since its inception in the early 1990s, e-commerce in consumer-to-consumer (C2C) markets has achieved great success, with significant projected growth. For example, the Internet auction provider, eBay, has established itself as the largest global player in this market, with $34.2 billion worth of merchandise being auctioned in 2004 and 135 million registered users in 32 markets worldwide. The C2C domain, analogous to its conventional physical marketplace equivalent, is built on trust. Buyers send payments to complete strangers from whom they have purchased goods and trust that the goods will be sent in return. Sellers trust buyers to make good on their payments. All users risk loss, both financial and of their time. Users establish reputations about their trustworthiness through an integrated feedback collection and distribution system, i.e., a reputation management system. Thus, an online marketplace approximates its traditional predecessors as a system in which the human concepts ...
http://hdl.handle.net/2262/24260
Marked
Mark
Agent Based Modeling in Computer Graphics and Games
(2009)
MacNamee, Brian
Agent Based Modeling in Computer Graphics and Games
(2009)
MacNamee, Brian
Abstract:
In the Encyclopedia of Complexity and Systems Science, (Ed: Robert A . Meyers), Springer.
As graphics technology has improved in recent years, more and more importance has been placed on the behavior of virtual characters in applications set in virtual worlds in areas such as games, movies and simulations. The behavior of virtual characters should be believable in order to create the illusion that these virtual worlds are populated with living characters. This has led to the application of agent-based modeling to the control of these virtual characters. There are a number of advantages of using agent-based modeling techniques which include the fact that they remove the requirement for hand controlling all agents in a virtual environment, and allow agents in games to respond to unexpected actions by players.
http://arrow.dit.ie/scschcombk/1
Marked
Mark
A behavioural analysis of computer game playing competence, experience and related physiological processes
(2008)
Linehan, Conor
A behavioural analysis of computer game playing competence, experience and related physiological processes
(2008)
Linehan, Conor
Abstract:
The current research programme represents a rst step in the psychological analysis of on-line game playing. In the literature review presented in Chapter 1, Network Latency and 'game challenge' were identied as two important variables affecting participants' enjoyment of on-line games. The experiments presented in Chapter 2 define 'game challenge' in terms of levels of derived relational responding, and found that participants were able to consistently respond in accordance with both one and three-node derived relations in the context of a computer game. The presence of Network Latency in a game was found to be detrimental to the game playing experience, but increasing the length of those delays was not. The experiments presented in Chapter 3 defined 'game challenge' in terms of more complex forms of derived relational responding and found that participants were able to consistently respond in accordance with derived 'Same' and 'Oppo...
http://eprints.nuim.ie/1478/
Marked
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Learning games programming with Dalek World.
(2005)
Duggan, Bryan; McAtamney, Hugh; Mtenzi, Fredrick
Learning games programming with Dalek World.
(2005)
Duggan, Bryan; McAtamney, Hugh; Mtenzi, Fredrick
Abstract:
<p>From September 2005 the School of Computing in the DIT will offer an elective in computer games programming to final year computer science students. This paper demonstrates how students will learn games programming by developing a 3D FPS (First Person Shooter) called Dalek World. Dalek World is developed using Microsoft Visual Studio in C++ and was originally developed by the authors to learn games programming techniques themselves. In developing Dalek World, students will learn Euclidian geometry, 3D graphics programming, object orientated game design, level loading, physics, collision detection, the A* algorithm, perception and enemy AI using finite state machines.</p>
http://arrow.dit.ie/scschcomcon/33
Marked
Mark
Towards Optimized Data Fetching for Service Discovery
(2007)
Zaremba, Maciej; Vitvar, Tomas; Moran, Matthew
Towards Optimized Data Fetching for Service Discovery
(2007)
Zaremba, Maciej; Vitvar, Tomas; Moran, Matthew
Abstract:
The advent of Service Oriented Architecture makes services the most flexible, platform-independent choice for exposing and integrating business functionality across a network. However, the lack of service discovery mechanisms, that go beyond simple keyword search to enable automated late-binding of service requesters to providers, remains a major problem. Realistic late-binding involves matchmaking of client requests with service descriptions, based on frequently changing fine-grained client requests, and dynamically changing service functionality. The intricacies of service functionality cannot be specified by generic static descriptions since the functionality offered by the service may depend on the client at hand, their specific request and the service¿s current capabilities. In this paper, we pro- pose a semantic framework supporting dynamic data fetching from services during the discovery phase on service instance level entailing a communication overhead which we aim to minimize.
http://hdl.handle.net/10379/435
Marked
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A study of the RF characteristics for wireless sensor deployment in building environment
(2009)
Jafer, Essa; O'Flynn, Brendan; Ó Mathúna, S. Cian; Špinar, Rostislav
A study of the RF characteristics for wireless sensor deployment in building environment
(2009)
Jafer, Essa; O'Flynn, Brendan; Ó Mathúna, S. Cian; Špinar, Rostislav
Abstract:
Science Foundation Ireland (CSET - Centre for Science, Engineering and Technology); Science Foundation Ireland (National Access Programme); Enterprise Ireland
Published Version
In this paper, The radio Frequency (RF) Monitoring and Measurement of the Environmental Research Institute (ERI) located in Cork city will be monitored and analyzed in both the Zigbee (2.44 GHz) and the industrial, scientific and medical (ISM 433 MHz). The main objective of this survey is to confirm what the noise and interferences threat signals exist in these bands. It was agreed that the surveys would be carried out in 5 different rooms and areas that are candidates for the Wireless Sensors deployments. Based on the carried on study, A Zigbee standard Wireless Sensor Network (WSN) will be developed employing a number of motes for sensing number of signals like temperature, light and humidity beside the RSSI and battery voltage monitoring. Such system will be used later on to control and improve ind...
http://hdl.handle.net/10468/155
Marked
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Robust Feature Correspondences from a Large Set of Unsorted Wide Baseline Images
(2009)
Cao, Yanpeng; McDonald, John
Robust Feature Correspondences from a Large Set of Unsorted Wide Baseline Images
(2009)
Cao, Yanpeng; McDonald, John
Abstract:
Given a set of unordered images taken in a wide area, an effective solution is proposed for establishing robust feature correspondences among them. Two major improvements are made in our work as follows: firstly, a robust technique is proposed for the self-organization of a large number of images without spatial orderings; secondly, a novel wide-baseline matching approach is developed to obtain good correspondences over images taken from substantially different viewpoints. The output consists of many sets of reliable pair-wise feature correspondences which are essential in various computer vision applications. Realistic experiments were carried out to evaluate the performances of the proposed method by using a large amount of images captured from our university’s campus.
http://eprints.nuim.ie/2326/
Marked
Mark
Reactiveness and navigation in computer games : different needs, different approaches
(2011)
Perez, Diego; Nicolau, Miguel; O'Neill, Michael; Brabazon, Anthony
Reactiveness and navigation in computer games : different needs, different approaches
(2011)
Perez, Diego; Nicolau, Miguel; O'Neill, Michael; Brabazon, Anthony
Abstract:
This paper presents an approach to the Mario AI Benchmark problem, using the A* algorithm for navigation, and an evolutionary process combining routines for the reactiveness of the resulting bot. The Grammatical Evolution system was used to evolve Behaviour Trees, combining both types of routines, while the highly dynamic nature of the environment required specific approaches to deal with over-fitting issues. The results obtained highlight the need for specific algorithms for the different aspects of controlling a bot in a game environment, while Behaviour Trees provided the perfect representation to combine all those algorithms.
http://hdl.handle.net/10197/3520
Marked
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Towards a reference architecture for Semantic Web applications
(2009)
Heitmann, Benjamin; Hayes, Conor; Oren, Eyal
Towards a reference architecture for Semantic Web applications
(2009)
Heitmann, Benjamin; Hayes, Conor; Oren, Eyal
Abstract:
The Semantic Web currently has two complementary architectural approaches: ¿Bottom-up¿ emergent best practices by the community and ¿top-down¿ prescriptive standards by standards bodies, leaving a gap regarding the concrete implementation of Semantic Web technologies. Based on the Web Science approach of combining empirical analysis with engineering, we are proposing to fill this gap with a reference architecture consisting of seven reusable and domain independent components, extracted from applications submitted at key demonstration challenges in the Semantic Web domain. The reference architecture can be used (1) as a common terminology for communicating concepts and issues related to the implementation of Semantic Web technologies, and (2) as a blueprint when implementing SemanticWeb applications.
http://hdl.handle.net/10379/563
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The Use of the European Computer Driving Licence (ECDL) as an IT training package in Irish universities
(2002)
Fallon, Helen
The Use of the European Computer Driving Licence (ECDL) as an IT training package in Irish universities
(2002)
Fallon, Helen
Abstract:
This paper explains the structure and outlines the origins of the European Computer Driving Licence. It presents some current figures on participation and completion rates and explains how the ECDL test centre accreditation system works. Brief details of the ECDL courseware packages currently used by Irish universities are given, followed by a short overview of the operation of ECDL in Irish universities.
http://eprints.nuim.ie/11/
Marked
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Introducing security aspects with model transformation
(2005)
FOX, JORGE; Jürjens, Jan
Introducing security aspects with model transformation
(2005)
FOX, JORGE; Jürjens, Jan
Abstract:
peer-reviewed
Aspect Oriented Programming and subsequently Aspect Oriented Software Development have received great attention recently and constitutes an interesting field of research in computer science. The goal of this paper is to propose a more precise understanding of aspects based on the idea of crosscutting concerns in view of model transformation. This proposal considers security aspects as an example of a behavior applied over a desired software product. This implies improving the actual definition of aspects. The work introduces the main current concepts of aspect, defines aspects as behavioral entities, presents examples, and outlines a method for model transformation based on the proposed definition.
http://hdl.handle.net/2262/17180
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Designing novel applications inspired by emerging media technologies
(2011)
Lee, Hyowon; Smeaton, Alan F.
Designing novel applications inspired by emerging media technologies
(2011)
Lee, Hyowon; Smeaton, Alan F.
Abstract:
The field of Human-Computer Interaction provides a number of useful tools and methods for obtaining information on end-users and their usage context to inform the design of computer systems, yet relatively little is known on how to go about designing for a completely novel application where there is no user base, no existing practice of use available at the start. The success of the currently available HCI methodology that focuses on understanding users’ needs and establishing requirements is well-deserved in making computing applications usable in terms of fitting them to end-users’ usage contexts. However, too much emphasis on identifying user needs tends to stifle other more exploratory design activities where new types of applications are invented in order to discover or create new activities currently not practiced. In this paper, we argue that a great starting point of novel application design is not the problem space (trying to rigorously define the user requirements) but the...
http://doras.dcu.ie/16457/
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Mark
Specification de services dans une logique temporelle compositionnelle
(1996)
Gibson, Paul; Mermet, B; Mokhtari, Y
Specification de services dans une logique temporelle compositionnelle
(1996)
Gibson, Paul; Mermet, B; Mokhtari, Y
Abstract:
Rapport de fin du lot1 du march© no96 1B CNET-CNRS-CRIN, Centre de Recherche en Informatique de Nancy.
http://eprints.nuim.ie/17/
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Therapeutic exergaming
(2009)
O'Huiginn, Brendan; Smyth, Barry; Coughlan, Garrett; Fitzgerald, Diarmaid; Caulfie...
Therapeutic exergaming
(2009)
O'Huiginn, Brendan; Smyth, Barry; Coughlan, Garrett; Fitzgerald, Diarmaid; Caulfield, Brian
Abstract:
Exercise therapy is prescribed by physiotherapists and rehabilitation practitioners as part of the treatment programme for many movement impairment disorders. Poor adherence and inadequate exercise technique often result in poor outcomes for these patients and delays their return to full physical function. Therapeutic exergaming, which is the use of computer games and body-worn motion tracking sensors to teach therapeutic exercise programmes to patients, may offer solutions to these problems. In this paper we describe one such system, known as FlyFit, which offers a sensor-driven flight game environment that allows physiotherapists to intuitively design game levels that will induce patients to correctly carry out their exercises programme. A four-week pilot study to investigate the training effect of the system compared to a conventional exercise training approach is described. Results suggest these exergaming systems may induce improvements in balance and strength similar to the co...
http://hdl.handle.net/10197/1298
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Inferring Queue State by Measuring Delay in a WiFi Network
(2009)
Malone, David; Leith, Douglas J. ; Dangerfield, Ian
Inferring Queue State by Measuring Delay in a WiFi Network
(2009)
Malone, David; Leith, Douglas J. ; Dangerfield, Ian
Abstract:
Packet round trip time is a quantity that is easy to measure for end hosts and applications. In many wired networks, the round trip has been exploited for purposes such as congestion control and bandwidth measurement because of relatively simple relationships between buffer occupancy and drain time. In 802.11 networks, the buffer drain times show considerable variability due to the random nature of the MAC service. We examine some of the problems faced when using round-trip-time-based queue estimates in these networks, particularly in relation to congestion control.
http://eprints.nuim.ie/1500/
Marked
Mark
Towards statistical client prediction - analysis of user behavious in distributed interactive media
(2004)
McCoy, Aaron; Delaney, Declan; McLoone, Seamus; Ward, Tomas
Towards statistical client prediction - analysis of user behavious in distributed interactive media
(2004)
McCoy, Aaron; Delaney, Declan; McLoone, Seamus; Ward, Tomas
Abstract:
Distributed interactive media such as networked multiplayer computer games offer users the opportunity to interact and share experiences within a virtual environment. More often than not, these interactions are required to be performed in real-time, a constraint which poses problems given the underlying network capabilities used to transmit information. In these real-time distributed systems, the amount of information that needs to be shared between participants in order to maintain complete game-state fidelity is too large. As a result, trade-offs must be made over what information requirements are necessary to maintain a level of consistency that will provide adequate quality of interaction for the users. One possible solution to this problem is the use of statistical modeling techniques that attempt to capture the individual behaviour of system users. These models can then be used to predict the likely future behaviour for the users, thus reducing the shared information requireme...
http://eprints.nuim.ie/291/
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An optical model of computation
(2005)
Woods, Damien; Naughton, Thomas J.
An optical model of computation
(2005)
Woods, Damien; Naughton, Thomas J.
Abstract:
We prove computability and complexity results for an original model of computation called the continuous space machine. Our model is inspired by the theory of Fourier optics. We prove our model can simulate analog recurrent neural networks, thus establishing a lower bound on its computational power. We also dene a (log2 n) unordered search algorithm with our model.
http://eprints.nuim.ie/571/
Marked
Mark
Spatio-temporal multi-granularity : modelling and implementation challenges
(2009)
Camossi, Elena; Bertolotto, Michela; Bertino, Elisa
Spatio-temporal multi-granularity : modelling and implementation challenges
(2009)
Camossi, Elena; Bertolotto, Michela; Bertino, Elisa
Abstract:
Multiple spatial and temporal granularities are essential to extract significant knowledge from datasets at different levels of detail: they enable to zoom-in and zoom-out a dataset, enhancing the data modelling flexibility and being instrumental to boost the analysis of information. Implementing granularities poses several interesting problems. Specifically, in this paper we analyse the issues involved by enhancing a data model and a query language with spatio-temporal multi-granularity, and we figure out efficacious solutions to address all of them. In our exposition, we investigate proper representations for the spatial and the temporal domains; then we conceive an appropriate design for granules and granularities, and for multi-granular values. In particular, mutual relationships among granularities and how they affect granularities design is discussed according to their influence on data access and considering the application of multi-granular conversions. Afterwards, we dedica...
http://hdl.handle.net/10197/1603
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Using the Crytek game engine in the Dublin Institute of Technology
(2005)
McAtamney, Hugh; O'Shea, Brendan; Mtenzi, Fredrick
Using the Crytek game engine in the Dublin Institute of Technology
(2005)
McAtamney, Hugh; O'Shea, Brendan; Mtenzi, Fredrick
Abstract:
<p>It is envisaged that within the next 10 years. the Dublin Institute of Technology (DIT), Ireland’s largest third level university, will move to a new campus in Grangegorman, located in the north inner city of Dublin This site is currently being used as a hospital. It has twelve listed buildings and is located in a densely populated urban community. This paper describes how the Crytek 3D Game engine is being used to create a game MOD (modification) of the current hospital site, how it will be used in the construction and public consultation process of the new campus and how students in the DIT are learning computer science in an new way.</p>
http://arrow.dit.ie/scschcomcon/34
Marked
Mark
Channel dependent interference and decentralized colouring
(2007)
Clifford, P.; Leith, D. J.
Channel dependent interference and decentralized colouring
(2007)
Clifford, P.; Leith, D. J.
Abstract:
We consider channel allocation to mitigate interference be- tween wireless LANs. The channel allocation task is often formulated in the literature as finding a proper colouring of a single graph. We show that the interference between WLANs can be channel dependent in which case a different conflict graph is associated with each channel. Channel allocation then corresponds to a multi-graph colouring problem. This potentially has profound implications as the behaviour of many proposed colouring-based algorithms for channel allocation is unclear in a multi-graph context. We prove that a recently proposed decentralized colouring algorithm performs correctly in the multi-graph setting. We also present a new, extended version of this algorithm suited to a wide range of multi-radio architectures.
http://eprints.nuim.ie/1710/
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An Application of Gaussian mixtures: colour segmenting for the four legged league using HSI colour space.
(2008)
Henderson, Naomi; King, Robert; Middleton, Richard H.
An Application of Gaussian mixtures: colour segmenting for the four legged league using HSI colour space.
(2008)
Henderson, Naomi; King, Robert; Middleton, Richard H.
Abstract:
In the colour coded environment of the RoboCup 4 Legged League it is crucial to extract as much colour information as possible from an image without error. To do this requires hours of manual YUV pixel mapping and testing to ensure robustness under all possible lighting conditions. The YUV colour space is a very convenient standard for transmission of video data, but for colour classification and segmentation it suffers from being non-intuitive and sensitive to changes in lighting. Alternatively, colour classification principles can be applied in an HSI colour space; one of the convenient characteristics of the HSI colour space is that the hue value, H, represents the colour wavelength information. From this concept it is easier to separate and label colour regions in an automated process as the theoretical hue and colour wavelength relationship is known. By fitting a Gaussian model using mixtures to HSI histograms we can generate boundaries of colour classes in HSI colour space.
http://eprints.nuim.ie/1712/
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Processing ontology alignments with SPARQL
(2008)
Polleres, Axel
Processing ontology alignments with SPARQL
(2008)
Polleres, Axel
Abstract:
Solving problems raised by heterogeneous ontologies can be achieved by matching the ontologies and processing the resulting alignments. This is typical of data mediation in which the data must be translated from one knowledge source to another . We propose to solve the data translation problem, i.e. the processing part, using the SPARQL query language. Indeed, such a language is particularly adequate for extracting data from one ontology and, through its CONSTRUCT statement, for generating new data. We present examples of such transformations, but we also present a set of example correspondences illustrating the needs for particular representation constructs, such as aggregates, value- generating built-in functions and paths, which are missing from SPARQL. Hence, we advocate the use of two SPARQL extensions providing these missing features.
http://hdl.handle.net/10379/535
Displaying Results 226 - 250 of 1663 on page 10 of 67
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1996 (15)
1995 (18)
1994 (13)
1993 (15)
1992 (12)
1991 (4)
1990 (1)
1989 (1)
1988 (1)
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