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Displaying Results 1 - 25 of 4476 on page 1 of 180
Marked
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'Letting go of control' to embrace open source : implications for company and community
(2010)
Shaikh, Maha; Cornford, Tony
'Letting go of control' to embrace open source : implications for company and community
(2010)
Shaikh, Maha; Cornford, Tony
Abstract:
It is increasingly understood across the information technology and services sector that engagement with the open source software model can serve as a means for firms to capture intellectual energy, learn about productive software processes, access relevant technical skills, identify and recruit staff, as well as obtain valuable resources including code. This paper reports a study undertaken within two large global IT companies that have been actively involved with open source for more than ten years. The study involved over 30 semi-structured interviews with employees of the companies drawn from top, middle, and lower level management, and included active and experienced developer as well as open source community members. Our findings indicate how these companies have adapted their day-to-day management practices to take into account the need for flexibility and freedom expected by open source communities. This paper focuses on how they ‘let go of control’ and what the implication...
http://hdl.handle.net/10344/713
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'Loosely-coupled' consistency between agent-oriented conceptual models and Z specifications
(2005)
Krishna, Aneesh; Ghose, Aditya K.; Vilkomir, Sergiy A.
'Loosely-coupled' consistency between agent-oriented conceptual models and Z specifications
(2005)
Krishna, Aneesh; Ghose, Aditya K.; Vilkomir, Sergiy A.
Abstract:
Agent-oriented conceptual modelling (AOCM) is a relatively new technique that offers significant benefits in the modelling and development of complex computer systems. It is highly effective in answering questions such that what are the main goals of the system, how key actors depend on each other, and what alternatives exist. A formal method can benefit any stage of the software development lifecycle and improves the quality of the computer systems. The paper defines an approach that allows to complement requirements modelling notations with formal specifications, while preserving the consistency between them.
http://hdl.handle.net/10344/155
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‘Can biomimetic principles coupled with advanced fabrication technologies and stimuli-responsive materials drive revolutionary advances in wearable and implantable biochemical sensors?’
(2016)
Diamond, Dermot; Florea, Larisa; Dunne, Aishling; Tudor, Alexandru; Ben Azouz, Aymen; C...
‘Can biomimetic principles coupled with advanced fabrication technologies and stimuli-responsive materials drive revolutionary advances in wearable and implantable biochemical sensors?’
(2016)
Diamond, Dermot; Florea, Larisa; Dunne, Aishling; Tudor, Alexandru; Ben Azouz, Aymen; Coleman, Simon
Abstract:
Since the initial breakthroughs in the 1960’s and 70’s that led to the development of the glucose biosensor, the oxygen electrode, ion-selective electrodes, and electrochemical/optochemical diagnostic devices, the vision of very reliable, affordable chemical sensors and bio-sensors capable of functioning autonomously for long periods of time (years), and providing access to continuous streams of real-time data remains unrealized. This is despite massive investment in research and the publication of many thousands of papers in the literature. It is over 40 years since the first papers proposing the concept of the artificial pancreas, by combining the glucose electrode with an insulin pump. Yet even now, there is no chemical sensor/biosensor that can function reliably inside the body for more than a few days, and such is the gap in what can be delivered (days), and what is required (minimum 10 years) for implantable devices, it is not surprising that in health diagnostics, the overw...
http://doras.dcu.ie/21064/
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‘Materials science and the sensors revolution’ re-Inventing chemical sensing for widely distributed environmental sensing
(2013)
Diamond, Dermot
‘Materials science and the sensors revolution’ re-Inventing chemical sensing for widely distributed environmental sensing
(2013)
Diamond, Dermot
http://doras.dcu.ie/17991/
Marked
Mark
‘SWEATCH’ – A platform for real-time monitoring of sweat electrolyte composition
(2016)
Glennon, Tom; O'Quigley, Conor; McCaul, Margaret; Coyle, Shirley; Matzeu, Giusy; C...
‘SWEATCH’ – A platform for real-time monitoring of sweat electrolyte composition
(2016)
Glennon, Tom; O'Quigley, Conor; McCaul, Margaret; Coyle, Shirley; Matzeu, Giusy; Coleman, Simon; Ben Azouz, Aymen; Beirne, Stephen; Wallace, Gordon; White, Paddy; O'Mahoney, Niamh; Diamond, Dermot
Abstract:
Since the initial breakthroughs in the 1960’s and 70’s that led to the development of the glucose biosensor, the oxygen electrode, ion-selective electrodes, and electrochemical/optochemical diagnostic devices, the vision of very reliable, affordable chemical sensors and bio-sensors capable of functioning autonomously for long periods of time (years), and providing access to continuous streams of real-time data remains unrealized. This is despite massive investment in research and the publication of many thousands of papers in the literature. It is over 40 years since the first papers proposing the concept of the artificial pancreas, by combining the glucose electrode with an insulin pump. Yet even now, there is no chemical sensor/biosensor that can function reliably inside the body for more than a few days, and such is the gap in what can be delivered (days), and what is required (minimum 10 years) for implantable devices, it is not surprising that in health diagnostics, the overw...
http://doras.dcu.ie/21115/
Marked
Mark
‘Water, water, every where, Nor any drop to drink’
(2014)
Diamond, Dermot
‘Water, water, every where, Nor any drop to drink’
(2014)
Diamond, Dermot
Abstract:
Despite decades of research and huge investment, remote monitoring of the state of fresh and sea-water using all but the simplest sensors remains prohibitively expensive. As water metering and charges are increasingly implemented across Europe, can the ordinary person expect to obtain devices that can enable them to independently check the quality of their drinking water? Will citizens be able to share this data, and access other data related to their environment, like air quality? The signs are that they will, but the path forward is not straightforward. In this lecture I will discuss the current status of autonomous sensors for environmental monitoring, and speculate on the key breakthroughs that could drive a sensor 'revolution', which has the potential to place a vast amount of environmental information in the public domain.
http://doras.dcu.ie/19930/
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"Leagile” software development: an experience report analysis of the application of lean approaches in agile software development
(2012)
Wang, Xiaofeng; Conboy, Kieran; Cawley, Oisín
"Leagile” software development: an experience report analysis of the application of lean approaches in agile software development
(2012)
Wang, Xiaofeng; Conboy, Kieran; Cawley, Oisín
Abstract:
In recent years there has been a noticeable shift in attention from those who use agile software development toward lean software development, often labelled as a shift “from agile to lean”. However, the reality may not be as simple or linear as this label implies. To provide a better understanding of lean software development approaches and how they are applied in agile software development, we have examined 30 experience reports published in past agile software conferences in which experiences of applying lean approaches in agile software development were reported. The analysis identified six types of lean application. The results of our study show that lean can be applied in agile processes in different manners for different purposes. Lean concepts, principles and practices are most often used for continuous agile process improvement, with the most recent introduction being the kanban approach, introducing a continuous, flow-based substitute to time-boxed agile processes.
http://hdl.handle.net/10344/2677
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"Privacy-shake", a haptic interface for managing privacy settings in mobile location sharing applications
(2010)
Jedrzejczyk, Lukasz; Price, Blaine A.; Bandara, Arosha K.; Nuseibeh, Bashar
"Privacy-shake", a haptic interface for managing privacy settings in mobile location sharing applications
(2010)
Jedrzejczyk, Lukasz; Price, Blaine A.; Bandara, Arosha K.; Nuseibeh, Bashar
Abstract:
We describe the “Privacy-Shake”, a novel interface for managing coarse grained privacy settings. We built a prototype that enables users of Buddy Tracker, an example location sharing application, to change their privacy preferences by shaking their phone. Users can enable or disable location sharing and change the level of granularity of disclosed location by shaking and sweeping their phone. In this poster we present and motivate our work on Privacy-Shake and report on a lab-based evaluation of the interface with 16 participants.
http://hdl.handle.net/10344/763
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“Calixarenes as ionophores in ion- selective electrodes: The Past and The Future of Chemical Sensing”
(2014)
Diamond, Dermot
“Calixarenes as ionophores in ion- selective electrodes: The Past and The Future of Chemical Sensing”
(2014)
Diamond, Dermot
Abstract:
This paper focuses on the context of early research into the use of calixarenes as ionophores in ion-selective electrodes and explains the basis for their exquisite selectivity in terms of the 3D arrangement of polar binding sites [1]. However, in order to make chemical sensors with long effective lifetimes, this polar cavity must be associated with an overall non-polar molecular character, in order to ensure that that the binding sites do not leach rapidly into aqueous sample media. Furthermore, while selectivity demands a significant binding constant (at least for the primary target ion), this cannot be too large, or binding becomes irreversible, leading to device failure. I will also review the trend towards solid-state sensor configurations compatible with printing technologies and low-cost mass production. To achieve this goal, the electrode internal-filling solution must be replaced with a solid material capable of emulating the mixed conductance behaviour that (in convent...
http://doras.dcu.ie/20249/
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“Lots done, more to do”: the current state of agile systems development research
(2009)
Abrahamsson, Pekka; Conboy, Kieran; Wang, Xiaofeng
“Lots done, more to do”: the current state of agile systems development research
(2009)
Abrahamsson, Pekka; Conboy, Kieran; Wang, Xiaofeng
Abstract:
Agile systems development methods emerged as a response to the inability of previous plandriven approaches to handle rapidly changing environments (Highsmith 2002). Originating from so-called “light-weight” methods and promoted through the publication of the Agile Manifesto (2001), the agile method family have become highly prevalent in recent years. Meantime, agile system development research has gained momentum, as is evident from the increasing number of dedicated journal special issues, conferences, conference tracks and workshops. However, practitioners and consultants have largely driven the creation and dissemination of these methods. Agile research has lagged behind practice, as is often the case with new and emerging phenomena in Information Systems Development (ISD)
http://hdl.handle.net/10344/2293
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“My Sweat my Health”: Real time sweat analysis with wearable micro-fluidic devices
(2011)
Benito-Lopez, Fernando; Curto, Vincenzo F.; Coyle, Shirley; Byrne, Robert; Diamond, Dermot
“My Sweat my Health”: Real time sweat analysis with wearable micro-fluidic devices
(2011)
Benito-Lopez, Fernando; Curto, Vincenzo F.; Coyle, Shirley; Byrne, Robert; Diamond, Dermot
http://doras.dcu.ie/16268/
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(Solid plus liquid) solubility of organic compounds in organic solvents - correlation and extrapolation
(2014)
Svärd, Michael; Rasmuson, Åke C
(Solid plus liquid) solubility of organic compounds in organic solvents - correlation and extrapolation
(2014)
Svärd, Michael; Rasmuson, Åke C
Abstract:
A semi-empirical model is developed for the regression of (solid + liquid) solubility data with temperature. The model fulfils the required boundary conditions, allowing for robust extrapolation to higher and lower temperatures. The model combines a representation of the solid-state activity which accommodates a temperature-dependent heat capacity difference contribution with a scaled three-parameter Weibull function representing the temperature dependence of the solution activity coefficient at equilibrium. Evaluation of the model is based on previously published experimental calorimetric and solubility data of four organic compounds, fenoxycarb, fenofibrate, risperidone and butyl paraben, in five common organic solvents, methanol, ethyl acetate, acetone, acetonitrile, and toluene. The temperature dependence of the van't Hoff enthalpy of solution and its components is analysed and discussed. Among the four compounds the influence of temperature on the enthalpy of fusion varies...
http://hdl.handle.net/10344/5289
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(Web Search) shared : social aspects of a collaborative, community-based search network
(2008)
Coyle, Maurice; Smyth, Barry
(Web Search) shared : social aspects of a collaborative, community-based search network
(2008)
Coyle, Maurice; Smyth, Barry
Abstract:
Collaborative Web search (CWS) is a community-based approach to Web search that supports the sharing of past result selections among a group of related searchers so as to personalize result-lists to reflect the preferences of the community as a whole. In this paper, we present the results of a recent live-user trial which demonstrates how CWS elicits high levels of participation and how the search activities of a community of related users form a type of social search network.
http://hdl.handle.net/10197/1135
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[Ru-POM] Photo-electrocatalysis
(2011)
Zhu, Jie
[Ru-POM] Photo-electrocatalysis
(2011)
Zhu, Jie
Abstract:
In the past years, photo-sensitation of polyoxometalate anions with Ruthenium polypyridyl cations has received intensive investigation as the excellent photoluminescence properties and stability of Ruthenium polypyridyl complexes in multiple redox states can be coupled to the POM in order to extend the absorbance crosssection of the resulting complex into the visible region. In this thesis, remediation of organic solvent, such as benzyl alcohol and toluene, and a number of key processes that influence the overall output from photocatalytic thin films were optimized. These steps included; (1) the extent to which the catalyst and sensitizer interact electronically, (2) the film structure since this can influence the substrate access to the catalytic centres and (3) their rate of regeneration. Thin layers of an electrostatically associated adduct formed between the polyoxomolybdate, and the ruthenium polypyridyl complex or metallopolymers have been deposited onto electrodes using alter...
http://doras.dcu.ie/16607/
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1/f noise in MgO double-barrier magnetic tunnel junctions
(2011)
COEY, JOHN MICHAEL DAVID
1/f noise in MgO double-barrier magnetic tunnel junctions
(2011)
COEY, JOHN MICHAEL DAVID
Abstract:
Low frequency noise has been investigated in MgO double-barrier magnetic tunnel junctions (DMTJs) with tunneling magnetoresistance (TMR) ratios up to 250% at room temperature. The noise shows a 1/f frequency spectrum and the minimum of the noise magnitude parameter is 1.2 x 10(-10) mu m(2) in the parallel state for DMTJs annealed at 375 degrees C. The bias dependence of noise and TMR suggests that DMTJs with MgO barriers can be useful for magnetic field sensor applications.
http://hdl.handle.net/2262/54964
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12 (not so) easy pieces: grand challenges for open source software
(2006)
Feller, Joseph; Finnegan, Patrick; Lundell, Bjorn; Ostling, Mats; Agerfalk, Par J.; Dev...
12 (not so) easy pieces: grand challenges for open source software
(2006)
Feller, Joseph; Finnegan, Patrick; Lundell, Bjorn; Ostling, Mats; Agerfalk, Par J.; Deverell, Andrea
http://hdl.handle.net/10344/1857
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Dynamic Contextual Usage Metadata for Learning Resource Reuse in Adaptive Environments
(2011)
WADE, VINCENT PATRICK; WALSH, EDDIE; CONLAN, OWEN; RAFTER, RACHAEL
Dynamic Contextual Usage Metadata for Learning Resource Reuse in Adaptive Environments
(2011)
WADE, VINCENT PATRICK; WALSH, EDDIE; CONLAN, OWEN; RAFTER, RACHAEL
Abstract:
Drawing on the experiences and context of others who have already used a particular resource can greatly facili- tate that resource?s reuse. Such reuse is essential when the resources in question are digital learning assets, services and models which are expensive both in terms of time and monetary expenditure to develop and use. When these re- sources are deployed in personalised settings, where each user may be delivered a tailored sequence of resources that uniquely suits their particular needs, gathering and feder- ating a rich view of how these resources are being used be- comes important. In this article we describe an approach to facilitating the federating of contextual usage data, which is compiled over the lifecycle of a resource. Given that this data is likely to come from a range of different sources, our approach will need to be able to cope with the high level of heterogeneity expected in terms of its structure, syntax and semantics. We describe how such data may be us...
http://hdl.handle.net/2262/65743
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Extending a Knowledge-based Network to support Temporal Event Reasoning
(2010)
O'SULLIVAN, DECLAN; KEENEY, JOHN
Extending a Knowledge-based Network to support Temporal Event Reasoning
(2010)
O'SULLIVAN, DECLAN; KEENEY, JOHN
Abstract:
While the polling or request/response paradigm adopted by many network and systems management approaches form the backbone of modern monitoring and management systems, the most important and interesting events, faults, alerts and log messages arrive at the management agent in a push-based asynchronous manner. However, in the management infrastructure itself, at the point where events are initially processed and matched to subscribers, there have been few attempts to identify relationships or dependencies between events. This means that most of this burden is placed on the management application, or indeed the managers themselves. This research investigates enhancing the expressiveness of a knowledge-based networking middleware with the addition of three temporal operators to be used in subscriptions to select matching events. A prototype design is presented and a number of implementations are compared. The approach is also motivated using two scenarios for temporal correlation of wa...
http://hdl.handle.net/2262/49401
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1550 nm superluminescent diode and anti-stokes effect CCD camera based optical coherence tomography for full-field optical metrology
(2015)
Kredzinski, Lukasz
1550 nm superluminescent diode and anti-stokes effect CCD camera based optical coherence tomography for full-field optical metrology
(2015)
Kredzinski, Lukasz
Abstract:
Optical Coherence Tomography (OCT) is a well-established non-invasive imaging technology capable of carrying out 3D high-resolution cross-sectional images of the internal microstructure of examined material. However, almost all of these systems are expensive, requiring the use of complex optical setups, expensive light sources and complicated scanning of the sample under test. In addition, most of these systems have not taken advantage of the competitively priced optical components available at wavelength within the main optical communications band located in the 1550 nm region. A comparatively simple and inexpensive full-field OCT system (FFOCT), based on a Superluminescent Diode (SLD) with an Erbium-Doped Fiber Amplifier (EDFA) light source and anti-stokes imaging device was constructed, to perform 3D cross-sectional imaging. This kind of inexpensive setup with moderate resolution could be applicable in low-level biomedical and industrial diagnostics. This work involves assembly, ...
http://hdl.handle.net/10344/4834
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16S rRNA gene sequencing of mock microbial populations- impact of DNA extraction method, primer choice and sequencing platform
(2016)
Fouhy, Fiona; Clooney, Adam G; Stanton, Catherine; Claesson, Marcus J; Cotter, Paul D
16S rRNA gene sequencing of mock microbial populations- impact of DNA extraction method, primer choice and sequencing platform
(2016)
Fouhy, Fiona; Clooney, Adam G; Stanton, Catherine; Claesson, Marcus J; Cotter, Paul D
Abstract:
This publication has emanated from research supported in part by a research grant from Science Foundation Ireland (SFI) under Grant Numbers SFI/12/RC/2273 and 11/PI/1137 and by FP7 funded CFMATTERS (Cystic Fibrosis Microbiome-determined Antibiotic Therapy Trial in Exacerbations: Results Stratified, Grant Agreement no. 603038).
Background Next-generation sequencing platforms have revolutionised our ability to investigate the microbiota composition of complex environments, frequently through 16S rRNA gene sequencing of the bacterial component of the community. Numerous factors, including DNA extraction method, primer sequences and sequencing platform employed, can affect the accuracy of the results achieved. The aim of this study was to determine the impact of these three factors on 16S rRNA gene sequencing results, using mock communities and mock community DNA. Results The use of different primer sequen...
http://hdl.handle.net/11019/1018
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16S rRNA gene sequencing of mock microbial populations-impact of DNA extraction method, primer choice and sequencing platform
(2016)
Fouhy, Fiona; Clooney, Adam G.; Stanton, Catherine; Claesson, Marcus J.; Cotter, Paul D.
16S rRNA gene sequencing of mock microbial populations-impact of DNA extraction method, primer choice and sequencing platform
(2016)
Fouhy, Fiona; Clooney, Adam G.; Stanton, Catherine; Claesson, Marcus J.; Cotter, Paul D.
Abstract:
Background: Next-generation sequencing platforms have revolutionised our ability to investigate the microbiota composition of complex environments, frequently through 16S rRNA gene sequencing of the bacterial component of the community. Numerous factors, including DNA extraction method, primer sequences and sequencing platform employed, can affect the accuracy of the results achieved. The aim of this study was to determine the impact of these three factors on 16S rRNA gene sequencing results, using mock communities and mock community DNA. Results: The use of different primer sequences (V4-V5, V1-V2 and V1-V2 degenerate primers) resulted in differences in the genera and species detected. The V4-V5 primers gave the most comparable results across platforms. The three Ion PGM primer sets detected more of the 20 mock community species than the equivalent MiSeq primer sets. Data generated from DNA extracted using the 2 extraction methods were very similar. Conclusions: Microbiota composit...
http://hdl.handle.net/10468/4126
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Managing Policies for Dynamic Spectrum Access
(2006)
FORDE, TIMOTHY KIRBY; KEENEY, JOHN; LEWIS, DAVID; O'SULLIVAN, DECLAN; DOYLE, LINDA...
Managing Policies for Dynamic Spectrum Access
(2006)
FORDE, TIMOTHY KIRBY; KEENEY, JOHN; LEWIS, DAVID; O'SULLIVAN, DECLAN; DOYLE, LINDA; FEENEY, KEVIN
Abstract:
The advent of software radio technology and the resulting potential for dynamic access to the radio spectrum presents major new challenges in managing that access. These challenges arise from the likely spread of spectrum access decision-making authority well beyond existing regulatory authorities to a wide variety of co-existing market-based or open-access schemes. Policy-based management mechanisms are proposed as a flexible means for defining the rules that determine spectrum allocation dynamically. However, many existing policy based mechanisms rely on a fixed organisation structure and so are insufficiently flexible to support combinations of central allocation, market mechanisms and commons usage. In this paper we present the application of a novel policy-based management mechanism based on self-managing communities to the management of policy authoring authority. We show how an existing implementation could be used to manage a software-based radio system and how this approach...
http://hdl.handle.net/2262/30926
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Towards Multilingual User Models for Personalized Multilingual Information Retrieval
(2011)
GHORAB, MOHAMMED RAMI ELHUSSEIN; ZHOU, DONG; STEICHEN, BEN; WADE, VINCENT PATRICK
Towards Multilingual User Models for Personalized Multilingual Information Retrieval
(2011)
GHORAB, MOHAMMED RAMI ELHUSSEIN; ZHOU, DONG; STEICHEN, BEN; WADE, VINCENT PATRICK
Abstract:
The majority of studies in Personalized Information Retrieval (PIR) literature have focused on monolingual IR, and only relatively little work has been done concerning multilingual IR. In this paper we propose a novel method to represent user models in a multilingual fashion. We argue that such representation would be more suitable for Personalized Multilingual Information Retrieval (PMIR). Furthermore, we outline two algorithms for query adaptation based on user information from the multilingual user model.
http://hdl.handle.net/2262/63759
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A Semantic Model for Integrated Content Management, Localisation and Language Technology Processing
(2011)
LEWIS, DAVID; O'CONNOR, ALEXANDER; JONES, DOMINIC HUGH
A Semantic Model for Integrated Content Management, Localisation and Language Technology Processing
(2011)
LEWIS, DAVID; O'CONNOR, ALEXANDER; JONES, DOMINIC HUGH
Abstract:
Providers of products and services are faced with the dual challenge of supporting the languages and individual needs of the global customer while also accommodating the increasing relevance of user-generated content. As a result, the content and localisation industries must now evolve rapidly from manually processing predicable content which arrives in large jobs to the highly automated processing of streams of fast moving, heterogeneous and unpredictable content. This requires a new generation of digital content management technologies that combine the agile flow of content from developers to localisers and consumers with the data-driven language technologies needed to handle the volume of content required to feed the demands of global markets. Data-driven technologies such as statistical machine translation, cross-lingual information retrieval, sentiment analysis and automatic speech recognition, all rely on high quality training content, which in turn must be continuall...
http://hdl.handle.net/2262/59468
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3 Dimensional analysis of holographic photopolymers based memories
(2005)
Gallego, Sergi; Ortuño, M.; Neipp, Cristian; Márquez, A.; Beléndez, A.; Pascual, I.; Ke...
3 Dimensional analysis of holographic photopolymers based memories
(2005)
Gallego, Sergi; Ortuño, M.; Neipp, Cristian; Márquez, A.; Beléndez, A.; Pascual, I.; Kelly, John V.; Sheridan, John T.
Abstract:
One of the most interesting applications of photopolymers is as holographic recording materials for holographic memories. One of the basic requirements for this application is that the recording material thickness must be 500 µm or thicker. In recent years many 2-dimensional models have been proposed for the analysis of photopolymers. Good agreement between theoretical simulations and experimental results has been obtained for layers thinner than 200 µm. The attenuation of the light inside the material by Beer’s law results in an attenuation of the index profile inside the material and in some cases the effective optical thickness of the material is lower than the physical thickness. This is an important and fundamental limitation in achieving high capacity holographic memories using photopolymers and cannot be analyzed using 2-D diffusion models. In this paper a model is proposed to describe the behavior of the photopolymers in 3-D. This model is applied to simulate the formation ...
http://hdl.handle.net/10197/3343
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