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Displaying Results 126 - 150 of 10754 on page 6 of 431
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Distributed reinforcement learning of autonomic behaviour.
(2004)
CAHILL, VINNY
Distributed reinforcement learning of autonomic behaviour.
(2004)
CAHILL, VINNY
Abstract:
This paper introduces Collaborative Reinforcement Learning (CRL), a coordination model for solving system-wide optimisation problems in distributed systems where there is no support for global state. In CRL the autonomic properties of a distributed system emerge from the coordination of individual agents solving discrete optimisation problems using Reinforcement Learning. In the context of an ad hoc routing protocol, we show how system-wide optimisation in CRL can be used to establish and maintain autonomic properties for decentralised distributed systems.
http://hdl.handle.net/2262/32808
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Semantically holistic and personalized views across heterogeneous information sources
(2007)
HAMPSON, CORMAC; CONLAN, OWEN
Semantically holistic and personalized views across heterogeneous information sources
(2007)
HAMPSON, CORMAC; CONLAN, OWEN
Abstract:
A consolidated view of the content within different data repositories would facilitate useful operations such as advanced informational discovery. This paper proposes a methodology and an architecture that uses semantic annotations to enable such holistic views across domain specific information sources. The potential for the personalization of this annotated information is described, and the future work necessary to implement the system is elaborated on.
http://hdl.handle.net/2262/22581
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A Comparison of Channel Assignment Techniques with Power Control in Ad Hoc Networks
(2009)
DA SILVA, LUIZ
A Comparison of Channel Assignment Techniques with Power Control in Ad Hoc Networks
(2009)
DA SILVA, LUIZ
Abstract:
Multi-channel operation in an ad hoc network can improve robustness and reliability by ef?ciently managing interference and reducing contention. In this paper, we model four dynamic channel assignment techniques under the same set of assumptions, comparing the ef?ciency of their power and channel allocations. As the number of channels increases, the differences in the performance of the four techniques become more pronounced. Among the techniques studied, the con?ict graph-based technique achieves the highest number of feasible links and the lowest average power consumption.
http://hdl.handle.net/2262/52990
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Channel adjustment to extreme floods in arid central Australia.
(1998)
BOURKE, MARY
Channel adjustment to extreme floods in arid central Australia.
(1998)
BOURKE, MARY
http://hdl.handle.net/2262/66640
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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 PLY: exploring the limits and possibilities for transformative workplace learning in Irish schools
(2014)
Kamp, Annelies; Black, Dorothy
3 PLY: exploring the limits and possibilities for transformative workplace learning in Irish schools
(2014)
Kamp, Annelies; Black, Dorothy
Abstract:
In this paper we report on preliminary research conducted in the Republic of Ireland and Northern Ireland by researchers at Dublin City University and the University of Ulster. The research considered the limits and possibilities for meaningful workplace learning for young people to support their transition to sustainable employment in the post-Global Financial Crisis context. In the research, we adopted the term ‘workplace learning’ as opposed to the term ‘workbased learning’ as it underscores our interest in learning that happens in a real workplace rather than learning that might happen in schools while targeted at future work endeavours. Our specific focus was on the forms of workplace learning that are organized within the context of the senior school curriculum and their role in enhancing youth transition and a consideration of what concepts from Actor Network Theory (Latour 2007) might offer in analysing the data. Funded by the Irish Standing Conference on Teacher Education...
http://doras.dcu.ie/20270/
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300 years of copyright: have we gone full circle? On the use of technology to address limitations in distributing public performance broadcast royalties.
(2009)
Healy, Ron; Timoney, Joseph
300 years of copyright: have we gone full circle? On the use of technology to address limitations in distributing public performance broadcast royalties.
(2009)
Healy, Ron; Timoney, Joseph
Abstract:
This paper briefly examines the concept and rationale of Copyright at the time of its inception and considers whether current legislation and, more distinctly, the administration of some of the rights specified by Copyright legislation has created a situation whereby authors of works in the music industry are being adversely affected and even exploited by such schemes thereby completing the circle by returning many authors to the point which made Copyright legislation necessary. This paper also outlines the design and implementation of a completely automatic, open and transparent blind-detection digital audio watermarking system that will enable automatic monitoring and reporting of public performance of both digital and analogue radio and television transmissions using modern computer technology in order to generate accurate royalty distributions to ‘authors’ in order to administer their rights more equitably.
http://eprints.maynoothuniversity.ie/1636/
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Development of a Humanoid Robot for Education and Outreach
(2013)
KELLY, KEVIN; MCGINN, CONOR
Development of a Humanoid Robot for Education and Outreach
(2013)
KELLY, KEVIN; MCGINN, CONOR
Abstract:
Robots have engendered a certain public fascination since the term was first coined by Josef ?apek in the 1920s [1]. In particular humanoid robots have the capacity to excite (and in some cases intimidate) the general public about the future developments in the field. Several researchers have harnessed this interest in outreach and education activities. This paper presents the design of a novel modular humanoid robot for education and outreach. The robot uses a chain drive system actuated by servomotors to achieve locomotion, while the location of the centre of gravity of the robot is altered by using a sophisticated weight distribution system in the ?torso?. The robot has six active degrees of freedom in its legs and one in its torso. A review of humanoid robots used in education and outreach is presented before an exposition of the design, realization and testing of the robot. Future publications will report on the evaluation of the effectiveness of the robot in outreach activities.
http://hdl.handle.net/2262/74301
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An investigation into Bridgman furnace solidification of titanium alloys
(2013)
MOONEY, ROBIN; MCFADDEN, SHAUN
An investigation into Bridgman furnace solidification of titanium alloys
(2013)
MOONEY, ROBIN; MCFADDEN, SHAUN
http://hdl.handle.net/2262/75677
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Babysibs: Dyadic prosody
(2016)
QUIGLEY, JEAN
Babysibs: Dyadic prosody
(2016)
QUIGLEY, JEAN
http://hdl.handle.net/2262/77450
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Spectroscopy of doubly and triply-charmed baryons from lattice QCD
(2013)
PEARDON, MICHAEL
Spectroscopy of doubly and triply-charmed baryons from lattice QCD
(2013)
PEARDON, MICHAEL
http://hdl.handle.net/2262/72889
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NEXT GENERATION TACTILE SENSING FOR HUMAN-ROBOT INTERACTION IN INDUSTRIAL ROBOTICS
(2015)
KELLY, KEVIN
NEXT GENERATION TACTILE SENSING FOR HUMAN-ROBOT INTERACTION IN INDUSTRIAL ROBOTICS
(2015)
KELLY, KEVIN
Abstract:
Tactile sensing is commonly viewed as one of the basic forms of sensing [24] ? intelligent life is rarely found without some capacity for tactile sensing ? and it is a fundamental sense in human perception [24, 29]; however it is a sensing modality which few robots currently benefit from. With robotics gradually becoming more dextrous and intelligent, their application areas are expanding from restricted safety enclosures, to being on the production floor next to human co-workers and leading toward increasingly flexible manufacturing, as is already being seen with the recent rise of collaborative robotics in industry. This paper aims to explore how extrinsic tactile sensing can assist in this progress by being a facilitating technology for developing complex Human-Robot Interaction, and the key engineering challenges behind implementing advanced extrinsic tactile sensing.
http://hdl.handle.net/2262/74608
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HUMAN IN THE LOOP CONTROL IN ROBOTICS FOR MANUFACTURING
(2015)
KELLY, KEVIN; MCGINN, CONOR
HUMAN IN THE LOOP CONTROL IN ROBOTICS FOR MANUFACTURING
(2015)
KELLY, KEVIN; MCGINN, CONOR
Abstract:
Traditional manufacturing processes are limited to either being fully automated (CNC machining, robotic packaging, robotic welding systems, etc.), or fully manual (assembly tasks, hand tool operation, etc.), with the automated processes being separated via safety barriers in work cells from the manual processes; however current collaborative robot systems are greying the divide in how human workers and machinery are separated in factories, by offering lower- risk force compliant systems which can reduce or eliminate the requirement for bulky and restrictive guarding. This progress toward guard-less machinery which can operate directly next to human workers opens up not only new ways in which technology can assist human workers; but also how human workers can assist robots. Although collaborative robotics opens up new environments to operate in, many issues will remain which prevent the use of robots for new tasks, instead of human workers, due to a human?s cognitive capabilities. Hu...
http://hdl.handle.net/2262/74607
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ORIENTATION ESTIMATION USING KALMAN FILTERS WITH MULTIPLE SENSORS
(2015)
KELLY, KEVIN; MCGINN, CONOR
ORIENTATION ESTIMATION USING KALMAN FILTERS WITH MULTIPLE SENSORS
(2015)
KELLY, KEVIN; MCGINN, CONOR
Abstract:
The ability to repeatedly and accurately position robotic end-effectors is a key requirement for modern industrial automation. Parallel developments in domestic and service robotics are opening up exciting possibilities for future manufacturing scenarios that would see robots and humans work far more closely together. These robots will typically be lighter, more mobile, less task specific and far more interactive than typical manufacturing robots of today. Reliable and precise detection of position and orientation in conjunction with the ability to plan and control complex kinematic motions will be vital. Currently, a large variety of sensors exist to measure orientation. The reliability and other attributes of these sensor technologies vary greatly. By using multiple sensors more accurate orientation estimates can be achieved. This paper presents the use of Kalman filters to realise sensor fusion of accelerometer, gyroscope and incremental encoder data. Four Kalman filters are impl...
http://hdl.handle.net/2262/74610
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EFFECTIVE STRATEGIES FOR GROUP WORK IN ENGINEERING CURRICULA
(2015)
KELLY, KEVIN
EFFECTIVE STRATEGIES FOR GROUP WORK IN ENGINEERING CURRICULA
(2015)
KELLY, KEVIN
Abstract:
Modern engineers are expected to be able to work effectively in teams and accreditation criteria (e.g. Engineers Ireland [1], ABET - Accreditation Bureau for Engineering and Technology [2]) typically make explicit reference to these competencies at both an individual and programme level. However, assessment at university has traditionally been performed at the individual level, and many difficulties are regularly noted by engineering educators when trying to manage group projects. These difficulties include equity of marking, balance between individually and collectively assessed components, provision of appropriate levels of guidance and intervention in managing group dynamics, and over- discretization of marking leading to selective targeting by students at the expense of higher order module level learning outcomes. This work reports on two group-design, project-based modules taught in the author?s institution, and a number of specific strategies that have been put in place to add...
http://hdl.handle.net/2262/74609
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Computer Modelling of Manufacturing Processes: The Development of a 2D Axisymmetric Model of the Bridgman Casting Process
(2015)
MCFADDEN, SHAUN; MOONEY, ROBIN; ROBINSON, ANTHONY
Computer Modelling of Manufacturing Processes: The Development of a 2D Axisymmetric Model of the Bridgman Casting Process
(2015)
MCFADDEN, SHAUN; MOONEY, ROBIN; ROBINSON, ANTHONY
http://hdl.handle.net/2262/75782
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Improving Query and Result List Adaptation in Personalized Multilingual Information Retrieval
(2011)
GHORAB, MOHAMMED RAMI ELHUSSEIN
Improving Query and Result List Adaptation in Personalized Multilingual Information Retrieval
(2011)
GHORAB, MOHAMMED RAMI ELHUSSEIN
Abstract:
This research study aims to improve personalization in MIR systems, by improving the relevance of multilingual search results with respect to the user and not just the query. The study investigates how to model different aspects of a multilingual search user. Information about users can be demographic information, such as language and country, or information about the user?s search interests. This information can be gathered explicitly by asking the user to supply the required information or implicitly by inferring the information from the user?s search history. The study will then investigate how to exploit the modeled user information to personalize the user?s multilingual search by performing query and result list adaptation. The main research questions that are addressed in this study are: how to improve the relevance of search results with respect to individual users in PMIR and how to construct profiles that represent aspects and interests of a multilingual search user.
http://hdl.handle.net/2262/63758
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350 mV, 0.5 mW, 5 GHz, 130 nm CMOS Class-C VCO Design Using Open Loop Analysis
(2012)
Szczepkowski, Grzegorz ; Farrell, Ronan
350 mV, 0.5 mW, 5 GHz, 130 nm CMOS Class-C VCO Design Using Open Loop Analysis
(2012)
Szczepkowski, Grzegorz ; Farrell, Ronan
Abstract:
This paper presents a design method of LC cross-coupled oscillators using a large signal S-parameter open loop approach instead of typical negative resistance methodology presented in the liter- ature. The open loop technique allows extraction of loaded quality factor of the complete oscillator circuit and observe how oscillation conditions change with increasing oscillator signal amplitude. As a result, highly non-linear modes of oscillator operation (class-C in this case), can be analysed without necessity of conducting time consuming transient simulations. The presented method is not technology specific and allows fast calculations under changing bias conditions. The simulated class-C 130 nm CMOS oscillator operates at 5 GHz from a reduced power supply of 350 mV, achieving average SSB phase noise better than -115 dBc/Hz at 1 MHz offset from the carrier, using a relatively low loaded quality factor (QL ≈ 10) LC resonator. The presented VCO has tuning range of 280 MHz to compensate...
http://eprints.maynoothuniversity.ie/3954/
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Chemical microscopy and nanoscopy of bio-materials and living cells, IRMMW-THz
(2010)
KOPF, ILONA
Chemical microscopy and nanoscopy of bio-materials and living cells, IRMMW-THz
(2010)
KOPF, ILONA
Abstract:
Raman microspectroscopy of human sperm cells and nearfield infrared microscopy of nanoscale biomaterials like nanografted DNA have been performed. A newly developed station for the ANKA-IR2 beamline combines several techniques to study the same sample at the same position.
http://hdl.handle.net/2262/56559
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380 MHz Low-Power Sharp-Rejection Active-RC LPF for IEEE 802.15.4a UWB WPAN
(2009)
Tuan-Phan, Anh; Farrell, Ronan ; Gug-Lee, Sang; Lee, Jeongseon
380 MHz Low-Power Sharp-Rejection Active-RC LPF for IEEE 802.15.4a UWB WPAN
(2009)
Tuan-Phan, Anh; Farrell, Ronan ; Gug-Lee, Sang; Lee, Jeongseon
Abstract:
This paper describes a wide-band sharp-rejection active-RC low pass filter (LPF) for pulse-based UWB IEEE 802.15.4a WPA, applications. Sharp rejection is attributed to the combination of different AC characteristic of three biquads in series. A simple operational amplifier (Op-amp) is adopted to ensure high frequency performance for the designed filter. The LPF is designed in 0.13μm TSMC CMOS process. The cutoff frequency is 380MHz with about 50% of the tuning range from 300-500MHz. The rejection is 40 dB at 600 MHz. The passband ripple is less than 1.5dB and the filter consumes 4.6mA from 1.2V supply. Core chip size is 580 x 700μm2.
http://eprints.maynoothuniversity.ie/1458/
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Power Management for Stationary Machines
(2005)
CAHILL, VINNY
Power Management for Stationary Machines
(2005)
CAHILL, VINNY
Abstract:
This paper examines effective power management of users? stationary desktop PCs in a pervasive computing office environment. The objective being to minimise the building?s electricity consumption while maintaining acceptable desktop PC performance. Current state of the art power management is focused on developing polices for mobile devices, which are ineffective for stationary machines. Effective stationary policies need to obtain context from the user of the machine, but there is a balance between what detail of context is necessary and how much this extra context costs both monetarily and energy wise. We have implemented two location aware policies which detect presence of the user?s Bluetooth enabled mobile phone. Trial results indicate that with these policies it is possible to get within 8% of optimal energy consumption with little performance degrade. However, this is the best case and the results are dependent on the user?s usage patterns and the geographical layout of the o...
http://hdl.handle.net/2262/32546
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Ultra-fast 1+1 protection in 10 Gb/s symmetric long reach PON
(2013)
PAYNE, DAVID; RUFFINI, MARCO; MCGETTRICK, S?AMAS
Ultra-fast 1+1 protection in 10 Gb/s symmetric long reach PON
(2013)
PAYNE, DAVID; RUFFINI, MARCO; MCGETTRICK, S?AMAS
Abstract:
In this paper we evaluate PON protection switching times using our FPGA-based hardware implementation of a Long-Reach PON protocol based on the XGPON standard. We first compare reactivation times of different 1+1 protection scenarios, and then we propose hardware modifications to reduce PON protection times
http://hdl.handle.net/2262/68253
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3D estimation and visualization of motion in a multicamera network for sports
(2011)
Kelly, Philip; O'Connor, Noel E.
3D estimation and visualization of motion in a multicamera network for sports
(2011)
Kelly, Philip; O'Connor, Noel E.
Abstract:
In this work, we develop image processing and computer vision techniques for visually tracking a tennis ball, in 3D, on a court instrumented with multiple low cost IP cameras. The technique first extracts 2D ball track data from each camera view, using object tracking methods. Next, an automatic feature- based video synchronization method is applied. This technique uses both the extracted 2D ball information from two or more camera views, plus camera calibration information. Then, in order to find 3D trajectory, the temporal 3D locations of the ball is estimated using triangulation of correspondent 2D locations obtained from automatically synchronized videos. Furthermore, we also incorporate a physics-based trajectory model into the system to improve the continuity of the tracked 3D ball during times when no two cameras have overlapping views of the ball location. The resultant 3D ball tracks are then visualized in a virtual 3D graphical environment. Finally, we quantify the accurac...
http://doras.dcu.ie/16575/
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3D facial landmark localization using combinatorial search and shape regression
(2012)
Sukno, Federico M.; Waddington, John L.; Whelan, Paul F.
3D facial landmark localization using combinatorial search and shape regression
(2012)
Sukno, Federico M.; Waddington, John L.; Whelan, Paul F.
Abstract:
This paper presents a method for the automatic detection of facial landmarks. The algorithm receives a set of 3D candidate points for each landmark (e.g. from a feature detector) and performs combinatorial search constrained by a deformable shape model. A key assumption of our approach is that for some landmarks there might not be an accurate candidate in the input set. This is tackled by detecting partial subsets of landmarks and inferring those that are missing so that the probability of the deformable model is maximized. The ability of the model to work with incomplete information makes it possible to limit the number of candidates that need to be retained, substantially reducing the number of possible combinations to be tested with respect to the alternative of trying to always detect the complete set of landmarks. We demonstrate the accuracy of the proposed method in a set of 144 facial scans acquired by means of a hand-held laser scanner in the context of clinical craniofacial...
http://doras.dcu.ie/18572/
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3D image analysis for pedestrian detection
(2006)
Kelly, Philip; Cooke, Eddie; O'Connor, Noel E.; Smeaton, Alan F.
3D image analysis for pedestrian detection
(2006)
Kelly, Philip; Cooke, Eddie; O'Connor, Noel E.; Smeaton, Alan F.
Abstract:
A method for solving the dense disparity stereo correspondence problem is presented in this paper. This technique is designed specifically for pedestrian detection type applications. A new Ground Control Points (GCPs) scheme is introduced, using groundplane homography information to determine regions in which good GCPs are likely to occur. The method also introduces a dynamic disparity limit constraint to further improve GCP selection and dense disparity generation. The technique is applied to a real world pedestrian detection scenario with a background modeling system based on disparity and edges.
http://doras.dcu.ie/381/
Displaying Results 126 - 150 of 10754 on page 6 of 431
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All Ireland Public Health R... (18)
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