Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Electrical and Computer Engineering (27)
- Controls and Control Theory (10)
- Other Engineering (9)
- Biomedical Engineering and Bioengineering (8)
- Civil and Environmental Engineering (7)
-
- Computer Engineering (6)
- Construction Engineering and Management (4)
- Materials Science and Engineering (3)
- Operations Research, Systems Engineering and Industrial Engineering (3)
- Other Operations Research, Systems Engineering and Industrial Engineering (3)
- Physical Sciences and Mathematics (3)
- Applied Mathematics (2)
- Arts and Humanities (2)
- Education (2)
- Mechanical Engineering (2)
- Music (2)
- Other Computer Engineering (2)
- Other Music (2)
- Applied Mechanics (1)
- Biological and Chemical Physics (1)
- Biomechanics and Biotransport (1)
- Biomedical (1)
- Biomedical Devices and Instrumentation (1)
- Ceramic Materials (1)
- Civil Engineering (1)
- Computer Sciences (1)
- Control Theory (1)
- Electrical and Electronics (1)
- Environmental Engineering (1)
- Keyword
-
- Construction (2)
- Data sonification (2)
- Dead-time compensator (2)
- Dna sonification (2)
- ICT (2)
-
- Music transcription (2)
- Onset detection (2)
- PID control (2)
- Purchasing (2)
- Sound source separation (2)
- Supply chain (2)
- Tin whistle (2)
- (Pb (1)
- 1.3 to 5.5 GHz 1.5 GHz azimuth plane electromagnetically coupled elements feed optimization impedance bandwidth lower edge frequency reduction (1)
- 21st century (1)
- 3d engineering (1)
- Addtional quality factors for WWW (1)
- All-optical switch (1)
- Angular misalignment (1)
- Arctangent function (1)
- Audio time scale modification (1)
- Automatic control (1)
- Autonomic nervous system (1)
- Azimuth discrimination (1)
- Azimuth discrimination and reynthesis algorithm (1)
- Ba)TiO3 powders (1)
- Balanced truncation (1)
- Bioprocessing (1)
- Building Materials (1)
- Capacitor/inductor electronic power switching filter design glass furnace production utilities glass viscosity harmonic distortion idling asynchronous motor power quality temperature control two-phase industrial load unbalanced nonlinear loads (1)
Articles 1 - 30 of 71
Full-Text Articles in Engineering
Intelligent Simulation-Based Lot Scheduling Of Photolithography Toolsets In A Wafer Fabrication Facility, Amr Arisha, Paul Young
Intelligent Simulation-Based Lot Scheduling Of Photolithography Toolsets In A Wafer Fabrication Facility, Amr Arisha, Paul Young
Conference papers
Scheduling of a semiconductor manufacturing facility is one of the most complex tasks encountered. Confronted with a high technology product market, semiconductor manufacturing is increasingly more dynamic and competitive in the introduction of new products in shorter time intervals. Photolithography, being one of the processes repeated often, is a fabrication bottleneck. Lot scheduling within photolithography is a challenging activity where substantial improvements in factory performance can be made. The proposed scheduling methodology integrates two common approaches, simulation and artificial intelligence. Using detailed simulation modeling within a structured modeling method, a comprehensive model to characterize the photolithography process was developed. An …
Local Model Network Application In Control, Ruiyao Gao
Local Model Network Application In Control, Ruiyao Gao
Doctoral
The local model (LM) network is considered for the control of complex nonlinear systems. Both controller design and system analysis techniques are investigated for the Purpose of the development of an overall global controller with guaranteed stability and performance, based on the control methods and theories well developed for linear systems. In particular, the influence of the offset term of affine LM networks on the performance and stability of closed-loop systems is investigated. Assuming the system changes ‘slowly’ enough, an integrator can be utilised in the controller design by considering the offset term as ‘constant’. Gain-scheduled local controller (LC) networks …
Peer-To-Peer Searching And Sharing Of Electronic Documents, Paul Stacey
Peer-To-Peer Searching And Sharing Of Electronic Documents, Paul Stacey
Masters
Peer-to-peer systems have existed since the first incarnation of the Internet. In recent times the Internet has taken on a more hierarchical form, power has been taken away from the individual and placed in the hands of operators of large servers. However, with the re-emergence of p2p the individual is gaining more freedom. End users attached to the Internet now have the power to host and publish content through the user of p2p technologies. Peer-to-peer systems present significant design challenges and have opened up a floodgate of research in an effort to overcome some of the fundamental problems. This thesis …
A Multi-Criteria Approach To The Evaluation Of Aviation E-Marketplace Portals, Edward Sweeney, Emilio Esposito, Pietro Evangelista, Michel Mastroianni, Renato Passaro, Claudia-Maria Wagner
A Multi-Criteria Approach To The Evaluation Of Aviation E-Marketplace Portals, Edward Sweeney, Emilio Esposito, Pietro Evangelista, Michel Mastroianni, Renato Passaro, Claudia-Maria Wagner
Conference papers
After a proliferation of logistics e-Marketplaces during the dot.com boom of 1998-2000, there has been a high rate of failure and survivals are developing much more slowly than expected. This is the case of aviation industry where a large number of B2B e-Marketplaces emerged according to the focus of aviation companies’ strategies on electronic B2B in the late 1990s. However, the current use of e-Marketplaces in the industry is low and many of them have ceased trading. The traditional e-Marketplaces model have been characterised by poor quality of portals and the lack of technical standards. Such an approach is unsustainable …
Sustainable Water Supply In Ireland, Liam Mccarton, Sean O'Hogain
Sustainable Water Supply In Ireland, Liam Mccarton, Sean O'Hogain
Reports
Sustainable water technology is concerned with the complete range of technologies, techniques, products and processes that will enable humankind to reduce the impact of water production and water consumption on the environment and to establish a more sustainable mode of development. The concept of sustainable development has gained wide usage over the past 15 years in an attempt to balance development needs and environmental protection. The Brundtland Report of the World Commission on Environment and Development, Our Common Future (1987) identified sustainable development as a global objective, which involved economic, social and environmental values. It defined sustainable development as ‘ …
Techniques For Investigation Of Surgical Cutting Instruments, Eamon Price, Ger Reilly, Brendan Mccormack, Andrew Macey
Techniques For Investigation Of Surgical Cutting Instruments, Eamon Price, Ger Reilly, Brendan Mccormack, Andrew Macey
Conference Papers
No abstract provided.
Direct Least-Squares Ellipse Fitting, Jane Courtney, Annraoi Depaor
Direct Least-Squares Ellipse Fitting, Jane Courtney, Annraoi Depaor
Conference Papers
Many biological and astronomical forms can be best represented by ellipses. While some more complex curves might represent the shape more accurately, ellipses have the advantage that they are easily parameterised and define the location, orientation and dimensions of the data more clearly. In this paper, we present a method of direct least-squares ellipse fitting by solving a generalised eigensystem. This is more efficient and more accurate than many alternative approaches to the ellipse-fitting problem such as fuzzy c-shells clustering and Hough transforms. This method was developed for human body modelling as part of a larger project to design a …
Pressure Distribution Around Spherical Distal Ball-Tip In Ultrasound Angioplasty, Graham Gavin, Garrett B. Mcguinness, Finbar Dolan, M.S. J. Hashmi
Pressure Distribution Around Spherical Distal Ball-Tip In Ultrasound Angioplasty, Graham Gavin, Garrett B. Mcguinness, Finbar Dolan, M.S. J. Hashmi
Conference Papers
INTRODUCTION Ultrasound Angioplasty has been shown to be effective in the removal and re-canalising of blockages in arteries (Siegel RJ, 1993). By delivering therapeutic ultrasound to the blockage, via a wire waveguide to a ball-tip, the lesion or thrombus is affected by pressure waves, micro streaming, cavitation and direct contact with the oscillating ball-tip. Most work to date has concentrated on a spherical ball-tip geometry at the distal end of the wire waveguide (Steffen, 1994 and Rosenschein, 1996). Tip displacements usually lie between 10 - 100m (peak-to peak) and ball tip diameters between 1 - 2mm (Atar, 1999 and Yock, …
A New High Power Parallel Converter Scheme For Active Power Filters, Malabika Basu, S. P. Das, Gopal Dubey
A New High Power Parallel Converter Scheme For Active Power Filters, Malabika Basu, S. P. Das, Gopal Dubey
Articles
A new topology for efficient utilisation of parallel converters as VAR compensators and active power filters (APF) for high power loads is proposed. Because of limited power handling capacity of individual devices, paralleling is the choice to increase rating of equipment, while keeping the THD of the current at the PCC within the agency specified standards. It has been reported in the literature that paralleling several converters, rather than switches, is more reliable in sharing of load. From this perspective, multilevel converters carry lot of weight, as their typical power circuit configuration limits the stress on individual devices to an …
Simple Feature Identification And Matching For Stereoscopic Imaging, Jane Courtney, Annraoi Depaor
Simple Feature Identification And Matching For Stereoscopic Imaging, Jane Courtney, Annraoi Depaor
Conference Papers
Many camera calibration techniques used in stereoscopic imaging require corresponding points in image pairs to be identified. The best matches tend to come from very distinctive regions, hence it is preferable to use only these points and reject points from more homogeneous regions. Often points are selected and matched by a combination of user input and automated matching. However, for most techniques, the more matching points identified, the more accurate and robust the calibration. Therefore, it is desirable to alleviate the need for user input and to automate the point selection process. In the feature matching technique described here, a …
A Vocalisation-Based Drawing Interface For Disabled Children, Ted Burke
A Vocalisation-Based Drawing Interface For Disabled Children, Ted Burke
Articles
In our work with disabled children at Ireland’s National Rehabilitation Hospital, a problem we have experienced in the facilitation of art activities is that traditional art materials and standard computer drawing programs sometimes prove inaccessible. In this paper, an original system, called “PaintMyVoice” is presented which facilitates the creation of two or three-dimensional images using a variety of novel input modalities. In particular, vocalisations can be used to create original images of a variety of objects, including trees, flowers and landscape elements. Additional input to the system can optionally be provided via mouse, keyboard, switch interface or digital camera depending …
A System For Monitoring Pressures And Spinal Curvature In Spinally Injured People Immobilised On A Spinal Raft, Ruairí De Fréin, Eoin Flinn, Ted Burke
A System For Monitoring Pressures And Spinal Curvature In Spinally Injured People Immobilised On A Spinal Raft, Ruairí De Fréin, Eoin Flinn, Ted Burke
Articles
We present a system designed to study the pressure at various ‘hot spots’ on the back of the body and the deformation of the spine experienced by a patient when strapped to a spinal board, and the potential alleviation of both by the addition of an inflatable “spinal raft” (or other similar device). In measuring pressure we devised a system of air-filled sacks interfaced with a PC. Each sack, placed under a particular key point on the body, is inflated until its faces just begin to separate and a switch thereby opens. The pressure reading is then captured and displayed …
Investigation Of Novel Liquid Crystal Materials For Their Possible Applications, Minseok Chang
Investigation Of Novel Liquid Crystal Materials For Their Possible Applications, Minseok Chang
Masters
In this thesis I present four main topics. One is an introduction to liquid crystals and the second is an opto-electronic experimental setup. The third is an investigation of the dynamic properties of dendrimers, which show ferroelectric features. The last one is a research focused on understanding of the structures of two different types of De Vries smectic A liquid crystal phases. All research activities are performed by the hand-made but automatically controlled opto-electronic experimental setup. First, an introduction to liquid crystals is presented in easy language. Mainly there are two kinds of liquid crystals, thermotropic and lyotropic, but I …
A Differentiated Services Architecture For Quality Of Service Provisioning In Wireless Local Area Networks, Tristan Raimondi
A Differentiated Services Architecture For Quality Of Service Provisioning In Wireless Local Area Networks, Tristan Raimondi
Masters
Currently the issue of Quality of Service (QoS) is a major problem in IP networks due to the growth in multimedia traffic (e.g. voice and video applications) and therefore many mechanisms like IntServ, DiffServ, etc. have been proposed. Since the IEEE 802.11b (or Wi-Fi) standard was approved in 1999, it has gained in popularity to become the leading Wireless Local Area Network (WLAN) technology with millions of such networks deployed worldwide. Wireless networks have a limited capacity (11 Mbits/s in the case of Wi-Fi networks) owing to the limited amount of frequency spectrum available. At any given time there may …
Design And Development Of A Respiratory Monitoring Device To Be Used In Conjuction With Mri Scanners, Aidan Mcnally
Design And Development Of A Respiratory Monitoring Device To Be Used In Conjuction With Mri Scanners, Aidan Mcnally
Masters
The aim of this project was to design and manufacture a respiratory monitoring device that operates in conjunction with MRI scanners to produce higher quality images. The resultant quality of many MRI images depends on how well the patient can control their breathing activity. This research has been successful in designing and manufacturing a device that can be used to teach patients how to hold their breath correctly prior to scanning and also provide them with feedback about their breathing activity during the scan The project involved research into MRI technology and the materials that can still be used in …
Mechano-Biological Interactions Of Endothelial Cells, Claire Brougham, Karen Coughlan, Valerie Barron, Peter Mchugh
Mechano-Biological Interactions Of Endothelial Cells, Claire Brougham, Karen Coughlan, Valerie Barron, Peter Mchugh
Conference Papers
Atherosclerosis is an ever-increasing cause of morbidity in the western world. Current surgical treatments include bypass grafts and coronary artery stents. However, there is still a need for alternative approaches especially for those who cannot receive conventional therapy. Tissue engineering is one such approach that may hold the key to the repair and regeneration. Tissue engineering is one such approach that may hold the key to the repair and regeneration of coronary arteries. Nevertheless, many questions need to be answered before a vialbe vascular tissie with the inherent properties of native tissue becomes a real contender with the surgical therapies …
Sound Source Separation: Azimuth Discrimination And Resynthesis, Dan Barry, Robert Lawlor
Sound Source Separation: Azimuth Discrimination And Resynthesis, Dan Barry, Robert Lawlor
Conference papers
This paper discusses a novel sound source separation algorithm which requires no prior knowledge, no learning, assisted or otherwise and performs the task of separation based purely on Azimuth discrimination within the stereo field. The algorithm exploits the use of the pan pot as a means to achieve image localisation within stereophonic recordings. As such, only an interaural intensity difference exists between left and right channels for a single source. The authors use gain scaling and phase cancellation techniques to expose frequency dependent nulls across the Azimuth domain from which source separation and resynthesis is carried out. Results are presented …
An Efficient Phasiness Reduction Technique For Moderate Audio Time-Scale Modification, David Dorran, Eugene Coyle, Robert Lawlor
An Efficient Phasiness Reduction Technique For Moderate Audio Time-Scale Modification, David Dorran, Eugene Coyle, Robert Lawlor
Conference papers
Phase vocoder approaches to time-scale modification of audio introduce a reverberant/phasy artifact into the time-scaled output due to a loss in phase coherence between short-time Fourier transform (STFT) bins. Recent improvements to the phase vocoder have reduced the presence of this artifact, however, it remains a problem. A method of time-scaling is presented that results in a further reduction in phasiness, for moderate time-scale factors by taking advantage of some flexibility that exists in the choice of phase required so as to maintain horizontal phase coherence between related STFT bins. Furthermore, the approach leads to a reduction in computational load …
Towards A Computer Assisted Violin Teaching Aid, Derry Fitzgerald, Jane Charles, Eugene Coyle
Towards A Computer Assisted Violin Teaching Aid, Derry Fitzgerald, Jane Charles, Eugene Coyle
Conference papers
This paper presents a possible approach for developing a violin teaching aid based on violin pedagogy, sound analysis and comparison of beginner and good player recordings. This teaching aid is targeted at students who have difficulty listening attentively to the sounds they produce. It aims to draw their attention to the sound of a fault, offer correction and to train the user's ear to actively listen.
Microwave Induced Preparation Of A-Axis Oriented Double-Ended Needle-Shaped Zno Microparticles, Suresh Pillai, John Kelly, Graeme Watson, Deirdre Ledwith
Microwave Induced Preparation Of A-Axis Oriented Double-Ended Needle-Shaped Zno Microparticles, Suresh Pillai, John Kelly, Graeme Watson, Deirdre Ledwith
Articles
Microwave irradiation of solutions of Zn(NO3)2 and urea provides a straightforward route to a-axis oriented crystals of needle-like morphology.
Low-Temperature Crystallization Of Sol–Gel Processed Pb0.5ba0.5tio3: Powders And Oriented Thin Films, Suresh Pillai, Stacey Boland, Sossina Haile
Low-Temperature Crystallization Of Sol–Gel Processed Pb0.5ba0.5tio3: Powders And Oriented Thin Films, Suresh Pillai, Stacey Boland, Sossina Haile
Articles
A novel sol– gel process suitable for depositing thin-film lead
barium titanate has been developed. X-ray diffraction analysis
showed perovskite phase crystallization to occur at a temperature
as low as 400°C with single-phase Pb0.5Ba0.5TiO3 (PBT)
resulting at a temperature as low as 500°C. Small concentrations
of barium carbonate were evident by X-ray diffraction at
400°C, and indications of minor, carbonate-containing phases
were evident by FTIR at 600°C. Deposition of the sol by spin
coating on single-crystal and thin-film MgO on silicon resulted
in highly oriented PBT films after calcination at 600°C. Mixed
(100)/(001) films were obtained on single-crystal MgO,
whereas …
Thin-Film Simulation Model For Comparing Production Schedules In A Semiconductor Fabrication Facility, Amr Arisha, Paul Young
Thin-Film Simulation Model For Comparing Production Schedules In A Semiconductor Fabrication Facility, Amr Arisha, Paul Young
Conference papers
Analysis of advanced manufacturing systems in any manufacturing industry requires certain level of knowledge about the system. Flexible manufacturing cells, in particular, are commonly used in most wafer fabrication to provide the ability to change product without requiring the construction of new manufacturing plant. This level of flexibility comes at a significant capital cost and, in order to achieve the maximum potential of each cell, it is essential to characterize and establish the performance of these cells in detail before a new production plan is implemented. Using state-of-the-art computer simulation and a structured modelling methodology a generic model of flexible …
An Investigation Into Appliance Durability In The Presence Of Power System Disturbances, Steven R. Mcgovern
An Investigation Into Appliance Durability In The Presence Of Power System Disturbances, Steven R. Mcgovern
Masters
The increased trend towards miniaturisation and greater efficiency in electronic equipment has also resulted in increased susceptibility to power system disturbances. Such equipment has become less tolerant to supply transients and variations and as a result there has been an increase in consumer product damage complaints. Greater consumer awareness has seen power quality become a major issue for both the domestic user and the utility companies. Arising from these issues an approach from the Electricity Supply Board of Ireland was made to engage into an investigation of the effects of power quality disturbances at the low-voltage domestic level. On commencement …
Purchasing Consortia And Electronic Markets: A Procurement Direction In Integrated Supply Chain Management, Bernd Huber, Edward Sweeney, Austin Smyth
Purchasing Consortia And Electronic Markets: A Procurement Direction In Integrated Supply Chain Management, Bernd Huber, Edward Sweeney, Austin Smyth
Articles
In supply chain management literature, there has been little empirical research investigation on purchasing consortium issues focusing on a detailed analysis of information and communication (ICT) based procurement strategies. Based on the exploration of academic literature and two surveys among purchasing organisations as well as e-Marketplaces / procurement service providers (PSPs) in the automotive and electronics industry sectors, the research methodology follows a positivistic approach in order to assess the overall statement: ‘Effective participation in electronic purchasing consortia (EPC) can have the potential to enhance competitive advantage. Implementation therefore requires a clear and detailed understanding of the major process structures …
Tradition Versus Technology: Careers Fairs In The 21st Century, Christiane Brennan, Margaret Daly, Eileen Fitzpatrick, Edward Sweeney
Tradition Versus Technology: Careers Fairs In The 21st Century, Christiane Brennan, Margaret Daly, Eileen Fitzpatrick, Edward Sweeney
Articles
The traditional methods of graduate recruitment do not adequately meet the needs of the changing profile of students and graduates. As industry becomes internationalized, the needs of employers are also changing. Graduate recruitment is in response to short term needs and varying levels of experience are required. A case study method was used in Technological University Dublin to evaluate effectiveness of a virtual careers fair in providing greater access to job opportunities for students and graduates. Access by employers to potential employees was also measured. Findings showed that while access improved, other issues requiring attention emerged.
Microstructural Analysis Of Varistors Prepared From Nanosize Zno, Suresh Pillai, Declan Mccormack, John Kelly, Ramesh Raghavendra
Microstructural Analysis Of Varistors Prepared From Nanosize Zno, Suresh Pillai, Declan Mccormack, John Kelly, Ramesh Raghavendra
Articles
No abstract provided.
Tuning Rules For Pi And Pid Control Of Time Delayed Processes: Some Recent Developments, Aidan O'Dwyer
Tuning Rules For Pi And Pid Control Of Time Delayed Processes: Some Recent Developments, Aidan O'Dwyer
Conference papers
The ability of PI and PID controllers to compensate many practical processes has led to their wide acceptance in industrial applications. The requirement to choose two or three controller parameters is most easily done using tuning rules. Starting with a general discussion of industrial practice, the paper will discuss, in particular, recent work in tuning rule development for processes with time delay.
Enabling The Re-Engineering Of Material Purchasing In The Construction Industry By The Effective Use Of Information Technology, Alan V. Hore, Roger West
Enabling The Re-Engineering Of Material Purchasing In The Construction Industry By The Effective Use Of Information Technology, Alan V. Hore, Roger West
Conference papers
The current methods of ordering, delivering and invoicing of materials in the construction industry is enormously inefficient, with vast quantities of paperwork, duplication of effort, scanning, re-keying and resolving mismatches between invoices, delivery dockets and purchase orders. This paper sets out the results of a successful 2005 pilot project which achieved a three-way electronic match of the purchase order, delivery note and supplier invoice information. The paper goes on to describe the opportunities and challenges of introducing such a system in the Irish construction industry
Printed Planar Monopole Antenna With Electromagnetically Coupled Elements, Jonathan Evans, Francisco Lerma, Max Ammann
Printed Planar Monopole Antenna With Electromagnetically Coupled Elements, Jonathan Evans, Francisco Lerma, Max Ammann
Conference papers
In this paper, the addition of an EM-coupled element to the printed planar monopole antenna is investigated. While remaining simple to construct, modifications to the EM-coupled element are shown to reduce the lower edge frequency of the 10 dB impedance bandwidth by up to ∼19% (280 MHz at 1.5 GHz). The radiation patterns for these antennas are characteristic of monopole antennas - i.e. omnidirectional in the azimuth plane with a at the zenith - and are consistent within +/- 2 dB across their useful impedance bandwidths. By optimizing the feed arrangements on these antennas a 10 dB impedance bandwidth ratio …
Studies In Cardiac Defribrillation, Eamonn Mckenna
Studies In Cardiac Defribrillation, Eamonn Mckenna
Masters
Cardiac disease resulting in cardiac arrest is one of the most common fatal diseases in the developed world. Defibrillation is the medical procedure used to correct the irregular cardiac rhythm (ventricular fibrillation (VF)) which is very often detected in patients suffering cardiac arrest. In the work reported in this thesis, two aspects of the defibrillation of patients in VF were examined. The first area of investigation concentrated on the use of multiple defibrillation electrodes to be used during closed chest (transthoracic) defibrillation. This study was carried out in a saline bath and centred on “focusing” electric fields from perimeter electrodes …