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Articles 3091 - 3120 of 4158
Full-Text Articles in Engineering
Proceedings Of The Iccbr 2009 Workshops, Sarah Jane Delany
Proceedings Of The Iccbr 2009 Workshops, Sarah Jane Delany
Books/Book chapters
In 2009 the workshop programme includes four workshops, two of which are workshops in well recognised CBR research areas continuing the well established,successful workshops on Case-Based Reasoning in the Health Sciences and on Uncertainty, Knowledge Discovery and Similarity. There are also two new workshops which explore developing areas of CBR research, namely Reasoning from Experiences on the Web (WebCBR) and Case-Based Reasoning for Computer Games.
Analysis And Evaluation Of The Dynamic Performance Of Sma Actuators For Prosthetic Hand Design, Kevin O'Toole, Mark Mcgrath, Eugene Coyle
Analysis And Evaluation Of The Dynamic Performance Of Sma Actuators For Prosthetic Hand Design, Kevin O'Toole, Mark Mcgrath, Eugene Coyle
Articles
It is widely acknowledged within the biomedical engineering community that shape memory alloys (SMAs) exhibit great potential for application in the actuation of upper limb prosthesis designs. These lightweight actuators are particularly suitable for prosthetic hand solutions. A four-fingered, 12 degree-of-freedom prosthetic hand has been developed featuring SMA bundle actuators embedded within the palmar structure. Joule heating of the SMA bundle actuators generates sufficient torque at the fingers to allow a wide range of everyday tasks to be carried out. Transient characterization of SMA bundles has shown that performance/response during heating and cooling differs substantially. Natural convection is insufficient to …
Therapeutic Ultrasound Angioplasty: The Risk Of Arterial Perforation. An In Vitro Study, Mark Wylie, Garrett Mcguinness, Graham Gavin
Therapeutic Ultrasound Angioplasty: The Risk Of Arterial Perforation. An In Vitro Study, Mark Wylie, Garrett Mcguinness, Graham Gavin
Conference Papers
The use of therapeutic ultrasound delivered via small diameter wire waveguides may represent an emerging minimally invasive approach in the treatment of chronic total occlusions (CTOs), calcified and fibrous plaques. The distal-tip mechanical vibrations (typically 0-210 μm peak-to-peak) have been reported to debulk rigid calcified and fibrous tissues while healthy elastic arterial tissue remains largely unaffected. The risk of arterial (healthy tissue) perforation with energized waveguides is not fully understood. An ultrasonic apparatus capable of delivering a range of wire waveguide distal-tip displacements, up to 80 μm peak-to-peak (p-p), at an operational frequency of 22.5 KHz (+/- 6%) has been …
Antenna Optimization With A Computationally Efficient Multiobjective Evolutionary Algorithm, Matthias John, Max Ammann
Antenna Optimization With A Computationally Efficient Multiobjective Evolutionary Algorithm, Matthias John, Max Ammann
Articles
An efficient multiobjective evolutionary algorithm is described for optimizing a novel spline based printed monopole antenna. The antenna geometry is based on spline outlines. Both radiating element and groundplane are simultaneously optimized by the algorithm. The resulting antenna performance is evaluated. It is shown that the evolutionary algorithm and the spline geometry can be used to efficiently generate ultrawideband antennas on limited computing resources.
Microstrip-Fed Dual-Frequency Annular-Slot Antenna Loaded By Split-Ring-Slot, Xiulong Bao, Max Ammann
Microstrip-Fed Dual-Frequency Annular-Slot Antenna Loaded By Split-Ring-Slot, Xiulong Bao, Max Ammann
Articles
A compact dual-band annular-slot antenna loaded by a concentric split-ring-slot is presented. A stepped microstrip feedline enables the control of the coupling and provides good matching. The annular-slot is connected to the split-ring-slot by a rectangular slot, which increases the surface of the current path, thus notably reducing the resonant frequency for a given size. The embedded split-ring-slot structure allows many resonant modes to be realised. By tuning the key parameters, these operating modes and their bandwidths can be controlled. A wide bandwidth can be realised for either the lower band, upper band or both bands simultaneously, depending on the …
Generalised Design Process For Fiber-Bend-Loss-Based Edge Filters For A Wavelength Measurement System, Pengfei Wang, Gerald Farrell, Yuliya Semenova
Generalised Design Process For Fiber-Bend-Loss-Based Edge Filters For A Wavelength Measurement System, Pengfei Wang, Gerald Farrell, Yuliya Semenova
Articles
We investigate and present a generalized methodology for the design of a fiber-bend-loss-based edge filter, starting with the task of evaluating and selecting suitable fibers and then considering the design of a fiber-bending-loss edge filter. As an example to illustrate the methodology, a Corning SMF28e fiber with a 900 μmdiameter is selected and two sample edge filters are designed for experimental verification. The designed edge filters are compact, easy to fabricate, meet target spectral specifications, and show low polarization-dependent loss, confirming the effectiveness of the proposed methodology for fiber-bend-loss-based edge filter design.
Use Of A Single-Multiple-Single-Mode Fiber Filter For Interrogating Fiber Bragg Grating Strain Sensors With Dynamic Temperature Compensation, Qiang Wu, Muhammad Hatta, Yuliya Semenova, Gerald Farrell
Use Of A Single-Multiple-Single-Mode Fiber Filter For Interrogating Fiber Bragg Grating Strain Sensors With Dynamic Temperature Compensation, Qiang Wu, Muhammad Hatta, Yuliya Semenova, Gerald Farrell
Articles
An interrogation technique for fiber Bragg grating (FBG) strain sensors with dynamic temperature compensation using a single-multiple-single-mode (SMS) fiber filter as a temperature compensating element is presented. Experimental results show that this technique offers a resolution of better than 3:4 με for strain measurements in the range from 0 to 1667 με, and the temperature induced error is as low as 34 με in the temperature range from 10 to 60 °C. The temperature induced error could be further reduced if the temperature sensitivity (the rate of temperature induced wavelength shift) of the SMS filter was closer to that of …
Investigation Of Polarization Dependent Loss For A Macrobending Loss, Pengfei Wang, Gerald Farrell, Yuliya Semenova, Ginu Rajan
Investigation Of Polarization Dependent Loss For A Macrobending Loss, Pengfei Wang, Gerald Farrell, Yuliya Semenova, Ginu Rajan
Articles
An investigation of the polarization dependent loss (PDL) of macrobending
loss sensitive single fiber (1060XP) is presented theoretically and experimentally. The
experimental results are in good agreement with the modeling outcomes. Through the
comparison of experimental results of PDL between 1060XP fiber with coatings and
bare 1060XP fiber, it is shown that the fiber coating has significant impact on the PDL
of bend loss sensitive singlemode fiber
Identity Management To Support Access Control In E-Health Systems, Xu Chen, Damon Berry, William Grimson
Identity Management To Support Access Control In E-Health Systems, Xu Chen, Damon Berry, William Grimson
Conference Papers
The related and often challenging topics of identity management and access control form an essential foundation for e-health infrastructure. Several approaches and supporting specifications for electronic healthcare record system (EHR-S) communication have been proposed by research projects and standards development organizations in recent years. For instance, part four of the CEN TC251 EN13606 EHRcom standard and the HL7 Role Based Access Control Draft Standard for Trial Use have helped to specify the nature of access control behaviour in relation to EHR communication within and between healthcare organisations. Access control services are a core component not only of the integrated care …
Zero-Broadening Measurement In Brillouin Based Slow-Light Delays, Andrzej Wiatrek, Ronny Henker, Stefan Preußler, Max Ammann, Andreas Schwarzbacher, Thomas Schneider
Zero-Broadening Measurement In Brillouin Based Slow-Light Delays, Andrzej Wiatrek, Ronny Henker, Stefan Preußler, Max Ammann, Andreas Schwarzbacher, Thomas Schneider
Articles
A novel method for the achievement of zero-broadening in a SBS based slow-light system is discussed in theory and demonstrated experimentally. The system is realized just with a single broadened Brillouin gain. It is shown, that if the gain bandwidth is much broader than the initial pulse width, the output pulse width decreases with increasing pump power. A compression of approximately 90 % of the initial pulse width was achieved in simulation and experiment.
Simulation Of A Tubular Solid Oxide Fuel Cell Stack Operating On Biomass Syn-Gas Using Aspen Plus, Wayne Doherty, Anthony Reynolds, David Kennedy
Simulation Of A Tubular Solid Oxide Fuel Cell Stack Operating On Biomass Syn-Gas Using Aspen Plus, Wayne Doherty, Anthony Reynolds, David Kennedy
Articles
A tubular solid oxide fuel cell (SOFC) stack is modelled and its operation on biomass syn-gas is investigated. The objective of this work is to develop a computer simulation model of a biomass gasification-SOFC (BG-SOFC) system capable of predicting performance under various operating conditions and using diverse fuels. The stack is modelled using Aspen Plus and considers ohmic, activation and concentration losses. It is validated against published data for operation on natural gas. Operating parameters such as fuel and air utilisation factor (Uf and Ua), current density (j) and steam to carbon ratio ( …
Thermal Spray Coatings: Effect Of Selected Coating Parameters On Corrosion Resistance, David Culliton, David Kennedy, Tony Betts, P. Concannon
Thermal Spray Coatings: Effect Of Selected Coating Parameters On Corrosion Resistance, David Culliton, David Kennedy, Tony Betts, P. Concannon
Conference Papers
Thermal Spray coatings have long been adopted as a surface modification technique. Unique in their ability to mechanically bond to the surface of most substrate materials, the Thermal Spray coatings offer a generic solution to improving mechanical, corrosion or tribo-corrosion properties of the affected substrate material. Of the available systems, Flame Spray techniques offer the simplest and most cost-effective method of applying these coatings. In the current study, an investigation was conducted into the comparative performance of a selection of these coating systems – a polymer coating, with various coating thicknesses, and a metallic coating - in a number of …
Marine Current Energy Status And Its Potential In Ireland, Fergal O'Rourke, Fergal Boyle, Anthony Reynolds
Marine Current Energy Status And Its Potential In Ireland, Fergal O'Rourke, Fergal Boyle, Anthony Reynolds
Other resources
The energy consumption in Ireland is primarily achieved by the combustion of fossil fuels. As well as fossil fuels continually becoming more expensive and fluctuating in price, their use as an energy source also has a negative impact on the environment. Ireland’s energy consumption can be separated into three separate divisions: transportation, electricity generation and heat energy. The use of marine current energy technologies will assist in sustainable development as well as being a solution to several energy related environmental problems. Energy extraction using this technology offers a vast and predictable energy source. However, marine current energy technology is still …
Land Use Planning In Ireland: A Life Cycle Energy Analysis Of Recent Residential Development In The Greater Dublin Area, Aidan Duffy
Articles
Background, aim, and scope: One third of the total housing stock in the Republic of Ireland has been built in 10 years up to and including 2006 and of this approximately 34% was built in the Greater Dublin Area (GDA). Much of the housing was low-density with poor public transport links leading to doubts over its sustainability—particularly in terms of energy use. Although the country is committed to reducing greenhouse gases to 13% above 1990 levels by the period 2008–2012, by 2005, emissions were already 25.4% higher than the aseline and current projections are that this figure will rise to …
Supply Chain Management And Logistics In A Volatile Global Environment, Edward Sweeney
Supply Chain Management And Logistics In A Volatile Global Environment, Edward Sweeney
Books/Book chapters
No abstract provided.
Supply Chain Management And The Value Chain, Edward Sweeney
Supply Chain Management And The Value Chain, Edward Sweeney
Practitioner Journals
No abstract provided.
Supply Chain Management In A Recession, Edward Sweeney
Supply Chain Management In A Recession, Edward Sweeney
Practitioner Journals
No abstract provided.
Improving Supply Chain Performance, Edward Sweeney
Improving Supply Chain Performance, Edward Sweeney
Practitioner Journals
No abstract provided.
A Mobile Ecg Monitoring System With Context Collection, Jin Peng Li, Damon Berry, Richard Hayes
A Mobile Ecg Monitoring System With Context Collection, Jin Peng Li, Damon Berry, Richard Hayes
Conference Papers
Preventative health management represents a shift from the traditional approach of reactive treatment-based healthcare towards a proactive wellness-management approach where patients are encouraged to stay healthy with expert support when they need it, at any location and any time. This work represents a step along the road towards proactive, preventative healthcare for cardiac patients. It seeks to develop a smart mobile ECG monitoring system that requests and records context information about what is happening around the subject when an arrhythmia event occurs. Context information about the subject’s activities of daily living will, it is hoped, provide an enriched data set …
A Novel Ep Approach For Multi-Area Economic Dispatch With Multiple Fuel Options, P. S. Manoharan, P. S. Kannan, V. Ramanathan
A Novel Ep Approach For Multi-Area Economic Dispatch With Multiple Fuel Options, P. S. Manoharan, P. S. Kannan, V. Ramanathan
Turkish Journal of Electrical Engineering and Computer Sciences
This paper presents a novel approach to multi-area economic dispatch problems with multiple fuel options using a hybrid evolutionary programming method. The objective is to minimize the operation cost of the entire system while satisfying the tie line constraints. In this paper, EP-LMO (Evolutionary Programming with Levenberg-Marquardt Optimization) technique is proposed to solve multi-area economic dispatch problems with multiple fuel options. The EP-LMO is developed in such a way that a simple evolutionary programming (EP) is applied as a base level search to find the direction of the optimal global region. And Levenberg-Marquardt Optimization (LMO) method is used as a …
Vlsi-Cell Placement Technique For Architecture Of Field Programmable Gate Array (Fpga) Design, Avnesh Verma, Sunil Dhingra, M. K. Soni
Vlsi-Cell Placement Technique For Architecture Of Field Programmable Gate Array (Fpga) Design, Avnesh Verma, Sunil Dhingra, M. K. Soni
Turkish Journal of Electrical Engineering and Computer Sciences
The Field Programmable Gate Array (FPGA) is an on field programmable device which can be designed for different applications. Various types of software are available for its synthesis. The cell placement depends upon the designing and programming languages used for FPGA. In this paper cell placement technique of FPGA architecture is analyzed for the application of Space Vector Pulse Width Modulation (SVPWM) technique used in speed control of an induction motor. The modulation pulses are produced due to the various components activated and their interconnection in Configurable Logic Blocks (CLBs). Few of its components are so analyzed to find out …
Modeling And Calculation Of Electromagnetic Field In The Surroundings Of A Large Power Transformer, Leonardo Strac, Franjo Kelemen, Damir Zarko
Modeling And Calculation Of Electromagnetic Field In The Surroundings Of A Large Power Transformer, Leonardo Strac, Franjo Kelemen, Damir Zarko
Turkish Journal of Electrical Engineering and Computer Sciences
The presented study compares measured and calculated electromagnetic field quantities in the surroundings of a large power transformer with the aim to avoid the necessity of measuring the field on subsequent units and use a computer model instead. The influences of various objects located in the vicinity of the transformer during measurement are also analyzed and are taken into account in a computer model.
Highway Bridge Assessment For Dynamic Interaction With Critical Vehicles, Daniel Cantero, Eugene J. Obrien, Arturo González, Bernard Enright, Cillian Rowley
Highway Bridge Assessment For Dynamic Interaction With Critical Vehicles, Daniel Cantero, Eugene J. Obrien, Arturo González, Bernard Enright, Cillian Rowley
Conference papers
Dynamic vehicle-bridge interaction is often considered for the most common classes of vehicle such as the 5-axle articulated truck. However, the dynamic response of bridges to this type of trucks is quite different to the response to the vehicles more likely to feature in maximum-in-lifetime traffic loading events. This paper focuses on large (>100 tonne) cranes and crane-type vehicles that have been recorded at Weigh-in-Motion sites in Europe. This paper analyses the total bending moment due to these vehicles on short to medium span bridges and compare them to 5- axle articulated trucks. To account for the variability in …
Integration Of Microstrip Patch Antennas With Polycrystalline Silicon Solar Cells, S. Shynu, Maria Roo Ons, Max Ammann, Sarah Mccormack, Brian Norton
Integration Of Microstrip Patch Antennas With Polycrystalline Silicon Solar Cells, S. Shynu, Maria Roo Ons, Max Ammann, Sarah Mccormack, Brian Norton
Articles
The implementation of a polycrystalline silicon solar cell as a microwave groundplane in a low-profile, reduced-footprint microstrip patch antenna design for autonomous communication applications is reported. The effects on the antenna/solar performances due to the integration, different electrical conductivities in the silicon layer and variation in incident light intensity are investigated. The antenna sensitivity to the orientation of the anisotropic solar cell geometry is discussed.
Emitter-Wrap-Through Photovoltaic Dipole Antenna With Solar Concentrator, Maria Roo Ons, S. Shynu, Max Ammann, Sarah Mccormack, Brian Norton
Emitter-Wrap-Through Photovoltaic Dipole Antenna With Solar Concentrator, Maria Roo Ons, S. Shynu, Max Ammann, Sarah Mccormack, Brian Norton
Articles
A novel photovoltaic dipole antenna employing a solar concentrator as a reflector is proposed. Four identical emitter-wrap-through rear contact solar cells connected in series as a folded dipole are simultaneously used for power generation and as the antenna radiating element, which is located in the focal line of a parabolic solar concentrator. The parabolic structure acts as a solar concentrator for the photovoltaic cells as well as a reflector for the folded dipole antenna. Full-wave electromagnetic simulation with supportive experimental work validates this design. The measured fractional impedance bandwidth and gain were 21% and 11.1 dBi, respectively. The antenna/solar arrangement …
Creating A Software Marketplace For The Sme Community In The Irish Construction Industry, Alan V. Hore, Roger West, Alan Redmond
Creating A Software Marketplace For The Sme Community In The Irish Construction Industry, Alan V. Hore, Roger West, Alan Redmond
Conference papers
The Construction Industry is a sector where Information Communication Technology (ICT) and e-Business are used to a lesser extent than in most other sectors. The high concentration of Small to Medium sized Enterprises (SMEs) in the industry and the typical nature of the service provided, being an on-site and often highly customised service are generally identified as the reason for the low ICT uptake. The majority of Irish companies in the construction sector are SMEs. E-Business has provided the construction SME industry the opportunity to compete globally. The Construction IT Alliance (CITA) has identified a programme that can create a …
Icpma Knowledge Management Centre – Sharing Knowledge In The International Construction Project Management Community, Louis Gunnigan, Wilhelm Reismann
Icpma Knowledge Management Centre – Sharing Knowledge In The International Construction Project Management Community, Louis Gunnigan, Wilhelm Reismann
Conference papers
In 2007, The International Construction Project Management Association (ICPMA) established a Knowledge Management Centre (KMC) the objective of which is to share experiences of construction project management amongst academics and practitioners across the globe. A strategy for the KMC was developed and a number of areas were identified as being relevant to the members of the international construction project management community. This paper examines the development of the KMC to date and establishes the achievements to date. The difficulties encountered in the development of the KMC are identified and the causes of these difficulties established. The plan for the future …
Creating A Digital Sme Community In The Irish Construction Industry, Alan V. Hore, Roger West, Alan Redmond
Creating A Digital Sme Community In The Irish Construction Industry, Alan V. Hore, Roger West, Alan Redmond
Conference papers
The Construction Industry is a sector where ICT and e-business are used to a lesser extent than in most other sectors. The high concentration of SMEs in the construction industry and the typical nature of the service provided in construction, being an on-site and often highly customised service are generally identi-fied as the reason for the low ICT uptake. The majority of Irish companies in the construction sector are SMEs. It is essential that Irish companies become more effective and efficient with eBusiness technologies in order to compete in the global economy. The Construction IT Alliance in Ireland has identified …
Evaluating Ground Truth For Adress As A Preprocess For Automatic Musical Instrument Identification, Joseph Mckay, Mikel Gainza, Dan Barry
Evaluating Ground Truth For Adress As A Preprocess For Automatic Musical Instrument Identification, Joseph Mckay, Mikel Gainza, Dan Barry
Conference papers
Most research in musical instrument identification has focused on labeling isolated samples or solo phrases. A robust instrument identification system capable of dealing with polytimbral recordings of instruments remains a necessity in music information retrieval. Experiments are described which evaluate the ground truth of ADRess as a sound source separation technique used as a preprocess to automatic musical instrument identification. The ground truth experiments are based on a number of basic acoustic features, while using a Gaussian Mixture Model as the classification algorithm. Using all 44 acoustic feature dimensions, successful identification rates are achieved.
On The Use Of The Beta Divergence For Musical Source Separation, Derry Fitzgerald, Matt Cranitch, Eugene Coyle
On The Use Of The Beta Divergence For Musical Source Separation, Derry Fitzgerald, Matt Cranitch, Eugene Coyle
Conference papers
Non-negative Tensor Factorisation based methods have found use in the context of musical sound source separation. These techniques require the use of a suitable cost function to determine the optimal factorisation, and most work has focused on the use of the generalised Kullback-Liebler divergence, and more recently the Itakura-Saito divergence. These divergences can be regarded as limiting cases of the parameterised Beta divergence. This paper looks at the use of the Beta Divergence in the context of musical source separation with a view to determining an optimal value of Beta for this problem. This is considered for both magnitude and …