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Articles 4201 - 4230 of 4606
Full-Text Articles in Engineering
Job Shop Scheduling Problem: An Overview, Amr Arisha, Paul Young, Mohie El Baradie
Job Shop Scheduling Problem: An Overview, Amr Arisha, Paul Young, Mohie El Baradie
Conference papers
The Job-shop scheduling is one of the most important industrial activities, especially in manufacturing planning. The problem complexity has increased along with the increase in the complexity of operations and product-mix. To solve this problem, numerous approaches have been developed incorporating discrete event simulation methodology. The scope and the purpose of this paper is to present a survey which covers most of the solving techniques of Job Shop Scheduling (JSS) problem. A classification of these techniques has been proposed: Traditional Techniques and Advanced Techniques. The traditional techniques to solve JSS could not fully satisfy the global competition and rapidly changing …
A Wideband Monopole For Reconfigurable Multiband Radio Terminals, Max Ammann
A Wideband Monopole For Reconfigurable Multiband Radio Terminals, Max Ammann
Conference papers
A wideband planar monopole employing two broadbanding techniques is investigated, and is shown to yield an impedance bandwidth ratio of 10:1 or greater for a return loss of 8 dB. The radiation pattern bandwidth is also investigated
Application Of Digital Image Processing To Marker-Free Analysis Of Human Gait, Jane Courtney, David Burke, Annraoi Depaor
Application Of Digital Image Processing To Marker-Free Analysis Of Human Gait, Jane Courtney, David Burke, Annraoi Depaor
Articles
The standard method of human gait analysis in use in gait laboratories today invariably involves marker-based motion tracking systems. Although somewhat effective, these methods require accurate placement of awkward external markers. We report on an enhanced approach being researched and developed at the National Rehabilitation Hospital, Dublin based on marker-free motion tracking incorporating advanced digital image processing techniques.
Supply Chain Software: An Overview, Ronan Mcdonnell, Edward Sweeney
Supply Chain Software: An Overview, Ronan Mcdonnell, Edward Sweeney
Books/Book chapters
No abstract provided.
Energy Reduction By Enhanced Evaporative Cooling Of Buildings In Martime Climates, Ben Costelloe, Donal Finn
Energy Reduction By Enhanced Evaporative Cooling Of Buildings In Martime Climates, Ben Costelloe, Donal Finn
Conference Papers
Direct cooling of buildings by water evaporation has traditionally been seen as appropriate, only, in dry and arid climates, which experience high levels of wet bulb temperature depression. The technique has generally not been applied in maritime climates where low levels of wet bulb temperature depression are frequently found. However, recent developments in enhancing heat and mass transfer in cooling towers, together with the success of high temperature sensible cooling systems, such as chilled ceiling panels and beams, have prompted a review of the evaporative cooling technique as an effective and low energy means of cooling modern deep plan buildings, …
Sharing Health-Care Records Over The Internet, Jane Grimson, Gaye Stephens, Benjamin Jung, William Grimson, Damon Berry, Sebastien Pardon
Sharing Health-Care Records Over The Internet, Jane Grimson, Gaye Stephens, Benjamin Jung, William Grimson, Damon Berry, Sebastien Pardon
Articles
Presents a novel approach to sharing electronic health-care records that leverages the Internet and the World Wide Web, developed as part of two European Commission-funded projects, Synapses and SynEx. The approach provides an integrated view of patient data from heterogeneous, distributed information systems and presents it to users electronically. Synapses and SynEx illustrate a generic approach in applying Internet technologies for viewing shared records, integrated with existing health computing environments. Prototypes have been validated in a variety of clinical domains and health-care settings
Experimental Investigation Of Performance Of A Single Phase Upqc For Voltage Sensitive And Non-Linear Loads, Malabika Basu, S. P. Das, Gopal K. Dubey
Experimental Investigation Of Performance Of A Single Phase Upqc For Voltage Sensitive And Non-Linear Loads, Malabika Basu, S. P. Das, Gopal K. Dubey
Conference papers
A unified power quality conditioner (UPQC) is proposed in this paper. It protects the consumer at the load end from supply voltage sag, and provides unity power factor condition at the utility for different values of load power factor. A PC-based closed loop control scheme is proposed and experimental investigation is carried out in the laboratory. Selected experimental results are reported along with control circuit and phasor diagram to validate the proposition.
Bicycle Braking System, Noel Brady
Bicycle Braking System, Noel Brady
Patents
A bicycle braking system for permitting controlled rotation and continuous power to the wheels of a bicycle during braking of the bicycle to enhance control of the bicycle during braking includes a cylindrical brake pad that is spring loaded within angled slots in a casing. The brake pad is positioned proximate the rim of a wheel and a cable assembly is coupled to the brake pad for urging the brake pad towards an end of the angled slots and against the rim of the wheel to slow rotation of the wheel.
Preparation Of Magnetic Nanoparticles And Their Assemblies Using A New Fe(Ii) Alkoxide Precursor, Suresh Pillai, Grainne Biddlecombe, Yurii Gun’Ko, John Kelly, J. Michael Coey, Alexis Douvalis
Preparation Of Magnetic Nanoparticles And Their Assemblies Using A New Fe(Ii) Alkoxide Precursor, Suresh Pillai, Grainne Biddlecombe, Yurii Gun’Ko, John Kelly, J. Michael Coey, Alexis Douvalis
Articles
No abstract provided.
Comparison Of Two B-Polynomial Methods: Application To The Identification Of Time Delayed Processes, Ruiyao Gao, Aidan O'Dwyer
Comparison Of Two B-Polynomial Methods: Application To The Identification Of Time Delayed Processes, Ruiyao Gao, Aidan O'Dwyer
Conference papers
An extensive literature exists on the estimation of the model parameters of time delayed processes. The objective of this paper is to review the main B-polynomial approaches to the delay estimation problem. More specifically, two algorithms are discussed and compared theoretically and in simulation. The algorithms involve various procedures to assess how the model relates to the observed data, to a priori knowledge, and to the algorithms’ intended use. Simulation results indicate that both the algorithms can suitably identify the model parameters, including the time delay. This paper also discusses advantages and disadvantages of the methods and gives some guidelines …
Software Quality Strategic Driver Model (Sq-Sdm), Ronan Fitzpatrick
Software Quality Strategic Driver Model (Sq-Sdm), Ronan Fitzpatrick
Other resources
No abstract provided.
Magnetic Nanoparticles And Nanoparticle Assemblies From Metallorganic Precursors, Suresh Pillai, Yurri Gunko, David Mcinerney
Magnetic Nanoparticles And Nanoparticle Assemblies From Metallorganic Precursors, Suresh Pillai, Yurri Gunko, David Mcinerney
Articles
No abstract provided.
The Problem Of A Viscoelastic Cylinder Rolling On A Rigid Half-Space, John Murrough Golden, G.A.C. Graham
The Problem Of A Viscoelastic Cylinder Rolling On A Rigid Half-Space, John Murrough Golden, G.A.C. Graham
Articles
The problem of a viscoelastic cylinder rolling on a rigid base, propelled by a line force acting at its centre, is solved in the noninertial approximation. The method used is based on a decomposition of hereditary integrals developed by the authors in previous work, and on the viscoelastic Kolosov-Muskhelishvili equations which are used to generate a Hilbert problem. In this formulation, the problem reduces to a nonsingular integral equation in space and time, which simplifies under steady-state conditions and for exponential decay materials, to algebraic form. There are also two subsidiary conditions.
In the case of a standard linear model, …
Eddy Structures Induced Within A Wedge By A Honing Circular Arc, C. P. Hills
Eddy Structures Induced Within A Wedge By A Honing Circular Arc, C. P. Hills
Articles
In this paper we outline an expeditious numerical procedure to calculate the Stokes flow in a corner due to the rotation of a scraping circular boundary. The method is also applicable to other wedge geometries. We employ a collocation technique utilising a basis of eddy (similarity) functions introduced by Moffatt (1964) that allows us to satisfy automatically the governing equations for the streamfunction and all the boundary conditions on the surface of the wedge. The circular honing problem thereby becomes one-dimensional requiring only the satisfaction of conditions on the circular boundary. The advantage of using the Moffatt eddy functions as …
Eddies Induced In Cylindrical Containers By A Rotating End Wall, Christopher Hills
Eddies Induced In Cylindrical Containers By A Rotating End Wall, Christopher Hills
Articles
The flow generated in a viscous liquid contained in a cylindrical geometry by a rotating end wall is considered. Recent numerical and experimental work has established several distinct phases of the motion when fluid inertia plays a significant role. The current paper, however, establishes the nature of the flow in the thus far neglected low Reynolds number regime. Explicitly, by employing biorthogonality relations appropriate to the current geometry, it is shown that a sequence of exponentially decaying eddies extends outward from the rotating end wall. The cellular structure is a manifestation of the dominance of complex eigensolutions to the homogeneous …
Strategic Drivers Of Software Quality: Beyond External And Internal Software Quality, Ronan Fitzpatrick
Strategic Drivers Of Software Quality: Beyond External And Internal Software Quality, Ronan Fitzpatrick
Conference papers
Software quality is often considered in terms of the contractual requirements between the supplier and acquirer as described in ISO/IEC 12207 and focuses on software life cycle processes. However, beyond these processes acquirer organisations need to address other issues like complying with new legislation, securing return on investment, and achieving competitive support from their new software investments. Supplier organisations also have issues that they must manage. This paper addresses all of these issues and presents eleven issues, which it calls strategic drivers. Then, using the SOFTWARE QUALITY STAR, builds a new conceptual model where each strategic quality driver is defined …
Pi And Pid Controller Tuning Rule Design For Processes With Delay, To Achieve Constant Gain And Phase Margins For All Values Of Delay, Aidan O'Dwyer
Pi And Pid Controller Tuning Rule Design For Processes With Delay, To Achieve Constant Gain And Phase Margins For All Values Of Delay, Aidan O'Dwyer
Conference papers
This paper will discuss the design of PI and PID controller tuning rules to compensate processes with delay, that are modelled in a number of ways. The rules allow the achievement of constant gain and phase margins as the delay varies.
A Wideband Monopole For Reconfigurable Multiband Radio Terminals, Max Ammann
A Wideband Monopole For Reconfigurable Multiband Radio Terminals, Max Ammann
Conference papers
A wideband planar monopole employing two broadbanding techniques is investigated, and is shown to yield an impedance bandwidth ratio of 10:1 or greater for a return loss of 8 dB. The radiation pattern bandwidth is also investigated
An Atm System Model And Wireless Channel Simulation, Karen Dunne
An Atm System Model And Wireless Channel Simulation, Karen Dunne
Masters
Congestion in the low frequency regions of the electromagnetic spectrum and demand for support of high bandwidth applications has prompted widespread investigations into networking technologies and communications media. Traditional networking technologies such as Ethernet that are not capable of adequately supporting high bandwidth applications (e.g. videoconferencing) are being replaced by high speed, high bandwidth technologies such as Asynchronous Transfer Mode (ATM). In the communications media market, wireless systems are becoming ubiquitous due to their ease of installation and maintenance costs. In this research, the networking technology of interest is ATM. ATM used a cell switching architecture that allows seamless support …
The Design And Performance Of An Evaporative Cooling Test Rig For A Maritime Climate, Ben Costelloe, Donal Finn
The Design And Performance Of An Evaporative Cooling Test Rig For A Maritime Climate, Ben Costelloe, Donal Finn
Conference Papers
Recent developments have prompted a review of the use of cooling tower based evaporative cooling technology as an effective means of cooling modern buildings. Prominent among these developments is the success of high temperature cooling systems such as radiant ceiling panels and chilled beams. At present, however, there is little published literature which gives a quantitative, in depth analysis of the performance or energy efficiency of cooling towers, used in maritime climates, in conjunction with heat exchangers and run at low approach and low wet bulb temperatures throughout the free cooling season. This lack of knowledge has meant that many …