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Current Search:
All of 'Electrical', 'and', 'Computer' and 'Engineering' in all fields;
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Displaying Results 26 - 50 of 298 on page 2 of 12
Marked
Mark
Preliminary Results for a Monocular Marker-Free Gait Measurement System
(2006)
Courtney, Jane; dePaor, Annraoi
Preliminary Results for a Monocular Marker-Free Gait Measurement System
(2006)
Courtney, Jane; dePaor, Annraoi
Abstract:
<p>This paper presents results from a novel monocular marker-free gait measurement system. The system was designed for physical and occupational therapists to monitor the progress of patients through therapy. It is based on a novel human motion capture method derived from model-based tracking. Testing is performed on two monocular, sagittal-view, sample gait videos – one with both the environment and the subject’s appearance and movement restricted and one in a natural environment with unrestricted clothing and motion. Results of the modelling, tracking and analysis stages are presented along with standard gait graphs and parameters.</p>
http://arrow.dit.ie/biodevart/4
Marked
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Thermal Robotic Arm Controlled Spraying via Robotic Arm and Vision System
(2010)
Breen, Dermot, (Thesis)
Thermal Robotic Arm Controlled Spraying via Robotic Arm and Vision System
(2010)
Breen, Dermot, (Thesis)
Abstract:
<p>The Tribology Surface Engineering industry is a worldwide multi billion euro industry with significant health and safety risks. The thermal spraying sector of this industry employs the technique of applying molten surface coating material to a substrate via a thermal spray process which is implemented either by manual spraying or pre-programmed robotic systems. The development of autonomous robotic systems for thermal spraying surface coating would significantly improve production and profitability over pre-programmed systems and improve health and safety over manual spraying. The aim of this research was to investigate and develop through software simulation, physical modelling and testing the development of robotic subsystems that are required to provide autonomous robotic control for the thermal spraying process. Computer based modelling programs were developed to investigate the control strategy identified for the thermal spaying process. The algorithms included fifth o...
http://arrow.dit.ie/engdoc/35
Marked
Mark
A Novel Framework for Radio Resource Management in IEEE 802.11 Wireless LANs
(2005)
Davis, Mark; Raimondi, Tristan
A Novel Framework for Radio Resource Management in IEEE 802.11 Wireless LANs
(2005)
Davis, Mark; Raimondi, Tristan
Abstract:
<p>In this paper we address the need to characterize and quantify resource usage in IEEE 802.11 WLANs in order to support radio resource management. We present a compact and intuitive framework for performance characterization and resource utilization that is based upon the concept of MAC bandwidth components. These MAC bandwidth components are directly related to the transmission rate and serve to quantify the resource requirements associated with accessing the wireless medium. We also introduce a graphical technique for presenting these MAC bandwidth components that illustrates how WLAN stations interact in contending for access to the wireless medium. We demonstrate the usefulness of this framework for radio resource management using a number of computer simulations based upon the emerging IEEE 802.11e QoS standard.</p>
http://arrow.dit.ie/commcon/28
Marked
Mark
An Electrooculogram-based Binary Saccade Sequence Classification (BSSC) Technique for Augmentative Communication and Control
(2009)
Keegan, Johnalan; Burke, Ted; Condron, James
An Electrooculogram-based Binary Saccade Sequence Classification (BSSC) Technique for Augmentative Communication and Control
(2009)
Keegan, Johnalan; Burke, Ted; Condron, James
Abstract:
In the field of assistive technology, the electroocu-logram (EOG) can be used as a channel of communication and the basis of a man-machine interface. For many people with severe motor disabilities, simple actions such as changing the TV channel require assistance. This paper describes a method of detecting saccadic eye movements and the use of a saccade sequence classification algorithm to facilitate communication and control. Saccades are fast eye movements that occurs when a person's gaze jumps from one fixation point to another. The classification is based on pre-defined sequences of saccades, guided by a static visual template (e.g. a page or poster). The template, consisting of a table of symbols each having a clearly identifiable fixation point, is situated within view of the user. To execute a particular command, the user moves his or her gaze through a pre-defined path of eye movements. This results in a well-formed sequence of saccades which are translated into a comma...
http://arrow.dit.ie/teapotcon/3
Marked
Mark
Wideband Printed Monopole Design Using a Genetic Algorithm
(2012)
John, Matthias; Ammann, Max
Wideband Printed Monopole Design Using a Genetic Algorithm
(2012)
John, Matthias; Ammann, Max
Abstract:
<p>A method for the design and optimisation of wide-band printed planar monopoles using a genetic algorithm is presented. This novel technique employs overlapping sub-patches which ensures electrical contact in such constellations where two sub-patches are touching only at the corner, hence re-ducing losses. The method was usd optimisation of wide-band printed planar monopoles using a genetic algorithm is presented. This novel technique employs overlapping sub-patches which ensures electrical contact in such constellations where two sub-patches are touching only at the corner, hence re-ducing losses. The method was used to design a wideband monopole antenna with application in higher cellular, WLAN and UWB. Furthermore, the technique is modified for multi-goal optimisation to achieve multiple bands and reduce the lower edge frequencyed to design a wideband monopole antenna with application in higher cellular, WLAN and UWB. Furthermore, the technique is modified fo...
http://arrow.dit.ie/ahfrcart/25
Marked
Mark
Development of a Quality of Service Framework for Multimedia Streaming Applications
(2010)
Wallace, Stuart, (Thesis)
Development of a Quality of Service Framework for Multimedia Streaming Applications
(2010)
Wallace, Stuart, (Thesis)
Abstract:
<p>By the year 2012, it is expected that the majority of all Internet traffic will be video content. Coupled with this is the increasing availability of Wireless Local Area Networks (WLANs) due to their ease of deployment, flexibility and reducing roll out costs. Unfortunately the contention based access mechanism utilised by IEEE 802.11 WLANs does not suit the non-uniform or bursty bandwidth profile of a video stream which can lead to a reduced quality of service (QoS) being experienced by the end-user. In 2005, the IEEE 802.11e protocol was ratified in an attempt to solve this emerging problem. It provides for an access prioritization mechanism based upon four separate traffic classes or access categories (ACs). Each AC is characterised by a set of access parameters that determine its level of access priority which is turn determines the amount of bandwidth available to it. Computer simulation studies have shown that AC prioritisation can yield significant improvements in th...
http://arrow.dit.ie/engmas/38
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A New Eccentric Geomagnetic Dipole to give the Correct Dip Pole Locations
(2006)
De Paor, Annraoi; Burke, Ted
A New Eccentric Geomagnetic Dipole to give the Correct Dip Pole Locations
(2006)
De Paor, Annraoi; Burke, Ted
Abstract:
<p>In this paper, we describe a new eccentric dipole model of the Earth’s magnetic field. The constraints under which the conventional eccentric dipole model is defined result in predicted dip pole locations that differ significantly from the measured locations. Here, we give a preliminary exposition of a new dipole model which, because it is constrained by the observed dip pole locations, overcomes this problem.</p>
http://arrow.dit.ie/teapotart/3
Marked
Mark
Playing Technique and Violin Timbre:Detecting Bad Playing
(2010)
Charles, Jane, (Thesis)
Playing Technique and Violin Timbre:Detecting Bad Playing
(2010)
Charles, Jane, (Thesis)
Abstract:
<p>For centuries, luthiers have committed to working towards better understanding and improving the sound characteristics and playability of violins. With advances in technology and signal processing, studies attempting to define a violin’s sound quality via physical characteristics and resonance patterns have ensued. Existing work has primarily focused on physical aspects reflecting and instrument’s sound quality. In the music information retrieval domain, advances have been made in areas such as instrument identification tasks. Although much research has been completed on finding suitable features from which musical instruments can be represented, little work has focused on the violin’s complete timbre space and the effect a player has on the sound produced. This thesis specifically focuses on representing violin timbre such that a computer can detect the sound associated with a beginner from that of a professional standard player and detect typical beginner playing faults b...
http://arrow.dit.ie/engdoc/28
Marked
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A New High Power Parallel Converter Scheme for Active Power Filters
(2004)
Basu, Malabika; Das, S. P.; Dubey, Gopal
A New High Power Parallel Converter Scheme for Active Power Filters
(2004)
Basu, Malabika; Das, S. P.; Dubey, Gopal
Abstract:
<p>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 appreciable extent. Also, they have the advantage of low switching frequency and full utilisation of switching devices, which is essential in high-power applications. These advantages have been utilised in parallel combination with a low-power high-frequency current-controlled APF, such that the higher order harmonics can be eliminat...
http://arrow.dit.ie/engscheleart2/1
Marked
Mark
A Fiber Bragg Grating-Based All-Fiber Sensing Systems for Telerobotic Cutting Applications
(2010)
Rajan, Ginu; Callaghan, Dean; Semenova, Yuliya; McGrath, Mark; Coyle, Eugene; Farrell, ...
A Fiber Bragg Grating-Based All-Fiber Sensing Systems for Telerobotic Cutting Applications
(2010)
Rajan, Ginu; Callaghan, Dean; Semenova, Yuliya; McGrath, Mark; Coyle, Eugene; Farrell, Gerald
Abstract:
A fiber Bragg grating (FBG)-based strain sensing system for minimally invasive telerobotic cutting applications is presented in this paper. Investigations assume that a scissor blade can be approximated as a uniformly tapered cantilever beam. A replica of the scissor blade is produced and strain characterization has been carried out using an FBG sensor system. Results are validated against measurements obtained using conventional electrical resistance strain gauges. The scissor blade experiences both direct and lateral forces during cutting, hence the system is characterized for a direct load range of 0-30 N and a lateral load range of 0-10 N. The results show a very good linear response for direct loading and some sensitivity to lateral loading. An actual sensorized scissor blade prototype is also characterized and results compared with that of the replica blade. The FBG interrogation system used was a macro-bend fiber filter-based ratiometric system. The use of FBGs together with ...
http://arrow.dit.ie/engscheceart/57
Marked
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Instability in Self-Pulsation in Laser Diodes and its Effect on All-Optical Synchonization
(1994)
Hyland, Jonathan; Farrell, Gerald
Instability in Self-Pulsation in Laser Diodes and its Effect on All-Optical Synchonization
(1994)
Hyland, Jonathan; Farrell, Gerald
Abstract:
The effect of short- and long-term frequency instability in self pulsation on all-optical synchronization using a twin-section laser diode is experimentally investigated. Short-term frequency instability broadens the unlocked full width at half maximum (FWHM) of the fundamental of the rf spectrum of the self-pulsating laser diode. We show experimentally that the value of the unlocked FWHM, and thus the level of short-term instability, has a direct effect on the optical power required to maintain synchronization. A novel means of reducing the FWHM is presented based on a reflective transmission line stub connected to the absorber of the twin-section self-pulsating laser diode in use. A reduction of up to 5 dB in the average optical power required for effective synchronization is observed. Long-term frequency instability can prevent synchronization from taking place because of the limited lock-in frequency range of a self-pulsating laser diode. It is shown that for the devices used he...
http://arrow.dit.ie/engscheceart/54
Marked
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A Hybrid Fiber Optic Sensing System for Simultaneous Strain and Temperature Measurement and its Application
(2010)
Rajan, Ginu; Milenko, Karolina; Lesiak, Piotr; Semenova, Yuliya; Boczkowska, Anna; Rama...
A Hybrid Fiber Optic Sensing System for Simultaneous Strain and Temperature Measurement and its Application
(2010)
Rajan, Ginu; Milenko, Karolina; Lesiak, Piotr; Semenova, Yuliya; Boczkowska, Anna; Ramakrishnan, Manjusha; Jedrzejewski, Kazimierz; Domanski, Andrzej; Wolinski, Tomasz; Farrell, Gerald
Abstract:
A hybrid fiber optic sensor by integrating polarimetric fiber sensors and fiber Bragg grating sensors for simultaneous strain and temperature measurement is presented in this paper. Two types of polarimetric fiber sensors are used; a Panda fiber and a polarization maintaining photonic crystal fiber. The polarimetric strain sensors give the average strain and temperature information, while the fiber Bragg grating sensors give localized strain information. Two applications of the proposed configuration are also demonstrated in this paper. In the composite materials three fiber sensors are used while for other engineering applications a temperature insensitive polarimetric fiber sensor can be used together with an FBG sensor to measure strain and temperature simultaneously.
http://arrow.dit.ie/engscheceart/55
Marked
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Humidity Sensor Based on a Single-mode Hetero-core Fiber Structure
(2011)
Wu, Qiang; Semenova, Yulia; Mathew, Jinesh; Wang, Pengfei; Farrell, Gerald
Humidity Sensor Based on a Single-mode Hetero-core Fiber Structure
(2011)
Wu, Qiang; Semenova, Yulia; Mathew, Jinesh; Wang, Pengfei; Farrell, Gerald
Abstract:
<p>Using a small-core single-mode fiber (SCSMF), a novel relative humidity (RH) sensor based on an SMF28-SCSMFSMF28 fiber structure was proposed in this paper. By depositing a humidity sensitive material, such as poly (ethylene oxide) (PEO) on the bare SCSMF fiber, the proposed structure can act as an RH sensor with high sensitivity. Experiments demonstrated that the proposed RH sensor with PEO coating can achieve a sensitivity of 430nm per relative humidity unit (RHU) in the RH range from 80% to 83% RH and a sensitivity of 50nm per RHU in the RH range from 83% to 95% RH.</p>
http://arrow.dit.ie/engscheceart/101
Marked
Mark
Estimating the Yield of Micro Wind Turbines in an Urban Environment: A Methodology
(2010)
Sunderland, Keith; Conlon, Michael
Estimating the Yield of Micro Wind Turbines in an Urban Environment: A Methodology
(2010)
Sunderland, Keith; Conlon, Michael
Abstract:
<p><strong>Micro wind turbines currently have the majority share of micro (electricity) generation installations in Ireland. These technologies are being installed predominantly in rural environments, and current applications to the <em>Distribution Services Operator</em> (DSO) for connection of all types of micro generator stand at less than 500. Poor market dissemination of information and research findings compounded with poor options for spill payment - as well as onerous planning restrictions do not –it appears - create a platform conducive to encouraging development in this market.</strong></p> <p><strong> This paper outlines the complexities associated with evaluating the wind resource within an urban environment and investigates the means to ‘estimate’ wind regimes in an urban environment based on an extrapolation of a reference wind speed from a rural environment into the urban area. Methodologies for estimating the wind speed...
http://arrow.dit.ie/engscheleart/171
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The Role of Micro Wind Generation in Ireland’s Energy Future
(2012)
Sunderland, Keith; Conlon, Michael
The Role of Micro Wind Generation in Ireland’s Energy Future
(2012)
Sunderland, Keith; Conlon, Michael
Abstract:
<p>This paper defines the current position for micro-generation, with particular reference to the potential for micro-wind units, in the Irish electricity supply system. A network model is developed using the <em>Distflow</em> method of load flow analysis and is applied to consider the appropriate level of micro-generation penetration.</p>
http://arrow.dit.ie/engscheleart/173
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A Java Tool for Exploring State Estimation using the Kalman Filter
(2004)
Delaney, Declan; Ward, Tomas
A Java Tool for Exploring State Estimation using the Kalman Filter
(2004)
Delaney, Declan; Ward, Tomas
Abstract:
This paper describes a novel software application that assists in understanding the process of estimating the state of a linear dynamic system based on noisy output signal measurements. An interactive Java tool, based on the Kalman Filter, is described. This consists of two main parts, a simple one-dimensional filter and a multi-dimensional filter tool. The user can set all input parameters through a single interface or by following a series of guided steps. Raw measurement data can be generated automatically or inserted manually by the user and the results of estimating the true system state are then presented as a series of graphs in real-time. The application is described through the use of two simple examples. Such an application could be used to teach signal and systems engineering.
http://eprints.nuim.ie/201/
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The development of electromechanical batteries for power system support and for sthort-term standby power
(1997)
O'Leary, Michael Peter, (Thesis)
The development of electromechanical batteries for power system support and for sthort-term standby power
(1997)
O'Leary, Michael Peter, (Thesis)
Abstract:
<p>The slow move from a fossil-fuel powered society to a renewable-energy powered society is creating and will continue to create a demand for good energy storage techniques. The electromechanical battery (EMB), comprising a flywheel energy storage system with electrical input and output, is one of the many candidate technologies. Two different EMB types are evaluated in this present project. The first is a ring (or annular) flywheel to be constructed using fibre composite materials and to rotate at high speed in a vacuum. Energy is to be imported and exported electromagnetically based on linear electrical machine principles. Confinement of the annulus is to be performed electrodynamically using superconductors. The basic mechanical and electr4omagnetic considerations are summarised and the prospects of this composite annular flywheel are considered for different applications. The second EMB evaluated is a more conventional system and is aimed at the standby power supply marke...
http://arrow.dit.ie/engmas/14
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An electro-oculogram based system for communication and control using target position variation
(2005)
Fitzmaurice, Ronan; Burke, Ted; De Paor, Annraoi
An electro-oculogram based system for communication and control using target position variation
(2005)
Fitzmaurice, Ronan; Burke, Ted; De Paor, Annraoi
Abstract:
In this paper we describe a novel mode of human computer interaction based on gaze tracking using the electro-oculogram (EOG). Despite the relative simplicity of recording this signal, it is often discounted as a reliable method of gaze tracking because of problems arising from changing sensitivity and DC drift. We describe an original technique, Target Position Variation (TPV), which addresses this issue by presenting moving icons which, when followed with the eye, create a corresponding pattern in the EOG signal which can be used to infer the correct gaze position and to compensate for variations in sensitivity.
http://arrow.dit.ie/teapotcon/8
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An Investigation of the use of a High Resolution ADC as a Digital Biopotential Amplifier
(2011)
Berry, Damon; Duignan, Frank; Hayes, Richard
An Investigation of the use of a High Resolution ADC as a Digital Biopotential Amplifier
(2011)
Berry, Damon; Duignan, Frank; Hayes, Richard
Abstract:
Sigma delta analogue to digital converters have been used in many signal processing applications including some commercially available systems for sampling of bio-signals Bio-potential amplifiers have traditionally utilised specialised highquality analogue components to amplify bio-signals. The central aim of this work is to investigate the benefits of using high-resolution sigma delta conversion as a digital amplification stage in the signal path of a bio-potential amplifier. A number of system arrangements specific to bio-potential measurement are presented and discussed. These arrangements are designed to use the high resolution capacity of the sigma delta converter in different ways, providing different benefits. To explore these benefits, the authors have implemented a digital bio-potential signal capture system consisting of a sigma delta converter interfaced to a PC running MATLAB via an inexpensive microcontroller and to test it with a number of test signals. A signal gener...
http://arrow.dit.ie/teapotcon/22
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A mobile ECG monitoring system with context collection
(2009)
Li, Jin Peng; Berry, Damon; Hayes, Richard
A mobile ECG monitoring system with context collection
(2009)
Li, Jin Peng; Berry, Damon; Hayes, Richard
Abstract:
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 for clinicians and so improve clinical decision making. As a first step towards a mobile cardiac wellness guideline system, the authors present a system which can receive bio-signals that are wirelessly streamed across a body area network from Bluetooth enabled electrocardiographs. The system can store signals ...
http://arrow.dit.ie/teapotcon/24
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Modelling and Analysis of the Effect of Noise on an Edge Filter Based Ratiometric Wavelength Measurement System
(2008)
Rajan, G.; Semenova, Y.; Freir, T.; Wang, P.; Farrell, Gerald
Modelling and Analysis of the Effect of Noise on an Edge Filter Based Ratiometric Wavelength Measurement System
(2008)
Rajan, G.; Semenova, Y.; Freir, T.; Wang, P.; Farrell, Gerald
Abstract:
<p>Theoretical modeling, analysis, and experimental investigation of effect of noise on an edge filter based ratiometric wavelength measurement system have been carried out. A basic noise model for a ratiometric wavelength measurement system which considers both optical and electrical noise is presented. The ratio response of the system has been theoretically modeled considering the limited signal-to-noise ratio (SNR) of source and noise of the receiver circuit and experimentally verified using a macrobend fiber edge filter based ratiometric system. It is shown both theoretically and experimentally that increasing the slope of the edge filter is not necessarily an efficient solution to increasing the resolution of the system and the effect of noise must be accounted for. The resolution of the system changes with wavelength, and an optimization of slope of the ratio of the system is necessary to determine the best possible resolution for a wider wavelength range. In the demonst...
http://arrow.dit.ie/engscheceart/11
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Adequacy assessment of the Irish generation system including wind capacity
(2005)
Carr, William, (Thesis)
Adequacy assessment of the Irish generation system including wind capacity
(2005)
Carr, William, (Thesis)
Abstract:
<p>Adequacy assessment of generation capacity is a statistical measure of the ability of existing or planned generation plant to meet predicted levels of electrical demand. Complications arise in this calculation because at any point in time the exact level of capacity available is variable due to planned and forced outages. Planned outrages is a term used to describe the period during the year when a generation unit is required to be shut down for maintenance work to be carried out. The duration of this outrage is normally known and its timing can be chosen. Forced outages describe the random failure that can occur that lead to a unit being shut down for repair. Due to the random nature of forced outages, regardless of the level of capacity in a system, 100% reliability cannot be guaranteed. The goal of this work is to investigate generation adequacy assessment in an Irish context. In this thesis the literature review in the area that was undertaken is outlined. Details of ho...
http://arrow.dit.ie/engmas/25
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Augmented control of hands free voice prostheses
(2008)
Madden, Brian; Condron, James; Burke, Ted; Coyle, Eugene
Augmented control of hands free voice prostheses
(2008)
Madden, Brian; Condron, James; Burke, Ted; Coyle, Eugene
Abstract:
Laryngectomy patients often use an electrolarynx to facilitate speech following a tracheotomy. Devices of this type provide the most intelligible means of communication for tracheotomy patients. However, the electro-larynx has inherent drawbacks such as the buzzing monotonic sound emitted, the need for a free hand to operate the device, and the difficulty experienced by many tracheotomy patients in adapting to use it. The most effective means of addressing the shortcomings of existing electro-larynges is to provide the user with a hands-free facility. This allows the user to perform other manual tasks whilst speaking, or simply to communicate more effectively through body language. Hands-free devices do exist but require a considerable amount of patient training as they involve the use of the shoulder muscles to control pitch. Furthermore, they are not suitable for all patients as the hands-free is suitable only for users with a certain type of tracheotomy. Goldstein et al in 2004 [...
http://arrow.dit.ie/teapotcon/1
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Mechancial Characterization of Unplasticised Polyvinylchloride Thick Pipes Using Electronic Speckle Pattern Interferometry
(2004)
Mihaylova, Emilia; Potelon, Benjamin; Reddy, Shridhar; Toal, Vincent; Smith, Ciaran
Mechancial Characterization of Unplasticised Polyvinylchloride Thick Pipes Using Electronic Speckle Pattern Interferometry
(2004)
Mihaylova, Emilia; Potelon, Benjamin; Reddy, Shridhar; Toal, Vincent; Smith, Ciaran
Abstract:
<p>In this work a number of techniques (electronic speckle pattern interferometry, holographic interferometry, strain gauge and finite element method) are brought to bear in order to establish consistency in the results of strain measurement. This is necessary if optical nondestructive testing methods, such as those used here, are to gain acceptance for routine industrial use. The FE model provides a useful check. Furthermore, ESPI fringe data facilitates the extension of FE models, an approach that is of growing importance in component testing. The use of in-plane and out-of-plane sensitive electronic speckle pattern interferometry (ESPI) for non-destructive material characterization of thick unplasticised polyvinylchloride (uPVC) pipes is presented. A test rig has been designed for stressing pipes by internal pressure. ESPI gives a complete mapping of the displacement field over the area imaged by the video camera. The results for the strain of uPVC obtained from ESPI data a...
http://arrow.dit.ie/cieoart/68
Marked
Mark
Examining User Performance in the presence of Latency and Jitter in Distributed Interactive Applications
(2004)
Delaney, Declan; Meenaghan, Paul; McLoone, Seamus; Ward, Tomas
Examining User Performance in the presence of Latency and Jitter in Distributed Interactive Applications
(2004)
Delaney, Declan; Meenaghan, Paul; McLoone, Seamus; Ward, Tomas
Abstract:
Latency and jitter inherently limit the maintenance of consistency in Distributed Interactive Applications such as computer games, distributed whiteboards and real-time, collaborative environments. Although there has been much research into methods for maintaining consistency, there is a distinct lack of research exploring the connection between latency, jitter and the end user experience in Distributed Interactive Applications. We have developed an application that allows us to conduct trials under controlled latency and jitter conditions. This provides data, which can be analysed to characterise how people adapt to various degrees of latency and jitter. We present results that highlight how an increase in latency and jitter affect the end-user experience, thus confirming the need for techniques to combat latency and jitter in Distributed Interactive Applications. We alsoe note that the effects of jitter are significantly greater than those of latency.
http://eprints.nuim.ie/200/
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