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Articles 1 - 6 of 6
Full-Text Articles in Physical Sciences and Mathematics
Evaluation Of Human Gait Through Observing Body Movements, Amir S. Hesami, Fazel Naghdy, David A. Stirling, Harold C. Hill
Evaluation Of Human Gait Through Observing Body Movements, Amir S. Hesami, Fazel Naghdy, David A. Stirling, Harold C. Hill
Faculty of Informatics - Papers (Archive)
A new modelling and classification approach for human gait evaluation is proposed. The body movements are obtained using a sensor suit recording inertial signals that are subsequently modelled on a humanoid frame with 23 degrees of freedom (DOF). Measured signals include position, velocity, acceleration, orientation, angular velocity and angular acceleration. Using the features extracted from the sensory signals, a system with induced symbolic classification models, such as decision trees or rule sets, based on a range of several concurrent features has been used to classify deviations from normal gait. It is anticipated that this approach will enable the evaluation of …
Output Quality Evaluation Of Photovoltaic Systems With Different Current Control Methods Of Switch-Mode Converters, K. N. Hasan, Md Enamul Haque, Michael Negnevitsky, Kashem Muttaqi
Output Quality Evaluation Of Photovoltaic Systems With Different Current Control Methods Of Switch-Mode Converters, K. N. Hasan, Md Enamul Haque, Michael Negnevitsky, Kashem Muttaqi
Faculty of Informatics - Papers (Archive)
This paper presents a comparative assessment of the current control methods (CCM) of switch-mode converters for photovoltaic (PV) applications. In this paper, average current control, current programmed control, hysteresis current control and nonlinear carrier control methods are addressed considering input fluctuations and load variations for PV systems. Dynamic responses of PV systems are investigated and harmonic analysis is performed. Performances of the above current controllers are examined through simulation and the results are presented. The results show that the selection of different current control techniques depends on the working conditions and the area of applications.
Development And Performance Evaluation Of A Flexible, Low Cost Manet, Mehran Abolhasan, Brett Hagelstein, Jerry Chun-Ping Wang, D. Franklin, Farzad Safaei, Tadeusz A. Wysocki
Development And Performance Evaluation Of A Flexible, Low Cost Manet, Mehran Abolhasan, Brett Hagelstein, Jerry Chun-Ping Wang, D. Franklin, Farzad Safaei, Tadeusz A. Wysocki
Faculty of Informatics - Papers (Archive)
Performance evaluations of multi-hop ad hoc network routing protocols have been primarily conducted through analytic and simulation-based studies, which frequently fail to accurately predict real-world performance and behaviour. One reason for this is the challenge in developing low cost, representative test beds with the degree of flexibility and mobility required. We have developed a Portable Wireless Ad hoc Node (PWAN) device which establishes multi-hop routes using the OLSR routing protocol. The PWAN’s performance has been investigated using two test bed configurations to evaluate its capacity under conditions of high node density in a short-range, multi-hop environment. Our results illustrate that …
Performance Evaluation Of Ethanol Production Through Continuous Fermentation, Harvinder S. Sidhu, John M. Kavanagh, Simon D. Watt, Mark I. Nelson
Performance Evaluation Of Ethanol Production Through Continuous Fermentation, Harvinder S. Sidhu, John M. Kavanagh, Simon D. Watt, Mark I. Nelson
Faculty of Informatics - Papers (Archive)
We investigate the production of ethanol through continuous fermentation using Saccharomyces cerevisiae in a single reactor and cascades of two or three reactors. We use path following methods to investigate how the ethanol yield varies with the residence time in each reactor configuration of the cascade. Yields currently obtained in industry using yeast are approximately 0.48. We find reactor designs where the product yield approaches the stoichiometric limit of 0.51. We also estimate the financial benefits that can be achieved in typical US ethanol plants through increasing the product yield from 0.48 to 0.51.
Evaluation Of A Low Cost Wireless Chemical Sensor Network For Environmental Monitoring, Jer Hayes, Stephen Beirne, King-Tong Lau, Dermot Diamond
Evaluation Of A Low Cost Wireless Chemical Sensor Network For Environmental Monitoring, Jer Hayes, Stephen Beirne, King-Tong Lau, Dermot Diamond
Faculty of Science - Papers (Archive)
We present work on the development and testing of a low-cost wireless chemical sensor network (WCSN) for monitoring irritant/toxic gases in the environment. The WCSN used in this work takes advantage of recent advances in low power wireless communication platforms and uses colorimetric sensors to detect the presence of certain target gases. This sensor network adopts a star configuration and performs one way RF communications from individual sensor nodes to the base-station. Each node in the network is composed of a multiple sensor platform that measures light intensity, temperature and motion. The light sensor was used as the chemical sensing …
Evaluation Of Tropospheric And Stratospheric Ozone Trends Over Western Europe From Ground-Based Ftir Network Observations, C Vigouroux, M De Maziere, P Demoulin, C Servais, F Hase, T Blumenstock, I Kramer, M Schneider, J Mellqvist, A Strandberg, Voltaire A. Velazco, J Notholt, R Sussmann, W Stremme, A Rockmann, T Gardiner, M Coleman, P Woods
Evaluation Of Tropospheric And Stratospheric Ozone Trends Over Western Europe From Ground-Based Ftir Network Observations, C Vigouroux, M De Maziere, P Demoulin, C Servais, F Hase, T Blumenstock, I Kramer, M Schneider, J Mellqvist, A Strandberg, Voltaire A. Velazco, J Notholt, R Sussmann, W Stremme, A Rockmann, T Gardiner, M Coleman, P Woods
Faculty of Science - Papers (Archive)
Within the European project UFTIR (Time series of Upper Free Troposphere observations from an European ground-based FTIR network), six ground-based stations in Western Europe, from 79° N to 28° N, all equipped with Fourier Transform infrared (FTIR) instruments and part of the Network for the Detection of Atmospheric Composition Change (NDACC), have joined their efforts to evaluate the trends of several direct and indirect greenhouse gases over the period 1995–2004. The retrievals of CO, CH4, C2H6, N2O, CHClF2, and O3 have been optimized. Using the optimal estimation method, some …