POSTER PRESENTER TITLE OF POSTER NUMBER 1 2 3...

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Index

POSTER NUMBER

PRESENTER TITLE OF POSTER

1 Abdulaziz Almutairi

Identification of Coherent Generators using PCA and Cluster Analysis

2 Stylianos Hirodontis

Intelligent Load Shedding for Active Distribution Network Islanding Operation

3 Chui Ten

Control for Synchronous Multiple Distributed Generators Island

4 Graham Bruce DC inclined-plane testing of silicone rubber formulations

5 Kostas Kopsidas

Increasing power transmission through existing overhead Line systems

6 Elizabeth Da Silva

In-Service Surface Degradation of MV Composite Insulators under Severe Environmental Conditions and Low Electric Stress

7 Guy Newman

Characterisation of the output Virtual Power Plants

8 Jhan Yhee Chan

Methodology for Assessment of Financial Losses due to Voltage Sags and Short Interruptions

9 Vidyadhar Peesapati

Lightning Protection of Wind Turbines

10 Jei Dai

Moisture and Aging Effect on the Creepage Discharge Characteristics at the Oil/Transformer-board Interface under Divergent Field

11 Taufiq Mohd Ishak

Sensitivity of transformer’s hotspot temperature and equivalent ageing to selected parameters

12 Yiqun Zou

Convexity Conditions for System Identification using Maximum Likelihood Estimates

13 Caleb Rascon Recovering Displaced Components with Independent Component Analysis and Swarm Intelligence

14 Zakwan Skaf

Applying an output feedback control to a simulated nuclear reactor

15 Haisheng Lin

Control of Batch Product Quality Using Different methods

16 Fei He

Parameter estimation and experimental design for signaling pathway modeling.

17 Syed Talha Ahsan

Digital implementation of functional EIT of evoked responses

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18 Rebecca

Robinson A Study of Composite Electrode-Tissue Impedance

19 Ni Zhu

An Internet Based System For Real-time Wearable DSP Of Human Life Functions

20 Halleh Mortazavi

Underwater Image Enhancement by Optical Back-scatter Compensation

21 Bachir Dekdouk

Application of the impedance method for computing the current density inside a 3D conductor for low conductivity Magnetic Induction Tomography

22 Zareen Mehboob

Decoding Populational Neuronal Responses Using Computational Methods

23 Ivan Marin-Franch

Information available and retrieved in colour images of natural scenes under changes in the illumination spectra

24 Andreas Kafaratzis

Tunable Filter using Right/Left-Handed Transmission Lines

25 Mahmoud Abdalla

Novel Ferrite Left Handed Circuits

26 Mohamad Noh Badaruzzaman

An Automated Microwave Waveguide Measurement Technique

27 Junaid Zafar

Analysis of High Power Ferrite Phase Shifter Operating Above Ferrimagnetic Resonance

28 Hassan Khan

Heterojunction phototransistors for high speed optical detection

29 Jimmy Tan Small-Signal Characterization of pHEMTs in Multilayer CPW MMIC Technology using IC-CAP

30 Jiaping Lu

De-embedding analysis and characterization of CPW multilayer transmission lines

31 Umar Khalid

Resource Allocation for Multi-band Single Carrier FDMA

32 Sarmad Sohaib

Asynchronous Polarized Cooperative MIMO Communication

33 Laith Rashid

Impact Modelling of Wind Farms on Marine Navigational Radar

34 Chris Masouros

Dynamic Code Allocation for Constructive Interference Exploitation in DS-CDMA Systems

35 Leboli Thamae

Multiport Dielectric Resonator Antennas for MIMO Applications

36 Mohamed Soliman

Buried Object Location Based on Frequency Domain UWB Measurements

37 Tauqueer Tauseef

Low Power GHz Class ADC for Wide-Band Communication Systems

38 Shahzad Arshad

Modelling Kink Effect in InA1As/InGaAs pHEMTs using 2D Physical Device Simulator

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39 David Barr

Biologically Plausible Topographic Neural Network Simulation on Fine-Grain Processing Systems

40 Beung Yea Optical Studies of InGaN quantum dots

41 Vesel Haxha

The Use of Improved Kinetic Models of Segregation for Semiconductor Alloys

42 Dan James Electrical Characterisation of Specific-Sized Quantum Dots

43 Iain Crowe

PL Studies of Erbium and Phosphorus Doped SiOx:nc-Si

44 Tingting Wen

Control in TCP over Wireless Network

45 Oskar Vivero

On Maximum Likelihood Estimation Methods for Dynamical Systems with 1/f Spectra

46 Xin Li

Characterization of Carbon Fibre Reinforced Composite by Means of Non-Destructive Eddy Current Testing and FEM Modeling

47 Xiao Hu An Impedence-analysis-based multi-channel imaging system and its applications

48 Swee Peng Ang

Power Transformer Ferroresonance Suppression by Shunt Reactor Switching

49 Prabath Binduhewa

Standard Microsource Interface for a Microgrid

50 Kevin James Dyke

Fuel Cell Interfacing for Distributed Generation

51 Shaofan Qi

Piezoelectric Energy Harvesting Device

52 Ali Milad Jarushi

Study of Energy Source combinations for hybrid vehicle

53 Stephen Woolaghan

Current Source Convertors for Vehicular Applications

54 Paul Tuohy

Rim Driven Marine Thrusters

55 Naayagi Ramasamy

Bidirectional DC-DC Converter for Aircraft Energy Storage Systems

56 Fayez Al-rifai

Enhancing the Performance of Sensorless Permanent Magnet Drives by Measured Torque Feedback

57 Tom Clark

A High Power Impedance Measurement System

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1. Abdulaziz Almutairi [email protected] Identification of Coherent Generators using PCA and Cluster Analysis Coherency identification is an important tool used for model reduction, by dynamic equivalencing, and decomposition of network for more efficient monitoring and control. In this research, the method of coherency identification using Principal Component Analysis (PCA) is supplemented by cluster analysis to overcome its drawbacks and limitations. The proposed combined method is illustrated on a highly meshed network and its features are addressed. 2. Stylianos Hirodontis [email protected] Intelligent Load Shedding for Active Distribution Network Islanding Operation In this 21st century, electric power engineering goes green and intelligent. Green means that power generation development has to be environment friendly, such as wind power, solar power, fuel cell, etc. Intelligent means agents, self-organizing, and automated reasoning and control. The main objective of the project is to investigate and develop techniques, models and multi-agents algorithms for fast coordination of load shedding strategies with constrain of minimum communications requirements. This will allow distribution network self healing operation in an event of fault in the network. 3. Chui Ten [email protected] Control for Synchronous Multiple Distributed Generators Island This research investigates phase control in a multiple distributed generators island with significant generation from a fixed-speed wind farm. The stability of the phase control algorithm under these circumstances is evaluated, including the effect of the power oscillations due to inclusion of fixed-speed wind turbines. Results show that phase control can indeed be achieved, but there are limits on the penetration of fixed-speed wind energy in the synchronous island and on the maximum load disturbance that can occur while remaining within an acceptable phase difference.

mailto:[email protected]



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4. Graham Bruce [email protected] DC inclined-plane testing of silicone rubber formulations The inclined plane test for tracking and erosion resistance of materials, IEC-60587, has become a routine tool for researchers developing high voltage outdoor insulation materials. The test is designed for ac applications and many laboratories have many years of experience with the technique. DC power systems are becoming more important and competitive in the market place. Often insulation systems designed for ac applications are utilised on dc systems. However, there is clear evidence of behavioural differences between identical materials under ac and dc stresses. An equivalent test to IEC-60587, has been developed and utilised for the dc case. A computer-based monitoring system is used to study materials beyond the criteria set by IEC 60587 and this system is reviewed in the paper. A number of different formulations of silicone rubber have been evaluated using the rig described. In this paper particular attention is given to the nature of electrical discharges under different test conditions and how this influences material degradation. Measurements show that the sample degradation mechanism is very different for positive and negative HVDC, while positive DC has shown to be the most aggressive for the materials tested.

5. Kostas Kopsidas

[email protected] Increasing power transmission through existing overhead Line systems Methods of improvement in the power transfer capacity of existing Overhead Power Lines that only require small modifications of the structure, and thereby keep the cost and permission requirements at low levels, are illustrated. In particular, an investigation of the benefit that the potential use of advanced composite conductors on overhead lines can offer, when compared with all aluminium alloy conductor (AAAC) or aluminium conductor steel reinforced (ACSR) wires, is presented.

6. Elizabeth Da Silva:

[email protected] In-Service Surface Degradation of MV Composite Insulators under Severe Environmental Conditions and Low Electric Stress Ethylene propylene diene monomer (EPDM) tension insulators, rated for 15 kV, have been recovered after approximately seven years in service. The samples were recovered from three different 11 kV systems all of which were located less than 3 km from the coast. Some differences have been identified between their environmental conditions, of which azimuth appears to be the most significant. Four characteristic regions are identified by orientation and physical appearance. The maximum local values of electric field have been determined using FEM, and were found to be 3.5 kV/m or 35 kV/m, depending on the circuit, which is a low intensity of electrical stress. High roughness and complete loss of hydrophobicity are readily observed consequences of ageing of the material surfaces. Electrical and physicochemical tests have been carried out to identify the changes to polymer properties, and the resulting impact on insulator performance. A small degree of recovery of hydrophobicity was observed after a few months out of service in some cases. Corrosion was found on end fittings of one of the evaluated circuits.




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7. Guy Newman

[email protected] Characterisation of the output Virtual Power Plants The use of small-scale generation based on disparate new and renewable technologies is becoming more prevalent due to the imperative to reduce green house gas emissions that are thought to be the chief cause of climate change. As penetration of these distributed elements increases, displacing central generation, there is growing need to understand the composite behaviour of groups of Distributed Generation (DG) devices, also known as Virtual Power Plants (VPPs). The work focuses on three disparate weather dependant technologies: Wind turbines, Photovoltaic (PV) arrays, and micro Combined Heat and Power (μCHP) generators, taking them from stand-alone units and combining them into the VPP, producing a probabilistic output of power from the VPP.

8. Jhan Yhee Chan

[email protected] Methodology for Assessment of Financial Losses due to Voltage Sags and Short Interruptions This paper proposes a comprehensive methodology to estimate the financial losses incurred by voltage sags and short interruptions to industrial plants. The proposed methodology uses various techniques to tackle different levels of failure risk assessment. Failure risks of sensitive industrial equipments, sub-processes and processes are assessed in sequence before the failure risk and financial losses of an industrial plant are estimated. The most important part of the methodology involves failure risk assessment of sensitive equipments, where a fuzzy logic based model is built to address the inherent uncertainties in equipment behaviour when subjected to voltage sags and short interruptions. By considering more risk affecting factors, the proposed methodology promises improved accuracy and practicability.

9. Vidyadhar Peesapati

[email protected] Lightning Protection of Wind Turbines Lightning is an atmospheric phenomenon which causes damage to anything it strikes. This project deals with the protection of large wind turbines (especially offshore) from lightning. Lightning data analysis performed in this project help in understanding the change in lightning frequency due to the introduction of large wind farms. 3D modelling is used to identify vulnerable parts of the turbine in case of a thunderstorm. The introduction of Radar absorbing materials to minimize radar cross section of wind turbines might affect the efficiency of the lightning protection system, these affects are to be evaluated in detail.




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10. Jei Dai

[email protected] Moisture and Aging Effect on the Creepage Discharge Characteristics at the Oil/Transformer-board Interface under Divergent Field The creepage discharge on pressboard barriers is regarded as one of the failure modes for power transformers. In literature, extensive research has been carried out previously to investigate the nature of creepage discharges, while little work was done to study the creepage discharge on the aged transformer board. A literature survey will be given first to summarise the understanding of creepage discharges on cellulose/oil interfaces. The effects of the aging products like moisture and absorbed sediments on the characteristics of creepage discharges will be investigated. 11. Mohd Ishak (Taufiq) [email protected] Sensitivity of transformer’s hotspot temperature and equivalent ageing to selected parameters In 2005, IEC released a revised Transformer Loading Guide which introduces an alternative mathematical model of the winding hotspot temperature. These new equations involve empirical exponent variables that account for properties of the transformer. This paper investigates sensitivity of hotspot temperature and equivalent ageing with respect to the load and hotspot factor. The study also includes the real situation with cooler control set at 2 different temperatures. The effect of cooler control to the hotspot and equivalent ageing is also being investigated. 12. Yiqun Zou [email protected] Convexity Conditions for System Identification using Maximum Likelihood Estimates Maximum likelihood estimation (MLE) has been tremendously implemented in both open and closed loop identification. However the possible convergence to local minima is one main disadvantage in the estimation. To effectively avoid the problem, we present various feasible conditions which guarantee a convex landscape of estimation loss functions for different parametric models, e.g. Output-Error, ARMAX, Box-Jenkins etc. Then in optimization, global minima will be the only solutions provided by gradient based algorithms.




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13. Caleb Rascon [email protected] Recovering Displaced Components with Independent Component Analysis and Swarm Intelligence Independent Component Analysis (ICA) has begun to be used as a mean of extracting underlying components of spectral measurements. However, sensor de-calibration and external influences can affect the energy- frequency proportion in such measurements, which generally come about as frequency displacement. It is shown how fragile ICA is towards displaced measurements, and how using Swarm Intelligence can aid at extracting good estimates of components from displaced data. 14. Zakwan Skaf [email protected] Applying an output feedback control to a simulated nuclear reactor In this paper an output regulation design of nonlinear system is applied to solve a tracking problem for a simulated nuclear reactor. A nonlinear observer for state estimation of a nonlinear nuclear reactor system is designed using a Lyapunov function. A nuclear reactor power controller is then designed by using the output feedback using the observed state. Simulations are provided to show the efficiency of the proposed controller with estimated state feedback from the proposed observer. 15. Haisheng Lin [email protected] Control of Batch Product Quality Using Different methods NIR spectra of product give information not only on the surface properties of the sample but also on the bulk composition, and they reflect the quality of the product. It is very important to control the batch product quality by controlling the NIR spectra of product. Different control methods including controlling one peak intensity trajectory of NIR spectra, controlling the score trajectory produced by principal component analysis (PCA) of NIR spectra and controlling the weight trajectory produced by independent component analysis (ICA) of NIR spectra were used.




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16. Fei He [email protected] Parameter estimation and experimental design for signaling pathway modeling An important aspect of systems biology research is the so-called " reverse engineering" . This allows researchers to estimate and validate both pathway' s structure and kinetic constants. The statistical property of a sort of semi-parametric estimation methods, the " collocation" method, is explicitly analyzed. To overcome the general lack of data for pathway model identification, experimental design for signaling pathway modeling is also investigated. When taking account of parametric uncertainty, a mini-maxrobust experimental design method is proposed 17. Syed Ahsan [email protected] Digital implementation of functional EIT of evoked responses The 32-electrode fEITER (functional EIT of evoked responses) system currently under development is targeting to monitor the brain function on the sub-second time-scale, which has got great promise for clinical and research applications. The work presented here is on the digital implementation of this system, which includes the development of efficient firmware for Xilinx FPGA and CPLD. The FPGA firmware also includes a module to monitor, for safety reasons, the injected current and shut the current supply off if safety limits are crossed. 18. Rebecca Robinson [email protected] A Study of Composite Electrode-Tissue Impedance The limitation of non-destructive methods for the inspection of carbon fibre reinforced plastic (CFRP) composites is a major problem for many practical applications of the material, especially in the aircraft industry. With eddy current methods, the inductive probes can used to inspect CFRP for structure characterization, defects detection and performance monitor effectively. And, 3D finite element method (FEM) computer simulations have also been developed to demonstrate the coupling of the probes and samples, and to support the experimental method.




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19. Ni Zhu [email protected] An Internet Based System For Real-time Wearable DSP Of Human Life Functions A novel human life functions system is designed for patients ranging from the elderly to athletes. Signals of patient’s body are obtained from electrodes which are integrated into a vest, amplified and digitally processed. The processed signals are transmitted to the internet over stand alone hardware under appropriate network protocols. A wireless solution enables freedom of patient’s act, still under monitoring. It is intended that the signals from the patients could be remotely analysed via the internet. The integrated system would be wearable and portable in the internet connected environments. The ultimate aim of the research is to embed the human life functions into the internet based real-time DSP system. 20. Halleh Mortazavi [email protected] Underwater Image Enhancement by Optical Back-scatter Compensation Underwater images are often degraded because of the effect of back-scattered light and extinction. The back-scattered light is the light reflected from suspended particles in the water between the object and the camera. Extinction is the loss of light when it travels from an object towards the camera. Both scattering and absorption contribute to extinction. There are different approaches to mitigate the effect of back-scattered light, such as polarization (Schechner & Karpel 2005) and signal gating (C.S. Tan & He 2005). Both of these methods provide significant improvement in image contrast. However, these methods require special equipment which is expensive and also restricts general application. The proposed method is to find an image processing technique that could be applied only to an image post-acquisition, by software processing. Initial results suggest that accurate image recovery is possible using conventional camera and lighting arrangements. The accuracy and colour fidelity of the proposed method is investigated by analysing test images which are captured in RGB and multispectral format. The test images are taken in a controlled environment which represents the underwater condition in both clear water (as a reference) and in presence of suspended particles of different concentrations. 21. Bachir Dekdouk [email protected] Application of the impedance method for computing the current density inside a 3D conductor for low conductivity Magnetic Induction Tomography This paper presents a formulation and the modelling results of an algorithm used to calculate the current density (J) distribution in three dimensional conductors. The solution represents a key part in the implementation of a custom forward model for magnetic induction tomography (MIT) to compute the voltages or trans-impedances as measured by the sensor array. The algorithm discretises the conducting target into a Cartesian grid which is represented by a network of interconnected resistors. Circuit theory analysis employing the branch current method in combination with sparse matrix techniques were used to solve the system. The method is formulated based on simplifying assumptions for the low conductivity case, such as a weak diffusion effect. The results show the method is capable of producing accurate solution with less memory and computation time requirements than a commercial Finite Element simulator. Therefore, for future investigation it is qualified for implementation into non-linear iterative reconstruction techniques.




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22. Zareen Mehboob [email protected] Decoding Populational Neuronal Responses Using Computational Methods Neurons work in complex interconnected communicational networks when responding to a stimulus. Recording and analysing neuronal responses from a population of neurons at different levels such as spiking activities, Local Field Potentials (LFPs) and fMRI, provide opportunities to infer and decode brain functions and dynamics. Use of information theory and computational intelligent methods provide useful approaches to such tasks. The application of mutual information based computational methods can retain the maximal information while extracting latent variables and reducing the size of datasets. A self-organising map based clustering technique has been proposed and successfully applied to decoding multiple spike-trains responses from Rats barrel cortex to whisker vibration. The project will further investigate the approach in LFPs as well as BOLD fMRI signals. The aim is to subjugate the dataset and identify the valiant informative variables. 23. Ivan Marin-Franch [email protected] Information available and retrieved in colour images of natural scenes under changes in the illumination spectra Inferences about the identity of surfaces present in a natural scene are possible from estimates of those surfaces’ spectral reflectance properties. A priori, such estimates are not straightforward as the spectra of the reflected light change with the spectrum of the illumination. The aim of this work was to quantify objectively how much information about reflectance spectra in natural scenes is potentially available to the eye or camera and how much may actually be retrieved. It is shown that most of the information available may in fact be retrieved by the use of simple image processing techniques, suitably tuned to the statistics of the scenes being imaged. 24. Andreas Kafaratzis [email protected] Tunable Filter using Right/Left-Handed Transmission Lines This poster describes the design and simulation results of an X-band tunable bandpass filter based on right/left-handed (RH/LH) transmission lines (TL) and varactor diodes. Due to the independent control of the cut-off frequency of each line, the filter exhibits tunable centre frequency and/or absolute bandwidth. The centre frequency can be tuned from 8.9 to 12.2 GHz.




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25. Mahmoud Abdalla [email protected] Novel Ferrite Left Handed Circuits In the past few years, there has been a renewed interest in using structures to develop materials that mimic known material responses or that qualitatively have new response functions that do not occur in nature. These new materials are called ‘metamaterials’. This poster is to introduce some characteristics of ferrite left handed metamaterials for RF microwave applications. These comprise quarter wave length impedance transformers, zeroth order resonator, different types of coupled line couplers, and thee- port circulator. All the proposed microwave LH components were designed using ferrite LH TL in coplanar waveguide configuration. 26. Mohamad Noh Badaruzzaman [email protected] An Automated Microwave Waveguide Measurement Technique An automatic microwave waveguide cell measurement system comprises a microwave VNA under PC control and a data processing section. A PC controls the acquisition of 2-port S parameter data from a waveguide cell and frequency measurements from VNA and then the Nicholson-Ross-Weir (NRW) algorithm is used to convert this data into complex permittivity. For non self-supporting samples, two Perspex windows are used to hold the sample in place. 27. Junaid Zafar [email protected] Analysis of High Power Ferrite Phase Shifter Operating Above Ferrimagnetic Resonance Magnetic losses limit the power handling/frequency performance of all ferrite phase shift and control components. At high power levels nonlinear loss is prevalent but this can be avoided using a technique called “mode segregation” by biasing the ferrite above ferrimagnetic resonance. A combined magnetostatic/microwave finite element scheme is used to model this mode of operation in a high power partial height differential phase shifter. The above resonance operation avoids nonlinear loss but at the cost of reduced differential phase shift and larger external magnetic bias fields. The calculations agree well with the experimental data.




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28. Hassan Khan [email protected] Heterojunction phototransistors for high speed optical detection Particular interest has been attributed to heterojunction phototransistors (HPTs) due to their high frequency operation, stable internal gain and lack of noise due to avalanching. Spectral response, an important performance characteristic for HPTs, has been successfully predicted for the first time through an advance absorption model presented in this poster. The significance of collection efficiency in accurate responsivity modelling is highlighted and it is not considered unity (as with the previous state of the art). This research can be utilised for performance enhancement through device optimisation in photoreceivers and remote sensing applications employing integrated circuits. 29. Jimmy Tan jimmy.tan@ postgrad.manchester.ac.uk Small-Signal Characterization of pHEMTs in Multilayer CPW MMIC Technology using IC-CAP Recent development of multilayer (ML) coplanar waveguide (CPW) MMIC technology promises realization of 3D MMIC in which large area occupying passive components are translated from horizontal into vertical configuration resulting compact structure. The other main advantages of this technology are the eliminations of via-holes and wafer-thinning giving alternative performance solution, if not better, from the traditional MMIC. For the first time, aspects of developing a small-signal model (SSM) for pseudomorphic high electron mobility transistor (pHEMT) in multilayer CPW MMIC environment are addressed. This work presents an automated toolkit for the extraction of small-signal parameters using Agilents IC-CAP. The parameters extractions are completed by using Parameter Extraction Language (PEL) supported by IC-CAP. In order to assess the validity and accuracy of this methodology, comparisons of on-wafer measurements are made to those of simulations. 30. Jiaping Lu jiaping.lu@ postgrad.manchester.ac.uk De-embedding analysis and characterization of CPW multilayer transmission lines Multilayer CPW structures have received much attention in recent years as being a novel alternative. Several 3-D transmission lines integrated for connecting and matching are accurately characterized for their impedance and loss property. As the frequency goes up to several gigahertz, the parasitic of feeders plays a major role and requires careful attention. Using the de-embedding technique developed significant improvement has been obtained in dissipation loss. Furthermore, temperature dependence study is carried out to investigate thermal stability of the components.


mailto:jimmy.tan@%20postgrad.manchester.ac.uk

mailto:jiaping.lu@%20postgrad.manchester.ac.uk

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31. Umar Khalid [email protected] Resource Allocation for Multi-band Single Carrier FDMA The radio spectrum being the expensive and scarce resource needs to be utilized efficiently. This has attracted researchers to develop new scheduling techniques to increase the systems throughput. This poster presents a new scheduling scheme for an uplink mobile system using SC-FDMA. The available spectrum is divided into multiple sub bands for allocating to users. A user which can maximize throughput in a specific sub band is allotted that sub band. The simulation results have shown increase in the data throughput with increasing the number of sub bands. 32. Sarmad Sohaib [email protected]. Asynchronous Polarized Cooperative MIMO Communication In cooperative wireless network, the users exploit spatial diversity by cooperating with each other to alleviate the detrimental effects of fading and to achieve reliable data transfer. A novel asynchronous polarized cooperative communication protocol is presented which does not require frame level synchronization at the relay node. Utilizing dual-polarized antennas, the relay node achieves full duplex amplify-and-forward communication. Hence the transmission duration is significantly reduced which in turn vastly improves throughput rate and reliability. 33. Laith Rashid [email protected] Impact Modelling of Wind Farms on Marine Navigational Radar The impact of wind turbines on radar systems is of increasing concern. This research programme addresses the problem of the offshore wind farm and presents a methodology used to model the interference of wind turbines with pulsed marine navigational radar. It will show the ability to model some of the main issues such as; target spreading, sidelobe detection and the appearance of ghost targets. A comparison between the results from the model and measured data taken near the North Hoyle wind farm and at Kentish Flats wind farm, UK is provided. The research undertaken within this programme was partially funded by the DTI’s innovation award and the EPSRC’s Supergen programme.




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34. Chris Masouros [email protected] Dynamic Code Allocation for Constructive Interference Exploitation in DS-CDMA Systems In this contribution a new dynamic code distribution technique is presented. This method chooses the optimal code-to-user allocation for transmission between different combinations of the available signature waveforms according to the data to be transmitted at every symbol period by the base station (BS) at the downlink of a cellular code division multiple access (CDMA) system. The selection is done with the aim to minimise the destructive and maximize constructive interference between users. This effectively spreads the signal constellation and enhances the signal to interference-plus-noise ratio (SINR) at the receiver with no additional power-per-user investment. However, the trade-off to this is some extra side information. Theoretical analysis and simulations presented suggest that this method can provide a bit error rate reduction of an order of a magnitude when combined with multiuser detection. 35. Leboli Thamae [email protected] Multiport Dielectric Resonator Antennas for MIMO Applications Multiple-input multiple-output (MIMO) systems employ arrays of spatially-separated antennas to enhance capacities in wireless multimedia communications. Use of single-element dielectric resonator antennas (DRAs) with two feeds exciting orthogonal radiation modes leads to compact designs requiring less space on small mobile terminals. Results of dual-polarized DRAs demonstrate two MIMO branches with good diversity performance for providing independent uncorrelated data streams. 36. Mohamed Soliman [email protected] Buried Object Location Based on Frequency Domain UWB Measurements Wideband ground penetrating radar (GPR) system and a proposed frequency domain data analysis technique are presented for the detection of shallow buried objects such as anti-personal (AP) land mines. This system is able to acquire, save and analyze the data in the frequency domain. Wide-angle reflection and refraction (WARR) technique has been used for acquiring and processing the data. This technique is effective for the rejection of the ground surface clutter. By applying the C-scan scheme, metallic mine-like target buried in dry soil will be located.




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37. Tauseef Tauqeer [email protected] Low Power GHz Class ADC for Wide-Band Communication Systems

A low-power (~200mW) high-speed (2GS/s) 4-bit analogue to digital converter (ADC) based on an InP/InGaAs 1.5×5�m2 emitter area heterojunction bipolar transistor (HBT) has been designed and simulated. The technology used was developed at the University of Manchester using MBE growth which relied upon two novel developments. Firstly stoichiometric conditions permitted growth at a relatively low temperature (420oC) while conserving extremely high quality materials. Secondly dimeric phosphorus was generated from a gallium phosphide (GaP) decomposition source leading to excellent device properties. 38. Shahzad Arshad [email protected] Modelling Kink Effect in InA1As/InGaAs pHEMTs using 2D Physical Device Simulator The InAlAs/InGaAs material system provides one of the highest transconductance pHEMT devices because of its large conduction band discontinuity, high electron mobility and very good carrier confinement in the channel. The DC characteristics, however, show a sudden rise in drain current at fixed value of drain voltage, resulting in high drain conductance and reduced voltage gain. This undesirable phenomenon is called Kink Effect. In this work a comprehensive understanding of the causes of this effect is developed using SILVACO ATLAS1 2-D physical simulator. 39. David Barr david [email protected] Biologically Plausible Topographic Neural Network Simulation on Fine-Grain Processing Systems Biologically plausible neural network simulations are traditionally computationally complex and time consuming to perform. These problems are scaled when targeting real-time embededded applications. Coarse-grain parallelism provided through multi-core processors and processing clusters offers little performance increase and requires resources often unsuitable for the intended application. This work highlights how fine-grain processor arrays can significantly accelerate the simulation of topographic biologically inspired systems, when combined with a parametric approach to data representation.



mailto:david%[email protected]

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40. Beung Yea [email protected] Optical Studies of InGaN quantum dots Self-assembling InGaN quantum dots (QDs) have been grown within a GaN matrix via Metalorganic chemical vapour deposition (MOCVD), with variations in the deposition time used to vary the properties of the dots. An interrupted growth mode was employed for the growth of the strain induced quantum dots. We combined Raman spectroscopy (RS), Photoluminescence (PL) and Atomic force microscopy (AFM) measurements to investigate optical properties, microstructure, vibrational and mechanical properties of the InGaN/GaN/sapphire layers. 41. Vesel Haxha [email protected] The Use of Improved Kinetic Models of Segregation for Semiconductor Alloys In this work we show the use of an optimally parameterized empirical potential of the Abell-Tersoff type, and we study the strain energy as a function of composition. We then use the calculated values to compute modified segregation energies in an improved kinetic model of segregation for the combined effects of group III and V exchange processes during epitaxial growth. We compare with experimental data from Scanning Tunnelling Microscopy of InAs self assembled quantum dots capped by GaSbAs and demonstrate a much improved agreement between theory and experiment than that obtainable with the classic theory of segregation 42. Dan James [email protected] Electrical Characterisation of Specific-Sized Quantum Dots Quantum dots present a myriad of interesting avenues of study and application, in both academic and industrial application. These include high-efficiency LEDs and lasers, single-photon sources and high-density memory devices. Electrical characterisation techniques including DLTS and Laplace DLTS can probe the nature of these intriguing nanostructures and overcome the fundamental limitation to the study of quantum dots, i.e. their heterogeneity. The work presented here attempts to overcome this barrier, either by optically isolating specific sizes of quantum dot, growing an ensemble of identically-sized dots or ideally by studying a single dot.




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43. Iain Crowe [email protected] PL Studies of Erbium and Phosphorus Doped SiOx:nc-Si Recently reported works on narrow (<kBT) luminescence line-widths from single silicon nano-crystals have opened up the possibility of developing silicon based quantum dot devices as alternatives to those based on conventional III-V systems. In this work we explore the origin of the luminescence from un-doped and both rare-earth (Er) and Phosphorus (P) doped nano-crystalline silicon (nc-Si) implanted in a SiOx matrix. The PL intensity and life-time dependence on doping concentration, excitation power and wavelength as well as future work to investigate micro-photoluminescence of individual Si-nc’s are presented. 44. Tingting Wen [email protected] Control in TCP over Wireless Network Wireless technologies have received much attention for their flexibility of information exchange. In this poster, congestion control of a flow in the wireless network is considered in terms of control theory viewpoint and a novel active queue management scheme is presented based on a high gain observer to overcome low throughput over wireless lossy links. Validations both in Matlab and ns2 (Networks Simulator) of wireless TCP together with the proposed queue management method show its advantaged in dealing with uncertainties like high bit error. 45. Oskar Vivero [email protected] On Maximum Likelihood Estimation Methods for Dynamical Systems with 1/f Spectra The estimation of the parameters involved in dynamical processes with fractal behaviour is presented in this work. The complex behaviour pertaining to such types of systems steps outside of the realm of lumped linear dynamics, and hence, standard methods such as prediction error identification do not necessarily cover the particularities embedded on the parameter estimation problem. An analysis over the properties of fractal noises is presented along with its effect over the convergence of the Maximum Likelihood Estimation method.




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46. Xin Li [email protected] Characterization of Carbon Fibre Reinforced Composite by Means of Non-Destructive Eddy Current Testing and FEM Modeling The limitation of non-destructive methods for the inspection of carbon fibre reinforced plastic (CFRP) composites is a major problem for many practical applications of the material, especially in the aircraft industry. With eddy current methods, the inductive probes can used to inspect CFRP for structure characterization, defects detection and performance monitor effectively. And, 3D finite element method (FEM) computer simulations have also been developed to demonstrate the coupling of the probes and samples, and to support the experimental method. 47. Xiao Hu [email protected] An impedance-analyser-based multi-channel imaging system and its applications Imaging systems based on impedance measurement are widely used in many applications, e.g. medical, process monitoring and non-destructive testing. While it is often that their hardware designs, measurement range and accuracy are application-specific, it is useful to develop a universal multi-channel imaging system based on an impedance analyser. This paper presents such a system, which consists of a specifically designed multiplexer box with reeds relay switches, hardware interface circuits and corresponding software, in addition to an HPxxxx impedance analyser. The objective is to achieve excellent performance in impedance measurement and flexibility to work with different sensors. A Matlab-based GUI has been developed to implement various algorithms and to facilitate data analysis. The system has been demonstrated being a useful tool for a wide range of applications involving impedance measurement, and single- or multi-modality 2D or 3D imaging, including (a) imaging a flow in a porous medium, (b) 3D electrical capacitance tomography (ECT) and (c) security scanning with dual-modality planar capacitive and magnetic sensor arrays. 48. Swee Peng Ang [email protected] Power Transformer Ferroresonance Suppression by Shunt Reactor Switching Ferroresonance is a phenomenon affecting electrical power systems which could cause damaging overvoltages and currents. For ferroresonance to occur, the power networks must include: a sinusoidal voltage supply and capacitances, generally due to lines or circuit breakers, grading capacitors, a transformer or nonlinear inductance such as a transformer on no or light-load. Part of the research involves a case study which is based on a National Grid enquiry to access their transmission system whether there is any likelihood of sustained fundamental frequency where ferroresonance would occur. Mitigation measures to quench the intended ferroresonance have been performed by switching-in a 60 MVA shunt reactor at the 13 kV low voltage winding. The modelling work has been carried out using commercially available ATP software.




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49. Prabath Binduhewa [email protected] Standard Microsource Interface for a Microgrid A MicroGrid is a small power system providing electricity and heat for local users which could be operated either autonomously or grid connected. The plug-and-play functionality of a typical MicroGrid should enable the connection of any microsource at any point without changing the system significantly. To achieve this feature, a ‘standard microsource interface’ concept with embedded energy storage in the form of ultracapacitors is proposed. The photovoltaic panel (the microsource) is connected to the MicroGrid through an inverter and the energy storage is connected to the dc-link via a bi-directional converter. 50. Kevin James Dyke [email protected] Fuel Cell Interfacing for Distributed Generation Solid Oxide Fuel Cell (SOFC) systems provide a high efficiency energy conversion system which can be operated from a variety of fuel sources. However, fuel cell voltage regulation is poor requiring careful design of the power conversion electronics needed to integrate systems with existing electrical networks. This EngD project investigates these challenges in particular multiple system configurations. 51. Shaofan Qi [email protected] Piezoelectric Energy Harvesting Device Energy harvesting is the process of converting low level ambient mechanical energy into usable electrical energy, so that remote electronic instruments can be powered without the need for batteries or other supplies. Piezoelectric material has the ability to convert mechanical energy into electrical energy, and harvesters using this are being intensely investigated. The proposed new design of piezoelectric cantilever harvester should be suitable for use by remote instruments, such as wireless sensor nodes, in remote environments where replacement of batteries is difficult, but there is a plentiful supply of vibration energy.




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52. Ali Milad Jarushi [email protected] Study of Energy Source combinations for hybrid vehicle The work aims to simulate a combination of energy sources for a hybrid vehicle in Matlab/Simulink environment and to optimise the energy storage combination to realize the full potential. The simulation platform will be used to assess different energy source combinations to achieve an energy efficient combination, to get good performance, but importantly, to understand the energy source interconnection issues in terms of energy flow and circuit transients. The model will improve the interconnectivity of various energy sources on vehicles and facilitate greater detailed specifications for any interface electronics. In addition, the model has ability to accept any faults might occur on any component to allow users to test the system performance in case that fault occurs. 53. Stephen Woolaghan [email protected] Current Source Convertors for Vehicular Applications There are a number of problems encountered when operating variable speed brushless permanent magnet drive system that limit their use in automotive and aerospace vehicular applications. These problems include; faults during high speed operation, control of high speed low inductance machines and the presence of electrolytic capacitors on the DC link. Current Source Convertors could potentially address some or all of these issues but development has been slow due to the perceived simpler structure of the Voltage Source Convertor. 54. Paul Tuohy [email protected] Rim Driven Marine Thrusters The aim of this project is to develop rim-driven motor (generator) technologies for marine applications. The project will explore the use of electrical machines integrated directly into the structure of a thruster, specifically the housing around the propeller itself together with environmental containment. A “rim–driven” thruster integrates the propeller with the electrical machine that is driving it by mounting the motor directly around the outside of the propeller. The need for an inverter can be avoided by integrating a conducting induction–can into the rotor to produce a novel topology for this type of application: a line–start permanent–magnet (LSPM) thruster that can start directly from the vessel’s electrical supply. The project is presently in the design phase of a 30 kW LSPM rim-drive prototype machine for use as a positioning (bi-directional) thruster within a 500 kW deep-sea tidal generator.




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55. Naayagi Ramasamy [email protected] Bidirectional DC-DC Converter for Aircraft Energy Storage Systems To meet the peak power demands of aircraft electric loads, e.g., electric actuators and to absorb regenerated power, an ultracapacitor based energy storage system is proposed to deliver 20 kW of power for 30 seconds time. The system provides clean and stable power to aircraft loads during transients through a bi-directional Dual Active Bridge DC-DC converter. The converter essentially acts as an interface between the ultracapacitor energy storage bank and the 100 kW aircraft electrical power network in the Intelligent Electrical Power Networks Evaluation Facility. 56. Fayez Al-rifai [email protected] Enhancing the performance of sensorless permanent magnet drives by measured torque feedback Rotor position information for brushless permanent magnet machines is generally obtained using position sensors. Due to the disadvantages of employing position sensors, sensorless operation of permanent magnet motor is being studied. These techniques measure voltages and currents of the drive system and use a machine model to estimate rotor position, typically by employing an observer (i.e. sliding mode, Kalman filter, etc.). These sensorless techniques behave poorly at stand still and low speeds (0-100rpm). This project is investigating the performance of sensorless operation at all speeds by using an integrated, low-cost, torque transducer in place of the position sensor. 57. Tom Clark [email protected] A High Power Impedance Measurement System The aim of this project is to design and build a system capable of measuring the impedance of various systems within the Integrated Electrical Power Networks Evaluation Facility (IEPNEF). The Impedance Measurement System (IMS) must be capable of measuring the dynamic impedance of an energized network with a 550V DC supply driving one or more non-linear loads with a maximum rating of 100kW. This system includes an Agilent network analyzer to provide a swept frequency disturbance signal and to measure magnitude and phase of the impedance for the SUT. It also includes a linear power amplifier to amplify the disturbance signal generated by the network analyzer and a custom transformer to inject the disturbance signal onto the SUT.




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