• United Kingdom

Accepting PhD Students

20042023
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Research Output 2004 2019

2019
4 Citations (Scopus)

Adaptive power transformer lifetime predictions through machine learning and uncertainty modelling in nuclear power plants

Aizpurua, J. I., McArthur, S. D. J., Stewart, B. G., Lambert, B., Cross, J. G. & Catterson, V. M., 1 Jun 2019, In : IEEE Transactions on Industrial Electronics. 66, 6, p. 4726-4737 12 p.

Research output: Contribution to journalArticle

Open Access
File
Power transformers
Nuclear power plants
Learning systems
Measurement errors
Uncertainty

A high voltage capacitor element model

Mackinnon, C. J. & Stewart, B. G., 16 Jun 2019. 4 p.

Research output: Contribution to conferencePaper

Open Access
File
Capacitors
Electric potential
Power electronics
Short circuit currents
Insulation

Improved power transformer condition monitoring under uncertainty through soft computing and probabilistic health index

Aizpurua, J. I., Stewart, B. G., McArthur, S. D. J., Lambert, B., Cross, J. G. & Catterson, V. M., 23 May 2019, (Accepted/In press) In : Applied Soft Computing. p. 1-25 25 p.

Research output: Contribution to journalArticle

Soft computing
Power transformers
Condition monitoring
Health
Nuclear power plants

Towards a data analytics framework for medium voltage power cable lifetime mangement

Aizpurua, J. I., Stewart, B. G., McArthur, S. D. J., Jajware, N., Kearns, M. & Banerjee, S., 9 Feb 2019, 11th Nuclear Plant Instrumentation, Control and Human Machine Interface Technology. La Grange Park, Ill.: American Nuclear Society, 10 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

Open Access
File
Cables
Health
Electric potential
Condition monitoring
Electric fuses

Towards a hybrid power cable health index for medium voltage power cable condition monitoring

Aizpurua, J. I., Stewart, B. G., McArthur, S. D. J., Jajware, N. & Kearns, M., 16 Jun 2019. 4 p.

Research output: Contribution to conferencePaper

Open Access
File
Condition monitoring
Cables
Health
Electric potential
Physics
2018
1 Citation (Scopus)

An investigative study on the influence of correlation of PD statistical features on PD pattern recognition

Mas'ud, A. A. & Stewart, B. G., 1 Nov 2018, 2nd IEEE International Conference on Dielectrics (ICD) 2018. Piscataway, N.J.: IEEE, 5 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

Open Access
File
Partial discharges
Pattern recognition
Neural networks

A proposed energy and performance aware cloud framework for improving service level agreements (SLAs) in cloud datacenters

Al-Mahruqi, A. A. H., Athinarayanana, V., Morison, G. & Stewart, B. G., 30 Sep 2018, In : International Journal of Applied Engineering Research. 13, 16, p. 12917-12922 6 p.

Research output: Contribution to journalArticle

Open Access
File
Servers
Computer hardware
Energy utilization
Cloud computing
Computational efficiency
2 Citations (Scopus)

Classification of EMI discharge sources using time-frequency features and multi class support vector machine

Mitiche, I., Morison, G., Nesbitt, A., Hughes-Narborough, M., Stewart, B. G. & Boreham, P., 31 Oct 2018, In : Electric Power Systems Research. 163, Part A, p. 261-269 9 p.

Research output: Contribution to journalArticle

Open Access
File
Signal interference
Support vector machines
Feature extraction
Power plants
Condition monitoring

Classification of multiple electromagnetic interference events in high voltage power plant

Mitiche, I., Morison, G., Nesbitt, A., Hughes-Narborough, M., Stewart, B. G. & Boreham, P., 11 Jul 2018, (Accepted/In press) 53rd International Universities Power Engineering Conference. Piscataway, N.J.: IEEE, 4 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

Open Access
File
Signal interference
Power plants
Electric potential
Intelligent systems
Spectrum analysis
4 Citations (Scopus)

Classification of partial discharge signals by combining adaptive local iterative filtering and entropy features

Mitiche, I., Morison, G., Nesbitt, A., Hughes-Narborough, M., Stewart, B. G. & Boreham, P., 31 Jan 2018, In : Sensors. 18, 2, 14 p., 406.

Research output: Contribution to journalArticle

Open Access
File
electromagnetic interference
Electromagnetic Phenomena
Partial discharges
Entropy
Signal interference

Deep residual neural network for EMI event classification using bispectrum representations

Mitiche, I., Jenkins, M. D., Boreham, P., Nesbitt, A., Stewart, B. G. & Morison, G., 21 Jun 2018, (Accepted/In press) 26th European Signal Processing Conference (EUSIPCO). Piscataway, NJ: IEEE, 5 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

Open Access
File
Signal interference
Neural networks
Higher order statistics
Image classification
Condition monitoring

Effect of voltage reduction in minimising partial discharge activity in cables - experimental study

Mohamed, F. P., Siew, W. H., Sheng, B. & Stewart, B., 12 Jan 2018, CEIDP 2017 - IEEE Conference on Electrical Insulation and Dielectric Phenomenon. Piscataway, N.J.: IEEE, p. 331-334 4 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

Open Access
File
Partial discharges
Cables
Electric potential
Insulation
Defects

Entropy-based feature extraction for electromagnetic discharges classification in high-voltage power generation

Mitiche, I., Morison, G., Nesbitt, A., Stewart, B. G. & Boreham, P., 25 Jul 2018, In : Entropy. 20, 8, 20 p., 549.

Research output: Contribution to journalArticle

Open Access
File
Signal interference
pattern recognition
electromagnetic interference
Power generation
Feature extraction

Imaging time series for the classification of EMI discharge sources

Mitiche, I., Morison, G., Nesbitt, A., Hughes-Narborough, M., Stewart, B. G. & Boreham, P., 14 Sep 2018, In : Sensors. 18, 9, 17 p., 3098.

Research output: Contribution to journalArticle

Open Access
File
electromagnetic interference
Electromagnetic Phenomena
Signal interference
Time series
Imaging techniques

MV cable lifetime improvement analysis through transformer tap changes

Sheng, B., Peer Mohamed, F., Siew, W. H. & Stewart, B. G., 15 Jan 2018, 2017 IEEE Conference on Electrical Insulation and Dielectric Phenomena. Piscataway, N.J., p. 177-180 4 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

Open Access
File
Cables
Electric potential
Thermal stress
Temperature
9 Citations (Scopus)

Power transformer dissolved gas analysis through Bayesian networks and hypothesis testing

Aizpurua, J. I., Catterson, V. M., Stewart, B. G., McArthur, S. D. J., Lambert, B., Ampofo, B., Pereira, G. & Cross, J. G., 19 Apr 2018, In : IEEE Transactions on Dielectrics and Electrical Insulation. 25, 2, p. 494-506 12 p.

Research output: Contribution to journalArticle

Open Access
File
Gas fuel analysis
Power transformers
Bayesian networks
Testing
Failure analysis
1 Citation (Scopus)

Selecting appropriate machine learning classifiers for DGA diagnosis

Aizpurua Unanue, J. I., Catterson, V., Stewart, B. G., McArthur, S., Lambert, B., Ampofo, B., Pereira, G. & Cross, J., 15 Jan 2018, 2017 IEEE Conference on Electrical Insulation and Dielectric Phenomena. Piscataway, N.J., p. 153-156 4 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

Open Access
File
Gas fuel analysis
Learning systems
Classifiers
Support vector machines
Health

Simulation of high voltage direct current filters

Mackinnon, C. J. & Stewart, B. G., 11 Jul 2018, (Accepted/In press) 53rd International Universities Power Engineering Conference. Piscataway, N.J.: IEEE, 5 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

Open Access
File
Electric power transmission networks
Electric commutation
Filter banks
Power electronics
Resistors

Uncertainty-aware fusion of probabilistic classifiers for improved transformer diagnostics

Aizpurua, J. I., Catterson, V. M., Stewart, B. G., McArthur, S. D. J., Lambert, B. & Cross, J. G., 3 Dec 2018, In : IEEE Transactions on Systems Man and Cybernetics: Systems. p. 1-13 13 p.

Research output: Contribution to journalArticle

Open Access
File
Classifiers
Fusion reactions
Gas fuel analysis
Insulating oil
Uncertainty
2017
2 Citations (Scopus)

A combined algorithm approach for PD location estimation using RF antennas

Fresno, J. M., Robles, G., Martinez-Tarifa, J. M. & Stewart, B. G., 18 Aug 2017, 2017 IEEE Electrical Insulation Conference (EIC). Piscataway, NJ: IEEE

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

Open Access
File
Maximum likelihood
Antennas
Electromagnets
Partial discharges
Sampling

An evaluation of total variation signal denoising methods for partial discharge signals

Mitiche, I., Morison, G., Nesbitt, A., Hughes-Narborough, M., Boreham, P. & Stewart, B. G., 11 Apr 2017, (Accepted/In press) p. 1-5.

Research output: Contribution to conferencePaper

Open Access
File

A selective control information detection scheme for OFDM receivers

Adegbite, S. A., McMeekin, S. G. & Stewart, B. G., 6 Jan 2017, In : Telecommunication Systems. 64, 1, p. 31-41 11 p.

Research output: Contribution to journalArticle

Open Access
File
Orthogonal frequency division multiplexing
Maximum likelihood
Maximum likelihood estimation
Channel estimation
Communication
5 Citations (Scopus)

Classification of partial discharge EMI conditions using permutation entropy-based features

Mitiche, I., Morison, G., Nesbitt, A., Boreham, P. & Stewart, B. G., 26 Oct 2017, 25th European Signal Processing Conference (EUSIPCO). Piscataway, NJ.: IEEE, p. 1375-1379 5 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

Open Access
File
Partial discharges
Signal interference
Entropy
Condition monitoring
Support vector machines

Classification of partial discharge signals by combining adaptive local iterative filtering and entropy features

Mitiche, I., Morison, G., Hughes-Narborough, M., Nesbitt, A., Boreham, P. & Stewart, B. G., 10 Oct 2017, (Accepted/In press) 2017 IEEE Conference on Electrical Insulation and Dielectric Phenomena. p. 335-338 4 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

Open Access
File
Partial discharges
Signal interference
Entropy
Auxiliary equipment
Condition monitoring
1 Citation (Scopus)

Computational efficient SLM–OFDM receiver for time-invariant indoor fading channel

Adegbite, S. A., McMeekin, S. & Stewart, B. G., 1 Nov 2017, In : Wireless Personal Communications. 97, 1, p. 661-674 14 p.

Research output: Contribution to journalArticle

Open Access
File
Fading channels
Orthogonal frequency division multiplexing
Modulation
Decoding
Computational complexity

Determining appropriate data analytics for transformer health monitoring

Aizpurua, J. I., Catterson, V. M., Stewart, B. G., McArthur, S. D. J., Lambert, B., Ampofo, B., Pereira, G. & Cross, J. G., 5 Apr 2017, (Accepted/In press) 10th International Topical Meeting on Nuclear Plant Instrumentation, Control and Human Machine Interface Technologies. La Grange Park, p. 1-11 11 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

Open Access
File
Health
Monitoring
Specifications
Economic and social effects
Gas fuel analysis

Effect of voltage reduction in minimising partial discharge activity in cables – experimental study

Siew, W. H., Peer Mohamed, F., Sheng, B. & Stewart, B., 22 Oct 2017.

Research output: Contribution to conferencePoster

Partial discharges
Cables
Electric potential
Insulation
Defects

Improving the accuracy of transformer DGA diagnosis in the presence of conflicting evidence

Aizpurua, J. I., Catterson, V. M., Stewart, B. G., McArthur, S. D. J., Lambert, B., Ampofo, B., Pereira, G. & Cross, J. G., 18 Aug 2017, 2017 IEEE Electrical Insulation Conference (EIC). Piscataway, NJ: IEEE, 4 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

Open Access
File
Gas fuel analysis
Bayesian networks
Insulating oil
Condition monitoring
Failure analysis

Pre-determination of partial discharge inception voltage in power cables using electrode gaps in air under AC voltage

P. Mohamed, F., Siew, W. H., Sheng, B., Stewart, B. G. & Morris, E. A., 10 Oct 2017, (Accepted/In press). 5 p.

Research output: Contribution to conferencePaper

Open Access
File
Partial discharges
Cables
Electrodes
Electric potential
Air
6 Citations (Scopus)

Quantification of the performance of iterative and non-iterative computational methods of locating partial discharges using RF measurement techniques

El Mountassir, O., Stewart, B. G., Reid, A. J. & McMeekin, S. G., 28 Feb 2017, In : Electric Power Systems Research. 143, p. 110–120 11 p.

Research output: Contribution to journalArticle

Open Access
File
Partial discharges
Computational methods
Iterative methods
Antenna arrays
Antennas
15 Citations (Scopus)

Survey on the performance of source localization algorithms

Fresno, J. M., Robles, G., Martínez-Tarifa, J. M. & Stewart, B. G., 18 Nov 2017, In : Sensors. 17, 11, 25 p., 2666.

Research output: Contribution to journalArticle

Open Access
File
Least-Squares Analysis
estimators
Maximum likelihood
sensors
Sensors
2016
1 Citation (Scopus)

A joint OFDM PAPR reduction and data decoding scheme with no SI estimation

Adegbite, S. A., McMeekin, S. G. & Stewart, B. G., 1 Dec 2016, In : EURASIP Journal on Wireless Communications and Networking. 2016, 1, 108.

Research output: Contribution to journalArticle

Open Access
File
Orthogonal frequency division multiplexing
Decoding
Modulation
Phase modulation
Demodulation
7 Citations (Scopus)
Open Access
File
Orthogonal frequency division multiplexing
Computational complexity
Recovery
Power amplifiers
9 Citations (Scopus)

An investigative study into the sensitivity of different partial discharge φ-q-n pattern resolution sizes on statistical neural network pattern classification

Mas'ud, A. A., Stewart, B. G. & McMeekin, S. G., 31 Oct 2016, In : Measurement. 92, p. 497-507 11 p.

Research output: Contribution to journalArticle

Open Access
File
Partial discharges
Pattern recognition
Neural networks
sensitivity
Bins

A review of performance and energy aware improvement methods for future green cloud computing

Al-Mahruqi, A. A. H., Stewart, B. G., Hainey, B. & Vallavaraj, A., 18 Jun 2016, In : International Journal of Computer Applications. 144, 11, p. 18-24 7 p.

Research output: Contribution to journalArticle

Open Access
File
Cloud computing
Energy utilization
Quality of service
Personnel
Degradation
1 Citation (Scopus)

A time-domain control signal detection technique for OFDM

Adegbite, S. A., McMeekin, S. G. & Stewart, B. G., 19 Jul 2016, In : EURASIP Journal on Wireless Communications and Networking. 2016, 10 p., 171.

Research output: Contribution to journalArticle

Open Access
File
Signal detection
Orthogonal frequency division multiplexing
Maximum likelihood estimation
Channel estimation
Maximum likelihood

Selective control information detection in 5G frame transmissions

Adegbite, S. A. & Stewart, B. G., 14 Dec 2016, Towards 5G Wireless Networks - A Physical Layer Perspective. Bizaki, H. K. (ed.). Rijeka, Croatia, p. 215-232 19 p. Chapter 10

Research output: Chapter in Book/Report/Conference proceedingChapter

Open Access
File
Frequency division multiplexing
Channel estimation
Mean square error
Communication systems
Information systems

The influence of antenna positioning errors on the radio-frequency localization of partial discharge sources

Fresno, J. M., Robles, G., Stewart, B. G. & Martínez-Tarifa, J. M., 14 Nov 2016, Proceedings of the 3rd International Electronic Conference on Sensors and Applications. Messervey, T. (ed.). Vol. 3. 7 p. E003. (Sciforum Electronic Conference Series; vol. 3).

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

Open Access
File
Partial discharges
Antennas
Insulation
Systematic errors
Antenna arrays
2015

A 2-stage SI estimation scheme for SLM-OFDM systems without SI transmission

Adegbite, S. A., McMeekin, S. G. & Stewart, B. G., 4 Jun 2015, 2015 Wireless Telecommunications Symposium, WTS 2015. [Piscataway, NJ], 5 p. 7117240

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

Orthogonal frequency division multiplexing
Maximum likelihood
Computational complexity
3 Citations (Scopus)

A PAPR reduction and data decoding for SLM based OFDM systems without SI

Adegbite, S. A., McMeekin, S. G. & Stewart, B. G., 2015, p. 1-5. 5 p.

Research output: Contribution to conferenceOther

Open Access

Electric field distribution on the outer surface of lower porcelain of an OIP transformer bushing-accumulation of metal-contained colloid

Nekahi, A., Stewart, B. G. & McMeekin, S. G., 15 Oct 2015, 2015 IEEE 11th International Conference on the Properties and Applications of Dielectric Materials (ICPADM). [Piscataway, NJ]: IEEE, p. 632-635 4 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

Bushings
Porcelain
Colloids
Electric fields
Metals
2 Citations (Scopus)

Improved PCFICH decoding in LTE systems

Adegbite, S. A., McMeekin, S. G. & Stewart, B. G., 2015, p. 1-6. 6 p.

Research output: Contribution to conferenceOther

Open Access
Decoding
Channel estimation
Maximum likelihood
Maximum likelihood estimation
Fading channels
6 Citations (Scopus)

On the energy-delay tradeoff and relay positioning of wireless butterfly networks

Vien, Q-T., Nguyen, H., Stewart, B., Choi, J. & Tu, W., 2015, In : IEEE Transactions on Vehicular Technology. 64, 1, p. 159-172 14 p.

Research output: Contribution to journalArticle

Network coding
Network Coding
Relay
Positioning
Wireless networks
9 Citations (Scopus)

Optimising OFDM based visible light communication for high throughput and reduced PAPR

Popoola, W. O., Ghassemlooy, Z. & Stewart, B., 14 Sep 2015, p. 1322-1326. 5 p.

Research output: Contribution to conferenceOther

Open Access
frequency division multiplexing
optical communication
bandwidth
penalties
telecommunication
3 Citations (Scopus)

Prolate-binary sequences for SLM based papr reduction in OFDM systems

Adegbite, S. A., McMeekin, S. G. & Stewart, B. G., 2015, p. 1-5. 5 p.

Research output: Contribution to conferencePaper

Open Access
Binary sequences
Orthogonal frequency division multiplexing
Computational complexity
Computer simulation

Reduction of PAPR of OFDM symbols using modified Narahashi and Nojima phasing sequences

Athinarayanan, V. & Stewart, B., 1 Feb 2015, In : International Journal of Electronics and Electrical Engineering. 3, 1, p. 80-83 4 p.

Research output: Contribution to journalArticle

Quadrature phase shift keying
Orthogonal frequency division multiplexing
1 Citation (Scopus)

Statistical analysis of simultaneous partial sischarge measurements from IEC60270, HFCT and HFCT EMI methods

Gillie, R., Nesbitt, A., Ramirez-Iniguez, R., Stewart, B. G. & Kerr, G., 2015, 33rd Electrical Insulation Conference, EIC 2015. Institute of Electrical and Electronics Engineers Inc., p. 454-457 4 p. 7223573

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

Electric instrument transformers
Signal interference
Statistical methods
Partial discharges
Frequency bands
2014
24 Citations (Scopus)

Application of an ensemble neural network for classifying partial discharge patterns

Mas'ud, A. A. A., Stewart, B. G. & McMeekin, S. G., 31 May 2014, In : Electric Power Systems Research. 110, p. 154-162 9 p.

Research output: Contribution to journalArticle

Partial discharges
Neural networks
Geometry
12 Citations (Scopus)

Arc energy and temperature during its propagation over ice-covered surfaces

Nekahi, A., Farokhi, S., Farzaneh, M. & Stewart, B., 31 Jan 2014, In : IEEE Transactions on Plasma Science. 42, 1, p. 114-119 6 p.

Research output: Contribution to journalArticle

Ice
ice
arcs
propagation
Temperature
4 Citations (Scopus)

Distributed space-time-frequency block code for cognitive wireless relay networks

Vien, Q-T., Stewart, B., Nguyen, H. & Gemikonakli, O., 31 Mar 2014, In : IET Communications. 8, 5, p. 754-766 13 p.

Research output: Contribution to journalArticle

Block codes
Fading (radio)
Frequency selective fading
Rayleigh fading
Fading channels