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Study of CO2 bubble dynamics in seawater from QICS field Experiment
Presentation / Conference Contribution
Chen, B., Dewar, M., Sellami, N., Stahl, H., & Blackford, J. (2013, December). Study of CO2 bubble dynamics in seawater from QICS field Experiment. Presented at AGU Fall Meeting 2013, San Francisco, US

One of the concerns of employing CCS at engineering scale is the risk of leakage of storage CO2 on the environment and especially on the marine life. QICS, a scientific research project was launched with an aim to study the effects of a potential lea... Read More about Study of CO2 bubble dynamics in seawater from QICS field Experiment.

Optical performances of refractive Crossed Compound Parabolic Concentrator CCPC
Presentation / Conference Contribution
Sellami, N., & Mallick, T. (2014, September). Optical performances of refractive Crossed Compound Parabolic Concentrator CCPC. Presented at 29th European Photovoltaic Solar Energy Conference and Exhibition, Amsterdam

The design of solar concentrators depends on its application (thermal or PV) and on the tracking system that will be used. Low geometrical concentration ratios (Cg) are <10x and generally tend to be static concentrators; in this case they have to be...

Optical and heat transfer performance of a novel non-imaging concentrator
Presentation / Conference Contribution
Sellami, N., Meng, X.-L., Xia, X.-L., Knox, A. R., & Mallick, T. K. (2015, December). Optical and heat transfer performance of a novel non-imaging concentrator. Presented at 11th International Conference on Concentrator Photovoltaic Systems: CPV-11, Aix-les-Bains, France

In this study, the Crossed Compound Parabolic Concentrator CCPC is modified to demonstrate for the first time a new generation of solar concentrators working simultaneously as an electricity generator and thermal collector. It is designed to have two... Read More about Optical and heat transfer performance of a novel non-imaging concentrator.

An Experimental Investigation into Passive Temperature Regulation of a Novel WICPV System with Phase Change Material
Presentation / Conference Contribution
Sharma, S., Sellami, N., Tahir, A., & Mallick, T. (2016, June). An Experimental Investigation into Passive Temperature Regulation of a Novel WICPV System with Phase Change Material. Presented at 32nd European Photovoltaic Solar Energy Conference and Exhibition, Munich, Germany

A novel Window-Integrated Concentrated Photovoltaic (WICPV) system proposed suitable for window integration, has been fabricated and characterised at 1000 Wm-2 (higher irradiance)and 500 Wm-2 (lower irradiance). This paper investigates the use of a c... Read More about An Experimental Investigation into Passive Temperature Regulation of a Novel WICPV System with Phase Change Material.

Optical performance modelling of an atypical 3-D cross compound parabolic photovoltaic concentrator using ray trace technique
Presentation / Conference Contribution
Sellami, N., Mallick, T. K., & Mcneil, D. (2014, March). Optical performance modelling of an atypical 3-D cross compound parabolic photovoltaic concentrator using ray trace technique. Presented at Photovoltaic Science and Technology Conference-6 (PVSAT-6), Southampton

The electricity productions by free fuel solar cells represent one of the best solutions for reducing CO 2 emission and surpassing oil crisis. Large scale photovoltaic power generation showed a good efficiency in production, but small scale installat... Read More about Optical performance modelling of an atypical 3-D cross compound parabolic photovoltaic concentrator using ray trace technique.

Scalable solar thermoelectrics and photovoltaics (SUNTRAP)
Presentation / Conference Contribution
Sweet, T. K., Rolley, M., Min, G., Knox, A., Gregory, D., Paul, D., Paul, M., Montecucco, A., Siviter, J., Mullen, P., & et al. (2016, April). Scalable solar thermoelectrics and photovoltaics (SUNTRAP). Presented at 12th International Conference On Concentrator Photovoltaic Systems (CPV-12), Freiburg, Germany

This paper presents the design, manufacture and electrical test of a novel integrated III:V low concentrator photovoltaic and thermoelectric device for enhanced solar energy harvesting efficiency. The PCB-based platform is a highly reliable means of... Read More about Scalable solar thermoelectrics and photovoltaics (SUNTRAP).

Experimental performance of concentrating photovoltaic thermal module
Presentation / Conference Contribution
Adeilla, S., Sellami, N., & Tapas, M. (2016, March). Experimental performance of concentrating photovoltaic thermal module. Presented at 2016 7th International Renewable Energy Congress (IREC), Hammamet, Tunisia

A concentrating photovoltaic thermal system is composed of multiple concentrator modules which designed with wide acceptance angle such (Hyperbolic Profile) to collect high illumination flux that can be used for building integrated applications, in o... Read More about Experimental performance of concentrating photovoltaic thermal module.

A unified global investigation on the spectral effects of soiling losses of PV glass substrates: preliminary results
Presentation / Conference Contribution
Micheli, L., Fernández, E. F., Smestad, G. P., Alrashidi, H., Sarmah, N., Sellami, N., Hassan, I. A., Kasry, A., Nofuentes, G., Sood, N., & et al. (2017, June). A unified global investigation on the spectral effects of soiling losses of PV glass substrates: preliminary results. Presented at 2017 IEEE 44th Photovoltaic Specialist Conference (PVSC), Washington, DC, USA

The present work reports on the initial results of an international collaboration aiming to investigate the spectral effects of soiling losses. Identical glass coupons have been exposed outdoors for eight weeks in different locations worldwide, and w... Read More about A unified global investigation on the spectral effects of soiling losses of PV glass substrates: preliminary results.

Access to Ubiquitous Real-Time Information by Bus Passengers in Urban Contexts
Presentation / Conference Contribution
Islam, M. F., Fonzone, A., & Fountas, G. (2021, June). Access to Ubiquitous Real-Time Information by Bus Passengers in Urban Contexts. Presented at 2021 7th International Conference on Models and Technologies for Intelligent Transportation Systems (MT-ITS), Heraklion, Greece

Due to higher smartphone uptake and Internet penetration rate, Ubiquitous Real-time Passenger Information (URTPI) has become available to and required by larger segments of the public transit passenger population. URTPI can influence perceptions rega... Read More about Access to Ubiquitous Real-Time Information by Bus Passengers in Urban Contexts.

A soft computing MPPT for PV system based on Cuckoo Search algorithm
Presentation / Conference Contribution
Ahmed, J., & Salam, Z. (2013, May). A soft computing MPPT for PV system based on Cuckoo Search algorithm. Presented at 4th International Conference on Power Engineering, Energy and Electrical Drives, Istanbul, Turkey

This paper presents a novel approach to determine the maximum power point (MPP) in Photovoltaic (PV) System using the Cuckoo Search (CS) algorithm. In CS, three samples of voltage are generated randomly over the span of the PV voltage. Based on the L... Read More about A soft computing MPPT for PV system based on Cuckoo Search algorithm.

The application of soft computing techniques to improve the performance of maximum power point tracker for PV system during partial shading
Presentation / Conference Contribution
Salam, Z., & Ahmed, J. (2014, March). The application of soft computing techniques to improve the performance of maximum power point tracker for PV system during partial shading. Presented at 2014 IEEE 8th International Power Engineering and Optimization Conference (PEOCO2014), Langkawi, Malaysia

Partial shading is a phenomenon, whereby, certain spots of the photovoltaic (PV) array are shaded, while other parts are left uniformly irradiated. It is caused by the shadow that originates from the obstruction of tall building, chimney, tree, telec... Read More about The application of soft computing techniques to improve the performance of maximum power point tracker for PV system during partial shading.

Comparative study of software and hardware solutions for partial shading in PV system
Presentation / Conference Contribution
Salam, Z., Ramli, M., & Ahmed, J. (2015, October). Comparative study of software and hardware solutions for partial shading in PV system. Presented at 2015 IEEE Conference on Energy Conversion (CENCON), Johor Bahru, Malaysia

The energy yield of the PV system is reduced significantly due to partial shading. To mitigate this problem, two approaches, namely the software and hardware solutions are introduced by many researchers. However, no effort thus far has been made to c... Read More about Comparative study of software and hardware solutions for partial shading in PV system.

Tea leaves moisture prediction using one-port monopole sensor
Presentation / Conference Contribution
Ling, J., Then, Y., You, K., Ahmed, J., & Zaidel, D. (2017, November). Tea leaves moisture prediction using one-port monopole sensor. Presented at 2017 IEEE Asia Pacific Microwave Conference (APMC), Kuala Lumpur, Malaysia

This paper presents the application of using a coaxial monopole sensor for determining and formulating the relationship between the reflection coefficient and the moisture content of tea leaves. A coaxial monopole sensor with operating frequency rang... Read More about Tea leaves moisture prediction using one-port monopole sensor.

A comprehensive review on PV configurations to maximize power under partial shading
Presentation / Conference Contribution
Kho, C. T. K., Ahmed, J., Kashem, S., & Then, Y. L. (2017, November). A comprehensive review on PV configurations to maximize power under partial shading. Presented at TENCON 2017 - 2017 IEEE Region 10 Conference, Penang, Malaysia

Partial shading is the condition where PV array experiences different level of irradiances on it which results significant reduction in output power. To handle that issue, PV modules are connected in various configurations as reported in the literatu... Read More about A comprehensive review on PV configurations to maximize power under partial shading.

An experimental study of the amphibious robot inspired by biological duck foot
Presentation / Conference Contribution
Kashem, S. B. A., Jawed, S., Ahmed, J., & Iqbal, A. (2018, April). An experimental study of the amphibious robot inspired by biological duck foot. Presented at 2018 IEEE 12th International Conference on Compatibility, Power Electronics and Power Engineering (CPE-POWERENG 2018), Doha, Qatar

A lot of issues are faced in the exploration due to complexity of terrain and/or unexpected environment, due to which many places are left unmapped. The aim of this project is to design and develop an amphibious robot which uses webbed duck feet desi... Read More about An experimental study of the amphibious robot inspired by biological duck foot.

A Game-Based Approach for Hemiplegia Lower Limb Rehabilitation
Presentation / Conference Contribution
Gian, K. S. M., Then, Y. L., Tay, F. S., Ahmed, J., & Vithanawasam, C. K. (2018, July). A Game-Based Approach for Hemiplegia Lower Limb Rehabilitation. Presented at 2018 2nd International Conference on BioSignal Analysis, Processing and Systems (ICBAPS), Kuching, Malaysia

Hemiplegia is paralysis which occurs on one half of the body. Rehabilitation for hemiplegic patients, in order to prevent muscle degeneration from prolonged under-usage, can be boring as it requires the same movements to be performed repeatedly. This... Read More about A Game-Based Approach for Hemiplegia Lower Limb Rehabilitation.

Mitigating the effect of partial shading by triple-tied configuration of PV modules
Presentation / Conference Contribution
Kho, C. T. K., Ahmed, J., Then, Y. L., & Kermadi, M. (2018, October). Mitigating the effect of partial shading by triple-tied configuration of PV modules. Presented at 2018 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC), Kota Kinabalu, Malaysia

Partial shading is the phenomenon, which occurs when PV modules receive irregular irradiance on a PV array. Due to that, shaded PV modules are bypassed by diodes and significant reduction in power is experienced. To counter such problem, PV modules a... Read More about Mitigating the effect of partial shading by triple-tied configuration of PV modules.

Study of electric field distribution in the high voltage stator bar insulation in presence of different shapes, locations and sizes of cavities
Presentation / Conference Contribution
Chee, D. T. Y., Nabipour-Afrouzi, H., Malek, Z. A., Mehranzamir, K., & Ahmed, J. (2019, June). Study of electric field distribution in the high voltage stator bar insulation in presence of different shapes, locations and sizes of cavities. Presented at International Conference of Electrical and Electronic Engineering (ICon3E 2019), Putrajaya, Malaysia

The insulation system represents one of the most critical elements in any high voltage equipment, inclusive of any cabling and machineries. 60% of the faults and errors occurred in the insulation system are due to partial discharge occurrence which d... Read More about Study of electric field distribution in the high voltage stator bar insulation in presence of different shapes, locations and sizes of cavities.

Optimization Analysis of Hybrid Renewable Energy System Using Homer Software for Rural Electrification in Sarawak
Presentation / Conference Contribution
Hada, N., Nabipour-Afrouzi, H., Kieh, T. S., Mehranzamir, K., Ahmed, J., & Wooi, C.-L. (2019, August). Optimization Analysis of Hybrid Renewable Energy System Using Homer Software for Rural Electrification in Sarawak. Presented at 2019 International UNIMAS STEM 12th Engineering Conference (EnCon), Kuching, Malaysia

This research focuses on the design and optimization of a hybrid renewable energy system for the generation of electricity in a rural area in Sarawak, Malaysia. The investigated system consists of the combination of Solar and Biomass energy integrate... Read More about Optimization Analysis of Hybrid Renewable Energy System Using Homer Software for Rural Electrification in Sarawak.