Outputs (69)

A Game-Based Approach for Hemiplegia Lower Limb Rehabilitation (2018)
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.

An effective hybrid maximum power point tracker of photovoltaic arrays for complex partial shading conditions (2018)
Journal Article
Kermadi, M., Salam, Z., Ahmed, J., & Berkouk, E. M. (2019). An effective hybrid maximum power point tracker of photovoltaic arrays for complex partial shading conditions. IEEE Transactions on Industrial Electronics, 66(9), 6990-7000. https://doi.org/10.1109/TIE.2018.2877202

This paper proposes an improved maximum power point tracker (MPPT) for photovoltaic (PV) system. The scheme is a hybrid between the adaptive perturb and observe and particle swarm optimization (PSO). The algorithm incorporates the search-skip-judge (... Read More about An effective hybrid maximum power point tracker of photovoltaic arrays for complex partial shading conditions.

An experimental study of the amphibious robot inspired by biological duck foot (2018)
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.

An enhanced adaptive P&O MPPT for fast and efficient tracking under varying environmental conditions (2018)
Journal Article
Ahmed, J., & Salam, Z. (2018). An enhanced adaptive P&O MPPT for fast and efficient tracking under varying environmental conditions. IEEE Transactions on Sustainable Energy, 9(3), 1487-1496. https://doi.org/10.1109/TSTE.2018.2791968

This paper proposes an enhanced adaptive perturb and observe (EA-P&O) maximum power point tracking (MPPT) algorithm for the photovoltaic system. The objective is to mitigate the limitations of the conventional P&O namely, the steady-state oscillation... Read More about An enhanced adaptive P&O MPPT for fast and efficient tracking under varying environmental conditions.

Tea leaves moisture prediction using one-port monopole sensor (2017)
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 (2017)
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 accurate method for MPPT to detect the partial shading occurrence in a PV system (2017)
Journal Article
Ahmed, J., & Salam, Z. (2017). An accurate method for MPPT to detect the partial shading occurrence in a PV system. IEEE Transactions on Industrial Informatics, 13(5), 2151-2161. https://doi.org/10.1109/TII.2017.2703079

This paper proposes an accurate detection scheme that effectively differentiates the partial shading from the uniform change of irradiance. By doing so, it avoids the unnecessary global peak search which results in a drop of the maximum power point t... Read More about An accurate method for MPPT to detect the partial shading occurrence in a PV system.

A Modified P&O Maximum Power Point Tracking Method with Reduced Steady State Oscillation and Improved Tracking Efficiency (2016)
Journal Article
Ahmed, J., & Salam, Z. (2016). A Modified P&O Maximum Power Point Tracking Method with Reduced Steady State Oscillation and Improved Tracking Efficiency. IEEE Transactions on Sustainable Energy, 7(4), 1506-1515. https://doi.org/10.1109/TSTE.2016.2568043

This paper proposes a method to reduce the steadystate oscillation and to mitigate the probability of losing the tracking direction of the perturb and observed (P&O)-based maximum power point tracking (MPPT) for PV system. The modified scheme retains... Read More about A Modified P&O Maximum Power Point Tracking Method with Reduced Steady State Oscillation and Improved Tracking Efficiency.

Comparative study of software and hardware solutions for partial shading in PV system (2016)
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.

Partial shading in building integrated PV system: Causes, effects and mitigating techniques (2015)
Journal Article
Salam, Z., Ramli, Z., Ahmed, J., & Amjad, M. (2015). Partial shading in building integrated PV system: Causes, effects and mitigating techniques. International Journal of Power Electronics and Drive Systems, 6(4), 712-722. https://doi.org/10.11591/ijpeds.v6.i4.pp712-722

This paper is aimed to provide a holistic understanding on the issues related to partial shading: its causes, the theoretical and physical reasons behind it, its implications on the BIPV system. Furthermore the possible mitigation techniques using t... Read More about Partial shading in building integrated PV system: Causes, effects and mitigating techniques.