Hamidreza Rashidian | Electrical and Electronics Engineering | Best Researcher Award

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Mr. Hamidreza Rashidian | Electrical and Electronics Engineering | Best Researcher Award

Research fellow at Islamic Azad University in Iran.

Hamidreza Rashidian is a dedicated researcher and designer specializing in Integrated Circuits (ICs) within the domain of Electrical and Electronics Engineering. Since 2015, he has actively contributed to academic and applied research on data converters, voltage-level shifters, bandgap voltage references, and signal processing circuits. Based in Tehran, he has collaborated with academic institutions as a research and teaching assistant while also pursuing independent innovation. His work is published in high-impact journals including IEEE Transactions on Circuits and Systems II and multiple Elsevier journals. He is also a certified reviewer for top-tier journals, including Analog Integrated Circuits and Signal Processing and Scientific Reports. Known for his productivity and perseverance, Rashidian’s contributions are shaping next-generation analog and mixed-mode circuits. With a strong foundation in software tools like HSPICE and Cadence, he bridges the gap between theory and real-world circuit implementation.

Professional Profiles

   ORCID | Scopus

Strengths for the Award

1. Deep Specialization in Integrated Circuit Design:
Mr. Rashidian demonstrates a strong and focused research trajectory in the domain of electronics engineering, particularly in the design and development of Integrated Circuits (ICs). His expertise encompasses subfields such as data converters, mixed-mode ICs, RF circuits, and bandgap voltage references. His consistent engagement in IC research since 2015 reflects a matured specialization, making him a valuable contributor to this niche field.

2. Notable Publication Record in Prestigious Journals:
He has published multiple peer-reviewed papers in high-impact platforms including the IEEE Transactions on Circuits and Systems II and Elsevier journals such as Integration, the VLSI Journal, and the International Journal of Electronics and Communications. These publications highlight his ability to address complex design challenges like low-power operation, high-precision voltage references, and analog-to-digital converter (ADC) innovation.

3. Active Research Pipeline and Reviewer Contributions:
Beyond completed work, he is engaged in ongoing research, such as ADC design with time-domain latch interpolation. His role as a certified reviewer for reputable journals like Analog Integrated Circuits and Signal Processing and Scientific Reports further underlines his scholarly competence and recognition in the academic community.

4. Integration of Academia and Independent Innovation:
He maintains roles both as a university-affiliated research assistant and as a self-employed circuit designer and lecturer. This dual involvement ensures that his work is not only academically rigorous but also technically applied and entrepreneurial in nature.

Education 

Hamidreza Rashidian holds three progressive degrees in Electrical and Electronics Engineering. He earned his Master’s degree from Islamic Azad University in Tehran in 2015, where he focused on the design and simulation of a low-power FinFET-based operational amplifier. Prior to that, he completed his Bachelor’s in Electronic Technology Engineering at Ghiaseddin Jamshid Kashani University in 2013, where he developed a scientific calculator using AVR microcontroller technology. His academic journey began with an Associate degree in Electricity-Electronics at the same institution, giving him a strong practical and theoretical base early in his career. His academic projects demonstrate a consistent focus on circuit-level innovation and microcontroller applications. These academic milestones have provided a robust foundation for his research in analog IC design and mixed-mode systems.

Research Focus 

Rashidian’s research primarily centers on the design of low-power, high-precision analog and mixed-signal integrated circuits. His technical interests include bandgap voltage references, voltage-level shifters, analog-to-digital converters, and signal-processing circuits. He investigates techniques to minimize power consumption and temperature drift in IC components, which is crucial for modern-day sensor systems and portable electronics. One of his significant contributions is the development of curvature-compensated bandgap reference circuits, which enhance accuracy across temperature ranges. His ongoing work on flash ADCs with time-domain latch interpolation exemplifies his commitment to advancing speed and efficiency in data conversion. He also explores RF ICs and VLSI design methodologies, making use of tools like HSPICE, Cadence, and MATLAB. Rashidian’s research contributes directly to the development of next-generation semiconductor devices used in IoT, medical instrumentation, and wireless systems.

Publication Top Notes

1. A 38.5-fJ 14.4-ns Robust and Efficient Subthreshold-to-Suprathreshold Voltage-Level Shifter Comprising Logic Mismatch-Activated Current Control Circuit
Published in: IEEE Transactions on Circuits and Systems II, 2023
Summary:
This paper presents a highly energy-efficient voltage-level shifter that operates reliably under subthreshold supply conditions. The design utilizes a logic mismatch-activated current control circuit to achieve robust transition characteristics, boasting energy consumption as low as 38.5 femtojoules and a delay of just 14.4 nanoseconds. It is ideal for ultra-low-power applications and supports wide voltage domain integration.

2. A Sub-1 ppm/°C Dual-Reference Small-Area Bandgap Reference Comprising an Enhanceable Piecewise Curvature Compensation Circuit
Published in: Elsevier International Journal of Electronics and Communications, 2024
Summary:
This study introduces a dual-reference bandgap voltage reference (BGR) that achieves exceptional temperature stability (less than 1 ppm/°C) using a novel curvature compensation scheme. The circuit architecture enables compact layout and enhances reliability, making it suitable for precision analog sensors and battery-powered devices.

3. A 75.12-nW 0.5-V MOS-Based BGR Comprising a Curvature Compensation Circuit for Analog-to-Digital Converter Applications
Published in: Elsevier International Journal of Electronics and Communications, 2025
Summary:
Targeting ultra-low-power applications, this work designs a MOS-based bandgap reference consuming only 75.12 nW at 0.5 V. Enhanced curvature compensation maintains accuracy, providing a reference for power-constrained ADC circuits in biomedical and IoT devices.

4. A 2.69-ppm/°C Curvature-Compensated BJT-Based Bandgap Voltage Reference
Published in: Elsevier Integration, the VLSI Journal, 2025
Summary:
This paper advances BJT-based voltage reference designs by achieving 2.69 ppm/°C thermal stability. The approach integrates curvature compensation and circuit-level innovations to ensure performance under wide temperature variations, addressing key challenges in precision analog design.

5. A 0.45-V Supply, 22.77-nW Resistor-Less Switched-Capacitor Bandgap Voltage Reference
Published in: Elsevier Computers and Electrical Engineering Journal, 2025
Summary:
This resistor-less switched-capacitor BGR operates at ultra-low supply voltages (0.45 V) and consumes only 22.77 nW. It removes passive resistors entirely, improving integration efficiency and size reduction for system-on-chip (SoC) designs.

Conclusion

Mr. Hamidreza Rashidian is a highly dedicated and technically competent researcher in the field of analog and mixed-signal integrated circuits. His scholarly contributions through peer-reviewed journals, active teaching roles, and independent research initiatives demonstrate the hallmarks of a committed and impactful researcher. With continued international engagement and further innovation in high-impact areas, he stands as a strong candidate for the Best Researcher Award.

Jack Mathebula | Planning and Operations | Best Researcher Award

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Mr. Jack Mathebula | Planning and Operations | Best Researcher Award

Research Manager, Eskom, South Africa

Jack Mathebula is a veteran energy systems strategist with over two decades of experience in power system planning, operations, and renewable energy integration. Currently serving as Acting Research Manager at Eskom RT&D, Jack leads strategic grid innovation efforts aligned with global sustainability goals. His journey began with technical roles in HVDC plant operations and evolved into thought leadership in transmission planning, capital budgeting, and smart grid transformation. Jack has authored multiple Award papers and peer-reviewed articles focusing on HVDC planning and MCDA methodologies. A recipient of several international Award honors, he has also chaired global forums and mentored young engineers across Africa. He is a registered Professional Technologist (Pr Tech Eng) and a Senior Member of SAIEE, with a growing academic profile. Jack’s work directly supports energy transition efforts in South Africa and beyond, combining academic insight with real-world applications to meet the energy challenges of tomorrow.

📘Author Profile

🎓 Education

Jack Mathebula is currently pursuing a PhD in Electrical Engineering at the University of South Africa (UNISA), building on a Cum Laude MSc from the University of Pretoria (2015). His master’s thesis focused on optimizing HVDC scheme planning. He also holds a BSc Honours in Applied Sciences–Electrical from the University of Pretoria (2004), a B-Tech in Power Engineering from Technikon Pretoria (2001), and a National Diploma in Electrical Engineering from Technikon Witwatersrand (1998). His academic training blends strong theoretical knowledge with practical energy systems expertise. Jack further expanded his leadership acumen through specialized programs, including a Project Management Programme from UNISA’s School of Business Leadership and the Middle Managers Programme (MMP) via Henley Business School in collaboration with Eskom. His education reflects a lifelong dedication to combining engineering excellence with strategic project management in the energy sector.

🛠️ Experience

Jack’s career spans over 25 years at Eskom, where he has held progressively senior roles in grid planning, transmission strategy, and renewable integration. Since April 2024, he serves as Acting Research Manager (Distribution) in Eskom’s RT&D division, leading strategic energy projects and guiding national/international technical initiatives. Between 2008 and 2024, Jack was Middle Manager for Grid Planning and Operation, overseeing research portfolios and contract/resource management. Previously, he contributed to capital planning (2006–2008), network investment (2005–2006), and master planning (2000–2005). His career began in 1999 at the Apollo HVDC Converter Station, where he optimized plant performance. Jack’s career reflects deep technical competency coupled with leadership in digital transformation, grid simulation (RTDS), and policy-relevant research on EV infrastructure and hosting capacity assessments. He continues to mentor emerging engineers and drive forward-thinking energy planning initiatives.

🔬 Research Focus 

Jack Mathebula’s research concentrates on power system planning, HVDC optimization, renewable integration, and electric mobility infrastructure. He is particularly known for applying multi-criteria decision analysis (MCDA) and TOPSIS models in selecting optimal grid expansion strategies. His ongoing PhD explores advanced planning tools for dynamic energy systems under uncertainty, contributing to resilient grid development. His technical projects include hosting capacity assessments, RTDS-based simulation, and distribution-level renewable integration via DSTATCOMs. Jack is also involved in shaping EV-ready grid infrastructure and tariff structures, through cross-border collaborations with institutions like the Danish Technical University. His commitment to applied systems thinking is evident in his work linking technical feasibility, policy formulation, and national energy planning. His research is impactful not only in scholarly terms but also in operationalizing energy transition strategies for utilities and regulators.

📚 Publication Top Notes

Application of TOPSIS in Power Systems: A Review

Authors: J. Mathebula, N. Mbuli
Conference: 2024 International Conference on Electrical, Computer and Energy Engineering
Citations: 2
Summary:
This comprehensive review explores the use of the Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS) in addressing multi-criteria challenges in power systems. The paper synthesizes over a decade of applications, detailing how TOPSIS has been utilized for substation site selection, transmission route optimization, and renewable energy prioritization. It emphasizes the method’s effectiveness in quantifying trade-offs between conflicting objectives like cost, reliability, and environmental impact. The authors also discuss emerging trends such as hybrid TOPSIS models and their role in decision support systems for utilities.

Potential Factors for Multi-Criteria Evaluation of HVDC Compared to HVAC in Power Transmission

Authors: J. Mathebula, N. Mbuli
Conference: 2024 International Conference on Green Energy, Computing and Sustainable Technologies
Citations: 2
Summary:
This paper provides a structured framework for evaluating High Voltage Direct Current (HVDC) and High Voltage Alternating Current (HVAC) systems using multi-criteria analysis. Technical aspects like voltage stability, power losses, and system compatibility are considered alongside economic (CAPEX/OPEX) and environmental parameters. The study offers guidance for policymakers and transmission planners by identifying the most influential factors when choosing transmission technology for large-scale power corridors, particularly in developing countries with expanding renewable capacity.

Approach for Screening and Ranking Potential Receiving End Points in Planning New HVDC Schemes

Authors: J. Mathebula, M.N. Gitau, N. Mbuli, J.H.C. Pretorious
Conference: 2018 IEEE PES/IAS PowerAfrica
Citations: 1
Summary:
This research introduces a structured screening and ranking method to determine optimal receiving terminals for HVDC links. Using a case study in the South African grid, the authors apply decision matrix techniques based on projected load growth, geographic accessibility, system redundancy, and cost. The proposed framework supports utilities in identifying HVDC endpoints that align with long-term energy planning and enhances strategic transmission deployment in emerging economies.

Simplified Negative Load-Based Approach Versus Full HVDC Modeling in Assessing Options for the Cape Network

Authors: J. Mathebula, M.N. Gitau, N. Mbuli
Conference: 2013 13th International Conference on Environment and Electrical Engineering
Citations: 1
Summary:
This study contrasts two methodologies for evaluating HVDC implementation in the Cape region of South Africa: a simplified negative load approach and a full HVDC model. By comparing simulation results and cost-efficiency, the paper discusses the limitations and applicability of each method. The simplified model offers quicker decision support, while the full model yields greater accuracy. The work provides guidance on the trade-offs between modeling complexity and planning effectiveness in early-stage transmission projects.

Application of TOPSIS for MCDA in Power Systems: A Systematic Literature Review

Authors: J. Mathebula, N. Mbuli
Journal: Energies (2025)
Summary:
This peer-reviewed article presents a rigorous literature review of the integration of TOPSIS with multi-criteria decision analysis (MCDA) in power system engineering. Covering applications from renewable site selection to grid reinforcement prioritization, it categorizes studies by criteria sets, modeling tools, and decision contexts. The authors propose a future research agenda emphasizing the integration of real-time data, stakeholder weighting schemes, and AI-enhanced decision-making in power systems. The review positions TOPSIS as a valuable, yet underutilized, tool for navigating the complexity of modern grids.

Potential Factors for HVDC Evaluation in Selection of the Suitable Location Within HVAC System

Authors: J. Mathebula, N. Mbuli
Conference: 2024 ICECCME
Summary:
The paper investigates the suitability of integrating HVDC terminals within existing HVAC networks. Key criteria include system stability impact, proximity to generation/load centers, infrastructure compatibility, and future scalability. The study proposes a location scoring model tailored for hybrid AC-DC systems in grid modernization scenarios. Case illustrations from the South African transmission system reinforce the practical relevance of the proposed methodology, particularly for utilities preparing for high renewable penetration.

Design Options for Thermal Uprate of a Transmission Line: A Case Study in the South African Power System

Authors: J. Mathebula, N. Mbuli, S. Mushabe
Conference: 2024 International Conference on Electrical, Communication and Computer Engineering (ECCCE)
Summary:
This case study explores cost-effective design modifications to increase the thermal capacity of aging transmission lines. Options include conductor replacement, dynamic line rating, and advanced monitoring systems. Using a real-world line segment in South Africa, the paper evaluates each method based on cost, downtime, and long-term benefits. The findings aid transmission operators in choosing appropriate uprate techniques to meet increasing demand without incurring full infrastructure replacement costs.

Conclusion

Jack Mathebula is a highly suitable and deserving candidate for the Best Researcher Award, particularly in the domain of power systems, HVDC planning, and renewable energy integration. His blend of technical depth, leadership, applied research, and mentorship exemplifies the qualities of an impactful researcher driving innovation in the energy sector.