Aydemir, Mehmet Timur
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A.,Mehmet Timur
A., Mehmet Timur
Aydemir, Mehmet Timur
AYDEMIR, MEHMET TIMUR
Aydemir M.
MEHMET TIMUR AYDEMIR
AYDEMIR, Mehmet Timur
Mehmet Timur AYDEMIR
M. Aydemir
Mehmet Timur, Aydemir
Aydemir,Mehmet Timur
Aydemir,M.T.
Aydemir, M. T.
M. T. Aydemir
Mehmet Timur Aydemir
Aydemir, M.
Aydemir, MEHMET TIMUR
Aydemir T.
AydemIr, M. Timur
Aydemir, M.T.
Aydemir, M.Timur
Aydemir, M. Timur
A., Mehmet Timur
Aydemir, Mehmet Timur
AYDEMIR, MEHMET TIMUR
Aydemir M.
MEHMET TIMUR AYDEMIR
AYDEMIR, Mehmet Timur
Mehmet Timur AYDEMIR
M. Aydemir
Mehmet Timur, Aydemir
Aydemir,Mehmet Timur
Aydemir,M.T.
Aydemir, M. T.
M. T. Aydemir
Mehmet Timur Aydemir
Aydemir, M.
Aydemir, MEHMET TIMUR
Aydemir T.
AydemIr, M. Timur
Aydemir, M.T.
Aydemir, M.Timur
Aydemir, M. Timur
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Electrical-Electronics Engineering
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Current Staff
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Sustainable Development Goals
4
QUALITY EDUCATION
0
Research Products
6
CLEAN WATER AND SANITATION
0
Research Products
10
REDUCED INEQUALITIES
0
Research Products
13
CLIMATE ACTION
1
Research Products
14
LIFE BELOW WATER
0
Research Products
2
ZERO HUNGER
0
Research Products
8
DECENT WORK AND ECONOMIC GROWTH
0
Research Products
12
RESPONSIBLE CONSUMPTION AND PRODUCTION
0
Research Products
9
INDUSTRY, INNOVATION AND INFRASTRUCTURE
2
Research Products
17
PARTNERSHIPS FOR THE GOALS
0
Research Products
1
NO POVERTY
0
Research Products
11
SUSTAINABLE CITIES AND COMMUNITIES
1
Research Products
15
LIFE ON LAND
0
Research Products
3
GOOD HEALTH AND WELL-BEING
0
Research Products
7
AFFORDABLE AND CLEAN ENERGY
5
Research Products
5
GENDER EQUALITY
0
Research Products
16
PEACE, JUSTICE AND STRONG INSTITUTIONS
0
Research Products
Documents
72
Citations
995
h-index
14
Documents
63
Citations
761
Scholarly Output
24
Articles
16
Views / Downloads
21/0
Supervised MSc Theses
0
Supervised PhD Theses
1
WoS Citation Count
183
Scopus Citation Count
241
WoS h-index
6
Scopus h-index
8
Patents
0
Projects
0
WoS Citations per Publication
7.63
Scopus Citations per Publication
10.04
Open Access Source
9
Supervised Theses
1
| Journal | Count |
|---|---|
| Electrical Engineering | 2 |
| 2021 14th Ieee International Conference on Industry Applications (Induscon) | 1 |
| 2021 8th International Conference on Electrical and Electronics Engineering (Iceee 2021) | 1 |
| 2023 IEEE Energy Conversion Congress and Exposition, ECCE 2023 -- 2023 IEEE Energy Conversion Congress and Exposition, ECCE 2023 -- 29 October 2023 through 2 November 2023 -- Nashville -- 195932 | 1 |
| 2025 12th International Conference on Electrical and Electronics Engineering, ICEEE 2025 -- 12th International Conference on Electrical and Electronics Engineering, ICEEE 2025 -- 24 September 2025 through 26 September 2025 -- Istanbul -- 217712 | 1 |
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Article Citation - Scopus: 1A Novel Multiscale Graph Signal Processing and Network Dynamics Approach to Vibration Analysis for Stone Size Discrimination via Nonlinear Manifold Embeddings and a Convolutional Self-Attention Model(Springer Wien, 2025) Mirza, Fuat Kaan; Oz, Usame; Hekimoglu, Mustafa; Aydemir, Mehmet Timur; Pural, Yusuf Enes; Baykas, Tuncer; Pekcan, OnderUnderstanding nonlinear dynamics is critical for analyzing the hidden complexities of vibrational behavior in real-world systems. This study introduces a graph-theoretic approach to analyze the complex nonlinear temporal patterns in vibrational signals, utilizing the Tri-Axial Vibro-Dynamic Stone Classification dataset. This dataset captures high-resolution acceleration signals from controlled stone-crushing experiments, providing a unique opportunity to investigate temporal dynamics associated with distinct stone sizes. A 12-level Maximal Overlap Discrete Wavelet Transform is employed to perform multiscale signal decomposition, enabling the construction of transition graphs that encode transient and stable structural characteristics. Conceptually, transition graphs are analyzed as dynamic networks to uncover the interactions and temporal patterns embedded within vibrational signals. These networks are studied using a comprehensive suite of complexity metrics derived from information theory, graph theory, network science, and dynamical systems analysis. Metrics such as Shannon and Von Neumann's entropy evaluate signal dynamics' stochasticity and information retention. At the same time, the spectral radius measures the network's stability and structural robustness. Lyapunov exponents and fractal dimensions, informed by chaos theory and fractal geometry, further capture the degree of nonlinearity and temporal complexity. Complementing these dynamic measures, static network metrics-including the clustering coefficient, modularity, and the static Kuramoto index-offer critical discernment into the network's community structures, synchronization phenomena, and connectivity efficiency. Manifold learning techniques address the high-dimensional feature space derived from complexity metrics, with UMAP outperforming ISOMAP, Spectral Embedding, and PCA in preserving critical data structures. The reduced features are input into a convolutional self-attention model, combining localized feature extraction with long-term sequence modeling, achieving 100% classification accuracy across stone-size categories. This study presents a comprehensive framework for vibrational signal analysis, integrating multiscale graph-based representations, nonlinear dynamics quantification, and UMAP-based dimensionality reduction with a convolutional self-attention classifier. The proposed approach supports accurate classification and contributes to the development of data-driven tools for automated diagnostics and predictive maintenance in industrial and engineering contexts.Review Citation - WoS: 38Citation - Scopus: 51Inductive Power Transfer for Electric Vehicle Charging Applications: a Comprehensive Review(Mdpi, 2022) Aydin, Emrullah; Aydemir, Mehmet Timur; Aksoz, Ahmet; El Baghdadi, Mohamed; Hegazy, Omar; Baghdadi, Mohamed ElNowadays, Wireless Power Transfer (WPT) technology is receiving more attention in the automotive sector, introducing a safe, flexible and promising alternative to the standard battery chargers. Considering these advantages, charging electric vehicle (EV) batteries using the WPT method can be an important alternative to plug-in charging systems. This paper focuses on the Inductive Power Transfer (IPT) method, which is based on the magnetic coupling of coils exchanging power from a stationary primary unit to a secondary system onboard the EV. A comprehensive review has been performed on the history of the evolution, working principles and phenomena, design considerations, control methods and health issues of IPT systems, especially those based on EV charging. In particular, the coil design, operating frequency selection, efficiency values and the preferred compensation topologies in the literature have been discussed. The published guidelines and reports that have studied the effects of WPT systems on human health are also given. In addition, suggested methods in the literature for protection from exposure are discussed. The control section gives the common charging control techniques and focuses on the constant current-constant voltage (CC-CV) approach, which is usually used for EV battery chargers.Doctoral Thesis Kuantum Noktalarına Dayalı Enerji Verimli Elektronik Cihazlar için Nano Ölçekli Aritmetik ve Mantık Birimi Tasarımı(2025) Zohaib, Muhammad; Navimipour, Nima Jafari; Aydemir, Mehmet TimurElektronik, modern teknolojilerin temel bileşenidir ve transistörler, diyotlar, kapasitörler ve sensörler gibi basit bileşenlerin yardımıyla elektriksel bilginin iletilmesini sağlar. Akımı kontrol ederek, temel sinyal işleme fonksiyonları olan amplifikasyon, anahtarlama ve modülasyon gibi önemli işlevleri yerine getirirler. Mevcut yüksek performanslı sinyal işleme uygulamaları, bu sistemleri daha hızlı, daha küçük ve daha az enerji tüketen hale getiren malzeme bilimi ve nanoteknolojideki güncel gelişmeler sayesinde mümkün olmaktadır. Sinyal işleme, modern yaşamın birçok unsurunun telekomünikasyon, eğitim, sağlık, endüstri ve güvenlik gibi gelişiminde önemli bir etki yaratmıştır. Yarı iletken endüstrisi, sinyal işleme inovasyonunun başlıca itici gücü olup, küresel talebe yanıt olarak giderek daha sofistike elektronik cihazlar ve devreler üretmektedir. Ayrıca, merkezi işlem birimi (CPU), bilgisayarların ve tüm elektronik cihazların ve sinyal işlemenin 'beyni' olarak tanımlanır. CPU, bellek, çarpan, toplayıcı gibi hayati bileşenleri içeren kritik bir elektronik aygıttır. CPU'nun temel bileşenlerinden biri de aritmetik ve mantık birimidir (ALU); toplama, çarpma ve çıkarma gibi tüm CPU işlemleri içinde aritmetik ve mantıksal işlemleri gerçekleştirmektedir. Ancak ALU devrelerinde gecikme, kapladığı alan ve enerji tüketimi önemli parametrelerdir. Mevcut ALU tasarımları yüksek gecikme, fazla alan kullanımı ve yüksek enerji tüketimi gibi sorunlarla karşılaştığı için, yeni teknolojiye dayalı elektronik devrelerin uygulanması; mikrodenetleyiciler, mikroişlemciler ve baskılı cihazlar gibi tüm sinyal işleme aygıtlarının performansını yüksek hız ve düşük alan kullanımı ile önemli ölçüde artırabilir. Kuantum Nokta Hücreli Otomatlar (QCA), bu eksiklikleri gidermek için tüm elektronik devreler ve sinyal işleme uygulamalarında etkili bir teknolojidir. Bu teknoloji, CMOS ve VLSI gibi yerleşik teknolojilere alternatif olarak araştırılmakta olup, ultra düşük güç tüketimi, yüksek cihaz yoğunluğu, THz seviyesinde hızlı çalışma hızı ve azaltılmış devre karmaşıklığı gibi avantajlara sahiptir. Bu araştırma, gelişmiş QCA nanoteknolojisini uygulayarak mikrodenetleyiciler gibi elektronik cihazları geliştiren yenilikçi bir ALU tasarımı önermektedir. Temel amaç, QCA nanoteknolojisinin potansiyelinden tam anlamıyla yararlanan özgün bir ALU mimarisi sunmaktır. Yeni ve verimli bir yaklaşımla, temel mantık kapıları döndürülmemiş tek hücreye dayalı eş düzlemli bir düzenle ustalıkla kullanılmaktadır. Ayrıca bu çalışma, kuantum nokta hücreli otomata teknolojisinde geliştirilmiş 1-bit ve 2-bit aritmetik ve mantık birimi sunmaktadır. Önerilen tasarım; mantık işlemleri, aritmetik işlemler, tam toplayıcı (FA) tasarımı ve çoklayıcıları içermektedir. Tüm önerilen tasarımlar güçlü simülasyon aracı QCADesigner kullanılarak değerlendirilmiş ve doğrulanmıştır. Simülasyon sonuçları, önerilen ALU'nun hücre sayısı ve toplam kaplanan alan açısından en iyi tek katmanlı ve çok katmanlı önceki tasarımlara kıyasla sırasıyla %42.48 ve %64.28 oranında iyileştirme sağladığını göstermektedir.Article Citation - WoS: 19Citation - Scopus: 20A Nano-Scale Design of Arithmetic and Logic Unit for Energy-Efficient Signal Processing Devices Based on a Quantum-Based Technology(Springer, 2025) Zohaib, Muhammad; Navimipour, Nima Jafari; Aydemir, Mehmet Timur; Ahmadpour, Seyed-SajadSignal processing had a significant impact on the development of many elements of modern life, including telecommunications, education, healthcare, industry, and security. The semiconductor industry is the primary driver of signal processing innovation, producing ever-more sophisticated electronic devices and circuits in response to global demand. In addition, the central processing unit (CPU) is described as the "brain" of a computer or all electronic devices and signal processing. CPU is a critical electronic device that includes vital components such as memory, multiplier, adder, etc. Also, one of the essential components of the CPU is the arithmetic and logic unit (ALU), which executes the arithmetic and logical operations within all types of CPU operations, such as addition, multiplication, and subtraction. However, delay, occupied areas, and energy consumption are essential parameters in ALU circuits. Since the recent ALU designs experienced problems like high delay, high occupied area, and high energy consumption, implementing electronic circuits based on new technology can significantly boost the performance of entire signal processing devices, including microcontrollers, microprocessors, and printed devices, with high-speed and low occupied space. Quantum dot cellular automata (QCA) is an effective technology for implementing all electronic circuits and signal processing applications to solve these shortcomings. It is a transistor-less nanotechnology being explored as a successor to established technologies like CMOS and VLSI due to its ultra-low power dissipation, high device density, fast operating speed in THz, and reduced circuit complexity. This research proposes a ground-breaking ALU that upgrades electrical devices such as microcontrollers by applying cutting-edge QCA nanotechnology. The primary goal is to offer a novel ALU architecture that fully utilizes the potential of QCA nanotechnology. Using a new and efficient approach, the fundamental gates are skillfully utilized with a coplanar layout based on a single cell not rotated. Furthermore, this work presents an enhanced 1-bit and 2-bit arithmetic logic unit in quantum dot cellular automata. The recommended design includes logic, arithmetic operations, full adder (FA) design, and multiplexers. Using the powerful simulation tools QCADesigner, all proposed designs are evaluated and verified. The simulation outcomes indicates that the suggested ALU has 42.48 and 64.28% improvements concerning cell count and total occupied area in comparison to the best earlier single-layer and multi-layer designs.Article Solar Energy-Powered Wireless Charging System for Three-Wheeled E-Scooter Applications(Pergamon-elsevier Science Ltd, 2025) Erel, Mehmet Zahid; Ozdemir, Mehmet Akif; Aydemir, Mehmet TimurWireless power transfer (WPT) is a remarkable charging technology that addresses the range limitations and complexity of light electric vehicles. This study presents a novel approach to a solar-powered WPT system designed for three-wheeled e-scooter applications. The proposed system offers compact, lightweight, and costeffective solution with a ferrite-less structure and a series-series (SS) compensation topology, resulting in enhanced system efficiency and adaptability. The compact and efficient converters are designed to enhance performance and reduce system size. A Proportional-Integral (PI) controlled Perturb and Observe (P&O) maximum power point tracking (MPPT) method is implemented to optimize energy extraction from three solar panels. The design is validated through comprehensive simulations and demonstrates a superior dynamic response over the Incremental Conductance MPPT (ICM) method. Performance tests confirm the reliability of the experimental prototype, achieving a system efficiency of 88.5 % at 300-W output power over a 100 mm transfer distance under fully aligned condition. Comparative analyses with existing solar-powered e-cycle systems highlight the proposed design's superiority in efficiency, cost-effectiveness, and adherence to safety standards. The results indicate that the proposed design enhances sustainable urban transportation by reducing carbon emissions and decreasing reliance on fossil fuels, facilitating the wider integration of renewable energy sources.Article Citation - WoS: 2Citation - Scopus: 5Design and Implementation of a 10 Kv/10 Kw High-Frequency Center-Tapped Transformer(Springer, 2022) Rahman, Showrov; Candan, Muhammed Yusuf; Tamyurek, Bunyamin; Aydin, Emrullah; Mese, Huseyin; Aydemir, M. TimurHigh voltage high-frequency (HVHF) transformers have a crucial part in the realization of high voltage direct current (HVDC) isolated power supplies. Nevertheless, they are the bulkiest component in the system besides being one of the major contributors to the power losses. Special care is therefore required to design HVHF transformers. The main objective of this paper is to design and implement a high voltage (10 kV), high-frequency (50 kHz) center-tapped transformer with high efficiency, small size, and low cost. The proposed transformer is designed as part of a 100 kV, 10 kW DC/DC converter for supplying power to a particle accelerator. The proposed transformer steps up the input voltage (500 V) to 10 kV. Then, a five-stage full-wave Cockcroft-Walton voltage multiplier (CWVM) is used for boosting the voltage to 100 kV. A detailed step-by-step design guideline for designing an HVHF transformer is also presented. To reduce the transformer's parasitic capacitance, the secondary windings are wrapped in segments. This taken approach has been illustrated in the paper and later verified through finite element analysis (FEA). The FEA analysis shows that the transformer parasitic capacitance has reduced significantly. Following the presented design guideline, the implemented prototype transformer has been built and later tested with a single-stage CWVM. The experimental results demonstrate that the prototype transformer has successfully met the design requirements including the small size, less weight, and low-cost objectives.Review Citation - WoS: 80Citation - Scopus: 107A Comprehensive Review on Wireless Capacitive Power Transfer Technology: Fundamentals and Applications(IEEE-Inst Electrical Electronics Engineers Inc, 2022) Erel, Mehmet Zahid; Bayindir, Kamil Cagatay; Aydemir, Mehmet Timur; Chaudhary, Sanjay K.; Guerrero, Josep M.Capacitive power transfer (CPT) technology is becoming increasingly popular in various application areas. Due to its limitations, such as low frequency, low coupling capacitance, and the high voltage stress on metal plates, the studies on high power CPT applications fell behind previously. Therefore, the wideband gap (WBG) semiconductor devices and the compensation topologies are further adopted to tackle these limitations. The main purpose of the paper is to review CPT applications in terms of performance parameters, advantages, disadvantages, and also challenges. Initially, the basic principles of CPT technology are examined, which cover compensation topologies, coupler structures, transfer distance, power electronic components, and system control methods. Then, CPT applications are evaluated for performance parameters (i.e., power level, operation frequency, system efficiency, transfer distance) along with compensation types, inverter types, and coupler types. The applications are categorized into six main groups according to industrial topics as safety, consumer electronics, transport, electric machines, biomedical, and miscellaneous. Herein, power level changes from mu W to kW ranges, the operation frequency varies from 100s of kHz to 10s of MHz ranges as well. The maximum system efficiency is recorded as 97.1 %. The transfer distance varies from mu m range to 100s of mm ranges. The full-bridge inverter topology and four-plate coupler structure are noticeable in CPT applications. Finally, advantages, disadvantages, and challenges of CPT applications are evaluated in detail. This review is expected to serve as a reference for researchers who study on CPT systems and their applications.Conference Object A Modified Plate Design for Capacitive Wireless Power Transfer Systems(IEEE, 2025) Alhayek, Ahmed; Ozdemir, Mehmet Akif; Erel, Mehmet Zahid; Aydemir, Mehmet TimurThe share of capacitive wireless power transfer in recent wireless power transfer research has been increasing. The advantage of these systems mainly comes from their simple structures. The power is transferred between the plates, and there is no need for magnetic shielding as there is no magnetic field involved. The transferred energy depends on the capacitance of the plates, and increasing the effective area of the plate without changing its size can be effective. This paper proposes a simple technique to increase the effective area of plates. Basically, the effective area is increased by grooving the surface, like the fins of heat sinks. The proposed technique has been tested on a four-plate horizontal structure. The results show that the proposed method can be effective.Conference Object Design and Thermal Analysis of a High-Voltage High-Frequency Transformer(IEEE Computer Society, 2025) Shan, A.; Ozdemir, M.A.; Tamyürek, B.; Aydin, E.; Aydemir, M.T.High-voltage high-frequency (HVHF) transformers are one of the crucial components in HVDC power supplies. However, they occupy more space, and compared to other components in the system, they experience more energy losses. HVHF transformers need special attention to both thermal and electrical properties, mainly because of the use of ferrite cores. Ferrite materials show temperature-dependent properties, and transformer efficiency, reliability, and safety are enormously affected by the thermal behavior of ferrite cores. At high operating temperatures, the core performance may be reduced, leading to an increase in total losses and a decrease in the insulation life. Therefore, for optimal transformer design, it is very crucial to select an appropriate core material and predict its thermal behavior accurately. This article focuses on the thermal analysis and modeling of a 10 kVA, 500V/11 kV HVHF transformer using ANSYS simulation tools. Finite element analysis (FEA) is used to calculate the core losses and temperature distribution, enabling a deeper understanding of thermal limitations and design choices. © 2025 IEEE.Article Citation - WoS: 6Citation - Scopus: 8High-Speed and Area-Efficient Arithmetic and Logic Unit Architecture Using Quantum-Dot Cellular Automata for Digital Signal Processing(Elsevier, 2025) Zohaib, Muhammad; Navimipour, Nima Jafari; Aydemir, Mehmet Timur; Ahmadpour, Seyed-SajadSignal processing has significantly influenced our lives in many domains, including telecommunications, education, healthcare, industry, and security. The efficiency of signal processing heavily relies on the Arithmetic and Logic Unit (ALU), which stands as an essential hardware component. In addition, ALU is a fundamental part of a central processing unit (CPU), leading to fundamental operations inside the processor. However, the growing demand for small, robust hardware systems has led researchers to create nano-electronic technologies under consideration. One of the leading technologies in this field is Quantum-dot cellular automata (QCA), which demonstrates promising value as a possible alternative to complementary metal-oxide-semiconductor (CMOS) designs since it enables compact circuit designs with minimal power consumption. The existing QCA-based ALU designs face limitations in cell count density together with high occupied area and high delay, which reduces their performance for real-time signal processing. This research presents a 1-bit ALU through a QCA-optimized approach for DSP applications. QCADesigner is used to validate and verify all proposed designs. Results show a statistically significant improvement in cell count reduction of 46.84 % and a total occupied area of 64.28 % lower than the most advanced version published to date.
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