Article
Automation & Control Systems
Alejandro Gonzalez, Jose Luis Olazagoitia, Jordi Vinolas, Ibai Ulacia, Mikel Izquierdo
Summary: This article presents an innovative energy recovery shock absorber system for motorcycles, which aims to maximize energy recovery while maintaining dynamic behavior. The theoretical design, modeling, optimization, and testing process of the system are detailed. The study shows that the system can achieve significant energy recovery potential on different road profiles at various speeds.
IEEE-ASME TRANSACTIONS ON MECHATRONICS
(2022)
Article
Automation & Control Systems
Alejandro Gonzalez, Jose Luis Olazagoitia, Jordi Vinolas, Ibai Ulacia, Mikel Izquierdo
Summary: This article introduces an innovative energy recovery shock absorber system for motorcycles, named SP-EHSA, designed to maximize energy recovery without compromising dynamic behavior. The theoretical design, computer modeling, optimization, design, and testing of the system are presented, resulting in a validated computer model and a study of energy recovery potential and its effect on vehicle behavior.
IEEE-ASME TRANSACTIONS ON MECHATRONICS
(2022)
Review
Instruments & Instrumentation
Guobiao Hu, Lihua Tang, Junrui Liang, Chunbo Lan, Raj Das
Summary: Metamaterials and phononic crystals with artificially designed periodic microstructures have unique properties and applications in energy harvesting. The integration design strategy and manipulation of refractive index profile can enhance energy harvesting efficiency.
SMART MATERIALS AND STRUCTURES
(2021)
Article
Materials Science, Multidisciplinary
Shubhi Bansal, Christabel Choi, James Hardwick, Biswajoy Bagchi, Manish K. Tiwari, Sriram Subramanian
Summary: Conventional energy sources are depleting, and the world is seeking new green energy solutions. A specially designed metamaterial is used to increase acoustic energy harvesting efficiency. The transmissive labyrinthine acoustic metamaterial (LAM) is able to capture and amplify ultrasound, enabling high-intensity acoustic energy harvesting.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Engineering, Mechanical
Hanjie Xiao, Tianrun Li, Liang Zhang, Wei-Hsin Liao, Ting Tan, Zhimiao Yan
Summary: Piezoelectric energy harvesting technology using acoustic metamaterials improves sound energy density and conversion efficiency. A fully coupled electromechanical model is crucial for accurate prediction and optimization of sound energy harvesting based on acoustic metamaterials.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Mechanics
Mohammad Bukhari, Oumar Barry
Summary: Recent studies have shown that nonlinear metamaterials can exhibit interesting wave propagation phenomena and have potential applications in various fields. However, most of these studies are focused on mechanical metamaterials and have not explored the long-wavelength limit of nonlinear electromechanical metamaterials. This study fills this gap by investigating a metamaterial with nonlinear local electromechanical resonators and analyzing its wave characteristics using analytical and numerical methods. The findings suggest that the proposed nonlinear electromechanical metamaterial can enhance sensing capabilities and expand the operation range for electromechanical devices.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2022)
Article
Green & Sustainable Science & Technology
Ling Guo, Minfang Shi, Yajie Liu, Jun Ma, Hongyan Yang
Summary: In this paper, an excellent nanoscale solar energy absorber based on stacked bilayer nano-arrays (SBNA) structure is proposed and investigated. By introducing 1D Ti grating in the first layer nano-array, the absorptivity in the long-wavelength range is enhanced and the absorption band is much broadened. The result shows that the average absorptivity is up to 97.71% in the solar energy concentration range from 300 nm to 2500 nm.
Article
Optics
Yongchang Wu, Yue Liu, Wenzhuang Ma, Yushan Chen, Yuyao Cheng, Degui Li, Jing Liu, Yu Gu
Summary: In this study, a novel ultra-broadband absorber is proposed and analyzed, achieving an average absorbance of 98.6% in the visible to near-infrared range. The absorber consists of four thin films of SiO2, Fe, MgF2, and Cr, with an examined electromagnetic field intensity distribution and various structural parameter influences. Additionally, the absorber shows stability at large angles of incidence and polarization-independence at vertical angles, making it suitable for solar absorption applications.
Article
Chemistry, Physical
Zhaolong Wang, Yinbao Wei, Dongsheng Yang
Summary: Inspired by duckweed, a four-layer solar absorber with nanochannels is proposed and numerically studied for its effectiveness. The bioinspired absorber achieves a solar energy harvesting efficiency as high as 99.4%. The ultra-high absorption of the bioinspired absorber is achieved by the coexistence of electric and magnetic polaritons, further enhanced by the bioinspired nanochannels. The nanochannels in the absorbers function similarly to duckweed, facilitating water transport from the lower region to the heated upper surface. This study demonstrates a novel strategy for fabricating solar absorbers with simple nanostructures and bioinspired nanochannels, showcasing potential applications in efficient solar steam generation for wastewater treatment and desalination.
Article
Chemistry, Multidisciplinary
Xianchen Xu, Qian Wu, Yaokun Pang, Yuteng Cao, Yuhui Fang, Guoliang Huang, Changyong Cao
Summary: A novel multifunctional metamaterial (MFM) based on triboelectric nanogenerators (TENGs) capable of energy harvesting and vibration control is reported. The MFM can effectively power electronics and suppress low-frequency mechanical vibration. This work provides a new design and model for developing advanced smart systems used in various applications.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
Sangryun Lee, Wonjae Choi, Jeong Won Park, Dae-Su Kim, Sahn Nahm, Wonju Jeon, Grace X. Gu, Miso Kim, Seunghwa Ryu
Summary: In this study, we propose a gradient-index (GRIN) phononic crystal (PnC) design based on machine learning optimization, which achieves maximum elastic wave focusing and harvesting. By training a deep neural network (NN), new hole shapes with improved focusing performance are derived and the NN is updated through active learning. The optimized GRIN PnC design exhibits 3.06 times higher wave energy intensity compared to the conventional design and is validated through experiments.
Article
Chemistry, Physical
Zhisen Huang, Bo Wang
Summary: This study proposes a metamaterial absorber for broad-spectrum absorption under solar radiation, which has high absorption efficiency, wide absorption bandwidth, and can operate in high temperature environments. It is also insensitive to polarization and incident angles, making it highly applicable in various fields.
SURFACES AND INTERFACES
(2022)
Article
Chemistry, Analytical
Vinicius Silva Oliveira, Marcelo Miranda Camboim, Cleonilson Protasio de Souza, Bruno Alessandro Silva Guedes de Lima, Orlando Baiocchi, Hee-Seok Kim
Summary: This paper introduces a compact thermoelectric energy harvester with a solar absorber based on a new class of solid matter, quasicrystal (QC), and proposes a water-cooled heat sink to improve the temperature gradient on the TEG. The QC-based harvester outperforms traditional harvesters by achieving 28.6% more efficient energy generation and full charge of a supercapacitor around two hours earlier.
Article
Mathematics, Applied
Jian Zang, Run-Qing Cao, Ye-Wei Zhang, Bo Fang, Li-Qun Chen
Summary: The study explores a novel approach by integrating LNES and GMP for vibration isolation and energy harvesting. It demonstrates that closed detached resonance response can significantly increase the system's voltage, and the structure of the LNES-GMP affects the efficiency of vibration isolation and energy harvesting.
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
(2021)
Article
Chemistry, Physical
Wei Zhao, Nan Li, Xu Liu, Liwu Liu, Chengbin Yue, Chengjun Zeng, Yanju Liu, Jinsong Leng
Summary: This study proposes a novel design strategy for 4D printed metamaterials with programmable stiffness, based on the origami concept. The design strategy is verified through numerical simulation, theoretical analysis, and experimental tests, significantly improving mechanical programmability, shape reconfigurability, and adaptability of the structure. The 4D printed shape memory metamaterials show extraordinary potential in the field of programmable shock absorption and intelligent monitoring.
Article
Optics
Metin Sagik, Muharrem Karaaslan, Emin Unal, Oguzhan Akgol, Mehmet Bakir, Volkan Akdogan, Ersin Ozdemir, Yadgar Abdulkarim
Summary: An artificial neural network is used to design and determine the dimensions of a metamaterial structure placed on a patch antenna, improving the antenna's performance and achieving better reflection coefficient and quality factor.
OPTICAL ENGINEERING
(2021)
Article
Engineering, Multidisciplinary
Sekip Dalgac, Volkan Akdogan, Serap Kiris, Ayse Incesu, Oguzhan Akgol, Emin Unal, Mustafa Tunahan Basar, Muharrem Karaaslan
Summary: A metamaterial-based transmission line sensor was designed to determine the amount of methanol in methanol-contaminated local spirit samples both numerically and experimentally. By measuring the dielectric constants of different branded local spirit samples and observing the dielectric characteristics after adding different percentages of methanol, it was concluded that the sensor can linearly determine the methanol content.
Article
Optics
Hema O. Ali, Asaad M. Al-Hindawi, Yadgar Abdulkarim, Muharrem Karaaslan
Summary: This paper presents a new design of multiband perfect metamaterials absorber (MTMA) for operation in the frequency range of 8-12 GHz, showing good absorption performance and independence. Experimental results demonstrate that the absorber is suitable for military radar applications.
OPTICS COMMUNICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Murat Ozturk, Umur Korkut Sevim, Olcay Altintas, Emin Unal, Oguzhan Akgol, Muharrem Karaaslan, Cumali Sabah
Summary: A linear to circular polarization converter integrated in a concrete structure is proposed to address the signal transmission issues in concrete buildings. The experimental results show that the converter performs well, with operating frequencies between 6-6.5 GHz and a bandwidth of 500 MHz.
INTERNATIONAL JOURNAL OF MICROWAVE AND WIRELESS TECHNOLOGIES
(2022)
Article
Optics
Yadgar Abdulkarim, Mehmet Bakir, Ibrahim Yasar, Hasan Ulutas, Muharrem Karaaslan, Fatih Ozkan Alkurt, Cumali Sabah, Jian Dong
Summary: In this study, a novel microwave sensor based on metamaterial and dielectric material was designed and tested for the detection of milk and dairy products. The sensor showed high sensitivity and accuracy, and was applicable to various dairy products. This study has significant implications in the field of microwave metamaterial sensors.
Article
Mechanics
Selcuk Kacin, Murat Ozturk, Umur Korkut Sevim, Muharrem Karaaslan, Zafer Ozer, Oguzhan Akgol, Bayram Ali Mert, Emin Unal
Summary: This study aims to determine phononic crystals that can reduce the effects of earthquakes, construct prototypes, discuss test results numerically and experimentally, and evaluate the optimal dimensions and arrangement of periodic structures through numerical analysis to achieve a shielding effect against seismic waves.
ARCHIVE OF APPLIED MECHANICS
(2022)
Article
Materials Science, Multidisciplinary
Yadgar I. Abdulkarim, Meiyu Xiao, Halgurd N. Awl, Fahmi F. Muhammadsharif, Tingting Lang, Salah Raza Saeed, Fatih Ozkan Alkurt, Mehmet Bakir, Muharrem Karaaslan, Jian Dong
Summary: A triple band metamaterial absorber in the terahertz range has been designed and tested in this study. The absorber shows high absorptivity and sensitivity at specific frequencies, and is polarization insensitive. This design has potential importance in applications such as THz imaging, filtering, biological sensing, and optical communications.
OPTICAL MATERIALS EXPRESS
(2022)
Article
Multidisciplinary Sciences
Yadgar Abdulkarim, Fatih Ozkan Alkurt, Halgurd N. Awl, Olcay Altintas, Fahmi F. Muhammadsharif, Bhargav Appasani, Mehmet Bakir, Muharrem Karaaslan, Mohamed Taouzari, Jian Dong
Summary: A low-profile triple-band metamaterial perfect absorber utilizing an ultra-thin Zinc Selenide substrate for terahertz frequencies was proposed and shown to have highly absorptive peaks at three resonance frequencies. The design exhibited insensitivity to polarization and incident wave angles due to its symmetrical structure, and the effects of various parameters on the absorption and reflection spectra were investigated. Numerical results were validated using High-Frequency Simulation Software and the overall performance of the proposed metamaterial structure was found to be superior compared to existing literature, making it a promising candidate for applications in stealth technology, imaging, and thermal energy harvesting.
Article
Engineering, Electrical & Electronic
Gizem Altintarla, Emin Unal, Olcay Altintas, Duygu N. Gencoglan, Sule Colak, Amir H. Nazeri, Fatih Ozkan Alkurt, Muharrem Karaaslan
Summary: This paper presents the design of an 8-bit programmable digital metasurface in the frequency range of 4 to 7 GHz. A monopole antenna operating at 5 GHz is characterized using a metasurface structure as the ground plane. The metasurface structure is configured by altering the state of each unit-cell between `ON (1)' and `OFF (0)' in the coding matrix. The programmable metasurface effectively controls the electromagnetic wave in the frequency range of interest and can adjust the directivity, gain, and main lobe magnitude of the monopole antenna.
INTERNATIONAL JOURNAL OF ELECTRONICS
(2023)
Article
Geosciences, Multidisciplinary
Selcuk Kacin, Murat Ozturk, Umur Korkut Sevim, Muharrem Karaaslan, Oguzhan Akgol, Zafer Ozer, Mustafa Demirci, Emin Unal, Bayram Ali Mert, Maide Erdogan Alkurt, Fatih Ozkan Alkurt, Mustafa Tunahan Basar, Seyda Gulsum Kaya
Summary: In this study, a sinusoidal located concrete-based borehole design was proposed for seismic shielding applications. Numerical analysis demonstrated that the design has multiband blocking capability, effectively attenuating seismic wave transmission in the 1-15 Hz frequency range. Experimental measurements and simulations showed good agreement, indicating the high blocking capability of the proposed structure for seismic wave transmission.
Article
Computer Science, Information Systems
Fatih Ozkan Alkurt, Emin Unal, Merih Palandoken, Yadgar Abdulkarim, Ugur Cem Hasar, Muharrem Karaaslan
Summary: This paper presents the design of a single-fed four-faced multidirectional compact antenna for 2.45 GHz indoor wireless applications. The antenna structure, consisting of a cube and a patch antenna array, allows for radiation control in multiple directions. The use of a power dividing network and RF switches at the bottom of the cube enables selective microwave energy transfer to each individual antenna element.
Article
Chemistry, Physical
Alin Gheorghita Mazare, Yadgar Abdulkarim, Ayoub Sabir Karim, Mehmet Bakir, Mohamed Taouzari, Fahmi F. Muhammadsharif, Bhargav Appasani, Olcay Altintas, Muharrem Karaaslan, Nicu Bizon
Summary: In this study, a triple band perfect metamaterial absorber based on Pythagorean fractal geometry was proposed and analyzed for terahertz sensing applications. The design exhibited enhanced sensing performance and achieved three intensive absorption peaks within the desired frequency range. The proposed design was found to be sensitive to changes in substrate type, resonator material, substrate thickness, and refractive index of the surrounding medium. The metamaterial sensor demonstrated high sensitivity to variations in thickness at a fixed analyte refractive index, making it suitable for biomedical applications.
Article
Chemistry, Physical
Fatima-ezzahra Zerrad, Mohamed Taouzari, El Mostafa Makroum, Jamal El Aoufi, Salah D. Qanadli, Muharrem Karaaslan, Ahmed Jamal Abdullah Al-Gburi, Zahriladha Zakaria
Summary: In this paper, a wideband antenna is proposed for ultra-wideband microwave imaging applications. The antenna system provides a realized gain of 6 dBi, an efficiency of around 80% on the radiation bandwidth, and a wide impedance bandwidth (S11 < -10 dB) of 6.3 GHz. The proposed antenna demonstrates excellent directionality and less signal distortion, making it suitable for imaging applications.
Article
Physics, Applied
Sehriban Zeybek, Yasemin Demirhan, Aileen Noori, Halime Tugay, Hakan Altan, Cumali Sabah, Gulnur Aygun, Lutfi Ozyuzer
Summary: This study investigates the use of vanadium dioxide (VO2) as a metamaterial surface or coupled with a metallic metamaterial surface in terahertz frequency range. The VO2 thin films were patterned into a unique geometry and compared with gold (Au) patterns to evaluate their performance as tunable THz filters. The results show that VO2 exhibits controllable metamaterial properties, while Au-based structures show resonant transmittance modulation with temperature changes.
MODERN PHYSICS LETTERS B
(2023)
