• A polarization-insensitive triple-band perfect metamaterial absorber incorporating ZnSe for terahertz sensing 

  Abdulkarim, Yadgar I.; Alkurt, Fatih Özkan; Bakır, Mehmet; Awl, Halgurd N.; Muhammadsharif, Fahmi F.; Karaaslan, Muharrem; Appasani, Bhargav; Al-Badri, Khalid Saeed Lateef; Zhu, Yuanyuan; Dong, Jian (Institute of Physics, 2022)

  In this work, a triple-band polarization-insensitive metamaterial structure with perfect absorption is proposed by incorporating a zinc selenide (ZnSe) spacer. The structure was optimally designed by varying the type of ...

• Low-Cost Antenna-Array-Based Metamaterials for Non-Invasive Early-Stage Breast Tumor Detection in the Human Body 

  Hamza, Musa N.; Abdulkarim, Yadgar I.; Saeed, Salah Raza; Altıntaş, Olcay; Mahmud, Rashad H.; Appasani, Bhargav; Ravariu, Cristian (MDPI, 2022)

  Microstrip patch antennas have been used in many applications since their appearance. Despite their great promise, their narrow bandwidth and the loss at high-frequency bands have limited their usage in medical applications. ...

• Radiation pattern reconfigurable cubical antenna array for 2.45 GHz wireless communication applications 

  Alkurt, Fatih Özkan; Ünal, Emin; Palandöken, Merih; Abdulkarim, Yadgar I.; Hasar, Uğur Cem; Karaaslan, Muharrem (Springer, 2022)

  In this paper a single-fed four-faced multidirectional compact antenna is introduced for 2.45 GHz indoor wireless applications. Firstly, a slotted patch antenna is designed to operate at 2.45 GHz and its equivalent circuit ...

• Risk assessment of renewable energy and multi-carrier energy storage integrated distribution systems 

  Tuncel, Süleyman; Oskouei, Morteza Zare; Şeker, Ayşe Aybike; Gözel, Tuba; Hocaoğlu, Mehmet Hakan; Abapour, Mehdi; Mohammadi-Ivatloo, Behnam (Wiley, 2022)

  High-power renewable energy sources (RESs) are recognized as a significant trend for the development of power distribution systems in an eco-friendly manner. Due to the aging of distribution system infrastructure, many ...

• Investigation of structural, magnetic and microwave absorption properties of NixCo1-xFe2O4/Ni:ZnO (x:0.0, 0.5, and 1.0) embedded epoxy composites 

  Kıvrak, Burak; Tümen, Kutluhan Utku; Karaaslan, Muharrem; Akyol, Mustafa (Springer, 2022)

  In this study, NixCo1−xFe2O4/Ni:ZnO (x:0.0, 0.5, and 1.0) epoxy-based composite structures were manufactured by sol–gel method. The structural, morphological and magnetic characteristics were investigated using X-ray ...

• Fractal metamaterial based multiband absorber operating in 5G regime 

  Baqir, Muhammad Abuzar; Latif, H.; Altıntaş, Olcay; Akhtar, Majid Niaz; Karaaslan, Muharrem; Server, H.; Hameed, Musab; Idrees, Nazar Muhammad (Elsevier, 2022)

  Multiband absorption is the interest of the microwave communities due to several applications in sensing, filtering, and stealth. Usually, the stacking of metal and dielectric multilayered structures form a multiband ...

• Enhanced Sensing Capacity of Terahertz Triple-Band Metamaterials Absorber Based on Pythagorean Fractal Geometry 

  Mazare, Alin Gheorghita; Abdulkarim, Yadgar I.; Karim, Ayoub Sabir; Bakır, Mehmet; Taouzari, Mohamed; Muhammadsharif, Fahmi F.; Appasani, Bhargav; Altıntaş, Olcay; Karaaslan, Muharrem; Bizon, Nicu (MDPI, 2022)

  A new design of a triple band perfect metamaterial absorber based on Pythagorean fractal geometry is proposed and analyzed for terahertz sensing applications. The proposed design showed an enhanced sensing performance and ...

• Mechanisms of nonlinear optical absorption in (GeO2)1-x–(PbF2)x (0.1 ≤ x ≤ 0.3) modified germanate glasses 

  Ünlü, Bekir Asilcan; Bilir, Gökhan; Yüksek, Mustafa; Karatay, Ahmet; Yıldız, Elif Akhüseyin; Elmalı, Ayhan (Elsevier, 2022)

  The structural, optical, and nonlinear absorption properties of (GeO2)1-x–(PbF2)x (0.1 ≤ x ≤ 0.3) glasses synthesized by conventional melting and quenching technique were investigated. Bandgap energies and Urbach energies ...

• A vanadium dioxide-based metamaterial with quatrefoil and circle loaded structure on flexible polyamide substrate for terahertz applications 

  Abdulkarim, Yadgar I.; Awl, Halgurd N.; Muhammadsharif, Fahmi F.; Bakır, Mehmet; Alkurt, Fatih Özkan; Altıntaş, Olcay; Saeed, Salah Raza; Taouzari, Mohamed; Karaaslan, Muharrem; Appasani, Bhargav; Dong, Jian (Frontiers Media S.A., 2022)

  In this study, a novel broadband metamaterial (MTM) absorber is proposed, which is based on vanadium dioxide (VO2) resonators coated onto a flexible polyamide substrate. The VO2 resonator is in the form of a quatrefoil and ...

• Nonlinear optical performance and optical limiting of germanate glasses modified with PbF2 and B2O3 induced by nanosecond pulsed laser 

  Pepe, Yasemin; Bilir, Gökhan; Yüksek, Mustafa; Karatay, Ahmet; Yıldız, Elif Akhüseyin; Elmalı, Ayhan (Elsevier, 2022)

  In this work, GeO2 modified with PbF2 and B2O3 glasses were synthesized by conventional melting and quenching technique to investigate the effect of modifier network on its linear and nonlinear optical properties. Linear ...

• SLPred: a multi-view subcellular localization prediction tool for multi-location human proteins 

  Özsarı, Gökhan; Rifaioğlu, Ahmet Süreyya; Atakan, Ahmet; Tunca, Doğan; Martin, Maria Jesus; Atalay, Rengül Çetin; Atalay, Volkan (Oxford University Press, 2022)

  Accurate prediction of the subcellular locations (SLs) of proteins is a critical topic in protein science. In this study, we present SLPred, an ensemble-based multi-view and multi-label protein subcellular localization ...

• A Symmetrical Terahertz Triple-Band Metamaterial Absorber Using a Four-Capacitance Loaded Complementary Circular Split Ring Resonator and an Ultra-Thin ZnSe Substrate 

  Abdulkarim, Yadgar, I.; Alkurt, Fatih Özkan; Awl, Halgurd N.; Altıntaş, Olcay; Muhammadsharif, Fahmi F.; Appasani, Bhargav; Bakır, Mehmet; Karaaslan, Muharrem; Taouzari, Mohamed; Dong, Jian (MDPI, 2022)

  In this research work, a symmetrical four-capacitance loaded complementary circular split ring resonator is proposed, which uses an ultra-thin Zinc Selenide (ZnSe) substrate to realize a low-profile triple-band metamaterial ...

• Theoretical and experimental sensing of bone healing by microwave approach 

  Akdoğan, Volkan; Özkaner, Vedat; Alkurt, Fatih Özkan; Karaaslan, Muharrem (Wiley, 2022)

  A medical imaging system is often required to monitor bone growth or bone healing in patients. X-ray imaging method is one of the most used imaging systems but it affects human health due to the ionizing effect of X-rays ...

• 3D EM data driven surrogate based design optimization of traveling wave antennas for beam scanning in X-band: an application example 

  Belen, Aysu; Güneş, Filiz; Palandöken, Merih; Tarı, Özlem; Belen, Mehmet Ali; Mahouti, Peyman (Springer, 2022)

  In this paper, design and optimization of a microstrip elliptic traveling wave antenna (TWA) are presented for the beam scanning in X-band as an application of 3D data driven surrogate based design optimization technique. ...

• Recognizing Students and Detecting Student Engagement with Real-Time Image Processing 

  Uçar, Mustafa Uğur; Özdemir, Ersin (MDPI, 2022)

  With COVID-19, formal education was interrupted in all countries and the importance of distance learning has increased. It is possible to teach any lesson with various communication tools but it is difficult to know how ...

• Simulated and experimental studies of a multi-band symmetric metamaterial absorber with polarization independence for radar applications 

  Ali, Hema O.; Al-Hindawi, Asaad M.; Abdulkarim, Yadgar, I.; Nugoolcharoenlap, Ekasit; Tippo, Tossapol; Alkurt, Fatih Özkan; Altıntaş, Olcay; Karaaslan, Muharrem (Institute of Physics, 2022)

  We develop a simple new design for a multi-band metamaterial absorber (MTMA) for radar applications. Computer Simulation Technology (CST) Studio Suite 2018 was used for the numerical analysis and absorption study. The ...

• Improved line–line method for propagation constant measurement of reflection-asymmetric networks 

  Hasar, Uğur Cem; Öztürk, Hamdullah; Korkmaz, Hüseyin; İzgınlı, Mücahit; Karaaslan, Muharrem (Elsevier, 2022)

  A new formalism using line-line measurements is proposed to improve the accuracy of propagation constant measurement of reflection-asymmetric networks using non-calibrated scattering (S-) parameters. For this measurement, ...

• Highly sensitive metamaterial-based microwave sensor for the application of milk and dairy products 

  Abdulkarim, Yadgar I.; Bakır, Mehmet; Yaşar, İbrahim; Ulutaş, Hasan; Karaaslan, Muharrem; Alkurt, Fatih Özkan; Sabah, Cumali; Dong, Jian (Optica Publishing Group (formerly OSA), 2022)

  In this work, a novel, to the best of our knowledge, metamaterial-based microwave sensor is designed, numerically simulated, and experimentally tested for milk and dairy products in the frequency range of 8 to 9 GHz. The ...

• Novel measurement technique to detect breast tumor based on the smallest form factor of UWB patch antenna 

  Zerrad, Fatima-Ezzahra; Taouzari, Mohamed; Makroum, El Mostafa; Aoufi, Jamal; Nasraoui, Hanane; Aksoy, Fadima Gülsever; Karaaslan, Muharrem; Islam, Md Tarikul (Cambridge University Press, 2022)

  A small ultra-wideband (UWB) patch antenna for microwave breast imaging (MWI) applications is shown off in this paper. However, to improve the antenna performance relating to the bandwidth (BW), the radiating element of ...

• Accurate Modeling of Antenna Structures by Means of Domain Confinement and Pyramidal Deep Neural Networks 

  Koziel, Slawomir; Çalık, Nurullah; Mahouti, Peyman; Belen, Mehmet Ali (Institute of Electrical and Electronics Engineers Inc., 2022)

  The importance of surrogate modeling techniques has been gradually increasing in the design of antenna structures over the recent years. Perhaps the most important reason is a high cost of full-wave electromagnetic (EM) ...

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