Elektrik - Elektronik Mühendisliği Bölümü / Department of Electrical & Electronics Engineering: Recent submissions
Now showing items 21-40 of 92
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A novel interference signal superposition algorithm for providing secrecy to subcarrier number modulation-based orthogonal frequency division multiplexing systems
(Transactions on Emerging Telecommunications Technologies, 2022)Orthogonal Frequency Division Multiplexing with Subcarrier Number Modulation (OFDM-SNM) is a transmission scheme that aims to convey additional data bits by exploiting the number of active subcarriers. Even though OFDM-SNM ... -
Photocatalytic degradation of bodipy dye with a shungite based PVA hydrogel under UV-light irradiation
(Proceedings of Academics World International Conference, 2022)The contamination of water with dyes is a critical problem for the environment and a great deal of research is invested to produce the novel adsorbent composites with high adsorption capacity and at the same time gaining ... -
Temperature Dependence of Emission Cross Section and Fluorescence Lifetime of Cr:Colquiriites in 78-618 K Range
(Optica Advanced Photonics Congress 2022, 2022)We have measured the temperature dependence of fluorescence lifetime and emission cross section in Cr:LiCAF, Cr:LiSGaF and Cr:LiSAF in the 78-618 K range. Our results confirm their potential as high-power ultrafast sources ... -
Temperature dependence of the emission cross-section and fluorescence lifetime in Cr:LiCAF, Cr:LiSAF, and Cr:LiSGaF between 78 K and 618 K
(2023)Cr:Colquiriites (Cr:LiCAF, Cr:LiSAF, and Cr:LiSGaF) are well-known for their broad emission bands in the near-infrared region. Unfortunately, due to their relatively weak thermomechanical strength, average powers from ... -
Passively Q-switched Cr:LiCAF laser with a saturable Bragg reflector
(Applied Physics B: Lasers and Optics, 2021)We present a low-cost multimode diode pumped passively Q-switched Cr:LiCAF laser operating near 800 nm. AlGaAs-based saturable Bragg reflectors (SBRs) were used for passive Q-switching. The system is experimentally ... -
Broadly tunable two-color lasing of Cr:LiCAF with on-surface and off-surface optical axis birefringent filters: performance comparison
(Applied Optics, 2022)We studied the two-color lasing performance of a Cr:LiCAF laser using crystal quartz on-surface and off-surface optical axis birefringent filters (BRFs). Four different on-surface optical axis BRFs with thicknesses of 2 ... -
An organic-based hybrid hydrogels: its preperation method, structural investigation, and lanthanum uptake
(International AEGEAN Conferences on Natural & Medical Sciences-VI, 2022)Rare earth elements (REEs) have been found broad applications in superconductive materials, catalysts, magnetics, hydrogen storage materials, and rechargeable batteries. By integrating REEs into different fields, their ... -
Synthesis and characterization of Near-Infrared (NIR)-light triggerable upconverting nanoparticles to enhance activity of immobilized l-asparaginase
(4. EURASIA Biochemical Approaches & Technologies-4.EBAT Conference, 2022)In this study, PEG-L-ASNase enzyme was immobilized on UCNPs and its activity was improved by NIR. NaYF4: Yb3+, Er3+/PEI UCNPs were characterized to observe structural and morphological changes before/after enzyme immobilization. ... -
An implantable sensor for arterial pressure monitoring with minimal loading: design and finite element validation
(IEEE Sensors Conference, 2022)This paper presents an in-vivo flexible pressure sensor that can be implanted around an artery for continuous measurement of blood pressure. Currently, in-vivo arterial sensor architectures rely on circular geometries fully ... -
Bodipy photosensitizer linked hybrid nanomaterials for photodynamic therapy
(Advanced Nanomaterials Congress, 2021)Photodynamic therapy (PDT) is an alternative clinically approved treatment method to obliterate the cancerous lesion by producing reactive oxygen species (ROS) via activated photosensitizer (PS) molecule at a certain ... -
Enhancing the stability of nanotheranostic systems
(5th International Conference on Nanomedicine and Nanotechnology, 2021)Theranostics is new term which defined as a combination of therapy and diagnosis to establish a targeted drug delivery and monitoring of treatment into a single nanosystem. The most important parameter in the theranostic ... -
Cellulose acetate encapsulated upconversion nanoparticles – a novel theranostic platform
(Materials Today Communications, 2021)Luminescent upconversion nanoparticles (UCNPs) are of great interest in a wide range of nanotechnological applications, particularly in the biomedical area like imaging and therapy but their biocompatibility and stability ... -
Design and experimental validation of a stress- controlled pressure sensor for wearable pulse monitoring
(2021 IEEE International Symposium on Applications of Ferroelectrics (ISAF), 2021)This paper presents a pulse sensor design scheme with adjustable preset pressure. The design consist of two PVDF layers sandwiching a PZT layer. While PZT is used to detect the pulse vibrations, PVDF layers are employed ... -
Fluorescence quenching-based bodipy-boronic acid linked viologen dual system for potential glucose sensing applications
(Sensor Review, 2022)Purpose – The purpose of this study is to develop a non-enzymatic based glucose-sensing platform composed of Bodipy-BBV dual system which can be monitored by a photodetector under the blue LED excitation. Design/method ... -
A belt-integrated piezoelectric energy harvester for wearable electronic devices
(Ferroelectrics, 2021)This paper reports a novel piezoelectric energy harvester incorporated on a waistbelt for power generation from waist movements. The device is composed of multiple piezoelectric disks in 3 D-printed encapsulations and ... -
An acoustic blood pressure sensing scheme using time of flight and shear wave elastography techniques
(Sensors and Actuators A-Physical, 2021)A novel wearable blood pressure sensor scheme is presented. The design incorporates an array of piezoelectric transducers to transmit acoustic waves through the skin, and receive reflected echoes from an arterial wall. The ... -
Orthogonal frequency division multiplexing with subcarrier gap modulation
(IEEE 31st PIMRC'20 - Workshop on Waveform Design for Beyond 5G Communications, 2020)A new modulation scheme called orthogonal frequency division multiplexing with subcarrier gap modulation (OFDM-SGM) is proposed. The proposed scheme embeds extra information bits by exploiting the gap between the active ... -
An effective design for polar codes over multipath fading channels
(Springer, 2020-01)Polar codes, recently adopted in 5G standard due to their excellent performance at a very low complexity compared to other competitive schemes in the literature, are deemed to be a strong candidate for the Internet of ... -
OFDM-subcarrier power modulation with two dimensional signal constellations
(2019 Innovations in Intelligent Systems and Applications Conference (ASYU), 2019)An original modulation technique has been recently proposed for wireless communication systems known as OFDM- SPM (OFDM with Subcarrier Power Modulation). This technique utilizes a characteristic of the subcarriers of the ... -
Grid-based UAV placement in intelligent transportation systems
(CRC Press, 2019)Unmanned aerial vehicles (UAVs)-based projects in the smart city paradigm are no more a slim chance. Crisis reaction and coordination, open or private infrastructure control, coordination or support to astute transportation ...
