Browsing by Author "Tekin, Ahmet"
Now showing items 1-20 of 39
-
16-elements helical antenna system integration with a solar cell powered IoT collector
Ullah, Naveed; Tekin, Ahmet (IEEE, 2019)An 868MHz-915MHz 16-elements helical wire antenna array design with a solar-cell integration is presented. Each element is designed to be omni-directional with the corresponding tuning stubs and ground substrate. This is ... -
A 1GS/S, 9-BIT DAC I interleaved (2+1)-bit then 2-bit per cycle, reference free SAR ADC
El-Sawy, Salma H. (2019-01-02)This work presents a high speed, medium resolution Successive Approximation Register Analog to Digital Converter (SAR ADC) designed for low-noise, low- power satellite transceiver applications. The proposed system is a ... -
A 1GS/s, 9-bits DAC interleaved (2+1)-bit then 2-bit per cycle SAR ADC
El-Sawy, Salma; Tekin, Ahmet (Istanbul University, 2020-07)This paper presents a high speed Successive Approximation Register Analog to Digital Converter (SAR ADC) for low-noise low-power satellite transceiver applications. The system is a (2+1) then 2-bit per cycle SAR ADC of ... -
A4WP-QI combo system for continious wireless charging range coverage with resonance filtering
Sağlam, Üstün (2019-01-02)Distribution of wireless power charging field uniformly on a large area pad is critical for receivers, especially for wearable devices because of their small form factor receiver coil. Since the receiver coil size is quite ... -
Adaptive 6.78-MHz ISM band wireless charging for small form factor receivers
Abouzeid, Mohamed Osama Hussein Soliman; Tekin, Ahmet (IEEE, 2017)This paper presents a low cost wireless power transfer system tailored particularly for size limited insulation sealed wearable devices. The 5-V USB input system features a crystal oscillator as reference signal source, a ... -
Advisor: an adaptive framework for test oracle automation of visual output systems
Genç, Ahmet Esat (2019-01-10)Test oracles differentiate between the correct and incorrect system behavior. Automation of test oracles for visual output systems mainly involves image comparison, where a snapshot of the observed output during test is ... -
Channel modeling and characterization for visible light communications: indoor, vehicular and underwater channels
Miramirkhani, Farshad (2018-06)Despite the increasing attention on visible light communications (VLC) systems, there is a lack of proper visible light (VL) channel models. This is a serious concern since channel modeling is the very first step for ... -
Class E resonant converter design for LED drivers
Zengin, Ö. Ö.; Boztepe, M.; Tekin, Ahmet (IEEE, 2019-06)The LED (Light Emitting Diode) lighting technology has been becoming widespread rapidly due to having advantages such as extremely long lifetime, compact structure and very low energy consumption. In the literature, various ... -
Design and kinematics of 4- DoF multi-purpose wearable mechanical arm (MUWA) support for enhanced operation stability
Nomanfar, P.; Tekin, Ahmet; Bogosyan, S.; Şendur, Polat (IEEE, 2019)A low-cost motor-less simple wearable mechanical arm support unit is presented as a viable alternative to todays assistive exoskeleton support units. By limiting the functionality of the device to stabilization rather than ... -
Design and quantitative analysis of a pulse wave velocity blood-pressure measurement subsystem with multiple-subject controlled experiments
Erkurşun, Burcu (2018-08)The main purpose of this study is to perform the pulse wave velocity (PWV) measurements with a new noninvasive optoelectronic continuous-time wearable sensor design and analyze the quantitative relation between the reference ... -
Design and simulation of microfluidic device for metabolite screening and quantitative monitoring of drug uptake in cancer cells
Asif, Afia; Khawaldeh, S.; Khan, Muhammad Salman; Tekin, Ahmet (Sciendo, 2018)Although liquid-liquid extraction methods are currently being applied in many areas such as analytical chemistry, biochemical engineering, biochemistry, and biological applications, accessibility and usability of microfluidics ... -
The design of a high gain dual-polarized quad-ridged circular horn antenna for wideband EMC test applications
Solak, Bekir; Seçmen, M.; Tekin, Ahmet (The Applied Computational Electromagnetics Society, 2018-09)This paper presents the design of a high gain broadband quadruple-ridged circular horn antenna for Electromagnetic Compatibility (EMC) testing. The proposed antenna contains a wideband feed structure as a transition between ... -
Design of high gain wideband quad-ridged horn antenna for emc testing
Solak, Bekir (2017-06)This thesis presents a design and simulation of high gain wideband quad-ridged circular horn antenna for Electromagnetic Compatibility (EMC) testing. The selected operating frequency range of the antenna is from 1 GHz to ... -
Dopamine detection using mercaptopropionic acid and cysteamine for electrodes surface modification
Khan, Muhammad Salman; Asif, Afia; Khawaldeh, S.; Tekin, Ahmet (Sciendo, 2018)Gold electrodes are often not suitable for dopamine measurements as dopamine creates a non-conducting polymer layer on the surface of the electrodes, which leads to increased amount of electrode passivity with the gradual ... -
Dopamine detection using mercaptopropionic acid and cysteamine for electrodes surface modification
Khan, Muhammad Salman (2017-05)This research work emphasizes on main objective of dopamine detection using electrochemical detection analysis. Dopamine is an electrochemical neurotransmittor and is an essential part in human body for many decisions. It ... -
Effect of colour conversion layer on the optical and thermal efficiency of LED based liquid crystal displays
Bakan, Emrah (2018.05)In light-emitting diode (LED) lit liquid crystal displays (LCD), the colour gamut is related to the back-light unit (BLU) spectrum. The blue LED light is generally converted to green and red bands with phosphor mixtures. ... -
Energy consumption modeling and optimization of speed profile for plug-in electric vechiles
Tasooji, Tohid Kargar (2018-05)In recent years, there is a surge in research on Plug-in Electric Vehicles (PEVs), as PEVs are one of the ways that we can reduce carbon emissions. Dramatic cost reduction in PEVs has resulted in their becoming mainstream ... -
An experimental study of a bluetooth communication system for robot motion control
Dalgiç, Oğuzhan; Tekin, Ahmet; Uğurlu, Regaip Barkan (IEEE, 2019)This paper presents a method that aims to reduce the complex cabling problem in robotics applications, so as to prevent difficulties in troubleshooting processes and failures in case of cable breaks. Examples in the ... -
FOVLC: Foveation based data hiding in display transmitters for visible light communications
Yıldız, Özgür (2018-05)Visible light communications is an emerging architecture with unlicensed and huge bandwidth resources, security, and experimental implementations and standardization e orts. Display based transmitter and camera based ... -
FPGA implementation of a dense optical flow algorithm using altera OpenCL SDK
Ulutaş, Umut (2017-08)FPGA acceleration of compute-intensive algorithms is usually not regarded feasible because of the long Verilog or VHDL RTL design efforts they require. Data-parallel algorithms have an alternative platform for acceleration, ...
Share this page