Tabak, Ahmet Fatih

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Tabak, Ahmet Fatih
A.,Tabak
A. F. Tabak
Ahmet Fatih, Tabak
Tabak, Ahmet Fatih
A.,Tabak
A. F. Tabak
Ahmet Fatih, Tabak
Tabak, A.F.
Job Title
Dr. Öğr. Üyesi
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Ahmetfatıh.tabak@khas.edu.tr
Main Affiliation
Mechatronics Engineering
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Former Staff
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11

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3

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0

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0

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2021 - 20223
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Subject: Hydrodynamic interaction

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Now showing 1 - 3 of 3
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    Citation - Scopus: 0
    Simulated Motion Control of a School of Microrobots With Random Walks
    (Institute of Electrical and Electronics Engineers Inc., 2022) Tabak, A.F.; Tabak, Ahmet Fatih; Mechatronics Engineering
    The dynamics of individual elements in a swarm moving in biological fluids is an important aspect to ascertain the effectiveness of cumulative motion control. The hydrodynamic interaction between the swarm and surrounding walls as well as between the micro-swimmers, i.e., magnetotactic bacteria, within the swarm are affected by Brownian motion. A small group of magnetically-controlled bacteria swimming in a biological fluid could be simulated in a simplified fashion to design and test controllers for addressable motion with random walks. Furthermore, the disruptive effect of the random walks might prove detrimental to the control performance. This paper showcases a simulation study of adaptive motion control for a trio of magnetotactic bacteria swimming as a group in human synovial fluid. The bacterial group is confined by the joint geometry and maneuvered by the external magnetic field of a permanent magnet positioned by an open kinematic chain. Results show that it is possible to control the yaw angle of the bacterial group while swimming under the influence of repulsive force and the Brownian noise although each swimmer follows a different path. It is further observed that, when bacteria came in contact with solid surfaces, the control algorithm could be prone to misinterpreted sensory data. © 2022 IEEE.
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    Citation - Scopus: 2
    Numerical Investigations on the Hydrodynamic Interaction between an E. Coli Minicell and a Micro Tweezers
    (Institute of Electrical and Electronics Engineers Inc., 2021) Tabak, Ahmet Fatih; Mechatronics Engineering
    The study of robotic micromanipulation is important for biomedical applications with live cells. Hydrodynamic trapping is arguably more favorable owing to the apparent lack of temperature gradients and tactile interaction. However, it offers challenges of modeling due to the complex nature of the physics governing the mechanics of trapping. This study aims to present a fully deterministic Multiphysics modeling of the hydrodynamic micro tweezers that actuated by external magnetic fields in a virtually infinite Newtonian fluid. Equation of motion is written to include all hydrodynamic interaction between the particles along with contact force. Early results dictate that it is possible to observe stable orbit for different cases although the interactions could rely on different physical phenomena in part. © 2021 IEEE.
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    Citation - Scopus: 1
    Orbital Characterization Study for the Hydrodynamic Micro Tweezers: Simulated Performance With a Passive Particle
    (Institute of Electrical and Electronics Engineers Inc., 2021) Surer, J.; Tabak, Ahmet Fatih; Duzenli, S.; Tabak, A.F.; Mechatronics Engineering
    Trapping and selecting a particle intelligently is aspired for the robotic systems in bioengineering. The key element of the process is not to damage the sample when working at a micro-scale. With physical damage, not only the sample would be lost but also the experimental measurements would be useless. The tweezer aims to capture, trapping and manipulating the micro-scale particles. Many types of research presented that there exist diverse types of tweezers which can manipulate particles to a degree. With the help of the hydrodynamic micro tweezer, the particle can be easily captured, manipulated. Furthermore, the stable trajectory of the particle can be determined thanks to the mathematical model presented here. In this paper, we investigated orbital stability and conducted characterization simulations for a hydrodynamic micro tweezers system capturing a rigid spherical particle. © 2021 IEEE.