Browsing by Author "Kamberli E."

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Blood vessel segmentation and extraction using H-minima method based on image processing techniques
(2021-01-01) Boubakar Khalifa Albargathe S.M.; Kamberli E.; Kandemirli F.; Rahebi J.
In this paper, the H-minima transform is used for blood vessel segmentation. The aim of this study is to get the high accuracy of blood vessel segmentation in retinal images. In this study the good result and good performance were got. We compared our result with other methods. Also for simulation result we implemented on DRIVE and STARE database. The proposed method shows very remarkable performance on pathological retinal images. For the implementing of the proposed method MATLAB 2019a software is used. The running time of this method was 1 s for each image and the average accuracy for STARE dataset and DRIVE dataset achieved to 0.9591 and 0.9672 respectively.
Corrosion performance of electrospinning nanofiber ZnO-NiO-CuO/polycaprolactone coated on mild steel in acid solution
(2020-12-01) AlFalah M.G.K.; Kamberli E.; Abbar A.H.; Kandemirli F.; Saracoglu M.
In the present work, PCL/ZnO (polycaprolactone/ zinc oxide), PCL/NiO (polycarprolactone/nickel oxide), PCL/CuO (polycarprolactone/copper oxide), and PCL/ZnO-NiO-CuO (polycarprolactone/ zinc oxide- nickel oxide- copper oxide) have been successfully fabricated and deposited on a mild steel through electrospinning technique. SEM, EDX, and FT-IR had been used to characterize all nanofiber coatings on the mild steel. A nanofiber layer of ZnO/NiO/CuO/PCL was utilized to coating the mild steel as a corrosion protector film in 1M HCl. A series of electrochemical techniques like Open circuit potential (OCP), Electrochemical impedance spectroscopy (EIS), linear polarization resistance (LPR), and potentiodynamic polarization (PDP) were used to analyse the anti-corrosion performance of the nanofiber layer ZnO/NiO/CuO/PCL. The results showed that both anodic and cathodic reactions sharp decline with shift in corrosion potential toward a positive direction in the Tafel plots. LPR results showed that the highest protection efficiency was 94.8% with ZnO-NiO-CuO/PCL nanofiber coating. EIS spectra showed that mild steel coated with ZnO/PCL, NiO/PCL, CuO/PCL, and ZnO-NiO-CuO/PCL, realization of capacitive conduct at high frequency and coating strength at law frequency part with resistor component 474.76 ohm.cm2, 527.35 ohm.cm2, 714.73 ohm.cm2, 744.80 ohm.cm2 respectively, indicating the good barrier properties and high ohmic resistance of coatings. SEM displayed a straight, interconnected structure, relatively less porosity with uniform fibers diameter. The fibers had average diameter 429 nm, 525 nm, 639 nm, and 443 nm for ZnO/PCL, NiO/PCL, CuO/PCL, and ZnO-NiO-CuO/PCL respectively. EDX and FT-IR results confirmed the existence of ZnO, NiO, and CuO and approved the distribution into PCL matrix. Results of the present study confirmed that ZnO-NiO-CuO/PCL electrospinning nanfiber coating could be considered as a new metallic oxide nanocomposite coating for a mild steel with excellent corrosion resistance.
Simulation Study of Poly-Caprolactone, Chitosan, and Vinyl Ester Resin-coated Stainless Steel to Improve Corrosion Behavior, Bioactivity, and Biodegradability
(2023-02-15) Kamberli E.; Monajjemi M.; Kandemirli F.; Mollaamin F.
Heterogeneous materials are usually found in industrial and chemical centers, such as metallic alloy, polymer blending, porous and cracked materials, and especially composites. We exhibited expanded detailed studies on the integration of bonding between poly-caprolactone (PCL), chitosan and vinyl ester resin (VER), and stainless steel (SS) with h-BN substrates. Using h-BN dielectrics leads us towards a suitable improvement in mobility relative and increasing surface activities. Furthermore, we exhibited that the integration of h-BN with stainless steel (SS) exhibits unique advantages compared to exfoliated graphene. We offered higher resistance and anti-corrosion for stainless steel by forming these polymer layers on the surface sheet. Therefore, biopolymer strongly can be suggested as a perfect antifouling coating solution owing to its broad-spectrum antibacterial, antifungal, and anti-algal properties, along with amazing film-forming properties. Although atomic coordinates are adjusted by this work to reduce the molecular energy, conformational changes in the polymers might be considered to obtain the macromolecules pair correlation function. Gyration rays and end-to-end distance distributions of the chains have been applied to measure polymers' flexibilities quantitatively.