Eseller, Kemal Efe

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Eseller, K. E.
K., Eseller
E.,Kemal Efe
Eseller, Kemal Efe
Eseller,K.E.
Kemal Efe, Eseller
K.E.Eseller
E., Kemal Efe
K.,Eseller
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efe.eseller@atilim.edu.tr
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Scholarly Output

20

Articles

12

Citation Count

335

Supervised Theses

5

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2014 - 2019112020 - 20249
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Now showing 1 - 10 of 20
  • Thumbnail Image
    Article
    Citation Count: 81
    Determination of whey adulteration in milk powder by using laser induced breakdown spectroscopy
    (Elsevier Sci Ltd, 2016) Eseller, Kemal Efe; Sezer, Banu; Eseller, Kemal Efe; Berberoglu, Halil; Topcu, Ali; Boyaci, Ismail Hakki; Department of Electrical & Electronics Engineering
    A rapid and in situ method has been developed to detect and quantify adulterated milk powder through adding whey powder by using laser induced breakdown spectroscopy (LIBS). The methodology is based on elemental composition differences between milk and whey products. Milk powder, sweet and acid whey powders were produced as standard samples, and milk powder was adulterated with whey powders. Based on LIBS spectra of standard samples and commercial products, species was identified using principle component analysis (PCA) method, and discrimination rate of milk and whey powders was found as 80.5%. Calibration curves were obtained with partial least squares regression (PLS). Correlation coefficient (R-2) and limit of detection (LOD) values were 0.981 and 1.55% for adulteration with sweet whey powder, and 0.985 and 0.55% for adulteration with acid whey powder, respectively. The results were found to be consistent with the data from inductively coupled plasma-mass spectrometer (ICP-MS) method. (C) 2016 Elsevier Ltd. All rights reserved.
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    Article
    Citation Count: 0
    Performance evaluation of self-mixing interferometer with the ceramic type piezoelectric accelerometers
    (de Gruyter Poland Sp Z O O, 2022) Eseller, Kemal Efe; Tiken, Mehmet; Eseller, Kemal Efe; Orhan, Elif; Candan, Can; Department of Electrical & Electronics Engineering
    In this article, reconstructed displacement from the self-mixing signal is compared with the displacement obtained by the ceramic shear mode design piezoelectric accelerometer. Piezoelectric accelerometers are widely accepted due to the low output noise and wide frequency range, but nevertheless it is not contact-free. Self-mixing interferometric signals due to the vibrating target on which an accelerometer is attached are acquired by an external silicon type photodetector. The laser light hits directly the accelerometer as a target which is driven by the sum of two different sinusoidal frequencies of 150 and 300 Hz with different voltage levels.
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    Book Part
    Citation Count: 3
    Food science application
    (Elsevier, 2020) Eseller, Kemal Efe; Boyaci,I.H.; Sezer,B.; Bilge,G.; Berberoglu,H.; Department of Electrical & Electronics Engineering
    One of the main issues in the food industry is to determine quality and authenticity, and to detect adulteration, which causes a great deal of concern among consumers and risk in brand reputation for manufacturers. Food quality control is a wide playing field that includes different participants such as consumers, manufacturers, legislative bodies, researchers, etc. with an individual perspective for each participant, including economic and environmental contexts. But the ultimate goal is to produce safe and healthy food products. The preferential choice of food items depends on individuals’ lifestyles, diets, health, religious beliefs, current trends, etc. This brings about the issues of accurate labeling, fair trade, and consumer's health. The analysis of food and capabilities and limitations of laser-induced breakdown spectroscopy (LIBS) on foods have been reported. This chapter provides an overview of applications on food quality and the monitoring of several foods, sampling techniques, and limitations of LIBS. © 2020 Elsevier B.V. All rights reserved.
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    Master Thesis
    LIBS ile metallerde iz elementlerinin saptanması
    (2017) Eseller, Kemal Efe; Eseller, Kemal Efe; Department of Electrical & Electronics Engineering
    Iz Elementi, belirli bir numune veya ortamda yalnızca çok küçük miktarlarda bulunan kimyasal bir elementtir. Krom, kobalt, bakır, demir, manganez, magnezyum, çinko ve canlı organizmaların bileşenleri olarak çok az miktarda bulunan diğer elementler, büyümeleri, gelişmeleri ve sağlığı için gereklidir. Bu tezde lazerle indüklenen parçalanma spektroskopisi LIBS kullanarak elementleri tespit etmek için bir deney yaptım.
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    Doctoral Thesis
    LIBS kullanılarak MATLAB temelinde ince filmlere ait yapı analizi
    (2021) Eseller, Kemal Efe; Eseller, Kemal Efe; Department of Electrical & Electronics Engineering
    Bu tezde, farklı dalga boylarında foton (ışık) salan ve NIST verileri ile karşılaştırılan, her bir numunedeki elementleri ve konsantrasyonunu belirlemek için kullanılabilir olan, numunenin belirli bir alanına lazer atışını kullanan bir tür atomik emisyon tekniği olan Lazerle indüklenmiş plazma Spektroskopisi (LIBS) yöntemi ile çalıştık. Çalışmamızda Lorentzian uyumu kullanarak tepe ve alt noktaları belirlemek için bir MATLAB kodu geliştirdik. Böylece her tepe noktasının altındaki alan yüzdesini hesaplayabilir ve sonuçları diğer yöntemlerle Origin yazılımı ve Excel kullanarak karşılaştırabildik. Her bir atış için RSD, LOD ve SNR ve gürültü dalgalanmasını hesaplanmıştır. Numune CVD ile hazırlandı ve bu çalışmada LIBS Modelini ((LPS-1064-A 50mJ) kullandık; Başlangıç Dalgaboyu 186.263 nm, Bitiş Dalgaboyu: 888.604 nm, Geçit Gecikmesi: 0.350, Geçit Genişliği (ms): 1.050 dir. Belirli bir program kullanılarak yapılan hesaplama, her tepe noktasının altındaki Alan yüzdesine ilişkin özdeş sonuçları gösterdi ve her dalga boyunda birinci ve ikinci atışta anormal tepki olmasına rağmen, foton emisyon etkisi normal hale geldi. Numune üzerinde Sn, Mg, Fe, Al, Cu, S, Si, Zn elementleri analizleri yapıldı.
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    Article
    Citation Count: 58
    Analysis of bakery products by laser-induced breakdown spectroscopy
    (Elsevier Sci Ltd, 2015) Eseller, Kemal Efe; Boyaci, Ismail Hakki; Eseller, Kemal Efe; Tamer, Ugur; Cakir, Serhat; Department of Electrical & Electronics Engineering
    In this study, we focused on the detection of Na in bakery products by using laser-induced breakdown spectroscopy (LIBS) as a quick and simple method. LIBS experiments were performed to examine the Na at 589 nm to quantify NaCl. A series of standard bread sample pellets containing various concentrations of NaCl (0.025-3.5%) were used to construct the calibration curves and to determine the detection limits of the measurements. Calibration graphs were drawn to indicate functions of NaCl and Na concentrations, which showed good linearity in the range of 0.025-3.5% NaCl and 0.01-1.4% Na concentrations with correlation coefficients (R-2) values greater than 0.98 and 0.96. The obtained detection limits for NaCl and Na were 175 and 69 ppm, respectively. Performed experimental studies showed that LIBS is a convenient method for commercial bakery products to quantify NaCl concentrations as a rapid and in situ technique. (C) 2015 Elsevier Ltd. All rights reserved.
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    Article
    Citation Count: 5
    Comparison of different calibration techniques of laser induced breakdown spectroscopy in bakery products: on NaCl measurement
    (Springer, 2021) Eseller, Kemal Efe; Eseller, Kemal Efe; Berberoglu, Halil; Sezer, Banu; Tamer, Ugur; Boyaci, Ismail Hakki; Department of Electrical & Electronics Engineering
    Laser induced breakdown spectroscopy (LIBS) is a rapid optical spectroscopy technique for elemental determination, which has been used for quantitative analysis in many fields. However, the calibration involving atomic emission intensity and sample concentration, is still a challenge due to physical-chemical matrix effect of samples and fluctuations of experimental parameters. To overcome these problems, various chemometric data analysis techniques have been combined with LIBS technique. In this study, LIBS was used to show its potential as a routine analysis for Na measurements in bakery products. A series of standard bread samples containing various concentrations of NaCl (0.025%-3.5%) was prepared to compare different calibration techniques. Standard calibration curve (SCC), artificial neural network (ANN) and partial least square (PLS) techniques were used as calibration strategies. Among them, PLS was found to be more efficient for predicting the Na concentrations in bakery products with an increase in coefficient of determination value from 0.961 to 0.999 for standard bread samples and from 0.788 to 0.943 for commercial products.
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    Master Thesis
    El tipi lazer-oluşturmalı plazma spektroskopisi (LIBS) aygıtı geliştirilmesi
    (2021) Eseller, Kemal Efe; Eseller, Kemal Efe; Berberoğlu, Halil; Department of Electrical & Electronics Engineering
    Bu tezde, makine öğrenmesi algoritmalarını kullanarak örnekleri birbirinden ayırt edebilen bir el tipi sistem geliştirdik. Bu tezin temel amacı, yüksek enerjili malzemeleri ayırt etmek için temel oluşturan bir sistem geliştirmektir. Bu sistem, C (248 nm, 1069 nm), O (777 nm, 926 nm), H (656 nm,486 nm), N (868nm, 1011 nm), San Bantları (300 nm – 650 nm) gibi element ve moleküllere sahip olan yüksek enerjili malzemeleri niteliksel ve niceliksel olarak analiz edebilir. Bu elementlerin ve moleküllerin dalga boyu bilgileri Ulusal Standartlar ve Teknoloji Enstitüsü (NIST) veri tabanından elde edilmiştir. Bu sistem, örnekleri analiz etmek ve belirlemek için makine öğrenme algoritması (Destek Vektör Makinesi/SVM) kullanır. El tipi bir sistem olarak geliştirilen bu sistem, sonuç olarak tüm kontrol, iletişim ve kullanıcı ara yüzü (UI) mekanizmaları için gömülü platformda geliştirilmiştir. Bu amaçla ST Microelectronics tarafından geliştirilen ve STM32F746ZGT6 modeli olan ARM (ARM Cortex M7) tabanlı mikro denetleyici birimi (MCU) kullanıyoruz.
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    Article
    Citation Count: 0
    Blood metal analysis of plasmas from donors with and without SARS-CoV-2 using laser-induced breakdown spectroscopy and logistic regression
    (Optica Publishing Group, 2024) Eseller, Kemal Efe; Adler, Helmar G.; Safi, Ali; Landis, Joshua E.; Pourkamali-Anaraki, Farhad; Eseller, Kemal Efe; Xia, Weiming; Department of Electrical & Electronics Engineering
    Research on the correlation between metal levels in blood and Covid-19 infection has been conducted primarily by assessing how each individual blood metal is linked to different aspects of the disease using samples from donors with various levels of severity to Covid-19 infection. Using logistics regression on LIBS spectra of plasma samples collected pre- and postCovid-19 pandemic from donors known to have developed various levels of antibodies to the SARS-Cov-2 virus, we show that relying on the levels of Na, K, and Mg together is more efficient at differentiating the two types of plasma samples than any single blood alone.
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    Conference Object
    Citation Count: 0
    Design Optimization of Cassegrain Telescope for Remote Explosive Trace Detection
    (Spie-int Soc Optical Engineering, 2017) Eseller, Kemal Efe; Eseller, K. E.; Prabhu, Radhakrishna; Department of Electrical & Electronics Engineering
    The past three years have seen a global increase in explosive-based terror attacks. The widespread use of improvised explosives and anti-personnel landmines have caused thousands of civilian casualties across the world. Current scenario of globalized civilization threat from terror drives the need to improve the performance and capabilities of standoff explosive trace detection devices to be able to anticipate the threat from a safe distance to prevent explosions and save human lives. In recent years, laser-induced breakdown spectroscopy (LIBS) is an emerging approach for material or elemental investigations. All the principle elements on the surface are detectable in a single measurement using LIBS and hence, a standoff LIBS based method has been used to remotely detect explosive traces from several to tens of metres distance. The most important component of LIBS based standoff explosive trace detection system is the telescope which enables remote identification of chemical constituents of the explosives. However, in a compact LIBS system where Cassegrain telescope serves the purpose of laser beam delivery and light collection, need a design optimization of the telescope system. This paper reports design optimization of a Cassegrain telescope to detect explosives remotely for LIBS system. A design optimization of Schmidt corrector plate was carried out for Nd:YAG laser. Effect of different design parameters was investigated to eliminate spherical aberration in the system. Effect of different laser wavelengths on the Schmidt corrector design was also investigated for the standoff LIBS system.