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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
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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Profesör Doktor
Email Address
efe.eseller@atilim.edu.tr
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Scholarly Output
20
Articles
12
Citation Count
335
Supervised Theses
5
20 results
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Article MERAK ETTİĞİMİZ GEZEGEN “MARS” ve LAZER SPEKTROSKOPİSİ(Bilim ve Teknoloji, 2014) Eseller, Kemal Efe; Department of Electrical & Electronics EngineeringBilim insanları, evrende gerçekleşen olayları merak ettiği sürece hayatı kolaylaştıran yeni buluşlara ulaşacak ve her geçen gün bilime daha fazla katkı sağlayacaklardır. Amerikan Havacılık ve Uzay Ajansı (NASA), Mars gezegenine gönderdiği Curiosity (merak) - Rover sistemi ile gezegende çok önceden yaşamış canlı kalıntılarını (mikroplar, tek hücreli canlılar) bulabilmek için araştırmalar yapmakta ve gezegenin tarihi oluşumunu incelemektedir. Mars yüzeyinde, insanoğlu için gerekli Sülfür (S), Nitrojen (N), Oksijen (O), Fosfor (P) ve Karbon (C) gibi elementlerin varlığı ve izleri, gelecekte bu konuda yapılacak araştırma konularını şekillendirmekte ve uygun yaşam koşullarının bulunması için zemin hazırlamaktadır.Conference Object Citation Count: 0Design 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 EngineeringThe 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.Master Thesis Lıbs ile Metallerde İz Elementlerinin Saptanması(2017) Ekrım, Mohamed Lotfı; Eseller, Kemal Efe; Eseller, Kemal Efe; Eseller, Kemal Efe; Eseller, Kemal Efe; Department of Electrical & Electronics Engineering; Department of Electrical & Electronics EngineeringIz 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.Article Citation Count: 0Classification of Different Recycled Rubber-Epoxy Composite Based on Their Hardness Using Laser-Induced Breakdown Spectroscopy (libs) With Comparison Machine Learning Algorithms(Mdpi, 2023) Yilmaz, Vadi Su; Yılmaz, Vadi Su; Eseller, Kemal Efe; Aslan, Ozgur; Aslan, Özgür; Bayraktar, Emin; Eseller, Kemal Efe; Yılmaz, Vadi Su; Aslan, Özgür; Eseller, Kemal Efe; Yılmaz, Vadi Su; Aslan, Özgür; Eseller, Kemal Efe; Electrical-Electronics Engineering; Mechanical Engineering; Department of Electrical & Electronics Engineering; Department of Electrical & Electronics Engineering; Mechanical Engineering; Electrical-Electronics Engineering; Mechanical Engineering; Department of Electrical & Electronics EngineeringThis paper aims toward the successful detection of harmful materials in a substance by integrating machine learning (ML) into laser-induced breakdown spectroscopy (LIBS). LIBS is used to distinguish five different synthetic polymers where eight different heavy material contents are also detected by LIBS. Each material intensity-wavelength graph is obtained and the dataset is constructed for classification by a machine learning (ML) algorithm. Seven popular machine learning algorithms are applied to the dataset which include eight different substances with their wavelength-intensity value. Machine learning algorithms are used to train the dataset, results are discussed and which classification algorithm is appropriate for this dataset is determined.Article Citation Count: 58Analysis of Bakery Products by Laser-Induced Breakdown Spectroscopy(Elsevier Sci Ltd, 2015) Bilge, Gonca; Eseller, Kemal Efe; Boyaci, Ismail Hakki; Eseller, Kemal Efe; Tamer, Ugur; Cakir, Serhat; Department of Electrical & Electronics EngineeringIn 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.Article Citation Count: 25Determination of Ca Addition To the Wheat Flour by Using Laser-Induced Breakdown Spectroscopy (libs)(Springer, 2016) Bilge, Gonca; Eseller, Kemal Efe; Sezer, Banu; Eseller, Kemal Efe; Berberoglu, Halil; Koksel, Hamit; Boyaci, Ismail Hakki; Department of Electrical & Electronics EngineeringThe aim of the study was to determine Ca addition to the flour by using laser-induced breakdown spectroscopy (LIBS) as a quick and simple multi-elemental spectroscopy method. Different amounts of CaCO3-added wheat flour were analyzed using LIBS to determine Ca content and Ca/K ratio, which is used for discrimination of natural and Ca-added flour. LIBS spectra were quantitatively evaluated with partial least square (PLS) method as a multivariate data analysis method to eliminate the matrix effect. Ca and Ca/K calibration graphs of PLS method showed good linearity with coefficient of determinations (R (2)) 0.999. Limit of detection values for Ca and Ca/K analysis were calculated as 25.9 ppm and 0.013, respectively. Furthermore, the results were found to be consistent with the data obtained from atomic absorption spectroscopy method as a reference method for flour samples.Master Thesis El Tipi Lazer-oluşturmalı Plazma Spektroskopisi (lıbs) Aygıtı Geliştirilmesi(2021) Aktepe, Mustafa; Eseller, Kemal Efe; Eseller, Kemal Efe; Berberoğlu, Halil; Department of Electrical & Electronics EngineeringBu 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.Doctoral Thesis Lıbs Kullanılarak Matlab Temelinde İnce Filmlere Ait Yapı Analizi(2021) Azouz, Omaro A.; Eseller, Kemal Efe; Eseller, Kemal Efe; Department of Electrical & Electronics EngineeringBu 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.Article Citation Count: 81Determination of Whey Adulteration in Milk Powder by Using Laser Induced Breakdown Spectroscopy(Elsevier Sci Ltd, 2016) Bilge, Gonca; Eseller, Kemal Efe; Sezer, Banu; Eseller, Kemal Efe; Berberoglu, Halil; Topcu, Ali; Boyaci, Ismail Hakki; Department of Electrical & Electronics EngineeringA 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.Article Citation Count: 111Identification of Meat Species by Using Laser-Induced Breakdown Spectroscopy(Elsevier Sci Ltd, 2016) Bilge, Gonca; Eseller, Kemal Efe; Velioglu, Hasan Murat; Sezer, Banu; Eseller, Kemal Efe; Boyaci, Ismail Hakki; Department of Electrical & Electronics EngineeringThe aim of the present study is to identify meat speciesby using laser-induced breakdown spectroscopy (LIBS). Elemental composition differences between meat species were used for meat identification. For this purpose, certain amounts of pork, beef and chicken were collected from different sources and prepared as pellet form for LIBS measurements. The obtained LIBS spectra were evaluated with some chemometric methods, and meat species were qualitatively discriminated with principal component analysis (PCA) method with 83.37% ratio. Pork beef and chicken-beef meat mixtures were also analyzed with partial least square (PLS) method quantitatively. Determination coefficient (R-2) and limit of detection (LOD) values were found as 0.994 and 4.4% for pork adulterated beef, and 0.999 and 2.0% for chicken adulterated beef, respectively. In the light of the findings, it was seen that LIBS can be a valuable tool for quality control measurements of meat as a routine method. (C) 2016 Elsevier Ltd. All rights reserved.
