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Browsing Makale Koleksiyonu by Author "Demirkol, Aşkın"

Browsing Makale Koleksiyonu by Author "Demirkol, Aşkın"

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  • A new classification approach using discriminant functions 
    Demirkol, Aşkın; Demir, Zafer; Emre, Erol (INST INFORMATION SCIENCE, 2005)
    In this study, an approach involving new types of cost functions is given for the construction of discriminant functions. Centers of mass, not specified a priori, around feature vectors are clustered using cost function. ...
  • A system theoretic approach to array processing 
    Demirkol, Aşkın; Demir, Zafer; Erol, Emre (NATL INST OPTOELECTRONICS, 2015)
    In this paper, utilizing system theoretic concepts a sound, rigorous theory of array processing is established which leads to several new results. MUSIC, MIN-NORM, ESPRIT, and PISARENKO used for both spatial and temporal ...
  • A unifying approach to track-to-track correlation for multisensor fusion for multiple targets 
    Demirkol, Aşkın; Demir, Zafer; Emre, Erol (NATL INST OPTOELECTRONICS, 2015)
    In this paper, a global modeling approach was proposed for multi sensor fusion problems. Once the global model was investigated considering the data association and fusion, it is adapted to track to track correlation problem ...
  • Active sensor imaging by wavelet and Gabor theories 
    Demirkol, Aşkın (TAYLOR & FRANCIS LTD, 2008)
    In the present paper, two new algorithms are studied by taking advantage of time frequency analysis techniques. Wavelet and Gabor theories are applied to active imaging by sensors such as radars. This is achieved by ...
  • An ambiguity function aided target density function for radar imaging 
    R. F. Cinar; Demirkol, Aşkın; Demir, Zafer (NATL INST OPTOELECTRONICS, 2015)
    This paper investigates a new approach to target density functions for active sensor imaging. The data obtained from a phased array radar system is processed by the newly developed technique. In order to reconstruct the ...
  • Angle density functions for active sensor imaging 
    Demirkol, Aşkın; Demir, Zafer; Emre, Erol (INST ENGINEERING TECHNOLOGY-IET, 2009)
    A new target density function (TDF) is proposed for active sensor imaging. The TDF, called the angle density function, is studied by utilising the angular distribution of targets at a fixed range. Active sensor imaging ...
  • Buried underground archaeological structures investigation with electrical method: diyarbakir Ulu Mosque (Turkey) 
    Karavul, Can; Nihan Arig; T. Fikret Kurnaz; Demirkol, Aşkın (NATL INST OPTOELECTRONICS, 2015)
    The study area used as a temple during the pre-Christianity term, Mar Thoma Church after the adoption of Christianity and currently used as The Ulu Mosque. The most important feature of this mosque which has hosted many ...
  • Energy efficiency with an application container 
    Ozmen Emre Demirkol; Demirkol, Aşkın (TUBITAK SCIENTIFIC & TECHNICAL RESEARCH COUNCIL TURKEY, 2018)
    Efficient use of energy is an issue that the information technology (IT) world gives prominence to both in academia and industry. Cloud computing and the Internet of things, today's most popular subjects, make the efficient ...
  • Estimation of antioxidant activity of foods using artificial neural networks 
    Cerit, İnci; Ayse Yildirim; Uçar, Muhammed Kürşad; Demirkol, Aşkın; Coşansu Akdemir, Serap; Demirkol, Omca (VUP FOOD RESEARCH INST, BRATISLAVA, 2017)
    The aim of this study was to demonstrate that artificial neural networks (ANN) is an economical and rapid method to estimate antioxidant activity of foods. Phenolic content of different food varieties (red pepper and grape ...
  • Estimation of target density functions in time-varying environments 
    Demirkol, Aşkın; Emre, Erol (TAYLOR & FRANCIS LTD, 2011)
    In this article, two different solutions are presented to the problem of estimation of time-varying range-angle in nonstationary environments. The first one utilizes a wideband signal with a certain bandlimitedness condition ...
  • Estimation of target density functions via range-angle beamforming 
    Demirkol, Aşkın; Demir, Zafer; Emre, Erol (TAYLOR & FRANCIS LTD, 2009)
    This paper considers estimation of target density functions in 'range-angle' coordinates using two beamforming techniques. The distribution of the target densities in range-angle coordinates is estimated utilizing several ...
  • Estimation of the Presence of Coal Using ANN Method by Employing the Geophysical Log Parameters at the Soma Basin 
    Karavul, Can; Hamza Karaman; A. Serhat Demir; Demirkol, Aşkın (NATL ACAD SCIENCES INDIA, 2016)
    In this study, the feed forward, back propagation neural network model (ANN), used as one of the complex modeling systems and artificial intelligence methods, have been employed to estimate the presence of a coal layer at ...
  • International Federation for Information Processing 
    Demirkol, Aşkın; Erol, Emre (SPRINGER, 2006)
    In this paper, as an active sensor imaging technique, a new target density function in form of the range density function(RDF) is developed by Gabor transform which is called short time Fourier transform (STFT). It is shown ...
  • Investigation of structures in the Alabanda Bouleuterion by electrical resistivity method 
    Karavul, Can; Karaaslan, Hasan; Demirkol, Aşkın (SPRINGER HEIDELBERG, 2016)
    The workspace as Bouleuterion (parliament house) is located in the ancient city of Alabanda far approximately 7 km from Aydin, Cine. The works on the city plan are still continued by the Department of Archeology in Adnan ...
  • Kalman filter aided target density function for radar imaging 
    Ridvan Firat Cinar; Fatih Kocadag; Demirkol, Aşkın (INST ENGINEERING TECHNOLOGY-IET, 2019)
    This study proposes a new algorithm for air target radar imaging by taking the geometrical and processing advantages of array antenna systems. The backscattered signal is processed with a new technique to benefit the ...
  • LECTURE NOTES IN COMPUTER SCIENCE 
    Demirkol, Aşkın; Demir, Zafer; Emre, Erol (SPRINGER-VERLAG BERLIN, 2005)
    In this paper, a new Target Density Function(TDF) is theorized to image the radar targets by a new estimation algorithm. TDF is represented in a specified manner. This method is developed by inspiring of ambiguity functions. ...
  • LECTURE NOTES IN COMPUTER SCIENCE 
    Demirkol, Aşkın; Demir, Zafer; Emre, Erol (SPRINGER-VERLAG BERLIN, 2006)
    In this work, four alternative algorithms for Classification/Discrimination are described which we have developed recently. These are believed to have several advantages over the previous ones via the introduction of a new ...
  • Magnetic and electrical resistivity image survey in a buried Adramytteion ancient city in Western Anatolia, Turkey 
    Karavul, Can; Keskinsezer, Ayhan; Beyhan, Günay; Demirkol, Aşkın (ACADEMIC JOURNALS, 2010)
    This paper examines a buried Adramytteion ancient city in the Balikesir-Burhaniye-Oren district located in the Western Anatolian region of Turkey. In this research, the some ruins in Adramytteion with the different properties ...
  • Measurement of iron mass in concrete wall using ultra-wide band radar 
    Fatih Kocadag; Ridvan Firat Cinar; Demirkol, Aşkın (INST ENGINEERING TECHNOLOGY-IET, 2019)
    Here, it is aimed to measure and detect the iron mass of a concrete solid wall, column, floor by using of ultra-wide band radar. Electromagnetic waves boundary conditions, reflection, and refraction of waves that radiate ...
  • Performance Analysis of Image Reconstruction Based on Modified Radon Transform with Wavelet Transform 
    Mutia Hanum; Demirkol, Aşkın (IEEE, 2017)
    In many medical imaging modalities, image reconstruction is a key component. Radon Transform is mostly used for reconstruction due to its ability to map from the image space to line parameter space. The goal of this work ...