• Multi-task learning for arousal and sleep stage detection using fully convolutional networks 

  Zan, Hasan; Yıldız, Abdulnasir (IOP Publishing, 2023)

  Objective: Sleep is a critical physiological process that plays a vital role in maintaining physical and mental health. Accurate detection of arousals and sleep stages is essential for the diagnosis of sleep disorders, as ...

• Effects of Electric Vehicles and Charging Stations on Microgrid Power Quality 

  Adak, Suleyman; Cangi, Hasan; Kaya, Rıdvan; Yılmaz, Ahmet Serdar (Gazi University Journal of Science Part A: Engineering and Innovation, 2022)

  In this study, integration of renewable energy sources and Electric Vehicles (EVs) into a micro-grid was modeled and analyzed. The microgrid is divided into four important parts; a diesel generator, acting as the base power ...

• Development software program for extraction of photovoltaic cell equivalent circuit model parameters based on the Newton–Raphson method 

  Adak, Suleyman; Cangi, Hasan; Yilmaz, Ahmet Serdar; Arifoglu, Ugur (SpringerLink, 2022)

  Finding the equivalent circuit parameters for photovoltaic (PV) cells is crucial as they are used in the modeling and analysis of PV arrays. PV cells are made of silicon. These materials have a nonlinear characteristic. ...

• Local Pattern Transformation-Based convolutional neural network for sleep stage scoring 

  Zan, Hasan; Yildiz, Abdulnasır (ScienceDirect, 2023)

  Sleep stage scoring is essential for the diagnosis and treatment of sleep disorders. However, manual sleep scoring is a tedious, time-consuming, and subjective task. Therefore, this paper proposes a novel framework based ...

• Thevenin Equivalent of Solar PV Cell Model and Maximum Power Transfer 

  Adak, Suleyman; Cangi, Hasan; Yilmaz, A. Serdar (IEEE, 2021)

  Photovoltaic (PV) is the conversion of solar energy into DC electrical energy using PV cells. In addition, solar energy is an important renewable energy source. In this study, it is proposed that Thevenin's equivalent PV ...

• Sleep arousal detection using one dimensional local binary pattern-based convolutional neural network 

  Zan, Hasan; Yıldız, Abdulnasır (IEEE, 2021)

  Sleep arousal is defined as a shift from deep sleep to light sleep or complete awakening. Arousals cause sleep deprivation by fragmenting sleep, and ultimately, many health problems. Arousals can be induced by well-studied ...

• Harmonics Mitigation of Stand-Alone Photovoltaic System Using LC Passive Filter 

  Adak, Süleyman (Journal of Electrical Engineering and Technology, 2021)

  This article investigates modeling and simulation of the off-grid photovoltaic (PV) system, and elimination of harmonic components using an LC passive filter. Pulse width modulation (PWM) inverter is used to convert the ...

• Developed analytical expression for current harmonic distortion of the PV system’s inverter in relation to the solar irradiance and temperature 

  Adak, Süleyman; Cangi, Hasan; Eid, Bilal; Serdar Yılmaz, Ahmet (Electrical Engineering, 2021)

  This paper deals with modeling and simulation of the total harmonic distortion of the current (THDI) dispatched from the inverter and connected to nonlinear load. The change of THDI was examined in relation to the ambient ...

• Classification and analysis of epileptic EEG recordings using convolutional neural network and class activation mapping 

  Zan, Hasan; Yıldız, Abdulnasir; Said, Sherif (Biomedical Signal Processing and Control, 2021)

  Electrical bio-signals have the potential to be used in different applications due to their hidden nature and their ability to facilitate liveness detection. This paper investigates the feasibility of using the Convolutional ...

• Zinc Molar Concentration Induced Structural and Optical Properties of Chemically Derived ZnS Thin Films 

  BOZ,İbrahim; GÖKTAŞ,Abdullah; TUMBUL,Ahmet; KILIÇ,Ahmet (15/12/2019)

  Chemically derived polycrystalline ZnS thin films have a profound potantial for the optoelectronic and luminescent devices. Regarding this crucial fact that the chemically grown ZnS thin films, prepared at different Zn ...

• Segmantasyon yapmadan patolojik kalp sesi kayıtlarının tespiti için bir örüntü sınıflandırma algoritması 

  Yıldız, Abdulnasır; Zan, Hasan (DÜMF Mühendislik Dergisi, 2019)

  Bu çalışmada, altı adet veri bankasından alınan kalp sesi kayıtlarına segmentasyon uygulamadan k-En Küçük Komşuluk (kNN), Destek Vektör Makinesi (DVM) ve sınıflandırıcı metotları topluluğu kullanarak sınıflandırmaya yarayan ...

• Abnormal Heart Sound Detection Using Ensemble Classifiers 

  Zan, Hasan; Yıldız, Abdulnasır (IEEE, 2018)

  Phonocardiogram is used for ambulatory diagnostic to assess health status of heart and detect cardiovascular disease. The goal of this study is to develop automatic classification method of PCG recordings collected from ...

• Physical properties of solution processable n-type Fe and Al co-doped ZnO nanostructured thin films: Role of Al doping levels and annealing 

  BOZ, İbrahim; GÖKTAŞ, Abdullah; ASLAN, Ferhat; YEŞİLATA, Bülent (ELSEVIER, 2018-03-01)

  The role of annealing temperature and Fe and Al co-doping on structural, optical, electrical and magnetic properties of solution processable ZnO thin films were investigated. ZnO:Fe thin films fixed with 2% of typical ...

• Sonlu elemanlar yöntemi kullanarak farklı tip sargılar için güç transformatörün 2B analiz sonuçlarının karşılaştırılması 

  Çeçen, Mehmet (DÜMF Mühendislik Dergisi, 2018)

  Bu çalışmada, kademeli bir güç transformatörünün sonlu elemanlar yöntemiyle 2 boyutlu (2B) simülasyon modeli tasarlanmıştır. Üç farklı tip sargının transformatörün birincil ve ikincil sargı gerilimleri, kademe gerilimleri, ...

• Design of an LLCL type filter for stand-alone PV systems’ harmonics 

  Adak, suleyman (Journal of Energy Systems, 2019-01-13)

  This paper is regarding the design, modeling and simulation for reducing harmonics with passive LLCL filter in off-grid solar system. It is desired that current and voltage waveforms are to be in the sinusoidal form during ...

• Journal of Engineering and Technology 

  Adak, suleyman (Journal of Engineering and Technology, 2018-09-29)

  The increased use of power electronic based devices and the nonlinear characteristics of circuit elements used in these devices have led to the formation of harmonic components in power systems. The stable and safe working ...

• Fotovoltaik Sistemde Bulunan Üç Seviyeli Diyot Kenetlemeli Eviricinin Çıkış Gerilimi Toplam Harmonik Distorsiyonunun Simulasyon ve Analizi 

  Adak, suleyman (BEÜ Fen Bilimleri Dergisi BEU Journal, 2016-12-26)

  R-L endüktif yükü fotovoltaik (PV) sisteme DC/DC yükseltici dönüştürücü ve tek fazlı diyot kenetlemeli evirici üzerinden bağlanılmıştır. PV sistemde kullanılan DC/DC yükseltici dönüştürücü ile DC/AC üç seviyeli diyot ...

• Doğrusal Olmayan Yüklerde Güç Faktörünün Düzeltilmesi ve Harmonik Bileşenlerin Süzülmesi 

  Adak, suleyman (Gazi Üniversitesi Fen Bilimleri Dergisi PART C: TASARIM VE TEKNOLOJİ, 2019-01-13)

  Toplam harmonik distorsiyonu özellikle güç elektronik ekipman ve doğrusal olmayan yüklerinkullanılmasından sonragüç kalitesinin önemli bir konusu oldu. Elektrik sistemlerinin arızasız ve güvenli bir şekilde çalışabilmesi, ...

• Fotovoltaik Sistemin Çıkış Gücünün Sıcaklık ve Işımaya Bağlı Matematiksel Modellemesi ve Simülasyonu 

  Süleyman, ADAK (Uluslararası Mühendislik Araştırma ve Geliştirme Dergisi, 2019-01-31)

  Fotovoltaik (FV) sistemlerin çıkış gücü güneş ışınımı ve sıcaklık değerlerine bağlıdır. Bu makalede, FV sisteminin çıkış gücünün sıcaklık ve güneş ışınımına bağlı değişimi incelenmiştir. Ayrıca, bu çalışmada FV panellerinin ...

• Effects of distributed generations' integration to the distribution networks case study of solar power plant 

  Shobole, Abdulfetah; Baysal, Mustafa; Wadi, Mohammed; Tur, Mehmet Rida (İlhami Çolak, 2017)

  All over the world, the Distributed Generations (DGs) integration to power system has increased in the recent years due to economic, environmental and technical advantages. Turkey which has the huge solar potential has ...

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