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Recent Submissions

Blockchain Technology in Smart City: A New Opportunity for Smart Environment and Smart Mobility
Orecchini, F.; Santiangeli, A.; Zuccari, F.; Pieroni, Alessandra; Suppa, Tiziano (2019-01-01)
The main and challenging evolutionary process that leads towards the so-called Smarter City is still represented by the optimization of the Intelligent Systems for the Quality of Life (QoL) and the Quality of Services (QoS...
Road and railway detection in SAR images using deep learning
Sen, Nigar; Olgun, Orhun; Ayhan, Oner (2019-01-01)
Detection and segmentation of motorways, railroads and other roads with similar features are significant for comprehension of both low and high resolution synthetic aperture radar (SAR) imagery. Separation of transportatio...
Resource Constrained Multi-project Scheduling: Application in Software Company
Kurt, Pelin Akyil; KEÇECİ, BARIŞ (2019-01-01)
Project scheduling is a common problem of today's companies, which have project type production system. Project scheduling is a mechanism to communicate what tasks need to get done and which organizational resources will b...
Ship detection in synthetic aperture radar (SAR) images by deep learning
Ayhan, Oner; Sen, Nigar (2019-01-01)
In this paper, we propose a Convolutional Neural Network (CNN) based method to detect ships in Synthetic Aperture Radar (SAR) images. The architecture of proposed CNN has customized parts to detect small targets. In order ...
Simulation of Voltage Sag Events in Distribution Networks and Utility-Side Mitigation Methods
Sezgin, Mustafa Selim; Polat, Onder; Yumak, Kahraman; Gül, Ömer; Atilla, Necip Erman (2017-12-02)
As industrialization and automation processes continue to expand, power quality parameters and voltage sags in particular become more important. Sensitive equipment trips due to voltage sags cause enormous financial loss i...
Radiometric Cross-calibration of Goktiirk-2 with Landsat 8
Demirhan, Ismail Hakki; Deveci, Husne Seda; Sakarya, Ufuk (2017-05-18)
Radiometric calibration studies need to be done during the life-time of a satellite. In this paper, reflectance-based cross calibration was conducted at Tuz Golu LandNet site in 2016 using Goktiirk-2 and Landsat 8 imagerie...
Distance Measurement by Phase Tracking
Dogan, Ozan; Demir, Ibrahim; Aydin, Umut (2017-05-18)
In this work, multi frequency continuous wave radar phase unwrapping and the target tracking algorithm are combined. In order to unwrap the wrapped measurement, the unwrapped range measurement or the predicted range is uti...
A Smart Meter Design and Implementation Using ZigBee Based Wireless Sensor Network in Smart Grid
BURUNKAYA, MUSTAFA; Pars, Tufan (2017-04-10)
In this paper Wireless Sensor Home Area Network (WSHAN) with ZigBee interfaced smart meter is designed and implemented. Because of the increasing demands on electricity, traditional electric grid needs to be replaced with ...
Load curve classification for the evaluation of demand side management programs
Yumak, K.; Tosun, G.; Varlik, B.; Bağrıyanık, Mustafa (2016-09-25)
The demand side management of electrical power systems is an issue of growing concern. In this study, annual load curves those have been obtained by field measurements on MV (31.5kV) feeders in an electricity distribution ...
An overview of bird related issues in electrical power systems
Polat, O.; Yumak, K.; Atilla, N. E.; Bağrıyanık, Mustafa (2016-09-25)
Power system equipments, especially overhead lines and utility poles are posing great risk to avian species. Main purpose of this paper is to draw attention of distribution companies and community on conserving bird specie...
Variations Of Choroidal And Retinal Thickness Measurements Analyzed By Enhanced Depth Imaging Optical Coherence Tomography In Uveitis
Gurses, Ozlem; Karaismailoglu, Eda (2016-09-01)
Purpose : Choroidal thickness (CT) is considered a promising parameter to monitor the severity of inflammation. We hypothesize that inflammation of the iris and ciliary body in anterior uveitis might affect the CT, and inf...
Cytotoxic dose assessment of cell stress inducers on human bone marrow mesenchymal stem cells by real-time xCELLigence impedance analysis
Aygar, S.; BALTA, GÜNAY; ÇELEBİ SALTIK, BETÜL; KILIÇ, ESRA; Cetinkaya, D. Uckan (2016-09-01)
Sakarya, Ufuk; Demirhan, Ismail Hakki; Deveci, Husne Seda; Teke, Mustafa; Demirkesen, Can; Kupcu, Ramazan; Oztoprak, A. Feray; Efendioglu, Mehmet; Simsek, F. Fehmi; Berke, Erdinc; Gurbuz, Sevgi Zubeyde (2016-07-19)
TOBITAK UZAY has conducted a research study on the use of space-based satellite resources for several aspects of agriculture. Especially, there are two precision agriculture related projects: HASSAS (Widespread application...
Karabalkan, Melike Atay; Ermis, Ercan; Oner, Mehmet (2016-05-19)
Stable output level increases the accuracy of further signal processing algorithms. So, gain control algorithms are important preprocessing steps. On the other hand, implementation of gain control algorithms vary depending...
Enhancement of Laser Damage Resistance at 1064 nm of High and Anti-Reflective Optical Multilayers by Tailoring the Electric Field Distribution and Post-Annealing
Aydogdu, G. H.; Batman, H.; Cosar, M. B.; Ozhan, A. E. S. (2016-05-13)
In this study, multilayer Ta2O5/SiO2 and HfO2/SiO2 films were deposited on glass substrates by ion beam sputtering and physical vapor deposition methods, respectively. The effect of electric field distribution and heat tre...
The Effect of the Types of Network Topologies on Non-Technical Losses in Secondary Electric Distribution Systems
Yorukoglu, Sinan; Nasibov, Fuad; Mungan, Mehmet; Bağrıyanık, Mustafa (2016-05-05)
A portion of generated electrical power is lost in transmission and distribution systems while serviced to endusers. These losses are called technical and non-technical losses in electricity distributions systems. With pri...
Graphics processing unit based next generation DDoS prevention system
Keskin, Selcuk; Erdogan, Hasan Tugrul; KOÇAK, TAŞKIN (2016-04-27)
Packet filtering is the main component of prevention systems to protect the network system of the devices against attacks. The algorithm allows the packets to access to network after passing some rules. The packets with de...
Interoperability Profiles for Disaster Management and Maritime Surveillance
Gencturk, Mert; Duro, Refiz; Kabak, Yildiray; Bozic, Bojan; Kahveci, Kubilay; Yilmaz, Burcu (2015-11-26)
Nowadays, many different Command and Control (C2) Systems and Sensor order to manage disasters effectively and achieve powerful surveillance, it is essential for C2 and Sensor Systems to cooperate and exchange timely avail...
GEOPORTAL: TUBITAK UZAY Satellite Data Processing and Sharing System
Teke, Mustafa; Tevrizoglu, Ismail; Oztoprak, Ayse Feray; Demirkesen, Can; Acikgoz, Ibrahim Serdar; Gurbuz, Sevgi Zubeyde; Kupcu, Ramazan; Avenoglu, Bulent (2015-06-19)
Over the years, rapidly developing satellite technologies have greatly increased the amount and size of data; e.g. high resolution imagery of 31 cm (e.g. World View 3) and even video. As satellites become increasingly more...
A Short Survey of Hyperspectral Remote Sensing and Hyperspectral Remote Sensing Research At TUBITAK UZAY
Sakarya, Ufuk; Teke, Mustafa; Demirkesen, Can; Haliloglu, Onur; Kozal, Ali Omer; Deveci, Husne Seda; Oztoprak, A. Feray; Toreyin, Behcet Ugur; Gurbuz, Sevgi Zubeyde (2015-06-19)
Hyperspectral remote sensing (HSRS) is becoming more and more attractive. Recent advances in sensor technologies enabled numerous applications of this imaging modality. HSRS research has been conducted at TUBITAK UZAY sinc...