Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Dogan, Ramazan Ozgur(10)
- Kayikçioglu, Temel(8)
- Bingöl, Ozkan(5)
- Ekinci, Murat(5)
- Yildirim, Omer(5)
- Albayrak, Cenk(4)
- Türk, Kadir(4)
- Akpulat, Murat(3)
- Köse, Cemal(3)
- Çakmak, Recep(3)
- Altas, Ismail Hakki(2)
- Dogan, Hulya(2)
- Gedikli, Eyup(2)
- Kayikcioglu, Temel(2)
- Küçük, Mehmet Ali(2)
- Simsek, Cemaleddin(2)
- Ulutas, Guzin(2)
- Özcan, Zubeyir(2)
- Altas, Ismail H.(1)
- Altas, Ismail Hakk(1)
- Ayas, Mustafa Sinasi(1)
- Ayas, Selen(1)
- Baser, Oguzhan(1)
- Basturk, S(1)
- Bozkurt, Ferhat(1)
- Cakmak, Recep(1)
- Demir, Yasin(1)
- Ilarslan, M(1)
- Imamoglu, Mustafa Bilgehan(1)
- Ince, F(1)
- Incir, Ramazan(1)
- Kaplan, Erdar(1)
- Karakaya, Sukru(1)
- Kaya, Haydar(1)
- Kaya, Ismail(1)
- Kayikçioglu, Ilknur(1)
- Kaynak, O(1)
- Kobya, Mehmet Emin(1)
- Kul, Sibel(1)
- Küçükugurlu, Busranur(1)
Yayınlar
- BildiriYalnız künye2017Hardware Friendly Early Stopping Structure For Polar Code
Simsek, Cemaleddin; Albayrak, Cenk; Türk, Kadir
Polar code has become a major milestone in information theory field in recent times. Researchers are still observing more efficient encoding and decoding structures. In this study, a new WIB based structure is proposed which reduces the computational complexity of WIB introduced as an early termination method for BP polar decoder in literature. Both proposed and WIB methods are implemented with VHDL and hardware complexities are compared via XILINX ISE synthesis tool. Most important complexity reduction came with removing unnecessary addition operations which make early termination method possible to implement only with hit-wise logical operations. Results show that along with complexity reduction proposed approach can also acquire same performance in half time compared to previous counterpart with fewer logic gates.
- BildiriYalnız künye2017A Day Ahead Hourly Solar Radiation Forecasting by Artificial Neural Networks: A Case Study for Trabzon Province
Çevik, Sibel; Çakmak, Recep; Altas, Ismail Hakk
The integration of renewable energy sources to the electrical grid leads to some issues in the grid because of intermittent and variable characteristics of renewable energy sources such as wind and solar. It has been predicted that the solar based electricity production will has highest annual increase rate among the other renewable sources. Due to the intermittent and volatile nature of the solar energy in an electricity grid where photovoltaic systems are intensive, load planning is essential. Therefore, day ahead solar radiation forecasting will contribute to the load planning studies. Artificial neural networks are one of the methods that are applied frequently and successfully in forecasting studies. In this study, a cause effect based artificial neural network (ANN) has been designed and performed for day ahead hourly solar radiation forecasting in Trabzon province. A similar day selection algorithm has been utilized to get more accurate forecasting by the ANN. The designed ANN has been trained and tested in MATLAB simulation environment without using ready codes of MATLAB ANN toolbox. The obtained results reveal that the designed ANN forecasts the solar radiation with acceptable error for a place such as Trabzon which has rainy and cloudy weather conditions.
- BildiriYalnız künye2017Sign Alterations of LLR Values Based Early Termination Method for LT BP Decoder
Albayrak, Cenk; Simsek, Cemaleddin; Türk, Kadir
In this letter, a new early termination method is proposed for Luby transform (LT) belief propagation (BP) decoder. The proposed method is decided whether BP decoder output converges to original data bits by observing only sign alterations of log-likelihood ratio (LLR) messages in BP decoder structure. Simulation results and complexity analyzes show that proposed method has low computational complexity and small average iteration amounts compared to conventional early termination methods in literature. In addition to this, the proposed method doesn't cause any performance degradation in BP decoder. The method can be easily applied to code families which can be decoded by BP algorithm such as low density parity check (LDPC) codes, polar codes and Raptor codes.
- BildiriYalnız künye2016Remote Patient Monitoring and Electronic Health Record System Based on Web Services
Dogan, Ramazan Ozgur; Kayikçioglu, Temel
Because of the increase in the number of people, medical problems increase and chronic diseases become more common. Medical data transfer between remote patients and health center can be provided by using information technology and telemedicine. In this study a system based web services is improved to monitor chronic patient with telemedicine. The system makes health personal offer Electronic Health Recording (EHR) consisting of biological signals and physiological parameters. This study with server-client construction consists of patient monitor software, web service and an interface allowing remote health personal to access web service.
- BildiriYalnız künye2016Detecting and Classifying Dominant Crowd Movements through Particle Advection
Akpulat, Murat; Ekinci, Murat
Today, trying to understand what kind of behaviour the crowd shows by studying the data from surveillance systems is an important topic for researchers of computer vision. The aim of this study make the motion data that is at pixel level and that is obtained by optical flow method a more meaningful data set with the particle advection method. In other words, the aim is to monitor the motion data by converting the 3D optical flow data set to a 2D data set. With this respect, evaluating how the crowd motion changes throughout the video by focusing only on the moments where there is motion can be carried out easily. At the end of the study, the success of the method is presented by testing how the image acts as a dominant movement.
- BildiriYalnız künye2016An Effective Database Watermarking Method Based On Histogram of Pairs
Sahin, Yasin; Ulutas, Guzin; Imamoglu, Mustafa Bilgehan
Protecting database integrity has become a matter of increasing importance nowadays as accessing information is getting easier. Therefore, database watermarking approach to protect the integrity become an active research area. Most of the existing relational database watermarking techniques embed a generated watermark in the database. Zero watermarking is employed in the proposed technique by storing the watermark generated from the database in another medium independent from the database. In order to make the method robust to column replacement attacks, cell values are split into overlapping pairs and column number is added to pairs. The histogram of pairs is used as the watermark because any change in either a cell value or column replacement would affect the histogram. Experimental results indicate robustness to column replacement attack as well as improved processing time compared to other works reported in the literature.
- BildiriYalnız künye2016Solar Energy Potential of Eastern Black Sea Region of Turkey: A Case Study for Trabzon Province
Çakmak, Recep; Altas, Ismail Hakki
In electricity generation, there is a tendency towards renewable energy sources in order to supply the increased electricity demand and in an effort to generate electricity with less environmental damages. The Sun is a significant renewable energy source and photovoltaic (PV) panels are one of the most commonly used systems in electricity generation by utilizing solar energy. Germany is the leader country in the world in terms of installed PV watt per capita. In this paper, potential of electricity generation by utilizing solar energy in Trabzon Province has been studied and compared with that of Germany. Solar energy data of Trabzon Province, which is provided from four different sources, have been presented and amount of electricity power that can be generated by PV systems in Trabzon Province have been given. By presenting the PV power plant examples from Germany, the quantity of electricity that can be generated in case of the same systems installed in Trabzon Province have been given. By analyzing the obtained data, it is aimed to create awareness about the potential of electricity generation from solar energy in Province of Trabzon in Turkey and to subvert prejudices about the solar energy potential in Eastern Black Sea Region of Turkey.
- BildiriYalnız künye2015Improvement of Palmprint Coding Techniques with Feature Descriptors
Bingöl, Ozkan; Ekinci, Murat
In recent years, biometric palmprint recognition system is one of the preferred research areas due to reach high accuracy even with the low resolution cameras. In recent studies conducted in this area, especially due to hygiene problems, images are taken in contactless and unrestricted environment. Despite a very successful improving methods have been developed for the images obtained in the restricted environment, shifts or projective distortions that occur in the palm pattern obtained from images taken in unconstrained environments negatively affect the success of this method. In this study, coding techniques that are commonly used palmprint recognition systems (Competitive Code, Ordinal Code, Derivative of Gaussian Filters Code) are strengthened with feature determinants (SIFT, SURF) and a new approach has been proposed. Scope of the study, a new data set consists of low-resolution images taken in unconstrained environments created and palmprint patterns obtained with the help of Active Appearance Model. First, performance rate of these coding techniques on the patterns were analyzed. Then, the advantages of 6 different approaches obtained by combining each feature determinant with each coding technique, is disclosed to the system.
- BildiriYalnız künye2015Virtual Mouse Control with Hand Gesture Information Extraction and Tracking
Dogan, Ramazan Ozgur; Dogan, Hulya; Köse, Cemal
Virtual mouse implemented with hand gesture tracking based on image is one of studies in human-computer interaction. In this study that human-computer interaction is implemented with virtual mouse is purposed. This study consists of three main steps that are hand gesture tracking, features of hand region extraction and classification of these features. In this study hand gesture tracking is generated with Camshift (Continuously Adaptive Mean Shift) algorithm, features of hand gestures are extracted with bag of visual words and these features are classified with support vector machines. Detailed tests are performed to compare success of tracking, features extraction and classisfication methods and that this system works successfully is shown.
- BildiriYalnız künye2015Health-Monitoring System based Tele-tip for Elders
Yildirim, Omer; Özgur, Ramazan; Kaya, Ismail; Kayikçioglu, Temel
Nowadays, developments in the medicine continue fastly. Technological devices developed on the basic of these developments are usually complex and its use isn't easy. In our studies, considering this situation, a wireless system which is used easyly by older adults is improved. Thanks to this system, patient's blood oxygen saturation, blood glucose, blood pressure and body weight values can be monitored remotely and easyly by their doctors. In addition, all of the patients' medical data are saved by server and their doctors can reach patients' medical history data. When all of these operations are in progress, there are wireless devices that are easy to use patient's side.
- BildiriYalnız künye2015Detection of Copy-Move Forgery Using DoGCode
Türk, Salih; Bingöl, Ozkan; Ulutas, Guzin
Copy-move forgery is performed as a part of an image is copied and moved to another region within the same image. For the detection of this type of forgery, usually, feature vectors of the image are created by dividing the image into sub-blocks. Then the feature vector of the region is compared with other regions in the image to reach a conclusion if they are matched. In this study, to determine the copy-move forgery, DoG Coding technique which is more resistant to changes in image brightness is used. Coded new image is formed with the help of this technique often preferred in the palmprint recognition systems and features are determined by dividing the image into sub-blocks. Block based region growing segmentation method have been developed to determine the size of the copied region. Proposed this new approach has been successfully applied on images in the CoMoFod dataset prepared by different scenarios.
- BildiriYalnız künye2014COMPUTER MONITORING AND CONTROL WITH HAND MOVEMENTS
Dogan, Ramazan Ozgur; Köse, Cemal
The devices such as mouse, keyboard used for controlling of computer have various limitations. The users must make physical contact with the devices and have a restricted away because of connection with wire to control computer by using these devices. Traditional communication devices for computer-person can't provide user wireless computer control without any physical. Inthis study, Computer monitoring and controlling with hand movements are implemented by using image proccesing and computer vision techniques to minimize these limitations. In proposed study, firstly it is expected that the user enters camera's field of view using computer camera. face of user entering the camera's field of view is detected with Haar Classifier. Hand region is detected by finding the dynamic range of skin color in YCbCr color space from the facial region. The hand region is tracked with Biggest Blob Tracking Technique, and features of hand are extracted by using Convexity Defect-Hull during tracking. Finally, position of mouse is controlled according to features of hand region, and Computer monitoring and controlling with hand movements are implemented bu tracking hand gestures.
- BildiriYalnız künye2014A Linear Signal Combination Model for UWB Applications
Oguz, Yasin; Kaya, Haydar
Systems that use UWB technology based on communication with baseband signals of very short duration recently attract attention in communication and radar application, and thereof have been improving rapidly. Because UWB signals occupy a spectrum that is spread about very wide frequency band, one of the principal issues that need to be considered in UWB applications is the frequency allocation. In order to minimize or prevent possible distorting interferences with existing communication systems, spectral distribution of mandatory EIRP limit values has been determined by FCC in UWB applications. In this study, a linear signal combination model has been established and on mathematical expressions have been provided for production of wave forms are suitable UWB emission mask specified by FCC.
- BildiriYalnız künye20133D Palmprint Pose Estimation Using Stereo Camera
Bingöl, Ozkan; Ekinci, Murat
Although studies on the palm recognition systems achieving are high performance ratios, hygiene problems in contact systems and change of hand pose in contactless systems were encountered. 3D recognition systems is proposed for solve these problems. But, these systems did not find the opportunity to become widespread because of expensive technologies and low scanning speed. In this study was proposed a method for detemined pose variations of palmprint using stereo cameras and transferring patterns that to be used for recognition to 2D space. Thus, both a non-contact system will be obtained and can be used properties of strong 2D recognition systems.
- BildiriYalnız künye2013Self-deploying composite shell reflector antenna for Ku-band missions: 1.5 m diameter demonstrator
Soykasap, Omer; Karakaya, Sukru; Kaplan, Erdar; Ilarslan, M; Ince, F; Kaynak, O; Basturk, S
Carbon fiber reinforced plastic (CFRP) composite shell reflectors have been developed for space borne antennas due to their light weight, high thermal stability, and high surface accuracy. In order to reduce launch cost and structural mass, compactly folding and self-deployment of the reflector is preferred. In this paper, the full-scale offset reflector with a diameter of 6 m was designed by introducing reinforcements in the central region. After modal analysis was carried out for full-scale reflector model, the suitability of design was determined and 1/4-scaled version was manufactured. The experiments of the demonstrator were conducted for modal analysis, folding, dynamic deployment behavior and surface accuracy. As a result of study, new reflector model was successfully designed with low-mass, manufacturing ease, lower cost and has a monolithic structure, which two opposite edges of the reflector can be rolled toward the center of the reflector for packaging.
- BildiriYalnız künye2013The effect of integration types on FLC based MPPT systems
Cakmak, Recep; Altas, Ismail H.
Operating the photovoltaic (PV) array at its maximum power available is important to increase system efficiency. In order to operate PV systems at their maximum power point, many maximum power point tracking (MPPT) methods have been proposed. Fuzzy logic controller (FLC) based MPPT methods have some advantages over classical MPPT methods. The way of using the FLC outputs has an effective role in obtaining the desired results. In this study, the effect of a discrete-time integration method investigated in MPPT including FLC whose output is subjected to integration operation. The system has been designed and simulated in MATLAB/Simulink software. The results were given as a comparison.
- BildiriYalnız künye2012Control of an optimum modelled air heating system and real time simulation
Özden, Talat; Tuǧal, Harun; Okumuş, Halil I.
In this paper, a controller was designed for air heating system and parameters of controller were calculated. A real time simulation of system was done to compare properties of controller both in simulation and real time simulation. To design a controller the system should be modelled. The modelling processes have done in our previous article was about modelling of air heating system.
- DergiProceedings of the Mediterranean Electrotechnical Conference - MELECON
- Dergi2018 26TH SIGNAL PROCESSING AND COMMUNICATIONS APPLICATIONS CONFERENCE (SIU)