Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Ashyralyyev, Charyyar(18)
- Ashyralyev, A.(15)
- Dogan, Ramazan Ozgur(15)
- Ashyralyev, A(10)
- Ekinci, Murat(9)
- Lukashov, A.(9)
- Kayikçioglu, Temel(8)
- Malkowsky, E(8)
- Özden, Talat(8)
- Akinoglu, Bulent G.(7)
- Memetoglu, M. E.(7)
- Albayrak, Cenk(6)
- Ashyralyev, Allaberen(6)
- Cakir, Zafer(6)
- Dogan, Hulya(6)
- Kayikcioglu, Temel(6)
- Bingol, Ozkan(5)
- Bingöl, Ozkan(5)
- Cakalli, H.(5)
- Canak, I.(5)
- Demir, S.(5)
- Gedikli, Eyup(5)
- Gurtug, O.(5)
- Harte, R.(5)
- Kalkan, A.(5)
- Kandemir, H.S.(5)
- Kocinac, L.D.R.(5)
- Ozden, Talat(5)
- Ozsahin, M(5)
- Sadybekov, M.(5)
- Sahin, H.(5)
- Simsek, Cemaleddin(5)
- Tez, M.(5)
- Turan, I.(5)
- Yildirim, Omer(5)
- Çakmak, Recep(5)
- Akay, K.U.(4)
- Akpulat, Murat(4)
- Aliyazicioglu, Y.(4)
- Altas, Ismail H.(4)
Yayınlar
- BildiriYalnız künye2013Automated Functional Imaging in Atrioventricular Delay Time Optimization in Patients with Dual Chamber Pacemakers
Arik, Osman Ziya; Kalkan, Gulhan Yuksel; Sahin, Durmus Yildiray; Elbasan, Zafer; Gür, Mustafa; Kuloglu, Osman; Tekin, Kamuran; Gençaslan, Murat; Türkoglu, Caner; Uçak, Haci Ali
- 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 künye2013Three-dimensional modeling of women's talus bone
Catal, Hatice; Corumluoglu, Ozsen; Bayram, Bulent
In this study, semi-automatic region-based digital image processing techniques were used to create 3-dimensional (3D) virtual model of talus bone. 5 ballerinas and 5 sedentary women have voluntarily been involved in to the study. Total 20 right and left feet have been used which have been taken from the multidetector computed tomography (MDCT). We used 3D Doctor Software in this research. Image preprocessing, segmentation and 3D modeling steps were done respectively. Volume, area and length based various statistical ratios were computed according to the measurements. The comparisons have been accomplished by using these ratios for sedentary and ballerinas. As an outcome, some differences were found in talus of ballerina and sedentary women. We hope that the results from the biometric and reconstructive techniques carried out in this study will contribute to the present knowledge in orthopedics and digital image processing in this area.
- 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 künye2013Genetic algorithm in Electrical Transmission Lines path finding problems
Eroglu, Hasan; Aydin, Musa
Today, Geographic Information Systems (GIS) solutions have entered every corner of the engineering studies like Electrical Transmission Lines (ETL) route optimization, vehicle routing, power plant siting and so on. Raster-based maps generated by GIS are very useful solutions for this kind of route optimization problems. The weighted sum of all the data can be converted to raster-based maps and gathered consecutively in GIS for ETL route optimization. In this paper, Genetic Algorithm (GA) is applied to ETL route optimization problems in order to find the best route on raster-based maps.
- BildiriYalnız künye2013Revisiting graphical passwords for augmenting, not replacing, text passwords
Akpulat, Murat; Bicakci, Kemal; Cil, Ugur
Users generally choose weak passwords which can be easily guessed. On the other hand, adoption of alternatives to text passwords has been slow due to cost and usability factors. We acknowledge that incumbent passwords remain difficult to beat and introduce in this study Type&Click (T&C), a hybrid scheme supporting text passwords with the graphical passwords. In T&C, users first type a text as usual and then make a single click on an image to complete the password entry. While largely preserving the login experience with the text passwords, the new scheme utilizes accumulated scientific knowledge in graphical password research (implicit feedback, persuasion during password creation, leveraging cued recall memory). The results of our user study suggest that T&C is promising for augmenting text passwords for improved security without degrading usability. Copyright 2013 ACM.
- BildiriAçık Erişim2012Strategic Diversity Management Initiatives: A Descriptive Study
Besler, Senem; Sezerel, Hakan; Ozsahin, M; Zehir, C
The study presents a brief literature on diversity management, affirmative action, and equal employment opportunity concepts perspectives, and explores how diversity management takes place in the hotel industry via websites of the biggest hotel groups in Turkey. Recent strategic human resources strategies have reoriented from addressing the average employee stereotype to the employee with diversified skills, backgrounds, cultural competencies and the effects of globalization identities, organization are confronted with the challenge of recognizing and managing diversity. In the study, diversity related human resource management statements and diversity management statements within the given literature are taken into account and interpreted. Data suggests that regarding preceding studies, the biggest hotels groups in Turkey generally do not communicate with the internal and external shareholders about diversity-related issues. Out of 15 entities, only one organization with domestic-based capital has mentioned statements and all the foreign capital organizations have in their websites, but not in Turkish.
- BildiriYalnız künye2012Administration of 4-vinyl-1-cyclohexene 1,2-epoxide diminishes ovarian follicles in dogs
Paksoy, Z.
- BildiriYalnız künye2012The Effects of Types and Content of Fibers on Mechanical Properties of Cementitious Composites
Çavdar, Ahmet; Ozkul, MH; Atahan, HN; Dogan, UA; Pekmezci, BY; Sengul, O
In this study, four different types of fibers are added to cement mortars and it is aimed to investigate their mechanical contributions to mortars, comparatively. Polypropylene (PP), carbon (CF), glass (GF) and polyvinyl alcohol (PVA) fibers are chosen as fibers to research. These fibers are added into mortars five different ratios (0.0%, 0.5%, 1.0%, 1.50% and 2.0%) by volume. The mechanical properties investigated are flexural strength, deflection and compressive strength of the cement mortars. These properties are determined under two conditions, one of two is saturated surface dry (SSD) and second one is oven dry (OD). It is concluded that each fibers contributes the mechanical properties of mortars in different addition ratios. PVA fibers show the best performance of the fibers investigated in this study. Fibers present best performance at OD condition.
- BildiriYalnız künye2012Using 3D models from multidetector computed tomography images for diagnostic of Hallux-valgus
Catal, Hatice; Corumluoglu, Ozsen
Medical image processing techniques is often used in medicine or some engineering fields. In this study, we used basic techniques of metric digital image processing. Axial MDCT (Multidetector Computed Tomography) Ballerina's feet images were used to form 3D models by 3D-Doctor software. The virtual 3D models are in high accuracy. Hallux-valgus angles were calculated and recorded by using these 3D virtual models. We hope that the results from the biometric and reconstructive techniques carried out in this work will contribute to the present knowledge in medicine especially on ballerina's foot health and digital image processing in this area.
- BildiriYalnız künye2012Finite difference method for the reverse parabolic problem with Neumann condition
Ashyralyyev, Charyyar; Dural, Ayfer; Sozen, Yasar; Ashyralyev, A; Lukashov, A
A finite difference method for the approximate solution of the reverse multidimensional parabolic differential equation with a multipoint boundary condition and Neumann condition is applied. Stability, almost coercive stability, and coercive stability estimates for the solution of the first and second orders of accuracy difference schemes are obtained. The theoretical statements are supported by the numerical example.
- BildiriYalnız künye2012Designing a load agent for power management with a multi-agent home automation system
Özden, Talat; Okumuş, Halil Ibrahim
In this study, a load agent design is performed for the power management which lets us use existing electrical energy for consumer's needs, comfort and criteria in the areas such as flats and commercial buildings that independently meet their energy need from renewable energy sources. The load agent is designed on the basis of radio-frequency communication so it is a wireless communication system which also has the ability of switching off or making power flow by measuring current of the load. The agent has a flexible structure in order to be compatible with all ambient equipments. It can work with all equipments on the system properly, without any hardware changing. And this is shown in the paper.
- 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.
- BildiriYalnız künye2012Acetohydrazide derivative for selective separation and preconcentration of Cu(II) ions by coprecipitation method without using a carrier element
Ozdes, Duygu; Duran, Celal; Bektaş, Hakan; Tufekci, Mehmet; Soylak, Mustafa
A simple and rapid procedure based on the combination of carrier element free coprecipitation (CEFC) and flame atomic absorption spectrometric (FAAS) determinations has been developed for selective separation and preconcentration of Cu(II) ions in some environmental solid (Turkish and import coffee) and liquid (sea and stream waters) samples. In this method, acetohydrazide derivative was used as an organic coprecipitant without adding any carrier element for coprecipitation of Cu(II) ions. The preconcentration factor was found to be 50, the limit of detection (LOD) was 0.31 μgL -1, while the relative standard deviation (RSD) was found to be 1.6% for Cu(II) ions.
- BildiriYalnız künye2012Fractional parabolic differential and difference equations with the Dirichlet-Neumann condition
Ashyralyev, Allaberen; Emirov, Nazar; Cakir, Zafer; Ashyralyev, A; Lukashov, A
The multidimensional fractional parabolic equation with the Dirichlet-Neumann condition is studied. Stability estimates for the solution of the initial-boundary value problem for this fractional parabolic equation are established. The stable difference schemes for this problem are presented. Stability estimates for the solution of the first order of accuracy difference scheme are obtained. A procedure of modified Gauss elimination method is applied for the solution of first and second order of accuracy difference schemes of one-dimensional fractional parabolic differential equations.
- BildiriYalnız künye2012Modeling of FLC-incremental based MPPT using DC-DC boost converter for standalone PV system
Cakmak, Recep; Altas, Ismail H.; Sharaf, Adel M.
This paper presents the modeling of a Fuzzy Logic Controller-Incremental (FLC-Inc.) based maximum power point tracking (MPPT) method and its comparison with traditional Perturb and Observation (P&O) method for standalone photovoltaic (PV) systems. The PV system, which is composed of PV panels, boost converter, MPPT unit and dc load, is modeled and digitally simulated in MATLAB/Simulink. The simulated results are illustrated to show the improvements obtained by the proposed FLC-Inc. based MPPT method.
- BildiriYalnız künye2012Three-dimensional modeling of the sesamoid bones
Catal, Hatice; Corumluoglu, Ozsen
In this research, digital image processing techniques was used to create 3-dimensional (3D) virtual model of sesamoid bones. As study materials, Ballerina's and sedentary women's axial MDCT (Multidetector Computed Tomography) feet images were utilized. For the determination bone boundaries in each slides, image preprocessing and then segmentation steps were followed. All these processing steps was done in 3DDoctor software. All the measurements were obtained over the 3D model formed. Various statistical ratios were computed regarding the area, volume and length measurements. The comparison done in the study was performed by using these ratios for sedentary and ballerinas. As an outcome, some differences were found in sesamoid bones of ballerina and sedentary women.
- BildiriYalnız künye2011AN UNUSUAL CLINICAL STATE: ATRIAL FIBRILLATION DUE TO MAD-HONEY INTOXICATION
Memetoglu, M. E.; Kalkan, A.; Kurtcan, S.; Kara, V.; Ertas, G.; Cetinkaya, A. S.; Talay, S.; Tutar, N.; Yesilkaya, S.
- BildiriYalnız künye2011PERCUTANEOUS TREATMENT OF A GIANT ILIAC ARTERY PSEUDOANEURYSM IN BEHCET'S DISEASE
Memetoglu, M. E.; Kalkan, A.; Tas, M.; Kacar, E.