Cilt 06, Sayı 2 (2016)

The Impact of Concrete Strength on the Structure Performance under Repeated Loads

Fri, 01 Jan 2016 00:00:00 GMT

The Impact of Concrete Strength on the Structure Performance under Repeated Loads BAKIŞ, Abdulrezzak; ÖZDEMİR, Mesut; IŞIK, Ercan; EL, Alev Akıllı Reinforced concrete structures such as RC buildings and rigid pavements are exposed to tensions within the impact of repeated loads. Earthquake and wind load could be given as the examples for repeated loads. In this study; compression tests have been conducted under the repeated loads for the attained reinforced concrete samples. Three different samples have been prepared in the study and they have been subjected to compression test. Repetitive compression tests have been applied to each sample and loading has been continued until the concrete is in the status of not being able to bear any more loads. Structure performance analyses have been carried out for the sample reinforced concrete building selected with the use of the concrete compression strengths attained under the repeated loads. The purpose of the study is to reveal how the repeated loads affect the compression strength of the concrete. At what degree these attained concrete compression strengths affect the structure performance has been examined.

The Modeling and Performance Comparison of PD and Takagi-Sugeno Type Fuzzy Logic Controllers for Inverted Pendulum System

Fri, 01 Jan 2016 00:00:00 GMT

The Modeling and Performance Comparison of PD and Takagi-Sugeno Type Fuzzy Logic Controllers for Inverted Pendulum System Şit, Sami; Kılıç, Erdal; Özçalık, Hasan Rıza; Alhasan, Hussein Alruim; Gani, Ahmet In recent years, fuzzy logic based modeling and control methods have been increasingly used in the academic field. Inverted pendulum system consists of conventional materials with nonlinear dynamic structure in order to test types of controllers. This paper presents a simulation study of Takagi-Sugeno type fuzzy logic controllers for an inverted pendulum (cart-pole) system. A Takagi-Sugeno method was applied to the inverted-pendulum system, which can balance the pendulum over a greater range of pole angle and cart position. Takagi-Sugeno fuzzy logic controller proposed in this study is compared with the conventional PD controller in order to demonstrate the performance of the proposed controller. This study aims to determine the best control strategy that provides better performance in terms of pendulum's angle and cart's position. A Takagi-Sugeno type fuzzy logic controller yields better results. Simulation results demonstrated that the proposed fuzzy controller is effectiveness and robust.

RFID based on the design of a new fuel recognation system

Fri, 01 Jan 2016 00:00:00 GMT

RFID based on the design of a new fuel recognation system Maraşlı, Fatih; Çıbuk, Musa A new fuel recognition system based on Radio Frequency Identification (RFID) technology aims to provide a solution for the problems that occur during refueling process of vehicles such as wrong type of fuel filling and misusage of pumps, especially in fuel stations. The RFID tags are placed both in vehicles and stations consistently due to the proposed system. A software interface is designed for visual tracking of the system using the C# programming language. The developed interface works with the integrated RFID application development kit. Reading and writing operations on tags are performed via this kit. The results are shown at the interface display. The process of data storage is done by means of a created database, both on server systems and in the memory of the tag. Also in the mini-survey results carried out under this thesis, it is inferred that this system would be a solution for the financial and depreciative loss of fuel stations. As a result, with the system developed in this study, an effective and practical solution is provided against refueling errors. Thus, it would be possible to overcome this kind of errors which cause traffic and vehicle problems

Effects of Road Construction Works on Some Bird Communities in Van (Turkey)

Fri, 01 Jan 2016 00:00:00 GMT

Effects of Road Construction Works on Some Bird Communities in Van (Turkey) Nergiz, Hümeyra; Durmuş, Atilla Human activities represent an important threat to biodiversity. Birds are especially valuable in evaluating environmental monitoring. In this study, we investigated effects of road reconstruction and restoration activities on birds such as Sand martin (Riparia riparia), European bee-eater (Merops apiaster) and European roller (Coracias garrulus) nesting at roadside in Van, Turkey. To test and control for possible effects, we conducted point-count surveys along the 85 kilometers long highway in Van between years 2013-2015. Our results demonstrated that total population number of these species and nests decreased during and after the road broadening and construction efforts between years 2013- 2015 (p<0.05). These three species failed to find alternative nest area affected by habitat destruction caused by road construction works.