Investigation of the efficiency of grain refiners on the hot tearing in Al8Si3Cu alloy

ULUDAĞ, Muhammet | ÇETİN, Remzi | DIŞPINAR, Derya

Shock failure analysis of metallic structures by using strain energy density method

ÇELİK, Mehmet | MERCİMEK, Ümit | KADIOĞLU, Suat

Failure of metallic structures operating under shock loading is a common occurrence in engineering applications. It is difficult to estimate the response of complicated systems analytically, due to structure's dynamic characteristics and varying loadings. Therefore, experimental, numerical, or a combination of both methods is used for evaluations. In this study, test pieces made of two different materials are subjected to shock loads stemming from firing of a Gatling gun. Strain measurements are made, and finite element analysis of the test piece is performed. As a result of this study, strain ...Daha fazlası

On the Interpretation of Melt Quality Assessment of A356 Aluminum Alloy by the Reduced Pressure Test: The Bifilm Index and Its Physical Meaning

ULUDAĞ, Muhammet | ÇETİN,Remzi | DIŞPINAR, Derya | TİRYAKİOĞLU, Murat

The oxide layer on liquid aluminum serves as a protective property to prevent the alloy from further oxidation. However, it has the potential to be a source of porosity when entrained into the bulk of the liquid. For this reason, oxides entrained into aluminum castings have been shown to degrade casting quality. In the current study, the effectiveness of the reduced pressure test in assessing the quality of A356 alloy melts has been investigated under various conditions obtained by changing six different melt parameters. Several metrics, including average pore size, number density of pores, bi ...Daha fazlası

Using Internet: A Mechanism to Develop Market Share

MOSTAVAFI SHIRAZI, Seyedeh Fatemeh

This chapter presents the subject area of the Internet as an international form of media and examines related issues. It begins by considering the Internet as a source of information in various forms of social network sites that enables any individual to post their experiences, opinions and evaluations of tourism destination. This provides a summary of the existing state of knowledge concerning to social network sites and word of mouth (WMO) recommendation. In addition, it serves to clarify the associated word of mouth and market share development. Introduction Using the Internet as an interna ...Daha fazlası

Calixarene assembly with enhanced photocurrents using P(SNS-NH2)/CdS nanoparticle structure modified Au electrode systems

SAYIN, Serkan | AZAK, Hacer | YILDIZ, Hüseyin Bekir | ÇAMURLU, Pınar | UYSAL AKKUŞ, Gülderen | TOPPARE, Lale | ERSÖZ, Mustafa

Two novel calix[n]arene-adorned gold electrodes producing high photocurrent intensities were successfully constructed by embedding gold electrode surfaces with both P(4-(2,5-di(thiophen-2-yl)-1H-pyrrol-1-yl)benzenamine) conducting polymer and 4-mercaptoboronic acid-functionalized semiconductor CdS nanoparticles to facilitate the binding of calix[n]arene sulfonic acids with nanoparticles. This structure enabled an electron transfer cascade that both induced effective charge separation and efficiently generated photocurrent. The prepared electrodes were used to generate photocurrent by relying o ...Daha fazlası

A 3D face animation system for mobile devices

MENDİ, Engin

In this paper, we present a 3D face animation system rendered on mobile devices. The system automatically creates realistic facial animation from text input with emotion tags. First, an input string is converted into synthetic voice and phonetic information. Then, 3D head model performs facial movements synchronized to the speech. The proposed system offers an affordable quick solution for applications that require virtual actors speaking text in which human-machine interfaces on mobile devices can profit.

Modeling of the Effects of Cyclic Voltammetry (CV) Using Fuzzy Logic with Different Membership Functions for Proton Exchange Membrane Fuel Cell (PEM) with Polyvinyl Alcohol/Nano Silver (PVA/Ag)

ERSOYOĞLU, Ali Serhat | ATA, Sadık | DİNÇER, Kevser | ÖNAL, Güral | YILMAZ, Yusuf

In this study, the effects of cyclic voltammetry (CV) has been modeled with Rule-based mamdani-type fuzzy (RBMTF), by using experimental data for proton exchange membrane fuel cell with PVA/AG. In the system developed, RBMTF apply input parameters are CV, scan rate and time, output parameters are current density and voltage. 12300 values for experimental study also obtained with RBMTF. Membership functions (MFs) are the building blocks of fuzzy set theory, i.e., fuzziness in a fuzzy set is determined by its MF. Accordingly, the shapes of MFs are important for a particular problem since they ef ...Daha fazlası

The Effect of Video Assisted Information on Anxiety and Pain Associated with Intrauterine Device Insertion

ERİÇ, Jule | PURUT, Yunus Emre | HARMANCI, Hatice

Fear of procedural pain or stress may be a barrier to women accessing intrauterine device (IUD) for contraception. The aim of this study is to evaluate the effect of video-assisted information on the anxiety and pain levels of patients undergoing IUD placement procedure. Introduction: Fear of procedural pain or stress may be a barrier to women accessing intrauterine device (IUD) for contraception. The aim of this study is to evaluate the effect of video-assisted information on the anxiety and pain levels of patients undergoing IUD placement procedure. Methods: A total of 100 patients who under ...Daha fazlası

Statistical electromagnetics for antennas

AÇIKGÖZ, Hulusi | ARYA, Ravi Kumar | WIART, Joe | MITTRA, Raj

After a brief introduction, this chapter discusses the state of the art of variable antennas and previous works on these antennas are reviewed. This is followed by an introduction to the most common statistical analysis techniques used for the purpose of the uncertainty propagation. The application of the statistical method to some real case structures is then considered; split ring resonator (SRR) and wearable antennas.