Browsing by Author "Körük, Hasan"
Now showing items 1-20 of 40
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1441. Quantification of the flow noise in household refrigerators
Körük, Hasan; Arısoy, Ahmet; Bilgin, Necati (JVE INTERNATIONAL LTD., 2014)The flow noise in household refrigerators is quantified in this study. First, the sound pressure measurements in a quiet room using typical household refrigerators are conducted and the noise characteristics of the ... -
18 - Acoustic and mechanical properties of biofibers and their composites
Körük, Hasan; Koç, Büşra; Genç, Garip (Elsevier, 2022)In this study, the acoustic and mechanical properties of many biofibers and their composites are presented. First, the sound absorption coefficients and transmission losses of commonly used natural fibers and their composites ... -
19 - Identification of the elastic and damping properties of jute and luffa fiber-reinforced biocomposites
Körük, Hasan; Saygılı, Yusuf; Genç, Garip; Şanlıtürk, Yusuf Kenan (Elsevier, 2022)Although there are many studies in the literature on the static mechanical properties of biomaterials such as tensile strength, the dynamic mechanical properties of biomaterials such as modal loss factors have not been ... -
Acoustic and mechanical properties of luffa fiber-reinforced biocomposites
Körük, Hasan; Genç, Garip (Elsevier, 2019)This chapter presents an overview of acoustic and mechanical behaviors of luffa fiber reinforced biocomposites. A growing number of studies are examining the composites of biodegradable fibers such as flax, hemp, kenaf and ... -
Acoustic particle palpation for measuring tissue elasticity
Körük, Hasan; El Ghamrawy, Ahmed; Pouliopoulos, Antonios N; Choi, James J (American Institute of Physics, 2015)We propose acoustic particle palpation—the use of sound to press a population of acoustic particles against an interface—as a method for measuring the qualitative and quantitative mechanical properties of materials. We ... -
Acoustic streaming in a soft tissue microenvironment
El Ghamrawy, Ahmed; de Comtes, Florentina; Körük, Hasan; Mohammed, Ali; Jones, Julian R; Choi, James J (Elsevier, 2019)We demonstrated that sound can push fluid through a tissue-mimicking material. Although acousticstreaming in tissue has been proposed as a mechanism for biomedical ultrasound applications, such as neuromodu-lation and ... -
Application of ultrasonic vibrations for minimization of the accumulation of limescale in steam irons
Körük, Hasan; Serenli, Muzaffer; Şanlıtürk, Kenan Yüce (Elsevier, 2018)The accumulation of limescale in steam irons can significantly reduce the ironing efficiency. It is this problem that inspired us to introduce ultrasonic vibrations to irons in order to minimize limescale accumulation. ... -
Assessment of the measurement and prediction Methods for the acoustic properties of natural fiber samples and evaluation of their properties
Körük, Hasan (Taylor & Francis, 2021)Although some studies have been conducted to show how natural fibers can replace synthetic materials, the use of many natural fibers is still limited. On the other hand, the use of natural fibers can become very common ... -
Assessment of the models for predicting the responses of spherical objects in viscoelastic mediums and at viscoelastic interfaces
Körük, Hasan (IOP Publishing Ltd, 2021)Spherical objects, such as bubbles and spheres, embedded in mediums and at viscoelastic interfaces are encountered in many applications, including the determination of material properties. This paper assesses the models ... -
An assessment of the performance of impedance tube method
Körük, Hasan (Institute of Noise Control Engineering, 2014)The impedance tube method is widely used for measuring sound absorption (or reflection) coefficients of acoustic materials as a function of frequency. However, the sound absorption coefficients obtained using the impedance ... -
Characterization of viscoelastic materials using free-layered and sandwiched samples: assessment and recommendations
Özer, Mehmet Sait; Körük, Hasan; Şanlıtürk, Kenan Yüce (Polish Physical Society, 2015)Viscoelastic materials are widely used in many applications in practice. However, determination of the elastic and damping properties of these materials is quite difficult in the sense that the identified results may contain ... -
Detection of air leakage into vacuum packages using acoustic measurements and estimation of defect size
Körük, Hasan; Şanlıtürk, Kenan Yüce (Elsevier, 2019)Air leakages in food and ingredient packages which are sealed in vacuum environments may cause a marked deterioration of the product, leading to a loss of functionality. Manufacturers of such products have very stringent ... -
Development of a model for predicting dynamic response of a sphere at viscoelastic interface: A dynamic Hertz model
Körük, Hasan (IOP Publishing Ltd, 2021)A model for predicting the dynamic response of a sphere at viscoelastic interface is presented. The model is based on Hertz contact model and the model for a sphere in a medium. In addition to the elastic properties of ... -
Development of an equivalent shell finite element for modelling damped multi-layered composite structures
Özer, Mehmet Sait; Körük, Hasan; Şanlıtürk, Kenan Y. (Elsevier, 2020)A new equivalent shell finite element (FE) for modelling damped multi-layered structures is presented in this study. The method used for developing the new FE for such structures is based on the idea that the strain energy ... -
Development of an improved mathematical model for the dynamic response of a sphere located at a viscoelastic medium interface
Körük, Hasan (IOP, 2021)A comprehensive investigation on the static and dynamic responses of a sphere located at elastic and viscoelastic medium interfaces is performed in this study. First, the mathematical models commonly used for predicting ... -
Displacement of a bubble by acoustic radiation force into a fluid-tissue interface
Körük, Hasan; Choi, James J (2018)Microbubbles in an ultrasound beam experience a primary Bjerknes force, which pushes the microbubbles against a fluid-tissue interface and deforms the tissue. This interaction has been used to measure tissue elasticity and ... -
Displacement of a bubble located at a fluid-viscoelastic medium interface
Körük, Hasan; Choi, James J. (Acoustical Society of America, 2019)A model for estimating the displacement of a bubble located at a fluid-viscoelastic medium interface in response to acoustic radiation force is presented by extending the model for a spherical object embed- ded in a bulk ... -
Effects of machining on the acoustic and mechanical properties of jute and luffa biocomposites
Genç, Garip; Körük, Hasan (Elsevier, 2023)After their production, biocomposite structures do not always have the final shape or dimensions required for their purpose, hence, they need machining. However, the effects of machining on the acoustic and mechanical ... -
The effects of ultrasound parameters and microbubble concentration on acoustic particle palpation
Saharkhiz, Niloufar; Körük, Hasan; Choi, James J (Acoustical Society of America, 2018)The elasticity of tissue—an indicator of disease progression—can be imaged by ultrasound elasticity imaging technologies. An acoustic particle palpation (APP) has recently been developed—the use of ultrasonically driven ... -
Elastic deformation of soft Tissue-Mimicking materials using a single microbubble and acoustic radiation force
Bezer, James H.; Körük, Hasan; J Rowlands, Christopher; Choi, James J. (Elsevier, 2020)Mechanical effects of microbubbles on tissues are central to many emerging ultrasound applications. Here, we investigated the acoustic radiation force a microbubble exerts on tissue at clinically relevant therapeutic ...
