Browsing Mechanical Engineering by Author "Özyeğin University"
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3-D dynamic walking trajectory generation for a bipedal exoskeleton with underactuated legs: A proof of concept
Soliman, Ahmed Fahmy; Şendur, Polat; Uğurlu, Regaip Barkan (IEEE, 2019-06)This paper presents a framework to address three dimensional (3-D) dynamic walking for a bipedal exoskeleton with underactuated legs. To achieve this goal, the framework is constructed via a trajectory generator and an ... -
3-D extension of chemical mechanical polishing for nano-structuring applications on alternative technologies
Özdemir, Zeynep; Başım, Gül Bahar (The Electrochemical Society, 2016)In this study we tune the chemical mechanical polishing process to a 3-D level to generate controlled nanostructures on functional metallic surfaces such as titanium implants and steel based heating elements. The chemical ... -
A 3-DoF robotic platform for the rehabilitation and assessment of reaction time and balance skills of MS patients
Ersoy, Tuğçe; Hocaoğlu, E. (Public Library of Science, 2023-02-24)The central nervous system (CNS) exploits anticipatory (APAs) and compensatory (CPAs) postural adjustments to maintain the balance. The postural adjustments comprising stability of the center of mass (CoM) and the pressure ... -
3D simulation of droplet impact on static and moving walls
Yılmaz, Anıl; Kayansalçik, Gökhan; Ertunç, Özgür (Begell House Inc., 2022)In the present study, the contact angle model and the origin of the parasitic current, precisely, the relation of the parasitic current with grid distribution, have been studied to accurately predict droplet impact on ... -
Absorption and plasmon resonance of bi-metallic core-shell nanoparticles on a dielectric substrate
Avşar, D.; Ertürk, H.; Mengüç, Mustafa Pınar (Begell House Inc., 2019-06)Numerical investigation of absorption efficiency profiles and localized surface plasmon resonance (LSPR) wavelengths are performed for metallic core-shell nanoparticles (NPs) placed over a BK7 glass substrate. Gold (Au) ... -
Absorption suppression of silver nanoparticles in the presence of an AFM tip: A harmonic oscillator model
Huda, G. M.; Mengüç, Mustafa Pınar; Hastings, J. T. (AIP, 2012)We numerically calculated the optical absorption of silver nanoparticles (AgNP) in the presence of metallic and dielectric AFM probes, illuminated by transverse magnetic (TM) polarized, total internal reflected waves. ... -
Acoustic analysis of an axial fan
Hashım, Hafız Muhammad; Dogruoz, M. B.; Arık, Mehmet (IEEE, 2017)Axial fans are often used in cooling electronic enclosures where low noise levels are highly demanded. Therefore, methods for predicting the noise emitted by an application including single or multiple fans are desirable ... -
Acoustics and heat transfer characteristics of piezoelectric driven central orifice synthetic jet actuators
Ikhlaq, M.; Yasir, M.; Ghaffari, O.; Arık, Mehmet (Taylor & Francis, 2022-09-19)Growth in computational capacity combined with a decrease in the size of digital devices has led to increasing demand for more active and efficient cooling of electronics. In this study, an experimental investigation into ... -
An active brace for controlled transdermal drug delivery for adjustable physical therapy
Erol, Levent; Bebek, Özkan; Karagöz, Ayşe; Başım, Gül Bahar (IEEE, 2014)This study presents an active brace which is a cost efficient precision-controlled advanced therapy medicinal product for time and rate controlled transdermal drug delivery (TDD) through the use of drug containing nanoparticles ... -
Active compliance control reduces upper body effort in exoskeleton-supported walking
Uğurlu, Regaip Barkan; Oshima, H.; Sariyildiz, E.; Narildyo, T.; Babic, J. (IEEE, 2020-04)This article presents a locomotion controller for lower limb exoskeletons so as to enable the combined robot and user system to exhibit compliant walking characteristics when interacting with the environment. This is of ... -
Active-grid turbulence effect on the topology and the flame location of a lean premixed combustion
Alhumairi, Mohammed Khudhair Abbas; Ertunç, Özgür (Society of Thermal Engineers of Serbia, 2018)Lean premixed combustion under the influence of active-grid turbulence was computationally investigated, and the results were compared with experimental data. The experiments were carried out to generate a premixed flame ... -
Adaptive shared control with human intention estimation for human agent collaboration
Amirshirzad, Negin; Uğur, E.; Bebek, Özkan; Öztop, Erhan (IEEE, 2022)In this paper an adaptive shared control frame-work for human agent collaboration is introduced. In this framework the agent predicts the human intention with a confidence factor that also serves as the control blending ... -
Addressing the strength-ductility trade-off in a thermomechanical-processed high entropy alloy
Radi, Amin; Işıl, Canay; Seyedmohammadi, Seyedveghar; Kim, H. S.; Yapıcı, Güney Güven (Elsevier, 2023-12-15)High entropy alloys (HEAs) have garnered significant attention due to their exceptional mechanical behavior. However, the influence of secondary phases and dislocation substructures has yet to be thoroughly investigated. ... -
Advanced slurry formulations for new generation chemical mechanical planarization (CMP) applications
Başım, Gül Bahar; Karagöz, Ayşe; Özdemir, Zeynep (Cambridge University Press, 2012-01)Chemical Mechanical Planarization (CMP) is widely used to ensure planarity of metal and dielectric surfaces to enable photolithography and hence multilevel metallization in microelectronics manufacturing. The aim of this ... -
Advanced surface enhancement of a high strength aluminum alloy through friction stir processing
Ghobadlou, Ali Hosseınzadeh; Radi, Amin; Yapıcı, Güney Güven (Springer, 2022)The current study investigates the effect of severe plastic deformation (SPD) on the mechanical behavior of a commercial aluminum alloy (Al7075). In-process cooled friction stir processing (FSP) was used to enhance the ... -
Agile and stable running locomotion control for an untethered and one-legged hopping robot
Uğurlu, Regaip Barkan; Sariyildiz, E.; Kawasaki, T.; Narikiyo, T. (Springer, 2021-09)This paper is aimed at presenting a locomotion control framework to realize agile and robust locomotion behaviors on conventional stiff-by-nature legged robots. First, a trajectory generator that is capable of characterizing ... -
Analysis of near-field radiation transfer within nano-gaps using FDTD method
Didari, Azadeh; Mengüç, Mustafa Pınar (Elsevier, 2014-10)Enhancement of near-field radiative emission via coupling of surface plasmons in nano-gaps formed between thin films is important for understanding and implementation of energy harvesting using nano-thermophotovoltaic ... -
Analysis of perlite and pumice based building insulation materials
Çelik, S.; Family, Roxana; Mengüç, Mustafa Pınar (Elsevier, 2016-06)Insulation panels composed of perlite, pumice, and cement were fabricated. Perlite and pumice were used to achieve high thermal resistance, and low density. Experimentation was conducted for determining R-values of ... -
Analysis of sustainable materials for radiative cooling potential of building surfaces
Family, Roxana; Mengüç, Mustafa Pınar (MDPI AG, 2018)The main goal of this paper is to explore the radiative cooling and solar heating potential of several materials for the built environment, based on their spectrally-selective properties. A material for solar heating, ... -
Application of a disturbance observer based controller to improve vehicle ride
Şendur, Polat; Uğurlu, Regaip Barkan (Canadian Acoustical Association, 2019)In this paper the application of a disturbance observer based control algorithm is proposed to improve the vehicle ride performance of a vehicle that has magnetorheological damper (MR Damper) suspension. The vehicle is ...
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