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torkinejad-ziarati--pouriya
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Analysis of Appearance of Bone Barrier in HIFU Treatment Method
, M.Sc. Thesis Sharif University of Technology ; Ahmadian, Mohammad Taghi (Supervisor) ; Firoozbakhsh, Keykhosrow (Supervisor)
Abstract
Currently, the HIFU (High Intensity Focused Ultrasound) therapy method is known as one of the most advanced surgical techniques in tumor ablation therapy. Simulation of the HIFU therapy in the case of appearance of bon barrier is essential in HIFU planning to improve the usefulness and efficiency of treatment in brain tumor cases. In this work, linear, thermoviscous equations are applied for simulation of phase correction array and steering method, after analysis of performance, these methods are used in a 3D human brain and skull model to estimate thermal ablation in case of using these methods. Results indicate that the maximum focal pressure of 1.42 and 1.65 MPa can be achieved for...
Investigating the Effect of Personality Traits and Data Source on the Privacy Calculus of Social Media Online Behavioral Advertising
, M.Sc. Thesis Sharif University of Technology ; Najmi, Manoochehr (Supervisor) ; Koorank Beheshti, Mohammad Ali (Co-Supervisor)
Abstract
Personalized advertising has grown drastically as new tracking technologies allow advertisers to monitor consumers’ online behavior and distribute advertisements accordingly, which has given rise to privacy concerns. The present study investigates the role of personality traits and data source in social media behavioral advertising’s value perception. Two online studies were conducted to examine how plasticity (shared variance of openness and extraversion) and data source (first party vs third-party) affect consumers’ privacy calculus and purchase intention respectively. The participants, all active social media users from the United States, were hired from Prolific.co. For the first study,...
Wettability Alteration of Reservoir Rocks to Super Gas-Wet Condition Using Nanocomposite by Applying Contact Angle Measurement for Gas-Crude Oil System
, M.Sc. Thesis Sharif University of Technology ; Ghazanfari, Mohammad Hossien (Supervisor) ; Fatemi, Mobeen (Supervisor) ; Esmaeilzadeh, Pouriya (Co-Supervisor)
Abstract
Today, increasing the productivity of reservoirs is more important than in the past, while the use of nanoparticles to change the wettability of rock and increase the recovery factor from the reservoir has been considered by many researchers. Despite previous studies on the use of nanoparticles to change the wettability of rock to gas-wet, the use of nanocomposites with super gas-wet at high temperature and pressure in the crude oil-gas system has rarely been considered. In this research, several nanocomposites with different structures have been synthesized in the laboratory and nanofluids with different formulations have been used to coat the rock thin sections and measure droplet contact...
Development of a novel cervix-inspired tortuous microfluidic system for efficient, high-quality sperm selection
, Article Lab on a Chip ; Volume 23, Issue 13 , 2023 , Pages 3080-3091 ; 14730197 (ISSN) ; Hajari, M. A ; Abdorahimzadeh, S ; Shahverdi, A ; Esfandiari, F ; Ziarati, N ; Taghipoor, M ; Montazeri, L ; Sharif University of Technology
Royal Society of Chemistry
2023
Abstract
Microfluidic systems have been extensively studied in recent years as potential alternatives for problematic conventional methods of sperm selection. However, despite the widespread use of simple straight channels in these systems, the impact of channel geometry on selected sperm quality has not been thoroughly investigated. To explore this further, we designed and fabricated serpentine microchannels with different radii of curvature, inspired by the tortuous structure of the cervix. Our results showed that in the presence of gentle backflow, microfluidic channels with a 150 μm radius of curvature significantly enhanced the quality of selected sperms when compared to straight channels....