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INVESTIGATION OF THE EFFECT OF LIQUID HEIGHT AND BAFFLE GEOMETRY ON DRAWDOWN OF FLOATING SOLIDS IN STIRRED TANKS Gök, Gökhan; Ayranci Tansık, İnci; Department of Chemical Engineering (2024-8-29) In solid-liquid mixing operations, stirred tanks are commonly used in industries. The geometry of the stirred tanks significantly affect the flow characteristics of these operations. Baffle configuration and aspect ratio which is ratio of liquid height (H) to tank diameter (T) are some of the main geometric factors. Especially in a fermentor (bioreactor) where it needs adeaquate volume for an efficient aeration, aspect ratio is one the substantial parameters. Moreover, baffles promote mixing so, it increas...
EXPLORING VIRTUAL FIELD TRIP INTEGRATION IN STEM EDUCATION: INSIGHTS FROM A MULTIPLE CASE STUDY Güzeller, Gizem; Akyüz, Didem; Department of Secondary Science and Mathematics Education (2024-9-06) Virtual Field Trips (VFTs), which offer teachers innovative ways to extend learning beyond the classroom boundaries in real-world contexts, have begun to increase considerably, especially after the pandemic. However, there is limited information in the literature regarding effective pedagogical strategies when utilizing VFTs in integrated STEM (Science, Technology, Engineering, and Mathematics) education. This study aimed to investigate how middle school mathematics teachers design and implement VFT-support...
Design of a tunable wideband bandpass filter based on substrate integrated waveguide technology for channelized receivers İşcan, Ecenaz; Durgun, Ahmet Cemal; Department of Electrical and Electronics Engineering (2024-9-5) In this thesis, a compact-size wideband bandpass filter (BPF) design that can operate in the S/C Band is presented. High out-of-band rejection, low insertion loss, and high return loss are other advantageous features achieved. The proposed BPF is suitable for use in satellite communication, channelized receivers, front-end units, measurement, and test devices. A hybrid approach combining lumped capacitors and the substrate-integrated waveguide technique is chosen to create the BPF. The goal is to decrease t...
Numerical implementation of a strain gradient plasticity model coupled with nonlocal damage Ünsal, İzzet Erkin; Yalçınkaya, Tuncay; Department of Aerospace Engineering (2024-10-07) This thesis presents the implementation of a lower-order strain gradient plasticity model to capture size-dependent plastic deformation and nonlocal damage effects. Two methods are employed to calculate the effective plastic strain gradient: the interpolation method, which uses plastic strain values at integration points, and the extrapolation method, which utilizes nodal values of plastic strain. The extrapolation method consistently predicts higher plastic strain gradients, leading to stronger material re...
Energy-Based Seismic Response Assessment of Simple Structural Systems by Considering Turkish Strong Ground Motion Dataset Damirzade, Toghrul; Erberik, Murat Altuğ; Department of Civil Engineering (2024-9-06) In earthquake engineering, seismic design and analysis of structures can be established in terms of force, displacement or energy. Among these parameters, energy is the most enhanced and stable one which makes it a good candidate for the seismic response assessment of structural systems. Therefore, in this study, seismic response characteristics of single degree of freedom systems are evaluated in terms of energy parameters. For this purpose, records from the Turkish strong ground motion dataset have been...

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