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Publication Restricted Algorithmic quantum heat engines(Koç University, 2019) Köse, Şaban Emre; Müstecaplıoğlu, Özgür Esat; 0000-0002-9134-3951; Koç University Graduate School of Sciences and Engineering; Physics; 1674Publication Restricted Hamilton-Jacobi formulation of the thermodynamics of Einstein-born-infeld-ads black holes(Koç University, 2019) Ünlütürk, Kıvanç İbrahim; Dereli, Tekin; 0000-0002-6244-6054; Koç University Graduate School of Sciences and Engineering; Physics; 201358Publication Open Access Influence of three-dimensional reconstruction method for building a model of the cervical spine on its biomechanical responses: a finite element analysis study(Sage, 2016) Zafarparandeh, Iman; Erbulut, Deniz Ufuk; N/A; Özer, Ali Fahir; Faculty Member; School of Medicine; 1022In some finite element analysis studies of models of sections of the spine, the three-dimensional solid model is built by assuming symmetry about the mid-sagittal plane of the section, whereas in other studies, the model is built from the exact geometry of the section. The influence of the method used to build the solid model on model parameters, in the case of the cervical spine, has not been reported in the literature. This issue is the subject of this study, with the section being C2-C7, the applied loadings being extension, flexion, left lateral bending, and right axial rotation (each of magnitude 1 Nm), and the model parameters determined being rotation, intradiskal pressure, and facet load at each of the segments. When all the parameter results were considered, it was found that, by and large, the influence of solid model construction method used (exact geometry vs assumption of symmetry about the mid-sagittal plane of the section) was marginal. As construction of a symmetric finite element model requires less time and effort, construction of an asymmetric model may be justified in special cases only.Publication Restricted Machine learning assisted design of biomedicel high entropy alloys with low elastic modulus for orthopedic applications(Koç University, 2024) Özdemir, Hüseyin Can; Canadinç, Demircan; 0000-0001-9961-7702; Koç University Graduate School of Sciences and Engineering; Mechanical Engineering; 23433Publication Open Access Numerical investigation of design parameters effects on performance of cooling system designed for a lithium-ion cell(Yildiz Technical University / Yıldız Teknik Üniversitesi, 2020) Kızılel, Rıza; Alipour, Mohammad; Researcher; Koç University Tüpraş Energy Center (KUTEM) / Koç Üniversitesi Tüpraş Enerji Merkezi (KÜTEM); 114475; N/AA 3D numerical approach using the Finite Element Method (FEM) is applied to model the thermal behavior of multilayer 20Ah LiFePO4/Graphite cell and to design a cooling system. A three-dimensional multilayer cell model with heterogeneous thermal properties for the various cell layers is developed to study the effects of design parameters on cooling performance of mini-channel aluminum plates. As design parameters, effects of channel width, a number of channel passes, inlet mass flow rate, and heat transfer medium were considered. Using the optimized parameters, the cooling performance of water-cooling and air-cooling systems were compared. The results showed that the designed cooling system provided good cooling performance in controlling the temperature rise and uniformity. Inlet mass flow rate was the main influential parameter in controlling the cooling performance. The optimum number of channel passes was found to be seven passes. Channel width mainly controlled the pressure drop and had minor effects on temperature. At higher discharge current rates, the water-cooling system showed better cooling performance in dropping the maximum temperature and making uniform surface and inner temperature profile. Moreover, pressure drop, and power consumption rates become significantly lower for water cooling system.Publication Restricted Thermodynamics and kinetics of adsorption of platinum dimethyl cyclooctadiene on resorcinol-formaldehyde aerogel from supercritical carbon dioxide solution(Koç University, 2009) Yaşar, Nazire Seda; Erkey, Can; 0000-0001-6539-7748; Koç University Graduate School of Sciences and Engineering; Chemical and Biological Engineering; 29633Publication Restricted Tribological studies of a hermetic reciprocating compressor piston(Koç University, 2024) Shahzad, Aamir; Lazoğlu, İsmail; 0000-0002-8316-9623; Koç University Graduate School of Sciences and Engineering; Mechanical Engineering; 179391