Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 25 for “"EQUILIBRIUM CONFIGURATIONS"”.
-
Equilibrium configurations of oxygen bubbles on surfaces for applications in nanostructured hematite electrodes
… in this work to facilitate the understanding of equilibrium configurations of oxygen bubbles on a nanostructured hematite electrode. The equilibrium configurations are computed using Surface Evolver, a program which models surfaces shaped by various constraints and forces. A nanorod with a top …
-
Location of stable and unstable equilibrium configurations using a model trust region quasi-Newton method and tunnelling
… and a homotopy method for locating multiple equilibrium configurations has been proposed recently. The hybrid method combined the efficiency of a quasi-Newton method capable of locating stable and unstable equilibrium solutions with a robust homotopy method capable of tracking equilibrium …
-
Essays on Network formation games
… Chapter 2 studies the possible Nash equilibrium configurations in a model of signed network formation as proposed by Hiller (2017). We specify the Nash equilibria in the case of heterogeneous agents. We find 3 possible Nash equilibrium configurations: Utopia network, positive …
-
ΑΝΑΛΥΤΙΚΗ ΚΑΙ ΑΡΙΘΜΗΤΙΚΗ ΜΕΛΕΤΗ ΤΩΝ ΠΕΡΙΟΔΙΚΩΝ ΛΥΣΕΩΝ ΤΟΥ ΠΡΟΒΛΗΜΑΤΟΣ ΤΩΝ ΤΡΙΩΝ ΣΩΜΑΤΩΝ
… AND THREE-DIMENSIONAL, AROUND THE LAGRANGIAN EQUILIBRIUM CONFIGURATIONS, WHILE THE SECOND PART (CHAPTERS 6TO 8) IS DEVOTED TO THE NUMERICAL DETERMINATION OF THE THREE-DIMENSIONAL SYMMETRIC PERIODIC SOLUTIONS OF THE PROBLEM IN GENERAL. (SHORTENED)
-
Manipulation and mechanics of thin elastic objects
In this thesis, multiple problems concerning the equilibrium and stability properties of thin deformable objects are considered, with particular focus given to the analysis of thin elastic rods. The problems considered can be divided into two related categories: manipulation and mechanics. First, a …
-
Parametric Modeling of Deformable Linear Objects for Robotic Outfitting and Maintenance of Space Systems
… space systems. Cables often have a non-zero bend equilibrium configuration, which the majority of DLO research does not consider. This dissertation implements a model-based optimization approach to estimate cable configuration, where a design parameter of the model's discretization level enables …
-
Computer simulations of cellular movements
… can be reached from radically different initial configurations, such as allowing tissue masses of both cell types to touch at one point. The final configuration is attained as the external tissue mass engulfs, or spreads around, the internal tissue mass. A hypothesis has been proposed by …
-
Catenaries in Viscous Fluid
… a variety of rich behaviors. Here we study the equilibrium shapes of perfectly flexible strings that are moving with a uniform velocity and axial flow in viscous fluid. The string is acted upon by local, anisotropic, linear drag forces and a uniform body force. Generically, the configurations of …
-
Tearing-mode transport model in the reversed field pinch concept
… The study has been focused on determining equilibrium configurations which describe a plasma evolution dominated by particular instabilities originated by plasma electrical resistivity (tearing-, or resistive interchange, modes). The ultimate goal is to provide a model of transport scaling …
-
Pattern synthesis and perturbation in tessellation automata
… given and fall into two classes; restoration of equilibrium configurations and self-diagnosis. Restoration results demonstrate the existence of configurations which will immediately restore themselves following any single perturbation. Results obtained for self-diagnosis show that any single …
-
Analysis and control of marine cable systems
… approach is developed to predict the equilibrium configurations of marine cables. One-dimensional dynamics Using a coordinate transformation, the method can predict the unsteady dynamic behaviour of systems where the length of cable varies. Two-dimensional dynamics The methodology …
-
Morphodynamics of multi-thread rivers Theory and Observations of Channel Loops
… that the bifurcates do not obey a regime equilibrium configuration by which the channel carrying more water and sediment is also larger. The second part then deals with the mechanisms underlying the equilibrium configurations of bifurcations, especially how the channel width differences …
-
Equilibria and oscillations of magnetised neutron stars
We investigate equilibrium configurations and oscillation spectra of neutron stars,<br/>modelled as rotating magnetised fluid bodies in Newtonian gravity. We also explore<br/>the idea that these model neutron stars could have dynamics analogous to rigid-body<br/>free precession.<br/><br/>In …
-
Spatial statistical-physical systems
… less preference of 1, the system tends to an equilibrium that approximates the Steiner tree structure. For two- to four-anchor cases, we calculate the theoretical equilibrium configurations, and in particular for three and four anchors, the positions of the Steiner points. For one-anchor case, …
-
Crack Path Bifurcation at a Tear Strap in a Pressurized Stiffened Cylindrical Shell
… to flap open. The STAGS analysis for the static equilibrium configurations of the fractured shell include geometric nonlinearity and elastic-plastic material behavior. The crack tip opening angle (CTOA) is used in the criterion for ductile crack growth, and the critical value of the CTOA is …
-
Application of numerical methods to dislocation modeling of creep
… and Lothe for stress fields of such segments. Equilibrium configurations of the boundary under increasing applied stress are found by minimizing the sum of the squares of the glide shear stress at each segment endpoint over the boundary configuration. Minimization is done with a …
-
Experiments in quasi-static manipulation of an elastic rod
… Any curve traced by this wire when in static equilibrium can be described as the solution to an optimal control problem with boundary conditions that vary with the position and orientation of each gripper. Recent work has shown that the set of all local solutions to this problem over all …
-
Forced oscillations in simple and binary gas atmospheric models
… a binary gas system, where he compared different equilibrium configurations. This statical treatment again ignores the damping effects on mass flow. D.G. Parkyn reduced the problem in idealised form to that of investigating the effect of a travelling temperature wave at the base of a viscous, heat …
-
Leveraging numerical relativity formulations for perturbative analysis: applications to quasinormal modes in general relativity
… for understanding small deviations from equilibrium configurations, offering insights into gravitational wave emission, stability, and fundamental mode structures of relativistic systems. Despite their complementary strengths, numerical relativity and perturbation theory are often treated …
-
Quasi-Newton algorithms for large scale nonlinear systems
… least squares approach and in locating multiple equilibrium configurations using deflation speaks for the versatility of the proposed algorithm. In conclusion, the quasi-Newton algorithm proposed in this dissertation is both robust and efficient for small as well as large scale problems of …
Page 1 of 2