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.
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Showing 1 to 20 of 915 for “"Junctions"”.
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Memristive tunnel junctions
… first chapter, we reveal that magnetic tunnel junctions fit in the recently emerged field of memristors and memristive systems. We describe how this 'hot topic' emerged from the combination of two research fields and take a step further by including magnetic systems. The somewhat illustrative …
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Quantum transport in Josephson junctions
Josephson junctions consist of two superconductors separated by some barrier, be it superconducting, ferromagnetic, or semiconducting. The striking feature of Josephson junctions is that for a phase difference between the two superconducting reservoirs, electrical current will flow between them. To …
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Cryogenic characterization of Josephson junctions
… description of superconductivity and Josephson junctions, two superconductors separated by a thin insulating battier. Two models of Josephson barriers are presented for use in analysis. The effect of self-induced magnetic field is considered. A numerical simulation is performed to justify …
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JOINT - critical junctions in architecture
Man still breathes both in and out. When is architecture going to do the same?... Take of your shoes and walk along a beach through the ocean's last thin sheet of water gliding landwards and seawards. You feel reconciled in a way you wouldn't feel if there were a forced dialogue between you and …
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Tunneling spectroscopy of magnetic tunnel junctions
In this thesis, magnetic tunnel junctions based on MgO barriers have been prepared and investigated. Different aspects were discussed, in order to understand the physical limitations to the TMR ratio of the MTJs and, hence, their performance as a basis of spintronic devices.
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Pressure losses at bends and junctions
… were performed to study the flow in bends and junctions, to determine whether the CFD simulations could yield accurate pressure loss data for input into a one-dimensional engine simulation code. The experiments were carried out on a steady flow rig, and three bends with varying degrees of …
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FUNCTIONAL REDOX-ACTIVE MOLECULAR TUNNEL JUNCTIONS
… This thesis focuses on the functional molecular junctions based on redox-active molecules and describes the relationship between the change of redox-states and how it affects the mechanism of charge transport and the electronic/supramolecular structures of the junctions. This thesis provides new …
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Mechanical regulation of cell-cell junctions
… examined Rac1 activation at nascent cell-cell junctions, and revealed qualitative correlations between measured cadherin binding affinities and the signal amplitude triggered by cadherin ligation. Second, I examined the role of the cytosolic protein α-catenin in E-cadherin-based adhesion and …
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Triple junctions and low angle boundaries
… material connect together at triple junctions. In this paper, we examine how the distribution of low angle boundaries at triple junctions varies with the texture of a material.
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Thermal activation of superconducting Josephson junctions
… quantum computing architectures. Josephson junctions are extensively used in superconducting quantum interference devices (SQUIDs) and in persistent-current qubit systems. Noise excitations, however, have a critical influence on their dynamics. Thus, the primary focus of this research was to …
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TGF-beta signaling at the cellular junctions
… wing epithelial cells and at the neuromuscular junctions. Cell culture studies have suggested that cells modulate morphogenetic signaling by expressing the receptors and secreting the ligand in spatially defined areas of the cell. Indeed, I have found that TGF-beta ligands, receptors and R-Smads …
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Roles of gap junctions in neuronal networks
This dissertation studies the roles of gap junctions in the dynamics of neuronal networks in three distinct problems. First, we study the circumstances under which a network of excitable cells coupled by gap junctions exhibits sustained activity. We investigate how network connectivity and …
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Quantum transport through conjugated organic molecular junctions
… the electronic transport properties of junctions consisting of a scattering region such as a nanoscale object or molecule connected to electrodes is the central basis for future nano and molecular scale applications. In this thesis, I shall discuss the theoretical methods needed to …
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Theory of quantum interference in molecular junctions
… of electronic devices. To create molecular junctions and probe their electrical properties, intense experimental efforts and theoretical studies are underway. For single molecule electronic applications, an important property is their electrical conductance. In this context, I start my …
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Regulation of cadherin adhesion at intercellular junctions
… of cadherin mediated adhesion at cell-cell junctions is crucial to our understanding of development and disease. This thesis focuses on the regulation of cadherin adhesion, which can be influenced by its extracellular domain interactions, ligand or antibody binding, post translational …
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E-cadherin mechanotransduction beyond cell-cell junctions
… This new mechanism is not confined to cadherin junctions alone, but triggers signals that globally alter cell mechanics and perturb distal focal adhesions. Using specific fluorescent reporters and chemical inhibitors, we defined key events in the specific signaling pathway that links E-cadherin …
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Josephson Junctions Fabricated by Focussed Ion Beam
… to Josephson junction fabrication. These junctions are created in low TC superconductor-normal metal bilayer tracks on a deep submicron scale using a Focused Ion Beam Microscope (FIB). The FIB is used to mill away a trench 50_nm wide in the upper layer of niobium superconductor (125 nm …
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