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 23 for “"switching mechanisms"”.
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Switching mechanisms, electrical characterisation and fabrication of nanoparticle based non-volatile polymer memory devices.
… and much ambiguity concerning the working mechanisms behind many of these PMDs, which is impeding their development. This research explores some of these many unanswered questions and presents new experimental data concerning their operation. One prevalent theory for the conductivity change …
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Investigation of the electroforming and resistive switching mechanisms in Fe-doped SrTiO 3 thin films
… To study the influence of the interfaces on the switching properties of SrTiO3 thin films, epitaxial films of Fe-doped SrTiO3 were grown on different bottom electrodes (SrRuO3, LaNiO3 und Nb:STO) by a “Pulsed Laser Deposition” technique. An atomic force microscope equipped with a conductive tip …
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Macroscale Design and Modeling of Multifluidic Cantilever Devices for Advanced Nanoscale 3D Printing Applications
… macroscale models of three potential fluid switching mechanisms/devices that can be implemented onto the existing nanoscale 3D printer to accommodate the use of multiple materials in a desired print. The project will develop designs of different potential fluid switching mechanisms, model …
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Magnetic properties of lithographically patterned thin film magnetic elements for magnetic random access memory applications
… the patterned elements, including magnetization switching mechanisms, switching field distribution, magnetic thermal stability, and magnetostatic interactions, have been studied using magnetic force microscopy (MFM), SQUID magnetometer, alternating gradient magnetometer (AGM) and vibrating sample …
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An Approach to Near Field Data Selection in Radio Frequency Identification
… data access settings. Similar to other proposed switching mechanisms, it offers advantages that may greatly improve outcomes. RFID use is increasing in identity documents such as drivers' licenses and passports, and with it concern over the theft of personal information, which can enable …
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Current-induced Dynamics of Easy-Plane Antiferromagnets
… dynamics, especially the spin-orbit-torque switching dynamics. To realize a practical antiferromagnetic memory device, we must overcome the challenge. In this PhD Thesis, I discussed about the systematic and quantitative study of a model material, collinear easy-plane antiferromagnetic …
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Hybrid System Identification of Manual Tracking Submovements in Parkinson's Disease
… can yield insight into underlying neurological mechanisms and therefore into potential treatment strategies. We focus on characterizing submovements through Hybrid System Identification, in which the dynamics of each submovement, the mode sequence and timing, and switching mechanisms are all …
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Formation and Rupture of Nanofilaments in Metal/TaOx/Metal Resistive Switches
… scaling potential, low power consumption, high switching speed, good retention and endurance properties. Although, various mechanisms have been proposed to explain the switching behavior in CBRAM devices, i.e. metal ion migration and subsequent formation and rupture of conductive filament, …
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An Integrated Software System for EEG/EMG-Based Forward Genetic Screen of Sleep/Wake Abnormalities in ENU-Mutagenized Mice
… neural circuitry and chemistry for sleep/wake switching mechanisms have been increasingly revealed in recent years. However, the very fundamental mechanism of sleep regulation remains a mystery, for example, with the question of what is the neural substrate for “sleepiness” still unanswered. My …
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Analysing the requirements for monitoring and switching: A problem-oriented approach
… requirements. Specifying monitoring and switching in such applications can be difficult due to their dependence on varying environmental properties. Two problems require analysis: the detection of changes in the operating environment to assess their impact on requirements satisfaction, …
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Design, synthesis, and testing of novel organic oligomers for use as molecular-scale electronic devices
… were found to exhibit reproducible bistable switching behavior with an on-off ratio of > 10:1 at room temperature when biased between metal electrodes. The synthesis of orthogonally functionalized oligomers has resulted in compounds containing functionalities on one end known to form ordered …
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Modeling and Simulation of MEMS Devices
… an impact microactuator. Three different on-off switching mechanisms are identified for the Mita microactuator. These mechanisms also generalize to arbitrary impacting systems with a similar nonlinearity. A local map based on the concept of discontinuity mapping provides an effcient and accurate …
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Bistability and Electrical Characterisation of Two Terminal Non-Volatile Polymer Memory Devices.
… previous investigation into the internal working mechanisms of polymer memory devices and increases understanding and verifies the principles of these mechanisms through testing previously untested materials in different material compositions. This study makes a novel contribution by testing the …
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Investigation of electrical, optical and mechanical control of ferroelectric domains using scanning probe microscopy
… KNBNNO is also found to illustrate mechanical switching under atomic-force microscopy (AFM) tip pressure (> 0.4 μN). It is found that tip pressures higher than 3 μN can cause permanent deformation of the sample surface. The optical response of the materials is found to be influenced under the …
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Scalable base station switching framework for green cellular networks
… savings whilst guaranteeing QoS, innovative BS switching mechanisms need to be developed. This thesis presents a novel BS switching framework which improves energy efficiency (EE) in comparison with existing approaches, while guaranteeing the minimum QoS and seamless services. The major …
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Mechanisms, Conditions and Applications of Filament Formation and Rupture in Resistive Memories
… memory (RRAM), based on a two-terminal resistive switching device with a switching element sandwiched between two electrodes, has been an attractive candidate to replace flash memory owing to its simple structure, excellent scaling potential, low power consumption, high switching speed, and good …
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Investigation of polarization switching over broad time and field domains in various ferroelectrics
Investigations of polarization switching over broad time and electric field domains, in various modified Pb-based perovskite ferroelectrics, were systematically performed by ferroelectric switching current transient and bipolar drive P-E responses. Studies were performed from E«Ec to E»Ec, where Ec …
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Efficient admission control and routing for resilient communication networks
… of the state of the art of quality of service mechanisms in communication networks and proposes a categorization of admission control (AC) methods. These approaches are investigated regarding performance, more precisely, regarding the potential resource utilization by dimensioning the capacity …
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Resistive switching in Cu:TCNQ thin films
… Flash in future CMOS generations. Resistive switching materials, which can be incorporated in simple metal-isolator-metal (MIM) structure, are especially promising due to their auspicious scaling properties. Various different materials are studied in terms of their compatibility to standard …
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Under the influence: Understanding the thermodynamic and optical properties of stimuli-responsive complex organic systems
… techniques around to examine the underlying mechanisms, high-level quantum-chemical approaches are often crucial for a final and conclusive interpretation of one’s experimental results. The aim of this thesis is to examine the broad scope of stimuli-responsive molecular aggregates and …
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