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 20 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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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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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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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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Non-volatile organic memory devices: from design to applications
… organic memory elements based on resistive switching. The activity has been carried out in the frame of the European project “HYbrid organic/inorganic Memory Elements for integration of electronic and photonic Circuitry” (HYMEC), which involved the University of Cagliari during the last …
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Effects of non-planar distortions in porphyrin compounds on their properties and functionality
… potentially allowing several driving and switching mechanisms for rotation. Computer simulations were here used to explain the unusual experimentally observed rotational behavior of aryl substituents on porphyrins. Meso aryl rotational barriers might be expected to be much higher in …
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ΕΠΙ ΤΗΣ ΕΝΕΡΓΟΠΟΙΗΣΕΩΣ ΤΗΣ ΕΜΒΡΥΙΚΗΣ ΑΙΜΟΣΦΑΙΡΙΝΗΣ ΕΙΣ ΤΟΝ ΕΝΗΛΙΚΟΝ
… THROUGHOUT THE ADULT LIFE. KNOWLEDGE OF THE MECHANISMS OF REGULATION OF GLOBIN GENE EXPRESSION IS VERY INTERESTING BECAUSE OF THE ELACIDATION OF THE PHENOMENON AND THE PRACTICAL APPLICATION IN THE VARIOUS HEMOGLOBINOPATHIE IN THE PRESENT WORK WE DESCRIBE EXPERIMENTS (IN VIVO AND IN VITRO) …