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 57 for “"layered structures"”.
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Modeling dynamic impact of layered structures
Multilayered metals have been shown to display unusual strength as compared to bulk materials because interfaces act as barriers to slip transmission. Results from atomistic studies of mechanical properties of material interfaces can be combined with continuum mechanics approaches to simulate …
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Giant Magneto-impedance Effect In Thin Film Layered Structures
… Correlation of the magnetic properties of the structures was studied with the impedance responses.
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Study of dynamic behaviour of multi-layered structures subjected to blast loading
… research work is to assess the response of multi-layered plates in comparison to single plates to gain physical understanding of different phenomena taking place at micro level during localized blast loading. Since layered plates have been shown to give improved ballistic performance under certain …
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Axisymmetric stress wave propagation in weakly coupled layered structures: Analytical and computational studies
Stress wave propagation in layered systems with infinite and finite numbers of isotropic layers is investigated. A transfer matrix formulation for the axisymmetric problem is developed using a double integral transform technique and a symbolic algebra system. The propagation and attenuation zones …
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Surface Acoustic Waves Propagation and Coupling Fields in Piezomagnetic and Piezoelectric Semiconductor Layered Structures
… mechanism of coupled waves in composite structures are explained, and the electromechanical (ME) coupling responses with multi-physical fields are analyzed, which is of guiding significance for the design of magnetically related SAW devices and piezotronic devices. The main studies …
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Markov-Airy method for electromagnetic fields in layered structures and microsphere-stabilized planar resonators
… the behavior of electromagnetic fields in layered structures is presented. Based upon keeping track of reflections throughout the structure, this technique is a special case of the method of moments. Analysis of layered scatterers, waveguides, and resonators is presented for structures …
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Synthetic aperture radar-based techniques and reconfigurable antenna design for microwave imaging of layered structures
… applications such as nondestructive testing of layered composite structures, through-wall and medical imaging require more advanced imaging systems and image reconstruction algorithms (post-processing) suitable for imaging inhomogeneous (i.e., layered) media. Currently-available imaging …
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Raman spectroscopy of layered cultural heritage materials
“Raman Spectroscopy of Layered Cultural Heritage Materials” is a dedicated PhD thesis on Raman spectroscopy and its applications with a special focus on the non-invasive and non‑destructive analysis of layered structures in works of art. It combines the concepts of direct and stratigraphic …
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I. An oxygen-17 NMR study on oxygen exchange in yttrium barium(2) copper(3) oxygen(7-x). II. Synthesis of transition metal polysulfide complexes from metal powders
… in that both are superconductors containing layered structures and mixed valent copper centers. Our studies on YBa$\sb2$Cu$\sb3$O$\sb{\rm 7-x}$ focused on $\sp{17}$O-labelling of samples of $\rm YBa\sb2 Cu\sb3 O\sb{7-x}$ and the $\sp{17}$O NMR studies of these samples. The …
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Nanometer-thick yttrium iron garnet film development and spintronics-related study
… of sandwich-like NM/YIG/NM or NM/YIG/TI structures. Such tri-layered structures will facilitate various interesting fundamental studies as well as device developments. The demonstration of a magnon-mediated electric current drag phenomenon is presented as an example for such tri-layered …
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Optoelectronics of graphene-based Van der Waals heterostructures
… field in condensed matter physics. They are layered structures with strong chemical bonding within layers and relatively weak van der Waals force to combine layers together. This unique layer-bylayer nature makes it easy to exfoliate layers out and at the same time to re-assemble in arbitrary …
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Control of Sound Radiation From Structures with Periodic Smart Skins
… theories are then extended to the case of multi-layered structures in order to understand the behavior of a beam loaded with a periodic skin. In order to design the beam and skin structural periods, two different methods are used: Galois sequences and an optimization process using a real-valued …
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Benthic mineralization and microscale heterogeneity
… marine sediments are viewed as horizontally layered structures. However, in recent decades there has been growing awareness of the naturally occurring microscale heterogeneity affecting the biogeochemical functioning. Studies on microscale dynamics have been facilitated by recent developments …
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Characterization, modeling, and simulation of multiscale directed-assembly systems
… arbitrarily complex and interconnected multi-layered structures with custom chemical, biologically or environmentally-responsive, electronic, or optical properties. We construct mathematical models and interpret data from direct-assembly experiments via application and augmentation of …
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Computer simulation of electron transport in solids with applications to materials analysis and characterization
… of thin surface films -- even in case of multi-layered structures, and so on. Regarding the secondary electron emission, MC simulation can be used for the study of image contrast in silicon p-n junctions, for line-scan calculations of resist materials with given geometrical cross-sections …
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Large-scale density functional theory study of van-der-Waals heterostructures
… of a comprehensive body of knowledge on such layered structures. However, the goal of this thesis is to deepen the understanding of the comparatively unknown heterostructures composed of different stacked layers. First, we utilise linear-scaling density functional theory (LS-DFT) to simulate …
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In-situ production of electrically conductive polyaniline fibres from polymer blends
… composite. It is remarkable, however, that layered structures of the conducting filler were also formed within the matrix material. The latter morphology, particularly observed in compression moulded specimens of a specific polymer system, was also in good agreement with that inferred by …
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Mathematical Modelling of Smectic Liquid Crystals
… cylindrical (i.e. polar) and spherical layered structures in uniform and irregularly contrasted domains. In these cases, strong and weak director anchoring at the boundaries is applied.<br/><br/>The reorientation of the liquid crystal layering structure is predicted through the …
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Current flow in inhomogeneous superconductors
… (SN) junction as well as NSN, SNS, and layered structures SNSN... as occur with a static electric field applied normal to the boundaries is calculated. The results for the self-consistent currents and fields are found to be the same in certain limits as those found by other investigators …
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Experimental and computational analysis of random cylinder packings with applications
… Carlo technique) to generate different packing structures. 3D random packing limits were explored, and the packing structures were quantified by their positional ordering, orientational ordering, and the particle-particle contacts. Furthermore, the void space in the packings was expressed as a …
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