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 78 for “"Number of Layers"”.
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Novel approach towards 1D resistivity inversion using the systematically-determined optimum number of layers
Determining the correct number of layers as input for ID resistivity inversion is important for constructing a model that represents the subsurface accurately. Current common methods to select the number of layers are performed in one of three ways: by trial-and-error and choosing the best model …
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New Algorithms and Bounds for Multilayer Channel Routing
… (CRP). New algorithms are presented in which the number of layers is a parameter of the problem, and the area of the solution improves as the number of layers is increased.
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Size effects on self-assembly and melting of silver-alkanethiolate on inert surfaces
… and compared. It is revealed that the size of the Ag substrate has a significant role in the self-assembly process and determines the reaction products. Alkanethiol adsorbs on the surface of Ag continuous planar thin films and only forms self-assembled monolayers (SAMs), while the reaction …
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Projeto de reforço de pavimentos rodoviários e aeroportuários pelo método da resiliência: uma nova versão do programa TECNAPAV
… It is based on models developed from the Theory of Elasticity, either existing solutions for linear elasticity or from non-linear elasticity. The computer program TECNAPAV used for pavement management system was extended in order to take into account loads heavier than the standard 80kN-axle load …
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Numerical Methods for the Electromagnetic Modeling of Microstrip Antennas and Feed Systems
The importance of low-cost printed circuit antennas has brought about a continued effort to improve and simplify the analysis of multilayered or stratified media. This thesis derives the dyadic Green functions for the electromagnetic fields in a multilayered medium and shows their relationship to …
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Effect of Stacking Sequence and Fiber Orientation on the Stress-Strain Behavior of CFRP Confined Concrete Cylinders
A limited number of studies have been conducted in the literature to examine the effect of stacking sequence and fiber orientation on the compressive behavior of fiber reinforced polymer (FRP) confined concrete. This thesis presents the results of an experimental investigation examining the effect …
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Optical Characterization of chemically doped and/or intercalated thin layers graphene: Raman and Contrast Study
… in chemically doped and/or intercalated thin layers of graphene with halogen gases, FeCl₃ and alkali metals. The first chapter introduces graphene and graphite intercalation compounds (GICs). It will also briefly explain Raman of the graphitic compounds including GICs. The second chapter …
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Crashworthiness capability of jute and glass fibre reinforced epoxy tubes under quasi-static loading condition for automotive application
… This study examined the potential utilization of jute in the crash energy absorption. A combination of hand layup and vacuum bladder technique was kused to search the influence of utilizing jute fibre on crashworthiness parameters of composite materials. To improve the mechanical properties, …
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ΕΠΙΛΥΣΗ ΤΟΥ ΠΡΟΒΛΗΜΑΤΟΣ ΣΚΕΔΑΣΗΣ ΑΠΟ ΣΚΕΔΑΣΤΗ ΤΥΧΑΙΑΣ ΓΕΩΜΕΤΡΙΑΣ ΜΕΣΑ ΣΕ ΣΤΡΩΜΑΤΟΠΟΙΗΜΕΝΟ ΜΕΣΟ ΜΕ ΤΗΝ ΒΟΗΘΕΙΑ ΤΩΝ ΔΥΑΔΙΚΩΝ ΣΥΝΑΡΤΗΣΕΩΝ GREEN
IN THE PRESENT THESIS THE PROBLEM OF SCATTERING BY A DIELECTRIC SCATTERER LOCATED INSIDE A STRATIFIED MEDIUM IS TREATED, BOTH ANALYTICALLY AND NUMERICALLY. THE ANALYSIS MAKES USE OF DYADIC GREEN'S FUNCTIONS (DGF), THE THEORY AND PROPERTIES OF WHICH ARE THOROUGHLY INVESTIGATED. IN THE FIRST PART OF …
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Framework for a Context-Switching Run-Time Reconfigurable System
The reprogrammable nature of configurable computing machines has led to a wealth of research in run-time reconfigurable systems and applications. A limitation often encountered in this research is the slow configuration time with respect to the system clock speed. One technique to deal with these …
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Probability-based stability analysis of a laminated composite plate under combined in-plane loads
The probabilistic stability of a laminated composite plate is investigated. Three different models are considered in this study, namely, the classical laminated plate theory, a first-order shear deformation theory, and a higher-order shear deformation theory. The probabilistic characteristics, such …
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Structure Characterization and Electronic Properties Investigation of Two-Dimensional Materials
… dimensional materials will be presented. The aim of this review is to elaborate on different types of defects in two dimensional (2D) materials like graphene and transition metal dichalcogenides (TMDs). First, different types of point and line defects, e.g. vacancies, anti-sites, guest elements, …
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Light scattering models for real-time bacteria characterisation in water based environments.
… can be said to be small particles in terms of their volume and can be modelled as near-index particles when the average refractive index of their body is close to that of the medium in which they are suspended. This is the case with water based environments whereas the bacterial scatterer is …
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Critical size for bulk-to-discrete transition and segment-induced size effect melting of 2D aliphatic layers
Size miniaturization of aliphatic layers is of interest in the fundamental understanding of their structure-property-relationship. This research studies the size-dependence of structure evolution and thermodynamic principles in a model system of silver alkanethiolate (AgSCn), which consists of …
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Dynamic instability of composite laminated plates
… strain-displacement relationship. The regions of instability for the resulting set of coupled Mathieu equations are obtained using a method of simultaneous diagonalization. Boundary frequencies generated using a first subdeterminant approximation to the infinite determinant are compared with …
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The Interplay of Magnetism and Topology in Topological Insulators
… last decade as a means towards the development of low-energy electronic and spintronic devices. Unfortunately, development of TI devices have been hampered by issues such as impurities and difficulty in fabrication, meaning that they are no closer to replacing traditional semiconductor platforms …
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Electronic, optical, mechanical and thermoelectric properties of graphene
Graphene, a two-dimensional allotrope of graphite with sp^2 bonded carbon atoms, is arranged in honeycomb structure. Its quasi one-dimensional form is graphene nanoribbon (GNR). Graphene related materials have been found to display excellent electronic, chemical, mechanical properties along with …
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Volumetric Attribute Compression for 3D Point Clouds using Feedforward Network with Geometric Attention
… where $\hat{\theta}$ is a quantized version of $\theta$. Extending a previous work Region Adaptive Hierarchical Transform (RAHT) that employs piecewise constant functions to span a nested sequence of function spaces, we propose a feedforward linear network that implements higher-order …
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Evaluation of a heated-air airship for the environment of Titan
Future exploration of Saturn's moon Titan can be carried out by airships, which have the capability to study the atmosphere as well as the capability to land and study the surface at multiple locations. Several lighter-than-air gas airships and passive drifting heated-air balloon designs have been …
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Analysis of Composite Helmet Impact by the Finite Element Method
… the finite element method transient deformations of a helmet mounted on a Roma Plastilina #1 clay-filled rigid and stationary headform. The helmet is made of a unidirectional fiber reinforced composite that is modeled as a linear elastic orthotropic material. Hashin's criteria are used to simulate …
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