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 24 for “"Metallic elements"”.
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Sustainable methodologies to transform non-metallic printed circuit boards waste into value-added products
… more than 28-30% metal. While recycling, the metallic elements are dismantled and reused for its material value, however non-metallic elements are left untreated because of its complex amalgamation. This unprocessed non-metallic waste PCB is either incinerated or landfilled leaving all the …
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Comparison of theory and experiment for flexural-torsional buckling of laminated composite columns
… bars was originally developed and used for metallic elements. The theory was recently extended to laminated bars fabricated from advanced composite materials. The purpose of this research is to provide a study and assessment of the extended theory. The focus is on flexural and …
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Metalloid aluminum clusters with fluorine
… The fluorine can, in principle, oxidize the metallic elements, resulting in a system much like organic explosives where the fuel and oxidizer components are mere angstroms apart. We performed density functional theory calculations within the SIESTA code to examine the cluster binding energy …
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Synthesis, Characterization, Properties and Computational Studies of Linear Boronate Diester-Linked Materials
… the boronate esters when exposed to water. Metallic elements were also introduced into these boronate systems increasing the potential for future research on these compounds as optical materials and semiconductors. Another project which grew from efforts at controlling the electronic …
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Caracals as sentinels for metal exposure in a human-transformed landscape
… activity release large quantities of metallic elements and metalloids into the environment. Due to their toxicity, environmental persistence and bioaccumulative nature, these chemical pollutants threaten wildlife and human health. As urbanisation increases and top predators are forced …
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Development of protective coatings to improve high temperature corrosion resistance in chlorine containing environments based on an advanced corrosion risk assessment tool
… potential. The development of protective metallic coatings is one of the solutions that may be taken to promote the long-term resistance of structural materials involved in these processes. A helpful tool can be corrosion prediction diagrams for designing optimized coating compositions. …
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Electromechanical Phenomena in Superconducting and Normal Nanostructures
… of nanostructures made of superconducting and/or metallic elements. The first part of the work is devoted to the analysis of the interactions between the electronic and mechanical degrees of freedom in suspended nanowires. In particular, a metallic carbon nanotube fixed between two superconducting …
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Experimental studies of hybrid photonic band gap accelerator structures
… (HPBG) structure containing both dielectric and metallic elements. Dielectric elements have low loss and the potential to survive high surface electromagnetic fields. The HPBG structure was constructed as a triangular lattice array with sapphire rods inside and copper rods outside sandwiched …
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Local plastic deformation in pressure and tensile armour layers of flexible risers
… because of the helical geometry of many of the metallic elements such as pressure armour and tensile armour layers of a flexible riser. The general design philosophy of the layer is defined in API 17J (American Petroleum Institute) in terms of the stress "utilisation" factor that specifies the …
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Ab Initio Study of Amorphous Zeolitic Imidazolate Framework (A-ZIF) and Pyrophosphate crystals
… hydrogen bonding and bridging bonds are present. Metallic cations such as Mg, Zn and Cu form octahedral bonding with O. Metallic elements can influence the structure and bonding to certain extent. The two Cu-containing phosphates show the presence of narrow metallic bands near the valence band …
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Study of microstructure evolution in F/M steel T91 by in-situ synchrotron wide-angle X-rays scattering
… had higher C and N concentration than that of metallic elements. OM revealed the martensitic plates and ferrites in T91 after polishing and etching. Lastly, TEM experiment was also carried out using Focused Ion Beam (FIB) prepared specimen to characterize precipitates, dislocations and other …
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Seismic design of energy dissipation systems for optimal structural perfromance
… dampers, (2) viscoelastic dampers, (3) yielding metallic dampers and, (4) friction dampers. For each type of energy dissipation system, the study presents the (a) formulation of the optimal design problem, (b) consideration of several meaningful performance indices, (c) analytical and numerical …
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Investigation of nutrient solutions for the hydroponic growth of plants
… allowing optimal control over the supply of elements to the plant. In hydroponics, nutrient can be delivered via a solution that is supplied to the growing plant or as a seed coat or treatment that is applied to the seed before sowing and germination. The form in which the nutrients are …
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Development and Calibration of Reaction Models for Multilayered Nanocomposites
… sputter deposited alternating layers of distinct metallic elements. Specifically, we focus on the equimolar Ni-Al and Zr-Al multilayered systems. Computational models are developed to capture the transient reaction phenomena as well as understand the dependence of reaction properties on the …
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Assessment of In-situ Corrosion Conditions at Nevada Mechanically Stabilized Earth Wall Sites: Using Electrochemical Soil Characteristics and Linear Polarization Resistance
… facing panel, specified backfill, reinforcing elements, and the retained fill. The interaction of the backfill with the reinforcements, and the reinforcements with the facing panels, produces a system that when properly designed, can be a cost effective engineering solution. In Nevada there are …
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