Minimizing Carbon Emissions in Metal Forming
Thesis (Master, Mechanical and Materials Engineering) -- Queen's University, 2009-12-19 16:39:12.071
Materials Literature
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Direct injection gasoline engine particulate emissions
Direct fuel injection technology is increasingly being applied to the spark ignition internal combustion engine as one of the many actions required to reduce the CO2 emissions from road transport. Whilst the potential for CO2 reductions is compelling, the technology is not without disadvantages. Early examples typical…
Aqueous surface chemistry of Goethite : adsorption and desorption reactions involving phosphate and carboxylic acids
Phosphorus is an essential element for all known forms of life. In the form of phosphate, this nutrient is retained in soils and sediments by sorption on mineral particles, clays and other soil constituents. In addition, phosphate precipitates with metal ions to form a range of phosphate containing minerals, and only…
Thermodynamic description of the Fe-C-Cr-Mn-Ni-O system
The Fe-C-Cr-Mn-Ni-O system is of fundamental importance when describing the influence of oxygen on high alloyed steels. Both solid and liquid phases are of great interest: The solid phases regarding oxidation processes like the formation of oxide layers, inner oxidation, sintering processes and high temperature corros…
Optimization of bioplastics production from cheese whey
Dissertation presented in partial fulfillment of the requirements for the degree of Master in Biotechnology
Myeloma antioxidant status: the good, the bad and the reactive
Reactive oxygen species (ROS), which include free radicals such as superoxide (O2−) and hydroxyl radicals (HO•), as well as non-radical molecules such as hydrogen peroxide (H2O2), are constantly be...
The Origin, Genetic Diversity and Taxonomy of the Invasive Diatom Didymosphenia geminata (Bacilliariophyceae) in New Zealand
This thesis describes an investigation of the origin, genetic diversity and\ntaxonomy of Didymosphenia geminata, in New Zealand. D. geminata,\ncommonly known as Didymo or Rock Snot , is a freshwater diatom, a\nphotosynthetic alga with a silica shell. It attaches to rocks and plants by its\nmucilaginous stalks, its lar…
Full frequency-dependent phase-domain modelling of transmission lines and corona phenomena
This thesis presents two main developments in the modelling of power transmission lines for the simulation of electric networks. The first one is a wide bandwidth circuit corona model and the second a phase-domain multiphase full frequency-dependent line model. The latter can be easily used in connection with the form…
Material and structural performance of fiber-reinforced polymer composites at elevated and high temperatures
As the range of applications for fiber-reinforced polymer (FRP) composite materials in civil engineering constantly increases, there is more and more concern with regard to their performance in critical environments. The fire behavior of composite materials is especially important since complex physical and chemical p…
Niektóre aspekty badań palności kompozytów polimerowych
Podczas spalania polimerów wydziela się dużo energii, dymów oraz gazowych produktów, mających często właściwości toksyczne. Dlatego palność większości polimerów ogranicza ich stosowanie do wytwarzania niektórych wyrobów dla zastosowań obronnych i cywilnych. Omówiono podstawowe kryteria i metody badań polimerów w aspek…
Reversible Addition–Fragmentation Chain Transfer Polymerization
Abstract This article reviews the mechanistic and practical aspects of free radical polymerization with reversible addition–fragmentation chain transfer—the reversible addition–fragmentation chain transfer (RAFT) process. RAFT is conducted by the addition of a thiocarbonylthio compound (ZC(S)SR) to a conventional rad…
Modeling of thermomechanical and metallurgical phenomena in steel strip during hot direct rolling and runout table cooling of thin-cast slabs
The present research was directed at adequate prediction of the temperature, deformation behavior (roll force, flow stress, strain and strain rate) and micro structural evolution (recovery, recrystallization, grain growth, austenite and ferrite grain sizes) during rolling in the Compact Strip Production (CSP) process,…
Heat transfer analysis of the plasma spray deposition process
A novel approach has been used to analyse the flow of heat during the plasma spray coating process. The approach couples heat transfer processes occurring at the micro scale, within the coating, and at the macro scale, in the substrate, using a combination of finite-element and finite-difference based models. One of t…
[Spectra analyses of chitosans degraded by hydrogen peroxide under optimal conditions].
Chitosans with different average molecular weight (1,500-156 kDa) were prepared under optimal conditions based on our previous research by the depolymerization of initial chitosan using hydrogen peroxide, with maintaining the native structure of natural chitosan as principal consideration. Nitrogen and Carbon componen…
[Progress on antitumor effects of Marsdenia tenacissima].
The article reviewed the progress in the research of antitumor activities and mechanisms of Marsdenia tenacissima. Its origin producing area and antitumor constituents were analyzed. The herb possessed extensive antitumor effects in experimental and clinical applications. It provides theoretical evidences for study on…
Rigid bonded glass ceramic seals for high temperature membrane reactors and solid oxide fuel cells
Rigid bonded glass ceramic seals for high temperature membrane reactors and solid oxide fuel cells
Mechanisches Verhalten metallischer Werkstoffe über weite Bereiche der Dehnung, der Dehnrate und der Temperatur
In this work the mechanical behaviour of the aluminium alloy AA6060 and the steel 42CrMo4 each of them in two different heat treatment conditions was analysed at quasi-static strain rates up to high dynamic loading at temperatures from RT up to 400°C for the aluminium alloy respectively 800°C for the steel. For the ex…
The nature and characteristics of particles produced by EUV sources:exploration, prevention and mitigation
The demand for ever smaller and faster electronic devices is a drive for the IC and memory industry to make smaller and more complex features. Lithography is a crucial step in the production of these electronic components. In order to fulfill the demand of the market, the resolution of the features printed with lithog…
Capacitors for Power Electronics
This chapter contains sections titled: Introduction The various components of the capacitor — description Stresses in a capacitor Film capacitors Impregnated capacitors Electrolytic capacitors Modeling and use of capacitors Ceramic capacitors Specific applications of ceramic capacitors in power electronics R&D perspec…
Monte-Carlo Ray-Trace Modelling of Quantum Dot Solar Concentrators
Due to the finite resources of fossil fuel and nuclear reserves, renewable energy technologies much provide an increasing proportion of future energy needs, if the world’s population are to expect a secure and sustainable developed society. Quantum dot solar concentrators (QDSCs) can potentially reduce the cost of pho…