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.
Results
Showing 1 to 20 of 25 for “"CMAS"”.
-
The effect of sintering and CMAS on the stability of plasma-sprayed zirconia thermal barrier coatings
… by calcia-magnesia-alumina-silica (CMAS) deposits. The effect of sintering-induced stiffening on the driving force for spallation of plasma-sprayed (PS) TBCs was investigated. Spallation lifetimes of TBC specimens sprayed onto alumina substrates were measured. A simple fracture …
-
Thermal Evolution of MAS, YSZ and GZO Thermal Barrier Coating Materials in Benign and CMAS Rich Environments
… specifically calcia-magnesia-alumina-silica (CMAS) mixtures, was explored. YSZ exhibited significant deterioration in the presence of CMAS, with solution-reprecipitation leading to the occurrence of the tetragonal-to-monoclinic phase transformation and a rise in stiffness. In contrast, MAS and …
-
In-Situ Investigations of Calcium-Magnesium-Aluminosilicates (CMAS) Infiltration Effects on Thermal Barrier Coatings Under Extreme Environments Replicating Jet Engines
<p>Calcium-magnesium-aluminosilicate (CMAS) particulates, such as sand or volcanic ash, are ingested by gas turbine jet engines during operation. When operating within high abundance regions, these particulates negatively interact and degrade the high temperature thermal barrier coatings (TBC) …
-
Spectroscopic Studies of Excited States in Carbene-Metal-Amide Emitters
… active area of research. Carbene-Metal-Amides (CMAs) are a recent class of organometallic semiconductors with proposed applications in high-performance OLEDs. Fast triplet harvesting in CMAs occurs through thermally activated delayed fluorescence (TADF). In contrast to usual TADF emitters, CMAs …
-
An investigation of organizational-professional conflict in management accounting
… of the variance in turnover intent for non·CMAs, 23 percent for CMAS; and it explained 15 percent of the variance in job satisfaction for non-CMAS, ll percent for CMAS. The hypothesized antecedents of OPC explained 38 percent of the variance in OPC for non·CMAs, 45 percent for CMAS. The …
-
Investigation into the Molecular Biology of Human Genetic Sensory Disorders of Painlessness and Itch
… The author discovered a novel mutation in *CMAS* in three unrelated families with CIP phenotypes, hence supporting *CMAS* as a strong candidate gene causing congenital insensitivity to pain. This work aims to explore the role of *CMAS* in pain pathways and the mechanism linking *CMAS* …
-
On the Colour Tuning and Stability of Carbene-Metal-Amide Organic Light-Emitting Diodes
… One such possibility are carbene-metal-amides (CMAs). CMAs are a family of charge transfer type photoemitters which luminescence through a thermally activated delayed fluorescence mechanism. CMAs have been previously incorporated into highly efficient green OLEDs. In chapter 4, CMAs are first …
-
Synchrotron X-Ray Diffraction and Piezospectroscopy used for the Investigation of Individual Mechanical Effects from Environmental Contaminants and Oxide Layer Undulations in Thermal Barrier Coatings
… comprised of Calcium-Magnesium-Alumina-Silicate (CMAS). Previous studies have shown that these effects present themselves through variations in the thermomechanical and thermochemical properties of the coating. This study investigated the impact of CMAS ingression on the Yttria Stabilized Zirconia …
-
New bio-analytical separations utilizing chiral mobile phase additives in thin layer chromatography and chiral stationary phases in high performance liquid chromatography
… phases (CSPs) and chiral mobile phase additives (CMAs). Native and derivatized ß-cyclodextrins (ß-CD) were used as chiral stationary phases in reverse phase and normal phase HPLC, respectively. This study marked the first use of derivatized ß-CDs for chiral separations in normal phase media. …
-
Estilo de gestão na elaboração de política de assistência social : a visão do conselho municipal de assistência social de Porto Alegre (RS)
Esta pesquisa avalia o estilo de gestão do CMAS/POA na elaboração da política de assistência social do município, na visão dos seus próprios integrantes (conselheiros). Baseiase no modelo de análise de estilo de gestão estruturado por Rensis Likert, aplicado às condições e contexto de um conselho …
-
A multi-case investigation into the effectiveness of shop floor improvement teams at South African manufacturers
… of contemporary approaches to manufacturing (CMAs), such as total quality management, just-in-time, and lean production, and the empirical research evidence which indicates that few of these programmes result in demonstrable operational performance improvement
-
A Case Study of Complex Metallic Alloy Phases: Structure and Disorder Phenomena of Mg-Pd Compounds
… of them being complex metallic alloy phases (CMAs), i.e., characterized by (i) giant unit cells with more than hundred atoms, (ii) inherent disorder, (iii) the presence of a cluster substructure. Phase fields and heterogeneous equilibria of the intermediate phases β- Mg6Pd, γ-Mg57Pd13, …
-
Triplet Exciton Management via Solid-State Interactions in Organic Semiconductors
… light emitters, carbene-metal-amides (CMAs). Triplet excitons are normally silent in luminescence due to the spin-forbidden decay process, whereas effectively harvesting triplet excitons helps to boost the performance of light-emitting devices. As the triplet excitons are sensitive to …
-
Predictive Disintegration Process Modelling of Immediate Release Tablets Using Terahertz Technology
… process, linking Critical Material Attributes (CMAs) and Critical Process Parameters (CPPs) to Critical Quality Attributes (CQAs) like disintegration performance is essential, particularly during scale-up. Predicting disintegration for immediate-release tablets remains challenging due to the …
-
Decentralisation of water resource management : a comparative review of catchment management authorities in South Africa and Victoria, Australia
… NWA introduces Catchment Management Agencies (CMAs) in water management and gives them authority over water management at a catchment level. Initially there were nineteen (19) and this number has since been reduced to nine (9) due to a number of factors. South African authorities are now …
-
Kinetics of DCOD Consumption by Bacterial Suspensions
… biomass from a complete mixed activated sludge (CMAS) system was tested using sequencing batch reactors (SBR). Results indicate that when the So/Xo ratio is low (below 0.3) the removal of readily biodegradable soluble substrate can be well described by first-order kinetics with an asymptotic …
-
Simulation and optimization of a package sewage treatment plant
… overtop of a complete-mix activated sludge (CMAS) tank; the unit also has a primary sludge holding tank and a secondary clarifier. From consideration of reaction kinetics, reactor type, and geometry, a mechanistic model was developed to explain the phenomena of substrate removal in the …
-
Science as a Second Language: Analysis of Emergent Bilingual Performance and the Impact of English Language Proficiency and First Language Characteristics on the Colorado Measures of Academic Success for Science
… are predictive of EBs' achievement on the CMAS for science, overall and by strand. It is the blending of the social (listening and speaking) with the academic (reading and writing) that is also important and possibly more important.</p>
-
Photophysics of small molecule organo-metallic complexes for OLED applications
… class of small molecules, Carbene Metal Amides (CMAs) which display efficient emission, and have been used in OLEDs, breaking the efficiency records for both solution processed devices (27.5%), and evaporated host free emissive layers (23%). Herein I present my work using a variety of time …
-
Evaluation of a Particle Sampling Probe to Measure Mass Concentration in Particle-Laden Flows
… and buildup of Calcia-Magnesia-Alumina-Silicate (CMAS) deposits. Analyzing the particle mass concentration of the airflow can help better understand this issue. This can best be accomplished by sampling particles with a sampling probe at various locations within an engine. The present study is a …
Page 1 of 2