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 22 for “"M-Type"”.
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Ab initio study of magnetic anisotropy of M-type hexaferrite thin films
… oftechnologically important applications. The M-type hexaferrites, ofwhich BaFe12O19 is taken as a prototype compound, show particular promise as very high density magnetic and magneto-optical datastorage media. There are still serious gaps in the understanding ofthe fundamental origins of, and …
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Cordierite and its retrograde breakdown products as monitors of fluid-rock interaction during retrograde path metamorphism : case studies in the Schwarzwald and the Bayerische Wald (Variscan belt, Germany)
… textural position and grain size four pinite types (border, mat, fissure, isotropic type) were distinguished that formed by distinct allochemical processes under different pressure-temperature conditions at different times. They probably represent general features of cordierite breakdown. …
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Machine Learning techniques to discover and understand the population of flare stars in MeerLICHT data
… simulated data, we also show that grouping all types of supernovae into one aggregate class and discarding distance information improves the performance of both models to 96.5% and 96.0% for random forest and neural networks respectively. As additional work, we attempt to find sub-classes within …
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Evolution of gender associated mitochondrial DNA in bivalves
… Although the matrilineally inherited mtDNA (or F type) is present in the somatic tissues of both sexes and the female gonad, the patrilineally inherited mtDNA (or M type) is limited to the male gonad. In Mytilus several observations have been made concerning the evolution of DUI. Firstly, the …
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New perspectives of pure and lanthanum modified lead zirconate titanate crystalline solutions
Two types of oxygen octahedral rotational systems (R- and M-type) were found in the rhombohedral phase field of lead zirconate titanate (PZT). A hierarchy of domain structure was observed in the high temperature rhombohedral ferroelectric (FE) state, where local octahedral tilt domains on the scale …
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The Formation and Evolution of Habitable Worlds
… may preferentially absorb blue photons around F type stars, red photons around G, K, and early M type stars, and infrared photons around late M type stars. Then in Chapter 7 we show that around the latest M type stars, the lack of high-energy photons available for photosynthesis may limit total …
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Mathematical Methods for the Approximation of Radar Traces
… the IRLS algorithm proposed by Huber to solve M-type estimates for non-linear approximation problems. Furthermore we derive a blueprint for a method to solve separable, quadratic least squares problems with very few quadratic variables.
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Magneto-elastic behavior in hard- and soft-MRE's including demagnetizing effects
… 30% by volume of either nominally 40-micron M-type barium hexaferrite (BaM) or 325-mesh iron (Fe) particles cured with or without the presence of a magnetic field. Magnetization and density measurements were employed to help confirm fabrication of the four distinct classes. Results of …
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Rotational lightcurve analysis of binary Asteroid (22) Kalliope/Linus
… error bars on the mass and density of this M-type asteroid. Since the bulk composition is known from spectral data, the porosity of the asteroid can be calculated. Knowing the porosity of the asteroid can give scientists a better understanding of its formation and dynamical evolution. Binary …
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The prevalence of Group A Beta-Hemolytic Streptococci carriage in children in Africa: a systematic review
… Currently, data on GAS carriage prevalence and M-type distribution in African countries are largely scant. We therefore undertook to perform a systematic review to determine the prevalence and type distribution of asymptomatic streptococcus carriage in children aged 5 -15years, residing in African …
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Development of a test method to measure "in-use" emissions from stationary and portable diesel sources
… like an Inspection and Maintenance (I/M) type test method was developed. Only concentration measurements of pollutants such as oxides of nitrogen (NO x) and carbon dioxide (CO2) are required to determine compliance using this "compliance factor, F" approach. Hence, errors introduced due to …
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Assessing changes in pollen assemblage and charcoal accumulation during known changes in climate from c. 5,400 to 3,300 Years Before Present at the forest-prairie ecotone in Alberta, Canada
… rates for both total charcoal and morphotypes, as well as the percent relative abundance of charcoal morphotypes, were used to infer changes in landscape fire regimes during these aridity cycles. One-way ANOVAs were used to determine significant differences in average accumulation rates …
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The genesis of ‘giant’ copper-zinc-gold-silver volcanogenic massive sulphide deposits at Tambogrande, Perú : age, tectonic setting, paleomorphology, lithogeochemistry, and radiogenic isotopes
… basin. Phase 1 rhyolite is tholeiitic, M-type, and considered to have formed from relatively high temperature, small batch magmas. The high heat flow and extensional setting extant during the initial stages of arc development were essential components for forming a VMS hydrothermal system. …
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Characterization of antimicrobial resistance among canine urinary isolates in Western Canada
… Overall, twelve isolates harbored CMY-2 type AmpC -lactamases, and seven produced CTX-M type extended spectrum -lactamases (ESBLs). Of the fosfomycin resistant E. coli, one also possessed an CMY-2 type AmpC -lactamase. Of the fosfomycin resistant S. pseudintermedius, three were …
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The M(1) muscarinic receptor and its second messenger coupling in human neuroblastoma cells and transfected murine fibroblast cells
… The mAChRs in these cells are of the M₁ type defined by their high affinity for PZ and low affinity for AF-DX 116 and coupled to hydrolysis of inositol lipids, possibly via a pertussis toxin sensitive G protein. The relationship between the M₁ mAChR density and the receptor-mediated …
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Understand thy star, understand thy planet
… number of relatively inactive stars, from F-type to M-type stars, over long timescales, with the aim of improving our detection of long-period exoplanets. I analyse the long-term changes seen for multiple activity indicators and study their correlation with the RVs. The sign of the …
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Spectroscopic surface brightness fluctuations
… stellar spectra I show for the first time that M-type giants cause the fluctuations. Stellar evolution models suggest that also carbon rich thermally pulsating asymptotic giant branch stars should leave a detectable signal in the SBF spectrum. I cannot detect a significant contribution from these …
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Multiple levels of regulation are associated with the production of CTX-M-14 and CTX-M-15 beta-lactamases in Escherichia coli
… Enterobacteriaceae is increasing rapidly. CTX-M type β-lactamases are the most prominent ESBL family worldwide and are produced mainly by E. coli. blaCTX-M-14 and blaCTX-M-15 genes are the dominant alleles circulating worldwide. The massive spread of CTX-M-producing organisms in both clinical and …
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MODULATION OF TASTE PERCEPTION AS A POSSIBLE STRATEGY IN OBESITY TREATMENT: NEW PERSPECTIVES FOR PRECISION NUTRITION
… factors such as eating disorders and chronotype. In addition, we wanted to investigate the impact of different dietary treatments such as the Mediterranean diet and the very low calorie ketogenic diet (VLCKD) on gustatory perception of subjects with severe obesity with the goal of being able …
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Multiple Asteroid Retrieval Mission
In this thesis, the possibility of enabling space-mining for the upcoming decade is explored. Making use of recently-proven reusable rockets, we envision a fleet of spacecraft capable of reaching Near-Earth asteroids. To analyze this idea, the goal of this problem is to maximize the asteroid mass …
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