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 452 for “"Size and Shape"”.
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A size and shape analysis in obstructive sleep apnea patients
… makes it difficult to obtain an adequate sample size. Further, the size of the upper airway structure often overwhelms the data matrix, and thus may be a source of multicollinearity or noise. More seriously, the strong size effect may hide an underlying biological factor. Landmark data and their …
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The Relationship of Instruments’ Size and Shape to Handwriting Achievement
This experiment is concerned with the design of handwriting instruments. It is the purpose of this experiment to determine if the Zaner-Bloser finger-fitting instruments have any advantages as to speed and quality of handwriting over the conventional instruments as regularly used at sixth grade …
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Phenotypic patterns of size and shape in North American killifish
… levels of organization, including between and within species, populations, and individuals. Fish are ideal organisms to explore questions related to the patterns of variation and the potential processes driving patterns. Fish occupy different types of habitats that vary in several important …
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Automatic selection of optimal window size and shape for texture analysis
This thesis is a theoretical and empirical examination of the relationship between texture and scale, and its effects on image classification. This study involved creating a model that automatically selected windows of optimal size according to the location of a pixel within a land cover region and …
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The influence of transplanting depth of head lettuce on size and shape of head
… the influence of depth of transplanting on the size and shape of head of crisp-head lettuce. A hotbed experiment was conducted in the winter of 1950-1951. A greenhouse experiment was conducted in the spring and early summer of 1951. A final experiment, which was a modification of the other two, …
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Linking transcript, QTL and association mapping to understand the genetic control of leaf size and shape in Populus
Leaf size in Populus is an adaptive trait and early indicator of biomass yield. In order to investigate the genetic variance contributing to this variation in leaf size a collection of Populus nigra L. were made from across Europe and were planted at a single site in Belgium, in a fully randomized …
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Effects of size and shape of specimens and gas slippage phenomena in the measurement of coal permeability to gas flow
… by 25 to 150 per cent. The geometrical shape of the specimen has no effect on the permeability value. Comparisons were made for cylindrical specimens of one inch, two inch, and four inch diameters versus the corresponding dimensions of the cube specimens. It has been found that the …
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Investigating the functional and adaptive significance of leaf size and shape variation in Jamesbrittenia (Scrophulariaceae (s.s). tribe Manulae) : an experimental and comparative approach
… This study aimed, using a combined experimental and comparative approach, to investigate the functional significance of leaf size and shape variation, as well as the patterns of leaf form variation in the genus Jamesbrittenia within the context of phylogenetic history. Leaf sizes 63-measured …
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An initial evaluation of the relationship between human pelvic size and shape and the distribution, type and severity of vertebral degenerative disease in archaeological material
Keyývords bipedal adaptation;pelvic shape; pelvic dimensions;vertebral degenerative disease. In order to adopt an efficient bipedal postureand method of locomotion, tile human skeleton has evolved a curved vertebral column and a stable, compact male pelvic girdle. Adaptive vertebral curves and the …
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The Development of a vision-based flotation froth analysis system
… on-line analysis of flotation froth images. The size and shape of bubbles that constitute the flotation froth convey considerable information on the performance of the flotation process. A method whereby this size and shape information can be automatically extracted from froth images is highly …
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The Development of a vision-based flotation froth analysis system
… on-line analysis of flotation froth images. The size and shape of bubbles that constitute the flotation froth convey considerable information on the performance of the flotation process. A method whereby this size and shape information can be automatically extracted from froth images is highly …
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The investigation of the characterisation of flotation froths and design of a machine vision system for monitoring the operation of a flotation cell ore concentration
… available that has the ability to measure the size and shape of the bubbles that constitute the surface froth. For this reason, research into a vision based system for surface froth characterisation has been undertaken. Being able to measure bubble size and shape would have far reaching …
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Kinetically Controlled Synthesis of Triblock Copolymer Stabilized Gold Nanoparticles
Concerns for the environmental and economic impact of organic solvents in gold nanoparticle synthesis have motivated the search for more environmentally benign alternatives. One viable approach is the synthesis of AuNPs from tetrachloroauric(III) acid (HAuCl4) using triblock copolymers (TBPs). …
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Combined wet milling crystallisation methods for particle engineering
… processes which is a critical separation and purification technique. Mechanical milling is employed post crystallisation as an offline unit operation usually in a separate dry solids processing facility for adjusting the particle size and shape attributes of crystalline products for …
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Exploration of a template-directed approach for the synthesis of silver nanoparticles
… the preparation of a series of sugar triazole ligands to template the formation of monodisperse AgNPs in a size- and shape-controlled manner. Chapter 1 introduces the optical properties of metal nanoparticles and the common methods for the preparation of AgNPs, highlighting the limitations of …
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Análise experimental do efeito do ângulo de injeção de gás em um escoamento vertical ascendente de líquido
… vertical liquid flow, regarding the bubble size and shape distributions, as well as liquid velocity profile, both in the injection area. The experiments are carried in a 44 mm acrylic vertical pipe, in which water flows and air is injected through an angled device, in relation to the main …
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Melamine phosphate as a component of intumescent coatings
… exhibit variations in its chemical constitution, and crystal shape and size, dependent upon the method of production. These crystal types have been incorporated with epoxy resin to produce intumescent coatings, which have been tested on a small scale fire testing device, designed and calibrated …
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Implications of Shape Factors on Fate, Uptake, and Nanotoxicity of Gold Nanomaterials
Noble metal nanoparticles such as gold and silver are of interest because of the unique electro-optical properties (e.g., localized surface plasmon resonance [LSPR]) that originate from the collective behavior of their surface electrons. These nanoparticles are commonly developed and used for …
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Enhanced structural characterisation of supported catalysts
… are emerging for use in heterogeneous catalysis and electrocatalysis with order on the atomic scale. One of the central issues for continued growth in this area is the ability to precisely control the size and shape of the nanoparticles, especially for sub 10 nm particles. Understanding the …
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