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 15 of 15 for “"d31"”.
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Effect of grazing intensity on the degree of use of range grasses in Flint Hills Bluestem pastures
Call number: LD2668 .T4 1952 D31
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Effect of grazing intensity on the degree of use of range grasses in Flint Hills Bluestem pastures
Call number: LD2668 .T4 1952 D31
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Characterization of Nanoporous Polyvinylidene Fluoride (PVDF) Sensors under Tensile Loading
… loading, and the piezoelectric coefficient d31 was characterized. The results showed that the d31¬ value increased from ~15.8 pC/N to ~51.3 pC/N as the porosity increased from 0% to 23.7%. With a further increase in porosity, the d31 value had a considerable declining trend. It is clear that …
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Uniform-electric-field-approximation based modelling of longitudinal piezoelectric transducers
… LPT can, in principle, be divided into d31-mode LPT and d33-mode LPT. Both types are investigated in this thesis work. The main contributions of this thesis work are presented in 6 chapters, with each based on an individual scientific paper. Paper 1 presents the rationale behind the …
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Solid-state NMR spectroscopy applied to model membranes: effects of polyunsaturated fatty acids
… of [2H31]-N-palmitoylsphingomyelin (PSM-d31) mixed with 1-palmitoyl-2-docosahexaenoylphosphatylcholine (PDPC) or 1-palmitoyl-2-oleoylphosphatidylcholine (POPC), as a monounsaturated control, and cholesterol (chol) (1:1:1 mol) in a model membrane was examined by solid state 2H NMR …
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Investigating the Role of the mRNA Capping Enzymes in Mouse Embryonic Stem Cells and Differentiation
… was explored by producing a Cmtr1<sup>∆S30-D31 </sup>cell line by CRISPR-Cas9, although it was not possible to obtain complete knockout clones, indicating that CMTR1 is essential for mESCs survival. Severe downregulation of CMTR1 resulted in a 40% decrease in first nucleotide ribose O-2 …
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Dynamic actuation properties of Ni-Mn-Ga ferromagnetic shape memory alloys
… is five times greater than Terfenol-D with d31 = 5.0 x 10-m / A. The magnetic susceptibility varies between 3-10, while the twinning stiffness varies between 30-40 MPa within the average bias stress range of 0.3 to 2.8 MPa. At optimum fields and bias stresses, the mechanical energy density …
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Investigation of Zinc Oxide Nanowires for Impedance Based Structural Health Monitoring
… model. Piezoelectric constants h31, g31, and d31 were estimated to be 9.138 E7 V/m, 6.092 E-4 Vm/N, and 2.46 E-14 respectively. To demonstrate the electromechanical coupling, ZnO nanowire composites were bonded to Al beams that were progressively damaged to determine if a change in electrical …
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Isolating and characterizing antimicrobial peptides derived from larvae of the blowfly Sarconesiopsis magellanica (diptera: Calliphoridae)
… activity against Gram-negative (Escherichia coli D31, Pseudomonas aeruginosa 27853) and Gram-positive (Staphylococcus aureus ATCC 29213, Micrococcus luteus A270) bacteria and sarconsesin II, having activity against Gram-negative (E. coli MG1655, P. aeruginosa ATCC 27853) and Gram-positive (S. …
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Single Crystal Based Ultrasound Actuated Needle For Regional Anaesthesia and Biopsy
… to immunity to the pressure. The design of the d31-mode needle actuation transducer eliminates prestress in the mass-spring configuration and its feasibility was verified by fabrication followed by characterization. Enhanced transducer performance was observed using single crystals, showing the …
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Enhanced biopsy and regional anaesthesia through ultrasound actuation of a standard needle
… power and actuator applications. Moreover, the d31-mode based planar cutting tool contrasts with the cumbersome design of mass-spring transducer structure and has the potential to be used in surgical procedures. <br/>
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Magnetoelectric Effect in Ferroelectric-Ferromagnetic Heterostructures
… these materials shared a linear relationship (d31 or d33) with the electric field, which is true only with small electric field signals. In contrast, the largest strain is produced during phase transformation in piezoelectric single crystals. In this work, we systematically investigated …
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A comparison of power harvesting techniques and related energy storage issues
… and macro fiber composite devices utilizing the d31 coefficient is performed in comparison to a monolithic piezoelectric bimorph. The information gathered here was used to design a two bimorph device termed the mobile energy harvester (MEH). Worn by a human being at the waste level, the MEH …
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Electromechanical response of textured ferroelectric PZT thin film stacks
… (001) to 100% (111). PZT stacks in the form of d31-type actuators were comprised of an elastic SiO2 layer, an adhesion layer of {100}-textured rutile TiO2, a metallization layer of highly {111}-textured Pt, a seed layer of PbTiO3, the PZT layer, a second Pt metallization layer, and, finally, a …
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Ruminal Degradation of Polyhydroxyalkanoate and Poly(butylene succinate-co-adipate)
… on blood samples collected on d0 and d30. On d31, animals were sacrificed to evaluate gross rumen measurements and pathology, determine papillae length, and characterize polymer residues present in rumen contents. Feed intake, body weight, body temperature, and general health were determined …