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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 40 for “"Empirical formula"”.
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A comparison of field methods of measurement of the water table drawdown characteristics between lateral tile drains in Brookston clay loam soil and an evaluation of an empirical formula for placing lateral drains
Thesis (M.S.)--Michigan State College of Agriculture and Applied Science. Dept. of Agricultural Engineering, 1953
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Effect of liner thickness on acoustic wave propagation in ducts
… for the liner acoustic admittance and a semi-empirical formula that is widely used in the literature is discussed. The influence of the liner on acoustic propagation in a duct is examined for the case of a plane duct that carries a uniform mean flow. Numerical results for the attenuation rates …
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Total electron scattering cross sections of tetrafluoromethane, trifluoromethane, hexafluoroethane, and octafluorocyclobutane in the energy range 0.10 to 4.50 keV.
… sections available in the literature. A simple empirical formula is also developed by using the present measurements to predict the cross sections of linear fluorocarbons as a function of the electron energy and the number of atoms in the target molecule. This empirical formula is used to …
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Optical Characterization of Defects and Impurities in Gallium Nitride
… K, and the results were fitted to Varshni's empirical formula to obtain an expression for the dependence of the energy gap of GaN on temperature which should be generally applicable to most high-quality, unstrained GaN material.
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Methodology to determine post yield material mechanical properties from spherical indentation
… A detailed methodology based on Tabor's empirical formula and Meyer's law is developed to determine the material strain hardening properties, Young's modulus and yield strength. It is noticed that Tabor's empirical formula is valid in the plastic region (deep indentation) with a small …
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Aspects of energy requirements for rock drilling
… indices by energy concepts and the developed empirical formula. Field rotary-percussive drilling studies and collection of drill cuttings on the basis of laboratory analysis.
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Preparation of Phenylsulphur Chloride Tetrafluoride
… an amber solid believed to be a polymer with the empirical formula C6H3.67SF2. Chlorination of a C6H5SF3-CSF mixture in monel at 220°C yielded a yellow liquid tentatively identified as a mixture of the new species C6H5SF4C1, FC6H4SF4C1 and C1C6H4SF4C1.
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Organoosmium(IV) Hydroxo Complexes and the Synthesis of Heterobimetallic Catalysts for Aerobic Alcohol Oxidation
… (dbm =C6H5C(O)CHC(O)C 6H5) and a complex of the empirical formula C13H 11Cl3NO2V. The square pyramidal complex V(O)Cl 2(dbm) is a black solid that is stable in solution, but reacts with trace water. The complex C13H11Cl3NO 2V is unstable in solution. In a solution of ether/hexane, V(O)Cl 2(dbm) …
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A Method to Compute Three Dimensional Magnetospheric Equilibria with Dipole Tilt and its Application in Estimating Magnetic Flux Tube Volume
… in an attempt to generalize the Wolf [2006] empirical formula, and describe a method for estimating flux tube volume from measurements at geosynchronous orbit. This new method has been tested against various equilibrated magnetospheres generated by the new friction code. Although still …
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Transient and Spectral Fatigue Analysis for Random Base Excitation
… the spectral method. In this study, the Dirlik’s empirical formula has been selected for the spectral method, partly because it has proven to be a good implementation in structural mechanics fatigue. In order to account multiaxial fatigue in the calculations, the authors decided to use Dang Van …
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Intelligent Memory Management Heuristics
… in the previous iterations, the proposed empirical formula predicts with reasonable accuracy the density of live nodes on the heap, to decide between garbage collection and heap expansion. The resulting heuristics are tested empirically and shown to improve overall execution performance …
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A study of storm losses using a laboratory catchment under computer-controlled simulated rainfall
… of a soil's infiltration capacity enabled an empirical formula to be established which enables a soil's infiltration capacity to be determined at a time after rainfall has ceased.
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Increased confidence of metabolite identification in high-resolution mass spectra using prior biological and chemical knowledge-based approaches
… pipeline increased the number of single true empirical formula assignments compared to using accurate mass alone. To conclude, analytical and bioinformatics methods developed in this thesis have successfully facilitated the putative identification of hundreds of metabolites in several …
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Impact of x-ray dose on the response of CR-39 nuclear track detector to 1-5.5 MeV alphas and 0.5-9.1 MeV protons for spectroscopy at the OMEGA Laser Facility and the National Ignition Facility
… particle energy, was characterized by an empirical formula.
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Asymptotic analysis of mass-dominated convection in a nanofluid
… is investigated using the particulate medium formulation. We consider a dilute liquid suspension of solid spherical particles that is confined between two horizontal plates of infinite extent placed at the vertical coordinates Z=0 and at Z=H. The plates are assumed to be rigid, perfectly …
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The effect of mass transport on deposit quality in copper electrowinning
… smoothing additives had little effect. An empirical formula to predict cupric diffusivity was generated for later use in mass transport modeling.</p> <p>Boundary layer thickness information for commercial cells was taken from the literature. The rotating cylinder Hull cell (RCHC) was then …
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The effect of fictional and thermal forces upon sea bed pipeline buckling behaviour.
… deduced upon the basis of model tests. A semi-empirical formula has thereby been produced for use in design practice. Further, a novel interpretation of sea bed recovery, or the pipeline's submerged self-weight inertial characteristics associated with vertical buckling, has also been …
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Applications modelling of advanced multilayer semiconductor structures - The bulk unipolar devices
… and various device design parameters using an empirical formula, is presented for Computer-Aided-Design (CAD). The model has been shown to simulate all the critical points on the I/V characteristic and the reconstruction is in good agreement with published results. The p-plane BUD structure is …
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Metrology of very thin silicon epitaxial films
… 0. 75 - 2. 75 e V is fitted to a self-consistent empirical formula with only five fitting parameters. Accurate ellipsometry measurement of thickness and composition is successfully demonstrated using this formula. This thesis has developed a non-destructive technique for the measurement of both …
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