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 161 for “"Birefringence"”.
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Electric birefringence studies of biopolymer systems
Important and novel electric birefringence measurements of immediate significance in the biomedical field are reported on a family of materials which form the major constituents of the cartilage connective tissue. Outstanding amongst the reported results is the confirmation of the Hardingham-Muir …
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Transient electric birefringence of macromolecular systems
The transient electric birefringence method, i. e. the transient Kerr effect, has been employed to study the optical, electrical and geometrical properties of three macromolecular systems. An apparatus is described in which the birefringence could be measured when d. c. electric field pulses (of …
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High Birefringence And Low Viscosity Liquid Crystals
… anisotropic LCs, we have developed some high birefringence isothiocyanato tolane LC compounds with birefringence ~0.4, and super high birefringence isothiocyanato biphenyl-bistolane LC compounds with birefringence as high as ~0.7. Moreover, we have studied the photostability of several high …
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Anisotropy, Birefringence, and Dispersion in Artificial Dielectrics
Made available in DSpace on 2014-12-12T20:54:43Z (GMT). No. of bitstreams: 1 7804126.pdf: 6423124 bytes, checksum: 1e680364d4ca7155bc61597a574bdf7d (MD5) Previous issue date: 1977
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Photo-induced birefringence in single-mode optical fiber
… wide bandwidth, small size, and light weight. Birefringence is an important parameter of the optical fiber, determining bandwidth in fiber optic telecommunications, and resolution in fiber optic sensors. This thesis describes and demonstrates permanent photo-induced rotation of the principal …
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Viscoelastic Fluid Flow Past a Submerged Spheroidal Body (Birefringence, Free Energy)
A stable and time-efficient numerical algorithm has been developed to study the problem of homogeneous axisymmetric flow of a third order fluid past a spheriodal body. The numerical solution was shown to agree well with existing analytical solutions for several limiting cases (such as flow past a …
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Electrooptic Birefringence Investigations of Adsorbed Water Properties Indilute Aqueous Bentonite Suspensions
Made available in DSpace on 2014-12-12T00:17:49Z (GMT). No. of bitstreams: 1 7219801.pdf: 2347967 bytes, checksum: 2eea569f85b3766a83bad11ec9d8ea8f (MD5) Previous issue date: 1972
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A Photo-Electric Method for Detecting Acoustically Induced Birefringence in Liquids
Made available in DSpace on 2014-12-10T19:06:50Z (GMT). No. of bitstreams: 1 7212078.pdf: 4647154 bytes, checksum: f7c5a413ffc38e4633ba37a051d3821b (MD5) Previous issue date: 1971
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An experimental study of the magnetic linear birefringence and dichroism of liquids, solutions and dispersions
… contains an experimental study of the linear birefringence and dichroism induced by magnetic fields In molecular liquids, solutions and colloidal dispersions. The measurements were made using apparatus of greater sensitivity than any previously described; most results were new determinations. …
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Light Scattering and Electric Birefringence Studies of Gases and Liquids and Magnetic Studies of Aromaticity
Made available in DSpace on 2014-12-13T20:10:10Z (GMT). No. of bitstreams: 1 7803949.pdf: 3403968 bytes, checksum: a19247c5e3caeda3ed5c629c82742ae7 (MD5) Previous issue date: 1977
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Behavior of Polymer Solutions and Melts in Shearing and Elongational Flow Using Streak Photography and Birefringence
An experimental analysis has been carried out for the kinematics of a Newtonian (glycerin solution) and a non-Newtonian (polyacrylamide solution) fluid undergoing flow past a radially oriented cylinder in both a converging and uniform flow field. The glycerin and polyacrylamide solutions are found …
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Electrooptic Birefringence Investigations of Particle Dipole Orientation and Associated Water Properties in Dilute Aqueous Clay Suspensions
Made available in DSpace on 2014-12-12T00:17:59Z (GMT). No. of bitstreams: 1 7412175.pdf: 1776832 bytes, checksum: 9b7d99e71076cc5dbda7119fbac0205c (MD5) Previous issue date: 1973
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Interpretation of shear wave birefringence in P to S converted waves data using the propagator matrix method
… original method for estimating local shear wave birefringence properties for 3D surface P to S converted waves. To accomplish this we approach the problem using reverse VSP (RVSP). The method works in the pre-stack domain and uses the P waves converted to S as shear wave sources. We solve the …
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Spatially resolved measurements of kinematics and flow-induced birefringence in worm-like micellar solutions undergoing high rate deformations
… to measure the flow kinematics and a commercial birefringence microscopy instrument (ABRIOTM System, CRi., Inc.) was adapted for making full-field measurements of flow-induced birefringence (FIB) in order to obtain high-resolution measurements of the evolution of the average stress and molecular …
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Application of infrared birefringence imaging for measuring residual stress in multicrystalline, quasi-mono, dendritic web, and string ribbon silicon for solar cells
… for solar cells. The combination of an infrared birefringence imaging technique along with a sectioning method is proposed as an approach to spatially resolve and decouple the in-plane residual stress components on four wafers originating from different growth methods. The suitability of this …
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Optical properties of nanostructured silicon-rich silicon dioxide
… films are optically anisotropic with a positive birefringence (nTM > nTE) that increases with increasing silicon content for as-deposited films. The dependence of the birefringence on annealing temperature is also influenced by the silicon content. After annealing, samples with high silicon …
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Experimental and theoretical analysis of polarization-maintaining fibre for sensing applications
… for a range of industrial applications. High-birefringence (Hi-Bi) optical fibres represent an important type of specialist fibres that have been explored widely by researchers. The focus of this thesis is to explore their potential for different sensing applications as the birefringence of …
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Finite element modelling of photonic crystal fibres
… highly birefringent PCF. The variation of modal birefringence is shown through the effect of hole diameters, air hole arrangement, structural asymmetry, operating wavelength, and pitch-distance. Birefringence was enhanced by breaking the structural symmetry and this was verified by using unequal …
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Polarimetric Temperature Sensor Using Core-replaced Fiber
… The D-fiber has an elliptical core and exhibits birefringence. This birefringence can be used to create a polarimetric sensor. The elliptical core supports two orthogonal modes that have separate effective indices of refraction. The indices of refraction change with a change in temperature. Since …
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An experimental and numerical analysis of the exit flow in a slit die for polymer melts
A slit die has been constructed to use both flow birefringence and direct pressure measurements to study the extrapolated exit pressure (Px) and the exit pressure theory used to evaluate the magnitude of the primary normal stress difference (N1) from the value of the exit pressure. Flow …
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