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 4387 for “"Spectra"”.
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Spectra of Hypergraphs
<p>We present a spectral theory of uniform hypergraphs that closely parallels Spectral Graph Theory. A number of developments building upon classical work has led to a rich understanding of 'symmetric hyperdeterminants' of hypermatrices, a.k.a. multidimensional arrays. Symmetric hyperdeterminants …
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Noncommutative ring spectra
Let A be an Ax ring spectrum. We give an explicit construction of topological Hochschild homology and cohomology of A using the Stasheff associahedra and another family of polyhedra called cyclohedra. Using this construction we can then study how THH(A) varies over the moduli space of AO structures …
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Aperiodic Order and Singular Spectra
… such systems. In the second part, we investigate spectral properties of Schrödinger operators that are associated with non-primitive substitution systems and dynamically defined product systems. Finally we perform a multifractal analysis of a particular spectral measure that has become known as …
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An Exploration of Theoretical Spectra
… thesis presents an exploration of theoretical spectra, both in their creation andinterpretation, with a focus on coupled cluster methods and an emphasis on the importance of relativistic effects. Throughout this work the X2C Hamiltonian is utilized to produce the reference wavefunction, …
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Multidimensional Spectra from Classical trajectories
… great alternatives to approximate quantum spectra. Optimized mean trajectory (OMT) approximation is one of such semiclassical approximations that was originally developed for the calculation of two dimensional infrared (2DIR) spectroscopy. Nonlinear response functions are the central theme …
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Units of Equivariant Ring Spectra
We then define the units of equivariant spectra in terms of equivariant Gamma-spaces. Thus showing that units of equivariant spectra are equivariant spectra.
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L-functions and J-spectra
… this group cohomology is on the E_2-page of a spectral sequence to compute homotopy groups of the K(1)-local sphere, which is the p-completion of the J-spectra. This gives a new explanation of the connection between congruences of E_2k and the image of the stable J-homomorphism in the stable …
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Multiplicative Structures on Moore spectra
… for every 𝒉 and 𝑛 there exist generalized Moore spectra of type 𝒉 which admit an Eₙ-algebra structure.
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Models of plankton biomass spectra
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1999.
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Infrared spectra of adsorbed molecules
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1960.
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SEMICLASSICAL VIBRATIONAL SPECTROSCOPY BEYOND POWER SPECTRA
… interactions. However, the increasing spectral complexity of medium- and large-sized systems makes theoretical support essential for reliable spectral assignment. Semiclassical (SC) molecular dynamics offers an effective compromise between accuracy and computational cost, incorporating …
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Continuous Spectra For Substitution-Based Sequences
… thesis is chiefly concerned with the continuous spectra of substitution-based sequences. First, motivated by a question of Lafrance, Yee and Rampersad [34], we establish a connection between the ‘root-N’ property and the corresponding sequences that satisfy it having absolutely continuous …
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The Vibrational Spectra of Chlorosubstituted Hydrocarbons
Infrared spectra of saturated and unsaturated chlorinated hydrocarbons have been studied using low temperature techniques, including isolation in an inert matrix. The compounds were selected in relation to problems in the understanding of the properties of poly (vinyl chloride).<br/><br/>The …
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Sparse Modeling of Grouped Line Spectra
… parametric models for estimation of line spectra, when the spectral content of a signal source is assumed to exhibit some form of grouping. Different from previous parametric approaches, which generally require explicit knowledge of the model orders, this thesis exploits sparse modeling, …
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