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 1963 for “"signatures"”.
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Functional signatures
… thesis, we introduce the notion of functional signatures. In a functional signature scheme, in addition to a master signing key that can be used to sign any message, there are signing keys for a function f, which allow one to sign any message in the range of f. An immediate application of …
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Deniable Ring Signatures
Ring Signatures were developed by Rivest, Shamir and Tauman, in a paper titled How to Leak a Secret, as a cryptographically secure way to authenticate messages with respect to ad-hoc groups while still maintaining the signer's anonymity. While their initial scheme assumed the existence of random …
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Spectroscopic signatures of isomnerization
This thesis explores spectroscopic signatures of isomerization, especially new patterns that emerge and report on chemically relevant portions of the potential energy surface, such as the transition state. The most important new pattern discovered is the "isomerization dip", a sharp decrease in the …
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Graph-based genomic signatures
… of conserved or divergent gene order. Genomic signatures work by capturing one or more such features efficiently into a compact mathematical structure. This work examines the unique manner in which oligonucleotides fit together to comprise a genome, within a graph-theoretic setting. A de Bruijn …
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SEISMIC SIGNATURES OF PORE CONNECTIVITY
… medium parameters’ influence on seismic signatures, especially pore connectivity. Firstly, I use the Zoeppritz equation to analyze reflection coefficient's sensitivity to eight medium parameters; results show they all have significantly different sensitivity. Friability is an empirical …
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Cosmological signatures of fundamental physics
… thesis deals with the study of the cosmological signatures of certain aspects of fundamental physics, and how cosmological observables can be used to constrain properties of fundamental particles. Over the past decades, increasingly precise measurements in cosmology have become powerful probes of …
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Multimessenger signatures of compact binaries
Gravitational waves and electromagnetic observations provide complementary views into some of the most extreme objects in the Universe. In this thesis, I present studies of multimessenger compact binaries from two angles: electromagnetic follow-up of gravitational-waves, and gravitational-wave …
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Spatiotemporal Signatures of Elastoinertial Turbulence
… and lead to a change in the spatiotemporal signatures of elastoinertial turbulence. Our findings lay out a pathway for identifying the most promising biopolymers to serve as biodegradable drag reducing agents for marine vehicles operating in high salinity environments enabling savings in the …
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First Order Signatures and Knot Concordance
Invariants of knots coming from twisted signatures have played a central role in the study of knot concordance. Unfortunately, except in the simplest of cases, these signature invariants have proven exceedingly difficult to compute. As a consequence, many knots which presumably can be detected by …
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MOMENTUM SIGNATURES OF THE ANDERSON TRANSITION
This thesis explores for possible signatures of Anderson localization and the Anderson metal-insulator transition (MIT) in momentum space. We find that an initial plane-wave propagating in a disordered medium exhibits a diffusive background and two interference peaks, the coherent backscattering …
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Early neural signatures of cognitive development
Studying infant cognition is an exciting yet challenging task due to the complexities of assessment in this developing population. Non-verbal behaviors, particularly looking behaviors, have served as important tools in enriching our understanding of infants’ minds. However, interpreting looking …
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Robust portfolio construction using sorting signatures
Mean-variance analysis introduced by Harry Markowitz has been criticised in the past mainly due to the counter-intuitive and unstable nature of the resultant portfolios from the optimisation. These disappointing results have been linked to the presence of estimation error in the estimates of the …
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Digital signatures from probabilistically checkable proofs
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mathematics, 1995.
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Cosmological signatures in galaxy cluster structures
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1997.
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Electronic signatures of large amplitude motions
… coordinates and their associated electronic signatures are constructed for two prototypical unimolecular isomerizations: acetylene<-->vinylidene (HCCH<-->CCH2), and hydrogen cyanide$hydrogen isocyanide (HCN<-->HNC). The nuclear quadrupole hyperne structures of HCN and HNC are distinct at …
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Uranium Enrichment Signatures of Fluorinated Epoxy
Accounting for the production of fissile material is an important component of enforcing the international non-proliferation regime. However, while there are well defined forensic techniques for estimating and verifying the production of plutonium, there are currently no such techniques for the …
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