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 245 for “"forbidden"”.
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Forbidden Waters
Since 1950 Yellowstone National Park has stood as the largest river system with a complete ban on boating in the world. Despite the prohibition, generations of kayakers have been unable to resist the world-class whitewater of the Black Canyon of the Yellowstone River, and today advocates on both …
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Forbidden Waters
Since 1950 Yellowstone National Park has stood as the largest river system with a complete ban on boating in the world. Despite the prohibition, generations of kayakers have been unable to resist the world-class whitewater of the Black Canyon of the Yellowstone River, and today advocates on both …
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Haram Means Forbidden
The thesis titled ‘Haram Means It's Forbidden' primary deals with the intersectionality of the religion of Islam and Homosexuality within a South African setting. The main narrative that arises within the thesis is the notion of “Can one be homosexual and Muslim?” In Islam homosexuality is known as …
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Extremal problems involving forbidden subgraphs
… thesis, we study extremal problems involving forbidden subgraphs. We are interested in extremal problems over a family of graphs or over a family of hypergraphs. In Chapter 2, we consider improper coloring of graphs without short cycles. We find how sparse an improperly critical graph can be …
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The Forbidden Pattern Approach to Concatenation Hierarchies
… progress on this question using the so-called forbidden pattern approach: Classes of regular languages are characterized in terms of patterns in finite automata (subgraphs in the transition graph) that are not allowed. Such a characterization immediately implies the decidability of the …
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Bounds on extremal functions of forbidden patterns
Extremal functions of forbidden sequences and 0 - 1 matrices have applications to many problems in discrete geometry and enumerative combinatorics. We present a new computational method for deriving upper bounds on extremal functions of forbidden sequences. Then we use this method to prove tight …
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Forbidden-Patterns and Word Extensions for Concatenation Hierarchies
… Therefore, such characterizations are called forbidden-pattern characterizations. The main results of the thesis are as follows: forbidden-pattern characterization for level 3/2 of the DDH (this implies the decidability of this level) decidability of the Boolean hierarchy over level 1/2 of the …
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Permutations with forbidden subsequences, and, stack-sortable permutations
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mathematics, 1990.
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Extremal Problems On Families of Subsets With Forbidden Subposets
… we study the Lubell function of families with a forbidden poset(partially ordered set) for many posets and prove that these posets satisfy a conjecture of Griggs and Lu. On the other hand, we give the new proofs of the old results on this type of problems using the Lubell function method, which …
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Tournaments With Forbidden Substructures and the Erdos-Hajnal Conjecture
A celebrated Conjecture of Erdos and Hajnal states that for every undirected graph H there exists ɛ(H)>0 such that every undirected graph on n vertices that does not contain H as an induced subgraph contains a clique or a stable set of size at least n^{ɛ(H)}. In 2001 Alon, Pach and Solymosi proved …
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Women drummers, forbidden drums: Obiní Batá negotiates a taboo
Boston University. University Professors Program Senior theses.
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The Forbidden Female: Epistemophilia in the Domestic Gothic Tradition
Women in eighteenth-century Gothic novels are often portrayed by scholars as mildly rebellious in their characters and behaviors, but ultimately submissive to male characters until eventually returning to domestic circumstances similar to their origins. I join these scholarly conversations about …
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Forbidden substructures: induced subgraphs, Ramsey games, and sparse hypergraphs
… in extremal combinatorics with respect to forbidden induced subgraphs, forbidden colored subgraphs, and forbidden subgraphs. In Chapter 2, we determine exactly which graphs H have the property that almost every H-free graph has a vertex partition into k cliques and independent sets and …
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Forbidden Substructures in Graphs and Trigraphs, and Related Coloring Problems
Given a graph G, χ(G) denotes the chromatic number of G, and ω(G) denotes the clique number of G (i.e. the maximum number of pairwise adjacent vertices in G). A graph G is perfect provided that for every induced subgraph H of G, χ(H) = ω(H). This thesis addresses several problems from the theory of …
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Quantum Mechanical Study of Spin-Forbidden Reactions in Organometallic Catalysis and Astrochemistry
… a quantum mechanical investigation of spin-forbidden reactions in organometallic C-H bond activation and interstellar peptide-bond formation, as well as the derivation of the Morse empirical potential from an electrostatic model. In the first part, the role of triplet electronic state in …
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Forbidden Attraction: Russian Poets Read T. S. Eliot during the Cold War
<p>The goal of this study is to demonstrate how the reception of T. S. Eliot, one of the leading proponents of Anglo-American modernism, shaped the aesthetics of Russian poetry in the second half of the twentieth century. In the twentieth century, Russian culture found itself in a unique situation …
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Quantum Nuclear Dynamics: Application to Spin-Forbidden Transitions and Lifetime of Vibrational States
… method to study nonadiabatic dynamics of spin-forbidden reactions in which nonradiative transitions between the electronic states of different spin multiplicities occur due to the relativistic effect of spin-orbit coupling. In this molecular dynamics method based on the propagation of the …
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Forbidden Love: The Arabic Influence on the Courtly Love Poetry of Medieval Europe
… Spain during the Islamic caliphate. The theme of forbidden love graces the pages of many of the courtly love tales of chivalry that came out of medieval Europe. The Iberian Peninsula, the meeting point of France and Spain (the Pyrenees), harbored an exchange of culture in the twelfth century; this …
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