2 resultados para Procedures coordination
em CaltechTHESIS
Resumo:
This thesis is comprised of three chapters, each of which is concerned with properties of allocational mechanisms which include voting procedures as part of their operation. The theme of interaction between economic and political forces recurs in the three chapters, as described below.
Chapter One demonstrates existence of a non-controlling interest shareholders' equilibrium for a stylized one-period stock market economy with fewer securities than states of the world. The economy has two decision mechanisms: Owners vote to change firms' production plans across states, fixing shareholdings; and individuals trade shares and the current production / consumption good, fixing production plans. A shareholders' equilibrium is a production plan profile, and a shares / current good allocation stable for both mechanisms. In equilibrium, no (Kramer direction-restricted) plan revision is supported by a share-weighted majority, and there exists no Pareto superior reallocation.
Chapter Two addresses efficient management of stationary-site, fixed-budget, partisan voter registration drives. Sufficient conditions obtain for unique optimal registrar deployment within contested districts. Each census tract is assigned an expected net plurality return to registration investment index, computed from estimates of registration, partisanship, and turnout. Optimum registration intensity is a logarithmic transformation of a tract's index. These conditions are tested using a merged data set including both census variables and Los Angeles County Registrar data from several 1984 Assembly registration drives. Marginal registration spending benefits, registrar compensation, and the general campaign problem are also discussed.
The last chapter considers social decision procedures at a higher level of abstraction. Chapter Three analyzes the structure of decisive coalition families, given a quasitransitive-valued social decision procedure satisfying the universal domain and ITA axioms. By identifying those alternatives X* ⊆ X on which the Pareto principle fails, imposition in the social ranking is characterized. Every coaliton is weakly decisive for X* over X~X*, and weakly antidecisive for X~X* over X*; therefore, alternatives in X~X* are never socially ranked above X*. Repeated filtering of alternatives causing Pareto failure shows states in X^n*~X^((n+1))* are never socially ranked above X^((n+1))*. Limiting results of iterated application of the *-operator are also discussed.
Resumo:
A series of terl-butylperoxide complexes of hafnium, Cp*2Hf(R)(OOCMe3) (Cp* = ((η5-C5Me5); R = Cl, H, CH3, CH2CH3, CH2CH2CH3, CH2CH2CH2CH3, CH2CHMe2, CH=CHCMe3, C6H5, meta-C6H3(CH2)2) and Cp*(η5-C5(CH3)4CH2CH2CH2)Hf(OOCMe3), has been synthesized. One example has been structurally characterized, Cp*2Hf(OOCMe3)CH2CH3 crystallizes in space group P21/c, with a = 19.890(7)Å, b = 8.746(4)Å, c = 17.532(6)Å, β = 124.987(24)°, V = 2498(2)Å3, Z = 4 and RF = 0.054 (2222 reflections, I > 0). Despite the coordinative unsaturation of the hafnium center, the terl-butylperoxide ligand is coordinated in a mono-dentate ligand. The mode of decomposition of these species is highly dependent on the substituent R. For R = H, CH2CH3, CH2CH2CH3, CH2CH2CH2CH3, CH2CHMe2 a clean first order conversion to Cp*2Hf(OCMe3)(OR) is observed (for R CH2CH3, ΔHǂ = 19.6 kcal•mol-1, ΔSǂ = -13 e.u.). These results are discussed in terms of a two step mechanism involving η2-coordination of the terl-butylperoxide ligand. Homolytic O-O bond cleavage is observed upon heating of Cp*2Hf(OOCMe3) R (R = C6H6, meta-C6H3(CH3)2). In the presence of excess 9,10-dihydroanthracene thermolysis of Cp*2Hf(OOCMe3)C6H6 cleanly affords Cp*2Hf(C6H6)OH and HOCMe3 (ΔHǂ = 22.6 kcal•mol-1, ΔSǂ = -9 e.u.). The O-O bond strength in these complexes is thus estimated to be 22 kcal•mol-1.
Cp*2Ta(CH2)H, Cp*2Ta(CHC6H5)H, Cp*2Ta(C6H4)H, Cp*2Ta(CH2=CH2)H and Cp*2Ta(CH2=CHMe)H react, presumably through Cp*2Ta-R intermediates, with H2O to give Cp*2Ta(O)H and alkane. Cp*2Ta(O)H was structurally characterized: space group P21/n, a= 13.073(3)Å, b = 19.337(4)Å, c = 16.002(3)Å, β = 108.66(2)°, V = 3832(1)Å3, Z = 8 and RF = 0.0672 (6730 reflections). Reaction of terlbutylhydroperoxide with these same starting materials ultimately yields Cp*2Ta(O)R and HOCMe3. Cp*2Ta(CH2=CHR)OH species are proposed as intermediates in the olefin hydride reactions. Cp*2Ta(O2)R species can be generated from the reaction of the same starting materials and O2. Lewis acids have been shown to promote oxygen insertion in these complexes.