Structural analysis of interior layered deposits in north and south Coprates Chasma, Mars

Interior layered deposits within an embayment in the northern as well as near the southern wall of Coprates Chasma in the Valles Marineris, Mars are studied using HRSC, CTX, HiRISE and CRISM data. In the northern embayment, layered deposits outcrop in three separate locations (a western deposit, a central deposit and an eastern deposit). The central layered deposit in the north has a stratigraphic thickness of 2 km. The western layered deposit abuts against the chasma wall appearing to have a relatively un-eroded depositional surface. The eastern deposit is near a landslide scar which appears to have exposed basement layering showing downward displacement. This northern embayment is suggested to have been an ancestral basin. The triangular edged deposit near the southern wall of Coprates Chasma has an elongated mound protruding from the central edge and is suggested to be the outer limits of a fault block which is back rotated 6° south. The rotation may be the result of the Valles Marineris opening.

Rethinking Fiscal Decentralization Policies in Developing Economies: A Case Study of Ghana

This thesis invites geographers to pay more attention to public policy research by addressing the need to rethink fiscal decentralization policies in Ghana. By applying “Simandan’s wise stance in human geography” and “Grix’s building blocks of social research design”, I developed a conceptual framework that unites two incommensurable ontological and epistemological research positions in geography—the positive and normative positions. I used the framework to investigate two key research questions. First, does fiscal decentralization actually work in Ghana? Through quantitative analysis of empirical revenue and expenditure data (1994-2011) of local governments in Ghana, this study reveals significant issues of inefficiency, inequity, and unaccountability. Local governments generate less revenue, and therefore depend largely on central government transfers for developing their jurisdictions. Worse yet, these transfers are highly unpredictable in terms of amount and timing. Even though a multivariate regression analysis revealed that these transfers are apolitical, the actual disbursement formula tends to focus on equality instead of equity. Additionally, the unclear expenditure assignments in each locality make accountability difficult. In view of these problems, I addressed the question: why is fiscal decentralization held out as a good thing in Ghana? By drawing lessons from Foucault’s and Escobar’s critical discourse analysis, I traced a genealogy of Ghana’s fiscal decentralization. I found that the policy is held out as a good thing in Ghana because of the triangular operation of multiplicities of power, knowledge, and truth regimes at the local, national and international scale. I concluded that although nation-states remains a necessary causal link in fiscal decentralization policy process in Ghana, direct and indirect international involvement have profound effect on these policies. Therefore, rethinking fiscal decentralization involves acknowledging the complex intermingling effects that global, national, and local territories produce.

Royal Bank of Canada records, 1973-1977

In 1973, the Royal Bank of Canada began construction on a new office in downtown Toronto known as the Royal Bank Plaza. The $100 million construction project consisted of two triangular office towers linked by a glass-enclosed banking hall. In addition to housing the Royal Bank of Canada’s Ontario headquarters, the Plaza included a two-level shopping concourse with restaurants and boutiques, as well as office space available for lease. The Plaza officially opened on March 10, 1977.

The Effects of Magnetic Dilution and Applied Pressure on Several Frustrated Spinels

The effects of magnetic dilution and applied pressure on frustrated spinels GeNi2O4, GeCo2O4, and NiAl2O4 are reported. Dilution was achieved by substitution of Mg2+ in place of magnetically active Co2+ and Ni2+ ions. Large values of the percolation thresholds were found in GeNi(2-x)MgxO4. Specifically, pc1 = 0.74 and pc2 = 0.65 in the sub-networks associated with the triangular and kagome planes, respectively. This anomalous behaviour may be explained by the kagome and triangular planes behaving as coupled networks, also know as a network of networks. In simulations of coupled lattices that form a network of networks, similar anomalous percolation threshold values have been found. In addition, at dilution levels above x=0.30, there is a T^2 dependency in the magnetic heat capacity which may indicate two dimensional spin glass behaviour. Applied pressures in the range of 0 GPa to 1.2 GPa yield a slight decrease in ordering temperature for both the kagome and triangular planes. In GeCo(2-x)MgxO4, the long range magnetic order is more robust with a percolation threshold of pc=0.448. Similar to diluted nickel germanate, at low temperatures, a T^2 magnetic heat capacity contribution is present which indicates a shift from a 3D ordered state to a 2D spin glass state in the presence of increased dilution. Dynamic magnetic susceptibility data indicate a change from canonical spin glass to a cluster glass behaviour. In addition, there is a non-linear increase in ordering temperature with applied pressure in the range P = 0 to 1.0 GPa. A spin glass ground state was observed in Ni(1-x)MgxAl2O4 for (x=0 to 0.375). Analysis of dynamic magnetic susceptibility data yield a characteristic time of tau* = 1.0x10^(-13) s, which is indicative of canonical spin glass behaviour. This is further corroborated by the linear behaviour of the magnetic specific heat contribution. However, the increasing frequency dependence of the freezing temperature suggests a trend towards spin cluster glass formation.