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On Spectral Operators in Finite von Neumann Algebras
(2020-12-04)
An operator on a Hilbert space is said to be spectral if it has a suitably well-behaved `idempotent-valued' spectral measure. Dunford introduced these operators and also provided the following characterization: An operator ...
The Evolution of Grand Valley in the Upper Colorado River Basin: A Diluvial Hypothesis for the Geneses of Alpine Terraces
(2020-11-30)
Rivers are thought to form fluvial terraces. The geneses of terraces depend on climatic changes because of the variations of riverbed slopes and sediment fluxes. Particularly, generating erosional-strath terraces requires ...
The Enabler Architect: Towards a Framework for Participation in Social Housing
(2020-11-12)
In Latin America, social housing refers to low-income housing projects provided or subsidized by the state. This dissertation explores an approach for the design and conception of social housing incorporating open building, ...
Synthetic Antioxidant Polymers: Redox Properties, Metal Binding, and Anticorrosion Performance
(2020-12-07)
This dissertation is focused on the exploration of the antioxidant and redox properties of synthetic linear polyphenol polymers, their interaction with metal ions, and application in corrosion protection of metal substrates. ...
EXPERIMENTS AND MODELS FOR OPERATION OF A SEALED ENDS SQUEEZE FILM DAMPERS: A STEP TOWARDS QUANTIFYING AIR INGESTION IN SQUEEZE FILMS
(2019-11-22)
Squeeze film dampers (SFDs) in high-performance turbomachinery reduce rotor motion amplitudes as it traverses a critical speed or when the system has a dynamic instability, thus ensuring system reliability. To improve the ...
Heat Transfer and Friction Effect of Double-Sided Partial Length Strip Fin Arrays in High Aspect Ratio Rectangular Channel
(2020-11-16)
Friction loss and heat transfer enhancement measurements were obtained for double-sided, partial length, strip fin arrays within a high aspect ratio (AR=8), rectangular channel. Fins were arranged in a staggered array ...
A Single-Phase GaN Totem-Pole Bridgeless PFC with an H-Bridge Active Power Decoupling
(2020-11-12)
This research proposes a single-phase power factor correction (PFC) approach employing a GaN Totem-Pole topology with an H-Bridge Active Power Decoupling (APD). The proposed topology assures the achievement of high efficiency ...
Redevelopment of Vacant Land: Planning Perspectives on Disaster Recovery
(2020-11-04)
After major disaster events, there is regularly a loss of population and increases in amounts of vacant land. Disaster recovery is notoriously uneven spatially, resulting in some neighborhoods lagging behind their neighbors ...
A Modified Elasto-Plastic Pressure Dependent Numerical Combined Hardening Model for Characterizing Permanent Deformation under Cyclic Loading
(2020-12-01)
Rutting is an extremely important load related distress in flexible pavements and is attributed to frequent passes of tire load, resulting in formation of longitudinal depression in the wheel track. This research developed ...
Puerto Rico and U.S. Empire in the Caribbean, 1898-1936
(2020-12-04)
This study examines Puerto Rico’s role as a “bridge between the Americas” from the War of 1898 to the 1930s, and the consequences for inter-American relations and Puerto Rican national identity. Specifically, I address ...