Browsing Doctoral Theses by Title
Now showing items 16527-16546 of 22282
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A q-analogue of spanning trees : nilpotent transformations over finite fields
(Massachusetts Institute of Technology, 2009)The main result of this work is a q-analogue relationship between nilpotent transformations and spanning trees. For example, nilpotent endomorphisms on an n-dimensional vector space over Fq is a q-analogue of rooted spanning ... -
A quadrature-based technique for robust design with computer simulations
(Massachusetts Institute of Technology, 2007)This thesis presents a method for estimating transmitted variance to enable robust parameter design in computer simulations. This method is based on the Hermite-Gaussian quadrature for a single input. It is extended to ... -
Qualitative analysis of transience in population dynamcis
(Massachusetts Institute of Technology, 2000) -
A qualitative and quantitative study of the distribution of pelagic sediment in the Atlantic Basin
(Massachusetts Institute of Technology, 1997)Pelagic sedimentation is the primary modifier of topography generated by ridge-associated volcanic and tectonic processes. This thesis represents an effort to understand the processes of, and the general distribution of, ... -
Qualitative knowledge construction for engineering systems : extending the design structure matrix methodology in scope and procedure
(Massachusetts Institute of Technology, 2007)This thesis presents a new modeling framework and research methodology for the study of engineering systems. The thesis begins with a formal conceptualization of Engineering Systems based upon a synthesis of various ... -
Qualitative modeling of continuous chemical processes and applications to fault diagnosis
(Massachusetts Institute of Technology, 1990) -
Quality of care and drug surveillance : a data-driven perspective
(Massachusetts Institute of Technology, 2008)In this thesis, we describe the use of medical insurance claims data in three important areas of medicine. First, we develop expert- trained statistical models of quality of care based on variables derived from insurance ... -
Quality of working life systems in municipalities : a lasting innovation
(Massachusetts Institute of Technology, 1987) -
Quantative [sic] selection and design of model generation architectures for on-orbit autonomous assembly
(Massachusetts Institute of Technology, 2010)On-orbit assembly is an enabling technology for many space applications. However, current methods of human assisted assembly are high in cost and risk to the crew. Thus, there is a desire to automate the on-orbit assembly ... -
Quantifiable MRI changes in cerebral white matter and their importance to aging, cognition, and Alzheimer's disease
(Massachusetts Institute of Technology, 2017)Alzheimer's disease (AD) is a neurodegenerative disease for which there are no preventative or therapeutic interventions. It is currently understood to be linked to the accumulation of pathologic proteins in the brain. In ... -
Quantification of benzo[a]pyrene-diol-epoxide adducts by laser-induced fluorescence spectroscopy
(Massachusetts Institute of Technology, 1999)Quantification of adducts in human samples is a challenging task in analytical chemistry. Humans are typically exposed to low levels of a wide range of different carcinogens. As a result, adduct quantification requires ... -
Quantification of lower hybrid wave absorption in the edge of the Alcator C-Mod Tokamak
(Massachusetts Institute of Technology, 2016)A 1 MW Lower Hybrid Current drive (LHCD) radiofrequency system is used to replace inductive drive on the Alcator C-Mod tokamak. It was designed to test Advanced Tokamak (AT) scenarios for future steady-state diverted, high ... -
Quantification of microRNA regulation and its consequences at the single cell level
(Massachusetts Institute of Technology, 2015)MicroRNAs (miRNAs) are a class of small non-coding RNAs which play important roles in post transcriptional gene regulation. miRNAs regulate more than half of mammalian protein-coding genes. They have been found to participate ... -
Quantification of receptor-ligand interactions on bioengineered autocrine call system : a comparision of theory and experiments
(Massachusetts Institute of Technology, 1997) -
Quantifier rank spectrum of L-infinity-omega
(Massachusetts Institute of Technology, 2006)In Part A we will study the quantifier rank spectrum of sentences of L!1,!. We will show that there are scattered sentences with models of arbitrarily high but bounded quantifier rank. We will also consider the case of ... -
Quantifying and modelling adaptive astronaut movement : motion strategies for long-duration spaceflight missions
(Massachusetts Institute of Technology, 2006)Past spaceflight experience has shown that astronauts adapt their motor control strategies to microgravity movements after approximately four weeks of microgravity exposure. A similar (but typically shorter) re-adaptation ... -
Quantifying and reducing the uncertainties in global contrail radiative forcing
(Massachusetts Institute of Technology, 2021-09)Condensation trails, or contrails, are line-shaped ice clouds that form in the exhaust plume of aircraft engines under sufficiently cold and humid conditions. They can persist for several hours, growing to be indistinguishable ... -
Quantifying barriers to recycling plastic packaging in the United States
(Massachusetts Institute of Technology, 2024-02)Staggering statistics about plastic waste and attendant concerns have driven multi-stakeholder engagement from entrepreneurs searching for innovative technological solutions and companies pledging circular measures to ... -
Quantifying channelized submarine depositional systems from bed to basin scale
(Massachusetts Institute of Technology, 2004)The challenges of directly observing active turbidity currents necessitates the consideration of preserved deposits for deciphering the behavior of these systems. In this thesis, I take advantage 3-D subsurface seismic ... -
Quantifying China's carrying capacity : using optimization to explore sustainable food production
(Massachusetts Institute of Technology, 2018)Feeding the world's growing population in an environmentally sustainable way is a complex social and engineering challenge. In this thesis, we develop a novel method for assessing the number of people that can be fed ...