Browsing FAS Theses and Dissertations by Title
Now showing items 609-628 of 6097
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Categorical dynamics on stable module categories
(2023-05-16)Let A be a finite connected graded cocommutative Hopf algebra over a field k. There is an endofunctor tw on the stable module category StMod A of A which twists the grading by 1. We show the categorical entropy of tw is ... -
Categorical Moy-Prasad theory and applications to geometric Langlands
(2022-05-10)For any $G((t))$-category, we define a filtration which provides a categorification of the notion of depth studied by Moy and Prasad in the context of representations of a p-adic group. We also prove a generation statement ... -
Caudal Transcription Factors in Hematopoietic Development
(2013-02-12)During embryogenesis, hematopoietic cells arise from the lateral plate mesoderm (LPM) following gastrulation. The transcriptional program required for this LPM to blood switch is not fully understood. Previous work on a ... -
"Caught in a Whirlwind:" Painting in Baghdad in the Late Sixteenth-Early Seventeenth Centuries
(2016-05-12)Throughout the sixteenth and seventeenth centuries, the province of Baghdad changed hands between the Aq Qoyunlu Turkmen tribal confederation, the Safavids and the Ottomans. From the last decade of the sixteenth to the ... -
Causal Inference for Observational Studies on Networks
(2021-01-20)Causal inference methods are powerful techniques which allow the practitioner to estimate treatment effects while simultaneously injecting cause and effect into the problem at hand. However, when causal estimation procedures ... -
Causal Inference in Health Services Research
(2020-09-11)In Chapter 1, we introduce a common subject of health services research, the "volume-outcomes relationship," or the study of the relationship between patient outcomes and hospital and/or physician case volume. We describe ... -
Causal Inference in Psychiatry Research
(2022-05-16)In Chapter 1, we show how to emulate a hypothetical randomized trial ("target trial") that would answer our questions about the comparative effectiveness of complex dynamic treatment strategies in major depression using ... -
Causal Inference Under Network Interference: A Framework for Experiments on Social Networks
(2017-01-26)No man is an island, as individuals interact and influence one another daily in our society. When social influence takes place in experiments on a population of interconnected individuals, the treatment on a unit may affect ... -
Causal Inference with Complex Exposures in Observational Studies
(2021-03-05)Many existing causal inference methods address the ideal situation of estimating deterministic causal effects of a single binary exposure assuming non-interference. In real-world observational studies, data harmonized from ... -
Causal Inference with Limited Resources
(2022-03-17)Constraints on treatment resources present problems in many practical settings. For example, during the current coronavirus disease 2019 pandemic, several health care systems have experienced shortages of ventilators, ... -
Causal Mediation Analysis Reveals Syntactic Agreement Mechanisms in Neural Language Models
(2021-06-23)Targeted syntactic evaluations have demonstrated the ability of language models to perform subject-verb agreement given difficult contexts. Although this is well established, the mechanisms by which neural language models ... -
Causal Propositions on Air Pollution and Human Health
(2021-01-20)Fine particulate matter (PM2.5), ozone (O3), and nitrogen dioxide (NO2) are considered leading threats to human health, largely based on historical associations calculated from traditional statistical analyses. These studies ... -
Causal Selection of Covariates in Regression Calibration for Mismeasured Continuous Exposure
(2023-03-14)Regression calibration has been used to correct for the bias in causal effect due to measurement error in continuous exposures, but no systematic discussion exists on how to determine covariates appropriate in measurement ... -
Causality in Epigenetics: Strategies for Targeted Epigenome Engineering of Transcriptional Regulation and Genome Topology
(2018-05-14)Changes in epigenetic states are at the heart of normal developmental processes and also underlie many human diseases. Studies to date have established strong associations between histone post-translational modifications, ... -
Causation in the Social World
(2022-05-11)Causation and causal claims abound in the social world as much as in the natural world. But a dominant theory of causation, prevalent among philosophers of causation and scientists who pursue causal inquiry, an interventionist ... -
Causes and consequences of coexistence in the Vachellia drepanolobium ant-plant mutualism
(2017-05-10)This thesis focuses on a mutualism between the East African acacia tree Vachellia drepanolobium and the species of canopy-dwelling ants that inhabit it. The tree provides the ants with nesting space in the canopy and ... -
Causes and Consequences of Cooperative Construction in the Mice Mus spicilegus and Peromyscus polionotus
(2013-03-14)The cooperative construction of shared dwellings is a phylogenetically-widespread evolutionary puzzle. Shared shelters are common goods – all individuals in the shelter benefit, at the expense of those individuals that ... -
Causes and Consequences of Lung Loss in Salamanders
(2016-02-26)Lungs were once thought to be a universal feature of tetrapods and essential for vertebrate life on land. This view changed in the late 19th century with the discovery of several salamander species that lack lungs. Since ... -
The Causes of the Divergent Development of Banking Regulation in the U.S., Canada, and Spain
(2016-05-02)Why did different countries create different systems of banking regulation in the years leading up to the recent global financial crisis, despite adhering to the same transnational regulatory agreement, the 1988 Basel ... -
Causes, evolution, and dynamics of ice ages in the last 3 million years
(2022-01-06)This thesis concerns the response of global climate to variations in Earth’s orbital configuration and atmospheric CO2 levels since major Northern Hemisphere ice sheets appeared three million years ago. A first chapter ...