13,721 research outputs found
Ricci-Positive geodesic flows and point-completion of static monopole fields
We use methods of complex analysis to extend the bundle structure across a
removable point-singularity in a Sasakian three-manifold.Comment: 14 page
Categoricity and covering spaces
This thesis develops some of the basic model theory of covers of algebraic
curves. In particular, an equivalence between the good model-theoretic
behaviour of the modular j-function, and the openness of certain Galois
representations in the Tate-modules of abelian varieties is described.Comment: DPhil Thesi
Wear-Out Sensitivity Analysis Project Abstract
During the course of the Summer 2015 internship session, I worked in the Reliability and Maintainability group of the ISS Safety and Mission Assurance department. My project was a statistical analysis of how sensitive ORU's (Orbital Replacement Units) are to a reliability parameter called the wear-out characteristic. The intended goal of this was to determine a worst case scenario of how many spares would be needed if multiple systems started exhibiting wear-out characteristics simultaneously. The goal was also to determine which parts would be most likely to do so. In order to do this, my duties were to take historical data of operational times and failure times of these ORU's and use them to build predictive models of failure using probability distribution functions, mainly the Weibull distribution. Then, I ran Monte Carlo Simulations to see how an entire population of these components would perform. From here, my final duty was to vary the wear-out characteristic from the intrinsic value, to extremely high wear-out values and determine how much the probability of sufficiency of the population would shift. This was done for around 30 different ORU populations on board the ISS
- …