374 research outputs found

    Subtracting glitches from gravitational-wave detector data during the third LIGO-Virgo observing run

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    Data from ground-based gravitational-wave detectors contains numerous short-duration instrumental artifacts, called ‘glitches’. The high rate of these artifacts in turn results in a significant fraction of gravitational-wave signals from compact binary coalescences overlapping glitches. In LIGO-Virgo’s third observing run, ≈20% of gravitational-wave source candidates required some form of mitigation due to glitches. This was the first observing run where glitch subtraction was included as a part of LIGO-Virgo-KAGRA data analysis methods for a large fraction of detected gravitational-wave events. This work describes the methods to identify glitches, the decision process for deciding if mitigation was necessary, and the two algorithms, BayesWave and gwsubtract, that were used to model and subtract glitches. Through case studies of two events, GW190424_180648 and GW200129_065458, we evaluate the effectiveness of the glitch subtraction, compare the statistical uncertainties in the relevant glitch models, and identify potential limitations in these glitch subtraction methods. We finally outline the lessons learned from this first-of-its-kind effort for future observing runs

    Learning through impact : a journey through the grant-writing process : honors thesis (HONRS 499)

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    The following materials are a reflection of the grant writing and seeking processes as experienced through grant writing for Camp Millhouse, Inc., a non-profit organization in South Bend, Indiana. Camp Millhouse is a residential summer camp program dedicated to improving the quality of life of individuals with developmental disabilities. The writings and documents included are the direct result of over eight months of collaboration with Camp Millhouse Executive Director and Director as well as a number of other invaluable individuals assisting in community or academic capacities. The project has resulted in the awarding of monies to Camp Millhouse for construction and operation of an eight-element low ropes course in the amount of $2,500. A proposal for the remaining funds is currently pending and will be decided on March 16, 2010. The ways in which the grant writing process has had a professional, academic, personal and community impact are defined and discussed. Also included are supplemental materials which will assist future beginning grant writers and researchers.Thesis (B.?.)"March 5, 2010."Honors Colleg

    1976 RDA 1 (M-Q)

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    Black and white photo; mounted on paper, with names.Back - Peter Miller, Kimber Millhouse, John Morris, Richard Nicholls, Colin Nott, Steven O'Connor; centre - Catherine O'Grady, Michael O'Leary, Fiona Palmer, Stow Penniment, Allan Piggott; front - Ingrid Piper, David Powell, Gregory Powell, Richard Prebble, Anthony Proud, Maria Quinn

    The Supreme Court, religion, and the intent of the Framers: an analysis of the sitting Justices' Establishment Clause philosophies

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    The purpose of this study was to determine the philosophical orientation of each sitting Justice on matters pertaining to the Establishment Clause of the First Amendment to the United States Constitution. A second purpose is to determine whether their philosophies change based on the issues involved. The research questions that drove this analysis are: 1) What theories of original intent can be derived from the literature? 2) To which variation of original intent, separationism or nonpreferentialism, do the individual Justices subscribe? 3) What are the various Establishment Clause issues that have been heard by the Court? 4) Do the individual Justices’ philosophies change depending on the issue? By studying the text of the First Amendment, events surrounding its passage and other writings of the Framers of the Constitution, scholars have posited two theories of the original intent of the Framers to explain the meaning of “an establishment of religion.” The first theory is termed nonpreferentialism. Nonpreferentialists argue that government may support religion so long as that support is nondiscriminatory among religious sects. The second theory, separationism, states that government may not support one, any or all religions. Separationists argue that a "wall of separation” should exist between church and state while nonpreferentialists opine that no such wall was intended by the Framers. The United States Supreme Court has jurisdiction over issues involving the establishment of religion. The individual Justices have certain predilections with regard to governmental support of religion and have written opinions in cases and scholarly articles in which they articulate their philosophies. Using traditional legal research methods, this study has demonstrated that of the seven sitting Justices that have written opinions or scholarly articles pertaining the Establishment Clause, Rehnquist, Scalia and Thomas, are consistently nonpreferentialist in their philosophical orientation. One justice, Stevens, is consistently separationist. Souter has written consistently separationist opinions, yet joined O’Connor’s nonpreferentialist concurrence in one case. Kennedy, and O’Connor are neither consistently separationist nor nonpreferentialist. The philosophical orientation of those Justices changes based on the nature of the Establishment Clause issue.Ed. D

    Corporate Governance in Non-Bank Financial Entities

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    The law governing the supply of financial products and financial services is a minefield of opposing political, social and economic interests. This book analyses the issues and history, provides insight into competitive jurisdictions and proposes law reform to better address the objective of investors as financial consumers.This ground-breaking book provides a comprehensive legal review of the Australian non-bank financial sector. It analyses and explains its evolution since deregulation in 1981 until today. It explores non-bank financial entities (including managed investment schemes and superannuation funds), which largely have not been examined in the recent Banking Royal Commission and other inquiries.The author quantifies and explains the causes of systemic and cyclical failure of the law in the sector, bringing together the various sources of law applicable to the various types of legal entity, and also explains the difficulties and choices faced by directors and trustees of these entities. In doing so, he positions current regulation in the business context. A comparative analysis of regulation in other jurisdictions identifies both successful and unsuccessful strategies for the sector. The author puts forward suggestions for reform by way of guidance for future policy development and its implementation in law.Corporate Governance in Non-Bank Financial Entities is essential reading for legal and corporate advisors in the financial sector, and a valuable resource on the duties of directors and trustees of the affected entities.FeaturesUnique and comprehensive analysisUnderpinned by in-depth, qualitative researchIdentifies the causes of regulatory failure and consequent impacts on investors and the Australian economy more broadlyProvides concrete suggestions for refor

    Leveraging waveform complexity for confident detection of gravitational waves

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    The recent completion of Advanced LIGO suggests that gravitational waves (GWs) may soon be directly observed. Past searches for gravitational-wave transients have been impacted by transient noise artifacts, known as glitches, introduced into LIGO data due to instrumental and environmental effects. In this work, we explore how waveform complexity, instead of signal-to-noise ratio, can be used to rank event candidates and distinguish short duration astrophysical signals from glitches. We test this framework using a new hierarchical pipeline that directly compares the Bayesian evidence of explicit signal and glitch models. The hierarchical pipeline is shown to have strong performance, and in particular, allows high-confidence detections of a range of waveforms at realistic signal-to-noise ratio with a two detector network

    W[h]ither Australia? Will Parliament Act?

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    Australia is replete with commissions and inquiries into egregious behaviour in its financial sector. This author has quantified the effects of those behaviours on individuals and the wider economy. These investigations include Heydon (elimination of unhealthy culture), Hayne (confluence of law and morality) and the Productivity Commission (trust). The most important Hayne recommendations – which would reduce Australia’s international reputation as a regulatory outlier and better reflect community expectations remain unresolved. Confused parliamentary leadership has facilitated corruption of the financial regulatory system which has for many people been an abject disaster. The Australian government must act. It must do so strategically. It must establish the nexus between the intent of the law and its practical implementation for those it purports to serve. Parliament has yet to debate the underlying causes focussing instead on tactical and punitive responses. If it does, then it must confront the distinction between prescriptive statute and principles-based supervision, recognising the power of antecedent fiduciary law. These are philosophical as well as legal questions. Hayne pointed to the need for a framework for the re-integration of the intent and spirit of the law with its statutory manifestations, presently scattered and inconsistent. This paper is that framework. Without it, much of the financial services and products sectors may continue their descent into the Stygian gloom of costly and inconsistent multi-layered bespoke regulation. An unintended consequence of paternalist policy will be fewer market participants, less choice and fewer opportunities to develop financial literacy
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