Search results for: “bayes”
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The first direct detection of gravitational waves was announced in February of 2015 by the LIGO team, after decades of planning, building and refining their beautiful experiment. Since that time, the US-based LIGO has been joined by the European Virgo gravitational wave telescope (and more are planned around the globe). The first four events that…
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[Update: I have fixed some broken links, and modified the discussion of QBism and the recent paper by Chris Fuchs— thanks to Chris himself for taking the time to read and find my mistakes!] For some reason, I’ve come across an idea called “Knightian Uncertainty” quite a bit lately. Frank Knight was an economist of…
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I recently finished my last term lecturing our second-year Quantum Mechanics course, which I taught for five years. It’s a required class, a mathematical introduction to one of the most important set of ideas in all of physics, and really the basis for much of what we do, whether that’s astrophysics or particle physics or…
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Nearly a decade ago, blogging was young, and its place in the academic world wasn’t clear. Back in 2005, I wrote about an anonymous article in the Chronicle of Higher Education, a so-called “advice” column admonishing academic job seekers to avoid blogging, mostly because it let the hiring committee find out things that had nothing…
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If you’re the kind of person who reads this blog, then you won’t have missed yesterday’s announcement of the first Planck cosmology results. The most important is our picture of the cosmic microwave background itself: But it takes a lot of work to go from the data coming off the Planck satellite to this picture.…
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A week ago, I finished my first time teaching our second-year course in quantum mechanics. After a bit of a taster in the first year, the class concentrates on the famous Schrödinger equation, which describes the properties of a particle under the influence of an external force. The simplest version of the equation is just…
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Among the many other things I haven’t had time to blog about, this term we opened the new Imperial Centre for Inference and Cosmology, the culmination of several years of expansion in the Imperial Astrophysics group. In mid-March we had our in-house grand opening, with a ribbon-cutting by the group’s most famous alumnus. Statistics and…
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I spent a quick couple of days last week at the The Controversy about Hypothesis Testing meeting in Madrid. The topic of the meeting was indeed the question of “hypothesis testing“, which I addressed in a post a few months ago: how do you choose between conflicting interpretations of data? The canonical version of this…
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Yes, more on statistics. In a recent NY Times article, science reporter Dennis Overbye discusses recent talks from Fermilab and CERN scientists which may hint at the discovery of the much-anticipated Higgs Boson. The executive summary is: it hasn’t been found yet. But in the course of the article, Overbye points out that To qualify…
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A couple of weeks ago, a few of my astrophysics colleagues here at Imperial found the most distant quasar yet discovered, the innocuous red spot in the centre of this image: One of them, Daniel Mortlock, has offered to explain a bit more: Surely there’s just no way that something which happened 13 billion years…