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Showing posts from 2016

Converting probabilities between time-intervals

This is the first in an irregular sequence of snippets about some of the slightly more technical aspects of uncertainty and risk assessment.  If you have a slightly more technical question, then please email me and I will try to answer it with a snippet.

Suppose that an event has a probability of 0.015 (or 1.5%) of happening at least once in the next five years. Then the probability of the event happening at least once in the next year is 0.015 / 5 = 0.003 (or 0.3%), and the probability of it happening at least once in the next 20 years is 0.015 * 4 = 0.06 (or 6%).

Here is the rule for scaling probabilities to different time intervals: if both probabilities (the original one and the new one) are no larger than 0.1 (or 10%), then simply multiply the original probability by the ratio of the new time-interval to the original time-interval, to find the new probability.

This rule is an approximation which breaks down if either of the probabilities is greater than 0.1. For example, to scal…

Deploying and Servicing a Seismic Network in Central Italy

From a scientific point of view, the seismicity that is hitting Central Italy presents itself as an unmissable opportunity for seismologists to analyse the triggering and the evolution of an earthquake sequence. From the tens of instruments installed in the affected area, a huge amount of data is being collected. Such a well-recorded sequence will allow us to produce a comprehensive seismic catalogue of events. On this big quantity of data, new algorithms will be developed and tested for the characterisation of even the smallest earthquakes. Moreover, they will enable the validation of more accurate and testable statistical and physics-based forecast models, which is the core objective of my Ph.D. project.

The Central Apennines are one of the most seismically hazardous areas in Italy and in Europe. Many destructive earthquakes have occurred throughout this region in the past, most recently the 2009 MW = 6.4 L’Aquila event. On August 24th, just 43 km North of the 2009 epicentre, an ea…

Brexit: can research light the way?

What could Brexit mean for UK science? What impact will it have on UK fisheries? Could Brexit be bad news for emissions reductions? These were just some questions discussed at a Parliamentary conference last week, organised by the Parliamentary Office of Science and Technology (POST), the Commons Library and Parliament’s Universities Outreach team.

MPs researchers, Parliamentary staff and academic researchers from across the country came together to consider some of the key policy areas affected by the UK’s decision to leave the EU.

Why does academic research matter to Parliament? Given the unchartered waters that Parliament is facing as the UK prepares to withdraw from the EU, it is more important than ever that Parliamentary scrutiny and debate is informed by robust and reliable evidence.

Academic research is expected to meet rigorous standards of quality, independence and transparency. Although it is far from being the only source of evidence relevant to Parliament, it has vital ro…

The Diamond Battery – your ideas for future energy generation

On Friday 25th November, at the Cabot Institute Annual Lecture, a new energy technology was unveiled that uses diamonds to generate electricity from nuclear waste. Researchers at the University of Bristol, led by Prof. Tom Scott, have created a prototype battery that incorporates radioactive Nickel-63 into a diamond, which is then able to generate a small electrical current.
Details of this technology can be found in our official press release here:
Despite the low power of the batteries (relative to current technologies), they could have an exceptionally long lifespan, taking 5730 years to reach 50% battery power. Because of this, Professor Tom Scott explains:
“We envision these batteries to be used in situations where it is not feasible to charge or replace conventional batteries. Obvious applications would be in low-power electrical devices where long life of the energy source is needed, such as pacemakers, satellite…

What does Trump mean for the environment?

Several weeks ago, I was walking along Avenida Paulista in São Paulo. Through the noise of the traffic, the familiar shout of one man’s name could be heard. ‘Trump, Trump, Trump’ echoed across the street.Somehow I had stumbled upon a ‘Brazilians for Trump’ rally. A group of 40 people stood on the pavement, clutching signs that read ‘Women for Trump’, ‘Jews for Trump’, ‘Gays for Trump’. This struck me; such demographics holding such signage represented for me a similar message to ‘trees for deforestation’.
Yet, the votes are in. The electoral tally has been made and one fact is obvious: Donald Trump’s popularity transcended demography. As, House Speaker, Paul Ryan has said, Trump “heard a voice out in this country that no one else heard. He connected in ways with people that no one else did. He turned politics on its head.”
Key here is not only Trump’s victory, but also how the Republican Party has been able to ride his coattails to majorities across both the Senate and the House of Repr…

Geology for Global Development: 4th Annual Conference

Sustainable mining, solar energy, seismic risk; the 4th Geology for Global Development Conference held at the Geological Society in London had it all.  Geology for Global Development is a charity set up to with the aim of relieving poverty through the power of geology. The charity is chasing the UN’s sustainable developing goals by inspiring a generation of young geologists to use their training as a tool for positive global change.
The charity is closely linked to several universities meaning the one-day event was awash with bright ideas from young geologists from every corner of the UK. Add to the mix experts in policy and communication including BBC presenter and academic Professor Iain Stewart and you have the recipe for a fascinating day.

The programme was impressively diverse, jumping effortlessly from panel discussions on mining and sustainability to group discussions on exploring best practice. There were so many important messages I couldn’t regurgitate everything into a shor…

Post-truth politics: Why do facts no longer matter to so many people?

Virtually unknown a few years ago, the terms “post-fact” and “post-truth” have exploded onto the media scene in 2016, with thousands of articles around the globe expressing concern over the absence of a shared body of facts and evidence in public and political debate. This concern is buttressed by evidence that the public is misinformed about a range of issues, from vaccinations to climate change and the fabled Weapons of Mass Destruction in Iraq. Politicians have always sought refuge in fantasy or subterfuge when confronted by uncomfortable facts. So why the sudden concern with the emergence of “post-truth” politics? Two factors can be identified that confirm that the landscape of public discourse has changed: first, the brazenness with which some politicians have unshackled themselves from the constraints of evidence and reality, and second, the public’s acquiescence with this flight into fantasy land.
These factors are particularly evident in two political contests that have domina…