# Video Library

Since 2002 Perimeter Institute has been recording seminars, conference talks, and public outreach events using video cameras installed in our lecture theatres.  Perimeter now has 7 formal presentation spaces for its many scientific conferences, seminars, workshops and educational outreach activities, all with advanced audio-visual technical capabilities.  Recordings of events in these areas are all available On-Demand from this Video Library and on Perimeter Institute Recorded Seminar Archive (PIRSA)PIRSA is a permanent, free, searchable, and citable archive of recorded seminars from relevant bodies in physics. This resource has been partially modelled after Cornell University's arXiv.org.

## Signals of asymmetric dark matter from galactic center pulsar implosions

Tuesday Jan 20, 2015
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If dark matter is asymmetric, fermionic, and self-interacting, it may form black holes in pulsars at the galactic center. In this case, a measurable maximum attainable pulsar age would track the density of the dark matter halo, with the oldest pulsars being allowed in the least dense parts of the halo. This could explain a recent observation, that there are not as many pulsars in the galactic center as expected.

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## Foundations of Quantum Mechanics-13

Tuesday Jan 20, 2015
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## Spinodal Instabilities and Super-Planckian Excursions in Natural Inflation

Tuesday Jan 20, 2015
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Models such as Natural Inflation that use Pseudo-Nambu-Goldstone bosons (PNGB's) as the inflaton are attractive for many reasons. However, they typically require trans-Planckian field excursions $\Delta \Phi>M_{\rm Pl}$, due to the need for an axion decay constant $f>M_{\rm Pl}$ to have both a sufficient number of e-folds {\em and} values of $n_s,\ r$ consistent with data.

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## Gravitational Physics-12

Tuesday Jan 20, 2015
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## Standard Model-12

Tuesday Jan 20, 2015
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## Foundations of Quantum Mechanics-12

Monday Jan 19, 2015
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## Foundations of Quantum Mechanics-11

Monday Jan 19, 2015
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## Gravitational Physics-11

Monday Jan 19, 2015
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## Standard Model-11

Monday Jan 19, 2015
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## Foundations of Quantum Mechanics-10

Friday Jan 16, 2015
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## Next Public Lecture

### Jon Butterworth, University College London

Wednesday Apr 01, 2015

## RECENT PUBLIC LECTURE

### WATER STRESS: SEEKING SOLUTIONS IN THE UNUSUAL PROPERTIES OF WATER

Speaker: Marcia Barbosa