The contribution of Fermi-2LAC blazars to diffuse TeV-PeV neutrino flux
Aartsen, M
Abraham, K
Ackermann, M
Sarkar, S
Astrophysical Journal
volume 835
issue 1
45
(01 Jan 2017)
Exposure patterns driving Ebola transmission in West Africa: A retrospective observational study.
Bilivogui, P
Blake, I
Brennan, R
Cawthorne, A
Cleary, E
Jombart, T
Keita, S
Gutierrez, G
Kannangarage, N
Moller, T
Meijers, S
Mohamed, Y
Morgan, O
Nedjati-Gilani, G
Nyenswah, T
Riley, S
Rondy, M
Sagrado, M
Savulescu, C
Schumacher, D
Seyler, T
Shah, A
Van Kerkhove, M
Wesseh, C
PLoS Medicine
volume 13
issue 11
e1002170
(01 Nov 2016)
Fri, 25 Nov 2016
11:45 -
12:45
L4
InFoMM CDT Group Meeting
Roxana Pamfil, Rachel Philip and Asbjørn Riseth
(Mathematical Institute)
Abstract
Roxana Pamfil
Analysis of consumer behaviour with annotated networks
Rachel Philip
Modelling droplet breakup in a turbulent jet
Asbjørn Riseth
Stochastic optimal control of a retail pricing problem
Wed, 30 Nov 2016
15:00
15:00
L5
On Ring Learning with Errors and its uses in cryptography
Ana Costache
(University of Bristol)
Abstract
We introduce Learning with Errors and Ring Learning with Errors, two hard
lattice problems which are widely used for security of Homomorphic
Encryption schemes. Following a study we conducted comparing four such
schemes, the best scheme was the so-called BGV scheme, introduced by
Brakerski-Gentry-Vaikuntanathan in 2012. We present it as an example of a
ring-based homomorphic scheme, discussing its number theoretic
optimisations.
Wed, 15 Feb 2017
15:00
15:00
Ouroboros: A Provably Secure Proof-of-Stake Blockchain Protocol
Aggelos Kiayias
(University of Edinburgh and IOHK)
Abstract
We present “Ouroboros,” the first blockchain protocol based on proof of stake with rigorous security guarantees. We establish security properties for the protocol comparable to those achieved by the bitcoin blockchain protocol. As the protocol provides a “proof of stake” blockchain discipline, it offers qualitative efficiency advantages over blockchains based on proof of physical resources (e.g., proof of work). We showcase the practicality of our protocol in real world settings by providing experimental results on transaction processing time obtained with a prototype implementation in the Amazon cloud. We also present a novel reward mechanism for incentivizing the protocol and we prove that given this mechanism, honest behavior is an approximate Nash equilibrium, thus neutralizing attacks such as selfish mining.
Joint work with Alexander Russell and Bernardo David and Roman Oliynykov
From gigantic hanging tapestries to small pocket globes, the Ashmolean covers a whole range of navigational equipment. In the second of our Random Walks films featuring mathematicians let loose in the Ashmolean Museum, Vicky Neale from Oxford Mathematics demonstrates that she knows her place in the world. Through interactive examples that can be imitated at home, Vicky demonstrates the difficulties that cartographers have faced throughout the centuries.
Thu, 24 Nov 2016
14:00 -
15:15
L4
Fri, 27 Jan 2017
16:00
16:00
L1
Mathematics and Auction Design
Paul Klemperer
(University of Oxford)
Abstract
Mathematical methods are increasingly being used to design auctions. Paul Klemperer will talk about some of his own experience which includes designing the U.K.'s mobile phone licence auction that raised £22.5 billion, and a new auction that helped the Bank of England in the financial crisis. (The then-Governor, Mervyn King, described it as "a marvellous application of theoretical economics to a practical problem of vital importance".) He will also discuss further development of the latter auction using convex and "tropical" geometric methods.