Archive for Oaxaca

off to Oaxaca! [workshop 18w5023]

Posted in Mountains, pictures, Statistics, Travel, University life with tags , , , , , , , , , on November 10, 2018 by xi'an

This morning I am off to Oaxaca, Mexico, for a week-long workshop which aims at bringing together a mixed audience of statisticians who are using and developing computational methods, researchers involved in computational statistical mechanics and its applications (e.g., materials science, biophysics), and applied mathematicians studying numerical methods used in the field of application from a mathematical viewpoint. As a co-organiser, with Gabriel Stolz and Luke Bornn, I hope that the workshop will truly see the start of a pragmatic cross-fertilization between fields through the exchange of ideas and methods such as research lectures, discussions, and practical sessions based on benchmark systems. This is also my first time at the Casa Matemática Oaxaca, as opposed to my several stays at BIRS, and I am quite excited to discover the place (although the workshop will take place in an hotel as the conference facilities are still under completion after that many years!) and the surroundings. (This is also my second visit to Mexico after the ISBA conference in Cancún in 2014.)

BIRS call for Oaxaca

Posted in Kids, Travel, University life with tags , , , , , , , on September 26, 2017 by xi'an

Here is a call for support from Nassim Goussoub, Scientific Director of BIRS:I would  like to call upon you to consider aiding the people of the State of Oaxaca. As you may know, through their support for BIRS-CMO, the people of Oaxaca have welcomed the World’s mathematical sciences community with open arms. With the plans to build a permanent facility under way, they are destined to be our hosts for years to come. I therefore ask you to contribute — if you can. Here are some of the foundations accepting donations.

  1. Francisco Toledo’s Foundation, IAGO (Instituto Artes Gráficas de Oaxaca)

  2. International Community Foundation(ICF)

  3. Global Giving

  4. Red Cross Mexico 6. Unicef Mexico

ABC’ory in Banff [17w5025]

Posted in Books, Mountains, pictures, Statistics, Travel, University life with tags , , , , , , , , , , , on February 27, 2017 by xi'an

And another exciting and animated [last] day of ABC’ory [and practice]!  Kyle Cranmer exposed a density ratio density estimation approach I had not seen before [and will comment here soon]. Patrick Muchmore talked about unbiased estimators of Gaussian and non-Gaussian densities in elliptically contoured distributions which allows for running pseudo-MCMC than ABC. This reminded me of using the same tool [for those distributions can be expressed as mixtures of normals] in my PhD thesis, if for completely different purposes. In his talk, including a presentation of an ABC blackbox platform called ELFI, Samuel Kaski did translate statistical inference as inverse reinforcement learning: I hope this does not catch! In the afternoon, Dennis Prangle gave us the intuition behind his rare event ABC, which is not estimating rare events by ABC but rather using rare event simulation to improve ABC. [A paper I will a.s. comment here soon as well!] And Scott Sisson concluded the day and the week with his views on ABC for high dimensions.

While being obviously biased as the organiser of the workshop, I nonetheless feel it was a wonderful meeting with just the right number of participants to induce interactions and discussions during and around the talk, as well as preserve some time for pairwise interactions. Like all other workshops I contributed to in BIRS along the years

07w5079 2007-07-01 Bioinformatics, Genetics and Stochastic Computation: Bridging the Gap
10w2170 2010-09-10 Hierarchical Bayesian Methods in Ecology
14w5125 2014-03-02 Advances in Scalable Bayesian Computation

this is certainly a highly profitable one! For a [major] change, the next one [18w5023] will take place in Oaxaca, Mexico, and will see computational statistics meet molecular simulation. [As an aside, here are the first and last slides of Ewan Cameron’s talk, appropriately illustrating beginning and end, for both themes of his talk: epidemiology and astronomy!]