Profile

Cover photo
Mattias Villani
Works at Linköping University
Attended Stockholm University
Lived in Nyköping
1,288 followers|163,438 views
AboutPostsPhotos

Stream

 
This is a fantastic book for any Bayesian interested in learning about the interesting application area of computer vision. Highly recommended as it allows for rapid concise reading if you are already familiar with Bayesian methods. The book's website has lots of extra material and a free PDF for download.
5
3
Matthew Alp's profile photoleo wang's profile photo
Add a comment...

Mattias Villani

Shared publicly  - 
 
This weekend.
1
Add a comment...
 
Kicking a robot. A lot seems to be happening in the robotics field. Exciting times!
35
9
Tonnie K's profile photoPaul Chong's profile photoTim Winterfeld's profile photoPablo J. E. Rodriguez's profile photo
2 comments
 
Lookn good
Add a comment...
 
I found this t-shirt deep in my closet. These were handed out at my very first statistical conference back in 1998, the sixth of the legendary Valencia meetings on Bayesian Statistics. I was 24 years old and was not expecting to end up in a local nightclub to witness a striptease act by leading Bayesians, including Jim Berger whose textbook was my entry point to the subject. 
22
2
Rolando Gonzales's profile photoMattias Villani's profile photoCharles Filipponi's profile photoEnrique Cuervo Guzman's profile photo
2 comments
 
Yes, I haven't seen it either. It is a sign of the times that the winner is presented at NIPS. Bayes is everywhere these days. 
Add a comment...
 
Very nice summary of things that really mattered.
 
Our planet has existed for 4.5 billion years, and it has been a busy few eons. Here are the 25 biggest milestones in Earth's history. From leaps forward in evolution to devastating asteroid impacts, these were the turning points that shaped our world.

One thing stands out to me in all this: sex. That is, once sex was invented, just over one billion years ago, the planet goes wild, as the kind of mutations and effects of natural selection, given reproduction by sex, increased exponentially, and filled the planet was quite easily filled with diverse life. It was only the first couple of steps it that boring first billion years that had to take so long to develop. Then sex was the key: that got us to where we are today, and is why evolution fits the timescale of our planet so well. Sex allowed amazing amounts of divergence in very short time spans. Without sex we wouldn't be here. Sex is the key.

A rough timeline:
4.6 billion years ago The origin of the Earth
3.8 billion years ago First life arises
2.1 billion years ago Eukaryotes evolved
1.1 billion years ago First sexually reproducing organisms
570 million years ago First arthropods evolve
530 million years ago The first fish
475 million years ago First land plants
385 million years ago First forests
370 million years ago The first amphibians
320 million years ago The earliest reptiles
225 million years ago The dinosaurs evolve
200 million years ago The mammals evolve
150 million years ago First birds
130 million years ago Flowering plants evolve
100 million years ago The first bees evolve
65 million years ago Dinosaurs and ammonites become extinct
14 million years ago The first great apes appear
2.5 million years ago Genus Homo evolves
0.2 million years ago Our species, Homo sapiens evolves

Until recently (less than a century ago) we didn't know how old the Earth was, nor how old the universe was, nor that the Earth was about 1/3rd as old as the universe. While so much is still mystery, what we know with an extreme level of confidence is mind-boggling.

First, it took almost a billion years (0.8 billion) for the Earth to cool down and stabilize for life to even start to form. Then what took the longest via natural selection was to get from the first living organisms to Eukaryotes, or organisms whose cells contain a nucleus and other structures enclosed within membranes. That was the most difficult step by far, and took over 1/3rd of the entire age of the Earth.

The other hurdle was getting from Eukaryotes having evolved to sexually reproducing species. It took another entire billion years just for sex to be invented. But that's also a very reasonable time frame. Those two steps together, developing Eukaryotes and then developing Sexual Reproduction, plus almost a billion years at first when the Earth was formed and couldn't support life yet, compromise the first 3.5 billion years of the Earth's existence, up to about just one billion years ago. And then the planet turns green.

#scienceeveryday  
From leaps forward in evolution to devastating asteroid impacts, these were the turning points that shaped our world.
1 comment on original post
1
Add a comment...
 
As a half Napoletano and self-proclaimed Pizza connoisseur of the kosher type, here is a piece of research that I can related to.

From the abstract of the paper 'The “True” Neapolitan Pizza: Assessing the Influence of Extra Virgin Olive Oil on Pizza Volatile Compounds and Lipid Oxidation' I learn that:

"Some positive key odor compounds were found in pizza cooked with extra virgin olive oil, and the addition of tomato sauce and extra virgin olive oil caused a dramatic change in its volatile pattern."

Here is the paper (restricted access):
http://www.tandfonline.com/doi/abs/10.1080/15428052.2014.952476#.VLQ0NGTF82I
4
Tom Ligman's profile photoMattias Villani's profile phototallat hussain's profile photo
3 comments
 
yemyyyyyyyyyyyyyyyyyyy
Add a comment...
In his circles
2,701 people
Have him in circles
1,288 people
Leon Wessels's profile photo
ทรงศักดิ์ พิพัฒน์'s profile photo
Robert Sørensen's profile photo
John Bankston's profile photo
Randy Anzalone's profile photo
brian silva's profile photo
Mrs Xoke's profile photo
Mike Hale's profile photo
Ole Albers's profile photo

Mattias Villani

Shared publicly  - 
 
LyX developers, please keep backward compatibility at least between two versions within the same major release. So tired of ' ... is from a newer version of LyX and the lyx2lyx script failed to convert it.'
3
David Crosswell's profile photoMattias Villani's profile photo
2 comments
 
I have used LaTeX before, but I feel that I am more productive in LyX. I also like the TrackChanges feature which is excellent for collaboration. But yes, the hassle with version incompatibility in LyX may force me back.
Add a comment...

Mattias Villani
owner

Computations  - 
 
Gibbs sampling on the Raspberry Pi 2. Thanks to +Anders Eklund  for sharing.
3
1
Jeramy Brian's profile photo
Add a comment...

Mattias Villani

Shared publicly  - 
 
Is this really real? Amazing.
1
Adrian Chapmanlaw's profile photoPatrik Järvelöv's profile photoYun Luo's profile photoChris Harpner's profile photo
6 comments
 
It all makes sense now!
Add a comment...

Mattias Villani

Shared publicly  - 
 
While visiting the Federal Reserved Bank of Atlanta to give a research seminar, I was suggested to visit Coca-Cola. I chose instead to spend my free time at the Martin Luther King Jr Historic Site.
 
The faces of those who came to hear Martin Luther King Jr. speak.
Who were the people standing beside Dr. Martin Luther King, Jr.? These photos capture a nation inspired by his powerful dream.
1 comment on original post
3
Add a comment...

Mattias Villani

Shared publicly  - 
 
Coursera is really bringing it. Amazing how many MOOCs there are out there. 
Digital Signal Processing is a free online class taught by Paolo Prandoni & Martin Vetterli of École Polytechnique Fédérale de Lausanne
1
Add a comment...
People
In his circles
2,701 people
Have him in circles
1,288 people
Leon Wessels's profile photo
ทรงศักดิ์ พิพัฒน์'s profile photo
Robert Sørensen's profile photo
John Bankston's profile photo
Randy Anzalone's profile photo
brian silva's profile photo
Mrs Xoke's profile photo
Mike Hale's profile photo
Ole Albers's profile photo
Education
  • Stockholm University
    Statistics, 1996 - 2000
    PhD studies
Basic Information
Gender
Male
Story
Tagline
Natural Born Bayesian
Introduction
I am Professor of Statistics at the Division of Statistics, Department of Computer and Information Science at Linköping University in Sweden.
Bragging rights
Two kids, only one wife.
Work
Occupation
Professor of Statistics
Skills
Bayesian Statistics, Programming, Statistical Modeling, Prediction.
Employment
  • Linköping University
    Professor, 2011 - present
  • Sveriges Riksbank
    Researcher, 2003 - 2011
  • Stockholm University
    Lektor, 2002 - 2011
Places
Map of the places this user has livedMap of the places this user has livedMap of the places this user has lived
Previously
Nyköping