A Marie Sklodowska-Curie ITN funded by the Horizon2020 program of the European Commission


Greg Kotkowski

My name is Grzegorz Kotkowski but for simplicity I let the foreigners call me Greg. Currently I am a PhD student at the Department of Statistical Science in Padova, Italy. I am a member of the AMVA4NewPhysics network. Among my main interests is data mining and statistical analysis, however I’m also passionate about Physics. Therefore I think I am at the best possible place.

Fashionable researcher

by Greg Kotkowski

Usually, fashion and science are like the opposite sides of a magnet – if one is important then the other is left behind. Let us add up the odds and take some thoughts about the aspects of a PhD student’s physical appearance. It is quite peculiar that I mention this subject, because I don’t care much about my look. Specifically, let me mention hairdressing. Not the last trends, as I know absolutely nothing about the subject, but rather the problem of getting a haircut abroad. Continue reading “Fashionable researcher”

Having a taste of business

by Greg Kotkowski

I have spent the last three months in the SDG company in Milan for my private sector secondment, which is a part of my contract. During this time I was able to have a closer look at how it is to work in a consulting company and to put my hands on real business problems. Herein, I want to summarise some of my experiences and deliberate on the R language – an inseparable friend of statisticians. Continue reading “Having a taste of business”

Multidimensional Scaling of National Holidays

by Greg Kotkowski

Living abroad brings a lot of experience and surprises. One of them is to enjoy countries’ diversity and customs for particular holidays that are not celebrated in the homeland. The other thing is when you discover on your calendar a vacation day due to some national event about which you had no idea. Another time, national vacations could bring troubles when it comes to cooperation between nodes in different countries. Continue reading “Multidimensional Scaling of National Holidays”

Summarising blog content

by Greg Kotkowski

A year ago I posted an article that visualised with word clouds subjects touched by the authors of this blog. The clouds contained stemmed and filtered nouns and verbs used in posts for each author that had produced at least 3 articles. Giles had suggested to take up the argument again the following year for a comparison, so here it is. Continue reading “Summarising blog content”

Astro@stats Workshop

by Greg Kotkowski

On Friday, September 8 th I attended a Sino-Italian workshop on astrostatistics organized at the Department of Statistical Sciences in Padova. It touched current topics at the interface between Astronomy, Physics and Statistics. At a first glance, I was surprised by the similarity of the research topics that are faced across different fields of science. Often the main difference lays only in the data and the assumptions of the underlying data generating process. Continue reading “Astro@stats Workshop”

Home birth

by Greg Kotkowski

Two weeks ago I was honoured to become a father for the second time. My wife happily gave birth to our first son. I was deeply moved by this emotional moment. For a long time to come I’ll have memories of my wife relaxing with a newborn in a swimming pool in the middle of our living room. Continue reading “Home birth”

Farewell Clermont-Ferrand

by Greg Kotkowski

Tight cooperation between nodes of the AMVA4NewPhysics network is an important aspect of our work. The members of the network (especially Early Stage Researchers) are encouraged to travel between the institutions. For this reason, I’ve spent the last 5 weeks in Clermont-Ferrand (France) at the Blaise Pascal University, where I’ve worked with another ESR, Fabricio, on an algorithm for the General Search of New Physics. Continue reading “Farewell Clermont-Ferrand”

My impressions on the RooStats Tutorial

by Greg Kotkowski

On the 19th of May I was very glad to take part in the RooStats tutorial organised by the AMVA4NewPhysics Network as a part of a workshop in Oviedo. RooStats is a ROOT library that uses the “RooFit” package, and provides classes to perform statistical analysis. The tutorial was attended by all the ESR from our Network, among which I was the only non-physicist. I am a statistician who does not use ROOT at all. For this reason, my attendance at the tutorial could seem Continue reading “My impressions on the RooStats Tutorial”

Analysis of Italian Roads

by Greg Kotkowski

It is said that “all roads lead to Rome”. Is it true anymore? Certainly, during the Roman Empire main roads were constructed in such the way that everybody could easily reach the capital, the political and economical center of the country. Therefore if roads are built in order to facilitate the transportation toward the most important hubs, they could be used as an indicator of a region’s importance.

I downloaded the data of all contemporary roads in Italy from the OSM. As a starter, it is worth to plot them all (see Figure 1). It is Continue reading “Analysis of Italian Roads”

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