UseR!-2012 buzz

It has been a WHILE since the last time I wrote an entry here. Nonetheless, I'm approaching to le Grande Finale of my doctorating, and this is awesome.

Finally, I have decided to go to the UseR!-2012 conference which will be hosted by Vanderbilt University of Nashville, Tennessee, on June, 12-15, 2012. I must admit that I've been dreaming to attend the conference for three years in a row, but I've never made this happen. This year, I won't let myself miss the event. Also, as still being a grad student, I can get registered for a very low fee (no, my University does not pay for that). So, I've decided to go, and I am willing to give a lighting talk about my research.

Two things to figure out till February, 29*:

• format of the abstract
• what to give the lighting talk about

*this is when the Early Bird registration ends

There are too many things I would like to tell the world about... I must make my choice and make the presentation really short and sweet. I hope I will find the right topic eventually within the next week or so.

In the meantime, I have come across a lovely R-user group in Barcelona. I am attending the meeting of the group on February, 8, and I must notice that it will be held in one of the most amazing Barceloan's buildings, Parc de Recerca Biomèdica. Can't wait! :-)

Confessions of a Philosophiae-Doctor-to-be

I have not written to this blog since May, and the hiatus has been caused by the enormous amount of work I've got dealing with my PhD thesis. Or, being more accurate in words, the stress caused by the writing of my dissertation has hampered me from posting here. I have read a gazillion web articles and related literature (like, you know, books) speaking about how to deal with stress and stay positive. My ill attitude to dissertating has made me nervous and whiny, and, yes, you'd rather not ask me how my thesis's going, unless you're my supervisor. A common mistake my Mom always does. She sort of cares, I know, I know.

I like thinking that I'm not alone who's struggling against routine writing willing to come up with a beautiful and well-made piece of artistry aka la Thèse de Doctorat. It is supposed to boost my stocks on the job market, bring me scientific recognition, and - with some luck - make my mother admit that, yes, I can get my stuff done. Also, when booking Ryanair flights I will be able to choose a "Dr" prefix to my name. Isn't it cool to hold in your hand a boarding pass stating that it belongs to Dr. Chica Guapa ("Beautiful Chic", Spanish)?

Anyway, there are a lot of reasons out there why do we want to be (called) doctors. My grandest discovery and deception is that your optimism hits the zero point right when you are so close to the ending. That is, when you are already in the middle of writing the manuscript which is your thesis-to-be and which is narrating about all the important stuff you have discovered. The research is over, and this is the fun part, and now you have to everyday confront the rigorous reality of LaTeX formatting, proper abbreviating in your citations and arguing with your scientific advisor if you should include more sources into the bibliographical review. On the background, you also start doubting whether all of this that you've been writing has any sense at all. You wonder if anyone will ever read your work, and, in an improbable case of the occasion, will they find it boring, absurd etc. etc.

When I had just started my PhD, I was thinking that it is all about doing a fancy research, go abroad for nice whisky tasting conferences, hanging out with handsome AND smart men and choosing a proper dress for the defense of the thesis. Well, it turns out to be not exactly like this.

I don't know what I will do for living when I graduate. However, I am convinced that I will write a book, an article or at least another entry to this blog about what's really happening after you get enrolled to a PhD program. Not that is is a hell on Earth, but you'd rather be an optimist and know what you are really up to.

As a responsible Muscovite :: A clean-up for Moscow’s air

Air pollution is a major problem of the Moscow city. In the last years, people have been constantly rising concerns on the topic: the smoke above the head is visible to a naked eye, and the air doesn't feel like 'fresh' when inhaling. But after the incandescent summer of 2010, when huge concentrations of toxic substances have been thrown into the atmosphere, the uneven complaints ofthe muscovutes have become clear and loud. The air is dirty, and it is obviously unhealthy.

The popular folk joke "I see what I breathe" no longer entertains the inhabitants of Moscow. Something must be done to protect the lungs and, generally, well-being of people from air pollution. However, prior to taking any measures one should study out what is actually happening in the air, and how it is interfering with health.

Scientific studies of the last decade have established the relationship between air pollution and illnesses, and it is shown that both short-term and chronic exposure to contaminants cause acute health effects. Under “effects” we understand morbidity and mortality, and the outcomes are mostly respiratory and cardiovascular diseases. Above those, there is a relationship between long-term exposure to pollution and brain activity. As well, pollutants are known to cathalyse allergies, as impairing the condition of those persons who suffer from them.

Traffic, that in Moscow is severe, is a number one source of such contaminants. Scientists all over the world are involved in assessment of traffic-related air pollution. At the present moment, nearly 4 million cars circulate in the city, and the Moscow region appends some 3 million to this amount.

The most widespread pollutants are: fine particles also referred to as partictulate matter, ground-level ozone, nitrogen oxides, carbon monoxide and sulfur dioxide. The WHO in its 2005 Air Quality Guidelines sets up the limit values for the concentrations of those pollutants, while the US’s EPA in its National Ambient Air Quality Standards also considers lead. Of those pollutants, particulate matter provoke major anxiety, because it affects people at most. It is represented by tiny particles of solid and liquid substances that are suspended in the atmosphere. Particulates are classified by size i.e. aerodynamic radius, and the smaller they are the most dangerous they get, because once inhaled they subside in the lungs and may interfere with their function. Long-term exposure to particulate matter may provoke a number of cardiovasular and respiratory diseases, and it could even be associated with lung cancer. The resting pollutants are less widespread but nonetheless they affect lungs, heart and brain, and in high concentrations might be deathful.

What could be done for reducing the burden of traffic-related air pollution? The first evident solution that comes into one's mind is: give up on cars! However, it is a totally unprobabilistic measure, especially taking into consideration Moscow's huge distances and the cold weather in winter. Moreover, the effete muscovites won’t trade their comfy cars for a dewy jogging at a chilly day.

Instead, they could opt for electric vehicles. Unlike those with the combustion engine, electric cars do not emit pollutants into the atmosphere, and they could save a penny to their owners considering the permanently increasing oil prices. The only drawback of this solution is that the global infrastructure in its current state does not provide enough charging stations for electric cars. However, according to recent news, Moscow’s energy provider JSC “MOESK” will take care of installing those stations in the city.

Another feasible solution is to use public transport when it could be used. Here the city’s govermnent should step towards the needs of its inhabitants, as increasing the quality and diverisity of means of transport. For instance, common diesel buses could be replaced by hydrogen “zero-emitting” ones, at least, partially - as done by the Transport of London.

At last, muscovites could follow the lead of their European fellows by biking instead of driving. This is not only healthier as being a fitness activity, but also a bike does not emit pollutants, and the cost of manteinance is really low. The disadvantage of biking in Moscow is that due to the climate conditions, it is pertinent for about six months when the weather is relatively warm. There exist some enthusiasts of “snow biking” i.e. riding in winter time, but this option is not sutable for all, and more, it might be traumatic. However, a random car owner could reduce the emissions of their vehicle by up to a half as switching to bike for the “suitable” six months. Not too bad.

Thanks for all of you who've kept heading till here. Do you have any suggestions on the topic?

P. S. There has been a while since the last entry here. The reason for that hiatus is that I have been busy figuring out what my research is actually about. Now, when the things are clearer than ever, I am happy to share some random knowledge I obtain. At least with myself - not to forget things. :-)

R on the iPad: what we've got so far

I have just received an iPad as a Christmas present from my beloved husband. And there is a question I have already raised concerns about, that is the compatibility of R with the iOS devices. It is proven that R language is successfully compiled by the iPhone development tools, unfortunately, according to the Apple's Terms of Service, no GPL software can be acquired through the App Store. Hereby, either we have to wait till Apple modifies its TOS, or - jailbreak our iPad/iPhone. Then there is a completely described procedure of installing R on the iOS (jailbroken) devices.

Meanwhile, a web interface for R can be used since the access to internet is available: the RWeb compiles the R code once entered in a text box and returns the output on an html-page. Although the process goes a little slow, we cannot but consider the fact the plotting options are also available (as well as the year of creation of the service: 1998!)

As for Apple App Store, the only "R application" available by now is the R-Chart, the news service of the R language programming community.

However, we hope Apple would reconsider its decision over the R client for its iOS devices - due to the high and spreading demand both on R and mobility.

I personally would be very glad to receive any comments, corrections, news, updates, and hints. Happy holidays everyone!

"Oh, no!", a hint and a quiery

Remember the superbook on Spatial Statistics? The guy who wrote it (co-), gave a talk in the Universitat Politécnica de Catalunya last Friday. And... your obedient servant was late there while drying here hair at home and looking for a parking spot. NB: Be punctual!

Then, I have a funky dataset of 400 obs and trying to make it more...er... vivid! The point is that I have a Mac, and my only spreadsheet application is the "Numbers" from the iWork package. As far as I know it, it saves data only in its internal format that has a ".numbers" what-a-large extension, or in ".xls". Forget the ".csv"s, ".dbf"s and all extensions you are used to. The data we don't compile, however (God bless the databases administrators!), we receive it as it is. And, if your ".csv"-data is er... laconic you could make it more vivid by making some data mining on your own and adding what you found to your set. For doing that with Mac you have to be able to open your ".csv" as a spreadsheet. You could do that using "Google Docs" by uploading the data, editing it online, and then downloading the vivid dataset as what you want. But you fully depend on your internet connection and the size of your set. Another option is that you use the R command write, save the data as an ".xls"-file, edit it in your "Numbers", then save the result as an ".xls" and read it to R as a new object. Or, if the data is big, you can download one variable, add the data to it in the corresponding order (so you don't have to further sort) and then, read the result to R and merge the two datasets by a key.

Do you have your less lamer tricks to add data to the existing dataset in R? Directly?

Thanks, and don't miss interesting talks!

Lost, lost, lost!

I haven't written for a while, because my self-organising module was on vacation, i.e. out of order.

Now in September we are all seriously back to work (in Spain it is even called "Operación Setiembre", no translation needed). I have entered in a new field of research, and it is oh-so-spatial, and as far as I barely have any clue of how the spatial data is treated, I stick to a perfect-perfect-perfect book:



Here you can read it online. I have a hard copy from the University's Lib, he-he.

But my problems start when it comes to practice. As I try to install required packages to train new methods, my fancy R editor for Mac OS just hangs!!! Might be, this is due to slow internet connection at the lab, but hardly.

I need a fancier R editor for Mac OS! Any suggestions?

Use R! 2010 conference starts today

I think you understand the message I try to bring home to you through this image. Though this year the majority of R users is not presented at the conference, it's a nice challenge for the upcoming paper to do some nice research with/on R, write some nice paper about it, and participate in the conference. See you there next year!

And by now all we can and should do is track this conference via internet:

user2010.org

A following strongly readable blog entry talks about the statistics of the conference through the last years, with a code provided for one to program/plot it all by oneself:

R-Chart: Analyze Online R User Conference Data