 So Yelena has prepared this brief presentation for us. Hello everyone. I'm very sorry I couldn't be there in person during Open Access Week, but this is the next best thing I guess. I would say as teachers we naturally tend towards open access just because we want to share our knowledge. In my personal work I think I sort of consider access along two lines. One is through releasing my work as freely as possible and the second one is through the efforts of reproducible research. I'll tell you a little bit about both of those. So the goal is really to teach as many people as possible to share ideas. Perhaps this is idealistic, but it's something that feels worthwhile to many of us. So the standard thing we do, what most of us do is really to share our papers and work on our personal websites and even there has been some effort over the past few years even with journals that are for profit that will allow researchers to post their versions of the published work on their personal websites. Code and so on. I have also done a number of wall from demonstrations. These are mathematical interactive demonstrations that you publish through wall from. You can download their free CDF player, a computable document format player. And these are great for illustrating various concepts in the things you teach. And I think perhaps the most important one for me is my work on textbooks. So I have one published textbook in 1995 with Prentiss Hall and then the second one that's coming out this fall with Cambridge University Press and the third one that's coming also with Cambridge University Press next year. So with the one from 1995, my co-author and I at some point bought the copyright back. We have been sort of releasing ERATA for this book for many years and then at some point it felt like it would be really nice if we could manage the book. We were not in it for money, so we might as well sort of release it to the world. So we bought the copyright book back and we have put the book for free open access. It just has a sort of a standard creating commons protection on our website, on the book website. And so this way we are really able to update it with any bugs or typos and so on that comes along. I have also then decided to publish the book through CreateSpace. I don't know if you're aware of it and it's linked with Amazon so then you can publish it on CreateSpace and on Amazon. It's done at expense, so basically I don't get any money from it except from rounding cents and so on. But what this allows people to buy a bound copy of the book with a nice cover for basically the price of printing the book. I think I forget I had to set the prices differently for the US market and for the UK market and I believe it's $13 and that's, you know, 500 page book. Besides this experience and sort of informed by this experience when we went for the new contract with Cambridge University Press first of all we signed the contract very late. And why we're doing this because these two books, the current one to the next year have been in the works for the past 10 years and we have been updating them and sort of working on them for a long time and we have been actually releasing for free almost every six months sort of releases of these books. For instructors, if anybody would contact us and tell us, look, I'm teaching this and we have some sort of reasonable proof that this person is an instructor we would release also a full set of solutions and any other teaching material we have. So we have made a deal actually with Cambridge University Press that even once published the books will be available for free on our website and accept that these books will not have a PDF hyperlink and they will not have exercises but this is still some 800 plus page text. So apart from these two little sort of restrictions that makes it a little harder to navigate through the book it's still an open access book and available for free. So I think that's very important to us because we want this to be widespread. The second sort of line of open access has been through my efforts in the society and sort of in my community along the lines of what we call reproducible research. The idea being that the scientific product is not only the paper that goes out and gets published but all the data, the code, the specific block diagrams, parameters, schemes whatever else is needed to reproduce this work exactly. And so here at CMU for example my students are required every time they submit a journal paper to create this reproducible research page which is then released to the world sort of if the paper, even when the paper gets published. And journal paper we wrote on reproducible research with Patrick Vandeval and Martin Vetterlis was one of the top downloads on IEEE Explorer clearly showing that people have a huge interest in these types of ideas. So again I am very sorry I could not be there in person so I cannot answer questions live but I will be happy to answer any via email or if you want to meet my email is Jelena K that's J-E-L-E-N-A-K and CMU.edu. Thank you.