Open course ware

well good morning everyone my name is Steve Carson and I'm the president of the open cor sare Consortium it's my pleasure oh thank you it's my pleasure on behalf of the board of the Consortium the staff and the membership to welcome everyone here to Cambridge Massachusetts for the 2011 Global open courseware Consortium meeting I'd like to thank our host institutions MIT in UMass Boston and especially the staff from those institutions who' served on the conference committee for their efforts in making this day possible and I'd especially like to thank Brandon mamatsu for his efforts he's the co-chair with me on the conference committee and he's worked very hard in the last couple of months to make this conference a success and I'd finally like to thank our sponsor next uh credit college credit advisor Services uh there's a table out back you can learn more about what they have to offer this event is a pleasure for me in two ways firs...

Hi everyone In this video, we will be talking about two topics of 3D chapter for mathematics of JEE preparation. The topics are: doing problems on finding perpendicular distance of a point from line and we will be finding equations of a line perpendicular to two lines given. These are small topics but as in other maths topics, you should learn the approach to solve problems like these. Let us start by finding perpendicular distance of a point from a line. We have a line given. Let us saw we have point A, and that is a_vector, and we have been given b_vector, which is the parallel vector. And we have been given a point P. Let us call it p_vector. And we have been asked to find the perpendicular distance of the point from the line. You may recall these kind of problems in 2D in straight lines. But now its 3D or 3-Dimensinal Geometry. So how will we solve this problem? One of the approaches to start this to think that there is a point C here, let us call it c_vector. And the...

[MUSIC PLAYING] PROFESSOR: Hello everyone, today we're going to learn how a Solar Cell is able to turn light generated mobile charges into electricity. Today's lesson will use everything we've learned in the past videos to understand this effect. So, make sure you understand the material from the previous videos before watching. First, let's go over the structure of a Solar Cell. Here's a cell that I made. And we can see that a metal ribbon is connected to the top metal contacts, which form a grid. The spaces between the grid lines allow light to enter the cell. If we flip over the cell we see the entire back surface is coated with metal, which allows easy extraction of charge from the back surface. Additionally, we have another metal ribbon that's connected to the backside. Now, let's hook up our Solar Cell to an ammeter to measure the current. So, here we have an ammeter connected to our Solar Cell and our light source which will simulate the...

ALEXIS GERVAIX: Hello everyone, and welcome to this little video presenting you my project on Mathematica. My name is Alex. And I'm currently studying material science in EPFL in Switzerland. And we had this personal challenge to do something you wanted with Mathematica. So I took an interest into crystallography, because this is a quite essential field of material science. Well, actually, it was on the request of my girlfriend, who has quite trouble to see things in 3D that I did this. And my idea was to create a tool that could be used by anyone that doesn't especially know about Mathematica, and that, without coding anything, he could create a couple of structures, have a look at the-- have an interactive part with it, and choose the atom, et cetera, and visualize more easily these structures. So let's have a look first at a bit of theory, and first with the Bravais lattice. So Bravais lattice is one of the fundamentals of crystallography. It defines the di...

Hello everyone, let me introduce myself. My name is Damien Scalia, I am a professor at the Université Libre de Bruxelles, I specialize in international criminal law and international crimes. I would first like to thank Amah and Lilianne, who kindly invited me to participate in your seminar. Today we are going to make a rather theoretical and short presentation of the issues at stake in this matter mainly concerning... This is why I was called or why I was invited here: it is mainly concerning the crimes of the French army or the crimes France committed in Algeria. We notice that these crimes are of two kinds. First, war crimes or war crimes against humanity, we will see them, since the designation is important, committed before the decolonization, before 1962. And also crimes committed after 1962, since we are also going to look today at the French nuclear tests committed in the Sahara which started before 1962, but ended after 1962. I will come back to this in a few mom...