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13 Mar 2008 at 5:13am ![]() 55 min - Mar 13, 2008 Google Tech Talks March, 3 2008 ABSTRACT Introduction Project mission statement, history, internal organization, partners, CGAL in numbers. What's in CGAL A survey on available data structures and algorithms, as well as examples how and by whom they are used. Topics include Triangulations, Voronoi diagrams, Boolean operations on polygons and polyhedra, arrangements of curves and their applications, Mesh generation, Geometry processing, Alpha shapes, Convex hull algorithms, Operations on polygons, Search structures, Interpolation, Shape analysis, fitting, and distances, Kinetic data structures... Generic Programming Paradigm CGAL data structures are C++ template classes and functions, usually taking several template parameters (with default values for ease of use). This gives developers an incredible flexibility to adapt the data structures to their needs, which is important internally for code reuse, and important for end users, as they typically integrate CGAL in already existing applications. Parts of CGAL are also interfaced with languages and software like Python, Java, Scilab, Qt and the Ipe drawing editor. Exact Geometric Computing Paradigm We present how to make geometric algorithms correct, robust, and nevertheless fast, by combining floating point arithmetic with exact arithmetic, and clever filtering mechanisms to switch between these two modes. These mechanisms can be used for geometric predicates, as well as for geometric constructions, which instead of a discrete return value generate new geometric entities. Conclusion and Outlook A wrapup, and a sneak preview on algorithms that might make it into future releases of CGAL. Speaker: Andreas Fabri, PhD, GeometryFactory As member of the initial development team of the CGAL project, Andreas is one of the architects of the CGAL software. For several years he chaired the CGAL Editorial Board. In 2003, Andreas founded the GeometryFactory as spin-off of the CGAL project, offering licenses, service and support to commercial users. Andreas received his PhD in 1994 from the Ecole des Mines de Paris, while working on geometric algorithms for parallel machines at INRIA. Speaker: Sylvain Pion, PhD, INRIA Sophia-Antipolis Sylvain got involved in the CGAL project during his PhD, which he received in 1999 at INRIA. He worked then on providing generic solutions to numerical robustness issues arising in geometric algorithms. Later on he worked on the efficiency of some fundamental geometric algorithms such as 3D Delaunay triangulations. He is now also involved in C++ standardization, and is working on parallel geometric algorithms. He is employed as researcher at INRIA, and is the current chair of the CGAL Editorial Board. 1 Apr 2008 at 3:00am 40 min - Apr 1, 2008 Algorithms 1. Algorithms -- overview 24 Jan 2008 at 5:06am ![]() 55 min - Jan 24, 2008 Google Tech Talks January, 23 2008 ABSTRACT I will describe some algorithms for addressing some fundamental optimization problems that arise in the context of data storage and management. In the first part of the talk we will address the following question: How should we store data in order to effectively cope with non-uniform demand for data? How many copies of popular data objects do we need? Where should we store them for effective load balancing? In the second part of the talk we will address the issue of moving data objects quickly, to react to changing demand patterns. We will develop approximation algorithms for these problems. The first part of the talk is joint work with Golubchik, Khanna,Thurimella and Zhu. The second part is joint work with Kim and Wan. Speaker: Samir Khuller Samir Khuller received his M.S and Ph.D from Cornell University in 1989 and 1990, respectively. He spent 2 years as a Research Associate at the Institute for Advanced Computer Studies at the University of Maryland, before joining the Computer Science Department in 1992, where he is a Professor and Associate Chair in the Department of Computer Science. His research interests are in graph algorithms, discrete optimization, and computational geometry. He has published about 130 journal and conference papers, and several book chapters on these topics. He received the National Science Foundation's Career Development Award, the Dean's Teaching Excellence Award and also a CTE-Lilly Teaching Fellowship. In 2003, he and his students were awarded the "Best newcomer paper" award for the ACM PODS Conference. He received the University of Maryland's Distinguished Scholar Teacher Award in 2007. 28 Aug 2007 at 12:40pm ![]() 33 min - Aug 28, 2007 Lecture 5: Parallel Graph Algorithms with MapReduce. See http://code.google.com/edu/content/submissions/mapreduce-minilecture/listing.html for slides and other resources. 8 min Potential questions and answers for my diploma thesis presentation about model checking of randomized leader election algorithms. Abstract This thesis deals with randomized leader election algorithms for anonymous, unidirectional rings as a case study for looking into the state space explosion problem of model checking. Six algorithms are investigated and model checked using the tools PRISM and SPIN. Various statistics and improvements of the model checking procedure are regarded. 29 Apr 2007 at 8:00pm 2 min - Apr 30, 2007 With AI Techniques for Game Programming Mat Buckland takes two incredibly complex topics and makes them easy to understand, even without a significant mathematical background. 3 min BG Hip-Hop clip 8 Jun 2008 at 1:24am 8 min - Jun 8, 2008 This is a basic tutorial on using the Cube Explorer computer software to create your own custom algorithms for different 3x3 Rubik's Cube patterns. And just when you thought the Rubik's Cube couldn't get any more fun! Note: In order to grey-out a cube square and make it undefined, you right-click. It's done several times in the video, but is not talked about. Remember, you have to leave one piece, for example, both sides of the white/red edge piece, greyed out in order to get the multiple algorithm window when solving. If the cube is fully defined (no grey), then you will only get one algorithm in the main window. Also watch more games how to videos including tips, tricks, advice, and directons on puzzles for free. 27 Mar 2008 at 3:00am 1 hr 32 min - Mar 27, 2008 Algorithms 6. Graph Algorithms I - Topological Sorting, Prim's Algorithm 30 Oct 2007 at 8:10pm 51 sec - Oct 31, 2007 Learn tips on what algorithms are when associated with a Rubiks cube and why they are important to solving it in this free video clip on how to solve a Rubiks cube. 28 Aug 2007 at 12:30pm ![]() 24 min - Aug 28, 2007 Lecture 4: Clustering Algorithms with MapReduce. See http://code.google.com/edu/content/submissions/mapreduce-minilecture/listing.htmlfor slides and other resources. 2 min Oct 16 2006 9:56A PORTAL RECORDS Add to My Profile | More Videos 11 Oct 2005 at 8:00pm 1 hr 18 min - Oct 12, 2005 TOM LEIGHTON co-founded Akamai Technologies in September 1998. Serving as Chief Scientist, Dr. Leighton is Akamai's technology visionary as well as a key member of the Executive Committee setting the company's direction. As one of the world's preeminent authorities on algorithms for network applications, Dr. Leighton's work behind establishing Akamai was based on recognizing that a solution to freeing up Web congestion could be found in applied mathematics and algorithms. Akamai has demonstrated this through the creation of the world's largest distributed computing platform that dynamically routes content and applications across a network of over 15,000 servers. Dr. Leighton's technology achievements at Akamai earned him recognition as one of the Top 10 Technology Innovators in U.S. News & World Report. A Professor of Applied Mathematics at MIT, he has served as the Head of the Algorithms Group in MIT's Laboratory for Computer Science since its inception in 1996. Tags: Northeastern University, CCIS, ACM, nuACM 23 May 2007 at 8:00pm 1 min - May 24, 2007 review of the book Introduction to Algorithms by CLRS 18 Jun 2008 at 10:56am 6 min - Jun 18, 2008 Just don't understand those algorithms for your Rubik's Cube? Having trouble using them to solve it? Well, look no further, because this two-part video shows you how to use them to quickly solve the Cube! List of algorithms: (Video 1) edge permute: F F edge flip: Fi U Li Ui corner permute/orient: Ri Di R D (Video 2) edge right: U R Ui Ri Ui Fi U F edge left: Ui Li U L U F Ui Fi L line/dot: F R U Ri Ui Fi edge permute: R U Ri U R U U Ri (U) corner permute: U R Ui Li U Ri Ui L corner orient: Ri Di R D. Also watch more games how to videos including tips, tricks, advice, and directons on puzzles for free. 19 Aug 2007 at 3:55am 26 sec - Aug 19, 2007 Only final positions of the cube are given. 4L4C group moving to the right; generate by 11 Jan 2008 at 7:00pm 1 hr 21 min - Jan 12, 2008 ??????????????????????????????????????????????????< Sponsored Links
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