Professor
National Technical Universtity of Athens
School of Electrical and Computing Engineering
Division of Communication, Electronic and Information Engineering
Zographou Campus
Iroon Polytechniou 9
15780 Athens, Greece
E-mail: afrati AT softlab. ece. ntua. gr
Phone: +30-210-7722498 (Office), Fax: +30-210-7722499
Education
Professional Appointments
Visiting Positions
Program Committee member
Organizing Committee member
Other Professional Activities
Projects funded by the European Union and International Organizations
Projects funded by the Greek General Secreteriat of Research and Technology
Graduated PhD students
Current PhD students
Alumni
My DBLP entry.
Conference and Journal Papers
Chapters in books
What is Data Mining, Applications, The Data-Mining Communities, Association-Rule Mining: Association Rules and Frequent Itemsets, MarketBasket Mining, The APriori Algorithm, PCY Algorithm, Low-Support/High Correlation: Min Hashing Algorithm, LSH Algorithm, kMin Hashing Algorithm, Hamming LSH Algorithm, Query Flocks: Query Flock Notation, Execution Strategies, Optimal Query Flock, Searching the Web: Page Rank, Problems With Real Web Graphs, Hubs and Authorities, Google Solution to Dead Ends and Spider Traps, Google AntiSpam Devices, Web Mining, The DICE Engine, Books and Authors, What is Pattern, Finding Data Occurrences Given Data,, Finding Data Occurrences Given Patterns, Clustering: Distance Measure, The Curse of Dimensionality, Approaches to Clustering, The k-Means Algorithm, The BFR Algorithm Fastmap in Clustering Algorithms, Hierarchical Clustering, The GRGPF Algorithm, CURE Algorithm, Matching Sequences: Fourier Transforms as Indexes for Sequences, Matching Queries to Sequences of the Same Length, Queries That are Shorter than the Sequences, Trails, Matching Queries of Arbitrary Length, Mining Event Sequences: Episode Mining, Monotonicity of Episodes and the APriori Algorithm, Checking Parallel Episodes, Checking Serial Episodes, Counting Composite Events.
Introduction to SQL. Relational Algebra. Introduction to Datalog, Stratified Negation, Stable and Well-Founded Models. Conjunctive queries with Negation and Arithmetic. Query Containment. Answering Queries using Views, the Bucket algorithm, the inverse rule algorithm. Data Dependencies, Normalization. Acyclic Hypergraphs, Computing Acyclic Joins. The Universal Relation. Introduction to Magic sets, Rule-goal trees, the magic-sets algorithm.
Online Homeworks: Gradiance