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Data Mining I
Summer semester 2019
Lecture 1: Introduction
Lectures: Prof. Dr. Eirini Ntoutsi
TAs: Tai Le Quy, VasileiosIosifidis, Maximilian Idahl, ShaheerAsghar, WazedAliInstitut für Verteilte Systeme
AG Intelligente Systeme -Data Mining group
About me
"03/2016 -presentAssociate Professor Faculty of Electrical Engineering & Computer Science Leibniz University HannoverL3S Research Center(since May 2016)
"02/2012 -02/2016Post-doctoral researcher & lecturerInstitute for Informatics,LMU Munich, Germany
"02/2010 -01/2012 Alexander von Humboldt postdoc fellowInstitute for Informatics, LMU Munich, Germany
"2009: Data Mining Expert National Hellenic Organization (OTE), Athens, Greece "04/2007 -02/2009Co-Founder and AI expertNeeMoStartup, Greece
"09/2003 -09/2008 PhD in Data MiningUniversity of Piraeus, Athens, Greece
"09/2001 -09/2003MSc, Computer Science/ Text MiningPolytechnic School, University of Patras, Greece
"09/1996 -09/2001 Diploma, Computer Engineering and Informatics/ AI GamesPolytechnic School, University of Patras, Greece
2Learning from streaming data
Current focus areas:
Data Stream Mining/ Adaptive Machine Learning
Responsible AI: Fairness-Aware Machine Learning
Outline
3Data Mining I @SS19: Introduction
Why to study Data Mining/Machine Learning -famous quotes*Microsoft)
Yahoo)
Microsoft)
4 *Source: Pedro Domingos http://courses.cs.washington.edu/courses/cse446/15sp/slides/intro.pdfData Mining I @SS19: Introduction
Disclaimer:I use theterms data miningandmachine learning (sometimes also Artificial Intelligence (AI) interchangeably here and through the lecture. We will discuss the similarities/differences later. In both cases, we talk to learning from data. Data Mining -Data Science -Big Data -Machine Learning -Deep Learning 5 ͞Big data is like teenage sedž͗ eǀeryone talks about it, nobody really knows how to do it, everyone thinks everyone else is doing it, so everyone claims they are doing it.͞Source: Dan Ariely, Duke University
Data Mining I @SS19: Introduction
6Source: Google trends, query on 9.4.2019
Data Mining I @SS19: Introduction
Why to study Data Mining -Data Scientist: The sexiest job of 21stcentury 7Source: Harvard Business Review. Data Scientist: The Sexiest Job of the 21st Century. October 2012 link
Data Mining I @SS19: Introduction
Source: https://www.slideshare.net/IBMBDA/myths-
A good conjuncture for ML/DM/DS (data-driven learning)8Data Mining I @SS19: Introduction
Data deluge
Machine Learning
advancesComputer power
Enthusiasm
World-wide competition on Artificial Intelligence (AI)Generation, 19/3/2019, Berlin
There are 3 fierce competitions
9Data Mining I @SS19: Introduction
Outline
11Data Mining I @SS19: Introduction
Why we need Data Mining
Telecommunication
Astronomy
BanksBiology
Internet
Supermarkets
12 IoTData Mining I @SS19: Introduction
Examples of data sources: The Internet
13Web 2.0: A world of opinions
User generated content
Data Mining I @SS19: Introduction
Source: http://www.internetlivestats.com/internet-users/Examples of data sources: Internet of things
software, sensors, and network connectivity, which enables these objects to collect and exchange data. Source: https://en.wikipedia.org/wiki/Internet_of_Things 14Image source:http://tinyurl.com/prtfqxf
Source: http://blogs.cisco.com/diversity/the-internet-of-things-infographic During 2008, the number of things connected to the These things are everything, smartphones, tablets,Data Mining I @SS19: Introduction
Examples of data sources: data intensive science
15 Slide from:http://research.microsoft.com/en-us/um/people/gray/talks/nrc-cstb_escience.ppt bepoweredbyadvancedcomputing capabilitiesthathelpresearchers manipulateandexploremassivedatasets." -The Fourth Paradigm -MicrosoftExamples of e-science applications:
Earth and environment
Health and wellbeing
E.g., The HumanGenome Project(HGP)
Citizen science
Scholarly communication
Basic science
E.g., CERN
Data Mining I @SS19: Introduction
Examples of data sources: Manufacturing
Source: https://www.technologyreview.com/s/609770/andrew-ng-says-factories-are-ais-next-frontier/ 16Image source: https://images.readwrite.com/wp-
Companies are making major investments in AI and
industrial analytics to help drive their digital transformationData Mining I @SS19: Introduction
Image source: https://cdn-sv1.deepsense.ai/wp-
manufacturing-1140x337.jpg lecture ї priǀacy aware data mining (https://eugdpr.org/)17Data Mining I @SS19: Introduction
From data to knowledge of different types
18Data Mining I @SS19: Introduction
DataMethodsKnowledge
Call records
Movie ratings
Telescope
imagesOutlier DetectionDetect fraud cases
Collaborative filteringRecommend movies to users
ClassificationIs it an "early», "intermediate» or "late formation» star? News articlesClusteringWhat are the topics people discuss about in the news today?Short break (5') -Get to know us better
19Data Mining I @SS19: Introduction
Outline
20Data Mining I @SS19: Introduction
What is KDD
Knowledge Discovery in Databases(KDD)is the nontrivial processof identifying valid, novel, potentially
useful, and ultimatelyunderstandablepatternsin data. [Fayyad, Piatetsky-Shapiro, and Smyth 1996]Remarks:
some post-processing21Data Mining I @SS19: Introduction
Clarification:The term databases does not refer exclusively to relational databases storing structured
The KDD process and the Data Mining step
22Patterns
Knowledge
[Fayyad, Piatetsky-Shapiro & Smyth, 1996]Transformed data
Target data
Preprocessed data
Selection:ͻSelect a relevant dataset or focus on a subset of a datasetͻFile / DB/Preprocessing/Cleaning:ͻIntegration of data from different data sourcesNoise removalMissing valuesTransformation:ͻSelect useful featuresͻFeature transformation/ discretizationͻDimensionality reductionData Mining:ͻSearch for patterns of interest Evaluation:ͻEvaluate patterns based on interestingness measuresͻStatistical validation of the ModelsͻVisualizationͻDescriptive Statistics
DataData Mining I @SS19: Introduction
A modern version: The Data Science process
23Data Mining I @SS19: Introduction
The interdisciplinary nature of KDD 1/2
24KDD