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1-overview - CS273 - Data and Knowledge Bases Xifeng Y Xif...

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CS273 - Data and Knowledge Bases Xifeng Yan Computer Science niversity of California at Santa Barbara University of California at Santa Barbara
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Department of Computer Science What are Data, Information and Knowledge? Data is unprocessed facts and figures without any added interpretation or analysis. "The price of crude oil is $80 per barrel." Information is data that has been interpreted so that it has eaning for the user. "The price of crude oil has risen from meaning for the user. The price of crude oil has risen from $70 to $80 per barrel" gives meaning to the data and so is said to be information to someone who tracks oil prices. nowledge a combination of information experience Knowledge is a combination of information, experience and insight that may benefit the individual or the organization. "When crude oil prices go up by $10 per barrel, it's likely that gas prices will rise by 20c per gallon" is knowledge. CS273: Data and Knowledge Bases | University of California at Santa Barbara 2
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Department of Computer Science The Overflow of Data We are overwhelmed, confused, and lost! CS273: Data and Knowledge Bases | University of California at Santa Barbara 3
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Department of Computer Science Database, Information Retrieval and Data Mining The Explosive Growth of Data: from terabytes to petabytes Data collection and data availability Automated data collection tools, database systems, Web, computerized society Major sources of abundant data Business: Web, e-commerce, transactions, stocks, … Science: Remote sensing, bioinformatics, scientific simulation, … Society and everyone: news, digital cameras, YouTube e are drowning in data but starving for knowledge! We are drowning in data, but starving for knowledge! lides by courtesy of J Han K Chang C Zhai CS273: Data and Knowledge Bases | University of California at Santa Barbara 4 slides by courtesy of J. Han, K. Chang, C. Zhai with modifications
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Department of Computer Science ORACLE, SAP, SYBASE, IBM/DB2 Why we have these companies? Data without organization is useless! Data without computing is useless! Why ORACLE et al. so successful? hree Pillars Three Pillars odel/Lang age + Comp ting + Data Model/Language + Computing + Data Game is Over? People did think so in 90’s CS273: Data and Knowledge Bases | University of California at Santa Barbara 5
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Google Implication Is Google an accidental event? Librarians have studied information search for decades Statisticians have formulated the concept of correlation and association one hundred years ago hy was Google built by computer scientists with Why was Google built by computer scientists with database and data mining background? Three Pillars
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1-overview - CS273 - Data and Knowledge Bases Xifeng Y Xif...

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