Outline Introduction Distributed DBMS Architecture Distributed Database Design Distributed Query Processing Distributed Transaction Management Data Replication Consistency criteria Update propagation protocols Parallel Database Systems Data Integration Systems Web Search/Querying Peer-to-Peer Data Management Data Stream Management Distributed & Parallel DBMS M. Tamer Özsu Page 6.1 Acknowledgements Many of these slides are from notes prepared by Prof. Gustavo
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Is Wal-Mart Good for America? 1. The U.S. is in a shrinking economy. Many plants are closed and many people are unemployed. The big retailers change their suppliers from U.S. manufactures to the developing countries’ manufactures‚ which cost much less. The competition between the suppliers( manufactures) is more intensive. The supplier has less prower is retail business. The market is shift from supplier dependence to buyer dependence‚ which means the buyer/ retailer has more prower. They very know
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Data collection is any process of preparing and collecting data‚ for example‚ as part of a process improvement or similar project. The purpose of data collection is to obtain information to keep on record‚ to make decisions about important issues‚ or to pass information on to others. Data are primarily collected to provide information regarding a specific topic. Data collection usually takes place early on in an improvement project‚ and is often formalized through a data collection plan which often
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Nagham Hamid‚ Abid Yahya‚ R. Badlishah Ahmad & Osamah M. Al-Qershi Image Steganography Techniques: An Overview Nagham Hamid University Malaysia Perils (UniMAP) School of Communication and Computer Engineering Penang‚ Malaysia nagham_fawa@yahoo.com Abid Yahya University Malaysia Perlis (UniMAP) School of Communication and Computer Engineering Perlis‚ Malaysia R. Badlishah Ahmad University Malaysia Perlis (UniMAP) School of Communication and Computer Engineering Perlis‚ Malaysia
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1 Secondary data analysis: an introduction All data are the consequence of one person asking questions of someone else. (Jacob 1984: 43) This chapter introduces the field of secondary data analysis. It begins by considering what it is that we mean by secondary data analysis‚ before describing the type of data that might lend itself to secondary analysis and the ways in which the approach has developed as a research tool in social and educational research. The second part of the chapter considers
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What Is A Data Dictionary? Per the IBM Dictionary of Computing‚ a data dictionary is a "centralized repository of information about data such as meaning‚ relationships to other data‚ origin‚ usage‚ and format." Essentially‚ it is documentation or data about data in a file or database‚ also called metadata. Typical Items In A Data Dictionary For each field or column in a database table‚ describe the following elements: Item Contents File/Table Name The name of the file or table where
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LECTURE 1 DATA TYPES Our interactions (inputs and outputs) of a program are treated in many languages as a stream of bytes. These bytes represent data that can be interpreted as representing values that we understand. Additionally‚ within a program we process this data that can be interpreted as representing values that we understand. Additionally‚ within a program we process this data in various way such as adding them up or sorting them. This data comes in different forms. Examples include: your
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Data Models Consider a simple student registration. Specifically we want to support the tasks of students registering for or withdrawing from a class. To do this‚ the system will need to record data about what entities? What specific data about the entities will need to be stored? What is the cardinality between students and courses? Diagram the data model. While‚ considering a student class registration system for registering or withdrawing a system must have the capability to record data in
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Wal-Mart Stores: Every Day Low Prices in China Key Issues Wal-Mart is currently facing a change to their business in China. Over the past few years China’s retail industry and its distribution and logistical infrastructure have opened up significantly with decreased government regulation. For Wal-Mart this will mean a large change in its business strategy and it will now look to profitably expand with China’s booming economy. In order to set a new strategy Wal-Mart will need to identify
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Industry Analysis Example (Porter’s Five Forces and Complementors) Wal-Mart Potential Competitors: Medium pressure Grocers could potentially enter into the retail side. Entry barriers are relatively high‚ as Wal-Mart has an outstanding distribution systems‚ locations‚ brand name‚ and financial capital to fend off competitors. Wal-mart often has an absolute cost advantage over other competitors. Rivalry Among Established Companies: Medium Pressure Currently‚ there are three main incumbent
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