network‚ they must be modeled. Models are created to visually represent the proposed network so that business requirements can easily be associated with network objects to ensure that all requirements have been completely and accurately gathered. Basically data modeling can fall into two types of categories: Physical modeling and Logical modeling. Logical modeling deals with gathering business requirements and converting those requirements into a model. The logical model revolves around the needs
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The Open Systems Interconnection (OSI) model (ISO/IEC 7498-1) is a conceptual model that characterizes and standardizes the internal functions of a communications system by partitioning it into abstraction layers. The model is a product of the Open Systems Interconnection project at theInternational Organization for Standardization (ISO). The model groups similar communication functions into one of seven logical layers. A layer serves the layer above it and is served by the layer below it. For example
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SUMMARY OF ADVANCED DATABASE FUNCTIONS FOR DISTANCE EDUCATION SYSTEM: VIEW CLASSROOM Introduction Due to the mass of data that revolves around us today‚ a systematic datamanagement system needs to be developed and implemented for organization and quick retrieval of important data. In distance learning systems especially‚ a large amount of data is communicated and shared between students and educators. Hence‚ a database is needed for organization of this huge mass of data. Database refers to an organized
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development. To develop the current materials ordering system‚ a database plan is necessary for the use in Business-to-Business websites that will allow Riordan to order materials via the web from its vendors. This database plan will assist Riordan with ordering materials online from its vendors‚ increase its annual revenue and stay competitive. Database Plan Description The database plan is the first step in creating a database for the tracking of purchasing‚ materials and inventory data while
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Logical Data Models into Physical Data Models Susan Dash Ralph Reilly IT610-1404A-01 According to an article written by Tom Haughey the process for transforming a logical data model into a physical data model is: The business authorization to proceed is received. Business requirements are gathered and represented in a logical data model which will completely represent the business data requirements and will be non-redundant. The logical model is then transformed into a first cut physical model by applying
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the features of relational databases P1 Explain the features of a relational database P2 Design a relational database for a specified user need M1 Explain referential integrity and the purpose of primary keys in building the relationships between tables D1 Discuss how potential errors in the design and construction of a database can be avoided LO2 Be able to design‚ create and populate a relational database. P3 Create and populate a database P4 Create features in
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Consistency Models1 David Mosberger TR 93/11 Abstract This paper discusses memory consistency models and their influence on software in the context of parallel machines. In the first part we review previous work on memory consistency models. The second part discusses the issues that arise due to weakening memory consistency. We are especially interested in the influence that weakened consistency models have on language‚ compiler‚ and runtime system design. We conclude that tighter interaction between
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The Biomedical model of health (Also known as medical model) This model looks at people as if they are machines. The various body systems are seen as systems The biomedical model of illness and healing focuses on purely biological factors‚ and excludes psychological‚ environmental‚ and social influences. This is considered to be the dominant‚ modern way for health care professionals to diagnose and treat a condition in most Western countries. Most health care professionals do not first ask
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The history of the waterfall model The waterfall model which is also referred as a linear sequential life cycle model was the first model to be developed. The waterfall model is a sequential design process used in software development processes in which progress is seen as flowing steadily downwards(like a waterfall) through the phases of conception‚ initiation‚ analysis‚ construction ‚testing‚ production/implementation and maintenance. The waterfall model creation originates in the manufacturing
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A database is an integrated computer structure that stores end-user data and metadata (Coronel‚ Morris‚ & Rob‚ pg. 7). Data are the raw format of information‚ which when properly formatted can produce accurate‚ relevant‚ and timely information that is the key to making good decisions (Coronel‚ Morris‚ & Rob‚ pg. 5-6). The purpose of a database is to provide computer-based systems a way in which to store‚ manage‚ and retrieve data quickly (Coronel‚ Morris‚ & Rob‚ pg. 5). As for a local college database
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