frequency ranges include in the following frequency subdivision: MF ‚HF‚ VHF‚ UHF‚SHF? MF= 300 kHz-3MHz HF= 3-30MHz VHF= 30-300MHz UHF=300 MHz-3GHz SHF= 3-30 GHz 9. Convert the following powers to their dbm equivalents: (a) p=1W (30 dbm 0 (b) p= 0.001 W (0 dbm) (c) p=0.0001 w (-10 dbm) (d) p=25uW (-16 dbm) 15. Define electrical noise‚ and explain why it is so troublesome to a communications receiver. Electrical noise may be define as any undesired voltages or currents that ultimately end
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7. The only way to access the data in a database is through the DBMS. ANS: T PTS: 1 REF: 7 8. Database programming languages receive all application requests and translate them into the complex operations required to fulfill those requests. ANS: F PTS: 1 REF: 7 9. The DBMS reveals much of the database’s internal complexity to the application programs and users. ANS: F PTS: 1 REF: 7 10. One disadvantage of the DBMS is that it increases the risk of data security breaches. ANS:
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Individual Case Assignment: Harrah’s Entertainment‚ Inc. 1. What are the objectives of the various Database marketing (DBM) programs and are they working? There are two main overall objectives of Harrah’s Database marketing (DBM) programs. First‚ Harrah’s strived to build‚ increase and retain customers’ loyalty to their brand‚ similar to the way people tend to be loyal to their mechanic or hair dresser. The strategy to achieve this goal was to ensure that they crafted and sustained a relationship
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System (DBMS) is the software system that allows users to define‚ create and maintain a database and provides controlled access to the data provided by your database administrator(s). DBMS is an intermediate layer between programs and the data. Programs access the DBMS‚ which then accesses the data. There are different types of DBMS ranging from small systems that run on personal computers‚ corporation window servers‚ large mainframes‚ etc. Let’s look at some of the benefits from have a DBMS. 1) Controlling
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description of this data)‚ designed to meet the organization needs of an organization The Database Management System (DBMS) - software that enables users to define‚ create and maintain the database and provides controlled access to the database Why We Need DBMS There is an information explosion in today’s society – Need to keep accurate records Advantages of using a DBMS fall into three main categories: – – – Proper maintenance of the data Providing access to the data Maintaining
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For this week ’s paper I have chosen to do a comparison between IBM ’s DB2 database management system (DBMS) product and Oracle. Realistically‚ making such a comparison is akin to discussing religion with friends. Each person will have their own biases based on their own experiences. Looking for an unbiased opinion is much like looking for the Holy Grail‚ every bit as speculative and subjective with the results jaundiced by the outlook of the reporter (Lim‚ 2002). A decision between DB2 and Oracle
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of it has become a de facto standard of the industry. ANSI SQL has become the standard query language to interact with any DBMS‚ though each vendor has its own extension to the standard SQL. (The Indian Express Limited) According to Gartner‚ in 2008‚ the Indian DBMS market was worth around $194 million and is expected to grow by 20% in 2010 over 2009. It expects the Indian DBMS market size to reach $233 million in 2010. According to a Forrester Research report‚ the open-source database market stands
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MMIS 630 Database Systems – Final Exam 1. What are the issues in the normalization vs. performance trade-off? Discuss. Your essay should (1) define and describe the characteristics of normalization‚ (2) define and describe the characteristics of performance‚ and (3) define and describe what is meant by “performance trade-off”‚ (4) summarize your essay with recommendations and/or guidelines regarding use of normalization in database design. ANS: When we take a close look in designing
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1. DBMS a) Problem with the traditional file environment In most organizations systems tended to grow independenty without a company-wide plan. Accouning‚ finance‚ manufacturing‚ human resources‚ and sales and marketing all developed their own systems and data files. Each application of course‚ required its own files and its own computer program to operate. For example‚ the human resources functional area might have personnel master file‚ a payroll file‚ a medical insurance file‚ a pension
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approach to the storage and processing of data in which independent files are consolidated into a common poolor database of records available to different application programs and end users for processing and data retrieval. Database Management System (DBMS): A set of computer programs that controls the creation‚
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