System basics

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  • 1. STEPPER MOTOR SYSTEMS OVERVIEW Motion Control, in electronic terms, means to accurately control the movement of an object based on either speed, distance, load, inertia or a combination of all these factors. There are numerous types of motion control systems, including; Stepper Motor, Linear Step Motor, DC Brush, Brushless, Servo, Brushless Servo and more. This document will concentrate on Step Motor technology. In Theory, a Stepper motor is a marvel in simplicity. It has no brushes, or contacts.

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  • Operating System Basics .What is an Operating System • Resource Manager - Resource include: CPU, memory, disk, network - OS allocates and de-allocates these resources • Virtual Machine - provides an abstraction of a larger (or

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  • This authoritative book, highly regarded for its intellectual quality and contributions provides a solid foundation and life-long reference for anyone studying the most important methods of modern signal and system analysis. The major changes of the revision are reorganization of chapter material and the addition of a much wider range of difficulties.

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  • The aim of this book is to provide readers with a fundamental understanding of digital system concepts such as logic gates for combinatorial logic circuit design and higher level logic elements such as counters and multiplexers. First year undergraduates taking a course in computer science or engineering (and related disciplines like information technology) are the main target audience. Foundation year students and those taking pre-university courses (like ‘A’ levels) will also benefit from the text. I have tried to follow a simple approach in writing the text.

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  • Spirax Sarco is the recognized industry standard for knowledge and products and for over 85 years has been committed to servicing the steam users worldwide. The existing and potential applications for steam, water and air are virtually unlimited. Beginning with steam generation, through distribution and utilization and ultimately returning condensate to the boiler, Spirax Sarco has the solutions to optimize steam system performance and increase productivity to save valuable time and money.

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  • .This lesson includes the following sections: • Average Access Time • File Compression • Data-Transfer Rate • Drive-Interface Standards .Average Access Time • In storage devices, average access

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  • Chapter 1 - Role and purpose of accounting information systems. After studying this chapter you will be able to: Define “accounting information systems”, discuss why AIS is an important area of study for future accountants, compare and contrast AIS with other areas of accounting, explain the structure of most AIS, locate and evaluate information sources on AIS.

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  • Chapter 2 - Transaction processing in the AIS. After studying this chapter you will be able to: Differentiate accounting and bookkeeping; list, discuss and complete, in order, the steps in the accounting cycle; identify common internal controls associated with the accounting cycle; describe common coding systems and how they are used in the AIS; explain how human judgment and information technology affect the accounting cycle.

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  • Chapter 3 - Internal controls. After studying this chapter you will be able to: Define internal control and explain its importance in the accounting information system, explain the basic purposes of internal control and its relationship to risk, describe and give examples of various kinds of risk exposures.

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  • Chapter 4 - Management concepts. After studying this chapter you will be able to: Summarize and explain the importance of COSO's enterprise risk management - integrated framework; define business process management, including a generalized model of BPM; list and discuss some basic principles of business process management; explain expectancy theory; apply all three topics within the context of accounting information systems.

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  • Chapter 5 - Information systems concepts. After studying this chapter you will be able to: List and discuss, in order, the steps in the systems development life cycle; explain the advantages and disadvantages of using the SDLC; apply the SDLC in accounting contexts; list and discuss the levels of the capability maturity model; classify organizations' processes according to the CMM; explain factors managers should consider when choosing IT for an AIS.

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  • Chapter 6 - Flowcharting. After studying this chapter you will be able to: List and discuss the purpose and use of systems flowcharts, document flowcharts, program flowcharts, and hardware flowcharts; explain the basic parts of and design considerations common to all types of flowcharts; identify and describe common symbols and information technology tools used in flowcharting.

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  • Chapter 7 - Data flow diagramming. After studying this chapter you will be able to: Explain the symbols and design considerations associated with DFDs; compare and contrast flowcharts and DFDs with regard to purpose, content, structure, and use in accounting information systems; discuss the ways in which DFDs are used in AIS work; construct a leveled set of DFDs; design normalized database tables from a DFD.

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  • Chapter 8 - REA modeling. After studying this chapter you will be able to: Compare and contrast view-driven and event-driven accounting information systems, use REA modeling to represent an event-driven AIS, use a REA model to design a relational database for an event-driven AIS.

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  • Chapter 10 - E-business and enterprise resource planning systems. After studying this chapter you will be able to: Explain the nature of e-business, comparing and contrasting it with traditional “brick-and-mortar” organizations; discuss major forms of e-business; describe the basic nature, purpose, and structure of enterprise resource planning systems.

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  • Chapter 11 - Computer crime and information technology security. After studying this chapter you will be able to: Explain Carter’s taxonomy of computer crime, identify and describe business risks and threats to information systems, discuss ways to prevent and detect computer crime, explain the main components of the CoBIT framework and their implications for IT security.

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  • Chapter 12 - Sales/Collection process. After studying this chapter you will be able to: Explain its role and purpose; list and discuss, in order, the steps in the process; explain how the generic structure of most AIS applies to the process; process common transactions; design & critique internal controls based on common risk exposures; develop & interpret process-related systems documentation.

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  • Chapter 13 - Acquisition/Payment process. After studying this chapter you will be able to: Explain its role and purpose; list and discuss, in order, the steps in the process; explain how the generic structure of most AIS applies to the process; process common transactions; design & critique internal controls based on common risk exposures; develop & interpret process-related systems documentation.

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  • Chapter 14 - Other business processes. After studying this chapter you will be able to: Explain its role and purpose, explain how the generic structure of most AIS applies, identify and process common transactions, design and critique internal controls based on common risk exposures, develop and interpret process-related systems documentation.

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  • Chapter 15 - Decision-making models and knowledge management. After studying this chapter you will be able to: Discuss and give examples of the concept of information overload, including causes, symptoms, and countermeasures; explain the nature of decision models and knowledge management; explain why those two topics are important in the study of accounting information systems.

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