Information modeling is a critical process in content management. This book provides basic concepts of information models and explains how to design database based on data analysis and SQL models. It also provides case studies of database design based on information modeling techniques.
This book provides an introduction to the specification and implementation of organizational information systems. It aims to combine and integrate these traditionally compartmentalized activities. This unity is achieved through the use of a relational specification language Z in conjunction with the relational database language SQL. Both these languages have their roots in predicate logic and set theory. Features of the book include:
An introduction to sets, functions and relations which provide the essential foundations for understanding information systems.
A thorough coverage of SQL.
An introduction to database design through two contrasting graphical notations -- conceptual schema and entity-relationship diagrams.
An introduction to the essential components of the Z notation and to the conventions regarding its use.
A discussion of the relationship that must be established between an information system as implemented and its original specification.
Case studies.
End-of-chapter exercises, many of which are answered thus allowing students to pace themselves through the book.
The book suggests that we should take a knowledge-based approach to the development of information systems, with the knowledge first being represented using Z and then re-stated as application programs that use SQL to process a database. Thus the book will be of interest to computing professionals who work in the areas of systems analysis, database design and application programming. It will also provide an integrated introduction to these topics for students of information systems and computer science.
Designed for everyone using Linux operating systems, this Linux quick guide covers all daily used Linux features and options, provides quick tips and solutions for common Linux security problems and other operations.
A comprehensive yet portable Unix reference for every Linux user to harness the power of Linux features, functions and tools.
Linux operating system architecture.
Table of Linux distributions and popular shells deployed in Linux systems.
Linux file system structure and commonly used configuration files in Linux systems. Frequently used commands and tools for file and directory management.
Security risks and Linux solutions in the categories of data protection, system update, user management, Internet threats and more.
Frequently used commands and tools for user and group management, jobs and processes management, networking operations, system management and more.
Designed by experts with decades of experience in Unix/Linux operating systems.
Designed for everyone using Unix operating systems, this Unix quick guide covers all daily used Unix features and options, provides quick tips and solutions for common Unix security problems and other operations.
A comprehensive yet portable Unix reference for every Unix user to harness the power of Unix features, functions and tools.
Unix operating system architecture.
Historic chart of Unix distributions and popular shells deployed in Unix systems.
Unix file system structure and commonly used configuration files in Unix systems. Frequently used commands and tools for file and directory management.
Security risks and Unix solutions in the categories of data protection, system update, user management, Internet threats and more.
Frequently used commands and tools for user and group management, jobs and processes management, networking operations, system management and more.
Designed by experts with decades of experience in Unix operating systems.
A lot of developers programming in the Windows environment often come across the problem that they cannot access hardware resources. As soon as an application tries to access the i/o port of some device, an exception occurs and the application is terminated with an error. The situation is not better concerning accessing physical memory addresses: due to the mechanisms of memory protection and page translation, you will never be able to access the physical memory of your computer. The only way out in this situation is to write your own kernel-mode driver that will be performing all privileged operations. Taking into account the fact that drivers for different operating systems from the Windows family have different architecture, this task will likely to cause considerable expenses in developers' efforts and time.
Active Port Pro is an ActiveX control used for controlling and managing any types of hardware devices via i/o ports, as well as for accessing the physical memory of a computer. Active Port Pro has been initially developed to make programming hardware devices in the Windows environment as easy as possible. With Active Port Pro, a lot of complex operations that usually take much time and become a headache for developers are performed completely imperceptibly and often even without a single line of code. At present, Active Port Pro is compatible with all commonly used programming languages (including .NET languages) and with all operating systems of the Windows family (including Windows 2003).
What Active Port Pro is used for:
1. Fast direct access to the i/o ports of various hardware devices.
As you know, operating systems based on Windows NT (Windows NT/2000/XP/2003) forbid accessing the i/o ports of hardware from user applications. This restriction is due to the fact that by default i/o operations from user applications are forbidden in a special internal operating system table called an...
AT Electronics, the Automotive Training & Diagnostic Software: This is INTERACTIVE software that works in conjunction with textbooks and on-line learning. Its all to do with... INPUTS - CONTROL - OUTPUTS The main AT program is a combination of Electronics and Diagnostics. Learn how complex systems work AND how to diagnose faults with them. The program concentrates on engine management but other systems are included. A MultiScope program is also p...
