Database management system is important and fundamental at present. Access databases are important and efficient storage tools. In this system, a database management system is designed and built to fulfill the requirement of the Legal Affairs Department-Investigative Committees Division-University of Diyala. The database was built using Microsoft Access databases, and the code was built using the C # programming language. This system is designed to be easy to handle for any user as an example of (Google material design) technology for the purpose of increasing interaction between the user and the program. It also contains an alert system in the event of the expiration of the investigative commission period. In this application you can easily search for any committee and its details. It also provides statistics for committees that were formed during the year or a specific month or period. It also contains reports for the purpose of printing results or saving them in various formats (PDF-WORD-EXCEL), which facilitates its compatibility with most office programs. In addition, it has a system for data protection and preservation from any unauthorized person.

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In this study, MATLAB code was used to analyze the natural frequency in two types of U-shape metal expansion bellows with various supporting conditions (fixed-fixed and fixed- free). The first bellow has a 10 mm inner diameter., and a length of (100, 200, 300) mm, has (36, 75, and 111) convolutions. While the second bellow, with an inner diameter of 20mm and (100,200,300) mm, has a number of convolutions (25,54 and 82). The result shows that by lowering the bellow length and increasing the bellow diameter, the natural frequency was raised. Were. Where, the maximum frequency was recorded at a maximum value of 20 mm in diameter and a length of 100 mm, about (13549.167 Hz) in the case of fixed-fixed and (13097.528 Hz) in the case of fixed-free. In general, the natural frequency depends directly on the stiffness and total mass of the pipe conveying fluid. The stiffness of the material is determined by the moment of inertia. As a result, increasing the diameter will increase the moment of inertia, which will result in an increase in stiffness, which will result in an increase in natural frequency.