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The aim of the publication is to design an analytical relationship for determining the bending coefficient measurable by belt friction. Following the results of the presented measurements, the theoretical assumption is verified that in the material of the belt stress arises during the friction of the contact surfaces, due to external forces and bending of the belt. Selected experiments of drawing a polypropylene belt at a constant speed over an aluminium cylindrical surface are carried out using a servo drive on a measuring bench with computer-controlled instrumentation. The results of friction and bending coefficient measurements are interpreted in connection with the setting of various input parameters (especially friction surfaces and belt thicknesses), at a constant shaft speed. The newly identified dimensionless bending coefficient of belt friction is a material coefficient with a comparative information value concerning the flexibility of the belt, suitably supplementing the friction Euler-Eytelwein coefficient. The presented publication can be suitably applied especially to the engineering educational process.

This paper describes the solution of information support for brownfield revitalization projects. We created a methodology for the creation of digital landscape models for the purpose of visualization, which enables simulation of the appearance of the landscape after implementation of the selected reclamation process. We cite an overview of data sources publicly accessible in the Czech Republic for use in GIS systems in solving the issue of brownfields. A further section of this paper presents the results of the COBRAMAN international project, under which we, as the co-directors, proposed and implemented into operation a database of brownfield revitalization projects under solution in Central Europe. This database provides “best practices” from a whole spectrum of areas related to revitalization project of all types of brownfields.

Every company and institution faces the necessity to manage its inventory. For high accuracy, security and easy operation of inventory management system it is necessary to have an easily recognizable identifier on all managed objects. The aim of our present project is to modernize the methods of automatic inventory management and asset protection with the help of the application of radio frequency identification technology (RFID hereinafter) to automatically identify the occurrence of marked objects. During the solutions we have to deal with many obstacles such as the bindings of data flowing from RFID system with internal information systems of asset owner companies. Appropriate choice of tags for individual subjects, their testing and readability experiments also have to be done. Another important part of the solution, that has to be developed in the project, is the system of reading gates. The gates are integrated in the door frames to allow automated identification of the objects brought in and out of the selected room. By modifying of mentioned solution we also introduce the design of a gatehouse that is able to prevent theft or unauthorized take away of material and equipment. In contrast, when the permitted items are taken away the system can easily generate the necessary forms to manage status of selected objects, decreasing the administrative burden. The result of the project is a solution consisting of information system and described hardware components for inventory management. The information system is possible to integrate with corporate ERP information systems. The pilot project was implemented and tested at VSB laboratories and we suppose deployment of the system in close future in cooperation with TINT Ltd. Company.

Technological processes in the raw material industry often operate continuously and requirements for high robustness and fail safe operation of the information and control systems are defined for them to fall into the fault-tolerant category. A critical element of fault-tolerant solutions ensures the continuity of data in databases. Data on the course of technological processes assume the nature he of a time series, and in the event of failure, can be attributed to a lack of data distortion in the calculation of trends, trailing averages and calculation balance evaluation. We tested the database mirroring technology in most common database systems (Microsoft SQL Server, MySQL and InterSystems Cache) in the low-price Standard category. The paper elaborates on the results of our testing and provides recommendations as to the use of database mirroring technology in information system solutions for continuous production processes.

The paper analyzes data measured by monitoring equipment prototype designed for measuring mine gas properties. The data covers measurements obtained during the first months after deployment of the monitoring equipment. The system measures CH 4 , CO 2 and O 2 concentrations, and also the speed and volume of the exhausted mine gas. The analysis of the measured data focuses on finding dependencies between variables and thus on finding possibilities for predicting and conditioning the behavior of mine gases. This analysis will also serve to identify and verify safety issues concerning the deployment of new monitoring devices based on the present prototype.

The paper deals with fault tolerant information systems in raw material industry. Database is a heart of every information (control) system. To store the system in the category of fault tolerant (or disaster tolerant) systems, the goal is to solve the database continuity. Current database systems offer technology for online data mirroring. The paper brings details about solution of database mirroring using Microsoft SQL Server, with practical experiences on real projects.