New opportunities of computer assessment of knowledge based on fractal modeling

In this article the urgent problem of control systems modeling of professional competences and mathematical knowledge assessment of students is discussed. Pedagogical expediency in management of students` cognitive activity by using of new informational technologies instruments in monitoring and assessment of knowledge is proved. The possibility of fractal methods application in perfecting of the system of computer monitoring of mathematical knowledge of students as a part of the adaptive training systems is considered and realized. The design of the technology of computer monitoring of students` knowledge on the basis of fractal methods includes the following stages: development of cross-disciplinary fractal and organized base of key mathematical concepts; the creation of the expansible bank of educational and cognitive and research tasks, which is coordinated with fractal structure of the conceptual framework; the development of the program module, which is focused on individual estimation of quality of students` educational cognitive activity in two characteristics — depth of knowledge based on the Hurst exponent and the size of synergetic effect of educational cognitive activity. The software realization of technology of the computerized control of training in mathematical disciplines quality as a part of the adaptive training system is enabled in the programming language C#. The experience of implementation and operation of the controlling systems realized in the adaptive training systems based on the fractal model operation showed reliability of their work and allowed to increase the quality of educational process management and its effectiveness in general. Using of fractal techniques in computer assessment of mathematical knowledge of students makes it possible to increase the accuracy and speed of evaluation of the students` knowledge.

Noise Level Measuring Options and Their Use in Technological Processes

Working environment has changed in the last few years and work has become more intensive i.e. demand for maximum attention and concentration, workload adaptions with the mental and physical abilities of human, solvation of various organising issues. Risk factors of working environment can be found in every profession and may affect a large number of employees. One of the essential issues in wood processing is noise presence during machining, which is why noise level determination at the workbench during whole working day is important thing to do. Measuring devices of the noise level are with various technological abilities, from which one need to choose the most appropriate for the particular situation. Some of the devices are or may be equipped with data recorder, which allows to save measured data for subsequent computer assessment. The article analyses Latvian legislation concerning the noise level determination in the workplace as well as allowable limits. The article offers simplified means of the noise measurement and registration abilities.