Information Technology of the Educational Planning and Curriculum Development

In: A.J. Kallenberg and M.J.J.M. van de Ven (Eds), 2002, The New Educational Benefits of ICT in Higher Education: Proceedings. Rotterdam: Erasmus Plus BV, OECR ISBN 90-9016127-9Optimal design of teaching process in higher school is realized to a considerable extent intuitively or on the basis of expert evaluations. Such an approach allows to achieve an approximate solution of the problem only. The experimental study of the teaching process and learners’ characteristics, computer-aided technologies of statistical processing of experimental data, computer simulation of the educational process, computer analysis of simulation results are proposed as methodology of this problem solution. This curriculum design is prominent for the logical project development of education, the content areas of each course, and for the professional qualification. Other opportunities of using this procedure are linked with the development of a new and modifying existing curriculum

ANALYSIS OF POSSIBLE ENHANCEMENT OF PROPERTIES OF VK15 MATERIAL USED FOR DRILLING TOOLS

Traditionally, when drilling hard and abrasive rocks, it is recommended to use a tungsten-cobalt hard alloy VK15. The analysis of information on the possibility of improving the potential of the material has demonstrated the existence of mechanisms that provide structural transformations that enhance its strength, hardness and toughness. The use of such technology instead of traditional methods will lead to an increase in the operating efficiency and durability of the tool. During the work, experimental samples of alloy VK15 were obtained by sintering in four different modes. Then their properties were analyzed. The results of the metallographic study carried out on the «Carl Zeiss» microscope made it possible to estimate the distribution of tungsten carbide grains in cobalt bon and show the grinding of the carbide phase. Thus, with traditional sintering, the amount of tungsten carbide grains with an average size of less than 1 μm in diameter from the entire size range reaches 19.5 %, while after additional heat treatment with a holding time of 1280 °C, the value was 41.5 %; 900 °C – 59.1 %; 600 °С – 54.5 %. The maximum improvement results were the following: hardness by 18 %, a coercive force by 49 %, and crack resistance by 11 % of the traditional alloy, there were achieved at 900-1280 °C. A hypothesis has been put forward on the formation of additional structural elements not detected by the methods of optical metallography. Studies of the topology and structure of the samples on an atomic force microscope confirmed the presence of nanoscale inclusions from 20 to 40 nm (presumably tungsten carbide) in a cobalt bond. For VK15, comparative studies of properties and analysis of the microstructure of experimental samples obtained by the traditional sintering and modified technology have shown that the sintering mode at 900 °C is a priority. Thus, the developed technology, including the sintering of powders in a hydrogen stream up to 750 °C, from 750 to 1450 °C in vacuum, feeding at a maximum temperature of 1450 °C for 15 minutes of argon at a pressure of 60 bar, subsequent cooling to 900 °C and 1 hour exposure, can be recommended as the most rational conditions for revealing the potential of the material and providing an enhanced level of properties of the drilling tool

Forced vibrations and acoustical properties of structural elements interacting with environment

A system of the mine power supply is considered in the paper aiming at the collection establishment of main dependences and laws of the control object displacement. The development of models, structures, algorithms of the functioning, methods and means for the effective control of mine power supply systems is also the aim of the paper. As a result the hierarchical structure model of the control distribution system, making it possible to estimate the degree of the information packing (aggregation) has been developed as well as the method of the control system analysis, consisting of the division of the controlled object set on separate subsets. The automatic-decomposition model, functioning algorithms, structures and new principles of the technical realization of the multilevel system for the mine power supply automated control have been created as well as the universal devices on microprocessor controllers, realizing the functions of the distributed system logical control. Scientific statements, conclusions and recommendations have been realized in the form of normative-technical and methodical documents, introduced on coal mines of main basins. There in the economic effectAvailable from VNTIC / VNTIC - Scientific & Technical Information Centre of RussiaSIGLERURussian Federatio

On the way to convergence between general educational courses of informatics and technology

The article concerns the conceptual fundamentals of convergence for general educational courses in informatics and technology. The necessity of such step is determined by the urgency of adequate responses to the challenges of the current information civilization: exponential growth of non-systematized data; process of convergence on the basis of information technologies. The article contains the modernized content of course technology that realizes this concept

On the way to convergence between general educational courses of informatics and technology

The article concerns the conceptual fundamentals of convergence for general educational courses in informatics and technology. The necessity of such step is determined by the urgency of adequate responses to the challenges of the current information civilization: exponential growth of non-systematized data; process of convergence on the basis of information technologies. The article contains the modernized content of course technology that realizes this concept

A MODERN COMPREHENSIVE COURSE AT SCHOOL AND UNIVERSITY: APPROACHES TO THE CONTENT DEVELOPMENT

The article considers the problem of the development of modern computer science curriculum that reflects the modern paradigm of science informatics and new educational trends, where a significant place is given to the formation of the trainees have the ability and willingness to self-education (metasubject educational outcomes). The approach, which involves the formation of a system component metasubject informatics curriculum aimed at students mastering the methods of treatment and integration of knowledge based on it empirically established areas of computer science course: technical and technological, the natural sciences and humanities

ANALYSIS OF POSSIBLE ENHANCEMENT OF PROPERTIES OF VK15 MATERIAL USED FOR DRILLING TOOLS

Traditionally, when drilling hard and abrasive rocks, it is recommended to use a tungsten-cobalt hard alloy VK15. The analysis of information on the possibility of improving the potential of the material has demonstrated the existence of mechanisms that provide structural transformations that enhance its strength, hardness and toughness. The use of such technology instead of traditional methods will lead to an increase in the operating efficiency and durability of the tool. During the work, experimental samples of alloy VK15 were obtained by sintering in four different modes. Then their properties were analyzed. The results of the metallographic study carried out on the «Carl Zeiss» microscope made it possible to estimate the distribution of tungsten carbide grains in cobalt bon and show the grinding of the carbide phase. Thus, with traditional sintering, the amount of tungsten carbide grains with an average size of less than 1 μm in diameter from the entire size range reaches 19.5 %, while after additional heat treatment with a holding time of 1280 °C, the value was 41.5 %, 900 °C – 59.1 %, 600 °С – 54.5 %. The maximum improvement results were the following: hardness by 18 %, a coercive force by 49 %, and crack resistance by 11 % of the traditional alloy, there were achieved at 900-1280 °C. A hypothesis has been put forward on the formation of additional structural elements not detected by the methods of optical metallography. Studies of the topology and structure of the samples on an atomic force microscope confirmed the presence of nanoscale inclusions from 20 to 40 nm (presumably tungsten carbide) in a cobalt bond. For VK15, comparative studies of properties and analysis of the microstructure of experimental samples obtained by the traditional sintering and modified technology have shown that the sintering mode at 900 °C is a priority. Thus, the developed technology, including the sintering of powders in a hydrogen stream up to 750 °C, from 750 to 1450 °C in vacuum, feeding at a maximum temperature of 1450 °C for 15 minutes of argon at a pressure of 60 bar, subsequent cooling to 900 °C and 1 hour exposure, can be recommended as the most rational conditions for revealing the potential of the material and providing an enhanced level of properties of the drilling tool