Abdullayev E.,Louisiana Tech University |
Abdullayev E.,Applied Minerals Inc. |
Abbasov V.,Azerbaijan Academy of Sciences |
Tursunbayeva A.,Karaganda State Technical University |
And 4 more authors.
ACS Applied Materials and Interfaces | Year: 2013
Halloysite clay nanotubes loaded with corrosion inhibitors benzotriazole (BTA), 2-mercaptobenzimidazole (MBI), and 2-mercaptobenzothiazole (MBT) were used as additives in self-healing composite paint coating of copper. These inhibitors form protective films on the metal surface and mitigate corrosion. Mechanisms involved in the film formation have been studied with optical and electron microscopy, UV-vis spectrometry, and adhesivity tests. Efficiency of the halloysite lumen loading ascended in the order of BTA < MBT < MBI; consequently, MBI and MBT halloysite formulations have shown the best protection. Inhibitors were kept in the tubes buried in polymeric paint layer for a long time and release was enhanced in the coating defects exposed to humid media with 20-50 h, sufficient for formation of protective layer. Anticorrosive performance of the halloysite-based composite acrylic and polyurethane coatings have been demonstrated for 110-copper alloy strips exposed to 0.5 M aqueous NaCl for 6 months. © 2013 American Chemical Society.
Andreyachshenko V.A.,Karaganda State Technical University |
Naizabekov A.B.,Rudny Industrial Institute
Metalurgija | Year: 2016
In the present research, equal channel angular pressing (ECAP) was conducted. The defectness degree of the alloy for one pass and maximum strain was determined. Ultra fine grained AlSiMnFe alloy was produced by refining grained annealed bulk by multi-pass ECAP at room temperature. The results reveal two regimes: from 1 to 2 passes the microstructure evolves to a equiaxed of ultrafine grains and from 2 to 4 passes there is no strict change in the average grain size. © 2016, Faculty of Metallurgy. All rights reserved.
Tenchurina A.R.,Karaganda State Technical University |
Sal'keeva A.K.,Karaganda State Technical University
Russian Journal of Physical Chemistry A | Year: 2016
The thermal treatment of sodium sulfate was found to affect its optical and luminescent properties when activated with trivalent rare-earth ions. The influence of crystal water molecules on radiation processes in sodium sulfate was studied. The interactions of atomic hydrogen with ions and radicals were calculated by the semiempirical MNDO quantum-chemical method. The hydrogen atom was found to form stable complexes with all ions and radicals. The ions and radicals of the sulfate subsystem play the role of traps for hydrogen atoms and escape recombination, giving rise to recombination luminescence at 150 K during UV excitation of the crystalline hydrate. © 2016 Pleiades Publishing, Ltd.
Andreyachshenko V.A.,Karaganda State Technical University
Metalurgija | Year: 2016
In the paper there is studied stressed-and-strained state formed in a billet by fullering in a tool with movable elements. It is determined that compressing stresses prevail in the studied tool; they improve the quality of the processed billets. Even maximum main normal stresses have compressing characteristics at slight tensile stresses. Stressed-and-strained state was studied by using the computer simulation method which was performed in the DEFORM 3D software. The obtained results confirm the efficiency of the new tool in processing cylindrical billets. © 2016, Faculty of Metallurgy. All rights reserved.
Galin I.A.,Karaganda State Technical University
Measurement Techniques | Year: 2016
Designs of multichannel belt-conveyor weighers are considered. A technique for verification of such weighers using a reference load is presented. It is shown that in the course of inspection multichannel belt-conveyor weighers may be represented by a combination of two-channel weighers without halting the technological process. © 2016, Springer Science+Business Media New York.
Pak Y.N.,Karaganda State Technical University |
Pak D.Y.,Karaganda State Technical University
Coke and Chemistry | Year: 2012
A method for express analysis of coal is proposed. In this method, the error in determining the calcium content is minimized by selecting the optimal parameters of the X-ray fluorescent method. © 2012 Allerton Press, Inc.
Ospanova B.R.,Karaganda State Technical University
Life Science Journal | Year: 2014
Linguistics is one of the most computerized and mathematized humanities that is proved by the presenceof such fields of science of language, as mathematical linguistics, linguistic statistics, applied linguistics, computerlinguistics. Present day linguistic studies require using information technologies and mathematical methods ofinformation processing for the revealing of linguistic phenomena essence. Mathematics is a universal language ofscience and a powerful means of solving applied problems in a lot of fields of science. Thus, the most urgentproblem of present day linguistic education is the use of mathematical and information technologies in carrying outscientific research.
Ospanova B.,Karaganda State Technical University
Life Science Journal | Year: 2013
In the article there are reflected the results of the study which purpose was using a measure of information amount permitting to analyze the general mechanisms of information-entropic characteristics of the texts laying in the basis of all spontaneously running in the surrounding world processes of information accumulating that lead to the system structure self-organization. There are presented some aspects of the experimental approach to calculating the text entropy, experimental data demonstrating the results. There is suggested a linguistic-mathematical model for analyzing the text structure based on the fundamental law of preserving the sum of information and entropy using Shannon's formula, as well as a comparative analysis of the text entropic characteristics in Kazakh and Russian.
Muravyov S.V.,Tomsk Polytechnic University |
Marinushkina I.A.,Karaganda State Technical University
14th Joint International IMEKO TC1, TC7, TC13 Symposium on Intelligent Quality Measurements - Theory, Education and Training 2011, Held in Conj. with the 56th IWK Ilmenau University of Technology | Year: 2011
Interlaboratory comparisons need a reference value of the measurand to be assigned. It is necessary to have some procedure that allows to determine the reference value at a maximum number of participating laboratories results to be included into the determination and, at the same time, unreliable laboratory results must be disregarded. It is shown in the paper that this procedure can be implemented using a preference aggregation approach.
Aubakirova G.,Karaganda State Technical University
Engineering Economics | Year: 2014
In the economy of the Republic of Kazakhstan there still continues orientation towards raw materials and dependence on the world raw materials markets conjuncture. The key causes of the low level of the economy competitiveness are related to the decoupling between science and production, insufficient financing of innovation projects, absence of the efficient mechanisms of bringing scientific-technical production to the level of goods, high capital consumption.Renunciation of the raw materials model requires modernization and simultaneous transition to the innovation economy, as Kazakhstan relates its constant stable growth, first of all, to the transition to the innovation way of development. Today Kazakhstan is actively forming a new economy which is being built on the present day knowledge and competitive innovations. Besides, the purpose of institutional transformations is the establishing of the market innovative-active subjects. However, till nowadays the program of reduction of home economy dependence of on raw materials does not give the expected results and until this key problem is left unsolved, it will effect negatively economy’s development, especially in case of the sharp worsening of the environment. Unconditionally, there are other domestic problems that will prevent from supporting a stable growth.Kazakhstan’s transition to the innovation type of development can be conditionally divided into two stages. The beginning of the first stage is connected with adoption of the Strategy of industrial-innovation development in 2003, formation of the institutional base and the key moments of the national innovation system. In 2010, having adopted the State program of forced industrial-innovation development of the country for 2010–2014 there began the stage of accelerated building of the innovation economy, strengthening of legislative and financial stimulation of the innovation activity.At present the efforts of the state innovation policy are aimed to, firstly, the development of innovation clusters and innovation environment, secondly, the increase of the innovation infrastructure efficiency, thirdly, the development of principally new system of scientific-technological developments’ commercialization.Up to 2015 the main priority trends of the state policy on the country’s forced industrialization will become realization of innovation-investment projects in traditional export-oriented sectors of economy. The main accent will be made on development of new instruments of the state-private partnership in the sphere of innovations development, as well as target technological programs for co-funding prospective research.Within the frames of the article there is shown the state role in development and support of the innovation sphere, the accent is made on the state regulation of Kazakhstan’s industrial enterprises innovation activity. © 2014, Kaunas University of Technology. All rights reserved.