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Goponenko A.S.,Tomsk Polytechnic University | Stukach O.V.,Tomsk Polytechnic University | Mirmanov A.B.,S. Seifullin Kazakh Agro Technical University | Kochumeev V.A.,Tomsk Polytechnic University
International Conference on Systems, Signals, and Image Processing

This paper describes the design of Gunn diode hybrid-integrated power transmitter at X-band. The device delivers about 15 Watt of pulse output power, in short-pulse operating conditions, at 9.5-10.5 GHz central frequency. The transmitter is designed to be used as final stage of a downlink measurement-while-drilling transmitter for telemetry system. A commercial Gunn diode has been selected for design. Due to the MWD application, special attention must be put on the process and reliability: to this aim temperature of the active device must be kept within the value established by borehole requirements and carefully controlled. This makes the design objective very tight. The power transmitter design and some measurement results are presented in the paper. © 2014 University of Zagreb. Source

Baybussenov K.S.,Agrarian National University | Sarbaev A.T.,Kazah Scientific Research Institute of Cultivation and Crop Production | Azhbenov V.K.,S. Seifullin Kazakh Agro Technical University | Harizanova V.B.,Agricultural University of Plovdiv
Life Science Journal

Analysis results of long-standing population dynamics of nongregarious locusts in northern regions of Kazakhstan are presented in the article. Some regularity was revealed. Thus, the expected cyclicity of certain phases of the phytophagous organisms population dynamics is not always maintained. They are subject to change under the influence of environmental factors. They often vary depending on the weather conditions of the previous and the current year, as well as the completeness of the volume of chemical treatments. The data obtained can be offered by us as a criteria of forecasting trends of the the next phase of nongregarious locusts population dynamics in northern Kazakhstan. Source

Altaibaeva Z.,Innovative University of Eurasia | Bauer-Kenzhebolatova M.,S. Seifullin Kazakh Agro Technical University | Zhaltyrova O.,Innovative University of Eurasia
International Journal of Economics and Financial Issues

The article presents flour production behavior in the Republic of Kazakhstan, flour export by countries, wheat flour and bread prices. The authors have analyzed the raw materials base of the flour-milling industry (acreage, yield, crop page). Flour is the most important grain-processing product. It is a raw material for the production of such irreplaceable foodstuffs as bread, bake and paste goods that meet an essential part of human daily needs in vital energy and nutrients. Kazakhstan has a substantial grain and flour export potential. Flour export is important for the grain industry of the Republic, and economy of the country in whole. The country ranks among the six biggest grain exporters in the world. This is because Kazakhstani grain has high milling property, and the quality of Kazakhstani flour is rated high in many countries. It enables Kazakhstani flour to be competitive on the world market and to ensure end markets in different countries. Kazakhstani flour is exported mainly to Uzbekistan, Afghanistan and Tajikistan (90-92% of flour export). A part of local flour is exported to Kirgizia, Turkmenistan and Mongolia. Kazakhstan rapidly develops its grain-processing industry. Grain processing means not only flour production, it includes motor and railway transport, internal and external commercial operations, electricity consumption, etc. The authors present priorities and solutions for the flour-milling industry. © 2016, Econjournals. All rights reserved. Source

Stukach O.V.,Tomsk Polytechnic University | Mirmanov A.B.,S. Seifullin Kazakh Agro Technical University
2014 Dynamics of Systems, Mechanisms and Machines, Dynamics 2014 - Proceedings

This paper describes the power stage of downlink of measurement-while-drilling (MWD) telemetry system. Design of this system is modern direction in geo- and radiophysics due transition to a new communication channel between drilling point to surface. The device is the X-band Gunn diode hybrid-integrated power amplifier-transmitter. Its advantage is high efficiently and low current from bias. The pulse output power is about 15 Watt in short-pulse operating conditions, at 9 GHz central lobe frequency. Due to the MWD application, the special attention pays to circuit and repeatability of characteristics. Design and packaging is very tight and give a possibility to put device into the drilling gun. The experimental bench and some measurement results are presented in the paper. In particular, output power and frequency of the center lobe as function of voltage and current of transmitter is shown. © 2014 IEEE. Source

Fakhrullin R.F.,Kazan Federal University | Tursunbayeva A.,S. Seifullin Kazakh Agro Technical University | Portnov V.S.,Karaganda State Technical University | L'vov Y.M.,Louisiana Tech University
Crystallography Reports

The use of natural halloysite clay tubes 50 nm in diameter as nanocontainers for loading, storing, and slowly releasing organic corrosion inhibitors is described. Loaded nanotubes can be mixed well with many polymers and dyes in amounts of 5–10 wt % to form a ceramic framework (which increases the strength of halloysite composites by 30–50%), increase the adhesion of these coatings to metals, and allow for the slow release of corrosion inhibitors in defects of coatings. A significant improvement of protective anticorrosion properties of polyacryl and polyurethane coatings containing ceramic nanotubes loaded with benzotriazole and hydroxyquinoline is demonstrated. © 2014, Pleiades Publishing, Inc. Source

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