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Almaty, Kazakhstan

Kazakh National Technical University named after Kanysh Satpayev is a leading technical university in Kazakhstan . Wikipedia.

Baimenshina G.,Kazakh National Technical University
Journal of Physics: Conference Series

In this paper the dynamics of a two-mode semiconductor laser model is considered. The dynamic evolution of a two -mode semiconductor laser can be described by nonlinear rate equations, which take in account the gain saturation. Changes in parameters of the system can lead to changes of the character of the solutions. Qualitative analysis of the system is used for investigating the typical bifurcations and allowed conditions for the existence of different types of mode oscillations in the system. The phase portraits of steady state solution of system are plotted using numerical methods. The competition phenomenon between modes is observed. © Published under licence by IOP Publishing Ltd. Source

Kudaikulova G.,Kazakh National Technical University
Journal of Physics: Conference Series

Therheological properties of drilling muds were studied. It is shown that for receiving pseudo-plastic liquids with an indicator of nonlinearity of N<0.3 use of polymers with a high molecular weight or a combination of polymers to various influence on water structure is most expedient. © Published under licence by IOP Publishing Ltd. Source

Kudaibergenov S.E.,Kazakh National Technical University | Kudaibergenov S.E.,Institute of Polymer Materials and Technology | Nuraje N.,Massachusetts Institute of Technology | Khutoryanskiy V.V.,University of Reading
Soft Matter

This review describes the state-of the-art of nano-, micro- and macrogels, membranes, micro- and nanocapsules, as well as multilayered thin films exhibiting amphoteric character. The synthetic strategies and physicochemical properties of amphoteric materials are outlined in light of the stimuli-responsive behavior and their potential application in nanotechnology, biotechnology and medicine. This journal is © 2012 The Royal Society of Chemistry. Source

Baibatsha A.B.,Kazakh National Technical University
International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives

For work materials used multispectral satellite imagery Landsat (7 channels), medium spatial resolution (14, 25-90 m) and a digital elevation model (data SRTM). For interpretation of satellite images and especially their infrared and thermal channels allocated buried paleovalleys pre-paleogene age. Their total length is 228 km. By manifestation of the content of remote sensing paleovalleys distinctly divided into two types, long ribbon-like read in materials and space survey highlights a network of small lakes. By the nature of the relationship established that the second type of river paleovalleys flogs first. On this basis, proposed to allocate two uneven river paleosystem. The most ancient paleovalleys first type can presumably be attributed to karst erosion, blurry chalk and carbon deposits foundation. Paleovalleys may include significant groundwater resources as drinking and industrial purposes. Also we can control the position paleovalleys zinc and bauxite mineralization area and alluvial deposits include uranium mineralization valleys infiltration type and placer gold. Direction paleovalleys choppy, but in general they have a north-east orientation, which is controlled by tectonic zones of the foundation. These zones are defined as the burial place themselves paleovalleys and position of karst cavities in areas interfacing with other structures orientation. The association of mineralization to the caverns in the beds paleovalleys could generally present conditions of formation of mineralization and carry it to the «Niagara» type. The term is obviously best reflects the mechanism of formation of these ores. Source

Algazy Z.,Kazakh National Technical University
Vibroengineering Procedia

In this paper is studied a vibratory conveyor that is placed on an elastic base. Using the closed contours method it was determined the system that needs to be solved to obtain graphical representation for the generalized coordinates determining the position of the mechanical system elements. The shaking conveyor represents the chase hanged or supported to the fixed section. The chase commits oscillating motions hereupon the cargo which is in the chase, migrates concerning to the chase. The nature of the flow and its parameters are determined by the nature of the oscillating committed by the chase. Justifying the dynamic parameters of the shaking conveyor and a study of the stress-strain state. Installation causes fluctuations fixed tray. Uniformly distributed load on the tray acts in each element of the mechanism. A proper dynamic model has been developed within MSC ADAMS software. Simulation tests have been carried out and results are discussed to validate the proposed design solution. © JVE International Ltd. Source

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