NU Research Week - I
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Item Open Access Quantifying water circulation in Burabay national park: towards an evaluation of potential solutions to limit lake shallowing(Nazarbayev University, 2013) Yapiyev, V.; Kabiyeva, M.M.This study is the preliminary phase of a three-year project. Its goal is to provide basic original hydrological and hydrogeological data to the scientific community about Burabay National Nature Park (BNNP) and its lakes. The major lakes of the Park are Ulken Shabakty, Shortan and Burabay. The area is experiencing a great anthropogenic load due to water uptake from the lakes for supply needs, which causes the water level decline. The hydrological study is necessary and important for the management of BNNP. The objective of the study is to analyze water balance of the lakes from 1991 to 2012 and identify the main hydrologic components, which affect water level.Item Open Access Design, synthesis and characterization of self-assembled monodisperse magnetic nanoparticles(Nazarbayev University, 2013) Rakhmetova, A.; Kanayeva, D.Using a co-precipitation method, Fe3O4 nanoparticle surfaces were modified with oleic acid or PEG.This method yields particles with broad size distribution. MNPs synthesized by thermal decomposition method appear to have narrow size distribution and monodispersity.Item Open Access Production of humic substances from Zaysan brown coal(Nazarbayev University, 2013) Aitbekova, A.; Sharafudinov, A.; Tantybayeva, B.In this research project, humic acids were obtained from activated coal samples by hydroxide and pyrophosphate methods. Activation was done using hydrochloric (HCl) and sulfuric (H2SO4) acids. Quantitative analysis shows that the optimal conditions that give the maximum yield of humic acids are activation by sulfuric acid with 1:8 ratio of solid to liquid phases, temperature of 40°C and extraction by pyrophosphate method. Coal samples were prepared according to the state standard 10742-71. The coal samples were activated by HCl and H2SO4 with solid to liquid ratio of 1:5, 1:8, and 1:10. The activation stage was performed at 25°C and 40°C. After the activation stage humic acids were extracted by hydroxide and pyrophosphate methods according to the state standard 9517-94.Item Open Access Hibrid energy generation with pumped hydro storage(Nazarbayev University, 2013) Bermukhambetova, A.; Khakimova, A.; Seitenov, D.This project proposes an installation of a demonstrative site of hydro energy storage system as a way to effectively accumulate excess energy generated from renewable sources in a form of the gravitational potential energy of pumped and stored water. Hydropower is then extracted from flowing water by means of a turbine as a useful mechanical power, which, in its turn, is converted into electricity using an electric generator.Item Open Access Portable solar stove(Nazarbayev University, 2013) Hazken, S.; Aidarkhanov, D.The project uses Fresnel lens to concentrate the sunlight as it has more light and is more compact than reflectors. Fresnel solar cookers can heat foodstuff up to oil boiling temperatures, so it can cook more kind of foods. The lens concentrates light at the bottom of the cooking vessel, and the light path lies within the frame of the cooker. This makes it safer than parabolic concentrators. The last advantage is the modular and compact design which makes the whole device easy to transport where it may be necessary – outdoor trips, camping, or remote working fields.Item Open Access Visual modeling of energetic simulations(Nazarbayev University, 2013) Aitpayev, K.; Shakenov, Ch.Numerous technologies allowing the use of virtual and augmented realities for portable and desktop devices are available. Yet we continue using paper and Power Point for presenting architectural designs, oil deposits, development plans, geological exploration results, different device prototypes and so on. Today it is possible to display such objects in three dimensions using smartphones, laptops, tablets and special glasses with webcams for augmented reality and with gyroscopes for virtual reality. Despite a large number of existing solutions, these technologies are still rarely used due to the lack of programming and 3D modeling skills of end users. The main goal of this project is to make technology of augmented reality available for an unskilled person.Item Open Access Coal gasification in circulating fluidized bed reactor(Nazarbayev University, 2013) Tokmurzin, D.; Khamitova, G.; Sharafuddinov, A.; Daueshova, B.; Orynbassarova, A.This research project is aimed at developing circulating fluidized bed gasification technology for coal being mined in Kazakhstan. The main goal is to construct a gasification technology for extra-high ash containing coals mined in Kazakhstan, particularly Ekibastuz, Maikuben, Mamyt and Torgay coals. To achieve this goal, the project will be developed in two main steps. The first step is modeling gasification process and designing the model simulation software. The second step is constructing circulating fluidized bed gasification technology.Item Open Access Novel polyamide based materials for oil based drilling fluids(Nazarbayev University, 2013) Tauanov, Z.; Baptayev, B.Overall, so far 10 amidoamines were synthesized and 6 polyamide emulsifiers were prepared. The next steps are to increase the number of polyamide emulsifiers, testing them for thermal stability and polyemulsion stability, and in drilling fluid condition.Item Open Access Internal motion capture based teleoperation of a mobile robot manipulator(Nazarbayev University, 2013) Khassanov, Y.; Imanberdiyev, N.; Varol, H. A.In this work, a full-body inertial human motion capture system Xsens MVN was used to control the Kuka youBot mobile manipulator.Item Open Access RRT*FN (fixed nodes) - a novel path planning algorithm with effective memory utilization(Nazarbayev University, 2013) Adiyatov, O.; Varol, H. A.In this work, we present a modified version of the RRT* motion planning algorithm, which limits the memory required for storing the tree. We run the RRT* algorithm until the tree has grown to a predefined number of nodes and afterwards we remove a weak node whenever a high performance node is added. A simple two-dimensional navigation problem is used to show the operation of the algorithm. The algorithm was also applied to a high-dimensional redundant robot manipulation problem to show the efficacy. The results show that our algorithm outperforms RRT and comes close to RRT* with respect to the optimality of returned path, while needing much less number of nodes stored in the tree.Item Open Access Machine learning based locomotion strategy selection for a legged wheeled hybrid quadruped(Nazarbayev University, 2013) Saudabayev, A.; Kungozhin, F.; Nurseitov, D.; Varol, H. A.In this work we present the Nazarbayev University Hybrid Quadruped (Fig. 1) – four legged and four wheeled mobile robot platform capable of navigating in both configurations avoiding the shortcomings of robots with single locomotion mode. The major novelty of the robot is the implementation of the supervisory controller which selects a locomotion mode associated with particular terrain types based on the classification of depth images acquired by a RGB-Depth camera. The accuracy of the terrain classification for the testing database in a five class terrain recognition problem (Level Ground, Nontraversable, Stair Down, Stair Up, Uneven terrain types) is 96.7% percent. Majority voting filter technique is used to increase the reliability of the terrain recognizer decisions.Item Open Access Nazarbayev university multigrasp hand and anthropomorphic robot arm(Nazarbayev University, 2013) Tursynbek, I.; Zhakatayev, A.; Varol, H. A.In this work, we are presenting our latest developments in the design and implementation of the Nazarbayev University Robot Arm Complex.Item Open Access Modeling of the Caspian region energy system(Nazarbayev University, 2013) Ayashev, K.; Akhmetbekov, Y.; Ibrayeva, A.; De Miglio, R.This is the first instance when the Caspian Region fuel and energy complex is modeled with sufficiently detailed representation of both supply and demand sides (bottom-up approach). The technological description of the existing mix of plants, demand devices, industrial chains can be further improved, nevertheless there are several energy environmental actions that might be tested and evaluated using this model: • a cooperative implementation of energy commodity inter-trade across the four Countries and exports levels (quantities) of the Area as a whole; • the insertion of national-specific constraints aiming at stressing the systems on prospects of the renewable energy usages and on energy efficiency potential; • the insertion of a single environmental target for the whole area in the context of GHG reduction.Item Open Access Energy, economic and ecological modelling of variants of the Republic of Kazakhstan energy system development and its connection with the global energy system(Nazarbayev University, 2013) Akhmetbekov, Y.; Tosato, G.C.; Kerimray, A.; Ayashev, K.; Ibrayeva, A.; Bakdolotov, A.; Tokmurzin, D.; Kudaibergenov, A.The TIMES-Kazakhstan is a mono-regional energy system model of the Republic of Kazakhstan (the RoK), built using the MARKAL/TIMES tool. The main purpose of this three-year-project is qualitative and quantitative analysis of the energy system of Kazakhstan using environmental, economic and engineering measurements to assist decision makers in determining the effectiveness of policies and decision-makingItem Open Access Study and development of the technologies of renewable energy and smart grids for implementation in the Republic of Kazakhstan(Nazarbayev University, 2013) Bermukhambetova, A.; Khakimova, A.; Kusatayeva, A.; Uyzbayeva, A.; Sarbassov, D.; Sharipova, D.; Muratov, F.; Ibrayev, N.; Ten, V.; Syrgaliyev, Y.The results presented confirm the feasibility of the use of renewable energy sources in the environmental and weather conditions of Kazakhstan; they open new challenges and directions for further research in the area of energy-converting devices, integration into the main electricity grid, and data acquisition systems for renewable energy sources.Item Open Access Intelligent voice system for kazakh(Nazarbayev University, 2013) Yessenbayev, Zh.; Karabalayeva, M.; Sharipbayev, A.; Shamayeva, F.; Saparkhojayev, N.; Kalibekov, M.; Yapanel, U.The proposed project is dedicated to developing a prototype of an intelligent voice system with an interactive dialog mode in the Kazakh language for call-centers, information desks and dispatching services. Mathematical models and software of the system were developed. This includes the development of the algorithms of speech recognition and synthesis of words and phrases in Kazakh as well as the collection and processing of speech data for training and testing the system.Item Open Access Internet data accumulation and processing complex(Nazarbayev University, 2013) Makhambetov, O.; Makazhanov, A.; Yessenbayev, Z.; Matkarimov, B.; Sabyrgaliyev, I.; Sharafudinov, A.A language corpus is a collection of texts written in that language and classified by genres. Corpora are actively used by researchers from different fields (most notably linguists and computer scientists) and by industry (Google, Yandex, etc.)Item Open Access The complex of topological methods and algorithms applicable to data analysis(Nazarbayev University, 2013) Abzhanov, A.; Beketayev, K.; Taimanov, I.; Bazaikin, Ya.; Matkarimov, B.; Ikram, M.The main goal of the project is development of new algorithms in the field of topological data analysis and visualization. The abstract presents three new topological methods that allow to incorporate the geometrical information into visualization and representation of topology, and to evaluate the topological error in function approximations.Item Open Access Effect of molecular weight on the photovoltaic performance of a low band gap copolymer blended with ICBA(Nazarbayev University, 2013) Ibraikulov, O.; Bechara, R.; Leveque, P.; Leclerc, N.; Koishiyev, G.; Heiser, T.In this work we fabricated solar cells by combining ICBA as electron acceptor material with various weight fractions of a low band gap electron donor copolymer based on 2,1,3-benzothiadiazole, thiophene and thieno[3,2-b]thiophene units (labeled PPBzT2-CEHb), whose structure is given in Fig. 1 [1]. We investigated the influence of the polymer molecular weight and post-deposition annealing temperature on the solar device performances. Charge transport in pristine polymer films was also studied by measuring the field-effect hole mobility in bottom contact field-effect transistors (OFET).Item Open Access Simulation of stationary and dynamic responces of organic solar cells(Nazarbayev University, 2013) Aidarkhanov, D.; Raba, A.; Leroy, Y.; Cordan, A.-S.The model allowed distinguishing different regimes of the charge transport. It was shown that 2D time-dependent model can be applied to simulate transient photocurrent measurements in order to study sweep-out and recombination kinetics of the charges in the organic solar cells. The model can supply qualitative description of the transient processes in addition to the quantitative description of the simulated bulk heterojunction organic solar cells.