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Almaty, Kazakhstan

Kazack-British Technical University, or KBTU is a research and educational institution located in Almaty, Kazakhstan. Founded in 2001, KBTU is one of the most prestigious research and education institutions in the region. Wikipedia.

Poulopoulos S.G.,Kazakh-British Technical University
Reaction Kinetics, Mechanisms and Catalysis

The catalytic oxidation of ethanol in the gas phase over Pt/Rh and Pd monolithic catalysts was performed in a spinning basket flow reactor with the aim of studying kinetics. The reactor was operated under atmospheric pressure and reaction temperature was varied between 50 and 300 °C. The inlet concentrations of ethanol and oxygen were in the range of 0.0060-0.0240 μmol/mL and 0.10-10.0 % v/v, respectively. Gas chromatography was used to follow the progress of the oxidation. Carbon dioxide and small amounts of methane and acetaldehyde were the only products detected in ethanol oxidation over the catalysts tested. Various kinetic models were tested in the analysis of the experimental data obtained. The Marquardt-Levenberg method was used for the minimization of the objective function for the residual sum of squares. The model that takes into account the surface reaction between adsorbed reactants was found to yield the most successful fit for both catalysts. According to this model, the activation energy of ethanol catalytic oxidation over Pt/Rh and Pd is 7903 and 6571 cal mol-1, respectively. © Akadémiai Kiadó, Budapest, Hungary 2015. Source

Narbaev T.,Kazakh-British Technical University | Narbaev T.,Polytechnic University of Turin | De Marco A.,Polytechnic University of Turin
Journal of Construction Engineering and Management

To improve the accuracy of early forecasting the final cost at completion of an ongoing construction project, a new regression-based nonlinear cost estimate at completion (CEAC) methodology is proposed that integrates a growth model with earned schedule (ES) concepts. The methodology provides CEAC computations for project early-stage and middle-stage completion. To this end, this paper establishes three primary objectives, as follows: (1) develop a new formula based on integration of the ES method and four candidate growth models (logistic, Gompertz, Bass, and Weibull), (2) validate the new methodology through its application to nine past projects, and (3) select the equation with the best-performing growth model through testing their statistical validity and comparing the accuracy of their CEAC estimates. Based on statistical validity analysis of the four growth models and comparison of CEAC errors, the CEAC formula based on the Gompertz model is better-fitting and generates more accurate final-cost estimates than those computed by using the other three models and the index-based method. The proposed methodology is a theoretical contribution towards the combination of earned-value metrics with regression-based studies. It also brings practical implications associated with usage of a viable and accurate forecasting technique that considers the schedule impact as a determinant factor of cost behavior. © 2014 American Society of Civil Engineers. Source

Bruggemann R.,Leibniz Institute of Freshwater Ecology and Inland Fisheries | Carlsen L.,Awareness Center | Carlsen L.,Kazakh-British Technical University

Comparison of objects characterized by a multitude of criteria will typically not lead to a linear order, but to a partial order. However, often a linear order is desirable or even required. The present paper presents an improved - extended - approximate local partial order model to estimate a weak or linear order based on averaged ranks of the studied objects originally being partially ordered. The paper analyses various possible partial order scenarios by means of the new local partial order model, the results being compared to the original approach as well as to exact values (their calculation can be extremely time consuming), demonstrating a distinct improvement of the extended method compared to the original local partial order ranking method. By the approximate methods the values of averaged ranks can be understood in terms of three basic partial order parameters. The method is applied to current research on human health effects of rocket fuel transformation products. Source

Trubitsin O.,Kazakh-British Technical University
Communications in Computer and Information Science

With the growing popularity of cloud computing and large number of providers, it is necessary to select the most appropriate service. To select a suitable provider the user needs to browse a huge list of providers. To solve this problem, the customer can use a third-party service called a cloud broker. One of the problem we faced during the developing cloud broker framework is a lack of API standards. Every provider has its own protocol for deploying services. This paper describes a new approach to construct a protocol for communication between the client and the provider. It is based on the use of mediators, which, depending on the selected service capable to convert messages from a format of one particular provider to a format of another provider. All the processes described in a specific example of Google Compute Engine client and Digital Ocean server interactions for deploying the service. In addition, during the development of mediators was introduced a new operator “sync” to synchronize the set of answers to one. © Springer International Publishing Switzerland 2015. Source

Bruggemann R.,Leibniz Institute of Freshwater Ecology and Inland Fisheries | Carlsen L.,Awareness Center | Carlsen L.,Kazakh-British Technical University
Science of the Total Environment

The paper of Huang, Keisler and Linkov (HKL) (Huang et al., 2011) has motivated us to this note about the relation between ranking procedures and Multi-Criteria Decision Analysis (MCDA) tools. The key concept in the HKL-paper is in our eyes the 'trade-off'. A 'trade-off' seems necessary, when conflicting indicator values are present. HKL stress that the general application of MCDA is hampered by different terminology. We do not claim to have a solution for that problem. Nevertheless, we think that the discussion is worthwhile and this note presents some of our ideas, which basically imply the need of a broadening of the definition of MCDA. © 2012 Elsevier B.V. Source

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