Suchergebnisse

Cloud Computing offers significant cost benefits for SMEs that often do not manage internal IT infrastructure and start-up companies that do not have their own IT infrastructure. This paper presents a total cost of ownership (TCO) approach for cloud computing services with an emphasis on the infrastructure as a service (IaaS) model. Also, the paper presents a methodology for estimating total cost of ownership (TCO) when running computer instances in the IaaS cloud using the GARCH model to predict transaction volatility. The research results show that it is possible to successfully use GARCH models when there is historical data on the number of transactions. In addition, simulation shows that, when there are large oscillations in the number of transactions, the best choice is to reserve instances according to the Partial-Upfront price model. In contrast, if the transaction number is relatively stable, the best choice is the All-Upfront model.

Taking into consideration the importance of information and communications technology in higher education both as part of the teaching and grading process, but also the limitations in its application in higher education in the Republic of Serbia, this paper outlines the possibilities which the Moodle platform offers for the definition and use of online self-assessment tests and quizzes in the preparation and simulation of the entrance exam for the Faculty of Economics of the University of Niš. To indicate the importance of egrading for the increase in the effectiveness of learning, the paper analyses the number of created accounts and the number of visits, while a statistical analysis of the candidates′ results on the simulated entrance exam, from 2014 to 2016, was used to test the hypothesis on the significance of formative assessment for effective learning. The obtained t-test results indicate that formative assessment in this specific instance contributes to the improvement of the candidates' learning process and that the application of such a means of student self-assessment in other areas of study would significantly contribute to the increase in the effectiveness of learning. On the other hand, statistical analyses of individual responses to questions represent a significant source of feedback for teachers, which can be used for the purpose of redefining tests.

Abstract
The topic of wealth and money distribution attracts great attention of economists, as well as researchers from other scientific fields, such as statistical physics and econophysics. An increasing number of models and simulations are being created in order to understand the process of wealth distribution and reaching the steady state of the distribution system. Also, the number of papers dealing with analysis and determining the distribution proportion is constantly growing, and, unlike the previous years, when the Pareto principle was "80-20", today that principle could be "90-10"and even "90-20". In this paper we present an agent-based simulation model derived from econophysics that describes the dynamics of wealth distribution. Two models of exponential function are tested: a one-phase model that uses the Newton's law of cooling and a two-phase exponential function model. We found that exponential decreasing function adequately described the dynamics of wealth distribution, especially in the models without the possibility of borrowing money, and the validity of the Pareto principle "80-20" in these models could be confirmed.

Currency substitution is widespread in less developed countries. Since it increases financial vulnerability and limits the effectiveness of monetary policy, it is often in the focus of scientists and experts. In this paper, we analyze the importance of euroization determinants in Serbia and neighboring countries - Albania, Bosnia and Herzegovina, FYR Macedonia, Romania and Croatia for the period 2003-2014. We examine the impact of domestic inflation, nominal exchange rate of the domestic currency against the euro, interest rate spread on domestic and foreign currency, foreign currency inflow in the form of foreign direct investments and exports, as well as the euroization of banks'financial resources on the degree of loan euroization. The results obtained by multiple regression panel methods confirm the statistical significance and assumed direction of the influence of all analyzed variables except inflation and current account balance.