THE EMPIRICAL STUDY OF THE RELATIONSHIP BETWEEN EXCHANGE RATE FLUCTUATIONS AND ECONOMIC GROWTH

Abstract. The study of causes and factors of growth has always been of particular interest to economistsand several growth models have been designed for it. In theoretical and empirical models, several explanatory variables explain the economic growth. The purpose of many of the empirical studies on economic growth is to determine the importance of the effect of one or a set of explanatory variables on economic growth. On the one hand, exchange rate fluctuations and changes in the value of the national currency against foreign currency are so important that international monetary and financial institutions, especially the IMF, emphasize the need to pay attention to this variable and always recommend interference in the foreign exchange market to reduce fluctuations. Therefore, the present study tries to examine the relationship between exchange rate and its fluctuations, foreign direct investment,exports and imports with economic growth. The implementation of this study as a case study will be at the level of the Iranian economy, and therefore the available data from 2006 to 2015 comprises its community and its statistical sample. Multivariate linear regression model has been used to test the hypotheses in this study. The results of the study indicate that: (1) exchange rate fluctuations have an adverse effect on economic growth; (2) direct foreign investment has a direct effect on economic growth; (3) foreign exchange does not affect economic growth; (4) exports has a direct impact on economic growth; and (5) imports do not affect economic growth.Keywords: exchange rate fluctuations, foreign direct investment, foreign exchange rate, exports, imports,economic growth

Numerical assessments of a nonintrusive surrogate model based on recurrent neural networks and proper orthogonal decomposition: Rayleigh Benard convection

Recent developments in diagnostic and computing technologies offer to leverage numerous forms of nonintrusive modeling approaches from data where machine learning can be used to build computationally cheap and accurate surrogate models. To this end, we present a nonlinear proper orthogonal decomposition (POD) framework, denoted as NLPOD, to forge a nonintrusive reduced-order model for the Boussinesq equations. In our NLPOD approach, we first employ the POD procedure to obtain a set of global modes to build a linear-fit latent space and utilize an autoencoder network to compress the projection of this latent space through a nonlinear unsupervised mapping of POD coefficients. Then, long short-term memory (LSTM) neural network architecture is utilized to discover temporal patterns in this low-rank manifold. While performing a detailed sensitivity analysis for hyperparameters of the LSTM model, the trade-off between accuracy and efficiency is systematically analyzed for solving a canonical Rayleigh-Benard convection system

Применение технологий управления знаниями в гостиничном бизнесе

Знания - чрезвычайно важный фактор развития человеческого потенциала, а в условиях организации он превращается в весьма значимый ресурс, связанный с персоналом. В статье рассматриваются вопросы применения технологий управления знаниями в современных экономических условиях. Проанализировано понятие "управление знаниями". Определены основные препятствия к извлечению знаний и технологии, обеспечивающие процесс управления знаниями в гостиничном предприятии.Knowledge is an extremely important factor in the development of human potential, and in terms of organization it becomes a very significant resource, I swear with the staff. The article deals with the use of control technologies in modern economic conditions. The concept of "knowledge management" is analyzed. There are identified the main obstacles to the extraction of knowledge and technology that ensure the process of management in a hotel enterprise

Combining Fuzzy MCDM with BSC Approach in Performance Evaluation of Iranian Private Banking Sector

The objective of this study is to construct an approach based on multiple criteria decision making (MCDM) and balanced scorecard (BSC) for evaluating performance for three nongovernmental Iranian's banks. Following the literature relating to banking performance and BSC concepts, experts and managers select 21 indexes for evaluation. Furthermore, fuzzy analytic hierarchy process (FAHP) calculated the relative weights of each chosen index in order to tolerate vagueness and ambiguity of information, and three MCDM analytical tools (TOPSIS, VIKOR, and ELECTRE) were adopted to rank the banking performance. The results indicate that a customer “” has the most significant BSC perspectives and the customer satisfaction “1” is the most major index in banking sector. This proposed fuzzy MCDM method combined with BSC approach is a comprehensive and up-to-date model that can be a useful and effective assessment tool

Tensile strength and impact strength of color modified acrylic resin reinforced with titanium dioxide nanoparticles

Poor mechanical properties are among the main limitations of acrylic resins. Addition of titanium dioxide (TiO2) nanoparticles to acrylic resin has been shown to improve its mechanical properties with an adverse effect on its color. Thus, this study sought to assess the tensile and impact strength of a color modified heat cure acrylic resin reinforced with TiO2 nanoparticles. In this in vitroexperimental study, 1wt% TiO2 nanoparticles were added to SR Triplex Hot heat-cure acrylic resin powder and mixed. Pigments and color fibers were also added and 18 samples were fabricated of this paste for tensile and impact strength testing (n=9) according to ISO5271. Eighteen control samples were also fabricated from the acrylic powder without any modification. Independent t-test was used for data analysis (P< 0.05). The mean tensile strength of the reinforced group was found to be significantly higher (difference of 11 MPa) than that of the control group (P=0.001). The mean impact strength of the reinforced group was 7 MPa higher than that of the control group and this difference was statistically significant as well (P=0.001). The color modified acrylic resin reinforced with 1wt% TiO2 showed significantly higher tensile and impact strength compared to the conventional acrylic resin. Thus, TiO2 nanoparticles may be incorporated into color-modified acrylic resin powder to enhance its tensile and impact strength, given that they have no adverse effect on other properties

EXPERIMENTAL STUDY ON HEAVE AND PITCH MOTION CHARACTERISTICS OF A WAVE-PIERCING TRIMARAN

Dynamic behaviour of a trimaran vessel is investigated in this study. The body of the trimaran is composed of a centre hull with a quite slender wave piercing bow profile (a length-to-width ratio of 12.96) and two outriggers with Wigley mathematical body forms. Several seakeeping tests are conducted on the model of the trimaran vessel in a towing tank in order to study its heave and pitch motions at different Froude numbers of 0.2, 0.37, and 0.51. Generated waves in the towing tank are of regular type with the wave length changing from 0.6 m to 2.4 m by an increment of 0.3 m. Amplitude of the waves is equal to either 25 mm or 35 mm. A resonance peak can be detected on the curve of the heave response amplitude operator (RAO) versus nondimensional wave length of around 1.0. Increasing the Froude number leads to rapidly descending post-resonance-peak regions of the heave RAO-nondimensional wave frequency diagrams. Changes in the value of the pitch RAO versus nondimensional wave lengths of less than 0.8 are not so sensitive to the changes in the values of Froude number and wave amplitude. Also, for the values greater than 2.5 to 2.8 of the nondimensional wave frequency, the pitch RAO does not experience any significant changes as a result of variations in the Froude number or wave amplitude