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Wyświetlanie 1-15 z 1235
Tytuł:
An empirical evaluation of exchange rates changes: economic implications in oil-exporting countries
Empiryczna ocena zmian stopy wymiany walut i ich ekonomicznych implikacji w krajach eksportujących ropę naftową
Autorzy:
AbdulRahman, A.
Powiązania:
https://bibliotekanauki.pl/articles/2051471.pdf
Data publikacji:
2019
Wydawca:
Akademia Bialska Nauk Stosowanych im. Jana Pawła II w Białej Podlaskiej
Tematy:
exchange rate
spot exchange rate
fixed exchange rate
inflation rate
Opis:
Subject and purpose of work: This paper examines empirical implications of exchange rates in the economy of the Kingdom of Saudi Arabia (KSA). In particular, it aims to identify and evaluate potential macroeconomic signs and symptoms of economic disturbance so as to determine macroeconomic variables that influence spot exchange rate (1GBP = SAR), and to examine how fixed exchange rate regime influences exports and imports in the Kingdom of Saudi Arabia (KSA). Materials and methods: Multiple regression and simple linear regression models were used to analyze the data from 1975 to 2018. Results: The study found a weak and insignificant relationship between spot exchange rate and unemployment rate, inflation rate, exports, and economic growth, along with strong relations with imports, investment, and current account variation in the KSA. Conclusions: The study recommends the adoption of a floating exchange rate regime in the KSA. It has revealed the signs and symptoms of increases of the inflation rate with decreasing exports, increasing imports, decreasing of current account (current account deficit threat), and small increases of investment.
Przedmiot i cel pracy: W artykule przeprowadzono ocenę empiryczną implikacji zmian stopy wymiany walut w gospodarce Królestwa Arabii Saudyjskiej. Szczególnym celem artykułu jest identyfikacja i ocena potencjalnych sygnałów i symptomów makroekonomicznych zakłóceń w gospodarce i określenie makroekonomicznych zmiennych, które wpływają na stopę wymiany funta brytyjskiego na jednostkę waluty krajowej (1 GBP=SAR), a także dokonanie oceny w jakim stopniu system wymiany walut wpływa na rozmiary eksportu i importu Królestwa Arabii Saudyjskiej. Materiały i metody: W pracy zastosowano statystyczne modele regresji liniowej i metody regresji wielorakiej przy wykorzystaniu danych liczbowych za okres 1975-2018. Wyniki: W badaniach ujawniono słabe i mało znaczące powiązania między stopą wymiany waluty krajowej na waluty zagraniczne a stopą bezrobocia, stopą inflacji, wielkością eksportu, wzrostem ekonomicznym oraz silne relacje stopy wymiany walut na rozmiary importu, inwestycje oraz zmiany w bilansie obrotów bieżących Królestwa Arabii Saudyjskiej. Wnioski: Badania rekomendują stosowanie systemu zmiennej stopy wymiany walut w Królestwie Arabii Saudyjskiej. W wyniku badań zaewidencjonowano powiązane ze stopą wymiany walut sygnały i symptomy, takie jak: wzrost stopy inflacji, spadek eksportu, wzrost importu oraz powiększenie deficytu obrotów bieżących, a także spowolnienie procesów inwestycyjnych. Autorzy rekomendują wprowadzenie w Królestwie Arabii Saudyjskiej zmiennej stopy wymiany waluty krajowej wobec walut zagranicznych.
Źródło:
Economic and Regional Studies; 2019, 12, 2; 111-126
2083-3725
2451-182X
Pojawia się w:
Economic and Regional Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
ARTICULATION AND SPEAKING RATES IN BILINGUALS WITH REGARD TO TIME OF EXPOSURE TO ONE LANGUAGE
Autorzy:
Michalik, Mirosław
Czaplewska, Ewa
Solak, Anna
Szkotak, Anna
Powiązania:
https://bibliotekanauki.pl/articles/2137812.pdf
Data publikacji:
2020-05-13
Wydawca:
Fundacja Edukacji Medycznej, Promocji Zdrowia, Sztuki i Kultury Ars Medica
Tematy:
bilingualism
speaking rate
articulation rate
pauses
Opis:
The basic aim of the research presented in this paper was to check whether the language proficiency level of bilingual children with Polish as one of their languages is also related to the pace of speech, which is the result of two specific parameters i.e. articulation rate and speaking rate. It was assumed that children who use Polish more rarely and mostly at home will display slower speaking and articulation rates when contrasted with children who use Polish both at home and at school on an everyday basis. Participants were thirty-two children who speak Polish as one of two languages, the first research group consisting of sixteen Polish-French students at the age of 8.11 living in Wal-lonia. The second group consisted of sixteen Flemish-Polish students living in Flanders. Here the average age was 9.3 and subjects used Polish much less than their first group coun-terparts. The comparative analysis included the following parameters essential for the de-scription of the rate of speech: 1. basic: average speaking rate (phones/sec., syllables/sec, duration of pauses), average articulation rate (phones/sec., syllables/sec.), average ratio of pauses in speech sample (number and percentage), 2. accessory: average duration of all pauses (sec.), average duration of proper pauses (sec.), average duration of filled pauses (sec.), average duration of semi-filled pauses (sec.). The numerical data from the research was obtained with the use of free Audacity software. The results showed that there were no statistically significant differences between the two research groups in either the basic or the accessory speech rate parameters. In the Polish-French group the results were comparatively better but still statistically insignificant. It seems that the data obtained will confirm the need for considerable caution in the evalua-tion of the competence of bilingual children with high language skills. Similar to children with imbalanced bilingualism, these children may also, perhaps, require some extra time to deal with certain language tasks.
Źródło:
Acta Neuropsychologica; 2020, 18(2); 207-220
1730-7503
2084-4298
Pojawia się w:
Acta Neuropsychologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Safety Performance Factor
Autorzy:
Venkataraman, N.
Powiązania:
https://bibliotekanauki.pl/articles/90142.pdf
Data publikacji:
2008
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
frequency rate
severity rate
accident
human-hours
Opis:
Workplace safety performance is computed using frequency rate (FR) and severity rate (SR). Only work time lost due to occupational incidents that need to be reported is counted. FR and SR are the 2 most important safety performance indicators that are applied universally; however, calculations differ from country to country. All injuries and time lost should be considered while calculating safety performance. The extent of severity does not matter as every incident is counted. So, a new factor has to be defined; it should be based on the hours or days lost due to each occupational incident, irrespective of its severity. The new safety performance factor is defined as the average human-hour unit lost due to occupational accidents/incidents, including fatalities, first-aid incidents, bruises and cuts. The formula is simple and easy to apply.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2008, 14, 3; 327-331
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design and Modeling of an Experimental Hydraulic Device
Autorzy:
Tkáč, Z.
Halenár, M.
Kosiba, J.
Powiązania:
https://bibliotekanauki.pl/articles/2065018.pdf
Data publikacji:
2018
Wydawca:
STE GROUP
Tematy:
hydraulic fluid
flow rate
flow rate efficiency
Opis:
The design of the experimental laboratory device is based on the construction of the hydraulic circuits of mobile devices. It is possible to ensure the repeatability of the flow characteristic measurements at the laboratory. This means that in the operating test it is possible to verify the flow characteristics of the hydraulic pump and these results are not affected by the change in the physical properties of the applied liquid. By comparing of the flow characteristics directly on the work equipment (mini-excavator, etc.), the disadvantage is the need for dismantling the hydraulic pump and its mounting on the laboratory device. In some working device removal is not possible, where dismantling is structurally difficult or is time consuming, which increases the cost of their operation.The proposed experimental laboratory device serves to verify the flow characteristics of the hydraulic pump and is also designed to be universal, to test external gear hydraulic pump and hydraulic pump with inclined plate.
Źródło:
Multidisciplinary Aspects of Production Engineering; 2018, 1, 1; 63--68
2545-2827
Pojawia się w:
Multidisciplinary Aspects of Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Radon emission rate and analysis of its influencing parameters
Autorzy:
Neugebauer, T.
Hingmann, H.
Buermeyer, J.
Grimm, V.
Breckow, J.
Powiązania:
https://bibliotekanauki.pl/articles/147494.pdf
Data publikacji:
2016
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
air change rate
radon emission rate
radon entry rate
radon exposition
window function
Opis:
The geological and structural conditions define the radon situation inside a building. While the geological realities can be specified by the content of radium-226 and the ratio of radon-222 emitted from the ground the structural conditions are defined by the tightness of the building envelope. The radon concentration inside has an unsteady character, which is caused by meteorological conditions outside and the air change rate (ACH or ACR), which in turn is influenced by the residents’ behaviour such as venting and heating. For the assessment of the radon exposition, it is necessary to perform measurements for a long time. An approach to reduce this time by eliminating the inhabitants influence on the radon concentration is the radon emission rate, also known as radon entry rate. This variable is based on the measurement of the radon concentration and the parallel determination of the air change rate via a tracer gas method, the result expresses a released activity per time. Due to their noisy character, it is necessary to apply a smoothing algorithm to the input parameters. In addition to mean values, the use of window functions, known from digital signal processing, was analysed. For the verification of the whole calculation procedure, simulations and measurements under defined conditions were used. Furthermore, measurements in an uninhabited house showed proof of the capability of the assessment of the radon potential. First examinations of influencing parameters of the radon emission rate showed a possible dependence on the temperature difference inside and outside the building.
Źródło:
Nukleonika; 2016, 61, 3; 337-342
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Radon and thoron exhalation rate measurements from building materials used in Serbia
Autorzy:
Čeliković, Igor T.
Pantelić, Gordana K.
Živanović, Miloš Z.
Vukanac, Ivana S.
Krneta Nikolić, Jelena D.
Kandić, Aleksandar B.
Lončar, Boris B.
Powiązania:
https://bibliotekanauki.pl/articles/148848.pdf
Data publikacji:
2020
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
air exchange rate
building materials
radon exhalation rate
Opis:
The second most important source of indoor radon, after soil beneath dwelling, is building material. With the increase in environmental awareness and new energy-saving policies, residents tend to replace the existing windows with tighter windows, which leads to a decrease in air exchange rate and consequently an increase in indoor radon concentration. In case of low exchange rates, dose caused by inhalation of radon and its progeny can exceed external dose originating from the radium content in the surrounding building material. In this paper, surface exhalation rates of radon (222Rn) and thoron (220Rn) from typical building materials used for construction and interior decoration of houses in Serbia were investigated. Surface exhalation rate measurements were performed using the closed-chamber method, while concentrations of radon and thoron in the chamber were continuously measured using an active device, RTM1688-2, produced by SARAD® GmbH. Finally, the impact of the replacement of windows on the indoor radon concentration was estimated.
Źródło:
Nukleonika; 2020, 65, 2; 111-114
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
THE APPLICATION OF REGRESSION ANALYSIS IN TESTING UNCOVERED INTEREST RATE PARITY
Autorzy:
Kisielińska, Joanna
Czech, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/453467.pdf
Data publikacji:
2013
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Katedra Ekonometrii i Statystyki
Tematy:
uncovered interest rate parity
exchange rate
linear regression model
Opis:
The aim of the paper is to evaluate and compare two linear regression models proposed by Froot and Frankel (1989) and to show their application in verification of the uncovered interest rate parity (UIP) hypothesis in the selected ten exchange rate markets. The paper shows that both models proposed by Froot and Frankel (1989) are formally equivalent, but they may give different regression results. Many researchers claim that uncovered interest rate parity tends to hold more frequently in emerging markets than in developed economies. The paper is focused on five developed and five emerging economies. It is partly confirmed that developing countries work better in terms of UIP.
Źródło:
Metody Ilościowe w Badaniach Ekonomicznych; 2013, 14, 1; 232-242
2082-792X
Pojawia się w:
Metody Ilościowe w Badaniach Ekonomicznych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Deglaciation rate on southern and western Spitsbergen in the conditions of Arctic amplification
Autorzy:
Szafraniec, Joanna Ewa
Powiązania:
https://bibliotekanauki.pl/articles/2042121.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Arctic
Svalbard
recession rate
acceleration of deglaciation rate
GIS
Źródło:
Polish Polar Research; 2018, 39, 1; 77-98
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biuret: a Potential Burning Rate Suppressant in Ammonium Chlorate(VII) Based Composite Propellants
Autorzy:
Dey, A.
Ghorpade, V. G.
Kumar, A.
Gupta, M.
Powiązania:
https://bibliotekanauki.pl/articles/358579.pdf
Data publikacji:
2014
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
burning rate suppressants
biuret
burning rate
HTPB
composite propellant
Opis:
Several composite propellant compositions containing various concentrations of biuret, a new burning rate suppressant, were formulated and studied to optimize the concentration of biuret in the composite propellant. Biuret was used here for the first time in a composite propellant as a burning rate suppressant. The theoretical properties of the compositions containing different concentrations of biuret were computed by using the NASA CEC-71 programme and the burning rate performances were evaluated. In addition, the sensitivity, thermal and mechanical properties of the compositions were also evaluated. The composition containing ammonium chlorate(VII) (AP) 65%, Al 15%, binder 20% and biuret 0-6% over the batch were prepared. The composition containing 6% biuret over the batch was insensitive to friction and impact. As the amount of biuret was increased, the energy, burning rate and sensitivity decreased, whilst the auto ignition temperature increased. The formulation containing 4% biuret over the batch was found to be the optimum with respect to energy, burning rate, pressure index, and sensitivity.
Źródło:
Central European Journal of Energetic Materials; 2014, 11, 1; 3-13
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Employment of Foreigners in Poland and the Labour Market Situation
Autorzy:
Duszczyk, Maciej
Matuszczyk, Kamil
Powiązania:
https://bibliotekanauki.pl/articles/498569.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
labour migration
Polska
unemployment rate
employment rate
economic inactivity
Opis:
Between 2014 and 2016 the number of foreigners on the Polish labour market increased by over 300 per cent. They were mainly Ukrainian citizens taking up seasonal employment on the basis of the so-called ‘simplified system’. According to the literature, such a large increase in labour immigration in a short period of time may be an important factor in the growth of unemployment and the reduction of the employment rate of natives. The main purpose of this text is to show the correlation between the increase in the employment of foreigners in Poland and to determine whether or not this has had an impact on the deterioration of the state of the labour market. For this purpose, data from the Central Statistical Office and the Polish Ministry of Family, Labour and Social Policy were collected. As a result of our analysis, it was found that the significant increase in the presence of foreigners on the Polish labour market, which the country has faced in recent years, was not correlated with the rise in unemployment, the increase in the rate of economic inactivity and the availability of seasonal jobs. On this basis, we can state that the increase in the supply of foreigners on the Polish labour market, compared to other factors influencing it, was weak enough for the negative effects of the increased employment of foreigners to not occur.
Źródło:
Central and Eastern European Migration Review; 2018, 7, 2; 53-68
2300-1682
Pojawia się w:
Central and Eastern European Migration Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Quantitative OHS evaluation : RATE procedure compared with traditional reliability methodologies
Autorzy:
Pantanali, C.
Bianco, C.
Powiązania:
https://bibliotekanauki.pl/articles/2069678.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
RATE
SME
OHS
Opis:
The most careful and consolidated risk analysis methods, as FTA, ETA, FMEA/FMECA, focus attention on system reliability. But, looking at OHS, a deep analysis on European data on accidents at work and on work environment in general, shows how reliability is only one aspect of safety problem. These methods then are hardly adaptable when the main aim is to obtain a quantitative assessment of risk for workers; besides, Rother methodologies are nearest to OHS but give only qualitative results like HAZOP, or base their analysis on notdimensional values, fixed by analyst on personal experiences, like methods proposed by UNI EN 1050, by standard MIL-STD-882c and by AISS. RATE is proposed as a new quantitative methodology for OHS, particularly dedicated to SMEs considered as the most interesting from these aspect. The paper compares hypothesis and procedures which traditional quantitative methodologies and RATE are based on, to give evidence at the main approach aspects that have to be modified in order to move from reliability to OHS.
Źródło:
Journal of Polish Safety and Reliability Association; 2009, 2; 345--352
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Exchange rate volatility and trade. The case of Ukraine
Autorzy:
Popova, Olga
Jablinski, Jörg
Lukashenko, T.
Powiązania:
https://bibliotekanauki.pl/articles/692551.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Ekonomiczny w Poznaniu
Tematy:
volatility
trade
exchange rate
transitional economies
international transactions
growth rate
Opis:
This article demonstrates the assumptions of economic theory and its followers, the theories which stimulate research on the positive correlation between the success of the economy, its growth and the level of international trade. The empirical analysis of this paper examines the example of the exchange rate volatility and its influence on international trade on the basis of Ukraine. In the descriptive part of this study, which looks at the exchange rate volatility in Ukraine as a whole, the authors have aggregated the bilateral volatilities using trade shares as weights to obtain what is referred to as the “effective volatility” of the country’s exchange rates. It is summarized that the current situation in Ukraine is extremely difficult, and external financial support could alleviate the crisis. The time span used in the work includes the years from 1999 to 2014, with the help of which the authors have demonstrated the fluctuation and correlation between these two factors. From the graph it has been possible to make the conclusion that even if there was no significant visible correlation between trade and the exchange rate volatility, it does not mean that there is no relationship between these two factors, because there are a lot of factors which affect the level of trade.
Źródło:
Research Papers in Economics and Finance; 2016, 1, 1; 17-24
2543-6430
Pojawia się w:
Research Papers in Economics and Finance
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A note on failure rate of the mixture of an exponential distribution and distribution with increasing quadratic failure rate function
Autorzy:
Knopik, L.
Powiązania:
https://bibliotekanauki.pl/articles/206455.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
mixture of distributions
quadratic failure rate function
failure rate function
Opis:
We show that a unimodal failure rate function can be obtained as a mixture of two increasing failure rate functions. Specifically, we study the failure rate of the mixture of an exponential distribution and an IFR (increasing failure rate) distribution with increasing quadratic failure rate function. At the end of the paper we show a numerical example of the modified unimodal failure rate function.
Źródło:
Control and Cybernetics; 2017, 46, 3; 291-297
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of Exchange Rate on Economic Growth in Sri Lanka
Autorzy:
Aslam, A. L. Mohamed
Powiązania:
https://bibliotekanauki.pl/articles/1191250.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Exchange rate
Economic growth
Interest rate
Colombo Consumer Price Index
Opis:
Exchange rate is identified as a factor for turning vector of the economic growth of countries which was empirically confirmed by several related studies. But in Sri Lankan context it was not confirmed. Therefore, the objective of this study was to test the impact of exchange rate on the economic growth in Sri Lanka. To achieve this objective, the annual time series data from 1970 to 2015 were used and the variables such as gross domestic product, exchange rate, inflation rate, and interest rate were considered and the multiple regressions model using Ordinary Least squared method was employed. Based on the outcome of the multiple regression model, this study confirmed that the exchange rate positively influenced on the economic growth in Sri Lanka at one percent significant level.
Źródło:
World Scientific News; 2016, 54; 252-266
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A study of the Inverse Gaussian Process with hazard rate functions-based drifts applied to degradation modelling
Autorzy:
Rodríguez-Picón, Luis Alberto
Méndez-González, Luis Carlos
Pérez-Olguín, Iván JC
Hernández-Hernández, Jesús Israel
Powiązania:
https://bibliotekanauki.pl/articles/2175136.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
inverse Gaussian process
hazard rate function
degradation rate
variable drift
Opis:
The stochastic modelling of degradation processes requires different characteristics to be considered, such that it is possible to capture all the possible information about a phenomenon under study. An important characteristic is what is known as the drift in some stochastic processes; specifically, the drift allows to obtain information about the growth degradation rate of the characteristic of interest. In some phenomenon’s the growth rate cannot be considered as a constant parameter, which means that the rate may vary from trajectory to trajectory. Given this, it is important to study alternative strategies that allow to model this variation in the drift. In this paper, several hazard rate functions are integrated in the inverse Gaussian process to describe its drift in the aims of individually characterize degradation trajectories. The proposed modelling scheme is illustrated in two case studies, from which the best fitting model is selected via information criteria, a discussion of the flexibility of the proposed models is provided according to the obtained results.
Źródło:
Eksploatacja i Niezawodność; 2022, 24, 3; 590--602
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 1235

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