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Wyświetlanie 1-15 z 28
Tytuł:
Dynamics of radon and its decay products inside an accumulative chamber
Autorzy:
Yakovleva, V. S.
Powiązania:
https://bibliotekanauki.pl/articles/148846.pdf
Data publikacji:
2010
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
radon
thoron
accumulative chamber
ionizing radiation yield
ion production rate
Opis:
The calculations of radon and its decay products accumulation dynamics inside a chamber designed for measurements of radon flux density from the soil surface were carried out in the present work. Dynamics of alpha-,beta-particles and gamma-ray yields under decay of accumulated radionuclide nuclei was calculated based on the accumulated activity. Ion production rate inside the accumulative chamber due to ionizing radiation of different types was estimated. Thoron and its decay products accumulation regularities inside the accumulative chamber were also estimated and potential effect of thoron on measurement results (if counting regime is used) was analyzed in detail. Dynamic equations of the studied radiation characteristics, their solutions and obtained results analysis are presented.
Źródło:
Nukleonika; 2010, 55, 4; 595-600
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A three level integrated inventory model with time dependent demand and production rate under a trade credit policy for both distributor and retailer
Autorzy:
Singh, N.
Vaish, B.
Singh, S. R.
Powiązania:
https://bibliotekanauki.pl/articles/206192.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
time dependent demand
variable production rate
three echelon supply chain
trade credit
Opis:
This paper develops a three echelon supply chain inventory model with permissible delay in payment, in which distributor and retailer’s demand is time dependent and production rate for manufacturer is also time sensitive. The models consider the two level trade credit policy in manufacturer-distributor and distributor-retailer relationship in this supply chain model. A simple solution algorithm is presented to determine the optimal order quantity and optimal cycle time of the total cost function and the number of shipments for distributor and retailer. The results are discussed with numerical examples and the particular cases of the model are also discussed in brief.
Źródło:
Control and Cybernetics; 2014, 43, 3; 439-469
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prediction of performance of diamond wire saw with respect to texture characteristics of rock
Prognozowanie wydajności pracy strunowej piły diamentowej w odniesieniu do charakterystyki tekstury skał
Autorzy:
Ghaysari, N.
Ataei, M.
Sereshki, F.
Mikaiel, R.
Powiązania:
https://bibliotekanauki.pl/articles/220178.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
strunowa piła diamentowa
wydajność pracy
tekstura
diamond wire saws
production rate
texture coefficient
Opis:
In this study, prediction of production rate in diamond wire saw has been investigated. Performance measurements of diamond wire saw carried out in 7 different quarries of carbonate rocks in Iran. For determination textural properties, rock samples were collected from these quarries. At first, a thin section was prepared for each rock and then 5 digital photographs were taken from each section. After this, all images were digitized using AutoCAD software. Then, area, perimeter, longest diameter and shortest diameter were assigned. According to these parameters, all of the other textural characteristics and texture coefficient were determined too. The correlation between sawing rate and textural characteristics were evaluated using multiple and simple regression analyses. Then developed model was validated by P-value test. It was concluded that area, perimeter, diameter equivalent and index of grain size homogeneity are very effective on production rate. Production rate using diamond wire saw can reliably be predicted using developed model.
W pracy prognozowano wydajność pracy strunowej piły diamentowej. Badania wydajności prowadzono w 7 kamieniołomach na terenie Iranu, w których wydobywane są skały węglanowe. W celu określenia tekstury skał zebrano próbki wszystkich skał wydobywanych w kamieniołomach. Przygotowano zgłady i wykonano 5 fotografii cyfrowych każdej analizowanej próbki. Uzyskane obrazy poddano następnie obróbce cyfrowej przy użyciu oprogramowania AutoCAD. Określono następujące parametry: powierzchnia, obwód, najdłuższa i najkrótsza średnica. W oparciu o powyższe parametry przeprowadzono analizę tekstury i wyznaczono odpowiednie współczynniki. Korelację pomiędzy wydajnością pracy piły a właściwościami powierzchni (teksturą) określono przy użyciu prostej regresji liniowej oraz regresji wielokrotnej. Otrzymany model poddano następnie walidacji przy pomocy odpowiednich testów statystycznych. Stwierdzono, że pole powierzchni, obwód, równoważne średnice oraz wskaźnik jednorodności uziarnienia mają wpływ na wydajność pracy piły. Opracowany model może być skutecznie wykorzystywany dla wiarygodnego prognozowania postępu prac prowadzonych z wykorzystaniem piły diamentowej.
Źródło:
Archives of Mining Sciences; 2012, 57, 4; 887-900
0860-7001
Pojawia się w:
Archives of Mining Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of various mining equipment used for roadway development in coal mines
Ocena efektywności specjalistycznego sprzętu górniczego używanego do drążenia chodników w kopalniach węgla
Autorzy:
Su, Okan
Powiązania:
https://bibliotekanauki.pl/articles/219303.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
wydajność produkcji
tempo penetracji skał
prace strzałowe
wyrobiska skalne
drążenie tuneli
production rate
penetration rate
blasthole drilling
mine roadway
rock excavation
Opis:
This study attempts to evaluate the field performance of various mining equipment used at the development galleries of coal mines. These are hand-held and jumbo rock drills, and a road header used in mechanical excavation. For this purpose, the penetration rates of rock drills were monitored and measured in the field. The physical, mechanical, and drillability properties were determined through the collected samples in order to understand the complex interactions between the rock and bit/pick. The abrasive mineral content was also analyzed with XRD analysis to examine the wear on the cutting/drilling tools. Besides, the specific energy of the equipment was calculated relying on the operational parameters. A comparison of the monthly advance and production rates of the drilling rigs and roadheader was made. The relations among operating power, specific energy, and design of buttons/picks were investigated. It has been found that the average advance and production rates of the mining equipment are consistent with the penetration rate. The results verified that the roadheader used in mechanical excavation and the jumbo drill used in drilling and blasting technique are the machines maximizing the advance and production rates.
W artykule podjęto próbę oceny efektywności pracy sprzętu górniczego rozmaitego typu, wykorzystanego do drążeniach chodników w kopalniach węgla, np. wszelkiego rodzaju urządzeń wiertniczych od wiertarek ręcznych po wozy wiertnicze oraz urządzenia do drążenia tuneli i wyrobisk. W tym celu monitorowano i mierzono skuteczność i tempo penetracji skał przy użyciu urządzeń ręcznych oraz wozów wiertniczych w warunkach terenowych. Własności fizyczne, mechaniczne oraz urabialność skał określano na podstawie badania zebranych próbek, co umożliwia pełniejsze zrozumienie złożonych oddziaływań pomiędzy skałą a wiertłem/ końcówką. Zawartość substancji ściernych określono w oparciu o metodę analizy rentgenowskiej dyfrakcyjnej (XRD) i na tej podstawie określano zużycie narzędzi wiertniczych i urabiających. Poziom energii rozporządzalnej obliczono w oparciu o parametry eksploatacyjne sprzętu. Porównano miesięczne wyniki postępu i wydajności pracy poszczególnych urządzeń wiertniczych i urządzenia do drążenia tuneli. Zbadano zależności pomiędzy wydajnością roboczą i energią rozporządzalną a konstrukcją końcówek odpowiednich narzędzi. Stwierdzono że średni postęp i średnia wydajność robocza urządzeń idą w parze z tempem wnikania (penetracji skał). Uzyskane wyniki potwierdziły, że maksymalny postęp pracy i wydajność produkcji osiągnąć można dzięki zastosowaniu urządzenia do drążenia tuneli wykorzystywanego do drążenia wyrobisk, wozów wiertniczych do prac otworowych oraz technik strzałowych.
Źródło:
Archives of Mining Sciences; 2019, 64, 4; 797-812
0860-7001
Pojawia się w:
Archives of Mining Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of a detailed kinetic model of natural gas combustion in IC engine
Autorzy:
Mansha, M.
Saleemi, A.R.
Javed, S.H.
Feroz, N.
Powiązania:
https://bibliotekanauki.pl/articles/779291.pdf
Data publikacji:
2011
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
analiza wrażliwości
model
analiza produkcji
sensitivity analysis
models
rate of production analysis
Opis:
Detailed kinetic models are important to describe the oxidation of hydrocarbon fuels. In the present study, a detailed kinetic models has been developed to simulate the combustion of natural gas in IC engine. The proposed models consists of 208 elementary reactions and 72 species. The rate of the production and sensitivity analysis of the proposed reaction models were carried out to visualize the effect of reactions on the formation of various pollutants. In the rate of production analysis, an absolute rate of production coefficients and the normalized rate of production coefficients were calculated for the reactions involved in the formation of pollutant species (CO, NO, NO2, & NH3). In sensitivity analysis, normalized logarithmic sensitivity coefficients were determined the reactions of rates affects the output concentrations of the pollutant species. These two analysis were carried out for two temperatures ranges i.e. 1500 °C and 4000 °C under stoichiometric conditions (when φ=1.0).
Źródło:
Polish Journal of Chemical Technology; 2011, 13, 1; 6-15
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Indebtedness among farmers in Haryana state, India
Zadłużenie wśród rolników w stanie Hariana w Indiach
Autorzy:
Jakhar, B.
Kait, R.
Powiązania:
https://bibliotekanauki.pl/articles/2048609.pdf
Data publikacji:
2021
Wydawca:
Akademia Bialska Nauk Stosowanych im. Jana Pawła II w Białej Podlaskiej
Tematy:
spices
area
production
productivity
compound growth rate
Opis:
Subject and purpose of work: The study aims to evaluate the growth performance of spice crops in Haryana state of India. Materials and methods: The study is based on secondary data obtained over the period of 17 years i.e., from 2001-2002 to 2017-2018. Four spice crop – ginger, turmeric, garlic and fenugreek were selected from rabi and kharif season on the basis of the largest area sown. In order to analyze the data descriptive statistics (mean and C.V.) and CGR (compound growth rate) were employed. Results: The study revealed a significant positive growth rate of 2.20%, 4.50% and 2.20% in the area, production and productivity of ginger in the district of Panchkula, respectively. In the district of Yamunanagar, a growth rate 13.80% and 10.20% was found in the area and production of turmeric. However, a negative productivity growth rate of -3.20% was also revealed. A positive growth rate 1.50%, 3.30% and 0.17% was found in the area, production and productivity of garlic in Karnal district. In the district of Yamunanagar, a growth rate for fenugreek of 7.30% and 7.60% and 13.90% in the area, production and productivity was found. The state of Haryana recorded a significant growth of 1.7%, 2.8% and 1.1% per annum in the area, production and productivity of spice crops respectively. Conclusions: The study revealed a positive growth rate across all the selected spice crops, indicating improving prospects of spice crops in Haryana state.
Źródło:
Economic and Regional Studies; 2021, 14, 3; 346-357
2083-3725
2451-182X
Pojawia się w:
Economic and Regional Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bayesian Estimation of Capital Stock and Depreciation in the Production Function Framework
Autorzy:
Boratyński, Jakub
Osiewalski, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/2075283.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
productive capital stock
depreciation rate
aggregate production function
Bayesian analysis
Opis:
We propose a Bayesian approach to estimating productive capital stocks and depreciation rates within the production function framework, using annual data on output, employment and investment only. Productive capital stock is a concept related to the input of capital services to production, in contrast to the more common net capital stock estimates, representing market value of fixed assets. We formulate a full Bayesian model and employ it in a series of illustrative empirical examples. We find that parameters of our model, from which the time-path of capital is derived, are weakly identified with the data at hand. Nevertheless, estimation is feasible with the use of prior information on the production function parameters and the characteristics of productivity growth. We show how precision of the estimates can be improved by augmenting the model with an equation for the rate of return
Źródło:
Central European Journal of Economic Modelling and Econometrics; 2021, 4; 455-486
2080-0886
2080-119X
Pojawia się w:
Central European Journal of Economic Modelling and Econometrics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Production decline curve analysis for mature gas reservoirs subject to rehabilitation
Autorzy:
Tataru, A.
Stefanescu, D. P.
Bolazs, S,
Powiązania:
https://bibliotekanauki.pl/articles/298803.pdf
Data publikacji:
2018
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
production decline
mature gas reservoir
rehabilitation
production history
depletion
gas flow rate
baseline production
decline curve analysis
reserve volumes
Opis:
Production decline under all its aspects, sometimes controllable, but more and more inconsistent with the growing demands of the natural gas market, has imposed a new approach on mature gas reservoirs which Romania owns, namely, their rehabilitation. During exploitation, after recording a considerable production history and implicitly a appreciable depletion, it is necessary the evaluation of maintaining or changing the exploitation strategy. The approaches in this sense must be from the perspective of improving the value of mature gas fields. Throughout the exploitation of a gas reservoir generally there are distinquished several stages, such as gradually increase of gas flow rates due to increasing gas wells introduced into production; maintaining of a quasi-constant production; a accentuated decline of gas flow rates of the reservoir respectively a attenuated decline of gas flow rates of the reservoir. The first three stages are quite short reported to the whole exploitation process of the reservoir. The production decline appears sooner or later depending on the manifestation form of the reservoir energy. For the accuracy of the baseline which is to be established, can be taken in discussion, as reference intervals, those periods from the production history, in which the points dispersion is minimal, and flow rates respectively the production are comparable with the current ones. Taking into consideration the decline values obtained from decline curve analysis characteristically to every exploitation stage, we consider that to define the baseline production afferent to the next stage, it is optimal to accept the specific decline of the latest exploitation period. It can be noted that throughout production history, although the exploitation of the gas reservoir was intensified, due to accessing new reserve volumes, the decline tendency is to maintain at a limited interval. This behavior indicates the fact that also in conditions of intensifying the exploitation in the future, the decline will maintain a value sensitively close to the values from the latest periods, in which rehabilitation was applied.
Źródło:
AGH Drilling, Oil, Gas; 2018, 35, 1; 255-269
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Potential rate of reproduction for some geographically separate populations of Pseudocalanus spp.
Autorzy:
Dzierzbicka-Glowacka, L.
Zielinski, A.
Powiązania:
https://bibliotekanauki.pl/articles/48822.pdf
Data publikacji:
2004
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
Pseudocalanus
temperature
body size
egg production
potential rate
cephalothorax length
female
Opis:
Quantitative expressions are presented describing the potential reproductive rate per individual female of Pseudocalanus spp. in several different waters (not reduced by food limitation) as a function of both temperature and cephalothorax length of females (one equation for each studied region). The calculations were made for some geographically separate populations of Pseudocalanus spp. from southwest Baffin Island, Nova Scotia, Long Island Sound, Scotland, as well as the southern North Sea and its adjacent waters (e.g. the English Channel). On the basis of the findings presented in this work and from other studies, the reproductive rate was computed as the mean number of eggs per sac divided by 1.25 times the embryonic duration at the given temperature. Also computed was the amount of egg matter produced per day as a percentage of body carbon (and dry weight) of female weight for all localities. The relationships for females from the southern North Sea were obtained for ‘viable eggs’, but they should be treated with reserve. A more suitable expression describing egg production in the southern North Sea is the equation for females from the English Channel obtained here. Our assumptions and approximations appear to predict quite well the temperature-length of female dependent daily rates of egg production of well-fed females of Pseudocalanus spp. for the above waters, and we suggest that they can be used to test the hypothesis more thoroughly.
Źródło:
Oceanologia; 2004, 46, 1
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measurement of phytoplankton photosynthesis rate using a pump-and-probe fluorometer
Autorzy:
Antal, T.K.
Venediktov, P.S.
Matorin, D.N.
Ostrowska, M.
Wozniak, B.
Rubin, A.B.
Powiązania:
https://bibliotekanauki.pl/articles/47511.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
phytoplankton
photosynthesis rate
photosynthesis measurement
fluorometer
plant luminescence
fluorometric method
primary production
Opis:
In this work we have studied the possibility of determining the rate of phytoplankton photosynthesis in situ using a submersible pump-and-probe fluorometer in water areas differing in their trophic level, as well as in climatic and hydrophysical characteristics. A biophysical model was used to describe the relationship between photosynthesis, underwater irradiance, and the intensity of phytoplankton fluorescence excited by an artificial light source. Fluorescence intensity was used as a measure of light absorption by phytoplankton and for assessing the efficiency of photochemical energy conversion at photosynthetic reaction centers. Parameters of the model that could not be measured experimentally were determined by calibrating fluorescence and irradiance data against the primary production measured in the Baltic Sea with the radioactive carbon method. It was shown that the standard deviation of these parameters in situ did not exceed 20%, and the use of their mean values to estimate the phytoplankton photosynthetic rate showed a good correlation between the calculated and measured data on primary production in the Baltic (r = 0.89), Norwegian (r = 0.77) and South China (r = 0.76) Seas.
Źródło:
Oceanologia; 2001, 43, 3; 291-313
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Studies on the rheological properties of the fermentation broth in the production of pectolytic enzymes
Autorzy:
Campeanu, G.
Pele, M.
Cimpeanu, M.
Powiązania:
https://bibliotekanauki.pl/articles/24392.pdf
Data publikacji:
1999
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
shear rate
production
rheological property
fermentation
viscosity
fungi
Aspergillus niger
pectolytic enzyme
Źródło:
International Agrophysics; 1999, 13, 4
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The impact of exchange rate on fisheries production: international evidence from selected countries
Autorzy:
Tepe, Resul
Kayiran, Burhan
Açik, Abdullah
Powiązania:
https://bibliotekanauki.pl/articles/1819208.pdf
Data publikacji:
2020
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
real exchange rate
fisheries production
international trade
econometric relationship
causality
panel data
Opis:
One of the most important factors affecting international trade is exchange rate fluctuations. To date, studies that have analyzed the effect of exchange rates have shown that the effect can vary from sector to sector and from country to country. The fact that this relationship has not been extensively studied in the fisheries industry is the motivation for this study. In this regard, the aim of this study is to determine whether changes in the real exchange rates of countries affect their fisheries production levels. Accordingly, we used the causality test developed by Emirmahmutoglu and Kose (2011), which takes into account both cross-sectional dependencies and heterogeneity. The data set used in this study consisted of 27 annual observations from 38 countries from 1990–2016. The results revealed that changes in the real exchange rate affected fisheries production. This situation shows that changes in exchange rates may affect the international demand for fisheries and serve as a source of motivation for producers.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2020, 63 (135); 87-96
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of macroeconomic factors on the financial market
Autorzy:
Zelga, Kamila
Powiązania:
https://bibliotekanauki.pl/articles/1179448.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
GPD
financial market
indicator
industrial production
inflation
macroeconomics factors
stock returns
unemployment rate
Opis:
Macroeconomic factors affect the economy of each country. The most influential factors are GDP, unemployment rate (positively correlated) and inflation (negatively correlated). Macroeconomic policy through their instruments affects the whole economy the country, so also the business.
Źródło:
World Scientific News; 2017, 78; 164-169
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Seasonal variability in the population dynamics of the main mesozooplankton species in the Gulf of Gdansk (Southern Baltic Sea): Production and mortality rates
Autorzy:
Dzierzbicka-Glowacka, L.
Kalarus, M.
Musialik-Koszarowska, M.
Lemieszek, A.
Zmijewska, M.I.
Powiązania:
https://bibliotekanauki.pl/articles/48667.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
Copepoda
calanoid copepod
biomass
seasonal variability
population dynamics
mesozooplankton
Gdansk Gulf
Baltic Sea
production
mortality rate
secondary production
Temora longicornis
Źródło:
Oceanologia; 2015, 57, 1
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Theoretical Basis of an Integrating Currency Area. The Dilemmas of Polish Accession to the Eurozone
Autorzy:
Dobija, Mieczysław
Powiązania:
https://bibliotekanauki.pl/articles/956885.pdf
Data publikacji:
2013
Wydawca:
Akademia Leona Koźmińskiego w Warszawie
Tematy:
capital
monetary unit
exchange rate
production function
labor productivity
self-financing labor
integrating currency area
Opis:
Purpose: The purpose of this paper is to present a theory that defi nes the creation of an area that includes many countries, in which there is one, single currency and the countries are characterized by a diversifi ed productivity. That is why the paper shows the importance of labor productivity parity for the creation of an integrating and non-discriminatory currency area and indicates the role of this value in the theory of the exchange rate. Additionally, the paper analyzes the risks arising from joining the eurozone. Methodology: The basic methodology is defi ned by a fundamental analysis of the exchange rate and its relations to labor productivity parity. The author formulates a theory of a currency area that integrates economies with different levels of labor productivity. The methodology is supplemented by calculations and a ranking of countries according to the Q-index. Findings: Listing the member countries and candidate countries of the eurozone according to the labor productivity index has demonstrated that the founding member states are characterized by a Q-index close to 3.30. The countries that are already in the eurozone with an index of less than 2.5 belong to the group where problems are accumulating. Countries that are candidates for the eurozone with an index below 2.0, such as Poland, cannot become member of the eurozone. The principles of creating a currency area can however be modifi ed in such a way that countries with various levels of Q can become members, by developing cooperation that is benefi cial to the socio-economic development. Originality: The labor productivity index Q is a result of elaborating an original concept of the production function that is suitable for the purposes of economic analysis. According to this function the Q-index is equivalent to the category labor share and the variable F corresponds to TFP. The function overcomes the disadvantageous features of econometric models of production identifi ed by Joan Robinson and the obtained results modify the theory of the exchange rate, creating good prospects for general monetary integration.
Źródło:
Management and Business Administration. Central Europe; 2013, 21, 4(123); 3-24
2084-3356
Pojawia się w:
Management and Business Administration. Central Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
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