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Wyświetlanie 1-15 z 27
Tytuł:
Optimal Monetary Policy Framework in an Emerging Market Economy under Sanctions Pressure and Restrictions on Capital Flows
Autorzy:
Kharitonchik, Anatoly
Powiązania:
https://bibliotekanauki.pl/articles/47270290.pdf
Data publikacji:
2024-09-20
Wydawca:
Uniwersytet Warszawski. Wydział Nauk Ekonomicznych
Tematy:
monetary policy
inflation
price level
interest rate
gap model
Opis:
The study evaluates the effectiveness of monetary policy regimes that can serve as the basis for economic policy strategies in emerging economies. Based on the macroeconomic gap model for Belarus, simulations of the strong shock impact on the economy using different monetary policy regimes have been implemented. The effects of capital flow restrictions on the stabilization capacity of monetary policy regimes have been examined. Given the existing sanctions and internal capital controls, the most preferable regime for Belarus is a flexible inflation targeting. In transforming the economy and political system towards the inclusivity of political and economic institutions, applying a flexible price-level targeting can be considered.
Źródło:
Central European Economic Journal; 2024, 11, 58; 329-345
2543-6821
Pojawia się w:
Central European Economic Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Uncertainty analysis for efficient fuel allocation using info-gap theory
Autorzy:
Tomaszewska, K.
Piegat, A.
Powiązania:
https://bibliotekanauki.pl/articles/94829.pdf
Data publikacji:
2015
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
uncertainty
info-gap model
robustness function
opportuneness function
niepewność
analiza decyzyjna
Opis:
Theory decision under uncertainty applies different methods to predict future events, physical measurements, which are already unknown. The paper shows one of the decision-making methods in conditions of severe uncertainty in application to a problem. Some aspects of the robustness and opportuneness functions of Info-Gap Theory are presented and used to evaluate the example of efficient fuel allocation. A general outline of decision analysis is presented, including its orientation and models.
Źródło:
Information Systems in Management; 2015, 4, 3; 228-238
2084-5537
2544-1728
Pojawia się w:
Information Systems in Management
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Różne podejścia do modelu luk
Different approaches to the gap model
Autorzy:
Ingaldi, Manuela
Powiązania:
https://bibliotekanauki.pl/articles/114867.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
usługi
jakość usług
oczekiwania
percepcja
model luk jakości
services
quality of services
gap model
expectations
perception
Opis:
Codziennie korzystamy z różnego rodzaju usług. Przedsiębiorstwa usługowe szukają rozwiązań, jak oferować usługi jak najlepszej jakości oraz jak ta jakość oceniać. W przypadku oceny jakości usług wykorzystuje inne metody i narzędzia niż w przypadku wyrobów. Większość metod opartych jest na różnicy pomiędzy oczekiwaniami klientów oraz ich percepcją gotowej usługi. Różnica ta stanowi jedną z luk modelu jakości usług - modelu luk. Celem artykułu była zestawienie różnych wariantów najczęściej opisywanego w literaturze modelu jakości usług - modelu luk. Niniejszy artykuł stanowi opracowanie teoretyczne, a jego celem pobocznym jest zaznajomienie czytelników z podstawowymi elementami modelu luk.
Every day we use various types of services. Service companies are looking for solutions on how to offer services with the best quality and how to assess this quality. When assessing the quality of services, different methods and tools than in case of products are used. Most methods are based on the difference between customers' expectations and their perception of the ready service. This difference is one of the gaps in the service quality model - the gap model. The aim of the paper was to compile various variants of the service quality model most frequently described in the literature - the gap model. This paper is a theoretical study and its secondary goal is to familiarize readers with the basic elements of the gap model.
Źródło:
Zeszyty Naukowe. Quality. Production. Improvement; 2019, 2 (11); 72-82
2544-2813
Pojawia się w:
Zeszyty Naukowe. Quality. Production. Improvement
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Using FORDRY model to forecast transformation of Norway spruce (Picea abies (L.) Karst.) stands in Nadsyansky Regional Landscape Park (Ukrainian Carpathians)
Autorzy:
Kozak, Ihor
Parpan, Taras
Shparyk, Yuriy
Mylenka, Myroslava
Kozak-Balaniuk, Iryna
Powiązania:
https://bibliotekanauki.pl/articles/2041033.pdf
Data publikacji:
2021
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
spruce forest decline
tree biomass
tree number
species composition
prediction
simulation experiment
gap model
Opis:
The aim of this study was to simulate transformation of species composition, biomass and number of treesin spruce stands depending on a possible combination of cutting and planting scenarios as well as climate changes. The FORDRY computer model was used to predict the dynamics of Norway spruce (Picea abies (L.) Karst.) stands in Nadsyansky Regional Landscape Park in the Ukrainian Carpathians. Potential changes in species composition, biomass and number of trees were forecasted for the next 50 years. Four scenarios, first – warm-dry, second – cutting dead spruce trees, third – cutting all trees andfourth – planting, were compared to the control one. The analysis revealed a rapid decrease of stand biomass in the first decade as a result of spruce decline. The model predicts an increase in beech biomass before the 50th year of simulation in all scenarios. In the planting scenario, the biomass of beech increased up to 199.9 ± 6.9 t·ha-1 in the 50th year. Correlation analysis showed weak autocorrelations of spruce and negative cross-correlations of spruce with the total stand in control and other scenarios. The output of performed simulations is supported with field and literature data. Results of this study can be applied in the long-term planning of the management and conservation activities in this region. The application of FORDRY model was found useful for analysing the potential scenarios of spruce stand transformation in Nadsyansky Regional Landscape Park.
Źródło:
Folia Forestalia Polonica. Series A . Forestry; 2021, 63, 3; 183-194
0071-6677
Pojawia się w:
Folia Forestalia Polonica. Series A . Forestry
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On development capability
Autorzy:
Myszewski, J. M.
Powiązania:
https://bibliotekanauki.pl/articles/409550.pdf
Data publikacji:
2014
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
development
capability
gap
organization
effectiveness
efficiency
model
Opis:
Purpose of the text is to study a concept of development capability and possibility to express it quantitatively. Concept of organization’s development is shown as process of eliminating gaps encountered by organization. A mathematical model of “problem cleaning” is used. It is shown that: There is a mathematical model of closing development gap, which involves characteristics of gap, of resources and parameters of development process. There are four quantities that determine performance of development process. They refer to organization’s characteristics that are set by the strategic management. Model illustrates impact of strategic decisions on effectiveness of development and shows that “time to gap” is one of key factors that determine development capability.
Źródło:
Research in Logistics & Production; 2014, 4, 1; 55-66
2083-4942
2083-4950
Pojawia się w:
Research in Logistics & Production
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ potencjalnych zmian klimatycznych na zdolność konkurencyjną głównych gatunków drzew w Polsce
Impact of potential climate changes on competitive ability of main forest tree species in Poland
Autorzy:
Zajączkowski, J.
Brzeziecki, B.
Perzanowski, K.
Kozak, I.
Powiązania:
https://bibliotekanauki.pl/articles/991514.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
zmiany klimatyczne
oddzialywanie na rosliny
drzewa lesne
gatunki lasotworcze
jodla pospolita
Abies alba
olsza czarna
Alnus glutinosa
brzoza brodawkowata
Betula pendula
buk zwyczajny
Fagus sylvatica
jesion wyniosly
Fraxinus excelsior
swierk pospolity
Picea abies
sosna zwyczajna
Pinus sylvestris
dab szypulkowy
Quercus robur
konkurencyjnosc
climate change
forest gap model
growth multipliers
tree competition
Opis:
An influence of environmental changes upon forest tree species competition was studied for suggested scenario of environmental changes (3−4°C increase of monthly temperatures), 8 main tree species and 6 natural regions. For a synthetic assessment of the reaction of various species for thermal and higric parameters of the climate, the growth multipliers DDGF and SMGF were used. The main environmental factor influencing future growth of tree species in Poland will be water shortage due to increased evapotranspiration. Regional decrease of water sensitive species importance, eg. alder, spruce and birch, accompanied by country−scale expansion of highly competitive, late−successional species, eg. beech and hornbeam is expected.
Źródło:
Sylwan; 2013, 157, 04; 253-261
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tax evasion in the EU countries following a predictive analysis and a forecast model for Slovakia
Autorzy:
Dobrovič, Ján
Rajnoha, Rastislav
Šuleř, Petr
Powiązania:
https://bibliotekanauki.pl/articles/19233707.pdf
Data publikacji:
2021
Wydawca:
Instytut Badań Gospodarczych
Tematy:
sustainable economic development
tax evasion
VAT gap
predictive statistical model
forecasting
Opis:
Research background: Tax evasion is an urgent challenge for governments, as reaching sufficient level of tax revenues enable adequate sustainable economic development. The motivation for the research was thus the identification of the situation in the EU countries.  Purpose of the article: The main research objective was to identify the extent of tax evasion in the EU countries, with a subsequent specific focus on the econometric predictive models and a forecast of their future development in the case of Slovakia as the poorest performing country of the V4 in this area.  Methods: The research was primarily based on testing selected statistical indicators in the field of tax evasions expressed on the basis of the VAT gap. The data for the research was obtained from the EUROSTAT database and the international system VIES for the period between 2000 and 2017. In addition to panel graphs, the research hypotheses were tested primarily using a cluster analysis, t-test, time series analysis, and an analysis of the time series trend with 4 basic models: linear trend, quadratic trend, growth curve model, and S-curve model. On the basis of the Mean Absolute Percentage Error (MAPE), the S-Curve model was selected as the determining model of predicting tax evasion.  Findings & value added: Based on the results of the cluster analysis, the EU countries were divided into five reference groups by the VAT gap value, using the VAT gap percentage share on the overall GDP value. The research also provides a unique methodological framework and a unique econometric model for predicting the future VAT gap in Slovakia as the poorest performing country of the V4 in this area, which is applicable to other V4 and EU countries. The research results also enable policy-makers in the EU countries and specifically also in Slovakia and other V4 countries to compare themselves explicitly with the reference countries of the EU in terms of tax evasion and subsequently adopt adequate measures to improve the effectiveness and performance in this field.
Źródło:
Oeconomia Copernicana; 2021, 12, 3; 701-728
2083-1277
Pojawia się w:
Oeconomia Copernicana
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kwantyfikacja zmian luki VAT: podejście ekonometryczne
Quantification of Changes in the VAT Gap: An Econometric Approach
Autorzy:
Konopczak, Karolina
Powiązania:
https://bibliotekanauki.pl/articles/574339.pdf
Data publikacji:
2020-06-30
Wydawca:
Szkoła Główna Handlowa w Warszawie. Kolegium Analiz Ekonomicznych
Tematy:
luka VAT
elastyczność dochodów podatkowych
analiza kointegracji
model ARDL
cointegration
VAT gap
tax elasticities
ARDL model
Opis:
This article proposes an alternative methodology for estimating changes in the VAT gap that allows for their timely (quarterly) monitoring. It combines two traditions of tax modelling: calculating a discrepancy between theoretical tax liabilities and the amount of tax actually collected, as well as estimating the elasticities of tax revenues. In this approach, the VAT gap trajectory is associated with a changing elasticity of actual tax revenues with respect to theoretical revenues (or, equivalently, the elasticity of actual revenues corrected for changes in the tax system with respect to the tax base). The method was used to estimate changes in the VAT gap in Poland from 2016 to 2018.
W niniejszym artykule zaproponowano alternatywną względem stosowanych w literaturze metodykę szacowania zmian luki VAT, pozwalającą na jej bieżący (kwartalny) monitoring. Łączy ona dwie tradycje modelowania dochodów podatkowych: metodę rozbieżności oraz metodę szacowania elastyczności dochodów podatkowych względem bazy podatkowej. Kształtowanie się luki VAT utożsamiane jest ze zmianami reaktywności rzeczywistych dochodów podatkowych względem teoretycznych (czyli – ekwiwalentnie – rzeczywistych dochodów względem bazy podatkowej przy kontroli zmian stawek podatkowych). Metoda została wykorzystana do oszacowania zmian luki VAT w Polsce w latach 2016–2018.
Źródło:
Gospodarka Narodowa. The Polish Journal of Economics; 2020, 302, 2; 25-42
2300-5238
Pojawia się w:
Gospodarka Narodowa. The Polish Journal of Economics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measurement of combined gap in whole process of transmission lines’ live working based on 3D laser point cloud
Autorzy:
Wang, Ying
Zhang, Haitao
Lv, Qiang
Gao, Qiang
Yi, Mingxing
Powiązania:
https://bibliotekanauki.pl/articles/27309938.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
3D model
combined gap
laser point cloud
live working
transmission lines
Opis:
Transmission lines’ live working is one of an effective means to ensure the reliable operation of transmission lines. In order to solve the unsafe problems existing in the implementation of traditional live working, the paper uses ground-based lidar to collect point cloud data. A tile based on the pyramid data structure is proposed to complete the storage and calling of point cloud data. The improved bidirectional filtering algorithm is used to distinguish surface features quickly and obtain a 3D model of the site. Considering the characteristics of live working, the speed of data reading and querying, the nearest point search algorithm based on octree is used to acquire a real- time calculation of the safe distance of each point in the planned path, and the safety of the operation mode is obtained by comparing with the value specified in the regulation, and assist in making decisions of the operation plan. In the paper, the simulation of the actual working condition is carried out by taking the “the electric lifting device ascending” as an example. The experimental results show that the established three-dimensional model can meet the whole process control of the operation, and has achieved practical effect.
Źródło:
Archives of Electrical Engineering; 2023, 72, 3; 737--753
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling of fluid flow in microgap considering the boundary change of dynamic viscosity
Modelirovanie techenija zhidkosti v mikrozazore s uchetom granichnogo izmenenija dinamicheskojj vjazkosti
Autorzy:
Sokolova, Y.
Rasskazova, Y.
Krol, O.
Sokolov, V.
Powiązania:
https://bibliotekanauki.pl/articles/792974.pdf
Data publikacji:
2016
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
dynamic viscosity
fluid flow
flow velocity distribution
viscous fluid
gap
distribution model
Źródło:
Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2016, 16, 2
1641-7739
Pojawia się w:
Teka Komisji Motoryzacji i Energetyki Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
THE IMPACT OF SOME VARIABLES ON THE VAT GAP IN THE MEMBER STATES OF THE EUROPEAN UNION COMPANY
Autorzy:
Majerová, Ingrid
Powiązania:
https://bibliotekanauki.pl/articles/489095.pdf
Data publikacji:
2016
Wydawca:
Instytut Badań Gospodarczych
Tematy:
tax gap
value added tax
Corruption Perception Index
GDP growth
VTTL model
regression analysis
Opis:
One of the most serious problems of fiscal character is the issue of the tax gap. The tax gap is defined as the amount of tax liability faced by taxpayers that is not paid on time. The tax gap comes from three main areas of non-compliance with the tax law – firstly, from underreporting of income, secondly, from underpayment of taxes, and thirdly, from non-filing of returns. The tax evasions in the area of value added tax create one of the largest groups of tax gaps. This article describes the current situation in the field of tax gap in selected countries of the European Union. The aim of this paper is to determine the dependence of the VAT gap on three variables: the Corruption Perception Index CPI, GDP growth rate and the basic VAT rate. The method of regression analysis was used, which was performed on data in the years 2000–2011. Although it could be assumed that tax burden will affect the VAT gap the most, the highest dependence was shown in the case of Corruption Perception Index.
Źródło:
Oeconomia Copernicana; 2016, 7, 3; 339-355
2083-1277
Pojawia się w:
Oeconomia Copernicana
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of oil leaks in a variable-height gap between the cylinder block and the valve plate in a piston pump by means of author-designed software and CFD Fluent
Analiza przecieków oleju w szczelinie rozrządu pompy wielotłoczkowej z uwzględnieniem własnego programu i CFD Fluent
Autorzy:
Zloto, T.
Sochacki, D.
Stryjewski, P.
Powiązania:
https://bibliotekanauki.pl/articles/792175.pdf
Data publikacji:
2014
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
oil leakage
computational model
gap
cylinder block
piston pump
numerical method
CFD Fluent software
Źródło:
Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2014, 14, 4
1641-7739
Pojawia się w:
Teka Komisji Motoryzacji i Energetyki Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zarządzanie ciągłością wiedzy w modelu 70-20-10
Continuity of Management Knowledge in the Model 70-20-10
Autorzy:
Gajdzik, Bożena
Powiązania:
https://bibliotekanauki.pl/articles/466309.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Humanistyczno-Przyrodniczy im. Jana Długosza w Częstochowie. Wydawnictwo Uczelniane
Tematy:
luka wiedzy
model 70-20-10
pokolenie X
pokolenie Y
knowledge gap
Generation X
Generation Y
Opis:
W artykule przedstawiono problematykę zarządzania ciągłością wiedzy w organizacjach w warunkach zmian społeczno-demograficznych (starzenie się społeczeństw, wypieranie generacji X przez generację Y z organizacji) i zmian w zarządzaniu przedsiębiorstwem (nowe paradygmaty zarządzania). Omówione zmiany uznano za determinanty wprowadzenia modelu uczenia się i doskonalenia zawodowego – modelu 70-20-10.
This paper presents the problem of continuity of knowledge management in organizations in situation of socio-demographic changes (more and more older people, displacement X generation by generation Y of the organization), and changes in the management of the company (new paradigms of management). Discussed changes were considered determinants of the introduction of the model of learning and development – 70-20-10 model.
Źródło:
Prace Naukowe Akademii im. Jana Długosza w Częstochowie. Pragmata tes Oikonomias; 2016, 10; 11-21
2300-2999
Pojawia się w:
Prace Naukowe Akademii im. Jana Długosza w Częstochowie. Pragmata tes Oikonomias
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A study of the effects of changing burn-up and gap gaseous compound on the gap convection coefficient (in a hot fuel pin) in VVER-1000 reactor
Autorzy:
Rahgoshay, M.
Rahmani, Y.
Powiązania:
https://bibliotekanauki.pl/articles/147623.pdf
Data publikacji:
2007
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
VVER-1000
nuclear reactor
burn-up
Ross and Stoute model
gap convection
hot fuel pin
thermal expansion
Opis:
In this article we worked on the result and process of calculation of the gap heat transfer coefficient for a hot fuel pin in accordance with burn-up changes in the VVER-1000 reactor at the Bushehr nuclear power plant (Iran). With regard to the fact that in calculating the fuel gap heat transfer coefficient, various parameters are effective and the need for designing a model is being felt, therefore, in this article we used Ross and Stoute gap model to study impacts of different effective parameters such as thermal expansion and gaseous fission products on the hgap change rate. Over time and with changes in fuel burn-up some gaseous fission products such as xenon, argon and krypton gases are released to the gas mixture in the gap, which originally contained helium. In this study, the composition of gaseous elements in the gap volume during different times of reactor operation was found using ORIGEN code [3]. Considering that the thermal conduction of these gases is lower than that of helium, and by using the Ross and Stoute gap model, we find first that the changes in gaseous compounds in the gap reduce the values of gap thermal conductivity coefficient, but considering thermal expansion (due to burn-up alterations) of fuel and clad resulting in the reduction of gap thickness we find that the gap heat transfer coefficient will augment in a broad range of burn-up changes. These changes result in a higher rate of gap thickness reduction than the low rate of decrease of heat conduction coefficient of the gas in the gap during burn-up. Once these changes have been defined, we can proceed with the analysis of the results of calculations based on the Ross and Stoute model and compare the results obtained with the experimental results for a hot fuel pin as presented in the final safety analysis report of the VVER-1000 reactor at Bushehr [2]. It is noteworthy that the results of accomplished calculations based on the Ross and Stoute model correspond well with the existing experimental results for this reactor.
Źródło:
Nukleonika; 2007, 52, 3; 93-95
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A biologically inspired approach to feasible gait learning for a hexapod robot
Autorzy:
Belter, D.
Skrzypczyński, P.
Powiązania:
https://bibliotekanauki.pl/articles/907777.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
identyfikacja modelu
uczenie się ewolucyjne
robot nożny
evolutionary learning
legged robots
gait generation
model identification
reality gap
Opis:
The objective of this paper is to develop feasible gait patterns that could be used to control a real hexapod walking robot. These gaits should enable the fastest movement that is possible with the given robot's mechanics and drives on a flat terrain. Biological inspirations are commonly used in the design of walking robots and their control algorithms. However, legged robots differ significantly from their biological counterparts. Hence we believe that gait patterns should be learned using the robot or its simulation model rather than copied from insect behaviour. However, as we have found tahula rasa learning ineffective in this case due to the large and complicated search space, we adopt a different strategy: in a series of simulations we show how a progressive reduction of the permissible search space for the leg movements leads to the evolution of effective gait patterns. This strategy enables the evolutionary algorithm to discover proper leg co-ordination rules for a hexapod robot, using only simple dependencies between the states of the legs and a simple fitness function. The dependencies used are inspired by typical insect behaviour, although we show that all the introduced rules emerge also naturally in the evolved gait patterns. Finally, the gaits evolved in simulations are shown to be effective in experiments on a real walking robot.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2010, 20, 1; 69-84
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
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