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Tytuł:
3D Computer Models of the Ag-Sb-Sn and MgO-Al₂O₃-SiO₂ T-x-y Diagrams
Autorzy:
Lutsyk, V.
Vorob'eva, V.
Zelenaya, A.
Powiązania:
https://bibliotekanauki.pl/articles/1029637.pdf
Data publikacji:
2018-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
phase diagrams
3D simulation
Ag-Sb-Sn
MgO-SiO₂-Al₂O₃
mass balance
Opis:
Three-dimensional (3D) computer models of Ag-Sb-Sn and MgO-Al₂O₃-SiO₂ systems T-x-y diagrams have been designed. For the metal system two versions of 3D model of its phase diagram have been constructed according to the contradictions in the temperature intervals of the compound Sb₂Sn₃ stability. Possibilities of the analysis of the stages of crystallization and prediction of microstructural constituents with the aid of the calculation of vertical mass balance diagrams are demonstrated on the basis of the 3D computer model for the oxide system.
Źródło:
Acta Physica Polonica A; 2018, 133, 4; 763-766
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A critical review and reinterpretation of bio-, litho- and seismostratigraphic data of the Southern Baltic deposits
Autorzy:
Zachowicz, J.
Miotk-Szpiganowicz, G.
Kramarska, R.
Uścinowicz, Sz.
Przedziecki, P.
Powiązania:
https://bibliotekanauki.pl/articles/1204982.pdf
Data publikacji:
2008
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
pollen and diatoms diagrams
14C datings
bio- litho- and seismostratigraphy
Late Pleistocene
Holocene
southern Baltic Sea
Opis:
The aim of this study was the reinterpretation of the published and unpublished Late-Pleistocene and Holocene pollen and diatom diagrams of deposits from the sedimentary basins of the Southern Baltic Sea and the correlation of the distinguished biostratigraphic units with lithological parameters, seismostratigraphic units. Chronostratigraphic subdivision of the Late Pleistocene and Holocene was also made. To facilitate the correlation and reinterpretation of the results of biostratigraphic (palynological and diatom) analyses, new unified and simplified diagrams were drawn using the POLPAL software. Such diagrams were constructed for all the sites under comparison, even for those of no numerical data. In such cases, the published diagrams were scanned and their percentage values were the basis for new diagrams. A review and reinterpretation of biostratigraphic data show an almost complete lack of palynological documentation and diatom diagrams for the Late Pleistocene period and poor documentation for the Early Holocene. Middle and Late Holocene Baltic muds have the best biostratigraphic documentation and radiocarbon dating, which greatly facilitates their location on the geological time scale. Among the Southern Baltic postglacial sediments three lithostratigraphic units were identified. They differ in their lithological features reflecting the conditions prevalent in the sedimentary basin during deposition. It should be noted that these units meet no formal criteria for distinguishing lithostratigraphic units. Similarly, within the Late Pleistocene and Holocene sediments of Southern Baltic deep-water basins, three main seismostratigraphic complexes have been identified. The integrated analysis of seismoacoustic profiles, lithological profiles of cores and reinterpretated biostratigraphic data allow a correlation of the bio-, litho- and seismostratigraphic units with chronostratigraphic units and Baltic evolutionary phases.
Źródło:
Polish Geological Institute Special Papers; 2008, 23; 117-138
1507-9791
Pojawia się w:
Polish Geological Institute Special Papers
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Access to healthcare as an important moderating variable for understanding geography of COVID-19 outcomes – preliminary insights from Poland
Autorzy:
Jarynowski, Andrzej
Belik, Vitaly
Powiązania:
https://bibliotekanauki.pl/articles/25711060.pdf
Data publikacji:
2022-09-12
Wydawca:
Gdański Uniwersytet Medyczny
Tematy:
health inequalities
statistical modelling
COVID-19
healthcare access
immunity level
quasi-causal diagrams
Opis:
Introduction Biases in the measurement of COVID-19 burden and the uncertainty in estimation of the corresponding epidemiologic indexes are known and common phenomena. We investigated to what extent healthcare access (HCA)-related supply/demand interfered with the registered data on COVID-19 in Poland. Material and Methods We ran a multiple linear regression model with interactions to explain the geographic variation in seroprevalence, hospitalizations (on the voivodeship level) and current (beginning of the 4th wave of COVID cases – 15.09-21.11.2021) case notifications/crude mortality (on poviat level). We took vaccination coverage and cumulative case notifications up to the so-called 3rd wave as predictor variables and supply/demand (HCA) as moderating variables. Results HCA with interacting terms (mainly demand) explained to the great extent the variance of current incidence and most of the variance in the current mortality rates. HCA (mainly supply) was significantly moderating cumulative case notifications until the 3rd wave of cases, thus explaining the variance in seroprevalence and hospitalization. Conclusions Seeking causal relations between the vaccination- or infection-gained immunity and the current infection dynamics could be misleading without understanding the socio-epidemiologic context such as the moderating role of HCA (sensu lato). After quantification, HCA could be incorporated into epidemiologic models for improved prediction of the actual disease burden.
Źródło:
European Journal of Translational and Clinical Medicine; 2022, 5, 2; 5-15
2657-3148
2657-3156
Pojawia się w:
European Journal of Translational and Clinical Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Access to healthcare as an important moderating variable for understanding the geography of COVID-19 outcomes - preliminary insights from Poland
Autorzy:
Jarynowski, Andrzej
Belik, Vitaly
Powiązania:
https://bibliotekanauki.pl/articles/2203180.pdf
Data publikacji:
2022
Wydawca:
Gdański Uniwersytet Medyczny
Tematy:
healthcare access
health inequalities
COVID-19
statistical modelling
immunity level
quasi-causal diagrams
Opis:
Introducotin: Biases in the measurement of COVID-19 burden and the uncertainty in esmtiaotin of the corresponding epidemiologic indexes are known and common phenomena in infecotius diseases. We invesgtiated to what extent healthcare access (HCA)-related supply/demand interfered with the registered data on COVID-19 in Poland. Material and Methods: We ran a mulptile linear regression model with interacotins to explain the geographic variaotin in seroprevalence, hospitalizaotins (on the voivodeship - NUTS-2 level) and current (beginning of the 4 th wave of COVID cases - 15.09-21.11.2021) case nocftiaotins/crude mortality (on poviat - old NUTS-4 level). We took vaccinaotin coverage and cumulavtie case nocftiaotins up to the so called 3rd wave as predictor variables and supply/demand (HCA) as moderantig variables. Results: HCA with interacntig terms (mainly demand) explained to the great extent the variance of current incidence and most of the variance in the current mortality rates. HCA (mainly supply) was signicfiantly moderantig cumulavtie case nocftiaotins unlti the 3rd wave of cases, thus explaining the variance in seroprevalence and hospitalizaotin. Conclusion: Seeking causal relaotins between the vaccinaotinor infecotin-gained immunity level and the current infecotin dynamics could be misleading without understanding the socio-epidemiologic context such as the moderantig role of HCA (sensu lato). Aeftr quancftiation, HCA could be incorporated into epidemiologic models for improved prediction of the actual disease burden. Jarynowski A, Belik V. Access to healthcare as an important moderating variable for understanding the geography of COVID-19 outcomes - preliminary insights from Poland. Eur J Transl Clin Med. 2022;5(2):5-15.
Źródło:
European Journal of Translational and Clinical Medicine; 2022, 5, 2; 5-15
2657-3148
2657-3156
Pojawia się w:
European Journal of Translational and Clinical Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Agricultural commodities: An integrated approach to assess the volatility spillover and dynamic connectedness
Autorzy:
Mishra, Arunendra
Kumar, R Prasanth
Powiązania:
https://bibliotekanauki.pl/articles/1891375.pdf
Data publikacji:
2021-12-17
Wydawca:
Uniwersytet Ekonomiczny w Poznaniu
Tematy:
dynamic connectedness
TVPVAR
price volatility
volatility spillover
ag ricultural commodities
network diagrams
Opis:
In this article the dynamic connectedness between the five agricultural commodities is examined by implementing the Diebold and Yılmaz (VAR based) and Time Varying Parameter Vector Autoregressions (TVP-VAR) measures for understanding the time-varying variance-covariance mechanism using daily data for the period of 2005 to 2019. The findings reveal that at an overall level all the commodity prices are less susceptible to significant volatility shocks from other commodities specifically before the introduction of the pan-India electronic trading portal (eNAM). Cotton prices do not show any variation due to spillover from others for the entire study period. The volatility spillover is visible post eNAM period particularly for the commodity stock prices. Whereas at an overall level the total directional connectedness has gone down in the post eNAM era. The network analysis suggests that the commodity stock prices show a stronger association as compared to market prices. Generally commodity prices show volatility connectedness but with respect to their own market which means strong spillover is missing among both the markets.
Źródło:
Economics and Business Review; 2021, 7, 4; 28-53
2392-1641
Pojawia się w:
Economics and Business Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Algorithms and methods for analysis of the optical structure factor of fractal aggregates
Autorzy:
Mroczka, J.
Woźniak, M.
Onofri, F. R. A.
Powiązania:
https://bibliotekanauki.pl/articles/221757.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fractals
aggregates
light scattering
scattering diagrams
structure factor
Opis:
We introduce numerical methods and algorithms to estimate the main parameters of fractal-like particle aggregates from their optical structure factor (i.e. light scattering diagrams). The first algorithm is based on a direct and simple method, but its applicability is limited to aggregates with large size parameter and intermediate fractal dimension. The second algorithm requires to build calibration curves based on accurate particle agglomeration and particle light scattering models. It allows analyzing the optical structure factor of much smaller aggregates, regardless of their fractal dimension and the size of the single particles. Therefore, this algorithm as well as the introduction of a criteria curve to detect the different scattering regimes, are thought to be powerful tools to perform reliable and reproducible analyses.
Źródło:
Metrology and Measurement Systems; 2012, 19, 3; 459-470
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Algorithms for integral solutions of a class of diophantine equations
Autorzy:
Polak, A.
Powiązania:
https://bibliotekanauki.pl/articles/206419.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
integral quadratic form
unit form
diophantine equations
roots
Euler bilinear form
Euclidean diagrams
mesh quiver
algorithm
Maple
Opis:
In 1970 a negative solution to the tenth Hilbert problem, concerning the determination of integral solutions of diophantine equations, has been published by Y. W. Matiyasevich (see Matiyasevich, 1970). Despite this result, we can present algorithms to compute integral solutions (roots) for a wide class of quadratic diophantine equations of the form q(x) = d, where q : Zn → Z is a homogeneous quadratic form. We will focus on the roots of one (i.e., d = 1) of quadratic Euler forms of selected posets from Loupias list (see Loupias, 1975). In particular, we will describe the roots of positive definite quadratic forms and the roots of quadratic forms that are principal (see Simson, 2010a). The algorithms and results we present here are successfully used in the representation theory of finite groups and algebras.
Źródło:
Control and Cybernetics; 2011, 40, 2; 491-514
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysing applicability of selected methods to smooth indicator diagrams of marine medium-speed engine
Autorzy:
Pawletko, R.
Powiązania:
https://bibliotekanauki.pl/articles/259730.pdf
Data publikacji:
2015
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
indicator diagrams
smoothing waveforms
filtering disturbances
Opis:
The article analyses the applicability of selected smoothing methods to smooth indicator diagram curves and to filter disturbances. An intermediate goal of the study was an attempt to extract disturbances recorded during pressure curve smoothing, which are believed to be a source of important diagnostic information. Within the framework of the reported analysis, a comparison was made between the moving average method, the Savitzky-Golay filter, and the frequency filtration method. The research was performed on a marine medium-speed engine Sulzer 3Al 25/30, which has a relatively long indicator passage.
Źródło:
Polish Maritime Research; 2015, 2; 55-61
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Aplikacja niezawodnościowch struktur fazowych do wyznaczania niezawodności i kosztów eksploatacji technicznej wtryskiwaczy systemu Common Rail
Application of Reliability Phase Diagrams to Determine the Reliability and Operating Cost of Common Rail System Injectors
Autorzy:
Kaczor, G.
Lorenc, A.
Powiązania:
https://bibliotekanauki.pl/articles/257151.pdf
Data publikacji:
2012
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Eksploatacji - Państwowy Instytut Badawczy
Tematy:
wtryskiwacze
analiza niezawodności
niezawodnościowe struktury fazowe
koszty eksploatacji technicznej
generatory liczb losowych
injection systems
reliability analysis
reliability phase diagrams
operation cost
random number generators
Opis:
Istotnym aspektem analizy niezawodności obiektów technicznych jest uwzględnienie poszczególnych faz w ich pracy, podczas których funkcyjne charakterystyki niezawodnościowe ulegają nieustannym zmianom. Dzięki dostępności generatorów liczb losowych, jako funkcjonalnych narzędzi ułatwiających prowadzenie dyskretnych symulacji czasu poprawnej pracy, wzrosło zaawansowanie w opracowywaniu stochastycznych metod służących do opisu zjawisk rzeczywistych. Niniejszy artykuł dotyczy wykorzystania niezawodnościowych struktur fazowych do modelowania i analizy niezawodności wtryskiwaczy układu Common Rail z uwzględnieniem kosztów ich eksploatacji technicznej.
An important aspect of the reliability analysis of technical objects is to take into account various phases in their operation during which the functional characteristics of reliability are changed. The sophistication level of the development of the stochastic methods that are used to describe the real phenomena has increased since random number generators were introduced. This article concerns the use of reliability phase diagrams to create a reliability model including the costs of their operation.
Źródło:
Problemy Eksploatacji; 2012, 3; 29-37
1232-9312
Pojawia się w:
Problemy Eksploatacji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessing diagnostic applicability of heat release characteristics determined based on ship engine indicator diagrams
Autorzy:
Polanowski, S.
Powiązania:
https://bibliotekanauki.pl/articles/258814.pdf
Data publikacji:
2009
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
ship piston engines
indicator diagrams
heat release
characteristics
diagnostic application
Opis:
In order to determine indicator diagrams-based heat release characteristics, a single- zone model of net heat release was used for perfect gas. It was proved that when a constant value for isentropic exponent is assumed, the error in determining the characteristics can be limited to 1% at the nominal load. The effect of errors in determining the position of piston TDC, as well as that of gas passages and indicator valves on the calculated characteristics was evaluated. It was shown that for low-speed engines the effect of gas passages in negligible, while for medium-speed engines the characteristics reveal some deformations (waves), which are repeatable for an individual cylinder in the examined engine construction. The results of the performed investigations and analyses suggest possibility and advisability of the use of heat release characteristics in diagnosing ship engines, in particular low-speed machines.
Źródło:
Polish Maritime Research; 2009, 3; 32-35
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Automated software-based in-field self-test program synthesis
Autorzy:
Jasnetski, A.
Ubar, R.
Tsertov, A
Powiązania:
https://bibliotekanauki.pl/articles/397877.pdf
Data publikacji:
2017
Wydawca:
Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
Tematy:
microprocessor
software based self-test
SBST
automatic test program generation
high-level decision diagrams
HLDD synthesis
mikroprocesor
programy ATPG
HLDD
synteza HLDD
Opis:
This paper presents a methodology to automate functional Software-Based Self-Test program development. We rely on the previously published research on modeling processors using subclass of acyclic directed graphs called High-Level Decision Diagrams (HLDD). The HLDD model of the processor gets generated from its Instruction Set Architecture. The HLDD model is then used together with beforehand prepared assembly program templates in the generation of the complete self-test program. The research presented in this paper includes examples of test generation for the 32-bit SPARCv8 microprocessor Leon 3. The experimental results demonstrate that automatically generated SBST program obtains comparable to the state-of the art fault coverage data.
Źródło:
International Journal of Microelectronics and Computer Science; 2017, 8, 2; 57-64
2080-8755
2353-9607
Pojawia się w:
International Journal of Microelectronics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Awangardowe techniki kompozytorskie w Trzech diagramach na flet solo Henryka Mikołaja Góreckiego
Avant-garde compositional techniques in Three diagrams for solo flute by Henryk Mikołaj Górecki
Autorzy:
Sucharska, Weronika
Powiązania:
https://bibliotekanauki.pl/articles/514016.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Jagielloński. Koło Naukowe Studentów Muzykologii UJ
Tematy:
Henryk Mikołaj Gorecki
Three diagrams for solo flute
compositional techniques
punctualism
aleatorism
serialism
Opis:
The aim of the article is to analyse Three diagrams for solo flute Op. 15 by Henryk Mikołaj Gorecki in the light of compositional techniques used in the piece as well as placing the work in the context of the early output of the composer. In order to achieve the defined aims the score has been analysed as well as the statements of the composer and of people related to him. This research enabled the author to precise in what ways Gorecki uses techniques such as serialism, punctualism and aleatorism. In the paper composer’s individual and innovative approach to the avant-garde techniques is revealed. However, the idiomatic elements of the whole Gorecki’s style are also present in the analysed work. The article consists of two parts. The first part includes the problem of history and the style of Henryk Mikołaj Gorecki’s early works. The second part is devoted to the analysis and conclusions.
Źródło:
Kwartalnik Młodych Muzykologów UJ; 2016, 4(31); 78-99
2956-4107
2353-7094
Pojawia się w:
Kwartalnik Młodych Muzykologów UJ
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bezpieczna platforma sprzętowa dla aplikacji opisanych w języku FBD
Safety execution framework for FB applications
Autorzy:
Śnieżek, M.
Powiązania:
https://bibliotekanauki.pl/articles/156270.pdf
Data publikacji:
2005
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
sterowanie bezpieczne
sterownik logiczny
PLC
język bloków funkcyjnych
formalna weryfikacja
safety related control
Safety Integrity Level 3
Function Block Diagrams
software verification
programmable logic controller
Opis:
W pracy przedstawiono programowalny sterownik logiczny, zachowujący się w sposób bezpieczny. Zachowanie to obejmuje normalną pracę, podczas której wymaga się poprawnego sterowania, jak również stan awarii, w którym wyjścia muszą być automatycznie wyzerowane. Algorytm sterowania jest opisany metodą bloków funkcyjnych FBD i SFC zgodną z normą IEC-61131. Zastosowana architektura sprzętowa sprzyja podzieleniu oprogramowania na dwie części. Pierwsza część - stała, niezależna od aplikacji - obejmuje bibliotekę bloków funkcyjnych. część druga - zmienna, bezpośrednio zależna od aplikacji - zawiera strukturę połączeń bloków. Obydwie części są wykonywane przez osobne procesory. Do badania poprawności stałej części programu zaproponowano formalną metodę wykorzystującą logikę wyższego rzędu HOL. Część zamienną bada się stosując metodę zróżnicowanej retranslacji.
To architecturally support the programming of safety related control applications in the graphical language Function Block Diagram and the verification of such software meeting the requirements of safety Integrity level 3, a dedicated, low complexity execution platform is presented. Its hardware is fault detecting to immediately initiate emegrency shut-downs in case of malfunctions. By design, there is no semantic gap between the programming and machine execution levels, enabling the safety licensing of application software by extremely simple, but rigorous methods, viz., diverse back translation and inspection. Operating in strictly periodic fashion, the platform exhibits fully predictable real time behaviour.
Źródło:
Pomiary Automatyka Kontrola; 2005, R. 51, nr 1, 1; 31-33
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Charged projectile spectrometry using solid-state nuclear track detector of the PM-355 type
Autorzy:
Malinowska, A.
Jaskóła, M.
Korman, A.
Szydłowski, A.
Malinowski, K.
Kuk, K.
Powiązania:
https://bibliotekanauki.pl/articles/146945.pdf
Data publikacji:
2015
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
solid-state nuclear track detectors (SSNTDs)
PM-355
energy resolution of proton and deuteron
calibration diagrams
track mean gray level
Opis:
To use effectively any radiation detector in high-temperature plasma experiments, it must have a lot of benefits and fulfill a number of requirements. The most important are: a high energy resolution, linearity over a wide range of recorded particle energy, high detection efficiency for these particles, a long lifetime and resistance to harsh conditions existing in plasma experiments and so on. Solid-state nuclear track detectors have been used in our laboratory in plasma experiments for many years, but recently we have made an attempt to use these detectors in spectroscopic measurements performed on some plasma facilities. This paper presents a method that we used to elaborate etched track diameters to evaluate the incident projectile energy magnitude. The method is based on the data obtained from a semiautomatic track scanning system that selects tracks according to two parameters, track diameter and its mean gray level.
Źródło:
Nukleonika; 2015, 60, No. 3, part 2; 591-596
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of indicator and heat release graphs for vw 1.9 tdi engine supplied diesel fuel and rapeseed methyl esters (RME)
Autorzy:
Cisek, J.
Powiązania:
https://bibliotekanauki.pl/articles/247568.pdf
Data publikacji:
2013
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
RME
FAME
indicator diagrams
heat realise
diesel engine
Opis:
The results of investigation of 1,9 TDI engine (285 Nm, 85 kW, type AJM without any modification) equipped with injection units supplied conventional diesel fuel (ON) or B100 fuel (RME) have been presented in article. Investigations have been realized at the engine speed of 2000 rpm and variable load within the range of 0 to 275 Nm. The pressure, temperature and heat release velocity runs have been subjected to analysis. Particular attention has been paid to the release of the heat used for the effective work and internal energy increase of the working medium (enthalpy) during combustion inside the engine cylinder versus the crank angle for both investigated fuels. It was found among the others that mentioned fuels differ in the heat release, heat velocity and the maximal combustion temperature, which for the B100 fuel is bigger than for the conventional diesel fuel. Bigger combustion dynamics of tested biofuel (compared with standard diesel fuel) results higher concentrations of Nitrogen Oxides NOx in exhaust gases. The easiest way is of course the use of the later start of fuel injection biofuels and/or increase the exhaust gas recirculation EGR. These treatments, however, result in a worsening of the energy performance of the engine. It was concluded also that the combustion of RME works properly at higher engine loads. Then reduce the negative difference between the combustion of biofuel (RME) and standard Diesel fuel.
Źródło:
Journal of KONES; 2013, 20, 4; 71-78
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
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