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Wyszukujesz frazę "Deniz, A." wg kryterium: Wszystkie pola


Tytuł:
Stability Analysis of Clamped Nonhomogeneous Shells on the Elastic Foundation
Autorzy:
Sofiyev, A.
Deniz, A.
Ozyigit, P.
Pinarlik, M.
Powiązania:
https://bibliotekanauki.pl/articles/1182908.pdf
Data publikacji:
2014-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.43.Bn
62.20.mq
Opis:
In the present study a theoretical analysis is presented for determining the stability characteristics of clamped non-homogeneous shells on the elastic foundation subjected to the lateral pressure. The basic equations have been derived for the shell, the Young modulus of which varies exponentially in the thickness direction and rests on the elastic foundation. By applying the Galerkin method to the basic equations, the expressions for the critical lateral pressure of the non-homogeneous shell with or without an elastic foundation are obtained. Finally, the effects of the non-homogeneity, elastic foundation and shell characteristics on the critical lateral pressure have been studied.
Źródło:
Acta Physica Polonica A; 2014, 125, 2; 459-461
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stability Analysis of FGM Layered Shells in the Surrounding Medium
Autorzy:
Sofiyev, A.
Schnack, E.
Deniz, A.
Zerin, Z.
Avcar, M.
Powiązania:
https://bibliotekanauki.pl/articles/1490962.pdf
Data publikacji:
2012-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.43.Bn
62.20.mq
Opis:
In this study, the stability analysis of three-layered shells containing a functionally graded material layer in the surrounding medium and subjected to the uniform lateral pressure is investigated. The surrounding elastic medium is modeled as a Pasternak foundation. The dimensionless critical lateral pressures of three-layered functionally graded material shells with and without elastic foundations are obtained. Effects of compositional profiles and elastic foundation on the dimensionless critical lateral pressures have been studied.
Źródło:
Acta Physica Polonica A; 2012, 121, 1; 162-164
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Buckling of Shear Deformable Functionally Graded Orthotropic Cylindrical Shells under a Lateral Pressure
Autorzy:
Sofiyev, A.
Deniz, A.
Mecitoglu, Z.
Ozyigit, P.
Pinarlik, M.
Powiązania:
https://bibliotekanauki.pl/articles/1193003.pdf
Data publikacji:
2015-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.43.Bn
62.20.mq
Opis:
In this study, the buckling of functionally graded (FG) orthotropic cylindrical shells with shear deformation subjected to a lateral pressure is discussed. The stability and compatibility equations for FG orthotropic cylindrical shells on the basis of first order shear deformation theory (FOSDT) are derived. The expressions for non-dimensional critical lateral pressure on the basis of FOSDT and classical shell theory (CST) are obtained. The parametric studies are carried out to investigate the influences of shear deformation, orthotropy and heterogeneity on the non-dimensional critical lateral pressure.
Źródło:
Acta Physica Polonica A; 2015, 127, 4; 907-909
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of the Non-Homogeneity and Elastic Medium on the Critical Torsional Load of the Orthotropic Cylindrical Shell footnotemark
Autorzy:
Sofiyev, A.
Deniz, A.
Avcar, M.
Özyigit, P.
Omurtag, M.
Powiązania:
https://bibliotekanauki.pl/articles/1400146.pdf
Data publikacji:
2013-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.43.Bn
62.20.mq
Opis:
In this study, the torsional stability problem of non-homogeneous orthotropic composite cylindrical shells in the elastic medium, using the Galerkin method was investigated. The Winkler model is used to describe the reaction of the elastic medium on the cylindrical shell. Mixed boundary conditions are considered. The effects of variations of shell parameters, non-homogeneity, orthotropy and foundation stiffness on the critical torsional load are examined.
Źródło:
Acta Physica Polonica A; 2013, 123, 4; 728-730
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Designing a Gateway Device for Internet of Things Applications
Autorzy:
Taşkın, Deniz
Çetingöz, Mustaf
Powiązania:
https://bibliotekanauki.pl/articles/102114.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
Bluetooth Low Energy
Internet of things
gateway
Bluetooth niskoenergetyczny
internet rzeczy
bramka
Opis:
BLE (Bluetooth Low Energy) technology is an ideal tool for implementing IoT (Internet of Things) applications, as it consumes little power and provides wireless communication. There are many applications using this technology already available on the market. These products are classified as personal applications while using the BLE-supported tablets or smartphones for transmitting data and are not institutional. There are numerous studies showing that the number of IoT sensors and devices will increase rapidly. However, personal approaches cannot manage a large number of devices. In this study, a BLE gateway device which interconnects BLE and WiFi networks was developed. This device is also capable of transmitting IoT node information to a server or cloud on the Internet. The proposed design uses only BLE and WiFi stack chips and does not require an additional microcontroller unit for running gateway applications. This makes the design cost-effective and power efficient, which are important for the IoT environment.
Źródło:
Advances in Science and Technology. Research Journal; 2019, 13, 1; 79-87
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vertical extension of a multi-storey reinforced concrete building
Autorzy:
Bahrami, A.
Deniz, S.
Moalin, H.
Powiązania:
https://bibliotekanauki.pl/articles/2174183.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
konstrukcja żelbetowa
ugięcie
budynek żelbetowy
vertical extension
reinforced concrete building
utilisation ratio
reaction force
deflection
Opis:
The global population is increasing annually; thus, there is a need for more housing and buildings worldwide. As cities grow outward and buildable lands become scarce, it is necessary to increase the height of existing buildings in cities, especially where the height of the buildings is low. For crowded cities, the storey extension is an increasingly popular measure that can meet market demand for centrally located houses. This paper examines the possibility of the vertical extension of an existing (reference) reinforced concrete building in Gävle in Sweden. The StruSoft FEM-Design program is employed to carry out the research. The building is firstly modelled, analysed, and designed completely. Thereafter, a storey extension is conducted vertically. The stresses and utilisation ratios of the load-bearing elements of the reference and extended buildings are assessed. It is found that some of the load-bearing elements of the building after the extension need strengthening. Different practical strengthening solutions are proposed. It is concluded that the building can successfully withstand the vertical extension after applying these proposed solutions. The maximum vertical reaction forces of the reference and extended buildings are obtained and compared. A comparison of the deflections of the buildings is made. The structural stability of the buildings is evaluated as well.
Źródło:
International Journal of Applied Mechanics and Engineering; 2022, 27, 1; 1--20
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Study of the Properties of Paper Sized with Styrene-Butyl Acrylate Copolymers
Autorzy:
Özdemir, M.
Özdemir Alp, M.
Aytaç, A.
Deniz, V.
Powiązania:
https://bibliotekanauki.pl/articles/1031427.pdf
Data publikacji:
2017-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
68.35.bm
68.47.Mn
81.05.Qk
Opis:
In this study, styrene 70 wt.%-butyl acrylate 30 wt.% copolymer-based surface-sizing materials were synthesized using semi-batch emulsion polymerization and applied on the paper. Four different emulsifiers, with different ethylene oxide numbers, at ratios of 10%, 7% and (2, 2'-azobis (2-methylpropionamidine) dihydrochloride (A)) as initiator were used for emulsion polymerization. Eight different copolymers were synthesized. Synthesized copolymers were used as surface sizing agents for the paper surface. Ion exchange capacity, pH, Fourier transform infrared spectroscopy, differential scanning calorimetry and thermal gravimetric analysis were used for the characterization of the copolymer properties. Contact angle measurements, Cobb test, and scanning electron microscopy analysis were carried out to determine the surface properties of the paper samples. Presence of copolymer formations was proven with the Fourier transform infrared analysis. Contact angle measurements of the copolymer sized paper surface have shown hydrophobic behaviour in samples, with the exception of E-3/7/A sample. The lowest Cobb value was observed for E-2/7/A sample. The highest thermal stability was also observed for E-2/7/A sample. The scanning electron micrographs show that the paper loses its fibrous structure and it is seen that the copolymer adheres to the fibrous tissue.
Źródło:
Acta Physica Polonica A; 2017, 132, 3; 1098-1101
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation into the surface properties of papers sized with styrene-acrylate-cationic monomer based terpolymers
Autorzy:
Özdemir, M.
Aytaç, A.
Deniz, V.
Powiązania:
https://bibliotekanauki.pl/articles/1050997.pdf
Data publikacji:
2017-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
68.47.Pe
82.35.-x
Opis:
In this study, styrene(St)/2-ethyl hexyl acrylate(2-EHA) based surface sizing materials were developed with four different cationic monomers (CM), namely diallyldimethyl ammonium chloride (DADMAC), [2-(methacryloyloxy) ethyl] trimethylammonium chloride (MATMAC), [3-(methacryloylamino) propyl]-trimethyl ammonium chloride (MAPTAC), (viniylbenzyl) trimethyl-ammonium chloride (VBTMAC). Ternary polymerization was realized with emulsion polymerization, by using 2,2'-azobis (2-methylpropionamidine) dihydrochloride (A) as initiator. Thermal properties of the synthesized terpolymers were determined with differential scanning calorimeter and thermal gravimetric analysis. Differential scanning calorimeter results showed that glass transition temperature (T_{g}) values of polymers were not dependent on the types of cationic monomers, and were found about 44-45°C. Ion exchange capacities of the terpolymers were determined. The latexes produced were used as sizing materials for paper surface treatment. Then critical surface properties of the papers sized such as water resistance (Cobb value) and contact angle were measured. It was found that the best, i.e. the lowest Cobb results were obtained when MATMAC and MAPTAC cationic monomers were used in terpolymers.
Źródło:
Acta Physica Polonica A; 2017, 131, 1; 178-181
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An extension of the univalence criterion for a family of integral operators
Autorzy:
Deniz, Erhan
Orhan, Halit
Powiązania:
https://bibliotekanauki.pl/articles/747246.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
Integral operator
analytic functions
univalent functions
open unit disk
univalence criterion
Opis:
The main object of the present paper is to extend the univalence condition for a family of integral operators. Relevant connections of some of the results obtained in this paper with those in earlier works are also provided.
Źródło:
Annales Universitatis Mariae Curie-Skłodowska, sectio A – Mathematica; 2010, 54, 2
0365-1029
2083-7402
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska, sectio A – Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Turkish EFL Learners’ Acquisition of Psych Verbs and Unaccusative Verbs: A Replication Study on Underpassivization and Overpassivization
Autorzy:
Tanyer, Seray
Deniz, Samet
Powiązania:
https://bibliotekanauki.pl/articles/2053532.pdf
Data publikacji:
2022-01-28
Wydawca:
Wydawnictwo Uniwersytetu Śląskiego
Tematy:
second language acquisition
psych verbs
unaccusative verbs
underpassivization
overpassivization
Opis:
The processability account anticipates that learners will make more underpassivization errors than overpassivization errors since passivization entails more processing. Although one study on psych-verbs and a few on unaccusatives examined Turkish L2 learners’ acquisition, no research compared a single set of learners’ acquisitions of these verbs together from a processing point of view. In this regard, the current study aims to investigate whether the processing complexity of passivization influences acquisition of psych and unaccusative verbs. It also questions whether general accuracy levels in Grammaticality Judgement Task (GJT) and degree of familiarity with target verbs are related to their level of accuracy with individual psych and unaccusative verbs. 33 undergraduate-level university students performed on the GJT and a Word Familiarity Rating Task (WFRT). The GJT included 38 items with 12 sentences for psych-verbs, 12 sentences for unaccusative-verbs, 12 sentences for distracters and 2 sentences for examples. The WFRT was a survey questioning familiarity with 6 psych and 6 unaccusative verbs. To analyse the data, a set of nonparametric tests and descriptive statistics were used. The results revealed that learners performed mor The processability account anticipates that learners will make more underpassivization errors than overpassivization errors since passivization entails more processing. Although one study on psych-verbs and a few on unaccusatives examined Turkish L2 learners’ acquisition, no research compared a single set of learners’ acquisitions of these verbs together from a processing point of view. In this regard, the current study aims to investigate whether the processing complexity of passivization influences acquisition of psych and unaccusative verbs. It also questions whether general accuracy levels in Grammaticality Judgement Task (GJT) and degree of familiarity with target verbs are related to their level of accuracy with individual psych and unaccusative verbs. 33 undergraduate-level university students performed on the GJT and a Word Familiarity Rating Task (WFRT). The GJT included 38 items with 12 sentences for psych-verbs, 12 sentences for unaccusative-verbs, 12 sentences for distracters and 2 sentences for examples. The WFRT was a survey questioning familiarity with 6 psych and 6 unaccusative verbs. To analyse the data, a set of nonparametric tests and descriptive statistics were used. The results revealed that learners performed more accurately on unaccusatives than on psych-verbs. They did more underpassivization errors by accepting ungrammatical active constructions of psych verbs. Their performances on psych and unaccusative verbs went parallel with their general accuracy levels in GJT while their degree of familiarity with and accuracy level for two verbs do not correlate with each other.The results suggest that such factors as processability and L1 transfer seem to impact the acquisition. Keywords:Second language acquisition; psych verbs; unaccusative verbs; underpassivization; overpassivization. e accurately on unaccusatives than on psych-verbs. They did more underpassivization errors by accepting ungrammatical active constructions of psych verbs. Their performances on psych and unaccusative verbs went parallel with their general accuracy levels in GJT while their degree of familiarity with and accuracy level for two verbs do not correlate with each other.The results suggest that such factors as processability and L1 transfer seem to impact the acquisition. Keywords:Second language acquisition; psych verbs; unaccusative verbs; underpassivization; overpassivization.
Źródło:
Theory and Practice of Second Language Acquisition; 2022, 8, 1; 129-155
2450-5455
2451-2125
Pojawia się w:
Theory and Practice of Second Language Acquisition
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An evaluation of a modified product size distribution model based on t-family curves for three different crushers
Autorzy:
Umucu, Y.
Deniz, V.
Unal, N.
Powiązania:
https://bibliotekanauki.pl/articles/110242.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
crusher
drop weight tests
t-family
size distribution
Opis:
Crushing is a process which is widely used in mineral processing plants, cement factories, aggregates plants and some other industrial plants. Specific fracture energy of the particles is not the only fundamental property that is important: the particle strength also plays a significant role in determining the overall comminution properties of the material. In the drop weight test, a known mass falls through a given height onto a single particle providing an event that allows characterization of the ore under impact breakage. It is known that there are many difficulties and problems in the drop weight and twin pendulum test methods such as being laborious, requiring long test time and requiring a special apparatus. In this study, breakage behavior of slag in different laboratory crushers was investigated. A new size distribution model equation was developed by a t-family value evaluation approach, and the validity of equation was tested.
Źródło:
Physicochemical Problems of Mineral Processing; 2013, 49, 2; 473-480
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Relationship Between Cement Quality and Separation Cut Size
Zależność pomiędzy jakością cementu a ziarnem podziałowym
Autorzy:
Umucu, Y.
Deniz, V.
Sarac, M. F.
Kuzgun, A. E.
Powiązania:
https://bibliotekanauki.pl/articles/318141.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Przeróbki Kopalin
Tematy:
produkcja
cement
jakość
separacja
wzbogacalnik powietrzny
cement production
cement quality
separation
cut size
air separator
Opis:
Cement is prepared by firing a mixture of raw materials, one of which is mainly composed of calcium carbonate and the other of aluminium silicate. The most familiar materials answering to this description are limestone and clay, both of which occur in nature in a great number of varieties. Marls, which are a mixture of clay and shales, are also common raw materials for cement. The production of cement is an energy-intensive process. The typical energy consumption of a modern cement plant is about 90–120 kWh per ton of produced cement. The service properties of cement such as workability and strength development are affected not only by the chemical and mineralogical composition but also to a great extent by the fineness and particle size distribution of the cement produced; in practice often only the strength development of cement is of primary interest. Yet the effect on workability is just as important. Moreover, the surface area and granulometric parameters may also directly or indirectly affect the frost resistance and other durability-related properties of concrete. There are process engineering options for controlling fineness and particle size distribution of the cement by changing the mode of operation of the mill and the separator. This paper describes a study of the relationship between cement strength and separation cut size (d50). The separation cut size (d50) of air separator products obtained by different days was ascertained by using particle size analysis. It was found that the cement fineness and separation cut size (d50) are very effective on the strength of cement.
Cement jest wylany z mieszanek surowców, zawierających węglan wapnia i glinokrzemiany. Najpowszechniejszymi surowcami są wapień i glina. Oba występują w naturze w dużych ilościach i wielu odmianach. Margle będące mieszaniną gliny i łupka ilastego, również są surowcem używanym do produkcji cementu. Proces produkcji cementu wymaga dużego nakładu energii. Standardowe zużycie energii w nowoczesnej fabryce wynosi około 90-120kWh na tonę wyprodukowanego cementu. Właściwości użytkowe cementu, takie jak urabialność czy wytrzymałość są zależne nie tylko od składu chemicznego i mineralogicznego, lecz również w dużej mierze od rozdrobnienia i rozkładu wielkości cząstek wyprodukowanego cementu; w praktyce często jedynie wytrzymałość cementu jest brana pod uwagę, jednakże, wpływ urabialności jest równie istotny. Ponadto, wielkość powierzchni i parametry granulometryczne mogą również bezpośrednio lub pośrednio wpływać na mrozoodporność i inne właściwości cementu związane z jego wytrzymałością. Istnieją sposoby metody sterowania rozdrobnieniem i rozkładem wielkości cząstek cementu za pomocą zmiany trybu pracy młyna i separatora. Praca opisuje badania nad związkiem między wytrzymałością cementu, a wielkością ziarna podziałowego (d50). Ziarno podziałowe (d50) produktów separatora powietrznego, uzyskane w różnych warunkach określono na podstawie analizy granulometrycznej.Wykazano, że uziarninie cementu oraz (d50) mają istotny wpływ na wytrzymałość cementu.
Źródło:
Inżynieria Mineralna; 2015, R. 16, nr 2, 2; 189-194
1640-4920
Pojawia się w:
Inżynieria Mineralna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Proposed Use of a Polyvinyl Alcohol with Grape Pomace Extract as an Edible Coating for Strawberries
Autorzy:
Kaynarca, Gulce B.
Kamer, Deniz D.
Yucel, Emel
Gümüş, Tuncay
Powiązania:
https://bibliotekanauki.pl/articles/16538543.pdf
Data publikacji:
2023-05-25
Wydawca:
Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
Tematy:
strawberry preservation
PVA
grape pomace extract
edible coating
fungal control
Opis:
Strawberries rich nutrition, flavor, and aroma profiles make them popular. Many studies have tried to extend strawberries shelf life. In the current study, grape pomace extract (GPE) was combined with polyvinyl alcohol (PVA) and used to extend the shelf life of strawberries. Ascorbic acid content, total phenolic content, total anthocyanin content, and antioxidant activity determinations showed that PVA/GPE-coated strawberries were superior to the uncoated fruits during storage. Total mesophilic aerobic bacteria (TMAB) and yeast/mold counts in the uncoated strawberries were 2 and 2.68 log cfu/g at the start of storage, respectively, and 9.8 and 14.00 log cfu/g after 16 days of storage, respectively. Strawberries coated with the PVA solution with 2.5% (w/v) GPE showed 32% and 25% less TMAB and yeast/mold counts, respectively, at the end of storage. The PVA/GPE-coated strawberries showed significantly higher firmness compared to the control fruit. The PVA/GPE coating improved strawberry shelf life and functional properties.
Źródło:
Polish Journal of Food and Nutrition Sciences; 2023, 73, 2; 151-162
1230-0322
2083-6007
Pojawia się w:
Polish Journal of Food and Nutrition Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A study simulation and modeling on the performance of the heavy media cyclone in coal beneficiation
Modelowanie i symulacja pracy cyklonu z cieczą ciężką w procesie wzbogacania węgla
Autorzy:
Umucu, Y.
Deniz, V.
Powiązania:
https://bibliotekanauki.pl/articles/348553.pdf
Data publikacji:
2012
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
węgiel
wymywalność
modelowanie
washability
coal
modeling
Opis:
In this study, time-dependent performance of heavy-medium cyclone were determined with sink-float testing of clean coal and schist samples taken from cyclone feeding at Buruyar coal company located at Manisa-Soma Region. Later, samples taken from coal mines located at Denizli-Civril region were firstly classified, and then subjected to float-sink test for washability assessment. Finally, hourly changes in the amount of clean coal and schist recovered from processing of Denizli-Civril coals with heavy media cyclone were determined using classic simulation and modeling methods depending on performance values of heavy-medium cyclone. Results obtained from both methods were compared.
W badaniu dokonano analizy pracy cyklonu z cieczą ciężką w zależności od czasu na przykładzie czystego węgla i próbek łupka pobranych z nadawy kierowanej do cyklonu w przedsiębiorstwie węglowym Buruyar, zlokalizowanym w rejonie Manisa-Soma. Następnie, próbki pobrane z kopalni z regionu Denizli-Civril poddano procesowi klasyfikacji i ocenie wymywalności. Na końcu, określono zmiany godzinowe w wielkości czystego węgla i łupka odzyskanego z procesów przeróbczych węgla z Denizli-Civril za pomocą cyklonu z cieczą ciężką. W tym celu zastosowano klasyczne metody symulacji i modelowania w zależności od parametrów cyklonu z cieczą ciężką. Wyniki otrzymane z obu metod zostały porównane.
Źródło:
AGH Journal of Mining and Geoengineering; 2012, 36, 4; 179-185
1732-6702
Pojawia się w:
AGH Journal of Mining and Geoengineering
Dostawca treści:
Biblioteka Nauki
Artykuł

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