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Wyszukujesz frazę "Sahin, M." wg kryterium: Autor


Tytuł:
Manipulation of Exchange Coupling in Py/Co/Cr Multilayer Thin Films
Autorzy:
Aköz, M.
Parlak, U.
Şahin, Y.
Tavşan, D.
Tarcan, E.
Öztürk, O.
Tokdemir Öztürk, S.
Erkovan, M.
Powiązania:
https://bibliotekanauki.pl/articles/1401229.pdf
Data publikacji:
2015-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.70.Cn
75.50.Cc
76.50.+g
Opis:
The main issue addressed in present study is exchange coupling modification between ferromagnetic layers through non-magnetic spacer layers using extra ultra-thin ferromagnetic layers (Co). In order to achieve this goal, we prepared Cr(50 Å) / Py(20 Å) / Co(5 Å) / Cr(7, 10, 13 Å) / Co(5 Å) / Py (30 Å) / Cr(50Å) / Si using magnetron sputtering at UHV conditions and characterized by Ferromagnetic Resonance (FMR) technique. As the present study results were compared to our previous study on (Py/Cr), the exchange coupling energy was increased ten times with the cobalt thin layer
Źródło:
Acta Physica Polonica A; 2015, 127, 4; 992-994
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of Surface Properties of Four Tooth-Colored Restorative Materials
Autorzy:
Arslanoglu, Z.
Altan, H.
Sahin, O.
Tekin, M.
Adigüzel, M.
Powiązania:
https://bibliotekanauki.pl/articles/1402359.pdf
Data publikacji:
2015-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
87.85.J-
62.20.-x
Opis:
The aim of this study is to compare microhardness, roughness and micromorphology of the examined materials of a newly developed glass carbomer dental filling material to two different resin modified glass ionomers and a glass ionomer dental filling material. Specimens tested were prepared from a glass carbomer without gloss (Glass Carbomer, GCP), a glass carbomer (Glass Carbomer, GCP) with gloss, two different resin modified glass ionomers (Fuji II LC, GC and Riva LC, SDI) and a glass ionomer (Equia, GC). Seven specimens of each material were prepared according to manufacturer's recommendations. After setting, samples were polished and stored in 37°C distilled water for 24 h. Indentation microhardness of examined restorative materials was measured using the Vickers indenters. In addition surface roughness of the materials was measured using surface profilemeter. Surface morphology was analyzed by using scanning electron microscopy. There was a significant difference in microhardness and roughness between the restorative materials (p<0.05). The highest microhardness was measured for Equia and lowest for glass carbomer with gloss. The roughness was fully definite for the glass carbomer with gloss and indefinite for the glass carbomer without gloss. Small cracks and voids were observed in all groups. High viscosity glass ionomer cement Equia exhibits the high physical strength than RMGIC. Gloss application does not influence the hardness behavior of GCP.
Źródło:
Acta Physica Polonica A; 2015, 128, 2B; B-310-B-313
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Surfactant Types on the Size of Tin Oxide Nanoparticles
Autorzy:
Boran, F.
Çetinkaya, S.
Şahin, M.
Powiązania:
https://bibliotekanauki.pl/articles/1031632.pdf
Data publikacji:
2017-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
nanoparticle
tin oxide
surfactant
Opis:
In this study, tin oxide (SnO₂) nanoparticles were synthesized by hydrothermal method in the presence of hydrazine and ammonia by adding surfactant for 12 h in a Teflon autoclave at 100°C reaction temperature. Tin(II) chloride hydrate as an inorganic precursor, hexadecyl trimethyl ammonium bromide (CTAB), and tetrapropyl ammonium bromide (TPAB) as cationic, and sodium dodecyl sulfonate (SDS) as anionic surfactants were used. The results showed that the size and shape of nanoparticles depended on the surfactant types. The nanoparticles sizes between 17.5 and 19.7 nm were obtained by changing types of surfactants. Synthesized tin oxide nanoparticles were characterized by field emission scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and the Fourier transform infrared spectroscopy.
Źródło:
Acta Physica Polonica A; 2017, 132, 3; 546-548
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of CaO on the nanohardness behaviour of AZ63 magnesium alloys produced by mechanical alloying method
Autorzy:
Boztas, M.
Ozarslan, S.
Sahin, O.
Powiązania:
https://bibliotekanauki.pl/articles/1068219.pdf
Data publikacji:
2016-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
62.20.-x
87.85.J
Opis:
In this study we aimed to produce AZ63 magnesium alloys containing different amounts of CaO, to investigate the nanohardness behaviour of the resulting alloys. These alloys were produced by mechanical alloying under argon atmosphere. Magnesium based alloys with the initial CaO content of 0.1%, 0.3%, and 0.5% were produced by high-energy ball milling, followed by process that involved cold pressing and sintering. These alloys were characterized using scanning electron microscopy, scanning probe microscopy, X-ray diffraction, and nanoindentation methods. Unloading segments of nanoindentation curves were analyzed using Oliver-Pharr method. Experimental results show that measured nanohardness exhibits a peak load dependence. As a result, in these alloys the microstructure and nanohardness depend on the content of CaO.
Źródło:
Acta Physica Polonica A; 2016, 130, 1; 357-361
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Radiation Shielding Properties of Spark Plasma Sintered Boron Carbide-Aluminium Composites
Autorzy:
Buyuk, B.
Tugrul, A.
Cengiz, M.
Yucel, O.
Goller, G.
Sahin, F.
Powiązania:
https://bibliotekanauki.pl/articles/1401941.pdf
Data publikacji:
2015-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
25.20.Dc
81.05.Je
Opis:
In this study gamma and neutron attenuation properties of boron carbide-aluminium (B₄C-Al) composites were investigated. B₄C-Al composites were produced by spark plasma sintering method. Aluminum percentages in the B₄C-Al composites were 0%, 10%, 15%, and 20% by volume. The composite materials were performed against gamma and neutron sources. Cs-137 and Co-60 gamma radioisotopes were used as gamma sources and Pu-Be neutron howitzer was used for neutron source. Theoretical mass attenuation coefficients were determined by using XCOM computer code and compared with the experimental results. It has been seen that the experimental results were close to the theoretical results. Total macroscopic cross-sections of the samples were determined for Pu-Be neutrons. It is concluded that increasing aluminum ratio in the B₄C-Al composites causes higher gamma attenuation behavior for Cs-137 and Co-60 gamma sources and the total macroscopic cross-sections of the B₄C-Al composites decrease by increasing Al concentration.
Źródło:
Acta Physica Polonica A; 2015, 128, 2B; B-132-B-134
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Processing, Mechanical and Nuclear Characterization of Boron Carbide Ceramics Consolidated by Spark Plasma Sintering
Autorzy:
Cengiz, M.
Ozer, S.
Buyuk, B.
Tugrul, A.
Yucel, O.
Goller, G.
Sahin, F.
Powiązania:
https://bibliotekanauki.pl/articles/1401969.pdf
Data publikacji:
2015-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
25.20.Dc
81.20.Ev
Opis:
Boron carbide (B₄C) ceramics were produced by spark plasma sintering technique with 5, 10, 15, and 20 vol.% aluminum (Al) in order to improve sintering behaviours of B₄C ceramics. B₄C ceramics were produced, having square cross-section and 50 × 50 × 5 mm³ dimensions. The sintering process was carried out at different temperatures by applying 40 MPa of pressure with 100°C/min under vacuum. The effects of various amounts of Al additive and sintering temperature on density, vickers hardness, fracture toughness and microstructure were examined. The hardness and fracture toughness of the samples were evaluated by the Vickers indentation technique. Microstructures of the samples were characterized by scanning electron microscopy technique. Fast neutron attenuation properties of the ceramics having highest density were also investigated.
Źródło:
Acta Physica Polonica A; 2015, 128, 2B; B-187-B-189
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spark Plasma Sintering of Boron Carbide Ceramics Using Different Sample Geometries and Dimensions
Autorzy:
Cengiz, M.
Yavas, B.
Celik, Y.
Goller, G.
Yucel, O.
Sahin, F.
Powiązania:
https://bibliotekanauki.pl/articles/1216387.pdf
Data publikacji:
2014-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.20.Ev
81.05.Je
Opis:
$B_4C$ ceramics were fabricated by spark plasma sintering technique at 1700°C-1800C for 5 min under applied pressure of 50 MPa under vacuum atmosphere. Two different grades of $B_4C$ powder from H.C. Starck Company namely HP grade and HS grade were used in all related experiments. Effect of sample geometry and dimensions as well as sample thickness on sintering parameters were analyzed. Samples having 5 mm thickness and 50 mm diameter, 8 mm thickness in circular geometries and 50 × 50 square cross-section, 8 mm thickness were fabricated. Using the powder, which provided the densest sample, yttrium oxide $(Y_2O_3)$ was added, mixed and sintered. Optimization of SPS method production parameters for pure $B_4C$ samples and $B_4C$ samples with 5 wt% yttrium oxide additive were accomplished. The effect of geometry on density, Vickers hardness, fracture toughness, and microstructure were examined. The hardness and fracture toughness values of the samples were evaluated by the Vickers indentation technique.
Źródło:
Acta Physica Polonica A; 2014, 125, 2; 260-262
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spark Plasma Sintering of Boron Carbide Ceramics Using Metallic Silicon in Square Cross Section
Autorzy:
Cengiz, M.
Sahin, F.
Powiązania:
https://bibliotekanauki.pl/articles/1401426.pdf
Data publikacji:
2015-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.20.Ev
Opis:
B₄C ceramics were fabricated by spark plasma sintering (SPS) technique with 5 vol.% silicon as sintering additive. Optimization of SPS method production parameters for B₄C ceramics having geometries 50×50×5 mm, square cross section will be performed. The sintering process was carried out at different temperatures by applying 40 MPa of pressure under vacuum atmosphere. The effect of silicon additive, sintering temperature and different soaking times on density, vickers hardness, fracture toughness and microstructure were examined. The mechanical properties of the B₄C ceramics having silicon as additive were compared with the results of monolithic B₄C. The hardness and fracture toughness of the samples were evaluated by the vickers indentation technique. Microstructures of spark plasma sintered B₄C samples with different parameters in square cross section were characterized by using SEM technique.
Źródło:
Acta Physica Polonica A; 2015, 127, 4; 1370-1372
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Identification of bean genotypes from turkey resistance to common bacterial blight and halo blight diseases
Identyfikacja odorności genotypów fasoli z Turcji na zgorzel bakteryjną i zarazę
Autorzy:
Donmez, M.F.
Sahin, F.
Elkoca, E.
Powiązania:
https://bibliotekanauki.pl/articles/11542438.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Opis:
Bean diseases caused by different pathogens reduce important yield and quality of beans in different bean growing regions in both Turkey and the other bean producing countries. In the present study, bacterial pathogens in the species of Pseudomonas savastanoi pv. phaseolicola (Burkholder) Garden et al. and Xanthomonas axonopodis pv. Phaseoli (Smith) Vauterin et al. causing economically important disease on bean plants growing in the commercial fields of Erzurum and Erzincan provinces located in the Eastern Anatolia region of Turkey has been isolated and identified. Totally thirty-six bean genotypes and two commercial cultivars commonly grown in the region have been screened for resistance to these pathogens both in greenhouse and field condition during 2001–2002. Disease severity in the field condition reduced seed quality and quantity of bean. Among the thirty-eight genotypes tested, only 36K was found to be resistant to both of the pathogens. Bean diseases caused by different pathogens reduce important yield and quality of beans in different bean growing regions in both Turkey and the other bean producing countries. In the present study, bacterial pathogens in the species of Pseudomonas savastanoi pv. phaseolicola (Burkholder) Garden et al. and Xanthomonas axonopodis pv. Phaseoli (Smith) Vauterin et al. causing economically important disease on bean plants growing in the commercial fields of Erzurum and Erzincan provinces located in the Eastern Anatolia region of Turkey has been isolated and identified. Totally thirty-six bean genotypes and two commercial cultivars commonly grown in the region have been screened for resistance to these pathogens both in greenhouse and field condition during 2001–2002. Disease severity in the field condition reduced seed quality and quantity of bean. Among the thirty-eight genotypes tested, only 36K was found to be resistant to both of the pathogens.
Choroby fasoli spowodowane różnymi patogenami zmniejszają plon i jakość fasoli w różnych regionach, gdzie uprawia się tą roślinę, zarówno w Turcji, jak i innych krajach produkujących fasolę. W niniejszym badaniu wyizolowano i zidentyfikowano patogeny bakteryjne u gatunku Pseudomonas savastanoi pv. phaseolicola (Burkholder) Garden et al. and Xanthomonas axonopodis pv. Phaseoli (Smith) Vauterin et al. powodującego ekonomicznie ważną chorobę roślin fasoli rosnących na polach komercyjnych w prowincjach Erzurum i Erzincan znajdujących się w regionie Wschodniej Anatolii w Turcji. Przebadano ogółem trzydzieści sześć genotypów fasoli oraz dwie odmiany powszechnie uprawiane w tym regionie w latach 2002–2002 pod kątem ich odporności na te patogeny, zarówno w warunkach szklarniowych, jak i polowych. Nasilenie choroby w warunkach polowych zmniejszyło jakość i ilość nasion fasoli. Pośród trzydziestu ośmiu zbadanych genotypów, stwierdzono, że tylko 36K jest odporny na obydwa patogeny.
Źródło:
Acta Scientiarum Polonorum. Hortorum Cultus; 2013, 12, 4; 139-151
1644-0692
Pojawia się w:
Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of GSM, LTE and Wi-Fi Electromagnetic Radiation in Dwellings
Autorzy:
Karan, Y.
As, N.
Şahın, M.
Powiązania:
https://bibliotekanauki.pl/articles/1031943.pdf
Data publikacji:
2017-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
wireless network adapter
electromagnetic radiation
electromagnetic pollution
global system for mobile communications
wireless fidelity
Opis:
Electromagnetic radiation exposure increases with the rise of the wireless communication devices. Electromagnetic radiation, especially near 2400 MHz band, has gradually increased with the widespread of wireless fidelity adapter in indoor environment. In this study, electromagnetic radiation in dwellings where different Wi-Fi adapters and routers are used was assessed by measuring the electric field and compared with other electromagnetic radiation source and the limits set by the Information and Communication Technologies Authority. Measurements were taken in the range of 760-2690 MHz bands used by GSM, 3G/LTE and Wi-Fi technologies. The detected values for all frequencies are significantly lower than the limits of the Information and Communication Technologies Authority. Among the electromagnetic radiation sources, electromagnetic radiation of Wi-Fi adapter is higher than GSM/3G/LTE sources radiation in dwellings. Electromagnetic radiation values in nearest point of high power adapter Wi-Fi antenna are close to the Information and Communication Technologies Authority limit value. Results show that electromagnetic radiation based on Wi-Fi adapters or routers can be higher than GSM based electromagnetic radiation.
Źródło:
Acta Physica Polonica A; 2017, 132, 3; 509-512
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design of a Laboratory Unit Air-Conditioning System with Matlab/Simulink Software
Autorzy:
Koçyiğit, N.
Şahin, M.
Powiązania:
https://bibliotekanauki.pl/articles/1031881.pdf
Data publikacji:
2017-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
07.05.Tp
07.20.-n
07.20.Mc
Opis:
In this study, design of an electronic air-conditioning system was carried out using Matlab/Simulink software. The air-conditioning system was designed as a laboratory experimental setup. The aim of this study was to revise and to reuse an outdated air-conditioning laboratory unit, by using improved methods. General equations were defined separately for each part and cell of this air conditioning system. Using these equations Matlab/Simulink models for every component were created. The Matlab/Simulink models were combined and verified with theoretical results. The simulation results show that theoretical results are compatible with the simulation results. These results were tested for input and output air enthalpy values and for humidity values. In addition, air mass flow rates for the number of different fan speeds were compared. The coherent simulation results showed that the general model of the air conditioning system, designed in Matlab/Simulink, behaves correctly. This model will be used in the future studies for comparison of real system results with simulation results.
Źródło:
Acta Physica Polonica A; 2017, 132, 3; 839-842
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effects of different pruning treatments on the growth, fruit quality and yield of 'Hacihaliloglu' apricot
Wpływ różnych zabiegów cięcia na wzrost, jakość i plon owoców moreli ‘Hacihaliloglu’
Autorzy:
Naim Demirtas, M.
Bolat, I.
Ercisli, S.
Ikinci, A.
Olmez, H.A.
Sahin, M.
Altindag, M.
Celik, B.
Powiązania:
https://bibliotekanauki.pl/articles/11541916.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:
pruning treatment
plant cultivar
plant growth
fruit quality
fruit yield
Hacihaliloglu cultivar
apricot
Prunus armeniaca
summer pruning
winter pruning
pomology
Turkey
Opis:
This study was conducted in Malatya, between 1999 and 2003, and the region's most important dried apricot variety, Hacihaliloglu was used as material. In the study, the effect of 5 different combined or alone pruning treatments on the growth, fruit quality and yield characteristics were determined in comparison with non-pruned trees. Pruning treatments in different periods did not statistically affect phenological features and fruit dimensions but strongly affected total soluble solid and fruit firmness of Hacihaliloglu apricot cultivar. The highest average yield considering trunk cross-sectional area was obtained as 0.34 kg·cm-2 from pre-harvest summer pruning treatment and the highest share of flower bud was observed as 68.29% in pre-harvest summer+winter pruning treatment. Pruning applications significantly affected both shoot diameter and length. The highest shoot diameter and length were obtained from pre-harvest summer+winter pruning application as 8.52 mm and 77.84 cm, respectively. The highest leaf area was determined as 39.43 cm2 in post harvest pruning treatment.
Badanie przeprowadzono w miejscowości Malatya w latach 1999–2003 na najważniejszej w regionie odmianie moreli do suszenia, Hacihaliloglu. W badaniu określono wpływ 5 różnych zabiegów cięcia na wzrost, jakość owoców oraz plonowanie w porównaniu z drzewami nieprzycinanymi. Zabiegi cięcia w różnych okresach nie wpłynęły w sposób istotny na cechy fenologiczne ani rozmiary owoców, natomiast wywarły silny wpływ na zawartość ekstraktu w soku oraz jędrność owoców moreli odmiany Hacihaliloglu. Najwyższy średni plon, 0,34 kg·cm-2 przy uwzględnieniu powierzchni przekroju poprzecznego pnia osiągnięto przy letnim przycinaniu po zbiorze owoców, a największy udział pąków – 68,29%, – zaobserwowano przy przedzbiorczym zabiegu cięcia lato+zima. Zastosowanie cięcia istotnie wpłynęło zarówno na średnicę pędów jak i ich długość. Największą średnicę i długość pędów, odpowiednio 8,52 mm i 77,84 cm, otrzymano stosując przedzbiorcze cięcie lato+zima. Największą powierzchnię liścia, 39,43 cm2 uzyskano przy pozbiorczym zabiegu cięcia.
Źródło:
Acta Scientiarum Polonorum. Hortorum Cultus; 2010, 09, 4; 183-192
1644-0692
Pojawia się w:
Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of natural minerals (zeolite and bentonite) for nitrogen compounds adsorption in different water temperatures suitable for aquaculture
Autorzy:
Sahin, D.
Oz, M.
Sertasi, E.
Oz, U.
Karsli, Z.
Aral, O.
Powiązania:
https://bibliotekanauki.pl/articles/10976.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Źródło:
International Letters of Natural Sciences; 2018, 71
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prediction of Fracture Stress with Regard to Porosity in Cast A356 Alloy
Autorzy:
Sahin, H.
Atik, M.
Tezer, F.
Temel, S.
Aydin, O.
Kesen, O.
Gursoy, O.
Dispinar, Derya
Powiązania:
https://bibliotekanauki.pl/articles/2079787.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
A356
casting defects
mechanical properties
porosity
fracture stress
Bifilm
stop A356
wady odlewnicze
właściwości mechaniczne
porowatość
naprężenia
Opis:
Production of the defect-free casting of aluminium alloys is the biggest challenge. Porosity is known to be the most important defect. Therefore, many cast parts are subjected to several non-destructive tests in order to check their acceptability. There are several standards, yet, the acceptance limit of porosity size and distribution may change according to the customer design and requirements. In this work, the aim was targeted to evaluate the effect of size, location, and distribution of pores on the tensile properties of cast A356 alloy. ANSYS software was used to perform stress analysis where the pore sizes were changed between 0.05 mm to 3 mm by 0.05 mm increments. Additionally, pore number was changed from 1 to 5 where they were placed at different locations in the test bar. Finally, bifilms were placed inside the pore at different sizes and orientations. The stress generated along the pores was recorded and compared with the fracture stress of the A356 alloy. It was found that as the bifilm size was getting smaller, their effect on tensile properties was lowered. On the other hand, as bifilms were larger, their orientation became the dominant factor in determining the fracture.
Źródło:
Archives of Foundry Engineering; 2021, 21, 4; 21-28
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł

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