Wszystkie pola: Zieba, P. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Recent Developments on Discontinuous Precipitation
Autorzy:: Zięba, P.
Powiązania:: https://bibliotekanauki.pl/articles/353282.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: discontinuous precipitation
discontinuous coarsening
grain boundary diffusion
Opis:: The discontinuous precipitation (DP) belongs to a group of diffusive solid state phase transformations during which the formation of a new phase is heterogeneous and limited to a migrating reaction front (RF). The use of analytical electron microscopy provided reliable information that there is no differences in the diffusion rate at the stationary grain boundary and moving RF of DP reaction. On the other hand, the use of “in situ” transmission electron microscopy observations indicated the importance of stop- go motion or oscillatory movement of the RF. During 2004-2016 period more or less 280 papers were published in which the terms “discontinuous precipitation, “cellular precipitation”, discontinuous coarsening” appeared either in the abstract or in key-words. In the present contribution, the research on the DP reaction will be reviewed taking into account new aspects of theories and modelling, new evidences and findings, effect of various factors including third element, external stresses, plastic deformation and GB orientation, occurrence in less known systems and alloys like: superalloys, nitrided Fe-based alloys and Cu-based alloys. Finally, some suggestions for the future research will be formulated.
Źródło:: Archives of Metallurgy and Materials; 2017, 62, 2A; 955-968
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Undulator-Like Radiation and Cooperative Phenomenon in Semiconductor Microstructure with Grating
Autorzy:: Tralle, I.
Zięba, P.
Powiązania:: https://bibliotekanauki.pl/articles/1490209.pdf
Data publikacji:: 2012-02
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 41.60.-m
42.50.Gy
73.61.Ey
73.40.kp
73.50.Fq
Opis:: In the article the cooperative $N^2$-effect is considered, that is the radiation whose power is ım $N^2$, where N is the number of emitters which in this case is equal to the number of electrons in a bunch. The suggested effect is the result of combining two other effects, Gunn-effect in GaAs and undulator-like radiation which can be produced by means of microstructure with grating (microundulator). It is very probable that the effect can be used for the developing of a new semiconductor-based room temperature source of the THz radiation.
Źródło:: Acta Physica Polonica A; 2012, 121, 2; 522-526
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Undulator-Like Radiation and N² Effects in Semiconductor Microstructures with Grating
Autorzy:: Tralle, I.
Zięba, P.
Powiązania:: https://bibliotekanauki.pl/articles/1402586.pdf
Data publikacji:: 2015-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 41.60.-m
42.50.Gy
73.61.Ey
73.40.kp
73.50.Fq
Opis:: In the article the cooperative N²-effects are considered, that is the radiation whose power is ım N², where N is the number of emitters which in this case is equal to the number of electrons in a bunch. The suggested effects are the result of combining two effects: the Gunn-effect in GaAs and undulator-like radiation, or "pumping wave" acting on the electrons and which is the result of undulator field, while the second is the backward effect of radiation which is produced by electrons moving within such microundulator. It is very probable that the effects can be used for the developing of a new semiconductor-based room temperature source of the THz-radiation.
Źródło:: Acta Physica Polonica A; 2015, 128, 2; 228-230
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Comparison of Methods for Determining the Contrast Distribution in Interference Images with Speckle Noise
Autorzy:: Pyziak, L.
Matczak, M.
Zięba, P.
Powiązania:: https://bibliotekanauki.pl/articles/1032503.pdf
Data publikacji:: 2017-07
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 42.25.Hz
42.30.-d
42.30.Kq
42.30.Ms
Opis:: Information about certain physical states of an examined object is encoded in the distribution of the fringe contrast in the metrological interference images of the object. Determining the contrast is one of the steps of converting the image into the distribution of the measured quantity in holographic fringe-contrast interferometry. In this paper, three methods of determining the fringe contrast in interference images containing speckle noise are compared. As the criterion for comparing the methods, the mean absolute error has been used. It turns out, in accordance with this criterium, the most effective method is the phase-shifting one.
Źródło:: Acta Physica Polonica A; 2017, 132, 1; 173-175
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Silicon solar cells efficiency improvement by the wet chemical texturization in the HF/HNO3/diluent solution
Poprawa sprawności krzemowych ogniw słonecznych poprzez chemiczna tekturyzację w roztworach HF/HNO3/rozpuszczalnik
Autorzy:: Kulesza, G.
Panek, P.
Zięba, P.
Powiązania:: https://bibliotekanauki.pl/articles/351196.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: teksturyzacja
wytrawianie kwasem
krzem multikrystaliczny
krzemowe ogniwa słoneczne
fotowoltaika
texturization
acid etching
multicrystalline silicon
silicon solar cells
photovoltaics
Opis:: The paper presents the results of the texturization process of the multicrystalline silicon wafers carried out in ternary HF/HNO3/diluent solution, where the diluent was either CH3COOH or H2O, at varying HF/HNO3 volume ratio and different time of texturization process. The technique of scanning electron microscopy was used to characterize the morphology of the obtained multicrystalline silicon surfaces, with subsequent surface reflectivity measurements. The appropriate selection of mixture components lead to a significant reduction in the reflectivity of the incident solar radiation in the relatively short time of 60 seconds. The resultant electric parameters were nearly the same as those for the commercial samples but obtained after 3 minutes.
Autorzy zaprezentowali wyniki badań dotyczących procesu teksturyzacji w roztworze HF/HNO3/rozpuszczalnik stosowanego dla płytek krzemu multikrystalicznego, gdzie jako rozpuszczalnik stosowano zamiennie CH3COOH oraz H2O. W badaniach jako zmienne przyjęto objętościowy stosunek HF/HNO3 oraz czas procesu. Morfologia powierzchni uzyskana po chemicznej modyfikacji krzemu została scharakteryzowana przy użyciu skaningowej mikroskopii elektronowej, a następnie zbadano wpływ takiego ukształtowania powierzchni na odbicie promieniowania słonecznego. Autorzy wykazali, że odpowiednie dobranie składu mieszaniny trawiącej pozwala na uzyskanie najniższych wartości odbicia w stosunkowo krótkim czasie 60 sekund. Ponadto parametry elektryczne zmodyfikowanych ogniw słonecznych nie odbiegały od tych uzyskanych komercyjnie w czasie trzykrotnie dłuższym.
Źródło:: Archives of Metallurgy and Materials; 2013, 58, 1; 291-295
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Infrastruktura rowerowa jako element systemu transportowego Radomia
Bicycle infrastructure as an element of transport system Radom
Autorzy:: Dębowska-Mróz, M.
Kacprzak, M.
Zięba, P.
Powiązania:: https://bibliotekanauki.pl/articles/310613.pdf
Data publikacji:: 2016
Wydawca:: Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:: infrastruktura rowerowa
system transportowy
ruch rowerowy
badanie ankietowe
bicycle infrastructure
transport system
cycling
survey
Opis:: W artykule omówiono podstawowe problemy związane z funkcjonowaniem systemu transportowego w miastach. Podjęto próbę zidentyfikowana istotnych aspektów dotyczących wykorzystania ruchu rowerowego do realizacji codziennych przemieszczeń w odniesieniu do całego roku kalendarzowego. Przedstawiono również wyniki zrealizowanego badania ankietowego, którego celem było poznanie ocen i preferencji dotyczącej funkcjonowania transportu rowerowego w miastach.
The article discusses the basic problems relating to the functioning of the transport system in cities. Attempted identified the relevant aspects related to the use of cycling to perform everyday movements for the whole calendar year. It also presents the outcomes of the survey, the aim of which was to learn the evaluations and preferences concerning the functioning of cycling in cities.
Źródło:: Autobusy : technika, eksploatacja, systemy transportowe; 2016, 17, 12; 573-580
1509-5878
2450-7725
Pojawia się w:: Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: New type of composite gyrotropic metamaterial
Autorzy:: Paśko, W.
Zięba, P.
Tralle, I.
Çoruh, A.
Powiązania:: https://bibliotekanauki.pl/articles/1055044.pdf
Data publikacji:: 2017-07
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 81.05.Xj
81.05.Zx
78.67.Pt
42.70.-a
Opis:: In this work we examined the possibility of fabricating the metamaterial in a relatively simple way. Our idea was to use the three-component mixture of ingredients, where one of them is responsible for the negative permeability μ(ω) of hypothetical metamaterial, while the other two cause the negative value of effective permittivity ε(ω). In our previous work, we considered Hg_{1-x}Cd_xTe semiconductor compound as one of the ingredients of mixture. As fabrication of the Hg_{1-x}Cd_xTe is related to using mercury which is very poisoning, we tried to exclude this material. In the work we proved by numerical simulations the possibility of substituting mercury cadmium telluride by Pb_{1-x}Sn_xTe. We have shown by computer simulations that by the proper fitting of the parameters, e.g. the radius of nanoparticles, their magnetic moments, the relative concentration of ingredients, etc., it is possible to obtain the metamaterial with negative refraction index in a relatively broad range of temperatures and magnetic fields. The last seems to be very promising in terms of practical applications of metamaterials.
Źródło:: Acta Physica Polonica A; 2017, 132, 1; 121-123
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Exciton Binding Energy and Oscillator Strength in a Shallow Quantum Well in an External Magnetic Field
Autorzy:: Zięba, P.
Piętka, B.
Łusakowski, J.
Tralle, I.
Powiązania:: https://bibliotekanauki.pl/articles/1402589.pdf
Data publikacji:: 2015-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.35.Ji
75.75.-c
73.21.Fg
62.20.-x
Opis:: We discuss the influence of an external magnetic field on the exciton energy and the exciton oscillator strength in the shallow quantum wells. We include into consideration the Coulomb attraction between electron and hole, which is rarely taken into account. We self-consistently solve the Schrödinger equation to compare the obtained results with the experimental values.
Źródło:: Acta Physica Polonica A; 2015, 128, 2; 237-239
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Metrological Aspects Of Evaluation of Glass Types Used in Photovoltaic Modules in Laboratory Scale
Autorzy:: Starowicz, Z. M.
Drabczyk, K.
Gawlińska, K.
Zięba, P.
Powiązania:: https://bibliotekanauki.pl/articles/220981.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: photovoltaics
silicon solar cells
module glass cover
lamination process
Opis:: The front glass cover is the crucial part of commercially available silicon solar modules as it provides mechanical protection and environmental isolation. However, from a utility point of view the most important thing is how the glass cover influences the power generation of a photovoltaic (PV) module. Optical matching of the whole structure determines the number of photons absorbed by the solar cells and hence the produced photocurrent. In this study five types of PV glass were optically measured and characterized to find out useful information on transmittance and its character. Then, the results were compared with the electrical parameters of solar mini-modules employing each type of glass. Additionally, the work aimed to providing a low-cost measuring procedure to determine the influence of front glass on photovoltaic performance in small, laboratory scale preserving the Standard Test Conditions. An important aspect was an analysis of different types of glass texture. To confirm properness and adequacy of the analysis, the uncer- tainty aspect was discussed as well.
Źródło:: Metrology and Measurement Systems; 2018, 25, 1; 203-211
0860-8229
Pojawia się w:: Metrology and Measurement Systems
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Determination of EVA Cross-Linking Degree after Lamination Process by Extraction and Optical Transmission Measuring
Autorzy:: Gawlińska, K.
Drabczyk, K.
Starowicz, Z.
Sobik, P.
Drabczyk, B.
Zięba, P.
Powiązania:: https://bibliotekanauki.pl/articles/352591.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: photovoltaics
silicon solar cells
lamination
gel content test
cross-linking degree
Opis:: The ethylene vinyl acetate (EVA) is widely used for solar modules encapsulation. During lamination process EVA melts and chemical bonds between polymer chains are created. Its number is tightly related to cross-linking degree and it is consider as a major quality reference for module encapsulation. The lamination can be described as a process with two stages: melting and curing where the typical temperature for curing is in the range from 145 to 175°C. In the present study, for the first time, comparison of three commercial available EVA foils with low curing temperature EVA (EVA LOW). For this reason, the temperature of following lamination processes was set from a range from 115 to 175°C. The behavior of cured EVA films under investigation EVA was determined with two approaches: with extraction and with optical methods. The results indicate the applicability of these methods for the EVA cross-linking characterization. Finally, the extraordinary behavior of EVA LOW foil was noticed.
Źródło:: Archives of Metallurgy and Materials; 2018, 63, 2; 833-838
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Diffusive and Displacive Phase Transformations in Nanocomposites under High Pressure Torsion
Autorzy:: Straumal, B.
Kilmametov, A.
Gornakova, A.
Mazilkin, A.
Baretzky, B.
Korneva, A.
Zięba, P.
Powiązania:: https://bibliotekanauki.pl/articles/356575.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: high-pressure torsion
Ti-Fe alloys
phase transitions
high-pressure phases
Opis:: The high-pressure torsion (HPT) of Ti-Fe alloys with different iron content has been studied at 7 GPa, 5 anvil rotations and rotation speed of 1 rpm. The alloys have been annealed before HPT in such a way that they contained different amounts of α/α' and β phases. In turn, the β phase contained different concentration of iron. The 5 anvil rotations correspond to the HPT steady-state and to the dynamic equilibrium between formation and annihilation of microstructure defects. HPT leads to the transformation of initial α/α' and β-phases into mixture of α and high-pressure ω-phase. The α → ω and β → ω phase transformations are martensitic, and certain orientation relationships exist between α and ω as well as β and ω phases. However, the composition of ω-phase is the same in all samples after HPT and does not depend on the composition of β-phase (which is different in different initial samples). Therefore, the martensitic (diffusionless) transformations are combined with a certain HPT-driven mass-transfer. We observed also that the structure and properties of phases (namely, α-Ti and ω-Ti) in the Ti – 2.2 wt. % Fe and Ti – 4 wt. % Fe alloys after HPT are equifinal and do not depend on the structure and properties of initial α'-Ti and β-Ti before HPT.
Źródło:: Archives of Metallurgy and Materials; 2019, 64, 2; 457-465
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: A new locality of the Haemaphysalis concinna tick (Koch, 1844) in Poland and its role as a potential vector of infectious diseases
Autorzy:: Zieba, P.
Nowakiewicz, A.
Michalski, A.
Wlizlo-Skowronek, B.
Gawel, J.
Niemcewicz, M.
Gnat, S.
Lagowski, D.
Powiązania:: https://bibliotekanauki.pl/articles/6675.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Parazytologiczne
Źródło:: Annals of Parasitology; 2019, 65, 3
0043-5163
Pojawia się w:: Annals of Parasitology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Black Silicon Obtained in Two-Step Short Wet Etching as a Texture for Silicon Solar Cells - Surface Microstructure and Optical Properties Studies
Autorzy:: Kulesza-Matlak, G.
Gawlińska, K.
Starowicz, Z.
Sypień, A.
Drabczyk, K.
Drabczyk, B.
Lipiński, M.
Zięba, P.
Powiązania:: https://bibliotekanauki.pl/articles/352242.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: black silicon
low temperature texturization
silicon nanowire
solar cells
multicrystalline silicon
Opis:: In this study a two-step short wet etching was implemented for the black silicon formation. The proposed structure consists of two steps. The first step: wet acidic etched pits-like morphology with a quite new solution of lowering the texturization temperature and second step: wires structure obtained by a metal assisted etching (MAE). The temperature of the process was chosen due to surface development control and surface defects limitation during texturing process. This allowed to maintain better minority carrier lifetime compared to etching in ambient temperature. On the top of the acidic texture the wires were formed with optimized height of 350 nm. The effective reflectance of presented black silicon structure in the wavelength range of 300-1100 nm was equal to 3.65%.
Źródło:: Archives of Metallurgy and Materials; 2018, 63, 2; 1009-1017
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki