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Wyświetlanie 1-15 z 25
Tytuł:
Zaufanie jako bariera rozwoju przedsiębiorstw handlu elektronicznego
Confidence as a barrier to electronic trade development
Autorzy:
Wasiluk, A.
Suchocki, A.
Powiązania:
https://bibliotekanauki.pl/articles/398951.pdf
Data publikacji:
2012
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
zaufanie
handel elektroniczny
bariera rozwoju
confidence
electronic trade
development barriers
Opis:
Applying the latest technologies to run a business influences not only the creation of new distribution channels for products and services, but also all of the other aspects of business activities. New business environment, new conditions for functioning and competing between companies are created. Simultaneously with new opportunities some barriers appear that companies have to overcome to survive and succeed on the new market. One of most important barriers that hinder electronic trade development is clients' distrust of such kind transactions. This paper includes, apart from theoretical discussion on confidence and trust with special attention given to the area of electronic trade, the presentation of research results regarding the influence of psychological barriers on e-companies' development.
Źródło:
Ekonomia i Zarządzanie; 2012, 4, 1; 113-123
2080-9646
Pojawia się w:
Ekonomia i Zarządzanie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetic Field Influence on Auger Effect on Shallow Donors in CdF$\text{}_{2}$:Mn$\text{}^{2+}$ Luminescence
Autorzy:
Kamińska, A.
Suchocki, A.
Powiązania:
https://bibliotekanauki.pl/articles/1968121.pdf
Data publikacji:
1997-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.20.Hb
73.50.Gr
Opis:
Direct observation of the suppression of the Auger effect on shallow donors by the magnetic field in the luminescence of manganese ions in semiconducting CdF$\text{}_{2}$:Mn crystals is presented. The magnetic field decreases the probability of the Auger effect, which is spin-dependent energy transfer from the manganese ions to the electrons occupying shallow donors. This results in the increase in the decay times of the luminescence.
Źródło:
Acta Physica Polonica A; 1997, 92, 4; 815-818
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Self-Focusing and Optical Bistability in Cd$\text{}_{1-x}$Mn$\text{}_{x}$Te
Autorzy:
Kowalczyk, L.
Suchocki, A.
Gałązka, R. R.
Powiązania:
https://bibliotekanauki.pl/articles/1929620.pdf
Data publikacji:
1993-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.65.Jx
Opis:
Thermally induced self-focusing of laser beam and optical bistability in CdMnTe at room temperature has been investigated. Photothermal focal length as a function of intensity of laser radiation has been measured in Cd$\text{}_{1-x}$Mn$\text{}_{x}$Te for 0.3 ≤ x ≤ 0.6. The time-dependence of the transmitted power for various laser intensities has been investigated and the switching from the transparent to dark state has been observed. For the first time the optical bistable characteristic has been measured in CdMnTe. The results indicate that CdMnTe is a suitable material for cavityless, large contrast, thermally induced absorptive bistable operation in visible region.
Źródło:
Acta Physica Polonica A; 1993, 84, 3; 519-522
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermally Induced Nonlinear Refraction in Cd$\text{}_{1-x}$Mn$\text{}_{x}$Te
Autorzy:
Kowalczyk, L.
Suchocki, A.
Gałązka, R. R.
Powiązania:
https://bibliotekanauki.pl/articles/1923774.pdf
Data publikacji:
1992-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.65.Jx
Opis:
Self-focusing of laser beams is observed in Cd$\text{}_{0.5}$Mn$\text{}_{0.5}$Te at room temperature. The far-field patterns of laser beam after passing through the cadmium manganese telluride crystal are investigated. The values of focal length as well as the absorption coefficient were measured as a function of intensity of laser radiation. From these measurements the values of nonlinear refractive index for Cd$\text{}_{0.5}$Mn$\text{}_{0.5}$Te are determined. The results indicate that the self-focusing observed in Cd$\text{}_{1-x}$Mn$\text{}_{x}$Te is due to a thermally induced change in refractive index.
Źródło:
Acta Physica Polonica A; 1992, 82, 5; 793-796
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Manganese Concentration on Thermoluminescent Properties of $YAlO_{3}:Mn$ Crystals
Autorzy:
Zhydachevskii, Ya.
Suchocki, A.
Berkowski, M.
Warchol, S.
Powiązania:
https://bibliotekanauki.pl/articles/1550510.pdf
Data publikacji:
2010-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.60.Kn
61.80.Ed
61.72.Ji
Opis:
This work is devoted to experimental study of the effect of manganese concentration on thermoluminescent properties of $YAlO_{3}:Mn$ crystals grown by the Czochralski method. A new type of emitting centers beside of $Mn^{4+}$ and $Mn^{2+}$ ions was revealed at low concentration of manganese ions in the crystal. These centers are responsible for the high-temperature thermoluminescent peak at 570 K. A potential of this thermoluminescent peak for thermoluminescence dosimetry application is discussed.
Źródło:
Acta Physica Polonica A; 2010, 117, 1; 177-180
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Use of Bistable Centers in CdF$\text{}_{2}$ for Holographic Recording
Autorzy:
Langer, J. M.
Koziarska-Glinka, B.
Suchocki, A.
Powiązania:
https://bibliotekanauki.pl/articles/1967998.pdf
Data publikacji:
1997-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.40.Lx
78.20.Ci
42.40.Ht
Opis:
It is shown that metastable centers in various semiconductors can be used for efficient hologram recording. This type of holographic materials has a very high dynamic range and sensitivity. Their major drawback for possible applications is low metastability temperature. This problem can be overcome by using CdF$\text{}_{2}$:Ga crystals, which exhibit metastability below 240 K. This material is suitable for writing thick and multiple holograms both in static and dynamic regimes.
Źródło:
Acta Physica Polonica A; 1997, 92, 4; 673-683
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optical Properties of Molecular Beam Epitaxy Grown ZnSe on GaAs
Autorzy:
Karpińska, K.
Suchocki, A.
Godlewski, M.
Hommel, D.
Powiązania:
https://bibliotekanauki.pl/articles/1929648.pdf
Data publikacji:
1993-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
68.55.Bd
68.55.Ln
78.66.Fd
Opis:
Photoluminescence studies of molecular beam epitaxy grown ZnSe-on-GaAs layers are presented. The high sensitivity of the PL technique allowed for identification unintentional dopants in pure ZnSe sample. Characteristic photoluminescence lines due to extended defects were observed. The experimental results obtained show a correlation between intentional doping level and extended defects concentration. We conclude also that even though molecular beam epitaxy layers are grown at low temperature, the self-compensation mechanism may still be important. For heavily doped sample edge emission is deactivated likely due to efficient energy transfer link with deep donor-acceptor pair bands.
Źródło:
Acta Physica Polonica A; 1993, 84, 3; 551-554
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Photostriction of CdF$\text{}_{2}$:In Crystals
Autorzy:
Suchocki, A.
Raułuszkiewicz, J.
Langer, J. M.
Koziarska-Glinka, B.
Powiązania:
https://bibliotekanauki.pl/articles/1968426.pdf
Data publikacji:
1997-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.16.Ch
61.72.Hh
74.62.Dh
Opis:
Lattice relaxation accompanying phototransformation of In bistable centers from the ground, deep state to the shallow state in CdF$\text{}_{2}$ crystal has been measured with the use of scanning tunnelling microscope. It is shown that relatively small macroscopic changes of the crystal length in the order of 1.8×10$\text{}^{-6}$ accompany the phototransformation of In ions. Lattice expansion upon the influence of population of shallow donor levels in CdF$\text{}_{2}$ explains the observed small changes of lattice constant during the process.
Źródło:
Acta Physica Polonica A; 1997, 92, 5; 1005-1008
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Temperature-dependence of cathodoluminescence of zinc oxide monolayers obtained by atomic layer deposition
Autorzy:
Witkowski, B S
Wachnicki, L
Nowakowski, P
Suchocki, A
Godlewski, M
Powiązania:
https://bibliotekanauki.pl/articles/173941.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
zinc oxide
cathodoluminescence
profiling
temperature-dependence
localization
Opis:
We performed cathodoluminescence (CL) investigations of zinc oxide monolayers obtained by atomic layer deposition. Layers of different thickness were deposited on commercial GaN/sapphire templates. Scanning electron microscopy (SEM) system equipped with CL allows direct comparison of SEM images and CL maps, taken from exactly the same areas of samples. In addition to SEM and CL images, CL profiling was performed by collecting the CL spectra at different accelerating voltages. The CL profiling allows to distinguish the emissions from a surface and volume of samples. An inter-link between samples microstructure and emission properties is investigated. Shifts of emission bands, associated by us with the localization effects, are observed. CL investigations are supported by photoluminescence (PL) measurements, which are characterized by a higher spectral resolution. PL investigations allow determination of the origin of emission bands.
Źródło:
Optica Applicata; 2013, 43, 1; 187-194
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Lutetium Co-Doping on the Main Dosimetric Peak of YAP:Mn²⁺ Thermoluminescent Detectors
Autorzy:
Zhydachevskyy, Ya.
Głowacki, M.
Martynyuk, N.
Ubizskii, S.
Berkowski, M.
Suchocki, A.
Powiązania:
https://bibliotekanauki.pl/articles/1030950.pdf
Data publikacji:
2018-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.55.Hx
Opis:
An effect of lutetium co-doping on photoluminescent and thermoluminescent properties of the Mn²⁺-doped (Lu-Y)AP crystals (with Lu content from 0 to 20% with respect to Y) grown by the Czochralski technique has been studied. It was found that the maximum of the thermoluminescent peak at 200°C is shifted towards higher temperatures at Lu content more than 5%. At the same time the position of the second thermoluminescent peak near 350°C remains unchanged. The observed changes in the thermoluminescent peak position are discussed in terms of the point defects of the material.
Źródło:
Acta Physica Polonica A; 2018, 133, 4; 973-976
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electron paramagnetic resonance studies of manganese and cobalt ions in YAlO3 crystals
Autorzy:
Stefaniuk, I.
Rogalska, I
Suchocki, A
Berkowski, M.
Cieniek, B.
Potera, P.
Powiązania:
https://bibliotekanauki.pl/articles/174068.pdf
Data publikacji:
2014
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
electron paramagnetic resonance (EPR)
spin Hamiltonian
Mn2+
Mn4+
Co2+
Fe3+
Cr3+
Nd3+ and Er3+ ions
YAlO3 (YAP) crystals
Opis:
The results of X-band electron paramagnetic resonance measurements of Mn2+ and Mn4+ ions in YAlO3 (YAP) crystals in the temperature range 100–300 K are presented. Additionally, we observe electron paramagnetic resonance spectra of unintentional impurities Fe3+ and Cr3+ in YAP crystals. The angular dependence for Mn ions in YAP crystals can be presented. We aim at obtaining a better insight into the spectroscopic properties of paramagnetic Mn centers and structural information about their nearest environment in YAP host and at determining the valence of manganese ion. In this paper we compare electron paramagnetic resonance spectra for Co and Mn ions in YAP crystals.
Źródło:
Optica Applicata; 2014, 44, 1; 113-121
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Holographic Recording with the Use of Bistable Centers in CdF$\text{}_{2}$
Autorzy:
Koziarska, B.
Langer, J. M.
Ryskin, A. I.
Shcheulin, A. S.
Suchocki, A.
Powiązania:
https://bibliotekanauki.pl/articles/1934064.pdf
Data publikacji:
1995-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.40.Lx
78.50.Ge
78.20.Ci
42.40.Ht
Opis:
We show that bistability and metastability of In and Ga impurities in CdF$\text{}_{2}$ crystals can be efficiently used in writing volume holographic gratings. Phototransformation of these impurities from the localized to the hydrogenic state leads to a large change of the local polarizability of the host, and thus a significant change of the refractive index. While CdF2:In can be used only at low temperatures (below 150 K), CdF2:Ga crystals are suitable for room temperature recording.
Źródło:
Acta Physica Polonica A; 1995, 88, 5; 1010-1012
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Light-Induced Gratings in CdMnTeSe:In Crystals
Autorzy:
Koziarska-Glinka, B.
Ponder, M.
Wojtowicz, T.
Miotkowski, I.
Langer, J. M.
Suchocki, A.
Powiązania:
https://bibliotekanauki.pl/articles/1968302.pdf
Data publikacji:
1997-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
74.62.Dh
42.65.Hw
61.72.Ji
Opis:
We show that DX-like centers in Cd$\text{}_{1-x}$Mn$\text{}_{x}$Te$\text{}_{1-y}$Se$\text{}_{x}$:In crystal can be used in writing volume holographic gratings. The scattering efficiency is higher than 10% which proves the dispersive character of the light-induced gratings. Two different metastable centers with different lattice relaxation were found in the crystal. Measurements of the power dependence of the degenerate four-wave mixing scattering efficiency testify that both of these centers have negative U properties.
Źródło:
Acta Physica Polonica A; 1997, 92, 5; 883-886
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Four- and Two-Wave Mixing in Solids
Autorzy:
Suchocki, A.
Gilliland, G. D.
Quarles, G. J.
Petrovic, M. S.
Powell, R. C.
Powiązania:
https://bibliotekanauki.pl/articles/1888054.pdf
Data publikacji:
1991-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.65.Ma
71.35.+z
Opis:
The paper gives an overview of theory and presents several examples of application of some holographic techniques: four-wave mixing, self-scattering and beam coupling to study nonlinear optical properties of solids. Among them excitation energy transfer in chromium-doped vibronic laser materials and picosecond study of undoped CdTe are reported.
Źródło:
Acta Physica Polonica A; 1991, 80, 2; 207-219
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Exciton Dynamics in CdTe/CdMnTe Multiquantum Well Structures Grown by Molecular Beam. Epitaxy on GaAs Substrate
Autorzy:
Godlewski, M.
Koziarska, B.
Suchocki, A.
Karczewski, G.
Wojtowicz, T.
Kossut, J.
Bergman, J.
Monemar, B.
Powiązania:
https://bibliotekanauki.pl/articles/1934057.pdf
Data publikacji:
1995-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
68.60.-p
78.47.+p
73.20.Fz
71.35.+z
Opis:
The results of picosecond photoluminescence kinetics of four different CdTe/CdMnTe multiquantum well structures grown by MBE on GaAs substrates are presented. The experimental results show that excitons in CdTe quantum wells are strongly localized by potential fluctuations. Photoluminescence decay times of the localized excitons are considerably shorter (about 120 ps) than those reported for free or quasi-free excitons. An influence of Mn in the barriers on exciton properties is demonstrated. For narrow quantum wells as well as for the multiquantum well structure with the highest Mn mole fraction the excitons migrate during their decay to the states with a lower potential energy. Longer decay times are observed for quasi-localized excitons. We show also that for strongly localized excitons the energy transfer between localized and donor bound excitons is less efficient.
Źródło:
Acta Physica Polonica A; 1995, 88, 5; 985-989
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 25

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