Wszystkie pola: Sobkowicz, J. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Potential Fluctuations in HgSe:Fe,Ga - a Numerical Study
Autorzy:: Sobkowicz, P.
Wilamowski, Z.
Kossut, J.
Powiązania:: https://bibliotekanauki.pl/articles/1861521.pdf
Data publikacji:: 1993-10
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.55.-i
Opis:: We study spatial correlation of donor charges in HgSe:Fe,Ga using a few simple quantities (mean electrostatic energy of various donor sites, fluctuations of the electrostatic potential). The study uses Monte Carlo simulation techniques. We are able to indicate general trends in the behavior of the correlation when proportion of correlating (Fe^{3+}) and noncorrelating (Ga) charged centers in the sample is changed.
Źródło:: Acta Physica Polonica A; 1993, 84, 4; 645-648
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: InSb/CdTe Heterojuncton: Self-Consistent Calculations of the Energy Structure
Autorzy:: Sobkowicz, P.
Singleton, J.
Greene, S. K.
Powiązania:: https://bibliotekanauki.pl/articles/1891271.pdf
Data publikacji:: 1991-09
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 73.20.Dx
Opis:: Results of self-consistent calculations of the subband energy structure of two-dimensional electron gas in the InSb/CdTe heterojunction are reported. Subband occupations and spin splitting in the absence of magnetic field are presented and compared with results of magneto-transport measurements on high mobility, low carrier density heterojunctions.
Źródło:: Acta Physica Polonica A; 1991, 80, 3; 417-420
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Coulomb versus Madelung Gap: Ordering in a System of Point Charges
Autorzy:: Sobkowicz, P.
Wilamowski, Z.
Kossut, J.
Powiązania:: https://bibliotekanauki.pl/articles/1929618.pdf
Data publikacji:: 1993-09
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.55.-i
72.20.Fr
Opis:: Spatial correlations of impurity charges in a mixed valence regime are studied with the use of Monte Carlo simulations. The influence of various kinds of disorder on the one-particle density of states is determined. A continuous transitions from a "soft" Coulomb gap (density of states vanishing only at the chemical potential) to a "hard" gap (with a finite range of energies with vanishing density of states) is found, driven by decreasing amount of built-in disorder in the system. The "hard" Coulomb gap resembles the Madelung gap, found in crystalline arrangements of charges. The similarity reflects the fact that both the Coulomb and Madelung gaps are manifestations of the same phenomenon, resulting from ordering of the positions of point charges, the only difference being the range of correlations.
Źródło:: Acta Physica Polonica A; 1993, 84, 3; 515-518
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Hazard identification methods
Autorzy:: Orymowska, J.
Sobkowicz, P.
Powiązania:: https://bibliotekanauki.pl/articles/196252.pdf
Data publikacji:: 2017
Wydawca:: Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:: hazards identification
inland shipping
HAZOP
FTA
ETA
FMEA
SWIFT
risk analysis
identyfikacja zagrożenia
Żegluga śródlądowa
ocena ryzyka
Opis:: This article presents the main hazards that occur in the context of inland navigation and their impact on the vessel. First, characteristics are extracted from the following methods with regard to identifying threats: involving steering gear damage to an inland vessel moving on a straight waterway. Next, a hazard identification model is presented, which is appropriate to a situation involving steering gear damage to an inland vessel moving on a straight fairway.
Źródło:: Zeszyty Naukowe. Transport / Politechnika Śląska; 2017, 95; 145-158
0209-3324
2450-1549
Pojawia się w:: Zeszyty Naukowe. Transport / Politechnika Śląska
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Monte Carlo Simulations of Spatial Correlations of Charged Centers in δ-Doped Layers
Autorzy:: Sobkowicz, P.
Wilamowski, Z.
Kossut, J.
Powiązania:: https://bibliotekanauki.pl/articles/1921559.pdf
Data publikacji:: 1992-10
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.55.Eq
73.20.Dx
71.45.Gm
Opis:: Results of Monte Carlo simulations of a 2D system of charged donors are presented. They enable to study the effects related to a spatial correlation of donor charges located on a random donor matrix. A qualitative difference between DX$\text{}^{+}$ and DX¯ models is observed. In the first case, strong temperature dependence of the correlations and a "freezing-like" behaviour is found. The origin of the freezing is traced to the random distribution of donor sites by comparing the system with a liquid-like model where the charges may assume arbitrary positions within a plane. In the second case only nearest-neighbour correlations are observed. The simulations have direct application in analysis of the behaviour of the DX centers in the GaAs planarly doped with Si.
Źródło:: Acta Physica Polonica A; 1992, 82, 4; 645-648
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Navigational safety of inland vessels in the Międzyodrze and Szczeciński Węzeł Wodny area
Autorzy:: Orymowska, J.
Sobkowicz, P.
Powiązania:: https://bibliotekanauki.pl/articles/135244.pdf
Data publikacji:: 2017
Wydawca:: Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:: risk
inland waterway transport
FSA
accidents
potential threats of collision
potential effect of under-bridge passage
Opis:: The most important aspect of the transport of goods by water, including inland waterways, is navigational safety. Formal Safety Assessments (FSAs) are widely-adopted methods of risk analysis used to assess safety. By defining potential risks and describing event scenarios, FSAs allow the estimation and minimization of the level of risk of individual events. The current article presents the characteristics of accidents on inland waterways and the classification of accidents, with a discussion of their effects. After analysis, the research area was narrowly defined to vessels passing under bridges, and the threats arising from barges descending from the axis of the fairway. On the basis of the analysis, the authors have offered a risk assessment model of inland vessel collision with some element of navigational infrastructure during under-bridge passage. Event Tree Analysis (ETA) was used to carry out hazard identification.
Źródło:: Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2017, 49 (121); 93-99
1733-8670
2392-0378
Pojawia się w:: Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:: Biblioteka Nauki

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