Temat: 02.50.-y - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Opinion Formation in an Open System and the Spiral of Silence
Autorzy:: Gawroński, P.
Nawojczyk, M.
Kułakowski, K.
Powiązania:: https://bibliotekanauki.pl/articles/1388390.pdf
Data publikacji:: 2015-03
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 02.50.-y
89.65.-s
05.40.Fb
Opis:: A new model is formulated of the sociological effect of the spiral of silence, introduced by Elisabeth Noelle-Neumann in 1974. The probability that a new opinion is openly expressed decreases with the difference between this new opinion and the perceived opinion of the majority. We also assume that the system is open, i.e. some people enter and some leave during the process of the opinion formation. An influence of a leader is simulated by a comparison of two runs of the simulation, where the leader has different opinion in each run. The difference of the mean expressed opinions in these two runs persists long after the leader's leave.
Źródło:: Acta Physica Polonica A; 2015, 127, 3A; A-45-A-50
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Cyclostationarity and Resampling for Vibroacoustic Signals
Autorzy:: Leśkow, J.
Powiązania:: https://bibliotekanauki.pl/articles/1490325.pdf
Data publikacji:: 2012-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 02.50.-r
05.20.-y
Opis:: Cyclostationarity as a feature of signals was extensively studied in last decades. Publications of Serpedin or Gardner provide an important survey documenting the impact of cyclostationary models on signal analysis in telecommunication, mechanical, acoustic, and econometric signals. The aim of this paper is to introduce the concept of cyclostationarity for mechanical signals and to present the possibilities of various resampling procedures available for such signals. Recent research of Leśkow has shown applicability of bootstrap and subsampling procedures to cyclostationary models. This means, in particular, that the modern statistical mechanical signal analysis can be done without the assumption of Gaussianity and/or without specific linear filtration structure imposed on the signal. In the paper, we show that subsampling procedure proves to be a useful diagnostic tool for testing the cyclic autocorrelation structure for signals generated by vibration.
Źródło:: Acta Physica Polonica A; 2012, 121, 1A; A-160-A-163
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Parking in the City
Autorzy:: Šeba, P.
Powiązania:: https://bibliotekanauki.pl/articles/2047828.pdf
Data publikacji:: 2007-10
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 05.20.-y
02.50.Cw
82.20.Mj
Opis:: We show that the spacing distribution between parked cars can be obtained as a solution of certain linear distributional fixed point equation. The results are compared with the data measured on the streets of Hradec Králové. We also discuss a relation of these results to the random matrix theory.
Źródło:: Acta Physica Polonica A; 2007, 112, 4; 681-690
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Numerical Analysis of Metal-Cylinder-Based Microwave Plasma Module
Autorzy:: Sobański, M.
Jasiński, M.
Mizeraczyk, J.
Powiązania:: https://bibliotekanauki.pl/articles/1366115.pdf
Data publikacji:: 2014-06
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 88.80.hp
84.40.-x
52.35.Hr
84.40.Dc
02.70.Dh
88.30.E-
52.65.-y
52.50.Dg
11.55.-m
52.40.Fd
84.40.Az
Opis:: We present optimization of energy transfer in the waveguide-supplied metal-cylinder-based microwave plasma module with an inner cylindrical quartz tube. The construction of microwave plasma module is based on a WR 340 waveguide standard. Presented microwave plasma module operates at atmospheric pressure and frequency of 2.45 GHz. There is a reduced height section waveguide in microwave plasma module which provides local increase of the electric field in the plasma region. Microwave plasma module is terminated with a movable plunger which plays the role of the tuning element. Tuning characteristics of microwave plasma module are defined as the dependence of the $P_{R}$/$P_{I}$ on the position $l_{s}$ of the movable plunger, where $P_{R}$ and $P_{I}$ are the microwave power reflected and power incident, respectively. The powers $P_{R}$ and $P_{I}$ are measured in the input plane of microwave plasma module. The purpose of the presented optimization is to achieve $P_{R}$ lower than 5% of $P_{I}$ in widest range of position of movable plunger $l_{s}$. We used Comsol Multiphysics software to make numerical analysis which allows to optimize the parameters of microwave plasma module. Results of numerical analysis show that $P_{R}$/$P_{I}$ is lower than 0.05 in a wide range of movable plunger position $l_{s}$.
Źródło:: Acta Physica Polonica A; 2014, 125, 6; 1309-1311
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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