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Wyświetlanie 1-15 z 209
Tytuł:
Serret-Frenet Formulae for Null Quaternionic Curves in Semi Euclidean 4-Space ℝ⁴₁
Autorzy:
Tuna Aksoy, A.
Çöken, A.
Powiązania:
https://bibliotekanauki.pl/articles/1402354.pdf
Data publikacji:
2015-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
02.40.-k
02.40.Hw
Opis:
In this study, we construct the Cartan frame of a null quaternionic curves in semi Euclidean spaces R⁴₁ for an arbitrary parameter.
Źródło:
Acta Physica Polonica A; 2015, 128, 2B; B-293-B-296
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamic Tsallis Entropy for Simple Model Systems
Autorzy:
Khusnutdinov, N. R.
Yulmetyev, R. M.
Emelyanova, N. A.
Powiązania:
https://bibliotekanauki.pl/articles/2044641.pdf
Data publikacji:
2006-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
65.40.Gr
Opis:
In this paper we consider the dynamic Tsallis entropy and employ it for four model systems: (i) the motion of Brownian oscillator, (ii) the motion of Brownian oscillator with noise, (iii) the fluctuation of particle density in hydrodynamics limit as well as in (iv) ideal gas. We show that the small value of parameter non-extensivity 0 < q < 1 acts as a non-linear magnifier for small values of the entropy. The frequency spectra become more sharp and it is possible to extract useful information in the case of noise. We show that the ideal gas remains non-Markovian for arbitrary values of q.
Źródło:
Acta Physica Polonica A; 2006, 109, 2; 199-217
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
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
Artykuł
Tytuł:
Chemisorption Isotherms for Ising Anderson Hamiltonian
Autorzy:
Taranko, E.
Cardenas, R.
Taranko, R.
Fedyanin, V. K.
Powiązania:
https://bibliotekanauki.pl/articles/1931807.pdf
Data publikacji:
1994-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
68.45.-v
82.65.My
Opis:
The adsorption isotherms for Ising-Anderson type model Hamiltonian describing the chemisorbed system was calculated. The submonolayer coverage of the substrate surface was considered on the equal footing together with the electronic characteristics of the chemisorbed adatoms in a self-consisting manner. The resulting adsorption isotherms depend in explicit way on the electronic parameters describing the chemisorbed adatoms and substrate metal.
Źródło:
Acta Physica Polonica A; 1994, 86, 6; 917-927
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Differential Equation for Asymmetric Voigt Profile
Autorzy:
Ciuryło, R.
Domysławska, J.
Trawiński, R. S.
Powiązania:
https://bibliotekanauki.pl/articles/1929159.pdf
Data publikacji:
1993-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
32.70.Jz
33.70.Jg
34.20.Cf
Opis:
The second-order differential equation for the asymmetric Voigt profile is presented, leading to a powerful and accurate method of determining the line shape parameters.
Źródło:
Acta Physica Polonica A; 1993, 83, 4; 425-430
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Parametric Equations for the Energy Gap. Extended BCS Case
Autorzy:
Gonczarek, R.
Mulak, M.
Powiązania:
https://bibliotekanauki.pl/articles/1931831.pdf
Data publikacji:
1994-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
74.20.-z
Opis:
The generalised form of the gap equation which comprises also some non-BCS approaches is defined and solved. The parametric gap equations have been derived in a few equivalent cases and discussed in$\text{}_{}$dissimilar limits. It is shown that the relations between the critical temperature and zero-temperature energy gap can be extended for all systems under consideration. The main benefits and incontestable advantage of the presented method are demonstrated with regard to the general BCS case.
Źródło:
Acta Physica Polonica A; 1994, 86, 6; 1007-1014
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Design Aspects for Ultra Low-Power, Low-Noise 90 nm CMOS Charge Sensitive Amplifier for the Active Pixel Detector
Autorzy:
Barzdenas, V.
Navickas, R.
Powiązania:
https://bibliotekanauki.pl/articles/1807954.pdf
Data publikacji:
2009-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
84.37.+q
07.77.Ka
Opis:
A falling particle in the digital registration systems for elementary particles active pixel detector induces electric charge, the value of which describes the parameters of the particle in the detector. Since the electric charge induced by a single particle is relatively weak, the detector signal is first processed (amplified and shaped) right in the zone of irradiation and only then transmitted further. This paper analyses the primary analogical registration electronics for digital registration systems for elementary particles active pixel detectors, which is charge sensitive amplifiers operating in the nanoampere region.
Źródło:
Acta Physica Polonica A; 2009, 115, 6; 1139-1140
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the Exact Calculation of the Scattering Lengths for Long Range Potentials. II. Lenz Potentials
Autorzy:
Szmytkowski, R.
Powiązania:
https://bibliotekanauki.pl/articles/1887462.pdf
Data publikacji:
1991-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
03.80.+r
34.10.+x
Opis:
The potentials vanishing asymptotically as Lenz potentials are considered and an exact method of calculating of the scattering lengths for them is presented. This method is especially useful for Buckingham polarization potential. Formulae obtained in this report are the generalization of those derived in the previous paper for the inverse power potentials.
Źródło:
Acta Physica Polonica A; 1991, 79, 5; 613-618
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Micro-optical and Optoelectronic Components for Optical Interconnection Applications
Autorzy:
Taghizadeh, M. R.
Waddie, A. J.
Powiązania:
https://bibliotekanauki.pl/articles/2030320.pdf
Data publikacji:
2002-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.79.Ta
Opis:
The advances in the design and fabrication of microlaser arrays, photodetectors, and free-space optical interconnection elements have driven the creation of ever more "real world" demonstrator systems. In this paper we review the progress made to date on two separate demonstrator projects which have been assembled at Heriot-Watt University. We shall describe some of the enabling technologies used in the creation of these systems and outline the potential for scaling the architectures described up to sizes where the computational advantages of the optics-in-computing paradigm become highly attractive.
Źródło:
Acta Physica Polonica A; 2002, 101, 1; 175-187
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Braids for Pretzel Knots
Autorzy:
Suffczyński, M.
Powiązania:
https://bibliotekanauki.pl/articles/2014522.pdf
Data publikacji:
2000-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
87.10.+e
36.20.-r
87.15.-v
02.40.-k
Opis:
The words of braid closures for the pretzel knots, in particular the twist knots relevant to molecular supercoils in biochemistry, are recorded in a standardized form, which enables one to see the regular pattern of the words, and thus to write the braid words representing pretzel knots for general values of the crossing number.
Źródło:
Acta Physica Polonica A; 2000, 98, 6; 663-671
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetovision Scanning System for Detection of Dangerous Objects
Autorzy:
Nowicki, M.
Szewczyk, R.
Powiązania:
https://bibliotekanauki.pl/articles/1202312.pdf
Data publikacji:
2014-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.70.-q
85.75.Ss
Opis:
This paper presents an application of magnetovision based measurements to develop a method for passive detection of dangerous ferromagnetic objects. Scanning system was designed and built to study the magnetic field vector distributions. The measurements of the Earth's field disturbances caused by ferromagnetic objects were carried out. The ability for passive detection of selected dangerous objects was demonstrated. Further data processing allowed for determining the (x,y) coordinates of the object relative to the plane of measurement, and even the possibility of calculating the distance from the object. The results obtained indicate that it is possible to detect and determine the location of dangerous ferromagnetic objects. This opens the new way to use magnetovision in public security systems, in particular for the detection of dangerous objects by police and sapper robots.
Źródło:
Acta Physica Polonica A; 2014, 126, 1; 382-383
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of an Alternative Fuel for Diesel Engines
Autorzy:
Keven, A.
Karaali, R.
Powiązania:
https://bibliotekanauki.pl/articles/1402019.pdf
Data publikacji:
2015-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
88.20.tf
88.05.-b
Opis:
Internal combustion engines use generally fossil fuel products. World resources of it is limited. Renewable alternative energy sources are getting important solution for energy demand. Hazelnut oil ethyl ester is obtained from raw hazelnut and mixed with diesel oil in certain proportions to use in a four-stroke direct injected single cylinder diesel engine. In this study the effects of the mixture of diesel oil with hazelnut oil ethyl ester on the engine performance and exhaust gas emissions are investigated for the first time in literature. The fuel injection system is regulated to use the mixture in the engine for the investigation. The results show that, the mixture with 25% ethyl ester extracted from hazelnut oil can be used as an alternative fuel without any change or regulation of the diesel engine.
Źródło:
Acta Physica Polonica A; 2015, 128, 2B; B-282-B-285
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simple Quantitative Analysis of Spatio-Temporal Diagrams for Domain Wall Dynamics
Autorzy:
Kosiński, R. A.
Stępień, R.
Powiązania:
https://bibliotekanauki.pl/articles/1932111.pdf
Data publikacji:
1995-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
05.45.+b
75.10.Hk
75.60.Ch
Opis:
A quantitative analysis of spatio-temporal diagrams, which describe the dynamics of a chosen, spatially extended dynamic system (a domain wall in a thin magnetic garnet film) is presented. Two quantifiers characterizing such diagrams - a correlation function and power spectrum density function - were calculated using solutions of equations of motion. It was found that introducing these quantifiers to the analysis of spatio-temporal diagrams enables one to effectively characterize the type and the properties of motion of the considered system.
Źródło:
Acta Physica Polonica A; 1995, 87, 3; 575-583
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
High Resolution Eddy Current Tomography System for Nondestructive Testing
Autorzy:
Salach, J.
Szewczyk, R.
Powiązania:
https://bibliotekanauki.pl/articles/1202343.pdf
Data publikacji:
2014-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.70.Ex
81.70.Tx
Opis:
Idea of the high-resolution eddy current tomography is presented. Proposed system gives possibility of testing cylinder-shaped elements made of both magnetic and non-magnetic materials. To validate the concept, the tomographic measurements are carried out on set of steel cylinders with non-magnetic copper inclusion. Measurements were done during both linear and rotational movement of the element. Achieved results indicate the high sensitivity of system, which creates possibility of its application for non-destructive testing of the elements made of ferromagnetic and non-magnetic materials.
Źródło:
Acta Physica Polonica A; 2014, 126, 1; 402-403
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Superconducting Cavity Utilization for Linear Accelerator Systems
Autorzy:
Yildiz, H.
Cakir, R.
Porsuk, D.
Powiązania:
https://bibliotekanauki.pl/articles/1401998.pdf
Data publikacji:
2015-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
29.20.Ej
42.60.By
Opis:
Self amplified stimulated emission free electron laser production from electron energy above 1.5 GeV is studied to obtain 1-100 nm laser wavelength. Design simulations of linear accelerating system with gun and enjector system has been done in more detail by considering space charge effect for electron beam. Electromagnetic field for superconducting cavities, solenoid fields, cavity defects such as Higher Order Modes, Multipacting, Lorentz Force Detuning, and beam behaviour along the beamline are very important details for this study. Optimised cavity cell design layout are provided in order to obtain quality factor $10^9$ for designed cavities throughout the main linear acceleration. To determine coupling factor, and zero modes and also other modes with relative errors are searched.
Źródło:
Acta Physica Polonica A; 2015, 128, 2B; B-246-B-247
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 209

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