Temat: 45.90.+ - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Distribution of Random Pulses Forcing a Damped Oscillator Determined in a Finite Time Interval
Autorzy:: Ozga, A.
Tematy:: 45.05.+x
45.30.+s
45.90.+; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1196915.pdf Link otwiera się w nowym oknie
Opis:: Solving a stochastic problem for systems subjected to random series of pulses is, in the present case, aimed at determining of an approximate distribution of amplitudes of random pulses forcing vibrations of an oscillator with damping. The applied model of investigations indicated the source of difficulties connected with interpretation of the obtained results. Another issue discussed in the paper is how a change of the damping coefficient b of the system may result in a decrease of the difference between the actual distribution of random pulses and that determined from the waveform.
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: The Effect of Pulse Amplitudes on Quality of Determining Distribution of Pulses Forcing Vibration of an Damped Oscillator
Autorzy:: Ozga, A.
Tematy:: 45.05.+x
45.30.+s
45.90.+t; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1402185.pdf Link otwiera się w nowym oknie
Opis:: The paper presents another phase of the study aimed at determining distributions of random pulses forcing vibration of an oscillator with damping. At this stage, the impact of the pulses amplitudes on distributions determined in a finite time interval is discussed. Application of a mathematical model in simulations allows to determine the differences between the distributions generated in MATLAB environment and those determined by a function. The experiment was designed so that the qualitative analysis of the issue was possible.
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Modification of Structure and Properties of Surface Layer of Grey Cast Iron under High Energy Electron Beam
Autorzy:: Alexandrova, N. M.
Mackushev, S. Yu.
Melnikov, V. E.
Tematy:: 62.90.+k
68.45.Nj; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1945255.pdf Link otwiera się w nowym oknie
Opis:: The effect of high energy electron beam irradiation on the crystalline structure and mechanical properties of the surface layer of grey cast iron has been investigated by light and electron microscopy, X-ray analysis as well as microhardness measurements. The electron irradiation leads to the formation of modulated structure of the surface layer, which provides the combination of the high hardness level and the high wear resistance. These properties are caused by the high density of the structural defects in austenite phase, the formation of the high number of dispersed carbides and the existence of a set of phases from ledeburite till sorbite with high level of hardness.
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Nuclear Magnetic Relaxation Dispersion Study of Human Serum Proteins Solutions
Autorzy:: Olszewski, K. J.
Tematy:: 76.90.+d
87.45.-k; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1920946.pdf Link otwiera się w nowym oknie
Opis:: Nuclear magnetic relaxation dispersion profiles in the Larmor frequency range of 0.02-50 MHz and 277 K has been studied for human serum proteins: albumin, γ-globulins and α, β-globulins in aqueous solutions 3-14 per cent by weight of protein. The linear concentration dependences have been found both for the longitudal relaxation rates for water protons and the dispersive and non-dispersive parts of relaxation profiles. The frequency dependent relaxivities have been calculated, the hydrodynamic effect for the albumin macromolecule Brownian rotational correlation time has been observed and analyzed. The importance of molecular weight of protein for the relaxation processes and its influence for magnetic resonance imaging contrast was discussed.
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 5.

Tytuł:: The Importance of Indirect Interactions Between Adatoms for Temperature Dependent Processes on Metal Surface
Autorzy:: Rogowska, J. M.
Kołaczkiewicz, J.
Tematy:: 82.65.Nz
61.45.+s
68.90.+g; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1892262.pdf Link otwiera się w nowym oknie
Opis:: The asymptotic form of the indirect pseudopotential interaction of noble metal adatoms on jellium is used to interpret the phenomena arising during thermal treatment of the noble metal submonolayers on W(110). It is shown that the 2D condensation is an activated process. The growth of open clusters needs lower activation energy than the close-packed island formation. Therefore the open clusters should predominate at low temperatures and low coverages, as it is observed experimentally. On the basis of calculation of the total energy of submonolayers as a function of coverage Θ the experimental measurement of desorption energy vs. coverage is discussed.
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 6.

Tytuł:: Magnetic Properties of Spin-Ladders (A$\text{}_{2}$Cu$\text{}_{2}$O$\text{}_{3}$)$\text{}_{m}$ (CuO$\text{}_{2}$)$\text{}_{n}$
Autorzy:: Baran, M.
Szymczak, H.
Szymczak, R.
Dyeyev, S.
Leonyuk, L.
Babonas, G.-J.
Tematy:: 75.40.Cx
75.30.Gw
75.45.+j
75.90.+w; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/2013220.pdf Link otwiera się w nowym oknie
Opis:: Magnetization M(T) and M(H) data of single crystals of the S=1/2 quasi-one-dimensional system (A$\text{}_{2}$Cu$\text{}_{2}$O$\text{}_{3}$)$\text{}_{m}$(CuO$\text{}_{2}$)$\text{}_{n}$ with various A-site constituents are compared. The studied orthorhombic, incommensurate crystals are characterized by m/n=5/7,7/10, and 9/13. The role of rare-earth ions located in A-sites is discussed.
Dostawca treści:: Biblioteka Nauki

Artykuł

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