Temat: MJ - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Wspomnienie. Profesor Mirosław Jan Mossakowski
Autorzy:: Czernicki, Zbigniew
Jurkiewicz, Jerzy
Wydawca:: Agora
Powiązania:: Gazeta Wyborcza. Edycja lokalna. Warszawa
Gazeta Wyborcza. Edycja lokalna Warszawa
Dostawca treści:: RCIN - Repozytorium Cyfrowe Instytutów Naukowych

Książka

na półce

Skocz do pozycji: 2.

Tytuł:: Kinetics of Nematic to Isotropic Phase Transition in Liquid Crystal Doped with Magnetic Nanoparticles
Autorzy:: Csach, K.
Juríková, A.
Miškuf, J.
Tomašovičová, N.
Gdovinová, V.
Závišová, V.
Kopčanský, P.
Éber, N.
Fodor-Csorba, K.
Vajda, A.
Tematy:: 61.30.-v
64.70.mj
65.80.-g; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1032719.pdf Link otwiera się w nowym oknie
Opis:: A binary mixture of bent-core and rod-shaped liquid crystals was chosen as a model substance combining the properties of both types of liquid crystals. The mixture was doped with a small amount of spherical and rod-like magnetic nanoparticles. Differential scanning calorimetry experiments were performed for the pure as well as for the doped mixture at different heating rates ranging from 1 to 16°C/min. The addition of the magnetic nanoparticles lowered the phase transition temperature. This effect is more intensive in the case of the rod-like magnetic nanoparticles. The kinetics of the nematic to isotropic phase transition was evaluated in the framework of the differential isoconversional method. The calculated apparent activation energy showed non-monotonic behaviour and a sensitivity on the shape of added magnetic nanoparticles.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 3.

Tytuł:: The Effects of Aging on the Hardness and Wear Behaviour of 2124 Al Alloy/B₄C Composites
Autorzy:: Öksüz, K.
Oskay, K.
Tematy:: 81.40.Cd
88.30.mj
81.05.Ni; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1401388.pdf Link otwiera się w nowym oknie
Opis:: The particulate reinforced aluminum alloy matrix composites are being increasingly used for wear component applications. The influence of matrix aging treatment on wear behavior in a powder metallurgy 2124 Al-B₄C composite was investigated. The aging responses of 2124 Al-B₄C metal matrix composite (MMC) and unreinforced matrix alloy are studied and related to variations in wear resistance properties. The MMC is aged resolution treated. Accelerated aging occurs in both MMC conditions, compared with unreinforced alloy. Wear resistance and hardness were substantially higher in the reinforced alloys. The effects of the percentage of boron carbide addition on the microstructure, hardness and wear tests of the produced material are discussed. The effects of the age hardening process are also considered.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 4.

Tytuł:: Structure and Dynamics of Colloidal Suspensions Studied by Means of XPCS
Autorzy:: Patkowski, A.
Gapinski, J.
Fluerasu, A.
Holmqvist, P.
Meier, G.
Lettinga, M.
Nägele, G.
Tematy:: 87.15.Vv
83.10.Mj
82.70.Dd; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1812242.pdf Link otwiera się w nowym oknie
Opis:: Structure and dynamics of suspensions of charged colloidal spheres in water were studied by means of small-angle X-ray scattering and X-ray photon correlation spectroscopy using synchrotron radiation. Experimentally obtained dependences on the scattering vector q of the structure factor S(q), short-time collective diffusion coefficient D(q) and hydrodynamic function H(q) were in good agreement with theoretical predictions. No effect of screening of the hydrodynamic interactions, suggested in the literature, was found. The conditions are discussed at which the maximum of the hydrodynamic function peak value H(q_m) can be obtained experimentally.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 5.

Tytuł:: Studies of Phase Diagram and Glass Transitions of a Liquid Crystal with Ferro- and Antiferroelectric Phases
Autorzy:: Kolek, Ł.
Massalska-Arodź, M.
Majda, D.
Suchodolska, B.
Zalewski, S.
Tematy:: 64.70.kj
64.70.mj
64.70.pp; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1399005.pdf Link otwiera się w nowym oknie
Opis:: Based on the results of the differential scanning calorimetry, of transmitted light intensity measurements and of texture observations the phase diagram of 4-(6-heptafluorobutanoiloxyhexyloxy)biphenyl-4'-carboxylate(S)-4-(methyloheptyloxy-1-carbonyl)-phenyl (4H6) was obtained. The following phases were identified on cooling: isotropic, smectic A, smectic C*, smectic $C_{A}^\ast $ phases and a highly ordered phase called SmX and its glass. During heating transformation from glass of SmX to SmX phase and then transition to a metastable Cr2 phase, evolving to the more stable Cr1 phase, were observed. On further heating $ SmC_{A}^\ast $, SmC* and Sm phases were identified. When Cr2 was cooled, a glass transition was also observed.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 6.

Tytuł:: Effect of Molding Condition on Waviness Profile of GFRP Composites in Compression Molding
Autorzy:: Kim, J.
Kim, H.
Lee, D.
Tematy:: 81.05.Lg
81.05.Qk
88.30.mj; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1399878.pdf Link otwiera się w nowym oknie
Opis:: During compression molding of glass fiber reinforced plastic composites, annealing and quenching experiment is conducted by changing pre-heating and cooling method. As results, major cause of unevenness that affects waviness profile (winding) is the shrinkage of matrix during holding and cooling process. Waviness profile of the surface on molding in glass fiber reinforced plastic composites will be lower when holding pressure load is higher, mold temperature is lower during demolding, and cooling rate is slower. In addition, surface roughness of moldings is depending on holding pressure load compared with mold temperature. According to molding condition of glass fiber reinforced plastic composites, waviness profile of surface can be quantitatively estimated using the proposed equation.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 7.

Tytuł:: Analyzing the Intracavity Frequency Doubling of the Simultaneous Q-Switched Mode-Locked Diode-Pumped Pulsed $Nd^{3+}$ Laser with $Cr^{4+}$:YAG as a Polarized Saturable Absorber
Autorzy:: Abdul Ghani, B.
Hammadi, M.
Tematy:: 42.55.Px
42.55.Rz
42.68.Mj; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1504608.pdf Link otwiera się w nowym oknie
Opis:: The intracavity frequency doubling of a simultaneous passively Q-switched mode-locked diode-pumped $Nd^{3+}$ laser is studied with a polarized isotropic $Cr^{4+}$:YAG saturable absorber. A general recurrence formula for the mode-locked pulses under the Q-switched envelope at a fundamental wavelength has been reconstructed in order to analyze the temporal shape behaviour of a single Q-switched envelope with mode-locking pulse trains. This formula has been derived taking into account the impact of the intracavity frequency doubling and polarized $Cr^{4+}:YAG$ saturable absorber (the Fresnel losses). The presented mathematical model essentially describes the self-induced anisotropy appearing in the polarized $Cr^{4+}:YAG$ in the nonlinear stage of the giant pulse formation. For the anisotropic $Nd^{3+}:YVO_4$ active medium, the generated polarized waves are fixed through the lasing cycle. Second harmonic peak power, pulse width, pulse duration, shift pulse position of central mode and rotational angle as a function of the absorber initial transmission are estimated. The calculated numerical results are in good qualitative and quantitative agreement with the available experimental data reported in references.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 8.

Tytuł:: Neutron Diffraction Study and Deformation Behavior of a Composite Based Mg Alloy Reinforced by Short Saffil Fibers
Autorzy:: Farkas, G.
Máthis, K.
Pilch, J.
Tematy:: 87.64.Bx
88.30.mj
61.72.Hh; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1402148.pdf Link otwiera się w nowym oknie
Opis:: In the present work neutron diffraction has been applied for ex situ investigation of residual stresses in Mg-4%Al-1%Ca (AX41) magnesium alloy reinforced with short Saffil fibers. Samples were deformed in compression at room temperature. Two types of fiber arrangement were investigated. In both samples the fibers were homogeneously distributed and arranged in parallel planes with a random fiber orientation. In the first sample these planes were parallel with the loading axis and in the second one they were perpendicular to the loading direction. Significant dependence of both the mechanical properties and residual strains on the fibers orientation was observed. Sample with parallel fiber arrangement showed higher hardness and lower ductility. Further the increment of residual tensile lattice strain in the matrix with a macroscopic deformation is much higher than in the other case. It was found that the residual strain evolution strongly depends on the orientation of grains in the matrix.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 9.

Tytuł:: Characterization of the Output Pulses of a Simultaneous Q-Switched and Mode-Locked Intracavity Frequency-Doubled Diode-Pumped Pulsed $Nd^{3+}$-Laser
Autorzy:: Abdul Ghani, B.
Hammadi, M.
Tematy:: 42.55.Px
42.55.Rz
42.68.Mj; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1419732.pdf Link otwiera się w nowym oknie
Opis:: A mathematical model for describing the polarization effect of the intracavity frequency-doubling of a simultaneous passively Q-switched and mode-locked diode-pumped $Nd^{3+}$-laser has been demonstrated. The generated polarized waves are assumed to be fixed through the lasing cycle. The maximum absorber initial transmission and the minimum mirror reflectivity values have been determined from the second threshold criterion. The calculated numerical results demonstrate the impact of the variation of the input laser parameters on the characteristics of the output laser pulses. The calculated results are in good agreement with the available experimental data reported in references.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 10.

Tytuł:: Parking in the City
Autorzy:: Šeba, P.
Tematy:: 05.20.-y
02.50.Cw
82.20.Mj; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/2047828.pdf Link otwiera się w nowym oknie
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.
Dostawca treści:: Biblioteka Nauki

Artykuł

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