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    Tytuł:
    User services of tactical communications in the digital age
    Autorzy:
    Erkan, E. Ç.
    Uzun, Ş.
    Powiązania:
    https://bibliotekanauki.pl/articles/308312.pdf
    Data publikacji:
    2004
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    tactical communications
    IP
    X.25
    C4I systems
    Opis:
    Increasing demands on an extensive amount of digital data and information flows for C4I is forcing the modern armies to freeze and omit EUROCOM based tactical area communications system and to develop new concepts based on the adoption of modern communication systems such as ISDN, ATM described in the TACOMS Post 2000 Final Report II in NATO. ASELSAN, as a leading company in the military electronics arena, is following and participating all the activities of TACOMS Post 2000 together with Turkish Ministry of Defense. Turkey's tactical area communications system TASMUS is a mature and fielded system, which will satisfy future communication needs of the 21st century C4I systems. In this paper, we describe the basic features and user services of TASMUS. With the support of simultaneous voice and data capabilities, TASMUS aims to form mobile, survivable, flexible and secure network to support all the present and future communication requirements of the tactical commanders. Using the near real time data communications feature, TASMUS is also significant for the network-centric warfare applications such as tactical sensor and weapon systems, besides the communication needs of the Turkish Army.
    Źródło:
    Journal of Telecommunications and Information Technology; 2004, 4; 39-44
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zalety systemu zasilania trakcji 2x25kV++
    Demonstration of 2x25kV++ benefit
    Autorzy:
    Perret, Jean Paul
    Friaud, Marc
    Przeniosło, Grzegorz
    Powiązania:
    https://bibliotekanauki.pl/articles/249857.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Naukowo-Wydawniczy TTS
    Tematy:
    elektroenergetyka
    2x25kV
    Sieć trakcyjna
    innowacja.
    Energy
    Catenary
    innovation
    Opis:
    System 2x25kV++ jest zmodernizowanym układem zasilania górnej sieci trakcyjnej 2x25kV pozwalającym na obniżenie impedancji sieci. To nowatorskie rozwiązanie pozwala na polepszenie jakości zasilania trakcji w wyniku optymalizacji architektury systemu zasilania.
    2x25kV++ system is an upgrade of 2x25kV catenary arrangement that allows a substantial decrease of the catenary impedance. This innovating solution for railway power supply leads to an increase of power quality resulting optimisation of power supply architecture.
    Źródło:
    TTS Technika Transportu Szynowego; 2020, 1-2; 66-69
    1232-3829
    2543-5728
    Pojawia się w:
    TTS Technika Transportu Szynowego
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On the Nonlinear Effects of Magnetoacoustic Perturbations in Optically Thin Quasi-Isentropic Plasmas
    Autorzy:
    Perelomova, A.
    Ratkowski, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/1030551.pdf
    Data publikacji:
    2018-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    43.25.-x
    43.25.Nm
    Opis:
    Nonlinear effects of planar magnetosound perturbations in a plasma are discussed. Plasma is non-adiabatic due to optically thin radiation and external heating. For these reasons, thermal instability of a plasma may appear which makes it acoustically active. The plasma is assumed to be initially homogeneous ideal gas with infinite electrical conductivity permeated by a straight magnetic field which is orthogonal to the trajectories of gas particles. The instantaneous dynamic equations which describe nonlinear effects of intense sound in quasi-isentropic plasma, are derived. Nonlinear interaction of periodic and aperiodic magnetoacoustic perturbations with the non-wave modes, are discussed. The conclusions concern dissipative or active behavior of magnetoacoustic perturbations which is determined by the kind of the heating-cooling function.
    Źródło:
    Acta Physica Polonica A; 2018, 133, 1; 194-200
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Non-Wave Variations in Temperature Caused by Sound in a Chemically Reacting Gas
    Autorzy:
    Perelomova, A.
    Pelc-Garska, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/1493610.pdf
    Data publikacji:
    2011-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    43.25.-x
    43.20.Bi
    Opis:
    A weakly nonlinear generation of non-acoustic modes in the field of sound in a gas is considered. An exoteric chemical reaction of A → B type, which takes place in a gas, may be reversible or not. Two types of sound are considered, low-frequency and high-frequency as compared with the characteristic time of a chemical reaction. For both these cases, the governing equations of non-acoustic modes are derived and conclusions of the efficiency of their nonlinear generation by sound are made. The character of nonlinear generation of non-acoustic modes by sound depends essentially on reversibility of a chemical reaction.
    Źródło:
    Acta Physica Polonica A; 2011, 120, 3; 455-461
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Theoretical Photoneutron Cross Sections and the Effect of Gamma Strength Functions for W, Ag, Nb
    Autorzy:
    Karpuz Demir, N.
    Çetin, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031930.pdf
    Data publikacji:
    2017-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    24.10.-i
    25.20.-x
    Opis:
    In nuclear reactions the usage of high energy gamma particles, as projectiles, has some essential advantages for studying of nuclear structure and reaction mechanisms. In this work, (γ,n) reaction cross sections of ¹⁸⁶W, ¹⁰⁷Ag and ⁹³Nb have been calculated with TALYS 1.6 nuclear reaction simulation code. The main aim of this study is to investigate the effects of preequilibrium and the gamma strength functions on ¹⁸⁶W, ¹⁰⁷Ag and ⁹³Nb. The calculated results have been discussed and compared with the experimental data.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 3; 1076-1079
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Variation of Photoneutron Cross Section with Mass Number
    Autorzy:
    Karpuz, N.
    Boz, M.
    Mavi, B.
    Akkurt, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402482.pdf
    Data publikacji:
    2015-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    25.20.-x
    13.85.Lg
    Opis:
    Photonuclear reactions play an important role in many different subfields of nuclear astrophysics, and fields, such as nucleosynthesis applications. The photonuclear reaction cross sections, especially the photoneutron reaction cross sections, are the fundamental properties of nuclear systems. In this study, theoretical evaluation of photoneutron reaction cross sections for 27 ≤ A ≤ 238 targets ($\text{}^{27}Al,$ $\text{}^{96}Mo,$ $\text{}^{181}Ta,$ $\text{}^{238}U$) have been investigated in the incident photon energy range of 7-35 MeV. Monte Carlo code TALYS 1.6 was used to calculate the photoneutron cross sections. The results are compared with the earlier experimental reports in literature and the cross section data in the TENDL-2013 nuclear reaction data library, based on subsequent versions of the TALYS nuclear code system. The photoneutron cross section results and the effects of the mass number of target nuclei are discussed.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 2B; B-409-B-410
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Calculation of Gamma Strength Functions for Photonucleon Reactions
    Autorzy:
    Karpuz, N.
    Mavi, B.
    Akkurt, İ.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402486.pdf
    Data publikacji:
    2015-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    24.10.-i
    25.20.-x
    Opis:
    The cross section for (γ,N) reaction is important for investigation of nuclear structure, especially in low-energy giant dipole resonance (GDR). The total cross sections of $\text{}^{12}C(γ,n)^{11}C$ and $\text{}^{12}C(γ,p)^{11}B$ reactions, calculated using TALYS 1.2 nuclear code, are 15.5 to 40 MeV and 15 to 110 MeV, respectively. In the calculations, the default pre-equilibrium models and Brink-Axel Lorentzian model in all of the gamma strength functions have been used. The effects of the gamma strength function on the cross section exchange data has determined the most compatible model type. The results are compared with the experimental data from the EXFOR database and the evaluated nuclear data from TENDL-2012. Our calculated results are in good agreement with the previously reported experimental results.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 2B; B-414-B-416
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Photoactivation Analysis of Mineral Trioxide Aggregate: Preliminary Results
    Autorzy:
    Eke, C.
    Er, K.
    Segebade, C.
    Boztosun, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031466.pdf
    Data publikacji:
    2017-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    25.20.-x
    29.20.Ej
    Opis:
    The purpose of this study is to qualitatively analyse the elemental components of a mineral trioxide aggregate material using photoactivation. The material was irradiated for two hours using bremsstrahlung photons with an end-point energy of 18 MeV from a clinical electron linear accelerator. After irradiation the gamma-ray emission of the sample was counted by gamma spectrometry using a high-purity germanium (HPGe) detector. The gamma-ray spectra were analyzed by computer software. Major and trace elements were detected.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 3; 869-871
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cross Sections Calculation of (γ,N) Reactions for Some Elements
    Autorzy:
    Karpuz, N.
    Boz, M.
    Mavi, B.
    Akkurt, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402484.pdf
    Data publikacji:
    2015-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    24.10.-i
    25.20.-x
    Opis:
    Photonuclear processes can play an important role in the detection of nuclear materials. For this purpose, in this study, the (γ,n) and (γ,p) cross sections as functions of photon energy in medium weight nuclei were calculated. Calculations have been made of the cross sections for some of the (γ,n) and (γ,p) reactions in $\text{}^{28}Si,$ $\text{}^{32}S,$ $\text{}^{56}Fe$ and $\text{}^{63}Cu$ nuclei using the TALYS 1.6 nuclear code with incident photons of 7-40 MeV. These calculated cross sections are compared with each other and with the earlier experimental results from the literature (EXFOR). Calculated results ($\text{}^{56}Fe(γ,n),$ $\text{}^{63}Cu(γ,n),$ $\text{}^{56}Fe(γ,p)$ and $\text{}^{63}Cu(γ,p)$ cross sections) are in very good agreement with the experimental data. However, because of the Coulomb barrier, the photoproton cross sections for $\text{}^{32}S,$ $\text{}^{56}Fe$ and $\text{}^{63}Cu$ target nuclei, are smaller than the photoneutron cross sections.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 2B; B-411-B-413
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Phase-Locked Particle Image Velocimetry Visualization of the Sound Field at the Outlet of a Circular Tube
    Autorzy:
    Weyna, S.
    Mickiewicz, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/1196700.pdf
    Data publikacji:
    2014-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    43.58.+z
    43.28.Js
    43.25.-x
    47.35.Rs
    Opis:
    The shedding process and acoustic flow formation in the region of outlet of a cylinder duct has been investigated by means of the particle image velocimetry (PIV) technique. The research work on the behavior of the sound field at outlets of waveguides addresses issues of importance to industrial applications. The obtained results can be used in a number of industrial applications involving pipes, ducts and tubing. In our investigation the acoustics flow fields are measured with a phase-locked PIV system with high sampling rate and large internal memory block using DAVIS v. 8.11 software. A cross-correlation method, in conjunction with the FFT analysis, is used as a vector processing algorithm. A series of PIV vector maps was used to evaluate the acoustic velocity field at the open end of circular tube throughout the acoustic cycle for frequencies of 700 Hz and 1400 Hz. Six phase steps were assumed for one frequency cycle and the characteristic signal was extracted from the velocity data step and shown graphically.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 4A; A-108-A-112
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Strong Acoustic Anisotropy on Reflection of Bulk Acoustic Waves in Crystals
    Autorzy:
    Polikarpova, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1811547.pdf
    Data publikacji:
    2008-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    43.35.Sx
    78.20.Hp
    43.25.-x
    61.72.-y
    Opis:
    Propagation and reflection of plane elastic waves in the acousto-optic crystals tellurium dioxide and calomel as well as in the ferroelectric material barium titanate is examined in the paper. The reflection of the waves from a free and flat boundary separating the crystal and the vacuum is investigated in the (001) planes of $TeO_2$, $Hg_2Cl_2$, and $BaTiO_3$ in the case of glancing acoustic incidence on the boundary. The analysis shows that as much as two elastic waves may be reflected from the crystal surface. Energy flow of one of the reflected waves in paratellurite and calomel propagates in a quasi-back direction with respect to the incident energy flow, so that both energy flows are separated by an angle as narrow as a few degrees. It is found that a relative intensity of the unusually reflected wave in the acousto-optic crystals may be close to a unit in a wide variety of crystal cuts. Possible applications of the examined phenomena in acousto-optic devices are discussed in the presentation.
    Źródło:
    Acta Physica Polonica A; 2008, 114, 6A; A-175-A-182
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analiza czasu i wydajności spawania stali superdupleks
    Time and efficiency analysis of superduplex steel welding
    Autorzy:
    Chudziński, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/95404.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydawnictwo PB
    Tematy:
    stal dupleks
    stal superdupleks
    SAF 2507
    X2CrNiMoN25-7-4 (14410)
    czas spawania
    wydajność spawania
    duplex steel
    superduplex steel
    X2CrNiMoN25-7-4(14410)
    welding time
    welding efficiency
    Opis:
    Praca zawiera charakterystykę stali dupleks oraz ilościowe statystyki i prognozy jej zastosowania. Przedstawiono także teorię w zakresie obliczania czasu głównego i czasu całkowitego spawania na podstawie objętości wykonywanej spoiny oraz współczynnika czasu jarzenia się łuku i wydajności stapiania. W części badawczej wykonano analizę porównawczą czasu i wydajności spawania w pozycji PF złącza blach o grubości 8 mm ze stali superdupleks X2CrNiMoN25-7-4 (1.4410), spawanego różnymi metodami. Analiza czasów oraz wydajności spawania pozwoliła ustalić różnice w tym zakresie między możliwymi do zastosowania metodami spawania i potwierdzić kilkukrotnie wyższą wydajność metody 136 (FCAW) niż pozostałych badanych: 111 (SMAW) i 141 (GTAW).
    This paper contains the characteristics of duplex steel and the quantitative statistics and forecasts for its use. There is presented theory of calculating main welding time and total welding time based on the volume of the weld, time factor of the arc's glow and melt efficiency. The comparative analysis of the welding time and efficiency in the PF position of the 8mm sheet metal joint of X2CrNiMoN25-7-4 (1.4410) superduplex stainless steel welded by various processes was performed. Analysis of welding times and weld efficiency has allowed us to determine the differences between the applicable welding processes and to confirm several times higher efficiency of the 136 process (FCAW) from the other examined: 111 (SMAW) and 141 (GTAW).
    Źródło:
    Postępy w Inżynierii Mechanicznej; 2017, 10(5); 5-14
    2300-3383
    Pojawia się w:
    Postępy w Inżynierii Mechanicznej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Chemistry on the Energy Band Structure: AlAs Versus GaAs
    Autorzy:
    Bogusławski, P.
    Gorczyca, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1891295.pdf
    Data publikacji:
    1991-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.25.Tn
    71.10.+x
    Opis:
    Energy band structure of AlAs and GaAs is analyzed in terms of the energy structure of the constituent atoms. Conduction band wave functions are projected on s-, p-, and d-symmetry atomic orbitals. The resulting information is combined with the eigenenergies of Al and Ga atoms, in order to-discuss the character of the band gaps, and the sign of deformation potentials.
    Źródło:
    Acta Physica Polonica A; 1991, 80, 3; 433-436
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Transmission of the Electron Analyzers Determined by Elastic Peak Electron Spectroscopy
    Autorzy:
    Gruzza, B.
    Bondot, P.
    Porte, A.
    Jardin, C.
    Gergely, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1892398.pdf
    Data publikacji:
    1992-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    07.80.+x
    25.30.Bf
    68.35.-p
    Opis:
    Using the elastic peak electron spectroscopy (EPES), the transmission functions were determined for the 4-grid retarding field and the hemispherical analyzers, which are commonly used for surface physics experiments.
    Źródło:
    Acta Physica Polonica A; 1992, 81, 1; 159-164
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characterization of a Schottky Diode Rectenna for Millimeter Wave Power Beaming Using High Power Radiation Sources
    Autorzy:
    Etinger, A.
    Pilossof, M.
    Litvak, B.
    Hardon, D.
    Einat, M.
    Kapilevich, B.
    Pinhasi, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/1032884.pdf
    Data publikacji:
    2017-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    84.40.-x
    88.80.hp
    88.80.ht
    42.25.Bs
    Opis:
    Two principal elements play a role in a wireless power beaming system: a high power radiation source as the transmitter and a rectifying antenna (rectenna) as an RF to DC converter at the receiving site. A millimeter wave power transmission is analyzed using transmission system and a W-band rectenna based on a low-barrier Schottky diode. A quasi-optical approach is presented here, using free-space Gaussian propagation and optical ABCD matrices for lenses. Experiments are made to estimate the optimal load resistance and power handling capability of a single rectifier. A low power W-band tunable solid-state source delivering 0.4 W CW power equipped by the focusing lenses is used to characterize the responsivity of the rectenna. A pulsed power gyrotron is used to identify the diode breakdown point. It was found that the RF-to-DC conversion efficiency corresponding to the optimal load of 200 Ω is about 20.5% while the maximum DC power converted by the diode with optimal load is about 15 mW before breakdown.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 5; 1280-1284
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of material non-homogeneity and two parameter elastic foundation on fundamental frequency parameters of Timoshenko beams
    Autorzy:
    Avcar, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1070359.pdf
    Data publikacji:
    2016-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.43.Bn
    62.20.-x
    62.25.Jk
    89.20.Kk
    Opis:
    In the present study, effects of material non-homogeneity and two-parameter elastic foundation on the fundamental frequency parameters of the simply supported beams are examined. Material non-homogeneity is characterized taking into account the parabolic variations of Young's modulus and density along the thickness direction of the beam while the value of Poisson's ratio is assumed to remain constant. The foundation medium is assumed to be linear, homogeneous and isotropic, and it is modeled by the Pasternak model with two parameters for describing the reaction of the elastic foundation on the beam. At first, the equation of the motion including the effects of the material non-homogeneity and two-parameter elastic foundation is provided. Then, the solutions including fundamental frequency parameters versus various non-homogeneity, density and foundation parameters, and length to depth ratio adopting the Timoshenko beam theory as well as the Euler-Bernoulli beam theory are presented. To show the accuracy of the present results, a comparison is carried out and a good agreement is found.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 1; 375-378
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design, Modeling and Simulation of MEMS Devices on Si, SiC, and Diamond for Harsh Environment Applications
    Autorzy:
    Kociubiński, A.
    Bieniek, T.
    Janczyk, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1199152.pdf
    Data publikacji:
    2014-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    07.05.Tp
    07.07.Df
    62.20.-x
    62.25.Fg
    Opis:
    Set of micromechanical (MEMS) test structures designed for fabrication on silicon, silicon carbide and diamond substrates has been successfully designed. A dedicated mask-set development has been carried along with numerical simulations performed with assistance of a dedicated design and modelling CoventorWare™ - toolset by Coventor. A set of sample simulations presented in this paper has been performed for specific simulation domains focused on silicon-alternative material reality to proof the usefulness of proposed substrates. The aim was to verify its applicability for MEMS design and confirm an outstanding performance of the resulting device which effectively opens a new area of interest for subsequent research and development efforts.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 6; 1374-1376
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental Investigation of Few-Nucleon Dynamics at Medium Energies
    Autorzy:
    Khatri, G.
    Bodek, K.
    Ciepał, I.
    Kalantar-Nayestanaki, N.
    Kistryn, St.
    Kłos, B.
    Kozela, A.
    Magiera, A.
    Mazumdar, I.
    Messchendorp, J.
    Parol, W.
    Rozpędzik, D.
    Skwira-Chalot, I.
    Stephan, E.
    Wrońska, A.
    Zejma, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402633.pdf
    Data publikacji:
    2015-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    21.30.-x
    24.70.+s
    25.10,+s
    13.75.Cs
    Opis:
    An experiment, with unpolarized deuteron beam of 160 MeV impinging on liquid hydrogen and liquid deuterium targets, was carried out using BINA detector at KVI, in Groningen, the Netherlands. Data were collected for the purpose of obtaining high precision differential cross-section for the deuteron break-up reaction. The elastic scattering data were also collected alongside. We present here the methods applied in analysis of data collected in the backward part of the detector.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 5; 1529-1530
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimization of Magnetic and Structural Properties of Sr Ferrite Prepared by Low-Temperature Combustion
    Autorzy:
    Grusková, A.
    Jančárik, V.
    Sláma, J.
    Ušáková, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1813884.pdf
    Data publikacji:
    2008-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.-y
    75.50.Ww
    74.25.Ha
    33.45.+x
    Opis:
    Fine strontium hexaferrite particles were prepared by the low temperature auto-combustion method. Aqueous solution of the corresponding metal salts and a combustible co-reactant compound - glycine were used as initial precursor. The resulting powders were calcined at various temperatures from 750°C up to 1100°C. The microstructure and magnetic properties were investigated by the Mössbauer spectroscopy, thermomagnetic analysis, scanning electron microscopy, and vibrating magnetometer. The particles of sizes less than 1 μm have monophasic hexagonal structure. Coercivity $H_c$≈400 kA/m, specific saturation polarization $J_{s-m} ≈ 72×10^{-6} Tm^3 kg^{-1}$ and remanence polarization $J_{s-r} ≈ 43×10^{-6} T m^3 kg^{-1}$ were achieved for the Sr ferrite annealed at 850°C for 6 h.
    Źródło:
    Acta Physica Polonica A; 2008, 113, 1; 557-560
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Electric and Magnetic Properties of Hydrogels Doped with Cu Ions
    Autorzy:
    Coşkun, R.
    Okutan, M.
    Yalçın, O.
    Kösemen, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1418231.pdf
    Data publikacji:
    2012-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    52.25.Mq
    82.35.-x
    42.70.Jk
    64.60.-i
    76.30.-v
    Opis:
    The electric and magnetic properties of Cu doped and pure/undoped hydrogels were investigated by impedance spectroscopy and electron spin resonance techniques, respectively. The capacitance and dissipation factor (tan δ) were measured in the frequency range of 100 Hz-10 MHz at room temperature. The Cole-Cole plots for the Cu doped dry and pure dry hydrogels have been used to describe the characteristic change of electrical properties in mentioned temperature interval. The comparison between Cu ions doped and pure/undoped samples is done using the impedance spectroscopy and the electron spin resonance techniques. Electron spin resonance signal for pure, Cu doped wet and Cu doped dry samples are not any power absorption signal, near the symmetric with respect to the resonance field values according to the dry sample and asymmetric for resonance field/base line, respectively.
    Źródło:
    Acta Physica Polonica A; 2012, 122, 4; 683-687
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Swelling, Mechanical and Antimicrobial Studies of Ag/P(HEMA/IA)/PVP Semi-IPN Hydrogel Hybrids
    Autorzy:
    Jovašević, J.
    Dimitrijević, S.
    Filipović, J.
    Tomić, S.
    Mićić, M.
    Suljovrujić, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1503410.pdf
    Data publikacji:
    2011-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    36.20.Fz
    82.35.Jk
    81.05.Qk
    81.05.Lg
    61.25.hp
    82.35.-x
    62.20.-x
    81.70.Bt
    Opis:
    A simple and fast approach to the design and production of new hybrid polymeric biomaterials with silver particles is presented in this work. Silver/semi-interpenetrating network hybrid hydrogels (Ag/semi-IPNHHs) were prepared through an optimized solution crosslinking copolymerization of 2-hydroxyethyl methacrylate (HEMA) and itaconic acid (IA), in the presence of PVP, a silver salt and a reducing "green" agent (Ag/P(HEMA/IA)/PVP). PVP was chosen due to its protective, reduction, and nucleation properties in the production of metal particles. The structure of the Ag/semi-IPNHH was characterized by Fourier transform infrared spectroscopy (FTIR). The presence of silver and PVP in the network was confirmed by FTIR spectra. The results obtained by dynamic mechanical analysis (DMA) showed good mechanical properties for all samples. The swelling studies of Ag/P(HEMA/IA)/PVP were conducted in the temperature range of 25-55°C, in the buffer of pH 7.40. The Ag/semi-IPNHH showed temperature-sensitive swelling properties, with the lower critical solution temperature (LCST) values in the physiologically interesting interval. The antimicrobial activity of the samples was tested using E. coli, S. aureus and C. albicans pathogens. It was concluded that the antimicrobial potential depends on the hydrogel's composition and the type of microbes
    Źródło:
    Acta Physica Polonica A; 2011, 120, 2; 279-283
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spectroscopic Studies of Poly(ε-Caprolactone)/Sodium Montmorillonite Nanocomposites
    Autorzy:
    Krzaczkowska, J.
    Fojud, Z.
    Kozak, M.
    Jurga, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2043539.pdf
    Data publikacji:
    2005-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    91.60.-x
    71.20.Tx
    78.30.Jw
    36.20.-r
    33.25.+k
    61.10.-i
    Opis:
    Polymer-layered silicate nanocomposites belong to a new class of hybrid materials consisting of organic-synthetic polymer matrix and inorganic filler-layered structure clay minerals. The paper presents the results of FTIR, NMR, and SAXS studies of poly(ε-caprolactone)/sodium montmorillonite nanocomposites. We observed a correlation between the concentration of poly(ε-caprolactone) in nanocomposite samples and structural changes both of the clay mineral and the intercalated polymer. Stiffening of the clay structure appears as a result of poly(ε-caprolactone) intercalation into a clay structure. $\text{}^{27}$Al NMR studies indicated in nanocomposites two non-equivalent sites of aluminium ions, i.e. in octahedral and tetrahedral coordination, whereas in the montmorillonite clay structure the aluminium ions are located in the interlayer space too. We found also that the temperatures of structural changes and softening process of poly(ε-caprolactone) chains in the nanocomposites depend on the concentration of poly(ε-caprolactone).
    Źródło:
    Acta Physica Polonica A; 2005, 108, 1; 187-196
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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