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    Wyświetlanie 1-73 z 73
    Tytuł:
    XPS Study of "infinite Chain" Ca$\text{}_{2}$CuO$\text{}_{3}$ and Ca$\text{}_{0.5}$Sr$\text{}_{0.5}$CuO$\text{}_{2}$ Compounds
    Autorzy:
    Jacyna-Onyszkiewicz, I.
    Poltoracky, Yu. B.
    Powiązania:
    https://bibliotekanauki.pl/articles/2013234.pdf
    Data publikacji:
    2000-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    79.60.-i
    74.72.-h
    74.72.Jt
    Opis:
    Al K$\text{}_{α}$ excited photoelectron spectra (X-ray photoelectron spectroscopy) of the O 1s, Cu 2p, Ca 2p, Sr 3d core levels were measured for "infinite chain" Ca$\text{}_{2}$CuO$\text{}_{3}$ and Ca$\text{}_{0.5}$Sr$\text{}_{0.5}$CuO$\text{}_{2}$ compounds. The analysis indicates that for Ca$\text{}_{2}$CuO$\text{}_{3}$ the surface electronic structure is strongly influenced by a humid atmosphere. The surface layer is formed predominantly by copper hydroxide. The minor features of Cu 2p and O 1s are characteristic of the bulk bonding states. The valences of the Cu, Ca, and Sr atoms are close to 2+. The core electron binding energies (≈ 934 eV peak) are due to the 2p$\text{}_{3}\text{}_{/}\text{}_{2}$ 3d$\text{}^{10}$L$\text{}^{1}$ configuration of Cu(II) ions in the square planar coordination for both samples.
    Źródło:
    Acta Physica Polonica A; 2000, 97, 3; 603-606
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Some Electronic Properties of Sr$\text{}_{1-x}$A$\text{}_{x}$CuO$\text{}_{2+δ}$ where A=La, K, and Ca
    Autorzy:
    Onyszkiewicz, I.
    Czarnecki, P.
    Poltoracky, Yu. B.
    Zimpel, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1929860.pdf
    Data publikacji:
    1994-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.30.+h
    72.15.-v
    76.30.Fc
    Opis:
    The electronic properties of Sr$\text{}_{1-x}$A$\text{}_{x}$CuO$\text{}_{2+δ}$ (A = La, K, Ca) were examined. The crystal structure of the synthesized compounds was identified as orthorhombic with some admixture of tetragonal phase. For Sr$\text{}_{1-x}$La$\text{}_{x}$CuO$\text{}_{2+δ}$ the insulator-metal like transition was observed with increasing La content. The d$\text{}_{x²-y²}$ ground state of Cu ions was deduced from electron spin resonance measurements. The electronic state of Cu ions and their surrounding local symmetry was also found to be La and oxygen content dependent.
    Źródło:
    Acta Physica Polonica A; 1994, 85, 2; 303-306
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Enhancing the Thermal Protective Performance of Firefighters Protective Fabrics by Incorporating Phase Change Materials
    Polepszenie właściwości termicznych odzieży ochronnej strażaków poprzez zastosowanie materiałów zmiennofazowych
    Autorzy:
    Zhu, F L
    Feng, Q Q
    Liu, R
    Yu, B
    Zhou, Y
    Powiązania:
    https://bibliotekanauki.pl/articles/231560.pdf
    Data publikacji:
    2015
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    phase change material
    fire protective clothing
    thermal protective performance
    materiał zmiennofazowy
    odzież ochronna
    ochrona termiczna odzieży
    Opis:
    A composite fabric consisting of an outer shell, moisture barrier, thermal liner and comfort layer used for firefighters’ protective clothing, was incorporated with shape-stabilised phase change material (PCM) powder in order to improve the thermal protection capability provided by thermal protective clothing. Then we conducted a series of FTP (fire testing protection) experiments to investigate the effects of PCM location and phase change temperature on the heat protection efficiency of firefighters’ protective fabrics (FFPFs). Simultaneously the thermoregulation performance of the composite fabrics with PCMs was evaluated by using step-cooling experimental technology during the cooling process. Data from the FTP tests were also compared with those from the existing enthalpy formulation model of heat transfer through FFPFs embedded with PCMs. It was concluded that the use of PCMs could improve the heat buffering capacity. However, as PCM has a moderate melting temperature, it is better than the other two samples because they have a lower and higher melting temperature. Therefore PX 52 PCMs (melting temperature: 47 - 53 °C) could provided the maximum heat protection time compared with the other two kinds of PCMs.
    W celu zwiększenia zdolności ochrony termicznej odzieży ochronnej dla strażaków, przy użyciu stabilizowanego materiału zmiennofazowego w postaci proszku, stworzono materiał kompozytowy składający się z powłoki zewnętrznej, warstwy stanowiącej barierę dla wilgoci, wkładki termicznej i warstwy zapewniającej komfort. W celu zbadania wpływu umieszczenia materiału zmiennofazowego i temperatury przemiany fazowej na efektywność ochrony cieplnej przeprowadzono serię eksperymentów (testy ochrony przeciwpożarowej). Jednocześnie oceniono zdolność termoregulacji tkanin kompozytowych, oceny tej dokonano stosując technikę stopniowego chłodzenia. Dane z badań porównano z danymi teoretycznymi. Stwierdzono, że stosowanie materiałów zmiennofazowych może poprawić zdolność buforowania ciepła. Określono optymalny rodzaj materiału zmiennofazowego.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2015, 2 (110); 68-73
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fiber-optic accelerometer based on a modal interferometer using a thin-core fiber
    Autorzy:
    Wang, X
    Wu, X
    Li, S
    Ge, Q
    He, T
    Yu, B
    Powiązania:
    https://bibliotekanauki.pl/articles/174927.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    fiber-optic accelerometer
    modal interferometer
    thin-core fiber
    Opis:
    A compact fiber-optic accelerometer based on a modal interferometer, which is fabricated by misaligned splicing of a short section of a thin-core fiber between two sections of a standard single-mode fiber, is demonstrated experimentally. A spectrum analysis method is used to detect an acceleration signal rapidly. The experimental results show that the thin-core fiber-based fiber-optic accelerometer has a minimum detectable acceleration of 3.3×10–3g (g – gravitational acceleration), and a wide frequency response range from 10 to 1200 Hz. Moreover, the proposed accelerometer exhibits the advantages of low cost, simple structure and easy fabrication.
    Źródło:
    Optica Applicata; 2015, 45, 3; 317-325
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    LMPP Effects on Morphology, Crystallization, Thermal and Mechanical Properties of iPP/LMPP Blend Fibres
    Wpływ polipropylenu o małej masie cząsteczkowej (LMPP) na morfologię, krystalizację, właściwości termiczne i mechaniczne włókien mieszanych iPP/LMPP.
    Autorzy:
    Hussain, M.
    Zhu, F.
    Yu, B.
    Han, J.
    Memon, H.
    Yasin, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/232887.pdf
    Data publikacji:
    2018
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    polypropylene
    iPP/LMPP blends
    morphology
    crystallinity
    low molecular low modulus polypropylene
    polipropylen
    mieszanki iPP-LMPP
    morfologia
    krystaliczność
    niski poziom cząsteczkowy
    polipropylen o niskim module sprężystości
    Opis:
    The thermal properties and morphological characterisation of isotactic polypropylene (iPP) homopolymer and its blends with low molecular low modulus polypropylene (LMPP) were studied. Firstly blends were prepared with variant LMPP contents, and their properties were characterised using SEM, DSC, XRD, and DMA. Later the mechanical properties of iPP/LMPP blend fibres were investigated. SEM results showed that the iPP/LMPP blends produced smoother surfaces when the LMPP content was increased, as well as the miscibility. All the Tg values with different LMPP percentages were in-between pure iPP and LMPP. The XRD results indicated the LMPP percentage decreased along with the degree of crystallinity of the iPP/LMPP blends (5% to 15%), which increased and then decreased as compared to pure iPP. The elongation at break increased when the LMPP content increased, with the maximum elongation at break of the LMPP 25% blend reaching 12.95%, which showed great stretch-ability, whereas the elastic modulus of iPP/LMPP blends decreased.
    W pracy badano właściwości termiczne i morfologię homopolimeru izotaktycznego polipropylenu (iPP) i jego mieszanek z polipropylenem o małej masie cząsteczkowej (LMPP). Zastosowano następujące proporcje mieszania iPP/LMPP (wt/wt): 95/5, 90/10, 85/15, 80/20 i 75/25, zdefiniowano je odpowiedni: 5%, 10%, 15 %, 20% i 25%. Właściwości włokien mieszanych iPP/LMPP porównano do właściwości czystego PP i LMPP. Włókna mieszane zbadano za pomocą SEM, DSC, XRD i DMA. Następnie zbadano mechaniczne właściwości włókien iPP/LMPP. Wyniki SEM wykazały, że wraz ze zwiększeniem zawartości LMPP powierzchnia włókien charakteryzowała się większą gładkością. Wszystkie wartości Tg włókien mieszanych były pośrednie pomiędzy czystym iPP i LMPP. Stwierdzono, że wydłużenie przy zerwaniu zwiększyło się wraz ze wzrostem zawartości LMPP, przy maksymalnym wydłużeniu przy zerwaniu 12,95%, dla włókien z zawartością 25% LMPP, co wskazywało na dużą rozciągliwość, podczas gdy moduł sprężystości wzdłużnej włókien iPP / LMPP zmniejszył się.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2018, 2 (128); 26-31
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sensitive detection of acetylene by second derivative spectra with tunable diode laser absorption spectroscopy
    Autorzy:
    Deng, H.
    Sun, J.
    Li, P.
    Liu, Y.
    Yu, B.
    Li, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/174963.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    tunable diode laser absorption spectroscopy
    TDLAS
    signal processing
    Savitzky–Golay filter
    trace gas detection
    Opis:
    A tunable diode laser absorption spectrometer was developed for trace acetylene gas analysis, the system performance was evaluated by combing an appropriate digital signal processing methods, i.e., Savitzky–Golay smoothing and differentiation algorithm. The calculation of the derivative spectra by this method is accompanied by simultaneous data smoothing. Based on the 2nd deriv- ative spectra detection method, the Allan variance technique indicates a C2H2 detection limit of 1.7ppm for 1-s averaging time, and a minimum noise level of 62ppb (parts per billion), at the optimum integration time of ~60s. The calculated 2nd derivative spectra with better resolution, lower detection limits, save signal processing time, and improve the ability to distinguish unresolved spectral signals.
    Źródło:
    Optica Applicata; 2016, 46, 3; 353-363
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Восстание 1916 г. в оценке первых национальных лидеров Казахстана и Кыргызстана 1920–1930-х гг.
    The revolt of 1916 in the assessment of the first national leaders of Kazakhstan and Kyrgyzstan of the 1920–1930s
    Autorzy:
    Сарсенбаев, Булат С.
    Powiązania:
    https://bibliotekanauki.pl/articles/2173908.pdf
    Data publikacji:
    2016-12-31
    Wydawca:
    Wydawnictwo Adam Marszałek
    Tematy:
    powstanie
    polityka kolonialna
    emigranci
    Kazachowie
    Kirgizi
    T. Ryskulov
    Yu. Abdrakhmanov
    B. Isakeev
    revolt
    colonial policy
    immigrants
    Kazakhs
    Kyrgyz
    Opis:
    In the article the assessment of the reasons and nature of revolt of 1916 by the first national leaders of Turkistan T. Ryskulov, Yu. Abdrakhmanov and B. Isakeev are given in the aspect of historiography.
    W artykule przedstawiono historioznawczą ocenę przyczyn i charakteru powstania z 1916 roku dokonaną przez pierwszych krajowych przywódców Turkiestanu – T. Ryskulova, Yu. Abdrakhmanova i B. Isakeeva.
    Źródło:
    Studia Orientalne; 2016, 2(10); 133-145
    2299-1999
    Pojawia się w:
    Studia Orientalne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Phase Diagram of Two-Axis Ferromagnet and Spectra of Coupled Magnetoelastic Waves
    Autorzy:
    Mitsay, Yu. N.
    Fridman, Yu. A.
    Kozhemyako, O. V.
    Kochmański, M. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2011089.pdf
    Data publikacji:
    1999-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.10.-b
    Opis:
    The phase diagram of strongly anisotropic two-axis ferromagnet at arbitrary orientation of external magnetic field is built. It is demonstrated that together with a ferromagnetic phase there is possible the existence of phases with a tensorial order parameter: quadrupolar or quadrupolar-ferromagnetic phases. Spectra of bound magnetoelastic waves are investigated. Besides it is demonstrated that at large enough magnetoelastic interaction there is possible an active interaction of a magnetic subsystem with longitudinally polarized acoustic mode which becomes a soft mode at the point of orientational phase transition.
    Źródło:
    Acta Physica Polonica A; 1999, 96, 3-4; 445-456
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Radiation Effects in DMAAS:Cr Ferroelectric Crystal
    Autorzy:
    Kapustianik, V.
    Czapla, Z.
    Eliyachevskyy, Yu.
    Korchak, Yu.
    Kulyk, B.
    Rudyk, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/2037039.pdf
    Data publikacji:
    2003-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.40.Ha
    64.70.Kb
    77.84.-s
    78.30.Hv
    Opis:
    This paper presents the results of investigations of the radiation effects in NH$\text{}_{2}$(CH$\text{}_{3}$)$\text{}_{2}$Al(SO$\text{}_{4}$)$\text{}_{2}$×6H$\text{}_{2}$O crystals doped with chromium. On the basis of absorption spectroscopy and resonance Raman scattering study it has been shown that comparatively low doses of radiation first of all causes recharging of Cr$\text{}^{3+}$ on Cr$\text{}^{4+}$ ions. Besides, the processes of dehydrogenation and the changes in arrangement of the hydrogen bond network were observed. These changes are followed by distortion of the complexes bonded by such a type of bonds.
    Źródło:
    Acta Physica Polonica A; 2003, 104, 6; 571-580
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dielectric Relaxation Phenomena in SBN Single Crystals Doped with Ce
    Autorzy:
    Korchak, Yu.
    Kapustianyk, V.
    Fedor, B.
    Girnyk, I.
    Eliyashevskyi, Yu.
    Powiązania:
    https://bibliotekanauki.pl/articles/1505140.pdf
    Data publikacji:
    2011-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    77.22.-d
    77.22.Ch
    77.22.Gm
    77.80.Jk
    Opis:
    The dielectric study of $Sr_{0.73}Ba_{0.27}Nb_2O_6:Ce$ (SBN) crystals along [010] crystallographic axis was performed in the temperature region of 310-360 K and frequency range from 25 Hz up to 1 MHz. The thermal dipole relaxation of quasi-Debye-type for this orientation of sample was observed in both investigated structural phases. The phase transition was most clearly seen from the temperature dependence of the relaxation time at $T_{c}$ = 320 K. The relaxation processes were related to the collective oscillations of the Nb-O bonds in the two different type corner-sharing $NbO_6$ octahedra aligned along c-axis.
    Źródło:
    Acta Physica Polonica A; 2011, 119, 6; 871-874
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of a One-Ion Anisotropy on Stabilization of the Long-Range Magnetic Order in Two-Dimensional Ferromagnet
    Autorzy:
    Mitsay, Yu. N.
    Fridman, Yu. A.
    Spirin, D. V.
    Kochmański, M. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2012959.pdf
    Data publikacji:
    2000-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.10.-b
    75.30.Kz
    Opis:
    In the paper the possibility of stabilization of the long-range magnetic order in a two-dimensional ferromagnetic with one-ion easy-plane anisotropy is explored. It is shown that at the presence of a small anisotropy in a two-dimensional ferromagnetic the long-range magnetic order is stabilized by magnetoelastic interaction. If one-ion anisotropy is comparable or even exceeds the exchange interaction in the system there exists a long-range non-vectorial quadrupolar tensorial magnetic order.
    Źródło:
    Acta Physica Polonica A; 2000, 97, 2; 355-360
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Pulsed Laser Deposition of Amorphous Co-Fe-Ni-Si-B Thin Films
    Autorzy:
    Gareev, R. R.
    Alimpiev, S. S.
    Bugoslavskii, Yu. V.
    Nikiforov, S. M.
    Maslov, A. I.
    Shubnii, G. Yu.
    Zherichin, A. N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1955481.pdf
    Data publikacji:
    1997-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Kj
    75.70.Ak
    Opis:
    Soft magnetic multicomponent Co-Fe-Ni-Si-B thin films have been grown by pulsed laser deposition onto single-crystal sapphire and silicon substrates. The static hysteresis measurements for different substrate temperatures are presented. Thin films with a coercive force smaller than 1 Oe were grown at substrate temperatures from 250°C to 350°C. X-ray diffraction measurements proved that the structure of films is amorphous. The surface morphology of grown thin films was observed by scanning electron microscopy. The chemical composition of deposited films corresponds to the composition of bulk alloy.
    Źródło:
    Acta Physica Polonica A; 1997, 91, 2; 321-324
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimization of linear parametric circuits in the frequency domain
    Autorzy:
    Shapovalov, Yu.
    Mandziy, B.
    Bachyk, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/410827.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Oddział w Lublinie PAN
    Tematy:
    symbolic frequency method
    objective function
    function – characteristics
    Opis:
    The possibility of application of the frequency symbolic method of analysis of linear parametric circuits to the decision of optimization tasks is considered. There are examples of optimization of single- and doublecircuit parametric amplifier using the objective function based on the calculation of parametric transfer function of a circuit with a symbolic representation of the parameters of the parametric capacity. By the frequency symbolic method the parametric transfer functions are approximated by trigonometric polynomials of Fourier.
    Źródło:
    ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2013, 2, 4; 73-77
    2084-5715
    Pojawia się w:
    ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Laser Assisted Au Nanocrystal Formation in Conditions of Surface Plasmon Resonance
    Autorzy:
    Fedorenko, L.
    Snopok, B.
    Yusupov, M.
    Lytvyn, O.
    Burlachenko, Yu.
    Powiązania:
    https://bibliotekanauki.pl/articles/1807920.pdf
    Data publikacji:
    2009-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.05.Bx
    81.16.Mk
    81.07.-b
    Opis:
    The possibility of the calibrated Au nanoparticles formation in conditions of surface plasmon resonance at irradiation of the Au film/glass structure by pulsed $YAG:Nd^{3+}$-laser radiation is investigated. Sizes of the Au fragments and their surface distribution were studied by the atom force microscopy. The effect of Au nanofragmentation was observed only at the second harmonic irradiation (λ = 0.532 μm). The large difference in the average values of Au nanoparticles sizes -[δ] and distributions between created in the resonance conditions, R = $R_{min}$, -[δ] ∼ 80 nm and in case out of resonance R ≠ $R_{min}$, -[δ] ∼ 1350 nm was established. A high degree of the height sizes homogeneity of Au nanoparticles has been shown by the histogram obtained from the atom force microscopy data. There was verified the conclusion about determining contribution of the plasmon subsystem field in nanofragmentation process of the Au film in the SPR conditions at high laser levels.
    Źródło:
    Acta Physica Polonica A; 2009, 115, 6; 1075-1077
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Identification of sonar detection signal based on fractional Fourier transform
    Autorzy:
    Wang, B.
    Tang, J.
    Yu, F.
    Zhu, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/259724.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    fractional Fourier transform
    watermark
    sonar
    Opis:
    Aiming at the source of underwater acoustic emission, in order to identify the enemy emission sonar source accurately. Using the digital watermarking technology and combining with the good time-frequency characteristics of fractional Fourier transform (FRFT),this paper proposes a sonar watermarking method based on fractional Fourier transform. The digital watermark embedding in the fractional Fourier transform domain and combined with the coefficient properties of the sonar signal in the fractional Fourier transform to select the appropriate watermark position. Using the different characteristics of the signals before and after embedding, an adaptive threshold was set for the watermark detection to realize the discrimination of sonar signals. The simulation results show the feasibility and has better resolution and large watermark capacity of this method, while the robustness of the watermark is better, and the detection precision is further improved.
    Źródło:
    Polish Maritime Research; 2018, S 2; 125-131
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic Properties of $Ho_{5}Ni_{2}In_{4}$
    Autorzy:
    Tyvanchuk, Yu.
    Penc, B.
    Szytuła, A.
    Zarzycki, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1538371.pdf
    Data publikacji:
    2010-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.30.Cr
    75.30.Kz
    Opis:
    X-ray diffraction and magnetic measurements of $Ho_{5}Ni_{2}In_{4}$ are reported. This compound crystallizes in the orthorhombic $Lu_{5}Ni_{2}In_{4}$-type structure. Magnetic data indicate ferromagnetic properties below $T_c$ = 30 K.
    Źródło:
    Acta Physica Polonica A; 2010, 117, 4; 599-600
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design method of winch driven by contactless magnetic coupling under deepwater
    Autorzy:
    Zhang, B.
    Wang, Z.
    Wang, T.
    Yu, H. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/258870.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    magnetic coupling
    winch
    graph analysis
    CAD
    Opis:
    Through the combination subject of scientific research, the design method of the winch driven by contactless magnetic coupling is researched for the core purpose of the turning shaft sealing in a deepwater environment. This method has six design phases, including domestic and foreign information query and retrieval, graphic analyses of relevant structures, innovative design of 2D assembly sketches, a theoretical computation of structure parameters, the 3D modeling and motion simulation and engineering drawing. This method is of generality, which can provide examples for the postgraduate students and engineering personnel in self-renovation design of scientific research.
    Źródło:
    Polish Maritime Research; 2015, S 1; 95-99
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Transport and Relaxation of Charge in Organic-Inorganic Nanocomposites
    Autorzy:
    Olenych, I.
    Aksimentyeva, O.
    Tsizh, B.
    Horbenko, Yu.
    Powiązania:
    https://bibliotekanauki.pl/articles/1030981.pdf
    Data publikacji:
    2018-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    73.50.-h
    73.61.Ph
    82.35.Np
    Opis:
    In this work the nanocomposites of poly(3,4-ethylenedioxythiophene) doped with poly(styrenesulfonate) host matrix with porous silicon and ZnO nanoparticles were manufactured. The charge transport and relaxation processes in organic-inorganic nanocomposites were analyzed based on complex studies of electrical conductivity and depolarization current in the wide temperature range. By means of impedance spectroscopy we have established that increase of content of ZnO nanoparticles causes the rise in the internal resistance of the hybrid films. Based on the spectra of thermally stimulated depolarization current the localized electron states in the experimental samples are found. The combination of the porous silicon and zinc oxide nanoparticles provides an increase of surface area of the sensors and their high sensitivity to water molecules.
    Źródło:
    Acta Physica Polonica A; 2018, 133, 4; 851-855
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Association of hemophagocytic lymphohistiocytosis with kidney lesions in acute African swine fever virus infection
    Autorzy:
    Karalyan, N.Yu.
    Tatoyan, M.R.
    Semerjyan, A.B.
    Nersisyan, N.H.
    Semerjyan, Z.B.
    Hakobyan, L.H.
    Karalyan, Z.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/6239.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Źródło:
    Annals of Parasitology; 2018, 64, 4
    0043-5163
    Pojawia się w:
    Annals of Parasitology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Light Harvesting Process in Purple Bacteria
    Autorzy:
    Krueger, B. P.
    Scholes, G. D.
    Yu, J.- Y.
    Fleming, G. R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1993667.pdf
    Data publikacji:
    1999-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.15.Mi
    82.20.Rp
    42.50.Md
    Opis:
    We present and review the results of fluorescence upconversion and photon echo experiments, and $ab initio$ calculations performed in our group within the last few years with respect to the light harvesting process in purple bacteria. Carotenoids transfer energy to bacteriochlorophyll (BChl) mainly via the carotenoid S$\text{}_{2}$ → BChl Q$\text{}_{x}$ pathway on a ~100 fs timescale. This transfer is reasonably reproduced by considering the Coulombic coupling calculated using the transition density cube method which is valid at all molecular separations. Carotenoids may also serve a role in mediating B800 → B850 energy transfer in LH2 by perturbing the transition density of the B850 as shown by ab initio calculations on a supermolecule of two B850 BChls, one carotenoid and one B800 BChl. Further calculations on dimers of B850 BChl estimate the intra- and interpolypeptide coupling to be 315 and 245 cm$\text{}^{-1}$, respectively. These interactions are dominated by Coulombic coupling, while the orbital overlap dependent coupling is ~20% of the total. Photon echo peak shift experiments (3PEPS) on LH1 and the B820 subunit are quantitatively simulated with identical parameters aside from an energy transfer time of 90 fs in LH1 and ∞ in B820, suggesting that excitation is delocalized over roughly two pigments in LH1. 3PEPS data taken at room and low temperature (34 K) on the B800-B820 suggest that static disorder is the dominant mechanism localizing excitation in LH1 and LH2. We suggest that the competition between the delocalizing effects of strong electronic coupling and the localizing effects of disorder and nuclear motion results in excitation in the B850 and B875 rings being localized on 2-4 pigments within approximately 60 fs.
    Źródło:
    Acta Physica Polonica A; 1999, 95, 1; 63-83
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Effect of High Co Addition on the Properties of $Fe_{79}Zr_{9}B_{12}$ and $Fe_{76}Zr_{9}B_{15}$ Alloys
    Autorzy:
    Yu, W.
    Long, D.
    Liu, Y.
    Sun, Y.
    Hua, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/1401884.pdf
    Data publikacji:
    2015-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    65.60.+a
    61.43.Dq
    Opis:
    Thermal properties, microstructure and magnetic properties of $Fe_{79}Zr_{9}B_{12},$ $Fe_{76}Zr_{9}B_{15},$ $Fe_{39.5}Co_{39.5}Zr_{9}B_{12}$ and $Fe_{38}Co_{38}Zr_{9}B_{15}$ alloys were investigated by differential thermal analysis, X-ray diffraction and vibrating sample magnetometer. High Co addition has a significant impact on the properties of alloys. High Co addition increases the main crystallization peak temperature and the crystallization activation energy. Moreover, high Co addition changes the crystallization products and influences the crystallization processes of $Fe_{79}Zr_{9}B_{12}$ and $Fe_{76}Zr_{9}B_{15}$ alloys. The specific saturation magnetization $(M_{s})$ increases and coercivity $(H_{c})$ decreases by high Co additions.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 3; 340-342
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Pharmacokinetics of the recombinant ovine interferon-tau in lambs
    Autorzy:
    Zhao, J.
    Yu, H.Y.
    Zhao, Y.
    Li, S.Q.
    Fu, X.L.
    Zhou, W.
    Xia, B.B.
    Wang, M.L.
    Chen, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087588.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    bioavailability
    ovine interferon-τ
    cytopathic effect inhibition assay
    pharmacokinetic study
    Źródło:
    Polish Journal of Veterinary Sciences; 2019, 1; 75-82
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Time-Resolved Microwave Spectroscopy of High Electron Mobility GaAs/AlGaAs Structures
    Autorzy:
    Khachepuridze, A.
    Ivanov, V. Yu.
    Godlewski, M.
    Regiński, K.
    Bugajski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1991552.pdf
    Data publikacji:
    1998-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    73.20.Dx
    76.40.+b
    76.70.Hb
    Opis:
    Mechanism of the optical detection of cyclotron resonance via emission from 2D electron gas in modulation doped quantum wells and in high electron mobility structures of GaAs/AlGaAs is discussed based on the results of time-resolved optical detection of cyclotron resonance. An important role of impact ionization processes is demonstrated. We also show that microwave radiation destroys emission enhancement at the Fermi level and the relevant mechanism is proposed.
    Źródło:
    Acta Physica Polonica A; 1998, 94, 3; 387-391
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Complex Magnetic Structure of Strongly Coupled Fe/Si Multilayers
    Autorzy:
    Dubowik, J.
    Stobiecki, F.
    Szymański, B.
    Kudryavtsev, Yu. V.
    Grabias, A.
    Kopcewicz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2013056.pdf
    Data publikacji:
    2000-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.70.-i
    68.55.-a
    76.50.+g
    Opis:
    Fe/Si multilayers with strong bilinear and biquadratic couplings were investigated. A complex structure revealed by the Mössbauer spectroscopy corresponds to multimode ferromagnetic resonance spectra in a non-saturated state. Simple dispersion relations for antiferromagnetic coupled bilayer structures are shown to be inapplicable to the Fe/Si multilayers with a strong biquadratic component to the antiferromagnetic bilinear coupling.
    Źródło:
    Acta Physica Polonica A; 2000, 97, 3; 451-454
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Elastic anisotropic and thermodynamic properties of I-4m2-BCN
    Autorzy:
    Xing, Mengjiang
    Li, Binhua
    Yu, Zhengttao
    Chen, Qi
    Powiązania:
    https://bibliotekanauki.pl/articles/1065017.pdf
    Data publikacji:
    2016-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    62.20.de
    63.20.dk
    65.40.-b
    71.15.Mb
    Opis:
    Based on the density functional theory and the quasi-harmonic Debye model, the structural and thermodynamic properties of I-4m2-BCN have been studied in this paper. Some structural parameters are presented in this work. All of these results are in excellent agreement with the other available results. The anisotropy of elastic properties are also studied systematically in this paper. Finally, the thermodynamic properties of I-4m2-BCN are also researched through the quasi-harmonic Debye model. The relations among the thermal expansion α, the Debye temperature Θ_{D}, the heat capacity C_V and C_P, the Grüneisen parameter γ , entropy S, and the Gibbs free energy G with pressure P and temperature T are studied systematically.
    Źródło:
    Acta Physica Polonica A; 2016, 129, 6; 1124-1130
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research and Development of $ZnBO_{4}$ (B = W, Mo) Crystal Scintillators for Dark Matter and Double Beta Decay Searching
    Autorzy:
    Dubovik, A.
    Vostretsov, Yu.Ya.
    Grinyov, B.
    Danevich, F.
    Kraus, H.
    Nagornaya, L.
    Mikhailik, V.
    Tupitsyna, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1549650.pdf
    Data publikacji:
    2010-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.10.Fq
    78.70.Ps
    Opis:
    Oxide crystal scintillators play a considerable role in fundamental and applied researches. However, working out of new generation of high-sensitivity equipment and new methods of research puts higher requirements. The $ZnBO_{4}$ (B = W, Mo) crystals were grown from charge in platinum crucibles with high frequency heating, using the Czochralski method. The raw powder with optimum composition was prepared by solid phase high temperature synthesis using ZnO and $BO_{3}$ (B = W, Mo) with 4-5N purity. Single crystals with sizes up to ∅ 50 × 100 mm were grown and scintillation elements of various sizes and shapes (cylinders, rectangular and hexahedron prisms) were produced. High spectrometric characteristics were obtained for $ZnWO_{4}:R$ = 8-10% under excitation by $\text{}^{137}Cs (E_{γ}$=662 keV), low radiation background (less than 0.2 mBq/kg) and low afterglow (0.002%, 20 ms after excitation). The obtained results demonstrate good prospects for $ZnWO_{4}$ and ZnMoO_{4} crystal scintillators for application in low-count rate experiments, searching for double beta decay processes, interaction with dark matter particles, and also studies of rare decay processes. The material has also a good potential for application in modern tomography, scintillation bolometers and for other major researches using scintillators.
    Źródło:
    Acta Physica Polonica A; 2010, 117, 1; 15-19
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Supercapacity of Soft-Expanded Graphite in Li-Intercalational Electric Current Generation
    Autorzy:
    Shvets, R.
    Grygorchak, I.
    Kurepa, A.
    Pokladok, N.
    Sementsov, Yu.
    Dovbeshko, G.
    Sheregii, Ye.
    Seredyuk, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402576.pdf
    Data publikacji:
    2015-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.16.Fg
    82.45.Vp
    Opis:
    A microwave-intercalation modification of natural graphite which ensures its effective use as a cathode material of Li-based sources of electric current is developed. Interconnection between the parameters of modification and thermodynamic and kinetic behavior of Li-intercalation electric current generation is established. On the basis of the obtained data from impedance spectroscopy, X-ray diffractometry analysis, and spectroscopy of the Raman scattering of light, the mechanism of the observed phenomena is suggested.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 2; 208-209
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fabrication and Research of Superhard (Zr-Ti-Cr-Nb)N Coatings
    Autorzy:
    Bondar, O.
    Postolnyi, B.
    Kravchenko, Yu.
    Shypylenko, A.
    Sobol, O.
    Beresnev, V.
    Kuzmenko, A.
    Zukowski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402215.pdf
    Data publikacji:
    2015-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.46.-w
    62.20.Qp
    Opis:
    This work presents the results of (Zr-Ti-Cr-Nb)N superhard coatings research. The samples were fabricated by the vacuum-arc deposition method (Arc-PVD). Structure, composition and properties of these coatings were studied. The study of coatings was carried out using scanning electron microscopy, energy dispersive spectroscopy, and X-ray diffraction. Hardness measurements and adhesion tests were performed. The coatings thickness was up to 6.2 μ m, nanocrystallites sizes ranged from 4 to 7.3 nm. Values of hardness and cohesive strength were H=43.7 GPa and $L_{C}$=62.06 N, respectively. The optimal conditions for coating deposition were found.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 5; 867-870
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Climatic signals in tree rings of Juniperus turkestanica in the Gulcha River Basin (Kyrgyzstan), reveals the recent wetting trend of high Asia
    Autorzy:
    Chen, F.
    He, Q.
    Bakytbek, E.
    Yu, S.-L.
    Zhang, R.-B.
    Powiązania:
    https://bibliotekanauki.pl/articles/41289.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Opis:
    Drought variability of Kyrgyzstan is an important component of climate change of high Asia. Long-term information about the history of drought is, however, limited because the instrumental records are short. Here, we developed three chronologies for juniper trees (Juniperus turkestanica) under different microsite conditions in the Gulcha River Basin, Kyrgyzstan. The three chronologies (GUL, GUR and GUD) were compared with climate data which covered the study area. Growth of the GUL site correlates positively with May–June precipitation of the current growing season and September precipitation of the previous year, but negatively with temperatures of prior July, current May and July. Growth of the GUR site correlates positively with precipitation of current May and September, and negatively with temperature of current June and July. Ring width at GUD site is negatively correlated with temperature of the current May and July, and positively correlated with precipitation of prior December and current September. Response analysis shows that water availability is the main factor limiting the radial growth of juniper trees at the GUL and GUD sites. Based on the relationships derived from climate response analyses, the potential of tree-ring chronologies from this species to provide drought reconstructions in the Gulcha River Basin has been established. The GUL chronology and other moisture sensitive tree-ring series from high Asia capture the recent wetting trend. The records contribute to a growing tree-ring network for high Asia, including sites in China, Kyrgyzstan, Pakistan and Tajikistan.
    Źródło:
    Dendrobiology; 2015, 74
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optical Spectroscopy of the $Nd^{3+}$ Luminescence Centres in the $Sr_{4}B_{14}O_{25}:Nd$ Crystal
    Autorzy:
    Padlyak, B.
    Ryba-Romanowski, W.
    Lisiecki, R.
    Oseledchik, Yu.
    Prosvirnin, A.
    Kudryavtcev, D.
    Svitanko, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1550132.pdf
    Data publikacji:
    2010-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.70.-a
    78.40.Ha
    78.55.Hx
    78.20.Bh
    Opis:
    Optical absorption, emission and luminescence kinetics of $Nd^{3+}$ centres in the new borate crystal with $Sr_{4}B_{14}O_{25}:Nd$ (Nd content 0.2 wt.%) composition are investigated and analysed. The oscillator strengths ($P_\text{theor}$ and $P_\text{exp}$) for observed absorption transitions and phenomenological intensity parameters $Ω_t$ ($Ω_2$=1.59×$10^{-20} cm^{-1}$, $Ω_{4}$ = 2.06 × $10^{-20} cm^{-1}$, and $Ω_{6}$ = 2.28 × $10^{-20} cm^{-1}$ were calculated based on the standard Judd-Ofelt theory. Using $Ω_t$ parameters the radiative transitions rates $(W_{r})$, branching ratios (β) and radiative lifetime $(τ_{rad})$ for $Nd^{3+}$ centres in the $Sr_{4}B_{14}O_{25}:Nd$ crystal were calculated and analysed. Measured lifetime ($τ_{exp}$ = 105 and 93 μs at T = 10 and 300 K, respectively) is compared with this calculated ($τ_{rad}$ = 331 μs) and quantum efficiency for $Nd^{3+}$ centres from $\text{}^{4}F_{3//2}$ emitting level in the $Sr_{4}B_{14}O_{25}:Nd$ crystal is estimated (η ≅ 30%). Incorporation peculiarities and local structure of $Nd^{3+}$ luminescence centres in the $Sr_{4}B_{14}O_{25}$ crystal and corresponding glass with $4SrO-7B_{2}O_{3}$ composition are discussed on the basis of referenced X-ray diffraction data and presented results.
    Źródło:
    Acta Physica Polonica A; 2010, 117, 1; 104-110
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Neutron Diffraction Studies of Tb_2Ni_{2-x}In Intermetallic Compounds
    Autorzy:
    Szytuła, A.
    Baran, S.
    Hoser, A.
    Kalychak, Ya.M.
    Penc, B.
    Tyvanchuk, Yu.
    Powiązania:
    https://bibliotekanauki.pl/articles/1399026.pdf
    Data publikacji:
    2013-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.25.-j
    75.47.Np
    75.50.Ee
    Opis:
    The magnetic ordering of the $Tb_2Ni_{1.78}In$ and $Tb_2Ni_2In$ have been studied by neutron diffraction measurements. $Tb_2Ni_{1.78}In$ with the tetragonal $Mo_2FeB_2$-type (space group P4/mbm, tP10) is antiferromagnet with the Néel temperature equal to 20 K. Below this temperature Tb moments form collinear magnetic structure commensurate with the crystal, described by the propagation vectors equal to (1/4, 1/4, 1/2). Magnetic moment equal to 7.60(6) $μ_{B}$ is parallel to c-axis. The Tb_2Ni_2In in the orthorhombic $Mn_2$ $lB_2$-type (space group Cmmm, oC10) was detected as an impurity in the studied sample. It orders antiferromagnetically below ≈ 100 K with collinear moment arrangement described by the propagation vector (1/2, 1/2, 1/2). t 1.6 K $μ_{Tb}$ = 6.33(14) $μ_{B}$ and is parallel to the c-axis.
    Źródło:
    Acta Physica Polonica A; 2013, 124, 6; 994-997
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of the Thermal Treatment on the Microstructure and Magnetic Property of $Fe_{68}Zr_{20}B_{12}$ Alloy Prepared by Mechanical Alloying
    Autorzy:
    Sun, Y.
    Yu, W.
    Hua, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/1505353.pdf
    Data publikacji:
    2011-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    68.37.Lp
    61.05.Qr
    Opis:
    $Fe_{68}Zr_{20}B_{12}$ amorphous alloy prepared by mechanical alloying technique of 60 h of duration was annealed at different temperatures (420-720°C) during 1 h. Microstructure and magnetic property of as-milled and annealed alloy were investigated by X-ray diffraction, transmission electron microscopy, the Mössbauer spectroscopy and vibrating sample magnetometer techniques. $Fe_{68}Zr_{20}B_{12}$ powders milled during 60 h exhibit amorphous character. After annealing at 420°C, α-Fe phase precipitates from amorphous matrix. Transmission electron microscopy analysis shows the nucleation and growth of α-Fe grains. The Mössbauer results of the annealed alloy at 670°C show that the $Fe_3B$ phase precipitates already and there is still remaining amorphous phase. Coercivity increases with increasing annealing temperature, which is closely related to the microstructures after annealing.
    Źródło:
    Acta Physica Polonica A; 2011, 119, 3; 374-377
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of non-autoclaved foam-concrete beams reinforced with bamboo
    Autorzy:
    Demchyna, B.
    Lysiuk, S.
    Famulyak, Yu.
    Powiązania:
    https://bibliotekanauki.pl/articles/378666.pdf
    Data publikacji:
    2019
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    lateral bending
    reinforced concrete beams
    lightweight foam-concrete
    bamboo reinforcement
    gięcie boczne
    belka żelbetowa
    lekki beton piankowy
    wzmocnienie bambusowe
    Opis:
    Purpose: of this paper presents the experimental results of a study of strength and flexural behaviour of non-autoclaved foam-concrete beams reinforced with bamboo Design/methodology/approach: Six experimental samples of reinforced lightweight foamed concrete beams with hardened density D800 and D1200 with the same bamboo reinforcement were tested on lateral bending. Findings: A low level of anchoring of bamboo reinforcement in foam-concrete beams can provide their premature destruction. Research limitations/implications: Next experiments should be provided for improving the anchoring of bamboo reinforcement such as the bad adhesion between the bamboo and foam-concrete caused premature destruction of experimental samples. Practical implications: Replacement of steel reinforcement on the bamboo one in foamconcrete structures can be economical benefit. Originality/value: Increasing of experimental base leads to developing and creating new building standards in the nearest future.
    Źródło:
    Archives of Materials Science and Engineering; 2019, 96, 2; 56-62
    1897-2764
    Pojawia się w:
    Archives of Materials Science and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetoelastic Properties of La$\text{}_{0.744}$Ba$\text{}_{0.186}$MnO$\text{}_{3}$ Single Crystals
    Autorzy:
    Bukhantsev, Yu.
    Mukovskii, Ya. M.
    Vasiliev, S.
    Kundys, B.
    Szymczak, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/2037121.pdf
    Data publikacji:
    2004
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.47.Lx
    75.30.Gw
    75.80.+q
    Opis:
    Magnetoelastic properties of La$\text{}_{0.744}$Ba$\text{}_{0.186}$MnO$\text{}_{3}$ single crystals have been studied. The basic magnetoelastic constants of the crystal have been estimated using the data of magnetostriction and magnetization measurements, which have been carried out in [010] and [110] crystallographic directions in a wide temperature range from 10 K to 150 K. The anomaly of the thermal expansion has been observed at about 185 K. Near this anomaly two almost degenerated phase transitions have been observed. One of these transitions may be related to the structural phase transition, while the second one to the occurrence of spontaneous strains. The magnetostriction of La$\text{}_{0.744}$ Ba$\text{}_{0.186}$MnO$\text{}_{3}$ single crystal seems to arise due to the effect of applied field on the spontaneous strains.
    Źródło:
    Acta Physica Polonica A; 2004, 105, 1-2; 155-162
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Method of safe landing the emergency quadrocopter
    Metoda bezpiecznego lądowania awaryjnego kwadrokoptera
    Autorzy:
    Blagitko, B.
    Mochulsky, Yu.
    Powiązania:
    https://bibliotekanauki.pl/articles/408424.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
    Tematy:
    quadrocopter
    3-axis gyroscope
    3-axis accelerometer
    3-axis magnetometer
    kwadrokopter
    żyroskop 3-osiowy
    3-osiowy akcelerometr
    3-osiowy magnetometr
    Opis:
    By means of mathematical modelling, the main features of emergency landing of quadrocopter are determined. The results of simulate landings of the quadrocopter in cases of failure of one of four pairs of electric motor screw are given. The methods of safe landing of an unmanned quadrocopter in case of failure of one of four pairs of motor-screw are proposed. The basis of the proposed methods is to use a parachuting effect. Parachuting achieved by forced off the power of the motor, which is located at the opposite end of the same yoke as faulty motor. As a result, the vertical speed of the quadrocopter at the time of landing significantly decreases in comparison with the speed of free fall.
    Podstawowe cechy awaryjnego lądowania bezzałogowego kwadrokoptera zostały opisane metodami modelowania matematycznego. Zaproponowano metodę bezpiecznego lądowania bezzałogowego kwadrokoptera w przypadku awarii jednego z czterech par silnik-wirnik. Podstawą proponowanej metody jest zastosowanie efektu spadochronu. Efekt spadochronu jest osiągany poprzez przymusowe wyłączenia zasilania silnika elektrycznego, który znajduje się na przeciwległym końcu belki z uszkodzonym silnikiem. W rezultacie prędkość pionowa kwadrokoptera w momencie lądowania znacząco maleje w stosunku do prędkości swobodnego spadania.
    Źródło:
    Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska; 2018, 8, 4; 44-47
    2083-0157
    2391-6761
    Pojawia się w:
    Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermal Behavior and Crystallization of $Fe_{81 - x}Co_{x}Zr_7Nb_2B_{10}$ (x = 2, 4, 6) Alloys
    Autorzy:
    Yu, W.
    Sun, Y.
    Liu, L.
    Dong, L.
    Hua, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/1492773.pdf
    Data publikacji:
    2011-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    65.60.+a
    61.43.Dq
    Opis:
    Thermal behavior and microstructure of $Fe_{81 - x}Co_{x}Zr_7Nb_2B_{10}$ (x = 2, 4, 6) alloys were investigated by differential thermal analysis and X-ray diffraction. Both the supercooled liguid region Δ $T_{x}$ and the first crystallization peak temperature $T_{p1}$ are the lowest and the span Δ $T_{p}$ between $T_{p1}$ and $T_{p2}$ is the highest when 4 at.% Fe is substituted by Co. The crystallization activation energy $E_{p1}$ for $Fe_{75}Co_6Zr_7Nb_2B_{10}$ alloy is the minimum for the heating rates ν = 5-20 K/min. $E_{p1}$ for $Fe_{77}Co_4Zr_7Nb_2B_{10}$ alloy is the minimum for the heating rates ν = 20 - 50 K/min. The crystallization processes of $Fe_{81 - x}Co_{x}Zr_7Nb_2B_{10}$ (x = 2, 4, 6) amorphous alloys are similar on the whole, which is as follows: amorphous → amorphous + α-Fe(Co) → α-Fe(Co) + $Fe_3Zr$ + $Fe_2Nb_{0.4}Zr_{0.6}$.
    Źródło:
    Acta Physica Polonica A; 2011, 120, 6; 1034-1036
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Real-time optical demultiplexing with the chirped pulses
    Autorzy:
    Li, Y.
    Zhang, X.
    Yuan, J.
    Kang, Z.
    Sang, X.
    Kang, S.
    Kang, X.
    Yan, B.
    Wang, K.
    Yu, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/175106.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    linearly chirped pulse
    parametric process
    real-time optical demultiplexing
    Opis:
    A scheme for real-time optical demultiplexing is proposed by utilizing the time-broadened and linearly chirped pulses instead of the conventional mode-locked pulses. The copies of the optical-time-division-multiplexed signal are acquired through a dual-pump parametric gate and used as the parametric multicast block. Simulation results show that the demultiplexing from 160 Gb/s down to sixteen 10 Gb/s tributaries can be achieved only by using a sampling source of 10 GHz. The proposed scheme can effectively reduce the complexity of parallel processing, and find important applications in the high-speed all-optical signal processing.
    Źródło:
    Optica Applicata; 2018, 48, 4; 621-632
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Photoluminescence Studies of Cubic Phase GaN Grown by Molecular Beam Epitaxy on (001) Silicon Covered with Sic Layer
    Autorzy:
    Godlewski, M.
    Ivanov, V. Yu.
    Bergman, J. P.
    Monemar, B.
    Barski, A.
    Langer, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1968103.pdf
    Data publikacji:
    1997-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.55.Eq
    78.47.+p
    Opis:
    In this work we evaluate optical properties of cubic phase GaN epilayers grown on top of (001) silicon substrate prepared by a new process. Prior to the growth Si substrate was annealed at 1300-1400°C in propane. The so-prepared substrate is covered with a thin (≈ 4 nm) SiC wafer, which allowed a successful growth of good morphological quality cubic phase GaN epilayers. The present results confirm recent suggestion on smaller ionization energies of acceptors in cubic phase GaN epilayers.
    Źródło:
    Acta Physica Polonica A; 1997, 92, 4; 777-780
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic Structure of RCuIn (R = Nd, Tb, Ho, Er)
    Autorzy:
    Szytuła, A.
    Baran, S.
    Jaworska-Gołąb, T.
    Penc, B.
    Zarzycki, A.
    Stűsser, N.
    Arulraj, A.
    Tyvanchuk, Yu.
    Powiązania:
    https://bibliotekanauki.pl/articles/1813175.pdf
    Data publikacji:
    2008-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.12.-q
    71.20.Lp
    75.25.+z
    75.50.Ee
    Opis:
    Magnetic and neutron diffraction measurements of RCuIn (R = Nd, Tb, Ho, Er) are reported. The compounds crystallize in the hexagonal ZrNiAl-type structure. The ZrNiAl lattice originates from a distortion of a kagomélattice. The studied compounds are antiferromagnets with the Néel temperature equal to 4.9 K for R = Nd, 14.5 K for R = Tb, 4.5 K for R = Ho and 3.5 K for R = Er. The magnetic ordering is described by the propagation vectorwe k = (1/2, 1/2, $k_z$) with $k_z$ equal to 0.161(6) for R = Nd, 0.2213(5) for R = Tb, 0.2510(3) for R = Ho and 0 for R = Er. The magnetic structure is noncollinear with magnetic moments in the basal plane for R = Nd, Tb and Ho and collinear with magnetic moments parallel to the c-axis for R = Er. The observed magnetic ordering results from the competition between exchange interactions of the Ruderman-Kittel-Kasuya-Yosida type, the geometrical frustration of the rare-earth magnetic moments and the influence of the crystal electric field. The latter affects the direction of magnetic moments and is responsible for the magnetic crystalline anisotropy.
    Źródło:
    Acta Physica Polonica A; 2008, 113, 4; 1185-1192
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The elastic anisotropic and thermodynamic properties of I4mm-B₃C
    Autorzy:
    Fan, Qingyang
    Wei, Qun
    Chai, Changchun
    Yang, Yintang
    Yu, Xinhai
    Liu, Yang
    Zheng, Junping
    Zhou, Peikun
    Zhang, Dongyun
    Powiązania:
    https://bibliotekanauki.pl/articles/1075538.pdf
    Data publikacji:
    2016-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.15.Mb
    65.40.De
    62.20.de
    Opis:
    The structural, elastic anisotropy and thermodynamic properties of the I4mm-B₃C are investigated using first-principles calculations and the quasi-harmonic Debye model. The calculated elastic anisotropic suggest that I4mm-B₃C is elastically anisotropic with its Poisson ratio, shear modulus, the Young modulus, the universal anisotropic index, shear anisotropic factors, and the percentage of elastic anisotropy for bulk modulus and shear modulus. The quasi-harmonic Debye model, using a set of total energy versus molar volume obtained with the first-principles calculations, is applied to the study of the thermal and vibrational effects. The thermal expansions, heat capacities, the Grüneisen parameters and the Debye temperatures dependence on the temperature and pressure are obtained in the whole pressure range from 0 to 90 GPa and temperature range from 0 to 2000 K.
    Źródło:
    Acta Physica Polonica A; 2016, 129, 1; 103-107
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of Exciton Properties in Quantum Well Structures of ZnCdSe/ZnSe and ZnSe/ZnMgSSe
    Autorzy:
    Godlewski, M.
    Ivanov, V. Yu.
    Bergman, J. P.
    Monemar, B.
    Leonardi, K.
    Behringer, M.
    Hommel, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1969074.pdf
    Data publikacji:
    1998-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.35.-y
    73.20.Mf
    73.20.Dx
    Opis:
    Properties of excitons in quantum well structures of ZnCdSe/ZnSe and ZnSe/ZnMgSSe are compared. In ternary ZnCdSe quantum wells and at low temperature excitons are strongly localised. Weaker localization is observed in quantum well structures of ZnSe/ZnMgSSe. Present studies suggest formation of negatively charged excitons in the latter structures.
    Źródło:
    Acta Physica Polonica A; 1998, 94, 2; 313-316
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Isolation and characterization of novel human short-chain dehydrogenase/reductase SCDR10B which is highly expressed in the brain and acts as hydroxysteroid dehydrogenase*
    Autorzy:
    Huang, Chaoqun
    Wan, Bo
    Gao, Bo
    Hexige, Saiyin
    Yu, Long
    Powiązania:
    https://bibliotekanauki.pl/articles/1040586.pdf
    Data publikacji:
    2009
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    expression pattern
    clone
    brain
    hydroxysteroid dehydrogenase
    Opis:
    Hydroxysteroid dehydrogenase belongs to the subfamily of short-chain dehydrogenases/reductases (SDR), and 11-β-hydroxysteroid dehydrogenase catalyzes the interconversion of inactive glucocorticoids (cortisone in human, dehydrocorticosterone in rodents) and active glucocorticoids (cortisol in human, corticosterone in rodents). We report here the cloning and characterization of a novel human SDR gene SCDR10B which encodes a protein with similarity to 11β-hydroxysteroid dehydrogenase 1. SCDR10B was isolated from a human brain cDNA library, and was mapped to chromosome 19p13.3 by browsing the UCSC genomic database. It contains an ORF with a length of 858 bp, encoding a protein with a transmembrane helix and SDR domain. Its molecular mass and isoelectric point are predicted to be 30.8 kDa and 10.3 kDa, respectively. SCDR10B protein is highly conserved in mammals and fish. Phylogenetic tree analysis indicated that SCDR10B stands for a new subgroup in the 11β-hydroxysteroid dehydrogenase family. Northern blot analysis showed that SCDR10B was highly expressed in brain, and a strong expression signal was detected in hippocampal neurons by immunohistochemical analysis. RT-PCR and immunohistochemical analysis showed that SCDR10B was up-regulated in lung-cancer cell lines and human lung cancer. SCDR10B can catalyze the dehydrogenation of cortisol in the presence of NADP+, and therefore it is a hydroxysteroid dehydrogenase.
    Źródło:
    Acta Biochimica Polonica; 2009, 56, 2; 279-289
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    iTRAQ-based quantitative proteomics analysis reveals inhibitory mechanismsof the antimicrobial peptide MDAP-2 against Salmonella gallinarum
    Autorzy:
    Zhang, Y.
    Yu, S.
    Ying, X.
    Jia, B.
    Liu, L.
    Liu, J.
    Kong, L.
    Pei, Z.
    Ma, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087299.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Salmonella gallinarum
    AMP
    iTRAQ
    inhibitory mechanism
    Źródło:
    Polish Journal of Veterinary Sciences; 2020, 23, 3; 405-414
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect Of The Desorption-Recombination Temperature On The Microstructure And Magnetic Properties Of HDDR Processed Nd-Fe-B Powders
    Wpływ temperatury desorpcji-rekombinacji na mikrostrukturę i właściwości magnetyczne proszków Nd-Fe-B przetwarzanych metodą HDDR
    Autorzy:
    Lee, J.-G.
    Cha, H.-R.
    Liu, S.
    Yu, J.-H.
    Baek, Y.-K.
    Kwon, H.-W.
    Powiązania:
    https://bibliotekanauki.pl/articles/353723.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Nd-Fe-B
    HDDR
    permanent magnet
    grain boundary
    metoda HDDR
    magnes trwały
    granica ziarna
    Opis:
    The effect of the desorption-recombination temperature on the microstructure and magnetic properties of hydrogenation-disproportionation-desorption-recombination (HDDR) processed Nd-Fe-B powders was studied. The NdxB6.4Ga0.3Nb20.2Febal (x=12.5-13.5, at.%) casting alloys were pulverized after homogenizing annealing, and then subjected to HDDR treatment. During the HDDR process, desorption-recombination (DR) reaction was induced at two different temperature, 810°C and 820°C. The higher Nd content resulted in enhanced coercivity of the HDDR powder, and which was attributed to the thicker and more uniform Nd-rich phase along grain boundaries. But this uniform Nd-rich phase induced faster grain growth. The remanence of the powder DR-treated at 820°C is higher than that DR-treated at 810°C. In addition, it was also confirmed that higher DR temperature is much more effective to improve squareness.
    Źródło:
    Archives of Metallurgy and Materials; 2015, 60, 2B; 1499-1501
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optically Active Si:Er Layers Grown by the Sublimation MBE Method
    Autorzy:
    Stepikhova, M.
    Andreev, A.
    Andreev, B.
    Krasil'nik, Z.
    Shmagin, V.
    Kuznetsov, V.
    Rubtsova, R.
    Jantsch, W.
    Ellmer, H.
    Palmetshofer, L.
    Preier, H.
    Karpov, Yu.
    Piplits, K.
    Hutter, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/1992203.pdf
    Data publikacji:
    1998-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.15.Hi
    Opis:
    We report the first application of sublimation molecular beam epitaxy to grow uniformly and selectively doped Si:Er layers with Er concentration up to 5×10$\text{}^{18}$ cm$\text{}^{-3}$. The Hall concentration of electrons is about 10% of total Er contents. The mobility is 300-400 cm$\text{}^{2}$ V$\text{}^{-1}$ s$\text{}^{-1}$ at 300 K. All samples exhibit photoluminescence at 1.537 μm up to 100-140 K.
    Źródło:
    Acta Physica Polonica A; 1998, 94, 3; 549-554
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Superconductivity of Non-Strained PbTe-PbS and Strained PbTe-SnTe Superlattices
    Autorzy:
    Mironov, O. A.
    Chistyakov, S. V.
    Fedorenko, A. I.
    Shpakovskaya, L. P.
    Sipatov, A. Yu.
    Savitskii, B. A.
    Nashchekina, O. N.
    Oszwałdowski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1890800.pdf
    Data publikacji:
    1991-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    73.40.-c
    73.60.Fw
    74.60.-w
    Opis:
    A comparative study of structural and superconductive properties of semi conductor epitaxial superlattices PbTe-SnTe and PbTe-PbS grown on (001) KCl has been carried out. It has been found that the superconductivity of the PbTe-SnTe superlattices is caused by the stretching strain in the SnTe layers and it may be connected with the relative positions of L$\text{}_{8}^{+}$ and L$\text{}_{6}^{+}$ terms of PbTe and SnTe, respectively in the heterojunction. In contrast to the PbTe-SnTe superlattices, the superconductivity of the PbTe-PbS super lattices is found to be associated with regular misfit dislocation grids which are generated at the interfaces.
    Źródło:
    Acta Physica Polonica A; 1991, 80, 3; 329-332
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Barrier Structures on the Basis of Graded-Band-Gap CdHgTe Obtained by Evaporation-Condensation-Diffusion Method
    Autorzy:
    Świątek, Z.
    Vlasov, A. P.
    Ivashko, M. V.
    Petryna, R. L.
    Bonchyk, A. Yu.
    Sokolovskii, B. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/958223.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    obtaining photovoltaic structures
    barrier structures
    evaporation-condensation-diffusion method
    Opis:
    The paper presents the methods of obtaining photovoltaic structures based on CdXHg1-XTe graded-band-gap epitaxial layers. Barriers in these structures were formed by solid phase doping of the material with low-diffusing impurities (As). High-temperature diffusion of acceptor impurity (As) in intrinsically defective material of n-type conductivity as well as ion introducing the donor impurity (B) in uniformly doped during the epitaxy process material of p-type of conductivity have been used. The possibility of creating multi-element graded-band-gap photovoltaic structures suitable for broad band detection of infrared radiation as a result of epitaxial growth by evaporation-condensation-diffusion method has been demonstrated.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 1; 115-122
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Quantitative Analysis of Cryomilled Nanocrystalline Ti-6Al-4V Alloy Powder by X-Ray Diffraction
    Autorzy:
    Oh, M.
    Yu, H. K.
    Lee, J.-H.
    Oh, M. C.
    Jung, S.-H.
    Ahn, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/356265.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    nanocrystalline
    cryomilling
    Ti alloy
    X-ray diffraction
    size-strain plot method
    Opis:
    A nanocrystalline Ti alloy powder was fabricated using cryomilling. The grain size and lattice strain evolution during cryomilling were quantitatively analyzed using X-ray diffraction (XRD) based on the Scherrer equation, Williamson-Hall (W-H) plotting method, and size-strain (S-S) method assuming uniform deformation. Other physical parameters including stress and strain have been calculated. The average crystallite size and the lattice strain evaluated from XRD analysis are in good agreement with the result of transmission electron microscopy (TEM).
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 3; 1439-1442
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Forecasting business processes in the management system of the corporation
    Prognozowanie procesów biznesowych w systemie zarządzania korporacją
    Autorzy:
    Yaremko, Svetlana A.
    Kuzmina, Elena M.
    Savina, Nataliia B.
    Yepifanova, Iryna Yu.
    Gordiichuk, Halyna B.
    Mussayeva, Dinara
    Powiązania:
    https://bibliotekanauki.pl/articles/2174746.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
    Tematy:
    corporation
    management
    forecasting
    business process
    integrated system
    making effective management decisions
    korporacja
    zarządzanie
    prognozowanie
    proces biznesowy
    zintegrowany system
    podejmowanie efektywnych decyzji zarządczych
    Opis:
    One of the key issues in corporate management is business process management. That is why the greatest interest for company analysts is the issue of effective forecasting of business processes. In today's digitalization of the economy, integration and automation of business processes have become the main priorities for achieving efficiency and effectiveness of companies, and especially for effective management decisions. This problem can be solved with the help of integrated systems, which are tools for effective management decisions, modeling and optimization of business processes. The article provides an analytical review of known forecasting methods and identifies the features of their application, analyzes the advantages and disadvantages that will take them into account in modeling the company and promote economic development, competitiveness and optimize business processes.
    Jednym z kluczowych zagadnień w zarządzaniu przedsiębiorstwem jest zarządzanie procesami biznesowymi. Dlatego też największym zainteresowaniem analityków firmowych jest kwestia skutecznego prognozowania procesów biznesowych. W dobie dzisiejszej cyfryzacji gospodarki integracja i automatyzacja procesów biznesowych stały się głównymi priorytetami dla osiągnięcia sprawności i efektywności przedsiębiorstw, a przede wszystkim dla skutecznych decyzji zarządczych. Problem ten można rozwiązać za pomocą systemów zintegrowanych, które są narzędziami do podejmowania skutecznych decyzji zarządczych, modelowania i optymalizacji procesów biznesowych. W artykule dokonano analitycznego przeglądu znanych metod prognozowania i wskazano cechy ich zastosowania, przeanalizowano zalety i wady, które pozwolą uwzględnić je w modelowaniu przedsiębiorstwa i wspierać rozwój gospodarczy, konkurencyjność oraz optymalizować procesy biznesowe.
    Źródło:
    Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska; 2022, 12, 4; 53--59
    2083-0157
    2391-6761
    Pojawia się w:
    Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Variation of temperature field created at pulsed laser irradiation of amorphous Fe73.7Si15.5B7.4Nb2.4Cu1.0 alloy
    Autorzy:
    Nykyruy, Yu.S.
    Mudry, S. I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1940710.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Gdańska
    Tematy:
    laser irradiation
    temperature distribution
    amorphous materials
    numerical method of finite differences
    Opis:
    The temperature in the laser irradiation area of an amorphous iron-based ribbon was calculated. As a result of the calculation a spatial temperature distribution and its time dependence were structured which allowed reproducing the geometric and structural characteristics of exposed areas. Simultaneously, an irradiated amorphous alloy was investigated by scanning electron microscopy which allowed determining the geometric and structural characteristics of these areas experimentally and obtaining their dependencies on the laser pulse parameters. The results of theoretical calculations were compared with the experimental data.
    Źródło:
    TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2015, 19, 1; 75-82
    1428-6394
    Pojawia się w:
    TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Phase Transitions and Fundamental Ferroelectric Dispersion in DMAAl$\text{}_{1-x}$$Cr_{x}S$ Crystals
    Autorzy:
    Kapustianyk, V.
    Eliyashevskyy, Yu.
    Czapla, Z.
    Dacko, S.
    Czupiński, O.
    Rudyk, V.
    Serkiz, R.
    Sereda, S.
    Semak, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1399057.pdf
    Data publikacji:
    2015-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    77.84.-s
    77.80.B-
    77.22.Gm
    65.40.Ba
    Opis:
    This paper presents the results of investigations of the temperature dependence of heat capacity and dielectric dispersion in the vicinity of ferroelectric-ferroelastic phase transition of dimethylammonium metal sulphate hexahydrate crystals DMAAl$\text{}_{1-x}$$Cr_{x}S$. In particular, it is shown that the isomorphous substitution of metal ion noticeably changes the temperature of phase transition and parameters of the fundamental ferroelectric dispersion observed around $T_{c1}$. These changes are explained in terms of clusters sizes and dynamics in the framework of order-disorder type phase transition mechanism.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 3; 791-794
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fabrication and Electrical Characterization of PbS-EuS Ferromagnetic Semiconductor Microstructures
    Autorzy:
    Wrotek, S.
    Morawski, A.
    Tkaczyk, Z.
    Mąkosa, A.
    Wosiński, T.
    Dybko, K.
    Łusakowska, E.
    Story, T.
    Sipatov, A. Yu.
    Pécz, B.
    Grasza, K.
    Szczerbakow, A.
    Wróbel, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2038135.pdf
    Data publikacji:
    2004-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    73.61.Le
    75.30.Et
    75.70.Cn
    Opis:
    Current-voltage characteristics and temperature dependence of differential conductance were studied in lithographically patterned (lateral dimensions from 10 x 10 μm$\text{}^{2}$ to 100 x 100 μm$\text{}^{2}$) ferromagnetic EuS-PbS-EuS microstructures. Below the ferromagnetic transition temperature a 4% decrease in the structure conductance was observed for mutual antiferromagnetic orientation of magnetization vectors of ferromagnetic EuS layers.
    Źródło:
    Acta Physica Polonica A; 2004, 105, 6; 615-620
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Developing a set of measures to provide maximum hydraulic efficiency of gas gathering pipelines
    Autorzy:
    Volovetskyi, V. B.
    Uhrynovskyi, A. V.
    Doroshenko, Ya. V.
    Shchyrba, O. M.
    Stakhmych, Yu. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/368779.pdf
    Data publikacji:
    2020
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    well
    gas
    gas gathering pipeline
    hydraulic efficiency
    cleaning the inner cavity of pipelines
    studnia
    gaz
    rurociąg
    sprawność hydrauliczna
    Opis:
    Purpose: The purposes of this article are to study the effective ways of increasing the hydraulic efficiency of gas gathering pipelines of the Yuliivskyi oil and gas condensate production facility (OGCPF); to calculate the operation efficiency of gas gathering pipelines of the Yuliivskyi OGCPF and develop a set of measures to monitor their condition and improve their hydraulic characteristics; to investigate the technology of cleaning the inner cavity of flowlines of gas-condensate wells with foam, to perform the feasibility study on the prospects of its application in practice. Design/methodology/approach: The technology of cleaning the inner cavity of flowlines of gas-condensate wells with foam was investigated to objectively evaluate its application and determine the effectiveness of this measure. The research was carried out within the framework of research and development work by the specialists of the Ukrainian Scientific Research Institute of Natural Gases. Findings: The results of production studies showed that due to cleaning the flowlines of gas-condensate wells (No.85 and No.60) from the accumulation of liquid, the coefficients of their hydraulic efficiency increased by 12% and 7%, respectively. Measures taken to clean the inner cavity of the flowlines from liquid have proven their efficiency and can be recommended for other flowlines of wells at other production fields. Research limitations/implications: Based on the characteristics of gas gathering pipelines, it is reasonable to conduct experimental studies on the use of the proposed technology of cleaning the inner cavity with foam in the case of increasing its multiplicity. Practical implications: Using the wells of the Yuliivske oil and gas condensate field as case studies, the operating parameters were measured and the pressure losses along the length of the flowlines were calculated. According to the results of calculations at two wells (No.85 and No.60), a significant excess of the actual value of the flow friction characteristic over the theoretical value was established. To reduce excessive pressure losses due to the presence of liquid and improve the hydraulic characteristics of the wells, their inner cavities were cleaned using foam with the expansion ratio from 40 to 100. Originality/value: It is important to note that the advantages of foam piston include: ease of use, no occurrence of hydraulic shocks and preventing stuck during movement in the gas pipeline, application in both straight and inclined sections, no wear of the elements of the cleaning equipment, a rather efficient cleaning of gas pipelines.
    Źródło:
    Journal of Achievements in Materials and Manufacturing Engineering; 2020, 101, 1; 27-41
    1734-8412
    Pojawia się w:
    Journal of Achievements in Materials and Manufacturing Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Żywienie krów mieszanką płynną z wysokim udziałem wywaru z gorzelni rolniczych
    Kormlenie korov zhidkoj smes'yu s vysokim uchastiem bardy iz sel'skikh vinokurennykh zavodov
    Liquid mixture containing a large amount of distillers residue in dairy cow feedin
    Autorzy:
    Kazimierzak, B.
    Sendlewski, J.
    Wojciak, M.
    Zielinska, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/798940.pdf
    Data publikacji:
    1988
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Opis:
    В двух опытах проведенных в группах 26 и 22 коров низинной черно-пестрой породы определяли эффективность скармливания жидкой смеси составленной из барды, мелассы, соломистых компонентов, минеральных веществ и аммиачной воды как источника небелковых азотистых вществ в сравнении с рационом составленным из силоса, обезгорченного после экстракционного рапсового шрота и ячменной соломы. Использование жидкой смеси с участием барды в рационе с ячменной соломой давало более хорошие производственные эффекты. Были получены в первом опыте на 14,5, а во втором на 2056 высшие среднесуточные выходы молока от коровы. Различие в выходе молока между сравниваемыми группами коров оказалось статистически высокосуществетшым. Потребление овсяных единиц и общего белка на продукцию 1 кг молока было меньше в кормлении рационом с участием жидкой смеси на 15,3 - 12,0 овеянных единиц и 15,0 - 9,5% общего белка, чем в кормлении рационом с участием силоса.
    Two feeding trials on 48 milking cows divided into 2 groups were carried out. The aim of that study was to evaluate the feeding effectiveness of liquid distillers’ residue mixture consisted of the residue molasses, straw and ammonia water as non-protein nitrogen source. Control ration consisted of silage, debittered rapeseed meal (solvent extracted) and barley straw. The usage of liquid distillers’ residue mixture with the addition of barley straw gave better cow performance than the control diet. Average daily milk yield per cow in the experimental group was by 14,5% and by 20%, respectively in trial I and II, higher than in control one. The differences in milk yield observed between the compared groups of cows were statistically highly significant. Oat units and crude protein consumptions per 1kg milk were higher by 15,3 - 12% and 15 - 9,5% respectively, in the group fed the ration including liquid distillers’ residue mixture than in animals fed the control diet.
    Źródło:
    Zeszyty Problemowe Postępów Nauk Rolniczych; 1988, 350
    0084-5477
    Pojawia się w:
    Zeszyty Problemowe Postępów Nauk Rolniczych
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Opracowanie i walidacja skuteczności produktów fermentowanych na bazie Bacillus jako alternatywy dla antybiotyków u zwierząt domowych
    Autorzy:
    Cheng, Y.-H.
    Horng, Y.-B.
    Chen, W.-J.
    Hua, K.-F.
    Dybus, A.
    Hsiao, F.S.-H.
    Yu, Y.-H.
    Powiązania:
    https://bibliotekanauki.pl/articles/3136350.pdf
    Data publikacji:
    2021
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    domestic animal
    antibiotics alternative
    Bacillus-based fermented products
    validation
    efficacy
    Źródło:
    Acta Scientiarum Polonorum. Zootechnica; 2021, 20, 3; 23-34
    1644-0714
    Pojawia się w:
    Acta Scientiarum Polonorum. Zootechnica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dielectric and Birefringent Properties of [(CH$\text{}_{3}$)$\text{}_{2}$NH$\text{}_{2}$]$\text{}_{5}$Cd$\text{}_{2}$CuCl$\text{}_{11}$ Solid Solutions in the Region of Their Phase Transitions
    Autorzy:
    Eliyashevskyy, Yu.
    Kapustianyk, V.
    Dacko, S.
    Czapla, Z.
    Batiuk, A.
    Sveleba, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2044636.pdf
    Data publikacji:
    2006-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    65.40.-b
    77.22.Ch
    Opis:
    On the basis of the optical and dielectric investigations of [(CH$\text{}_{3}$)$\text{}_{2}$NH$\text{}_{2}$]$\text{}_{5}$Cd$\text{}_{2}$CuCl$\text{}_{11}$ solid solutions the existence of phase transitions at T$\text{}_{1}$=175 K and T$\text{}_{2}$=117.5 K was confirmed. Both phase transitions were found to be shifted toward lower temperatures with respect to the corresponding transitions in the "host" [(CH$\text{}_{3}$)$\text{}_{2}$NH$\text{}_{2}$]$\text{}_{5}$Cd$\text{}_{3}$Cl$\text{}_{11}$ crystals. It was found that the proton conductivity in [(CH$\text{}_{3}$)$\text{}_{2}$NH$\text{}_{2}$ ]$\text{}_{5}$Cd$\text{}_{2}$CuCl$\text{}_{11}$ crystals is realized through the Grotthus mechanism. The investigations of the birefringent properties confirmed existence of the structural changes at T$\text{}_{0}$=320 K connected with the complex co-operative effect involving weakening of the hydrogen bonds and modification of the Jahn-Teller distortion with temperature.
    Źródło:
    Acta Physica Polonica A; 2006, 109, 2; 171-178
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of bamboo vinegar powder on the expression of the immune-related genes MyD88 and CD14 in weaning piglets
    Autorzy:
    Qin, W.Y.
    Gan, L.N.
    Dong, L.
    Yu, L.H.
    Wu, S.L.
    Bao, W.B.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087674.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    bamboo vinegar powder
    pig
    antibiotics
    MyD88 gene
    CD14 gene
    Źródło:
    Polish Journal of Veterinary Sciences; 2018, 21, 3; 525-532
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ocena wzrostu niezawodności w bezzałogowym statku latającym podczas kolejnych faz badania w locie
    Reliability growth estimation for unmanned aerial vechicle during flight-testing phases
    Autorzy:
    Yu, Y.
    Cui, W.
    Song, B.
    Wang, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/301049.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
    Tematy:
    niezawodność
    wzrost niezawodności
    badanie wzrostu niezawodności
    metoda bayesowska
    reliability
    reliability growth
    reliability growth testing
    Bayesian method
    Opis:
    Samoloty muszą być testowane w locie podczas procesu ich opracowywania i dla zapewnienia niezawodności powinny przejść, podczas faz badania w locie, proces wzrostu niezawodności obejmujący kolejne etapy: testowania, poszukiwania ukrytego uszkodzenia, udoskonalania i ponownego testowania. Jednakże z powodu złożonej budowy samolotów i wysokich kosztów badań w locie, badania wzrostu niezawodności z reguły przeprowadza się na małych próbkach. Trudno jest zatem ocenić wzrost niezawodności w kolejnych fazach badań w locie. W niniejszej pracy do estymacji wzrostu niezawodności zastosowano metodę bayesowską dla dwumianowego wzrostu niezawodności opartą na rozkładzie a priori Dirichleta oraz obliczono parametry rozkładu a posteriori wykorzystując metodę symulacji Markov-Chain Monte Carlo. Metodę zastosowano w kolejnych fazach badań w locie bezzałogowego statku latającego (Unmanned Aerial Vehicle), a użyty przykład pokazuje, iż metoda oparta na rozkładzie a priori Dirichleta może skrócić czas badań w locie. Parametry rozkładu a priori łatwo jest potwierdzić na podstawie uprzednio znanych informacji. Proponowana metoda nadaje się do oceny badań wzrostu niezawodności podczas kolejnych etapów badań w locie.
    It is necessary for airplanes to be fl ight-tested during the development process, and they should pass the testing/failurefi nding/improvement/re-testing reliability growth process during the fl ight-testing phases to ensure its reliability. However, due to airplane complexity and the high costs of fl ight-testing, the reliability growth testing is usually done with small samples. It is thus diffi cult to estimate the reliability growth during the fl ight-testing phases. In this paper, Bayesian method for binomial reliability growth based on the Dirichlet prior distribution is applied to reliability growth estimation, and the parameters of the posterior distribution are calculated by using the simulation method of Markov-Chain Monte Carlo. The method is applied to the Unmanned Aerial Vehicle test fl ight phases, and the example shows that the method based on the Dirichlet prior distribution can save the fl ight-testing time. It is easy to confi rm the parameters of the prior distribution by using the prior information. The proposed method is suitable for reliability growth testing estimation during fl ight-testing stages.
    Źródło:
    Eksploatacja i Niezawodność; 2010, 2; 43-47
    1507-2711
    Pojawia się w:
    Eksploatacja i Niezawodność
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improvement of fidelity of moving objects classification in guard signaling complexes with seismic sensors
    Poprawa jakości klasyfikacji obiektów ruchomych w systemach alarmowych z wykorzystaniem czujników sejsmicznych
    Autorzy:
    Volochiy, B.
    Zmysnyi, M.
    Ozirkovskyy, L.
    Onyshchenko, V.
    Salnyk, Yu.
    Powiązania:
    https://bibliotekanauki.pl/articles/408347.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
    Tematy:
    seismic sensor
    guard radio electronic complex
    efficiency index
    czujnik sejsmiczny
    system alarmowy
    wskaźnik efektywności
    Opis:
    The effectiveness of guard signaling complexes (GSC), when there is an important validity of the classification of moving objects (MO), is evaluated by the following indexes: probability of GSC task execution; probability of partial fulfillment of the task; probability of user’s “deception”. Accordingly, the performance indicators of the GSC, in turn, depend on the indexes of the functionality of its constituents: probability of fixation of moving object by seismic sensor, probability of correct classification of MO type and probability of receiving radio signal by the system of receiving and displaying information (SRDI). The article describes a discrete-continuous stochastic model of of GSC reaction to moving object crossing control zone, in which three seismic sensors are installed. Majority principle of identifying the type of moving object was used on the receiving part of the complex. A comparative analysis of the effectiveness of guard signaling complexes using one, two and three sensors in control zone are carried out.
    Skuteczność systemów alarmowych, w przypadkach, gdy ważna jest dokładność klasyfikacji poruszających się obiektów, ocenia się za pomocą następujących wskaźników: prawdopodobieństwo wykonania zadania; prawdopodobieństwo częściowej realizacji zadania; prawdopodobieństwo "oszukiwania" użytkownika. W związku z tym, wskaźniki jakości działania systemów alarmowych zależą od wskaźników funkcjonalności ich komponentów: prawdopodobieństwa ustalenia poruszającego się obiektu za pomocą czujnika sejsmicznego, prawdopodobieństwa poprawnej klasyfikacji rodzaju poruszającego się obiektu oraz prawdopodobieństwa odbioru sygnałów radiowych przez system odbioru i wyświetlania informacji. Artykuł przedstawia dyskretno-ciągły model stochastyczny reakcji systemu alarmowego na przekroczenie strefy kontrolnej przez poruszający się obiekt, w której zainstalowane są trzy czujniki sejsmiczne. Identyfikacja poruszającego się obiektu odbywa się na wyjściu systemu na podstawie zasady większości. Porównano skuteczności systemów alarmowych z wykorzystaniem jednego, dwóch i trzech czujników sejsmicznych w strefie kontrolnej.
    Źródło:
    Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska; 2018, 8, 4; 36-39
    2083-0157
    2391-6761
    Pojawia się w:
    Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Microwave-Induced Delocalization of Excitons in Ternary Compounds of II-VI and III-V Semiconductors
    Autorzy:
    Ivanov, V. Yu.
    Godlewski, M.
    Khachapuridze, A.
    Yatsunenko, S.
    Wojtowicz, T.
    Karczewski, G.
    Bergman, J. P.
    Monemar, B.
    Shamirzaev, T.
    Zhuravlev, K.
    Leonardi, K.
    Hommel, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/2035757.pdf
    Data publikacji:
    2003-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.35.Ji
    72.25.Rb
    76.70.Hb
    78.55.Et
    Opis:
    In this work we employ technique of optically detected cyclotron resonance for evaluation of the role of localization processes in CdTe/CdMnTe and CdMnTe/CdMgTe quantum well structures. From microwave-induced changes of excitonic emissions we evaluate magnitude of potential fluctuations (Stokes shift), correlate optically detected cyclotron resonance results with the results of time-resolved experiments and discuss nature of recombination processes in the limit of a strong localization.
    Źródło:
    Acta Physica Polonica A; 2003, 103, 6; 559-566
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental effectiveness studies of the technology for cleaning the inner cavity of gas gathering pipelines
    Autorzy:
    Volovetskyi, V. B.
    Doroshenko, Ya. V.
    Tarayevs'kyy, O. S.
    Shchyrba, O. M.
    Doroshenko, J. I.
    Stakhmych, Yu. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1818794.pdf
    Data publikacji:
    2021
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    gas
    foam
    gas gathering pipeline
    hydraulic efficiency
    cleaning the inner cavity of pipelines
    gaz
    piana
    rurociąg
    sprawność hydrauliczna
    Opis:
    Purpose: The purposes of the article are to determine the hydraulic efficiency of two gas gathering pipelines of the Yuliivskyi oil and gas condensate production facility (OGCPF) and develop a set of measures to increase it; to experimentally determine the efficiency of using foams to increase the hydraulic characteristics of the gas gathering pipelines in the Yuliivskyi OGCPF; to develop a set of measures that will help to improve the hydraulic characteristics of gas gathering pipelines. Design/methodology/approach: The research methodology consists in determining the hydraulic efficiency of gas gathering pipelines before and after cleaning their inner cavity with foams with different expansion ratios and comparing the obtained values, which allows to objectively assess the efficiency of this cleaning method. The studies were performed within the framework of research and development work by the specialists of the Ukrainian Scientific Research Institute of Natural Gases. Findings: The pilot testing was carried out to determine the efficiency of cleaning the inner cavity of gas gathering pipelines with foams with different expansion ratios. It showed positive results. It was determined that cleaning the inner cavity of gas gathering pipelines with foams with the expansion ratio from 80 to 90 led to an increase in the hydraulic efficiency coefficient by 10.5%, and with foams with the expansion ratio from 50 to 60 - by 5.7%. The measures taken to clean the inner cavity of gas gathering pipelines from liquid contaminations have proven their efficiency and can be recommended for other fields. Research limitations/implications: The obtained results show that it is reasonable to conduct the experimental studies on the efficiency of cleaning the inner cavity of gas gathering pipelines with the foams with higher expansion ratios. To achieve the maximum quality of cleaning the gas gathering pipelines, it is necessary to develop a new method that will combine the use of foam and gel piston.Practical implications: The performed experimental studies help to take a more reasonable approach to cleaning the inner cavity of gas gathering pipelines with foams and to predict in advance the effect of the foam expansion ratio on the hydraulic efficiency of gas gathering pipelines. Originality/value: The experimental studies on the effect of foam expansion ratios on the hydraulic efficiency of gas gathering pipelines are original.
    Źródło:
    Journal of Achievements in Materials and Manufacturing Engineering; 2021, 105, 2; 61--77
    1734-8412
    Pojawia się w:
    Journal of Achievements in Materials and Manufacturing Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of differential serum expression of three factors and pulmonary function in patients with silicosis
    Autorzy:
    Zhu, Ying
    Duan, Xia Yu
    Cheng, Yun Qi
    Yao, Xin Jing
    Xu, Hong
    Zhang, Kui Sheng
    Li, Feng Shi
    Yang, Fang
    Liu, Liang He
    Yuan, Xiang Ju
    Powiązania:
    https://bibliotekanauki.pl/articles/2086531.pdf
    Data publikacji:
    2021-08-05
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    silicosis
    pulmonary function
    early diagnosis
    ROC
    PTPN2
    factor B
    Opis:
    ObjectivesSilicosis is a chronic occupational lung disease. As was previously found by the authors, some proteins increased in the lung tissue of activated rats, and protein tyrosine phosphatase non-receptor type 2 (PTPN2), factor B, and vaccinia-related kinase 1 (VRK1) showed highly differential expressions.Material and MethodsIn this study, serum and bronchoalveolar lavage fluid samples were collected from patients with silicosis and healthy people to verify the expression of PTPN2, factor B, and VRK1. The diagnostic value of differentially expressed proteins for silicosis was judged.ResultsThe expression levels of serum PTPN2, VRK1, and factor B in patients with silicosis were significantly higher than those in the control group (p < 0.01). Higher serum PTPN2 and factor B concentrations significantly and negatively correlated with the ratio of forced expiratory volume in 1 s to forced vital capacity (FEV1/FVC), maximum vital capacity (VCmax), FEV1, and FVC, suggesting that the high expression of PTPN2 and factor B is associated with decreased pulmonary ventilation function and restrictive ventilatory impairment in patients with silicosis. All area under curve (AUC) measurements generated from single detection events were >0.744, with PTPN2 reaching the highest value (0.858). The AUC, sensitivity, and specificity for the combined diagnosis using factor B and PTPN2 were 0.907, 86.91% and 85.07%, respectively, for factor B and PTPN2. The 3 differentially expressed proteins are potential classes of predictive biomarkers for silicosis.ConclusionsRegarding the economy and test practicality, the best diagnostic combination is factor B and PTPN2 for the analysis of AUC, sensitivity and specificity.
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2021, 34, 4; 527-540
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Factors regulating the compositions and distributions of dissolved organic matter in the estuaries of Jiaozhou Bay in North China
    Autorzy:
    Hu, J.
    Zou, L.
    Wang, J.
    Ren, Q.
    Xia, B.
    Yu, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/48070.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    organic matter
    chromophoric dissolved organic matter
    dissolved organic matter
    particulate organic matter
    total carbohydrate
    amino acid
    biogeochemical process
    coastal environment
    chlorophyll a
    North China
    Źródło:
    Oceanologia; 2020, 62, 1
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Radiopurity of $ZnWO_4$ Crystal Scintillators
    Autorzy:
    Belli, P.
    Bernabei, R.
    Cappella, F.
    Cerulli, R.
    Danevich, F.
    Dubovik, A.
    d'Angelo, S.
    Galashov, E.
    Grinyov, B.
    Incicchitti, A.
    Kobychev, V.
    Nagornaya, L.
    Nisi, S.
    Nozzoli, F.
    Poda, D.
    Podviyanuk, R.
    Prosperi, D.
    Shlegel, V.
    Tretyak, V.
    Vasiliev, Ya.
    Vostretsov, Yu.
    Powiązania:
    https://bibliotekanauki.pl/articles/1550381.pdf
    Data publikacji:
    2010-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    29.40.Mc
    23.40.-s
    Opis:
    Recently $ZnWO_4$ was proposed as perspective material for low-counting experiments to search for rare processes. Such experiments demand high radiopurity of $ZnWO_4$ crystal scintillators. With this aim radioactive contamination of large volume (0.1-0.7 kg) $ZnWO_4$ crystal scintillators were measured in the underground Laboratori Nazionali del Gran Sasso of the INFN at the depth of ≈ 3600 m water equivalent.
    Źródło:
    Acta Physica Polonica A; 2010, 117, 1; 139-142
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Потенциал влаги в условиях фазового перехода почвенного раствора в дерново-подзолистой почве
    The moisture potential in conditions of phase transition of soil solution in sod-podzolic soil
    Autorzy:
    Muromcev, N. A.
    Anisimov, A. B.
    Mazhayskiy, Yu. A.
    Semenov, N. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2065506.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Częstochowska
    Tematy:
    atmospheric precipitation
    total evaporation
    moisture potential
    soil temperature
    moisture exchange
    aeration zone
    lowest moisture capacity
    diffusion of moisture
    Opis:
    Установлено новое явление резкого скачкообразного повышения потенциала влаги при переходе положительных значений температуры почв через ноль в область отрицательных величин. Процесс протекает в условиях фазового перехода почвенного раствора при стабильном состоянии всех других параметров среды, за исключением температуры почвы. Понижение потенциала влаги (при постоянной влажности) в условиях повышения температуры объясняется возрастанием подвижности и активности ионов влаги. Понижение температуры обусловливает возрастание потенциала в связи с понижением активности и подвижности ионов воды. Данное явление аналогично снижению содержания влаги в почве. Суточные изменения температуры почвы и потенциала почвенной влаги незначительны и лежат в пределах 0,1÷1,9°С и 2÷3 кПа соответственно.
    A new phenomenon of a sharp jump - like increase of the moisture potential is established in the transition of positive soil temperature values through zero to the region of negative values. The process proceeds under conditions of a phase transition of the soil solution with the stable state of all other soil parameters. The decrease of the moisture potential (at constant humidity) under conditions of temperature increase is explained by the increase in mobility and activity of moisture ions. The decrease in temperature causes an increase in the potential due to a decrease in the activity and mobility of water ions. This phenomenon is similar to reducing the moisture content in soil. Daily changes in soil temperature and soil moisture potential are insignificant and is in the range 0.1÷1.9°C and 2÷3 kPa respectively.
    Źródło:
    Budownictwo o Zoptymalizowanym Potencjale Energetycznym; 2018, 7, 1; 57--66
    2299-8535
    2544-963X
    Pojawia się w:
    Budownictwo o Zoptymalizowanym Potencjale Energetycznym
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparative Analysis of ELV Recycling Policies in the European Union, Japan and China
    Autorzy:
    Yu, Jeongsoo
    Wang, Shuoyao
    B. Serrona, Kevin Roy
    Powiązania:
    https://bibliotekanauki.pl/articles/916995.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    End-of Life Vehicle Recycling
    Extended Producer Responsibility
    Export of Secondhand Vehicle
    Recycling of Next-Generation Vehicle
    Opis:
    This research aims at revealing the current status of the End-of-Life Vehicle (ELV) recycling systems in the European Union (EU), Japan and China which are known to have big vehicle manufacturers. The purpose of this research is to clarify their characteristics and issues, such as existing ELV recycling policy, limitations of Extended Producer Responsibility (EPR) and environmental problems caused by secondhand car export. Japanese ELV recycling system will be analyzed as a specific example. Automakers’ effort to improve ELV recycling rate and the potential influence on recycling policy from large secondhand car export and Next-Generation Vehicle’s (NGV) popularization in Japan will be discussed and generalized. In addition, interview investigation for vehicle makers and government agencies has been conducted to have a comparative analysis of stakeholders’ (mainly automakers) attitude towards current ELV recycling law and future plans which can support Next-Generation Vehicle recycling well, as well as cross-border environmental/international resources recycling problems caused by secondhand car export.
    Źródło:
    Investigationes Linguisticae; 2019, 43; 34-56
    1426-188X
    1733-1757
    Pojawia się w:
    Investigationes Linguisticae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis and evaluation of novel mri contrast agents of chemically modified GD-DTPA complexes with sugars
    Autorzy:
    Sugiyama, M.
    Yamashita, M.
    Yu, G.
    Fujie, M.
    Ogawa, K.
    Ozaki, N.
    Aoki, T.
    Mizuno, S.
    Okada, S.
    Tachi, K.
    Aoshima, K.
    Sankar, U. R.
    Kumar, B. S.
    Takehara, Y.
    Sakahara, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/385252.pdf
    Data publikacji:
    2009
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    MRI contrast agent
    Gd(III)-DTPA
    tumor imaging
    Opis:
    MRI is one of medical diagnostic imaging technologies that can draw the cross section in the body. To obtain a clearer image, Gd complexes are often used as MRI contrast agents. Gd-DTPA (Gd-Diethylenetriaminepentaacetate, Magnevist registered trademark ) is used in particular as the MRI contrast agents. We prepared and evaluated novel MRI contrast agents that were chemically modified Gd-DTPA with sugars (represented as Gd-DTPA-Sugar) via hydrolysis route for providing specificity to target organs and tissues. Gd-DTPASugar complex showed an excellent potential for the MRI contrast agent (r1=31.2 s-1mM-1). Gd-DTPA-Sugar complexes alternatively prepared by shorter synthetic route without protection/ deprotection (hydrolysis) method showed inferior results (r1=6.3 and 8.1 s-1mM-1) to the hydlized product.
    Źródło:
    Journal of Automation Mobile Robotics and Intelligent Systems; 2009, 3, 4; 191-194
    1897-8649
    2080-2145
    Pojawia się w:
    Journal of Automation Mobile Robotics and Intelligent Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Gas hydrates impact on corrosion of the well flow lines material
    Autorzy:
    Poberezhny, L.
    Hrytsanchyk, A.
    Mandryk, O.
    Poberezhna, L.
    Popovych, P.
    Shevchuk, O.
    Mishchuk, B.
    Rudyak, Yu.
    Powiązania:
    https://bibliotekanauki.pl/articles/2175767.pdf
    Data publikacji:
    2021
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    gas hydrate
    oil and gas region
    corrosion-mechanical tests
    influence of hydrate formation
    inner pipe corrosion
    hydraty gazowe
    region ropy i gazu
    badania korozyjno-mechaniczne
    wpływ tworzenia się hydratów
    korozja rur wewnętrznych
    Opis:
    Purpose: Determination of regularities of joint action of mechanical stresses, formation water and hydrate formation on corrosion of material of flow pipelines. Design/methodology/approach: According to the analysis of reservoir water of the investigated deposits, it was found that the main corrosive component is soluble chlorides. Proposed for corrosion and corrosion-mechanical tests of 6 model environments. An estimation of the influence of stress concentration, depending on the defects of the inner wall of the pipe, was carried out, and the nominal local stresses in the pipeline was carried. Findings: The basic regularities of influence of stress and hydration formation on corrosion and localization of corrosion processes and on the kinetics of deformation of samples are described. For samples made of steel 20 and 17GS, an increase in the velocity of general and local corrosion for samples sustained in the gas hydrate was observed compared to the control results obtained, the coefficient of influence of the gas hydrate on corrosion was calculated. Research limitations/implications: The obtained results are valid for thermobaric operating conditions of well flow lines. Practical implications: The data obtained in the work on the patterns of corrosion processes and the impact of hydrate formation on them will allow to identify potentially dangerous areas of flow lines and prevent emergencies. Originality/value: Based on the analysis of the geometric dimensions of the defects, the effective stress concentration coefficients are calculated, and it is shown that the stresses in the vicinity of corrosion defects in normal operating modes range from 164 to 545 MPa.
    Źródło:
    Archives of Materials Science and Engineering; 2021, 110, 1; 5--17
    1897-2764
    Pojawia się w:
    Archives of Materials Science and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Abundance and community structure of ammonia oxidizing archaea and bacteria in response to peanut growth under controlled condition in Shandong, China
    Autorzy:
    Huang, C.
    Xu, N.
    Fu, Z.
    Sun, B.
    You, S.
    Ma, D.
    Yu, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/12689395.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Tematy:
    China
    plant cultivation
    peanut
    Arachis hypogaea
    plant growth
    community structure
    microorganism abundance
    ammonia-oxidizing bacteria
    ammonia-oxidizing archaea
    field experiment
    three-year field experiment
    controlled condition
    Opis:
    Based on a three-year field experiment under controlled condition in Ji’nan, China, the effects of peanut growth on the variation in the abundance and community structure of ammonia oxidizing bacteria (AOB) and archaea (AOA) before and after peanut growth were investigated through quantitative PCR and cluster analysis of terminal-restriction fragment length polymorphism. Our results show that the community composition of AOA and AOB was greatly affected by the peanut growth leading to the decreased abundance of AOA and increased abundance of AOB. Furthermore, AOA and AOB community structures varied before and after peanut growth. Phylogenetic analysis indicated that all AOA and AOB community sequences were clustered into the uncultured group. Altogether, the results suggested that the abundance of AOA and AOB in soil and their community compositions can be greatly affected by the peanut growth.
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2019, 18, 6; 119-127
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modelʹ teplovogo sostoâniâ požarnogo v zaŝitnoj odežde
    A Model of a Firefighter’s Thermal Condition when Attired in Protective Clothing
    Model stanu cieplnego ciała strażaka w ubraniu ochronnym
    Autorzy:
    Bolibrukh, B. V.
    Chmiel, M.
    Mazur, Yu.
    Powiązania:
    https://bibliotekanauki.pl/articles/372784.pdf
    Data publikacji:
    2016
    Wydawca:
    Centrum Naukowo-Badawcze Ochrony Przeciwpożarowej im. Józefa Tuliszkowskiego
    Tematy:
    safety at work
    thermal condition of a firefighter’s body dressed in heat protective clothing
    modelling
    experimental research
    ochrona pracy
    stan cieplny ciała strażaka w ubraniu chroniącym przed ciepłem
    modelowanie
    badanie eksperymentalne
    Opis:
    Aim: The purpose of this study is to develop and verify a mathematical model, which identifies the thermal condition of a firefighter whilst wearing heat protective clothing at different temperature levels. The model is intended for predicting and analyzing the thermal condition of the body and determination of a firefighter’s maximum operating endurance. Introduction: The work of a firefighter is accompanied by considerable risk to health and life. Effects from heat and physical exertion often reach critical limits of human endurance. Similarly, materials used in protective clothing may become ineffective beyond certain parameters. Consequently, exposure beyond such parameters leads to overheating of the body and causes burns. In order to increase the firefighter’s operational safety, it is important to know endurance limits for specified operating conditions, within which a firefighter is expected to perform and not exceed such limits. The time constraint is dependent on a range of factors, such as: characteristics of heat protective clothing (amount, type of material used and thickness of layers), temperature, humidity, speed of airflow surrounding the clothing and work load. Methods: The simultaneous modelling of a firefighter’s body temperature and clothing intended to protect from the effects of heat, allows for an evaluation of many aspects relating to the work of a firefighter and factors which influence the thermal condition of his/her body. This kind of modelling facilitates the determination of a firefighter’s maximum performance duration in given circumstances and to develop a configuration of new clothing providing protection against the effect of heat. Simultaneously, it is possible to analyze comfort levels and parameter limits for human body temperatures, which on average range within 37,2-38°C. Additionally, modelling will enable a reduction in the number of expensive tests for textile content of protective clothing, performed for different environmental conditions and nature of work of a firefighter during operations. Results: Reported study results relating to temperature levels in spaces beneath layers of protective clothing for volunteers taking part in research, who performed physical exercises of varying intensity, were utilised to verify the proposed model. Body temperature test results, for volunteers attired in protective clothing and engaged in physical activity at room temperature of varying degrees, were very close to the results obtained from model calculations. Variations did not exceed 2°C. Conclusion: The study facilitated the development of a two dimension model revealing the heat exchange in protection clothing, taking into account thermal processes and thermoregulation mechanisms of the human body, at different physical exertion levels, including internal heat release, permeability of textiles, and heat dissipation through breathing and perspiration.
    Wprowadzenie: Gaszenie pożarów wiąże się z dużym ryzykiem dla życia i zdrowia strażaków. Temperatura i obciążenie fizyczne, które oddziałują na strażaków osiągają często wartości krytyczne dla organizmu człowieka oraz materiałów, z których wykonane jest ubranie chroniące przed wpływem ciepła. Przekroczenie tych wartości doprowadza do przegrzania ciała lub poparzeń. Aby zwiększyć bezpieczeństwo pracy strażaków, należy znać granice czasowe, w jakich strażak może pracować w określonych warunkach podczas gaszenia pożaru i nie dopuszczać do ich przekroczenia. Maksymalny czas zależy od czynników takich jak: charakterystyka ubrania chroniącego przez oddziaływaniem ciepła (liczba, materiał i grubość warstw), temperatura, wilgotność i prędkość owiewu ubrania przez otaczające powietrze oraz poziom obciążenia. Cel: Celem artykułu jest opracowanie i weryfikacja modelu obliczeniowego stanu cieplnego ciała strażaka w ubraniu chroniącym przez oddziaływaniem ciepła w różnych warunkach termicznych. Model posłuży dla prognozowania i analizy stanu cieplnego oraz określenia maksymalnego/granicznego czasu pracy strażaka. Metody: Jednoczesne modelowanie stanu cieplnego ciała strażaka oraz ubrania chroniącego przed oddziaływaniem ciepła pozwoli na przeanalizowanie wielu warunków pracy strażaka, oraz czynników wpływających na stan cieplny jego organizmu. Tego rodzaju modelowanie pozwala określać maksymalną długość pracy strażaka w danych warunkach oraz opracować konfigurację nowego ubrania chroniącego przed oddziaływaniem ciepła. Jednocześnie można będzie analizować poziom komfortowych i granicznych temperatur ciała człowieka, które wynoszą średnio 37,2-38°С. Modelowanie pozwoli również ograniczyć liczbę drogich badań w warunkach rzeczywistych nad materiałami odzieży ochronnej, przeprowadzanych dla różnych warunków środowiskowych i charakteru pracy strażaka podczas gaszenia pożaru. Wyniki: Przedstawione wyniki badań eksperymentalnych stanu cieplnego w przestrzeni pod ubraniem ochotników uczestniczących w badaniach, wykonujących ćwiczenia fizyczne o zróżnicowanym natężeniu, zostały wykorzystane do zweryfikowania prezentowanego modelu. Wyniki uzyskane podczas eksperymentalnych pomiarów temperatury ciała ochotników ubranych w odzież ochronną i wykonujących prace w temperaturze pokojowej o różnym stopniu natężenia były bardzo zbliżone do wyników obliczeń modelowych. Różnice nie wynosiły więcej niż 2°С. Wnioski: Efektem prac jest opracowany dwumiarowy model wymiany ciepła w ubraniu ochronnym, uwzględniający procesy termiczne i mechanizmy termoregulacji przy różnych poziomach obciążenia fizycznego, w tym wewnętrzne wydzielanie ciepła, zmienną przepuszczalność tkanin, odprowadzanie ciepła przez wydzielanie potu i oddychanie.
    Źródło:
    Bezpieczeństwo i Technika Pożarnicza; 2016, 41, 1; 37-46
    1895-8443
    Pojawia się w:
    Bezpieczeństwo i Technika Pożarnicza
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characterization of serum adiponectin and leptin in healthy perinatal dairy cows or cows with ketosis, and their effectson ketosis involved indices
    Autorzy:
    Shen, L.
    Qian, B.
    Xiao, J.
    Zhu, Y.
    Hussain, S.
    Deng, J.
    Peng, G.
    Zuo, Z.
    Zou, L.
    Yu, S.
    Ma, X.
    Zhong, Z.
    Ren, Z.
    Wang, Y.
    Liu, H.
    Zhou, Z.
    Cai, D.
    Hu, Y.
    Zong, X.
    Cao, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087289.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    adiponectin
    dairy cows
    ketosis
    leptin
    perinatal period
    Źródło:
    Polish Journal of Veterinary Sciences; 2020, 23, 3; 373-381
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of the effectiveness of the new inhibitor in different aggressive media
    Badanie skuteczności nowego inhibitora w różnych środowiskach o dużej aktywności chemicznej
    Autorzy:
    Gurbanov, Huseyn R.
    Talybov, Gulahmad M.
    Adygezalova, Mehpara B.
    Zhang, Yu X.
    Powiązania:
    https://bibliotekanauki.pl/articles/31343889.pdf
    Data publikacji:
    2023
    Wydawca:
    Instytut Nafty i Gazu - Państwowy Instytut Badawczy
    Tematy:
    carbon dioxide
    hydrogen sulfide
    corrosion
    protective effect
    inhibitor
    pH
    reagent
    corrosion rate
    concentration
    dwutlenek węgla
    siarkowodór
    korozja
    działanie ochronne
    odczynnik
    tempo korozji
    stężenie
    Opis:
    The corrosion protection effect of the new S-1 reagent in media with the pH values of 2.0, 4.0, 6.0, as well as carbon dioxide and hydrogen sulfide added separately and combined to the mentioned media, was first tested under laboratory conditions. The protective effect of reagent S-1 was weak in the corrosion medium without hydrogen sulfide and carbon dioxide. However, as the acidity of the medium and the concentration of the reagent increases, the corrosion protection efficiency of the inhibitor also increases. The highest effect is observed at pH = 2.0 and reagent concentration of 30 mg/l. The corrosion protection effect of the reagent reaches 97% under these conditions. In the media with pH = 4.0 and pH = 6.0 without carbon dioxide and hydrogen sulfide, the protective effect of the inhibitor at the optimal concentration of 30 mg/l is 66% and 64%, respectively. In the medium with added carbon dioxide, the protective effect of inhibitor S-1 decreases at pH = 2.0 and, on the contrary, increases at the values of pH = 4.0 and pH = 6.0. Also, as the pressure of carbon dioxide in the medium increases, the protective effect of inhibitor S-1 increases. When hydrogen sulfide is added to the medium, it causes an increase in the corrosion rate and the protection efficiency of inhibitor S-1. However, in the medium without inhibitor, the increase of hydrogen sulfide concentration only up to CH2S = 400 mg/l is accompanied by an increase in the corrosion rate at all values of pH. The addition of 1000 mg/l of hydrogen sulfide to the corrosion medium leads to the decrease in the corrosion rate in the medium without inhibitors and a slight decrease in the protective effect at the concentration of the inhibitor Cinh = 10 mg/l. As the concentration of inhibitor S-1 increases in the medium with the addition of carbon dioxide and hydrogen, its corrosion protection effect also increases. In the range of Cinh = 10–30 mg/l, when PCO2 = 0.5 atm and CH2S = 200 mg/l, the protective effect is estimated at 38–99%, and when CH2S = 1000 mg/l, it is estimated at 17–79%. At PCO2 = 1.0 atm, the value of protective effect is 22–95% and 14–76%, and finally at PCO2 = 2.0 atm, the value of the corrosion protection effect of inhibitor S-1 is estimated at 44–92% and 15–75%, respectively. The coexistence of carbon dioxide and hydrogen sulfide in an aggressive medium leads to an increase in the protective effect of inhibitor S-1 compared to the medium containing only carbon dioxide, and reduces it in comparison to the medium with hydrogen sulfide. An increase in carbon dioxide pressure in the presence of hydrogen sulfide causes a decrease in the protective effect of inhibitor S-1. The protective effect of inhibitor S-1 is lower in the medium with hydrogen sulfide concentration of 1000 mg/l compared to a concentration of 200 mg/l. This case is also observed in the carbon dioxide free medium.
    Działanie antykorozyjne nowego odczynnika S-1 w agresywnych mediach o pH 2,0; 4,0; 6,0, a także dwutlenku węgla i siarkowodoru dodawanych osobno lub łącznie do tych mediów, zostało najpierw zbadane w warunkach laboratoryjnych. Działanie ochronne odczynnika S-1 było słabe w środowisku korozyjnym bez siarkowodoru i dwutlenku węgla. Jednak wraz ze wzrostem kwasowości medium i stężenia odczynnika wzrasta również skuteczność inhibitora w ochronie przed korozją. Najlepsze działanie antykorozyjne odnotowano przy wartości pH = 2,0 i stężeniu odczynnika 30 mg/l. Skuteczność ochronna odczynnika wynosi wówczas 97%. W medium o pH = 4,0 i pH = 6,0 bez dwutlenku węgla i siarkowodoru skuteczność ochronna inhibitora przy optymalnym stężeniu 30 mg/l wynosi odpowiednio 66 i 64%. W medium z dodatkiem dwutlenku węgla działanie ochronne inhibitora S-1 maleje przy wartości pH = 2,0 i odwrotnie wzrasta przy wartościach pH = 4,0 i pH = 6,0. Ponadto, wraz ze wzrostem ciśnienia dwutlenku węgla w środowisku wzrasta skuteczność ochronna inhibitora S-1. Dodanie siarkowodoru do medium powoduje wzrost tempa korozji i skuteczności ochronnej inhibitora S-1. Jednak w medium bez inhibitora wzrostowi stężenia siarkowodoru nawet do tak niskiej wartości jak CH2S = 400 mg/l towarzyszy wzrost tempa korozji przy wszystkich wartościach pH. Dodanie 1000 mg/l siarkowodoru do medium korozyjnego prowadzi do zmniejszenia tempa korozji w medium bez inhibitorów i nieznacznego zmniejszenia działania ochronnego przy stężeniu inhibitora Cinh = 10 mg/l. Wraz ze wzrostem stężenia inhibitora S-1 w medium z dodatkiem dwutlenku węgla i siarkowodoru, zwiększa się również jego działanie antykorozyjne. W zakresie Cinh = 10–30 mg/l, gdy PCO2 = 0,5 atm i CH2S = 200 mg/l, skuteczność ochronną szacuje się na 38–99%, natomiast przy CH2S = 1000 mg/l na 17–79%. Dla PCO2 = 1,0 atm skuteczność ochronna wynosi od 22–95% do 14–76%, a przy PCO2 = 2,0 atm skuteczność antykorozyjną inhibitora S-1 szacuje się odpowiednio na 44–92% i 15–75%. Jednoczesne występowanie dwutlenku węgla i siarkowodoru w agresywnym medium zwiększa skuteczność ochronną inhibitora S-1 w stosunku do medium zawierającego tylko dwutlenek węgla i zmniejsza ją w porównaniu do medium z siarkowodorem. Wzrost ciśnienia dwutlenku węgla w obecności siarkowodoru powoduje zmniejszenie skuteczności ochronnej inhibitora S-1. Ulega ona także zmniejszeniu w środowisku o stężeniu siarkowodoru 1000 mg/l w porównaniu do stężenia 200 mg/l. Ten przypadek obserwuje się również w środowisku bez dodatku dwutlenku węgla.
    Źródło:
    Nafta-Gaz; 2023, 79, 7; 478-483
    0867-8871
    Pojawia się w:
    Nafta-Gaz
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-73 z 73

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