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Wyświetlanie 1-15 z 113
Tytuł:
The p-semisimple property for some generalizations of BCI algebras and its applications
Autorzy:
Obojska, Lidia
Walendziak, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/1791758.pdf
Data publikacji:
2020-01-30
Wydawca:
Uniwersytet Pedagogiczny im. Komisji Edukacji Narodowej w Krakowie
Tematy:
RM/tRM/*RM/RM**/*aRM/BCI/BCH/BZ/pre-BZ/pre-BCI algebras
p-semisimplicity
mereology
antisymmetry
Opis:
This paper presents some generalizations of BCI algebras (the RM, tRM, *RM, RM**, *RM**, aRM**, *aRM**, BCH**, BZ, pre-BZ and pre-BCI algebras). We investigate the p-semisimple property for algebras mentioned above; give some examples and display various conditions equivalent to p-semisimplicity. Finally, we present a model of mereology without antisymmetry (NAM) which could represent a tRM algebra.
Źródło:
Annales Universitatis Paedagogicae Cracoviensis. Studia Mathematica; 2020, 19; 79-94
2300-133X
Pojawia się w:
Annales Universitatis Paedagogicae Cracoviensis. Studia Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anatomia diagnostyczna i diagnostyka patologii strefy entezy pierścienia rotatorów
Diagnostic anatomy and diagnostics of enthesal pathologies of the rotator cuff
Autorzy:
Czyrny, Zbigniew
Powiązania:
https://bibliotekanauki.pl/articles/1061620.pdf
Data publikacji:
2012
Wydawca:
Medical Communications
Tematy:
MRI
RM
US
USG
anatomy
enthesopathy
rotator cuff
rm
us
usg
anatomia
entezopatia
pierścień rotatorów
Opis:
Detailed anatomy, crucial in modern high-definition diagnostics imaging, is a base for understanding diagnostic images and the nature of the diagnosed disease. The aim of this paper is presentation of a new anatomical model of the rotator cuff, which includes definition of tendinous and capsule-ligamentous layers as equally important to rotator cuff function understanding. Schematic and diagnostic (ultrasonography, magnetic resonance imaging) anatomy of the rotator cuff based on the core tendon concept is presented. Appropriate tissue layers of the cuff are discussed in detail. In the diagnostics part some enthesal pathologies of the rotator cuff are presented. Material and methods: New anatomical data was analyzed in the context of rotator cuff layers – their presence, thickness and structure observed on magnetic resonance imaging and ultrasonographic images. Conclusions: Rotator cuff should be regarded as a multilayer structure consisting of fused fibers of tendons and capsuloligamentous complex. The thickness of these layers is comparable therefore it is important to realize that capsular pathologies may become a serious obstacle to normal shoulder joint function. Understanding of anatomical rotator cuff layers explains the formation of calcific cavities within the rotator cuff. In fact between layers of the cuff. Calcific cavities are a sequelae of chronic enthesopathy/enthesal tear with hydroxyapatite filling and probably delaminating the tendinous layer from the capsuloligamentous one.
Anatomia szczegółowa, jakiej wymaga nowoczesna diagnostyka obrazowa, jest podstawą zrozumienia obrazów diagnostycznych oraz natury diagnozowanej choroby. Celem pracy jest przedstawienie nowego modelu anatomicznego struktur mięśniowo-ścięgnistych i torebkowo-więzadłowych o kompleksowej nazwie pierścień rotatorów, na podstawie schematów anatomicznych i anatomii diagnostycznej (ultrasonografia i rezonans magnetyczny) pierścienia z zastosowaniem koncepcji rdzeni ścięgnistych. Omawiane są odpowiednie warstwy tkankowe pierścienia rotatorów. W części diagnostycznej przedstawiono niektóre patologie entezy ramiennej pierścienia rotatorów. Materiał i metoda: Przeanalizowano najnowsze dane z badań anatomicznych struktury warstw pierścienia rotatorów – ich lokalizację, wymiary i strukturę w badaniach ultrasonograficznym i rezonansu magnetycznego. Wnioski: Pierścień rotatorów powinien być rozpatrywany jako wielowarstwowa struktura składająca się z przeplatających się i zespalających ze sobą włókien ścięgien i kompleksu torebkowo-więzadłowego spełniających różne funkcje statyczno- dynamiczne. Grubość tych warstw jest porównywalna, stąd duże znaczenie ma świadomość, że patologie kompleksu torebkowo-więzadłowego mogą stać się poważną przeszkodą w prawidłowym funkcjonowaniu stawu ramiennego, mając istotny wpływ na zachowanie się całego pierścienia rotatorów. Zrozumienie anatomii i funkcji warstw pierścienia rotatorów wyjaśnia część zagadki tworzenia się hydroksyapatytowych jam wapiennych pomiędzy warstwami ścięgien/kompleksu. Jamy te są konsekwencją uszkodzeń entezy pierścienia rotatorów na granicy przyczepu warstwy ścięgnistej i torebkowo- więzadłowej. Takie uszkodzenie entezy otwiera drogę do wypełniania już istniejących rozwarstwień ścięgna-kompleksu oraz aktywnego ich rozlaminowywania poprzez ciągłe wypełnianie materiałem wapiennym.
Źródło:
Journal of Ultrasonography; 2012, 12, 49; 178-187
2451-070X
Pojawia się w:
Journal of Ultrasonography
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
High Order Harmonic Generation and Atomic Stabilization in Ultra-Intense Laser Pulses
Autorzy:
Maquet, A.
Millack, T.
Véniard, V.
Powiązania:
https://bibliotekanauki.pl/articles/1931517.pdf
Data publikacji:
1994-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.65.Ky
32.80.Rm
Opis:
We present results of recent numerical simulations on the non-linear response of a single-electron atom submitted to an intense laser pulse. We address both the questions of the light scattered by the atom and the possible stabilization against ionization. One of the results of our simulations is the the presence of hyper-Raman lines in the high-order harmonic spectra. We suggest that these lines could be a signature of atomic stabilization.
Źródło:
Acta Physica Polonica A; 1994, 86, 1; 191-199
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hyperfine Structure Constants in the 10$\text{}^{2}$D$\text{}_{3}\text{}_{/}\text{}_{2}$ and 11$\text{}^{2}$D$\text{}_{3}\text{}_{/}\text{}_{2}$ States of $\text{}^{85}$Rb
Autorzy:
Głódź, M.
Kraińska-Miszczak, M.
Powiązania:
https://bibliotekanauki.pl/articles/1928264.pdf
Data publikacji:
1993-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
35.10.Fk
32.80.Rm
Opis:
The magnetic-dipole interaction constants A and the electric-quadrupole interaction constants B of two n$\text{}^{2}$D$\text{}_{3}\text{}_{/}\text{}_{2}$ states of $\text{}^{85}$Rb were measured by the quantum beat method. The results are - for n = 10: |A| = 0.393(8) MHz, |B| = 0.141(13) MHz, for n = 11: |A| = 0.283(6) MHz, |B| = 0.100(11) MHz, and positive ratio B/A for both states.
Źródło:
Acta Physica Polonica A; 1993, 83, 2; 161-165
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An Attempt to Produce the Implanted $\text{}^{22}$Na Source for Positron Spectrometry
Autorzy:
Latuszyński, A.
Yushkevich, Yu. V.
Bystrov, V. A.
Misak, R.
Wawryszczuk, J.
Goworek, T.
Powiązania:
https://bibliotekanauki.pl/articles/1929102.pdf
Data publikacji:
1993-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
28.60.+s
29.25.Rm
Opis:
Preliminary results of $\text{}^{22}$Na implantation into the metal foils in order to produce the positron source for annihilation experiments are presented.
Źródło:
Acta Physica Polonica A; 1993, 83, 3; 345-348
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kinetic Energies in the Direct Double Photoionization of Helium and the Electron-Electron Correlation
Autorzy:
Bauer, J.
Powiązania:
https://bibliotekanauki.pl/articles/2013247.pdf
Data publikacji:
2000-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
32.80.Rm
33.80.Rv
Opis:
We present a simple model describing kinetic energy probability distributions of outgoing electrons in the direct double photoionization of helium. The model applies to photons of energy greater than the binding energy of the atom and to radiation intensities extending from perturbation regime to the strong-field one. It appears that the shape of probability distribution is mainly determined by the electron-electron correlation in their final state. For nonperturbative intensities the distribution depends strongly on polarization of incident radiation.
Źródło:
Acta Physica Polonica A; 2000, 97, 4; 629-637
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Liquid Phase Contained in Porous Rock as Observed by Proton Magnetic Relaxation
Autorzy:
Harańczyk, H.
Wójcik, A.
Powiązania:
https://bibliotekanauki.pl/articles/2014116.pdf
Data publikacji:
2000-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
76.60.Es
81.05.Rm
Opis:
High power proton relaxometry was applied to investigate the liquid phase contained in porous rock. Proton free induction decays and spin-lattice relaxation times allowed us to investigate the pore distribution and the contribution of mobile and of immobilized liquid. The differences in pore distributions in oil-containing limestone and in Węglowicki sandstone were found. The fractal exponent for pore distribution in Węglowicki sandstone was fitted using both stretched exponential and modified stretched exponential models. The results of both approaches are compared.
Źródło:
Acta Physica Polonica A; 2000, 98, 1-2; 153-161
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Usage of Perlitic Pumice from İzmir-Menderes (Turkey) in the Production of Low-Strength Lightweight Concrete
Autorzy:
Ceylan, H.
Saraç, S.
Powiązania:
https://bibliotekanauki.pl/articles/1031438.pdf
Data publikacji:
2017-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.05.Rm
81.05.-t
Opis:
Lightweight aggregates, used to produce cavity blocks in the construction sector, vary according to their technical properties and thus, technical analyses should be performed on lightweight aggregate specimens. Lightweight aggregates, like pumice, are widely employed for the production of construction elements, used as light masonry units. In literature there are studies related to applications of various lightweight aggregates, such as volcanic slag, ignimbrite and expanded clay, in addition to pumice, to produce porous cavity blocks. This study investigates the usability of perlitic pumice formations, present around Menderes, İzmir (Turkey), as lightweight aggregate. Many experiments were conducted to investigate this possibility and to determine the optimum mixing ratios of aggregate. Based on the results, for 10% of cement by volume, the optimum aggregate mixing ratio was 40% 0-4 mm and 60% 4-8 mm.
Źródło:
Acta Physica Polonica A; 2017, 132, 3; 667-669
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Direct and Postsynthetic Functionalization of Mesoporous B-SBA-15-SO₃H Acid Catalyst and Application to Methyl Propionate Esterification
Autorzy:
Erdem, B.
Azko, Ç.
Erdem, S.
Öksüzoğlu, R.
Powiązania:
https://bibliotekanauki.pl/articles/1031507.pdf
Data publikacji:
2017-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.05.Rm
82.33.Ln
Opis:
Organic functionality can be added to mesoporous silicates in two ways: either by covalent grafting (postsynthetic) of various functional groups onto the channel walls or by incorporating functionalities directly during the synthesis (one-pot). If the grafted catalytically active groups experience similar environments and are isolated from each other, catalysis process is greatly facilitated. For this purpose, boric acid, as boron source, was added into the initial reaction mixture and then acid functionalization was performed by post and direct method. The obtained acid catalysts were tested in the esterification of propionic acid with methanol and the activity of these new materials was compared to that of SBA-15-SO₃H. Boron addition has facilitated the methyl propionate esterification for both postsynthetic and direct functionalized acid catalyst. Boron incorporated and postsynthetic functionalized mesoporous acid catalyst has highly enhanced the esterification reaction, compared to direct functionalized acid catalyst. The post functionalization method seems to be superior to one-pot functionalization method for preparation of mesoporous acid catalysts.
Źródło:
Acta Physica Polonica A; 2017, 132, 3; 756-759
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vacancy Transfer Probabilities from K to L Shell for Low Atomic Number Elements at 5.96 keV
Autorzy:
Ertuğral, B.
Baltaş, H.
Çelik, A.
Kobya, Y.
Powiązania:
https://bibliotekanauki.pl/articles/1537681.pdf
Data publikacji:
2010-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
32.80.-t
33.20.Rm
Opis:
Vacancy transfer probabilities from K to L shell were measured using $I_{Kβ}//I_{Kα}$ intensity ratios for six elements in the atomic region 16 ≤ Z ≤ 22. The K X-rays from the targets excited by 5.96 keV (1.85 GBq $\text{}^{55}Fe$ filtered annular source) incident photon were obtained using a high resolution PGT model Si(Li) detector. Theoretical values were calculated using radiative and radiationless transition rates of these elements. The measured values of $η_{KL}$ were compared with the theoretical ones. Reasonable agreement was typically obtained between present and theoretical values.
Źródło:
Acta Physica Polonica A; 2010, 117, 6; 900-903
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Temperature and Impregnation Ratio of $H_3PO_4$ on the Production of Activated Carbon from Hazelnut Shell
Autorzy:
Örkün, Y.
Karatepe, N.
Yavuz, R.
Powiązania:
https://bibliotekanauki.pl/articles/1491485.pdf
Data publikacji:
2012-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.05.Rm
81.05.U-
Opis:
Hazelnut shell was used as a precursor in the production of activated carbon by chemical activation with $H_3PO_4$ since there is a huge volume of such a solid waste resulting from the hazelnut production in eastern Black Sea region of Turkey. Effects of final activation temperature, time and $H_3PO_4$ concentration used in the impregnation stage on the porous development were investigated. Activation at low temperature represented that micropores were developed first and then mesoporosity developed, enhanced up to 400C and then started to decrease due to possible shrinking of pores. The optimum temperature for hazelnut shell was found to be around 400C on the basis of total pore volume and the Brunauer-Emmett-Teller surface area. It was clearly demonstrated that $H_3PO_4$ concentration used in the impregnation stage was not only effective for development of surface area and pore volumes but also an effective tool for tailoring the pore structure and size distribution.
Źródło:
Acta Physica Polonica A; 2012, 121, 1; 277-280
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Spatial Region of Photoionization in a Strong Laser Field
Autorzy:
Bauer, J.
Powiązania:
https://bibliotekanauki.pl/articles/1812038.pdf
Data publikacji:
2008-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
32.80.Rm
42.50.Hz
Opis:
In the framework of the Keldysh-Faisal-Reiss theory in the velocity gauge we investigate the magnitude of the space region, where photoionization in a strong laser field takes place. We find substantial differences between the short-range and the long-range (Coulomb) potentials, and between linear and circular polarizations of incident radiation. It appears that only for the initial state in the Coulomb potential the region of space, where ionization is held, expands significantly with increasing intensity for a typical optical frequency and non-relativistic but strong circularly polarized laser field. As a result of our considerations, we suggest to modify the idea of Reiss and Krainov of a certain simple Coulomb correction to the Volkov wave function. We show that photoionization rate calculated for the H(1s) atom, using our approach, is in better agreement with other theoretical results for moderately strong circularly polarized laser field.
Źródło:
Acta Physica Polonica A; 2008, 114, 4; 739-750
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Phase Transition in Quasi-Two-Dimensional Horizontally Driven Granular System
Autorzy:
Shah, S.
Li, Y.
Khan, W.
Din, N.
Chand, R.
Powiązania:
https://bibliotekanauki.pl/articles/1489921.pdf
Data publikacji:
2012-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.05.Rm
64.60.-i
Opis:
In an experimental setup, consisting of quasi-two-dimensional square cell, the motion of monodisperse spherical steel balls is studied. The cell is vibrated horizontally to eradicate the compaction of balls due to gravity. By raising the number density of the steel balls, the dilute fluid has been gradually alternated into dense fluid. The temperature of granular media, along the driven and transverse directions, has been found to be anisotropic. Transition from granular gas to the liquid-like fluid has been observed. The radial distribution function of the balls in the cell is investigated for the authentication of the structural changes. Furthermore, the fast Fourier transformation for the 2D system is carried out to confirm these changes.
Źródło:
Acta Physica Polonica A; 2012, 121, 3; 699-702
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fractional Revival of Rydberg Wave Packets in Twice-Kicked One-Dimensional Atoms
Autorzy:
Chatterjee, S.
Saha, A.
Talukdar, B.
Powiązania:
https://bibliotekanauki.pl/articles/1493574.pdf
Data publikacji:
2011-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
32.80.Rm
03.65.Wj
Opis:
We study revival and fractional revival phenomena of wave packets in a one-dimensional Rydberg atom irradiated by two time-delayed half-cycle pulses using an autocorrelation function characterized by electronic transition probabilities as weighting factors rather than modeling them by a Gaussian or Lorentzian distribution. If the momentum $(q_2)$ delivered to the atom by the second kick is much smaller than that $(q_1)$ imparted by the first one, the times of revival and fractional revival coincide with those of the single kicked atom. For $q_2$ ≥ $q_{1}//4$ appearance of revival and fractional revival depends on both the values of $q_2$ and time delay $t_1$ between the pulses but more sensitively on $t_1$. The number of fractional revivals tends to become numerous as the value of $t_1$ increases.
Źródło:
Acta Physica Polonica A; 2011, 120, 3; 438-442
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Laser-Matter Interaction with Intense Short Laser Pulses
Autorzy:
Lompré, L. A.
Powiązania:
https://bibliotekanauki.pl/articles/1931493.pdf
Data publikacji:
1994-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
32.80.Fb
32.80.Rm
Opis:
Laser-matter interaction in rare gases (He, Ne, Ar and Xe) has been investigated using a 1 ps Nd-glass laser pulse at 1053 nm with intensities between 10$\text{}^{13}$ to 10$\text{}^{18}$ W/cm$\text{}^{2}$. Three aspects of the interaction have been studied: the creation of multiply charged ions, the energy of the ejected electron and the propagation in an underdense plasma. At the maximum laser intensity, all electrons of the outer shell are removed, except in Ne for which charge states up to 7+ are observed. Comparison of experimental data with Ammosov et al. tunneling model shows a very good agreement, indicating that ionization with a 1 ps pulse in the near infrared light mainly occurs in tunneling regime. Electrons created in a low-density medium with energies up to 5 keV have been detected. These energies are far above the energy acquired during the ionization process, indicating that at high laser intensities electron energy is governed by ponderomotive force. Finally, the study of the propagation of an intense laser pulse in an underdense plasma shows that it is not possible to obtain simultaneously high laser intensity (10$\text{}^{17}$-10$\text{}^{18}$ W/cm$\text{}^{2}$) and high electron density (10$\text{}^{19}$-10$\text{}^{20}$ cm$\text{}^{-3}$). Best conditions for solving this problem will be discussed.
Źródło:
Acta Physica Polonica A; 1994, 86, 1; 135-150
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 113

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