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    Wyświetlanie 1-22 z 22
    Tytuł:
    Computing Generalized Inverse Systems Using Matrix Pencil Methods
    Autorzy:
    Varga, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/908054.pdf
    Data publikacji:
    2001
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    macierz
    metody numeryczne
    system inversion
    rational matrices
    descriptor systems
    numerical methods
    Opis:
    We address the numerically reliable computation of generalized inverses of rational matrices in descriptor state-space representation. We put particular emphasis on two classes of inverses: the weak generalized inverse and the Moore-Penrose pseudoinverse. By combining the underlying computational techniques, other types of inverses of rational matrices can be computed as well. The main computational ingredient to determine generalized inverses is the orthogonal reduction of the system matrix pencil to appropriate Kronecker-like forms.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2001, 11, 5; 1055-1068
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Detection and identification of loss of efficiency faults of flight actuators
    Autorzy:
    Ossmann, D.
    Varga, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/330772.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    aerospace engineering
    fault detection
    fault diagnosis
    loss of efficiency type of faults
    flight actuator faults
    inżynieria lotnicza
    detekcja uszkodzeń
    diagnostyka uszkodzeń
    Opis:
    We propose linear parameter-varying (LPV) model-based approaches to the synthesis of robust fault detection and diagnosis (FDD) systems for loss of efficiency (LOE) faults of flight actuators. The proposed methods are applicable to several types of parametric (or multiplicative) LOE faults such as actuator disconnection, surface damage, actuator power loss or stall loads. For the detection of these parametric faults, advanced LPV-model detection techniques are proposed, which implicitly provide fault identification information. Fast detection of intermittent stall loads (seen as nuisances, rather than faults) is important in enhancing the performance of various fault detection schemes dealing with large input signals. For this case, a dedicated fast identification algorithm is devised. The developed FDD systems are tested on a nonlinear actuator model which is implemented in a full nonlinear aircraft simulation model. This enables the validation of the FDD system’s detection and identification characteristics under realistic conditions.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2015, 25, 1; 53-63
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nontrivial solutions of linear functional equations: methods and examples
    Autorzy:
    Varga, A.
    Vincze, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/255015.pdf
    Data publikacji:
    2015
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    linear functional equations
    spectral analysis
    field homomorphisms
    Opis:
    For a wide class of linear functional equations the solutions are generalized polynomials. The existence of non-trivial monomial terms of the solution strongly depends on the algebraic properties of some related families of parameters. As a continuation of the previous work [A. Varga, Cs. Vincze, G. Kiss, Algebraic methods for the solution of linear functional equations, Acta Math. Hungar.] we are going to present constructive algebraic methods of the solution in some special cases. Explicit examples will be also given.
    Źródło:
    Opuscula Mathematica; 2015, 35, 6; 957-972
    1232-9274
    2300-6919
    Pojawia się w:
    Opuscula Mathematica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Oxychilus (Mediterranea) hydatinus (Gastropoda: zonitidae) new for Slovakia, with notes on its distribution in Hungary
    Autorzy:
    Dvorak, L.
    Horsak, M.
    Varga, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/84090.pdf
    Data publikacji:
    2004
    Wydawca:
    Uniwersytet Mikołaja Kopernika. Wydział Biologii i Ochrony Środowiska. Stowarzyszenie Malakologów Polskich
    Opis:
    The first records of Oxychilus hydatinus (Rossmässler, 1838) from Slovakia are reported. The material was identified based on a detailed comparative study of shell morphology and internal structure of penis. The Slovak sites represent the northernmost occurrence of this species.
    Źródło:
    Folia Malacologica; 2004, 12, 3
    1506-7629
    Pojawia się w:
    Folia Malacologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The history and natural regeneration of a secondary oak-beech woodland on a former wood-pasture in Hungary
    Autorzy:
    Varga, A.
    Odor, P.
    Molnar, Z.
    Boloni, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/59012.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    history
    natural regeneration
    secondary forest
    oak-beech forest
    socioeconomic change
    forest cover change
    large tree
    wood pasture
    Hungary
    Opis:
    Characteristic features of European woodland include both a reduction in natural forest areas and an increase in former agricultural areas occupied by secondary woodland. The management of these areas is challenging in terms of nature conservation, agricultural and forestry management and policy. The aim of our study was to reconstruct the history and to document the current tree stand structure for a secondary oak-beech woodland in Hungary. Towards the end of the 1800s, this area which was once almost completely occupied by a continuous forest, had been transformed into a wood-pasture. As a result of its gradual abandonment, the closed forest stand of the pasture increased from 10 to 52% between 1963 and 2005. The most characteristic feature of this woodland is the abundance of large trees. Globally, the number of large and ancient trees is rapidly diminishing. Therefore preserving and maintaining such areas, where large trees could live, is an essential management task.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2015, 84, 2
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Anatomy and taxonomic position of Elma H. Adams, 1866: a high-spired Southeast-Asian genus of Streptaxidae (Gastropoda: Eupulmonata)
    Autorzy:
    Pall-Gergely, B.
    Hunyadi, A.
    Varga, A.
    Rowson, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/83039.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Mikołaja Kopernika. Wydział Biologii i Ochrony Środowiska. Stowarzyszenie Malakologów Polskich
    Tematy:
    anatomy
    taxonomic position
    Elma
    Asian genus
    Streptaxidae
    Gastropoda
    Eupulmonata
    systematics
    snail
    land snail
    carnivorous animal
    Źródło:
    Folia Malacologica; 2015, 23, 2
    1506-7629
    Pojawia się w:
    Folia Malacologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Imaging the Surface Domain Structure of Amorphous Glass-Coated Microwires by Bitter Colloid
    Autorzy:
    Richter, K.
    Varga, R.
    Thiaville, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1199821.pdf
    Data publikacji:
    2014-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.60.Ch
    75.60.Jk
    Opis:
    The fast domain wall dynamics of amorphous glass-coated microwires can be changed drastically by properly selected annealing temperature. Here, the effect of thermal annealing on the surface domain structure of microwires is examined. Imaging the surface domain structure by Bitter colloid revealed the periodic pattern in each studied sample. Thermal annealing of microwires results in the five times increase of the domain wall velocity, as compared to the as-cast state. Influence of the surface domain structure on the fast domain wall propagation in microwires is discussed.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 1; 72-73
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Thermal Treatment on Domain Wall Dynamics in Glass-Coated Microwires
    Autorzy:
    Richter, K.
    Varga, R.
    Zhukov, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1506966.pdf
    Data publikacji:
    2010-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.60.Ej
    75.60.Jk
    Opis:
    We have studied the effect of thermal treatment on amorphous glass-coated $Fe_{40}Si_{7.5}B_{15}$ microwires. This microwire is characterized by transverse domain wall regime only, with maximum domain wall velocity of about 1500 m/s. Annealing at 200°C slightly increases its transverse domain wall velocity, probably due to the reduction of mechanical stresses during the thermal annealing. Annealing at 300°C leads to drastical increase of domain wall mobility and domain wall velocity of the transverse domain wall up to 2500 m/s. Moreover, vortex regime appears in this case. Thanks to it, maximum domain wall velocity of around 5000 m/s was observed.
    Źródło:
    Acta Physica Polonica A; 2010, 118, 5; 738-739
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Negative Mobility of Single Domain Wall in Magnetic Microwires
    Autorzy:
    Varga, R.
    Richter, K.
    Zhukov, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1506994.pdf
    Data publikacji:
    2010-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.60.Ej
    75.60.Jk
    Opis:
    Here, we present the domain wall dynamics in thin magnetic wires that exhibit even negative mobility regime. Such a regime is well below the Walker limit and is a result of structural relaxation. It disappears at high frequencies and it can be enhanced by application of mechanical stress. Moreover, the domain wall velocity was found to be almost field-independent at certain measuring conditions. Anyway, the domain wall velocity remains quite high (> 450 m/s) in this regime.
    Źródło:
    Acta Physica Polonica A; 2010, 118, 5; 747-748
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of deuterium content of water on the growth of plant embryo and free radical producing processes
    Autorzy:
    Kiss, S A
    Varga, I.S.
    Powiązania:
    https://bibliotekanauki.pl/articles/14566.pdf
    Data publikacji:
    2007
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
    Tematy:
    seedling mass
    natural water
    plant seed
    producing process
    free radical formation
    plant growth
    water
    plant embryo
    seedling length
    deuterium content
    Opis:
    In the course of germinating plant seeds - if the deuterium (D) concentration in the germinating medium (water) is lower or higher than in natural water (150 ppm) - the length and mass of seedlings (coleoptil, epicotyl, root) proportionally decrease. The cause of the decrease owing to the changed D concentration is explained partly on energetic - partly on free radical basis and proved by measuring. In waters with lower or higher than natural D concentration the energy supply decreases while the free radical formation increases. Free radicals exert their influence by inactivating the bios substances (e.g. auxin) through oxidation. This seems to explain the mechanism of the ensuing changes.
    Źródło:
    Journal of Elementology; 2007, 12, 2
    1644-2296
    Pojawia się w:
    Journal of Elementology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Computer analysis of electromotoric swivel walker movement
    Autorzy:
    Varga, J.
    Hajduk, M.
    Świć, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/117705.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Promocji Wiedzy
    Tematy:
    swivel walker
    stability
    trajectory
    Opis:
    The first mechanical construction of swivel walker is from year 1963 and it was aimed for support movement of people with disabilities. This solution was very difficult and it was main reason for purpose of electromotoric module, which facilitates movement and reduce effort of people with disabilities. Therefore further research in this area are still provided. In this paper trajectory of swivel walker with electromotoric modules is described. To analyze the tilt and trajectory structure of the walker SolidWorks software was implemented.
    Źródło:
    Applied Computer Science; 2016, 12, 4; 88-95
    1895-3735
    Pojawia się w:
    Applied Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermopower and Surface Magnetic Characterization of Ni Thin Layers
    Autorzy:
    Szabo, A.
    Varga, R.
    Ujhelyi, F.
    Komanicky, V.
    Zorkovska, A.
    Lovas, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1201858.pdf
    Data publikacji:
    2014-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    72.15.Jf
    73.50.Lw
    75.70.-i
    68.55.jm
    Opis:
    Thermoelectric power and surface magnetic characterization of Ni evaporated layers will be presented, with the comparison with the bulk Ni material. The bulk electrical and magnetic properties are developed gradually, approaching the bulk properties, as the layer thickness increases. Below the thickness of 180 nm, the evaporated layers are amorphous. The epitaxial stresses can appear in both, the anomaly observed in the thermopower and the surface coercivity measurements.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 1; 204-205
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Study of Magnetization Process in Amorphous FeNiSiB Microwires
    Autorzy:
    Gamcova, J.
    Varga, R.
    Hernando, B.
    Zhukov, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1534004.pdf
    Data publikacji:
    2010-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Kj
    75.60.Ej
    75.60.Jk
    Opis:
    We have studied the magnetization process in amorphous $Fe_{49.6}Ni_{27.9}Si_{7.5}B_{15}$ microwire. It was found that the hysteresis mechanism consists of two contributions: magnetoelastic and structural relaxation. It was shown that at low frequencies, the magnetization process is controlled mainly by the structural relaxation. At higher frequencies (above 50 Hz), the relaxation effect disappears and switching field is determined mainly by the magnetoelastic contribution. Moreover, the effect of thermal treatment at temperature 300°C has been studied. As-cast microwire is almost unsensible to the applied tensile stress since the applied stresses are lower than that induced during production. After annealing, the stresses relax and stress sensibility of microwires increases.
    Źródło:
    Acta Physica Polonica A; 2010, 118, 5; 807-808
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Recoil Effect and Surface Excitations on the Inelastic Mean Free Paths of Electrons in Polymers
    Autorzy:
    Lesiak, B.
    Kosiński, A.
    Jablonski, A.
    Sulyok, A.
    Gergely, G.
    Tóth, J.
    Varga, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/2046849.pdf
    Data publikacji:
    2006-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    82.35.Cd
    82.80.Pv
    87.16.Ac
    Opis:
    In this work, the influence of recoil effect and surface excitations on the inelastic mean free paths for polythiophenes is investigated. The inelastic mean free paths of electrons in polythiophenes are measured with the elastic peak electron spectroscopy method using the Ag standard and the electron elastic scattering cross-sections from the database NIST 3.1 in the electron kinetic energy range 200-5000 eV. The Monte Carlo model is applied for evaluating the electron backscattering intensities from the polymers and the Ag standard, as well as for evaluating electrons quasi-elastically backscattered from atoms of different atomic numbers (the recoil effect). The surface excitation corrections are accounted for using the formalism of Chen, with the material parameters for polythiophenes evaluated from the elastic peak electron spectroscopy method. Deviations due to recoil effect and surface excitations to the inelastic mean free paths are compared and discussed. Correction to the inelastic mean free paths due to recoil effect is considerable but is smaller, however, than the correction due to surface excitations. Accounting for recoil effect and surface excitations leads to improvement of the inelastic mean free paths, as compared to the inelastic mean free paths resulting from the predictive formulae of Gries.
    Źródło:
    Acta Physica Polonica A; 2006, 109, 6; 789-800
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Domain Wall Dynamics in Amorphous Microwires
    Autorzy:
    Richter, K.
    Kostyk, Y.
    Varga, R.
    Zhukov, A.
    Larin, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/1813506.pdf
    Data publikacji:
    2008-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.60.Ej
    75.60.Jk
    Opis:
    Here we present the domain wall dynamics in FeNi-based microwires with positive magnetostriction. Two different ranges were found which differs by the measured domain wall mobility. At low fields, the domain wall dynamics exhibit small mobility, whereas at higher field the domain wall mobility increases. The difference in the two regimes of the domain wall dynamics is treated in terms of the different domain wall structure. At low fields, the transversal domain wall is expected, with low domain wall mobility. At high field, the vortex-type domain wall with high domain wall mobility is created.
    Źródło:
    Acta Physica Polonica A; 2008, 113, 1; 7-10
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermal Properties of Conducting Polypyrrole Nanotubes
    Autorzy:
    Rudajevová, A.
    Varga, M.
    Prokeš, J.
    Kopecká, J.
    Stejskal, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402141.pdf
    Data publikacji:
    2015-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    72.80.Le
    66.70.Hk
    65.40.De
    66.30.Xj
    Opis:
    Thermal properties of polypyrrole nanotubes synthesized by the chemical oxidation of pyrrole with iron(III) chloride in the presence of methyl orange as structure-guiding template, have been investigated. As-prepared polypyrrole salt and corresponding base were compressed into pellets. Thermogravimetric analysis has shown that the heating/cooling of both polymers is connected with water desorption/re-absorption. This process influences all temperature dependences of the thermophysical properties. The specific heat of both polypyrrole forms was the same at 35°C. The thermal diffusivity of polypyrrole base was lower than that of the salt. The dilatational characteristics are strongly influenced by water desorption/re-absorption. Water desorption is connected with the contraction of polypyrrole and its re-absorption with the expansion of polypyrrole. The electrical resistivity was measured, in analogy to thermal experiments, by a four-point van der Pauw method. The electrical resistivity was 0.016 and 10.2 Ωcm at room temperature, for both materials. The electrical resistivity was also influenced by water desorption/re-absorption as well as other thermophysical properties.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 4; 730-736
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic Characterization of $Co_2MnSi$ Heusler Microwires
    Autorzy:
    Ryba, T.
    Vargova, Z.
    Varga, R.
    Kováč, J.
    Zhukova, V.
    Zhukov, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1368011.pdf
    Data publikacji:
    2014-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Cc
    75.30.Gw
    Opis:
    We report on the basic magnetic properties of glass-coated $Co_2MnSi$ Heusler microwires. Measurements of hysteresis loops in different directions show that easy magnetization axis coincides with the wire's axis. The frequency dependence of the coercive field has been measured at room temperature in the frequency range from 10 Hz to 10 kHz. The coercivity decreases with the frequency up to 100 Hz and then increases linearly up to 1 kHz.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 1; 196-197
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Current and potential oncomarkers in diagnosing breast cancer
    Obecnie używane i potencjalne markery nowotworowe w diagnostyce raka piersi
    Autorzy:
    Bilecová-Rabajdová, M.
    Urban, P.
    Grešová, A.
    Varga, J.
    Gregová, K.
    Stupák, M.
    Mareková, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/271594.pdf
    Data publikacji:
    2012
    Wydawca:
    Górnośląska Wyższa Szkoła Pedagogiczna im. Kardynała Augusta Hlonda
    Tematy:
    rak piersi
    diagnostyka
    markery molekularne
    markery nowotworowe TVMs
    breast cancer
    diagnostics
    molecular markers
    tumour vascular markers
    Opis:
    Breast cancer is a very serious disease from both an economical and social point of view, because of its high incidence and mortality, as well as its prevalence. Genetic and epigenetic changes as well as the resultant deregulation of mechanisms that affect cellular processes are reflected in the final stage, like significant variability in phenotype. These changes have multiple factors in clinical, morphological but also molecular terms, and they greatly affect the possibility of accurate diagnosis of breast cancer in its early stages. Since no combination of clinical examination, mammography and ultrasonography together with CT and MRI can achieve 100% sensitivity, clinical practice is supported with diagnostic methods based on the monitoring of tumour markers with the emphasis on molecular markers. This review describes the most common molecular markers already used for earlier clinical diagnostics and also proposes new possible markers from the tumour vascular markers group. Any new oncomarkers to improve diagnostic sensitivity and specificity will be of great benefit, and in clinical practice, they may provide an opportunity for early diagnostic and therapeutic intervention, and subsequently better prognosis for the patient as well.
    Rak piersi jest bardzo poważną chorobą, zarówno z punktu widzenia ekonomicznego jak i społecznego, ze względu na dużą zachorowalność i umieralność, a także na zakres jego występowania. Zmiany genetyczne i epigenetyczne, jak również wynikająca z nich deregulacja mechanizmów, które wpływają na procesy komórkowe są odzwierciedlone w ostatnim stadium choroby, jak znaczna zmienność fenotypu. Zmiany te mają wiele przyczyn z punktu widzenia klinicznego, morfologicznego, ale również molekularnego oraz znacznie wpływają na możliwość dokładnego rozpoznania raka piersi w jego wczesnych fazach. Ponieważ żadna kombinacja badań klinicznych, mammografii i USG wraz z tomografią komputerową i obrazowaniem magnetyczno-rezonansowym nie może osiągnąć 100% czułości, praktyka kliniczna jest wspierana metodami diagnostycznymi opartymi na monitoringu markerów nowotworowych, ze szczególnym uwzględnieniem markerów molekularnych. Niniejsza recenzja opisuje najbardziej typowe markery molekularne wykorzystywane we wczesnej diagnostyce klinicznej, a także proponuje nowe potencjalne markery z grupy markerów nowotworowych TVMs . Wszelkie nowe markery nowotworowe poprawiające czułość i dokładność diagnostyki będą bardzo pomocne, a w praktyce klinicznej mogą pozwolić na wczesną diagnostykę i leczenie, co polepszy także rokowania pacjenta.
    Źródło:
    Journal of Ecology and Health; 2012, R. 16, nr 3, 3; 138-143
    2082-2634
    Pojawia się w:
    Journal of Ecology and Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Susceptibility Spectroscopy in FeNiSiB Microwires
    Autorzy:
    Olivera, J.
    Gamcova, J.
    Varga, R.
    Santos, J.
    Prida, V.
    Sanchez, M.
    Hernando, B.
    Zhukov, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1813592.pdf
    Data publikacji:
    2008-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Kj
    75.60.Jk
    Opis:
    Here, we present the study on the influence of the Ni content on the magnetization processes of the amorphous glass-coated $Fe_{77.5-x}Ni_xSi_{7.5}B_{15}$ (x = 0-40) microwires. Measurement of the amplitude dependence of the complex susceptibility was used to observe the magnetization process. It is shown that the magnetization process in the presented samples runs mainly through the domain wall motion.
    Źródło:
    Acta Physica Polonica A; 2008, 113, 1; 155-158
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ni_2FeSi Heusler Glass Coated Microwires
    Autorzy:
    Galdun, L.
    Ryba, T.
    Prida, V.
    Hernando, B.
    Zhukova, V.
    Zhukov, A.
    Vargová, Z.
    Varga, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1032750.pdf
    Data publikacji:
    2017-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.20.Be
    72.20.Lp
    Opis:
    We report on fabrication, structural and magnetic properties of novel Heusler-type glass coated Ni₂FeSi microwires that were prepared by the Taylor-Ulitovsky method, having a metallic nucleus diameter about 3.9 μm and total sample diameter of 39 μm. This single step and low cost fabrication technique offers to prepare up to km of glass-coated microwires starting from few g of cheap elements for diverse applications. The X-ray diffraction data from the metallic nucleus indicates L2₁ crystalline structure (a=5.563 Å), with a possible DO3 disorder. Magnetic measurements determined the Curie temperature well above the room temperature (770 K) together with uniform easy magnetization axis of the metallic core, which predisposes this material to a suitable candidate for spintronic applications.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 4; 851-853
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic Characterization of Melt-Spun Co-Ni-Ga Ferromagnetic Superelastic Alloy
    Autorzy:
    Mino, J.
    Ipatov, M.
    Gamcova, J.
    Saksl, K.
    Durisin, M.
    Zhukova, V.
    Vargova, Z.
    Zhukov, A.
    Varga, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1030261.pdf
    Data publikacji:
    2017-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    62.20.fg
    Opis:
    Ribbons of composition Co₄₉Ni₂Ga₃₀ have been prepared by melt-spinning method. X-ray diffraction investigation revealed single phase with B2 structure at room temperature. However, analysis of magnetization dependence of temperature suggests phase transition in the range 150-250 K. Resistivity measurements revealed similar transition with shift to higher temperatures in the presence of magnetic field.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 4; 1075-1077
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Positronium Trapping in Porous Solids: Means and Limitations for Structural Studies
    Autorzy:
    Kajcsos, Zs.
    Liszkay, L.
    Duplâtre, G.
    Varga, L.
    Lohonyai, L.
    Pászti, F.
    Szilágyi, E.
    Lázár, K.
    Kótai, E.
    Pál-Borbély, G.
    Beyer, H. K.
    Caullet, P.
    Patarin, J.
    Azenha, M. E.
    Gordo, P. M.
    Lopes Gil, C.
    de Lima, A. P.
    Ferreira Marques, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2042216.pdf
    Data publikacji:
    2005-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    36.10.Dr
    78.70.Bj
    61.43.Gt
    Opis:
    Positron annihilation techniques are used for the structural investigation of solids but the interpretation of results in grainy and porous media is still unclear. A unique picture can be obtained assuming that the dominant process is Ps trapping in competing "extended free volume" sites. In samples with a large amount of free volumes near-saturation Ps trapping will rule the lifetime pattern, and very long lifetimes of over 100 ns might arise from o-Ps trapped in mesopores. It is shown that lifetime parameters must be corrected for the 3γ/2γ counting efficiency ratio. The results demonstrate the high sensitivity of Ps to mesopores in zeolites but also that Ps-trapping poses limitations on the applicability of lifetime to structural investigation in porous systems. The evolution of the lifetime spectra upon changes in the sample and measuring conditions should be considered in a complex way, observing not only changes in some selected components but in the whole lifetime pattern simultaneously.
    Źródło:
    Acta Physica Polonica A; 2005, 107, 5; 729-737
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-22 z 22

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