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Wyszukujesz frazę "Lopez, J." wg kryterium: Autor

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    Wyświetlanie 1-92 z 92
    Tytuł:
    Effects of Doping on the Structural Distortion of $La_{0.7}Dy_{0.3}Mn_{1-x}Zn_xO_3$
    Autorzy:
    López, J.
    Ríos, M.
    Mendoza, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1398317.pdf
    Data publikacji:
    2017-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.47.Lx
    61.50.-f
    Opis:
    Structural properties were studied in the orthorhombic perovskite $La_{0.7}Dy_{0.3}Mn_{1-x}Zn_{x}O_3$, synthesized in the range 0 ≤ x ≤ 0.4. X-ray diffraction data, refined by the Rietveld analysis, shows for x < 0.1 the presence of stretched octahedra on the Mn-O plane, and, for x > 0.1, the existence of elongated octahedra along the c axis. Increased Zn doping causes a direct structural effect: one Zn atom distorts four neighboring MnO₆ octahedra on the Mn-O plane. It was observed that the unit cell volume containing Dy decreases as x increases, whereas the unit cell volume containing La increases as x decreases.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 5; 1254-1255
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Road and street smart lighting control systems as a new application area of the hot-potato protocol
    Autorzy:
    Kiedrowski, P.
    Boniewicz, P.
    Lopez, J. G.
    Prado, R. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/97614.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    smart lighting
    smart grid
    lighting control network
    road lighting
    street lighting
    PLC
    WSN
    Opis:
    This paper presents the new application area of the hot-potato routing protocol, which is a “last-mile” communication network for controlling systems of road and street lighting. Four variants of the hot-potato protocol are analyzed with use of the graph theory. For the assessment of the traffic parameters the ETX parameter is used in relation to the length of the shortest path. Proposed methods are independent of the media type and can be implemented either in wireless or PLC.
    Źródło:
    Computer Applications in Electrical Engineering; 2014, 12; 521-530
    1508-4248
    Pojawia się w:
    Computer Applications in Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Distributed Decision-Support System for Virtual Prototyping
    Autorzy:
    Tirpak, T. M.
    Lach, L. E.
    Xiao, W.
    Lopez, J. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/375959.pdf
    Data publikacji:
    2007
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    Distributed Decision-Support
    virtual prototyping
    CAE
    Opis:
    Virtual Prototyping (VP) is a data-driven design process that promotes both knowledge reuse and innovation. High-profile applications in the automotive and aerospace industries have demonstrated its potential to significantly reduce prototype cycles, time to market, and total product cost. This paper addresses VP as a specialized application of Decision-Support Systems, and discusses common requirements for engineering design tools, as well as requirements specific to the design of electronic products, such as mobile phones. Motorola Labs' test bed for VP is introduced in terms of its open, agent-based architecture utilizing Java CORBA. One of the key principles of the VP System is the reuse of expert knowledge across multiple engineering domains. This is highlighted via several use cases, showing that the system can function not only as an Intranet-accessible repository of model services but also as an integral part of decision-making within the native CAD environment.
    Źródło:
    Decision Making in Manufacturing and Services; 2007, 1, 1-2; 137-152
    1896-8325
    2300-7087
    Pojawia się w:
    Decision Making in Manufacturing and Services
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Topological Correlations in a Layer Adsorbed on a Crystal Surface
    Autorzy:
    Wojtczak, L
    Zasada, I
    Bosse Le, J. C
    Lopez, J
    Rousseau, J
    Powiązania:
    https://bibliotekanauki.pl/articles/896312.pdf
    Data publikacji:
    1990
    Wydawca:
    Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
    Opis:
    The incoherent scattering of electrons by a layer adsorbed at a single crystal surface is determined by the topological correlations of elements forming the adsorbed layer. The model for the description of atoms or molecules adsorbed on the surface is formulated in terms of occupation operators which are expressed in terms of pseudospin operators with a given spin value. The correlations can be determined by the fluctuation dissipation theorem in connection with the susceptibility or given directly by means of the Green functions properly chosen. An example of the topological or chemical disorder of two components is considered in detail. The calculations of the topological correlations allow us to find the incoherent scattering amplitude as a function of the surface coverage which can be experimentally detected.
    Źródło:
    Acta Physicae Superficierum; 1990, 1
    0867-2997
    Pojawia się w:
    Acta Physicae Superficierum
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Caracterisation de l'ordre par diffraction d'electrons
    Autorzy:
    Le Bosse, J. C.
    Lopez, J.
    Hansali, G.
    Wiatrowski, G.
    Rousseau, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1929266.pdf
    Data publikacji:
    1993-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.14.Dc
    68.10.Jy
    Opis:
    CHARACTERIZATION OF THE ORDER BY ELECTRON DIFFRACTION: In the case of a solid with a local atomic order, we can consider only a statistical description of atomic positions. For a homogeneous phase, this description is given by the two-site occupancy correlation function, the three-site occupancy correlation function, ... etc. The local atomic order is investigated by experiments in which the solid is bombarded with a well-collimated monoenergetic beam of particles (here electrons). Starting from a model describing the force law between an electron and an atomic scatterer and from a model of the solid describing the distribution of atoms in space, a computation of elastically backscattered intensities can be carried out. The latter depends on geometrical parameters which are determined in such a way that one gets the best agreement between the results of calculation and the measurements. This work aims to provide the way of proceeding to calculate the diffuse intensity. The main difficulty in this task appears when we undertake to treat the problem of multiple scattering. We provide here a detailed description of a calculation corresponding to the case of the backscattering of electrons at a single crystal surface covered with a partially disordered atomic layer. Assuming that the coverage in adatoms is small and these adatoms are weak scatterers, we can neglect the multiple scattering events inside the layer. This simplifying assumption leads to an expression of the diffuse intensity in terms of: the Fourier transform on the 2D surface lattice of the pair correlation function; the renormalized transition matrices of the different kinds of adatoms.
    Źródło:
    Acta Physica Polonica A; 1993, 83, 5; 567-580
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Two-Site Correlations in a Surface Layer Adsorbed on the Crystal
    Autorzy:
    Wojtczak, L.
    Zasada, I.
    Le Bossé, J. C.
    Lopez, J.
    Rousseau, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1891742.pdf
    Data publikacji:
    1991-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    68.35.-p
    Opis:
    The incohorent scattering of electrons by layer adsorbed at a single crystal surface is determined by the Fourier transform of correlation functions of elements forming this layer. The model of the description of atoms or molecules adsorbed on the surface is formulated by the occupation operators which are represented by the pseudospin operators. The calculations of the correlation functions are performed by means of methods which consider a given pair of elements embedded in the effective field of remaining elements of the system while the interaction between the elements of the pair are taken in its exact form. Two approaches are presented here, i.e. the cumulant average and constant coupling approximations, and the case of binary chemisorption is considered in detail. The problem of the correlation symmetry is also discussed.
    Źródło:
    Acta Physica Polonica A; 1991, 80, 5; 631-648
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Antioxidant activity and cytotoxic effect of Chilean Buddleja globosa (matico) and Ribes magellanicum (zarzaparrilla) flower extracts
    Autorzy:
    Zamorano-Aguilar, P.
    Morales, M.
    Rivillas, Y.
    López, J.
    Rojano, B.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/12989165.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2020, 19, 6; 59-70
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Monte Carlo Simulation of Partially Ordered Atomic Layers Adsorbed on the Monocristalline Surfaces
    Autorzy:
    Wiatrowski, G.
    Le Bossé, J. C.
    Lopez, J.
    Rousseau, J.
    Zasada, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1929295.pdf
    Data publikacji:
    1993-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    68.35.-p
    Opis:
    The calculations of the correlations functions and structure factors are performed by means of the Monte Carlo simulation. The results for O/Ni(001) system are presented and compared with those obtained using self-consistent molecular field approximation and cumulant expansion method. The simulation for more complex system CO/Pt(111) is also performed. The calculations of the topological correlations allow us to find the coverage dependence of the incoherent scattering amplitude which can be experimentally detected.
    Źródło:
    Acta Physica Polonica A; 1993, 83, 5; 587-596
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Measurement of biological diversity of arthropods and respiration in soils managed under time-controlled and set-stocked grazing practices in central-west New South Wales, Australia
    Badania różnorodności biologicznej stawonogów i oddychanie w glebach o odmiennych systemach wypasania w centralno-zachodniej Nowej Południowej Walii, Australia
    Autorzy:
    Moulin, M.
    Lopez, J.
    Raman, A.
    Hodgkins, D.
    Adams, A.
    Mannix, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/906653.pdf
    Data publikacji:
    2012
    Wydawca:
    Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
    Opis:
    In this study we compare the effects of two contrasting grazing regimes (time-controlled grazing (TCG) vs set-stocked grazing (SSG)) on selected parameters of soil biological health. The purpose of the study was to evaluate these soil parameters as potential indicators of soil health and thence sustainable soil management. Two parameters, viz., arthropod biological diversity and soil respiration were chosen as reliable indicators of soil health. Samples of pasture cover, arthropod populations, and soil from varied depths were obtained in spring (September-November 2010) and autumn (March-May 2011). Results from the autumn showed a strong effect of time-controlled grazing with increased arthropod abundance and enhanced soil biological respiration while in spring the differences were not significant. It was concluded that a change to short-duration rotational grazing can be beneficial to soil biological health in the longer term and that the measurement of arthropods present in the litter and topsoil can be a simple yet effective indicator of the impact of grazing regime on soil health.
    Źródło:
    Polish Journal of Soil Science; 2012, 45, 1
    0079-2985
    Pojawia się w:
    Polish Journal of Soil Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Apport des techniques EXAFS et apparentées a la determination de lordre local: application a la tribologie
    Autorzy:
    Lopez, J.
    Le Bossé, J. C.
    Hansali, G.
    Belin, M.
    Martin, J. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1929260.pdf
    Data publikacji:
    1993-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.10.Lx
    Opis:
    CONTRIBUTION OF EXAFS-LIKE TECHNIQUES TO THE DETERMINATION OF LOCAL ORDER: APPLICATION TO TRIBOLOGY: The determination of local order at atomic scale becomes more and more fundamental for understanding superficial phenomena such as tribology and catalysis. Among a few techniques available in this field, we are only concerned with the EXAFS-like ones (EXAFS, SEXAFS, EXELFS, SEELFS, etc.). The difficulties appearing all along the numerical treatment of such spectra are carefully analysed and a methodology is proposed in view to obtain reliable radial distribution functions. Some applications of these techniques are presented in two fields connected with tribology: friction induced amorphisation in high vacuum and characterization of interfacial solid bodies created during a wear process including an antiwear additive.
    Źródło:
    Acta Physica Polonica A; 1993, 83, 5; 551-566
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spinor representation of the electromagnetic field
    Autorzy:
    Tuladhar, B. Man
    López-Bonilla, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1178035.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Faraday’s tensor
    Lorentz transformations
    Maxwell equations
    Maxwell spinor
    Newman-Penrose formalism
    Quaternions
    Opis:
    We exhibit the tensor, spinor and Newman-Penrose (NP) forms of Faraday tensor and the Maxwell equations. Our approach is based in real and null tetrads, which allows introduce in natural manner the NP and 2-spinor techniques to study arbitrary electromagnetic fields, with special emphasis in the relationship between quaternions and Lorentz transformations.
    Źródło:
    World Scientific News; 2018, 95; 1-20
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of spermidine on germination of Salix spp. after storage under controlled conditions
    Autorzy:
    Wawrzyniak, M.K.
    Ley-Lopez, J.M.
    Kijowska-Oberc, J.
    Chmielarz, P.
    Ratajczak, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/2130180.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    hydrogen peroxide
    cryopreservation
    spermidine
    Salix
    antioxidant
    seed storage
    Opis:
    Willows produce fast germinating and short-lived seeds, difficult to store in the long-term under controlled conditions. The aim of this study was to examine the feasibility of storage of three Salix spp. at controlled temperatures (3°, −10°, −196 °C). We also analyzed the effect of spermidine (Spd) as an antioxidant factor in desiccated seeds. Collected seeds were either desiccated or hydrated to obtain 10 levels of moisture content (between app. 4% and 2%) and subjected to storage at temperatures 3°, −10°, or −196 °C (liquid nitrogen; LN). After two months, seeds were germinated on the light at 20 °C. Seeds desiccated below a safe range of moisture content were further tested and germinated on filter paper with additions of 0.25 mM Spd solution. After 7 days seedlings were examined for hydrogen peroxide content (H2O2) and total antioxidant capacity (TAC). Fresh seeds of three Salix species: Persian willow (S. aegyptiaca L.), heartleaf willow (S. cordata Michx.) and crack willow (S. ×fragilis L.) were successfully stored at temperature −10° and −196 °C for two months. After cryopreservation seed of S. aegyptiaca, S. cordata, and S. ×fragilis germinated without viability loss in moisture content ranging from 4.4–15.9%, 6.4–18.5%, and 7.1–11.5% respectively. The addition of Spd during germination of desiccated seed did not affect germination capacity. However, seedlings of S. aegyptiaca had lower hydrogen peroxide content in comparison with control (germination on water). Seedlings of S. cordata showed an increase in hydrogen peroxide content in control after storing in LN. In seedlings of Crack willow Spd increased hydrogen peroxide content. Seeds of tested species differ in response to storage conditions. Salix seeds can be stored successfully for two months at −10° or −196 °C without losing viability in the safe range of moisture content. Storing at 3 °C can be used for storage in the narrower range of seeds’ moisture content, however, seedlings stored at this temperature produce a higher level of reactive oxygen species. Germinating seeds in Spd did not increase their germination, however in S. aegyptiaca and S. cordata decreased hydrogen peroxide content.
    Źródło:
    Dendrobiology; 2022, 87; 137-148
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Identification of Gastric Cancer from Speckle Patterns
    Autorzy:
    Andrade-Eraso, C.
    Patiño-Velasco, M.
    Vásquez-López, J.
    León, J.
    Bolaños-Pantoja, G.
    Trivi, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1490749.pdf
    Data publikacji:
    2012-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.68.+m
    42.87.-d
    87.50.W-
    Opis:
    Speckle technique is based on the light intensity distribution randomly formed when a laser light is reflected on a rough surface, creating a pattern of illuminated grains (constructively) and dark (destructive) on scales of 1 μm. When the samples are displaced or deformed, the speckle pattern is altered. In this paper we present speckle patterns obtained from samples of gastric mucosa that is physically altered for the carcinogenesis process. Biopsies were studied with different diagnoses and were grouped according to the characteristics of speckle patterns. Speckle patterns were obtained by illuminating the samples with green laser. Morphological parameters of the speckle patterns reveal existence of 3 descriptors: the average grain size, hydraulic radius and the radio of the Weddel disc, which showed a high, intermediate and low value. The comparison shows agreement between the histopathological diagnosis and the values obtained by the speckle technique, making this technique emerge as a new classification system for quantitative diagnosis of precancerous lesions.
    Źródło:
    Acta Physica Polonica A; 2012, 121, 1; 62-64
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Engine diagnosis based on vibration analysis using different fuel blends
    Autorzy:
    Grajales, J. A.
    Quintero, H. F.
    López, J. F.
    Romero, C. A.
    Henao, E.
    Cardona, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/328420.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    engine diagnosis
    vibration analysis
    frequency analysis
    diagnostyka silnika
    analiza drgań
    analiza częstotliwościowa
    Opis:
    Fault diagnosis of an internal combustion engine is proposed herein by means of vibration analysis and a comparative analysis of normal operation and induced misfire scenarios. In order to validate previous works on misfire with pure gasoline, measurements also included tests performed with ethanol-gasoline fuel blends. According to results, changes in the fuel mix seem to have little impact on the performance and behaviour of the engine. And additionally, the particular frequency components that allowed differentiation between normal and faulty conditions were also present on all the fuel blends tested. Fast Fourier Transform was applied to obtain the frequency domain of the signal as a previous step to the subsequent identification process based on statistical characteristics extraction. A fuel blend classification method based on the analysis of the vibration signals of the engine was studied using envelope, Spike Energy and Peak Value techniques. Differentiation was possible with the extraction of the statistical features of the Peak Value spectrum of the longitudinal acceleration with a specific filter selection.
    Źródło:
    Diagnostyka; 2017, 18, 4; 27-36
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On operator ideals related to (p,σ)-absolutely continuous operators
    Autorzy:
    López Molina, J. A.
    Sánchez Pérez, E. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1206151.pdf
    Data publikacji:
    2000
    Wydawca:
    Polska Akademia Nauk. Instytut Matematyczny PAN
    Tematy:
    tensor norms
    operator ideals
    (p,σ)-absolutely continuous operators
    $g_{p,σ}$-nuclear and $g_{p,σ}$ integral operators
    Opis:
    We study tensor norms and operator ideals related to the ideal $P_{p,σ}$, 1 < p < ∞, 0 < σ < 1, of (p,σ)-absolutely continuous operators of Matter. If α is the tensor norm associated with $P_{p,σ}$ (in the sense of Defant and Floret), we characterize the $(α')^t$-nuclear and $(α')^t$- integral operators by factorizations by means of the composition of the inclusion map $L^r(μ) → L^1(μ) + L^p(μ)$ with a diagonal operator $B_w:L^{∞}(μ) → L^r(μ)$, where r is the conjugate exponent of p'/(1-σ). As an application we study the reflexivity of the components of the ideal $P_{p,σ}$.
    Źródło:
    Studia Mathematica; 2000, 138, 1; 25-40
    0039-3223
    Pojawia się w:
    Studia Mathematica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Linearization of (second order operator)1/2
    Autorzy:
    López-Bonilla, J.
    López-Vázquez, R.
    Vidal-Beltrán, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1164128.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Cauchy-Riemann conditions
    Laplacian operator
    Pauli matrices
    Weyl and Dirac equations
    Opis:
    We illustrate by means of the Pauli matrices how to linearize (second order operator)1/2 associated to the Weyl and Dirac equations. Besides, we exhibit the square root of the two dimensional Laplacian operator.
    Źródło:
    World Scientific News; 2018, 108; 224-228
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Matrices and orthogonal polynomials
    Autorzy:
    López-Bonilla, J.
    López-Vázquez, R.
    Vidal-Beltrán, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1177448.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Chebyshev
    Hermite
    Laguerre and Legendre polynomials
    Lanczos algorithm
    Leverrier-Takeno’s method
    Three-member recurrence
    Opis:
    The Lanczos algorithm of minimized iterations shows that a polynomial verifying a three-term recurrence relation can be written as the determinant of a tridiagonal matrix, here we exhibit examples of this property. Besides, for several orthogonal polynomials, Cohen proved that their roots are the proper values of symmetric tridiagonal matrices; here we give examples of this Cohen’s result for the Legendre, Laguerre, and Hermite polynomials, which are important in applications to numerical analysis and quantum mechanics.
    Źródło:
    World Scientific News; 2018, 103; 234-241
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An alternative to Gower’s inverse matrix
    Autorzy:
    López-Bonilla, J.
    López-Vázquez, R.
    Vidal-Beltrán, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1177483.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Adjoint matrix
    Characteristic equation
    Eigenvalue problem
    Faddeev-Sominsky’s method
    Gower’s pseudoinverse matrix
    Leverrier-Takeno’s algorithm
    Opis:
    We show that the Faddeev-Sominsky’s process allows construct a natural inverse for any square matrix, which is an alternative to the inverse obtained by Gower.
    Źródło:
    World Scientific News; 2018, 102; 166-172
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Differentiation of a Fourier series
    Autorzy:
    Cruz-Santiago, R.
    López-Bonilla, J.
    López-Vázquez, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1177486.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Fejér-Lanczos σ-Factors
    Fourier series
    Generalized derivative
    Least squares method
    Opis:
    It is very known that if the operator d/dx acts on each term into a convergent Fourier series (FS) then it may result a divergent series. This situation is remedied applying the symmetric derivative to FS, which implies the existence of the important Fejér-Lanczos factors. In this note, we show that the orthogonal derivative also leads to these factors.
    Źródło:
    World Scientific News; 2018, 102; 188-192
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Motion of charged particles in Minkowski spacetime
    Autorzy:
    Caltenco, J. H.
    López-Bonilla, J.
    Piscoran, Laurian Ioan
    Powiązania:
    https://bibliotekanauki.pl/articles/1163835.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Faraday tensor
    Liénard-Wiechert field
    Minkowski spacetime
    Superpotentials for the bounded and radiative parts of Maxwell tensor
    Opis:
    The electromagnetic field generated by a charge in arbitrary motion in Minkowski space is briefly studied. Particularly important is the deduction of superpotential for the radiative part of the Maxwell tensor.
    Źródło:
    World Scientific News; 2018, 108; 18-40
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Shifted Chebyshev-Lanczos polynomials
    Autorzy:
    Caltenco, J. H.
    López-Bonilla, J.
    Peña-Rivero, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1177824.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Feigenbaum constant
    Modified Lanczos polynomials
    Pascal triangle
    Opis:
    We show an algorithm for to express in terms of the modified Chebyshev-Lanczos polynomials , which is important to reduce the degree of a polynomial in the interval [0, 1]. Besides, with the use of into logistic map we obtain a simple geometric interpretation of the Feigenbaum´s universal constant.
    Źródło:
    World Scientific News; 2018, 99; 222-226
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Moore-Penrose’s inverse and solutions of linear systems
    Autorzy:
    López-Bonilla, J.
    López-Vázquez, R.
    Vidal-Beltrán, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1177742.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Least squares technique
    Linear systems
    Pseudoinverse of Moore-Penrose
    SVD
    Opis:
    We employ the generalized inverse matrix of Moore-Penrose to study the existence and uniqueness of the solutions for over- and under-determined linear systems, in harmony with the least squares method.
    Źródło:
    World Scientific News; 2018, 101; 246-252
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analytics and data science applied to the trajectory outlier detection
    Autorzy:
    Lopez, Alexis J.
    Quintero, Perfecto M.
    Hernandez, Ana K.
    Powiązania:
    https://bibliotekanauki.pl/articles/117731.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Promocji Wiedzy
    Tematy:
    spatial-temporal data
    trajectory outlier detection
    trajectory clustering
    dane przestrzenno-czasowe
    wykrywanie wartości odstających trajektorii
    grupowanie trajektorii
    Opis:
    Nowadays, logistics for transportation and distribution of merchandise are a key element to increase the competitiveness of companies. However, the election of alternative routes outside the panned routes causes the logistic companies to provide a poor-quality service, with units that endanger the appropriate deliver of merchandise and impacting negatively the way in which the supply chain works. This paper aims to develop a module that allows the processing, analysis and deployment of satellite information oriented to the pattern analysis, to find anomalies in the paths of the operators by implementing the algorithm TODS, to be able to help in the decision making. The experimental results show that the algorithm detects optimally the abnormal routes using historical data as a base.
    Źródło:
    Applied Computer Science; 2020, 16, 2; 5-17
    1895-3735
    Pojawia się w:
    Applied Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Todorov’s formula involving Stirling numbers of the second kind and Nörlund polynomials
    Autorzy:
    Zúñiga-Segundo, A.
    López-Bonilla, J.
    Vidal-Beltrán, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1165650.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Bernoulli numbers
    Duality property
    Generalized chain rule of differentiation
    Hoppe’s formula
    Nörlund polynomials
    Stirling numbers
    Opis:
    We use the Todorov’s formula for the generalized Bernoulli numbers, in terms of Stirling numbers of the second kind, to deduce the Guo-Qi and Schläfli identities. Our approach is based in the duality property between the Stirling numbers, and in the Nörlund polynomials. We also consider the Janjic’s definitions for the Stirling numbers.
    Źródło:
    World Scientific News; 2018, 107; 201-206
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Continuity equations in curved spaces
    Autorzy:
    Thapa, G. Bahadur
    Hernández-Galeana, A.
    López-Bonilla, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1167152.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Energy and momentum in curved spaces
    Lagrangians in Riemannian spaces
    Noether’s theorem
    Rund-Lovelock’s relations
    Opis:
    In any Riemannian 4-space, we deduce continuity equations which could be interpreted as conservation laws for the energy and momentum of the gravitational field, with special emphasis in general relativity.
    Źródło:
    World Scientific News; 2018, 105; 197-203
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On the Moore-Penrose generalized inverse matrix
    Autorzy:
    Thapa, G. Bahadur
    Lam-Estrada, P.
    López-Bonilla, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1178054.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Compatibility of linear systems
    Moore-Penrose’s pseudoinverse
    SVD
    Opis:
    We analyze the compatibility of linear systems and the uniqueness of the corresponding solution via the singular value decomposition of an arbitrary n x m matrix. Our approach leads in natural manner to the Moore-Penrose’s generalized inverse between the subspaces of activation of the matrix under study.
    Źródło:
    World Scientific News; 2018, 95; 100-110
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Relativistic motion of classical charged particles in a uniform electromagnetic field
    Autorzy:
    Caltenco, J. H.
    López-Bonilla, J.
    Vidal-Beltrán, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1177930.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Frenet-Serret formulae
    Helixs in Minkowski spacetime
    Lorentz equation
    Opis:
    Here we show the importance of a systematic method to generate any integer power of a matrix in 2, 3 and 4 dimensions. This is motivated by the integration of Frenet–Serret formulae for the case of constant curvatures, and by the relativistic motion of a point charge into a homogeneous electromagnetic field, because in such situations it is necessary to calculate being a scalar. By these reasons, we believe that this work can be useful for people interested in linear algebra, differential geometry and electrodynamics.
    Źródło:
    World Scientific News; 2018, 97; 153-167
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On the Faddeev-Sominsky’s algorithm
    Autorzy:
    Torres-Silva, H.
    López-Bonilla, J.
    Vidal-Beltrán, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1166341.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Adjoint matrix
    Characteristic equation
    Eigenvalue problem
    Faddeev-Sominsky’s method
    Inverse matrix
    Leverrier-Takeno’s algorithm
    Resolvent of a matrix
    Opis:
    We comment that the Faddeev-Sominsky’s process to obtain an inverse matrix is equivalent to the Cayley-Hamilton-Frobenius theorem plus the Leverrier-Takeno’s method to construct the characteristic polynomial of an arbitrary matrix. Besides, we deduce the Lanczos expression for the resolvent of the corresponding matrix.
    Źródło:
    World Scientific News; 2018, 106; 238-244
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On eigenvectors associated to a multiple eigenvalue
    Autorzy:
    Cruz-Santiago, R.
    López-Bonilla, J.
    Vidal-Beltrán, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1177790.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Eigenvalue problem
    Faddeev-Sominsky’s technique
    Gower’s method
    Opis:
    If all roots of the characteristic polynomial of a matrix have distinct values, then the Faddeev-Sominsky’s algorithm gives the corresponding eigenvectors. Here we exhibit the method of Gower to construct the proper vectors associated to a multiple eigenvalue.
    Źródło:
    World Scientific News; 2018, 100; 248-253
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Lanczos potential for the Weyl tensor
    Autorzy:
    Morales, J.
    Ovando, G.
    López-Bonilla, J.
    López-Vázquez, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1164250.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    2-spinors
    Conformal tensor
    Lanczos generator
    Newman-Penrose formalism
    Petrov classification
    Spin coefficients
    Weyl-Lanczos equations
    Opis:
    For arbitrary spacetimes with Petrov types O, N and III, we indicate general results about the Lanczos potential for the corresponding Weyl tensor.
    Źródło:
    World Scientific News; 2018, 108; 237-244
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Brans-Edgar-Ludwig equations for empty spacetimes
    Autorzy:
    Morales, J.
    Ovando, G.
    López-Bonilla, J.
    Vidal-Beltrán, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1177881.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Bianchi identities
    Brans-Edgar-Ludwig equations
    Debever-Penrose principal directions
    Null tetrad formalism
    Petrov types
    Opis:
    We use the Newman-Penrose formalism to deduce the compatibility conditions for the Bianchi identities associated to vacuum spacetimes.
    Źródło:
    World Scientific News; 2018, 98; 199-205
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stirling numbers with negative indices
    Autorzy:
    Yaljá Montiel-Pérez, J.
    López-Bonilla, J.
    Vidal-Beltrán, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1177734.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Gould and Schläfli formulas
    Stirling numbers
    Opis:
    We realize applications of expressions for Stirling numbers with negative indices, in particular, we show that the formulas of Zhi-Hong Sun are consequences of the known identities of Schläfli and Gould.
    Źródło:
    World Scientific News; 2018, 101; 217-221
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Atomic layer deposition as a tool of Surface engineering
    Autorzy:
    Tiznado, H.
    Domínguez, D.
    Borbón-Nuñez, H. A.
    López, J.
    Lizárraga, E.
    Romo-Herrera, J. M.
    Murillo-Bracamontes, E.
    Soto, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1163971.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    ALD
    Nanolaminates
    Surface
    nanotubes
    Opis:
    The applications of nanostructured materials are close related to their shape and properties. A comprehensive understanding of the properties modification by controlling the material size, thickness or shape is of key importance. A nanostructure can become a building block to create the upcoming nano-technological stages, where the final characteristics of devices can be fine-tuned from design. In this report it is shown that several physicochemical properties, such as refractive index, band gap or thermal resistance can be modified in a controlled fashion. ALD is a very versatile fabrication technique for building nanotubes (Al2O3 and TiO2), nanolaminates (Al2O3-ZnO, Y2O3-ZrO2 and ZrO2-TiO2) and core-shell materials (diamond-Al2O3) with an exquisite precision on the thickness of the coatings.
    Źródło:
    World Scientific News; 2018, 108; 99-110
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental and Theoretical Study of Zircon and Scheelite Phases of $DyVO_4$
    Autorzy:
    Ermakova, O.
    Paszkowicz, W.
    López-Solano, J.
    Muñoz, A.
    Dabkowska, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/1431671.pdf
    Data publikacji:
    2012-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.70.Hj
    61.43.Bn
    61.66.Fn
    Opis:
    Polycrystalline zircon-type dysprosium orthovanadate, $DyVO_4,$ prepared from a single crystal grown by slow cooling from $PbO//PbF_2$ flux, was studied by X-ray diffraction. Rietveld refinement provided the following unit cell size and oxygen atom coordinates: a=7.14811(4) Å; c=6.30825(4) Å, V=322.323(3) Å3, y($O^{2-}$)=0.4300(4); z($O^{2-}$)=0.2082(4) which are of a particularly high accuracy and show consistency with earlier reported values. Density functional theory calculations within the generalized gradient approximation for the exchange-correlation energy were also performed, providing values of structure parameters which differ by less than 2% from the experimental ones. The agreement between theory and experiment demonstrates the value of these calculations for understanding the structure of compounds of $RVO_4$ family. In addition, density functional theory calculations were performed for the scheelite-type $DyVO_4$; also for this polymorph the discrepancy with the only known set of lattice parameters is less than 2%. Values of oxygen atom coordinates have not been reported yet for this polymorph; here, the calculated ones are quoted.
    Źródło:
    Acta Physica Polonica A; 2012, 121, 4; 920-927
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Propagators in quantum mechanics
    Autorzy:
    Hernández-Galeana, A.
    Rivera-Rebolledo, J.
    López-Bonilla, J.
    López-Vázquez, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1177837.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Green’s functions
    Propagators in quantum mechanics
    Opis:
    We consider one-dimensional non-relativistic quantum mechanics to exhibit that the propagators (Green’s functions) for free particle, linear potential and harmonic oscillator, are obtainable from purely classical means.
    Źródło:
    World Scientific News; 2018, 99; 249-253
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Linear differential equations of second, third, and fourth order
    Autorzy:
    Hernández-Galeana, A.
    López-Bonilla, J.
    López-Vázquez, R.
    Vidal-Beltrán, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1167198.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Abel-Liouville-Ostrogradski identity
    Euler-Lagrange method
    Linear differential equation
    Opis:
    We study the linear differential equations of second, third, and fourth order, accepting to know solutions of the corresponding homogeneous equation, then we show how to obtain one more solution for the homogeneous case and a particular solution for the original equation.
    Źródło:
    World Scientific News; 2018, 105; 225-232
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Constraints and gauge relations in the Lagrangian formalism
    Autorzy:
    Lam-Estrada, P.
    López-Bonilla, J.
    López-Vázquez, R.
    Vidal-Beltrán, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1178075.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Gauge identities
    Genuine constraints
    Local symmetries
    Noether’s theorem
    Singular Lagrangians
    Opis:
    For several Lagrangians we show that their local symmetries can be obtained from the associated Euler-Lagrange equations, and we exhibit the explicit presence of the genuine constraints into gauge identities. We also employ the Lanczos approach to Noether’s theorem to give connections between the genuine constraints and their time derivatives. Besides, it is evident that the Hamiltonian secondary and tertiary constraints have relationship with the genuine constraints.
    Źródło:
    World Scientific News; 2018, 95; 215-223
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Maxwell-Lorentz Matrix
    Autorzy:
    Montiel-Pérez, J. Yaljá
    Pendleton, J.
    López-Bonilla, J.
    Vidal-Beltrán, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1177983.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Lorentz Group
    Lorentz transformations
    Maxwell equations
    Opis:
    Lorentz invariance of Maxwell electromagnetic equations is demonstrated in two complementary ways: first, we give a pedestrian review with three-vector equations, and we then express Maxwell equations in a four-vector matrix form (the Maxwell-Lorentz matrix) which demonstrates the intimate connection of Maxwell equations with the Lorentz group. Each Maxwell-Lorentz matrix component is the product of three matrices: a derivative matrix, a 4x4 Lorentz group generator matrix, and an electromagnetic field matrix. We obtain rotary Lorentz transformations of the electromagnetic field matrix from Lorentz equation matrices. We then transform the derivative and electromagnetic matrices and obtain an explicit matrix demonstration of Lorentz invariance of Maxwell equations. To obtain this result, we express all transformation matrices in exponential form to facilitate the application of simple Lorentz group algebra. The pedestrian approach illustrates what the Lorentz group matrix approach actually accomplishes and helps one to gain some appreciation of group theory methods.
    Źródło:
    World Scientific News; 2018, 96; 59-82
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On Stirling numbers
    Autorzy:
    Barrera-Figueroa, V.
    López-Bonilla, J.
    López-Vázquez, R.
    Vidal-Beltrán, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1177886.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Generalized chain rule of differentiation
    Hoppe’s formula
    Stirling and Bernoulli numbers
    Sums of powers of integers
    Opis:
    We exhibit an approach for the recursive formula obtained by Cereceda for the sums of powers of integers. Besides, we show that the definitions of Janjic for the Stirling numbers are consequences of the formulas of Hoppe and Quaintance-Gould.
    Źródło:
    World Scientific News; 2018, 98; 228-232
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Newman-Penrose’s formalism
    Autorzy:
    Lam-Estrada, P.
    López-Bonilla, J.
    López-Vázquez, R.
    Vidal-Beltrán, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1177969.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Identities of Bianchi
    Lanczos generator
    Newman-Penrose equations
    Weyl tensor
    Opis:
    We obtain the Newman-Penrose (NP) version of the Riemann tensor and the corresponding Bianchi identities. We also realize the NP transcription of the Weyl-Lanczos equations, and we emphasize that it is an open problem to find general solutions of this equations for the Petrov types I, II, and D, and to establish the possible physical meaning of the Lanczos potential.
    Źródło:
    World Scientific News; 2018, 96; 1-12
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Lanczos method
    Autorzy:
    Leija-Hernández, G.
    López-Bonilla, J.
    López-Vázquez, R.
    Vidal-Beltrán, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1178014.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Eigenvalue problem
    Lanczos algorithm
    Minimized iterations
    Opis:
    The Lanczos technique is one of the most frequently used numerical algorithms in matrix computations. We note that this procedure is one of the top 10 algorithms that exerted the greatest influence in the development and practice of science and engineering in the 20th century. Here we give an elementary exposition of this Lanczos method to solve the algebraic eigenvalue problem.
    Źródło:
    World Scientific News; 2018, 96; 208-216
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Vector field in the reciprocal space
    Autorzy:
    Torres-Silva, H.
    Barrera-Figueroa, V.
    López-Bonilla, J.
    Vidal-Beltrán, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1177958.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Reciprocal Space
    Spatial Fourier transformation
    Transverse and longitudinal δ-function
    Opis:
    As a preparation for the study of Maxwell equations under a spatial Fourier transform, we analyze properties of the transverse and longitudinal components of an arbitrary vector field in the reciprocal space.
    Źródło:
    World Scientific News; 2018, 97; 278-284
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Some applications of Noether’s theorem
    Autorzy:
    Montiel-Pérez, J. Yaljá
    López-Bonilla, J.
    López-Vázquez, R.
    Vidal-Beltrán, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1166045.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Complex Riemann-Silberstein vector
    Duality rotations
    Ignorable variable
    Invariance of the action
    Lanczos variational method
    Linear differential equation of second order
    Maxwell equations
    Noether’s theorem
    Variation of parameters
    Variational symmetry
    Opis:
    If the action S= ∫_(t_1)^(t_2)▒〖L(q,〗 (q,) ̇t) dt is invariant under the infinitesimal transformation t ̃=t+ε τ(q,t), q ̃_r= q_r+ε ξ_r (q,t),r=1,… ,n, with ε=constant ≪1, then the Noether’s theorem permits to construct the corresponding conserved quantity. The Lanczos approach employs to ε= q_(n+1) as a new degree of freedom, thus the Euler-Lagrange equation for this new variable gives the Noether’s constant of motion. Torres del Castillo and Rubalcava-García showed that each variational symmetry implies the existence of an ignorable coordinate; here we apply the Lanczos approach to the Noether’s theorem to motivate the principal relations of these authors. The Maxwell equations without sources are invariant under duality rotations, then we show that this invariance implies, via the Noether’s theorem, the continuity equation for the electromagnetic energy. Besides, we demonstrate that if we know one solution of p(x)y''+q(x)y'+r(x)y=0, then this Lanczos technique allows obtain the other solution of this homogeneous linear differential equation.
    Źródło:
    World Scientific News; 2018, 106; 69-80
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Identification of antimicrobial resistance genes in intestinal content from Coyote (Canis latrans)
    Autorzy:
    López-Islas, J.J.
    Méndez-Olvera, ET.
    Reyes C, T.
    Martínez-Gómez, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/16647515.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    antimicrobial resistance
    metagenome
    Canis latrans
    Opis:
    Antibiotic resistance has become a global public health concern in the last few years. Given the widespread rate of recurrence, increasing attention is being turned toward environmental pathways that potentially contribute to antibiotic resistance genes (ARGs) dissemination outside the clinical realm. In this study, a metagenome analysis of intestinal virus-like particle fraction (VLPs) from a wild coyote (Canis latrans) revealed for the first time, multiple ARGs, such as B-lactamases and multidrug efflux pumps. Description of ARGs presence in natural environments is critical to understand the emergence of resistant strains.
    Źródło:
    Polish Journal of Veterinary Sciences; 2023, 26, 1; 143-149
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The first record of Galba cubensis (L. Pfeiffer, 1839) (Mollusca: Gastropoda: Lymnaeidae) from open fields of Europe
    Autorzy:
    Schniebs, K.
    Gloer, P.
    Quinonero-Salgado, S.
    Lopez-Soriano, J.
    Hundsdoerfer, A.K.
    Powiązania:
    https://bibliotekanauki.pl/articles/83441.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Mikołaja Kopernika. Wydział Biologii i Ochrony Środowiska. Stowarzyszenie Malakologów Polskich
    Źródło:
    Folia Malacologica; 2018, 26, 1
    1506-7629
    Pojawia się w:
    Folia Malacologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    ReSySTER: A hybrid recommender system for Scrum team roles based on fuzzy and rough sets
    Autorzy:
    Colomo-Palacios, R.
    González-Carrasco, I.
    López-Cuadrado, J. L.
    García-Crespo, Á.
    Powiązania:
    https://bibliotekanauki.pl/articles/331282.pdf
    Data publikacji:
    2012
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    zbiór rozmyty
    zbiór przybliżony
    Scrum
    pakiet roboczy
    system polecenia
    fuzzy set
    rough set
    work package
    recommender system
    Opis:
    Agile development is a crucial issue within software engineering because one of the goals of any project leader is to increase the speed and flexibility in the development of new commercial products. In this sense, project managers must find the best resource configuration for each of the work packages necessary for the management of software development processes in order to keep the team motivated and committed to the project and to improve productivity and quality. This paper presents ReSySTER, a hybrid recommender system based on fuzzy logic, rough set theory and semantic technologies, aimed at helping project leaders to manage software development projects. The proposed system provides a powerful tool for project managers supporting the development process in Scrum environments and helping to form the most suitable team for different work packages. The system has been evaluated in a real scenario of development with the Scrum framework obtaining promising results.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2012, 22, 4; 801-816
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Laboratory of Natural Radiation (LNR) : a place to test radon instruments under variable conditions of radon concentration and climatic variables
    Autorzy:
    Quindós Poncela, L. S.
    Sainz Fernández, C.
    Gutiérrez-Villanueva, J.-L.
    Fuente Merino, I.
    Celaya González, C.
    Quindós López, L.
    Quindós López, J.
    Fernández Lopez, E.
    Fernández Villar, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/147764.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    active monitors
    interlaboratory comparison
    in-situ
    radon
    Opis:
    The publication of the new European Union Basic Safety Standards represents a remarkable milestone in the fi eld of radiological protection in terms of adding radon exposure to this framework. Therefore, the coming years will bring the need to measure radon not only in the workplaces but also in the living spaces as a direct outcome of the application of the new EU Directive. So, the importance of having reliable instruments is evident and interlaboratory exercises are becoming more and more popular. However, most of them are carried out under constant conditions of meteorological variables. We present in this paper a facility to broaden the interlaboratory comparisons further by adding the study of radon exposures under real conditions of changes in climatic parameters. In addition, the facility has the possibility to verify the response of radon monitors when the radon concentration changes several orders of magnitude in a short period of time. Our work shows some results of one of the interlaboratory exercises carried out in the premises, where the radon levels were rather homogeneous in the testing room.
    Źródło:
    Nukleonika; 2016, 61, 3; 275-280
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Importance of Internet And Online Social Networks in the Spanish Hotel Sector
    Autorzy:
    Infante-Moro, A.
    Infante-Moro, J-C.
    Martínez-López, F-J.
    García-Ordaz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/118135.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Promocji Wiedzy
    Tematy:
    hotels
    online social networks
    internet
    e-commerce
    cross-sectional study
    Opis:
    This paper is a cross-sectional study on the use of Internet and Online Social Networks in the Spanish hotel sector compared to Spanish companies in other sectors. The conclusions from this extensive survey are that the use of online social networks is more important and is more developed in the hotel sector than in Spanish companies in general. However, although it gives considerable importance to online social networks, the hotel sector needs to revise its rules of usage. The use of new tools such as e-commerce to sell the hotel stays must increase, and marketing efforts should be geared more towards online social networks because the hotel sector is currently losing ground in a market that generates more and more potential clients and sales by the day.
    Źródło:
    Applied Computer Science; 2016, 12, 1; 75-86
    1895-3735
    Pojawia się w:
    Applied Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Noether and matrix methods to construct local symmetries of Lagrangians
    Autorzy:
    Lam-Estrada, P.
    Ovando, G.
    López-Bonilla, J.
    López-Vázquez, R.
    Vidal-Beltrán, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1177899.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Gauge identities
    Local symmetries
    Noether theorem
    Singular Lagrangians
    Opis:
    We exhibit an elementary presentation of matrix and Noether techniques to construct infinitesimal point symmetries of Lagrangians. Besides, we employ the Lanczos approach to Noether’s theorem to obtain the first integral associated with each symmetry. We show applications to several singular Lagrangians of interest in classical mechanics.
    Źródło:
    World Scientific News; 2018, 97; 51-68
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spacetimes embedded into E6
    Autorzy:
    Montiel-Pérez, J. Yaljá
    Caltenco, J. H.
    Linares y M., R.
    López-Bonilla, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1164540.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    E6
    Embedding of Riemannian 4-spaces
    Local and isometric embedding
    Opis:
    We study the local and isometric embedding of Riemannian spacetimes into the pseudo-Euclidean flat E6. Our main purpose is to pinpoint the known results with the corresponding references, and to indicate the main routes and connections from here to the still open problems in the field. Some new results are also included in order to round off our discussion.
    Źródło:
    World Scientific News; 2018, 107; 31-45
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Participation of interferon type I during canine parvovirus infection
    Autorzy:
    Reyes-Cruz, T.
    Martínez-Gómez, D.
    Verdugo-Rodríguez, A.
    Bustos-Martínez, J.
    López-Islas, J.
    Méndez-Olvera, E.T.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087108.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    canine parvovirus
    antiviral immunity
    IFNβ
    viral pathogenesis
    Źródło:
    Polish Journal of Veterinary Sciences; 2021, 24, 3; 375-384
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    High performance quantum key distribution prototype system using a commercial off-the-shelf solution: experimental and emulation demonstrations
    Autorzy:
    Lopez-Leyva, J. A.
    Ruiz-Higuera, J.
    Arvizu-Mondragon, A.
    Santos-Aguilar, J.
    Ramos-Garcia, R.
    Ponce-Camacho, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/174150.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    quantum cryptography
    final secret key rate
    FSecKR
    coherent states
    Opis:
    A continuous variable-quantum key distribution system prototype that uses weak coherent states with a diffused phase, commercial off-the-shelf devices, complete free space 90-degrees hybrid and simplified quantum protocol is proposed in this paper. In general, the quantum transmitter-receiver shows an experimental average quantum bit error rate of 30% using auto-homodyne detection with 0.25 photons per pulse in locking phase mode. The emulated final secret key rate measurements were 20 and 40 Kbps for minimum (30 Mbps) and maximum (90 Mbps) throughput, respectively, in a real traffic network using databases for the quantum keys generated by two true random number generators.
    Źródło:
    Optica Applicata; 2017, 47, 3; 411-419
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dual regulation of cytosolic ascorbate peroxide (APX) by tyrosine nitration and S-nitrosylation
    Autorzy:
    Begara-Morales, J.
    Sanchez-Calvo, B.
    Chaki, M.
    Valderrama, R.
    Mata-Perez, C.
    Lopez-Jaramillo, J.
    Carreras, A.
    Padilla, M.
    Corpas, F.
    Barroso, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/80378.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    conference
    post-translational modification
    nitric oxide
    target protein
    ascorbate peroxidase
    tyrosine nitration
    S-nitrosylation
    salinity stress
    Źródło:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 2
    0860-7796
    Pojawia się w:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structure, Morphology and Electrical Properties of CaTiO3 Ceramics Synthesized by the Solid-State Reaction Method
    Autorzy:
    Rocha-Rangel, E.
    López-Hernández, J.
    Castillo-Martínez, J. A.
    Osorio-Ramos, J. J.
    Calles-Arriaga, C. A.
    Estrada-Guel, I.
    Martínez-Sánchez, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/352238.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    CaTiO3
    solid state synthesis
    electrical properties
    insulating ceramics
    Opis:
    In this paper, explain the preparation of CaTiO3 ceramics synthesized by the solid-state reaction method. Calcium carbonate and titanium dioxide were high energy mixed in stoichiometric amounts, and the obtained mixture was calcined at different temperatures (800, 900, 1000 and 1300ºC) for 2h. The obtained samples were characterized by measurement of particle size, Energy Dispersive X-Ray (EDX) Analysis; differential thermal analysis, X-ray diffraction and SEM images. XRD patterns indicated that CaTiO3 ceramics with the structure of perovskite is obtained from calcined powders at 1,300°C for 2h. SEM images show the formation of a very fine and homogeneous morphology. The measured values of electrical resistivity were within the typical range of insulating materials and approach values corresponding to insulating ceramics.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 4; 1749-1753
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Youngest agamid lizards from Western Europe (Sierra de Quibas, Spain, late Early Pleistocene)
    Autorzy:
    Blain, H.-A.
    Bailon, S.
    Agusti, J.
    Pinero-Garcia, P.
    Lozano-Fernandez, I.
    Sevilla, P.
    Lopez-Garcia, J.M.
    Sanchez, G.R.
    Mancheno, M.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/21138.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Opis:
    Here we report a new Early Pleistocene record of agamid lizards (Agamidae indet.) from the Spanish locality of Quibas (ca. 1.3–1.0 Ma), which represents the latest evidence of the family in Western Europe. Up to now, the family Agamidae was considered to have disappeared in this region at 1.8 Ma. This new record implies the survival of agamid lizards for a large part of the Early Pleistocene in the southernmost Iberian Peninsula, probably because of favourable climatic and environmental conditions. Consequently, the formerly detected Pliocene / Pleistocene boundary is no longer recognisable in the evolution of the herpetological assemblages in Western Europe.
    Źródło:
    Acta Palaeontologica Polonica; 2014, 59, 4
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Artificial Intelligence Approaches to Fault Diagnosis for Dynamic Systems
    Autorzy:
    Patton, R. J.
    Lopez-Toribio, C. J.
    Uppal, F. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/908290.pdf
    Data publikacji:
    1999
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    metoda sztucznej inteligencji
    rozpoznanie błędu
    modelowanie rozmyte
    system rozmyty
    artificial intelligence methods
    fault diagnosis
    residual generation
    fuzzy modelling
    neuro-fuzzy systems
    Opis:
    Recent approaches to fault detection and isolation (FDI) for dynamic systems using methods of integrating quantitative and qualitative model information, based upon artificial intelligence (AI) techniques are surveyed. In this study, the use of AI methods is considered an important extension to the quantitative model-based approach for residual generation in FDI. When quantitative models are not readily available, a correctly trained artificial neural network (ANN) can be used as a non-linear dynamic model of the system. However, the neural network does not easily provide insight into model behaviour; the model is explicit rather than implicit in form. This main difficulty can be overcome using qualitative modelling or rule-based inference methods. For example, fuzzy logic can be used together with state-space models or neural networks to enhance FDI diagnostic reasoning capabilities. The paper discusses the properties of several methods of combining quantitative and qualitative system information and their practical value for fault diagnosis of real process systems.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 1999, 9, 3; 471-518
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Early steps in the radiation of notoungulate mammals in southern South America: A new henricosborniid from the Eocene of Patagonia
    Autorzy:
    Bauza, N.
    Gelfo, J.N.
    Lopez, G.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/22004.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Opis:
    Here we describe a new notoungulate mammal from the early Eocene (Itaboraian SALMA) of Chubut, Argentinian Patagonia, from the localities of Las Flores and Las Violetas Farm, represented by fragments of maxilla and isolated teeth. The specimens were found in the Las Flores Formation, Río Chico Group, and assigned to the Henricosborniidae, a primitive family within the order Notoungulata. Orome deepi gen. et. sp. nov. differs from other henricosborniids in a less developed metacone column in the upper molars, a larger metaloph in the third upper molar and a larger mean size. The morphometric analysis does not show any difference between the individuals of the two studied localities. The new addition to the henricosborniid diversity in Patagonia allows to provide a better understanding of the early radiation of notoungulates in South America.
    Źródło:
    Acta Palaeontologica Polonica; 2019, 64, 3
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modelling the effects of land use changes on runoff and soil erosion in two Mediterranean catchments with active gullies (South of Spain)
    Autorzy:
    Martínez-Murillo, J. F.
    López-Vicente, M.
    Poesen, J.
    Ruiz-Sinoga, J. D.
    Powiązania:
    https://bibliotekanauki.pl/articles/294673.pdf
    Data publikacji:
    2011
    Wydawca:
    Stowarzyszenie Geomorfologów Polskich
    Tematy:
    gully erosion
    land use
    RMMF
    model
    runoff
    soil erosion
    Opis:
    This study investigates the effects of land use changes between 1956 and 2006 on runoff and soil erosion in two Mediterranean catchments (South Spain)with active gullies, by applying the RMMF Model and by comparing the erosion channel network from both years. Results underline the complexity of soil erosion dynamics in gullied catchments where a general increase in soil erosion due to land use changes can occur simultaneously with a decrease in erosion rates within the gully system.
    Źródło:
    Landform Analysis; 2011, 17; 99-104
    1429-799X
    Pojawia się w:
    Landform Analysis
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Radiocatalytic degradation of dissolved organic compounds in wastewater
    Autorzy:
    Jiménez-Becerril, J.
    Moreno-López, A.
    Jiménez-Reyes, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/148022.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    wastewater
    dissolved organic carbon
    radiocatalysis
    Opis:
    Wastewater containing a high concentration of organic substances was exposed to gamma radiolysis in the presence and absence of a catalyst (TiO2); radiolysis and radiocatalysis were performed by means of continuous and discontinuous irradiation. Dissolved organic carbon (DOC) was the parameter used to estimate the concentration of organic compounds without interference by the high mineral content. The data was well fitted to the pseudo-first-order kinetic model of Langmuir-Hinshelwood. From a [DOC]0 = 140 ± 7 mg/L, the higher DOC degradation (74%) and apparent rate constant (Kapp = 0.083 h−1) were found using discontinuous radiocatalysis. This process could be an alternative method of treatment of industrial or municipal wastewater.
    Źródło:
    Nukleonika; 2016, 61, 4; 473-476
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of the friction coefficients of chestnut (Castanea sativa Mill.) sawn timber
    Autorzy:
    Villar-Garcia, J.R.
    Vidal-Lopez, P.
    Corbacho, A.J.
    Moya, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2082657.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    wood
    mechanical properties
    friction coefficient
    direct shear test
    Opis:
    This work provides the values of both the static and the kinetic friction coefficients for chestnut (Castanea sativa Mill.) of Spanish origin. Knowledge concerning these coefficients has its main application in the study of agroindustrial structures and machinery with timber members in contact. This determination was developed taking into account the timber anisotropy to establish surfaces and directions of slipping. A modified direct shear test device was used to conduct the tests and reproduce the tribological system. This procedure was functional and reliable and considered suitable for standardizing the friction measurement between timber surfaces, since this device is widely distributed in geotechnical and materials laboratories and the European codes do not specify a procedure or device to carry it out. The average values obtained were 0.46 for the static coefficient and 0.33 for the kinetic one, without considering the surfaces and directions of slipping. These values ranged between 0.36 and 0.55 for the static friction coefficient and between 0.28 and 0.39 for the kinetic friction coefficient depending on the direction considered and also taking into account the anisotropy of the timber. A good correlation was obtained between both coefficients, thus allowing for the estimation of the kinetic coefficient from the static one.
    Źródło:
    International Agrophysics; 2020, 34, 1; 65-77
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnesium biodegradable implants coated with polylactic acid
    Autorzy:
    Munoz, M.
    Rams, J.
    Lopez, A.
    Matykina, E.
    Torres, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/284077.pdf
    Data publikacji:
    2017
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
    Tematy:
    implants
    biodegradation
    magnesium alloys
    Źródło:
    Engineering of Biomaterials; 2017, 20, no. 143 spec. iss.; 28
    1429-7248
    Pojawia się w:
    Engineering of Biomaterials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Exact and heuristic approaches to solve the Internet shopping optimization problem with delivery costs
    Autorzy:
    Lopez-Loces, M. C.
    Musial, J.
    Pecero, J. E.
    Fraire-Huacuja, H. J.
    Blazewicz, J.
    Bouvry, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/330508.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    internet shopping optimization
    integer linear programming
    cellular processing algorithm
    heuristic algorithms
    optimization in e-commerce
    zakupy internetowe
    programowanie liniowe
    algorytm heurystyczny
    handel elektroniczny
    Opis:
    Internet shopping has been one of the most common online activities, carried out by millions of users every day. As the number of available offers grows, the difficulty in getting the best one among all the shops increases as well. In this paper we propose an integer linear programming (ILP) model and two heuristic solutions, the MinMin algorithm and the cellular processing algorithm, to tackle the Internet shopping optimization problem with delivery costs. The obtained results improve those achieved by the state-of-the-art heuristics, and for small real case scenarios ILP delivers exact solutions in a reasonable amount of time.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2016, 26, 2; 391-406
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Algorithms solving the Internet shopping optimization problem with price discounts
    Autorzy:
    Musial, J.
    Pecero, J. E.
    Lopez-Loces, M. C.
    Fraire-Huacuja, H. J.
    Bouvry, P.
    Blazewicz, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/200209.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    e-commerce
    Internet shopping
    applications of operations research
    approximations
    algorithms
    heuristics
    combinatorial optimization
    zakupy przez Internet
    wnioski z badań operacyjnych
    aproksymacje
    algorytmy
    heurystyki
    optymalizacja kombinatoryczna
    Opis:
    The Internet shopping optimization problem arises when a customer aims to purchase a list of goods from a set of web-stores with a minimum total cost. This problem is NP-hard in the strong sense. We are interested in solving the Internet shopping optimization problem with additional delivery costs associated to the web-stores where the goods are bought. It is of interest to extend the model including price discounts of goods. The aim of this paper is to present a set of optimization algorithms to solve the problem. Our purpose is to find a compromise solution between computational time and results close to the optimum value. The performance of the set of algorithms is evaluated through simulations using real world data collected from 32 web-stores. The quality of the results provided by the set of algorithms is compared to the optimal solutions for small-size instances of the problem. The optimization algorithms are also evaluated regarding scalability when the size of the instances increases. The set of results revealed that the algorithms are able to compute good quality solutions close to the optimum in a reasonable time with very good scalability demonstrating their practicability.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2016, 64, 3; 505-516
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Recurrent Constructional Pattern of the Crustacean Burrow Sinusichnus sinuosus from the Paleogene and Neogene of Spain
    Autorzy:
    Belaustegui, Z.
    de Gibert, J.M.
    Lopez-Blanco, M.
    Bajo, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/946033.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    decapoda
    sinusichnus sinuosus
    bioturbation
    eocene
    miocene
    pliocene
    Opis:
    New occurrences of Sinusichnus sinuosus described in the Cenozoic of Spain evidence the almost continuous fossil record of this ichnospecies from the Upper Cretaceous to the Lower Pliocene. Morphological and size features of these highly regular sinusoidal burrows have been analyzed, showing a very recurrent constructional pattern through time. Such features are also constant along the ontogeny of the producer. The large number of similarities that this ichnogenus shares with fodinichnial burrow systems, such as Thalassinoides, Ophiomorpha, or Spongeliomorpha, point to a crustacean authorship. Since this sinusoidal architecture is also common among some graphoglyptids, other behavioral strategies are discussed. The ichnogenus Sinusichnus occurs commonly in shallow marine environments, in particular to deltaic depositional settings.
    Źródło:
    Acta Palaeontologica Polonica; 2014, 59, 2; 461-474
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Using tags in an AIML-based chatterbot to improve its knowledge
    Autorzy:
    Mikic, F. A.
    Burguillo, J. C.
    Peleteiro, A.
    Rey-Lopez, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/305303.pdf
    Data publikacji:
    2012
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    AIML
    chatterbots
    folksonomies
    tagging
    natural language
    Opis:
    Nowadays, it is common to find on the Internet different conversational robots which interact with users simulating a natural language conversation. Among them, we can emphasize the chatterbots based on AIML language. In this paper we present an AIML based chatterbot that shows as its main contribution the use of tags and folksonomies. Thanks to its use, we can generate a context for each conversation, being able to maintain a state for each user in the system, and improving the adaptation capabilities of the bot.
    Źródło:
    Computer Science; 2012, 13 (2); 123-133
    1508-2806
    2300-7036
    Pojawia się w:
    Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    100G shortwave wavelength division multiplexing solutions for multimode fiber data links
    Autorzy:
    Cimoli, B.
    Estaran Tolosa, J. M.
    Rodes Lopez, G. A.
    Vegas Olmos, J. J.
    Monroy, I. T.
    Powiązania:
    https://bibliotekanauki.pl/articles/173811.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    vertical-cavity surface-emitting laser (VCSEL)
    multimode fiber
    MMF
    wavelength division multiplexing
    WDM
    Opis:
    We investigate an alternative 100G solution for optical short-range data center links. The presented solution adopts wavelength division multiplexing technology to transmit four channels of 25G over a multimode fiber. A comparative performance analysis of the wavelength-grid selection for the wavelength division multiplexing data link is reported. The analysis includes transmissions over standard optical multimode fiber (OM): OM2, OM3 and OM4.
    Źródło:
    Optica Applicata; 2016, 46, 3; 409-419
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hydrogen Assisted Cracking in a Microalloyed Steel Subjected to a Rapid Thermal Cycle at High Temperature
    Autorzy:
    Lopez-Martinez, E.
    Vázquez-Gómez, O.
    Vergara-Hernández, H. J.
    Campillo, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/352035.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    persistent slip mark
    fatigue crack growth
    hydrogen enhanced local plasticity
    microalloyed steel
    Opis:
    In a martensitic-bainitic microalloyed steel, the effect of hydrogen on fatigue crack growth was studied using rotary bending fatigue tests. The steel was subjected to a rapid thermal cycle to get a microstructure similar to that which would be formed within the coarse-grained heat-affected zone of a weld. Crack growth was monitored as a function of the number of cycles applied during fatigue tests on three types of specimens: 1) those without hydrogen charge, 2) those charged with hydrogen and 3) those charged with hydrogen which was then discharged through low-temperature heat treatment. All types showed persistent slip marks, and cracks propagated along high-shear-stress planes. In the presence of hydrogen, crack growth was affected by microstructural defects caused by the hydrogen charging process, and the persistent slip marks developed in an area closer to the crack tip and crack path. On the contrary, without hydrogen, crack growth occurred perpendicular to the applied force, and the persistent slip marks were fewer in number and further from the crack tip and crack path. This indicates that the plasticity increased (i.e., the damage that occurred in the presence of hydrogen matched the hydrogen-enhanced local plasticity mechanism).
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 1; 315-321
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Support to maritime and inland waterways service providers for the transmission of EGNOS Corrections via IALA beacons and AIS/VDES stations
    Autorzy:
    López, M.
    Cano, M.
    Martínez, R.
    Álvarez, C.
    Tavira, L.
    Morán, J.
    Antón, V.
    Vázquez, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/117535.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    inland waterways
    IALA beacons
    AIS stations
    VDES stations
    EGNOS
    EGNOS corrections
    AIS Service Manager (ASM)
    Virtual Reference Station (VRS)
    Opis:
    The use of SBAS corrections for navigation, in both coastal waters and inland waterways, has already brought the attention of many European authorities, which are interested in its potential to complement/replace their DGPS radio beacon networks. The European GNSS Agency (GSA) has an active long-term trajectory working to foster the EGNOS adoption in maritime through the launch of several actions whose results will pave the way for the provision of maritime EGNOS services. In this line, GSA awarded the consortium ALG-Indra, ESSP and Alberding with the Specific Contract GSA/OP/07/13/SC24 ‘Support to Maritime Service Providers for the transmission of EGNOS corrections via IALA beacons and AIS/VDES stations’. The main objective of this Specific Contract is to demonstrate the operational performance of the transmission of EGNOS corrections converted to Differential GPS corrections over the existing transmission infrastructure (AIS base stations/IALA beacons) in the Maritime and Inland Waterways (IWW) domains, while providing a detailed cost benefit analysis of the solutions proposed. This service may complement the current GNSS augmentation services exploiting synergies and benefiting from the current infrastructure and standards, facilitating the adoption of EGNOS by maritime and inland waterways authorities. Furthermore, the service has no impact at user level since the DGNSS corrections are transmitted over the existing infrastructure, in the same format and implementing the same integrity mechanisms required for traditional IALA beacons ([1]). This project will allow the maritime and IWW service providers to have a clear understanding about the technical, operational and economic feasibility of the transmission of EGNOS corrections via IALA beacons and AIS/VDES stations.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2019, 13, 1; 45-52
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characterization of sub-channel based Málaga atmospheric optical links with real β parameter
    Autorzy:
    López-González, F. J.
    Jurado-Navas, A.
    Garrido-Balsells, J. M.
    Castillo-Vázquez, M.
    Puerta-Notario, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/174807.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    Malaga distribution
    generalized-K distribution
    atmospheric optical communications
    atmospheric propagation
    atmospheric turbulence
    scintillation
    Opis:
    A generalization of the Málaga atmospheric optical communications links treated as a finite number of generalized-K distributed sub-channels is analyzed in terms of outage probability and outage rate when its β parameter belongs to the set of real numbers. To the best of the author’s knowledge, this is the first time that β ∈ ℜ is considered. The new analytical expressions derived in this paper lead to a new physical and more realistic interpretation of atmospheric optical links, especially in terms of performance.
    Źródło:
    Optica Applicata; 2017, 47, 4; 545-556
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of the JWL Constants for ANFO and Emulsion Explosives from Cylinder Test Data
    Autorzy:
    Sanchidrián, J. A.
    Castedo, R.
    López, L. M.
    Segarra, P.
    Santos, A. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/358385.pdf
    Data publikacji:
    2015
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    cylinder test
    JWL equation of state
    LS-DYNA
    ANFO
    emulsion explosives
    Opis:
    The Jones-Wilkins-Lee (JWL) equation of state parameters for ANFO and emulsion-type explosives have been obtained from cylinder test expansion measurements. The calculation method comprises a new radial expansion function, with a non-zero initial velocity at the onset of the expansion in order to comply with a positive Gurney energy at unit relative volume, as the isentropic expansion from the CJ state predicts. The equations reflecting the CJ state conditions and the measured expansion energy were solved for the JWL parameters by a non-linear least squares scheme. The JWL parameters of thirteen ANFO and emulsion type explosives have been determined in this way from their cylinder test expansion data. The results were evaluated through numerical modelling of the tests with the LS-DYNA hydrocode; the expansion histories from the modelling were compared with the measured ones, and excellent agreement was found.
    Źródło:
    Central European Journal of Energetic Materials; 2015, 12, 2; 177-194
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Robust sensor fault estimation for descriptor-LPV systems with unmeasurable gain scheduling functions: Application to an anaerobic bioreactor
    Autorzy:
    López-Estrada, F. R.
    Ponsart, J. C.
    Theilliol, D.
    Astorga-Zaragoza, C. M.
    Camas-Anzueto, J. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/331392.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    fault diagnosis
    fault estimation
    LPV systems
    observer design
    descriptor system
    diagnostyka uszkodzeń
    estymacja błędu
    obserwator
    układ deskryptorowy
    Opis:
    This paper addresses the design of a state estimation and sensor fault detection, isolation and fault estimation observer for descriptor-linear parameter varying (D-LPV) systems. In contrast to where the scheduling functions depend on some measurable time varying state, the proposed method considers the scheduling function depending on an unmeasurable state vector. In order to isolate, detect and estimate sensor faults, an augmented system is constructed by considering faults to be auxiliary state vectors. An unknown input LPV observer is designed to estimate simultaneously system states and faults. Sufficient conditions to guarantee stability and robustness against the uncertainty provided by the unmeasurable scheduling functions and the influence of disturbances are synthesized via a linear matrix inequality (LMI) formulation by considering H∞ and Lyapunov approaches. The performances of the proposed method are illustrated through the application to an anaerobic bioreactor model.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2015, 25, 2; 233-244
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Construction of the nest of Amazilia rutila De Lattre (Trochillidae) and its anti-predatory defensive strategy in a medium deciduous forest in Campeche, Mexico
    Autorzy:
    López-Castilla, Héctor M.J.
    Ríos-Oviedo, Ángel
    Cetzal-Ix, William
    Basu, Saikat Kumar
    Powiązania:
    https://bibliotekanauki.pl/articles/2176775.pdf
    Data publikacji:
    2019-12-31
    Wydawca:
    Uniwersytet Pedagogiczny im. Komisji Edukacji Narodowej w Krakowie
    Tematy:
    Asclepias curassavica
    Cnidoscolus aconitifolius
    hummingbird
    Mangifera indica
    Yucatan peninsula
    koliber
    Półwysep Jukatan
    Opis:
    The Yucatan peninsula (YP) is part of a biogeographical area characterised by its diversity of flora and fauna, among which are the birds, mainly hummingbirds, which are indicators of the state of conservation of the ecosystems. In birds, the site establishment and construction of nest plays a fundamental role for reproduction and survival rate, the selection of materials occurs opportunistically, but birds tend to use fresh leaves of plants with antimicrobial properties or that allow the depletion of ectoparasites in their nests. In this sense, for the first time we recorded for the cinnamon hummingbird (Amazilia rutila De Lattre), the materials used for the construction of its nest and the site of establishment of the nest in the host plants in two sites of a medium sub-deciduous forest in, Mexico. We recorded the construction of nests of A. rutila in two locations in Campeche; in the first site the nest was found in a chaya bush Cnidoscolus aconitifolius (Mill.) I.M. Johnst. (Euphorbiaceae); most possibly as an anti-predatory strategy for trichomes in the form of sharp hairs and spines that the plants possess in their stems and leaves. In the second site, the nest was found in a mango tree Mangifera indica L. (Anacardiaceae). The main vegetative material identified for the construction of the nests in both locations, were made from pappus (thin and cottony filament that possess the seeds for the dispersion) from Asclepias curassavica L. (Apocynaceae).
    Półwysep Jukatan (YP) jest częścią obszaru biogeograficznego charakteryzującego się różnorodnością flory i fauny. Wśród fauny licznie występują ptaki, głównie kolibry, będące wskaźnikami stanu zachowania ekosystemów. Dla ptaków zakładanie i budowa gniazda odgrywa podstawową rolę w rozmnażaniu i przeżywalności. Wybór materiałów na gniazda odbywa się oportunistycznie, ale ptaki zwykle używają świeżych liści, o właściwościach rzeciwdrobnoustrojowych lub pozwalających na odstraszenie pasożytów zewnętrznych z ich gniazd. W tym kontekście, dla kolibra cynamonowego (Amazilia rutila De Lattre) po raz pierwszy opisaliśmy materiały użyte do budowy gniazda oraz miejsce założenia gniazda w roślinach żywicielskich, w dwóch lokalizacjach lasu liściastego w Meksyku. Obserwowaliśmy budowę gniazd A. rutila w dwóch lokalizacjach w Campeche. W pierwszym miejscu gniazdo znaleziono w zaroślach Chaya Cnidoscolus aconitifolius (Mill.) I.M. Johnst. (Euphorbiaceae); ostre włoski i kolce, które mają rośliny z tego rodzaju na swoich łodygach i liściach, najprawdopodobniej występują tu jako anty-drapieżna strategia dla włosieni. W drugim miejscu gniazdo znaleziono na drzewie mango Mangifera indica L. (Anacardiaceae). Główny materiał roślinny zidentyfikowany do budowy gniazd w obu lokalizacjach został wykonany z puchu – pappus (cienkiego i bawełnianego filamentu służącego do dyspersji nasion) z Asclepias curassavica L. (Apocynaceae).
    Źródło:
    Annales Universitatis Paedagogicae Cracoviensis Studia Naturae; 2019, 4; 67-77
    2543-8832
    2545-0999
    Pojawia się w:
    Annales Universitatis Paedagogicae Cracoviensis Studia Naturae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cuban consumer price index forecasting through transformer with attention
    Autorzy:
    Rosado, Reynaldo
    Toledano-López, Orlando G.
    González, Hector R.
    Abreu, Aldis J.
    Hernandez, Yanio
    Powiązania:
    https://bibliotekanauki.pl/articles/27314241.pdf
    Data publikacji:
    2023
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    consumer price index
    time series forecasting
    transformer with attention
    ARIMA
    LSTM
    Opis:
    Recently, time series forecasting modelling in the Con‐ sumer Price Index (CPI) has attracted the attention of the scientific community. Several research projects have tackled the problem of CPI prediction for their countries using statistical learning, machine learning and deep neural networks. The most popular approach to CPI in several countries is the Autoregressive Integrated Mov‐ ing Average (ARIMA) due to the nature of the data. This paper addresses the Cuban CPI forecasting problem using Transformer with attention model over univariate dataset. The fine tuning of the lag parameter shows that Cuban CPI has better performance with small lag and that the best result was in = 1. Finally, the comparative results between ARIMA and our proposal show that the Transformer with attention has a very high performance despite having a small data set.
    Źródło:
    Journal of Automation Mobile Robotics and Intelligent Systems; 2023, 17, 2; 12--17
    1897-8649
    2080-2145
    Pojawia się w:
    Journal of Automation Mobile Robotics and Intelligent Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A posteriori error estimates for beams with inexact flexural stiffness representation
    Autorzy:
    Torii, André J.
    Gracite, Paula M.A.
    Miguel, Leandro F.F.
    Lopez, Rafael H.
    Powiązania:
    https://bibliotekanauki.pl/articles/24201505.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
    Tematy:
    beam
    error estimate
    inexact stiffness
    belka
    oszacowanie błędów
    Opis:
    In this work, we present a posteriori error estimates for the Euler-Bernoulli beam theory with inexact flexural stiffness representation. This is an important subject in practice because beams with non-uniform flexural stiffness are frequently modeled using a mesh of elements with constant stiffness. The error estimates obtained in this work are validated by means of two numerical examples. The estimates presented here can be employed for adaptive mesh refinement.
    Źródło:
    Journal of Applied Mathematics and Computational Mechanics; 2023, 22, 2; 62--74
    2299-9965
    Pojawia się w:
    Journal of Applied Mathematics and Computational Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A nonlinear model for the elastoplastic analysis of 2D frames accounting for damage
    Nieliniowy model do sprężysto-plastycznej analizy problemu uszkodzeń dwuwymiarowych ram
    Autorzy:
    Lorenzana, A.
    López-Reyes, P. M.
    Chica, E.
    Teran, J. M. G.
    Cacho, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/281011.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
    Tematy:
    plastic methods
    structural analysis
    material nonlinearities
    elastoplastic stiffness matrix
    Bonora damage model
    Opis:
    A simple and efficient procedure for non-linear analysis of frames is presented, under the hypothesis that the non-linear effects, if appear, are concentrated in the beam-ends.We consider a damage model based on Continuum Damage Mechanics, but affecting the cross-section as a whole. The elastoplastic behaviour is included formulating the tangent elastoplastic stiffness matrix in such a way that the yield function, in terms of internal forces (axial, shear and bending moment), is affected by the damage in each plastic cross-section. After the verification of the model, an example of application is solved for different assumptions on the yield function (depending on the internal forces considered) with the damage being taken into account or disregarded. The differences on the collapse load, for each case, are shown and some conclusions obtained, among them that the method can evaluate in a more accurate way the load that causes the collapse of frames under increasing loading, considering a fully plastic non-linear analysis.
    W pracy zaprezentowano prostą i skuteczną metodę nieliniowej analizy dwuwymiarowych ram przy założeniu hipotezy, że efekty nieliniowe, jeśli występują, są skoncentrowane na końcach belek tworzących układ ramy. Rozważono kontynualny model procesu zniszczenia obejmujący przekrój belki jako całość. Właściwości elasto-sprężyste materiału ujęto poprzez zdefiniowanie macierzy stycznej sztywności sprężysto-plastycznej w taki sposób, że funkcja uplastycznienia wyrażona w kategoriach obciążeń wewnętrznych (sił osiowych, tnących oraz momentu gnącego) zależy od stanu zniszczenia w każdym uplastycznionym przekroju. Po zweryfikowaniu modelu, rozwiązano przykład zastosowania analizy dla różnych założeń narzuconych na funkcję uplastycznienia (w zależności od wziętych pod uwagę obciążeń wewnętrznych) z uwzględnieniem zniszczenia lub bez. Dla każdego przypadku pokazano różnice w wartościach obciążenia zewnętrznego prowadzącego do wyboczenia ramy oraz sformułowano wnioski. Wykazano, że przedstawiona metoda nieliniowej analizy uplastycznienia pozwala na bardziej precyzyjne określenie krytycznych obciążeń prowadzących do zniszczenia konstrukcji.
    Źródło:
    Journal of Theoretical and Applied Mechanics; 2011, 49, 2; 515-529
    1429-2955
    Pojawia się w:
    Journal of Theoretical and Applied Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Life cycle cost assessment and economic analysis of a decentralized wastewater treatment to achieve water sustainability within the framework of circular economy
    Autorzy:
    López-Serrano, María J.
    Lakho, Fida Hussain
    Van Hulle, Stijn W. H.
    Batlles-delaFuente, Ana
    Powiązania:
    https://bibliotekanauki.pl/articles/19322748.pdf
    Data publikacji:
    2023
    Wydawca:
    Instytut Badań Gospodarczych
    Tematy:
    wastewater
    economic analysis
    LCCA
    Sustainable Development Goals
    monetary evaluation
    Opis:
    Research background: The increasing water demand together with an unceasing production of wastewater worldwide has resulted in a situation where the scarcity and pollution of water resources are jeopardizing and depleting such a vital asset. Purpose of the article: In this context, Nature Based Solutions (NBS) such as Vertical Flow Constructed Wetlands (VFCWs) are key because of their capacity of channelling a waste into a resource. However, and notwithstanding their essential role, their financial benefits too often go unnoticed because of missing research that study them from an economic perspective and this article has covered this existing gap. The objective of this research is to analyse the economic consequences of using VFCW against its traditional alternative through a comprehensive economic assessment. Methods: After doing a Life Cycle Assessment (LCA), a combination of two approaches has been carried out. This research has developed a holistic approach where a Life Cycle Cost Assessment (LCCA) based on a Cost Benefit Analysis (CBA) along with an economic evaluation of cleaning environmental costs have been calculated for two different scenarios. For this monetary analysis, the environmental externalities derived from the use of cleaning the pollution caused by a public water supply and sewerage system and the VFCW have been quantified. Findings & value added: Results conclude that VFCW apart of being a cost-effective and profitable alternative for an investor, it has also valuable benefits for the society in general because of its meaningful and positive externalities and the high removal cost of the environmental pollutants of the traditional water supply and sewage system both contributing directly to the achievement of Sustainable Development Goals (SDGs). Furthermore, 4/5 environmental impacts derived from the use of traditional alternative pollute more than twice as much as the VFCW does. Lastly, the cleaning costs difference between both alternatives is 1,984,335€.
    Źródło:
    Oeconomia Copernicana; 2023, 14, 1; 103-133
    2083-1277
    Pojawia się w:
    Oeconomia Copernicana
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Environmental distribution of post-Palaeozoic crinoids from the Iberian and south-Pyrenean basins, NE Spain
    Autorzy:
    Zamora, S.
    Aurell, M.
    Veitch, M.
    Saulsbury, J.
    Lopez-Horgue, M.A.
    Ferratges, F.A.
    Arz, J.A.
    Baumiller, T.K.
    Powiązania:
    https://bibliotekanauki.pl/articles/22586.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Opis:
    Post-Palaeozoic crinoids from northeast Spain ranging from the Ladinian (Middle Triassic) to the Ilerdian (lower Ypresian, early Eocene) are documented. Here we provide the first attempt to reconstruct the environmental distribution of these crinoids based on relatively complete material (mostly cups). Triassic forms are dominated by encrinids from outer carbonate ramps. Late Jurassic crinoids are dominated by cyrtocrinids, comatulids, millericrinids, and isocrinids, occurring either on sponge mounds and meadows or on soft substrates within middle to outer carbonate ramps. Aptian (Early Cretaceous) forms include nearly complete isocrinids which are found in extremely shallow environments represented by bioclastic carbonates and interspersed oyster-rich layers. Other Aptian occurrences come from more distal and deep environments and are composed solely of comatulids. Albian forms are dominated by cyrtocrinids and isocrinids associated with coral reefs. Late Cretaceous and Eocene crinoids include mostly bourgueticrinids (Comatulida) that are found either in outer ramp facies or associated with mid-ramp reef complexes. The later corresponds to one of the shallowest occurrence of bourgueticrinids in the Cenozoic. The palaeoecological data for fossil crinoids of northeast Spain contributes to reconstructing the history of the bathymetric distribution of articulate crinoids, supporting the idea that stalked crinoids were able to inhabit a wide range of shallow marine environments in the late Mesozoic and early Cenozoic.
    Źródło:
    Acta Palaeontologica Polonica; 2018, 63, 4
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Polyphenolic composition of Spanish cultivars of globe artichoke (Cynara cardunculus L. var. scolymus (L.) Fiori)
    Autorzy:
    Pérez-Esteve, É.
    Sałata, A.
    Barat, J.M.
    Stępniowska, A.
    López-Galarza, S.
    Nurzyńska-Wierdak, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/11897335.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Tematy:
    plant cultivation
    cardoon
    Cynara cardunculus
    polyphenolic composition
    Opal cultivar
    Concerto cultivar
    Symphony cultivar
    Madrigal cultivar
    Blanca de Tudela cultivar
    A-106 cultivar
    herbal plant
    medicinal plant
    phenolics content
    chlorogenic acid
    apigenin
    cynarin
    Opis:
    Globe artichoke (Cynara cardunculus L. var. scolymus (L.) Fiori) is an edible herbaceous perennial plant that plays an important economic role in Mediterranean agriculture. In recent years, extensive research, which aimed to characterize the phenolic profile of the most important globe artichoke cultivars in Italy, has been conducted. However, very little information is available on the phenolic composition of cultivars traditionally grown in Spain. In this work, six cultivars (‘Opal’, ‘Symphony’, ‘Concerto’, ‘Madrigal’, ‘Blanca de Tudela’ and ‘A-106’) cultured in Spain were characterized according to their phenolic content. The phenolic profile differed between cultivars, and also between flower parts. The major phenolic compound in all the different cultivars was chlorogenic acid. Of the six studied cultivars, ‘Madrigal’ had the highest phenolic content.
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2018, 17, 2; 177-184
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Enzyme activities regulating ROS metabolism in olive ( Olea europaea L.) seeds
    Autorzy:
    Zienkiewicz, A.
    Jimenez-Quesada, M.
    Traverso, J.
    Zafra, A.
    Lopez-Huertas, E.
    Zienkiewicz, K.
    Castro, A.
    Rodriguez-Garcia, M.
    Alche, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/79927.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    conference
    enzyme activity
    reactive oxygen species
    metabolism
    olive
    Olea europaea
    seed
    antioxidative enzyme
    Źródło:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 2
    0860-7796
    Pojawia się w:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of the transferred water infiltration in the management of a Mediterranean man-maintained wetland: Las Tablas de Daimiel National Park (Spain)
    Autorzy:
    Castańo, S.
    Martínez-Alfaro, P. E.
    Martínez-Santos, P.
    Mediavilla, R.
    Santisteban, J. I.
    López-Pamo, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1182933.pdf
    Data publikacji:
    2005
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    water losses
    przepływy międzybasenowe
    straty wód
    zarządzanie wodą
    bagna
    inter-basins diversion
    water management
    wetlands
    Opis:
    Pochodzenie bagien Parku Narodowego Las Tablas de Daimiel w środkowej Hiszpanii jest związane z wypływem wód podziemnych ze zbiornika regionu zachodniego La Mancha. Wypływ tych wód do bagien zmalał z powodu intensywnej eksploatacji zbiornika. Postępujący zanik bagien skłonił do podjęcia działań zapobiegawczych, w postaci budowy szeregu małych zapór i przepompowywania wody do basenu Las Tablas. Głównym przedsięwzięciem zmierzającym do ratowania bagien było przesyłanie wody z innych basenów, jednak jej część była tracona w obrębie basenu bagiennego, ze względu na infiltrowanie do leżącego niżej zbiornika wód podziemnych. Infiltracja ta stała się ważnym parametrem przy projektowaniu metod utrzymania wody w basenie bagiennym, a także przy zintegrowanym zarządzaniu zasobami wodnymi, związanymi z obszarami bagiennymi. Rzeczywisty rozmiar strat jest trudny do określenia zarówno ze względu na złą jakość istniejących danych, jak i braku określenia różnych ważnych parametrów. Metodyka badań oparta na dziennym bilansie wód w basenie bagiennym pozwala określać te straty i może być stosowana przy zarządzaniu wodami Parku Narodowego.
    Źródło:
    Polish Geological Institute Special Papers; 2005, 18; 10-14
    1507-9791
    Pojawia się w:
    Polish Geological Institute Special Papers
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Postcranial remains of basal typotherian notoungulates from the Eocene of northwestern Argentina
    Autorzy:
    Armella, M.A.
    Garcia-Lopez, D.A.
    Babot, M.J.
    Deraco, V.
    Herrera, C.M.
    Saade, L.
    Bertelli, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2082173.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Mammalia
    Notoungulata
    calcaneum
    astragalus
    plantigrade
    foot stances
    Paleogene
    South America
    Opis:
    Notoungulates represent the most taxonomically diverse and temporally and geographically widespread group among South American native ungulates. Here, we analyze anatomical and systematic aspects of proximal tarsal bones recovered from the Lower and Upper Lumbrera formations (middle and late middle Eocene) in northwestern Argentina. We provide detailed descriptions, comparisons, and infer foot stances and range of movements for the taxa implicated. Material studied includes astragali belonging to the oldfieldthomasiid Colbertia lumbrerense (Lower Lumbrera Formation), a set of proximal tarsals referred as Typotheria indet. (Lower Lumbrera Formation), and tarsals (also including navicular and cuboid) of the informal taxon “Campanorco inauguralis” (Upper Lumbrera Formation). The comparison of the tarsals of Colbertia lumbrerense (middle Eocene of Argentina) with Colbertia magellanica (early Eocene of Brazil) reveals several differences including variations on the development and arrangement of articular facets, and the size of the dorsal astragalar foramen in the Argentinean species. The specimen of Typotheria indet. shows morphological affinities with basal interatheriid taxa. However, its larger size contrasting with the overall small body sizes of Eocene interatheriids precludes an indisputable taxonomic assignment. Concerning “Campanorco inauguralis”, our observations indicate that there is no morphological evidence for a close phylogenetic relationship with Mesotheriidae. It presents a “reversed alternating tarsus” condition, which is also observed in Leontiniidae, “Notohippidae”, Toxodontidae, and some typotherians. However, the spectrum of singularities exhibited by this form precludes the assessment of its relationships in the context of the Paleogene radiation of Typotheria and it is necessary to extend the comparison to Eocene notoungulates. Finally, in a morphofunctional context a plantigrade foot posture is inferred for the specimens here reported. These observations have the potential to provide functional proxies for paleoecological reconstructions to be applied to the study of the early radiation of these notoungulate faunas.
    Źródło:
    Acta Palaeontologica Polonica; 2020, 65, 2; 1-17
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Techno-Functional and Bioactive Properties and Chemical Composition of Guava, Mamey Sapote, and Passion Fruit Peels
    Autorzy:
    López-Martínez, Leticia X.
    Villegas-Ochoa, Mónica A.
    Domínguez-Avila, J. Abraham
    Yahia, Elhadi M.
    Gonzalez-Aguilar, Gustavo A.
    Powiązania:
    https://bibliotekanauki.pl/articles/24024619.pdf
    Data publikacji:
    2023-11-02
    Wydawca:
    Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
    Tematy:
    tropical fruits
    phenolic profile
    antioxidant potential
    enzyme inhibition
    glucose adsorption capacity
    fat/oil binding capacity
    sodium cholate binding capacity
    Opis:
    Due to their nutritional and sensorial characteristics, tropical fruits like guava, mamey sapote, and passion fruit are regularly incorporated into daily diets. Their by-products, especially peels, are approximately 10 to 35% of their weight and possess an important content of bioactive compounds, such as dietary fiber and phenolics. The nutritional, technological, physio-functional properties and phenolic compound compositions of guava, mamey sapote, and passion fruit peels were studied. Peels had promising techno- and physio-functional characteristics, good dietary fiber contents (45.18-61.42 g/100 g), and phenolic profiles with ferulic acid, gallic acid, p-coumaric, and catechin as the main compounds. Peel powders also showed excellent DPPH radical scavenging activity (125.3–252.4 µmol TE/100 g) and Trolox equivalent antioxidant capacity, TEAC (369.2–656.8 µmol TE/100 g). The α-amylase and lipase inhibitory activity varied from 28.15 to 51.4% and 30.89 to 57.15%, respectively. Higher values of α-glucosidase inhibition capacity were found, ranging from 51.64 to 70.32%. The chemical composition and properties reported in the present work suggest that peel powders of these guava, mamey sapote, and passion fruit could be used as constituents in different foods, such as bakery and meat goods, with beneficial health effects like control of hyperglycemia, improved intestinal function, and control of overweight; however, more studies are necessary for animal models and humans to confirm these bioactivities conclusively.
    Źródło:
    Polish Journal of Food and Nutrition Sciences; 2023, 73, 4; 311-321
    1230-0322
    2083-6007
    Pojawia się w:
    Polish Journal of Food and Nutrition Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nutritional and antioxidant profile of the Physalis fruit grown in three Andean regions of Peru
    Autorzy:
    Obregón-La Rosa, A.J.
    Contreras-López, E.
    Juárez, E.F.
    Barrón, U.G.
    Muñoz, A.M.
    Ramos-Escudero, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/28765541.pdf
    Data publikacji:
    2023
    Wydawca:
    Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
    Opis:
    Background. Physalis peruviana L. fruit contains nutritional and bioactive compounds of immense importance to public health and represents a potential ingredient for the development of functional foods and beverages. Objective. This study aimed to determine the chemical and nutritional composition as well as the antioxidant capacity of the P. peruviana L. fruit grown in Peru in three areas of the Central Andean region. Material and methods. Proximal and physicochemical analyses and estimation of mineral content, vitamin C, total carotenoids, total polyphenols, and antioxidant capacity (2, 2-diphenyl-1-picrylhydrazyl [DPPH] and 2, 2′-azinobis (3-ethylbenzothiazoline-6-sulfonic acid) [ABTS] assays) were performed using standardized methods. Results. The fruits were collected from three regions of the Peruvian Andes (Ancash, Cajamarca, and Cusco). The results showed that the content of potassium (306.54–327.60 mg/100 g) and iron (12.93–14.47 mg/kg) was prominent. The Physalis fruit had high levels of vitamin C (47.20–52.20 mg/100 g), total polyphenols (68.17–83.40 mg equivalents of gallic acid/100 g), and carotenoids (1.12–1.73 mg β-carotene/100 g). Higher values for antioxidant capacity were obtained with the ABTS method (896–1003.33 μmol Trolox/100 g) than with the DPPH method (290–309 μmol Trolox/100 g). Conclusions. This study confirms that the P. peruviana fruit has properties that could provide important health benefits and that it could be used for the development of functional foods and food supplement.
    Źródło:
    Roczniki Państwowego Zakładu Higieny; 2023, 74, 1; 49-57
    0035-7715
    Pojawia się w:
    Roczniki Państwowego Zakładu Higieny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Seamless communication for crisis management
    Ponadsystemowa łączność do zarządzania kryzysowego
    Autorzy:
    Wojciechowicz, W.
    Fournier, J.
    Konecny, M.
    Vanya, S.
    Stoodley, J.
    Entwisle, P.
    Hein, D. M.
    Machalek, A.
    Fournaris, A.
    Uriarte, M.
    Lopez, O.
    O'Neill, S.
    Bradl, H.
    Balogh, Z.
    Gatial, E.
    Hluchy, L.
    Mirosław, T.
    Zych, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/298322.pdf
    Data publikacji:
    2012
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie
    Tematy:
    SECRICOM
    bezszwowa komunikacja
    zarządzanie kryzysowe
    Multi Bearer Router
    MBR
    Push To Talk
    PTT
    SECRICOM Silentel
    Secure Docking Module
    SDM
    Secure Agent Infrastructure
    SAI
    Communication Security Monitoring and Control Centre
    CSMCC
    siódmy program ramowy
    7PR
    Trusted Computing
    seamless communication
    crisis management
    Push To Talk (PTT)
    Seventh Framework Programme
    FP7
    Opis:
    SECRICOM - Seamless Communication for crisis management was a research and development project, realised within the Seventh Framework Programme (7PR). The aim of this project was to develop reference solution based on existing infrastructure, which will be capable to ensure secure and efficient communication for operational crisis management. The project was an answer to the European Security Research Advisory Board (ESRAB) report, in which key requirements for a communication system have been stated. Secure and efficient communication system is a necessity for effective crisis management. It is assumed that such infrastructure may significantly increase rescue actions effectiveness. Currently, however, there are cases when various services (not only domestically but also internationally) use heterogeneous telecommunications systems. It results in the lack of or significant problems with mutual communication. Such situation is often considered problematic and posing a threat to the effective rescue actions. For this purpose, a secure and multi-platform communications system (SECRICOM Silentel) has been developed within SECRICOM project. The Multi Bearer Router (MBR) optimise the backbone network by the use of multiple bearers and dynamic adjustment to various conditions. Advance mechanisms enhancing end-user devices' security - Secure Docking Module (SDM) - have been developed using Trusting Computing principles. Secure Agent Infrastructure (SAI) ensures - based on agents' infrastructure - secure access to distributed data. The system is supplemented with network monitoring platform - Communication Security Monitoring and Control Centre. The SECRICOM project resulted in a communication system prototype, which is capable of ensuring interoperability as well as secure and efficient communication for operational crisis management. This system has been demonstrated on several occasions to the stakeholders.
    SECRICOM - Seamless Communication for crisis management to projekt badawczo-rozwojowy, który został zrealizowany w ramach siódmego programu ramowego (7PR). Celem projektu było wypracowanie bezpiecznej i, co ważne, bazującej na istniejącej infrastrukturze platformy komunikacyjnej do operacyjnego zarządzania kryzysowego. Projekt ten stanowi odpowiedź na raport European Security Research Advisory Board (ESRAB), w którym określono najważniejsze wymagania odnośnie do systemu komunikacji. Bezpieczny i wydajny system komunikacji jest warunkiem koniecznym do efektywnego zarządzania w sytuacjach kryzysowych. Przyjmuje się, że taka platforma jest w stanie znacząco zwiększyć efektywność prac służb ratunkowych. Obecnie jednak są przypadki, gdy służby ratunkowe (nie tylko na arenie międzynarodowej, lecz także podczas działań w jednym kraju) korzystają z niejednorodnych systemów telekomunikacyjnych, co często skutkuje brakiem lub istotnymi problemami z wzajemną łącznością. Sytuacja ta jest postrzegana jako problematyczna i stanowi zagrożenie dla efektywnego działania służb ratunkowych. W ramach projektu SECRICOM opracowano system międzyplatformowej, bezpiecznej łączności SECRICOM Silentel. Za optymalizację transmisji danych (w tym wykorzystanie wielu nośnych oraz dynamiczne dostosowywanie się do warunków) w sieci dystrybucyjnej oraz szkieletowej odpowiada Multi Bearer Router (MBR). Zaawansowane mechanizmy zwiększające bezpieczeństwo urządzeń końcowych - Secure Docking Module (SDM) - opracowano z wykorzystaniem pryncypiów Trusted Computing. Secure Agent Infrastructure (SAI) zapewnia - oparty na infrastrukturze agentów - bezpieczny dostęp do rozproszonych danych. System uzupełnia platforma nadzoru nad siecią - Communication Security Monitoring and Control Centre. Jako rezultat projektu zbudowano oraz kilkukrotnie zademonstrowano prototypową wersję systemu komunikacji. System ten jest zdolny do zapewnienia interoperacyjnej, bezpiecznej i wydajnej łączności w zarządzaniu w sytuacjach kryzysowych.
    Źródło:
    Technical Sciences / University of Warmia and Mazury in Olsztyn; 2012, 15(1); 65-79
    1505-4675
    2083-4527
    Pojawia się w:
    Technical Sciences / University of Warmia and Mazury in Olsztyn
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A field trial of recombinant Schistosoma japonicum paramyosin as a potential vaccine in naturally-infected water buffaloes
    Autorzy:
    Jiz II, M.A.L.
    Mingala, C.N.
    Lopez, I.F.M.
    Chua, M.
    Gabonada Jr., F.G.
    Acosta, L.P.
    Wu, H.
    Kurtis, J.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/6326.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Opis:
    The overall aims of this project are to assess the safety and immunogenicity of the Schistosoma japonicum vaccine paramyosin among water buffaloes residing in endemic areas. The study was conducted in four villages in Leyte, the Philippines, an area highly endemic for schistosomiasis japonica. One hundred and fifteen (N=115) animals provided baseline stool samples for coprologic examination, with preliminary results using FLOTAC showing a 10% prevalence of schistosomiasis. Forty-nine (N=49) animals consented to treatment with 25 mg/kg Praziquantel, and 40, 36 and 32 animals consented to the first, second and third dose of the paramyosin vaccine, respectively. The safety trial involved the first 20 animals and included skin testing, vaccination, anaphylaxis monitoring, as well as hematology and serum chemistry analysis. Skin tests revealed that only three out of 20 animals exhibited redness at the injection site, with none greater than 1 cm. None of the animals exhibited anaphylaxis, and all hematology and serum chemistry markers were within normal range or were similar to pre-vaccination levels. None of the 40 animals administered with the first dose exhibited anaphylaxis, nor any of the subsequent vaccine doses. Immunogenicity assessment of sera collected prior to every vaccination and one month after the last dose showed that the paramyosin vaccine induced robust antibody responses to all animals, as assessed by ELISA. The cytokine levels of whole blood culture supernatants will be further assessed. Our findings demonstrate that the S. japonicum paramyosin vaccine is a safe, well-tolerated and immunogenic treatment among water buffalos residing in endemic areas.
    Źródło:
    Annals of Parasitology; 2016, 62, 4
    0043-5163
    Pojawia się w:
    Annals of Parasitology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis of SrTiO3 by the Calcination of SrCO3 and TiO2 Mixtures Intensively Ground by Means of High Energy Milling
    Autorzy:
    Rocha-Rangel, Enrique
    Pech-Rodríguez, Wilian J.
    López-Hernández, Juan
    Calles-Arriaga, Carlos A.
    Armendáriz-Mireles, Eddie N.
    Castillo-Robles, José A.
    Rodríguez-García, José A.
    Powiązania:
    https://bibliotekanauki.pl/articles/356247.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    SrTiO3
    mechanochemistry
    insulating ceramics
    perovskite
    Opis:
    A SrTiO3 electroceramic with perovskite structure was produced by the calcination of a mixture of SrCO3 and TiO2 intensively grounded by high energy milling. For this purpose, raw materials were mixed in stoichiometric amounts in a planetary type mill; the obtained powder mixture was calcined for 2 h at temperatures between 800 and 1300°C. Samples resulting from the calcination were characterized by XRD, FTIR, SEM analysis and electrical measurements. From XRD, it was determined that the SrTiO3 formed presents the cubic structure of perovskite. The complete reaction for SrTiO3 compound formation occurs at 1200°C. Micrograph observations indicate the presence of a homogeneous microstructure with tiny grain size. The measured values of electrical resistivity were within the typical range of insulating materials.
    Źródło:
    Archives of Metallurgy and Materials; 2020, 65, 2; 621-626
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis and characterization of a citric and lipoic acids-derived dendrimer
    Synteza i charakterystyka dendrymeru pochodzącego z kwasu cytrynowego i liponowego
    Autorzy:
    Salgado-Delgado, René
    Salgado-Delgado, Areli M.
    Olarte-Paredes, Alfredo
    García-Fuentes, Juan J.
    López-Lara, Teresa
    Hernández-Zaragoza, Juan B.
    García-Hernández, Edgar
    Castaño, Víctor M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2202634.pdf
    Data publikacji:
    2023
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
    Tematy:
    dendrimer
    citric acid
    lipoic acid
    dendrymer
    kwas cytrynowy
    kwas liponowy
    Opis:
    The paper describes the synthesis and characterization of two third generation dendrimers from citric acid and a variant with a dendron terminated with lipoic acid. FTIR and C NMR confirmed the presence of signals characteristic for the dendrimer functional groups OH, C-O, C=O, C-H and C-S. DSC showed that, unlike citric acid, the dendrimer is amorphous. SEM revealed changes in the structure of citric acid particles in each dendrimer generation. In addition, the structure was more homogeneous. Dendrimers are hydrophobic due to ester linkages. Contact angle > 90° confirms their hydrophobic char-acter. Moreover, the dendrimer with a dendron terminated with lipoic acid absorbs Cu+2 and Fe+3metal ions, so it can be used as an adsorbent for heavy metals.
    W pracy opisano syntezę i charakterystykę dwóch dendrymerów trzeciej generacji z kwasu cytrynowego oraz wariantu z dendronem zakończonym kwasem liponowym. Metodą FTIR i C NMR potwierdzono sygnały charakterystyczne dla grup funkcyjnych dendrymeru OH, C-O, C=O, C-H i C-S. Metodą DSC wykazano, że w odróżnieniu od kwasu cytrynowego dendrymer jest amorficzny. Mikrofotografie SEM wykazały zmiany w strukturze cząstek kwasu cytrynowego w każdym pokoleniu dendrymeru. Ponadto struktura była bardziej jednorodna. Dzięki wiązaniom estrowym otrzymane dendrymery są hydrofobowe, co potwierdza kąt zwilżania > 90°. Wykazano również, że dendrymer z dendronem zakończonym kwasem liponowym absorbuje jony metali Cu+2 i Fe+3, dzięki czemu może być stosowany jako adsorbent metali ciężkich.
    Źródło:
    Polimery; 2023, 68, 1; 25--31
    0032-2725
    Pojawia się w:
    Polimery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Physical and chemical characterization of masa and tortillas from parental lines, crosses, and one hybrid
    Autorzy:
    Valderrama-Bravo, C.
    Dominguez-Pacheco, A.
    Hernandez-Aguilar, C.
    Zepeda-Bautista, R.
    del Real-Lopez, A.
    Pahua-Ramos, M.E.
    Arellano-Vazquez, J.L.
    Moreno-Martinez, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/24739.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Opis:
    In maize plant breeding aimed at producing a hybrid, it is necessary to characterize the parents and hybrids by their agronomic aspects and grain quality so that the processing industry may offer consumers a quality product and also improve its efficiency. This study evaluated the viscoelastic parameters of masa and the chemical and texture properties of tortillas obtained from parent lines (M-54, M55, and CML-242), two single crosses (M54xM55 and M55xM54), and one hybrid (H-70). The morpho- logy of the maize grains and tortillas was analyzed using scanning electron microscopy. The firmness of masa obtained from CML-242 and H-70 maize was higher than that from the other maize genotypes. M-54 tortillas showed the lowest crude fiber content. Otherwise, tortillas obtained from the M55xM54 hard grain had the lowest fat content and extensibility, while H-70 tortillas showed an intermediate breaking point and extensibility. M-54 and M54xM55 tortillas were softer due to their more swollen starch granules. In contrast, rigid tortillas were obtained from CML-242 and H-70. Grain hardness causes different morphology in starch and tortilla of maize genotypes. However, grain hardness did not influence the characteristics of texture in tortillas.
    Źródło:
    International Agrophysics; 2017, 31, 1
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Orchards pruning to energy - the results of the environmental impact assessment of the new logistic chain developed within the EuroPruning project - Part 2
    Gałęzie z sadów na cele energetyczne - wyniki oceny oddziaływania na środowisko nowego łańcucha logistycznego opracowanego w ramach projektu EuroPruning - Cz. 2
    Autorzy:
    Dyjakon, A.
    Boer den, J.
    Garcia-Galindo, D.
    Adamczyk, F.
    Lopez, E.
    Sebastian, F.
    Suardi, A.
    Gebresenbet, G.
    Jirjis, R.
    Bosona, T.
    Germer, S.
    Bischoff, W. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/93472.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Inżynierii Rolniczej
    Tematy:
    pruned biomass
    energetic utilisation
    environmental impact assessment
    biomasa
    gałęzie
    wykorzystanie energetyczne
    ocena oddziaływania na środowisko
    Opis:
    To determine the environmental impact, the assessment of the EuroPruning project strategy has been carried out in accordance with the checking and scooping list related to Directive 97/11/EC. Additionally, some suggestions and recommendations to prevent/minimize the hazard of accidents or negative interaction on surrounding have been elaborated (according to the suggested procedure in ISO 14001 methodology: risk definition and prevention action proposal). As a consequence, the results of the inspection during the demo tests taking place in different orchards/plantations regarding the performance of the machineries operation, farmers’ habits and pruning residues harvesting procedures have been presented, in order to diagnose and determine possible risks that may occur and influence negatively the local environment. Similar activities have been carried out during the storage tests and transportation processes.
    W celu określenia stopnia oddziaływania na środowisko strategii przyjętej w projekcie EuroPruning, polegającej na wykorzystaniu ściętych gałęzi z sadów i plantacji w celach energetycznych, przeprowadzono analizę w oparciu o zasady postępowania zawarte w dyrektywie 97/11/EC. Dodatkowo, w odniesieniu do procedury zawartej w metodologii ISO 14001: definicja ryzyka i proponowane działania prewencyjne, opracowano wskazówki i rekomendacje mające na celu eliminację lub ograniczenie ryzyka wypadku czy negatywnego oddziaływania na otoczenie zewnętrzne. W konsekwencji, przedstawiono wyniki inspekcji dokonanych podczas badań testowych przeprowadzanych w różnych sadach i plantacjach drzew owocowych (obejmujących działanie pracujących maszyn, nawyki sadownika oraz proces zbierania ściętych gałęzi) pod kątem identyfikacji oraz określenia zakresu zagrożeń, które mogą wystąpić i wpływać negatywnie na środowisko. Podobne działania przeprowadzono dla procesu magazynowania i transportu biomasy sadowniczej.
    Źródło:
    Agricultural Engineering; 2018, 22, 1; 37-48
    2083-1587
    Pojawia się w:
    Agricultural Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    From Light to Heavy Nuclear Systems, Production and Decay of Fragments Studied with Powerful Arrays
    Autorzy:
    Casini, G.
    Morelli, L.
    Barlini, S.
    Piantelli, S.
    D'Agostino, M.
    Baiocco, G.
    Marchi, T.
    Abbondanno, U.
    Ademard, G.
    Appannababu, S.
    Bini, M.
    Bonnet, E.
    Borderie, B.
    Bougault, R.
    Bruno, M.
    Chbihi, A.
    Cinausero, M.
    Degerlier, M.
    Fabris, D.
    Frankland, J.
    Gelli, N.
    Gramegna, F.
    Gruyer, D.
    Gulminelli, F.
    Kordyasz, A.
    Kozik, T.
    Kravchuk, V.
    Kulig, P.
    Le Neindre, N.
    Lopez, O.
    Maurenzig, P.
    Olmi, A.
    Pasquali, G.
    Pârlog, M.
    Poggi, G.
    Rivet, M.
    Rosato, E.
    Sosin, Z.
    Spadaccini, G.
    Stefanini, A.
    Twarog, T.
    Valdrè, S.
    Vient, E.
    Raduta, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402639.pdf
    Data publikacji:
    2015-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    25.70.Gh
    25.70.Pq
    25.70.Mn
    29.40.-n
    Opis:
    Reactions between heavy-ions at various energy regimes produce many nuclear fragments which can be populated in highly excited states. The study of these fragments, detected at the end of their particle decay, is important to investigate nuclear forces and structure effects. In recent years there have been many efforts to extend these studies towards the drip-lines, i.e. to systems far from the β-stability valley, by using accelerated radioactive beams. The development of such infrastructures is accompanied by the development of more powerful detectors and associated electronics, capable to identify ions with very different sizes and kinetic energies. Here we give two examples which show how advanced arrays can contribute to the studies on nuclear phenomena. The examples come from the European FAZIA collaboration and from recent campaigns with the GARFIELD apparatus, the latter in operation at the INFN Legnaro Laboratory (Italy) where the SPES RIB facility is under construction.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 5; 1548-1551
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Towards long-term standardised carbon and greenhouse gas observations for monitoring Europe´s terrestrial ecosystems: a review
    Autorzy:
    Franz, D.
    Acosta, M.
    Altimir, N.
    Arriga, N.
    Arrouays, D.
    Aubinet, M.
    Aurela, M.
    Ayres, E.
    Lopez-Ballesteros, A.
    Barbaste, M.
    Berveiller, M.
    Biraud, S.
    Boukir, H.
    Brown, T.
    Brummer, C.
    Buchmann, N.
    Burba, G.
    Carrara, A.
    Cescatti, A.
    Ceschia, E.
    Clement, R.
    Cremonese, E.
    Crill, P.
    Darenova, E.
    Dengel, S.
    D’Odorico, P.
    Filippa, G.
    Fleck, S.
    Fratini, G.
    Fub, R.
    Gielen, B.
    Gogo, S.
    Grace, J.
    Graf, A.
    Grelle, A.
    Gross, P.
    Grunwald, T.
    Haapanala, S.
    Hehn, M.
    Heinesch, B.
    Heiskanen, J.
    Herbst, M.
    Herschlein, C.
    Hortangl, L.
    Hufkens, K.
    Ibrom, A.
    Jolivet, C.
    Joly, L.
    Jones, M.
    Kiese, R.
    Klemendsson, L.
    Kljun, N.
    Klumpp, K.
    Kolari, P.
    Kolle, O.
    Kowalski, A.
    Kutsch, W.
    Laurila, T.
    De Ligne, A.
    Linder, S.
    Lindroth, A.
    Lohila, A.
    Longdoz, B.
    Mammarella, I.
    Manise, T.
    Maranon Jimenez, S.
    Matteucci, G.
    Mauder, M.
    Meier, P.
    Merbold, L.
    Mereu, S.
    Metzger, S.
    Migliavacca, M.
    Molder, M.
    Montagnani, L.
    Moureaux, C.
    Nelsson, D.
    Nemitz, E.
    Nicolini, G.
    Nilsson, M.B.
    Op de Beeck, M.
    Osborne, B.
    Lofvenius, M.O.
    Pavelka, M.
    Peichl, M.
    Peltola, O.
    Pihlatie, M.
    Pitacco, A.
    Pokorny, R.
    Pumpanen, J.
    Ratie, C.
    Rebmann, C.
    Roland, M.
    Sabbatini, S.
    Saby, N.P.A.
    Saunders, M.
    Schmid, H.P.
    Schrumpf, M.
    Sedlak, P.
    Serrano Ortiz, P.
    Siebicke, L.
    Sigut, L.
    Silvennoinen, H.
    Simioni, G.
    Skiba, U.
    Sonnentag, O.
    Soudani, K.
    Soule, P.
    Steinbrecher, R.
    Tallec, T.
    Thimonier, A.
    Tuittila, E.-S.
    Tuovinen, J.P.
    Vestin, P.
    Vncent, G.
    Vincke, S.
    Vitalle, D.
    Waldner, P.
    Weslien, P.
    Wingate, L.
    Wohlfahrt, G.
    Zahniser, M.
    Vesala, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/25745.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Źródło:
    International Agrophysics; 2018, 32, 4
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-92 z 92

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