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

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    Wyświetlanie 1-69 z 69
    Tytuł:
    A nonlinear model of a turbine blade by asymptotic analysis
    Autorzy:
    Rodriguez, J. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/907896.pdf
    Data publikacji:
    2002
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    matematyka
    asymptotic analysis
    nonlinear elasticity
    junctions
    shallow shells
    multistructures
    Opis:
    In this paper we obtain a limit model for a turbine blade fixed to a 3D solid. This model is a three-dimensional linear elasticity problem in the 3D part of the piece (the rotor) and a two-dimensional problem (the nonlinear shallow shell equations) in the 2D part (the turbine blade), with junction conditions in the part of the turbine blade fixed to the rotor. To obtain this model, we perform an asymptotic analysis, starting with the nonlinear three-dimensional elasticity equations on all the pieces and taking as a small parameter the thickness of the blade.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2002, 12, 1; 101-113
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An algebraic derivative associated to the operator $D^δ$
    Autorzy:
    Almeida, V.
    Castro, N.
    Rodríguez, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1207615.pdf
    Data publikacji:
    2000
    Wydawca:
    Polska Akademia Nauk. Instytut Matematyczny PAN
    Opis:
    In this paper we get an algebraic derivative relative to the convolution $(f*g)(t)=∫_0^ti f(t-ψ)g(ψ)dψ$ associated to the operator $D^δ$, which is used, together with the corresponding operational calculus, to solve an integral-differential equation. Moreover we show a certain convolution property for the solution of that equation
    Źródło:
    Banach Center Publications; 2000, 53, 1; 71-78
    0137-6934
    Pojawia się w:
    Banach Center Publications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Bio-methanization of organic fraction from municipal solid waste: temperature effects
    Autorzy:
    Fernández-Rodríguez, J.
    Pérez, M.
    Romero, L. I.
    Powiązania:
    https://bibliotekanauki.pl/articles/779264.pdf
    Data publikacji:
    2013
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    anaerobic digestion
    OFMSW
    mesophilic
    thermophilic
    methane
    Opis:
    The main objective of this study was to analyse the development of dry anaerobic digestion process of OFMSW in batch reactors under two temperature ranges, thermophilic (55°C) and mesophilic (35°C). The experimental results lead to the conclusion that the thermophilic range has a greater rate of hydrolysis and is therefore more effective to degrade wastes, shortening the overall operating time. For example, the hydrolytic step in the thermophilic (T) process lasted an average of 8 days versus 14 days in the mesophilic (M) range. The methanogenic phase lasted for 18 and 29 days in the T and M processes, respectively. The mesophilic range showed higher removal of the organic effluent but with greater uptime requirements. Moreover, the thermophilic range showed greater productivities than the mesophilic range, and the productivities were approximately doubled in terms of the produced biogas from a given amount of consumed organic matter.
    Źródło:
    Polish Journal of Chemical Technology; 2013, 15, 2; 99-106
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical model of so2 scrubbing with seawater applied to marine engines
    Autorzy:
    Lamas, M. I.
    Rodríguez, C. G.
    Rodríguez, J. D.
    Telmo, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/258856.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    sulphur dioxide
    SO2
    scrubbers
    CFD
    Opis:
    The present paper proposes a CFD model to study sulphur dioxide (SO2) absorption in seawater. The focus is on the treatment of marine diesel engine exhaust gas. Both seawater and distilled water were compared to analyze the effect of seawater alkalinity. The results indicate that seawater is more appropriate than distilled water due to its alkalinity, obtaining almost 100% cleaning efficiency for the conditions analyzed. This SO2 reduction meets the limits of SOx emission control areas (SECA) when operating on heavy fuel oil. These numerical simulations were satisfactory validated with experimental tests. Such data are essential in designing seawater scrubbers and judging the operating cost of seawater scrubbing compared to alternative fuels.
    Źródło:
    Polish Maritime Research; 2016, 2; 42-47
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of the pre-injection system of a marine diesel engine through multiple-criteria decision-making and artificial neural networks
    Autorzy:
    Rodriguez, C. G.
    Lamas, M. I.
    Rodriguez, J. D.
    Abbas, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2033205.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    marine engine
    emissions
    consumption
    artificial neural networks
    multi-criteria decision making
    computational fluid dynamics
    Opis:
    The present work proposes several pre-injection patterns to reduce nitrogen oxides in the Wartsila 6L 46 marine engine. A numerical model was carried out to characterise the emissions and consumption of the engine. Several pre-injection quantities, durations, and starting instants were analysed. It was found that oxides of nitrogen can be noticeably reduced but at the expense of increasing consumption as well as other emissions such as carbon monoxide and hydrocarbons. According to this, a multiple-criteria decision-making (MCDM) model was established to select the most appropriate parameters. Besides, an artificial neural network (ANN) was developed to complement the results and analyse a huge quantity of alternatives. This hybrid MCDM-ANN methodology proposed in the present work constitutes a useful tool to design new marine engines.
    Źródło:
    Polish Maritime Research; 2021, 4; 88-96
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of ancient forging devices: 3D modelling and analysis using current computer methods
    Autorzy:
    Rojas-Sola, J. I.
    Bouza-Rodríguez, J. B.
    Comesaña-Campos, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/200411.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    forging device
    hydraulic trompe
    3D modelling
    computational fluid dynamics
    finite element analysis
    urządzenie do kucia
    modelowanie 3D
    analiza elementów skończonych
    Opis:
    An ancient forging device in Spain has been studied, namely the forge with a waterwheel and air-blowing tube or hydraulic trompe, found near the village of Santa Eulalia de Oscos (province of Asturias, Spain). Three procedures using ad hoc methods were applied: 3D modelling, finite element analysis (FEA), and computational-fluid dynamics (CFD). The CFD results indicated the proper functioning of the trompe, which is a peculiar device based on the Venturi effect to take in air. The maximum air volume flow rate supplied to the forge by the trompe was shown to be 0.091 m3/s, and certain parameters of relevance in the trompe design presented optimal values, i.e. offering maximum air-flow supply. Furthermore, the distribution of stress over the motion-transmission system revealed that the stress was concentrated most intensely in the cogs of the transmission shaft (a kind of camshaft), registering values of up to 7.50 MPa, although this value remained below half of the maximum admissible work stress. Therefore, it was confirmed that the oak wood from which the motion system and the trompe were made functioned properly, as these systems never exceeded the maximum admissible working stress, demonstrating the effectiveness of the materials used in that period.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2019, 67, 2; 377-390
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical analysis of emissions from marine engines using alternative fuels
    Autorzy:
    Lamas, M. I.
    Rodriguez, C. G.
    Telmo, J.
    Rodriguez, J. D.
    Powiązania:
    https://bibliotekanauki.pl/articles/260425.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    fuel
    natural gas
    hydrogen
    marine engine
    emissions
    Opis:
    The current restrictions on emissions from marine engines, particularly sulphur oxides (SOx ), nitrogen oxides (NOx ) and carbon dioxide (CO2 ), are compelling the shipping industry to a change of tendency. In the recent years, many primary and secondary reduction techniques have been proposed and employed in marine engines. Nevertheless, the increasingly restrictive legislation makes it very difficult to continue developing efficient reduction procedures at competitive prices. According to this, the paper presents the possibility to employ alternative fuels. A numerical model was developed to analyze the combustion process and emissions using oil fuel, natural gas and hydrogen. A commercial marine engine was studied, the Wartsila 6L 46. It was found, that hydrogen is the cleanest fuel regarding CO2 , hydrocarbons (HC) and carbon monoxide (CO). Nevertheless, it is very expensive for marine applications. Natural gas is cheaper and cleaner than fuel oil regarding CO2 and CO emissions. Still, natural gas emits more NOx and HC than oil fuel. SOx depends basically on the sulphur content of each particular fuel.
    Źródło:
    Polish Maritime Research; 2015, 4; 48-52
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Three-dimensional cfd analysis to study the thrust and efficiency of a biologicallyinspired marine propulsor
    Autorzy:
    Lamas, M. I.
    Rodríguez, J. D.
    Rodríguez, C. G.
    González, P. B.
    Powiązania:
    https://bibliotekanauki.pl/articles/259319.pdf
    Data publikacji:
    2011
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    fish swimming
    marine propulsion
    undulating fin
    biomimetic
    computational fluid dynamics (CFD)
    CFD
    Opis:
    Aquatic animals, which are the result of many millions of years of evolutionary optimization, are very quick, efficient, robust, and versatile. Accordingly, biologically-inspired mechanisms which emulate the movement of animals have recently become very popular. For the efficient design of a propulsion system it is very important to analyze the fluid flow in detail. CFD (Computational Fluid Dynamics) has become a powerful technique to understand the phenomena because it gives extensive information about the fluid flow characteristics. In the present work, a propulsion system consisting of an undulating fin which emulates the fish swimming was built. In order to optimize the mechanism, several undulating configurations were studied using a 3D turbulent CFD model. The thrust, drag, efficiency and hydrodynamic characteristics were analyzed. Furthermore, it was shown that the efficiency and thrust depend strongly on the oscillation frequency, amplitude and wavelength. In order to validate this CFD model, the numerically obtained thrust was successfully compared with experimental results from the laboratory mechanism.
    Źródło:
    Polish Maritime Research; 2011, 1; 10-16
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Annual cycle of phytoplankton community through the water column: Study applied to the implementation of bivalve offshore aquaculture in the Southeastern Bay of Biscay
    Autorzy:
    Muniz, O.
    Revilla, M.
    Rodriguez, J.G.
    Laza-Martinez, A.
    Fontan, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/47941.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    phytoplankton community
    water column
    open water
    bivalve
    biomass
    chlorophyll a
    nutrient
    hydrographic condition
    environmental variability
    Biscay Bay
    Źródło:
    Oceanologia; 2019, 61, 1
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Performance analysis of an InAs/GaSb superlattice barrier photodetector covering the full LWIR spectral domain
    Autorzy:
    Alchaar, R.
    Rodriguez, J.-B.
    Höglund, L.
    Naureen, S.
    Costard, E.
    Christol, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1818247.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
    Tematy:
    barrier photodetector
    InAs/GaSb type-2 superlattice
    long wavelength infrared
    performance analysis
    Opis:
    In this paper, we present the electrical and electro-optical characterizations of an InAs/GaSb type-2 superlattice barrier photodetector operating in the full longwave infrared spectral domain. The fabricated detectors exhibited a 50% cut-off wavelength around 14 μm at 80 K and a quantum efficiency slightly above 20%. The dark current density was of 4.6×10⁻² A/cm² at 80 K and a minority carrier lateral diffusion was evaluated through dark current measurements on different detector sizes. In addition, detector spectral response, its dark current-voltage characteristics and capacitance-voltage curve accompanied by electric field simulations were analyzed in order to determine the operating bias and the dark current regimes at different biases. Finally, dark current simulations were also performed to estimate a minority carrier lifetime by comparing experimental curves with simulated ones.
    Źródło:
    Opto-Electronics Review; 2020, 28, 3; 164--170
    1230-3402
    Pojawia się w:
    Opto-Electronics Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of a sheltered euhaline area of the Southeastern Bay of Biscay to sustain bivalve production in terms of phytoplankton community composition
    Autorzy:
    Bilbao, J.
    Muniz, O.
    Rodriguez, J.G.
    Revilla, M.
    Laza-Matinez, A.
    Seoane, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2078991.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    phytoplankton community
    phytoplankton composition
    biomass
    physicochemical variation
    aquaculture
    mussel
    Biscay Bay
    Opis:
    This study describes the phytoplankton community in sheltered euhaline waters of the Basque coast (southeastern Bay of Biscay). Phytoplankton composition, cell size, abundance, biomass and the presence of potentially toxic taxa, together with chlorophyll a, nutrients and hydrographic and optical conditions were measured, from August 2016 to August 2017, in the Mutriku port, with the main aim of assessing the suitability of the phytoplankton community as a food resource for bivalves. The water column in Mutriku showed the typical environmental conditions of Basque marine waters, with no significant nutrient enrichment caused by anthropogenic pressures. Haptophytes represented the greatest contribution to cell abundance (31—47%), and diatoms were the dominant group in terms of biomass (52—79%), which could favour mussel growth due to their high fatty acid content. In addition, the size structure of the phytoplankton community was suitable for mussel ingestion, since the predominant cell size was 2—20 μm. Regarding toxic phytoplankton, the genera that pose a risk for human health and those that affect negatively mussel physiology and survival were considered. Altogether, ten toxic phytoplankton taxa were identified, contributing in less than 5% to the total cell abundance of Mutriku. However, median chlorophyll a concentration was low (0.5 μg L−1), reflecting the oligotrophic conditions of the area. Therefore, even if the composition of the phytoplankton community could be favourable for bivalve aquaculture, biomass values are low compared to other zones of bivalve production.
    Źródło:
    Oceanologia; 2021, 63, 1; 12-26
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Inhomogeneity detection in phytoplankton time series using multivariate analyses
    Autorzy:
    Muniz, O.
    Rodriguez, J.G.
    Revilla, M.
    Laza-Martinez, A.
    Seoane, S.
    Franco, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2079181.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    phytoplankton community
    monitoring programme
    uncertainty
    multivariate analysis
    inhomogeneity
    Opis:
    Phytoplankton communities have long been used as water quality indicators within environmental policies. This has fostered the development of national and international phytoplankton monitoring programs, but these networks are subject to sources of uncertainty due to laboratory issues. Nevertheless, studies regarding the interference associated with these aspects are not well-documented. Hence, a long time series (2003–2015) from the Basque continental shelf (southeastern Bay of Biscay) was analyzed to evaluate the uncertainty given by laboratory strategies when studying phytoplankton variability. Variability in phytoplankton communities was explained not only by environmental conditions but also by changes in fixatives (glutaraldehyde and acidic Lugol's solution) and laboratory staff. Based on Bray-Curtis distances, phytoplankton assemblages were found to be significantly dissimilar according to the effect of changes in the specialist handling the sample and the employed fixative. The pair-wise permutational multivariate analysis of variance (PERMANOVA) showed significant differences between the two fixatives utilized and also between the three taxonomists involved. Thus, laboratory-related effects should be considered in the study of phytoplankton time series.
    Źródło:
    Oceanologia; 2020, 62, 3; 243-254
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Eocene and not Cretaceous origin of spider wasps: fossil evidence from amber
    Autorzy:
    Rodriguez, J.
    Waichert, C.
    Von Dohlen, C.D.
    Poinar,Jr., G.
    Pitts, J.P.
    Powiązania:
    https://bibliotekanauki.pl/articles/20131.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Eocene
    Cretaceous
    spider wasp
    pompilid wasp zob.spider wasp
    fossil evidence
    amber
    Hymenoptera
    Pompilidae
    Opis:
    Spider wasps had long been proposed to originate in the Late Cretaceous based on the Burmese amber fossil Bryopompilus interfector. We performed a morphological examination of this fossil and determined that it does not belong to Pompilidae or any other described hymenopteran family. Instead, we place it in the new family Bryopompilidae. The oldest verifiable member of the Pompilidae is from Baltic amber, which suggests that the crown group of the family probably originated in the Eocene, not in the Late Cretaceous as previously proposed. The origin of spider wasps appears to be correlated with an increase in spider familial diversity in the Cenozoic. We also add two genera to the extinct pompilid fauna: Tainopompilus Rodriguez and Pitts gen. nov. and Paleogenia Waichert and Pitts gen. nov., and describe three new species of fossil spider wasps: Anoplius planeta Rodriguez and Pitts sp. nov., from Dominican amber (Burdigalian to Langhian); Paleogenia wahisi Waichert and Pitts sp. nov., from Baltic amber (Lutetian to Priabonian); and Tainopompilus argentum Rodriguez and Pitts sp. nov., from Dominican amber (Chattian to Langhian).
    Źródło:
    Acta Palaeontologica Polonica; 2016, 61, 1
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Kelvin-Helmholtz instabilities in the Colorado River Delta, Gulf of California
    Autorzy:
    Carbajal, N.
    Vargas, J.T.
    Rodriguez, J.H.G.
    Montano Ley, Y.
    Salas de Leon, D.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2078904.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    Kelvin-Helmholtz instability
    Colorado River Delta
    tidal current
    bottom sediment
    bathymetry
    suspended sediment
    satellite image
    Opis:
    In the Colorado River Delta, the interaction of tidal currents and sea-bottom sediment formed, in geological times, large-scale seabed patterns known as sandbanks. These patterns are oriented along the delta, almost parallel to the dominant tidal flow, with the bathymetry having an undulating character across the delta. Calculations and analysis showed that the interaction of tidal currents with the bathymetry causes velocity shears, faster flowing over the ridges than in the troughs. Kelvin-Helmholtz instabilities emerge from the velocity shear, and a large amount of suspended sediment makes the instabilities visible in satellite images. The physical and dynamic conditions allowed us to find an explanation for the existence of these Kelvin-Helmholtz instabilities. Since sandbanks have been observed in different seas such as the North Sea, The Gulf of Korea, the Gulf of Khambhat in India, the Jiangsu coast in China, the Persian Gulf, and Moreton Bay in Australia, the results suggest the existence of instabilities in these areas. Satellite images, intense tidal currents, undulating topography, and suspended sediment made it possible to explain the generation and identification of KelvinHelmholtz instabilities.
    Źródło:
    Oceanologia; 2021, 63, 3; 321-328
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Relation between strain hardening of steel and critical impact velocity in tension
    Zależność między umocnieniem odkształceniowym stali a krytyczną prędkością uderzenia przy rozciąganiu
    Autorzy:
    Rodriguez-Martinez, J. A.
    Rusinek, A.
    Arias, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/279460.pdf
    Data publikacji:
    2009
    Wydawca:
    Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
    Tematy:
    critical impact velocity
    RK model
    dynamic tension
    Opis:
    In the present paper, a numerical study on the influence of strain hardening on the Critical Impact Velocity (CIV) in tension is conducted. Finite element code ABAQUS/Explicit is used to carry out numerical simulations of dynamic tension tests in a wide range of impact velocities up to that corresponding to the CIV. The constitutive relation due to Rusinek and Klepaczko (2001) has been used to define the material behaviour. Strain hardening parameters of the RK model were varied during the simulations. Numerical results are compared with those obtained from the analytical description of CIV proposed by Klepaczko (2005). Satisfactory agreement is found between numerical and analytical approaches. The analysis allows for a better understanding of the causes responsible of the CIV appearance.
    Praca przedstawia numeryczną analizę wpływu umocnienia odkształceniowego na krytyczną prędkość uderzenia (CIV) przy rozciąganiu. W symulacjach zastosowano oprogramowanie ABAQUS/Explicit oparte na metodzie elementów skończonych. Obliczeń dokonano dla dynamicznych obciążeń rozciągających w szerokim zakresie prędkości uderzenia aż do osiągnięcia wartości krytycznej (CIV). Do opisu materiału próbki użyto równań konstytutywnych modeli Rusinka-Klepaczki. Podczas analizy zmieniano parametry umocnienia odkształceniowego opisanego tym modelem. Wyniki symulacji numerycznych porównano z analitycznym opisem CIV zaproponowanym przez Klepaczkę (2005). Uzyskano zadawalającą zgodność pomiędzy symulacją a teorią. Przedstawiona analiza przyczynia się do lepszego zrozumienia zjawisk odpowiedzialnych za powstawanie krytycznej prędkości uderzenia (CIV).
    Źródło:
    Journal of Theoretical and Applied Mechanics; 2009, 47, 3; 645-665
    1429-2955
    Pojawia się w:
    Journal of Theoretical and Applied Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic and Heat Capacity Study of the new $Gd_{1-x}Ce_xNi_5$ Series
    Autorzy:
    Dzubinska, A.
    Reiffers, M.
    Espeso, J.
    Rodríguez Fernández, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1398287.pdf
    Data publikacji:
    2017-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.27.+a
    75.30.-m
    75.30.Mb
    Opis:
    We have prepared a new system of $Gd_{1-x}Ce_xNi_5$ polycrystalline samples with concentrations x =0, 0.2, 0.5, and 0.8 in order to study the influence of different rare-earths substitutions on the ground state connected with spin fluctuations. GdNi₅ is a ferromagnetic compound with $T_{C}=31.8 K$ and CeNi₅ is a well-known spin fluctuation compound without magnetic ordering down to the lowest temperatures. X-ray diffraction study confirms the hexagonal crystal structure and the single phase samples. Magnetic properties (M(T),M(B)) show that an increasing content of Ce depresses the transition temperature, $T_{C}$, down to 4.9 K for x=0.8. The heat capacity measurements confirmed these results.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 4; 997-999
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Computationally-Efficient Design of a Dynamic System-Level LTE Simulator
    Autorzy:
    Munoz, P.
    Bandera, I. de la
    Ruiz, F.
    Luna-Ramirez, S.
    Barco, R.
    Toril, M.
    Lázaro, P.
    Rodriguez, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/226262.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    LTE
    simulator
    RRM
    network
    link-level
    system-level
    E-UTRAN
    Opis:
    The Long-Term Evolution (LTE) is the next generation of current mobile telecommunication networks. LTE has a new flat radio-network architecture and a significant increase in spectrum efficiency. In this paper, a computationally-efficient tool for dynamic system-level LTE simulations is proposed. A physical layer abstraction is performed to predict link-layer performance with a low computational cost. At link layer, there are two important functions designed to increase the network capacity: Link Adaptation and Dynamic Scheduling. Other Radio Resource Management functionalities such as Admission Control and Mobility Management are performed at network layer. The simulator is conceived for large simulated network time to allow evaluation of optimization algorithms for the main network-level functionalities.
    Źródło:
    International Journal of Electronics and Telecommunications; 2011, 57, 3; 347-358
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Indirect RKKY-Type Interaction by Direct Oxygen Hopping
    Autorzy:
    Rodriguez-Nuńez, J.
    Coqblin, B.
    Beck, H.
    Konior, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1930566.pdf
    Data publikacji:
    1994-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    74.20.Mn
    74.25.Jb
    Opis:
    The three-band Emery model, describing the holes in the CuO$\text{}_{2}$ planes of the high-temperature superconducting oxides, is considered. The model includes the direct oxygen-oxygen hopping integral t$\text{}_{pp}$. The exact Bogolyubov transformation is used to exclude one oxygen band and obtain a two-dimensional Anderson model. Afterward, the effective Hamiltonian is obtained by eliminating the second oxygen band with the use of two approximate canonical transformations. The effective Hamiltonian describes the spins residing on the copper sites and interacting through an indirect interaction J$\text{}_{SX}$(R), where R is the distance between two copper ions. J$\text{}_{SX}$(R) depends on the doping rate δ and is a decaying function of R. Numerical results for J$\text{}_{SX}$(R) are given for different doping rates δ for the case of parabolic bands. The obtained interaction J$\text{}_{SX}$(R), when added to the original antiferromagnetic interaction (present in oxides at δ = 0), might lead to a frustration of the long-range antiferromagnetic ordering upon doping.
    Źródło:
    Acta Physica Polonica A; 1994, 85, 2; 317-322
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental characterisation and modelling of the thermo-viscoplastic behaviour of steel AISI 304 within wide ranges of strain rate at room temperature
    Modelowanie i doświadczalna weryfikacja termo-lepkosprężystych właściwości stali AISI 304 w szerokim zakresie prędkości odkształceń w temperaturze pokojowej
    Autorzy:
    Rusinek, A.
    Rodriguez-Martinez, J. A.
    Pesci, R.
    Capelle, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/280611.pdf
    Data publikacji:
    2010
    Wydawca:
    Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
    Tematy:
    steel AISI 304
    strain rate sensitivity
    extended RK model
    constitutive relation
    thermal imaging
    Opis:
    In this investigation, thermo-viscoplastic behaviour of austenitic steel AISI 304 has been characterised in tension under wide ranges of strain rate at room temperature. This metal possesses an elevated strain hardening rate and ductility which enhance its capability for absorbing energy under mechanical loading. It has been observed that the rate sensitivity of the material is independent of plastic strain. Moreover, it has been noticed that beyond a certain level of loading rate the flow stress of the material sharply increases. In agreement with experimental evidences reported in the literature, this behaviour is assumed to be caused by the drag deformation mode taking place at high strain rates. Based on such considerations, the thermo-viscoplastic behaviour of the material has been macroscopically modelled by means of the extended Rusinek-Klepaczko model to viscous drag effects. Satisfactory matching has been found between the experiments and analytical predictions provided by the constitutive relation.
    W pracy scharakteryzowano termo-lepkosprężyste właściwości stali AISI 304 na podstawie prób rozciągania dla szerokiego zakresu prędkości odkształceń w temperaturze pokojowej. Stal ta posiada podwyższoną ciągliwość i stopień umocnienia odkształceniowego, które to cechy powiększają jej zdolność do pochłaniania energii mechanicznej. Zaobserwowano, że wrażliwość stali na tempo obciążeń jest niezależna od wartości odkształceń plastycznych. Co więcej, zauważono, że powyżej pewnej prędkości zmian obciążenia naprężenie płynięcia materiału gwałtownie rośnie. W zgodzie z rezultatami badań doświadczalnych opisanymi w literaturze założono, że zachowanie takie wywołane jest pojawieniem się tłumionej postaci deformacji charakterystycznej dla wysokich prędkości odkształcenia. Na podstawie przeprowadzonych badań zaproponowano makroskopowy model termo-lepkosprężystych właściwości stali w oparciu o rozszerzony model Rusinka-Klepaczki dla odzwierciedlenia efektu oporu wiskotycznego. Otrzymano zadawalającą korelację pomiędzy wynikami uzyskanymi z konstytutywnego modelu materiału oraz rezultatami badań doświadczalnych.
    Źródło:
    Journal of Theoretical and Applied Mechanics; 2010, 48, 4; 1027-1042
    1429-2955
    Pojawia się w:
    Journal of Theoretical and Applied Mechanics
    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:
    Multifractality in Fock Space of the Ground State of the Bose-Hubbard Hamiltonian
    Autorzy:
    Lindinger, J.
    Rodríguez, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1030013.pdf
    Data publikacji:
    2017-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    multifractality
    localisation in Fock space
    quantum phase transitions
    Opis:
    We present a first study of the multifractal properties of the ground state of the Bose-Hubbard Hamiltonian in Fock space. Numerical simulations of system sizes up to L=10 at unit filling suggest that multifractality is present for all values of the bosonic interaction strength. Moreover, the analysis of the generalised fractal dimensions for different densities exposes qualitatively the superfluid to Mott insulator phase transition.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 6; 1683-1687
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Los desafíos. O sobre las tareas que nos inspira el legado del Profesor Andrzej Dembicz (1939-2009)
    Challenges, or, the Work that Inspires us the Legacy of Professor Andrzej Dembicz (1939-2009)
    Autorzy:
    RODRÍGUEZ ABRAHAM, Francisco J.
    Powiązania:
    https://bibliotekanauki.pl/articles/486162.pdf
    Data publikacji:
    2010
    Wydawca:
    Uniwersytet Warszawski. Wydawnictwa Uniwersytetu Warszawskiego
    Źródło:
    Revista del CESLA. International Latin American Studies Review; 2010, 1, 13; 69-71
    1641-4713
    Pojawia się w:
    Revista del CESLA. International Latin American Studies Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Rosario Sevilla Soler: La Revolución Mexicana y la opinión pública española. La prensa sevillana frente al proceso de insurrección
    Autorzy:
    Rodríguez Abraham, Francisco J
    Powiązania:
    https://bibliotekanauki.pl/articles/2081336.pdf
    Data publikacji:
    2007
    Wydawca:
    Uniwersytet Warszawski. Wydział Neofilologii
    Opis:
    -
    Źródło:
    Itinerarios; 2007, 5; 217-219
    1507-7241
    Pojawia się w:
    Itinerarios
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Discourse Markers and Modal Expressions in Speakers with and without Asperger Syndrome: A Pragmatic-Perceptive Approach
    Autorzy:
    Muñoz, Francisco J. Rodríguez
    Powiązania:
    https://bibliotekanauki.pl/articles/620592.pdf
    Data publikacji:
    2014-03-01
    Wydawca:
    Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
    Tematy:
    Asperger syndrome
    discourse markers
    modal expressions
    perceptive pragmatics
    Opis:
    From a theoretical point of view, this paper offers a new framework for the analysis of discourse markers: a pragmatic-perceptive model that emphasizes the point of the communication process in which such particles become more relevant. Furthermore, this approach tries to give an account of the modal expressions (attenuators and intensifiers) that speakers use in oral speech. The quotients of absolute and relative frequency with regard to the use of textual, interactive and enunciative markers - focused on the message, the addressee and the addresser respectively - are compared in two samples of 20 subjects with typical development and other 20 with Asperger syndrome. The general results of this research suggest that these latter speakers display a suitable command of textual markers, whereas they overexploit the enunciative ones in conversation.
    Źródło:
    Research in Language; 2014, 12, 1; 1-25
    1731-7533
    Pojawia się w:
    Research in Language
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ichnofabric characterization in cores : a method of digital image treatment
    Autorzy:
    Rodríguez-Tovar, F. J.
    Dorador, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/191872.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    trace fossils
    image treatment
    ichnofabric approach
    ichnofabric attributes and representations
    Opis:
    Ichnofabric analysis, as a relatively young ichnological approach, has witnessed rapid growth, showing its usefulness in basin analysis, with special attention to palaeoenvironmental interpretations. The ichnofabric approach has evolved from the description of trace composition and the intensity of bioturbation to integrate detailed information on numerous ichnofabric features, such as primary sedimentary structures, ichnological diversity, ichnological features, cross-cutting relation ships or tiering structures. This development has been associated with its application to the study of deep-sea sediments, especially in research on cores, which is not easy, owing to the particular features of cores. Here a method for improving ichnofabric characterization in modern marine cores is presented, on the basis of digital high-resolution image treatment, with special emphasis on the quantification of ichnofabric attributes. The proposed methodology is based on the modification of three image adjustments (image adjustment), the estimation of the percentage of the area occupied by bioturbation (digital estimation), the lateral and vertical quantification and comparison of pixel values for the infill of the trace fossils and the host sediment (pixel counting), and the integration of the information obtained in the visual representations of ichnofabrics (the ichnofabric representation). The sequential application of these proposed steps allow, 1) better identification of trace fossils, together with cross-cutting relation ships and the characterization of trace-fossil assemblages, 2) estimation of the percent age of bioturbation associated to each ichnotaxon, the whole ichnocoenosis, or a complete ichnofabric, 3) differentiation between biodeformational structures and trace fossils, discrimination between ichnotaxa, distinction between passively and actively infilled structures, and 4) evaluation of the depth of penetration by particular tracemakers.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2015, 85, 3; 465-471
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Telematics in a transportation system based on pipelines in the oil industry, case study of Cuba
    Autorzy:
    Martinez-Rodriguez, D.
    Szpytko, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/393749.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Stowarzyszenie Telematyki Transportu
    Tematy:
    control systems
    pipeline transport systems
    oil industry
    system kontroli
    system transportu rurociągów
    przemysł naftowy
    Opis:
    The paper subject is the concept of a system for monitoring the operation of a pipeline transport network using telematics for the needs of the oil industry on a selected example. Transport telematics allows to deliberately influence the proces of moving cargo/ data using the elaborated deliberate decisions, as a result of the prior analysis of information and knowledge obtained using a dispersed system of sensors associated with means of pipeline transport, infrastructure, environment and man. The concept of the process of monitoring the technical condition of pipelines for the purpose of ensuring the required efficiency of the transport system and decisions regarding the process of their operation using a dedicated distributed monitoring system of selected operational parameters will be presented. In particular, the paper will focus on the location and categorization of pipe damages.
    Źródło:
    Archives of Transport System Telematics; 2018, 11, 2; 30-36
    1899-8208
    Pojawia się w:
    Archives of Transport System Telematics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hankel convolution on distribution spaces with exponential growth
    Autorzy:
    J. Betancor, Jorge
    Rodríguez-Mesa, Lourdes
    Powiązania:
    https://bibliotekanauki.pl/articles/1221085.pdf
    Data publikacji:
    1996
    Wydawca:
    Polska Akademia Nauk. Instytut Matematyczny PAN
    Tematy:
    Hankel transform
    Hankel convolution
    distribution
    Bessel functions
    Opis:
    We study the Hankel transformation and Hankel convolution on spaces of distributions with exponential growth.
    Źródło:
    Studia Mathematica; 1996, 121, 1; 35-52
    0039-3223
    Pojawia się w:
    Studia Mathematica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Odyssey of a Diptych. Issues of Authorship and Provenience of the Virgen Dolorosa and the Cristo Coronado de Espinas from the Former Collection in Gołuchów
    Wędrówka dyptyku. Problem autorstwa i proweniencji wizerunków „Mater Dolorosa” i „Chrystusa cierniem koronowanego” z dawnej kolekcji w Gołuchowie
    Autorzy:
    Rojewski, Oskar J.
    Diéguez-Rodríguez, Ana
    Powiązania:
    https://bibliotekanauki.pl/articles/23352235.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Instytut Sztuki PAN
    Tematy:
    Prymitywiści niderlandzcy
    Albrecht Bouts
    sztuka XVI w.
    Chrystus cierniem koronowany
    Mater Dolorosa
    Flemish primitives
    16th-Century art
    Christ Crowned with Thorns
    Opis:
    This paper aims to gather all information about the diptych of Mater Dolorosa and Christ Crowned with Thorns, which until 2023 stayed in the Provincial Museum of Pontevedra (Museo Provincial de Pontevedra) in Spain. The research addresses two aspects of the diptych: the controversy of its attribution to a circle of Albrecht Bouts or his follower and the diptych’s arrival at the Provincial Museum of Pontevedra. This study explains that this diptych’s former attributions cannot be supported due to his style and the new research about Bout’s workshop practices. Finally, it gathers all the documentary sources about its arrival at the Pontevedra Museum.
    Wędrówka dyptyku. Problem autorstwa i proweniencji wizerunków „Mater Dolorosa” i „Chrystusa cierniem koronowanego” z dawnej kolekcji w Gołuchowie. Niniejszy artykuł stanowi analizę dyptyku z przedstawieniami Mater Dolorosa i Chry- stusa cierniem koronowanego, znajdującego się do 2023 r. w kolekcji Museo Provincial de Pontevedra w Hiszpanii. Przeprowadzone badania miały na celu wyjaśnienie dwóch kwestii: kontrowersji związanych z atrybucją dzieła kręgowi Albrechta Boutsa oraz z historią jego identyfikacji i dotarcia na Półwysep Iberyjski. W oparciu o analizę stylistyczną oraz ostatnie badania nad warsztatem rodziny Bouts, Autorzy proponują nową hipotezę na temat pochodzenia obrazów. Badania archiwalne i wnikliwa lek- tura literatury przedmiotu pozwoliły także na wyjaśnienie okoliczności przekazania dyptyku do Muzeum w Pontevedra.
    Źródło:
    Biuletyn Historii Sztuki; 2023, 85, 1; 47-68
    0006-3967
    2719-4612
    Pojawia się w:
    Biuletyn Historii Sztuki
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Protection of Lexicographic Product Graphs
    Autorzy:
    Klein, Douglas J.
    Rodríguez-Velázquez, Juan A.
    Powiązania:
    https://bibliotekanauki.pl/articles/32361746.pdf
    Data publikacji:
    2022-02-01
    Wydawca:
    Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
    Tematy:
    lexicographic product
    weak Roman domination
    secure domination
    total domination
    double total domination
    Opis:
    In this paper, we study the weak Roman domination number and the secure domination number of lexicographic product graphs. In particular, we show that these two parameters coincide for almost all lexicographic product graphs. Furthermore, we obtain tight bounds and closed formulas for these parameters.
    Źródło:
    Discussiones Mathematicae Graph Theory; 2022, 42, 1; 139-158
    2083-5892
    Pojawia się w:
    Discussiones Mathematicae Graph Theory
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Use of phenological and pollen-production data for interpreting atmospheric birch pollen curves
    Autorzy:
    Jato, V
    Rodriguez-Rajo, F.J.
    Aira, M.J.
    Powiązania:
    https://bibliotekanauki.pl/articles/51556.pdf
    Data publikacji:
    2007
    Wydawca:
    Instytut Medycyny Wsi
    Tematy:
    pollen production
    Betula pendula
    airborne pollen
    Betula alba
    flowering period
    phenology
    Betula
    Spain
    birch pollen
    Opis:
    Although aerobiological data are frequently used as a fl owering sign in phenological research, airborne pollen counts are infl uenced by a number of factors affecting pollen curves. A study was made about the reproductive biology of birch and environmental factors infl uencing its pollen release and transport, in order to achieve a reliable interpretation of Betula pollen curves. Aerobiological data were recorded in 2002 and 2003 at two sites in NW Spain and phenological observations were carried out on 20 trees from four Betula populations (three Betula alba L. and one B. pendula Roth.). Pollen production was calculated for six Betula alba trees. Chilling and heat requirements for triggering development were calculated. Due to differences in the geographical location, budbreak and fl owering started fi rst in Betula pendula. The fl owering period lasted from 8-13 days. Reduced pollen output per anther and catkin in individual trees in 2003 prompted a marked decline in overall pollen production. Major differences observed in birch pollen curves were attributed to the infl uence both of weather conditions and pollen transport from areas where the fl owering occurs at a different time. Heat requirements calculated using phenological and aerobiological data were similar when the peak pollen- count date was used.
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2007, 14, 2
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zwiększenie trwałości rolek do formowania rur
    Increasing tool life of rollers for roll forming of tubes
    Autorzy:
    Haduch Suski, Z.
    Lozano Andrade, J.
    García Rodríguez, A.
    González, H. R.
    Rodríguez, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/190630.pdf
    Data publikacji:
    2014
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    rolki
    stal narzędziowa
    rury
    obróbka cieplna
    azotowanie
    obróbka podzerowa
    rolls
    tool steels
    tubes
    heat treatment
    nitriding
    sub-zero treatment
    Opis:
    Przemysł wytwarzania rur stosuje różne metody i techniki ich produkcji, jednak formowanie rur stalowych ze szwem ma największe osiągnięcia na rynku. Podstawowe narzędzie do ich formowania, czyli rolki są tradycyjnie wykonywane ze stali narzędziowych o wysokiej zawartości chromu, na przykład stali narzędziowej D2. Jednak jakość rur nowej generacji wykonywanych ze stali o wyższej wytrzymałości i twardości wymaga zastosowania nowych materiałów przewyższających właściwości mechaniczne stali D2. Zaistniała więc konieczność zmian technologii, przeprojektowania narzędzi, przebadania nowych materiałów i opracowania odpowiedniej obróbki cieplnej, zapewniając im dłuższą żywotność i zmniejszenie przestojów w celu spełnienia oczekiwań produkcyjnych. W niniejszym projekcie zostały przeanalizowane i ocenione najlepsze opcje przedstawione na rynku narzędzi do pracy na zimno w celu zwiększenia żywotności istniejących narzędzi (stal D2). Ocenę przeprowadzono w warunkach laboratoryjnych zbliżonych maksymalnie do parametrów produkcyjnych. Wykorzystano tester do badań tribologicznych (T-05) i wykonano badania dynamiczne (próba Charpy'ego). Wykazano przydatność nowych materiałów i możliwość uzyskania oszczędności.
    Industries engaged in roll forming of tubes apply different methodologies and innovating technologies in order to perform this task, but tubes with welded seams are more profitable. The basic tooling used to roll-form tubes, or rolls, are usually made of a tool steel with a high Chromium content, namely, D2 steel. However, in order to produce higher quality tubes of high-strength steels, higher mechanical properties than those shown by D2 steel are required. As a consequence, new technologies, designs, materials, and heat treatments have emerged so the new requirements are met. This has a direct impact on the costs incurred and the productivity of metalmechanic industries. In this project, various cold work steels were analysed and compared with D2 steel, in order to improve the tool life of rolls for roll forming of tubes. Tribological testing was done with a T-05 block-on-ring setup with testing conditions similar to those in real life. Charpy testing was done in order to obtain impact toughness. The obtained results are of great importance, because they may result on significant cost reductions.
    Źródło:
    Tribologia; 2014, 6; 43-66
    0208-7774
    Pojawia się w:
    Tribologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Economic and environmental viability of building recovery in Seville (Spain). Phase 1: database in Arcgis
    Autorzy:
    Alba-Rodríguez, D.
    Marrero, M.
    Solís-Guzmán, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/344719.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Krakowska im. Tadeusza Kościuszki. Wydział Architektury. Katedra Kształtowania Środowiska Mieszkaniowego
    Tematy:
    renovation
    rehabilitation
    demolition
    environmental viability
    cost evaluation
    Opis:
    The main objective of this work is the design of a model for the technical, economic and environmental evaluation in the rehabilitation and renovation of buildings versus their demolition. A first analysis is performed on the rehabilitation and renovation of buildings versus their demolition in the historical centre of Seville, Spain. Considering that many European cities have a historical centre that in many cases also represents the most authentic part of the city, this project can be adopted as an assessment tool for many similar case studies. In a first stage, a database for Seville, Spain, has been created using ArcGIS, which identifies those buildings needing restoration. The house of tomorrow maybe the one we already inhabit by transforming it with the renovations necessary in order to make it more safe, secure, energy efficient and comfortable, finally transforming it into a contemporary dwelling, even if they are part of a historical city centre.
    Źródło:
    Środowisko Mieszkaniowe; 2013, 11; 297-302
    1731-2442
    2543-8700
    Pojawia się w:
    Środowisko Mieszkaniowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Foraminiferal assemblages as palaeoenvironmental bioindicators in Late Jurassic epicontinental platforms: Relation with trophic conditions
    Autorzy:
    Reolid, M.
    Nagy, J.
    Rodriguez-Tovar, F.J.
    Oloriz, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/22691.pdf
    Data publikacji:
    2008
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    foraminiferal assemblage
    paleoenvironmental bioindicator
    Late Jurassic
    epicontinental platform
    trophic condition
    Jurassic
    Foraminifera
    neritic shelf
    Boreal Realm
    Tethys Ocean
    Opis:
    Foraminiferal assemblages from the neritic environment reveal the palaeoecological impact of nutrient types in relation to shore distance and sedimentary setting. Comparatively proximal siliciclastic settings from the Boreal Domain (Brora section, Eastern Scotland) were dominated by inner−shelf primary production in the water column or in sea bottom, while in relatively seawards mixed carbonate−siliciclastic settings from the Western Tethys (Prebetic, Southern Spain), nutrients mainly derived from the inner−shelf source. In both settings, benthic foraminiferal assemblages increased in diversity and proportion of epifauna from eutrophic to oligotrophic conditions. The proximal setting example (Brora Brick Clay Mb.) corresponds to Callovian offshore shelf deposits with a high primary productivity, bottom accumulation of organic matter, and a reduced sedimentation rate for siliciclastics. Eutrophic conditions favoured some infaunal foraminifera. Lately, inner shelf to shoreface transition areas (Fascally Siltstone Mb.), show higher sedimentation rates and turbidity, reducing euphotic−zone range depths and primary production, and then deposits with a lower organic matter content (high−mesotrophic conditions). This determined less agglutinated infaunal foraminifera content and increasing calcitic and aragonitic epifauna, and calcitic opportunists (i.e., Lenticulina). The comparatively distal setting of the Oxfordian example (Prebetic) corresponds to: (i) outer−shelf areas with lower nutrient input (relative oligotrophy) and organic matter accumulation on comparatively firmer substrates (lumpy lithofacies group) showing dominance of calcitic epifaunal foraminifera, and (ii) mid−shelf areas with a higher sedimentation rate and nutrient influx (low−mesotrophic conditions) favouring potentially deep infaunal foraminifers in comparatively unconsolidated and nutrient−rich substrates controlled by instable redox boundary (marl−limestone rhythmite lithofacies).
    Źródło:
    Acta Palaeontologica Polonica; 2008, 53, 4
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical model to study the valve overlap period in the Wärtsilä 6L 46 four-stroke marine engine
    Autorzy:
    Lamas, M. I.
    Rodríguez, C. G.
    Rebollido, J. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/259055.pdf
    Data publikacji:
    2012
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    four-stroke engine
    computational fluid dynamics (CFD)
    marine engine
    Opis:
    In this paper, a CFD (Computational Fluid Dynamics) analysis was carried out to study the Wärtsilä 6L 46 medium-speed, four-stroke marine engine. For the purpose, the commercial software ANSYS Fluent 6.3 was employed. The aim is to analyze the scavenging of gases, especially during the valve overlap period. Particularly, the pressure, velocity and mass fraction fields were numerically obtained. In order to validate the CFD results, the in-cylinder pressure was successfully compared to experimental measurements for the exhaust, intake and compression strokes of the cylinder operation. This model can be used in future works to improve the performance of these engines because the information provided is very useful to identify regions in which the pressure, velocity or distribution of gases are inadequate. Besides, to compute the quantity of burnt gases which remain inside the cylinder, fresh charge which is expelled through the exhaust valves and study the influence of parameters such as the exhaust and intake pressures, engine speed, cam profile design, etc.
    Źródło:
    Polish Maritime Research; 2012, 1; 31-37
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Incidence of fungals in a vineyard of the denomination of origin ribeiro [Ourense - North-Western Spain]
    Autorzy:
    Fernandez-Gonzales, M
    Rodriguez-Rajo, F.J.
    Jato, V.
    Aira, M.J.
    Powiązania:
    https://bibliotekanauki.pl/articles/49264.pdf
    Data publikacji:
    2009
    Wydawca:
    Instytut Medycyny Wsi
    Tematy:
    wine production
    vineyard location
    North-Western Spain
    Spain
    fungal disease
    grape harvest
    grey mould
    Botrytis cinerea
    powdery mildew
    Uncinula necator
    downy mildew
    Plasmopara viticola
    aerobiology
    grape-vine
    fungal spore
    atmosphere
    spore concentration
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2009, 16, 2; 263-271
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Three-level modulation techniques to reduce instantaneous common mode voltage in induction machines
    Autorzy:
    Cusidó, J.
    Luna, A.
    Busquets, S.
    Bordonau, J.
    Rodríguez, P.
    Romeral, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/262817.pdf
    Data publikacji:
    2007
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
    Tematy:
    common mode voltages
    multilevel inverter
    drive systems
    Opis:
    Problems on inverter motor drives such as bearing currents are introduced due to common mode voltages. Different solutions are proposed on literature, for two-level or multilevel inverter. Instantaneous zero common mode voltage by using a three-level inverted could be achieved. This paper proposes a commutation strategy that allows zero common mode voltage by using medium vectors, and also a new representation as a plane on the commutation space is defined which is called zero common mode voltage plane. On this defined plane, every turning vector fulfil this property. Simulations and experimental results clearly show method's efficiency.
    Źródło:
    Electrical Power Quality and Utilisation. Journal; 2007, 13, 2; 33-38
    1896-4672
    Pojawia się w:
    Electrical Power Quality and Utilisation. Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Betacyanin accumulation and guaiacol peroxidase activity in Beta vulgaris L. leaves following copper stress
    Autorzy:
    Morales, J.M.L.
    Rodriguez-Monroy, M.
    Sepulveda-Jimenez, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/57381.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    betacyanin accumulation
    guaiacol peroxidase activity
    Beta vulgaris
    red beet
    leaf
    copper stress
    oxidative stress
    betacyanin
    abiotic stress
    antioxidant compound
    lipid peroxidation
    copper
    Opis:
    The effect of copper stress on betacyanin accumulation and guaiacol peroxidase (GPOD) activity in leaves of different age was evaluated in red beet (Beta vulgaris L. var. Crosby Egyptian) plants. In hydroponic culture, plants were treated with 0.3 μM (control), 50 μM, 100 μM, and 250 μM of CuSO4 for 6 days. Copper was taken up and accumulated in old roots but was not translocated to leaves. However in young leaves, the increase of lipid peroxidation and reduction of growth were evident from day 3 of copper exposure; whereas in old leaves, the lipid peroxidation and growth were the same from either copper-treated or control plants. In response to copper exposure, the betacyanin accumulation was evident in young leaves by day 3, and continued to increase until day 6. Betacyanin only were accumulated in old leaves until day 6, but the contents were from 4 to 5 times lower than those observed in young leaves at the same copper concentrations. GPOD activity increased 3.3- and 1.4-fold in young and old leaves from day 3 of copper treatment respectively, but only in the young leaves was sustained at the same level until day 6. Old roots shown betacyanin in the control plants, but the betacyanin level and growth were reduced with the copper exposure. In contrast, young roots emerged by copper effect also accumulated copper and showed the highest betacyanin content of all plant parts assayed. These results indicate that betacyanin accumulation and GPOD activity are defense responses to copper stress in actively growing organs.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2012, 81, 3
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Factors involved in the phenological mechanism of Alnus flowering in Central Europe
    Autorzy:
    Rodriguez-Rajo, F J
    Grewling, L.
    Stach, A.
    Smith, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/50984.pdf
    Data publikacji:
    2009
    Wydawca:
    Instytut Medycyny Wsi
    Tematy:
    alder
    Alnus
    flowering
    phenological mechanism
    Central Europe
    Europe
    meteorological parameter
    North Atlantic oscillation
    dormancy
    growth degree day
    modelling
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2009, 16, 2; 277-284
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Prediction of biological sensors appearance with ARIMA models as a tool for Integrated Pest Management protocols
    Autorzy:
    Fernandez-Gonzalez, M.
    Ramos-Valcarcel, D.
    Aira, M.J.
    Rodriguez-Rajo, F.J.
    Powiązania:
    https://bibliotekanauki.pl/articles/50204.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Medycyny Wsi
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2016, 23, 1
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Energy associated tuning method for short-term series forecasting by complete and incomplete datasets
    Autorzy:
    Rodríguez-Rivero, C.
    Pucheta, J.
    Laboret, S.
    Sauchelli, V.
    Patińo, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/91842.pdf
    Data publikacji:
    2017
    Wydawca:
    Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych
    Tematy:
    short time series
    forecasting
    missing data
    energy associated to series
    complete datasets
    incomplete datasets
    Opis:
    This article presents short-term predictions using neural networks tuned by energy associated to series based-predictor filter for complete and incomplete datasets. A benchmark of high roughness time series from Mackay Glass (MG), Logistic (LOG), Henon (HEN) and some univariate series chosen from NN3 Forecasting Competition are used. An average smoothing technique is assumed to complete the data missing in the dataset. The Hurst parameter estimated through wavelets is used to estimate the roughness of the real and forecasted series. The validation and horizon of the time series is presented by the 15 values ahead. The performance of the proposed filter shows that even a short dataset is incomplete, besides a linear smoothing technique employed; the prediction is almost fair by means of SMAPE index. Although the major result shows that the predictor system based on energy associated to series has an optimal performance from several chaotic time series, in particular, this method among other provides a good estimation when the short-term series are taken from one point observations.
    Źródło:
    Journal of Artificial Intelligence and Soft Computing Research; 2017, 7, 1; 5-16
    2083-2567
    2449-6499
    Pojawia się w:
    Journal of Artificial Intelligence and Soft Computing Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The mechanical properties of PVD coatings deposited on nitrided CoCrMo alloy
    Właściwości mechaniczne powłok PVD osadzanych na azotowanym stopie CoCrMo
    Autorzy:
    Ortega-Saenz, J.A.
    Hernandez-Rodriguez, M.A.L.
    Michalczewski, R.
    Smolik, J.
    Szczerek, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/187966.pdf
    Data publikacji:
    2010
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    stop CoCrMo
    azotowanie
    powłoka PVD
    Co-Cr-Mo alloy
    nitriding
    PVD coatings
    Opis:
    The paper concerns the evaluation of mechanical properties of the composite: 'nitrided layer-PAPVD coating' created on CoCrMo alloy intended for biotribological applications. Five nitriding processes with varying nitriding potential (p(N2/H2) =1.0, 1.5, 2.0, 2.5 and 3.0) were selected for optimising. The modulus of elasticity and nanohardness of nitrided layers were measured by nanoindentation. Cross-sections were examined by means of scanning electron microscopy (SEM) in order to determine the thickness and the uniformity of the affected zone after nitriding. The change in surface roughness was studied with the help of 3D roughness parameters obtained by atomic force microscopy (AFM) and the phase composition was determined by means of X-ray diffraction (XRD). It was found that the most suitable properties of the surface layer were achieved by nitriding at p(N2/H2) = 2.5. CrN as well as multilayer (TiN/CrN)x3 PAPVD coatings were deposited onto the substrates with and without nitiriding for evaluation of the nitriding effect on the adhesion. CoCrMo alloy nitrided sample was included for comparison. All these conditions were characterised by means of AFM, nanohardness, SEM, and scratch test. The duplex technology applied to CoCrMo orthopaedic alloy allows for a significant increase of the adhesion of the PAPVD coatings and the improvement of the load carrying capacity of the CoCrMo orthopaedic alloy.
    Artykuł dotyczy oceny mechanicznych właściwości kompozytu warstwa azotowana/powłoka PVD utworzonego na stopie ortopedycznym CoCrMo stosowanym w aplikacjach biotribologicznych. Przeprowadzono optymalizację procesu azotowania dla potencjału azotowego wynoszącego (p(N2/H2) = 1,0, 1,5, 2,0, 2,5 i 3,0). Dla uzyskanych warstw azotowanych wykonano pomiary modułu elastyczności i nanotwardości. W celu oceny grubości i jednorodności uzyskanych warstw wykonano obserwacje mikroskopowe (SEM) przekrojów poprzecznych. Zmiany chropowatości powierzchni zostały ocenione za pomcą stereometrycznych parametrów mierzonych z wykorzystaniem mikroskopii sił atomowych (AFM), natomiast zmiany składu fazowego za pomocą dyfrakcji rentgenowskiej (XRD). Uzyskane wyniki wskazały, że najkorzystniejsze właściwości warstwy wierzchniej uzyskano dla potencjału p(N2/H2), wynoszącego 2,5. Dokonano oceny wpływu azotowania podłoża na adhezję powłoki CrN oraz (TiN/CrN)x3 osadzanych metodą PAPVD z wykorzystaniem technik AFM, nanotwardościomierza, SEM oraz scratchtestu. Wykazano, że technologia duplex stosowana do ortopedycznego stopu CoCrMo? pozwala na znaczne zwiększenie adhezji powłok PAPVD oraz poprawę jego właściwości przeciwzużyciowych.
    Źródło:
    Tribologia; 2010, 3; 173-186
    0208-7774
    Pojawia się w:
    Tribologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Relative infaunal bivalve density assessed from split beam echosounder angular information
    Autorzy:
    Sanchez-Carnero, N.
    Rodriguez-Perez, D.
    Zaragoza, N.
    Espinosa, V.
    Freire, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/48622.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    shellfish
    bivalve
    textural feature
    stock assessment
    acoustic technique
    split-beam echosounder
    mapping
    monitoring
    Źródło:
    Oceanologia; 2014, 56, 3
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dynamics of methane fermentation process and retention time for different agricultural substrates
    Autorzy:
    Lewicki, A.
    Dach, J.
    Janczak, D.
    Czekała, W.
    Rodríguez Carmona, P. C.
    Powiązania:
    https://bibliotekanauki.pl/articles/335195.pdf
    Data publikacji:
    2013
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych
    Tematy:
    biogas plants
    agricultural substrates
    methane fermentation process
    retention time
    experimentation
    Polska
    Opis:
    A hydraulic retention time (retention) also known as HRT is one of the most important parameter in biogas plant exploitation. In practice, there are many substrates with different HRT used in agricultural biogas plant which makes difficulties in fermentation process optimization. The aim of this study was to investigate and compare the efficiency of biomethane production and to determine the dynamics of the fermentation process expressed by reaching 60, 80, 90 and 100% of HRT. The results showed very big differences in efficiency of methane production as well as HRT duration between analyzed substrates. The total fermentation period (100% of HRT) for investigated substrates amounted average 31,5 day (range: 21-41 days). However production of last 10% of methane average out 28%. It proves very low dynamics of fermentation process in the last phase.
    Źródło:
    Journal of Research and Applications in Agricultural Engineering; 2013, 58, 2; 98-102
    1642-686X
    2719-423X
    Pojawia się w:
    Journal of Research and Applications in Agricultural Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New findings of airborne fungal spores in the atmosphere of Havana, Cuba, using aerobiological non-viable methodology
    Autorzy:
    Almaguer-Chaves, M.
    Aira, M.J.
    Rojas, T.-I.
    Fernandez-Gonzalez, M.
    Rodriguez-Rajo, F.-J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2081740.pdf
    Data publikacji:
    2018
    Wydawca:
    Instytut Medycyny Wsi
    Tematy:
    airborne fungal spores
    non-viable methodology
    Havana
    Cuba
    Opis:
    Introduction. Although airborne fungal diversity in tropical countries is known to be considerable, aerobiological research to-date has identified only a part of the fungal mycobiota that may have an impact both on human health and on crops. Previous studies in Havana city identified only 30 genera and 5 spore types; therefore,new research is required in these latitudes. This study sought to investigate airborne spore levels in Havana, with a view to learning more about local fungal diversity and assessing its influence in quantitative terms. Materials and method. A Hirst type volumetric sampler was located on the rooftop of a building 35 meters above ground level, in a busy area of the city. Sampling was carried out continuously (operating 24hours/day), at 10 L per minute during the year 2015. The fungal spores were collected on a Melinex tape coated with a 2% silicone solution. The results were expressed as spores per cubic meter (spores/m3) of air when to referring to daily values, and spores count if referring to annual value. Results. Fourteen new genera were identified in the course of volumetric sampling: six produce ascospores and eight conidia. Morphobiometric characteristics were noted for all genera, and airborne concentrations were calculated. These genera accounted for 56.4% of relative fungal frequency over the study year. Conclusions. Many airbone fungi are primary causes of both respiratory disease and crop damage. These new findings constitute a major contribution to Cuba’s aerobiological database.
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2018, 25, 2; 349-359
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thirty-four identifiable airborne fungal spores in Havana, Cuba
    Autorzy:
    Almaguer, M.
    Aira, M.-J.
    Rodriguez-Rajo, F.J.
    Fernandez-Gonzalez, M.
    Rojas-Flores, T.I.
    Powiązania:
    https://bibliotekanauki.pl/articles/51658.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Medycyny Wsi
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2015, 22, 2
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Unconformity surfaces in pelagic carbonate environments : A case from the Middle Bathonian of the Betic Cordillera, SE Spain
    Autorzy:
    Nieto, L. M.
    Rodríguez-Tovar, F. J.
    Molina, J. M.
    Reolid, M.
    Ruiz-Ortiz, P. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/191710.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    Unconformity
    pelagic swell
    softground
    firmground
    hardground
    Middle-Late Jurassic
    Betic External Zone
    Opis:
    Integrative studies of sedimentary and palaeontological topics for unconformity surfaces are useful in basin analysis. A middle Bathonian unconformity surface in the Ammonitico Rosso facies cropping out in the La Mola Unit (Subbetic Domain, Betic External Zone) was studied by integrating ichnological, palaeotectonic, and sedimentological analyses to decipher sea-level, tectonic, and palaeogeographic conditions during its development. The trace-fossil assemblage mainly consists of the Glossifungites (Thalassinoides, Arenicolites, and Gastrochaenolites) and Trypanites ichnofacies elements. Probable Ophiomorpha represents previous softground stages, Thalassinoides and Arenicolites were formed in firmground, Gastrochaenolites reflects an evolved firmground or early hardground, and Trypanites can be attributed to an incipient hardground. The degree of firmness, relative sea-level position, and continuity of deposition were related. The softground stage corresponds to a fall in relative sea level and continued deposition. The firmground (semi-consolidated substrate) probably reflects an extremely low sea level characterized by non-deposition, whereas the incipient hardground stage indicates an initial phase of relative sea-level rise, with an increase in marine current energy. The presence of two neptunian dyke systems reflects significant tectonic activity related to the transtensional deformation that affected the South Iberian Palaeomargin. Lateral variations in sedimentological and ichnological features recorded at similar discontinuity surfaces in nearby areas were considered and related to differences in bottom topography, with associated changes in sedimentation, and to the variable duration of the hiatus.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2014, 84, 3; 281-295
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mental health of Filipino seafarers: the contributory factors and the strategies applied onboard ship
    Autorzy:
    Sarinas, B. G. S.
    Botante, J. D. D.
    Nacion, J. S.
    Bernas, M. L. B.
    Rodriguez, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/2172470.pdf
    Data publikacji:
    2022
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    mental health
    seafarers
    Filipino
    onboard test
    stress fatigue
    seafarers problems
    Opis:
    Mental health is equally important with physical health. Many reports found out that poor mental health is one of the major factors of depression among seafarers. This study ascertains the factors affecting mental health and the strategies applied by Filipino seafarers to combat these issues. A survey was used as a research design. A total of 100 seafarers taken through convenience and snowball sampling answered the validated researcher-made questionnaire. The questionnaire was sent in the JBLFMU Alumni Portal, messenger, and Gmail. Frequency, percentage, and rank were used. Themes were used to classify the strategies applied by seafarers to counteract mental health issues onboard ship. The results revealed that the major contributory factor affecting the mental health of Filipino seafarers is stress, while they believed that a positive outlook in life makes one’s self free from mental health problems onboard. The top three factors are stress, fatigue, and separation from families and friends. The top three strategies to counteract factors that affect seafarers’ mental health onboard ship are staying positive, socializing with crewmates, and communicating with family.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2022, 16, 1; 125--134
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Iron-superoxide dismutase from pepper: biochemical characterization, cell localization and tissue distribution
    Autorzy:
    Rodriguez-Ruiz, M.
    Alvarez de Morales, P.
    del Rio, L.
    Corpas, F.
    Palma, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/80920.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    conference
    iron-superoxide dismutase
    pepper
    Capsicum annuum
    biochemical characteristics
    tissue distribution
    stress condition
    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:
    An ethnobotanical study of medicinal plants used in Zacatecas state, Mexico
    Autorzy:
    Reimers, E.
    Cusimamani, E.
    Rodriguez, E.
    Zepeda del Valle, J.
    Polesny, Z.
    Pawera, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/57841.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Opis:
    Despite the fact that Mexico has vast biocultural biodiversity, there are numerous regions where the traditional medicinal use of plants has not yet been studied. We aimed to document, analyze quantitatively, and preserve medicinal plant knowledge among local people living in over 40 communities in the state of Zacatecas. Ethnobotanical information was collected by semistructured interviews with 132 informants. Data were analyzed using standard quantitative indices such as relative frequency of citation, family importance value, cultural importance index, and informant consensus factor. We recorded 168 medicinal plant taxa belonging to 151 genera and 69 botanical families and used to treat 99 health disorders. The most medicinally important plant families were Asteraceae (20 species), followed by Fabaceae and Lamiaceae (12 species) and Cactaceae (five species). The most culturally important species was Matricaria chamomilla L., mentioned 140 times, followed by Arnica montana L. (62 times) and Artemisia ludoviciana Nutt (48 times). The highest consensus for use was for diseases of the reproductive system. The type of disorder for which there was the highest number of references for use (389; 25% of all uses) and plant species (67) were diseases of the digestive and gastrointestinal system. The present study represents the first quantitative medical-ethnobotanical documentation and analysis of the traditional use of medicinal plants in Zacatecas state. Despite the semiarid climate, this region is botanically highly diverse, and its flora have versatile medicinal uses.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2018, 87, 2
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Forecasting ARIMA models for atmospheric vineyard pathogens in Galicia and Northern Portugal: Botrytis cinerea spores
    Autorzy:
    Fernandez-Gonzalez, M.
    Rodriguez-Rajo, F.J.
    Jato, V.
    Aira, M.J.
    Ribeiro, H.
    Oliveira, M.
    Abreu, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/49793.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Medycyny Wsi
    Opis:
    Botrytis cinerea is the cause of the most common disease in the Galician and Portuguese vineyards. Knowledge of the spore levels in the atmosphere of vineyards is a tool for forecasting models of the concentration of spores in order to adjust the phytosanitary treatments to real risk infection periods. The presented study was conducted in two vineyards, one located in Cenlle (Spain) and other in Amares (Portugal), from 2005-2007. A volumetric trap, model Lanzoni VPPS-2000, was used for the aerobiological study. Phenological observations were conducted on 20 vines of three grape varieties in Cenlle (Treixadura, Godello and Loureira) and in Amares (Trajadura, Loureiro and Pedernã), by using the BBCH scale. The highest total spore concentrations during the grapevine cycle were recorded in 2007 in both locations (Cenlle:16,145 spores; Amares:1,858 spores), and the lowest, in 2005 in Cenlle (1,700 spores) and in Amares (800 spores) in 2006. In Cenlle, the best adjusted model was an ARIMA (0,2,2), including the relative humidity four days earlier, while in Amares there was an ARIMA (1,2,3), considering the relative humidity three days earlier and rainfall two days earlier. The t-test showed no significant difference between observed and predicted data by the model.
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2012, 19, 2
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    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:
    Transcriptome analysis of enzyme activities regulating ROS metabolism in olive (Olea europaea L.) reproductive tissues
    Autorzy:
    Zafra, A.
    Carmona, R.
    Jimenez-Quesada, M.
    Traverso, J.
    Castro, A.
    Rodriguez-Garcia, M.
    Bautista, R.
    Claros, M.
    Alche, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/80459.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    conference
    transcriptome
    enzyme activity
    reactive oxygen species
    metabolism
    olive
    Olea europaea
    reproductive tissue
    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:
    New association between Amblyomma parvitarsum (Acari: Ixodidae) and the endemic lizard Liolaemus eleodori (Iguania: Liolaemidae) in Argentina
    Autorzy:
    Castillo, G.N.
    Acosta, J.C.
    Rodríguez-Munoz, M.
    Martínez, T.
    Gonzalez-Rivas, C.
    Nava, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/5570.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Źródło:
    Annals of Parasitology; 2019, 65, 1
    0043-5163
    Pojawia się w:
    Annals of Parasitology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Simultaneous measurement of evaporating fuel spray using laser induced exciplex fluorescence
    Autorzy:
    Martine--Martínez, S.
    Sánchez-Cruz, F. A
    Rodríguez-Morales, G.
    Riesco-Ávila, J. M.
    Gallegos-Munoz, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/243044.pdf
    Data publikacji:
    2007
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    thermal engine
    direct injection
    liquid phase
    vapour phase
    penetration length
    Opis:
    A macroscopic analysis of experimental measurements offuel sprays penetration on evaporating conditions using the Laser Induced Fluorescence Planar technique is presented. A pure fuel and tracers have been used to determine the two-phase process of the spray by characterizing the wavelengths they display when excited by a laser beam. An experimental set-up based on a single cylinder engine [1, 2], an Nd:YAG laser, an image acquisition system and a system of injection common rail have been used to carry out the experimental processes. Experimental results show the behaviour of the vapour phase and liquid phase in the spray under different thermodynamic conditions and injection parameters in the combustion chamber, particularly the work-fluid density and the injection pressure were observed. The measurement of these parameters is of interest to design the combustion chamber geometry and the piston bowl features of modern direct injection Diesel engines. In particularly, the sschematic diagram and main components of the equipment, cross-sectional view of the cylinder head, experimental layout of PLIEF imaging tests and images, examples of the liquid phase and vapour phase penetration, maximum penetration of the liquid and vapour phase as function of the work fluid density, Maximum penetration of the phase as function of the work fluid density, maximum penetration of the liquid and vapour phase as function of the injection pressure are presented in the paper.
    Źródło:
    Journal of KONES; 2007, 14, 2; 315-326
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    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:
    Two cases of phase-shifting interferometry for wave front recovery from heterodyne hologram storage: piezoelectric transducer and modulation of polarization
    Autorzy:
    Rodríguez-Zurita, G.
    Vázquez-Castillo, J. F.
    Toto-Arellano, N. I.
    Calderón-Hernández, G.
    Barojas-Gutiérrez, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/173402.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    holographic interferometry
    phase-shifting
    polarization
    Opis:
    Heterodyne holographic interferometry is a well-known interferometric technique for high precision measurements of the phase difference between two recorded wave fronts. These wave fronts are typically registered at a given distance from the object under inspection. Although the affinity of heterodyne techniques with the phase-shifting ones is immediate, reports on concrete implemented set-ups from the former type of techniques as adaptations into the second type seems to be not so widely spread as convenient. To illustrate this point, in this communication we demonstrate two phase-shifting methods as applied to heterodyne holograms, each variant using a different shifting method for phase shifting. One method is based on a conventional piezoelectric stack transducer and the other method comprises modulation of polarization. The alternatives that these two techniques offer could be of direct benefit in dynamic holography.
    Źródło:
    Optica Applicata; 2017, 47, 4; 579-590
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Microdamage distribution in fatigue fractures of bone allografts following gamma-ray exposure
    Autorzy:
    Presbítero, G.
    Hernandez-Rodríguez, M. A. L.
    Contreras-Hernandez, G. R.
    Vilchez, J. F.
    Susarrey, O.
    Gutiérrez, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/307297.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    rozkład Weibulla
    pękanie zmęczeniowe
    promieniowanie gamma
    kość korowa
    mikrouszkodzenia
    allografts
    Weibull distribution
    fatigue fracture
    gamma radiation
    cortical bone
    microdamage
    Opis:
    Although clear evidence of significant differences in bone properties have been extensively studied, results vary under the ranges usually used for sterilization purposes (25-35 kGy). Hence, the aim of this work was the study of the mechanical properties and microdamage development of human bones used as allografts following gamma-ray exposure, followed by an extensive statistical analysis of microdamage effects in fatigue behaviour. Methods: Specimens of the cortical region of human femurs were exposed to 15-25 kGy and 26-30 kGy radiation levels, then they were subjected to compression fatigue tests until fracture. The fatigue life was determined in relation to the radiation level, and the evolution of microdamage was assessed through fluorescence microscopy in order to calculate characteristic lengths of microcracks. Results: Significant differences in fatigue life were detected (p < 0.05) between non-radiated (control) and radiated specimens, resulting in a drastic 89.2% fatigue life reduction of the 15-25 kGy group, and 95.3% in the 26-30 kGy group in comparison to the control. Microdamage analysis showed a considerable increase in microcrack lengths when bone was exposed to gamma radiation, which may indicate that bones used as allografts could fracture at some point when subjected to in vivo loading conditions. Conclusions: The results of our research indicate that, even if a range of 15-25 kGy is suggested to sterilize bone allografts, such practice needs to be reconsidered. In addition, with use of Weibull distribution, this work describes the conditions in which microcracks grow towards the fracture of bones in relation to the decrease in their mechanical properties.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2017, 19, 4; 43-53
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hydrogen and methane production from whey
    Wodór i metan produkowany z serwatki
    Autorzy:
    Kozłowski, K.
    Dach, J.
    Lewicki, A.
    Cieślik, M.
    Czekała, W.
    Janczak, D.
    Smurzyńska, A.
    Rodríguez Carmona, P. C.
    Powiązania:
    https://bibliotekanauki.pl/articles/336367.pdf
    Data publikacji:
    2016
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych
    Tematy:
    power engineering
    biohydrogen
    hydrogen production
    biogas
    methane
    energetyka
    biowodór
    produkcja wodoru
    biogaz
    metan
    Opis:
    Decreasing amount of fossil fuels in the world encourages the searching of alternative energy sources. In this time of energetic crisis, the production of hydrogen is an interesting solution. Hydrogen does not produce any contaminating emission. The aim of this study was to build a project installation that produces gas biofuels and define the potential biohydrogen and biogas possible to produce from the waste of a dairy plant. The calculations assume a production of 400 m3 per day of whey permeate from the dairy plant. The methane fermentation process was carried out according to the modified German standard DIN 38 414/S8 in the eco-technology laboratory in the Poznan University of Life Sciences. The results revealed that, with the assumed quantity of available substrate, it is possible to generate 1 570 960 m3 of hydrogen per year and 4 749 469 m3 of biogas with a methane percentage of approx. 49%. Based on these results it could be possible to build a biogas plant of an estimated power of 0,99 MW of electricity and 1,12 MW of heat, as well as the hydrogen fuel cell power of 0,32 MW of electricity.
    Kończące się zasoby paliw kopalnych skutkują sytuacją, w której świat staje w obliczu konieczności poszukiwania nowych, alternatywnych źródeł energii. W czasach kryzysu energetycznego interesującym rozwiązaniem wydaje się być produkcja i wykorzystanie wodoru, który zarówno w wyniku spalenia, jak i wykorzystania w ogniwie paliwowym nie emituje zanieczyszczeń środowiska. Celem pracy było określenie możliwych do wyprodukowania ilości biowodoru oraz biogazu z mleczarskiego odpadu poprodukcyjnego. W obliczeniach uwzględniono umiejscowienie instalacji przy zakładzie mleczarskim produkującym dziennie 400 m3 permeatu serwatkowego. Wykorzystano ponadto wyniki badań przeprowadzonych w Pracowni Ekotechnologii w Poznaniu uzyskane na podstawie analiz wykonanych zgodnie z obowiązującą niemiecką normą DIN 38 414/S8. Na potrzeby obliczeń posłużono się także danymi zamieszczonymi w najnowszej literaturze przedmiotu. Na postawie uzyskanych wyników wykazano, że z zakładanej ilości dostępnego substratu możliwe będzie wytworzenie rocznie 1 570 960 m3 wodoru oraz 4 749 469 m3 biogazu o procentowej zawartości metanu ok. 49%. W oparciu o te dane obliczono realną moc biogazowni na poziomie 0,99 MW energii elektrycznej oraz 1,12 MW ciepła, a także moc ogniwa paliwowego wynoszącą 0,32 MW energii elektrycznej.
    Źródło:
    Journal of Research and Applications in Agricultural Engineering; 2016, 61, 2; 44-49
    1642-686X
    2719-423X
    Pojawia się w:
    Journal of Research and Applications in Agricultural Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of tree diversity and stand structure on above-ground carbon storage in evergreen broad-leaved and deciduous forests in Southeast Vietnam
    Autorzy:
    Tuan, N.T.
    Rodriguez-Hernandez, D.I.
    Tuan, V.C.
    Quy, N.V.
    Obiakara, M.C.
    Hufton, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2130199.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    Biodiversity assessment
    Ecosystem functioning
    Taxonomic diversity
    Natural forests
    Stand structure
    Opis:
    Understanding the relationship between tree species diversity and above-ground carbon (AGC) storage in tropical forests is essential for a sustainable flow of ecosystem goods and services. Although tropical forests of Vietnam are of particular interest due to their high biodiversity and carbon density, few studies have evaluated the relative importance of species composition, tree species diversity and forest structure on AGC storage by forest vegetation type. In this study, we tested for the influence of taxonomic diversity, forest structure and species composition on AGC storage in evergreen broad-leaved and deciduous forests of Southeast Vietnam. Data was collected within 137 rectangular plots (25 m × 20 m), randomly selected across a deciduous forest (DF) and four evergreen broad-leaved forest (EB) categories, with different standing volumes levels: very poor (EBG), poor (EBP), medium (EBM) and rich (EBR). In total, we identified 3687 individuals from 110 tree species belonging to 46 families in 6.85 hectares of sampled area. AGC storage significantly differed among forest categories, ranging from 14.81 Mg ha−1 in EBG to 146.74 Mg ha−1 in EBR. There was higher AGC in the medium diameter class (20-40 cm), except for EBR where there was higher AGC within individuals of 40-60 cm in diameter. Taxonomic diversity was weakly correlated with AGC while stand structure (stem density and maximum diameter) were strongly correlated. Our results suggest that maintaining the abundance distributions of remnant tree species, particularly that of large trees, is one important method to enhance AGC storage in the tropical ecosytems of southern Vietnam.
    Źródło:
    Dendrobiology; 2022, 88; 38-55
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Możliwości zagospodarowania odpadów zielonych z terenów aglomeracji miejskich na cele energetyczne i nawozowe.
    The possibilities of green wastes from urban areas management for energetic and fertilizer purposes
    Autorzy:
    Witaszek, K.
    Pilarski, K.
    Janczak, D.
    Czekała, W.
    Lewicki, A.
    Rodríguez Carmona, P.C.
    Dach, J.
    Mazur, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/950886.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Śląska
    Tematy:
    odpady zielone
    biogaz
    pellety
    kompostowanie
    green waste
    biogas
    pellets
    composting
    Opis:
    In most European Union countries the biowastes (including green wastes) are collected separately and then recycled. In Poland yet in 2008 less than 5% of biowastes were collected selectively (major part was stored in the landfills) and scarcely in 2012 the situation has been significantly improved as a result of the new regulations implementation (the introduction of bio-waste containers). The aim of the study is to compare the different technologies of management of green biowastes from the urban agglomeration areas for the values of the obtained from them products (pellets, biogas and compost). The highest calorific value obtained the pellets from the cane over 18 MJ/kg. Pellets reached the largest economic profit.
    Możliwości zagospodarowania odpadów zielonych z terenów aglomeracji miejskich na cele energetyczne i nawozowe. W większości państw Unii Europejskiej bioodpady (w tym odpady zielone) są zbierane selektywnie i zagospodarowywane. W Polsce jeszcze w 2008 r. mniej niż 5% bioodpadów było zbieranych selektywnie (większość była składowana na składowiskach), a dopiero w 2012 roku sytuacja znacząco się poprawiła wskutek wdrożenia nowych przepisów (wprowadzenie pojemników na bioodpady). Celem pracy jest porównanie różnych technologii zagospodarowania bioodpadów zielonych z terenów aglomeracji miejskich pod kątem wartości uzyskanych z nich produktów (pelety, biogaz oraz kompost). Najwyższą wartość opałową uzyskały pelety z trzciny i topinamburu powyżej 18 MJ/kg, tym samym osiągając największy zysk ekonomiczny.
    Źródło:
    Archiwum Gospodarki Odpadami i Ochrony Środowiska; 2013, 15, 4; 21-28
    1733-4381
    Pojawia się w:
    Archiwum Gospodarki Odpadami i Ochrony Środowiska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Linking Traits and Personal Constructs: An Exploratory Study throughout Levels of Personality
    Autorzy:
    Martínez, Jesús García
    Cano-García, Francisco J.
    Rodríguez-Franco, Luis
    Buero-Gallego, Milagros
    Alcocer-Gómez, Elísabet
    Guerrero-Gómez, Rafael
    Powiązania:
    https://bibliotekanauki.pl/articles/2128612.pdf
    Data publikacji:
    2019-03-28
    Wydawca:
    Katolicki Uniwersytet Lubelski Jana Pawła II. Towarzystwo Naukowe KUL
    Tematy:
    Personality
    Levels of Personality
    Traits
    Personal Constructs
    Big Five Model
    Repertory Grid Technique
    McAdams’ Model
    Implicative Dilemmas
    Opis:
    This article presents a preliminary study of links between personal constructs and traits. The conceptual framework for this study is the domains of personality model postulated by McAdams (1995) and McAdams & Pals (2006), and we tried to find concomitances between variables of two different levels, the dispositional level and the identity level. A repertory grid and the NEOFFI inventory were distributed to a total of 273 individuals, 146 representing the general population, and 137 having pathologies. By applying an exploratory design ex post facto in which Pearson’s correlations and ANOVAs were used, we found associations between the content of the constructs used and the traits. The neuroticism trait was most closely related to the content of the constructs. There were also clear associations between construct structure and scores on traits. Neurotic subjects were more rigid, whereas agreeable and conscientious subjects were more complex. However, the type of sample (normal or pathological) is a basic modulator of the relationships between constructs and traits.
    Łączenie cech i konstruktów osobistych. Eksploracyjne studium poziomów osobowości This article presents a preliminary study of links between personal constructs and traits. The conceptual framework for this study is the domains of personality model postulated by McAdams (1995) and McAdams & Pals (2006), and we tried to find concomitances between variables of two different levels, the dispositional level and the identity level. A repertory grid and the NEOFFI inventory were distributed to a total of 273 individuals, 146 representing the general population, and 137 having pathologies. By applying an exploratory design ex post facto in which Pearson’s correlations and ANOVAs were used, we found associations between the content of the constructs used and the traits. The neuroticism trait was most closely related to the content of the constructs. There were also clear associations between construct structure and scores on traits. Neurotic subjects were more rigid, whereas agreeable and conscientious subjects were more complex. However, the type of sample (normal or pathological) is a basic modulator of the relationships between constructs and traits.
    Źródło:
    Roczniki Psychologiczne; 2009, 12, 1; 57-80
    1507-7888
    Pojawia się w:
    Roczniki Psychologiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Physical characteristics and yield of maize grain in rainfed conditions of high valleys of Mexico
    Właściwości fizyczne i plony ziarna kukurydzy w warunkach deszczowego zasilania w wodę w wysokich dolinach Meksyku
    Autorzy:
    Benitez-Rodriguez, M.G.
    Zepeda-Bautista, R.
    Hernandez-Aguilar, C.
    Virgen-Vergas, J.
    Rojas-Martinez, I.
    Dominguez-Pacheco, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/35536.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Opis:
    In the High Valleys of Mexico maize is produced with varied yield and quality which sometimes do not meet the parameters established by maize flour milling and nixtamalization industry for making tortilla. Therefore, an evaluation of the yields and quality of the grain of maize hybrids (Zea mays L.) and their relationship with the environment was performed. During the spring-summer cycle 2012, the hybrids HP-1, H-52, H-68, HP-2, H-70, Buho, HP-3, H-57E, H-64, Prospecto-1, H-72 and H-66 were evaluated in Texoloc and Benito Juárez (2240 and 2530 masl), Tlaxcala, Mexico in a design of completely randomised blocks with three replications. Grain yield (GY), thousand grain weight (TGW), hectolitric weight (HW), width (WG), length (LG) and thickness (TG) of grains were measured. The results showed highly significant differences (p = 0.01) between locations, hybrids and the interaction locality x hybrids for physical parameters. Among the localities, Texoloc had 86.59% and 24.32% higher GY and TGW compared to Benito Juarez, respectively, while the HW was slightly lower (73.68 kg hL-1). Average yields of the hybrids were 7.7 t ha-1; HP-2, HP-3, H-57E and H-66 hybrids had yields of more than 8 t ha-1 and the lowest yield was noted for H-70. The hybrids had an average HW of 74.30 kg hL-1; HP-1, H-68, H-70, Buho, HP-3 and H-72 had values > 74 kg hL-1, complying with the provisions of the quality standard NMX-FF034/1-SCFI- 2002 for maize destined for the nixtamalization process. The variation in agroclimatic conditions between the localities affected the yield and physical quality of maize grain.
    W Wysokich Dolinach Meksyku produkowana jest kukurydza o zróżnicowanej jakości i poziomie plonowania, która nie zawsze spełnia wymagania przemysłu młynarskiego i nixtamalizacji mąki kukurydzianej do produkcji tortilli. Z tego powodu przeprowadzono badania, mające na celu ocenę plonowania i jakości ziarna hybryd kukurydzy (Zea mays L.) oraz ich zależności od warunków środowiskowych. W sezonie wiosenno-letnim roku 2012 przeprowadzono badania na hybrydach HP-1, H-52, H-68, HP-2, H-70, Buho, HP-3, H-57E, H-64, Prospecto-1, H-72 oraz H-66 w Texoloc i Benito Juárez (2240 i 2530 m n.p.m.), Tlaxcala w Meksyku. Badania przeprowadzono w systemie bloków losowych, w trzech powtórzeniach, dokonując pomiarów plonu ziarna, masy tysiąca ziaren, masy hektolitra ziarna oraz szerokości, długości i grubości ziarna. Stwierdzono istotne różnice (p = 0,01) pomiędzy lokalizacjami, hybrydami oraz interakcjami lokalizacja- hybryda w zakresie parametrów fizycznych ziarna. Wartości plonu i masy 1000 ziaren w Texoloc były wyższe odpowiednio o 86,59% i 24,32% w porównaniu do wartości otrzymanych w Benito Juarez, podczas gdy wartość masa hektolitra była nieznaczenie niższa (73,68 kg·hL-1). Średni plon ziarna hybryd wyniósł 7,7 t·ha-1; plony hybryd HP-2, HP-3, H-57E i H-66 były powyżej 8 t·ha-1, a najniższy plon uzyskano dla hybrydy H-70. Średnia wartość masy hektolitra dla hybryd kukurydzy wyniosła 74,30 kg·hL-1; dla hybryd HP-1, H-68, H-70, Buho, HP-3 i H-72 były > 74 kg·hL-1, spełniając wymagania jakościowe normy NMX-FF034/1-SCFI-2002 dla kukurydzy przeznaczonej do procesu nixtamalizacji. Zróżnicowanie warunków agroklimatycznych pomiędzy badanymi lokalizacjami miało wpływ na plonowanie i charakterystyki fizyczne ziarna kukurydzy.
    Źródło:
    Acta Agrophysica; 2014, 21, 4
    1234-4125
    Pojawia się w:
    Acta Agrophysica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The influence of information on the prevention of occupational risks and ergonomic requirements in the development of non-traumatic osteomuscular diseases of the shoulder – a pilot study
    Autorzy:
    Rodríguez-Blanes, Gloria M.
    Lobato-Cañón, José Rafael
    Sánchez-Payá, José
    Ausó-Pérez, José Ramón
    Cardona-Llorens, Antonio Francisco J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2161943.pdf
    Data publikacji:
    2019-11-15
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    prevention
    occupational health
    primary healthcare
    shoulder
    musculoskeletal disorders
    cumulative trauma disorders
    Opis:
    Objectives Shoulder pain associated with upper limb musculoskeletal disorders is an important health problem in clinical practice due to its high prevalence, frequent consultations in primary healthcare and occupational health. Preventive strategies, including information disseminated among workers, can be useful. The aim of this study is to analyze the associations between non-traumatic osteomuscular diseases of the shoulder and the workers’ knowledge of the risks at the workplace and preventive measures developed there, as well as the association with ergonomic requirements. Material and Methods An observational case-control study was carried out on an occupationally active population assisted during 1 year in 1 healthcare center, involving 690 participants. Data were collected through a questionnaire including sociodemographic variables, the workplace, the knowledge of prevention and ergonomic requirements. The independent effect of the variables associated with non-traumatic shoulder pathology was explored through logistic regression. Results In total, 66.7% of the participants stated that they had been informed of the occupational hazards related to their jobs. The following variables were associated with a lower probability of shoulder injuries: male gender, working hours > 9 h/day or > 40 h/week, as well as having information on the risks associated with the workplace, using personal protective equipment, the existence of an occupational risks prevention service and/or risk assessment, the knowledge of the prevention plan, periodic medical examinations, and using one arm or physical force at work. A multivariate analysis revealed that the risk increased with age and lower educational levels, forced postures, repeated gestures, monotony and temporary absences from work. Furthermore, being informed of workplace risks, and using a single arm as well as physical force were shown as independent protective factors. Conclusions Information on both the ergonomic requirements and how to prevent occupational risks is a useful tool for the prevention of non-traumatic shoulder diseases. Preventive policies including health education interventions in the workplace could benefit other developed preventive activities. Int J Occup Med Environ Health. 2019;32(6):825–40
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2019, 32, 6; 825-839
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Single spiking neuron multi-objective optimization for pattern classification
    Autorzy:
    Juarez-Santini, Carlos
    Ornelas-Rodriguez, Manuel
    Soria-Alcaraz, Jorge Alberto
    Rojas-Domínguez, Alfonso
    Puga-Soberanes, Hector J.
    Espinal, Andrés
    Rostro-Gonzalez, Horacio
    Powiązania:
    https://bibliotekanauki.pl/articles/385022.pdf
    Data publikacji:
    2020
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    multi-objective optimization
    spiking neuron
    pattern classification
    Opis:
    As neuron models become more plausible, fewer computing units may be required to solve some problems; such as static pattern classification. Herein, this problem is solved by using a single spiking neuron with rate coding scheme. The spiking neuron is trained by a variant of Multi-objective Particle Swarm Optimization algorithm known as OMOPSO. There were carried out two kind of experiments: the first one deals with neuron trained by maximizing the inter distance of mean firing rates among classes and minimizing standard deviation of the intra firing rate of each class; the second one deals with dimension reduction of input vector besides of neuron training. The results of two kind of experiments are statistically analyzed and compared again a Mono-objective optimization version which uses a fitness function as a weighted sum of objectives.
    Źródło:
    Journal of Automation Mobile Robotics and Intelligent Systems; 2020, 14, 1; 73-80
    1897-8649
    2080-2145
    Pojawia się w:
    Journal of Automation Mobile Robotics and Intelligent Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Radon measurements in groundwater mines in La Palma and El Hierro, Canary Islands (Spain)
    Autorzy:
    Santamarta, Juan C.
    Gutiérrez, Luis Enrique Hernández
    Martín, Jesica Rodríguez
    Pérez, Lina
    Bascones, Rafael J. Lario
    Moro, Ángel Morales González
    Pérez, Noelia Cruz
    Powiązania:
    https://bibliotekanauki.pl/articles/1853859.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    promieniowanie
    wody podziemne
    kopalnia
    Wyspy Kanaryjskie
    radon gas
    radiation
    groundwater
    mines
    Canary Islands
    Opis:
    In the Canary Islands, groundwater is the main source of drinking water. Groundwater mines have been the system used by the engineers of the archipelago to collect water from the ground. The Canary Islands are volcanic with soils characterized by being rich in uranium, the disintegration of which gives rise to radon gas. In this study, radon gas levels in the mines on two islands of the archipelago have been measured to study exposure to this gas in the galleries. Results show values much higher than the European regulatory limit concentrations.
    Źródło:
    Archives of Mining Sciences; 2020, 65, 4; 869-876
    0860-7001
    Pojawia się w:
    Archives of Mining Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study on health risk factors as a basis to implement programs that promote a nutritional culture in students of the la Sabana University
    Autorzy:
    Rodriguez, S.
    Martinez, M.
    Segnini, F.
    Cajiao, V.
    Aivasovsky, I.
    Celis, L.G.
    Ayala, J.
    Rozo, C.
    Russi, A.
    Girata, V.
    Almonacid, C.C.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087202.pdf
    Data publikacji:
    2021
    Wydawca:
    Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
    Tematy:
    health promotion
    disease prevention
    obesity
    non-communicable diseases
    healthy lifestyle
    Opis:
    Background. Nowadays the importance of lifestyles in the prevention of type 2 diabetes and the metabolic syndrome has been largely accertained. Objective. The purpose of our work is to implement programs that promote a nutritional culture in adolescents and young adults of the La Sabana University. Methods. The methodology entailed, after the corresponding informed consent, taking measures of the triceps and supraescapular skinfolds, waist circumference, body mass index (BMI), lean mass, and fat mass. Fasting blood samples were also taken to quantify cholesterol, triglycerides, high density lipoprotein (HDL) and low density lipoprotein (LDL). Results. The results obtained show that of the 165 students, 10.3% were underweight, 13.93% were overweight and 0.6% were obese. With regards to gender, 4.8% of the men and 9% of the women were overweight, 3% of the men and 7.2% of the women were underweight, and 0.6% of the women were obese. The blood chemistry showed that 30% had hypercholesterolemia, 18% hypertriglyceridemia, 17% reported low HDL levels and 67% reported high LDL levels. Of all the cases studied, 40% are at risk of a metabolic syndrome. 60% claimed not to practice any physical activity - especially women who reported 44.70%. Conclusions. These findings have allowed us at the institution to implement a culture of healthy habits. The have also allowed us to identify students with risk factors for type 2 diabetes and metabolic syndrome. This is why the cardio- metabolic monitoring and control based on healthy eating and physical activity are important.
    Źródło:
    Roczniki Państwowego Zakładu Higieny; 2021, 72, 1; 89-94
    0035-7715
    Pojawia się w:
    Roczniki Państwowego Zakładu Higieny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Migration Coverage in Europe, Russia and the United States
    Autorzy:
    Kreutler, Marcus
    Fengler, Susanne
    Asadi, Nastaran
    Bodrunova, Svetlana
    Budivska, Halyna
    Diop, Layire
    Ertz, Georgia
    Gigola, Daria
    Katus, Eszter
    Kovacs, Denisa
    Kuś, Michał
    Láb, Filip
    Litvinenko, Anna
    Mack, Johanna
    Maier, Scott
    Pinto Martinho, Ana
    Matei, Antonia
    Miller, Kaitlin C.
    Oppermann, Lisa
    Pérez Vara, Eva
    Polyák, Gábor
    Ravisankar, Rajeev
    Rodríguez Pérez, Carlos
    Semova, Dimitrina J.
    Skleparis, Dimitris
    Splendore, Sergio
    Štefaniková, Sandra
    Szynol, Adam
    Telo, Décio
    Zguri, Rrapo
    Powiązania:
    https://bibliotekanauki.pl/articles/2152496.pdf
    Data publikacji:
    2022-09-22
    Wydawca:
    Polskie Towarzystwo Komunikacji Społecznej
    Tematy:
    comparative analysis
    journalism
    migration
    refugee
    media coverage
    Opis:
    Six years after the so-called ‘refugee crisis’ in 2015, the European Union remains divided on questions of migration and asylum policy. The issue also remains high on the agendas of the USA and Russia, two other key destination countries with immigration from Latin America and the Post-Soviet space. This article presents results from a comparative study of news coverage in 17 countries, focusing on 10 EU member states in Western and Central Eastern Europe (CEE), the USA and Russia. The intensity of coverage was remarkably different, with Hungary’s and Germany’s media standing out while Russian media displayed relatively low levels of coverage. Individual migrants and refugees were most visible in the two outlets from the USA. Media in CEE countries tended towards a more critical approach than media in Western Europe. However, differences between most countries’ pairs of analyzed media outlets indicate a more pluralistic debate than frequently assumed.
    Źródło:
    Central European Journal of Communication; 2022, 15, 2(31); 202-226
    1899-5101
    Pojawia się w:
    Central European Journal of Communication
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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