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    Wyświetlanie 1-87 z 87
    Tytuł:
    When is the category of flat modules abelian?
    Autorzy:
    García, J.
    Martínez Hernández, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1208371.pdf
    Data publikacji:
    1995
    Wydawca:
    Polska Akademia Nauk. Instytut Matematyczny PAN
    Opis:
    Let Fl(R) denote the category of flat right modules over an associative ring R. We find necessary and sufficient conditions for Fl(R) to be a Grothendieck category, in terms of properties of the ring R.
    Źródło:
    Fundamenta Mathematicae; 1995, 147, 1; 83-91
    0016-2736
    Pojawia się w:
    Fundamenta Mathematicae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Elastic constants influence on the L4-L5-S1 annuli fibrosus behavior, a probabilistic finite element analysis
    Autorzy:
    Jaramillo, H. E.
    Garcia, J. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/307431.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    FEM
    hiperelastyczność
    krążek międzykręgowy
    analiza probabilistyczna
    finite element analysis
    hyperelastic
    range of motion
    intervertebral discs
    probabilistic analysis
    sensitivity factor
    Opis:
    A probabilistic finite element (FE) analysis of the L4-L5 and L5-S1 human annulus fibrosus (AF) was conducted to obtain a better understanding of the biomechanics of the AF and to quantify its influence on the range of motion (ROM) of the L4-L5 and L5-S1 segments. Methods: The FE models were composed of the AF and the upper and lower endplates. The AF was represented as a continuous material composed of a hyperelastic isotropic Yeoh matrix reinforced with two families of fibers described with an exponential energy function. The caudal endplate was fully restricted and 8 Nm pure moment was applied to the cranial endplate in flexion, extension, lateral flexion and axial rotation. The mechanical constants were determined randomly based on a normal distribution and average values reported. Results: Results of the 576 models show that the ROM was more sensitive to the initial stiffness of the fibers rather than to the stiffening coefficient represented in the exponential function. The ROM was more sensitive to the input variables in extension, flexion, axial rotation and lateral bending. The analysis showed an increased probability for the L5-S1 ROM to be higher in flexion, extension and axial rotation, and smaller in lateral flexion, with respect to the L4-L5 ROM. Conclusions: An equation was proposed to obtain the ROM as a function of the elastic constants of the fibers and it may be used to facilitate the calibration process of the human spine segments and to understand the influence of each elastic constant on the ROM.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2017, 19, 4; 3-12
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A finite element model of the L4-L5-S1 human spine segment including the heterogeneity and anisotropy of the discs
    Autorzy:
    Jaramillo, H.
    Gomez, L.
    Garcia, J. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/951814.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    kręgosłup
    metoda elementów skończonych
    segment L4-L5-S1
    krążek międzykręgowy
    model hipersprężysty
    intervertebral disc
    L4-L5-S1 segment
    finite element model
    human spine
    hyperelastic model
    Opis:
    With the aim to study disc degeneration and the risk of injury during occupational activities, a new finite element (FE) model of the L4-L5-S1 segment of the human spine was developed based on the anthropometry of a typical Colombian worker. Beginning with medical images, the programs CATIA and SOLIDWORKS were used to generate and assemble the vertebrae and create the soft structures of the segment. The software ABAQUS was used to run the analyses, which included a detailed model calibration using the experimental step-wise reduction data for the L4-L5 component, while the L5-S1 segment was calibrated in the intact condition. The range of motion curves, the intradiscal pressure and the lateral bulging under pure moments were considered for the calibration. As opposed to other FE models that include the L5-S1 disc, the model developed in this study considered the regional variations and anisotropy of the annulus as well as a realistic description of the nucleus geometry, which allowed an improved representation of experimental data during the validation process. Hence, the model can be used to analyze the stress and strain distributions in the L4-L5 and L5-S1 discs of workers performing activities such as lifting and carrying tasks.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2015, 17, 2; 15-24
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On roughness measurement by angular speckle correlation
    Autorzy:
    Salazar, F.
    Belenguer, T.
    García, J.
    Ramos, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/220643.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    roughness
    speckle
    non-destructive testing
    Opis:
    In this work, the influence of both characteristics of the lens and misalignment of the incident beams on roughness measurement is presented. To investigate how the focal length and diameter affect the degree of correlation between the speckle patterns, a set of experiments with different lenses is performed. On the other hand, the roughness when the beams separated by an amount are non-coincident at the same point on the sample is measured. To conclude the study, the uncertainty of the method is calculated.
    Źródło:
    Metrology and Measurement Systems; 2012, 19, 2; 373-380
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Balancing Offshoring and Agility in the Apparel Industry: Lessons From Benetton and Inditex
    Offshoring w przemyśle odzieżowym na przykładzie firm Benetton i Inditex
    Autorzy:
    Sartal, A.
    Martínez-Senra, A. I.
    García, J. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/233843.pdf
    Data publikacji:
    2017
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    offshoring
    agility
    apparel industry
    organizational innovation
    time to market
    przemysł odzieżowy
    innowacje organizacyjne
    cykl produkcyjny
    Opis:
    Based on a case study from the apparel industry, the paper addresses how the organizational innovations adopted by Benetton and Inditex allowed them to balance lower production costs in developing countries with an adequate response time to frequent preference changes and increasing demands for customisation. Findings confirm the fragility of multinationals whose offshoring strategy has not considered the costs of coordinating suppliers in far-off locations and suggest organisational improvements that make production costs, variety and time to market goals compatible. Our research thus provides a view of the conditions and processes that can overcome in increasingly volatile environments the misalignment between demand changes and the limited reactivity of industrial infrastructures. Furthermore the innovation strategy of textile companies has created generalizable lessons for other sectors in which demand uncertainty is high, life cycles short, and customers are, to some extent, prepared to pay for “speed to market”.
    Na podstawie studium przypadku z branży odzieżowej w artykule przedstawiono, w jaki sposób innowacje organizacyjne przyjęte przez firmy Benetton i Inditex pozwoliły na obniżenie kosztów produkcji w krajach rozwijających się z zachowaniem odpowiedniego czasu reakcji na częste zmiany preferencji i rosnące wymagania klientów. Wyniki potwierdzają niestabilność firm międzynarodowych, których strategia offshoringowa nie uwzględniała kosztów koordynacji dostawców. Przeprowadzone badania pozwalają wskazać rozwiązania problemów, z którymi borykają się firmy działające w specyficznych warunkach częstej zmiany popytu i ograniczonej reaktywności infrastruktury przemysłowej. Ponadto strategia innowacyjna firm tekstylnych może być przykładem dla innych sektorów, w których panuje równie wysoka niepewność popytu i krótki cykl życia produktu.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2017, 2 (122); 16-23
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical Analysis and Simulations of Quasistatic Frictionless Contact Problems
    Autorzy:
    Fernandez Garcia, J. R.
    Han, W.
    Shillor, M.
    Sofonea, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/908327.pdf
    Data publikacji:
    2001
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    analiza numeryczna
    quasistatyka
    metoda elementów skończonych
    quasistatic contact
    Signorini condition
    normal compliance
    viscoplasticity
    variational inequalitie
    error estimate
    finite element method (FEM)
    numerical approximation
    Opis:
    A summary of recent results concerning the modelling as well as the variational and numerical analysis of frictionless contact problems for viscoplastic materials are presented. The contact is modelled with the Signorini or normal compliance conditions. Error estimates for the fully discrete numerical scheme are described, and numerical simulations based on these schemes are reported.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2001, 11, 1; 205-222
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Environmental radiological impact by a fertilizer complex in the Ebro river (Spain)
    Wpływ przemysłu produkcji nawozów sztucznych na skażenia promieniotwórcze środowiska naturalnego na przykładzie rzeki Ebro (Hiszpania)
    Autorzy:
    Costa, E.
    Sanchez-Cabeza, J.
    Garcia, J.
    Masque, P.
    Grimaltb, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/340306.pdf
    Data publikacji:
    2004
    Wydawca:
    Główny Instytut Górnictwa
    Tematy:
    skażenie wody
    rzeka Ebro w Hiszpanii
    skażenie radonem
    skażenie torem
    water contamination
    Ebro river in Spain
    radon contamination
    thorium contamination
    Źródło:
    Prace Naukowe GIG. Górnictwo i Środowisko / Główny Instytut Górnictwa; 2004, 1; 33-33
    1643-7608
    Pojawia się w:
    Prace Naukowe GIG. Górnictwo i Środowisko / Główny Instytut Górnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Calderón-Zygmund operators and unconditional bases of weighted Hardy spaces
    Autorzy:
    García-Cuerva, J.
    Kazarian, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1290466.pdf
    Data publikacji:
    1994
    Wydawca:
    Polska Akademia Nauk. Instytut Matematyczny PAN
    Tematy:
    wavelets
    splines
    $H^p$ spaces
    $A_p$ weights
    Schauder and unconditional bases
    Opis:
    We study sufficient conditions on the weight w, in terms of membership in the $A_p$ classes, for the spline wavelet systems to be unconditional bases of the weighted space $H^p(w)$. The main tool to obtain these results is a very simple theory of regular Calderón-Zygmund operators.
    Źródło:
    Studia Mathematica; 1994, 109, 3; 255-276
    0039-3223
    Pojawia się w:
    Studia Mathematica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A genetic algorithm for the maximum 2-packing set problem
    Autorzy:
    Trejo-Sánchez, Joel Antonio
    Fajardo-Delgado, Daniel
    Gutierrez-Garcia, J. Octavio
    Powiązania:
    https://bibliotekanauki.pl/articles/330154.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    maximum 2-packing set
    genetic algorithms
    graph algorithms
    algorytm genetyczny
    algorytm grafowy
    Opis:
    Given an undirected connected graph G = (V, E), a subset of vertices S is a maximum 2-packing set if the number of edges in the shortest path between any pair of vertices in S is at least 3 and S has the maximum cardinality. In this paper, we present a genetic algorithm for the maximum 2-packing set problem on arbitrary graphs, which is an NP-hard problem. To the best of our knowledge, this work is a pioneering effort to tackle this problem for arbitrary graphs. For comparison, we extended and outperformed a well-known genetic algorithm originally designed for the maximum independent set problem. We also compared our genetic algorithm with a polynomial-time one for the maximum 2-packing set problem on cactus graphs. Empirical results show that our genetic algorithm is capable of finding 2-packing sets with a cardinality relatively close (or equal) to that of the maximum 2-packing sets. Moreover, the cardinality of the 2-packing sets found by our genetic algorithm increases linearly with the number of vertices and with a larger population and a larger number of generations. Furthermore, we provide a theoretical proof demonstrating that our genetic algorithm increases the fitness for each candidate solution when certain conditions are met.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2020, 30, 1; 173-184
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Intestinal Helminths of the red fox [Vulpes vulpes L.] in Galicia [Northwest Spain]
    Jelitowe helminty lisa [Vulpes vulpes L.] w Galicji [polnocno-zachodnia Hiszpania]
    Autorzy:
    Alvarez, M F
    Iglesias, R.
    Garcia, J.
    Paniagua, E.
    Sanmartin, M.L.
    Powiązania:
    https://bibliotekanauki.pl/articles/836410.pdf
    Data publikacji:
    1995
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Tematy:
    pasozyty zwierzat
    Hiszpania
    Vulpes vulpes
    parazytologia
    lis pospolity
    zywiciele
    tasiemce
    nicienie jelitowe
    Opis:
    The intestinal helminth fauna of 201 specimens of Vulpes vulpes, captured in Galicia (northwest Spain), was investigated. Eight species were found: Toxocara canis (23% of host specimens), Toxocara cali (0.5%), Toxascaris leonina (1%), Uncinaria stenocephala (28%), Seuratascaris numidica (0.5%), Taenia crassiceps (23%), Mesocestoides litteralus (2.5%) and Dipylidium caninum (0.5%). We discuss possible relationships between human population density and the prevalence of infection of fox by intestinal helminths.
    Źródło:
    Annals of Parasitology; 1995, 41, 4; 429-442
    0043-5163
    Pojawia się w:
    Annals of Parasitology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Intestinal Helminths of the red fox [Vulpes vulpes L.] in Galicia [Northwest Spain]
    Jelitowe helminty lisa [Vulpes vulpes L.] w Galicji [północno-zachodnia Hiszpania]
    Autorzy:
    Alvarez, M. F.
    Iglesias, R.
    Garcia, J.
    Paniagua, E.
    Sanmartin, M. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/2149105.pdf
    Data publikacji:
    1995
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Tematy:
    pasozyty zwierzat
    Hiszpania
    Vulpes vulpes
    parazytologia
    lis pospolity
    zywiciele
    tasiemce
    nicienie jelitowe
    Opis:
    The intestinal helminth fauna of 201 specimens of Vulpes vulpes, captured in Galicia (northwest Spain), was investigated. Eight species were found: Toxocara canis (23% of host specimens), Toxocara cali (0.5%), Toxascaris leonina (1%), Uncinaria stenocephala (28%), Seuratascaris numidica (0.5%), Taenia crassiceps (23%), Mesocestoides litteralus (2.5%) and Dipylidium caninum (0.5%). We discuss possible relationships between human population density and the prevalence of infection of fox by intestinal helminths.
    Źródło:
    Wiadomości Parazytologiczne; 1995, 41, 4; 429-442
    0043-5163
    Pojawia się w:
    Wiadomości Parazytologiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of the friction coefficients of chestnut (Castanea sativa Mill.) sawn timber
    Autorzy:
    Villar-Garcia, J.R.
    Vidal-Lopez, P.
    Corbacho, A.J.
    Moya, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2082657.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    wood
    mechanical properties
    friction coefficient
    direct shear test
    Opis:
    This work provides the values of both the static and the kinetic friction coefficients for chestnut (Castanea sativa Mill.) of Spanish origin. Knowledge concerning these coefficients has its main application in the study of agroindustrial structures and machinery with timber members in contact. This determination was developed taking into account the timber anisotropy to establish surfaces and directions of slipping. A modified direct shear test device was used to conduct the tests and reproduce the tribological system. This procedure was functional and reliable and considered suitable for standardizing the friction measurement between timber surfaces, since this device is widely distributed in geotechnical and materials laboratories and the European codes do not specify a procedure or device to carry it out. The average values obtained were 0.46 for the static coefficient and 0.33 for the kinetic one, without considering the surfaces and directions of slipping. These values ranged between 0.36 and 0.55 for the static friction coefficient and between 0.28 and 0.39 for the kinetic friction coefficient depending on the direction considered and also taking into account the anisotropy of the timber. A good correlation was obtained between both coefficients, thus allowing for the estimation of the kinetic coefficient from the static one.
    Źródło:
    International Agrophysics; 2020, 34, 1; 65-77
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Patient classification algorithm at urgency care area of a hospital based on the triage system
    Autorzy:
    Mondragon, N.
    Istrate, D.
    Wegrzyn-Wolska, K.
    Garcia, J. C.
    Sanchez, J.C.
    Powiązania:
    https://bibliotekanauki.pl/articles/951692.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
    Tematy:
    triage
    classification
    SET
    fuzzy logic
    decision trees
    patients
    urgency
    hospital emergency
    algorithm
    ocena stanu zdrowia rannych
    klasyfikacja
    logika rozmyta
    drzewa decyzyjne
    pacjenci
    pomoc szpitalna
    algorytm
    Opis:
    The time passed in the urgency zone of a hospital is really important, and the quick evaluation and selection of the patients who arrive to this area is essential to avoid waste of time and help the patients in a higher emergency level. The triage, an evaluation and classification structured system, allows to manage the urgency level of the patient; it is based on the vital signs measures and clinical data of the patient. The goal is making the classification in the shortest possible time and with a minimal error percentage. Levels are allocated according to the concept that what is urgent is not always serious and that what is serious is not always urgent. In this work, we present a computational algorithm that evaluates the patients within the fever symptomatic category, we use fuzzy logic and decision trees to collect and analyze simultaneously the vital signs and the clinical data of the patient through a graphical interface; so that the classification can be more intuitive and faster. Fuzzy logic allows us to process data and take a decision based on incomplete information or uncertain values, decision trees are structures or rules sets that classify the data when we have several variables.
    Źródło:
    Journal of Medical Informatics & Technologies; 2013, 22; 87-94
    1642-6037
    Pojawia się w:
    Journal of Medical Informatics & Technologies
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of dual-fuel (diesel + natural gas) particle matter and CO2 emissions of a heavy-duty diesel engine during transient operation
    Autorzy:
    Barroso, P.
    Ribas, X.
    Pita, M.
    Dominguez, J.
    De Seia, E.,
    García, J.-M.
    Powiązania:
    https://bibliotekanauki.pl/articles/134220.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    dual fuel
    natural gas
    diesel engine
    heavy-duty
    transient
    particle matter
    CO2
    silnik dwupaliwowy
    gaz ziemny
    silnik spalinowy
    cząstki stałe
    dwutlenek węgla
    Opis:
    The aim of this study is to describe the impact on particle matter and CO2 emissions of converting an existing heavy-duty diesel engine for on-highway truck applications to a dual-fuel engine (diesel + natural gas), especially in transient operation. A dual-fuel engine with homogeneous gas charge injection in the intake line before turbocharger was considered. The results showed the feasibility of this kind of technology for transient operation reaching a significant reduction of particle matter plus a decrement in CO2 emissions at the expense of a small decrement of brake fuel conversion efficiency and an increment of unburned hydrocarbons in the exhaust gases.
    Źródło:
    Combustion Engines; 2013, 52, 2; 3-11
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Off-Diagonal Magnetoimpedance Dependence of Magnetostriction and Anisotropy in Co-Based and Fe-Based Amorphous Ribbons
    Autorzy:
    Sánchez, T.
    García, J.
    Santos, J.
    Escoda, Ll.
    Prida, V.
    Sánchez, M.
    Suñol, J.
    Hernando, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1507012.pdf
    Data publikacji:
    2010-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.30.Gw
    75.50.Kj
    75.60.Ch
    Opis:
    The object of this work is the comparison of domain structure and off-diagonal magnetoimpedance effect in amorphous ribbons with different magnetostriction coefficient. The $Co_{66}Fe_4Ni_1Si_{15}B_{14}$ and $Fe_{80}B_{20}$ samples were obtained by melt-spinning. During the quenching procedure a 0.07 T transverse magnetic field was applied to some of the samples. Domain patterns obtained by the Bitter technique confirm that the differences on the samples are related to the different anisotropy and magnetostriction coefficient, and the quenching procedure. Small changes on the anisotropy distribution and the magnetostriction coefficient can be detected by the off-diagonal impedance spectra as a consequence of the different permeability values of the samples.
    Źródło:
    Acta Physica Polonica A; 2010, 118, 5; 756-758
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Short-term effects of spent coffee grounds on the physical properties of two Mediterranean agricultural soils
    Autorzy:
    Cervera-Mata, A.
    Martin-Garcia, J.M.
    Delgado, R.
    Parraga, J.
    Sanchez-Maranon, M.
    Delgado, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/2082515.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    organic amendment
    soil aggregate stability
    soil water retention
    soil aggregate size
    SEM images
    Opis:
    We investigated the short-term effects of spent coffee grounds on the physical properties of two Mediterranean agricultural soils (Calcisol and Luvisol). The in vitro assay was performed with two spent coffee grounds doses (60 and 240 Mg ha-1), two incubation times (30 and 60 days) and two modalities: with and without lettuce seedlings (Lactuca sativa var. longifolia). Spent coffee grounds addition increased water retention at -33 and -1500 kPa, and decreased bulk density and plant-available water content. With spent coffee grounds, the percentage of macroaggregates increased, the percentage of meso- and microaggregates decreased and the structural stability of all types of aggregates increased. The stereomicroscopy images showed that: the structural aggregates were rounded, the porosity increased by 316%, the structure was ordered into smaller aggregates, the incorporation of spent coffee grounds particles could occur in intraped cracks and spent coffee grounds particles could act as a binding agent. Scanning electron microscopy also showed that spent coffee grounds particles interacted with mineral particles and integrated into soil structure; moreover, fungal hyphae also developed on many spent coffee grounds particles. If spent coffee grounds effects are compared with those described in the literature for other organic amendments, the same trend was observed in most of the soil physical properties although with a different intensity, principally with regard to structural stability.
    Źródło:
    International Agrophysics; 2019, 33, 2; 205-216
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wavelet-based Entropy Measure for Rate-Distortion Optimization in Image Coding
    Autorzy:
    Garcia-Alvarez, J.
    Führ, H.
    Castellanos-Dominguez, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/226142.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    entropy
    wavelet transform
    information measure
    rate distortion
    Opis:
    A novel method for calculation of the entropy measure in wavelet space is proposed. This perceived-based entropy measure uses a Second Order Model entropy estimator, in which the occurrence of neighbors is considered in formulation. It has the intention to allow the implementation of a more suitable measure in coding processes and a relationship between the metric and the description of perceptual features. This method is used for the Rate-Distortion optimization in order to improve the bit-allocation coding algorithm, demonstrating that the wavelet-based entropy estimates a truncation step close to the target rate. The hypothesis is founded in the effect of distortion on the coefficient allocation. Because entropy measure is a close approximation of the conditional probability of image in multiresolution space, it provides an adequate representation for the information of a Detail feature. A definition of Detail-based homogeneity variance criteria is used for the information quantity - wavelet representation space, in order to find the image that fits a given Quality Level criteria. Experimental results are obtained for artificial and natural databases.
    Źródło:
    International Journal of Electronics and Telecommunications; 2010, 56, 1; 25-31
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Large gypsum nodules in the Paleogene and Neogene evaporites of Spain: distribution and palaeogeographic significance
    Autorzy:
    Ortí, F.
    Rosell, L.
    Playá, E.
    García-Veigas, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059032.pdf
    Data publikacji:
    2010
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Opis:
    Gypsiferous units occur along the margins of some Paleogene and Neogene basins in Spain. These units accumulated in shallow saline lakes of low ionic concentration. Other gypsiferous facies constitute outer rings of the thick, highly-saline evaporite formations that occupy the central parts of the basins. In some of these gypsum units and rings, large nodules (from 0.5 m to several metres across) of secondary gypsum that originated as replacive or displacive nodular anhydrite are present. Although these occurrences usually show a stratiform arrangement, vertical geometries are observed locally, suggesting ascending circulation of anhydritizing flows. The common characteristics of the large gypsum nodules in the various occurrences indicate that the precursor anhydrite formed in burial conditions from shallow to moderate depths. A few occurrences of large, secondary gypsum nodules in the gypsum units are linked to deep faults or diapiric structures.
    Źródło:
    Geological Quarterly; 2010, 54, 4; 411-422
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Measures of noncompactness and normal structure in Banach spaces
    Autorzy:
    García-Falset, J.
    Jiménez-Melado, A.
    Lloréns-Fuster, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1290315.pdf
    Data publikacji:
    1994
    Wydawca:
    Polska Akademia Nauk. Instytut Matematyczny PAN
    Tematy:
    normal structure
    nonexpansive mappings
    measures of noncompactness
    Opis:
    Sufficient conditions for normal structure of a Banach space are given. One of them implies reflexivity for Banach spaces with an unconditional basis, and also for Banach lattices.
    Źródło:
    Studia Mathematica; 1994, 110, 1; 1-8
    0039-3223
    Pojawia się w:
    Studia Mathematica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Carrier Diffusion in the Barrier Enabling Formation of Charged Excitons in InAs/GaAs Quantum Dots
    Autorzy:
    Karlsson, K. F.
    Moskalenko, E. S.
    Holtz, P. O.
    Monemar, B.
    Schoenfeld, W. V.
    Garcia, J. M.
    Petroff, P. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2028833.pdf
    Data publikacji:
    2001-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.67.Hc
    71.35.-y
    78.55.Cr
    Opis:
    It is demonstrated that the photoluminescence spectra of single self-assembled quantum dots are very sensitive to the experimental conditions, such as excitation energy and crystal temperature. A qualitative explanation is given in terms of the effective diffusion of the photogenerated carriers, determined by the experimental conditions, which influence the capture probability and hence also the charge state of the quantum dots. This is proposed as a new tool to populate quantum dots with extra electrons in order to study phenomena involving charged excitons.
    Źródło:
    Acta Physica Polonica A; 2001, 100, 3; 387-395
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The OAE1a in Cuchía (Early Aptian, Spain): C and O geochemistry and global correlation
    Autorzy:
    García-Mondéjar, J.
    Fernández-Mendiola, P. A.
    Owen, H. G.
    Powiązania:
    https://bibliotekanauki.pl/articles/139445.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Cretaceous
    Aptian
    Basque-Cantabrian Basin
    C-O isotopes
    TOC
    kreda
    apt
    izotopy
    Opis:
    C-isotopes, TOC and O geochemical data from the lower Aptian Cuchía section in the western Basque-Cantabrian basin (BCB) allow an accurate delimitation of the OAE1a-equivalent and its geochemical Menegatti´s segments, a detailed δ13Ccarb correlation with regional and interregional sections, and a high-resolution construction of TOC and bulk-rock δ18Ocarb curves and their interpretation. The δ13Ccarb values range from -2‰ and +4‰ (VPDB). They agree with previous data from the eastern BCB sections (Aralar) confirming the ammonite age of the OAE1a in the Basque-Cantabrian basin: Deshayesites forbesi, Deshayesites deshayesi, and Deshayesites deshayesi-Dufrenoyia furcata transition Zones. Interregional δ13Ccarb correlation with pelagic (Cismon, Italy, and Mid-Pacific Mountains, DSDP Site 463) and neritic (Roquefort-La Bédoule, France) core sections, reveals a common profile of a wide negative excursion characteristic of the OAE1a. It consists of a double trough separated by a flat relative maximum, with two negative spikes in the upper trough of neritic sections. TOC absolute values range from 0.12% to 1.37%. Segments of the TOC curve with persistent low values closely correspond with descending segments of the δ13Ccarb curve, and are attributed to lesser organic productivity in the BCB. Detailed bulk-rock δ18Ocarb data (-5.71‰ to -1.05 ‰ PDB) and variation curve show two main positive O-isotope shifts and three minor positive inflections, within a general negative trend characteristic of the OAE1a. The two major positive shifts correspond to both shallowing upwards sequences and the lowermost can be related to a eustatic sea level fall. Independent interregional correlation of the O-isotope shifts with C-isotopes supports their interpretation as punctuating colder events within a general warming trend.
    Źródło:
    Acta Geologica Polonica; 2015, 65, 4; 525-543
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Youngest agamid lizards from Western Europe (Sierra de Quibas, Spain, late Early Pleistocene)
    Autorzy:
    Blain, H.-A.
    Bailon, S.
    Agusti, J.
    Pinero-Garcia, P.
    Lozano-Fernandez, I.
    Sevilla, P.
    Lopez-Garcia, J.M.
    Sanchez, G.R.
    Mancheno, M.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/21138.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Opis:
    Here we report a new Early Pleistocene record of agamid lizards (Agamidae indet.) from the Spanish locality of Quibas (ca. 1.3–1.0 Ma), which represents the latest evidence of the family in Western Europe. Up to now, the family Agamidae was considered to have disappeared in this region at 1.8 Ma. This new record implies the survival of agamid lizards for a large part of the Early Pleistocene in the southernmost Iberian Peninsula, probably because of favourable climatic and environmental conditions. Consequently, the formerly detected Pliocene / Pleistocene boundary is no longer recognisable in the evolution of the herpetological assemblages in Western Europe.
    Źródło:
    Acta Palaeontologica Polonica; 2014, 59, 4
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Occurrence of a new sulphate mineral: Ca7Na3K(SO4)9 in the Emet borate deposits, western Anatolia (Turkey)
    Autorzy:
    García-Veigas, J.
    Ortí, F.
    Rosell, L.
    Gündog(an, I.
    Helvac, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059025.pdf
    Data publikacji:
    2010
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Miocene
    K-sulphate
    emetite
    glauberite
    probertite
    evaporites
    Opis:
    Emetite, a new sulphate mineral, Ca734
    Źródło:
    Geological Quarterly; 2010, 54, 4; 431-438
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Visualization of Atmosphere Information for Distance Education System Based on Fuzzy Inference Using Customized Knowledge
    Autorzy:
    Ohnishi, K.
    Garcia-Sanchez, J. A.
    Tang, Y.
    Dong, F.
    Hirota, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/385123.pdf
    Data publikacji:
    2015
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    distance education
    visualization
    fuzzy inference
    atmosphere
    POMS
    Opis:
    A distance education system is designed based on fuzzy inference, where visualized atmosphere information is shared by all learners in a virtual classroom. It provides high aspirations, low isolated feeling, low stress, and high affinity to learners, and offers learner’s psychological information, individual difference information, and hints of system improvement to the system manager. The effect of visualized atmosphere information in the learner’s psychological states is confirmed by T score of POMS test for 15 graduate students using CAI contents, and comparison experiment with traditional distance education. The proposal of atmosphere information presentation of virtual classroom provides a first step in establishing Education Academy beyond Space Time (EAST).
    Źródło:
    Journal of Automation Mobile Robotics and Intelligent Systems; 2015, 9, 3; 18-24
    1897-8649
    2080-2145
    Pojawia się w:
    Journal of Automation Mobile Robotics and Intelligent Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Using visual and force information in robot-robot cooperation to build metallic structures
    Autorzy:
    Pomares, J.
    Gil, P.
    Corrales, J. A.
    Garcia, G. J.
    Puente, S. T.
    Torres, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/384655.pdf
    Data publikacji:
    2009
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Opis:
    In this paper, a cooperative robot-robot approach to construct metallic structures is presented. In order to develop this task, a visual-force control system is proposed. The visual information is composed of an eye-in-hand camera, and a time of flight 3D camera. Both robots are equipped by a force sensor at the end-effector. In order to allow a human cooperate with both robots, an inertial motion capture system and an indoor localization system are em ployed. This multisensorial approach allows the robots to cooperatively construct the metallic structure in a flexible way and sharing the workspace with a human operator.
    Źródło:
    Journal of Automation Mobile Robotics and Intelligent Systems; 2009, 3, 3; 96-101
    1897-8649
    2080-2145
    Pojawia się w:
    Journal of Automation Mobile Robotics and Intelligent Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Turtle tracks from the Late Jurassic of Asturias, Spain
    Autorzy:
    Avanzini, M
    Garcia-Ramos, J.C.
    Lires, J.
    Menegon, M.
    Pinuela, L.
    Fernandez, L.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/20797.pdf
    Data publikacji:
    2005
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Opis:
    Although tracks of dinosaurs are well known from Upper Jurassic sediments, tracks of non−dinosaurian vertebrates are fairly rare. The Upper Jurassic Lastres Formations of Asturias in northern Spain contain many vertebrate tracksites that include footprints and trackways of non−dinosaurian tetrapods. Several of these tracks are natural casts of pentadactyl to tridactyl footprints with digits connected by arched structures. The digits are short with deep scratch marks oriented anteriorly. The Asturian tracks show a high degree of morphological similarity to other specimens previously described as possible turtle tracks. Observations from extant turtle trackways show some surprising similarities with the fossil material. The tracks are here interpreted as having been made by turtles partially buoyed by water or by turtles walking in a slightly wet subaerial environment.
    Źródło:
    Acta Palaeontologica Polonica; 2005, 50, 4; 743-755
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Microstructure and Properties of TiC/Ti Coatings Deposited by the Supersonic Cold Gas Spray Technique
    Autorzy:
    Kusiński, J.
    Kac, S.
    Kowalski, K.
    Dosta, S.
    Georgiou, E. P.
    Garcia-Forgas, J.
    Matteazzi, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/356608.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    cold gas spraying
    Ti
    TiC
    CerMet coating
    SEM
    TEM
    wear resistance
    Opis:
    Nanostructured, biocompatible, TiC/Ti Supersonic Cold Gas Sprayed coatings were deposited onto a Ti6Al4V alloy and their microstructure, wear resistance and hardness were investigated. The starting nanostructured powder, containing a varied mixture of Ti and TiC particles, was produced by high energy ball milling. Scanning and transmission electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray diffraction were used for structural and chemical analyses of powder particles and coatings. Coatings, 250-350 μm thick, preserving the nanostructure and chemical powder composition, with low porosity and relatively high hardness (~850 HV), were obtained. These nanostructured TiC/Ti coatings exhibited better tribological properties than commonly used biomedical benchmark materials, due to an appropriate balance of hard and soft nano-phases.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 2; 867-873
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Air-spore in Cartagena, Spain: Viable and non-viable sampling methods
    Autorzy:
    Elvira-Rendueles, B.
    Moreno, J.
    Garcia-Sanchez, A.
    Vergara, N.
    Martinez-Garcia, M.J.
    Moreno-Grau, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/51349.pdf
    Data publikacji:
    2013
    Wydawca:
    Instytut Medycyny Wsi
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2013, 20, 4
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Point-Contact Spectroscopy of Ce$\text{}_{1-x}$RE$\text{}_{x}$Ni$\text{}_{5}$ (RE = Pr, Nd)
    Autorzy:
    Kačmárová, T.
    Reiffers, M.
    Garcia Soldevilla, J.
    Goméz Sal, J. C.
    Espeso, J. I.
    Blanco, J. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2013409.pdf
    Data publikacji:
    2000-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    73.40.Jn
    71.70.Ch
    71.70.Gm
    Opis:
    We report on the study of the electron-quasiparticle interaction function in Ce$\text{}_{1-x}$RE$\text{}_{x}$ Ni$\text{}_{5}$ (RE = Pr, Nd) pseudobinary compounds for x = 0, 0.2, 0.5, 0.8, and 1 measured by means of point-contact spectroscopy. The measured point-contact spectra (d$\text{}^{2}$V/dI$\text{}^{2}$ - directly proportional to the electron- quasiparticle interaction function) of the heterocontacts between Ce$\text{}_{1-x}$ RE$\text{}_{x}$Ni$\text{}_{5}$ and Cu in the ballistic regime are presented.zapisz i p
    Źródło:
    Acta Physica Polonica A; 2000, 97, 5; 795-798
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    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:
    The Anisotropy of the Electrical Resistivity and Thermal Expansion of Single Crystal DyNi$\text{}_{5}$
    Autorzy:
    Kačmarčiková, E.
    Reiffers, M.
    Mihálik, M.
    Kováč, J.
    Menovsky, A.
    Garcia Soldevilla, J.
    Señas Pariente, A.
    Goméz Sal, J. C.
    Powiązania:
    https://bibliotekanauki.pl/articles/2013656.pdf
    Data publikacji:
    2000-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    72.15.Eb
    65.70.+y
    71.70.Gm
    Opis:
    The results of the measurements of temperature dependence of the electrical resistivity ρ(T), thermal expansion L(T) and susceptibility χ(T) on single crystal DyNi$\text{}_{5}$ in the temperature range 4.2-300 K are reported. The maximum in ρ(T) at T$\text{}_{N}$=12.2 K was observed which corresponds to the transition to antiferromagnetically ordered state. Taking into account the Bloch-Grüneisen formula for electron-phonon contribution ρ$\text{}_{ph}$(T) to ρ(T) the anisotropic magnetic contribution ρ$\text{}_{mag}$(T) was determined. We also observed the anisotropic behaviour of L(T) at low temperatures.
    Źródło:
    Acta Physica Polonica A; 2000, 97, 5; 811-814
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Towards the production of microalgae biofuels: the effect of the culture medium on lipid deposition
    Autorzy:
    Cuellar Garcia, D.J.
    Rangel-Basto, Y.A.
    Barajas-Solano, A.F.
    Munoz-Penalosa, Y.A.
    Urbina-Suarez, N.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/80961.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    biomass production
    biofuel
    microalga
    alga
    Chlorella vulgaris
    Scenedesmus obliquus
    renewable source
    culture medium
    lipid accumulation
    Źródło:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2019, 100, 3
    0860-7796
    Pojawia się w:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Anderson Localization in Quantum Chaos: Scaling and Universality
    Autorzy:
    García-García, A. M.
    Wang, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2047824.pdf
    Data publikacji:
    2007-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    72.15.Rn
    71.30.+h
    05.45.Df
    05.40.-a
    Opis:
    The one-parameter scaling theory is a powerful tool to investigate Anderson localization effects in disordered systems. In this paper we show that this theory can be adapted to the context of quantum chaos provided that the classical phase space is homogeneous, not mixed. The localization problem in this case is defined in momentum, not in real space. We then employ the one-parameter scaling theory to: (a) propose a precise characterization of the type of classical dynamics related to the Wigner-Dyson and Poisson statistics which also predicts in which situations Anderson localization corrections invalidate the relation between classical chaos and random matrix theory encoded in the Bohigas-Giannoni-Schmit conjecture, (b) to identify the universality class associated with the metal-insulator transition in quantum chaos. In low dimensions it is characterized by classical superdiffusion, in higher dimensions it has in general a quantum origin as in the case of disordered systems. We illustrate these two cases by studying 1d kicked rotors with non-analytical potentials and a 3d kicked rotor with a smooth potential.
    Źródło:
    Acta Physica Polonica A; 2007, 112, 4; 635-653
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Criteria for environmental pollution of the industrial and mining areas assessment in Spain
    Autorzy:
    Grima, J.
    Garcia, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1182784.pdf
    Data publikacji:
    2008
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    gleba
    standardy jakości
    obszary przemysłowe
    obszary górnicze
    odpady
    soil
    groundwater
    quality standards
    industrial areas
    mining areas
    wastes
    Opis:
    Parlament Europejski upoważnił Komisję Europejską do przygotowania strategii ochrony gleb, która uwzględniałaby kroki prewencyjne oraz odpowiednie ograniczenia i redukcję wpływu działalności ludzkiej na gleby. W Hiszpanii Rozporządzenie Królewskie 9/2005 z 14 stycznia spełnia założenia Prawa o Odpadach 10/1998 z 21 kwietnia i ustala listę potencjalnych zanieczyszczeń, a także kryteria i standardy pozwalające uznać dany teren, po konsultacji z lokalnym samorządem, za zanieczyszczony. Rozporządzenie Królewskie nie dotyczy terenów publicznych zajętych przez instalacje militarne. Ministerstwo Obrony przygotuje program dekontaminacji tych terenów, po konsultacji z Ministerstwem Środowiska. Brak jest kryteriów prawnych dla oceny zanieczyszczenia środowiska spowodowanego przez odpady przemysłu wydobywczego. W tym przypadku dalsze rozwiązania prawne będą musiały opierać się na przyszłej Dyrektywie Parlamentu Europejskiego i Rady Europejskiej w sprawie odpadów przemysłu wydobywczego. Dyrektywa ta przedstawi środki, procedury oraz przepisy dotyczące działań prewencyjnych lub maksymalnie ograniczających możliwe negatywne wpływy na środowisko oraz możliwe ryzyko dla ludzkiego zdrowia powodowane przez odpady przemysłu wydobywczego i przez ich składowanie i wykorzystywanie. Jeśli chodzi o wody podziemne, to ustalone są tylko standardy dotyczące wód pitnych. Tym niemniej, liczne inicjatywy narodowe i europejskie podniosły sprawę oceny chemicznego stanu wód podziemnych. Oparła się ona na istniejących jakościowych standardach Wspólnoty (azotany, pestycydy oraz biocydy) oraz na wymaganiach poszczególnych państw członkowskich dotyczących określania substancji zanieczyszczających oraz wartości granicznych, powyżej których wody podziemne uznawane są za zagrożone, zgodnie zresztą z zaleceniami Ramowej Dyrektywy Wodnej. Zgodnie z propozycją Dyrektywy Wód Podziemnych wartości graniczne określane w obrębie krajowych dorzeczy lub ciał wód podziemnych wykorzystywane są dla określania dobrego poziomu chemicznego wód podziemnych.
    Źródło:
    Polish Geological Institute Special Papers; 2008, 24; 55-62
    1507-9791
    Pojawia się w:
    Polish Geological Institute Special Papers
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessing a moderating effect and the global fit of a PLS model on online trading
    Ocena łagodzącego efektu i testów zgodności modelu PLS w obrocie produktami finansowymi z wykorzystaniem internetu
    Autorzy:
    García-Machado, Juan J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1342201.pdf
    Data publikacji:
    2017
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
    Tematy:
    e-Business
    e-commerce
    Goodness of Fit Measures Moderating Effect
    Online trading
    PLS-SEM
    e-biznes
    e-handel
    efekt łagodzący
    marketing
    obrót handlowy przez Internet
    test zgodności
    Opis:
    This paper proposes a PLS Model for the study of Online Trading. Traditional investing has experienced a revolution due to the rise of e-trading services that enable investors to use Internet conduct secure trading. On the hand, model results show that there is a positive, direct and statistically significant relationship between personal outcome expectations, perceived relative advantage, shared vision and economy-based trust with the quality of knowledge. On the other hand, trading frequency and portfolio performance has also this relationship. After including the investor’s income and financial wealth (IFW) as moderating effect, the PLS model was enhanced, and we found that the interaction term is negative and statistically significant, so, higher IFW levels entail a weaker relationship between trading frequency and portfolio performance and vice-versa. Finally, with regard to the goodness of overall model fit measures, they showed that the model is fit for SRMR and dG measures, so it is likely that the model is true.
    W niniejszym artykule posługujemy się modelem PLS w celu przeprowadzenia badania nad obrotem produktami finansowymi przy wykorzystaniu Internetu. Tradycyjny sposób inwestowania przeszedł swoistą rewolucję ze względu na rosnącą skalę bezpiecznych usług transakcyjnych świadczonych drogą internetową. Z jednej strony uzyskane wyniki wskazują na istnienie dodatniego, bezpośredniego i istotnego statystycznie związku między osobistymi oczekiwaniami co do wyniku, postrzeganą przewagą względną, wspólną wizją, zaufaniem do gospodarki oraz posiadanej wiedzy wysokiej jakości. Z drugiej strony zależność taką wykazują też częstotliwość transakcji oraz wydajność portfelowa. Model PLS rozszerzono uwzględniając dochody i finansowy majątek inwestora jako efekt łagodzący i okazało się, że stopień interakcji jest ujemny i statystycznie istotny, czyli przy podwyższonych poziomach dochodów i majątku inwestora zauważa się słabszą zależność pomiędzy częstotliwością transakcji i wydajnością portfelową oraz vice versa. Także w odniesieniu do testów zgodności metod wykazano, że model ten nadaje się do SRMR oraz dG, co oznacza, że prawdopodobnie model ten jest prawdziwy.
    Źródło:
    Marketing Instytucji Naukowych i Badawczych; 2017, 4(26); 1-34
    2353-8414
    Pojawia się w:
    Marketing Instytucji Naukowych i Badawczych
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sequential extraction of uranium isotopes in sediments from an estuary historically affected by anthropogenic inputs of natural radionuclides
    Sekwencyjna ekstrakcja izotopów uranu z osadów estuariowych, skażonych naturalnymi izotopami promieniotwórczymi pochodzenia antropogenicznego
    Autorzy:
    Aguadol, J.
    Bolivar, J.
    Garcia-Tenorio, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/340210.pdf
    Data publikacji:
    2004
    Wydawca:
    Główny Instytut Górnictwa
    Tematy:
    izotopy uranu
    spektrometria alfa
    specjacja
    osady
    TENORM
    U-isotopes
    α-particle spectrometry
    alpha-particle spectrometry
    speciation
    sediments
    Źródło:
    Prace Naukowe GIG. Górnictwo i Środowisko / Główny Instytut Górnictwa; 2004, 1; 64-64
    1643-7608
    Pojawia się w:
    Prace Naukowe GIG. Górnictwo i Środowisko / Główny Instytut Górnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dynamism patterns of western Mediterranean cruise ports and the coopetition relationships between major cruise ports
    Autorzy:
    Esteve-Perez, J.
    Garcia-Sanchez, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/258786.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    cruise ports
    Mediterranean ports
    hierarchic patterns
    coopetition
    shift-share analysis
    Opis:
    The Mediterranean Sea has seen an increase of ports hosting cruise ships during the first fifteen years of the 21st century. The increase in cruise ship presence in Mediterranean ports is associated with the dynamism of cruise traffic in recent years, with an average annual growth of 7.45% for cruise passengers worldwide during the period of 1990-2015. Cruise traffic is a maritime business that is primarily composed of two elements, maritime affairs and tourism. This article focuses on the maritime component. With the growth of the cruise industry, cruise lines have been forced to seek new ports to meet demand in an attempt to create differentiated products based on the ports that compose the itinerary. The itinerary system of cruise traffic makes the cruise ports depend on one another to design an itinerary. This feature results in both complex geographic relationships in the design of a cruise itinerary and complex competitive/cooperative relationships between ports. The aim of this article is to present the hierarchic picture of a sample of 29 cruise ports in the Western Mediterranean region during the period of 2000-2015. To achieve this goal, a port size classification is proposed and a shift-share analysis at the inter- and intra-group size level is applied. Moreover, concentration measures are used to determine the changes in the levels of market concentration. Furthermore, a dynamic model is proposed to determine the competitive or cooperative relationships between cruise ports. The proposed model is applied to the largest ports with data from the 2001-2015 period.
    Źródło:
    Polish Maritime Research; 2018, 1; 51-60
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Joule Heating Preannealing Effect in the Coercivity Field and Magnetostriction Constant of Co$\text{}_{66}$Fe$\text{}_{4}$Mo$\text{}_{2}$Si$\text{}_{16}$B$\text{}_{12}$ Alloy
    Autorzy:
    Garcia Tello, P.
    González, J.
    Blanco, J.
    Żuberek, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/2013239.pdf
    Data publikacji:
    2000-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Kj
    75.30.Gw
    75.80.+q
    Opis:
    The effect of thermal treatments (by the Joule heating and conventional annealing) on the coercivity and saturation magnetostriction constant in the amorphous and nanocrystalline Co$\text{}_{66}$Fe$\text{}_{4}$Mo$\text{}_{2}$Si$\text{}_{16}$B$\text{}_{12}$ alloy is reported. It is noticeable the near insensibility to the external stress of coercive field and anisotropy field (leading to extremely low value of magnetostriction 1.5×10$\text{}^{-8}$) achieved after the Joule heating by two steps (first one to relax the internal stresses and the second one to develop a fine nanocrystalline structure).
    Źródło:
    Acta Physica Polonica A; 2000, 97, 3; 595-598
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On the extraction of threshold voltage, effective channel length and series resistance of MOSFETs
    Autorzy:
    Ortiz-Conde, A.
    Garcia Sánchez, F.J.
    Liou, J.J.
    Powiązania:
    https://bibliotekanauki.pl/articles/309320.pdf
    Data publikacji:
    2000
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    threshold voltage
    channel length
    series resistance
    parameter extraction
    Opis:
    The first part of this article presents the modeling of the long-channel bulk MOSFET as a particular case of the SOI MOSFET. The second part reviews compares and scrutinizes various methods to extract the threshold voltage, the effective channel and the individual values of drain and source resistances. These are important device parameters for modeling and circuit simulation.
    Źródło:
    Journal of Telecommunications and Information Technology; 2000, 3-4; 43-58
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Phenological changes in olive (Ola europaea L.) reproductive cycle in southern Spain due to climate change
    Autorzy:
    Garcia-Mozo, H.
    Oteros, J.
    Galan, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/51237.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Medycyny Wsi
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2015, 22, 3
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Crural bases position as a structural criterion for supraspecific diagnosis of Early Jurassic zeilleriid brachiopods
    Autorzy:
    Baeza-Carratala, J.F.
    Garcia Joral, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/945875.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    paleontology
    Brachiopoda
    Zeilleriidae
    systematics
    structural criterion
    supraspecific diagnosis
    Jurassic
    Early Jurassic
    zeilleriid brachiopod
    brachiopod
    Opis:
    Analysis of the internal structure carried out on several representative genera of the brachiopod family Zeilleriidae from the Lower Jurassic of the Betic Ranges (SE Spain), complemented with specimens from nearby domains such as the Iberian Range and Lusitanian Basin, has enabled to propose a model for discrimination of genera based on the relative position of the crural bases with respect to the hinge plates. This particular feature has been analysed in the genera Zeilleria, Bakonyithyris, Securina, Neozeilleria, Cincta, Aulacothyris, and Plesiothyris, revealing three different basic patterns of crural bases arrangement: a Zeilleria-type, with crural bases distinctly arising from the ventral side of the hinge plates; a Securina-type, with crural bases originating transversally to the hinge plates and dorsally prominent; and a Bakonyithyris-type, intermediate between both previous patterns.
    Źródło:
    Acta Palaeontologica Polonica; 2014, 59, 3; 651-661
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ocena skuteczności procesu ozonowania katalitycznego z udziałem dwutlenku manganu na przykładzie wodnego roztworu 2-chloro-4-nitrofenolu (CNP)
    Efficacy assessment of manganese dioxide assisted catalytic ozonation in the example of 2-chloro-4-nitrophenyl (CNP)
    Autorzy:
    Andrzejewski, P.
    Herrero, J.
    Garcia-Consuegra, U. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/237446.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Zrzeszenie Inżynierów i Techników Sanitarnych
    Tematy:
    ozon
    katalityczne utlenianie
    CNP
    dwutlenek manganu
    ozone
    catalytic ozonation
    manganese dioxide
    Opis:
    W literaturze brakuje jednoznacznej oceny skuteczności procesu ozonowania katalitycznego na tlenkach metali, w tym dwutlenku manganu. Część prac zaprzecza kata-litycznej roli tlenków metali, natomiast inne ją potwierdzają. Z tego względu przeprowadzono porównawcze badania skuteczności ozonowania katalitycznego z udziałem dwutlenku manganu i ozonowania klasycznego. Związkiem poddawanym degradacji był 2-chloro-4-nitrofenolu (CNP). Zarówno obecność atomu chloru, jak i grupy nitrowej w pierścieniu aromatycznym tego związku skutkuje jego wysoką odpornością na degradację. Zbuforowany roztwór modelowy zawierający CNP w ilości 25 g/m3 poddawano ozonowaniu w reaktorze przez 20 min (próbki pobierano do 60. minuty reakcji), przy różnych wartościach pH, zarówno przy braku, jak i w obecności dwutlenku manganu w postaci suspensji. Wykazano, że CNP ulegał degradacji (maks. 40%) zarówno w procesie klasycznego, jak i katalitycznego ozonowania, przy czym skuteczność tego ostatniego była wyraźnie większa przy pH=7 niż przy pH=8. Ponadto stwierdzono, że degradacja CNP praktycznie ustawała po zakończeniu dawkowania ozonu, gdyż nie odnotowano dalszego ubytku CNP w czasie.
    Available literature provides inconclusive assessment of efficacy of metal oxide assisted (manganese dioxide including) ozonation process. Some study results negate catalytic role of metal oxides, while other research confirms it. Therefore, comparative studies assessing efficacy of manganese dioxide assisted catalytic ozonation and of a standard procedure were performed. 2-chloro-4-nitrophenyl (CNP) was chosen for the experiments. Both chlorine atom and nitro group in aromatic ring of the compound determine its high resistance to degradation. Buffered, CNP-containing (25 g/m3) model solution was ozonated in the reactor for 20 min (samples withdrawn up to 60 min) at varied pH and with or without manganese dioxide in suspension. It was demonstrated that CNP was degraded (up to 40%), both in standard and catalytic ozonation, while the efficacy of the latter was insignificantly higher at pH=7 than pH=8. Additionally, CNP degradation was demonstrated to cease when ozone dosing stopped. No further time-dependent CNP depletion was observed.
    Źródło:
    Ochrona Środowiska; 2013, 35, 4; 57-60
    1230-6169
    Pojawia się w:
    Ochrona Środowiska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Retention of two dialkyl alkylphosphonates and a phosphoramidate utilized as chemical weapons agents simulants in a polyurethane rubber matrix
    Zatrzymywanie w gumie poliuretanowej dwóch dialkiloalkilofosfonianów i fosforoamidu stosowanych jako symulanty bojowych środków trujących
    Autorzy:
    Gavilán Garcia, I.
    Gimenez, D.
    Quagliano, J. C.
    Powiązania:
    https://bibliotekanauki.pl/articles/271189.pdf
    Data publikacji:
    2013
    Wydawca:
    Centralny Ośrodek Badawczo-Rozwojowy Aparatury Badawczej i Dydaktycznej, COBRABiD
    Tematy:
    chemical weapons agent simulant
    polyurethane rubber
    retention
    symulanty bojowych środków chemicznych
    bojowe środki chemiczne
    guma poliuretanowa
    zatrzymywanie
    Opis:
    In this article we report the retention of two dialkyl alkylphosphonates and a phosphoramidate in a polybutadiene-based polyurethane rubber matrix. Two dialkyl akylphosphonates, which are degradation products of nerve chemical weapons agent (CWA) and a phosphoramidate, were tested in this study for penetration into the rubber matrix. They are often used as a symulant of CWA. One of the dialkyl alkylphosphonates and the phosphoramidate were synthesized and the rubber matrix was challenger with these chemicals for retention and penetration using three different thickness of barrier material. Under the experimental conditions tested, no penetration of chemical simulants on the rubber was observed. Our results suggested that this polyurethane matrix could be a potential barrier material for protection against CWA.
    Opisano zatrzymywanie dwóch dialkiloalkilofosfonianow i fosforoamidu w gumie polbutadienowopoliuretanowej. Dwa dialkiloalkilofosfoniany, które są produktami degradacji bojowych środków trujących (BST) z grupy trucizn nerwów i fosforoamidu badano pod kątem ich wnikania do gumy. Przeprowadzono syntezę jednego dialkiloalkilofosfonianu i fosforoamidu, które wraz z handlowym dialkiloalkilofosfonianem nanoszono na gumę w celu określenia ich zatrzymywania oraz przenikania stosując różne grubości gumy. W warunkach doświadczenia nie stwierdzono przenikania symulatorów przez gumę. Otrzymane wyniki pozwalają sądzić, że guma poliuretanowa może być stosowana do ochrony przed BST.
    Źródło:
    Aparatura Badawcza i Dydaktyczna; 2013, 18, 3; 223-228
    2392-1765
    Pojawia się w:
    Aparatura Badawcza i Dydaktyczna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Soft-part preservation in two species of the arthropod Isoxys from the middle Cambrian Burgess Shale of British Columbia, Canada
    Autorzy:
    Garcia-Bellido, D.C.
    Vannier, J.
    Collins, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/945908.pdf
    Data publikacji:
    2009
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    arthropoda
    isoxys
    “great appendage”
    burgess shale
    lagerstätten
    cambrian
    Opis:
    More than forty specimens from the middle Cambrian Burgess Shale reveal the detailed anatomy of Isoxys, a worldwide distributed bivalved arthropod represented here by two species, namely Isoxys acutangulus and Isoxys longissimus. I. acutangulus had a non−mineralized headshield with lateral pleural folds (= “valves” of previous authors) that covered the animal’s body almost entirely, large frontal spherical eyes and a pair of uniramous prehensile appendages bearing stout spiny outgrowths along their anterior margins. The 13 following appendages had a uniform biramous design—i.e., a short endopod and a paddle−like exopod fringed with marginal setae with a probable natatory function. The trunk ended with a flap−like telson that protruded beyond the posterior margin of the headshield. The gut of I. acutangulus was tube−like, running from mouth to telson, and was flanked with numerous 3D−preserved bulbous, paired features interpreted as digestive glands. The appendage design of I. acutangulus indicates that the animal was a swimmer and a visual predator living off−bottom. The general anatomy of Isoxys longissimus was similar to that of I. acutangulus although less information is available on the exact shape of its appendages and visual organs. I. longissimus is characterized by extremely long anterior and posterior spines. There are now seven Isoxys species known with soft−part preservation, I. acutangulus, I. longissimus from the Burgess Shale, I. auritus and I. curvirostratus from the Maotianshan Shale of China, I. communis and I. glaessneri from the Emu Bay Shale of Australia and I. volucris from Sirius Passet in Greenland. The frontal appendages of Isoxys strongly resemble those of other Cambrian arthropods, characterized by a single pair of “great appendages” with a shared prehensile function yet some variability in length and shape.
    Źródło:
    Acta Palaeontologica Polonica; 2009, 54, 1
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Soft-part preservation in two species of the arthropod Isoxys from the middle Cambrian Burgess Shale of British Columbia, Canada
    Autorzy:
    Garcia-Bellido, D.C.
    Vannier, J.
    Collins, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/20887.pdf
    Data publikacji:
    2009
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    arthropod
    Isoxys
    Middle Cambrian
    Cambrian
    Burgess Shale
    British Columbia
    Canada
    Arthropoda
    Isoxys acutangulus
    Isoxys longissimus
    paleontology
    fossil
    Opis:
    More than forty specimens from the middle Cambrian Burgess Shale reveal the detailed anatomy of Isoxys, a worldwide distributed bivalved arthropod represented here by two species, namely Isoxys acutangulus and Isoxys longissimus. I. acutangulus had a non−mineralized headshield with lateral pleural folds (= “valves” of previous authors) that covered the animal’s body almost entirely, large frontal spherical eyes and a pair of uniramous prehensile appendages bearing stout spiny outgrowths along their anterior margins. The 13 following appendages had a uniform biramous design—i.e., a short endopod and a paddle−like exopod fringed with marginal setae with a probable natatory function. The trunk ended with a flap−like telson that protruded beyond the posterior margin of the headshield. The gut of I. acutangulus was tube−like, running from mouth to telson, and was flanked with numerous 3D−preserved bulbous, paired features interpreted as digestive glands. The appendage design of I. acutangulus indicates that the animal was a swimmer and a visual predator living off−bottom. The general anatomy of Isoxys longissimus was similar to that of I. acutangulus although less information is available on the exact shape of its appendages and visual organs. I. longissimus is characterized by extremely long anterior and posterior spines. There are now seven Isoxys species known with soft−part preservation, I. acutangulus, I. longissimus from the Burgess Shale, I. auritus and I. curvirostratus from the Maotianshan Shale of China, I. communis and I. glaessneri from the Emu Bay Shale of Australia and I. volucrisfrom Sirius Passet in Greenland. The frontal appendages of Isoxys strongly resemble those of other Cambrian arthropods, characterized by a single pair of “great appendages” with a shared prehensile function yet some variability in length and shape.
    Źródło:
    Acta Palaeontologica Polonica; 2009, 54, 4
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On board LNG reliquefaction technology: a comparative study
    Autorzy:
    Gómez, J.
    Gómez, M.
    Garcia, R.
    Catoira, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/963412.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    reliquefaction
    boil-off gas
    vessel
    Brayton Cycle
    efficiency
    Opis:
    Reliquefaction technologies are being currently applied on board liquefied natural gas (LNG) carriers on the basis of economic criteria and energy efficiency. A variety of reliquefaction techniques have been developed so far during the last decade. Nevertheless, technology enhancement continues being a research area of interest. In this article the different technologies applied to the reliquefaction of the boil-off gas (BOG) on LNG carriers have been described, analysed and discussed, contributing to highlight the process and operation characteristics as well as selection plant criteria. Finally, a comparison of the different reliquefaction plants, considering their capacities and efficiencies as well as other technical data of interest has been carried out.
    Źródło:
    Polish Maritime Research; 2014, 1; 77-88
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Advantages of application of the backscattered electron scanning images in the determination of soil structure and soil constituents
    Autorzy:
    Wierzchos, J.
    Garcia-Gonzalez, M.T.
    Ascaso, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/25149.pdf
    Data publikacji:
    1995
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    soil structure
    backscattered electron scanning image
    soil constituent
    microanalytical technique
    soil component
    Źródło:
    International Agrophysics; 1995, 09, 1
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A new turtle species of Brodiechelys from the Early Cretaceous of Spain: Systematic and palaeobiogeographic implications
    Autorzy:
    Perez-Garcia, A.
    Gasaulla, J.M.
    Ortega, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/946018.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    testudines
    pan-cryptodira
    xinjiangchelyidae
    brodiechelys
    cretaceous
    europe
    spain
    Opis:
    Brodiechelys brodiei is an Early Cretaceous turtle from Great Britain, the only species of the genus. This taxon has been shown in recent phylogenies to be closely related to Xinjiangchelyidae and therefore could be the only representative of this group in Europe. Here, we present several specimens from the Early Cretaceous Maestrazgo Basin, in the Iberian Range of Spain attributed to the British genus, and to a new species, Brodiechelys royoi. This discovery shows that, as previously observed with terrestrial turtles, some freshwater turtle taxa had a wide European distribution during the Early Cretaceous, being present in both Britain and the Iberian Peninsula. This study sheds new light on the phylogenetic position of this enigmatic genus, supporting its attribution to Xinjiangchelyidae, a clade whose presence has been previously confirmed exclusively from the Middle Jurassic to Early Cretaceous of Asia. We propose that another recently identified taxon from the Iberian Peninsula (i.e., Larachelus morla) is also a member of this clade. Recent studies have identified several continental taxa of the clade that included the members of “Macrobaenidae” and “Sinemydidae” in Europe. This study provides new evidence of close relationships between the Early Cretaceous turtle faunas from Europe and Asia.
    Źródło:
    Acta Palaeontologica Polonica; 2014, 59, 2; 333-342
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Orchard’s pruning for energy purposes - methodology of environmental impact assessment of new logistic chain developed within EuroPruning project - Part 1
    Gałęzie z sadów na cele energetyczne - metodologia oceny oddziaływania na środowisko nowego łańcucha logistycznego opracowanego w ramach projektu EuroPruning - Cz. 1
    Autorzy:
    Dyjakon, A.
    Boer den, J.
    García-Galindo, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/93606.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Inżynierii Rolniczej
    Tematy:
    pruned biomass
    energetic utilisation
    environmental impact assessment
    biomasa
    gałęzie
    wykorzystanie energetyczne
    ocena oddziaływania na środowisko
    Opis:
    The energy potential from pruning residues of permanent crops is significant. However, there is not much data about the environmental influence of the processes related to harvesting, storage and transportation of pruning residues. In this paper, the methodology of analysis of the environmental impact assessment applied within the EuroPruning project is presented. The screening and scoping steps in accordance with Directive 97/11/EC as well as other procedures included in ISO 14001 methodology, which are related to the environmental impact, are described. As a result, the selected approach for the determination of the potential environmental effects, including risk description and prevention actions is presented.
    Potencjał energetyczny ściętych gałęzi z sadów i plantacji drzew owocowych jest znaczny. Jednak, niewiele jest danych na temat oddziaływania środowiskowego procesów związanych z pozyskiwaniem, magazynowaniem oraz transportem tego typu biomasowych odpadów sadowniczych dla celów energetycznych. W pracy przedstawiono metodologię analizy oceny oddziaływania środowiskowego wykorzystaną w projekcie EuroPruning. Opisano poszczególne etapy oraz zasady postępowania dla tego typu projektów w odniesieniu do dyrektywy 97/11/EC oraz procedur zawartych w ISO 14001, które powiązane są oddziaływaniem na środowisko. W efekcie, przedstawiono przyjętą strategię działania w projekcie dla określenia potencjalnego oddziaływania na środowisko wraz z oceną ryzyka oraz działaniami prewencyjnymi.
    Źródło:
    Agricultural Engineering; 2018, 22, 1; 29-36
    2083-1587
    Pojawia się w:
    Agricultural Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Secondary electron interactions in materials with environmental and radiological interest
    Autorzy:
    García, G.
    Blanco, F.
    de Pablos, J.
    Pérez, J.
    Williart, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/148529.pdf
    Data publikacji:
    2003
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    electron scattering
    energy deposition
    Opis:
    Important environmental and radiological applications require energy deposition models including the interactions between the secondary electrons and the atoms or molecules of the medium. In this work we propose a method to obtain reliable cross-section data to be used in these models by combining total and ionisation cross-section measurements with simple calculations of the differential and integral elastic cross sections. The energy loss spectra obtained in this experiment have been also used to derive the stopping power of the considered materials for electrons. Some examples of results for atomic (Xe) and molecular (CF4) targets are presented and discussed in this paper.
    Źródło:
    Nukleonika; 2003, 48, 2; 103-107
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Enterprise logistics, indicators and physical distribution manager
    Autorzy:
    Hernández, J. R.
    García, M. G.
    Hernández, G. G.
    Powiązania:
    https://bibliotekanauki.pl/articles/409334.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    enterprise logistics
    indicators
    logistics models
    physical distribution
    Opis:
    Four models were created to study enterprise logistics. From the first one of them, the Logistic Model Based on Positions (LoMoBaP), one of its forty-four charges, the Physical Distribution Manager will be taken, and indicators will be generated to measure its performance, following, the third one of the models, the Logistic Model Based on Indicators of Positions (LoMoBaIPo). The objective of this work is to show how indicators of management can be used in enterprise logistics, following the LoMoBaIPo to apply to the Physical Distribution Manager of the LoMoBaP. To obtain this objective it will be followed the Integrated-Adaptable Methodology for the development of Decision Support System [IAMDSS], which for their flexibility is very useful in other works of investigation, that not necessarily generate a Decision Support System (DSS). As result a set of tables are obtained, that allows to evaluate the Physical distribution Manager across indicators.
    Źródło:
    Research in Logistics & Production; 2013, 3, 1; 5-20
    2083-4942
    2083-4950
    Pojawia się w:
    Research in Logistics & Production
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Embellishment of the urban landscape of Piornal (Caceres). Spain
    Autorzy:
    García del Moral y Mora, M. J.
    Marrero, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/345625.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Krakowska im. Tadeusza Kościuszki. Wydział Architektury. Katedra Kształtowania Środowiska Mieszkaniowego
    Tematy:
    embellishment
    urban
    landscape
    Opis:
    The embellishment of the urban landscape of the Spanish towns is an open subject in many of its regions. In the current project we experiment with the improvement of Piornal, located in the Jerte Valley, Extremadura, Spain. The town is mainly agricultural, whose main farming (planting) is cherry. Its climate is harsh. Its winters are long, plenty of snow and rainy springs as well as autumns. This weather, put together with the low buying power of its inhabitants, made them change their traditional architecture of the house coming from adobe wall or masonry to one quicker and easier to keep, combining load bearing wall of ceramic bricks structures and facades covered with undulating sheets made of aluminium or fibrocement which protect them from the cold and the humidity. The solution has turned out to be practical but at the expense of the original beauty giving a more industrial and incidental building nature which is in contrast with its natural appearance. This work tries to recover the town identity, its citizens, its habits, its festivities and its landscape, its natural environment and its streets where they live their working or leisure life trough the improvement of the appearance of the facades of their houses, now white and covered with plates, changing them into pieces of art. All the project long, the University of Seville provides the artistic creativity and the technical resources and the town council, the board and keep of the artists through the execution period of the artistic project.
    Źródło:
    Środowisko Mieszkaniowe; 2013, 12; 70-74
    1731-2442
    2543-8700
    Pojawia się w:
    Środowisko Mieszkaniowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design, Manufacture and Characterization of an Acoustic Barrier Made of Multi-Phenomena Cylindrical Scatterers Arranged in a Fractal-Based Geometry
    Autorzy:
    Casteneira-Ibanez, S.
    Rubio, C.
    Romero-Garcia, V.
    Sanchez-Perez, J. V.
    Garcia-Raffi, L. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/176662.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    acoustic arrays
    acoustic attenuation
    acoustic wave absorption
    acoustic wave scattering
    phononic crystals
    acoustic barrier
    physical effect of sound
    Opis:
    In this work we present the design and the manufacturing processes, as well as the acoustics standard- ization tests, of an acoustic barrier formed by a set of multi-phenomena cylindrical scatterers. Periodic arrangements of acoustic scatterers embedded in a fluid medium with different physical properties are usually called Sonic Crystals. The multiple scattering of waves inside these structures leads to attenuation bands related to the periodicity of the structure by means of Bragg scattering. In order to design the acoustic barrier, two strategies have been used: First, the arrangement of scatterers is based on fractal geometries to maximize the Bragg scattering; second, multi-phenomena scatterers with several noise con- trol mechanisms, as resonances or absorption, are designed and used to construct the periodic array. The acoustic barrier reported in this work provides a high technological solution in the field of noise control.
    Źródło:
    Archives of Acoustics; 2012, 37, 4; 455-462
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimal design of membership functions of a fuzzy logic controller for an autonomous wheeled mobile robot using ant colony optimization
    Autorzy:
    Martínez, P.
    Castillo, O.
    Alanis, A.
    Garcia, M.
    Soria, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/384537.pdf
    Data publikacji:
    2010
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    fuzzy control
    ant colony optimization
    autonomous mobile robots
    Opis:
    In this paper we describe the application of a Simple ACO (S-ACO) as a method of optimization for membership functions' parameters of a fuzzy logic controller (FLC) in order to find the optimal intelligent controller for an Autonomous Wheeled Mobile Robot. Simulation results show that ACO outperforms a GA in the optimization of FLCs for an autonomous mobile robot.
    Źródło:
    Journal of Automation Mobile Robotics and Intelligent Systems; 2010, 4, 1; 43-48
    1897-8649
    2080-2145
    Pojawia się w:
    Journal of Automation Mobile Robotics and Intelligent Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Biofortification - promising approach to increasing the content of iron and zinc in staple food crops
    Biofortyfikacja - obiecujący sposób zwiększania zawartości żelaza i cynku w podstawowych roślinach uprawnych
    Autorzy:
    Garcia-Banuelos, M.L.
    Sida-Arreola, J.P.
    Sanchez, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/15687.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
    Tematy:
    biofortification
    iron content
    zinc content
    food crop
    metal
    homeostasis
    micronutrient
    malnutrition
    anaemia
    bioavailability
    Opis:
    Micronutrient deficiencies have increased over recent decades due to the general depreciation of the quality of poor people’s diet, both in developed and developing countries. The deficiencies of iron (Fe) and zinc (Zn) are a critical public health problem worldwide, with the negative impact on health, lifespan and productivity. Biofortification is an agricultural approach that can improve human nutrition on a global scale. Agronomic biofortification is considered a short-term and complementary strategy, but economic analyses suggest that genetic biofortification is the most effective strategy for increasing dietary Fe and Zn intakes of vulnerable populations. Enrichment of cereal grains by breeding is a high-priority area of research, and an effective strategy among other approaches, e.g, fortification, supplementation and food diversification. This review discusses the role of Fe and Zn in plant nutrition, the potential strategies for developing Fe and Zn biofortified crops and their importance in human nutrition.
    Obecnie niedobory Fe i Zn stanowią istotny problem dotyczący zdrowia publicznego, są bowiem przyczyną negatywnego wpływu na zdrowie, średnią długość życia i przyrost naturalny. Biofortyfikacja agronomiczna jest to metoda, która może poprawić żywienie człowieka na całym świecie. Analizy ekonomiczne wskazują, że genetyczna biofortyfikacja jest najbardziej skuteczną strategią zwiększenia spożycia Fe i Zn, natomiast agronomiczna biofortifikacja może być podejściem komplementarnym, i to w krótkim czasie. Strategia genetyczna jest obszarem priorytetowym w badaniach zboża, i okazuje się być bardziej skuteczna niż metody fortyfikacji, suplementacji lub zróżnicowania środków spożywczych. W pracy omówiono rolę Fe i Zn w odżywianiu roślin, potencjalne strategie rozwoju upraw z wykorzystaniem biofortyfikacji Fe i Zn oraz znaczenie tych upraw w żywieniu człowieka.
    Źródło:
    Journal of Elementology; 2014, 19, 3
    1644-2296
    Pojawia się w:
    Journal of Elementology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A new leanchoiliid megacheiran arthropod from the lower Cambrian Emu Bay Shale, South Australia
    Autorzy:
    Edgecombe, G.D.
    Garcia-Bellido, D.C.
    Paterson, J.R.
    Powiązania:
    https://bibliotekanauki.pl/articles/21269.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    new arthropod
    arthropod
    leanchoiliid megacheiran arthropod
    Lower Cambrian
    Cambrian
    South Australia
    paleontology
    Arthropoda
    Megacheira
    Leanchoiliidae
    Oestokerkus
    Leanchoilia
    Alalcomenaeus
    midgut gland
    phylogenesis
    Opis:
    The Leanchoiliidae is well−known from abundant material of Leanchoilia, from the Burgess Shale and Chengjiang Konservat−Lagerstätten. The first Australian member of the group is Oestokerkus megacholix gen. et sp. nov., described from the Emu Bay Shale (Cambrian Series 2, Stage 4), at Buck Quarry, Kangaroo Island, South Australia, and is intermediate in age between the well known leanchoiliid species from the Burgess Shale and Chengjiang. Phylogenetic analysis of “short great appendage” arthropods (Megacheira) in the context of the chelicerate stem group resolves the Australian species as sister to Burgess Shale, Utah, and Chengjiang Leanchoilia species, but most readily distinguished from Leanchoilia and Alalcomenaeus by a different telson shape, interpreted as being forked, widening distally, and with a few dorsally curved spines at the posterior angle. Leanchoiliid interrelationships are stable to alternative character weights, and Megacheira corresponds to a clade in most analyses.
    Źródło:
    Acta Palaeontologica Polonica; 2011, 56, 2
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    BIBO stabilisation of continuous-time Takagi–Sugeno systems under persistent perturbations and input saturation
    Autorzy:
    Salcedo, J. V.
    Martínez, M.
    García-Nieto, S.
    Hilario, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/330698.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    linear matrix inequalities
    fuzzy system
    nonlinear system
    input saturation
    disturbance
    liniowe nierówności macierzowe
    układ rozmyty
    układ liniowy
    nasycenie wejściowe
    Opis:
    This paper presents a novel approach to the design of fuzzy state feedback controllers for continuous-time non-linear systems with input saturation under persistent perturbations. It is assumed that all the states of the Takagi–Sugeno (TS) fuzzy model representing a non-linear system are measurable. Such controllers achieve bounded input bounded output (BIBO) stabilisation in closed loop based on the computation of inescapable ellipsoids. These ellipsoids are computed with linear matrix inequalities (LMIs) that guarantee stabilisation with input saturation and persistent perturbations. In particular, two kinds of inescapable ellipsoids are computed when solving a multiobjective optimization problem: the maximum volume inescapable ellipsoids contained inside the validity domain of the TS fuzzy model and the smallest inescapable ellipsoids which guarantee a minimum *-norm (upper bound of the 1-norm) of the perturbed system. For every initial point contained in the maximum volume ellipsoid, the closed loop will enter the minimum *-norm ellipsoid after a finite time, and it will remain inside afterwards. Consequently, the designed controllers have a large domain of validity and ensure a small value for the 1-norm of closed loop.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2018, 28, 3; 457-472
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Risk Management Tools in the Agriculture Sector: an Updated Bibliometric Mapping Analysis
    Autorzy:
    García-Machado, Juan J.
    Greblikaitė, Jolita
    Iranzo Llopis, Carlos E.
    Powiązania:
    https://bibliotekanauki.pl/articles/47271571.pdf
    Data publikacji:
    2024
    Wydawca:
    Uniwersytet Ekonomiczny w Katowicach
    Tematy:
    risk management tools
    agriculture
    Common Agricultural Policy (CAP)
    Income Stabilisation Tool (IST)
    bibliometric mapping
    VOSviewer
    Opis:
    PURPOSE: The aim of this paper is to analyse the latest research carried out to identify the risk management tools that farmers should possess to be effective and achieve success in their businesses. To this end, a review of the literature was conducted through the most relevant subjects, categories, countries, journals, and cited authors and articles, as well as visualising the interrelations through the co-occurrence of key terms. DESIGN/METHOD: A systematic review of the literature and a bibliometric mapping of the publications indexed in the Web of Science Core Collection (WoSCC) and Scopus was conducted using VOSviewer software. During the search process, 472 references from WoSCC and 704 from Scopus databases, for a search period from 2014 to 2023, were obtained. After a thorough reviewing process, the final number was 100 articles collected in 74 journals and written by 320 authors for WoSCC; and 136 articles, 90 journals and 435 authors for Scopus. RESULTS/FINDINGS: Our study indicates that farmers’ risk management requires the acquisition of knowledge of risk management tools, specifically differentiating between on-farm and off-farm instruments, and the training competences necessary for their implementation which are acquired both through their business management and others developed during the work in the crops, farming and agroindustry. Based on co-occurrence frequencies of key terms, several term maps provide visual representations of the latest research in the Agricultural Risk Management Tools (ARMT) and, more specifically, of the grouping around five main clusters, namely Strategy Decisions on Adaptation to Climate Change, Risk Impacts on Agricultural Production, Attitudes towards Risk Management Tools, Agricultural Policy and Risk Management, and Farms Management Systems and Models.
    Źródło:
    Studies in Risk and Sustainable Development; 2024, 398; 1-26
    2720-6300
    Pojawia się w:
    Studies in Risk and Sustainable Development
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Importance of Internet And Online Social Networks in the Spanish Hotel Sector
    Autorzy:
    Infante-Moro, A.
    Infante-Moro, J-C.
    Martínez-López, F-J.
    García-Ordaz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/118135.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Promocji Wiedzy
    Tematy:
    hotels
    online social networks
    internet
    e-commerce
    cross-sectional study
    Opis:
    This paper is a cross-sectional study on the use of Internet and Online Social Networks in the Spanish hotel sector compared to Spanish companies in other sectors. The conclusions from this extensive survey are that the use of online social networks is more important and is more developed in the hotel sector than in Spanish companies in general. However, although it gives considerable importance to online social networks, the hotel sector needs to revise its rules of usage. The use of new tools such as e-commerce to sell the hotel stays must increase, and marketing efforts should be geared more towards online social networks because the hotel sector is currently losing ground in a market that generates more and more potential clients and sales by the day.
    Źródło:
    Applied Computer Science; 2016, 12, 1; 75-86
    1895-3735
    Pojawia się w:
    Applied Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Copper Addition on Pitting Corrosion of MA-Al
    Autorzy:
    Aranda, B.
    Cuevas, F.
    Cintas, J.
    Herrera-García, M.
    Urban, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1191707.pdf
    Data publikacji:
    2016-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.20.Ev
    82.45.Bb
    Opis:
    This paper is intended to highlight the effect of copper addition on the pitting corrosion resistance of aluminium-base powder metallurgy parts. Results obtained on these mechanically alloyed (MA) specimens are compared with parts of MA-Al without added copper, as well as with commercial aluminium alloys. Immersion tests from 2 to 96 hours in 3.5% NaCl solutions, and potentiostatic techniques, were used to study the pitting corrosion. It was concluded that copper addition, in a similar way that in commercial aluminium alloys, produces a negative effect on the pitting corrosion resistance, because of the formation of Al₂Cu. These precipitates produce galvanic cells that favour the specimen pit. Therefore, increasing the copper content of MA-Al, although improving their ductility, worsens the pitting corrosion resistance of these alloys.
    Źródło:
    Acta Physica Polonica A; 2016, 129, 4; 788-791
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A new Eliomys from the Late Miocene of Spain and its implications for the phylogeny of the genus
    Autorzy:
    Mansino, S.
    Garcia-Alix, A.
    Ruiz-Sanchez, F.J.
    Montoya, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/21189.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Opis:
    In this paper, we describe a previously unknown species of the glirid Eliomys from the Late Miocene and Early Pliocene Cabriel, Alcoy and Granada basins of southeastern Spain. Eliomys yevesi sp. nov. is characterized by its relative small size, narrow lingual wall and common presence of two centrolophs in the upper molars, and well-developed centrol-ophids in the lower molars. The new species is the probable ancestor of E. intermedius, which in turn represents the ancestor of the extant E. quercinus. According to its morphologic and biometric features, the origin of E. yevesi sp. nov. is likely to be found in some population of E. truci from the Late Miocene. Based on these affinities, we propose the lineage E. truci-E. yevesi sp. nov.-E. intermedius-E. quercinus, in which there is a trend towards the development of centrolophs, as well as the reduction of accessory crests.
    Źródło:
    Acta Palaeontologica Polonica; 2015, 60, 3
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Steering inspection by means of tyre force measure
    Autorzy:
    Diaz, V.
    García-Pozuelo, D.
    Boada, M. J. L.
    Gauchia, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/329294.pdf
    Data publikacji:
    2008
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    bezpieczeństwo
    pojazd
    układ kierowniczy
    opona
    PMVI
    vehicle's safety
    steering inspection
    dynamometer plate
    lateral tyre force
    Opis:
    A few systems, such as steering, brakes or suspension, critically affect the vehicle's safety. In light of this, it is necessary to check these elements up to a certain age in order to maintain the vehicle in optimal safety conditions. This study is part of a project about effectiveness of Periodic Motor Vehicle Inspections (PMVI), in order to suggest metodologies, instruments and criterions to inspect the vehicle´s safety. It´s well known the relationship between steering geometries and the force in contact patch. The measurement of these geometries is important to evaluate the vehicle dynamic performance. The main objective is to evaluate the steering inspection method at low speed, current rejection criteria in order to analyze the effect of these results in vehicle´s safety behaviour in real dynamic conditions. The angle that has more influence on the PMVI inspection is the toe angle, being this one the principal parameter of analysis. Experimental force in contact patch with dynamometer plate and simulation results with CarSimTM have been carried out in order to validate the methodology of steering inspection and to check the information obtained in these tests.
    Źródło:
    Diagnostyka; 2008, 3(47); 47-54
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Molecular identification of Buxtonella sulcata from associated-diarrhea in water buffaloes (Bubalus bubalis) in the Philippines
    Autorzy:
    Dianso, J.A.
    Garcia, G.G.
    Belotindos, L.P.
    Mingala, C.N.
    Powiązania:
    https://bibliotekanauki.pl/articles/5920.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Źródło:
    Annals of Parasitology; 2018, 64, 2
    0043-5163
    Pojawia się w:
    Annals of Parasitology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A new advisor system to detect the tap hole whistling and splashing in a Blast Furnace
    Nowy system doradczy do detekcji zjawiska wydmuchiwania i rozprysku z otworu spustowego w wielkim piecu
    Autorzy:
    Ruiz-Bustinza, I.
    Mochon, J.
    Verdeja, L. F.
    Garcia-Carcedo, F.
    Parra, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/353337.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    piec hutniczy
    optymalizacja
    blast furnace
    optimization
    Opis:
    The objective is to determine the moment from which a Blast Furnace tap hole must be closed and consequently the exit of materials (hot metal and slag), by studying the conventional video images obtained at the exit of the tap hole of the BF in order to optimize the process performance. This point is characterized by a remarkable increase in the width of the flow which corresponds to the maximum exit of the slag surrounding the melted metal (and a significant decrease in the pig iron). This video based system is compared to the information provided by the EMF signals (electromotive forces).
    W celu optymalizacji wydajności procesu wykonano pracę, której przedmiotem było określenie momentu w którym otwór spustowy wielkiego pieca musi zostać zatkany, a w konsekwencji również wypływ ciekłych produktów procesu (surówki, żużla) zakończony, określenie tego momentu, uzyskano przez analizę standardowych obrazów wideo wykonanych dla miejsca wydostania się ciekłych produktów z otworu spustowego. Moment ten charakteryzuje się znaczącym zwiększeniem szerokości przepływu strumienia, który odpowiada maksymalnemu wydostawaniu się żużla otaczającego ciekły metal (przy znaczącym zmniejszeniu wypływu surówki). System został oparty o technikę wideo, porównano go z informacjami dostarczonymi przez sygnał EMF (siły elektromotoryczne).
    Źródło:
    Archives of Metallurgy and Materials; 2010, 55, 4; 1125-1130
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    High performance quantum key distribution prototype system using a commercial off-the-shelf solution: experimental and emulation demonstrations
    Autorzy:
    Lopez-Leyva, J. A.
    Ruiz-Higuera, J.
    Arvizu-Mondragon, A.
    Santos-Aguilar, J.
    Ramos-Garcia, R.
    Ponce-Camacho, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/174150.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    quantum cryptography
    final secret key rate
    FSecKR
    coherent states
    Opis:
    A continuous variable-quantum key distribution system prototype that uses weak coherent states with a diffused phase, commercial off-the-shelf devices, complete free space 90-degrees hybrid and simplified quantum protocol is proposed in this paper. In general, the quantum transmitter-receiver shows an experimental average quantum bit error rate of 30% using auto-homodyne detection with 0.25 photons per pulse in locking phase mode. The emulated final secret key rate measurements were 20 and 40 Kbps for minimum (30 Mbps) and maximum (90 Mbps) throughput, respectively, in a real traffic network using databases for the quantum keys generated by two true random number generators.
    Źródło:
    Optica Applicata; 2017, 47, 3; 411-419
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    ReSySTER: A hybrid recommender system for Scrum team roles based on fuzzy and rough sets
    Autorzy:
    Colomo-Palacios, R.
    González-Carrasco, I.
    López-Cuadrado, J. L.
    García-Crespo, Á.
    Powiązania:
    https://bibliotekanauki.pl/articles/331282.pdf
    Data publikacji:
    2012
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    zbiór rozmyty
    zbiór przybliżony
    Scrum
    pakiet roboczy
    system polecenia
    fuzzy set
    rough set
    work package
    recommender system
    Opis:
    Agile development is a crucial issue within software engineering because one of the goals of any project leader is to increase the speed and flexibility in the development of new commercial products. In this sense, project managers must find the best resource configuration for each of the work packages necessary for the management of software development processes in order to keep the team motivated and committed to the project and to improve productivity and quality. This paper presents ReSySTER, a hybrid recommender system based on fuzzy logic, rough set theory and semantic technologies, aimed at helping project leaders to manage software development projects. The proposed system provides a powerful tool for project managers supporting the development process in Scrum environments and helping to form the most suitable team for different work packages. The system has been evaluated in a real scenario of development with the Scrum framework obtaining promising results.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2012, 22, 4; 801-816
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    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:
    Environmental evaluation with chemical sensors in the Palace Museum of Wilanow
    Autorzy:
    Pena-Poza, J.
    Garcia-Heras, M.
    Palomar, T.
    Laudy, A.
    Modzelewska, E.
    Villegas, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/200179.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    heritage
    sensor
    acidity
    temperature
    sol-gel
    Wilanów
    Opis:
    Environmental evaluation arises as an innovative procedure to carry out preventive conservation of Cultural Heritage items. Parameters contributing to the proper conservation of such items can be monitored and assessed. Chemical sensors with optical response synthesised by the sol-gel method are useful for a complete and accurate environmental evaluation. Physical-chemical mechanisms of decay and degradation of materials can be predicted from the sensors response, which will favour the decisions on the adequate procedures to avoid damage. Sol-gel sensors prepared and applied in the present work are reversible, reusable and regenerable. Their optical response provides a change of colour vs. the parameters to which they are sensitive. Both temperature and environmental acidity have been monitored in several selected chambers of the Palace Museum of Wilanów (Warsaw, Poland). The optical response of sensors was recorded by visible spectrophotometry from June 2010 to December 2010. The results inform on the environmental conservation conditions, both indoor and outdoor the Palace. Main innovation of the research carried out concerns the evaluation of the environmental acidity as an essential parameter to be taken into account for the proper conservation that can not be measured by conventional methods.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2011, 59, 3; 247-252
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    X-ray diffraction microstructural analysis of swelling by ethylene glycol in two reference clay minerals
    Autorzy:
    García Tomás, F.
    Kojdecki, M.
    Pardo, P.
    Ibańez, R.
    Álvarez Larena, A.
    Bastida, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1152823.pdf
    Data publikacji:
    2016-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    68.37.Vj
    61.72.Dd
    Opis:
    Kaolinite and montmorillonite are two clay minerals with different structures: dioctahedral 1:1 without layer charge and dioctahedral 2:1 with low layer charge. X-ray-diffraction microstructural analysis of two fractions of two reference clays (with kaolinite or montmorillonite) from the Clay Minerals Society Source Clay Repository were performed by the Voigt function method to provide microstructural data not available in the baseline studies of this Repository. A rough agreement was found between crystallite sizes determined from X-ray diffraction patterns and from images by field-emission scanning electron microscopy. In addition, the influence of swelling by ethylene-glycol on crystallite size was studied by the mentioned method. Two factors were found to affect the crystallite size variation in ethylene-glycol-treated clay minerals: (i) the increase of the unit cell in [001] direction due to the interlayer absorption of ethylene glycol molecules in the case of swelling minerals and (ii) the physisorption at the surfaces of the crystallites. Both effects operate in the case of montmorillonite, whereas just the latter one is expected in kaolinite.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 4; 876-879
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Repeatability and reproducibility of dry and wet heat resistance tests according to EN 12721 and EN 12722
    Powtarzalność i odtwarzalność badań odporności na ciepło suche i mokre według norm EN 12721 and EN 12722
    Autorzy:
    Perez, R.M.
    Roux, M.-L.
    Milla, J.L.
    Garcia, S.
    Delorme, T.
    Lacourt, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/52760.pdf
    Data publikacji:
    2012
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Technologii Drewna
    Tematy:
    repeatability
    reproducibility
    dry heat resistance test
    wet heat resistance test
    EN 12721 standard
    EN 12722 standard
    European standard
    surface resistance
    furniture
    furniture surface
    Opis:
    The European Standards 12721 and 12722 specify a method for the assessment of the surface resistance to wet and dry heat of furniture respectively. The aim of the research is to establish data on the test precision of both tests in order that this precision is mentioned on the standards and test reports based on them. It is intended to measure the reproducibility and repeatability according to the standard ISO 5725-2 of data obtained in an international round-robin exercise carried out by eight participating laboratories expert in furniture surfaces. The results presented show that the repeatability variance is almost 0, while the between-laboratory variance is between 0 and 1, according to the order of increment of the assessment rating code.
    Normy europejskie 12721 i 12722 określają metodę oceny odporności powierzchni meblowych na mokre i suche ciepło. Celem badań jest ustalenie danych dotyczących precyzji oby rodzajów badań w celu umieszczenia tych informacji w normach i sprawozdaniach z badań opartych na tych normach. Zamierza się dokonać pomiarów powtarzalności i odtwarzalności wyników międzynarodowego badania round-robin przeprowadzonego przez osiem laboratoriów, które specjalizują się w badaniu powierzchni, zgodnie z normą ISO 5725-2. Zaprezentowane wyniki wskazują, że wariancja powtarzalności jest bliska 0, natomiast wariancja pomiędzy laboratoriami mieści się w przedziale 0 i 1, zgodnie z porządkiem wzrostu kodów oceny.
    Źródło:
    Drewno. Prace Naukowe. Doniesienia. Komunikaty; 2012, 55, 187
    1644-3985
    Pojawia się w:
    Drewno. Prace Naukowe. Doniesienia. Komunikaty
    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:
    Synthesis and characterization of a citric and lipoic acids-derived dendrimer
    Synteza i charakterystyka dendrymeru pochodzącego z kwasu cytrynowego i liponowego
    Autorzy:
    Salgado-Delgado, René
    Salgado-Delgado, Areli M.
    Olarte-Paredes, Alfredo
    García-Fuentes, Juan J.
    López-Lara, Teresa
    Hernández-Zaragoza, Juan B.
    García-Hernández, Edgar
    Castaño, Víctor M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2202634.pdf
    Data publikacji:
    2023
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
    Tematy:
    dendrimer
    citric acid
    lipoic acid
    dendrymer
    kwas cytrynowy
    kwas liponowy
    Opis:
    The paper describes the synthesis and characterization of two third generation dendrimers from citric acid and a variant with a dendron terminated with lipoic acid. FTIR and C NMR confirmed the presence of signals characteristic for the dendrimer functional groups OH, C-O, C=O, C-H and C-S. DSC showed that, unlike citric acid, the dendrimer is amorphous. SEM revealed changes in the structure of citric acid particles in each dendrimer generation. In addition, the structure was more homogeneous. Dendrimers are hydrophobic due to ester linkages. Contact angle > 90° confirms their hydrophobic char-acter. Moreover, the dendrimer with a dendron terminated with lipoic acid absorbs Cu+2 and Fe+3metal ions, so it can be used as an adsorbent for heavy metals.
    W pracy opisano syntezę i charakterystykę dwóch dendrymerów trzeciej generacji z kwasu cytrynowego oraz wariantu z dendronem zakończonym kwasem liponowym. Metodą FTIR i C NMR potwierdzono sygnały charakterystyczne dla grup funkcyjnych dendrymeru OH, C-O, C=O, C-H i C-S. Metodą DSC wykazano, że w odróżnieniu od kwasu cytrynowego dendrymer jest amorficzny. Mikrofotografie SEM wykazały zmiany w strukturze cząstek kwasu cytrynowego w każdym pokoleniu dendrymeru. Ponadto struktura była bardziej jednorodna. Dzięki wiązaniom estrowym otrzymane dendrymery są hydrofobowe, co potwierdza kąt zwilżania > 90°. Wykazano również, że dendrymer z dendronem zakończonym kwasem liponowym absorbuje jony metali Cu+2 i Fe+3, dzięki czemu może być stosowany jako adsorbent metali ciężkich.
    Źródło:
    Polimery; 2023, 68, 1; 25--31
    0032-2725
    Pojawia się w:
    Polimery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Theoretical Analysis of Ballistic Electron Emission Microscopy: Band Structure Effects and Attenuation Lengths
    Autorzy:
    de Andres, P. L.
    Reuter, K.
    Garcia-Vidal, F. J.
    Flores, F.
    Hohenester, U.
    Kocevar, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1968707.pdf
    Data publikacji:
    1998-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.16.Ch
    72.10.Bg
    73.20.At
    Opis:
    Using a quantum mechanical approach, we compute the ballistic electron emission microscopy current distribution in reciprocal space to compare experimental and theoretical spectroscopic I(V) curves. In the elastic limit, this formalism is a "parameter-free" representation of the problem. At low voltages, low temperatures, and for thin metallic layers, the elastic approximation is enough to explain the experiments (ballistic conditions). At low temperatures, inelastic effects can be taken into account approximately by introducing an effective electron-electron lifetime as an imaginary part in the energy. Ensemble Monte Carlo calculations were also performed to obtain ballistic electron emission microscopy currents in good agreement with the previous approach.
    Źródło:
    Acta Physica Polonica A; 1998, 93, 2; 281-287
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Efficacy comparison of intraperitoneal anaesthesia and post-operative analgesia regimens in laboratory rats
    Autorzy:
    Moreno-Mateo, F.
    García-Medrano, B.
    Álvarez-Barcia, A.
    Gayoso, M.J.
    Martín-Ferrero, M.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087353.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    pain in rats
    anesthesia for rodents
    analgesia for rodents
    laboratory rats
    animal welfare
    Źródło:
    Polish Journal of Veterinary Sciences; 2020, 23, 1; 127-132
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    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:
    Permanent Magnetism in Thiol Capped Nanoparticles Gold and ZnO
    Autorzy:
    Crespo, P.
    García, M.
    Fernández-Pinel, E.
    de la Venta, J.
    Merino, J.
    Quesada, A.
    Hernando, A.
    Fernández, A.
    Penadés, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1813862.pdf
    Data publikacji:
    2008-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.75.+a
    73.22.-f
    75.30.Hx
    Opis:
    In spite of the diamagnetic behavior exhibited by bulk ZnO and Au, a ferromagnetic-like behavior is induced in nanoparticles of both systems by appropriate surface functionalization. By capping with thiol derivatized molecules, magnetic hysteresis is observed even at room temperature, whereas the magnetization has a very little temperature dependence. Capping induces an alteration of their electronic configuration that depends on the capping molecule, as evidenced by X-ray absorption spectroscopy, that strongly affects their magnetic properties.
    Źródło:
    Acta Physica Polonica A; 2008, 113, 1; 515-520
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Benthic and Planktic Foraminifera as Indicators of Late Glacial to Holocene Paleoclimatic Changes in a Marginal Environment: An Example from the Southeastern Bay of Biscay
    Autorzy:
    Garcia, Jennifer
    Mojtahid, Meryem
    Howa, Hélène
    Michel, Elisabeth
    Schiebel, Ralf
    Charbonnier, Céline
    Anschutz, Pierre
    Jorissen, Franciscus J.
    Powiązania:
    https://bibliotekanauki.pl/articles/763439.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
    Tematy:
    Benthic Foraminifera, Planktic Foraminifera, Stable isotopes, Bay of Biscay, Holocene, Iberian Poleward Current (IPC)
    Opis:
    Benthic and planktic foraminiferal assemblages from two sediment cores (2000 m depth, 44°33′N-2°45′W) were analyzed to first compare modern and dead faunas and next to study changes in the hydrology of the southeastern Bay of Biscay (SE BoB) over the last 12.8 cal ka BP. Considering benthic ecosystem characteristics, the first part of the paleorecord (12.8–7.6 cal ka BP) is composed of laminated sediments that may have resulted from turbiditic overflow events, whereas occurrences of transported species (e.g. Nonionella sp., Cassidulina carinata) attest of continental influence at the core location. After 7.6 cal ka BP, the sediment becomes bioturbated concomitantly to the stabilization of the sea-level. The benthic foraminiferal fauna is largely dominated by Uvigerina peregrina suggesting a high seasonality with seasonal pulsed organic matter fluxes to the seafloor. On the other hand, the planktic foraminiferal composition indicates that surface water masses were under the influence of the polar front in the early record, which retreated at about 11.5 cal ka BP. The early Holocene is characterized by relatively warm and stratified water masses at 8.4–4.8 cal ka BP. The last 4.8 cal ka BP records a gradual sea surface water cooling trend and enhanced foraminiferal production from ~2.6 cal ka BP until present. The early (12.8–10.5 cal ka BP) and late (2.3–1.7 cal ka BP) Holocene are characterized by the presence of the planktic species Globigerinoides ruber probably caused by intrusions of the Iberian Poleward Current (IPC), and a negative state of the North Atlantic Oscillation (NAO).
    Źródło:
    Acta Protozoologica; 2013, 52, 3
    1689-0027
    Pojawia się w:
    Acta Protozoologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Intellectual and cognitive structures of the agricultural competitiveness research under climate change and structural transformation
    Autorzy:
    García-Agüero, Ana-Isabel
    Teran-Yepez, Eduardo
    Batlles-delaFuente, Ana
    Belmonte-Ureña, Luis J.
    Camacho-Ferre, Francisco
    Powiązania:
    https://bibliotekanauki.pl/articles/39829629.pdf
    Data publikacji:
    2023
    Wydawca:
    Instytut Badań Gospodarczych
    Tematy:
    agriculture
    competitiveness
    bibliographic coupling
    co-word analysis
    thematic structure
    current research trends
    sustainable agriculture
    Opis:
    Research background: Although agricultural competitiveness is not a new topic, it is worth noting that it has recently come back to the attention of researchers due to various factors such as climate change, food security, price uncertainty, or structural transformation. Consequently, a growing number of articles have emerged on this subject, leading to shifts in overarching research trends and the structure of research within this domain. Purpose of the article: This study aims to facilitate a comprehensive understanding of the research constituents within the field of agricultural competitiveness. Additionally, it seeks to unveil the intellectual and cognitive frameworks spanning the years 1990 to 2022. This exploration will enable the identification of thematic clusters that both shape and guide the field, shedding light on current research trends. Methods: This research employs bibliometric analysis, specifically employing performance analysis and science mapping techniques like bibliographic coupling and co-word analyses. These tools are harnessed to scrutinize the constituents of research and the underlying intellectual and cognitive structures inherent to the agricultural competitiveness field. A dataset of 622 articles from the Web of Science database was subjected to analysis using the VOSviewer software. Findings & value added: The findings prominently illustrate a notable surge in research activity within this domain, with a substantial proportion of articles originating from the United States. The study further identifies six distinct research topics within agricultural competitiveness: (1) energy efficiency and bioenergy, (2) price fluctuation, uncertainty, and market behavior, (3) structural transformation of agriculture, (4) rural development, (5) policy issues, and (6) climate change. Moreover, the research offers insights into potential future research avenues. The uniqueness and value of this work stem from its pioneering approach, being the first to synthesize agricultural competitiveness research through an amalgamation of bibliometric techniques. Furthermore, the study contributes substantially to the theoretical advancement of agricultural competitiveness research.
    Źródło:
    Oeconomia Copernicana; 2023, 14, 4; 1175-1209
    2083-1277
    Pojawia się w:
    Oeconomia Copernicana
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Solar generation estimation in electric power systems for prospective frequency control studies
    Autorzy:
    Martínez-García, A. A.
    Torres-Breffe, O. E.
    Vilaragut-Llanes, M.
    Delgado-Fernandez, O.
    Szpytko, J.
    Salgado-Duarte, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/2172499.pdf
    Data publikacji:
    2022
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    green shipping
    solar power
    electric power systems
    energy storage systems
    photovoltaic power generation
    cuban electrical system
    energy sources
    photo voltage solar generation
    Opis:
    Increasing the presence of non-conventional clean energy sources in Electrical Power Systems (EPS) is a global strategic goal. Particularly, photovoltaic systems are attractive due to their versatility, low maintenance cost, easy installation, noiselessness, etc. However, the integration of photovoltaic systems into EPS increases the necessary regulation actions performed by system generators due to stochastic fluctuations of solar radiation, especially on cloudy days. Even using complex models that consider many variables, solar irradiation and its corresponding photovoltaic power generation are difficult variables to forecast with accuracy in cloudy day scenarios. To address this problem, Energy Storage Systems (BESS) have been proposed as a solution to mitigate the variability of photovoltaic generation, which reduce the need to use traditional spinning reserves and provide auxiliary grid services. The BESS selection required to mitigate photovoltaic generation is directly related to the worst-case daily variability of photovoltaic generation in the short term. This paper proposes a practical estimation of daily perspective photo voltage solar generation curve in Electrical Power Systems.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2022, 16, 2; 211--217
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Postcranial remains of basal typotherian notoungulates from the Eocene of northwestern Argentina
    Autorzy:
    Armella, M.A.
    Garcia-Lopez, D.A.
    Babot, M.J.
    Deraco, V.
    Herrera, C.M.
    Saade, L.
    Bertelli, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2082173.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Mammalia
    Notoungulata
    calcaneum
    astragalus
    plantigrade
    foot stances
    Paleogene
    South America
    Opis:
    Notoungulates represent the most taxonomically diverse and temporally and geographically widespread group among South American native ungulates. Here, we analyze anatomical and systematic aspects of proximal tarsal bones recovered from the Lower and Upper Lumbrera formations (middle and late middle Eocene) in northwestern Argentina. We provide detailed descriptions, comparisons, and infer foot stances and range of movements for the taxa implicated. Material studied includes astragali belonging to the oldfieldthomasiid Colbertia lumbrerense (Lower Lumbrera Formation), a set of proximal tarsals referred as Typotheria indet. (Lower Lumbrera Formation), and tarsals (also including navicular and cuboid) of the informal taxon “Campanorco inauguralis” (Upper Lumbrera Formation). The comparison of the tarsals of Colbertia lumbrerense (middle Eocene of Argentina) with Colbertia magellanica (early Eocene of Brazil) reveals several differences including variations on the development and arrangement of articular facets, and the size of the dorsal astragalar foramen in the Argentinean species. The specimen of Typotheria indet. shows morphological affinities with basal interatheriid taxa. However, its larger size contrasting with the overall small body sizes of Eocene interatheriids precludes an indisputable taxonomic assignment. Concerning “Campanorco inauguralis”, our observations indicate that there is no morphological evidence for a close phylogenetic relationship with Mesotheriidae. It presents a “reversed alternating tarsus” condition, which is also observed in Leontiniidae, “Notohippidae”, Toxodontidae, and some typotherians. However, the spectrum of singularities exhibited by this form precludes the assessment of its relationships in the context of the Paleogene radiation of Typotheria and it is necessary to extend the comparison to Eocene notoungulates. Finally, in a morphofunctional context a plantigrade foot posture is inferred for the specimens here reported. These observations have the potential to provide functional proxies for paleoecological reconstructions to be applied to the study of the early radiation of these notoungulate faunas.
    Źródło:
    Acta Palaeontologica Polonica; 2020, 65, 2; 1-17
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A heuristic method for detecting and locating faults employing electromagnetic acoustic transducers
    Heurystyczna metoda wykrywania i lokalizowania usterek z wykorzystaniem elektromagnetycznych przetworników akustycznych
    Autorzy:
    Gómez, C. Q. M.
    García, F. P. M.
    Arcos, A. J.
    Cheng, L.
    Kogia, M.
    Mohimi, A.
    Papaelias, M. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1365720.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
    Tematy:
    fault detection and diagnosis
    electromagnetic acoustic transducers (EMAT)
    wavelet transforms
    non destructive test
    guided waves
    wykrywanie i diagnozowanie wad
    elektromagnetyczne przetworniki akustyczne
    EMAT
    transformaty falkowe
    badania nieniszczące
    fale prowadzone
    Opis:
    The objective of this paper is to demonstrate a novel signal processing for detection, identification and flaw sizing of structural damage using ultrasonic testing with Electromagnetic Acoustic Transducers (EMATs). Damage detection involves the recognition of a defect that exists within a structure. Damage location is the identification of the geometric position of the defect. Defect classification is the cluster of the damage type into multiple damage scenarios. In the absence of external interferences, a good measure of detectability of a flaw is its signal-to-noise ratio (SNR). Although the SNR depends on various parameters such as electronics used, material properties, e.g. homogeneity and damping, and flaw size, it can be improved using advanced signal processing. The main scientific novelties presented in this paper focus on filtering signal noise through advanced digital signal processing; incorporating wavelet transforms for image and signal representation enhancements; investigating multi-parametric analysis for noise identification and defect classification; studying attenuation curves properties for defect localisation improvement and flaw sizing and location algorithm development.
    Celem niniejszego artykułu jest omówienie nowatorskiego sposobu przetwarzania sygnałów w celu wykrywania, identyfikacji i oceny uszkodzeń strukturalnych przy użyciu ultrasonograficznych testów za pomocą elektromagnetycznych przetworników akustycznych (EMAT). Wykrywanie uszkodzeń polega na rozpoznaniu istniejących defektów wewnątrz danej struktury. Lokalizacja uszkodzeń sprowadza się do identyfikacji geometrycznego położenia defektu. Klasyfikacja defektu to klaster typu uszkodzenia w wielu scenariuszach uszkodzeń. W przypadku braku zewnętrznych zakłóceń, dobrym wskaźnikiem wykrywalności błędu jest stosunek sygnału do szumu (SNR). Pomimo tego, że SNR zależy od różnych parametrów, takich jak użyta elektronika, właściwości materiału, np. jednorodność i tłumienie, a także wielkość wady, wskaźnik ten można poprawić przy użyciu zaawansowanego przetwarzania sygnałów. Główne nowe zagadnienia naukowe przedstawione w niniejszym artykule skupiają się na filtrowaniu szumu sygnału za pomocą zaawansowanego przetwarzania sygnału cyfrowego, w tym wykorzystując transformaty falkowe w celu ulepszenia obrazu i sygnału; badanie analizy wieloparametrycznej w celu identyfikacji szumów i klasyfikacji defektów; badanie właściwości krzywych osłabiania w celu sprawniejszego wykrywania i oceny wad oraz rozwoju algorytmu lokalizacji.
    Źródło:
    Eksploatacja i Niezawodność; 2017, 19, 4; 493-500
    1507-2711
    Pojawia się w:
    Eksploatacja i Niezawodność
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Phenolic Compounds in Agro-Industrial Waste of Mango Fruit: Impact on Health and Its Prebiotic Effect – a Review
    Autorzy:
    Nicolás García, Mayra
    Borrás Enríquez, Anahí J.
    González Escobar, Jorge L.
    Calva Cruz, Oscar D.
    Pérez Pérez, Viridiana
    Sánchez Becerril, Mayra
    Powiązania:
    https://bibliotekanauki.pl/articles/16538530.pdf
    Data publikacji:
    2023-02-21
    Wydawca:
    Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
    Tematy:
    mango processing
    mango wastes
    phytochemicals
    biological properties
    gut health
    Opis:
    The fruit processing industry generates huge amounts of waste annually, causing severe environmental problems. Mango processing produces around 20 million tons of wastes from the non-consumed fraction, mainly peels and seeds, which constitute 30–60% of the fruit weight. However, various phytochemicals found in these residues have been implicated in preventing cancer and also cardio-metabolic and gastrointestinal diseases. Particularly, phenolic compounds hold a promising potential to be utilized as modulatory agents of the human gut microbiota (prebiotics-like actions). This review article mainly discusses the effect of phenolics from mango wastes on gut microbiota modulation and its beneficial repercussions for human health. Moreover, it also discusses the importance of phenolic compounds of mango peel and seed kernel residues, their extraction, identification, and quantification.
    Źródło:
    Polish Journal of Food and Nutrition Sciences; 2023, 73, 1; 5-23
    1230-0322
    2083-6007
    Pojawia się w:
    Polish Journal of Food and Nutrition Sciences
    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:
    Orchards pruning to energy - the results of the environmental impact assessment of the new logistic chain developed within the EuroPruning project - Part 2
    Gałęzie z sadów na cele energetyczne - wyniki oceny oddziaływania na środowisko nowego łańcucha logistycznego opracowanego w ramach projektu EuroPruning - Cz. 2
    Autorzy:
    Dyjakon, A.
    Boer den, J.
    Garcia-Galindo, D.
    Adamczyk, F.
    Lopez, E.
    Sebastian, F.
    Suardi, A.
    Gebresenbet, G.
    Jirjis, R.
    Bosona, T.
    Germer, S.
    Bischoff, W. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/93472.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Inżynierii Rolniczej
    Tematy:
    pruned biomass
    energetic utilisation
    environmental impact assessment
    biomasa
    gałęzie
    wykorzystanie energetyczne
    ocena oddziaływania na środowisko
    Opis:
    To determine the environmental impact, the assessment of the EuroPruning project strategy has been carried out in accordance with the checking and scooping list related to Directive 97/11/EC. Additionally, some suggestions and recommendations to prevent/minimize the hazard of accidents or negative interaction on surrounding have been elaborated (according to the suggested procedure in ISO 14001 methodology: risk definition and prevention action proposal). As a consequence, the results of the inspection during the demo tests taking place in different orchards/plantations regarding the performance of the machineries operation, farmers’ habits and pruning residues harvesting procedures have been presented, in order to diagnose and determine possible risks that may occur and influence negatively the local environment. Similar activities have been carried out during the storage tests and transportation processes.
    W celu określenia stopnia oddziaływania na środowisko strategii przyjętej w projekcie EuroPruning, polegającej na wykorzystaniu ściętych gałęzi z sadów i plantacji w celach energetycznych, przeprowadzono analizę w oparciu o zasady postępowania zawarte w dyrektywie 97/11/EC. Dodatkowo, w odniesieniu do procedury zawartej w metodologii ISO 14001: definicja ryzyka i proponowane działania prewencyjne, opracowano wskazówki i rekomendacje mające na celu eliminację lub ograniczenie ryzyka wypadku czy negatywnego oddziaływania na otoczenie zewnętrzne. W konsekwencji, przedstawiono wyniki inspekcji dokonanych podczas badań testowych przeprowadzanych w różnych sadach i plantacjach drzew owocowych (obejmujących działanie pracujących maszyn, nawyki sadownika oraz proces zbierania ściętych gałęzi) pod kątem identyfikacji oraz określenia zakresu zagrożeń, które mogą wystąpić i wpływać negatywnie na środowisko. Podobne działania przeprowadzono dla procesu magazynowania i transportu biomasy sadowniczej.
    Źródło:
    Agricultural Engineering; 2018, 22, 1; 37-48
    2083-1587
    Pojawia się w:
    Agricultural Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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